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Merge branch 'akpm-incoming-2'
[deliverable/linux.git] / drivers / net / e1000 / e1000_hw.c
1 /*******************************************************************************
2
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 */
28
29 /* e1000_hw.c
30 * Shared functions for accessing and configuring the MAC
31 */
32
33 #include "e1000.h"
34
35 static s32 e1000_check_downshift(struct e1000_hw *hw);
36 static s32 e1000_check_polarity(struct e1000_hw *hw,
37 e1000_rev_polarity *polarity);
38 static void e1000_clear_hw_cntrs(struct e1000_hw *hw);
39 static void e1000_clear_vfta(struct e1000_hw *hw);
40 static s32 e1000_config_dsp_after_link_change(struct e1000_hw *hw,
41 bool link_up);
42 static s32 e1000_config_fc_after_link_up(struct e1000_hw *hw);
43 static s32 e1000_detect_gig_phy(struct e1000_hw *hw);
44 static s32 e1000_get_auto_rd_done(struct e1000_hw *hw);
45 static s32 e1000_get_cable_length(struct e1000_hw *hw, u16 *min_length,
46 u16 *max_length);
47 static s32 e1000_get_phy_cfg_done(struct e1000_hw *hw);
48 static s32 e1000_id_led_init(struct e1000_hw *hw);
49 static void e1000_init_rx_addrs(struct e1000_hw *hw);
50 static s32 e1000_phy_igp_get_info(struct e1000_hw *hw,
51 struct e1000_phy_info *phy_info);
52 static s32 e1000_phy_m88_get_info(struct e1000_hw *hw,
53 struct e1000_phy_info *phy_info);
54 static s32 e1000_set_d3_lplu_state(struct e1000_hw *hw, bool active);
55 static s32 e1000_wait_autoneg(struct e1000_hw *hw);
56 static void e1000_write_reg_io(struct e1000_hw *hw, u32 offset, u32 value);
57 static s32 e1000_set_phy_type(struct e1000_hw *hw);
58 static void e1000_phy_init_script(struct e1000_hw *hw);
59 static s32 e1000_setup_copper_link(struct e1000_hw *hw);
60 static s32 e1000_setup_fiber_serdes_link(struct e1000_hw *hw);
61 static s32 e1000_adjust_serdes_amplitude(struct e1000_hw *hw);
62 static s32 e1000_phy_force_speed_duplex(struct e1000_hw *hw);
63 static s32 e1000_config_mac_to_phy(struct e1000_hw *hw);
64 static void e1000_raise_mdi_clk(struct e1000_hw *hw, u32 *ctrl);
65 static void e1000_lower_mdi_clk(struct e1000_hw *hw, u32 *ctrl);
66 static void e1000_shift_out_mdi_bits(struct e1000_hw *hw, u32 data, u16 count);
67 static u16 e1000_shift_in_mdi_bits(struct e1000_hw *hw);
68 static s32 e1000_phy_reset_dsp(struct e1000_hw *hw);
69 static s32 e1000_write_eeprom_spi(struct e1000_hw *hw, u16 offset,
70 u16 words, u16 *data);
71 static s32 e1000_write_eeprom_microwire(struct e1000_hw *hw, u16 offset,
72 u16 words, u16 *data);
73 static s32 e1000_spi_eeprom_ready(struct e1000_hw *hw);
74 static void e1000_raise_ee_clk(struct e1000_hw *hw, u32 *eecd);
75 static void e1000_lower_ee_clk(struct e1000_hw *hw, u32 *eecd);
76 static void e1000_shift_out_ee_bits(struct e1000_hw *hw, u16 data, u16 count);
77 static s32 e1000_write_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr,
78 u16 phy_data);
79 static s32 e1000_read_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr,
80 u16 *phy_data);
81 static u16 e1000_shift_in_ee_bits(struct e1000_hw *hw, u16 count);
82 static s32 e1000_acquire_eeprom(struct e1000_hw *hw);
83 static void e1000_release_eeprom(struct e1000_hw *hw);
84 static void e1000_standby_eeprom(struct e1000_hw *hw);
85 static s32 e1000_set_vco_speed(struct e1000_hw *hw);
86 static s32 e1000_polarity_reversal_workaround(struct e1000_hw *hw);
87 static s32 e1000_set_phy_mode(struct e1000_hw *hw);
88 static s32 e1000_do_read_eeprom(struct e1000_hw *hw, u16 offset, u16 words,
89 u16 *data);
90 static s32 e1000_do_write_eeprom(struct e1000_hw *hw, u16 offset, u16 words,
91 u16 *data);
92
93 /* IGP cable length table */
94 static const
95 u16 e1000_igp_cable_length_table[IGP01E1000_AGC_LENGTH_TABLE_SIZE] = {
96 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
97 5, 10, 10, 10, 10, 10, 10, 10, 20, 20, 20, 20, 20, 25, 25, 25,
98 25, 25, 25, 25, 30, 30, 30, 30, 40, 40, 40, 40, 40, 40, 40, 40,
99 40, 50, 50, 50, 50, 50, 50, 50, 60, 60, 60, 60, 60, 60, 60, 60,
100 60, 70, 70, 70, 70, 70, 70, 80, 80, 80, 80, 80, 80, 90, 90, 90,
101 90, 90, 90, 90, 90, 90, 100, 100, 100, 100, 100, 100, 100, 100, 100,
102 100,
103 100, 100, 100, 100, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110,
104 110, 110,
105 110, 110, 110, 110, 110, 110, 120, 120, 120, 120, 120, 120, 120, 120,
106 120, 120
107 };
108
109 static DEFINE_SPINLOCK(e1000_eeprom_lock);
110
111 /**
112 * e1000_set_phy_type - Set the phy type member in the hw struct.
113 * @hw: Struct containing variables accessed by shared code
114 */
115 static s32 e1000_set_phy_type(struct e1000_hw *hw)
116 {
117 e_dbg("e1000_set_phy_type");
118
119 if (hw->mac_type == e1000_undefined)
120 return -E1000_ERR_PHY_TYPE;
121
122 switch (hw->phy_id) {
123 case M88E1000_E_PHY_ID:
124 case M88E1000_I_PHY_ID:
125 case M88E1011_I_PHY_ID:
126 case M88E1111_I_PHY_ID:
127 hw->phy_type = e1000_phy_m88;
128 break;
129 case IGP01E1000_I_PHY_ID:
130 if (hw->mac_type == e1000_82541 ||
131 hw->mac_type == e1000_82541_rev_2 ||
132 hw->mac_type == e1000_82547 ||
133 hw->mac_type == e1000_82547_rev_2) {
134 hw->phy_type = e1000_phy_igp;
135 break;
136 }
137 default:
138 /* Should never have loaded on this device */
139 hw->phy_type = e1000_phy_undefined;
140 return -E1000_ERR_PHY_TYPE;
141 }
142
143 return E1000_SUCCESS;
144 }
145
146 /**
147 * e1000_phy_init_script - IGP phy init script - initializes the GbE PHY
148 * @hw: Struct containing variables accessed by shared code
149 */
150 static void e1000_phy_init_script(struct e1000_hw *hw)
151 {
152 u32 ret_val;
153 u16 phy_saved_data;
154
155 e_dbg("e1000_phy_init_script");
156
157 if (hw->phy_init_script) {
158 msleep(20);
159
160 /* Save off the current value of register 0x2F5B to be restored at
161 * the end of this routine. */
162 ret_val = e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data);
163
164 /* Disabled the PHY transmitter */
165 e1000_write_phy_reg(hw, 0x2F5B, 0x0003);
166 msleep(20);
167
168 e1000_write_phy_reg(hw, 0x0000, 0x0140);
169 msleep(5);
170
171 switch (hw->mac_type) {
172 case e1000_82541:
173 case e1000_82547:
174 e1000_write_phy_reg(hw, 0x1F95, 0x0001);
175 e1000_write_phy_reg(hw, 0x1F71, 0xBD21);
176 e1000_write_phy_reg(hw, 0x1F79, 0x0018);
177 e1000_write_phy_reg(hw, 0x1F30, 0x1600);
178 e1000_write_phy_reg(hw, 0x1F31, 0x0014);
179 e1000_write_phy_reg(hw, 0x1F32, 0x161C);
180 e1000_write_phy_reg(hw, 0x1F94, 0x0003);
181 e1000_write_phy_reg(hw, 0x1F96, 0x003F);
182 e1000_write_phy_reg(hw, 0x2010, 0x0008);
183 break;
184
185 case e1000_82541_rev_2:
186 case e1000_82547_rev_2:
187 e1000_write_phy_reg(hw, 0x1F73, 0x0099);
188 break;
189 default:
190 break;
191 }
192
193 e1000_write_phy_reg(hw, 0x0000, 0x3300);
194 msleep(20);
195
196 /* Now enable the transmitter */
197 e1000_write_phy_reg(hw, 0x2F5B, phy_saved_data);
198
199 if (hw->mac_type == e1000_82547) {
200 u16 fused, fine, coarse;
201
202 /* Move to analog registers page */
203 e1000_read_phy_reg(hw,
204 IGP01E1000_ANALOG_SPARE_FUSE_STATUS,
205 &fused);
206
207 if (!(fused & IGP01E1000_ANALOG_SPARE_FUSE_ENABLED)) {
208 e1000_read_phy_reg(hw,
209 IGP01E1000_ANALOG_FUSE_STATUS,
210 &fused);
211
212 fine = fused & IGP01E1000_ANALOG_FUSE_FINE_MASK;
213 coarse =
214 fused & IGP01E1000_ANALOG_FUSE_COARSE_MASK;
215
216 if (coarse >
217 IGP01E1000_ANALOG_FUSE_COARSE_THRESH) {
218 coarse -=
219 IGP01E1000_ANALOG_FUSE_COARSE_10;
220 fine -= IGP01E1000_ANALOG_FUSE_FINE_1;
221 } else if (coarse ==
222 IGP01E1000_ANALOG_FUSE_COARSE_THRESH)
223 fine -= IGP01E1000_ANALOG_FUSE_FINE_10;
224
225 fused =
226 (fused & IGP01E1000_ANALOG_FUSE_POLY_MASK) |
227 (fine & IGP01E1000_ANALOG_FUSE_FINE_MASK) |
228 (coarse &
229 IGP01E1000_ANALOG_FUSE_COARSE_MASK);
230
231 e1000_write_phy_reg(hw,
232 IGP01E1000_ANALOG_FUSE_CONTROL,
233 fused);
234 e1000_write_phy_reg(hw,
235 IGP01E1000_ANALOG_FUSE_BYPASS,
236 IGP01E1000_ANALOG_FUSE_ENABLE_SW_CONTROL);
237 }
238 }
239 }
240 }
241
242 /**
243 * e1000_set_mac_type - Set the mac type member in the hw struct.
244 * @hw: Struct containing variables accessed by shared code
245 */
246 s32 e1000_set_mac_type(struct e1000_hw *hw)
247 {
248 e_dbg("e1000_set_mac_type");
249
250 switch (hw->device_id) {
251 case E1000_DEV_ID_82542:
252 switch (hw->revision_id) {
253 case E1000_82542_2_0_REV_ID:
254 hw->mac_type = e1000_82542_rev2_0;
255 break;
256 case E1000_82542_2_1_REV_ID:
257 hw->mac_type = e1000_82542_rev2_1;
258 break;
259 default:
260 /* Invalid 82542 revision ID */
261 return -E1000_ERR_MAC_TYPE;
262 }
263 break;
264 case E1000_DEV_ID_82543GC_FIBER:
265 case E1000_DEV_ID_82543GC_COPPER:
266 hw->mac_type = e1000_82543;
267 break;
268 case E1000_DEV_ID_82544EI_COPPER:
269 case E1000_DEV_ID_82544EI_FIBER:
270 case E1000_DEV_ID_82544GC_COPPER:
271 case E1000_DEV_ID_82544GC_LOM:
272 hw->mac_type = e1000_82544;
273 break;
274 case E1000_DEV_ID_82540EM:
275 case E1000_DEV_ID_82540EM_LOM:
276 case E1000_DEV_ID_82540EP:
277 case E1000_DEV_ID_82540EP_LOM:
278 case E1000_DEV_ID_82540EP_LP:
279 hw->mac_type = e1000_82540;
280 break;
281 case E1000_DEV_ID_82545EM_COPPER:
282 case E1000_DEV_ID_82545EM_FIBER:
283 hw->mac_type = e1000_82545;
284 break;
285 case E1000_DEV_ID_82545GM_COPPER:
286 case E1000_DEV_ID_82545GM_FIBER:
287 case E1000_DEV_ID_82545GM_SERDES:
288 hw->mac_type = e1000_82545_rev_3;
289 break;
290 case E1000_DEV_ID_82546EB_COPPER:
291 case E1000_DEV_ID_82546EB_FIBER:
292 case E1000_DEV_ID_82546EB_QUAD_COPPER:
293 hw->mac_type = e1000_82546;
294 break;
295 case E1000_DEV_ID_82546GB_COPPER:
296 case E1000_DEV_ID_82546GB_FIBER:
297 case E1000_DEV_ID_82546GB_SERDES:
298 case E1000_DEV_ID_82546GB_PCIE:
299 case E1000_DEV_ID_82546GB_QUAD_COPPER:
300 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
301 hw->mac_type = e1000_82546_rev_3;
302 break;
303 case E1000_DEV_ID_82541EI:
304 case E1000_DEV_ID_82541EI_MOBILE:
305 case E1000_DEV_ID_82541ER_LOM:
306 hw->mac_type = e1000_82541;
307 break;
308 case E1000_DEV_ID_82541ER:
309 case E1000_DEV_ID_82541GI:
310 case E1000_DEV_ID_82541GI_LF:
311 case E1000_DEV_ID_82541GI_MOBILE:
312 hw->mac_type = e1000_82541_rev_2;
313 break;
314 case E1000_DEV_ID_82547EI:
315 case E1000_DEV_ID_82547EI_MOBILE:
316 hw->mac_type = e1000_82547;
317 break;
318 case E1000_DEV_ID_82547GI:
319 hw->mac_type = e1000_82547_rev_2;
320 break;
321 default:
322 /* Should never have loaded on this device */
323 return -E1000_ERR_MAC_TYPE;
324 }
325
326 switch (hw->mac_type) {
327 case e1000_82541:
328 case e1000_82547:
329 case e1000_82541_rev_2:
330 case e1000_82547_rev_2:
331 hw->asf_firmware_present = true;
332 break;
333 default:
334 break;
335 }
336
337 /* The 82543 chip does not count tx_carrier_errors properly in
338 * FD mode
339 */
340 if (hw->mac_type == e1000_82543)
341 hw->bad_tx_carr_stats_fd = true;
342
343 if (hw->mac_type > e1000_82544)
344 hw->has_smbus = true;
345
346 return E1000_SUCCESS;
347 }
348
349 /**
350 * e1000_set_media_type - Set media type and TBI compatibility.
351 * @hw: Struct containing variables accessed by shared code
352 */
353 void e1000_set_media_type(struct e1000_hw *hw)
354 {
355 u32 status;
356
357 e_dbg("e1000_set_media_type");
358
359 if (hw->mac_type != e1000_82543) {
360 /* tbi_compatibility is only valid on 82543 */
361 hw->tbi_compatibility_en = false;
362 }
363
364 switch (hw->device_id) {
365 case E1000_DEV_ID_82545GM_SERDES:
366 case E1000_DEV_ID_82546GB_SERDES:
367 hw->media_type = e1000_media_type_internal_serdes;
368 break;
369 default:
370 switch (hw->mac_type) {
371 case e1000_82542_rev2_0:
372 case e1000_82542_rev2_1:
373 hw->media_type = e1000_media_type_fiber;
374 break;
375 default:
376 status = er32(STATUS);
377 if (status & E1000_STATUS_TBIMODE) {
378 hw->media_type = e1000_media_type_fiber;
379 /* tbi_compatibility not valid on fiber */
380 hw->tbi_compatibility_en = false;
381 } else {
382 hw->media_type = e1000_media_type_copper;
383 }
384 break;
385 }
386 }
387 }
388
389 /**
390 * e1000_reset_hw: reset the hardware completely
391 * @hw: Struct containing variables accessed by shared code
392 *
393 * Reset the transmit and receive units; mask and clear all interrupts.
394 */
395 s32 e1000_reset_hw(struct e1000_hw *hw)
396 {
397 u32 ctrl;
398 u32 ctrl_ext;
399 u32 icr;
400 u32 manc;
401 u32 led_ctrl;
402 s32 ret_val;
403
404 e_dbg("e1000_reset_hw");
405
406 /* For 82542 (rev 2.0), disable MWI before issuing a device reset */
407 if (hw->mac_type == e1000_82542_rev2_0) {
408 e_dbg("Disabling MWI on 82542 rev 2.0\n");
409 e1000_pci_clear_mwi(hw);
410 }
411
412 /* Clear interrupt mask to stop board from generating interrupts */
413 e_dbg("Masking off all interrupts\n");
414 ew32(IMC, 0xffffffff);
415
416 /* Disable the Transmit and Receive units. Then delay to allow
417 * any pending transactions to complete before we hit the MAC with
418 * the global reset.
419 */
420 ew32(RCTL, 0);
421 ew32(TCTL, E1000_TCTL_PSP);
422 E1000_WRITE_FLUSH();
423
424 /* The tbi_compatibility_on Flag must be cleared when Rctl is cleared. */
425 hw->tbi_compatibility_on = false;
426
427 /* Delay to allow any outstanding PCI transactions to complete before
428 * resetting the device
429 */
430 msleep(10);
431
432 ctrl = er32(CTRL);
433
434 /* Must reset the PHY before resetting the MAC */
435 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) {
436 ew32(CTRL, (ctrl | E1000_CTRL_PHY_RST));
437 msleep(5);
438 }
439
440 /* Issue a global reset to the MAC. This will reset the chip's
441 * transmit, receive, DMA, and link units. It will not effect
442 * the current PCI configuration. The global reset bit is self-
443 * clearing, and should clear within a microsecond.
444 */
445 e_dbg("Issuing a global reset to MAC\n");
446
447 switch (hw->mac_type) {
448 case e1000_82544:
449 case e1000_82540:
450 case e1000_82545:
451 case e1000_82546:
452 case e1000_82541:
453 case e1000_82541_rev_2:
454 /* These controllers can't ack the 64-bit write when issuing the
455 * reset, so use IO-mapping as a workaround to issue the reset */
456 E1000_WRITE_REG_IO(hw, CTRL, (ctrl | E1000_CTRL_RST));
457 break;
458 case e1000_82545_rev_3:
459 case e1000_82546_rev_3:
460 /* Reset is performed on a shadow of the control register */
461 ew32(CTRL_DUP, (ctrl | E1000_CTRL_RST));
462 break;
463 default:
464 ew32(CTRL, (ctrl | E1000_CTRL_RST));
465 break;
466 }
467
468 /* After MAC reset, force reload of EEPROM to restore power-on settings to
469 * device. Later controllers reload the EEPROM automatically, so just wait
470 * for reload to complete.
471 */
472 switch (hw->mac_type) {
473 case e1000_82542_rev2_0:
474 case e1000_82542_rev2_1:
475 case e1000_82543:
476 case e1000_82544:
477 /* Wait for reset to complete */
478 udelay(10);
479 ctrl_ext = er32(CTRL_EXT);
480 ctrl_ext |= E1000_CTRL_EXT_EE_RST;
481 ew32(CTRL_EXT, ctrl_ext);
482 E1000_WRITE_FLUSH();
483 /* Wait for EEPROM reload */
484 msleep(2);
485 break;
486 case e1000_82541:
487 case e1000_82541_rev_2:
488 case e1000_82547:
489 case e1000_82547_rev_2:
490 /* Wait for EEPROM reload */
491 msleep(20);
492 break;
493 default:
494 /* Auto read done will delay 5ms or poll based on mac type */
495 ret_val = e1000_get_auto_rd_done(hw);
496 if (ret_val)
497 return ret_val;
498 break;
499 }
500
501 /* Disable HW ARPs on ASF enabled adapters */
502 if (hw->mac_type >= e1000_82540) {
503 manc = er32(MANC);
504 manc &= ~(E1000_MANC_ARP_EN);
505 ew32(MANC, manc);
506 }
507
508 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) {
509 e1000_phy_init_script(hw);
510
511 /* Configure activity LED after PHY reset */
512 led_ctrl = er32(LEDCTL);
513 led_ctrl &= IGP_ACTIVITY_LED_MASK;
514 led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE);
515 ew32(LEDCTL, led_ctrl);
516 }
517
518 /* Clear interrupt mask to stop board from generating interrupts */
519 e_dbg("Masking off all interrupts\n");
520 ew32(IMC, 0xffffffff);
521
522 /* Clear any pending interrupt events. */
523 icr = er32(ICR);
524
525 /* If MWI was previously enabled, reenable it. */
526 if (hw->mac_type == e1000_82542_rev2_0) {
527 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
528 e1000_pci_set_mwi(hw);
529 }
530
531 return E1000_SUCCESS;
532 }
533
534 /**
535 * e1000_init_hw: Performs basic configuration of the adapter.
536 * @hw: Struct containing variables accessed by shared code
537 *
538 * Assumes that the controller has previously been reset and is in a
539 * post-reset uninitialized state. Initializes the receive address registers,
540 * multicast table, and VLAN filter table. Calls routines to setup link
541 * configuration and flow control settings. Clears all on-chip counters. Leaves
542 * the transmit and receive units disabled and uninitialized.
543 */
544 s32 e1000_init_hw(struct e1000_hw *hw)
545 {
546 u32 ctrl;
547 u32 i;
548 s32 ret_val;
549 u32 mta_size;
550 u32 ctrl_ext;
551
552 e_dbg("e1000_init_hw");
553
554 /* Initialize Identification LED */
555 ret_val = e1000_id_led_init(hw);
556 if (ret_val) {
557 e_dbg("Error Initializing Identification LED\n");
558 return ret_val;
559 }
560
561 /* Set the media type and TBI compatibility */
562 e1000_set_media_type(hw);
563
564 /* Disabling VLAN filtering. */
565 e_dbg("Initializing the IEEE VLAN\n");
566 if (hw->mac_type < e1000_82545_rev_3)
567 ew32(VET, 0);
568 e1000_clear_vfta(hw);
569
570 /* For 82542 (rev 2.0), disable MWI and put the receiver into reset */
571 if (hw->mac_type == e1000_82542_rev2_0) {
572 e_dbg("Disabling MWI on 82542 rev 2.0\n");
573 e1000_pci_clear_mwi(hw);
574 ew32(RCTL, E1000_RCTL_RST);
575 E1000_WRITE_FLUSH();
576 msleep(5);
577 }
578
579 /* Setup the receive address. This involves initializing all of the Receive
580 * Address Registers (RARs 0 - 15).
581 */
582 e1000_init_rx_addrs(hw);
583
584 /* For 82542 (rev 2.0), take the receiver out of reset and enable MWI */
585 if (hw->mac_type == e1000_82542_rev2_0) {
586 ew32(RCTL, 0);
587 E1000_WRITE_FLUSH();
588 msleep(1);
589 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
590 e1000_pci_set_mwi(hw);
591 }
592
593 /* Zero out the Multicast HASH table */
594 e_dbg("Zeroing the MTA\n");
595 mta_size = E1000_MC_TBL_SIZE;
596 for (i = 0; i < mta_size; i++) {
597 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
598 /* use write flush to prevent Memory Write Block (MWB) from
599 * occurring when accessing our register space */
600 E1000_WRITE_FLUSH();
601 }
602
603 /* Set the PCI priority bit correctly in the CTRL register. This
604 * determines if the adapter gives priority to receives, or if it
605 * gives equal priority to transmits and receives. Valid only on
606 * 82542 and 82543 silicon.
607 */
608 if (hw->dma_fairness && hw->mac_type <= e1000_82543) {
609 ctrl = er32(CTRL);
610 ew32(CTRL, ctrl | E1000_CTRL_PRIOR);
611 }
612
613 switch (hw->mac_type) {
614 case e1000_82545_rev_3:
615 case e1000_82546_rev_3:
616 break;
617 default:
618 /* Workaround for PCI-X problem when BIOS sets MMRBC incorrectly. */
619 if (hw->bus_type == e1000_bus_type_pcix
620 && e1000_pcix_get_mmrbc(hw) > 2048)
621 e1000_pcix_set_mmrbc(hw, 2048);
622 break;
623 }
624
625 /* Call a subroutine to configure the link and setup flow control. */
626 ret_val = e1000_setup_link(hw);
627
628 /* Set the transmit descriptor write-back policy */
629 if (hw->mac_type > e1000_82544) {
630 ctrl = er32(TXDCTL);
631 ctrl =
632 (ctrl & ~E1000_TXDCTL_WTHRESH) |
633 E1000_TXDCTL_FULL_TX_DESC_WB;
634 ew32(TXDCTL, ctrl);
635 }
636
637 /* Clear all of the statistics registers (clear on read). It is
638 * important that we do this after we have tried to establish link
639 * because the symbol error count will increment wildly if there
640 * is no link.
641 */
642 e1000_clear_hw_cntrs(hw);
643
644 if (hw->device_id == E1000_DEV_ID_82546GB_QUAD_COPPER ||
645 hw->device_id == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3) {
646 ctrl_ext = er32(CTRL_EXT);
647 /* Relaxed ordering must be disabled to avoid a parity
648 * error crash in a PCI slot. */
649 ctrl_ext |= E1000_CTRL_EXT_RO_DIS;
650 ew32(CTRL_EXT, ctrl_ext);
651 }
652
653 return ret_val;
654 }
655
656 /**
657 * e1000_adjust_serdes_amplitude - Adjust SERDES output amplitude based on EEPROM setting.
658 * @hw: Struct containing variables accessed by shared code.
659 */
660 static s32 e1000_adjust_serdes_amplitude(struct e1000_hw *hw)
661 {
662 u16 eeprom_data;
663 s32 ret_val;
664
665 e_dbg("e1000_adjust_serdes_amplitude");
666
667 if (hw->media_type != e1000_media_type_internal_serdes)
668 return E1000_SUCCESS;
669
670 switch (hw->mac_type) {
671 case e1000_82545_rev_3:
672 case e1000_82546_rev_3:
673 break;
674 default:
675 return E1000_SUCCESS;
676 }
677
678 ret_val = e1000_read_eeprom(hw, EEPROM_SERDES_AMPLITUDE, 1,
679 &eeprom_data);
680 if (ret_val) {
681 return ret_val;
682 }
683
684 if (eeprom_data != EEPROM_RESERVED_WORD) {
685 /* Adjust SERDES output amplitude only. */
686 eeprom_data &= EEPROM_SERDES_AMPLITUDE_MASK;
687 ret_val =
688 e1000_write_phy_reg(hw, M88E1000_PHY_EXT_CTRL, eeprom_data);
689 if (ret_val)
690 return ret_val;
691 }
692
693 return E1000_SUCCESS;
694 }
695
696 /**
697 * e1000_setup_link - Configures flow control and link settings.
698 * @hw: Struct containing variables accessed by shared code
699 *
700 * Determines which flow control settings to use. Calls the appropriate media-
701 * specific link configuration function. Configures the flow control settings.
702 * Assuming the adapter has a valid link partner, a valid link should be
703 * established. Assumes the hardware has previously been reset and the
704 * transmitter and receiver are not enabled.
705 */
706 s32 e1000_setup_link(struct e1000_hw *hw)
707 {
708 u32 ctrl_ext;
709 s32 ret_val;
710 u16 eeprom_data;
711
712 e_dbg("e1000_setup_link");
713
714 /* Read and store word 0x0F of the EEPROM. This word contains bits
715 * that determine the hardware's default PAUSE (flow control) mode,
716 * a bit that determines whether the HW defaults to enabling or
717 * disabling auto-negotiation, and the direction of the
718 * SW defined pins. If there is no SW over-ride of the flow
719 * control setting, then the variable hw->fc will
720 * be initialized based on a value in the EEPROM.
721 */
722 if (hw->fc == E1000_FC_DEFAULT) {
723 ret_val = e1000_read_eeprom(hw, EEPROM_INIT_CONTROL2_REG,
724 1, &eeprom_data);
725 if (ret_val) {
726 e_dbg("EEPROM Read Error\n");
727 return -E1000_ERR_EEPROM;
728 }
729 if ((eeprom_data & EEPROM_WORD0F_PAUSE_MASK) == 0)
730 hw->fc = E1000_FC_NONE;
731 else if ((eeprom_data & EEPROM_WORD0F_PAUSE_MASK) ==
732 EEPROM_WORD0F_ASM_DIR)
733 hw->fc = E1000_FC_TX_PAUSE;
734 else
735 hw->fc = E1000_FC_FULL;
736 }
737
738 /* We want to save off the original Flow Control configuration just
739 * in case we get disconnected and then reconnected into a different
740 * hub or switch with different Flow Control capabilities.
741 */
742 if (hw->mac_type == e1000_82542_rev2_0)
743 hw->fc &= (~E1000_FC_TX_PAUSE);
744
745 if ((hw->mac_type < e1000_82543) && (hw->report_tx_early == 1))
746 hw->fc &= (~E1000_FC_RX_PAUSE);
747
748 hw->original_fc = hw->fc;
749
750 e_dbg("After fix-ups FlowControl is now = %x\n", hw->fc);
751
752 /* Take the 4 bits from EEPROM word 0x0F that determine the initial
753 * polarity value for the SW controlled pins, and setup the
754 * Extended Device Control reg with that info.
755 * This is needed because one of the SW controlled pins is used for
756 * signal detection. So this should be done before e1000_setup_pcs_link()
757 * or e1000_phy_setup() is called.
758 */
759 if (hw->mac_type == e1000_82543) {
760 ret_val = e1000_read_eeprom(hw, EEPROM_INIT_CONTROL2_REG,
761 1, &eeprom_data);
762 if (ret_val) {
763 e_dbg("EEPROM Read Error\n");
764 return -E1000_ERR_EEPROM;
765 }
766 ctrl_ext = ((eeprom_data & EEPROM_WORD0F_SWPDIO_EXT) <<
767 SWDPIO__EXT_SHIFT);
768 ew32(CTRL_EXT, ctrl_ext);
769 }
770
771 /* Call the necessary subroutine to configure the link. */
772 ret_val = (hw->media_type == e1000_media_type_copper) ?
773 e1000_setup_copper_link(hw) : e1000_setup_fiber_serdes_link(hw);
774
775 /* Initialize the flow control address, type, and PAUSE timer
776 * registers to their default values. This is done even if flow
777 * control is disabled, because it does not hurt anything to
778 * initialize these registers.
779 */
780 e_dbg("Initializing the Flow Control address, type and timer regs\n");
781
782 ew32(FCT, FLOW_CONTROL_TYPE);
783 ew32(FCAH, FLOW_CONTROL_ADDRESS_HIGH);
784 ew32(FCAL, FLOW_CONTROL_ADDRESS_LOW);
785
786 ew32(FCTTV, hw->fc_pause_time);
787
788 /* Set the flow control receive threshold registers. Normally,
789 * these registers will be set to a default threshold that may be
790 * adjusted later by the driver's runtime code. However, if the
791 * ability to transmit pause frames in not enabled, then these
792 * registers will be set to 0.
793 */
794 if (!(hw->fc & E1000_FC_TX_PAUSE)) {
795 ew32(FCRTL, 0);
796 ew32(FCRTH, 0);
797 } else {
798 /* We need to set up the Receive Threshold high and low water marks
799 * as well as (optionally) enabling the transmission of XON frames.
800 */
801 if (hw->fc_send_xon) {
802 ew32(FCRTL, (hw->fc_low_water | E1000_FCRTL_XONE));
803 ew32(FCRTH, hw->fc_high_water);
804 } else {
805 ew32(FCRTL, hw->fc_low_water);
806 ew32(FCRTH, hw->fc_high_water);
807 }
808 }
809 return ret_val;
810 }
811
812 /**
813 * e1000_setup_fiber_serdes_link - prepare fiber or serdes link
814 * @hw: Struct containing variables accessed by shared code
815 *
816 * Manipulates Physical Coding Sublayer functions in order to configure
817 * link. Assumes the hardware has been previously reset and the transmitter
818 * and receiver are not enabled.
819 */
820 static s32 e1000_setup_fiber_serdes_link(struct e1000_hw *hw)
821 {
822 u32 ctrl;
823 u32 status;
824 u32 txcw = 0;
825 u32 i;
826 u32 signal = 0;
827 s32 ret_val;
828
829 e_dbg("e1000_setup_fiber_serdes_link");
830
831 /* On adapters with a MAC newer than 82544, SWDP 1 will be
832 * set when the optics detect a signal. On older adapters, it will be
833 * cleared when there is a signal. This applies to fiber media only.
834 * If we're on serdes media, adjust the output amplitude to value
835 * set in the EEPROM.
836 */
837 ctrl = er32(CTRL);
838 if (hw->media_type == e1000_media_type_fiber)
839 signal = (hw->mac_type > e1000_82544) ? E1000_CTRL_SWDPIN1 : 0;
840
841 ret_val = e1000_adjust_serdes_amplitude(hw);
842 if (ret_val)
843 return ret_val;
844
845 /* Take the link out of reset */
846 ctrl &= ~(E1000_CTRL_LRST);
847
848 /* Adjust VCO speed to improve BER performance */
849 ret_val = e1000_set_vco_speed(hw);
850 if (ret_val)
851 return ret_val;
852
853 e1000_config_collision_dist(hw);
854
855 /* Check for a software override of the flow control settings, and setup
856 * the device accordingly. If auto-negotiation is enabled, then software
857 * will have to set the "PAUSE" bits to the correct value in the Tranmsit
858 * Config Word Register (TXCW) and re-start auto-negotiation. However, if
859 * auto-negotiation is disabled, then software will have to manually
860 * configure the two flow control enable bits in the CTRL register.
861 *
862 * The possible values of the "fc" parameter are:
863 * 0: Flow control is completely disabled
864 * 1: Rx flow control is enabled (we can receive pause frames, but
865 * not send pause frames).
866 * 2: Tx flow control is enabled (we can send pause frames but we do
867 * not support receiving pause frames).
868 * 3: Both Rx and TX flow control (symmetric) are enabled.
869 */
870 switch (hw->fc) {
871 case E1000_FC_NONE:
872 /* Flow control is completely disabled by a software over-ride. */
873 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD);
874 break;
875 case E1000_FC_RX_PAUSE:
876 /* RX Flow control is enabled and TX Flow control is disabled by a
877 * software over-ride. Since there really isn't a way to advertise
878 * that we are capable of RX Pause ONLY, we will advertise that we
879 * support both symmetric and asymmetric RX PAUSE. Later, we will
880 * disable the adapter's ability to send PAUSE frames.
881 */
882 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK);
883 break;
884 case E1000_FC_TX_PAUSE:
885 /* TX Flow control is enabled, and RX Flow control is disabled, by a
886 * software over-ride.
887 */
888 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_ASM_DIR);
889 break;
890 case E1000_FC_FULL:
891 /* Flow control (both RX and TX) is enabled by a software over-ride. */
892 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK);
893 break;
894 default:
895 e_dbg("Flow control param set incorrectly\n");
896 return -E1000_ERR_CONFIG;
897 break;
898 }
899
900 /* Since auto-negotiation is enabled, take the link out of reset (the link
901 * will be in reset, because we previously reset the chip). This will
902 * restart auto-negotiation. If auto-negotiation is successful then the
903 * link-up status bit will be set and the flow control enable bits (RFCE
904 * and TFCE) will be set according to their negotiated value.
905 */
906 e_dbg("Auto-negotiation enabled\n");
907
908 ew32(TXCW, txcw);
909 ew32(CTRL, ctrl);
910 E1000_WRITE_FLUSH();
911
912 hw->txcw = txcw;
913 msleep(1);
914
915 /* If we have a signal (the cable is plugged in) then poll for a "Link-Up"
916 * indication in the Device Status Register. Time-out if a link isn't
917 * seen in 500 milliseconds seconds (Auto-negotiation should complete in
918 * less than 500 milliseconds even if the other end is doing it in SW).
919 * For internal serdes, we just assume a signal is present, then poll.
920 */
921 if (hw->media_type == e1000_media_type_internal_serdes ||
922 (er32(CTRL) & E1000_CTRL_SWDPIN1) == signal) {
923 e_dbg("Looking for Link\n");
924 for (i = 0; i < (LINK_UP_TIMEOUT / 10); i++) {
925 msleep(10);
926 status = er32(STATUS);
927 if (status & E1000_STATUS_LU)
928 break;
929 }
930 if (i == (LINK_UP_TIMEOUT / 10)) {
931 e_dbg("Never got a valid link from auto-neg!!!\n");
932 hw->autoneg_failed = 1;
933 /* AutoNeg failed to achieve a link, so we'll call
934 * e1000_check_for_link. This routine will force the link up if
935 * we detect a signal. This will allow us to communicate with
936 * non-autonegotiating link partners.
937 */
938 ret_val = e1000_check_for_link(hw);
939 if (ret_val) {
940 e_dbg("Error while checking for link\n");
941 return ret_val;
942 }
943 hw->autoneg_failed = 0;
944 } else {
945 hw->autoneg_failed = 0;
946 e_dbg("Valid Link Found\n");
947 }
948 } else {
949 e_dbg("No Signal Detected\n");
950 }
951 return E1000_SUCCESS;
952 }
953
954 /**
955 * e1000_copper_link_preconfig - early configuration for copper
956 * @hw: Struct containing variables accessed by shared code
957 *
958 * Make sure we have a valid PHY and change PHY mode before link setup.
959 */
960 static s32 e1000_copper_link_preconfig(struct e1000_hw *hw)
961 {
962 u32 ctrl;
963 s32 ret_val;
964 u16 phy_data;
965
966 e_dbg("e1000_copper_link_preconfig");
967
968 ctrl = er32(CTRL);
969 /* With 82543, we need to force speed and duplex on the MAC equal to what
970 * the PHY speed and duplex configuration is. In addition, we need to
971 * perform a hardware reset on the PHY to take it out of reset.
972 */
973 if (hw->mac_type > e1000_82543) {
974 ctrl |= E1000_CTRL_SLU;
975 ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
976 ew32(CTRL, ctrl);
977 } else {
978 ctrl |=
979 (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX | E1000_CTRL_SLU);
980 ew32(CTRL, ctrl);
981 ret_val = e1000_phy_hw_reset(hw);
982 if (ret_val)
983 return ret_val;
984 }
985
986 /* Make sure we have a valid PHY */
987 ret_val = e1000_detect_gig_phy(hw);
988 if (ret_val) {
989 e_dbg("Error, did not detect valid phy.\n");
990 return ret_val;
991 }
992 e_dbg("Phy ID = %x\n", hw->phy_id);
993
994 /* Set PHY to class A mode (if necessary) */
995 ret_val = e1000_set_phy_mode(hw);
996 if (ret_val)
997 return ret_val;
998
999 if ((hw->mac_type == e1000_82545_rev_3) ||
1000 (hw->mac_type == e1000_82546_rev_3)) {
1001 ret_val =
1002 e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1003 phy_data |= 0x00000008;
1004 ret_val =
1005 e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1006 }
1007
1008 if (hw->mac_type <= e1000_82543 ||
1009 hw->mac_type == e1000_82541 || hw->mac_type == e1000_82547 ||
1010 hw->mac_type == e1000_82541_rev_2
1011 || hw->mac_type == e1000_82547_rev_2)
1012 hw->phy_reset_disable = false;
1013
1014 return E1000_SUCCESS;
1015 }
1016
1017 /**
1018 * e1000_copper_link_igp_setup - Copper link setup for e1000_phy_igp series.
1019 * @hw: Struct containing variables accessed by shared code
1020 */
1021 static s32 e1000_copper_link_igp_setup(struct e1000_hw *hw)
1022 {
1023 u32 led_ctrl;
1024 s32 ret_val;
1025 u16 phy_data;
1026
1027 e_dbg("e1000_copper_link_igp_setup");
1028
1029 if (hw->phy_reset_disable)
1030 return E1000_SUCCESS;
1031
1032 ret_val = e1000_phy_reset(hw);
1033 if (ret_val) {
1034 e_dbg("Error Resetting the PHY\n");
1035 return ret_val;
1036 }
1037
1038 /* Wait 15ms for MAC to configure PHY from eeprom settings */
1039 msleep(15);
1040 /* Configure activity LED after PHY reset */
1041 led_ctrl = er32(LEDCTL);
1042 led_ctrl &= IGP_ACTIVITY_LED_MASK;
1043 led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE);
1044 ew32(LEDCTL, led_ctrl);
1045
1046 /* The NVM settings will configure LPLU in D3 for IGP2 and IGP3 PHYs */
1047 if (hw->phy_type == e1000_phy_igp) {
1048 /* disable lplu d3 during driver init */
1049 ret_val = e1000_set_d3_lplu_state(hw, false);
1050 if (ret_val) {
1051 e_dbg("Error Disabling LPLU D3\n");
1052 return ret_val;
1053 }
1054 }
1055
1056 /* Configure mdi-mdix settings */
1057 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data);
1058 if (ret_val)
1059 return ret_val;
1060
1061 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) {
1062 hw->dsp_config_state = e1000_dsp_config_disabled;
1063 /* Force MDI for earlier revs of the IGP PHY */
1064 phy_data &=
1065 ~(IGP01E1000_PSCR_AUTO_MDIX |
1066 IGP01E1000_PSCR_FORCE_MDI_MDIX);
1067 hw->mdix = 1;
1068
1069 } else {
1070 hw->dsp_config_state = e1000_dsp_config_enabled;
1071 phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX;
1072
1073 switch (hw->mdix) {
1074 case 1:
1075 phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
1076 break;
1077 case 2:
1078 phy_data |= IGP01E1000_PSCR_FORCE_MDI_MDIX;
1079 break;
1080 case 0:
1081 default:
1082 phy_data |= IGP01E1000_PSCR_AUTO_MDIX;
1083 break;
1084 }
1085 }
1086 ret_val = e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, phy_data);
1087 if (ret_val)
1088 return ret_val;
1089
1090 /* set auto-master slave resolution settings */
1091 if (hw->autoneg) {
1092 e1000_ms_type phy_ms_setting = hw->master_slave;
1093
1094 if (hw->ffe_config_state == e1000_ffe_config_active)
1095 hw->ffe_config_state = e1000_ffe_config_enabled;
1096
1097 if (hw->dsp_config_state == e1000_dsp_config_activated)
1098 hw->dsp_config_state = e1000_dsp_config_enabled;
1099
1100 /* when autonegotiation advertisement is only 1000Mbps then we
1101 * should disable SmartSpeed and enable Auto MasterSlave
1102 * resolution as hardware default. */
1103 if (hw->autoneg_advertised == ADVERTISE_1000_FULL) {
1104 /* Disable SmartSpeed */
1105 ret_val =
1106 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
1107 &phy_data);
1108 if (ret_val)
1109 return ret_val;
1110 phy_data &= ~IGP01E1000_PSCFR_SMART_SPEED;
1111 ret_val =
1112 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
1113 phy_data);
1114 if (ret_val)
1115 return ret_val;
1116 /* Set auto Master/Slave resolution process */
1117 ret_val =
1118 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_data);
1119 if (ret_val)
1120 return ret_val;
1121 phy_data &= ~CR_1000T_MS_ENABLE;
1122 ret_val =
1123 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_data);
1124 if (ret_val)
1125 return ret_val;
1126 }
1127
1128 ret_val = e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_data);
1129 if (ret_val)
1130 return ret_val;
1131
1132 /* load defaults for future use */
1133 hw->original_master_slave = (phy_data & CR_1000T_MS_ENABLE) ?
1134 ((phy_data & CR_1000T_MS_VALUE) ?
1135 e1000_ms_force_master :
1136 e1000_ms_force_slave) : e1000_ms_auto;
1137
1138 switch (phy_ms_setting) {
1139 case e1000_ms_force_master:
1140 phy_data |= (CR_1000T_MS_ENABLE | CR_1000T_MS_VALUE);
1141 break;
1142 case e1000_ms_force_slave:
1143 phy_data |= CR_1000T_MS_ENABLE;
1144 phy_data &= ~(CR_1000T_MS_VALUE);
1145 break;
1146 case e1000_ms_auto:
1147 phy_data &= ~CR_1000T_MS_ENABLE;
1148 default:
1149 break;
1150 }
1151 ret_val = e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_data);
1152 if (ret_val)
1153 return ret_val;
1154 }
1155
1156 return E1000_SUCCESS;
1157 }
1158
1159 /**
1160 * e1000_copper_link_mgp_setup - Copper link setup for e1000_phy_m88 series.
1161 * @hw: Struct containing variables accessed by shared code
1162 */
1163 static s32 e1000_copper_link_mgp_setup(struct e1000_hw *hw)
1164 {
1165 s32 ret_val;
1166 u16 phy_data;
1167
1168 e_dbg("e1000_copper_link_mgp_setup");
1169
1170 if (hw->phy_reset_disable)
1171 return E1000_SUCCESS;
1172
1173 /* Enable CRS on TX. This must be set for half-duplex operation. */
1174 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1175 if (ret_val)
1176 return ret_val;
1177
1178 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
1179
1180 /* Options:
1181 * MDI/MDI-X = 0 (default)
1182 * 0 - Auto for all speeds
1183 * 1 - MDI mode
1184 * 2 - MDI-X mode
1185 * 3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes)
1186 */
1187 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
1188
1189 switch (hw->mdix) {
1190 case 1:
1191 phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE;
1192 break;
1193 case 2:
1194 phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE;
1195 break;
1196 case 3:
1197 phy_data |= M88E1000_PSCR_AUTO_X_1000T;
1198 break;
1199 case 0:
1200 default:
1201 phy_data |= M88E1000_PSCR_AUTO_X_MODE;
1202 break;
1203 }
1204
1205 /* Options:
1206 * disable_polarity_correction = 0 (default)
1207 * Automatic Correction for Reversed Cable Polarity
1208 * 0 - Disabled
1209 * 1 - Enabled
1210 */
1211 phy_data &= ~M88E1000_PSCR_POLARITY_REVERSAL;
1212 if (hw->disable_polarity_correction == 1)
1213 phy_data |= M88E1000_PSCR_POLARITY_REVERSAL;
1214 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1215 if (ret_val)
1216 return ret_val;
1217
1218 if (hw->phy_revision < M88E1011_I_REV_4) {
1219 /* Force TX_CLK in the Extended PHY Specific Control Register
1220 * to 25MHz clock.
1221 */
1222 ret_val =
1223 e1000_read_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL,
1224 &phy_data);
1225 if (ret_val)
1226 return ret_val;
1227
1228 phy_data |= M88E1000_EPSCR_TX_CLK_25;
1229
1230 if ((hw->phy_revision == E1000_REVISION_2) &&
1231 (hw->phy_id == M88E1111_I_PHY_ID)) {
1232 /* Vidalia Phy, set the downshift counter to 5x */
1233 phy_data &= ~(M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK);
1234 phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X;
1235 ret_val = e1000_write_phy_reg(hw,
1236 M88E1000_EXT_PHY_SPEC_CTRL,
1237 phy_data);
1238 if (ret_val)
1239 return ret_val;
1240 } else {
1241 /* Configure Master and Slave downshift values */
1242 phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK |
1243 M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK);
1244 phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X |
1245 M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X);
1246 ret_val = e1000_write_phy_reg(hw,
1247 M88E1000_EXT_PHY_SPEC_CTRL,
1248 phy_data);
1249 if (ret_val)
1250 return ret_val;
1251 }
1252 }
1253
1254 /* SW Reset the PHY so all changes take effect */
1255 ret_val = e1000_phy_reset(hw);
1256 if (ret_val) {
1257 e_dbg("Error Resetting the PHY\n");
1258 return ret_val;
1259 }
1260
1261 return E1000_SUCCESS;
1262 }
1263
1264 /**
1265 * e1000_copper_link_autoneg - setup auto-neg
1266 * @hw: Struct containing variables accessed by shared code
1267 *
1268 * Setup auto-negotiation and flow control advertisements,
1269 * and then perform auto-negotiation.
1270 */
1271 static s32 e1000_copper_link_autoneg(struct e1000_hw *hw)
1272 {
1273 s32 ret_val;
1274 u16 phy_data;
1275
1276 e_dbg("e1000_copper_link_autoneg");
1277
1278 /* Perform some bounds checking on the hw->autoneg_advertised
1279 * parameter. If this variable is zero, then set it to the default.
1280 */
1281 hw->autoneg_advertised &= AUTONEG_ADVERTISE_SPEED_DEFAULT;
1282
1283 /* If autoneg_advertised is zero, we assume it was not defaulted
1284 * by the calling code so we set to advertise full capability.
1285 */
1286 if (hw->autoneg_advertised == 0)
1287 hw->autoneg_advertised = AUTONEG_ADVERTISE_SPEED_DEFAULT;
1288
1289 e_dbg("Reconfiguring auto-neg advertisement params\n");
1290 ret_val = e1000_phy_setup_autoneg(hw);
1291 if (ret_val) {
1292 e_dbg("Error Setting up Auto-Negotiation\n");
1293 return ret_val;
1294 }
1295 e_dbg("Restarting Auto-Neg\n");
1296
1297 /* Restart auto-negotiation by setting the Auto Neg Enable bit and
1298 * the Auto Neg Restart bit in the PHY control register.
1299 */
1300 ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data);
1301 if (ret_val)
1302 return ret_val;
1303
1304 phy_data |= (MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG);
1305 ret_val = e1000_write_phy_reg(hw, PHY_CTRL, phy_data);
1306 if (ret_val)
1307 return ret_val;
1308
1309 /* Does the user want to wait for Auto-Neg to complete here, or
1310 * check at a later time (for example, callback routine).
1311 */
1312 if (hw->wait_autoneg_complete) {
1313 ret_val = e1000_wait_autoneg(hw);
1314 if (ret_val) {
1315 e_dbg
1316 ("Error while waiting for autoneg to complete\n");
1317 return ret_val;
1318 }
1319 }
1320
1321 hw->get_link_status = true;
1322
1323 return E1000_SUCCESS;
1324 }
1325
1326 /**
1327 * e1000_copper_link_postconfig - post link setup
1328 * @hw: Struct containing variables accessed by shared code
1329 *
1330 * Config the MAC and the PHY after link is up.
1331 * 1) Set up the MAC to the current PHY speed/duplex
1332 * if we are on 82543. If we
1333 * are on newer silicon, we only need to configure
1334 * collision distance in the Transmit Control Register.
1335 * 2) Set up flow control on the MAC to that established with
1336 * the link partner.
1337 * 3) Config DSP to improve Gigabit link quality for some PHY revisions.
1338 */
1339 static s32 e1000_copper_link_postconfig(struct e1000_hw *hw)
1340 {
1341 s32 ret_val;
1342 e_dbg("e1000_copper_link_postconfig");
1343
1344 if (hw->mac_type >= e1000_82544) {
1345 e1000_config_collision_dist(hw);
1346 } else {
1347 ret_val = e1000_config_mac_to_phy(hw);
1348 if (ret_val) {
1349 e_dbg("Error configuring MAC to PHY settings\n");
1350 return ret_val;
1351 }
1352 }
1353 ret_val = e1000_config_fc_after_link_up(hw);
1354 if (ret_val) {
1355 e_dbg("Error Configuring Flow Control\n");
1356 return ret_val;
1357 }
1358
1359 /* Config DSP to improve Giga link quality */
1360 if (hw->phy_type == e1000_phy_igp) {
1361 ret_val = e1000_config_dsp_after_link_change(hw, true);
1362 if (ret_val) {
1363 e_dbg("Error Configuring DSP after link up\n");
1364 return ret_val;
1365 }
1366 }
1367
1368 return E1000_SUCCESS;
1369 }
1370
1371 /**
1372 * e1000_setup_copper_link - phy/speed/duplex setting
1373 * @hw: Struct containing variables accessed by shared code
1374 *
1375 * Detects which PHY is present and sets up the speed and duplex
1376 */
1377 static s32 e1000_setup_copper_link(struct e1000_hw *hw)
1378 {
1379 s32 ret_val;
1380 u16 i;
1381 u16 phy_data;
1382
1383 e_dbg("e1000_setup_copper_link");
1384
1385 /* Check if it is a valid PHY and set PHY mode if necessary. */
1386 ret_val = e1000_copper_link_preconfig(hw);
1387 if (ret_val)
1388 return ret_val;
1389
1390 if (hw->phy_type == e1000_phy_igp) {
1391 ret_val = e1000_copper_link_igp_setup(hw);
1392 if (ret_val)
1393 return ret_val;
1394 } else if (hw->phy_type == e1000_phy_m88) {
1395 ret_val = e1000_copper_link_mgp_setup(hw);
1396 if (ret_val)
1397 return ret_val;
1398 }
1399
1400 if (hw->autoneg) {
1401 /* Setup autoneg and flow control advertisement
1402 * and perform autonegotiation */
1403 ret_val = e1000_copper_link_autoneg(hw);
1404 if (ret_val)
1405 return ret_val;
1406 } else {
1407 /* PHY will be set to 10H, 10F, 100H,or 100F
1408 * depending on value from forced_speed_duplex. */
1409 e_dbg("Forcing speed and duplex\n");
1410 ret_val = e1000_phy_force_speed_duplex(hw);
1411 if (ret_val) {
1412 e_dbg("Error Forcing Speed and Duplex\n");
1413 return ret_val;
1414 }
1415 }
1416
1417 /* Check link status. Wait up to 100 microseconds for link to become
1418 * valid.
1419 */
1420 for (i = 0; i < 10; i++) {
1421 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
1422 if (ret_val)
1423 return ret_val;
1424 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
1425 if (ret_val)
1426 return ret_val;
1427
1428 if (phy_data & MII_SR_LINK_STATUS) {
1429 /* Config the MAC and PHY after link is up */
1430 ret_val = e1000_copper_link_postconfig(hw);
1431 if (ret_val)
1432 return ret_val;
1433
1434 e_dbg("Valid link established!!!\n");
1435 return E1000_SUCCESS;
1436 }
1437 udelay(10);
1438 }
1439
1440 e_dbg("Unable to establish link!!!\n");
1441 return E1000_SUCCESS;
1442 }
1443
1444 /**
1445 * e1000_phy_setup_autoneg - phy settings
1446 * @hw: Struct containing variables accessed by shared code
1447 *
1448 * Configures PHY autoneg and flow control advertisement settings
1449 */
1450 s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
1451 {
1452 s32 ret_val;
1453 u16 mii_autoneg_adv_reg;
1454 u16 mii_1000t_ctrl_reg;
1455
1456 e_dbg("e1000_phy_setup_autoneg");
1457
1458 /* Read the MII Auto-Neg Advertisement Register (Address 4). */
1459 ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg);
1460 if (ret_val)
1461 return ret_val;
1462
1463 /* Read the MII 1000Base-T Control Register (Address 9). */
1464 ret_val =
1465 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &mii_1000t_ctrl_reg);
1466 if (ret_val)
1467 return ret_val;
1468
1469 /* Need to parse both autoneg_advertised and fc and set up
1470 * the appropriate PHY registers. First we will parse for
1471 * autoneg_advertised software override. Since we can advertise
1472 * a plethora of combinations, we need to check each bit
1473 * individually.
1474 */
1475
1476 /* First we clear all the 10/100 mb speed bits in the Auto-Neg
1477 * Advertisement Register (Address 4) and the 1000 mb speed bits in
1478 * the 1000Base-T Control Register (Address 9).
1479 */
1480 mii_autoneg_adv_reg &= ~REG4_SPEED_MASK;
1481 mii_1000t_ctrl_reg &= ~REG9_SPEED_MASK;
1482
1483 e_dbg("autoneg_advertised %x\n", hw->autoneg_advertised);
1484
1485 /* Do we want to advertise 10 Mb Half Duplex? */
1486 if (hw->autoneg_advertised & ADVERTISE_10_HALF) {
1487 e_dbg("Advertise 10mb Half duplex\n");
1488 mii_autoneg_adv_reg |= NWAY_AR_10T_HD_CAPS;
1489 }
1490
1491 /* Do we want to advertise 10 Mb Full Duplex? */
1492 if (hw->autoneg_advertised & ADVERTISE_10_FULL) {
1493 e_dbg("Advertise 10mb Full duplex\n");
1494 mii_autoneg_adv_reg |= NWAY_AR_10T_FD_CAPS;
1495 }
1496
1497 /* Do we want to advertise 100 Mb Half Duplex? */
1498 if (hw->autoneg_advertised & ADVERTISE_100_HALF) {
1499 e_dbg("Advertise 100mb Half duplex\n");
1500 mii_autoneg_adv_reg |= NWAY_AR_100TX_HD_CAPS;
1501 }
1502
1503 /* Do we want to advertise 100 Mb Full Duplex? */
1504 if (hw->autoneg_advertised & ADVERTISE_100_FULL) {
1505 e_dbg("Advertise 100mb Full duplex\n");
1506 mii_autoneg_adv_reg |= NWAY_AR_100TX_FD_CAPS;
1507 }
1508
1509 /* We do not allow the Phy to advertise 1000 Mb Half Duplex */
1510 if (hw->autoneg_advertised & ADVERTISE_1000_HALF) {
1511 e_dbg
1512 ("Advertise 1000mb Half duplex requested, request denied!\n");
1513 }
1514
1515 /* Do we want to advertise 1000 Mb Full Duplex? */
1516 if (hw->autoneg_advertised & ADVERTISE_1000_FULL) {
1517 e_dbg("Advertise 1000mb Full duplex\n");
1518 mii_1000t_ctrl_reg |= CR_1000T_FD_CAPS;
1519 }
1520
1521 /* Check for a software override of the flow control settings, and
1522 * setup the PHY advertisement registers accordingly. If
1523 * auto-negotiation is enabled, then software will have to set the
1524 * "PAUSE" bits to the correct value in the Auto-Negotiation
1525 * Advertisement Register (PHY_AUTONEG_ADV) and re-start auto-negotiation.
1526 *
1527 * The possible values of the "fc" parameter are:
1528 * 0: Flow control is completely disabled
1529 * 1: Rx flow control is enabled (we can receive pause frames
1530 * but not send pause frames).
1531 * 2: Tx flow control is enabled (we can send pause frames
1532 * but we do not support receiving pause frames).
1533 * 3: Both Rx and TX flow control (symmetric) are enabled.
1534 * other: No software override. The flow control configuration
1535 * in the EEPROM is used.
1536 */
1537 switch (hw->fc) {
1538 case E1000_FC_NONE: /* 0 */
1539 /* Flow control (RX & TX) is completely disabled by a
1540 * software over-ride.
1541 */
1542 mii_autoneg_adv_reg &= ~(NWAY_AR_ASM_DIR | NWAY_AR_PAUSE);
1543 break;
1544 case E1000_FC_RX_PAUSE: /* 1 */
1545 /* RX Flow control is enabled, and TX Flow control is
1546 * disabled, by a software over-ride.
1547 */
1548 /* Since there really isn't a way to advertise that we are
1549 * capable of RX Pause ONLY, we will advertise that we
1550 * support both symmetric and asymmetric RX PAUSE. Later
1551 * (in e1000_config_fc_after_link_up) we will disable the
1552 *hw's ability to send PAUSE frames.
1553 */
1554 mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE);
1555 break;
1556 case E1000_FC_TX_PAUSE: /* 2 */
1557 /* TX Flow control is enabled, and RX Flow control is
1558 * disabled, by a software over-ride.
1559 */
1560 mii_autoneg_adv_reg |= NWAY_AR_ASM_DIR;
1561 mii_autoneg_adv_reg &= ~NWAY_AR_PAUSE;
1562 break;
1563 case E1000_FC_FULL: /* 3 */
1564 /* Flow control (both RX and TX) is enabled by a software
1565 * over-ride.
1566 */
1567 mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE);
1568 break;
1569 default:
1570 e_dbg("Flow control param set incorrectly\n");
1571 return -E1000_ERR_CONFIG;
1572 }
1573
1574 ret_val = e1000_write_phy_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg);
1575 if (ret_val)
1576 return ret_val;
1577
1578 e_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);
1579
1580 ret_val = e1000_write_phy_reg(hw, PHY_1000T_CTRL, mii_1000t_ctrl_reg);
1581 if (ret_val)
1582 return ret_val;
1583
1584 return E1000_SUCCESS;
1585 }
1586
1587 /**
1588 * e1000_phy_force_speed_duplex - force link settings
1589 * @hw: Struct containing variables accessed by shared code
1590 *
1591 * Force PHY speed and duplex settings to hw->forced_speed_duplex
1592 */
1593 static s32 e1000_phy_force_speed_duplex(struct e1000_hw *hw)
1594 {
1595 u32 ctrl;
1596 s32 ret_val;
1597 u16 mii_ctrl_reg;
1598 u16 mii_status_reg;
1599 u16 phy_data;
1600 u16 i;
1601
1602 e_dbg("e1000_phy_force_speed_duplex");
1603
1604 /* Turn off Flow control if we are forcing speed and duplex. */
1605 hw->fc = E1000_FC_NONE;
1606
1607 e_dbg("hw->fc = %d\n", hw->fc);
1608
1609 /* Read the Device Control Register. */
1610 ctrl = er32(CTRL);
1611
1612 /* Set the bits to Force Speed and Duplex in the Device Ctrl Reg. */
1613 ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
1614 ctrl &= ~(DEVICE_SPEED_MASK);
1615
1616 /* Clear the Auto Speed Detect Enable bit. */
1617 ctrl &= ~E1000_CTRL_ASDE;
1618
1619 /* Read the MII Control Register. */
1620 ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &mii_ctrl_reg);
1621 if (ret_val)
1622 return ret_val;
1623
1624 /* We need to disable autoneg in order to force link and duplex. */
1625
1626 mii_ctrl_reg &= ~MII_CR_AUTO_NEG_EN;
1627
1628 /* Are we forcing Full or Half Duplex? */
1629 if (hw->forced_speed_duplex == e1000_100_full ||
1630 hw->forced_speed_duplex == e1000_10_full) {
1631 /* We want to force full duplex so we SET the full duplex bits in the
1632 * Device and MII Control Registers.
1633 */
1634 ctrl |= E1000_CTRL_FD;
1635 mii_ctrl_reg |= MII_CR_FULL_DUPLEX;
1636 e_dbg("Full Duplex\n");
1637 } else {
1638 /* We want to force half duplex so we CLEAR the full duplex bits in
1639 * the Device and MII Control Registers.
1640 */
1641 ctrl &= ~E1000_CTRL_FD;
1642 mii_ctrl_reg &= ~MII_CR_FULL_DUPLEX;
1643 e_dbg("Half Duplex\n");
1644 }
1645
1646 /* Are we forcing 100Mbps??? */
1647 if (hw->forced_speed_duplex == e1000_100_full ||
1648 hw->forced_speed_duplex == e1000_100_half) {
1649 /* Set the 100Mb bit and turn off the 1000Mb and 10Mb bits. */
1650 ctrl |= E1000_CTRL_SPD_100;
1651 mii_ctrl_reg |= MII_CR_SPEED_100;
1652 mii_ctrl_reg &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_10);
1653 e_dbg("Forcing 100mb ");
1654 } else {
1655 /* Set the 10Mb bit and turn off the 1000Mb and 100Mb bits. */
1656 ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100);
1657 mii_ctrl_reg |= MII_CR_SPEED_10;
1658 mii_ctrl_reg &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_100);
1659 e_dbg("Forcing 10mb ");
1660 }
1661
1662 e1000_config_collision_dist(hw);
1663
1664 /* Write the configured values back to the Device Control Reg. */
1665 ew32(CTRL, ctrl);
1666
1667 if (hw->phy_type == e1000_phy_m88) {
1668 ret_val =
1669 e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1670 if (ret_val)
1671 return ret_val;
1672
1673 /* Clear Auto-Crossover to force MDI manually. M88E1000 requires MDI
1674 * forced whenever speed are duplex are forced.
1675 */
1676 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
1677 ret_val =
1678 e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1679 if (ret_val)
1680 return ret_val;
1681
1682 e_dbg("M88E1000 PSCR: %x\n", phy_data);
1683
1684 /* Need to reset the PHY or these changes will be ignored */
1685 mii_ctrl_reg |= MII_CR_RESET;
1686
1687 /* Disable MDI-X support for 10/100 */
1688 } else {
1689 /* Clear Auto-Crossover to force MDI manually. IGP requires MDI
1690 * forced whenever speed or duplex are forced.
1691 */
1692 ret_val =
1693 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data);
1694 if (ret_val)
1695 return ret_val;
1696
1697 phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX;
1698 phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
1699
1700 ret_val =
1701 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, phy_data);
1702 if (ret_val)
1703 return ret_val;
1704 }
1705
1706 /* Write back the modified PHY MII control register. */
1707 ret_val = e1000_write_phy_reg(hw, PHY_CTRL, mii_ctrl_reg);
1708 if (ret_val)
1709 return ret_val;
1710
1711 udelay(1);
1712
1713 /* The wait_autoneg_complete flag may be a little misleading here.
1714 * Since we are forcing speed and duplex, Auto-Neg is not enabled.
1715 * But we do want to delay for a period while forcing only so we
1716 * don't generate false No Link messages. So we will wait here
1717 * only if the user has set wait_autoneg_complete to 1, which is
1718 * the default.
1719 */
1720 if (hw->wait_autoneg_complete) {
1721 /* We will wait for autoneg to complete. */
1722 e_dbg("Waiting for forced speed/duplex link.\n");
1723 mii_status_reg = 0;
1724
1725 /* We will wait for autoneg to complete or 4.5 seconds to expire. */
1726 for (i = PHY_FORCE_TIME; i > 0; i--) {
1727 /* Read the MII Status Register and wait for Auto-Neg Complete bit
1728 * to be set.
1729 */
1730 ret_val =
1731 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
1732 if (ret_val)
1733 return ret_val;
1734
1735 ret_val =
1736 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
1737 if (ret_val)
1738 return ret_val;
1739
1740 if (mii_status_reg & MII_SR_LINK_STATUS)
1741 break;
1742 msleep(100);
1743 }
1744 if ((i == 0) && (hw->phy_type == e1000_phy_m88)) {
1745 /* We didn't get link. Reset the DSP and wait again for link. */
1746 ret_val = e1000_phy_reset_dsp(hw);
1747 if (ret_val) {
1748 e_dbg("Error Resetting PHY DSP\n");
1749 return ret_val;
1750 }
1751 }
1752 /* This loop will early-out if the link condition has been met. */
1753 for (i = PHY_FORCE_TIME; i > 0; i--) {
1754 if (mii_status_reg & MII_SR_LINK_STATUS)
1755 break;
1756 msleep(100);
1757 /* Read the MII Status Register and wait for Auto-Neg Complete bit
1758 * to be set.
1759 */
1760 ret_val =
1761 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
1762 if (ret_val)
1763 return ret_val;
1764
1765 ret_val =
1766 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
1767 if (ret_val)
1768 return ret_val;
1769 }
1770 }
1771
1772 if (hw->phy_type == e1000_phy_m88) {
1773 /* Because we reset the PHY above, we need to re-force TX_CLK in the
1774 * Extended PHY Specific Control Register to 25MHz clock. This value
1775 * defaults back to a 2.5MHz clock when the PHY is reset.
1776 */
1777 ret_val =
1778 e1000_read_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL,
1779 &phy_data);
1780 if (ret_val)
1781 return ret_val;
1782
1783 phy_data |= M88E1000_EPSCR_TX_CLK_25;
1784 ret_val =
1785 e1000_write_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL,
1786 phy_data);
1787 if (ret_val)
1788 return ret_val;
1789
1790 /* In addition, because of the s/w reset above, we need to enable CRS on
1791 * TX. This must be set for both full and half duplex operation.
1792 */
1793 ret_val =
1794 e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1795 if (ret_val)
1796 return ret_val;
1797
1798 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
1799 ret_val =
1800 e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1801 if (ret_val)
1802 return ret_val;
1803
1804 if ((hw->mac_type == e1000_82544 || hw->mac_type == e1000_82543)
1805 && (!hw->autoneg)
1806 && (hw->forced_speed_duplex == e1000_10_full
1807 || hw->forced_speed_duplex == e1000_10_half)) {
1808 ret_val = e1000_polarity_reversal_workaround(hw);
1809 if (ret_val)
1810 return ret_val;
1811 }
1812 }
1813 return E1000_SUCCESS;
1814 }
1815
1816 /**
1817 * e1000_config_collision_dist - set collision distance register
1818 * @hw: Struct containing variables accessed by shared code
1819 *
1820 * Sets the collision distance in the Transmit Control register.
1821 * Link should have been established previously. Reads the speed and duplex
1822 * information from the Device Status register.
1823 */
1824 void e1000_config_collision_dist(struct e1000_hw *hw)
1825 {
1826 u32 tctl, coll_dist;
1827
1828 e_dbg("e1000_config_collision_dist");
1829
1830 if (hw->mac_type < e1000_82543)
1831 coll_dist = E1000_COLLISION_DISTANCE_82542;
1832 else
1833 coll_dist = E1000_COLLISION_DISTANCE;
1834
1835 tctl = er32(TCTL);
1836
1837 tctl &= ~E1000_TCTL_COLD;
1838 tctl |= coll_dist << E1000_COLD_SHIFT;
1839
1840 ew32(TCTL, tctl);
1841 E1000_WRITE_FLUSH();
1842 }
1843
1844 /**
1845 * e1000_config_mac_to_phy - sync phy and mac settings
1846 * @hw: Struct containing variables accessed by shared code
1847 * @mii_reg: data to write to the MII control register
1848 *
1849 * Sets MAC speed and duplex settings to reflect the those in the PHY
1850 * The contents of the PHY register containing the needed information need to
1851 * be passed in.
1852 */
1853 static s32 e1000_config_mac_to_phy(struct e1000_hw *hw)
1854 {
1855 u32 ctrl;
1856 s32 ret_val;
1857 u16 phy_data;
1858
1859 e_dbg("e1000_config_mac_to_phy");
1860
1861 /* 82544 or newer MAC, Auto Speed Detection takes care of
1862 * MAC speed/duplex configuration.*/
1863 if (hw->mac_type >= e1000_82544)
1864 return E1000_SUCCESS;
1865
1866 /* Read the Device Control Register and set the bits to Force Speed
1867 * and Duplex.
1868 */
1869 ctrl = er32(CTRL);
1870 ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
1871 ctrl &= ~(E1000_CTRL_SPD_SEL | E1000_CTRL_ILOS);
1872
1873 /* Set up duplex in the Device Control and Transmit Control
1874 * registers depending on negotiated values.
1875 */
1876 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
1877 if (ret_val)
1878 return ret_val;
1879
1880 if (phy_data & M88E1000_PSSR_DPLX)
1881 ctrl |= E1000_CTRL_FD;
1882 else
1883 ctrl &= ~E1000_CTRL_FD;
1884
1885 e1000_config_collision_dist(hw);
1886
1887 /* Set up speed in the Device Control register depending on
1888 * negotiated values.
1889 */
1890 if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS)
1891 ctrl |= E1000_CTRL_SPD_1000;
1892 else if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_100MBS)
1893 ctrl |= E1000_CTRL_SPD_100;
1894
1895 /* Write the configured values back to the Device Control Reg. */
1896 ew32(CTRL, ctrl);
1897 return E1000_SUCCESS;
1898 }
1899
1900 /**
1901 * e1000_force_mac_fc - force flow control settings
1902 * @hw: Struct containing variables accessed by shared code
1903 *
1904 * Forces the MAC's flow control settings.
1905 * Sets the TFCE and RFCE bits in the device control register to reflect
1906 * the adapter settings. TFCE and RFCE need to be explicitly set by
1907 * software when a Copper PHY is used because autonegotiation is managed
1908 * by the PHY rather than the MAC. Software must also configure these
1909 * bits when link is forced on a fiber connection.
1910 */
1911 s32 e1000_force_mac_fc(struct e1000_hw *hw)
1912 {
1913 u32 ctrl;
1914
1915 e_dbg("e1000_force_mac_fc");
1916
1917 /* Get the current configuration of the Device Control Register */
1918 ctrl = er32(CTRL);
1919
1920 /* Because we didn't get link via the internal auto-negotiation
1921 * mechanism (we either forced link or we got link via PHY
1922 * auto-neg), we have to manually enable/disable transmit an
1923 * receive flow control.
1924 *
1925 * The "Case" statement below enables/disable flow control
1926 * according to the "hw->fc" parameter.
1927 *
1928 * The possible values of the "fc" parameter are:
1929 * 0: Flow control is completely disabled
1930 * 1: Rx flow control is enabled (we can receive pause
1931 * frames but not send pause frames).
1932 * 2: Tx flow control is enabled (we can send pause frames
1933 * frames but we do not receive pause frames).
1934 * 3: Both Rx and TX flow control (symmetric) is enabled.
1935 * other: No other values should be possible at this point.
1936 */
1937
1938 switch (hw->fc) {
1939 case E1000_FC_NONE:
1940 ctrl &= (~(E1000_CTRL_TFCE | E1000_CTRL_RFCE));
1941 break;
1942 case E1000_FC_RX_PAUSE:
1943 ctrl &= (~E1000_CTRL_TFCE);
1944 ctrl |= E1000_CTRL_RFCE;
1945 break;
1946 case E1000_FC_TX_PAUSE:
1947 ctrl &= (~E1000_CTRL_RFCE);
1948 ctrl |= E1000_CTRL_TFCE;
1949 break;
1950 case E1000_FC_FULL:
1951 ctrl |= (E1000_CTRL_TFCE | E1000_CTRL_RFCE);
1952 break;
1953 default:
1954 e_dbg("Flow control param set incorrectly\n");
1955 return -E1000_ERR_CONFIG;
1956 }
1957
1958 /* Disable TX Flow Control for 82542 (rev 2.0) */
1959 if (hw->mac_type == e1000_82542_rev2_0)
1960 ctrl &= (~E1000_CTRL_TFCE);
1961
1962 ew32(CTRL, ctrl);
1963 return E1000_SUCCESS;
1964 }
1965
1966 /**
1967 * e1000_config_fc_after_link_up - configure flow control after autoneg
1968 * @hw: Struct containing variables accessed by shared code
1969 *
1970 * Configures flow control settings after link is established
1971 * Should be called immediately after a valid link has been established.
1972 * Forces MAC flow control settings if link was forced. When in MII/GMII mode
1973 * and autonegotiation is enabled, the MAC flow control settings will be set
1974 * based on the flow control negotiated by the PHY. In TBI mode, the TFCE
1975 * and RFCE bits will be automatically set to the negotiated flow control mode.
1976 */
1977 static s32 e1000_config_fc_after_link_up(struct e1000_hw *hw)
1978 {
1979 s32 ret_val;
1980 u16 mii_status_reg;
1981 u16 mii_nway_adv_reg;
1982 u16 mii_nway_lp_ability_reg;
1983 u16 speed;
1984 u16 duplex;
1985
1986 e_dbg("e1000_config_fc_after_link_up");
1987
1988 /* Check for the case where we have fiber media and auto-neg failed
1989 * so we had to force link. In this case, we need to force the
1990 * configuration of the MAC to match the "fc" parameter.
1991 */
1992 if (((hw->media_type == e1000_media_type_fiber) && (hw->autoneg_failed))
1993 || ((hw->media_type == e1000_media_type_internal_serdes)
1994 && (hw->autoneg_failed))
1995 || ((hw->media_type == e1000_media_type_copper)
1996 && (!hw->autoneg))) {
1997 ret_val = e1000_force_mac_fc(hw);
1998 if (ret_val) {
1999 e_dbg("Error forcing flow control settings\n");
2000 return ret_val;
2001 }
2002 }
2003
2004 /* Check for the case where we have copper media and auto-neg is
2005 * enabled. In this case, we need to check and see if Auto-Neg
2006 * has completed, and if so, how the PHY and link partner has
2007 * flow control configured.
2008 */
2009 if ((hw->media_type == e1000_media_type_copper) && hw->autoneg) {
2010 /* Read the MII Status Register and check to see if AutoNeg
2011 * has completed. We read this twice because this reg has
2012 * some "sticky" (latched) bits.
2013 */
2014 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
2015 if (ret_val)
2016 return ret_val;
2017 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
2018 if (ret_val)
2019 return ret_val;
2020
2021 if (mii_status_reg & MII_SR_AUTONEG_COMPLETE) {
2022 /* The AutoNeg process has completed, so we now need to
2023 * read both the Auto Negotiation Advertisement Register
2024 * (Address 4) and the Auto_Negotiation Base Page Ability
2025 * Register (Address 5) to determine how flow control was
2026 * negotiated.
2027 */
2028 ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_ADV,
2029 &mii_nway_adv_reg);
2030 if (ret_val)
2031 return ret_val;
2032 ret_val = e1000_read_phy_reg(hw, PHY_LP_ABILITY,
2033 &mii_nway_lp_ability_reg);
2034 if (ret_val)
2035 return ret_val;
2036
2037 /* Two bits in the Auto Negotiation Advertisement Register
2038 * (Address 4) and two bits in the Auto Negotiation Base
2039 * Page Ability Register (Address 5) determine flow control
2040 * for both the PHY and the link partner. The following
2041 * table, taken out of the IEEE 802.3ab/D6.0 dated March 25,
2042 * 1999, describes these PAUSE resolution bits and how flow
2043 * control is determined based upon these settings.
2044 * NOTE: DC = Don't Care
2045 *
2046 * LOCAL DEVICE | LINK PARTNER
2047 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | NIC Resolution
2048 *-------|---------|-------|---------|--------------------
2049 * 0 | 0 | DC | DC | E1000_FC_NONE
2050 * 0 | 1 | 0 | DC | E1000_FC_NONE
2051 * 0 | 1 | 1 | 0 | E1000_FC_NONE
2052 * 0 | 1 | 1 | 1 | E1000_FC_TX_PAUSE
2053 * 1 | 0 | 0 | DC | E1000_FC_NONE
2054 * 1 | DC | 1 | DC | E1000_FC_FULL
2055 * 1 | 1 | 0 | 0 | E1000_FC_NONE
2056 * 1 | 1 | 0 | 1 | E1000_FC_RX_PAUSE
2057 *
2058 */
2059 /* Are both PAUSE bits set to 1? If so, this implies
2060 * Symmetric Flow Control is enabled at both ends. The
2061 * ASM_DIR bits are irrelevant per the spec.
2062 *
2063 * For Symmetric Flow Control:
2064 *
2065 * LOCAL DEVICE | LINK PARTNER
2066 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
2067 *-------|---------|-------|---------|--------------------
2068 * 1 | DC | 1 | DC | E1000_FC_FULL
2069 *
2070 */
2071 if ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
2072 (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE)) {
2073 /* Now we need to check if the user selected RX ONLY
2074 * of pause frames. In this case, we had to advertise
2075 * FULL flow control because we could not advertise RX
2076 * ONLY. Hence, we must now check to see if we need to
2077 * turn OFF the TRANSMISSION of PAUSE frames.
2078 */
2079 if (hw->original_fc == E1000_FC_FULL) {
2080 hw->fc = E1000_FC_FULL;
2081 e_dbg("Flow Control = FULL.\n");
2082 } else {
2083 hw->fc = E1000_FC_RX_PAUSE;
2084 e_dbg
2085 ("Flow Control = RX PAUSE frames only.\n");
2086 }
2087 }
2088 /* For receiving PAUSE frames ONLY.
2089 *
2090 * LOCAL DEVICE | LINK PARTNER
2091 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
2092 *-------|---------|-------|---------|--------------------
2093 * 0 | 1 | 1 | 1 | E1000_FC_TX_PAUSE
2094 *
2095 */
2096 else if (!(mii_nway_adv_reg & NWAY_AR_PAUSE) &&
2097 (mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
2098 (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
2099 (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR))
2100 {
2101 hw->fc = E1000_FC_TX_PAUSE;
2102 e_dbg
2103 ("Flow Control = TX PAUSE frames only.\n");
2104 }
2105 /* For transmitting PAUSE frames ONLY.
2106 *
2107 * LOCAL DEVICE | LINK PARTNER
2108 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
2109 *-------|---------|-------|---------|--------------------
2110 * 1 | 1 | 0 | 1 | E1000_FC_RX_PAUSE
2111 *
2112 */
2113 else if ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
2114 (mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
2115 !(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
2116 (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR))
2117 {
2118 hw->fc = E1000_FC_RX_PAUSE;
2119 e_dbg
2120 ("Flow Control = RX PAUSE frames only.\n");
2121 }
2122 /* Per the IEEE spec, at this point flow control should be
2123 * disabled. However, we want to consider that we could
2124 * be connected to a legacy switch that doesn't advertise
2125 * desired flow control, but can be forced on the link
2126 * partner. So if we advertised no flow control, that is
2127 * what we will resolve to. If we advertised some kind of
2128 * receive capability (Rx Pause Only or Full Flow Control)
2129 * and the link partner advertised none, we will configure
2130 * ourselves to enable Rx Flow Control only. We can do
2131 * this safely for two reasons: If the link partner really
2132 * didn't want flow control enabled, and we enable Rx, no
2133 * harm done since we won't be receiving any PAUSE frames
2134 * anyway. If the intent on the link partner was to have
2135 * flow control enabled, then by us enabling RX only, we
2136 * can at least receive pause frames and process them.
2137 * This is a good idea because in most cases, since we are
2138 * predominantly a server NIC, more times than not we will
2139 * be asked to delay transmission of packets than asking
2140 * our link partner to pause transmission of frames.
2141 */
2142 else if ((hw->original_fc == E1000_FC_NONE ||
2143 hw->original_fc == E1000_FC_TX_PAUSE) ||
2144 hw->fc_strict_ieee) {
2145 hw->fc = E1000_FC_NONE;
2146 e_dbg("Flow Control = NONE.\n");
2147 } else {
2148 hw->fc = E1000_FC_RX_PAUSE;
2149 e_dbg
2150 ("Flow Control = RX PAUSE frames only.\n");
2151 }
2152
2153 /* Now we need to do one last check... If we auto-
2154 * negotiated to HALF DUPLEX, flow control should not be
2155 * enabled per IEEE 802.3 spec.
2156 */
2157 ret_val =
2158 e1000_get_speed_and_duplex(hw, &speed, &duplex);
2159 if (ret_val) {
2160 e_dbg
2161 ("Error getting link speed and duplex\n");
2162 return ret_val;
2163 }
2164
2165 if (duplex == HALF_DUPLEX)
2166 hw->fc = E1000_FC_NONE;
2167
2168 /* Now we call a subroutine to actually force the MAC
2169 * controller to use the correct flow control settings.
2170 */
2171 ret_val = e1000_force_mac_fc(hw);
2172 if (ret_val) {
2173 e_dbg
2174 ("Error forcing flow control settings\n");
2175 return ret_val;
2176 }
2177 } else {
2178 e_dbg
2179 ("Copper PHY and Auto Neg has not completed.\n");
2180 }
2181 }
2182 return E1000_SUCCESS;
2183 }
2184
2185 /**
2186 * e1000_check_for_serdes_link_generic - Check for link (Serdes)
2187 * @hw: pointer to the HW structure
2188 *
2189 * Checks for link up on the hardware. If link is not up and we have
2190 * a signal, then we need to force link up.
2191 */
2192 static s32 e1000_check_for_serdes_link_generic(struct e1000_hw *hw)
2193 {
2194 u32 rxcw;
2195 u32 ctrl;
2196 u32 status;
2197 s32 ret_val = E1000_SUCCESS;
2198
2199 e_dbg("e1000_check_for_serdes_link_generic");
2200
2201 ctrl = er32(CTRL);
2202 status = er32(STATUS);
2203 rxcw = er32(RXCW);
2204
2205 /*
2206 * If we don't have link (auto-negotiation failed or link partner
2207 * cannot auto-negotiate), and our link partner is not trying to
2208 * auto-negotiate with us (we are receiving idles or data),
2209 * we need to force link up. We also need to give auto-negotiation
2210 * time to complete.
2211 */
2212 /* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */
2213 if ((!(status & E1000_STATUS_LU)) && (!(rxcw & E1000_RXCW_C))) {
2214 if (hw->autoneg_failed == 0) {
2215 hw->autoneg_failed = 1;
2216 goto out;
2217 }
2218 e_dbg("NOT RXing /C/, disable AutoNeg and force link.\n");
2219
2220 /* Disable auto-negotiation in the TXCW register */
2221 ew32(TXCW, (hw->txcw & ~E1000_TXCW_ANE));
2222
2223 /* Force link-up and also force full-duplex. */
2224 ctrl = er32(CTRL);
2225 ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FD);
2226 ew32(CTRL, ctrl);
2227
2228 /* Configure Flow Control after forcing link up. */
2229 ret_val = e1000_config_fc_after_link_up(hw);
2230 if (ret_val) {
2231 e_dbg("Error configuring flow control\n");
2232 goto out;
2233 }
2234 } else if ((ctrl & E1000_CTRL_SLU) && (rxcw & E1000_RXCW_C)) {
2235 /*
2236 * If we are forcing link and we are receiving /C/ ordered
2237 * sets, re-enable auto-negotiation in the TXCW register
2238 * and disable forced link in the Device Control register
2239 * in an attempt to auto-negotiate with our link partner.
2240 */
2241 e_dbg("RXing /C/, enable AutoNeg and stop forcing link.\n");
2242 ew32(TXCW, hw->txcw);
2243 ew32(CTRL, (ctrl & ~E1000_CTRL_SLU));
2244
2245 hw->serdes_has_link = true;
2246 } else if (!(E1000_TXCW_ANE & er32(TXCW))) {
2247 /*
2248 * If we force link for non-auto-negotiation switch, check
2249 * link status based on MAC synchronization for internal
2250 * serdes media type.
2251 */
2252 /* SYNCH bit and IV bit are sticky. */
2253 udelay(10);
2254 rxcw = er32(RXCW);
2255 if (rxcw & E1000_RXCW_SYNCH) {
2256 if (!(rxcw & E1000_RXCW_IV)) {
2257 hw->serdes_has_link = true;
2258 e_dbg("SERDES: Link up - forced.\n");
2259 }
2260 } else {
2261 hw->serdes_has_link = false;
2262 e_dbg("SERDES: Link down - force failed.\n");
2263 }
2264 }
2265
2266 if (E1000_TXCW_ANE & er32(TXCW)) {
2267 status = er32(STATUS);
2268 if (status & E1000_STATUS_LU) {
2269 /* SYNCH bit and IV bit are sticky, so reread rxcw. */
2270 udelay(10);
2271 rxcw = er32(RXCW);
2272 if (rxcw & E1000_RXCW_SYNCH) {
2273 if (!(rxcw & E1000_RXCW_IV)) {
2274 hw->serdes_has_link = true;
2275 e_dbg("SERDES: Link up - autoneg "
2276 "completed successfully.\n");
2277 } else {
2278 hw->serdes_has_link = false;
2279 e_dbg("SERDES: Link down - invalid"
2280 "codewords detected in autoneg.\n");
2281 }
2282 } else {
2283 hw->serdes_has_link = false;
2284 e_dbg("SERDES: Link down - no sync.\n");
2285 }
2286 } else {
2287 hw->serdes_has_link = false;
2288 e_dbg("SERDES: Link down - autoneg failed\n");
2289 }
2290 }
2291
2292 out:
2293 return ret_val;
2294 }
2295
2296 /**
2297 * e1000_check_for_link
2298 * @hw: Struct containing variables accessed by shared code
2299 *
2300 * Checks to see if the link status of the hardware has changed.
2301 * Called by any function that needs to check the link status of the adapter.
2302 */
2303 s32 e1000_check_for_link(struct e1000_hw *hw)
2304 {
2305 u32 rxcw = 0;
2306 u32 ctrl;
2307 u32 status;
2308 u32 rctl;
2309 u32 icr;
2310 u32 signal = 0;
2311 s32 ret_val;
2312 u16 phy_data;
2313
2314 e_dbg("e1000_check_for_link");
2315
2316 ctrl = er32(CTRL);
2317 status = er32(STATUS);
2318
2319 /* On adapters with a MAC newer than 82544, SW Definable pin 1 will be
2320 * set when the optics detect a signal. On older adapters, it will be
2321 * cleared when there is a signal. This applies to fiber media only.
2322 */
2323 if ((hw->media_type == e1000_media_type_fiber) ||
2324 (hw->media_type == e1000_media_type_internal_serdes)) {
2325 rxcw = er32(RXCW);
2326
2327 if (hw->media_type == e1000_media_type_fiber) {
2328 signal =
2329 (hw->mac_type >
2330 e1000_82544) ? E1000_CTRL_SWDPIN1 : 0;
2331 if (status & E1000_STATUS_LU)
2332 hw->get_link_status = false;
2333 }
2334 }
2335
2336 /* If we have a copper PHY then we only want to go out to the PHY
2337 * registers to see if Auto-Neg has completed and/or if our link
2338 * status has changed. The get_link_status flag will be set if we
2339 * receive a Link Status Change interrupt or we have Rx Sequence
2340 * Errors.
2341 */
2342 if ((hw->media_type == e1000_media_type_copper) && hw->get_link_status) {
2343 /* First we want to see if the MII Status Register reports
2344 * link. If so, then we want to get the current speed/duplex
2345 * of the PHY.
2346 * Read the register twice since the link bit is sticky.
2347 */
2348 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
2349 if (ret_val)
2350 return ret_val;
2351 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
2352 if (ret_val)
2353 return ret_val;
2354
2355 if (phy_data & MII_SR_LINK_STATUS) {
2356 hw->get_link_status = false;
2357 /* Check if there was DownShift, must be checked immediately after
2358 * link-up */
2359 e1000_check_downshift(hw);
2360
2361 /* If we are on 82544 or 82543 silicon and speed/duplex
2362 * are forced to 10H or 10F, then we will implement the polarity
2363 * reversal workaround. We disable interrupts first, and upon
2364 * returning, place the devices interrupt state to its previous
2365 * value except for the link status change interrupt which will
2366 * happen due to the execution of this workaround.
2367 */
2368
2369 if ((hw->mac_type == e1000_82544
2370 || hw->mac_type == e1000_82543) && (!hw->autoneg)
2371 && (hw->forced_speed_duplex == e1000_10_full
2372 || hw->forced_speed_duplex == e1000_10_half)) {
2373 ew32(IMC, 0xffffffff);
2374 ret_val =
2375 e1000_polarity_reversal_workaround(hw);
2376 icr = er32(ICR);
2377 ew32(ICS, (icr & ~E1000_ICS_LSC));
2378 ew32(IMS, IMS_ENABLE_MASK);
2379 }
2380
2381 } else {
2382 /* No link detected */
2383 e1000_config_dsp_after_link_change(hw, false);
2384 return 0;
2385 }
2386
2387 /* If we are forcing speed/duplex, then we simply return since
2388 * we have already determined whether we have link or not.
2389 */
2390 if (!hw->autoneg)
2391 return -E1000_ERR_CONFIG;
2392
2393 /* optimize the dsp settings for the igp phy */
2394 e1000_config_dsp_after_link_change(hw, true);
2395
2396 /* We have a M88E1000 PHY and Auto-Neg is enabled. If we
2397 * have Si on board that is 82544 or newer, Auto
2398 * Speed Detection takes care of MAC speed/duplex
2399 * configuration. So we only need to configure Collision
2400 * Distance in the MAC. Otherwise, we need to force
2401 * speed/duplex on the MAC to the current PHY speed/duplex
2402 * settings.
2403 */
2404 if (hw->mac_type >= e1000_82544)
2405 e1000_config_collision_dist(hw);
2406 else {
2407 ret_val = e1000_config_mac_to_phy(hw);
2408 if (ret_val) {
2409 e_dbg
2410 ("Error configuring MAC to PHY settings\n");
2411 return ret_val;
2412 }
2413 }
2414
2415 /* Configure Flow Control now that Auto-Neg has completed. First, we
2416 * need to restore the desired flow control settings because we may
2417 * have had to re-autoneg with a different link partner.
2418 */
2419 ret_val = e1000_config_fc_after_link_up(hw);
2420 if (ret_val) {
2421 e_dbg("Error configuring flow control\n");
2422 return ret_val;
2423 }
2424
2425 /* At this point we know that we are on copper and we have
2426 * auto-negotiated link. These are conditions for checking the link
2427 * partner capability register. We use the link speed to determine if
2428 * TBI compatibility needs to be turned on or off. If the link is not
2429 * at gigabit speed, then TBI compatibility is not needed. If we are
2430 * at gigabit speed, we turn on TBI compatibility.
2431 */
2432 if (hw->tbi_compatibility_en) {
2433 u16 speed, duplex;
2434 ret_val =
2435 e1000_get_speed_and_duplex(hw, &speed, &duplex);
2436 if (ret_val) {
2437 e_dbg
2438 ("Error getting link speed and duplex\n");
2439 return ret_val;
2440 }
2441 if (speed != SPEED_1000) {
2442 /* If link speed is not set to gigabit speed, we do not need
2443 * to enable TBI compatibility.
2444 */
2445 if (hw->tbi_compatibility_on) {
2446 /* If we previously were in the mode, turn it off. */
2447 rctl = er32(RCTL);
2448 rctl &= ~E1000_RCTL_SBP;
2449 ew32(RCTL, rctl);
2450 hw->tbi_compatibility_on = false;
2451 }
2452 } else {
2453 /* If TBI compatibility is was previously off, turn it on. For
2454 * compatibility with a TBI link partner, we will store bad
2455 * packets. Some frames have an additional byte on the end and
2456 * will look like CRC errors to to the hardware.
2457 */
2458 if (!hw->tbi_compatibility_on) {
2459 hw->tbi_compatibility_on = true;
2460 rctl = er32(RCTL);
2461 rctl |= E1000_RCTL_SBP;
2462 ew32(RCTL, rctl);
2463 }
2464 }
2465 }
2466 }
2467
2468 if ((hw->media_type == e1000_media_type_fiber) ||
2469 (hw->media_type == e1000_media_type_internal_serdes))
2470 e1000_check_for_serdes_link_generic(hw);
2471
2472 return E1000_SUCCESS;
2473 }
2474
2475 /**
2476 * e1000_get_speed_and_duplex
2477 * @hw: Struct containing variables accessed by shared code
2478 * @speed: Speed of the connection
2479 * @duplex: Duplex setting of the connection
2480
2481 * Detects the current speed and duplex settings of the hardware.
2482 */
2483 s32 e1000_get_speed_and_duplex(struct e1000_hw *hw, u16 *speed, u16 *duplex)
2484 {
2485 u32 status;
2486 s32 ret_val;
2487 u16 phy_data;
2488
2489 e_dbg("e1000_get_speed_and_duplex");
2490
2491 if (hw->mac_type >= e1000_82543) {
2492 status = er32(STATUS);
2493 if (status & E1000_STATUS_SPEED_1000) {
2494 *speed = SPEED_1000;
2495 e_dbg("1000 Mbs, ");
2496 } else if (status & E1000_STATUS_SPEED_100) {
2497 *speed = SPEED_100;
2498 e_dbg("100 Mbs, ");
2499 } else {
2500 *speed = SPEED_10;
2501 e_dbg("10 Mbs, ");
2502 }
2503
2504 if (status & E1000_STATUS_FD) {
2505 *duplex = FULL_DUPLEX;
2506 e_dbg("Full Duplex\n");
2507 } else {
2508 *duplex = HALF_DUPLEX;
2509 e_dbg(" Half Duplex\n");
2510 }
2511 } else {
2512 e_dbg("1000 Mbs, Full Duplex\n");
2513 *speed = SPEED_1000;
2514 *duplex = FULL_DUPLEX;
2515 }
2516
2517 /* IGP01 PHY may advertise full duplex operation after speed downgrade even
2518 * if it is operating at half duplex. Here we set the duplex settings to
2519 * match the duplex in the link partner's capabilities.
2520 */
2521 if (hw->phy_type == e1000_phy_igp && hw->speed_downgraded) {
2522 ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_EXP, &phy_data);
2523 if (ret_val)
2524 return ret_val;
2525
2526 if (!(phy_data & NWAY_ER_LP_NWAY_CAPS))
2527 *duplex = HALF_DUPLEX;
2528 else {
2529 ret_val =
2530 e1000_read_phy_reg(hw, PHY_LP_ABILITY, &phy_data);
2531 if (ret_val)
2532 return ret_val;
2533 if ((*speed == SPEED_100
2534 && !(phy_data & NWAY_LPAR_100TX_FD_CAPS))
2535 || (*speed == SPEED_10
2536 && !(phy_data & NWAY_LPAR_10T_FD_CAPS)))
2537 *duplex = HALF_DUPLEX;
2538 }
2539 }
2540
2541 return E1000_SUCCESS;
2542 }
2543
2544 /**
2545 * e1000_wait_autoneg
2546 * @hw: Struct containing variables accessed by shared code
2547 *
2548 * Blocks until autoneg completes or times out (~4.5 seconds)
2549 */
2550 static s32 e1000_wait_autoneg(struct e1000_hw *hw)
2551 {
2552 s32 ret_val;
2553 u16 i;
2554 u16 phy_data;
2555
2556 e_dbg("e1000_wait_autoneg");
2557 e_dbg("Waiting for Auto-Neg to complete.\n");
2558
2559 /* We will wait for autoneg to complete or 4.5 seconds to expire. */
2560 for (i = PHY_AUTO_NEG_TIME; i > 0; i--) {
2561 /* Read the MII Status Register and wait for Auto-Neg
2562 * Complete bit to be set.
2563 */
2564 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
2565 if (ret_val)
2566 return ret_val;
2567 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
2568 if (ret_val)
2569 return ret_val;
2570 if (phy_data & MII_SR_AUTONEG_COMPLETE) {
2571 return E1000_SUCCESS;
2572 }
2573 msleep(100);
2574 }
2575 return E1000_SUCCESS;
2576 }
2577
2578 /**
2579 * e1000_raise_mdi_clk - Raises the Management Data Clock
2580 * @hw: Struct containing variables accessed by shared code
2581 * @ctrl: Device control register's current value
2582 */
2583 static void e1000_raise_mdi_clk(struct e1000_hw *hw, u32 *ctrl)
2584 {
2585 /* Raise the clock input to the Management Data Clock (by setting the MDC
2586 * bit), and then delay 10 microseconds.
2587 */
2588 ew32(CTRL, (*ctrl | E1000_CTRL_MDC));
2589 E1000_WRITE_FLUSH();
2590 udelay(10);
2591 }
2592
2593 /**
2594 * e1000_lower_mdi_clk - Lowers the Management Data Clock
2595 * @hw: Struct containing variables accessed by shared code
2596 * @ctrl: Device control register's current value
2597 */
2598 static void e1000_lower_mdi_clk(struct e1000_hw *hw, u32 *ctrl)
2599 {
2600 /* Lower the clock input to the Management Data Clock (by clearing the MDC
2601 * bit), and then delay 10 microseconds.
2602 */
2603 ew32(CTRL, (*ctrl & ~E1000_CTRL_MDC));
2604 E1000_WRITE_FLUSH();
2605 udelay(10);
2606 }
2607
2608 /**
2609 * e1000_shift_out_mdi_bits - Shifts data bits out to the PHY
2610 * @hw: Struct containing variables accessed by shared code
2611 * @data: Data to send out to the PHY
2612 * @count: Number of bits to shift out
2613 *
2614 * Bits are shifted out in MSB to LSB order.
2615 */
2616 static void e1000_shift_out_mdi_bits(struct e1000_hw *hw, u32 data, u16 count)
2617 {
2618 u32 ctrl;
2619 u32 mask;
2620
2621 /* We need to shift "count" number of bits out to the PHY. So, the value
2622 * in the "data" parameter will be shifted out to the PHY one bit at a
2623 * time. In order to do this, "data" must be broken down into bits.
2624 */
2625 mask = 0x01;
2626 mask <<= (count - 1);
2627
2628 ctrl = er32(CTRL);
2629
2630 /* Set MDIO_DIR and MDC_DIR direction bits to be used as output pins. */
2631 ctrl |= (E1000_CTRL_MDIO_DIR | E1000_CTRL_MDC_DIR);
2632
2633 while (mask) {
2634 /* A "1" is shifted out to the PHY by setting the MDIO bit to "1" and
2635 * then raising and lowering the Management Data Clock. A "0" is
2636 * shifted out to the PHY by setting the MDIO bit to "0" and then
2637 * raising and lowering the clock.
2638 */
2639 if (data & mask)
2640 ctrl |= E1000_CTRL_MDIO;
2641 else
2642 ctrl &= ~E1000_CTRL_MDIO;
2643
2644 ew32(CTRL, ctrl);
2645 E1000_WRITE_FLUSH();
2646
2647 udelay(10);
2648
2649 e1000_raise_mdi_clk(hw, &ctrl);
2650 e1000_lower_mdi_clk(hw, &ctrl);
2651
2652 mask = mask >> 1;
2653 }
2654 }
2655
2656 /**
2657 * e1000_shift_in_mdi_bits - Shifts data bits in from the PHY
2658 * @hw: Struct containing variables accessed by shared code
2659 *
2660 * Bits are shifted in in MSB to LSB order.
2661 */
2662 static u16 e1000_shift_in_mdi_bits(struct e1000_hw *hw)
2663 {
2664 u32 ctrl;
2665 u16 data = 0;
2666 u8 i;
2667
2668 /* In order to read a register from the PHY, we need to shift in a total
2669 * of 18 bits from the PHY. The first two bit (turnaround) times are used
2670 * to avoid contention on the MDIO pin when a read operation is performed.
2671 * These two bits are ignored by us and thrown away. Bits are "shifted in"
2672 * by raising the input to the Management Data Clock (setting the MDC bit),
2673 * and then reading the value of the MDIO bit.
2674 */
2675 ctrl = er32(CTRL);
2676
2677 /* Clear MDIO_DIR (SWDPIO1) to indicate this bit is to be used as input. */
2678 ctrl &= ~E1000_CTRL_MDIO_DIR;
2679 ctrl &= ~E1000_CTRL_MDIO;
2680
2681 ew32(CTRL, ctrl);
2682 E1000_WRITE_FLUSH();
2683
2684 /* Raise and Lower the clock before reading in the data. This accounts for
2685 * the turnaround bits. The first clock occurred when we clocked out the
2686 * last bit of the Register Address.
2687 */
2688 e1000_raise_mdi_clk(hw, &ctrl);
2689 e1000_lower_mdi_clk(hw, &ctrl);
2690
2691 for (data = 0, i = 0; i < 16; i++) {
2692 data = data << 1;
2693 e1000_raise_mdi_clk(hw, &ctrl);
2694 ctrl = er32(CTRL);
2695 /* Check to see if we shifted in a "1". */
2696 if (ctrl & E1000_CTRL_MDIO)
2697 data |= 1;
2698 e1000_lower_mdi_clk(hw, &ctrl);
2699 }
2700
2701 e1000_raise_mdi_clk(hw, &ctrl);
2702 e1000_lower_mdi_clk(hw, &ctrl);
2703
2704 return data;
2705 }
2706
2707
2708 /**
2709 * e1000_read_phy_reg - read a phy register
2710 * @hw: Struct containing variables accessed by shared code
2711 * @reg_addr: address of the PHY register to read
2712 *
2713 * Reads the value from a PHY register, if the value is on a specific non zero
2714 * page, sets the page first.
2715 */
2716 s32 e1000_read_phy_reg(struct e1000_hw *hw, u32 reg_addr, u16 *phy_data)
2717 {
2718 u32 ret_val;
2719
2720 e_dbg("e1000_read_phy_reg");
2721
2722 if ((hw->phy_type == e1000_phy_igp) &&
2723 (reg_addr > MAX_PHY_MULTI_PAGE_REG)) {
2724 ret_val = e1000_write_phy_reg_ex(hw, IGP01E1000_PHY_PAGE_SELECT,
2725 (u16) reg_addr);
2726 if (ret_val)
2727 return ret_val;
2728 }
2729
2730 ret_val = e1000_read_phy_reg_ex(hw, MAX_PHY_REG_ADDRESS & reg_addr,
2731 phy_data);
2732
2733 return ret_val;
2734 }
2735
2736 static s32 e1000_read_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr,
2737 u16 *phy_data)
2738 {
2739 u32 i;
2740 u32 mdic = 0;
2741 const u32 phy_addr = 1;
2742
2743 e_dbg("e1000_read_phy_reg_ex");
2744
2745 if (reg_addr > MAX_PHY_REG_ADDRESS) {
2746 e_dbg("PHY Address %d is out of range\n", reg_addr);
2747 return -E1000_ERR_PARAM;
2748 }
2749
2750 if (hw->mac_type > e1000_82543) {
2751 /* Set up Op-code, Phy Address, and register address in the MDI
2752 * Control register. The MAC will take care of interfacing with the
2753 * PHY to retrieve the desired data.
2754 */
2755 mdic = ((reg_addr << E1000_MDIC_REG_SHIFT) |
2756 (phy_addr << E1000_MDIC_PHY_SHIFT) |
2757 (E1000_MDIC_OP_READ));
2758
2759 ew32(MDIC, mdic);
2760
2761 /* Poll the ready bit to see if the MDI read completed */
2762 for (i = 0; i < 64; i++) {
2763 udelay(50);
2764 mdic = er32(MDIC);
2765 if (mdic & E1000_MDIC_READY)
2766 break;
2767 }
2768 if (!(mdic & E1000_MDIC_READY)) {
2769 e_dbg("MDI Read did not complete\n");
2770 return -E1000_ERR_PHY;
2771 }
2772 if (mdic & E1000_MDIC_ERROR) {
2773 e_dbg("MDI Error\n");
2774 return -E1000_ERR_PHY;
2775 }
2776 *phy_data = (u16) mdic;
2777 } else {
2778 /* We must first send a preamble through the MDIO pin to signal the
2779 * beginning of an MII instruction. This is done by sending 32
2780 * consecutive "1" bits.
2781 */
2782 e1000_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE);
2783
2784 /* Now combine the next few fields that are required for a read
2785 * operation. We use this method instead of calling the
2786 * e1000_shift_out_mdi_bits routine five different times. The format of
2787 * a MII read instruction consists of a shift out of 14 bits and is
2788 * defined as follows:
2789 * <Preamble><SOF><Op Code><Phy Addr><Reg Addr>
2790 * followed by a shift in of 18 bits. This first two bits shifted in
2791 * are TurnAround bits used to avoid contention on the MDIO pin when a
2792 * READ operation is performed. These two bits are thrown away
2793 * followed by a shift in of 16 bits which contains the desired data.
2794 */
2795 mdic = ((reg_addr) | (phy_addr << 5) |
2796 (PHY_OP_READ << 10) | (PHY_SOF << 12));
2797
2798 e1000_shift_out_mdi_bits(hw, mdic, 14);
2799
2800 /* Now that we've shifted out the read command to the MII, we need to
2801 * "shift in" the 16-bit value (18 total bits) of the requested PHY
2802 * register address.
2803 */
2804 *phy_data = e1000_shift_in_mdi_bits(hw);
2805 }
2806 return E1000_SUCCESS;
2807 }
2808
2809 /**
2810 * e1000_write_phy_reg - write a phy register
2811 *
2812 * @hw: Struct containing variables accessed by shared code
2813 * @reg_addr: address of the PHY register to write
2814 * @data: data to write to the PHY
2815
2816 * Writes a value to a PHY register
2817 */
2818 s32 e1000_write_phy_reg(struct e1000_hw *hw, u32 reg_addr, u16 phy_data)
2819 {
2820 u32 ret_val;
2821
2822 e_dbg("e1000_write_phy_reg");
2823
2824 if ((hw->phy_type == e1000_phy_igp) &&
2825 (reg_addr > MAX_PHY_MULTI_PAGE_REG)) {
2826 ret_val = e1000_write_phy_reg_ex(hw, IGP01E1000_PHY_PAGE_SELECT,
2827 (u16) reg_addr);
2828 if (ret_val)
2829 return ret_val;
2830 }
2831
2832 ret_val = e1000_write_phy_reg_ex(hw, MAX_PHY_REG_ADDRESS & reg_addr,
2833 phy_data);
2834
2835 return ret_val;
2836 }
2837
2838 static s32 e1000_write_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr,
2839 u16 phy_data)
2840 {
2841 u32 i;
2842 u32 mdic = 0;
2843 const u32 phy_addr = 1;
2844
2845 e_dbg("e1000_write_phy_reg_ex");
2846
2847 if (reg_addr > MAX_PHY_REG_ADDRESS) {
2848 e_dbg("PHY Address %d is out of range\n", reg_addr);
2849 return -E1000_ERR_PARAM;
2850 }
2851
2852 if (hw->mac_type > e1000_82543) {
2853 /* Set up Op-code, Phy Address, register address, and data intended
2854 * for the PHY register in the MDI Control register. The MAC will take
2855 * care of interfacing with the PHY to send the desired data.
2856 */
2857 mdic = (((u32) phy_data) |
2858 (reg_addr << E1000_MDIC_REG_SHIFT) |
2859 (phy_addr << E1000_MDIC_PHY_SHIFT) |
2860 (E1000_MDIC_OP_WRITE));
2861
2862 ew32(MDIC, mdic);
2863
2864 /* Poll the ready bit to see if the MDI read completed */
2865 for (i = 0; i < 641; i++) {
2866 udelay(5);
2867 mdic = er32(MDIC);
2868 if (mdic & E1000_MDIC_READY)
2869 break;
2870 }
2871 if (!(mdic & E1000_MDIC_READY)) {
2872 e_dbg("MDI Write did not complete\n");
2873 return -E1000_ERR_PHY;
2874 }
2875 } else {
2876 /* We'll need to use the SW defined pins to shift the write command
2877 * out to the PHY. We first send a preamble to the PHY to signal the
2878 * beginning of the MII instruction. This is done by sending 32
2879 * consecutive "1" bits.
2880 */
2881 e1000_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE);
2882
2883 /* Now combine the remaining required fields that will indicate a
2884 * write operation. We use this method instead of calling the
2885 * e1000_shift_out_mdi_bits routine for each field in the command. The
2886 * format of a MII write instruction is as follows:
2887 * <Preamble><SOF><Op Code><Phy Addr><Reg Addr><Turnaround><Data>.
2888 */
2889 mdic = ((PHY_TURNAROUND) | (reg_addr << 2) | (phy_addr << 7) |
2890 (PHY_OP_WRITE << 12) | (PHY_SOF << 14));
2891 mdic <<= 16;
2892 mdic |= (u32) phy_data;
2893
2894 e1000_shift_out_mdi_bits(hw, mdic, 32);
2895 }
2896
2897 return E1000_SUCCESS;
2898 }
2899
2900 /**
2901 * e1000_phy_hw_reset - reset the phy, hardware style
2902 * @hw: Struct containing variables accessed by shared code
2903 *
2904 * Returns the PHY to the power-on reset state
2905 */
2906 s32 e1000_phy_hw_reset(struct e1000_hw *hw)
2907 {
2908 u32 ctrl, ctrl_ext;
2909 u32 led_ctrl;
2910 s32 ret_val;
2911
2912 e_dbg("e1000_phy_hw_reset");
2913
2914 e_dbg("Resetting Phy...\n");
2915
2916 if (hw->mac_type > e1000_82543) {
2917 /* Read the device control register and assert the E1000_CTRL_PHY_RST
2918 * bit. Then, take it out of reset.
2919 * For e1000 hardware, we delay for 10ms between the assert
2920 * and deassert.
2921 */
2922 ctrl = er32(CTRL);
2923 ew32(CTRL, ctrl | E1000_CTRL_PHY_RST);
2924 E1000_WRITE_FLUSH();
2925
2926 msleep(10);
2927
2928 ew32(CTRL, ctrl);
2929 E1000_WRITE_FLUSH();
2930
2931 } else {
2932 /* Read the Extended Device Control Register, assert the PHY_RESET_DIR
2933 * bit to put the PHY into reset. Then, take it out of reset.
2934 */
2935 ctrl_ext = er32(CTRL_EXT);
2936 ctrl_ext |= E1000_CTRL_EXT_SDP4_DIR;
2937 ctrl_ext &= ~E1000_CTRL_EXT_SDP4_DATA;
2938 ew32(CTRL_EXT, ctrl_ext);
2939 E1000_WRITE_FLUSH();
2940 msleep(10);
2941 ctrl_ext |= E1000_CTRL_EXT_SDP4_DATA;
2942 ew32(CTRL_EXT, ctrl_ext);
2943 E1000_WRITE_FLUSH();
2944 }
2945 udelay(150);
2946
2947 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) {
2948 /* Configure activity LED after PHY reset */
2949 led_ctrl = er32(LEDCTL);
2950 led_ctrl &= IGP_ACTIVITY_LED_MASK;
2951 led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE);
2952 ew32(LEDCTL, led_ctrl);
2953 }
2954
2955 /* Wait for FW to finish PHY configuration. */
2956 ret_val = e1000_get_phy_cfg_done(hw);
2957 if (ret_val != E1000_SUCCESS)
2958 return ret_val;
2959
2960 return ret_val;
2961 }
2962
2963 /**
2964 * e1000_phy_reset - reset the phy to commit settings
2965 * @hw: Struct containing variables accessed by shared code
2966 *
2967 * Resets the PHY
2968 * Sets bit 15 of the MII Control register
2969 */
2970 s32 e1000_phy_reset(struct e1000_hw *hw)
2971 {
2972 s32 ret_val;
2973 u16 phy_data;
2974
2975 e_dbg("e1000_phy_reset");
2976
2977 switch (hw->phy_type) {
2978 case e1000_phy_igp:
2979 ret_val = e1000_phy_hw_reset(hw);
2980 if (ret_val)
2981 return ret_val;
2982 break;
2983 default:
2984 ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data);
2985 if (ret_val)
2986 return ret_val;
2987
2988 phy_data |= MII_CR_RESET;
2989 ret_val = e1000_write_phy_reg(hw, PHY_CTRL, phy_data);
2990 if (ret_val)
2991 return ret_val;
2992
2993 udelay(1);
2994 break;
2995 }
2996
2997 if (hw->phy_type == e1000_phy_igp)
2998 e1000_phy_init_script(hw);
2999
3000 return E1000_SUCCESS;
3001 }
3002
3003 /**
3004 * e1000_detect_gig_phy - check the phy type
3005 * @hw: Struct containing variables accessed by shared code
3006 *
3007 * Probes the expected PHY address for known PHY IDs
3008 */
3009 static s32 e1000_detect_gig_phy(struct e1000_hw *hw)
3010 {
3011 s32 phy_init_status, ret_val;
3012 u16 phy_id_high, phy_id_low;
3013 bool match = false;
3014
3015 e_dbg("e1000_detect_gig_phy");
3016
3017 if (hw->phy_id != 0)
3018 return E1000_SUCCESS;
3019
3020 /* Read the PHY ID Registers to identify which PHY is onboard. */
3021 ret_val = e1000_read_phy_reg(hw, PHY_ID1, &phy_id_high);
3022 if (ret_val)
3023 return ret_val;
3024
3025 hw->phy_id = (u32) (phy_id_high << 16);
3026 udelay(20);
3027 ret_val = e1000_read_phy_reg(hw, PHY_ID2, &phy_id_low);
3028 if (ret_val)
3029 return ret_val;
3030
3031 hw->phy_id |= (u32) (phy_id_low & PHY_REVISION_MASK);
3032 hw->phy_revision = (u32) phy_id_low & ~PHY_REVISION_MASK;
3033
3034 switch (hw->mac_type) {
3035 case e1000_82543:
3036 if (hw->phy_id == M88E1000_E_PHY_ID)
3037 match = true;
3038 break;
3039 case e1000_82544:
3040 if (hw->phy_id == M88E1000_I_PHY_ID)
3041 match = true;
3042 break;
3043 case e1000_82540:
3044 case e1000_82545:
3045 case e1000_82545_rev_3:
3046 case e1000_82546:
3047 case e1000_82546_rev_3:
3048 if (hw->phy_id == M88E1011_I_PHY_ID)
3049 match = true;
3050 break;
3051 case e1000_82541:
3052 case e1000_82541_rev_2:
3053 case e1000_82547:
3054 case e1000_82547_rev_2:
3055 if (hw->phy_id == IGP01E1000_I_PHY_ID)
3056 match = true;
3057 break;
3058 default:
3059 e_dbg("Invalid MAC type %d\n", hw->mac_type);
3060 return -E1000_ERR_CONFIG;
3061 }
3062 phy_init_status = e1000_set_phy_type(hw);
3063
3064 if ((match) && (phy_init_status == E1000_SUCCESS)) {
3065 e_dbg("PHY ID 0x%X detected\n", hw->phy_id);
3066 return E1000_SUCCESS;
3067 }
3068 e_dbg("Invalid PHY ID 0x%X\n", hw->phy_id);
3069 return -E1000_ERR_PHY;
3070 }
3071
3072 /**
3073 * e1000_phy_reset_dsp - reset DSP
3074 * @hw: Struct containing variables accessed by shared code
3075 *
3076 * Resets the PHY's DSP
3077 */
3078 static s32 e1000_phy_reset_dsp(struct e1000_hw *hw)
3079 {
3080 s32 ret_val;
3081 e_dbg("e1000_phy_reset_dsp");
3082
3083 do {
3084 ret_val = e1000_write_phy_reg(hw, 29, 0x001d);
3085 if (ret_val)
3086 break;
3087 ret_val = e1000_write_phy_reg(hw, 30, 0x00c1);
3088 if (ret_val)
3089 break;
3090 ret_val = e1000_write_phy_reg(hw, 30, 0x0000);
3091 if (ret_val)
3092 break;
3093 ret_val = E1000_SUCCESS;
3094 } while (0);
3095
3096 return ret_val;
3097 }
3098
3099 /**
3100 * e1000_phy_igp_get_info - get igp specific registers
3101 * @hw: Struct containing variables accessed by shared code
3102 * @phy_info: PHY information structure
3103 *
3104 * Get PHY information from various PHY registers for igp PHY only.
3105 */
3106 static s32 e1000_phy_igp_get_info(struct e1000_hw *hw,
3107 struct e1000_phy_info *phy_info)
3108 {
3109 s32 ret_val;
3110 u16 phy_data, min_length, max_length, average;
3111 e1000_rev_polarity polarity;
3112
3113 e_dbg("e1000_phy_igp_get_info");
3114
3115 /* The downshift status is checked only once, after link is established,
3116 * and it stored in the hw->speed_downgraded parameter. */
3117 phy_info->downshift = (e1000_downshift) hw->speed_downgraded;
3118
3119 /* IGP01E1000 does not need to support it. */
3120 phy_info->extended_10bt_distance = e1000_10bt_ext_dist_enable_normal;
3121
3122 /* IGP01E1000 always correct polarity reversal */
3123 phy_info->polarity_correction = e1000_polarity_reversal_enabled;
3124
3125 /* Check polarity status */
3126 ret_val = e1000_check_polarity(hw, &polarity);
3127 if (ret_val)
3128 return ret_val;
3129
3130 phy_info->cable_polarity = polarity;
3131
3132 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_STATUS, &phy_data);
3133 if (ret_val)
3134 return ret_val;
3135
3136 phy_info->mdix_mode =
3137 (e1000_auto_x_mode) ((phy_data & IGP01E1000_PSSR_MDIX) >>
3138 IGP01E1000_PSSR_MDIX_SHIFT);
3139
3140 if ((phy_data & IGP01E1000_PSSR_SPEED_MASK) ==
3141 IGP01E1000_PSSR_SPEED_1000MBPS) {
3142 /* Local/Remote Receiver Information are only valid at 1000 Mbps */
3143 ret_val = e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_data);
3144 if (ret_val)
3145 return ret_val;
3146
3147 phy_info->local_rx = ((phy_data & SR_1000T_LOCAL_RX_STATUS) >>
3148 SR_1000T_LOCAL_RX_STATUS_SHIFT) ?
3149 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3150 phy_info->remote_rx = ((phy_data & SR_1000T_REMOTE_RX_STATUS) >>
3151 SR_1000T_REMOTE_RX_STATUS_SHIFT) ?
3152 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3153
3154 /* Get cable length */
3155 ret_val = e1000_get_cable_length(hw, &min_length, &max_length);
3156 if (ret_val)
3157 return ret_val;
3158
3159 /* Translate to old method */
3160 average = (max_length + min_length) / 2;
3161
3162 if (average <= e1000_igp_cable_length_50)
3163 phy_info->cable_length = e1000_cable_length_50;
3164 else if (average <= e1000_igp_cable_length_80)
3165 phy_info->cable_length = e1000_cable_length_50_80;
3166 else if (average <= e1000_igp_cable_length_110)
3167 phy_info->cable_length = e1000_cable_length_80_110;
3168 else if (average <= e1000_igp_cable_length_140)
3169 phy_info->cable_length = e1000_cable_length_110_140;
3170 else
3171 phy_info->cable_length = e1000_cable_length_140;
3172 }
3173
3174 return E1000_SUCCESS;
3175 }
3176
3177 /**
3178 * e1000_phy_m88_get_info - get m88 specific registers
3179 * @hw: Struct containing variables accessed by shared code
3180 * @phy_info: PHY information structure
3181 *
3182 * Get PHY information from various PHY registers for m88 PHY only.
3183 */
3184 static s32 e1000_phy_m88_get_info(struct e1000_hw *hw,
3185 struct e1000_phy_info *phy_info)
3186 {
3187 s32 ret_val;
3188 u16 phy_data;
3189 e1000_rev_polarity polarity;
3190
3191 e_dbg("e1000_phy_m88_get_info");
3192
3193 /* The downshift status is checked only once, after link is established,
3194 * and it stored in the hw->speed_downgraded parameter. */
3195 phy_info->downshift = (e1000_downshift) hw->speed_downgraded;
3196
3197 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
3198 if (ret_val)
3199 return ret_val;
3200
3201 phy_info->extended_10bt_distance =
3202 ((phy_data & M88E1000_PSCR_10BT_EXT_DIST_ENABLE) >>
3203 M88E1000_PSCR_10BT_EXT_DIST_ENABLE_SHIFT) ?
3204 e1000_10bt_ext_dist_enable_lower :
3205 e1000_10bt_ext_dist_enable_normal;
3206
3207 phy_info->polarity_correction =
3208 ((phy_data & M88E1000_PSCR_POLARITY_REVERSAL) >>
3209 M88E1000_PSCR_POLARITY_REVERSAL_SHIFT) ?
3210 e1000_polarity_reversal_disabled : e1000_polarity_reversal_enabled;
3211
3212 /* Check polarity status */
3213 ret_val = e1000_check_polarity(hw, &polarity);
3214 if (ret_val)
3215 return ret_val;
3216 phy_info->cable_polarity = polarity;
3217
3218 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
3219 if (ret_val)
3220 return ret_val;
3221
3222 phy_info->mdix_mode =
3223 (e1000_auto_x_mode) ((phy_data & M88E1000_PSSR_MDIX) >>
3224 M88E1000_PSSR_MDIX_SHIFT);
3225
3226 if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) {
3227 /* Cable Length Estimation and Local/Remote Receiver Information
3228 * are only valid at 1000 Mbps.
3229 */
3230 phy_info->cable_length =
3231 (e1000_cable_length) ((phy_data &
3232 M88E1000_PSSR_CABLE_LENGTH) >>
3233 M88E1000_PSSR_CABLE_LENGTH_SHIFT);
3234
3235 ret_val = e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_data);
3236 if (ret_val)
3237 return ret_val;
3238
3239 phy_info->local_rx = ((phy_data & SR_1000T_LOCAL_RX_STATUS) >>
3240 SR_1000T_LOCAL_RX_STATUS_SHIFT) ?
3241 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3242 phy_info->remote_rx = ((phy_data & SR_1000T_REMOTE_RX_STATUS) >>
3243 SR_1000T_REMOTE_RX_STATUS_SHIFT) ?
3244 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3245
3246 }
3247
3248 return E1000_SUCCESS;
3249 }
3250
3251 /**
3252 * e1000_phy_get_info - request phy info
3253 * @hw: Struct containing variables accessed by shared code
3254 * @phy_info: PHY information structure
3255 *
3256 * Get PHY information from various PHY registers
3257 */
3258 s32 e1000_phy_get_info(struct e1000_hw *hw, struct e1000_phy_info *phy_info)
3259 {
3260 s32 ret_val;
3261 u16 phy_data;
3262
3263 e_dbg("e1000_phy_get_info");
3264
3265 phy_info->cable_length = e1000_cable_length_undefined;
3266 phy_info->extended_10bt_distance = e1000_10bt_ext_dist_enable_undefined;
3267 phy_info->cable_polarity = e1000_rev_polarity_undefined;
3268 phy_info->downshift = e1000_downshift_undefined;
3269 phy_info->polarity_correction = e1000_polarity_reversal_undefined;
3270 phy_info->mdix_mode = e1000_auto_x_mode_undefined;
3271 phy_info->local_rx = e1000_1000t_rx_status_undefined;
3272 phy_info->remote_rx = e1000_1000t_rx_status_undefined;
3273
3274 if (hw->media_type != e1000_media_type_copper) {
3275 e_dbg("PHY info is only valid for copper media\n");
3276 return -E1000_ERR_CONFIG;
3277 }
3278
3279 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
3280 if (ret_val)
3281 return ret_val;
3282
3283 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data);
3284 if (ret_val)
3285 return ret_val;
3286
3287 if ((phy_data & MII_SR_LINK_STATUS) != MII_SR_LINK_STATUS) {
3288 e_dbg("PHY info is only valid if link is up\n");
3289 return -E1000_ERR_CONFIG;
3290 }
3291
3292 if (hw->phy_type == e1000_phy_igp)
3293 return e1000_phy_igp_get_info(hw, phy_info);
3294 else
3295 return e1000_phy_m88_get_info(hw, phy_info);
3296 }
3297
3298 s32 e1000_validate_mdi_setting(struct e1000_hw *hw)
3299 {
3300 e_dbg("e1000_validate_mdi_settings");
3301
3302 if (!hw->autoneg && (hw->mdix == 0 || hw->mdix == 3)) {
3303 e_dbg("Invalid MDI setting detected\n");
3304 hw->mdix = 1;
3305 return -E1000_ERR_CONFIG;
3306 }
3307 return E1000_SUCCESS;
3308 }
3309
3310 /**
3311 * e1000_init_eeprom_params - initialize sw eeprom vars
3312 * @hw: Struct containing variables accessed by shared code
3313 *
3314 * Sets up eeprom variables in the hw struct. Must be called after mac_type
3315 * is configured.
3316 */
3317 s32 e1000_init_eeprom_params(struct e1000_hw *hw)
3318 {
3319 struct e1000_eeprom_info *eeprom = &hw->eeprom;
3320 u32 eecd = er32(EECD);
3321 s32 ret_val = E1000_SUCCESS;
3322 u16 eeprom_size;
3323
3324 e_dbg("e1000_init_eeprom_params");
3325
3326 switch (hw->mac_type) {
3327 case e1000_82542_rev2_0:
3328 case e1000_82542_rev2_1:
3329 case e1000_82543:
3330 case e1000_82544:
3331 eeprom->type = e1000_eeprom_microwire;
3332 eeprom->word_size = 64;
3333 eeprom->opcode_bits = 3;
3334 eeprom->address_bits = 6;
3335 eeprom->delay_usec = 50;
3336 break;
3337 case e1000_82540:
3338 case e1000_82545:
3339 case e1000_82545_rev_3:
3340 case e1000_82546:
3341 case e1000_82546_rev_3:
3342 eeprom->type = e1000_eeprom_microwire;
3343 eeprom->opcode_bits = 3;
3344 eeprom->delay_usec = 50;
3345 if (eecd & E1000_EECD_SIZE) {
3346 eeprom->word_size = 256;
3347 eeprom->address_bits = 8;
3348 } else {
3349 eeprom->word_size = 64;
3350 eeprom->address_bits = 6;
3351 }
3352 break;
3353 case e1000_82541:
3354 case e1000_82541_rev_2:
3355 case e1000_82547:
3356 case e1000_82547_rev_2:
3357 if (eecd & E1000_EECD_TYPE) {
3358 eeprom->type = e1000_eeprom_spi;
3359 eeprom->opcode_bits = 8;
3360 eeprom->delay_usec = 1;
3361 if (eecd & E1000_EECD_ADDR_BITS) {
3362 eeprom->page_size = 32;
3363 eeprom->address_bits = 16;
3364 } else {
3365 eeprom->page_size = 8;
3366 eeprom->address_bits = 8;
3367 }
3368 } else {
3369 eeprom->type = e1000_eeprom_microwire;
3370 eeprom->opcode_bits = 3;
3371 eeprom->delay_usec = 50;
3372 if (eecd & E1000_EECD_ADDR_BITS) {
3373 eeprom->word_size = 256;
3374 eeprom->address_bits = 8;
3375 } else {
3376 eeprom->word_size = 64;
3377 eeprom->address_bits = 6;
3378 }
3379 }
3380 break;
3381 default:
3382 break;
3383 }
3384
3385 if (eeprom->type == e1000_eeprom_spi) {
3386 /* eeprom_size will be an enum [0..8] that maps to eeprom sizes 128B to
3387 * 32KB (incremented by powers of 2).
3388 */
3389 /* Set to default value for initial eeprom read. */
3390 eeprom->word_size = 64;
3391 ret_val = e1000_read_eeprom(hw, EEPROM_CFG, 1, &eeprom_size);
3392 if (ret_val)
3393 return ret_val;
3394 eeprom_size =
3395 (eeprom_size & EEPROM_SIZE_MASK) >> EEPROM_SIZE_SHIFT;
3396 /* 256B eeprom size was not supported in earlier hardware, so we
3397 * bump eeprom_size up one to ensure that "1" (which maps to 256B)
3398 * is never the result used in the shifting logic below. */
3399 if (eeprom_size)
3400 eeprom_size++;
3401
3402 eeprom->word_size = 1 << (eeprom_size + EEPROM_WORD_SIZE_SHIFT);
3403 }
3404 return ret_val;
3405 }
3406
3407 /**
3408 * e1000_raise_ee_clk - Raises the EEPROM's clock input.
3409 * @hw: Struct containing variables accessed by shared code
3410 * @eecd: EECD's current value
3411 */
3412 static void e1000_raise_ee_clk(struct e1000_hw *hw, u32 *eecd)
3413 {
3414 /* Raise the clock input to the EEPROM (by setting the SK bit), and then
3415 * wait <delay> microseconds.
3416 */
3417 *eecd = *eecd | E1000_EECD_SK;
3418 ew32(EECD, *eecd);
3419 E1000_WRITE_FLUSH();
3420 udelay(hw->eeprom.delay_usec);
3421 }
3422
3423 /**
3424 * e1000_lower_ee_clk - Lowers the EEPROM's clock input.
3425 * @hw: Struct containing variables accessed by shared code
3426 * @eecd: EECD's current value
3427 */
3428 static void e1000_lower_ee_clk(struct e1000_hw *hw, u32 *eecd)
3429 {
3430 /* Lower the clock input to the EEPROM (by clearing the SK bit), and then
3431 * wait 50 microseconds.
3432 */
3433 *eecd = *eecd & ~E1000_EECD_SK;
3434 ew32(EECD, *eecd);
3435 E1000_WRITE_FLUSH();
3436 udelay(hw->eeprom.delay_usec);
3437 }
3438
3439 /**
3440 * e1000_shift_out_ee_bits - Shift data bits out to the EEPROM.
3441 * @hw: Struct containing variables accessed by shared code
3442 * @data: data to send to the EEPROM
3443 * @count: number of bits to shift out
3444 */
3445 static void e1000_shift_out_ee_bits(struct e1000_hw *hw, u16 data, u16 count)
3446 {
3447 struct e1000_eeprom_info *eeprom = &hw->eeprom;
3448 u32 eecd;
3449 u32 mask;
3450
3451 /* We need to shift "count" bits out to the EEPROM. So, value in the
3452 * "data" parameter will be shifted out to the EEPROM one bit at a time.
3453 * In order to do this, "data" must be broken down into bits.
3454 */
3455 mask = 0x01 << (count - 1);
3456 eecd = er32(EECD);
3457 if (eeprom->type == e1000_eeprom_microwire) {
3458 eecd &= ~E1000_EECD_DO;
3459 } else if (eeprom->type == e1000_eeprom_spi) {
3460 eecd |= E1000_EECD_DO;
3461 }
3462 do {
3463 /* A "1" is shifted out to the EEPROM by setting bit "DI" to a "1",
3464 * and then raising and then lowering the clock (the SK bit controls
3465 * the clock input to the EEPROM). A "0" is shifted out to the EEPROM
3466 * by setting "DI" to "0" and then raising and then lowering the clock.
3467 */
3468 eecd &= ~E1000_EECD_DI;
3469
3470 if (data & mask)
3471 eecd |= E1000_EECD_DI;
3472
3473 ew32(EECD, eecd);
3474 E1000_WRITE_FLUSH();
3475
3476 udelay(eeprom->delay_usec);
3477
3478 e1000_raise_ee_clk(hw, &eecd);
3479 e1000_lower_ee_clk(hw, &eecd);
3480
3481 mask = mask >> 1;
3482
3483 } while (mask);
3484
3485 /* We leave the "DI" bit set to "0" when we leave this routine. */
3486 eecd &= ~E1000_EECD_DI;
3487 ew32(EECD, eecd);
3488 }
3489
3490 /**
3491 * e1000_shift_in_ee_bits - Shift data bits in from the EEPROM
3492 * @hw: Struct containing variables accessed by shared code
3493 * @count: number of bits to shift in
3494 */
3495 static u16 e1000_shift_in_ee_bits(struct e1000_hw *hw, u16 count)
3496 {
3497 u32 eecd;
3498 u32 i;
3499 u16 data;
3500
3501 /* In order to read a register from the EEPROM, we need to shift 'count'
3502 * bits in from the EEPROM. Bits are "shifted in" by raising the clock
3503 * input to the EEPROM (setting the SK bit), and then reading the value of
3504 * the "DO" bit. During this "shifting in" process the "DI" bit should
3505 * always be clear.
3506 */
3507
3508 eecd = er32(EECD);
3509
3510 eecd &= ~(E1000_EECD_DO | E1000_EECD_DI);
3511 data = 0;
3512
3513 for (i = 0; i < count; i++) {
3514 data = data << 1;
3515 e1000_raise_ee_clk(hw, &eecd);
3516
3517 eecd = er32(EECD);
3518
3519 eecd &= ~(E1000_EECD_DI);
3520 if (eecd & E1000_EECD_DO)
3521 data |= 1;
3522
3523 e1000_lower_ee_clk(hw, &eecd);
3524 }
3525
3526 return data;
3527 }
3528
3529 /**
3530 * e1000_acquire_eeprom - Prepares EEPROM for access
3531 * @hw: Struct containing variables accessed by shared code
3532 *
3533 * Lowers EEPROM clock. Clears input pin. Sets the chip select pin. This
3534 * function should be called before issuing a command to the EEPROM.
3535 */
3536 static s32 e1000_acquire_eeprom(struct e1000_hw *hw)
3537 {
3538 struct e1000_eeprom_info *eeprom = &hw->eeprom;
3539 u32 eecd, i = 0;
3540
3541 e_dbg("e1000_acquire_eeprom");
3542
3543 eecd = er32(EECD);
3544
3545 /* Request EEPROM Access */
3546 if (hw->mac_type > e1000_82544) {
3547 eecd |= E1000_EECD_REQ;
3548 ew32(EECD, eecd);
3549 eecd = er32(EECD);
3550 while ((!(eecd & E1000_EECD_GNT)) &&
3551 (i < E1000_EEPROM_GRANT_ATTEMPTS)) {
3552 i++;
3553 udelay(5);
3554 eecd = er32(EECD);
3555 }
3556 if (!(eecd & E1000_EECD_GNT)) {
3557 eecd &= ~E1000_EECD_REQ;
3558 ew32(EECD, eecd);
3559 e_dbg("Could not acquire EEPROM grant\n");
3560 return -E1000_ERR_EEPROM;
3561 }
3562 }
3563
3564 /* Setup EEPROM for Read/Write */
3565
3566 if (eeprom->type == e1000_eeprom_microwire) {
3567 /* Clear SK and DI */
3568 eecd &= ~(E1000_EECD_DI | E1000_EECD_SK);
3569 ew32(EECD, eecd);
3570
3571 /* Set CS */
3572 eecd |= E1000_EECD_CS;
3573 ew32(EECD, eecd);
3574 } else if (eeprom->type == e1000_eeprom_spi) {
3575 /* Clear SK and CS */
3576 eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
3577 ew32(EECD, eecd);
3578 udelay(1);
3579 }
3580
3581 return E1000_SUCCESS;
3582 }
3583
3584 /**
3585 * e1000_standby_eeprom - Returns EEPROM to a "standby" state
3586 * @hw: Struct containing variables accessed by shared code
3587 */
3588 static void e1000_standby_eeprom(struct e1000_hw *hw)
3589 {
3590 struct e1000_eeprom_info *eeprom = &hw->eeprom;
3591 u32 eecd;
3592
3593 eecd = er32(EECD);
3594
3595 if (eeprom->type == e1000_eeprom_microwire) {
3596 eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
3597 ew32(EECD, eecd);
3598 E1000_WRITE_FLUSH();
3599 udelay(eeprom->delay_usec);
3600
3601 /* Clock high */
3602 eecd |= E1000_EECD_SK;
3603 ew32(EECD, eecd);
3604 E1000_WRITE_FLUSH();
3605 udelay(eeprom->delay_usec);
3606
3607 /* Select EEPROM */
3608 eecd |= E1000_EECD_CS;
3609 ew32(EECD, eecd);
3610 E1000_WRITE_FLUSH();
3611 udelay(eeprom->delay_usec);
3612
3613 /* Clock low */
3614 eecd &= ~E1000_EECD_SK;
3615 ew32(EECD, eecd);
3616 E1000_WRITE_FLUSH();
3617 udelay(eeprom->delay_usec);
3618 } else if (eeprom->type == e1000_eeprom_spi) {
3619 /* Toggle CS to flush commands */
3620 eecd |= E1000_EECD_CS;
3621 ew32(EECD, eecd);
3622 E1000_WRITE_FLUSH();
3623 udelay(eeprom->delay_usec);
3624 eecd &= ~E1000_EECD_CS;
3625 ew32(EECD, eecd);
3626 E1000_WRITE_FLUSH();
3627 udelay(eeprom->delay_usec);
3628 }
3629 }
3630
3631 /**
3632 * e1000_release_eeprom - drop chip select
3633 * @hw: Struct containing variables accessed by shared code
3634 *
3635 * Terminates a command by inverting the EEPROM's chip select pin
3636 */
3637 static void e1000_release_eeprom(struct e1000_hw *hw)
3638 {
3639 u32 eecd;
3640
3641 e_dbg("e1000_release_eeprom");
3642
3643 eecd = er32(EECD);
3644
3645 if (hw->eeprom.type == e1000_eeprom_spi) {
3646 eecd |= E1000_EECD_CS; /* Pull CS high */
3647 eecd &= ~E1000_EECD_SK; /* Lower SCK */
3648
3649 ew32(EECD, eecd);
3650
3651 udelay(hw->eeprom.delay_usec);
3652 } else if (hw->eeprom.type == e1000_eeprom_microwire) {
3653 /* cleanup eeprom */
3654
3655 /* CS on Microwire is active-high */
3656 eecd &= ~(E1000_EECD_CS | E1000_EECD_DI);
3657
3658 ew32(EECD, eecd);
3659
3660 /* Rising edge of clock */
3661 eecd |= E1000_EECD_SK;
3662 ew32(EECD, eecd);
3663 E1000_WRITE_FLUSH();
3664 udelay(hw->eeprom.delay_usec);
3665
3666 /* Falling edge of clock */
3667 eecd &= ~E1000_EECD_SK;
3668 ew32(EECD, eecd);
3669 E1000_WRITE_FLUSH();
3670 udelay(hw->eeprom.delay_usec);
3671 }
3672
3673 /* Stop requesting EEPROM access */
3674 if (hw->mac_type > e1000_82544) {
3675 eecd &= ~E1000_EECD_REQ;
3676 ew32(EECD, eecd);
3677 }
3678 }
3679
3680 /**
3681 * e1000_spi_eeprom_ready - Reads a 16 bit word from the EEPROM.
3682 * @hw: Struct containing variables accessed by shared code
3683 */
3684 static s32 e1000_spi_eeprom_ready(struct e1000_hw *hw)
3685 {
3686 u16 retry_count = 0;
3687 u8 spi_stat_reg;
3688
3689 e_dbg("e1000_spi_eeprom_ready");
3690
3691 /* Read "Status Register" repeatedly until the LSB is cleared. The
3692 * EEPROM will signal that the command has been completed by clearing
3693 * bit 0 of the internal status register. If it's not cleared within
3694 * 5 milliseconds, then error out.
3695 */
3696 retry_count = 0;
3697 do {
3698 e1000_shift_out_ee_bits(hw, EEPROM_RDSR_OPCODE_SPI,
3699 hw->eeprom.opcode_bits);
3700 spi_stat_reg = (u8) e1000_shift_in_ee_bits(hw, 8);
3701 if (!(spi_stat_reg & EEPROM_STATUS_RDY_SPI))
3702 break;
3703
3704 udelay(5);
3705 retry_count += 5;
3706
3707 e1000_standby_eeprom(hw);
3708 } while (retry_count < EEPROM_MAX_RETRY_SPI);
3709
3710 /* ATMEL SPI write time could vary from 0-20mSec on 3.3V devices (and
3711 * only 0-5mSec on 5V devices)
3712 */
3713 if (retry_count >= EEPROM_MAX_RETRY_SPI) {
3714 e_dbg("SPI EEPROM Status error\n");
3715 return -E1000_ERR_EEPROM;
3716 }
3717
3718 return E1000_SUCCESS;
3719 }
3720
3721 /**
3722 * e1000_read_eeprom - Reads a 16 bit word from the EEPROM.
3723 * @hw: Struct containing variables accessed by shared code
3724 * @offset: offset of word in the EEPROM to read
3725 * @data: word read from the EEPROM
3726 * @words: number of words to read
3727 */
3728 s32 e1000_read_eeprom(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
3729 {
3730 s32 ret;
3731 spin_lock(&e1000_eeprom_lock);
3732 ret = e1000_do_read_eeprom(hw, offset, words, data);
3733 spin_unlock(&e1000_eeprom_lock);
3734 return ret;
3735 }
3736
3737 static s32 e1000_do_read_eeprom(struct e1000_hw *hw, u16 offset, u16 words,
3738 u16 *data)
3739 {
3740 struct e1000_eeprom_info *eeprom = &hw->eeprom;
3741 u32 i = 0;
3742
3743 e_dbg("e1000_read_eeprom");
3744
3745 /* If eeprom is not yet detected, do so now */
3746 if (eeprom->word_size == 0)
3747 e1000_init_eeprom_params(hw);
3748
3749 /* A check for invalid values: offset too large, too many words, and not
3750 * enough words.
3751 */
3752 if ((offset >= eeprom->word_size)
3753 || (words > eeprom->word_size - offset) || (words == 0)) {
3754 e_dbg("\"words\" parameter out of bounds. Words = %d,"
3755 "size = %d\n", offset, eeprom->word_size);
3756 return -E1000_ERR_EEPROM;
3757 }
3758
3759 /* EEPROM's that don't use EERD to read require us to bit-bang the SPI
3760 * directly. In this case, we need to acquire the EEPROM so that
3761 * FW or other port software does not interrupt.
3762 */
3763 /* Prepare the EEPROM for bit-bang reading */
3764 if (e1000_acquire_eeprom(hw) != E1000_SUCCESS)
3765 return -E1000_ERR_EEPROM;
3766
3767 /* Set up the SPI or Microwire EEPROM for bit-bang reading. We have
3768 * acquired the EEPROM at this point, so any returns should release it */
3769 if (eeprom->type == e1000_eeprom_spi) {
3770 u16 word_in;
3771 u8 read_opcode = EEPROM_READ_OPCODE_SPI;
3772
3773 if (e1000_spi_eeprom_ready(hw)) {
3774 e1000_release_eeprom(hw);
3775 return -E1000_ERR_EEPROM;
3776 }
3777
3778 e1000_standby_eeprom(hw);
3779
3780 /* Some SPI eeproms use the 8th address bit embedded in the opcode */
3781 if ((eeprom->address_bits == 8) && (offset >= 128))
3782 read_opcode |= EEPROM_A8_OPCODE_SPI;
3783
3784 /* Send the READ command (opcode + addr) */
3785 e1000_shift_out_ee_bits(hw, read_opcode, eeprom->opcode_bits);
3786 e1000_shift_out_ee_bits(hw, (u16) (offset * 2),
3787 eeprom->address_bits);
3788
3789 /* Read the data. The address of the eeprom internally increments with
3790 * each byte (spi) being read, saving on the overhead of eeprom setup
3791 * and tear-down. The address counter will roll over if reading beyond
3792 * the size of the eeprom, thus allowing the entire memory to be read
3793 * starting from any offset. */
3794 for (i = 0; i < words; i++) {
3795 word_in = e1000_shift_in_ee_bits(hw, 16);
3796 data[i] = (word_in >> 8) | (word_in << 8);
3797 }
3798 } else if (eeprom->type == e1000_eeprom_microwire) {
3799 for (i = 0; i < words; i++) {
3800 /* Send the READ command (opcode + addr) */
3801 e1000_shift_out_ee_bits(hw,
3802 EEPROM_READ_OPCODE_MICROWIRE,
3803 eeprom->opcode_bits);
3804 e1000_shift_out_ee_bits(hw, (u16) (offset + i),
3805 eeprom->address_bits);
3806
3807 /* Read the data. For microwire, each word requires the overhead
3808 * of eeprom setup and tear-down. */
3809 data[i] = e1000_shift_in_ee_bits(hw, 16);
3810 e1000_standby_eeprom(hw);
3811 }
3812 }
3813
3814 /* End this read operation */
3815 e1000_release_eeprom(hw);
3816
3817 return E1000_SUCCESS;
3818 }
3819
3820 /**
3821 * e1000_validate_eeprom_checksum - Verifies that the EEPROM has a valid checksum
3822 * @hw: Struct containing variables accessed by shared code
3823 *
3824 * Reads the first 64 16 bit words of the EEPROM and sums the values read.
3825 * If the the sum of the 64 16 bit words is 0xBABA, the EEPROM's checksum is
3826 * valid.
3827 */
3828 s32 e1000_validate_eeprom_checksum(struct e1000_hw *hw)
3829 {
3830 u16 checksum = 0;
3831 u16 i, eeprom_data;
3832
3833 e_dbg("e1000_validate_eeprom_checksum");
3834
3835 for (i = 0; i < (EEPROM_CHECKSUM_REG + 1); i++) {
3836 if (e1000_read_eeprom(hw, i, 1, &eeprom_data) < 0) {
3837 e_dbg("EEPROM Read Error\n");
3838 return -E1000_ERR_EEPROM;
3839 }
3840 checksum += eeprom_data;
3841 }
3842
3843 if (checksum == (u16) EEPROM_SUM)
3844 return E1000_SUCCESS;
3845 else {
3846 e_dbg("EEPROM Checksum Invalid\n");
3847 return -E1000_ERR_EEPROM;
3848 }
3849 }
3850
3851 /**
3852 * e1000_update_eeprom_checksum - Calculates/writes the EEPROM checksum
3853 * @hw: Struct containing variables accessed by shared code
3854 *
3855 * Sums the first 63 16 bit words of the EEPROM. Subtracts the sum from 0xBABA.
3856 * Writes the difference to word offset 63 of the EEPROM.
3857 */
3858 s32 e1000_update_eeprom_checksum(struct e1000_hw *hw)
3859 {
3860 u16 checksum = 0;
3861 u16 i, eeprom_data;
3862
3863 e_dbg("e1000_update_eeprom_checksum");
3864
3865 for (i = 0; i < EEPROM_CHECKSUM_REG; i++) {
3866 if (e1000_read_eeprom(hw, i, 1, &eeprom_data) < 0) {
3867 e_dbg("EEPROM Read Error\n");
3868 return -E1000_ERR_EEPROM;
3869 }
3870 checksum += eeprom_data;
3871 }
3872 checksum = (u16) EEPROM_SUM - checksum;
3873 if (e1000_write_eeprom(hw, EEPROM_CHECKSUM_REG, 1, &checksum) < 0) {
3874 e_dbg("EEPROM Write Error\n");
3875 return -E1000_ERR_EEPROM;
3876 }
3877 return E1000_SUCCESS;
3878 }
3879
3880 /**
3881 * e1000_write_eeprom - write words to the different EEPROM types.
3882 * @hw: Struct containing variables accessed by shared code
3883 * @offset: offset within the EEPROM to be written to
3884 * @words: number of words to write
3885 * @data: 16 bit word to be written to the EEPROM
3886 *
3887 * If e1000_update_eeprom_checksum is not called after this function, the
3888 * EEPROM will most likely contain an invalid checksum.
3889 */
3890 s32 e1000_write_eeprom(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
3891 {
3892 s32 ret;
3893 spin_lock(&e1000_eeprom_lock);
3894 ret = e1000_do_write_eeprom(hw, offset, words, data);
3895 spin_unlock(&e1000_eeprom_lock);
3896 return ret;
3897 }
3898
3899 static s32 e1000_do_write_eeprom(struct e1000_hw *hw, u16 offset, u16 words,
3900 u16 *data)
3901 {
3902 struct e1000_eeprom_info *eeprom = &hw->eeprom;
3903 s32 status = 0;
3904
3905 e_dbg("e1000_write_eeprom");
3906
3907 /* If eeprom is not yet detected, do so now */
3908 if (eeprom->word_size == 0)
3909 e1000_init_eeprom_params(hw);
3910
3911 /* A check for invalid values: offset too large, too many words, and not
3912 * enough words.
3913 */
3914 if ((offset >= eeprom->word_size)
3915 || (words > eeprom->word_size - offset) || (words == 0)) {
3916 e_dbg("\"words\" parameter out of bounds\n");
3917 return -E1000_ERR_EEPROM;
3918 }
3919
3920 /* Prepare the EEPROM for writing */
3921 if (e1000_acquire_eeprom(hw) != E1000_SUCCESS)
3922 return -E1000_ERR_EEPROM;
3923
3924 if (eeprom->type == e1000_eeprom_microwire) {
3925 status = e1000_write_eeprom_microwire(hw, offset, words, data);
3926 } else {
3927 status = e1000_write_eeprom_spi(hw, offset, words, data);
3928 msleep(10);
3929 }
3930
3931 /* Done with writing */
3932 e1000_release_eeprom(hw);
3933
3934 return status;
3935 }
3936
3937 /**
3938 * e1000_write_eeprom_spi - Writes a 16 bit word to a given offset in an SPI EEPROM.
3939 * @hw: Struct containing variables accessed by shared code
3940 * @offset: offset within the EEPROM to be written to
3941 * @words: number of words to write
3942 * @data: pointer to array of 8 bit words to be written to the EEPROM
3943 */
3944 static s32 e1000_write_eeprom_spi(struct e1000_hw *hw, u16 offset, u16 words,
3945 u16 *data)
3946 {
3947 struct e1000_eeprom_info *eeprom = &hw->eeprom;
3948 u16 widx = 0;
3949
3950 e_dbg("e1000_write_eeprom_spi");
3951
3952 while (widx < words) {
3953 u8 write_opcode = EEPROM_WRITE_OPCODE_SPI;
3954
3955 if (e1000_spi_eeprom_ready(hw))
3956 return -E1000_ERR_EEPROM;
3957
3958 e1000_standby_eeprom(hw);
3959
3960 /* Send the WRITE ENABLE command (8 bit opcode ) */
3961 e1000_shift_out_ee_bits(hw, EEPROM_WREN_OPCODE_SPI,
3962 eeprom->opcode_bits);
3963
3964 e1000_standby_eeprom(hw);
3965
3966 /* Some SPI eeproms use the 8th address bit embedded in the opcode */
3967 if ((eeprom->address_bits == 8) && (offset >= 128))
3968 write_opcode |= EEPROM_A8_OPCODE_SPI;
3969
3970 /* Send the Write command (8-bit opcode + addr) */
3971 e1000_shift_out_ee_bits(hw, write_opcode, eeprom->opcode_bits);
3972
3973 e1000_shift_out_ee_bits(hw, (u16) ((offset + widx) * 2),
3974 eeprom->address_bits);
3975
3976 /* Send the data */
3977
3978 /* Loop to allow for up to whole page write (32 bytes) of eeprom */
3979 while (widx < words) {
3980 u16 word_out = data[widx];
3981 word_out = (word_out >> 8) | (word_out << 8);
3982 e1000_shift_out_ee_bits(hw, word_out, 16);
3983 widx++;
3984
3985 /* Some larger eeprom sizes are capable of a 32-byte PAGE WRITE
3986 * operation, while the smaller eeproms are capable of an 8-byte
3987 * PAGE WRITE operation. Break the inner loop to pass new address
3988 */
3989 if ((((offset + widx) * 2) % eeprom->page_size) == 0) {
3990 e1000_standby_eeprom(hw);
3991 break;
3992 }
3993 }
3994 }
3995
3996 return E1000_SUCCESS;
3997 }
3998
3999 /**
4000 * e1000_write_eeprom_microwire - Writes a 16 bit word to a given offset in a Microwire EEPROM.
4001 * @hw: Struct containing variables accessed by shared code
4002 * @offset: offset within the EEPROM to be written to
4003 * @words: number of words to write
4004 * @data: pointer to array of 8 bit words to be written to the EEPROM
4005 */
4006 static s32 e1000_write_eeprom_microwire(struct e1000_hw *hw, u16 offset,
4007 u16 words, u16 *data)
4008 {
4009 struct e1000_eeprom_info *eeprom = &hw->eeprom;
4010 u32 eecd;
4011 u16 words_written = 0;
4012 u16 i = 0;
4013
4014 e_dbg("e1000_write_eeprom_microwire");
4015
4016 /* Send the write enable command to the EEPROM (3-bit opcode plus
4017 * 6/8-bit dummy address beginning with 11). It's less work to include
4018 * the 11 of the dummy address as part of the opcode than it is to shift
4019 * it over the correct number of bits for the address. This puts the
4020 * EEPROM into write/erase mode.
4021 */
4022 e1000_shift_out_ee_bits(hw, EEPROM_EWEN_OPCODE_MICROWIRE,
4023 (u16) (eeprom->opcode_bits + 2));
4024
4025 e1000_shift_out_ee_bits(hw, 0, (u16) (eeprom->address_bits - 2));
4026
4027 /* Prepare the EEPROM */
4028 e1000_standby_eeprom(hw);
4029
4030 while (words_written < words) {
4031 /* Send the Write command (3-bit opcode + addr) */
4032 e1000_shift_out_ee_bits(hw, EEPROM_WRITE_OPCODE_MICROWIRE,
4033 eeprom->opcode_bits);
4034
4035 e1000_shift_out_ee_bits(hw, (u16) (offset + words_written),
4036 eeprom->address_bits);
4037
4038 /* Send the data */
4039 e1000_shift_out_ee_bits(hw, data[words_written], 16);
4040
4041 /* Toggle the CS line. This in effect tells the EEPROM to execute
4042 * the previous command.
4043 */
4044 e1000_standby_eeprom(hw);
4045
4046 /* Read DO repeatedly until it is high (equal to '1'). The EEPROM will
4047 * signal that the command has been completed by raising the DO signal.
4048 * If DO does not go high in 10 milliseconds, then error out.
4049 */
4050 for (i = 0; i < 200; i++) {
4051 eecd = er32(EECD);
4052 if (eecd & E1000_EECD_DO)
4053 break;
4054 udelay(50);
4055 }
4056 if (i == 200) {
4057 e_dbg("EEPROM Write did not complete\n");
4058 return -E1000_ERR_EEPROM;
4059 }
4060
4061 /* Recover from write */
4062 e1000_standby_eeprom(hw);
4063
4064 words_written++;
4065 }
4066
4067 /* Send the write disable command to the EEPROM (3-bit opcode plus
4068 * 6/8-bit dummy address beginning with 10). It's less work to include
4069 * the 10 of the dummy address as part of the opcode than it is to shift
4070 * it over the correct number of bits for the address. This takes the
4071 * EEPROM out of write/erase mode.
4072 */
4073 e1000_shift_out_ee_bits(hw, EEPROM_EWDS_OPCODE_MICROWIRE,
4074 (u16) (eeprom->opcode_bits + 2));
4075
4076 e1000_shift_out_ee_bits(hw, 0, (u16) (eeprom->address_bits - 2));
4077
4078 return E1000_SUCCESS;
4079 }
4080
4081 /**
4082 * e1000_read_mac_addr - read the adapters MAC from eeprom
4083 * @hw: Struct containing variables accessed by shared code
4084 *
4085 * Reads the adapter's MAC address from the EEPROM and inverts the LSB for the
4086 * second function of dual function devices
4087 */
4088 s32 e1000_read_mac_addr(struct e1000_hw *hw)
4089 {
4090 u16 offset;
4091 u16 eeprom_data, i;
4092
4093 e_dbg("e1000_read_mac_addr");
4094
4095 for (i = 0; i < NODE_ADDRESS_SIZE; i += 2) {
4096 offset = i >> 1;
4097 if (e1000_read_eeprom(hw, offset, 1, &eeprom_data) < 0) {
4098 e_dbg("EEPROM Read Error\n");
4099 return -E1000_ERR_EEPROM;
4100 }
4101 hw->perm_mac_addr[i] = (u8) (eeprom_data & 0x00FF);
4102 hw->perm_mac_addr[i + 1] = (u8) (eeprom_data >> 8);
4103 }
4104
4105 switch (hw->mac_type) {
4106 default:
4107 break;
4108 case e1000_82546:
4109 case e1000_82546_rev_3:
4110 if (er32(STATUS) & E1000_STATUS_FUNC_1)
4111 hw->perm_mac_addr[5] ^= 0x01;
4112 break;
4113 }
4114
4115 for (i = 0; i < NODE_ADDRESS_SIZE; i++)
4116 hw->mac_addr[i] = hw->perm_mac_addr[i];
4117 return E1000_SUCCESS;
4118 }
4119
4120 /**
4121 * e1000_init_rx_addrs - Initializes receive address filters.
4122 * @hw: Struct containing variables accessed by shared code
4123 *
4124 * Places the MAC address in receive address register 0 and clears the rest
4125 * of the receive address registers. Clears the multicast table. Assumes
4126 * the receiver is in reset when the routine is called.
4127 */
4128 static void e1000_init_rx_addrs(struct e1000_hw *hw)
4129 {
4130 u32 i;
4131 u32 rar_num;
4132
4133 e_dbg("e1000_init_rx_addrs");
4134
4135 /* Setup the receive address. */
4136 e_dbg("Programming MAC Address into RAR[0]\n");
4137
4138 e1000_rar_set(hw, hw->mac_addr, 0);
4139
4140 rar_num = E1000_RAR_ENTRIES;
4141
4142 /* Zero out the other 15 receive addresses. */
4143 e_dbg("Clearing RAR[1-15]\n");
4144 for (i = 1; i < rar_num; i++) {
4145 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1), 0);
4146 E1000_WRITE_FLUSH();
4147 E1000_WRITE_REG_ARRAY(hw, RA, ((i << 1) + 1), 0);
4148 E1000_WRITE_FLUSH();
4149 }
4150 }
4151
4152 /**
4153 * e1000_hash_mc_addr - Hashes an address to determine its location in the multicast table
4154 * @hw: Struct containing variables accessed by shared code
4155 * @mc_addr: the multicast address to hash
4156 */
4157 u32 e1000_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr)
4158 {
4159 u32 hash_value = 0;
4160
4161 /* The portion of the address that is used for the hash table is
4162 * determined by the mc_filter_type setting.
4163 */
4164 switch (hw->mc_filter_type) {
4165 /* [0] [1] [2] [3] [4] [5]
4166 * 01 AA 00 12 34 56
4167 * LSB MSB
4168 */
4169 case 0:
4170 /* [47:36] i.e. 0x563 for above example address */
4171 hash_value = ((mc_addr[4] >> 4) | (((u16) mc_addr[5]) << 4));
4172 break;
4173 case 1:
4174 /* [46:35] i.e. 0xAC6 for above example address */
4175 hash_value = ((mc_addr[4] >> 3) | (((u16) mc_addr[5]) << 5));
4176 break;
4177 case 2:
4178 /* [45:34] i.e. 0x5D8 for above example address */
4179 hash_value = ((mc_addr[4] >> 2) | (((u16) mc_addr[5]) << 6));
4180 break;
4181 case 3:
4182 /* [43:32] i.e. 0x634 for above example address */
4183 hash_value = ((mc_addr[4]) | (((u16) mc_addr[5]) << 8));
4184 break;
4185 }
4186
4187 hash_value &= 0xFFF;
4188 return hash_value;
4189 }
4190
4191 /**
4192 * e1000_rar_set - Puts an ethernet address into a receive address register.
4193 * @hw: Struct containing variables accessed by shared code
4194 * @addr: Address to put into receive address register
4195 * @index: Receive address register to write
4196 */
4197 void e1000_rar_set(struct e1000_hw *hw, u8 *addr, u32 index)
4198 {
4199 u32 rar_low, rar_high;
4200
4201 /* HW expects these in little endian so we reverse the byte order
4202 * from network order (big endian) to little endian
4203 */
4204 rar_low = ((u32) addr[0] | ((u32) addr[1] << 8) |
4205 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
4206 rar_high = ((u32) addr[4] | ((u32) addr[5] << 8));
4207
4208 /* Disable Rx and flush all Rx frames before enabling RSS to avoid Rx
4209 * unit hang.
4210 *
4211 * Description:
4212 * If there are any Rx frames queued up or otherwise present in the HW
4213 * before RSS is enabled, and then we enable RSS, the HW Rx unit will
4214 * hang. To work around this issue, we have to disable receives and
4215 * flush out all Rx frames before we enable RSS. To do so, we modify we
4216 * redirect all Rx traffic to manageability and then reset the HW.
4217 * This flushes away Rx frames, and (since the redirections to
4218 * manageability persists across resets) keeps new ones from coming in
4219 * while we work. Then, we clear the Address Valid AV bit for all MAC
4220 * addresses and undo the re-direction to manageability.
4221 * Now, frames are coming in again, but the MAC won't accept them, so
4222 * far so good. We now proceed to initialize RSS (if necessary) and
4223 * configure the Rx unit. Last, we re-enable the AV bits and continue
4224 * on our merry way.
4225 */
4226 switch (hw->mac_type) {
4227 default:
4228 /* Indicate to hardware the Address is Valid. */
4229 rar_high |= E1000_RAH_AV;
4230 break;
4231 }
4232
4233 E1000_WRITE_REG_ARRAY(hw, RA, (index << 1), rar_low);
4234 E1000_WRITE_FLUSH();
4235 E1000_WRITE_REG_ARRAY(hw, RA, ((index << 1) + 1), rar_high);
4236 E1000_WRITE_FLUSH();
4237 }
4238
4239 /**
4240 * e1000_write_vfta - Writes a value to the specified offset in the VLAN filter table.
4241 * @hw: Struct containing variables accessed by shared code
4242 * @offset: Offset in VLAN filer table to write
4243 * @value: Value to write into VLAN filter table
4244 */
4245 void e1000_write_vfta(struct e1000_hw *hw, u32 offset, u32 value)
4246 {
4247 u32 temp;
4248
4249 if ((hw->mac_type == e1000_82544) && ((offset & 0x1) == 1)) {
4250 temp = E1000_READ_REG_ARRAY(hw, VFTA, (offset - 1));
4251 E1000_WRITE_REG_ARRAY(hw, VFTA, offset, value);
4252 E1000_WRITE_FLUSH();
4253 E1000_WRITE_REG_ARRAY(hw, VFTA, (offset - 1), temp);
4254 E1000_WRITE_FLUSH();
4255 } else {
4256 E1000_WRITE_REG_ARRAY(hw, VFTA, offset, value);
4257 E1000_WRITE_FLUSH();
4258 }
4259 }
4260
4261 /**
4262 * e1000_clear_vfta - Clears the VLAN filer table
4263 * @hw: Struct containing variables accessed by shared code
4264 */
4265 static void e1000_clear_vfta(struct e1000_hw *hw)
4266 {
4267 u32 offset;
4268 u32 vfta_value = 0;
4269 u32 vfta_offset = 0;
4270 u32 vfta_bit_in_reg = 0;
4271
4272 for (offset = 0; offset < E1000_VLAN_FILTER_TBL_SIZE; offset++) {
4273 /* If the offset we want to clear is the same offset of the
4274 * manageability VLAN ID, then clear all bits except that of the
4275 * manageability unit */
4276 vfta_value = (offset == vfta_offset) ? vfta_bit_in_reg : 0;
4277 E1000_WRITE_REG_ARRAY(hw, VFTA, offset, vfta_value);
4278 E1000_WRITE_FLUSH();
4279 }
4280 }
4281
4282 static s32 e1000_id_led_init(struct e1000_hw *hw)
4283 {
4284 u32 ledctl;
4285 const u32 ledctl_mask = 0x000000FF;
4286 const u32 ledctl_on = E1000_LEDCTL_MODE_LED_ON;
4287 const u32 ledctl_off = E1000_LEDCTL_MODE_LED_OFF;
4288 u16 eeprom_data, i, temp;
4289 const u16 led_mask = 0x0F;
4290
4291 e_dbg("e1000_id_led_init");
4292
4293 if (hw->mac_type < e1000_82540) {
4294 /* Nothing to do */
4295 return E1000_SUCCESS;
4296 }
4297
4298 ledctl = er32(LEDCTL);
4299 hw->ledctl_default = ledctl;
4300 hw->ledctl_mode1 = hw->ledctl_default;
4301 hw->ledctl_mode2 = hw->ledctl_default;
4302
4303 if (e1000_read_eeprom(hw, EEPROM_ID_LED_SETTINGS, 1, &eeprom_data) < 0) {
4304 e_dbg("EEPROM Read Error\n");
4305 return -E1000_ERR_EEPROM;
4306 }
4307
4308 if ((eeprom_data == ID_LED_RESERVED_0000) ||
4309 (eeprom_data == ID_LED_RESERVED_FFFF)) {
4310 eeprom_data = ID_LED_DEFAULT;
4311 }
4312
4313 for (i = 0; i < 4; i++) {
4314 temp = (eeprom_data >> (i << 2)) & led_mask;
4315 switch (temp) {
4316 case ID_LED_ON1_DEF2:
4317 case ID_LED_ON1_ON2:
4318 case ID_LED_ON1_OFF2:
4319 hw->ledctl_mode1 &= ~(ledctl_mask << (i << 3));
4320 hw->ledctl_mode1 |= ledctl_on << (i << 3);
4321 break;
4322 case ID_LED_OFF1_DEF2:
4323 case ID_LED_OFF1_ON2:
4324 case ID_LED_OFF1_OFF2:
4325 hw->ledctl_mode1 &= ~(ledctl_mask << (i << 3));
4326 hw->ledctl_mode1 |= ledctl_off << (i << 3);
4327 break;
4328 default:
4329 /* Do nothing */
4330 break;
4331 }
4332 switch (temp) {
4333 case ID_LED_DEF1_ON2:
4334 case ID_LED_ON1_ON2:
4335 case ID_LED_OFF1_ON2:
4336 hw->ledctl_mode2 &= ~(ledctl_mask << (i << 3));
4337 hw->ledctl_mode2 |= ledctl_on << (i << 3);
4338 break;
4339 case ID_LED_DEF1_OFF2:
4340 case ID_LED_ON1_OFF2:
4341 case ID_LED_OFF1_OFF2:
4342 hw->ledctl_mode2 &= ~(ledctl_mask << (i << 3));
4343 hw->ledctl_mode2 |= ledctl_off << (i << 3);
4344 break;
4345 default:
4346 /* Do nothing */
4347 break;
4348 }
4349 }
4350 return E1000_SUCCESS;
4351 }
4352
4353 /**
4354 * e1000_setup_led
4355 * @hw: Struct containing variables accessed by shared code
4356 *
4357 * Prepares SW controlable LED for use and saves the current state of the LED.
4358 */
4359 s32 e1000_setup_led(struct e1000_hw *hw)
4360 {
4361 u32 ledctl;
4362 s32 ret_val = E1000_SUCCESS;
4363
4364 e_dbg("e1000_setup_led");
4365
4366 switch (hw->mac_type) {
4367 case e1000_82542_rev2_0:
4368 case e1000_82542_rev2_1:
4369 case e1000_82543:
4370 case e1000_82544:
4371 /* No setup necessary */
4372 break;
4373 case e1000_82541:
4374 case e1000_82547:
4375 case e1000_82541_rev_2:
4376 case e1000_82547_rev_2:
4377 /* Turn off PHY Smart Power Down (if enabled) */
4378 ret_val = e1000_read_phy_reg(hw, IGP01E1000_GMII_FIFO,
4379 &hw->phy_spd_default);
4380 if (ret_val)
4381 return ret_val;
4382 ret_val = e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO,
4383 (u16) (hw->phy_spd_default &
4384 ~IGP01E1000_GMII_SPD));
4385 if (ret_val)
4386 return ret_val;
4387 /* Fall Through */
4388 default:
4389 if (hw->media_type == e1000_media_type_fiber) {
4390 ledctl = er32(LEDCTL);
4391 /* Save current LEDCTL settings */
4392 hw->ledctl_default = ledctl;
4393 /* Turn off LED0 */
4394 ledctl &= ~(E1000_LEDCTL_LED0_IVRT |
4395 E1000_LEDCTL_LED0_BLINK |
4396 E1000_LEDCTL_LED0_MODE_MASK);
4397 ledctl |= (E1000_LEDCTL_MODE_LED_OFF <<
4398 E1000_LEDCTL_LED0_MODE_SHIFT);
4399 ew32(LEDCTL, ledctl);
4400 } else if (hw->media_type == e1000_media_type_copper)
4401 ew32(LEDCTL, hw->ledctl_mode1);
4402 break;
4403 }
4404
4405 return E1000_SUCCESS;
4406 }
4407
4408 /**
4409 * e1000_cleanup_led - Restores the saved state of the SW controlable LED.
4410 * @hw: Struct containing variables accessed by shared code
4411 */
4412 s32 e1000_cleanup_led(struct e1000_hw *hw)
4413 {
4414 s32 ret_val = E1000_SUCCESS;
4415
4416 e_dbg("e1000_cleanup_led");
4417
4418 switch (hw->mac_type) {
4419 case e1000_82542_rev2_0:
4420 case e1000_82542_rev2_1:
4421 case e1000_82543:
4422 case e1000_82544:
4423 /* No cleanup necessary */
4424 break;
4425 case e1000_82541:
4426 case e1000_82547:
4427 case e1000_82541_rev_2:
4428 case e1000_82547_rev_2:
4429 /* Turn on PHY Smart Power Down (if previously enabled) */
4430 ret_val = e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO,
4431 hw->phy_spd_default);
4432 if (ret_val)
4433 return ret_val;
4434 /* Fall Through */
4435 default:
4436 /* Restore LEDCTL settings */
4437 ew32(LEDCTL, hw->ledctl_default);
4438 break;
4439 }
4440
4441 return E1000_SUCCESS;
4442 }
4443
4444 /**
4445 * e1000_led_on - Turns on the software controllable LED
4446 * @hw: Struct containing variables accessed by shared code
4447 */
4448 s32 e1000_led_on(struct e1000_hw *hw)
4449 {
4450 u32 ctrl = er32(CTRL);
4451
4452 e_dbg("e1000_led_on");
4453
4454 switch (hw->mac_type) {
4455 case e1000_82542_rev2_0:
4456 case e1000_82542_rev2_1:
4457 case e1000_82543:
4458 /* Set SW Defineable Pin 0 to turn on the LED */
4459 ctrl |= E1000_CTRL_SWDPIN0;
4460 ctrl |= E1000_CTRL_SWDPIO0;
4461 break;
4462 case e1000_82544:
4463 if (hw->media_type == e1000_media_type_fiber) {
4464 /* Set SW Defineable Pin 0 to turn on the LED */
4465 ctrl |= E1000_CTRL_SWDPIN0;
4466 ctrl |= E1000_CTRL_SWDPIO0;
4467 } else {
4468 /* Clear SW Defineable Pin 0 to turn on the LED */
4469 ctrl &= ~E1000_CTRL_SWDPIN0;
4470 ctrl |= E1000_CTRL_SWDPIO0;
4471 }
4472 break;
4473 default:
4474 if (hw->media_type == e1000_media_type_fiber) {
4475 /* Clear SW Defineable Pin 0 to turn on the LED */
4476 ctrl &= ~E1000_CTRL_SWDPIN0;
4477 ctrl |= E1000_CTRL_SWDPIO0;
4478 } else if (hw->media_type == e1000_media_type_copper) {
4479 ew32(LEDCTL, hw->ledctl_mode2);
4480 return E1000_SUCCESS;
4481 }
4482 break;
4483 }
4484
4485 ew32(CTRL, ctrl);
4486
4487 return E1000_SUCCESS;
4488 }
4489
4490 /**
4491 * e1000_led_off - Turns off the software controllable LED
4492 * @hw: Struct containing variables accessed by shared code
4493 */
4494 s32 e1000_led_off(struct e1000_hw *hw)
4495 {
4496 u32 ctrl = er32(CTRL);
4497
4498 e_dbg("e1000_led_off");
4499
4500 switch (hw->mac_type) {
4501 case e1000_82542_rev2_0:
4502 case e1000_82542_rev2_1:
4503 case e1000_82543:
4504 /* Clear SW Defineable Pin 0 to turn off the LED */
4505 ctrl &= ~E1000_CTRL_SWDPIN0;
4506 ctrl |= E1000_CTRL_SWDPIO0;
4507 break;
4508 case e1000_82544:
4509 if (hw->media_type == e1000_media_type_fiber) {
4510 /* Clear SW Defineable Pin 0 to turn off the LED */
4511 ctrl &= ~E1000_CTRL_SWDPIN0;
4512 ctrl |= E1000_CTRL_SWDPIO0;
4513 } else {
4514 /* Set SW Defineable Pin 0 to turn off the LED */
4515 ctrl |= E1000_CTRL_SWDPIN0;
4516 ctrl |= E1000_CTRL_SWDPIO0;
4517 }
4518 break;
4519 default:
4520 if (hw->media_type == e1000_media_type_fiber) {
4521 /* Set SW Defineable Pin 0 to turn off the LED */
4522 ctrl |= E1000_CTRL_SWDPIN0;
4523 ctrl |= E1000_CTRL_SWDPIO0;
4524 } else if (hw->media_type == e1000_media_type_copper) {
4525 ew32(LEDCTL, hw->ledctl_mode1);
4526 return E1000_SUCCESS;
4527 }
4528 break;
4529 }
4530
4531 ew32(CTRL, ctrl);
4532
4533 return E1000_SUCCESS;
4534 }
4535
4536 /**
4537 * e1000_clear_hw_cntrs - Clears all hardware statistics counters.
4538 * @hw: Struct containing variables accessed by shared code
4539 */
4540 static void e1000_clear_hw_cntrs(struct e1000_hw *hw)
4541 {
4542 volatile u32 temp;
4543
4544 temp = er32(CRCERRS);
4545 temp = er32(SYMERRS);
4546 temp = er32(MPC);
4547 temp = er32(SCC);
4548 temp = er32(ECOL);
4549 temp = er32(MCC);
4550 temp = er32(LATECOL);
4551 temp = er32(COLC);
4552 temp = er32(DC);
4553 temp = er32(SEC);
4554 temp = er32(RLEC);
4555 temp = er32(XONRXC);
4556 temp = er32(XONTXC);
4557 temp = er32(XOFFRXC);
4558 temp = er32(XOFFTXC);
4559 temp = er32(FCRUC);
4560
4561 temp = er32(PRC64);
4562 temp = er32(PRC127);
4563 temp = er32(PRC255);
4564 temp = er32(PRC511);
4565 temp = er32(PRC1023);
4566 temp = er32(PRC1522);
4567
4568 temp = er32(GPRC);
4569 temp = er32(BPRC);
4570 temp = er32(MPRC);
4571 temp = er32(GPTC);
4572 temp = er32(GORCL);
4573 temp = er32(GORCH);
4574 temp = er32(GOTCL);
4575 temp = er32(GOTCH);
4576 temp = er32(RNBC);
4577 temp = er32(RUC);
4578 temp = er32(RFC);
4579 temp = er32(ROC);
4580 temp = er32(RJC);
4581 temp = er32(TORL);
4582 temp = er32(TORH);
4583 temp = er32(TOTL);
4584 temp = er32(TOTH);
4585 temp = er32(TPR);
4586 temp = er32(TPT);
4587
4588 temp = er32(PTC64);
4589 temp = er32(PTC127);
4590 temp = er32(PTC255);
4591 temp = er32(PTC511);
4592 temp = er32(PTC1023);
4593 temp = er32(PTC1522);
4594
4595 temp = er32(MPTC);
4596 temp = er32(BPTC);
4597
4598 if (hw->mac_type < e1000_82543)
4599 return;
4600
4601 temp = er32(ALGNERRC);
4602 temp = er32(RXERRC);
4603 temp = er32(TNCRS);
4604 temp = er32(CEXTERR);
4605 temp = er32(TSCTC);
4606 temp = er32(TSCTFC);
4607
4608 if (hw->mac_type <= e1000_82544)
4609 return;
4610
4611 temp = er32(MGTPRC);
4612 temp = er32(MGTPDC);
4613 temp = er32(MGTPTC);
4614 }
4615
4616 /**
4617 * e1000_reset_adaptive - Resets Adaptive IFS to its default state.
4618 * @hw: Struct containing variables accessed by shared code
4619 *
4620 * Call this after e1000_init_hw. You may override the IFS defaults by setting
4621 * hw->ifs_params_forced to true. However, you must initialize hw->
4622 * current_ifs_val, ifs_min_val, ifs_max_val, ifs_step_size, and ifs_ratio
4623 * before calling this function.
4624 */
4625 void e1000_reset_adaptive(struct e1000_hw *hw)
4626 {
4627 e_dbg("e1000_reset_adaptive");
4628
4629 if (hw->adaptive_ifs) {
4630 if (!hw->ifs_params_forced) {
4631 hw->current_ifs_val = 0;
4632 hw->ifs_min_val = IFS_MIN;
4633 hw->ifs_max_val = IFS_MAX;
4634 hw->ifs_step_size = IFS_STEP;
4635 hw->ifs_ratio = IFS_RATIO;
4636 }
4637 hw->in_ifs_mode = false;
4638 ew32(AIT, 0);
4639 } else {
4640 e_dbg("Not in Adaptive IFS mode!\n");
4641 }
4642 }
4643
4644 /**
4645 * e1000_update_adaptive - update adaptive IFS
4646 * @hw: Struct containing variables accessed by shared code
4647 * @tx_packets: Number of transmits since last callback
4648 * @total_collisions: Number of collisions since last callback
4649 *
4650 * Called during the callback/watchdog routine to update IFS value based on
4651 * the ratio of transmits to collisions.
4652 */
4653 void e1000_update_adaptive(struct e1000_hw *hw)
4654 {
4655 e_dbg("e1000_update_adaptive");
4656
4657 if (hw->adaptive_ifs) {
4658 if ((hw->collision_delta *hw->ifs_ratio) > hw->tx_packet_delta) {
4659 if (hw->tx_packet_delta > MIN_NUM_XMITS) {
4660 hw->in_ifs_mode = true;
4661 if (hw->current_ifs_val < hw->ifs_max_val) {
4662 if (hw->current_ifs_val == 0)
4663 hw->current_ifs_val =
4664 hw->ifs_min_val;
4665 else
4666 hw->current_ifs_val +=
4667 hw->ifs_step_size;
4668 ew32(AIT, hw->current_ifs_val);
4669 }
4670 }
4671 } else {
4672 if (hw->in_ifs_mode
4673 && (hw->tx_packet_delta <= MIN_NUM_XMITS)) {
4674 hw->current_ifs_val = 0;
4675 hw->in_ifs_mode = false;
4676 ew32(AIT, 0);
4677 }
4678 }
4679 } else {
4680 e_dbg("Not in Adaptive IFS mode!\n");
4681 }
4682 }
4683
4684 /**
4685 * e1000_tbi_adjust_stats
4686 * @hw: Struct containing variables accessed by shared code
4687 * @frame_len: The length of the frame in question
4688 * @mac_addr: The Ethernet destination address of the frame in question
4689 *
4690 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
4691 */
4692 void e1000_tbi_adjust_stats(struct e1000_hw *hw, struct e1000_hw_stats *stats,
4693 u32 frame_len, u8 *mac_addr)
4694 {
4695 u64 carry_bit;
4696
4697 /* First adjust the frame length. */
4698 frame_len--;
4699 /* We need to adjust the statistics counters, since the hardware
4700 * counters overcount this packet as a CRC error and undercount
4701 * the packet as a good packet
4702 */
4703 /* This packet should not be counted as a CRC error. */
4704 stats->crcerrs--;
4705 /* This packet does count as a Good Packet Received. */
4706 stats->gprc++;
4707
4708 /* Adjust the Good Octets received counters */
4709 carry_bit = 0x80000000 & stats->gorcl;
4710 stats->gorcl += frame_len;
4711 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4712 * Received Count) was one before the addition,
4713 * AND it is zero after, then we lost the carry out,
4714 * need to add one to Gorch (Good Octets Received Count High).
4715 * This could be simplified if all environments supported
4716 * 64-bit integers.
4717 */
4718 if (carry_bit && ((stats->gorcl & 0x80000000) == 0))
4719 stats->gorch++;
4720 /* Is this a broadcast or multicast? Check broadcast first,
4721 * since the test for a multicast frame will test positive on
4722 * a broadcast frame.
4723 */
4724 if ((mac_addr[0] == (u8) 0xff) && (mac_addr[1] == (u8) 0xff))
4725 /* Broadcast packet */
4726 stats->bprc++;
4727 else if (*mac_addr & 0x01)
4728 /* Multicast packet */
4729 stats->mprc++;
4730
4731 if (frame_len == hw->max_frame_size) {
4732 /* In this case, the hardware has overcounted the number of
4733 * oversize frames.
4734 */
4735 if (stats->roc > 0)
4736 stats->roc--;
4737 }
4738
4739 /* Adjust the bin counters when the extra byte put the frame in the
4740 * wrong bin. Remember that the frame_len was adjusted above.
4741 */
4742 if (frame_len == 64) {
4743 stats->prc64++;
4744 stats->prc127--;
4745 } else if (frame_len == 127) {
4746 stats->prc127++;
4747 stats->prc255--;
4748 } else if (frame_len == 255) {
4749 stats->prc255++;
4750 stats->prc511--;
4751 } else if (frame_len == 511) {
4752 stats->prc511++;
4753 stats->prc1023--;
4754 } else if (frame_len == 1023) {
4755 stats->prc1023++;
4756 stats->prc1522--;
4757 } else if (frame_len == 1522) {
4758 stats->prc1522++;
4759 }
4760 }
4761
4762 /**
4763 * e1000_get_bus_info
4764 * @hw: Struct containing variables accessed by shared code
4765 *
4766 * Gets the current PCI bus type, speed, and width of the hardware
4767 */
4768 void e1000_get_bus_info(struct e1000_hw *hw)
4769 {
4770 u32 status;
4771
4772 switch (hw->mac_type) {
4773 case e1000_82542_rev2_0:
4774 case e1000_82542_rev2_1:
4775 hw->bus_type = e1000_bus_type_pci;
4776 hw->bus_speed = e1000_bus_speed_unknown;
4777 hw->bus_width = e1000_bus_width_unknown;
4778 break;
4779 default:
4780 status = er32(STATUS);
4781 hw->bus_type = (status & E1000_STATUS_PCIX_MODE) ?
4782 e1000_bus_type_pcix : e1000_bus_type_pci;
4783
4784 if (hw->device_id == E1000_DEV_ID_82546EB_QUAD_COPPER) {
4785 hw->bus_speed = (hw->bus_type == e1000_bus_type_pci) ?
4786 e1000_bus_speed_66 : e1000_bus_speed_120;
4787 } else if (hw->bus_type == e1000_bus_type_pci) {
4788 hw->bus_speed = (status & E1000_STATUS_PCI66) ?
4789 e1000_bus_speed_66 : e1000_bus_speed_33;
4790 } else {
4791 switch (status & E1000_STATUS_PCIX_SPEED) {
4792 case E1000_STATUS_PCIX_SPEED_66:
4793 hw->bus_speed = e1000_bus_speed_66;
4794 break;
4795 case E1000_STATUS_PCIX_SPEED_100:
4796 hw->bus_speed = e1000_bus_speed_100;
4797 break;
4798 case E1000_STATUS_PCIX_SPEED_133:
4799 hw->bus_speed = e1000_bus_speed_133;
4800 break;
4801 default:
4802 hw->bus_speed = e1000_bus_speed_reserved;
4803 break;
4804 }
4805 }
4806 hw->bus_width = (status & E1000_STATUS_BUS64) ?
4807 e1000_bus_width_64 : e1000_bus_width_32;
4808 break;
4809 }
4810 }
4811
4812 /**
4813 * e1000_write_reg_io
4814 * @hw: Struct containing variables accessed by shared code
4815 * @offset: offset to write to
4816 * @value: value to write
4817 *
4818 * Writes a value to one of the devices registers using port I/O (as opposed to
4819 * memory mapped I/O). Only 82544 and newer devices support port I/O.
4820 */
4821 static void e1000_write_reg_io(struct e1000_hw *hw, u32 offset, u32 value)
4822 {
4823 unsigned long io_addr = hw->io_base;
4824 unsigned long io_data = hw->io_base + 4;
4825
4826 e1000_io_write(hw, io_addr, offset);
4827 e1000_io_write(hw, io_data, value);
4828 }
4829
4830 /**
4831 * e1000_get_cable_length - Estimates the cable length.
4832 * @hw: Struct containing variables accessed by shared code
4833 * @min_length: The estimated minimum length
4834 * @max_length: The estimated maximum length
4835 *
4836 * returns: - E1000_ERR_XXX
4837 * E1000_SUCCESS
4838 *
4839 * This function always returns a ranged length (minimum & maximum).
4840 * So for M88 phy's, this function interprets the one value returned from the
4841 * register to the minimum and maximum range.
4842 * For IGP phy's, the function calculates the range by the AGC registers.
4843 */
4844 static s32 e1000_get_cable_length(struct e1000_hw *hw, u16 *min_length,
4845 u16 *max_length)
4846 {
4847 s32 ret_val;
4848 u16 agc_value = 0;
4849 u16 i, phy_data;
4850 u16 cable_length;
4851
4852 e_dbg("e1000_get_cable_length");
4853
4854 *min_length = *max_length = 0;
4855
4856 /* Use old method for Phy older than IGP */
4857 if (hw->phy_type == e1000_phy_m88) {
4858
4859 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS,
4860 &phy_data);
4861 if (ret_val)
4862 return ret_val;
4863 cable_length = (phy_data & M88E1000_PSSR_CABLE_LENGTH) >>
4864 M88E1000_PSSR_CABLE_LENGTH_SHIFT;
4865
4866 /* Convert the enum value to ranged values */
4867 switch (cable_length) {
4868 case e1000_cable_length_50:
4869 *min_length = 0;
4870 *max_length = e1000_igp_cable_length_50;
4871 break;
4872 case e1000_cable_length_50_80:
4873 *min_length = e1000_igp_cable_length_50;
4874 *max_length = e1000_igp_cable_length_80;
4875 break;
4876 case e1000_cable_length_80_110:
4877 *min_length = e1000_igp_cable_length_80;
4878 *max_length = e1000_igp_cable_length_110;
4879 break;
4880 case e1000_cable_length_110_140:
4881 *min_length = e1000_igp_cable_length_110;
4882 *max_length = e1000_igp_cable_length_140;
4883 break;
4884 case e1000_cable_length_140:
4885 *min_length = e1000_igp_cable_length_140;
4886 *max_length = e1000_igp_cable_length_170;
4887 break;
4888 default:
4889 return -E1000_ERR_PHY;
4890 break;
4891 }
4892 } else if (hw->phy_type == e1000_phy_igp) { /* For IGP PHY */
4893 u16 cur_agc_value;
4894 u16 min_agc_value = IGP01E1000_AGC_LENGTH_TABLE_SIZE;
4895 u16 agc_reg_array[IGP01E1000_PHY_CHANNEL_NUM] =
4896 { IGP01E1000_PHY_AGC_A,
4897 IGP01E1000_PHY_AGC_B,
4898 IGP01E1000_PHY_AGC_C,
4899 IGP01E1000_PHY_AGC_D
4900 };
4901 /* Read the AGC registers for all channels */
4902 for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) {
4903
4904 ret_val =
4905 e1000_read_phy_reg(hw, agc_reg_array[i], &phy_data);
4906 if (ret_val)
4907 return ret_val;
4908
4909 cur_agc_value = phy_data >> IGP01E1000_AGC_LENGTH_SHIFT;
4910
4911 /* Value bound check. */
4912 if ((cur_agc_value >=
4913 IGP01E1000_AGC_LENGTH_TABLE_SIZE - 1)
4914 || (cur_agc_value == 0))
4915 return -E1000_ERR_PHY;
4916
4917 agc_value += cur_agc_value;
4918
4919 /* Update minimal AGC value. */
4920 if (min_agc_value > cur_agc_value)
4921 min_agc_value = cur_agc_value;
4922 }
4923
4924 /* Remove the minimal AGC result for length < 50m */
4925 if (agc_value <
4926 IGP01E1000_PHY_CHANNEL_NUM * e1000_igp_cable_length_50) {
4927 agc_value -= min_agc_value;
4928
4929 /* Get the average length of the remaining 3 channels */
4930 agc_value /= (IGP01E1000_PHY_CHANNEL_NUM - 1);
4931 } else {
4932 /* Get the average length of all the 4 channels. */
4933 agc_value /= IGP01E1000_PHY_CHANNEL_NUM;
4934 }
4935
4936 /* Set the range of the calculated length. */
4937 *min_length = ((e1000_igp_cable_length_table[agc_value] -
4938 IGP01E1000_AGC_RANGE) > 0) ?
4939 (e1000_igp_cable_length_table[agc_value] -
4940 IGP01E1000_AGC_RANGE) : 0;
4941 *max_length = e1000_igp_cable_length_table[agc_value] +
4942 IGP01E1000_AGC_RANGE;
4943 }
4944
4945 return E1000_SUCCESS;
4946 }
4947
4948 /**
4949 * e1000_check_polarity - Check the cable polarity
4950 * @hw: Struct containing variables accessed by shared code
4951 * @polarity: output parameter : 0 - Polarity is not reversed
4952 * 1 - Polarity is reversed.
4953 *
4954 * returns: - E1000_ERR_XXX
4955 * E1000_SUCCESS
4956 *
4957 * For phy's older than IGP, this function simply reads the polarity bit in the
4958 * Phy Status register. For IGP phy's, this bit is valid only if link speed is
4959 * 10 Mbps. If the link speed is 100 Mbps there is no polarity so this bit will
4960 * return 0. If the link speed is 1000 Mbps the polarity status is in the
4961 * IGP01E1000_PHY_PCS_INIT_REG.
4962 */
4963 static s32 e1000_check_polarity(struct e1000_hw *hw,
4964 e1000_rev_polarity *polarity)
4965 {
4966 s32 ret_val;
4967 u16 phy_data;
4968
4969 e_dbg("e1000_check_polarity");
4970
4971 if (hw->phy_type == e1000_phy_m88) {
4972 /* return the Polarity bit in the Status register. */
4973 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS,
4974 &phy_data);
4975 if (ret_val)
4976 return ret_val;
4977 *polarity = ((phy_data & M88E1000_PSSR_REV_POLARITY) >>
4978 M88E1000_PSSR_REV_POLARITY_SHIFT) ?
4979 e1000_rev_polarity_reversed : e1000_rev_polarity_normal;
4980
4981 } else if (hw->phy_type == e1000_phy_igp) {
4982 /* Read the Status register to check the speed */
4983 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_STATUS,
4984 &phy_data);
4985 if (ret_val)
4986 return ret_val;
4987
4988 /* If speed is 1000 Mbps, must read the IGP01E1000_PHY_PCS_INIT_REG to
4989 * find the polarity status */
4990 if ((phy_data & IGP01E1000_PSSR_SPEED_MASK) ==
4991 IGP01E1000_PSSR_SPEED_1000MBPS) {
4992
4993 /* Read the GIG initialization PCS register (0x00B4) */
4994 ret_val =
4995 e1000_read_phy_reg(hw, IGP01E1000_PHY_PCS_INIT_REG,
4996 &phy_data);
4997 if (ret_val)
4998 return ret_val;
4999
5000 /* Check the polarity bits */
5001 *polarity = (phy_data & IGP01E1000_PHY_POLARITY_MASK) ?
5002 e1000_rev_polarity_reversed :
5003 e1000_rev_polarity_normal;
5004 } else {
5005 /* For 10 Mbps, read the polarity bit in the status register. (for
5006 * 100 Mbps this bit is always 0) */
5007 *polarity =
5008 (phy_data & IGP01E1000_PSSR_POLARITY_REVERSED) ?
5009 e1000_rev_polarity_reversed :
5010 e1000_rev_polarity_normal;
5011 }
5012 }
5013 return E1000_SUCCESS;
5014 }
5015
5016 /**
5017 * e1000_check_downshift - Check if Downshift occurred
5018 * @hw: Struct containing variables accessed by shared code
5019 * @downshift: output parameter : 0 - No Downshift occurred.
5020 * 1 - Downshift occurred.
5021 *
5022 * returns: - E1000_ERR_XXX
5023 * E1000_SUCCESS
5024 *
5025 * For phy's older than IGP, this function reads the Downshift bit in the Phy
5026 * Specific Status register. For IGP phy's, it reads the Downgrade bit in the
5027 * Link Health register. In IGP this bit is latched high, so the driver must
5028 * read it immediately after link is established.
5029 */
5030 static s32 e1000_check_downshift(struct e1000_hw *hw)
5031 {
5032 s32 ret_val;
5033 u16 phy_data;
5034
5035 e_dbg("e1000_check_downshift");
5036
5037 if (hw->phy_type == e1000_phy_igp) {
5038 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_LINK_HEALTH,
5039 &phy_data);
5040 if (ret_val)
5041 return ret_val;
5042
5043 hw->speed_downgraded =
5044 (phy_data & IGP01E1000_PLHR_SS_DOWNGRADE) ? 1 : 0;
5045 } else if (hw->phy_type == e1000_phy_m88) {
5046 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS,
5047 &phy_data);
5048 if (ret_val)
5049 return ret_val;
5050
5051 hw->speed_downgraded = (phy_data & M88E1000_PSSR_DOWNSHIFT) >>
5052 M88E1000_PSSR_DOWNSHIFT_SHIFT;
5053 }
5054
5055 return E1000_SUCCESS;
5056 }
5057
5058 /**
5059 * e1000_config_dsp_after_link_change
5060 * @hw: Struct containing variables accessed by shared code
5061 * @link_up: was link up at the time this was called
5062 *
5063 * returns: - E1000_ERR_PHY if fail to read/write the PHY
5064 * E1000_SUCCESS at any other case.
5065 *
5066 * 82541_rev_2 & 82547_rev_2 have the capability to configure the DSP when a
5067 * gigabit link is achieved to improve link quality.
5068 */
5069
5070 static s32 e1000_config_dsp_after_link_change(struct e1000_hw *hw, bool link_up)
5071 {
5072 s32 ret_val;
5073 u16 phy_data, phy_saved_data, speed, duplex, i;
5074 u16 dsp_reg_array[IGP01E1000_PHY_CHANNEL_NUM] =
5075 { IGP01E1000_PHY_AGC_PARAM_A,
5076 IGP01E1000_PHY_AGC_PARAM_B,
5077 IGP01E1000_PHY_AGC_PARAM_C,
5078 IGP01E1000_PHY_AGC_PARAM_D
5079 };
5080 u16 min_length, max_length;
5081
5082 e_dbg("e1000_config_dsp_after_link_change");
5083
5084 if (hw->phy_type != e1000_phy_igp)
5085 return E1000_SUCCESS;
5086
5087 if (link_up) {
5088 ret_val = e1000_get_speed_and_duplex(hw, &speed, &duplex);
5089 if (ret_val) {
5090 e_dbg("Error getting link speed and duplex\n");
5091 return ret_val;
5092 }
5093
5094 if (speed == SPEED_1000) {
5095
5096 ret_val =
5097 e1000_get_cable_length(hw, &min_length,
5098 &max_length);
5099 if (ret_val)
5100 return ret_val;
5101
5102 if ((hw->dsp_config_state == e1000_dsp_config_enabled)
5103 && min_length >= e1000_igp_cable_length_50) {
5104
5105 for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) {
5106 ret_val =
5107 e1000_read_phy_reg(hw,
5108 dsp_reg_array[i],
5109 &phy_data);
5110 if (ret_val)
5111 return ret_val;
5112
5113 phy_data &=
5114 ~IGP01E1000_PHY_EDAC_MU_INDEX;
5115
5116 ret_val =
5117 e1000_write_phy_reg(hw,
5118 dsp_reg_array
5119 [i], phy_data);
5120 if (ret_val)
5121 return ret_val;
5122 }
5123 hw->dsp_config_state =
5124 e1000_dsp_config_activated;
5125 }
5126
5127 if ((hw->ffe_config_state == e1000_ffe_config_enabled)
5128 && (min_length < e1000_igp_cable_length_50)) {
5129
5130 u16 ffe_idle_err_timeout =
5131 FFE_IDLE_ERR_COUNT_TIMEOUT_20;
5132 u32 idle_errs = 0;
5133
5134 /* clear previous idle error counts */
5135 ret_val =
5136 e1000_read_phy_reg(hw, PHY_1000T_STATUS,
5137 &phy_data);
5138 if (ret_val)
5139 return ret_val;
5140
5141 for (i = 0; i < ffe_idle_err_timeout; i++) {
5142 udelay(1000);
5143 ret_val =
5144 e1000_read_phy_reg(hw,
5145 PHY_1000T_STATUS,
5146 &phy_data);
5147 if (ret_val)
5148 return ret_val;
5149
5150 idle_errs +=
5151 (phy_data &
5152 SR_1000T_IDLE_ERROR_CNT);
5153 if (idle_errs >
5154 SR_1000T_PHY_EXCESSIVE_IDLE_ERR_COUNT)
5155 {
5156 hw->ffe_config_state =
5157 e1000_ffe_config_active;
5158
5159 ret_val =
5160 e1000_write_phy_reg(hw,
5161 IGP01E1000_PHY_DSP_FFE,
5162 IGP01E1000_PHY_DSP_FFE_CM_CP);
5163 if (ret_val)
5164 return ret_val;
5165 break;
5166 }
5167
5168 if (idle_errs)
5169 ffe_idle_err_timeout =
5170 FFE_IDLE_ERR_COUNT_TIMEOUT_100;
5171 }
5172 }
5173 }
5174 } else {
5175 if (hw->dsp_config_state == e1000_dsp_config_activated) {
5176 /* Save off the current value of register 0x2F5B to be restored at
5177 * the end of the routines. */
5178 ret_val =
5179 e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data);
5180
5181 if (ret_val)
5182 return ret_val;
5183
5184 /* Disable the PHY transmitter */
5185 ret_val = e1000_write_phy_reg(hw, 0x2F5B, 0x0003);
5186
5187 if (ret_val)
5188 return ret_val;
5189
5190 mdelay(20);
5191
5192 ret_val = e1000_write_phy_reg(hw, 0x0000,
5193 IGP01E1000_IEEE_FORCE_GIGA);
5194 if (ret_val)
5195 return ret_val;
5196 for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) {
5197 ret_val =
5198 e1000_read_phy_reg(hw, dsp_reg_array[i],
5199 &phy_data);
5200 if (ret_val)
5201 return ret_val;
5202
5203 phy_data &= ~IGP01E1000_PHY_EDAC_MU_INDEX;
5204 phy_data |= IGP01E1000_PHY_EDAC_SIGN_EXT_9_BITS;
5205
5206 ret_val =
5207 e1000_write_phy_reg(hw, dsp_reg_array[i],
5208 phy_data);
5209 if (ret_val)
5210 return ret_val;
5211 }
5212
5213 ret_val = e1000_write_phy_reg(hw, 0x0000,
5214 IGP01E1000_IEEE_RESTART_AUTONEG);
5215 if (ret_val)
5216 return ret_val;
5217
5218 mdelay(20);
5219
5220 /* Now enable the transmitter */
5221 ret_val =
5222 e1000_write_phy_reg(hw, 0x2F5B, phy_saved_data);
5223
5224 if (ret_val)
5225 return ret_val;
5226
5227 hw->dsp_config_state = e1000_dsp_config_enabled;
5228 }
5229
5230 if (hw->ffe_config_state == e1000_ffe_config_active) {
5231 /* Save off the current value of register 0x2F5B to be restored at
5232 * the end of the routines. */
5233 ret_val =
5234 e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data);
5235
5236 if (ret_val)
5237 return ret_val;
5238
5239 /* Disable the PHY transmitter */
5240 ret_val = e1000_write_phy_reg(hw, 0x2F5B, 0x0003);
5241
5242 if (ret_val)
5243 return ret_val;
5244
5245 mdelay(20);
5246
5247 ret_val = e1000_write_phy_reg(hw, 0x0000,
5248 IGP01E1000_IEEE_FORCE_GIGA);
5249 if (ret_val)
5250 return ret_val;
5251 ret_val =
5252 e1000_write_phy_reg(hw, IGP01E1000_PHY_DSP_FFE,
5253 IGP01E1000_PHY_DSP_FFE_DEFAULT);
5254 if (ret_val)
5255 return ret_val;
5256
5257 ret_val = e1000_write_phy_reg(hw, 0x0000,
5258 IGP01E1000_IEEE_RESTART_AUTONEG);
5259 if (ret_val)
5260 return ret_val;
5261
5262 mdelay(20);
5263
5264 /* Now enable the transmitter */
5265 ret_val =
5266 e1000_write_phy_reg(hw, 0x2F5B, phy_saved_data);
5267
5268 if (ret_val)
5269 return ret_val;
5270
5271 hw->ffe_config_state = e1000_ffe_config_enabled;
5272 }
5273 }
5274 return E1000_SUCCESS;
5275 }
5276
5277 /**
5278 * e1000_set_phy_mode - Set PHY to class A mode
5279 * @hw: Struct containing variables accessed by shared code
5280 *
5281 * Assumes the following operations will follow to enable the new class mode.
5282 * 1. Do a PHY soft reset
5283 * 2. Restart auto-negotiation or force link.
5284 */
5285 static s32 e1000_set_phy_mode(struct e1000_hw *hw)
5286 {
5287 s32 ret_val;
5288 u16 eeprom_data;
5289
5290 e_dbg("e1000_set_phy_mode");
5291
5292 if ((hw->mac_type == e1000_82545_rev_3) &&
5293 (hw->media_type == e1000_media_type_copper)) {
5294 ret_val =
5295 e1000_read_eeprom(hw, EEPROM_PHY_CLASS_WORD, 1,
5296 &eeprom_data);
5297 if (ret_val) {
5298 return ret_val;
5299 }
5300
5301 if ((eeprom_data != EEPROM_RESERVED_WORD) &&
5302 (eeprom_data & EEPROM_PHY_CLASS_A)) {
5303 ret_val =
5304 e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT,
5305 0x000B);
5306 if (ret_val)
5307 return ret_val;
5308 ret_val =
5309 e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL,
5310 0x8104);
5311 if (ret_val)
5312 return ret_val;
5313
5314 hw->phy_reset_disable = false;
5315 }
5316 }
5317
5318 return E1000_SUCCESS;
5319 }
5320
5321 /**
5322 * e1000_set_d3_lplu_state - set d3 link power state
5323 * @hw: Struct containing variables accessed by shared code
5324 * @active: true to enable lplu false to disable lplu.
5325 *
5326 * This function sets the lplu state according to the active flag. When
5327 * activating lplu this function also disables smart speed and vise versa.
5328 * lplu will not be activated unless the device autonegotiation advertisement
5329 * meets standards of either 10 or 10/100 or 10/100/1000 at all duplexes.
5330 *
5331 * returns: - E1000_ERR_PHY if fail to read/write the PHY
5332 * E1000_SUCCESS at any other case.
5333 */
5334 static s32 e1000_set_d3_lplu_state(struct e1000_hw *hw, bool active)
5335 {
5336 s32 ret_val;
5337 u16 phy_data;
5338 e_dbg("e1000_set_d3_lplu_state");
5339
5340 if (hw->phy_type != e1000_phy_igp)
5341 return E1000_SUCCESS;
5342
5343 /* During driver activity LPLU should not be used or it will attain link
5344 * from the lowest speeds starting from 10Mbps. The capability is used for
5345 * Dx transitions and states */
5346 if (hw->mac_type == e1000_82541_rev_2
5347 || hw->mac_type == e1000_82547_rev_2) {
5348 ret_val =
5349 e1000_read_phy_reg(hw, IGP01E1000_GMII_FIFO, &phy_data);
5350 if (ret_val)
5351 return ret_val;
5352 }
5353
5354 if (!active) {
5355 if (hw->mac_type == e1000_82541_rev_2 ||
5356 hw->mac_type == e1000_82547_rev_2) {
5357 phy_data &= ~IGP01E1000_GMII_FLEX_SPD;
5358 ret_val =
5359 e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO,
5360 phy_data);
5361 if (ret_val)
5362 return ret_val;
5363 }
5364
5365 /* LPLU and SmartSpeed are mutually exclusive. LPLU is used during
5366 * Dx states where the power conservation is most important. During
5367 * driver activity we should enable SmartSpeed, so performance is
5368 * maintained. */
5369 if (hw->smart_speed == e1000_smart_speed_on) {
5370 ret_val =
5371 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
5372 &phy_data);
5373 if (ret_val)
5374 return ret_val;
5375
5376 phy_data |= IGP01E1000_PSCFR_SMART_SPEED;
5377 ret_val =
5378 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
5379 phy_data);
5380 if (ret_val)
5381 return ret_val;
5382 } else if (hw->smart_speed == e1000_smart_speed_off) {
5383 ret_val =
5384 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
5385 &phy_data);
5386 if (ret_val)
5387 return ret_val;
5388
5389 phy_data &= ~IGP01E1000_PSCFR_SMART_SPEED;
5390 ret_val =
5391 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
5392 phy_data);
5393 if (ret_val)
5394 return ret_val;
5395 }
5396 } else if ((hw->autoneg_advertised == AUTONEG_ADVERTISE_SPEED_DEFAULT)
5397 || (hw->autoneg_advertised == AUTONEG_ADVERTISE_10_ALL)
5398 || (hw->autoneg_advertised ==
5399 AUTONEG_ADVERTISE_10_100_ALL)) {
5400
5401 if (hw->mac_type == e1000_82541_rev_2 ||
5402 hw->mac_type == e1000_82547_rev_2) {
5403 phy_data |= IGP01E1000_GMII_FLEX_SPD;
5404 ret_val =
5405 e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO,
5406 phy_data);
5407 if (ret_val)
5408 return ret_val;
5409 }
5410
5411 /* When LPLU is enabled we should disable SmartSpeed */
5412 ret_val =
5413 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
5414 &phy_data);
5415 if (ret_val)
5416 return ret_val;
5417
5418 phy_data &= ~IGP01E1000_PSCFR_SMART_SPEED;
5419 ret_val =
5420 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
5421 phy_data);
5422 if (ret_val)
5423 return ret_val;
5424
5425 }
5426 return E1000_SUCCESS;
5427 }
5428
5429 /**
5430 * e1000_set_vco_speed
5431 * @hw: Struct containing variables accessed by shared code
5432 *
5433 * Change VCO speed register to improve Bit Error Rate performance of SERDES.
5434 */
5435 static s32 e1000_set_vco_speed(struct e1000_hw *hw)
5436 {
5437 s32 ret_val;
5438 u16 default_page = 0;
5439 u16 phy_data;
5440
5441 e_dbg("e1000_set_vco_speed");
5442
5443 switch (hw->mac_type) {
5444 case e1000_82545_rev_3:
5445 case e1000_82546_rev_3:
5446 break;
5447 default:
5448 return E1000_SUCCESS;
5449 }
5450
5451 /* Set PHY register 30, page 5, bit 8 to 0 */
5452
5453 ret_val =
5454 e1000_read_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, &default_page);
5455 if (ret_val)
5456 return ret_val;
5457
5458 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0005);
5459 if (ret_val)
5460 return ret_val;
5461
5462 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, &phy_data);
5463 if (ret_val)
5464 return ret_val;
5465
5466 phy_data &= ~M88E1000_PHY_VCO_REG_BIT8;
5467 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, phy_data);
5468 if (ret_val)
5469 return ret_val;
5470
5471 /* Set PHY register 30, page 4, bit 11 to 1 */
5472
5473 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0004);
5474 if (ret_val)
5475 return ret_val;
5476
5477 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, &phy_data);
5478 if (ret_val)
5479 return ret_val;
5480
5481 phy_data |= M88E1000_PHY_VCO_REG_BIT11;
5482 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, phy_data);
5483 if (ret_val)
5484 return ret_val;
5485
5486 ret_val =
5487 e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, default_page);
5488 if (ret_val)
5489 return ret_val;
5490
5491 return E1000_SUCCESS;
5492 }
5493
5494
5495 /**
5496 * e1000_enable_mng_pass_thru - check for bmc pass through
5497 * @hw: Struct containing variables accessed by shared code
5498 *
5499 * Verifies the hardware needs to allow ARPs to be processed by the host
5500 * returns: - true/false
5501 */
5502 u32 e1000_enable_mng_pass_thru(struct e1000_hw *hw)
5503 {
5504 u32 manc;
5505
5506 if (hw->asf_firmware_present) {
5507 manc = er32(MANC);
5508
5509 if (!(manc & E1000_MANC_RCV_TCO_EN) ||
5510 !(manc & E1000_MANC_EN_MAC_ADDR_FILTER))
5511 return false;
5512 if ((manc & E1000_MANC_SMBUS_EN) && !(manc & E1000_MANC_ASF_EN))
5513 return true;
5514 }
5515 return false;
5516 }
5517
5518 static s32 e1000_polarity_reversal_workaround(struct e1000_hw *hw)
5519 {
5520 s32 ret_val;
5521 u16 mii_status_reg;
5522 u16 i;
5523
5524 /* Polarity reversal workaround for forced 10F/10H links. */
5525
5526 /* Disable the transmitter on the PHY */
5527
5528 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0019);
5529 if (ret_val)
5530 return ret_val;
5531 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFFFF);
5532 if (ret_val)
5533 return ret_val;
5534
5535 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0000);
5536 if (ret_val)
5537 return ret_val;
5538
5539 /* This loop will early-out if the NO link condition has been met. */
5540 for (i = PHY_FORCE_TIME; i > 0; i--) {
5541 /* Read the MII Status Register and wait for Link Status bit
5542 * to be clear.
5543 */
5544
5545 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
5546 if (ret_val)
5547 return ret_val;
5548
5549 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
5550 if (ret_val)
5551 return ret_val;
5552
5553 if ((mii_status_reg & ~MII_SR_LINK_STATUS) == 0)
5554 break;
5555 mdelay(100);
5556 }
5557
5558 /* Recommended delay time after link has been lost */
5559 mdelay(1000);
5560
5561 /* Now we will re-enable th transmitter on the PHY */
5562
5563 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0019);
5564 if (ret_val)
5565 return ret_val;
5566 mdelay(50);
5567 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFFF0);
5568 if (ret_val)
5569 return ret_val;
5570 mdelay(50);
5571 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFF00);
5572 if (ret_val)
5573 return ret_val;
5574 mdelay(50);
5575 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0x0000);
5576 if (ret_val)
5577 return ret_val;
5578
5579 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0000);
5580 if (ret_val)
5581 return ret_val;
5582
5583 /* This loop will early-out if the link condition has been met. */
5584 for (i = PHY_FORCE_TIME; i > 0; i--) {
5585 /* Read the MII Status Register and wait for Link Status bit
5586 * to be set.
5587 */
5588
5589 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
5590 if (ret_val)
5591 return ret_val;
5592
5593 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg);
5594 if (ret_val)
5595 return ret_val;
5596
5597 if (mii_status_reg & MII_SR_LINK_STATUS)
5598 break;
5599 mdelay(100);
5600 }
5601 return E1000_SUCCESS;
5602 }
5603
5604 /**
5605 * e1000_get_auto_rd_done
5606 * @hw: Struct containing variables accessed by shared code
5607 *
5608 * Check for EEPROM Auto Read bit done.
5609 * returns: - E1000_ERR_RESET if fail to reset MAC
5610 * E1000_SUCCESS at any other case.
5611 */
5612 static s32 e1000_get_auto_rd_done(struct e1000_hw *hw)
5613 {
5614 e_dbg("e1000_get_auto_rd_done");
5615 msleep(5);
5616 return E1000_SUCCESS;
5617 }
5618
5619 /**
5620 * e1000_get_phy_cfg_done
5621 * @hw: Struct containing variables accessed by shared code
5622 *
5623 * Checks if the PHY configuration is done
5624 * returns: - E1000_ERR_RESET if fail to reset MAC
5625 * E1000_SUCCESS at any other case.
5626 */
5627 static s32 e1000_get_phy_cfg_done(struct e1000_hw *hw)
5628 {
5629 e_dbg("e1000_get_phy_cfg_done");
5630 mdelay(10);
5631 return E1000_SUCCESS;
5632 }
Linux kernel - Deliverables
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