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usb/net/r8152: fix integer overflow in expression
[deliverable/linux.git] / drivers / net / usb / r8152.c
1 /*
2 * Copyright (c) 2013 Realtek Semiconductor Corp. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * version 2 as published by the Free Software Foundation.
7 *
8 */
9
10 #include <linux/init.h>
11 #include <linux/signal.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/netdevice.h>
15 #include <linux/etherdevice.h>
16 #include <linux/mii.h>
17 #include <linux/ethtool.h>
18 #include <linux/usb.h>
19 #include <linux/crc32.h>
20 #include <linux/if_vlan.h>
21 #include <linux/uaccess.h>
22
23 /* Version Information */
24 #define DRIVER_VERSION "v1.0.0 (2013/05/03)"
25 #define DRIVER_AUTHOR "Realtek linux nic maintainers <nic_swsd@realtek.com>"
26 #define DRIVER_DESC "Realtek RTL8152 Based USB 2.0 Ethernet Adapters"
27 #define MODULENAME "r8152"
28
29 #define R8152_PHY_ID 32
30
31 #define PLA_IDR 0xc000
32 #define PLA_RCR 0xc010
33 #define PLA_RMS 0xc016
34 #define PLA_RXFIFO_CTRL0 0xc0a0
35 #define PLA_RXFIFO_CTRL1 0xc0a4
36 #define PLA_RXFIFO_CTRL2 0xc0a8
37 #define PLA_FMC 0xc0b4
38 #define PLA_CFG_WOL 0xc0b6
39 #define PLA_MAR 0xcd00
40 #define PAL_BDC_CR 0xd1a0
41 #define PLA_LEDSEL 0xdd90
42 #define PLA_LED_FEATURE 0xdd92
43 #define PLA_PHYAR 0xde00
44 #define PLA_GPHY_INTR_IMR 0xe022
45 #define PLA_EEE_CR 0xe040
46 #define PLA_EEEP_CR 0xe080
47 #define PLA_MAC_PWR_CTRL 0xe0c0
48 #define PLA_TCR0 0xe610
49 #define PLA_TCR1 0xe612
50 #define PLA_TXFIFO_CTRL 0xe618
51 #define PLA_RSTTELLY 0xe800
52 #define PLA_CR 0xe813
53 #define PLA_CRWECR 0xe81c
54 #define PLA_CONFIG5 0xe822
55 #define PLA_PHY_PWR 0xe84c
56 #define PLA_OOB_CTRL 0xe84f
57 #define PLA_CPCR 0xe854
58 #define PLA_MISC_0 0xe858
59 #define PLA_MISC_1 0xe85a
60 #define PLA_OCP_GPHY_BASE 0xe86c
61 #define PLA_TELLYCNT 0xe890
62 #define PLA_SFF_STS_7 0xe8de
63 #define PLA_PHYSTATUS 0xe908
64 #define PLA_BP_BA 0xfc26
65 #define PLA_BP_0 0xfc28
66 #define PLA_BP_1 0xfc2a
67 #define PLA_BP_2 0xfc2c
68 #define PLA_BP_3 0xfc2e
69 #define PLA_BP_4 0xfc30
70 #define PLA_BP_5 0xfc32
71 #define PLA_BP_6 0xfc34
72 #define PLA_BP_7 0xfc36
73
74 #define USB_DEV_STAT 0xb808
75 #define USB_USB_CTRL 0xd406
76 #define USB_PHY_CTRL 0xd408
77 #define USB_TX_AGG 0xd40a
78 #define USB_RX_BUF_TH 0xd40c
79 #define USB_USB_TIMER 0xd428
80 #define USB_PM_CTRL_STATUS 0xd432
81 #define USB_TX_DMA 0xd434
82 #define USB_UPS_CTRL 0xd800
83 #define USB_BP_BA 0xfc26
84 #define USB_BP_0 0xfc28
85 #define USB_BP_1 0xfc2a
86 #define USB_BP_2 0xfc2c
87 #define USB_BP_3 0xfc2e
88 #define USB_BP_4 0xfc30
89 #define USB_BP_5 0xfc32
90 #define USB_BP_6 0xfc34
91 #define USB_BP_7 0xfc36
92
93 /* OCP Registers */
94 #define OCP_ALDPS_CONFIG 0x2010
95 #define OCP_EEE_CONFIG1 0x2080
96 #define OCP_EEE_CONFIG2 0x2092
97 #define OCP_EEE_CONFIG3 0x2094
98 #define OCP_EEE_AR 0xa41a
99 #define OCP_EEE_DATA 0xa41c
100
101 /* PLA_RCR */
102 #define RCR_AAP 0x00000001
103 #define RCR_APM 0x00000002
104 #define RCR_AM 0x00000004
105 #define RCR_AB 0x00000008
106 #define RCR_ACPT_ALL (RCR_AAP | RCR_APM | RCR_AM | RCR_AB)
107
108 /* PLA_RXFIFO_CTRL0 */
109 #define RXFIFO_THR1_NORMAL 0x00080002
110 #define RXFIFO_THR1_OOB 0x01800003
111
112 /* PLA_RXFIFO_CTRL1 */
113 #define RXFIFO_THR2_FULL 0x00000060
114 #define RXFIFO_THR2_HIGH 0x00000038
115 #define RXFIFO_THR2_OOB 0x0000004a
116
117 /* PLA_RXFIFO_CTRL2 */
118 #define RXFIFO_THR3_FULL 0x00000078
119 #define RXFIFO_THR3_HIGH 0x00000048
120 #define RXFIFO_THR3_OOB 0x0000005a
121
122 /* PLA_TXFIFO_CTRL */
123 #define TXFIFO_THR_NORMAL 0x00400008
124
125 /* PLA_FMC */
126 #define FMC_FCR_MCU_EN 0x0001
127
128 /* PLA_EEEP_CR */
129 #define EEEP_CR_EEEP_TX 0x0002
130
131 /* PLA_TCR0 */
132 #define TCR0_TX_EMPTY 0x0800
133 #define TCR0_AUTO_FIFO 0x0080
134
135 /* PLA_TCR1 */
136 #define VERSION_MASK 0x7cf0
137
138 /* PLA_CR */
139 #define CR_RST 0x10
140 #define CR_RE 0x08
141 #define CR_TE 0x04
142
143 /* PLA_CRWECR */
144 #define CRWECR_NORAML 0x00
145 #define CRWECR_CONFIG 0xc0
146
147 /* PLA_OOB_CTRL */
148 #define NOW_IS_OOB 0x80
149 #define TXFIFO_EMPTY 0x20
150 #define RXFIFO_EMPTY 0x10
151 #define LINK_LIST_READY 0x02
152 #define DIS_MCU_CLROOB 0x01
153 #define FIFO_EMPTY (TXFIFO_EMPTY | RXFIFO_EMPTY)
154
155 /* PLA_MISC_1 */
156 #define RXDY_GATED_EN 0x0008
157
158 /* PLA_SFF_STS_7 */
159 #define RE_INIT_LL 0x8000
160 #define MCU_BORW_EN 0x4000
161
162 /* PLA_CPCR */
163 #define CPCR_RX_VLAN 0x0040
164
165 /* PLA_CFG_WOL */
166 #define MAGIC_EN 0x0001
167
168 /* PAL_BDC_CR */
169 #define ALDPS_PROXY_MODE 0x0001
170
171 /* PLA_CONFIG5 */
172 #define LAN_WAKE_EN 0x0002
173
174 /* PLA_LED_FEATURE */
175 #define LED_MODE_MASK 0x0700
176
177 /* PLA_PHY_PWR */
178 #define TX_10M_IDLE_EN 0x0080
179 #define PFM_PWM_SWITCH 0x0040
180
181 /* PLA_MAC_PWR_CTRL */
182 #define D3_CLK_GATED_EN 0x00004000
183 #define MCU_CLK_RATIO 0x07010f07
184 #define MCU_CLK_RATIO_MASK 0x0f0f0f0f
185
186 /* PLA_GPHY_INTR_IMR */
187 #define GPHY_STS_MSK 0x0001
188 #define SPEED_DOWN_MSK 0x0002
189 #define SPDWN_RXDV_MSK 0x0004
190 #define SPDWN_LINKCHG_MSK 0x0008
191
192 /* PLA_PHYAR */
193 #define PHYAR_FLAG 0x80000000
194
195 /* PLA_EEE_CR */
196 #define EEE_RX_EN 0x0001
197 #define EEE_TX_EN 0x0002
198
199 /* USB_DEV_STAT */
200 #define STAT_SPEED_MASK 0x0006
201 #define STAT_SPEED_HIGH 0x0000
202 #define STAT_SPEED_FULL 0x0001
203
204 /* USB_TX_AGG */
205 #define TX_AGG_MAX_THRESHOLD 0x03
206
207 /* USB_RX_BUF_TH */
208 #define RX_BUF_THR 0x7a120180
209
210 /* USB_TX_DMA */
211 #define TEST_MODE_DISABLE 0x00000001
212 #define TX_SIZE_ADJUST1 0x00000100
213
214 /* USB_UPS_CTRL */
215 #define POWER_CUT 0x0100
216
217 /* USB_PM_CTRL_STATUS */
218 #define RWSUME_INDICATE 0x0001
219
220 /* USB_USB_CTRL */
221 #define RX_AGG_DISABLE 0x0010
222
223 /* OCP_ALDPS_CONFIG */
224 #define ENPWRSAVE 0x8000
225 #define ENPDNPS 0x0200
226 #define LINKENA 0x0100
227 #define DIS_SDSAVE 0x0010
228
229 /* OCP_EEE_CONFIG1 */
230 #define RG_TXLPI_MSK_HFDUP 0x8000
231 #define RG_MATCLR_EN 0x4000
232 #define EEE_10_CAP 0x2000
233 #define EEE_NWAY_EN 0x1000
234 #define TX_QUIET_EN 0x0200
235 #define RX_QUIET_EN 0x0100
236 #define SDRISETIME 0x0010 /* bit 4 ~ 6 */
237 #define RG_RXLPI_MSK_HFDUP 0x0008
238 #define SDFALLTIME 0x0007 /* bit 0 ~ 2 */
239
240 /* OCP_EEE_CONFIG2 */
241 #define RG_LPIHYS_NUM 0x7000 /* bit 12 ~ 15 */
242 #define RG_DACQUIET_EN 0x0400
243 #define RG_LDVQUIET_EN 0x0200
244 #define RG_CKRSEL 0x0020
245 #define RG_EEEPRG_EN 0x0010
246
247 /* OCP_EEE_CONFIG3 */
248 #define FST_SNR_EYE_R 0x1500 /* bit 7 ~ 15 */
249 #define RG_LFS_SEL 0x0060 /* bit 6 ~ 5 */
250 #define MSK_PH 0x0006 /* bit 0 ~ 3 */
251
252 /* OCP_EEE_AR */
253 /* bit[15:14] function */
254 #define FUN_ADDR 0x0000
255 #define FUN_DATA 0x4000
256 /* bit[4:0] device addr */
257 #define DEVICE_ADDR 0x0007
258
259 /* OCP_EEE_DATA */
260 #define EEE_ADDR 0x003C
261 #define EEE_DATA 0x0002
262
263 enum rtl_register_content {
264 _100bps = 0x08,
265 _10bps = 0x04,
266 LINK_STATUS = 0x02,
267 FULL_DUP = 0x01,
268 };
269
270 #define RTL8152_REQT_READ 0xc0
271 #define RTL8152_REQT_WRITE 0x40
272 #define RTL8152_REQ_GET_REGS 0x05
273 #define RTL8152_REQ_SET_REGS 0x05
274
275 #define BYTE_EN_DWORD 0xff
276 #define BYTE_EN_WORD 0x33
277 #define BYTE_EN_BYTE 0x11
278 #define BYTE_EN_SIX_BYTES 0x3f
279 #define BYTE_EN_START_MASK 0x0f
280 #define BYTE_EN_END_MASK 0xf0
281
282 #define RTL8152_RMS (VLAN_ETH_FRAME_LEN + VLAN_HLEN)
283 #define RTL8152_TX_TIMEOUT (HZ)
284
285 /* rtl8152 flags */
286 enum rtl8152_flags {
287 RTL8152_UNPLUG = 0,
288 RX_URB_FAIL,
289 RTL8152_SET_RX_MODE,
290 WORK_ENABLE
291 };
292
293 /* Define these values to match your device */
294 #define VENDOR_ID_REALTEK 0x0bda
295 #define PRODUCT_ID_RTL8152 0x8152
296
297 #define MCU_TYPE_PLA 0x0100
298 #define MCU_TYPE_USB 0x0000
299
300 struct rx_desc {
301 u32 opts1;
302 #define RX_LEN_MASK 0x7fff
303 u32 opts2;
304 u32 opts3;
305 u32 opts4;
306 u32 opts5;
307 u32 opts6;
308 };
309
310 struct tx_desc {
311 u32 opts1;
312 #define TX_FS (1 << 31) /* First segment of a packet */
313 #define TX_LS (1 << 30) /* Final segment of a packet */
314 #define TX_LEN_MASK 0xffff
315 u32 opts2;
316 };
317
318 struct r8152 {
319 unsigned long flags;
320 struct usb_device *udev;
321 struct tasklet_struct tl;
322 struct net_device *netdev;
323 struct urb *rx_urb, *tx_urb;
324 struct sk_buff *tx_skb, *rx_skb;
325 struct delayed_work schedule;
326 struct mii_if_info mii;
327 u32 msg_enable;
328 u16 ocp_base;
329 u8 version;
330 u8 speed;
331 };
332
333 enum rtl_version {
334 RTL_VER_UNKNOWN = 0,
335 RTL_VER_01,
336 RTL_VER_02
337 };
338
339 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
340 * The RTL chips use a 64 element hash table based on the Ethernet CRC.
341 */
342 static const int multicast_filter_limit = 32;
343
344 static
345 int get_registers(struct r8152 *tp, u16 value, u16 index, u16 size, void *data)
346 {
347 return usb_control_msg(tp->udev, usb_rcvctrlpipe(tp->udev, 0),
348 RTL8152_REQ_GET_REGS, RTL8152_REQT_READ,
349 value, index, data, size, 500);
350 }
351
352 static
353 int set_registers(struct r8152 *tp, u16 value, u16 index, u16 size, void *data)
354 {
355 return usb_control_msg(tp->udev, usb_sndctrlpipe(tp->udev, 0),
356 RTL8152_REQ_SET_REGS, RTL8152_REQT_WRITE,
357 value, index, data, size, 500);
358 }
359
360 static int generic_ocp_read(struct r8152 *tp, u16 index, u16 size,
361 void *data, u16 type)
362 {
363 u16 limit = 64;
364 int ret = 0;
365
366 if (test_bit(RTL8152_UNPLUG, &tp->flags))
367 return -ENODEV;
368
369 /* both size and indix must be 4 bytes align */
370 if ((size & 3) || !size || (index & 3) || !data)
371 return -EPERM;
372
373 if ((u32)index + (u32)size > 0xffff)
374 return -EPERM;
375
376 while (size) {
377 if (size > limit) {
378 ret = get_registers(tp, index, type, limit, data);
379 if (ret < 0)
380 break;
381
382 index += limit;
383 data += limit;
384 size -= limit;
385 } else {
386 ret = get_registers(tp, index, type, size, data);
387 if (ret < 0)
388 break;
389
390 index += size;
391 data += size;
392 size = 0;
393 break;
394 }
395 }
396
397 return ret;
398 }
399
400 static int generic_ocp_write(struct r8152 *tp, u16 index, u16 byteen,
401 u16 size, void *data, u16 type)
402 {
403 int ret;
404 u16 byteen_start, byteen_end, byen;
405 u16 limit = 512;
406
407 if (test_bit(RTL8152_UNPLUG, &tp->flags))
408 return -ENODEV;
409
410 /* both size and indix must be 4 bytes align */
411 if ((size & 3) || !size || (index & 3) || !data)
412 return -EPERM;
413
414 if ((u32)index + (u32)size > 0xffff)
415 return -EPERM;
416
417 byteen_start = byteen & BYTE_EN_START_MASK;
418 byteen_end = byteen & BYTE_EN_END_MASK;
419
420 byen = byteen_start | (byteen_start << 4);
421 ret = set_registers(tp, index, type | byen, 4, data);
422 if (ret < 0)
423 goto error1;
424
425 index += 4;
426 data += 4;
427 size -= 4;
428
429 if (size) {
430 size -= 4;
431
432 while (size) {
433 if (size > limit) {
434 ret = set_registers(tp, index,
435 type | BYTE_EN_DWORD,
436 limit, data);
437 if (ret < 0)
438 goto error1;
439
440 index += limit;
441 data += limit;
442 size -= limit;
443 } else {
444 ret = set_registers(tp, index,
445 type | BYTE_EN_DWORD,
446 size, data);
447 if (ret < 0)
448 goto error1;
449
450 index += size;
451 data += size;
452 size = 0;
453 break;
454 }
455 }
456
457 byen = byteen_end | (byteen_end >> 4);
458 ret = set_registers(tp, index, type | byen, 4, data);
459 if (ret < 0)
460 goto error1;
461 }
462
463 error1:
464 return ret;
465 }
466
467 static inline
468 int pla_ocp_read(struct r8152 *tp, u16 index, u16 size, void *data)
469 {
470 return generic_ocp_read(tp, index, size, data, MCU_TYPE_PLA);
471 }
472
473 static inline
474 int pla_ocp_write(struct r8152 *tp, u16 index, u16 byteen, u16 size, void *data)
475 {
476 return generic_ocp_write(tp, index, byteen, size, data, MCU_TYPE_PLA);
477 }
478
479 static inline
480 int usb_ocp_read(struct r8152 *tp, u16 index, u16 size, void *data)
481 {
482 return generic_ocp_read(tp, index, size, data, MCU_TYPE_USB);
483 }
484
485 static inline
486 int usb_ocp_write(struct r8152 *tp, u16 index, u16 byteen, u16 size, void *data)
487 {
488 return generic_ocp_write(tp, index, byteen, size, data, MCU_TYPE_USB);
489 }
490
491 static u32 ocp_read_dword(struct r8152 *tp, u16 type, u16 index)
492 {
493 u32 data;
494
495 if (type == MCU_TYPE_PLA)
496 pla_ocp_read(tp, index, sizeof(data), &data);
497 else
498 usb_ocp_read(tp, index, sizeof(data), &data);
499
500 return __le32_to_cpu(data);
501 }
502
503 static void ocp_write_dword(struct r8152 *tp, u16 type, u16 index, u32 data)
504 {
505 if (type == MCU_TYPE_PLA)
506 pla_ocp_write(tp, index, BYTE_EN_DWORD, sizeof(data), &data);
507 else
508 usb_ocp_write(tp, index, BYTE_EN_DWORD, sizeof(data), &data);
509 }
510
511 static u16 ocp_read_word(struct r8152 *tp, u16 type, u16 index)
512 {
513 u32 data;
514 u8 shift = index & 2;
515
516 index &= ~3;
517
518 if (type == MCU_TYPE_PLA)
519 pla_ocp_read(tp, index, sizeof(data), &data);
520 else
521 usb_ocp_read(tp, index, sizeof(data), &data);
522
523 data = __le32_to_cpu(data);
524 data >>= (shift * 8);
525 data &= 0xffff;
526
527 return (u16)data;
528 }
529
530 static void ocp_write_word(struct r8152 *tp, u16 type, u16 index, u32 data)
531 {
532 u32 tmp, mask = 0xffff;
533 u16 byen = BYTE_EN_WORD;
534 u8 shift = index & 2;
535
536 data &= mask;
537
538 if (index & 2) {
539 byen <<= shift;
540 mask <<= (shift * 8);
541 data <<= (shift * 8);
542 index &= ~3;
543 }
544
545 if (type == MCU_TYPE_PLA)
546 pla_ocp_read(tp, index, sizeof(tmp), &tmp);
547 else
548 usb_ocp_read(tp, index, sizeof(tmp), &tmp);
549
550 tmp = __le32_to_cpu(tmp) & ~mask;
551 tmp |= data;
552 tmp = __cpu_to_le32(tmp);
553
554 if (type == MCU_TYPE_PLA)
555 pla_ocp_write(tp, index, byen, sizeof(tmp), &tmp);
556 else
557 usb_ocp_write(tp, index, byen, sizeof(tmp), &tmp);
558 }
559
560 static u8 ocp_read_byte(struct r8152 *tp, u16 type, u16 index)
561 {
562 u32 data;
563 u8 shift = index & 3;
564
565 index &= ~3;
566
567 if (type == MCU_TYPE_PLA)
568 pla_ocp_read(tp, index, sizeof(data), &data);
569 else
570 usb_ocp_read(tp, index, sizeof(data), &data);
571
572 data = __le32_to_cpu(data);
573 data >>= (shift * 8);
574 data &= 0xff;
575
576 return (u8)data;
577 }
578
579 static void ocp_write_byte(struct r8152 *tp, u16 type, u16 index, u32 data)
580 {
581 u32 tmp, mask = 0xff;
582 u16 byen = BYTE_EN_BYTE;
583 u8 shift = index & 3;
584
585 data &= mask;
586
587 if (index & 3) {
588 byen <<= shift;
589 mask <<= (shift * 8);
590 data <<= (shift * 8);
591 index &= ~3;
592 }
593
594 if (type == MCU_TYPE_PLA)
595 pla_ocp_read(tp, index, sizeof(tmp), &tmp);
596 else
597 usb_ocp_read(tp, index, sizeof(tmp), &tmp);
598
599 tmp = __le32_to_cpu(tmp) & ~mask;
600 tmp |= data;
601 tmp = __cpu_to_le32(tmp);
602
603 if (type == MCU_TYPE_PLA)
604 pla_ocp_write(tp, index, byen, sizeof(tmp), &tmp);
605 else
606 usb_ocp_write(tp, index, byen, sizeof(tmp), &tmp);
607 }
608
609 static void r8152_mdio_write(struct r8152 *tp, u32 reg_addr, u32 value)
610 {
611 u32 ocp_data;
612 int i;
613
614 ocp_data = PHYAR_FLAG | ((reg_addr & 0x1f) << 16) |
615 (value & 0xffff);
616
617 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_PHYAR, ocp_data);
618
619 for (i = 20; i > 0; i--) {
620 udelay(25);
621 ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_PHYAR);
622 if (!(ocp_data & PHYAR_FLAG))
623 break;
624 }
625 udelay(20);
626 }
627
628 static int r8152_mdio_read(struct r8152 *tp, u32 reg_addr)
629 {
630 u32 ocp_data;
631 int i;
632
633 ocp_data = (reg_addr & 0x1f) << 16;
634 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_PHYAR, ocp_data);
635
636 for (i = 20; i > 0; i--) {
637 udelay(25);
638 ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_PHYAR);
639 if (ocp_data & PHYAR_FLAG)
640 break;
641 }
642 udelay(20);
643
644 if (!(ocp_data & PHYAR_FLAG))
645 return -EAGAIN;
646
647 return (u16)(ocp_data & 0xffff);
648 }
649
650 static int read_mii_word(struct net_device *netdev, int phy_id, int reg)
651 {
652 struct r8152 *tp = netdev_priv(netdev);
653
654 if (phy_id != R8152_PHY_ID)
655 return -EINVAL;
656
657 return r8152_mdio_read(tp, reg);
658 }
659
660 static
661 void write_mii_word(struct net_device *netdev, int phy_id, int reg, int val)
662 {
663 struct r8152 *tp = netdev_priv(netdev);
664
665 if (phy_id != R8152_PHY_ID)
666 return;
667
668 r8152_mdio_write(tp, reg, val);
669 }
670
671 static void ocp_reg_write(struct r8152 *tp, u16 addr, u16 data)
672 {
673 u16 ocp_base, ocp_index;
674
675 ocp_base = addr & 0xf000;
676 if (ocp_base != tp->ocp_base) {
677 ocp_write_word(tp, MCU_TYPE_PLA, PLA_OCP_GPHY_BASE, ocp_base);
678 tp->ocp_base = ocp_base;
679 }
680
681 ocp_index = (addr & 0x0fff) | 0xb000;
682 ocp_write_word(tp, MCU_TYPE_PLA, ocp_index, data);
683 }
684
685 static inline void set_ethernet_addr(struct r8152 *tp)
686 {
687 struct net_device *dev = tp->netdev;
688 u8 *node_id;
689
690 node_id = kmalloc(sizeof(u8) * 8, GFP_KERNEL);
691 if (!node_id) {
692 netif_err(tp, probe, dev, "out of memory");
693 return;
694 }
695
696 if (pla_ocp_read(tp, PLA_IDR, sizeof(u8) * 8, node_id) < 0)
697 netif_notice(tp, probe, dev, "inet addr fail\n");
698 else {
699 memcpy(dev->dev_addr, node_id, dev->addr_len);
700 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
701 }
702 kfree(node_id);
703 }
704
705 static int rtl8152_set_mac_address(struct net_device *netdev, void *p)
706 {
707 struct r8152 *tp = netdev_priv(netdev);
708 struct sockaddr *addr = p;
709
710 if (!is_valid_ether_addr(addr->sa_data))
711 return -EADDRNOTAVAIL;
712
713 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
714
715 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CRWECR, CRWECR_CONFIG);
716 pla_ocp_write(tp, PLA_IDR, BYTE_EN_SIX_BYTES, 8, addr->sa_data);
717 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CRWECR, CRWECR_NORAML);
718
719 return 0;
720 }
721
722 static int alloc_all_urbs(struct r8152 *tp)
723 {
724 tp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
725 if (!tp->rx_urb)
726 return 0;
727 tp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
728 if (!tp->tx_urb) {
729 usb_free_urb(tp->rx_urb);
730 return 0;
731 }
732
733 return 1;
734 }
735
736 static void free_all_urbs(struct r8152 *tp)
737 {
738 usb_free_urb(tp->rx_urb);
739 usb_free_urb(tp->tx_urb);
740 }
741
742 static struct net_device_stats *rtl8152_get_stats(struct net_device *dev)
743 {
744 return &dev->stats;
745 }
746
747 static void read_bulk_callback(struct urb *urb)
748 {
749 struct r8152 *tp;
750 unsigned pkt_len;
751 struct sk_buff *skb;
752 struct net_device *netdev;
753 struct net_device_stats *stats;
754 int status = urb->status;
755 int result;
756 struct rx_desc *rx_desc;
757
758 tp = urb->context;
759 if (!tp)
760 return;
761 if (test_bit(RTL8152_UNPLUG, &tp->flags))
762 return;
763 netdev = tp->netdev;
764 if (!netif_device_present(netdev))
765 return;
766
767 stats = rtl8152_get_stats(netdev);
768 switch (status) {
769 case 0:
770 break;
771 case -ESHUTDOWN:
772 set_bit(RTL8152_UNPLUG, &tp->flags);
773 netif_device_detach(tp->netdev);
774 case -ENOENT:
775 return; /* the urb is in unlink state */
776 case -ETIME:
777 pr_warn_ratelimited("may be reset is needed?..\n");
778 goto goon;
779 default:
780 pr_warn_ratelimited("Rx status %d\n", status);
781 goto goon;
782 }
783
784 /* protect against short packets (tell me why we got some?!?) */
785 if (urb->actual_length < sizeof(*rx_desc))
786 goto goon;
787
788
789 rx_desc = (struct rx_desc *)urb->transfer_buffer;
790 pkt_len = le32_to_cpu(rx_desc->opts1) & RX_LEN_MASK;
791 if (urb->actual_length < sizeof(struct rx_desc) + pkt_len)
792 goto goon;
793
794 skb = netdev_alloc_skb_ip_align(netdev, pkt_len);
795 if (!skb)
796 goto goon;
797
798 memcpy(skb->data, tp->rx_skb->data + sizeof(struct rx_desc), pkt_len);
799 skb_put(skb, pkt_len);
800 skb->protocol = eth_type_trans(skb, netdev);
801 netif_rx(skb);
802 stats->rx_packets++;
803 stats->rx_bytes += pkt_len;
804 goon:
805 usb_fill_bulk_urb(tp->rx_urb, tp->udev, usb_rcvbulkpipe(tp->udev, 1),
806 tp->rx_skb->data, RTL8152_RMS + sizeof(struct rx_desc),
807 (usb_complete_t)read_bulk_callback, tp);
808 result = usb_submit_urb(tp->rx_urb, GFP_ATOMIC);
809 if (result == -ENODEV) {
810 netif_device_detach(tp->netdev);
811 } else if (result) {
812 set_bit(RX_URB_FAIL, &tp->flags);
813 goto resched;
814 } else {
815 clear_bit(RX_URB_FAIL, &tp->flags);
816 }
817
818 return;
819 resched:
820 tasklet_schedule(&tp->tl);
821 }
822
823 static void rx_fixup(unsigned long data)
824 {
825 struct r8152 *tp;
826 int status;
827
828 tp = (struct r8152 *)data;
829 if (!test_bit(WORK_ENABLE, &tp->flags))
830 return;
831
832 status = usb_submit_urb(tp->rx_urb, GFP_ATOMIC);
833 if (status == -ENODEV) {
834 netif_device_detach(tp->netdev);
835 } else if (status) {
836 set_bit(RX_URB_FAIL, &tp->flags);
837 goto tlsched;
838 } else {
839 clear_bit(RX_URB_FAIL, &tp->flags);
840 }
841
842 return;
843 tlsched:
844 tasklet_schedule(&tp->tl);
845 }
846
847 static void write_bulk_callback(struct urb *urb)
848 {
849 struct r8152 *tp;
850 int status = urb->status;
851
852 tp = urb->context;
853 if (!tp)
854 return;
855 dev_kfree_skb_irq(tp->tx_skb);
856 if (!netif_device_present(tp->netdev))
857 return;
858 if (status)
859 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
860 tp->netdev->name, status);
861 tp->netdev->trans_start = jiffies;
862 netif_wake_queue(tp->netdev);
863 }
864
865 static void rtl8152_tx_timeout(struct net_device *netdev)
866 {
867 struct r8152 *tp = netdev_priv(netdev);
868 struct net_device_stats *stats = rtl8152_get_stats(netdev);
869 netif_warn(tp, tx_err, netdev, "Tx timeout.\n");
870 usb_unlink_urb(tp->tx_urb);
871 stats->tx_errors++;
872 }
873
874 static void rtl8152_set_rx_mode(struct net_device *netdev)
875 {
876 struct r8152 *tp = netdev_priv(netdev);
877
878 if (tp->speed & LINK_STATUS)
879 set_bit(RTL8152_SET_RX_MODE, &tp->flags);
880 }
881
882 static void _rtl8152_set_rx_mode(struct net_device *netdev)
883 {
884 struct r8152 *tp = netdev_priv(netdev);
885 u32 tmp, *mc_filter; /* Multicast hash filter */
886 u32 ocp_data;
887
888 mc_filter = kmalloc(sizeof(u32) * 2, GFP_KERNEL);
889 if (!mc_filter) {
890 netif_err(tp, link, netdev, "out of memory");
891 return;
892 }
893
894 clear_bit(RTL8152_SET_RX_MODE, &tp->flags);
895 netif_stop_queue(netdev);
896 ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_RCR);
897 ocp_data &= ~RCR_ACPT_ALL;
898 ocp_data |= RCR_AB | RCR_APM;
899
900 if (netdev->flags & IFF_PROMISC) {
901 /* Unconditionally log net taps. */
902 netif_notice(tp, link, netdev, "Promiscuous mode enabled\n");
903 ocp_data |= RCR_AM | RCR_AAP;
904 mc_filter[1] = mc_filter[0] = 0xffffffff;
905 } else if ((netdev_mc_count(netdev) > multicast_filter_limit) ||
906 (netdev->flags & IFF_ALLMULTI)) {
907 /* Too many to filter perfectly -- accept all multicasts. */
908 ocp_data |= RCR_AM;
909 mc_filter[1] = mc_filter[0] = 0xffffffff;
910 } else {
911 struct netdev_hw_addr *ha;
912
913 mc_filter[1] = mc_filter[0] = 0;
914 netdev_for_each_mc_addr(ha, netdev) {
915 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
916 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
917 ocp_data |= RCR_AM;
918 }
919 }
920
921 tmp = mc_filter[0];
922 mc_filter[0] = __cpu_to_le32(swab32(mc_filter[1]));
923 mc_filter[1] = __cpu_to_le32(swab32(tmp));
924
925 pla_ocp_write(tp, PLA_MAR, BYTE_EN_DWORD, sizeof(u32) * 2, mc_filter);
926 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RCR, ocp_data);
927 netif_wake_queue(netdev);
928 kfree(mc_filter);
929 }
930
931 static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb,
932 struct net_device *netdev)
933 {
934 struct r8152 *tp = netdev_priv(netdev);
935 struct net_device_stats *stats = rtl8152_get_stats(netdev);
936 struct tx_desc *tx_desc;
937 unsigned int len;
938 int res;
939
940 netif_stop_queue(netdev);
941 len = skb->len;
942 if (skb_header_cloned(skb) || skb_headroom(skb) < sizeof(*tx_desc)) {
943 struct sk_buff *tx_skb;
944
945 tx_skb = skb_copy_expand(skb, sizeof(*tx_desc), 0, GFP_ATOMIC);
946 dev_kfree_skb_any(skb);
947 if (!tx_skb) {
948 stats->tx_dropped++;
949 netif_wake_queue(netdev);
950 return NETDEV_TX_OK;
951 }
952 skb = tx_skb;
953 }
954 tx_desc = (struct tx_desc *)skb_push(skb, sizeof(*tx_desc));
955 memset(tx_desc, 0, sizeof(*tx_desc));
956 tx_desc->opts1 = cpu_to_le32((len & TX_LEN_MASK) | TX_FS | TX_LS);
957 tp->tx_skb = skb;
958 skb_tx_timestamp(skb);
959 usb_fill_bulk_urb(tp->tx_urb, tp->udev, usb_sndbulkpipe(tp->udev, 2),
960 skb->data, skb->len,
961 (usb_complete_t)write_bulk_callback, tp);
962 res = usb_submit_urb(tp->tx_urb, GFP_ATOMIC);
963 if (res) {
964 /* Can we get/handle EPIPE here? */
965 if (res == -ENODEV) {
966 netif_device_detach(tp->netdev);
967 } else {
968 netif_warn(tp, tx_err, netdev,
969 "failed tx_urb %d\n", res);
970 stats->tx_errors++;
971 netif_start_queue(netdev);
972 }
973 } else {
974 stats->tx_packets++;
975 stats->tx_bytes += skb->len;
976 }
977
978 return NETDEV_TX_OK;
979 }
980
981 static void r8152b_reset_packet_filter(struct r8152 *tp)
982 {
983 u32 ocp_data;
984
985 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_FMC);
986 ocp_data &= ~FMC_FCR_MCU_EN;
987 ocp_write_word(tp, MCU_TYPE_PLA, PLA_FMC, ocp_data);
988 ocp_data |= FMC_FCR_MCU_EN;
989 ocp_write_word(tp, MCU_TYPE_PLA, PLA_FMC, ocp_data);
990 }
991
992 static void rtl8152_nic_reset(struct r8152 *tp)
993 {
994 int i;
995
996 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CR, CR_RST);
997
998 for (i = 0; i < 1000; i++) {
999 if (!(ocp_read_byte(tp, MCU_TYPE_PLA, PLA_CR) & CR_RST))
1000 break;
1001 udelay(100);
1002 }
1003 }
1004
1005 static inline u8 rtl8152_get_speed(struct r8152 *tp)
1006 {
1007 return ocp_read_byte(tp, MCU_TYPE_PLA, PLA_PHYSTATUS);
1008 }
1009
1010 static int rtl8152_enable(struct r8152 *tp)
1011 {
1012 u32 ocp_data;
1013 u8 speed;
1014
1015 speed = rtl8152_get_speed(tp);
1016 if (speed & _100bps) {
1017 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_EEEP_CR);
1018 ocp_data &= ~EEEP_CR_EEEP_TX;
1019 ocp_write_word(tp, MCU_TYPE_PLA, PLA_EEEP_CR, ocp_data);
1020 } else {
1021 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_EEEP_CR);
1022 ocp_data |= EEEP_CR_EEEP_TX;
1023 ocp_write_word(tp, MCU_TYPE_PLA, PLA_EEEP_CR, ocp_data);
1024 }
1025
1026 r8152b_reset_packet_filter(tp);
1027
1028 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_CR);
1029 ocp_data |= CR_RE | CR_TE;
1030 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CR, ocp_data);
1031
1032 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MISC_1);
1033 ocp_data &= ~RXDY_GATED_EN;
1034 ocp_write_word(tp, MCU_TYPE_PLA, PLA_MISC_1, ocp_data);
1035
1036 usb_fill_bulk_urb(tp->rx_urb, tp->udev, usb_rcvbulkpipe(tp->udev, 1),
1037 tp->rx_skb->data, RTL8152_RMS + sizeof(struct rx_desc),
1038 (usb_complete_t)read_bulk_callback, tp);
1039
1040 return usb_submit_urb(tp->rx_urb, GFP_KERNEL);
1041 }
1042
1043 static void rtl8152_disable(struct r8152 *tp)
1044 {
1045 u32 ocp_data;
1046 int i;
1047
1048 ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_RCR);
1049 ocp_data &= ~RCR_ACPT_ALL;
1050 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RCR, ocp_data);
1051
1052 usb_kill_urb(tp->tx_urb);
1053
1054 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MISC_1);
1055 ocp_data |= RXDY_GATED_EN;
1056 ocp_write_word(tp, MCU_TYPE_PLA, PLA_MISC_1, ocp_data);
1057
1058 for (i = 0; i < 1000; i++) {
1059 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1060 if ((ocp_data & FIFO_EMPTY) == FIFO_EMPTY)
1061 break;
1062 mdelay(1);
1063 }
1064
1065 for (i = 0; i < 1000; i++) {
1066 if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_TCR0) & TCR0_TX_EMPTY)
1067 break;
1068 mdelay(1);
1069 }
1070
1071 usb_kill_urb(tp->rx_urb);
1072
1073 rtl8152_nic_reset(tp);
1074 }
1075
1076 static void r8152b_exit_oob(struct r8152 *tp)
1077 {
1078 u32 ocp_data;
1079 int i;
1080
1081 ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_RCR);
1082 ocp_data &= ~RCR_ACPT_ALL;
1083 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RCR, ocp_data);
1084
1085 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MISC_1);
1086 ocp_data |= RXDY_GATED_EN;
1087 ocp_write_word(tp, MCU_TYPE_PLA, PLA_MISC_1, ocp_data);
1088
1089 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CRWECR, CRWECR_NORAML);
1090 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CR, 0x00);
1091
1092 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1093 ocp_data &= ~NOW_IS_OOB;
1094 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL, ocp_data);
1095
1096 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_SFF_STS_7);
1097 ocp_data &= ~MCU_BORW_EN;
1098 ocp_write_word(tp, MCU_TYPE_PLA, PLA_SFF_STS_7, ocp_data);
1099
1100 for (i = 0; i < 1000; i++) {
1101 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1102 if (ocp_data & LINK_LIST_READY)
1103 break;
1104 mdelay(1);
1105 }
1106
1107 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_SFF_STS_7);
1108 ocp_data |= RE_INIT_LL;
1109 ocp_write_word(tp, MCU_TYPE_PLA, PLA_SFF_STS_7, ocp_data);
1110
1111 for (i = 0; i < 1000; i++) {
1112 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1113 if (ocp_data & LINK_LIST_READY)
1114 break;
1115 mdelay(1);
1116 }
1117
1118 rtl8152_nic_reset(tp);
1119
1120 /* rx share fifo credit full threshold */
1121 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL0, RXFIFO_THR1_NORMAL);
1122
1123 ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_DEV_STAT);
1124 ocp_data &= STAT_SPEED_MASK;
1125 if (ocp_data == STAT_SPEED_FULL) {
1126 /* rx share fifo credit near full threshold */
1127 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL1,
1128 RXFIFO_THR2_FULL);
1129 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL2,
1130 RXFIFO_THR3_FULL);
1131 } else {
1132 /* rx share fifo credit near full threshold */
1133 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL1,
1134 RXFIFO_THR2_HIGH);
1135 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL2,
1136 RXFIFO_THR3_HIGH);
1137 }
1138
1139 /* TX share fifo free credit full threshold */
1140 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_TXFIFO_CTRL, TXFIFO_THR_NORMAL);
1141
1142 ocp_write_byte(tp, MCU_TYPE_USB, USB_TX_AGG, TX_AGG_MAX_THRESHOLD);
1143 ocp_write_dword(tp, MCU_TYPE_USB, USB_RX_BUF_TH, RX_BUF_THR);
1144 ocp_write_dword(tp, MCU_TYPE_USB, USB_TX_DMA,
1145 TEST_MODE_DISABLE | TX_SIZE_ADJUST1);
1146
1147 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_CPCR);
1148 ocp_data &= ~CPCR_RX_VLAN;
1149 ocp_write_word(tp, MCU_TYPE_PLA, PLA_CPCR, ocp_data);
1150
1151 ocp_write_word(tp, MCU_TYPE_PLA, PLA_RMS, RTL8152_RMS);
1152
1153 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_TCR0);
1154 ocp_data |= TCR0_AUTO_FIFO;
1155 ocp_write_word(tp, MCU_TYPE_PLA, PLA_TCR0, ocp_data);
1156 }
1157
1158 static void r8152b_enter_oob(struct r8152 *tp)
1159 {
1160 u32 ocp_data;
1161 int i;
1162
1163 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1164 ocp_data &= ~NOW_IS_OOB;
1165 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL, ocp_data);
1166
1167 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL0, RXFIFO_THR1_OOB);
1168 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL1, RXFIFO_THR2_OOB);
1169 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RXFIFO_CTRL2, RXFIFO_THR3_OOB);
1170
1171 rtl8152_disable(tp);
1172
1173 for (i = 0; i < 1000; i++) {
1174 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1175 if (ocp_data & LINK_LIST_READY)
1176 break;
1177 mdelay(1);
1178 }
1179
1180 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_SFF_STS_7);
1181 ocp_data |= RE_INIT_LL;
1182 ocp_write_word(tp, MCU_TYPE_PLA, PLA_SFF_STS_7, ocp_data);
1183
1184 for (i = 0; i < 1000; i++) {
1185 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1186 if (ocp_data & LINK_LIST_READY)
1187 break;
1188 mdelay(1);
1189 }
1190
1191 ocp_write_word(tp, MCU_TYPE_PLA, PLA_RMS, RTL8152_RMS);
1192
1193 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_CFG_WOL);
1194 ocp_data |= MAGIC_EN;
1195 ocp_write_word(tp, MCU_TYPE_PLA, PLA_CFG_WOL, ocp_data);
1196
1197 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_CPCR);
1198 ocp_data |= CPCR_RX_VLAN;
1199 ocp_write_word(tp, MCU_TYPE_PLA, PLA_CPCR, ocp_data);
1200
1201 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PAL_BDC_CR);
1202 ocp_data |= ALDPS_PROXY_MODE;
1203 ocp_write_word(tp, MCU_TYPE_PLA, PAL_BDC_CR, ocp_data);
1204
1205 ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
1206 ocp_data |= NOW_IS_OOB | DIS_MCU_CLROOB;
1207 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL, ocp_data);
1208
1209 ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CONFIG5, LAN_WAKE_EN);
1210
1211 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MISC_1);
1212 ocp_data &= ~RXDY_GATED_EN;
1213 ocp_write_word(tp, MCU_TYPE_PLA, PLA_MISC_1, ocp_data);
1214
1215 ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_RCR);
1216 ocp_data |= RCR_APM | RCR_AM | RCR_AB;
1217 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RCR, ocp_data);
1218 }
1219
1220 static void r8152b_disable_aldps(struct r8152 *tp)
1221 {
1222 ocp_reg_write(tp, OCP_ALDPS_CONFIG, ENPDNPS | LINKENA | DIS_SDSAVE);
1223 msleep(20);
1224 }
1225
1226 static inline void r8152b_enable_aldps(struct r8152 *tp)
1227 {
1228 ocp_reg_write(tp, OCP_ALDPS_CONFIG, ENPWRSAVE | ENPDNPS |
1229 LINKENA | DIS_SDSAVE);
1230 }
1231
1232 static int rtl8152_set_speed(struct r8152 *tp, u8 autoneg, u16 speed, u8 duplex)
1233 {
1234 u16 bmcr, anar;
1235 int ret = 0;
1236
1237 cancel_delayed_work_sync(&tp->schedule);
1238 anar = r8152_mdio_read(tp, MII_ADVERTISE);
1239 anar &= ~(ADVERTISE_10HALF | ADVERTISE_10FULL |
1240 ADVERTISE_100HALF | ADVERTISE_100FULL);
1241
1242 if (autoneg == AUTONEG_DISABLE) {
1243 if (speed == SPEED_10) {
1244 bmcr = 0;
1245 anar |= ADVERTISE_10HALF | ADVERTISE_10FULL;
1246 } else if (speed == SPEED_100) {
1247 bmcr = BMCR_SPEED100;
1248 anar |= ADVERTISE_100HALF | ADVERTISE_100FULL;
1249 } else {
1250 ret = -EINVAL;
1251 goto out;
1252 }
1253
1254 if (duplex == DUPLEX_FULL)
1255 bmcr |= BMCR_FULLDPLX;
1256 } else {
1257 if (speed == SPEED_10) {
1258 if (duplex == DUPLEX_FULL)
1259 anar |= ADVERTISE_10HALF | ADVERTISE_10FULL;
1260 else
1261 anar |= ADVERTISE_10HALF;
1262 } else if (speed == SPEED_100) {
1263 if (duplex == DUPLEX_FULL) {
1264 anar |= ADVERTISE_10HALF | ADVERTISE_10FULL;
1265 anar |= ADVERTISE_100HALF | ADVERTISE_100FULL;
1266 } else {
1267 anar |= ADVERTISE_10HALF;
1268 anar |= ADVERTISE_100HALF;
1269 }
1270 } else {
1271 ret = -EINVAL;
1272 goto out;
1273 }
1274
1275 bmcr = BMCR_ANENABLE | BMCR_ANRESTART;
1276 }
1277
1278 r8152_mdio_write(tp, MII_ADVERTISE, anar);
1279 r8152_mdio_write(tp, MII_BMCR, bmcr);
1280
1281 out:
1282 schedule_delayed_work(&tp->schedule, 5 * HZ);
1283
1284 return ret;
1285 }
1286
1287 static void rtl8152_down(struct r8152 *tp)
1288 {
1289 u32 ocp_data;
1290
1291 ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_UPS_CTRL);
1292 ocp_data &= ~POWER_CUT;
1293 ocp_write_word(tp, MCU_TYPE_USB, USB_UPS_CTRL, ocp_data);
1294
1295 r8152b_disable_aldps(tp);
1296 r8152b_enter_oob(tp);
1297 r8152b_enable_aldps(tp);
1298 }
1299
1300 static void set_carrier(struct r8152 *tp)
1301 {
1302 struct net_device *netdev = tp->netdev;
1303 u8 speed;
1304
1305 speed = rtl8152_get_speed(tp);
1306
1307 if (speed & LINK_STATUS) {
1308 if (!(tp->speed & LINK_STATUS)) {
1309 rtl8152_enable(tp);
1310 set_bit(RTL8152_SET_RX_MODE, &tp->flags);
1311 netif_carrier_on(netdev);
1312 }
1313 } else {
1314 if (tp->speed & LINK_STATUS) {
1315 netif_carrier_off(netdev);
1316 rtl8152_disable(tp);
1317 }
1318 }
1319 tp->speed = speed;
1320 }
1321
1322 static void rtl_work_func_t(struct work_struct *work)
1323 {
1324 struct r8152 *tp = container_of(work, struct r8152, schedule.work);
1325
1326 if (!test_bit(WORK_ENABLE, &tp->flags))
1327 goto out1;
1328
1329 if (test_bit(RTL8152_UNPLUG, &tp->flags))
1330 goto out1;
1331
1332 set_carrier(tp);
1333
1334 if (test_bit(RTL8152_SET_RX_MODE, &tp->flags))
1335 _rtl8152_set_rx_mode(tp->netdev);
1336
1337 schedule_delayed_work(&tp->schedule, HZ);
1338
1339 out1:
1340 return;
1341 }
1342
1343 static int rtl8152_open(struct net_device *netdev)
1344 {
1345 struct r8152 *tp = netdev_priv(netdev);
1346 int res = 0;
1347
1348 tp->speed = rtl8152_get_speed(tp);
1349 if (tp->speed & LINK_STATUS) {
1350 res = rtl8152_enable(tp);
1351 if (res) {
1352 if (res == -ENODEV)
1353 netif_device_detach(tp->netdev);
1354
1355 netif_err(tp, ifup, netdev,
1356 "rtl8152_open failed: %d\n", res);
1357 return res;
1358 }
1359
1360 netif_carrier_on(netdev);
1361 } else {
1362 netif_stop_queue(netdev);
1363 netif_carrier_off(netdev);
1364 }
1365
1366 rtl8152_set_speed(tp, AUTONEG_ENABLE, SPEED_100, DUPLEX_FULL);
1367 netif_start_queue(netdev);
1368 set_bit(WORK_ENABLE, &tp->flags);
1369 schedule_delayed_work(&tp->schedule, 0);
1370
1371 return res;
1372 }
1373
1374 static int rtl8152_close(struct net_device *netdev)
1375 {
1376 struct r8152 *tp = netdev_priv(netdev);
1377 int res = 0;
1378
1379 clear_bit(WORK_ENABLE, &tp->flags);
1380 cancel_delayed_work_sync(&tp->schedule);
1381 netif_stop_queue(netdev);
1382 rtl8152_disable(tp);
1383
1384 return res;
1385 }
1386
1387 static void rtl_clear_bp(struct r8152 *tp)
1388 {
1389 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_BP_0, 0);
1390 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_BP_2, 0);
1391 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_BP_4, 0);
1392 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_BP_6, 0);
1393 ocp_write_dword(tp, MCU_TYPE_USB, USB_BP_0, 0);
1394 ocp_write_dword(tp, MCU_TYPE_USB, USB_BP_2, 0);
1395 ocp_write_dword(tp, MCU_TYPE_USB, USB_BP_4, 0);
1396 ocp_write_dword(tp, MCU_TYPE_USB, USB_BP_6, 0);
1397 mdelay(3);
1398 ocp_write_word(tp, MCU_TYPE_PLA, PLA_BP_BA, 0);
1399 ocp_write_word(tp, MCU_TYPE_USB, USB_BP_BA, 0);
1400 }
1401
1402 static void r8152b_enable_eee(struct r8152 *tp)
1403 {
1404 u32 ocp_data;
1405
1406 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_EEE_CR);
1407 ocp_data |= EEE_RX_EN | EEE_TX_EN;
1408 ocp_write_word(tp, MCU_TYPE_PLA, PLA_EEE_CR, ocp_data);
1409 ocp_reg_write(tp, OCP_EEE_CONFIG1, RG_TXLPI_MSK_HFDUP | RG_MATCLR_EN |
1410 EEE_10_CAP | EEE_NWAY_EN |
1411 TX_QUIET_EN | RX_QUIET_EN |
1412 SDRISETIME | RG_RXLPI_MSK_HFDUP |
1413 SDFALLTIME);
1414 ocp_reg_write(tp, OCP_EEE_CONFIG2, RG_LPIHYS_NUM | RG_DACQUIET_EN |
1415 RG_LDVQUIET_EN | RG_CKRSEL |
1416 RG_EEEPRG_EN);
1417 ocp_reg_write(tp, OCP_EEE_CONFIG3, FST_SNR_EYE_R | RG_LFS_SEL | MSK_PH);
1418 ocp_reg_write(tp, OCP_EEE_AR, FUN_ADDR | DEVICE_ADDR);
1419 ocp_reg_write(tp, OCP_EEE_DATA, EEE_ADDR);
1420 ocp_reg_write(tp, OCP_EEE_AR, FUN_DATA | DEVICE_ADDR);
1421 ocp_reg_write(tp, OCP_EEE_DATA, EEE_DATA);
1422 ocp_reg_write(tp, OCP_EEE_AR, 0x0000);
1423 }
1424
1425 static void r8152b_enable_fc(struct r8152 *tp)
1426 {
1427 u16 anar;
1428
1429 anar = r8152_mdio_read(tp, MII_ADVERTISE);
1430 anar |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
1431 r8152_mdio_write(tp, MII_ADVERTISE, anar);
1432 }
1433
1434 static void r8152b_hw_phy_cfg(struct r8152 *tp)
1435 {
1436 r8152_mdio_write(tp, MII_BMCR, BMCR_ANENABLE);
1437 r8152b_disable_aldps(tp);
1438 }
1439
1440 static void r8152b_init(struct r8152 *tp)
1441 {
1442 u32 ocp_data;
1443 int i;
1444
1445 rtl_clear_bp(tp);
1446
1447 if (tp->version == RTL_VER_01) {
1448 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_LED_FEATURE);
1449 ocp_data &= ~LED_MODE_MASK;
1450 ocp_write_word(tp, MCU_TYPE_PLA, PLA_LED_FEATURE, ocp_data);
1451 }
1452
1453 r8152b_hw_phy_cfg(tp);
1454
1455 ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_UPS_CTRL);
1456 ocp_data &= ~POWER_CUT;
1457 ocp_write_word(tp, MCU_TYPE_USB, USB_UPS_CTRL, ocp_data);
1458
1459 ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_PM_CTRL_STATUS);
1460 ocp_data &= ~RWSUME_INDICATE;
1461 ocp_write_word(tp, MCU_TYPE_USB, USB_PM_CTRL_STATUS, ocp_data);
1462
1463 r8152b_exit_oob(tp);
1464
1465 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR);
1466 ocp_data |= TX_10M_IDLE_EN | PFM_PWM_SWITCH;
1467 ocp_write_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR, ocp_data);
1468 ocp_data = ocp_read_dword(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL);
1469 ocp_data &= ~MCU_CLK_RATIO_MASK;
1470 ocp_data |= MCU_CLK_RATIO | D3_CLK_GATED_EN;
1471 ocp_write_dword(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL, ocp_data);
1472 ocp_data = GPHY_STS_MSK | SPEED_DOWN_MSK |
1473 SPDWN_RXDV_MSK | SPDWN_LINKCHG_MSK;
1474 ocp_write_word(tp, MCU_TYPE_PLA, PLA_GPHY_INTR_IMR, ocp_data);
1475
1476 r8152b_enable_eee(tp);
1477 r8152b_enable_aldps(tp);
1478 r8152b_enable_fc(tp);
1479
1480 r8152_mdio_write(tp, MII_BMCR, BMCR_RESET | BMCR_ANENABLE |
1481 BMCR_ANRESTART);
1482 for (i = 0; i < 100; i++) {
1483 udelay(100);
1484 if (!(r8152_mdio_read(tp, MII_BMCR) & BMCR_RESET))
1485 break;
1486 }
1487
1488 /* disable rx aggregation */
1489 ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_USB_CTRL);
1490 ocp_data |= RX_AGG_DISABLE;
1491 ocp_write_word(tp, MCU_TYPE_USB, USB_USB_CTRL, ocp_data);
1492 }
1493
1494 static int rtl8152_suspend(struct usb_interface *intf, pm_message_t message)
1495 {
1496 struct r8152 *tp = usb_get_intfdata(intf);
1497
1498 netif_device_detach(tp->netdev);
1499
1500 if (netif_running(tp->netdev)) {
1501 clear_bit(WORK_ENABLE, &tp->flags);
1502 cancel_delayed_work_sync(&tp->schedule);
1503 }
1504
1505 rtl8152_down(tp);
1506
1507 return 0;
1508 }
1509
1510 static int rtl8152_resume(struct usb_interface *intf)
1511 {
1512 struct r8152 *tp = usb_get_intfdata(intf);
1513
1514 r8152b_init(tp);
1515 netif_device_attach(tp->netdev);
1516 if (netif_running(tp->netdev)) {
1517 rtl8152_enable(tp);
1518 set_bit(WORK_ENABLE, &tp->flags);
1519 set_bit(RTL8152_SET_RX_MODE, &tp->flags);
1520 schedule_delayed_work(&tp->schedule, 0);
1521 }
1522
1523 return 0;
1524 }
1525
1526 static void rtl8152_get_drvinfo(struct net_device *netdev,
1527 struct ethtool_drvinfo *info)
1528 {
1529 struct r8152 *tp = netdev_priv(netdev);
1530
1531 strncpy(info->driver, MODULENAME, ETHTOOL_BUSINFO_LEN);
1532 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
1533 usb_make_path(tp->udev, info->bus_info, sizeof(info->bus_info));
1534 }
1535
1536 static
1537 int rtl8152_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
1538 {
1539 struct r8152 *tp = netdev_priv(netdev);
1540
1541 if (!tp->mii.mdio_read)
1542 return -EOPNOTSUPP;
1543
1544 return mii_ethtool_gset(&tp->mii, cmd);
1545 }
1546
1547 static int rtl8152_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1548 {
1549 struct r8152 *tp = netdev_priv(dev);
1550
1551 return rtl8152_set_speed(tp, cmd->autoneg, cmd->speed, cmd->duplex);
1552 }
1553
1554 static struct ethtool_ops ops = {
1555 .get_drvinfo = rtl8152_get_drvinfo,
1556 .get_settings = rtl8152_get_settings,
1557 .set_settings = rtl8152_set_settings,
1558 .get_link = ethtool_op_get_link,
1559 };
1560
1561 static int rtl8152_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
1562 {
1563 struct r8152 *tp = netdev_priv(netdev);
1564 struct mii_ioctl_data *data = if_mii(rq);
1565 int res = 0;
1566
1567 switch (cmd) {
1568 case SIOCGMIIPHY:
1569 data->phy_id = R8152_PHY_ID; /* Internal PHY */
1570 break;
1571
1572 case SIOCGMIIREG:
1573 data->val_out = r8152_mdio_read(tp, data->reg_num);
1574 break;
1575
1576 case SIOCSMIIREG:
1577 if (!capable(CAP_NET_ADMIN)) {
1578 res = -EPERM;
1579 break;
1580 }
1581 r8152_mdio_write(tp, data->reg_num, data->val_in);
1582 break;
1583
1584 default:
1585 res = -EOPNOTSUPP;
1586 }
1587
1588 return res;
1589 }
1590
1591 static const struct net_device_ops rtl8152_netdev_ops = {
1592 .ndo_open = rtl8152_open,
1593 .ndo_stop = rtl8152_close,
1594 .ndo_do_ioctl = rtl8152_ioctl,
1595 .ndo_start_xmit = rtl8152_start_xmit,
1596 .ndo_tx_timeout = rtl8152_tx_timeout,
1597 .ndo_set_rx_mode = rtl8152_set_rx_mode,
1598 .ndo_set_mac_address = rtl8152_set_mac_address,
1599
1600 .ndo_change_mtu = eth_change_mtu,
1601 .ndo_validate_addr = eth_validate_addr,
1602 };
1603
1604 static void r8152b_get_version(struct r8152 *tp)
1605 {
1606 u32 ocp_data;
1607 u16 version;
1608
1609 ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_TCR1);
1610 version = (u16)(ocp_data & VERSION_MASK);
1611
1612 switch (version) {
1613 case 0x4c00:
1614 tp->version = RTL_VER_01;
1615 break;
1616 case 0x4c10:
1617 tp->version = RTL_VER_02;
1618 break;
1619 default:
1620 netif_info(tp, probe, tp->netdev,
1621 "Unknown version 0x%04x\n", version);
1622 break;
1623 }
1624 }
1625
1626 static int rtl8152_probe(struct usb_interface *intf,
1627 const struct usb_device_id *id)
1628 {
1629 struct usb_device *udev = interface_to_usbdev(intf);
1630 struct r8152 *tp;
1631 struct net_device *netdev;
1632
1633 if (udev->actconfig->desc.bConfigurationValue != 1) {
1634 usb_driver_set_configuration(udev, 1);
1635 return -ENODEV;
1636 }
1637
1638 netdev = alloc_etherdev(sizeof(struct r8152));
1639 if (!netdev) {
1640 dev_err(&intf->dev, "Out of memory");
1641 return -ENOMEM;
1642 }
1643
1644 tp = netdev_priv(netdev);
1645 tp->msg_enable = 0x7FFF;
1646
1647 tasklet_init(&tp->tl, rx_fixup, (unsigned long)tp);
1648 INIT_DELAYED_WORK(&tp->schedule, rtl_work_func_t);
1649
1650 tp->udev = udev;
1651 tp->netdev = netdev;
1652 netdev->netdev_ops = &rtl8152_netdev_ops;
1653 netdev->watchdog_timeo = RTL8152_TX_TIMEOUT;
1654 netdev->features &= ~NETIF_F_IP_CSUM;
1655 SET_ETHTOOL_OPS(netdev, &ops);
1656 tp->speed = 0;
1657
1658 tp->mii.dev = netdev;
1659 tp->mii.mdio_read = read_mii_word;
1660 tp->mii.mdio_write = write_mii_word;
1661 tp->mii.phy_id_mask = 0x3f;
1662 tp->mii.reg_num_mask = 0x1f;
1663 tp->mii.phy_id = R8152_PHY_ID;
1664 tp->mii.supports_gmii = 0;
1665
1666 r8152b_get_version(tp);
1667 r8152b_init(tp);
1668 set_ethernet_addr(tp);
1669
1670 if (!alloc_all_urbs(tp)) {
1671 netif_err(tp, probe, netdev, "out of memory");
1672 goto out;
1673 }
1674
1675 tp->rx_skb = netdev_alloc_skb(netdev,
1676 RTL8152_RMS + sizeof(struct rx_desc));
1677 if (!tp->rx_skb)
1678 goto out1;
1679
1680 usb_set_intfdata(intf, tp);
1681 SET_NETDEV_DEV(netdev, &intf->dev);
1682
1683
1684 if (register_netdev(netdev) != 0) {
1685 netif_err(tp, probe, netdev, "couldn't register the device");
1686 goto out2;
1687 }
1688
1689 netif_info(tp, probe, netdev, "%s", DRIVER_VERSION);
1690
1691 return 0;
1692
1693 out2:
1694 usb_set_intfdata(intf, NULL);
1695 dev_kfree_skb(tp->rx_skb);
1696 out1:
1697 free_all_urbs(tp);
1698 out:
1699 free_netdev(netdev);
1700 return -EIO;
1701 }
1702
1703 static void rtl8152_unload(struct r8152 *tp)
1704 {
1705 u32 ocp_data;
1706
1707 if (tp->version != RTL_VER_01) {
1708 ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_UPS_CTRL);
1709 ocp_data |= POWER_CUT;
1710 ocp_write_word(tp, MCU_TYPE_USB, USB_UPS_CTRL, ocp_data);
1711 }
1712
1713 ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_PM_CTRL_STATUS);
1714 ocp_data &= ~RWSUME_INDICATE;
1715 ocp_write_word(tp, MCU_TYPE_USB, USB_PM_CTRL_STATUS, ocp_data);
1716 }
1717
1718 static void rtl8152_disconnect(struct usb_interface *intf)
1719 {
1720 struct r8152 *tp = usb_get_intfdata(intf);
1721
1722 usb_set_intfdata(intf, NULL);
1723 if (tp) {
1724 set_bit(RTL8152_UNPLUG, &tp->flags);
1725 tasklet_kill(&tp->tl);
1726 unregister_netdev(tp->netdev);
1727 rtl8152_unload(tp);
1728 free_all_urbs(tp);
1729 if (tp->rx_skb)
1730 dev_kfree_skb(tp->rx_skb);
1731 free_netdev(tp->netdev);
1732 }
1733 }
1734
1735 /* table of devices that work with this driver */
1736 static struct usb_device_id rtl8152_table[] = {
1737 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8152)},
1738 {}
1739 };
1740
1741 MODULE_DEVICE_TABLE(usb, rtl8152_table);
1742
1743 static struct usb_driver rtl8152_driver = {
1744 .name = MODULENAME,
1745 .probe = rtl8152_probe,
1746 .disconnect = rtl8152_disconnect,
1747 .id_table = rtl8152_table,
1748 .suspend = rtl8152_suspend,
1749 .resume = rtl8152_resume
1750 };
1751
1752 module_usb_driver(rtl8152_driver);
1753
1754 MODULE_AUTHOR(DRIVER_AUTHOR);
1755 MODULE_DESCRIPTION(DRIVER_DESC);
1756 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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