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Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
[deliverable/linux.git] / drivers / net / ethernet / smsc / smsc911x.c
1 /***************************************************************************
2 *
3 * Copyright (C) 2004-2008 SMSC
4 * Copyright (C) 2005-2008 ARM
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 *
19 ***************************************************************************
20 * Rewritten, heavily based on smsc911x simple driver by SMSC.
21 * Partly uses io macros from smc91x.c by Nicolas Pitre
22 *
23 * Supported devices:
24 * LAN9115, LAN9116, LAN9117, LAN9118
25 * LAN9215, LAN9216, LAN9217, LAN9218
26 * LAN9210, LAN9211
27 * LAN9220, LAN9221
28 * LAN89218
29 *
30 */
31
32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33
34 #include <linux/crc32.h>
35 #include <linux/clk.h>
36 #include <linux/delay.h>
37 #include <linux/errno.h>
38 #include <linux/etherdevice.h>
39 #include <linux/ethtool.h>
40 #include <linux/init.h>
41 #include <linux/interrupt.h>
42 #include <linux/ioport.h>
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/netdevice.h>
46 #include <linux/platform_device.h>
47 #include <linux/regulator/consumer.h>
48 #include <linux/sched.h>
49 #include <linux/timer.h>
50 #include <linux/bug.h>
51 #include <linux/bitops.h>
52 #include <linux/irq.h>
53 #include <linux/io.h>
54 #include <linux/swab.h>
55 #include <linux/phy.h>
56 #include <linux/smsc911x.h>
57 #include <linux/device.h>
58 #include <linux/of.h>
59 #include <linux/of_device.h>
60 #include <linux/of_gpio.h>
61 #include <linux/of_net.h>
62 #include <linux/acpi.h>
63 #include <linux/pm_runtime.h>
64 #include <linux/property.h>
65
66 #include "smsc911x.h"
67
68 #define SMSC_CHIPNAME "smsc911x"
69 #define SMSC_MDIONAME "smsc911x-mdio"
70 #define SMSC_DRV_VERSION "2008-10-21"
71
72 MODULE_LICENSE("GPL");
73 MODULE_VERSION(SMSC_DRV_VERSION);
74 MODULE_ALIAS("platform:smsc911x");
75
76 #if USE_DEBUG > 0
77 static int debug = 16;
78 #else
79 static int debug = 3;
80 #endif
81
82 module_param(debug, int, 0);
83 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
84
85 struct smsc911x_data;
86
87 struct smsc911x_ops {
88 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
89 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
90 void (*rx_readfifo)(struct smsc911x_data *pdata,
91 unsigned int *buf, unsigned int wordcount);
92 void (*tx_writefifo)(struct smsc911x_data *pdata,
93 unsigned int *buf, unsigned int wordcount);
94 };
95
96 #define SMSC911X_NUM_SUPPLIES 2
97
98 struct smsc911x_data {
99 void __iomem *ioaddr;
100
101 unsigned int idrev;
102
103 /* used to decide which workarounds apply */
104 unsigned int generation;
105
106 /* device configuration (copied from platform_data during probe) */
107 struct smsc911x_platform_config config;
108
109 /* This needs to be acquired before calling any of below:
110 * smsc911x_mac_read(), smsc911x_mac_write()
111 */
112 spinlock_t mac_lock;
113
114 /* spinlock to ensure register accesses are serialised */
115 spinlock_t dev_lock;
116
117 struct mii_bus *mii_bus;
118 unsigned int using_extphy;
119 int last_duplex;
120 int last_carrier;
121
122 u32 msg_enable;
123 unsigned int gpio_setting;
124 unsigned int gpio_orig_setting;
125 struct net_device *dev;
126 struct napi_struct napi;
127
128 unsigned int software_irq_signal;
129
130 #ifdef USE_PHY_WORK_AROUND
131 #define MIN_PACKET_SIZE (64)
132 char loopback_tx_pkt[MIN_PACKET_SIZE];
133 char loopback_rx_pkt[MIN_PACKET_SIZE];
134 unsigned int resetcount;
135 #endif
136
137 /* Members for Multicast filter workaround */
138 unsigned int multicast_update_pending;
139 unsigned int set_bits_mask;
140 unsigned int clear_bits_mask;
141 unsigned int hashhi;
142 unsigned int hashlo;
143
144 /* register access functions */
145 const struct smsc911x_ops *ops;
146
147 /* regulators */
148 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
149
150 /* clock */
151 struct clk *clk;
152 };
153
154 /* Easy access to information */
155 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
156
157 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
158 {
159 if (pdata->config.flags & SMSC911X_USE_32BIT)
160 return readl(pdata->ioaddr + reg);
161
162 if (pdata->config.flags & SMSC911X_USE_16BIT)
163 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
164 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
165
166 BUG();
167 return 0;
168 }
169
170 static inline u32
171 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
172 {
173 if (pdata->config.flags & SMSC911X_USE_32BIT)
174 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
175
176 if (pdata->config.flags & SMSC911X_USE_16BIT)
177 return (readw(pdata->ioaddr +
178 __smsc_shift(pdata, reg)) & 0xFFFF) |
179 ((readw(pdata->ioaddr +
180 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
181
182 BUG();
183 return 0;
184 }
185
186 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
187 {
188 u32 data;
189 unsigned long flags;
190
191 spin_lock_irqsave(&pdata->dev_lock, flags);
192 data = pdata->ops->reg_read(pdata, reg);
193 spin_unlock_irqrestore(&pdata->dev_lock, flags);
194
195 return data;
196 }
197
198 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
199 u32 val)
200 {
201 if (pdata->config.flags & SMSC911X_USE_32BIT) {
202 writel(val, pdata->ioaddr + reg);
203 return;
204 }
205
206 if (pdata->config.flags & SMSC911X_USE_16BIT) {
207 writew(val & 0xFFFF, pdata->ioaddr + reg);
208 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
209 return;
210 }
211
212 BUG();
213 }
214
215 static inline void
216 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
217 {
218 if (pdata->config.flags & SMSC911X_USE_32BIT) {
219 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
220 return;
221 }
222
223 if (pdata->config.flags & SMSC911X_USE_16BIT) {
224 writew(val & 0xFFFF,
225 pdata->ioaddr + __smsc_shift(pdata, reg));
226 writew((val >> 16) & 0xFFFF,
227 pdata->ioaddr + __smsc_shift(pdata, reg + 2));
228 return;
229 }
230
231 BUG();
232 }
233
234 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
235 u32 val)
236 {
237 unsigned long flags;
238
239 spin_lock_irqsave(&pdata->dev_lock, flags);
240 pdata->ops->reg_write(pdata, reg, val);
241 spin_unlock_irqrestore(&pdata->dev_lock, flags);
242 }
243
244 /* Writes a packet to the TX_DATA_FIFO */
245 static inline void
246 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
247 unsigned int wordcount)
248 {
249 unsigned long flags;
250
251 spin_lock_irqsave(&pdata->dev_lock, flags);
252
253 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
254 while (wordcount--)
255 __smsc911x_reg_write(pdata, TX_DATA_FIFO,
256 swab32(*buf++));
257 goto out;
258 }
259
260 if (pdata->config.flags & SMSC911X_USE_32BIT) {
261 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
262 goto out;
263 }
264
265 if (pdata->config.flags & SMSC911X_USE_16BIT) {
266 while (wordcount--)
267 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
268 goto out;
269 }
270
271 BUG();
272 out:
273 spin_unlock_irqrestore(&pdata->dev_lock, flags);
274 }
275
276 /* Writes a packet to the TX_DATA_FIFO - shifted version */
277 static inline void
278 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
279 unsigned int wordcount)
280 {
281 unsigned long flags;
282
283 spin_lock_irqsave(&pdata->dev_lock, flags);
284
285 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
286 while (wordcount--)
287 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
288 swab32(*buf++));
289 goto out;
290 }
291
292 if (pdata->config.flags & SMSC911X_USE_32BIT) {
293 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
294 TX_DATA_FIFO), buf, wordcount);
295 goto out;
296 }
297
298 if (pdata->config.flags & SMSC911X_USE_16BIT) {
299 while (wordcount--)
300 __smsc911x_reg_write_shift(pdata,
301 TX_DATA_FIFO, *buf++);
302 goto out;
303 }
304
305 BUG();
306 out:
307 spin_unlock_irqrestore(&pdata->dev_lock, flags);
308 }
309
310 /* Reads a packet out of the RX_DATA_FIFO */
311 static inline void
312 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
313 unsigned int wordcount)
314 {
315 unsigned long flags;
316
317 spin_lock_irqsave(&pdata->dev_lock, flags);
318
319 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
320 while (wordcount--)
321 *buf++ = swab32(__smsc911x_reg_read(pdata,
322 RX_DATA_FIFO));
323 goto out;
324 }
325
326 if (pdata->config.flags & SMSC911X_USE_32BIT) {
327 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
328 goto out;
329 }
330
331 if (pdata->config.flags & SMSC911X_USE_16BIT) {
332 while (wordcount--)
333 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
334 goto out;
335 }
336
337 BUG();
338 out:
339 spin_unlock_irqrestore(&pdata->dev_lock, flags);
340 }
341
342 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
343 static inline void
344 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
345 unsigned int wordcount)
346 {
347 unsigned long flags;
348
349 spin_lock_irqsave(&pdata->dev_lock, flags);
350
351 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
352 while (wordcount--)
353 *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
354 RX_DATA_FIFO));
355 goto out;
356 }
357
358 if (pdata->config.flags & SMSC911X_USE_32BIT) {
359 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
360 RX_DATA_FIFO), buf, wordcount);
361 goto out;
362 }
363
364 if (pdata->config.flags & SMSC911X_USE_16BIT) {
365 while (wordcount--)
366 *buf++ = __smsc911x_reg_read_shift(pdata,
367 RX_DATA_FIFO);
368 goto out;
369 }
370
371 BUG();
372 out:
373 spin_unlock_irqrestore(&pdata->dev_lock, flags);
374 }
375
376 /*
377 * enable regulator and clock resources.
378 */
379 static int smsc911x_enable_resources(struct platform_device *pdev)
380 {
381 struct net_device *ndev = platform_get_drvdata(pdev);
382 struct smsc911x_data *pdata = netdev_priv(ndev);
383 int ret = 0;
384
385 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
386 pdata->supplies);
387 if (ret)
388 netdev_err(ndev, "failed to enable regulators %d\n",
389 ret);
390
391 if (!IS_ERR(pdata->clk)) {
392 ret = clk_prepare_enable(pdata->clk);
393 if (ret < 0)
394 netdev_err(ndev, "failed to enable clock %d\n", ret);
395 }
396
397 return ret;
398 }
399
400 /*
401 * disable resources, currently just regulators.
402 */
403 static int smsc911x_disable_resources(struct platform_device *pdev)
404 {
405 struct net_device *ndev = platform_get_drvdata(pdev);
406 struct smsc911x_data *pdata = netdev_priv(ndev);
407 int ret = 0;
408
409 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
410 pdata->supplies);
411
412 if (!IS_ERR(pdata->clk))
413 clk_disable_unprepare(pdata->clk);
414
415 return ret;
416 }
417
418 /*
419 * Request resources, currently just regulators.
420 *
421 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
422 * these are not always-on we need to request regulators to be turned on
423 * before we can try to access the device registers.
424 */
425 static int smsc911x_request_resources(struct platform_device *pdev)
426 {
427 struct net_device *ndev = platform_get_drvdata(pdev);
428 struct smsc911x_data *pdata = netdev_priv(ndev);
429 int ret = 0;
430
431 /* Request regulators */
432 pdata->supplies[0].supply = "vdd33a";
433 pdata->supplies[1].supply = "vddvario";
434 ret = regulator_bulk_get(&pdev->dev,
435 ARRAY_SIZE(pdata->supplies),
436 pdata->supplies);
437 if (ret)
438 netdev_err(ndev, "couldn't get regulators %d\n",
439 ret);
440
441 /* Request clock */
442 pdata->clk = clk_get(&pdev->dev, NULL);
443 if (IS_ERR(pdata->clk))
444 dev_dbg(&pdev->dev, "couldn't get clock %li\n",
445 PTR_ERR(pdata->clk));
446
447 return ret;
448 }
449
450 /*
451 * Free resources, currently just regulators.
452 *
453 */
454 static void smsc911x_free_resources(struct platform_device *pdev)
455 {
456 struct net_device *ndev = platform_get_drvdata(pdev);
457 struct smsc911x_data *pdata = netdev_priv(ndev);
458
459 /* Free regulators */
460 regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
461 pdata->supplies);
462
463 /* Free clock */
464 if (!IS_ERR(pdata->clk)) {
465 clk_put(pdata->clk);
466 pdata->clk = NULL;
467 }
468 }
469
470 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
471 * and smsc911x_mac_write, so assumes mac_lock is held */
472 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
473 {
474 int i;
475 u32 val;
476
477 SMSC_ASSERT_MAC_LOCK(pdata);
478
479 for (i = 0; i < 40; i++) {
480 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
481 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
482 return 0;
483 }
484 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
485 "MAC_CSR_CMD: 0x%08X", val);
486 return -EIO;
487 }
488
489 /* Fetches a MAC register value. Assumes mac_lock is acquired */
490 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
491 {
492 unsigned int temp;
493
494 SMSC_ASSERT_MAC_LOCK(pdata);
495
496 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
497 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
498 SMSC_WARN(pdata, hw, "MAC busy at entry");
499 return 0xFFFFFFFF;
500 }
501
502 /* Send the MAC cmd */
503 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
504 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
505
506 /* Workaround for hardware read-after-write restriction */
507 temp = smsc911x_reg_read(pdata, BYTE_TEST);
508
509 /* Wait for the read to complete */
510 if (likely(smsc911x_mac_complete(pdata) == 0))
511 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
512
513 SMSC_WARN(pdata, hw, "MAC busy after read");
514 return 0xFFFFFFFF;
515 }
516
517 /* Set a mac register, mac_lock must be acquired before calling */
518 static void smsc911x_mac_write(struct smsc911x_data *pdata,
519 unsigned int offset, u32 val)
520 {
521 unsigned int temp;
522
523 SMSC_ASSERT_MAC_LOCK(pdata);
524
525 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
526 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
527 SMSC_WARN(pdata, hw,
528 "smsc911x_mac_write failed, MAC busy at entry");
529 return;
530 }
531
532 /* Send data to write */
533 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
534
535 /* Write the actual data */
536 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
537 MAC_CSR_CMD_CSR_BUSY_));
538
539 /* Workaround for hardware read-after-write restriction */
540 temp = smsc911x_reg_read(pdata, BYTE_TEST);
541
542 /* Wait for the write to complete */
543 if (likely(smsc911x_mac_complete(pdata) == 0))
544 return;
545
546 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
547 }
548
549 /* Get a phy register */
550 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
551 {
552 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
553 unsigned long flags;
554 unsigned int addr;
555 int i, reg;
556
557 spin_lock_irqsave(&pdata->mac_lock, flags);
558
559 /* Confirm MII not busy */
560 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
561 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
562 reg = -EIO;
563 goto out;
564 }
565
566 /* Set the address, index & direction (read from PHY) */
567 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
568 smsc911x_mac_write(pdata, MII_ACC, addr);
569
570 /* Wait for read to complete w/ timeout */
571 for (i = 0; i < 100; i++)
572 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
573 reg = smsc911x_mac_read(pdata, MII_DATA);
574 goto out;
575 }
576
577 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
578 reg = -EIO;
579
580 out:
581 spin_unlock_irqrestore(&pdata->mac_lock, flags);
582 return reg;
583 }
584
585 /* Set a phy register */
586 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
587 u16 val)
588 {
589 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
590 unsigned long flags;
591 unsigned int addr;
592 int i, reg;
593
594 spin_lock_irqsave(&pdata->mac_lock, flags);
595
596 /* Confirm MII not busy */
597 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
598 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
599 reg = -EIO;
600 goto out;
601 }
602
603 /* Put the data to write in the MAC */
604 smsc911x_mac_write(pdata, MII_DATA, val);
605
606 /* Set the address, index & direction (write to PHY) */
607 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
608 MII_ACC_MII_WRITE_;
609 smsc911x_mac_write(pdata, MII_ACC, addr);
610
611 /* Wait for write to complete w/ timeout */
612 for (i = 0; i < 100; i++)
613 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
614 reg = 0;
615 goto out;
616 }
617
618 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
619 reg = -EIO;
620
621 out:
622 spin_unlock_irqrestore(&pdata->mac_lock, flags);
623 return reg;
624 }
625
626 /* Switch to external phy. Assumes tx and rx are stopped. */
627 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
628 {
629 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
630
631 /* Disable phy clocks to the MAC */
632 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
633 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
634 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
635 udelay(10); /* Enough time for clocks to stop */
636
637 /* Switch to external phy */
638 hwcfg |= HW_CFG_EXT_PHY_EN_;
639 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
640
641 /* Enable phy clocks to the MAC */
642 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
643 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
644 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
645 udelay(10); /* Enough time for clocks to restart */
646
647 hwcfg |= HW_CFG_SMI_SEL_;
648 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
649 }
650
651 /* Autodetects and enables external phy if present on supported chips.
652 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
653 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
654 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
655 {
656 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
657
658 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
659 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
660 pdata->using_extphy = 0;
661 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
662 SMSC_TRACE(pdata, hw, "Forcing external PHY");
663 smsc911x_phy_enable_external(pdata);
664 pdata->using_extphy = 1;
665 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
666 SMSC_TRACE(pdata, hw,
667 "HW_CFG EXT_PHY_DET set, using external PHY");
668 smsc911x_phy_enable_external(pdata);
669 pdata->using_extphy = 1;
670 } else {
671 SMSC_TRACE(pdata, hw,
672 "HW_CFG EXT_PHY_DET clear, using internal PHY");
673 pdata->using_extphy = 0;
674 }
675 }
676
677 /* Fetches a tx status out of the status fifo */
678 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
679 {
680 unsigned int result =
681 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
682
683 if (result != 0)
684 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
685
686 return result;
687 }
688
689 /* Fetches the next rx status */
690 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
691 {
692 unsigned int result =
693 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
694
695 if (result != 0)
696 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
697
698 return result;
699 }
700
701 #ifdef USE_PHY_WORK_AROUND
702 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
703 {
704 unsigned int tries;
705 u32 wrsz;
706 u32 rdsz;
707 ulong bufp;
708
709 for (tries = 0; tries < 10; tries++) {
710 unsigned int txcmd_a;
711 unsigned int txcmd_b;
712 unsigned int status;
713 unsigned int pktlength;
714 unsigned int i;
715
716 /* Zero-out rx packet memory */
717 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
718
719 /* Write tx packet to 118 */
720 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
721 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
722 txcmd_a |= MIN_PACKET_SIZE;
723
724 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
725
726 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
727 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
728
729 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
730 wrsz = MIN_PACKET_SIZE + 3;
731 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
732 wrsz >>= 2;
733
734 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
735
736 /* Wait till transmit is done */
737 i = 60;
738 do {
739 udelay(5);
740 status = smsc911x_tx_get_txstatus(pdata);
741 } while ((i--) && (!status));
742
743 if (!status) {
744 SMSC_WARN(pdata, hw,
745 "Failed to transmit during loopback test");
746 continue;
747 }
748 if (status & TX_STS_ES_) {
749 SMSC_WARN(pdata, hw,
750 "Transmit encountered errors during loopback test");
751 continue;
752 }
753
754 /* Wait till receive is done */
755 i = 60;
756 do {
757 udelay(5);
758 status = smsc911x_rx_get_rxstatus(pdata);
759 } while ((i--) && (!status));
760
761 if (!status) {
762 SMSC_WARN(pdata, hw,
763 "Failed to receive during loopback test");
764 continue;
765 }
766 if (status & RX_STS_ES_) {
767 SMSC_WARN(pdata, hw,
768 "Receive encountered errors during loopback test");
769 continue;
770 }
771
772 pktlength = ((status & 0x3FFF0000UL) >> 16);
773 bufp = (ulong)pdata->loopback_rx_pkt;
774 rdsz = pktlength + 3;
775 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
776 rdsz >>= 2;
777
778 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
779
780 if (pktlength != (MIN_PACKET_SIZE + 4)) {
781 SMSC_WARN(pdata, hw, "Unexpected packet size "
782 "during loop back test, size=%d, will retry",
783 pktlength);
784 } else {
785 unsigned int j;
786 int mismatch = 0;
787 for (j = 0; j < MIN_PACKET_SIZE; j++) {
788 if (pdata->loopback_tx_pkt[j]
789 != pdata->loopback_rx_pkt[j]) {
790 mismatch = 1;
791 break;
792 }
793 }
794 if (!mismatch) {
795 SMSC_TRACE(pdata, hw, "Successfully verified "
796 "loopback packet");
797 return 0;
798 } else {
799 SMSC_WARN(pdata, hw, "Data mismatch "
800 "during loop back test, will retry");
801 }
802 }
803 }
804
805 return -EIO;
806 }
807
808 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
809 {
810 unsigned int temp;
811 unsigned int i = 100000;
812
813 temp = smsc911x_reg_read(pdata, PMT_CTRL);
814 smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_);
815 do {
816 msleep(1);
817 temp = smsc911x_reg_read(pdata, PMT_CTRL);
818 } while ((i--) && (temp & PMT_CTRL_PHY_RST_));
819
820 if (unlikely(temp & PMT_CTRL_PHY_RST_)) {
821 SMSC_WARN(pdata, hw, "PHY reset failed to complete");
822 return -EIO;
823 }
824 /* Extra delay required because the phy may not be completed with
825 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
826 * enough delay but using 1ms here to be safe */
827 msleep(1);
828
829 return 0;
830 }
831
832 static int smsc911x_phy_loopbacktest(struct net_device *dev)
833 {
834 struct smsc911x_data *pdata = netdev_priv(dev);
835 struct phy_device *phy_dev = dev->phydev;
836 int result = -EIO;
837 unsigned int i, val;
838 unsigned long flags;
839
840 /* Initialise tx packet using broadcast destination address */
841 eth_broadcast_addr(pdata->loopback_tx_pkt);
842
843 /* Use incrementing source address */
844 for (i = 6; i < 12; i++)
845 pdata->loopback_tx_pkt[i] = (char)i;
846
847 /* Set length type field */
848 pdata->loopback_tx_pkt[12] = 0x00;
849 pdata->loopback_tx_pkt[13] = 0x00;
850
851 for (i = 14; i < MIN_PACKET_SIZE; i++)
852 pdata->loopback_tx_pkt[i] = (char)i;
853
854 val = smsc911x_reg_read(pdata, HW_CFG);
855 val &= HW_CFG_TX_FIF_SZ_;
856 val |= HW_CFG_SF_;
857 smsc911x_reg_write(pdata, HW_CFG, val);
858
859 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
860 smsc911x_reg_write(pdata, RX_CFG,
861 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
862
863 for (i = 0; i < 10; i++) {
864 /* Set PHY to 10/FD, no ANEG, and loopback mode */
865 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr,
866 MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX);
867
868 /* Enable MAC tx/rx, FD */
869 spin_lock_irqsave(&pdata->mac_lock, flags);
870 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
871 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
872 spin_unlock_irqrestore(&pdata->mac_lock, flags);
873
874 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
875 result = 0;
876 break;
877 }
878 pdata->resetcount++;
879
880 /* Disable MAC rx */
881 spin_lock_irqsave(&pdata->mac_lock, flags);
882 smsc911x_mac_write(pdata, MAC_CR, 0);
883 spin_unlock_irqrestore(&pdata->mac_lock, flags);
884
885 smsc911x_phy_reset(pdata);
886 }
887
888 /* Disable MAC */
889 spin_lock_irqsave(&pdata->mac_lock, flags);
890 smsc911x_mac_write(pdata, MAC_CR, 0);
891 spin_unlock_irqrestore(&pdata->mac_lock, flags);
892
893 /* Cancel PHY loopback mode */
894 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, MII_BMCR, 0);
895
896 smsc911x_reg_write(pdata, TX_CFG, 0);
897 smsc911x_reg_write(pdata, RX_CFG, 0);
898
899 return result;
900 }
901 #endif /* USE_PHY_WORK_AROUND */
902
903 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
904 {
905 struct net_device *ndev = pdata->dev;
906 struct phy_device *phy_dev = ndev->phydev;
907 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
908 u32 flow;
909 unsigned long flags;
910
911 if (phy_dev->duplex == DUPLEX_FULL) {
912 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
913 u16 rmtadv = phy_read(phy_dev, MII_LPA);
914 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
915
916 if (cap & FLOW_CTRL_RX)
917 flow = 0xFFFF0002;
918 else
919 flow = 0;
920
921 if (cap & FLOW_CTRL_TX)
922 afc |= 0xF;
923 else
924 afc &= ~0xF;
925
926 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
927 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
928 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
929 } else {
930 SMSC_TRACE(pdata, hw, "half duplex");
931 flow = 0;
932 afc |= 0xF;
933 }
934
935 spin_lock_irqsave(&pdata->mac_lock, flags);
936 smsc911x_mac_write(pdata, FLOW, flow);
937 spin_unlock_irqrestore(&pdata->mac_lock, flags);
938
939 smsc911x_reg_write(pdata, AFC_CFG, afc);
940 }
941
942 /* Update link mode if anything has changed. Called periodically when the
943 * PHY is in polling mode, even if nothing has changed. */
944 static void smsc911x_phy_adjust_link(struct net_device *dev)
945 {
946 struct smsc911x_data *pdata = netdev_priv(dev);
947 struct phy_device *phy_dev = dev->phydev;
948 unsigned long flags;
949 int carrier;
950
951 if (phy_dev->duplex != pdata->last_duplex) {
952 unsigned int mac_cr;
953 SMSC_TRACE(pdata, hw, "duplex state has changed");
954
955 spin_lock_irqsave(&pdata->mac_lock, flags);
956 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
957 if (phy_dev->duplex) {
958 SMSC_TRACE(pdata, hw,
959 "configuring for full duplex mode");
960 mac_cr |= MAC_CR_FDPX_;
961 } else {
962 SMSC_TRACE(pdata, hw,
963 "configuring for half duplex mode");
964 mac_cr &= ~MAC_CR_FDPX_;
965 }
966 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
967 spin_unlock_irqrestore(&pdata->mac_lock, flags);
968
969 smsc911x_phy_update_flowcontrol(pdata);
970 pdata->last_duplex = phy_dev->duplex;
971 }
972
973 carrier = netif_carrier_ok(dev);
974 if (carrier != pdata->last_carrier) {
975 SMSC_TRACE(pdata, hw, "carrier state has changed");
976 if (carrier) {
977 SMSC_TRACE(pdata, hw, "configuring for carrier OK");
978 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
979 (!pdata->using_extphy)) {
980 /* Restore original GPIO configuration */
981 pdata->gpio_setting = pdata->gpio_orig_setting;
982 smsc911x_reg_write(pdata, GPIO_CFG,
983 pdata->gpio_setting);
984 }
985 } else {
986 SMSC_TRACE(pdata, hw, "configuring for no carrier");
987 /* Check global setting that LED1
988 * usage is 10/100 indicator */
989 pdata->gpio_setting = smsc911x_reg_read(pdata,
990 GPIO_CFG);
991 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
992 (!pdata->using_extphy)) {
993 /* Force 10/100 LED off, after saving
994 * original GPIO configuration */
995 pdata->gpio_orig_setting = pdata->gpio_setting;
996
997 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
998 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
999 | GPIO_CFG_GPIODIR0_
1000 | GPIO_CFG_GPIOD0_);
1001 smsc911x_reg_write(pdata, GPIO_CFG,
1002 pdata->gpio_setting);
1003 }
1004 }
1005 pdata->last_carrier = carrier;
1006 }
1007 }
1008
1009 static int smsc911x_mii_probe(struct net_device *dev)
1010 {
1011 struct smsc911x_data *pdata = netdev_priv(dev);
1012 struct phy_device *phydev = NULL;
1013 int ret;
1014
1015 /* find the first phy */
1016 phydev = phy_find_first(pdata->mii_bus);
1017 if (!phydev) {
1018 netdev_err(dev, "no PHY found\n");
1019 return -ENODEV;
1020 }
1021
1022 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1023 phydev->mdio.addr, phydev->phy_id);
1024
1025 ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1026 pdata->config.phy_interface);
1027
1028 if (ret) {
1029 netdev_err(dev, "Could not attach to PHY\n");
1030 return ret;
1031 }
1032
1033 phy_attached_info(phydev);
1034
1035 /* mask with MAC supported features */
1036 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
1037 SUPPORTED_Asym_Pause);
1038 phydev->advertising = phydev->supported;
1039
1040 pdata->last_duplex = -1;
1041 pdata->last_carrier = -1;
1042
1043 #ifdef USE_PHY_WORK_AROUND
1044 if (smsc911x_phy_loopbacktest(dev) < 0) {
1045 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1046 phy_disconnect(phydev);
1047 return -ENODEV;
1048 }
1049 SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1050 #endif /* USE_PHY_WORK_AROUND */
1051
1052 SMSC_TRACE(pdata, hw, "phy initialised successfully");
1053 return 0;
1054 }
1055
1056 static int smsc911x_mii_init(struct platform_device *pdev,
1057 struct net_device *dev)
1058 {
1059 struct smsc911x_data *pdata = netdev_priv(dev);
1060 int err = -ENXIO;
1061
1062 pdata->mii_bus = mdiobus_alloc();
1063 if (!pdata->mii_bus) {
1064 err = -ENOMEM;
1065 goto err_out_1;
1066 }
1067
1068 pdata->mii_bus->name = SMSC_MDIONAME;
1069 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1070 pdev->name, pdev->id);
1071 pdata->mii_bus->priv = pdata;
1072 pdata->mii_bus->read = smsc911x_mii_read;
1073 pdata->mii_bus->write = smsc911x_mii_write;
1074
1075 pdata->mii_bus->parent = &pdev->dev;
1076
1077 switch (pdata->idrev & 0xFFFF0000) {
1078 case 0x01170000:
1079 case 0x01150000:
1080 case 0x117A0000:
1081 case 0x115A0000:
1082 /* External PHY supported, try to autodetect */
1083 smsc911x_phy_initialise_external(pdata);
1084 break;
1085 default:
1086 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1087 "using internal PHY");
1088 pdata->using_extphy = 0;
1089 break;
1090 }
1091
1092 if (!pdata->using_extphy) {
1093 /* Mask all PHYs except ID 1 (internal) */
1094 pdata->mii_bus->phy_mask = ~(1 << 1);
1095 }
1096
1097 if (mdiobus_register(pdata->mii_bus)) {
1098 SMSC_WARN(pdata, probe, "Error registering mii bus");
1099 goto err_out_free_bus_2;
1100 }
1101
1102 return 0;
1103
1104 err_out_free_bus_2:
1105 mdiobus_free(pdata->mii_bus);
1106 err_out_1:
1107 return err;
1108 }
1109
1110 /* Gets the number of tx statuses in the fifo */
1111 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1112 {
1113 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1114 & TX_FIFO_INF_TSUSED_) >> 16;
1115 }
1116
1117 /* Reads tx statuses and increments counters where necessary */
1118 static void smsc911x_tx_update_txcounters(struct net_device *dev)
1119 {
1120 struct smsc911x_data *pdata = netdev_priv(dev);
1121 unsigned int tx_stat;
1122
1123 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1124 if (unlikely(tx_stat & 0x80000000)) {
1125 /* In this driver the packet tag is used as the packet
1126 * length. Since a packet length can never reach the
1127 * size of 0x8000, this bit is reserved. It is worth
1128 * noting that the "reserved bit" in the warning above
1129 * does not reference a hardware defined reserved bit
1130 * but rather a driver defined one.
1131 */
1132 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1133 } else {
1134 if (unlikely(tx_stat & TX_STS_ES_)) {
1135 dev->stats.tx_errors++;
1136 } else {
1137 dev->stats.tx_packets++;
1138 dev->stats.tx_bytes += (tx_stat >> 16);
1139 }
1140 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1141 dev->stats.collisions += 16;
1142 dev->stats.tx_aborted_errors += 1;
1143 } else {
1144 dev->stats.collisions +=
1145 ((tx_stat >> 3) & 0xF);
1146 }
1147 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1148 dev->stats.tx_carrier_errors += 1;
1149 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1150 dev->stats.collisions++;
1151 dev->stats.tx_aborted_errors++;
1152 }
1153 }
1154 }
1155 }
1156
1157 /* Increments the Rx error counters */
1158 static void
1159 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1160 {
1161 int crc_err = 0;
1162
1163 if (unlikely(rxstat & RX_STS_ES_)) {
1164 dev->stats.rx_errors++;
1165 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1166 dev->stats.rx_crc_errors++;
1167 crc_err = 1;
1168 }
1169 }
1170 if (likely(!crc_err)) {
1171 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1172 (rxstat & RX_STS_LENGTH_ERR_)))
1173 dev->stats.rx_length_errors++;
1174 if (rxstat & RX_STS_MCAST_)
1175 dev->stats.multicast++;
1176 }
1177 }
1178
1179 /* Quickly dumps bad packets */
1180 static void
1181 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1182 {
1183 if (likely(pktwords >= 4)) {
1184 unsigned int timeout = 500;
1185 unsigned int val;
1186 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1187 do {
1188 udelay(1);
1189 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1190 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1191
1192 if (unlikely(timeout == 0))
1193 SMSC_WARN(pdata, hw, "Timed out waiting for "
1194 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1195 } else {
1196 unsigned int temp;
1197 while (pktwords--)
1198 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
1199 }
1200 }
1201
1202 /* NAPI poll function */
1203 static int smsc911x_poll(struct napi_struct *napi, int budget)
1204 {
1205 struct smsc911x_data *pdata =
1206 container_of(napi, struct smsc911x_data, napi);
1207 struct net_device *dev = pdata->dev;
1208 int npackets = 0;
1209
1210 while (npackets < budget) {
1211 unsigned int pktlength;
1212 unsigned int pktwords;
1213 struct sk_buff *skb;
1214 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1215
1216 if (!rxstat) {
1217 unsigned int temp;
1218 /* We processed all packets available. Tell NAPI it can
1219 * stop polling then re-enable rx interrupts */
1220 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1221 napi_complete(napi);
1222 temp = smsc911x_reg_read(pdata, INT_EN);
1223 temp |= INT_EN_RSFL_EN_;
1224 smsc911x_reg_write(pdata, INT_EN, temp);
1225 break;
1226 }
1227
1228 /* Count packet for NAPI scheduling, even if it has an error.
1229 * Error packets still require cycles to discard */
1230 npackets++;
1231
1232 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1233 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1234 smsc911x_rx_counterrors(dev, rxstat);
1235
1236 if (unlikely(rxstat & RX_STS_ES_)) {
1237 SMSC_WARN(pdata, rx_err,
1238 "Discarding packet with error bit set");
1239 /* Packet has an error, discard it and continue with
1240 * the next */
1241 smsc911x_rx_fastforward(pdata, pktwords);
1242 dev->stats.rx_dropped++;
1243 continue;
1244 }
1245
1246 skb = netdev_alloc_skb(dev, pktwords << 2);
1247 if (unlikely(!skb)) {
1248 SMSC_WARN(pdata, rx_err,
1249 "Unable to allocate skb for rx packet");
1250 /* Drop the packet and stop this polling iteration */
1251 smsc911x_rx_fastforward(pdata, pktwords);
1252 dev->stats.rx_dropped++;
1253 break;
1254 }
1255
1256 pdata->ops->rx_readfifo(pdata,
1257 (unsigned int *)skb->data, pktwords);
1258
1259 /* Align IP on 16B boundary */
1260 skb_reserve(skb, NET_IP_ALIGN);
1261 skb_put(skb, pktlength - 4);
1262 skb->protocol = eth_type_trans(skb, dev);
1263 skb_checksum_none_assert(skb);
1264 netif_receive_skb(skb);
1265
1266 /* Update counters */
1267 dev->stats.rx_packets++;
1268 dev->stats.rx_bytes += (pktlength - 4);
1269 }
1270
1271 /* Return total received packets */
1272 return npackets;
1273 }
1274
1275 /* Returns hash bit number for given MAC address
1276 * Example:
1277 * 01 00 5E 00 00 01 -> returns bit number 31 */
1278 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1279 {
1280 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1281 }
1282
1283 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1284 {
1285 /* Performs the multicast & mac_cr update. This is called when
1286 * safe on the current hardware, and with the mac_lock held */
1287 unsigned int mac_cr;
1288
1289 SMSC_ASSERT_MAC_LOCK(pdata);
1290
1291 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1292 mac_cr |= pdata->set_bits_mask;
1293 mac_cr &= ~(pdata->clear_bits_mask);
1294 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1295 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1296 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1297 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1298 mac_cr, pdata->hashhi, pdata->hashlo);
1299 }
1300
1301 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1302 {
1303 unsigned int mac_cr;
1304
1305 /* This function is only called for older LAN911x devices
1306 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1307 * be modified during Rx - newer devices immediately update the
1308 * registers.
1309 *
1310 * This is called from interrupt context */
1311
1312 spin_lock(&pdata->mac_lock);
1313
1314 /* Check Rx has stopped */
1315 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1316 SMSC_WARN(pdata, drv, "Rx not stopped");
1317
1318 /* Perform the update - safe to do now Rx has stopped */
1319 smsc911x_rx_multicast_update(pdata);
1320
1321 /* Re-enable Rx */
1322 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1323 mac_cr |= MAC_CR_RXEN_;
1324 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1325
1326 pdata->multicast_update_pending = 0;
1327
1328 spin_unlock(&pdata->mac_lock);
1329 }
1330
1331 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1332 {
1333 struct net_device *ndev = pdata->dev;
1334 struct phy_device *phy_dev = ndev->phydev;
1335 int rc = 0;
1336
1337 if (!phy_dev)
1338 return rc;
1339
1340 /* If the internal PHY is in General Power-Down mode, all, except the
1341 * management interface, is powered-down and stays in that condition as
1342 * long as Phy register bit 0.11 is HIGH.
1343 *
1344 * In that case, clear the bit 0.11, so the PHY powers up and we can
1345 * access to the phy registers.
1346 */
1347 rc = phy_read(phy_dev, MII_BMCR);
1348 if (rc < 0) {
1349 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1350 return rc;
1351 }
1352
1353 /* If the PHY general power-down bit is not set is not necessary to
1354 * disable the general power down-mode.
1355 */
1356 if (rc & BMCR_PDOWN) {
1357 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1358 if (rc < 0) {
1359 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1360 return rc;
1361 }
1362
1363 usleep_range(1000, 1500);
1364 }
1365
1366 return 0;
1367 }
1368
1369 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1370 {
1371 struct net_device *ndev = pdata->dev;
1372 struct phy_device *phy_dev = ndev->phydev;
1373 int rc = 0;
1374
1375 if (!phy_dev)
1376 return rc;
1377
1378 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1379
1380 if (rc < 0) {
1381 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1382 return rc;
1383 }
1384
1385 /* Only disable if energy detect mode is already enabled */
1386 if (rc & MII_LAN83C185_EDPWRDOWN) {
1387 /* Disable energy detect mode for this SMSC Transceivers */
1388 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1389 rc & (~MII_LAN83C185_EDPWRDOWN));
1390
1391 if (rc < 0) {
1392 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1393 return rc;
1394 }
1395 /* Allow PHY to wakeup */
1396 mdelay(2);
1397 }
1398
1399 return 0;
1400 }
1401
1402 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1403 {
1404 struct net_device *ndev = pdata->dev;
1405 struct phy_device *phy_dev = ndev->phydev;
1406 int rc = 0;
1407
1408 if (!phy_dev)
1409 return rc;
1410
1411 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1412
1413 if (rc < 0) {
1414 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1415 return rc;
1416 }
1417
1418 /* Only enable if energy detect mode is already disabled */
1419 if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1420 /* Enable energy detect mode for this SMSC Transceivers */
1421 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1422 rc | MII_LAN83C185_EDPWRDOWN);
1423
1424 if (rc < 0) {
1425 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1426 return rc;
1427 }
1428 }
1429 return 0;
1430 }
1431
1432 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1433 {
1434 unsigned int timeout;
1435 unsigned int temp;
1436 int ret;
1437
1438 /*
1439 * Make sure to power-up the PHY chip before doing a reset, otherwise
1440 * the reset fails.
1441 */
1442 ret = smsc911x_phy_general_power_up(pdata);
1443 if (ret) {
1444 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1445 return ret;
1446 }
1447
1448 /*
1449 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1450 * are initialized in a Energy Detect Power-Down mode that prevents
1451 * the MAC chip to be software reseted. So we have to wakeup the PHY
1452 * before.
1453 */
1454 if (pdata->generation == 4) {
1455 ret = smsc911x_phy_disable_energy_detect(pdata);
1456
1457 if (ret) {
1458 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1459 return ret;
1460 }
1461 }
1462
1463 /* Reset the LAN911x */
1464 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1465 timeout = 10;
1466 do {
1467 udelay(10);
1468 temp = smsc911x_reg_read(pdata, HW_CFG);
1469 } while ((--timeout) && (temp & HW_CFG_SRST_));
1470
1471 if (unlikely(temp & HW_CFG_SRST_)) {
1472 SMSC_WARN(pdata, drv, "Failed to complete reset");
1473 return -EIO;
1474 }
1475
1476 if (pdata->generation == 4) {
1477 ret = smsc911x_phy_enable_energy_detect(pdata);
1478
1479 if (ret) {
1480 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1481 return ret;
1482 }
1483 }
1484
1485 return 0;
1486 }
1487
1488 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1489 static void
1490 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1491 {
1492 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1493 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1494 (dev_addr[1] << 8) | dev_addr[0];
1495
1496 SMSC_ASSERT_MAC_LOCK(pdata);
1497
1498 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1499 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1500 }
1501
1502 static void smsc911x_disable_irq_chip(struct net_device *dev)
1503 {
1504 struct smsc911x_data *pdata = netdev_priv(dev);
1505
1506 smsc911x_reg_write(pdata, INT_EN, 0);
1507 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1508 }
1509
1510 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1511 {
1512 struct net_device *dev = dev_id;
1513 struct smsc911x_data *pdata = netdev_priv(dev);
1514 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1515 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1516 int serviced = IRQ_NONE;
1517 u32 temp;
1518
1519 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1520 temp = smsc911x_reg_read(pdata, INT_EN);
1521 temp &= (~INT_EN_SW_INT_EN_);
1522 smsc911x_reg_write(pdata, INT_EN, temp);
1523 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1524 pdata->software_irq_signal = 1;
1525 smp_wmb();
1526 serviced = IRQ_HANDLED;
1527 }
1528
1529 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1530 /* Called when there is a multicast update scheduled and
1531 * it is now safe to complete the update */
1532 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1533 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1534 if (pdata->multicast_update_pending)
1535 smsc911x_rx_multicast_update_workaround(pdata);
1536 serviced = IRQ_HANDLED;
1537 }
1538
1539 if (intsts & inten & INT_STS_TDFA_) {
1540 temp = smsc911x_reg_read(pdata, FIFO_INT);
1541 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1542 smsc911x_reg_write(pdata, FIFO_INT, temp);
1543 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1544 netif_wake_queue(dev);
1545 serviced = IRQ_HANDLED;
1546 }
1547
1548 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1549 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1550 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1551 serviced = IRQ_HANDLED;
1552 }
1553
1554 if (likely(intsts & inten & INT_STS_RSFL_)) {
1555 if (likely(napi_schedule_prep(&pdata->napi))) {
1556 /* Disable Rx interrupts */
1557 temp = smsc911x_reg_read(pdata, INT_EN);
1558 temp &= (~INT_EN_RSFL_EN_);
1559 smsc911x_reg_write(pdata, INT_EN, temp);
1560 /* Schedule a NAPI poll */
1561 __napi_schedule(&pdata->napi);
1562 } else {
1563 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1564 }
1565 serviced = IRQ_HANDLED;
1566 }
1567
1568 return serviced;
1569 }
1570
1571 static int smsc911x_open(struct net_device *dev)
1572 {
1573 struct smsc911x_data *pdata = netdev_priv(dev);
1574 unsigned int timeout;
1575 unsigned int temp;
1576 unsigned int intcfg;
1577 int retval;
1578 int irq_flags;
1579
1580 /* find and start the given phy */
1581 if (!dev->phydev) {
1582 retval = smsc911x_mii_probe(dev);
1583 if (retval < 0) {
1584 SMSC_WARN(pdata, probe, "Error starting phy");
1585 goto out;
1586 }
1587 }
1588
1589 /* Reset the LAN911x */
1590 retval = smsc911x_soft_reset(pdata);
1591 if (retval) {
1592 SMSC_WARN(pdata, hw, "soft reset failed");
1593 goto mii_free_out;
1594 }
1595
1596 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1597 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1598
1599 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1600 spin_lock_irq(&pdata->mac_lock);
1601 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1602 spin_unlock_irq(&pdata->mac_lock);
1603
1604 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1605 timeout = 50;
1606 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1607 --timeout) {
1608 udelay(10);
1609 }
1610
1611 if (unlikely(timeout == 0))
1612 SMSC_WARN(pdata, ifup,
1613 "Timed out waiting for EEPROM busy bit to clear");
1614
1615 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1616
1617 /* The soft reset above cleared the device's MAC address,
1618 * restore it from local copy (set in probe) */
1619 spin_lock_irq(&pdata->mac_lock);
1620 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1621 spin_unlock_irq(&pdata->mac_lock);
1622
1623 /* Initialise irqs, but leave all sources disabled */
1624 smsc911x_disable_irq_chip(dev);
1625
1626 /* Set interrupt deassertion to 100uS */
1627 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1628
1629 if (pdata->config.irq_polarity) {
1630 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1631 intcfg |= INT_CFG_IRQ_POL_;
1632 } else {
1633 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1634 }
1635
1636 if (pdata->config.irq_type) {
1637 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1638 intcfg |= INT_CFG_IRQ_TYPE_;
1639 } else {
1640 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1641 }
1642
1643 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1644
1645 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1646 pdata->software_irq_signal = 0;
1647 smp_wmb();
1648
1649 irq_flags = irq_get_trigger_type(dev->irq);
1650 retval = request_irq(dev->irq, smsc911x_irqhandler,
1651 irq_flags | IRQF_SHARED, dev->name, dev);
1652 if (retval) {
1653 SMSC_WARN(pdata, probe,
1654 "Unable to claim requested irq: %d", dev->irq);
1655 goto mii_free_out;
1656 }
1657
1658 temp = smsc911x_reg_read(pdata, INT_EN);
1659 temp |= INT_EN_SW_INT_EN_;
1660 smsc911x_reg_write(pdata, INT_EN, temp);
1661
1662 timeout = 1000;
1663 while (timeout--) {
1664 if (pdata->software_irq_signal)
1665 break;
1666 msleep(1);
1667 }
1668
1669 if (!pdata->software_irq_signal) {
1670 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1671 dev->irq);
1672 retval = -ENODEV;
1673 goto irq_stop_out;
1674 }
1675 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1676 dev->irq);
1677
1678 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1679 (unsigned long)pdata->ioaddr, dev->irq);
1680
1681 /* Reset the last known duplex and carrier */
1682 pdata->last_duplex = -1;
1683 pdata->last_carrier = -1;
1684
1685 /* Bring the PHY up */
1686 phy_start(dev->phydev);
1687
1688 temp = smsc911x_reg_read(pdata, HW_CFG);
1689 /* Preserve TX FIFO size and external PHY configuration */
1690 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1691 temp |= HW_CFG_SF_;
1692 smsc911x_reg_write(pdata, HW_CFG, temp);
1693
1694 temp = smsc911x_reg_read(pdata, FIFO_INT);
1695 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1696 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1697 smsc911x_reg_write(pdata, FIFO_INT, temp);
1698
1699 /* set RX Data offset to 2 bytes for alignment */
1700 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1701
1702 /* enable NAPI polling before enabling RX interrupts */
1703 napi_enable(&pdata->napi);
1704
1705 temp = smsc911x_reg_read(pdata, INT_EN);
1706 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1707 smsc911x_reg_write(pdata, INT_EN, temp);
1708
1709 spin_lock_irq(&pdata->mac_lock);
1710 temp = smsc911x_mac_read(pdata, MAC_CR);
1711 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1712 smsc911x_mac_write(pdata, MAC_CR, temp);
1713 spin_unlock_irq(&pdata->mac_lock);
1714
1715 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1716
1717 netif_start_queue(dev);
1718 return 0;
1719
1720 irq_stop_out:
1721 free_irq(dev->irq, dev);
1722 mii_free_out:
1723 phy_disconnect(dev->phydev);
1724 dev->phydev = NULL;
1725 out:
1726 return retval;
1727 }
1728
1729 /* Entry point for stopping the interface */
1730 static int smsc911x_stop(struct net_device *dev)
1731 {
1732 struct smsc911x_data *pdata = netdev_priv(dev);
1733 unsigned int temp;
1734
1735 /* Disable all device interrupts */
1736 temp = smsc911x_reg_read(pdata, INT_CFG);
1737 temp &= ~INT_CFG_IRQ_EN_;
1738 smsc911x_reg_write(pdata, INT_CFG, temp);
1739
1740 /* Stop Tx and Rx polling */
1741 netif_stop_queue(dev);
1742 napi_disable(&pdata->napi);
1743
1744 /* At this point all Rx and Tx activity is stopped */
1745 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1746 smsc911x_tx_update_txcounters(dev);
1747
1748 free_irq(dev->irq, dev);
1749
1750 /* Bring the PHY down */
1751 if (dev->phydev) {
1752 phy_stop(dev->phydev);
1753 phy_disconnect(dev->phydev);
1754 dev->phydev = NULL;
1755 }
1756 netif_carrier_off(dev);
1757
1758 SMSC_TRACE(pdata, ifdown, "Interface stopped");
1759 return 0;
1760 }
1761
1762 /* Entry point for transmitting a packet */
1763 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1764 {
1765 struct smsc911x_data *pdata = netdev_priv(dev);
1766 unsigned int freespace;
1767 unsigned int tx_cmd_a;
1768 unsigned int tx_cmd_b;
1769 unsigned int temp;
1770 u32 wrsz;
1771 ulong bufp;
1772
1773 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1774
1775 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1776 SMSC_WARN(pdata, tx_err,
1777 "Tx data fifo low, space available: %d", freespace);
1778
1779 /* Word alignment adjustment */
1780 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1781 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1782 tx_cmd_a |= (unsigned int)skb->len;
1783
1784 tx_cmd_b = ((unsigned int)skb->len) << 16;
1785 tx_cmd_b |= (unsigned int)skb->len;
1786
1787 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1788 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1789
1790 bufp = (ulong)skb->data & (~0x3);
1791 wrsz = (u32)skb->len + 3;
1792 wrsz += (u32)((ulong)skb->data & 0x3);
1793 wrsz >>= 2;
1794
1795 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1796 freespace -= (skb->len + 32);
1797 skb_tx_timestamp(skb);
1798 dev_consume_skb_any(skb);
1799
1800 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1801 smsc911x_tx_update_txcounters(dev);
1802
1803 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1804 netif_stop_queue(dev);
1805 temp = smsc911x_reg_read(pdata, FIFO_INT);
1806 temp &= 0x00FFFFFF;
1807 temp |= 0x32000000;
1808 smsc911x_reg_write(pdata, FIFO_INT, temp);
1809 }
1810
1811 return NETDEV_TX_OK;
1812 }
1813
1814 /* Entry point for getting status counters */
1815 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1816 {
1817 struct smsc911x_data *pdata = netdev_priv(dev);
1818 smsc911x_tx_update_txcounters(dev);
1819 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1820 return &dev->stats;
1821 }
1822
1823 /* Entry point for setting addressing modes */
1824 static void smsc911x_set_multicast_list(struct net_device *dev)
1825 {
1826 struct smsc911x_data *pdata = netdev_priv(dev);
1827 unsigned long flags;
1828
1829 if (dev->flags & IFF_PROMISC) {
1830 /* Enabling promiscuous mode */
1831 pdata->set_bits_mask = MAC_CR_PRMS_;
1832 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1833 pdata->hashhi = 0;
1834 pdata->hashlo = 0;
1835 } else if (dev->flags & IFF_ALLMULTI) {
1836 /* Enabling all multicast mode */
1837 pdata->set_bits_mask = MAC_CR_MCPAS_;
1838 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1839 pdata->hashhi = 0;
1840 pdata->hashlo = 0;
1841 } else if (!netdev_mc_empty(dev)) {
1842 /* Enabling specific multicast addresses */
1843 unsigned int hash_high = 0;
1844 unsigned int hash_low = 0;
1845 struct netdev_hw_addr *ha;
1846
1847 pdata->set_bits_mask = MAC_CR_HPFILT_;
1848 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1849
1850 netdev_for_each_mc_addr(ha, dev) {
1851 unsigned int bitnum = smsc911x_hash(ha->addr);
1852 unsigned int mask = 0x01 << (bitnum & 0x1F);
1853
1854 if (bitnum & 0x20)
1855 hash_high |= mask;
1856 else
1857 hash_low |= mask;
1858 }
1859
1860 pdata->hashhi = hash_high;
1861 pdata->hashlo = hash_low;
1862 } else {
1863 /* Enabling local MAC address only */
1864 pdata->set_bits_mask = 0;
1865 pdata->clear_bits_mask =
1866 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1867 pdata->hashhi = 0;
1868 pdata->hashlo = 0;
1869 }
1870
1871 spin_lock_irqsave(&pdata->mac_lock, flags);
1872
1873 if (pdata->generation <= 1) {
1874 /* Older hardware revision - cannot change these flags while
1875 * receiving data */
1876 if (!pdata->multicast_update_pending) {
1877 unsigned int temp;
1878 SMSC_TRACE(pdata, hw, "scheduling mcast update");
1879 pdata->multicast_update_pending = 1;
1880
1881 /* Request the hardware to stop, then perform the
1882 * update when we get an RX_STOP interrupt */
1883 temp = smsc911x_mac_read(pdata, MAC_CR);
1884 temp &= ~(MAC_CR_RXEN_);
1885 smsc911x_mac_write(pdata, MAC_CR, temp);
1886 } else {
1887 /* There is another update pending, this should now
1888 * use the newer values */
1889 }
1890 } else {
1891 /* Newer hardware revision - can write immediately */
1892 smsc911x_rx_multicast_update(pdata);
1893 }
1894
1895 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1896 }
1897
1898 #ifdef CONFIG_NET_POLL_CONTROLLER
1899 static void smsc911x_poll_controller(struct net_device *dev)
1900 {
1901 disable_irq(dev->irq);
1902 smsc911x_irqhandler(0, dev);
1903 enable_irq(dev->irq);
1904 }
1905 #endif /* CONFIG_NET_POLL_CONTROLLER */
1906
1907 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1908 {
1909 struct smsc911x_data *pdata = netdev_priv(dev);
1910 struct sockaddr *addr = p;
1911
1912 /* On older hardware revisions we cannot change the mac address
1913 * registers while receiving data. Newer devices can safely change
1914 * this at any time. */
1915 if (pdata->generation <= 1 && netif_running(dev))
1916 return -EBUSY;
1917
1918 if (!is_valid_ether_addr(addr->sa_data))
1919 return -EADDRNOTAVAIL;
1920
1921 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1922
1923 spin_lock_irq(&pdata->mac_lock);
1924 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1925 spin_unlock_irq(&pdata->mac_lock);
1926
1927 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1928
1929 return 0;
1930 }
1931
1932 /* Standard ioctls for mii-tool */
1933 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1934 {
1935 if (!netif_running(dev) || !dev->phydev)
1936 return -EINVAL;
1937
1938 return phy_mii_ioctl(dev->phydev, ifr, cmd);
1939 }
1940
1941 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1942 struct ethtool_drvinfo *info)
1943 {
1944 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1945 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1946 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1947 sizeof(info->bus_info));
1948 }
1949
1950 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1951 {
1952 return phy_start_aneg(dev->phydev);
1953 }
1954
1955 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1956 {
1957 struct smsc911x_data *pdata = netdev_priv(dev);
1958 return pdata->msg_enable;
1959 }
1960
1961 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1962 {
1963 struct smsc911x_data *pdata = netdev_priv(dev);
1964 pdata->msg_enable = level;
1965 }
1966
1967 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1968 {
1969 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1970 sizeof(u32);
1971 }
1972
1973 static void
1974 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1975 void *buf)
1976 {
1977 struct smsc911x_data *pdata = netdev_priv(dev);
1978 struct phy_device *phy_dev = dev->phydev;
1979 unsigned long flags;
1980 unsigned int i;
1981 unsigned int j = 0;
1982 u32 *data = buf;
1983
1984 regs->version = pdata->idrev;
1985 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1986 data[j++] = smsc911x_reg_read(pdata, i);
1987
1988 for (i = MAC_CR; i <= WUCSR; i++) {
1989 spin_lock_irqsave(&pdata->mac_lock, flags);
1990 data[j++] = smsc911x_mac_read(pdata, i);
1991 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1992 }
1993
1994 for (i = 0; i <= 31; i++)
1995 data[j++] = smsc911x_mii_read(phy_dev->mdio.bus,
1996 phy_dev->mdio.addr, i);
1997 }
1998
1999 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
2000 {
2001 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2002 temp &= ~GPIO_CFG_EEPR_EN_;
2003 smsc911x_reg_write(pdata, GPIO_CFG, temp);
2004 msleep(1);
2005 }
2006
2007 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2008 {
2009 int timeout = 100;
2010 u32 e2cmd;
2011
2012 SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2013 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2014 SMSC_WARN(pdata, drv, "Busy at start");
2015 return -EBUSY;
2016 }
2017
2018 e2cmd = op | E2P_CMD_EPC_BUSY_;
2019 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2020
2021 do {
2022 msleep(1);
2023 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2024 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2025
2026 if (!timeout) {
2027 SMSC_TRACE(pdata, drv, "TIMED OUT");
2028 return -EAGAIN;
2029 }
2030
2031 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2032 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2033 return -EINVAL;
2034 }
2035
2036 return 0;
2037 }
2038
2039 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2040 u8 address, u8 *data)
2041 {
2042 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2043 int ret;
2044
2045 SMSC_TRACE(pdata, drv, "address 0x%x", address);
2046 ret = smsc911x_eeprom_send_cmd(pdata, op);
2047
2048 if (!ret)
2049 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2050
2051 return ret;
2052 }
2053
2054 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2055 u8 address, u8 data)
2056 {
2057 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2058 u32 temp;
2059 int ret;
2060
2061 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2062 ret = smsc911x_eeprom_send_cmd(pdata, op);
2063
2064 if (!ret) {
2065 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2066 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2067
2068 /* Workaround for hardware read-after-write restriction */
2069 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2070
2071 ret = smsc911x_eeprom_send_cmd(pdata, op);
2072 }
2073
2074 return ret;
2075 }
2076
2077 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2078 {
2079 return SMSC911X_EEPROM_SIZE;
2080 }
2081
2082 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2083 struct ethtool_eeprom *eeprom, u8 *data)
2084 {
2085 struct smsc911x_data *pdata = netdev_priv(dev);
2086 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2087 int len;
2088 int i;
2089
2090 smsc911x_eeprom_enable_access(pdata);
2091
2092 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2093 for (i = 0; i < len; i++) {
2094 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2095 if (ret < 0) {
2096 eeprom->len = 0;
2097 return ret;
2098 }
2099 }
2100
2101 memcpy(data, &eeprom_data[eeprom->offset], len);
2102 eeprom->len = len;
2103 return 0;
2104 }
2105
2106 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2107 struct ethtool_eeprom *eeprom, u8 *data)
2108 {
2109 int ret;
2110 struct smsc911x_data *pdata = netdev_priv(dev);
2111
2112 smsc911x_eeprom_enable_access(pdata);
2113 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2114 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2115 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2116
2117 /* Single byte write, according to man page */
2118 eeprom->len = 1;
2119
2120 return ret;
2121 }
2122
2123 static const struct ethtool_ops smsc911x_ethtool_ops = {
2124 .get_link = ethtool_op_get_link,
2125 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2126 .nway_reset = smsc911x_ethtool_nwayreset,
2127 .get_msglevel = smsc911x_ethtool_getmsglevel,
2128 .set_msglevel = smsc911x_ethtool_setmsglevel,
2129 .get_regs_len = smsc911x_ethtool_getregslen,
2130 .get_regs = smsc911x_ethtool_getregs,
2131 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2132 .get_eeprom = smsc911x_ethtool_get_eeprom,
2133 .set_eeprom = smsc911x_ethtool_set_eeprom,
2134 .get_ts_info = ethtool_op_get_ts_info,
2135 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2136 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2137 };
2138
2139 static const struct net_device_ops smsc911x_netdev_ops = {
2140 .ndo_open = smsc911x_open,
2141 .ndo_stop = smsc911x_stop,
2142 .ndo_start_xmit = smsc911x_hard_start_xmit,
2143 .ndo_get_stats = smsc911x_get_stats,
2144 .ndo_set_rx_mode = smsc911x_set_multicast_list,
2145 .ndo_do_ioctl = smsc911x_do_ioctl,
2146 .ndo_change_mtu = eth_change_mtu,
2147 .ndo_validate_addr = eth_validate_addr,
2148 .ndo_set_mac_address = smsc911x_set_mac_address,
2149 #ifdef CONFIG_NET_POLL_CONTROLLER
2150 .ndo_poll_controller = smsc911x_poll_controller,
2151 #endif
2152 };
2153
2154 /* copies the current mac address from hardware to dev->dev_addr */
2155 static void smsc911x_read_mac_address(struct net_device *dev)
2156 {
2157 struct smsc911x_data *pdata = netdev_priv(dev);
2158 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2159 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2160
2161 dev->dev_addr[0] = (u8)(mac_low32);
2162 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2163 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2164 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2165 dev->dev_addr[4] = (u8)(mac_high16);
2166 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2167 }
2168
2169 /* Initializing private device structures, only called from probe */
2170 static int smsc911x_init(struct net_device *dev)
2171 {
2172 struct smsc911x_data *pdata = netdev_priv(dev);
2173 unsigned int byte_test, mask;
2174 unsigned int to = 100;
2175
2176 SMSC_TRACE(pdata, probe, "Driver Parameters:");
2177 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2178 (unsigned long)pdata->ioaddr);
2179 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2180 SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2181
2182 spin_lock_init(&pdata->dev_lock);
2183 spin_lock_init(&pdata->mac_lock);
2184
2185 if (pdata->ioaddr == NULL) {
2186 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2187 return -ENODEV;
2188 }
2189
2190 /*
2191 * poll the READY bit in PMT_CTRL. Any other access to the device is
2192 * forbidden while this bit isn't set. Try for 100ms
2193 *
2194 * Note that this test is done before the WORD_SWAP register is
2195 * programmed. So in some configurations the READY bit is at 16 before
2196 * WORD_SWAP is written to. This issue is worked around by waiting
2197 * until either bit 0 or bit 16 gets set in PMT_CTRL.
2198 *
2199 * SMSC has confirmed that checking bit 16 (marked as reserved in
2200 * the datasheet) is fine since these bits "will either never be set
2201 * or can only go high after READY does (so also indicate the device
2202 * is ready)".
2203 */
2204
2205 mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2206 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2207 udelay(1000);
2208
2209 if (to == 0) {
2210 netdev_err(dev, "Device not READY in 100ms aborting\n");
2211 return -ENODEV;
2212 }
2213
2214 /* Check byte ordering */
2215 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2216 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2217 if (byte_test == 0x43218765) {
2218 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2219 "applying WORD_SWAP");
2220 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2221
2222 /* 1 dummy read of BYTE_TEST is needed after a write to
2223 * WORD_SWAP before its contents are valid */
2224 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2225
2226 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2227 }
2228
2229 if (byte_test != 0x87654321) {
2230 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2231 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2232 SMSC_WARN(pdata, probe,
2233 "top 16 bits equal to bottom 16 bits");
2234 SMSC_TRACE(pdata, probe,
2235 "This may mean the chip is set "
2236 "for 32 bit while the bus is reading 16 bit");
2237 }
2238 return -ENODEV;
2239 }
2240
2241 /* Default generation to zero (all workarounds apply) */
2242 pdata->generation = 0;
2243
2244 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2245 switch (pdata->idrev & 0xFFFF0000) {
2246 case 0x01180000:
2247 case 0x01170000:
2248 case 0x01160000:
2249 case 0x01150000:
2250 case 0x218A0000:
2251 /* LAN911[5678] family */
2252 pdata->generation = pdata->idrev & 0x0000FFFF;
2253 break;
2254
2255 case 0x118A0000:
2256 case 0x117A0000:
2257 case 0x116A0000:
2258 case 0x115A0000:
2259 /* LAN921[5678] family */
2260 pdata->generation = 3;
2261 break;
2262
2263 case 0x92100000:
2264 case 0x92110000:
2265 case 0x92200000:
2266 case 0x92210000:
2267 /* LAN9210/LAN9211/LAN9220/LAN9221 */
2268 pdata->generation = 4;
2269 break;
2270
2271 default:
2272 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2273 pdata->idrev);
2274 return -ENODEV;
2275 }
2276
2277 SMSC_TRACE(pdata, probe,
2278 "LAN911x identified, idrev: 0x%08X, generation: %d",
2279 pdata->idrev, pdata->generation);
2280
2281 if (pdata->generation == 0)
2282 SMSC_WARN(pdata, probe,
2283 "This driver is not intended for this chip revision");
2284
2285 /* workaround for platforms without an eeprom, where the mac address
2286 * is stored elsewhere and set by the bootloader. This saves the
2287 * mac address before resetting the device */
2288 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2289 spin_lock_irq(&pdata->mac_lock);
2290 smsc911x_read_mac_address(dev);
2291 spin_unlock_irq(&pdata->mac_lock);
2292 }
2293
2294 /* Reset the LAN911x */
2295 if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
2296 return -ENODEV;
2297
2298 dev->flags |= IFF_MULTICAST;
2299 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2300 dev->netdev_ops = &smsc911x_netdev_ops;
2301 dev->ethtool_ops = &smsc911x_ethtool_ops;
2302
2303 return 0;
2304 }
2305
2306 static int smsc911x_drv_remove(struct platform_device *pdev)
2307 {
2308 struct net_device *dev;
2309 struct smsc911x_data *pdata;
2310 struct resource *res;
2311
2312 dev = platform_get_drvdata(pdev);
2313 BUG_ON(!dev);
2314 pdata = netdev_priv(dev);
2315 BUG_ON(!pdata);
2316 BUG_ON(!pdata->ioaddr);
2317 WARN_ON(dev->phydev);
2318
2319 SMSC_TRACE(pdata, ifdown, "Stopping driver");
2320
2321 mdiobus_unregister(pdata->mii_bus);
2322 mdiobus_free(pdata->mii_bus);
2323
2324 unregister_netdev(dev);
2325 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2326 "smsc911x-memory");
2327 if (!res)
2328 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2329
2330 release_mem_region(res->start, resource_size(res));
2331
2332 iounmap(pdata->ioaddr);
2333
2334 (void)smsc911x_disable_resources(pdev);
2335 smsc911x_free_resources(pdev);
2336
2337 free_netdev(dev);
2338
2339 pm_runtime_put(&pdev->dev);
2340 pm_runtime_disable(&pdev->dev);
2341
2342 return 0;
2343 }
2344
2345 /* standard register acces */
2346 static const struct smsc911x_ops standard_smsc911x_ops = {
2347 .reg_read = __smsc911x_reg_read,
2348 .reg_write = __smsc911x_reg_write,
2349 .rx_readfifo = smsc911x_rx_readfifo,
2350 .tx_writefifo = smsc911x_tx_writefifo,
2351 };
2352
2353 /* shifted register access */
2354 static const struct smsc911x_ops shifted_smsc911x_ops = {
2355 .reg_read = __smsc911x_reg_read_shift,
2356 .reg_write = __smsc911x_reg_write_shift,
2357 .rx_readfifo = smsc911x_rx_readfifo_shift,
2358 .tx_writefifo = smsc911x_tx_writefifo_shift,
2359 };
2360
2361 static int smsc911x_probe_config(struct smsc911x_platform_config *config,
2362 struct device *dev)
2363 {
2364 int phy_interface;
2365 u32 width = 0;
2366 int err;
2367
2368 phy_interface = device_get_phy_mode(dev);
2369 if (phy_interface < 0)
2370 phy_interface = PHY_INTERFACE_MODE_NA;
2371 config->phy_interface = phy_interface;
2372
2373 device_get_mac_address(dev, config->mac, ETH_ALEN);
2374
2375 err = device_property_read_u32(dev, "reg-io-width", &width);
2376 if (err == -ENXIO)
2377 return err;
2378 if (!err && width == 4)
2379 config->flags |= SMSC911X_USE_32BIT;
2380 else
2381 config->flags |= SMSC911X_USE_16BIT;
2382
2383 device_property_read_u32(dev, "reg-shift", &config->shift);
2384
2385 if (device_property_present(dev, "smsc,irq-active-high"))
2386 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2387
2388 if (device_property_present(dev, "smsc,irq-push-pull"))
2389 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2390
2391 if (device_property_present(dev, "smsc,force-internal-phy"))
2392 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2393
2394 if (device_property_present(dev, "smsc,force-external-phy"))
2395 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2396
2397 if (device_property_present(dev, "smsc,save-mac-address"))
2398 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2399
2400 return 0;
2401 }
2402
2403 static int smsc911x_drv_probe(struct platform_device *pdev)
2404 {
2405 struct net_device *dev;
2406 struct smsc911x_data *pdata;
2407 struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2408 struct resource *res;
2409 int res_size, irq;
2410 int retval;
2411
2412 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2413 "smsc911x-memory");
2414 if (!res)
2415 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2416 if (!res) {
2417 pr_warn("Could not allocate resource\n");
2418 retval = -ENODEV;
2419 goto out_0;
2420 }
2421 res_size = resource_size(res);
2422
2423 irq = platform_get_irq(pdev, 0);
2424 if (irq == -EPROBE_DEFER) {
2425 retval = -EPROBE_DEFER;
2426 goto out_0;
2427 } else if (irq <= 0) {
2428 pr_warn("Could not allocate irq resource\n");
2429 retval = -ENODEV;
2430 goto out_0;
2431 }
2432
2433 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2434 retval = -EBUSY;
2435 goto out_0;
2436 }
2437
2438 dev = alloc_etherdev(sizeof(struct smsc911x_data));
2439 if (!dev) {
2440 retval = -ENOMEM;
2441 goto out_release_io_1;
2442 }
2443
2444 SET_NETDEV_DEV(dev, &pdev->dev);
2445
2446 pdata = netdev_priv(dev);
2447 dev->irq = irq;
2448 pdata->ioaddr = ioremap_nocache(res->start, res_size);
2449
2450 pdata->dev = dev;
2451 pdata->msg_enable = ((1 << debug) - 1);
2452
2453 platform_set_drvdata(pdev, dev);
2454
2455 retval = smsc911x_request_resources(pdev);
2456 if (retval)
2457 goto out_request_resources_fail;
2458
2459 retval = smsc911x_enable_resources(pdev);
2460 if (retval)
2461 goto out_enable_resources_fail;
2462
2463 if (pdata->ioaddr == NULL) {
2464 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2465 retval = -ENOMEM;
2466 goto out_disable_resources;
2467 }
2468
2469 retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
2470 if (retval && config) {
2471 /* copy config parameters across to pdata */
2472 memcpy(&pdata->config, config, sizeof(pdata->config));
2473 retval = 0;
2474 }
2475
2476 if (retval) {
2477 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2478 goto out_disable_resources;
2479 }
2480
2481 /* assume standard, non-shifted, access to HW registers */
2482 pdata->ops = &standard_smsc911x_ops;
2483 /* apply the right access if shifting is needed */
2484 if (pdata->config.shift)
2485 pdata->ops = &shifted_smsc911x_ops;
2486
2487 pm_runtime_enable(&pdev->dev);
2488 pm_runtime_get_sync(&pdev->dev);
2489
2490 retval = smsc911x_init(dev);
2491 if (retval < 0)
2492 goto out_disable_resources;
2493
2494 netif_carrier_off(dev);
2495
2496 retval = smsc911x_mii_init(pdev, dev);
2497 if (retval) {
2498 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2499 goto out_disable_resources;
2500 }
2501
2502 retval = register_netdev(dev);
2503 if (retval) {
2504 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2505 goto out_disable_resources;
2506 } else {
2507 SMSC_TRACE(pdata, probe,
2508 "Network interface: \"%s\"", dev->name);
2509 }
2510
2511 spin_lock_irq(&pdata->mac_lock);
2512
2513 /* Check if mac address has been specified when bringing interface up */
2514 if (is_valid_ether_addr(dev->dev_addr)) {
2515 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2516 SMSC_TRACE(pdata, probe,
2517 "MAC Address is specified by configuration");
2518 } else if (is_valid_ether_addr(pdata->config.mac)) {
2519 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2520 SMSC_TRACE(pdata, probe,
2521 "MAC Address specified by platform data");
2522 } else {
2523 /* Try reading mac address from device. if EEPROM is present
2524 * it will already have been set */
2525 smsc_get_mac(dev);
2526
2527 if (is_valid_ether_addr(dev->dev_addr)) {
2528 /* eeprom values are valid so use them */
2529 SMSC_TRACE(pdata, probe,
2530 "Mac Address is read from LAN911x EEPROM");
2531 } else {
2532 /* eeprom values are invalid, generate random MAC */
2533 eth_hw_addr_random(dev);
2534 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2535 SMSC_TRACE(pdata, probe,
2536 "MAC Address is set to eth_random_addr");
2537 }
2538 }
2539
2540 spin_unlock_irq(&pdata->mac_lock);
2541
2542 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2543
2544 return 0;
2545
2546 out_disable_resources:
2547 pm_runtime_put(&pdev->dev);
2548 pm_runtime_disable(&pdev->dev);
2549 (void)smsc911x_disable_resources(pdev);
2550 out_enable_resources_fail:
2551 smsc911x_free_resources(pdev);
2552 out_request_resources_fail:
2553 iounmap(pdata->ioaddr);
2554 free_netdev(dev);
2555 out_release_io_1:
2556 release_mem_region(res->start, resource_size(res));
2557 out_0:
2558 return retval;
2559 }
2560
2561 #ifdef CONFIG_PM
2562 /* This implementation assumes the devices remains powered on its VDDVARIO
2563 * pins during suspend. */
2564
2565 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2566
2567 static int smsc911x_suspend(struct device *dev)
2568 {
2569 struct net_device *ndev = dev_get_drvdata(dev);
2570 struct smsc911x_data *pdata = netdev_priv(ndev);
2571
2572 /* enable wake on LAN, energy detection and the external PME
2573 * signal. */
2574 smsc911x_reg_write(pdata, PMT_CTRL,
2575 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2576 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2577
2578 return 0;
2579 }
2580
2581 static int smsc911x_resume(struct device *dev)
2582 {
2583 struct net_device *ndev = dev_get_drvdata(dev);
2584 struct smsc911x_data *pdata = netdev_priv(ndev);
2585 unsigned int to = 100;
2586
2587 /* Note 3.11 from the datasheet:
2588 * "When the LAN9220 is in a power saving state, a write of any
2589 * data to the BYTE_TEST register will wake-up the device."
2590 */
2591 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2592
2593 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2594 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2595 * if it failed. */
2596 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2597 udelay(1000);
2598
2599 return (to == 0) ? -EIO : 0;
2600 }
2601
2602 static const struct dev_pm_ops smsc911x_pm_ops = {
2603 .suspend = smsc911x_suspend,
2604 .resume = smsc911x_resume,
2605 };
2606
2607 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2608
2609 #else
2610 #define SMSC911X_PM_OPS NULL
2611 #endif
2612
2613 #ifdef CONFIG_OF
2614 static const struct of_device_id smsc911x_dt_ids[] = {
2615 { .compatible = "smsc,lan9115", },
2616 { /* sentinel */ }
2617 };
2618 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2619 #endif
2620
2621 static const struct acpi_device_id smsc911x_acpi_match[] = {
2622 { "ARMH9118", 0 },
2623 { }
2624 };
2625 MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
2626
2627 static struct platform_driver smsc911x_driver = {
2628 .probe = smsc911x_drv_probe,
2629 .remove = smsc911x_drv_remove,
2630 .driver = {
2631 .name = SMSC_CHIPNAME,
2632 .pm = SMSC911X_PM_OPS,
2633 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2634 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
2635 },
2636 };
2637
2638 /* Entry point for loading the module */
2639 static int __init smsc911x_init_module(void)
2640 {
2641 SMSC_INITIALIZE();
2642 return platform_driver_register(&smsc911x_driver);
2643 }
2644
2645 /* entry point for unloading the module */
2646 static void __exit smsc911x_cleanup_module(void)
2647 {
2648 platform_driver_unregister(&smsc911x_driver);
2649 }
2650
2651 module_init(smsc911x_init_module);
2652 module_exit(smsc911x_cleanup_module);
Linux kernel - Deliverables
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