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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / smsc / smsc911x.c
blob7e38bc78409257ce59f51b303942a140d8d54c49
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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *
20 ***************************************************************************
21 * Rewritten, heavily based on smsc911x simple driver by SMSC.
22 * Partly uses io macros from smc91x.c by Nicolas Pitre
23 *
24 * Supported devices:
25 * LAN9115, LAN9116, LAN9117, LAN9118
26 * LAN9215, LAN9216, LAN9217, LAN9218
27 * LAN9210, LAN9211
28 * LAN9220, LAN9221
29 * LAN89218
30 *
31 */
32
33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
34
35 #include <linux/crc32.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 "smsc911x.h"
63
64 #define SMSC_CHIPNAME "smsc911x"
65 #define SMSC_MDIONAME "smsc911x-mdio"
66 #define SMSC_DRV_VERSION "2008-10-21"
67
68 MODULE_LICENSE("GPL");
69 MODULE_VERSION(SMSC_DRV_VERSION);
70 MODULE_ALIAS("platform:smsc911x");
71
72 #if USE_DEBUG > 0
73 static int debug = 16;
74 #else
75 static int debug = 3;
76 #endif
77
78 module_param(debug, int, 0);
79 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
80
81 struct smsc911x_data;
82
83 struct smsc911x_ops {
84 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
85 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
86 void (*rx_readfifo)(struct smsc911x_data *pdata,
87 unsigned int *buf, unsigned int wordcount);
88 void (*tx_writefifo)(struct smsc911x_data *pdata,
89 unsigned int *buf, unsigned int wordcount);
90 };
91
92 #define SMSC911X_NUM_SUPPLIES 2
93
94 struct smsc911x_data {
95 void __iomem *ioaddr;
96
97 unsigned int idrev;
98
99 /* used to decide which workarounds apply */
100 unsigned int generation;
101
102 /* device configuration (copied from platform_data during probe) */
103 struct smsc911x_platform_config config;
104
105 /* This needs to be acquired before calling any of below:
106 * smsc911x_mac_read(), smsc911x_mac_write()
107 */
108 spinlock_t mac_lock;
109
110 /* spinlock to ensure register accesses are serialised */
111 spinlock_t dev_lock;
112
113 struct phy_device *phy_dev;
114 struct mii_bus *mii_bus;
115 int phy_irq[PHY_MAX_ADDR];
116 unsigned int using_extphy;
117 int last_duplex;
118 int last_carrier;
119
120 u32 msg_enable;
121 unsigned int gpio_setting;
122 unsigned int gpio_orig_setting;
123 struct net_device *dev;
124 struct napi_struct napi;
125
126 unsigned int software_irq_signal;
127
128 #ifdef USE_PHY_WORK_AROUND
129 #define MIN_PACKET_SIZE (64)
130 char loopback_tx_pkt[MIN_PACKET_SIZE];
131 char loopback_rx_pkt[MIN_PACKET_SIZE];
132 unsigned int resetcount;
133 #endif
134
135 /* Members for Multicast filter workaround */
136 unsigned int multicast_update_pending;
137 unsigned int set_bits_mask;
138 unsigned int clear_bits_mask;
139 unsigned int hashhi;
140 unsigned int hashlo;
141
142 /* register access functions */
143 const struct smsc911x_ops *ops;
144
145 /* regulators */
146 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
147 };
148
149 /* Easy access to information */
150 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
151
152 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
153 {
154 if (pdata->config.flags & SMSC911X_USE_32BIT)
155 return readl(pdata->ioaddr + reg);
156
157 if (pdata->config.flags & SMSC911X_USE_16BIT)
158 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
159 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
160
161 BUG();
162 return 0;
163 }
164
165 static inline u32
166 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
167 {
168 if (pdata->config.flags & SMSC911X_USE_32BIT)
169 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
170
171 if (pdata->config.flags & SMSC911X_USE_16BIT)
172 return (readw(pdata->ioaddr +
173 __smsc_shift(pdata, reg)) & 0xFFFF) |
174 ((readw(pdata->ioaddr +
175 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
176
177 BUG();
178 return 0;
179 }
180
181 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
182 {
183 u32 data;
184 unsigned long flags;
185
186 spin_lock_irqsave(&pdata->dev_lock, flags);
187 data = pdata->ops->reg_read(pdata, reg);
188 spin_unlock_irqrestore(&pdata->dev_lock, flags);
189
190 return data;
191 }
192
193 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
194 u32 val)
195 {
196 if (pdata->config.flags & SMSC911X_USE_32BIT) {
197 writel(val, pdata->ioaddr + reg);
198 return;
199 }
200
201 if (pdata->config.flags & SMSC911X_USE_16BIT) {
202 writew(val & 0xFFFF, pdata->ioaddr + reg);
203 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
204 return;
205 }
206
207 BUG();
208 }
209
210 static inline void
211 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
212 {
213 if (pdata->config.flags & SMSC911X_USE_32BIT) {
214 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
215 return;
216 }
217
218 if (pdata->config.flags & SMSC911X_USE_16BIT) {
219 writew(val & 0xFFFF,
220 pdata->ioaddr + __smsc_shift(pdata, reg));
221 writew((val >> 16) & 0xFFFF,
222 pdata->ioaddr + __smsc_shift(pdata, reg + 2));
223 return;
224 }
225
226 BUG();
227 }
228
229 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
230 u32 val)
231 {
232 unsigned long flags;
233
234 spin_lock_irqsave(&pdata->dev_lock, flags);
235 pdata->ops->reg_write(pdata, reg, val);
236 spin_unlock_irqrestore(&pdata->dev_lock, flags);
237 }
238
239 /* Writes a packet to the TX_DATA_FIFO */
240 static inline void
241 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
242 unsigned int wordcount)
243 {
244 unsigned long flags;
245
246 spin_lock_irqsave(&pdata->dev_lock, flags);
247
248 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
249 while (wordcount--)
250 __smsc911x_reg_write(pdata, TX_DATA_FIFO,
251 swab32(*buf++));
252 goto out;
253 }
254
255 if (pdata->config.flags & SMSC911X_USE_32BIT) {
256 writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
257 goto out;
258 }
259
260 if (pdata->config.flags & SMSC911X_USE_16BIT) {
261 while (wordcount--)
262 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
263 goto out;
264 }
265
266 BUG();
267 out:
268 spin_unlock_irqrestore(&pdata->dev_lock, flags);
269 }
270
271 /* Writes a packet to the TX_DATA_FIFO - shifted version */
272 static inline void
273 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
274 unsigned int wordcount)
275 {
276 unsigned long flags;
277
278 spin_lock_irqsave(&pdata->dev_lock, flags);
279
280 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
281 while (wordcount--)
282 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
283 swab32(*buf++));
284 goto out;
285 }
286
287 if (pdata->config.flags & SMSC911X_USE_32BIT) {
288 writesl(pdata->ioaddr + __smsc_shift(pdata,
289 TX_DATA_FIFO), buf, wordcount);
290 goto out;
291 }
292
293 if (pdata->config.flags & SMSC911X_USE_16BIT) {
294 while (wordcount--)
295 __smsc911x_reg_write_shift(pdata,
296 TX_DATA_FIFO, *buf++);
297 goto out;
298 }
299
300 BUG();
301 out:
302 spin_unlock_irqrestore(&pdata->dev_lock, flags);
303 }
304
305 /* Reads a packet out of the RX_DATA_FIFO */
306 static inline void
307 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
308 unsigned int wordcount)
309 {
310 unsigned long flags;
311
312 spin_lock_irqsave(&pdata->dev_lock, flags);
313
314 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
315 while (wordcount--)
316 *buf++ = swab32(__smsc911x_reg_read(pdata,
317 RX_DATA_FIFO));
318 goto out;
319 }
320
321 if (pdata->config.flags & SMSC911X_USE_32BIT) {
322 readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
323 goto out;
324 }
325
326 if (pdata->config.flags & SMSC911X_USE_16BIT) {
327 while (wordcount--)
328 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
329 goto out;
330 }
331
332 BUG();
333 out:
334 spin_unlock_irqrestore(&pdata->dev_lock, flags);
335 }
336
337 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
338 static inline void
339 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
340 unsigned int wordcount)
341 {
342 unsigned long flags;
343
344 spin_lock_irqsave(&pdata->dev_lock, flags);
345
346 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
347 while (wordcount--)
348 *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
349 RX_DATA_FIFO));
350 goto out;
351 }
352
353 if (pdata->config.flags & SMSC911X_USE_32BIT) {
354 readsl(pdata->ioaddr + __smsc_shift(pdata,
355 RX_DATA_FIFO), buf, wordcount);
356 goto out;
357 }
358
359 if (pdata->config.flags & SMSC911X_USE_16BIT) {
360 while (wordcount--)
361 *buf++ = __smsc911x_reg_read_shift(pdata,
362 RX_DATA_FIFO);
363 goto out;
364 }
365
366 BUG();
367 out:
368 spin_unlock_irqrestore(&pdata->dev_lock, flags);
369 }
370
371 /*
372 * enable resources, currently just regulators.
373 */
374 static int smsc911x_enable_resources(struct platform_device *pdev)
375 {
376 struct net_device *ndev = platform_get_drvdata(pdev);
377 struct smsc911x_data *pdata = netdev_priv(ndev);
378 int ret = 0;
379
380 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
381 pdata->supplies);
382 if (ret)
383 netdev_err(ndev, "failed to enable regulators %d\n",
384 ret);
385 return ret;
386 }
387
388 /*
389 * disable resources, currently just regulators.
390 */
391 static int smsc911x_disable_resources(struct platform_device *pdev)
392 {
393 struct net_device *ndev = platform_get_drvdata(pdev);
394 struct smsc911x_data *pdata = netdev_priv(ndev);
395 int ret = 0;
396
397 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
398 pdata->supplies);
399 return ret;
400 }
401
402 /*
403 * Request resources, currently just regulators.
404 *
405 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
406 * these are not always-on we need to request regulators to be turned on
407 * before we can try to access the device registers.
408 */
409 static int smsc911x_request_resources(struct platform_device *pdev)
410 {
411 struct net_device *ndev = platform_get_drvdata(pdev);
412 struct smsc911x_data *pdata = netdev_priv(ndev);
413 int ret = 0;
414
415 /* Request regulators */
416 pdata->supplies[0].supply = "vdd33a";
417 pdata->supplies[1].supply = "vddvario";
418 ret = regulator_bulk_get(&pdev->dev,
419 ARRAY_SIZE(pdata->supplies),
420 pdata->supplies);
421 if (ret)
422 netdev_err(ndev, "couldn't get regulators %d\n",
423 ret);
424 return ret;
425 }
426
427 /*
428 * Free resources, currently just regulators.
429 *
430 */
431 static void smsc911x_free_resources(struct platform_device *pdev)
432 {
433 struct net_device *ndev = platform_get_drvdata(pdev);
434 struct smsc911x_data *pdata = netdev_priv(ndev);
435
436 /* Free regulators */
437 regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
438 pdata->supplies);
439 }
440
441 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
442 * and smsc911x_mac_write, so assumes mac_lock is held */
443 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
444 {
445 int i;
446 u32 val;
447
448 SMSC_ASSERT_MAC_LOCK(pdata);
449
450 for (i = 0; i < 40; i++) {
451 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
452 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
453 return 0;
454 }
455 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
456 "MAC_CSR_CMD: 0x%08X", val);
457 return -EIO;
458 }
459
460 /* Fetches a MAC register value. Assumes mac_lock is acquired */
461 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
462 {
463 unsigned int temp;
464
465 SMSC_ASSERT_MAC_LOCK(pdata);
466
467 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
468 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
469 SMSC_WARN(pdata, hw, "MAC busy at entry");
470 return 0xFFFFFFFF;
471 }
472
473 /* Send the MAC cmd */
474 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
475 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
476
477 /* Workaround for hardware read-after-write restriction */
478 temp = smsc911x_reg_read(pdata, BYTE_TEST);
479
480 /* Wait for the read to complete */
481 if (likely(smsc911x_mac_complete(pdata) == 0))
482 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
483
484 SMSC_WARN(pdata, hw, "MAC busy after read");
485 return 0xFFFFFFFF;
486 }
487
488 /* Set a mac register, mac_lock must be acquired before calling */
489 static void smsc911x_mac_write(struct smsc911x_data *pdata,
490 unsigned int offset, u32 val)
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,
499 "smsc911x_mac_write failed, MAC busy at entry");
500 return;
501 }
502
503 /* Send data to write */
504 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
505
506 /* Write the actual data */
507 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
508 MAC_CSR_CMD_CSR_BUSY_));
509
510 /* Workaround for hardware read-after-write restriction */
511 temp = smsc911x_reg_read(pdata, BYTE_TEST);
512
513 /* Wait for the write to complete */
514 if (likely(smsc911x_mac_complete(pdata) == 0))
515 return;
516
517 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
518 }
519
520 /* Get a phy register */
521 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
522 {
523 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
524 unsigned long flags;
525 unsigned int addr;
526 int i, reg;
527
528 spin_lock_irqsave(&pdata->mac_lock, flags);
529
530 /* Confirm MII not busy */
531 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
532 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
533 reg = -EIO;
534 goto out;
535 }
536
537 /* Set the address, index & direction (read from PHY) */
538 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
539 smsc911x_mac_write(pdata, MII_ACC, addr);
540
541 /* Wait for read to complete w/ timeout */
542 for (i = 0; i < 100; i++)
543 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
544 reg = smsc911x_mac_read(pdata, MII_DATA);
545 goto out;
546 }
547
548 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
549 reg = -EIO;
550
551 out:
552 spin_unlock_irqrestore(&pdata->mac_lock, flags);
553 return reg;
554 }
555
556 /* Set a phy register */
557 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
558 u16 val)
559 {
560 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
561 unsigned long flags;
562 unsigned int addr;
563 int i, reg;
564
565 spin_lock_irqsave(&pdata->mac_lock, flags);
566
567 /* Confirm MII not busy */
568 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
569 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
570 reg = -EIO;
571 goto out;
572 }
573
574 /* Put the data to write in the MAC */
575 smsc911x_mac_write(pdata, MII_DATA, val);
576
577 /* Set the address, index & direction (write to PHY) */
578 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
579 MII_ACC_MII_WRITE_;
580 smsc911x_mac_write(pdata, MII_ACC, addr);
581
582 /* Wait for write to complete w/ timeout */
583 for (i = 0; i < 100; i++)
584 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
585 reg = 0;
586 goto out;
587 }
588
589 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
590 reg = -EIO;
591
592 out:
593 spin_unlock_irqrestore(&pdata->mac_lock, flags);
594 return reg;
595 }
596
597 /* Switch to external phy. Assumes tx and rx are stopped. */
598 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
599 {
600 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
601
602 /* Disable phy clocks to the MAC */
603 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
604 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
605 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
606 udelay(10); /* Enough time for clocks to stop */
607
608 /* Switch to external phy */
609 hwcfg |= HW_CFG_EXT_PHY_EN_;
610 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
611
612 /* Enable phy clocks to the MAC */
613 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
614 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
615 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
616 udelay(10); /* Enough time for clocks to restart */
617
618 hwcfg |= HW_CFG_SMI_SEL_;
619 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
620 }
621
622 /* Autodetects and enables external phy if present on supported chips.
623 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
624 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
625 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
626 {
627 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
628
629 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
630 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
631 pdata->using_extphy = 0;
632 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
633 SMSC_TRACE(pdata, hw, "Forcing external PHY");
634 smsc911x_phy_enable_external(pdata);
635 pdata->using_extphy = 1;
636 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
637 SMSC_TRACE(pdata, hw,
638 "HW_CFG EXT_PHY_DET set, using external PHY");
639 smsc911x_phy_enable_external(pdata);
640 pdata->using_extphy = 1;
641 } else {
642 SMSC_TRACE(pdata, hw,
643 "HW_CFG EXT_PHY_DET clear, using internal PHY");
644 pdata->using_extphy = 0;
645 }
646 }
647
648 /* Fetches a tx status out of the status fifo */
649 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
650 {
651 unsigned int result =
652 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
653
654 if (result != 0)
655 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
656
657 return result;
658 }
659
660 /* Fetches the next rx status */
661 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
662 {
663 unsigned int result =
664 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
665
666 if (result != 0)
667 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
668
669 return result;
670 }
671
672 #ifdef USE_PHY_WORK_AROUND
673 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
674 {
675 unsigned int tries;
676 u32 wrsz;
677 u32 rdsz;
678 ulong bufp;
679
680 for (tries = 0; tries < 10; tries++) {
681 unsigned int txcmd_a;
682 unsigned int txcmd_b;
683 unsigned int status;
684 unsigned int pktlength;
685 unsigned int i;
686
687 /* Zero-out rx packet memory */
688 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
689
690 /* Write tx packet to 118 */
691 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
692 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
693 txcmd_a |= MIN_PACKET_SIZE;
694
695 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
696
697 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
698 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
699
700 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
701 wrsz = MIN_PACKET_SIZE + 3;
702 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
703 wrsz >>= 2;
704
705 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
706
707 /* Wait till transmit is done */
708 i = 60;
709 do {
710 udelay(5);
711 status = smsc911x_tx_get_txstatus(pdata);
712 } while ((i--) && (!status));
713
714 if (!status) {
715 SMSC_WARN(pdata, hw,
716 "Failed to transmit during loopback test");
717 continue;
718 }
719 if (status & TX_STS_ES_) {
720 SMSC_WARN(pdata, hw,
721 "Transmit encountered errors during loopback test");
722 continue;
723 }
724
725 /* Wait till receive is done */
726 i = 60;
727 do {
728 udelay(5);
729 status = smsc911x_rx_get_rxstatus(pdata);
730 } while ((i--) && (!status));
731
732 if (!status) {
733 SMSC_WARN(pdata, hw,
734 "Failed to receive during loopback test");
735 continue;
736 }
737 if (status & RX_STS_ES_) {
738 SMSC_WARN(pdata, hw,
739 "Receive encountered errors during loopback test");
740 continue;
741 }
742
743 pktlength = ((status & 0x3FFF0000UL) >> 16);
744 bufp = (ulong)pdata->loopback_rx_pkt;
745 rdsz = pktlength + 3;
746 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
747 rdsz >>= 2;
748
749 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
750
751 if (pktlength != (MIN_PACKET_SIZE + 4)) {
752 SMSC_WARN(pdata, hw, "Unexpected packet size "
753 "during loop back test, size=%d, will retry",
754 pktlength);
755 } else {
756 unsigned int j;
757 int mismatch = 0;
758 for (j = 0; j < MIN_PACKET_SIZE; j++) {
759 if (pdata->loopback_tx_pkt[j]
760 != pdata->loopback_rx_pkt[j]) {
761 mismatch = 1;
762 break;
763 }
764 }
765 if (!mismatch) {
766 SMSC_TRACE(pdata, hw, "Successfully verified "
767 "loopback packet");
768 return 0;
769 } else {
770 SMSC_WARN(pdata, hw, "Data mismatch "
771 "during loop back test, will retry");
772 }
773 }
774 }
775
776 return -EIO;
777 }
778
779 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
780 {
781 struct phy_device *phy_dev = pdata->phy_dev;
782 unsigned int temp;
783 unsigned int i = 100000;
784
785 BUG_ON(!phy_dev);
786 BUG_ON(!phy_dev->bus);
787
788 SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset");
789 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
790 do {
791 msleep(1);
792 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
793 MII_BMCR);
794 } while ((i--) && (temp & BMCR_RESET));
795
796 if (temp & BMCR_RESET) {
797 SMSC_WARN(pdata, hw, "PHY reset failed to complete");
798 return -EIO;
799 }
800 /* Extra delay required because the phy may not be completed with
801 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
802 * enough delay but using 1ms here to be safe */
803 msleep(1);
804
805 return 0;
806 }
807
808 static int smsc911x_phy_loopbacktest(struct net_device *dev)
809 {
810 struct smsc911x_data *pdata = netdev_priv(dev);
811 struct phy_device *phy_dev = pdata->phy_dev;
812 int result = -EIO;
813 unsigned int i, val;
814 unsigned long flags;
815
816 /* Initialise tx packet using broadcast destination address */
817 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN);
818
819 /* Use incrementing source address */
820 for (i = 6; i < 12; i++)
821 pdata->loopback_tx_pkt[i] = (char)i;
822
823 /* Set length type field */
824 pdata->loopback_tx_pkt[12] = 0x00;
825 pdata->loopback_tx_pkt[13] = 0x00;
826
827 for (i = 14; i < MIN_PACKET_SIZE; i++)
828 pdata->loopback_tx_pkt[i] = (char)i;
829
830 val = smsc911x_reg_read(pdata, HW_CFG);
831 val &= HW_CFG_TX_FIF_SZ_;
832 val |= HW_CFG_SF_;
833 smsc911x_reg_write(pdata, HW_CFG, val);
834
835 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
836 smsc911x_reg_write(pdata, RX_CFG,
837 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
838
839 for (i = 0; i < 10; i++) {
840 /* Set PHY to 10/FD, no ANEG, and loopback mode */
841 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR,
842 BMCR_LOOPBACK | BMCR_FULLDPLX);
843
844 /* Enable MAC tx/rx, FD */
845 spin_lock_irqsave(&pdata->mac_lock, flags);
846 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
847 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
848 spin_unlock_irqrestore(&pdata->mac_lock, flags);
849
850 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
851 result = 0;
852 break;
853 }
854 pdata->resetcount++;
855
856 /* Disable MAC rx */
857 spin_lock_irqsave(&pdata->mac_lock, flags);
858 smsc911x_mac_write(pdata, MAC_CR, 0);
859 spin_unlock_irqrestore(&pdata->mac_lock, flags);
860
861 smsc911x_phy_reset(pdata);
862 }
863
864 /* Disable MAC */
865 spin_lock_irqsave(&pdata->mac_lock, flags);
866 smsc911x_mac_write(pdata, MAC_CR, 0);
867 spin_unlock_irqrestore(&pdata->mac_lock, flags);
868
869 /* Cancel PHY loopback mode */
870 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
871
872 smsc911x_reg_write(pdata, TX_CFG, 0);
873 smsc911x_reg_write(pdata, RX_CFG, 0);
874
875 return result;
876 }
877 #endif /* USE_PHY_WORK_AROUND */
878
879 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
880 {
881 struct phy_device *phy_dev = pdata->phy_dev;
882 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
883 u32 flow;
884 unsigned long flags;
885
886 if (phy_dev->duplex == DUPLEX_FULL) {
887 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
888 u16 rmtadv = phy_read(phy_dev, MII_LPA);
889 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
890
891 if (cap & FLOW_CTRL_RX)
892 flow = 0xFFFF0002;
893 else
894 flow = 0;
895
896 if (cap & FLOW_CTRL_TX)
897 afc |= 0xF;
898 else
899 afc &= ~0xF;
900
901 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
902 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
903 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
904 } else {
905 SMSC_TRACE(pdata, hw, "half duplex");
906 flow = 0;
907 afc |= 0xF;
908 }
909
910 spin_lock_irqsave(&pdata->mac_lock, flags);
911 smsc911x_mac_write(pdata, FLOW, flow);
912 spin_unlock_irqrestore(&pdata->mac_lock, flags);
913
914 smsc911x_reg_write(pdata, AFC_CFG, afc);
915 }
916
917 /* Update link mode if anything has changed. Called periodically when the
918 * PHY is in polling mode, even if nothing has changed. */
919 static void smsc911x_phy_adjust_link(struct net_device *dev)
920 {
921 struct smsc911x_data *pdata = netdev_priv(dev);
922 struct phy_device *phy_dev = pdata->phy_dev;
923 unsigned long flags;
924 int carrier;
925
926 if (phy_dev->duplex != pdata->last_duplex) {
927 unsigned int mac_cr;
928 SMSC_TRACE(pdata, hw, "duplex state has changed");
929
930 spin_lock_irqsave(&pdata->mac_lock, flags);
931 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
932 if (phy_dev->duplex) {
933 SMSC_TRACE(pdata, hw,
934 "configuring for full duplex mode");
935 mac_cr |= MAC_CR_FDPX_;
936 } else {
937 SMSC_TRACE(pdata, hw,
938 "configuring for half duplex mode");
939 mac_cr &= ~MAC_CR_FDPX_;
940 }
941 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
942 spin_unlock_irqrestore(&pdata->mac_lock, flags);
943
944 smsc911x_phy_update_flowcontrol(pdata);
945 pdata->last_duplex = phy_dev->duplex;
946 }
947
948 carrier = netif_carrier_ok(dev);
949 if (carrier != pdata->last_carrier) {
950 SMSC_TRACE(pdata, hw, "carrier state has changed");
951 if (carrier) {
952 SMSC_TRACE(pdata, hw, "configuring for carrier OK");
953 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
954 (!pdata->using_extphy)) {
955 /* Restore original GPIO configuration */
956 pdata->gpio_setting = pdata->gpio_orig_setting;
957 smsc911x_reg_write(pdata, GPIO_CFG,
958 pdata->gpio_setting);
959 }
960 } else {
961 SMSC_TRACE(pdata, hw, "configuring for no carrier");
962 /* Check global setting that LED1
963 * usage is 10/100 indicator */
964 pdata->gpio_setting = smsc911x_reg_read(pdata,
965 GPIO_CFG);
966 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
967 (!pdata->using_extphy)) {
968 /* Force 10/100 LED off, after saving
969 * original GPIO configuration */
970 pdata->gpio_orig_setting = pdata->gpio_setting;
971
972 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
973 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
974 | GPIO_CFG_GPIODIR0_
975 | GPIO_CFG_GPIOD0_);
976 smsc911x_reg_write(pdata, GPIO_CFG,
977 pdata->gpio_setting);
978 }
979 }
980 pdata->last_carrier = carrier;
981 }
982 }
983
984 static int smsc911x_mii_probe(struct net_device *dev)
985 {
986 struct smsc911x_data *pdata = netdev_priv(dev);
987 struct phy_device *phydev = NULL;
988 int ret;
989
990 /* find the first phy */
991 phydev = phy_find_first(pdata->mii_bus);
992 if (!phydev) {
993 netdev_err(dev, "no PHY found\n");
994 return -ENODEV;
995 }
996
997 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
998 phydev->addr, phydev->phy_id);
999
1000 ret = phy_connect_direct(dev, phydev,
1001 &smsc911x_phy_adjust_link, 0,
1002 pdata->config.phy_interface);
1003
1004 if (ret) {
1005 netdev_err(dev, "Could not attach to PHY\n");
1006 return ret;
1007 }
1008
1009 netdev_info(dev,
1010 "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
1011 phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
1012
1013 /* mask with MAC supported features */
1014 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
1015 SUPPORTED_Asym_Pause);
1016 phydev->advertising = phydev->supported;
1017
1018 pdata->phy_dev = phydev;
1019 pdata->last_duplex = -1;
1020 pdata->last_carrier = -1;
1021
1022 #ifdef USE_PHY_WORK_AROUND
1023 if (smsc911x_phy_loopbacktest(dev) < 0) {
1024 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1025 return -ENODEV;
1026 }
1027 SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1028 #endif /* USE_PHY_WORK_AROUND */
1029
1030 SMSC_TRACE(pdata, hw, "phy initialised successfully");
1031 return 0;
1032 }
1033
1034 static int __devinit smsc911x_mii_init(struct platform_device *pdev,
1035 struct net_device *dev)
1036 {
1037 struct smsc911x_data *pdata = netdev_priv(dev);
1038 int err = -ENXIO, i;
1039
1040 pdata->mii_bus = mdiobus_alloc();
1041 if (!pdata->mii_bus) {
1042 err = -ENOMEM;
1043 goto err_out_1;
1044 }
1045
1046 pdata->mii_bus->name = SMSC_MDIONAME;
1047 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1048 pdev->name, pdev->id);
1049 pdata->mii_bus->priv = pdata;
1050 pdata->mii_bus->read = smsc911x_mii_read;
1051 pdata->mii_bus->write = smsc911x_mii_write;
1052 pdata->mii_bus->irq = pdata->phy_irq;
1053 for (i = 0; i < PHY_MAX_ADDR; ++i)
1054 pdata->mii_bus->irq[i] = PHY_POLL;
1055
1056 pdata->mii_bus->parent = &pdev->dev;
1057
1058 switch (pdata->idrev & 0xFFFF0000) {
1059 case 0x01170000:
1060 case 0x01150000:
1061 case 0x117A0000:
1062 case 0x115A0000:
1063 /* External PHY supported, try to autodetect */
1064 smsc911x_phy_initialise_external(pdata);
1065 break;
1066 default:
1067 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1068 "using internal PHY");
1069 pdata->using_extphy = 0;
1070 break;
1071 }
1072
1073 if (!pdata->using_extphy) {
1074 /* Mask all PHYs except ID 1 (internal) */
1075 pdata->mii_bus->phy_mask = ~(1 << 1);
1076 }
1077
1078 if (mdiobus_register(pdata->mii_bus)) {
1079 SMSC_WARN(pdata, probe, "Error registering mii bus");
1080 goto err_out_free_bus_2;
1081 }
1082
1083 if (smsc911x_mii_probe(dev) < 0) {
1084 SMSC_WARN(pdata, probe, "Error registering mii bus");
1085 goto err_out_unregister_bus_3;
1086 }
1087
1088 return 0;
1089
1090 err_out_unregister_bus_3:
1091 mdiobus_unregister(pdata->mii_bus);
1092 err_out_free_bus_2:
1093 mdiobus_free(pdata->mii_bus);
1094 err_out_1:
1095 return err;
1096 }
1097
1098 /* Gets the number of tx statuses in the fifo */
1099 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1100 {
1101 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1102 & TX_FIFO_INF_TSUSED_) >> 16;
1103 }
1104
1105 /* Reads tx statuses and increments counters where necessary */
1106 static void smsc911x_tx_update_txcounters(struct net_device *dev)
1107 {
1108 struct smsc911x_data *pdata = netdev_priv(dev);
1109 unsigned int tx_stat;
1110
1111 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1112 if (unlikely(tx_stat & 0x80000000)) {
1113 /* In this driver the packet tag is used as the packet
1114 * length. Since a packet length can never reach the
1115 * size of 0x8000, this bit is reserved. It is worth
1116 * noting that the "reserved bit" in the warning above
1117 * does not reference a hardware defined reserved bit
1118 * but rather a driver defined one.
1119 */
1120 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1121 } else {
1122 if (unlikely(tx_stat & TX_STS_ES_)) {
1123 dev->stats.tx_errors++;
1124 } else {
1125 dev->stats.tx_packets++;
1126 dev->stats.tx_bytes += (tx_stat >> 16);
1127 }
1128 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1129 dev->stats.collisions += 16;
1130 dev->stats.tx_aborted_errors += 1;
1131 } else {
1132 dev->stats.collisions +=
1133 ((tx_stat >> 3) & 0xF);
1134 }
1135 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1136 dev->stats.tx_carrier_errors += 1;
1137 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1138 dev->stats.collisions++;
1139 dev->stats.tx_aborted_errors++;
1140 }
1141 }
1142 }
1143 }
1144
1145 /* Increments the Rx error counters */
1146 static void
1147 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1148 {
1149 int crc_err = 0;
1150
1151 if (unlikely(rxstat & RX_STS_ES_)) {
1152 dev->stats.rx_errors++;
1153 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1154 dev->stats.rx_crc_errors++;
1155 crc_err = 1;
1156 }
1157 }
1158 if (likely(!crc_err)) {
1159 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1160 (rxstat & RX_STS_LENGTH_ERR_)))
1161 dev->stats.rx_length_errors++;
1162 if (rxstat & RX_STS_MCAST_)
1163 dev->stats.multicast++;
1164 }
1165 }
1166
1167 /* Quickly dumps bad packets */
1168 static void
1169 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1170 {
1171 if (likely(pktwords >= 4)) {
1172 unsigned int timeout = 500;
1173 unsigned int val;
1174 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1175 do {
1176 udelay(1);
1177 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1178 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1179
1180 if (unlikely(timeout == 0))
1181 SMSC_WARN(pdata, hw, "Timed out waiting for "
1182 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1183 } else {
1184 unsigned int temp;
1185 while (pktwords--)
1186 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
1187 }
1188 }
1189
1190 /* NAPI poll function */
1191 static int smsc911x_poll(struct napi_struct *napi, int budget)
1192 {
1193 struct smsc911x_data *pdata =
1194 container_of(napi, struct smsc911x_data, napi);
1195 struct net_device *dev = pdata->dev;
1196 int npackets = 0;
1197
1198 while (npackets < budget) {
1199 unsigned int pktlength;
1200 unsigned int pktwords;
1201 struct sk_buff *skb;
1202 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1203
1204 if (!rxstat) {
1205 unsigned int temp;
1206 /* We processed all packets available. Tell NAPI it can
1207 * stop polling then re-enable rx interrupts */
1208 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1209 napi_complete(napi);
1210 temp = smsc911x_reg_read(pdata, INT_EN);
1211 temp |= INT_EN_RSFL_EN_;
1212 smsc911x_reg_write(pdata, INT_EN, temp);
1213 break;
1214 }
1215
1216 /* Count packet for NAPI scheduling, even if it has an error.
1217 * Error packets still require cycles to discard */
1218 npackets++;
1219
1220 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1221 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1222 smsc911x_rx_counterrors(dev, rxstat);
1223
1224 if (unlikely(rxstat & RX_STS_ES_)) {
1225 SMSC_WARN(pdata, rx_err,
1226 "Discarding packet with error bit set");
1227 /* Packet has an error, discard it and continue with
1228 * the next */
1229 smsc911x_rx_fastforward(pdata, pktwords);
1230 dev->stats.rx_dropped++;
1231 continue;
1232 }
1233
1234 skb = netdev_alloc_skb(dev, pktwords << 2);
1235 if (unlikely(!skb)) {
1236 SMSC_WARN(pdata, rx_err,
1237 "Unable to allocate skb for rx packet");
1238 /* Drop the packet and stop this polling iteration */
1239 smsc911x_rx_fastforward(pdata, pktwords);
1240 dev->stats.rx_dropped++;
1241 break;
1242 }
1243
1244 pdata->ops->rx_readfifo(pdata,
1245 (unsigned int *)skb->data, pktwords);
1246
1247 /* Align IP on 16B boundary */
1248 skb_reserve(skb, NET_IP_ALIGN);
1249 skb_put(skb, pktlength - 4);
1250 skb->protocol = eth_type_trans(skb, dev);
1251 skb_checksum_none_assert(skb);
1252 netif_receive_skb(skb);
1253
1254 /* Update counters */
1255 dev->stats.rx_packets++;
1256 dev->stats.rx_bytes += (pktlength - 4);
1257 }
1258
1259 /* Return total received packets */
1260 return npackets;
1261 }
1262
1263 /* Returns hash bit number for given MAC address
1264 * Example:
1265 * 01 00 5E 00 00 01 -> returns bit number 31 */
1266 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1267 {
1268 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1269 }
1270
1271 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1272 {
1273 /* Performs the multicast & mac_cr update. This is called when
1274 * safe on the current hardware, and with the mac_lock held */
1275 unsigned int mac_cr;
1276
1277 SMSC_ASSERT_MAC_LOCK(pdata);
1278
1279 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1280 mac_cr |= pdata->set_bits_mask;
1281 mac_cr &= ~(pdata->clear_bits_mask);
1282 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1283 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1284 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1285 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1286 mac_cr, pdata->hashhi, pdata->hashlo);
1287 }
1288
1289 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1290 {
1291 unsigned int mac_cr;
1292
1293 /* This function is only called for older LAN911x devices
1294 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1295 * be modified during Rx - newer devices immediately update the
1296 * registers.
1297 *
1298 * This is called from interrupt context */
1299
1300 spin_lock(&pdata->mac_lock);
1301
1302 /* Check Rx has stopped */
1303 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1304 SMSC_WARN(pdata, drv, "Rx not stopped");
1305
1306 /* Perform the update - safe to do now Rx has stopped */
1307 smsc911x_rx_multicast_update(pdata);
1308
1309 /* Re-enable Rx */
1310 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1311 mac_cr |= MAC_CR_RXEN_;
1312 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1313
1314 pdata->multicast_update_pending = 0;
1315
1316 spin_unlock(&pdata->mac_lock);
1317 }
1318
1319 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1320 {
1321 int rc = 0;
1322
1323 if (!pdata->phy_dev)
1324 return rc;
1325
1326 rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
1327
1328 if (rc < 0) {
1329 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1330 return rc;
1331 }
1332
1333 /*
1334 * If energy is detected the PHY is already awake so is not necessary
1335 * to disable the energy detect power-down mode.
1336 */
1337 if ((rc & MII_LAN83C185_EDPWRDOWN) &&
1338 !(rc & MII_LAN83C185_ENERGYON)) {
1339 /* Disable energy detect mode for this SMSC Transceivers */
1340 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
1341 rc & (~MII_LAN83C185_EDPWRDOWN));
1342
1343 if (rc < 0) {
1344 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1345 return rc;
1346 }
1347
1348 mdelay(1);
1349 }
1350
1351 return 0;
1352 }
1353
1354 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1355 {
1356 int rc = 0;
1357
1358 if (!pdata->phy_dev)
1359 return rc;
1360
1361 rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
1362
1363 if (rc < 0) {
1364 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1365 return rc;
1366 }
1367
1368 /* Only enable if energy detect mode is already disabled */
1369 if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1370 mdelay(100);
1371 /* Enable energy detect mode for this SMSC Transceivers */
1372 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
1373 rc | MII_LAN83C185_EDPWRDOWN);
1374
1375 if (rc < 0) {
1376 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1377 return rc;
1378 }
1379
1380 mdelay(1);
1381 }
1382 return 0;
1383 }
1384
1385 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1386 {
1387 unsigned int timeout;
1388 unsigned int temp;
1389 int ret;
1390
1391 /*
1392 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1393 * are initialized in a Energy Detect Power-Down mode that prevents
1394 * the MAC chip to be software reseted. So we have to wakeup the PHY
1395 * before.
1396 */
1397 if (pdata->generation == 4) {
1398 ret = smsc911x_phy_disable_energy_detect(pdata);
1399
1400 if (ret) {
1401 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1402 return ret;
1403 }
1404 }
1405
1406 /* Reset the LAN911x */
1407 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1408 timeout = 10;
1409 do {
1410 udelay(10);
1411 temp = smsc911x_reg_read(pdata, HW_CFG);
1412 } while ((--timeout) && (temp & HW_CFG_SRST_));
1413
1414 if (unlikely(temp & HW_CFG_SRST_)) {
1415 SMSC_WARN(pdata, drv, "Failed to complete reset");
1416 return -EIO;
1417 }
1418
1419 if (pdata->generation == 4) {
1420 ret = smsc911x_phy_enable_energy_detect(pdata);
1421
1422 if (ret) {
1423 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1424 return ret;
1425 }
1426 }
1427
1428 return 0;
1429 }
1430
1431 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1432 static void
1433 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1434 {
1435 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1436 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1437 (dev_addr[1] << 8) | dev_addr[0];
1438
1439 SMSC_ASSERT_MAC_LOCK(pdata);
1440
1441 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1442 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1443 }
1444
1445 static int smsc911x_open(struct net_device *dev)
1446 {
1447 struct smsc911x_data *pdata = netdev_priv(dev);
1448 unsigned int timeout;
1449 unsigned int temp;
1450 unsigned int intcfg;
1451
1452 /* if the phy is not yet registered, retry later*/
1453 if (!pdata->phy_dev) {
1454 SMSC_WARN(pdata, hw, "phy_dev is NULL");
1455 return -EAGAIN;
1456 }
1457
1458 if (!is_valid_ether_addr(dev->dev_addr)) {
1459 SMSC_WARN(pdata, hw, "dev_addr is not a valid MAC address");
1460 return -EADDRNOTAVAIL;
1461 }
1462
1463 /* Reset the LAN911x */
1464 if (smsc911x_soft_reset(pdata)) {
1465 SMSC_WARN(pdata, hw, "soft reset failed");
1466 return -EIO;
1467 }
1468
1469 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1470 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1471
1472 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1473 spin_lock_irq(&pdata->mac_lock);
1474 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1475 spin_unlock_irq(&pdata->mac_lock);
1476
1477 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1478 timeout = 50;
1479 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1480 --timeout) {
1481 udelay(10);
1482 }
1483
1484 if (unlikely(timeout == 0))
1485 SMSC_WARN(pdata, ifup,
1486 "Timed out waiting for EEPROM busy bit to clear");
1487
1488 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1489
1490 /* The soft reset above cleared the device's MAC address,
1491 * restore it from local copy (set in probe) */
1492 spin_lock_irq(&pdata->mac_lock);
1493 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1494 spin_unlock_irq(&pdata->mac_lock);
1495
1496 /* Initialise irqs, but leave all sources disabled */
1497 smsc911x_reg_write(pdata, INT_EN, 0);
1498 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1499
1500 /* Set interrupt deassertion to 100uS */
1501 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1502
1503 if (pdata->config.irq_polarity) {
1504 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1505 intcfg |= INT_CFG_IRQ_POL_;
1506 } else {
1507 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1508 }
1509
1510 if (pdata->config.irq_type) {
1511 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1512 intcfg |= INT_CFG_IRQ_TYPE_;
1513 } else {
1514 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1515 }
1516
1517 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1518
1519 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1520 pdata->software_irq_signal = 0;
1521 smp_wmb();
1522
1523 temp = smsc911x_reg_read(pdata, INT_EN);
1524 temp |= INT_EN_SW_INT_EN_;
1525 smsc911x_reg_write(pdata, INT_EN, temp);
1526
1527 timeout = 1000;
1528 while (timeout--) {
1529 if (pdata->software_irq_signal)
1530 break;
1531 msleep(1);
1532 }
1533
1534 if (!pdata->software_irq_signal) {
1535 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1536 dev->irq);
1537 return -ENODEV;
1538 }
1539 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1540 dev->irq);
1541
1542 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1543 (unsigned long)pdata->ioaddr, dev->irq);
1544
1545 /* Reset the last known duplex and carrier */
1546 pdata->last_duplex = -1;
1547 pdata->last_carrier = -1;
1548
1549 /* Bring the PHY up */
1550 phy_start(pdata->phy_dev);
1551
1552 temp = smsc911x_reg_read(pdata, HW_CFG);
1553 /* Preserve TX FIFO size and external PHY configuration */
1554 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1555 temp |= HW_CFG_SF_;
1556 smsc911x_reg_write(pdata, HW_CFG, temp);
1557
1558 temp = smsc911x_reg_read(pdata, FIFO_INT);
1559 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1560 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1561 smsc911x_reg_write(pdata, FIFO_INT, temp);
1562
1563 /* set RX Data offset to 2 bytes for alignment */
1564 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1565
1566 /* enable NAPI polling before enabling RX interrupts */
1567 napi_enable(&pdata->napi);
1568
1569 temp = smsc911x_reg_read(pdata, INT_EN);
1570 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1571 smsc911x_reg_write(pdata, INT_EN, temp);
1572
1573 spin_lock_irq(&pdata->mac_lock);
1574 temp = smsc911x_mac_read(pdata, MAC_CR);
1575 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1576 smsc911x_mac_write(pdata, MAC_CR, temp);
1577 spin_unlock_irq(&pdata->mac_lock);
1578
1579 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1580
1581 netif_start_queue(dev);
1582 return 0;
1583 }
1584
1585 /* Entry point for stopping the interface */
1586 static int smsc911x_stop(struct net_device *dev)
1587 {
1588 struct smsc911x_data *pdata = netdev_priv(dev);
1589 unsigned int temp;
1590
1591 /* Disable all device interrupts */
1592 temp = smsc911x_reg_read(pdata, INT_CFG);
1593 temp &= ~INT_CFG_IRQ_EN_;
1594 smsc911x_reg_write(pdata, INT_CFG, temp);
1595
1596 /* Stop Tx and Rx polling */
1597 netif_stop_queue(dev);
1598 napi_disable(&pdata->napi);
1599
1600 /* At this point all Rx and Tx activity is stopped */
1601 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1602 smsc911x_tx_update_txcounters(dev);
1603
1604 /* Bring the PHY down */
1605 if (pdata->phy_dev)
1606 phy_stop(pdata->phy_dev);
1607
1608 SMSC_TRACE(pdata, ifdown, "Interface stopped");
1609 return 0;
1610 }
1611
1612 /* Entry point for transmitting a packet */
1613 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1614 {
1615 struct smsc911x_data *pdata = netdev_priv(dev);
1616 unsigned int freespace;
1617 unsigned int tx_cmd_a;
1618 unsigned int tx_cmd_b;
1619 unsigned int temp;
1620 u32 wrsz;
1621 ulong bufp;
1622
1623 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1624
1625 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1626 SMSC_WARN(pdata, tx_err,
1627 "Tx data fifo low, space available: %d", freespace);
1628
1629 /* Word alignment adjustment */
1630 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1631 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1632 tx_cmd_a |= (unsigned int)skb->len;
1633
1634 tx_cmd_b = ((unsigned int)skb->len) << 16;
1635 tx_cmd_b |= (unsigned int)skb->len;
1636
1637 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1638 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1639
1640 bufp = (ulong)skb->data & (~0x3);
1641 wrsz = (u32)skb->len + 3;
1642 wrsz += (u32)((ulong)skb->data & 0x3);
1643 wrsz >>= 2;
1644
1645 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1646 freespace -= (skb->len + 32);
1647 skb_tx_timestamp(skb);
1648 dev_kfree_skb(skb);
1649
1650 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1651 smsc911x_tx_update_txcounters(dev);
1652
1653 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1654 netif_stop_queue(dev);
1655 temp = smsc911x_reg_read(pdata, FIFO_INT);
1656 temp &= 0x00FFFFFF;
1657 temp |= 0x32000000;
1658 smsc911x_reg_write(pdata, FIFO_INT, temp);
1659 }
1660
1661 return NETDEV_TX_OK;
1662 }
1663
1664 /* Entry point for getting status counters */
1665 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1666 {
1667 struct smsc911x_data *pdata = netdev_priv(dev);
1668 smsc911x_tx_update_txcounters(dev);
1669 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1670 return &dev->stats;
1671 }
1672
1673 /* Entry point for setting addressing modes */
1674 static void smsc911x_set_multicast_list(struct net_device *dev)
1675 {
1676 struct smsc911x_data *pdata = netdev_priv(dev);
1677 unsigned long flags;
1678
1679 if (dev->flags & IFF_PROMISC) {
1680 /* Enabling promiscuous mode */
1681 pdata->set_bits_mask = MAC_CR_PRMS_;
1682 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1683 pdata->hashhi = 0;
1684 pdata->hashlo = 0;
1685 } else if (dev->flags & IFF_ALLMULTI) {
1686 /* Enabling all multicast mode */
1687 pdata->set_bits_mask = MAC_CR_MCPAS_;
1688 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1689 pdata->hashhi = 0;
1690 pdata->hashlo = 0;
1691 } else if (!netdev_mc_empty(dev)) {
1692 /* Enabling specific multicast addresses */
1693 unsigned int hash_high = 0;
1694 unsigned int hash_low = 0;
1695 struct netdev_hw_addr *ha;
1696
1697 pdata->set_bits_mask = MAC_CR_HPFILT_;
1698 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1699
1700 netdev_for_each_mc_addr(ha, dev) {
1701 unsigned int bitnum = smsc911x_hash(ha->addr);
1702 unsigned int mask = 0x01 << (bitnum & 0x1F);
1703
1704 if (bitnum & 0x20)
1705 hash_high |= mask;
1706 else
1707 hash_low |= mask;
1708 }
1709
1710 pdata->hashhi = hash_high;
1711 pdata->hashlo = hash_low;
1712 } else {
1713 /* Enabling local MAC address only */
1714 pdata->set_bits_mask = 0;
1715 pdata->clear_bits_mask =
1716 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1717 pdata->hashhi = 0;
1718 pdata->hashlo = 0;
1719 }
1720
1721 spin_lock_irqsave(&pdata->mac_lock, flags);
1722
1723 if (pdata->generation <= 1) {
1724 /* Older hardware revision - cannot change these flags while
1725 * receiving data */
1726 if (!pdata->multicast_update_pending) {
1727 unsigned int temp;
1728 SMSC_TRACE(pdata, hw, "scheduling mcast update");
1729 pdata->multicast_update_pending = 1;
1730
1731 /* Request the hardware to stop, then perform the
1732 * update when we get an RX_STOP interrupt */
1733 temp = smsc911x_mac_read(pdata, MAC_CR);
1734 temp &= ~(MAC_CR_RXEN_);
1735 smsc911x_mac_write(pdata, MAC_CR, temp);
1736 } else {
1737 /* There is another update pending, this should now
1738 * use the newer values */
1739 }
1740 } else {
1741 /* Newer hardware revision - can write immediately */
1742 smsc911x_rx_multicast_update(pdata);
1743 }
1744
1745 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1746 }
1747
1748 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1749 {
1750 struct net_device *dev = dev_id;
1751 struct smsc911x_data *pdata = netdev_priv(dev);
1752 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1753 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1754 int serviced = IRQ_NONE;
1755 u32 temp;
1756
1757 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1758 temp = smsc911x_reg_read(pdata, INT_EN);
1759 temp &= (~INT_EN_SW_INT_EN_);
1760 smsc911x_reg_write(pdata, INT_EN, temp);
1761 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1762 pdata->software_irq_signal = 1;
1763 smp_wmb();
1764 serviced = IRQ_HANDLED;
1765 }
1766
1767 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1768 /* Called when there is a multicast update scheduled and
1769 * it is now safe to complete the update */
1770 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1771 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1772 if (pdata->multicast_update_pending)
1773 smsc911x_rx_multicast_update_workaround(pdata);
1774 serviced = IRQ_HANDLED;
1775 }
1776
1777 if (intsts & inten & INT_STS_TDFA_) {
1778 temp = smsc911x_reg_read(pdata, FIFO_INT);
1779 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1780 smsc911x_reg_write(pdata, FIFO_INT, temp);
1781 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1782 netif_wake_queue(dev);
1783 serviced = IRQ_HANDLED;
1784 }
1785
1786 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1787 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1788 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1789 serviced = IRQ_HANDLED;
1790 }
1791
1792 if (likely(intsts & inten & INT_STS_RSFL_)) {
1793 if (likely(napi_schedule_prep(&pdata->napi))) {
1794 /* Disable Rx interrupts */
1795 temp = smsc911x_reg_read(pdata, INT_EN);
1796 temp &= (~INT_EN_RSFL_EN_);
1797 smsc911x_reg_write(pdata, INT_EN, temp);
1798 /* Schedule a NAPI poll */
1799 __napi_schedule(&pdata->napi);
1800 } else {
1801 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1802 }
1803 serviced = IRQ_HANDLED;
1804 }
1805
1806 return serviced;
1807 }
1808
1809 #ifdef CONFIG_NET_POLL_CONTROLLER
1810 static void smsc911x_poll_controller(struct net_device *dev)
1811 {
1812 disable_irq(dev->irq);
1813 smsc911x_irqhandler(0, dev);
1814 enable_irq(dev->irq);
1815 }
1816 #endif /* CONFIG_NET_POLL_CONTROLLER */
1817
1818 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1819 {
1820 struct smsc911x_data *pdata = netdev_priv(dev);
1821 struct sockaddr *addr = p;
1822
1823 /* On older hardware revisions we cannot change the mac address
1824 * registers while receiving data. Newer devices can safely change
1825 * this at any time. */
1826 if (pdata->generation <= 1 && netif_running(dev))
1827 return -EBUSY;
1828
1829 if (!is_valid_ether_addr(addr->sa_data))
1830 return -EADDRNOTAVAIL;
1831
1832 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1833
1834 spin_lock_irq(&pdata->mac_lock);
1835 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1836 spin_unlock_irq(&pdata->mac_lock);
1837
1838 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1839
1840 return 0;
1841 }
1842
1843 /* Standard ioctls for mii-tool */
1844 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1845 {
1846 struct smsc911x_data *pdata = netdev_priv(dev);
1847
1848 if (!netif_running(dev) || !pdata->phy_dev)
1849 return -EINVAL;
1850
1851 return phy_mii_ioctl(pdata->phy_dev, ifr, cmd);
1852 }
1853
1854 static int
1855 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1856 {
1857 struct smsc911x_data *pdata = netdev_priv(dev);
1858
1859 cmd->maxtxpkt = 1;
1860 cmd->maxrxpkt = 1;
1861 return phy_ethtool_gset(pdata->phy_dev, cmd);
1862 }
1863
1864 static int
1865 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1866 {
1867 struct smsc911x_data *pdata = netdev_priv(dev);
1868
1869 return phy_ethtool_sset(pdata->phy_dev, cmd);
1870 }
1871
1872 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1873 struct ethtool_drvinfo *info)
1874 {
1875 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1876 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1877 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1878 sizeof(info->bus_info));
1879 }
1880
1881 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1882 {
1883 struct smsc911x_data *pdata = netdev_priv(dev);
1884
1885 return phy_start_aneg(pdata->phy_dev);
1886 }
1887
1888 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1889 {
1890 struct smsc911x_data *pdata = netdev_priv(dev);
1891 return pdata->msg_enable;
1892 }
1893
1894 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1895 {
1896 struct smsc911x_data *pdata = netdev_priv(dev);
1897 pdata->msg_enable = level;
1898 }
1899
1900 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1901 {
1902 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1903 sizeof(u32);
1904 }
1905
1906 static void
1907 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1908 void *buf)
1909 {
1910 struct smsc911x_data *pdata = netdev_priv(dev);
1911 struct phy_device *phy_dev = pdata->phy_dev;
1912 unsigned long flags;
1913 unsigned int i;
1914 unsigned int j = 0;
1915 u32 *data = buf;
1916
1917 regs->version = pdata->idrev;
1918 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1919 data[j++] = smsc911x_reg_read(pdata, i);
1920
1921 for (i = MAC_CR; i <= WUCSR; i++) {
1922 spin_lock_irqsave(&pdata->mac_lock, flags);
1923 data[j++] = smsc911x_mac_read(pdata, i);
1924 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1925 }
1926
1927 for (i = 0; i <= 31; i++)
1928 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
1929 }
1930
1931 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
1932 {
1933 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
1934 temp &= ~GPIO_CFG_EEPR_EN_;
1935 smsc911x_reg_write(pdata, GPIO_CFG, temp);
1936 msleep(1);
1937 }
1938
1939 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
1940 {
1941 int timeout = 100;
1942 u32 e2cmd;
1943
1944 SMSC_TRACE(pdata, drv, "op 0x%08x", op);
1945 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
1946 SMSC_WARN(pdata, drv, "Busy at start");
1947 return -EBUSY;
1948 }
1949
1950 e2cmd = op | E2P_CMD_EPC_BUSY_;
1951 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
1952
1953 do {
1954 msleep(1);
1955 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
1956 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
1957
1958 if (!timeout) {
1959 SMSC_TRACE(pdata, drv, "TIMED OUT");
1960 return -EAGAIN;
1961 }
1962
1963 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
1964 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
1965 return -EINVAL;
1966 }
1967
1968 return 0;
1969 }
1970
1971 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
1972 u8 address, u8 *data)
1973 {
1974 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
1975 int ret;
1976
1977 SMSC_TRACE(pdata, drv, "address 0x%x", address);
1978 ret = smsc911x_eeprom_send_cmd(pdata, op);
1979
1980 if (!ret)
1981 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
1982
1983 return ret;
1984 }
1985
1986 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
1987 u8 address, u8 data)
1988 {
1989 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
1990 u32 temp;
1991 int ret;
1992
1993 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
1994 ret = smsc911x_eeprom_send_cmd(pdata, op);
1995
1996 if (!ret) {
1997 op = E2P_CMD_EPC_CMD_WRITE_ | address;
1998 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
1999
2000 /* Workaround for hardware read-after-write restriction */
2001 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2002
2003 ret = smsc911x_eeprom_send_cmd(pdata, op);
2004 }
2005
2006 return ret;
2007 }
2008
2009 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2010 {
2011 return SMSC911X_EEPROM_SIZE;
2012 }
2013
2014 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2015 struct ethtool_eeprom *eeprom, u8 *data)
2016 {
2017 struct smsc911x_data *pdata = netdev_priv(dev);
2018 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2019 int len;
2020 int i;
2021
2022 smsc911x_eeprom_enable_access(pdata);
2023
2024 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2025 for (i = 0; i < len; i++) {
2026 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2027 if (ret < 0) {
2028 eeprom->len = 0;
2029 return ret;
2030 }
2031 }
2032
2033 memcpy(data, &eeprom_data[eeprom->offset], len);
2034 eeprom->len = len;
2035 return 0;
2036 }
2037
2038 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2039 struct ethtool_eeprom *eeprom, u8 *data)
2040 {
2041 int ret;
2042 struct smsc911x_data *pdata = netdev_priv(dev);
2043
2044 smsc911x_eeprom_enable_access(pdata);
2045 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2046 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2047 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2048
2049 /* Single byte write, according to man page */
2050 eeprom->len = 1;
2051
2052 return ret;
2053 }
2054
2055 static const struct ethtool_ops smsc911x_ethtool_ops = {
2056 .get_settings = smsc911x_ethtool_getsettings,
2057 .set_settings = smsc911x_ethtool_setsettings,
2058 .get_link = ethtool_op_get_link,
2059 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2060 .nway_reset = smsc911x_ethtool_nwayreset,
2061 .get_msglevel = smsc911x_ethtool_getmsglevel,
2062 .set_msglevel = smsc911x_ethtool_setmsglevel,
2063 .get_regs_len = smsc911x_ethtool_getregslen,
2064 .get_regs = smsc911x_ethtool_getregs,
2065 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2066 .get_eeprom = smsc911x_ethtool_get_eeprom,
2067 .set_eeprom = smsc911x_ethtool_set_eeprom,
2068 };
2069
2070 static const struct net_device_ops smsc911x_netdev_ops = {
2071 .ndo_open = smsc911x_open,
2072 .ndo_stop = smsc911x_stop,
2073 .ndo_start_xmit = smsc911x_hard_start_xmit,
2074 .ndo_get_stats = smsc911x_get_stats,
2075 .ndo_set_rx_mode = smsc911x_set_multicast_list,
2076 .ndo_do_ioctl = smsc911x_do_ioctl,
2077 .ndo_change_mtu = eth_change_mtu,
2078 .ndo_validate_addr = eth_validate_addr,
2079 .ndo_set_mac_address = smsc911x_set_mac_address,
2080 #ifdef CONFIG_NET_POLL_CONTROLLER
2081 .ndo_poll_controller = smsc911x_poll_controller,
2082 #endif
2083 };
2084
2085 /* copies the current mac address from hardware to dev->dev_addr */
2086 static void __devinit smsc911x_read_mac_address(struct net_device *dev)
2087 {
2088 struct smsc911x_data *pdata = netdev_priv(dev);
2089 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2090 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2091
2092 dev->dev_addr[0] = (u8)(mac_low32);
2093 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2094 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2095 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2096 dev->dev_addr[4] = (u8)(mac_high16);
2097 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2098 }
2099
2100 /* Initializing private device structures, only called from probe */
2101 static int __devinit smsc911x_init(struct net_device *dev)
2102 {
2103 struct smsc911x_data *pdata = netdev_priv(dev);
2104 unsigned int byte_test;
2105 unsigned int to = 100;
2106
2107 SMSC_TRACE(pdata, probe, "Driver Parameters:");
2108 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2109 (unsigned long)pdata->ioaddr);
2110 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2111 SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2112
2113 spin_lock_init(&pdata->dev_lock);
2114 spin_lock_init(&pdata->mac_lock);
2115
2116 if (pdata->ioaddr == 0) {
2117 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2118 return -ENODEV;
2119 }
2120
2121 /*
2122 * poll the READY bit in PMT_CTRL. Any other access to the device is
2123 * forbidden while this bit isn't set. Try for 100ms
2124 */
2125 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2126 udelay(1000);
2127 if (to == 0) {
2128 pr_err("Device not READY in 100ms aborting\n");
2129 return -ENODEV;
2130 }
2131
2132 /* Check byte ordering */
2133 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2134 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2135 if (byte_test == 0x43218765) {
2136 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2137 "applying WORD_SWAP");
2138 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2139
2140 /* 1 dummy read of BYTE_TEST is needed after a write to
2141 * WORD_SWAP before its contents are valid */
2142 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2143
2144 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2145 }
2146
2147 if (byte_test != 0x87654321) {
2148 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2149 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2150 SMSC_WARN(pdata, probe,
2151 "top 16 bits equal to bottom 16 bits");
2152 SMSC_TRACE(pdata, probe,
2153 "This may mean the chip is set "
2154 "for 32 bit while the bus is reading 16 bit");
2155 }
2156 return -ENODEV;
2157 }
2158
2159 /* Default generation to zero (all workarounds apply) */
2160 pdata->generation = 0;
2161
2162 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2163 switch (pdata->idrev & 0xFFFF0000) {
2164 case 0x01180000:
2165 case 0x01170000:
2166 case 0x01160000:
2167 case 0x01150000:
2168 case 0x218A0000:
2169 /* LAN911[5678] family */
2170 pdata->generation = pdata->idrev & 0x0000FFFF;
2171 break;
2172
2173 case 0x118A0000:
2174 case 0x117A0000:
2175 case 0x116A0000:
2176 case 0x115A0000:
2177 /* LAN921[5678] family */
2178 pdata->generation = 3;
2179 break;
2180
2181 case 0x92100000:
2182 case 0x92110000:
2183 case 0x92200000:
2184 case 0x92210000:
2185 /* LAN9210/LAN9211/LAN9220/LAN9221 */
2186 pdata->generation = 4;
2187 break;
2188
2189 default:
2190 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2191 pdata->idrev);
2192 return -ENODEV;
2193 }
2194
2195 SMSC_TRACE(pdata, probe,
2196 "LAN911x identified, idrev: 0x%08X, generation: %d",
2197 pdata->idrev, pdata->generation);
2198
2199 if (pdata->generation == 0)
2200 SMSC_WARN(pdata, probe,
2201 "This driver is not intended for this chip revision");
2202
2203 /* workaround for platforms without an eeprom, where the mac address
2204 * is stored elsewhere and set by the bootloader. This saves the
2205 * mac address before resetting the device */
2206 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2207 spin_lock_irq(&pdata->mac_lock);
2208 smsc911x_read_mac_address(dev);
2209 spin_unlock_irq(&pdata->mac_lock);
2210 }
2211
2212 /* Reset the LAN911x */
2213 if (smsc911x_soft_reset(pdata))
2214 return -ENODEV;
2215
2216 /* Disable all interrupt sources until we bring the device up */
2217 smsc911x_reg_write(pdata, INT_EN, 0);
2218
2219 ether_setup(dev);
2220 dev->flags |= IFF_MULTICAST;
2221 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2222 dev->netdev_ops = &smsc911x_netdev_ops;
2223 dev->ethtool_ops = &smsc911x_ethtool_ops;
2224
2225 return 0;
2226 }
2227
2228 static int __devexit smsc911x_drv_remove(struct platform_device *pdev)
2229 {
2230 struct net_device *dev;
2231 struct smsc911x_data *pdata;
2232 struct resource *res;
2233
2234 dev = platform_get_drvdata(pdev);
2235 BUG_ON(!dev);
2236 pdata = netdev_priv(dev);
2237 BUG_ON(!pdata);
2238 BUG_ON(!pdata->ioaddr);
2239 BUG_ON(!pdata->phy_dev);
2240
2241 SMSC_TRACE(pdata, ifdown, "Stopping driver");
2242
2243 phy_disconnect(pdata->phy_dev);
2244 pdata->phy_dev = NULL;
2245 mdiobus_unregister(pdata->mii_bus);
2246 mdiobus_free(pdata->mii_bus);
2247
2248 platform_set_drvdata(pdev, NULL);
2249 unregister_netdev(dev);
2250 free_irq(dev->irq, dev);
2251 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2252 "smsc911x-memory");
2253 if (!res)
2254 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2255
2256 release_mem_region(res->start, resource_size(res));
2257
2258 iounmap(pdata->ioaddr);
2259
2260 (void)smsc911x_disable_resources(pdev);
2261 smsc911x_free_resources(pdev);
2262
2263 free_netdev(dev);
2264
2265 return 0;
2266 }
2267
2268 /* standard register acces */
2269 static const struct smsc911x_ops standard_smsc911x_ops = {
2270 .reg_read = __smsc911x_reg_read,
2271 .reg_write = __smsc911x_reg_write,
2272 .rx_readfifo = smsc911x_rx_readfifo,
2273 .tx_writefifo = smsc911x_tx_writefifo,
2274 };
2275
2276 /* shifted register access */
2277 static const struct smsc911x_ops shifted_smsc911x_ops = {
2278 .reg_read = __smsc911x_reg_read_shift,
2279 .reg_write = __smsc911x_reg_write_shift,
2280 .rx_readfifo = smsc911x_rx_readfifo_shift,
2281 .tx_writefifo = smsc911x_tx_writefifo_shift,
2282 };
2283
2284 #ifdef CONFIG_OF
2285 static int __devinit smsc911x_probe_config_dt(
2286 struct smsc911x_platform_config *config,
2287 struct device_node *np)
2288 {
2289 const char *mac;
2290 u32 width = 0;
2291
2292 if (!np)
2293 return -ENODEV;
2294
2295 config->phy_interface = of_get_phy_mode(np);
2296
2297 mac = of_get_mac_address(np);
2298 if (mac)
2299 memcpy(config->mac, mac, ETH_ALEN);
2300
2301 of_property_read_u32(np, "reg-shift", &config->shift);
2302
2303 of_property_read_u32(np, "reg-io-width", &width);
2304 if (width == 4)
2305 config->flags |= SMSC911X_USE_32BIT;
2306 else
2307 config->flags |= SMSC911X_USE_16BIT;
2308
2309 if (of_get_property(np, "smsc,irq-active-high", NULL))
2310 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2311
2312 if (of_get_property(np, "smsc,irq-push-pull", NULL))
2313 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2314
2315 if (of_get_property(np, "smsc,force-internal-phy", NULL))
2316 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2317
2318 if (of_get_property(np, "smsc,force-external-phy", NULL))
2319 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2320
2321 if (of_get_property(np, "smsc,save-mac-address", NULL))
2322 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2323
2324 return 0;
2325 }
2326 #else
2327 static inline int smsc911x_probe_config_dt(
2328 struct smsc911x_platform_config *config,
2329 struct device_node *np)
2330 {
2331 return -ENODEV;
2332 }
2333 #endif /* CONFIG_OF */
2334
2335 static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
2336 {
2337 struct device_node *np = pdev->dev.of_node;
2338 struct net_device *dev;
2339 struct smsc911x_data *pdata;
2340 struct smsc911x_platform_config *config = pdev->dev.platform_data;
2341 struct resource *res, *irq_res;
2342 unsigned int intcfg = 0;
2343 int res_size, irq_flags;
2344 int retval;
2345
2346 pr_info("Driver version %s\n", SMSC_DRV_VERSION);
2347
2348 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2349 "smsc911x-memory");
2350 if (!res)
2351 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2352 if (!res) {
2353 pr_warn("Could not allocate resource\n");
2354 retval = -ENODEV;
2355 goto out_0;
2356 }
2357 res_size = resource_size(res);
2358
2359 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2360 if (!irq_res) {
2361 pr_warn("Could not allocate irq resource\n");
2362 retval = -ENODEV;
2363 goto out_0;
2364 }
2365
2366 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2367 retval = -EBUSY;
2368 goto out_0;
2369 }
2370
2371 dev = alloc_etherdev(sizeof(struct smsc911x_data));
2372 if (!dev) {
2373 pr_warn("Could not allocate device\n");
2374 retval = -ENOMEM;
2375 goto out_release_io_1;
2376 }
2377
2378 SET_NETDEV_DEV(dev, &pdev->dev);
2379
2380 pdata = netdev_priv(dev);
2381
2382 dev->irq = irq_res->start;
2383 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
2384 pdata->ioaddr = ioremap_nocache(res->start, res_size);
2385
2386 pdata->dev = dev;
2387 pdata->msg_enable = ((1 << debug) - 1);
2388
2389 platform_set_drvdata(pdev, dev);
2390
2391 retval = smsc911x_request_resources(pdev);
2392 if (retval)
2393 goto out_return_resources;
2394
2395 retval = smsc911x_enable_resources(pdev);
2396 if (retval)
2397 goto out_disable_resources;
2398
2399 if (pdata->ioaddr == NULL) {
2400 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2401 retval = -ENOMEM;
2402 goto out_disable_resources;
2403 }
2404
2405 retval = smsc911x_probe_config_dt(&pdata->config, np);
2406 if (retval && config) {
2407 /* copy config parameters across to pdata */
2408 memcpy(&pdata->config, config, sizeof(pdata->config));
2409 retval = 0;
2410 }
2411
2412 if (retval) {
2413 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2414 goto out_disable_resources;
2415 }
2416
2417 /* assume standard, non-shifted, access to HW registers */
2418 pdata->ops = &standard_smsc911x_ops;
2419 /* apply the right access if shifting is needed */
2420 if (pdata->config.shift)
2421 pdata->ops = &shifted_smsc911x_ops;
2422
2423 retval = smsc911x_init(dev);
2424 if (retval < 0)
2425 goto out_disable_resources;
2426
2427 /* configure irq polarity and type before connecting isr */
2428 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
2429 intcfg |= INT_CFG_IRQ_POL_;
2430
2431 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
2432 intcfg |= INT_CFG_IRQ_TYPE_;
2433
2434 smsc911x_reg_write(pdata, INT_CFG, intcfg);
2435
2436 /* Ensure interrupts are globally disabled before connecting ISR */
2437 smsc911x_reg_write(pdata, INT_EN, 0);
2438 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
2439
2440 retval = request_irq(dev->irq, smsc911x_irqhandler,
2441 irq_flags | IRQF_SHARED, dev->name, dev);
2442 if (retval) {
2443 SMSC_WARN(pdata, probe,
2444 "Unable to claim requested irq: %d", dev->irq);
2445 goto out_free_irq;
2446 }
2447
2448 retval = register_netdev(dev);
2449 if (retval) {
2450 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2451 goto out_free_irq;
2452 } else {
2453 SMSC_TRACE(pdata, probe,
2454 "Network interface: \"%s\"", dev->name);
2455 }
2456
2457 retval = smsc911x_mii_init(pdev, dev);
2458 if (retval) {
2459 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2460 goto out_unregister_netdev_5;
2461 }
2462
2463 spin_lock_irq(&pdata->mac_lock);
2464
2465 /* Check if mac address has been specified when bringing interface up */
2466 if (is_valid_ether_addr(dev->dev_addr)) {
2467 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2468 SMSC_TRACE(pdata, probe,
2469 "MAC Address is specified by configuration");
2470 } else if (is_valid_ether_addr(pdata->config.mac)) {
2471 memcpy(dev->dev_addr, pdata->config.mac, 6);
2472 SMSC_TRACE(pdata, probe,
2473 "MAC Address specified by platform data");
2474 } else {
2475 /* Try reading mac address from device. if EEPROM is present
2476 * it will already have been set */
2477 smsc_get_mac(dev);
2478
2479 if (is_valid_ether_addr(dev->dev_addr)) {
2480 /* eeprom values are valid so use them */
2481 SMSC_TRACE(pdata, probe,
2482 "Mac Address is read from LAN911x EEPROM");
2483 } else {
2484 /* eeprom values are invalid, generate random MAC */
2485 random_ether_addr(dev->dev_addr);
2486 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2487 SMSC_TRACE(pdata, probe,
2488 "MAC Address is set to random_ether_addr");
2489 }
2490 }
2491
2492 spin_unlock_irq(&pdata->mac_lock);
2493
2494 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2495
2496 return 0;
2497
2498 out_unregister_netdev_5:
2499 unregister_netdev(dev);
2500 out_free_irq:
2501 free_irq(dev->irq, dev);
2502 out_disable_resources:
2503 (void)smsc911x_disable_resources(pdev);
2504 out_return_resources:
2505 smsc911x_free_resources(pdev);
2506 platform_set_drvdata(pdev, NULL);
2507 iounmap(pdata->ioaddr);
2508 free_netdev(dev);
2509 out_release_io_1:
2510 release_mem_region(res->start, resource_size(res));
2511 out_0:
2512 return retval;
2513 }
2514
2515 #ifdef CONFIG_PM
2516 /* This implementation assumes the devices remains powered on its VDDVARIO
2517 * pins during suspend. */
2518
2519 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2520
2521 static int smsc911x_suspend(struct device *dev)
2522 {
2523 struct net_device *ndev = dev_get_drvdata(dev);
2524 struct smsc911x_data *pdata = netdev_priv(ndev);
2525
2526 /* enable wake on LAN, energy detection and the external PME
2527 * signal. */
2528 smsc911x_reg_write(pdata, PMT_CTRL,
2529 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2530 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2531
2532 return 0;
2533 }
2534
2535 static int smsc911x_resume(struct device *dev)
2536 {
2537 struct net_device *ndev = dev_get_drvdata(dev);
2538 struct smsc911x_data *pdata = netdev_priv(ndev);
2539 unsigned int to = 100;
2540
2541 /* Note 3.11 from the datasheet:
2542 * "When the LAN9220 is in a power saving state, a write of any
2543 * data to the BYTE_TEST register will wake-up the device."
2544 */
2545 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2546
2547 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2548 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2549 * if it failed. */
2550 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2551 udelay(1000);
2552
2553 return (to == 0) ? -EIO : 0;
2554 }
2555
2556 static const struct dev_pm_ops smsc911x_pm_ops = {
2557 .suspend = smsc911x_suspend,
2558 .resume = smsc911x_resume,
2559 };
2560
2561 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2562
2563 #else
2564 #define SMSC911X_PM_OPS NULL
2565 #endif
2566
2567 static const struct of_device_id smsc911x_dt_ids[] = {
2568 { .compatible = "smsc,lan9115", },
2569 { /* sentinel */ }
2570 };
2571 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2572
2573 static struct platform_driver smsc911x_driver = {
2574 .probe = smsc911x_drv_probe,
2575 .remove = __devexit_p(smsc911x_drv_remove),
2576 .driver = {
2577 .name = SMSC_CHIPNAME,
2578 .owner = THIS_MODULE,
2579 .pm = SMSC911X_PM_OPS,
2580 .of_match_table = smsc911x_dt_ids,
2581 },
2582 };
2583
2584 /* Entry point for loading the module */
2585 static int __init smsc911x_init_module(void)
2586 {
2587 SMSC_INITIALIZE();
2588 return platform_driver_register(&smsc911x_driver);
2589 }
2590
2591 /* entry point for unloading the module */
2592 static void __exit smsc911x_cleanup_module(void)
2593 {
2594 platform_driver_unregister(&smsc911x_driver);
2595 }
2596
2597 module_init(smsc911x_init_module);
2598 module_exit(smsc911x_cleanup_module);