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net: smsc911x: switch to new dev_pm_ops
[linux-2.6/btrfs-unstable.git] / drivers / net / smsc911x.c
blobc2667855a005a8099fc129cf264699e9b627eff4
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 *
30 */
31
32 #include <linux/crc32.h>
33 #include <linux/delay.h>
34 #include <linux/errno.h>
35 #include <linux/etherdevice.h>
36 #include <linux/ethtool.h>
37 #include <linux/init.h>
38 #include <linux/ioport.h>
39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/netdevice.h>
42 #include <linux/platform_device.h>
43 #include <linux/sched.h>
44 #include <linux/slab.h>
45 #include <linux/timer.h>
46 #include <linux/bug.h>
47 #include <linux/bitops.h>
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <linux/swab.h>
51 #include <linux/phy.h>
52 #include <linux/smsc911x.h>
53 #include <linux/device.h>
54 #include "smsc911x.h"
55
56 #define SMSC_CHIPNAME "smsc911x"
57 #define SMSC_MDIONAME "smsc911x-mdio"
58 #define SMSC_DRV_VERSION "2008-10-21"
59
60 MODULE_LICENSE("GPL");
61 MODULE_VERSION(SMSC_DRV_VERSION);
62
63 #if USE_DEBUG > 0
64 static int debug = 16;
65 #else
66 static int debug = 3;
67 #endif
68
69 module_param(debug, int, 0);
70 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
71
72 struct smsc911x_data {
73 void __iomem *ioaddr;
74
75 unsigned int idrev;
76
77 /* used to decide which workarounds apply */
78 unsigned int generation;
79
80 /* device configuration (copied from platform_data during probe) */
81 struct smsc911x_platform_config config;
82
83 /* This needs to be acquired before calling any of below:
84 * smsc911x_mac_read(), smsc911x_mac_write()
85 */
86 spinlock_t mac_lock;
87
88 /* spinlock to ensure 16-bit accesses are serialised.
89 * unused with a 32-bit bus */
90 spinlock_t dev_lock;
91
92 struct phy_device *phy_dev;
93 struct mii_bus *mii_bus;
94 int phy_irq[PHY_MAX_ADDR];
95 unsigned int using_extphy;
96 int last_duplex;
97 int last_carrier;
98
99 u32 msg_enable;
100 unsigned int gpio_setting;
101 unsigned int gpio_orig_setting;
102 struct net_device *dev;
103 struct napi_struct napi;
104
105 unsigned int software_irq_signal;
106
107 #ifdef USE_PHY_WORK_AROUND
108 #define MIN_PACKET_SIZE (64)
109 char loopback_tx_pkt[MIN_PACKET_SIZE];
110 char loopback_rx_pkt[MIN_PACKET_SIZE];
111 unsigned int resetcount;
112 #endif
113
114 /* Members for Multicast filter workaround */
115 unsigned int multicast_update_pending;
116 unsigned int set_bits_mask;
117 unsigned int clear_bits_mask;
118 unsigned int hashhi;
119 unsigned int hashlo;
120 };
121
122 /* The 16-bit access functions are significantly slower, due to the locking
123 * necessary. If your bus hardware can be configured to do this for you
124 * (in response to a single 32-bit operation from software), you should use
125 * the 32-bit access functions instead. */
126
127 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
128 {
129 if (pdata->config.flags & SMSC911X_USE_32BIT)
130 return readl(pdata->ioaddr + reg);
131
132 if (pdata->config.flags & SMSC911X_USE_16BIT) {
133 u32 data;
134 unsigned long flags;
135
136 /* these two 16-bit reads must be performed consecutively, so
137 * must not be interrupted by our own ISR (which would start
138 * another read operation) */
139 spin_lock_irqsave(&pdata->dev_lock, flags);
140 data = ((readw(pdata->ioaddr + reg) & 0xFFFF) |
141 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
142 spin_unlock_irqrestore(&pdata->dev_lock, flags);
143
144 return data;
145 }
146
147 BUG();
148 return 0;
149 }
150
151 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
152 u32 val)
153 {
154 if (pdata->config.flags & SMSC911X_USE_32BIT) {
155 writel(val, pdata->ioaddr + reg);
156 return;
157 }
158
159 if (pdata->config.flags & SMSC911X_USE_16BIT) {
160 unsigned long flags;
161
162 /* these two 16-bit writes must be performed consecutively, so
163 * must not be interrupted by our own ISR (which would start
164 * another read operation) */
165 spin_lock_irqsave(&pdata->dev_lock, flags);
166 writew(val & 0xFFFF, pdata->ioaddr + reg);
167 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
168 spin_unlock_irqrestore(&pdata->dev_lock, flags);
169 return;
170 }
171
172 BUG();
173 }
174
175 /* Writes a packet to the TX_DATA_FIFO */
176 static inline void
177 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
178 unsigned int wordcount)
179 {
180 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
181 while (wordcount--)
182 smsc911x_reg_write(pdata, TX_DATA_FIFO, swab32(*buf++));
183 return;
184 }
185
186 if (pdata->config.flags & SMSC911X_USE_32BIT) {
187 writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
188 return;
189 }
190
191 if (pdata->config.flags & SMSC911X_USE_16BIT) {
192 while (wordcount--)
193 smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
194 return;
195 }
196
197 BUG();
198 }
199
200 /* Reads a packet out of the RX_DATA_FIFO */
201 static inline void
202 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
203 unsigned int wordcount)
204 {
205 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
206 while (wordcount--)
207 *buf++ = swab32(smsc911x_reg_read(pdata, RX_DATA_FIFO));
208 return;
209 }
210
211 if (pdata->config.flags & SMSC911X_USE_32BIT) {
212 readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
213 return;
214 }
215
216 if (pdata->config.flags & SMSC911X_USE_16BIT) {
217 while (wordcount--)
218 *buf++ = smsc911x_reg_read(pdata, RX_DATA_FIFO);
219 return;
220 }
221
222 BUG();
223 }
224
225 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
226 * and smsc911x_mac_write, so assumes mac_lock is held */
227 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
228 {
229 int i;
230 u32 val;
231
232 SMSC_ASSERT_MAC_LOCK(pdata);
233
234 for (i = 0; i < 40; i++) {
235 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
236 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
237 return 0;
238 }
239 SMSC_WARNING(HW, "Timed out waiting for MAC not BUSY. "
240 "MAC_CSR_CMD: 0x%08X", val);
241 return -EIO;
242 }
243
244 /* Fetches a MAC register value. Assumes mac_lock is acquired */
245 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
246 {
247 unsigned int temp;
248
249 SMSC_ASSERT_MAC_LOCK(pdata);
250
251 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
252 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
253 SMSC_WARNING(HW, "MAC busy at entry");
254 return 0xFFFFFFFF;
255 }
256
257 /* Send the MAC cmd */
258 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
259 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
260
261 /* Workaround for hardware read-after-write restriction */
262 temp = smsc911x_reg_read(pdata, BYTE_TEST);
263
264 /* Wait for the read to complete */
265 if (likely(smsc911x_mac_complete(pdata) == 0))
266 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
267
268 SMSC_WARNING(HW, "MAC busy after read");
269 return 0xFFFFFFFF;
270 }
271
272 /* Set a mac register, mac_lock must be acquired before calling */
273 static void smsc911x_mac_write(struct smsc911x_data *pdata,
274 unsigned int offset, u32 val)
275 {
276 unsigned int temp;
277
278 SMSC_ASSERT_MAC_LOCK(pdata);
279
280 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
281 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
282 SMSC_WARNING(HW,
283 "smsc911x_mac_write failed, MAC busy at entry");
284 return;
285 }
286
287 /* Send data to write */
288 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
289
290 /* Write the actual data */
291 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
292 MAC_CSR_CMD_CSR_BUSY_));
293
294 /* Workaround for hardware read-after-write restriction */
295 temp = smsc911x_reg_read(pdata, BYTE_TEST);
296
297 /* Wait for the write to complete */
298 if (likely(smsc911x_mac_complete(pdata) == 0))
299 return;
300
301 SMSC_WARNING(HW,
302 "smsc911x_mac_write failed, MAC busy after write");
303 }
304
305 /* Get a phy register */
306 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
307 {
308 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
309 unsigned long flags;
310 unsigned int addr;
311 int i, reg;
312
313 spin_lock_irqsave(&pdata->mac_lock, flags);
314
315 /* Confirm MII not busy */
316 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
317 SMSC_WARNING(HW,
318 "MII is busy in smsc911x_mii_read???");
319 reg = -EIO;
320 goto out;
321 }
322
323 /* Set the address, index & direction (read from PHY) */
324 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
325 smsc911x_mac_write(pdata, MII_ACC, addr);
326
327 /* Wait for read to complete w/ timeout */
328 for (i = 0; i < 100; i++)
329 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
330 reg = smsc911x_mac_read(pdata, MII_DATA);
331 goto out;
332 }
333
334 SMSC_WARNING(HW, "Timed out waiting for MII read to finish");
335 reg = -EIO;
336
337 out:
338 spin_unlock_irqrestore(&pdata->mac_lock, flags);
339 return reg;
340 }
341
342 /* Set a phy register */
343 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
344 u16 val)
345 {
346 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
347 unsigned long flags;
348 unsigned int addr;
349 int i, reg;
350
351 spin_lock_irqsave(&pdata->mac_lock, flags);
352
353 /* Confirm MII not busy */
354 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
355 SMSC_WARNING(HW,
356 "MII is busy in smsc911x_mii_write???");
357 reg = -EIO;
358 goto out;
359 }
360
361 /* Put the data to write in the MAC */
362 smsc911x_mac_write(pdata, MII_DATA, val);
363
364 /* Set the address, index & direction (write to PHY) */
365 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
366 MII_ACC_MII_WRITE_;
367 smsc911x_mac_write(pdata, MII_ACC, addr);
368
369 /* Wait for write to complete w/ timeout */
370 for (i = 0; i < 100; i++)
371 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
372 reg = 0;
373 goto out;
374 }
375
376 SMSC_WARNING(HW, "Timed out waiting for MII write to finish");
377 reg = -EIO;
378
379 out:
380 spin_unlock_irqrestore(&pdata->mac_lock, flags);
381 return reg;
382 }
383
384 /* Switch to external phy. Assumes tx and rx are stopped. */
385 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
386 {
387 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
388
389 /* Disable phy clocks to the MAC */
390 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
391 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
392 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
393 udelay(10); /* Enough time for clocks to stop */
394
395 /* Switch to external phy */
396 hwcfg |= HW_CFG_EXT_PHY_EN_;
397 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
398
399 /* Enable phy clocks to the MAC */
400 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
401 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
402 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
403 udelay(10); /* Enough time for clocks to restart */
404
405 hwcfg |= HW_CFG_SMI_SEL_;
406 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
407 }
408
409 /* Autodetects and enables external phy if present on supported chips.
410 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
411 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
412 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
413 {
414 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
415
416 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
417 SMSC_TRACE(HW, "Forcing internal PHY");
418 pdata->using_extphy = 0;
419 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
420 SMSC_TRACE(HW, "Forcing external PHY");
421 smsc911x_phy_enable_external(pdata);
422 pdata->using_extphy = 1;
423 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
424 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET set, using external PHY");
425 smsc911x_phy_enable_external(pdata);
426 pdata->using_extphy = 1;
427 } else {
428 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET clear, using internal PHY");
429 pdata->using_extphy = 0;
430 }
431 }
432
433 /* Fetches a tx status out of the status fifo */
434 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
435 {
436 unsigned int result =
437 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
438
439 if (result != 0)
440 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
441
442 return result;
443 }
444
445 /* Fetches the next rx status */
446 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
447 {
448 unsigned int result =
449 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
450
451 if (result != 0)
452 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
453
454 return result;
455 }
456
457 #ifdef USE_PHY_WORK_AROUND
458 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
459 {
460 unsigned int tries;
461 u32 wrsz;
462 u32 rdsz;
463 ulong bufp;
464
465 for (tries = 0; tries < 10; tries++) {
466 unsigned int txcmd_a;
467 unsigned int txcmd_b;
468 unsigned int status;
469 unsigned int pktlength;
470 unsigned int i;
471
472 /* Zero-out rx packet memory */
473 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
474
475 /* Write tx packet to 118 */
476 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
477 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
478 txcmd_a |= MIN_PACKET_SIZE;
479
480 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
481
482 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
483 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
484
485 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
486 wrsz = MIN_PACKET_SIZE + 3;
487 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
488 wrsz >>= 2;
489
490 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
491
492 /* Wait till transmit is done */
493 i = 60;
494 do {
495 udelay(5);
496 status = smsc911x_tx_get_txstatus(pdata);
497 } while ((i--) && (!status));
498
499 if (!status) {
500 SMSC_WARNING(HW, "Failed to transmit "
501 "during loopback test");
502 continue;
503 }
504 if (status & TX_STS_ES_) {
505 SMSC_WARNING(HW, "Transmit encountered "
506 "errors during loopback test");
507 continue;
508 }
509
510 /* Wait till receive is done */
511 i = 60;
512 do {
513 udelay(5);
514 status = smsc911x_rx_get_rxstatus(pdata);
515 } while ((i--) && (!status));
516
517 if (!status) {
518 SMSC_WARNING(HW,
519 "Failed to receive during loopback test");
520 continue;
521 }
522 if (status & RX_STS_ES_) {
523 SMSC_WARNING(HW, "Receive encountered "
524 "errors during loopback test");
525 continue;
526 }
527
528 pktlength = ((status & 0x3FFF0000UL) >> 16);
529 bufp = (ulong)pdata->loopback_rx_pkt;
530 rdsz = pktlength + 3;
531 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
532 rdsz >>= 2;
533
534 smsc911x_rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
535
536 if (pktlength != (MIN_PACKET_SIZE + 4)) {
537 SMSC_WARNING(HW, "Unexpected packet size "
538 "during loop back test, size=%d, will retry",
539 pktlength);
540 } else {
541 unsigned int j;
542 int mismatch = 0;
543 for (j = 0; j < MIN_PACKET_SIZE; j++) {
544 if (pdata->loopback_tx_pkt[j]
545 != pdata->loopback_rx_pkt[j]) {
546 mismatch = 1;
547 break;
548 }
549 }
550 if (!mismatch) {
551 SMSC_TRACE(HW, "Successfully verified "
552 "loopback packet");
553 return 0;
554 } else {
555 SMSC_WARNING(HW, "Data mismatch "
556 "during loop back test, will retry");
557 }
558 }
559 }
560
561 return -EIO;
562 }
563
564 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
565 {
566 struct phy_device *phy_dev = pdata->phy_dev;
567 unsigned int temp;
568 unsigned int i = 100000;
569
570 BUG_ON(!phy_dev);
571 BUG_ON(!phy_dev->bus);
572
573 SMSC_TRACE(HW, "Performing PHY BCR Reset");
574 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
575 do {
576 msleep(1);
577 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
578 MII_BMCR);
579 } while ((i--) && (temp & BMCR_RESET));
580
581 if (temp & BMCR_RESET) {
582 SMSC_WARNING(HW, "PHY reset failed to complete.");
583 return -EIO;
584 }
585 /* Extra delay required because the phy may not be completed with
586 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
587 * enough delay but using 1ms here to be safe */
588 msleep(1);
589
590 return 0;
591 }
592
593 static int smsc911x_phy_loopbacktest(struct net_device *dev)
594 {
595 struct smsc911x_data *pdata = netdev_priv(dev);
596 struct phy_device *phy_dev = pdata->phy_dev;
597 int result = -EIO;
598 unsigned int i, val;
599 unsigned long flags;
600
601 /* Initialise tx packet using broadcast destination address */
602 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN);
603
604 /* Use incrementing source address */
605 for (i = 6; i < 12; i++)
606 pdata->loopback_tx_pkt[i] = (char)i;
607
608 /* Set length type field */
609 pdata->loopback_tx_pkt[12] = 0x00;
610 pdata->loopback_tx_pkt[13] = 0x00;
611
612 for (i = 14; i < MIN_PACKET_SIZE; i++)
613 pdata->loopback_tx_pkt[i] = (char)i;
614
615 val = smsc911x_reg_read(pdata, HW_CFG);
616 val &= HW_CFG_TX_FIF_SZ_;
617 val |= HW_CFG_SF_;
618 smsc911x_reg_write(pdata, HW_CFG, val);
619
620 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
621 smsc911x_reg_write(pdata, RX_CFG,
622 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
623
624 for (i = 0; i < 10; i++) {
625 /* Set PHY to 10/FD, no ANEG, and loopback mode */
626 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR,
627 BMCR_LOOPBACK | BMCR_FULLDPLX);
628
629 /* Enable MAC tx/rx, FD */
630 spin_lock_irqsave(&pdata->mac_lock, flags);
631 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
632 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
633 spin_unlock_irqrestore(&pdata->mac_lock, flags);
634
635 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
636 result = 0;
637 break;
638 }
639 pdata->resetcount++;
640
641 /* Disable MAC rx */
642 spin_lock_irqsave(&pdata->mac_lock, flags);
643 smsc911x_mac_write(pdata, MAC_CR, 0);
644 spin_unlock_irqrestore(&pdata->mac_lock, flags);
645
646 smsc911x_phy_reset(pdata);
647 }
648
649 /* Disable MAC */
650 spin_lock_irqsave(&pdata->mac_lock, flags);
651 smsc911x_mac_write(pdata, MAC_CR, 0);
652 spin_unlock_irqrestore(&pdata->mac_lock, flags);
653
654 /* Cancel PHY loopback mode */
655 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
656
657 smsc911x_reg_write(pdata, TX_CFG, 0);
658 smsc911x_reg_write(pdata, RX_CFG, 0);
659
660 return result;
661 }
662 #endif /* USE_PHY_WORK_AROUND */
663
664 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
665 {
666 struct phy_device *phy_dev = pdata->phy_dev;
667 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
668 u32 flow;
669 unsigned long flags;
670
671 if (phy_dev->duplex == DUPLEX_FULL) {
672 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
673 u16 rmtadv = phy_read(phy_dev, MII_LPA);
674 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
675
676 if (cap & FLOW_CTRL_RX)
677 flow = 0xFFFF0002;
678 else
679 flow = 0;
680
681 if (cap & FLOW_CTRL_TX)
682 afc |= 0xF;
683 else
684 afc &= ~0xF;
685
686 SMSC_TRACE(HW, "rx pause %s, tx pause %s",
687 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
688 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
689 } else {
690 SMSC_TRACE(HW, "half duplex");
691 flow = 0;
692 afc |= 0xF;
693 }
694
695 spin_lock_irqsave(&pdata->mac_lock, flags);
696 smsc911x_mac_write(pdata, FLOW, flow);
697 spin_unlock_irqrestore(&pdata->mac_lock, flags);
698
699 smsc911x_reg_write(pdata, AFC_CFG, afc);
700 }
701
702 /* Update link mode if anything has changed. Called periodically when the
703 * PHY is in polling mode, even if nothing has changed. */
704 static void smsc911x_phy_adjust_link(struct net_device *dev)
705 {
706 struct smsc911x_data *pdata = netdev_priv(dev);
707 struct phy_device *phy_dev = pdata->phy_dev;
708 unsigned long flags;
709 int carrier;
710
711 if (phy_dev->duplex != pdata->last_duplex) {
712 unsigned int mac_cr;
713 SMSC_TRACE(HW, "duplex state has changed");
714
715 spin_lock_irqsave(&pdata->mac_lock, flags);
716 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
717 if (phy_dev->duplex) {
718 SMSC_TRACE(HW,
719 "configuring for full duplex mode");
720 mac_cr |= MAC_CR_FDPX_;
721 } else {
722 SMSC_TRACE(HW,
723 "configuring for half duplex mode");
724 mac_cr &= ~MAC_CR_FDPX_;
725 }
726 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
727 spin_unlock_irqrestore(&pdata->mac_lock, flags);
728
729 smsc911x_phy_update_flowcontrol(pdata);
730 pdata->last_duplex = phy_dev->duplex;
731 }
732
733 carrier = netif_carrier_ok(dev);
734 if (carrier != pdata->last_carrier) {
735 SMSC_TRACE(HW, "carrier state has changed");
736 if (carrier) {
737 SMSC_TRACE(HW, "configuring for carrier OK");
738 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
739 (!pdata->using_extphy)) {
740 /* Restore orginal GPIO configuration */
741 pdata->gpio_setting = pdata->gpio_orig_setting;
742 smsc911x_reg_write(pdata, GPIO_CFG,
743 pdata->gpio_setting);
744 }
745 } else {
746 SMSC_TRACE(HW, "configuring for no carrier");
747 /* Check global setting that LED1
748 * usage is 10/100 indicator */
749 pdata->gpio_setting = smsc911x_reg_read(pdata,
750 GPIO_CFG);
751 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_)
752 && (!pdata->using_extphy)) {
753 /* Force 10/100 LED off, after saving
754 * orginal GPIO configuration */
755 pdata->gpio_orig_setting = pdata->gpio_setting;
756
757 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
758 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
759 | GPIO_CFG_GPIODIR0_
760 | GPIO_CFG_GPIOD0_);
761 smsc911x_reg_write(pdata, GPIO_CFG,
762 pdata->gpio_setting);
763 }
764 }
765 pdata->last_carrier = carrier;
766 }
767 }
768
769 static int smsc911x_mii_probe(struct net_device *dev)
770 {
771 struct smsc911x_data *pdata = netdev_priv(dev);
772 struct phy_device *phydev = NULL;
773 int phy_addr;
774
775 /* find the first phy */
776 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
777 if (pdata->mii_bus->phy_map[phy_addr]) {
778 phydev = pdata->mii_bus->phy_map[phy_addr];
779 SMSC_TRACE(PROBE, "PHY %d: addr %d, phy_id 0x%08X",
780 phy_addr, phydev->addr, phydev->phy_id);
781 break;
782 }
783 }
784
785 if (!phydev) {
786 pr_err("%s: no PHY found\n", dev->name);
787 return -ENODEV;
788 }
789
790 phydev = phy_connect(dev, dev_name(&phydev->dev),
791 &smsc911x_phy_adjust_link, 0, pdata->config.phy_interface);
792
793 if (IS_ERR(phydev)) {
794 pr_err("%s: Could not attach to PHY\n", dev->name);
795 return PTR_ERR(phydev);
796 }
797
798 pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
799 dev->name, phydev->drv->name,
800 dev_name(&phydev->dev), phydev->irq);
801
802 /* mask with MAC supported features */
803 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
804 SUPPORTED_Asym_Pause);
805 phydev->advertising = phydev->supported;
806
807 pdata->phy_dev = phydev;
808 pdata->last_duplex = -1;
809 pdata->last_carrier = -1;
810
811 #ifdef USE_PHY_WORK_AROUND
812 if (smsc911x_phy_loopbacktest(dev) < 0) {
813 SMSC_WARNING(HW, "Failed Loop Back Test");
814 return -ENODEV;
815 }
816 SMSC_TRACE(HW, "Passed Loop Back Test");
817 #endif /* USE_PHY_WORK_AROUND */
818
819 SMSC_TRACE(HW, "phy initialised succesfully");
820 return 0;
821 }
822
823 static int __devinit smsc911x_mii_init(struct platform_device *pdev,
824 struct net_device *dev)
825 {
826 struct smsc911x_data *pdata = netdev_priv(dev);
827 int err = -ENXIO, i;
828
829 pdata->mii_bus = mdiobus_alloc();
830 if (!pdata->mii_bus) {
831 err = -ENOMEM;
832 goto err_out_1;
833 }
834
835 pdata->mii_bus->name = SMSC_MDIONAME;
836 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id);
837 pdata->mii_bus->priv = pdata;
838 pdata->mii_bus->read = smsc911x_mii_read;
839 pdata->mii_bus->write = smsc911x_mii_write;
840 pdata->mii_bus->irq = pdata->phy_irq;
841 for (i = 0; i < PHY_MAX_ADDR; ++i)
842 pdata->mii_bus->irq[i] = PHY_POLL;
843
844 pdata->mii_bus->parent = &pdev->dev;
845
846 switch (pdata->idrev & 0xFFFF0000) {
847 case 0x01170000:
848 case 0x01150000:
849 case 0x117A0000:
850 case 0x115A0000:
851 /* External PHY supported, try to autodetect */
852 smsc911x_phy_initialise_external(pdata);
853 break;
854 default:
855 SMSC_TRACE(HW, "External PHY is not supported, "
856 "using internal PHY");
857 pdata->using_extphy = 0;
858 break;
859 }
860
861 if (!pdata->using_extphy) {
862 /* Mask all PHYs except ID 1 (internal) */
863 pdata->mii_bus->phy_mask = ~(1 << 1);
864 }
865
866 if (mdiobus_register(pdata->mii_bus)) {
867 SMSC_WARNING(PROBE, "Error registering mii bus");
868 goto err_out_free_bus_2;
869 }
870
871 if (smsc911x_mii_probe(dev) < 0) {
872 SMSC_WARNING(PROBE, "Error registering mii bus");
873 goto err_out_unregister_bus_3;
874 }
875
876 return 0;
877
878 err_out_unregister_bus_3:
879 mdiobus_unregister(pdata->mii_bus);
880 err_out_free_bus_2:
881 mdiobus_free(pdata->mii_bus);
882 err_out_1:
883 return err;
884 }
885
886 /* Gets the number of tx statuses in the fifo */
887 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
888 {
889 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
890 & TX_FIFO_INF_TSUSED_) >> 16;
891 }
892
893 /* Reads tx statuses and increments counters where necessary */
894 static void smsc911x_tx_update_txcounters(struct net_device *dev)
895 {
896 struct smsc911x_data *pdata = netdev_priv(dev);
897 unsigned int tx_stat;
898
899 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
900 if (unlikely(tx_stat & 0x80000000)) {
901 /* In this driver the packet tag is used as the packet
902 * length. Since a packet length can never reach the
903 * size of 0x8000, this bit is reserved. It is worth
904 * noting that the "reserved bit" in the warning above
905 * does not reference a hardware defined reserved bit
906 * but rather a driver defined one.
907 */
908 SMSC_WARNING(HW,
909 "Packet tag reserved bit is high");
910 } else {
911 if (unlikely(tx_stat & TX_STS_ES_)) {
912 dev->stats.tx_errors++;
913 } else {
914 dev->stats.tx_packets++;
915 dev->stats.tx_bytes += (tx_stat >> 16);
916 }
917 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
918 dev->stats.collisions += 16;
919 dev->stats.tx_aborted_errors += 1;
920 } else {
921 dev->stats.collisions +=
922 ((tx_stat >> 3) & 0xF);
923 }
924 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
925 dev->stats.tx_carrier_errors += 1;
926 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
927 dev->stats.collisions++;
928 dev->stats.tx_aborted_errors++;
929 }
930 }
931 }
932 }
933
934 /* Increments the Rx error counters */
935 static void
936 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
937 {
938 int crc_err = 0;
939
940 if (unlikely(rxstat & RX_STS_ES_)) {
941 dev->stats.rx_errors++;
942 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
943 dev->stats.rx_crc_errors++;
944 crc_err = 1;
945 }
946 }
947 if (likely(!crc_err)) {
948 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
949 (rxstat & RX_STS_LENGTH_ERR_)))
950 dev->stats.rx_length_errors++;
951 if (rxstat & RX_STS_MCAST_)
952 dev->stats.multicast++;
953 }
954 }
955
956 /* Quickly dumps bad packets */
957 static void
958 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes)
959 {
960 unsigned int pktwords = (pktbytes + NET_IP_ALIGN + 3) >> 2;
961
962 if (likely(pktwords >= 4)) {
963 unsigned int timeout = 500;
964 unsigned int val;
965 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
966 do {
967 udelay(1);
968 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
969 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
970
971 if (unlikely(timeout == 0))
972 SMSC_WARNING(HW, "Timed out waiting for "
973 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
974 } else {
975 unsigned int temp;
976 while (pktwords--)
977 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
978 }
979 }
980
981 /* NAPI poll function */
982 static int smsc911x_poll(struct napi_struct *napi, int budget)
983 {
984 struct smsc911x_data *pdata =
985 container_of(napi, struct smsc911x_data, napi);
986 struct net_device *dev = pdata->dev;
987 int npackets = 0;
988
989 while (likely(netif_running(dev)) && (npackets < budget)) {
990 unsigned int pktlength;
991 unsigned int pktwords;
992 struct sk_buff *skb;
993 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
994
995 if (!rxstat) {
996 unsigned int temp;
997 /* We processed all packets available. Tell NAPI it can
998 * stop polling then re-enable rx interrupts */
999 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1000 napi_complete(napi);
1001 temp = smsc911x_reg_read(pdata, INT_EN);
1002 temp |= INT_EN_RSFL_EN_;
1003 smsc911x_reg_write(pdata, INT_EN, temp);
1004 break;
1005 }
1006
1007 /* Count packet for NAPI scheduling, even if it has an error.
1008 * Error packets still require cycles to discard */
1009 npackets++;
1010
1011 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1012 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1013 smsc911x_rx_counterrors(dev, rxstat);
1014
1015 if (unlikely(rxstat & RX_STS_ES_)) {
1016 SMSC_WARNING(RX_ERR,
1017 "Discarding packet with error bit set");
1018 /* Packet has an error, discard it and continue with
1019 * the next */
1020 smsc911x_rx_fastforward(pdata, pktwords);
1021 dev->stats.rx_dropped++;
1022 continue;
1023 }
1024
1025 skb = netdev_alloc_skb(dev, pktlength + NET_IP_ALIGN);
1026 if (unlikely(!skb)) {
1027 SMSC_WARNING(RX_ERR,
1028 "Unable to allocate skb for rx packet");
1029 /* Drop the packet and stop this polling iteration */
1030 smsc911x_rx_fastforward(pdata, pktwords);
1031 dev->stats.rx_dropped++;
1032 break;
1033 }
1034
1035 skb->data = skb->head;
1036 skb_reset_tail_pointer(skb);
1037
1038 /* Align IP on 16B boundary */
1039 skb_reserve(skb, NET_IP_ALIGN);
1040 skb_put(skb, pktlength - 4);
1041 smsc911x_rx_readfifo(pdata, (unsigned int *)skb->head,
1042 pktwords);
1043 skb->protocol = eth_type_trans(skb, dev);
1044 skb->ip_summed = CHECKSUM_NONE;
1045 netif_receive_skb(skb);
1046
1047 /* Update counters */
1048 dev->stats.rx_packets++;
1049 dev->stats.rx_bytes += (pktlength - 4);
1050 dev->last_rx = jiffies;
1051 }
1052
1053 /* Return total received packets */
1054 return npackets;
1055 }
1056
1057 /* Returns hash bit number for given MAC address
1058 * Example:
1059 * 01 00 5E 00 00 01 -> returns bit number 31 */
1060 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1061 {
1062 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1063 }
1064
1065 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1066 {
1067 /* Performs the multicast & mac_cr update. This is called when
1068 * safe on the current hardware, and with the mac_lock held */
1069 unsigned int mac_cr;
1070
1071 SMSC_ASSERT_MAC_LOCK(pdata);
1072
1073 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1074 mac_cr |= pdata->set_bits_mask;
1075 mac_cr &= ~(pdata->clear_bits_mask);
1076 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1077 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1078 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1079 SMSC_TRACE(HW, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1080 mac_cr, pdata->hashhi, pdata->hashlo);
1081 }
1082
1083 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1084 {
1085 unsigned int mac_cr;
1086
1087 /* This function is only called for older LAN911x devices
1088 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1089 * be modified during Rx - newer devices immediately update the
1090 * registers.
1091 *
1092 * This is called from interrupt context */
1093
1094 spin_lock(&pdata->mac_lock);
1095
1096 /* Check Rx has stopped */
1097 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1098 SMSC_WARNING(DRV, "Rx not stopped");
1099
1100 /* Perform the update - safe to do now Rx has stopped */
1101 smsc911x_rx_multicast_update(pdata);
1102
1103 /* Re-enable Rx */
1104 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1105 mac_cr |= MAC_CR_RXEN_;
1106 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1107
1108 pdata->multicast_update_pending = 0;
1109
1110 spin_unlock(&pdata->mac_lock);
1111 }
1112
1113 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1114 {
1115 unsigned int timeout;
1116 unsigned int temp;
1117
1118 /* Reset the LAN911x */
1119 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1120 timeout = 10;
1121 do {
1122 udelay(10);
1123 temp = smsc911x_reg_read(pdata, HW_CFG);
1124 } while ((--timeout) && (temp & HW_CFG_SRST_));
1125
1126 if (unlikely(temp & HW_CFG_SRST_)) {
1127 SMSC_WARNING(DRV, "Failed to complete reset");
1128 return -EIO;
1129 }
1130 return 0;
1131 }
1132
1133 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1134 static void
1135 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1136 {
1137 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1138 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1139 (dev_addr[1] << 8) | dev_addr[0];
1140
1141 SMSC_ASSERT_MAC_LOCK(pdata);
1142
1143 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1144 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1145 }
1146
1147 static int smsc911x_open(struct net_device *dev)
1148 {
1149 struct smsc911x_data *pdata = netdev_priv(dev);
1150 unsigned int timeout;
1151 unsigned int temp;
1152 unsigned int intcfg;
1153
1154 /* if the phy is not yet registered, retry later*/
1155 if (!pdata->phy_dev) {
1156 SMSC_WARNING(HW, "phy_dev is NULL");
1157 return -EAGAIN;
1158 }
1159
1160 if (!is_valid_ether_addr(dev->dev_addr)) {
1161 SMSC_WARNING(HW, "dev_addr is not a valid MAC address");
1162 return -EADDRNOTAVAIL;
1163 }
1164
1165 /* Reset the LAN911x */
1166 if (smsc911x_soft_reset(pdata)) {
1167 SMSC_WARNING(HW, "soft reset failed");
1168 return -EIO;
1169 }
1170
1171 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1172 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1173
1174 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1175 timeout = 50;
1176 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1177 --timeout) {
1178 udelay(10);
1179 }
1180
1181 if (unlikely(timeout == 0))
1182 SMSC_WARNING(IFUP,
1183 "Timed out waiting for EEPROM busy bit to clear");
1184
1185 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1186
1187 /* The soft reset above cleared the device's MAC address,
1188 * restore it from local copy (set in probe) */
1189 spin_lock_irq(&pdata->mac_lock);
1190 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1191 spin_unlock_irq(&pdata->mac_lock);
1192
1193 /* Initialise irqs, but leave all sources disabled */
1194 smsc911x_reg_write(pdata, INT_EN, 0);
1195 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1196
1197 /* Set interrupt deassertion to 100uS */
1198 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1199
1200 if (pdata->config.irq_polarity) {
1201 SMSC_TRACE(IFUP, "irq polarity: active high");
1202 intcfg |= INT_CFG_IRQ_POL_;
1203 } else {
1204 SMSC_TRACE(IFUP, "irq polarity: active low");
1205 }
1206
1207 if (pdata->config.irq_type) {
1208 SMSC_TRACE(IFUP, "irq type: push-pull");
1209 intcfg |= INT_CFG_IRQ_TYPE_;
1210 } else {
1211 SMSC_TRACE(IFUP, "irq type: open drain");
1212 }
1213
1214 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1215
1216 SMSC_TRACE(IFUP, "Testing irq handler using IRQ %d", dev->irq);
1217 pdata->software_irq_signal = 0;
1218 smp_wmb();
1219
1220 temp = smsc911x_reg_read(pdata, INT_EN);
1221 temp |= INT_EN_SW_INT_EN_;
1222 smsc911x_reg_write(pdata, INT_EN, temp);
1223
1224 timeout = 1000;
1225 while (timeout--) {
1226 if (pdata->software_irq_signal)
1227 break;
1228 msleep(1);
1229 }
1230
1231 if (!pdata->software_irq_signal) {
1232 dev_warn(&dev->dev, "ISR failed signaling test (IRQ %d)\n",
1233 dev->irq);
1234 return -ENODEV;
1235 }
1236 SMSC_TRACE(IFUP, "IRQ handler passed test using IRQ %d", dev->irq);
1237
1238 dev_info(&dev->dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1239 (unsigned long)pdata->ioaddr, dev->irq);
1240
1241 /* Reset the last known duplex and carrier */
1242 pdata->last_duplex = -1;
1243 pdata->last_carrier = -1;
1244
1245 /* Bring the PHY up */
1246 phy_start(pdata->phy_dev);
1247
1248 temp = smsc911x_reg_read(pdata, HW_CFG);
1249 /* Preserve TX FIFO size and external PHY configuration */
1250 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1251 temp |= HW_CFG_SF_;
1252 smsc911x_reg_write(pdata, HW_CFG, temp);
1253
1254 temp = smsc911x_reg_read(pdata, FIFO_INT);
1255 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1256 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1257 smsc911x_reg_write(pdata, FIFO_INT, temp);
1258
1259 /* set RX Data offset to 2 bytes for alignment */
1260 smsc911x_reg_write(pdata, RX_CFG, (2 << 8));
1261
1262 /* enable NAPI polling before enabling RX interrupts */
1263 napi_enable(&pdata->napi);
1264
1265 temp = smsc911x_reg_read(pdata, INT_EN);
1266 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1267 smsc911x_reg_write(pdata, INT_EN, temp);
1268
1269 spin_lock_irq(&pdata->mac_lock);
1270 temp = smsc911x_mac_read(pdata, MAC_CR);
1271 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1272 smsc911x_mac_write(pdata, MAC_CR, temp);
1273 spin_unlock_irq(&pdata->mac_lock);
1274
1275 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1276
1277 netif_start_queue(dev);
1278 return 0;
1279 }
1280
1281 /* Entry point for stopping the interface */
1282 static int smsc911x_stop(struct net_device *dev)
1283 {
1284 struct smsc911x_data *pdata = netdev_priv(dev);
1285 unsigned int temp;
1286
1287 /* Disable all device interrupts */
1288 temp = smsc911x_reg_read(pdata, INT_CFG);
1289 temp &= ~INT_CFG_IRQ_EN_;
1290 smsc911x_reg_write(pdata, INT_CFG, temp);
1291
1292 /* Stop Tx and Rx polling */
1293 netif_stop_queue(dev);
1294 napi_disable(&pdata->napi);
1295
1296 /* At this point all Rx and Tx activity is stopped */
1297 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1298 smsc911x_tx_update_txcounters(dev);
1299
1300 /* Bring the PHY down */
1301 if (pdata->phy_dev)
1302 phy_stop(pdata->phy_dev);
1303
1304 SMSC_TRACE(IFDOWN, "Interface stopped");
1305 return 0;
1306 }
1307
1308 /* Entry point for transmitting a packet */
1309 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1310 {
1311 struct smsc911x_data *pdata = netdev_priv(dev);
1312 unsigned int freespace;
1313 unsigned int tx_cmd_a;
1314 unsigned int tx_cmd_b;
1315 unsigned int temp;
1316 u32 wrsz;
1317 ulong bufp;
1318
1319 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1320
1321 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1322 SMSC_WARNING(TX_ERR,
1323 "Tx data fifo low, space available: %d", freespace);
1324
1325 /* Word alignment adjustment */
1326 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1327 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1328 tx_cmd_a |= (unsigned int)skb->len;
1329
1330 tx_cmd_b = ((unsigned int)skb->len) << 16;
1331 tx_cmd_b |= (unsigned int)skb->len;
1332
1333 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1334 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1335
1336 bufp = (ulong)skb->data & (~0x3);
1337 wrsz = (u32)skb->len + 3;
1338 wrsz += (u32)((ulong)skb->data & 0x3);
1339 wrsz >>= 2;
1340
1341 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1342 freespace -= (skb->len + 32);
1343 dev_kfree_skb(skb);
1344 dev->trans_start = jiffies;
1345
1346 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1347 smsc911x_tx_update_txcounters(dev);
1348
1349 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1350 netif_stop_queue(dev);
1351 temp = smsc911x_reg_read(pdata, FIFO_INT);
1352 temp &= 0x00FFFFFF;
1353 temp |= 0x32000000;
1354 smsc911x_reg_write(pdata, FIFO_INT, temp);
1355 }
1356
1357 return NETDEV_TX_OK;
1358 }
1359
1360 /* Entry point for getting status counters */
1361 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1362 {
1363 struct smsc911x_data *pdata = netdev_priv(dev);
1364 smsc911x_tx_update_txcounters(dev);
1365 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1366 return &dev->stats;
1367 }
1368
1369 /* Entry point for setting addressing modes */
1370 static void smsc911x_set_multicast_list(struct net_device *dev)
1371 {
1372 struct smsc911x_data *pdata = netdev_priv(dev);
1373 unsigned long flags;
1374
1375 if (dev->flags & IFF_PROMISC) {
1376 /* Enabling promiscuous mode */
1377 pdata->set_bits_mask = MAC_CR_PRMS_;
1378 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1379 pdata->hashhi = 0;
1380 pdata->hashlo = 0;
1381 } else if (dev->flags & IFF_ALLMULTI) {
1382 /* Enabling all multicast mode */
1383 pdata->set_bits_mask = MAC_CR_MCPAS_;
1384 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1385 pdata->hashhi = 0;
1386 pdata->hashlo = 0;
1387 } else if (dev->mc_count > 0) {
1388 /* Enabling specific multicast addresses */
1389 unsigned int hash_high = 0;
1390 unsigned int hash_low = 0;
1391 unsigned int count = 0;
1392 struct dev_mc_list *mc_list = dev->mc_list;
1393
1394 pdata->set_bits_mask = MAC_CR_HPFILT_;
1395 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1396
1397 while (mc_list) {
1398 count++;
1399 if ((mc_list->dmi_addrlen) == ETH_ALEN) {
1400 unsigned int bitnum =
1401 smsc911x_hash(mc_list->dmi_addr);
1402 unsigned int mask = 0x01 << (bitnum & 0x1F);
1403 if (bitnum & 0x20)
1404 hash_high |= mask;
1405 else
1406 hash_low |= mask;
1407 } else {
1408 SMSC_WARNING(DRV, "dmi_addrlen != 6");
1409 }
1410 mc_list = mc_list->next;
1411 }
1412 if (count != (unsigned int)dev->mc_count)
1413 SMSC_WARNING(DRV, "mc_count != dev->mc_count");
1414
1415 pdata->hashhi = hash_high;
1416 pdata->hashlo = hash_low;
1417 } else {
1418 /* Enabling local MAC address only */
1419 pdata->set_bits_mask = 0;
1420 pdata->clear_bits_mask =
1421 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1422 pdata->hashhi = 0;
1423 pdata->hashlo = 0;
1424 }
1425
1426 spin_lock_irqsave(&pdata->mac_lock, flags);
1427
1428 if (pdata->generation <= 1) {
1429 /* Older hardware revision - cannot change these flags while
1430 * receiving data */
1431 if (!pdata->multicast_update_pending) {
1432 unsigned int temp;
1433 SMSC_TRACE(HW, "scheduling mcast update");
1434 pdata->multicast_update_pending = 1;
1435
1436 /* Request the hardware to stop, then perform the
1437 * update when we get an RX_STOP interrupt */
1438 temp = smsc911x_mac_read(pdata, MAC_CR);
1439 temp &= ~(MAC_CR_RXEN_);
1440 smsc911x_mac_write(pdata, MAC_CR, temp);
1441 } else {
1442 /* There is another update pending, this should now
1443 * use the newer values */
1444 }
1445 } else {
1446 /* Newer hardware revision - can write immediately */
1447 smsc911x_rx_multicast_update(pdata);
1448 }
1449
1450 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1451 }
1452
1453 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1454 {
1455 struct net_device *dev = dev_id;
1456 struct smsc911x_data *pdata = netdev_priv(dev);
1457 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1458 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1459 int serviced = IRQ_NONE;
1460 u32 temp;
1461
1462 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1463 temp = smsc911x_reg_read(pdata, INT_EN);
1464 temp &= (~INT_EN_SW_INT_EN_);
1465 smsc911x_reg_write(pdata, INT_EN, temp);
1466 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1467 pdata->software_irq_signal = 1;
1468 smp_wmb();
1469 serviced = IRQ_HANDLED;
1470 }
1471
1472 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1473 /* Called when there is a multicast update scheduled and
1474 * it is now safe to complete the update */
1475 SMSC_TRACE(INTR, "RX Stop interrupt");
1476 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1477 if (pdata->multicast_update_pending)
1478 smsc911x_rx_multicast_update_workaround(pdata);
1479 serviced = IRQ_HANDLED;
1480 }
1481
1482 if (intsts & inten & INT_STS_TDFA_) {
1483 temp = smsc911x_reg_read(pdata, FIFO_INT);
1484 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1485 smsc911x_reg_write(pdata, FIFO_INT, temp);
1486 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1487 netif_wake_queue(dev);
1488 serviced = IRQ_HANDLED;
1489 }
1490
1491 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1492 SMSC_TRACE(INTR, "RX Error interrupt");
1493 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1494 serviced = IRQ_HANDLED;
1495 }
1496
1497 if (likely(intsts & inten & INT_STS_RSFL_)) {
1498 if (likely(napi_schedule_prep(&pdata->napi))) {
1499 /* Disable Rx interrupts */
1500 temp = smsc911x_reg_read(pdata, INT_EN);
1501 temp &= (~INT_EN_RSFL_EN_);
1502 smsc911x_reg_write(pdata, INT_EN, temp);
1503 /* Schedule a NAPI poll */
1504 __napi_schedule(&pdata->napi);
1505 } else {
1506 SMSC_WARNING(RX_ERR,
1507 "napi_schedule_prep failed");
1508 }
1509 serviced = IRQ_HANDLED;
1510 }
1511
1512 return serviced;
1513 }
1514
1515 #ifdef CONFIG_NET_POLL_CONTROLLER
1516 static void smsc911x_poll_controller(struct net_device *dev)
1517 {
1518 disable_irq(dev->irq);
1519 smsc911x_irqhandler(0, dev);
1520 enable_irq(dev->irq);
1521 }
1522 #endif /* CONFIG_NET_POLL_CONTROLLER */
1523
1524 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1525 {
1526 struct smsc911x_data *pdata = netdev_priv(dev);
1527 struct sockaddr *addr = p;
1528
1529 /* On older hardware revisions we cannot change the mac address
1530 * registers while receiving data. Newer devices can safely change
1531 * this at any time. */
1532 if (pdata->generation <= 1 && netif_running(dev))
1533 return -EBUSY;
1534
1535 if (!is_valid_ether_addr(addr->sa_data))
1536 return -EADDRNOTAVAIL;
1537
1538 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1539
1540 spin_lock_irq(&pdata->mac_lock);
1541 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1542 spin_unlock_irq(&pdata->mac_lock);
1543
1544 dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr);
1545
1546 return 0;
1547 }
1548
1549 /* Standard ioctls for mii-tool */
1550 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1551 {
1552 struct smsc911x_data *pdata = netdev_priv(dev);
1553
1554 if (!netif_running(dev) || !pdata->phy_dev)
1555 return -EINVAL;
1556
1557 return phy_mii_ioctl(pdata->phy_dev, if_mii(ifr), cmd);
1558 }
1559
1560 static int
1561 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1562 {
1563 struct smsc911x_data *pdata = netdev_priv(dev);
1564
1565 cmd->maxtxpkt = 1;
1566 cmd->maxrxpkt = 1;
1567 return phy_ethtool_gset(pdata->phy_dev, cmd);
1568 }
1569
1570 static int
1571 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1572 {
1573 struct smsc911x_data *pdata = netdev_priv(dev);
1574
1575 return phy_ethtool_sset(pdata->phy_dev, cmd);
1576 }
1577
1578 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1579 struct ethtool_drvinfo *info)
1580 {
1581 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1582 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1583 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1584 sizeof(info->bus_info));
1585 }
1586
1587 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1588 {
1589 struct smsc911x_data *pdata = netdev_priv(dev);
1590
1591 return phy_start_aneg(pdata->phy_dev);
1592 }
1593
1594 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1595 {
1596 struct smsc911x_data *pdata = netdev_priv(dev);
1597 return pdata->msg_enable;
1598 }
1599
1600 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1601 {
1602 struct smsc911x_data *pdata = netdev_priv(dev);
1603 pdata->msg_enable = level;
1604 }
1605
1606 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1607 {
1608 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1609 sizeof(u32);
1610 }
1611
1612 static void
1613 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1614 void *buf)
1615 {
1616 struct smsc911x_data *pdata = netdev_priv(dev);
1617 struct phy_device *phy_dev = pdata->phy_dev;
1618 unsigned long flags;
1619 unsigned int i;
1620 unsigned int j = 0;
1621 u32 *data = buf;
1622
1623 regs->version = pdata->idrev;
1624 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1625 data[j++] = smsc911x_reg_read(pdata, i);
1626
1627 for (i = MAC_CR; i <= WUCSR; i++) {
1628 spin_lock_irqsave(&pdata->mac_lock, flags);
1629 data[j++] = smsc911x_mac_read(pdata, i);
1630 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1631 }
1632
1633 for (i = 0; i <= 31; i++)
1634 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
1635 }
1636
1637 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
1638 {
1639 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
1640 temp &= ~GPIO_CFG_EEPR_EN_;
1641 smsc911x_reg_write(pdata, GPIO_CFG, temp);
1642 msleep(1);
1643 }
1644
1645 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
1646 {
1647 int timeout = 100;
1648 u32 e2cmd;
1649
1650 SMSC_TRACE(DRV, "op 0x%08x", op);
1651 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
1652 SMSC_WARNING(DRV, "Busy at start");
1653 return -EBUSY;
1654 }
1655
1656 e2cmd = op | E2P_CMD_EPC_BUSY_;
1657 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
1658
1659 do {
1660 msleep(1);
1661 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
1662 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
1663
1664 if (!timeout) {
1665 SMSC_TRACE(DRV, "TIMED OUT");
1666 return -EAGAIN;
1667 }
1668
1669 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
1670 SMSC_TRACE(DRV, "Error occured during eeprom operation");
1671 return -EINVAL;
1672 }
1673
1674 return 0;
1675 }
1676
1677 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
1678 u8 address, u8 *data)
1679 {
1680 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
1681 int ret;
1682
1683 SMSC_TRACE(DRV, "address 0x%x", address);
1684 ret = smsc911x_eeprom_send_cmd(pdata, op);
1685
1686 if (!ret)
1687 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
1688
1689 return ret;
1690 }
1691
1692 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
1693 u8 address, u8 data)
1694 {
1695 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
1696 u32 temp;
1697 int ret;
1698
1699 SMSC_TRACE(DRV, "address 0x%x, data 0x%x", address, data);
1700 ret = smsc911x_eeprom_send_cmd(pdata, op);
1701
1702 if (!ret) {
1703 op = E2P_CMD_EPC_CMD_WRITE_ | address;
1704 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
1705
1706 /* Workaround for hardware read-after-write restriction */
1707 temp = smsc911x_reg_read(pdata, BYTE_TEST);
1708
1709 ret = smsc911x_eeprom_send_cmd(pdata, op);
1710 }
1711
1712 return ret;
1713 }
1714
1715 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
1716 {
1717 return SMSC911X_EEPROM_SIZE;
1718 }
1719
1720 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
1721 struct ethtool_eeprom *eeprom, u8 *data)
1722 {
1723 struct smsc911x_data *pdata = netdev_priv(dev);
1724 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
1725 int len;
1726 int i;
1727
1728 smsc911x_eeprom_enable_access(pdata);
1729
1730 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
1731 for (i = 0; i < len; i++) {
1732 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
1733 if (ret < 0) {
1734 eeprom->len = 0;
1735 return ret;
1736 }
1737 }
1738
1739 memcpy(data, &eeprom_data[eeprom->offset], len);
1740 eeprom->len = len;
1741 return 0;
1742 }
1743
1744 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
1745 struct ethtool_eeprom *eeprom, u8 *data)
1746 {
1747 int ret;
1748 struct smsc911x_data *pdata = netdev_priv(dev);
1749
1750 smsc911x_eeprom_enable_access(pdata);
1751 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
1752 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
1753 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
1754
1755 /* Single byte write, according to man page */
1756 eeprom->len = 1;
1757
1758 return ret;
1759 }
1760
1761 static const struct ethtool_ops smsc911x_ethtool_ops = {
1762 .get_settings = smsc911x_ethtool_getsettings,
1763 .set_settings = smsc911x_ethtool_setsettings,
1764 .get_link = ethtool_op_get_link,
1765 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
1766 .nway_reset = smsc911x_ethtool_nwayreset,
1767 .get_msglevel = smsc911x_ethtool_getmsglevel,
1768 .set_msglevel = smsc911x_ethtool_setmsglevel,
1769 .get_regs_len = smsc911x_ethtool_getregslen,
1770 .get_regs = smsc911x_ethtool_getregs,
1771 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
1772 .get_eeprom = smsc911x_ethtool_get_eeprom,
1773 .set_eeprom = smsc911x_ethtool_set_eeprom,
1774 };
1775
1776 static const struct net_device_ops smsc911x_netdev_ops = {
1777 .ndo_open = smsc911x_open,
1778 .ndo_stop = smsc911x_stop,
1779 .ndo_start_xmit = smsc911x_hard_start_xmit,
1780 .ndo_get_stats = smsc911x_get_stats,
1781 .ndo_set_multicast_list = smsc911x_set_multicast_list,
1782 .ndo_do_ioctl = smsc911x_do_ioctl,
1783 .ndo_change_mtu = eth_change_mtu,
1784 .ndo_validate_addr = eth_validate_addr,
1785 .ndo_set_mac_address = smsc911x_set_mac_address,
1786 #ifdef CONFIG_NET_POLL_CONTROLLER
1787 .ndo_poll_controller = smsc911x_poll_controller,
1788 #endif
1789 };
1790
1791 /* copies the current mac address from hardware to dev->dev_addr */
1792 static void __devinit smsc911x_read_mac_address(struct net_device *dev)
1793 {
1794 struct smsc911x_data *pdata = netdev_priv(dev);
1795 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
1796 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
1797
1798 dev->dev_addr[0] = (u8)(mac_low32);
1799 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
1800 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
1801 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
1802 dev->dev_addr[4] = (u8)(mac_high16);
1803 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
1804 }
1805
1806 /* Initializing private device structures, only called from probe */
1807 static int __devinit smsc911x_init(struct net_device *dev)
1808 {
1809 struct smsc911x_data *pdata = netdev_priv(dev);
1810 unsigned int byte_test;
1811
1812 SMSC_TRACE(PROBE, "Driver Parameters:");
1813 SMSC_TRACE(PROBE, "LAN base: 0x%08lX",
1814 (unsigned long)pdata->ioaddr);
1815 SMSC_TRACE(PROBE, "IRQ: %d", dev->irq);
1816 SMSC_TRACE(PROBE, "PHY will be autodetected.");
1817
1818 spin_lock_init(&pdata->dev_lock);
1819
1820 if (pdata->ioaddr == 0) {
1821 SMSC_WARNING(PROBE, "pdata->ioaddr: 0x00000000");
1822 return -ENODEV;
1823 }
1824
1825 /* Check byte ordering */
1826 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1827 SMSC_TRACE(PROBE, "BYTE_TEST: 0x%08X", byte_test);
1828 if (byte_test == 0x43218765) {
1829 SMSC_TRACE(PROBE, "BYTE_TEST looks swapped, "
1830 "applying WORD_SWAP");
1831 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
1832
1833 /* 1 dummy read of BYTE_TEST is needed after a write to
1834 * WORD_SWAP before its contents are valid */
1835 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1836
1837 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1838 }
1839
1840 if (byte_test != 0x87654321) {
1841 SMSC_WARNING(DRV, "BYTE_TEST: 0x%08X", byte_test);
1842 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
1843 SMSC_WARNING(PROBE,
1844 "top 16 bits equal to bottom 16 bits");
1845 SMSC_TRACE(PROBE, "This may mean the chip is set "
1846 "for 32 bit while the bus is reading 16 bit");
1847 }
1848 return -ENODEV;
1849 }
1850
1851 /* Default generation to zero (all workarounds apply) */
1852 pdata->generation = 0;
1853
1854 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
1855 switch (pdata->idrev & 0xFFFF0000) {
1856 case 0x01180000:
1857 case 0x01170000:
1858 case 0x01160000:
1859 case 0x01150000:
1860 /* LAN911[5678] family */
1861 pdata->generation = pdata->idrev & 0x0000FFFF;
1862 break;
1863
1864 case 0x118A0000:
1865 case 0x117A0000:
1866 case 0x116A0000:
1867 case 0x115A0000:
1868 /* LAN921[5678] family */
1869 pdata->generation = 3;
1870 break;
1871
1872 case 0x92100000:
1873 case 0x92110000:
1874 case 0x92200000:
1875 case 0x92210000:
1876 /* LAN9210/LAN9211/LAN9220/LAN9221 */
1877 pdata->generation = 4;
1878 break;
1879
1880 default:
1881 SMSC_WARNING(PROBE, "LAN911x not identified, idrev: 0x%08X",
1882 pdata->idrev);
1883 return -ENODEV;
1884 }
1885
1886 SMSC_TRACE(PROBE, "LAN911x identified, idrev: 0x%08X, generation: %d",
1887 pdata->idrev, pdata->generation);
1888
1889 if (pdata->generation == 0)
1890 SMSC_WARNING(PROBE,
1891 "This driver is not intended for this chip revision");
1892
1893 /* workaround for platforms without an eeprom, where the mac address
1894 * is stored elsewhere and set by the bootloader. This saves the
1895 * mac address before resetting the device */
1896 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS)
1897 smsc911x_read_mac_address(dev);
1898
1899 /* Reset the LAN911x */
1900 if (smsc911x_soft_reset(pdata))
1901 return -ENODEV;
1902
1903 /* Disable all interrupt sources until we bring the device up */
1904 smsc911x_reg_write(pdata, INT_EN, 0);
1905
1906 ether_setup(dev);
1907 dev->flags |= IFF_MULTICAST;
1908 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
1909 dev->netdev_ops = &smsc911x_netdev_ops;
1910 dev->ethtool_ops = &smsc911x_ethtool_ops;
1911
1912 return 0;
1913 }
1914
1915 static int __devexit smsc911x_drv_remove(struct platform_device *pdev)
1916 {
1917 struct net_device *dev;
1918 struct smsc911x_data *pdata;
1919 struct resource *res;
1920
1921 dev = platform_get_drvdata(pdev);
1922 BUG_ON(!dev);
1923 pdata = netdev_priv(dev);
1924 BUG_ON(!pdata);
1925 BUG_ON(!pdata->ioaddr);
1926 BUG_ON(!pdata->phy_dev);
1927
1928 SMSC_TRACE(IFDOWN, "Stopping driver.");
1929
1930 phy_disconnect(pdata->phy_dev);
1931 pdata->phy_dev = NULL;
1932 mdiobus_unregister(pdata->mii_bus);
1933 mdiobus_free(pdata->mii_bus);
1934
1935 platform_set_drvdata(pdev, NULL);
1936 unregister_netdev(dev);
1937 free_irq(dev->irq, dev);
1938 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1939 "smsc911x-memory");
1940 if (!res)
1941 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1942
1943 release_mem_region(res->start, resource_size(res));
1944
1945 iounmap(pdata->ioaddr);
1946
1947 free_netdev(dev);
1948
1949 return 0;
1950 }
1951
1952 static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
1953 {
1954 struct net_device *dev;
1955 struct smsc911x_data *pdata;
1956 struct smsc911x_platform_config *config = pdev->dev.platform_data;
1957 struct resource *res, *irq_res;
1958 unsigned int intcfg = 0;
1959 int res_size, irq_flags;
1960 int retval;
1961
1962 pr_info("%s: Driver version %s.\n", SMSC_CHIPNAME, SMSC_DRV_VERSION);
1963
1964 /* platform data specifies irq & dynamic bus configuration */
1965 if (!pdev->dev.platform_data) {
1966 pr_warning("%s: platform_data not provided\n", SMSC_CHIPNAME);
1967 retval = -ENODEV;
1968 goto out_0;
1969 }
1970
1971 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1972 "smsc911x-memory");
1973 if (!res)
1974 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1975 if (!res) {
1976 pr_warning("%s: Could not allocate resource.\n",
1977 SMSC_CHIPNAME);
1978 retval = -ENODEV;
1979 goto out_0;
1980 }
1981 res_size = resource_size(res);
1982
1983 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1984 if (!irq_res) {
1985 pr_warning("%s: Could not allocate irq resource.\n",
1986 SMSC_CHIPNAME);
1987 retval = -ENODEV;
1988 goto out_0;
1989 }
1990
1991 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
1992 retval = -EBUSY;
1993 goto out_0;
1994 }
1995
1996 dev = alloc_etherdev(sizeof(struct smsc911x_data));
1997 if (!dev) {
1998 pr_warning("%s: Could not allocate device.\n", SMSC_CHIPNAME);
1999 retval = -ENOMEM;
2000 goto out_release_io_1;
2001 }
2002
2003 SET_NETDEV_DEV(dev, &pdev->dev);
2004
2005 pdata = netdev_priv(dev);
2006
2007 dev->irq = irq_res->start;
2008 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
2009 pdata->ioaddr = ioremap_nocache(res->start, res_size);
2010
2011 /* copy config parameters across to pdata */
2012 memcpy(&pdata->config, config, sizeof(pdata->config));
2013
2014 pdata->dev = dev;
2015 pdata->msg_enable = ((1 << debug) - 1);
2016
2017 if (pdata->ioaddr == NULL) {
2018 SMSC_WARNING(PROBE,
2019 "Error smsc911x base address invalid");
2020 retval = -ENOMEM;
2021 goto out_free_netdev_2;
2022 }
2023
2024 retval = smsc911x_init(dev);
2025 if (retval < 0)
2026 goto out_unmap_io_3;
2027
2028 /* configure irq polarity and type before connecting isr */
2029 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
2030 intcfg |= INT_CFG_IRQ_POL_;
2031
2032 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
2033 intcfg |= INT_CFG_IRQ_TYPE_;
2034
2035 smsc911x_reg_write(pdata, INT_CFG, intcfg);
2036
2037 /* Ensure interrupts are globally disabled before connecting ISR */
2038 smsc911x_reg_write(pdata, INT_EN, 0);
2039 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
2040
2041 retval = request_irq(dev->irq, smsc911x_irqhandler,
2042 irq_flags | IRQF_SHARED, dev->name, dev);
2043 if (retval) {
2044 SMSC_WARNING(PROBE,
2045 "Unable to claim requested irq: %d", dev->irq);
2046 goto out_unmap_io_3;
2047 }
2048
2049 platform_set_drvdata(pdev, dev);
2050
2051 retval = register_netdev(dev);
2052 if (retval) {
2053 SMSC_WARNING(PROBE,
2054 "Error %i registering device", retval);
2055 goto out_unset_drvdata_4;
2056 } else {
2057 SMSC_TRACE(PROBE, "Network interface: \"%s\"", dev->name);
2058 }
2059
2060 spin_lock_init(&pdata->mac_lock);
2061
2062 retval = smsc911x_mii_init(pdev, dev);
2063 if (retval) {
2064 SMSC_WARNING(PROBE,
2065 "Error %i initialising mii", retval);
2066 goto out_unregister_netdev_5;
2067 }
2068
2069 spin_lock_irq(&pdata->mac_lock);
2070
2071 /* Check if mac address has been specified when bringing interface up */
2072 if (is_valid_ether_addr(dev->dev_addr)) {
2073 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2074 SMSC_TRACE(PROBE, "MAC Address is specified by configuration");
2075 } else {
2076 /* Try reading mac address from device. if EEPROM is present
2077 * it will already have been set */
2078 smsc911x_read_mac_address(dev);
2079
2080 if (is_valid_ether_addr(dev->dev_addr)) {
2081 /* eeprom values are valid so use them */
2082 SMSC_TRACE(PROBE,
2083 "Mac Address is read from LAN911x EEPROM");
2084 } else {
2085 /* eeprom values are invalid, generate random MAC */
2086 random_ether_addr(dev->dev_addr);
2087 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2088 SMSC_TRACE(PROBE,
2089 "MAC Address is set to random_ether_addr");
2090 }
2091 }
2092
2093 spin_unlock_irq(&pdata->mac_lock);
2094
2095 dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr);
2096
2097 return 0;
2098
2099 out_unregister_netdev_5:
2100 unregister_netdev(dev);
2101 out_unset_drvdata_4:
2102 platform_set_drvdata(pdev, NULL);
2103 free_irq(dev->irq, dev);
2104 out_unmap_io_3:
2105 iounmap(pdata->ioaddr);
2106 out_free_netdev_2:
2107 free_netdev(dev);
2108 out_release_io_1:
2109 release_mem_region(res->start, resource_size(res));
2110 out_0:
2111 return retval;
2112 }
2113
2114 #ifdef CONFIG_PM
2115 /* This implementation assumes the devices remains powered on its VDDVARIO
2116 * pins during suspend. */
2117
2118 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2119
2120 static int smsc911x_suspend(struct device *dev)
2121 {
2122 struct net_device *ndev = dev_get_drvdata(dev);
2123 struct smsc911x_data *pdata = netdev_priv(ndev);
2124
2125 /* enable wake on LAN, energy detection and the external PME
2126 * signal. */
2127 smsc911x_reg_write(pdata, PMT_CTRL,
2128 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2129 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2130
2131 return 0;
2132 }
2133
2134 static int smsc911x_resume(struct device *dev)
2135 {
2136 struct net_device *ndev = dev_get_drvdata(dev);
2137 struct smsc911x_data *pdata = netdev_priv(ndev);
2138 unsigned int to = 100;
2139
2140 /* Note 3.11 from the datasheet:
2141 * "When the LAN9220 is in a power saving state, a write of any
2142 * data to the BYTE_TEST register will wake-up the device."
2143 */
2144 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2145
2146 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2147 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2148 * if it failed. */
2149 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2150 udelay(1000);
2151
2152 return (to == 0) ? -EIO : 0;
2153 }
2154
2155 static struct dev_pm_ops smsc911x_pm_ops = {
2156 .suspend = smsc911x_suspend,
2157 .resume = smsc911x_resume,
2158 };
2159
2160 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2161
2162 #else
2163 #define SMSC911X_PM_OPS NULL
2164 #endif
2165
2166 static struct platform_driver smsc911x_driver = {
2167 .probe = smsc911x_drv_probe,
2168 .remove = __devexit_p(smsc911x_drv_remove),
2169 .driver = {
2170 .name = SMSC_CHIPNAME,
2171 .owner = THIS_MODULE,
2172 .pm = SMSC911X_PM_OPS,
2173 },
2174 };
2175
2176 /* Entry point for loading the module */
2177 static int __init smsc911x_init_module(void)
2178 {
2179 return platform_driver_register(&smsc911x_driver);
2180 }
2181
2182 /* entry point for unloading the module */
2183 static void __exit smsc911x_cleanup_module(void)
2184 {
2185 platform_driver_unregister(&smsc911x_driver);
2186 }
2187
2188 module_init(smsc911x_init_module);
2189 module_exit(smsc911x_cleanup_module);
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