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firewire: sbp2: fix stall with "Unsolicited response"
[firewire-audio.git] / drivers / net / smsc911x.c
blobcc559741b0facf24b076e8b96eabe1c90ad78170
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/timer.h>
45 #include <linux/bug.h>
46 #include <linux/bitops.h>
47 #include <linux/irq.h>
48 #include <linux/io.h>
49 #include <linux/swab.h>
50 #include <linux/phy.h>
51 #include <linux/smsc911x.h>
52 #include <linux/device.h>
53 #include "smsc911x.h"
54
55 #define SMSC_CHIPNAME "smsc911x"
56 #define SMSC_MDIONAME "smsc911x-mdio"
57 #define SMSC_DRV_VERSION "2008-10-21"
58
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(SMSC_DRV_VERSION);
61
62 #if USE_DEBUG > 0
63 static int debug = 16;
64 #else
65 static int debug = 3;
66 #endif
67
68 module_param(debug, int, 0);
69 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
70
71 struct smsc911x_data {
72 void __iomem *ioaddr;
73
74 unsigned int idrev;
75
76 /* used to decide which workarounds apply */
77 unsigned int generation;
78
79 /* device configuration (copied from platform_data during probe) */
80 struct smsc911x_platform_config config;
81
82 /* This needs to be acquired before calling any of below:
83 * smsc911x_mac_read(), smsc911x_mac_write()
84 */
85 spinlock_t mac_lock;
86
87 /* spinlock to ensure 16-bit accesses are serialised.
88 * unused with a 32-bit bus */
89 spinlock_t dev_lock;
90
91 struct phy_device *phy_dev;
92 struct mii_bus *mii_bus;
93 int phy_irq[PHY_MAX_ADDR];
94 unsigned int using_extphy;
95 int last_duplex;
96 int last_carrier;
97
98 u32 msg_enable;
99 unsigned int gpio_setting;
100 unsigned int gpio_orig_setting;
101 struct net_device *dev;
102 struct napi_struct napi;
103
104 unsigned int software_irq_signal;
105
106 #ifdef USE_PHY_WORK_AROUND
107 #define MIN_PACKET_SIZE (64)
108 char loopback_tx_pkt[MIN_PACKET_SIZE];
109 char loopback_rx_pkt[MIN_PACKET_SIZE];
110 unsigned int resetcount;
111 #endif
112
113 /* Members for Multicast filter workaround */
114 unsigned int multicast_update_pending;
115 unsigned int set_bits_mask;
116 unsigned int clear_bits_mask;
117 unsigned int hashhi;
118 unsigned int hashlo;
119 };
120
121 /* The 16-bit access functions are significantly slower, due to the locking
122 * necessary. If your bus hardware can be configured to do this for you
123 * (in response to a single 32-bit operation from software), you should use
124 * the 32-bit access functions instead. */
125
126 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
127 {
128 if (pdata->config.flags & SMSC911X_USE_32BIT)
129 return readl(pdata->ioaddr + reg);
130
131 if (pdata->config.flags & SMSC911X_USE_16BIT) {
132 u32 data;
133 unsigned long flags;
134
135 /* these two 16-bit reads must be performed consecutively, so
136 * must not be interrupted by our own ISR (which would start
137 * another read operation) */
138 spin_lock_irqsave(&pdata->dev_lock, flags);
139 data = ((readw(pdata->ioaddr + reg) & 0xFFFF) |
140 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
141 spin_unlock_irqrestore(&pdata->dev_lock, flags);
142
143 return data;
144 }
145
146 BUG();
147 return 0;
148 }
149
150 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
151 u32 val)
152 {
153 if (pdata->config.flags & SMSC911X_USE_32BIT) {
154 writel(val, pdata->ioaddr + reg);
155 return;
156 }
157
158 if (pdata->config.flags & SMSC911X_USE_16BIT) {
159 unsigned long flags;
160
161 /* these two 16-bit writes must be performed consecutively, so
162 * must not be interrupted by our own ISR (which would start
163 * another read operation) */
164 spin_lock_irqsave(&pdata->dev_lock, flags);
165 writew(val & 0xFFFF, pdata->ioaddr + reg);
166 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
167 spin_unlock_irqrestore(&pdata->dev_lock, flags);
168 return;
169 }
170
171 BUG();
172 }
173
174 /* Writes a packet to the TX_DATA_FIFO */
175 static inline void
176 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
177 unsigned int wordcount)
178 {
179 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
180 while (wordcount--)
181 smsc911x_reg_write(pdata, TX_DATA_FIFO, swab32(*buf++));
182 return;
183 }
184
185 if (pdata->config.flags & SMSC911X_USE_32BIT) {
186 writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
187 return;
188 }
189
190 if (pdata->config.flags & SMSC911X_USE_16BIT) {
191 while (wordcount--)
192 smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
193 return;
194 }
195
196 BUG();
197 }
198
199 /* Reads a packet out of the RX_DATA_FIFO */
200 static inline void
201 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
202 unsigned int wordcount)
203 {
204 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
205 while (wordcount--)
206 *buf++ = swab32(smsc911x_reg_read(pdata, RX_DATA_FIFO));
207 return;
208 }
209
210 if (pdata->config.flags & SMSC911X_USE_32BIT) {
211 readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
212 return;
213 }
214
215 if (pdata->config.flags & SMSC911X_USE_16BIT) {
216 while (wordcount--)
217 *buf++ = smsc911x_reg_read(pdata, RX_DATA_FIFO);
218 return;
219 }
220
221 BUG();
222 }
223
224 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
225 * and smsc911x_mac_write, so assumes mac_lock is held */
226 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
227 {
228 int i;
229 u32 val;
230
231 SMSC_ASSERT_MAC_LOCK(pdata);
232
233 for (i = 0; i < 40; i++) {
234 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
235 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
236 return 0;
237 }
238 SMSC_WARNING(HW, "Timed out waiting for MAC not BUSY. "
239 "MAC_CSR_CMD: 0x%08X", val);
240 return -EIO;
241 }
242
243 /* Fetches a MAC register value. Assumes mac_lock is acquired */
244 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
245 {
246 unsigned int temp;
247
248 SMSC_ASSERT_MAC_LOCK(pdata);
249
250 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
251 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
252 SMSC_WARNING(HW, "MAC busy at entry");
253 return 0xFFFFFFFF;
254 }
255
256 /* Send the MAC cmd */
257 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
258 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
259
260 /* Workaround for hardware read-after-write restriction */
261 temp = smsc911x_reg_read(pdata, BYTE_TEST);
262
263 /* Wait for the read to complete */
264 if (likely(smsc911x_mac_complete(pdata) == 0))
265 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
266
267 SMSC_WARNING(HW, "MAC busy after read");
268 return 0xFFFFFFFF;
269 }
270
271 /* Set a mac register, mac_lock must be acquired before calling */
272 static void smsc911x_mac_write(struct smsc911x_data *pdata,
273 unsigned int offset, u32 val)
274 {
275 unsigned int temp;
276
277 SMSC_ASSERT_MAC_LOCK(pdata);
278
279 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
280 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
281 SMSC_WARNING(HW,
282 "smsc911x_mac_write failed, MAC busy at entry");
283 return;
284 }
285
286 /* Send data to write */
287 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
288
289 /* Write the actual data */
290 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
291 MAC_CSR_CMD_CSR_BUSY_));
292
293 /* Workaround for hardware read-after-write restriction */
294 temp = smsc911x_reg_read(pdata, BYTE_TEST);
295
296 /* Wait for the write to complete */
297 if (likely(smsc911x_mac_complete(pdata) == 0))
298 return;
299
300 SMSC_WARNING(HW,
301 "smsc911x_mac_write failed, MAC busy after write");
302 }
303
304 /* Get a phy register */
305 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
306 {
307 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
308 unsigned long flags;
309 unsigned int addr;
310 int i, reg;
311
312 spin_lock_irqsave(&pdata->mac_lock, flags);
313
314 /* Confirm MII not busy */
315 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
316 SMSC_WARNING(HW,
317 "MII is busy in smsc911x_mii_read???");
318 reg = -EIO;
319 goto out;
320 }
321
322 /* Set the address, index & direction (read from PHY) */
323 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
324 smsc911x_mac_write(pdata, MII_ACC, addr);
325
326 /* Wait for read to complete w/ timeout */
327 for (i = 0; i < 100; i++)
328 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
329 reg = smsc911x_mac_read(pdata, MII_DATA);
330 goto out;
331 }
332
333 SMSC_WARNING(HW, "Timed out waiting for MII read to finish");
334 reg = -EIO;
335
336 out:
337 spin_unlock_irqrestore(&pdata->mac_lock, flags);
338 return reg;
339 }
340
341 /* Set a phy register */
342 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
343 u16 val)
344 {
345 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
346 unsigned long flags;
347 unsigned int addr;
348 int i, reg;
349
350 spin_lock_irqsave(&pdata->mac_lock, flags);
351
352 /* Confirm MII not busy */
353 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
354 SMSC_WARNING(HW,
355 "MII is busy in smsc911x_mii_write???");
356 reg = -EIO;
357 goto out;
358 }
359
360 /* Put the data to write in the MAC */
361 smsc911x_mac_write(pdata, MII_DATA, val);
362
363 /* Set the address, index & direction (write to PHY) */
364 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
365 MII_ACC_MII_WRITE_;
366 smsc911x_mac_write(pdata, MII_ACC, addr);
367
368 /* Wait for write to complete w/ timeout */
369 for (i = 0; i < 100; i++)
370 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
371 reg = 0;
372 goto out;
373 }
374
375 SMSC_WARNING(HW, "Timed out waiting for MII write to finish");
376 reg = -EIO;
377
378 out:
379 spin_unlock_irqrestore(&pdata->mac_lock, flags);
380 return reg;
381 }
382
383 /* Switch to external phy. Assumes tx and rx are stopped. */
384 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
385 {
386 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
387
388 /* Disable phy clocks to the MAC */
389 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
390 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
391 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
392 udelay(10); /* Enough time for clocks to stop */
393
394 /* Switch to external phy */
395 hwcfg |= HW_CFG_EXT_PHY_EN_;
396 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
397
398 /* Enable phy clocks to the MAC */
399 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
400 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
401 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
402 udelay(10); /* Enough time for clocks to restart */
403
404 hwcfg |= HW_CFG_SMI_SEL_;
405 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
406 }
407
408 /* Autodetects and enables external phy if present on supported chips.
409 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
410 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
411 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
412 {
413 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
414
415 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
416 SMSC_TRACE(HW, "Forcing internal PHY");
417 pdata->using_extphy = 0;
418 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
419 SMSC_TRACE(HW, "Forcing external PHY");
420 smsc911x_phy_enable_external(pdata);
421 pdata->using_extphy = 1;
422 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
423 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET set, using external PHY");
424 smsc911x_phy_enable_external(pdata);
425 pdata->using_extphy = 1;
426 } else {
427 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET clear, using internal PHY");
428 pdata->using_extphy = 0;
429 }
430 }
431
432 /* Fetches a tx status out of the status fifo */
433 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
434 {
435 unsigned int result =
436 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
437
438 if (result != 0)
439 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
440
441 return result;
442 }
443
444 /* Fetches the next rx status */
445 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
446 {
447 unsigned int result =
448 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
449
450 if (result != 0)
451 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
452
453 return result;
454 }
455
456 #ifdef USE_PHY_WORK_AROUND
457 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
458 {
459 unsigned int tries;
460 u32 wrsz;
461 u32 rdsz;
462 ulong bufp;
463
464 for (tries = 0; tries < 10; tries++) {
465 unsigned int txcmd_a;
466 unsigned int txcmd_b;
467 unsigned int status;
468 unsigned int pktlength;
469 unsigned int i;
470
471 /* Zero-out rx packet memory */
472 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
473
474 /* Write tx packet to 118 */
475 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
476 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
477 txcmd_a |= MIN_PACKET_SIZE;
478
479 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
480
481 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
482 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
483
484 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
485 wrsz = MIN_PACKET_SIZE + 3;
486 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
487 wrsz >>= 2;
488
489 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
490
491 /* Wait till transmit is done */
492 i = 60;
493 do {
494 udelay(5);
495 status = smsc911x_tx_get_txstatus(pdata);
496 } while ((i--) && (!status));
497
498 if (!status) {
499 SMSC_WARNING(HW, "Failed to transmit "
500 "during loopback test");
501 continue;
502 }
503 if (status & TX_STS_ES_) {
504 SMSC_WARNING(HW, "Transmit encountered "
505 "errors during loopback test");
506 continue;
507 }
508
509 /* Wait till receive is done */
510 i = 60;
511 do {
512 udelay(5);
513 status = smsc911x_rx_get_rxstatus(pdata);
514 } while ((i--) && (!status));
515
516 if (!status) {
517 SMSC_WARNING(HW,
518 "Failed to receive during loopback test");
519 continue;
520 }
521 if (status & RX_STS_ES_) {
522 SMSC_WARNING(HW, "Receive encountered "
523 "errors during loopback test");
524 continue;
525 }
526
527 pktlength = ((status & 0x3FFF0000UL) >> 16);
528 bufp = (ulong)pdata->loopback_rx_pkt;
529 rdsz = pktlength + 3;
530 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
531 rdsz >>= 2;
532
533 smsc911x_rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
534
535 if (pktlength != (MIN_PACKET_SIZE + 4)) {
536 SMSC_WARNING(HW, "Unexpected packet size "
537 "during loop back test, size=%d, will retry",
538 pktlength);
539 } else {
540 unsigned int j;
541 int mismatch = 0;
542 for (j = 0; j < MIN_PACKET_SIZE; j++) {
543 if (pdata->loopback_tx_pkt[j]
544 != pdata->loopback_rx_pkt[j]) {
545 mismatch = 1;
546 break;
547 }
548 }
549 if (!mismatch) {
550 SMSC_TRACE(HW, "Successfully verified "
551 "loopback packet");
552 return 0;
553 } else {
554 SMSC_WARNING(HW, "Data mismatch "
555 "during loop back test, will retry");
556 }
557 }
558 }
559
560 return -EIO;
561 }
562
563 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
564 {
565 struct phy_device *phy_dev = pdata->phy_dev;
566 unsigned int temp;
567 unsigned int i = 100000;
568
569 BUG_ON(!phy_dev);
570 BUG_ON(!phy_dev->bus);
571
572 SMSC_TRACE(HW, "Performing PHY BCR Reset");
573 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
574 do {
575 msleep(1);
576 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
577 MII_BMCR);
578 } while ((i--) && (temp & BMCR_RESET));
579
580 if (temp & BMCR_RESET) {
581 SMSC_WARNING(HW, "PHY reset failed to complete.");
582 return -EIO;
583 }
584 /* Extra delay required because the phy may not be completed with
585 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
586 * enough delay but using 1ms here to be safe */
587 msleep(1);
588
589 return 0;
590 }
591
592 static int smsc911x_phy_loopbacktest(struct net_device *dev)
593 {
594 struct smsc911x_data *pdata = netdev_priv(dev);
595 struct phy_device *phy_dev = pdata->phy_dev;
596 int result = -EIO;
597 unsigned int i, val;
598 unsigned long flags;
599
600 /* Initialise tx packet using broadcast destination address */
601 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN);
602
603 /* Use incrementing source address */
604 for (i = 6; i < 12; i++)
605 pdata->loopback_tx_pkt[i] = (char)i;
606
607 /* Set length type field */
608 pdata->loopback_tx_pkt[12] = 0x00;
609 pdata->loopback_tx_pkt[13] = 0x00;
610
611 for (i = 14; i < MIN_PACKET_SIZE; i++)
612 pdata->loopback_tx_pkt[i] = (char)i;
613
614 val = smsc911x_reg_read(pdata, HW_CFG);
615 val &= HW_CFG_TX_FIF_SZ_;
616 val |= HW_CFG_SF_;
617 smsc911x_reg_write(pdata, HW_CFG, val);
618
619 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
620 smsc911x_reg_write(pdata, RX_CFG,
621 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
622
623 for (i = 0; i < 10; i++) {
624 /* Set PHY to 10/FD, no ANEG, and loopback mode */
625 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR,
626 BMCR_LOOPBACK | BMCR_FULLDPLX);
627
628 /* Enable MAC tx/rx, FD */
629 spin_lock_irqsave(&pdata->mac_lock, flags);
630 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
631 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
632 spin_unlock_irqrestore(&pdata->mac_lock, flags);
633
634 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
635 result = 0;
636 break;
637 }
638 pdata->resetcount++;
639
640 /* Disable MAC rx */
641 spin_lock_irqsave(&pdata->mac_lock, flags);
642 smsc911x_mac_write(pdata, MAC_CR, 0);
643 spin_unlock_irqrestore(&pdata->mac_lock, flags);
644
645 smsc911x_phy_reset(pdata);
646 }
647
648 /* Disable MAC */
649 spin_lock_irqsave(&pdata->mac_lock, flags);
650 smsc911x_mac_write(pdata, MAC_CR, 0);
651 spin_unlock_irqrestore(&pdata->mac_lock, flags);
652
653 /* Cancel PHY loopback mode */
654 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
655
656 smsc911x_reg_write(pdata, TX_CFG, 0);
657 smsc911x_reg_write(pdata, RX_CFG, 0);
658
659 return result;
660 }
661 #endif /* USE_PHY_WORK_AROUND */
662
663 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
664 {
665 struct phy_device *phy_dev = pdata->phy_dev;
666 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
667 u32 flow;
668 unsigned long flags;
669
670 if (phy_dev->duplex == DUPLEX_FULL) {
671 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
672 u16 rmtadv = phy_read(phy_dev, MII_LPA);
673 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
674
675 if (cap & FLOW_CTRL_RX)
676 flow = 0xFFFF0002;
677 else
678 flow = 0;
679
680 if (cap & FLOW_CTRL_TX)
681 afc |= 0xF;
682 else
683 afc &= ~0xF;
684
685 SMSC_TRACE(HW, "rx pause %s, tx pause %s",
686 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
687 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
688 } else {
689 SMSC_TRACE(HW, "half duplex");
690 flow = 0;
691 afc |= 0xF;
692 }
693
694 spin_lock_irqsave(&pdata->mac_lock, flags);
695 smsc911x_mac_write(pdata, FLOW, flow);
696 spin_unlock_irqrestore(&pdata->mac_lock, flags);
697
698 smsc911x_reg_write(pdata, AFC_CFG, afc);
699 }
700
701 /* Update link mode if anything has changed. Called periodically when the
702 * PHY is in polling mode, even if nothing has changed. */
703 static void smsc911x_phy_adjust_link(struct net_device *dev)
704 {
705 struct smsc911x_data *pdata = netdev_priv(dev);
706 struct phy_device *phy_dev = pdata->phy_dev;
707 unsigned long flags;
708 int carrier;
709
710 if (phy_dev->duplex != pdata->last_duplex) {
711 unsigned int mac_cr;
712 SMSC_TRACE(HW, "duplex state has changed");
713
714 spin_lock_irqsave(&pdata->mac_lock, flags);
715 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
716 if (phy_dev->duplex) {
717 SMSC_TRACE(HW,
718 "configuring for full duplex mode");
719 mac_cr |= MAC_CR_FDPX_;
720 } else {
721 SMSC_TRACE(HW,
722 "configuring for half duplex mode");
723 mac_cr &= ~MAC_CR_FDPX_;
724 }
725 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
726 spin_unlock_irqrestore(&pdata->mac_lock, flags);
727
728 smsc911x_phy_update_flowcontrol(pdata);
729 pdata->last_duplex = phy_dev->duplex;
730 }
731
732 carrier = netif_carrier_ok(dev);
733 if (carrier != pdata->last_carrier) {
734 SMSC_TRACE(HW, "carrier state has changed");
735 if (carrier) {
736 SMSC_TRACE(HW, "configuring for carrier OK");
737 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
738 (!pdata->using_extphy)) {
739 /* Restore original GPIO configuration */
740 pdata->gpio_setting = pdata->gpio_orig_setting;
741 smsc911x_reg_write(pdata, GPIO_CFG,
742 pdata->gpio_setting);
743 }
744 } else {
745 SMSC_TRACE(HW, "configuring for no carrier");
746 /* Check global setting that LED1
747 * usage is 10/100 indicator */
748 pdata->gpio_setting = smsc911x_reg_read(pdata,
749 GPIO_CFG);
750 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
751 (!pdata->using_extphy)) {
752 /* Force 10/100 LED off, after saving
753 * original GPIO configuration */
754 pdata->gpio_orig_setting = pdata->gpio_setting;
755
756 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
757 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
758 | GPIO_CFG_GPIODIR0_
759 | GPIO_CFG_GPIOD0_);
760 smsc911x_reg_write(pdata, GPIO_CFG,
761 pdata->gpio_setting);
762 }
763 }
764 pdata->last_carrier = carrier;
765 }
766 }
767
768 static int smsc911x_mii_probe(struct net_device *dev)
769 {
770 struct smsc911x_data *pdata = netdev_priv(dev);
771 struct phy_device *phydev = NULL;
772 int ret;
773
774 /* find the first phy */
775 phydev = phy_find_first(pdata->mii_bus);
776 if (!phydev) {
777 pr_err("%s: no PHY found\n", dev->name);
778 return -ENODEV;
779 }
780
781 SMSC_TRACE(PROBE, "PHY %d: addr %d, phy_id 0x%08X",
782 phy_addr, phydev->addr, phydev->phy_id);
783
784 ret = phy_connect_direct(dev, phydev,
785 &smsc911x_phy_adjust_link, 0,
786 pdata->config.phy_interface);
787
788 if (ret) {
789 pr_err("%s: Could not attach to PHY\n", dev->name);
790 return ret;
791 }
792
793 pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
794 dev->name, phydev->drv->name,
795 dev_name(&phydev->dev), phydev->irq);
796
797 /* mask with MAC supported features */
798 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
799 SUPPORTED_Asym_Pause);
800 phydev->advertising = phydev->supported;
801
802 pdata->phy_dev = phydev;
803 pdata->last_duplex = -1;
804 pdata->last_carrier = -1;
805
806 #ifdef USE_PHY_WORK_AROUND
807 if (smsc911x_phy_loopbacktest(dev) < 0) {
808 SMSC_WARNING(HW, "Failed Loop Back Test");
809 return -ENODEV;
810 }
811 SMSC_TRACE(HW, "Passed Loop Back Test");
812 #endif /* USE_PHY_WORK_AROUND */
813
814 SMSC_TRACE(HW, "phy initialised successfully");
815 return 0;
816 }
817
818 static int __devinit smsc911x_mii_init(struct platform_device *pdev,
819 struct net_device *dev)
820 {
821 struct smsc911x_data *pdata = netdev_priv(dev);
822 int err = -ENXIO, i;
823
824 pdata->mii_bus = mdiobus_alloc();
825 if (!pdata->mii_bus) {
826 err = -ENOMEM;
827 goto err_out_1;
828 }
829
830 pdata->mii_bus->name = SMSC_MDIONAME;
831 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id);
832 pdata->mii_bus->priv = pdata;
833 pdata->mii_bus->read = smsc911x_mii_read;
834 pdata->mii_bus->write = smsc911x_mii_write;
835 pdata->mii_bus->irq = pdata->phy_irq;
836 for (i = 0; i < PHY_MAX_ADDR; ++i)
837 pdata->mii_bus->irq[i] = PHY_POLL;
838
839 pdata->mii_bus->parent = &pdev->dev;
840
841 switch (pdata->idrev & 0xFFFF0000) {
842 case 0x01170000:
843 case 0x01150000:
844 case 0x117A0000:
845 case 0x115A0000:
846 /* External PHY supported, try to autodetect */
847 smsc911x_phy_initialise_external(pdata);
848 break;
849 default:
850 SMSC_TRACE(HW, "External PHY is not supported, "
851 "using internal PHY");
852 pdata->using_extphy = 0;
853 break;
854 }
855
856 if (!pdata->using_extphy) {
857 /* Mask all PHYs except ID 1 (internal) */
858 pdata->mii_bus->phy_mask = ~(1 << 1);
859 }
860
861 if (mdiobus_register(pdata->mii_bus)) {
862 SMSC_WARNING(PROBE, "Error registering mii bus");
863 goto err_out_free_bus_2;
864 }
865
866 if (smsc911x_mii_probe(dev) < 0) {
867 SMSC_WARNING(PROBE, "Error registering mii bus");
868 goto err_out_unregister_bus_3;
869 }
870
871 return 0;
872
873 err_out_unregister_bus_3:
874 mdiobus_unregister(pdata->mii_bus);
875 err_out_free_bus_2:
876 mdiobus_free(pdata->mii_bus);
877 err_out_1:
878 return err;
879 }
880
881 /* Gets the number of tx statuses in the fifo */
882 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
883 {
884 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
885 & TX_FIFO_INF_TSUSED_) >> 16;
886 }
887
888 /* Reads tx statuses and increments counters where necessary */
889 static void smsc911x_tx_update_txcounters(struct net_device *dev)
890 {
891 struct smsc911x_data *pdata = netdev_priv(dev);
892 unsigned int tx_stat;
893
894 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
895 if (unlikely(tx_stat & 0x80000000)) {
896 /* In this driver the packet tag is used as the packet
897 * length. Since a packet length can never reach the
898 * size of 0x8000, this bit is reserved. It is worth
899 * noting that the "reserved bit" in the warning above
900 * does not reference a hardware defined reserved bit
901 * but rather a driver defined one.
902 */
903 SMSC_WARNING(HW,
904 "Packet tag reserved bit is high");
905 } else {
906 if (unlikely(tx_stat & TX_STS_ES_)) {
907 dev->stats.tx_errors++;
908 } else {
909 dev->stats.tx_packets++;
910 dev->stats.tx_bytes += (tx_stat >> 16);
911 }
912 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
913 dev->stats.collisions += 16;
914 dev->stats.tx_aborted_errors += 1;
915 } else {
916 dev->stats.collisions +=
917 ((tx_stat >> 3) & 0xF);
918 }
919 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
920 dev->stats.tx_carrier_errors += 1;
921 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
922 dev->stats.collisions++;
923 dev->stats.tx_aborted_errors++;
924 }
925 }
926 }
927 }
928
929 /* Increments the Rx error counters */
930 static void
931 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
932 {
933 int crc_err = 0;
934
935 if (unlikely(rxstat & RX_STS_ES_)) {
936 dev->stats.rx_errors++;
937 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
938 dev->stats.rx_crc_errors++;
939 crc_err = 1;
940 }
941 }
942 if (likely(!crc_err)) {
943 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
944 (rxstat & RX_STS_LENGTH_ERR_)))
945 dev->stats.rx_length_errors++;
946 if (rxstat & RX_STS_MCAST_)
947 dev->stats.multicast++;
948 }
949 }
950
951 /* Quickly dumps bad packets */
952 static void
953 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes)
954 {
955 unsigned int pktwords = (pktbytes + NET_IP_ALIGN + 3) >> 2;
956
957 if (likely(pktwords >= 4)) {
958 unsigned int timeout = 500;
959 unsigned int val;
960 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
961 do {
962 udelay(1);
963 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
964 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
965
966 if (unlikely(timeout == 0))
967 SMSC_WARNING(HW, "Timed out waiting for "
968 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
969 } else {
970 unsigned int temp;
971 while (pktwords--)
972 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
973 }
974 }
975
976 /* NAPI poll function */
977 static int smsc911x_poll(struct napi_struct *napi, int budget)
978 {
979 struct smsc911x_data *pdata =
980 container_of(napi, struct smsc911x_data, napi);
981 struct net_device *dev = pdata->dev;
982 int npackets = 0;
983
984 while (npackets < budget) {
985 unsigned int pktlength;
986 unsigned int pktwords;
987 struct sk_buff *skb;
988 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
989
990 if (!rxstat) {
991 unsigned int temp;
992 /* We processed all packets available. Tell NAPI it can
993 * stop polling then re-enable rx interrupts */
994 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
995 napi_complete(napi);
996 temp = smsc911x_reg_read(pdata, INT_EN);
997 temp |= INT_EN_RSFL_EN_;
998 smsc911x_reg_write(pdata, INT_EN, temp);
999 break;
1000 }
1001
1002 /* Count packet for NAPI scheduling, even if it has an error.
1003 * Error packets still require cycles to discard */
1004 npackets++;
1005
1006 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1007 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1008 smsc911x_rx_counterrors(dev, rxstat);
1009
1010 if (unlikely(rxstat & RX_STS_ES_)) {
1011 SMSC_WARNING(RX_ERR,
1012 "Discarding packet with error bit set");
1013 /* Packet has an error, discard it and continue with
1014 * the next */
1015 smsc911x_rx_fastforward(pdata, pktwords);
1016 dev->stats.rx_dropped++;
1017 continue;
1018 }
1019
1020 skb = netdev_alloc_skb(dev, pktlength + NET_IP_ALIGN);
1021 if (unlikely(!skb)) {
1022 SMSC_WARNING(RX_ERR,
1023 "Unable to allocate skb for rx packet");
1024 /* Drop the packet and stop this polling iteration */
1025 smsc911x_rx_fastforward(pdata, pktwords);
1026 dev->stats.rx_dropped++;
1027 break;
1028 }
1029
1030 skb->data = skb->head;
1031 skb_reset_tail_pointer(skb);
1032
1033 /* Align IP on 16B boundary */
1034 skb_reserve(skb, NET_IP_ALIGN);
1035 skb_put(skb, pktlength - 4);
1036 smsc911x_rx_readfifo(pdata, (unsigned int *)skb->head,
1037 pktwords);
1038 skb->protocol = eth_type_trans(skb, dev);
1039 skb->ip_summed = CHECKSUM_NONE;
1040 netif_receive_skb(skb);
1041
1042 /* Update counters */
1043 dev->stats.rx_packets++;
1044 dev->stats.rx_bytes += (pktlength - 4);
1045 }
1046
1047 /* Return total received packets */
1048 return npackets;
1049 }
1050
1051 /* Returns hash bit number for given MAC address
1052 * Example:
1053 * 01 00 5E 00 00 01 -> returns bit number 31 */
1054 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1055 {
1056 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1057 }
1058
1059 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1060 {
1061 /* Performs the multicast & mac_cr update. This is called when
1062 * safe on the current hardware, and with the mac_lock held */
1063 unsigned int mac_cr;
1064
1065 SMSC_ASSERT_MAC_LOCK(pdata);
1066
1067 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1068 mac_cr |= pdata->set_bits_mask;
1069 mac_cr &= ~(pdata->clear_bits_mask);
1070 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1071 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1072 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1073 SMSC_TRACE(HW, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1074 mac_cr, pdata->hashhi, pdata->hashlo);
1075 }
1076
1077 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1078 {
1079 unsigned int mac_cr;
1080
1081 /* This function is only called for older LAN911x devices
1082 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1083 * be modified during Rx - newer devices immediately update the
1084 * registers.
1085 *
1086 * This is called from interrupt context */
1087
1088 spin_lock(&pdata->mac_lock);
1089
1090 /* Check Rx has stopped */
1091 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1092 SMSC_WARNING(DRV, "Rx not stopped");
1093
1094 /* Perform the update - safe to do now Rx has stopped */
1095 smsc911x_rx_multicast_update(pdata);
1096
1097 /* Re-enable Rx */
1098 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1099 mac_cr |= MAC_CR_RXEN_;
1100 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1101
1102 pdata->multicast_update_pending = 0;
1103
1104 spin_unlock(&pdata->mac_lock);
1105 }
1106
1107 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1108 {
1109 unsigned int timeout;
1110 unsigned int temp;
1111
1112 /* Reset the LAN911x */
1113 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1114 timeout = 10;
1115 do {
1116 udelay(10);
1117 temp = smsc911x_reg_read(pdata, HW_CFG);
1118 } while ((--timeout) && (temp & HW_CFG_SRST_));
1119
1120 if (unlikely(temp & HW_CFG_SRST_)) {
1121 SMSC_WARNING(DRV, "Failed to complete reset");
1122 return -EIO;
1123 }
1124 return 0;
1125 }
1126
1127 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1128 static void
1129 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1130 {
1131 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1132 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1133 (dev_addr[1] << 8) | dev_addr[0];
1134
1135 SMSC_ASSERT_MAC_LOCK(pdata);
1136
1137 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1138 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1139 }
1140
1141 static int smsc911x_open(struct net_device *dev)
1142 {
1143 struct smsc911x_data *pdata = netdev_priv(dev);
1144 unsigned int timeout;
1145 unsigned int temp;
1146 unsigned int intcfg;
1147
1148 /* if the phy is not yet registered, retry later*/
1149 if (!pdata->phy_dev) {
1150 SMSC_WARNING(HW, "phy_dev is NULL");
1151 return -EAGAIN;
1152 }
1153
1154 if (!is_valid_ether_addr(dev->dev_addr)) {
1155 SMSC_WARNING(HW, "dev_addr is not a valid MAC address");
1156 return -EADDRNOTAVAIL;
1157 }
1158
1159 /* Reset the LAN911x */
1160 if (smsc911x_soft_reset(pdata)) {
1161 SMSC_WARNING(HW, "soft reset failed");
1162 return -EIO;
1163 }
1164
1165 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1166 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1167
1168 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1169 timeout = 50;
1170 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1171 --timeout) {
1172 udelay(10);
1173 }
1174
1175 if (unlikely(timeout == 0))
1176 SMSC_WARNING(IFUP,
1177 "Timed out waiting for EEPROM busy bit to clear");
1178
1179 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1180
1181 /* The soft reset above cleared the device's MAC address,
1182 * restore it from local copy (set in probe) */
1183 spin_lock_irq(&pdata->mac_lock);
1184 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1185 spin_unlock_irq(&pdata->mac_lock);
1186
1187 /* Initialise irqs, but leave all sources disabled */
1188 smsc911x_reg_write(pdata, INT_EN, 0);
1189 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1190
1191 /* Set interrupt deassertion to 100uS */
1192 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1193
1194 if (pdata->config.irq_polarity) {
1195 SMSC_TRACE(IFUP, "irq polarity: active high");
1196 intcfg |= INT_CFG_IRQ_POL_;
1197 } else {
1198 SMSC_TRACE(IFUP, "irq polarity: active low");
1199 }
1200
1201 if (pdata->config.irq_type) {
1202 SMSC_TRACE(IFUP, "irq type: push-pull");
1203 intcfg |= INT_CFG_IRQ_TYPE_;
1204 } else {
1205 SMSC_TRACE(IFUP, "irq type: open drain");
1206 }
1207
1208 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1209
1210 SMSC_TRACE(IFUP, "Testing irq handler using IRQ %d", dev->irq);
1211 pdata->software_irq_signal = 0;
1212 smp_wmb();
1213
1214 temp = smsc911x_reg_read(pdata, INT_EN);
1215 temp |= INT_EN_SW_INT_EN_;
1216 smsc911x_reg_write(pdata, INT_EN, temp);
1217
1218 timeout = 1000;
1219 while (timeout--) {
1220 if (pdata->software_irq_signal)
1221 break;
1222 msleep(1);
1223 }
1224
1225 if (!pdata->software_irq_signal) {
1226 dev_warn(&dev->dev, "ISR failed signaling test (IRQ %d)\n",
1227 dev->irq);
1228 return -ENODEV;
1229 }
1230 SMSC_TRACE(IFUP, "IRQ handler passed test using IRQ %d", dev->irq);
1231
1232 dev_info(&dev->dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1233 (unsigned long)pdata->ioaddr, dev->irq);
1234
1235 /* Reset the last known duplex and carrier */
1236 pdata->last_duplex = -1;
1237 pdata->last_carrier = -1;
1238
1239 /* Bring the PHY up */
1240 phy_start(pdata->phy_dev);
1241
1242 temp = smsc911x_reg_read(pdata, HW_CFG);
1243 /* Preserve TX FIFO size and external PHY configuration */
1244 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1245 temp |= HW_CFG_SF_;
1246 smsc911x_reg_write(pdata, HW_CFG, temp);
1247
1248 temp = smsc911x_reg_read(pdata, FIFO_INT);
1249 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1250 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1251 smsc911x_reg_write(pdata, FIFO_INT, temp);
1252
1253 /* set RX Data offset to 2 bytes for alignment */
1254 smsc911x_reg_write(pdata, RX_CFG, (2 << 8));
1255
1256 /* enable NAPI polling before enabling RX interrupts */
1257 napi_enable(&pdata->napi);
1258
1259 temp = smsc911x_reg_read(pdata, INT_EN);
1260 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1261 smsc911x_reg_write(pdata, INT_EN, temp);
1262
1263 spin_lock_irq(&pdata->mac_lock);
1264 temp = smsc911x_mac_read(pdata, MAC_CR);
1265 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1266 smsc911x_mac_write(pdata, MAC_CR, temp);
1267 spin_unlock_irq(&pdata->mac_lock);
1268
1269 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1270
1271 netif_start_queue(dev);
1272 return 0;
1273 }
1274
1275 /* Entry point for stopping the interface */
1276 static int smsc911x_stop(struct net_device *dev)
1277 {
1278 struct smsc911x_data *pdata = netdev_priv(dev);
1279 unsigned int temp;
1280
1281 /* Disable all device interrupts */
1282 temp = smsc911x_reg_read(pdata, INT_CFG);
1283 temp &= ~INT_CFG_IRQ_EN_;
1284 smsc911x_reg_write(pdata, INT_CFG, temp);
1285
1286 /* Stop Tx and Rx polling */
1287 netif_stop_queue(dev);
1288 napi_disable(&pdata->napi);
1289
1290 /* At this point all Rx and Tx activity is stopped */
1291 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1292 smsc911x_tx_update_txcounters(dev);
1293
1294 /* Bring the PHY down */
1295 if (pdata->phy_dev)
1296 phy_stop(pdata->phy_dev);
1297
1298 SMSC_TRACE(IFDOWN, "Interface stopped");
1299 return 0;
1300 }
1301
1302 /* Entry point for transmitting a packet */
1303 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1304 {
1305 struct smsc911x_data *pdata = netdev_priv(dev);
1306 unsigned int freespace;
1307 unsigned int tx_cmd_a;
1308 unsigned int tx_cmd_b;
1309 unsigned int temp;
1310 u32 wrsz;
1311 ulong bufp;
1312
1313 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1314
1315 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1316 SMSC_WARNING(TX_ERR,
1317 "Tx data fifo low, space available: %d", freespace);
1318
1319 /* Word alignment adjustment */
1320 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1321 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1322 tx_cmd_a |= (unsigned int)skb->len;
1323
1324 tx_cmd_b = ((unsigned int)skb->len) << 16;
1325 tx_cmd_b |= (unsigned int)skb->len;
1326
1327 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1328 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1329
1330 bufp = (ulong)skb->data & (~0x3);
1331 wrsz = (u32)skb->len + 3;
1332 wrsz += (u32)((ulong)skb->data & 0x3);
1333 wrsz >>= 2;
1334
1335 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1336 freespace -= (skb->len + 32);
1337 dev_kfree_skb(skb);
1338
1339 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1340 smsc911x_tx_update_txcounters(dev);
1341
1342 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1343 netif_stop_queue(dev);
1344 temp = smsc911x_reg_read(pdata, FIFO_INT);
1345 temp &= 0x00FFFFFF;
1346 temp |= 0x32000000;
1347 smsc911x_reg_write(pdata, FIFO_INT, temp);
1348 }
1349
1350 return NETDEV_TX_OK;
1351 }
1352
1353 /* Entry point for getting status counters */
1354 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1355 {
1356 struct smsc911x_data *pdata = netdev_priv(dev);
1357 smsc911x_tx_update_txcounters(dev);
1358 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1359 return &dev->stats;
1360 }
1361
1362 /* Entry point for setting addressing modes */
1363 static void smsc911x_set_multicast_list(struct net_device *dev)
1364 {
1365 struct smsc911x_data *pdata = netdev_priv(dev);
1366 unsigned long flags;
1367
1368 if (dev->flags & IFF_PROMISC) {
1369 /* Enabling promiscuous mode */
1370 pdata->set_bits_mask = MAC_CR_PRMS_;
1371 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1372 pdata->hashhi = 0;
1373 pdata->hashlo = 0;
1374 } else if (dev->flags & IFF_ALLMULTI) {
1375 /* Enabling all multicast mode */
1376 pdata->set_bits_mask = MAC_CR_MCPAS_;
1377 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1378 pdata->hashhi = 0;
1379 pdata->hashlo = 0;
1380 } else if (!netdev_mc_empty(dev)) {
1381 /* Enabling specific multicast addresses */
1382 unsigned int hash_high = 0;
1383 unsigned int hash_low = 0;
1384 struct netdev_hw_addr *ha;
1385
1386 pdata->set_bits_mask = MAC_CR_HPFILT_;
1387 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1388
1389 netdev_for_each_mc_addr(ha, dev) {
1390 unsigned int bitnum = smsc911x_hash(ha->addr);
1391 unsigned int mask = 0x01 << (bitnum & 0x1F);
1392
1393 if (bitnum & 0x20)
1394 hash_high |= mask;
1395 else
1396 hash_low |= mask;
1397 }
1398
1399 pdata->hashhi = hash_high;
1400 pdata->hashlo = hash_low;
1401 } else {
1402 /* Enabling local MAC address only */
1403 pdata->set_bits_mask = 0;
1404 pdata->clear_bits_mask =
1405 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1406 pdata->hashhi = 0;
1407 pdata->hashlo = 0;
1408 }
1409
1410 spin_lock_irqsave(&pdata->mac_lock, flags);
1411
1412 if (pdata->generation <= 1) {
1413 /* Older hardware revision - cannot change these flags while
1414 * receiving data */
1415 if (!pdata->multicast_update_pending) {
1416 unsigned int temp;
1417 SMSC_TRACE(HW, "scheduling mcast update");
1418 pdata->multicast_update_pending = 1;
1419
1420 /* Request the hardware to stop, then perform the
1421 * update when we get an RX_STOP interrupt */
1422 temp = smsc911x_mac_read(pdata, MAC_CR);
1423 temp &= ~(MAC_CR_RXEN_);
1424 smsc911x_mac_write(pdata, MAC_CR, temp);
1425 } else {
1426 /* There is another update pending, this should now
1427 * use the newer values */
1428 }
1429 } else {
1430 /* Newer hardware revision - can write immediately */
1431 smsc911x_rx_multicast_update(pdata);
1432 }
1433
1434 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1435 }
1436
1437 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1438 {
1439 struct net_device *dev = dev_id;
1440 struct smsc911x_data *pdata = netdev_priv(dev);
1441 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1442 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1443 int serviced = IRQ_NONE;
1444 u32 temp;
1445
1446 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1447 temp = smsc911x_reg_read(pdata, INT_EN);
1448 temp &= (~INT_EN_SW_INT_EN_);
1449 smsc911x_reg_write(pdata, INT_EN, temp);
1450 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1451 pdata->software_irq_signal = 1;
1452 smp_wmb();
1453 serviced = IRQ_HANDLED;
1454 }
1455
1456 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1457 /* Called when there is a multicast update scheduled and
1458 * it is now safe to complete the update */
1459 SMSC_TRACE(INTR, "RX Stop interrupt");
1460 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1461 if (pdata->multicast_update_pending)
1462 smsc911x_rx_multicast_update_workaround(pdata);
1463 serviced = IRQ_HANDLED;
1464 }
1465
1466 if (intsts & inten & INT_STS_TDFA_) {
1467 temp = smsc911x_reg_read(pdata, FIFO_INT);
1468 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1469 smsc911x_reg_write(pdata, FIFO_INT, temp);
1470 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1471 netif_wake_queue(dev);
1472 serviced = IRQ_HANDLED;
1473 }
1474
1475 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1476 SMSC_TRACE(INTR, "RX Error interrupt");
1477 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1478 serviced = IRQ_HANDLED;
1479 }
1480
1481 if (likely(intsts & inten & INT_STS_RSFL_)) {
1482 if (likely(napi_schedule_prep(&pdata->napi))) {
1483 /* Disable Rx interrupts */
1484 temp = smsc911x_reg_read(pdata, INT_EN);
1485 temp &= (~INT_EN_RSFL_EN_);
1486 smsc911x_reg_write(pdata, INT_EN, temp);
1487 /* Schedule a NAPI poll */
1488 __napi_schedule(&pdata->napi);
1489 } else {
1490 SMSC_WARNING(RX_ERR,
1491 "napi_schedule_prep failed");
1492 }
1493 serviced = IRQ_HANDLED;
1494 }
1495
1496 return serviced;
1497 }
1498
1499 #ifdef CONFIG_NET_POLL_CONTROLLER
1500 static void smsc911x_poll_controller(struct net_device *dev)
1501 {
1502 disable_irq(dev->irq);
1503 smsc911x_irqhandler(0, dev);
1504 enable_irq(dev->irq);
1505 }
1506 #endif /* CONFIG_NET_POLL_CONTROLLER */
1507
1508 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1509 {
1510 struct smsc911x_data *pdata = netdev_priv(dev);
1511 struct sockaddr *addr = p;
1512
1513 /* On older hardware revisions we cannot change the mac address
1514 * registers while receiving data. Newer devices can safely change
1515 * this at any time. */
1516 if (pdata->generation <= 1 && netif_running(dev))
1517 return -EBUSY;
1518
1519 if (!is_valid_ether_addr(addr->sa_data))
1520 return -EADDRNOTAVAIL;
1521
1522 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1523
1524 spin_lock_irq(&pdata->mac_lock);
1525 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1526 spin_unlock_irq(&pdata->mac_lock);
1527
1528 dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr);
1529
1530 return 0;
1531 }
1532
1533 /* Standard ioctls for mii-tool */
1534 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1535 {
1536 struct smsc911x_data *pdata = netdev_priv(dev);
1537
1538 if (!netif_running(dev) || !pdata->phy_dev)
1539 return -EINVAL;
1540
1541 return phy_mii_ioctl(pdata->phy_dev, if_mii(ifr), cmd);
1542 }
1543
1544 static int
1545 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1546 {
1547 struct smsc911x_data *pdata = netdev_priv(dev);
1548
1549 cmd->maxtxpkt = 1;
1550 cmd->maxrxpkt = 1;
1551 return phy_ethtool_gset(pdata->phy_dev, cmd);
1552 }
1553
1554 static int
1555 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1556 {
1557 struct smsc911x_data *pdata = netdev_priv(dev);
1558
1559 return phy_ethtool_sset(pdata->phy_dev, cmd);
1560 }
1561
1562 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1563 struct ethtool_drvinfo *info)
1564 {
1565 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1566 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1567 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1568 sizeof(info->bus_info));
1569 }
1570
1571 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1572 {
1573 struct smsc911x_data *pdata = netdev_priv(dev);
1574
1575 return phy_start_aneg(pdata->phy_dev);
1576 }
1577
1578 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1579 {
1580 struct smsc911x_data *pdata = netdev_priv(dev);
1581 return pdata->msg_enable;
1582 }
1583
1584 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1585 {
1586 struct smsc911x_data *pdata = netdev_priv(dev);
1587 pdata->msg_enable = level;
1588 }
1589
1590 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1591 {
1592 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1593 sizeof(u32);
1594 }
1595
1596 static void
1597 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1598 void *buf)
1599 {
1600 struct smsc911x_data *pdata = netdev_priv(dev);
1601 struct phy_device *phy_dev = pdata->phy_dev;
1602 unsigned long flags;
1603 unsigned int i;
1604 unsigned int j = 0;
1605 u32 *data = buf;
1606
1607 regs->version = pdata->idrev;
1608 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1609 data[j++] = smsc911x_reg_read(pdata, i);
1610
1611 for (i = MAC_CR; i <= WUCSR; i++) {
1612 spin_lock_irqsave(&pdata->mac_lock, flags);
1613 data[j++] = smsc911x_mac_read(pdata, i);
1614 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1615 }
1616
1617 for (i = 0; i <= 31; i++)
1618 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
1619 }
1620
1621 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
1622 {
1623 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
1624 temp &= ~GPIO_CFG_EEPR_EN_;
1625 smsc911x_reg_write(pdata, GPIO_CFG, temp);
1626 msleep(1);
1627 }
1628
1629 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
1630 {
1631 int timeout = 100;
1632 u32 e2cmd;
1633
1634 SMSC_TRACE(DRV, "op 0x%08x", op);
1635 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
1636 SMSC_WARNING(DRV, "Busy at start");
1637 return -EBUSY;
1638 }
1639
1640 e2cmd = op | E2P_CMD_EPC_BUSY_;
1641 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
1642
1643 do {
1644 msleep(1);
1645 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
1646 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
1647
1648 if (!timeout) {
1649 SMSC_TRACE(DRV, "TIMED OUT");
1650 return -EAGAIN;
1651 }
1652
1653 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
1654 SMSC_TRACE(DRV, "Error occured during eeprom operation");
1655 return -EINVAL;
1656 }
1657
1658 return 0;
1659 }
1660
1661 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
1662 u8 address, u8 *data)
1663 {
1664 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
1665 int ret;
1666
1667 SMSC_TRACE(DRV, "address 0x%x", address);
1668 ret = smsc911x_eeprom_send_cmd(pdata, op);
1669
1670 if (!ret)
1671 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
1672
1673 return ret;
1674 }
1675
1676 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
1677 u8 address, u8 data)
1678 {
1679 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
1680 u32 temp;
1681 int ret;
1682
1683 SMSC_TRACE(DRV, "address 0x%x, data 0x%x", address, data);
1684 ret = smsc911x_eeprom_send_cmd(pdata, op);
1685
1686 if (!ret) {
1687 op = E2P_CMD_EPC_CMD_WRITE_ | address;
1688 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
1689
1690 /* Workaround for hardware read-after-write restriction */
1691 temp = smsc911x_reg_read(pdata, BYTE_TEST);
1692
1693 ret = smsc911x_eeprom_send_cmd(pdata, op);
1694 }
1695
1696 return ret;
1697 }
1698
1699 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
1700 {
1701 return SMSC911X_EEPROM_SIZE;
1702 }
1703
1704 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
1705 struct ethtool_eeprom *eeprom, u8 *data)
1706 {
1707 struct smsc911x_data *pdata = netdev_priv(dev);
1708 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
1709 int len;
1710 int i;
1711
1712 smsc911x_eeprom_enable_access(pdata);
1713
1714 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
1715 for (i = 0; i < len; i++) {
1716 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
1717 if (ret < 0) {
1718 eeprom->len = 0;
1719 return ret;
1720 }
1721 }
1722
1723 memcpy(data, &eeprom_data[eeprom->offset], len);
1724 eeprom->len = len;
1725 return 0;
1726 }
1727
1728 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
1729 struct ethtool_eeprom *eeprom, u8 *data)
1730 {
1731 int ret;
1732 struct smsc911x_data *pdata = netdev_priv(dev);
1733
1734 smsc911x_eeprom_enable_access(pdata);
1735 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
1736 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
1737 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
1738
1739 /* Single byte write, according to man page */
1740 eeprom->len = 1;
1741
1742 return ret;
1743 }
1744
1745 static const struct ethtool_ops smsc911x_ethtool_ops = {
1746 .get_settings = smsc911x_ethtool_getsettings,
1747 .set_settings = smsc911x_ethtool_setsettings,
1748 .get_link = ethtool_op_get_link,
1749 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
1750 .nway_reset = smsc911x_ethtool_nwayreset,
1751 .get_msglevel = smsc911x_ethtool_getmsglevel,
1752 .set_msglevel = smsc911x_ethtool_setmsglevel,
1753 .get_regs_len = smsc911x_ethtool_getregslen,
1754 .get_regs = smsc911x_ethtool_getregs,
1755 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
1756 .get_eeprom = smsc911x_ethtool_get_eeprom,
1757 .set_eeprom = smsc911x_ethtool_set_eeprom,
1758 };
1759
1760 static const struct net_device_ops smsc911x_netdev_ops = {
1761 .ndo_open = smsc911x_open,
1762 .ndo_stop = smsc911x_stop,
1763 .ndo_start_xmit = smsc911x_hard_start_xmit,
1764 .ndo_get_stats = smsc911x_get_stats,
1765 .ndo_set_multicast_list = smsc911x_set_multicast_list,
1766 .ndo_do_ioctl = smsc911x_do_ioctl,
1767 .ndo_change_mtu = eth_change_mtu,
1768 .ndo_validate_addr = eth_validate_addr,
1769 .ndo_set_mac_address = smsc911x_set_mac_address,
1770 #ifdef CONFIG_NET_POLL_CONTROLLER
1771 .ndo_poll_controller = smsc911x_poll_controller,
1772 #endif
1773 };
1774
1775 /* copies the current mac address from hardware to dev->dev_addr */
1776 static void __devinit smsc911x_read_mac_address(struct net_device *dev)
1777 {
1778 struct smsc911x_data *pdata = netdev_priv(dev);
1779 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
1780 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
1781
1782 dev->dev_addr[0] = (u8)(mac_low32);
1783 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
1784 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
1785 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
1786 dev->dev_addr[4] = (u8)(mac_high16);
1787 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
1788 }
1789
1790 /* Initializing private device structures, only called from probe */
1791 static int __devinit smsc911x_init(struct net_device *dev)
1792 {
1793 struct smsc911x_data *pdata = netdev_priv(dev);
1794 unsigned int byte_test;
1795
1796 SMSC_TRACE(PROBE, "Driver Parameters:");
1797 SMSC_TRACE(PROBE, "LAN base: 0x%08lX",
1798 (unsigned long)pdata->ioaddr);
1799 SMSC_TRACE(PROBE, "IRQ: %d", dev->irq);
1800 SMSC_TRACE(PROBE, "PHY will be autodetected.");
1801
1802 spin_lock_init(&pdata->dev_lock);
1803
1804 if (pdata->ioaddr == 0) {
1805 SMSC_WARNING(PROBE, "pdata->ioaddr: 0x00000000");
1806 return -ENODEV;
1807 }
1808
1809 /* Check byte ordering */
1810 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1811 SMSC_TRACE(PROBE, "BYTE_TEST: 0x%08X", byte_test);
1812 if (byte_test == 0x43218765) {
1813 SMSC_TRACE(PROBE, "BYTE_TEST looks swapped, "
1814 "applying WORD_SWAP");
1815 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
1816
1817 /* 1 dummy read of BYTE_TEST is needed after a write to
1818 * WORD_SWAP before its contents are valid */
1819 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1820
1821 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1822 }
1823
1824 if (byte_test != 0x87654321) {
1825 SMSC_WARNING(DRV, "BYTE_TEST: 0x%08X", byte_test);
1826 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
1827 SMSC_WARNING(PROBE,
1828 "top 16 bits equal to bottom 16 bits");
1829 SMSC_TRACE(PROBE, "This may mean the chip is set "
1830 "for 32 bit while the bus is reading 16 bit");
1831 }
1832 return -ENODEV;
1833 }
1834
1835 /* Default generation to zero (all workarounds apply) */
1836 pdata->generation = 0;
1837
1838 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
1839 switch (pdata->idrev & 0xFFFF0000) {
1840 case 0x01180000:
1841 case 0x01170000:
1842 case 0x01160000:
1843 case 0x01150000:
1844 /* LAN911[5678] family */
1845 pdata->generation = pdata->idrev & 0x0000FFFF;
1846 break;
1847
1848 case 0x118A0000:
1849 case 0x117A0000:
1850 case 0x116A0000:
1851 case 0x115A0000:
1852 /* LAN921[5678] family */
1853 pdata->generation = 3;
1854 break;
1855
1856 case 0x92100000:
1857 case 0x92110000:
1858 case 0x92200000:
1859 case 0x92210000:
1860 /* LAN9210/LAN9211/LAN9220/LAN9221 */
1861 pdata->generation = 4;
1862 break;
1863
1864 default:
1865 SMSC_WARNING(PROBE, "LAN911x not identified, idrev: 0x%08X",
1866 pdata->idrev);
1867 return -ENODEV;
1868 }
1869
1870 SMSC_TRACE(PROBE, "LAN911x identified, idrev: 0x%08X, generation: %d",
1871 pdata->idrev, pdata->generation);
1872
1873 if (pdata->generation == 0)
1874 SMSC_WARNING(PROBE,
1875 "This driver is not intended for this chip revision");
1876
1877 /* workaround for platforms without an eeprom, where the mac address
1878 * is stored elsewhere and set by the bootloader. This saves the
1879 * mac address before resetting the device */
1880 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS)
1881 smsc911x_read_mac_address(dev);
1882
1883 /* Reset the LAN911x */
1884 if (smsc911x_soft_reset(pdata))
1885 return -ENODEV;
1886
1887 /* Disable all interrupt sources until we bring the device up */
1888 smsc911x_reg_write(pdata, INT_EN, 0);
1889
1890 ether_setup(dev);
1891 dev->flags |= IFF_MULTICAST;
1892 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
1893 dev->netdev_ops = &smsc911x_netdev_ops;
1894 dev->ethtool_ops = &smsc911x_ethtool_ops;
1895
1896 return 0;
1897 }
1898
1899 static int __devexit smsc911x_drv_remove(struct platform_device *pdev)
1900 {
1901 struct net_device *dev;
1902 struct smsc911x_data *pdata;
1903 struct resource *res;
1904
1905 dev = platform_get_drvdata(pdev);
1906 BUG_ON(!dev);
1907 pdata = netdev_priv(dev);
1908 BUG_ON(!pdata);
1909 BUG_ON(!pdata->ioaddr);
1910 BUG_ON(!pdata->phy_dev);
1911
1912 SMSC_TRACE(IFDOWN, "Stopping driver.");
1913
1914 phy_disconnect(pdata->phy_dev);
1915 pdata->phy_dev = NULL;
1916 mdiobus_unregister(pdata->mii_bus);
1917 mdiobus_free(pdata->mii_bus);
1918
1919 platform_set_drvdata(pdev, NULL);
1920 unregister_netdev(dev);
1921 free_irq(dev->irq, dev);
1922 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1923 "smsc911x-memory");
1924 if (!res)
1925 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1926
1927 release_mem_region(res->start, resource_size(res));
1928
1929 iounmap(pdata->ioaddr);
1930
1931 free_netdev(dev);
1932
1933 return 0;
1934 }
1935
1936 static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
1937 {
1938 struct net_device *dev;
1939 struct smsc911x_data *pdata;
1940 struct smsc911x_platform_config *config = pdev->dev.platform_data;
1941 struct resource *res, *irq_res;
1942 unsigned int intcfg = 0;
1943 int res_size, irq_flags;
1944 int retval;
1945
1946 pr_info("%s: Driver version %s.\n", SMSC_CHIPNAME, SMSC_DRV_VERSION);
1947
1948 /* platform data specifies irq & dynamic bus configuration */
1949 if (!pdev->dev.platform_data) {
1950 pr_warning("%s: platform_data not provided\n", SMSC_CHIPNAME);
1951 retval = -ENODEV;
1952 goto out_0;
1953 }
1954
1955 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1956 "smsc911x-memory");
1957 if (!res)
1958 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1959 if (!res) {
1960 pr_warning("%s: Could not allocate resource.\n",
1961 SMSC_CHIPNAME);
1962 retval = -ENODEV;
1963 goto out_0;
1964 }
1965 res_size = resource_size(res);
1966
1967 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1968 if (!irq_res) {
1969 pr_warning("%s: Could not allocate irq resource.\n",
1970 SMSC_CHIPNAME);
1971 retval = -ENODEV;
1972 goto out_0;
1973 }
1974
1975 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
1976 retval = -EBUSY;
1977 goto out_0;
1978 }
1979
1980 dev = alloc_etherdev(sizeof(struct smsc911x_data));
1981 if (!dev) {
1982 pr_warning("%s: Could not allocate device.\n", SMSC_CHIPNAME);
1983 retval = -ENOMEM;
1984 goto out_release_io_1;
1985 }
1986
1987 SET_NETDEV_DEV(dev, &pdev->dev);
1988
1989 pdata = netdev_priv(dev);
1990
1991 dev->irq = irq_res->start;
1992 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
1993 pdata->ioaddr = ioremap_nocache(res->start, res_size);
1994
1995 /* copy config parameters across to pdata */
1996 memcpy(&pdata->config, config, sizeof(pdata->config));
1997
1998 pdata->dev = dev;
1999 pdata->msg_enable = ((1 << debug) - 1);
2000
2001 if (pdata->ioaddr == NULL) {
2002 SMSC_WARNING(PROBE,
2003 "Error smsc911x base address invalid");
2004 retval = -ENOMEM;
2005 goto out_free_netdev_2;
2006 }
2007
2008 retval = smsc911x_init(dev);
2009 if (retval < 0)
2010 goto out_unmap_io_3;
2011
2012 /* configure irq polarity and type before connecting isr */
2013 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
2014 intcfg |= INT_CFG_IRQ_POL_;
2015
2016 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
2017 intcfg |= INT_CFG_IRQ_TYPE_;
2018
2019 smsc911x_reg_write(pdata, INT_CFG, intcfg);
2020
2021 /* Ensure interrupts are globally disabled before connecting ISR */
2022 smsc911x_reg_write(pdata, INT_EN, 0);
2023 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
2024
2025 retval = request_irq(dev->irq, smsc911x_irqhandler,
2026 irq_flags | IRQF_SHARED, dev->name, dev);
2027 if (retval) {
2028 SMSC_WARNING(PROBE,
2029 "Unable to claim requested irq: %d", dev->irq);
2030 goto out_unmap_io_3;
2031 }
2032
2033 platform_set_drvdata(pdev, dev);
2034
2035 retval = register_netdev(dev);
2036 if (retval) {
2037 SMSC_WARNING(PROBE,
2038 "Error %i registering device", retval);
2039 goto out_unset_drvdata_4;
2040 } else {
2041 SMSC_TRACE(PROBE, "Network interface: \"%s\"", dev->name);
2042 }
2043
2044 spin_lock_init(&pdata->mac_lock);
2045
2046 retval = smsc911x_mii_init(pdev, dev);
2047 if (retval) {
2048 SMSC_WARNING(PROBE,
2049 "Error %i initialising mii", retval);
2050 goto out_unregister_netdev_5;
2051 }
2052
2053 spin_lock_irq(&pdata->mac_lock);
2054
2055 /* Check if mac address has been specified when bringing interface up */
2056 if (is_valid_ether_addr(dev->dev_addr)) {
2057 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2058 SMSC_TRACE(PROBE, "MAC Address is specified by configuration");
2059 } else if (is_valid_ether_addr(pdata->config.mac)) {
2060 memcpy(dev->dev_addr, pdata->config.mac, 6);
2061 SMSC_TRACE(PROBE, "MAC Address specified by platform data");
2062 } else {
2063 /* Try reading mac address from device. if EEPROM is present
2064 * it will already have been set */
2065 smsc911x_read_mac_address(dev);
2066
2067 if (is_valid_ether_addr(dev->dev_addr)) {
2068 /* eeprom values are valid so use them */
2069 SMSC_TRACE(PROBE,
2070 "Mac Address is read from LAN911x EEPROM");
2071 } else {
2072 /* eeprom values are invalid, generate random MAC */
2073 random_ether_addr(dev->dev_addr);
2074 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2075 SMSC_TRACE(PROBE,
2076 "MAC Address is set to random_ether_addr");
2077 }
2078 }
2079
2080 spin_unlock_irq(&pdata->mac_lock);
2081
2082 dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr);
2083
2084 return 0;
2085
2086 out_unregister_netdev_5:
2087 unregister_netdev(dev);
2088 out_unset_drvdata_4:
2089 platform_set_drvdata(pdev, NULL);
2090 free_irq(dev->irq, dev);
2091 out_unmap_io_3:
2092 iounmap(pdata->ioaddr);
2093 out_free_netdev_2:
2094 free_netdev(dev);
2095 out_release_io_1:
2096 release_mem_region(res->start, resource_size(res));
2097 out_0:
2098 return retval;
2099 }
2100
2101 #ifdef CONFIG_PM
2102 /* This implementation assumes the devices remains powered on its VDDVARIO
2103 * pins during suspend. */
2104
2105 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2106
2107 static int smsc911x_suspend(struct device *dev)
2108 {
2109 struct net_device *ndev = dev_get_drvdata(dev);
2110 struct smsc911x_data *pdata = netdev_priv(ndev);
2111
2112 /* enable wake on LAN, energy detection and the external PME
2113 * signal. */
2114 smsc911x_reg_write(pdata, PMT_CTRL,
2115 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2116 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2117
2118 return 0;
2119 }
2120
2121 static int smsc911x_resume(struct device *dev)
2122 {
2123 struct net_device *ndev = dev_get_drvdata(dev);
2124 struct smsc911x_data *pdata = netdev_priv(ndev);
2125 unsigned int to = 100;
2126
2127 /* Note 3.11 from the datasheet:
2128 * "When the LAN9220 is in a power saving state, a write of any
2129 * data to the BYTE_TEST register will wake-up the device."
2130 */
2131 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2132
2133 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2134 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2135 * if it failed. */
2136 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2137 udelay(1000);
2138
2139 return (to == 0) ? -EIO : 0;
2140 }
2141
2142 static const struct dev_pm_ops smsc911x_pm_ops = {
2143 .suspend = smsc911x_suspend,
2144 .resume = smsc911x_resume,
2145 };
2146
2147 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2148
2149 #else
2150 #define SMSC911X_PM_OPS NULL
2151 #endif
2152
2153 static struct platform_driver smsc911x_driver = {
2154 .probe = smsc911x_drv_probe,
2155 .remove = __devexit_p(smsc911x_drv_remove),
2156 .driver = {
2157 .name = SMSC_CHIPNAME,
2158 .owner = THIS_MODULE,
2159 .pm = SMSC911X_PM_OPS,
2160 },
2161 };
2162
2163 /* Entry point for loading the module */
2164 static int __init smsc911x_init_module(void)
2165 {
2166 return platform_driver_register(&smsc911x_driver);
2167 }
2168
2169 /* entry point for unloading the module */
2170 static void __exit smsc911x_cleanup_module(void)
2171 {
2172 platform_driver_unregister(&smsc911x_driver);
2173 }
2174
2175 module_init(smsc911x_init_module);
2176 module_exit(smsc911x_cleanup_module);
AMDTP streaming driver for the Linux FireWire stack (Juju)