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igb: add pf side of VMDq support
[linux-2.6/btrfs-unstable.git] / drivers / net / smsc911x.c
blob6e175e5555a11a89812af87989657c1264e006f8
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/version.h>
47 #include <linux/bug.h>
48 #include <linux/bitops.h>
49 #include <linux/irq.h>
50 #include <linux/io.h>
51 #include <linux/phy.h>
52 #include <linux/smsc911x.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_USE_32BIT) {
180 writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
181 return;
182 }
183
184 if (pdata->config.flags & SMSC911X_USE_16BIT) {
185 while (wordcount--)
186 smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
187 return;
188 }
189
190 BUG();
191 }
192
193 /* Reads a packet out of the RX_DATA_FIFO */
194 static inline void
195 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
196 unsigned int wordcount)
197 {
198 if (pdata->config.flags & SMSC911X_USE_32BIT) {
199 readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
200 return;
201 }
202
203 if (pdata->config.flags & SMSC911X_USE_16BIT) {
204 while (wordcount--)
205 *buf++ = smsc911x_reg_read(pdata, RX_DATA_FIFO);
206 return;
207 }
208
209 BUG();
210 }
211
212 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
213 * and smsc911x_mac_write, so assumes mac_lock is held */
214 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
215 {
216 int i;
217 u32 val;
218
219 SMSC_ASSERT_MAC_LOCK(pdata);
220
221 for (i = 0; i < 40; i++) {
222 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
223 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
224 return 0;
225 }
226 SMSC_WARNING(HW, "Timed out waiting for MAC not BUSY. "
227 "MAC_CSR_CMD: 0x%08X", val);
228 return -EIO;
229 }
230
231 /* Fetches a MAC register value. Assumes mac_lock is acquired */
232 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
233 {
234 unsigned int temp;
235
236 SMSC_ASSERT_MAC_LOCK(pdata);
237
238 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
239 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
240 SMSC_WARNING(HW, "MAC busy at entry");
241 return 0xFFFFFFFF;
242 }
243
244 /* Send the MAC cmd */
245 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
246 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
247
248 /* Workaround for hardware read-after-write restriction */
249 temp = smsc911x_reg_read(pdata, BYTE_TEST);
250
251 /* Wait for the read to complete */
252 if (likely(smsc911x_mac_complete(pdata) == 0))
253 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
254
255 SMSC_WARNING(HW, "MAC busy after read");
256 return 0xFFFFFFFF;
257 }
258
259 /* Set a mac register, mac_lock must be acquired before calling */
260 static void smsc911x_mac_write(struct smsc911x_data *pdata,
261 unsigned int offset, u32 val)
262 {
263 unsigned int temp;
264
265 SMSC_ASSERT_MAC_LOCK(pdata);
266
267 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
268 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
269 SMSC_WARNING(HW,
270 "smsc911x_mac_write failed, MAC busy at entry");
271 return;
272 }
273
274 /* Send data to write */
275 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
276
277 /* Write the actual data */
278 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
279 MAC_CSR_CMD_CSR_BUSY_));
280
281 /* Workaround for hardware read-after-write restriction */
282 temp = smsc911x_reg_read(pdata, BYTE_TEST);
283
284 /* Wait for the write to complete */
285 if (likely(smsc911x_mac_complete(pdata) == 0))
286 return;
287
288 SMSC_WARNING(HW,
289 "smsc911x_mac_write failed, MAC busy after write");
290 }
291
292 /* Get a phy register */
293 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
294 {
295 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
296 unsigned long flags;
297 unsigned int addr;
298 int i, reg;
299
300 spin_lock_irqsave(&pdata->mac_lock, flags);
301
302 /* Confirm MII not busy */
303 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
304 SMSC_WARNING(HW,
305 "MII is busy in smsc911x_mii_read???");
306 reg = -EIO;
307 goto out;
308 }
309
310 /* Set the address, index & direction (read from PHY) */
311 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
312 smsc911x_mac_write(pdata, MII_ACC, addr);
313
314 /* Wait for read to complete w/ timeout */
315 for (i = 0; i < 100; i++)
316 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
317 reg = smsc911x_mac_read(pdata, MII_DATA);
318 goto out;
319 }
320
321 SMSC_WARNING(HW, "Timed out waiting for MII write to finish");
322 reg = -EIO;
323
324 out:
325 spin_unlock_irqrestore(&pdata->mac_lock, flags);
326 return reg;
327 }
328
329 /* Set a phy register */
330 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
331 u16 val)
332 {
333 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
334 unsigned long flags;
335 unsigned int addr;
336 int i, reg;
337
338 spin_lock_irqsave(&pdata->mac_lock, flags);
339
340 /* Confirm MII not busy */
341 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
342 SMSC_WARNING(HW,
343 "MII is busy in smsc911x_mii_write???");
344 reg = -EIO;
345 goto out;
346 }
347
348 /* Put the data to write in the MAC */
349 smsc911x_mac_write(pdata, MII_DATA, val);
350
351 /* Set the address, index & direction (write to PHY) */
352 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
353 MII_ACC_MII_WRITE_;
354 smsc911x_mac_write(pdata, MII_ACC, addr);
355
356 /* Wait for write to complete w/ timeout */
357 for (i = 0; i < 100; i++)
358 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
359 reg = 0;
360 goto out;
361 }
362
363 SMSC_WARNING(HW, "Timed out waiting for MII write to finish");
364 reg = -EIO;
365
366 out:
367 spin_unlock_irqrestore(&pdata->mac_lock, flags);
368 return reg;
369 }
370
371 /* Switch to external phy. Assumes tx and rx are stopped. */
372 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
373 {
374 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
375
376 /* Disable phy clocks to the MAC */
377 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
378 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
379 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
380 udelay(10); /* Enough time for clocks to stop */
381
382 /* Switch to external phy */
383 hwcfg |= HW_CFG_EXT_PHY_EN_;
384 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
385
386 /* Enable phy clocks to the MAC */
387 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
388 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
389 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
390 udelay(10); /* Enough time for clocks to restart */
391
392 hwcfg |= HW_CFG_SMI_SEL_;
393 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
394 }
395
396 /* Autodetects and enables external phy if present on supported chips.
397 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
398 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
399 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
400 {
401 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
402
403 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
404 SMSC_TRACE(HW, "Forcing internal PHY");
405 pdata->using_extphy = 0;
406 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
407 SMSC_TRACE(HW, "Forcing external PHY");
408 smsc911x_phy_enable_external(pdata);
409 pdata->using_extphy = 1;
410 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
411 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET set, using external PHY");
412 smsc911x_phy_enable_external(pdata);
413 pdata->using_extphy = 1;
414 } else {
415 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET clear, using internal PHY");
416 pdata->using_extphy = 0;
417 }
418 }
419
420 /* Fetches a tx status out of the status fifo */
421 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
422 {
423 unsigned int result =
424 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
425
426 if (result != 0)
427 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
428
429 return result;
430 }
431
432 /* Fetches the next rx status */
433 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
434 {
435 unsigned int result =
436 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
437
438 if (result != 0)
439 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
440
441 return result;
442 }
443
444 #ifdef USE_PHY_WORK_AROUND
445 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
446 {
447 unsigned int tries;
448 u32 wrsz;
449 u32 rdsz;
450 ulong bufp;
451
452 for (tries = 0; tries < 10; tries++) {
453 unsigned int txcmd_a;
454 unsigned int txcmd_b;
455 unsigned int status;
456 unsigned int pktlength;
457 unsigned int i;
458
459 /* Zero-out rx packet memory */
460 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
461
462 /* Write tx packet to 118 */
463 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
464 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
465 txcmd_a |= MIN_PACKET_SIZE;
466
467 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
468
469 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
470 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
471
472 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
473 wrsz = MIN_PACKET_SIZE + 3;
474 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
475 wrsz >>= 2;
476
477 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
478
479 /* Wait till transmit is done */
480 i = 60;
481 do {
482 udelay(5);
483 status = smsc911x_tx_get_txstatus(pdata);
484 } while ((i--) && (!status));
485
486 if (!status) {
487 SMSC_WARNING(HW, "Failed to transmit "
488 "during loopback test");
489 continue;
490 }
491 if (status & TX_STS_ES_) {
492 SMSC_WARNING(HW, "Transmit encountered "
493 "errors during loopback test");
494 continue;
495 }
496
497 /* Wait till receive is done */
498 i = 60;
499 do {
500 udelay(5);
501 status = smsc911x_rx_get_rxstatus(pdata);
502 } while ((i--) && (!status));
503
504 if (!status) {
505 SMSC_WARNING(HW,
506 "Failed to receive during loopback test");
507 continue;
508 }
509 if (status & RX_STS_ES_) {
510 SMSC_WARNING(HW, "Receive encountered "
511 "errors during loopback test");
512 continue;
513 }
514
515 pktlength = ((status & 0x3FFF0000UL) >> 16);
516 bufp = (ulong)pdata->loopback_rx_pkt;
517 rdsz = pktlength + 3;
518 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
519 rdsz >>= 2;
520
521 smsc911x_rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
522
523 if (pktlength != (MIN_PACKET_SIZE + 4)) {
524 SMSC_WARNING(HW, "Unexpected packet size "
525 "during loop back test, size=%d, will retry",
526 pktlength);
527 } else {
528 unsigned int j;
529 int mismatch = 0;
530 for (j = 0; j < MIN_PACKET_SIZE; j++) {
531 if (pdata->loopback_tx_pkt[j]
532 != pdata->loopback_rx_pkt[j]) {
533 mismatch = 1;
534 break;
535 }
536 }
537 if (!mismatch) {
538 SMSC_TRACE(HW, "Successfully verified "
539 "loopback packet");
540 return 0;
541 } else {
542 SMSC_WARNING(HW, "Data mismatch "
543 "during loop back test, will retry");
544 }
545 }
546 }
547
548 return -EIO;
549 }
550
551 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
552 {
553 struct phy_device *phy_dev = pdata->phy_dev;
554 unsigned int temp;
555 unsigned int i = 100000;
556
557 BUG_ON(!phy_dev);
558 BUG_ON(!phy_dev->bus);
559
560 SMSC_TRACE(HW, "Performing PHY BCR Reset");
561 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
562 do {
563 msleep(1);
564 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
565 MII_BMCR);
566 } while ((i--) && (temp & BMCR_RESET));
567
568 if (temp & BMCR_RESET) {
569 SMSC_WARNING(HW, "PHY reset failed to complete.");
570 return -EIO;
571 }
572 /* Extra delay required because the phy may not be completed with
573 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
574 * enough delay but using 1ms here to be safe */
575 msleep(1);
576
577 return 0;
578 }
579
580 static int smsc911x_phy_loopbacktest(struct net_device *dev)
581 {
582 struct smsc911x_data *pdata = netdev_priv(dev);
583 struct phy_device *phy_dev = pdata->phy_dev;
584 int result = -EIO;
585 unsigned int i, val;
586 unsigned long flags;
587
588 /* Initialise tx packet using broadcast destination address */
589 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN);
590
591 /* Use incrementing source address */
592 for (i = 6; i < 12; i++)
593 pdata->loopback_tx_pkt[i] = (char)i;
594
595 /* Set length type field */
596 pdata->loopback_tx_pkt[12] = 0x00;
597 pdata->loopback_tx_pkt[13] = 0x00;
598
599 for (i = 14; i < MIN_PACKET_SIZE; i++)
600 pdata->loopback_tx_pkt[i] = (char)i;
601
602 val = smsc911x_reg_read(pdata, HW_CFG);
603 val &= HW_CFG_TX_FIF_SZ_;
604 val |= HW_CFG_SF_;
605 smsc911x_reg_write(pdata, HW_CFG, val);
606
607 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
608 smsc911x_reg_write(pdata, RX_CFG,
609 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
610
611 for (i = 0; i < 10; i++) {
612 /* Set PHY to 10/FD, no ANEG, and loopback mode */
613 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR,
614 BMCR_LOOPBACK | BMCR_FULLDPLX);
615
616 /* Enable MAC tx/rx, FD */
617 spin_lock_irqsave(&pdata->mac_lock, flags);
618 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
619 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
620 spin_unlock_irqrestore(&pdata->mac_lock, flags);
621
622 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
623 result = 0;
624 break;
625 }
626 pdata->resetcount++;
627
628 /* Disable MAC rx */
629 spin_lock_irqsave(&pdata->mac_lock, flags);
630 smsc911x_mac_write(pdata, MAC_CR, 0);
631 spin_unlock_irqrestore(&pdata->mac_lock, flags);
632
633 smsc911x_phy_reset(pdata);
634 }
635
636 /* Disable MAC */
637 spin_lock_irqsave(&pdata->mac_lock, flags);
638 smsc911x_mac_write(pdata, MAC_CR, 0);
639 spin_unlock_irqrestore(&pdata->mac_lock, flags);
640
641 /* Cancel PHY loopback mode */
642 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
643
644 smsc911x_reg_write(pdata, TX_CFG, 0);
645 smsc911x_reg_write(pdata, RX_CFG, 0);
646
647 return result;
648 }
649 #endif /* USE_PHY_WORK_AROUND */
650
651 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
652 {
653 struct phy_device *phy_dev = pdata->phy_dev;
654 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
655 u32 flow;
656 unsigned long flags;
657
658 if (phy_dev->duplex == DUPLEX_FULL) {
659 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
660 u16 rmtadv = phy_read(phy_dev, MII_LPA);
661 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
662
663 if (cap & FLOW_CTRL_RX)
664 flow = 0xFFFF0002;
665 else
666 flow = 0;
667
668 if (cap & FLOW_CTRL_TX)
669 afc |= 0xF;
670 else
671 afc &= ~0xF;
672
673 SMSC_TRACE(HW, "rx pause %s, tx pause %s",
674 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
675 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
676 } else {
677 SMSC_TRACE(HW, "half duplex");
678 flow = 0;
679 afc |= 0xF;
680 }
681
682 spin_lock_irqsave(&pdata->mac_lock, flags);
683 smsc911x_mac_write(pdata, FLOW, flow);
684 spin_unlock_irqrestore(&pdata->mac_lock, flags);
685
686 smsc911x_reg_write(pdata, AFC_CFG, afc);
687 }
688
689 /* Update link mode if anything has changed. Called periodically when the
690 * PHY is in polling mode, even if nothing has changed. */
691 static void smsc911x_phy_adjust_link(struct net_device *dev)
692 {
693 struct smsc911x_data *pdata = netdev_priv(dev);
694 struct phy_device *phy_dev = pdata->phy_dev;
695 unsigned long flags;
696 int carrier;
697
698 if (phy_dev->duplex != pdata->last_duplex) {
699 unsigned int mac_cr;
700 SMSC_TRACE(HW, "duplex state has changed");
701
702 spin_lock_irqsave(&pdata->mac_lock, flags);
703 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
704 if (phy_dev->duplex) {
705 SMSC_TRACE(HW,
706 "configuring for full duplex mode");
707 mac_cr |= MAC_CR_FDPX_;
708 } else {
709 SMSC_TRACE(HW,
710 "configuring for half duplex mode");
711 mac_cr &= ~MAC_CR_FDPX_;
712 }
713 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
714 spin_unlock_irqrestore(&pdata->mac_lock, flags);
715
716 smsc911x_phy_update_flowcontrol(pdata);
717 pdata->last_duplex = phy_dev->duplex;
718 }
719
720 carrier = netif_carrier_ok(dev);
721 if (carrier != pdata->last_carrier) {
722 SMSC_TRACE(HW, "carrier state has changed");
723 if (carrier) {
724 SMSC_TRACE(HW, "configuring for carrier OK");
725 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
726 (!pdata->using_extphy)) {
727 /* Restore orginal GPIO configuration */
728 pdata->gpio_setting = pdata->gpio_orig_setting;
729 smsc911x_reg_write(pdata, GPIO_CFG,
730 pdata->gpio_setting);
731 }
732 } else {
733 SMSC_TRACE(HW, "configuring for no carrier");
734 /* Check global setting that LED1
735 * usage is 10/100 indicator */
736 pdata->gpio_setting = smsc911x_reg_read(pdata,
737 GPIO_CFG);
738 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_)
739 && (!pdata->using_extphy)) {
740 /* Force 10/100 LED off, after saving
741 * orginal GPIO configuration */
742 pdata->gpio_orig_setting = pdata->gpio_setting;
743
744 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
745 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
746 | GPIO_CFG_GPIODIR0_
747 | GPIO_CFG_GPIOD0_);
748 smsc911x_reg_write(pdata, GPIO_CFG,
749 pdata->gpio_setting);
750 }
751 }
752 pdata->last_carrier = carrier;
753 }
754 }
755
756 static int smsc911x_mii_probe(struct net_device *dev)
757 {
758 struct smsc911x_data *pdata = netdev_priv(dev);
759 struct phy_device *phydev = NULL;
760 int phy_addr;
761
762 /* find the first phy */
763 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
764 if (pdata->mii_bus->phy_map[phy_addr]) {
765 phydev = pdata->mii_bus->phy_map[phy_addr];
766 SMSC_TRACE(PROBE, "PHY %d: addr %d, phy_id 0x%08X",
767 phy_addr, phydev->addr, phydev->phy_id);
768 break;
769 }
770 }
771
772 if (!phydev) {
773 pr_err("%s: no PHY found\n", dev->name);
774 return -ENODEV;
775 }
776
777 phydev = phy_connect(dev, dev_name(&phydev->dev),
778 &smsc911x_phy_adjust_link, 0, pdata->config.phy_interface);
779
780 if (IS_ERR(phydev)) {
781 pr_err("%s: Could not attach to PHY\n", dev->name);
782 return PTR_ERR(phydev);
783 }
784
785 pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
786 dev->name, phydev->drv->name,
787 dev_name(&phydev->dev), phydev->irq);
788
789 /* mask with MAC supported features */
790 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
791 SUPPORTED_Asym_Pause);
792 phydev->advertising = phydev->supported;
793
794 pdata->phy_dev = phydev;
795 pdata->last_duplex = -1;
796 pdata->last_carrier = -1;
797
798 #ifdef USE_PHY_WORK_AROUND
799 if (smsc911x_phy_loopbacktest(dev) < 0) {
800 SMSC_WARNING(HW, "Failed Loop Back Test");
801 return -ENODEV;
802 }
803 SMSC_TRACE(HW, "Passed Loop Back Test");
804 #endif /* USE_PHY_WORK_AROUND */
805
806 SMSC_TRACE(HW, "phy initialised succesfully");
807 return 0;
808 }
809
810 static int __devinit smsc911x_mii_init(struct platform_device *pdev,
811 struct net_device *dev)
812 {
813 struct smsc911x_data *pdata = netdev_priv(dev);
814 int err = -ENXIO, i;
815
816 pdata->mii_bus = mdiobus_alloc();
817 if (!pdata->mii_bus) {
818 err = -ENOMEM;
819 goto err_out_1;
820 }
821
822 pdata->mii_bus->name = SMSC_MDIONAME;
823 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id);
824 pdata->mii_bus->priv = pdata;
825 pdata->mii_bus->read = smsc911x_mii_read;
826 pdata->mii_bus->write = smsc911x_mii_write;
827 pdata->mii_bus->irq = pdata->phy_irq;
828 for (i = 0; i < PHY_MAX_ADDR; ++i)
829 pdata->mii_bus->irq[i] = PHY_POLL;
830
831 pdata->mii_bus->parent = &pdev->dev;
832
833 switch (pdata->idrev & 0xFFFF0000) {
834 case 0x01170000:
835 case 0x01150000:
836 case 0x117A0000:
837 case 0x115A0000:
838 /* External PHY supported, try to autodetect */
839 smsc911x_phy_initialise_external(pdata);
840 break;
841 default:
842 SMSC_TRACE(HW, "External PHY is not supported, "
843 "using internal PHY");
844 pdata->using_extphy = 0;
845 break;
846 }
847
848 if (!pdata->using_extphy) {
849 /* Mask all PHYs except ID 1 (internal) */
850 pdata->mii_bus->phy_mask = ~(1 << 1);
851 }
852
853 if (mdiobus_register(pdata->mii_bus)) {
854 SMSC_WARNING(PROBE, "Error registering mii bus");
855 goto err_out_free_bus_2;
856 }
857
858 if (smsc911x_mii_probe(dev) < 0) {
859 SMSC_WARNING(PROBE, "Error registering mii bus");
860 goto err_out_unregister_bus_3;
861 }
862
863 return 0;
864
865 err_out_unregister_bus_3:
866 mdiobus_unregister(pdata->mii_bus);
867 err_out_free_bus_2:
868 mdiobus_free(pdata->mii_bus);
869 err_out_1:
870 return err;
871 }
872
873 /* Gets the number of tx statuses in the fifo */
874 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
875 {
876 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
877 & TX_FIFO_INF_TSUSED_) >> 16;
878 }
879
880 /* Reads tx statuses and increments counters where necessary */
881 static void smsc911x_tx_update_txcounters(struct net_device *dev)
882 {
883 struct smsc911x_data *pdata = netdev_priv(dev);
884 unsigned int tx_stat;
885
886 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
887 if (unlikely(tx_stat & 0x80000000)) {
888 /* In this driver the packet tag is used as the packet
889 * length. Since a packet length can never reach the
890 * size of 0x8000, this bit is reserved. It is worth
891 * noting that the "reserved bit" in the warning above
892 * does not reference a hardware defined reserved bit
893 * but rather a driver defined one.
894 */
895 SMSC_WARNING(HW,
896 "Packet tag reserved bit is high");
897 } else {
898 if (unlikely(tx_stat & 0x00008000)) {
899 dev->stats.tx_errors++;
900 } else {
901 dev->stats.tx_packets++;
902 dev->stats.tx_bytes += (tx_stat >> 16);
903 }
904 if (unlikely(tx_stat & 0x00000100)) {
905 dev->stats.collisions += 16;
906 dev->stats.tx_aborted_errors += 1;
907 } else {
908 dev->stats.collisions +=
909 ((tx_stat >> 3) & 0xF);
910 }
911 if (unlikely(tx_stat & 0x00000800))
912 dev->stats.tx_carrier_errors += 1;
913 if (unlikely(tx_stat & 0x00000200)) {
914 dev->stats.collisions++;
915 dev->stats.tx_aborted_errors++;
916 }
917 }
918 }
919 }
920
921 /* Increments the Rx error counters */
922 static void
923 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
924 {
925 int crc_err = 0;
926
927 if (unlikely(rxstat & 0x00008000)) {
928 dev->stats.rx_errors++;
929 if (unlikely(rxstat & 0x00000002)) {
930 dev->stats.rx_crc_errors++;
931 crc_err = 1;
932 }
933 }
934 if (likely(!crc_err)) {
935 if (unlikely((rxstat & 0x00001020) == 0x00001020)) {
936 /* Frame type indicates length,
937 * and length error is set */
938 dev->stats.rx_length_errors++;
939 }
940 if (rxstat & RX_STS_MCAST_)
941 dev->stats.multicast++;
942 }
943 }
944
945 /* Quickly dumps bad packets */
946 static void
947 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes)
948 {
949 unsigned int pktwords = (pktbytes + NET_IP_ALIGN + 3) >> 2;
950
951 if (likely(pktwords >= 4)) {
952 unsigned int timeout = 500;
953 unsigned int val;
954 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
955 do {
956 udelay(1);
957 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
958 } while (--timeout && (val & RX_DP_CTRL_RX_FFWD_));
959
960 if (unlikely(timeout == 0))
961 SMSC_WARNING(HW, "Timed out waiting for "
962 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
963 } else {
964 unsigned int temp;
965 while (pktwords--)
966 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
967 }
968 }
969
970 /* NAPI poll function */
971 static int smsc911x_poll(struct napi_struct *napi, int budget)
972 {
973 struct smsc911x_data *pdata =
974 container_of(napi, struct smsc911x_data, napi);
975 struct net_device *dev = pdata->dev;
976 int npackets = 0;
977
978 while (likely(netif_running(dev)) && (npackets < budget)) {
979 unsigned int pktlength;
980 unsigned int pktwords;
981 struct sk_buff *skb;
982 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
983
984 if (!rxstat) {
985 unsigned int temp;
986 /* We processed all packets available. Tell NAPI it can
987 * stop polling then re-enable rx interrupts */
988 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
989 napi_complete(napi);
990 temp = smsc911x_reg_read(pdata, INT_EN);
991 temp |= INT_EN_RSFL_EN_;
992 smsc911x_reg_write(pdata, INT_EN, temp);
993 break;
994 }
995
996 /* Count packet for NAPI scheduling, even if it has an error.
997 * Error packets still require cycles to discard */
998 npackets++;
999
1000 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1001 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1002 smsc911x_rx_counterrors(dev, rxstat);
1003
1004 if (unlikely(rxstat & RX_STS_ES_)) {
1005 SMSC_WARNING(RX_ERR,
1006 "Discarding packet with error bit set");
1007 /* Packet has an error, discard it and continue with
1008 * the next */
1009 smsc911x_rx_fastforward(pdata, pktwords);
1010 dev->stats.rx_dropped++;
1011 continue;
1012 }
1013
1014 skb = netdev_alloc_skb(dev, pktlength + NET_IP_ALIGN);
1015 if (unlikely(!skb)) {
1016 SMSC_WARNING(RX_ERR,
1017 "Unable to allocate skb for rx packet");
1018 /* Drop the packet and stop this polling iteration */
1019 smsc911x_rx_fastforward(pdata, pktwords);
1020 dev->stats.rx_dropped++;
1021 break;
1022 }
1023
1024 skb->data = skb->head;
1025 skb_reset_tail_pointer(skb);
1026
1027 /* Align IP on 16B boundary */
1028 skb_reserve(skb, NET_IP_ALIGN);
1029 skb_put(skb, pktlength - 4);
1030 smsc911x_rx_readfifo(pdata, (unsigned int *)skb->head,
1031 pktwords);
1032 skb->protocol = eth_type_trans(skb, dev);
1033 skb->ip_summed = CHECKSUM_NONE;
1034 netif_receive_skb(skb);
1035
1036 /* Update counters */
1037 dev->stats.rx_packets++;
1038 dev->stats.rx_bytes += (pktlength - 4);
1039 dev->last_rx = jiffies;
1040 }
1041
1042 /* Return total received packets */
1043 return npackets;
1044 }
1045
1046 /* Returns hash bit number for given MAC address
1047 * Example:
1048 * 01 00 5E 00 00 01 -> returns bit number 31 */
1049 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1050 {
1051 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1052 }
1053
1054 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1055 {
1056 /* Performs the multicast & mac_cr update. This is called when
1057 * safe on the current hardware, and with the mac_lock held */
1058 unsigned int mac_cr;
1059
1060 SMSC_ASSERT_MAC_LOCK(pdata);
1061
1062 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1063 mac_cr |= pdata->set_bits_mask;
1064 mac_cr &= ~(pdata->clear_bits_mask);
1065 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1066 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1067 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1068 SMSC_TRACE(HW, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1069 mac_cr, pdata->hashhi, pdata->hashlo);
1070 }
1071
1072 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1073 {
1074 unsigned int mac_cr;
1075
1076 /* This function is only called for older LAN911x devices
1077 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1078 * be modified during Rx - newer devices immediately update the
1079 * registers.
1080 *
1081 * This is called from interrupt context */
1082
1083 spin_lock(&pdata->mac_lock);
1084
1085 /* Check Rx has stopped */
1086 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1087 SMSC_WARNING(DRV, "Rx not stopped");
1088
1089 /* Perform the update - safe to do now Rx has stopped */
1090 smsc911x_rx_multicast_update(pdata);
1091
1092 /* Re-enable Rx */
1093 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1094 mac_cr |= MAC_CR_RXEN_;
1095 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1096
1097 pdata->multicast_update_pending = 0;
1098
1099 spin_unlock(&pdata->mac_lock);
1100 }
1101
1102 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1103 {
1104 unsigned int timeout;
1105 unsigned int temp;
1106
1107 /* Reset the LAN911x */
1108 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1109 timeout = 10;
1110 do {
1111 udelay(10);
1112 temp = smsc911x_reg_read(pdata, HW_CFG);
1113 } while ((--timeout) && (temp & HW_CFG_SRST_));
1114
1115 if (unlikely(temp & HW_CFG_SRST_)) {
1116 SMSC_WARNING(DRV, "Failed to complete reset");
1117 return -EIO;
1118 }
1119 return 0;
1120 }
1121
1122 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1123 static void
1124 smsc911x_set_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1125 {
1126 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1127 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1128 (dev_addr[1] << 8) | dev_addr[0];
1129
1130 SMSC_ASSERT_MAC_LOCK(pdata);
1131
1132 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1133 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1134 }
1135
1136 static int smsc911x_open(struct net_device *dev)
1137 {
1138 struct smsc911x_data *pdata = netdev_priv(dev);
1139 unsigned int timeout;
1140 unsigned int temp;
1141 unsigned int intcfg;
1142
1143 /* if the phy is not yet registered, retry later*/
1144 if (!pdata->phy_dev) {
1145 SMSC_WARNING(HW, "phy_dev is NULL");
1146 return -EAGAIN;
1147 }
1148
1149 if (!is_valid_ether_addr(dev->dev_addr)) {
1150 SMSC_WARNING(HW, "dev_addr is not a valid MAC address");
1151 return -EADDRNOTAVAIL;
1152 }
1153
1154 /* Reset the LAN911x */
1155 if (smsc911x_soft_reset(pdata)) {
1156 SMSC_WARNING(HW, "soft reset failed");
1157 return -EIO;
1158 }
1159
1160 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1161 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1162
1163 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1164 timeout = 50;
1165 while ((timeout--) &&
1166 (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_)) {
1167 udelay(10);
1168 }
1169
1170 if (unlikely(timeout == 0))
1171 SMSC_WARNING(IFUP,
1172 "Timed out waiting for EEPROM busy bit to clear");
1173
1174 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1175
1176 /* The soft reset above cleared the device's MAC address,
1177 * restore it from local copy (set in probe) */
1178 spin_lock_irq(&pdata->mac_lock);
1179 smsc911x_set_mac_address(pdata, dev->dev_addr);
1180 spin_unlock_irq(&pdata->mac_lock);
1181
1182 /* Initialise irqs, but leave all sources disabled */
1183 smsc911x_reg_write(pdata, INT_EN, 0);
1184 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1185
1186 /* Set interrupt deassertion to 100uS */
1187 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1188
1189 if (pdata->config.irq_polarity) {
1190 SMSC_TRACE(IFUP, "irq polarity: active high");
1191 intcfg |= INT_CFG_IRQ_POL_;
1192 } else {
1193 SMSC_TRACE(IFUP, "irq polarity: active low");
1194 }
1195
1196 if (pdata->config.irq_type) {
1197 SMSC_TRACE(IFUP, "irq type: push-pull");
1198 intcfg |= INT_CFG_IRQ_TYPE_;
1199 } else {
1200 SMSC_TRACE(IFUP, "irq type: open drain");
1201 }
1202
1203 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1204
1205 SMSC_TRACE(IFUP, "Testing irq handler using IRQ %d", dev->irq);
1206 pdata->software_irq_signal = 0;
1207 smp_wmb();
1208
1209 temp = smsc911x_reg_read(pdata, INT_EN);
1210 temp |= INT_EN_SW_INT_EN_;
1211 smsc911x_reg_write(pdata, INT_EN, temp);
1212
1213 timeout = 1000;
1214 while (timeout--) {
1215 if (pdata->software_irq_signal)
1216 break;
1217 msleep(1);
1218 }
1219
1220 if (!pdata->software_irq_signal) {
1221 dev_warn(&dev->dev, "ISR failed signaling test (IRQ %d)\n",
1222 dev->irq);
1223 return -ENODEV;
1224 }
1225 SMSC_TRACE(IFUP, "IRQ handler passed test using IRQ %d", dev->irq);
1226
1227 dev_info(&dev->dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1228 (unsigned long)pdata->ioaddr, dev->irq);
1229
1230 /* Bring the PHY up */
1231 phy_start(pdata->phy_dev);
1232
1233 temp = smsc911x_reg_read(pdata, HW_CFG);
1234 /* Preserve TX FIFO size and external PHY configuration */
1235 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1236 temp |= HW_CFG_SF_;
1237 smsc911x_reg_write(pdata, HW_CFG, temp);
1238
1239 temp = smsc911x_reg_read(pdata, FIFO_INT);
1240 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1241 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1242 smsc911x_reg_write(pdata, FIFO_INT, temp);
1243
1244 /* set RX Data offset to 2 bytes for alignment */
1245 smsc911x_reg_write(pdata, RX_CFG, (2 << 8));
1246
1247 /* enable NAPI polling before enabling RX interrupts */
1248 napi_enable(&pdata->napi);
1249
1250 temp = smsc911x_reg_read(pdata, INT_EN);
1251 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1252 smsc911x_reg_write(pdata, INT_EN, temp);
1253
1254 spin_lock_irq(&pdata->mac_lock);
1255 temp = smsc911x_mac_read(pdata, MAC_CR);
1256 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1257 smsc911x_mac_write(pdata, MAC_CR, temp);
1258 spin_unlock_irq(&pdata->mac_lock);
1259
1260 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1261
1262 netif_start_queue(dev);
1263 return 0;
1264 }
1265
1266 /* Entry point for stopping the interface */
1267 static int smsc911x_stop(struct net_device *dev)
1268 {
1269 struct smsc911x_data *pdata = netdev_priv(dev);
1270 unsigned int temp;
1271
1272 /* Disable all device interrupts */
1273 temp = smsc911x_reg_read(pdata, INT_CFG);
1274 temp &= ~INT_CFG_IRQ_EN_;
1275 smsc911x_reg_write(pdata, INT_CFG, temp);
1276
1277 /* Stop Tx and Rx polling */
1278 netif_stop_queue(dev);
1279 napi_disable(&pdata->napi);
1280
1281 /* At this point all Rx and Tx activity is stopped */
1282 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1283 smsc911x_tx_update_txcounters(dev);
1284
1285 /* Bring the PHY down */
1286 if (pdata->phy_dev)
1287 phy_stop(pdata->phy_dev);
1288
1289 SMSC_TRACE(IFDOWN, "Interface stopped");
1290 return 0;
1291 }
1292
1293 /* Entry point for transmitting a packet */
1294 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1295 {
1296 struct smsc911x_data *pdata = netdev_priv(dev);
1297 unsigned int freespace;
1298 unsigned int tx_cmd_a;
1299 unsigned int tx_cmd_b;
1300 unsigned int temp;
1301 u32 wrsz;
1302 ulong bufp;
1303
1304 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1305
1306 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1307 SMSC_WARNING(TX_ERR,
1308 "Tx data fifo low, space available: %d", freespace);
1309
1310 /* Word alignment adjustment */
1311 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1312 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1313 tx_cmd_a |= (unsigned int)skb->len;
1314
1315 tx_cmd_b = ((unsigned int)skb->len) << 16;
1316 tx_cmd_b |= (unsigned int)skb->len;
1317
1318 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1319 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1320
1321 bufp = (ulong)skb->data & (~0x3);
1322 wrsz = (u32)skb->len + 3;
1323 wrsz += (u32)((ulong)skb->data & 0x3);
1324 wrsz >>= 2;
1325
1326 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1327 freespace -= (skb->len + 32);
1328 dev_kfree_skb(skb);
1329 dev->trans_start = jiffies;
1330
1331 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1332 smsc911x_tx_update_txcounters(dev);
1333
1334 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1335 netif_stop_queue(dev);
1336 temp = smsc911x_reg_read(pdata, FIFO_INT);
1337 temp &= 0x00FFFFFF;
1338 temp |= 0x32000000;
1339 smsc911x_reg_write(pdata, FIFO_INT, temp);
1340 }
1341
1342 return NETDEV_TX_OK;
1343 }
1344
1345 /* Entry point for getting status counters */
1346 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1347 {
1348 struct smsc911x_data *pdata = netdev_priv(dev);
1349 smsc911x_tx_update_txcounters(dev);
1350 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1351 return &dev->stats;
1352 }
1353
1354 /* Entry point for setting addressing modes */
1355 static void smsc911x_set_multicast_list(struct net_device *dev)
1356 {
1357 struct smsc911x_data *pdata = netdev_priv(dev);
1358 unsigned long flags;
1359
1360 if (dev->flags & IFF_PROMISC) {
1361 /* Enabling promiscuous mode */
1362 pdata->set_bits_mask = MAC_CR_PRMS_;
1363 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1364 pdata->hashhi = 0;
1365 pdata->hashlo = 0;
1366 } else if (dev->flags & IFF_ALLMULTI) {
1367 /* Enabling all multicast mode */
1368 pdata->set_bits_mask = MAC_CR_MCPAS_;
1369 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1370 pdata->hashhi = 0;
1371 pdata->hashlo = 0;
1372 } else if (dev->mc_count > 0) {
1373 /* Enabling specific multicast addresses */
1374 unsigned int hash_high = 0;
1375 unsigned int hash_low = 0;
1376 unsigned int count = 0;
1377 struct dev_mc_list *mc_list = dev->mc_list;
1378
1379 pdata->set_bits_mask = MAC_CR_HPFILT_;
1380 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1381
1382 while (mc_list) {
1383 count++;
1384 if ((mc_list->dmi_addrlen) == ETH_ALEN) {
1385 unsigned int bitnum =
1386 smsc911x_hash(mc_list->dmi_addr);
1387 unsigned int mask = 0x01 << (bitnum & 0x1F);
1388 if (bitnum & 0x20)
1389 hash_high |= mask;
1390 else
1391 hash_low |= mask;
1392 } else {
1393 SMSC_WARNING(DRV, "dmi_addrlen != 6");
1394 }
1395 mc_list = mc_list->next;
1396 }
1397 if (count != (unsigned int)dev->mc_count)
1398 SMSC_WARNING(DRV, "mc_count != dev->mc_count");
1399
1400 pdata->hashhi = hash_high;
1401 pdata->hashlo = hash_low;
1402 } else {
1403 /* Enabling local MAC address only */
1404 pdata->set_bits_mask = 0;
1405 pdata->clear_bits_mask =
1406 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1407 pdata->hashhi = 0;
1408 pdata->hashlo = 0;
1409 }
1410
1411 spin_lock_irqsave(&pdata->mac_lock, flags);
1412
1413 if (pdata->generation <= 1) {
1414 /* Older hardware revision - cannot change these flags while
1415 * receiving data */
1416 if (!pdata->multicast_update_pending) {
1417 unsigned int temp;
1418 SMSC_TRACE(HW, "scheduling mcast update");
1419 pdata->multicast_update_pending = 1;
1420
1421 /* Request the hardware to stop, then perform the
1422 * update when we get an RX_STOP interrupt */
1423 temp = smsc911x_mac_read(pdata, MAC_CR);
1424 temp &= ~(MAC_CR_RXEN_);
1425 smsc911x_mac_write(pdata, MAC_CR, temp);
1426 } else {
1427 /* There is another update pending, this should now
1428 * use the newer values */
1429 }
1430 } else {
1431 /* Newer hardware revision - can write immediately */
1432 smsc911x_rx_multicast_update(pdata);
1433 }
1434
1435 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1436 }
1437
1438 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1439 {
1440 struct net_device *dev = dev_id;
1441 struct smsc911x_data *pdata = netdev_priv(dev);
1442 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1443 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1444 int serviced = IRQ_NONE;
1445 u32 temp;
1446
1447 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1448 temp = smsc911x_reg_read(pdata, INT_EN);
1449 temp &= (~INT_EN_SW_INT_EN_);
1450 smsc911x_reg_write(pdata, INT_EN, temp);
1451 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1452 pdata->software_irq_signal = 1;
1453 smp_wmb();
1454 serviced = IRQ_HANDLED;
1455 }
1456
1457 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1458 /* Called when there is a multicast update scheduled and
1459 * it is now safe to complete the update */
1460 SMSC_TRACE(INTR, "RX Stop interrupt");
1461 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1462 if (pdata->multicast_update_pending)
1463 smsc911x_rx_multicast_update_workaround(pdata);
1464 serviced = IRQ_HANDLED;
1465 }
1466
1467 if (intsts & inten & INT_STS_TDFA_) {
1468 temp = smsc911x_reg_read(pdata, FIFO_INT);
1469 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1470 smsc911x_reg_write(pdata, FIFO_INT, temp);
1471 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1472 netif_wake_queue(dev);
1473 serviced = IRQ_HANDLED;
1474 }
1475
1476 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1477 SMSC_TRACE(INTR, "RX Error interrupt");
1478 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1479 serviced = IRQ_HANDLED;
1480 }
1481
1482 if (likely(intsts & inten & INT_STS_RSFL_)) {
1483 if (likely(napi_schedule_prep(&pdata->napi))) {
1484 /* Disable Rx interrupts */
1485 temp = smsc911x_reg_read(pdata, INT_EN);
1486 temp &= (~INT_EN_RSFL_EN_);
1487 smsc911x_reg_write(pdata, INT_EN, temp);
1488 /* Schedule a NAPI poll */
1489 __napi_schedule(&pdata->napi);
1490 } else {
1491 SMSC_WARNING(RX_ERR,
1492 "napi_schedule_prep failed");
1493 }
1494 serviced = IRQ_HANDLED;
1495 }
1496
1497 return serviced;
1498 }
1499
1500 #ifdef CONFIG_NET_POLL_CONTROLLER
1501 static void smsc911x_poll_controller(struct net_device *dev)
1502 {
1503 disable_irq(dev->irq);
1504 smsc911x_irqhandler(0, dev);
1505 enable_irq(dev->irq);
1506 }
1507 #endif /* CONFIG_NET_POLL_CONTROLLER */
1508
1509 /* Standard ioctls for mii-tool */
1510 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1511 {
1512 struct smsc911x_data *pdata = netdev_priv(dev);
1513
1514 if (!netif_running(dev) || !pdata->phy_dev)
1515 return -EINVAL;
1516
1517 return phy_mii_ioctl(pdata->phy_dev, if_mii(ifr), cmd);
1518 }
1519
1520 static int
1521 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1522 {
1523 struct smsc911x_data *pdata = netdev_priv(dev);
1524
1525 cmd->maxtxpkt = 1;
1526 cmd->maxrxpkt = 1;
1527 return phy_ethtool_gset(pdata->phy_dev, cmd);
1528 }
1529
1530 static int
1531 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1532 {
1533 struct smsc911x_data *pdata = netdev_priv(dev);
1534
1535 return phy_ethtool_sset(pdata->phy_dev, cmd);
1536 }
1537
1538 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1539 struct ethtool_drvinfo *info)
1540 {
1541 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1542 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1543 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1544 sizeof(info->bus_info));
1545 }
1546
1547 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1548 {
1549 struct smsc911x_data *pdata = netdev_priv(dev);
1550
1551 return phy_start_aneg(pdata->phy_dev);
1552 }
1553
1554 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1555 {
1556 struct smsc911x_data *pdata = netdev_priv(dev);
1557 return pdata->msg_enable;
1558 }
1559
1560 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1561 {
1562 struct smsc911x_data *pdata = netdev_priv(dev);
1563 pdata->msg_enable = level;
1564 }
1565
1566 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1567 {
1568 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1569 sizeof(u32);
1570 }
1571
1572 static void
1573 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1574 void *buf)
1575 {
1576 struct smsc911x_data *pdata = netdev_priv(dev);
1577 struct phy_device *phy_dev = pdata->phy_dev;
1578 unsigned long flags;
1579 unsigned int i;
1580 unsigned int j = 0;
1581 u32 *data = buf;
1582
1583 regs->version = pdata->idrev;
1584 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1585 data[j++] = smsc911x_reg_read(pdata, i);
1586
1587 for (i = MAC_CR; i <= WUCSR; i++) {
1588 spin_lock_irqsave(&pdata->mac_lock, flags);
1589 data[j++] = smsc911x_mac_read(pdata, i);
1590 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1591 }
1592
1593 for (i = 0; i <= 31; i++)
1594 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
1595 }
1596
1597 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
1598 {
1599 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
1600 temp &= ~GPIO_CFG_EEPR_EN_;
1601 smsc911x_reg_write(pdata, GPIO_CFG, temp);
1602 msleep(1);
1603 }
1604
1605 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
1606 {
1607 int timeout = 100;
1608 u32 e2cmd;
1609
1610 SMSC_TRACE(DRV, "op 0x%08x", op);
1611 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
1612 SMSC_WARNING(DRV, "Busy at start");
1613 return -EBUSY;
1614 }
1615
1616 e2cmd = op | E2P_CMD_EPC_BUSY_;
1617 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
1618
1619 do {
1620 msleep(1);
1621 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
1622 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (timeout--));
1623
1624 if (!timeout) {
1625 SMSC_TRACE(DRV, "TIMED OUT");
1626 return -EAGAIN;
1627 }
1628
1629 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
1630 SMSC_TRACE(DRV, "Error occured during eeprom operation");
1631 return -EINVAL;
1632 }
1633
1634 return 0;
1635 }
1636
1637 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
1638 u8 address, u8 *data)
1639 {
1640 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
1641 int ret;
1642
1643 SMSC_TRACE(DRV, "address 0x%x", address);
1644 ret = smsc911x_eeprom_send_cmd(pdata, op);
1645
1646 if (!ret)
1647 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
1648
1649 return ret;
1650 }
1651
1652 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
1653 u8 address, u8 data)
1654 {
1655 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
1656 int ret;
1657
1658 SMSC_TRACE(DRV, "address 0x%x, data 0x%x", address, data);
1659 ret = smsc911x_eeprom_send_cmd(pdata, op);
1660
1661 if (!ret) {
1662 op = E2P_CMD_EPC_CMD_WRITE_ | address;
1663 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
1664 ret = smsc911x_eeprom_send_cmd(pdata, op);
1665 }
1666
1667 return ret;
1668 }
1669
1670 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
1671 {
1672 return SMSC911X_EEPROM_SIZE;
1673 }
1674
1675 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
1676 struct ethtool_eeprom *eeprom, u8 *data)
1677 {
1678 struct smsc911x_data *pdata = netdev_priv(dev);
1679 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
1680 int len;
1681 int i;
1682
1683 smsc911x_eeprom_enable_access(pdata);
1684
1685 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
1686 for (i = 0; i < len; i++) {
1687 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
1688 if (ret < 0) {
1689 eeprom->len = 0;
1690 return ret;
1691 }
1692 }
1693
1694 memcpy(data, &eeprom_data[eeprom->offset], len);
1695 eeprom->len = len;
1696 return 0;
1697 }
1698
1699 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
1700 struct ethtool_eeprom *eeprom, u8 *data)
1701 {
1702 int ret;
1703 struct smsc911x_data *pdata = netdev_priv(dev);
1704
1705 smsc911x_eeprom_enable_access(pdata);
1706 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
1707 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
1708 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
1709
1710 /* Single byte write, according to man page */
1711 eeprom->len = 1;
1712
1713 return ret;
1714 }
1715
1716 static const struct ethtool_ops smsc911x_ethtool_ops = {
1717 .get_settings = smsc911x_ethtool_getsettings,
1718 .set_settings = smsc911x_ethtool_setsettings,
1719 .get_link = ethtool_op_get_link,
1720 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
1721 .nway_reset = smsc911x_ethtool_nwayreset,
1722 .get_msglevel = smsc911x_ethtool_getmsglevel,
1723 .set_msglevel = smsc911x_ethtool_setmsglevel,
1724 .get_regs_len = smsc911x_ethtool_getregslen,
1725 .get_regs = smsc911x_ethtool_getregs,
1726 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
1727 .get_eeprom = smsc911x_ethtool_get_eeprom,
1728 .set_eeprom = smsc911x_ethtool_set_eeprom,
1729 };
1730
1731 static const struct net_device_ops smsc911x_netdev_ops = {
1732 .ndo_open = smsc911x_open,
1733 .ndo_stop = smsc911x_stop,
1734 .ndo_start_xmit = smsc911x_hard_start_xmit,
1735 .ndo_get_stats = smsc911x_get_stats,
1736 .ndo_set_multicast_list = smsc911x_set_multicast_list,
1737 .ndo_do_ioctl = smsc911x_do_ioctl,
1738 .ndo_validate_addr = eth_validate_addr,
1739 .ndo_set_mac_address = eth_mac_addr,
1740 #ifdef CONFIG_NET_POLL_CONTROLLER
1741 .ndo_poll_controller = smsc911x_poll_controller,
1742 #endif
1743 };
1744
1745 /* copies the current mac address from hardware to dev->dev_addr */
1746 static void __devinit smsc911x_read_mac_address(struct net_device *dev)
1747 {
1748 struct smsc911x_data *pdata = netdev_priv(dev);
1749 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
1750 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
1751
1752 dev->dev_addr[0] = (u8)(mac_low32);
1753 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
1754 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
1755 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
1756 dev->dev_addr[4] = (u8)(mac_high16);
1757 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
1758 }
1759
1760 /* Initializing private device structures, only called from probe */
1761 static int __devinit smsc911x_init(struct net_device *dev)
1762 {
1763 struct smsc911x_data *pdata = netdev_priv(dev);
1764 unsigned int byte_test;
1765
1766 SMSC_TRACE(PROBE, "Driver Parameters:");
1767 SMSC_TRACE(PROBE, "LAN base: 0x%08lX",
1768 (unsigned long)pdata->ioaddr);
1769 SMSC_TRACE(PROBE, "IRQ: %d", dev->irq);
1770 SMSC_TRACE(PROBE, "PHY will be autodetected.");
1771
1772 spin_lock_init(&pdata->dev_lock);
1773
1774 if (pdata->ioaddr == 0) {
1775 SMSC_WARNING(PROBE, "pdata->ioaddr: 0x00000000");
1776 return -ENODEV;
1777 }
1778
1779 /* Check byte ordering */
1780 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1781 SMSC_TRACE(PROBE, "BYTE_TEST: 0x%08X", byte_test);
1782 if (byte_test == 0x43218765) {
1783 SMSC_TRACE(PROBE, "BYTE_TEST looks swapped, "
1784 "applying WORD_SWAP");
1785 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
1786
1787 /* 1 dummy read of BYTE_TEST is needed after a write to
1788 * WORD_SWAP before its contents are valid */
1789 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1790
1791 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1792 }
1793
1794 if (byte_test != 0x87654321) {
1795 SMSC_WARNING(DRV, "BYTE_TEST: 0x%08X", byte_test);
1796 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
1797 SMSC_WARNING(PROBE,
1798 "top 16 bits equal to bottom 16 bits");
1799 SMSC_TRACE(PROBE, "This may mean the chip is set "
1800 "for 32 bit while the bus is reading 16 bit");
1801 }
1802 return -ENODEV;
1803 }
1804
1805 /* Default generation to zero (all workarounds apply) */
1806 pdata->generation = 0;
1807
1808 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
1809 switch (pdata->idrev & 0xFFFF0000) {
1810 case 0x01180000:
1811 case 0x01170000:
1812 case 0x01160000:
1813 case 0x01150000:
1814 /* LAN911[5678] family */
1815 pdata->generation = pdata->idrev & 0x0000FFFF;
1816 break;
1817
1818 case 0x118A0000:
1819 case 0x117A0000:
1820 case 0x116A0000:
1821 case 0x115A0000:
1822 /* LAN921[5678] family */
1823 pdata->generation = 3;
1824 break;
1825
1826 case 0x92100000:
1827 case 0x92110000:
1828 case 0x92200000:
1829 case 0x92210000:
1830 /* LAN9210/LAN9211/LAN9220/LAN9221 */
1831 pdata->generation = 4;
1832 break;
1833
1834 default:
1835 SMSC_WARNING(PROBE, "LAN911x not identified, idrev: 0x%08X",
1836 pdata->idrev);
1837 return -ENODEV;
1838 }
1839
1840 SMSC_TRACE(PROBE, "LAN911x identified, idrev: 0x%08X, generation: %d",
1841 pdata->idrev, pdata->generation);
1842
1843 if (pdata->generation == 0)
1844 SMSC_WARNING(PROBE,
1845 "This driver is not intended for this chip revision");
1846
1847 /* workaround for platforms without an eeprom, where the mac address
1848 * is stored elsewhere and set by the bootloader. This saves the
1849 * mac address before resetting the device */
1850 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS)
1851 smsc911x_read_mac_address(dev);
1852
1853 /* Reset the LAN911x */
1854 if (smsc911x_soft_reset(pdata))
1855 return -ENODEV;
1856
1857 /* Disable all interrupt sources until we bring the device up */
1858 smsc911x_reg_write(pdata, INT_EN, 0);
1859
1860 ether_setup(dev);
1861 dev->flags |= IFF_MULTICAST;
1862 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
1863 dev->netdev_ops = &smsc911x_netdev_ops;
1864 dev->ethtool_ops = &smsc911x_ethtool_ops;
1865
1866 return 0;
1867 }
1868
1869 static int __devexit smsc911x_drv_remove(struct platform_device *pdev)
1870 {
1871 struct net_device *dev;
1872 struct smsc911x_data *pdata;
1873 struct resource *res;
1874
1875 dev = platform_get_drvdata(pdev);
1876 BUG_ON(!dev);
1877 pdata = netdev_priv(dev);
1878 BUG_ON(!pdata);
1879 BUG_ON(!pdata->ioaddr);
1880 BUG_ON(!pdata->phy_dev);
1881
1882 SMSC_TRACE(IFDOWN, "Stopping driver.");
1883
1884 phy_disconnect(pdata->phy_dev);
1885 pdata->phy_dev = NULL;
1886 mdiobus_unregister(pdata->mii_bus);
1887 mdiobus_free(pdata->mii_bus);
1888
1889 platform_set_drvdata(pdev, NULL);
1890 unregister_netdev(dev);
1891 free_irq(dev->irq, dev);
1892 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1893 "smsc911x-memory");
1894 if (!res)
1895 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1896
1897 release_mem_region(res->start, res->end - res->start);
1898
1899 iounmap(pdata->ioaddr);
1900
1901 free_netdev(dev);
1902
1903 return 0;
1904 }
1905
1906 static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
1907 {
1908 struct net_device *dev;
1909 struct smsc911x_data *pdata;
1910 struct smsc911x_platform_config *config = pdev->dev.platform_data;
1911 struct resource *res, *irq_res;
1912 unsigned int intcfg = 0;
1913 int res_size, irq_flags;
1914 int retval;
1915 DECLARE_MAC_BUF(mac);
1916
1917 pr_info("%s: Driver version %s.\n", SMSC_CHIPNAME, SMSC_DRV_VERSION);
1918
1919 /* platform data specifies irq & dynamic bus configuration */
1920 if (!pdev->dev.platform_data) {
1921 pr_warning("%s: platform_data not provided\n", SMSC_CHIPNAME);
1922 retval = -ENODEV;
1923 goto out_0;
1924 }
1925
1926 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1927 "smsc911x-memory");
1928 if (!res)
1929 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1930 if (!res) {
1931 pr_warning("%s: Could not allocate resource.\n",
1932 SMSC_CHIPNAME);
1933 retval = -ENODEV;
1934 goto out_0;
1935 }
1936 res_size = res->end - res->start;
1937
1938 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1939 if (!irq_res) {
1940 pr_warning("%s: Could not allocate irq resource.\n",
1941 SMSC_CHIPNAME);
1942 retval = -ENODEV;
1943 goto out_0;
1944 }
1945
1946 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
1947 retval = -EBUSY;
1948 goto out_0;
1949 }
1950
1951 dev = alloc_etherdev(sizeof(struct smsc911x_data));
1952 if (!dev) {
1953 pr_warning("%s: Could not allocate device.\n", SMSC_CHIPNAME);
1954 retval = -ENOMEM;
1955 goto out_release_io_1;
1956 }
1957
1958 SET_NETDEV_DEV(dev, &pdev->dev);
1959
1960 pdata = netdev_priv(dev);
1961
1962 dev->irq = irq_res->start;
1963 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
1964 pdata->ioaddr = ioremap_nocache(res->start, res_size);
1965
1966 /* copy config parameters across to pdata */
1967 memcpy(&pdata->config, config, sizeof(pdata->config));
1968
1969 pdata->dev = dev;
1970 pdata->msg_enable = ((1 << debug) - 1);
1971
1972 if (pdata->ioaddr == NULL) {
1973 SMSC_WARNING(PROBE,
1974 "Error smsc911x base address invalid");
1975 retval = -ENOMEM;
1976 goto out_free_netdev_2;
1977 }
1978
1979 retval = smsc911x_init(dev);
1980 if (retval < 0)
1981 goto out_unmap_io_3;
1982
1983 /* configure irq polarity and type before connecting isr */
1984 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
1985 intcfg |= INT_CFG_IRQ_POL_;
1986
1987 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
1988 intcfg |= INT_CFG_IRQ_TYPE_;
1989
1990 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1991
1992 /* Ensure interrupts are globally disabled before connecting ISR */
1993 smsc911x_reg_write(pdata, INT_EN, 0);
1994 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1995
1996 retval = request_irq(dev->irq, smsc911x_irqhandler,
1997 irq_flags | IRQF_SHARED, dev->name, dev);
1998 if (retval) {
1999 SMSC_WARNING(PROBE,
2000 "Unable to claim requested irq: %d", dev->irq);
2001 goto out_unmap_io_3;
2002 }
2003
2004 platform_set_drvdata(pdev, dev);
2005
2006 retval = register_netdev(dev);
2007 if (retval) {
2008 SMSC_WARNING(PROBE,
2009 "Error %i registering device", retval);
2010 goto out_unset_drvdata_4;
2011 } else {
2012 SMSC_TRACE(PROBE, "Network interface: \"%s\"", dev->name);
2013 }
2014
2015 spin_lock_init(&pdata->mac_lock);
2016
2017 retval = smsc911x_mii_init(pdev, dev);
2018 if (retval) {
2019 SMSC_WARNING(PROBE,
2020 "Error %i initialising mii", retval);
2021 goto out_unregister_netdev_5;
2022 }
2023
2024 spin_lock_irq(&pdata->mac_lock);
2025
2026 /* Check if mac address has been specified when bringing interface up */
2027 if (is_valid_ether_addr(dev->dev_addr)) {
2028 smsc911x_set_mac_address(pdata, dev->dev_addr);
2029 SMSC_TRACE(PROBE, "MAC Address is specified by configuration");
2030 } else {
2031 /* Try reading mac address from device. if EEPROM is present
2032 * it will already have been set */
2033 smsc911x_read_mac_address(dev);
2034
2035 if (is_valid_ether_addr(dev->dev_addr)) {
2036 /* eeprom values are valid so use them */
2037 SMSC_TRACE(PROBE,
2038 "Mac Address is read from LAN911x EEPROM");
2039 } else {
2040 /* eeprom values are invalid, generate random MAC */
2041 random_ether_addr(dev->dev_addr);
2042 smsc911x_set_mac_address(pdata, dev->dev_addr);
2043 SMSC_TRACE(PROBE,
2044 "MAC Address is set to random_ether_addr");
2045 }
2046 }
2047
2048 spin_unlock_irq(&pdata->mac_lock);
2049
2050 dev_info(&dev->dev, "MAC Address: %s\n",
2051 print_mac(mac, dev->dev_addr));
2052
2053 return 0;
2054
2055 out_unregister_netdev_5:
2056 unregister_netdev(dev);
2057 out_unset_drvdata_4:
2058 platform_set_drvdata(pdev, NULL);
2059 free_irq(dev->irq, dev);
2060 out_unmap_io_3:
2061 iounmap(pdata->ioaddr);
2062 out_free_netdev_2:
2063 free_netdev(dev);
2064 out_release_io_1:
2065 release_mem_region(res->start, res->end - res->start);
2066 out_0:
2067 return retval;
2068 }
2069
2070 static struct platform_driver smsc911x_driver = {
2071 .probe = smsc911x_drv_probe,
2072 .remove = smsc911x_drv_remove,
2073 .driver = {
2074 .name = SMSC_CHIPNAME,
2075 },
2076 };
2077
2078 /* Entry point for loading the module */
2079 static int __init smsc911x_init_module(void)
2080 {
2081 return platform_driver_register(&smsc911x_driver);
2082 }
2083
2084 /* entry point for unloading the module */
2085 static void __exit smsc911x_cleanup_module(void)
2086 {
2087 platform_driver_unregister(&smsc911x_driver);
2088 }
2089
2090 module_init(smsc911x_init_module);
2091 module_exit(smsc911x_cleanup_module);
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