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Fix gcc 4.5.1 miscompiling drivers/char/i8k.c (again)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / smsc911x.c
blob494cd91ea39c5956102eb4afee1808295d2c5d18
1 /***************************************************************************
2 *
3 * Copyright (C) 2004-2008 SMSC
4 * Copyright (C) 2005-2008 ARM
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 *
20 ***************************************************************************
21 * Rewritten, heavily based on smsc911x simple driver by SMSC.
22 * Partly uses io macros from smc91x.c by Nicolas Pitre
23 *
24 * Supported devices:
25 * LAN9115, LAN9116, LAN9117, LAN9118
26 * LAN9215, LAN9216, LAN9217, LAN9218
27 * LAN9210, LAN9211
28 * LAN9220, LAN9221
29 *
30 */
31
32 #include <linux/crc32.h>
33 #include <linux/delay.h>
34 #include <linux/errno.h>
35 #include <linux/etherdevice.h>
36 #include <linux/ethtool.h>
37 #include <linux/init.h>
38 #include <linux/ioport.h>
39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/netdevice.h>
42 #include <linux/platform_device.h>
43 #include <linux/sched.h>
44 #include <linux/slab.h>
45 #include <linux/timer.h>
46 #include <linux/bug.h>
47 #include <linux/bitops.h>
48 #include <linux/irq.h>
49 #include <linux/io.h>
50 #include <linux/swab.h>
51 #include <linux/phy.h>
52 #include <linux/smsc911x.h>
53 #include <linux/device.h>
54 #include "smsc911x.h"
55
56 #define SMSC_CHIPNAME "smsc911x"
57 #define SMSC_MDIONAME "smsc911x-mdio"
58 #define SMSC_DRV_VERSION "2008-10-21"
59
60 MODULE_LICENSE("GPL");
61 MODULE_VERSION(SMSC_DRV_VERSION);
62
63 #if USE_DEBUG > 0
64 static int debug = 16;
65 #else
66 static int debug = 3;
67 #endif
68
69 module_param(debug, int, 0);
70 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
71
72 struct smsc911x_data {
73 void __iomem *ioaddr;
74
75 unsigned int idrev;
76
77 /* used to decide which workarounds apply */
78 unsigned int generation;
79
80 /* device configuration (copied from platform_data during probe) */
81 struct smsc911x_platform_config config;
82
83 /* This needs to be acquired before calling any of below:
84 * smsc911x_mac_read(), smsc911x_mac_write()
85 */
86 spinlock_t mac_lock;
87
88 /* spinlock to ensure 16-bit accesses are serialised.
89 * unused with a 32-bit bus */
90 spinlock_t dev_lock;
91
92 struct phy_device *phy_dev;
93 struct mii_bus *mii_bus;
94 int phy_irq[PHY_MAX_ADDR];
95 unsigned int using_extphy;
96 int last_duplex;
97 int last_carrier;
98
99 u32 msg_enable;
100 unsigned int gpio_setting;
101 unsigned int gpio_orig_setting;
102 struct net_device *dev;
103 struct napi_struct napi;
104
105 unsigned int software_irq_signal;
106
107 #ifdef USE_PHY_WORK_AROUND
108 #define MIN_PACKET_SIZE (64)
109 char loopback_tx_pkt[MIN_PACKET_SIZE];
110 char loopback_rx_pkt[MIN_PACKET_SIZE];
111 unsigned int resetcount;
112 #endif
113
114 /* Members for Multicast filter workaround */
115 unsigned int multicast_update_pending;
116 unsigned int set_bits_mask;
117 unsigned int clear_bits_mask;
118 unsigned int hashhi;
119 unsigned int hashlo;
120 };
121
122 /* The 16-bit access functions are significantly slower, due to the locking
123 * necessary. If your bus hardware can be configured to do this for you
124 * (in response to a single 32-bit operation from software), you should use
125 * the 32-bit access functions instead. */
126
127 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
128 {
129 if (pdata->config.flags & SMSC911X_USE_32BIT)
130 return readl(pdata->ioaddr + reg);
131
132 if (pdata->config.flags & SMSC911X_USE_16BIT) {
133 u32 data;
134 unsigned long flags;
135
136 /* these two 16-bit reads must be performed consecutively, so
137 * must not be interrupted by our own ISR (which would start
138 * another read operation) */
139 spin_lock_irqsave(&pdata->dev_lock, flags);
140 data = ((readw(pdata->ioaddr + reg) & 0xFFFF) |
141 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
142 spin_unlock_irqrestore(&pdata->dev_lock, flags);
143
144 return data;
145 }
146
147 BUG();
148 return 0;
149 }
150
151 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
152 u32 val)
153 {
154 if (pdata->config.flags & SMSC911X_USE_32BIT) {
155 writel(val, pdata->ioaddr + reg);
156 return;
157 }
158
159 if (pdata->config.flags & SMSC911X_USE_16BIT) {
160 unsigned long flags;
161
162 /* these two 16-bit writes must be performed consecutively, so
163 * must not be interrupted by our own ISR (which would start
164 * another read operation) */
165 spin_lock_irqsave(&pdata->dev_lock, flags);
166 writew(val & 0xFFFF, pdata->ioaddr + reg);
167 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
168 spin_unlock_irqrestore(&pdata->dev_lock, flags);
169 return;
170 }
171
172 BUG();
173 }
174
175 /* Writes a packet to the TX_DATA_FIFO */
176 static inline void
177 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
178 unsigned int wordcount)
179 {
180 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
181 while (wordcount--)
182 smsc911x_reg_write(pdata, TX_DATA_FIFO, swab32(*buf++));
183 return;
184 }
185
186 if (pdata->config.flags & SMSC911X_USE_32BIT) {
187 writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
188 return;
189 }
190
191 if (pdata->config.flags & SMSC911X_USE_16BIT) {
192 while (wordcount--)
193 smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
194 return;
195 }
196
197 BUG();
198 }
199
200 /* Reads a packet out of the RX_DATA_FIFO */
201 static inline void
202 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
203 unsigned int wordcount)
204 {
205 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
206 while (wordcount--)
207 *buf++ = swab32(smsc911x_reg_read(pdata, RX_DATA_FIFO));
208 return;
209 }
210
211 if (pdata->config.flags & SMSC911X_USE_32BIT) {
212 readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
213 return;
214 }
215
216 if (pdata->config.flags & SMSC911X_USE_16BIT) {
217 while (wordcount--)
218 *buf++ = smsc911x_reg_read(pdata, RX_DATA_FIFO);
219 return;
220 }
221
222 BUG();
223 }
224
225 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
226 * and smsc911x_mac_write, so assumes mac_lock is held */
227 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
228 {
229 int i;
230 u32 val;
231
232 SMSC_ASSERT_MAC_LOCK(pdata);
233
234 for (i = 0; i < 40; i++) {
235 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
236 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
237 return 0;
238 }
239 SMSC_WARNING(HW, "Timed out waiting for MAC not BUSY. "
240 "MAC_CSR_CMD: 0x%08X", val);
241 return -EIO;
242 }
243
244 /* Fetches a MAC register value. Assumes mac_lock is acquired */
245 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
246 {
247 unsigned int temp;
248
249 SMSC_ASSERT_MAC_LOCK(pdata);
250
251 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
252 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
253 SMSC_WARNING(HW, "MAC busy at entry");
254 return 0xFFFFFFFF;
255 }
256
257 /* Send the MAC cmd */
258 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
259 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
260
261 /* Workaround for hardware read-after-write restriction */
262 temp = smsc911x_reg_read(pdata, BYTE_TEST);
263
264 /* Wait for the read to complete */
265 if (likely(smsc911x_mac_complete(pdata) == 0))
266 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
267
268 SMSC_WARNING(HW, "MAC busy after read");
269 return 0xFFFFFFFF;
270 }
271
272 /* Set a mac register, mac_lock must be acquired before calling */
273 static void smsc911x_mac_write(struct smsc911x_data *pdata,
274 unsigned int offset, u32 val)
275 {
276 unsigned int temp;
277
278 SMSC_ASSERT_MAC_LOCK(pdata);
279
280 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
281 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
282 SMSC_WARNING(HW,
283 "smsc911x_mac_write failed, MAC busy at entry");
284 return;
285 }
286
287 /* Send data to write */
288 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
289
290 /* Write the actual data */
291 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
292 MAC_CSR_CMD_CSR_BUSY_));
293
294 /* Workaround for hardware read-after-write restriction */
295 temp = smsc911x_reg_read(pdata, BYTE_TEST);
296
297 /* Wait for the write to complete */
298 if (likely(smsc911x_mac_complete(pdata) == 0))
299 return;
300
301 SMSC_WARNING(HW,
302 "smsc911x_mac_write failed, MAC busy after write");
303 }
304
305 /* Get a phy register */
306 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
307 {
308 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
309 unsigned long flags;
310 unsigned int addr;
311 int i, reg;
312
313 spin_lock_irqsave(&pdata->mac_lock, flags);
314
315 /* Confirm MII not busy */
316 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
317 SMSC_WARNING(HW,
318 "MII is busy in smsc911x_mii_read???");
319 reg = -EIO;
320 goto out;
321 }
322
323 /* Set the address, index & direction (read from PHY) */
324 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
325 smsc911x_mac_write(pdata, MII_ACC, addr);
326
327 /* Wait for read to complete w/ timeout */
328 for (i = 0; i < 100; i++)
329 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
330 reg = smsc911x_mac_read(pdata, MII_DATA);
331 goto out;
332 }
333
334 SMSC_WARNING(HW, "Timed out waiting for MII read to finish");
335 reg = -EIO;
336
337 out:
338 spin_unlock_irqrestore(&pdata->mac_lock, flags);
339 return reg;
340 }
341
342 /* Set a phy register */
343 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
344 u16 val)
345 {
346 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
347 unsigned long flags;
348 unsigned int addr;
349 int i, reg;
350
351 spin_lock_irqsave(&pdata->mac_lock, flags);
352
353 /* Confirm MII not busy */
354 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
355 SMSC_WARNING(HW,
356 "MII is busy in smsc911x_mii_write???");
357 reg = -EIO;
358 goto out;
359 }
360
361 /* Put the data to write in the MAC */
362 smsc911x_mac_write(pdata, MII_DATA, val);
363
364 /* Set the address, index & direction (write to PHY) */
365 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
366 MII_ACC_MII_WRITE_;
367 smsc911x_mac_write(pdata, MII_ACC, addr);
368
369 /* Wait for write to complete w/ timeout */
370 for (i = 0; i < 100; i++)
371 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
372 reg = 0;
373 goto out;
374 }
375
376 SMSC_WARNING(HW, "Timed out waiting for MII write to finish");
377 reg = -EIO;
378
379 out:
380 spin_unlock_irqrestore(&pdata->mac_lock, flags);
381 return reg;
382 }
383
384 /* Switch to external phy. Assumes tx and rx are stopped. */
385 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
386 {
387 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
388
389 /* Disable phy clocks to the MAC */
390 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
391 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
392 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
393 udelay(10); /* Enough time for clocks to stop */
394
395 /* Switch to external phy */
396 hwcfg |= HW_CFG_EXT_PHY_EN_;
397 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
398
399 /* Enable phy clocks to the MAC */
400 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
401 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
402 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
403 udelay(10); /* Enough time for clocks to restart */
404
405 hwcfg |= HW_CFG_SMI_SEL_;
406 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
407 }
408
409 /* Autodetects and enables external phy if present on supported chips.
410 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
411 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
412 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
413 {
414 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
415
416 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
417 SMSC_TRACE(HW, "Forcing internal PHY");
418 pdata->using_extphy = 0;
419 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
420 SMSC_TRACE(HW, "Forcing external PHY");
421 smsc911x_phy_enable_external(pdata);
422 pdata->using_extphy = 1;
423 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
424 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET set, using external PHY");
425 smsc911x_phy_enable_external(pdata);
426 pdata->using_extphy = 1;
427 } else {
428 SMSC_TRACE(HW, "HW_CFG EXT_PHY_DET clear, using internal PHY");
429 pdata->using_extphy = 0;
430 }
431 }
432
433 /* Fetches a tx status out of the status fifo */
434 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
435 {
436 unsigned int result =
437 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
438
439 if (result != 0)
440 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
441
442 return result;
443 }
444
445 /* Fetches the next rx status */
446 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
447 {
448 unsigned int result =
449 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
450
451 if (result != 0)
452 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
453
454 return result;
455 }
456
457 #ifdef USE_PHY_WORK_AROUND
458 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
459 {
460 unsigned int tries;
461 u32 wrsz;
462 u32 rdsz;
463 ulong bufp;
464
465 for (tries = 0; tries < 10; tries++) {
466 unsigned int txcmd_a;
467 unsigned int txcmd_b;
468 unsigned int status;
469 unsigned int pktlength;
470 unsigned int i;
471
472 /* Zero-out rx packet memory */
473 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
474
475 /* Write tx packet to 118 */
476 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
477 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
478 txcmd_a |= MIN_PACKET_SIZE;
479
480 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
481
482 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
483 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
484
485 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
486 wrsz = MIN_PACKET_SIZE + 3;
487 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
488 wrsz >>= 2;
489
490 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
491
492 /* Wait till transmit is done */
493 i = 60;
494 do {
495 udelay(5);
496 status = smsc911x_tx_get_txstatus(pdata);
497 } while ((i--) && (!status));
498
499 if (!status) {
500 SMSC_WARNING(HW, "Failed to transmit "
501 "during loopback test");
502 continue;
503 }
504 if (status & TX_STS_ES_) {
505 SMSC_WARNING(HW, "Transmit encountered "
506 "errors during loopback test");
507 continue;
508 }
509
510 /* Wait till receive is done */
511 i = 60;
512 do {
513 udelay(5);
514 status = smsc911x_rx_get_rxstatus(pdata);
515 } while ((i--) && (!status));
516
517 if (!status) {
518 SMSC_WARNING(HW,
519 "Failed to receive during loopback test");
520 continue;
521 }
522 if (status & RX_STS_ES_) {
523 SMSC_WARNING(HW, "Receive encountered "
524 "errors during loopback test");
525 continue;
526 }
527
528 pktlength = ((status & 0x3FFF0000UL) >> 16);
529 bufp = (ulong)pdata->loopback_rx_pkt;
530 rdsz = pktlength + 3;
531 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
532 rdsz >>= 2;
533
534 smsc911x_rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
535
536 if (pktlength != (MIN_PACKET_SIZE + 4)) {
537 SMSC_WARNING(HW, "Unexpected packet size "
538 "during loop back test, size=%d, will retry",
539 pktlength);
540 } else {
541 unsigned int j;
542 int mismatch = 0;
543 for (j = 0; j < MIN_PACKET_SIZE; j++) {
544 if (pdata->loopback_tx_pkt[j]
545 != pdata->loopback_rx_pkt[j]) {
546 mismatch = 1;
547 break;
548 }
549 }
550 if (!mismatch) {
551 SMSC_TRACE(HW, "Successfully verified "
552 "loopback packet");
553 return 0;
554 } else {
555 SMSC_WARNING(HW, "Data mismatch "
556 "during loop back test, will retry");
557 }
558 }
559 }
560
561 return -EIO;
562 }
563
564 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
565 {
566 struct phy_device *phy_dev = pdata->phy_dev;
567 unsigned int temp;
568 unsigned int i = 100000;
569
570 BUG_ON(!phy_dev);
571 BUG_ON(!phy_dev->bus);
572
573 SMSC_TRACE(HW, "Performing PHY BCR Reset");
574 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
575 do {
576 msleep(1);
577 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
578 MII_BMCR);
579 } while ((i--) && (temp & BMCR_RESET));
580
581 if (temp & BMCR_RESET) {
582 SMSC_WARNING(HW, "PHY reset failed to complete.");
583 return -EIO;
584 }
585 /* Extra delay required because the phy may not be completed with
586 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
587 * enough delay but using 1ms here to be safe */
588 msleep(1);
589
590 return 0;
591 }
592
593 static int smsc911x_phy_loopbacktest(struct net_device *dev)
594 {
595 struct smsc911x_data *pdata = netdev_priv(dev);
596 struct phy_device *phy_dev = pdata->phy_dev;
597 int result = -EIO;
598 unsigned int i, val;
599 unsigned long flags;
600
601 /* Initialise tx packet using broadcast destination address */
602 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN);
603
604 /* Use incrementing source address */
605 for (i = 6; i < 12; i++)
606 pdata->loopback_tx_pkt[i] = (char)i;
607
608 /* Set length type field */
609 pdata->loopback_tx_pkt[12] = 0x00;
610 pdata->loopback_tx_pkt[13] = 0x00;
611
612 for (i = 14; i < MIN_PACKET_SIZE; i++)
613 pdata->loopback_tx_pkt[i] = (char)i;
614
615 val = smsc911x_reg_read(pdata, HW_CFG);
616 val &= HW_CFG_TX_FIF_SZ_;
617 val |= HW_CFG_SF_;
618 smsc911x_reg_write(pdata, HW_CFG, val);
619
620 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
621 smsc911x_reg_write(pdata, RX_CFG,
622 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
623
624 for (i = 0; i < 10; i++) {
625 /* Set PHY to 10/FD, no ANEG, and loopback mode */
626 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR,
627 BMCR_LOOPBACK | BMCR_FULLDPLX);
628
629 /* Enable MAC tx/rx, FD */
630 spin_lock_irqsave(&pdata->mac_lock, flags);
631 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
632 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
633 spin_unlock_irqrestore(&pdata->mac_lock, flags);
634
635 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
636 result = 0;
637 break;
638 }
639 pdata->resetcount++;
640
641 /* Disable MAC rx */
642 spin_lock_irqsave(&pdata->mac_lock, flags);
643 smsc911x_mac_write(pdata, MAC_CR, 0);
644 spin_unlock_irqrestore(&pdata->mac_lock, flags);
645
646 smsc911x_phy_reset(pdata);
647 }
648
649 /* Disable MAC */
650 spin_lock_irqsave(&pdata->mac_lock, flags);
651 smsc911x_mac_write(pdata, MAC_CR, 0);
652 spin_unlock_irqrestore(&pdata->mac_lock, flags);
653
654 /* Cancel PHY loopback mode */
655 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
656
657 smsc911x_reg_write(pdata, TX_CFG, 0);
658 smsc911x_reg_write(pdata, RX_CFG, 0);
659
660 return result;
661 }
662 #endif /* USE_PHY_WORK_AROUND */
663
664 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
665 {
666 struct phy_device *phy_dev = pdata->phy_dev;
667 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
668 u32 flow;
669 unsigned long flags;
670
671 if (phy_dev->duplex == DUPLEX_FULL) {
672 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
673 u16 rmtadv = phy_read(phy_dev, MII_LPA);
674 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
675
676 if (cap & FLOW_CTRL_RX)
677 flow = 0xFFFF0002;
678 else
679 flow = 0;
680
681 if (cap & FLOW_CTRL_TX)
682 afc |= 0xF;
683 else
684 afc &= ~0xF;
685
686 SMSC_TRACE(HW, "rx pause %s, tx pause %s",
687 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
688 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
689 } else {
690 SMSC_TRACE(HW, "half duplex");
691 flow = 0;
692 afc |= 0xF;
693 }
694
695 spin_lock_irqsave(&pdata->mac_lock, flags);
696 smsc911x_mac_write(pdata, FLOW, flow);
697 spin_unlock_irqrestore(&pdata->mac_lock, flags);
698
699 smsc911x_reg_write(pdata, AFC_CFG, afc);
700 }
701
702 /* Update link mode if anything has changed. Called periodically when the
703 * PHY is in polling mode, even if nothing has changed. */
704 static void smsc911x_phy_adjust_link(struct net_device *dev)
705 {
706 struct smsc911x_data *pdata = netdev_priv(dev);
707 struct phy_device *phy_dev = pdata->phy_dev;
708 unsigned long flags;
709 int carrier;
710
711 if (phy_dev->duplex != pdata->last_duplex) {
712 unsigned int mac_cr;
713 SMSC_TRACE(HW, "duplex state has changed");
714
715 spin_lock_irqsave(&pdata->mac_lock, flags);
716 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
717 if (phy_dev->duplex) {
718 SMSC_TRACE(HW,
719 "configuring for full duplex mode");
720 mac_cr |= MAC_CR_FDPX_;
721 } else {
722 SMSC_TRACE(HW,
723 "configuring for half duplex mode");
724 mac_cr &= ~MAC_CR_FDPX_;
725 }
726 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
727 spin_unlock_irqrestore(&pdata->mac_lock, flags);
728
729 smsc911x_phy_update_flowcontrol(pdata);
730 pdata->last_duplex = phy_dev->duplex;
731 }
732
733 carrier = netif_carrier_ok(dev);
734 if (carrier != pdata->last_carrier) {
735 SMSC_TRACE(HW, "carrier state has changed");
736 if (carrier) {
737 SMSC_TRACE(HW, "configuring for carrier OK");
738 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
739 (!pdata->using_extphy)) {
740 /* Restore orginal GPIO configuration */
741 pdata->gpio_setting = pdata->gpio_orig_setting;
742 smsc911x_reg_write(pdata, GPIO_CFG,
743 pdata->gpio_setting);
744 }
745 } else {
746 SMSC_TRACE(HW, "configuring for no carrier");
747 /* Check global setting that LED1
748 * usage is 10/100 indicator */
749 pdata->gpio_setting = smsc911x_reg_read(pdata,
750 GPIO_CFG);
751 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
752 (!pdata->using_extphy)) {
753 /* Force 10/100 LED off, after saving
754 * orginal GPIO configuration */
755 pdata->gpio_orig_setting = pdata->gpio_setting;
756
757 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
758 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
759 | GPIO_CFG_GPIODIR0_
760 | GPIO_CFG_GPIOD0_);
761 smsc911x_reg_write(pdata, GPIO_CFG,
762 pdata->gpio_setting);
763 }
764 }
765 pdata->last_carrier = carrier;
766 }
767 }
768
769 static int smsc911x_mii_probe(struct net_device *dev)
770 {
771 struct smsc911x_data *pdata = netdev_priv(dev);
772 struct phy_device *phydev = NULL;
773 int phy_addr;
774
775 /* find the first phy */
776 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
777 if (pdata->mii_bus->phy_map[phy_addr]) {
778 phydev = pdata->mii_bus->phy_map[phy_addr];
779 SMSC_TRACE(PROBE, "PHY %d: addr %d, phy_id 0x%08X",
780 phy_addr, phydev->addr, phydev->phy_id);
781 break;
782 }
783 }
784
785 if (!phydev) {
786 pr_err("%s: no PHY found\n", dev->name);
787 return -ENODEV;
788 }
789
790 phydev = phy_connect(dev, dev_name(&phydev->dev),
791 &smsc911x_phy_adjust_link, 0, pdata->config.phy_interface);
792
793 if (IS_ERR(phydev)) {
794 pr_err("%s: Could not attach to PHY\n", dev->name);
795 return PTR_ERR(phydev);
796 }
797
798 pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
799 dev->name, phydev->drv->name,
800 dev_name(&phydev->dev), phydev->irq);
801
802 /* mask with MAC supported features */
803 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
804 SUPPORTED_Asym_Pause);
805 phydev->advertising = phydev->supported;
806
807 pdata->phy_dev = phydev;
808 pdata->last_duplex = -1;
809 pdata->last_carrier = -1;
810
811 #ifdef USE_PHY_WORK_AROUND
812 if (smsc911x_phy_loopbacktest(dev) < 0) {
813 SMSC_WARNING(HW, "Failed Loop Back Test");
814 return -ENODEV;
815 }
816 SMSC_TRACE(HW, "Passed Loop Back Test");
817 #endif /* USE_PHY_WORK_AROUND */
818
819 SMSC_TRACE(HW, "phy initialised successfully");
820 return 0;
821 }
822
823 static int __devinit smsc911x_mii_init(struct platform_device *pdev,
824 struct net_device *dev)
825 {
826 struct smsc911x_data *pdata = netdev_priv(dev);
827 int err = -ENXIO, i;
828
829 pdata->mii_bus = mdiobus_alloc();
830 if (!pdata->mii_bus) {
831 err = -ENOMEM;
832 goto err_out_1;
833 }
834
835 pdata->mii_bus->name = SMSC_MDIONAME;
836 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id);
837 pdata->mii_bus->priv = pdata;
838 pdata->mii_bus->read = smsc911x_mii_read;
839 pdata->mii_bus->write = smsc911x_mii_write;
840 pdata->mii_bus->irq = pdata->phy_irq;
841 for (i = 0; i < PHY_MAX_ADDR; ++i)
842 pdata->mii_bus->irq[i] = PHY_POLL;
843
844 pdata->mii_bus->parent = &pdev->dev;
845
846 switch (pdata->idrev & 0xFFFF0000) {
847 case 0x01170000:
848 case 0x01150000:
849 case 0x117A0000:
850 case 0x115A0000:
851 /* External PHY supported, try to autodetect */
852 smsc911x_phy_initialise_external(pdata);
853 break;
854 default:
855 SMSC_TRACE(HW, "External PHY is not supported, "
856 "using internal PHY");
857 pdata->using_extphy = 0;
858 break;
859 }
860
861 if (!pdata->using_extphy) {
862 /* Mask all PHYs except ID 1 (internal) */
863 pdata->mii_bus->phy_mask = ~(1 << 1);
864 }
865
866 if (mdiobus_register(pdata->mii_bus)) {
867 SMSC_WARNING(PROBE, "Error registering mii bus");
868 goto err_out_free_bus_2;
869 }
870
871 if (smsc911x_mii_probe(dev) < 0) {
872 SMSC_WARNING(PROBE, "Error registering mii bus");
873 goto err_out_unregister_bus_3;
874 }
875
876 return 0;
877
878 err_out_unregister_bus_3:
879 mdiobus_unregister(pdata->mii_bus);
880 err_out_free_bus_2:
881 mdiobus_free(pdata->mii_bus);
882 err_out_1:
883 return err;
884 }
885
886 /* Gets the number of tx statuses in the fifo */
887 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
888 {
889 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
890 & TX_FIFO_INF_TSUSED_) >> 16;
891 }
892
893 /* Reads tx statuses and increments counters where necessary */
894 static void smsc911x_tx_update_txcounters(struct net_device *dev)
895 {
896 struct smsc911x_data *pdata = netdev_priv(dev);
897 unsigned int tx_stat;
898
899 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
900 if (unlikely(tx_stat & 0x80000000)) {
901 /* In this driver the packet tag is used as the packet
902 * length. Since a packet length can never reach the
903 * size of 0x8000, this bit is reserved. It is worth
904 * noting that the "reserved bit" in the warning above
905 * does not reference a hardware defined reserved bit
906 * but rather a driver defined one.
907 */
908 SMSC_WARNING(HW,
909 "Packet tag reserved bit is high");
910 } else {
911 if (unlikely(tx_stat & TX_STS_ES_)) {
912 dev->stats.tx_errors++;
913 } else {
914 dev->stats.tx_packets++;
915 dev->stats.tx_bytes += (tx_stat >> 16);
916 }
917 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
918 dev->stats.collisions += 16;
919 dev->stats.tx_aborted_errors += 1;
920 } else {
921 dev->stats.collisions +=
922 ((tx_stat >> 3) & 0xF);
923 }
924 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
925 dev->stats.tx_carrier_errors += 1;
926 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
927 dev->stats.collisions++;
928 dev->stats.tx_aborted_errors++;
929 }
930 }
931 }
932 }
933
934 /* Increments the Rx error counters */
935 static void
936 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
937 {
938 int crc_err = 0;
939
940 if (unlikely(rxstat & RX_STS_ES_)) {
941 dev->stats.rx_errors++;
942 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
943 dev->stats.rx_crc_errors++;
944 crc_err = 1;
945 }
946 }
947 if (likely(!crc_err)) {
948 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
949 (rxstat & RX_STS_LENGTH_ERR_)))
950 dev->stats.rx_length_errors++;
951 if (rxstat & RX_STS_MCAST_)
952 dev->stats.multicast++;
953 }
954 }
955
956 /* Quickly dumps bad packets */
957 static void
958 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes)
959 {
960 unsigned int pktwords = (pktbytes + NET_IP_ALIGN + 3) >> 2;
961
962 if (likely(pktwords >= 4)) {
963 unsigned int timeout = 500;
964 unsigned int val;
965 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
966 do {
967 udelay(1);
968 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
969 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
970
971 if (unlikely(timeout == 0))
972 SMSC_WARNING(HW, "Timed out waiting for "
973 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
974 } else {
975 unsigned int temp;
976 while (pktwords--)
977 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
978 }
979 }
980
981 /* NAPI poll function */
982 static int smsc911x_poll(struct napi_struct *napi, int budget)
983 {
984 struct smsc911x_data *pdata =
985 container_of(napi, struct smsc911x_data, napi);
986 struct net_device *dev = pdata->dev;
987 int npackets = 0;
988
989 while (npackets < budget) {
990 unsigned int pktlength;
991 unsigned int pktwords;
992 struct sk_buff *skb;
993 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
994
995 if (!rxstat) {
996 unsigned int temp;
997 /* We processed all packets available. Tell NAPI it can
998 * stop polling then re-enable rx interrupts */
999 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1000 napi_complete(napi);
1001 temp = smsc911x_reg_read(pdata, INT_EN);
1002 temp |= INT_EN_RSFL_EN_;
1003 smsc911x_reg_write(pdata, INT_EN, temp);
1004 break;
1005 }
1006
1007 /* Count packet for NAPI scheduling, even if it has an error.
1008 * Error packets still require cycles to discard */
1009 npackets++;
1010
1011 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1012 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1013 smsc911x_rx_counterrors(dev, rxstat);
1014
1015 if (unlikely(rxstat & RX_STS_ES_)) {
1016 SMSC_WARNING(RX_ERR,
1017 "Discarding packet with error bit set");
1018 /* Packet has an error, discard it and continue with
1019 * the next */
1020 smsc911x_rx_fastforward(pdata, pktwords);
1021 dev->stats.rx_dropped++;
1022 continue;
1023 }
1024
1025 skb = netdev_alloc_skb(dev, pktlength + NET_IP_ALIGN);
1026 if (unlikely(!skb)) {
1027 SMSC_WARNING(RX_ERR,
1028 "Unable to allocate skb for rx packet");
1029 /* Drop the packet and stop this polling iteration */
1030 smsc911x_rx_fastforward(pdata, pktwords);
1031 dev->stats.rx_dropped++;
1032 break;
1033 }
1034
1035 skb->data = skb->head;
1036 skb_reset_tail_pointer(skb);
1037
1038 /* Align IP on 16B boundary */
1039 skb_reserve(skb, NET_IP_ALIGN);
1040 skb_put(skb, pktlength - 4);
1041 smsc911x_rx_readfifo(pdata, (unsigned int *)skb->head,
1042 pktwords);
1043 skb->protocol = eth_type_trans(skb, dev);
1044 skb->ip_summed = CHECKSUM_NONE;
1045 netif_receive_skb(skb);
1046
1047 /* Update counters */
1048 dev->stats.rx_packets++;
1049 dev->stats.rx_bytes += (pktlength - 4);
1050 }
1051
1052 /* Return total received packets */
1053 return npackets;
1054 }
1055
1056 /* Returns hash bit number for given MAC address
1057 * Example:
1058 * 01 00 5E 00 00 01 -> returns bit number 31 */
1059 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1060 {
1061 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1062 }
1063
1064 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1065 {
1066 /* Performs the multicast & mac_cr update. This is called when
1067 * safe on the current hardware, and with the mac_lock held */
1068 unsigned int mac_cr;
1069
1070 SMSC_ASSERT_MAC_LOCK(pdata);
1071
1072 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1073 mac_cr |= pdata->set_bits_mask;
1074 mac_cr &= ~(pdata->clear_bits_mask);
1075 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1076 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1077 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1078 SMSC_TRACE(HW, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1079 mac_cr, pdata->hashhi, pdata->hashlo);
1080 }
1081
1082 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1083 {
1084 unsigned int mac_cr;
1085
1086 /* This function is only called for older LAN911x devices
1087 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1088 * be modified during Rx - newer devices immediately update the
1089 * registers.
1090 *
1091 * This is called from interrupt context */
1092
1093 spin_lock(&pdata->mac_lock);
1094
1095 /* Check Rx has stopped */
1096 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1097 SMSC_WARNING(DRV, "Rx not stopped");
1098
1099 /* Perform the update - safe to do now Rx has stopped */
1100 smsc911x_rx_multicast_update(pdata);
1101
1102 /* Re-enable Rx */
1103 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1104 mac_cr |= MAC_CR_RXEN_;
1105 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1106
1107 pdata->multicast_update_pending = 0;
1108
1109 spin_unlock(&pdata->mac_lock);
1110 }
1111
1112 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1113 {
1114 unsigned int timeout;
1115 unsigned int temp;
1116
1117 /* Reset the LAN911x */
1118 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1119 timeout = 10;
1120 do {
1121 udelay(10);
1122 temp = smsc911x_reg_read(pdata, HW_CFG);
1123 } while ((--timeout) && (temp & HW_CFG_SRST_));
1124
1125 if (unlikely(temp & HW_CFG_SRST_)) {
1126 SMSC_WARNING(DRV, "Failed to complete reset");
1127 return -EIO;
1128 }
1129 return 0;
1130 }
1131
1132 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1133 static void
1134 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1135 {
1136 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1137 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1138 (dev_addr[1] << 8) | dev_addr[0];
1139
1140 SMSC_ASSERT_MAC_LOCK(pdata);
1141
1142 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1143 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1144 }
1145
1146 static int smsc911x_open(struct net_device *dev)
1147 {
1148 struct smsc911x_data *pdata = netdev_priv(dev);
1149 unsigned int timeout;
1150 unsigned int temp;
1151 unsigned int intcfg;
1152
1153 /* if the phy is not yet registered, retry later*/
1154 if (!pdata->phy_dev) {
1155 SMSC_WARNING(HW, "phy_dev is NULL");
1156 return -EAGAIN;
1157 }
1158
1159 if (!is_valid_ether_addr(dev->dev_addr)) {
1160 SMSC_WARNING(HW, "dev_addr is not a valid MAC address");
1161 return -EADDRNOTAVAIL;
1162 }
1163
1164 /* Reset the LAN911x */
1165 if (smsc911x_soft_reset(pdata)) {
1166 SMSC_WARNING(HW, "soft reset failed");
1167 return -EIO;
1168 }
1169
1170 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1171 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1172
1173 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1174 timeout = 50;
1175 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1176 --timeout) {
1177 udelay(10);
1178 }
1179
1180 if (unlikely(timeout == 0))
1181 SMSC_WARNING(IFUP,
1182 "Timed out waiting for EEPROM busy bit to clear");
1183
1184 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1185
1186 /* The soft reset above cleared the device's MAC address,
1187 * restore it from local copy (set in probe) */
1188 spin_lock_irq(&pdata->mac_lock);
1189 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1190 spin_unlock_irq(&pdata->mac_lock);
1191
1192 /* Initialise irqs, but leave all sources disabled */
1193 smsc911x_reg_write(pdata, INT_EN, 0);
1194 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1195
1196 /* Set interrupt deassertion to 100uS */
1197 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1198
1199 if (pdata->config.irq_polarity) {
1200 SMSC_TRACE(IFUP, "irq polarity: active high");
1201 intcfg |= INT_CFG_IRQ_POL_;
1202 } else {
1203 SMSC_TRACE(IFUP, "irq polarity: active low");
1204 }
1205
1206 if (pdata->config.irq_type) {
1207 SMSC_TRACE(IFUP, "irq type: push-pull");
1208 intcfg |= INT_CFG_IRQ_TYPE_;
1209 } else {
1210 SMSC_TRACE(IFUP, "irq type: open drain");
1211 }
1212
1213 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1214
1215 SMSC_TRACE(IFUP, "Testing irq handler using IRQ %d", dev->irq);
1216 pdata->software_irq_signal = 0;
1217 smp_wmb();
1218
1219 temp = smsc911x_reg_read(pdata, INT_EN);
1220 temp |= INT_EN_SW_INT_EN_;
1221 smsc911x_reg_write(pdata, INT_EN, temp);
1222
1223 timeout = 1000;
1224 while (timeout--) {
1225 if (pdata->software_irq_signal)
1226 break;
1227 msleep(1);
1228 }
1229
1230 if (!pdata->software_irq_signal) {
1231 dev_warn(&dev->dev, "ISR failed signaling test (IRQ %d)\n",
1232 dev->irq);
1233 return -ENODEV;
1234 }
1235 SMSC_TRACE(IFUP, "IRQ handler passed test using IRQ %d", dev->irq);
1236
1237 dev_info(&dev->dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1238 (unsigned long)pdata->ioaddr, dev->irq);
1239
1240 /* Reset the last known duplex and carrier */
1241 pdata->last_duplex = -1;
1242 pdata->last_carrier = -1;
1243
1244 /* Bring the PHY up */
1245 phy_start(pdata->phy_dev);
1246
1247 temp = smsc911x_reg_read(pdata, HW_CFG);
1248 /* Preserve TX FIFO size and external PHY configuration */
1249 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1250 temp |= HW_CFG_SF_;
1251 smsc911x_reg_write(pdata, HW_CFG, temp);
1252
1253 temp = smsc911x_reg_read(pdata, FIFO_INT);
1254 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1255 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1256 smsc911x_reg_write(pdata, FIFO_INT, temp);
1257
1258 /* set RX Data offset to 2 bytes for alignment */
1259 smsc911x_reg_write(pdata, RX_CFG, (2 << 8));
1260
1261 /* enable NAPI polling before enabling RX interrupts */
1262 napi_enable(&pdata->napi);
1263
1264 temp = smsc911x_reg_read(pdata, INT_EN);
1265 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1266 smsc911x_reg_write(pdata, INT_EN, temp);
1267
1268 spin_lock_irq(&pdata->mac_lock);
1269 temp = smsc911x_mac_read(pdata, MAC_CR);
1270 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1271 smsc911x_mac_write(pdata, MAC_CR, temp);
1272 spin_unlock_irq(&pdata->mac_lock);
1273
1274 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1275
1276 netif_start_queue(dev);
1277 return 0;
1278 }
1279
1280 /* Entry point for stopping the interface */
1281 static int smsc911x_stop(struct net_device *dev)
1282 {
1283 struct smsc911x_data *pdata = netdev_priv(dev);
1284 unsigned int temp;
1285
1286 /* Disable all device interrupts */
1287 temp = smsc911x_reg_read(pdata, INT_CFG);
1288 temp &= ~INT_CFG_IRQ_EN_;
1289 smsc911x_reg_write(pdata, INT_CFG, temp);
1290
1291 /* Stop Tx and Rx polling */
1292 netif_stop_queue(dev);
1293 napi_disable(&pdata->napi);
1294
1295 /* At this point all Rx and Tx activity is stopped */
1296 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1297 smsc911x_tx_update_txcounters(dev);
1298
1299 /* Bring the PHY down */
1300 if (pdata->phy_dev)
1301 phy_stop(pdata->phy_dev);
1302
1303 SMSC_TRACE(IFDOWN, "Interface stopped");
1304 return 0;
1305 }
1306
1307 /* Entry point for transmitting a packet */
1308 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1309 {
1310 struct smsc911x_data *pdata = netdev_priv(dev);
1311 unsigned int freespace;
1312 unsigned int tx_cmd_a;
1313 unsigned int tx_cmd_b;
1314 unsigned int temp;
1315 u32 wrsz;
1316 ulong bufp;
1317
1318 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1319
1320 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1321 SMSC_WARNING(TX_ERR,
1322 "Tx data fifo low, space available: %d", freespace);
1323
1324 /* Word alignment adjustment */
1325 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1326 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1327 tx_cmd_a |= (unsigned int)skb->len;
1328
1329 tx_cmd_b = ((unsigned int)skb->len) << 16;
1330 tx_cmd_b |= (unsigned int)skb->len;
1331
1332 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1333 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1334
1335 bufp = (ulong)skb->data & (~0x3);
1336 wrsz = (u32)skb->len + 3;
1337 wrsz += (u32)((ulong)skb->data & 0x3);
1338 wrsz >>= 2;
1339
1340 smsc911x_tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1341 freespace -= (skb->len + 32);
1342 dev_kfree_skb(skb);
1343 dev->trans_start = jiffies;
1344
1345 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1346 smsc911x_tx_update_txcounters(dev);
1347
1348 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1349 netif_stop_queue(dev);
1350 temp = smsc911x_reg_read(pdata, FIFO_INT);
1351 temp &= 0x00FFFFFF;
1352 temp |= 0x32000000;
1353 smsc911x_reg_write(pdata, FIFO_INT, temp);
1354 }
1355
1356 return NETDEV_TX_OK;
1357 }
1358
1359 /* Entry point for getting status counters */
1360 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1361 {
1362 struct smsc911x_data *pdata = netdev_priv(dev);
1363 smsc911x_tx_update_txcounters(dev);
1364 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1365 return &dev->stats;
1366 }
1367
1368 /* Entry point for setting addressing modes */
1369 static void smsc911x_set_multicast_list(struct net_device *dev)
1370 {
1371 struct smsc911x_data *pdata = netdev_priv(dev);
1372 unsigned long flags;
1373
1374 if (dev->flags & IFF_PROMISC) {
1375 /* Enabling promiscuous mode */
1376 pdata->set_bits_mask = MAC_CR_PRMS_;
1377 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1378 pdata->hashhi = 0;
1379 pdata->hashlo = 0;
1380 } else if (dev->flags & IFF_ALLMULTI) {
1381 /* Enabling all multicast mode */
1382 pdata->set_bits_mask = MAC_CR_MCPAS_;
1383 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1384 pdata->hashhi = 0;
1385 pdata->hashlo = 0;
1386 } else if (dev->mc_count > 0) {
1387 /* Enabling specific multicast addresses */
1388 unsigned int hash_high = 0;
1389 unsigned int hash_low = 0;
1390 unsigned int count = 0;
1391 struct dev_mc_list *mc_list = dev->mc_list;
1392
1393 pdata->set_bits_mask = MAC_CR_HPFILT_;
1394 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1395
1396 while (mc_list) {
1397 count++;
1398 if ((mc_list->dmi_addrlen) == ETH_ALEN) {
1399 unsigned int bitnum =
1400 smsc911x_hash(mc_list->dmi_addr);
1401 unsigned int mask = 0x01 << (bitnum & 0x1F);
1402 if (bitnum & 0x20)
1403 hash_high |= mask;
1404 else
1405 hash_low |= mask;
1406 } else {
1407 SMSC_WARNING(DRV, "dmi_addrlen != 6");
1408 }
1409 mc_list = mc_list->next;
1410 }
1411 if (count != (unsigned int)dev->mc_count)
1412 SMSC_WARNING(DRV, "mc_count != dev->mc_count");
1413
1414 pdata->hashhi = hash_high;
1415 pdata->hashlo = hash_low;
1416 } else {
1417 /* Enabling local MAC address only */
1418 pdata->set_bits_mask = 0;
1419 pdata->clear_bits_mask =
1420 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1421 pdata->hashhi = 0;
1422 pdata->hashlo = 0;
1423 }
1424
1425 spin_lock_irqsave(&pdata->mac_lock, flags);
1426
1427 if (pdata->generation <= 1) {
1428 /* Older hardware revision - cannot change these flags while
1429 * receiving data */
1430 if (!pdata->multicast_update_pending) {
1431 unsigned int temp;
1432 SMSC_TRACE(HW, "scheduling mcast update");
1433 pdata->multicast_update_pending = 1;
1434
1435 /* Request the hardware to stop, then perform the
1436 * update when we get an RX_STOP interrupt */
1437 temp = smsc911x_mac_read(pdata, MAC_CR);
1438 temp &= ~(MAC_CR_RXEN_);
1439 smsc911x_mac_write(pdata, MAC_CR, temp);
1440 } else {
1441 /* There is another update pending, this should now
1442 * use the newer values */
1443 }
1444 } else {
1445 /* Newer hardware revision - can write immediately */
1446 smsc911x_rx_multicast_update(pdata);
1447 }
1448
1449 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1450 }
1451
1452 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1453 {
1454 struct net_device *dev = dev_id;
1455 struct smsc911x_data *pdata = netdev_priv(dev);
1456 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1457 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1458 int serviced = IRQ_NONE;
1459 u32 temp;
1460
1461 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1462 temp = smsc911x_reg_read(pdata, INT_EN);
1463 temp &= (~INT_EN_SW_INT_EN_);
1464 smsc911x_reg_write(pdata, INT_EN, temp);
1465 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1466 pdata->software_irq_signal = 1;
1467 smp_wmb();
1468 serviced = IRQ_HANDLED;
1469 }
1470
1471 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1472 /* Called when there is a multicast update scheduled and
1473 * it is now safe to complete the update */
1474 SMSC_TRACE(INTR, "RX Stop interrupt");
1475 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1476 if (pdata->multicast_update_pending)
1477 smsc911x_rx_multicast_update_workaround(pdata);
1478 serviced = IRQ_HANDLED;
1479 }
1480
1481 if (intsts & inten & INT_STS_TDFA_) {
1482 temp = smsc911x_reg_read(pdata, FIFO_INT);
1483 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1484 smsc911x_reg_write(pdata, FIFO_INT, temp);
1485 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1486 netif_wake_queue(dev);
1487 serviced = IRQ_HANDLED;
1488 }
1489
1490 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1491 SMSC_TRACE(INTR, "RX Error interrupt");
1492 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1493 serviced = IRQ_HANDLED;
1494 }
1495
1496 if (likely(intsts & inten & INT_STS_RSFL_)) {
1497 if (likely(napi_schedule_prep(&pdata->napi))) {
1498 /* Disable Rx interrupts */
1499 temp = smsc911x_reg_read(pdata, INT_EN);
1500 temp &= (~INT_EN_RSFL_EN_);
1501 smsc911x_reg_write(pdata, INT_EN, temp);
1502 /* Schedule a NAPI poll */
1503 __napi_schedule(&pdata->napi);
1504 } else {
1505 SMSC_WARNING(RX_ERR,
1506 "napi_schedule_prep failed");
1507 }
1508 serviced = IRQ_HANDLED;
1509 }
1510
1511 return serviced;
1512 }
1513
1514 #ifdef CONFIG_NET_POLL_CONTROLLER
1515 static void smsc911x_poll_controller(struct net_device *dev)
1516 {
1517 disable_irq(dev->irq);
1518 smsc911x_irqhandler(0, dev);
1519 enable_irq(dev->irq);
1520 }
1521 #endif /* CONFIG_NET_POLL_CONTROLLER */
1522
1523 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1524 {
1525 struct smsc911x_data *pdata = netdev_priv(dev);
1526 struct sockaddr *addr = p;
1527
1528 /* On older hardware revisions we cannot change the mac address
1529 * registers while receiving data. Newer devices can safely change
1530 * this at any time. */
1531 if (pdata->generation <= 1 && netif_running(dev))
1532 return -EBUSY;
1533
1534 if (!is_valid_ether_addr(addr->sa_data))
1535 return -EADDRNOTAVAIL;
1536
1537 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1538
1539 spin_lock_irq(&pdata->mac_lock);
1540 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1541 spin_unlock_irq(&pdata->mac_lock);
1542
1543 dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr);
1544
1545 return 0;
1546 }
1547
1548 /* Standard ioctls for mii-tool */
1549 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1550 {
1551 struct smsc911x_data *pdata = netdev_priv(dev);
1552
1553 if (!netif_running(dev) || !pdata->phy_dev)
1554 return -EINVAL;
1555
1556 return phy_mii_ioctl(pdata->phy_dev, if_mii(ifr), cmd);
1557 }
1558
1559 static int
1560 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1561 {
1562 struct smsc911x_data *pdata = netdev_priv(dev);
1563
1564 cmd->maxtxpkt = 1;
1565 cmd->maxrxpkt = 1;
1566 return phy_ethtool_gset(pdata->phy_dev, cmd);
1567 }
1568
1569 static int
1570 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1571 {
1572 struct smsc911x_data *pdata = netdev_priv(dev);
1573
1574 return phy_ethtool_sset(pdata->phy_dev, cmd);
1575 }
1576
1577 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1578 struct ethtool_drvinfo *info)
1579 {
1580 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1581 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1582 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1583 sizeof(info->bus_info));
1584 }
1585
1586 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1587 {
1588 struct smsc911x_data *pdata = netdev_priv(dev);
1589
1590 return phy_start_aneg(pdata->phy_dev);
1591 }
1592
1593 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1594 {
1595 struct smsc911x_data *pdata = netdev_priv(dev);
1596 return pdata->msg_enable;
1597 }
1598
1599 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1600 {
1601 struct smsc911x_data *pdata = netdev_priv(dev);
1602 pdata->msg_enable = level;
1603 }
1604
1605 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1606 {
1607 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1608 sizeof(u32);
1609 }
1610
1611 static void
1612 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1613 void *buf)
1614 {
1615 struct smsc911x_data *pdata = netdev_priv(dev);
1616 struct phy_device *phy_dev = pdata->phy_dev;
1617 unsigned long flags;
1618 unsigned int i;
1619 unsigned int j = 0;
1620 u32 *data = buf;
1621
1622 regs->version = pdata->idrev;
1623 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1624 data[j++] = smsc911x_reg_read(pdata, i);
1625
1626 for (i = MAC_CR; i <= WUCSR; i++) {
1627 spin_lock_irqsave(&pdata->mac_lock, flags);
1628 data[j++] = smsc911x_mac_read(pdata, i);
1629 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1630 }
1631
1632 for (i = 0; i <= 31; i++)
1633 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
1634 }
1635
1636 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
1637 {
1638 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
1639 temp &= ~GPIO_CFG_EEPR_EN_;
1640 smsc911x_reg_write(pdata, GPIO_CFG, temp);
1641 msleep(1);
1642 }
1643
1644 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
1645 {
1646 int timeout = 100;
1647 u32 e2cmd;
1648
1649 SMSC_TRACE(DRV, "op 0x%08x", op);
1650 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
1651 SMSC_WARNING(DRV, "Busy at start");
1652 return -EBUSY;
1653 }
1654
1655 e2cmd = op | E2P_CMD_EPC_BUSY_;
1656 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
1657
1658 do {
1659 msleep(1);
1660 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
1661 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
1662
1663 if (!timeout) {
1664 SMSC_TRACE(DRV, "TIMED OUT");
1665 return -EAGAIN;
1666 }
1667
1668 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
1669 SMSC_TRACE(DRV, "Error occured during eeprom operation");
1670 return -EINVAL;
1671 }
1672
1673 return 0;
1674 }
1675
1676 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
1677 u8 address, u8 *data)
1678 {
1679 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
1680 int ret;
1681
1682 SMSC_TRACE(DRV, "address 0x%x", address);
1683 ret = smsc911x_eeprom_send_cmd(pdata, op);
1684
1685 if (!ret)
1686 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
1687
1688 return ret;
1689 }
1690
1691 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
1692 u8 address, u8 data)
1693 {
1694 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
1695 u32 temp;
1696 int ret;
1697
1698 SMSC_TRACE(DRV, "address 0x%x, data 0x%x", address, data);
1699 ret = smsc911x_eeprom_send_cmd(pdata, op);
1700
1701 if (!ret) {
1702 op = E2P_CMD_EPC_CMD_WRITE_ | address;
1703 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
1704
1705 /* Workaround for hardware read-after-write restriction */
1706 temp = smsc911x_reg_read(pdata, BYTE_TEST);
1707
1708 ret = smsc911x_eeprom_send_cmd(pdata, op);
1709 }
1710
1711 return ret;
1712 }
1713
1714 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
1715 {
1716 return SMSC911X_EEPROM_SIZE;
1717 }
1718
1719 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
1720 struct ethtool_eeprom *eeprom, u8 *data)
1721 {
1722 struct smsc911x_data *pdata = netdev_priv(dev);
1723 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
1724 int len;
1725 int i;
1726
1727 smsc911x_eeprom_enable_access(pdata);
1728
1729 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
1730 for (i = 0; i < len; i++) {
1731 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
1732 if (ret < 0) {
1733 eeprom->len = 0;
1734 return ret;
1735 }
1736 }
1737
1738 memcpy(data, &eeprom_data[eeprom->offset], len);
1739 eeprom->len = len;
1740 return 0;
1741 }
1742
1743 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
1744 struct ethtool_eeprom *eeprom, u8 *data)
1745 {
1746 int ret;
1747 struct smsc911x_data *pdata = netdev_priv(dev);
1748
1749 smsc911x_eeprom_enable_access(pdata);
1750 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
1751 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
1752 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
1753
1754 /* Single byte write, according to man page */
1755 eeprom->len = 1;
1756
1757 return ret;
1758 }
1759
1760 static const struct ethtool_ops smsc911x_ethtool_ops = {
1761 .get_settings = smsc911x_ethtool_getsettings,
1762 .set_settings = smsc911x_ethtool_setsettings,
1763 .get_link = ethtool_op_get_link,
1764 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
1765 .nway_reset = smsc911x_ethtool_nwayreset,
1766 .get_msglevel = smsc911x_ethtool_getmsglevel,
1767 .set_msglevel = smsc911x_ethtool_setmsglevel,
1768 .get_regs_len = smsc911x_ethtool_getregslen,
1769 .get_regs = smsc911x_ethtool_getregs,
1770 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
1771 .get_eeprom = smsc911x_ethtool_get_eeprom,
1772 .set_eeprom = smsc911x_ethtool_set_eeprom,
1773 };
1774
1775 static const struct net_device_ops smsc911x_netdev_ops = {
1776 .ndo_open = smsc911x_open,
1777 .ndo_stop = smsc911x_stop,
1778 .ndo_start_xmit = smsc911x_hard_start_xmit,
1779 .ndo_get_stats = smsc911x_get_stats,
1780 .ndo_set_multicast_list = smsc911x_set_multicast_list,
1781 .ndo_do_ioctl = smsc911x_do_ioctl,
1782 .ndo_change_mtu = eth_change_mtu,
1783 .ndo_validate_addr = eth_validate_addr,
1784 .ndo_set_mac_address = smsc911x_set_mac_address,
1785 #ifdef CONFIG_NET_POLL_CONTROLLER
1786 .ndo_poll_controller = smsc911x_poll_controller,
1787 #endif
1788 };
1789
1790 /* copies the current mac address from hardware to dev->dev_addr */
1791 static void __devinit smsc911x_read_mac_address(struct net_device *dev)
1792 {
1793 struct smsc911x_data *pdata = netdev_priv(dev);
1794 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
1795 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
1796
1797 dev->dev_addr[0] = (u8)(mac_low32);
1798 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
1799 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
1800 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
1801 dev->dev_addr[4] = (u8)(mac_high16);
1802 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
1803 }
1804
1805 /* Initializing private device structures, only called from probe */
1806 static int __devinit smsc911x_init(struct net_device *dev)
1807 {
1808 struct smsc911x_data *pdata = netdev_priv(dev);
1809 unsigned int byte_test;
1810
1811 SMSC_TRACE(PROBE, "Driver Parameters:");
1812 SMSC_TRACE(PROBE, "LAN base: 0x%08lX",
1813 (unsigned long)pdata->ioaddr);
1814 SMSC_TRACE(PROBE, "IRQ: %d", dev->irq);
1815 SMSC_TRACE(PROBE, "PHY will be autodetected.");
1816
1817 spin_lock_init(&pdata->dev_lock);
1818
1819 if (pdata->ioaddr == 0) {
1820 SMSC_WARNING(PROBE, "pdata->ioaddr: 0x00000000");
1821 return -ENODEV;
1822 }
1823
1824 /* Check byte ordering */
1825 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1826 SMSC_TRACE(PROBE, "BYTE_TEST: 0x%08X", byte_test);
1827 if (byte_test == 0x43218765) {
1828 SMSC_TRACE(PROBE, "BYTE_TEST looks swapped, "
1829 "applying WORD_SWAP");
1830 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
1831
1832 /* 1 dummy read of BYTE_TEST is needed after a write to
1833 * WORD_SWAP before its contents are valid */
1834 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1835
1836 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
1837 }
1838
1839 if (byte_test != 0x87654321) {
1840 SMSC_WARNING(DRV, "BYTE_TEST: 0x%08X", byte_test);
1841 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
1842 SMSC_WARNING(PROBE,
1843 "top 16 bits equal to bottom 16 bits");
1844 SMSC_TRACE(PROBE, "This may mean the chip is set "
1845 "for 32 bit while the bus is reading 16 bit");
1846 }
1847 return -ENODEV;
1848 }
1849
1850 /* Default generation to zero (all workarounds apply) */
1851 pdata->generation = 0;
1852
1853 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
1854 switch (pdata->idrev & 0xFFFF0000) {
1855 case 0x01180000:
1856 case 0x01170000:
1857 case 0x01160000:
1858 case 0x01150000:
1859 /* LAN911[5678] family */
1860 pdata->generation = pdata->idrev & 0x0000FFFF;
1861 break;
1862
1863 case 0x118A0000:
1864 case 0x117A0000:
1865 case 0x116A0000:
1866 case 0x115A0000:
1867 /* LAN921[5678] family */
1868 pdata->generation = 3;
1869 break;
1870
1871 case 0x92100000:
1872 case 0x92110000:
1873 case 0x92200000:
1874 case 0x92210000:
1875 /* LAN9210/LAN9211/LAN9220/LAN9221 */
1876 pdata->generation = 4;
1877 break;
1878
1879 default:
1880 SMSC_WARNING(PROBE, "LAN911x not identified, idrev: 0x%08X",
1881 pdata->idrev);
1882 return -ENODEV;
1883 }
1884
1885 SMSC_TRACE(PROBE, "LAN911x identified, idrev: 0x%08X, generation: %d",
1886 pdata->idrev, pdata->generation);
1887
1888 if (pdata->generation == 0)
1889 SMSC_WARNING(PROBE,
1890 "This driver is not intended for this chip revision");
1891
1892 /* workaround for platforms without an eeprom, where the mac address
1893 * is stored elsewhere and set by the bootloader. This saves the
1894 * mac address before resetting the device */
1895 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS)
1896 smsc911x_read_mac_address(dev);
1897
1898 /* Reset the LAN911x */
1899 if (smsc911x_soft_reset(pdata))
1900 return -ENODEV;
1901
1902 /* Disable all interrupt sources until we bring the device up */
1903 smsc911x_reg_write(pdata, INT_EN, 0);
1904
1905 ether_setup(dev);
1906 dev->flags |= IFF_MULTICAST;
1907 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
1908 dev->netdev_ops = &smsc911x_netdev_ops;
1909 dev->ethtool_ops = &smsc911x_ethtool_ops;
1910
1911 return 0;
1912 }
1913
1914 static int __devexit smsc911x_drv_remove(struct platform_device *pdev)
1915 {
1916 struct net_device *dev;
1917 struct smsc911x_data *pdata;
1918 struct resource *res;
1919
1920 dev = platform_get_drvdata(pdev);
1921 BUG_ON(!dev);
1922 pdata = netdev_priv(dev);
1923 BUG_ON(!pdata);
1924 BUG_ON(!pdata->ioaddr);
1925 BUG_ON(!pdata->phy_dev);
1926
1927 SMSC_TRACE(IFDOWN, "Stopping driver.");
1928
1929 phy_disconnect(pdata->phy_dev);
1930 pdata->phy_dev = NULL;
1931 mdiobus_unregister(pdata->mii_bus);
1932 mdiobus_free(pdata->mii_bus);
1933
1934 platform_set_drvdata(pdev, NULL);
1935 unregister_netdev(dev);
1936 free_irq(dev->irq, dev);
1937 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1938 "smsc911x-memory");
1939 if (!res)
1940 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1941
1942 release_mem_region(res->start, resource_size(res));
1943
1944 iounmap(pdata->ioaddr);
1945
1946 free_netdev(dev);
1947
1948 return 0;
1949 }
1950
1951 static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
1952 {
1953 struct net_device *dev;
1954 struct smsc911x_data *pdata;
1955 struct smsc911x_platform_config *config = pdev->dev.platform_data;
1956 struct resource *res, *irq_res;
1957 unsigned int intcfg = 0;
1958 int res_size, irq_flags;
1959 int retval;
1960
1961 pr_info("%s: Driver version %s.\n", SMSC_CHIPNAME, SMSC_DRV_VERSION);
1962
1963 /* platform data specifies irq & dynamic bus configuration */
1964 if (!pdev->dev.platform_data) {
1965 pr_warning("%s: platform_data not provided\n", SMSC_CHIPNAME);
1966 retval = -ENODEV;
1967 goto out_0;
1968 }
1969
1970 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1971 "smsc911x-memory");
1972 if (!res)
1973 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1974 if (!res) {
1975 pr_warning("%s: Could not allocate resource.\n",
1976 SMSC_CHIPNAME);
1977 retval = -ENODEV;
1978 goto out_0;
1979 }
1980 res_size = resource_size(res);
1981
1982 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1983 if (!irq_res) {
1984 pr_warning("%s: Could not allocate irq resource.\n",
1985 SMSC_CHIPNAME);
1986 retval = -ENODEV;
1987 goto out_0;
1988 }
1989
1990 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
1991 retval = -EBUSY;
1992 goto out_0;
1993 }
1994
1995 dev = alloc_etherdev(sizeof(struct smsc911x_data));
1996 if (!dev) {
1997 pr_warning("%s: Could not allocate device.\n", SMSC_CHIPNAME);
1998 retval = -ENOMEM;
1999 goto out_release_io_1;
2000 }
2001
2002 SET_NETDEV_DEV(dev, &pdev->dev);
2003
2004 pdata = netdev_priv(dev);
2005
2006 dev->irq = irq_res->start;
2007 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
2008 pdata->ioaddr = ioremap_nocache(res->start, res_size);
2009
2010 /* copy config parameters across to pdata */
2011 memcpy(&pdata->config, config, sizeof(pdata->config));
2012
2013 pdata->dev = dev;
2014 pdata->msg_enable = ((1 << debug) - 1);
2015
2016 if (pdata->ioaddr == NULL) {
2017 SMSC_WARNING(PROBE,
2018 "Error smsc911x base address invalid");
2019 retval = -ENOMEM;
2020 goto out_free_netdev_2;
2021 }
2022
2023 retval = smsc911x_init(dev);
2024 if (retval < 0)
2025 goto out_unmap_io_3;
2026
2027 /* configure irq polarity and type before connecting isr */
2028 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
2029 intcfg |= INT_CFG_IRQ_POL_;
2030
2031 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
2032 intcfg |= INT_CFG_IRQ_TYPE_;
2033
2034 smsc911x_reg_write(pdata, INT_CFG, intcfg);
2035
2036 /* Ensure interrupts are globally disabled before connecting ISR */
2037 smsc911x_reg_write(pdata, INT_EN, 0);
2038 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
2039
2040 retval = request_irq(dev->irq, smsc911x_irqhandler,
2041 irq_flags | IRQF_SHARED, dev->name, dev);
2042 if (retval) {
2043 SMSC_WARNING(PROBE,
2044 "Unable to claim requested irq: %d", dev->irq);
2045 goto out_unmap_io_3;
2046 }
2047
2048 platform_set_drvdata(pdev, dev);
2049
2050 retval = register_netdev(dev);
2051 if (retval) {
2052 SMSC_WARNING(PROBE,
2053 "Error %i registering device", retval);
2054 goto out_unset_drvdata_4;
2055 } else {
2056 SMSC_TRACE(PROBE, "Network interface: \"%s\"", dev->name);
2057 }
2058
2059 spin_lock_init(&pdata->mac_lock);
2060
2061 retval = smsc911x_mii_init(pdev, dev);
2062 if (retval) {
2063 SMSC_WARNING(PROBE,
2064 "Error %i initialising mii", retval);
2065 goto out_unregister_netdev_5;
2066 }
2067
2068 spin_lock_irq(&pdata->mac_lock);
2069
2070 /* Check if mac address has been specified when bringing interface up */
2071 if (is_valid_ether_addr(dev->dev_addr)) {
2072 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2073 SMSC_TRACE(PROBE, "MAC Address is specified by configuration");
2074 } else if (is_valid_ether_addr(pdata->config.mac)) {
2075 memcpy(dev->dev_addr, pdata->config.mac, 6);
2076 SMSC_TRACE(PROBE, "MAC Address specified by platform data");
2077 } else {
2078 /* Try reading mac address from device. if EEPROM is present
2079 * it will already have been set */
2080 smsc911x_read_mac_address(dev);
2081
2082 if (is_valid_ether_addr(dev->dev_addr)) {
2083 /* eeprom values are valid so use them */
2084 SMSC_TRACE(PROBE,
2085 "Mac Address is read from LAN911x EEPROM");
2086 } else {
2087 /* eeprom values are invalid, generate random MAC */
2088 random_ether_addr(dev->dev_addr);
2089 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2090 SMSC_TRACE(PROBE,
2091 "MAC Address is set to random_ether_addr");
2092 }
2093 }
2094
2095 spin_unlock_irq(&pdata->mac_lock);
2096
2097 dev_info(&dev->dev, "MAC Address: %pM\n", dev->dev_addr);
2098
2099 return 0;
2100
2101 out_unregister_netdev_5:
2102 unregister_netdev(dev);
2103 out_unset_drvdata_4:
2104 platform_set_drvdata(pdev, NULL);
2105 free_irq(dev->irq, dev);
2106 out_unmap_io_3:
2107 iounmap(pdata->ioaddr);
2108 out_free_netdev_2:
2109 free_netdev(dev);
2110 out_release_io_1:
2111 release_mem_region(res->start, resource_size(res));
2112 out_0:
2113 return retval;
2114 }
2115
2116 #ifdef CONFIG_PM
2117 /* This implementation assumes the devices remains powered on its VDDVARIO
2118 * pins during suspend. */
2119
2120 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2121
2122 static int smsc911x_suspend(struct device *dev)
2123 {
2124 struct net_device *ndev = dev_get_drvdata(dev);
2125 struct smsc911x_data *pdata = netdev_priv(ndev);
2126
2127 /* enable wake on LAN, energy detection and the external PME
2128 * signal. */
2129 smsc911x_reg_write(pdata, PMT_CTRL,
2130 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2131 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2132
2133 return 0;
2134 }
2135
2136 static int smsc911x_resume(struct device *dev)
2137 {
2138 struct net_device *ndev = dev_get_drvdata(dev);
2139 struct smsc911x_data *pdata = netdev_priv(ndev);
2140 unsigned int to = 100;
2141
2142 /* Note 3.11 from the datasheet:
2143 * "When the LAN9220 is in a power saving state, a write of any
2144 * data to the BYTE_TEST register will wake-up the device."
2145 */
2146 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2147
2148 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2149 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2150 * if it failed. */
2151 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2152 udelay(1000);
2153
2154 return (to == 0) ? -EIO : 0;
2155 }
2156
2157 static const struct dev_pm_ops smsc911x_pm_ops = {
2158 .suspend = smsc911x_suspend,
2159 .resume = smsc911x_resume,
2160 };
2161
2162 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2163
2164 #else
2165 #define SMSC911X_PM_OPS NULL
2166 #endif
2167
2168 static struct platform_driver smsc911x_driver = {
2169 .probe = smsc911x_drv_probe,
2170 .remove = __devexit_p(smsc911x_drv_remove),
2171 .driver = {
2172 .name = SMSC_CHIPNAME,
2173 .owner = THIS_MODULE,
2174 .pm = SMSC911X_PM_OPS,
2175 },
2176 };
2177
2178 /* Entry point for loading the module */
2179 static int __init smsc911x_init_module(void)
2180 {
2181 return platform_driver_register(&smsc911x_driver);
2182 }
2183
2184 /* entry point for unloading the module */
2185 static void __exit smsc911x_cleanup_module(void)
2186 {
2187 platform_driver_unregister(&smsc911x_driver);
2188 }
2189
2190 module_init(smsc911x_init_module);
2191 module_exit(smsc911x_cleanup_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree