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Merge tag 'master-2014-11-25' of git://git.kernel.org/pub/scm/linux/kernel/git/linvil...
[deliverable/linux.git] / drivers / net / ethernet / smsc / smsc911x.c
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, see <http://www.gnu.org/licenses/>.
18 *
19 ***************************************************************************
20 * Rewritten, heavily based on smsc911x simple driver by SMSC.
21 * Partly uses io macros from smc91x.c by Nicolas Pitre
22 *
23 * Supported devices:
24 * LAN9115, LAN9116, LAN9117, LAN9118
25 * LAN9215, LAN9216, LAN9217, LAN9218
26 * LAN9210, LAN9211
27 * LAN9220, LAN9221
28 * LAN89218
29 *
30 */
31
32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33
34 #include <linux/crc32.h>
35 #include <linux/clk.h>
36 #include <linux/delay.h>
37 #include <linux/errno.h>
38 #include <linux/etherdevice.h>
39 #include <linux/ethtool.h>
40 #include <linux/init.h>
41 #include <linux/interrupt.h>
42 #include <linux/ioport.h>
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/netdevice.h>
46 #include <linux/platform_device.h>
47 #include <linux/regulator/consumer.h>
48 #include <linux/sched.h>
49 #include <linux/timer.h>
50 #include <linux/bug.h>
51 #include <linux/bitops.h>
52 #include <linux/irq.h>
53 #include <linux/io.h>
54 #include <linux/swab.h>
55 #include <linux/phy.h>
56 #include <linux/smsc911x.h>
57 #include <linux/device.h>
58 #include <linux/of.h>
59 #include <linux/of_device.h>
60 #include <linux/of_gpio.h>
61 #include <linux/of_net.h>
62 #include "smsc911x.h"
63
64 #define SMSC_CHIPNAME "smsc911x"
65 #define SMSC_MDIONAME "smsc911x-mdio"
66 #define SMSC_DRV_VERSION "2008-10-21"
67
68 MODULE_LICENSE("GPL");
69 MODULE_VERSION(SMSC_DRV_VERSION);
70 MODULE_ALIAS("platform:smsc911x");
71
72 #if USE_DEBUG > 0
73 static int debug = 16;
74 #else
75 static int debug = 3;
76 #endif
77
78 module_param(debug, int, 0);
79 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
80
81 struct smsc911x_data;
82
83 struct smsc911x_ops {
84 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
85 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
86 void (*rx_readfifo)(struct smsc911x_data *pdata,
87 unsigned int *buf, unsigned int wordcount);
88 void (*tx_writefifo)(struct smsc911x_data *pdata,
89 unsigned int *buf, unsigned int wordcount);
90 };
91
92 #define SMSC911X_NUM_SUPPLIES 2
93
94 struct smsc911x_data {
95 void __iomem *ioaddr;
96
97 unsigned int idrev;
98
99 /* used to decide which workarounds apply */
100 unsigned int generation;
101
102 /* device configuration (copied from platform_data during probe) */
103 struct smsc911x_platform_config config;
104
105 /* This needs to be acquired before calling any of below:
106 * smsc911x_mac_read(), smsc911x_mac_write()
107 */
108 spinlock_t mac_lock;
109
110 /* spinlock to ensure register accesses are serialised */
111 spinlock_t dev_lock;
112
113 struct phy_device *phy_dev;
114 struct mii_bus *mii_bus;
115 int phy_irq[PHY_MAX_ADDR];
116 unsigned int using_extphy;
117 int last_duplex;
118 int last_carrier;
119
120 u32 msg_enable;
121 unsigned int gpio_setting;
122 unsigned int gpio_orig_setting;
123 struct net_device *dev;
124 struct napi_struct napi;
125
126 unsigned int software_irq_signal;
127
128 #ifdef USE_PHY_WORK_AROUND
129 #define MIN_PACKET_SIZE (64)
130 char loopback_tx_pkt[MIN_PACKET_SIZE];
131 char loopback_rx_pkt[MIN_PACKET_SIZE];
132 unsigned int resetcount;
133 #endif
134
135 /* Members for Multicast filter workaround */
136 unsigned int multicast_update_pending;
137 unsigned int set_bits_mask;
138 unsigned int clear_bits_mask;
139 unsigned int hashhi;
140 unsigned int hashlo;
141
142 /* register access functions */
143 const struct smsc911x_ops *ops;
144
145 /* regulators */
146 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
147
148 /* clock */
149 struct clk *clk;
150 };
151
152 /* Easy access to information */
153 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
154
155 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
156 {
157 if (pdata->config.flags & SMSC911X_USE_32BIT)
158 return readl(pdata->ioaddr + reg);
159
160 if (pdata->config.flags & SMSC911X_USE_16BIT)
161 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
162 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
163
164 BUG();
165 return 0;
166 }
167
168 static inline u32
169 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
170 {
171 if (pdata->config.flags & SMSC911X_USE_32BIT)
172 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
173
174 if (pdata->config.flags & SMSC911X_USE_16BIT)
175 return (readw(pdata->ioaddr +
176 __smsc_shift(pdata, reg)) & 0xFFFF) |
177 ((readw(pdata->ioaddr +
178 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
179
180 BUG();
181 return 0;
182 }
183
184 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
185 {
186 u32 data;
187 unsigned long flags;
188
189 spin_lock_irqsave(&pdata->dev_lock, flags);
190 data = pdata->ops->reg_read(pdata, reg);
191 spin_unlock_irqrestore(&pdata->dev_lock, flags);
192
193 return data;
194 }
195
196 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
197 u32 val)
198 {
199 if (pdata->config.flags & SMSC911X_USE_32BIT) {
200 writel(val, pdata->ioaddr + reg);
201 return;
202 }
203
204 if (pdata->config.flags & SMSC911X_USE_16BIT) {
205 writew(val & 0xFFFF, pdata->ioaddr + reg);
206 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
207 return;
208 }
209
210 BUG();
211 }
212
213 static inline void
214 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
215 {
216 if (pdata->config.flags & SMSC911X_USE_32BIT) {
217 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
218 return;
219 }
220
221 if (pdata->config.flags & SMSC911X_USE_16BIT) {
222 writew(val & 0xFFFF,
223 pdata->ioaddr + __smsc_shift(pdata, reg));
224 writew((val >> 16) & 0xFFFF,
225 pdata->ioaddr + __smsc_shift(pdata, reg + 2));
226 return;
227 }
228
229 BUG();
230 }
231
232 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
233 u32 val)
234 {
235 unsigned long flags;
236
237 spin_lock_irqsave(&pdata->dev_lock, flags);
238 pdata->ops->reg_write(pdata, reg, val);
239 spin_unlock_irqrestore(&pdata->dev_lock, flags);
240 }
241
242 /* Writes a packet to the TX_DATA_FIFO */
243 static inline void
244 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
245 unsigned int wordcount)
246 {
247 unsigned long flags;
248
249 spin_lock_irqsave(&pdata->dev_lock, flags);
250
251 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
252 while (wordcount--)
253 __smsc911x_reg_write(pdata, TX_DATA_FIFO,
254 swab32(*buf++));
255 goto out;
256 }
257
258 if (pdata->config.flags & SMSC911X_USE_32BIT) {
259 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
260 goto out;
261 }
262
263 if (pdata->config.flags & SMSC911X_USE_16BIT) {
264 while (wordcount--)
265 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
266 goto out;
267 }
268
269 BUG();
270 out:
271 spin_unlock_irqrestore(&pdata->dev_lock, flags);
272 }
273
274 /* Writes a packet to the TX_DATA_FIFO - shifted version */
275 static inline void
276 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
277 unsigned int wordcount)
278 {
279 unsigned long flags;
280
281 spin_lock_irqsave(&pdata->dev_lock, flags);
282
283 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
284 while (wordcount--)
285 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
286 swab32(*buf++));
287 goto out;
288 }
289
290 if (pdata->config.flags & SMSC911X_USE_32BIT) {
291 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
292 TX_DATA_FIFO), buf, wordcount);
293 goto out;
294 }
295
296 if (pdata->config.flags & SMSC911X_USE_16BIT) {
297 while (wordcount--)
298 __smsc911x_reg_write_shift(pdata,
299 TX_DATA_FIFO, *buf++);
300 goto out;
301 }
302
303 BUG();
304 out:
305 spin_unlock_irqrestore(&pdata->dev_lock, flags);
306 }
307
308 /* Reads a packet out of the RX_DATA_FIFO */
309 static inline void
310 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
311 unsigned int wordcount)
312 {
313 unsigned long flags;
314
315 spin_lock_irqsave(&pdata->dev_lock, flags);
316
317 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
318 while (wordcount--)
319 *buf++ = swab32(__smsc911x_reg_read(pdata,
320 RX_DATA_FIFO));
321 goto out;
322 }
323
324 if (pdata->config.flags & SMSC911X_USE_32BIT) {
325 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
326 goto out;
327 }
328
329 if (pdata->config.flags & SMSC911X_USE_16BIT) {
330 while (wordcount--)
331 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
332 goto out;
333 }
334
335 BUG();
336 out:
337 spin_unlock_irqrestore(&pdata->dev_lock, flags);
338 }
339
340 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
341 static inline void
342 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
343 unsigned int wordcount)
344 {
345 unsigned long flags;
346
347 spin_lock_irqsave(&pdata->dev_lock, flags);
348
349 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
350 while (wordcount--)
351 *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
352 RX_DATA_FIFO));
353 goto out;
354 }
355
356 if (pdata->config.flags & SMSC911X_USE_32BIT) {
357 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
358 RX_DATA_FIFO), buf, wordcount);
359 goto out;
360 }
361
362 if (pdata->config.flags & SMSC911X_USE_16BIT) {
363 while (wordcount--)
364 *buf++ = __smsc911x_reg_read_shift(pdata,
365 RX_DATA_FIFO);
366 goto out;
367 }
368
369 BUG();
370 out:
371 spin_unlock_irqrestore(&pdata->dev_lock, flags);
372 }
373
374 /*
375 * enable regulator and clock resources.
376 */
377 static int smsc911x_enable_resources(struct platform_device *pdev)
378 {
379 struct net_device *ndev = platform_get_drvdata(pdev);
380 struct smsc911x_data *pdata = netdev_priv(ndev);
381 int ret = 0;
382
383 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
384 pdata->supplies);
385 if (ret)
386 netdev_err(ndev, "failed to enable regulators %d\n",
387 ret);
388
389 if (!IS_ERR(pdata->clk)) {
390 ret = clk_prepare_enable(pdata->clk);
391 if (ret < 0)
392 netdev_err(ndev, "failed to enable clock %d\n", ret);
393 }
394
395 return ret;
396 }
397
398 /*
399 * disable resources, currently just regulators.
400 */
401 static int smsc911x_disable_resources(struct platform_device *pdev)
402 {
403 struct net_device *ndev = platform_get_drvdata(pdev);
404 struct smsc911x_data *pdata = netdev_priv(ndev);
405 int ret = 0;
406
407 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
408 pdata->supplies);
409
410 if (!IS_ERR(pdata->clk))
411 clk_disable_unprepare(pdata->clk);
412
413 return ret;
414 }
415
416 /*
417 * Request resources, currently just regulators.
418 *
419 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
420 * these are not always-on we need to request regulators to be turned on
421 * before we can try to access the device registers.
422 */
423 static int smsc911x_request_resources(struct platform_device *pdev)
424 {
425 struct net_device *ndev = platform_get_drvdata(pdev);
426 struct smsc911x_data *pdata = netdev_priv(ndev);
427 int ret = 0;
428
429 /* Request regulators */
430 pdata->supplies[0].supply = "vdd33a";
431 pdata->supplies[1].supply = "vddvario";
432 ret = regulator_bulk_get(&pdev->dev,
433 ARRAY_SIZE(pdata->supplies),
434 pdata->supplies);
435 if (ret)
436 netdev_err(ndev, "couldn't get regulators %d\n",
437 ret);
438
439 /* Request clock */
440 pdata->clk = clk_get(&pdev->dev, NULL);
441 if (IS_ERR(pdata->clk))
442 dev_dbg(&pdev->dev, "couldn't get clock %li\n",
443 PTR_ERR(pdata->clk));
444
445 return ret;
446 }
447
448 /*
449 * Free resources, currently just regulators.
450 *
451 */
452 static void smsc911x_free_resources(struct platform_device *pdev)
453 {
454 struct net_device *ndev = platform_get_drvdata(pdev);
455 struct smsc911x_data *pdata = netdev_priv(ndev);
456
457 /* Free regulators */
458 regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
459 pdata->supplies);
460
461 /* Free clock */
462 if (!IS_ERR(pdata->clk)) {
463 clk_put(pdata->clk);
464 pdata->clk = NULL;
465 }
466 }
467
468 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
469 * and smsc911x_mac_write, so assumes mac_lock is held */
470 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
471 {
472 int i;
473 u32 val;
474
475 SMSC_ASSERT_MAC_LOCK(pdata);
476
477 for (i = 0; i < 40; i++) {
478 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
479 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
480 return 0;
481 }
482 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
483 "MAC_CSR_CMD: 0x%08X", val);
484 return -EIO;
485 }
486
487 /* Fetches a MAC register value. Assumes mac_lock is acquired */
488 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
489 {
490 unsigned int temp;
491
492 SMSC_ASSERT_MAC_LOCK(pdata);
493
494 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
495 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
496 SMSC_WARN(pdata, hw, "MAC busy at entry");
497 return 0xFFFFFFFF;
498 }
499
500 /* Send the MAC cmd */
501 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
502 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
503
504 /* Workaround for hardware read-after-write restriction */
505 temp = smsc911x_reg_read(pdata, BYTE_TEST);
506
507 /* Wait for the read to complete */
508 if (likely(smsc911x_mac_complete(pdata) == 0))
509 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
510
511 SMSC_WARN(pdata, hw, "MAC busy after read");
512 return 0xFFFFFFFF;
513 }
514
515 /* Set a mac register, mac_lock must be acquired before calling */
516 static void smsc911x_mac_write(struct smsc911x_data *pdata,
517 unsigned int offset, u32 val)
518 {
519 unsigned int temp;
520
521 SMSC_ASSERT_MAC_LOCK(pdata);
522
523 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
524 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
525 SMSC_WARN(pdata, hw,
526 "smsc911x_mac_write failed, MAC busy at entry");
527 return;
528 }
529
530 /* Send data to write */
531 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
532
533 /* Write the actual data */
534 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
535 MAC_CSR_CMD_CSR_BUSY_));
536
537 /* Workaround for hardware read-after-write restriction */
538 temp = smsc911x_reg_read(pdata, BYTE_TEST);
539
540 /* Wait for the write to complete */
541 if (likely(smsc911x_mac_complete(pdata) == 0))
542 return;
543
544 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
545 }
546
547 /* Get a phy register */
548 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
549 {
550 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
551 unsigned long flags;
552 unsigned int addr;
553 int i, reg;
554
555 spin_lock_irqsave(&pdata->mac_lock, flags);
556
557 /* Confirm MII not busy */
558 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
559 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
560 reg = -EIO;
561 goto out;
562 }
563
564 /* Set the address, index & direction (read from PHY) */
565 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
566 smsc911x_mac_write(pdata, MII_ACC, addr);
567
568 /* Wait for read to complete w/ timeout */
569 for (i = 0; i < 100; i++)
570 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
571 reg = smsc911x_mac_read(pdata, MII_DATA);
572 goto out;
573 }
574
575 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
576 reg = -EIO;
577
578 out:
579 spin_unlock_irqrestore(&pdata->mac_lock, flags);
580 return reg;
581 }
582
583 /* Set a phy register */
584 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
585 u16 val)
586 {
587 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
588 unsigned long flags;
589 unsigned int addr;
590 int i, reg;
591
592 spin_lock_irqsave(&pdata->mac_lock, flags);
593
594 /* Confirm MII not busy */
595 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
596 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
597 reg = -EIO;
598 goto out;
599 }
600
601 /* Put the data to write in the MAC */
602 smsc911x_mac_write(pdata, MII_DATA, val);
603
604 /* Set the address, index & direction (write to PHY) */
605 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
606 MII_ACC_MII_WRITE_;
607 smsc911x_mac_write(pdata, MII_ACC, addr);
608
609 /* Wait for write to complete w/ timeout */
610 for (i = 0; i < 100; i++)
611 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
612 reg = 0;
613 goto out;
614 }
615
616 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
617 reg = -EIO;
618
619 out:
620 spin_unlock_irqrestore(&pdata->mac_lock, flags);
621 return reg;
622 }
623
624 /* Switch to external phy. Assumes tx and rx are stopped. */
625 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
626 {
627 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
628
629 /* Disable phy clocks to the MAC */
630 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
631 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
632 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
633 udelay(10); /* Enough time for clocks to stop */
634
635 /* Switch to external phy */
636 hwcfg |= HW_CFG_EXT_PHY_EN_;
637 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
638
639 /* Enable phy clocks to the MAC */
640 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
641 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
642 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
643 udelay(10); /* Enough time for clocks to restart */
644
645 hwcfg |= HW_CFG_SMI_SEL_;
646 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
647 }
648
649 /* Autodetects and enables external phy if present on supported chips.
650 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
651 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
652 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
653 {
654 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
655
656 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
657 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
658 pdata->using_extphy = 0;
659 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
660 SMSC_TRACE(pdata, hw, "Forcing external PHY");
661 smsc911x_phy_enable_external(pdata);
662 pdata->using_extphy = 1;
663 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
664 SMSC_TRACE(pdata, hw,
665 "HW_CFG EXT_PHY_DET set, using external PHY");
666 smsc911x_phy_enable_external(pdata);
667 pdata->using_extphy = 1;
668 } else {
669 SMSC_TRACE(pdata, hw,
670 "HW_CFG EXT_PHY_DET clear, using internal PHY");
671 pdata->using_extphy = 0;
672 }
673 }
674
675 /* Fetches a tx status out of the status fifo */
676 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
677 {
678 unsigned int result =
679 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
680
681 if (result != 0)
682 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
683
684 return result;
685 }
686
687 /* Fetches the next rx status */
688 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
689 {
690 unsigned int result =
691 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
692
693 if (result != 0)
694 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
695
696 return result;
697 }
698
699 #ifdef USE_PHY_WORK_AROUND
700 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
701 {
702 unsigned int tries;
703 u32 wrsz;
704 u32 rdsz;
705 ulong bufp;
706
707 for (tries = 0; tries < 10; tries++) {
708 unsigned int txcmd_a;
709 unsigned int txcmd_b;
710 unsigned int status;
711 unsigned int pktlength;
712 unsigned int i;
713
714 /* Zero-out rx packet memory */
715 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
716
717 /* Write tx packet to 118 */
718 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
719 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
720 txcmd_a |= MIN_PACKET_SIZE;
721
722 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
723
724 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
725 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
726
727 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
728 wrsz = MIN_PACKET_SIZE + 3;
729 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
730 wrsz >>= 2;
731
732 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
733
734 /* Wait till transmit is done */
735 i = 60;
736 do {
737 udelay(5);
738 status = smsc911x_tx_get_txstatus(pdata);
739 } while ((i--) && (!status));
740
741 if (!status) {
742 SMSC_WARN(pdata, hw,
743 "Failed to transmit during loopback test");
744 continue;
745 }
746 if (status & TX_STS_ES_) {
747 SMSC_WARN(pdata, hw,
748 "Transmit encountered errors during loopback test");
749 continue;
750 }
751
752 /* Wait till receive is done */
753 i = 60;
754 do {
755 udelay(5);
756 status = smsc911x_rx_get_rxstatus(pdata);
757 } while ((i--) && (!status));
758
759 if (!status) {
760 SMSC_WARN(pdata, hw,
761 "Failed to receive during loopback test");
762 continue;
763 }
764 if (status & RX_STS_ES_) {
765 SMSC_WARN(pdata, hw,
766 "Receive encountered errors during loopback test");
767 continue;
768 }
769
770 pktlength = ((status & 0x3FFF0000UL) >> 16);
771 bufp = (ulong)pdata->loopback_rx_pkt;
772 rdsz = pktlength + 3;
773 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
774 rdsz >>= 2;
775
776 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
777
778 if (pktlength != (MIN_PACKET_SIZE + 4)) {
779 SMSC_WARN(pdata, hw, "Unexpected packet size "
780 "during loop back test, size=%d, will retry",
781 pktlength);
782 } else {
783 unsigned int j;
784 int mismatch = 0;
785 for (j = 0; j < MIN_PACKET_SIZE; j++) {
786 if (pdata->loopback_tx_pkt[j]
787 != pdata->loopback_rx_pkt[j]) {
788 mismatch = 1;
789 break;
790 }
791 }
792 if (!mismatch) {
793 SMSC_TRACE(pdata, hw, "Successfully verified "
794 "loopback packet");
795 return 0;
796 } else {
797 SMSC_WARN(pdata, hw, "Data mismatch "
798 "during loop back test, will retry");
799 }
800 }
801 }
802
803 return -EIO;
804 }
805
806 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
807 {
808 struct phy_device *phy_dev = pdata->phy_dev;
809 unsigned int temp;
810 unsigned int i = 100000;
811
812 BUG_ON(!phy_dev);
813 BUG_ON(!phy_dev->bus);
814
815 SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset");
816 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET);
817 do {
818 msleep(1);
819 temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr,
820 MII_BMCR);
821 } while ((i--) && (temp & BMCR_RESET));
822
823 if (temp & BMCR_RESET) {
824 SMSC_WARN(pdata, hw, "PHY reset failed to complete");
825 return -EIO;
826 }
827 /* Extra delay required because the phy may not be completed with
828 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
829 * enough delay but using 1ms here to be safe */
830 msleep(1);
831
832 return 0;
833 }
834
835 static int smsc911x_phy_loopbacktest(struct net_device *dev)
836 {
837 struct smsc911x_data *pdata = netdev_priv(dev);
838 struct phy_device *phy_dev = pdata->phy_dev;
839 int result = -EIO;
840 unsigned int i, val;
841 unsigned long flags;
842
843 /* Initialise tx packet using broadcast destination address */
844 memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN);
845
846 /* Use incrementing source address */
847 for (i = 6; i < 12; i++)
848 pdata->loopback_tx_pkt[i] = (char)i;
849
850 /* Set length type field */
851 pdata->loopback_tx_pkt[12] = 0x00;
852 pdata->loopback_tx_pkt[13] = 0x00;
853
854 for (i = 14; i < MIN_PACKET_SIZE; i++)
855 pdata->loopback_tx_pkt[i] = (char)i;
856
857 val = smsc911x_reg_read(pdata, HW_CFG);
858 val &= HW_CFG_TX_FIF_SZ_;
859 val |= HW_CFG_SF_;
860 smsc911x_reg_write(pdata, HW_CFG, val);
861
862 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
863 smsc911x_reg_write(pdata, RX_CFG,
864 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
865
866 for (i = 0; i < 10; i++) {
867 /* Set PHY to 10/FD, no ANEG, and loopback mode */
868 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR,
869 BMCR_LOOPBACK | BMCR_FULLDPLX);
870
871 /* Enable MAC tx/rx, FD */
872 spin_lock_irqsave(&pdata->mac_lock, flags);
873 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
874 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
875 spin_unlock_irqrestore(&pdata->mac_lock, flags);
876
877 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
878 result = 0;
879 break;
880 }
881 pdata->resetcount++;
882
883 /* Disable MAC rx */
884 spin_lock_irqsave(&pdata->mac_lock, flags);
885 smsc911x_mac_write(pdata, MAC_CR, 0);
886 spin_unlock_irqrestore(&pdata->mac_lock, flags);
887
888 smsc911x_phy_reset(pdata);
889 }
890
891 /* Disable MAC */
892 spin_lock_irqsave(&pdata->mac_lock, flags);
893 smsc911x_mac_write(pdata, MAC_CR, 0);
894 spin_unlock_irqrestore(&pdata->mac_lock, flags);
895
896 /* Cancel PHY loopback mode */
897 smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0);
898
899 smsc911x_reg_write(pdata, TX_CFG, 0);
900 smsc911x_reg_write(pdata, RX_CFG, 0);
901
902 return result;
903 }
904 #endif /* USE_PHY_WORK_AROUND */
905
906 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
907 {
908 struct phy_device *phy_dev = pdata->phy_dev;
909 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
910 u32 flow;
911 unsigned long flags;
912
913 if (phy_dev->duplex == DUPLEX_FULL) {
914 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
915 u16 rmtadv = phy_read(phy_dev, MII_LPA);
916 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
917
918 if (cap & FLOW_CTRL_RX)
919 flow = 0xFFFF0002;
920 else
921 flow = 0;
922
923 if (cap & FLOW_CTRL_TX)
924 afc |= 0xF;
925 else
926 afc &= ~0xF;
927
928 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
929 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
930 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
931 } else {
932 SMSC_TRACE(pdata, hw, "half duplex");
933 flow = 0;
934 afc |= 0xF;
935 }
936
937 spin_lock_irqsave(&pdata->mac_lock, flags);
938 smsc911x_mac_write(pdata, FLOW, flow);
939 spin_unlock_irqrestore(&pdata->mac_lock, flags);
940
941 smsc911x_reg_write(pdata, AFC_CFG, afc);
942 }
943
944 /* Update link mode if anything has changed. Called periodically when the
945 * PHY is in polling mode, even if nothing has changed. */
946 static void smsc911x_phy_adjust_link(struct net_device *dev)
947 {
948 struct smsc911x_data *pdata = netdev_priv(dev);
949 struct phy_device *phy_dev = pdata->phy_dev;
950 unsigned long flags;
951 int carrier;
952
953 if (phy_dev->duplex != pdata->last_duplex) {
954 unsigned int mac_cr;
955 SMSC_TRACE(pdata, hw, "duplex state has changed");
956
957 spin_lock_irqsave(&pdata->mac_lock, flags);
958 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
959 if (phy_dev->duplex) {
960 SMSC_TRACE(pdata, hw,
961 "configuring for full duplex mode");
962 mac_cr |= MAC_CR_FDPX_;
963 } else {
964 SMSC_TRACE(pdata, hw,
965 "configuring for half duplex mode");
966 mac_cr &= ~MAC_CR_FDPX_;
967 }
968 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
969 spin_unlock_irqrestore(&pdata->mac_lock, flags);
970
971 smsc911x_phy_update_flowcontrol(pdata);
972 pdata->last_duplex = phy_dev->duplex;
973 }
974
975 carrier = netif_carrier_ok(dev);
976 if (carrier != pdata->last_carrier) {
977 SMSC_TRACE(pdata, hw, "carrier state has changed");
978 if (carrier) {
979 SMSC_TRACE(pdata, hw, "configuring for carrier OK");
980 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
981 (!pdata->using_extphy)) {
982 /* Restore original GPIO configuration */
983 pdata->gpio_setting = pdata->gpio_orig_setting;
984 smsc911x_reg_write(pdata, GPIO_CFG,
985 pdata->gpio_setting);
986 }
987 } else {
988 SMSC_TRACE(pdata, hw, "configuring for no carrier");
989 /* Check global setting that LED1
990 * usage is 10/100 indicator */
991 pdata->gpio_setting = smsc911x_reg_read(pdata,
992 GPIO_CFG);
993 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
994 (!pdata->using_extphy)) {
995 /* Force 10/100 LED off, after saving
996 * original GPIO configuration */
997 pdata->gpio_orig_setting = pdata->gpio_setting;
998
999 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
1000 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
1001 | GPIO_CFG_GPIODIR0_
1002 | GPIO_CFG_GPIOD0_);
1003 smsc911x_reg_write(pdata, GPIO_CFG,
1004 pdata->gpio_setting);
1005 }
1006 }
1007 pdata->last_carrier = carrier;
1008 }
1009 }
1010
1011 static int smsc911x_mii_probe(struct net_device *dev)
1012 {
1013 struct smsc911x_data *pdata = netdev_priv(dev);
1014 struct phy_device *phydev = NULL;
1015 int ret;
1016
1017 /* find the first phy */
1018 phydev = phy_find_first(pdata->mii_bus);
1019 if (!phydev) {
1020 netdev_err(dev, "no PHY found\n");
1021 return -ENODEV;
1022 }
1023
1024 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1025 phydev->addr, phydev->phy_id);
1026
1027 ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1028 pdata->config.phy_interface);
1029
1030 if (ret) {
1031 netdev_err(dev, "Could not attach to PHY\n");
1032 return ret;
1033 }
1034
1035 netdev_info(dev,
1036 "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
1037 phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
1038
1039 /* mask with MAC supported features */
1040 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
1041 SUPPORTED_Asym_Pause);
1042 phydev->advertising = phydev->supported;
1043
1044 pdata->phy_dev = phydev;
1045 pdata->last_duplex = -1;
1046 pdata->last_carrier = -1;
1047
1048 #ifdef USE_PHY_WORK_AROUND
1049 if (smsc911x_phy_loopbacktest(dev) < 0) {
1050 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1051 return -ENODEV;
1052 }
1053 SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1054 #endif /* USE_PHY_WORK_AROUND */
1055
1056 SMSC_TRACE(pdata, hw, "phy initialised successfully");
1057 return 0;
1058 }
1059
1060 static int smsc911x_mii_init(struct platform_device *pdev,
1061 struct net_device *dev)
1062 {
1063 struct smsc911x_data *pdata = netdev_priv(dev);
1064 int err = -ENXIO, i;
1065
1066 pdata->mii_bus = mdiobus_alloc();
1067 if (!pdata->mii_bus) {
1068 err = -ENOMEM;
1069 goto err_out_1;
1070 }
1071
1072 pdata->mii_bus->name = SMSC_MDIONAME;
1073 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1074 pdev->name, pdev->id);
1075 pdata->mii_bus->priv = pdata;
1076 pdata->mii_bus->read = smsc911x_mii_read;
1077 pdata->mii_bus->write = smsc911x_mii_write;
1078 pdata->mii_bus->irq = pdata->phy_irq;
1079 for (i = 0; i < PHY_MAX_ADDR; ++i)
1080 pdata->mii_bus->irq[i] = PHY_POLL;
1081
1082 pdata->mii_bus->parent = &pdev->dev;
1083
1084 switch (pdata->idrev & 0xFFFF0000) {
1085 case 0x01170000:
1086 case 0x01150000:
1087 case 0x117A0000:
1088 case 0x115A0000:
1089 /* External PHY supported, try to autodetect */
1090 smsc911x_phy_initialise_external(pdata);
1091 break;
1092 default:
1093 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1094 "using internal PHY");
1095 pdata->using_extphy = 0;
1096 break;
1097 }
1098
1099 if (!pdata->using_extphy) {
1100 /* Mask all PHYs except ID 1 (internal) */
1101 pdata->mii_bus->phy_mask = ~(1 << 1);
1102 }
1103
1104 if (mdiobus_register(pdata->mii_bus)) {
1105 SMSC_WARN(pdata, probe, "Error registering mii bus");
1106 goto err_out_free_bus_2;
1107 }
1108
1109 if (smsc911x_mii_probe(dev) < 0) {
1110 SMSC_WARN(pdata, probe, "Error registering mii bus");
1111 goto err_out_unregister_bus_3;
1112 }
1113
1114 return 0;
1115
1116 err_out_unregister_bus_3:
1117 mdiobus_unregister(pdata->mii_bus);
1118 err_out_free_bus_2:
1119 mdiobus_free(pdata->mii_bus);
1120 err_out_1:
1121 return err;
1122 }
1123
1124 /* Gets the number of tx statuses in the fifo */
1125 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1126 {
1127 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1128 & TX_FIFO_INF_TSUSED_) >> 16;
1129 }
1130
1131 /* Reads tx statuses and increments counters where necessary */
1132 static void smsc911x_tx_update_txcounters(struct net_device *dev)
1133 {
1134 struct smsc911x_data *pdata = netdev_priv(dev);
1135 unsigned int tx_stat;
1136
1137 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1138 if (unlikely(tx_stat & 0x80000000)) {
1139 /* In this driver the packet tag is used as the packet
1140 * length. Since a packet length can never reach the
1141 * size of 0x8000, this bit is reserved. It is worth
1142 * noting that the "reserved bit" in the warning above
1143 * does not reference a hardware defined reserved bit
1144 * but rather a driver defined one.
1145 */
1146 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1147 } else {
1148 if (unlikely(tx_stat & TX_STS_ES_)) {
1149 dev->stats.tx_errors++;
1150 } else {
1151 dev->stats.tx_packets++;
1152 dev->stats.tx_bytes += (tx_stat >> 16);
1153 }
1154 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1155 dev->stats.collisions += 16;
1156 dev->stats.tx_aborted_errors += 1;
1157 } else {
1158 dev->stats.collisions +=
1159 ((tx_stat >> 3) & 0xF);
1160 }
1161 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1162 dev->stats.tx_carrier_errors += 1;
1163 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1164 dev->stats.collisions++;
1165 dev->stats.tx_aborted_errors++;
1166 }
1167 }
1168 }
1169 }
1170
1171 /* Increments the Rx error counters */
1172 static void
1173 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1174 {
1175 int crc_err = 0;
1176
1177 if (unlikely(rxstat & RX_STS_ES_)) {
1178 dev->stats.rx_errors++;
1179 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1180 dev->stats.rx_crc_errors++;
1181 crc_err = 1;
1182 }
1183 }
1184 if (likely(!crc_err)) {
1185 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1186 (rxstat & RX_STS_LENGTH_ERR_)))
1187 dev->stats.rx_length_errors++;
1188 if (rxstat & RX_STS_MCAST_)
1189 dev->stats.multicast++;
1190 }
1191 }
1192
1193 /* Quickly dumps bad packets */
1194 static void
1195 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1196 {
1197 if (likely(pktwords >= 4)) {
1198 unsigned int timeout = 500;
1199 unsigned int val;
1200 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1201 do {
1202 udelay(1);
1203 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1204 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1205
1206 if (unlikely(timeout == 0))
1207 SMSC_WARN(pdata, hw, "Timed out waiting for "
1208 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1209 } else {
1210 unsigned int temp;
1211 while (pktwords--)
1212 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
1213 }
1214 }
1215
1216 /* NAPI poll function */
1217 static int smsc911x_poll(struct napi_struct *napi, int budget)
1218 {
1219 struct smsc911x_data *pdata =
1220 container_of(napi, struct smsc911x_data, napi);
1221 struct net_device *dev = pdata->dev;
1222 int npackets = 0;
1223
1224 while (npackets < budget) {
1225 unsigned int pktlength;
1226 unsigned int pktwords;
1227 struct sk_buff *skb;
1228 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1229
1230 if (!rxstat) {
1231 unsigned int temp;
1232 /* We processed all packets available. Tell NAPI it can
1233 * stop polling then re-enable rx interrupts */
1234 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1235 napi_complete(napi);
1236 temp = smsc911x_reg_read(pdata, INT_EN);
1237 temp |= INT_EN_RSFL_EN_;
1238 smsc911x_reg_write(pdata, INT_EN, temp);
1239 break;
1240 }
1241
1242 /* Count packet for NAPI scheduling, even if it has an error.
1243 * Error packets still require cycles to discard */
1244 npackets++;
1245
1246 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1247 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1248 smsc911x_rx_counterrors(dev, rxstat);
1249
1250 if (unlikely(rxstat & RX_STS_ES_)) {
1251 SMSC_WARN(pdata, rx_err,
1252 "Discarding packet with error bit set");
1253 /* Packet has an error, discard it and continue with
1254 * the next */
1255 smsc911x_rx_fastforward(pdata, pktwords);
1256 dev->stats.rx_dropped++;
1257 continue;
1258 }
1259
1260 skb = netdev_alloc_skb(dev, pktwords << 2);
1261 if (unlikely(!skb)) {
1262 SMSC_WARN(pdata, rx_err,
1263 "Unable to allocate skb for rx packet");
1264 /* Drop the packet and stop this polling iteration */
1265 smsc911x_rx_fastforward(pdata, pktwords);
1266 dev->stats.rx_dropped++;
1267 break;
1268 }
1269
1270 pdata->ops->rx_readfifo(pdata,
1271 (unsigned int *)skb->data, pktwords);
1272
1273 /* Align IP on 16B boundary */
1274 skb_reserve(skb, NET_IP_ALIGN);
1275 skb_put(skb, pktlength - 4);
1276 skb->protocol = eth_type_trans(skb, dev);
1277 skb_checksum_none_assert(skb);
1278 netif_receive_skb(skb);
1279
1280 /* Update counters */
1281 dev->stats.rx_packets++;
1282 dev->stats.rx_bytes += (pktlength - 4);
1283 }
1284
1285 /* Return total received packets */
1286 return npackets;
1287 }
1288
1289 /* Returns hash bit number for given MAC address
1290 * Example:
1291 * 01 00 5E 00 00 01 -> returns bit number 31 */
1292 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1293 {
1294 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1295 }
1296
1297 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1298 {
1299 /* Performs the multicast & mac_cr update. This is called when
1300 * safe on the current hardware, and with the mac_lock held */
1301 unsigned int mac_cr;
1302
1303 SMSC_ASSERT_MAC_LOCK(pdata);
1304
1305 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1306 mac_cr |= pdata->set_bits_mask;
1307 mac_cr &= ~(pdata->clear_bits_mask);
1308 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1309 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1310 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1311 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1312 mac_cr, pdata->hashhi, pdata->hashlo);
1313 }
1314
1315 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1316 {
1317 unsigned int mac_cr;
1318
1319 /* This function is only called for older LAN911x devices
1320 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1321 * be modified during Rx - newer devices immediately update the
1322 * registers.
1323 *
1324 * This is called from interrupt context */
1325
1326 spin_lock(&pdata->mac_lock);
1327
1328 /* Check Rx has stopped */
1329 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1330 SMSC_WARN(pdata, drv, "Rx not stopped");
1331
1332 /* Perform the update - safe to do now Rx has stopped */
1333 smsc911x_rx_multicast_update(pdata);
1334
1335 /* Re-enable Rx */
1336 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1337 mac_cr |= MAC_CR_RXEN_;
1338 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1339
1340 pdata->multicast_update_pending = 0;
1341
1342 spin_unlock(&pdata->mac_lock);
1343 }
1344
1345 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1346 {
1347 int rc = 0;
1348
1349 if (!pdata->phy_dev)
1350 return rc;
1351
1352 /* If the internal PHY is in General Power-Down mode, all, except the
1353 * management interface, is powered-down and stays in that condition as
1354 * long as Phy register bit 0.11 is HIGH.
1355 *
1356 * In that case, clear the bit 0.11, so the PHY powers up and we can
1357 * access to the phy registers.
1358 */
1359 rc = phy_read(pdata->phy_dev, MII_BMCR);
1360 if (rc < 0) {
1361 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1362 return rc;
1363 }
1364
1365 /* If the PHY general power-down bit is not set is not necessary to
1366 * disable the general power down-mode.
1367 */
1368 if (rc & BMCR_PDOWN) {
1369 rc = phy_write(pdata->phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1370 if (rc < 0) {
1371 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1372 return rc;
1373 }
1374
1375 usleep_range(1000, 1500);
1376 }
1377
1378 return 0;
1379 }
1380
1381 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1382 {
1383 int rc = 0;
1384
1385 if (!pdata->phy_dev)
1386 return rc;
1387
1388 rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
1389
1390 if (rc < 0) {
1391 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1392 return rc;
1393 }
1394
1395 /* Only disable if energy detect mode is already enabled */
1396 if (rc & MII_LAN83C185_EDPWRDOWN) {
1397 /* Disable energy detect mode for this SMSC Transceivers */
1398 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
1399 rc & (~MII_LAN83C185_EDPWRDOWN));
1400
1401 if (rc < 0) {
1402 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1403 return rc;
1404 }
1405 /* Allow PHY to wakeup */
1406 mdelay(2);
1407 }
1408
1409 return 0;
1410 }
1411
1412 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1413 {
1414 int rc = 0;
1415
1416 if (!pdata->phy_dev)
1417 return rc;
1418
1419 rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
1420
1421 if (rc < 0) {
1422 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1423 return rc;
1424 }
1425
1426 /* Only enable if energy detect mode is already disabled */
1427 if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1428 /* Enable energy detect mode for this SMSC Transceivers */
1429 rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
1430 rc | MII_LAN83C185_EDPWRDOWN);
1431
1432 if (rc < 0) {
1433 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1434 return rc;
1435 }
1436 }
1437 return 0;
1438 }
1439
1440 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1441 {
1442 unsigned int timeout;
1443 unsigned int temp;
1444 int ret;
1445
1446 /*
1447 * Make sure to power-up the PHY chip before doing a reset, otherwise
1448 * the reset fails.
1449 */
1450 ret = smsc911x_phy_general_power_up(pdata);
1451 if (ret) {
1452 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1453 return ret;
1454 }
1455
1456 /*
1457 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1458 * are initialized in a Energy Detect Power-Down mode that prevents
1459 * the MAC chip to be software reseted. So we have to wakeup the PHY
1460 * before.
1461 */
1462 if (pdata->generation == 4) {
1463 ret = smsc911x_phy_disable_energy_detect(pdata);
1464
1465 if (ret) {
1466 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1467 return ret;
1468 }
1469 }
1470
1471 /* Reset the LAN911x */
1472 smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
1473 timeout = 10;
1474 do {
1475 udelay(10);
1476 temp = smsc911x_reg_read(pdata, HW_CFG);
1477 } while ((--timeout) && (temp & HW_CFG_SRST_));
1478
1479 if (unlikely(temp & HW_CFG_SRST_)) {
1480 SMSC_WARN(pdata, drv, "Failed to complete reset");
1481 return -EIO;
1482 }
1483
1484 if (pdata->generation == 4) {
1485 ret = smsc911x_phy_enable_energy_detect(pdata);
1486
1487 if (ret) {
1488 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1489 return ret;
1490 }
1491 }
1492
1493 return 0;
1494 }
1495
1496 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1497 static void
1498 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1499 {
1500 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1501 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1502 (dev_addr[1] << 8) | dev_addr[0];
1503
1504 SMSC_ASSERT_MAC_LOCK(pdata);
1505
1506 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1507 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1508 }
1509
1510 static void smsc911x_disable_irq_chip(struct net_device *dev)
1511 {
1512 struct smsc911x_data *pdata = netdev_priv(dev);
1513
1514 smsc911x_reg_write(pdata, INT_EN, 0);
1515 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1516 }
1517
1518 static int smsc911x_open(struct net_device *dev)
1519 {
1520 struct smsc911x_data *pdata = netdev_priv(dev);
1521 unsigned int timeout;
1522 unsigned int temp;
1523 unsigned int intcfg;
1524
1525 /* if the phy is not yet registered, retry later*/
1526 if (!pdata->phy_dev) {
1527 SMSC_WARN(pdata, hw, "phy_dev is NULL");
1528 return -EAGAIN;
1529 }
1530
1531 /* Reset the LAN911x */
1532 if (smsc911x_soft_reset(pdata)) {
1533 SMSC_WARN(pdata, hw, "soft reset failed");
1534 return -EIO;
1535 }
1536
1537 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1538 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1539
1540 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1541 spin_lock_irq(&pdata->mac_lock);
1542 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1543 spin_unlock_irq(&pdata->mac_lock);
1544
1545 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1546 timeout = 50;
1547 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1548 --timeout) {
1549 udelay(10);
1550 }
1551
1552 if (unlikely(timeout == 0))
1553 SMSC_WARN(pdata, ifup,
1554 "Timed out waiting for EEPROM busy bit to clear");
1555
1556 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1557
1558 /* The soft reset above cleared the device's MAC address,
1559 * restore it from local copy (set in probe) */
1560 spin_lock_irq(&pdata->mac_lock);
1561 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1562 spin_unlock_irq(&pdata->mac_lock);
1563
1564 /* Initialise irqs, but leave all sources disabled */
1565 smsc911x_disable_irq_chip(dev);
1566
1567 /* Set interrupt deassertion to 100uS */
1568 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1569
1570 if (pdata->config.irq_polarity) {
1571 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1572 intcfg |= INT_CFG_IRQ_POL_;
1573 } else {
1574 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1575 }
1576
1577 if (pdata->config.irq_type) {
1578 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1579 intcfg |= INT_CFG_IRQ_TYPE_;
1580 } else {
1581 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1582 }
1583
1584 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1585
1586 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1587 pdata->software_irq_signal = 0;
1588 smp_wmb();
1589
1590 temp = smsc911x_reg_read(pdata, INT_EN);
1591 temp |= INT_EN_SW_INT_EN_;
1592 smsc911x_reg_write(pdata, INT_EN, temp);
1593
1594 timeout = 1000;
1595 while (timeout--) {
1596 if (pdata->software_irq_signal)
1597 break;
1598 msleep(1);
1599 }
1600
1601 if (!pdata->software_irq_signal) {
1602 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1603 dev->irq);
1604 return -ENODEV;
1605 }
1606 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1607 dev->irq);
1608
1609 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1610 (unsigned long)pdata->ioaddr, dev->irq);
1611
1612 /* Reset the last known duplex and carrier */
1613 pdata->last_duplex = -1;
1614 pdata->last_carrier = -1;
1615
1616 /* Bring the PHY up */
1617 phy_start(pdata->phy_dev);
1618
1619 temp = smsc911x_reg_read(pdata, HW_CFG);
1620 /* Preserve TX FIFO size and external PHY configuration */
1621 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1622 temp |= HW_CFG_SF_;
1623 smsc911x_reg_write(pdata, HW_CFG, temp);
1624
1625 temp = smsc911x_reg_read(pdata, FIFO_INT);
1626 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1627 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1628 smsc911x_reg_write(pdata, FIFO_INT, temp);
1629
1630 /* set RX Data offset to 2 bytes for alignment */
1631 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1632
1633 /* enable NAPI polling before enabling RX interrupts */
1634 napi_enable(&pdata->napi);
1635
1636 temp = smsc911x_reg_read(pdata, INT_EN);
1637 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1638 smsc911x_reg_write(pdata, INT_EN, temp);
1639
1640 spin_lock_irq(&pdata->mac_lock);
1641 temp = smsc911x_mac_read(pdata, MAC_CR);
1642 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1643 smsc911x_mac_write(pdata, MAC_CR, temp);
1644 spin_unlock_irq(&pdata->mac_lock);
1645
1646 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1647
1648 netif_start_queue(dev);
1649 return 0;
1650 }
1651
1652 /* Entry point for stopping the interface */
1653 static int smsc911x_stop(struct net_device *dev)
1654 {
1655 struct smsc911x_data *pdata = netdev_priv(dev);
1656 unsigned int temp;
1657
1658 /* Disable all device interrupts */
1659 temp = smsc911x_reg_read(pdata, INT_CFG);
1660 temp &= ~INT_CFG_IRQ_EN_;
1661 smsc911x_reg_write(pdata, INT_CFG, temp);
1662
1663 /* Stop Tx and Rx polling */
1664 netif_stop_queue(dev);
1665 napi_disable(&pdata->napi);
1666
1667 /* At this point all Rx and Tx activity is stopped */
1668 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1669 smsc911x_tx_update_txcounters(dev);
1670
1671 /* Bring the PHY down */
1672 if (pdata->phy_dev)
1673 phy_stop(pdata->phy_dev);
1674
1675 SMSC_TRACE(pdata, ifdown, "Interface stopped");
1676 return 0;
1677 }
1678
1679 /* Entry point for transmitting a packet */
1680 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1681 {
1682 struct smsc911x_data *pdata = netdev_priv(dev);
1683 unsigned int freespace;
1684 unsigned int tx_cmd_a;
1685 unsigned int tx_cmd_b;
1686 unsigned int temp;
1687 u32 wrsz;
1688 ulong bufp;
1689
1690 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1691
1692 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1693 SMSC_WARN(pdata, tx_err,
1694 "Tx data fifo low, space available: %d", freespace);
1695
1696 /* Word alignment adjustment */
1697 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1698 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1699 tx_cmd_a |= (unsigned int)skb->len;
1700
1701 tx_cmd_b = ((unsigned int)skb->len) << 16;
1702 tx_cmd_b |= (unsigned int)skb->len;
1703
1704 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1705 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1706
1707 bufp = (ulong)skb->data & (~0x3);
1708 wrsz = (u32)skb->len + 3;
1709 wrsz += (u32)((ulong)skb->data & 0x3);
1710 wrsz >>= 2;
1711
1712 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1713 freespace -= (skb->len + 32);
1714 skb_tx_timestamp(skb);
1715 dev_consume_skb_any(skb);
1716
1717 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1718 smsc911x_tx_update_txcounters(dev);
1719
1720 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1721 netif_stop_queue(dev);
1722 temp = smsc911x_reg_read(pdata, FIFO_INT);
1723 temp &= 0x00FFFFFF;
1724 temp |= 0x32000000;
1725 smsc911x_reg_write(pdata, FIFO_INT, temp);
1726 }
1727
1728 return NETDEV_TX_OK;
1729 }
1730
1731 /* Entry point for getting status counters */
1732 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1733 {
1734 struct smsc911x_data *pdata = netdev_priv(dev);
1735 smsc911x_tx_update_txcounters(dev);
1736 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1737 return &dev->stats;
1738 }
1739
1740 /* Entry point for setting addressing modes */
1741 static void smsc911x_set_multicast_list(struct net_device *dev)
1742 {
1743 struct smsc911x_data *pdata = netdev_priv(dev);
1744 unsigned long flags;
1745
1746 if (dev->flags & IFF_PROMISC) {
1747 /* Enabling promiscuous mode */
1748 pdata->set_bits_mask = MAC_CR_PRMS_;
1749 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1750 pdata->hashhi = 0;
1751 pdata->hashlo = 0;
1752 } else if (dev->flags & IFF_ALLMULTI) {
1753 /* Enabling all multicast mode */
1754 pdata->set_bits_mask = MAC_CR_MCPAS_;
1755 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1756 pdata->hashhi = 0;
1757 pdata->hashlo = 0;
1758 } else if (!netdev_mc_empty(dev)) {
1759 /* Enabling specific multicast addresses */
1760 unsigned int hash_high = 0;
1761 unsigned int hash_low = 0;
1762 struct netdev_hw_addr *ha;
1763
1764 pdata->set_bits_mask = MAC_CR_HPFILT_;
1765 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1766
1767 netdev_for_each_mc_addr(ha, dev) {
1768 unsigned int bitnum = smsc911x_hash(ha->addr);
1769 unsigned int mask = 0x01 << (bitnum & 0x1F);
1770
1771 if (bitnum & 0x20)
1772 hash_high |= mask;
1773 else
1774 hash_low |= mask;
1775 }
1776
1777 pdata->hashhi = hash_high;
1778 pdata->hashlo = hash_low;
1779 } else {
1780 /* Enabling local MAC address only */
1781 pdata->set_bits_mask = 0;
1782 pdata->clear_bits_mask =
1783 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1784 pdata->hashhi = 0;
1785 pdata->hashlo = 0;
1786 }
1787
1788 spin_lock_irqsave(&pdata->mac_lock, flags);
1789
1790 if (pdata->generation <= 1) {
1791 /* Older hardware revision - cannot change these flags while
1792 * receiving data */
1793 if (!pdata->multicast_update_pending) {
1794 unsigned int temp;
1795 SMSC_TRACE(pdata, hw, "scheduling mcast update");
1796 pdata->multicast_update_pending = 1;
1797
1798 /* Request the hardware to stop, then perform the
1799 * update when we get an RX_STOP interrupt */
1800 temp = smsc911x_mac_read(pdata, MAC_CR);
1801 temp &= ~(MAC_CR_RXEN_);
1802 smsc911x_mac_write(pdata, MAC_CR, temp);
1803 } else {
1804 /* There is another update pending, this should now
1805 * use the newer values */
1806 }
1807 } else {
1808 /* Newer hardware revision - can write immediately */
1809 smsc911x_rx_multicast_update(pdata);
1810 }
1811
1812 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1813 }
1814
1815 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1816 {
1817 struct net_device *dev = dev_id;
1818 struct smsc911x_data *pdata = netdev_priv(dev);
1819 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1820 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1821 int serviced = IRQ_NONE;
1822 u32 temp;
1823
1824 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1825 temp = smsc911x_reg_read(pdata, INT_EN);
1826 temp &= (~INT_EN_SW_INT_EN_);
1827 smsc911x_reg_write(pdata, INT_EN, temp);
1828 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1829 pdata->software_irq_signal = 1;
1830 smp_wmb();
1831 serviced = IRQ_HANDLED;
1832 }
1833
1834 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1835 /* Called when there is a multicast update scheduled and
1836 * it is now safe to complete the update */
1837 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1838 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1839 if (pdata->multicast_update_pending)
1840 smsc911x_rx_multicast_update_workaround(pdata);
1841 serviced = IRQ_HANDLED;
1842 }
1843
1844 if (intsts & inten & INT_STS_TDFA_) {
1845 temp = smsc911x_reg_read(pdata, FIFO_INT);
1846 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1847 smsc911x_reg_write(pdata, FIFO_INT, temp);
1848 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1849 netif_wake_queue(dev);
1850 serviced = IRQ_HANDLED;
1851 }
1852
1853 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1854 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1855 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1856 serviced = IRQ_HANDLED;
1857 }
1858
1859 if (likely(intsts & inten & INT_STS_RSFL_)) {
1860 if (likely(napi_schedule_prep(&pdata->napi))) {
1861 /* Disable Rx interrupts */
1862 temp = smsc911x_reg_read(pdata, INT_EN);
1863 temp &= (~INT_EN_RSFL_EN_);
1864 smsc911x_reg_write(pdata, INT_EN, temp);
1865 /* Schedule a NAPI poll */
1866 __napi_schedule(&pdata->napi);
1867 } else {
1868 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1869 }
1870 serviced = IRQ_HANDLED;
1871 }
1872
1873 return serviced;
1874 }
1875
1876 #ifdef CONFIG_NET_POLL_CONTROLLER
1877 static void smsc911x_poll_controller(struct net_device *dev)
1878 {
1879 disable_irq(dev->irq);
1880 smsc911x_irqhandler(0, dev);
1881 enable_irq(dev->irq);
1882 }
1883 #endif /* CONFIG_NET_POLL_CONTROLLER */
1884
1885 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1886 {
1887 struct smsc911x_data *pdata = netdev_priv(dev);
1888 struct sockaddr *addr = p;
1889
1890 /* On older hardware revisions we cannot change the mac address
1891 * registers while receiving data. Newer devices can safely change
1892 * this at any time. */
1893 if (pdata->generation <= 1 && netif_running(dev))
1894 return -EBUSY;
1895
1896 if (!is_valid_ether_addr(addr->sa_data))
1897 return -EADDRNOTAVAIL;
1898
1899 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1900
1901 spin_lock_irq(&pdata->mac_lock);
1902 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1903 spin_unlock_irq(&pdata->mac_lock);
1904
1905 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1906
1907 return 0;
1908 }
1909
1910 /* Standard ioctls for mii-tool */
1911 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1912 {
1913 struct smsc911x_data *pdata = netdev_priv(dev);
1914
1915 if (!netif_running(dev) || !pdata->phy_dev)
1916 return -EINVAL;
1917
1918 return phy_mii_ioctl(pdata->phy_dev, ifr, cmd);
1919 }
1920
1921 static int
1922 smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1923 {
1924 struct smsc911x_data *pdata = netdev_priv(dev);
1925
1926 cmd->maxtxpkt = 1;
1927 cmd->maxrxpkt = 1;
1928 return phy_ethtool_gset(pdata->phy_dev, cmd);
1929 }
1930
1931 static int
1932 smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd)
1933 {
1934 struct smsc911x_data *pdata = netdev_priv(dev);
1935
1936 return phy_ethtool_sset(pdata->phy_dev, cmd);
1937 }
1938
1939 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1940 struct ethtool_drvinfo *info)
1941 {
1942 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1943 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1944 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1945 sizeof(info->bus_info));
1946 }
1947
1948 static int smsc911x_ethtool_nwayreset(struct net_device *dev)
1949 {
1950 struct smsc911x_data *pdata = netdev_priv(dev);
1951
1952 return phy_start_aneg(pdata->phy_dev);
1953 }
1954
1955 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1956 {
1957 struct smsc911x_data *pdata = netdev_priv(dev);
1958 return pdata->msg_enable;
1959 }
1960
1961 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1962 {
1963 struct smsc911x_data *pdata = netdev_priv(dev);
1964 pdata->msg_enable = level;
1965 }
1966
1967 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1968 {
1969 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1970 sizeof(u32);
1971 }
1972
1973 static void
1974 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1975 void *buf)
1976 {
1977 struct smsc911x_data *pdata = netdev_priv(dev);
1978 struct phy_device *phy_dev = pdata->phy_dev;
1979 unsigned long flags;
1980 unsigned int i;
1981 unsigned int j = 0;
1982 u32 *data = buf;
1983
1984 regs->version = pdata->idrev;
1985 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1986 data[j++] = smsc911x_reg_read(pdata, i);
1987
1988 for (i = MAC_CR; i <= WUCSR; i++) {
1989 spin_lock_irqsave(&pdata->mac_lock, flags);
1990 data[j++] = smsc911x_mac_read(pdata, i);
1991 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1992 }
1993
1994 for (i = 0; i <= 31; i++)
1995 data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i);
1996 }
1997
1998 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
1999 {
2000 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2001 temp &= ~GPIO_CFG_EEPR_EN_;
2002 smsc911x_reg_write(pdata, GPIO_CFG, temp);
2003 msleep(1);
2004 }
2005
2006 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2007 {
2008 int timeout = 100;
2009 u32 e2cmd;
2010
2011 SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2012 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2013 SMSC_WARN(pdata, drv, "Busy at start");
2014 return -EBUSY;
2015 }
2016
2017 e2cmd = op | E2P_CMD_EPC_BUSY_;
2018 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2019
2020 do {
2021 msleep(1);
2022 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2023 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2024
2025 if (!timeout) {
2026 SMSC_TRACE(pdata, drv, "TIMED OUT");
2027 return -EAGAIN;
2028 }
2029
2030 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2031 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2032 return -EINVAL;
2033 }
2034
2035 return 0;
2036 }
2037
2038 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2039 u8 address, u8 *data)
2040 {
2041 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2042 int ret;
2043
2044 SMSC_TRACE(pdata, drv, "address 0x%x", address);
2045 ret = smsc911x_eeprom_send_cmd(pdata, op);
2046
2047 if (!ret)
2048 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2049
2050 return ret;
2051 }
2052
2053 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2054 u8 address, u8 data)
2055 {
2056 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2057 u32 temp;
2058 int ret;
2059
2060 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2061 ret = smsc911x_eeprom_send_cmd(pdata, op);
2062
2063 if (!ret) {
2064 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2065 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2066
2067 /* Workaround for hardware read-after-write restriction */
2068 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2069
2070 ret = smsc911x_eeprom_send_cmd(pdata, op);
2071 }
2072
2073 return ret;
2074 }
2075
2076 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2077 {
2078 return SMSC911X_EEPROM_SIZE;
2079 }
2080
2081 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2082 struct ethtool_eeprom *eeprom, u8 *data)
2083 {
2084 struct smsc911x_data *pdata = netdev_priv(dev);
2085 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2086 int len;
2087 int i;
2088
2089 smsc911x_eeprom_enable_access(pdata);
2090
2091 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2092 for (i = 0; i < len; i++) {
2093 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2094 if (ret < 0) {
2095 eeprom->len = 0;
2096 return ret;
2097 }
2098 }
2099
2100 memcpy(data, &eeprom_data[eeprom->offset], len);
2101 eeprom->len = len;
2102 return 0;
2103 }
2104
2105 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2106 struct ethtool_eeprom *eeprom, u8 *data)
2107 {
2108 int ret;
2109 struct smsc911x_data *pdata = netdev_priv(dev);
2110
2111 smsc911x_eeprom_enable_access(pdata);
2112 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2113 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2114 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2115
2116 /* Single byte write, according to man page */
2117 eeprom->len = 1;
2118
2119 return ret;
2120 }
2121
2122 static const struct ethtool_ops smsc911x_ethtool_ops = {
2123 .get_settings = smsc911x_ethtool_getsettings,
2124 .set_settings = smsc911x_ethtool_setsettings,
2125 .get_link = ethtool_op_get_link,
2126 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2127 .nway_reset = smsc911x_ethtool_nwayreset,
2128 .get_msglevel = smsc911x_ethtool_getmsglevel,
2129 .set_msglevel = smsc911x_ethtool_setmsglevel,
2130 .get_regs_len = smsc911x_ethtool_getregslen,
2131 .get_regs = smsc911x_ethtool_getregs,
2132 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2133 .get_eeprom = smsc911x_ethtool_get_eeprom,
2134 .set_eeprom = smsc911x_ethtool_set_eeprom,
2135 .get_ts_info = ethtool_op_get_ts_info,
2136 };
2137
2138 static const struct net_device_ops smsc911x_netdev_ops = {
2139 .ndo_open = smsc911x_open,
2140 .ndo_stop = smsc911x_stop,
2141 .ndo_start_xmit = smsc911x_hard_start_xmit,
2142 .ndo_get_stats = smsc911x_get_stats,
2143 .ndo_set_rx_mode = smsc911x_set_multicast_list,
2144 .ndo_do_ioctl = smsc911x_do_ioctl,
2145 .ndo_change_mtu = eth_change_mtu,
2146 .ndo_validate_addr = eth_validate_addr,
2147 .ndo_set_mac_address = smsc911x_set_mac_address,
2148 #ifdef CONFIG_NET_POLL_CONTROLLER
2149 .ndo_poll_controller = smsc911x_poll_controller,
2150 #endif
2151 };
2152
2153 /* copies the current mac address from hardware to dev->dev_addr */
2154 static void smsc911x_read_mac_address(struct net_device *dev)
2155 {
2156 struct smsc911x_data *pdata = netdev_priv(dev);
2157 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2158 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2159
2160 dev->dev_addr[0] = (u8)(mac_low32);
2161 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2162 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2163 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2164 dev->dev_addr[4] = (u8)(mac_high16);
2165 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2166 }
2167
2168 /* Initializing private device structures, only called from probe */
2169 static int smsc911x_init(struct net_device *dev)
2170 {
2171 struct smsc911x_data *pdata = netdev_priv(dev);
2172 unsigned int byte_test, mask;
2173 unsigned int to = 100;
2174
2175 SMSC_TRACE(pdata, probe, "Driver Parameters:");
2176 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2177 (unsigned long)pdata->ioaddr);
2178 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2179 SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2180
2181 spin_lock_init(&pdata->dev_lock);
2182 spin_lock_init(&pdata->mac_lock);
2183
2184 if (pdata->ioaddr == NULL) {
2185 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2186 return -ENODEV;
2187 }
2188
2189 /*
2190 * poll the READY bit in PMT_CTRL. Any other access to the device is
2191 * forbidden while this bit isn't set. Try for 100ms
2192 *
2193 * Note that this test is done before the WORD_SWAP register is
2194 * programmed. So in some configurations the READY bit is at 16 before
2195 * WORD_SWAP is written to. This issue is worked around by waiting
2196 * until either bit 0 or bit 16 gets set in PMT_CTRL.
2197 *
2198 * SMSC has confirmed that checking bit 16 (marked as reserved in
2199 * the datasheet) is fine since these bits "will either never be set
2200 * or can only go high after READY does (so also indicate the device
2201 * is ready)".
2202 */
2203
2204 mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2205 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2206 udelay(1000);
2207
2208 if (to == 0) {
2209 netdev_err(dev, "Device not READY in 100ms aborting\n");
2210 return -ENODEV;
2211 }
2212
2213 /* Check byte ordering */
2214 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2215 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2216 if (byte_test == 0x43218765) {
2217 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2218 "applying WORD_SWAP");
2219 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2220
2221 /* 1 dummy read of BYTE_TEST is needed after a write to
2222 * WORD_SWAP before its contents are valid */
2223 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2224
2225 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2226 }
2227
2228 if (byte_test != 0x87654321) {
2229 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2230 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2231 SMSC_WARN(pdata, probe,
2232 "top 16 bits equal to bottom 16 bits");
2233 SMSC_TRACE(pdata, probe,
2234 "This may mean the chip is set "
2235 "for 32 bit while the bus is reading 16 bit");
2236 }
2237 return -ENODEV;
2238 }
2239
2240 /* Default generation to zero (all workarounds apply) */
2241 pdata->generation = 0;
2242
2243 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2244 switch (pdata->idrev & 0xFFFF0000) {
2245 case 0x01180000:
2246 case 0x01170000:
2247 case 0x01160000:
2248 case 0x01150000:
2249 case 0x218A0000:
2250 /* LAN911[5678] family */
2251 pdata->generation = pdata->idrev & 0x0000FFFF;
2252 break;
2253
2254 case 0x118A0000:
2255 case 0x117A0000:
2256 case 0x116A0000:
2257 case 0x115A0000:
2258 /* LAN921[5678] family */
2259 pdata->generation = 3;
2260 break;
2261
2262 case 0x92100000:
2263 case 0x92110000:
2264 case 0x92200000:
2265 case 0x92210000:
2266 /* LAN9210/LAN9211/LAN9220/LAN9221 */
2267 pdata->generation = 4;
2268 break;
2269
2270 default:
2271 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2272 pdata->idrev);
2273 return -ENODEV;
2274 }
2275
2276 SMSC_TRACE(pdata, probe,
2277 "LAN911x identified, idrev: 0x%08X, generation: %d",
2278 pdata->idrev, pdata->generation);
2279
2280 if (pdata->generation == 0)
2281 SMSC_WARN(pdata, probe,
2282 "This driver is not intended for this chip revision");
2283
2284 /* workaround for platforms without an eeprom, where the mac address
2285 * is stored elsewhere and set by the bootloader. This saves the
2286 * mac address before resetting the device */
2287 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2288 spin_lock_irq(&pdata->mac_lock);
2289 smsc911x_read_mac_address(dev);
2290 spin_unlock_irq(&pdata->mac_lock);
2291 }
2292
2293 /* Reset the LAN911x */
2294 if (smsc911x_soft_reset(pdata))
2295 return -ENODEV;
2296
2297 dev->flags |= IFF_MULTICAST;
2298 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2299 dev->netdev_ops = &smsc911x_netdev_ops;
2300 dev->ethtool_ops = &smsc911x_ethtool_ops;
2301
2302 return 0;
2303 }
2304
2305 static int smsc911x_drv_remove(struct platform_device *pdev)
2306 {
2307 struct net_device *dev;
2308 struct smsc911x_data *pdata;
2309 struct resource *res;
2310
2311 dev = platform_get_drvdata(pdev);
2312 BUG_ON(!dev);
2313 pdata = netdev_priv(dev);
2314 BUG_ON(!pdata);
2315 BUG_ON(!pdata->ioaddr);
2316 BUG_ON(!pdata->phy_dev);
2317
2318 SMSC_TRACE(pdata, ifdown, "Stopping driver");
2319
2320 phy_disconnect(pdata->phy_dev);
2321 pdata->phy_dev = NULL;
2322 mdiobus_unregister(pdata->mii_bus);
2323 mdiobus_free(pdata->mii_bus);
2324
2325 unregister_netdev(dev);
2326 free_irq(dev->irq, dev);
2327 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2328 "smsc911x-memory");
2329 if (!res)
2330 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2331
2332 release_mem_region(res->start, resource_size(res));
2333
2334 iounmap(pdata->ioaddr);
2335
2336 (void)smsc911x_disable_resources(pdev);
2337 smsc911x_free_resources(pdev);
2338
2339 free_netdev(dev);
2340
2341 return 0;
2342 }
2343
2344 /* standard register acces */
2345 static const struct smsc911x_ops standard_smsc911x_ops = {
2346 .reg_read = __smsc911x_reg_read,
2347 .reg_write = __smsc911x_reg_write,
2348 .rx_readfifo = smsc911x_rx_readfifo,
2349 .tx_writefifo = smsc911x_tx_writefifo,
2350 };
2351
2352 /* shifted register access */
2353 static const struct smsc911x_ops shifted_smsc911x_ops = {
2354 .reg_read = __smsc911x_reg_read_shift,
2355 .reg_write = __smsc911x_reg_write_shift,
2356 .rx_readfifo = smsc911x_rx_readfifo_shift,
2357 .tx_writefifo = smsc911x_tx_writefifo_shift,
2358 };
2359
2360 #ifdef CONFIG_OF
2361 static int smsc911x_probe_config_dt(struct smsc911x_platform_config *config,
2362 struct device_node *np)
2363 {
2364 const char *mac;
2365 u32 width = 0;
2366
2367 if (!np)
2368 return -ENODEV;
2369
2370 config->phy_interface = of_get_phy_mode(np);
2371
2372 mac = of_get_mac_address(np);
2373 if (mac)
2374 memcpy(config->mac, mac, ETH_ALEN);
2375
2376 of_property_read_u32(np, "reg-shift", &config->shift);
2377
2378 of_property_read_u32(np, "reg-io-width", &width);
2379 if (width == 4)
2380 config->flags |= SMSC911X_USE_32BIT;
2381 else
2382 config->flags |= SMSC911X_USE_16BIT;
2383
2384 if (of_get_property(np, "smsc,irq-active-high", NULL))
2385 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2386
2387 if (of_get_property(np, "smsc,irq-push-pull", NULL))
2388 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2389
2390 if (of_get_property(np, "smsc,force-internal-phy", NULL))
2391 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2392
2393 if (of_get_property(np, "smsc,force-external-phy", NULL))
2394 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2395
2396 if (of_get_property(np, "smsc,save-mac-address", NULL))
2397 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2398
2399 return 0;
2400 }
2401 #else
2402 static inline int smsc911x_probe_config_dt(
2403 struct smsc911x_platform_config *config,
2404 struct device_node *np)
2405 {
2406 return -ENODEV;
2407 }
2408 #endif /* CONFIG_OF */
2409
2410 static int smsc911x_drv_probe(struct platform_device *pdev)
2411 {
2412 struct device_node *np = pdev->dev.of_node;
2413 struct net_device *dev;
2414 struct smsc911x_data *pdata;
2415 struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2416 struct resource *res, *irq_res;
2417 unsigned int intcfg = 0;
2418 int res_size, irq_flags;
2419 int retval;
2420
2421 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2422 "smsc911x-memory");
2423 if (!res)
2424 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2425 if (!res) {
2426 pr_warn("Could not allocate resource\n");
2427 retval = -ENODEV;
2428 goto out_0;
2429 }
2430 res_size = resource_size(res);
2431
2432 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
2433 if (!irq_res) {
2434 pr_warn("Could not allocate irq resource\n");
2435 retval = -ENODEV;
2436 goto out_0;
2437 }
2438
2439 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2440 retval = -EBUSY;
2441 goto out_0;
2442 }
2443
2444 dev = alloc_etherdev(sizeof(struct smsc911x_data));
2445 if (!dev) {
2446 retval = -ENOMEM;
2447 goto out_release_io_1;
2448 }
2449
2450 SET_NETDEV_DEV(dev, &pdev->dev);
2451
2452 pdata = netdev_priv(dev);
2453 dev->irq = irq_res->start;
2454 irq_flags = irq_res->flags & IRQF_TRIGGER_MASK;
2455 pdata->ioaddr = ioremap_nocache(res->start, res_size);
2456
2457 pdata->dev = dev;
2458 pdata->msg_enable = ((1 << debug) - 1);
2459
2460 platform_set_drvdata(pdev, dev);
2461
2462 retval = smsc911x_request_resources(pdev);
2463 if (retval)
2464 goto out_request_resources_fail;
2465
2466 retval = smsc911x_enable_resources(pdev);
2467 if (retval)
2468 goto out_enable_resources_fail;
2469
2470 if (pdata->ioaddr == NULL) {
2471 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2472 retval = -ENOMEM;
2473 goto out_disable_resources;
2474 }
2475
2476 retval = smsc911x_probe_config_dt(&pdata->config, np);
2477 if (retval && config) {
2478 /* copy config parameters across to pdata */
2479 memcpy(&pdata->config, config, sizeof(pdata->config));
2480 retval = 0;
2481 }
2482
2483 if (retval) {
2484 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2485 goto out_disable_resources;
2486 }
2487
2488 /* assume standard, non-shifted, access to HW registers */
2489 pdata->ops = &standard_smsc911x_ops;
2490 /* apply the right access if shifting is needed */
2491 if (pdata->config.shift)
2492 pdata->ops = &shifted_smsc911x_ops;
2493
2494 retval = smsc911x_init(dev);
2495 if (retval < 0)
2496 goto out_disable_resources;
2497
2498 /* configure irq polarity and type before connecting isr */
2499 if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
2500 intcfg |= INT_CFG_IRQ_POL_;
2501
2502 if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL)
2503 intcfg |= INT_CFG_IRQ_TYPE_;
2504
2505 smsc911x_reg_write(pdata, INT_CFG, intcfg);
2506
2507 /* Ensure interrupts are globally disabled before connecting ISR */
2508 smsc911x_disable_irq_chip(dev);
2509
2510 retval = request_irq(dev->irq, smsc911x_irqhandler,
2511 irq_flags | IRQF_SHARED, dev->name, dev);
2512 if (retval) {
2513 SMSC_WARN(pdata, probe,
2514 "Unable to claim requested irq: %d", dev->irq);
2515 goto out_disable_resources;
2516 }
2517
2518 netif_carrier_off(dev);
2519
2520 retval = register_netdev(dev);
2521 if (retval) {
2522 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2523 goto out_free_irq;
2524 } else {
2525 SMSC_TRACE(pdata, probe,
2526 "Network interface: \"%s\"", dev->name);
2527 }
2528
2529 retval = smsc911x_mii_init(pdev, dev);
2530 if (retval) {
2531 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2532 goto out_unregister_netdev_5;
2533 }
2534
2535 spin_lock_irq(&pdata->mac_lock);
2536
2537 /* Check if mac address has been specified when bringing interface up */
2538 if (is_valid_ether_addr(dev->dev_addr)) {
2539 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2540 SMSC_TRACE(pdata, probe,
2541 "MAC Address is specified by configuration");
2542 } else if (is_valid_ether_addr(pdata->config.mac)) {
2543 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2544 SMSC_TRACE(pdata, probe,
2545 "MAC Address specified by platform data");
2546 } else {
2547 /* Try reading mac address from device. if EEPROM is present
2548 * it will already have been set */
2549 smsc_get_mac(dev);
2550
2551 if (is_valid_ether_addr(dev->dev_addr)) {
2552 /* eeprom values are valid so use them */
2553 SMSC_TRACE(pdata, probe,
2554 "Mac Address is read from LAN911x EEPROM");
2555 } else {
2556 /* eeprom values are invalid, generate random MAC */
2557 eth_hw_addr_random(dev);
2558 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2559 SMSC_TRACE(pdata, probe,
2560 "MAC Address is set to eth_random_addr");
2561 }
2562 }
2563
2564 spin_unlock_irq(&pdata->mac_lock);
2565
2566 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2567
2568 return 0;
2569
2570 out_unregister_netdev_5:
2571 unregister_netdev(dev);
2572 out_free_irq:
2573 free_irq(dev->irq, dev);
2574 out_disable_resources:
2575 (void)smsc911x_disable_resources(pdev);
2576 out_enable_resources_fail:
2577 smsc911x_free_resources(pdev);
2578 out_request_resources_fail:
2579 iounmap(pdata->ioaddr);
2580 free_netdev(dev);
2581 out_release_io_1:
2582 release_mem_region(res->start, resource_size(res));
2583 out_0:
2584 return retval;
2585 }
2586
2587 #ifdef CONFIG_PM
2588 /* This implementation assumes the devices remains powered on its VDDVARIO
2589 * pins during suspend. */
2590
2591 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2592
2593 static int smsc911x_suspend(struct device *dev)
2594 {
2595 struct net_device *ndev = dev_get_drvdata(dev);
2596 struct smsc911x_data *pdata = netdev_priv(ndev);
2597
2598 /* enable wake on LAN, energy detection and the external PME
2599 * signal. */
2600 smsc911x_reg_write(pdata, PMT_CTRL,
2601 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2602 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2603
2604 return 0;
2605 }
2606
2607 static int smsc911x_resume(struct device *dev)
2608 {
2609 struct net_device *ndev = dev_get_drvdata(dev);
2610 struct smsc911x_data *pdata = netdev_priv(ndev);
2611 unsigned int to = 100;
2612
2613 /* Note 3.11 from the datasheet:
2614 * "When the LAN9220 is in a power saving state, a write of any
2615 * data to the BYTE_TEST register will wake-up the device."
2616 */
2617 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2618
2619 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2620 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2621 * if it failed. */
2622 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2623 udelay(1000);
2624
2625 return (to == 0) ? -EIO : 0;
2626 }
2627
2628 static const struct dev_pm_ops smsc911x_pm_ops = {
2629 .suspend = smsc911x_suspend,
2630 .resume = smsc911x_resume,
2631 };
2632
2633 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2634
2635 #else
2636 #define SMSC911X_PM_OPS NULL
2637 #endif
2638
2639 #ifdef CONFIG_OF
2640 static const struct of_device_id smsc911x_dt_ids[] = {
2641 { .compatible = "smsc,lan9115", },
2642 { /* sentinel */ }
2643 };
2644 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2645 #endif
2646
2647 static struct platform_driver smsc911x_driver = {
2648 .probe = smsc911x_drv_probe,
2649 .remove = smsc911x_drv_remove,
2650 .driver = {
2651 .name = SMSC_CHIPNAME,
2652 .owner = THIS_MODULE,
2653 .pm = SMSC911X_PM_OPS,
2654 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2655 },
2656 };
2657
2658 /* Entry point for loading the module */
2659 static int __init smsc911x_init_module(void)
2660 {
2661 SMSC_INITIALIZE();
2662 return platform_driver_register(&smsc911x_driver);
2663 }
2664
2665 /* entry point for unloading the module */
2666 static void __exit smsc911x_cleanup_module(void)
2667 {
2668 platform_driver_unregister(&smsc911x_driver);
2669 }
2670
2671 module_init(smsc911x_init_module);
2672 module_exit(smsc911x_cleanup_module);
Linux kernel - Deliverables
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