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1// SPDX-License-Identifier: GPL-2.0-or-later
2/***************************************************************************
3 *
4 * Copyright (C) 2004-2008 SMSC
5 * Copyright (C) 2005-2008 ARM
6 *
7 ***************************************************************************
8 * Rewritten, heavily based on smsc911x simple driver by SMSC.
9 * Partly uses io macros from smc91x.c by Nicolas Pitre
10 *
11 * Supported devices:
12 * LAN9115, LAN9116, LAN9117, LAN9118
13 * LAN9215, LAN9216, LAN9217, LAN9218
14 * LAN9210, LAN9211
15 * LAN9220, LAN9221
16 * LAN89218,LAN9250
17 */
18
19#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21#include <linux/crc32.h>
22#include <linux/clk.h>
23#include <linux/delay.h>
24#include <linux/errno.h>
25#include <linux/etherdevice.h>
26#include <linux/ethtool.h>
27#include <linux/init.h>
28#include <linux/interrupt.h>
29#include <linux/ioport.h>
30#include <linux/kernel.h>
31#include <linux/module.h>
32#include <linux/netdevice.h>
33#include <linux/platform_device.h>
34#include <linux/regulator/consumer.h>
35#include <linux/sched.h>
36#include <linux/timer.h>
37#include <linux/bug.h>
38#include <linux/bitops.h>
39#include <linux/irq.h>
40#include <linux/io.h>
41#include <linux/swab.h>
42#include <linux/phy.h>
43#include <linux/smsc911x.h>
44#include <linux/device.h>
45#include <linux/of.h>
46#include <linux/of_device.h>
47#include <linux/of_gpio.h>
48#include <linux/of_net.h>
49#include <linux/acpi.h>
50#include <linux/pm_runtime.h>
51#include <linux/property.h>
52#include <linux/gpio/consumer.h>
53
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
60MODULE_LICENSE("GPL");
61MODULE_VERSION(SMSC_DRV_VERSION);
62MODULE_ALIAS("platform:smsc911x");
63
64#if USE_DEBUG > 0
65static int debug = 16;
66#else
67static int debug = 3;
68#endif
69
70module_param(debug, int, 0);
71MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
72
73struct smsc911x_data;
74
75struct smsc911x_ops {
76 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
77 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
78 void (*rx_readfifo)(struct smsc911x_data *pdata,
79 unsigned int *buf, unsigned int wordcount);
80 void (*tx_writefifo)(struct smsc911x_data *pdata,
81 unsigned int *buf, unsigned int wordcount);
82};
83
84#define SMSC911X_NUM_SUPPLIES 2
85
86struct smsc911x_data {
87 void __iomem *ioaddr;
88
89 unsigned int idrev;
90
91 /* used to decide which workarounds apply */
92 unsigned int generation;
93
94 /* device configuration (copied from platform_data during probe) */
95 struct smsc911x_platform_config config;
96
97 /* This needs to be acquired before calling any of below:
98 * smsc911x_mac_read(), smsc911x_mac_write()
99 */
100 spinlock_t mac_lock;
101
102 /* spinlock to ensure register accesses are serialised */
103 spinlock_t dev_lock;
104
105 struct mii_bus *mii_bus;
106 unsigned int using_extphy;
107 int last_duplex;
108 int last_carrier;
109
110 u32 msg_enable;
111 unsigned int gpio_setting;
112 unsigned int gpio_orig_setting;
113 struct net_device *dev;
114 struct napi_struct napi;
115
116 unsigned int software_irq_signal;
117
118#ifdef USE_PHY_WORK_AROUND
119#define MIN_PACKET_SIZE (64)
120 char loopback_tx_pkt[MIN_PACKET_SIZE];
121 char loopback_rx_pkt[MIN_PACKET_SIZE];
122 unsigned int resetcount;
123#endif
124
125 /* Members for Multicast filter workaround */
126 unsigned int multicast_update_pending;
127 unsigned int set_bits_mask;
128 unsigned int clear_bits_mask;
129 unsigned int hashhi;
130 unsigned int hashlo;
131
132 /* register access functions */
133 const struct smsc911x_ops *ops;
134
135 /* regulators */
136 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
137
138 /* Reset GPIO */
139 struct gpio_desc *reset_gpiod;
140
141 /* clock */
142 struct clk *clk;
143};
144
145/* Easy access to information */
146#define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
147
148static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
149{
150 if (pdata->config.flags & SMSC911X_USE_32BIT)
151 return readl(pdata->ioaddr + reg);
152
153 if (pdata->config.flags & SMSC911X_USE_16BIT)
154 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
155 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
156
157 BUG();
158 return 0;
159}
160
161static inline u32
162__smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
163{
164 if (pdata->config.flags & SMSC911X_USE_32BIT)
165 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
166
167 if (pdata->config.flags & SMSC911X_USE_16BIT)
168 return (readw(pdata->ioaddr +
169 __smsc_shift(pdata, reg)) & 0xFFFF) |
170 ((readw(pdata->ioaddr +
171 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
172
173 BUG();
174 return 0;
175}
176
177static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
178{
179 u32 data;
180 unsigned long flags;
181
182 spin_lock_irqsave(&pdata->dev_lock, flags);
183 data = pdata->ops->reg_read(pdata, reg);
184 spin_unlock_irqrestore(&pdata->dev_lock, flags);
185
186 return data;
187}
188
189static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
190 u32 val)
191{
192 if (pdata->config.flags & SMSC911X_USE_32BIT) {
193 writel(val, pdata->ioaddr + reg);
194 return;
195 }
196
197 if (pdata->config.flags & SMSC911X_USE_16BIT) {
198 writew(val & 0xFFFF, pdata->ioaddr + reg);
199 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
200 return;
201 }
202
203 BUG();
204}
205
206static inline void
207__smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
208{
209 if (pdata->config.flags & SMSC911X_USE_32BIT) {
210 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
211 return;
212 }
213
214 if (pdata->config.flags & SMSC911X_USE_16BIT) {
215 writew(val & 0xFFFF,
216 pdata->ioaddr + __smsc_shift(pdata, reg));
217 writew((val >> 16) & 0xFFFF,
218 pdata->ioaddr + __smsc_shift(pdata, reg + 2));
219 return;
220 }
221
222 BUG();
223}
224
225static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
226 u32 val)
227{
228 unsigned long flags;
229
230 spin_lock_irqsave(&pdata->dev_lock, flags);
231 pdata->ops->reg_write(pdata, reg, val);
232 spin_unlock_irqrestore(&pdata->dev_lock, flags);
233}
234
235/* Writes a packet to the TX_DATA_FIFO */
236static inline void
237smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
238 unsigned int wordcount)
239{
240 unsigned long flags;
241
242 spin_lock_irqsave(&pdata->dev_lock, flags);
243
244 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
245 while (wordcount--)
246 __smsc911x_reg_write(pdata, TX_DATA_FIFO,
247 swab32(*buf++));
248 goto out;
249 }
250
251 if (pdata->config.flags & SMSC911X_USE_32BIT) {
252 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
253 goto out;
254 }
255
256 if (pdata->config.flags & SMSC911X_USE_16BIT) {
257 while (wordcount--)
258 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
259 goto out;
260 }
261
262 BUG();
263out:
264 spin_unlock_irqrestore(&pdata->dev_lock, flags);
265}
266
267/* Writes a packet to the TX_DATA_FIFO - shifted version */
268static inline void
269smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
270 unsigned int wordcount)
271{
272 unsigned long flags;
273
274 spin_lock_irqsave(&pdata->dev_lock, flags);
275
276 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
277 while (wordcount--)
278 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
279 swab32(*buf++));
280 goto out;
281 }
282
283 if (pdata->config.flags & SMSC911X_USE_32BIT) {
284 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
285 TX_DATA_FIFO), buf, wordcount);
286 goto out;
287 }
288
289 if (pdata->config.flags & SMSC911X_USE_16BIT) {
290 while (wordcount--)
291 __smsc911x_reg_write_shift(pdata,
292 TX_DATA_FIFO, *buf++);
293 goto out;
294 }
295
296 BUG();
297out:
298 spin_unlock_irqrestore(&pdata->dev_lock, flags);
299}
300
301/* Reads a packet out of the RX_DATA_FIFO */
302static inline void
303smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
304 unsigned int wordcount)
305{
306 unsigned long flags;
307
308 spin_lock_irqsave(&pdata->dev_lock, flags);
309
310 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
311 while (wordcount--)
312 *buf++ = swab32(__smsc911x_reg_read(pdata,
313 RX_DATA_FIFO));
314 goto out;
315 }
316
317 if (pdata->config.flags & SMSC911X_USE_32BIT) {
318 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
319 goto out;
320 }
321
322 if (pdata->config.flags & SMSC911X_USE_16BIT) {
323 while (wordcount--)
324 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
325 goto out;
326 }
327
328 BUG();
329out:
330 spin_unlock_irqrestore(&pdata->dev_lock, flags);
331}
332
333/* Reads a packet out of the RX_DATA_FIFO - shifted version */
334static inline void
335smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
336 unsigned int wordcount)
337{
338 unsigned long flags;
339
340 spin_lock_irqsave(&pdata->dev_lock, flags);
341
342 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
343 while (wordcount--)
344 *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
345 RX_DATA_FIFO));
346 goto out;
347 }
348
349 if (pdata->config.flags & SMSC911X_USE_32BIT) {
350 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
351 RX_DATA_FIFO), buf, wordcount);
352 goto out;
353 }
354
355 if (pdata->config.flags & SMSC911X_USE_16BIT) {
356 while (wordcount--)
357 *buf++ = __smsc911x_reg_read_shift(pdata,
358 RX_DATA_FIFO);
359 goto out;
360 }
361
362 BUG();
363out:
364 spin_unlock_irqrestore(&pdata->dev_lock, flags);
365}
366
367/*
368 * enable regulator and clock resources.
369 */
370static int smsc911x_enable_resources(struct platform_device *pdev)
371{
372 struct net_device *ndev = platform_get_drvdata(pdev);
373 struct smsc911x_data *pdata = netdev_priv(ndev);
374 int ret = 0;
375
376 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
377 pdata->supplies);
378 if (ret)
379 netdev_err(ndev, "failed to enable regulators %d\n",
380 ret);
381
382 if (!IS_ERR(pdata->clk)) {
383 ret = clk_prepare_enable(pdata->clk);
384 if (ret < 0)
385 netdev_err(ndev, "failed to enable clock %d\n", ret);
386 }
387
388 return ret;
389}
390
391/*
392 * disable resources, currently just regulators.
393 */
394static int smsc911x_disable_resources(struct platform_device *pdev)
395{
396 struct net_device *ndev = platform_get_drvdata(pdev);
397 struct smsc911x_data *pdata = netdev_priv(ndev);
398 int ret = 0;
399
400 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
401 pdata->supplies);
402
403 if (!IS_ERR(pdata->clk))
404 clk_disable_unprepare(pdata->clk);
405
406 return ret;
407}
408
409/*
410 * Request resources, currently just regulators.
411 *
412 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
413 * these are not always-on we need to request regulators to be turned on
414 * before we can try to access the device registers.
415 */
416static int smsc911x_request_resources(struct platform_device *pdev)
417{
418 struct net_device *ndev = platform_get_drvdata(pdev);
419 struct smsc911x_data *pdata = netdev_priv(ndev);
420 int ret = 0;
421
422 /* Request regulators */
423 pdata->supplies[0].supply = "vdd33a";
424 pdata->supplies[1].supply = "vddvario";
425 ret = regulator_bulk_get(&pdev->dev,
426 ARRAY_SIZE(pdata->supplies),
427 pdata->supplies);
428 if (ret) {
429 /*
430 * Retry on deferrals, else just report the error
431 * and try to continue.
432 */
433 if (ret == -EPROBE_DEFER)
434 return ret;
435 netdev_err(ndev, "couldn't get regulators %d\n",
436 ret);
437 }
438
439 /* Request optional RESET GPIO */
440 pdata->reset_gpiod = devm_gpiod_get_optional(&pdev->dev,
441 "reset",
442 GPIOD_OUT_LOW);
443
444 /* Request clock */
445 pdata->clk = clk_get(&pdev->dev, NULL);
446 if (IS_ERR(pdata->clk))
447 dev_dbg(&pdev->dev, "couldn't get clock %li\n",
448 PTR_ERR(pdata->clk));
449
450 return ret;
451}
452
453/*
454 * Free resources, currently just regulators.
455 *
456 */
457static void smsc911x_free_resources(struct platform_device *pdev)
458{
459 struct net_device *ndev = platform_get_drvdata(pdev);
460 struct smsc911x_data *pdata = netdev_priv(ndev);
461
462 /* Free regulators */
463 regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
464 pdata->supplies);
465
466 /* Free clock */
467 if (!IS_ERR(pdata->clk)) {
468 clk_put(pdata->clk);
469 pdata->clk = NULL;
470 }
471}
472
473/* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
474 * and smsc911x_mac_write, so assumes mac_lock is held */
475static int smsc911x_mac_complete(struct smsc911x_data *pdata)
476{
477 int i;
478 u32 val;
479
480 SMSC_ASSERT_MAC_LOCK(pdata);
481
482 for (i = 0; i < 40; i++) {
483 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
484 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
485 return 0;
486 }
487 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
488 "MAC_CSR_CMD: 0x%08X", val);
489 return -EIO;
490}
491
492/* Fetches a MAC register value. Assumes mac_lock is acquired */
493static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
494{
495 unsigned int temp;
496
497 SMSC_ASSERT_MAC_LOCK(pdata);
498
499 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
500 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
501 SMSC_WARN(pdata, hw, "MAC busy at entry");
502 return 0xFFFFFFFF;
503 }
504
505 /* Send the MAC cmd */
506 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
507 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
508
509 /* Workaround for hardware read-after-write restriction */
510 temp = smsc911x_reg_read(pdata, BYTE_TEST);
511
512 /* Wait for the read to complete */
513 if (likely(smsc911x_mac_complete(pdata) == 0))
514 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
515
516 SMSC_WARN(pdata, hw, "MAC busy after read");
517 return 0xFFFFFFFF;
518}
519
520/* Set a mac register, mac_lock must be acquired before calling */
521static void smsc911x_mac_write(struct smsc911x_data *pdata,
522 unsigned int offset, u32 val)
523{
524 unsigned int temp;
525
526 SMSC_ASSERT_MAC_LOCK(pdata);
527
528 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
529 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
530 SMSC_WARN(pdata, hw,
531 "smsc911x_mac_write failed, MAC busy at entry");
532 return;
533 }
534
535 /* Send data to write */
536 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
537
538 /* Write the actual data */
539 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
540 MAC_CSR_CMD_CSR_BUSY_));
541
542 /* Workaround for hardware read-after-write restriction */
543 temp = smsc911x_reg_read(pdata, BYTE_TEST);
544
545 /* Wait for the write to complete */
546 if (likely(smsc911x_mac_complete(pdata) == 0))
547 return;
548
549 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
550}
551
552/* Get a phy register */
553static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
554{
555 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
556 unsigned long flags;
557 unsigned int addr;
558 int i, reg;
559
560 spin_lock_irqsave(&pdata->mac_lock, flags);
561
562 /* Confirm MII not busy */
563 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
564 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
565 reg = -EIO;
566 goto out;
567 }
568
569 /* Set the address, index & direction (read from PHY) */
570 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
571 smsc911x_mac_write(pdata, MII_ACC, addr);
572
573 /* Wait for read to complete w/ timeout */
574 for (i = 0; i < 100; i++)
575 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
576 reg = smsc911x_mac_read(pdata, MII_DATA);
577 goto out;
578 }
579
580 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
581 reg = -EIO;
582
583out:
584 spin_unlock_irqrestore(&pdata->mac_lock, flags);
585 return reg;
586}
587
588/* Set a phy register */
589static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
590 u16 val)
591{
592 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
593 unsigned long flags;
594 unsigned int addr;
595 int i, reg;
596
597 spin_lock_irqsave(&pdata->mac_lock, flags);
598
599 /* Confirm MII not busy */
600 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
601 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
602 reg = -EIO;
603 goto out;
604 }
605
606 /* Put the data to write in the MAC */
607 smsc911x_mac_write(pdata, MII_DATA, val);
608
609 /* Set the address, index & direction (write to PHY) */
610 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
611 MII_ACC_MII_WRITE_;
612 smsc911x_mac_write(pdata, MII_ACC, addr);
613
614 /* Wait for write to complete w/ timeout */
615 for (i = 0; i < 100; i++)
616 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
617 reg = 0;
618 goto out;
619 }
620
621 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
622 reg = -EIO;
623
624out:
625 spin_unlock_irqrestore(&pdata->mac_lock, flags);
626 return reg;
627}
628
629/* Switch to external phy. Assumes tx and rx are stopped. */
630static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
631{
632 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
633
634 /* Disable phy clocks to the MAC */
635 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
636 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
637 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
638 udelay(10); /* Enough time for clocks to stop */
639
640 /* Switch to external phy */
641 hwcfg |= HW_CFG_EXT_PHY_EN_;
642 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
643
644 /* Enable phy clocks to the MAC */
645 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
646 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
647 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
648 udelay(10); /* Enough time for clocks to restart */
649
650 hwcfg |= HW_CFG_SMI_SEL_;
651 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
652}
653
654/* Autodetects and enables external phy if present on supported chips.
655 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
656 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
657static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
658{
659 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
660
661 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
662 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
663 pdata->using_extphy = 0;
664 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
665 SMSC_TRACE(pdata, hw, "Forcing external PHY");
666 smsc911x_phy_enable_external(pdata);
667 pdata->using_extphy = 1;
668 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
669 SMSC_TRACE(pdata, hw,
670 "HW_CFG EXT_PHY_DET set, using external PHY");
671 smsc911x_phy_enable_external(pdata);
672 pdata->using_extphy = 1;
673 } else {
674 SMSC_TRACE(pdata, hw,
675 "HW_CFG EXT_PHY_DET clear, using internal PHY");
676 pdata->using_extphy = 0;
677 }
678}
679
680/* Fetches a tx status out of the status fifo */
681static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
682{
683 unsigned int result =
684 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
685
686 if (result != 0)
687 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
688
689 return result;
690}
691
692/* Fetches the next rx status */
693static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
694{
695 unsigned int result =
696 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
697
698 if (result != 0)
699 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
700
701 return result;
702}
703
704#ifdef USE_PHY_WORK_AROUND
705static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
706{
707 unsigned int tries;
708 u32 wrsz;
709 u32 rdsz;
710 ulong bufp;
711
712 for (tries = 0; tries < 10; tries++) {
713 unsigned int txcmd_a;
714 unsigned int txcmd_b;
715 unsigned int status;
716 unsigned int pktlength;
717 unsigned int i;
718
719 /* Zero-out rx packet memory */
720 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
721
722 /* Write tx packet to 118 */
723 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
724 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
725 txcmd_a |= MIN_PACKET_SIZE;
726
727 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
728
729 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
730 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
731
732 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
733 wrsz = MIN_PACKET_SIZE + 3;
734 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
735 wrsz >>= 2;
736
737 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
738
739 /* Wait till transmit is done */
740 i = 60;
741 do {
742 udelay(5);
743 status = smsc911x_tx_get_txstatus(pdata);
744 } while ((i--) && (!status));
745
746 if (!status) {
747 SMSC_WARN(pdata, hw,
748 "Failed to transmit during loopback test");
749 continue;
750 }
751 if (status & TX_STS_ES_) {
752 SMSC_WARN(pdata, hw,
753 "Transmit encountered errors during loopback test");
754 continue;
755 }
756
757 /* Wait till receive is done */
758 i = 60;
759 do {
760 udelay(5);
761 status = smsc911x_rx_get_rxstatus(pdata);
762 } while ((i--) && (!status));
763
764 if (!status) {
765 SMSC_WARN(pdata, hw,
766 "Failed to receive during loopback test");
767 continue;
768 }
769 if (status & RX_STS_ES_) {
770 SMSC_WARN(pdata, hw,
771 "Receive encountered errors during loopback test");
772 continue;
773 }
774
775 pktlength = ((status & 0x3FFF0000UL) >> 16);
776 bufp = (ulong)pdata->loopback_rx_pkt;
777 rdsz = pktlength + 3;
778 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
779 rdsz >>= 2;
780
781 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
782
783 if (pktlength != (MIN_PACKET_SIZE + 4)) {
784 SMSC_WARN(pdata, hw, "Unexpected packet size "
785 "during loop back test, size=%d, will retry",
786 pktlength);
787 } else {
788 unsigned int j;
789 int mismatch = 0;
790 for (j = 0; j < MIN_PACKET_SIZE; j++) {
791 if (pdata->loopback_tx_pkt[j]
792 != pdata->loopback_rx_pkt[j]) {
793 mismatch = 1;
794 break;
795 }
796 }
797 if (!mismatch) {
798 SMSC_TRACE(pdata, hw, "Successfully verified "
799 "loopback packet");
800 return 0;
801 } else {
802 SMSC_WARN(pdata, hw, "Data mismatch "
803 "during loop back test, will retry");
804 }
805 }
806 }
807
808 return -EIO;
809}
810
811static int smsc911x_phy_reset(struct smsc911x_data *pdata)
812{
813 unsigned int temp;
814 unsigned int i = 100000;
815
816 temp = smsc911x_reg_read(pdata, PMT_CTRL);
817 smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_);
818 do {
819 msleep(1);
820 temp = smsc911x_reg_read(pdata, PMT_CTRL);
821 } while ((i--) && (temp & PMT_CTRL_PHY_RST_));
822
823 if (unlikely(temp & PMT_CTRL_PHY_RST_)) {
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
835static int smsc911x_phy_loopbacktest(struct net_device *dev)
836{
837 struct smsc911x_data *pdata = netdev_priv(dev);
838 struct phy_device *phy_dev = dev->phydev;
839 int result = -EIO;
840 unsigned int i, val;
841 unsigned long flags;
842
843 /* Initialise tx packet using broadcast destination address */
844 eth_broadcast_addr(pdata->loopback_tx_pkt);
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->mdio.bus, phy_dev->mdio.addr,
869 MII_BMCR, 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->mdio.bus, phy_dev->mdio.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
906static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
907{
908 struct net_device *ndev = pdata->dev;
909 struct phy_device *phy_dev = ndev->phydev;
910 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
911 u32 flow;
912 unsigned long flags;
913
914 if (phy_dev->duplex == DUPLEX_FULL) {
915 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
916 u16 rmtadv = phy_read(phy_dev, MII_LPA);
917 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
918
919 if (cap & FLOW_CTRL_RX)
920 flow = 0xFFFF0002;
921 else
922 flow = 0;
923
924 if (cap & FLOW_CTRL_TX)
925 afc |= 0xF;
926 else
927 afc &= ~0xF;
928
929 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
930 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
931 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
932 } else {
933 SMSC_TRACE(pdata, hw, "half duplex");
934 flow = 0;
935 afc |= 0xF;
936 }
937
938 spin_lock_irqsave(&pdata->mac_lock, flags);
939 smsc911x_mac_write(pdata, FLOW, flow);
940 spin_unlock_irqrestore(&pdata->mac_lock, flags);
941
942 smsc911x_reg_write(pdata, AFC_CFG, afc);
943}
944
945/* Update link mode if anything has changed. Called periodically when the
946 * PHY is in polling mode, even if nothing has changed. */
947static void smsc911x_phy_adjust_link(struct net_device *dev)
948{
949 struct smsc911x_data *pdata = netdev_priv(dev);
950 struct phy_device *phy_dev = dev->phydev;
951 unsigned long flags;
952 int carrier;
953
954 if (phy_dev->duplex != pdata->last_duplex) {
955 unsigned int mac_cr;
956 SMSC_TRACE(pdata, hw, "duplex state has changed");
957
958 spin_lock_irqsave(&pdata->mac_lock, flags);
959 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
960 if (phy_dev->duplex) {
961 SMSC_TRACE(pdata, hw,
962 "configuring for full duplex mode");
963 mac_cr |= MAC_CR_FDPX_;
964 } else {
965 SMSC_TRACE(pdata, hw,
966 "configuring for half duplex mode");
967 mac_cr &= ~MAC_CR_FDPX_;
968 }
969 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
970 spin_unlock_irqrestore(&pdata->mac_lock, flags);
971
972 smsc911x_phy_update_flowcontrol(pdata);
973 pdata->last_duplex = phy_dev->duplex;
974 }
975
976 carrier = netif_carrier_ok(dev);
977 if (carrier != pdata->last_carrier) {
978 SMSC_TRACE(pdata, hw, "carrier state has changed");
979 if (carrier) {
980 SMSC_TRACE(pdata, hw, "configuring for carrier OK");
981 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
982 (!pdata->using_extphy)) {
983 /* Restore original GPIO configuration */
984 pdata->gpio_setting = pdata->gpio_orig_setting;
985 smsc911x_reg_write(pdata, GPIO_CFG,
986 pdata->gpio_setting);
987 }
988 } else {
989 SMSC_TRACE(pdata, hw, "configuring for no carrier");
990 /* Check global setting that LED1
991 * usage is 10/100 indicator */
992 pdata->gpio_setting = smsc911x_reg_read(pdata,
993 GPIO_CFG);
994 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
995 (!pdata->using_extphy)) {
996 /* Force 10/100 LED off, after saving
997 * original GPIO configuration */
998 pdata->gpio_orig_setting = pdata->gpio_setting;
999
1000 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
1001 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
1002 | GPIO_CFG_GPIODIR0_
1003 | GPIO_CFG_GPIOD0_);
1004 smsc911x_reg_write(pdata, GPIO_CFG,
1005 pdata->gpio_setting);
1006 }
1007 }
1008 pdata->last_carrier = carrier;
1009 }
1010}
1011
1012static int smsc911x_mii_probe(struct net_device *dev)
1013{
1014 struct smsc911x_data *pdata = netdev_priv(dev);
1015 struct phy_device *phydev = NULL;
1016 int ret;
1017
1018 /* find the first phy */
1019 phydev = phy_find_first(pdata->mii_bus);
1020 if (!phydev) {
1021 netdev_err(dev, "no PHY found\n");
1022 return -ENODEV;
1023 }
1024
1025 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1026 phydev->mdio.addr, phydev->phy_id);
1027
1028 ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1029 pdata->config.phy_interface);
1030
1031 if (ret) {
1032 netdev_err(dev, "Could not attach to PHY\n");
1033 return ret;
1034 }
1035
1036 phy_attached_info(phydev);
1037
1038 phy_set_max_speed(phydev, SPEED_100);
1039
1040 /* mask with MAC supported features */
1041 phy_support_asym_pause(phydev);
1042
1043 pdata->last_duplex = -1;
1044 pdata->last_carrier = -1;
1045
1046#ifdef USE_PHY_WORK_AROUND
1047 if (smsc911x_phy_loopbacktest(dev) < 0) {
1048 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1049 phy_disconnect(phydev);
1050 return -ENODEV;
1051 }
1052 SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1053#endif /* USE_PHY_WORK_AROUND */
1054
1055 SMSC_TRACE(pdata, hw, "phy initialised successfully");
1056 return 0;
1057}
1058
1059static int smsc911x_mii_init(struct platform_device *pdev,
1060 struct net_device *dev)
1061{
1062 struct smsc911x_data *pdata = netdev_priv(dev);
1063 int err = -ENXIO;
1064
1065 pdata->mii_bus = mdiobus_alloc();
1066 if (!pdata->mii_bus) {
1067 err = -ENOMEM;
1068 goto err_out_1;
1069 }
1070
1071 pdata->mii_bus->name = SMSC_MDIONAME;
1072 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1073 pdev->name, pdev->id);
1074 pdata->mii_bus->priv = pdata;
1075 pdata->mii_bus->read = smsc911x_mii_read;
1076 pdata->mii_bus->write = smsc911x_mii_write;
1077
1078 pdata->mii_bus->parent = &pdev->dev;
1079
1080 switch (pdata->idrev & 0xFFFF0000) {
1081 case 0x01170000:
1082 case 0x01150000:
1083 case 0x117A0000:
1084 case 0x115A0000:
1085 /* External PHY supported, try to autodetect */
1086 smsc911x_phy_initialise_external(pdata);
1087 break;
1088 default:
1089 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1090 "using internal PHY");
1091 pdata->using_extphy = 0;
1092 break;
1093 }
1094
1095 if (!pdata->using_extphy) {
1096 /* Mask all PHYs except ID 1 (internal) */
1097 pdata->mii_bus->phy_mask = ~(1 << 1);
1098 }
1099
1100 if (mdiobus_register(pdata->mii_bus)) {
1101 SMSC_WARN(pdata, probe, "Error registering mii bus");
1102 goto err_out_free_bus_2;
1103 }
1104
1105 return 0;
1106
1107err_out_free_bus_2:
1108 mdiobus_free(pdata->mii_bus);
1109err_out_1:
1110 return err;
1111}
1112
1113/* Gets the number of tx statuses in the fifo */
1114static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1115{
1116 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1117 & TX_FIFO_INF_TSUSED_) >> 16;
1118}
1119
1120/* Reads tx statuses and increments counters where necessary */
1121static void smsc911x_tx_update_txcounters(struct net_device *dev)
1122{
1123 struct smsc911x_data *pdata = netdev_priv(dev);
1124 unsigned int tx_stat;
1125
1126 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1127 if (unlikely(tx_stat & 0x80000000)) {
1128 /* In this driver the packet tag is used as the packet
1129 * length. Since a packet length can never reach the
1130 * size of 0x8000, this bit is reserved. It is worth
1131 * noting that the "reserved bit" in the warning above
1132 * does not reference a hardware defined reserved bit
1133 * but rather a driver defined one.
1134 */
1135 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1136 } else {
1137 if (unlikely(tx_stat & TX_STS_ES_)) {
1138 dev->stats.tx_errors++;
1139 } else {
1140 dev->stats.tx_packets++;
1141 dev->stats.tx_bytes += (tx_stat >> 16);
1142 }
1143 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1144 dev->stats.collisions += 16;
1145 dev->stats.tx_aborted_errors += 1;
1146 } else {
1147 dev->stats.collisions +=
1148 ((tx_stat >> 3) & 0xF);
1149 }
1150 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1151 dev->stats.tx_carrier_errors += 1;
1152 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1153 dev->stats.collisions++;
1154 dev->stats.tx_aborted_errors++;
1155 }
1156 }
1157 }
1158}
1159
1160/* Increments the Rx error counters */
1161static void
1162smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1163{
1164 int crc_err = 0;
1165
1166 if (unlikely(rxstat & RX_STS_ES_)) {
1167 dev->stats.rx_errors++;
1168 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1169 dev->stats.rx_crc_errors++;
1170 crc_err = 1;
1171 }
1172 }
1173 if (likely(!crc_err)) {
1174 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1175 (rxstat & RX_STS_LENGTH_ERR_)))
1176 dev->stats.rx_length_errors++;
1177 if (rxstat & RX_STS_MCAST_)
1178 dev->stats.multicast++;
1179 }
1180}
1181
1182/* Quickly dumps bad packets */
1183static void
1184smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1185{
1186 if (likely(pktwords >= 4)) {
1187 unsigned int timeout = 500;
1188 unsigned int val;
1189 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1190 do {
1191 udelay(1);
1192 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1193 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1194
1195 if (unlikely(timeout == 0))
1196 SMSC_WARN(pdata, hw, "Timed out waiting for "
1197 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1198 } else {
1199 unsigned int temp;
1200 while (pktwords--)
1201 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
1202 }
1203}
1204
1205/* NAPI poll function */
1206static int smsc911x_poll(struct napi_struct *napi, int budget)
1207{
1208 struct smsc911x_data *pdata =
1209 container_of(napi, struct smsc911x_data, napi);
1210 struct net_device *dev = pdata->dev;
1211 int npackets = 0;
1212
1213 while (npackets < budget) {
1214 unsigned int pktlength;
1215 unsigned int pktwords;
1216 struct sk_buff *skb;
1217 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1218
1219 if (!rxstat) {
1220 unsigned int temp;
1221 /* We processed all packets available. Tell NAPI it can
1222 * stop polling then re-enable rx interrupts */
1223 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1224 napi_complete(napi);
1225 temp = smsc911x_reg_read(pdata, INT_EN);
1226 temp |= INT_EN_RSFL_EN_;
1227 smsc911x_reg_write(pdata, INT_EN, temp);
1228 break;
1229 }
1230
1231 /* Count packet for NAPI scheduling, even if it has an error.
1232 * Error packets still require cycles to discard */
1233 npackets++;
1234
1235 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1236 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1237 smsc911x_rx_counterrors(dev, rxstat);
1238
1239 if (unlikely(rxstat & RX_STS_ES_)) {
1240 SMSC_WARN(pdata, rx_err,
1241 "Discarding packet with error bit set");
1242 /* Packet has an error, discard it and continue with
1243 * the next */
1244 smsc911x_rx_fastforward(pdata, pktwords);
1245 dev->stats.rx_dropped++;
1246 continue;
1247 }
1248
1249 skb = netdev_alloc_skb(dev, pktwords << 2);
1250 if (unlikely(!skb)) {
1251 SMSC_WARN(pdata, rx_err,
1252 "Unable to allocate skb for rx packet");
1253 /* Drop the packet and stop this polling iteration */
1254 smsc911x_rx_fastforward(pdata, pktwords);
1255 dev->stats.rx_dropped++;
1256 break;
1257 }
1258
1259 pdata->ops->rx_readfifo(pdata,
1260 (unsigned int *)skb->data, pktwords);
1261
1262 /* Align IP on 16B boundary */
1263 skb_reserve(skb, NET_IP_ALIGN);
1264 skb_put(skb, pktlength - 4);
1265 skb->protocol = eth_type_trans(skb, dev);
1266 skb_checksum_none_assert(skb);
1267 netif_receive_skb(skb);
1268
1269 /* Update counters */
1270 dev->stats.rx_packets++;
1271 dev->stats.rx_bytes += (pktlength - 4);
1272 }
1273
1274 /* Return total received packets */
1275 return npackets;
1276}
1277
1278/* Returns hash bit number for given MAC address
1279 * Example:
1280 * 01 00 5E 00 00 01 -> returns bit number 31 */
1281static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1282{
1283 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1284}
1285
1286static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1287{
1288 /* Performs the multicast & mac_cr update. This is called when
1289 * safe on the current hardware, and with the mac_lock held */
1290 unsigned int mac_cr;
1291
1292 SMSC_ASSERT_MAC_LOCK(pdata);
1293
1294 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1295 mac_cr |= pdata->set_bits_mask;
1296 mac_cr &= ~(pdata->clear_bits_mask);
1297 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1298 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1299 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1300 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1301 mac_cr, pdata->hashhi, pdata->hashlo);
1302}
1303
1304static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1305{
1306 unsigned int mac_cr;
1307
1308 /* This function is only called for older LAN911x devices
1309 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1310 * be modified during Rx - newer devices immediately update the
1311 * registers.
1312 *
1313 * This is called from interrupt context */
1314
1315 spin_lock(&pdata->mac_lock);
1316
1317 /* Check Rx has stopped */
1318 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1319 SMSC_WARN(pdata, drv, "Rx not stopped");
1320
1321 /* Perform the update - safe to do now Rx has stopped */
1322 smsc911x_rx_multicast_update(pdata);
1323
1324 /* Re-enable Rx */
1325 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1326 mac_cr |= MAC_CR_RXEN_;
1327 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1328
1329 pdata->multicast_update_pending = 0;
1330
1331 spin_unlock(&pdata->mac_lock);
1332}
1333
1334static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1335{
1336 struct net_device *ndev = pdata->dev;
1337 struct phy_device *phy_dev = ndev->phydev;
1338 int rc = 0;
1339
1340 if (!phy_dev)
1341 return rc;
1342
1343 /* If the internal PHY is in General Power-Down mode, all, except the
1344 * management interface, is powered-down and stays in that condition as
1345 * long as Phy register bit 0.11 is HIGH.
1346 *
1347 * In that case, clear the bit 0.11, so the PHY powers up and we can
1348 * access to the phy registers.
1349 */
1350 rc = phy_read(phy_dev, MII_BMCR);
1351 if (rc < 0) {
1352 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1353 return rc;
1354 }
1355
1356 /* If the PHY general power-down bit is not set is not necessary to
1357 * disable the general power down-mode.
1358 */
1359 if (rc & BMCR_PDOWN) {
1360 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1361 if (rc < 0) {
1362 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1363 return rc;
1364 }
1365
1366 usleep_range(1000, 1500);
1367 }
1368
1369 return 0;
1370}
1371
1372static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1373{
1374 struct net_device *ndev = pdata->dev;
1375 struct phy_device *phy_dev = ndev->phydev;
1376 int rc = 0;
1377
1378 if (!phy_dev)
1379 return rc;
1380
1381 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1382
1383 if (rc < 0) {
1384 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1385 return rc;
1386 }
1387
1388 /* Only disable if energy detect mode is already enabled */
1389 if (rc & MII_LAN83C185_EDPWRDOWN) {
1390 /* Disable energy detect mode for this SMSC Transceivers */
1391 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1392 rc & (~MII_LAN83C185_EDPWRDOWN));
1393
1394 if (rc < 0) {
1395 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1396 return rc;
1397 }
1398 /* Allow PHY to wakeup */
1399 mdelay(2);
1400 }
1401
1402 return 0;
1403}
1404
1405static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1406{
1407 struct net_device *ndev = pdata->dev;
1408 struct phy_device *phy_dev = ndev->phydev;
1409 int rc = 0;
1410
1411 if (!phy_dev)
1412 return rc;
1413
1414 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1415
1416 if (rc < 0) {
1417 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1418 return rc;
1419 }
1420
1421 /* Only enable if energy detect mode is already disabled */
1422 if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1423 /* Enable energy detect mode for this SMSC Transceivers */
1424 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1425 rc | MII_LAN83C185_EDPWRDOWN);
1426
1427 if (rc < 0) {
1428 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1429 return rc;
1430 }
1431 }
1432 return 0;
1433}
1434
1435static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1436{
1437 unsigned int timeout;
1438 unsigned int temp;
1439 int ret;
1440 unsigned int reset_offset = HW_CFG;
1441 unsigned int reset_mask = HW_CFG_SRST_;
1442
1443 /*
1444 * Make sure to power-up the PHY chip before doing a reset, otherwise
1445 * the reset fails.
1446 */
1447 ret = smsc911x_phy_general_power_up(pdata);
1448 if (ret) {
1449 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1450 return ret;
1451 }
1452
1453 /*
1454 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1455 * are initialized in a Energy Detect Power-Down mode that prevents
1456 * the MAC chip to be software reseted. So we have to wakeup the PHY
1457 * before.
1458 */
1459 if (pdata->generation == 4) {
1460 ret = smsc911x_phy_disable_energy_detect(pdata);
1461
1462 if (ret) {
1463 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1464 return ret;
1465 }
1466 }
1467
1468 if ((pdata->idrev & 0xFFFF0000) == LAN9250) {
1469 /* special reset for LAN9250 */
1470 reset_offset = RESET_CTL;
1471 reset_mask = RESET_CTL_DIGITAL_RST_;
1472 }
1473
1474 /* Reset the LAN911x */
1475 smsc911x_reg_write(pdata, reset_offset, reset_mask);
1476
1477 /* verify reset bit is cleared */
1478 timeout = 10;
1479 do {
1480 udelay(10);
1481 temp = smsc911x_reg_read(pdata, reset_offset);
1482 } while ((--timeout) && (temp & reset_mask));
1483
1484 if (unlikely(temp & reset_mask)) {
1485 SMSC_WARN(pdata, drv, "Failed to complete reset");
1486 return -EIO;
1487 }
1488
1489 if (pdata->generation == 4) {
1490 ret = smsc911x_phy_enable_energy_detect(pdata);
1491
1492 if (ret) {
1493 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1494 return ret;
1495 }
1496 }
1497
1498 return 0;
1499}
1500
1501/* Sets the device MAC address to dev_addr, called with mac_lock held */
1502static void
1503smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1504{
1505 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1506 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1507 (dev_addr[1] << 8) | dev_addr[0];
1508
1509 SMSC_ASSERT_MAC_LOCK(pdata);
1510
1511 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1512 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1513}
1514
1515static void smsc911x_disable_irq_chip(struct net_device *dev)
1516{
1517 struct smsc911x_data *pdata = netdev_priv(dev);
1518
1519 smsc911x_reg_write(pdata, INT_EN, 0);
1520 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1521}
1522
1523static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1524{
1525 struct net_device *dev = dev_id;
1526 struct smsc911x_data *pdata = netdev_priv(dev);
1527 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1528 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1529 int serviced = IRQ_NONE;
1530 u32 temp;
1531
1532 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1533 temp = smsc911x_reg_read(pdata, INT_EN);
1534 temp &= (~INT_EN_SW_INT_EN_);
1535 smsc911x_reg_write(pdata, INT_EN, temp);
1536 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1537 pdata->software_irq_signal = 1;
1538 smp_wmb();
1539 serviced = IRQ_HANDLED;
1540 }
1541
1542 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1543 /* Called when there is a multicast update scheduled and
1544 * it is now safe to complete the update */
1545 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1546 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1547 if (pdata->multicast_update_pending)
1548 smsc911x_rx_multicast_update_workaround(pdata);
1549 serviced = IRQ_HANDLED;
1550 }
1551
1552 if (intsts & inten & INT_STS_TDFA_) {
1553 temp = smsc911x_reg_read(pdata, FIFO_INT);
1554 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1555 smsc911x_reg_write(pdata, FIFO_INT, temp);
1556 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1557 netif_wake_queue(dev);
1558 serviced = IRQ_HANDLED;
1559 }
1560
1561 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1562 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1563 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1564 serviced = IRQ_HANDLED;
1565 }
1566
1567 if (likely(intsts & inten & INT_STS_RSFL_)) {
1568 if (likely(napi_schedule_prep(&pdata->napi))) {
1569 /* Disable Rx interrupts */
1570 temp = smsc911x_reg_read(pdata, INT_EN);
1571 temp &= (~INT_EN_RSFL_EN_);
1572 smsc911x_reg_write(pdata, INT_EN, temp);
1573 /* Schedule a NAPI poll */
1574 __napi_schedule(&pdata->napi);
1575 } else {
1576 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1577 }
1578 serviced = IRQ_HANDLED;
1579 }
1580
1581 return serviced;
1582}
1583
1584static int smsc911x_open(struct net_device *dev)
1585{
1586 struct smsc911x_data *pdata = netdev_priv(dev);
1587 unsigned int timeout;
1588 unsigned int temp;
1589 unsigned int intcfg;
1590 int retval;
1591 int irq_flags;
1592
1593 /* find and start the given phy */
1594 if (!dev->phydev) {
1595 retval = smsc911x_mii_probe(dev);
1596 if (retval < 0) {
1597 SMSC_WARN(pdata, probe, "Error starting phy");
1598 goto out;
1599 }
1600 }
1601
1602 /* Reset the LAN911x */
1603 retval = smsc911x_soft_reset(pdata);
1604 if (retval) {
1605 SMSC_WARN(pdata, hw, "soft reset failed");
1606 goto mii_free_out;
1607 }
1608
1609 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1610 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1611
1612 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1613 spin_lock_irq(&pdata->mac_lock);
1614 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1615 spin_unlock_irq(&pdata->mac_lock);
1616
1617 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1618 timeout = 50;
1619 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1620 --timeout) {
1621 udelay(10);
1622 }
1623
1624 if (unlikely(timeout == 0))
1625 SMSC_WARN(pdata, ifup,
1626 "Timed out waiting for EEPROM busy bit to clear");
1627
1628 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1629
1630 /* The soft reset above cleared the device's MAC address,
1631 * restore it from local copy (set in probe) */
1632 spin_lock_irq(&pdata->mac_lock);
1633 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1634 spin_unlock_irq(&pdata->mac_lock);
1635
1636 /* Initialise irqs, but leave all sources disabled */
1637 smsc911x_disable_irq_chip(dev);
1638
1639 /* Set interrupt deassertion to 100uS */
1640 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1641
1642 if (pdata->config.irq_polarity) {
1643 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1644 intcfg |= INT_CFG_IRQ_POL_;
1645 } else {
1646 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1647 }
1648
1649 if (pdata->config.irq_type) {
1650 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1651 intcfg |= INT_CFG_IRQ_TYPE_;
1652 } else {
1653 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1654 }
1655
1656 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1657
1658 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1659 pdata->software_irq_signal = 0;
1660 smp_wmb();
1661
1662 irq_flags = irq_get_trigger_type(dev->irq);
1663 retval = request_irq(dev->irq, smsc911x_irqhandler,
1664 irq_flags | IRQF_SHARED, dev->name, dev);
1665 if (retval) {
1666 SMSC_WARN(pdata, probe,
1667 "Unable to claim requested irq: %d", dev->irq);
1668 goto mii_free_out;
1669 }
1670
1671 temp = smsc911x_reg_read(pdata, INT_EN);
1672 temp |= INT_EN_SW_INT_EN_;
1673 smsc911x_reg_write(pdata, INT_EN, temp);
1674
1675 timeout = 1000;
1676 while (timeout--) {
1677 if (pdata->software_irq_signal)
1678 break;
1679 msleep(1);
1680 }
1681
1682 if (!pdata->software_irq_signal) {
1683 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1684 dev->irq);
1685 retval = -ENODEV;
1686 goto irq_stop_out;
1687 }
1688 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1689 dev->irq);
1690
1691 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1692 (unsigned long)pdata->ioaddr, dev->irq);
1693
1694 /* Reset the last known duplex and carrier */
1695 pdata->last_duplex = -1;
1696 pdata->last_carrier = -1;
1697
1698 /* Bring the PHY up */
1699 phy_start(dev->phydev);
1700
1701 temp = smsc911x_reg_read(pdata, HW_CFG);
1702 /* Preserve TX FIFO size and external PHY configuration */
1703 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1704 temp |= HW_CFG_SF_;
1705 smsc911x_reg_write(pdata, HW_CFG, temp);
1706
1707 temp = smsc911x_reg_read(pdata, FIFO_INT);
1708 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1709 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1710 smsc911x_reg_write(pdata, FIFO_INT, temp);
1711
1712 /* set RX Data offset to 2 bytes for alignment */
1713 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1714
1715 /* enable NAPI polling before enabling RX interrupts */
1716 napi_enable(&pdata->napi);
1717
1718 temp = smsc911x_reg_read(pdata, INT_EN);
1719 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1720 smsc911x_reg_write(pdata, INT_EN, temp);
1721
1722 spin_lock_irq(&pdata->mac_lock);
1723 temp = smsc911x_mac_read(pdata, MAC_CR);
1724 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1725 smsc911x_mac_write(pdata, MAC_CR, temp);
1726 spin_unlock_irq(&pdata->mac_lock);
1727
1728 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1729
1730 netif_start_queue(dev);
1731 return 0;
1732
1733irq_stop_out:
1734 free_irq(dev->irq, dev);
1735mii_free_out:
1736 phy_disconnect(dev->phydev);
1737 dev->phydev = NULL;
1738out:
1739 return retval;
1740}
1741
1742/* Entry point for stopping the interface */
1743static int smsc911x_stop(struct net_device *dev)
1744{
1745 struct smsc911x_data *pdata = netdev_priv(dev);
1746 unsigned int temp;
1747
1748 /* Disable all device interrupts */
1749 temp = smsc911x_reg_read(pdata, INT_CFG);
1750 temp &= ~INT_CFG_IRQ_EN_;
1751 smsc911x_reg_write(pdata, INT_CFG, temp);
1752
1753 /* Stop Tx and Rx polling */
1754 netif_stop_queue(dev);
1755 napi_disable(&pdata->napi);
1756
1757 /* At this point all Rx and Tx activity is stopped */
1758 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1759 smsc911x_tx_update_txcounters(dev);
1760
1761 free_irq(dev->irq, dev);
1762
1763 /* Bring the PHY down */
1764 if (dev->phydev) {
1765 phy_stop(dev->phydev);
1766 phy_disconnect(dev->phydev);
1767 dev->phydev = NULL;
1768 }
1769 netif_carrier_off(dev);
1770
1771 SMSC_TRACE(pdata, ifdown, "Interface stopped");
1772 return 0;
1773}
1774
1775/* Entry point for transmitting a packet */
1776static netdev_tx_t
1777smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1778{
1779 struct smsc911x_data *pdata = netdev_priv(dev);
1780 unsigned int freespace;
1781 unsigned int tx_cmd_a;
1782 unsigned int tx_cmd_b;
1783 unsigned int temp;
1784 u32 wrsz;
1785 ulong bufp;
1786
1787 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1788
1789 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1790 SMSC_WARN(pdata, tx_err,
1791 "Tx data fifo low, space available: %d", freespace);
1792
1793 /* Word alignment adjustment */
1794 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1795 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1796 tx_cmd_a |= (unsigned int)skb->len;
1797
1798 tx_cmd_b = ((unsigned int)skb->len) << 16;
1799 tx_cmd_b |= (unsigned int)skb->len;
1800
1801 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1802 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1803
1804 bufp = (ulong)skb->data & (~0x3);
1805 wrsz = (u32)skb->len + 3;
1806 wrsz += (u32)((ulong)skb->data & 0x3);
1807 wrsz >>= 2;
1808
1809 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1810 freespace -= (skb->len + 32);
1811 skb_tx_timestamp(skb);
1812 dev_consume_skb_any(skb);
1813
1814 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1815 smsc911x_tx_update_txcounters(dev);
1816
1817 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1818 netif_stop_queue(dev);
1819 temp = smsc911x_reg_read(pdata, FIFO_INT);
1820 temp &= 0x00FFFFFF;
1821 temp |= 0x32000000;
1822 smsc911x_reg_write(pdata, FIFO_INT, temp);
1823 }
1824
1825 return NETDEV_TX_OK;
1826}
1827
1828/* Entry point for getting status counters */
1829static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1830{
1831 struct smsc911x_data *pdata = netdev_priv(dev);
1832 smsc911x_tx_update_txcounters(dev);
1833 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1834 return &dev->stats;
1835}
1836
1837/* Entry point for setting addressing modes */
1838static void smsc911x_set_multicast_list(struct net_device *dev)
1839{
1840 struct smsc911x_data *pdata = netdev_priv(dev);
1841 unsigned long flags;
1842
1843 if (dev->flags & IFF_PROMISC) {
1844 /* Enabling promiscuous mode */
1845 pdata->set_bits_mask = MAC_CR_PRMS_;
1846 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1847 pdata->hashhi = 0;
1848 pdata->hashlo = 0;
1849 } else if (dev->flags & IFF_ALLMULTI) {
1850 /* Enabling all multicast mode */
1851 pdata->set_bits_mask = MAC_CR_MCPAS_;
1852 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1853 pdata->hashhi = 0;
1854 pdata->hashlo = 0;
1855 } else if (!netdev_mc_empty(dev)) {
1856 /* Enabling specific multicast addresses */
1857 unsigned int hash_high = 0;
1858 unsigned int hash_low = 0;
1859 struct netdev_hw_addr *ha;
1860
1861 pdata->set_bits_mask = MAC_CR_HPFILT_;
1862 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1863
1864 netdev_for_each_mc_addr(ha, dev) {
1865 unsigned int bitnum = smsc911x_hash(ha->addr);
1866 unsigned int mask = 0x01 << (bitnum & 0x1F);
1867
1868 if (bitnum & 0x20)
1869 hash_high |= mask;
1870 else
1871 hash_low |= mask;
1872 }
1873
1874 pdata->hashhi = hash_high;
1875 pdata->hashlo = hash_low;
1876 } else {
1877 /* Enabling local MAC address only */
1878 pdata->set_bits_mask = 0;
1879 pdata->clear_bits_mask =
1880 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1881 pdata->hashhi = 0;
1882 pdata->hashlo = 0;
1883 }
1884
1885 spin_lock_irqsave(&pdata->mac_lock, flags);
1886
1887 if (pdata->generation <= 1) {
1888 /* Older hardware revision - cannot change these flags while
1889 * receiving data */
1890 if (!pdata->multicast_update_pending) {
1891 unsigned int temp;
1892 SMSC_TRACE(pdata, hw, "scheduling mcast update");
1893 pdata->multicast_update_pending = 1;
1894
1895 /* Request the hardware to stop, then perform the
1896 * update when we get an RX_STOP interrupt */
1897 temp = smsc911x_mac_read(pdata, MAC_CR);
1898 temp &= ~(MAC_CR_RXEN_);
1899 smsc911x_mac_write(pdata, MAC_CR, temp);
1900 } else {
1901 /* There is another update pending, this should now
1902 * use the newer values */
1903 }
1904 } else {
1905 /* Newer hardware revision - can write immediately */
1906 smsc911x_rx_multicast_update(pdata);
1907 }
1908
1909 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1910}
1911
1912#ifdef CONFIG_NET_POLL_CONTROLLER
1913static void smsc911x_poll_controller(struct net_device *dev)
1914{
1915 disable_irq(dev->irq);
1916 smsc911x_irqhandler(0, dev);
1917 enable_irq(dev->irq);
1918}
1919#endif /* CONFIG_NET_POLL_CONTROLLER */
1920
1921static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1922{
1923 struct smsc911x_data *pdata = netdev_priv(dev);
1924 struct sockaddr *addr = p;
1925
1926 /* On older hardware revisions we cannot change the mac address
1927 * registers while receiving data. Newer devices can safely change
1928 * this at any time. */
1929 if (pdata->generation <= 1 && netif_running(dev))
1930 return -EBUSY;
1931
1932 if (!is_valid_ether_addr(addr->sa_data))
1933 return -EADDRNOTAVAIL;
1934
1935 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1936
1937 spin_lock_irq(&pdata->mac_lock);
1938 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1939 spin_unlock_irq(&pdata->mac_lock);
1940
1941 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1942
1943 return 0;
1944}
1945
1946/* Standard ioctls for mii-tool */
1947static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1948{
1949 if (!netif_running(dev) || !dev->phydev)
1950 return -EINVAL;
1951
1952 return phy_mii_ioctl(dev->phydev, ifr, cmd);
1953}
1954
1955static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1956 struct ethtool_drvinfo *info)
1957{
1958 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1959 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1960 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1961 sizeof(info->bus_info));
1962}
1963
1964static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1965{
1966 struct smsc911x_data *pdata = netdev_priv(dev);
1967 return pdata->msg_enable;
1968}
1969
1970static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1971{
1972 struct smsc911x_data *pdata = netdev_priv(dev);
1973 pdata->msg_enable = level;
1974}
1975
1976static int smsc911x_ethtool_getregslen(struct net_device *dev)
1977{
1978 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1979 sizeof(u32);
1980}
1981
1982static void
1983smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1984 void *buf)
1985{
1986 struct smsc911x_data *pdata = netdev_priv(dev);
1987 struct phy_device *phy_dev = dev->phydev;
1988 unsigned long flags;
1989 unsigned int i;
1990 unsigned int j = 0;
1991 u32 *data = buf;
1992
1993 regs->version = pdata->idrev;
1994 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
1995 data[j++] = smsc911x_reg_read(pdata, i);
1996
1997 for (i = MAC_CR; i <= WUCSR; i++) {
1998 spin_lock_irqsave(&pdata->mac_lock, flags);
1999 data[j++] = smsc911x_mac_read(pdata, i);
2000 spin_unlock_irqrestore(&pdata->mac_lock, flags);
2001 }
2002
2003 for (i = 0; i <= 31; i++)
2004 data[j++] = smsc911x_mii_read(phy_dev->mdio.bus,
2005 phy_dev->mdio.addr, i);
2006}
2007
2008static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
2009{
2010 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2011 temp &= ~GPIO_CFG_EEPR_EN_;
2012 smsc911x_reg_write(pdata, GPIO_CFG, temp);
2013 msleep(1);
2014}
2015
2016static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2017{
2018 int timeout = 100;
2019 u32 e2cmd;
2020
2021 SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2022 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2023 SMSC_WARN(pdata, drv, "Busy at start");
2024 return -EBUSY;
2025 }
2026
2027 e2cmd = op | E2P_CMD_EPC_BUSY_;
2028 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2029
2030 do {
2031 msleep(1);
2032 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2033 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2034
2035 if (!timeout) {
2036 SMSC_TRACE(pdata, drv, "TIMED OUT");
2037 return -EAGAIN;
2038 }
2039
2040 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2041 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2042 return -EINVAL;
2043 }
2044
2045 return 0;
2046}
2047
2048static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2049 u8 address, u8 *data)
2050{
2051 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2052 int ret;
2053
2054 SMSC_TRACE(pdata, drv, "address 0x%x", address);
2055 ret = smsc911x_eeprom_send_cmd(pdata, op);
2056
2057 if (!ret)
2058 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2059
2060 return ret;
2061}
2062
2063static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2064 u8 address, u8 data)
2065{
2066 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2067 u32 temp;
2068 int ret;
2069
2070 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2071 ret = smsc911x_eeprom_send_cmd(pdata, op);
2072
2073 if (!ret) {
2074 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2075 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2076
2077 /* Workaround for hardware read-after-write restriction */
2078 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2079
2080 ret = smsc911x_eeprom_send_cmd(pdata, op);
2081 }
2082
2083 return ret;
2084}
2085
2086static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2087{
2088 return SMSC911X_EEPROM_SIZE;
2089}
2090
2091static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2092 struct ethtool_eeprom *eeprom, u8 *data)
2093{
2094 struct smsc911x_data *pdata = netdev_priv(dev);
2095 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2096 int len;
2097 int i;
2098
2099 smsc911x_eeprom_enable_access(pdata);
2100
2101 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2102 for (i = 0; i < len; i++) {
2103 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2104 if (ret < 0) {
2105 eeprom->len = 0;
2106 return ret;
2107 }
2108 }
2109
2110 memcpy(data, &eeprom_data[eeprom->offset], len);
2111 eeprom->len = len;
2112 return 0;
2113}
2114
2115static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2116 struct ethtool_eeprom *eeprom, u8 *data)
2117{
2118 int ret;
2119 struct smsc911x_data *pdata = netdev_priv(dev);
2120
2121 smsc911x_eeprom_enable_access(pdata);
2122 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2123 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2124 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2125
2126 /* Single byte write, according to man page */
2127 eeprom->len = 1;
2128
2129 return ret;
2130}
2131
2132static const struct ethtool_ops smsc911x_ethtool_ops = {
2133 .get_link = ethtool_op_get_link,
2134 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2135 .nway_reset = phy_ethtool_nway_reset,
2136 .get_msglevel = smsc911x_ethtool_getmsglevel,
2137 .set_msglevel = smsc911x_ethtool_setmsglevel,
2138 .get_regs_len = smsc911x_ethtool_getregslen,
2139 .get_regs = smsc911x_ethtool_getregs,
2140 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2141 .get_eeprom = smsc911x_ethtool_get_eeprom,
2142 .set_eeprom = smsc911x_ethtool_set_eeprom,
2143 .get_ts_info = ethtool_op_get_ts_info,
2144 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2145 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2146};
2147
2148static const struct net_device_ops smsc911x_netdev_ops = {
2149 .ndo_open = smsc911x_open,
2150 .ndo_stop = smsc911x_stop,
2151 .ndo_start_xmit = smsc911x_hard_start_xmit,
2152 .ndo_get_stats = smsc911x_get_stats,
2153 .ndo_set_rx_mode = smsc911x_set_multicast_list,
2154 .ndo_do_ioctl = smsc911x_do_ioctl,
2155 .ndo_validate_addr = eth_validate_addr,
2156 .ndo_set_mac_address = smsc911x_set_mac_address,
2157#ifdef CONFIG_NET_POLL_CONTROLLER
2158 .ndo_poll_controller = smsc911x_poll_controller,
2159#endif
2160};
2161
2162/* copies the current mac address from hardware to dev->dev_addr */
2163static void smsc911x_read_mac_address(struct net_device *dev)
2164{
2165 struct smsc911x_data *pdata = netdev_priv(dev);
2166 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2167 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2168
2169 dev->dev_addr[0] = (u8)(mac_low32);
2170 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2171 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2172 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2173 dev->dev_addr[4] = (u8)(mac_high16);
2174 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2175}
2176
2177/* Initializing private device structures, only called from probe */
2178static int smsc911x_init(struct net_device *dev)
2179{
2180 struct smsc911x_data *pdata = netdev_priv(dev);
2181 unsigned int byte_test, mask;
2182 unsigned int to = 100;
2183
2184 SMSC_TRACE(pdata, probe, "Driver Parameters:");
2185 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2186 (unsigned long)pdata->ioaddr);
2187 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2188 SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2189
2190 spin_lock_init(&pdata->dev_lock);
2191 spin_lock_init(&pdata->mac_lock);
2192
2193 if (pdata->ioaddr == NULL) {
2194 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2195 return -ENODEV;
2196 }
2197
2198 /*
2199 * poll the READY bit in PMT_CTRL. Any other access to the device is
2200 * forbidden while this bit isn't set. Try for 100ms
2201 *
2202 * Note that this test is done before the WORD_SWAP register is
2203 * programmed. So in some configurations the READY bit is at 16 before
2204 * WORD_SWAP is written to. This issue is worked around by waiting
2205 * until either bit 0 or bit 16 gets set in PMT_CTRL.
2206 *
2207 * SMSC has confirmed that checking bit 16 (marked as reserved in
2208 * the datasheet) is fine since these bits "will either never be set
2209 * or can only go high after READY does (so also indicate the device
2210 * is ready)".
2211 */
2212
2213 mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2214 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2215 udelay(1000);
2216
2217 if (to == 0) {
2218 netdev_err(dev, "Device not READY in 100ms aborting\n");
2219 return -ENODEV;
2220 }
2221
2222 /* Check byte ordering */
2223 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2224 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2225 if (byte_test == 0x43218765) {
2226 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2227 "applying WORD_SWAP");
2228 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2229
2230 /* 1 dummy read of BYTE_TEST is needed after a write to
2231 * WORD_SWAP before its contents are valid */
2232 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2233
2234 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2235 }
2236
2237 if (byte_test != 0x87654321) {
2238 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2239 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2240 SMSC_WARN(pdata, probe,
2241 "top 16 bits equal to bottom 16 bits");
2242 SMSC_TRACE(pdata, probe,
2243 "This may mean the chip is set "
2244 "for 32 bit while the bus is reading 16 bit");
2245 }
2246 return -ENODEV;
2247 }
2248
2249 /* Default generation to zero (all workarounds apply) */
2250 pdata->generation = 0;
2251
2252 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2253 switch (pdata->idrev & 0xFFFF0000) {
2254 case LAN9118:
2255 case LAN9117:
2256 case LAN9116:
2257 case LAN9115:
2258 case LAN89218:
2259 /* LAN911[5678] family */
2260 pdata->generation = pdata->idrev & 0x0000FFFF;
2261 break;
2262
2263 case LAN9218:
2264 case LAN9217:
2265 case LAN9216:
2266 case LAN9215:
2267 /* LAN921[5678] family */
2268 pdata->generation = 3;
2269 break;
2270
2271 case LAN9210:
2272 case LAN9211:
2273 case LAN9220:
2274 case LAN9221:
2275 case LAN9250:
2276 /* LAN9210/LAN9211/LAN9220/LAN9221/LAN9250 */
2277 pdata->generation = 4;
2278 break;
2279
2280 default:
2281 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2282 pdata->idrev);
2283 return -ENODEV;
2284 }
2285
2286 SMSC_TRACE(pdata, probe,
2287 "LAN911x identified, idrev: 0x%08X, generation: %d",
2288 pdata->idrev, pdata->generation);
2289
2290 if (pdata->generation == 0)
2291 SMSC_WARN(pdata, probe,
2292 "This driver is not intended for this chip revision");
2293
2294 /* workaround for platforms without an eeprom, where the mac address
2295 * is stored elsewhere and set by the bootloader. This saves the
2296 * mac address before resetting the device */
2297 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2298 spin_lock_irq(&pdata->mac_lock);
2299 smsc911x_read_mac_address(dev);
2300 spin_unlock_irq(&pdata->mac_lock);
2301 }
2302
2303 /* Reset the LAN911x */
2304 if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
2305 return -ENODEV;
2306
2307 dev->flags |= IFF_MULTICAST;
2308 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2309 dev->netdev_ops = &smsc911x_netdev_ops;
2310 dev->ethtool_ops = &smsc911x_ethtool_ops;
2311
2312 return 0;
2313}
2314
2315static int smsc911x_drv_remove(struct platform_device *pdev)
2316{
2317 struct net_device *dev;
2318 struct smsc911x_data *pdata;
2319 struct resource *res;
2320
2321 dev = platform_get_drvdata(pdev);
2322 BUG_ON(!dev);
2323 pdata = netdev_priv(dev);
2324 BUG_ON(!pdata);
2325 BUG_ON(!pdata->ioaddr);
2326
2327 SMSC_TRACE(pdata, ifdown, "Stopping driver");
2328
2329 unregister_netdev(dev);
2330
2331 mdiobus_unregister(pdata->mii_bus);
2332 mdiobus_free(pdata->mii_bus);
2333
2334 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2335 "smsc911x-memory");
2336 if (!res)
2337 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2338
2339 release_mem_region(res->start, resource_size(res));
2340
2341 iounmap(pdata->ioaddr);
2342
2343 (void)smsc911x_disable_resources(pdev);
2344 smsc911x_free_resources(pdev);
2345
2346 free_netdev(dev);
2347
2348 pm_runtime_put(&pdev->dev);
2349 pm_runtime_disable(&pdev->dev);
2350
2351 return 0;
2352}
2353
2354/* standard register acces */
2355static const struct smsc911x_ops standard_smsc911x_ops = {
2356 .reg_read = __smsc911x_reg_read,
2357 .reg_write = __smsc911x_reg_write,
2358 .rx_readfifo = smsc911x_rx_readfifo,
2359 .tx_writefifo = smsc911x_tx_writefifo,
2360};
2361
2362/* shifted register access */
2363static const struct smsc911x_ops shifted_smsc911x_ops = {
2364 .reg_read = __smsc911x_reg_read_shift,
2365 .reg_write = __smsc911x_reg_write_shift,
2366 .rx_readfifo = smsc911x_rx_readfifo_shift,
2367 .tx_writefifo = smsc911x_tx_writefifo_shift,
2368};
2369
2370static int smsc911x_probe_config(struct smsc911x_platform_config *config,
2371 struct device *dev)
2372{
2373 int phy_interface;
2374 u32 width = 0;
2375 int err;
2376
2377 phy_interface = device_get_phy_mode(dev);
2378 if (phy_interface < 0)
2379 phy_interface = PHY_INTERFACE_MODE_NA;
2380 config->phy_interface = phy_interface;
2381
2382 device_get_mac_address(dev, config->mac, ETH_ALEN);
2383
2384 err = device_property_read_u32(dev, "reg-io-width", &width);
2385 if (err == -ENXIO)
2386 return err;
2387 if (!err && width == 4)
2388 config->flags |= SMSC911X_USE_32BIT;
2389 else
2390 config->flags |= SMSC911X_USE_16BIT;
2391
2392 device_property_read_u32(dev, "reg-shift", &config->shift);
2393
2394 if (device_property_present(dev, "smsc,irq-active-high"))
2395 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2396
2397 if (device_property_present(dev, "smsc,irq-push-pull"))
2398 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2399
2400 if (device_property_present(dev, "smsc,force-internal-phy"))
2401 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2402
2403 if (device_property_present(dev, "smsc,force-external-phy"))
2404 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2405
2406 if (device_property_present(dev, "smsc,save-mac-address"))
2407 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2408
2409 return 0;
2410}
2411
2412static int smsc911x_drv_probe(struct platform_device *pdev)
2413{
2414 struct net_device *dev;
2415 struct smsc911x_data *pdata;
2416 struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2417 struct resource *res;
2418 int res_size, irq;
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 = platform_get_irq(pdev, 0);
2433 if (irq == -EPROBE_DEFER) {
2434 retval = -EPROBE_DEFER;
2435 goto out_0;
2436 } else if (irq <= 0) {
2437 pr_warn("Could not allocate irq resource\n");
2438 retval = -ENODEV;
2439 goto out_0;
2440 }
2441
2442 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2443 retval = -EBUSY;
2444 goto out_0;
2445 }
2446
2447 dev = alloc_etherdev(sizeof(struct smsc911x_data));
2448 if (!dev) {
2449 retval = -ENOMEM;
2450 goto out_release_io_1;
2451 }
2452
2453 SET_NETDEV_DEV(dev, &pdev->dev);
2454
2455 pdata = netdev_priv(dev);
2456 dev->irq = irq;
2457 pdata->ioaddr = ioremap_nocache(res->start, res_size);
2458 if (!pdata->ioaddr) {
2459 retval = -ENOMEM;
2460 goto out_ioremap_fail;
2461 }
2462
2463 pdata->dev = dev;
2464 pdata->msg_enable = ((1 << debug) - 1);
2465
2466 platform_set_drvdata(pdev, dev);
2467
2468 retval = smsc911x_request_resources(pdev);
2469 if (retval)
2470 goto out_request_resources_fail;
2471
2472 retval = smsc911x_enable_resources(pdev);
2473 if (retval)
2474 goto out_enable_resources_fail;
2475
2476 if (pdata->ioaddr == NULL) {
2477 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2478 retval = -ENOMEM;
2479 goto out_disable_resources;
2480 }
2481
2482 retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
2483 if (retval && config) {
2484 /* copy config parameters across to pdata */
2485 memcpy(&pdata->config, config, sizeof(pdata->config));
2486 retval = 0;
2487 }
2488
2489 if (retval) {
2490 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2491 goto out_disable_resources;
2492 }
2493
2494 /* assume standard, non-shifted, access to HW registers */
2495 pdata->ops = &standard_smsc911x_ops;
2496 /* apply the right access if shifting is needed */
2497 if (pdata->config.shift)
2498 pdata->ops = &shifted_smsc911x_ops;
2499
2500 pm_runtime_enable(&pdev->dev);
2501 pm_runtime_get_sync(&pdev->dev);
2502
2503 retval = smsc911x_init(dev);
2504 if (retval < 0)
2505 goto out_disable_resources;
2506
2507 netif_carrier_off(dev);
2508
2509 retval = smsc911x_mii_init(pdev, dev);
2510 if (retval) {
2511 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2512 goto out_disable_resources;
2513 }
2514
2515 retval = register_netdev(dev);
2516 if (retval) {
2517 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2518 goto out_disable_resources;
2519 } else {
2520 SMSC_TRACE(pdata, probe,
2521 "Network interface: \"%s\"", dev->name);
2522 }
2523
2524 spin_lock_irq(&pdata->mac_lock);
2525
2526 /* Check if mac address has been specified when bringing interface up */
2527 if (is_valid_ether_addr(dev->dev_addr)) {
2528 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2529 SMSC_TRACE(pdata, probe,
2530 "MAC Address is specified by configuration");
2531 } else if (is_valid_ether_addr(pdata->config.mac)) {
2532 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2533 SMSC_TRACE(pdata, probe,
2534 "MAC Address specified by platform data");
2535 } else {
2536 /* Try reading mac address from device. if EEPROM is present
2537 * it will already have been set */
2538 smsc_get_mac(dev);
2539
2540 if (is_valid_ether_addr(dev->dev_addr)) {
2541 /* eeprom values are valid so use them */
2542 SMSC_TRACE(pdata, probe,
2543 "Mac Address is read from LAN911x EEPROM");
2544 } else {
2545 /* eeprom values are invalid, generate random MAC */
2546 eth_hw_addr_random(dev);
2547 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2548 SMSC_TRACE(pdata, probe,
2549 "MAC Address is set to eth_random_addr");
2550 }
2551 }
2552
2553 spin_unlock_irq(&pdata->mac_lock);
2554
2555 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2556
2557 return 0;
2558
2559out_disable_resources:
2560 pm_runtime_put(&pdev->dev);
2561 pm_runtime_disable(&pdev->dev);
2562 (void)smsc911x_disable_resources(pdev);
2563out_enable_resources_fail:
2564 smsc911x_free_resources(pdev);
2565out_request_resources_fail:
2566 iounmap(pdata->ioaddr);
2567out_ioremap_fail:
2568 free_netdev(dev);
2569out_release_io_1:
2570 release_mem_region(res->start, resource_size(res));
2571out_0:
2572 return retval;
2573}
2574
2575#ifdef CONFIG_PM
2576/* This implementation assumes the devices remains powered on its VDDVARIO
2577 * pins during suspend. */
2578
2579/* TODO: implement freeze/thaw callbacks for hibernation.*/
2580
2581static int smsc911x_suspend(struct device *dev)
2582{
2583 struct net_device *ndev = dev_get_drvdata(dev);
2584 struct smsc911x_data *pdata = netdev_priv(ndev);
2585
2586 if (netif_running(ndev)) {
2587 netif_stop_queue(ndev);
2588 netif_device_detach(ndev);
2589 }
2590
2591 /* enable wake on LAN, energy detection and the external PME
2592 * signal. */
2593 smsc911x_reg_write(pdata, PMT_CTRL,
2594 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2595 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2596
2597 pm_runtime_disable(dev);
2598 pm_runtime_set_suspended(dev);
2599
2600 return 0;
2601}
2602
2603static int smsc911x_resume(struct device *dev)
2604{
2605 struct net_device *ndev = dev_get_drvdata(dev);
2606 struct smsc911x_data *pdata = netdev_priv(ndev);
2607 unsigned int to = 100;
2608
2609 pm_runtime_enable(dev);
2610 pm_runtime_resume(dev);
2611
2612 /* Note 3.11 from the datasheet:
2613 * "When the LAN9220 is in a power saving state, a write of any
2614 * data to the BYTE_TEST register will wake-up the device."
2615 */
2616 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2617
2618 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2619 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2620 * if it failed. */
2621 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2622 udelay(1000);
2623
2624 if (to == 0)
2625 return -EIO;
2626
2627 if (netif_running(ndev)) {
2628 netif_device_attach(ndev);
2629 netif_start_queue(ndev);
2630 }
2631
2632 return 0;
2633}
2634
2635static const struct dev_pm_ops smsc911x_pm_ops = {
2636 .suspend = smsc911x_suspend,
2637 .resume = smsc911x_resume,
2638};
2639
2640#define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2641
2642#else
2643#define SMSC911X_PM_OPS NULL
2644#endif
2645
2646#ifdef CONFIG_OF
2647static const struct of_device_id smsc911x_dt_ids[] = {
2648 { .compatible = "smsc,lan9115", },
2649 { /* sentinel */ }
2650};
2651MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2652#endif
2653
2654static const struct acpi_device_id smsc911x_acpi_match[] = {
2655 { "ARMH9118", 0 },
2656 { }
2657};
2658MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
2659
2660static struct platform_driver smsc911x_driver = {
2661 .probe = smsc911x_drv_probe,
2662 .remove = smsc911x_drv_remove,
2663 .driver = {
2664 .name = SMSC_CHIPNAME,
2665 .pm = SMSC911X_PM_OPS,
2666 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2667 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
2668 },
2669};
2670
2671/* Entry point for loading the module */
2672static int __init smsc911x_init_module(void)
2673{
2674 SMSC_INITIALIZE();
2675 return platform_driver_register(&smsc911x_driver);
2676}
2677
2678/* entry point for unloading the module */
2679static void __exit smsc911x_cleanup_module(void)
2680{
2681 platform_driver_unregister(&smsc911x_driver);
2682}
2683
2684module_init(smsc911x_init_module);
2685module_exit(smsc911x_cleanup_module);