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[mirror_ubuntu-artful-kernel.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,LAN9250
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 <linux/acpi.h>
63 #include <linux/pm_runtime.h>
64 #include <linux/property.h>
65 #include <linux/gpio/consumer.h>
66
67 #include "smsc911x.h"
68
69 #define SMSC_CHIPNAME "smsc911x"
70 #define SMSC_MDIONAME "smsc911x-mdio"
71 #define SMSC_DRV_VERSION "2008-10-21"
72
73 MODULE_LICENSE("GPL");
74 MODULE_VERSION(SMSC_DRV_VERSION);
75 MODULE_ALIAS("platform:smsc911x");
76
77 #if USE_DEBUG > 0
78 static int debug = 16;
79 #else
80 static int debug = 3;
81 #endif
82
83 module_param(debug, int, 0);
84 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
85
86 struct smsc911x_data;
87
88 struct smsc911x_ops {
89 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
90 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
91 void (*rx_readfifo)(struct smsc911x_data *pdata,
92 unsigned int *buf, unsigned int wordcount);
93 void (*tx_writefifo)(struct smsc911x_data *pdata,
94 unsigned int *buf, unsigned int wordcount);
95 };
96
97 #define SMSC911X_NUM_SUPPLIES 2
98
99 struct smsc911x_data {
100 void __iomem *ioaddr;
101
102 unsigned int idrev;
103
104 /* used to decide which workarounds apply */
105 unsigned int generation;
106
107 /* device configuration (copied from platform_data during probe) */
108 struct smsc911x_platform_config config;
109
110 /* This needs to be acquired before calling any of below:
111 * smsc911x_mac_read(), smsc911x_mac_write()
112 */
113 spinlock_t mac_lock;
114
115 /* spinlock to ensure register accesses are serialised */
116 spinlock_t dev_lock;
117
118 struct mii_bus *mii_bus;
119 unsigned int using_extphy;
120 int last_duplex;
121 int last_carrier;
122
123 u32 msg_enable;
124 unsigned int gpio_setting;
125 unsigned int gpio_orig_setting;
126 struct net_device *dev;
127 struct napi_struct napi;
128
129 unsigned int software_irq_signal;
130
131 #ifdef USE_PHY_WORK_AROUND
132 #define MIN_PACKET_SIZE (64)
133 char loopback_tx_pkt[MIN_PACKET_SIZE];
134 char loopback_rx_pkt[MIN_PACKET_SIZE];
135 unsigned int resetcount;
136 #endif
137
138 /* Members for Multicast filter workaround */
139 unsigned int multicast_update_pending;
140 unsigned int set_bits_mask;
141 unsigned int clear_bits_mask;
142 unsigned int hashhi;
143 unsigned int hashlo;
144
145 /* register access functions */
146 const struct smsc911x_ops *ops;
147
148 /* regulators */
149 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
150
151 /* Reset GPIO */
152 struct gpio_desc *reset_gpiod;
153
154 /* clock */
155 struct clk *clk;
156 };
157
158 /* Easy access to information */
159 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
160
161 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
162 {
163 if (pdata->config.flags & SMSC911X_USE_32BIT)
164 return readl(pdata->ioaddr + reg);
165
166 if (pdata->config.flags & SMSC911X_USE_16BIT)
167 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
168 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
169
170 BUG();
171 return 0;
172 }
173
174 static inline u32
175 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
176 {
177 if (pdata->config.flags & SMSC911X_USE_32BIT)
178 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
179
180 if (pdata->config.flags & SMSC911X_USE_16BIT)
181 return (readw(pdata->ioaddr +
182 __smsc_shift(pdata, reg)) & 0xFFFF) |
183 ((readw(pdata->ioaddr +
184 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
185
186 BUG();
187 return 0;
188 }
189
190 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
191 {
192 u32 data;
193 unsigned long flags;
194
195 spin_lock_irqsave(&pdata->dev_lock, flags);
196 data = pdata->ops->reg_read(pdata, reg);
197 spin_unlock_irqrestore(&pdata->dev_lock, flags);
198
199 return data;
200 }
201
202 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
203 u32 val)
204 {
205 if (pdata->config.flags & SMSC911X_USE_32BIT) {
206 writel(val, pdata->ioaddr + reg);
207 return;
208 }
209
210 if (pdata->config.flags & SMSC911X_USE_16BIT) {
211 writew(val & 0xFFFF, pdata->ioaddr + reg);
212 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
213 return;
214 }
215
216 BUG();
217 }
218
219 static inline void
220 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
221 {
222 if (pdata->config.flags & SMSC911X_USE_32BIT) {
223 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
224 return;
225 }
226
227 if (pdata->config.flags & SMSC911X_USE_16BIT) {
228 writew(val & 0xFFFF,
229 pdata->ioaddr + __smsc_shift(pdata, reg));
230 writew((val >> 16) & 0xFFFF,
231 pdata->ioaddr + __smsc_shift(pdata, reg + 2));
232 return;
233 }
234
235 BUG();
236 }
237
238 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
239 u32 val)
240 {
241 unsigned long flags;
242
243 spin_lock_irqsave(&pdata->dev_lock, flags);
244 pdata->ops->reg_write(pdata, reg, val);
245 spin_unlock_irqrestore(&pdata->dev_lock, flags);
246 }
247
248 /* Writes a packet to the TX_DATA_FIFO */
249 static inline void
250 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
251 unsigned int wordcount)
252 {
253 unsigned long flags;
254
255 spin_lock_irqsave(&pdata->dev_lock, flags);
256
257 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
258 while (wordcount--)
259 __smsc911x_reg_write(pdata, TX_DATA_FIFO,
260 swab32(*buf++));
261 goto out;
262 }
263
264 if (pdata->config.flags & SMSC911X_USE_32BIT) {
265 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
266 goto out;
267 }
268
269 if (pdata->config.flags & SMSC911X_USE_16BIT) {
270 while (wordcount--)
271 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
272 goto out;
273 }
274
275 BUG();
276 out:
277 spin_unlock_irqrestore(&pdata->dev_lock, flags);
278 }
279
280 /* Writes a packet to the TX_DATA_FIFO - shifted version */
281 static inline void
282 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
283 unsigned int wordcount)
284 {
285 unsigned long flags;
286
287 spin_lock_irqsave(&pdata->dev_lock, flags);
288
289 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
290 while (wordcount--)
291 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
292 swab32(*buf++));
293 goto out;
294 }
295
296 if (pdata->config.flags & SMSC911X_USE_32BIT) {
297 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
298 TX_DATA_FIFO), buf, wordcount);
299 goto out;
300 }
301
302 if (pdata->config.flags & SMSC911X_USE_16BIT) {
303 while (wordcount--)
304 __smsc911x_reg_write_shift(pdata,
305 TX_DATA_FIFO, *buf++);
306 goto out;
307 }
308
309 BUG();
310 out:
311 spin_unlock_irqrestore(&pdata->dev_lock, flags);
312 }
313
314 /* Reads a packet out of the RX_DATA_FIFO */
315 static inline void
316 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
317 unsigned int wordcount)
318 {
319 unsigned long flags;
320
321 spin_lock_irqsave(&pdata->dev_lock, flags);
322
323 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
324 while (wordcount--)
325 *buf++ = swab32(__smsc911x_reg_read(pdata,
326 RX_DATA_FIFO));
327 goto out;
328 }
329
330 if (pdata->config.flags & SMSC911X_USE_32BIT) {
331 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
332 goto out;
333 }
334
335 if (pdata->config.flags & SMSC911X_USE_16BIT) {
336 while (wordcount--)
337 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
338 goto out;
339 }
340
341 BUG();
342 out:
343 spin_unlock_irqrestore(&pdata->dev_lock, flags);
344 }
345
346 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
347 static inline void
348 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
349 unsigned int wordcount)
350 {
351 unsigned long flags;
352
353 spin_lock_irqsave(&pdata->dev_lock, flags);
354
355 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
356 while (wordcount--)
357 *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
358 RX_DATA_FIFO));
359 goto out;
360 }
361
362 if (pdata->config.flags & SMSC911X_USE_32BIT) {
363 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
364 RX_DATA_FIFO), buf, wordcount);
365 goto out;
366 }
367
368 if (pdata->config.flags & SMSC911X_USE_16BIT) {
369 while (wordcount--)
370 *buf++ = __smsc911x_reg_read_shift(pdata,
371 RX_DATA_FIFO);
372 goto out;
373 }
374
375 BUG();
376 out:
377 spin_unlock_irqrestore(&pdata->dev_lock, flags);
378 }
379
380 /*
381 * enable regulator and clock resources.
382 */
383 static int smsc911x_enable_resources(struct platform_device *pdev)
384 {
385 struct net_device *ndev = platform_get_drvdata(pdev);
386 struct smsc911x_data *pdata = netdev_priv(ndev);
387 int ret = 0;
388
389 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
390 pdata->supplies);
391 if (ret)
392 netdev_err(ndev, "failed to enable regulators %d\n",
393 ret);
394
395 if (!IS_ERR(pdata->clk)) {
396 ret = clk_prepare_enable(pdata->clk);
397 if (ret < 0)
398 netdev_err(ndev, "failed to enable clock %d\n", ret);
399 }
400
401 return ret;
402 }
403
404 /*
405 * disable resources, currently just regulators.
406 */
407 static int smsc911x_disable_resources(struct platform_device *pdev)
408 {
409 struct net_device *ndev = platform_get_drvdata(pdev);
410 struct smsc911x_data *pdata = netdev_priv(ndev);
411 int ret = 0;
412
413 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
414 pdata->supplies);
415
416 if (!IS_ERR(pdata->clk))
417 clk_disable_unprepare(pdata->clk);
418
419 return ret;
420 }
421
422 /*
423 * Request resources, currently just regulators.
424 *
425 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
426 * these are not always-on we need to request regulators to be turned on
427 * before we can try to access the device registers.
428 */
429 static int smsc911x_request_resources(struct platform_device *pdev)
430 {
431 struct net_device *ndev = platform_get_drvdata(pdev);
432 struct smsc911x_data *pdata = netdev_priv(ndev);
433 int ret = 0;
434
435 /* Request regulators */
436 pdata->supplies[0].supply = "vdd33a";
437 pdata->supplies[1].supply = "vddvario";
438 ret = regulator_bulk_get(&pdev->dev,
439 ARRAY_SIZE(pdata->supplies),
440 pdata->supplies);
441 if (ret) {
442 /*
443 * Retry on deferrals, else just report the error
444 * and try to continue.
445 */
446 if (ret == -EPROBE_DEFER)
447 return ret;
448 netdev_err(ndev, "couldn't get regulators %d\n",
449 ret);
450 }
451
452 /* Request optional RESET GPIO */
453 pdata->reset_gpiod = devm_gpiod_get_optional(&pdev->dev,
454 "reset",
455 GPIOD_OUT_LOW);
456
457 /* Request clock */
458 pdata->clk = clk_get(&pdev->dev, NULL);
459 if (IS_ERR(pdata->clk))
460 dev_dbg(&pdev->dev, "couldn't get clock %li\n",
461 PTR_ERR(pdata->clk));
462
463 return ret;
464 }
465
466 /*
467 * Free resources, currently just regulators.
468 *
469 */
470 static void smsc911x_free_resources(struct platform_device *pdev)
471 {
472 struct net_device *ndev = platform_get_drvdata(pdev);
473 struct smsc911x_data *pdata = netdev_priv(ndev);
474
475 /* Free regulators */
476 regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
477 pdata->supplies);
478
479 /* Free clock */
480 if (!IS_ERR(pdata->clk)) {
481 clk_put(pdata->clk);
482 pdata->clk = NULL;
483 }
484 }
485
486 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
487 * and smsc911x_mac_write, so assumes mac_lock is held */
488 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
489 {
490 int i;
491 u32 val;
492
493 SMSC_ASSERT_MAC_LOCK(pdata);
494
495 for (i = 0; i < 40; i++) {
496 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
497 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
498 return 0;
499 }
500 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
501 "MAC_CSR_CMD: 0x%08X", val);
502 return -EIO;
503 }
504
505 /* Fetches a MAC register value. Assumes mac_lock is acquired */
506 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
507 {
508 unsigned int temp;
509
510 SMSC_ASSERT_MAC_LOCK(pdata);
511
512 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
513 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
514 SMSC_WARN(pdata, hw, "MAC busy at entry");
515 return 0xFFFFFFFF;
516 }
517
518 /* Send the MAC cmd */
519 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
520 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
521
522 /* Workaround for hardware read-after-write restriction */
523 temp = smsc911x_reg_read(pdata, BYTE_TEST);
524
525 /* Wait for the read to complete */
526 if (likely(smsc911x_mac_complete(pdata) == 0))
527 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
528
529 SMSC_WARN(pdata, hw, "MAC busy after read");
530 return 0xFFFFFFFF;
531 }
532
533 /* Set a mac register, mac_lock must be acquired before calling */
534 static void smsc911x_mac_write(struct smsc911x_data *pdata,
535 unsigned int offset, u32 val)
536 {
537 unsigned int temp;
538
539 SMSC_ASSERT_MAC_LOCK(pdata);
540
541 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
542 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
543 SMSC_WARN(pdata, hw,
544 "smsc911x_mac_write failed, MAC busy at entry");
545 return;
546 }
547
548 /* Send data to write */
549 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
550
551 /* Write the actual data */
552 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
553 MAC_CSR_CMD_CSR_BUSY_));
554
555 /* Workaround for hardware read-after-write restriction */
556 temp = smsc911x_reg_read(pdata, BYTE_TEST);
557
558 /* Wait for the write to complete */
559 if (likely(smsc911x_mac_complete(pdata) == 0))
560 return;
561
562 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
563 }
564
565 /* Get a phy register */
566 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
567 {
568 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
569 unsigned long flags;
570 unsigned int addr;
571 int i, reg;
572
573 spin_lock_irqsave(&pdata->mac_lock, flags);
574
575 /* Confirm MII not busy */
576 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
577 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???");
578 reg = -EIO;
579 goto out;
580 }
581
582 /* Set the address, index & direction (read from PHY) */
583 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6);
584 smsc911x_mac_write(pdata, MII_ACC, addr);
585
586 /* Wait for read to complete w/ timeout */
587 for (i = 0; i < 100; i++)
588 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
589 reg = smsc911x_mac_read(pdata, MII_DATA);
590 goto out;
591 }
592
593 SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish");
594 reg = -EIO;
595
596 out:
597 spin_unlock_irqrestore(&pdata->mac_lock, flags);
598 return reg;
599 }
600
601 /* Set a phy register */
602 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
603 u16 val)
604 {
605 struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv;
606 unsigned long flags;
607 unsigned int addr;
608 int i, reg;
609
610 spin_lock_irqsave(&pdata->mac_lock, flags);
611
612 /* Confirm MII not busy */
613 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
614 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
615 reg = -EIO;
616 goto out;
617 }
618
619 /* Put the data to write in the MAC */
620 smsc911x_mac_write(pdata, MII_DATA, val);
621
622 /* Set the address, index & direction (write to PHY) */
623 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
624 MII_ACC_MII_WRITE_;
625 smsc911x_mac_write(pdata, MII_ACC, addr);
626
627 /* Wait for write to complete w/ timeout */
628 for (i = 0; i < 100; i++)
629 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
630 reg = 0;
631 goto out;
632 }
633
634 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
635 reg = -EIO;
636
637 out:
638 spin_unlock_irqrestore(&pdata->mac_lock, flags);
639 return reg;
640 }
641
642 /* Switch to external phy. Assumes tx and rx are stopped. */
643 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
644 {
645 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
646
647 /* Disable phy clocks to the MAC */
648 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
649 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
650 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
651 udelay(10); /* Enough time for clocks to stop */
652
653 /* Switch to external phy */
654 hwcfg |= HW_CFG_EXT_PHY_EN_;
655 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
656
657 /* Enable phy clocks to the MAC */
658 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
659 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
660 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
661 udelay(10); /* Enough time for clocks to restart */
662
663 hwcfg |= HW_CFG_SMI_SEL_;
664 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
665 }
666
667 /* Autodetects and enables external phy if present on supported chips.
668 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
669 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
670 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
671 {
672 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
673
674 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
675 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
676 pdata->using_extphy = 0;
677 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
678 SMSC_TRACE(pdata, hw, "Forcing external PHY");
679 smsc911x_phy_enable_external(pdata);
680 pdata->using_extphy = 1;
681 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
682 SMSC_TRACE(pdata, hw,
683 "HW_CFG EXT_PHY_DET set, using external PHY");
684 smsc911x_phy_enable_external(pdata);
685 pdata->using_extphy = 1;
686 } else {
687 SMSC_TRACE(pdata, hw,
688 "HW_CFG EXT_PHY_DET clear, using internal PHY");
689 pdata->using_extphy = 0;
690 }
691 }
692
693 /* Fetches a tx status out of the status fifo */
694 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
695 {
696 unsigned int result =
697 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
698
699 if (result != 0)
700 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
701
702 return result;
703 }
704
705 /* Fetches the next rx status */
706 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
707 {
708 unsigned int result =
709 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
710
711 if (result != 0)
712 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
713
714 return result;
715 }
716
717 #ifdef USE_PHY_WORK_AROUND
718 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
719 {
720 unsigned int tries;
721 u32 wrsz;
722 u32 rdsz;
723 ulong bufp;
724
725 for (tries = 0; tries < 10; tries++) {
726 unsigned int txcmd_a;
727 unsigned int txcmd_b;
728 unsigned int status;
729 unsigned int pktlength;
730 unsigned int i;
731
732 /* Zero-out rx packet memory */
733 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
734
735 /* Write tx packet to 118 */
736 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
737 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
738 txcmd_a |= MIN_PACKET_SIZE;
739
740 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
741
742 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
743 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
744
745 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
746 wrsz = MIN_PACKET_SIZE + 3;
747 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
748 wrsz >>= 2;
749
750 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
751
752 /* Wait till transmit is done */
753 i = 60;
754 do {
755 udelay(5);
756 status = smsc911x_tx_get_txstatus(pdata);
757 } while ((i--) && (!status));
758
759 if (!status) {
760 SMSC_WARN(pdata, hw,
761 "Failed to transmit during loopback test");
762 continue;
763 }
764 if (status & TX_STS_ES_) {
765 SMSC_WARN(pdata, hw,
766 "Transmit encountered errors during loopback test");
767 continue;
768 }
769
770 /* Wait till receive is done */
771 i = 60;
772 do {
773 udelay(5);
774 status = smsc911x_rx_get_rxstatus(pdata);
775 } while ((i--) && (!status));
776
777 if (!status) {
778 SMSC_WARN(pdata, hw,
779 "Failed to receive during loopback test");
780 continue;
781 }
782 if (status & RX_STS_ES_) {
783 SMSC_WARN(pdata, hw,
784 "Receive encountered errors during loopback test");
785 continue;
786 }
787
788 pktlength = ((status & 0x3FFF0000UL) >> 16);
789 bufp = (ulong)pdata->loopback_rx_pkt;
790 rdsz = pktlength + 3;
791 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
792 rdsz >>= 2;
793
794 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
795
796 if (pktlength != (MIN_PACKET_SIZE + 4)) {
797 SMSC_WARN(pdata, hw, "Unexpected packet size "
798 "during loop back test, size=%d, will retry",
799 pktlength);
800 } else {
801 unsigned int j;
802 int mismatch = 0;
803 for (j = 0; j < MIN_PACKET_SIZE; j++) {
804 if (pdata->loopback_tx_pkt[j]
805 != pdata->loopback_rx_pkt[j]) {
806 mismatch = 1;
807 break;
808 }
809 }
810 if (!mismatch) {
811 SMSC_TRACE(pdata, hw, "Successfully verified "
812 "loopback packet");
813 return 0;
814 } else {
815 SMSC_WARN(pdata, hw, "Data mismatch "
816 "during loop back test, will retry");
817 }
818 }
819 }
820
821 return -EIO;
822 }
823
824 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
825 {
826 unsigned int temp;
827 unsigned int i = 100000;
828
829 temp = smsc911x_reg_read(pdata, PMT_CTRL);
830 smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_);
831 do {
832 msleep(1);
833 temp = smsc911x_reg_read(pdata, PMT_CTRL);
834 } while ((i--) && (temp & PMT_CTRL_PHY_RST_));
835
836 if (unlikely(temp & PMT_CTRL_PHY_RST_)) {
837 SMSC_WARN(pdata, hw, "PHY reset failed to complete");
838 return -EIO;
839 }
840 /* Extra delay required because the phy may not be completed with
841 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
842 * enough delay but using 1ms here to be safe */
843 msleep(1);
844
845 return 0;
846 }
847
848 static int smsc911x_phy_loopbacktest(struct net_device *dev)
849 {
850 struct smsc911x_data *pdata = netdev_priv(dev);
851 struct phy_device *phy_dev = dev->phydev;
852 int result = -EIO;
853 unsigned int i, val;
854 unsigned long flags;
855
856 /* Initialise tx packet using broadcast destination address */
857 eth_broadcast_addr(pdata->loopback_tx_pkt);
858
859 /* Use incrementing source address */
860 for (i = 6; i < 12; i++)
861 pdata->loopback_tx_pkt[i] = (char)i;
862
863 /* Set length type field */
864 pdata->loopback_tx_pkt[12] = 0x00;
865 pdata->loopback_tx_pkt[13] = 0x00;
866
867 for (i = 14; i < MIN_PACKET_SIZE; i++)
868 pdata->loopback_tx_pkt[i] = (char)i;
869
870 val = smsc911x_reg_read(pdata, HW_CFG);
871 val &= HW_CFG_TX_FIF_SZ_;
872 val |= HW_CFG_SF_;
873 smsc911x_reg_write(pdata, HW_CFG, val);
874
875 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
876 smsc911x_reg_write(pdata, RX_CFG,
877 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
878
879 for (i = 0; i < 10; i++) {
880 /* Set PHY to 10/FD, no ANEG, and loopback mode */
881 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr,
882 MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX);
883
884 /* Enable MAC tx/rx, FD */
885 spin_lock_irqsave(&pdata->mac_lock, flags);
886 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
887 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
888 spin_unlock_irqrestore(&pdata->mac_lock, flags);
889
890 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
891 result = 0;
892 break;
893 }
894 pdata->resetcount++;
895
896 /* Disable MAC rx */
897 spin_lock_irqsave(&pdata->mac_lock, flags);
898 smsc911x_mac_write(pdata, MAC_CR, 0);
899 spin_unlock_irqrestore(&pdata->mac_lock, flags);
900
901 smsc911x_phy_reset(pdata);
902 }
903
904 /* Disable MAC */
905 spin_lock_irqsave(&pdata->mac_lock, flags);
906 smsc911x_mac_write(pdata, MAC_CR, 0);
907 spin_unlock_irqrestore(&pdata->mac_lock, flags);
908
909 /* Cancel PHY loopback mode */
910 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, MII_BMCR, 0);
911
912 smsc911x_reg_write(pdata, TX_CFG, 0);
913 smsc911x_reg_write(pdata, RX_CFG, 0);
914
915 return result;
916 }
917 #endif /* USE_PHY_WORK_AROUND */
918
919 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
920 {
921 struct net_device *ndev = pdata->dev;
922 struct phy_device *phy_dev = ndev->phydev;
923 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
924 u32 flow;
925 unsigned long flags;
926
927 if (phy_dev->duplex == DUPLEX_FULL) {
928 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
929 u16 rmtadv = phy_read(phy_dev, MII_LPA);
930 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
931
932 if (cap & FLOW_CTRL_RX)
933 flow = 0xFFFF0002;
934 else
935 flow = 0;
936
937 if (cap & FLOW_CTRL_TX)
938 afc |= 0xF;
939 else
940 afc &= ~0xF;
941
942 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
943 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
944 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
945 } else {
946 SMSC_TRACE(pdata, hw, "half duplex");
947 flow = 0;
948 afc |= 0xF;
949 }
950
951 spin_lock_irqsave(&pdata->mac_lock, flags);
952 smsc911x_mac_write(pdata, FLOW, flow);
953 spin_unlock_irqrestore(&pdata->mac_lock, flags);
954
955 smsc911x_reg_write(pdata, AFC_CFG, afc);
956 }
957
958 /* Update link mode if anything has changed. Called periodically when the
959 * PHY is in polling mode, even if nothing has changed. */
960 static void smsc911x_phy_adjust_link(struct net_device *dev)
961 {
962 struct smsc911x_data *pdata = netdev_priv(dev);
963 struct phy_device *phy_dev = dev->phydev;
964 unsigned long flags;
965 int carrier;
966
967 if (phy_dev->duplex != pdata->last_duplex) {
968 unsigned int mac_cr;
969 SMSC_TRACE(pdata, hw, "duplex state has changed");
970
971 spin_lock_irqsave(&pdata->mac_lock, flags);
972 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
973 if (phy_dev->duplex) {
974 SMSC_TRACE(pdata, hw,
975 "configuring for full duplex mode");
976 mac_cr |= MAC_CR_FDPX_;
977 } else {
978 SMSC_TRACE(pdata, hw,
979 "configuring for half duplex mode");
980 mac_cr &= ~MAC_CR_FDPX_;
981 }
982 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
983 spin_unlock_irqrestore(&pdata->mac_lock, flags);
984
985 smsc911x_phy_update_flowcontrol(pdata);
986 pdata->last_duplex = phy_dev->duplex;
987 }
988
989 carrier = netif_carrier_ok(dev);
990 if (carrier != pdata->last_carrier) {
991 SMSC_TRACE(pdata, hw, "carrier state has changed");
992 if (carrier) {
993 SMSC_TRACE(pdata, hw, "configuring for carrier OK");
994 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
995 (!pdata->using_extphy)) {
996 /* Restore original GPIO configuration */
997 pdata->gpio_setting = pdata->gpio_orig_setting;
998 smsc911x_reg_write(pdata, GPIO_CFG,
999 pdata->gpio_setting);
1000 }
1001 } else {
1002 SMSC_TRACE(pdata, hw, "configuring for no carrier");
1003 /* Check global setting that LED1
1004 * usage is 10/100 indicator */
1005 pdata->gpio_setting = smsc911x_reg_read(pdata,
1006 GPIO_CFG);
1007 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
1008 (!pdata->using_extphy)) {
1009 /* Force 10/100 LED off, after saving
1010 * original GPIO configuration */
1011 pdata->gpio_orig_setting = pdata->gpio_setting;
1012
1013 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
1014 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
1015 | GPIO_CFG_GPIODIR0_
1016 | GPIO_CFG_GPIOD0_);
1017 smsc911x_reg_write(pdata, GPIO_CFG,
1018 pdata->gpio_setting);
1019 }
1020 }
1021 pdata->last_carrier = carrier;
1022 }
1023 }
1024
1025 static int smsc911x_mii_probe(struct net_device *dev)
1026 {
1027 struct smsc911x_data *pdata = netdev_priv(dev);
1028 struct phy_device *phydev = NULL;
1029 int ret;
1030
1031 /* find the first phy */
1032 phydev = phy_find_first(pdata->mii_bus);
1033 if (!phydev) {
1034 netdev_err(dev, "no PHY found\n");
1035 return -ENODEV;
1036 }
1037
1038 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1039 phydev->mdio.addr, phydev->phy_id);
1040
1041 ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1042 pdata->config.phy_interface);
1043
1044 if (ret) {
1045 netdev_err(dev, "Could not attach to PHY\n");
1046 return ret;
1047 }
1048
1049 phy_attached_info(phydev);
1050
1051 /* mask with MAC supported features */
1052 phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause |
1053 SUPPORTED_Asym_Pause);
1054 phydev->advertising = phydev->supported;
1055
1056 pdata->last_duplex = -1;
1057 pdata->last_carrier = -1;
1058
1059 #ifdef USE_PHY_WORK_AROUND
1060 if (smsc911x_phy_loopbacktest(dev) < 0) {
1061 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1062 phy_disconnect(phydev);
1063 return -ENODEV;
1064 }
1065 SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1066 #endif /* USE_PHY_WORK_AROUND */
1067
1068 SMSC_TRACE(pdata, hw, "phy initialised successfully");
1069 return 0;
1070 }
1071
1072 static int smsc911x_mii_init(struct platform_device *pdev,
1073 struct net_device *dev)
1074 {
1075 struct smsc911x_data *pdata = netdev_priv(dev);
1076 int err = -ENXIO;
1077
1078 pdata->mii_bus = mdiobus_alloc();
1079 if (!pdata->mii_bus) {
1080 err = -ENOMEM;
1081 goto err_out_1;
1082 }
1083
1084 pdata->mii_bus->name = SMSC_MDIONAME;
1085 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1086 pdev->name, pdev->id);
1087 pdata->mii_bus->priv = pdata;
1088 pdata->mii_bus->read = smsc911x_mii_read;
1089 pdata->mii_bus->write = smsc911x_mii_write;
1090
1091 pdata->mii_bus->parent = &pdev->dev;
1092
1093 switch (pdata->idrev & 0xFFFF0000) {
1094 case 0x01170000:
1095 case 0x01150000:
1096 case 0x117A0000:
1097 case 0x115A0000:
1098 /* External PHY supported, try to autodetect */
1099 smsc911x_phy_initialise_external(pdata);
1100 break;
1101 default:
1102 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1103 "using internal PHY");
1104 pdata->using_extphy = 0;
1105 break;
1106 }
1107
1108 if (!pdata->using_extphy) {
1109 /* Mask all PHYs except ID 1 (internal) */
1110 pdata->mii_bus->phy_mask = ~(1 << 1);
1111 }
1112
1113 if (mdiobus_register(pdata->mii_bus)) {
1114 SMSC_WARN(pdata, probe, "Error registering mii bus");
1115 goto err_out_free_bus_2;
1116 }
1117
1118 return 0;
1119
1120 err_out_free_bus_2:
1121 mdiobus_free(pdata->mii_bus);
1122 err_out_1:
1123 return err;
1124 }
1125
1126 /* Gets the number of tx statuses in the fifo */
1127 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1128 {
1129 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1130 & TX_FIFO_INF_TSUSED_) >> 16;
1131 }
1132
1133 /* Reads tx statuses and increments counters where necessary */
1134 static void smsc911x_tx_update_txcounters(struct net_device *dev)
1135 {
1136 struct smsc911x_data *pdata = netdev_priv(dev);
1137 unsigned int tx_stat;
1138
1139 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1140 if (unlikely(tx_stat & 0x80000000)) {
1141 /* In this driver the packet tag is used as the packet
1142 * length. Since a packet length can never reach the
1143 * size of 0x8000, this bit is reserved. It is worth
1144 * noting that the "reserved bit" in the warning above
1145 * does not reference a hardware defined reserved bit
1146 * but rather a driver defined one.
1147 */
1148 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1149 } else {
1150 if (unlikely(tx_stat & TX_STS_ES_)) {
1151 dev->stats.tx_errors++;
1152 } else {
1153 dev->stats.tx_packets++;
1154 dev->stats.tx_bytes += (tx_stat >> 16);
1155 }
1156 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1157 dev->stats.collisions += 16;
1158 dev->stats.tx_aborted_errors += 1;
1159 } else {
1160 dev->stats.collisions +=
1161 ((tx_stat >> 3) & 0xF);
1162 }
1163 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1164 dev->stats.tx_carrier_errors += 1;
1165 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1166 dev->stats.collisions++;
1167 dev->stats.tx_aborted_errors++;
1168 }
1169 }
1170 }
1171 }
1172
1173 /* Increments the Rx error counters */
1174 static void
1175 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1176 {
1177 int crc_err = 0;
1178
1179 if (unlikely(rxstat & RX_STS_ES_)) {
1180 dev->stats.rx_errors++;
1181 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1182 dev->stats.rx_crc_errors++;
1183 crc_err = 1;
1184 }
1185 }
1186 if (likely(!crc_err)) {
1187 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1188 (rxstat & RX_STS_LENGTH_ERR_)))
1189 dev->stats.rx_length_errors++;
1190 if (rxstat & RX_STS_MCAST_)
1191 dev->stats.multicast++;
1192 }
1193 }
1194
1195 /* Quickly dumps bad packets */
1196 static void
1197 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1198 {
1199 if (likely(pktwords >= 4)) {
1200 unsigned int timeout = 500;
1201 unsigned int val;
1202 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1203 do {
1204 udelay(1);
1205 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1206 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1207
1208 if (unlikely(timeout == 0))
1209 SMSC_WARN(pdata, hw, "Timed out waiting for "
1210 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1211 } else {
1212 unsigned int temp;
1213 while (pktwords--)
1214 temp = smsc911x_reg_read(pdata, RX_DATA_FIFO);
1215 }
1216 }
1217
1218 /* NAPI poll function */
1219 static int smsc911x_poll(struct napi_struct *napi, int budget)
1220 {
1221 struct smsc911x_data *pdata =
1222 container_of(napi, struct smsc911x_data, napi);
1223 struct net_device *dev = pdata->dev;
1224 int npackets = 0;
1225
1226 while (npackets < budget) {
1227 unsigned int pktlength;
1228 unsigned int pktwords;
1229 struct sk_buff *skb;
1230 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1231
1232 if (!rxstat) {
1233 unsigned int temp;
1234 /* We processed all packets available. Tell NAPI it can
1235 * stop polling then re-enable rx interrupts */
1236 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1237 napi_complete(napi);
1238 temp = smsc911x_reg_read(pdata, INT_EN);
1239 temp |= INT_EN_RSFL_EN_;
1240 smsc911x_reg_write(pdata, INT_EN, temp);
1241 break;
1242 }
1243
1244 /* Count packet for NAPI scheduling, even if it has an error.
1245 * Error packets still require cycles to discard */
1246 npackets++;
1247
1248 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1249 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1250 smsc911x_rx_counterrors(dev, rxstat);
1251
1252 if (unlikely(rxstat & RX_STS_ES_)) {
1253 SMSC_WARN(pdata, rx_err,
1254 "Discarding packet with error bit set");
1255 /* Packet has an error, discard it and continue with
1256 * the next */
1257 smsc911x_rx_fastforward(pdata, pktwords);
1258 dev->stats.rx_dropped++;
1259 continue;
1260 }
1261
1262 skb = netdev_alloc_skb(dev, pktwords << 2);
1263 if (unlikely(!skb)) {
1264 SMSC_WARN(pdata, rx_err,
1265 "Unable to allocate skb for rx packet");
1266 /* Drop the packet and stop this polling iteration */
1267 smsc911x_rx_fastforward(pdata, pktwords);
1268 dev->stats.rx_dropped++;
1269 break;
1270 }
1271
1272 pdata->ops->rx_readfifo(pdata,
1273 (unsigned int *)skb->data, pktwords);
1274
1275 /* Align IP on 16B boundary */
1276 skb_reserve(skb, NET_IP_ALIGN);
1277 skb_put(skb, pktlength - 4);
1278 skb->protocol = eth_type_trans(skb, dev);
1279 skb_checksum_none_assert(skb);
1280 netif_receive_skb(skb);
1281
1282 /* Update counters */
1283 dev->stats.rx_packets++;
1284 dev->stats.rx_bytes += (pktlength - 4);
1285 }
1286
1287 /* Return total received packets */
1288 return npackets;
1289 }
1290
1291 /* Returns hash bit number for given MAC address
1292 * Example:
1293 * 01 00 5E 00 00 01 -> returns bit number 31 */
1294 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1295 {
1296 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1297 }
1298
1299 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1300 {
1301 /* Performs the multicast & mac_cr update. This is called when
1302 * safe on the current hardware, and with the mac_lock held */
1303 unsigned int mac_cr;
1304
1305 SMSC_ASSERT_MAC_LOCK(pdata);
1306
1307 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1308 mac_cr |= pdata->set_bits_mask;
1309 mac_cr &= ~(pdata->clear_bits_mask);
1310 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1311 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1312 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1313 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1314 mac_cr, pdata->hashhi, pdata->hashlo);
1315 }
1316
1317 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1318 {
1319 unsigned int mac_cr;
1320
1321 /* This function is only called for older LAN911x devices
1322 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1323 * be modified during Rx - newer devices immediately update the
1324 * registers.
1325 *
1326 * This is called from interrupt context */
1327
1328 spin_lock(&pdata->mac_lock);
1329
1330 /* Check Rx has stopped */
1331 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1332 SMSC_WARN(pdata, drv, "Rx not stopped");
1333
1334 /* Perform the update - safe to do now Rx has stopped */
1335 smsc911x_rx_multicast_update(pdata);
1336
1337 /* Re-enable Rx */
1338 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1339 mac_cr |= MAC_CR_RXEN_;
1340 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1341
1342 pdata->multicast_update_pending = 0;
1343
1344 spin_unlock(&pdata->mac_lock);
1345 }
1346
1347 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1348 {
1349 struct net_device *ndev = pdata->dev;
1350 struct phy_device *phy_dev = ndev->phydev;
1351 int rc = 0;
1352
1353 if (!phy_dev)
1354 return rc;
1355
1356 /* If the internal PHY is in General Power-Down mode, all, except the
1357 * management interface, is powered-down and stays in that condition as
1358 * long as Phy register bit 0.11 is HIGH.
1359 *
1360 * In that case, clear the bit 0.11, so the PHY powers up and we can
1361 * access to the phy registers.
1362 */
1363 rc = phy_read(phy_dev, MII_BMCR);
1364 if (rc < 0) {
1365 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1366 return rc;
1367 }
1368
1369 /* If the PHY general power-down bit is not set is not necessary to
1370 * disable the general power down-mode.
1371 */
1372 if (rc & BMCR_PDOWN) {
1373 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1374 if (rc < 0) {
1375 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1376 return rc;
1377 }
1378
1379 usleep_range(1000, 1500);
1380 }
1381
1382 return 0;
1383 }
1384
1385 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1386 {
1387 struct net_device *ndev = pdata->dev;
1388 struct phy_device *phy_dev = ndev->phydev;
1389 int rc = 0;
1390
1391 if (!phy_dev)
1392 return rc;
1393
1394 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1395
1396 if (rc < 0) {
1397 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1398 return rc;
1399 }
1400
1401 /* Only disable if energy detect mode is already enabled */
1402 if (rc & MII_LAN83C185_EDPWRDOWN) {
1403 /* Disable energy detect mode for this SMSC Transceivers */
1404 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1405 rc & (~MII_LAN83C185_EDPWRDOWN));
1406
1407 if (rc < 0) {
1408 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1409 return rc;
1410 }
1411 /* Allow PHY to wakeup */
1412 mdelay(2);
1413 }
1414
1415 return 0;
1416 }
1417
1418 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1419 {
1420 struct net_device *ndev = pdata->dev;
1421 struct phy_device *phy_dev = ndev->phydev;
1422 int rc = 0;
1423
1424 if (!phy_dev)
1425 return rc;
1426
1427 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1428
1429 if (rc < 0) {
1430 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1431 return rc;
1432 }
1433
1434 /* Only enable if energy detect mode is already disabled */
1435 if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1436 /* Enable energy detect mode for this SMSC Transceivers */
1437 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1438 rc | MII_LAN83C185_EDPWRDOWN);
1439
1440 if (rc < 0) {
1441 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1442 return rc;
1443 }
1444 }
1445 return 0;
1446 }
1447
1448 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1449 {
1450 unsigned int timeout;
1451 unsigned int temp;
1452 int ret;
1453 unsigned int reset_offset = HW_CFG;
1454 unsigned int reset_mask = HW_CFG_SRST_;
1455
1456 /*
1457 * Make sure to power-up the PHY chip before doing a reset, otherwise
1458 * the reset fails.
1459 */
1460 ret = smsc911x_phy_general_power_up(pdata);
1461 if (ret) {
1462 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1463 return ret;
1464 }
1465
1466 /*
1467 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1468 * are initialized in a Energy Detect Power-Down mode that prevents
1469 * the MAC chip to be software reseted. So we have to wakeup the PHY
1470 * before.
1471 */
1472 if (pdata->generation == 4) {
1473 ret = smsc911x_phy_disable_energy_detect(pdata);
1474
1475 if (ret) {
1476 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1477 return ret;
1478 }
1479 }
1480
1481 if ((pdata->idrev & 0xFFFF0000) == LAN9250) {
1482 /* special reset for LAN9250 */
1483 reset_offset = RESET_CTL;
1484 reset_mask = RESET_CTL_DIGITAL_RST_;
1485 }
1486
1487 /* Reset the LAN911x */
1488 smsc911x_reg_write(pdata, reset_offset, reset_mask);
1489
1490 /* verify reset bit is cleared */
1491 timeout = 10;
1492 do {
1493 udelay(10);
1494 temp = smsc911x_reg_read(pdata, reset_offset);
1495 } while ((--timeout) && (temp & reset_mask));
1496
1497 if (unlikely(temp & reset_mask)) {
1498 SMSC_WARN(pdata, drv, "Failed to complete reset");
1499 return -EIO;
1500 }
1501
1502 if (pdata->generation == 4) {
1503 ret = smsc911x_phy_enable_energy_detect(pdata);
1504
1505 if (ret) {
1506 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1507 return ret;
1508 }
1509 }
1510
1511 return 0;
1512 }
1513
1514 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1515 static void
1516 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6])
1517 {
1518 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1519 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1520 (dev_addr[1] << 8) | dev_addr[0];
1521
1522 SMSC_ASSERT_MAC_LOCK(pdata);
1523
1524 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1525 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1526 }
1527
1528 static void smsc911x_disable_irq_chip(struct net_device *dev)
1529 {
1530 struct smsc911x_data *pdata = netdev_priv(dev);
1531
1532 smsc911x_reg_write(pdata, INT_EN, 0);
1533 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1534 }
1535
1536 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1537 {
1538 struct net_device *dev = dev_id;
1539 struct smsc911x_data *pdata = netdev_priv(dev);
1540 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1541 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1542 int serviced = IRQ_NONE;
1543 u32 temp;
1544
1545 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1546 temp = smsc911x_reg_read(pdata, INT_EN);
1547 temp &= (~INT_EN_SW_INT_EN_);
1548 smsc911x_reg_write(pdata, INT_EN, temp);
1549 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1550 pdata->software_irq_signal = 1;
1551 smp_wmb();
1552 serviced = IRQ_HANDLED;
1553 }
1554
1555 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1556 /* Called when there is a multicast update scheduled and
1557 * it is now safe to complete the update */
1558 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1559 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1560 if (pdata->multicast_update_pending)
1561 smsc911x_rx_multicast_update_workaround(pdata);
1562 serviced = IRQ_HANDLED;
1563 }
1564
1565 if (intsts & inten & INT_STS_TDFA_) {
1566 temp = smsc911x_reg_read(pdata, FIFO_INT);
1567 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1568 smsc911x_reg_write(pdata, FIFO_INT, temp);
1569 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1570 netif_wake_queue(dev);
1571 serviced = IRQ_HANDLED;
1572 }
1573
1574 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1575 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1576 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1577 serviced = IRQ_HANDLED;
1578 }
1579
1580 if (likely(intsts & inten & INT_STS_RSFL_)) {
1581 if (likely(napi_schedule_prep(&pdata->napi))) {
1582 /* Disable Rx interrupts */
1583 temp = smsc911x_reg_read(pdata, INT_EN);
1584 temp &= (~INT_EN_RSFL_EN_);
1585 smsc911x_reg_write(pdata, INT_EN, temp);
1586 /* Schedule a NAPI poll */
1587 __napi_schedule(&pdata->napi);
1588 } else {
1589 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1590 }
1591 serviced = IRQ_HANDLED;
1592 }
1593
1594 return serviced;
1595 }
1596
1597 static int smsc911x_open(struct net_device *dev)
1598 {
1599 struct smsc911x_data *pdata = netdev_priv(dev);
1600 unsigned int timeout;
1601 unsigned int temp;
1602 unsigned int intcfg;
1603 int retval;
1604 int irq_flags;
1605
1606 /* find and start the given phy */
1607 if (!dev->phydev) {
1608 retval = smsc911x_mii_probe(dev);
1609 if (retval < 0) {
1610 SMSC_WARN(pdata, probe, "Error starting phy");
1611 goto out;
1612 }
1613 }
1614
1615 /* Reset the LAN911x */
1616 retval = smsc911x_soft_reset(pdata);
1617 if (retval) {
1618 SMSC_WARN(pdata, hw, "soft reset failed");
1619 goto mii_free_out;
1620 }
1621
1622 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1623 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1624
1625 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1626 spin_lock_irq(&pdata->mac_lock);
1627 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1628 spin_unlock_irq(&pdata->mac_lock);
1629
1630 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1631 timeout = 50;
1632 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1633 --timeout) {
1634 udelay(10);
1635 }
1636
1637 if (unlikely(timeout == 0))
1638 SMSC_WARN(pdata, ifup,
1639 "Timed out waiting for EEPROM busy bit to clear");
1640
1641 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1642
1643 /* The soft reset above cleared the device's MAC address,
1644 * restore it from local copy (set in probe) */
1645 spin_lock_irq(&pdata->mac_lock);
1646 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1647 spin_unlock_irq(&pdata->mac_lock);
1648
1649 /* Initialise irqs, but leave all sources disabled */
1650 smsc911x_disable_irq_chip(dev);
1651
1652 /* Set interrupt deassertion to 100uS */
1653 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1654
1655 if (pdata->config.irq_polarity) {
1656 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1657 intcfg |= INT_CFG_IRQ_POL_;
1658 } else {
1659 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1660 }
1661
1662 if (pdata->config.irq_type) {
1663 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1664 intcfg |= INT_CFG_IRQ_TYPE_;
1665 } else {
1666 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1667 }
1668
1669 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1670
1671 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1672 pdata->software_irq_signal = 0;
1673 smp_wmb();
1674
1675 irq_flags = irq_get_trigger_type(dev->irq);
1676 retval = request_irq(dev->irq, smsc911x_irqhandler,
1677 irq_flags | IRQF_SHARED, dev->name, dev);
1678 if (retval) {
1679 SMSC_WARN(pdata, probe,
1680 "Unable to claim requested irq: %d", dev->irq);
1681 goto mii_free_out;
1682 }
1683
1684 temp = smsc911x_reg_read(pdata, INT_EN);
1685 temp |= INT_EN_SW_INT_EN_;
1686 smsc911x_reg_write(pdata, INT_EN, temp);
1687
1688 timeout = 1000;
1689 while (timeout--) {
1690 if (pdata->software_irq_signal)
1691 break;
1692 msleep(1);
1693 }
1694
1695 if (!pdata->software_irq_signal) {
1696 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1697 dev->irq);
1698 retval = -ENODEV;
1699 goto irq_stop_out;
1700 }
1701 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1702 dev->irq);
1703
1704 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1705 (unsigned long)pdata->ioaddr, dev->irq);
1706
1707 /* Reset the last known duplex and carrier */
1708 pdata->last_duplex = -1;
1709 pdata->last_carrier = -1;
1710
1711 /* Bring the PHY up */
1712 phy_start(dev->phydev);
1713
1714 temp = smsc911x_reg_read(pdata, HW_CFG);
1715 /* Preserve TX FIFO size and external PHY configuration */
1716 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1717 temp |= HW_CFG_SF_;
1718 smsc911x_reg_write(pdata, HW_CFG, temp);
1719
1720 temp = smsc911x_reg_read(pdata, FIFO_INT);
1721 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1722 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1723 smsc911x_reg_write(pdata, FIFO_INT, temp);
1724
1725 /* set RX Data offset to 2 bytes for alignment */
1726 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1727
1728 /* enable NAPI polling before enabling RX interrupts */
1729 napi_enable(&pdata->napi);
1730
1731 temp = smsc911x_reg_read(pdata, INT_EN);
1732 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1733 smsc911x_reg_write(pdata, INT_EN, temp);
1734
1735 spin_lock_irq(&pdata->mac_lock);
1736 temp = smsc911x_mac_read(pdata, MAC_CR);
1737 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1738 smsc911x_mac_write(pdata, MAC_CR, temp);
1739 spin_unlock_irq(&pdata->mac_lock);
1740
1741 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1742
1743 netif_start_queue(dev);
1744 return 0;
1745
1746 irq_stop_out:
1747 free_irq(dev->irq, dev);
1748 mii_free_out:
1749 phy_disconnect(dev->phydev);
1750 dev->phydev = NULL;
1751 out:
1752 return retval;
1753 }
1754
1755 /* Entry point for stopping the interface */
1756 static int smsc911x_stop(struct net_device *dev)
1757 {
1758 struct smsc911x_data *pdata = netdev_priv(dev);
1759 unsigned int temp;
1760
1761 /* Disable all device interrupts */
1762 temp = smsc911x_reg_read(pdata, INT_CFG);
1763 temp &= ~INT_CFG_IRQ_EN_;
1764 smsc911x_reg_write(pdata, INT_CFG, temp);
1765
1766 /* Stop Tx and Rx polling */
1767 netif_stop_queue(dev);
1768 napi_disable(&pdata->napi);
1769
1770 /* At this point all Rx and Tx activity is stopped */
1771 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1772 smsc911x_tx_update_txcounters(dev);
1773
1774 free_irq(dev->irq, dev);
1775
1776 /* Bring the PHY down */
1777 if (dev->phydev) {
1778 phy_stop(dev->phydev);
1779 phy_disconnect(dev->phydev);
1780 dev->phydev = NULL;
1781 }
1782 netif_carrier_off(dev);
1783
1784 SMSC_TRACE(pdata, ifdown, "Interface stopped");
1785 return 0;
1786 }
1787
1788 /* Entry point for transmitting a packet */
1789 static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1790 {
1791 struct smsc911x_data *pdata = netdev_priv(dev);
1792 unsigned int freespace;
1793 unsigned int tx_cmd_a;
1794 unsigned int tx_cmd_b;
1795 unsigned int temp;
1796 u32 wrsz;
1797 ulong bufp;
1798
1799 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1800
1801 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1802 SMSC_WARN(pdata, tx_err,
1803 "Tx data fifo low, space available: %d", freespace);
1804
1805 /* Word alignment adjustment */
1806 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1807 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1808 tx_cmd_a |= (unsigned int)skb->len;
1809
1810 tx_cmd_b = ((unsigned int)skb->len) << 16;
1811 tx_cmd_b |= (unsigned int)skb->len;
1812
1813 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1814 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1815
1816 bufp = (ulong)skb->data & (~0x3);
1817 wrsz = (u32)skb->len + 3;
1818 wrsz += (u32)((ulong)skb->data & 0x3);
1819 wrsz >>= 2;
1820
1821 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1822 freespace -= (skb->len + 32);
1823 skb_tx_timestamp(skb);
1824 dev_consume_skb_any(skb);
1825
1826 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1827 smsc911x_tx_update_txcounters(dev);
1828
1829 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1830 netif_stop_queue(dev);
1831 temp = smsc911x_reg_read(pdata, FIFO_INT);
1832 temp &= 0x00FFFFFF;
1833 temp |= 0x32000000;
1834 smsc911x_reg_write(pdata, FIFO_INT, temp);
1835 }
1836
1837 return NETDEV_TX_OK;
1838 }
1839
1840 /* Entry point for getting status counters */
1841 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1842 {
1843 struct smsc911x_data *pdata = netdev_priv(dev);
1844 smsc911x_tx_update_txcounters(dev);
1845 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1846 return &dev->stats;
1847 }
1848
1849 /* Entry point for setting addressing modes */
1850 static void smsc911x_set_multicast_list(struct net_device *dev)
1851 {
1852 struct smsc911x_data *pdata = netdev_priv(dev);
1853 unsigned long flags;
1854
1855 if (dev->flags & IFF_PROMISC) {
1856 /* Enabling promiscuous mode */
1857 pdata->set_bits_mask = MAC_CR_PRMS_;
1858 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1859 pdata->hashhi = 0;
1860 pdata->hashlo = 0;
1861 } else if (dev->flags & IFF_ALLMULTI) {
1862 /* Enabling all multicast mode */
1863 pdata->set_bits_mask = MAC_CR_MCPAS_;
1864 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1865 pdata->hashhi = 0;
1866 pdata->hashlo = 0;
1867 } else if (!netdev_mc_empty(dev)) {
1868 /* Enabling specific multicast addresses */
1869 unsigned int hash_high = 0;
1870 unsigned int hash_low = 0;
1871 struct netdev_hw_addr *ha;
1872
1873 pdata->set_bits_mask = MAC_CR_HPFILT_;
1874 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1875
1876 netdev_for_each_mc_addr(ha, dev) {
1877 unsigned int bitnum = smsc911x_hash(ha->addr);
1878 unsigned int mask = 0x01 << (bitnum & 0x1F);
1879
1880 if (bitnum & 0x20)
1881 hash_high |= mask;
1882 else
1883 hash_low |= mask;
1884 }
1885
1886 pdata->hashhi = hash_high;
1887 pdata->hashlo = hash_low;
1888 } else {
1889 /* Enabling local MAC address only */
1890 pdata->set_bits_mask = 0;
1891 pdata->clear_bits_mask =
1892 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1893 pdata->hashhi = 0;
1894 pdata->hashlo = 0;
1895 }
1896
1897 spin_lock_irqsave(&pdata->mac_lock, flags);
1898
1899 if (pdata->generation <= 1) {
1900 /* Older hardware revision - cannot change these flags while
1901 * receiving data */
1902 if (!pdata->multicast_update_pending) {
1903 unsigned int temp;
1904 SMSC_TRACE(pdata, hw, "scheduling mcast update");
1905 pdata->multicast_update_pending = 1;
1906
1907 /* Request the hardware to stop, then perform the
1908 * update when we get an RX_STOP interrupt */
1909 temp = smsc911x_mac_read(pdata, MAC_CR);
1910 temp &= ~(MAC_CR_RXEN_);
1911 smsc911x_mac_write(pdata, MAC_CR, temp);
1912 } else {
1913 /* There is another update pending, this should now
1914 * use the newer values */
1915 }
1916 } else {
1917 /* Newer hardware revision - can write immediately */
1918 smsc911x_rx_multicast_update(pdata);
1919 }
1920
1921 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1922 }
1923
1924 #ifdef CONFIG_NET_POLL_CONTROLLER
1925 static void smsc911x_poll_controller(struct net_device *dev)
1926 {
1927 disable_irq(dev->irq);
1928 smsc911x_irqhandler(0, dev);
1929 enable_irq(dev->irq);
1930 }
1931 #endif /* CONFIG_NET_POLL_CONTROLLER */
1932
1933 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1934 {
1935 struct smsc911x_data *pdata = netdev_priv(dev);
1936 struct sockaddr *addr = p;
1937
1938 /* On older hardware revisions we cannot change the mac address
1939 * registers while receiving data. Newer devices can safely change
1940 * this at any time. */
1941 if (pdata->generation <= 1 && netif_running(dev))
1942 return -EBUSY;
1943
1944 if (!is_valid_ether_addr(addr->sa_data))
1945 return -EADDRNOTAVAIL;
1946
1947 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
1948
1949 spin_lock_irq(&pdata->mac_lock);
1950 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1951 spin_unlock_irq(&pdata->mac_lock);
1952
1953 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1954
1955 return 0;
1956 }
1957
1958 /* Standard ioctls for mii-tool */
1959 static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1960 {
1961 if (!netif_running(dev) || !dev->phydev)
1962 return -EINVAL;
1963
1964 return phy_mii_ioctl(dev->phydev, ifr, cmd);
1965 }
1966
1967 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1968 struct ethtool_drvinfo *info)
1969 {
1970 strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1971 strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1972 strlcpy(info->bus_info, dev_name(dev->dev.parent),
1973 sizeof(info->bus_info));
1974 }
1975
1976 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1977 {
1978 struct smsc911x_data *pdata = netdev_priv(dev);
1979 return pdata->msg_enable;
1980 }
1981
1982 static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level)
1983 {
1984 struct smsc911x_data *pdata = netdev_priv(dev);
1985 pdata->msg_enable = level;
1986 }
1987
1988 static int smsc911x_ethtool_getregslen(struct net_device *dev)
1989 {
1990 return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) *
1991 sizeof(u32);
1992 }
1993
1994 static void
1995 smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs,
1996 void *buf)
1997 {
1998 struct smsc911x_data *pdata = netdev_priv(dev);
1999 struct phy_device *phy_dev = dev->phydev;
2000 unsigned long flags;
2001 unsigned int i;
2002 unsigned int j = 0;
2003 u32 *data = buf;
2004
2005 regs->version = pdata->idrev;
2006 for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32)))
2007 data[j++] = smsc911x_reg_read(pdata, i);
2008
2009 for (i = MAC_CR; i <= WUCSR; i++) {
2010 spin_lock_irqsave(&pdata->mac_lock, flags);
2011 data[j++] = smsc911x_mac_read(pdata, i);
2012 spin_unlock_irqrestore(&pdata->mac_lock, flags);
2013 }
2014
2015 for (i = 0; i <= 31; i++)
2016 data[j++] = smsc911x_mii_read(phy_dev->mdio.bus,
2017 phy_dev->mdio.addr, i);
2018 }
2019
2020 static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata)
2021 {
2022 unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG);
2023 temp &= ~GPIO_CFG_EEPR_EN_;
2024 smsc911x_reg_write(pdata, GPIO_CFG, temp);
2025 msleep(1);
2026 }
2027
2028 static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op)
2029 {
2030 int timeout = 100;
2031 u32 e2cmd;
2032
2033 SMSC_TRACE(pdata, drv, "op 0x%08x", op);
2034 if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) {
2035 SMSC_WARN(pdata, drv, "Busy at start");
2036 return -EBUSY;
2037 }
2038
2039 e2cmd = op | E2P_CMD_EPC_BUSY_;
2040 smsc911x_reg_write(pdata, E2P_CMD, e2cmd);
2041
2042 do {
2043 msleep(1);
2044 e2cmd = smsc911x_reg_read(pdata, E2P_CMD);
2045 } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout));
2046
2047 if (!timeout) {
2048 SMSC_TRACE(pdata, drv, "TIMED OUT");
2049 return -EAGAIN;
2050 }
2051
2052 if (e2cmd & E2P_CMD_EPC_TIMEOUT_) {
2053 SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation");
2054 return -EINVAL;
2055 }
2056
2057 return 0;
2058 }
2059
2060 static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata,
2061 u8 address, u8 *data)
2062 {
2063 u32 op = E2P_CMD_EPC_CMD_READ_ | address;
2064 int ret;
2065
2066 SMSC_TRACE(pdata, drv, "address 0x%x", address);
2067 ret = smsc911x_eeprom_send_cmd(pdata, op);
2068
2069 if (!ret)
2070 data[address] = smsc911x_reg_read(pdata, E2P_DATA);
2071
2072 return ret;
2073 }
2074
2075 static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata,
2076 u8 address, u8 data)
2077 {
2078 u32 op = E2P_CMD_EPC_CMD_ERASE_ | address;
2079 u32 temp;
2080 int ret;
2081
2082 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2083 ret = smsc911x_eeprom_send_cmd(pdata, op);
2084
2085 if (!ret) {
2086 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2087 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2088
2089 /* Workaround for hardware read-after-write restriction */
2090 temp = smsc911x_reg_read(pdata, BYTE_TEST);
2091
2092 ret = smsc911x_eeprom_send_cmd(pdata, op);
2093 }
2094
2095 return ret;
2096 }
2097
2098 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2099 {
2100 return SMSC911X_EEPROM_SIZE;
2101 }
2102
2103 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2104 struct ethtool_eeprom *eeprom, u8 *data)
2105 {
2106 struct smsc911x_data *pdata = netdev_priv(dev);
2107 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2108 int len;
2109 int i;
2110
2111 smsc911x_eeprom_enable_access(pdata);
2112
2113 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2114 for (i = 0; i < len; i++) {
2115 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2116 if (ret < 0) {
2117 eeprom->len = 0;
2118 return ret;
2119 }
2120 }
2121
2122 memcpy(data, &eeprom_data[eeprom->offset], len);
2123 eeprom->len = len;
2124 return 0;
2125 }
2126
2127 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2128 struct ethtool_eeprom *eeprom, u8 *data)
2129 {
2130 int ret;
2131 struct smsc911x_data *pdata = netdev_priv(dev);
2132
2133 smsc911x_eeprom_enable_access(pdata);
2134 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2135 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2136 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2137
2138 /* Single byte write, according to man page */
2139 eeprom->len = 1;
2140
2141 return ret;
2142 }
2143
2144 static const struct ethtool_ops smsc911x_ethtool_ops = {
2145 .get_link = ethtool_op_get_link,
2146 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2147 .nway_reset = phy_ethtool_nway_reset,
2148 .get_msglevel = smsc911x_ethtool_getmsglevel,
2149 .set_msglevel = smsc911x_ethtool_setmsglevel,
2150 .get_regs_len = smsc911x_ethtool_getregslen,
2151 .get_regs = smsc911x_ethtool_getregs,
2152 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2153 .get_eeprom = smsc911x_ethtool_get_eeprom,
2154 .set_eeprom = smsc911x_ethtool_set_eeprom,
2155 .get_ts_info = ethtool_op_get_ts_info,
2156 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2157 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2158 };
2159
2160 static const struct net_device_ops smsc911x_netdev_ops = {
2161 .ndo_open = smsc911x_open,
2162 .ndo_stop = smsc911x_stop,
2163 .ndo_start_xmit = smsc911x_hard_start_xmit,
2164 .ndo_get_stats = smsc911x_get_stats,
2165 .ndo_set_rx_mode = smsc911x_set_multicast_list,
2166 .ndo_do_ioctl = smsc911x_do_ioctl,
2167 .ndo_validate_addr = eth_validate_addr,
2168 .ndo_set_mac_address = smsc911x_set_mac_address,
2169 #ifdef CONFIG_NET_POLL_CONTROLLER
2170 .ndo_poll_controller = smsc911x_poll_controller,
2171 #endif
2172 };
2173
2174 /* copies the current mac address from hardware to dev->dev_addr */
2175 static void smsc911x_read_mac_address(struct net_device *dev)
2176 {
2177 struct smsc911x_data *pdata = netdev_priv(dev);
2178 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2179 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2180
2181 dev->dev_addr[0] = (u8)(mac_low32);
2182 dev->dev_addr[1] = (u8)(mac_low32 >> 8);
2183 dev->dev_addr[2] = (u8)(mac_low32 >> 16);
2184 dev->dev_addr[3] = (u8)(mac_low32 >> 24);
2185 dev->dev_addr[4] = (u8)(mac_high16);
2186 dev->dev_addr[5] = (u8)(mac_high16 >> 8);
2187 }
2188
2189 /* Initializing private device structures, only called from probe */
2190 static int smsc911x_init(struct net_device *dev)
2191 {
2192 struct smsc911x_data *pdata = netdev_priv(dev);
2193 unsigned int byte_test, mask;
2194 unsigned int to = 100;
2195
2196 SMSC_TRACE(pdata, probe, "Driver Parameters:");
2197 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2198 (unsigned long)pdata->ioaddr);
2199 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2200 SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2201
2202 spin_lock_init(&pdata->dev_lock);
2203 spin_lock_init(&pdata->mac_lock);
2204
2205 if (pdata->ioaddr == NULL) {
2206 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2207 return -ENODEV;
2208 }
2209
2210 /*
2211 * poll the READY bit in PMT_CTRL. Any other access to the device is
2212 * forbidden while this bit isn't set. Try for 100ms
2213 *
2214 * Note that this test is done before the WORD_SWAP register is
2215 * programmed. So in some configurations the READY bit is at 16 before
2216 * WORD_SWAP is written to. This issue is worked around by waiting
2217 * until either bit 0 or bit 16 gets set in PMT_CTRL.
2218 *
2219 * SMSC has confirmed that checking bit 16 (marked as reserved in
2220 * the datasheet) is fine since these bits "will either never be set
2221 * or can only go high after READY does (so also indicate the device
2222 * is ready)".
2223 */
2224
2225 mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2226 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2227 udelay(1000);
2228
2229 if (to == 0) {
2230 netdev_err(dev, "Device not READY in 100ms aborting\n");
2231 return -ENODEV;
2232 }
2233
2234 /* Check byte ordering */
2235 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2236 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2237 if (byte_test == 0x43218765) {
2238 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2239 "applying WORD_SWAP");
2240 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2241
2242 /* 1 dummy read of BYTE_TEST is needed after a write to
2243 * WORD_SWAP before its contents are valid */
2244 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2245
2246 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2247 }
2248
2249 if (byte_test != 0x87654321) {
2250 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2251 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2252 SMSC_WARN(pdata, probe,
2253 "top 16 bits equal to bottom 16 bits");
2254 SMSC_TRACE(pdata, probe,
2255 "This may mean the chip is set "
2256 "for 32 bit while the bus is reading 16 bit");
2257 }
2258 return -ENODEV;
2259 }
2260
2261 /* Default generation to zero (all workarounds apply) */
2262 pdata->generation = 0;
2263
2264 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2265 switch (pdata->idrev & 0xFFFF0000) {
2266 case LAN9118:
2267 case LAN9117:
2268 case LAN9116:
2269 case LAN9115:
2270 case LAN89218:
2271 /* LAN911[5678] family */
2272 pdata->generation = pdata->idrev & 0x0000FFFF;
2273 break;
2274
2275 case LAN9218:
2276 case LAN9217:
2277 case LAN9216:
2278 case LAN9215:
2279 /* LAN921[5678] family */
2280 pdata->generation = 3;
2281 break;
2282
2283 case LAN9210:
2284 case LAN9211:
2285 case LAN9220:
2286 case LAN9221:
2287 case LAN9250:
2288 /* LAN9210/LAN9211/LAN9220/LAN9221/LAN9250 */
2289 pdata->generation = 4;
2290 break;
2291
2292 default:
2293 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2294 pdata->idrev);
2295 return -ENODEV;
2296 }
2297
2298 SMSC_TRACE(pdata, probe,
2299 "LAN911x identified, idrev: 0x%08X, generation: %d",
2300 pdata->idrev, pdata->generation);
2301
2302 if (pdata->generation == 0)
2303 SMSC_WARN(pdata, probe,
2304 "This driver is not intended for this chip revision");
2305
2306 /* workaround for platforms without an eeprom, where the mac address
2307 * is stored elsewhere and set by the bootloader. This saves the
2308 * mac address before resetting the device */
2309 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2310 spin_lock_irq(&pdata->mac_lock);
2311 smsc911x_read_mac_address(dev);
2312 spin_unlock_irq(&pdata->mac_lock);
2313 }
2314
2315 /* Reset the LAN911x */
2316 if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
2317 return -ENODEV;
2318
2319 dev->flags |= IFF_MULTICAST;
2320 netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT);
2321 dev->netdev_ops = &smsc911x_netdev_ops;
2322 dev->ethtool_ops = &smsc911x_ethtool_ops;
2323
2324 return 0;
2325 }
2326
2327 static int smsc911x_drv_remove(struct platform_device *pdev)
2328 {
2329 struct net_device *dev;
2330 struct smsc911x_data *pdata;
2331 struct resource *res;
2332
2333 dev = platform_get_drvdata(pdev);
2334 BUG_ON(!dev);
2335 pdata = netdev_priv(dev);
2336 BUG_ON(!pdata);
2337 BUG_ON(!pdata->ioaddr);
2338 WARN_ON(dev->phydev);
2339
2340 SMSC_TRACE(pdata, ifdown, "Stopping driver");
2341
2342 mdiobus_unregister(pdata->mii_bus);
2343 mdiobus_free(pdata->mii_bus);
2344
2345 unregister_netdev(dev);
2346 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2347 "smsc911x-memory");
2348 if (!res)
2349 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2350
2351 release_mem_region(res->start, resource_size(res));
2352
2353 iounmap(pdata->ioaddr);
2354
2355 (void)smsc911x_disable_resources(pdev);
2356 smsc911x_free_resources(pdev);
2357
2358 free_netdev(dev);
2359
2360 pm_runtime_put(&pdev->dev);
2361 pm_runtime_disable(&pdev->dev);
2362
2363 return 0;
2364 }
2365
2366 /* standard register acces */
2367 static const struct smsc911x_ops standard_smsc911x_ops = {
2368 .reg_read = __smsc911x_reg_read,
2369 .reg_write = __smsc911x_reg_write,
2370 .rx_readfifo = smsc911x_rx_readfifo,
2371 .tx_writefifo = smsc911x_tx_writefifo,
2372 };
2373
2374 /* shifted register access */
2375 static const struct smsc911x_ops shifted_smsc911x_ops = {
2376 .reg_read = __smsc911x_reg_read_shift,
2377 .reg_write = __smsc911x_reg_write_shift,
2378 .rx_readfifo = smsc911x_rx_readfifo_shift,
2379 .tx_writefifo = smsc911x_tx_writefifo_shift,
2380 };
2381
2382 static int smsc911x_probe_config(struct smsc911x_platform_config *config,
2383 struct device *dev)
2384 {
2385 int phy_interface;
2386 u32 width = 0;
2387 int err;
2388
2389 phy_interface = device_get_phy_mode(dev);
2390 if (phy_interface < 0)
2391 phy_interface = PHY_INTERFACE_MODE_NA;
2392 config->phy_interface = phy_interface;
2393
2394 device_get_mac_address(dev, config->mac, ETH_ALEN);
2395
2396 err = device_property_read_u32(dev, "reg-io-width", &width);
2397 if (err == -ENXIO)
2398 return err;
2399 if (!err && width == 4)
2400 config->flags |= SMSC911X_USE_32BIT;
2401 else
2402 config->flags |= SMSC911X_USE_16BIT;
2403
2404 device_property_read_u32(dev, "reg-shift", &config->shift);
2405
2406 if (device_property_present(dev, "smsc,irq-active-high"))
2407 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2408
2409 if (device_property_present(dev, "smsc,irq-push-pull"))
2410 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2411
2412 if (device_property_present(dev, "smsc,force-internal-phy"))
2413 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2414
2415 if (device_property_present(dev, "smsc,force-external-phy"))
2416 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2417
2418 if (device_property_present(dev, "smsc,save-mac-address"))
2419 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2420
2421 return 0;
2422 }
2423
2424 static int smsc911x_drv_probe(struct platform_device *pdev)
2425 {
2426 struct net_device *dev;
2427 struct smsc911x_data *pdata;
2428 struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2429 struct resource *res;
2430 int res_size, irq;
2431 int retval;
2432
2433 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2434 "smsc911x-memory");
2435 if (!res)
2436 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2437 if (!res) {
2438 pr_warn("Could not allocate resource\n");
2439 retval = -ENODEV;
2440 goto out_0;
2441 }
2442 res_size = resource_size(res);
2443
2444 irq = platform_get_irq(pdev, 0);
2445 if (irq == -EPROBE_DEFER) {
2446 retval = -EPROBE_DEFER;
2447 goto out_0;
2448 } else if (irq <= 0) {
2449 pr_warn("Could not allocate irq resource\n");
2450 retval = -ENODEV;
2451 goto out_0;
2452 }
2453
2454 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2455 retval = -EBUSY;
2456 goto out_0;
2457 }
2458
2459 dev = alloc_etherdev(sizeof(struct smsc911x_data));
2460 if (!dev) {
2461 retval = -ENOMEM;
2462 goto out_release_io_1;
2463 }
2464
2465 SET_NETDEV_DEV(dev, &pdev->dev);
2466
2467 pdata = netdev_priv(dev);
2468 dev->irq = irq;
2469 pdata->ioaddr = ioremap_nocache(res->start, res_size);
2470
2471 pdata->dev = dev;
2472 pdata->msg_enable = ((1 << debug) - 1);
2473
2474 platform_set_drvdata(pdev, dev);
2475
2476 retval = smsc911x_request_resources(pdev);
2477 if (retval)
2478 goto out_request_resources_fail;
2479
2480 retval = smsc911x_enable_resources(pdev);
2481 if (retval)
2482 goto out_enable_resources_fail;
2483
2484 if (pdata->ioaddr == NULL) {
2485 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2486 retval = -ENOMEM;
2487 goto out_disable_resources;
2488 }
2489
2490 retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
2491 if (retval && config) {
2492 /* copy config parameters across to pdata */
2493 memcpy(&pdata->config, config, sizeof(pdata->config));
2494 retval = 0;
2495 }
2496
2497 if (retval) {
2498 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2499 goto out_disable_resources;
2500 }
2501
2502 /* assume standard, non-shifted, access to HW registers */
2503 pdata->ops = &standard_smsc911x_ops;
2504 /* apply the right access if shifting is needed */
2505 if (pdata->config.shift)
2506 pdata->ops = &shifted_smsc911x_ops;
2507
2508 pm_runtime_enable(&pdev->dev);
2509 pm_runtime_get_sync(&pdev->dev);
2510
2511 retval = smsc911x_init(dev);
2512 if (retval < 0)
2513 goto out_disable_resources;
2514
2515 netif_carrier_off(dev);
2516
2517 retval = smsc911x_mii_init(pdev, dev);
2518 if (retval) {
2519 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2520 goto out_disable_resources;
2521 }
2522
2523 retval = register_netdev(dev);
2524 if (retval) {
2525 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2526 goto out_disable_resources;
2527 } else {
2528 SMSC_TRACE(pdata, probe,
2529 "Network interface: \"%s\"", dev->name);
2530 }
2531
2532 spin_lock_irq(&pdata->mac_lock);
2533
2534 /* Check if mac address has been specified when bringing interface up */
2535 if (is_valid_ether_addr(dev->dev_addr)) {
2536 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2537 SMSC_TRACE(pdata, probe,
2538 "MAC Address is specified by configuration");
2539 } else if (is_valid_ether_addr(pdata->config.mac)) {
2540 memcpy(dev->dev_addr, pdata->config.mac, ETH_ALEN);
2541 SMSC_TRACE(pdata, probe,
2542 "MAC Address specified by platform data");
2543 } else {
2544 /* Try reading mac address from device. if EEPROM is present
2545 * it will already have been set */
2546 smsc_get_mac(dev);
2547
2548 if (is_valid_ether_addr(dev->dev_addr)) {
2549 /* eeprom values are valid so use them */
2550 SMSC_TRACE(pdata, probe,
2551 "Mac Address is read from LAN911x EEPROM");
2552 } else {
2553 /* eeprom values are invalid, generate random MAC */
2554 eth_hw_addr_random(dev);
2555 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2556 SMSC_TRACE(pdata, probe,
2557 "MAC Address is set to eth_random_addr");
2558 }
2559 }
2560
2561 spin_unlock_irq(&pdata->mac_lock);
2562
2563 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2564
2565 return 0;
2566
2567 out_disable_resources:
2568 pm_runtime_put(&pdev->dev);
2569 pm_runtime_disable(&pdev->dev);
2570 (void)smsc911x_disable_resources(pdev);
2571 out_enable_resources_fail:
2572 smsc911x_free_resources(pdev);
2573 out_request_resources_fail:
2574 iounmap(pdata->ioaddr);
2575 free_netdev(dev);
2576 out_release_io_1:
2577 release_mem_region(res->start, resource_size(res));
2578 out_0:
2579 return retval;
2580 }
2581
2582 #ifdef CONFIG_PM
2583 /* This implementation assumes the devices remains powered on its VDDVARIO
2584 * pins during suspend. */
2585
2586 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2587
2588 static int smsc911x_suspend(struct device *dev)
2589 {
2590 struct net_device *ndev = dev_get_drvdata(dev);
2591 struct smsc911x_data *pdata = netdev_priv(ndev);
2592
2593 /* enable wake on LAN, energy detection and the external PME
2594 * signal. */
2595 smsc911x_reg_write(pdata, PMT_CTRL,
2596 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2597 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2598
2599 pm_runtime_disable(dev);
2600 pm_runtime_set_suspended(dev);
2601
2602 return 0;
2603 }
2604
2605 static int smsc911x_resume(struct device *dev)
2606 {
2607 struct net_device *ndev = dev_get_drvdata(dev);
2608 struct smsc911x_data *pdata = netdev_priv(ndev);
2609 unsigned int to = 100;
2610
2611 pm_runtime_enable(dev);
2612 pm_runtime_resume(dev);
2613
2614 /* Note 3.11 from the datasheet:
2615 * "When the LAN9220 is in a power saving state, a write of any
2616 * data to the BYTE_TEST register will wake-up the device."
2617 */
2618 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2619
2620 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2621 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2622 * if it failed. */
2623 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2624 udelay(1000);
2625
2626 return (to == 0) ? -EIO : 0;
2627 }
2628
2629 static const struct dev_pm_ops smsc911x_pm_ops = {
2630 .suspend = smsc911x_suspend,
2631 .resume = smsc911x_resume,
2632 };
2633
2634 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2635
2636 #else
2637 #define SMSC911X_PM_OPS NULL
2638 #endif
2639
2640 #ifdef CONFIG_OF
2641 static const struct of_device_id smsc911x_dt_ids[] = {
2642 { .compatible = "smsc,lan9115", },
2643 { /* sentinel */ }
2644 };
2645 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2646 #endif
2647
2648 static const struct acpi_device_id smsc911x_acpi_match[] = {
2649 { "ARMH9118", 0 },
2650 { }
2651 };
2652 MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
2653
2654 static struct platform_driver smsc911x_driver = {
2655 .probe = smsc911x_drv_probe,
2656 .remove = smsc911x_drv_remove,
2657 .driver = {
2658 .name = SMSC_CHIPNAME,
2659 .pm = SMSC911X_PM_OPS,
2660 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2661 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
2662 },
2663 };
2664
2665 /* Entry point for loading the module */
2666 static int __init smsc911x_init_module(void)
2667 {
2668 SMSC_INITIALIZE();
2669 return platform_driver_register(&smsc911x_driver);
2670 }
2671
2672 /* entry point for unloading the module */
2673 static void __exit smsc911x_cleanup_module(void)
2674 {
2675 platform_driver_unregister(&smsc911x_driver);
2676 }
2677
2678 module_init(smsc911x_init_module);
2679 module_exit(smsc911x_cleanup_module);
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