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_gpio.h>
47 #include <linux/of_net.h>
48 #include <linux/acpi.h>
49 #include <linux/pm_runtime.h>
50 #include <linux/property.h>
51 #include <linux/gpio/consumer.h>
52
53 #include "smsc911x.h"
54
55 #define SMSC_CHIPNAME "smsc911x"
56 #define SMSC_MDIONAME "smsc911x-mdio"
57 #define SMSC_DRV_VERSION "2008-10-21"
58
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(SMSC_DRV_VERSION);
61 MODULE_ALIAS("platform:smsc911x");
62
63 #if USE_DEBUG > 0
64 static int debug = 16;
65 #else
66 static int debug = 3;
67 #endif
68
69 module_param(debug, int, 0);
70 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
71
72 struct smsc911x_data;
73
74 struct smsc911x_ops {
75 u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg);
76 void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val);
77 void (*rx_readfifo)(struct smsc911x_data *pdata,
78 unsigned int *buf, unsigned int wordcount);
79 void (*tx_writefifo)(struct smsc911x_data *pdata,
80 unsigned int *buf, unsigned int wordcount);
81 };
82
83 #define SMSC911X_NUM_SUPPLIES 2
84
85 struct smsc911x_data {
86 void __iomem *ioaddr;
87
88 unsigned int idrev;
89
90 /* used to decide which workarounds apply */
91 unsigned int generation;
92
93 /* device configuration (copied from platform_data during probe) */
94 struct smsc911x_platform_config config;
95
96 /* This needs to be acquired before calling any of below:
97 * smsc911x_mac_read(), smsc911x_mac_write()
98 */
99 spinlock_t mac_lock;
100
101 /* spinlock to ensure register accesses are serialised */
102 spinlock_t dev_lock;
103
104 struct mii_bus *mii_bus;
105 unsigned int using_extphy;
106 int last_duplex;
107 int last_carrier;
108
109 u32 msg_enable;
110 unsigned int gpio_setting;
111 unsigned int gpio_orig_setting;
112 struct net_device *dev;
113 struct napi_struct napi;
114
115 unsigned int software_irq_signal;
116
117 #ifdef USE_PHY_WORK_AROUND
118 #define MIN_PACKET_SIZE (64)
119 char loopback_tx_pkt[MIN_PACKET_SIZE];
120 char loopback_rx_pkt[MIN_PACKET_SIZE];
121 unsigned int resetcount;
122 #endif
123
124 /* Members for Multicast filter workaround */
125 unsigned int multicast_update_pending;
126 unsigned int set_bits_mask;
127 unsigned int clear_bits_mask;
128 unsigned int hashhi;
129 unsigned int hashlo;
130
131 /* register access functions */
132 const struct smsc911x_ops *ops;
133
134 /* regulators */
135 struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
136
137 /* Reset GPIO */
138 struct gpio_desc *reset_gpiod;
139
140 /* clock */
141 struct clk *clk;
142 };
143
144 /* Easy access to information */
145 #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift))
146
__smsc911x_reg_read(struct smsc911x_data * pdata,u32 reg)147 static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
148 {
149 if (pdata->config.flags & SMSC911X_USE_32BIT)
150 return readl(pdata->ioaddr + reg);
151
152 if (pdata->config.flags & SMSC911X_USE_16BIT)
153 return ((readw(pdata->ioaddr + reg) & 0xFFFF) |
154 ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16));
155
156 BUG();
157 return 0;
158 }
159
160 static inline u32
__smsc911x_reg_read_shift(struct smsc911x_data * pdata,u32 reg)161 __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg)
162 {
163 if (pdata->config.flags & SMSC911X_USE_32BIT)
164 return readl(pdata->ioaddr + __smsc_shift(pdata, reg));
165
166 if (pdata->config.flags & SMSC911X_USE_16BIT)
167 return (readw(pdata->ioaddr +
168 __smsc_shift(pdata, reg)) & 0xFFFF) |
169 ((readw(pdata->ioaddr +
170 __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16);
171
172 BUG();
173 return 0;
174 }
175
smsc911x_reg_read(struct smsc911x_data * pdata,u32 reg)176 static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg)
177 {
178 u32 data;
179 unsigned long flags;
180
181 spin_lock_irqsave(&pdata->dev_lock, flags);
182 data = pdata->ops->reg_read(pdata, reg);
183 spin_unlock_irqrestore(&pdata->dev_lock, flags);
184
185 return data;
186 }
187
__smsc911x_reg_write(struct smsc911x_data * pdata,u32 reg,u32 val)188 static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
189 u32 val)
190 {
191 if (pdata->config.flags & SMSC911X_USE_32BIT) {
192 writel(val, pdata->ioaddr + reg);
193 return;
194 }
195
196 if (pdata->config.flags & SMSC911X_USE_16BIT) {
197 writew(val & 0xFFFF, pdata->ioaddr + reg);
198 writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2);
199 return;
200 }
201
202 BUG();
203 }
204
205 static inline void
__smsc911x_reg_write_shift(struct smsc911x_data * pdata,u32 reg,u32 val)206 __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val)
207 {
208 if (pdata->config.flags & SMSC911X_USE_32BIT) {
209 writel(val, pdata->ioaddr + __smsc_shift(pdata, reg));
210 return;
211 }
212
213 if (pdata->config.flags & SMSC911X_USE_16BIT) {
214 writew(val & 0xFFFF,
215 pdata->ioaddr + __smsc_shift(pdata, reg));
216 writew((val >> 16) & 0xFFFF,
217 pdata->ioaddr + __smsc_shift(pdata, reg + 2));
218 return;
219 }
220
221 BUG();
222 }
223
smsc911x_reg_write(struct smsc911x_data * pdata,u32 reg,u32 val)224 static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg,
225 u32 val)
226 {
227 unsigned long flags;
228
229 spin_lock_irqsave(&pdata->dev_lock, flags);
230 pdata->ops->reg_write(pdata, reg, val);
231 spin_unlock_irqrestore(&pdata->dev_lock, flags);
232 }
233
234 /* Writes a packet to the TX_DATA_FIFO */
235 static inline void
smsc911x_tx_writefifo(struct smsc911x_data * pdata,unsigned int * buf,unsigned int wordcount)236 smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf,
237 unsigned int wordcount)
238 {
239 unsigned long flags;
240
241 spin_lock_irqsave(&pdata->dev_lock, flags);
242
243 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
244 while (wordcount--)
245 __smsc911x_reg_write(pdata, TX_DATA_FIFO,
246 swab32(*buf++));
247 goto out;
248 }
249
250 if (pdata->config.flags & SMSC911X_USE_32BIT) {
251 iowrite32_rep(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount);
252 goto out;
253 }
254
255 if (pdata->config.flags & SMSC911X_USE_16BIT) {
256 while (wordcount--)
257 __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++);
258 goto out;
259 }
260
261 BUG();
262 out:
263 spin_unlock_irqrestore(&pdata->dev_lock, flags);
264 }
265
266 /* Writes a packet to the TX_DATA_FIFO - shifted version */
267 static inline void
smsc911x_tx_writefifo_shift(struct smsc911x_data * pdata,unsigned int * buf,unsigned int wordcount)268 smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
269 unsigned int wordcount)
270 {
271 unsigned long flags;
272
273 spin_lock_irqsave(&pdata->dev_lock, flags);
274
275 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
276 while (wordcount--)
277 __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO,
278 swab32(*buf++));
279 goto out;
280 }
281
282 if (pdata->config.flags & SMSC911X_USE_32BIT) {
283 iowrite32_rep(pdata->ioaddr + __smsc_shift(pdata,
284 TX_DATA_FIFO), buf, wordcount);
285 goto out;
286 }
287
288 if (pdata->config.flags & SMSC911X_USE_16BIT) {
289 while (wordcount--)
290 __smsc911x_reg_write_shift(pdata,
291 TX_DATA_FIFO, *buf++);
292 goto out;
293 }
294
295 BUG();
296 out:
297 spin_unlock_irqrestore(&pdata->dev_lock, flags);
298 }
299
300 /* Reads a packet out of the RX_DATA_FIFO */
301 static inline void
smsc911x_rx_readfifo(struct smsc911x_data * pdata,unsigned int * buf,unsigned int wordcount)302 smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf,
303 unsigned int wordcount)
304 {
305 unsigned long flags;
306
307 spin_lock_irqsave(&pdata->dev_lock, flags);
308
309 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
310 while (wordcount--)
311 *buf++ = swab32(__smsc911x_reg_read(pdata,
312 RX_DATA_FIFO));
313 goto out;
314 }
315
316 if (pdata->config.flags & SMSC911X_USE_32BIT) {
317 ioread32_rep(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount);
318 goto out;
319 }
320
321 if (pdata->config.flags & SMSC911X_USE_16BIT) {
322 while (wordcount--)
323 *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO);
324 goto out;
325 }
326
327 BUG();
328 out:
329 spin_unlock_irqrestore(&pdata->dev_lock, flags);
330 }
331
332 /* Reads a packet out of the RX_DATA_FIFO - shifted version */
333 static inline void
smsc911x_rx_readfifo_shift(struct smsc911x_data * pdata,unsigned int * buf,unsigned int wordcount)334 smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf,
335 unsigned int wordcount)
336 {
337 unsigned long flags;
338
339 spin_lock_irqsave(&pdata->dev_lock, flags);
340
341 if (pdata->config.flags & SMSC911X_SWAP_FIFO) {
342 while (wordcount--)
343 *buf++ = swab32(__smsc911x_reg_read_shift(pdata,
344 RX_DATA_FIFO));
345 goto out;
346 }
347
348 if (pdata->config.flags & SMSC911X_USE_32BIT) {
349 ioread32_rep(pdata->ioaddr + __smsc_shift(pdata,
350 RX_DATA_FIFO), buf, wordcount);
351 goto out;
352 }
353
354 if (pdata->config.flags & SMSC911X_USE_16BIT) {
355 while (wordcount--)
356 *buf++ = __smsc911x_reg_read_shift(pdata,
357 RX_DATA_FIFO);
358 goto out;
359 }
360
361 BUG();
362 out:
363 spin_unlock_irqrestore(&pdata->dev_lock, flags);
364 }
365
366 /*
367 * enable regulator and clock resources.
368 */
smsc911x_enable_resources(struct platform_device * pdev)369 static int smsc911x_enable_resources(struct platform_device *pdev)
370 {
371 struct net_device *ndev = platform_get_drvdata(pdev);
372 struct smsc911x_data *pdata = netdev_priv(ndev);
373 int ret = 0;
374
375 ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
376 pdata->supplies);
377 if (ret)
378 netdev_err(ndev, "failed to enable regulators %d\n",
379 ret);
380
381 if (!IS_ERR(pdata->clk)) {
382 ret = clk_prepare_enable(pdata->clk);
383 if (ret < 0)
384 netdev_err(ndev, "failed to enable clock %d\n", ret);
385 }
386
387 return ret;
388 }
389
390 /*
391 * disable resources, currently just regulators.
392 */
smsc911x_disable_resources(struct platform_device * pdev)393 static int smsc911x_disable_resources(struct platform_device *pdev)
394 {
395 struct net_device *ndev = platform_get_drvdata(pdev);
396 struct smsc911x_data *pdata = netdev_priv(ndev);
397 int ret = 0;
398
399 ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
400 pdata->supplies);
401
402 if (!IS_ERR(pdata->clk))
403 clk_disable_unprepare(pdata->clk);
404
405 return ret;
406 }
407
408 /*
409 * Request resources, currently just regulators.
410 *
411 * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
412 * these are not always-on we need to request regulators to be turned on
413 * before we can try to access the device registers.
414 */
smsc911x_request_resources(struct platform_device * pdev)415 static int smsc911x_request_resources(struct platform_device *pdev)
416 {
417 struct net_device *ndev = platform_get_drvdata(pdev);
418 struct smsc911x_data *pdata = netdev_priv(ndev);
419 int ret = 0;
420
421 /* Request regulators */
422 pdata->supplies[0].supply = "vdd33a";
423 pdata->supplies[1].supply = "vddvario";
424 ret = regulator_bulk_get(&pdev->dev,
425 ARRAY_SIZE(pdata->supplies),
426 pdata->supplies);
427 if (ret) {
428 /*
429 * Retry on deferrals, else just report the error
430 * and try to continue.
431 */
432 if (ret == -EPROBE_DEFER)
433 return ret;
434 netdev_err(ndev, "couldn't get regulators %d\n",
435 ret);
436 }
437
438 /* Request optional RESET GPIO */
439 pdata->reset_gpiod = devm_gpiod_get_optional(&pdev->dev,
440 "reset",
441 GPIOD_OUT_LOW);
442
443 /* Request clock */
444 pdata->clk = clk_get(&pdev->dev, NULL);
445 if (IS_ERR(pdata->clk))
446 dev_dbg(&pdev->dev, "couldn't get clock %li\n",
447 PTR_ERR(pdata->clk));
448
449 return ret;
450 }
451
452 /*
453 * Free resources, currently just regulators.
454 *
455 */
smsc911x_free_resources(struct platform_device * pdev)456 static void smsc911x_free_resources(struct platform_device *pdev)
457 {
458 struct net_device *ndev = platform_get_drvdata(pdev);
459 struct smsc911x_data *pdata = netdev_priv(ndev);
460
461 /* Free regulators */
462 regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
463 pdata->supplies);
464
465 /* Free clock */
466 if (!IS_ERR(pdata->clk)) {
467 clk_put(pdata->clk);
468 pdata->clk = NULL;
469 }
470 }
471
472 /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
473 * and smsc911x_mac_write, so assumes mac_lock is held */
smsc911x_mac_complete(struct smsc911x_data * pdata)474 static int smsc911x_mac_complete(struct smsc911x_data *pdata)
475 {
476 int i;
477 u32 val;
478
479 SMSC_ASSERT_MAC_LOCK(pdata);
480
481 for (i = 0; i < 40; i++) {
482 val = smsc911x_reg_read(pdata, MAC_CSR_CMD);
483 if (!(val & MAC_CSR_CMD_CSR_BUSY_))
484 return 0;
485 }
486 SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. "
487 "MAC_CSR_CMD: 0x%08X", val);
488 return -EIO;
489 }
490
491 /* Fetches a MAC register value. Assumes mac_lock is acquired */
smsc911x_mac_read(struct smsc911x_data * pdata,unsigned int offset)492 static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset)
493 {
494 unsigned int temp;
495
496 SMSC_ASSERT_MAC_LOCK(pdata);
497
498 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
499 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
500 SMSC_WARN(pdata, hw, "MAC busy at entry");
501 return 0xFFFFFFFF;
502 }
503
504 /* Send the MAC cmd */
505 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
506 MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_));
507
508 /* Workaround for hardware read-after-write restriction */
509 temp = smsc911x_reg_read(pdata, BYTE_TEST);
510
511 /* Wait for the read to complete */
512 if (likely(smsc911x_mac_complete(pdata) == 0))
513 return smsc911x_reg_read(pdata, MAC_CSR_DATA);
514
515 SMSC_WARN(pdata, hw, "MAC busy after read");
516 return 0xFFFFFFFF;
517 }
518
519 /* Set a mac register, mac_lock must be acquired before calling */
smsc911x_mac_write(struct smsc911x_data * pdata,unsigned int offset,u32 val)520 static void smsc911x_mac_write(struct smsc911x_data *pdata,
521 unsigned int offset, u32 val)
522 {
523 unsigned int temp;
524
525 SMSC_ASSERT_MAC_LOCK(pdata);
526
527 temp = smsc911x_reg_read(pdata, MAC_CSR_CMD);
528 if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) {
529 SMSC_WARN(pdata, hw,
530 "smsc911x_mac_write failed, MAC busy at entry");
531 return;
532 }
533
534 /* Send data to write */
535 smsc911x_reg_write(pdata, MAC_CSR_DATA, val);
536
537 /* Write the actual data */
538 smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) |
539 MAC_CSR_CMD_CSR_BUSY_));
540
541 /* Workaround for hardware read-after-write restriction */
542 temp = smsc911x_reg_read(pdata, BYTE_TEST);
543
544 /* Wait for the write to complete */
545 if (likely(smsc911x_mac_complete(pdata) == 0))
546 return;
547
548 SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write");
549 }
550
551 /* Get a phy register */
smsc911x_mii_read(struct mii_bus * bus,int phyaddr,int regidx)552 static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
553 {
554 struct smsc911x_data *pdata = bus->priv;
555 unsigned long flags;
556 unsigned int addr;
557 int i, reg;
558
559 pm_runtime_get_sync(bus->parent);
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
583 out:
584 spin_unlock_irqrestore(&pdata->mac_lock, flags);
585 pm_runtime_put(bus->parent);
586 return reg;
587 }
588
589 /* Set a phy register */
smsc911x_mii_write(struct mii_bus * bus,int phyaddr,int regidx,u16 val)590 static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
591 u16 val)
592 {
593 struct smsc911x_data *pdata = bus->priv;
594 unsigned long flags;
595 unsigned int addr;
596 int i, reg;
597
598 pm_runtime_get_sync(bus->parent);
599 spin_lock_irqsave(&pdata->mac_lock, flags);
600
601 /* Confirm MII not busy */
602 if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
603 SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???");
604 reg = -EIO;
605 goto out;
606 }
607
608 /* Put the data to write in the MAC */
609 smsc911x_mac_write(pdata, MII_DATA, val);
610
611 /* Set the address, index & direction (write to PHY) */
612 addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) |
613 MII_ACC_MII_WRITE_;
614 smsc911x_mac_write(pdata, MII_ACC, addr);
615
616 /* Wait for write to complete w/ timeout */
617 for (i = 0; i < 100; i++)
618 if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) {
619 reg = 0;
620 goto out;
621 }
622
623 SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish");
624 reg = -EIO;
625
626 out:
627 spin_unlock_irqrestore(&pdata->mac_lock, flags);
628 pm_runtime_put(bus->parent);
629 return reg;
630 }
631
632 /* Switch to external phy. Assumes tx and rx are stopped. */
smsc911x_phy_enable_external(struct smsc911x_data * pdata)633 static void smsc911x_phy_enable_external(struct smsc911x_data *pdata)
634 {
635 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
636
637 /* Disable phy clocks to the MAC */
638 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
639 hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_;
640 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
641 udelay(10); /* Enough time for clocks to stop */
642
643 /* Switch to external phy */
644 hwcfg |= HW_CFG_EXT_PHY_EN_;
645 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
646
647 /* Enable phy clocks to the MAC */
648 hwcfg &= (~HW_CFG_PHY_CLK_SEL_);
649 hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_;
650 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
651 udelay(10); /* Enough time for clocks to restart */
652
653 hwcfg |= HW_CFG_SMI_SEL_;
654 smsc911x_reg_write(pdata, HW_CFG, hwcfg);
655 }
656
657 /* Autodetects and enables external phy if present on supported chips.
658 * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY
659 * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */
smsc911x_phy_initialise_external(struct smsc911x_data * pdata)660 static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata)
661 {
662 unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG);
663
664 if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) {
665 SMSC_TRACE(pdata, hw, "Forcing internal PHY");
666 pdata->using_extphy = 0;
667 } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) {
668 SMSC_TRACE(pdata, hw, "Forcing external PHY");
669 smsc911x_phy_enable_external(pdata);
670 pdata->using_extphy = 1;
671 } else if (hwcfg & HW_CFG_EXT_PHY_DET_) {
672 SMSC_TRACE(pdata, hw,
673 "HW_CFG EXT_PHY_DET set, using external PHY");
674 smsc911x_phy_enable_external(pdata);
675 pdata->using_extphy = 1;
676 } else {
677 SMSC_TRACE(pdata, hw,
678 "HW_CFG EXT_PHY_DET clear, using internal PHY");
679 pdata->using_extphy = 0;
680 }
681 }
682
683 /* Fetches a tx status out of the status fifo */
smsc911x_tx_get_txstatus(struct smsc911x_data * pdata)684 static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata)
685 {
686 unsigned int result =
687 smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_;
688
689 if (result != 0)
690 result = smsc911x_reg_read(pdata, TX_STATUS_FIFO);
691
692 return result;
693 }
694
695 /* Fetches the next rx status */
smsc911x_rx_get_rxstatus(struct smsc911x_data * pdata)696 static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata)
697 {
698 unsigned int result =
699 smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_;
700
701 if (result != 0)
702 result = smsc911x_reg_read(pdata, RX_STATUS_FIFO);
703
704 return result;
705 }
706
707 #ifdef USE_PHY_WORK_AROUND
smsc911x_phy_check_loopbackpkt(struct smsc911x_data * pdata)708 static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata)
709 {
710 unsigned int tries;
711 u32 wrsz;
712 u32 rdsz;
713 ulong bufp;
714
715 for (tries = 0; tries < 10; tries++) {
716 unsigned int txcmd_a;
717 unsigned int txcmd_b;
718 unsigned int status;
719 unsigned int pktlength;
720 unsigned int i;
721
722 /* Zero-out rx packet memory */
723 memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE);
724
725 /* Write tx packet to 118 */
726 txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16;
727 txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
728 txcmd_a |= MIN_PACKET_SIZE;
729
730 txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE;
731
732 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a);
733 smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b);
734
735 bufp = (ulong)pdata->loopback_tx_pkt & (~0x3);
736 wrsz = MIN_PACKET_SIZE + 3;
737 wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3);
738 wrsz >>= 2;
739
740 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
741
742 /* Wait till transmit is done */
743 i = 60;
744 do {
745 udelay(5);
746 status = smsc911x_tx_get_txstatus(pdata);
747 } while ((i--) && (!status));
748
749 if (!status) {
750 SMSC_WARN(pdata, hw,
751 "Failed to transmit during loopback test");
752 continue;
753 }
754 if (status & TX_STS_ES_) {
755 SMSC_WARN(pdata, hw,
756 "Transmit encountered errors during loopback test");
757 continue;
758 }
759
760 /* Wait till receive is done */
761 i = 60;
762 do {
763 udelay(5);
764 status = smsc911x_rx_get_rxstatus(pdata);
765 } while ((i--) && (!status));
766
767 if (!status) {
768 SMSC_WARN(pdata, hw,
769 "Failed to receive during loopback test");
770 continue;
771 }
772 if (status & RX_STS_ES_) {
773 SMSC_WARN(pdata, hw,
774 "Receive encountered errors during loopback test");
775 continue;
776 }
777
778 pktlength = ((status & 0x3FFF0000UL) >> 16);
779 bufp = (ulong)pdata->loopback_rx_pkt;
780 rdsz = pktlength + 3;
781 rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3);
782 rdsz >>= 2;
783
784 pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz);
785
786 if (pktlength != (MIN_PACKET_SIZE + 4)) {
787 SMSC_WARN(pdata, hw, "Unexpected packet size "
788 "during loop back test, size=%d, will retry",
789 pktlength);
790 } else {
791 unsigned int j;
792 int mismatch = 0;
793 for (j = 0; j < MIN_PACKET_SIZE; j++) {
794 if (pdata->loopback_tx_pkt[j]
795 != pdata->loopback_rx_pkt[j]) {
796 mismatch = 1;
797 break;
798 }
799 }
800 if (!mismatch) {
801 SMSC_TRACE(pdata, hw, "Successfully verified "
802 "loopback packet");
803 return 0;
804 } else {
805 SMSC_WARN(pdata, hw, "Data mismatch "
806 "during loop back test, will retry");
807 }
808 }
809 }
810
811 return -EIO;
812 }
813
smsc911x_phy_reset(struct smsc911x_data * pdata)814 static int smsc911x_phy_reset(struct smsc911x_data *pdata)
815 {
816 unsigned int temp;
817 unsigned int i = 100000;
818
819 temp = smsc911x_reg_read(pdata, PMT_CTRL);
820 smsc911x_reg_write(pdata, PMT_CTRL, temp | PMT_CTRL_PHY_RST_);
821 do {
822 msleep(1);
823 temp = smsc911x_reg_read(pdata, PMT_CTRL);
824 } while ((i--) && (temp & PMT_CTRL_PHY_RST_));
825
826 if (unlikely(temp & PMT_CTRL_PHY_RST_)) {
827 SMSC_WARN(pdata, hw, "PHY reset failed to complete");
828 return -EIO;
829 }
830 /* Extra delay required because the phy may not be completed with
831 * its reset when BMCR_RESET is cleared. Specs say 256 uS is
832 * enough delay but using 1ms here to be safe */
833 msleep(1);
834
835 return 0;
836 }
837
smsc911x_phy_loopbacktest(struct net_device * dev)838 static int smsc911x_phy_loopbacktest(struct net_device *dev)
839 {
840 struct smsc911x_data *pdata = netdev_priv(dev);
841 struct phy_device *phy_dev = dev->phydev;
842 int result = -EIO;
843 unsigned int i, val;
844 unsigned long flags;
845
846 /* Initialise tx packet using broadcast destination address */
847 eth_broadcast_addr(pdata->loopback_tx_pkt);
848
849 /* Use incrementing source address */
850 for (i = 6; i < 12; i++)
851 pdata->loopback_tx_pkt[i] = (char)i;
852
853 /* Set length type field */
854 pdata->loopback_tx_pkt[12] = 0x00;
855 pdata->loopback_tx_pkt[13] = 0x00;
856
857 for (i = 14; i < MIN_PACKET_SIZE; i++)
858 pdata->loopback_tx_pkt[i] = (char)i;
859
860 val = smsc911x_reg_read(pdata, HW_CFG);
861 val &= HW_CFG_TX_FIF_SZ_;
862 val |= HW_CFG_SF_;
863 smsc911x_reg_write(pdata, HW_CFG, val);
864
865 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
866 smsc911x_reg_write(pdata, RX_CFG,
867 (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8);
868
869 for (i = 0; i < 10; i++) {
870 /* Set PHY to 10/FD, no ANEG, and loopback mode */
871 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr,
872 MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX);
873
874 /* Enable MAC tx/rx, FD */
875 spin_lock_irqsave(&pdata->mac_lock, flags);
876 smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_
877 | MAC_CR_TXEN_ | MAC_CR_RXEN_);
878 spin_unlock_irqrestore(&pdata->mac_lock, flags);
879
880 if (smsc911x_phy_check_loopbackpkt(pdata) == 0) {
881 result = 0;
882 break;
883 }
884 pdata->resetcount++;
885
886 /* Disable MAC rx */
887 spin_lock_irqsave(&pdata->mac_lock, flags);
888 smsc911x_mac_write(pdata, MAC_CR, 0);
889 spin_unlock_irqrestore(&pdata->mac_lock, flags);
890
891 smsc911x_phy_reset(pdata);
892 }
893
894 /* Disable MAC */
895 spin_lock_irqsave(&pdata->mac_lock, flags);
896 smsc911x_mac_write(pdata, MAC_CR, 0);
897 spin_unlock_irqrestore(&pdata->mac_lock, flags);
898
899 /* Cancel PHY loopback mode */
900 smsc911x_mii_write(phy_dev->mdio.bus, phy_dev->mdio.addr, MII_BMCR, 0);
901
902 smsc911x_reg_write(pdata, TX_CFG, 0);
903 smsc911x_reg_write(pdata, RX_CFG, 0);
904
905 return result;
906 }
907 #endif /* USE_PHY_WORK_AROUND */
908
smsc911x_phy_update_flowcontrol(struct smsc911x_data * pdata)909 static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata)
910 {
911 struct net_device *ndev = pdata->dev;
912 struct phy_device *phy_dev = ndev->phydev;
913 u32 afc = smsc911x_reg_read(pdata, AFC_CFG);
914 u32 flow;
915 unsigned long flags;
916
917 if (phy_dev->duplex == DUPLEX_FULL) {
918 u16 lcladv = phy_read(phy_dev, MII_ADVERTISE);
919 u16 rmtadv = phy_read(phy_dev, MII_LPA);
920 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
921
922 if (cap & FLOW_CTRL_RX)
923 flow = 0xFFFF0002;
924 else
925 flow = 0;
926
927 if (cap & FLOW_CTRL_TX)
928 afc |= 0xF;
929 else
930 afc &= ~0xF;
931
932 SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s",
933 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
934 (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
935 } else {
936 SMSC_TRACE(pdata, hw, "half duplex");
937 flow = 0;
938 afc |= 0xF;
939 }
940
941 spin_lock_irqsave(&pdata->mac_lock, flags);
942 smsc911x_mac_write(pdata, FLOW, flow);
943 spin_unlock_irqrestore(&pdata->mac_lock, flags);
944
945 smsc911x_reg_write(pdata, AFC_CFG, afc);
946 }
947
948 /* Update link mode if anything has changed. Called periodically when the
949 * PHY is in polling mode, even if nothing has changed. */
smsc911x_phy_adjust_link(struct net_device * dev)950 static void smsc911x_phy_adjust_link(struct net_device *dev)
951 {
952 struct smsc911x_data *pdata = netdev_priv(dev);
953 struct phy_device *phy_dev = dev->phydev;
954 unsigned long flags;
955 int carrier;
956
957 if (phy_dev->duplex != pdata->last_duplex) {
958 unsigned int mac_cr;
959 SMSC_TRACE(pdata, hw, "duplex state has changed");
960
961 spin_lock_irqsave(&pdata->mac_lock, flags);
962 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
963 if (phy_dev->duplex) {
964 SMSC_TRACE(pdata, hw,
965 "configuring for full duplex mode");
966 mac_cr |= MAC_CR_FDPX_;
967 } else {
968 SMSC_TRACE(pdata, hw,
969 "configuring for half duplex mode");
970 mac_cr &= ~MAC_CR_FDPX_;
971 }
972 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
973 spin_unlock_irqrestore(&pdata->mac_lock, flags);
974
975 smsc911x_phy_update_flowcontrol(pdata);
976 pdata->last_duplex = phy_dev->duplex;
977 }
978
979 carrier = netif_carrier_ok(dev);
980 if (carrier != pdata->last_carrier) {
981 SMSC_TRACE(pdata, hw, "carrier state has changed");
982 if (carrier) {
983 SMSC_TRACE(pdata, hw, "configuring for carrier OK");
984 if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) &&
985 (!pdata->using_extphy)) {
986 /* Restore original GPIO configuration */
987 pdata->gpio_setting = pdata->gpio_orig_setting;
988 smsc911x_reg_write(pdata, GPIO_CFG,
989 pdata->gpio_setting);
990 }
991 } else {
992 SMSC_TRACE(pdata, hw, "configuring for no carrier");
993 /* Check global setting that LED1
994 * usage is 10/100 indicator */
995 pdata->gpio_setting = smsc911x_reg_read(pdata,
996 GPIO_CFG);
997 if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) &&
998 (!pdata->using_extphy)) {
999 /* Force 10/100 LED off, after saving
1000 * original GPIO configuration */
1001 pdata->gpio_orig_setting = pdata->gpio_setting;
1002
1003 pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_;
1004 pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_
1005 | GPIO_CFG_GPIODIR0_
1006 | GPIO_CFG_GPIOD0_);
1007 smsc911x_reg_write(pdata, GPIO_CFG,
1008 pdata->gpio_setting);
1009 }
1010 }
1011 pdata->last_carrier = carrier;
1012 }
1013 }
1014
smsc911x_mii_probe(struct net_device * dev)1015 static int smsc911x_mii_probe(struct net_device *dev)
1016 {
1017 struct smsc911x_data *pdata = netdev_priv(dev);
1018 struct phy_device *phydev;
1019 int ret;
1020
1021 /* find the first phy */
1022 phydev = phy_find_first(pdata->mii_bus);
1023 if (!phydev) {
1024 netdev_err(dev, "no PHY found\n");
1025 return -ENODEV;
1026 }
1027
1028 SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X",
1029 phydev->mdio.addr, phydev->phy_id);
1030
1031 ret = phy_connect_direct(dev, phydev, &smsc911x_phy_adjust_link,
1032 pdata->config.phy_interface);
1033
1034 if (ret) {
1035 netdev_err(dev, "Could not attach to PHY\n");
1036 return ret;
1037 }
1038
1039 phy_attached_info(phydev);
1040
1041 phy_set_max_speed(phydev, SPEED_100);
1042
1043 /* mask with MAC supported features */
1044 phy_support_asym_pause(phydev);
1045
1046 pdata->last_duplex = -1;
1047 pdata->last_carrier = -1;
1048
1049 #ifdef USE_PHY_WORK_AROUND
1050 if (smsc911x_phy_loopbacktest(dev) < 0) {
1051 SMSC_WARN(pdata, hw, "Failed Loop Back Test");
1052 phy_disconnect(phydev);
1053 return -ENODEV;
1054 }
1055 SMSC_TRACE(pdata, hw, "Passed Loop Back Test");
1056 #endif /* USE_PHY_WORK_AROUND */
1057
1058 SMSC_TRACE(pdata, hw, "phy initialised successfully");
1059 return 0;
1060 }
1061
smsc911x_mii_init(struct platform_device * pdev,struct net_device * dev)1062 static int smsc911x_mii_init(struct platform_device *pdev,
1063 struct net_device *dev)
1064 {
1065 struct smsc911x_data *pdata = netdev_priv(dev);
1066 struct phy_device *phydev;
1067 int err = -ENXIO;
1068
1069 pdata->mii_bus = mdiobus_alloc();
1070 if (!pdata->mii_bus) {
1071 err = -ENOMEM;
1072 goto err_out_1;
1073 }
1074
1075 pdata->mii_bus->name = SMSC_MDIONAME;
1076 snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1077 pdev->name, pdev->id);
1078 pdata->mii_bus->priv = pdata;
1079 pdata->mii_bus->read = smsc911x_mii_read;
1080 pdata->mii_bus->write = smsc911x_mii_write;
1081
1082 pdata->mii_bus->parent = &pdev->dev;
1083
1084 switch (pdata->idrev & 0xFFFF0000) {
1085 case 0x01170000:
1086 case 0x01150000:
1087 case 0x117A0000:
1088 case 0x115A0000:
1089 /* External PHY supported, try to autodetect */
1090 smsc911x_phy_initialise_external(pdata);
1091 break;
1092 default:
1093 SMSC_TRACE(pdata, hw, "External PHY is not supported, "
1094 "using internal PHY");
1095 pdata->using_extphy = 0;
1096 break;
1097 }
1098
1099 if (!pdata->using_extphy) {
1100 /* Mask all PHYs except ID 1 (internal) */
1101 pdata->mii_bus->phy_mask = ~(1 << 1);
1102 }
1103
1104 if (mdiobus_register(pdata->mii_bus)) {
1105 SMSC_WARN(pdata, probe, "Error registering mii bus");
1106 goto err_out_free_bus_2;
1107 }
1108
1109 phydev = phy_find_first(pdata->mii_bus);
1110 if (phydev)
1111 phydev->mac_managed_pm = true;
1112
1113 return 0;
1114
1115 err_out_free_bus_2:
1116 mdiobus_free(pdata->mii_bus);
1117 err_out_1:
1118 return err;
1119 }
1120
1121 /* Gets the number of tx statuses in the fifo */
smsc911x_tx_get_txstatcount(struct smsc911x_data * pdata)1122 static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata)
1123 {
1124 return (smsc911x_reg_read(pdata, TX_FIFO_INF)
1125 & TX_FIFO_INF_TSUSED_) >> 16;
1126 }
1127
1128 /* Reads tx statuses and increments counters where necessary */
smsc911x_tx_update_txcounters(struct net_device * dev)1129 static void smsc911x_tx_update_txcounters(struct net_device *dev)
1130 {
1131 struct smsc911x_data *pdata = netdev_priv(dev);
1132 unsigned int tx_stat;
1133
1134 while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) {
1135 if (unlikely(tx_stat & 0x80000000)) {
1136 /* In this driver the packet tag is used as the packet
1137 * length. Since a packet length can never reach the
1138 * size of 0x8000, this bit is reserved. It is worth
1139 * noting that the "reserved bit" in the warning above
1140 * does not reference a hardware defined reserved bit
1141 * but rather a driver defined one.
1142 */
1143 SMSC_WARN(pdata, hw, "Packet tag reserved bit is high");
1144 } else {
1145 if (unlikely(tx_stat & TX_STS_ES_)) {
1146 dev->stats.tx_errors++;
1147 } else {
1148 dev->stats.tx_packets++;
1149 dev->stats.tx_bytes += (tx_stat >> 16);
1150 }
1151 if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) {
1152 dev->stats.collisions += 16;
1153 dev->stats.tx_aborted_errors += 1;
1154 } else {
1155 dev->stats.collisions +=
1156 ((tx_stat >> 3) & 0xF);
1157 }
1158 if (unlikely(tx_stat & TX_STS_LOST_CARRIER_))
1159 dev->stats.tx_carrier_errors += 1;
1160 if (unlikely(tx_stat & TX_STS_LATE_COL_)) {
1161 dev->stats.collisions++;
1162 dev->stats.tx_aborted_errors++;
1163 }
1164 }
1165 }
1166 }
1167
1168 /* Increments the Rx error counters */
1169 static void
smsc911x_rx_counterrors(struct net_device * dev,unsigned int rxstat)1170 smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat)
1171 {
1172 int crc_err = 0;
1173
1174 if (unlikely(rxstat & RX_STS_ES_)) {
1175 dev->stats.rx_errors++;
1176 if (unlikely(rxstat & RX_STS_CRC_ERR_)) {
1177 dev->stats.rx_crc_errors++;
1178 crc_err = 1;
1179 }
1180 }
1181 if (likely(!crc_err)) {
1182 if (unlikely((rxstat & RX_STS_FRAME_TYPE_) &&
1183 (rxstat & RX_STS_LENGTH_ERR_)))
1184 dev->stats.rx_length_errors++;
1185 if (rxstat & RX_STS_MCAST_)
1186 dev->stats.multicast++;
1187 }
1188 }
1189
1190 /* Quickly dumps bad packets */
1191 static void
smsc911x_rx_fastforward(struct smsc911x_data * pdata,unsigned int pktwords)1192 smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktwords)
1193 {
1194 if (likely(pktwords >= 4)) {
1195 unsigned int timeout = 500;
1196 unsigned int val;
1197 smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_);
1198 do {
1199 udelay(1);
1200 val = smsc911x_reg_read(pdata, RX_DP_CTRL);
1201 } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout);
1202
1203 if (unlikely(timeout == 0))
1204 SMSC_WARN(pdata, hw, "Timed out waiting for "
1205 "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val);
1206 } else {
1207 while (pktwords--)
1208 smsc911x_reg_read(pdata, RX_DATA_FIFO);
1209 }
1210 }
1211
1212 /* NAPI poll function */
smsc911x_poll(struct napi_struct * napi,int budget)1213 static int smsc911x_poll(struct napi_struct *napi, int budget)
1214 {
1215 struct smsc911x_data *pdata =
1216 container_of(napi, struct smsc911x_data, napi);
1217 struct net_device *dev = pdata->dev;
1218 int npackets = 0;
1219
1220 while (npackets < budget) {
1221 unsigned int pktlength;
1222 unsigned int pktwords;
1223 struct sk_buff *skb;
1224 unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata);
1225
1226 if (!rxstat) {
1227 unsigned int temp;
1228 /* We processed all packets available. Tell NAPI it can
1229 * stop polling then re-enable rx interrupts */
1230 smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_);
1231 napi_complete(napi);
1232 temp = smsc911x_reg_read(pdata, INT_EN);
1233 temp |= INT_EN_RSFL_EN_;
1234 smsc911x_reg_write(pdata, INT_EN, temp);
1235 break;
1236 }
1237
1238 /* Count packet for NAPI scheduling, even if it has an error.
1239 * Error packets still require cycles to discard */
1240 npackets++;
1241
1242 pktlength = ((rxstat & 0x3FFF0000) >> 16);
1243 pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2;
1244 smsc911x_rx_counterrors(dev, rxstat);
1245
1246 if (unlikely(rxstat & RX_STS_ES_)) {
1247 SMSC_WARN(pdata, rx_err,
1248 "Discarding packet with error bit set");
1249 /* Packet has an error, discard it and continue with
1250 * the next */
1251 smsc911x_rx_fastforward(pdata, pktwords);
1252 dev->stats.rx_dropped++;
1253 continue;
1254 }
1255
1256 skb = netdev_alloc_skb(dev, pktwords << 2);
1257 if (unlikely(!skb)) {
1258 SMSC_WARN(pdata, rx_err,
1259 "Unable to allocate skb for rx packet");
1260 /* Drop the packet and stop this polling iteration */
1261 smsc911x_rx_fastforward(pdata, pktwords);
1262 dev->stats.rx_dropped++;
1263 break;
1264 }
1265
1266 pdata->ops->rx_readfifo(pdata,
1267 (unsigned int *)skb->data, pktwords);
1268
1269 /* Align IP on 16B boundary */
1270 skb_reserve(skb, NET_IP_ALIGN);
1271 skb_put(skb, pktlength - 4);
1272 skb->protocol = eth_type_trans(skb, dev);
1273 skb_checksum_none_assert(skb);
1274 netif_receive_skb(skb);
1275
1276 /* Update counters */
1277 dev->stats.rx_packets++;
1278 dev->stats.rx_bytes += (pktlength - 4);
1279 }
1280
1281 /* Return total received packets */
1282 return npackets;
1283 }
1284
1285 /* Returns hash bit number for given MAC address
1286 * Example:
1287 * 01 00 5E 00 00 01 -> returns bit number 31 */
smsc911x_hash(char addr[ETH_ALEN])1288 static unsigned int smsc911x_hash(char addr[ETH_ALEN])
1289 {
1290 return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
1291 }
1292
smsc911x_rx_multicast_update(struct smsc911x_data * pdata)1293 static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata)
1294 {
1295 /* Performs the multicast & mac_cr update. This is called when
1296 * safe on the current hardware, and with the mac_lock held */
1297 unsigned int mac_cr;
1298
1299 SMSC_ASSERT_MAC_LOCK(pdata);
1300
1301 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1302 mac_cr |= pdata->set_bits_mask;
1303 mac_cr &= ~(pdata->clear_bits_mask);
1304 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1305 smsc911x_mac_write(pdata, HASHH, pdata->hashhi);
1306 smsc911x_mac_write(pdata, HASHL, pdata->hashlo);
1307 SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X",
1308 mac_cr, pdata->hashhi, pdata->hashlo);
1309 }
1310
smsc911x_rx_multicast_update_workaround(struct smsc911x_data * pdata)1311 static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
1312 {
1313 unsigned int mac_cr;
1314
1315 /* This function is only called for older LAN911x devices
1316 * (revA or revB), where MAC_CR, HASHH and HASHL should not
1317 * be modified during Rx - newer devices immediately update the
1318 * registers.
1319 *
1320 * This is called from interrupt context */
1321
1322 spin_lock(&pdata->mac_lock);
1323
1324 /* Check Rx has stopped */
1325 if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_)
1326 SMSC_WARN(pdata, drv, "Rx not stopped");
1327
1328 /* Perform the update - safe to do now Rx has stopped */
1329 smsc911x_rx_multicast_update(pdata);
1330
1331 /* Re-enable Rx */
1332 mac_cr = smsc911x_mac_read(pdata, MAC_CR);
1333 mac_cr |= MAC_CR_RXEN_;
1334 smsc911x_mac_write(pdata, MAC_CR, mac_cr);
1335
1336 pdata->multicast_update_pending = 0;
1337
1338 spin_unlock(&pdata->mac_lock);
1339 }
1340
smsc911x_phy_general_power_up(struct smsc911x_data * pdata)1341 static int smsc911x_phy_general_power_up(struct smsc911x_data *pdata)
1342 {
1343 struct net_device *ndev = pdata->dev;
1344 struct phy_device *phy_dev = ndev->phydev;
1345 int rc = 0;
1346
1347 if (!phy_dev)
1348 return rc;
1349
1350 /* If the internal PHY is in General Power-Down mode, all, except the
1351 * management interface, is powered-down and stays in that condition as
1352 * long as Phy register bit 0.11 is HIGH.
1353 *
1354 * In that case, clear the bit 0.11, so the PHY powers up and we can
1355 * access to the phy registers.
1356 */
1357 rc = phy_read(phy_dev, MII_BMCR);
1358 if (rc < 0) {
1359 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1360 return rc;
1361 }
1362
1363 /* If the PHY general power-down bit is not set is not necessary to
1364 * disable the general power down-mode.
1365 */
1366 if (rc & BMCR_PDOWN) {
1367 rc = phy_write(phy_dev, MII_BMCR, rc & ~BMCR_PDOWN);
1368 if (rc < 0) {
1369 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1370 return rc;
1371 }
1372
1373 usleep_range(1000, 1500);
1374 }
1375
1376 return 0;
1377 }
1378
smsc911x_phy_disable_energy_detect(struct smsc911x_data * pdata)1379 static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
1380 {
1381 struct net_device *ndev = pdata->dev;
1382 struct phy_device *phy_dev = ndev->phydev;
1383 int rc = 0;
1384
1385 if (!phy_dev)
1386 return rc;
1387
1388 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1389
1390 if (rc < 0) {
1391 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1392 return rc;
1393 }
1394
1395 /* Only disable if energy detect mode is already enabled */
1396 if (rc & MII_LAN83C185_EDPWRDOWN) {
1397 /* Disable energy detect mode for this SMSC Transceivers */
1398 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1399 rc & (~MII_LAN83C185_EDPWRDOWN));
1400
1401 if (rc < 0) {
1402 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1403 return rc;
1404 }
1405 /* Allow PHY to wakeup */
1406 mdelay(2);
1407 }
1408
1409 return 0;
1410 }
1411
smsc911x_phy_enable_energy_detect(struct smsc911x_data * pdata)1412 static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
1413 {
1414 struct net_device *ndev = pdata->dev;
1415 struct phy_device *phy_dev = ndev->phydev;
1416 int rc = 0;
1417
1418 if (!phy_dev)
1419 return rc;
1420
1421 rc = phy_read(phy_dev, MII_LAN83C185_CTRL_STATUS);
1422
1423 if (rc < 0) {
1424 SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
1425 return rc;
1426 }
1427
1428 /* Only enable if energy detect mode is already disabled */
1429 if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
1430 /* Enable energy detect mode for this SMSC Transceivers */
1431 rc = phy_write(phy_dev, MII_LAN83C185_CTRL_STATUS,
1432 rc | MII_LAN83C185_EDPWRDOWN);
1433
1434 if (rc < 0) {
1435 SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
1436 return rc;
1437 }
1438 }
1439 return 0;
1440 }
1441
smsc911x_soft_reset(struct smsc911x_data * pdata)1442 static int smsc911x_soft_reset(struct smsc911x_data *pdata)
1443 {
1444 unsigned int timeout;
1445 unsigned int temp;
1446 int ret;
1447 unsigned int reset_offset = HW_CFG;
1448 unsigned int reset_mask = HW_CFG_SRST_;
1449
1450 /*
1451 * Make sure to power-up the PHY chip before doing a reset, otherwise
1452 * the reset fails.
1453 */
1454 ret = smsc911x_phy_general_power_up(pdata);
1455 if (ret) {
1456 SMSC_WARN(pdata, drv, "Failed to power-up the PHY chip");
1457 return ret;
1458 }
1459
1460 /*
1461 * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
1462 * are initialized in a Energy Detect Power-Down mode that prevents
1463 * the MAC chip to be software reseted. So we have to wakeup the PHY
1464 * before.
1465 */
1466 if (pdata->generation == 4) {
1467 ret = smsc911x_phy_disable_energy_detect(pdata);
1468
1469 if (ret) {
1470 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1471 return ret;
1472 }
1473 }
1474
1475 if ((pdata->idrev & 0xFFFF0000) == LAN9250) {
1476 /* special reset for LAN9250 */
1477 reset_offset = RESET_CTL;
1478 reset_mask = RESET_CTL_DIGITAL_RST_;
1479 }
1480
1481 /* Reset the LAN911x */
1482 smsc911x_reg_write(pdata, reset_offset, reset_mask);
1483
1484 /* verify reset bit is cleared */
1485 timeout = 10;
1486 do {
1487 udelay(10);
1488 temp = smsc911x_reg_read(pdata, reset_offset);
1489 } while ((--timeout) && (temp & reset_mask));
1490
1491 if (unlikely(temp & reset_mask)) {
1492 SMSC_WARN(pdata, drv, "Failed to complete reset");
1493 return -EIO;
1494 }
1495
1496 if (pdata->generation == 4) {
1497 ret = smsc911x_phy_enable_energy_detect(pdata);
1498
1499 if (ret) {
1500 SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
1501 return ret;
1502 }
1503 }
1504
1505 return 0;
1506 }
1507
1508 /* Sets the device MAC address to dev_addr, called with mac_lock held */
1509 static void
smsc911x_set_hw_mac_address(struct smsc911x_data * pdata,const u8 dev_addr[6])1510 smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, const u8 dev_addr[6])
1511 {
1512 u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4];
1513 u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
1514 (dev_addr[1] << 8) | dev_addr[0];
1515
1516 SMSC_ASSERT_MAC_LOCK(pdata);
1517
1518 smsc911x_mac_write(pdata, ADDRH, mac_high16);
1519 smsc911x_mac_write(pdata, ADDRL, mac_low32);
1520 }
1521
smsc911x_disable_irq_chip(struct net_device * dev)1522 static void smsc911x_disable_irq_chip(struct net_device *dev)
1523 {
1524 struct smsc911x_data *pdata = netdev_priv(dev);
1525
1526 smsc911x_reg_write(pdata, INT_EN, 0);
1527 smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF);
1528 }
1529
smsc911x_irqhandler(int irq,void * dev_id)1530 static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id)
1531 {
1532 struct net_device *dev = dev_id;
1533 struct smsc911x_data *pdata = netdev_priv(dev);
1534 u32 intsts = smsc911x_reg_read(pdata, INT_STS);
1535 u32 inten = smsc911x_reg_read(pdata, INT_EN);
1536 int serviced = IRQ_NONE;
1537 u32 temp;
1538
1539 if (unlikely(intsts & inten & INT_STS_SW_INT_)) {
1540 temp = smsc911x_reg_read(pdata, INT_EN);
1541 temp &= (~INT_EN_SW_INT_EN_);
1542 smsc911x_reg_write(pdata, INT_EN, temp);
1543 smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_);
1544 pdata->software_irq_signal = 1;
1545 smp_wmb();
1546 serviced = IRQ_HANDLED;
1547 }
1548
1549 if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) {
1550 /* Called when there is a multicast update scheduled and
1551 * it is now safe to complete the update */
1552 SMSC_TRACE(pdata, intr, "RX Stop interrupt");
1553 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_);
1554 if (pdata->multicast_update_pending)
1555 smsc911x_rx_multicast_update_workaround(pdata);
1556 serviced = IRQ_HANDLED;
1557 }
1558
1559 if (intsts & inten & INT_STS_TDFA_) {
1560 temp = smsc911x_reg_read(pdata, FIFO_INT);
1561 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1562 smsc911x_reg_write(pdata, FIFO_INT, temp);
1563 smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_);
1564 netif_wake_queue(dev);
1565 serviced = IRQ_HANDLED;
1566 }
1567
1568 if (unlikely(intsts & inten & INT_STS_RXE_)) {
1569 SMSC_TRACE(pdata, intr, "RX Error interrupt");
1570 smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_);
1571 serviced = IRQ_HANDLED;
1572 }
1573
1574 if (likely(intsts & inten & INT_STS_RSFL_)) {
1575 if (likely(napi_schedule_prep(&pdata->napi))) {
1576 /* Disable Rx interrupts */
1577 temp = smsc911x_reg_read(pdata, INT_EN);
1578 temp &= (~INT_EN_RSFL_EN_);
1579 smsc911x_reg_write(pdata, INT_EN, temp);
1580 /* Schedule a NAPI poll */
1581 __napi_schedule(&pdata->napi);
1582 } else {
1583 SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed");
1584 }
1585 serviced = IRQ_HANDLED;
1586 }
1587
1588 return serviced;
1589 }
1590
smsc911x_open(struct net_device * dev)1591 static int smsc911x_open(struct net_device *dev)
1592 {
1593 struct smsc911x_data *pdata = netdev_priv(dev);
1594 unsigned int timeout;
1595 unsigned int temp;
1596 unsigned int intcfg;
1597 int retval;
1598 int irq_flags;
1599
1600 pm_runtime_get_sync(dev->dev.parent);
1601
1602 /* find and start the given phy */
1603 if (!dev->phydev) {
1604 retval = smsc911x_mii_probe(dev);
1605 if (retval < 0) {
1606 SMSC_WARN(pdata, probe, "Error starting phy");
1607 goto out;
1608 }
1609 }
1610
1611 /* Reset the LAN911x */
1612 retval = smsc911x_soft_reset(pdata);
1613 if (retval) {
1614 SMSC_WARN(pdata, hw, "soft reset failed");
1615 goto mii_free_out;
1616 }
1617
1618 smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
1619 smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
1620
1621 /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
1622 spin_lock_irq(&pdata->mac_lock);
1623 smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
1624 spin_unlock_irq(&pdata->mac_lock);
1625
1626 /* Make sure EEPROM has finished loading before setting GPIO_CFG */
1627 timeout = 50;
1628 while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
1629 --timeout) {
1630 udelay(10);
1631 }
1632
1633 if (unlikely(timeout == 0))
1634 SMSC_WARN(pdata, ifup,
1635 "Timed out waiting for EEPROM busy bit to clear");
1636
1637 smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000);
1638
1639 /* The soft reset above cleared the device's MAC address,
1640 * restore it from local copy (set in probe) */
1641 spin_lock_irq(&pdata->mac_lock);
1642 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1643 spin_unlock_irq(&pdata->mac_lock);
1644
1645 /* Initialise irqs, but leave all sources disabled */
1646 smsc911x_disable_irq_chip(dev);
1647
1648 /* Set interrupt deassertion to 100uS */
1649 intcfg = ((10 << 24) | INT_CFG_IRQ_EN_);
1650
1651 if (pdata->config.irq_polarity) {
1652 SMSC_TRACE(pdata, ifup, "irq polarity: active high");
1653 intcfg |= INT_CFG_IRQ_POL_;
1654 } else {
1655 SMSC_TRACE(pdata, ifup, "irq polarity: active low");
1656 }
1657
1658 if (pdata->config.irq_type) {
1659 SMSC_TRACE(pdata, ifup, "irq type: push-pull");
1660 intcfg |= INT_CFG_IRQ_TYPE_;
1661 } else {
1662 SMSC_TRACE(pdata, ifup, "irq type: open drain");
1663 }
1664
1665 smsc911x_reg_write(pdata, INT_CFG, intcfg);
1666
1667 SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq);
1668 pdata->software_irq_signal = 0;
1669 smp_wmb();
1670
1671 irq_flags = irq_get_trigger_type(dev->irq);
1672 retval = request_irq(dev->irq, smsc911x_irqhandler,
1673 irq_flags | IRQF_SHARED, dev->name, dev);
1674 if (retval) {
1675 SMSC_WARN(pdata, probe,
1676 "Unable to claim requested irq: %d", dev->irq);
1677 goto mii_free_out;
1678 }
1679
1680 temp = smsc911x_reg_read(pdata, INT_EN);
1681 temp |= INT_EN_SW_INT_EN_;
1682 smsc911x_reg_write(pdata, INT_EN, temp);
1683
1684 timeout = 1000;
1685 while (timeout--) {
1686 if (pdata->software_irq_signal)
1687 break;
1688 msleep(1);
1689 }
1690
1691 if (!pdata->software_irq_signal) {
1692 netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n",
1693 dev->irq);
1694 retval = -ENODEV;
1695 goto irq_stop_out;
1696 }
1697 SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d",
1698 dev->irq);
1699
1700 netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n",
1701 (unsigned long)pdata->ioaddr, dev->irq);
1702
1703 /* Reset the last known duplex and carrier */
1704 pdata->last_duplex = -1;
1705 pdata->last_carrier = -1;
1706
1707 /* Bring the PHY up */
1708 phy_start(dev->phydev);
1709
1710 temp = smsc911x_reg_read(pdata, HW_CFG);
1711 /* Preserve TX FIFO size and external PHY configuration */
1712 temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF);
1713 temp |= HW_CFG_SF_;
1714 smsc911x_reg_write(pdata, HW_CFG, temp);
1715
1716 temp = smsc911x_reg_read(pdata, FIFO_INT);
1717 temp |= FIFO_INT_TX_AVAIL_LEVEL_;
1718 temp &= ~(FIFO_INT_RX_STS_LEVEL_);
1719 smsc911x_reg_write(pdata, FIFO_INT, temp);
1720
1721 /* set RX Data offset to 2 bytes for alignment */
1722 smsc911x_reg_write(pdata, RX_CFG, (NET_IP_ALIGN << 8));
1723
1724 /* enable NAPI polling before enabling RX interrupts */
1725 napi_enable(&pdata->napi);
1726
1727 temp = smsc911x_reg_read(pdata, INT_EN);
1728 temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_);
1729 smsc911x_reg_write(pdata, INT_EN, temp);
1730
1731 spin_lock_irq(&pdata->mac_lock);
1732 temp = smsc911x_mac_read(pdata, MAC_CR);
1733 temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_);
1734 smsc911x_mac_write(pdata, MAC_CR, temp);
1735 spin_unlock_irq(&pdata->mac_lock);
1736
1737 smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_);
1738
1739 netif_start_queue(dev);
1740 return 0;
1741
1742 irq_stop_out:
1743 free_irq(dev->irq, dev);
1744 mii_free_out:
1745 phy_disconnect(dev->phydev);
1746 out:
1747 pm_runtime_put(dev->dev.parent);
1748 return retval;
1749 }
1750
1751 /* Entry point for stopping the interface */
smsc911x_stop(struct net_device * dev)1752 static int smsc911x_stop(struct net_device *dev)
1753 {
1754 struct smsc911x_data *pdata = netdev_priv(dev);
1755 unsigned int temp;
1756
1757 /* Disable all device interrupts */
1758 temp = smsc911x_reg_read(pdata, INT_CFG);
1759 temp &= ~INT_CFG_IRQ_EN_;
1760 smsc911x_reg_write(pdata, INT_CFG, temp);
1761
1762 /* Stop Tx and Rx polling */
1763 netif_stop_queue(dev);
1764 napi_disable(&pdata->napi);
1765
1766 /* At this point all Rx and Tx activity is stopped */
1767 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1768 smsc911x_tx_update_txcounters(dev);
1769
1770 free_irq(dev->irq, dev);
1771
1772 /* Bring the PHY down */
1773 if (dev->phydev) {
1774 phy_stop(dev->phydev);
1775 phy_disconnect(dev->phydev);
1776 }
1777 netif_carrier_off(dev);
1778 pm_runtime_put(dev->dev.parent);
1779
1780 SMSC_TRACE(pdata, ifdown, "Interface stopped");
1781 return 0;
1782 }
1783
1784 /* Entry point for transmitting a packet */
1785 static netdev_tx_t
smsc911x_hard_start_xmit(struct sk_buff * skb,struct net_device * dev)1786 smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1787 {
1788 struct smsc911x_data *pdata = netdev_priv(dev);
1789 unsigned int freespace;
1790 unsigned int tx_cmd_a;
1791 unsigned int tx_cmd_b;
1792 unsigned int temp;
1793 u32 wrsz;
1794 ulong bufp;
1795
1796 freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_;
1797
1798 if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD))
1799 SMSC_WARN(pdata, tx_err,
1800 "Tx data fifo low, space available: %d", freespace);
1801
1802 /* Word alignment adjustment */
1803 tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16;
1804 tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
1805 tx_cmd_a |= (unsigned int)skb->len;
1806
1807 tx_cmd_b = ((unsigned int)skb->len) << 16;
1808 tx_cmd_b |= (unsigned int)skb->len;
1809
1810 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a);
1811 smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b);
1812
1813 bufp = (ulong)skb->data & (~0x3);
1814 wrsz = (u32)skb->len + 3;
1815 wrsz += (u32)((ulong)skb->data & 0x3);
1816 wrsz >>= 2;
1817
1818 pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz);
1819 freespace -= (skb->len + 32);
1820 skb_tx_timestamp(skb);
1821 dev_consume_skb_any(skb);
1822
1823 if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30))
1824 smsc911x_tx_update_txcounters(dev);
1825
1826 if (freespace < TX_FIFO_LOW_THRESHOLD) {
1827 netif_stop_queue(dev);
1828 temp = smsc911x_reg_read(pdata, FIFO_INT);
1829 temp &= 0x00FFFFFF;
1830 temp |= 0x32000000;
1831 smsc911x_reg_write(pdata, FIFO_INT, temp);
1832 }
1833
1834 return NETDEV_TX_OK;
1835 }
1836
1837 /* Entry point for getting status counters */
smsc911x_get_stats(struct net_device * dev)1838 static struct net_device_stats *smsc911x_get_stats(struct net_device *dev)
1839 {
1840 struct smsc911x_data *pdata = netdev_priv(dev);
1841 smsc911x_tx_update_txcounters(dev);
1842 dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP);
1843 return &dev->stats;
1844 }
1845
1846 /* Entry point for setting addressing modes */
smsc911x_set_multicast_list(struct net_device * dev)1847 static void smsc911x_set_multicast_list(struct net_device *dev)
1848 {
1849 struct smsc911x_data *pdata = netdev_priv(dev);
1850 unsigned long flags;
1851
1852 if (dev->flags & IFF_PROMISC) {
1853 /* Enabling promiscuous mode */
1854 pdata->set_bits_mask = MAC_CR_PRMS_;
1855 pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1856 pdata->hashhi = 0;
1857 pdata->hashlo = 0;
1858 } else if (dev->flags & IFF_ALLMULTI) {
1859 /* Enabling all multicast mode */
1860 pdata->set_bits_mask = MAC_CR_MCPAS_;
1861 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_);
1862 pdata->hashhi = 0;
1863 pdata->hashlo = 0;
1864 } else if (!netdev_mc_empty(dev)) {
1865 /* Enabling specific multicast addresses */
1866 unsigned int hash_high = 0;
1867 unsigned int hash_low = 0;
1868 struct netdev_hw_addr *ha;
1869
1870 pdata->set_bits_mask = MAC_CR_HPFILT_;
1871 pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_);
1872
1873 netdev_for_each_mc_addr(ha, dev) {
1874 unsigned int bitnum = smsc911x_hash(ha->addr);
1875 unsigned int mask = 0x01 << (bitnum & 0x1F);
1876
1877 if (bitnum & 0x20)
1878 hash_high |= mask;
1879 else
1880 hash_low |= mask;
1881 }
1882
1883 pdata->hashhi = hash_high;
1884 pdata->hashlo = hash_low;
1885 } else {
1886 /* Enabling local MAC address only */
1887 pdata->set_bits_mask = 0;
1888 pdata->clear_bits_mask =
1889 (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
1890 pdata->hashhi = 0;
1891 pdata->hashlo = 0;
1892 }
1893
1894 spin_lock_irqsave(&pdata->mac_lock, flags);
1895
1896 if (pdata->generation <= 1) {
1897 /* Older hardware revision - cannot change these flags while
1898 * receiving data */
1899 if (!pdata->multicast_update_pending) {
1900 unsigned int temp;
1901 SMSC_TRACE(pdata, hw, "scheduling mcast update");
1902 pdata->multicast_update_pending = 1;
1903
1904 /* Request the hardware to stop, then perform the
1905 * update when we get an RX_STOP interrupt */
1906 temp = smsc911x_mac_read(pdata, MAC_CR);
1907 temp &= ~(MAC_CR_RXEN_);
1908 smsc911x_mac_write(pdata, MAC_CR, temp);
1909 } else {
1910 /* There is another update pending, this should now
1911 * use the newer values */
1912 }
1913 } else {
1914 /* Newer hardware revision - can write immediately */
1915 smsc911x_rx_multicast_update(pdata);
1916 }
1917
1918 spin_unlock_irqrestore(&pdata->mac_lock, flags);
1919 }
1920
1921 #ifdef CONFIG_NET_POLL_CONTROLLER
smsc911x_poll_controller(struct net_device * dev)1922 static void smsc911x_poll_controller(struct net_device *dev)
1923 {
1924 disable_irq(dev->irq);
1925 smsc911x_irqhandler(0, dev);
1926 enable_irq(dev->irq);
1927 }
1928 #endif /* CONFIG_NET_POLL_CONTROLLER */
1929
smsc911x_set_mac_address(struct net_device * dev,void * p)1930 static int smsc911x_set_mac_address(struct net_device *dev, void *p)
1931 {
1932 struct smsc911x_data *pdata = netdev_priv(dev);
1933 struct sockaddr *addr = p;
1934
1935 /* On older hardware revisions we cannot change the mac address
1936 * registers while receiving data. Newer devices can safely change
1937 * this at any time. */
1938 if (pdata->generation <= 1 && netif_running(dev))
1939 return -EBUSY;
1940
1941 if (!is_valid_ether_addr(addr->sa_data))
1942 return -EADDRNOTAVAIL;
1943
1944 eth_hw_addr_set(dev, addr->sa_data);
1945
1946 spin_lock_irq(&pdata->mac_lock);
1947 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
1948 spin_unlock_irq(&pdata->mac_lock);
1949
1950 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
1951
1952 return 0;
1953 }
1954
smsc911x_ethtool_getdrvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1955 static void smsc911x_ethtool_getdrvinfo(struct net_device *dev,
1956 struct ethtool_drvinfo *info)
1957 {
1958 strscpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver));
1959 strscpy(info->version, SMSC_DRV_VERSION, sizeof(info->version));
1960 strscpy(info->bus_info, dev_name(dev->dev.parent),
1961 sizeof(info->bus_info));
1962 }
1963
smsc911x_ethtool_getmsglevel(struct net_device * dev)1964 static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev)
1965 {
1966 struct smsc911x_data *pdata = netdev_priv(dev);
1967 return pdata->msg_enable;
1968 }
1969
smsc911x_ethtool_setmsglevel(struct net_device * dev,u32 level)1970 static 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
smsc911x_ethtool_getregslen(struct net_device * dev)1976 static 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
1982 static void
smsc911x_ethtool_getregs(struct net_device * dev,struct ethtool_regs * regs,void * buf)1983 smsc911x_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
smsc911x_eeprom_enable_access(struct smsc911x_data * pdata)2008 static 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
smsc911x_eeprom_send_cmd(struct smsc911x_data * pdata,u32 op)2016 static 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
smsc911x_eeprom_read_location(struct smsc911x_data * pdata,u8 address,u8 * data)2048 static 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
smsc911x_eeprom_write_location(struct smsc911x_data * pdata,u8 address,u8 data)2063 static 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 int ret;
2068
2069 SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data);
2070 ret = smsc911x_eeprom_send_cmd(pdata, op);
2071
2072 if (!ret) {
2073 op = E2P_CMD_EPC_CMD_WRITE_ | address;
2074 smsc911x_reg_write(pdata, E2P_DATA, (u32)data);
2075
2076 /* Workaround for hardware read-after-write restriction */
2077 smsc911x_reg_read(pdata, BYTE_TEST);
2078
2079 ret = smsc911x_eeprom_send_cmd(pdata, op);
2080 }
2081
2082 return ret;
2083 }
2084
smsc911x_ethtool_get_eeprom_len(struct net_device * dev)2085 static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev)
2086 {
2087 return SMSC911X_EEPROM_SIZE;
2088 }
2089
smsc911x_ethtool_get_eeprom(struct net_device * dev,struct ethtool_eeprom * eeprom,u8 * data)2090 static int smsc911x_ethtool_get_eeprom(struct net_device *dev,
2091 struct ethtool_eeprom *eeprom, u8 *data)
2092 {
2093 struct smsc911x_data *pdata = netdev_priv(dev);
2094 u8 eeprom_data[SMSC911X_EEPROM_SIZE];
2095 int len;
2096 int i;
2097
2098 smsc911x_eeprom_enable_access(pdata);
2099
2100 len = min(eeprom->len, SMSC911X_EEPROM_SIZE);
2101 for (i = 0; i < len; i++) {
2102 int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data);
2103 if (ret < 0) {
2104 eeprom->len = 0;
2105 return ret;
2106 }
2107 }
2108
2109 memcpy(data, &eeprom_data[eeprom->offset], len);
2110 eeprom->len = len;
2111 return 0;
2112 }
2113
smsc911x_ethtool_set_eeprom(struct net_device * dev,struct ethtool_eeprom * eeprom,u8 * data)2114 static int smsc911x_ethtool_set_eeprom(struct net_device *dev,
2115 struct ethtool_eeprom *eeprom, u8 *data)
2116 {
2117 int ret;
2118 struct smsc911x_data *pdata = netdev_priv(dev);
2119
2120 smsc911x_eeprom_enable_access(pdata);
2121 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_);
2122 ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data);
2123 smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_);
2124
2125 /* Single byte write, according to man page */
2126 eeprom->len = 1;
2127
2128 return ret;
2129 }
2130
2131 static const struct ethtool_ops smsc911x_ethtool_ops = {
2132 .get_link = ethtool_op_get_link,
2133 .get_drvinfo = smsc911x_ethtool_getdrvinfo,
2134 .nway_reset = phy_ethtool_nway_reset,
2135 .get_msglevel = smsc911x_ethtool_getmsglevel,
2136 .set_msglevel = smsc911x_ethtool_setmsglevel,
2137 .get_regs_len = smsc911x_ethtool_getregslen,
2138 .get_regs = smsc911x_ethtool_getregs,
2139 .get_eeprom_len = smsc911x_ethtool_get_eeprom_len,
2140 .get_eeprom = smsc911x_ethtool_get_eeprom,
2141 .set_eeprom = smsc911x_ethtool_set_eeprom,
2142 .get_ts_info = ethtool_op_get_ts_info,
2143 .get_link_ksettings = phy_ethtool_get_link_ksettings,
2144 .set_link_ksettings = phy_ethtool_set_link_ksettings,
2145 };
2146
2147 static const struct net_device_ops smsc911x_netdev_ops = {
2148 .ndo_open = smsc911x_open,
2149 .ndo_stop = smsc911x_stop,
2150 .ndo_start_xmit = smsc911x_hard_start_xmit,
2151 .ndo_get_stats = smsc911x_get_stats,
2152 .ndo_set_rx_mode = smsc911x_set_multicast_list,
2153 .ndo_eth_ioctl = phy_do_ioctl_running,
2154 .ndo_validate_addr = eth_validate_addr,
2155 .ndo_set_mac_address = smsc911x_set_mac_address,
2156 #ifdef CONFIG_NET_POLL_CONTROLLER
2157 .ndo_poll_controller = smsc911x_poll_controller,
2158 #endif
2159 };
2160
2161 /* copies the current mac address from hardware to dev->dev_addr */
smsc911x_read_mac_address(struct net_device * dev)2162 static void smsc911x_read_mac_address(struct net_device *dev)
2163 {
2164 struct smsc911x_data *pdata = netdev_priv(dev);
2165 u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH);
2166 u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL);
2167 u8 addr[ETH_ALEN];
2168
2169 addr[0] = (u8)(mac_low32);
2170 addr[1] = (u8)(mac_low32 >> 8);
2171 addr[2] = (u8)(mac_low32 >> 16);
2172 addr[3] = (u8)(mac_low32 >> 24);
2173 addr[4] = (u8)(mac_high16);
2174 addr[5] = (u8)(mac_high16 >> 8);
2175 eth_hw_addr_set(dev, addr);
2176 }
2177
2178 /* Initializing private device structures, only called from probe */
smsc911x_init(struct net_device * dev)2179 static int smsc911x_init(struct net_device *dev)
2180 {
2181 struct smsc911x_data *pdata = netdev_priv(dev);
2182 unsigned int byte_test, mask;
2183 unsigned int to = 100;
2184
2185 SMSC_TRACE(pdata, probe, "Driver Parameters:");
2186 SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX",
2187 (unsigned long)pdata->ioaddr);
2188 SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq);
2189 SMSC_TRACE(pdata, probe, "PHY will be autodetected.");
2190
2191 spin_lock_init(&pdata->dev_lock);
2192 spin_lock_init(&pdata->mac_lock);
2193
2194 if (pdata->ioaddr == NULL) {
2195 SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000");
2196 return -ENODEV;
2197 }
2198
2199 /*
2200 * poll the READY bit in PMT_CTRL. Any other access to the device is
2201 * forbidden while this bit isn't set. Try for 100ms
2202 *
2203 * Note that this test is done before the WORD_SWAP register is
2204 * programmed. So in some configurations the READY bit is at 16 before
2205 * WORD_SWAP is written to. This issue is worked around by waiting
2206 * until either bit 0 or bit 16 gets set in PMT_CTRL.
2207 *
2208 * SMSC has confirmed that checking bit 16 (marked as reserved in
2209 * the datasheet) is fine since these bits "will either never be set
2210 * or can only go high after READY does (so also indicate the device
2211 * is ready)".
2212 */
2213
2214 mask = PMT_CTRL_READY_ | swahw32(PMT_CTRL_READY_);
2215 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & mask) && --to)
2216 udelay(1000);
2217
2218 if (to == 0) {
2219 netdev_err(dev, "Device not READY in 100ms aborting\n");
2220 return -ENODEV;
2221 }
2222
2223 /* Check byte ordering */
2224 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2225 SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test);
2226 if (byte_test == 0x43218765) {
2227 SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, "
2228 "applying WORD_SWAP");
2229 smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff);
2230
2231 /* 1 dummy read of BYTE_TEST is needed after a write to
2232 * WORD_SWAP before its contents are valid */
2233 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2234
2235 byte_test = smsc911x_reg_read(pdata, BYTE_TEST);
2236 }
2237
2238 if (byte_test != 0x87654321) {
2239 SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test);
2240 if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) {
2241 SMSC_WARN(pdata, probe,
2242 "top 16 bits equal to bottom 16 bits");
2243 SMSC_TRACE(pdata, probe,
2244 "This may mean the chip is set "
2245 "for 32 bit while the bus is reading 16 bit");
2246 }
2247 return -ENODEV;
2248 }
2249
2250 /* Default generation to zero (all workarounds apply) */
2251 pdata->generation = 0;
2252
2253 pdata->idrev = smsc911x_reg_read(pdata, ID_REV);
2254 switch (pdata->idrev & 0xFFFF0000) {
2255 case LAN9118:
2256 case LAN9117:
2257 case LAN9116:
2258 case LAN9115:
2259 case LAN89218:
2260 /* LAN911[5678] family */
2261 pdata->generation = pdata->idrev & 0x0000FFFF;
2262 break;
2263
2264 case LAN9218:
2265 case LAN9217:
2266 case LAN9216:
2267 case LAN9215:
2268 /* LAN921[5678] family */
2269 pdata->generation = 3;
2270 break;
2271
2272 case LAN9210:
2273 case LAN9211:
2274 case LAN9220:
2275 case LAN9221:
2276 case LAN9250:
2277 /* LAN9210/LAN9211/LAN9220/LAN9221/LAN9250 */
2278 pdata->generation = 4;
2279 break;
2280
2281 default:
2282 SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X",
2283 pdata->idrev);
2284 return -ENODEV;
2285 }
2286
2287 SMSC_TRACE(pdata, probe,
2288 "LAN911x identified, idrev: 0x%08X, generation: %d",
2289 pdata->idrev, pdata->generation);
2290
2291 if (pdata->generation == 0)
2292 SMSC_WARN(pdata, probe,
2293 "This driver is not intended for this chip revision");
2294
2295 /* workaround for platforms without an eeprom, where the mac address
2296 * is stored elsewhere and set by the bootloader. This saves the
2297 * mac address before resetting the device */
2298 if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) {
2299 spin_lock_irq(&pdata->mac_lock);
2300 smsc911x_read_mac_address(dev);
2301 spin_unlock_irq(&pdata->mac_lock);
2302 }
2303
2304 /* Reset the LAN911x */
2305 if (smsc911x_phy_reset(pdata) || smsc911x_soft_reset(pdata))
2306 return -ENODEV;
2307
2308 dev->flags |= IFF_MULTICAST;
2309 netif_napi_add_weight(dev, &pdata->napi, smsc911x_poll,
2310 SMSC_NAPI_WEIGHT);
2311 dev->netdev_ops = &smsc911x_netdev_ops;
2312 dev->ethtool_ops = &smsc911x_ethtool_ops;
2313
2314 return 0;
2315 }
2316
smsc911x_drv_remove(struct platform_device * pdev)2317 static int smsc911x_drv_remove(struct platform_device *pdev)
2318 {
2319 struct net_device *dev;
2320 struct smsc911x_data *pdata;
2321 struct resource *res;
2322
2323 dev = platform_get_drvdata(pdev);
2324 BUG_ON(!dev);
2325 pdata = netdev_priv(dev);
2326 BUG_ON(!pdata);
2327 BUG_ON(!pdata->ioaddr);
2328
2329 SMSC_TRACE(pdata, ifdown, "Stopping driver");
2330
2331 unregister_netdev(dev);
2332
2333 mdiobus_unregister(pdata->mii_bus);
2334 mdiobus_free(pdata->mii_bus);
2335
2336 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2337 "smsc911x-memory");
2338 if (!res)
2339 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2340
2341 release_mem_region(res->start, resource_size(res));
2342
2343 iounmap(pdata->ioaddr);
2344
2345 (void)smsc911x_disable_resources(pdev);
2346 smsc911x_free_resources(pdev);
2347
2348 free_netdev(dev);
2349
2350 pm_runtime_disable(&pdev->dev);
2351
2352 return 0;
2353 }
2354
2355 /* standard register acces */
2356 static const struct smsc911x_ops standard_smsc911x_ops = {
2357 .reg_read = __smsc911x_reg_read,
2358 .reg_write = __smsc911x_reg_write,
2359 .rx_readfifo = smsc911x_rx_readfifo,
2360 .tx_writefifo = smsc911x_tx_writefifo,
2361 };
2362
2363 /* shifted register access */
2364 static const struct smsc911x_ops shifted_smsc911x_ops = {
2365 .reg_read = __smsc911x_reg_read_shift,
2366 .reg_write = __smsc911x_reg_write_shift,
2367 .rx_readfifo = smsc911x_rx_readfifo_shift,
2368 .tx_writefifo = smsc911x_tx_writefifo_shift,
2369 };
2370
smsc911x_probe_config(struct smsc911x_platform_config * config,struct device * dev)2371 static int smsc911x_probe_config(struct smsc911x_platform_config *config,
2372 struct device *dev)
2373 {
2374 int phy_interface;
2375 u32 width = 0;
2376 int err;
2377
2378 phy_interface = device_get_phy_mode(dev);
2379 if (phy_interface < 0)
2380 phy_interface = PHY_INTERFACE_MODE_NA;
2381 config->phy_interface = phy_interface;
2382
2383 device_get_mac_address(dev, config->mac);
2384
2385 err = device_property_read_u32(dev, "reg-io-width", &width);
2386 if (err == -ENXIO)
2387 return err;
2388 if (!err && width == 4)
2389 config->flags |= SMSC911X_USE_32BIT;
2390 else
2391 config->flags |= SMSC911X_USE_16BIT;
2392
2393 device_property_read_u32(dev, "reg-shift", &config->shift);
2394
2395 if (device_property_present(dev, "smsc,irq-active-high"))
2396 config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH;
2397
2398 if (device_property_present(dev, "smsc,irq-push-pull"))
2399 config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL;
2400
2401 if (device_property_present(dev, "smsc,force-internal-phy"))
2402 config->flags |= SMSC911X_FORCE_INTERNAL_PHY;
2403
2404 if (device_property_present(dev, "smsc,force-external-phy"))
2405 config->flags |= SMSC911X_FORCE_EXTERNAL_PHY;
2406
2407 if (device_property_present(dev, "smsc,save-mac-address"))
2408 config->flags |= SMSC911X_SAVE_MAC_ADDRESS;
2409
2410 return 0;
2411 }
2412
smsc911x_drv_probe(struct platform_device * pdev)2413 static int smsc911x_drv_probe(struct platform_device *pdev)
2414 {
2415 struct net_device *dev;
2416 struct smsc911x_data *pdata;
2417 struct smsc911x_platform_config *config = dev_get_platdata(&pdev->dev);
2418 struct resource *res;
2419 int res_size, irq;
2420 int retval;
2421
2422 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
2423 "smsc911x-memory");
2424 if (!res)
2425 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2426 if (!res) {
2427 pr_warn("Could not allocate resource\n");
2428 retval = -ENODEV;
2429 goto out_0;
2430 }
2431 res_size = resource_size(res);
2432
2433 irq = platform_get_irq(pdev, 0);
2434 if (irq == -EPROBE_DEFER) {
2435 retval = -EPROBE_DEFER;
2436 goto out_0;
2437 } else if (irq < 0) {
2438 pr_warn("Could not allocate irq resource\n");
2439 retval = -ENODEV;
2440 goto out_0;
2441 }
2442
2443 if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) {
2444 retval = -EBUSY;
2445 goto out_0;
2446 }
2447
2448 dev = alloc_etherdev(sizeof(struct smsc911x_data));
2449 if (!dev) {
2450 retval = -ENOMEM;
2451 goto out_release_io_1;
2452 }
2453
2454 SET_NETDEV_DEV(dev, &pdev->dev);
2455
2456 pdata = netdev_priv(dev);
2457 dev->irq = irq;
2458 pdata->ioaddr = ioremap(res->start, res_size);
2459 if (!pdata->ioaddr) {
2460 retval = -ENOMEM;
2461 goto out_ioremap_fail;
2462 }
2463
2464 pdata->dev = dev;
2465 pdata->msg_enable = ((1 << debug) - 1);
2466
2467 platform_set_drvdata(pdev, dev);
2468
2469 retval = smsc911x_request_resources(pdev);
2470 if (retval)
2471 goto out_request_resources_fail;
2472
2473 retval = smsc911x_enable_resources(pdev);
2474 if (retval)
2475 goto out_enable_resources_fail;
2476
2477 if (pdata->ioaddr == NULL) {
2478 SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
2479 retval = -ENOMEM;
2480 goto out_disable_resources;
2481 }
2482
2483 retval = smsc911x_probe_config(&pdata->config, &pdev->dev);
2484 if (retval && config) {
2485 /* copy config parameters across to pdata */
2486 memcpy(&pdata->config, config, sizeof(pdata->config));
2487 retval = 0;
2488 }
2489
2490 if (retval) {
2491 SMSC_WARN(pdata, probe, "Error smsc911x config not found");
2492 goto out_disable_resources;
2493 }
2494
2495 /* assume standard, non-shifted, access to HW registers */
2496 pdata->ops = &standard_smsc911x_ops;
2497 /* apply the right access if shifting is needed */
2498 if (pdata->config.shift)
2499 pdata->ops = &shifted_smsc911x_ops;
2500
2501 pm_runtime_enable(&pdev->dev);
2502 pm_runtime_get_sync(&pdev->dev);
2503
2504 retval = smsc911x_init(dev);
2505 if (retval < 0)
2506 goto out_init_fail;
2507
2508 netif_carrier_off(dev);
2509
2510 retval = smsc911x_mii_init(pdev, dev);
2511 if (retval) {
2512 SMSC_WARN(pdata, probe, "Error %i initialising mii", retval);
2513 goto out_init_fail;
2514 }
2515
2516 retval = register_netdev(dev);
2517 if (retval) {
2518 SMSC_WARN(pdata, probe, "Error %i registering device", retval);
2519 goto out_init_fail;
2520 } else {
2521 SMSC_TRACE(pdata, probe,
2522 "Network interface: \"%s\"", dev->name);
2523 }
2524
2525 spin_lock_irq(&pdata->mac_lock);
2526
2527 /* Check if mac address has been specified when bringing interface up */
2528 if (is_valid_ether_addr(dev->dev_addr)) {
2529 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2530 SMSC_TRACE(pdata, probe,
2531 "MAC Address is specified by configuration");
2532 } else if (is_valid_ether_addr(pdata->config.mac)) {
2533 eth_hw_addr_set(dev, pdata->config.mac);
2534 SMSC_TRACE(pdata, probe,
2535 "MAC Address specified by platform data");
2536 } else {
2537 /* Try reading mac address from device. if EEPROM is present
2538 * it will already have been set */
2539 smsc_get_mac(dev);
2540
2541 if (is_valid_ether_addr(dev->dev_addr)) {
2542 /* eeprom values are valid so use them */
2543 SMSC_TRACE(pdata, probe,
2544 "Mac Address is read from LAN911x EEPROM");
2545 } else {
2546 /* eeprom values are invalid, generate random MAC */
2547 eth_hw_addr_random(dev);
2548 smsc911x_set_hw_mac_address(pdata, dev->dev_addr);
2549 SMSC_TRACE(pdata, probe,
2550 "MAC Address is set to eth_random_addr");
2551 }
2552 }
2553
2554 spin_unlock_irq(&pdata->mac_lock);
2555 pm_runtime_put(&pdev->dev);
2556
2557 netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr);
2558
2559 return 0;
2560
2561 out_init_fail:
2562 pm_runtime_put(&pdev->dev);
2563 pm_runtime_disable(&pdev->dev);
2564 out_disable_resources:
2565 (void)smsc911x_disable_resources(pdev);
2566 out_enable_resources_fail:
2567 smsc911x_free_resources(pdev);
2568 out_request_resources_fail:
2569 iounmap(pdata->ioaddr);
2570 out_ioremap_fail:
2571 free_netdev(dev);
2572 out_release_io_1:
2573 release_mem_region(res->start, resource_size(res));
2574 out_0:
2575 return retval;
2576 }
2577
2578 #ifdef CONFIG_PM
2579 /* This implementation assumes the devices remains powered on its VDDVARIO
2580 * pins during suspend. */
2581
2582 /* TODO: implement freeze/thaw callbacks for hibernation.*/
2583
smsc911x_suspend(struct device * dev)2584 static int smsc911x_suspend(struct device *dev)
2585 {
2586 struct net_device *ndev = dev_get_drvdata(dev);
2587 struct smsc911x_data *pdata = netdev_priv(ndev);
2588
2589 if (netif_running(ndev)) {
2590 netif_stop_queue(ndev);
2591 netif_device_detach(ndev);
2592 if (!device_may_wakeup(dev))
2593 phy_stop(ndev->phydev);
2594 }
2595
2596 /* enable wake on LAN, energy detection and the external PME
2597 * signal. */
2598 smsc911x_reg_write(pdata, PMT_CTRL,
2599 PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ |
2600 PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_);
2601
2602 pm_runtime_disable(dev);
2603 pm_runtime_set_suspended(dev);
2604
2605 return 0;
2606 }
2607
smsc911x_resume(struct device * dev)2608 static int smsc911x_resume(struct device *dev)
2609 {
2610 struct net_device *ndev = dev_get_drvdata(dev);
2611 struct smsc911x_data *pdata = netdev_priv(ndev);
2612 unsigned int to = 100;
2613
2614 pm_runtime_enable(dev);
2615 pm_runtime_resume(dev);
2616
2617 /* Note 3.11 from the datasheet:
2618 * "When the LAN9220 is in a power saving state, a write of any
2619 * data to the BYTE_TEST register will wake-up the device."
2620 */
2621 smsc911x_reg_write(pdata, BYTE_TEST, 0);
2622
2623 /* poll the READY bit in PMT_CTRL. Any other access to the device is
2624 * forbidden while this bit isn't set. Try for 100ms and return -EIO
2625 * if it failed. */
2626 while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to)
2627 udelay(1000);
2628
2629 if (to == 0)
2630 return -EIO;
2631
2632 if (netif_running(ndev)) {
2633 netif_device_attach(ndev);
2634 netif_start_queue(ndev);
2635 if (!device_may_wakeup(dev))
2636 phy_start(ndev->phydev);
2637 }
2638
2639 return 0;
2640 }
2641
2642 static const struct dev_pm_ops smsc911x_pm_ops = {
2643 .suspend = smsc911x_suspend,
2644 .resume = smsc911x_resume,
2645 };
2646
2647 #define SMSC911X_PM_OPS (&smsc911x_pm_ops)
2648
2649 #else
2650 #define SMSC911X_PM_OPS NULL
2651 #endif
2652
2653 #ifdef CONFIG_OF
2654 static const struct of_device_id smsc911x_dt_ids[] = {
2655 { .compatible = "smsc,lan9115", },
2656 { /* sentinel */ }
2657 };
2658 MODULE_DEVICE_TABLE(of, smsc911x_dt_ids);
2659 #endif
2660
2661 #ifdef CONFIG_ACPI
2662 static const struct acpi_device_id smsc911x_acpi_match[] = {
2663 { "ARMH9118", 0 },
2664 { }
2665 };
2666 MODULE_DEVICE_TABLE(acpi, smsc911x_acpi_match);
2667 #endif
2668
2669 static struct platform_driver smsc911x_driver = {
2670 .probe = smsc911x_drv_probe,
2671 .remove = smsc911x_drv_remove,
2672 .driver = {
2673 .name = SMSC_CHIPNAME,
2674 .pm = SMSC911X_PM_OPS,
2675 .of_match_table = of_match_ptr(smsc911x_dt_ids),
2676 .acpi_match_table = ACPI_PTR(smsc911x_acpi_match),
2677 },
2678 };
2679
2680 /* Entry point for loading the module */
smsc911x_init_module(void)2681 static int __init smsc911x_init_module(void)
2682 {
2683 SMSC_INITIALIZE();
2684 return platform_driver_register(&smsc911x_driver);
2685 }
2686
2687 /* entry point for unloading the module */
smsc911x_cleanup_module(void)2688 static void __exit smsc911x_cleanup_module(void)
2689 {
2690 platform_driver_unregister(&smsc911x_driver);
2691 }
2692
2693 module_init(smsc911x_init_module);
2694 module_exit(smsc911x_cleanup_module);
2695