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1 | /*************************************************************************** | |
2 | * | |
3 | * Copyright (C) 2004-2008 SMSC | |
4 | * Copyright (C) 2005-2008 ARM | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | * | |
20 | *************************************************************************** | |
21 | * Rewritten, heavily based on smsc911x simple driver by SMSC. | |
22 | * Partly uses io macros from smc91x.c by Nicolas Pitre | |
23 | * | |
24 | * Supported devices: | |
25 | * LAN9115, LAN9116, LAN9117, LAN9118 | |
26 | * LAN9215, LAN9216, LAN9217, LAN9218 | |
27 | * LAN9210, LAN9211 | |
28 | * LAN9220, LAN9221 | |
29 | * LAN89218 | |
30 | * | |
31 | */ | |
32 | ||
33 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
34 | ||
35 | #include <linux/crc32.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/sched.h> | |
48 | #include <linux/timer.h> | |
49 | #include <linux/bug.h> | |
50 | #include <linux/bitops.h> | |
51 | #include <linux/irq.h> | |
52 | #include <linux/io.h> | |
53 | #include <linux/swab.h> | |
54 | #include <linux/phy.h> | |
55 | #include <linux/smsc911x.h> | |
56 | #include <linux/device.h> | |
57 | #include <linux/of.h> | |
58 | #include <linux/of_device.h> | |
59 | #include <linux/of_gpio.h> | |
60 | #include <linux/of_net.h> | |
61 | #include "smsc911x.h" | |
62 | ||
63 | #define SMSC_CHIPNAME "smsc911x" | |
64 | #define SMSC_MDIONAME "smsc911x-mdio" | |
65 | #define SMSC_DRV_VERSION "2008-10-21" | |
66 | ||
67 | MODULE_LICENSE("GPL"); | |
68 | MODULE_VERSION(SMSC_DRV_VERSION); | |
69 | MODULE_ALIAS("platform:smsc911x"); | |
70 | ||
71 | #if USE_DEBUG > 0 | |
72 | static int debug = 16; | |
73 | #else | |
74 | static int debug = 3; | |
75 | #endif | |
76 | ||
77 | module_param(debug, int, 0); | |
78 | MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); | |
79 | ||
80 | struct smsc911x_data; | |
81 | ||
82 | struct smsc911x_ops { | |
83 | u32 (*reg_read)(struct smsc911x_data *pdata, u32 reg); | |
84 | void (*reg_write)(struct smsc911x_data *pdata, u32 reg, u32 val); | |
85 | void (*rx_readfifo)(struct smsc911x_data *pdata, | |
86 | unsigned int *buf, unsigned int wordcount); | |
87 | void (*tx_writefifo)(struct smsc911x_data *pdata, | |
88 | unsigned int *buf, unsigned int wordcount); | |
89 | }; | |
90 | ||
91 | struct smsc911x_data { | |
92 | void __iomem *ioaddr; | |
93 | ||
94 | unsigned int idrev; | |
95 | ||
96 | /* used to decide which workarounds apply */ | |
97 | unsigned int generation; | |
98 | ||
99 | /* device configuration (copied from platform_data during probe) */ | |
100 | struct smsc911x_platform_config config; | |
101 | ||
102 | /* This needs to be acquired before calling any of below: | |
103 | * smsc911x_mac_read(), smsc911x_mac_write() | |
104 | */ | |
105 | spinlock_t mac_lock; | |
106 | ||
107 | /* spinlock to ensure register accesses are serialised */ | |
108 | spinlock_t dev_lock; | |
109 | ||
110 | struct phy_device *phy_dev; | |
111 | struct mii_bus *mii_bus; | |
112 | int phy_irq[PHY_MAX_ADDR]; | |
113 | unsigned int using_extphy; | |
114 | int last_duplex; | |
115 | int last_carrier; | |
116 | ||
117 | u32 msg_enable; | |
118 | unsigned int gpio_setting; | |
119 | unsigned int gpio_orig_setting; | |
120 | struct net_device *dev; | |
121 | struct napi_struct napi; | |
122 | ||
123 | unsigned int software_irq_signal; | |
124 | ||
125 | #ifdef USE_PHY_WORK_AROUND | |
126 | #define MIN_PACKET_SIZE (64) | |
127 | char loopback_tx_pkt[MIN_PACKET_SIZE]; | |
128 | char loopback_rx_pkt[MIN_PACKET_SIZE]; | |
129 | unsigned int resetcount; | |
130 | #endif | |
131 | ||
132 | /* Members for Multicast filter workaround */ | |
133 | unsigned int multicast_update_pending; | |
134 | unsigned int set_bits_mask; | |
135 | unsigned int clear_bits_mask; | |
136 | unsigned int hashhi; | |
137 | unsigned int hashlo; | |
138 | ||
139 | /* register access functions */ | |
140 | const struct smsc911x_ops *ops; | |
141 | }; | |
142 | ||
143 | /* Easy access to information */ | |
144 | #define __smsc_shift(pdata, reg) ((reg) << ((pdata)->config.shift)) | |
145 | ||
146 | static inline u32 __smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) | |
147 | { | |
148 | if (pdata->config.flags & SMSC911X_USE_32BIT) | |
149 | return readl(pdata->ioaddr + reg); | |
150 | ||
151 | if (pdata->config.flags & SMSC911X_USE_16BIT) | |
152 | return ((readw(pdata->ioaddr + reg) & 0xFFFF) | | |
153 | ((readw(pdata->ioaddr + reg + 2) & 0xFFFF) << 16)); | |
154 | ||
155 | BUG(); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static inline u32 | |
160 | __smsc911x_reg_read_shift(struct smsc911x_data *pdata, u32 reg) | |
161 | { | |
162 | if (pdata->config.flags & SMSC911X_USE_32BIT) | |
163 | return readl(pdata->ioaddr + __smsc_shift(pdata, reg)); | |
164 | ||
165 | if (pdata->config.flags & SMSC911X_USE_16BIT) | |
166 | return (readw(pdata->ioaddr + | |
167 | __smsc_shift(pdata, reg)) & 0xFFFF) | | |
168 | ((readw(pdata->ioaddr + | |
169 | __smsc_shift(pdata, reg + 2)) & 0xFFFF) << 16); | |
170 | ||
171 | BUG(); | |
172 | return 0; | |
173 | } | |
174 | ||
175 | static inline u32 smsc911x_reg_read(struct smsc911x_data *pdata, u32 reg) | |
176 | { | |
177 | u32 data; | |
178 | unsigned long flags; | |
179 | ||
180 | spin_lock_irqsave(&pdata->dev_lock, flags); | |
181 | data = pdata->ops->reg_read(pdata, reg); | |
182 | spin_unlock_irqrestore(&pdata->dev_lock, flags); | |
183 | ||
184 | return data; | |
185 | } | |
186 | ||
187 | static inline void __smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, | |
188 | u32 val) | |
189 | { | |
190 | if (pdata->config.flags & SMSC911X_USE_32BIT) { | |
191 | writel(val, pdata->ioaddr + reg); | |
192 | return; | |
193 | } | |
194 | ||
195 | if (pdata->config.flags & SMSC911X_USE_16BIT) { | |
196 | writew(val & 0xFFFF, pdata->ioaddr + reg); | |
197 | writew((val >> 16) & 0xFFFF, pdata->ioaddr + reg + 2); | |
198 | return; | |
199 | } | |
200 | ||
201 | BUG(); | |
202 | } | |
203 | ||
204 | static inline void | |
205 | __smsc911x_reg_write_shift(struct smsc911x_data *pdata, u32 reg, u32 val) | |
206 | { | |
207 | if (pdata->config.flags & SMSC911X_USE_32BIT) { | |
208 | writel(val, pdata->ioaddr + __smsc_shift(pdata, reg)); | |
209 | return; | |
210 | } | |
211 | ||
212 | if (pdata->config.flags & SMSC911X_USE_16BIT) { | |
213 | writew(val & 0xFFFF, | |
214 | pdata->ioaddr + __smsc_shift(pdata, reg)); | |
215 | writew((val >> 16) & 0xFFFF, | |
216 | pdata->ioaddr + __smsc_shift(pdata, reg + 2)); | |
217 | return; | |
218 | } | |
219 | ||
220 | BUG(); | |
221 | } | |
222 | ||
223 | static inline void smsc911x_reg_write(struct smsc911x_data *pdata, u32 reg, | |
224 | u32 val) | |
225 | { | |
226 | unsigned long flags; | |
227 | ||
228 | spin_lock_irqsave(&pdata->dev_lock, flags); | |
229 | pdata->ops->reg_write(pdata, reg, val); | |
230 | spin_unlock_irqrestore(&pdata->dev_lock, flags); | |
231 | } | |
232 | ||
233 | /* Writes a packet to the TX_DATA_FIFO */ | |
234 | static inline void | |
235 | smsc911x_tx_writefifo(struct smsc911x_data *pdata, unsigned int *buf, | |
236 | unsigned int wordcount) | |
237 | { | |
238 | unsigned long flags; | |
239 | ||
240 | spin_lock_irqsave(&pdata->dev_lock, flags); | |
241 | ||
242 | if (pdata->config.flags & SMSC911X_SWAP_FIFO) { | |
243 | while (wordcount--) | |
244 | __smsc911x_reg_write(pdata, TX_DATA_FIFO, | |
245 | swab32(*buf++)); | |
246 | goto out; | |
247 | } | |
248 | ||
249 | if (pdata->config.flags & SMSC911X_USE_32BIT) { | |
250 | writesl(pdata->ioaddr + TX_DATA_FIFO, buf, wordcount); | |
251 | goto out; | |
252 | } | |
253 | ||
254 | if (pdata->config.flags & SMSC911X_USE_16BIT) { | |
255 | while (wordcount--) | |
256 | __smsc911x_reg_write(pdata, TX_DATA_FIFO, *buf++); | |
257 | goto out; | |
258 | } | |
259 | ||
260 | BUG(); | |
261 | out: | |
262 | spin_unlock_irqrestore(&pdata->dev_lock, flags); | |
263 | } | |
264 | ||
265 | /* Writes a packet to the TX_DATA_FIFO - shifted version */ | |
266 | static inline void | |
267 | smsc911x_tx_writefifo_shift(struct smsc911x_data *pdata, unsigned int *buf, | |
268 | unsigned int wordcount) | |
269 | { | |
270 | unsigned long flags; | |
271 | ||
272 | spin_lock_irqsave(&pdata->dev_lock, flags); | |
273 | ||
274 | if (pdata->config.flags & SMSC911X_SWAP_FIFO) { | |
275 | while (wordcount--) | |
276 | __smsc911x_reg_write_shift(pdata, TX_DATA_FIFO, | |
277 | swab32(*buf++)); | |
278 | goto out; | |
279 | } | |
280 | ||
281 | if (pdata->config.flags & SMSC911X_USE_32BIT) { | |
282 | writesl(pdata->ioaddr + __smsc_shift(pdata, | |
283 | TX_DATA_FIFO), buf, wordcount); | |
284 | goto out; | |
285 | } | |
286 | ||
287 | if (pdata->config.flags & SMSC911X_USE_16BIT) { | |
288 | while (wordcount--) | |
289 | __smsc911x_reg_write_shift(pdata, | |
290 | TX_DATA_FIFO, *buf++); | |
291 | goto out; | |
292 | } | |
293 | ||
294 | BUG(); | |
295 | out: | |
296 | spin_unlock_irqrestore(&pdata->dev_lock, flags); | |
297 | } | |
298 | ||
299 | /* Reads a packet out of the RX_DATA_FIFO */ | |
300 | static inline void | |
301 | smsc911x_rx_readfifo(struct smsc911x_data *pdata, unsigned int *buf, | |
302 | unsigned int wordcount) | |
303 | { | |
304 | unsigned long flags; | |
305 | ||
306 | spin_lock_irqsave(&pdata->dev_lock, flags); | |
307 | ||
308 | if (pdata->config.flags & SMSC911X_SWAP_FIFO) { | |
309 | while (wordcount--) | |
310 | *buf++ = swab32(__smsc911x_reg_read(pdata, | |
311 | RX_DATA_FIFO)); | |
312 | goto out; | |
313 | } | |
314 | ||
315 | if (pdata->config.flags & SMSC911X_USE_32BIT) { | |
316 | readsl(pdata->ioaddr + RX_DATA_FIFO, buf, wordcount); | |
317 | goto out; | |
318 | } | |
319 | ||
320 | if (pdata->config.flags & SMSC911X_USE_16BIT) { | |
321 | while (wordcount--) | |
322 | *buf++ = __smsc911x_reg_read(pdata, RX_DATA_FIFO); | |
323 | goto out; | |
324 | } | |
325 | ||
326 | BUG(); | |
327 | out: | |
328 | spin_unlock_irqrestore(&pdata->dev_lock, flags); | |
329 | } | |
330 | ||
331 | /* Reads a packet out of the RX_DATA_FIFO - shifted version */ | |
332 | static inline void | |
333 | smsc911x_rx_readfifo_shift(struct smsc911x_data *pdata, unsigned int *buf, | |
334 | unsigned int wordcount) | |
335 | { | |
336 | unsigned long flags; | |
337 | ||
338 | spin_lock_irqsave(&pdata->dev_lock, flags); | |
339 | ||
340 | if (pdata->config.flags & SMSC911X_SWAP_FIFO) { | |
341 | while (wordcount--) | |
342 | *buf++ = swab32(__smsc911x_reg_read_shift(pdata, | |
343 | RX_DATA_FIFO)); | |
344 | goto out; | |
345 | } | |
346 | ||
347 | if (pdata->config.flags & SMSC911X_USE_32BIT) { | |
348 | readsl(pdata->ioaddr + __smsc_shift(pdata, | |
349 | RX_DATA_FIFO), buf, wordcount); | |
350 | goto out; | |
351 | } | |
352 | ||
353 | if (pdata->config.flags & SMSC911X_USE_16BIT) { | |
354 | while (wordcount--) | |
355 | *buf++ = __smsc911x_reg_read_shift(pdata, | |
356 | RX_DATA_FIFO); | |
357 | goto out; | |
358 | } | |
359 | ||
360 | BUG(); | |
361 | out: | |
362 | spin_unlock_irqrestore(&pdata->dev_lock, flags); | |
363 | } | |
364 | ||
365 | /* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read | |
366 | * and smsc911x_mac_write, so assumes mac_lock is held */ | |
367 | static int smsc911x_mac_complete(struct smsc911x_data *pdata) | |
368 | { | |
369 | int i; | |
370 | u32 val; | |
371 | ||
372 | SMSC_ASSERT_MAC_LOCK(pdata); | |
373 | ||
374 | for (i = 0; i < 40; i++) { | |
375 | val = smsc911x_reg_read(pdata, MAC_CSR_CMD); | |
376 | if (!(val & MAC_CSR_CMD_CSR_BUSY_)) | |
377 | return 0; | |
378 | } | |
379 | SMSC_WARN(pdata, hw, "Timed out waiting for MAC not BUSY. " | |
380 | "MAC_CSR_CMD: 0x%08X", val); | |
381 | return -EIO; | |
382 | } | |
383 | ||
384 | /* Fetches a MAC register value. Assumes mac_lock is acquired */ | |
385 | static u32 smsc911x_mac_read(struct smsc911x_data *pdata, unsigned int offset) | |
386 | { | |
387 | unsigned int temp; | |
388 | ||
389 | SMSC_ASSERT_MAC_LOCK(pdata); | |
390 | ||
391 | temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); | |
392 | if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { | |
393 | SMSC_WARN(pdata, hw, "MAC busy at entry"); | |
394 | return 0xFFFFFFFF; | |
395 | } | |
396 | ||
397 | /* Send the MAC cmd */ | |
398 | smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | | |
399 | MAC_CSR_CMD_CSR_BUSY_ | MAC_CSR_CMD_R_NOT_W_)); | |
400 | ||
401 | /* Workaround for hardware read-after-write restriction */ | |
402 | temp = smsc911x_reg_read(pdata, BYTE_TEST); | |
403 | ||
404 | /* Wait for the read to complete */ | |
405 | if (likely(smsc911x_mac_complete(pdata) == 0)) | |
406 | return smsc911x_reg_read(pdata, MAC_CSR_DATA); | |
407 | ||
408 | SMSC_WARN(pdata, hw, "MAC busy after read"); | |
409 | return 0xFFFFFFFF; | |
410 | } | |
411 | ||
412 | /* Set a mac register, mac_lock must be acquired before calling */ | |
413 | static void smsc911x_mac_write(struct smsc911x_data *pdata, | |
414 | unsigned int offset, u32 val) | |
415 | { | |
416 | unsigned int temp; | |
417 | ||
418 | SMSC_ASSERT_MAC_LOCK(pdata); | |
419 | ||
420 | temp = smsc911x_reg_read(pdata, MAC_CSR_CMD); | |
421 | if (unlikely(temp & MAC_CSR_CMD_CSR_BUSY_)) { | |
422 | SMSC_WARN(pdata, hw, | |
423 | "smsc911x_mac_write failed, MAC busy at entry"); | |
424 | return; | |
425 | } | |
426 | ||
427 | /* Send data to write */ | |
428 | smsc911x_reg_write(pdata, MAC_CSR_DATA, val); | |
429 | ||
430 | /* Write the actual data */ | |
431 | smsc911x_reg_write(pdata, MAC_CSR_CMD, ((offset & 0xFF) | | |
432 | MAC_CSR_CMD_CSR_BUSY_)); | |
433 | ||
434 | /* Workaround for hardware read-after-write restriction */ | |
435 | temp = smsc911x_reg_read(pdata, BYTE_TEST); | |
436 | ||
437 | /* Wait for the write to complete */ | |
438 | if (likely(smsc911x_mac_complete(pdata) == 0)) | |
439 | return; | |
440 | ||
441 | SMSC_WARN(pdata, hw, "smsc911x_mac_write failed, MAC busy after write"); | |
442 | } | |
443 | ||
444 | /* Get a phy register */ | |
445 | static int smsc911x_mii_read(struct mii_bus *bus, int phyaddr, int regidx) | |
446 | { | |
447 | struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; | |
448 | unsigned long flags; | |
449 | unsigned int addr; | |
450 | int i, reg; | |
451 | ||
452 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
453 | ||
454 | /* Confirm MII not busy */ | |
455 | if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { | |
456 | SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_read???"); | |
457 | reg = -EIO; | |
458 | goto out; | |
459 | } | |
460 | ||
461 | /* Set the address, index & direction (read from PHY) */ | |
462 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6); | |
463 | smsc911x_mac_write(pdata, MII_ACC, addr); | |
464 | ||
465 | /* Wait for read to complete w/ timeout */ | |
466 | for (i = 0; i < 100; i++) | |
467 | if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { | |
468 | reg = smsc911x_mac_read(pdata, MII_DATA); | |
469 | goto out; | |
470 | } | |
471 | ||
472 | SMSC_WARN(pdata, hw, "Timed out waiting for MII read to finish"); | |
473 | reg = -EIO; | |
474 | ||
475 | out: | |
476 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
477 | return reg; | |
478 | } | |
479 | ||
480 | /* Set a phy register */ | |
481 | static int smsc911x_mii_write(struct mii_bus *bus, int phyaddr, int regidx, | |
482 | u16 val) | |
483 | { | |
484 | struct smsc911x_data *pdata = (struct smsc911x_data *)bus->priv; | |
485 | unsigned long flags; | |
486 | unsigned int addr; | |
487 | int i, reg; | |
488 | ||
489 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
490 | ||
491 | /* Confirm MII not busy */ | |
492 | if (unlikely(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { | |
493 | SMSC_WARN(pdata, hw, "MII is busy in smsc911x_mii_write???"); | |
494 | reg = -EIO; | |
495 | goto out; | |
496 | } | |
497 | ||
498 | /* Put the data to write in the MAC */ | |
499 | smsc911x_mac_write(pdata, MII_DATA, val); | |
500 | ||
501 | /* Set the address, index & direction (write to PHY) */ | |
502 | addr = ((phyaddr & 0x1F) << 11) | ((regidx & 0x1F) << 6) | | |
503 | MII_ACC_MII_WRITE_; | |
504 | smsc911x_mac_write(pdata, MII_ACC, addr); | |
505 | ||
506 | /* Wait for write to complete w/ timeout */ | |
507 | for (i = 0; i < 100; i++) | |
508 | if (!(smsc911x_mac_read(pdata, MII_ACC) & MII_ACC_MII_BUSY_)) { | |
509 | reg = 0; | |
510 | goto out; | |
511 | } | |
512 | ||
513 | SMSC_WARN(pdata, hw, "Timed out waiting for MII write to finish"); | |
514 | reg = -EIO; | |
515 | ||
516 | out: | |
517 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
518 | return reg; | |
519 | } | |
520 | ||
521 | /* Switch to external phy. Assumes tx and rx are stopped. */ | |
522 | static void smsc911x_phy_enable_external(struct smsc911x_data *pdata) | |
523 | { | |
524 | unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); | |
525 | ||
526 | /* Disable phy clocks to the MAC */ | |
527 | hwcfg &= (~HW_CFG_PHY_CLK_SEL_); | |
528 | hwcfg |= HW_CFG_PHY_CLK_SEL_CLK_DIS_; | |
529 | smsc911x_reg_write(pdata, HW_CFG, hwcfg); | |
530 | udelay(10); /* Enough time for clocks to stop */ | |
531 | ||
532 | /* Switch to external phy */ | |
533 | hwcfg |= HW_CFG_EXT_PHY_EN_; | |
534 | smsc911x_reg_write(pdata, HW_CFG, hwcfg); | |
535 | ||
536 | /* Enable phy clocks to the MAC */ | |
537 | hwcfg &= (~HW_CFG_PHY_CLK_SEL_); | |
538 | hwcfg |= HW_CFG_PHY_CLK_SEL_EXT_PHY_; | |
539 | smsc911x_reg_write(pdata, HW_CFG, hwcfg); | |
540 | udelay(10); /* Enough time for clocks to restart */ | |
541 | ||
542 | hwcfg |= HW_CFG_SMI_SEL_; | |
543 | smsc911x_reg_write(pdata, HW_CFG, hwcfg); | |
544 | } | |
545 | ||
546 | /* Autodetects and enables external phy if present on supported chips. | |
547 | * autodetection can be overridden by specifying SMSC911X_FORCE_INTERNAL_PHY | |
548 | * or SMSC911X_FORCE_EXTERNAL_PHY in the platform_data flags. */ | |
549 | static void smsc911x_phy_initialise_external(struct smsc911x_data *pdata) | |
550 | { | |
551 | unsigned int hwcfg = smsc911x_reg_read(pdata, HW_CFG); | |
552 | ||
553 | if (pdata->config.flags & SMSC911X_FORCE_INTERNAL_PHY) { | |
554 | SMSC_TRACE(pdata, hw, "Forcing internal PHY"); | |
555 | pdata->using_extphy = 0; | |
556 | } else if (pdata->config.flags & SMSC911X_FORCE_EXTERNAL_PHY) { | |
557 | SMSC_TRACE(pdata, hw, "Forcing external PHY"); | |
558 | smsc911x_phy_enable_external(pdata); | |
559 | pdata->using_extphy = 1; | |
560 | } else if (hwcfg & HW_CFG_EXT_PHY_DET_) { | |
561 | SMSC_TRACE(pdata, hw, | |
562 | "HW_CFG EXT_PHY_DET set, using external PHY"); | |
563 | smsc911x_phy_enable_external(pdata); | |
564 | pdata->using_extphy = 1; | |
565 | } else { | |
566 | SMSC_TRACE(pdata, hw, | |
567 | "HW_CFG EXT_PHY_DET clear, using internal PHY"); | |
568 | pdata->using_extphy = 0; | |
569 | } | |
570 | } | |
571 | ||
572 | /* Fetches a tx status out of the status fifo */ | |
573 | static unsigned int smsc911x_tx_get_txstatus(struct smsc911x_data *pdata) | |
574 | { | |
575 | unsigned int result = | |
576 | smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TSUSED_; | |
577 | ||
578 | if (result != 0) | |
579 | result = smsc911x_reg_read(pdata, TX_STATUS_FIFO); | |
580 | ||
581 | return result; | |
582 | } | |
583 | ||
584 | /* Fetches the next rx status */ | |
585 | static unsigned int smsc911x_rx_get_rxstatus(struct smsc911x_data *pdata) | |
586 | { | |
587 | unsigned int result = | |
588 | smsc911x_reg_read(pdata, RX_FIFO_INF) & RX_FIFO_INF_RXSUSED_; | |
589 | ||
590 | if (result != 0) | |
591 | result = smsc911x_reg_read(pdata, RX_STATUS_FIFO); | |
592 | ||
593 | return result; | |
594 | } | |
595 | ||
596 | #ifdef USE_PHY_WORK_AROUND | |
597 | static int smsc911x_phy_check_loopbackpkt(struct smsc911x_data *pdata) | |
598 | { | |
599 | unsigned int tries; | |
600 | u32 wrsz; | |
601 | u32 rdsz; | |
602 | ulong bufp; | |
603 | ||
604 | for (tries = 0; tries < 10; tries++) { | |
605 | unsigned int txcmd_a; | |
606 | unsigned int txcmd_b; | |
607 | unsigned int status; | |
608 | unsigned int pktlength; | |
609 | unsigned int i; | |
610 | ||
611 | /* Zero-out rx packet memory */ | |
612 | memset(pdata->loopback_rx_pkt, 0, MIN_PACKET_SIZE); | |
613 | ||
614 | /* Write tx packet to 118 */ | |
615 | txcmd_a = (u32)((ulong)pdata->loopback_tx_pkt & 0x03) << 16; | |
616 | txcmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; | |
617 | txcmd_a |= MIN_PACKET_SIZE; | |
618 | ||
619 | txcmd_b = MIN_PACKET_SIZE << 16 | MIN_PACKET_SIZE; | |
620 | ||
621 | smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_a); | |
622 | smsc911x_reg_write(pdata, TX_DATA_FIFO, txcmd_b); | |
623 | ||
624 | bufp = (ulong)pdata->loopback_tx_pkt & (~0x3); | |
625 | wrsz = MIN_PACKET_SIZE + 3; | |
626 | wrsz += (u32)((ulong)pdata->loopback_tx_pkt & 0x3); | |
627 | wrsz >>= 2; | |
628 | ||
629 | pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); | |
630 | ||
631 | /* Wait till transmit is done */ | |
632 | i = 60; | |
633 | do { | |
634 | udelay(5); | |
635 | status = smsc911x_tx_get_txstatus(pdata); | |
636 | } while ((i--) && (!status)); | |
637 | ||
638 | if (!status) { | |
639 | SMSC_WARN(pdata, hw, | |
640 | "Failed to transmit during loopback test"); | |
641 | continue; | |
642 | } | |
643 | if (status & TX_STS_ES_) { | |
644 | SMSC_WARN(pdata, hw, | |
645 | "Transmit encountered errors during loopback test"); | |
646 | continue; | |
647 | } | |
648 | ||
649 | /* Wait till receive is done */ | |
650 | i = 60; | |
651 | do { | |
652 | udelay(5); | |
653 | status = smsc911x_rx_get_rxstatus(pdata); | |
654 | } while ((i--) && (!status)); | |
655 | ||
656 | if (!status) { | |
657 | SMSC_WARN(pdata, hw, | |
658 | "Failed to receive during loopback test"); | |
659 | continue; | |
660 | } | |
661 | if (status & RX_STS_ES_) { | |
662 | SMSC_WARN(pdata, hw, | |
663 | "Receive encountered errors during loopback test"); | |
664 | continue; | |
665 | } | |
666 | ||
667 | pktlength = ((status & 0x3FFF0000UL) >> 16); | |
668 | bufp = (ulong)pdata->loopback_rx_pkt; | |
669 | rdsz = pktlength + 3; | |
670 | rdsz += (u32)((ulong)pdata->loopback_rx_pkt & 0x3); | |
671 | rdsz >>= 2; | |
672 | ||
673 | pdata->ops->rx_readfifo(pdata, (unsigned int *)bufp, rdsz); | |
674 | ||
675 | if (pktlength != (MIN_PACKET_SIZE + 4)) { | |
676 | SMSC_WARN(pdata, hw, "Unexpected packet size " | |
677 | "during loop back test, size=%d, will retry", | |
678 | pktlength); | |
679 | } else { | |
680 | unsigned int j; | |
681 | int mismatch = 0; | |
682 | for (j = 0; j < MIN_PACKET_SIZE; j++) { | |
683 | if (pdata->loopback_tx_pkt[j] | |
684 | != pdata->loopback_rx_pkt[j]) { | |
685 | mismatch = 1; | |
686 | break; | |
687 | } | |
688 | } | |
689 | if (!mismatch) { | |
690 | SMSC_TRACE(pdata, hw, "Successfully verified " | |
691 | "loopback packet"); | |
692 | return 0; | |
693 | } else { | |
694 | SMSC_WARN(pdata, hw, "Data mismatch " | |
695 | "during loop back test, will retry"); | |
696 | } | |
697 | } | |
698 | } | |
699 | ||
700 | return -EIO; | |
701 | } | |
702 | ||
703 | static int smsc911x_phy_reset(struct smsc911x_data *pdata) | |
704 | { | |
705 | struct phy_device *phy_dev = pdata->phy_dev; | |
706 | unsigned int temp; | |
707 | unsigned int i = 100000; | |
708 | ||
709 | BUG_ON(!phy_dev); | |
710 | BUG_ON(!phy_dev->bus); | |
711 | ||
712 | SMSC_TRACE(pdata, hw, "Performing PHY BCR Reset"); | |
713 | smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, BMCR_RESET); | |
714 | do { | |
715 | msleep(1); | |
716 | temp = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, | |
717 | MII_BMCR); | |
718 | } while ((i--) && (temp & BMCR_RESET)); | |
719 | ||
720 | if (temp & BMCR_RESET) { | |
721 | SMSC_WARN(pdata, hw, "PHY reset failed to complete"); | |
722 | return -EIO; | |
723 | } | |
724 | /* Extra delay required because the phy may not be completed with | |
725 | * its reset when BMCR_RESET is cleared. Specs say 256 uS is | |
726 | * enough delay but using 1ms here to be safe */ | |
727 | msleep(1); | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | static int smsc911x_phy_loopbacktest(struct net_device *dev) | |
733 | { | |
734 | struct smsc911x_data *pdata = netdev_priv(dev); | |
735 | struct phy_device *phy_dev = pdata->phy_dev; | |
736 | int result = -EIO; | |
737 | unsigned int i, val; | |
738 | unsigned long flags; | |
739 | ||
740 | /* Initialise tx packet using broadcast destination address */ | |
741 | memset(pdata->loopback_tx_pkt, 0xff, ETH_ALEN); | |
742 | ||
743 | /* Use incrementing source address */ | |
744 | for (i = 6; i < 12; i++) | |
745 | pdata->loopback_tx_pkt[i] = (char)i; | |
746 | ||
747 | /* Set length type field */ | |
748 | pdata->loopback_tx_pkt[12] = 0x00; | |
749 | pdata->loopback_tx_pkt[13] = 0x00; | |
750 | ||
751 | for (i = 14; i < MIN_PACKET_SIZE; i++) | |
752 | pdata->loopback_tx_pkt[i] = (char)i; | |
753 | ||
754 | val = smsc911x_reg_read(pdata, HW_CFG); | |
755 | val &= HW_CFG_TX_FIF_SZ_; | |
756 | val |= HW_CFG_SF_; | |
757 | smsc911x_reg_write(pdata, HW_CFG, val); | |
758 | ||
759 | smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); | |
760 | smsc911x_reg_write(pdata, RX_CFG, | |
761 | (u32)((ulong)pdata->loopback_rx_pkt & 0x03) << 8); | |
762 | ||
763 | for (i = 0; i < 10; i++) { | |
764 | /* Set PHY to 10/FD, no ANEG, and loopback mode */ | |
765 | smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, | |
766 | BMCR_LOOPBACK | BMCR_FULLDPLX); | |
767 | ||
768 | /* Enable MAC tx/rx, FD */ | |
769 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
770 | smsc911x_mac_write(pdata, MAC_CR, MAC_CR_FDPX_ | |
771 | | MAC_CR_TXEN_ | MAC_CR_RXEN_); | |
772 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
773 | ||
774 | if (smsc911x_phy_check_loopbackpkt(pdata) == 0) { | |
775 | result = 0; | |
776 | break; | |
777 | } | |
778 | pdata->resetcount++; | |
779 | ||
780 | /* Disable MAC rx */ | |
781 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
782 | smsc911x_mac_write(pdata, MAC_CR, 0); | |
783 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
784 | ||
785 | smsc911x_phy_reset(pdata); | |
786 | } | |
787 | ||
788 | /* Disable MAC */ | |
789 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
790 | smsc911x_mac_write(pdata, MAC_CR, 0); | |
791 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
792 | ||
793 | /* Cancel PHY loopback mode */ | |
794 | smsc911x_mii_write(phy_dev->bus, phy_dev->addr, MII_BMCR, 0); | |
795 | ||
796 | smsc911x_reg_write(pdata, TX_CFG, 0); | |
797 | smsc911x_reg_write(pdata, RX_CFG, 0); | |
798 | ||
799 | return result; | |
800 | } | |
801 | #endif /* USE_PHY_WORK_AROUND */ | |
802 | ||
803 | static void smsc911x_phy_update_flowcontrol(struct smsc911x_data *pdata) | |
804 | { | |
805 | struct phy_device *phy_dev = pdata->phy_dev; | |
806 | u32 afc = smsc911x_reg_read(pdata, AFC_CFG); | |
807 | u32 flow; | |
808 | unsigned long flags; | |
809 | ||
810 | if (phy_dev->duplex == DUPLEX_FULL) { | |
811 | u16 lcladv = phy_read(phy_dev, MII_ADVERTISE); | |
812 | u16 rmtadv = phy_read(phy_dev, MII_LPA); | |
813 | u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); | |
814 | ||
815 | if (cap & FLOW_CTRL_RX) | |
816 | flow = 0xFFFF0002; | |
817 | else | |
818 | flow = 0; | |
819 | ||
820 | if (cap & FLOW_CTRL_TX) | |
821 | afc |= 0xF; | |
822 | else | |
823 | afc &= ~0xF; | |
824 | ||
825 | SMSC_TRACE(pdata, hw, "rx pause %s, tx pause %s", | |
826 | (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), | |
827 | (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); | |
828 | } else { | |
829 | SMSC_TRACE(pdata, hw, "half duplex"); | |
830 | flow = 0; | |
831 | afc |= 0xF; | |
832 | } | |
833 | ||
834 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
835 | smsc911x_mac_write(pdata, FLOW, flow); | |
836 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
837 | ||
838 | smsc911x_reg_write(pdata, AFC_CFG, afc); | |
839 | } | |
840 | ||
841 | /* Update link mode if anything has changed. Called periodically when the | |
842 | * PHY is in polling mode, even if nothing has changed. */ | |
843 | static void smsc911x_phy_adjust_link(struct net_device *dev) | |
844 | { | |
845 | struct smsc911x_data *pdata = netdev_priv(dev); | |
846 | struct phy_device *phy_dev = pdata->phy_dev; | |
847 | unsigned long flags; | |
848 | int carrier; | |
849 | ||
850 | if (phy_dev->duplex != pdata->last_duplex) { | |
851 | unsigned int mac_cr; | |
852 | SMSC_TRACE(pdata, hw, "duplex state has changed"); | |
853 | ||
854 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
855 | mac_cr = smsc911x_mac_read(pdata, MAC_CR); | |
856 | if (phy_dev->duplex) { | |
857 | SMSC_TRACE(pdata, hw, | |
858 | "configuring for full duplex mode"); | |
859 | mac_cr |= MAC_CR_FDPX_; | |
860 | } else { | |
861 | SMSC_TRACE(pdata, hw, | |
862 | "configuring for half duplex mode"); | |
863 | mac_cr &= ~MAC_CR_FDPX_; | |
864 | } | |
865 | smsc911x_mac_write(pdata, MAC_CR, mac_cr); | |
866 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
867 | ||
868 | smsc911x_phy_update_flowcontrol(pdata); | |
869 | pdata->last_duplex = phy_dev->duplex; | |
870 | } | |
871 | ||
872 | carrier = netif_carrier_ok(dev); | |
873 | if (carrier != pdata->last_carrier) { | |
874 | SMSC_TRACE(pdata, hw, "carrier state has changed"); | |
875 | if (carrier) { | |
876 | SMSC_TRACE(pdata, hw, "configuring for carrier OK"); | |
877 | if ((pdata->gpio_orig_setting & GPIO_CFG_LED1_EN_) && | |
878 | (!pdata->using_extphy)) { | |
879 | /* Restore original GPIO configuration */ | |
880 | pdata->gpio_setting = pdata->gpio_orig_setting; | |
881 | smsc911x_reg_write(pdata, GPIO_CFG, | |
882 | pdata->gpio_setting); | |
883 | } | |
884 | } else { | |
885 | SMSC_TRACE(pdata, hw, "configuring for no carrier"); | |
886 | /* Check global setting that LED1 | |
887 | * usage is 10/100 indicator */ | |
888 | pdata->gpio_setting = smsc911x_reg_read(pdata, | |
889 | GPIO_CFG); | |
890 | if ((pdata->gpio_setting & GPIO_CFG_LED1_EN_) && | |
891 | (!pdata->using_extphy)) { | |
892 | /* Force 10/100 LED off, after saving | |
893 | * original GPIO configuration */ | |
894 | pdata->gpio_orig_setting = pdata->gpio_setting; | |
895 | ||
896 | pdata->gpio_setting &= ~GPIO_CFG_LED1_EN_; | |
897 | pdata->gpio_setting |= (GPIO_CFG_GPIOBUF0_ | |
898 | | GPIO_CFG_GPIODIR0_ | |
899 | | GPIO_CFG_GPIOD0_); | |
900 | smsc911x_reg_write(pdata, GPIO_CFG, | |
901 | pdata->gpio_setting); | |
902 | } | |
903 | } | |
904 | pdata->last_carrier = carrier; | |
905 | } | |
906 | } | |
907 | ||
908 | static int smsc911x_mii_probe(struct net_device *dev) | |
909 | { | |
910 | struct smsc911x_data *pdata = netdev_priv(dev); | |
911 | struct phy_device *phydev = NULL; | |
912 | int ret; | |
913 | ||
914 | /* find the first phy */ | |
915 | phydev = phy_find_first(pdata->mii_bus); | |
916 | if (!phydev) { | |
917 | netdev_err(dev, "no PHY found\n"); | |
918 | return -ENODEV; | |
919 | } | |
920 | ||
921 | SMSC_TRACE(pdata, probe, "PHY: addr %d, phy_id 0x%08X", | |
922 | phydev->addr, phydev->phy_id); | |
923 | ||
924 | ret = phy_connect_direct(dev, phydev, | |
925 | &smsc911x_phy_adjust_link, 0, | |
926 | pdata->config.phy_interface); | |
927 | ||
928 | if (ret) { | |
929 | netdev_err(dev, "Could not attach to PHY\n"); | |
930 | return ret; | |
931 | } | |
932 | ||
933 | netdev_info(dev, | |
934 | "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n", | |
935 | phydev->drv->name, dev_name(&phydev->dev), phydev->irq); | |
936 | ||
937 | /* mask with MAC supported features */ | |
938 | phydev->supported &= (PHY_BASIC_FEATURES | SUPPORTED_Pause | | |
939 | SUPPORTED_Asym_Pause); | |
940 | phydev->advertising = phydev->supported; | |
941 | ||
942 | pdata->phy_dev = phydev; | |
943 | pdata->last_duplex = -1; | |
944 | pdata->last_carrier = -1; | |
945 | ||
946 | #ifdef USE_PHY_WORK_AROUND | |
947 | if (smsc911x_phy_loopbacktest(dev) < 0) { | |
948 | SMSC_WARN(pdata, hw, "Failed Loop Back Test"); | |
949 | return -ENODEV; | |
950 | } | |
951 | SMSC_TRACE(pdata, hw, "Passed Loop Back Test"); | |
952 | #endif /* USE_PHY_WORK_AROUND */ | |
953 | ||
954 | SMSC_TRACE(pdata, hw, "phy initialised successfully"); | |
955 | return 0; | |
956 | } | |
957 | ||
958 | static int __devinit smsc911x_mii_init(struct platform_device *pdev, | |
959 | struct net_device *dev) | |
960 | { | |
961 | struct smsc911x_data *pdata = netdev_priv(dev); | |
962 | int err = -ENXIO, i; | |
963 | ||
964 | pdata->mii_bus = mdiobus_alloc(); | |
965 | if (!pdata->mii_bus) { | |
966 | err = -ENOMEM; | |
967 | goto err_out_1; | |
968 | } | |
969 | ||
970 | pdata->mii_bus->name = SMSC_MDIONAME; | |
971 | snprintf(pdata->mii_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id); | |
972 | pdata->mii_bus->priv = pdata; | |
973 | pdata->mii_bus->read = smsc911x_mii_read; | |
974 | pdata->mii_bus->write = smsc911x_mii_write; | |
975 | pdata->mii_bus->irq = pdata->phy_irq; | |
976 | for (i = 0; i < PHY_MAX_ADDR; ++i) | |
977 | pdata->mii_bus->irq[i] = PHY_POLL; | |
978 | ||
979 | pdata->mii_bus->parent = &pdev->dev; | |
980 | ||
981 | switch (pdata->idrev & 0xFFFF0000) { | |
982 | case 0x01170000: | |
983 | case 0x01150000: | |
984 | case 0x117A0000: | |
985 | case 0x115A0000: | |
986 | /* External PHY supported, try to autodetect */ | |
987 | smsc911x_phy_initialise_external(pdata); | |
988 | break; | |
989 | default: | |
990 | SMSC_TRACE(pdata, hw, "External PHY is not supported, " | |
991 | "using internal PHY"); | |
992 | pdata->using_extphy = 0; | |
993 | break; | |
994 | } | |
995 | ||
996 | if (!pdata->using_extphy) { | |
997 | /* Mask all PHYs except ID 1 (internal) */ | |
998 | pdata->mii_bus->phy_mask = ~(1 << 1); | |
999 | } | |
1000 | ||
1001 | if (mdiobus_register(pdata->mii_bus)) { | |
1002 | SMSC_WARN(pdata, probe, "Error registering mii bus"); | |
1003 | goto err_out_free_bus_2; | |
1004 | } | |
1005 | ||
1006 | if (smsc911x_mii_probe(dev) < 0) { | |
1007 | SMSC_WARN(pdata, probe, "Error registering mii bus"); | |
1008 | goto err_out_unregister_bus_3; | |
1009 | } | |
1010 | ||
1011 | return 0; | |
1012 | ||
1013 | err_out_unregister_bus_3: | |
1014 | mdiobus_unregister(pdata->mii_bus); | |
1015 | err_out_free_bus_2: | |
1016 | mdiobus_free(pdata->mii_bus); | |
1017 | err_out_1: | |
1018 | return err; | |
1019 | } | |
1020 | ||
1021 | /* Gets the number of tx statuses in the fifo */ | |
1022 | static unsigned int smsc911x_tx_get_txstatcount(struct smsc911x_data *pdata) | |
1023 | { | |
1024 | return (smsc911x_reg_read(pdata, TX_FIFO_INF) | |
1025 | & TX_FIFO_INF_TSUSED_) >> 16; | |
1026 | } | |
1027 | ||
1028 | /* Reads tx statuses and increments counters where necessary */ | |
1029 | static void smsc911x_tx_update_txcounters(struct net_device *dev) | |
1030 | { | |
1031 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1032 | unsigned int tx_stat; | |
1033 | ||
1034 | while ((tx_stat = smsc911x_tx_get_txstatus(pdata)) != 0) { | |
1035 | if (unlikely(tx_stat & 0x80000000)) { | |
1036 | /* In this driver the packet tag is used as the packet | |
1037 | * length. Since a packet length can never reach the | |
1038 | * size of 0x8000, this bit is reserved. It is worth | |
1039 | * noting that the "reserved bit" in the warning above | |
1040 | * does not reference a hardware defined reserved bit | |
1041 | * but rather a driver defined one. | |
1042 | */ | |
1043 | SMSC_WARN(pdata, hw, "Packet tag reserved bit is high"); | |
1044 | } else { | |
1045 | if (unlikely(tx_stat & TX_STS_ES_)) { | |
1046 | dev->stats.tx_errors++; | |
1047 | } else { | |
1048 | dev->stats.tx_packets++; | |
1049 | dev->stats.tx_bytes += (tx_stat >> 16); | |
1050 | } | |
1051 | if (unlikely(tx_stat & TX_STS_EXCESS_COL_)) { | |
1052 | dev->stats.collisions += 16; | |
1053 | dev->stats.tx_aborted_errors += 1; | |
1054 | } else { | |
1055 | dev->stats.collisions += | |
1056 | ((tx_stat >> 3) & 0xF); | |
1057 | } | |
1058 | if (unlikely(tx_stat & TX_STS_LOST_CARRIER_)) | |
1059 | dev->stats.tx_carrier_errors += 1; | |
1060 | if (unlikely(tx_stat & TX_STS_LATE_COL_)) { | |
1061 | dev->stats.collisions++; | |
1062 | dev->stats.tx_aborted_errors++; | |
1063 | } | |
1064 | } | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | /* Increments the Rx error counters */ | |
1069 | static void | |
1070 | smsc911x_rx_counterrors(struct net_device *dev, unsigned int rxstat) | |
1071 | { | |
1072 | int crc_err = 0; | |
1073 | ||
1074 | if (unlikely(rxstat & RX_STS_ES_)) { | |
1075 | dev->stats.rx_errors++; | |
1076 | if (unlikely(rxstat & RX_STS_CRC_ERR_)) { | |
1077 | dev->stats.rx_crc_errors++; | |
1078 | crc_err = 1; | |
1079 | } | |
1080 | } | |
1081 | if (likely(!crc_err)) { | |
1082 | if (unlikely((rxstat & RX_STS_FRAME_TYPE_) && | |
1083 | (rxstat & RX_STS_LENGTH_ERR_))) | |
1084 | dev->stats.rx_length_errors++; | |
1085 | if (rxstat & RX_STS_MCAST_) | |
1086 | dev->stats.multicast++; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | /* Quickly dumps bad packets */ | |
1091 | static void | |
1092 | smsc911x_rx_fastforward(struct smsc911x_data *pdata, unsigned int pktbytes) | |
1093 | { | |
1094 | unsigned int pktwords = (pktbytes + NET_IP_ALIGN + 3) >> 2; | |
1095 | ||
1096 | if (likely(pktwords >= 4)) { | |
1097 | unsigned int timeout = 500; | |
1098 | unsigned int val; | |
1099 | smsc911x_reg_write(pdata, RX_DP_CTRL, RX_DP_CTRL_RX_FFWD_); | |
1100 | do { | |
1101 | udelay(1); | |
1102 | val = smsc911x_reg_read(pdata, RX_DP_CTRL); | |
1103 | } while ((val & RX_DP_CTRL_RX_FFWD_) && --timeout); | |
1104 | ||
1105 | if (unlikely(timeout == 0)) | |
1106 | SMSC_WARN(pdata, hw, "Timed out waiting for " | |
1107 | "RX FFWD to finish, RX_DP_CTRL: 0x%08X", val); | |
1108 | } else { | |
1109 | unsigned int temp; | |
1110 | while (pktwords--) | |
1111 | temp = smsc911x_reg_read(pdata, RX_DATA_FIFO); | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /* NAPI poll function */ | |
1116 | static int smsc911x_poll(struct napi_struct *napi, int budget) | |
1117 | { | |
1118 | struct smsc911x_data *pdata = | |
1119 | container_of(napi, struct smsc911x_data, napi); | |
1120 | struct net_device *dev = pdata->dev; | |
1121 | int npackets = 0; | |
1122 | ||
1123 | while (npackets < budget) { | |
1124 | unsigned int pktlength; | |
1125 | unsigned int pktwords; | |
1126 | struct sk_buff *skb; | |
1127 | unsigned int rxstat = smsc911x_rx_get_rxstatus(pdata); | |
1128 | ||
1129 | if (!rxstat) { | |
1130 | unsigned int temp; | |
1131 | /* We processed all packets available. Tell NAPI it can | |
1132 | * stop polling then re-enable rx interrupts */ | |
1133 | smsc911x_reg_write(pdata, INT_STS, INT_STS_RSFL_); | |
1134 | napi_complete(napi); | |
1135 | temp = smsc911x_reg_read(pdata, INT_EN); | |
1136 | temp |= INT_EN_RSFL_EN_; | |
1137 | smsc911x_reg_write(pdata, INT_EN, temp); | |
1138 | break; | |
1139 | } | |
1140 | ||
1141 | /* Count packet for NAPI scheduling, even if it has an error. | |
1142 | * Error packets still require cycles to discard */ | |
1143 | npackets++; | |
1144 | ||
1145 | pktlength = ((rxstat & 0x3FFF0000) >> 16); | |
1146 | pktwords = (pktlength + NET_IP_ALIGN + 3) >> 2; | |
1147 | smsc911x_rx_counterrors(dev, rxstat); | |
1148 | ||
1149 | if (unlikely(rxstat & RX_STS_ES_)) { | |
1150 | SMSC_WARN(pdata, rx_err, | |
1151 | "Discarding packet with error bit set"); | |
1152 | /* Packet has an error, discard it and continue with | |
1153 | * the next */ | |
1154 | smsc911x_rx_fastforward(pdata, pktwords); | |
1155 | dev->stats.rx_dropped++; | |
1156 | continue; | |
1157 | } | |
1158 | ||
1159 | skb = netdev_alloc_skb(dev, pktlength + NET_IP_ALIGN); | |
1160 | if (unlikely(!skb)) { | |
1161 | SMSC_WARN(pdata, rx_err, | |
1162 | "Unable to allocate skb for rx packet"); | |
1163 | /* Drop the packet and stop this polling iteration */ | |
1164 | smsc911x_rx_fastforward(pdata, pktwords); | |
1165 | dev->stats.rx_dropped++; | |
1166 | break; | |
1167 | } | |
1168 | ||
1169 | skb->data = skb->head; | |
1170 | skb_reset_tail_pointer(skb); | |
1171 | ||
1172 | /* Align IP on 16B boundary */ | |
1173 | skb_reserve(skb, NET_IP_ALIGN); | |
1174 | skb_put(skb, pktlength - 4); | |
1175 | pdata->ops->rx_readfifo(pdata, | |
1176 | (unsigned int *)skb->head, pktwords); | |
1177 | skb->protocol = eth_type_trans(skb, dev); | |
1178 | skb_checksum_none_assert(skb); | |
1179 | netif_receive_skb(skb); | |
1180 | ||
1181 | /* Update counters */ | |
1182 | dev->stats.rx_packets++; | |
1183 | dev->stats.rx_bytes += (pktlength - 4); | |
1184 | } | |
1185 | ||
1186 | /* Return total received packets */ | |
1187 | return npackets; | |
1188 | } | |
1189 | ||
1190 | /* Returns hash bit number for given MAC address | |
1191 | * Example: | |
1192 | * 01 00 5E 00 00 01 -> returns bit number 31 */ | |
1193 | static unsigned int smsc911x_hash(char addr[ETH_ALEN]) | |
1194 | { | |
1195 | return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; | |
1196 | } | |
1197 | ||
1198 | static void smsc911x_rx_multicast_update(struct smsc911x_data *pdata) | |
1199 | { | |
1200 | /* Performs the multicast & mac_cr update. This is called when | |
1201 | * safe on the current hardware, and with the mac_lock held */ | |
1202 | unsigned int mac_cr; | |
1203 | ||
1204 | SMSC_ASSERT_MAC_LOCK(pdata); | |
1205 | ||
1206 | mac_cr = smsc911x_mac_read(pdata, MAC_CR); | |
1207 | mac_cr |= pdata->set_bits_mask; | |
1208 | mac_cr &= ~(pdata->clear_bits_mask); | |
1209 | smsc911x_mac_write(pdata, MAC_CR, mac_cr); | |
1210 | smsc911x_mac_write(pdata, HASHH, pdata->hashhi); | |
1211 | smsc911x_mac_write(pdata, HASHL, pdata->hashlo); | |
1212 | SMSC_TRACE(pdata, hw, "maccr 0x%08X, HASHH 0x%08X, HASHL 0x%08X", | |
1213 | mac_cr, pdata->hashhi, pdata->hashlo); | |
1214 | } | |
1215 | ||
1216 | static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata) | |
1217 | { | |
1218 | unsigned int mac_cr; | |
1219 | ||
1220 | /* This function is only called for older LAN911x devices | |
1221 | * (revA or revB), where MAC_CR, HASHH and HASHL should not | |
1222 | * be modified during Rx - newer devices immediately update the | |
1223 | * registers. | |
1224 | * | |
1225 | * This is called from interrupt context */ | |
1226 | ||
1227 | spin_lock(&pdata->mac_lock); | |
1228 | ||
1229 | /* Check Rx has stopped */ | |
1230 | if (smsc911x_mac_read(pdata, MAC_CR) & MAC_CR_RXEN_) | |
1231 | SMSC_WARN(pdata, drv, "Rx not stopped"); | |
1232 | ||
1233 | /* Perform the update - safe to do now Rx has stopped */ | |
1234 | smsc911x_rx_multicast_update(pdata); | |
1235 | ||
1236 | /* Re-enable Rx */ | |
1237 | mac_cr = smsc911x_mac_read(pdata, MAC_CR); | |
1238 | mac_cr |= MAC_CR_RXEN_; | |
1239 | smsc911x_mac_write(pdata, MAC_CR, mac_cr); | |
1240 | ||
1241 | pdata->multicast_update_pending = 0; | |
1242 | ||
1243 | spin_unlock(&pdata->mac_lock); | |
1244 | } | |
1245 | ||
1246 | static int smsc911x_soft_reset(struct smsc911x_data *pdata) | |
1247 | { | |
1248 | unsigned int timeout; | |
1249 | unsigned int temp; | |
1250 | ||
1251 | /* Reset the LAN911x */ | |
1252 | smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_); | |
1253 | timeout = 10; | |
1254 | do { | |
1255 | udelay(10); | |
1256 | temp = smsc911x_reg_read(pdata, HW_CFG); | |
1257 | } while ((--timeout) && (temp & HW_CFG_SRST_)); | |
1258 | ||
1259 | if (unlikely(temp & HW_CFG_SRST_)) { | |
1260 | SMSC_WARN(pdata, drv, "Failed to complete reset"); | |
1261 | return -EIO; | |
1262 | } | |
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | /* Sets the device MAC address to dev_addr, called with mac_lock held */ | |
1267 | static void | |
1268 | smsc911x_set_hw_mac_address(struct smsc911x_data *pdata, u8 dev_addr[6]) | |
1269 | { | |
1270 | u32 mac_high16 = (dev_addr[5] << 8) | dev_addr[4]; | |
1271 | u32 mac_low32 = (dev_addr[3] << 24) | (dev_addr[2] << 16) | | |
1272 | (dev_addr[1] << 8) | dev_addr[0]; | |
1273 | ||
1274 | SMSC_ASSERT_MAC_LOCK(pdata); | |
1275 | ||
1276 | smsc911x_mac_write(pdata, ADDRH, mac_high16); | |
1277 | smsc911x_mac_write(pdata, ADDRL, mac_low32); | |
1278 | } | |
1279 | ||
1280 | static int smsc911x_open(struct net_device *dev) | |
1281 | { | |
1282 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1283 | unsigned int timeout; | |
1284 | unsigned int temp; | |
1285 | unsigned int intcfg; | |
1286 | ||
1287 | /* if the phy is not yet registered, retry later*/ | |
1288 | if (!pdata->phy_dev) { | |
1289 | SMSC_WARN(pdata, hw, "phy_dev is NULL"); | |
1290 | return -EAGAIN; | |
1291 | } | |
1292 | ||
1293 | if (!is_valid_ether_addr(dev->dev_addr)) { | |
1294 | SMSC_WARN(pdata, hw, "dev_addr is not a valid MAC address"); | |
1295 | return -EADDRNOTAVAIL; | |
1296 | } | |
1297 | ||
1298 | /* Reset the LAN911x */ | |
1299 | if (smsc911x_soft_reset(pdata)) { | |
1300 | SMSC_WARN(pdata, hw, "soft reset failed"); | |
1301 | return -EIO; | |
1302 | } | |
1303 | ||
1304 | smsc911x_reg_write(pdata, HW_CFG, 0x00050000); | |
1305 | smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740); | |
1306 | ||
1307 | /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */ | |
1308 | spin_lock_irq(&pdata->mac_lock); | |
1309 | smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q); | |
1310 | spin_unlock_irq(&pdata->mac_lock); | |
1311 | ||
1312 | /* Make sure EEPROM has finished loading before setting GPIO_CFG */ | |
1313 | timeout = 50; | |
1314 | while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) && | |
1315 | --timeout) { | |
1316 | udelay(10); | |
1317 | } | |
1318 | ||
1319 | if (unlikely(timeout == 0)) | |
1320 | SMSC_WARN(pdata, ifup, | |
1321 | "Timed out waiting for EEPROM busy bit to clear"); | |
1322 | ||
1323 | smsc911x_reg_write(pdata, GPIO_CFG, 0x70070000); | |
1324 | ||
1325 | /* The soft reset above cleared the device's MAC address, | |
1326 | * restore it from local copy (set in probe) */ | |
1327 | spin_lock_irq(&pdata->mac_lock); | |
1328 | smsc911x_set_hw_mac_address(pdata, dev->dev_addr); | |
1329 | spin_unlock_irq(&pdata->mac_lock); | |
1330 | ||
1331 | /* Initialise irqs, but leave all sources disabled */ | |
1332 | smsc911x_reg_write(pdata, INT_EN, 0); | |
1333 | smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); | |
1334 | ||
1335 | /* Set interrupt deassertion to 100uS */ | |
1336 | intcfg = ((10 << 24) | INT_CFG_IRQ_EN_); | |
1337 | ||
1338 | if (pdata->config.irq_polarity) { | |
1339 | SMSC_TRACE(pdata, ifup, "irq polarity: active high"); | |
1340 | intcfg |= INT_CFG_IRQ_POL_; | |
1341 | } else { | |
1342 | SMSC_TRACE(pdata, ifup, "irq polarity: active low"); | |
1343 | } | |
1344 | ||
1345 | if (pdata->config.irq_type) { | |
1346 | SMSC_TRACE(pdata, ifup, "irq type: push-pull"); | |
1347 | intcfg |= INT_CFG_IRQ_TYPE_; | |
1348 | } else { | |
1349 | SMSC_TRACE(pdata, ifup, "irq type: open drain"); | |
1350 | } | |
1351 | ||
1352 | smsc911x_reg_write(pdata, INT_CFG, intcfg); | |
1353 | ||
1354 | SMSC_TRACE(pdata, ifup, "Testing irq handler using IRQ %d", dev->irq); | |
1355 | pdata->software_irq_signal = 0; | |
1356 | smp_wmb(); | |
1357 | ||
1358 | temp = smsc911x_reg_read(pdata, INT_EN); | |
1359 | temp |= INT_EN_SW_INT_EN_; | |
1360 | smsc911x_reg_write(pdata, INT_EN, temp); | |
1361 | ||
1362 | timeout = 1000; | |
1363 | while (timeout--) { | |
1364 | if (pdata->software_irq_signal) | |
1365 | break; | |
1366 | msleep(1); | |
1367 | } | |
1368 | ||
1369 | if (!pdata->software_irq_signal) { | |
1370 | netdev_warn(dev, "ISR failed signaling test (IRQ %d)\n", | |
1371 | dev->irq); | |
1372 | return -ENODEV; | |
1373 | } | |
1374 | SMSC_TRACE(pdata, ifup, "IRQ handler passed test using IRQ %d", | |
1375 | dev->irq); | |
1376 | ||
1377 | netdev_info(dev, "SMSC911x/921x identified at %#08lx, IRQ: %d\n", | |
1378 | (unsigned long)pdata->ioaddr, dev->irq); | |
1379 | ||
1380 | /* Reset the last known duplex and carrier */ | |
1381 | pdata->last_duplex = -1; | |
1382 | pdata->last_carrier = -1; | |
1383 | ||
1384 | /* Bring the PHY up */ | |
1385 | phy_start(pdata->phy_dev); | |
1386 | ||
1387 | temp = smsc911x_reg_read(pdata, HW_CFG); | |
1388 | /* Preserve TX FIFO size and external PHY configuration */ | |
1389 | temp &= (HW_CFG_TX_FIF_SZ_|0x00000FFF); | |
1390 | temp |= HW_CFG_SF_; | |
1391 | smsc911x_reg_write(pdata, HW_CFG, temp); | |
1392 | ||
1393 | temp = smsc911x_reg_read(pdata, FIFO_INT); | |
1394 | temp |= FIFO_INT_TX_AVAIL_LEVEL_; | |
1395 | temp &= ~(FIFO_INT_RX_STS_LEVEL_); | |
1396 | smsc911x_reg_write(pdata, FIFO_INT, temp); | |
1397 | ||
1398 | /* set RX Data offset to 2 bytes for alignment */ | |
1399 | smsc911x_reg_write(pdata, RX_CFG, (2 << 8)); | |
1400 | ||
1401 | /* enable NAPI polling before enabling RX interrupts */ | |
1402 | napi_enable(&pdata->napi); | |
1403 | ||
1404 | temp = smsc911x_reg_read(pdata, INT_EN); | |
1405 | temp |= (INT_EN_TDFA_EN_ | INT_EN_RSFL_EN_ | INT_EN_RXSTOP_INT_EN_); | |
1406 | smsc911x_reg_write(pdata, INT_EN, temp); | |
1407 | ||
1408 | spin_lock_irq(&pdata->mac_lock); | |
1409 | temp = smsc911x_mac_read(pdata, MAC_CR); | |
1410 | temp |= (MAC_CR_TXEN_ | MAC_CR_RXEN_ | MAC_CR_HBDIS_); | |
1411 | smsc911x_mac_write(pdata, MAC_CR, temp); | |
1412 | spin_unlock_irq(&pdata->mac_lock); | |
1413 | ||
1414 | smsc911x_reg_write(pdata, TX_CFG, TX_CFG_TX_ON_); | |
1415 | ||
1416 | netif_start_queue(dev); | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | /* Entry point for stopping the interface */ | |
1421 | static int smsc911x_stop(struct net_device *dev) | |
1422 | { | |
1423 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1424 | unsigned int temp; | |
1425 | ||
1426 | /* Disable all device interrupts */ | |
1427 | temp = smsc911x_reg_read(pdata, INT_CFG); | |
1428 | temp &= ~INT_CFG_IRQ_EN_; | |
1429 | smsc911x_reg_write(pdata, INT_CFG, temp); | |
1430 | ||
1431 | /* Stop Tx and Rx polling */ | |
1432 | netif_stop_queue(dev); | |
1433 | napi_disable(&pdata->napi); | |
1434 | ||
1435 | /* At this point all Rx and Tx activity is stopped */ | |
1436 | dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); | |
1437 | smsc911x_tx_update_txcounters(dev); | |
1438 | ||
1439 | /* Bring the PHY down */ | |
1440 | if (pdata->phy_dev) | |
1441 | phy_stop(pdata->phy_dev); | |
1442 | ||
1443 | SMSC_TRACE(pdata, ifdown, "Interface stopped"); | |
1444 | return 0; | |
1445 | } | |
1446 | ||
1447 | /* Entry point for transmitting a packet */ | |
1448 | static int smsc911x_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1449 | { | |
1450 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1451 | unsigned int freespace; | |
1452 | unsigned int tx_cmd_a; | |
1453 | unsigned int tx_cmd_b; | |
1454 | unsigned int temp; | |
1455 | u32 wrsz; | |
1456 | ulong bufp; | |
1457 | ||
1458 | freespace = smsc911x_reg_read(pdata, TX_FIFO_INF) & TX_FIFO_INF_TDFREE_; | |
1459 | ||
1460 | if (unlikely(freespace < TX_FIFO_LOW_THRESHOLD)) | |
1461 | SMSC_WARN(pdata, tx_err, | |
1462 | "Tx data fifo low, space available: %d", freespace); | |
1463 | ||
1464 | /* Word alignment adjustment */ | |
1465 | tx_cmd_a = (u32)((ulong)skb->data & 0x03) << 16; | |
1466 | tx_cmd_a |= TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; | |
1467 | tx_cmd_a |= (unsigned int)skb->len; | |
1468 | ||
1469 | tx_cmd_b = ((unsigned int)skb->len) << 16; | |
1470 | tx_cmd_b |= (unsigned int)skb->len; | |
1471 | ||
1472 | smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_a); | |
1473 | smsc911x_reg_write(pdata, TX_DATA_FIFO, tx_cmd_b); | |
1474 | ||
1475 | bufp = (ulong)skb->data & (~0x3); | |
1476 | wrsz = (u32)skb->len + 3; | |
1477 | wrsz += (u32)((ulong)skb->data & 0x3); | |
1478 | wrsz >>= 2; | |
1479 | ||
1480 | pdata->ops->tx_writefifo(pdata, (unsigned int *)bufp, wrsz); | |
1481 | freespace -= (skb->len + 32); | |
1482 | skb_tx_timestamp(skb); | |
1483 | dev_kfree_skb(skb); | |
1484 | ||
1485 | if (unlikely(smsc911x_tx_get_txstatcount(pdata) >= 30)) | |
1486 | smsc911x_tx_update_txcounters(dev); | |
1487 | ||
1488 | if (freespace < TX_FIFO_LOW_THRESHOLD) { | |
1489 | netif_stop_queue(dev); | |
1490 | temp = smsc911x_reg_read(pdata, FIFO_INT); | |
1491 | temp &= 0x00FFFFFF; | |
1492 | temp |= 0x32000000; | |
1493 | smsc911x_reg_write(pdata, FIFO_INT, temp); | |
1494 | } | |
1495 | ||
1496 | return NETDEV_TX_OK; | |
1497 | } | |
1498 | ||
1499 | /* Entry point for getting status counters */ | |
1500 | static struct net_device_stats *smsc911x_get_stats(struct net_device *dev) | |
1501 | { | |
1502 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1503 | smsc911x_tx_update_txcounters(dev); | |
1504 | dev->stats.rx_dropped += smsc911x_reg_read(pdata, RX_DROP); | |
1505 | return &dev->stats; | |
1506 | } | |
1507 | ||
1508 | /* Entry point for setting addressing modes */ | |
1509 | static void smsc911x_set_multicast_list(struct net_device *dev) | |
1510 | { | |
1511 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1512 | unsigned long flags; | |
1513 | ||
1514 | if (dev->flags & IFF_PROMISC) { | |
1515 | /* Enabling promiscuous mode */ | |
1516 | pdata->set_bits_mask = MAC_CR_PRMS_; | |
1517 | pdata->clear_bits_mask = (MAC_CR_MCPAS_ | MAC_CR_HPFILT_); | |
1518 | pdata->hashhi = 0; | |
1519 | pdata->hashlo = 0; | |
1520 | } else if (dev->flags & IFF_ALLMULTI) { | |
1521 | /* Enabling all multicast mode */ | |
1522 | pdata->set_bits_mask = MAC_CR_MCPAS_; | |
1523 | pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_HPFILT_); | |
1524 | pdata->hashhi = 0; | |
1525 | pdata->hashlo = 0; | |
1526 | } else if (!netdev_mc_empty(dev)) { | |
1527 | /* Enabling specific multicast addresses */ | |
1528 | unsigned int hash_high = 0; | |
1529 | unsigned int hash_low = 0; | |
1530 | struct netdev_hw_addr *ha; | |
1531 | ||
1532 | pdata->set_bits_mask = MAC_CR_HPFILT_; | |
1533 | pdata->clear_bits_mask = (MAC_CR_PRMS_ | MAC_CR_MCPAS_); | |
1534 | ||
1535 | netdev_for_each_mc_addr(ha, dev) { | |
1536 | unsigned int bitnum = smsc911x_hash(ha->addr); | |
1537 | unsigned int mask = 0x01 << (bitnum & 0x1F); | |
1538 | ||
1539 | if (bitnum & 0x20) | |
1540 | hash_high |= mask; | |
1541 | else | |
1542 | hash_low |= mask; | |
1543 | } | |
1544 | ||
1545 | pdata->hashhi = hash_high; | |
1546 | pdata->hashlo = hash_low; | |
1547 | } else { | |
1548 | /* Enabling local MAC address only */ | |
1549 | pdata->set_bits_mask = 0; | |
1550 | pdata->clear_bits_mask = | |
1551 | (MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); | |
1552 | pdata->hashhi = 0; | |
1553 | pdata->hashlo = 0; | |
1554 | } | |
1555 | ||
1556 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
1557 | ||
1558 | if (pdata->generation <= 1) { | |
1559 | /* Older hardware revision - cannot change these flags while | |
1560 | * receiving data */ | |
1561 | if (!pdata->multicast_update_pending) { | |
1562 | unsigned int temp; | |
1563 | SMSC_TRACE(pdata, hw, "scheduling mcast update"); | |
1564 | pdata->multicast_update_pending = 1; | |
1565 | ||
1566 | /* Request the hardware to stop, then perform the | |
1567 | * update when we get an RX_STOP interrupt */ | |
1568 | temp = smsc911x_mac_read(pdata, MAC_CR); | |
1569 | temp &= ~(MAC_CR_RXEN_); | |
1570 | smsc911x_mac_write(pdata, MAC_CR, temp); | |
1571 | } else { | |
1572 | /* There is another update pending, this should now | |
1573 | * use the newer values */ | |
1574 | } | |
1575 | } else { | |
1576 | /* Newer hardware revision - can write immediately */ | |
1577 | smsc911x_rx_multicast_update(pdata); | |
1578 | } | |
1579 | ||
1580 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
1581 | } | |
1582 | ||
1583 | static irqreturn_t smsc911x_irqhandler(int irq, void *dev_id) | |
1584 | { | |
1585 | struct net_device *dev = dev_id; | |
1586 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1587 | u32 intsts = smsc911x_reg_read(pdata, INT_STS); | |
1588 | u32 inten = smsc911x_reg_read(pdata, INT_EN); | |
1589 | int serviced = IRQ_NONE; | |
1590 | u32 temp; | |
1591 | ||
1592 | if (unlikely(intsts & inten & INT_STS_SW_INT_)) { | |
1593 | temp = smsc911x_reg_read(pdata, INT_EN); | |
1594 | temp &= (~INT_EN_SW_INT_EN_); | |
1595 | smsc911x_reg_write(pdata, INT_EN, temp); | |
1596 | smsc911x_reg_write(pdata, INT_STS, INT_STS_SW_INT_); | |
1597 | pdata->software_irq_signal = 1; | |
1598 | smp_wmb(); | |
1599 | serviced = IRQ_HANDLED; | |
1600 | } | |
1601 | ||
1602 | if (unlikely(intsts & inten & INT_STS_RXSTOP_INT_)) { | |
1603 | /* Called when there is a multicast update scheduled and | |
1604 | * it is now safe to complete the update */ | |
1605 | SMSC_TRACE(pdata, intr, "RX Stop interrupt"); | |
1606 | smsc911x_reg_write(pdata, INT_STS, INT_STS_RXSTOP_INT_); | |
1607 | if (pdata->multicast_update_pending) | |
1608 | smsc911x_rx_multicast_update_workaround(pdata); | |
1609 | serviced = IRQ_HANDLED; | |
1610 | } | |
1611 | ||
1612 | if (intsts & inten & INT_STS_TDFA_) { | |
1613 | temp = smsc911x_reg_read(pdata, FIFO_INT); | |
1614 | temp |= FIFO_INT_TX_AVAIL_LEVEL_; | |
1615 | smsc911x_reg_write(pdata, FIFO_INT, temp); | |
1616 | smsc911x_reg_write(pdata, INT_STS, INT_STS_TDFA_); | |
1617 | netif_wake_queue(dev); | |
1618 | serviced = IRQ_HANDLED; | |
1619 | } | |
1620 | ||
1621 | if (unlikely(intsts & inten & INT_STS_RXE_)) { | |
1622 | SMSC_TRACE(pdata, intr, "RX Error interrupt"); | |
1623 | smsc911x_reg_write(pdata, INT_STS, INT_STS_RXE_); | |
1624 | serviced = IRQ_HANDLED; | |
1625 | } | |
1626 | ||
1627 | if (likely(intsts & inten & INT_STS_RSFL_)) { | |
1628 | if (likely(napi_schedule_prep(&pdata->napi))) { | |
1629 | /* Disable Rx interrupts */ | |
1630 | temp = smsc911x_reg_read(pdata, INT_EN); | |
1631 | temp &= (~INT_EN_RSFL_EN_); | |
1632 | smsc911x_reg_write(pdata, INT_EN, temp); | |
1633 | /* Schedule a NAPI poll */ | |
1634 | __napi_schedule(&pdata->napi); | |
1635 | } else { | |
1636 | SMSC_WARN(pdata, rx_err, "napi_schedule_prep failed"); | |
1637 | } | |
1638 | serviced = IRQ_HANDLED; | |
1639 | } | |
1640 | ||
1641 | return serviced; | |
1642 | } | |
1643 | ||
1644 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1645 | static void smsc911x_poll_controller(struct net_device *dev) | |
1646 | { | |
1647 | disable_irq(dev->irq); | |
1648 | smsc911x_irqhandler(0, dev); | |
1649 | enable_irq(dev->irq); | |
1650 | } | |
1651 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1652 | ||
1653 | static int smsc911x_set_mac_address(struct net_device *dev, void *p) | |
1654 | { | |
1655 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1656 | struct sockaddr *addr = p; | |
1657 | ||
1658 | /* On older hardware revisions we cannot change the mac address | |
1659 | * registers while receiving data. Newer devices can safely change | |
1660 | * this at any time. */ | |
1661 | if (pdata->generation <= 1 && netif_running(dev)) | |
1662 | return -EBUSY; | |
1663 | ||
1664 | if (!is_valid_ether_addr(addr->sa_data)) | |
1665 | return -EADDRNOTAVAIL; | |
1666 | ||
1667 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
1668 | ||
1669 | spin_lock_irq(&pdata->mac_lock); | |
1670 | smsc911x_set_hw_mac_address(pdata, dev->dev_addr); | |
1671 | spin_unlock_irq(&pdata->mac_lock); | |
1672 | ||
1673 | netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); | |
1674 | ||
1675 | return 0; | |
1676 | } | |
1677 | ||
1678 | /* Standard ioctls for mii-tool */ | |
1679 | static int smsc911x_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
1680 | { | |
1681 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1682 | ||
1683 | if (!netif_running(dev) || !pdata->phy_dev) | |
1684 | return -EINVAL; | |
1685 | ||
1686 | return phy_mii_ioctl(pdata->phy_dev, ifr, cmd); | |
1687 | } | |
1688 | ||
1689 | static int | |
1690 | smsc911x_ethtool_getsettings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1691 | { | |
1692 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1693 | ||
1694 | cmd->maxtxpkt = 1; | |
1695 | cmd->maxrxpkt = 1; | |
1696 | return phy_ethtool_gset(pdata->phy_dev, cmd); | |
1697 | } | |
1698 | ||
1699 | static int | |
1700 | smsc911x_ethtool_setsettings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1701 | { | |
1702 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1703 | ||
1704 | return phy_ethtool_sset(pdata->phy_dev, cmd); | |
1705 | } | |
1706 | ||
1707 | static void smsc911x_ethtool_getdrvinfo(struct net_device *dev, | |
1708 | struct ethtool_drvinfo *info) | |
1709 | { | |
1710 | strlcpy(info->driver, SMSC_CHIPNAME, sizeof(info->driver)); | |
1711 | strlcpy(info->version, SMSC_DRV_VERSION, sizeof(info->version)); | |
1712 | strlcpy(info->bus_info, dev_name(dev->dev.parent), | |
1713 | sizeof(info->bus_info)); | |
1714 | } | |
1715 | ||
1716 | static int smsc911x_ethtool_nwayreset(struct net_device *dev) | |
1717 | { | |
1718 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1719 | ||
1720 | return phy_start_aneg(pdata->phy_dev); | |
1721 | } | |
1722 | ||
1723 | static u32 smsc911x_ethtool_getmsglevel(struct net_device *dev) | |
1724 | { | |
1725 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1726 | return pdata->msg_enable; | |
1727 | } | |
1728 | ||
1729 | static void smsc911x_ethtool_setmsglevel(struct net_device *dev, u32 level) | |
1730 | { | |
1731 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1732 | pdata->msg_enable = level; | |
1733 | } | |
1734 | ||
1735 | static int smsc911x_ethtool_getregslen(struct net_device *dev) | |
1736 | { | |
1737 | return (((E2P_DATA - ID_REV) / 4 + 1) + (WUCSR - MAC_CR) + 1 + 32) * | |
1738 | sizeof(u32); | |
1739 | } | |
1740 | ||
1741 | static void | |
1742 | smsc911x_ethtool_getregs(struct net_device *dev, struct ethtool_regs *regs, | |
1743 | void *buf) | |
1744 | { | |
1745 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1746 | struct phy_device *phy_dev = pdata->phy_dev; | |
1747 | unsigned long flags; | |
1748 | unsigned int i; | |
1749 | unsigned int j = 0; | |
1750 | u32 *data = buf; | |
1751 | ||
1752 | regs->version = pdata->idrev; | |
1753 | for (i = ID_REV; i <= E2P_DATA; i += (sizeof(u32))) | |
1754 | data[j++] = smsc911x_reg_read(pdata, i); | |
1755 | ||
1756 | for (i = MAC_CR; i <= WUCSR; i++) { | |
1757 | spin_lock_irqsave(&pdata->mac_lock, flags); | |
1758 | data[j++] = smsc911x_mac_read(pdata, i); | |
1759 | spin_unlock_irqrestore(&pdata->mac_lock, flags); | |
1760 | } | |
1761 | ||
1762 | for (i = 0; i <= 31; i++) | |
1763 | data[j++] = smsc911x_mii_read(phy_dev->bus, phy_dev->addr, i); | |
1764 | } | |
1765 | ||
1766 | static void smsc911x_eeprom_enable_access(struct smsc911x_data *pdata) | |
1767 | { | |
1768 | unsigned int temp = smsc911x_reg_read(pdata, GPIO_CFG); | |
1769 | temp &= ~GPIO_CFG_EEPR_EN_; | |
1770 | smsc911x_reg_write(pdata, GPIO_CFG, temp); | |
1771 | msleep(1); | |
1772 | } | |
1773 | ||
1774 | static int smsc911x_eeprom_send_cmd(struct smsc911x_data *pdata, u32 op) | |
1775 | { | |
1776 | int timeout = 100; | |
1777 | u32 e2cmd; | |
1778 | ||
1779 | SMSC_TRACE(pdata, drv, "op 0x%08x", op); | |
1780 | if (smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) { | |
1781 | SMSC_WARN(pdata, drv, "Busy at start"); | |
1782 | return -EBUSY; | |
1783 | } | |
1784 | ||
1785 | e2cmd = op | E2P_CMD_EPC_BUSY_; | |
1786 | smsc911x_reg_write(pdata, E2P_CMD, e2cmd); | |
1787 | ||
1788 | do { | |
1789 | msleep(1); | |
1790 | e2cmd = smsc911x_reg_read(pdata, E2P_CMD); | |
1791 | } while ((e2cmd & E2P_CMD_EPC_BUSY_) && (--timeout)); | |
1792 | ||
1793 | if (!timeout) { | |
1794 | SMSC_TRACE(pdata, drv, "TIMED OUT"); | |
1795 | return -EAGAIN; | |
1796 | } | |
1797 | ||
1798 | if (e2cmd & E2P_CMD_EPC_TIMEOUT_) { | |
1799 | SMSC_TRACE(pdata, drv, "Error occurred during eeprom operation"); | |
1800 | return -EINVAL; | |
1801 | } | |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | ||
1806 | static int smsc911x_eeprom_read_location(struct smsc911x_data *pdata, | |
1807 | u8 address, u8 *data) | |
1808 | { | |
1809 | u32 op = E2P_CMD_EPC_CMD_READ_ | address; | |
1810 | int ret; | |
1811 | ||
1812 | SMSC_TRACE(pdata, drv, "address 0x%x", address); | |
1813 | ret = smsc911x_eeprom_send_cmd(pdata, op); | |
1814 | ||
1815 | if (!ret) | |
1816 | data[address] = smsc911x_reg_read(pdata, E2P_DATA); | |
1817 | ||
1818 | return ret; | |
1819 | } | |
1820 | ||
1821 | static int smsc911x_eeprom_write_location(struct smsc911x_data *pdata, | |
1822 | u8 address, u8 data) | |
1823 | { | |
1824 | u32 op = E2P_CMD_EPC_CMD_ERASE_ | address; | |
1825 | u32 temp; | |
1826 | int ret; | |
1827 | ||
1828 | SMSC_TRACE(pdata, drv, "address 0x%x, data 0x%x", address, data); | |
1829 | ret = smsc911x_eeprom_send_cmd(pdata, op); | |
1830 | ||
1831 | if (!ret) { | |
1832 | op = E2P_CMD_EPC_CMD_WRITE_ | address; | |
1833 | smsc911x_reg_write(pdata, E2P_DATA, (u32)data); | |
1834 | ||
1835 | /* Workaround for hardware read-after-write restriction */ | |
1836 | temp = smsc911x_reg_read(pdata, BYTE_TEST); | |
1837 | ||
1838 | ret = smsc911x_eeprom_send_cmd(pdata, op); | |
1839 | } | |
1840 | ||
1841 | return ret; | |
1842 | } | |
1843 | ||
1844 | static int smsc911x_ethtool_get_eeprom_len(struct net_device *dev) | |
1845 | { | |
1846 | return SMSC911X_EEPROM_SIZE; | |
1847 | } | |
1848 | ||
1849 | static int smsc911x_ethtool_get_eeprom(struct net_device *dev, | |
1850 | struct ethtool_eeprom *eeprom, u8 *data) | |
1851 | { | |
1852 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1853 | u8 eeprom_data[SMSC911X_EEPROM_SIZE]; | |
1854 | int len; | |
1855 | int i; | |
1856 | ||
1857 | smsc911x_eeprom_enable_access(pdata); | |
1858 | ||
1859 | len = min(eeprom->len, SMSC911X_EEPROM_SIZE); | |
1860 | for (i = 0; i < len; i++) { | |
1861 | int ret = smsc911x_eeprom_read_location(pdata, i, eeprom_data); | |
1862 | if (ret < 0) { | |
1863 | eeprom->len = 0; | |
1864 | return ret; | |
1865 | } | |
1866 | } | |
1867 | ||
1868 | memcpy(data, &eeprom_data[eeprom->offset], len); | |
1869 | eeprom->len = len; | |
1870 | return 0; | |
1871 | } | |
1872 | ||
1873 | static int smsc911x_ethtool_set_eeprom(struct net_device *dev, | |
1874 | struct ethtool_eeprom *eeprom, u8 *data) | |
1875 | { | |
1876 | int ret; | |
1877 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1878 | ||
1879 | smsc911x_eeprom_enable_access(pdata); | |
1880 | smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWEN_); | |
1881 | ret = smsc911x_eeprom_write_location(pdata, eeprom->offset, *data); | |
1882 | smsc911x_eeprom_send_cmd(pdata, E2P_CMD_EPC_CMD_EWDS_); | |
1883 | ||
1884 | /* Single byte write, according to man page */ | |
1885 | eeprom->len = 1; | |
1886 | ||
1887 | return ret; | |
1888 | } | |
1889 | ||
1890 | static const struct ethtool_ops smsc911x_ethtool_ops = { | |
1891 | .get_settings = smsc911x_ethtool_getsettings, | |
1892 | .set_settings = smsc911x_ethtool_setsettings, | |
1893 | .get_link = ethtool_op_get_link, | |
1894 | .get_drvinfo = smsc911x_ethtool_getdrvinfo, | |
1895 | .nway_reset = smsc911x_ethtool_nwayreset, | |
1896 | .get_msglevel = smsc911x_ethtool_getmsglevel, | |
1897 | .set_msglevel = smsc911x_ethtool_setmsglevel, | |
1898 | .get_regs_len = smsc911x_ethtool_getregslen, | |
1899 | .get_regs = smsc911x_ethtool_getregs, | |
1900 | .get_eeprom_len = smsc911x_ethtool_get_eeprom_len, | |
1901 | .get_eeprom = smsc911x_ethtool_get_eeprom, | |
1902 | .set_eeprom = smsc911x_ethtool_set_eeprom, | |
1903 | }; | |
1904 | ||
1905 | static const struct net_device_ops smsc911x_netdev_ops = { | |
1906 | .ndo_open = smsc911x_open, | |
1907 | .ndo_stop = smsc911x_stop, | |
1908 | .ndo_start_xmit = smsc911x_hard_start_xmit, | |
1909 | .ndo_get_stats = smsc911x_get_stats, | |
1910 | .ndo_set_rx_mode = smsc911x_set_multicast_list, | |
1911 | .ndo_do_ioctl = smsc911x_do_ioctl, | |
1912 | .ndo_change_mtu = eth_change_mtu, | |
1913 | .ndo_validate_addr = eth_validate_addr, | |
1914 | .ndo_set_mac_address = smsc911x_set_mac_address, | |
1915 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1916 | .ndo_poll_controller = smsc911x_poll_controller, | |
1917 | #endif | |
1918 | }; | |
1919 | ||
1920 | /* copies the current mac address from hardware to dev->dev_addr */ | |
1921 | static void __devinit smsc911x_read_mac_address(struct net_device *dev) | |
1922 | { | |
1923 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1924 | u32 mac_high16 = smsc911x_mac_read(pdata, ADDRH); | |
1925 | u32 mac_low32 = smsc911x_mac_read(pdata, ADDRL); | |
1926 | ||
1927 | dev->dev_addr[0] = (u8)(mac_low32); | |
1928 | dev->dev_addr[1] = (u8)(mac_low32 >> 8); | |
1929 | dev->dev_addr[2] = (u8)(mac_low32 >> 16); | |
1930 | dev->dev_addr[3] = (u8)(mac_low32 >> 24); | |
1931 | dev->dev_addr[4] = (u8)(mac_high16); | |
1932 | dev->dev_addr[5] = (u8)(mac_high16 >> 8); | |
1933 | } | |
1934 | ||
1935 | /* Initializing private device structures, only called from probe */ | |
1936 | static int __devinit smsc911x_init(struct net_device *dev) | |
1937 | { | |
1938 | struct smsc911x_data *pdata = netdev_priv(dev); | |
1939 | unsigned int byte_test; | |
1940 | unsigned int to = 100; | |
1941 | ||
1942 | SMSC_TRACE(pdata, probe, "Driver Parameters:"); | |
1943 | SMSC_TRACE(pdata, probe, "LAN base: 0x%08lX", | |
1944 | (unsigned long)pdata->ioaddr); | |
1945 | SMSC_TRACE(pdata, probe, "IRQ: %d", dev->irq); | |
1946 | SMSC_TRACE(pdata, probe, "PHY will be autodetected."); | |
1947 | ||
1948 | spin_lock_init(&pdata->dev_lock); | |
1949 | spin_lock_init(&pdata->mac_lock); | |
1950 | ||
1951 | if (pdata->ioaddr == 0) { | |
1952 | SMSC_WARN(pdata, probe, "pdata->ioaddr: 0x00000000"); | |
1953 | return -ENODEV; | |
1954 | } | |
1955 | ||
1956 | /* | |
1957 | * poll the READY bit in PMT_CTRL. Any other access to the device is | |
1958 | * forbidden while this bit isn't set. Try for 100ms | |
1959 | */ | |
1960 | while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to) | |
1961 | udelay(1000); | |
1962 | if (to == 0) { | |
1963 | pr_err("Device not READY in 100ms aborting\n"); | |
1964 | return -ENODEV; | |
1965 | } | |
1966 | ||
1967 | /* Check byte ordering */ | |
1968 | byte_test = smsc911x_reg_read(pdata, BYTE_TEST); | |
1969 | SMSC_TRACE(pdata, probe, "BYTE_TEST: 0x%08X", byte_test); | |
1970 | if (byte_test == 0x43218765) { | |
1971 | SMSC_TRACE(pdata, probe, "BYTE_TEST looks swapped, " | |
1972 | "applying WORD_SWAP"); | |
1973 | smsc911x_reg_write(pdata, WORD_SWAP, 0xffffffff); | |
1974 | ||
1975 | /* 1 dummy read of BYTE_TEST is needed after a write to | |
1976 | * WORD_SWAP before its contents are valid */ | |
1977 | byte_test = smsc911x_reg_read(pdata, BYTE_TEST); | |
1978 | ||
1979 | byte_test = smsc911x_reg_read(pdata, BYTE_TEST); | |
1980 | } | |
1981 | ||
1982 | if (byte_test != 0x87654321) { | |
1983 | SMSC_WARN(pdata, drv, "BYTE_TEST: 0x%08X", byte_test); | |
1984 | if (((byte_test >> 16) & 0xFFFF) == (byte_test & 0xFFFF)) { | |
1985 | SMSC_WARN(pdata, probe, | |
1986 | "top 16 bits equal to bottom 16 bits"); | |
1987 | SMSC_TRACE(pdata, probe, | |
1988 | "This may mean the chip is set " | |
1989 | "for 32 bit while the bus is reading 16 bit"); | |
1990 | } | |
1991 | return -ENODEV; | |
1992 | } | |
1993 | ||
1994 | /* Default generation to zero (all workarounds apply) */ | |
1995 | pdata->generation = 0; | |
1996 | ||
1997 | pdata->idrev = smsc911x_reg_read(pdata, ID_REV); | |
1998 | switch (pdata->idrev & 0xFFFF0000) { | |
1999 | case 0x01180000: | |
2000 | case 0x01170000: | |
2001 | case 0x01160000: | |
2002 | case 0x01150000: | |
2003 | case 0x218A0000: | |
2004 | /* LAN911[5678] family */ | |
2005 | pdata->generation = pdata->idrev & 0x0000FFFF; | |
2006 | break; | |
2007 | ||
2008 | case 0x118A0000: | |
2009 | case 0x117A0000: | |
2010 | case 0x116A0000: | |
2011 | case 0x115A0000: | |
2012 | /* LAN921[5678] family */ | |
2013 | pdata->generation = 3; | |
2014 | break; | |
2015 | ||
2016 | case 0x92100000: | |
2017 | case 0x92110000: | |
2018 | case 0x92200000: | |
2019 | case 0x92210000: | |
2020 | /* LAN9210/LAN9211/LAN9220/LAN9221 */ | |
2021 | pdata->generation = 4; | |
2022 | break; | |
2023 | ||
2024 | default: | |
2025 | SMSC_WARN(pdata, probe, "LAN911x not identified, idrev: 0x%08X", | |
2026 | pdata->idrev); | |
2027 | return -ENODEV; | |
2028 | } | |
2029 | ||
2030 | SMSC_TRACE(pdata, probe, | |
2031 | "LAN911x identified, idrev: 0x%08X, generation: %d", | |
2032 | pdata->idrev, pdata->generation); | |
2033 | ||
2034 | if (pdata->generation == 0) | |
2035 | SMSC_WARN(pdata, probe, | |
2036 | "This driver is not intended for this chip revision"); | |
2037 | ||
2038 | /* workaround for platforms without an eeprom, where the mac address | |
2039 | * is stored elsewhere and set by the bootloader. This saves the | |
2040 | * mac address before resetting the device */ | |
2041 | if (pdata->config.flags & SMSC911X_SAVE_MAC_ADDRESS) { | |
2042 | spin_lock_irq(&pdata->mac_lock); | |
2043 | smsc911x_read_mac_address(dev); | |
2044 | spin_unlock_irq(&pdata->mac_lock); | |
2045 | } | |
2046 | ||
2047 | /* Reset the LAN911x */ | |
2048 | if (smsc911x_soft_reset(pdata)) | |
2049 | return -ENODEV; | |
2050 | ||
2051 | /* Disable all interrupt sources until we bring the device up */ | |
2052 | smsc911x_reg_write(pdata, INT_EN, 0); | |
2053 | ||
2054 | ether_setup(dev); | |
2055 | dev->flags |= IFF_MULTICAST; | |
2056 | netif_napi_add(dev, &pdata->napi, smsc911x_poll, SMSC_NAPI_WEIGHT); | |
2057 | dev->netdev_ops = &smsc911x_netdev_ops; | |
2058 | dev->ethtool_ops = &smsc911x_ethtool_ops; | |
2059 | ||
2060 | return 0; | |
2061 | } | |
2062 | ||
2063 | static int __devexit smsc911x_drv_remove(struct platform_device *pdev) | |
2064 | { | |
2065 | struct net_device *dev; | |
2066 | struct smsc911x_data *pdata; | |
2067 | struct resource *res; | |
2068 | ||
2069 | dev = platform_get_drvdata(pdev); | |
2070 | BUG_ON(!dev); | |
2071 | pdata = netdev_priv(dev); | |
2072 | BUG_ON(!pdata); | |
2073 | BUG_ON(!pdata->ioaddr); | |
2074 | BUG_ON(!pdata->phy_dev); | |
2075 | ||
2076 | SMSC_TRACE(pdata, ifdown, "Stopping driver"); | |
2077 | ||
2078 | phy_disconnect(pdata->phy_dev); | |
2079 | pdata->phy_dev = NULL; | |
2080 | mdiobus_unregister(pdata->mii_bus); | |
2081 | mdiobus_free(pdata->mii_bus); | |
2082 | ||
2083 | platform_set_drvdata(pdev, NULL); | |
2084 | unregister_netdev(dev); | |
2085 | free_irq(dev->irq, dev); | |
2086 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, | |
2087 | "smsc911x-memory"); | |
2088 | if (!res) | |
2089 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2090 | ||
2091 | release_mem_region(res->start, resource_size(res)); | |
2092 | ||
2093 | iounmap(pdata->ioaddr); | |
2094 | ||
2095 | free_netdev(dev); | |
2096 | ||
2097 | return 0; | |
2098 | } | |
2099 | ||
2100 | /* standard register acces */ | |
2101 | static const struct smsc911x_ops standard_smsc911x_ops = { | |
2102 | .reg_read = __smsc911x_reg_read, | |
2103 | .reg_write = __smsc911x_reg_write, | |
2104 | .rx_readfifo = smsc911x_rx_readfifo, | |
2105 | .tx_writefifo = smsc911x_tx_writefifo, | |
2106 | }; | |
2107 | ||
2108 | /* shifted register access */ | |
2109 | static const struct smsc911x_ops shifted_smsc911x_ops = { | |
2110 | .reg_read = __smsc911x_reg_read_shift, | |
2111 | .reg_write = __smsc911x_reg_write_shift, | |
2112 | .rx_readfifo = smsc911x_rx_readfifo_shift, | |
2113 | .tx_writefifo = smsc911x_tx_writefifo_shift, | |
2114 | }; | |
2115 | ||
2116 | #ifdef CONFIG_OF | |
2117 | static int __devinit smsc911x_probe_config_dt( | |
2118 | struct smsc911x_platform_config *config, | |
2119 | struct device_node *np) | |
2120 | { | |
2121 | const char *mac; | |
2122 | u32 width = 0; | |
2123 | ||
2124 | if (!np) | |
2125 | return -ENODEV; | |
2126 | ||
2127 | config->phy_interface = of_get_phy_mode(np); | |
2128 | ||
2129 | mac = of_get_mac_address(np); | |
2130 | if (mac) | |
2131 | memcpy(config->mac, mac, ETH_ALEN); | |
2132 | ||
2133 | of_property_read_u32(np, "reg-shift", &config->shift); | |
2134 | ||
2135 | of_property_read_u32(np, "reg-io-width", &width); | |
2136 | if (width == 4) | |
2137 | config->flags |= SMSC911X_USE_32BIT; | |
2138 | else | |
2139 | config->flags |= SMSC911X_USE_16BIT; | |
2140 | ||
2141 | if (of_get_property(np, "smsc,irq-active-high", NULL)) | |
2142 | config->irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_HIGH; | |
2143 | ||
2144 | if (of_get_property(np, "smsc,irq-push-pull", NULL)) | |
2145 | config->irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL; | |
2146 | ||
2147 | if (of_get_property(np, "smsc,force-internal-phy", NULL)) | |
2148 | config->flags |= SMSC911X_FORCE_INTERNAL_PHY; | |
2149 | ||
2150 | if (of_get_property(np, "smsc,force-external-phy", NULL)) | |
2151 | config->flags |= SMSC911X_FORCE_EXTERNAL_PHY; | |
2152 | ||
2153 | if (of_get_property(np, "smsc,save-mac-address", NULL)) | |
2154 | config->flags |= SMSC911X_SAVE_MAC_ADDRESS; | |
2155 | ||
2156 | return 0; | |
2157 | } | |
2158 | #else | |
2159 | static inline int smsc911x_probe_config_dt( | |
2160 | struct smsc911x_platform_config *config, | |
2161 | struct device_node *np) | |
2162 | { | |
2163 | return -ENODEV; | |
2164 | } | |
2165 | #endif /* CONFIG_OF */ | |
2166 | ||
2167 | static int __devinit smsc911x_drv_probe(struct platform_device *pdev) | |
2168 | { | |
2169 | struct device_node *np = pdev->dev.of_node; | |
2170 | struct net_device *dev; | |
2171 | struct smsc911x_data *pdata; | |
2172 | struct smsc911x_platform_config *config = pdev->dev.platform_data; | |
2173 | struct resource *res, *irq_res; | |
2174 | unsigned int intcfg = 0; | |
2175 | int res_size, irq_flags; | |
2176 | int retval; | |
2177 | ||
2178 | pr_info("Driver version %s\n", SMSC_DRV_VERSION); | |
2179 | ||
2180 | res = platform_get_resource_byname(pdev, IORESOURCE_MEM, | |
2181 | "smsc911x-memory"); | |
2182 | if (!res) | |
2183 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2184 | if (!res) { | |
2185 | pr_warn("Could not allocate resource\n"); | |
2186 | retval = -ENODEV; | |
2187 | goto out_0; | |
2188 | } | |
2189 | res_size = resource_size(res); | |
2190 | ||
2191 | irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
2192 | if (!irq_res) { | |
2193 | pr_warn("Could not allocate irq resource\n"); | |
2194 | retval = -ENODEV; | |
2195 | goto out_0; | |
2196 | } | |
2197 | ||
2198 | if (!request_mem_region(res->start, res_size, SMSC_CHIPNAME)) { | |
2199 | retval = -EBUSY; | |
2200 | goto out_0; | |
2201 | } | |
2202 | ||
2203 | dev = alloc_etherdev(sizeof(struct smsc911x_data)); | |
2204 | if (!dev) { | |
2205 | pr_warn("Could not allocate device\n"); | |
2206 | retval = -ENOMEM; | |
2207 | goto out_release_io_1; | |
2208 | } | |
2209 | ||
2210 | SET_NETDEV_DEV(dev, &pdev->dev); | |
2211 | ||
2212 | pdata = netdev_priv(dev); | |
2213 | ||
2214 | dev->irq = irq_res->start; | |
2215 | irq_flags = irq_res->flags & IRQF_TRIGGER_MASK; | |
2216 | pdata->ioaddr = ioremap_nocache(res->start, res_size); | |
2217 | ||
2218 | pdata->dev = dev; | |
2219 | pdata->msg_enable = ((1 << debug) - 1); | |
2220 | ||
2221 | if (pdata->ioaddr == NULL) { | |
2222 | SMSC_WARN(pdata, probe, "Error smsc911x base address invalid"); | |
2223 | retval = -ENOMEM; | |
2224 | goto out_free_netdev_2; | |
2225 | } | |
2226 | ||
2227 | retval = smsc911x_probe_config_dt(&pdata->config, np); | |
2228 | if (retval && config) { | |
2229 | /* copy config parameters across to pdata */ | |
2230 | memcpy(&pdata->config, config, sizeof(pdata->config)); | |
2231 | retval = 0; | |
2232 | } | |
2233 | ||
2234 | if (retval) { | |
2235 | SMSC_WARN(pdata, probe, "Error smsc911x config not found"); | |
2236 | goto out_unmap_io_3; | |
2237 | } | |
2238 | ||
2239 | /* assume standard, non-shifted, access to HW registers */ | |
2240 | pdata->ops = &standard_smsc911x_ops; | |
2241 | /* apply the right access if shifting is needed */ | |
2242 | if (pdata->config.shift) | |
2243 | pdata->ops = &shifted_smsc911x_ops; | |
2244 | ||
2245 | retval = smsc911x_init(dev); | |
2246 | if (retval < 0) | |
2247 | goto out_unmap_io_3; | |
2248 | ||
2249 | /* configure irq polarity and type before connecting isr */ | |
2250 | if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH) | |
2251 | intcfg |= INT_CFG_IRQ_POL_; | |
2252 | ||
2253 | if (pdata->config.irq_type == SMSC911X_IRQ_TYPE_PUSH_PULL) | |
2254 | intcfg |= INT_CFG_IRQ_TYPE_; | |
2255 | ||
2256 | smsc911x_reg_write(pdata, INT_CFG, intcfg); | |
2257 | ||
2258 | /* Ensure interrupts are globally disabled before connecting ISR */ | |
2259 | smsc911x_reg_write(pdata, INT_EN, 0); | |
2260 | smsc911x_reg_write(pdata, INT_STS, 0xFFFFFFFF); | |
2261 | ||
2262 | retval = request_irq(dev->irq, smsc911x_irqhandler, | |
2263 | irq_flags | IRQF_SHARED, dev->name, dev); | |
2264 | if (retval) { | |
2265 | SMSC_WARN(pdata, probe, | |
2266 | "Unable to claim requested irq: %d", dev->irq); | |
2267 | goto out_unmap_io_3; | |
2268 | } | |
2269 | ||
2270 | platform_set_drvdata(pdev, dev); | |
2271 | ||
2272 | retval = register_netdev(dev); | |
2273 | if (retval) { | |
2274 | SMSC_WARN(pdata, probe, "Error %i registering device", retval); | |
2275 | goto out_unset_drvdata_4; | |
2276 | } else { | |
2277 | SMSC_TRACE(pdata, probe, | |
2278 | "Network interface: \"%s\"", dev->name); | |
2279 | } | |
2280 | ||
2281 | retval = smsc911x_mii_init(pdev, dev); | |
2282 | if (retval) { | |
2283 | SMSC_WARN(pdata, probe, "Error %i initialising mii", retval); | |
2284 | goto out_unregister_netdev_5; | |
2285 | } | |
2286 | ||
2287 | spin_lock_irq(&pdata->mac_lock); | |
2288 | ||
2289 | /* Check if mac address has been specified when bringing interface up */ | |
2290 | if (is_valid_ether_addr(dev->dev_addr)) { | |
2291 | smsc911x_set_hw_mac_address(pdata, dev->dev_addr); | |
2292 | SMSC_TRACE(pdata, probe, | |
2293 | "MAC Address is specified by configuration"); | |
2294 | } else if (is_valid_ether_addr(pdata->config.mac)) { | |
2295 | memcpy(dev->dev_addr, pdata->config.mac, 6); | |
2296 | SMSC_TRACE(pdata, probe, | |
2297 | "MAC Address specified by platform data"); | |
2298 | } else { | |
2299 | /* Try reading mac address from device. if EEPROM is present | |
2300 | * it will already have been set */ | |
2301 | smsc_get_mac(dev); | |
2302 | ||
2303 | if (is_valid_ether_addr(dev->dev_addr)) { | |
2304 | /* eeprom values are valid so use them */ | |
2305 | SMSC_TRACE(pdata, probe, | |
2306 | "Mac Address is read from LAN911x EEPROM"); | |
2307 | } else { | |
2308 | /* eeprom values are invalid, generate random MAC */ | |
2309 | random_ether_addr(dev->dev_addr); | |
2310 | smsc911x_set_hw_mac_address(pdata, dev->dev_addr); | |
2311 | SMSC_TRACE(pdata, probe, | |
2312 | "MAC Address is set to random_ether_addr"); | |
2313 | } | |
2314 | } | |
2315 | ||
2316 | spin_unlock_irq(&pdata->mac_lock); | |
2317 | ||
2318 | netdev_info(dev, "MAC Address: %pM\n", dev->dev_addr); | |
2319 | ||
2320 | return 0; | |
2321 | ||
2322 | out_unregister_netdev_5: | |
2323 | unregister_netdev(dev); | |
2324 | out_unset_drvdata_4: | |
2325 | platform_set_drvdata(pdev, NULL); | |
2326 | free_irq(dev->irq, dev); | |
2327 | out_unmap_io_3: | |
2328 | iounmap(pdata->ioaddr); | |
2329 | out_free_netdev_2: | |
2330 | free_netdev(dev); | |
2331 | out_release_io_1: | |
2332 | release_mem_region(res->start, resource_size(res)); | |
2333 | out_0: | |
2334 | return retval; | |
2335 | } | |
2336 | ||
2337 | #ifdef CONFIG_PM | |
2338 | /* This implementation assumes the devices remains powered on its VDDVARIO | |
2339 | * pins during suspend. */ | |
2340 | ||
2341 | /* TODO: implement freeze/thaw callbacks for hibernation.*/ | |
2342 | ||
2343 | static int smsc911x_suspend(struct device *dev) | |
2344 | { | |
2345 | struct net_device *ndev = dev_get_drvdata(dev); | |
2346 | struct smsc911x_data *pdata = netdev_priv(ndev); | |
2347 | ||
2348 | /* enable wake on LAN, energy detection and the external PME | |
2349 | * signal. */ | |
2350 | smsc911x_reg_write(pdata, PMT_CTRL, | |
2351 | PMT_CTRL_PM_MODE_D1_ | PMT_CTRL_WOL_EN_ | | |
2352 | PMT_CTRL_ED_EN_ | PMT_CTRL_PME_EN_); | |
2353 | ||
2354 | return 0; | |
2355 | } | |
2356 | ||
2357 | static int smsc911x_resume(struct device *dev) | |
2358 | { | |
2359 | struct net_device *ndev = dev_get_drvdata(dev); | |
2360 | struct smsc911x_data *pdata = netdev_priv(ndev); | |
2361 | unsigned int to = 100; | |
2362 | ||
2363 | /* Note 3.11 from the datasheet: | |
2364 | * "When the LAN9220 is in a power saving state, a write of any | |
2365 | * data to the BYTE_TEST register will wake-up the device." | |
2366 | */ | |
2367 | smsc911x_reg_write(pdata, BYTE_TEST, 0); | |
2368 | ||
2369 | /* poll the READY bit in PMT_CTRL. Any other access to the device is | |
2370 | * forbidden while this bit isn't set. Try for 100ms and return -EIO | |
2371 | * if it failed. */ | |
2372 | while (!(smsc911x_reg_read(pdata, PMT_CTRL) & PMT_CTRL_READY_) && --to) | |
2373 | udelay(1000); | |
2374 | ||
2375 | return (to == 0) ? -EIO : 0; | |
2376 | } | |
2377 | ||
2378 | static const struct dev_pm_ops smsc911x_pm_ops = { | |
2379 | .suspend = smsc911x_suspend, | |
2380 | .resume = smsc911x_resume, | |
2381 | }; | |
2382 | ||
2383 | #define SMSC911X_PM_OPS (&smsc911x_pm_ops) | |
2384 | ||
2385 | #else | |
2386 | #define SMSC911X_PM_OPS NULL | |
2387 | #endif | |
2388 | ||
2389 | static const struct of_device_id smsc911x_dt_ids[] = { | |
2390 | { .compatible = "smsc,lan9115", }, | |
2391 | { /* sentinel */ } | |
2392 | }; | |
2393 | MODULE_DEVICE_TABLE(of, smsc911x_dt_ids); | |
2394 | ||
2395 | static struct platform_driver smsc911x_driver = { | |
2396 | .probe = smsc911x_drv_probe, | |
2397 | .remove = __devexit_p(smsc911x_drv_remove), | |
2398 | .driver = { | |
2399 | .name = SMSC_CHIPNAME, | |
2400 | .owner = THIS_MODULE, | |
2401 | .pm = SMSC911X_PM_OPS, | |
2402 | .of_match_table = smsc911x_dt_ids, | |
2403 | }, | |
2404 | }; | |
2405 | ||
2406 | /* Entry point for loading the module */ | |
2407 | static int __init smsc911x_init_module(void) | |
2408 | { | |
2409 | SMSC_INITIALIZE(); | |
2410 | return platform_driver_register(&smsc911x_driver); | |
2411 | } | |
2412 | ||
2413 | /* entry point for unloading the module */ | |
2414 | static void __exit smsc911x_cleanup_module(void) | |
2415 | { | |
2416 | platform_driver_unregister(&smsc911x_driver); | |
2417 | } | |
2418 | ||
2419 | module_init(smsc911x_init_module); | |
2420 | module_exit(smsc911x_cleanup_module); |