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Commit | Line | Data |
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727c26ed PO |
1 | /* |
2 | * linux/drivers/net/wireless/libertas/if_sdio.c | |
3 | * | |
ad3868b2 | 4 | * Copyright 2007-2008 Pierre Ossman |
727c26ed PO |
5 | * |
6 | * Inspired by if_cs.c, Copyright 2007 Holger Schurig | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or (at | |
11 | * your option) any later version. | |
12 | * | |
13 | * This hardware has more or less no CMD53 support, so all registers | |
14 | * must be accessed using sdio_readb()/sdio_writeb(). | |
15 | * | |
16 | * Transfers must be in one transaction or the firmware goes bonkers. | |
17 | * This means that the transfer must either be small enough to do a | |
18 | * byte based transfer or it must be padded to a multiple of the | |
19 | * current block size. | |
20 | * | |
21 | * As SDIO is still new to the kernel, it is unfortunately common with | |
7e226272 | 22 | * bugs in the host controllers related to that. One such bug is that |
727c26ed PO |
23 | * controllers cannot do transfers that aren't a multiple of 4 bytes. |
24 | * If you don't have time to fix the host controller driver, you can | |
25 | * work around the problem by modifying if_sdio_host_to_card() and | |
26 | * if_sdio_card_to_host() to pad the data. | |
27 | */ | |
28 | ||
0e4e06ae JP |
29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
30 | ||
23827926 | 31 | #include <linux/kernel.h> |
ac5c24e9 | 32 | #include <linux/module.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
727c26ed PO |
34 | #include <linux/firmware.h> |
35 | #include <linux/netdevice.h> | |
36 | #include <linux/delay.h> | |
37 | #include <linux/mmc/card.h> | |
38 | #include <linux/mmc/sdio_func.h> | |
39 | #include <linux/mmc/sdio_ids.h> | |
8a64c0f6 DM |
40 | #include <linux/mmc/sdio.h> |
41 | #include <linux/mmc/host.h> | |
7e1f79a1 | 42 | #include <linux/pm_runtime.h> |
727c26ed PO |
43 | |
44 | #include "host.h" | |
45 | #include "decl.h" | |
46 | #include "defs.h" | |
47 | #include "dev.h" | |
6bc61f4d | 48 | #include "cmd.h" |
727c26ed PO |
49 | #include "if_sdio.h" |
50 | ||
7e1f79a1 DD |
51 | static void if_sdio_interrupt(struct sdio_func *func); |
52 | ||
6bc61f4d BZ |
53 | /* The if_sdio_remove() callback function is called when |
54 | * user removes this module from kernel space or ejects | |
55 | * the card from the slot. The driver handles these 2 cases | |
56 | * differently for SD8688 combo chip. | |
57 | * If the user is removing the module, the FUNC_SHUTDOWN | |
58 | * command for SD8688 is sent to the firmware. | |
59 | * If the card is removed, there is no need to send this command. | |
60 | * | |
61 | * The variable 'user_rmmod' is used to distinguish these two | |
62 | * scenarios. This flag is initialized as FALSE in case the card | |
63 | * is removed, and will be set to TRUE for module removal when | |
64 | * module_exit function is called. | |
65 | */ | |
66 | static u8 user_rmmod; | |
67 | ||
10078321 HS |
68 | static char *lbs_helper_name = NULL; |
69 | module_param_named(helper_name, lbs_helper_name, charp, 0644); | |
727c26ed | 70 | |
10078321 HS |
71 | static char *lbs_fw_name = NULL; |
72 | module_param_named(fw_name, lbs_fw_name, charp, 0644); | |
727c26ed PO |
73 | |
74 | static const struct sdio_device_id if_sdio_ids[] = { | |
e45d8e53 BZ |
75 | { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, |
76 | SDIO_DEVICE_ID_MARVELL_LIBERTAS) }, | |
77 | { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, | |
78 | SDIO_DEVICE_ID_MARVELL_8688WLAN) }, | |
79 | { /* end: all zeroes */ }, | |
727c26ed PO |
80 | }; |
81 | ||
82 | MODULE_DEVICE_TABLE(sdio, if_sdio_ids); | |
83 | ||
3d32a58b DW |
84 | #define MODEL_8385 0x04 |
85 | #define MODEL_8686 0x0b | |
86 | #define MODEL_8688 0x10 | |
87 | ||
88 | static const struct lbs_fw_table fw_table[] = { | |
89 | { MODEL_8385, "libertas/sd8385_helper.bin", "libertas/sd8385.bin" }, | |
90 | { MODEL_8385, "sd8385_helper.bin", "sd8385.bin" }, | |
91 | { MODEL_8686, "libertas/sd8686_v9_helper.bin", "libertas/sd8686_v9.bin" }, | |
92 | { MODEL_8686, "libertas/sd8686_v8_helper.bin", "libertas/sd8686_v8.bin" }, | |
93 | { MODEL_8686, "sd8686_helper.bin", "sd8686.bin" }, | |
94 | { MODEL_8688, "libertas/sd8688_helper.bin", "libertas/sd8688.bin" }, | |
95 | { MODEL_8688, "sd8688_helper.bin", "sd8688.bin" }, | |
96 | { 0, NULL, NULL } | |
727c26ed | 97 | }; |
3d32a58b DW |
98 | MODULE_FIRMWARE("libertas/sd8385_helper.bin"); |
99 | MODULE_FIRMWARE("libertas/sd8385.bin"); | |
a974a4bb BH |
100 | MODULE_FIRMWARE("sd8385_helper.bin"); |
101 | MODULE_FIRMWARE("sd8385.bin"); | |
3d32a58b DW |
102 | MODULE_FIRMWARE("libertas/sd8686_v9_helper.bin"); |
103 | MODULE_FIRMWARE("libertas/sd8686_v9.bin"); | |
104 | MODULE_FIRMWARE("libertas/sd8686_v8_helper.bin"); | |
105 | MODULE_FIRMWARE("libertas/sd8686_v8.bin"); | |
a974a4bb BH |
106 | MODULE_FIRMWARE("sd8686_helper.bin"); |
107 | MODULE_FIRMWARE("sd8686.bin"); | |
3d32a58b DW |
108 | MODULE_FIRMWARE("libertas/sd8688_helper.bin"); |
109 | MODULE_FIRMWARE("libertas/sd8688.bin"); | |
a974a4bb BH |
110 | MODULE_FIRMWARE("sd8688_helper.bin"); |
111 | MODULE_FIRMWARE("sd8688.bin"); | |
727c26ed PO |
112 | |
113 | struct if_sdio_packet { | |
114 | struct if_sdio_packet *next; | |
115 | u16 nb; | |
116 | u8 buffer[0] __attribute__((aligned(4))); | |
117 | }; | |
118 | ||
119 | struct if_sdio_card { | |
120 | struct sdio_func *func; | |
69f9032d | 121 | struct lbs_private *priv; |
727c26ed PO |
122 | |
123 | int model; | |
124 | unsigned long ioport; | |
2c7e5798 | 125 | unsigned int scratch_reg; |
727c26ed PO |
126 | |
127 | const char *helper; | |
128 | const char *firmware; | |
886275ce RR |
129 | bool helper_allocated; |
130 | bool firmware_allocated; | |
727c26ed | 131 | |
557de5eb | 132 | u8 buffer[65536] __attribute__((aligned(4))); |
727c26ed PO |
133 | |
134 | spinlock_t lock; | |
135 | struct if_sdio_packet *packets; | |
9b02f419 DW |
136 | |
137 | struct workqueue_struct *workqueue; | |
727c26ed | 138 | struct work_struct packet_worker; |
b136a141 BZ |
139 | |
140 | u8 rx_unit; | |
727c26ed PO |
141 | }; |
142 | ||
143 | /********************************************************************/ | |
144 | /* I/O */ | |
145 | /********************************************************************/ | |
146 | ||
2c7e5798 BZ |
147 | /* |
148 | * For SD8385/SD8686, this function reads firmware status after | |
149 | * the image is downloaded, or reads RX packet length when | |
150 | * interrupt (with IF_SDIO_H_INT_UPLD bit set) is received. | |
151 | * For SD8688, this function reads firmware status only. | |
152 | */ | |
727c26ed PO |
153 | static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err) |
154 | { | |
2c7e5798 | 155 | int ret; |
727c26ed PO |
156 | u16 scratch; |
157 | ||
2c7e5798 | 158 | scratch = sdio_readb(card->func, card->scratch_reg, &ret); |
727c26ed | 159 | if (!ret) |
2c7e5798 BZ |
160 | scratch |= sdio_readb(card->func, card->scratch_reg + 1, |
161 | &ret) << 8; | |
727c26ed PO |
162 | |
163 | if (err) | |
164 | *err = ret; | |
165 | ||
166 | if (ret) | |
167 | return 0xffff; | |
168 | ||
169 | return scratch; | |
170 | } | |
171 | ||
b136a141 BZ |
172 | static u8 if_sdio_read_rx_unit(struct if_sdio_card *card) |
173 | { | |
174 | int ret; | |
175 | u8 rx_unit; | |
176 | ||
177 | rx_unit = sdio_readb(card->func, IF_SDIO_RX_UNIT, &ret); | |
178 | ||
179 | if (ret) | |
180 | rx_unit = 0; | |
181 | ||
182 | return rx_unit; | |
183 | } | |
184 | ||
185 | static u16 if_sdio_read_rx_len(struct if_sdio_card *card, int *err) | |
186 | { | |
187 | int ret; | |
188 | u16 rx_len; | |
189 | ||
190 | switch (card->model) { | |
3d32a58b DW |
191 | case MODEL_8385: |
192 | case MODEL_8686: | |
b136a141 BZ |
193 | rx_len = if_sdio_read_scratch(card, &ret); |
194 | break; | |
3d32a58b | 195 | case MODEL_8688: |
b136a141 BZ |
196 | default: /* for newer chipsets */ |
197 | rx_len = sdio_readb(card->func, IF_SDIO_RX_LEN, &ret); | |
198 | if (!ret) | |
199 | rx_len <<= card->rx_unit; | |
200 | else | |
201 | rx_len = 0xffff; /* invalid length */ | |
202 | ||
203 | break; | |
204 | } | |
205 | ||
206 | if (err) | |
207 | *err = ret; | |
208 | ||
209 | return rx_len; | |
210 | } | |
211 | ||
727c26ed PO |
212 | static int if_sdio_handle_cmd(struct if_sdio_card *card, |
213 | u8 *buffer, unsigned size) | |
214 | { | |
7919b89c | 215 | struct lbs_private *priv = card->priv; |
727c26ed PO |
216 | int ret; |
217 | unsigned long flags; | |
7919b89c | 218 | u8 i; |
727c26ed PO |
219 | |
220 | lbs_deb_enter(LBS_DEB_SDIO); | |
221 | ||
ddac4526 | 222 | if (size > LBS_CMD_BUFFER_SIZE) { |
727c26ed PO |
223 | lbs_deb_sdio("response packet too large (%d bytes)\n", |
224 | (int)size); | |
225 | ret = -E2BIG; | |
226 | goto out; | |
227 | } | |
228 | ||
7919b89c | 229 | spin_lock_irqsave(&priv->driver_lock, flags); |
727c26ed | 230 | |
7919b89c HS |
231 | i = (priv->resp_idx == 0) ? 1 : 0; |
232 | BUG_ON(priv->resp_len[i]); | |
233 | priv->resp_len[i] = size; | |
234 | memcpy(priv->resp_buf[i], buffer, size); | |
235 | lbs_notify_command_response(priv, i); | |
727c26ed | 236 | |
7919b89c | 237 | spin_unlock_irqrestore(&card->priv->driver_lock, flags); |
727c26ed PO |
238 | |
239 | ret = 0; | |
240 | ||
241 | out: | |
727c26ed | 242 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); |
727c26ed PO |
243 | return ret; |
244 | } | |
245 | ||
246 | static int if_sdio_handle_data(struct if_sdio_card *card, | |
247 | u8 *buffer, unsigned size) | |
248 | { | |
249 | int ret; | |
250 | struct sk_buff *skb; | |
251 | char *data; | |
252 | ||
253 | lbs_deb_enter(LBS_DEB_SDIO); | |
254 | ||
255 | if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) { | |
256 | lbs_deb_sdio("response packet too large (%d bytes)\n", | |
257 | (int)size); | |
258 | ret = -E2BIG; | |
259 | goto out; | |
260 | } | |
261 | ||
51e6b712 | 262 | skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN); |
727c26ed PO |
263 | if (!skb) { |
264 | ret = -ENOMEM; | |
265 | goto out; | |
266 | } | |
267 | ||
51e6b712 PO |
268 | skb_reserve(skb, NET_IP_ALIGN); |
269 | ||
727c26ed PO |
270 | data = skb_put(skb, size); |
271 | ||
272 | memcpy(data, buffer, size); | |
273 | ||
10078321 | 274 | lbs_process_rxed_packet(card->priv, skb); |
727c26ed PO |
275 | |
276 | ret = 0; | |
277 | ||
278 | out: | |
279 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
280 | ||
281 | return ret; | |
282 | } | |
283 | ||
284 | static int if_sdio_handle_event(struct if_sdio_card *card, | |
285 | u8 *buffer, unsigned size) | |
286 | { | |
287 | int ret; | |
727c26ed PO |
288 | u32 event; |
289 | ||
290 | lbs_deb_enter(LBS_DEB_SDIO); | |
291 | ||
3d32a58b | 292 | if (card->model == MODEL_8385) { |
727c26ed PO |
293 | event = sdio_readb(card->func, IF_SDIO_EVENT, &ret); |
294 | if (ret) | |
295 | goto out; | |
f5ac2b9e BZ |
296 | |
297 | /* right shift 3 bits to get the event id */ | |
298 | event >>= 3; | |
727c26ed PO |
299 | } else { |
300 | if (size < 4) { | |
301 | lbs_deb_sdio("event packet too small (%d bytes)\n", | |
302 | (int)size); | |
303 | ret = -EINVAL; | |
304 | goto out; | |
305 | } | |
306 | event = buffer[3] << 24; | |
307 | event |= buffer[2] << 16; | |
308 | event |= buffer[1] << 8; | |
309 | event |= buffer[0] << 0; | |
727c26ed PO |
310 | } |
311 | ||
7919b89c | 312 | lbs_queue_event(card->priv, event & 0xFF); |
727c26ed PO |
313 | ret = 0; |
314 | ||
315 | out: | |
316 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
96021f09 DW |
321 | static int if_sdio_wait_status(struct if_sdio_card *card, const u8 condition) |
322 | { | |
323 | u8 status; | |
324 | unsigned long timeout; | |
325 | int ret = 0; | |
326 | ||
327 | timeout = jiffies + HZ; | |
328 | while (1) { | |
329 | status = sdio_readb(card->func, IF_SDIO_STATUS, &ret); | |
ca962557 DW |
330 | if (ret) |
331 | return ret; | |
332 | if ((status & condition) == condition) | |
96021f09 DW |
333 | break; |
334 | if (time_after(jiffies, timeout)) | |
335 | return -ETIMEDOUT; | |
336 | mdelay(1); | |
337 | } | |
338 | return ret; | |
339 | } | |
340 | ||
727c26ed PO |
341 | static int if_sdio_card_to_host(struct if_sdio_card *card) |
342 | { | |
343 | int ret; | |
727c26ed | 344 | u16 size, type, chunk; |
727c26ed PO |
345 | |
346 | lbs_deb_enter(LBS_DEB_SDIO); | |
347 | ||
b136a141 | 348 | size = if_sdio_read_rx_len(card, &ret); |
727c26ed PO |
349 | if (ret) |
350 | goto out; | |
351 | ||
352 | if (size < 4) { | |
353 | lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n", | |
354 | (int)size); | |
355 | ret = -EINVAL; | |
356 | goto out; | |
357 | } | |
358 | ||
96021f09 DW |
359 | ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY); |
360 | if (ret) | |
361 | goto out; | |
727c26ed PO |
362 | |
363 | /* | |
364 | * The transfer must be in one transaction or the firmware | |
ad3868b2 PO |
365 | * goes suicidal. There's no way to guarantee that for all |
366 | * controllers, but we can at least try. | |
727c26ed | 367 | */ |
ad3868b2 | 368 | chunk = sdio_align_size(card->func, size); |
727c26ed PO |
369 | |
370 | ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk); | |
371 | if (ret) | |
372 | goto out; | |
373 | ||
374 | chunk = card->buffer[0] | (card->buffer[1] << 8); | |
375 | type = card->buffer[2] | (card->buffer[3] << 8); | |
376 | ||
377 | lbs_deb_sdio("packet of type %d and size %d bytes\n", | |
378 | (int)type, (int)chunk); | |
379 | ||
380 | if (chunk > size) { | |
381 | lbs_deb_sdio("packet fragment (%d > %d)\n", | |
382 | (int)chunk, (int)size); | |
383 | ret = -EINVAL; | |
384 | goto out; | |
385 | } | |
386 | ||
387 | if (chunk < size) { | |
388 | lbs_deb_sdio("packet fragment (%d < %d)\n", | |
389 | (int)chunk, (int)size); | |
390 | } | |
391 | ||
392 | switch (type) { | |
393 | case MVMS_CMD: | |
394 | ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4); | |
395 | if (ret) | |
396 | goto out; | |
397 | break; | |
398 | case MVMS_DAT: | |
399 | ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4); | |
400 | if (ret) | |
401 | goto out; | |
402 | break; | |
403 | case MVMS_EVENT: | |
404 | ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4); | |
405 | if (ret) | |
406 | goto out; | |
407 | break; | |
408 | default: | |
409 | lbs_deb_sdio("invalid type (%d) from firmware\n", | |
410 | (int)type); | |
411 | ret = -EINVAL; | |
412 | goto out; | |
413 | } | |
414 | ||
415 | out: | |
416 | if (ret) | |
0e4e06ae | 417 | pr_err("problem fetching packet from firmware\n"); |
727c26ed PO |
418 | |
419 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
420 | ||
421 | return ret; | |
422 | } | |
423 | ||
424 | static void if_sdio_host_to_card_worker(struct work_struct *work) | |
425 | { | |
426 | struct if_sdio_card *card; | |
427 | struct if_sdio_packet *packet; | |
727c26ed PO |
428 | int ret; |
429 | unsigned long flags; | |
430 | ||
431 | lbs_deb_enter(LBS_DEB_SDIO); | |
432 | ||
433 | card = container_of(work, struct if_sdio_card, packet_worker); | |
434 | ||
435 | while (1) { | |
436 | spin_lock_irqsave(&card->lock, flags); | |
437 | packet = card->packets; | |
438 | if (packet) | |
439 | card->packets = packet->next; | |
440 | spin_unlock_irqrestore(&card->lock, flags); | |
441 | ||
442 | if (!packet) | |
443 | break; | |
444 | ||
445 | sdio_claim_host(card->func); | |
446 | ||
96021f09 DW |
447 | ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY); |
448 | if (ret == 0) { | |
449 | ret = sdio_writesb(card->func, card->ioport, | |
450 | packet->buffer, packet->nb); | |
727c26ed PO |
451 | } |
452 | ||
727c26ed | 453 | if (ret) |
0e4e06ae | 454 | pr_err("error %d sending packet to firmware\n", ret); |
96021f09 | 455 | |
727c26ed PO |
456 | sdio_release_host(card->func); |
457 | ||
458 | kfree(packet); | |
459 | } | |
460 | ||
461 | lbs_deb_leave(LBS_DEB_SDIO); | |
462 | } | |
463 | ||
464 | /********************************************************************/ | |
465 | /* Firmware */ | |
466 | /********************************************************************/ | |
467 | ||
96021f09 DW |
468 | #define FW_DL_READY_STATUS (IF_SDIO_IO_RDY | IF_SDIO_DL_RDY) |
469 | ||
3d32a58b DW |
470 | static int if_sdio_prog_helper(struct if_sdio_card *card, |
471 | const struct firmware *fw) | |
727c26ed PO |
472 | { |
473 | int ret; | |
727c26ed PO |
474 | unsigned long timeout; |
475 | u8 *chunk_buffer; | |
476 | u32 chunk_size; | |
6dfff895 | 477 | const u8 *firmware; |
727c26ed PO |
478 | size_t size; |
479 | ||
480 | lbs_deb_enter(LBS_DEB_SDIO); | |
481 | ||
727c26ed PO |
482 | chunk_buffer = kzalloc(64, GFP_KERNEL); |
483 | if (!chunk_buffer) { | |
484 | ret = -ENOMEM; | |
3d32a58b | 485 | goto out; |
727c26ed PO |
486 | } |
487 | ||
488 | sdio_claim_host(card->func); | |
489 | ||
490 | ret = sdio_set_block_size(card->func, 32); | |
491 | if (ret) | |
492 | goto release; | |
493 | ||
494 | firmware = fw->data; | |
495 | size = fw->size; | |
496 | ||
497 | while (size) { | |
96021f09 DW |
498 | ret = if_sdio_wait_status(card, FW_DL_READY_STATUS); |
499 | if (ret) | |
500 | goto release; | |
727c26ed | 501 | |
ac1a474d DW |
502 | /* On some platforms (like Davinci) the chip needs more time |
503 | * between helper blocks. | |
504 | */ | |
505 | mdelay(2); | |
727c26ed PO |
506 | |
507 | chunk_size = min(size, (size_t)60); | |
508 | ||
c2df2efe | 509 | *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size); |
727c26ed PO |
510 | memcpy(chunk_buffer + 4, firmware, chunk_size); |
511 | /* | |
512 | lbs_deb_sdio("sending %d bytes chunk\n", chunk_size); | |
513 | */ | |
514 | ret = sdio_writesb(card->func, card->ioport, | |
515 | chunk_buffer, 64); | |
516 | if (ret) | |
517 | goto release; | |
518 | ||
519 | firmware += chunk_size; | |
520 | size -= chunk_size; | |
521 | } | |
522 | ||
523 | /* an empty block marks the end of the transfer */ | |
524 | memset(chunk_buffer, 0, 4); | |
525 | ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64); | |
526 | if (ret) | |
527 | goto release; | |
528 | ||
529 | lbs_deb_sdio("waiting for helper to boot...\n"); | |
530 | ||
531 | /* wait for the helper to boot by looking at the size register */ | |
532 | timeout = jiffies + HZ; | |
533 | while (1) { | |
534 | u16 req_size; | |
535 | ||
536 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
537 | if (ret) | |
538 | goto release; | |
539 | ||
540 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
541 | if (ret) | |
542 | goto release; | |
543 | ||
544 | if (req_size != 0) | |
545 | break; | |
546 | ||
547 | if (time_after(jiffies, timeout)) { | |
548 | ret = -ETIMEDOUT; | |
549 | goto release; | |
550 | } | |
551 | ||
552 | msleep(10); | |
553 | } | |
554 | ||
555 | ret = 0; | |
556 | ||
557 | release: | |
727c26ed PO |
558 | sdio_release_host(card->func); |
559 | kfree(chunk_buffer); | |
727c26ed PO |
560 | |
561 | out: | |
562 | if (ret) | |
0e4e06ae | 563 | pr_err("failed to load helper firmware\n"); |
727c26ed PO |
564 | |
565 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
727c26ed PO |
566 | return ret; |
567 | } | |
568 | ||
3d32a58b DW |
569 | static int if_sdio_prog_real(struct if_sdio_card *card, |
570 | const struct firmware *fw) | |
727c26ed PO |
571 | { |
572 | int ret; | |
727c26ed PO |
573 | unsigned long timeout; |
574 | u8 *chunk_buffer; | |
575 | u32 chunk_size; | |
6dfff895 | 576 | const u8 *firmware; |
727c26ed PO |
577 | size_t size, req_size; |
578 | ||
579 | lbs_deb_enter(LBS_DEB_SDIO); | |
580 | ||
727c26ed PO |
581 | chunk_buffer = kzalloc(512, GFP_KERNEL); |
582 | if (!chunk_buffer) { | |
583 | ret = -ENOMEM; | |
3d32a58b | 584 | goto out; |
727c26ed PO |
585 | } |
586 | ||
587 | sdio_claim_host(card->func); | |
588 | ||
589 | ret = sdio_set_block_size(card->func, 32); | |
590 | if (ret) | |
591 | goto release; | |
592 | ||
593 | firmware = fw->data; | |
594 | size = fw->size; | |
595 | ||
596 | while (size) { | |
96021f09 DW |
597 | ret = if_sdio_wait_status(card, FW_DL_READY_STATUS); |
598 | if (ret) | |
599 | goto release; | |
727c26ed PO |
600 | |
601 | req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret); | |
602 | if (ret) | |
603 | goto release; | |
604 | ||
605 | req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8; | |
606 | if (ret) | |
607 | goto release; | |
608 | /* | |
609 | lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size); | |
610 | */ | |
611 | if (req_size == 0) { | |
612 | lbs_deb_sdio("firmware helper gave up early\n"); | |
613 | ret = -EIO; | |
614 | goto release; | |
615 | } | |
616 | ||
617 | if (req_size & 0x01) { | |
618 | lbs_deb_sdio("firmware helper signalled error\n"); | |
619 | ret = -EIO; | |
620 | goto release; | |
621 | } | |
622 | ||
623 | if (req_size > size) | |
624 | req_size = size; | |
625 | ||
626 | while (req_size) { | |
627 | chunk_size = min(req_size, (size_t)512); | |
628 | ||
629 | memcpy(chunk_buffer, firmware, chunk_size); | |
630 | /* | |
631 | lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n", | |
632 | chunk_size, (chunk_size + 31) / 32 * 32); | |
633 | */ | |
634 | ret = sdio_writesb(card->func, card->ioport, | |
23827926 | 635 | chunk_buffer, roundup(chunk_size, 32)); |
727c26ed PO |
636 | if (ret) |
637 | goto release; | |
638 | ||
639 | firmware += chunk_size; | |
640 | size -= chunk_size; | |
641 | req_size -= chunk_size; | |
642 | } | |
643 | } | |
644 | ||
645 | ret = 0; | |
646 | ||
647 | lbs_deb_sdio("waiting for firmware to boot...\n"); | |
648 | ||
649 | /* wait for the firmware to boot */ | |
650 | timeout = jiffies + HZ; | |
651 | while (1) { | |
652 | u16 scratch; | |
653 | ||
654 | scratch = if_sdio_read_scratch(card, &ret); | |
655 | if (ret) | |
656 | goto release; | |
657 | ||
658 | if (scratch == IF_SDIO_FIRMWARE_OK) | |
659 | break; | |
660 | ||
661 | if (time_after(jiffies, timeout)) { | |
662 | ret = -ETIMEDOUT; | |
663 | goto release; | |
664 | } | |
665 | ||
666 | msleep(10); | |
667 | } | |
668 | ||
669 | ret = 0; | |
670 | ||
671 | release: | |
727c26ed PO |
672 | sdio_release_host(card->func); |
673 | kfree(chunk_buffer); | |
727c26ed PO |
674 | |
675 | out: | |
676 | if (ret) | |
0e4e06ae | 677 | pr_err("failed to load firmware\n"); |
727c26ed PO |
678 | |
679 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
727c26ed PO |
680 | return ret; |
681 | } | |
682 | ||
683 | static int if_sdio_prog_firmware(struct if_sdio_card *card) | |
684 | { | |
685 | int ret; | |
686 | u16 scratch; | |
3d32a58b DW |
687 | const struct firmware *helper = NULL; |
688 | const struct firmware *mainfw = NULL; | |
727c26ed PO |
689 | |
690 | lbs_deb_enter(LBS_DEB_SDIO); | |
691 | ||
731b2034 PF |
692 | /* |
693 | * Disable interrupts | |
694 | */ | |
695 | sdio_claim_host(card->func); | |
696 | sdio_writeb(card->func, 0x00, IF_SDIO_H_INT_MASK, &ret); | |
697 | sdio_release_host(card->func); | |
698 | ||
727c26ed PO |
699 | sdio_claim_host(card->func); |
700 | scratch = if_sdio_read_scratch(card, &ret); | |
701 | sdio_release_host(card->func); | |
702 | ||
731b2034 PF |
703 | lbs_deb_sdio("firmware status = %#x\n", scratch); |
704 | lbs_deb_sdio("scratch ret = %d\n", ret); | |
705 | ||
727c26ed PO |
706 | if (ret) |
707 | goto out; | |
708 | ||
2c7e5798 | 709 | |
731b2034 PF |
710 | /* |
711 | * The manual clearly describes that FEDC is the right code to use | |
712 | * to detect firmware presence, but for SD8686 it is not that simple. | |
713 | * Scratch is also used to store the RX packet length, so we lose | |
714 | * the FEDC value early on. So we use a non-zero check in order | |
715 | * to validate firmware presence. | |
716 | * Additionally, the SD8686 in the Gumstix always has the high scratch | |
717 | * bit set, even when the firmware is not loaded. So we have to | |
718 | * exclude that from the test. | |
719 | */ | |
727c26ed PO |
720 | if (scratch == IF_SDIO_FIRMWARE_OK) { |
721 | lbs_deb_sdio("firmware already loaded\n"); | |
722 | goto success; | |
731b2034 PF |
723 | } else if ((card->model == MODEL_8686) && (scratch & 0x7fff)) { |
724 | lbs_deb_sdio("firmware may be running\n"); | |
725 | goto success; | |
727c26ed PO |
726 | } |
727 | ||
3d32a58b DW |
728 | ret = lbs_get_firmware(&card->func->dev, lbs_helper_name, lbs_fw_name, |
729 | card->model, &fw_table[0], &helper, &mainfw); | |
730 | if (ret) { | |
0e4e06ae | 731 | pr_err("failed to find firmware (%d)\n", ret); |
3d32a58b DW |
732 | goto out; |
733 | } | |
734 | ||
735 | ret = if_sdio_prog_helper(card, helper); | |
727c26ed PO |
736 | if (ret) |
737 | goto out; | |
738 | ||
731b2034 PF |
739 | lbs_deb_sdio("Helper firmware loaded\n"); |
740 | ||
3d32a58b | 741 | ret = if_sdio_prog_real(card, mainfw); |
727c26ed PO |
742 | if (ret) |
743 | goto out; | |
744 | ||
731b2034 PF |
745 | lbs_deb_sdio("Firmware loaded\n"); |
746 | ||
727c26ed | 747 | success: |
d26285f8 BZ |
748 | sdio_claim_host(card->func); |
749 | sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE); | |
750 | sdio_release_host(card->func); | |
727c26ed PO |
751 | ret = 0; |
752 | ||
753 | out: | |
3d32a58b DW |
754 | if (helper) |
755 | release_firmware(helper); | |
756 | if (mainfw) | |
757 | release_firmware(mainfw); | |
727c26ed | 758 | |
3d32a58b | 759 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); |
727c26ed PO |
760 | return ret; |
761 | } | |
762 | ||
7e1f79a1 DD |
763 | /********************************************************************/ |
764 | /* Power management */ | |
765 | /********************************************************************/ | |
766 | ||
767 | static int if_sdio_power_on(struct if_sdio_card *card) | |
768 | { | |
769 | struct sdio_func *func = card->func; | |
770 | struct lbs_private *priv = card->priv; | |
771 | struct mmc_host *host = func->card->host; | |
772 | int ret; | |
773 | ||
774 | sdio_claim_host(func); | |
775 | ||
776 | ret = sdio_enable_func(func); | |
777 | if (ret) | |
778 | goto release; | |
779 | ||
780 | /* For 1-bit transfers to the 8686 model, we need to enable the | |
781 | * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0 | |
782 | * bit to allow access to non-vendor registers. */ | |
783 | if ((card->model == MODEL_8686) && | |
784 | (host->caps & MMC_CAP_SDIO_IRQ) && | |
785 | (host->ios.bus_width == MMC_BUS_WIDTH_1)) { | |
786 | u8 reg; | |
787 | ||
788 | func->card->quirks |= MMC_QUIRK_LENIENT_FN0; | |
789 | reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret); | |
790 | if (ret) | |
791 | goto disable; | |
792 | ||
793 | reg |= SDIO_BUS_ECSI; | |
794 | sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret); | |
795 | if (ret) | |
796 | goto disable; | |
797 | } | |
798 | ||
799 | card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret); | |
800 | if (ret) | |
801 | goto disable; | |
802 | ||
803 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8; | |
804 | if (ret) | |
805 | goto disable; | |
806 | ||
807 | card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16; | |
808 | if (ret) | |
809 | goto disable; | |
810 | ||
811 | sdio_release_host(func); | |
812 | ret = if_sdio_prog_firmware(card); | |
813 | sdio_claim_host(func); | |
814 | if (ret) | |
815 | goto disable; | |
816 | ||
817 | /* | |
818 | * Get rx_unit if the chip is SD8688 or newer. | |
819 | * SD8385 & SD8686 do not have rx_unit. | |
820 | */ | |
821 | if ((card->model != MODEL_8385) | |
822 | && (card->model != MODEL_8686)) | |
823 | card->rx_unit = if_sdio_read_rx_unit(card); | |
824 | else | |
825 | card->rx_unit = 0; | |
826 | ||
827 | /* | |
828 | * Set up the interrupt handler late. | |
829 | * | |
830 | * If we set it up earlier, the (buggy) hardware generates a spurious | |
831 | * interrupt, even before the interrupt has been enabled, with | |
832 | * CCCR_INTx = 0. | |
833 | * | |
834 | * We register the interrupt handler late so that we can handle any | |
835 | * spurious interrupts, and also to avoid generation of that known | |
836 | * spurious interrupt in the first place. | |
837 | */ | |
838 | ret = sdio_claim_irq(func, if_sdio_interrupt); | |
839 | if (ret) | |
840 | goto disable; | |
841 | ||
842 | /* | |
843 | * Enable interrupts now that everything is set up | |
844 | */ | |
845 | sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret); | |
846 | if (ret) | |
847 | goto release_irq; | |
848 | ||
849 | sdio_release_host(func); | |
850 | ||
851 | /* | |
852 | * FUNC_INIT is required for SD8688 WLAN/BT multiple functions | |
853 | */ | |
854 | if (card->model == MODEL_8688) { | |
855 | struct cmd_header cmd; | |
856 | ||
857 | memset(&cmd, 0, sizeof(cmd)); | |
858 | ||
859 | lbs_deb_sdio("send function INIT command\n"); | |
860 | if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd), | |
861 | lbs_cmd_copyback, (unsigned long) &cmd)) | |
862 | netdev_alert(priv->dev, "CMD_FUNC_INIT cmd failed\n"); | |
863 | } | |
864 | ||
865 | priv->fw_ready = 1; | |
866 | ||
867 | return 0; | |
868 | ||
869 | release_irq: | |
870 | sdio_release_irq(func); | |
871 | disable: | |
872 | sdio_disable_func(func); | |
873 | release: | |
874 | sdio_release_host(func); | |
875 | return ret; | |
876 | } | |
877 | ||
878 | static int if_sdio_power_off(struct if_sdio_card *card) | |
879 | { | |
880 | struct sdio_func *func = card->func; | |
881 | struct lbs_private *priv = card->priv; | |
882 | ||
883 | priv->fw_ready = 0; | |
884 | ||
885 | sdio_claim_host(func); | |
886 | sdio_release_irq(func); | |
887 | sdio_disable_func(func); | |
888 | sdio_release_host(func); | |
889 | return 0; | |
890 | } | |
891 | ||
892 | ||
727c26ed PO |
893 | /*******************************************************************/ |
894 | /* Libertas callbacks */ | |
895 | /*******************************************************************/ | |
896 | ||
69f9032d HS |
897 | static int if_sdio_host_to_card(struct lbs_private *priv, |
898 | u8 type, u8 *buf, u16 nb) | |
727c26ed PO |
899 | { |
900 | int ret; | |
901 | struct if_sdio_card *card; | |
902 | struct if_sdio_packet *packet, *cur; | |
903 | u16 size; | |
904 | unsigned long flags; | |
905 | ||
906 | lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb); | |
907 | ||
908 | card = priv->card; | |
909 | ||
910 | if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) { | |
911 | ret = -EINVAL; | |
912 | goto out; | |
913 | } | |
914 | ||
915 | /* | |
916 | * The transfer must be in one transaction or the firmware | |
ad3868b2 PO |
917 | * goes suicidal. There's no way to guarantee that for all |
918 | * controllers, but we can at least try. | |
727c26ed | 919 | */ |
ad3868b2 | 920 | size = sdio_align_size(card->func, nb + 4); |
727c26ed PO |
921 | |
922 | packet = kzalloc(sizeof(struct if_sdio_packet) + size, | |
923 | GFP_ATOMIC); | |
924 | if (!packet) { | |
925 | ret = -ENOMEM; | |
926 | goto out; | |
927 | } | |
928 | ||
929 | packet->next = NULL; | |
930 | packet->nb = size; | |
931 | ||
932 | /* | |
933 | * SDIO specific header. | |
934 | */ | |
935 | packet->buffer[0] = (nb + 4) & 0xff; | |
936 | packet->buffer[1] = ((nb + 4) >> 8) & 0xff; | |
937 | packet->buffer[2] = type; | |
938 | packet->buffer[3] = 0; | |
939 | ||
940 | memcpy(packet->buffer + 4, buf, nb); | |
941 | ||
942 | spin_lock_irqsave(&card->lock, flags); | |
943 | ||
944 | if (!card->packets) | |
945 | card->packets = packet; | |
946 | else { | |
947 | cur = card->packets; | |
948 | while (cur->next) | |
949 | cur = cur->next; | |
950 | cur->next = packet; | |
951 | } | |
952 | ||
953 | switch (type) { | |
954 | case MVMS_CMD: | |
955 | priv->dnld_sent = DNLD_CMD_SENT; | |
956 | break; | |
957 | case MVMS_DAT: | |
958 | priv->dnld_sent = DNLD_DATA_SENT; | |
959 | break; | |
960 | default: | |
961 | lbs_deb_sdio("unknown packet type %d\n", (int)type); | |
962 | } | |
963 | ||
964 | spin_unlock_irqrestore(&card->lock, flags); | |
965 | ||
9b02f419 | 966 | queue_work(card->workqueue, &card->packet_worker); |
727c26ed PO |
967 | |
968 | ret = 0; | |
969 | ||
970 | out: | |
971 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
972 | ||
973 | return ret; | |
974 | } | |
975 | ||
49125454 AK |
976 | static int if_sdio_enter_deep_sleep(struct lbs_private *priv) |
977 | { | |
978 | int ret = -1; | |
979 | struct cmd_header cmd; | |
980 | ||
981 | memset(&cmd, 0, sizeof(cmd)); | |
982 | ||
983 | lbs_deb_sdio("send DEEP_SLEEP command\n"); | |
984 | ret = __lbs_cmd(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd), | |
985 | lbs_cmd_copyback, (unsigned long) &cmd); | |
986 | if (ret) | |
f3a57fd1 | 987 | netdev_err(priv->dev, "DEEP_SLEEP cmd failed\n"); |
49125454 AK |
988 | |
989 | mdelay(200); | |
990 | return ret; | |
991 | } | |
992 | ||
993 | static int if_sdio_exit_deep_sleep(struct lbs_private *priv) | |
994 | { | |
995 | struct if_sdio_card *card = priv->card; | |
996 | int ret = -1; | |
997 | ||
998 | lbs_deb_enter(LBS_DEB_SDIO); | |
999 | sdio_claim_host(card->func); | |
1000 | ||
1001 | sdio_writeb(card->func, HOST_POWER_UP, CONFIGURATION_REG, &ret); | |
1002 | if (ret) | |
f3a57fd1 | 1003 | netdev_err(priv->dev, "sdio_writeb failed!\n"); |
49125454 AK |
1004 | |
1005 | sdio_release_host(card->func); | |
1006 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | static int if_sdio_reset_deep_sleep_wakeup(struct lbs_private *priv) | |
1011 | { | |
1012 | struct if_sdio_card *card = priv->card; | |
1013 | int ret = -1; | |
1014 | ||
1015 | lbs_deb_enter(LBS_DEB_SDIO); | |
1016 | sdio_claim_host(card->func); | |
1017 | ||
1018 | sdio_writeb(card->func, 0, CONFIGURATION_REG, &ret); | |
1019 | if (ret) | |
f3a57fd1 | 1020 | netdev_err(priv->dev, "sdio_writeb failed!\n"); |
49125454 AK |
1021 | |
1022 | sdio_release_host(card->func); | |
1023 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
1024 | return ret; | |
1025 | ||
1026 | } | |
1027 | ||
9a821f5d DD |
1028 | static struct mmc_host *reset_host; |
1029 | ||
1030 | static void if_sdio_reset_card_worker(struct work_struct *work) | |
1031 | { | |
1032 | /* | |
1033 | * The actual reset operation must be run outside of lbs_thread. This | |
1034 | * is because mmc_remove_host() will cause the device to be instantly | |
1035 | * destroyed, and the libertas driver then needs to end lbs_thread, | |
1036 | * leading to a deadlock. | |
1037 | * | |
1038 | * We run it in a workqueue totally independent from the if_sdio_card | |
1039 | * instance for that reason. | |
1040 | */ | |
1041 | ||
1042 | pr_info("Resetting card..."); | |
1043 | mmc_remove_host(reset_host); | |
1044 | mmc_add_host(reset_host); | |
1045 | } | |
1046 | static DECLARE_WORK(card_reset_work, if_sdio_reset_card_worker); | |
1047 | ||
1048 | static void if_sdio_reset_card(struct lbs_private *priv) | |
1049 | { | |
1050 | struct if_sdio_card *card = priv->card; | |
1051 | ||
1052 | if (work_pending(&card_reset_work)) | |
1053 | return; | |
1054 | ||
1055 | reset_host = card->func->card->host; | |
1056 | schedule_work(&card_reset_work); | |
1057 | } | |
1058 | ||
7e1f79a1 DD |
1059 | static int if_sdio_power_save(struct lbs_private *priv) |
1060 | { | |
1061 | struct if_sdio_card *card = priv->card; | |
1062 | int ret; | |
1063 | ||
1064 | flush_workqueue(card->workqueue); | |
1065 | ||
1066 | ret = if_sdio_power_off(card); | |
1067 | ||
1068 | /* Let runtime PM know the card is powered off */ | |
1069 | pm_runtime_put_sync(&card->func->dev); | |
1070 | ||
1071 | return ret; | |
1072 | } | |
1073 | ||
1074 | static int if_sdio_power_restore(struct lbs_private *priv) | |
1075 | { | |
1076 | struct if_sdio_card *card = priv->card; | |
1077 | ||
1078 | /* Make sure the card will not be powered off by runtime PM */ | |
1079 | pm_runtime_get_sync(&card->func->dev); | |
1080 | ||
1081 | return if_sdio_power_on(card); | |
1082 | } | |
1083 | ||
1084 | ||
727c26ed PO |
1085 | /*******************************************************************/ |
1086 | /* SDIO callbacks */ | |
1087 | /*******************************************************************/ | |
1088 | ||
1089 | static void if_sdio_interrupt(struct sdio_func *func) | |
1090 | { | |
1091 | int ret; | |
1092 | struct if_sdio_card *card; | |
1093 | u8 cause; | |
1094 | ||
1095 | lbs_deb_enter(LBS_DEB_SDIO); | |
1096 | ||
1097 | card = sdio_get_drvdata(func); | |
1098 | ||
1099 | cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret); | |
d2ac49fe | 1100 | if (ret || !cause) |
727c26ed PO |
1101 | goto out; |
1102 | ||
1103 | lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause); | |
1104 | ||
1105 | sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret); | |
1106 | if (ret) | |
1107 | goto out; | |
1108 | ||
1109 | /* | |
1110 | * Ignore the define name, this really means the card has | |
1111 | * successfully received the command. | |
1112 | */ | |
49125454 | 1113 | card->priv->is_activity_detected = 1; |
e775ed7c DW |
1114 | if (cause & IF_SDIO_H_INT_DNLD) |
1115 | lbs_host_to_card_done(card->priv); | |
1116 | ||
727c26ed PO |
1117 | |
1118 | if (cause & IF_SDIO_H_INT_UPLD) { | |
1119 | ret = if_sdio_card_to_host(card); | |
1120 | if (ret) | |
1121 | goto out; | |
1122 | } | |
1123 | ||
1124 | ret = 0; | |
1125 | ||
1126 | out: | |
1127 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
1128 | } | |
1129 | ||
1130 | static int if_sdio_probe(struct sdio_func *func, | |
1131 | const struct sdio_device_id *id) | |
1132 | { | |
1133 | struct if_sdio_card *card; | |
69f9032d | 1134 | struct lbs_private *priv; |
727c26ed PO |
1135 | int ret, i; |
1136 | unsigned int model; | |
1137 | struct if_sdio_packet *packet; | |
1138 | ||
1139 | lbs_deb_enter(LBS_DEB_SDIO); | |
1140 | ||
1141 | for (i = 0;i < func->card->num_info;i++) { | |
1142 | if (sscanf(func->card->info[i], | |
1143 | "802.11 SDIO ID: %x", &model) == 1) | |
1144 | break; | |
1145 | if (sscanf(func->card->info[i], | |
1146 | "ID: %x", &model) == 1) | |
1147 | break; | |
e70a5ac5 | 1148 | if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) { |
3d32a58b | 1149 | model = MODEL_8385; |
e70a5ac5 BZ |
1150 | break; |
1151 | } | |
727c26ed PO |
1152 | } |
1153 | ||
1154 | if (i == func->card->num_info) { | |
0e4e06ae | 1155 | pr_err("unable to identify card model\n"); |
727c26ed PO |
1156 | return -ENODEV; |
1157 | } | |
1158 | ||
1159 | card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL); | |
1160 | if (!card) | |
1161 | return -ENOMEM; | |
1162 | ||
1163 | card->func = func; | |
1164 | card->model = model; | |
2c7e5798 BZ |
1165 | |
1166 | switch (card->model) { | |
3d32a58b | 1167 | case MODEL_8385: |
2c7e5798 BZ |
1168 | card->scratch_reg = IF_SDIO_SCRATCH_OLD; |
1169 | break; | |
3d32a58b | 1170 | case MODEL_8686: |
2c7e5798 BZ |
1171 | card->scratch_reg = IF_SDIO_SCRATCH; |
1172 | break; | |
3d32a58b | 1173 | case MODEL_8688: |
2c7e5798 BZ |
1174 | default: /* for newer chipsets */ |
1175 | card->scratch_reg = IF_SDIO_FW_STATUS; | |
1176 | break; | |
1177 | } | |
1178 | ||
727c26ed | 1179 | spin_lock_init(&card->lock); |
9b02f419 | 1180 | card->workqueue = create_workqueue("libertas_sdio"); |
727c26ed PO |
1181 | INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker); |
1182 | ||
3d32a58b DW |
1183 | /* Check if we support this card */ |
1184 | for (i = 0; i < ARRAY_SIZE(fw_table); i++) { | |
1185 | if (card->model == fw_table[i].model) | |
727c26ed PO |
1186 | break; |
1187 | } | |
3d32a58b | 1188 | if (i == ARRAY_SIZE(fw_table)) { |
0e4e06ae | 1189 | pr_err("unknown card model 0x%x\n", card->model); |
727c26ed PO |
1190 | ret = -ENODEV; |
1191 | goto free; | |
1192 | } | |
1193 | ||
727c26ed PO |
1194 | sdio_set_drvdata(func, card); |
1195 | ||
1196 | lbs_deb_sdio("class = 0x%X, vendor = 0x%X, " | |
1197 | "device = 0x%X, model = 0x%X, ioport = 0x%X\n", | |
1198 | func->class, func->vendor, func->device, | |
1199 | model, (unsigned)card->ioport); | |
1200 | ||
727c26ed | 1201 | |
10078321 | 1202 | priv = lbs_add_card(card, &func->dev); |
727c26ed PO |
1203 | if (!priv) { |
1204 | ret = -ENOMEM; | |
7e1f79a1 | 1205 | goto free; |
727c26ed PO |
1206 | } |
1207 | ||
1208 | card->priv = priv; | |
1209 | ||
1210 | priv->card = card; | |
1211 | priv->hw_host_to_card = if_sdio_host_to_card; | |
49125454 AK |
1212 | priv->enter_deep_sleep = if_sdio_enter_deep_sleep; |
1213 | priv->exit_deep_sleep = if_sdio_exit_deep_sleep; | |
1214 | priv->reset_deep_sleep_wakeup = if_sdio_reset_deep_sleep_wakeup; | |
9a821f5d | 1215 | priv->reset_card = if_sdio_reset_card; |
7e1f79a1 DD |
1216 | priv->power_save = if_sdio_power_save; |
1217 | priv->power_restore = if_sdio_power_restore; | |
727c26ed | 1218 | |
7e1f79a1 | 1219 | ret = if_sdio_power_on(card); |
727c26ed | 1220 | if (ret) |
7e1f79a1 | 1221 | goto err_activate_card; |
d26285f8 | 1222 | |
10078321 | 1223 | ret = lbs_start_card(priv); |
7e1f79a1 | 1224 | if_sdio_power_off(card); |
727c26ed PO |
1225 | if (ret) |
1226 | goto err_activate_card; | |
1227 | ||
7e1f79a1 DD |
1228 | /* Tell PM core that we don't need the card to be powered now */ |
1229 | pm_runtime_put_noidle(&func->dev); | |
1230 | ||
727c26ed PO |
1231 | out: |
1232 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); | |
1233 | ||
1234 | return ret; | |
1235 | ||
1236 | err_activate_card: | |
9b02f419 DW |
1237 | flush_workqueue(card->workqueue); |
1238 | lbs_remove_card(priv); | |
727c26ed | 1239 | free: |
9b02f419 | 1240 | destroy_workqueue(card->workqueue); |
727c26ed PO |
1241 | while (card->packets) { |
1242 | packet = card->packets; | |
1243 | card->packets = card->packets->next; | |
1244 | kfree(packet); | |
1245 | } | |
1246 | ||
886275ce RR |
1247 | if (card->helper_allocated) |
1248 | kfree(card->helper); | |
1249 | if (card->firmware_allocated) | |
1250 | kfree(card->firmware); | |
727c26ed PO |
1251 | kfree(card); |
1252 | ||
1253 | goto out; | |
1254 | } | |
1255 | ||
1256 | static void if_sdio_remove(struct sdio_func *func) | |
1257 | { | |
1258 | struct if_sdio_card *card; | |
1259 | struct if_sdio_packet *packet; | |
1260 | ||
1261 | lbs_deb_enter(LBS_DEB_SDIO); | |
1262 | ||
1263 | card = sdio_get_drvdata(func); | |
1264 | ||
7e1f79a1 DD |
1265 | /* Undo decrement done above in if_sdio_probe */ |
1266 | pm_runtime_get_noresume(&func->dev); | |
1267 | ||
3d32a58b | 1268 | if (user_rmmod && (card->model == MODEL_8688)) { |
6bc61f4d BZ |
1269 | /* |
1270 | * FUNC_SHUTDOWN is required for SD8688 WLAN/BT | |
1271 | * multiple functions | |
1272 | */ | |
1273 | struct cmd_header cmd; | |
1274 | ||
1275 | memset(&cmd, 0, sizeof(cmd)); | |
1276 | ||
1277 | lbs_deb_sdio("send function SHUTDOWN command\n"); | |
1278 | if (__lbs_cmd(card->priv, CMD_FUNC_SHUTDOWN, | |
1279 | &cmd, sizeof(cmd), lbs_cmd_copyback, | |
1280 | (unsigned long) &cmd)) | |
0e4e06ae | 1281 | pr_alert("CMD_FUNC_SHUTDOWN cmd failed\n"); |
6bc61f4d | 1282 | } |
d26285f8 | 1283 | |
727c26ed PO |
1284 | |
1285 | lbs_deb_sdio("call remove card\n"); | |
6bc61f4d | 1286 | lbs_stop_card(card->priv); |
10078321 | 1287 | lbs_remove_card(card->priv); |
727c26ed | 1288 | |
9b02f419 DW |
1289 | flush_workqueue(card->workqueue); |
1290 | destroy_workqueue(card->workqueue); | |
727c26ed | 1291 | |
727c26ed PO |
1292 | while (card->packets) { |
1293 | packet = card->packets; | |
1294 | card->packets = card->packets->next; | |
1295 | kfree(packet); | |
1296 | } | |
1297 | ||
886275ce RR |
1298 | if (card->helper_allocated) |
1299 | kfree(card->helper); | |
1300 | if (card->firmware_allocated) | |
1301 | kfree(card->firmware); | |
727c26ed PO |
1302 | kfree(card); |
1303 | ||
1304 | lbs_deb_leave(LBS_DEB_SDIO); | |
1305 | } | |
1306 | ||
66fceb69 AK |
1307 | static int if_sdio_suspend(struct device *dev) |
1308 | { | |
1309 | struct sdio_func *func = dev_to_sdio_func(dev); | |
1310 | int ret; | |
1311 | struct if_sdio_card *card = sdio_get_drvdata(func); | |
1312 | ||
1313 | mmc_pm_flag_t flags = sdio_get_host_pm_caps(func); | |
1314 | ||
f3a57fd1 JP |
1315 | dev_info(dev, "%s: suspend: PM flags = 0x%x\n", |
1316 | sdio_func_id(func), flags); | |
66fceb69 AK |
1317 | |
1318 | /* If we aren't being asked to wake on anything, we should bail out | |
1319 | * and let the SD stack power down the card. | |
1320 | */ | |
1321 | if (card->priv->wol_criteria == EHS_REMOVE_WAKEUP) { | |
f3a57fd1 | 1322 | dev_info(dev, "Suspend without wake params -- powering down card\n"); |
66fceb69 AK |
1323 | return -ENOSYS; |
1324 | } | |
1325 | ||
1326 | if (!(flags & MMC_PM_KEEP_POWER)) { | |
f3a57fd1 JP |
1327 | dev_err(dev, "%s: cannot remain alive while host is suspended\n", |
1328 | sdio_func_id(func)); | |
66fceb69 AK |
1329 | return -ENOSYS; |
1330 | } | |
1331 | ||
1332 | ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); | |
1333 | if (ret) | |
1334 | return ret; | |
1335 | ||
1336 | ret = lbs_suspend(card->priv); | |
1337 | if (ret) | |
1338 | return ret; | |
1339 | ||
1340 | return sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ); | |
1341 | } | |
1342 | ||
1343 | static int if_sdio_resume(struct device *dev) | |
1344 | { | |
1345 | struct sdio_func *func = dev_to_sdio_func(dev); | |
1346 | struct if_sdio_card *card = sdio_get_drvdata(func); | |
1347 | int ret; | |
1348 | ||
f3a57fd1 | 1349 | dev_info(dev, "%s: resume: we're back\n", sdio_func_id(func)); |
66fceb69 AK |
1350 | |
1351 | ret = lbs_resume(card->priv); | |
1352 | ||
1353 | return ret; | |
1354 | } | |
1355 | ||
1356 | static const struct dev_pm_ops if_sdio_pm_ops = { | |
1357 | .suspend = if_sdio_suspend, | |
1358 | .resume = if_sdio_resume, | |
1359 | }; | |
1360 | ||
727c26ed PO |
1361 | static struct sdio_driver if_sdio_driver = { |
1362 | .name = "libertas_sdio", | |
1363 | .id_table = if_sdio_ids, | |
1364 | .probe = if_sdio_probe, | |
1365 | .remove = if_sdio_remove, | |
66fceb69 AK |
1366 | .drv = { |
1367 | .pm = &if_sdio_pm_ops, | |
1368 | }, | |
727c26ed PO |
1369 | }; |
1370 | ||
1371 | /*******************************************************************/ | |
1372 | /* Module functions */ | |
1373 | /*******************************************************************/ | |
1374 | ||
4fb910fd | 1375 | static int __init if_sdio_init_module(void) |
727c26ed PO |
1376 | { |
1377 | int ret = 0; | |
1378 | ||
1379 | lbs_deb_enter(LBS_DEB_SDIO); | |
1380 | ||
1381 | printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n"); | |
1382 | printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n"); | |
1383 | ||
1384 | ret = sdio_register_driver(&if_sdio_driver); | |
1385 | ||
6bc61f4d BZ |
1386 | /* Clear the flag in case user removes the card. */ |
1387 | user_rmmod = 0; | |
1388 | ||
727c26ed PO |
1389 | lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret); |
1390 | ||
1391 | return ret; | |
1392 | } | |
1393 | ||
4fb910fd | 1394 | static void __exit if_sdio_exit_module(void) |
727c26ed PO |
1395 | { |
1396 | lbs_deb_enter(LBS_DEB_SDIO); | |
1397 | ||
6bc61f4d BZ |
1398 | /* Set the flag as user is removing this module. */ |
1399 | user_rmmod = 1; | |
d26285f8 | 1400 | |
9a821f5d DD |
1401 | cancel_work_sync(&card_reset_work); |
1402 | ||
727c26ed PO |
1403 | sdio_unregister_driver(&if_sdio_driver); |
1404 | ||
1405 | lbs_deb_leave(LBS_DEB_SDIO); | |
1406 | } | |
1407 | ||
1408 | module_init(if_sdio_init_module); | |
1409 | module_exit(if_sdio_exit_module); | |
1410 | ||
1411 | MODULE_DESCRIPTION("Libertas SDIO WLAN Driver"); | |
1412 | MODULE_AUTHOR("Pierre Ossman"); | |
1413 | MODULE_LICENSE("GPL"); |