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ath6kl: Replace spin_lock_irqsave with spin_lock_bh
[deliverable/linux.git] / drivers / net / wireless / ath / ath6kl / sdio.c
CommitLineData
bdcd8170
KV		 1/*
2 * Copyright (c) 2004-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <linux/mmc/card.h>
18#include <linux/mmc/mmc.h>
19#include <linux/mmc/host.h>
20#include <linux/mmc/sdio_func.h>
21#include <linux/mmc/sdio_ids.h>
22#include <linux/mmc/sdio.h>
23#include <linux/mmc/sd.h>
24#include "htc_hif.h"
25#include "hif-ops.h"
26#include "target.h"
27#include "debug.h"
9df337a1 28#include "cfg80211.h"
bdcd8170
KV		 29
30struct ath6kl_sdio {
31 struct sdio_func *func;
32
33 spinlock_t lock;
34
35 /* free list */
36 struct list_head bus_req_freeq;
37
38 /* available bus requests */
39 struct bus_request bus_req[BUS_REQUEST_MAX_NUM];
40
41 struct ath6kl *ar;
42 u8 *dma_buffer;
43
44 /* scatter request list head */
45 struct list_head scat_req;
46
47 spinlock_t scat_lock;
48 bool is_disabled;
49 atomic_t irq_handling;
50 const struct sdio_device_id *id;
51 struct work_struct wr_async_work;
52 struct list_head wr_asyncq;
53 spinlock_t wr_async_lock;
54};
55
56#define CMD53_ARG_READ 0
57#define CMD53_ARG_WRITE 1
58#define CMD53_ARG_BLOCK_BASIS 1
59#define CMD53_ARG_FIXED_ADDRESS 0
60#define CMD53_ARG_INCR_ADDRESS 1
61
62static inline struct ath6kl_sdio *ath6kl_sdio_priv(struct ath6kl *ar)
63{
64 return ar->hif_priv;
65}
66
67/*
68 * Macro to check if DMA buffer is WORD-aligned and DMA-able.
69 * Most host controllers assume the buffer is DMA'able and will
70 * bug-check otherwise (i.e. buffers on the stack). virt_addr_valid
71 * check fails on stack memory.
72 */
73static inline bool buf_needs_bounce(u8 *buf)
74{
75 return ((unsigned long) buf & 0x3) || !virt_addr_valid(buf);
76}
77
78static void ath6kl_sdio_set_mbox_info(struct ath6kl *ar)
79{
80 struct ath6kl_mbox_info *mbox_info = &ar->mbox_info;
81
82 /* EP1 has an extended range */
83 mbox_info->htc_addr = HIF_MBOX_BASE_ADDR;
84 mbox_info->htc_ext_addr = HIF_MBOX0_EXT_BASE_ADDR;
85 mbox_info->htc_ext_sz = HIF_MBOX0_EXT_WIDTH;
86 mbox_info->block_size = HIF_MBOX_BLOCK_SIZE;
87 mbox_info->gmbox_addr = HIF_GMBOX_BASE_ADDR;
88 mbox_info->gmbox_sz = HIF_GMBOX_WIDTH;
89}
90
91static inline void ath6kl_sdio_set_cmd53_arg(u32 *arg, u8 rw, u8 func,
92 u8 mode, u8 opcode, u32 addr,
93 u16 blksz)
94{
95 *arg = (((rw & 1) << 31) |
96 ((func & 0x7) << 28) |
97 ((mode & 1) << 27) |
98 ((opcode & 1) << 26) |
99 ((addr & 0x1FFFF) << 9) |
100 (blksz & 0x1FF));
101}
102
103static inline void ath6kl_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw,
104 unsigned int address,
105 unsigned char val)
106{
107 const u8 func = 0;
108
109 *arg = ((write & 1) << 31) |
110 ((func & 0x7) << 28) |
111 ((raw & 1) << 27) |
112 (1 << 26) |
113 ((address & 0x1FFFF) << 9) |
114 (1 << 8) |
115 (val & 0xFF);
116}
117
118static int ath6kl_sdio_func0_cmd52_wr_byte(struct mmc_card *card,
119 unsigned int address,
120 unsigned char byte)
121{
122 struct mmc_command io_cmd;
123
124 memset(&io_cmd, 0, sizeof(io_cmd));
125 ath6kl_sdio_set_cmd52_arg(&io_cmd.arg, 1, 0, address, byte);
126 io_cmd.opcode = SD_IO_RW_DIRECT;
127 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
128
129 return mmc_wait_for_cmd(card->host, &io_cmd, 0);
130}
131
da220695
VT		 132static int ath6kl_sdio_io(struct sdio_func *func, u32 request, u32 addr,
133 u8 *buf, u32 len)
134{
135 int ret = 0;
136
137 if (request & HIF_WRITE) {
f7325b85 138 /* FIXME: looks like ugly workaround for something */
da220695
VT		 139 if (addr >= HIF_MBOX_BASE_ADDR &&
140 addr <= HIF_MBOX_END_ADDR)
141 addr += (HIF_MBOX_WIDTH - len);
142
f7325b85 143 /* FIXME: this also looks like ugly workaround */
da220695
VT		 144 if (addr == HIF_MBOX0_EXT_BASE_ADDR)
145 addr += HIF_MBOX0_EXT_WIDTH - len;
146
147 if (request & HIF_FIXED_ADDRESS)
148 ret = sdio_writesb(func, addr, buf, len);
149 else
150 ret = sdio_memcpy_toio(func, addr, buf, len);
151 } else {
152 if (request & HIF_FIXED_ADDRESS)
153 ret = sdio_readsb(func, buf, addr, len);
154 else
155 ret = sdio_memcpy_fromio(func, buf, addr, len);
156 }
157
f7325b85
KV		 158 ath6kl_dbg(ATH6KL_DBG_SDIO, "%s addr 0x%x%s buf 0x%p len %d\n",
159 request & HIF_WRITE ? "wr" : "rd", addr,
160 request & HIF_FIXED_ADDRESS ? " (fixed)" : "", buf, len);
161 ath6kl_dbg_dump(ATH6KL_DBG_SDIO_DUMP, NULL, "sdio ", buf, len);
162
da220695
VT		 163 return ret;
164}
165
bdcd8170
KV		 166static struct bus_request *ath6kl_sdio_alloc_busreq(struct ath6kl_sdio *ar_sdio)
167{
168 struct bus_request *bus_req;
bdcd8170 169
151bd30b 170 spin_lock_bh(&ar_sdio->lock);
bdcd8170
KV		 171
172 if (list_empty(&ar_sdio->bus_req_freeq)) {
151bd30b 173 spin_unlock_bh(&ar_sdio->lock);
bdcd8170
KV		 174 return NULL;
175 }
176
177 bus_req = list_first_entry(&ar_sdio->bus_req_freeq,
178 struct bus_request, list);
179 list_del(&bus_req->list);
180
151bd30b 181 spin_unlock_bh(&ar_sdio->lock);
f7325b85
KV		 182 ath6kl_dbg(ATH6KL_DBG_SCATTER, "%s: bus request 0x%p\n",
183 __func__, bus_req);
bdcd8170
KV		 184
185 return bus_req;
186}
187
188static void ath6kl_sdio_free_bus_req(struct ath6kl_sdio *ar_sdio,
189 struct bus_request *bus_req)
190{
f7325b85
KV		 191 ath6kl_dbg(ATH6KL_DBG_SCATTER, "%s: bus request 0x%p\n",
192 __func__, bus_req);
bdcd8170 193
151bd30b 194 spin_lock_bh(&ar_sdio->lock);
bdcd8170 195 list_add_tail(&bus_req->list, &ar_sdio->bus_req_freeq);
151bd30b 196 spin_unlock_bh(&ar_sdio->lock);
bdcd8170
KV		 197}
198
199static void ath6kl_sdio_setup_scat_data(struct hif_scatter_req *scat_req,
bdcd8170
KV		 200 struct mmc_data *data)
201{
202 struct scatterlist *sg;
203 int i;
204
205 data->blksz = HIF_MBOX_BLOCK_SIZE;
206 data->blocks = scat_req->len / HIF_MBOX_BLOCK_SIZE;
207
208 ath6kl_dbg(ATH6KL_DBG_SCATTER,
209 "hif-scatter: (%s) addr: 0x%X, (block len: %d, block count: %d) , (tot:%d,sg:%d)\n",
210 (scat_req->req & HIF_WRITE) ? "WR" : "RD", scat_req->addr,
211 data->blksz, data->blocks, scat_req->len,
212 scat_req->scat_entries);
213
214 data->flags = (scat_req->req & HIF_WRITE) ? MMC_DATA_WRITE :
215 MMC_DATA_READ;
216
217 /* fill SG entries */
d4df7890 218 sg = scat_req->sgentries;
bdcd8170
KV		 219 sg_init_table(sg, scat_req->scat_entries);
220
221 /* assemble SG list */
222 for (i = 0; i < scat_req->scat_entries; i++, sg++) {
bdcd8170
KV		 223 ath6kl_dbg(ATH6KL_DBG_SCATTER, "%d: addr:0x%p, len:%d\n",
224 i, scat_req->scat_list[i].buf,
225 scat_req->scat_list[i].len);
226
227 sg_set_buf(sg, scat_req->scat_list[i].buf,
228 scat_req->scat_list[i].len);
229 }
230
231 /* set scatter-gather table for request */
d4df7890 232 data->sg = scat_req->sgentries;
bdcd8170
KV		 233 data->sg_len = scat_req->scat_entries;
234}
235
236static int ath6kl_sdio_scat_rw(struct ath6kl_sdio *ar_sdio,
237 struct bus_request *req)
238{
239 struct mmc_request mmc_req;
240 struct mmc_command cmd;
241 struct mmc_data data;
242 struct hif_scatter_req *scat_req;
243 u8 opcode, rw;
348a8fbc 244 int status, len;
bdcd8170
KV		 245
246 scat_req = req->scat_req;
247
348a8fbc
VT		 248 if (scat_req->virt_scat) {
249 len = scat_req->len;
250 if (scat_req->req & HIF_BLOCK_BASIS)
251 len = round_down(len, HIF_MBOX_BLOCK_SIZE);
252
253 status = ath6kl_sdio_io(ar_sdio->func, scat_req->req,
254 scat_req->addr, scat_req->virt_dma_buf,
255 len);
256 goto scat_complete;
257 }
258
bdcd8170
KV		 259 memset(&mmc_req, 0, sizeof(struct mmc_request));
260 memset(&cmd, 0, sizeof(struct mmc_command));
261 memset(&data, 0, sizeof(struct mmc_data));
262
d4df7890 263 ath6kl_sdio_setup_scat_data(scat_req, &data);
bdcd8170
KV		 264
265 opcode = (scat_req->req & HIF_FIXED_ADDRESS) ?
266 CMD53_ARG_FIXED_ADDRESS : CMD53_ARG_INCR_ADDRESS;
267
268 rw = (scat_req->req & HIF_WRITE) ? CMD53_ARG_WRITE : CMD53_ARG_READ;
269
270 /* Fixup the address so that the last byte will fall on MBOX EOM */
271 if (scat_req->req & HIF_WRITE) {
272 if (scat_req->addr == HIF_MBOX_BASE_ADDR)
273 scat_req->addr += HIF_MBOX_WIDTH - scat_req->len;
274 else
275 /* Uses extended address range */
276 scat_req->addr += HIF_MBOX0_EXT_WIDTH - scat_req->len;
277 }
278
279 /* set command argument */
280 ath6kl_sdio_set_cmd53_arg(&cmd.arg, rw, ar_sdio->func->num,
281 CMD53_ARG_BLOCK_BASIS, opcode, scat_req->addr,
282 data.blocks);
283
284 cmd.opcode = SD_IO_RW_EXTENDED;
285 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
286
287 mmc_req.cmd = &cmd;
288 mmc_req.data = &data;
289
290 mmc_set_data_timeout(&data, ar_sdio->func->card);
291 /* synchronous call to process request */
292 mmc_wait_for_req(ar_sdio->func->card->host, &mmc_req);
293
294 status = cmd.error ? cmd.error : data.error;
348a8fbc
VT		 295
296scat_complete:
bdcd8170
KV		 297 scat_req->status = status;
298
299 if (scat_req->status)
300 ath6kl_err("Scatter write request failed:%d\n",
301 scat_req->status);
302
303 if (scat_req->req & HIF_ASYNCHRONOUS)
e041c7f9 304 scat_req->complete(ar_sdio->ar->htc_target, scat_req);
bdcd8170
KV		 305
306 return status;
307}
308
3df505ad
VT		 309static int ath6kl_sdio_alloc_prep_scat_req(struct ath6kl_sdio *ar_sdio,
310 int n_scat_entry, int n_scat_req,
311 bool virt_scat)
312{
313 struct hif_scatter_req *s_req;
314 struct bus_request *bus_req;
cfeab10b
VT		 315 int i, scat_req_sz, scat_list_sz, sg_sz, buf_sz;
316 u8 *virt_buf;
3df505ad
VT		 317
318 scat_list_sz = (n_scat_entry - 1) * sizeof(struct hif_scatter_item);
319 scat_req_sz = sizeof(*s_req) + scat_list_sz;
320
321 if (!virt_scat)
322 sg_sz = sizeof(struct scatterlist) * n_scat_entry;
cfeab10b
VT		 323 else
324 buf_sz = 2 * L1_CACHE_BYTES +
325 ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER;
3df505ad
VT		 326
327 for (i = 0; i < n_scat_req; i++) {
328 /* allocate the scatter request */
329 s_req = kzalloc(scat_req_sz, GFP_KERNEL);
330 if (!s_req)
331 return -ENOMEM;
332
cfeab10b
VT		 333 if (virt_scat) {
334 virt_buf = kzalloc(buf_sz, GFP_KERNEL);
335 if (!virt_buf) {
336 kfree(s_req);
337 return -ENOMEM;
338 }
339
340 s_req->virt_dma_buf =
341 (u8 *)L1_CACHE_ALIGN((unsigned long)virt_buf);
342 } else {
3df505ad
VT		 343 /* allocate sglist */
344 s_req->sgentries = kzalloc(sg_sz, GFP_KERNEL);
345
346 if (!s_req->sgentries) {
347 kfree(s_req);
348 return -ENOMEM;
349 }
350 }
351
352 /* allocate a bus request for this scatter request */
353 bus_req = ath6kl_sdio_alloc_busreq(ar_sdio);
354 if (!bus_req) {
355 kfree(s_req->sgentries);
cfeab10b 356 kfree(s_req->virt_dma_buf);
3df505ad
VT		 357 kfree(s_req);
358 return -ENOMEM;
359 }
360
361 /* assign the scatter request to this bus request */
362 bus_req->scat_req = s_req;
363 s_req->busrequest = bus_req;
364
4a005c3e
VT		 365 s_req->virt_scat = virt_scat;
366
3df505ad
VT		 367 /* add it to the scatter pool */
368 hif_scatter_req_add(ar_sdio->ar, s_req);
369 }
370
371 return 0;
372}
373
bdcd8170
KV		 374static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf,
375 u32 len, u32 request)
376{
377 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
378 u8 *tbuf = NULL;
379 int ret;
380 bool bounced = false;
381
382 if (request & HIF_BLOCK_BASIS)
383 len = round_down(len, HIF_MBOX_BLOCK_SIZE);
384
385 if (buf_needs_bounce(buf)) {
386 if (!ar_sdio->dma_buffer)
387 return -ENOMEM;
388 tbuf = ar_sdio->dma_buffer;
389 memcpy(tbuf, buf, len);
390 bounced = true;
391 } else
392 tbuf = buf;
393
394 sdio_claim_host(ar_sdio->func);
da220695
VT		 395 ret = ath6kl_sdio_io(ar_sdio->func, request, addr, tbuf, len);
396 if ((request & HIF_READ) && bounced)
397 memcpy(buf, tbuf, len);
bdcd8170
KV		 398 sdio_release_host(ar_sdio->func);
399
400 return ret;
401}
402
403static void __ath6kl_sdio_write_async(struct ath6kl_sdio *ar_sdio,
404 struct bus_request *req)
405{
406 if (req->scat_req)
407 ath6kl_sdio_scat_rw(ar_sdio, req);
408 else {
409 void *context;
410 int status;
411
412 status = ath6kl_sdio_read_write_sync(ar_sdio->ar, req->address,
413 req->buffer, req->length,
414 req->request);
415 context = req->packet;
416 ath6kl_sdio_free_bus_req(ar_sdio, req);
417 ath6kldev_rw_comp_handler(context, status);
418 }
419}
420
421static void ath6kl_sdio_write_async_work(struct work_struct *work)
422{
423 struct ath6kl_sdio *ar_sdio;
bdcd8170
KV		 424 struct bus_request *req, *tmp_req;
425
426 ar_sdio = container_of(work, struct ath6kl_sdio, wr_async_work);
427 sdio_claim_host(ar_sdio->func);
428
151bd30b 429 spin_lock_bh(&ar_sdio->wr_async_lock);
bdcd8170
KV		 430 list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) {
431 list_del(&req->list);
151bd30b 432 spin_unlock_bh(&ar_sdio->wr_async_lock);
bdcd8170 433 __ath6kl_sdio_write_async(ar_sdio, req);
151bd30b 434 spin_lock_bh(&ar_sdio->wr_async_lock);
bdcd8170 435 }
151bd30b 436 spin_unlock_bh(&ar_sdio->wr_async_lock);
bdcd8170
KV		 437
438 sdio_release_host(ar_sdio->func);
439}
440
441static void ath6kl_sdio_irq_handler(struct sdio_func *func)
442{
443 int status;
444 struct ath6kl_sdio *ar_sdio;
445
f7325b85
KV		 446 ath6kl_dbg(ATH6KL_DBG_SDIO, "irq\n");
447
bdcd8170
KV		 448 ar_sdio = sdio_get_drvdata(func);
449 atomic_set(&ar_sdio->irq_handling, 1);
450
451 /*
452 * Release the host during interrups so we can pick it back up when
453 * we process commands.
454 */
455 sdio_release_host(ar_sdio->func);
456
457 status = ath6kldev_intr_bh_handler(ar_sdio->ar);
458 sdio_claim_host(ar_sdio->func);
459 atomic_set(&ar_sdio->irq_handling, 0);
460 WARN_ON(status && status != -ECANCELED);
461}
462
463static int ath6kl_sdio_power_on(struct ath6kl_sdio *ar_sdio)
464{
465 struct sdio_func *func = ar_sdio->func;
466 int ret = 0;
467
468 if (!ar_sdio->is_disabled)
469 return 0;
470
471 sdio_claim_host(func);
472
473 ret = sdio_enable_func(func);
474 if (ret) {
475 ath6kl_err("Unable to enable sdio func: %d)\n", ret);
476 sdio_release_host(func);
477 return ret;
478 }
479
480 sdio_release_host(func);
481
482 /*
483 * Wait for hardware to initialise. It should take a lot less than
484 * 10 ms but let's be conservative here.
485 */
486 msleep(10);
487
488 ar_sdio->is_disabled = false;
489
490 return ret;
491}
492
493static int ath6kl_sdio_power_off(struct ath6kl_sdio *ar_sdio)
494{
495 int ret;
496
497 if (ar_sdio->is_disabled)
498 return 0;
499
500 /* Disable the card */
501 sdio_claim_host(ar_sdio->func);
502 ret = sdio_disable_func(ar_sdio->func);
503 sdio_release_host(ar_sdio->func);
504
505 if (ret)
506 return ret;
507
508 ar_sdio->is_disabled = true;
509
510 return ret;
511}
512
513static int ath6kl_sdio_write_async(struct ath6kl *ar, u32 address, u8 *buffer,
514 u32 length, u32 request,
515 struct htc_packet *packet)
516{
517 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
518 struct bus_request *bus_req;
bdcd8170
KV		 519
520 bus_req = ath6kl_sdio_alloc_busreq(ar_sdio);
521
522 if (!bus_req)
523 return -ENOMEM;
524
525 bus_req->address = address;
526 bus_req->buffer = buffer;
527 bus_req->length = length;
528 bus_req->request = request;
529 bus_req->packet = packet;
530
151bd30b 531 spin_lock_bh(&ar_sdio->wr_async_lock);
bdcd8170 532 list_add_tail(&bus_req->list, &ar_sdio->wr_asyncq);
151bd30b 533 spin_unlock_bh(&ar_sdio->wr_async_lock);
bdcd8170
KV		 534 queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work);
535
536 return 0;
537}
538
539static void ath6kl_sdio_irq_enable(struct ath6kl *ar)
540{
541 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
542 int ret;
543
544 sdio_claim_host(ar_sdio->func);
545
546 /* Register the isr */
547 ret = sdio_claim_irq(ar_sdio->func, ath6kl_sdio_irq_handler);
548 if (ret)
549 ath6kl_err("Failed to claim sdio irq: %d\n", ret);
550
551 sdio_release_host(ar_sdio->func);
552}
553
554static void ath6kl_sdio_irq_disable(struct ath6kl *ar)
555{
556 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
557 int ret;
558
559 sdio_claim_host(ar_sdio->func);
560
561 /* Mask our function IRQ */
562 while (atomic_read(&ar_sdio->irq_handling)) {
563 sdio_release_host(ar_sdio->func);
564 schedule_timeout(HZ / 10);
565 sdio_claim_host(ar_sdio->func);
566 }
567
568 ret = sdio_release_irq(ar_sdio->func);
569 if (ret)
570 ath6kl_err("Failed to release sdio irq: %d\n", ret);
571
572 sdio_release_host(ar_sdio->func);
573}
574
575static struct hif_scatter_req *ath6kl_sdio_scatter_req_get(struct ath6kl *ar)
576{
577 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
578 struct hif_scatter_req *node = NULL;
bdcd8170 579
151bd30b 580 spin_lock_bh(&ar_sdio->scat_lock);
bdcd8170
KV		 581
582 if (!list_empty(&ar_sdio->scat_req)) {
583 node = list_first_entry(&ar_sdio->scat_req,
584 struct hif_scatter_req, list);
585 list_del(&node->list);
586 }
587
151bd30b 588 spin_unlock_bh(&ar_sdio->scat_lock);
bdcd8170
KV		 589
590 return node;
591}
592
593static void ath6kl_sdio_scatter_req_add(struct ath6kl *ar,
594 struct hif_scatter_req *s_req)
595{
596 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
bdcd8170 597
151bd30b 598 spin_lock_bh(&ar_sdio->scat_lock);
bdcd8170
KV		 599
600 list_add_tail(&s_req->list, &ar_sdio->scat_req);
601
151bd30b 602 spin_unlock_bh(&ar_sdio->scat_lock);
bdcd8170
KV		 603
604}
605
c630d18a
VT		 606/* scatter gather read write request */
607static int ath6kl_sdio_async_rw_scatter(struct ath6kl *ar,
608 struct hif_scatter_req *scat_req)
609{
610 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
c630d18a
VT		 611 u32 request = scat_req->req;
612 int status = 0;
c630d18a
VT		 613
614 if (!scat_req->len)
615 return -EINVAL;
616
617 ath6kl_dbg(ATH6KL_DBG_SCATTER,
618 "hif-scatter: total len: %d scatter entries: %d\n",
619 scat_req->len, scat_req->scat_entries);
620
621 if (request & HIF_SYNCHRONOUS) {
622 sdio_claim_host(ar_sdio->func);
d4df7890 623 status = ath6kl_sdio_scat_rw(ar_sdio, scat_req->busrequest);
c630d18a
VT		 624 sdio_release_host(ar_sdio->func);
625 } else {
151bd30b 626 spin_lock_bh(&ar_sdio->wr_async_lock);
d4df7890 627 list_add_tail(&scat_req->busrequest->list, &ar_sdio->wr_asyncq);
151bd30b 628 spin_unlock_bh(&ar_sdio->wr_async_lock);
c630d18a
VT		 629 queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work);
630 }
631
632 return status;
633}
634
18a0f93e
VT		 635/* clean up scatter support */
636static void ath6kl_sdio_cleanup_scatter(struct ath6kl *ar)
637{
638 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
639 struct hif_scatter_req *s_req, *tmp_req;
18a0f93e
VT		 640
641 /* empty the free list */
151bd30b 642 spin_lock_bh(&ar_sdio->scat_lock);
18a0f93e
VT		 643 list_for_each_entry_safe(s_req, tmp_req, &ar_sdio->scat_req, list) {
644 list_del(&s_req->list);
151bd30b 645 spin_unlock_bh(&ar_sdio->scat_lock);
18a0f93e
VT		 646
647 if (s_req->busrequest)
648 ath6kl_sdio_free_bus_req(ar_sdio, s_req->busrequest);
649 kfree(s_req->virt_dma_buf);
650 kfree(s_req->sgentries);
651 kfree(s_req);
652
151bd30b 653 spin_lock_bh(&ar_sdio->scat_lock);
18a0f93e 654 }
151bd30b 655 spin_unlock_bh(&ar_sdio->scat_lock);
18a0f93e
VT		 656}
657
658/* setup of HIF scatter resources */
50745af7 659static int ath6kl_sdio_enable_scatter(struct ath6kl *ar)
18a0f93e
VT		 660{
661 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
50745af7 662 struct htc_target *target = ar->htc_target;
cfeab10b
VT		 663 int ret;
664 bool virt_scat = false;
18a0f93e
VT		 665
666 /* check if host supports scatter and it meets our requirements */
667 if (ar_sdio->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) {
cfeab10b 668 ath6kl_err("host only supports scatter of :%d entries, need: %d\n",
18a0f93e
VT		 669 ar_sdio->func->card->host->max_segs,
670 MAX_SCATTER_ENTRIES_PER_REQ);
cfeab10b 671 virt_scat = true;
18a0f93e
VT		 672 }
673
cfeab10b
VT		 674 if (!virt_scat) {
675 ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio,
676 MAX_SCATTER_ENTRIES_PER_REQ,
677 MAX_SCATTER_REQUESTS, virt_scat);
678
679 if (!ret) {
f7325b85 680 ath6kl_dbg(ATH6KL_DBG_SCATTER,
cfeab10b
VT		 681 "hif-scatter enabled: max scatter req : %d entries: %d\n",
682 MAX_SCATTER_REQUESTS,
683 MAX_SCATTER_ENTRIES_PER_REQ);
684
50745af7
VT		 685 target->max_scat_entries = MAX_SCATTER_ENTRIES_PER_REQ;
686 target->max_xfer_szper_scatreq =
cfeab10b
VT		 687 MAX_SCATTER_REQ_TRANSFER_SIZE;
688 } else {
689 ath6kl_sdio_cleanup_scatter(ar);
690 ath6kl_warn("hif scatter resource setup failed, trying virtual scatter method\n");
691 }
692 }
18a0f93e 693
cfeab10b
VT		 694 if (virt_scat || ret) {
695 ret = ath6kl_sdio_alloc_prep_scat_req(ar_sdio,
696 ATH6KL_SCATTER_ENTRIES_PER_REQ,
697 ATH6KL_SCATTER_REQS, virt_scat);
698
699 if (ret) {
700 ath6kl_err("failed to alloc virtual scatter resources !\n");
701 ath6kl_sdio_cleanup_scatter(ar);
702 return ret;
703 }
704
f7325b85 705 ath6kl_dbg(ATH6KL_DBG_SCATTER,
cfeab10b
VT		 706 "Vitual scatter enabled, max_scat_req:%d, entries:%d\n",
707 ATH6KL_SCATTER_REQS, ATH6KL_SCATTER_ENTRIES_PER_REQ);
708
50745af7
VT		 709 target->max_scat_entries = ATH6KL_SCATTER_ENTRIES_PER_REQ;
710 target->max_xfer_szper_scatreq =
cfeab10b 711 ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER;
18a0f93e
VT		 712 }
713
18a0f93e
VT		 714 return 0;
715}
716
abcb344b
KV		 717static int ath6kl_sdio_suspend(struct ath6kl *ar)
718{
719 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
720 struct sdio_func *func = ar_sdio->func;
721 mmc_pm_flag_t flags;
722 int ret;
723
724 flags = sdio_get_host_pm_caps(func);
725
726 if (!(flags & MMC_PM_KEEP_POWER))
727 /* as host doesn't support keep power we need to bail out */
f7325b85
KV		 728 ath6kl_dbg(ATH6KL_DBG_SDIO,
729 "func %d doesn't support MMC_PM_KEEP_POWER\n",
730 func->num);
abcb344b
KV		 731 return -EINVAL;
732
733 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
734 if (ret) {
735 printk(KERN_ERR "ath6kl: set sdio pm flags failed: %d\n",
736 ret);
737 return ret;
738 }
739
740 ath6kl_deep_sleep_enable(ar);
741
742 return 0;
743}
744
bdcd8170
KV		 745static const struct ath6kl_hif_ops ath6kl_sdio_ops = {
746 .read_write_sync = ath6kl_sdio_read_write_sync,
747 .write_async = ath6kl_sdio_write_async,
748 .irq_enable = ath6kl_sdio_irq_enable,
749 .irq_disable = ath6kl_sdio_irq_disable,
750 .scatter_req_get = ath6kl_sdio_scatter_req_get,
751 .scatter_req_add = ath6kl_sdio_scatter_req_add,
752 .enable_scatter = ath6kl_sdio_enable_scatter,
f74a7361 753 .scat_req_rw = ath6kl_sdio_async_rw_scatter,
bdcd8170 754 .cleanup_scatter = ath6kl_sdio_cleanup_scatter,
abcb344b 755 .suspend = ath6kl_sdio_suspend,
bdcd8170
KV		 756};
757
758static int ath6kl_sdio_probe(struct sdio_func *func,
759 const struct sdio_device_id *id)
760{
761 int ret;
762 struct ath6kl_sdio *ar_sdio;
763 struct ath6kl *ar;
764 int count;
765
f7325b85
KV		 766 ath6kl_dbg(ATH6KL_DBG_SDIO,
767 "new func %d vendor 0x%x device 0x%x block 0x%x/0x%x\n",
768 func->num, func->vendor, func->device,
769 func->max_blksize, func->cur_blksize);
bdcd8170
KV		 770
771 ar_sdio = kzalloc(sizeof(struct ath6kl_sdio), GFP_KERNEL);
772 if (!ar_sdio)
773 return -ENOMEM;
774
775 ar_sdio->dma_buffer = kzalloc(HIF_DMA_BUFFER_SIZE, GFP_KERNEL);
776 if (!ar_sdio->dma_buffer) {
777 ret = -ENOMEM;
778 goto err_hif;
779 }
780
781 ar_sdio->func = func;
782 sdio_set_drvdata(func, ar_sdio);
783
784 ar_sdio->id = id;
785 ar_sdio->is_disabled = true;
786
787 spin_lock_init(&ar_sdio->lock);
788 spin_lock_init(&ar_sdio->scat_lock);
789 spin_lock_init(&ar_sdio->wr_async_lock);
790
791 INIT_LIST_HEAD(&ar_sdio->scat_req);
792 INIT_LIST_HEAD(&ar_sdio->bus_req_freeq);
793 INIT_LIST_HEAD(&ar_sdio->wr_asyncq);
794
795 INIT_WORK(&ar_sdio->wr_async_work, ath6kl_sdio_write_async_work);
796
797 for (count = 0; count < BUS_REQUEST_MAX_NUM; count++)
798 ath6kl_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[count]);
799
800 ar = ath6kl_core_alloc(&ar_sdio->func->dev);
801 if (!ar) {
802 ath6kl_err("Failed to alloc ath6kl core\n");
803 ret = -ENOMEM;
804 goto err_dma;
805 }
806
807 ar_sdio->ar = ar;
808 ar->hif_priv = ar_sdio;
809 ar->hif_ops = &ath6kl_sdio_ops;
810
811 ath6kl_sdio_set_mbox_info(ar);
812
813 sdio_claim_host(func);
814
815 if ((ar_sdio->id->device & MANUFACTURER_ID_ATH6KL_BASE_MASK) >=
816 MANUFACTURER_ID_AR6003_BASE) {
817 /* enable 4-bit ASYNC interrupt on AR6003 or later */
818 ret = ath6kl_sdio_func0_cmd52_wr_byte(func->card,
819 CCCR_SDIO_IRQ_MODE_REG,
820 SDIO_IRQ_MODE_ASYNC_4BIT_IRQ);
821 if (ret) {
822 ath6kl_err("Failed to enable 4-bit async irq mode %d\n",
823 ret);
824 sdio_release_host(func);
9df337a1 825 goto err_cfg80211;
bdcd8170
KV		 826 }
827
f7325b85 828 ath6kl_dbg(ATH6KL_DBG_SDIO, "4-bit async irq mode enabled\n");
bdcd8170
KV		 829 }
830
831 /* give us some time to enable, in ms */
832 func->enable_timeout = 100;
833
834 sdio_release_host(func);
835
836 ret = ath6kl_sdio_power_on(ar_sdio);
837 if (ret)
9df337a1 838 goto err_cfg80211;
bdcd8170
KV		 839
840 sdio_claim_host(func);
841
842 ret = sdio_set_block_size(func, HIF_MBOX_BLOCK_SIZE);
843 if (ret) {
844 ath6kl_err("Set sdio block size %d failed: %d)\n",
845 HIF_MBOX_BLOCK_SIZE, ret);
846 sdio_release_host(func);
847 goto err_off;
848 }
849
850 sdio_release_host(func);
851
852 ret = ath6kl_core_init(ar);
853 if (ret) {
854 ath6kl_err("Failed to init ath6kl core\n");
855 goto err_off;
856 }
857
858 return ret;
859
860err_off:
861 ath6kl_sdio_power_off(ar_sdio);
9df337a1
VN		 862err_cfg80211:
863 ath6kl_cfg80211_deinit(ar_sdio->ar);
bdcd8170
KV		 864err_dma:
865 kfree(ar_sdio->dma_buffer);
866err_hif:
867 kfree(ar_sdio);
868
869 return ret;
870}
871
872static void ath6kl_sdio_remove(struct sdio_func *func)
873{
874 struct ath6kl_sdio *ar_sdio;
875
f7325b85
KV		 876 ath6kl_dbg(ATH6KL_DBG_SDIO,
877 "removed func %d vendor 0x%x device 0x%x\n",
878 func->num, func->vendor, func->device);
879
bdcd8170
KV		 880 ar_sdio = sdio_get_drvdata(func);
881
882 ath6kl_stop_txrx(ar_sdio->ar);
883 cancel_work_sync(&ar_sdio->wr_async_work);
884
885 ath6kl_unavail_ev(ar_sdio->ar);
886
887 ath6kl_sdio_power_off(ar_sdio);
888
889 kfree(ar_sdio->dma_buffer);
890 kfree(ar_sdio);
891}
892
893static const struct sdio_device_id ath6kl_sdio_devices[] = {
894 {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x0))},
895 {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x1))},
896 {},
897};
898
899MODULE_DEVICE_TABLE(sdio, ath6kl_sdio_devices);
900
901static struct sdio_driver ath6kl_sdio_driver = {
902 .name = "ath6kl_sdio",
903 .id_table = ath6kl_sdio_devices,
904 .probe = ath6kl_sdio_probe,
905 .remove = ath6kl_sdio_remove,
906};
907
908static int __init ath6kl_sdio_init(void)
909{
910 int ret;
911
912 ret = sdio_register_driver(&ath6kl_sdio_driver);
913 if (ret)
914 ath6kl_err("sdio driver registration failed: %d\n", ret);
915
916 return ret;
917}
918
919static void __exit ath6kl_sdio_exit(void)
920{
921 sdio_unregister_driver(&ath6kl_sdio_driver);
922}
923
924module_init(ath6kl_sdio_init);
925module_exit(ath6kl_sdio_exit);
926
927MODULE_AUTHOR("Atheros Communications, Inc.");
928MODULE_DESCRIPTION("Driver support for Atheros AR600x SDIO devices");
929MODULE_LICENSE("Dual BSD/GPL");
930
931MODULE_FIRMWARE(AR6003_REV2_OTP_FILE);
932MODULE_FIRMWARE(AR6003_REV2_FIRMWARE_FILE);
933MODULE_FIRMWARE(AR6003_REV2_PATCH_FILE);
934MODULE_FIRMWARE(AR6003_REV2_BOARD_DATA_FILE);
935MODULE_FIRMWARE(AR6003_REV2_DEFAULT_BOARD_DATA_FILE);
936MODULE_FIRMWARE(AR6003_REV3_OTP_FILE);
937MODULE_FIRMWARE(AR6003_REV3_FIRMWARE_FILE);
938MODULE_FIRMWARE(AR6003_REV3_PATCH_FILE);
939MODULE_FIRMWARE(AR6003_REV3_BOARD_DATA_FILE);
940MODULE_FIRMWARE(AR6003_REV3_DEFAULT_BOARD_DATA_FILE);
Linux kernel - Deliverables
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