aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath6kl/sdio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/ath/ath6kl/sdio.c')
-rw-r--r--drivers/net/wireless/ath/ath6kl/sdio.c853
1 files changed, 853 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c
new file mode 100644
index 000000000000..b38732aaf41a
--- /dev/null
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -0,0 +1,853 @@
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"
28
29struct ath6kl_sdio {
30 struct sdio_func *func;
31
32 spinlock_t lock;
33
34 /* free list */
35 struct list_head bus_req_freeq;
36
37 /* available bus requests */
38 struct bus_request bus_req[BUS_REQUEST_MAX_NUM];
39
40 struct ath6kl *ar;
41 u8 *dma_buffer;
42
43 /* scatter request list head */
44 struct list_head scat_req;
45
46 spinlock_t scat_lock;
47 bool is_disabled;
48 atomic_t irq_handling;
49 const struct sdio_device_id *id;
50 struct work_struct wr_async_work;
51 struct list_head wr_asyncq;
52 spinlock_t wr_async_lock;
53};
54
55#define CMD53_ARG_READ 0
56#define CMD53_ARG_WRITE 1
57#define CMD53_ARG_BLOCK_BASIS 1
58#define CMD53_ARG_FIXED_ADDRESS 0
59#define CMD53_ARG_INCR_ADDRESS 1
60
61static inline struct ath6kl_sdio *ath6kl_sdio_priv(struct ath6kl *ar)
62{
63 return ar->hif_priv;
64}
65
66/*
67 * Macro to check if DMA buffer is WORD-aligned and DMA-able.
68 * Most host controllers assume the buffer is DMA'able and will
69 * bug-check otherwise (i.e. buffers on the stack). virt_addr_valid
70 * check fails on stack memory.
71 */
72static inline bool buf_needs_bounce(u8 *buf)
73{
74 return ((unsigned long) buf & 0x3) || !virt_addr_valid(buf);
75}
76
77static void ath6kl_sdio_set_mbox_info(struct ath6kl *ar)
78{
79 struct ath6kl_mbox_info *mbox_info = &ar->mbox_info;
80
81 /* EP1 has an extended range */
82 mbox_info->htc_addr = HIF_MBOX_BASE_ADDR;
83 mbox_info->htc_ext_addr = HIF_MBOX0_EXT_BASE_ADDR;
84 mbox_info->htc_ext_sz = HIF_MBOX0_EXT_WIDTH;
85 mbox_info->block_size = HIF_MBOX_BLOCK_SIZE;
86 mbox_info->gmbox_addr = HIF_GMBOX_BASE_ADDR;
87 mbox_info->gmbox_sz = HIF_GMBOX_WIDTH;
88}
89
90static inline void ath6kl_sdio_set_cmd53_arg(u32 *arg, u8 rw, u8 func,
91 u8 mode, u8 opcode, u32 addr,
92 u16 blksz)
93{
94 *arg = (((rw & 1) << 31) |
95 ((func & 0x7) << 28) |
96 ((mode & 1) << 27) |
97 ((opcode & 1) << 26) |
98 ((addr & 0x1FFFF) << 9) |
99 (blksz & 0x1FF));
100}
101
102static inline void ath6kl_sdio_set_cmd52_arg(u32 *arg, u8 write, u8 raw,
103 unsigned int address,
104 unsigned char val)
105{
106 const u8 func = 0;
107
108 *arg = ((write & 1) << 31) |
109 ((func & 0x7) << 28) |
110 ((raw & 1) << 27) |
111 (1 << 26) |
112 ((address & 0x1FFFF) << 9) |
113 (1 << 8) |
114 (val & 0xFF);
115}
116
117static int ath6kl_sdio_func0_cmd52_wr_byte(struct mmc_card *card,
118 unsigned int address,
119 unsigned char byte)
120{
121 struct mmc_command io_cmd;
122
123 memset(&io_cmd, 0, sizeof(io_cmd));
124 ath6kl_sdio_set_cmd52_arg(&io_cmd.arg, 1, 0, address, byte);
125 io_cmd.opcode = SD_IO_RW_DIRECT;
126 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
127
128 return mmc_wait_for_cmd(card->host, &io_cmd, 0);
129}
130
131static struct bus_request *ath6kl_sdio_alloc_busreq(struct ath6kl_sdio *ar_sdio)
132{
133 struct bus_request *bus_req;
134 unsigned long flag;
135
136 spin_lock_irqsave(&ar_sdio->lock, flag);
137
138 if (list_empty(&ar_sdio->bus_req_freeq)) {
139 spin_unlock_irqrestore(&ar_sdio->lock, flag);
140 return NULL;
141 }
142
143 bus_req = list_first_entry(&ar_sdio->bus_req_freeq,
144 struct bus_request, list);
145 list_del(&bus_req->list);
146
147 spin_unlock_irqrestore(&ar_sdio->lock, flag);
148 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: bus request 0x%p\n", __func__, bus_req);
149
150 return bus_req;
151}
152
153static void ath6kl_sdio_free_bus_req(struct ath6kl_sdio *ar_sdio,
154 struct bus_request *bus_req)
155{
156 unsigned long flag;
157
158 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: bus request 0x%p\n", __func__, bus_req);
159
160 spin_lock_irqsave(&ar_sdio->lock, flag);
161 list_add_tail(&bus_req->list, &ar_sdio->bus_req_freeq);
162 spin_unlock_irqrestore(&ar_sdio->lock, flag);
163}
164
165static void ath6kl_sdio_setup_scat_data(struct hif_scatter_req *scat_req,
166 struct hif_scatter_req_priv *s_req_priv,
167 struct mmc_data *data)
168{
169 struct scatterlist *sg;
170 int i;
171
172 data->blksz = HIF_MBOX_BLOCK_SIZE;
173 data->blocks = scat_req->len / HIF_MBOX_BLOCK_SIZE;
174
175 ath6kl_dbg(ATH6KL_DBG_SCATTER,
176 "hif-scatter: (%s) addr: 0x%X, (block len: %d, block count: %d) , (tot:%d,sg:%d)\n",
177 (scat_req->req & HIF_WRITE) ? "WR" : "RD", scat_req->addr,
178 data->blksz, data->blocks, scat_req->len,
179 scat_req->scat_entries);
180
181 data->flags = (scat_req->req & HIF_WRITE) ? MMC_DATA_WRITE :
182 MMC_DATA_READ;
183
184 /* fill SG entries */
185 sg = s_req_priv->sgentries;
186 sg_init_table(sg, scat_req->scat_entries);
187
188 /* assemble SG list */
189 for (i = 0; i < scat_req->scat_entries; i++, sg++) {
190 if ((unsigned long)scat_req->scat_list[i].buf & 0x3)
191 /*
192 * Some scatter engines can handle unaligned
193 * buffers, print this as informational only.
194 */
195 ath6kl_dbg(ATH6KL_DBG_SCATTER,
196 "(%s) scatter buffer is unaligned 0x%p\n",
197 scat_req->req & HIF_WRITE ? "WR" : "RD",
198 scat_req->scat_list[i].buf);
199
200 ath6kl_dbg(ATH6KL_DBG_SCATTER, "%d: addr:0x%p, len:%d\n",
201 i, scat_req->scat_list[i].buf,
202 scat_req->scat_list[i].len);
203
204 sg_set_buf(sg, scat_req->scat_list[i].buf,
205 scat_req->scat_list[i].len);
206 }
207
208 /* set scatter-gather table for request */
209 data->sg = s_req_priv->sgentries;
210 data->sg_len = scat_req->scat_entries;
211}
212
213static int ath6kl_sdio_scat_rw(struct ath6kl_sdio *ar_sdio,
214 struct bus_request *req)
215{
216 struct mmc_request mmc_req;
217 struct mmc_command cmd;
218 struct mmc_data data;
219 struct hif_scatter_req *scat_req;
220 u8 opcode, rw;
221 int status;
222
223 scat_req = req->scat_req;
224
225 memset(&mmc_req, 0, sizeof(struct mmc_request));
226 memset(&cmd, 0, sizeof(struct mmc_command));
227 memset(&data, 0, sizeof(struct mmc_data));
228
229 ath6kl_sdio_setup_scat_data(scat_req, scat_req->req_priv, &data);
230
231 opcode = (scat_req->req & HIF_FIXED_ADDRESS) ?
232 CMD53_ARG_FIXED_ADDRESS : CMD53_ARG_INCR_ADDRESS;
233
234 rw = (scat_req->req & HIF_WRITE) ? CMD53_ARG_WRITE : CMD53_ARG_READ;
235
236 /* Fixup the address so that the last byte will fall on MBOX EOM */
237 if (scat_req->req & HIF_WRITE) {
238 if (scat_req->addr == HIF_MBOX_BASE_ADDR)
239 scat_req->addr += HIF_MBOX_WIDTH - scat_req->len;
240 else
241 /* Uses extended address range */
242 scat_req->addr += HIF_MBOX0_EXT_WIDTH - scat_req->len;
243 }
244
245 /* set command argument */
246 ath6kl_sdio_set_cmd53_arg(&cmd.arg, rw, ar_sdio->func->num,
247 CMD53_ARG_BLOCK_BASIS, opcode, scat_req->addr,
248 data.blocks);
249
250 cmd.opcode = SD_IO_RW_EXTENDED;
251 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
252
253 mmc_req.cmd = &cmd;
254 mmc_req.data = &data;
255
256 mmc_set_data_timeout(&data, ar_sdio->func->card);
257 /* synchronous call to process request */
258 mmc_wait_for_req(ar_sdio->func->card->host, &mmc_req);
259
260 status = cmd.error ? cmd.error : data.error;
261 scat_req->status = status;
262
263 if (scat_req->status)
264 ath6kl_err("Scatter write request failed:%d\n",
265 scat_req->status);
266
267 if (scat_req->req & HIF_ASYNCHRONOUS)
268 scat_req->complete(scat_req);
269
270 return status;
271}
272
273
274/* callback to issue a read-write scatter request */
275static int ath6kl_sdio_async_rw_scatter(struct ath6kl *ar,
276 struct hif_scatter_req *scat_req)
277{
278 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
279 struct hif_scatter_req_priv *req_priv = scat_req->req_priv;
280 u32 request = scat_req->req;
281 int status = 0;
282 unsigned long flags;
283
284 if (!scat_req->len)
285 return -EINVAL;
286
287 ath6kl_dbg(ATH6KL_DBG_SCATTER,
288 "hif-scatter: total len: %d scatter entries: %d\n",
289 scat_req->len, scat_req->scat_entries);
290
291 if (request & HIF_SYNCHRONOUS) {
292 sdio_claim_host(ar_sdio->func);
293 status = ath6kl_sdio_scat_rw(ar_sdio, req_priv->busrequest);
294 sdio_release_host(ar_sdio->func);
295 } else {
296 spin_lock_irqsave(&ar_sdio->wr_async_lock, flags);
297 list_add_tail(&req_priv->busrequest->list, &ar_sdio->wr_asyncq);
298 spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags);
299 queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work);
300 }
301
302 return status;
303}
304
305/* clean up scatter support */
306static void ath6kl_sdio_cleanup_scat_resource(struct ath6kl_sdio *ar_sdio)
307{
308 struct hif_scatter_req *s_req, *tmp_req;
309 unsigned long flag;
310
311 /* empty the free list */
312 spin_lock_irqsave(&ar_sdio->scat_lock, flag);
313 list_for_each_entry_safe(s_req, tmp_req, &ar_sdio->scat_req, list) {
314 list_del(&s_req->list);
315 spin_unlock_irqrestore(&ar_sdio->scat_lock, flag);
316
317 if (s_req->req_priv && s_req->req_priv->busrequest)
318 ath6kl_sdio_free_bus_req(ar_sdio,
319 s_req->req_priv->busrequest);
320 kfree(s_req->virt_dma_buf);
321 kfree(s_req->req_priv);
322 kfree(s_req);
323
324 spin_lock_irqsave(&ar_sdio->scat_lock, flag);
325 }
326 spin_unlock_irqrestore(&ar_sdio->scat_lock, flag);
327}
328
329/* setup of HIF scatter resources */
330static int ath6kl_sdio_setup_scat_resource(struct ath6kl_sdio *ar_sdio,
331 struct hif_dev_scat_sup_info *pinfo)
332{
333 struct hif_scatter_req *s_req;
334 struct bus_request *bus_req;
335 int i, scat_req_sz, scat_list_sz;
336
337 /* check if host supports scatter and it meets our requirements */
338 if (ar_sdio->func->card->host->max_segs < MAX_SCATTER_ENTRIES_PER_REQ) {
339 ath6kl_err("hif-scatter: host only supports scatter of : %d entries, need: %d\n",
340 ar_sdio->func->card->host->max_segs,
341 MAX_SCATTER_ENTRIES_PER_REQ);
342 return -EINVAL;
343 }
344
345 ath6kl_dbg(ATH6KL_DBG_ANY,
346 "hif-scatter enabled: max scatter req : %d entries: %d\n",
347 MAX_SCATTER_REQUESTS, MAX_SCATTER_ENTRIES_PER_REQ);
348
349 scat_list_sz = (MAX_SCATTER_ENTRIES_PER_REQ - 1) *
350 sizeof(struct hif_scatter_item);
351 scat_req_sz = sizeof(*s_req) + scat_list_sz;
352
353 for (i = 0; i < MAX_SCATTER_REQUESTS; i++) {
354 /* allocate the scatter request */
355 s_req = kzalloc(scat_req_sz, GFP_KERNEL);
356 if (!s_req)
357 goto fail_setup_scat;
358
359 /* allocate the private request blob */
360 s_req->req_priv = kzalloc(sizeof(*s_req->req_priv), GFP_KERNEL);
361
362 if (!s_req->req_priv) {
363 kfree(s_req);
364 goto fail_setup_scat;
365 }
366
367 /* allocate a bus request for this scatter request */
368 bus_req = ath6kl_sdio_alloc_busreq(ar_sdio);
369 if (!bus_req) {
370 kfree(s_req->req_priv);
371 kfree(s_req);
372 goto fail_setup_scat;
373 }
374
375 /* assign the scatter request to this bus request */
376 bus_req->scat_req = s_req;
377 s_req->req_priv->busrequest = bus_req;
378 /* add it to the scatter pool */
379 hif_scatter_req_add(ar_sdio->ar, s_req);
380 }
381
382 /* set scatter function pointers */
383 pinfo->rw_scat_func = ath6kl_sdio_async_rw_scatter;
384 pinfo->max_scat_entries = MAX_SCATTER_ENTRIES_PER_REQ;
385 pinfo->max_xfer_szper_scatreq = MAX_SCATTER_REQ_TRANSFER_SIZE;
386
387 return 0;
388
389fail_setup_scat:
390 ath6kl_err("hif-scatter: failed to alloc scatter resources !\n");
391 ath6kl_sdio_cleanup_scat_resource(ar_sdio);
392
393 return -ENOMEM;
394}
395
396static int ath6kl_sdio_read_write_sync(struct ath6kl *ar, u32 addr, u8 *buf,
397 u32 len, u32 request)
398{
399 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
400 u8 *tbuf = NULL;
401 int ret;
402 bool bounced = false;
403
404 if (request & HIF_BLOCK_BASIS)
405 len = round_down(len, HIF_MBOX_BLOCK_SIZE);
406
407 if (buf_needs_bounce(buf)) {
408 if (!ar_sdio->dma_buffer)
409 return -ENOMEM;
410 tbuf = ar_sdio->dma_buffer;
411 memcpy(tbuf, buf, len);
412 bounced = true;
413 } else
414 tbuf = buf;
415
416 sdio_claim_host(ar_sdio->func);
417 if (request & HIF_WRITE) {
418 if (addr >= HIF_MBOX_BASE_ADDR &&
419 addr <= HIF_MBOX_END_ADDR)
420 addr += (HIF_MBOX_WIDTH - len);
421
422 if (addr == HIF_MBOX0_EXT_BASE_ADDR)
423 addr += HIF_MBOX0_EXT_WIDTH - len;
424
425 if (request & HIF_FIXED_ADDRESS)
426 ret = sdio_writesb(ar_sdio->func, addr, tbuf, len);
427 else
428 ret = sdio_memcpy_toio(ar_sdio->func, addr, tbuf, len);
429 } else {
430 if (request & HIF_FIXED_ADDRESS)
431 ret = sdio_readsb(ar_sdio->func, tbuf, addr, len);
432 else
433 ret = sdio_memcpy_fromio(ar_sdio->func, tbuf,
434 addr, len);
435 if (bounced)
436 memcpy(buf, tbuf, len);
437 }
438 sdio_release_host(ar_sdio->func);
439
440 return ret;
441}
442
443static void __ath6kl_sdio_write_async(struct ath6kl_sdio *ar_sdio,
444 struct bus_request *req)
445{
446 if (req->scat_req)
447 ath6kl_sdio_scat_rw(ar_sdio, req);
448 else {
449 void *context;
450 int status;
451
452 status = ath6kl_sdio_read_write_sync(ar_sdio->ar, req->address,
453 req->buffer, req->length,
454 req->request);
455 context = req->packet;
456 ath6kl_sdio_free_bus_req(ar_sdio, req);
457 ath6kldev_rw_comp_handler(context, status);
458 }
459}
460
461static void ath6kl_sdio_write_async_work(struct work_struct *work)
462{
463 struct ath6kl_sdio *ar_sdio;
464 unsigned long flags;
465 struct bus_request *req, *tmp_req;
466
467 ar_sdio = container_of(work, struct ath6kl_sdio, wr_async_work);
468 sdio_claim_host(ar_sdio->func);
469
470 spin_lock_irqsave(&ar_sdio->wr_async_lock, flags);
471 list_for_each_entry_safe(req, tmp_req, &ar_sdio->wr_asyncq, list) {
472 list_del(&req->list);
473 spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags);
474 __ath6kl_sdio_write_async(ar_sdio, req);
475 spin_lock_irqsave(&ar_sdio->wr_async_lock, flags);
476 }
477 spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags);
478
479 sdio_release_host(ar_sdio->func);
480}
481
482static void ath6kl_sdio_irq_handler(struct sdio_func *func)
483{
484 int status;
485 struct ath6kl_sdio *ar_sdio;
486
487 ar_sdio = sdio_get_drvdata(func);
488 atomic_set(&ar_sdio->irq_handling, 1);
489
490 /*
491 * Release the host during interrups so we can pick it back up when
492 * we process commands.
493 */
494 sdio_release_host(ar_sdio->func);
495
496 status = ath6kldev_intr_bh_handler(ar_sdio->ar);
497 sdio_claim_host(ar_sdio->func);
498 atomic_set(&ar_sdio->irq_handling, 0);
499 WARN_ON(status && status != -ECANCELED);
500}
501
502static int ath6kl_sdio_power_on(struct ath6kl_sdio *ar_sdio)
503{
504 struct sdio_func *func = ar_sdio->func;
505 int ret = 0;
506
507 if (!ar_sdio->is_disabled)
508 return 0;
509
510 sdio_claim_host(func);
511
512 ret = sdio_enable_func(func);
513 if (ret) {
514 ath6kl_err("Unable to enable sdio func: %d)\n", ret);
515 sdio_release_host(func);
516 return ret;
517 }
518
519 sdio_release_host(func);
520
521 /*
522 * Wait for hardware to initialise. It should take a lot less than
523 * 10 ms but let's be conservative here.
524 */
525 msleep(10);
526
527 ar_sdio->is_disabled = false;
528
529 return ret;
530}
531
532static int ath6kl_sdio_power_off(struct ath6kl_sdio *ar_sdio)
533{
534 int ret;
535
536 if (ar_sdio->is_disabled)
537 return 0;
538
539 /* Disable the card */
540 sdio_claim_host(ar_sdio->func);
541 ret = sdio_disable_func(ar_sdio->func);
542 sdio_release_host(ar_sdio->func);
543
544 if (ret)
545 return ret;
546
547 ar_sdio->is_disabled = true;
548
549 return ret;
550}
551
552static int ath6kl_sdio_write_async(struct ath6kl *ar, u32 address, u8 *buffer,
553 u32 length, u32 request,
554 struct htc_packet *packet)
555{
556 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
557 struct bus_request *bus_req;
558 unsigned long flags;
559
560 bus_req = ath6kl_sdio_alloc_busreq(ar_sdio);
561
562 if (!bus_req)
563 return -ENOMEM;
564
565 bus_req->address = address;
566 bus_req->buffer = buffer;
567 bus_req->length = length;
568 bus_req->request = request;
569 bus_req->packet = packet;
570
571 spin_lock_irqsave(&ar_sdio->wr_async_lock, flags);
572 list_add_tail(&bus_req->list, &ar_sdio->wr_asyncq);
573 spin_unlock_irqrestore(&ar_sdio->wr_async_lock, flags);
574 queue_work(ar->ath6kl_wq, &ar_sdio->wr_async_work);
575
576 return 0;
577}
578
579static void ath6kl_sdio_irq_enable(struct ath6kl *ar)
580{
581 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
582 int ret;
583
584 sdio_claim_host(ar_sdio->func);
585
586 /* Register the isr */
587 ret = sdio_claim_irq(ar_sdio->func, ath6kl_sdio_irq_handler);
588 if (ret)
589 ath6kl_err("Failed to claim sdio irq: %d\n", ret);
590
591 sdio_release_host(ar_sdio->func);
592}
593
594static void ath6kl_sdio_irq_disable(struct ath6kl *ar)
595{
596 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
597 int ret;
598
599 sdio_claim_host(ar_sdio->func);
600
601 /* Mask our function IRQ */
602 while (atomic_read(&ar_sdio->irq_handling)) {
603 sdio_release_host(ar_sdio->func);
604 schedule_timeout(HZ / 10);
605 sdio_claim_host(ar_sdio->func);
606 }
607
608 ret = sdio_release_irq(ar_sdio->func);
609 if (ret)
610 ath6kl_err("Failed to release sdio irq: %d\n", ret);
611
612 sdio_release_host(ar_sdio->func);
613}
614
615static struct hif_scatter_req *ath6kl_sdio_scatter_req_get(struct ath6kl *ar)
616{
617 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
618 struct hif_scatter_req *node = NULL;
619 unsigned long flag;
620
621 spin_lock_irqsave(&ar_sdio->scat_lock, flag);
622
623 if (!list_empty(&ar_sdio->scat_req)) {
624 node = list_first_entry(&ar_sdio->scat_req,
625 struct hif_scatter_req, list);
626 list_del(&node->list);
627 }
628
629 spin_unlock_irqrestore(&ar_sdio->scat_lock, flag);
630
631 return node;
632}
633
634static void ath6kl_sdio_scatter_req_add(struct ath6kl *ar,
635 struct hif_scatter_req *s_req)
636{
637 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
638 unsigned long flag;
639
640 spin_lock_irqsave(&ar_sdio->scat_lock, flag);
641
642 list_add_tail(&s_req->list, &ar_sdio->scat_req);
643
644 spin_unlock_irqrestore(&ar_sdio->scat_lock, flag);
645
646}
647
648static int ath6kl_sdio_enable_scatter(struct ath6kl *ar,
649 struct hif_dev_scat_sup_info *info)
650{
651 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
652 int ret;
653
654 ret = ath6kl_sdio_setup_scat_resource(ar_sdio, info);
655
656 return ret;
657}
658
659static void ath6kl_sdio_cleanup_scatter(struct ath6kl *ar)
660{
661 struct ath6kl_sdio *ar_sdio = ath6kl_sdio_priv(ar);
662
663 ath6kl_sdio_cleanup_scat_resource(ar_sdio);
664}
665
666static const struct ath6kl_hif_ops ath6kl_sdio_ops = {
667 .read_write_sync = ath6kl_sdio_read_write_sync,
668 .write_async = ath6kl_sdio_write_async,
669 .irq_enable = ath6kl_sdio_irq_enable,
670 .irq_disable = ath6kl_sdio_irq_disable,
671 .scatter_req_get = ath6kl_sdio_scatter_req_get,
672 .scatter_req_add = ath6kl_sdio_scatter_req_add,
673 .enable_scatter = ath6kl_sdio_enable_scatter,
674 .cleanup_scatter = ath6kl_sdio_cleanup_scatter,
675};
676
677static int ath6kl_sdio_probe(struct sdio_func *func,
678 const struct sdio_device_id *id)
679{
680 int ret;
681 struct ath6kl_sdio *ar_sdio;
682 struct ath6kl *ar;
683 int count;
684
685 ath6kl_dbg(ATH6KL_DBG_TRC,
686 "%s: func: 0x%X, vendor id: 0x%X, dev id: 0x%X, block size: 0x%X/0x%X\n",
687 __func__, func->num, func->vendor,
688 func->device, func->max_blksize, func->cur_blksize);
689
690 ar_sdio = kzalloc(sizeof(struct ath6kl_sdio), GFP_KERNEL);
691 if (!ar_sdio)
692 return -ENOMEM;
693
694 ar_sdio->dma_buffer = kzalloc(HIF_DMA_BUFFER_SIZE, GFP_KERNEL);
695 if (!ar_sdio->dma_buffer) {
696 ret = -ENOMEM;
697 goto err_hif;
698 }
699
700 ar_sdio->func = func;
701 sdio_set_drvdata(func, ar_sdio);
702
703 ar_sdio->id = id;
704 ar_sdio->is_disabled = true;
705
706 spin_lock_init(&ar_sdio->lock);
707 spin_lock_init(&ar_sdio->scat_lock);
708 spin_lock_init(&ar_sdio->wr_async_lock);
709
710 INIT_LIST_HEAD(&ar_sdio->scat_req);
711 INIT_LIST_HEAD(&ar_sdio->bus_req_freeq);
712 INIT_LIST_HEAD(&ar_sdio->wr_asyncq);
713
714 INIT_WORK(&ar_sdio->wr_async_work, ath6kl_sdio_write_async_work);
715
716 for (count = 0; count < BUS_REQUEST_MAX_NUM; count++)
717 ath6kl_sdio_free_bus_req(ar_sdio, &ar_sdio->bus_req[count]);
718
719 ar = ath6kl_core_alloc(&ar_sdio->func->dev);
720 if (!ar) {
721 ath6kl_err("Failed to alloc ath6kl core\n");
722 ret = -ENOMEM;
723 goto err_dma;
724 }
725
726 ar_sdio->ar = ar;
727 ar->hif_priv = ar_sdio;
728 ar->hif_ops = &ath6kl_sdio_ops;
729
730 ath6kl_sdio_set_mbox_info(ar);
731
732 sdio_claim_host(func);
733
734 if ((ar_sdio->id->device & MANUFACTURER_ID_ATH6KL_BASE_MASK) >=
735 MANUFACTURER_ID_AR6003_BASE) {
736 /* enable 4-bit ASYNC interrupt on AR6003 or later */
737 ret = ath6kl_sdio_func0_cmd52_wr_byte(func->card,
738 CCCR_SDIO_IRQ_MODE_REG,
739 SDIO_IRQ_MODE_ASYNC_4BIT_IRQ);
740 if (ret) {
741 ath6kl_err("Failed to enable 4-bit async irq mode %d\n",
742 ret);
743 sdio_release_host(func);
744 goto err_dma;
745 }
746
747 ath6kl_dbg(ATH6KL_DBG_TRC, "4-bit async irq mode enabled\n");
748 }
749
750 /* give us some time to enable, in ms */
751 func->enable_timeout = 100;
752
753 sdio_release_host(func);
754
755 ret = ath6kl_sdio_power_on(ar_sdio);
756 if (ret)
757 goto err_dma;
758
759 sdio_claim_host(func);
760
761 ret = sdio_set_block_size(func, HIF_MBOX_BLOCK_SIZE);
762 if (ret) {
763 ath6kl_err("Set sdio block size %d failed: %d)\n",
764 HIF_MBOX_BLOCK_SIZE, ret);
765 sdio_release_host(func);
766 goto err_off;
767 }
768
769 sdio_release_host(func);
770
771 ret = ath6kl_core_init(ar);
772 if (ret) {
773 ath6kl_err("Failed to init ath6kl core\n");
774 goto err_off;
775 }
776
777 return ret;
778
779err_off:
780 ath6kl_sdio_power_off(ar_sdio);
781err_dma:
782 kfree(ar_sdio->dma_buffer);
783err_hif:
784 kfree(ar_sdio);
785
786 return ret;
787}
788
789static void ath6kl_sdio_remove(struct sdio_func *func)
790{
791 struct ath6kl_sdio *ar_sdio;
792
793 ar_sdio = sdio_get_drvdata(func);
794
795 ath6kl_stop_txrx(ar_sdio->ar);
796 cancel_work_sync(&ar_sdio->wr_async_work);
797
798 ath6kl_unavail_ev(ar_sdio->ar);
799
800 ath6kl_sdio_power_off(ar_sdio);
801
802 kfree(ar_sdio->dma_buffer);
803 kfree(ar_sdio);
804}
805
806static const struct sdio_device_id ath6kl_sdio_devices[] = {
807 {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x0))},
808 {SDIO_DEVICE(MANUFACTURER_CODE, (MANUFACTURER_ID_AR6003_BASE | 0x1))},
809 {},
810};
811
812MODULE_DEVICE_TABLE(sdio, ath6kl_sdio_devices);
813
814static struct sdio_driver ath6kl_sdio_driver = {
815 .name = "ath6kl_sdio",
816 .id_table = ath6kl_sdio_devices,
817 .probe = ath6kl_sdio_probe,
818 .remove = ath6kl_sdio_remove,
819};
820
821static int __init ath6kl_sdio_init(void)
822{
823 int ret;
824
825 ret = sdio_register_driver(&ath6kl_sdio_driver);
826 if (ret)
827 ath6kl_err("sdio driver registration failed: %d\n", ret);
828
829 return ret;
830}
831
832static void __exit ath6kl_sdio_exit(void)
833{
834 sdio_unregister_driver(&ath6kl_sdio_driver);
835}
836
837module_init(ath6kl_sdio_init);
838module_exit(ath6kl_sdio_exit);
839
840MODULE_AUTHOR("Atheros Communications, Inc.");
841MODULE_DESCRIPTION("Driver support for Atheros AR600x SDIO devices");
842MODULE_LICENSE("Dual BSD/GPL");
843
844MODULE_FIRMWARE(AR6003_REV2_OTP_FILE);
845MODULE_FIRMWARE(AR6003_REV2_FIRMWARE_FILE);
846MODULE_FIRMWARE(AR6003_REV2_PATCH_FILE);
847MODULE_FIRMWARE(AR6003_REV2_BOARD_DATA_FILE);
848MODULE_FIRMWARE(AR6003_REV2_DEFAULT_BOARD_DATA_FILE);
849MODULE_FIRMWARE(AR6003_REV3_OTP_FILE);
850MODULE_FIRMWARE(AR6003_REV3_FIRMWARE_FILE);
851MODULE_FIRMWARE(AR6003_REV3_PATCH_FILE);
852MODULE_FIRMWARE(AR6003_REV3_BOARD_DATA_FILE);
853MODULE_FIRMWARE(AR6003_REV3_DEFAULT_BOARD_DATA_FILE);
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-14 11:48:15 -0500