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brcmfmac: rework single packet transfers
[deliverable/linux.git] / drivers / net / wireless / brcm80211 / brcmfmac / bcmsdh.c
1 /*
2 * Copyright (c) 2010 Broadcom Corporation
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 ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16 /* ****************** SDIO CARD Interface Functions **************************/
17
18 #include <linux/types.h>
19 #include <linux/netdevice.h>
20 #include <linux/export.h>
21 #include <linux/pci.h>
22 #include <linux/pci_ids.h>
23 #include <linux/sched.h>
24 #include <linux/completion.h>
25 #include <linux/scatterlist.h>
26 #include <linux/mmc/sdio.h>
27 #include <linux/mmc/sdio_func.h>
28 #include <linux/mmc/card.h>
29 #include <linux/platform_data/brcmfmac-sdio.h>
30
31 #include <defs.h>
32 #include <brcm_hw_ids.h>
33 #include <brcmu_utils.h>
34 #include <brcmu_wifi.h>
35 #include <soc.h>
36 #include "dhd_bus.h"
37 #include "dhd_dbg.h"
38 #include "sdio_host.h"
39
40 #define SDIOH_API_ACCESS_RETRY_LIMIT 2
41
42
43 static irqreturn_t brcmf_sdio_oob_irqhandler(int irq, void *dev_id)
44 {
45 struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
46 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
47
48 brcmf_dbg(INTR, "OOB intr triggered\n");
49
50 /* out-of-band interrupt is level-triggered which won't
51 * be cleared until dpc
52 */
53 if (sdiodev->irq_en) {
54 disable_irq_nosync(irq);
55 sdiodev->irq_en = false;
56 }
57
58 brcmf_sdbrcm_isr(sdiodev->bus);
59
60 return IRQ_HANDLED;
61 }
62
63 static void brcmf_sdio_ib_irqhandler(struct sdio_func *func)
64 {
65 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
66 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
67
68 brcmf_dbg(INTR, "IB intr triggered\n");
69
70 brcmf_sdbrcm_isr(sdiodev->bus);
71 }
72
73 /* dummy handler for SDIO function 2 interrupt */
74 static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
75 {
76 }
77
78 int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
79 {
80 int ret = 0;
81 u8 data;
82 unsigned long flags;
83
84 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
85 brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
86 sdiodev->pdata->oob_irq_nr);
87 ret = request_irq(sdiodev->pdata->oob_irq_nr,
88 brcmf_sdio_oob_irqhandler,
89 sdiodev->pdata->oob_irq_flags,
90 "brcmf_oob_intr",
91 &sdiodev->func[1]->dev);
92 if (ret != 0) {
93 brcmf_err("request_irq failed %d\n", ret);
94 return ret;
95 }
96 sdiodev->oob_irq_requested = true;
97 spin_lock_init(&sdiodev->irq_en_lock);
98 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
99 sdiodev->irq_en = true;
100 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
101
102 ret = enable_irq_wake(sdiodev->pdata->oob_irq_nr);
103 if (ret != 0) {
104 brcmf_err("enable_irq_wake failed %d\n", ret);
105 return ret;
106 }
107 sdiodev->irq_wake = true;
108
109 sdio_claim_host(sdiodev->func[1]);
110
111 /* must configure SDIO_CCCR_IENx to enable irq */
112 data = brcmf_sdio_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
113 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
114 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
115
116 /* redirect, configure and enable io for interrupt signal */
117 data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
118 if (sdiodev->pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
119 data |= SDIO_SEPINT_ACT_HI;
120 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
121
122 sdio_release_host(sdiodev->func[1]);
123 } else {
124 brcmf_dbg(SDIO, "Entering\n");
125 sdio_claim_host(sdiodev->func[1]);
126 sdio_claim_irq(sdiodev->func[1], brcmf_sdio_ib_irqhandler);
127 sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
128 sdio_release_host(sdiodev->func[1]);
129 }
130
131 return 0;
132 }
133
134 int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
135 {
136 brcmf_dbg(SDIO, "Entering\n");
137
138 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
139 sdio_claim_host(sdiodev->func[1]);
140 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
141 brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
142 sdio_release_host(sdiodev->func[1]);
143
144 if (sdiodev->oob_irq_requested) {
145 sdiodev->oob_irq_requested = false;
146 if (sdiodev->irq_wake) {
147 disable_irq_wake(sdiodev->pdata->oob_irq_nr);
148 sdiodev->irq_wake = false;
149 }
150 free_irq(sdiodev->pdata->oob_irq_nr,
151 &sdiodev->func[1]->dev);
152 sdiodev->irq_en = false;
153 }
154 } else {
155 sdio_claim_host(sdiodev->func[1]);
156 sdio_release_irq(sdiodev->func[2]);
157 sdio_release_irq(sdiodev->func[1]);
158 sdio_release_host(sdiodev->func[1]);
159 }
160
161 return 0;
162 }
163
164 static int
165 brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
166 {
167 int err = 0, i;
168 u8 addr[3];
169 s32 retry;
170
171 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
172 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
173 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
174
175 for (i = 0; i < 3; i++) {
176 retry = 0;
177 do {
178 if (retry)
179 usleep_range(1000, 2000);
180 err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
181 SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
182 &addr[i]);
183 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
184
185 if (err) {
186 brcmf_err("failed at addr:0x%0x\n",
187 SBSDIO_FUNC1_SBADDRLOW + i);
188 break;
189 }
190 }
191
192 return err;
193 }
194
195 static int
196 brcmf_sdio_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr)
197 {
198 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
199 int err = 0;
200
201 if (bar0 != sdiodev->sbwad) {
202 err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
203 if (err)
204 return err;
205
206 sdiodev->sbwad = bar0;
207 }
208
209 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
210
211 if (width == 4)
212 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
213
214 return 0;
215 }
216
217 int
218 brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
219 void *data, bool write)
220 {
221 u8 func_num, reg_size;
222 s32 retry = 0;
223 int ret;
224
225 /*
226 * figure out how to read the register based on address range
227 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
228 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
229 * The rest: function 1 silicon backplane core registers
230 */
231 if ((addr & ~REG_F0_REG_MASK) == 0) {
232 func_num = SDIO_FUNC_0;
233 reg_size = 1;
234 } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
235 func_num = SDIO_FUNC_1;
236 reg_size = 1;
237 } else {
238 func_num = SDIO_FUNC_1;
239 reg_size = 4;
240
241 brcmf_sdio_addrprep(sdiodev, reg_size, &addr);
242 }
243
244 do {
245 if (!write)
246 memset(data, 0, reg_size);
247 if (retry) /* wait for 1 ms till bus get settled down */
248 usleep_range(1000, 2000);
249 if (reg_size == 1)
250 ret = brcmf_sdioh_request_byte(sdiodev, write,
251 func_num, addr, data);
252 else
253 ret = brcmf_sdioh_request_word(sdiodev, write,
254 func_num, addr, data, 4);
255 } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
256
257 if (ret != 0)
258 brcmf_err("failed with %d\n", ret);
259
260 return ret;
261 }
262
263 u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
264 {
265 u8 data;
266 int retval;
267
268 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
269 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
270 brcmf_dbg(SDIO, "data:0x%02x\n", data);
271
272 if (ret)
273 *ret = retval;
274
275 return data;
276 }
277
278 u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
279 {
280 u32 data;
281 int retval;
282
283 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
284 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
285 brcmf_dbg(SDIO, "data:0x%08x\n", data);
286
287 if (ret)
288 *ret = retval;
289
290 return data;
291 }
292
293 void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
294 u8 data, int *ret)
295 {
296 int retval;
297
298 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
299 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
300
301 if (ret)
302 *ret = retval;
303 }
304
305 void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
306 u32 data, int *ret)
307 {
308 int retval;
309
310 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
311 retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
312
313 if (ret)
314 *ret = retval;
315 }
316
317 static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
318 bool write, u32 addr, struct sk_buff *pkt)
319 {
320 unsigned int req_sz;
321
322 brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
323 if (brcmf_pm_resume_error(sdiodev))
324 return -EIO;
325
326 /* Single skb use the standard mmc interface */
327 req_sz = pkt->len + 3;
328 req_sz &= (uint)~3;
329
330 if (write)
331 return sdio_memcpy_toio(sdiodev->func[fn], addr,
332 ((u8 *)(pkt->data)),
333 req_sz);
334 else if (fn == 1)
335 return sdio_memcpy_fromio(sdiodev->func[fn],
336 ((u8 *)(pkt->data)),
337 addr, req_sz);
338 else
339 /* function 2 read is FIFO operation */
340 return sdio_readsb(sdiodev->func[fn],
341 ((u8 *)(pkt->data)), addr,
342 req_sz);
343 }
344
345 /**
346 * brcmf_sdio_sglist_rw - SDIO interface function for block data access
347 * @sdiodev: brcmfmac sdio device
348 * @fn: SDIO function number
349 * @write: direction flag
350 * @addr: dongle memory address as source/destination
351 * @pkt: skb pointer
352 *
353 * This function takes the respbonsibility as the interface function to MMC
354 * stack for block data access. It assumes that the skb passed down by the
355 * caller has already been padded and aligned.
356 */
357 static int brcmf_sdio_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn,
358 bool write, u32 addr,
359 struct sk_buff_head *pktlist)
360 {
361 unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
362 unsigned int max_req_sz, orig_offset, dst_offset;
363 unsigned short max_seg_cnt, seg_sz;
364 unsigned char *pkt_data, *orig_data, *dst_data;
365 struct sk_buff *pkt_next = NULL, *local_pkt_next;
366 struct sk_buff_head local_list, *target_list;
367 struct mmc_request mmc_req;
368 struct mmc_command mmc_cmd;
369 struct mmc_data mmc_dat;
370 struct sg_table st;
371 struct scatterlist *sgl;
372 int ret = 0;
373
374 if (!pktlist->qlen)
375 return -EINVAL;
376
377 brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
378 if (brcmf_pm_resume_error(sdiodev))
379 return -EIO;
380
381 target_list = pktlist;
382 /* for host with broken sg support, prepare a page aligned list */
383 __skb_queue_head_init(&local_list);
384 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
385 req_sz = 0;
386 skb_queue_walk(pktlist, pkt_next)
387 req_sz += pkt_next->len;
388 req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize);
389 while (req_sz > PAGE_SIZE) {
390 pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE);
391 if (pkt_next == NULL) {
392 ret = -ENOMEM;
393 goto exit;
394 }
395 __skb_queue_tail(&local_list, pkt_next);
396 req_sz -= PAGE_SIZE;
397 }
398 pkt_next = brcmu_pkt_buf_get_skb(req_sz);
399 if (pkt_next == NULL) {
400 ret = -ENOMEM;
401 goto exit;
402 }
403 __skb_queue_tail(&local_list, pkt_next);
404 target_list = &local_list;
405 }
406
407 func_blk_sz = sdiodev->func[fn]->cur_blksize;
408 max_req_sz = sdiodev->max_request_size;
409 max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count,
410 target_list->qlen);
411 seg_sz = target_list->qlen;
412 pkt_offset = 0;
413 pkt_next = target_list->next;
414
415 if (sg_alloc_table(&st, max_seg_cnt, GFP_KERNEL)) {
416 ret = -ENOMEM;
417 goto exit;
418 }
419
420 memset(&mmc_req, 0, sizeof(struct mmc_request));
421 memset(&mmc_cmd, 0, sizeof(struct mmc_command));
422 memset(&mmc_dat, 0, sizeof(struct mmc_data));
423
424 mmc_dat.sg = st.sgl;
425 mmc_dat.blksz = func_blk_sz;
426 mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
427 mmc_cmd.opcode = SD_IO_RW_EXTENDED;
428 mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
429 mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
430 mmc_cmd.arg |= 1<<27; /* block mode */
431 /* for function 1 the addr will be incremented */
432 mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
433 mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
434 mmc_req.cmd = &mmc_cmd;
435 mmc_req.data = &mmc_dat;
436
437 while (seg_sz) {
438 req_sz = 0;
439 sg_cnt = 0;
440 sgl = st.sgl;
441 /* prep sg table */
442 while (pkt_next != (struct sk_buff *)target_list) {
443 pkt_data = pkt_next->data + pkt_offset;
444 sg_data_sz = pkt_next->len - pkt_offset;
445 if (sg_data_sz > sdiodev->max_segment_size)
446 sg_data_sz = sdiodev->max_segment_size;
447 if (sg_data_sz > max_req_sz - req_sz)
448 sg_data_sz = max_req_sz - req_sz;
449
450 sg_set_buf(sgl, pkt_data, sg_data_sz);
451
452 sg_cnt++;
453 sgl = sg_next(sgl);
454 req_sz += sg_data_sz;
455 pkt_offset += sg_data_sz;
456 if (pkt_offset == pkt_next->len) {
457 pkt_offset = 0;
458 pkt_next = pkt_next->next;
459 }
460
461 if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt)
462 break;
463 }
464 seg_sz -= sg_cnt;
465
466 if (req_sz % func_blk_sz != 0) {
467 brcmf_err("sg request length %u is not %u aligned\n",
468 req_sz, func_blk_sz);
469 ret = -ENOTBLK;
470 goto exit;
471 }
472
473 mmc_dat.sg_len = sg_cnt;
474 mmc_dat.blocks = req_sz / func_blk_sz;
475 mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
476 mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
477 /* incrementing addr for function 1 */
478 if (fn == 1)
479 addr += req_sz;
480
481 mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
482 mmc_wait_for_req(sdiodev->func[fn]->card->host, &mmc_req);
483
484 ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
485 if (ret != 0) {
486 brcmf_err("CMD53 sg block %s failed %d\n",
487 write ? "write" : "read", ret);
488 ret = -EIO;
489 break;
490 }
491 }
492
493 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
494 local_pkt_next = local_list.next;
495 orig_offset = 0;
496 skb_queue_walk(pktlist, pkt_next) {
497 dst_offset = 0;
498 do {
499 req_sz = local_pkt_next->len - orig_offset;
500 req_sz = min_t(uint, pkt_next->len - dst_offset,
501 req_sz);
502 orig_data = local_pkt_next->data + orig_offset;
503 dst_data = pkt_next->data + dst_offset;
504 memcpy(dst_data, orig_data, req_sz);
505 orig_offset += req_sz;
506 dst_offset += req_sz;
507 if (orig_offset == local_pkt_next->len) {
508 orig_offset = 0;
509 local_pkt_next = local_pkt_next->next;
510 }
511 if (dst_offset == pkt_next->len)
512 break;
513 } while (!skb_queue_empty(&local_list));
514 }
515 }
516
517 exit:
518 sg_free_table(&st);
519 while ((pkt_next = __skb_dequeue(&local_list)) != NULL)
520 brcmu_pkt_buf_free_skb(pkt_next);
521
522 return ret;
523 }
524
525 int
526 brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
527 uint flags, u8 *buf, uint nbytes)
528 {
529 struct sk_buff *mypkt;
530 int err;
531
532 mypkt = brcmu_pkt_buf_get_skb(nbytes);
533 if (!mypkt) {
534 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
535 nbytes);
536 return -EIO;
537 }
538
539 err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
540 if (!err)
541 memcpy(buf, mypkt->data, nbytes);
542
543 brcmu_pkt_buf_free_skb(mypkt);
544 return err;
545 }
546
547 int
548 brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
549 uint flags, struct sk_buff *pkt)
550 {
551 uint width;
552 int err = 0;
553
554 brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
555 fn, addr, pkt->len);
556
557 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
558 err = brcmf_sdio_addrprep(sdiodev, width, &addr);
559 if (err)
560 goto done;
561
562 err = brcmf_sdio_buffrw(sdiodev, fn, false, addr, pkt);
563
564 done:
565 return err;
566 }
567
568 int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
569 uint flags, struct sk_buff_head *pktq)
570 {
571 uint incr_fix;
572 uint width;
573 int err = 0;
574
575 brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
576 fn, addr, pktq->qlen);
577
578 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
579 err = brcmf_sdio_addrprep(sdiodev, width, &addr);
580 if (err)
581 goto done;
582
583 incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
584 err = brcmf_sdio_sglist_rw(sdiodev, fn, false, addr, pktq);
585
586 done:
587 return err;
588 }
589
590 int
591 brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
592 uint flags, u8 *buf, uint nbytes)
593 {
594 struct sk_buff *mypkt;
595 uint width;
596 int err;
597
598 mypkt = brcmu_pkt_buf_get_skb(nbytes);
599 if (!mypkt) {
600 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
601 nbytes);
602 return -EIO;
603 }
604
605 memcpy(mypkt->data, buf, nbytes);
606
607 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
608 brcmf_sdio_addrprep(sdiodev, width, &addr);
609
610 err = brcmf_sdio_buffrw(sdiodev, fn, true, addr, mypkt);
611
612 brcmu_pkt_buf_free_skb(mypkt);
613 return err;
614
615 }
616
617 int
618 brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
619 uint flags, struct sk_buff_head *pktq)
620 {
621 uint width;
622
623 brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
624 fn, addr, pktq->qlen);
625
626 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
627 brcmf_sdio_addrprep(sdiodev, width, &addr);
628
629 if (pktq->qlen == 1)
630 return brcmf_sdio_buffrw(sdiodev, fn, true, addr, pktq->next);
631 return brcmf_sdio_sglist_rw(sdiodev, fn, true, addr, pktq);
632 }
633
634 int
635 brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
636 u8 *data, uint size)
637 {
638 int bcmerror = 0;
639 struct sk_buff *pkt;
640 u32 sdaddr;
641 uint dsize;
642
643 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
644 pkt = dev_alloc_skb(dsize);
645 if (!pkt) {
646 brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
647 return -EIO;
648 }
649 pkt->priority = 0;
650
651 /* Determine initial transfer parameters */
652 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
653 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
654 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
655 else
656 dsize = size;
657
658 sdio_claim_host(sdiodev->func[1]);
659
660 /* Do the transfer(s) */
661 while (size) {
662 /* Set the backplane window to include the start address */
663 bcmerror = brcmf_sdcard_set_sbaddr_window(sdiodev, address);
664 if (bcmerror)
665 break;
666
667 brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
668 write ? "write" : "read", dsize,
669 sdaddr, address & SBSDIO_SBWINDOW_MASK);
670
671 sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
672 sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
673
674 skb_put(pkt, dsize);
675 if (write)
676 memcpy(pkt->data, data, dsize);
677 bcmerror = brcmf_sdio_buffrw(sdiodev, SDIO_FUNC_1, write,
678 sdaddr, pkt);
679 if (bcmerror) {
680 brcmf_err("membytes transfer failed\n");
681 break;
682 }
683 if (!write)
684 memcpy(data, pkt->data, dsize);
685 skb_trim(pkt, dsize);
686
687 /* Adjust for next transfer (if any) */
688 size -= dsize;
689 if (size) {
690 data += dsize;
691 address += dsize;
692 sdaddr = 0;
693 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
694 }
695 }
696
697 dev_kfree_skb(pkt);
698
699 /* Return the window to backplane enumeration space for core access */
700 if (brcmf_sdcard_set_sbaddr_window(sdiodev, sdiodev->sbwad))
701 brcmf_err("FAILED to set window back to 0x%x\n",
702 sdiodev->sbwad);
703
704 sdio_release_host(sdiodev->func[1]);
705
706 return bcmerror;
707 }
708
709 int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
710 {
711 char t_func = (char)fn;
712 brcmf_dbg(SDIO, "Enter\n");
713
714 /* issue abort cmd52 command through F0 */
715 brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
716 SDIO_CCCR_ABORT, &t_func);
717
718 brcmf_dbg(SDIO, "Exit\n");
719 return 0;
720 }
721
722 int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
723 {
724 u32 regs = 0;
725 int ret = 0;
726
727 ret = brcmf_sdioh_attach(sdiodev);
728 if (ret)
729 goto out;
730
731 regs = SI_ENUM_BASE;
732
733 /* try to attach to the target device */
734 sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
735 if (!sdiodev->bus) {
736 brcmf_err("device attach failed\n");
737 ret = -ENODEV;
738 goto out;
739 }
740
741 out:
742 if (ret)
743 brcmf_sdio_remove(sdiodev);
744
745 return ret;
746 }
747 EXPORT_SYMBOL(brcmf_sdio_probe);
748
749 int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
750 {
751 sdiodev->bus_if->state = BRCMF_BUS_DOWN;
752
753 if (sdiodev->bus) {
754 brcmf_sdbrcm_disconnect(sdiodev->bus);
755 sdiodev->bus = NULL;
756 }
757
758 brcmf_sdioh_detach(sdiodev);
759
760 sdiodev->sbwad = 0;
761
762 return 0;
763 }
764 EXPORT_SYMBOL(brcmf_sdio_remove);
765
766 void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
767 {
768 if (enable)
769 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
770 else
771 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
772 }
Linux kernel - Deliverables
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