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brcmfmac: add owner info to sdio_driver structure
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / brcm80211 / brcmfmac / bcmsdh.c
blob9eb6f786b3b48681c169e0c7169ad7b51342c098
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/pci.h>
21 #include <linux/pci_ids.h>
22 #include <linux/sched.h>
23 #include <linux/completion.h>
24 #include <linux/scatterlist.h>
25 #include <linux/mmc/sdio.h>
26 #include <linux/mmc/core.h>
27 #include <linux/mmc/sdio_func.h>
28 #include <linux/mmc/sdio_ids.h>
29 #include <linux/mmc/card.h>
30 #include <linux/mmc/host.h>
31 #include <linux/platform_device.h>
32 #include <linux/platform_data/brcmfmac-sdio.h>
33 #include <linux/suspend.h>
34 #include <linux/errno.h>
35 #include <linux/module.h>
36 #include <net/cfg80211.h>
37
38 #include <defs.h>
39 #include <brcm_hw_ids.h>
40 #include <brcmu_utils.h>
41 #include <brcmu_wifi.h>
42 #include <soc.h>
43 #include "dhd_bus.h"
44 #include "dhd_dbg.h"
45 #include "sdio_host.h"
46 #include "sdio_chip.h"
47
48 #define SDIOH_API_ACCESS_RETRY_LIMIT 2
49
50 #define DMA_ALIGN_MASK 0x03
51
52 #define SDIO_FUNC1_BLOCKSIZE 64
53 #define SDIO_FUNC2_BLOCKSIZE 512
54 /* Maximum milliseconds to wait for F2 to come up */
55 #define SDIO_WAIT_F2RDY 3000
56
57
58 static irqreturn_t brcmf_sdiod_oob_irqhandler(int irq, void *dev_id)
59 {
60 struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
61 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
62
63 brcmf_dbg(INTR, "OOB intr triggered\n");
64
65 /* out-of-band interrupt is level-triggered which won't
66 * be cleared until dpc
67 */
68 if (sdiodev->irq_en) {
69 disable_irq_nosync(irq);
70 sdiodev->irq_en = false;
71 }
72
73 brcmf_sdio_isr(sdiodev->bus);
74
75 return IRQ_HANDLED;
76 }
77
78 static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func)
79 {
80 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
81 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
82
83 brcmf_dbg(INTR, "IB intr triggered\n");
84
85 brcmf_sdio_isr(sdiodev->bus);
86 }
87
88 /* dummy handler for SDIO function 2 interrupt */
89 static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func)
90 {
91 }
92
93 static bool brcmf_sdiod_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
94 {
95 bool is_err = false;
96 #ifdef CONFIG_PM_SLEEP
97 is_err = atomic_read(&sdiodev->suspend);
98 #endif
99 return is_err;
100 }
101
102 static void brcmf_sdiod_pm_resume_wait(struct brcmf_sdio_dev *sdiodev,
103 wait_queue_head_t *wq)
104 {
105 #ifdef CONFIG_PM_SLEEP
106 int retry = 0;
107 while (atomic_read(&sdiodev->suspend) && retry++ != 30)
108 wait_event_timeout(*wq, false, HZ/100);
109 #endif
110 }
111
112 int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev)
113 {
114 int ret = 0;
115 u8 data;
116 unsigned long flags;
117
118 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
119 brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
120 sdiodev->pdata->oob_irq_nr);
121 ret = request_irq(sdiodev->pdata->oob_irq_nr,
122 brcmf_sdiod_oob_irqhandler,
123 sdiodev->pdata->oob_irq_flags,
124 "brcmf_oob_intr",
125 &sdiodev->func[1]->dev);
126 if (ret != 0) {
127 brcmf_err("request_irq failed %d\n", ret);
128 return ret;
129 }
130 sdiodev->oob_irq_requested = true;
131 spin_lock_init(&sdiodev->irq_en_lock);
132 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
133 sdiodev->irq_en = true;
134 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
135
136 ret = enable_irq_wake(sdiodev->pdata->oob_irq_nr);
137 if (ret != 0) {
138 brcmf_err("enable_irq_wake failed %d\n", ret);
139 return ret;
140 }
141 sdiodev->irq_wake = true;
142
143 sdio_claim_host(sdiodev->func[1]);
144
145 /* must configure SDIO_CCCR_IENx to enable irq */
146 data = brcmf_sdiod_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
147 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
148 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
149
150 /* redirect, configure and enable io for interrupt signal */
151 data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
152 if (sdiodev->pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
153 data |= SDIO_SEPINT_ACT_HI;
154 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
155
156 sdio_release_host(sdiodev->func[1]);
157 } else {
158 brcmf_dbg(SDIO, "Entering\n");
159 sdio_claim_host(sdiodev->func[1]);
160 sdio_claim_irq(sdiodev->func[1], brcmf_sdiod_ib_irqhandler);
161 sdio_claim_irq(sdiodev->func[2], brcmf_sdiod_dummy_irqhandler);
162 sdio_release_host(sdiodev->func[1]);
163 }
164
165 return 0;
166 }
167
168 int brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)
169 {
170 brcmf_dbg(SDIO, "Entering\n");
171
172 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
173 sdio_claim_host(sdiodev->func[1]);
174 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
175 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
176 sdio_release_host(sdiodev->func[1]);
177
178 if (sdiodev->oob_irq_requested) {
179 sdiodev->oob_irq_requested = false;
180 if (sdiodev->irq_wake) {
181 disable_irq_wake(sdiodev->pdata->oob_irq_nr);
182 sdiodev->irq_wake = false;
183 }
184 free_irq(sdiodev->pdata->oob_irq_nr,
185 &sdiodev->func[1]->dev);
186 sdiodev->irq_en = false;
187 }
188 } else {
189 sdio_claim_host(sdiodev->func[1]);
190 sdio_release_irq(sdiodev->func[2]);
191 sdio_release_irq(sdiodev->func[1]);
192 sdio_release_host(sdiodev->func[1]);
193 }
194
195 return 0;
196 }
197
198 static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func,
199 uint regaddr, u8 byte)
200 {
201 int err_ret;
202
203 /*
204 * Can only directly write to some F0 registers.
205 * Handle CCCR_IENx and CCCR_ABORT command
206 * as a special case.
207 */
208 if ((regaddr == SDIO_CCCR_ABORT) ||
209 (regaddr == SDIO_CCCR_IENx))
210 sdio_writeb(func, byte, regaddr, &err_ret);
211 else
212 sdio_f0_writeb(func, byte, regaddr, &err_ret);
213
214 return err_ret;
215 }
216
217 static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn,
218 u32 addr, u8 regsz, void *data, bool write)
219 {
220 struct sdio_func *func;
221 int ret;
222
223 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
224 write, fn, addr, regsz);
225
226 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
227 if (brcmf_sdiod_pm_resume_error(sdiodev))
228 return -EIO;
229
230 /* only allow byte access on F0 */
231 if (WARN_ON(regsz > 1 && !fn))
232 return -EINVAL;
233 func = sdiodev->func[fn];
234
235 switch (regsz) {
236 case sizeof(u8):
237 if (write) {
238 if (fn)
239 sdio_writeb(func, *(u8 *)data, addr, &ret);
240 else
241 ret = brcmf_sdiod_f0_writeb(func, addr,
242 *(u8 *)data);
243 } else {
244 if (fn)
245 *(u8 *)data = sdio_readb(func, addr, &ret);
246 else
247 *(u8 *)data = sdio_f0_readb(func, addr, &ret);
248 }
249 break;
250 case sizeof(u16):
251 if (write)
252 sdio_writew(func, *(u16 *)data, addr, &ret);
253 else
254 *(u16 *)data = sdio_readw(func, addr, &ret);
255 break;
256 case sizeof(u32):
257 if (write)
258 sdio_writel(func, *(u32 *)data, addr, &ret);
259 else
260 *(u32 *)data = sdio_readl(func, addr, &ret);
261 break;
262 default:
263 brcmf_err("invalid size: %d\n", regsz);
264 break;
265 }
266
267 if (ret) {
268 /*
269 * SleepCSR register access can fail when
270 * waking up the device so reduce this noise
271 * in the logs.
272 */
273 if (addr != SBSDIO_FUNC1_SLEEPCSR)
274 brcmf_err("failed to %s data F%d@0x%05x, err: %d\n",
275 write ? "write" : "read", fn, addr, ret);
276 else
277 brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
278 write ? "write" : "read", fn, addr, ret);
279 }
280 return ret;
281 }
282
283 static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
284 u8 regsz, void *data, bool write)
285 {
286 u8 func_num;
287 s32 retry = 0;
288 int ret;
289
290 if (sdiodev->bus_if->state == BRCMF_BUS_NOMEDIUM)
291 return -ENOMEDIUM;
292
293 /*
294 * figure out how to read the register based on address range
295 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
296 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
297 * The rest: function 1 silicon backplane core registers
298 */
299 if ((addr & ~REG_F0_REG_MASK) == 0)
300 func_num = SDIO_FUNC_0;
301 else
302 func_num = SDIO_FUNC_1;
303
304 do {
305 if (!write)
306 memset(data, 0, regsz);
307 /* for retry wait for 1 ms till bus get settled down */
308 if (retry)
309 usleep_range(1000, 2000);
310 ret = brcmf_sdiod_request_data(sdiodev, func_num, addr, regsz,
311 data, write);
312 } while (ret != 0 && ret != -ENOMEDIUM &&
313 retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
314
315 if (ret == -ENOMEDIUM)
316 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_NOMEDIUM);
317 else if (ret != 0)
318 brcmf_err("failed with %d\n", ret);
319
320 return ret;
321 }
322
323 static int
324 brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
325 {
326 int err = 0, i;
327 u8 addr[3];
328
329 if (sdiodev->bus_if->state == BRCMF_BUS_NOMEDIUM)
330 return -ENOMEDIUM;
331
332 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
333 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
334 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
335
336 for (i = 0; i < 3; i++) {
337 err = brcmf_sdiod_regrw_helper(sdiodev,
338 SBSDIO_FUNC1_SBADDRLOW + i,
339 sizeof(u8), &addr[i], true);
340 if (err) {
341 brcmf_err("failed at addr: 0x%0x\n",
342 SBSDIO_FUNC1_SBADDRLOW + i);
343 break;
344 }
345 }
346
347 return err;
348 }
349
350 static int
351 brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr)
352 {
353 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
354 int err = 0;
355
356 if (bar0 != sdiodev->sbwad) {
357 err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
358 if (err)
359 return err;
360
361 sdiodev->sbwad = bar0;
362 }
363
364 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
365
366 if (width == 4)
367 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
368
369 return 0;
370 }
371
372 u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
373 {
374 u8 data;
375 int retval;
376
377 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
378 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
379 false);
380 brcmf_dbg(SDIO, "data:0x%02x\n", data);
381
382 if (ret)
383 *ret = retval;
384
385 return data;
386 }
387
388 u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
389 {
390 u32 data;
391 int retval;
392
393 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
394 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
395 if (retval)
396 goto done;
397 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
398 false);
399 brcmf_dbg(SDIO, "data:0x%08x\n", data);
400
401 done:
402 if (ret)
403 *ret = retval;
404
405 return data;
406 }
407
408 void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
409 u8 data, int *ret)
410 {
411 int retval;
412
413 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
414 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
415 true);
416 if (ret)
417 *ret = retval;
418 }
419
420 void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
421 u32 data, int *ret)
422 {
423 int retval;
424
425 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
426 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
427 if (retval)
428 goto done;
429 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
430 true);
431
432 done:
433 if (ret)
434 *ret = retval;
435 }
436
437 static int brcmf_sdiod_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
438 bool write, u32 addr, struct sk_buff *pkt)
439 {
440 unsigned int req_sz;
441 int err;
442
443 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
444 if (brcmf_sdiod_pm_resume_error(sdiodev))
445 return -EIO;
446
447 /* Single skb use the standard mmc interface */
448 req_sz = pkt->len + 3;
449 req_sz &= (uint)~3;
450
451 if (write)
452 err = sdio_memcpy_toio(sdiodev->func[fn], addr,
453 ((u8 *)(pkt->data)), req_sz);
454 else if (fn == 1)
455 err = sdio_memcpy_fromio(sdiodev->func[fn], ((u8 *)(pkt->data)),
456 addr, req_sz);
457 else
458 /* function 2 read is FIFO operation */
459 err = sdio_readsb(sdiodev->func[fn], ((u8 *)(pkt->data)), addr,
460 req_sz);
461 if (err == -ENOMEDIUM)
462 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_NOMEDIUM);
463 return err;
464 }
465
466 /**
467 * brcmf_sdiod_sglist_rw - SDIO interface function for block data access
468 * @sdiodev: brcmfmac sdio device
469 * @fn: SDIO function number
470 * @write: direction flag
471 * @addr: dongle memory address as source/destination
472 * @pkt: skb pointer
473 *
474 * This function takes the respbonsibility as the interface function to MMC
475 * stack for block data access. It assumes that the skb passed down by the
476 * caller has already been padded and aligned.
477 */
478 static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn,
479 bool write, u32 addr,
480 struct sk_buff_head *pktlist)
481 {
482 unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
483 unsigned int max_req_sz, orig_offset, dst_offset;
484 unsigned short max_seg_cnt, seg_sz;
485 unsigned char *pkt_data, *orig_data, *dst_data;
486 struct sk_buff *pkt_next = NULL, *local_pkt_next;
487 struct sk_buff_head local_list, *target_list;
488 struct mmc_request mmc_req;
489 struct mmc_command mmc_cmd;
490 struct mmc_data mmc_dat;
491 struct sg_table st;
492 struct scatterlist *sgl;
493 int ret = 0;
494
495 if (!pktlist->qlen)
496 return -EINVAL;
497
498 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
499 if (brcmf_sdiod_pm_resume_error(sdiodev))
500 return -EIO;
501
502 target_list = pktlist;
503 /* for host with broken sg support, prepare a page aligned list */
504 __skb_queue_head_init(&local_list);
505 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
506 req_sz = 0;
507 skb_queue_walk(pktlist, pkt_next)
508 req_sz += pkt_next->len;
509 req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize);
510 while (req_sz > PAGE_SIZE) {
511 pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE);
512 if (pkt_next == NULL) {
513 ret = -ENOMEM;
514 goto exit;
515 }
516 __skb_queue_tail(&local_list, pkt_next);
517 req_sz -= PAGE_SIZE;
518 }
519 pkt_next = brcmu_pkt_buf_get_skb(req_sz);
520 if (pkt_next == NULL) {
521 ret = -ENOMEM;
522 goto exit;
523 }
524 __skb_queue_tail(&local_list, pkt_next);
525 target_list = &local_list;
526 }
527
528 func_blk_sz = sdiodev->func[fn]->cur_blksize;
529 max_req_sz = sdiodev->max_request_size;
530 max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count,
531 target_list->qlen);
532 seg_sz = target_list->qlen;
533 pkt_offset = 0;
534 pkt_next = target_list->next;
535
536 if (sg_alloc_table(&st, max_seg_cnt, GFP_KERNEL)) {
537 ret = -ENOMEM;
538 goto exit;
539 }
540
541 memset(&mmc_req, 0, sizeof(struct mmc_request));
542 memset(&mmc_cmd, 0, sizeof(struct mmc_command));
543 memset(&mmc_dat, 0, sizeof(struct mmc_data));
544
545 mmc_dat.sg = st.sgl;
546 mmc_dat.blksz = func_blk_sz;
547 mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
548 mmc_cmd.opcode = SD_IO_RW_EXTENDED;
549 mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
550 mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
551 mmc_cmd.arg |= 1<<27; /* block mode */
552 /* for function 1 the addr will be incremented */
553 mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
554 mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
555 mmc_req.cmd = &mmc_cmd;
556 mmc_req.data = &mmc_dat;
557
558 while (seg_sz) {
559 req_sz = 0;
560 sg_cnt = 0;
561 sgl = st.sgl;
562 /* prep sg table */
563 while (pkt_next != (struct sk_buff *)target_list) {
564 pkt_data = pkt_next->data + pkt_offset;
565 sg_data_sz = pkt_next->len - pkt_offset;
566 if (sg_data_sz > sdiodev->max_segment_size)
567 sg_data_sz = sdiodev->max_segment_size;
568 if (sg_data_sz > max_req_sz - req_sz)
569 sg_data_sz = max_req_sz - req_sz;
570
571 sg_set_buf(sgl, pkt_data, sg_data_sz);
572
573 sg_cnt++;
574 sgl = sg_next(sgl);
575 req_sz += sg_data_sz;
576 pkt_offset += sg_data_sz;
577 if (pkt_offset == pkt_next->len) {
578 pkt_offset = 0;
579 pkt_next = pkt_next->next;
580 }
581
582 if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt)
583 break;
584 }
585 seg_sz -= sg_cnt;
586
587 if (req_sz % func_blk_sz != 0) {
588 brcmf_err("sg request length %u is not %u aligned\n",
589 req_sz, func_blk_sz);
590 ret = -ENOTBLK;
591 goto exit;
592 }
593
594 mmc_dat.sg_len = sg_cnt;
595 mmc_dat.blocks = req_sz / func_blk_sz;
596 mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
597 mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
598 /* incrementing addr for function 1 */
599 if (fn == 1)
600 addr += req_sz;
601
602 mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
603 mmc_wait_for_req(sdiodev->func[fn]->card->host, &mmc_req);
604
605 ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
606 if (ret == -ENOMEDIUM) {
607 brcmf_bus_change_state(sdiodev->bus_if,
608 BRCMF_BUS_NOMEDIUM);
609 break;
610 } else if (ret != 0) {
611 brcmf_err("CMD53 sg block %s failed %d\n",
612 write ? "write" : "read", ret);
613 ret = -EIO;
614 break;
615 }
616 }
617
618 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
619 local_pkt_next = local_list.next;
620 orig_offset = 0;
621 skb_queue_walk(pktlist, pkt_next) {
622 dst_offset = 0;
623 do {
624 req_sz = local_pkt_next->len - orig_offset;
625 req_sz = min_t(uint, pkt_next->len - dst_offset,
626 req_sz);
627 orig_data = local_pkt_next->data + orig_offset;
628 dst_data = pkt_next->data + dst_offset;
629 memcpy(dst_data, orig_data, req_sz);
630 orig_offset += req_sz;
631 dst_offset += req_sz;
632 if (orig_offset == local_pkt_next->len) {
633 orig_offset = 0;
634 local_pkt_next = local_pkt_next->next;
635 }
636 if (dst_offset == pkt_next->len)
637 break;
638 } while (!skb_queue_empty(&local_list));
639 }
640 }
641
642 exit:
643 sg_free_table(&st);
644 while ((pkt_next = __skb_dequeue(&local_list)) != NULL)
645 brcmu_pkt_buf_free_skb(pkt_next);
646
647 return ret;
648 }
649
650 int brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
651 {
652 struct sk_buff *mypkt;
653 int err;
654
655 mypkt = brcmu_pkt_buf_get_skb(nbytes);
656 if (!mypkt) {
657 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
658 nbytes);
659 return -EIO;
660 }
661
662 err = brcmf_sdiod_recv_pkt(sdiodev, mypkt);
663 if (!err)
664 memcpy(buf, mypkt->data, nbytes);
665
666 brcmu_pkt_buf_free_skb(mypkt);
667 return err;
668 }
669
670 int brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, struct sk_buff *pkt)
671 {
672 u32 addr = sdiodev->sbwad;
673 int err = 0;
674
675 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pkt->len);
676
677 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
678 if (err)
679 goto done;
680
681 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr, pkt);
682
683 done:
684 return err;
685 }
686
687 int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
688 struct sk_buff_head *pktq, uint totlen)
689 {
690 struct sk_buff *glom_skb;
691 struct sk_buff *skb;
692 u32 addr = sdiodev->sbwad;
693 int err = 0;
694
695 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n",
696 addr, pktq->qlen);
697
698 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
699 if (err)
700 goto done;
701
702 if (pktq->qlen == 1)
703 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
704 pktq->next);
705 else if (!sdiodev->sg_support) {
706 glom_skb = brcmu_pkt_buf_get_skb(totlen);
707 if (!glom_skb)
708 return -ENOMEM;
709 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
710 glom_skb);
711 if (err)
712 goto done;
713
714 skb_queue_walk(pktq, skb) {
715 memcpy(skb->data, glom_skb->data, skb->len);
716 skb_pull(glom_skb, skb->len);
717 }
718 } else
719 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, false, addr,
720 pktq);
721
722 done:
723 return err;
724 }
725
726 int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
727 {
728 struct sk_buff *mypkt;
729 u32 addr = sdiodev->sbwad;
730 int err;
731
732 mypkt = brcmu_pkt_buf_get_skb(nbytes);
733 if (!mypkt) {
734 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
735 nbytes);
736 return -EIO;
737 }
738
739 memcpy(mypkt->data, buf, nbytes);
740
741 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
742
743 if (!err)
744 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true, addr,
745 mypkt);
746
747 brcmu_pkt_buf_free_skb(mypkt);
748 return err;
749
750 }
751
752 int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,
753 struct sk_buff_head *pktq)
754 {
755 struct sk_buff *skb;
756 u32 addr = sdiodev->sbwad;
757 int err;
758
759 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pktq->qlen);
760
761 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
762 if (err)
763 return err;
764
765 if (pktq->qlen == 1 || !sdiodev->sg_support)
766 skb_queue_walk(pktq, skb) {
767 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true,
768 addr, skb);
769 if (err)
770 break;
771 }
772 else
773 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, true, addr,
774 pktq);
775
776 return err;
777 }
778
779 int
780 brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
781 u8 *data, uint size)
782 {
783 int bcmerror = 0;
784 struct sk_buff *pkt;
785 u32 sdaddr;
786 uint dsize;
787
788 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
789 pkt = dev_alloc_skb(dsize);
790 if (!pkt) {
791 brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
792 return -EIO;
793 }
794 pkt->priority = 0;
795
796 /* Determine initial transfer parameters */
797 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
798 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
799 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
800 else
801 dsize = size;
802
803 sdio_claim_host(sdiodev->func[1]);
804
805 /* Do the transfer(s) */
806 while (size) {
807 /* Set the backplane window to include the start address */
808 bcmerror = brcmf_sdiod_set_sbaddr_window(sdiodev, address);
809 if (bcmerror)
810 break;
811
812 brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
813 write ? "write" : "read", dsize,
814 sdaddr, address & SBSDIO_SBWINDOW_MASK);
815
816 sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
817 sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
818
819 skb_put(pkt, dsize);
820 if (write)
821 memcpy(pkt->data, data, dsize);
822 bcmerror = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_1, write,
823 sdaddr, pkt);
824 if (bcmerror) {
825 brcmf_err("membytes transfer failed\n");
826 break;
827 }
828 if (!write)
829 memcpy(data, pkt->data, dsize);
830 skb_trim(pkt, dsize);
831
832 /* Adjust for next transfer (if any) */
833 size -= dsize;
834 if (size) {
835 data += dsize;
836 address += dsize;
837 sdaddr = 0;
838 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
839 }
840 }
841
842 dev_kfree_skb(pkt);
843
844 /* Return the window to backplane enumeration space for core access */
845 if (brcmf_sdiod_set_sbaddr_window(sdiodev, sdiodev->sbwad))
846 brcmf_err("FAILED to set window back to 0x%x\n",
847 sdiodev->sbwad);
848
849 sdio_release_host(sdiodev->func[1]);
850
851 return bcmerror;
852 }
853
854 int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
855 {
856 char t_func = (char)fn;
857 brcmf_dbg(SDIO, "Enter\n");
858
859 /* issue abort cmd52 command through F0 */
860 brcmf_sdiod_request_data(sdiodev, SDIO_FUNC_0, SDIO_CCCR_ABORT,
861 sizeof(t_func), &t_func, true);
862
863 brcmf_dbg(SDIO, "Exit\n");
864 return 0;
865 }
866
867 static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev)
868 {
869 if (sdiodev->bus) {
870 brcmf_sdio_remove(sdiodev->bus);
871 sdiodev->bus = NULL;
872 }
873
874 /* Disable Function 2 */
875 sdio_claim_host(sdiodev->func[2]);
876 sdio_disable_func(sdiodev->func[2]);
877 sdio_release_host(sdiodev->func[2]);
878
879 /* Disable Function 1 */
880 sdio_claim_host(sdiodev->func[1]);
881 sdio_disable_func(sdiodev->func[1]);
882 sdio_release_host(sdiodev->func[1]);
883
884 sdiodev->sbwad = 0;
885
886 return 0;
887 }
888
889 static int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
890 {
891 struct sdio_func *func;
892 struct mmc_host *host;
893 uint max_blocks;
894 int ret = 0;
895
896 sdiodev->num_funcs = 2;
897
898 sdio_claim_host(sdiodev->func[1]);
899
900 ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
901 if (ret) {
902 brcmf_err("Failed to set F1 blocksize\n");
903 sdio_release_host(sdiodev->func[1]);
904 goto out;
905 }
906 ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
907 if (ret) {
908 brcmf_err("Failed to set F2 blocksize\n");
909 sdio_release_host(sdiodev->func[1]);
910 goto out;
911 }
912
913 /* increase F2 timeout */
914 sdiodev->func[2]->enable_timeout = SDIO_WAIT_F2RDY;
915
916 /* Enable Function 1 */
917 ret = sdio_enable_func(sdiodev->func[1]);
918 sdio_release_host(sdiodev->func[1]);
919 if (ret) {
920 brcmf_err("Failed to enable F1: err=%d\n", ret);
921 goto out;
922 }
923
924 /*
925 * determine host related variables after brcmf_sdiod_probe()
926 * as func->cur_blksize is properly set and F2 init has been
927 * completed successfully.
928 */
929 func = sdiodev->func[2];
930 host = func->card->host;
931 sdiodev->sg_support = host->max_segs > 1;
932 max_blocks = min_t(uint, host->max_blk_count, 511u);
933 sdiodev->max_request_size = min_t(uint, host->max_req_size,
934 max_blocks * func->cur_blksize);
935 sdiodev->max_segment_count = min_t(uint, host->max_segs,
936 SG_MAX_SINGLE_ALLOC);
937 sdiodev->max_segment_size = host->max_seg_size;
938
939 /* try to attach to the target device */
940 sdiodev->bus = brcmf_sdio_probe(sdiodev);
941 if (!sdiodev->bus) {
942 ret = -ENODEV;
943 goto out;
944 }
945
946 out:
947 if (ret)
948 brcmf_sdiod_remove(sdiodev);
949
950 return ret;
951 }
952
953 /* devices we support, null terminated */
954 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
955 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)},
956 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)},
957 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
958 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
959 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)},
960 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43362)},
961 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM,
962 SDIO_DEVICE_ID_BROADCOM_4335_4339)},
963 { /* end: all zeroes */ },
964 };
965 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
966
967 static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
968
969
970 static int brcmf_ops_sdio_probe(struct sdio_func *func,
971 const struct sdio_device_id *id)
972 {
973 int err;
974 struct brcmf_sdio_dev *sdiodev;
975 struct brcmf_bus *bus_if;
976
977 brcmf_dbg(SDIO, "Enter\n");
978 brcmf_dbg(SDIO, "Class=%x\n", func->class);
979 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
980 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
981 brcmf_dbg(SDIO, "Function#: %d\n", func->num);
982
983 /* Consume func num 1 but dont do anything with it. */
984 if (func->num == 1)
985 return 0;
986
987 /* Ignore anything but func 2 */
988 if (func->num != 2)
989 return -ENODEV;
990
991 bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
992 if (!bus_if)
993 return -ENOMEM;
994 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
995 if (!sdiodev) {
996 kfree(bus_if);
997 return -ENOMEM;
998 }
999
1000 /* store refs to functions used. mmc_card does
1001 * not hold the F0 function pointer.
1002 */
1003 sdiodev->func[0] = kmemdup(func, sizeof(*func), GFP_KERNEL);
1004 sdiodev->func[0]->num = 0;
1005 sdiodev->func[1] = func->card->sdio_func[0];
1006 sdiodev->func[2] = func;
1007
1008 sdiodev->bus_if = bus_if;
1009 bus_if->bus_priv.sdio = sdiodev;
1010 bus_if->proto_type = BRCMF_PROTO_BCDC;
1011 dev_set_drvdata(&func->dev, bus_if);
1012 dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
1013 sdiodev->dev = &sdiodev->func[1]->dev;
1014 sdiodev->pdata = brcmfmac_sdio_pdata;
1015
1016 atomic_set(&sdiodev->suspend, false);
1017 init_waitqueue_head(&sdiodev->request_word_wait);
1018 init_waitqueue_head(&sdiodev->request_buffer_wait);
1019
1020 brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n");
1021 err = brcmf_sdiod_probe(sdiodev);
1022 if (err) {
1023 brcmf_err("F2 error, probe failed %d...\n", err);
1024 goto fail;
1025 }
1026
1027 brcmf_dbg(SDIO, "F2 init completed...\n");
1028 return 0;
1029
1030 fail:
1031 dev_set_drvdata(&func->dev, NULL);
1032 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1033 kfree(sdiodev->func[0]);
1034 kfree(sdiodev);
1035 kfree(bus_if);
1036 return err;
1037 }
1038
1039 static void brcmf_ops_sdio_remove(struct sdio_func *func)
1040 {
1041 struct brcmf_bus *bus_if;
1042 struct brcmf_sdio_dev *sdiodev;
1043
1044 brcmf_dbg(SDIO, "Enter\n");
1045 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1046 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1047 brcmf_dbg(SDIO, "Function: %d\n", func->num);
1048
1049 if (func->num != 1 && func->num != 2)
1050 return;
1051
1052 bus_if = dev_get_drvdata(&func->dev);
1053 if (bus_if) {
1054 sdiodev = bus_if->bus_priv.sdio;
1055 brcmf_sdiod_remove(sdiodev);
1056
1057 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1058 dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
1059
1060 kfree(bus_if);
1061 kfree(sdiodev->func[0]);
1062 kfree(sdiodev);
1063 }
1064
1065 brcmf_dbg(SDIO, "Exit\n");
1066 }
1067
1068 #ifdef CONFIG_PM_SLEEP
1069 static int brcmf_ops_sdio_suspend(struct device *dev)
1070 {
1071 mmc_pm_flag_t sdio_flags;
1072 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1073 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1074 int ret = 0;
1075
1076 brcmf_dbg(SDIO, "\n");
1077
1078 atomic_set(&sdiodev->suspend, true);
1079
1080 sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
1081 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
1082 brcmf_err("Host can't keep power while suspended\n");
1083 return -EINVAL;
1084 }
1085
1086 ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
1087 if (ret) {
1088 brcmf_err("Failed to set pm_flags\n");
1089 return ret;
1090 }
1091
1092 brcmf_sdio_wd_timer(sdiodev->bus, 0);
1093
1094 return ret;
1095 }
1096
1097 static int brcmf_ops_sdio_resume(struct device *dev)
1098 {
1099 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1100 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1101
1102 brcmf_sdio_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
1103 atomic_set(&sdiodev->suspend, false);
1104 return 0;
1105 }
1106
1107 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
1108 .suspend = brcmf_ops_sdio_suspend,
1109 .resume = brcmf_ops_sdio_resume,
1110 };
1111 #endif /* CONFIG_PM_SLEEP */
1112
1113 static struct sdio_driver brcmf_sdmmc_driver = {
1114 .probe = brcmf_ops_sdio_probe,
1115 .remove = brcmf_ops_sdio_remove,
1116 .name = BRCMFMAC_SDIO_PDATA_NAME,
1117 .id_table = brcmf_sdmmc_ids,
1118 .drv = {
1119 .owner = THIS_MODULE,
1120 #ifdef CONFIG_PM_SLEEP
1121 .pm = &brcmf_sdio_pm_ops,
1122 #endif /* CONFIG_PM_SLEEP */
1123 },
1124 };
1125
1126 static int brcmf_sdio_pd_probe(struct platform_device *pdev)
1127 {
1128 brcmf_dbg(SDIO, "Enter\n");
1129
1130 brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);
1131
1132 if (brcmfmac_sdio_pdata->power_on)
1133 brcmfmac_sdio_pdata->power_on();
1134
1135 return 0;
1136 }
1137
1138 static int brcmf_sdio_pd_remove(struct platform_device *pdev)
1139 {
1140 brcmf_dbg(SDIO, "Enter\n");
1141
1142 if (brcmfmac_sdio_pdata->power_off)
1143 brcmfmac_sdio_pdata->power_off();
1144
1145 sdio_unregister_driver(&brcmf_sdmmc_driver);
1146
1147 return 0;
1148 }
1149
1150 static struct platform_driver brcmf_sdio_pd = {
1151 .remove = brcmf_sdio_pd_remove,
1152 .driver = {
1153 .name = BRCMFMAC_SDIO_PDATA_NAME,
1154 .owner = THIS_MODULE,
1155 }
1156 };
1157
1158 void brcmf_sdio_register(void)
1159 {
1160 int ret;
1161
1162 ret = sdio_register_driver(&brcmf_sdmmc_driver);
1163 if (ret)
1164 brcmf_err("sdio_register_driver failed: %d\n", ret);
1165 }
1166
1167 void brcmf_sdio_exit(void)
1168 {
1169 brcmf_dbg(SDIO, "Enter\n");
1170
1171 if (brcmfmac_sdio_pdata)
1172 platform_driver_unregister(&brcmf_sdio_pd);
1173 else
1174 sdio_unregister_driver(&brcmf_sdmmc_driver);
1175 }
1176
1177 void __init brcmf_sdio_init(void)
1178 {
1179 int ret;
1180
1181 brcmf_dbg(SDIO, "Enter\n");
1182
1183 ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
1184 if (ret == -ENODEV)
1185 brcmf_dbg(SDIO, "No platform data available.\n");
1186 }
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