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brcmfmac: clarify struct brcmf_sdio_dev::func[0] reference
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / brcm80211 / brcmfmac / bcmsdh.c
blob2b5cde67e728daa9110345549b893e4934386333
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 SDIO_VENDOR_ID_BROADCOM 0x02d0
51
52 #define DMA_ALIGN_MASK 0x03
53
54 #define SDIO_FUNC1_BLOCKSIZE 64
55 #define SDIO_FUNC2_BLOCKSIZE 512
56 /* Maximum milliseconds to wait for F2 to come up */
57 #define SDIO_WAIT_F2RDY 3000
58
59
60 static irqreturn_t brcmf_sdiod_oob_irqhandler(int irq, void *dev_id)
61 {
62 struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
63 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
64
65 brcmf_dbg(INTR, "OOB intr triggered\n");
66
67 /* out-of-band interrupt is level-triggered which won't
68 * be cleared until dpc
69 */
70 if (sdiodev->irq_en) {
71 disable_irq_nosync(irq);
72 sdiodev->irq_en = false;
73 }
74
75 brcmf_sdio_isr(sdiodev->bus);
76
77 return IRQ_HANDLED;
78 }
79
80 static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func)
81 {
82 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
83 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
84
85 brcmf_dbg(INTR, "IB intr triggered\n");
86
87 brcmf_sdio_isr(sdiodev->bus);
88 }
89
90 /* dummy handler for SDIO function 2 interrupt */
91 static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func)
92 {
93 }
94
95 static bool brcmf_sdiod_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
96 {
97 bool is_err = false;
98 #ifdef CONFIG_PM_SLEEP
99 is_err = atomic_read(&sdiodev->suspend);
100 #endif
101 return is_err;
102 }
103
104 static void brcmf_sdiod_pm_resume_wait(struct brcmf_sdio_dev *sdiodev,
105 wait_queue_head_t *wq)
106 {
107 #ifdef CONFIG_PM_SLEEP
108 int retry = 0;
109 while (atomic_read(&sdiodev->suspend) && retry++ != 30)
110 wait_event_timeout(*wq, false, HZ/100);
111 #endif
112 }
113
114 int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev)
115 {
116 int ret = 0;
117 u8 data;
118 unsigned long flags;
119
120 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
121 brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
122 sdiodev->pdata->oob_irq_nr);
123 ret = request_irq(sdiodev->pdata->oob_irq_nr,
124 brcmf_sdiod_oob_irqhandler,
125 sdiodev->pdata->oob_irq_flags,
126 "brcmf_oob_intr",
127 &sdiodev->func[1]->dev);
128 if (ret != 0) {
129 brcmf_err("request_irq failed %d\n", ret);
130 return ret;
131 }
132 sdiodev->oob_irq_requested = true;
133 spin_lock_init(&sdiodev->irq_en_lock);
134 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
135 sdiodev->irq_en = true;
136 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
137
138 ret = enable_irq_wake(sdiodev->pdata->oob_irq_nr);
139 if (ret != 0) {
140 brcmf_err("enable_irq_wake failed %d\n", ret);
141 return ret;
142 }
143 sdiodev->irq_wake = true;
144
145 sdio_claim_host(sdiodev->func[1]);
146
147 /* must configure SDIO_CCCR_IENx to enable irq */
148 data = brcmf_sdiod_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
149 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
150 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
151
152 /* redirect, configure and enable io for interrupt signal */
153 data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
154 if (sdiodev->pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
155 data |= SDIO_SEPINT_ACT_HI;
156 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
157
158 sdio_release_host(sdiodev->func[1]);
159 } else {
160 brcmf_dbg(SDIO, "Entering\n");
161 sdio_claim_host(sdiodev->func[1]);
162 sdio_claim_irq(sdiodev->func[1], brcmf_sdiod_ib_irqhandler);
163 sdio_claim_irq(sdiodev->func[2], brcmf_sdiod_dummy_irqhandler);
164 sdio_release_host(sdiodev->func[1]);
165 }
166
167 return 0;
168 }
169
170 int brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)
171 {
172 brcmf_dbg(SDIO, "Entering\n");
173
174 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
175 sdio_claim_host(sdiodev->func[1]);
176 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
177 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
178 sdio_release_host(sdiodev->func[1]);
179
180 if (sdiodev->oob_irq_requested) {
181 sdiodev->oob_irq_requested = false;
182 if (sdiodev->irq_wake) {
183 disable_irq_wake(sdiodev->pdata->oob_irq_nr);
184 sdiodev->irq_wake = false;
185 }
186 free_irq(sdiodev->pdata->oob_irq_nr,
187 &sdiodev->func[1]->dev);
188 sdiodev->irq_en = false;
189 }
190 } else {
191 sdio_claim_host(sdiodev->func[1]);
192 sdio_release_irq(sdiodev->func[2]);
193 sdio_release_irq(sdiodev->func[1]);
194 sdio_release_host(sdiodev->func[1]);
195 }
196
197 return 0;
198 }
199
200 static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func,
201 uint regaddr, u8 byte)
202 {
203 int err_ret;
204
205 /*
206 * Can only directly write to some F0 registers.
207 * Handle CCCR_IENx and CCCR_ABORT command
208 * as a special case.
209 */
210 if ((regaddr == SDIO_CCCR_ABORT) ||
211 (regaddr == SDIO_CCCR_IENx))
212 sdio_writeb(func, byte, regaddr, &err_ret);
213 else
214 sdio_f0_writeb(func, byte, regaddr, &err_ret);
215
216 return err_ret;
217 }
218
219 static int brcmf_sdiod_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw,
220 uint func, uint regaddr, u8 *byte)
221 {
222 int err_ret;
223
224 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);
225
226 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
227 if (brcmf_sdiod_pm_resume_error(sdiodev))
228 return -EIO;
229
230 if (rw && func == 0) {
231 /* handle F0 separately */
232 err_ret = brcmf_sdiod_f0_writeb(sdiodev->func[func],
233 regaddr, *byte);
234 } else {
235 if (rw) /* CMD52 Write */
236 sdio_writeb(sdiodev->func[func], *byte, regaddr,
237 &err_ret);
238 else if (func == 0) {
239 *byte = sdio_f0_readb(sdiodev->func[func], regaddr,
240 &err_ret);
241 } else {
242 *byte = sdio_readb(sdiodev->func[func], regaddr,
243 &err_ret);
244 }
245 }
246
247 if (err_ret) {
248 /*
249 * SleepCSR register access can fail when
250 * waking up the device so reduce this noise
251 * in the logs.
252 */
253 if (regaddr != SBSDIO_FUNC1_SLEEPCSR)
254 brcmf_err("Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
255 rw ? "write" : "read", func, regaddr, *byte,
256 err_ret);
257 else
258 brcmf_dbg(SDIO, "Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
259 rw ? "write" : "read", func, regaddr, *byte,
260 err_ret);
261 }
262 return err_ret;
263 }
264
265 static int brcmf_sdiod_request_word(struct brcmf_sdio_dev *sdiodev, uint rw,
266 uint func, uint addr, u32 *word,
267 uint nbytes)
268 {
269 int err_ret = -EIO;
270
271 if (func == 0) {
272 brcmf_err("Only CMD52 allowed to F0\n");
273 return -EINVAL;
274 }
275
276 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
277 rw, func, addr, nbytes);
278
279 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
280 if (brcmf_sdiod_pm_resume_error(sdiodev))
281 return -EIO;
282
283 if (rw) { /* CMD52 Write */
284 if (nbytes == 4)
285 sdio_writel(sdiodev->func[func], *word, addr,
286 &err_ret);
287 else if (nbytes == 2)
288 sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
289 addr, &err_ret);
290 else
291 brcmf_err("Invalid nbytes: %d\n", nbytes);
292 } else { /* CMD52 Read */
293 if (nbytes == 4)
294 *word = sdio_readl(sdiodev->func[func], addr, &err_ret);
295 else if (nbytes == 2)
296 *word = sdio_readw(sdiodev->func[func], addr,
297 &err_ret) & 0xFFFF;
298 else
299 brcmf_err("Invalid nbytes: %d\n", nbytes);
300 }
301
302 if (err_ret)
303 brcmf_err("Failed to %s word, Err: 0x%08x\n",
304 rw ? "write" : "read", err_ret);
305
306 return err_ret;
307 }
308
309 static int
310 brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
311 {
312 int err = 0, i;
313 u8 addr[3];
314 s32 retry;
315
316 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
317 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
318 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
319
320 for (i = 0; i < 3; i++) {
321 retry = 0;
322 do {
323 if (retry)
324 usleep_range(1000, 2000);
325 err = brcmf_sdiod_request_byte(sdiodev, SDIOH_WRITE,
326 SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
327 &addr[i]);
328 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
329
330 if (err) {
331 brcmf_err("failed at addr:0x%0x\n",
332 SBSDIO_FUNC1_SBADDRLOW + i);
333 break;
334 }
335 }
336
337 return err;
338 }
339
340 static int
341 brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr)
342 {
343 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
344 int err = 0;
345
346 if (bar0 != sdiodev->sbwad) {
347 err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
348 if (err)
349 return err;
350
351 sdiodev->sbwad = bar0;
352 }
353
354 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
355
356 if (width == 4)
357 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
358
359 return 0;
360 }
361
362 static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
363 void *data, bool write)
364 {
365 u8 func_num, reg_size;
366 s32 retry = 0;
367 int ret;
368
369 /*
370 * figure out how to read the register based on address range
371 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
372 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
373 * The rest: function 1 silicon backplane core registers
374 */
375 if ((addr & ~REG_F0_REG_MASK) == 0) {
376 func_num = SDIO_FUNC_0;
377 reg_size = 1;
378 } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
379 func_num = SDIO_FUNC_1;
380 reg_size = 1;
381 } else {
382 func_num = SDIO_FUNC_1;
383 reg_size = 4;
384
385 ret = brcmf_sdiod_addrprep(sdiodev, reg_size, &addr);
386 if (ret)
387 goto done;
388 }
389
390 do {
391 if (!write)
392 memset(data, 0, reg_size);
393 if (retry) /* wait for 1 ms till bus get settled down */
394 usleep_range(1000, 2000);
395 if (reg_size == 1)
396 ret = brcmf_sdiod_request_byte(sdiodev, write,
397 func_num, addr, data);
398 else
399 ret = brcmf_sdiod_request_word(sdiodev, write,
400 func_num, addr, data, 4);
401 } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
402
403 done:
404 if (ret != 0)
405 brcmf_err("failed with %d\n", ret);
406
407 return ret;
408 }
409
410 u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
411 {
412 u8 data;
413 int retval;
414
415 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
416 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, false);
417 brcmf_dbg(SDIO, "data:0x%02x\n", data);
418
419 if (ret)
420 *ret = retval;
421
422 return data;
423 }
424
425 u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
426 {
427 u32 data;
428 int retval;
429
430 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
431 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, false);
432 brcmf_dbg(SDIO, "data:0x%08x\n", data);
433
434 if (ret)
435 *ret = retval;
436
437 return data;
438 }
439
440 void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
441 u8 data, int *ret)
442 {
443 int retval;
444
445 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
446 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, true);
447
448 if (ret)
449 *ret = retval;
450 }
451
452 void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
453 u32 data, int *ret)
454 {
455 int retval;
456
457 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
458 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, true);
459
460 if (ret)
461 *ret = retval;
462 }
463
464 static int brcmf_sdiod_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
465 bool write, u32 addr, struct sk_buff *pkt)
466 {
467 unsigned int req_sz;
468
469 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
470 if (brcmf_sdiod_pm_resume_error(sdiodev))
471 return -EIO;
472
473 /* Single skb use the standard mmc interface */
474 req_sz = pkt->len + 3;
475 req_sz &= (uint)~3;
476
477 if (write)
478 return sdio_memcpy_toio(sdiodev->func[fn], addr,
479 ((u8 *)(pkt->data)),
480 req_sz);
481 else if (fn == 1)
482 return sdio_memcpy_fromio(sdiodev->func[fn],
483 ((u8 *)(pkt->data)),
484 addr, req_sz);
485 else
486 /* function 2 read is FIFO operation */
487 return sdio_readsb(sdiodev->func[fn],
488 ((u8 *)(pkt->data)), addr,
489 req_sz);
490 }
491
492 /**
493 * brcmf_sdiod_sglist_rw - SDIO interface function for block data access
494 * @sdiodev: brcmfmac sdio device
495 * @fn: SDIO function number
496 * @write: direction flag
497 * @addr: dongle memory address as source/destination
498 * @pkt: skb pointer
499 *
500 * This function takes the respbonsibility as the interface function to MMC
501 * stack for block data access. It assumes that the skb passed down by the
502 * caller has already been padded and aligned.
503 */
504 static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn,
505 bool write, u32 addr,
506 struct sk_buff_head *pktlist)
507 {
508 unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
509 unsigned int max_req_sz, orig_offset, dst_offset;
510 unsigned short max_seg_cnt, seg_sz;
511 unsigned char *pkt_data, *orig_data, *dst_data;
512 struct sk_buff *pkt_next = NULL, *local_pkt_next;
513 struct sk_buff_head local_list, *target_list;
514 struct mmc_request mmc_req;
515 struct mmc_command mmc_cmd;
516 struct mmc_data mmc_dat;
517 struct sg_table st;
518 struct scatterlist *sgl;
519 int ret = 0;
520
521 if (!pktlist->qlen)
522 return -EINVAL;
523
524 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
525 if (brcmf_sdiod_pm_resume_error(sdiodev))
526 return -EIO;
527
528 target_list = pktlist;
529 /* for host with broken sg support, prepare a page aligned list */
530 __skb_queue_head_init(&local_list);
531 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
532 req_sz = 0;
533 skb_queue_walk(pktlist, pkt_next)
534 req_sz += pkt_next->len;
535 req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize);
536 while (req_sz > PAGE_SIZE) {
537 pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE);
538 if (pkt_next == NULL) {
539 ret = -ENOMEM;
540 goto exit;
541 }
542 __skb_queue_tail(&local_list, pkt_next);
543 req_sz -= PAGE_SIZE;
544 }
545 pkt_next = brcmu_pkt_buf_get_skb(req_sz);
546 if (pkt_next == NULL) {
547 ret = -ENOMEM;
548 goto exit;
549 }
550 __skb_queue_tail(&local_list, pkt_next);
551 target_list = &local_list;
552 }
553
554 func_blk_sz = sdiodev->func[fn]->cur_blksize;
555 max_req_sz = sdiodev->max_request_size;
556 max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count,
557 target_list->qlen);
558 seg_sz = target_list->qlen;
559 pkt_offset = 0;
560 pkt_next = target_list->next;
561
562 if (sg_alloc_table(&st, max_seg_cnt, GFP_KERNEL)) {
563 ret = -ENOMEM;
564 goto exit;
565 }
566
567 memset(&mmc_req, 0, sizeof(struct mmc_request));
568 memset(&mmc_cmd, 0, sizeof(struct mmc_command));
569 memset(&mmc_dat, 0, sizeof(struct mmc_data));
570
571 mmc_dat.sg = st.sgl;
572 mmc_dat.blksz = func_blk_sz;
573 mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
574 mmc_cmd.opcode = SD_IO_RW_EXTENDED;
575 mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
576 mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
577 mmc_cmd.arg |= 1<<27; /* block mode */
578 /* for function 1 the addr will be incremented */
579 mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
580 mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
581 mmc_req.cmd = &mmc_cmd;
582 mmc_req.data = &mmc_dat;
583
584 while (seg_sz) {
585 req_sz = 0;
586 sg_cnt = 0;
587 sgl = st.sgl;
588 /* prep sg table */
589 while (pkt_next != (struct sk_buff *)target_list) {
590 pkt_data = pkt_next->data + pkt_offset;
591 sg_data_sz = pkt_next->len - pkt_offset;
592 if (sg_data_sz > sdiodev->max_segment_size)
593 sg_data_sz = sdiodev->max_segment_size;
594 if (sg_data_sz > max_req_sz - req_sz)
595 sg_data_sz = max_req_sz - req_sz;
596
597 sg_set_buf(sgl, pkt_data, sg_data_sz);
598
599 sg_cnt++;
600 sgl = sg_next(sgl);
601 req_sz += sg_data_sz;
602 pkt_offset += sg_data_sz;
603 if (pkt_offset == pkt_next->len) {
604 pkt_offset = 0;
605 pkt_next = pkt_next->next;
606 }
607
608 if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt)
609 break;
610 }
611 seg_sz -= sg_cnt;
612
613 if (req_sz % func_blk_sz != 0) {
614 brcmf_err("sg request length %u is not %u aligned\n",
615 req_sz, func_blk_sz);
616 ret = -ENOTBLK;
617 goto exit;
618 }
619
620 mmc_dat.sg_len = sg_cnt;
621 mmc_dat.blocks = req_sz / func_blk_sz;
622 mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
623 mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
624 /* incrementing addr for function 1 */
625 if (fn == 1)
626 addr += req_sz;
627
628 mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
629 mmc_wait_for_req(sdiodev->func[fn]->card->host, &mmc_req);
630
631 ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
632 if (ret != 0) {
633 brcmf_err("CMD53 sg block %s failed %d\n",
634 write ? "write" : "read", ret);
635 ret = -EIO;
636 break;
637 }
638 }
639
640 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
641 local_pkt_next = local_list.next;
642 orig_offset = 0;
643 skb_queue_walk(pktlist, pkt_next) {
644 dst_offset = 0;
645 do {
646 req_sz = local_pkt_next->len - orig_offset;
647 req_sz = min_t(uint, pkt_next->len - dst_offset,
648 req_sz);
649 orig_data = local_pkt_next->data + orig_offset;
650 dst_data = pkt_next->data + dst_offset;
651 memcpy(dst_data, orig_data, req_sz);
652 orig_offset += req_sz;
653 dst_offset += req_sz;
654 if (orig_offset == local_pkt_next->len) {
655 orig_offset = 0;
656 local_pkt_next = local_pkt_next->next;
657 }
658 if (dst_offset == pkt_next->len)
659 break;
660 } while (!skb_queue_empty(&local_list));
661 }
662 }
663
664 exit:
665 sg_free_table(&st);
666 while ((pkt_next = __skb_dequeue(&local_list)) != NULL)
667 brcmu_pkt_buf_free_skb(pkt_next);
668
669 return ret;
670 }
671
672 int brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
673 {
674 struct sk_buff *mypkt;
675 int err;
676
677 mypkt = brcmu_pkt_buf_get_skb(nbytes);
678 if (!mypkt) {
679 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
680 nbytes);
681 return -EIO;
682 }
683
684 err = brcmf_sdiod_recv_pkt(sdiodev, mypkt);
685 if (!err)
686 memcpy(buf, mypkt->data, nbytes);
687
688 brcmu_pkt_buf_free_skb(mypkt);
689 return err;
690 }
691
692 int brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, struct sk_buff *pkt)
693 {
694 u32 addr = sdiodev->sbwad;
695 int err = 0;
696
697 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pkt->len);
698
699 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
700 if (err)
701 goto done;
702
703 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr, pkt);
704
705 done:
706 return err;
707 }
708
709 int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
710 struct sk_buff_head *pktq, uint totlen)
711 {
712 struct sk_buff *glom_skb;
713 struct sk_buff *skb;
714 u32 addr = sdiodev->sbwad;
715 int err = 0;
716
717 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n",
718 addr, pktq->qlen);
719
720 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
721 if (err)
722 goto done;
723
724 if (pktq->qlen == 1)
725 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
726 pktq->next);
727 else if (!sdiodev->sg_support) {
728 glom_skb = brcmu_pkt_buf_get_skb(totlen);
729 if (!glom_skb)
730 return -ENOMEM;
731 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
732 glom_skb);
733 if (err)
734 goto done;
735
736 skb_queue_walk(pktq, skb) {
737 memcpy(skb->data, glom_skb->data, skb->len);
738 skb_pull(glom_skb, skb->len);
739 }
740 } else
741 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, false, addr,
742 pktq);
743
744 done:
745 return err;
746 }
747
748 int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
749 {
750 struct sk_buff *mypkt;
751 u32 addr = sdiodev->sbwad;
752 int err;
753
754 mypkt = brcmu_pkt_buf_get_skb(nbytes);
755 if (!mypkt) {
756 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
757 nbytes);
758 return -EIO;
759 }
760
761 memcpy(mypkt->data, buf, nbytes);
762
763 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
764
765 if (!err)
766 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true, addr,
767 mypkt);
768
769 brcmu_pkt_buf_free_skb(mypkt);
770 return err;
771
772 }
773
774 int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,
775 struct sk_buff_head *pktq)
776 {
777 struct sk_buff *skb;
778 u32 addr = sdiodev->sbwad;
779 int err;
780
781 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pktq->qlen);
782
783 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
784 if (err)
785 return err;
786
787 if (pktq->qlen == 1 || !sdiodev->sg_support)
788 skb_queue_walk(pktq, skb) {
789 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true,
790 addr, skb);
791 if (err)
792 break;
793 }
794 else
795 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, true, addr,
796 pktq);
797
798 return err;
799 }
800
801 int
802 brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
803 u8 *data, uint size)
804 {
805 int bcmerror = 0;
806 struct sk_buff *pkt;
807 u32 sdaddr;
808 uint dsize;
809
810 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
811 pkt = dev_alloc_skb(dsize);
812 if (!pkt) {
813 brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
814 return -EIO;
815 }
816 pkt->priority = 0;
817
818 /* Determine initial transfer parameters */
819 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
820 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
821 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
822 else
823 dsize = size;
824
825 sdio_claim_host(sdiodev->func[1]);
826
827 /* Do the transfer(s) */
828 while (size) {
829 /* Set the backplane window to include the start address */
830 bcmerror = brcmf_sdiod_set_sbaddr_window(sdiodev, address);
831 if (bcmerror)
832 break;
833
834 brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
835 write ? "write" : "read", dsize,
836 sdaddr, address & SBSDIO_SBWINDOW_MASK);
837
838 sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
839 sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
840
841 skb_put(pkt, dsize);
842 if (write)
843 memcpy(pkt->data, data, dsize);
844 bcmerror = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_1, write,
845 sdaddr, pkt);
846 if (bcmerror) {
847 brcmf_err("membytes transfer failed\n");
848 break;
849 }
850 if (!write)
851 memcpy(data, pkt->data, dsize);
852 skb_trim(pkt, dsize);
853
854 /* Adjust for next transfer (if any) */
855 size -= dsize;
856 if (size) {
857 data += dsize;
858 address += dsize;
859 sdaddr = 0;
860 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
861 }
862 }
863
864 dev_kfree_skb(pkt);
865
866 /* Return the window to backplane enumeration space for core access */
867 if (brcmf_sdiod_set_sbaddr_window(sdiodev, sdiodev->sbwad))
868 brcmf_err("FAILED to set window back to 0x%x\n",
869 sdiodev->sbwad);
870
871 sdio_release_host(sdiodev->func[1]);
872
873 return bcmerror;
874 }
875
876 int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
877 {
878 char t_func = (char)fn;
879 brcmf_dbg(SDIO, "Enter\n");
880
881 /* issue abort cmd52 command through F0 */
882 brcmf_sdiod_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
883 SDIO_CCCR_ABORT, &t_func);
884
885 brcmf_dbg(SDIO, "Exit\n");
886 return 0;
887 }
888
889 static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev)
890 {
891 sdiodev->bus_if->state = BRCMF_BUS_DOWN;
892
893 if (sdiodev->bus) {
894 brcmf_sdio_remove(sdiodev->bus);
895 sdiodev->bus = NULL;
896 }
897
898 /* Disable Function 2 */
899 sdio_claim_host(sdiodev->func[2]);
900 sdio_disable_func(sdiodev->func[2]);
901 sdio_release_host(sdiodev->func[2]);
902
903 /* Disable Function 1 */
904 sdio_claim_host(sdiodev->func[1]);
905 sdio_disable_func(sdiodev->func[1]);
906 sdio_release_host(sdiodev->func[1]);
907
908 sdiodev->sbwad = 0;
909
910 return 0;
911 }
912
913 static int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
914 {
915 struct sdio_func *func;
916 struct mmc_host *host;
917 uint max_blocks;
918 int ret = 0;
919
920 sdiodev->num_funcs = 2;
921
922 sdio_claim_host(sdiodev->func[1]);
923
924 ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
925 if (ret) {
926 brcmf_err("Failed to set F1 blocksize\n");
927 sdio_release_host(sdiodev->func[1]);
928 goto out;
929 }
930 ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
931 if (ret) {
932 brcmf_err("Failed to set F2 blocksize\n");
933 sdio_release_host(sdiodev->func[1]);
934 goto out;
935 }
936
937 /* increase F2 timeout */
938 sdiodev->func[2]->enable_timeout = SDIO_WAIT_F2RDY;
939
940 /* Enable Function 1 */
941 ret = sdio_enable_func(sdiodev->func[1]);
942 sdio_release_host(sdiodev->func[1]);
943 if (ret) {
944 brcmf_err("Failed to enable F1: err=%d\n", ret);
945 goto out;
946 }
947
948 /*
949 * determine host related variables after brcmf_sdiod_probe()
950 * as func->cur_blksize is properly set and F2 init has been
951 * completed successfully.
952 */
953 func = sdiodev->func[2];
954 host = func->card->host;
955 sdiodev->sg_support = host->max_segs > 1;
956 max_blocks = min_t(uint, host->max_blk_count, 511u);
957 sdiodev->max_request_size = min_t(uint, host->max_req_size,
958 max_blocks * func->cur_blksize);
959 sdiodev->max_segment_count = min_t(uint, host->max_segs,
960 SG_MAX_SINGLE_ALLOC);
961 sdiodev->max_segment_size = host->max_seg_size;
962
963 /* try to attach to the target device */
964 sdiodev->bus = brcmf_sdio_probe(sdiodev);
965 if (!sdiodev->bus) {
966 ret = -ENODEV;
967 goto out;
968 }
969
970 out:
971 if (ret)
972 brcmf_sdiod_remove(sdiodev);
973
974 return ret;
975 }
976
977 /* devices we support, null terminated */
978 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
979 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)},
980 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)},
981 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
982 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
983 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)},
984 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM,
985 SDIO_DEVICE_ID_BROADCOM_4335_4339)},
986 { /* end: all zeroes */ },
987 };
988 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
989
990 static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
991
992
993 static int brcmf_ops_sdio_probe(struct sdio_func *func,
994 const struct sdio_device_id *id)
995 {
996 int err;
997 struct brcmf_sdio_dev *sdiodev;
998 struct brcmf_bus *bus_if;
999
1000 brcmf_dbg(SDIO, "Enter\n");
1001 brcmf_dbg(SDIO, "Class=%x\n", func->class);
1002 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1003 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1004 brcmf_dbg(SDIO, "Function#: %d\n", func->num);
1005
1006 /* Consume func num 1 but dont do anything with it. */
1007 if (func->num == 1)
1008 return 0;
1009
1010 /* Ignore anything but func 2 */
1011 if (func->num != 2)
1012 return -ENODEV;
1013
1014 bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
1015 if (!bus_if)
1016 return -ENOMEM;
1017 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
1018 if (!sdiodev) {
1019 kfree(bus_if);
1020 return -ENOMEM;
1021 }
1022
1023 /* store refs to functions used. mmc_card does
1024 * not hold the F0 function pointer.
1025 */
1026 sdiodev->func[0] = kmemdup(func, sizeof(*func), GFP_KERNEL);
1027 sdiodev->func[0]->num = 0;
1028 sdiodev->func[1] = func->card->sdio_func[0];
1029 sdiodev->func[2] = func;
1030
1031 sdiodev->bus_if = bus_if;
1032 bus_if->bus_priv.sdio = sdiodev;
1033 bus_if->proto_type = BRCMF_PROTO_BCDC;
1034 dev_set_drvdata(&func->dev, bus_if);
1035 dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
1036 sdiodev->dev = &sdiodev->func[1]->dev;
1037 sdiodev->pdata = brcmfmac_sdio_pdata;
1038
1039 atomic_set(&sdiodev->suspend, false);
1040 init_waitqueue_head(&sdiodev->request_byte_wait);
1041 init_waitqueue_head(&sdiodev->request_word_wait);
1042 init_waitqueue_head(&sdiodev->request_buffer_wait);
1043
1044 brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n");
1045 err = brcmf_sdiod_probe(sdiodev);
1046 if (err) {
1047 brcmf_err("F2 error, probe failed %d...\n", err);
1048 goto fail;
1049 }
1050
1051 brcmf_dbg(SDIO, "F2 init completed...\n");
1052 return 0;
1053
1054 fail:
1055 dev_set_drvdata(&func->dev, NULL);
1056 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1057 kfree(sdiodev->func[0]);
1058 kfree(sdiodev);
1059 kfree(bus_if);
1060 return err;
1061 }
1062
1063 static void brcmf_ops_sdio_remove(struct sdio_func *func)
1064 {
1065 struct brcmf_bus *bus_if;
1066 struct brcmf_sdio_dev *sdiodev;
1067
1068 brcmf_dbg(SDIO, "Enter\n");
1069 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1070 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1071 brcmf_dbg(SDIO, "Function: %d\n", func->num);
1072
1073 if (func->num != 1 && func->num != 2)
1074 return;
1075
1076 bus_if = dev_get_drvdata(&func->dev);
1077 if (bus_if) {
1078 sdiodev = bus_if->bus_priv.sdio;
1079 brcmf_sdiod_remove(sdiodev);
1080
1081 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1082 dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
1083
1084 kfree(bus_if);
1085 kfree(sdiodev->func[0]);
1086 kfree(sdiodev);
1087 }
1088
1089 brcmf_dbg(SDIO, "Exit\n");
1090 }
1091
1092 #ifdef CONFIG_PM_SLEEP
1093 static int brcmf_ops_sdio_suspend(struct device *dev)
1094 {
1095 mmc_pm_flag_t sdio_flags;
1096 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1097 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1098 int ret = 0;
1099
1100 brcmf_dbg(SDIO, "\n");
1101
1102 atomic_set(&sdiodev->suspend, true);
1103
1104 sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
1105 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
1106 brcmf_err("Host can't keep power while suspended\n");
1107 return -EINVAL;
1108 }
1109
1110 ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
1111 if (ret) {
1112 brcmf_err("Failed to set pm_flags\n");
1113 return ret;
1114 }
1115
1116 brcmf_sdio_wd_timer(sdiodev->bus, 0);
1117
1118 return ret;
1119 }
1120
1121 static int brcmf_ops_sdio_resume(struct device *dev)
1122 {
1123 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1124 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1125
1126 brcmf_sdio_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
1127 atomic_set(&sdiodev->suspend, false);
1128 return 0;
1129 }
1130
1131 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
1132 .suspend = brcmf_ops_sdio_suspend,
1133 .resume = brcmf_ops_sdio_resume,
1134 };
1135 #endif /* CONFIG_PM_SLEEP */
1136
1137 static struct sdio_driver brcmf_sdmmc_driver = {
1138 .probe = brcmf_ops_sdio_probe,
1139 .remove = brcmf_ops_sdio_remove,
1140 .name = BRCMFMAC_SDIO_PDATA_NAME,
1141 .id_table = brcmf_sdmmc_ids,
1142 #ifdef CONFIG_PM_SLEEP
1143 .drv = {
1144 .pm = &brcmf_sdio_pm_ops,
1145 },
1146 #endif /* CONFIG_PM_SLEEP */
1147 };
1148
1149 static int brcmf_sdio_pd_probe(struct platform_device *pdev)
1150 {
1151 brcmf_dbg(SDIO, "Enter\n");
1152
1153 brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);
1154
1155 if (brcmfmac_sdio_pdata->power_on)
1156 brcmfmac_sdio_pdata->power_on();
1157
1158 return 0;
1159 }
1160
1161 static int brcmf_sdio_pd_remove(struct platform_device *pdev)
1162 {
1163 brcmf_dbg(SDIO, "Enter\n");
1164
1165 if (brcmfmac_sdio_pdata->power_off)
1166 brcmfmac_sdio_pdata->power_off();
1167
1168 sdio_unregister_driver(&brcmf_sdmmc_driver);
1169
1170 return 0;
1171 }
1172
1173 static struct platform_driver brcmf_sdio_pd = {
1174 .remove = brcmf_sdio_pd_remove,
1175 .driver = {
1176 .name = BRCMFMAC_SDIO_PDATA_NAME,
1177 .owner = THIS_MODULE,
1178 }
1179 };
1180
1181 void brcmf_sdio_register(void)
1182 {
1183 int ret;
1184
1185 ret = sdio_register_driver(&brcmf_sdmmc_driver);
1186 if (ret)
1187 brcmf_err("sdio_register_driver failed: %d\n", ret);
1188 }
1189
1190 void brcmf_sdio_exit(void)
1191 {
1192 brcmf_dbg(SDIO, "Enter\n");
1193
1194 if (brcmfmac_sdio_pdata)
1195 platform_driver_unregister(&brcmf_sdio_pd);
1196 else
1197 sdio_unregister_driver(&brcmf_sdmmc_driver);
1198 }
1199
1200 void __init brcmf_sdio_init(void)
1201 {
1202 int ret;
1203
1204 brcmf_dbg(SDIO, "Enter\n");
1205
1206 ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
1207 if (ret == -ENODEV)
1208 brcmf_dbg(SDIO, "No platform data available.\n");
1209 }
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