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981ca9277117c486fd8e774ca6516c3827f28c9d
[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/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_sdbrcm_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_sdbrcm_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_write_byte(struct brcmf_sdio_dev *sdiodev,
201 uint regaddr, u8 *byte)
202 {
203 struct sdio_func *sdfunc = sdiodev->func[0];
204 int err_ret;
205
206 /*
207 * Can only directly write to some F0 registers.
208 * Handle F2 enable/disable and Abort command
209 * as a special case.
210 */
211 if ((regaddr == SDIO_CCCR_ABORT) ||
212 (regaddr == SDIO_CCCR_IENx)) {
213 sdfunc = kmemdup(sdiodev->func[0], sizeof(struct sdio_func),
214 GFP_KERNEL);
215 if (!sdfunc)
216 return -ENOMEM;
217 sdfunc->num = 0;
218 sdio_writeb(sdfunc, *byte, regaddr, &err_ret);
219 kfree(sdfunc);
220 } else if (regaddr < 0xF0) {
221 brcmf_err("F0 Wr:0x%02x: write disallowed\n", regaddr);
222 err_ret = -EPERM;
223 } else {
224 sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret);
225 }
226
227 return err_ret;
228 }
229
230 static int brcmf_sdiod_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw,
231 uint func, uint regaddr, u8 *byte)
232 {
233 int err_ret;
234
235 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);
236
237 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
238 if (brcmf_sdiod_pm_resume_error(sdiodev))
239 return -EIO;
240
241 if (rw && func == 0) {
242 /* handle F0 separately */
243 err_ret = brcmf_sdiod_f0_write_byte(sdiodev, regaddr, byte);
244 } else {
245 if (rw) /* CMD52 Write */
246 sdio_writeb(sdiodev->func[func], *byte, regaddr,
247 &err_ret);
248 else if (func == 0) {
249 *byte = sdio_f0_readb(sdiodev->func[func], regaddr,
250 &err_ret);
251 } else {
252 *byte = sdio_readb(sdiodev->func[func], regaddr,
253 &err_ret);
254 }
255 }
256
257 if (err_ret) {
258 /*
259 * SleepCSR register access can fail when
260 * waking up the device so reduce this noise
261 * in the logs.
262 */
263 if (regaddr != SBSDIO_FUNC1_SLEEPCSR)
264 brcmf_err("Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
265 rw ? "write" : "read", func, regaddr, *byte,
266 err_ret);
267 else
268 brcmf_dbg(SDIO, "Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
269 rw ? "write" : "read", func, regaddr, *byte,
270 err_ret);
271 }
272 return err_ret;
273 }
274
275 static int brcmf_sdiod_request_word(struct brcmf_sdio_dev *sdiodev, uint rw,
276 uint func, uint addr, u32 *word,
277 uint nbytes)
278 {
279 int err_ret = -EIO;
280
281 if (func == 0) {
282 brcmf_err("Only CMD52 allowed to F0\n");
283 return -EINVAL;
284 }
285
286 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
287 rw, func, addr, nbytes);
288
289 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
290 if (brcmf_sdiod_pm_resume_error(sdiodev))
291 return -EIO;
292
293 if (rw) { /* CMD52 Write */
294 if (nbytes == 4)
295 sdio_writel(sdiodev->func[func], *word, addr,
296 &err_ret);
297 else if (nbytes == 2)
298 sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
299 addr, &err_ret);
300 else
301 brcmf_err("Invalid nbytes: %d\n", nbytes);
302 } else { /* CMD52 Read */
303 if (nbytes == 4)
304 *word = sdio_readl(sdiodev->func[func], addr, &err_ret);
305 else if (nbytes == 2)
306 *word = sdio_readw(sdiodev->func[func], addr,
307 &err_ret) & 0xFFFF;
308 else
309 brcmf_err("Invalid nbytes: %d\n", nbytes);
310 }
311
312 if (err_ret)
313 brcmf_err("Failed to %s word, Err: 0x%08x\n",
314 rw ? "write" : "read", err_ret);
315
316 return err_ret;
317 }
318
319 static int
320 brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
321 {
322 int err = 0, i;
323 u8 addr[3];
324 s32 retry;
325
326 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
327 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
328 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
329
330 for (i = 0; i < 3; i++) {
331 retry = 0;
332 do {
333 if (retry)
334 usleep_range(1000, 2000);
335 err = brcmf_sdiod_request_byte(sdiodev, SDIOH_WRITE,
336 SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
337 &addr[i]);
338 } while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
339
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 static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
373 void *data, bool write)
374 {
375 u8 func_num, reg_size;
376 s32 retry = 0;
377 int ret;
378
379 /*
380 * figure out how to read the register based on address range
381 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
382 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
383 * The rest: function 1 silicon backplane core registers
384 */
385 if ((addr & ~REG_F0_REG_MASK) == 0) {
386 func_num = SDIO_FUNC_0;
387 reg_size = 1;
388 } else if ((addr & ~REG_F1_MISC_MASK) == 0) {
389 func_num = SDIO_FUNC_1;
390 reg_size = 1;
391 } else {
392 func_num = SDIO_FUNC_1;
393 reg_size = 4;
394
395 ret = brcmf_sdiod_addrprep(sdiodev, reg_size, &addr);
396 if (ret)
397 goto done;
398 }
399
400 do {
401 if (!write)
402 memset(data, 0, reg_size);
403 if (retry) /* wait for 1 ms till bus get settled down */
404 usleep_range(1000, 2000);
405 if (reg_size == 1)
406 ret = brcmf_sdiod_request_byte(sdiodev, write,
407 func_num, addr, data);
408 else
409 ret = brcmf_sdiod_request_word(sdiodev, write,
410 func_num, addr, data, 4);
411 } while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
412
413 done:
414 if (ret != 0)
415 brcmf_err("failed with %d\n", ret);
416
417 return ret;
418 }
419
420 u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
421 {
422 u8 data;
423 int retval;
424
425 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
426 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, false);
427 brcmf_dbg(SDIO, "data:0x%02x\n", data);
428
429 if (ret)
430 *ret = retval;
431
432 return data;
433 }
434
435 u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
436 {
437 u32 data;
438 int retval;
439
440 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
441 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, false);
442 brcmf_dbg(SDIO, "data:0x%08x\n", data);
443
444 if (ret)
445 *ret = retval;
446
447 return data;
448 }
449
450 void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
451 u8 data, int *ret)
452 {
453 int retval;
454
455 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
456 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, true);
457
458 if (ret)
459 *ret = retval;
460 }
461
462 void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
463 u32 data, int *ret)
464 {
465 int retval;
466
467 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
468 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, &data, true);
469
470 if (ret)
471 *ret = retval;
472 }
473
474 static int brcmf_sdiod_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
475 bool write, u32 addr, struct sk_buff *pkt)
476 {
477 unsigned int req_sz;
478
479 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
480 if (brcmf_sdiod_pm_resume_error(sdiodev))
481 return -EIO;
482
483 /* Single skb use the standard mmc interface */
484 req_sz = pkt->len + 3;
485 req_sz &= (uint)~3;
486
487 if (write)
488 return sdio_memcpy_toio(sdiodev->func[fn], addr,
489 ((u8 *)(pkt->data)),
490 req_sz);
491 else if (fn == 1)
492 return sdio_memcpy_fromio(sdiodev->func[fn],
493 ((u8 *)(pkt->data)),
494 addr, req_sz);
495 else
496 /* function 2 read is FIFO operation */
497 return sdio_readsb(sdiodev->func[fn],
498 ((u8 *)(pkt->data)), addr,
499 req_sz);
500 }
501
502 /**
503 * brcmf_sdiod_sglist_rw - SDIO interface function for block data access
504 * @sdiodev: brcmfmac sdio device
505 * @fn: SDIO function number
506 * @write: direction flag
507 * @addr: dongle memory address as source/destination
508 * @pkt: skb pointer
509 *
510 * This function takes the respbonsibility as the interface function to MMC
511 * stack for block data access. It assumes that the skb passed down by the
512 * caller has already been padded and aligned.
513 */
514 static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn,
515 bool write, u32 addr,
516 struct sk_buff_head *pktlist)
517 {
518 unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
519 unsigned int max_req_sz, orig_offset, dst_offset;
520 unsigned short max_seg_cnt, seg_sz;
521 unsigned char *pkt_data, *orig_data, *dst_data;
522 struct sk_buff *pkt_next = NULL, *local_pkt_next;
523 struct sk_buff_head local_list, *target_list;
524 struct mmc_request mmc_req;
525 struct mmc_command mmc_cmd;
526 struct mmc_data mmc_dat;
527 struct sg_table st;
528 struct scatterlist *sgl;
529 int ret = 0;
530
531 if (!pktlist->qlen)
532 return -EINVAL;
533
534 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
535 if (brcmf_sdiod_pm_resume_error(sdiodev))
536 return -EIO;
537
538 target_list = pktlist;
539 /* for host with broken sg support, prepare a page aligned list */
540 __skb_queue_head_init(&local_list);
541 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
542 req_sz = 0;
543 skb_queue_walk(pktlist, pkt_next)
544 req_sz += pkt_next->len;
545 req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize);
546 while (req_sz > PAGE_SIZE) {
547 pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE);
548 if (pkt_next == NULL) {
549 ret = -ENOMEM;
550 goto exit;
551 }
552 __skb_queue_tail(&local_list, pkt_next);
553 req_sz -= PAGE_SIZE;
554 }
555 pkt_next = brcmu_pkt_buf_get_skb(req_sz);
556 if (pkt_next == NULL) {
557 ret = -ENOMEM;
558 goto exit;
559 }
560 __skb_queue_tail(&local_list, pkt_next);
561 target_list = &local_list;
562 }
563
564 func_blk_sz = sdiodev->func[fn]->cur_blksize;
565 max_req_sz = sdiodev->max_request_size;
566 max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count,
567 target_list->qlen);
568 seg_sz = target_list->qlen;
569 pkt_offset = 0;
570 pkt_next = target_list->next;
571
572 if (sg_alloc_table(&st, max_seg_cnt, GFP_KERNEL)) {
573 ret = -ENOMEM;
574 goto exit;
575 }
576
577 memset(&mmc_req, 0, sizeof(struct mmc_request));
578 memset(&mmc_cmd, 0, sizeof(struct mmc_command));
579 memset(&mmc_dat, 0, sizeof(struct mmc_data));
580
581 mmc_dat.sg = st.sgl;
582 mmc_dat.blksz = func_blk_sz;
583 mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
584 mmc_cmd.opcode = SD_IO_RW_EXTENDED;
585 mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
586 mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
587 mmc_cmd.arg |= 1<<27; /* block mode */
588 /* for function 1 the addr will be incremented */
589 mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
590 mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
591 mmc_req.cmd = &mmc_cmd;
592 mmc_req.data = &mmc_dat;
593
594 while (seg_sz) {
595 req_sz = 0;
596 sg_cnt = 0;
597 sgl = st.sgl;
598 /* prep sg table */
599 while (pkt_next != (struct sk_buff *)target_list) {
600 pkt_data = pkt_next->data + pkt_offset;
601 sg_data_sz = pkt_next->len - pkt_offset;
602 if (sg_data_sz > sdiodev->max_segment_size)
603 sg_data_sz = sdiodev->max_segment_size;
604 if (sg_data_sz > max_req_sz - req_sz)
605 sg_data_sz = max_req_sz - req_sz;
606
607 sg_set_buf(sgl, pkt_data, sg_data_sz);
608
609 sg_cnt++;
610 sgl = sg_next(sgl);
611 req_sz += sg_data_sz;
612 pkt_offset += sg_data_sz;
613 if (pkt_offset == pkt_next->len) {
614 pkt_offset = 0;
615 pkt_next = pkt_next->next;
616 }
617
618 if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt)
619 break;
620 }
621 seg_sz -= sg_cnt;
622
623 if (req_sz % func_blk_sz != 0) {
624 brcmf_err("sg request length %u is not %u aligned\n",
625 req_sz, func_blk_sz);
626 ret = -ENOTBLK;
627 goto exit;
628 }
629
630 mmc_dat.sg_len = sg_cnt;
631 mmc_dat.blocks = req_sz / func_blk_sz;
632 mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
633 mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
634 /* incrementing addr for function 1 */
635 if (fn == 1)
636 addr += req_sz;
637
638 mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
639 mmc_wait_for_req(sdiodev->func[fn]->card->host, &mmc_req);
640
641 ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
642 if (ret != 0) {
643 brcmf_err("CMD53 sg block %s failed %d\n",
644 write ? "write" : "read", ret);
645 ret = -EIO;
646 break;
647 }
648 }
649
650 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
651 local_pkt_next = local_list.next;
652 orig_offset = 0;
653 skb_queue_walk(pktlist, pkt_next) {
654 dst_offset = 0;
655 do {
656 req_sz = local_pkt_next->len - orig_offset;
657 req_sz = min_t(uint, pkt_next->len - dst_offset,
658 req_sz);
659 orig_data = local_pkt_next->data + orig_offset;
660 dst_data = pkt_next->data + dst_offset;
661 memcpy(dst_data, orig_data, req_sz);
662 orig_offset += req_sz;
663 dst_offset += req_sz;
664 if (orig_offset == local_pkt_next->len) {
665 orig_offset = 0;
666 local_pkt_next = local_pkt_next->next;
667 }
668 if (dst_offset == pkt_next->len)
669 break;
670 } while (!skb_queue_empty(&local_list));
671 }
672 }
673
674 exit:
675 sg_free_table(&st);
676 while ((pkt_next = __skb_dequeue(&local_list)) != NULL)
677 brcmu_pkt_buf_free_skb(pkt_next);
678
679 return ret;
680 }
681
682 int
683 brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
684 uint flags, u8 *buf, uint nbytes)
685 {
686 struct sk_buff *mypkt;
687 int err;
688
689 mypkt = brcmu_pkt_buf_get_skb(nbytes);
690 if (!mypkt) {
691 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
692 nbytes);
693 return -EIO;
694 }
695
696 err = brcmf_sdiod_recv_pkt(sdiodev, addr, fn, flags, mypkt);
697 if (!err)
698 memcpy(buf, mypkt->data, nbytes);
699
700 brcmu_pkt_buf_free_skb(mypkt);
701 return err;
702 }
703
704 int
705 brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
706 uint flags, struct sk_buff *pkt)
707 {
708 uint width;
709 int err = 0;
710
711 brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
712 fn, addr, pkt->len);
713
714 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
715 err = brcmf_sdiod_addrprep(sdiodev, width, &addr);
716 if (err)
717 goto done;
718
719 err = brcmf_sdiod_buffrw(sdiodev, fn, false, addr, pkt);
720
721 done:
722 return err;
723 }
724
725 int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
726 uint flags, struct sk_buff_head *pktq, uint totlen)
727 {
728 struct sk_buff *glom_skb;
729 struct sk_buff *skb;
730 uint width;
731 int err = 0;
732
733 brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
734 fn, addr, pktq->qlen);
735
736 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
737 err = brcmf_sdiod_addrprep(sdiodev, width, &addr);
738 if (err)
739 goto done;
740
741 if (pktq->qlen == 1)
742 err = brcmf_sdiod_buffrw(sdiodev, fn, false, addr, pktq->next);
743 else if (!sdiodev->sg_support) {
744 glom_skb = brcmu_pkt_buf_get_skb(totlen);
745 if (!glom_skb)
746 return -ENOMEM;
747 err = brcmf_sdiod_buffrw(sdiodev, fn, false, addr, glom_skb);
748 if (err)
749 goto done;
750
751 skb_queue_walk(pktq, skb) {
752 memcpy(skb->data, glom_skb->data, skb->len);
753 skb_pull(glom_skb, skb->len);
754 }
755 } else
756 err = brcmf_sdiod_sglist_rw(sdiodev, fn, false, addr, pktq);
757
758 done:
759 return err;
760 }
761
762 int
763 brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
764 uint flags, u8 *buf, uint nbytes)
765 {
766 struct sk_buff *mypkt;
767 uint width;
768 int err;
769
770 mypkt = brcmu_pkt_buf_get_skb(nbytes);
771 if (!mypkt) {
772 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
773 nbytes);
774 return -EIO;
775 }
776
777 memcpy(mypkt->data, buf, nbytes);
778
779 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
780 err = brcmf_sdiod_addrprep(sdiodev, width, &addr);
781
782 if (!err)
783 err = brcmf_sdiod_buffrw(sdiodev, fn, true, addr, mypkt);
784
785 brcmu_pkt_buf_free_skb(mypkt);
786 return err;
787
788 }
789
790 int
791 brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
792 uint flags, struct sk_buff_head *pktq)
793 {
794 struct sk_buff *skb;
795 uint width;
796 int err;
797
798 brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
799 fn, addr, pktq->qlen);
800
801 width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
802 err = brcmf_sdiod_addrprep(sdiodev, width, &addr);
803 if (err)
804 return err;
805
806 if (pktq->qlen == 1 || !sdiodev->sg_support)
807 skb_queue_walk(pktq, skb) {
808 err = brcmf_sdiod_buffrw(sdiodev, fn, true, addr, skb);
809 if (err)
810 break;
811 }
812 else
813 err = brcmf_sdiod_sglist_rw(sdiodev, fn, true, addr, pktq);
814
815 return err;
816 }
817
818 int
819 brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
820 u8 *data, uint size)
821 {
822 int bcmerror = 0;
823 struct sk_buff *pkt;
824 u32 sdaddr;
825 uint dsize;
826
827 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
828 pkt = dev_alloc_skb(dsize);
829 if (!pkt) {
830 brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
831 return -EIO;
832 }
833 pkt->priority = 0;
834
835 /* Determine initial transfer parameters */
836 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
837 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
838 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
839 else
840 dsize = size;
841
842 sdio_claim_host(sdiodev->func[1]);
843
844 /* Do the transfer(s) */
845 while (size) {
846 /* Set the backplane window to include the start address */
847 bcmerror = brcmf_sdiod_set_sbaddr_window(sdiodev, address);
848 if (bcmerror)
849 break;
850
851 brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
852 write ? "write" : "read", dsize,
853 sdaddr, address & SBSDIO_SBWINDOW_MASK);
854
855 sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
856 sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
857
858 skb_put(pkt, dsize);
859 if (write)
860 memcpy(pkt->data, data, dsize);
861 bcmerror = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_1, write,
862 sdaddr, pkt);
863 if (bcmerror) {
864 brcmf_err("membytes transfer failed\n");
865 break;
866 }
867 if (!write)
868 memcpy(data, pkt->data, dsize);
869 skb_trim(pkt, dsize);
870
871 /* Adjust for next transfer (if any) */
872 size -= dsize;
873 if (size) {
874 data += dsize;
875 address += dsize;
876 sdaddr = 0;
877 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
878 }
879 }
880
881 dev_kfree_skb(pkt);
882
883 /* Return the window to backplane enumeration space for core access */
884 if (brcmf_sdiod_set_sbaddr_window(sdiodev, sdiodev->sbwad))
885 brcmf_err("FAILED to set window back to 0x%x\n",
886 sdiodev->sbwad);
887
888 sdio_release_host(sdiodev->func[1]);
889
890 return bcmerror;
891 }
892
893 int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
894 {
895 char t_func = (char)fn;
896 brcmf_dbg(SDIO, "Enter\n");
897
898 /* issue abort cmd52 command through F0 */
899 brcmf_sdiod_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
900 SDIO_CCCR_ABORT, &t_func);
901
902 brcmf_dbg(SDIO, "Exit\n");
903 return 0;
904 }
905
906 static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev)
907 {
908 sdiodev->bus_if->state = BRCMF_BUS_DOWN;
909
910 if (sdiodev->bus) {
911 brcmf_sdbrcm_disconnect(sdiodev->bus);
912 sdiodev->bus = NULL;
913 }
914
915 /* Disable Function 2 */
916 sdio_claim_host(sdiodev->func[2]);
917 sdio_disable_func(sdiodev->func[2]);
918 sdio_release_host(sdiodev->func[2]);
919
920 /* Disable Function 1 */
921 sdio_claim_host(sdiodev->func[1]);
922 sdio_disable_func(sdiodev->func[1]);
923 sdio_release_host(sdiodev->func[1]);
924
925 sdiodev->sbwad = 0;
926
927 return 0;
928 }
929
930 static int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
931 {
932 struct sdio_func *func;
933 struct mmc_host *host;
934 uint max_blocks;
935 int ret = 0;
936
937 sdiodev->num_funcs = 2;
938
939 sdio_claim_host(sdiodev->func[1]);
940
941 ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
942 if (ret) {
943 brcmf_err("Failed to set F1 blocksize\n");
944 sdio_release_host(sdiodev->func[1]);
945 goto out;
946 }
947 ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
948 if (ret) {
949 brcmf_err("Failed to set F2 blocksize\n");
950 sdio_release_host(sdiodev->func[1]);
951 goto out;
952 }
953
954 /* increase F2 timeout */
955 sdiodev->func[2]->enable_timeout = SDIO_WAIT_F2RDY;
956
957 /* Enable Function 1 */
958 ret = sdio_enable_func(sdiodev->func[1]);
959 sdio_release_host(sdiodev->func[1]);
960 if (ret) {
961 brcmf_err("Failed to enable F1: err=%d\n", ret);
962 goto out;
963 }
964
965 /*
966 * determine host related variables after brcmf_sdiod_probe()
967 * as func->cur_blksize is properly set and F2 init has been
968 * completed successfully.
969 */
970 func = sdiodev->func[2];
971 host = func->card->host;
972 sdiodev->sg_support = host->max_segs > 1;
973 max_blocks = min_t(uint, host->max_blk_count, 511u);
974 sdiodev->max_request_size = min_t(uint, host->max_req_size,
975 max_blocks * func->cur_blksize);
976 sdiodev->max_segment_count = min_t(uint, host->max_segs,
977 SG_MAX_SINGLE_ALLOC);
978 sdiodev->max_segment_size = host->max_seg_size;
979
980 /* try to attach to the target device */
981 sdiodev->bus = brcmf_sdbrcm_probe(sdiodev);
982 if (!sdiodev->bus) {
983 ret = -ENODEV;
984 goto out;
985 }
986
987 out:
988 if (ret)
989 brcmf_sdiod_remove(sdiodev);
990
991 return ret;
992 }
993
994 /* devices we support, null terminated */
995 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
996 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)},
997 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)},
998 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
999 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
1000 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)},
1001 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM,
1002 SDIO_DEVICE_ID_BROADCOM_4335_4339)},
1003 { /* end: all zeroes */ },
1004 };
1005 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
1006
1007 static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
1008
1009
1010 static int brcmf_ops_sdio_probe(struct sdio_func *func,
1011 const struct sdio_device_id *id)
1012 {
1013 int err;
1014 struct brcmf_sdio_dev *sdiodev;
1015 struct brcmf_bus *bus_if;
1016
1017 brcmf_dbg(SDIO, "Enter\n");
1018 brcmf_dbg(SDIO, "Class=%x\n", func->class);
1019 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1020 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1021 brcmf_dbg(SDIO, "Function#: %d\n", func->num);
1022
1023 /* Consume func num 1 but dont do anything with it. */
1024 if (func->num == 1)
1025 return 0;
1026
1027 /* Ignore anything but func 2 */
1028 if (func->num != 2)
1029 return -ENODEV;
1030
1031 bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
1032 if (!bus_if)
1033 return -ENOMEM;
1034 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
1035 if (!sdiodev) {
1036 kfree(bus_if);
1037 return -ENOMEM;
1038 }
1039
1040 sdiodev->func[0] = func->card->sdio_func[0];
1041 sdiodev->func[1] = func->card->sdio_func[0];
1042 sdiodev->func[2] = func;
1043
1044 sdiodev->bus_if = bus_if;
1045 bus_if->bus_priv.sdio = sdiodev;
1046 dev_set_drvdata(&func->dev, bus_if);
1047 dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
1048 sdiodev->dev = &sdiodev->func[1]->dev;
1049 sdiodev->pdata = brcmfmac_sdio_pdata;
1050
1051 atomic_set(&sdiodev->suspend, false);
1052 init_waitqueue_head(&sdiodev->request_byte_wait);
1053 init_waitqueue_head(&sdiodev->request_word_wait);
1054 init_waitqueue_head(&sdiodev->request_buffer_wait);
1055
1056 brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n");
1057 err = brcmf_sdiod_probe(sdiodev);
1058 if (err) {
1059 brcmf_err("F2 error, probe failed %d...\n", err);
1060 goto fail;
1061 }
1062
1063 brcmf_dbg(SDIO, "F2 init completed...\n");
1064 return 0;
1065
1066 fail:
1067 dev_set_drvdata(&func->dev, NULL);
1068 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1069 kfree(sdiodev);
1070 kfree(bus_if);
1071 return err;
1072 }
1073
1074 static void brcmf_ops_sdio_remove(struct sdio_func *func)
1075 {
1076 struct brcmf_bus *bus_if;
1077 struct brcmf_sdio_dev *sdiodev;
1078
1079 brcmf_dbg(SDIO, "Enter\n");
1080 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1081 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1082 brcmf_dbg(SDIO, "Function: %d\n", func->num);
1083
1084 if (func->num != 1 && func->num != 2)
1085 return;
1086
1087 bus_if = dev_get_drvdata(&func->dev);
1088 if (bus_if) {
1089 sdiodev = bus_if->bus_priv.sdio;
1090 brcmf_sdiod_remove(sdiodev);
1091
1092 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1093 dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
1094
1095 kfree(bus_if);
1096 kfree(sdiodev);
1097 }
1098
1099 brcmf_dbg(SDIO, "Exit\n");
1100 }
1101
1102 #ifdef CONFIG_PM_SLEEP
1103 static int brcmf_ops_sdio_suspend(struct device *dev)
1104 {
1105 mmc_pm_flag_t sdio_flags;
1106 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1107 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1108 int ret = 0;
1109
1110 brcmf_dbg(SDIO, "\n");
1111
1112 atomic_set(&sdiodev->suspend, true);
1113
1114 sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
1115 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
1116 brcmf_err("Host can't keep power while suspended\n");
1117 return -EINVAL;
1118 }
1119
1120 ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
1121 if (ret) {
1122 brcmf_err("Failed to set pm_flags\n");
1123 return ret;
1124 }
1125
1126 brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
1127
1128 return ret;
1129 }
1130
1131 static int brcmf_ops_sdio_resume(struct device *dev)
1132 {
1133 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1134 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1135
1136 brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
1137 atomic_set(&sdiodev->suspend, false);
1138 return 0;
1139 }
1140
1141 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
1142 .suspend = brcmf_ops_sdio_suspend,
1143 .resume = brcmf_ops_sdio_resume,
1144 };
1145 #endif /* CONFIG_PM_SLEEP */
1146
1147 static struct sdio_driver brcmf_sdmmc_driver = {
1148 .probe = brcmf_ops_sdio_probe,
1149 .remove = brcmf_ops_sdio_remove,
1150 .name = BRCMFMAC_SDIO_PDATA_NAME,
1151 .id_table = brcmf_sdmmc_ids,
1152 #ifdef CONFIG_PM_SLEEP
1153 .drv = {
1154 .pm = &brcmf_sdio_pm_ops,
1155 },
1156 #endif /* CONFIG_PM_SLEEP */
1157 };
1158
1159 static int brcmf_sdio_pd_probe(struct platform_device *pdev)
1160 {
1161 brcmf_dbg(SDIO, "Enter\n");
1162
1163 brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);
1164
1165 if (brcmfmac_sdio_pdata->power_on)
1166 brcmfmac_sdio_pdata->power_on();
1167
1168 return 0;
1169 }
1170
1171 static int brcmf_sdio_pd_remove(struct platform_device *pdev)
1172 {
1173 brcmf_dbg(SDIO, "Enter\n");
1174
1175 if (brcmfmac_sdio_pdata->power_off)
1176 brcmfmac_sdio_pdata->power_off();
1177
1178 sdio_unregister_driver(&brcmf_sdmmc_driver);
1179
1180 return 0;
1181 }
1182
1183 static struct platform_driver brcmf_sdio_pd = {
1184 .remove = brcmf_sdio_pd_remove,
1185 .driver = {
1186 .name = BRCMFMAC_SDIO_PDATA_NAME,
1187 .owner = THIS_MODULE,
1188 }
1189 };
1190
1191 void brcmf_sdio_register(void)
1192 {
1193 int ret;
1194
1195 ret = sdio_register_driver(&brcmf_sdmmc_driver);
1196 if (ret)
1197 brcmf_err("sdio_register_driver failed: %d\n", ret);
1198 }
1199
1200 void brcmf_sdio_exit(void)
1201 {
1202 brcmf_dbg(SDIO, "Enter\n");
1203
1204 if (brcmfmac_sdio_pdata)
1205 platform_driver_unregister(&brcmf_sdio_pd);
1206 else
1207 sdio_unregister_driver(&brcmf_sdmmc_driver);
1208 }
1209
1210 void __init brcmf_sdio_init(void)
1211 {
1212 int ret;
1213
1214 brcmf_dbg(SDIO, "Enter\n");
1215
1216 ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
1217 if (ret == -ENODEV)
1218 brcmf_dbg(SDIO, "No platform data available.\n");
1219 }
Linux kernel - Deliverables
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