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cfg80211: set the rates mask in connection probes over specified freq
[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/card.h>
29 #include <linux/mmc/host.h>
30 #include <linux/platform_device.h>
31 #include <linux/platform_data/brcmfmac-sdio.h>
32 #include <linux/suspend.h>
33 #include <linux/errno.h>
34 #include <linux/module.h>
35 #include <net/cfg80211.h>
36
37 #include <defs.h>
38 #include <brcm_hw_ids.h>
39 #include <brcmu_utils.h>
40 #include <brcmu_wifi.h>
41 #include <chipcommon.h>
42 #include <soc.h>
43 #include "chip.h"
44 #include "dhd_bus.h"
45 #include "dhd_dbg.h"
46 #include "sdio_host.h"
47 #include "of.h"
48
49 #define SDIOH_API_ACCESS_RETRY_LIMIT 2
50
51 #define DMA_ALIGN_MASK 0x03
52
53 #define SDIO_FUNC1_BLOCKSIZE 64
54 #define SDIO_FUNC2_BLOCKSIZE 512
55 /* Maximum milliseconds to wait for F2 to come up */
56 #define SDIO_WAIT_F2RDY 3000
57
58 #define BRCMF_DEFAULT_TXGLOM_SIZE 32 /* max tx frames in glom chain */
59 #define BRCMF_DEFAULT_RXGLOM_SIZE 32 /* max rx frames in glom chain */
60
61 static int brcmf_sdiod_txglomsz = BRCMF_DEFAULT_TXGLOM_SIZE;
62 module_param_named(txglomsz, brcmf_sdiod_txglomsz, int, 0);
63 MODULE_PARM_DESC(txglomsz, "maximum tx packet chain size [SDIO]");
64
65 static irqreturn_t brcmf_sdiod_oob_irqhandler(int irq, void *dev_id)
66 {
67 struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
68 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
69
70 brcmf_dbg(INTR, "OOB intr triggered\n");
71
72 /* out-of-band interrupt is level-triggered which won't
73 * be cleared until dpc
74 */
75 if (sdiodev->irq_en) {
76 disable_irq_nosync(irq);
77 sdiodev->irq_en = false;
78 }
79
80 brcmf_sdio_isr(sdiodev->bus);
81
82 return IRQ_HANDLED;
83 }
84
85 static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func)
86 {
87 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
88 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
89
90 brcmf_dbg(INTR, "IB intr triggered\n");
91
92 brcmf_sdio_isr(sdiodev->bus);
93 }
94
95 /* dummy handler for SDIO function 2 interrupt */
96 static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func)
97 {
98 }
99
100 static bool brcmf_sdiod_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
101 {
102 bool is_err = false;
103 #ifdef CONFIG_PM_SLEEP
104 is_err = atomic_read(&sdiodev->suspend);
105 #endif
106 return is_err;
107 }
108
109 static void brcmf_sdiod_pm_resume_wait(struct brcmf_sdio_dev *sdiodev,
110 wait_queue_head_t *wq)
111 {
112 #ifdef CONFIG_PM_SLEEP
113 int retry = 0;
114 while (atomic_read(&sdiodev->suspend) && retry++ != 30)
115 wait_event_timeout(*wq, false, HZ/100);
116 #endif
117 }
118
119 int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev)
120 {
121 int ret = 0;
122 u8 data;
123 u32 addr, gpiocontrol;
124 unsigned long flags;
125
126 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
127 brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
128 sdiodev->pdata->oob_irq_nr);
129 ret = request_irq(sdiodev->pdata->oob_irq_nr,
130 brcmf_sdiod_oob_irqhandler,
131 sdiodev->pdata->oob_irq_flags,
132 "brcmf_oob_intr",
133 &sdiodev->func[1]->dev);
134 if (ret != 0) {
135 brcmf_err("request_irq failed %d\n", ret);
136 return ret;
137 }
138 sdiodev->oob_irq_requested = true;
139 spin_lock_init(&sdiodev->irq_en_lock);
140 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
141 sdiodev->irq_en = true;
142 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
143
144 ret = enable_irq_wake(sdiodev->pdata->oob_irq_nr);
145 if (ret != 0) {
146 brcmf_err("enable_irq_wake failed %d\n", ret);
147 return ret;
148 }
149 sdiodev->irq_wake = true;
150
151 sdio_claim_host(sdiodev->func[1]);
152
153 if (sdiodev->bus_if->chip == BRCM_CC_43362_CHIP_ID) {
154 /* assign GPIO to SDIO core */
155 addr = CORE_CC_REG(SI_ENUM_BASE, gpiocontrol);
156 gpiocontrol = brcmf_sdiod_regrl(sdiodev, addr, &ret);
157 gpiocontrol |= 0x2;
158 brcmf_sdiod_regwl(sdiodev, addr, gpiocontrol, &ret);
159
160 brcmf_sdiod_regwb(sdiodev, SBSDIO_GPIO_SELECT, 0xf,
161 &ret);
162 brcmf_sdiod_regwb(sdiodev, SBSDIO_GPIO_OUT, 0, &ret);
163 brcmf_sdiod_regwb(sdiodev, SBSDIO_GPIO_EN, 0x2, &ret);
164 }
165
166 /* must configure SDIO_CCCR_IENx to enable irq */
167 data = brcmf_sdiod_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
168 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
169 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
170
171 /* redirect, configure and enable io for interrupt signal */
172 data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
173 if (sdiodev->pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
174 data |= SDIO_SEPINT_ACT_HI;
175 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
176
177 sdio_release_host(sdiodev->func[1]);
178 } else {
179 brcmf_dbg(SDIO, "Entering\n");
180 sdio_claim_host(sdiodev->func[1]);
181 sdio_claim_irq(sdiodev->func[1], brcmf_sdiod_ib_irqhandler);
182 sdio_claim_irq(sdiodev->func[2], brcmf_sdiod_dummy_irqhandler);
183 sdio_release_host(sdiodev->func[1]);
184 }
185
186 return 0;
187 }
188
189 int brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)
190 {
191 brcmf_dbg(SDIO, "Entering\n");
192
193 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
194 sdio_claim_host(sdiodev->func[1]);
195 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
196 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
197 sdio_release_host(sdiodev->func[1]);
198
199 if (sdiodev->oob_irq_requested) {
200 sdiodev->oob_irq_requested = false;
201 if (sdiodev->irq_wake) {
202 disable_irq_wake(sdiodev->pdata->oob_irq_nr);
203 sdiodev->irq_wake = false;
204 }
205 free_irq(sdiodev->pdata->oob_irq_nr,
206 &sdiodev->func[1]->dev);
207 sdiodev->irq_en = false;
208 }
209 } else {
210 sdio_claim_host(sdiodev->func[1]);
211 sdio_release_irq(sdiodev->func[2]);
212 sdio_release_irq(sdiodev->func[1]);
213 sdio_release_host(sdiodev->func[1]);
214 }
215
216 return 0;
217 }
218
219 static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func,
220 uint regaddr, u8 byte)
221 {
222 int err_ret;
223
224 /*
225 * Can only directly write to some F0 registers.
226 * Handle CCCR_IENx and CCCR_ABORT command
227 * as a special case.
228 */
229 if ((regaddr == SDIO_CCCR_ABORT) ||
230 (regaddr == SDIO_CCCR_IENx))
231 sdio_writeb(func, byte, regaddr, &err_ret);
232 else
233 sdio_f0_writeb(func, byte, regaddr, &err_ret);
234
235 return err_ret;
236 }
237
238 static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn,
239 u32 addr, u8 regsz, void *data, bool write)
240 {
241 struct sdio_func *func;
242 int ret;
243
244 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
245 write, fn, addr, regsz);
246
247 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
248 if (brcmf_sdiod_pm_resume_error(sdiodev))
249 return -EIO;
250
251 /* only allow byte access on F0 */
252 if (WARN_ON(regsz > 1 && !fn))
253 return -EINVAL;
254 func = sdiodev->func[fn];
255
256 switch (regsz) {
257 case sizeof(u8):
258 if (write) {
259 if (fn)
260 sdio_writeb(func, *(u8 *)data, addr, &ret);
261 else
262 ret = brcmf_sdiod_f0_writeb(func, addr,
263 *(u8 *)data);
264 } else {
265 if (fn)
266 *(u8 *)data = sdio_readb(func, addr, &ret);
267 else
268 *(u8 *)data = sdio_f0_readb(func, addr, &ret);
269 }
270 break;
271 case sizeof(u16):
272 if (write)
273 sdio_writew(func, *(u16 *)data, addr, &ret);
274 else
275 *(u16 *)data = sdio_readw(func, addr, &ret);
276 break;
277 case sizeof(u32):
278 if (write)
279 sdio_writel(func, *(u32 *)data, addr, &ret);
280 else
281 *(u32 *)data = sdio_readl(func, addr, &ret);
282 break;
283 default:
284 brcmf_err("invalid size: %d\n", regsz);
285 break;
286 }
287
288 if (ret)
289 brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
290 write ? "write" : "read", fn, addr, ret);
291
292 return ret;
293 }
294
295 static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
296 u8 regsz, void *data, bool write)
297 {
298 u8 func;
299 s32 retry = 0;
300 int ret;
301
302 if (sdiodev->bus_if->state == BRCMF_BUS_NOMEDIUM)
303 return -ENOMEDIUM;
304
305 /*
306 * figure out how to read the register based on address range
307 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
308 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
309 * The rest: function 1 silicon backplane core registers
310 */
311 if ((addr & ~REG_F0_REG_MASK) == 0)
312 func = SDIO_FUNC_0;
313 else
314 func = SDIO_FUNC_1;
315
316 do {
317 if (!write)
318 memset(data, 0, regsz);
319 /* for retry wait for 1 ms till bus get settled down */
320 if (retry)
321 usleep_range(1000, 2000);
322 ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
323 data, write);
324 } while (ret != 0 && ret != -ENOMEDIUM &&
325 retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
326
327 if (ret == -ENOMEDIUM)
328 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_NOMEDIUM);
329 else if (ret != 0) {
330 /*
331 * SleepCSR register access can fail when
332 * waking up the device so reduce this noise
333 * in the logs.
334 */
335 if (addr != SBSDIO_FUNC1_SLEEPCSR)
336 brcmf_err("failed to %s data F%d@0x%05x, err: %d\n",
337 write ? "write" : "read", func, addr, ret);
338 else
339 brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
340 write ? "write" : "read", func, addr, ret);
341 }
342 return ret;
343 }
344
345 static int
346 brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
347 {
348 int err = 0, i;
349 u8 addr[3];
350
351 if (sdiodev->bus_if->state == BRCMF_BUS_NOMEDIUM)
352 return -ENOMEDIUM;
353
354 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
355 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
356 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
357
358 for (i = 0; i < 3; i++) {
359 err = brcmf_sdiod_regrw_helper(sdiodev,
360 SBSDIO_FUNC1_SBADDRLOW + i,
361 sizeof(u8), &addr[i], true);
362 if (err) {
363 brcmf_err("failed at addr: 0x%0x\n",
364 SBSDIO_FUNC1_SBADDRLOW + i);
365 break;
366 }
367 }
368
369 return err;
370 }
371
372 static int
373 brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr)
374 {
375 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
376 int err = 0;
377
378 if (bar0 != sdiodev->sbwad) {
379 err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
380 if (err)
381 return err;
382
383 sdiodev->sbwad = bar0;
384 }
385
386 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
387
388 if (width == 4)
389 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
390
391 return 0;
392 }
393
394 u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
395 {
396 u8 data;
397 int retval;
398
399 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
400 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
401 false);
402 brcmf_dbg(SDIO, "data:0x%02x\n", data);
403
404 if (ret)
405 *ret = retval;
406
407 return data;
408 }
409
410 u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
411 {
412 u32 data;
413 int retval;
414
415 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
416 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
417 if (retval)
418 goto done;
419 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
420 false);
421 brcmf_dbg(SDIO, "data:0x%08x\n", data);
422
423 done:
424 if (ret)
425 *ret = retval;
426
427 return data;
428 }
429
430 void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
431 u8 data, int *ret)
432 {
433 int retval;
434
435 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
436 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
437 true);
438 if (ret)
439 *ret = retval;
440 }
441
442 void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
443 u32 data, int *ret)
444 {
445 int retval;
446
447 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
448 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
449 if (retval)
450 goto done;
451 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
452 true);
453
454 done:
455 if (ret)
456 *ret = retval;
457 }
458
459 static int brcmf_sdiod_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
460 bool write, u32 addr, struct sk_buff *pkt)
461 {
462 unsigned int req_sz;
463 int err;
464
465 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
466 if (brcmf_sdiod_pm_resume_error(sdiodev))
467 return -EIO;
468
469 /* Single skb use the standard mmc interface */
470 req_sz = pkt->len + 3;
471 req_sz &= (uint)~3;
472
473 if (write)
474 err = sdio_memcpy_toio(sdiodev->func[fn], addr,
475 ((u8 *)(pkt->data)), req_sz);
476 else if (fn == 1)
477 err = sdio_memcpy_fromio(sdiodev->func[fn], ((u8 *)(pkt->data)),
478 addr, req_sz);
479 else
480 /* function 2 read is FIFO operation */
481 err = sdio_readsb(sdiodev->func[fn], ((u8 *)(pkt->data)), addr,
482 req_sz);
483 if (err == -ENOMEDIUM)
484 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_NOMEDIUM);
485 return err;
486 }
487
488 /**
489 * brcmf_sdiod_sglist_rw - SDIO interface function for block data access
490 * @sdiodev: brcmfmac sdio device
491 * @fn: SDIO function number
492 * @write: direction flag
493 * @addr: dongle memory address as source/destination
494 * @pkt: skb pointer
495 *
496 * This function takes the respbonsibility as the interface function to MMC
497 * stack for block data access. It assumes that the skb passed down by the
498 * caller has already been padded and aligned.
499 */
500 static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn,
501 bool write, u32 addr,
502 struct sk_buff_head *pktlist)
503 {
504 unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
505 unsigned int max_req_sz, orig_offset, dst_offset;
506 unsigned short max_seg_cnt, seg_sz;
507 unsigned char *pkt_data, *orig_data, *dst_data;
508 struct sk_buff *pkt_next = NULL, *local_pkt_next;
509 struct sk_buff_head local_list, *target_list;
510 struct mmc_request mmc_req;
511 struct mmc_command mmc_cmd;
512 struct mmc_data mmc_dat;
513 struct scatterlist *sgl;
514 int ret = 0;
515
516 if (!pktlist->qlen)
517 return -EINVAL;
518
519 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
520 if (brcmf_sdiod_pm_resume_error(sdiodev))
521 return -EIO;
522
523 target_list = pktlist;
524 /* for host with broken sg support, prepare a page aligned list */
525 __skb_queue_head_init(&local_list);
526 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
527 req_sz = 0;
528 skb_queue_walk(pktlist, pkt_next)
529 req_sz += pkt_next->len;
530 req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize);
531 while (req_sz > PAGE_SIZE) {
532 pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE);
533 if (pkt_next == NULL) {
534 ret = -ENOMEM;
535 goto exit;
536 }
537 __skb_queue_tail(&local_list, pkt_next);
538 req_sz -= PAGE_SIZE;
539 }
540 pkt_next = brcmu_pkt_buf_get_skb(req_sz);
541 if (pkt_next == NULL) {
542 ret = -ENOMEM;
543 goto exit;
544 }
545 __skb_queue_tail(&local_list, pkt_next);
546 target_list = &local_list;
547 }
548
549 func_blk_sz = sdiodev->func[fn]->cur_blksize;
550 max_req_sz = sdiodev->max_request_size;
551 max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count,
552 target_list->qlen);
553 seg_sz = target_list->qlen;
554 pkt_offset = 0;
555 pkt_next = target_list->next;
556
557 memset(&mmc_req, 0, sizeof(struct mmc_request));
558 memset(&mmc_cmd, 0, sizeof(struct mmc_command));
559 memset(&mmc_dat, 0, sizeof(struct mmc_data));
560
561 mmc_dat.sg = sdiodev->sgtable.sgl;
562 mmc_dat.blksz = func_blk_sz;
563 mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
564 mmc_cmd.opcode = SD_IO_RW_EXTENDED;
565 mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
566 mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
567 mmc_cmd.arg |= 1<<27; /* block mode */
568 /* for function 1 the addr will be incremented */
569 mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
570 mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
571 mmc_req.cmd = &mmc_cmd;
572 mmc_req.data = &mmc_dat;
573
574 while (seg_sz) {
575 req_sz = 0;
576 sg_cnt = 0;
577 sgl = sdiodev->sgtable.sgl;
578 /* prep sg table */
579 while (pkt_next != (struct sk_buff *)target_list) {
580 pkt_data = pkt_next->data + pkt_offset;
581 sg_data_sz = pkt_next->len - pkt_offset;
582 if (sg_data_sz > sdiodev->max_segment_size)
583 sg_data_sz = sdiodev->max_segment_size;
584 if (sg_data_sz > max_req_sz - req_sz)
585 sg_data_sz = max_req_sz - req_sz;
586
587 sg_set_buf(sgl, pkt_data, sg_data_sz);
588
589 sg_cnt++;
590 sgl = sg_next(sgl);
591 req_sz += sg_data_sz;
592 pkt_offset += sg_data_sz;
593 if (pkt_offset == pkt_next->len) {
594 pkt_offset = 0;
595 pkt_next = pkt_next->next;
596 }
597
598 if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt)
599 break;
600 }
601 seg_sz -= sg_cnt;
602
603 if (req_sz % func_blk_sz != 0) {
604 brcmf_err("sg request length %u is not %u aligned\n",
605 req_sz, func_blk_sz);
606 ret = -ENOTBLK;
607 goto exit;
608 }
609
610 mmc_dat.sg_len = sg_cnt;
611 mmc_dat.blocks = req_sz / func_blk_sz;
612 mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
613 mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
614 /* incrementing addr for function 1 */
615 if (fn == 1)
616 addr += req_sz;
617
618 mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
619 mmc_wait_for_req(sdiodev->func[fn]->card->host, &mmc_req);
620
621 ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
622 if (ret == -ENOMEDIUM) {
623 brcmf_bus_change_state(sdiodev->bus_if,
624 BRCMF_BUS_NOMEDIUM);
625 break;
626 } else if (ret != 0) {
627 brcmf_err("CMD53 sg block %s failed %d\n",
628 write ? "write" : "read", ret);
629 ret = -EIO;
630 break;
631 }
632 }
633
634 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
635 local_pkt_next = local_list.next;
636 orig_offset = 0;
637 skb_queue_walk(pktlist, pkt_next) {
638 dst_offset = 0;
639 do {
640 req_sz = local_pkt_next->len - orig_offset;
641 req_sz = min_t(uint, pkt_next->len - dst_offset,
642 req_sz);
643 orig_data = local_pkt_next->data + orig_offset;
644 dst_data = pkt_next->data + dst_offset;
645 memcpy(dst_data, orig_data, req_sz);
646 orig_offset += req_sz;
647 dst_offset += req_sz;
648 if (orig_offset == local_pkt_next->len) {
649 orig_offset = 0;
650 local_pkt_next = local_pkt_next->next;
651 }
652 if (dst_offset == pkt_next->len)
653 break;
654 } while (!skb_queue_empty(&local_list));
655 }
656 }
657
658 exit:
659 sg_init_table(sdiodev->sgtable.sgl, sdiodev->sgtable.orig_nents);
660 while ((pkt_next = __skb_dequeue(&local_list)) != NULL)
661 brcmu_pkt_buf_free_skb(pkt_next);
662
663 return ret;
664 }
665
666 int brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
667 {
668 struct sk_buff *mypkt;
669 int err;
670
671 mypkt = brcmu_pkt_buf_get_skb(nbytes);
672 if (!mypkt) {
673 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
674 nbytes);
675 return -EIO;
676 }
677
678 err = brcmf_sdiod_recv_pkt(sdiodev, mypkt);
679 if (!err)
680 memcpy(buf, mypkt->data, nbytes);
681
682 brcmu_pkt_buf_free_skb(mypkt);
683 return err;
684 }
685
686 int brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, struct sk_buff *pkt)
687 {
688 u32 addr = sdiodev->sbwad;
689 int err = 0;
690
691 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pkt->len);
692
693 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
694 if (err)
695 goto done;
696
697 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr, pkt);
698
699 done:
700 return err;
701 }
702
703 int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
704 struct sk_buff_head *pktq, uint totlen)
705 {
706 struct sk_buff *glom_skb;
707 struct sk_buff *skb;
708 u32 addr = sdiodev->sbwad;
709 int err = 0;
710
711 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n",
712 addr, pktq->qlen);
713
714 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
715 if (err)
716 goto done;
717
718 if (pktq->qlen == 1)
719 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
720 pktq->next);
721 else if (!sdiodev->sg_support) {
722 glom_skb = brcmu_pkt_buf_get_skb(totlen);
723 if (!glom_skb)
724 return -ENOMEM;
725 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
726 glom_skb);
727 if (err)
728 goto done;
729
730 skb_queue_walk(pktq, skb) {
731 memcpy(skb->data, glom_skb->data, skb->len);
732 skb_pull(glom_skb, skb->len);
733 }
734 } else
735 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, false, addr,
736 pktq);
737
738 done:
739 return err;
740 }
741
742 int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
743 {
744 struct sk_buff *mypkt;
745 u32 addr = sdiodev->sbwad;
746 int err;
747
748 mypkt = brcmu_pkt_buf_get_skb(nbytes);
749 if (!mypkt) {
750 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
751 nbytes);
752 return -EIO;
753 }
754
755 memcpy(mypkt->data, buf, nbytes);
756
757 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
758
759 if (!err)
760 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true, addr,
761 mypkt);
762
763 brcmu_pkt_buf_free_skb(mypkt);
764 return err;
765
766 }
767
768 int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,
769 struct sk_buff_head *pktq)
770 {
771 struct sk_buff *skb;
772 u32 addr = sdiodev->sbwad;
773 int err;
774
775 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pktq->qlen);
776
777 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
778 if (err)
779 return err;
780
781 if (pktq->qlen == 1 || !sdiodev->sg_support)
782 skb_queue_walk(pktq, skb) {
783 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true,
784 addr, skb);
785 if (err)
786 break;
787 }
788 else
789 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, true, addr,
790 pktq);
791
792 return err;
793 }
794
795 int
796 brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
797 u8 *data, uint size)
798 {
799 int bcmerror = 0;
800 struct sk_buff *pkt;
801 u32 sdaddr;
802 uint dsize;
803
804 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
805 pkt = dev_alloc_skb(dsize);
806 if (!pkt) {
807 brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
808 return -EIO;
809 }
810 pkt->priority = 0;
811
812 /* Determine initial transfer parameters */
813 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
814 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
815 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
816 else
817 dsize = size;
818
819 sdio_claim_host(sdiodev->func[1]);
820
821 /* Do the transfer(s) */
822 while (size) {
823 /* Set the backplane window to include the start address */
824 bcmerror = brcmf_sdiod_set_sbaddr_window(sdiodev, address);
825 if (bcmerror)
826 break;
827
828 brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
829 write ? "write" : "read", dsize,
830 sdaddr, address & SBSDIO_SBWINDOW_MASK);
831
832 sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
833 sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
834
835 skb_put(pkt, dsize);
836 if (write)
837 memcpy(pkt->data, data, dsize);
838 bcmerror = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_1, write,
839 sdaddr, pkt);
840 if (bcmerror) {
841 brcmf_err("membytes transfer failed\n");
842 break;
843 }
844 if (!write)
845 memcpy(data, pkt->data, dsize);
846 skb_trim(pkt, 0);
847
848 /* Adjust for next transfer (if any) */
849 size -= dsize;
850 if (size) {
851 data += dsize;
852 address += dsize;
853 sdaddr = 0;
854 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
855 }
856 }
857
858 dev_kfree_skb(pkt);
859
860 /* Return the window to backplane enumeration space for core access */
861 if (brcmf_sdiod_set_sbaddr_window(sdiodev, sdiodev->sbwad))
862 brcmf_err("FAILED to set window back to 0x%x\n",
863 sdiodev->sbwad);
864
865 sdio_release_host(sdiodev->func[1]);
866
867 return bcmerror;
868 }
869
870 int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
871 {
872 char t_func = (char)fn;
873 brcmf_dbg(SDIO, "Enter\n");
874
875 /* issue abort cmd52 command through F0 */
876 brcmf_sdiod_request_data(sdiodev, SDIO_FUNC_0, SDIO_CCCR_ABORT,
877 sizeof(t_func), &t_func, true);
878
879 brcmf_dbg(SDIO, "Exit\n");
880 return 0;
881 }
882
883 static void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev)
884 {
885 uint nents;
886 int err;
887
888 if (!sdiodev->sg_support)
889 return;
890
891 nents = max_t(uint, BRCMF_DEFAULT_RXGLOM_SIZE, brcmf_sdiod_txglomsz);
892 nents += (nents >> 4) + 1;
893
894 WARN_ON(nents > sdiodev->max_segment_count);
895
896 brcmf_dbg(TRACE, "nents=%d\n", nents);
897 err = sg_alloc_table(&sdiodev->sgtable, nents, GFP_KERNEL);
898 if (err < 0) {
899 brcmf_err("allocation failed: disable scatter-gather");
900 sdiodev->sg_support = false;
901 }
902
903 sdiodev->txglomsz = brcmf_sdiod_txglomsz;
904 }
905
906 static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev)
907 {
908 if (sdiodev->bus) {
909 brcmf_sdio_remove(sdiodev->bus);
910 sdiodev->bus = NULL;
911 }
912
913 /* Disable Function 2 */
914 sdio_claim_host(sdiodev->func[2]);
915 sdio_disable_func(sdiodev->func[2]);
916 sdio_release_host(sdiodev->func[2]);
917
918 /* Disable Function 1 */
919 sdio_claim_host(sdiodev->func[1]);
920 sdio_disable_func(sdiodev->func[1]);
921 sdio_release_host(sdiodev->func[1]);
922
923 sg_free_table(&sdiodev->sgtable);
924 sdiodev->sbwad = 0;
925
926 return 0;
927 }
928
929 static int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
930 {
931 struct sdio_func *func;
932 struct mmc_host *host;
933 uint max_blocks;
934 int ret = 0;
935
936 sdiodev->num_funcs = 2;
937
938 sdio_claim_host(sdiodev->func[1]);
939
940 ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
941 if (ret) {
942 brcmf_err("Failed to set F1 blocksize\n");
943 sdio_release_host(sdiodev->func[1]);
944 goto out;
945 }
946 ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
947 if (ret) {
948 brcmf_err("Failed to set F2 blocksize\n");
949 sdio_release_host(sdiodev->func[1]);
950 goto out;
951 }
952
953 /* increase F2 timeout */
954 sdiodev->func[2]->enable_timeout = SDIO_WAIT_F2RDY;
955
956 /* Enable Function 1 */
957 ret = sdio_enable_func(sdiodev->func[1]);
958 sdio_release_host(sdiodev->func[1]);
959 if (ret) {
960 brcmf_err("Failed to enable F1: err=%d\n", ret);
961 goto out;
962 }
963
964 /*
965 * determine host related variables after brcmf_sdiod_probe()
966 * as func->cur_blksize is properly set and F2 init has been
967 * completed successfully.
968 */
969 func = sdiodev->func[2];
970 host = func->card->host;
971 sdiodev->sg_support = host->max_segs > 1;
972 max_blocks = min_t(uint, host->max_blk_count, 511u);
973 sdiodev->max_request_size = min_t(uint, host->max_req_size,
974 max_blocks * func->cur_blksize);
975 sdiodev->max_segment_count = min_t(uint, host->max_segs,
976 SG_MAX_SINGLE_ALLOC);
977 sdiodev->max_segment_size = host->max_seg_size;
978
979 /* allocate scatter-gather table. sg support
980 * will be disabled upon allocation failure.
981 */
982 brcmf_sdiod_sgtable_alloc(sdiodev);
983
984 /* try to attach to the target device */
985 sdiodev->bus = brcmf_sdio_probe(sdiodev);
986 if (!sdiodev->bus) {
987 ret = -ENODEV;
988 goto out;
989 }
990
991 out:
992 if (ret)
993 brcmf_sdiod_remove(sdiodev);
994
995 return ret;
996 }
997
998 #define BRCMF_SDIO_DEVICE(dev_id) \
999 {SDIO_DEVICE(BRCM_SDIO_VENDOR_ID_BROADCOM, dev_id)}
1000
1001 /* devices we support, null terminated */
1002 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
1003 BRCMF_SDIO_DEVICE(BRCM_SDIO_43143_DEVICE_ID),
1004 BRCMF_SDIO_DEVICE(BRCM_SDIO_43241_DEVICE_ID),
1005 BRCMF_SDIO_DEVICE(BRCM_SDIO_4329_DEVICE_ID),
1006 BRCMF_SDIO_DEVICE(BRCM_SDIO_4330_DEVICE_ID),
1007 BRCMF_SDIO_DEVICE(BRCM_SDIO_4334_DEVICE_ID),
1008 BRCMF_SDIO_DEVICE(BRCM_SDIO_43362_DEVICE_ID),
1009 BRCMF_SDIO_DEVICE(BRCM_SDIO_4335_4339_DEVICE_ID),
1010 BRCMF_SDIO_DEVICE(BRCM_SDIO_4354_DEVICE_ID),
1011 { /* end: all zeroes */ }
1012 };
1013 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
1014
1015 static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
1016
1017
1018 static int brcmf_ops_sdio_probe(struct sdio_func *func,
1019 const struct sdio_device_id *id)
1020 {
1021 int err;
1022 struct brcmf_sdio_dev *sdiodev;
1023 struct brcmf_bus *bus_if;
1024
1025 brcmf_dbg(SDIO, "Enter\n");
1026 brcmf_dbg(SDIO, "Class=%x\n", func->class);
1027 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1028 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1029 brcmf_dbg(SDIO, "Function#: %d\n", func->num);
1030
1031 /* Consume func num 1 but dont do anything with it. */
1032 if (func->num == 1)
1033 return 0;
1034
1035 /* Ignore anything but func 2 */
1036 if (func->num != 2)
1037 return -ENODEV;
1038
1039 bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
1040 if (!bus_if)
1041 return -ENOMEM;
1042 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
1043 if (!sdiodev) {
1044 kfree(bus_if);
1045 return -ENOMEM;
1046 }
1047
1048 /* store refs to functions used. mmc_card does
1049 * not hold the F0 function pointer.
1050 */
1051 sdiodev->func[0] = kmemdup(func, sizeof(*func), GFP_KERNEL);
1052 sdiodev->func[0]->num = 0;
1053 sdiodev->func[1] = func->card->sdio_func[0];
1054 sdiodev->func[2] = func;
1055
1056 sdiodev->bus_if = bus_if;
1057 bus_if->bus_priv.sdio = sdiodev;
1058 bus_if->proto_type = BRCMF_PROTO_BCDC;
1059 dev_set_drvdata(&func->dev, bus_if);
1060 dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
1061 sdiodev->dev = &sdiodev->func[1]->dev;
1062 sdiodev->pdata = brcmfmac_sdio_pdata;
1063
1064 if (!sdiodev->pdata)
1065 brcmf_of_probe(sdiodev);
1066
1067 atomic_set(&sdiodev->suspend, false);
1068 init_waitqueue_head(&sdiodev->request_word_wait);
1069 init_waitqueue_head(&sdiodev->request_buffer_wait);
1070
1071 brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n");
1072 err = brcmf_sdiod_probe(sdiodev);
1073 if (err) {
1074 brcmf_err("F2 error, probe failed %d...\n", err);
1075 goto fail;
1076 }
1077
1078 brcmf_dbg(SDIO, "F2 init completed...\n");
1079 return 0;
1080
1081 fail:
1082 dev_set_drvdata(&func->dev, NULL);
1083 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1084 kfree(sdiodev->func[0]);
1085 kfree(sdiodev);
1086 kfree(bus_if);
1087 return err;
1088 }
1089
1090 static void brcmf_ops_sdio_remove(struct sdio_func *func)
1091 {
1092 struct brcmf_bus *bus_if;
1093 struct brcmf_sdio_dev *sdiodev;
1094
1095 brcmf_dbg(SDIO, "Enter\n");
1096 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1097 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1098 brcmf_dbg(SDIO, "Function: %d\n", func->num);
1099
1100 if (func->num != 1 && func->num != 2)
1101 return;
1102
1103 bus_if = dev_get_drvdata(&func->dev);
1104 if (bus_if) {
1105 sdiodev = bus_if->bus_priv.sdio;
1106 brcmf_sdiod_remove(sdiodev);
1107
1108 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1109 dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
1110
1111 kfree(bus_if);
1112 kfree(sdiodev->func[0]);
1113 kfree(sdiodev);
1114 }
1115
1116 brcmf_dbg(SDIO, "Exit\n");
1117 }
1118
1119 #ifdef CONFIG_PM_SLEEP
1120 static int brcmf_ops_sdio_suspend(struct device *dev)
1121 {
1122 mmc_pm_flag_t sdio_flags;
1123 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1124 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1125 int ret = 0;
1126
1127 brcmf_dbg(SDIO, "Enter\n");
1128
1129 sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
1130 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
1131 brcmf_err("Host can't keep power while suspended\n");
1132 return -EINVAL;
1133 }
1134
1135 atomic_set(&sdiodev->suspend, true);
1136
1137 ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
1138 if (ret) {
1139 brcmf_err("Failed to set pm_flags\n");
1140 atomic_set(&sdiodev->suspend, false);
1141 return ret;
1142 }
1143
1144 brcmf_sdio_wd_timer(sdiodev->bus, 0);
1145
1146 return ret;
1147 }
1148
1149 static int brcmf_ops_sdio_resume(struct device *dev)
1150 {
1151 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1152 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1153
1154 brcmf_dbg(SDIO, "Enter\n");
1155 brcmf_sdio_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
1156 atomic_set(&sdiodev->suspend, false);
1157 return 0;
1158 }
1159
1160 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
1161 .suspend = brcmf_ops_sdio_suspend,
1162 .resume = brcmf_ops_sdio_resume,
1163 };
1164 #endif /* CONFIG_PM_SLEEP */
1165
1166 static struct sdio_driver brcmf_sdmmc_driver = {
1167 .probe = brcmf_ops_sdio_probe,
1168 .remove = brcmf_ops_sdio_remove,
1169 .name = BRCMFMAC_SDIO_PDATA_NAME,
1170 .id_table = brcmf_sdmmc_ids,
1171 .drv = {
1172 .owner = THIS_MODULE,
1173 #ifdef CONFIG_PM_SLEEP
1174 .pm = &brcmf_sdio_pm_ops,
1175 #endif /* CONFIG_PM_SLEEP */
1176 },
1177 };
1178
1179 static int __init brcmf_sdio_pd_probe(struct platform_device *pdev)
1180 {
1181 brcmf_dbg(SDIO, "Enter\n");
1182
1183 brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);
1184
1185 if (brcmfmac_sdio_pdata->power_on)
1186 brcmfmac_sdio_pdata->power_on();
1187
1188 return 0;
1189 }
1190
1191 static int brcmf_sdio_pd_remove(struct platform_device *pdev)
1192 {
1193 brcmf_dbg(SDIO, "Enter\n");
1194
1195 if (brcmfmac_sdio_pdata->power_off)
1196 brcmfmac_sdio_pdata->power_off();
1197
1198 sdio_unregister_driver(&brcmf_sdmmc_driver);
1199
1200 return 0;
1201 }
1202
1203 static struct platform_driver brcmf_sdio_pd = {
1204 .remove = brcmf_sdio_pd_remove,
1205 .driver = {
1206 .name = BRCMFMAC_SDIO_PDATA_NAME,
1207 .owner = THIS_MODULE,
1208 }
1209 };
1210
1211 void brcmf_sdio_register(void)
1212 {
1213 int ret;
1214
1215 ret = sdio_register_driver(&brcmf_sdmmc_driver);
1216 if (ret)
1217 brcmf_err("sdio_register_driver failed: %d\n", ret);
1218 }
1219
1220 void brcmf_sdio_exit(void)
1221 {
1222 brcmf_dbg(SDIO, "Enter\n");
1223
1224 if (brcmfmac_sdio_pdata)
1225 platform_driver_unregister(&brcmf_sdio_pd);
1226 else
1227 sdio_unregister_driver(&brcmf_sdmmc_driver);
1228 }
1229
1230 void __init brcmf_sdio_init(void)
1231 {
1232 int ret;
1233
1234 brcmf_dbg(SDIO, "Enter\n");
1235
1236 ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
1237 if (ret == -ENODEV)
1238 brcmf_dbg(SDIO, "No platform data available.\n");
1239 }
Linux kernel - Deliverables
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