]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
brcmfmac: only show error message when brcmf_sdiod_regrw_helper() fails
[mirror_ubuntu-artful-kernel.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
47 #define SDIOH_API_ACCESS_RETRY_LIMIT 2
48
49 #define DMA_ALIGN_MASK 0x03
50
51 #define SDIO_FUNC1_BLOCKSIZE 64
52 #define SDIO_FUNC2_BLOCKSIZE 512
53 /* Maximum milliseconds to wait for F2 to come up */
54 #define SDIO_WAIT_F2RDY 3000
55
56 #define BRCMF_DEFAULT_TXGLOM_SIZE 32 /* max tx frames in glom chain */
57 #define BRCMF_DEFAULT_RXGLOM_SIZE 32 /* max rx frames in glom chain */
58
59 static int brcmf_sdiod_txglomsz = BRCMF_DEFAULT_TXGLOM_SIZE;
60 module_param_named(txglomsz, brcmf_sdiod_txglomsz, int, 0);
61 MODULE_PARM_DESC(txglomsz, "maximum tx packet chain size [SDIO]");
62
63 static irqreturn_t brcmf_sdiod_oob_irqhandler(int irq, void *dev_id)
64 {
65 struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
66 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
67
68 brcmf_dbg(INTR, "OOB intr triggered\n");
69
70 /* out-of-band interrupt is level-triggered which won't
71 * be cleared until dpc
72 */
73 if (sdiodev->irq_en) {
74 disable_irq_nosync(irq);
75 sdiodev->irq_en = false;
76 }
77
78 brcmf_sdio_isr(sdiodev->bus);
79
80 return IRQ_HANDLED;
81 }
82
83 static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func)
84 {
85 struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
86 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
87
88 brcmf_dbg(INTR, "IB intr triggered\n");
89
90 brcmf_sdio_isr(sdiodev->bus);
91 }
92
93 /* dummy handler for SDIO function 2 interrupt */
94 static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func)
95 {
96 }
97
98 static bool brcmf_sdiod_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
99 {
100 bool is_err = false;
101 #ifdef CONFIG_PM_SLEEP
102 is_err = atomic_read(&sdiodev->suspend);
103 #endif
104 return is_err;
105 }
106
107 static void brcmf_sdiod_pm_resume_wait(struct brcmf_sdio_dev *sdiodev,
108 wait_queue_head_t *wq)
109 {
110 #ifdef CONFIG_PM_SLEEP
111 int retry = 0;
112 while (atomic_read(&sdiodev->suspend) && retry++ != 30)
113 wait_event_timeout(*wq, false, HZ/100);
114 #endif
115 }
116
117 int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev)
118 {
119 int ret = 0;
120 u8 data;
121 unsigned long flags;
122
123 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
124 brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
125 sdiodev->pdata->oob_irq_nr);
126 ret = request_irq(sdiodev->pdata->oob_irq_nr,
127 brcmf_sdiod_oob_irqhandler,
128 sdiodev->pdata->oob_irq_flags,
129 "brcmf_oob_intr",
130 &sdiodev->func[1]->dev);
131 if (ret != 0) {
132 brcmf_err("request_irq failed %d\n", ret);
133 return ret;
134 }
135 sdiodev->oob_irq_requested = true;
136 spin_lock_init(&sdiodev->irq_en_lock);
137 spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
138 sdiodev->irq_en = true;
139 spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
140
141 ret = enable_irq_wake(sdiodev->pdata->oob_irq_nr);
142 if (ret != 0) {
143 brcmf_err("enable_irq_wake failed %d\n", ret);
144 return ret;
145 }
146 sdiodev->irq_wake = true;
147
148 sdio_claim_host(sdiodev->func[1]);
149
150 /* must configure SDIO_CCCR_IENx to enable irq */
151 data = brcmf_sdiod_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
152 data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
153 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
154
155 /* redirect, configure and enable io for interrupt signal */
156 data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
157 if (sdiodev->pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
158 data |= SDIO_SEPINT_ACT_HI;
159 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
160
161 sdio_release_host(sdiodev->func[1]);
162 } else {
163 brcmf_dbg(SDIO, "Entering\n");
164 sdio_claim_host(sdiodev->func[1]);
165 sdio_claim_irq(sdiodev->func[1], brcmf_sdiod_ib_irqhandler);
166 sdio_claim_irq(sdiodev->func[2], brcmf_sdiod_dummy_irqhandler);
167 sdio_release_host(sdiodev->func[1]);
168 }
169
170 return 0;
171 }
172
173 int brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)
174 {
175 brcmf_dbg(SDIO, "Entering\n");
176
177 if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
178 sdio_claim_host(sdiodev->func[1]);
179 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
180 brcmf_sdiod_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
181 sdio_release_host(sdiodev->func[1]);
182
183 if (sdiodev->oob_irq_requested) {
184 sdiodev->oob_irq_requested = false;
185 if (sdiodev->irq_wake) {
186 disable_irq_wake(sdiodev->pdata->oob_irq_nr);
187 sdiodev->irq_wake = false;
188 }
189 free_irq(sdiodev->pdata->oob_irq_nr,
190 &sdiodev->func[1]->dev);
191 sdiodev->irq_en = false;
192 }
193 } else {
194 sdio_claim_host(sdiodev->func[1]);
195 sdio_release_irq(sdiodev->func[2]);
196 sdio_release_irq(sdiodev->func[1]);
197 sdio_release_host(sdiodev->func[1]);
198 }
199
200 return 0;
201 }
202
203 static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func,
204 uint regaddr, u8 byte)
205 {
206 int err_ret;
207
208 /*
209 * Can only directly write to some F0 registers.
210 * Handle CCCR_IENx and CCCR_ABORT command
211 * as a special case.
212 */
213 if ((regaddr == SDIO_CCCR_ABORT) ||
214 (regaddr == SDIO_CCCR_IENx))
215 sdio_writeb(func, byte, regaddr, &err_ret);
216 else
217 sdio_f0_writeb(func, byte, regaddr, &err_ret);
218
219 return err_ret;
220 }
221
222 static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn,
223 u32 addr, u8 regsz, void *data, bool write)
224 {
225 struct sdio_func *func;
226 int ret;
227
228 brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
229 write, fn, addr, regsz);
230
231 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
232 if (brcmf_sdiod_pm_resume_error(sdiodev))
233 return -EIO;
234
235 /* only allow byte access on F0 */
236 if (WARN_ON(regsz > 1 && !fn))
237 return -EINVAL;
238 func = sdiodev->func[fn];
239
240 switch (regsz) {
241 case sizeof(u8):
242 if (write) {
243 if (fn)
244 sdio_writeb(func, *(u8 *)data, addr, &ret);
245 else
246 ret = brcmf_sdiod_f0_writeb(func, addr,
247 *(u8 *)data);
248 } else {
249 if (fn)
250 *(u8 *)data = sdio_readb(func, addr, &ret);
251 else
252 *(u8 *)data = sdio_f0_readb(func, addr, &ret);
253 }
254 break;
255 case sizeof(u16):
256 if (write)
257 sdio_writew(func, *(u16 *)data, addr, &ret);
258 else
259 *(u16 *)data = sdio_readw(func, addr, &ret);
260 break;
261 case sizeof(u32):
262 if (write)
263 sdio_writel(func, *(u32 *)data, addr, &ret);
264 else
265 *(u32 *)data = sdio_readl(func, addr, &ret);
266 break;
267 default:
268 brcmf_err("invalid size: %d\n", regsz);
269 break;
270 }
271
272 if (ret)
273 brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
274 write ? "write" : "read", fn, addr, ret);
275
276 return ret;
277 }
278
279 static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
280 u8 regsz, void *data, bool write)
281 {
282 u8 func;
283 s32 retry = 0;
284 int ret;
285
286 if (sdiodev->bus_if->state == BRCMF_BUS_NOMEDIUM)
287 return -ENOMEDIUM;
288
289 /*
290 * figure out how to read the register based on address range
291 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
292 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
293 * The rest: function 1 silicon backplane core registers
294 */
295 if ((addr & ~REG_F0_REG_MASK) == 0)
296 func = SDIO_FUNC_0;
297 else
298 func = SDIO_FUNC_1;
299
300 do {
301 if (!write)
302 memset(data, 0, regsz);
303 /* for retry wait for 1 ms till bus get settled down */
304 if (retry)
305 usleep_range(1000, 2000);
306 ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
307 data, write);
308 } while (ret != 0 && ret != -ENOMEDIUM &&
309 retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
310
311 if (ret == -ENOMEDIUM)
312 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_NOMEDIUM);
313 else if (ret != 0) {
314 /*
315 * SleepCSR register access can fail when
316 * waking up the device so reduce this noise
317 * in the logs.
318 */
319 if (addr != SBSDIO_FUNC1_SLEEPCSR)
320 brcmf_err("failed to %s data F%d@0x%05x, err: %d\n",
321 write ? "write" : "read", func, addr, ret);
322 else
323 brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
324 write ? "write" : "read", func, addr, ret);
325 }
326 return ret;
327 }
328
329 static int
330 brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
331 {
332 int err = 0, i;
333 u8 addr[3];
334
335 if (sdiodev->bus_if->state == BRCMF_BUS_NOMEDIUM)
336 return -ENOMEDIUM;
337
338 addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
339 addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
340 addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
341
342 for (i = 0; i < 3; i++) {
343 err = brcmf_sdiod_regrw_helper(sdiodev,
344 SBSDIO_FUNC1_SBADDRLOW + i,
345 sizeof(u8), &addr[i], true);
346 if (err) {
347 brcmf_err("failed at addr: 0x%0x\n",
348 SBSDIO_FUNC1_SBADDRLOW + i);
349 break;
350 }
351 }
352
353 return err;
354 }
355
356 static int
357 brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr)
358 {
359 uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
360 int err = 0;
361
362 if (bar0 != sdiodev->sbwad) {
363 err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
364 if (err)
365 return err;
366
367 sdiodev->sbwad = bar0;
368 }
369
370 *addr &= SBSDIO_SB_OFT_ADDR_MASK;
371
372 if (width == 4)
373 *addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
374
375 return 0;
376 }
377
378 u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
379 {
380 u8 data;
381 int retval;
382
383 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
384 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
385 false);
386 brcmf_dbg(SDIO, "data:0x%02x\n", data);
387
388 if (ret)
389 *ret = retval;
390
391 return data;
392 }
393
394 u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
395 {
396 u32 data;
397 int retval;
398
399 brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
400 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
401 if (retval)
402 goto done;
403 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
404 false);
405 brcmf_dbg(SDIO, "data:0x%08x\n", data);
406
407 done:
408 if (ret)
409 *ret = retval;
410
411 return data;
412 }
413
414 void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
415 u8 data, int *ret)
416 {
417 int retval;
418
419 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
420 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
421 true);
422 if (ret)
423 *ret = retval;
424 }
425
426 void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
427 u32 data, int *ret)
428 {
429 int retval;
430
431 brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
432 retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
433 if (retval)
434 goto done;
435 retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
436 true);
437
438 done:
439 if (ret)
440 *ret = retval;
441 }
442
443 static int brcmf_sdiod_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
444 bool write, u32 addr, struct sk_buff *pkt)
445 {
446 unsigned int req_sz;
447 int err;
448
449 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
450 if (brcmf_sdiod_pm_resume_error(sdiodev))
451 return -EIO;
452
453 /* Single skb use the standard mmc interface */
454 req_sz = pkt->len + 3;
455 req_sz &= (uint)~3;
456
457 if (write)
458 err = sdio_memcpy_toio(sdiodev->func[fn], addr,
459 ((u8 *)(pkt->data)), req_sz);
460 else if (fn == 1)
461 err = sdio_memcpy_fromio(sdiodev->func[fn], ((u8 *)(pkt->data)),
462 addr, req_sz);
463 else
464 /* function 2 read is FIFO operation */
465 err = sdio_readsb(sdiodev->func[fn], ((u8 *)(pkt->data)), addr,
466 req_sz);
467 if (err == -ENOMEDIUM)
468 brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_NOMEDIUM);
469 return err;
470 }
471
472 /**
473 * brcmf_sdiod_sglist_rw - SDIO interface function for block data access
474 * @sdiodev: brcmfmac sdio device
475 * @fn: SDIO function number
476 * @write: direction flag
477 * @addr: dongle memory address as source/destination
478 * @pkt: skb pointer
479 *
480 * This function takes the respbonsibility as the interface function to MMC
481 * stack for block data access. It assumes that the skb passed down by the
482 * caller has already been padded and aligned.
483 */
484 static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, uint fn,
485 bool write, u32 addr,
486 struct sk_buff_head *pktlist)
487 {
488 unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
489 unsigned int max_req_sz, orig_offset, dst_offset;
490 unsigned short max_seg_cnt, seg_sz;
491 unsigned char *pkt_data, *orig_data, *dst_data;
492 struct sk_buff *pkt_next = NULL, *local_pkt_next;
493 struct sk_buff_head local_list, *target_list;
494 struct mmc_request mmc_req;
495 struct mmc_command mmc_cmd;
496 struct mmc_data mmc_dat;
497 struct scatterlist *sgl;
498 int ret = 0;
499
500 if (!pktlist->qlen)
501 return -EINVAL;
502
503 brcmf_sdiod_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
504 if (brcmf_sdiod_pm_resume_error(sdiodev))
505 return -EIO;
506
507 target_list = pktlist;
508 /* for host with broken sg support, prepare a page aligned list */
509 __skb_queue_head_init(&local_list);
510 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
511 req_sz = 0;
512 skb_queue_walk(pktlist, pkt_next)
513 req_sz += pkt_next->len;
514 req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize);
515 while (req_sz > PAGE_SIZE) {
516 pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE);
517 if (pkt_next == NULL) {
518 ret = -ENOMEM;
519 goto exit;
520 }
521 __skb_queue_tail(&local_list, pkt_next);
522 req_sz -= PAGE_SIZE;
523 }
524 pkt_next = brcmu_pkt_buf_get_skb(req_sz);
525 if (pkt_next == NULL) {
526 ret = -ENOMEM;
527 goto exit;
528 }
529 __skb_queue_tail(&local_list, pkt_next);
530 target_list = &local_list;
531 }
532
533 func_blk_sz = sdiodev->func[fn]->cur_blksize;
534 max_req_sz = sdiodev->max_request_size;
535 max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count,
536 target_list->qlen);
537 seg_sz = target_list->qlen;
538 pkt_offset = 0;
539 pkt_next = target_list->next;
540
541 memset(&mmc_req, 0, sizeof(struct mmc_request));
542 memset(&mmc_cmd, 0, sizeof(struct mmc_command));
543 memset(&mmc_dat, 0, sizeof(struct mmc_data));
544
545 mmc_dat.sg = sdiodev->sgtable.sgl;
546 mmc_dat.blksz = func_blk_sz;
547 mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
548 mmc_cmd.opcode = SD_IO_RW_EXTENDED;
549 mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
550 mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
551 mmc_cmd.arg |= 1<<27; /* block mode */
552 /* for function 1 the addr will be incremented */
553 mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
554 mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
555 mmc_req.cmd = &mmc_cmd;
556 mmc_req.data = &mmc_dat;
557
558 while (seg_sz) {
559 req_sz = 0;
560 sg_cnt = 0;
561 sgl = sdiodev->sgtable.sgl;
562 /* prep sg table */
563 while (pkt_next != (struct sk_buff *)target_list) {
564 pkt_data = pkt_next->data + pkt_offset;
565 sg_data_sz = pkt_next->len - pkt_offset;
566 if (sg_data_sz > sdiodev->max_segment_size)
567 sg_data_sz = sdiodev->max_segment_size;
568 if (sg_data_sz > max_req_sz - req_sz)
569 sg_data_sz = max_req_sz - req_sz;
570
571 sg_set_buf(sgl, pkt_data, sg_data_sz);
572
573 sg_cnt++;
574 sgl = sg_next(sgl);
575 req_sz += sg_data_sz;
576 pkt_offset += sg_data_sz;
577 if (pkt_offset == pkt_next->len) {
578 pkt_offset = 0;
579 pkt_next = pkt_next->next;
580 }
581
582 if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt)
583 break;
584 }
585 seg_sz -= sg_cnt;
586
587 if (req_sz % func_blk_sz != 0) {
588 brcmf_err("sg request length %u is not %u aligned\n",
589 req_sz, func_blk_sz);
590 ret = -ENOTBLK;
591 goto exit;
592 }
593
594 mmc_dat.sg_len = sg_cnt;
595 mmc_dat.blocks = req_sz / func_blk_sz;
596 mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
597 mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
598 /* incrementing addr for function 1 */
599 if (fn == 1)
600 addr += req_sz;
601
602 mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
603 mmc_wait_for_req(sdiodev->func[fn]->card->host, &mmc_req);
604
605 ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
606 if (ret == -ENOMEDIUM) {
607 brcmf_bus_change_state(sdiodev->bus_if,
608 BRCMF_BUS_NOMEDIUM);
609 break;
610 } else if (ret != 0) {
611 brcmf_err("CMD53 sg block %s failed %d\n",
612 write ? "write" : "read", ret);
613 ret = -EIO;
614 break;
615 }
616 }
617
618 if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) {
619 local_pkt_next = local_list.next;
620 orig_offset = 0;
621 skb_queue_walk(pktlist, pkt_next) {
622 dst_offset = 0;
623 do {
624 req_sz = local_pkt_next->len - orig_offset;
625 req_sz = min_t(uint, pkt_next->len - dst_offset,
626 req_sz);
627 orig_data = local_pkt_next->data + orig_offset;
628 dst_data = pkt_next->data + dst_offset;
629 memcpy(dst_data, orig_data, req_sz);
630 orig_offset += req_sz;
631 dst_offset += req_sz;
632 if (orig_offset == local_pkt_next->len) {
633 orig_offset = 0;
634 local_pkt_next = local_pkt_next->next;
635 }
636 if (dst_offset == pkt_next->len)
637 break;
638 } while (!skb_queue_empty(&local_list));
639 }
640 }
641
642 exit:
643 sg_init_table(sdiodev->sgtable.sgl, sdiodev->sgtable.orig_nents);
644 while ((pkt_next = __skb_dequeue(&local_list)) != NULL)
645 brcmu_pkt_buf_free_skb(pkt_next);
646
647 return ret;
648 }
649
650 int brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
651 {
652 struct sk_buff *mypkt;
653 int err;
654
655 mypkt = brcmu_pkt_buf_get_skb(nbytes);
656 if (!mypkt) {
657 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
658 nbytes);
659 return -EIO;
660 }
661
662 err = brcmf_sdiod_recv_pkt(sdiodev, mypkt);
663 if (!err)
664 memcpy(buf, mypkt->data, nbytes);
665
666 brcmu_pkt_buf_free_skb(mypkt);
667 return err;
668 }
669
670 int brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, struct sk_buff *pkt)
671 {
672 u32 addr = sdiodev->sbwad;
673 int err = 0;
674
675 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pkt->len);
676
677 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
678 if (err)
679 goto done;
680
681 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr, pkt);
682
683 done:
684 return err;
685 }
686
687 int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
688 struct sk_buff_head *pktq, uint totlen)
689 {
690 struct sk_buff *glom_skb;
691 struct sk_buff *skb;
692 u32 addr = sdiodev->sbwad;
693 int err = 0;
694
695 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n",
696 addr, pktq->qlen);
697
698 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
699 if (err)
700 goto done;
701
702 if (pktq->qlen == 1)
703 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
704 pktq->next);
705 else if (!sdiodev->sg_support) {
706 glom_skb = brcmu_pkt_buf_get_skb(totlen);
707 if (!glom_skb)
708 return -ENOMEM;
709 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
710 glom_skb);
711 if (err)
712 goto done;
713
714 skb_queue_walk(pktq, skb) {
715 memcpy(skb->data, glom_skb->data, skb->len);
716 skb_pull(glom_skb, skb->len);
717 }
718 } else
719 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, false, addr,
720 pktq);
721
722 done:
723 return err;
724 }
725
726 int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
727 {
728 struct sk_buff *mypkt;
729 u32 addr = sdiodev->sbwad;
730 int err;
731
732 mypkt = brcmu_pkt_buf_get_skb(nbytes);
733 if (!mypkt) {
734 brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
735 nbytes);
736 return -EIO;
737 }
738
739 memcpy(mypkt->data, buf, nbytes);
740
741 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
742
743 if (!err)
744 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true, addr,
745 mypkt);
746
747 brcmu_pkt_buf_free_skb(mypkt);
748 return err;
749
750 }
751
752 int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev,
753 struct sk_buff_head *pktq)
754 {
755 struct sk_buff *skb;
756 u32 addr = sdiodev->sbwad;
757 int err;
758
759 brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pktq->qlen);
760
761 err = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
762 if (err)
763 return err;
764
765 if (pktq->qlen == 1 || !sdiodev->sg_support)
766 skb_queue_walk(pktq, skb) {
767 err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, true,
768 addr, skb);
769 if (err)
770 break;
771 }
772 else
773 err = brcmf_sdiod_sglist_rw(sdiodev, SDIO_FUNC_2, true, addr,
774 pktq);
775
776 return err;
777 }
778
779 int
780 brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
781 u8 *data, uint size)
782 {
783 int bcmerror = 0;
784 struct sk_buff *pkt;
785 u32 sdaddr;
786 uint dsize;
787
788 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
789 pkt = dev_alloc_skb(dsize);
790 if (!pkt) {
791 brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
792 return -EIO;
793 }
794 pkt->priority = 0;
795
796 /* Determine initial transfer parameters */
797 sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
798 if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
799 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
800 else
801 dsize = size;
802
803 sdio_claim_host(sdiodev->func[1]);
804
805 /* Do the transfer(s) */
806 while (size) {
807 /* Set the backplane window to include the start address */
808 bcmerror = brcmf_sdiod_set_sbaddr_window(sdiodev, address);
809 if (bcmerror)
810 break;
811
812 brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
813 write ? "write" : "read", dsize,
814 sdaddr, address & SBSDIO_SBWINDOW_MASK);
815
816 sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
817 sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
818
819 skb_put(pkt, dsize);
820 if (write)
821 memcpy(pkt->data, data, dsize);
822 bcmerror = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_1, write,
823 sdaddr, pkt);
824 if (bcmerror) {
825 brcmf_err("membytes transfer failed\n");
826 break;
827 }
828 if (!write)
829 memcpy(data, pkt->data, dsize);
830 skb_trim(pkt, 0);
831
832 /* Adjust for next transfer (if any) */
833 size -= dsize;
834 if (size) {
835 data += dsize;
836 address += dsize;
837 sdaddr = 0;
838 dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
839 }
840 }
841
842 dev_kfree_skb(pkt);
843
844 /* Return the window to backplane enumeration space for core access */
845 if (brcmf_sdiod_set_sbaddr_window(sdiodev, sdiodev->sbwad))
846 brcmf_err("FAILED to set window back to 0x%x\n",
847 sdiodev->sbwad);
848
849 sdio_release_host(sdiodev->func[1]);
850
851 return bcmerror;
852 }
853
854 int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
855 {
856 char t_func = (char)fn;
857 brcmf_dbg(SDIO, "Enter\n");
858
859 /* issue abort cmd52 command through F0 */
860 brcmf_sdiod_request_data(sdiodev, SDIO_FUNC_0, SDIO_CCCR_ABORT,
861 sizeof(t_func), &t_func, true);
862
863 brcmf_dbg(SDIO, "Exit\n");
864 return 0;
865 }
866
867 static void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev)
868 {
869 uint nents;
870 int err;
871
872 if (!sdiodev->sg_support)
873 return;
874
875 nents = max_t(uint, BRCMF_DEFAULT_RXGLOM_SIZE, brcmf_sdiod_txglomsz);
876 nents += (nents >> 4) + 1;
877
878 WARN_ON(nents > sdiodev->max_segment_count);
879
880 brcmf_dbg(TRACE, "nents=%d\n", nents);
881 err = sg_alloc_table(&sdiodev->sgtable, nents, GFP_KERNEL);
882 if (err < 0) {
883 brcmf_err("allocation failed: disable scatter-gather");
884 sdiodev->sg_support = false;
885 }
886
887 sdiodev->txglomsz = brcmf_sdiod_txglomsz;
888 }
889
890 static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev)
891 {
892 if (sdiodev->bus) {
893 brcmf_sdio_remove(sdiodev->bus);
894 sdiodev->bus = NULL;
895 }
896
897 /* Disable Function 2 */
898 sdio_claim_host(sdiodev->func[2]);
899 sdio_disable_func(sdiodev->func[2]);
900 sdio_release_host(sdiodev->func[2]);
901
902 /* Disable Function 1 */
903 sdio_claim_host(sdiodev->func[1]);
904 sdio_disable_func(sdiodev->func[1]);
905 sdio_release_host(sdiodev->func[1]);
906
907 sg_free_table(&sdiodev->sgtable);
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 /* allocate scatter-gather table. sg support
964 * will be disabled upon allocation failure.
965 */
966 brcmf_sdiod_sgtable_alloc(sdiodev);
967
968 /* try to attach to the target device */
969 sdiodev->bus = brcmf_sdio_probe(sdiodev);
970 if (!sdiodev->bus) {
971 ret = -ENODEV;
972 goto out;
973 }
974
975 out:
976 if (ret)
977 brcmf_sdiod_remove(sdiodev);
978
979 return ret;
980 }
981
982 /* devices we support, null terminated */
983 static const struct sdio_device_id brcmf_sdmmc_ids[] = {
984 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)},
985 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)},
986 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
987 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
988 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)},
989 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43362)},
990 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM,
991 SDIO_DEVICE_ID_BROADCOM_4335_4339)},
992 {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4354)},
993 { /* end: all zeroes */ },
994 };
995 MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
996
997 static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
998
999
1000 static int brcmf_ops_sdio_probe(struct sdio_func *func,
1001 const struct sdio_device_id *id)
1002 {
1003 int err;
1004 struct brcmf_sdio_dev *sdiodev;
1005 struct brcmf_bus *bus_if;
1006
1007 brcmf_dbg(SDIO, "Enter\n");
1008 brcmf_dbg(SDIO, "Class=%x\n", func->class);
1009 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1010 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1011 brcmf_dbg(SDIO, "Function#: %d\n", func->num);
1012
1013 /* Consume func num 1 but dont do anything with it. */
1014 if (func->num == 1)
1015 return 0;
1016
1017 /* Ignore anything but func 2 */
1018 if (func->num != 2)
1019 return -ENODEV;
1020
1021 bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
1022 if (!bus_if)
1023 return -ENOMEM;
1024 sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
1025 if (!sdiodev) {
1026 kfree(bus_if);
1027 return -ENOMEM;
1028 }
1029
1030 /* store refs to functions used. mmc_card does
1031 * not hold the F0 function pointer.
1032 */
1033 sdiodev->func[0] = kmemdup(func, sizeof(*func), GFP_KERNEL);
1034 sdiodev->func[0]->num = 0;
1035 sdiodev->func[1] = func->card->sdio_func[0];
1036 sdiodev->func[2] = func;
1037
1038 sdiodev->bus_if = bus_if;
1039 bus_if->bus_priv.sdio = sdiodev;
1040 bus_if->proto_type = BRCMF_PROTO_BCDC;
1041 dev_set_drvdata(&func->dev, bus_if);
1042 dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
1043 sdiodev->dev = &sdiodev->func[1]->dev;
1044 sdiodev->pdata = brcmfmac_sdio_pdata;
1045
1046 atomic_set(&sdiodev->suspend, false);
1047 init_waitqueue_head(&sdiodev->request_word_wait);
1048 init_waitqueue_head(&sdiodev->request_buffer_wait);
1049
1050 brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n");
1051 err = brcmf_sdiod_probe(sdiodev);
1052 if (err) {
1053 brcmf_err("F2 error, probe failed %d...\n", err);
1054 goto fail;
1055 }
1056
1057 brcmf_dbg(SDIO, "F2 init completed...\n");
1058 return 0;
1059
1060 fail:
1061 dev_set_drvdata(&func->dev, NULL);
1062 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1063 kfree(sdiodev->func[0]);
1064 kfree(sdiodev);
1065 kfree(bus_if);
1066 return err;
1067 }
1068
1069 static void brcmf_ops_sdio_remove(struct sdio_func *func)
1070 {
1071 struct brcmf_bus *bus_if;
1072 struct brcmf_sdio_dev *sdiodev;
1073
1074 brcmf_dbg(SDIO, "Enter\n");
1075 brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
1076 brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
1077 brcmf_dbg(SDIO, "Function: %d\n", func->num);
1078
1079 if (func->num != 1 && func->num != 2)
1080 return;
1081
1082 bus_if = dev_get_drvdata(&func->dev);
1083 if (bus_if) {
1084 sdiodev = bus_if->bus_priv.sdio;
1085 brcmf_sdiod_remove(sdiodev);
1086
1087 dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
1088 dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
1089
1090 kfree(bus_if);
1091 kfree(sdiodev->func[0]);
1092 kfree(sdiodev);
1093 }
1094
1095 brcmf_dbg(SDIO, "Exit\n");
1096 }
1097
1098 #ifdef CONFIG_PM_SLEEP
1099 static int brcmf_ops_sdio_suspend(struct device *dev)
1100 {
1101 mmc_pm_flag_t sdio_flags;
1102 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1103 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1104 int ret = 0;
1105
1106 brcmf_dbg(SDIO, "Enter\n");
1107
1108 sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
1109 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
1110 brcmf_err("Host can't keep power while suspended\n");
1111 return -EINVAL;
1112 }
1113
1114 atomic_set(&sdiodev->suspend, true);
1115
1116 ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
1117 if (ret) {
1118 brcmf_err("Failed to set pm_flags\n");
1119 atomic_set(&sdiodev->suspend, false);
1120 return ret;
1121 }
1122
1123 brcmf_sdio_wd_timer(sdiodev->bus, 0);
1124
1125 return ret;
1126 }
1127
1128 static int brcmf_ops_sdio_resume(struct device *dev)
1129 {
1130 struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1131 struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1132
1133 brcmf_dbg(SDIO, "Enter\n");
1134 brcmf_sdio_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
1135 atomic_set(&sdiodev->suspend, false);
1136 return 0;
1137 }
1138
1139 static const struct dev_pm_ops brcmf_sdio_pm_ops = {
1140 .suspend = brcmf_ops_sdio_suspend,
1141 .resume = brcmf_ops_sdio_resume,
1142 };
1143 #endif /* CONFIG_PM_SLEEP */
1144
1145 static struct sdio_driver brcmf_sdmmc_driver = {
1146 .probe = brcmf_ops_sdio_probe,
1147 .remove = brcmf_ops_sdio_remove,
1148 .name = BRCMFMAC_SDIO_PDATA_NAME,
1149 .id_table = brcmf_sdmmc_ids,
1150 .drv = {
1151 .owner = THIS_MODULE,
1152 #ifdef CONFIG_PM_SLEEP
1153 .pm = &brcmf_sdio_pm_ops,
1154 #endif /* CONFIG_PM_SLEEP */
1155 },
1156 };
1157
1158 static int __init brcmf_sdio_pd_probe(struct platform_device *pdev)
1159 {
1160 brcmf_dbg(SDIO, "Enter\n");
1161
1162 brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);
1163
1164 if (brcmfmac_sdio_pdata->power_on)
1165 brcmfmac_sdio_pdata->power_on();
1166
1167 return 0;
1168 }
1169
1170 static int brcmf_sdio_pd_remove(struct platform_device *pdev)
1171 {
1172 brcmf_dbg(SDIO, "Enter\n");
1173
1174 if (brcmfmac_sdio_pdata->power_off)
1175 brcmfmac_sdio_pdata->power_off();
1176
1177 sdio_unregister_driver(&brcmf_sdmmc_driver);
1178
1179 return 0;
1180 }
1181
1182 static struct platform_driver brcmf_sdio_pd = {
1183 .remove = brcmf_sdio_pd_remove,
1184 .driver = {
1185 .name = BRCMFMAC_SDIO_PDATA_NAME,
1186 .owner = THIS_MODULE,
1187 }
1188 };
1189
1190 void brcmf_sdio_register(void)
1191 {
1192 int ret;
1193
1194 ret = sdio_register_driver(&brcmf_sdmmc_driver);
1195 if (ret)
1196 brcmf_err("sdio_register_driver failed: %d\n", ret);
1197 }
1198
1199 void brcmf_sdio_exit(void)
1200 {
1201 brcmf_dbg(SDIO, "Enter\n");
1202
1203 if (brcmfmac_sdio_pdata)
1204 platform_driver_unregister(&brcmf_sdio_pd);
1205 else
1206 sdio_unregister_driver(&brcmf_sdmmc_driver);
1207 }
1208
1209 void __init brcmf_sdio_init(void)
1210 {
1211 int ret;
1212
1213 brcmf_dbg(SDIO, "Enter\n");
1214
1215 ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
1216 if (ret == -ENODEV)
1217 brcmf_dbg(SDIO, "No platform data available.\n");
1218 }
Ubuntu Artful kernel mirror