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10#include <linux/kernel.h>
11#include <linux/mmc/core.h>
12#include <linux/mmc/host.h>
13#include <linux/mmc/mmc.h>
14#include <linux/scatterlist.h>
15#include <linux/workqueue.h>
16
17#include "greybus.h"
18#include "gbphy.h"
19
20struct gb_sdio_host {
21 struct gb_connection *connection;
22 struct gbphy_device *gbphy_dev;
23 struct mmc_host *mmc;
24 struct mmc_request *mrq;
25 struct mutex lock;
26 size_t data_max;
27 spinlock_t xfer;
28 bool xfer_stop;
29 struct workqueue_struct *mrq_workqueue;
30 struct work_struct mrqwork;
31 u8 queued_events;
32 bool removed;
33 bool card_present;
34 bool read_only;
35};
36
37
38#define GB_SDIO_RSP_R1_R5_R6_R7 (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
39 GB_SDIO_RSP_OPCODE)
40#define GB_SDIO_RSP_R3_R4 (GB_SDIO_RSP_PRESENT)
41#define GB_SDIO_RSP_R2 (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
42 GB_SDIO_RSP_136)
43#define GB_SDIO_RSP_R1B (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
44 GB_SDIO_RSP_OPCODE | GB_SDIO_RSP_BUSY)
45
46
47#define GB_SDIO_VDD_SHIFT 8
48
49#ifndef MMC_CAP2_CORE_RUNTIME_PM
50#define MMC_CAP2_CORE_RUNTIME_PM 0
51#endif
52
53static inline bool single_op(struct mmc_command *cmd)
54{
55 uint32_t opcode = cmd->opcode;
56
57 return opcode == MMC_WRITE_BLOCK ||
58 opcode == MMC_READ_SINGLE_BLOCK;
59}
60
61static void _gb_sdio_set_host_caps(struct gb_sdio_host *host, u32 r)
62{
63 u32 caps = 0;
64 u32 caps2 = 0;
65
66 caps = ((r & GB_SDIO_CAP_NONREMOVABLE) ? MMC_CAP_NONREMOVABLE : 0) |
67 ((r & GB_SDIO_CAP_4_BIT_DATA) ? MMC_CAP_4_BIT_DATA : 0) |
68 ((r & GB_SDIO_CAP_8_BIT_DATA) ? MMC_CAP_8_BIT_DATA : 0) |
69 ((r & GB_SDIO_CAP_MMC_HS) ? MMC_CAP_MMC_HIGHSPEED : 0) |
70 ((r & GB_SDIO_CAP_SD_HS) ? MMC_CAP_SD_HIGHSPEED : 0) |
71 ((r & GB_SDIO_CAP_ERASE) ? MMC_CAP_ERASE : 0) |
72 ((r & GB_SDIO_CAP_1_2V_DDR) ? MMC_CAP_1_2V_DDR : 0) |
73 ((r & GB_SDIO_CAP_1_8V_DDR) ? MMC_CAP_1_8V_DDR : 0) |
74 ((r & GB_SDIO_CAP_POWER_OFF_CARD) ? MMC_CAP_POWER_OFF_CARD : 0) |
75 ((r & GB_SDIO_CAP_UHS_SDR12) ? MMC_CAP_UHS_SDR12 : 0) |
76 ((r & GB_SDIO_CAP_UHS_SDR25) ? MMC_CAP_UHS_SDR25 : 0) |
77 ((r & GB_SDIO_CAP_UHS_SDR50) ? MMC_CAP_UHS_SDR50 : 0) |
78 ((r & GB_SDIO_CAP_UHS_SDR104) ? MMC_CAP_UHS_SDR104 : 0) |
79 ((r & GB_SDIO_CAP_UHS_DDR50) ? MMC_CAP_UHS_DDR50 : 0) |
80 ((r & GB_SDIO_CAP_DRIVER_TYPE_A) ? MMC_CAP_DRIVER_TYPE_A : 0) |
81 ((r & GB_SDIO_CAP_DRIVER_TYPE_C) ? MMC_CAP_DRIVER_TYPE_C : 0) |
82 ((r & GB_SDIO_CAP_DRIVER_TYPE_D) ? MMC_CAP_DRIVER_TYPE_D : 0);
83
84 caps2 = ((r & GB_SDIO_CAP_HS200_1_2V) ? MMC_CAP2_HS200_1_2V_SDR : 0) |
85 ((r & GB_SDIO_CAP_HS400_1_2V) ? MMC_CAP2_HS400_1_2V : 0) |
86 ((r & GB_SDIO_CAP_HS400_1_8V) ? MMC_CAP2_HS400_1_8V : 0) |
87 ((r & GB_SDIO_CAP_HS200_1_8V) ? MMC_CAP2_HS200_1_8V_SDR : 0);
88
89 host->mmc->caps = caps;
90 host->mmc->caps2 = caps2 | MMC_CAP2_CORE_RUNTIME_PM;
91
92 if (caps & MMC_CAP_NONREMOVABLE)
93 host->card_present = true;
94}
95
96static u32 _gb_sdio_get_host_ocr(u32 ocr)
97{
98 return (((ocr & GB_SDIO_VDD_165_195) ? MMC_VDD_165_195 : 0) |
99 ((ocr & GB_SDIO_VDD_20_21) ? MMC_VDD_20_21 : 0) |
100 ((ocr & GB_SDIO_VDD_21_22) ? MMC_VDD_21_22 : 0) |
101 ((ocr & GB_SDIO_VDD_22_23) ? MMC_VDD_22_23 : 0) |
102 ((ocr & GB_SDIO_VDD_23_24) ? MMC_VDD_23_24 : 0) |
103 ((ocr & GB_SDIO_VDD_24_25) ? MMC_VDD_24_25 : 0) |
104 ((ocr & GB_SDIO_VDD_25_26) ? MMC_VDD_25_26 : 0) |
105 ((ocr & GB_SDIO_VDD_26_27) ? MMC_VDD_26_27 : 0) |
106 ((ocr & GB_SDIO_VDD_27_28) ? MMC_VDD_27_28 : 0) |
107 ((ocr & GB_SDIO_VDD_28_29) ? MMC_VDD_28_29 : 0) |
108 ((ocr & GB_SDIO_VDD_29_30) ? MMC_VDD_29_30 : 0) |
109 ((ocr & GB_SDIO_VDD_30_31) ? MMC_VDD_30_31 : 0) |
110 ((ocr & GB_SDIO_VDD_31_32) ? MMC_VDD_31_32 : 0) |
111 ((ocr & GB_SDIO_VDD_32_33) ? MMC_VDD_32_33 : 0) |
112 ((ocr & GB_SDIO_VDD_33_34) ? MMC_VDD_33_34 : 0) |
113 ((ocr & GB_SDIO_VDD_34_35) ? MMC_VDD_34_35 : 0) |
114 ((ocr & GB_SDIO_VDD_35_36) ? MMC_VDD_35_36 : 0)
115 );
116}
117
118static int gb_sdio_get_caps(struct gb_sdio_host *host)
119{
120 struct gb_sdio_get_caps_response response;
121 struct mmc_host *mmc = host->mmc;
122 u16 data_max;
123 u32 blksz;
124 u32 ocr;
125 u32 r;
126 int ret;
127
128 ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_GET_CAPABILITIES,
129 NULL, 0, &response, sizeof(response));
130 if (ret < 0)
131 return ret;
132 r = le32_to_cpu(response.caps);
133
134 _gb_sdio_set_host_caps(host, r);
135
136
137 data_max = gb_operation_get_payload_size_max(host->connection);
138 data_max = min(data_max - sizeof(struct gb_sdio_transfer_request),
139 data_max - sizeof(struct gb_sdio_transfer_response));
140
141 blksz = min_t(u16, le16_to_cpu(response.max_blk_size), data_max);
142 blksz = max_t(u32, 512, blksz);
143
144 mmc->max_blk_size = rounddown_pow_of_two(blksz);
145 mmc->max_blk_count = le16_to_cpu(response.max_blk_count);
146 host->data_max = data_max;
147
148
149 ocr = _gb_sdio_get_host_ocr(le32_to_cpu(response.ocr));
150 mmc->ocr_avail = ocr;
151 mmc->ocr_avail_sdio = mmc->ocr_avail;
152 mmc->ocr_avail_sd = mmc->ocr_avail;
153 mmc->ocr_avail_mmc = mmc->ocr_avail;
154
155
156 mmc->f_min = le32_to_cpu(response.f_min);
157 mmc->f_max = le32_to_cpu(response.f_max);
158
159 return 0;
160}
161
162static void _gb_queue_event(struct gb_sdio_host *host, u8 event)
163{
164 if (event & GB_SDIO_CARD_INSERTED)
165 host->queued_events &= ~GB_SDIO_CARD_REMOVED;
166 else if (event & GB_SDIO_CARD_REMOVED)
167 host->queued_events &= ~GB_SDIO_CARD_INSERTED;
168
169 host->queued_events |= event;
170}
171
172static int _gb_sdio_process_events(struct gb_sdio_host *host, u8 event)
173{
174 u8 state_changed = 0;
175
176 if (event & GB_SDIO_CARD_INSERTED) {
177 if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
178 return 0;
179 if (host->card_present)
180 return 0;
181 host->card_present = true;
182 state_changed = 1;
183 }
184
185 if (event & GB_SDIO_CARD_REMOVED) {
186 if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
187 return 0;
188 if (!(host->card_present))
189 return 0;
190 host->card_present = false;
191 state_changed = 1;
192 }
193
194 if (event & GB_SDIO_WP) {
195 host->read_only = true;
196 }
197
198 if (state_changed) {
199 dev_info(mmc_dev(host->mmc), "card %s now event\n",
200 (host->card_present ? "inserted" : "removed"));
201 mmc_detect_change(host->mmc, 0);
202 }
203
204 return 0;
205}
206
207static int gb_sdio_request_handler(struct gb_operation *op)
208{
209 struct gb_sdio_host *host = gb_connection_get_data(op->connection);
210 struct gb_message *request;
211 struct gb_sdio_event_request *payload;
212 u8 type = op->type;
213 int ret = 0;
214 u8 event;
215
216 if (type != GB_SDIO_TYPE_EVENT) {
217 dev_err(mmc_dev(host->mmc),
218 "unsupported unsolicited event: %u\n", type);
219 return -EINVAL;
220 }
221
222 request = op->request;
223
224 if (request->payload_size < sizeof(*payload)) {
225 dev_err(mmc_dev(host->mmc), "wrong event size received (%zu < %zu)\n",
226 request->payload_size, sizeof(*payload));
227 return -EINVAL;
228 }
229
230 payload = request->payload;
231 event = payload->event;
232
233 if (host->removed)
234 _gb_queue_event(host, event);
235 else
236 ret = _gb_sdio_process_events(host, event);
237
238 return ret;
239}
240
241static int gb_sdio_set_ios(struct gb_sdio_host *host,
242 struct gb_sdio_set_ios_request *request)
243{
244 int ret;
245
246 ret = gbphy_runtime_get_sync(host->gbphy_dev);
247 if (ret)
248 return ret;
249
250 ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_SET_IOS, request,
251 sizeof(*request), NULL, 0);
252
253 gbphy_runtime_put_autosuspend(host->gbphy_dev);
254
255 return ret;
256}
257
258static int _gb_sdio_send(struct gb_sdio_host *host, struct mmc_data *data,
259 size_t len, u16 nblocks, off_t skip)
260{
261 struct gb_sdio_transfer_request *request;
262 struct gb_sdio_transfer_response *response;
263 struct gb_operation *operation;
264 struct scatterlist *sg = data->sg;
265 unsigned int sg_len = data->sg_len;
266 size_t copied;
267 u16 send_blksz;
268 u16 send_blocks;
269 int ret;
270
271 WARN_ON(len > host->data_max);
272
273 operation = gb_operation_create(host->connection, GB_SDIO_TYPE_TRANSFER,
274 len + sizeof(*request),
275 sizeof(*response), GFP_KERNEL);
276 if (!operation)
277 return -ENOMEM;
278
279 request = operation->request->payload;
280 request->data_flags = (data->flags >> 8);
281 request->data_blocks = cpu_to_le16(nblocks);
282 request->data_blksz = cpu_to_le16(data->blksz);
283
284 copied = sg_pcopy_to_buffer(sg, sg_len, &request->data[0], len, skip);
285
286 if (copied != len) {
287 ret = -EINVAL;
288 goto err_put_operation;
289 }
290
291 ret = gb_operation_request_send_sync(operation);
292 if (ret < 0)
293 goto err_put_operation;
294
295 response = operation->response->payload;
296
297 send_blocks = le16_to_cpu(response->data_blocks);
298 send_blksz = le16_to_cpu(response->data_blksz);
299
300 if (len != send_blksz * send_blocks) {
301 dev_err(mmc_dev(host->mmc), "send: size received: %zu != %d\n",
302 len, send_blksz * send_blocks);
303 ret = -EINVAL;
304 }
305
306err_put_operation:
307 gb_operation_put(operation);
308
309 return ret;
310}
311
312static int _gb_sdio_recv(struct gb_sdio_host *host, struct mmc_data *data,
313 size_t len, u16 nblocks, off_t skip)
314{
315 struct gb_sdio_transfer_request *request;
316 struct gb_sdio_transfer_response *response;
317 struct gb_operation *operation;
318 struct scatterlist *sg = data->sg;
319 unsigned int sg_len = data->sg_len;
320 size_t copied;
321 u16 recv_blksz;
322 u16 recv_blocks;
323 int ret;
324
325 WARN_ON(len > host->data_max);
326
327 operation = gb_operation_create(host->connection, GB_SDIO_TYPE_TRANSFER,
328 sizeof(*request),
329 len + sizeof(*response), GFP_KERNEL);
330 if (!operation)
331 return -ENOMEM;
332
333 request = operation->request->payload;
334 request->data_flags = (data->flags >> 8);
335 request->data_blocks = cpu_to_le16(nblocks);
336 request->data_blksz = cpu_to_le16(data->blksz);
337
338 ret = gb_operation_request_send_sync(operation);
339 if (ret < 0)
340 goto err_put_operation;
341
342 response = operation->response->payload;
343 recv_blocks = le16_to_cpu(response->data_blocks);
344 recv_blksz = le16_to_cpu(response->data_blksz);
345
346 if (len != recv_blksz * recv_blocks) {
347 dev_err(mmc_dev(host->mmc), "recv: size received: %d != %zu\n",
348 recv_blksz * recv_blocks, len);
349 ret = -EINVAL;
350 goto err_put_operation;
351 }
352
353 copied = sg_pcopy_from_buffer(sg, sg_len, &response->data[0], len,
354 skip);
355 if (copied != len)
356 ret = -EINVAL;
357
358err_put_operation:
359 gb_operation_put(operation);
360
361 return ret;
362}
363
364static int gb_sdio_transfer(struct gb_sdio_host *host, struct mmc_data *data)
365{
366 size_t left, len;
367 off_t skip = 0;
368 int ret = 0;
369 u16 nblocks;
370
371 if (single_op(data->mrq->cmd) && data->blocks > 1) {
372 ret = -ETIMEDOUT;
373 goto out;
374 }
375
376 left = data->blksz * data->blocks;
377
378 while (left) {
379
380 spin_lock(&host->xfer);
381 if (host->xfer_stop) {
382 host->xfer_stop = false;
383 spin_unlock(&host->xfer);
384 ret = -EINTR;
385 goto out;
386 }
387 spin_unlock(&host->xfer);
388 len = min(left, host->data_max);
389 nblocks = len / data->blksz;
390 len = nblocks * data->blksz;
391
392 if (data->flags & MMC_DATA_READ) {
393 ret = _gb_sdio_recv(host, data, len, nblocks, skip);
394 if (ret < 0)
395 goto out;
396 } else {
397 ret = _gb_sdio_send(host, data, len, nblocks, skip);
398 if (ret < 0)
399 goto out;
400 }
401 data->bytes_xfered += len;
402 left -= len;
403 skip += len;
404 }
405
406out:
407 data->error = ret;
408 return ret;
409}
410
411static int gb_sdio_command(struct gb_sdio_host *host, struct mmc_command *cmd)
412{
413 struct gb_sdio_command_request request = {0};
414 struct gb_sdio_command_response response;
415 struct mmc_data *data = host->mrq->data;
416 u8 cmd_flags;
417 u8 cmd_type;
418 int i;
419 int ret;
420
421 switch (mmc_resp_type(cmd)) {
422 case MMC_RSP_NONE:
423 cmd_flags = GB_SDIO_RSP_NONE;
424 break;
425 case MMC_RSP_R1:
426 cmd_flags = GB_SDIO_RSP_R1_R5_R6_R7;
427 break;
428 case MMC_RSP_R1B:
429 cmd_flags = GB_SDIO_RSP_R1B;
430 break;
431 case MMC_RSP_R2:
432 cmd_flags = GB_SDIO_RSP_R2;
433 break;
434 case MMC_RSP_R3:
435 cmd_flags = GB_SDIO_RSP_R3_R4;
436 break;
437 default:
438 dev_err(mmc_dev(host->mmc), "cmd flag invalid 0x%04x\n",
439 mmc_resp_type(cmd));
440 ret = -EINVAL;
441 goto out;
442 }
443
444 switch (mmc_cmd_type(cmd)) {
445 case MMC_CMD_BC:
446 cmd_type = GB_SDIO_CMD_BC;
447 break;
448 case MMC_CMD_BCR:
449 cmd_type = GB_SDIO_CMD_BCR;
450 break;
451 case MMC_CMD_AC:
452 cmd_type = GB_SDIO_CMD_AC;
453 break;
454 case MMC_CMD_ADTC:
455 cmd_type = GB_SDIO_CMD_ADTC;
456 break;
457 default:
458 dev_err(mmc_dev(host->mmc), "cmd type invalid 0x%04x\n",
459 mmc_cmd_type(cmd));
460 ret = -EINVAL;
461 goto out;
462 }
463
464 request.cmd = cmd->opcode;
465 request.cmd_flags = cmd_flags;
466 request.cmd_type = cmd_type;
467 request.cmd_arg = cpu_to_le32(cmd->arg);
468
469 if (data) {
470 request.data_blocks = cpu_to_le16(data->blocks);
471 request.data_blksz = cpu_to_le16(data->blksz);
472 }
473
474 ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_COMMAND,
475 &request, sizeof(request), &response,
476 sizeof(response));
477 if (ret < 0)
478 goto out;
479
480
481 if (cmd_flags == GB_SDIO_RSP_NONE)
482 goto out;
483
484
485 if (cmd_flags & GB_SDIO_RSP_R2)
486 for (i = 0; i < 4; i++)
487 cmd->resp[i] = le32_to_cpu(response.resp[i]);
488 else
489 cmd->resp[0] = le32_to_cpu(response.resp[0]);
490
491out:
492 cmd->error = ret;
493 return ret;
494}
495
496static void gb_sdio_mrq_work(struct work_struct *work)
497{
498 struct gb_sdio_host *host;
499 struct mmc_request *mrq;
500 int ret;
501
502 host = container_of(work, struct gb_sdio_host, mrqwork);
503
504 ret = gbphy_runtime_get_sync(host->gbphy_dev);
505 if (ret)
506 return;
507
508 mutex_lock(&host->lock);
509 mrq = host->mrq;
510 if (!mrq) {
511 mutex_unlock(&host->lock);
512 gbphy_runtime_put_autosuspend(host->gbphy_dev);
513 dev_err(mmc_dev(host->mmc), "mmc request is NULL");
514 return;
515 }
516
517 if (host->removed) {
518 mrq->cmd->error = -ESHUTDOWN;
519 goto done;
520 }
521
522 if (mrq->sbc) {
523 ret = gb_sdio_command(host, mrq->sbc);
524 if (ret < 0)
525 goto done;
526 }
527
528 ret = gb_sdio_command(host, mrq->cmd);
529 if (ret < 0)
530 goto done;
531
532 if (mrq->data) {
533 ret = gb_sdio_transfer(host, mrq->data);
534 if (ret < 0)
535 goto done;
536 }
537
538 if (mrq->stop) {
539 ret = gb_sdio_command(host, mrq->stop);
540 if (ret < 0)
541 goto done;
542 }
543
544done:
545 host->mrq = NULL;
546 mutex_unlock(&host->lock);
547 mmc_request_done(host->mmc, mrq);
548 gbphy_runtime_put_autosuspend(host->gbphy_dev);
549}
550
551static void gb_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
552{
553 struct gb_sdio_host *host = mmc_priv(mmc);
554 struct mmc_command *cmd = mrq->cmd;
555
556
557 if (cmd->opcode == MMC_STOP_TRANSMISSION) {
558 spin_lock(&host->xfer);
559 host->xfer_stop = true;
560 spin_unlock(&host->xfer);
561 }
562
563 mutex_lock(&host->lock);
564
565 WARN_ON(host->mrq);
566 host->mrq = mrq;
567
568 if (host->removed) {
569 mrq->cmd->error = -ESHUTDOWN;
570 goto out;
571 }
572 if (!host->card_present) {
573 mrq->cmd->error = -ENOMEDIUM;
574 goto out;
575 }
576
577 queue_work(host->mrq_workqueue, &host->mrqwork);
578
579 mutex_unlock(&host->lock);
580 return;
581
582out:
583 host->mrq = NULL;
584 mutex_unlock(&host->lock);
585 mmc_request_done(mmc, mrq);
586}
587
588static void gb_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
589{
590 struct gb_sdio_host *host = mmc_priv(mmc);
591 struct gb_sdio_set_ios_request request;
592 int ret;
593 u8 power_mode;
594 u8 bus_width;
595 u8 timing;
596 u8 signal_voltage;
597 u8 drv_type;
598 u32 vdd = 0;
599
600 mutex_lock(&host->lock);
601 request.clock = cpu_to_le32(ios->clock);
602
603 if (ios->vdd)
604 vdd = 1 << (ios->vdd - GB_SDIO_VDD_SHIFT);
605 request.vdd = cpu_to_le32(vdd);
606
607 request.bus_mode = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN ?
608 GB_SDIO_BUSMODE_OPENDRAIN :
609 GB_SDIO_BUSMODE_PUSHPULL);
610
611 switch (ios->power_mode) {
612 case MMC_POWER_OFF:
613 default:
614 power_mode = GB_SDIO_POWER_OFF;
615 break;
616 case MMC_POWER_UP:
617 power_mode = GB_SDIO_POWER_UP;
618 break;
619 case MMC_POWER_ON:
620 power_mode = GB_SDIO_POWER_ON;
621 break;
622 case MMC_POWER_UNDEFINED:
623 power_mode = GB_SDIO_POWER_UNDEFINED;
624 break;
625 }
626 request.power_mode = power_mode;
627
628 switch (ios->bus_width) {
629 case MMC_BUS_WIDTH_1:
630 bus_width = GB_SDIO_BUS_WIDTH_1;
631 break;
632 case MMC_BUS_WIDTH_4:
633 default:
634 bus_width = GB_SDIO_BUS_WIDTH_4;
635 break;
636 case MMC_BUS_WIDTH_8:
637 bus_width = GB_SDIO_BUS_WIDTH_8;
638 break;
639 }
640 request.bus_width = bus_width;
641
642 switch (ios->timing) {
643 case MMC_TIMING_LEGACY:
644 default:
645 timing = GB_SDIO_TIMING_LEGACY;
646 break;
647 case MMC_TIMING_MMC_HS:
648 timing = GB_SDIO_TIMING_MMC_HS;
649 break;
650 case MMC_TIMING_SD_HS:
651 timing = GB_SDIO_TIMING_SD_HS;
652 break;
653 case MMC_TIMING_UHS_SDR12:
654 timing = GB_SDIO_TIMING_UHS_SDR12;
655 break;
656 case MMC_TIMING_UHS_SDR25:
657 timing = GB_SDIO_TIMING_UHS_SDR25;
658 break;
659 case MMC_TIMING_UHS_SDR50:
660 timing = GB_SDIO_TIMING_UHS_SDR50;
661 break;
662 case MMC_TIMING_UHS_SDR104:
663 timing = GB_SDIO_TIMING_UHS_SDR104;
664 break;
665 case MMC_TIMING_UHS_DDR50:
666 timing = GB_SDIO_TIMING_UHS_DDR50;
667 break;
668 case MMC_TIMING_MMC_DDR52:
669 timing = GB_SDIO_TIMING_MMC_DDR52;
670 break;
671 case MMC_TIMING_MMC_HS200:
672 timing = GB_SDIO_TIMING_MMC_HS200;
673 break;
674 case MMC_TIMING_MMC_HS400:
675 timing = GB_SDIO_TIMING_MMC_HS400;
676 break;
677 }
678 request.timing = timing;
679
680 switch (ios->signal_voltage) {
681 case MMC_SIGNAL_VOLTAGE_330:
682 signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_330;
683 break;
684 case MMC_SIGNAL_VOLTAGE_180:
685 default:
686 signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_180;
687 break;
688 case MMC_SIGNAL_VOLTAGE_120:
689 signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_120;
690 break;
691 }
692 request.signal_voltage = signal_voltage;
693
694 switch (ios->drv_type) {
695 case MMC_SET_DRIVER_TYPE_A:
696 drv_type = GB_SDIO_SET_DRIVER_TYPE_A;
697 break;
698 case MMC_SET_DRIVER_TYPE_C:
699 drv_type = GB_SDIO_SET_DRIVER_TYPE_C;
700 break;
701 case MMC_SET_DRIVER_TYPE_D:
702 drv_type = GB_SDIO_SET_DRIVER_TYPE_D;
703 break;
704 case MMC_SET_DRIVER_TYPE_B:
705 default:
706 drv_type = GB_SDIO_SET_DRIVER_TYPE_B;
707 break;
708 }
709 request.drv_type = drv_type;
710
711 ret = gb_sdio_set_ios(host, &request);
712 if (ret < 0)
713 goto out;
714
715 memcpy(&mmc->ios, ios, sizeof(mmc->ios));
716
717out:
718 mutex_unlock(&host->lock);
719}
720
721static int gb_mmc_get_ro(struct mmc_host *mmc)
722{
723 struct gb_sdio_host *host = mmc_priv(mmc);
724
725 mutex_lock(&host->lock);
726 if (host->removed) {
727 mutex_unlock(&host->lock);
728 return -ESHUTDOWN;
729 }
730 mutex_unlock(&host->lock);
731
732 return host->read_only;
733}
734
735static int gb_mmc_get_cd(struct mmc_host *mmc)
736{
737 struct gb_sdio_host *host = mmc_priv(mmc);
738
739 mutex_lock(&host->lock);
740 if (host->removed) {
741 mutex_unlock(&host->lock);
742 return -ESHUTDOWN;
743 }
744 mutex_unlock(&host->lock);
745
746 return host->card_present;
747}
748
749static int gb_mmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
750{
751 return 0;
752}
753
754static const struct mmc_host_ops gb_sdio_ops = {
755 .request = gb_mmc_request,
756 .set_ios = gb_mmc_set_ios,
757 .get_ro = gb_mmc_get_ro,
758 .get_cd = gb_mmc_get_cd,
759 .start_signal_voltage_switch = gb_mmc_switch_voltage,
760};
761
762static int gb_sdio_probe(struct gbphy_device *gbphy_dev,
763 const struct gbphy_device_id *id)
764{
765 struct gb_connection *connection;
766 struct mmc_host *mmc;
767 struct gb_sdio_host *host;
768 int ret = 0;
769
770 mmc = mmc_alloc_host(sizeof(*host), &gbphy_dev->dev);
771 if (!mmc)
772 return -ENOMEM;
773
774 connection = gb_connection_create(gbphy_dev->bundle,
775 le16_to_cpu(gbphy_dev->cport_desc->id),
776 gb_sdio_request_handler);
777 if (IS_ERR(connection)) {
778 ret = PTR_ERR(connection);
779 goto exit_mmc_free;
780 }
781
782 host = mmc_priv(mmc);
783 host->mmc = mmc;
784 host->removed = true;
785
786 host->connection = connection;
787 gb_connection_set_data(connection, host);
788 host->gbphy_dev = gbphy_dev;
789 gb_gbphy_set_data(gbphy_dev, host);
790
791 ret = gb_connection_enable_tx(connection);
792 if (ret)
793 goto exit_connection_destroy;
794
795 ret = gb_sdio_get_caps(host);
796 if (ret < 0)
797 goto exit_connection_disable;
798
799 mmc->ops = &gb_sdio_ops;
800
801 mmc->max_segs = host->mmc->max_blk_count;
802
803
804 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
805 mmc->max_seg_size = mmc->max_req_size;
806
807 mutex_init(&host->lock);
808 spin_lock_init(&host->xfer);
809 host->mrq_workqueue = alloc_workqueue("mmc-%s", 0, 1,
810 dev_name(&gbphy_dev->dev));
811 if (!host->mrq_workqueue) {
812 ret = -ENOMEM;
813 goto exit_connection_disable;
814 }
815 INIT_WORK(&host->mrqwork, gb_sdio_mrq_work);
816
817 ret = gb_connection_enable(connection);
818 if (ret)
819 goto exit_wq_destroy;
820
821 ret = mmc_add_host(mmc);
822 if (ret < 0)
823 goto exit_wq_destroy;
824 host->removed = false;
825 ret = _gb_sdio_process_events(host, host->queued_events);
826 host->queued_events = 0;
827
828 gbphy_runtime_put_autosuspend(gbphy_dev);
829
830 return ret;
831
832exit_wq_destroy:
833 destroy_workqueue(host->mrq_workqueue);
834exit_connection_disable:
835 gb_connection_disable(connection);
836exit_connection_destroy:
837 gb_connection_destroy(connection);
838exit_mmc_free:
839 mmc_free_host(mmc);
840
841 return ret;
842}
843
844static void gb_sdio_remove(struct gbphy_device *gbphy_dev)
845{
846 struct gb_sdio_host *host = gb_gbphy_get_data(gbphy_dev);
847 struct gb_connection *connection = host->connection;
848 struct mmc_host *mmc;
849 int ret;
850
851 ret = gbphy_runtime_get_sync(gbphy_dev);
852 if (ret)
853 gbphy_runtime_get_noresume(gbphy_dev);
854
855 mutex_lock(&host->lock);
856 host->removed = true;
857 mmc = host->mmc;
858 gb_connection_set_data(connection, NULL);
859 mutex_unlock(&host->lock);
860
861 flush_workqueue(host->mrq_workqueue);
862 destroy_workqueue(host->mrq_workqueue);
863 gb_connection_disable_rx(connection);
864 mmc_remove_host(mmc);
865 gb_connection_disable(connection);
866 gb_connection_destroy(connection);
867 mmc_free_host(mmc);
868}
869
870static const struct gbphy_device_id gb_sdio_id_table[] = {
871 { GBPHY_PROTOCOL(GREYBUS_PROTOCOL_SDIO) },
872 { },
873};
874MODULE_DEVICE_TABLE(gbphy, gb_sdio_id_table);
875
876static struct gbphy_driver sdio_driver = {
877 .name = "sdio",
878 .probe = gb_sdio_probe,
879 .remove = gb_sdio_remove,
880 .id_table = gb_sdio_id_table,
881};
882
883module_gbphy_driver(sdio_driver);
884MODULE_LICENSE("GPL v2");
885
