2 * SD/MMC Greybus driver.
4 * Copyright 2014-2015 Google Inc.
5 * Copyright 2014-2015 Linaro Ltd.
7 * Released under the GPLv2 only.
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>
21 struct gb_connection *connection;
22 struct gbphy_device *gbphy_dev;
24 struct mmc_request *mrq;
25 struct mutex lock; /* lock for this host */
27 spinlock_t xfer; /* lock to cancel ongoing transfer */
29 struct workqueue_struct *mrq_workqueue;
30 struct work_struct mrqwork;
38 #define GB_SDIO_RSP_R1_R5_R6_R7 (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
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 | \
43 #define GB_SDIO_RSP_R1B (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \
44 GB_SDIO_RSP_OPCODE | GB_SDIO_RSP_BUSY)
46 /* kernel vdd starts at 0x80 and we need to translate to greybus ones 0x01 */
47 #define GB_SDIO_VDD_SHIFT 8
49 #ifndef MMC_CAP2_CORE_RUNTIME_PM
50 #define MMC_CAP2_CORE_RUNTIME_PM 0
53 static inline bool single_op(struct mmc_command *cmd)
55 u32 opcode = cmd->opcode;
57 return opcode == MMC_WRITE_BLOCK ||
58 opcode == MMC_READ_SINGLE_BLOCK;
61 static void _gb_sdio_set_host_caps(struct gb_sdio_host *host, u32 r)
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);
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);
89 host->mmc->caps = caps;
90 host->mmc->caps2 = caps2 | MMC_CAP2_CORE_RUNTIME_PM;
92 if (caps & MMC_CAP_NONREMOVABLE)
93 host->card_present = true;
96 static u32 _gb_sdio_get_host_ocr(u32 ocr)
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)
118 static int gb_sdio_get_caps(struct gb_sdio_host *host)
120 struct gb_sdio_get_caps_response response;
121 struct mmc_host *mmc = host->mmc;
128 ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_GET_CAPABILITIES,
129 NULL, 0, &response, sizeof(response));
132 r = le32_to_cpu(response.caps);
134 _gb_sdio_set_host_caps(host, r);
136 /* get the max block size that could fit our payload */
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));
141 blksz = min_t(u16, le16_to_cpu(response.max_blk_size), data_max);
142 blksz = max_t(u32, 512, blksz);
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;
148 /* get ocr supported values */
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;
155 /* get frequency range values */
156 mmc->f_min = le32_to_cpu(response.f_min);
157 mmc->f_max = le32_to_cpu(response.f_max);
162 static void _gb_queue_event(struct gb_sdio_host *host, u8 event)
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;
169 host->queued_events |= event;
172 static int _gb_sdio_process_events(struct gb_sdio_host *host, u8 event)
174 u8 state_changed = 0;
176 if (event & GB_SDIO_CARD_INSERTED) {
177 if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
179 if (host->card_present)
181 host->card_present = true;
185 if (event & GB_SDIO_CARD_REMOVED) {
186 if (host->mmc->caps & MMC_CAP_NONREMOVABLE)
188 if (!(host->card_present))
190 host->card_present = false;
194 if (event & GB_SDIO_WP)
195 host->read_only = true;
198 dev_info(mmc_dev(host->mmc), "card %s now event\n",
199 (host->card_present ? "inserted" : "removed"));
200 mmc_detect_change(host->mmc, 0);
206 static int gb_sdio_request_handler(struct gb_operation *op)
208 struct gb_sdio_host *host = gb_connection_get_data(op->connection);
209 struct gb_message *request;
210 struct gb_sdio_event_request *payload;
215 if (type != GB_SDIO_TYPE_EVENT) {
216 dev_err(mmc_dev(host->mmc),
217 "unsupported unsolicited event: %u\n", type);
221 request = op->request;
223 if (request->payload_size < sizeof(*payload)) {
224 dev_err(mmc_dev(host->mmc), "wrong event size received (%zu < %zu)\n",
225 request->payload_size, sizeof(*payload));
229 payload = request->payload;
230 event = payload->event;
233 _gb_queue_event(host, event);
235 ret = _gb_sdio_process_events(host, event);
240 static int gb_sdio_set_ios(struct gb_sdio_host *host,
241 struct gb_sdio_set_ios_request *request)
245 ret = gbphy_runtime_get_sync(host->gbphy_dev);
249 ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_SET_IOS, request,
250 sizeof(*request), NULL, 0);
252 gbphy_runtime_put_autosuspend(host->gbphy_dev);
257 static int _gb_sdio_send(struct gb_sdio_host *host, struct mmc_data *data,
258 size_t len, u16 nblocks, off_t skip)
260 struct gb_sdio_transfer_request *request;
261 struct gb_sdio_transfer_response *response;
262 struct gb_operation *operation;
263 struct scatterlist *sg = data->sg;
264 unsigned int sg_len = data->sg_len;
270 WARN_ON(len > host->data_max);
272 operation = gb_operation_create(host->connection, GB_SDIO_TYPE_TRANSFER,
273 len + sizeof(*request),
274 sizeof(*response), GFP_KERNEL);
278 request = operation->request->payload;
279 request->data_flags = (data->flags >> 8);
280 request->data_blocks = cpu_to_le16(nblocks);
281 request->data_blksz = cpu_to_le16(data->blksz);
283 copied = sg_pcopy_to_buffer(sg, sg_len, &request->data[0], len, skip);
287 goto err_put_operation;
290 ret = gb_operation_request_send_sync(operation);
292 goto err_put_operation;
294 response = operation->response->payload;
296 send_blocks = le16_to_cpu(response->data_blocks);
297 send_blksz = le16_to_cpu(response->data_blksz);
299 if (len != send_blksz * send_blocks) {
300 dev_err(mmc_dev(host->mmc), "send: size received: %zu != %d\n",
301 len, send_blksz * send_blocks);
306 gb_operation_put(operation);
311 static int _gb_sdio_recv(struct gb_sdio_host *host, struct mmc_data *data,
312 size_t len, u16 nblocks, off_t skip)
314 struct gb_sdio_transfer_request *request;
315 struct gb_sdio_transfer_response *response;
316 struct gb_operation *operation;
317 struct scatterlist *sg = data->sg;
318 unsigned int sg_len = data->sg_len;
324 WARN_ON(len > host->data_max);
326 operation = gb_operation_create(host->connection, GB_SDIO_TYPE_TRANSFER,
328 len + sizeof(*response), GFP_KERNEL);
332 request = operation->request->payload;
333 request->data_flags = (data->flags >> 8);
334 request->data_blocks = cpu_to_le16(nblocks);
335 request->data_blksz = cpu_to_le16(data->blksz);
337 ret = gb_operation_request_send_sync(operation);
339 goto err_put_operation;
341 response = operation->response->payload;
342 recv_blocks = le16_to_cpu(response->data_blocks);
343 recv_blksz = le16_to_cpu(response->data_blksz);
345 if (len != recv_blksz * recv_blocks) {
346 dev_err(mmc_dev(host->mmc), "recv: size received: %d != %zu\n",
347 recv_blksz * recv_blocks, len);
349 goto err_put_operation;
352 copied = sg_pcopy_from_buffer(sg, sg_len, &response->data[0], len,
358 gb_operation_put(operation);
363 static int gb_sdio_transfer(struct gb_sdio_host *host, struct mmc_data *data)
370 if (single_op(data->mrq->cmd) && data->blocks > 1) {
375 left = data->blksz * data->blocks;
378 /* check is a stop transmission is pending */
379 spin_lock(&host->xfer);
380 if (host->xfer_stop) {
381 host->xfer_stop = false;
382 spin_unlock(&host->xfer);
386 spin_unlock(&host->xfer);
387 len = min(left, host->data_max);
388 nblocks = len / data->blksz;
389 len = nblocks * data->blksz;
391 if (data->flags & MMC_DATA_READ) {
392 ret = _gb_sdio_recv(host, data, len, nblocks, skip);
396 ret = _gb_sdio_send(host, data, len, nblocks, skip);
400 data->bytes_xfered += len;
410 static int gb_sdio_command(struct gb_sdio_host *host, struct mmc_command *cmd)
412 struct gb_sdio_command_request request = {0};
413 struct gb_sdio_command_response response;
414 struct mmc_data *data = host->mrq->data;
415 unsigned int timeout_ms;
421 switch (mmc_resp_type(cmd)) {
423 cmd_flags = GB_SDIO_RSP_NONE;
426 cmd_flags = GB_SDIO_RSP_R1_R5_R6_R7;
429 cmd_flags = GB_SDIO_RSP_R1B;
432 cmd_flags = GB_SDIO_RSP_R2;
435 cmd_flags = GB_SDIO_RSP_R3_R4;
438 dev_err(mmc_dev(host->mmc), "cmd flag invalid 0x%04x\n",
444 switch (mmc_cmd_type(cmd)) {
446 cmd_type = GB_SDIO_CMD_BC;
449 cmd_type = GB_SDIO_CMD_BCR;
452 cmd_type = GB_SDIO_CMD_AC;
455 cmd_type = GB_SDIO_CMD_ADTC;
458 dev_err(mmc_dev(host->mmc), "cmd type invalid 0x%04x\n",
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 /* some controllers need to know at command time data details */
470 request.data_blocks = cpu_to_le16(data->blocks);
471 request.data_blksz = cpu_to_le16(data->blksz);
474 timeout_ms = cmd->busy_timeout ? cmd->busy_timeout :
475 GB_OPERATION_TIMEOUT_DEFAULT;
477 ret = gb_operation_sync_timeout(host->connection, GB_SDIO_TYPE_COMMAND,
478 &request, sizeof(request), &response,
479 sizeof(response), timeout_ms);
483 /* no response expected */
484 if (cmd_flags == GB_SDIO_RSP_NONE)
487 /* long response expected */
488 if (cmd_flags & GB_SDIO_RSP_R2)
489 for (i = 0; i < 4; i++)
490 cmd->resp[i] = le32_to_cpu(response.resp[i]);
492 cmd->resp[0] = le32_to_cpu(response.resp[0]);
499 static void gb_sdio_mrq_work(struct work_struct *work)
501 struct gb_sdio_host *host;
502 struct mmc_request *mrq;
505 host = container_of(work, struct gb_sdio_host, mrqwork);
507 ret = gbphy_runtime_get_sync(host->gbphy_dev);
511 mutex_lock(&host->lock);
514 mutex_unlock(&host->lock);
515 gbphy_runtime_put_autosuspend(host->gbphy_dev);
516 dev_err(mmc_dev(host->mmc), "mmc request is NULL");
521 mrq->cmd->error = -ESHUTDOWN;
526 ret = gb_sdio_command(host, mrq->sbc);
531 ret = gb_sdio_command(host, mrq->cmd);
536 ret = gb_sdio_transfer(host, mrq->data);
542 ret = gb_sdio_command(host, mrq->stop);
549 mutex_unlock(&host->lock);
550 mmc_request_done(host->mmc, mrq);
551 gbphy_runtime_put_autosuspend(host->gbphy_dev);
554 static void gb_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
556 struct gb_sdio_host *host = mmc_priv(mmc);
557 struct mmc_command *cmd = mrq->cmd;
559 /* Check if it is a cancel to ongoing transfer */
560 if (cmd->opcode == MMC_STOP_TRANSMISSION) {
561 spin_lock(&host->xfer);
562 host->xfer_stop = true;
563 spin_unlock(&host->xfer);
566 mutex_lock(&host->lock);
572 mrq->cmd->error = -ESHUTDOWN;
575 if (!host->card_present) {
576 mrq->cmd->error = -ENOMEDIUM;
580 queue_work(host->mrq_workqueue, &host->mrqwork);
582 mutex_unlock(&host->lock);
587 mutex_unlock(&host->lock);
588 mmc_request_done(mmc, mrq);
591 static void gb_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
593 struct gb_sdio_host *host = mmc_priv(mmc);
594 struct gb_sdio_set_ios_request request;
603 mutex_lock(&host->lock);
604 request.clock = cpu_to_le32(ios->clock);
607 vdd = 1 << (ios->vdd - GB_SDIO_VDD_SHIFT);
608 request.vdd = cpu_to_le32(vdd);
610 request.bus_mode = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN ?
611 GB_SDIO_BUSMODE_OPENDRAIN :
612 GB_SDIO_BUSMODE_PUSHPULL);
614 switch (ios->power_mode) {
617 power_mode = GB_SDIO_POWER_OFF;
620 power_mode = GB_SDIO_POWER_UP;
623 power_mode = GB_SDIO_POWER_ON;
625 case MMC_POWER_UNDEFINED:
626 power_mode = GB_SDIO_POWER_UNDEFINED;
629 request.power_mode = power_mode;
631 switch (ios->bus_width) {
632 case MMC_BUS_WIDTH_1:
633 bus_width = GB_SDIO_BUS_WIDTH_1;
635 case MMC_BUS_WIDTH_4:
637 bus_width = GB_SDIO_BUS_WIDTH_4;
639 case MMC_BUS_WIDTH_8:
640 bus_width = GB_SDIO_BUS_WIDTH_8;
643 request.bus_width = bus_width;
645 switch (ios->timing) {
646 case MMC_TIMING_LEGACY:
648 timing = GB_SDIO_TIMING_LEGACY;
650 case MMC_TIMING_MMC_HS:
651 timing = GB_SDIO_TIMING_MMC_HS;
653 case MMC_TIMING_SD_HS:
654 timing = GB_SDIO_TIMING_SD_HS;
656 case MMC_TIMING_UHS_SDR12:
657 timing = GB_SDIO_TIMING_UHS_SDR12;
659 case MMC_TIMING_UHS_SDR25:
660 timing = GB_SDIO_TIMING_UHS_SDR25;
662 case MMC_TIMING_UHS_SDR50:
663 timing = GB_SDIO_TIMING_UHS_SDR50;
665 case MMC_TIMING_UHS_SDR104:
666 timing = GB_SDIO_TIMING_UHS_SDR104;
668 case MMC_TIMING_UHS_DDR50:
669 timing = GB_SDIO_TIMING_UHS_DDR50;
671 case MMC_TIMING_MMC_DDR52:
672 timing = GB_SDIO_TIMING_MMC_DDR52;
674 case MMC_TIMING_MMC_HS200:
675 timing = GB_SDIO_TIMING_MMC_HS200;
677 case MMC_TIMING_MMC_HS400:
678 timing = GB_SDIO_TIMING_MMC_HS400;
681 request.timing = timing;
683 switch (ios->signal_voltage) {
684 case MMC_SIGNAL_VOLTAGE_330:
685 signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_330;
687 case MMC_SIGNAL_VOLTAGE_180:
689 signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_180;
691 case MMC_SIGNAL_VOLTAGE_120:
692 signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_120;
695 request.signal_voltage = signal_voltage;
697 switch (ios->drv_type) {
698 case MMC_SET_DRIVER_TYPE_A:
699 drv_type = GB_SDIO_SET_DRIVER_TYPE_A;
701 case MMC_SET_DRIVER_TYPE_C:
702 drv_type = GB_SDIO_SET_DRIVER_TYPE_C;
704 case MMC_SET_DRIVER_TYPE_D:
705 drv_type = GB_SDIO_SET_DRIVER_TYPE_D;
707 case MMC_SET_DRIVER_TYPE_B:
709 drv_type = GB_SDIO_SET_DRIVER_TYPE_B;
712 request.drv_type = drv_type;
714 ret = gb_sdio_set_ios(host, &request);
718 memcpy(&mmc->ios, ios, sizeof(mmc->ios));
721 mutex_unlock(&host->lock);
724 static int gb_mmc_get_ro(struct mmc_host *mmc)
726 struct gb_sdio_host *host = mmc_priv(mmc);
728 mutex_lock(&host->lock);
730 mutex_unlock(&host->lock);
733 mutex_unlock(&host->lock);
735 return host->read_only;
738 static int gb_mmc_get_cd(struct mmc_host *mmc)
740 struct gb_sdio_host *host = mmc_priv(mmc);
742 mutex_lock(&host->lock);
744 mutex_unlock(&host->lock);
747 mutex_unlock(&host->lock);
749 return host->card_present;
752 static int gb_mmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
757 static const struct mmc_host_ops gb_sdio_ops = {
758 .request = gb_mmc_request,
759 .set_ios = gb_mmc_set_ios,
760 .get_ro = gb_mmc_get_ro,
761 .get_cd = gb_mmc_get_cd,
762 .start_signal_voltage_switch = gb_mmc_switch_voltage,
765 static int gb_sdio_probe(struct gbphy_device *gbphy_dev,
766 const struct gbphy_device_id *id)
768 struct gb_connection *connection;
769 struct mmc_host *mmc;
770 struct gb_sdio_host *host;
773 mmc = mmc_alloc_host(sizeof(*host), &gbphy_dev->dev);
777 connection = gb_connection_create(gbphy_dev->bundle,
778 le16_to_cpu(gbphy_dev->cport_desc->id),
779 gb_sdio_request_handler);
780 if (IS_ERR(connection)) {
781 ret = PTR_ERR(connection);
785 host = mmc_priv(mmc);
787 host->removed = true;
789 host->connection = connection;
790 gb_connection_set_data(connection, host);
791 host->gbphy_dev = gbphy_dev;
792 gb_gbphy_set_data(gbphy_dev, host);
794 ret = gb_connection_enable_tx(connection);
796 goto exit_connection_destroy;
798 ret = gb_sdio_get_caps(host);
800 goto exit_connection_disable;
802 mmc->ops = &gb_sdio_ops;
804 mmc->max_segs = host->mmc->max_blk_count;
806 /* for now we make a map 1:1 between max request and segment size */
807 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
808 mmc->max_seg_size = mmc->max_req_size;
810 mutex_init(&host->lock);
811 spin_lock_init(&host->xfer);
812 host->mrq_workqueue = alloc_workqueue("mmc-%s", 0, 1,
813 dev_name(&gbphy_dev->dev));
814 if (!host->mrq_workqueue) {
816 goto exit_connection_disable;
818 INIT_WORK(&host->mrqwork, gb_sdio_mrq_work);
820 ret = gb_connection_enable(connection);
822 goto exit_wq_destroy;
824 ret = mmc_add_host(mmc);
826 goto exit_wq_destroy;
827 host->removed = false;
828 ret = _gb_sdio_process_events(host, host->queued_events);
829 host->queued_events = 0;
831 gbphy_runtime_put_autosuspend(gbphy_dev);
836 destroy_workqueue(host->mrq_workqueue);
837 exit_connection_disable:
838 gb_connection_disable(connection);
839 exit_connection_destroy:
840 gb_connection_destroy(connection);
847 static void gb_sdio_remove(struct gbphy_device *gbphy_dev)
849 struct gb_sdio_host *host = gb_gbphy_get_data(gbphy_dev);
850 struct gb_connection *connection = host->connection;
851 struct mmc_host *mmc;
854 ret = gbphy_runtime_get_sync(gbphy_dev);
856 gbphy_runtime_get_noresume(gbphy_dev);
858 mutex_lock(&host->lock);
859 host->removed = true;
861 gb_connection_set_data(connection, NULL);
862 mutex_unlock(&host->lock);
864 flush_workqueue(host->mrq_workqueue);
865 destroy_workqueue(host->mrq_workqueue);
866 gb_connection_disable_rx(connection);
867 mmc_remove_host(mmc);
868 gb_connection_disable(connection);
869 gb_connection_destroy(connection);
873 static const struct gbphy_device_id gb_sdio_id_table[] = {
874 { GBPHY_PROTOCOL(GREYBUS_PROTOCOL_SDIO) },
877 MODULE_DEVICE_TABLE(gbphy, gb_sdio_id_table);
879 static struct gbphy_driver sdio_driver = {
881 .probe = gb_sdio_probe,
882 .remove = gb_sdio_remove,
883 .id_table = gb_sdio_id_table,
886 module_gbphy_driver(sdio_driver);
887 MODULE_LICENSE("GPL v2");