Lines Matching full:host
30 #include <linux/mmc/host.h>
41 #include "host.h"
49 /* The max erase timeout, used when host->max_busy_timeout isn't specified */
81 static void mmc_should_fail_request(struct mmc_host *host, in mmc_should_fail_request() argument
96 !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) in mmc_should_fail_request()
105 static inline void mmc_should_fail_request(struct mmc_host *host, in mmc_should_fail_request() argument
118 void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq) in mmc_command_done() argument
126 mmc_hostname(host), mrq->cmd->opcode); in mmc_command_done()
132 * @host: MMC host which completed request
138 void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) in mmc_request_done() argument
146 !host->retune_crc_disable && in mmc_request_done()
150 mmc_retune_needed(host); in mmc_request_done()
152 if (err && cmd->retries && mmc_host_is_spi(host)) { in mmc_request_done()
157 if (host->ongoing_mrq == mrq) in mmc_request_done()
158 host->ongoing_mrq = NULL; in mmc_request_done()
162 trace_mmc_request_done(host, mrq); in mmc_request_done()
173 if (!err || !cmd->retries || mmc_card_removed(host->card)) { in mmc_request_done()
174 mmc_should_fail_request(host, mrq); in mmc_request_done()
176 if (!host->ongoing_mrq) in mmc_request_done()
177 led_trigger_event(host->led, LED_OFF); in mmc_request_done()
181 mmc_hostname(host), mrq->sbc->opcode, in mmc_request_done()
188 mmc_hostname(host), cmd->opcode, err, in mmc_request_done()
194 mmc_hostname(host), in mmc_request_done()
200 mmc_hostname(host), mrq->stop->opcode, in mmc_request_done()
216 static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) in __mmc_start_request() argument
220 /* Assumes host controller has been runtime resumed by mmc_claim_host */ in __mmc_start_request()
221 err = mmc_retune(host); in __mmc_start_request()
224 mmc_request_done(host, mrq); in __mmc_start_request()
234 host->ops->card_busy) { in __mmc_start_request()
237 while (host->ops->card_busy(host) && --tries) in __mmc_start_request()
242 mmc_request_done(host, mrq); in __mmc_start_request()
248 host->ongoing_mrq = mrq; in __mmc_start_request()
256 trace_mmc_request_start(host, mrq); in __mmc_start_request()
258 if (host->cqe_on) in __mmc_start_request()
259 host->cqe_ops->cqe_off(host); in __mmc_start_request()
261 host->ops->request(host, mrq); in __mmc_start_request()
264 static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq, in mmc_mrq_pr_debug() argument
269 mmc_hostname(host), mrq->sbc->opcode, in mmc_mrq_pr_debug()
275 mmc_hostname(host), cqe ? "CQE direct " : "", in mmc_mrq_pr_debug()
279 mmc_hostname(host), mrq->tag, mrq->data->blk_addr); in mmc_mrq_pr_debug()
285 mmc_hostname(host), mrq->data->blksz, in mmc_mrq_pr_debug()
293 mmc_hostname(host), mrq->stop->opcode, in mmc_mrq_pr_debug()
298 static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq) in mmc_mrq_prep() argument
313 if (mrq->data->blksz > host->max_blk_size || in mmc_mrq_prep()
314 mrq->data->blocks > host->max_blk_count || in mmc_mrq_prep()
315 mrq->data->blocks * mrq->data->blksz > host->max_req_size) in mmc_mrq_prep()
335 int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) in mmc_start_request() argument
341 mmc_retune_hold(host); in mmc_start_request()
343 if (mmc_card_removed(host->card)) in mmc_start_request()
346 mmc_mrq_pr_debug(host, mrq, false); in mmc_start_request()
348 WARN_ON(!host->claimed); in mmc_start_request()
350 err = mmc_mrq_prep(host, mrq); in mmc_start_request()
354 led_trigger_event(host->led, LED_FULL); in mmc_start_request()
355 __mmc_start_request(host, mrq); in mmc_start_request()
366 static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) in mmc_wait_ongoing_tfr_cmd() argument
368 struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq); in mmc_wait_ongoing_tfr_cmd()
378 static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) in __mmc_start_req() argument
382 mmc_wait_ongoing_tfr_cmd(host); in __mmc_start_req()
387 err = mmc_start_request(host, mrq); in __mmc_start_req()
397 void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) in mmc_wait_for_req_done() argument
407 mmc_card_removed(host->card)) in mmc_wait_for_req_done()
410 mmc_retune_recheck(host); in mmc_wait_for_req_done()
413 mmc_hostname(host), cmd->opcode, cmd->error); in mmc_wait_for_req_done()
416 __mmc_start_request(host, mrq); in mmc_wait_for_req_done()
419 mmc_retune_release(host); in mmc_wait_for_req_done()
425 * @host: MMC host to start the request
431 int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) in mmc_cqe_start_req() argument
441 err = mmc_retune(host); in mmc_cqe_start_req()
445 mrq->host = host; in mmc_cqe_start_req()
447 mmc_mrq_pr_debug(host, mrq, true); in mmc_cqe_start_req()
449 err = mmc_mrq_prep(host, mrq); in mmc_cqe_start_req()
453 err = host->cqe_ops->cqe_request(host, mrq); in mmc_cqe_start_req()
457 trace_mmc_request_start(host, mrq); in mmc_cqe_start_req()
464 mmc_hostname(host), mrq->cmd->opcode, err); in mmc_cqe_start_req()
467 mmc_hostname(host), mrq->tag, err); in mmc_cqe_start_req()
475 * @host: MMC host which completed request
481 void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq) in mmc_cqe_request_done() argument
483 mmc_should_fail_request(host, mrq); in mmc_cqe_request_done()
488 mmc_retune_needed(host); in mmc_cqe_request_done()
490 trace_mmc_request_done(host, mrq); in mmc_cqe_request_done()
494 mmc_hostname(host), mrq->cmd->opcode, mrq->cmd->error); in mmc_cqe_request_done()
497 mmc_hostname(host), mrq->tag); in mmc_cqe_request_done()
502 mmc_hostname(host), in mmc_cqe_request_done()
512 * @host: MMC host
515 void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq) in mmc_cqe_post_req() argument
517 if (host->cqe_ops->cqe_post_req) in mmc_cqe_post_req()
518 host->cqe_ops->cqe_post_req(host, mrq); in mmc_cqe_post_req()
527 * @host: MMC host to recover
534 int mmc_cqe_recovery(struct mmc_host *host) in mmc_cqe_recovery() argument
539 mmc_retune_hold_now(host); in mmc_cqe_recovery()
545 pr_warn("%s: running CQE recovery\n", mmc_hostname(host)); in mmc_cqe_recovery()
547 host->cqe_ops->cqe_recovery_start(host); in mmc_cqe_recovery()
554 mmc_wait_for_cmd(host, &cmd, 0); in mmc_cqe_recovery()
562 err = mmc_wait_for_cmd(host, &cmd, 0); in mmc_cqe_recovery()
564 host->cqe_ops->cqe_recovery_finish(host); in mmc_cqe_recovery()
566 mmc_retune_release(host); in mmc_cqe_recovery()
574 * @host: MMC host
584 bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) in mmc_is_req_done() argument
592 * @host: MMC host to start command
595 * Start a new MMC custom command request for a host, and wait
602 void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) in mmc_wait_for_req() argument
604 __mmc_start_req(host, mrq); in mmc_wait_for_req()
607 mmc_wait_for_req_done(host, mrq); in mmc_wait_for_req()
613 * @host: MMC host to start command
617 * Start a new MMC command for a host, and wait for the command
621 int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) in mmc_wait_for_cmd() argument
625 WARN_ON(!host->claimed); in mmc_wait_for_cmd()
633 mmc_wait_for_req(host, &mrq); in mmc_wait_for_cmd()
683 if (card->host->ios.clock) in mmc_set_data_timeout()
685 (card->host->ios.clock / 1000); in mmc_set_data_timeout()
730 if (mmc_host_is_spi(card->host)) { in mmc_set_data_timeout()
743 * Allow claiming an already claimed host if the context is the same or there is
746 static inline bool mmc_ctx_matches(struct mmc_host *host, struct mmc_ctx *ctx, in mmc_ctx_matches() argument
749 return host->claimer == ctx || in mmc_ctx_matches()
750 (!ctx && task && host->claimer->task == task); in mmc_ctx_matches()
753 static inline void mmc_ctx_set_claimer(struct mmc_host *host, in mmc_ctx_set_claimer() argument
757 if (!host->claimer) { in mmc_ctx_set_claimer()
759 host->claimer = ctx; in mmc_ctx_set_claimer()
761 host->claimer = &host->default_ctx; in mmc_ctx_set_claimer()
764 host->claimer->task = task; in mmc_ctx_set_claimer()
768 * __mmc_claim_host - exclusively claim a host
769 * @host: mmc host to claim
770 * @ctx: context that claims the host or NULL in which case the default
774 * Claim a host for a set of operations. If @abort is non null and
779 int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx, in __mmc_claim_host() argument
790 add_wait_queue(&host->wq, &wait); in __mmc_claim_host()
791 spin_lock_irqsave(&host->lock, flags); in __mmc_claim_host()
795 if (stop || !host->claimed || mmc_ctx_matches(host, ctx, task)) in __mmc_claim_host()
797 spin_unlock_irqrestore(&host->lock, flags); in __mmc_claim_host()
799 spin_lock_irqsave(&host->lock, flags); in __mmc_claim_host()
803 host->claimed = 1; in __mmc_claim_host()
804 mmc_ctx_set_claimer(host, ctx, task); in __mmc_claim_host()
805 host->claim_cnt += 1; in __mmc_claim_host()
806 if (host->claim_cnt == 1) in __mmc_claim_host()
809 wake_up(&host->wq); in __mmc_claim_host()
810 spin_unlock_irqrestore(&host->lock, flags); in __mmc_claim_host()
811 remove_wait_queue(&host->wq, &wait); in __mmc_claim_host()
814 pm_runtime_get_sync(mmc_dev(host)); in __mmc_claim_host()
821 * mmc_release_host - release a host
822 * @host: mmc host to release
824 * Release a MMC host, allowing others to claim the host
827 void mmc_release_host(struct mmc_host *host) in mmc_release_host() argument
831 WARN_ON(!host->claimed); in mmc_release_host()
833 spin_lock_irqsave(&host->lock, flags); in mmc_release_host()
834 if (--host->claim_cnt) { in mmc_release_host()
836 spin_unlock_irqrestore(&host->lock, flags); in mmc_release_host()
838 host->claimed = 0; in mmc_release_host()
839 host->claimer->task = NULL; in mmc_release_host()
840 host->claimer = NULL; in mmc_release_host()
841 spin_unlock_irqrestore(&host->lock, flags); in mmc_release_host()
842 wake_up(&host->wq); in mmc_release_host()
843 pm_runtime_mark_last_busy(mmc_dev(host)); in mmc_release_host()
844 if (host->caps & MMC_CAP_SYNC_RUNTIME_PM) in mmc_release_host()
845 pm_runtime_put_sync_suspend(mmc_dev(host)); in mmc_release_host()
847 pm_runtime_put_autosuspend(mmc_dev(host)); in mmc_release_host()
854 * card device and also claims the host.
859 __mmc_claim_host(card->host, ctx, NULL); in mmc_get_card()
864 * This is a helper function, which releases the host and drops the runtime
869 struct mmc_host *host = card->host; in mmc_put_card() local
871 WARN_ON(ctx && host->claimer != ctx); in mmc_put_card()
873 mmc_release_host(host); in mmc_put_card()
880 * Internal function that does the actual ios call to the host driver,
883 static inline void mmc_set_ios(struct mmc_host *host) in mmc_set_ios() argument
885 struct mmc_ios *ios = &host->ios; in mmc_set_ios()
889 mmc_hostname(host), ios->clock, ios->bus_mode, in mmc_set_ios()
893 host->ops->set_ios(host, ios); in mmc_set_ios()
897 * Control chip select pin on a host.
899 void mmc_set_chip_select(struct mmc_host *host, int mode) in mmc_set_chip_select() argument
901 host->ios.chip_select = mode; in mmc_set_chip_select()
902 mmc_set_ios(host); in mmc_set_chip_select()
906 * Sets the host clock to the highest possible frequency that
909 void mmc_set_clock(struct mmc_host *host, unsigned int hz) in mmc_set_clock() argument
911 WARN_ON(hz && hz < host->f_min); in mmc_set_clock()
913 if (hz > host->f_max) in mmc_set_clock()
914 hz = host->f_max; in mmc_set_clock()
916 host->ios.clock = hz; in mmc_set_clock()
917 mmc_set_ios(host); in mmc_set_clock()
922 struct mmc_host *host = card->host; in mmc_execute_tuning() local
926 if (!host->ops->execute_tuning) in mmc_execute_tuning()
929 if (host->cqe_on) in mmc_execute_tuning()
930 host->cqe_ops->cqe_off(host); in mmc_execute_tuning()
937 err = host->ops->execute_tuning(host, opcode); in mmc_execute_tuning()
941 mmc_hostname(host), err); in mmc_execute_tuning()
943 mmc_retune_enable(host); in mmc_execute_tuning()
949 * Change the bus mode (open drain/push-pull) of a host.
951 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) in mmc_set_bus_mode() argument
953 host->ios.bus_mode = mode; in mmc_set_bus_mode()
954 mmc_set_ios(host); in mmc_set_bus_mode()
958 * Change data bus width of a host.
960 void mmc_set_bus_width(struct mmc_host *host, unsigned int width) in mmc_set_bus_width() argument
962 host->ios.bus_width = width; in mmc_set_bus_width()
963 mmc_set_ios(host); in mmc_set_bus_width()
969 void mmc_set_initial_state(struct mmc_host *host) in mmc_set_initial_state() argument
971 if (host->cqe_on) in mmc_set_initial_state()
972 host->cqe_ops->cqe_off(host); in mmc_set_initial_state()
974 mmc_retune_disable(host); in mmc_set_initial_state()
976 if (mmc_host_is_spi(host)) in mmc_set_initial_state()
977 host->ios.chip_select = MMC_CS_HIGH; in mmc_set_initial_state()
979 host->ios.chip_select = MMC_CS_DONTCARE; in mmc_set_initial_state()
980 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; in mmc_set_initial_state()
981 host->ios.bus_width = MMC_BUS_WIDTH_1; in mmc_set_initial_state()
982 host->ios.timing = MMC_TIMING_LEGACY; in mmc_set_initial_state()
983 host->ios.drv_type = 0; in mmc_set_initial_state()
984 host->ios.enhanced_strobe = false; in mmc_set_initial_state()
990 if ((host->caps2 & MMC_CAP2_HS400_ES) && in mmc_set_initial_state()
991 host->ops->hs400_enhanced_strobe) in mmc_set_initial_state()
992 host->ops->hs400_enhanced_strobe(host, &host->ios); in mmc_set_initial_state()
994 mmc_set_ios(host); in mmc_set_initial_state()
1082 struct device_node *mmc_of_find_child_device(struct mmc_host *host, in mmc_of_find_child_device() argument
1087 if (!host->parent || !host->parent->of_node) in mmc_of_find_child_device()
1090 for_each_child_of_node(host->parent->of_node, node) { in mmc_of_find_child_device()
1102 u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) in mmc_select_voltage() argument
1111 dev_warn(mmc_dev(host), in mmc_select_voltage()
1116 ocr &= host->ocr_avail; in mmc_select_voltage()
1118 dev_warn(mmc_dev(host), "no support for card's volts\n"); in mmc_select_voltage()
1122 if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { in mmc_select_voltage()
1125 mmc_power_cycle(host, ocr); in mmc_select_voltage()
1129 if (bit != host->ios.vdd) in mmc_select_voltage()
1130 dev_warn(mmc_dev(host), "exceeding card's volts\n"); in mmc_select_voltage()
1136 int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) in mmc_set_signal_voltage() argument
1139 int old_signal_voltage = host->ios.signal_voltage; in mmc_set_signal_voltage()
1141 host->ios.signal_voltage = signal_voltage; in mmc_set_signal_voltage()
1142 if (host->ops->start_signal_voltage_switch) in mmc_set_signal_voltage()
1143 err = host->ops->start_signal_voltage_switch(host, &host->ios); in mmc_set_signal_voltage()
1146 host->ios.signal_voltage = old_signal_voltage; in mmc_set_signal_voltage()
1152 void mmc_set_initial_signal_voltage(struct mmc_host *host) in mmc_set_initial_signal_voltage() argument
1155 if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330)) in mmc_set_initial_signal_voltage()
1156 dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); in mmc_set_initial_signal_voltage()
1157 else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) in mmc_set_initial_signal_voltage()
1158 dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); in mmc_set_initial_signal_voltage()
1159 else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120)) in mmc_set_initial_signal_voltage()
1160 dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); in mmc_set_initial_signal_voltage()
1163 int mmc_host_set_uhs_voltage(struct mmc_host *host) in mmc_host_set_uhs_voltage() argument
1171 clock = host->ios.clock; in mmc_host_set_uhs_voltage()
1172 host->ios.clock = 0; in mmc_host_set_uhs_voltage()
1173 mmc_set_ios(host); in mmc_host_set_uhs_voltage()
1175 if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) in mmc_host_set_uhs_voltage()
1180 host->ios.clock = clock; in mmc_host_set_uhs_voltage()
1181 mmc_set_ios(host); in mmc_host_set_uhs_voltage()
1186 int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr) in mmc_set_uhs_voltage() argument
1195 if (!host->ops->start_signal_voltage_switch) in mmc_set_uhs_voltage()
1197 if (!host->ops->card_busy) in mmc_set_uhs_voltage()
1199 mmc_hostname(host)); in mmc_set_uhs_voltage()
1205 err = mmc_wait_for_cmd(host, &cmd, 0); in mmc_set_uhs_voltage()
1209 if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) in mmc_set_uhs_voltage()
1217 if (host->ops->card_busy && !host->ops->card_busy(host)) { in mmc_set_uhs_voltage()
1222 if (mmc_host_set_uhs_voltage(host)) { in mmc_set_uhs_voltage()
1238 if (host->ops->card_busy && host->ops->card_busy(host)) in mmc_set_uhs_voltage()
1244 "power cycling card\n", mmc_hostname(host)); in mmc_set_uhs_voltage()
1245 mmc_power_cycle(host, ocr); in mmc_set_uhs_voltage()
1252 * Select timing parameters for host.
1254 void mmc_set_timing(struct mmc_host *host, unsigned int timing) in mmc_set_timing() argument
1256 host->ios.timing = timing; in mmc_set_timing()
1257 mmc_set_ios(host); in mmc_set_timing()
1261 * Select appropriate driver type for host.
1263 void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) in mmc_set_driver_type() argument
1265 host->ios.drv_type = drv_type; in mmc_set_driver_type()
1266 mmc_set_ios(host); in mmc_set_driver_type()
1272 struct mmc_host *host = card->host; in mmc_select_drive_strength() local
1277 if (!host->ops->select_drive_strength) in mmc_select_drive_strength()
1281 if (host->caps & MMC_CAP_DRIVER_TYPE_A) in mmc_select_drive_strength()
1284 if (host->caps & MMC_CAP_DRIVER_TYPE_C) in mmc_select_drive_strength()
1287 if (host->caps & MMC_CAP_DRIVER_TYPE_D) in mmc_select_drive_strength()
1296 return host->ops->select_drive_strength(card, max_dtr, in mmc_select_drive_strength()
1310 * If a host does all the power sequencing itself, ignore the
1313 void mmc_power_up(struct mmc_host *host, u32 ocr) in mmc_power_up() argument
1315 if (host->ios.power_mode == MMC_POWER_ON) in mmc_power_up()
1318 mmc_pwrseq_pre_power_on(host); in mmc_power_up()
1320 host->ios.vdd = fls(ocr) - 1; in mmc_power_up()
1321 host->ios.power_mode = MMC_POWER_UP; in mmc_power_up()
1323 mmc_set_initial_state(host); in mmc_power_up()
1325 mmc_set_initial_signal_voltage(host); in mmc_power_up()
1331 mmc_delay(host->ios.power_delay_ms); in mmc_power_up()
1333 mmc_pwrseq_post_power_on(host); in mmc_power_up()
1335 host->ios.clock = host->f_init; in mmc_power_up()
1337 host->ios.power_mode = MMC_POWER_ON; in mmc_power_up()
1338 mmc_set_ios(host); in mmc_power_up()
1344 mmc_delay(host->ios.power_delay_ms); in mmc_power_up()
1347 void mmc_power_off(struct mmc_host *host) in mmc_power_off() argument
1349 if (host->ios.power_mode == MMC_POWER_OFF) in mmc_power_off()
1352 mmc_pwrseq_power_off(host); in mmc_power_off()
1354 host->ios.clock = 0; in mmc_power_off()
1355 host->ios.vdd = 0; in mmc_power_off()
1357 host->ios.power_mode = MMC_POWER_OFF; in mmc_power_off()
1359 mmc_set_initial_state(host); in mmc_power_off()
1369 void mmc_power_cycle(struct mmc_host *host, u32 ocr) in mmc_power_cycle() argument
1371 mmc_power_off(host); in mmc_power_cycle()
1374 mmc_power_up(host, ocr); in mmc_power_cycle()
1380 static void __mmc_release_bus(struct mmc_host *host) in __mmc_release_bus() argument
1382 WARN_ON(!host->bus_dead); in __mmc_release_bus()
1384 host->bus_ops = NULL; in __mmc_release_bus()
1390 static inline void mmc_bus_get(struct mmc_host *host) in mmc_bus_get() argument
1394 spin_lock_irqsave(&host->lock, flags); in mmc_bus_get()
1395 host->bus_refs++; in mmc_bus_get()
1396 spin_unlock_irqrestore(&host->lock, flags); in mmc_bus_get()
1403 static inline void mmc_bus_put(struct mmc_host *host) in mmc_bus_put() argument
1407 spin_lock_irqsave(&host->lock, flags); in mmc_bus_put()
1408 host->bus_refs--; in mmc_bus_put()
1409 if ((host->bus_refs == 0) && host->bus_ops) in mmc_bus_put()
1410 __mmc_release_bus(host); in mmc_bus_put()
1411 spin_unlock_irqrestore(&host->lock, flags); in mmc_bus_put()
1415 * Assign a mmc bus handler to a host. Only one bus handler may control a
1416 * host at any given time.
1418 void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) in mmc_attach_bus() argument
1422 WARN_ON(!host->claimed); in mmc_attach_bus()
1424 spin_lock_irqsave(&host->lock, flags); in mmc_attach_bus()
1426 WARN_ON(host->bus_ops); in mmc_attach_bus()
1427 WARN_ON(host->bus_refs); in mmc_attach_bus()
1429 host->bus_ops = ops; in mmc_attach_bus()
1430 host->bus_refs = 1; in mmc_attach_bus()
1431 host->bus_dead = 0; in mmc_attach_bus()
1433 spin_unlock_irqrestore(&host->lock, flags); in mmc_attach_bus()
1437 * Remove the current bus handler from a host.
1439 void mmc_detach_bus(struct mmc_host *host) in mmc_detach_bus() argument
1443 WARN_ON(!host->claimed); in mmc_detach_bus()
1444 WARN_ON(!host->bus_ops); in mmc_detach_bus()
1446 spin_lock_irqsave(&host->lock, flags); in mmc_detach_bus()
1448 host->bus_dead = 1; in mmc_detach_bus()
1450 spin_unlock_irqrestore(&host->lock, flags); in mmc_detach_bus()
1452 mmc_bus_put(host); in mmc_detach_bus()
1455 void _mmc_detect_change(struct mmc_host *host, unsigned long delay, bool cd_irq) in _mmc_detect_change() argument
1462 if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL)) in _mmc_detect_change()
1463 __pm_wakeup_event(host->ws, 5000); in _mmc_detect_change()
1465 host->detect_change = 1; in _mmc_detect_change()
1466 mmc_schedule_delayed_work(&host->detect, delay); in _mmc_detect_change()
1471 * @host: host which changed state.
1479 void mmc_detect_change(struct mmc_host *host, unsigned long delay) in mmc_detect_change() argument
1481 _mmc_detect_change(host, delay, true); in mmc_detect_change()
1565 (card->host->ios.clock / 1000); in mmc_mmc_erase_timeout()
1591 if (mmc_host_is_spi(card->host) && erase_timeout < 1000) in mmc_mmc_erase_timeout()
1646 mmc_retune_hold(card->host); in mmc_do_erase()
1684 err = mmc_wait_for_cmd(card->host, &cmd, 0); in mmc_do_erase()
1699 err = mmc_wait_for_cmd(card->host, &cmd, 0); in mmc_do_erase()
1712 * If the host controller supports busy signalling and the timeout for in mmc_do_erase()
1714 * use R1B response. Or we need to prevent the host from doing hw busy in mmc_do_erase()
1719 if (!(card->host->caps & MMC_CAP_NEED_RSP_BUSY) && in mmc_do_erase()
1720 card->host->max_busy_timeout && in mmc_do_erase()
1721 busy_timeout > card->host->max_busy_timeout) { in mmc_do_erase()
1729 err = mmc_wait_for_cmd(card->host, &cmd, 0); in mmc_do_erase()
1737 if (mmc_host_is_spi(card->host)) in mmc_do_erase()
1744 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) in mmc_do_erase()
1751 mmc_retune_release(card->host); in mmc_do_erase()
1810 * Caller must claim host before calling this function.
1933 struct mmc_host *host = card->host; in mmc_do_calc_max_discard() local
1936 unsigned int max_busy_timeout = host->max_busy_timeout ? in mmc_do_calc_max_discard()
1937 host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS; in mmc_do_calc_max_discard()
1951 * We should not only use 'host->max_busy_timeout' as the limitation in mmc_do_calc_max_discard()
1957 * matter what size of 'host->max_busy_timeout', but if the in mmc_do_calc_max_discard()
1958 * 'host->max_busy_timeout' is large enough for more discard sectors, in mmc_do_calc_max_discard()
1960 * get a balance value. In cases when the 'host->max_busy_timeout' in mmc_do_calc_max_discard()
2010 struct mmc_host *host = card->host; in mmc_calc_max_discard() local
2030 mmc_hostname(host), max_discard, host->max_busy_timeout ? in mmc_calc_max_discard()
2031 host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS); in mmc_calc_max_discard()
2053 return mmc_wait_for_cmd(card->host, &cmd, 5); in mmc_set_blocklen()
2057 static void mmc_hw_reset_for_init(struct mmc_host *host) in mmc_hw_reset_for_init() argument
2059 mmc_pwrseq_reset(host); in mmc_hw_reset_for_init()
2061 if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) in mmc_hw_reset_for_init()
2063 host->ops->hw_reset(host); in mmc_hw_reset_for_init()
2068 * @host: MMC host to which the card is attached
2071 * block layer or card drivers. You cannot use it in host drivers (struct
2076 int mmc_hw_reset(struct mmc_host *host) in mmc_hw_reset() argument
2080 if (!host->card) in mmc_hw_reset()
2083 mmc_bus_get(host); in mmc_hw_reset()
2084 if (!host->bus_ops || host->bus_dead || !host->bus_ops->hw_reset) { in mmc_hw_reset()
2085 mmc_bus_put(host); in mmc_hw_reset()
2089 ret = host->bus_ops->hw_reset(host); in mmc_hw_reset()
2090 mmc_bus_put(host); in mmc_hw_reset()
2094 mmc_hostname(host), ret); in mmc_hw_reset()
2100 int mmc_sw_reset(struct mmc_host *host) in mmc_sw_reset() argument
2104 if (!host->card) in mmc_sw_reset()
2107 mmc_bus_get(host); in mmc_sw_reset()
2108 if (!host->bus_ops || host->bus_dead || !host->bus_ops->sw_reset) { in mmc_sw_reset()
2109 mmc_bus_put(host); in mmc_sw_reset()
2113 ret = host->bus_ops->sw_reset(host); in mmc_sw_reset()
2114 mmc_bus_put(host); in mmc_sw_reset()
2118 mmc_hostname(host), ret); in mmc_sw_reset()
2124 static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) in mmc_rescan_try_freq() argument
2126 host->f_init = freq; in mmc_rescan_try_freq()
2129 mmc_hostname(host), __func__, host->f_init); in mmc_rescan_try_freq()
2131 mmc_power_up(host, host->ocr_avail); in mmc_rescan_try_freq()
2137 mmc_hw_reset_for_init(host); in mmc_rescan_try_freq()
2145 if (!(host->caps2 & MMC_CAP2_NO_SDIO)) in mmc_rescan_try_freq()
2146 sdio_reset(host); in mmc_rescan_try_freq()
2148 mmc_go_idle(host); in mmc_rescan_try_freq()
2150 if (!(host->caps2 & MMC_CAP2_NO_SD)) in mmc_rescan_try_freq()
2151 mmc_send_if_cond(host, host->ocr_avail); in mmc_rescan_try_freq()
2154 if (!(host->caps2 & MMC_CAP2_NO_SDIO)) in mmc_rescan_try_freq()
2155 if (!mmc_attach_sdio(host)) in mmc_rescan_try_freq()
2158 if (!(host->caps2 & MMC_CAP2_NO_SD)) in mmc_rescan_try_freq()
2159 if (!mmc_attach_sd(host)) in mmc_rescan_try_freq()
2162 if (!(host->caps2 & MMC_CAP2_NO_MMC)) in mmc_rescan_try_freq()
2163 if (!mmc_attach_mmc(host)) in mmc_rescan_try_freq()
2166 mmc_power_off(host); in mmc_rescan_try_freq()
2170 int _mmc_detect_card_removed(struct mmc_host *host) in _mmc_detect_card_removed() argument
2174 if (!host->card || mmc_card_removed(host->card)) in _mmc_detect_card_removed()
2177 ret = host->bus_ops->alive(host); in _mmc_detect_card_removed()
2186 if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { in _mmc_detect_card_removed()
2187 mmc_detect_change(host, msecs_to_jiffies(200)); in _mmc_detect_card_removed()
2188 pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); in _mmc_detect_card_removed()
2192 mmc_card_set_removed(host->card); in _mmc_detect_card_removed()
2193 pr_debug("%s: card remove detected\n", mmc_hostname(host)); in _mmc_detect_card_removed()
2199 int mmc_detect_card_removed(struct mmc_host *host) in mmc_detect_card_removed() argument
2201 struct mmc_card *card = host->card; in mmc_detect_card_removed()
2204 WARN_ON(!host->claimed); in mmc_detect_card_removed()
2209 if (!mmc_card_is_removable(host)) in mmc_detect_card_removed()
2215 * detect a change or host requires polling to provide card detection. in mmc_detect_card_removed()
2217 if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) in mmc_detect_card_removed()
2220 host->detect_change = 0; in mmc_detect_card_removed()
2222 ret = _mmc_detect_card_removed(host); in mmc_detect_card_removed()
2223 if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { in mmc_detect_card_removed()
2228 cancel_delayed_work(&host->detect); in mmc_detect_card_removed()
2229 _mmc_detect_change(host, 0, false); in mmc_detect_card_removed()
2239 struct mmc_host *host = in mmc_rescan() local
2243 if (host->rescan_disable) in mmc_rescan()
2247 if (!mmc_card_is_removable(host) && host->rescan_entered) in mmc_rescan()
2249 host->rescan_entered = 1; in mmc_rescan()
2251 if (host->trigger_card_event && host->ops->card_event) { in mmc_rescan()
2252 mmc_claim_host(host); in mmc_rescan()
2253 host->ops->card_event(host); in mmc_rescan()
2254 mmc_release_host(host); in mmc_rescan()
2255 host->trigger_card_event = false; in mmc_rescan()
2258 mmc_bus_get(host); in mmc_rescan()
2261 if (host->bus_ops && !host->bus_dead) in mmc_rescan()
2262 host->bus_ops->detect(host); in mmc_rescan()
2264 host->detect_change = 0; in mmc_rescan()
2270 mmc_bus_put(host); in mmc_rescan()
2271 mmc_bus_get(host); in mmc_rescan()
2274 if (host->bus_ops != NULL) { in mmc_rescan()
2275 mmc_bus_put(host); in mmc_rescan()
2283 mmc_bus_put(host); in mmc_rescan()
2285 mmc_claim_host(host); in mmc_rescan()
2286 if (mmc_card_is_removable(host) && host->ops->get_cd && in mmc_rescan()
2287 host->ops->get_cd(host) == 0) { in mmc_rescan()
2288 mmc_power_off(host); in mmc_rescan()
2289 mmc_release_host(host); in mmc_rescan()
2295 if (freq > host->f_max) { in mmc_rescan()
2298 freq = host->f_max; in mmc_rescan()
2300 if (!mmc_rescan_try_freq(host, max(freq, host->f_min))) in mmc_rescan()
2302 if (freqs[i] <= host->f_min) in mmc_rescan()
2305 mmc_release_host(host); in mmc_rescan()
2308 if (host->caps & MMC_CAP_NEEDS_POLL) in mmc_rescan()
2309 mmc_schedule_delayed_work(&host->detect, HZ); in mmc_rescan()
2312 void mmc_start_host(struct mmc_host *host) in mmc_start_host() argument
2314 host->f_init = max(min(freqs[0], host->f_max), host->f_min); in mmc_start_host()
2315 host->rescan_disable = 0; in mmc_start_host()
2317 if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) { in mmc_start_host()
2318 mmc_claim_host(host); in mmc_start_host()
2319 mmc_power_up(host, host->ocr_avail); in mmc_start_host()
2320 mmc_release_host(host); in mmc_start_host()
2323 mmc_gpiod_request_cd_irq(host); in mmc_start_host()
2324 _mmc_detect_change(host, 0, false); in mmc_start_host()
2327 void mmc_stop_host(struct mmc_host *host) in mmc_stop_host() argument
2329 if (host->slot.cd_irq >= 0) { in mmc_stop_host()
2330 mmc_gpio_set_cd_wake(host, false); in mmc_stop_host()
2331 disable_irq(host->slot.cd_irq); in mmc_stop_host()
2334 host->rescan_disable = 1; in mmc_stop_host()
2335 cancel_delayed_work_sync(&host->detect); in mmc_stop_host()
2338 host->pm_flags = 0; in mmc_stop_host()
2340 mmc_bus_get(host); in mmc_stop_host()
2341 if (host->bus_ops && !host->bus_dead) { in mmc_stop_host()
2342 /* Calling bus_ops->remove() with a claimed host can deadlock */ in mmc_stop_host()
2343 host->bus_ops->remove(host); in mmc_stop_host()
2344 mmc_claim_host(host); in mmc_stop_host()
2345 mmc_detach_bus(host); in mmc_stop_host()
2346 mmc_power_off(host); in mmc_stop_host()
2347 mmc_release_host(host); in mmc_stop_host()
2348 mmc_bus_put(host); in mmc_stop_host()
2351 mmc_bus_put(host); in mmc_stop_host()
2353 mmc_claim_host(host); in mmc_stop_host()
2354 mmc_power_off(host); in mmc_stop_host()
2355 mmc_release_host(host); in mmc_stop_host()
2366 struct mmc_host *host = container_of( in mmc_pm_notify() local
2375 spin_lock_irqsave(&host->lock, flags); in mmc_pm_notify()
2376 host->rescan_disable = 1; in mmc_pm_notify()
2377 spin_unlock_irqrestore(&host->lock, flags); in mmc_pm_notify()
2378 cancel_delayed_work_sync(&host->detect); in mmc_pm_notify()
2380 if (!host->bus_ops) in mmc_pm_notify()
2384 if (host->bus_ops->pre_suspend) in mmc_pm_notify()
2385 err = host->bus_ops->pre_suspend(host); in mmc_pm_notify()
2389 if (!mmc_card_is_removable(host)) { in mmc_pm_notify()
2390 dev_warn(mmc_dev(host), in mmc_pm_notify()
2391 "pre_suspend failed for non-removable host: " in mmc_pm_notify()
2397 /* Calling bus_ops->remove() with a claimed host can deadlock */ in mmc_pm_notify()
2398 host->bus_ops->remove(host); in mmc_pm_notify()
2399 mmc_claim_host(host); in mmc_pm_notify()
2400 mmc_detach_bus(host); in mmc_pm_notify()
2401 mmc_power_off(host); in mmc_pm_notify()
2402 mmc_release_host(host); in mmc_pm_notify()
2403 host->pm_flags = 0; in mmc_pm_notify()
2410 spin_lock_irqsave(&host->lock, flags); in mmc_pm_notify()
2411 host->rescan_disable = 0; in mmc_pm_notify()
2412 spin_unlock_irqrestore(&host->lock, flags); in mmc_pm_notify()
2413 _mmc_detect_change(host, 0, false); in mmc_pm_notify()
2420 void mmc_register_pm_notifier(struct mmc_host *host) in mmc_register_pm_notifier() argument
2422 host->pm_notify.notifier_call = mmc_pm_notify; in mmc_register_pm_notifier()
2423 register_pm_notifier(&host->pm_notify); in mmc_register_pm_notifier()
2426 void mmc_unregister_pm_notifier(struct mmc_host *host) in mmc_unregister_pm_notifier() argument
2428 unregister_pm_notifier(&host->pm_notify); in mmc_unregister_pm_notifier()