Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Pierre Ossman | aaac1b4 | 2007-02-28 15:33:10 +0100 | [diff] [blame] | 2 | * linux/drivers/mmc/core/core.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2003-2004 Russell King, All Rights Reserved. |
Pierre Ossman | 5b4fd9a | 2005-09-06 15:18:56 -0700 | [diff] [blame] | 5 | * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. |
Pierre Ossman | ad3868b | 2008-06-28 12:52:45 +0200 | [diff] [blame] | 6 | * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. |
Philip Langdale | bce40a3 | 2006-10-21 12:35:02 +0200 | [diff] [blame] | 7 | * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/completion.h> |
| 17 | #include <linux/device.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/pagemap.h> |
| 20 | #include <linux/err.h> |
Pierre Ossman | af8350c | 2007-09-24 07:15:48 +0200 | [diff] [blame] | 21 | #include <linux/leds.h> |
Pierre Ossman | b57c43a | 2005-09-06 15:18:53 -0700 | [diff] [blame] | 22 | #include <linux/scatterlist.h> |
Anton Vorontsov | 86e8286 | 2008-11-26 22:54:17 +0300 | [diff] [blame] | 23 | #include <linux/log2.h> |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 24 | #include <linux/regulator/consumer.h> |
Ohad Ben-Cohen | e594573 | 2010-11-28 07:21:30 +0200 | [diff] [blame] | 25 | #include <linux/pm_runtime.h> |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 26 | #include <linux/pm_wakeup.h> |
Amerigo Wang | 35eb6db | 2011-07-25 17:13:11 -0700 | [diff] [blame] | 27 | #include <linux/suspend.h> |
Per Forlin | 1b676f7 | 2011-08-19 14:52:37 +0200 | [diff] [blame] | 28 | #include <linux/fault-inject.h> |
| 29 | #include <linux/random.h> |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 30 | #include <linux/slab.h> |
Haijun Zhang | 6e9e318 | 2013-08-26 09:19:22 +0800 | [diff] [blame] | 31 | #include <linux/of.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | #include <linux/mmc/card.h> |
| 34 | #include <linux/mmc/host.h> |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 35 | #include <linux/mmc/mmc.h> |
| 36 | #include <linux/mmc/sd.h> |
Adrian Hunter | 740a221 | 2014-03-10 15:02:41 +0200 | [diff] [blame] | 37 | #include <linux/mmc/slot-gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Baolin Wang | 7962fc3 | 2016-03-31 11:16:27 +0800 | [diff] [blame] | 39 | #define CREATE_TRACE_POINTS |
| 40 | #include <trace/events/mmc.h> |
| 41 | |
Pierre Ossman | aaac1b4 | 2007-02-28 15:33:10 +0100 | [diff] [blame] | 42 | #include "core.h" |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 43 | #include "bus.h" |
| 44 | #include "host.h" |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 45 | #include "sdio_bus.h" |
Ulf Hansson | 3aa8793 | 2014-11-28 14:38:36 +0100 | [diff] [blame] | 46 | #include "pwrseq.h" |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 47 | |
| 48 | #include "mmc_ops.h" |
| 49 | #include "sd_ops.h" |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 50 | #include "sdio_ops.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 52 | /* If the device is not responding */ |
| 53 | #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ |
| 54 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 55 | /* |
| 56 | * Background operations can take a long time, depending on the housekeeping |
| 57 | * operations the card has to perform. |
| 58 | */ |
| 59 | #define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ |
| 60 | |
Ulf Hansson | 12182af | 2016-07-27 00:04:03 +0200 | [diff] [blame] | 61 | /* The max erase timeout, used when host->max_busy_timeout isn't specified */ |
| 62 | #define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */ |
| 63 | |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 64 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 65 | |
| 66 | /* |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 67 | * Enabling software CRCs on the data blocks can be a significant (30%) |
| 68 | * performance cost, and for other reasons may not always be desired. |
| 69 | * So we allow it it to be disabled. |
| 70 | */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 71 | bool use_spi_crc = 1; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 72 | module_param(use_spi_crc, bool, 0); |
| 73 | |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 74 | static int mmc_schedule_delayed_work(struct delayed_work *work, |
| 75 | unsigned long delay) |
| 76 | { |
Ulf Hansson | 520bd7a | 2015-12-01 10:35:29 +0100 | [diff] [blame] | 77 | /* |
| 78 | * We use the system_freezable_wq, because of two reasons. |
| 79 | * First, it allows several works (not the same work item) to be |
| 80 | * executed simultaneously. Second, the queue becomes frozen when |
| 81 | * userspace becomes frozen during system PM. |
| 82 | */ |
| 83 | return queue_delayed_work(system_freezable_wq, work, delay); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 84 | } |
| 85 | |
Per Forlin | 1b676f7 | 2011-08-19 14:52:37 +0200 | [diff] [blame] | 86 | #ifdef CONFIG_FAIL_MMC_REQUEST |
| 87 | |
| 88 | /* |
| 89 | * Internal function. Inject random data errors. |
| 90 | * If mmc_data is NULL no errors are injected. |
| 91 | */ |
| 92 | static void mmc_should_fail_request(struct mmc_host *host, |
| 93 | struct mmc_request *mrq) |
| 94 | { |
| 95 | struct mmc_command *cmd = mrq->cmd; |
| 96 | struct mmc_data *data = mrq->data; |
| 97 | static const int data_errors[] = { |
| 98 | -ETIMEDOUT, |
| 99 | -EILSEQ, |
| 100 | -EIO, |
| 101 | }; |
| 102 | |
| 103 | if (!data) |
| 104 | return; |
| 105 | |
| 106 | if (cmd->error || data->error || |
| 107 | !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) |
| 108 | return; |
| 109 | |
Akinobu Mita | 2e744fc | 2013-04-29 16:21:31 -0700 | [diff] [blame] | 110 | data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; |
| 111 | data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; |
Per Forlin | 1b676f7 | 2011-08-19 14:52:37 +0200 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | #else /* CONFIG_FAIL_MMC_REQUEST */ |
| 115 | |
| 116 | static inline void mmc_should_fail_request(struct mmc_host *host, |
| 117 | struct mmc_request *mrq) |
| 118 | { |
| 119 | } |
| 120 | |
| 121 | #endif /* CONFIG_FAIL_MMC_REQUEST */ |
| 122 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 123 | static inline void mmc_complete_cmd(struct mmc_request *mrq) |
| 124 | { |
| 125 | if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion)) |
| 126 | complete_all(&mrq->cmd_completion); |
| 127 | } |
| 128 | |
| 129 | void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq) |
| 130 | { |
| 131 | if (!mrq->cap_cmd_during_tfr) |
| 132 | return; |
| 133 | |
| 134 | mmc_complete_cmd(mrq); |
| 135 | |
| 136 | pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n", |
| 137 | mmc_hostname(host), mrq->cmd->opcode); |
| 138 | } |
| 139 | EXPORT_SYMBOL(mmc_command_done); |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | /** |
Russell King | fe10c6a | 2006-05-04 13:51:45 +0100 | [diff] [blame] | 142 | * mmc_request_done - finish processing an MMC request |
| 143 | * @host: MMC host which completed request |
| 144 | * @mrq: MMC request which request |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | * |
| 146 | * MMC drivers should call this function when they have completed |
Russell King | fe10c6a | 2006-05-04 13:51:45 +0100 | [diff] [blame] | 147 | * their processing of a request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | */ |
| 149 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) |
| 150 | { |
| 151 | struct mmc_command *cmd = mrq->cmd; |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 152 | int err = cmd->error; |
| 153 | |
Adrian Hunter | bd11e8b | 2015-05-07 13:10:22 +0300 | [diff] [blame] | 154 | /* Flag re-tuning needed on CRC errors */ |
Chaotian Jing | 031277d | 2015-09-30 17:37:18 +0800 | [diff] [blame] | 155 | if ((cmd->opcode != MMC_SEND_TUNING_BLOCK && |
| 156 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) && |
| 157 | (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || |
Adrian Hunter | bd11e8b | 2015-05-07 13:10:22 +0300 | [diff] [blame] | 158 | (mrq->data && mrq->data->error == -EILSEQ) || |
Chaotian Jing | 031277d | 2015-09-30 17:37:18 +0800 | [diff] [blame] | 159 | (mrq->stop && mrq->stop->error == -EILSEQ))) |
Adrian Hunter | bd11e8b | 2015-05-07 13:10:22 +0300 | [diff] [blame] | 160 | mmc_retune_needed(host); |
| 161 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 162 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
| 163 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) |
| 164 | cmd->retries = 0; |
| 165 | } |
| 166 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 167 | if (host->ongoing_mrq == mrq) |
| 168 | host->ongoing_mrq = NULL; |
| 169 | |
| 170 | mmc_complete_cmd(mrq); |
| 171 | |
Baolin Wang | 7962fc3 | 2016-03-31 11:16:27 +0800 | [diff] [blame] | 172 | trace_mmc_request_done(host, mrq); |
| 173 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 174 | if (err && cmd->retries && !mmc_card_removed(host->card)) { |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 175 | /* |
| 176 | * Request starter must handle retries - see |
| 177 | * mmc_wait_for_req_done(). |
| 178 | */ |
| 179 | if (mrq->done) |
| 180 | mrq->done(mrq); |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 181 | } else { |
Per Forlin | 1b676f7 | 2011-08-19 14:52:37 +0200 | [diff] [blame] | 182 | mmc_should_fail_request(host, mrq); |
| 183 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 184 | if (!host->ongoing_mrq) |
| 185 | led_trigger_event(host->led, LED_OFF); |
Pierre Ossman | af8350c | 2007-09-24 07:15:48 +0200 | [diff] [blame] | 186 | |
Andrew Gabbasov | fc75b70 | 2014-10-01 07:14:10 -0500 | [diff] [blame] | 187 | if (mrq->sbc) { |
| 188 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", |
| 189 | mmc_hostname(host), mrq->sbc->opcode, |
| 190 | mrq->sbc->error, |
| 191 | mrq->sbc->resp[0], mrq->sbc->resp[1], |
| 192 | mrq->sbc->resp[2], mrq->sbc->resp[3]); |
| 193 | } |
| 194 | |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 195 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
| 196 | mmc_hostname(host), cmd->opcode, err, |
| 197 | cmd->resp[0], cmd->resp[1], |
| 198 | cmd->resp[2], cmd->resp[3]); |
| 199 | |
| 200 | if (mrq->data) { |
| 201 | pr_debug("%s: %d bytes transferred: %d\n", |
| 202 | mmc_hostname(host), |
| 203 | mrq->data->bytes_xfered, mrq->data->error); |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 204 | #ifdef CONFIG_BLOCK |
| 205 | if (mrq->lat_hist_enabled) { |
| 206 | ktime_t completion; |
| 207 | u_int64_t delta_us; |
| 208 | |
| 209 | completion = ktime_get(); |
| 210 | delta_us = ktime_us_delta(completion, |
| 211 | mrq->io_start); |
Hyojun Kim | 11537d5 | 2017-12-21 09:57:41 -0800 | [diff] [blame] | 212 | blk_update_latency_hist( |
| 213 | (mrq->data->flags & MMC_DATA_READ) ? |
| 214 | &host->io_lat_read : |
| 215 | &host->io_lat_write, delta_us); |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 216 | } |
| 217 | #endif |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | if (mrq->stop) { |
| 221 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", |
| 222 | mmc_hostname(host), mrq->stop->opcode, |
| 223 | mrq->stop->error, |
| 224 | mrq->stop->resp[0], mrq->stop->resp[1], |
| 225 | mrq->stop->resp[2], mrq->stop->resp[3]); |
| 226 | } |
| 227 | |
| 228 | if (mrq->done) |
| 229 | mrq->done(mrq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
| 231 | } |
| 232 | |
| 233 | EXPORT_SYMBOL(mmc_request_done); |
| 234 | |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 235 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
| 236 | { |
| 237 | int err; |
| 238 | |
| 239 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ |
| 240 | err = mmc_retune(host); |
| 241 | if (err) { |
| 242 | mrq->cmd->error = err; |
| 243 | mmc_request_done(host, mrq); |
| 244 | return; |
| 245 | } |
| 246 | |
Hans de Goede | 5d3f6ef | 2015-09-22 17:30:25 +0200 | [diff] [blame] | 247 | /* |
| 248 | * For sdio rw commands we must wait for card busy otherwise some |
| 249 | * sdio devices won't work properly. |
| 250 | */ |
| 251 | if (mmc_is_io_op(mrq->cmd->opcode) && host->ops->card_busy) { |
| 252 | int tries = 500; /* Wait aprox 500ms at maximum */ |
| 253 | |
| 254 | while (host->ops->card_busy(host) && --tries) |
| 255 | mmc_delay(1); |
| 256 | |
| 257 | if (tries == 0) { |
| 258 | mrq->cmd->error = -EBUSY; |
| 259 | mmc_request_done(host, mrq); |
| 260 | return; |
| 261 | } |
| 262 | } |
| 263 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 264 | if (mrq->cap_cmd_during_tfr) { |
| 265 | host->ongoing_mrq = mrq; |
| 266 | /* |
| 267 | * Retry path could come through here without having waiting on |
| 268 | * cmd_completion, so ensure it is reinitialised. |
| 269 | */ |
| 270 | reinit_completion(&mrq->cmd_completion); |
| 271 | } |
| 272 | |
Baolin Wang | 7962fc3 | 2016-03-31 11:16:27 +0800 | [diff] [blame] | 273 | trace_mmc_request_start(host, mrq); |
| 274 | |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 275 | host->ops->request(host, mrq); |
| 276 | } |
| 277 | |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 278 | static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | { |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 280 | #ifdef CONFIG_MMC_DEBUG |
| 281 | unsigned int i, sz; |
Pierre Ossman | a84756c | 2008-07-29 01:09:37 +0200 | [diff] [blame] | 282 | struct scatterlist *sg; |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 283 | #endif |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 284 | mmc_retune_hold(host); |
| 285 | |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 286 | if (mmc_card_removed(host->card)) |
| 287 | return -ENOMEDIUM; |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 288 | |
Jaehoon Chung | 7b2fd4f | 2012-02-07 14:13:10 +0900 | [diff] [blame] | 289 | if (mrq->sbc) { |
| 290 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", |
| 291 | mmc_hostname(host), mrq->sbc->opcode, |
| 292 | mrq->sbc->arg, mrq->sbc->flags); |
| 293 | } |
| 294 | |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 295 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", |
| 296 | mmc_hostname(host), mrq->cmd->opcode, |
| 297 | mrq->cmd->arg, mrq->cmd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 299 | if (mrq->data) { |
| 300 | pr_debug("%s: blksz %d blocks %d flags %08x " |
| 301 | "tsac %d ms nsac %d\n", |
| 302 | mmc_hostname(host), mrq->data->blksz, |
| 303 | mrq->data->blocks, mrq->data->flags, |
Pierre Ossman | ce252ed | 2007-08-07 14:06:18 +0200 | [diff] [blame] | 304 | mrq->data->timeout_ns / 1000000, |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 305 | mrq->data->timeout_clks); |
| 306 | } |
| 307 | |
| 308 | if (mrq->stop) { |
| 309 | pr_debug("%s: CMD%u arg %08x flags %08x\n", |
| 310 | mmc_hostname(host), mrq->stop->opcode, |
| 311 | mrq->stop->arg, mrq->stop->flags); |
| 312 | } |
| 313 | |
Pierre Ossman | f22ee4e | 2006-12-26 15:11:23 +0100 | [diff] [blame] | 314 | WARN_ON(!host->claimed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | mrq->cmd->error = 0; |
| 317 | mrq->cmd->mrq = mrq; |
Andrew Gabbasov | cce411e | 2014-10-01 07:14:09 -0500 | [diff] [blame] | 318 | if (mrq->sbc) { |
| 319 | mrq->sbc->error = 0; |
| 320 | mrq->sbc->mrq = mrq; |
| 321 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | if (mrq->data) { |
Pierre Ossman | fe4a3c7 | 2006-11-21 17:54:23 +0100 | [diff] [blame] | 323 | BUG_ON(mrq->data->blksz > host->max_blk_size); |
Pierre Ossman | 55db890 | 2006-11-21 17:55:45 +0100 | [diff] [blame] | 324 | BUG_ON(mrq->data->blocks > host->max_blk_count); |
| 325 | BUG_ON(mrq->data->blocks * mrq->data->blksz > |
| 326 | host->max_req_size); |
Pierre Ossman | fe4a3c7 | 2006-11-21 17:54:23 +0100 | [diff] [blame] | 327 | |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 328 | #ifdef CONFIG_MMC_DEBUG |
| 329 | sz = 0; |
Pierre Ossman | a84756c | 2008-07-29 01:09:37 +0200 | [diff] [blame] | 330 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
| 331 | sz += sg->length; |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 332 | BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); |
| 333 | #endif |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | mrq->cmd->data = mrq->data; |
| 336 | mrq->data->error = 0; |
| 337 | mrq->data->mrq = mrq; |
| 338 | if (mrq->stop) { |
| 339 | mrq->data->stop = mrq->stop; |
| 340 | mrq->stop->error = 0; |
| 341 | mrq->stop->mrq = mrq; |
| 342 | } |
| 343 | } |
Pierre Tardy | 66c036e | 2011-02-06 19:02:48 +0100 | [diff] [blame] | 344 | led_trigger_event(host->led, LED_FULL); |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 345 | __mmc_start_request(host, mrq); |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 346 | |
| 347 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | } |
| 349 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 350 | /** |
| 351 | * mmc_start_bkops - start BKOPS for supported cards |
| 352 | * @card: MMC card to start BKOPS |
| 353 | * @form_exception: A flag to indicate if this function was |
| 354 | * called due to an exception raised by the card |
| 355 | * |
| 356 | * Start background operations whenever requested. |
| 357 | * When the urgent BKOPS bit is set in a R1 command response |
| 358 | * then background operations should be started immediately. |
| 359 | */ |
| 360 | void mmc_start_bkops(struct mmc_card *card, bool from_exception) |
| 361 | { |
| 362 | int err; |
| 363 | int timeout; |
| 364 | bool use_busy_signal; |
| 365 | |
| 366 | BUG_ON(!card); |
| 367 | |
Alexey Skidanov | 0501be6 | 2015-01-29 10:49:43 +0200 | [diff] [blame] | 368 | if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 369 | return; |
| 370 | |
| 371 | err = mmc_read_bkops_status(card); |
| 372 | if (err) { |
| 373 | pr_err("%s: Failed to read bkops status: %d\n", |
| 374 | mmc_hostname(card->host), err); |
| 375 | return; |
| 376 | } |
| 377 | |
| 378 | if (!card->ext_csd.raw_bkops_status) |
| 379 | return; |
| 380 | |
| 381 | if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && |
| 382 | from_exception) |
| 383 | return; |
| 384 | |
| 385 | mmc_claim_host(card->host); |
| 386 | if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { |
| 387 | timeout = MMC_BKOPS_MAX_TIMEOUT; |
| 388 | use_busy_signal = true; |
| 389 | } else { |
| 390 | timeout = 0; |
| 391 | use_busy_signal = false; |
| 392 | } |
| 393 | |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 394 | mmc_retune_hold(card->host); |
| 395 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 396 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 397 | EXT_CSD_BKOPS_START, 1, timeout, |
| 398 | use_busy_signal, true, false); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 399 | if (err) { |
| 400 | pr_warn("%s: Error %d starting bkops\n", |
| 401 | mmc_hostname(card->host), err); |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 402 | mmc_retune_release(card->host); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 403 | goto out; |
| 404 | } |
| 405 | |
| 406 | /* |
| 407 | * For urgent bkops status (LEVEL_2 and more) |
| 408 | * bkops executed synchronously, otherwise |
| 409 | * the operation is in progress |
| 410 | */ |
| 411 | if (!use_busy_signal) |
| 412 | mmc_card_set_doing_bkops(card); |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 413 | else |
| 414 | mmc_retune_release(card->host); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 415 | out: |
| 416 | mmc_release_host(card->host); |
| 417 | } |
| 418 | EXPORT_SYMBOL(mmc_start_bkops); |
| 419 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 420 | /* |
| 421 | * mmc_wait_data_done() - done callback for data request |
| 422 | * @mrq: done data request |
| 423 | * |
| 424 | * Wakes up mmc context, passed as a callback to host controller driver |
| 425 | */ |
| 426 | static void mmc_wait_data_done(struct mmc_request *mrq) |
| 427 | { |
Jialing Fu | 71f8a4b | 2015-08-28 11:13:09 +0800 | [diff] [blame] | 428 | struct mmc_context_info *context_info = &mrq->host->context_info; |
| 429 | |
| 430 | context_info->is_done_rcv = true; |
| 431 | wake_up_interruptible(&context_info->wait); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 432 | } |
| 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | static void mmc_wait_done(struct mmc_request *mrq) |
| 435 | { |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 436 | complete(&mrq->completion); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 439 | static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) |
| 440 | { |
| 441 | struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq); |
| 442 | |
| 443 | /* |
| 444 | * If there is an ongoing transfer, wait for the command line to become |
| 445 | * available. |
| 446 | */ |
| 447 | if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion)) |
| 448 | wait_for_completion(&ongoing_mrq->cmd_completion); |
| 449 | } |
| 450 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 451 | /* |
| 452 | *__mmc_start_data_req() - starts data request |
| 453 | * @host: MMC host to start the request |
| 454 | * @mrq: data request to start |
| 455 | * |
| 456 | * Sets the done callback to be called when request is completed by the card. |
| 457 | * Starts data mmc request execution |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 458 | * If an ongoing transfer is already in progress, wait for the command line |
| 459 | * to become available before sending another command. |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 460 | */ |
| 461 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) |
| 462 | { |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 463 | int err; |
| 464 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 465 | mmc_wait_ongoing_tfr_cmd(host); |
| 466 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 467 | mrq->done = mmc_wait_data_done; |
| 468 | mrq->host = host; |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 469 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 470 | init_completion(&mrq->cmd_completion); |
| 471 | |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 472 | err = mmc_start_request(host, mrq); |
| 473 | if (err) { |
| 474 | mrq->cmd->error = err; |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 475 | mmc_complete_cmd(mrq); |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 476 | mmc_wait_data_done(mrq); |
| 477 | } |
| 478 | |
| 479 | return err; |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 480 | } |
| 481 | |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 482 | static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 483 | { |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 484 | int err; |
| 485 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 486 | mmc_wait_ongoing_tfr_cmd(host); |
| 487 | |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 488 | init_completion(&mrq->completion); |
| 489 | mrq->done = mmc_wait_done; |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 490 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 491 | init_completion(&mrq->cmd_completion); |
| 492 | |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 493 | err = mmc_start_request(host, mrq); |
| 494 | if (err) { |
| 495 | mrq->cmd->error = err; |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 496 | mmc_complete_cmd(mrq); |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 497 | complete(&mrq->completion); |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 498 | } |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 499 | |
| 500 | return err; |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 501 | } |
| 502 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 503 | /* |
| 504 | * mmc_wait_for_data_req_done() - wait for request completed |
| 505 | * @host: MMC host to prepare the command. |
| 506 | * @mrq: MMC request to wait for |
| 507 | * |
| 508 | * Blocks MMC context till host controller will ack end of data request |
| 509 | * execution or new request notification arrives from the block layer. |
| 510 | * Handles command retries. |
| 511 | * |
| 512 | * Returns enum mmc_blk_status after checking errors. |
| 513 | */ |
| 514 | static int mmc_wait_for_data_req_done(struct mmc_host *host, |
| 515 | struct mmc_request *mrq, |
| 516 | struct mmc_async_req *next_req) |
| 517 | { |
| 518 | struct mmc_command *cmd; |
| 519 | struct mmc_context_info *context_info = &host->context_info; |
| 520 | int err; |
| 521 | unsigned long flags; |
| 522 | |
| 523 | while (1) { |
| 524 | wait_event_interruptible(context_info->wait, |
| 525 | (context_info->is_done_rcv || |
| 526 | context_info->is_new_req)); |
| 527 | spin_lock_irqsave(&context_info->lock, flags); |
| 528 | context_info->is_waiting_last_req = false; |
| 529 | spin_unlock_irqrestore(&context_info->lock, flags); |
| 530 | if (context_info->is_done_rcv) { |
| 531 | context_info->is_done_rcv = false; |
| 532 | context_info->is_new_req = false; |
| 533 | cmd = mrq->cmd; |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 534 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 535 | if (!cmd->error || !cmd->retries || |
| 536 | mmc_card_removed(host->card)) { |
| 537 | err = host->areq->err_check(host->card, |
| 538 | host->areq); |
| 539 | break; /* return err */ |
| 540 | } else { |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 541 | mmc_retune_recheck(host); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 542 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", |
| 543 | mmc_hostname(host), |
| 544 | cmd->opcode, cmd->error); |
| 545 | cmd->retries--; |
| 546 | cmd->error = 0; |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 547 | __mmc_start_request(host, mrq); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 548 | continue; /* wait for done/new event again */ |
| 549 | } |
| 550 | } else if (context_info->is_new_req) { |
| 551 | context_info->is_new_req = false; |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 552 | if (!next_req) |
| 553 | return MMC_BLK_NEW_REQUEST; |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 554 | } |
| 555 | } |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 556 | mmc_retune_release(host); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 557 | return err; |
| 558 | } |
| 559 | |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 560 | void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 561 | { |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 562 | struct mmc_command *cmd; |
| 563 | |
| 564 | while (1) { |
| 565 | wait_for_completion(&mrq->completion); |
| 566 | |
| 567 | cmd = mrq->cmd; |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 568 | |
| 569 | /* |
| 570 | * If host has timed out waiting for the sanitize |
| 571 | * to complete, card might be still in programming state |
| 572 | * so let's try to bring the card out of programming |
| 573 | * state. |
| 574 | */ |
| 575 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { |
| 576 | if (!mmc_interrupt_hpi(host->card)) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 577 | pr_warn("%s: %s: Interrupted sanitize\n", |
| 578 | mmc_hostname(host), __func__); |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 579 | cmd->error = 0; |
| 580 | break; |
| 581 | } else { |
| 582 | pr_err("%s: %s: Failed to interrupt sanitize\n", |
| 583 | mmc_hostname(host), __func__); |
| 584 | } |
| 585 | } |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 586 | if (!cmd->error || !cmd->retries || |
| 587 | mmc_card_removed(host->card)) |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 588 | break; |
| 589 | |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 590 | mmc_retune_recheck(host); |
| 591 | |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 592 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
| 593 | mmc_hostname(host), cmd->opcode, cmd->error); |
| 594 | cmd->retries--; |
| 595 | cmd->error = 0; |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 596 | __mmc_start_request(host, mrq); |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 597 | } |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 598 | |
| 599 | mmc_retune_release(host); |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 600 | } |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 601 | EXPORT_SYMBOL(mmc_wait_for_req_done); |
| 602 | |
| 603 | /** |
| 604 | * mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done |
| 605 | * @host: MMC host |
| 606 | * @mrq: MMC request |
| 607 | * |
| 608 | * mmc_is_req_done() is used with requests that have |
| 609 | * mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after |
| 610 | * starting a request and before waiting for it to complete. That is, |
| 611 | * either in between calls to mmc_start_req(), or after mmc_wait_for_req() |
| 612 | * and before mmc_wait_for_req_done(). If it is called at other times the |
| 613 | * result is not meaningful. |
| 614 | */ |
| 615 | bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) |
| 616 | { |
| 617 | if (host->areq) |
| 618 | return host->context_info.is_done_rcv; |
| 619 | else |
| 620 | return completion_done(&mrq->completion); |
| 621 | } |
| 622 | EXPORT_SYMBOL(mmc_is_req_done); |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 623 | |
| 624 | /** |
| 625 | * mmc_pre_req - Prepare for a new request |
| 626 | * @host: MMC host to prepare command |
| 627 | * @mrq: MMC request to prepare for |
| 628 | * @is_first_req: true if there is no previous started request |
| 629 | * that may run in parellel to this call, otherwise false |
| 630 | * |
| 631 | * mmc_pre_req() is called in prior to mmc_start_req() to let |
| 632 | * host prepare for the new request. Preparation of a request may be |
| 633 | * performed while another request is running on the host. |
| 634 | */ |
| 635 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, |
| 636 | bool is_first_req) |
| 637 | { |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 638 | if (host->ops->pre_req) |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 639 | host->ops->pre_req(host, mrq, is_first_req); |
| 640 | } |
| 641 | |
| 642 | /** |
| 643 | * mmc_post_req - Post process a completed request |
| 644 | * @host: MMC host to post process command |
| 645 | * @mrq: MMC request to post process for |
| 646 | * @err: Error, if non zero, clean up any resources made in pre_req |
| 647 | * |
| 648 | * Let the host post process a completed request. Post processing of |
| 649 | * a request may be performed while another reuqest is running. |
| 650 | */ |
| 651 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, |
| 652 | int err) |
| 653 | { |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 654 | if (host->ops->post_req) |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 655 | host->ops->post_req(host, mrq, err); |
| 656 | } |
| 657 | |
| 658 | /** |
| 659 | * mmc_start_req - start a non-blocking request |
| 660 | * @host: MMC host to start command |
| 661 | * @areq: async request to start |
| 662 | * @error: out parameter returns 0 for success, otherwise non zero |
| 663 | * |
| 664 | * Start a new MMC custom command request for a host. |
| 665 | * If there is on ongoing async request wait for completion |
| 666 | * of that request and start the new one and return. |
| 667 | * Does not wait for the new request to complete. |
| 668 | * |
| 669 | * Returns the completed request, NULL in case of none completed. |
| 670 | * Wait for the an ongoing request (previoulsy started) to complete and |
| 671 | * return the completed request. If there is no ongoing request, NULL |
| 672 | * is returned without waiting. NULL is not an error condition. |
| 673 | */ |
| 674 | struct mmc_async_req *mmc_start_req(struct mmc_host *host, |
| 675 | struct mmc_async_req *areq, int *error) |
| 676 | { |
| 677 | int err = 0; |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 678 | int start_err = 0; |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 679 | struct mmc_async_req *data = host->areq; |
| 680 | |
| 681 | /* Prepare a new request */ |
| 682 | if (areq) |
| 683 | mmc_pre_req(host, areq->mrq, !host->areq); |
| 684 | |
| 685 | if (host->areq) { |
Jaehoon Chung | f5c2758 | 2013-02-01 14:32:22 +0900 | [diff] [blame] | 686 | err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq); |
| 687 | if (err == MMC_BLK_NEW_REQUEST) { |
| 688 | if (error) |
| 689 | *error = err; |
| 690 | /* |
| 691 | * The previous request was not completed, |
| 692 | * nothing to return |
| 693 | */ |
| 694 | return NULL; |
| 695 | } |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 696 | /* |
| 697 | * Check BKOPS urgency for each R1 response |
| 698 | */ |
| 699 | if (host->card && mmc_card_mmc(host->card) && |
| 700 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || |
| 701 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && |
Srinivas Kandagatla | 64b12a6 | 2014-10-08 12:24:24 +0100 | [diff] [blame] | 702 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { |
| 703 | |
| 704 | /* Cancel the prepared request */ |
| 705 | if (areq) |
| 706 | mmc_post_req(host, areq->mrq, -EINVAL); |
| 707 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 708 | mmc_start_bkops(host->card, true); |
Srinivas Kandagatla | 64b12a6 | 2014-10-08 12:24:24 +0100 | [diff] [blame] | 709 | |
| 710 | /* prepare the request again */ |
| 711 | if (areq) |
| 712 | mmc_pre_req(host, areq->mrq, !host->areq); |
| 713 | } |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 714 | } |
| 715 | |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 716 | if (!err && areq) { |
| 717 | #ifdef CONFIG_BLOCK |
| 718 | if (host->latency_hist_enabled) { |
| 719 | areq->mrq->io_start = ktime_get(); |
| 720 | areq->mrq->lat_hist_enabled = 1; |
| 721 | } else |
| 722 | areq->mrq->lat_hist_enabled = 0; |
| 723 | #endif |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 724 | start_err = __mmc_start_data_req(host, areq->mrq); |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 725 | } |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 726 | |
| 727 | if (host->areq) |
| 728 | mmc_post_req(host, host->areq->mrq, 0); |
| 729 | |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 730 | /* Cancel a prepared request if it was not started. */ |
| 731 | if ((err || start_err) && areq) |
Jaehoon Chung | f5c2758 | 2013-02-01 14:32:22 +0900 | [diff] [blame] | 732 | mmc_post_req(host, areq->mrq, -EINVAL); |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 733 | |
| 734 | if (err) |
| 735 | host->areq = NULL; |
| 736 | else |
| 737 | host->areq = areq; |
| 738 | |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 739 | if (error) |
| 740 | *error = err; |
| 741 | return data; |
| 742 | } |
| 743 | EXPORT_SYMBOL(mmc_start_req); |
| 744 | |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 745 | /** |
| 746 | * mmc_wait_for_req - start a request and wait for completion |
| 747 | * @host: MMC host to start command |
| 748 | * @mrq: MMC request to start |
| 749 | * |
| 750 | * Start a new MMC custom command request for a host, and wait |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 751 | * for the command to complete. In the case of 'cap_cmd_during_tfr' |
| 752 | * requests, the transfer is ongoing and the caller can issue further |
| 753 | * commands that do not use the data lines, and then wait by calling |
| 754 | * mmc_wait_for_req_done(). |
| 755 | * Does not attempt to parse the response. |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 756 | */ |
| 757 | void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | { |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 759 | __mmc_start_req(host, mrq); |
Adrian Hunter | 5163af5 | 2016-08-16 13:44:11 +0300 | [diff] [blame] | 760 | |
| 761 | if (!mrq->cap_cmd_during_tfr) |
| 762 | mmc_wait_for_req_done(host, mrq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | EXPORT_SYMBOL(mmc_wait_for_req); |
| 765 | |
| 766 | /** |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 767 | * mmc_interrupt_hpi - Issue for High priority Interrupt |
| 768 | * @card: the MMC card associated with the HPI transfer |
| 769 | * |
| 770 | * Issued High Priority Interrupt, and check for card status |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 771 | * until out-of prg-state. |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 772 | */ |
| 773 | int mmc_interrupt_hpi(struct mmc_card *card) |
| 774 | { |
| 775 | int err; |
| 776 | u32 status; |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 777 | unsigned long prg_wait; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 778 | |
| 779 | BUG_ON(!card); |
| 780 | |
| 781 | if (!card->ext_csd.hpi_en) { |
| 782 | pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); |
| 783 | return 1; |
| 784 | } |
| 785 | |
| 786 | mmc_claim_host(card->host); |
| 787 | err = mmc_send_status(card, &status); |
| 788 | if (err) { |
| 789 | pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); |
| 790 | goto out; |
| 791 | } |
| 792 | |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 793 | switch (R1_CURRENT_STATE(status)) { |
| 794 | case R1_STATE_IDLE: |
| 795 | case R1_STATE_READY: |
| 796 | case R1_STATE_STBY: |
Venkatraman S | 211d4fe | 2012-08-07 19:24:45 +0530 | [diff] [blame] | 797 | case R1_STATE_TRAN: |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 798 | /* |
Venkatraman S | 211d4fe | 2012-08-07 19:24:45 +0530 | [diff] [blame] | 799 | * In idle and transfer states, HPI is not needed and the caller |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 800 | * can issue the next intended command immediately |
| 801 | */ |
| 802 | goto out; |
| 803 | case R1_STATE_PRG: |
| 804 | break; |
| 805 | default: |
| 806 | /* In all other states, it's illegal to issue HPI */ |
| 807 | pr_debug("%s: HPI cannot be sent. Card state=%d\n", |
| 808 | mmc_hostname(card->host), R1_CURRENT_STATE(status)); |
| 809 | err = -EINVAL; |
| 810 | goto out; |
| 811 | } |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 812 | |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 813 | err = mmc_send_hpi_cmd(card, &status); |
| 814 | if (err) |
| 815 | goto out; |
| 816 | |
| 817 | prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); |
| 818 | do { |
| 819 | err = mmc_send_status(card, &status); |
| 820 | |
| 821 | if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) |
| 822 | break; |
| 823 | if (time_after(jiffies, prg_wait)) |
| 824 | err = -ETIMEDOUT; |
| 825 | } while (!err); |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 826 | |
| 827 | out: |
| 828 | mmc_release_host(card->host); |
| 829 | return err; |
| 830 | } |
| 831 | EXPORT_SYMBOL(mmc_interrupt_hpi); |
| 832 | |
| 833 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | * mmc_wait_for_cmd - start a command and wait for completion |
| 835 | * @host: MMC host to start command |
| 836 | * @cmd: MMC command to start |
| 837 | * @retries: maximum number of retries |
| 838 | * |
| 839 | * Start a new MMC command for a host, and wait for the command |
| 840 | * to complete. Return any error that occurred while the command |
| 841 | * was executing. Do not attempt to parse the response. |
| 842 | */ |
| 843 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) |
| 844 | { |
Venkatraman S | ad5fd97 | 2011-08-25 00:30:50 +0530 | [diff] [blame] | 845 | struct mmc_request mrq = {NULL}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 847 | WARN_ON(!host->claimed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
| 850 | cmd->retries = retries; |
| 851 | |
| 852 | mrq.cmd = cmd; |
| 853 | cmd->data = NULL; |
| 854 | |
| 855 | mmc_wait_for_req(host, &mrq); |
| 856 | |
| 857 | return cmd->error; |
| 858 | } |
| 859 | |
| 860 | EXPORT_SYMBOL(mmc_wait_for_cmd); |
| 861 | |
Pierre Ossman | 335eadf | 2005-09-06 15:18:50 -0700 | [diff] [blame] | 862 | /** |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 863 | * mmc_stop_bkops - stop ongoing BKOPS |
| 864 | * @card: MMC card to check BKOPS |
| 865 | * |
| 866 | * Send HPI command to stop ongoing background operations to |
| 867 | * allow rapid servicing of foreground operations, e.g. read/ |
| 868 | * writes. Wait until the card comes out of the programming state |
| 869 | * to avoid errors in servicing read/write requests. |
| 870 | */ |
| 871 | int mmc_stop_bkops(struct mmc_card *card) |
| 872 | { |
| 873 | int err = 0; |
| 874 | |
| 875 | BUG_ON(!card); |
| 876 | err = mmc_interrupt_hpi(card); |
| 877 | |
| 878 | /* |
| 879 | * If err is EINVAL, we can't issue an HPI. |
| 880 | * It should complete the BKOPS. |
| 881 | */ |
| 882 | if (!err || (err == -EINVAL)) { |
| 883 | mmc_card_clr_doing_bkops(card); |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 884 | mmc_retune_release(card->host); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 885 | err = 0; |
| 886 | } |
| 887 | |
| 888 | return err; |
| 889 | } |
| 890 | EXPORT_SYMBOL(mmc_stop_bkops); |
| 891 | |
| 892 | int mmc_read_bkops_status(struct mmc_card *card) |
| 893 | { |
| 894 | int err; |
| 895 | u8 *ext_csd; |
| 896 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 897 | mmc_claim_host(card->host); |
Ulf Hansson | b2cada7 | 2014-10-17 11:48:23 +0200 | [diff] [blame] | 898 | err = mmc_get_ext_csd(card, &ext_csd); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 899 | mmc_release_host(card->host); |
| 900 | if (err) |
Ulf Hansson | b2cada7 | 2014-10-17 11:48:23 +0200 | [diff] [blame] | 901 | return err; |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 902 | |
| 903 | card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; |
| 904 | card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 905 | kfree(ext_csd); |
Ulf Hansson | b2cada7 | 2014-10-17 11:48:23 +0200 | [diff] [blame] | 906 | return 0; |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 907 | } |
| 908 | EXPORT_SYMBOL(mmc_read_bkops_status); |
| 909 | |
| 910 | /** |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 911 | * mmc_set_data_timeout - set the timeout for a data command |
| 912 | * @data: data phase for command |
| 913 | * @card: the MMC card associated with the data transfer |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 914 | * |
| 915 | * Computes the data timeout parameters according to the |
| 916 | * correct algorithm given the card type. |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 917 | */ |
Pierre Ossman | b146d26 | 2007-07-24 19:16:54 +0200 | [diff] [blame] | 918 | void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 919 | { |
| 920 | unsigned int mult; |
| 921 | |
| 922 | /* |
Pierre Ossman | e6f918b | 2007-08-07 14:11:55 +0200 | [diff] [blame] | 923 | * SDIO cards only define an upper 1 s limit on access. |
| 924 | */ |
| 925 | if (mmc_card_sdio(card)) { |
| 926 | data->timeout_ns = 1000000000; |
| 927 | data->timeout_clks = 0; |
| 928 | return; |
| 929 | } |
| 930 | |
| 931 | /* |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 932 | * SD cards use a 100 multiplier rather than 10 |
| 933 | */ |
| 934 | mult = mmc_card_sd(card) ? 100 : 10; |
| 935 | |
| 936 | /* |
| 937 | * Scale up the multiplier (and therefore the timeout) by |
| 938 | * the r2w factor for writes. |
| 939 | */ |
Pierre Ossman | b146d26 | 2007-07-24 19:16:54 +0200 | [diff] [blame] | 940 | if (data->flags & MMC_DATA_WRITE) |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 941 | mult <<= card->csd.r2w_factor; |
| 942 | |
| 943 | data->timeout_ns = card->csd.tacc_ns * mult; |
| 944 | data->timeout_clks = card->csd.tacc_clks * mult; |
| 945 | |
| 946 | /* |
| 947 | * SD cards also have an upper limit on the timeout. |
| 948 | */ |
| 949 | if (mmc_card_sd(card)) { |
| 950 | unsigned int timeout_us, limit_us; |
| 951 | |
| 952 | timeout_us = data->timeout_ns / 1000; |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 953 | if (card->host->ios.clock) |
Linus Walleij | e9b8684 | 2011-01-05 00:44:32 +0100 | [diff] [blame] | 954 | timeout_us += data->timeout_clks * 1000 / |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 955 | (card->host->ios.clock / 1000); |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 956 | |
Pierre Ossman | b146d26 | 2007-07-24 19:16:54 +0200 | [diff] [blame] | 957 | if (data->flags & MMC_DATA_WRITE) |
Pierre Ossman | 493890e | 2008-10-26 12:37:25 +0100 | [diff] [blame] | 958 | /* |
Paul Walmsley | 3bdc9ba | 2012-03-12 04:58:00 -0600 | [diff] [blame] | 959 | * The MMC spec "It is strongly recommended |
| 960 | * for hosts to implement more than 500ms |
| 961 | * timeout value even if the card indicates |
| 962 | * the 250ms maximum busy length." Even the |
| 963 | * previous value of 300ms is known to be |
| 964 | * insufficient for some cards. |
Pierre Ossman | 493890e | 2008-10-26 12:37:25 +0100 | [diff] [blame] | 965 | */ |
Paul Walmsley | 3bdc9ba | 2012-03-12 04:58:00 -0600 | [diff] [blame] | 966 | limit_us = 3000000; |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 967 | else |
| 968 | limit_us = 100000; |
| 969 | |
Philip Langdale | fba68bd | 2007-01-04 06:57:32 -0800 | [diff] [blame] | 970 | /* |
| 971 | * SDHC cards always use these fixed values. |
| 972 | */ |
| 973 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 974 | data->timeout_ns = limit_us * 1000; |
| 975 | data->timeout_clks = 0; |
| 976 | } |
Stefan Wahren | f7bf11a | 2014-04-03 17:32:05 +0200 | [diff] [blame] | 977 | |
| 978 | /* assign limit value if invalid */ |
| 979 | if (timeout_us == 0) |
| 980 | data->timeout_ns = limit_us * 1000; |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 981 | } |
Stefan Nilsson XK | 6de5fc9 | 2011-11-03 09:44:12 +0100 | [diff] [blame] | 982 | |
| 983 | /* |
| 984 | * Some cards require longer data read timeout than indicated in CSD. |
| 985 | * Address this by setting the read timeout to a "reasonably high" |
Matt Gumbel | 32ecd32 | 2016-05-20 10:33:46 +0300 | [diff] [blame] | 986 | * value. For the cards tested, 600ms has proven enough. If necessary, |
Stefan Nilsson XK | 6de5fc9 | 2011-11-03 09:44:12 +0100 | [diff] [blame] | 987 | * this value can be increased if other problematic cards require this. |
| 988 | */ |
| 989 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { |
Matt Gumbel | 32ecd32 | 2016-05-20 10:33:46 +0300 | [diff] [blame] | 990 | data->timeout_ns = 600000000; |
Stefan Nilsson XK | 6de5fc9 | 2011-11-03 09:44:12 +0100 | [diff] [blame] | 991 | data->timeout_clks = 0; |
| 992 | } |
| 993 | |
Wolfgang Muees | c0c8887 | 2009-03-11 14:28:39 +0100 | [diff] [blame] | 994 | /* |
| 995 | * Some cards need very high timeouts if driven in SPI mode. |
| 996 | * The worst observed timeout was 900ms after writing a |
| 997 | * continuous stream of data until the internal logic |
| 998 | * overflowed. |
| 999 | */ |
| 1000 | if (mmc_host_is_spi(card->host)) { |
| 1001 | if (data->flags & MMC_DATA_WRITE) { |
| 1002 | if (data->timeout_ns < 1000000000) |
| 1003 | data->timeout_ns = 1000000000; /* 1s */ |
| 1004 | } else { |
| 1005 | if (data->timeout_ns < 100000000) |
| 1006 | data->timeout_ns = 100000000; /* 100ms */ |
| 1007 | } |
| 1008 | } |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 1009 | } |
| 1010 | EXPORT_SYMBOL(mmc_set_data_timeout); |
| 1011 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | /** |
Pierre Ossman | ad3868b | 2008-06-28 12:52:45 +0200 | [diff] [blame] | 1013 | * mmc_align_data_size - pads a transfer size to a more optimal value |
| 1014 | * @card: the MMC card associated with the data transfer |
| 1015 | * @sz: original transfer size |
| 1016 | * |
| 1017 | * Pads the original data size with a number of extra bytes in |
| 1018 | * order to avoid controller bugs and/or performance hits |
| 1019 | * (e.g. some controllers revert to PIO for certain sizes). |
| 1020 | * |
| 1021 | * Returns the improved size, which might be unmodified. |
| 1022 | * |
| 1023 | * Note that this function is only relevant when issuing a |
| 1024 | * single scatter gather entry. |
| 1025 | */ |
| 1026 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) |
| 1027 | { |
| 1028 | /* |
| 1029 | * FIXME: We don't have a system for the controller to tell |
| 1030 | * the core about its problems yet, so for now we just 32-bit |
| 1031 | * align the size. |
| 1032 | */ |
| 1033 | sz = ((sz + 3) / 4) * 4; |
| 1034 | |
| 1035 | return sz; |
| 1036 | } |
| 1037 | EXPORT_SYMBOL(mmc_align_data_size); |
| 1038 | |
| 1039 | /** |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1040 | * __mmc_claim_host - exclusively claim a host |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | * @host: mmc host to claim |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1042 | * @abort: whether or not the operation should be aborted |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | * |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1044 | * Claim a host for a set of operations. If @abort is non null and |
| 1045 | * dereference a non-zero value then this will return prematurely with |
| 1046 | * that non-zero value without acquiring the lock. Returns zero |
| 1047 | * with the lock held otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | */ |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1049 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | { |
| 1051 | DECLARE_WAITQUEUE(wait, current); |
| 1052 | unsigned long flags; |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1053 | int stop; |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 1054 | bool pm = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | |
Pierre Ossman | cf795bf | 2007-07-11 20:28:02 +0200 | [diff] [blame] | 1056 | might_sleep(); |
| 1057 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | add_wait_queue(&host->wq, &wait); |
| 1059 | spin_lock_irqsave(&host->lock, flags); |
| 1060 | while (1) { |
| 1061 | set_current_state(TASK_UNINTERRUPTIBLE); |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1062 | stop = abort ? atomic_read(abort) : 0; |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1063 | if (stop || !host->claimed || host->claimer == current) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | break; |
| 1065 | spin_unlock_irqrestore(&host->lock, flags); |
| 1066 | schedule(); |
| 1067 | spin_lock_irqsave(&host->lock, flags); |
| 1068 | } |
| 1069 | set_current_state(TASK_RUNNING); |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1070 | if (!stop) { |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1071 | host->claimed = 1; |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1072 | host->claimer = current; |
| 1073 | host->claim_cnt += 1; |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 1074 | if (host->claim_cnt == 1) |
| 1075 | pm = true; |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1076 | } else |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1077 | wake_up(&host->wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | spin_unlock_irqrestore(&host->lock, flags); |
| 1079 | remove_wait_queue(&host->wq, &wait); |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 1080 | |
| 1081 | if (pm) |
| 1082 | pm_runtime_get_sync(mmc_dev(host)); |
| 1083 | |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1084 | return stop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | } |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 1086 | EXPORT_SYMBOL(__mmc_claim_host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1088 | /** |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 1089 | * mmc_release_host - release a host |
Ulf Hansson | ab1efd2 | 2011-03-09 09:11:02 +0100 | [diff] [blame] | 1090 | * @host: mmc host to release |
| 1091 | * |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 1092 | * Release a MMC host, allowing others to claim the host |
| 1093 | * for their operations. |
Ulf Hansson | ab1efd2 | 2011-03-09 09:11:02 +0100 | [diff] [blame] | 1094 | */ |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 1095 | void mmc_release_host(struct mmc_host *host) |
Adrian Hunter | 8ea926b | 2009-09-22 16:44:29 -0700 | [diff] [blame] | 1096 | { |
| 1097 | unsigned long flags; |
| 1098 | |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 1099 | WARN_ON(!host->claimed); |
| 1100 | |
Adrian Hunter | 8ea926b | 2009-09-22 16:44:29 -0700 | [diff] [blame] | 1101 | spin_lock_irqsave(&host->lock, flags); |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1102 | if (--host->claim_cnt) { |
| 1103 | /* Release for nested claim */ |
| 1104 | spin_unlock_irqrestore(&host->lock, flags); |
| 1105 | } else { |
| 1106 | host->claimed = 0; |
| 1107 | host->claimer = NULL; |
| 1108 | spin_unlock_irqrestore(&host->lock, flags); |
| 1109 | wake_up(&host->wq); |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 1110 | pm_runtime_mark_last_busy(mmc_dev(host)); |
| 1111 | pm_runtime_put_autosuspend(mmc_dev(host)); |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1112 | } |
Adrian Hunter | 8ea926b | 2009-09-22 16:44:29 -0700 | [diff] [blame] | 1113 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | EXPORT_SYMBOL(mmc_release_host); |
| 1115 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1116 | /* |
Ulf Hansson | e94cfef | 2013-05-02 14:02:38 +0200 | [diff] [blame] | 1117 | * This is a helper function, which fetches a runtime pm reference for the |
| 1118 | * card device and also claims the host. |
| 1119 | */ |
| 1120 | void mmc_get_card(struct mmc_card *card) |
| 1121 | { |
| 1122 | pm_runtime_get_sync(&card->dev); |
| 1123 | mmc_claim_host(card->host); |
| 1124 | } |
| 1125 | EXPORT_SYMBOL(mmc_get_card); |
| 1126 | |
| 1127 | /* |
| 1128 | * This is a helper function, which releases the host and drops the runtime |
| 1129 | * pm reference for the card device. |
| 1130 | */ |
| 1131 | void mmc_put_card(struct mmc_card *card) |
| 1132 | { |
| 1133 | mmc_release_host(card->host); |
| 1134 | pm_runtime_mark_last_busy(&card->dev); |
| 1135 | pm_runtime_put_autosuspend(&card->dev); |
| 1136 | } |
| 1137 | EXPORT_SYMBOL(mmc_put_card); |
| 1138 | |
| 1139 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1140 | * Internal function that does the actual ios call to the host driver, |
| 1141 | * optionally printing some debug output. |
| 1142 | */ |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1143 | static inline void mmc_set_ios(struct mmc_host *host) |
| 1144 | { |
| 1145 | struct mmc_ios *ios = &host->ios; |
| 1146 | |
Pierre Ossman | cd9277c | 2007-02-18 12:07:47 +0100 | [diff] [blame] | 1147 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
| 1148 | "width %u timing %u\n", |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1149 | mmc_hostname(host), ios->clock, ios->bus_mode, |
| 1150 | ios->power_mode, ios->chip_select, ios->vdd, |
Wolfram Sang | ed9feec | 2016-01-29 09:27:50 +0100 | [diff] [blame] | 1151 | 1 << ios->bus_width, ios->timing); |
Philip Langdale | fba68bd | 2007-01-04 06:57:32 -0800 | [diff] [blame] | 1152 | |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1153 | host->ops->set_ios(host, ios); |
| 1154 | } |
| 1155 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1156 | /* |
| 1157 | * Control chip select pin on a host. |
| 1158 | */ |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 1159 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
Pierre Ossman | b57c43a | 2005-09-06 15:18:53 -0700 | [diff] [blame] | 1160 | { |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 1161 | host->ios.chip_select = mode; |
| 1162 | mmc_set_ios(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | } |
| 1164 | |
| 1165 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1166 | * Sets the host clock to the highest possible frequency that |
| 1167 | * is below "hz". |
| 1168 | */ |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 1169 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1170 | { |
Adrian Hunter | 6a98f1e | 2014-09-23 23:00:26 +0300 | [diff] [blame] | 1171 | WARN_ON(hz && hz < host->f_min); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1172 | |
| 1173 | if (hz > host->f_max) |
| 1174 | hz = host->f_max; |
| 1175 | |
| 1176 | host->ios.clock = hz; |
| 1177 | mmc_set_ios(host); |
| 1178 | } |
| 1179 | |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1180 | int mmc_execute_tuning(struct mmc_card *card) |
| 1181 | { |
| 1182 | struct mmc_host *host = card->host; |
| 1183 | u32 opcode; |
| 1184 | int err; |
| 1185 | |
| 1186 | if (!host->ops->execute_tuning) |
| 1187 | return 0; |
| 1188 | |
| 1189 | if (mmc_card_mmc(card)) |
| 1190 | opcode = MMC_SEND_TUNING_BLOCK_HS200; |
| 1191 | else |
| 1192 | opcode = MMC_SEND_TUNING_BLOCK; |
| 1193 | |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1194 | err = host->ops->execute_tuning(host, opcode); |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1195 | |
| 1196 | if (err) |
Russell King | 07d97d8 | 2016-01-29 09:44:05 +0000 | [diff] [blame] | 1197 | pr_err("%s: tuning execution failed: %d\n", |
| 1198 | mmc_hostname(host), err); |
Adrian Hunter | 79d5a65 | 2015-05-07 13:10:13 +0300 | [diff] [blame] | 1199 | else |
| 1200 | mmc_retune_enable(host); |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1201 | |
| 1202 | return err; |
| 1203 | } |
| 1204 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1205 | /* |
| 1206 | * Change the bus mode (open drain/push-pull) of a host. |
| 1207 | */ |
| 1208 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) |
| 1209 | { |
| 1210 | host->ios.bus_mode = mode; |
| 1211 | mmc_set_ios(host); |
| 1212 | } |
| 1213 | |
| 1214 | /* |
| 1215 | * Change data bus width of a host. |
| 1216 | */ |
| 1217 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) |
| 1218 | { |
Philip Rakity | 4c4cb17 | 2011-05-13 11:17:18 +0530 | [diff] [blame] | 1219 | host->ios.bus_width = width; |
| 1220 | mmc_set_ios(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1221 | } |
| 1222 | |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1223 | /* |
| 1224 | * Set initial state after a power cycle or a hw_reset. |
| 1225 | */ |
| 1226 | void mmc_set_initial_state(struct mmc_host *host) |
| 1227 | { |
Adrian Hunter | 79d5a65 | 2015-05-07 13:10:13 +0300 | [diff] [blame] | 1228 | mmc_retune_disable(host); |
| 1229 | |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1230 | if (mmc_host_is_spi(host)) |
| 1231 | host->ios.chip_select = MMC_CS_HIGH; |
| 1232 | else |
| 1233 | host->ios.chip_select = MMC_CS_DONTCARE; |
| 1234 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; |
| 1235 | host->ios.bus_width = MMC_BUS_WIDTH_1; |
| 1236 | host->ios.timing = MMC_TIMING_LEGACY; |
Adrian Hunter | 75e8a22 | 2015-02-06 14:12:51 +0200 | [diff] [blame] | 1237 | host->ios.drv_type = 0; |
Shawn Lin | 81ac2af | 2016-05-26 09:56:22 +0800 | [diff] [blame] | 1238 | host->ios.enhanced_strobe = false; |
| 1239 | |
| 1240 | /* |
| 1241 | * Make sure we are in non-enhanced strobe mode before we |
| 1242 | * actually enable it in ext_csd. |
| 1243 | */ |
| 1244 | if ((host->caps2 & MMC_CAP2_HS400_ES) && |
| 1245 | host->ops->hs400_enhanced_strobe) |
| 1246 | host->ops->hs400_enhanced_strobe(host, &host->ios); |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1247 | |
| 1248 | mmc_set_ios(host); |
| 1249 | } |
| 1250 | |
Anton Vorontsov | 86e8286 | 2008-11-26 22:54:17 +0300 | [diff] [blame] | 1251 | /** |
| 1252 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number |
| 1253 | * @vdd: voltage (mV) |
| 1254 | * @low_bits: prefer low bits in boundary cases |
| 1255 | * |
| 1256 | * This function returns the OCR bit number according to the provided @vdd |
| 1257 | * value. If conversion is not possible a negative errno value returned. |
| 1258 | * |
| 1259 | * Depending on the @low_bits flag the function prefers low or high OCR bits |
| 1260 | * on boundary voltages. For example, |
| 1261 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); |
| 1262 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); |
| 1263 | * |
| 1264 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). |
| 1265 | */ |
| 1266 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) |
| 1267 | { |
| 1268 | const int max_bit = ilog2(MMC_VDD_35_36); |
| 1269 | int bit; |
| 1270 | |
| 1271 | if (vdd < 1650 || vdd > 3600) |
| 1272 | return -EINVAL; |
| 1273 | |
| 1274 | if (vdd >= 1650 && vdd <= 1950) |
| 1275 | return ilog2(MMC_VDD_165_195); |
| 1276 | |
| 1277 | if (low_bits) |
| 1278 | vdd -= 1; |
| 1279 | |
| 1280 | /* Base 2000 mV, step 100 mV, bit's base 8. */ |
| 1281 | bit = (vdd - 2000) / 100 + 8; |
| 1282 | if (bit > max_bit) |
| 1283 | return max_bit; |
| 1284 | return bit; |
| 1285 | } |
| 1286 | |
| 1287 | /** |
| 1288 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask |
| 1289 | * @vdd_min: minimum voltage value (mV) |
| 1290 | * @vdd_max: maximum voltage value (mV) |
| 1291 | * |
| 1292 | * This function returns the OCR mask bits according to the provided @vdd_min |
| 1293 | * and @vdd_max values. If conversion is not possible the function returns 0. |
| 1294 | * |
| 1295 | * Notes wrt boundary cases: |
| 1296 | * This function sets the OCR bits for all boundary voltages, for example |
| 1297 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | |
| 1298 | * MMC_VDD_34_35 mask. |
| 1299 | */ |
| 1300 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) |
| 1301 | { |
| 1302 | u32 mask = 0; |
| 1303 | |
| 1304 | if (vdd_max < vdd_min) |
| 1305 | return 0; |
| 1306 | |
| 1307 | /* Prefer high bits for the boundary vdd_max values. */ |
| 1308 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); |
| 1309 | if (vdd_max < 0) |
| 1310 | return 0; |
| 1311 | |
| 1312 | /* Prefer low bits for the boundary vdd_min values. */ |
| 1313 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); |
| 1314 | if (vdd_min < 0) |
| 1315 | return 0; |
| 1316 | |
| 1317 | /* Fill the mask, from max bit to min bit. */ |
| 1318 | while (vdd_max >= vdd_min) |
| 1319 | mask |= 1 << vdd_max--; |
| 1320 | |
| 1321 | return mask; |
| 1322 | } |
| 1323 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); |
| 1324 | |
Haijun Zhang | 6e9e318 | 2013-08-26 09:19:22 +0800 | [diff] [blame] | 1325 | #ifdef CONFIG_OF |
| 1326 | |
| 1327 | /** |
| 1328 | * mmc_of_parse_voltage - return mask of supported voltages |
| 1329 | * @np: The device node need to be parsed. |
| 1330 | * @mask: mask of voltages available for MMC/SD/SDIO |
| 1331 | * |
Russell King | cf92574 | 2016-01-29 09:43:55 +0000 | [diff] [blame] | 1332 | * Parse the "voltage-ranges" DT property, returning zero if it is not |
| 1333 | * found, negative errno if the voltage-range specification is invalid, |
| 1334 | * or one if the voltage-range is specified and successfully parsed. |
Haijun Zhang | 6e9e318 | 2013-08-26 09:19:22 +0800 | [diff] [blame] | 1335 | */ |
| 1336 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) |
| 1337 | { |
| 1338 | const u32 *voltage_ranges; |
| 1339 | int num_ranges, i; |
| 1340 | |
| 1341 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); |
| 1342 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; |
Russell King | 10a16a0 | 2016-01-29 09:43:50 +0000 | [diff] [blame] | 1343 | if (!voltage_ranges) { |
| 1344 | pr_debug("%s: voltage-ranges unspecified\n", np->full_name); |
Russell King | cf92574 | 2016-01-29 09:43:55 +0000 | [diff] [blame] | 1345 | return 0; |
Russell King | 10a16a0 | 2016-01-29 09:43:50 +0000 | [diff] [blame] | 1346 | } |
| 1347 | if (!num_ranges) { |
| 1348 | pr_err("%s: voltage-ranges empty\n", np->full_name); |
Haijun Zhang | 6e9e318 | 2013-08-26 09:19:22 +0800 | [diff] [blame] | 1349 | return -EINVAL; |
| 1350 | } |
| 1351 | |
| 1352 | for (i = 0; i < num_ranges; i++) { |
| 1353 | const int j = i * 2; |
| 1354 | u32 ocr_mask; |
| 1355 | |
| 1356 | ocr_mask = mmc_vddrange_to_ocrmask( |
| 1357 | be32_to_cpu(voltage_ranges[j]), |
| 1358 | be32_to_cpu(voltage_ranges[j + 1])); |
| 1359 | if (!ocr_mask) { |
| 1360 | pr_err("%s: voltage-range #%d is invalid\n", |
| 1361 | np->full_name, i); |
| 1362 | return -EINVAL; |
| 1363 | } |
| 1364 | *mask |= ocr_mask; |
| 1365 | } |
| 1366 | |
Russell King | cf92574 | 2016-01-29 09:43:55 +0000 | [diff] [blame] | 1367 | return 1; |
Haijun Zhang | 6e9e318 | 2013-08-26 09:19:22 +0800 | [diff] [blame] | 1368 | } |
| 1369 | EXPORT_SYMBOL(mmc_of_parse_voltage); |
| 1370 | |
| 1371 | #endif /* CONFIG_OF */ |
| 1372 | |
Sascha Hauer | 25185f3 | 2014-06-30 11:07:25 +0200 | [diff] [blame] | 1373 | static int mmc_of_get_func_num(struct device_node *node) |
| 1374 | { |
| 1375 | u32 reg; |
| 1376 | int ret; |
| 1377 | |
| 1378 | ret = of_property_read_u32(node, "reg", ®); |
| 1379 | if (ret < 0) |
| 1380 | return ret; |
| 1381 | |
| 1382 | return reg; |
| 1383 | } |
| 1384 | |
| 1385 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, |
| 1386 | unsigned func_num) |
| 1387 | { |
| 1388 | struct device_node *node; |
| 1389 | |
| 1390 | if (!host->parent || !host->parent->of_node) |
| 1391 | return NULL; |
| 1392 | |
| 1393 | for_each_child_of_node(host->parent->of_node, node) { |
| 1394 | if (mmc_of_get_func_num(node) == func_num) |
| 1395 | return node; |
| 1396 | } |
| 1397 | |
| 1398 | return NULL; |
| 1399 | } |
| 1400 | |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1401 | #ifdef CONFIG_REGULATOR |
| 1402 | |
| 1403 | /** |
Heiko Stuebner | 310c805 | 2015-10-12 18:00:54 +0200 | [diff] [blame] | 1404 | * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage |
| 1405 | * @vdd_bit: OCR bit number |
| 1406 | * @min_uV: minimum voltage value (mV) |
| 1407 | * @max_uV: maximum voltage value (mV) |
| 1408 | * |
| 1409 | * This function returns the voltage range according to the provided OCR |
| 1410 | * bit number. If conversion is not possible a negative errno value returned. |
| 1411 | */ |
| 1412 | static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV) |
| 1413 | { |
| 1414 | int tmp; |
| 1415 | |
| 1416 | if (!vdd_bit) |
| 1417 | return -EINVAL; |
| 1418 | |
| 1419 | /* |
| 1420 | * REVISIT mmc_vddrange_to_ocrmask() may have set some |
| 1421 | * bits this regulator doesn't quite support ... don't |
| 1422 | * be too picky, most cards and regulators are OK with |
| 1423 | * a 0.1V range goof (it's a small error percentage). |
| 1424 | */ |
| 1425 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); |
| 1426 | if (tmp == 0) { |
| 1427 | *min_uV = 1650 * 1000; |
| 1428 | *max_uV = 1950 * 1000; |
| 1429 | } else { |
| 1430 | *min_uV = 1900 * 1000 + tmp * 100 * 1000; |
| 1431 | *max_uV = *min_uV + 100 * 1000; |
| 1432 | } |
| 1433 | |
| 1434 | return 0; |
| 1435 | } |
| 1436 | |
| 1437 | /** |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1438 | * mmc_regulator_get_ocrmask - return mask of supported voltages |
| 1439 | * @supply: regulator to use |
| 1440 | * |
| 1441 | * This returns either a negative errno, or a mask of voltages that |
| 1442 | * can be provided to MMC/SD/SDIO devices using the specified voltage |
| 1443 | * regulator. This would normally be called before registering the |
| 1444 | * MMC host adapter. |
| 1445 | */ |
| 1446 | int mmc_regulator_get_ocrmask(struct regulator *supply) |
| 1447 | { |
| 1448 | int result = 0; |
| 1449 | int count; |
| 1450 | int i; |
Javier Martinez Canillas | 9ed7ca8 | 2014-08-14 14:39:00 +0200 | [diff] [blame] | 1451 | int vdd_uV; |
| 1452 | int vdd_mV; |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1453 | |
| 1454 | count = regulator_count_voltages(supply); |
| 1455 | if (count < 0) |
| 1456 | return count; |
| 1457 | |
| 1458 | for (i = 0; i < count; i++) { |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1459 | vdd_uV = regulator_list_voltage(supply, i); |
| 1460 | if (vdd_uV <= 0) |
| 1461 | continue; |
| 1462 | |
| 1463 | vdd_mV = vdd_uV / 1000; |
| 1464 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); |
| 1465 | } |
| 1466 | |
Javier Martinez Canillas | 9ed7ca8 | 2014-08-14 14:39:00 +0200 | [diff] [blame] | 1467 | if (!result) { |
| 1468 | vdd_uV = regulator_get_voltage(supply); |
| 1469 | if (vdd_uV <= 0) |
| 1470 | return vdd_uV; |
| 1471 | |
| 1472 | vdd_mV = vdd_uV / 1000; |
| 1473 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); |
| 1474 | } |
| 1475 | |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1476 | return result; |
| 1477 | } |
Chris Ball | 45a6b32 | 2012-06-11 09:39:12 -0400 | [diff] [blame] | 1478 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1479 | |
| 1480 | /** |
| 1481 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1482 | * @mmc: the host to regulate |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1483 | * @supply: regulator to use |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1484 | * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1485 | * |
| 1486 | * Returns zero on success, else negative errno. |
| 1487 | * |
| 1488 | * MMC host drivers may use this to enable or disable a regulator using |
| 1489 | * a particular supply voltage. This would normally be called from the |
| 1490 | * set_ios() method. |
| 1491 | */ |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1492 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
| 1493 | struct regulator *supply, |
| 1494 | unsigned short vdd_bit) |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1495 | { |
| 1496 | int result = 0; |
| 1497 | int min_uV, max_uV; |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1498 | |
| 1499 | if (vdd_bit) { |
Heiko Stuebner | 310c805 | 2015-10-12 18:00:54 +0200 | [diff] [blame] | 1500 | mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV); |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1501 | |
Tim Kryger | ca6429d | 2014-08-11 22:05:12 -0700 | [diff] [blame] | 1502 | result = regulator_set_voltage(supply, min_uV, max_uV); |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1503 | if (result == 0 && !mmc->regulator_enabled) { |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1504 | result = regulator_enable(supply); |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1505 | if (!result) |
| 1506 | mmc->regulator_enabled = true; |
| 1507 | } |
| 1508 | } else if (mmc->regulator_enabled) { |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1509 | result = regulator_disable(supply); |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1510 | if (result == 0) |
| 1511 | mmc->regulator_enabled = false; |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1512 | } |
| 1513 | |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1514 | if (result) |
| 1515 | dev_err(mmc_dev(mmc), |
| 1516 | "could not set regulator OCR (%d)\n", result); |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1517 | return result; |
| 1518 | } |
Chris Ball | 45a6b32 | 2012-06-11 09:39:12 -0400 | [diff] [blame] | 1519 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1520 | |
Douglas Anderson | 2086f80 | 2015-10-12 14:48:25 +0200 | [diff] [blame] | 1521 | static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator, |
| 1522 | int min_uV, int target_uV, |
| 1523 | int max_uV) |
| 1524 | { |
| 1525 | /* |
| 1526 | * Check if supported first to avoid errors since we may try several |
| 1527 | * signal levels during power up and don't want to show errors. |
| 1528 | */ |
| 1529 | if (!regulator_is_supported_voltage(regulator, min_uV, max_uV)) |
| 1530 | return -EINVAL; |
| 1531 | |
| 1532 | return regulator_set_voltage_triplet(regulator, min_uV, target_uV, |
| 1533 | max_uV); |
| 1534 | } |
| 1535 | |
| 1536 | /** |
| 1537 | * mmc_regulator_set_vqmmc - Set VQMMC as per the ios |
| 1538 | * |
| 1539 | * For 3.3V signaling, we try to match VQMMC to VMMC as closely as possible. |
| 1540 | * That will match the behavior of old boards where VQMMC and VMMC were supplied |
| 1541 | * by the same supply. The Bus Operating conditions for 3.3V signaling in the |
| 1542 | * SD card spec also define VQMMC in terms of VMMC. |
| 1543 | * If this is not possible we'll try the full 2.7-3.6V of the spec. |
| 1544 | * |
| 1545 | * For 1.2V and 1.8V signaling we'll try to get as close as possible to the |
| 1546 | * requested voltage. This is definitely a good idea for UHS where there's a |
| 1547 | * separate regulator on the card that's trying to make 1.8V and it's best if |
| 1548 | * we match. |
| 1549 | * |
| 1550 | * This function is expected to be used by a controller's |
| 1551 | * start_signal_voltage_switch() function. |
| 1552 | */ |
| 1553 | int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios) |
| 1554 | { |
| 1555 | struct device *dev = mmc_dev(mmc); |
| 1556 | int ret, volt, min_uV, max_uV; |
| 1557 | |
| 1558 | /* If no vqmmc supply then we can't change the voltage */ |
| 1559 | if (IS_ERR(mmc->supply.vqmmc)) |
| 1560 | return -EINVAL; |
| 1561 | |
| 1562 | switch (ios->signal_voltage) { |
| 1563 | case MMC_SIGNAL_VOLTAGE_120: |
| 1564 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, |
| 1565 | 1100000, 1200000, 1300000); |
| 1566 | case MMC_SIGNAL_VOLTAGE_180: |
| 1567 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, |
| 1568 | 1700000, 1800000, 1950000); |
| 1569 | case MMC_SIGNAL_VOLTAGE_330: |
| 1570 | ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV); |
| 1571 | if (ret < 0) |
| 1572 | return ret; |
| 1573 | |
| 1574 | dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n", |
| 1575 | __func__, volt, max_uV); |
| 1576 | |
| 1577 | min_uV = max(volt - 300000, 2700000); |
| 1578 | max_uV = min(max_uV + 200000, 3600000); |
| 1579 | |
| 1580 | /* |
| 1581 | * Due to a limitation in the current implementation of |
| 1582 | * regulator_set_voltage_triplet() which is taking the lowest |
| 1583 | * voltage possible if below the target, search for a suitable |
| 1584 | * voltage in two steps and try to stay close to vmmc |
| 1585 | * with a 0.3V tolerance at first. |
| 1586 | */ |
| 1587 | if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, |
| 1588 | min_uV, volt, max_uV)) |
| 1589 | return 0; |
| 1590 | |
| 1591 | return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc, |
| 1592 | 2700000, volt, 3600000); |
| 1593 | default: |
| 1594 | return -EINVAL; |
| 1595 | } |
| 1596 | } |
| 1597 | EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc); |
| 1598 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1599 | #endif /* CONFIG_REGULATOR */ |
| 1600 | |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1601 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
| 1602 | { |
| 1603 | struct device *dev = mmc_dev(mmc); |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1604 | int ret; |
| 1605 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1606 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
Mark Brown | bc35d5e | 2013-07-29 21:58:01 +0100 | [diff] [blame] | 1607 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1608 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1609 | if (IS_ERR(mmc->supply.vmmc)) { |
| 1610 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) |
| 1611 | return -EPROBE_DEFER; |
ludovic.desroches@atmel.com | 6e1bbc5 | 2015-11-09 15:03:59 +0100 | [diff] [blame] | 1612 | dev_dbg(dev, "No vmmc regulator found\n"); |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1613 | } else { |
| 1614 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); |
| 1615 | if (ret > 0) |
| 1616 | mmc->ocr_avail = ret; |
| 1617 | else |
| 1618 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); |
| 1619 | } |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1620 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1621 | if (IS_ERR(mmc->supply.vqmmc)) { |
| 1622 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) |
| 1623 | return -EPROBE_DEFER; |
ludovic.desroches@atmel.com | 6e1bbc5 | 2015-11-09 15:03:59 +0100 | [diff] [blame] | 1624 | dev_dbg(dev, "No vqmmc regulator found\n"); |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1625 | } |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1626 | |
| 1627 | return 0; |
| 1628 | } |
| 1629 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); |
| 1630 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1631 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | * Mask off any voltages we don't support and select |
| 1633 | * the lowest voltage |
| 1634 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1635 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | { |
| 1637 | int bit; |
| 1638 | |
Ulf Hansson | 726d6f2 | 2013-09-16 12:06:15 +0200 | [diff] [blame] | 1639 | /* |
| 1640 | * Sanity check the voltages that the card claims to |
| 1641 | * support. |
| 1642 | */ |
| 1643 | if (ocr & 0x7F) { |
| 1644 | dev_warn(mmc_dev(host), |
| 1645 | "card claims to support voltages below defined range\n"); |
| 1646 | ocr &= ~0x7F; |
| 1647 | } |
| 1648 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | ocr &= host->ocr_avail; |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1650 | if (!ocr) { |
| 1651 | dev_warn(mmc_dev(host), "no support for card's volts\n"); |
| 1652 | return 0; |
| 1653 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1655 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
| 1656 | bit = ffs(ocr) - 1; |
Timo Teras | 63ef731 | 2006-11-02 19:43:27 +0100 | [diff] [blame] | 1657 | ocr &= 3 << bit; |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1658 | mmc_power_cycle(host, ocr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | } else { |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1660 | bit = fls(ocr) - 1; |
| 1661 | ocr &= 3 << bit; |
| 1662 | if (bit != host->ios.vdd) |
| 1663 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | } |
| 1665 | |
| 1666 | return ocr; |
| 1667 | } |
| 1668 | |
Johan Rudholm | 567c890 | 2013-01-28 15:08:27 +0100 | [diff] [blame] | 1669 | int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
| 1670 | { |
| 1671 | int err = 0; |
| 1672 | int old_signal_voltage = host->ios.signal_voltage; |
| 1673 | |
| 1674 | host->ios.signal_voltage = signal_voltage; |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 1675 | if (host->ops->start_signal_voltage_switch) |
Johan Rudholm | 567c890 | 2013-01-28 15:08:27 +0100 | [diff] [blame] | 1676 | err = host->ops->start_signal_voltage_switch(host, &host->ios); |
Johan Rudholm | 567c890 | 2013-01-28 15:08:27 +0100 | [diff] [blame] | 1677 | |
| 1678 | if (err) |
| 1679 | host->ios.signal_voltage = old_signal_voltage; |
| 1680 | |
| 1681 | return err; |
| 1682 | |
| 1683 | } |
| 1684 | |
Ulf Hansson | 0f791fd | 2013-09-12 15:36:34 +0200 | [diff] [blame] | 1685 | int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr) |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1686 | { |
| 1687 | struct mmc_command cmd = {0}; |
| 1688 | int err = 0; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1689 | u32 clock; |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1690 | |
| 1691 | BUG_ON(!host); |
| 1692 | |
| 1693 | /* |
| 1694 | * Send CMD11 only if the request is to switch the card to |
| 1695 | * 1.8V signalling. |
| 1696 | */ |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1697 | if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
| 1698 | return __mmc_set_signal_voltage(host, signal_voltage); |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1699 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1700 | /* |
| 1701 | * If we cannot switch voltages, return failure so the caller |
| 1702 | * can continue without UHS mode |
| 1703 | */ |
| 1704 | if (!host->ops->start_signal_voltage_switch) |
| 1705 | return -EPERM; |
| 1706 | if (!host->ops->card_busy) |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 1707 | pr_warn("%s: cannot verify signal voltage switch\n", |
| 1708 | mmc_hostname(host)); |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1709 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1710 | cmd.opcode = SD_SWITCH_VOLTAGE; |
| 1711 | cmd.arg = 0; |
| 1712 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 1713 | |
| 1714 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 1715 | if (err) |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 1716 | return err; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1717 | |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 1718 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) |
| 1719 | return -EIO; |
| 1720 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1721 | /* |
| 1722 | * The card should drive cmd and dat[0:3] low immediately |
| 1723 | * after the response of cmd11, but wait 1 ms to be sure |
| 1724 | */ |
| 1725 | mmc_delay(1); |
| 1726 | if (host->ops->card_busy && !host->ops->card_busy(host)) { |
| 1727 | err = -EAGAIN; |
| 1728 | goto power_cycle; |
| 1729 | } |
| 1730 | /* |
| 1731 | * During a signal voltage level switch, the clock must be gated |
| 1732 | * for 5 ms according to the SD spec |
| 1733 | */ |
| 1734 | clock = host->ios.clock; |
| 1735 | host->ios.clock = 0; |
| 1736 | mmc_set_ios(host); |
| 1737 | |
| 1738 | if (__mmc_set_signal_voltage(host, signal_voltage)) { |
| 1739 | /* |
| 1740 | * Voltages may not have been switched, but we've already |
| 1741 | * sent CMD11, so a power cycle is required anyway |
| 1742 | */ |
| 1743 | err = -EAGAIN; |
| 1744 | goto power_cycle; |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1745 | } |
| 1746 | |
Doug Anderson | 7c5209c | 2015-05-12 14:46:11 -0700 | [diff] [blame] | 1747 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ |
| 1748 | mmc_delay(10); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1749 | host->ios.clock = clock; |
| 1750 | mmc_set_ios(host); |
| 1751 | |
| 1752 | /* Wait for at least 1 ms according to spec */ |
| 1753 | mmc_delay(1); |
| 1754 | |
| 1755 | /* |
| 1756 | * Failure to switch is indicated by the card holding |
| 1757 | * dat[0:3] low |
| 1758 | */ |
| 1759 | if (host->ops->card_busy && host->ops->card_busy(host)) |
| 1760 | err = -EAGAIN; |
| 1761 | |
| 1762 | power_cycle: |
| 1763 | if (err) { |
| 1764 | pr_debug("%s: Signal voltage switch failed, " |
| 1765 | "power cycling card\n", mmc_hostname(host)); |
Ulf Hansson | 0f791fd | 2013-09-12 15:36:34 +0200 | [diff] [blame] | 1766 | mmc_power_cycle(host, ocr); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1767 | } |
| 1768 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1769 | return err; |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1770 | } |
| 1771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1773 | * Select timing parameters for host. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1775 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1777 | host->ios.timing = timing; |
| 1778 | mmc_set_ios(host); |
Pierre Ossman | b57c43a | 2005-09-06 15:18:53 -0700 | [diff] [blame] | 1779 | } |
| 1780 | |
| 1781 | /* |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 1782 | * Select appropriate driver type for host. |
| 1783 | */ |
| 1784 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) |
| 1785 | { |
| 1786 | host->ios.drv_type = drv_type; |
| 1787 | mmc_set_ios(host); |
| 1788 | } |
| 1789 | |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 1790 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
| 1791 | int card_drv_type, int *drv_type) |
| 1792 | { |
| 1793 | struct mmc_host *host = card->host; |
| 1794 | int host_drv_type = SD_DRIVER_TYPE_B; |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 1795 | |
| 1796 | *drv_type = 0; |
| 1797 | |
| 1798 | if (!host->ops->select_drive_strength) |
| 1799 | return 0; |
| 1800 | |
| 1801 | /* Use SD definition of driver strength for hosts */ |
| 1802 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) |
| 1803 | host_drv_type |= SD_DRIVER_TYPE_A; |
| 1804 | |
| 1805 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) |
| 1806 | host_drv_type |= SD_DRIVER_TYPE_C; |
| 1807 | |
| 1808 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) |
| 1809 | host_drv_type |= SD_DRIVER_TYPE_D; |
| 1810 | |
| 1811 | /* |
| 1812 | * The drive strength that the hardware can support |
| 1813 | * depends on the board design. Pass the appropriate |
| 1814 | * information and let the hardware specific code |
| 1815 | * return what is possible given the options |
| 1816 | */ |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 1817 | return host->ops->select_drive_strength(card, max_dtr, |
| 1818 | host_drv_type, |
| 1819 | card_drv_type, |
| 1820 | drv_type); |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 1821 | } |
| 1822 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 1823 | /* |
Russell King | 45f8245 | 2005-12-14 14:57:35 +0000 | [diff] [blame] | 1824 | * Apply power to the MMC stack. This is a two-stage process. |
| 1825 | * First, we enable power to the card without the clock running. |
| 1826 | * We then wait a bit for the power to stabilise. Finally, |
| 1827 | * enable the bus drivers and clock to the card. |
| 1828 | * |
| 1829 | * We must _NOT_ enable the clock prior to power stablising. |
| 1830 | * |
| 1831 | * If a host does all the power sequencing itself, ignore the |
| 1832 | * initial MMC_POWER_UP stage. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | */ |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1834 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 1836 | if (host->ios.power_mode == MMC_POWER_ON) |
| 1837 | return; |
| 1838 | |
Ulf Hansson | 3aa8793 | 2014-11-28 14:38:36 +0100 | [diff] [blame] | 1839 | mmc_pwrseq_pre_power_on(host); |
| 1840 | |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1841 | host->ios.vdd = fls(ocr) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | host->ios.power_mode = MMC_POWER_UP; |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1843 | /* Set initial state and call mmc_set_ios */ |
| 1844 | mmc_set_initial_state(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | |
Tim Kryger | ceae98f | 2014-04-24 14:44:26 -0700 | [diff] [blame] | 1846 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
| 1847 | if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0) |
| 1848 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); |
| 1849 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0) |
| 1850 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); |
| 1851 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0) |
| 1852 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); |
Aaron Lu | 108ecc4 | 2012-07-10 16:55:37 +0800 | [diff] [blame] | 1853 | |
Pierre Ossman | f9996ae | 2007-09-19 18:38:50 +0200 | [diff] [blame] | 1854 | /* |
| 1855 | * This delay should be sufficient to allow the power supply |
| 1856 | * to reach the minimum voltage. |
| 1857 | */ |
José M. Fernández | 79bccc5 | 2009-03-10 02:21:21 +0100 | [diff] [blame] | 1858 | mmc_delay(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | |
Ulf Hansson | 4febb7e | 2015-02-02 16:01:14 +0100 | [diff] [blame] | 1860 | mmc_pwrseq_post_power_on(host); |
| 1861 | |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 1862 | host->ios.clock = host->f_init; |
Sascha Hauer | 8dfd037 | 2009-04-09 08:32:02 +0200 | [diff] [blame] | 1863 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | host->ios.power_mode = MMC_POWER_ON; |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1865 | mmc_set_ios(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | |
Pierre Ossman | f9996ae | 2007-09-19 18:38:50 +0200 | [diff] [blame] | 1867 | /* |
| 1868 | * This delay must be at least 74 clock sizes, or 1 ms, or the |
| 1869 | * time required to reach a stable voltage. |
| 1870 | */ |
José M. Fernández | 79bccc5 | 2009-03-10 02:21:21 +0100 | [diff] [blame] | 1871 | mmc_delay(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | } |
| 1873 | |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 1874 | void mmc_power_off(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 1876 | if (host->ios.power_mode == MMC_POWER_OFF) |
| 1877 | return; |
| 1878 | |
Ulf Hansson | 3aa8793 | 2014-11-28 14:38:36 +0100 | [diff] [blame] | 1879 | mmc_pwrseq_power_off(host); |
| 1880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | host->ios.clock = 0; |
| 1882 | host->ios.vdd = 0; |
Ulf Hansson | b33d46c | 2011-03-05 14:36:24 +0100 | [diff] [blame] | 1883 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | host->ios.power_mode = MMC_POWER_OFF; |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1885 | /* Set initial state and call mmc_set_ios */ |
| 1886 | mmc_set_initial_state(host); |
Mika Westerberg | 778e277 | 2011-08-18 15:23:48 +0300 | [diff] [blame] | 1887 | |
Daniel Drake | 041beb1 | 2011-09-07 10:22:09 +0100 | [diff] [blame] | 1888 | /* |
| 1889 | * Some configurations, such as the 802.11 SDIO card in the OLPC |
| 1890 | * XO-1.5, require a short delay after poweroff before the card |
| 1891 | * can be successfully turned on again. |
| 1892 | */ |
| 1893 | mmc_delay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | } |
| 1895 | |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1896 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
Johan Rudholm | 276e090 | 2013-01-28 15:08:25 +0100 | [diff] [blame] | 1897 | { |
| 1898 | mmc_power_off(host); |
| 1899 | /* Wait at least 1 ms according to SD spec */ |
| 1900 | mmc_delay(1); |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1901 | mmc_power_up(host, ocr); |
Johan Rudholm | 276e090 | 2013-01-28 15:08:25 +0100 | [diff] [blame] | 1902 | } |
| 1903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | /* |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 1905 | * Cleanup when the last reference to the bus operator is dropped. |
| 1906 | */ |
Adrian Bunk | 261172f | 2008-04-13 21:15:47 +0300 | [diff] [blame] | 1907 | static void __mmc_release_bus(struct mmc_host *host) |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 1908 | { |
| 1909 | BUG_ON(!host); |
| 1910 | BUG_ON(host->bus_refs); |
| 1911 | BUG_ON(!host->bus_dead); |
| 1912 | |
| 1913 | host->bus_ops = NULL; |
| 1914 | } |
| 1915 | |
| 1916 | /* |
| 1917 | * Increase reference count of bus operator |
| 1918 | */ |
| 1919 | static inline void mmc_bus_get(struct mmc_host *host) |
| 1920 | { |
| 1921 | unsigned long flags; |
| 1922 | |
| 1923 | spin_lock_irqsave(&host->lock, flags); |
| 1924 | host->bus_refs++; |
| 1925 | spin_unlock_irqrestore(&host->lock, flags); |
| 1926 | } |
| 1927 | |
| 1928 | /* |
| 1929 | * Decrease reference count of bus operator and free it if |
| 1930 | * it is the last reference. |
| 1931 | */ |
| 1932 | static inline void mmc_bus_put(struct mmc_host *host) |
| 1933 | { |
| 1934 | unsigned long flags; |
| 1935 | |
| 1936 | spin_lock_irqsave(&host->lock, flags); |
| 1937 | host->bus_refs--; |
| 1938 | if ((host->bus_refs == 0) && host->bus_ops) |
| 1939 | __mmc_release_bus(host); |
| 1940 | spin_unlock_irqrestore(&host->lock, flags); |
| 1941 | } |
| 1942 | |
| 1943 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1944 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
| 1945 | * host at any given time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1947 | void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1949 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1951 | BUG_ON(!host); |
| 1952 | BUG_ON(!ops); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1953 | |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 1954 | WARN_ON(!host->claimed); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1955 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1956 | spin_lock_irqsave(&host->lock, flags); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1957 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1958 | BUG_ON(host->bus_ops); |
| 1959 | BUG_ON(host->bus_refs); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1960 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1961 | host->bus_ops = ops; |
| 1962 | host->bus_refs = 1; |
| 1963 | host->bus_dead = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1965 | spin_unlock_irqrestore(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | } |
| 1967 | |
| 1968 | /* |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 1969 | * Remove the current bus handler from a host. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1971 | void mmc_detach_bus(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1973 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1975 | BUG_ON(!host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 1977 | WARN_ON(!host->claimed); |
| 1978 | WARN_ON(!host->bus_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1980 | spin_lock_irqsave(&host->lock, flags); |
| 1981 | |
| 1982 | host->bus_dead = 1; |
| 1983 | |
| 1984 | spin_unlock_irqrestore(&host->lock, flags); |
| 1985 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1986 | mmc_bus_put(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | } |
| 1988 | |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 1989 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
| 1990 | bool cd_irq) |
| 1991 | { |
| 1992 | #ifdef CONFIG_MMC_DEBUG |
| 1993 | unsigned long flags; |
| 1994 | spin_lock_irqsave(&host->lock, flags); |
| 1995 | WARN_ON(host->removed); |
| 1996 | spin_unlock_irqrestore(&host->lock, flags); |
| 1997 | #endif |
| 1998 | |
| 1999 | /* |
| 2000 | * If the device is configured as wakeup, we prevent a new sleep for |
| 2001 | * 5 s to give provision for user space to consume the event. |
| 2002 | */ |
| 2003 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && |
| 2004 | device_can_wakeup(mmc_dev(host))) |
| 2005 | pm_wakeup_event(mmc_dev(host), 5000); |
| 2006 | |
| 2007 | host->detect_change = 1; |
| 2008 | mmc_schedule_delayed_work(&host->detect, delay); |
| 2009 | } |
| 2010 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | /** |
| 2012 | * mmc_detect_change - process change of state on a MMC socket |
| 2013 | * @host: host which changed state. |
Richard Purdie | 8dc0033 | 2005-09-08 17:53:01 +0100 | [diff] [blame] | 2014 | * @delay: optional delay to wait before detection (jiffies) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | * |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 2016 | * MMC drivers should call this when they detect a card has been |
| 2017 | * inserted or removed. The MMC layer will confirm that any |
| 2018 | * present card is still functional, and initialize any newly |
| 2019 | * inserted. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | */ |
Richard Purdie | 8dc0033 | 2005-09-08 17:53:01 +0100 | [diff] [blame] | 2021 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | { |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 2023 | _mmc_detect_change(host, delay, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | EXPORT_SYMBOL(mmc_detect_change); |
| 2026 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2027 | void mmc_init_erase(struct mmc_card *card) |
| 2028 | { |
| 2029 | unsigned int sz; |
| 2030 | |
| 2031 | if (is_power_of_2(card->erase_size)) |
| 2032 | card->erase_shift = ffs(card->erase_size) - 1; |
| 2033 | else |
| 2034 | card->erase_shift = 0; |
| 2035 | |
| 2036 | /* |
| 2037 | * It is possible to erase an arbitrarily large area of an SD or MMC |
| 2038 | * card. That is not desirable because it can take a long time |
| 2039 | * (minutes) potentially delaying more important I/O, and also the |
| 2040 | * timeout calculations become increasingly hugely over-estimated. |
| 2041 | * Consequently, 'pref_erase' is defined as a guide to limit erases |
| 2042 | * to that size and alignment. |
| 2043 | * |
| 2044 | * For SD cards that define Allocation Unit size, limit erases to one |
Gwendal Grignou | c6d8fd6 | 2016-06-03 09:08:52 -0700 | [diff] [blame] | 2045 | * Allocation Unit at a time. |
| 2046 | * For MMC, have a stab at ai good value and for modern cards it will |
| 2047 | * end up being 4MiB. Note that if the value is too small, it can end |
| 2048 | * up taking longer to erase. Also note, erase_size is already set to |
| 2049 | * High Capacity Erase Size if available when this function is called. |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2050 | */ |
| 2051 | if (mmc_card_sd(card) && card->ssr.au) { |
| 2052 | card->pref_erase = card->ssr.au; |
| 2053 | card->erase_shift = ffs(card->ssr.au) - 1; |
Chuanxiao Dong | cc8aa7d | 2014-08-14 18:29:24 +0800 | [diff] [blame] | 2054 | } else if (card->erase_size) { |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2055 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
| 2056 | if (sz < 128) |
| 2057 | card->pref_erase = 512 * 1024 / 512; |
| 2058 | else if (sz < 512) |
| 2059 | card->pref_erase = 1024 * 1024 / 512; |
| 2060 | else if (sz < 1024) |
| 2061 | card->pref_erase = 2 * 1024 * 1024 / 512; |
| 2062 | else |
| 2063 | card->pref_erase = 4 * 1024 * 1024 / 512; |
| 2064 | if (card->pref_erase < card->erase_size) |
| 2065 | card->pref_erase = card->erase_size; |
| 2066 | else { |
| 2067 | sz = card->pref_erase % card->erase_size; |
| 2068 | if (sz) |
| 2069 | card->pref_erase += card->erase_size - sz; |
| 2070 | } |
Chuanxiao Dong | cc8aa7d | 2014-08-14 18:29:24 +0800 | [diff] [blame] | 2071 | } else |
| 2072 | card->pref_erase = 0; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2073 | } |
| 2074 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2075 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 2076 | unsigned int arg, unsigned int qty) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2077 | { |
| 2078 | unsigned int erase_timeout; |
| 2079 | |
Adrian Hunter | 7194efb | 2012-04-05 14:45:47 +0300 | [diff] [blame] | 2080 | if (arg == MMC_DISCARD_ARG || |
| 2081 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { |
| 2082 | erase_timeout = card->ext_csd.trim_timeout; |
| 2083 | } else if (card->ext_csd.erase_group_def & 1) { |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2084 | /* High Capacity Erase Group Size uses HC timeouts */ |
| 2085 | if (arg == MMC_TRIM_ARG) |
| 2086 | erase_timeout = card->ext_csd.trim_timeout; |
| 2087 | else |
| 2088 | erase_timeout = card->ext_csd.hc_erase_timeout; |
| 2089 | } else { |
| 2090 | /* CSD Erase Group Size uses write timeout */ |
| 2091 | unsigned int mult = (10 << card->csd.r2w_factor); |
| 2092 | unsigned int timeout_clks = card->csd.tacc_clks * mult; |
| 2093 | unsigned int timeout_us; |
| 2094 | |
| 2095 | /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ |
| 2096 | if (card->csd.tacc_ns < 1000000) |
| 2097 | timeout_us = (card->csd.tacc_ns * mult) / 1000; |
| 2098 | else |
| 2099 | timeout_us = (card->csd.tacc_ns / 1000) * mult; |
| 2100 | |
| 2101 | /* |
| 2102 | * ios.clock is only a target. The real clock rate might be |
| 2103 | * less but not that much less, so fudge it by multiplying by 2. |
| 2104 | */ |
| 2105 | timeout_clks <<= 1; |
| 2106 | timeout_us += (timeout_clks * 1000) / |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame] | 2107 | (card->host->ios.clock / 1000); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2108 | |
| 2109 | erase_timeout = timeout_us / 1000; |
| 2110 | |
| 2111 | /* |
| 2112 | * Theoretically, the calculation could underflow so round up |
| 2113 | * to 1ms in that case. |
| 2114 | */ |
| 2115 | if (!erase_timeout) |
| 2116 | erase_timeout = 1; |
| 2117 | } |
| 2118 | |
| 2119 | /* Multiplier for secure operations */ |
| 2120 | if (arg & MMC_SECURE_ARGS) { |
| 2121 | if (arg == MMC_SECURE_ERASE_ARG) |
| 2122 | erase_timeout *= card->ext_csd.sec_erase_mult; |
| 2123 | else |
| 2124 | erase_timeout *= card->ext_csd.sec_trim_mult; |
| 2125 | } |
| 2126 | |
| 2127 | erase_timeout *= qty; |
| 2128 | |
| 2129 | /* |
| 2130 | * Ensure at least a 1 second timeout for SPI as per |
| 2131 | * 'mmc_set_data_timeout()' |
| 2132 | */ |
| 2133 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) |
| 2134 | erase_timeout = 1000; |
| 2135 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2136 | return erase_timeout; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2137 | } |
| 2138 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2139 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
| 2140 | unsigned int arg, |
| 2141 | unsigned int qty) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2142 | { |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2143 | unsigned int erase_timeout; |
| 2144 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2145 | if (card->ssr.erase_timeout) { |
| 2146 | /* Erase timeout specified in SD Status Register (SSR) */ |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2147 | erase_timeout = card->ssr.erase_timeout * qty + |
| 2148 | card->ssr.erase_offset; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2149 | } else { |
| 2150 | /* |
| 2151 | * Erase timeout not specified in SD Status Register (SSR) so |
| 2152 | * use 250ms per write block. |
| 2153 | */ |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2154 | erase_timeout = 250 * qty; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2155 | } |
| 2156 | |
| 2157 | /* Must not be less than 1 second */ |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2158 | if (erase_timeout < 1000) |
| 2159 | erase_timeout = 1000; |
| 2160 | |
| 2161 | return erase_timeout; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2162 | } |
| 2163 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2164 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
| 2165 | unsigned int arg, |
| 2166 | unsigned int qty) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2167 | { |
| 2168 | if (mmc_card_sd(card)) |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2169 | return mmc_sd_erase_timeout(card, arg, qty); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2170 | else |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 2171 | return mmc_mmc_erase_timeout(card, arg, qty); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2172 | } |
| 2173 | |
| 2174 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, |
| 2175 | unsigned int to, unsigned int arg) |
| 2176 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 2177 | struct mmc_command cmd = {0}; |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2178 | unsigned int qty = 0, busy_timeout = 0; |
| 2179 | bool use_r1b_resp = false; |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 2180 | unsigned long timeout; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2181 | int err; |
| 2182 | |
Adrian Hunter | 8f11d10 | 2015-05-07 13:10:16 +0300 | [diff] [blame] | 2183 | mmc_retune_hold(card->host); |
| 2184 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2185 | /* |
| 2186 | * qty is used to calculate the erase timeout which depends on how many |
| 2187 | * erase groups (or allocation units in SD terminology) are affected. |
| 2188 | * We count erasing part of an erase group as one erase group. |
| 2189 | * For SD, the allocation units are always a power of 2. For MMC, the |
| 2190 | * erase group size is almost certainly also power of 2, but it does not |
| 2191 | * seem to insist on that in the JEDEC standard, so we fall back to |
| 2192 | * division in that case. SD may not specify an allocation unit size, |
| 2193 | * in which case the timeout is based on the number of write blocks. |
| 2194 | * |
| 2195 | * Note that the timeout for secure trim 2 will only be correct if the |
| 2196 | * number of erase groups specified is the same as the total of all |
| 2197 | * preceding secure trim 1 commands. Since the power may have been |
| 2198 | * lost since the secure trim 1 commands occurred, it is generally |
| 2199 | * impossible to calculate the secure trim 2 timeout correctly. |
| 2200 | */ |
| 2201 | if (card->erase_shift) |
| 2202 | qty += ((to >> card->erase_shift) - |
| 2203 | (from >> card->erase_shift)) + 1; |
| 2204 | else if (mmc_card_sd(card)) |
| 2205 | qty += to - from + 1; |
| 2206 | else |
| 2207 | qty += ((to / card->erase_size) - |
| 2208 | (from / card->erase_size)) + 1; |
| 2209 | |
| 2210 | if (!mmc_card_blockaddr(card)) { |
| 2211 | from <<= 9; |
| 2212 | to <<= 9; |
| 2213 | } |
| 2214 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2215 | if (mmc_card_sd(card)) |
| 2216 | cmd.opcode = SD_ERASE_WR_BLK_START; |
| 2217 | else |
| 2218 | cmd.opcode = MMC_ERASE_GROUP_START; |
| 2219 | cmd.arg = from; |
| 2220 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2221 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2222 | if (err) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2223 | pr_err("mmc_erase: group start error %d, " |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2224 | "status %#x\n", err, cmd.resp[0]); |
Adrian Hunter | 6771632 | 2011-08-29 16:42:15 +0300 | [diff] [blame] | 2225 | err = -EIO; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2226 | goto out; |
| 2227 | } |
| 2228 | |
| 2229 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 2230 | if (mmc_card_sd(card)) |
| 2231 | cmd.opcode = SD_ERASE_WR_BLK_END; |
| 2232 | else |
| 2233 | cmd.opcode = MMC_ERASE_GROUP_END; |
| 2234 | cmd.arg = to; |
| 2235 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2236 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2237 | if (err) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2238 | pr_err("mmc_erase: group end error %d, status %#x\n", |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2239 | err, cmd.resp[0]); |
Adrian Hunter | 6771632 | 2011-08-29 16:42:15 +0300 | [diff] [blame] | 2240 | err = -EIO; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2241 | goto out; |
| 2242 | } |
| 2243 | |
| 2244 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 2245 | cmd.opcode = MMC_ERASE; |
| 2246 | cmd.arg = arg; |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2247 | busy_timeout = mmc_erase_timeout(card, arg, qty); |
| 2248 | /* |
| 2249 | * If the host controller supports busy signalling and the timeout for |
| 2250 | * the erase operation does not exceed the max_busy_timeout, we should |
| 2251 | * use R1B response. Or we need to prevent the host from doing hw busy |
| 2252 | * detection, which is done by converting to a R1 response instead. |
| 2253 | */ |
| 2254 | if (card->host->max_busy_timeout && |
| 2255 | busy_timeout > card->host->max_busy_timeout) { |
| 2256 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2257 | } else { |
| 2258 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
| 2259 | cmd.busy_timeout = busy_timeout; |
| 2260 | use_r1b_resp = true; |
| 2261 | } |
| 2262 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2263 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2264 | if (err) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2265 | pr_err("mmc_erase: erase error %d, status %#x\n", |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2266 | err, cmd.resp[0]); |
| 2267 | err = -EIO; |
| 2268 | goto out; |
| 2269 | } |
| 2270 | |
| 2271 | if (mmc_host_is_spi(card->host)) |
| 2272 | goto out; |
| 2273 | |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2274 | /* |
| 2275 | * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling |
| 2276 | * shall be avoided. |
| 2277 | */ |
| 2278 | if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) |
| 2279 | goto out; |
| 2280 | |
| 2281 | timeout = jiffies + msecs_to_jiffies(busy_timeout); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2282 | do { |
| 2283 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 2284 | cmd.opcode = MMC_SEND_STATUS; |
| 2285 | cmd.arg = card->rca << 16; |
| 2286 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 2287 | /* Do not retry else we can't see errors */ |
| 2288 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2289 | if (err || (cmd.resp[0] & 0xFDF92000)) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2290 | pr_err("error %d requesting status %#x\n", |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2291 | err, cmd.resp[0]); |
| 2292 | err = -EIO; |
| 2293 | goto out; |
| 2294 | } |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 2295 | |
| 2296 | /* Timeout if the device never becomes ready for data and |
| 2297 | * never leaves the program state. |
| 2298 | */ |
| 2299 | if (time_after(jiffies, timeout)) { |
| 2300 | pr_err("%s: Card stuck in programming state! %s\n", |
| 2301 | mmc_hostname(card->host), __func__); |
| 2302 | err = -EIO; |
| 2303 | goto out; |
| 2304 | } |
| 2305 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2306 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 2307 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2308 | out: |
Adrian Hunter | 8f11d10 | 2015-05-07 13:10:16 +0300 | [diff] [blame] | 2309 | mmc_retune_release(card->host); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2310 | return err; |
| 2311 | } |
| 2312 | |
Baolin Wang | 7108512 | 2016-09-07 10:38:24 +0800 | [diff] [blame] | 2313 | static unsigned int mmc_align_erase_size(struct mmc_card *card, |
| 2314 | unsigned int *from, |
| 2315 | unsigned int *to, |
| 2316 | unsigned int nr) |
| 2317 | { |
| 2318 | unsigned int from_new = *from, nr_new = nr, rem; |
| 2319 | |
Baolin Wang | 6c68988 | 2016-09-07 10:38:25 +0800 | [diff] [blame] | 2320 | /* |
| 2321 | * When the 'card->erase_size' is power of 2, we can use round_up/down() |
| 2322 | * to align the erase size efficiently. |
| 2323 | */ |
| 2324 | if (is_power_of_2(card->erase_size)) { |
| 2325 | unsigned int temp = from_new; |
| 2326 | |
| 2327 | from_new = round_up(temp, card->erase_size); |
| 2328 | rem = from_new - temp; |
| 2329 | |
Baolin Wang | 7108512 | 2016-09-07 10:38:24 +0800 | [diff] [blame] | 2330 | if (nr_new > rem) |
| 2331 | nr_new -= rem; |
| 2332 | else |
| 2333 | return 0; |
Baolin Wang | 7108512 | 2016-09-07 10:38:24 +0800 | [diff] [blame] | 2334 | |
Baolin Wang | 6c68988 | 2016-09-07 10:38:25 +0800 | [diff] [blame] | 2335 | nr_new = round_down(nr_new, card->erase_size); |
| 2336 | } else { |
| 2337 | rem = from_new % card->erase_size; |
| 2338 | if (rem) { |
| 2339 | rem = card->erase_size - rem; |
| 2340 | from_new += rem; |
| 2341 | if (nr_new > rem) |
| 2342 | nr_new -= rem; |
| 2343 | else |
| 2344 | return 0; |
| 2345 | } |
| 2346 | |
| 2347 | rem = nr_new % card->erase_size; |
| 2348 | if (rem) |
| 2349 | nr_new -= rem; |
| 2350 | } |
Baolin Wang | 7108512 | 2016-09-07 10:38:24 +0800 | [diff] [blame] | 2351 | |
| 2352 | if (nr_new == 0) |
| 2353 | return 0; |
| 2354 | |
| 2355 | *to = from_new + nr_new; |
| 2356 | *from = from_new; |
| 2357 | |
| 2358 | return nr_new; |
| 2359 | } |
| 2360 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2361 | /** |
| 2362 | * mmc_erase - erase sectors. |
| 2363 | * @card: card to erase |
| 2364 | * @from: first sector to erase |
| 2365 | * @nr: number of sectors to erase |
| 2366 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) |
| 2367 | * |
| 2368 | * Caller must claim host before calling this function. |
| 2369 | */ |
| 2370 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, |
| 2371 | unsigned int arg) |
| 2372 | { |
| 2373 | unsigned int rem, to = from + nr; |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2374 | int err; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2375 | |
| 2376 | if (!(card->host->caps & MMC_CAP_ERASE) || |
| 2377 | !(card->csd.cmdclass & CCC_ERASE)) |
| 2378 | return -EOPNOTSUPP; |
| 2379 | |
| 2380 | if (!card->erase_size) |
| 2381 | return -EOPNOTSUPP; |
| 2382 | |
| 2383 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) |
| 2384 | return -EOPNOTSUPP; |
| 2385 | |
| 2386 | if ((arg & MMC_SECURE_ARGS) && |
| 2387 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) |
| 2388 | return -EOPNOTSUPP; |
| 2389 | |
| 2390 | if ((arg & MMC_TRIM_ARGS) && |
| 2391 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) |
| 2392 | return -EOPNOTSUPP; |
| 2393 | |
| 2394 | if (arg == MMC_SECURE_ERASE_ARG) { |
| 2395 | if (from % card->erase_size || nr % card->erase_size) |
| 2396 | return -EINVAL; |
| 2397 | } |
| 2398 | |
Baolin Wang | 7108512 | 2016-09-07 10:38:24 +0800 | [diff] [blame] | 2399 | if (arg == MMC_ERASE_ARG) |
| 2400 | nr = mmc_align_erase_size(card, &from, &to, nr); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2401 | |
| 2402 | if (nr == 0) |
| 2403 | return 0; |
| 2404 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2405 | if (to <= from) |
| 2406 | return -EINVAL; |
| 2407 | |
| 2408 | /* 'from' and 'to' are inclusive */ |
| 2409 | to -= 1; |
| 2410 | |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2411 | /* |
| 2412 | * Special case where only one erase-group fits in the timeout budget: |
| 2413 | * If the region crosses an erase-group boundary on this particular |
| 2414 | * case, we will be trimming more than one erase-group which, does not |
| 2415 | * fit in the timeout budget of the controller, so we need to split it |
| 2416 | * and call mmc_do_erase() twice if necessary. This special case is |
| 2417 | * identified by the card->eg_boundary flag. |
| 2418 | */ |
Robin van der Gracht | 22d7e85 | 2015-08-04 08:58:33 +0200 | [diff] [blame] | 2419 | rem = card->erase_size - (from % card->erase_size); |
| 2420 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2421 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
| 2422 | from += rem; |
| 2423 | if ((err) || (to <= from)) |
| 2424 | return err; |
| 2425 | } |
| 2426 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2427 | return mmc_do_erase(card, from, to, arg); |
| 2428 | } |
| 2429 | EXPORT_SYMBOL(mmc_erase); |
| 2430 | |
| 2431 | int mmc_can_erase(struct mmc_card *card) |
| 2432 | { |
| 2433 | if ((card->host->caps & MMC_CAP_ERASE) && |
| 2434 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) |
| 2435 | return 1; |
| 2436 | return 0; |
| 2437 | } |
| 2438 | EXPORT_SYMBOL(mmc_can_erase); |
| 2439 | |
| 2440 | int mmc_can_trim(struct mmc_card *card) |
| 2441 | { |
Shawn Lin | b5b4ff0 | 2015-08-12 13:08:32 +0800 | [diff] [blame] | 2442 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
| 2443 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2444 | return 1; |
| 2445 | return 0; |
| 2446 | } |
| 2447 | EXPORT_SYMBOL(mmc_can_trim); |
| 2448 | |
Kyungmin Park | b3bf915 | 2011-10-18 09:34:04 +0900 | [diff] [blame] | 2449 | int mmc_can_discard(struct mmc_card *card) |
| 2450 | { |
| 2451 | /* |
| 2452 | * As there's no way to detect the discard support bit at v4.5 |
| 2453 | * use the s/w feature support filed. |
| 2454 | */ |
| 2455 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) |
| 2456 | return 1; |
| 2457 | return 0; |
| 2458 | } |
| 2459 | EXPORT_SYMBOL(mmc_can_discard); |
| 2460 | |
Kyungmin Park | d9ddd62 | 2011-10-14 14:15:48 +0900 | [diff] [blame] | 2461 | int mmc_can_sanitize(struct mmc_card *card) |
| 2462 | { |
Adrian Hunter | 2830281 | 2012-04-05 14:45:48 +0300 | [diff] [blame] | 2463 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
| 2464 | return 0; |
Kyungmin Park | d9ddd62 | 2011-10-14 14:15:48 +0900 | [diff] [blame] | 2465 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
| 2466 | return 1; |
| 2467 | return 0; |
| 2468 | } |
| 2469 | EXPORT_SYMBOL(mmc_can_sanitize); |
| 2470 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2471 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
| 2472 | { |
Lukas Czerner | 5204d00 | 2014-06-18 13:18:07 +0200 | [diff] [blame] | 2473 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
| 2474 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2475 | return 1; |
| 2476 | return 0; |
| 2477 | } |
| 2478 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); |
| 2479 | |
| 2480 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, |
| 2481 | unsigned int nr) |
| 2482 | { |
| 2483 | if (!card->erase_size) |
| 2484 | return 0; |
| 2485 | if (from % card->erase_size || nr % card->erase_size) |
| 2486 | return 0; |
| 2487 | return 1; |
| 2488 | } |
| 2489 | EXPORT_SYMBOL(mmc_erase_group_aligned); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2491 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
| 2492 | unsigned int arg) |
| 2493 | { |
| 2494 | struct mmc_host *host = card->host; |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2495 | unsigned int max_discard, x, y, qty = 0, max_qty, min_qty, timeout; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2496 | unsigned int last_timeout = 0; |
Ulf Hansson | 12182af | 2016-07-27 00:04:03 +0200 | [diff] [blame] | 2497 | unsigned int max_busy_timeout = host->max_busy_timeout ? |
| 2498 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2499 | |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2500 | if (card->erase_shift) { |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2501 | max_qty = UINT_MAX >> card->erase_shift; |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2502 | min_qty = card->pref_erase >> card->erase_shift; |
| 2503 | } else if (mmc_card_sd(card)) { |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2504 | max_qty = UINT_MAX; |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2505 | min_qty = card->pref_erase; |
| 2506 | } else { |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2507 | max_qty = UINT_MAX / card->erase_size; |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2508 | min_qty = card->pref_erase / card->erase_size; |
| 2509 | } |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2510 | |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2511 | /* |
| 2512 | * We should not only use 'host->max_busy_timeout' as the limitation |
| 2513 | * when deciding the max discard sectors. We should set a balance value |
| 2514 | * to improve the erase speed, and it can not get too long timeout at |
| 2515 | * the same time. |
| 2516 | * |
| 2517 | * Here we set 'card->pref_erase' as the minimal discard sectors no |
| 2518 | * matter what size of 'host->max_busy_timeout', but if the |
| 2519 | * 'host->max_busy_timeout' is large enough for more discard sectors, |
| 2520 | * then we can continue to increase the max discard sectors until we |
Ulf Hansson | 12182af | 2016-07-27 00:04:03 +0200 | [diff] [blame] | 2521 | * get a balance value. In cases when the 'host->max_busy_timeout' |
| 2522 | * isn't specified, use the default max erase timeout. |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2523 | */ |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2524 | do { |
| 2525 | y = 0; |
| 2526 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { |
| 2527 | timeout = mmc_erase_timeout(card, arg, qty + x); |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2528 | |
Ulf Hansson | 12182af | 2016-07-27 00:04:03 +0200 | [diff] [blame] | 2529 | if (qty + x > min_qty && timeout > max_busy_timeout) |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2530 | break; |
Baolin Wang | bb4eecf | 2016-07-25 16:48:39 +0800 | [diff] [blame] | 2531 | |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2532 | if (timeout < last_timeout) |
| 2533 | break; |
| 2534 | last_timeout = timeout; |
| 2535 | y = x; |
| 2536 | } |
| 2537 | qty += y; |
| 2538 | } while (y); |
| 2539 | |
| 2540 | if (!qty) |
| 2541 | return 0; |
| 2542 | |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2543 | /* |
| 2544 | * When specifying a sector range to trim, chances are we might cross |
| 2545 | * an erase-group boundary even if the amount of sectors is less than |
| 2546 | * one erase-group. |
| 2547 | * If we can only fit one erase-group in the controller timeout budget, |
| 2548 | * we have to care that erase-group boundaries are not crossed by a |
| 2549 | * single trim operation. We flag that special case with "eg_boundary". |
| 2550 | * In all other cases we can just decrement qty and pretend that we |
| 2551 | * always touch (qty + 1) erase-groups as a simple optimization. |
| 2552 | */ |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2553 | if (qty == 1) |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2554 | card->eg_boundary = 1; |
| 2555 | else |
| 2556 | qty--; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2557 | |
| 2558 | /* Convert qty to sectors */ |
| 2559 | if (card->erase_shift) |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2560 | max_discard = qty << card->erase_shift; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2561 | else if (mmc_card_sd(card)) |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2562 | max_discard = qty + 1; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2563 | else |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2564 | max_discard = qty * card->erase_size; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2565 | |
| 2566 | return max_discard; |
| 2567 | } |
| 2568 | |
| 2569 | unsigned int mmc_calc_max_discard(struct mmc_card *card) |
| 2570 | { |
| 2571 | struct mmc_host *host = card->host; |
| 2572 | unsigned int max_discard, max_trim; |
| 2573 | |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2574 | /* |
| 2575 | * Without erase_group_def set, MMC erase timeout depends on clock |
| 2576 | * frequence which can change. In that case, the best choice is |
| 2577 | * just the preferred erase size. |
| 2578 | */ |
| 2579 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) |
| 2580 | return card->pref_erase; |
| 2581 | |
| 2582 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); |
| 2583 | if (mmc_can_trim(card)) { |
| 2584 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); |
| 2585 | if (max_trim < max_discard) |
| 2586 | max_discard = max_trim; |
| 2587 | } else if (max_discard < card->erase_size) { |
| 2588 | max_discard = 0; |
| 2589 | } |
| 2590 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", |
Ulf Hansson | 12182af | 2016-07-27 00:04:03 +0200 | [diff] [blame] | 2591 | mmc_hostname(host), max_discard, host->max_busy_timeout ? |
| 2592 | host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS); |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2593 | return max_discard; |
| 2594 | } |
| 2595 | EXPORT_SYMBOL(mmc_calc_max_discard); |
| 2596 | |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2597 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
| 2598 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 2599 | struct mmc_command cmd = {0}; |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2600 | |
Ziyuan Xu | 1712c93 | 2016-09-21 09:43:49 +0800 | [diff] [blame] | 2601 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) || |
| 2602 | mmc_card_hs400(card) || mmc_card_hs400es(card)) |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2603 | return 0; |
| 2604 | |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2605 | cmd.opcode = MMC_SET_BLOCKLEN; |
| 2606 | cmd.arg = blocklen; |
| 2607 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2608 | return mmc_wait_for_cmd(card->host, &cmd, 5); |
| 2609 | } |
| 2610 | EXPORT_SYMBOL(mmc_set_blocklen); |
| 2611 | |
Loic Pallardy | 67c79db | 2012-08-06 17:12:30 +0200 | [diff] [blame] | 2612 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
| 2613 | bool is_rel_write) |
| 2614 | { |
| 2615 | struct mmc_command cmd = {0}; |
| 2616 | |
| 2617 | cmd.opcode = MMC_SET_BLOCK_COUNT; |
| 2618 | cmd.arg = blockcount & 0x0000FFFF; |
| 2619 | if (is_rel_write) |
| 2620 | cmd.arg |= 1 << 31; |
| 2621 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2622 | return mmc_wait_for_cmd(card->host, &cmd, 5); |
| 2623 | } |
| 2624 | EXPORT_SYMBOL(mmc_set_blockcount); |
| 2625 | |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2626 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
| 2627 | { |
| 2628 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) |
| 2629 | return; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2630 | host->ops->hw_reset(host); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2631 | } |
| 2632 | |
Johan Rudholm | 83533ab | 2015-01-12 15:38:04 +0100 | [diff] [blame] | 2633 | int mmc_hw_reset(struct mmc_host *host) |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2634 | { |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2635 | int ret; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2636 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2637 | if (!host->card) |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2638 | return -EINVAL; |
| 2639 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2640 | mmc_bus_get(host); |
| 2641 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) { |
| 2642 | mmc_bus_put(host); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2643 | return -EOPNOTSUPP; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2644 | } |
| 2645 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2646 | ret = host->bus_ops->reset(host); |
| 2647 | mmc_bus_put(host); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2648 | |
Gwendal Grignou | 4e6c717 | 2016-04-01 16:04:22 -0700 | [diff] [blame] | 2649 | if (ret) |
| 2650 | pr_warn("%s: tried to reset card, got error %d\n", |
| 2651 | mmc_hostname(host), ret); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2652 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2653 | return ret; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2654 | } |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2655 | EXPORT_SYMBOL(mmc_hw_reset); |
| 2656 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2657 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
| 2658 | { |
| 2659 | host->f_init = freq; |
| 2660 | |
| 2661 | #ifdef CONFIG_MMC_DEBUG |
| 2662 | pr_info("%s: %s: trying to init card at %u Hz\n", |
| 2663 | mmc_hostname(host), __func__, host->f_init); |
| 2664 | #endif |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 2665 | mmc_power_up(host, host->ocr_avail); |
Philip Rakity | 2f94e55 | 2011-02-13 23:12:28 -0800 | [diff] [blame] | 2666 | |
| 2667 | /* |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2668 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so |
| 2669 | * do a hardware reset if possible. |
| 2670 | */ |
| 2671 | mmc_hw_reset_for_init(host); |
| 2672 | |
| 2673 | /* |
Philip Rakity | 2f94e55 | 2011-02-13 23:12:28 -0800 | [diff] [blame] | 2674 | * sdio_reset sends CMD52 to reset card. Since we do not know |
| 2675 | * if the card is being re-initialized, just send it. CMD52 |
| 2676 | * should be ignored by SD/eMMC cards. |
Carlo Caione | 100a606 | 2015-11-25 15:39:51 +0100 | [diff] [blame] | 2677 | * Skip it if we already know that we do not support SDIO commands |
Philip Rakity | 2f94e55 | 2011-02-13 23:12:28 -0800 | [diff] [blame] | 2678 | */ |
Carlo Caione | 100a606 | 2015-11-25 15:39:51 +0100 | [diff] [blame] | 2679 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
| 2680 | sdio_reset(host); |
| 2681 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2682 | mmc_go_idle(host); |
| 2683 | |
Ulf Hansson | 1b8d79c | 2016-06-21 15:12:46 +0200 | [diff] [blame] | 2684 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
| 2685 | mmc_send_if_cond(host, host->ocr_avail); |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2686 | |
| 2687 | /* Order's important: probe SDIO, then SD, then MMC */ |
Carlo Caione | 100a606 | 2015-11-25 15:39:51 +0100 | [diff] [blame] | 2688 | if (!(host->caps2 & MMC_CAP2_NO_SDIO)) |
| 2689 | if (!mmc_attach_sdio(host)) |
| 2690 | return 0; |
| 2691 | |
Ulf Hansson | 1b8d79c | 2016-06-21 15:12:46 +0200 | [diff] [blame] | 2692 | if (!(host->caps2 & MMC_CAP2_NO_SD)) |
| 2693 | if (!mmc_attach_sd(host)) |
| 2694 | return 0; |
| 2695 | |
Shawn Lin | a0c3b68 | 2016-07-01 15:45:28 +0800 | [diff] [blame] | 2696 | if (!(host->caps2 & MMC_CAP2_NO_MMC)) |
| 2697 | if (!mmc_attach_mmc(host)) |
| 2698 | return 0; |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2699 | |
| 2700 | mmc_power_off(host); |
| 2701 | return -EIO; |
| 2702 | } |
| 2703 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2704 | int _mmc_detect_card_removed(struct mmc_host *host) |
| 2705 | { |
| 2706 | int ret; |
| 2707 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2708 | if (!host->card || mmc_card_removed(host->card)) |
| 2709 | return 1; |
| 2710 | |
| 2711 | ret = host->bus_ops->alive(host); |
Kevin Liu | 1450734 | 2013-02-28 15:29:29 +0800 | [diff] [blame] | 2712 | |
| 2713 | /* |
| 2714 | * Card detect status and alive check may be out of sync if card is |
| 2715 | * removed slowly, when card detect switch changes while card/slot |
| 2716 | * pads are still contacted in hardware (refer to "SD Card Mechanical |
| 2717 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a |
| 2718 | * detect work 200ms later for this case. |
| 2719 | */ |
| 2720 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { |
| 2721 | mmc_detect_change(host, msecs_to_jiffies(200)); |
| 2722 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); |
| 2723 | } |
| 2724 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2725 | if (ret) { |
| 2726 | mmc_card_set_removed(host->card); |
| 2727 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); |
| 2728 | } |
| 2729 | |
| 2730 | return ret; |
| 2731 | } |
| 2732 | |
| 2733 | int mmc_detect_card_removed(struct mmc_host *host) |
| 2734 | { |
| 2735 | struct mmc_card *card = host->card; |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2736 | int ret; |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2737 | |
| 2738 | WARN_ON(!host->claimed); |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2739 | |
| 2740 | if (!card) |
| 2741 | return 1; |
| 2742 | |
Jaehoon Chung | 6067baf | 2016-01-29 08:52:57 +0900 | [diff] [blame] | 2743 | if (!mmc_card_is_removable(host)) |
Ulf Hansson | 1ff2575 | 2015-11-05 16:21:39 +0100 | [diff] [blame] | 2744 | return 0; |
| 2745 | |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2746 | ret = mmc_card_removed(card); |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2747 | /* |
| 2748 | * The card will be considered unchanged unless we have been asked to |
| 2749 | * detect a change or host requires polling to provide card detection. |
| 2750 | */ |
Ulf Hansson | b689167 | 2013-04-18 11:02:07 +0200 | [diff] [blame] | 2751 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2752 | return ret; |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2753 | |
| 2754 | host->detect_change = 0; |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2755 | if (!ret) { |
| 2756 | ret = _mmc_detect_card_removed(host); |
Ulf Hansson | b689167 | 2013-04-18 11:02:07 +0200 | [diff] [blame] | 2757 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2758 | /* |
| 2759 | * Schedule a detect work as soon as possible to let a |
| 2760 | * rescan handle the card removal. |
| 2761 | */ |
| 2762 | cancel_delayed_work(&host->detect); |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 2763 | _mmc_detect_change(host, 0, false); |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2764 | } |
| 2765 | } |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2766 | |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2767 | return ret; |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2768 | } |
| 2769 | EXPORT_SYMBOL(mmc_detect_card_removed); |
| 2770 | |
Pierre Ossman | b93931a | 2007-05-19 14:06:24 +0200 | [diff] [blame] | 2771 | void mmc_rescan(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2773 | struct mmc_host *host = |
| 2774 | container_of(work, struct mmc_host, detect.work); |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 2775 | int i; |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2776 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2777 | if (host->rescan_disable) |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2778 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | |
Johan Rudholm | 3339d1e | 2012-08-23 13:40:55 +0200 | [diff] [blame] | 2780 | /* If there is a non-removable card registered, only scan once */ |
Jaehoon Chung | 6067baf | 2016-01-29 08:52:57 +0900 | [diff] [blame] | 2781 | if (!mmc_card_is_removable(host) && host->rescan_entered) |
Johan Rudholm | 3339d1e | 2012-08-23 13:40:55 +0200 | [diff] [blame] | 2782 | return; |
| 2783 | host->rescan_entered = 1; |
| 2784 | |
Ulf Hansson | 8623681 | 2015-11-05 16:08:07 +0100 | [diff] [blame] | 2785 | if (host->trigger_card_event && host->ops->card_event) { |
Ulf Hansson | d234d21 | 2015-11-05 16:08:08 +0100 | [diff] [blame] | 2786 | mmc_claim_host(host); |
Ulf Hansson | 8623681 | 2015-11-05 16:08:07 +0100 | [diff] [blame] | 2787 | host->ops->card_event(host); |
Ulf Hansson | d234d21 | 2015-11-05 16:08:08 +0100 | [diff] [blame] | 2788 | mmc_release_host(host); |
Ulf Hansson | 8623681 | 2015-11-05 16:08:07 +0100 | [diff] [blame] | 2789 | host->trigger_card_event = false; |
| 2790 | } |
| 2791 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2792 | mmc_bus_get(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | |
Ohad Ben-Cohen | 30201e7 | 2010-11-28 07:21:28 +0200 | [diff] [blame] | 2794 | /* |
| 2795 | * if there is a _removable_ card registered, check whether it is |
| 2796 | * still present |
| 2797 | */ |
Jaehoon Chung | 6067baf | 2016-01-29 08:52:57 +0900 | [diff] [blame] | 2798 | if (host->bus_ops && !host->bus_dead && mmc_card_is_removable(host)) |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2799 | host->bus_ops->detect(host); |
| 2800 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2801 | host->detect_change = 0; |
| 2802 | |
Chris Ball | c584179 | 2011-01-04 12:20:22 -0500 | [diff] [blame] | 2803 | /* |
| 2804 | * Let mmc_bus_put() free the bus/bus_ops if we've found that |
| 2805 | * the card is no longer present. |
| 2806 | */ |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2807 | mmc_bus_put(host); |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2808 | mmc_bus_get(host); |
| 2809 | |
| 2810 | /* if there still is a card present, stop here */ |
| 2811 | if (host->bus_ops != NULL) { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2812 | mmc_bus_put(host); |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2813 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2814 | } |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2815 | |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2816 | /* |
| 2817 | * Only we can add a new handler, so it's safe to |
| 2818 | * release the lock here. |
| 2819 | */ |
| 2820 | mmc_bus_put(host); |
| 2821 | |
Ulf Hansson | d234d21 | 2015-11-05 16:08:08 +0100 | [diff] [blame] | 2822 | mmc_claim_host(host); |
Jaehoon Chung | 6067baf | 2016-01-29 08:52:57 +0900 | [diff] [blame] | 2823 | if (mmc_card_is_removable(host) && host->ops->get_cd && |
Sascha Hauer | c1b55bf | 2013-12-05 14:34:46 +0100 | [diff] [blame] | 2824 | host->ops->get_cd(host) == 0) { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 2825 | mmc_power_off(host); |
| 2826 | mmc_release_host(host); |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2827 | goto out; |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 2828 | } |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2829 | |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 2830 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2831 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
| 2832 | break; |
Jaehoon Chung | 06b2233 | 2011-05-12 17:18:59 +0900 | [diff] [blame] | 2833 | if (freqs[i] <= host->f_min) |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2834 | break; |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 2835 | } |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2836 | mmc_release_host(host); |
| 2837 | |
| 2838 | out: |
Anton Vorontsov | 28f5248 | 2008-06-17 18:17:15 +0400 | [diff] [blame] | 2839 | if (host->caps & MMC_CAP_NEEDS_POLL) |
| 2840 | mmc_schedule_delayed_work(&host->detect, HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | } |
| 2842 | |
Pierre Ossman | b93931a | 2007-05-19 14:06:24 +0200 | [diff] [blame] | 2843 | void mmc_start_host(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2844 | { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 2845 | host->f_init = max(freqs[0], host->f_min); |
Guennadi Liakhovetski | d9adcc1 | 2012-06-14 10:17:39 +0200 | [diff] [blame] | 2846 | host->rescan_disable = 0; |
Roger Tseng | 8af465d | 2014-09-24 17:07:13 +0800 | [diff] [blame] | 2847 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2848 | |
| 2849 | mmc_claim_host(host); |
Adrian Hunter | a08b17b | 2013-04-15 11:27:25 -0400 | [diff] [blame] | 2850 | if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP) |
| 2851 | mmc_power_off(host); |
| 2852 | else |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 2853 | mmc_power_up(host, host->ocr_avail); |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2854 | mmc_release_host(host); |
| 2855 | |
Adrian Hunter | 740a221 | 2014-03-10 15:02:41 +0200 | [diff] [blame] | 2856 | mmc_gpiod_request_cd_irq(host); |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 2857 | _mmc_detect_change(host, 0, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | } |
| 2859 | |
Pierre Ossman | b93931a | 2007-05-19 14:06:24 +0200 | [diff] [blame] | 2860 | void mmc_stop_host(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | { |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2862 | #ifdef CONFIG_MMC_DEBUG |
Pierre Ossman | 1efd48b | 2007-05-08 22:35:17 +0200 | [diff] [blame] | 2863 | unsigned long flags; |
| 2864 | spin_lock_irqsave(&host->lock, flags); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2865 | host->removed = 1; |
Pierre Ossman | 1efd48b | 2007-05-08 22:35:17 +0200 | [diff] [blame] | 2866 | spin_unlock_irqrestore(&host->lock, flags); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2867 | #endif |
Adrian Hunter | 740a221 | 2014-03-10 15:02:41 +0200 | [diff] [blame] | 2868 | if (host->slot.cd_irq >= 0) |
| 2869 | disable_irq(host->slot.cd_irq); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2870 | |
Guennadi Liakhovetski | d9adcc1 | 2012-06-14 10:17:39 +0200 | [diff] [blame] | 2871 | host->rescan_disable = 1; |
Guennadi Liakhovetski | d9bcbf3 | 2010-11-11 17:32:25 +0100 | [diff] [blame] | 2872 | cancel_delayed_work_sync(&host->detect); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2873 | |
Nicolas Pitre | da68c4e | 2010-03-05 13:43:31 -0800 | [diff] [blame] | 2874 | /* clear pm flags now and let card drivers set them as needed */ |
| 2875 | host->pm_flags = 0; |
| 2876 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2877 | mmc_bus_get(host); |
| 2878 | if (host->bus_ops && !host->bus_dead) { |
Guennadi Liakhovetski | 0db13fc | 2012-01-04 15:28:45 +0100 | [diff] [blame] | 2879 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
Ulf Hansson | 58a8a4a | 2013-06-10 17:03:36 +0200 | [diff] [blame] | 2880 | host->bus_ops->remove(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2881 | mmc_claim_host(host); |
| 2882 | mmc_detach_bus(host); |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 2883 | mmc_power_off(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2884 | mmc_release_host(host); |
Denis Karpov | 53509f0 | 2009-09-22 16:44:36 -0700 | [diff] [blame] | 2885 | mmc_bus_put(host); |
| 2886 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | } |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2888 | mmc_bus_put(host); |
| 2889 | |
| 2890 | BUG_ON(host->card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2891 | |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2892 | mmc_claim_host(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | mmc_power_off(host); |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2894 | mmc_release_host(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2895 | } |
| 2896 | |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2897 | int mmc_power_save_host(struct mmc_host *host) |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2898 | { |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2899 | int ret = 0; |
| 2900 | |
Daniel Drake | bb9cab9 | 2011-07-17 16:38:41 +0100 | [diff] [blame] | 2901 | #ifdef CONFIG_MMC_DEBUG |
| 2902 | pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); |
| 2903 | #endif |
| 2904 | |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2905 | mmc_bus_get(host); |
| 2906 | |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2907 | if (!host->bus_ops || host->bus_dead) { |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2908 | mmc_bus_put(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2909 | return -EINVAL; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2910 | } |
| 2911 | |
| 2912 | if (host->bus_ops->power_save) |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2913 | ret = host->bus_ops->power_save(host); |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2914 | |
| 2915 | mmc_bus_put(host); |
| 2916 | |
| 2917 | mmc_power_off(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2918 | |
| 2919 | return ret; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2920 | } |
| 2921 | EXPORT_SYMBOL(mmc_power_save_host); |
| 2922 | |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2923 | int mmc_power_restore_host(struct mmc_host *host) |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2924 | { |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2925 | int ret; |
| 2926 | |
Daniel Drake | bb9cab9 | 2011-07-17 16:38:41 +0100 | [diff] [blame] | 2927 | #ifdef CONFIG_MMC_DEBUG |
| 2928 | pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); |
| 2929 | #endif |
| 2930 | |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2931 | mmc_bus_get(host); |
| 2932 | |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2933 | if (!host->bus_ops || host->bus_dead) { |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2934 | mmc_bus_put(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2935 | return -EINVAL; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2936 | } |
| 2937 | |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 2938 | mmc_power_up(host, host->card->ocr); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2939 | ret = host->bus_ops->power_restore(host); |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2940 | |
| 2941 | mmc_bus_put(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2942 | |
| 2943 | return ret; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2944 | } |
| 2945 | EXPORT_SYMBOL(mmc_power_restore_host); |
| 2946 | |
Seungwon Jeon | 881d1c2 | 2011-10-14 14:03:21 +0900 | [diff] [blame] | 2947 | /* |
| 2948 | * Flush the cache to the non-volatile storage. |
| 2949 | */ |
| 2950 | int mmc_flush_cache(struct mmc_card *card) |
| 2951 | { |
Seungwon Jeon | 881d1c2 | 2011-10-14 14:03:21 +0900 | [diff] [blame] | 2952 | int err = 0; |
| 2953 | |
Seungwon Jeon | 881d1c2 | 2011-10-14 14:03:21 +0900 | [diff] [blame] | 2954 | if (mmc_card_mmc(card) && |
| 2955 | (card->ext_csd.cache_size > 0) && |
| 2956 | (card->ext_csd.cache_ctrl & 1)) { |
| 2957 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| 2958 | EXT_CSD_FLUSH_CACHE, 1, 0); |
| 2959 | if (err) |
| 2960 | pr_err("%s: cache flush error %d\n", |
| 2961 | mmc_hostname(card->host), err); |
| 2962 | } |
| 2963 | |
| 2964 | return err; |
| 2965 | } |
| 2966 | EXPORT_SYMBOL(mmc_flush_cache); |
| 2967 | |
Ulf Hansson | 8dede18 | 2015-11-05 16:11:12 +0100 | [diff] [blame] | 2968 | #ifdef CONFIG_PM_SLEEP |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2969 | /* Do the card removal on suspend if card is assumed removeable |
| 2970 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able |
| 2971 | to sync the card. |
| 2972 | */ |
Ulf Hansson | 8dede18 | 2015-11-05 16:11:12 +0100 | [diff] [blame] | 2973 | static int mmc_pm_notify(struct notifier_block *notify_block, |
| 2974 | unsigned long mode, void *unused) |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2975 | { |
| 2976 | struct mmc_host *host = container_of( |
| 2977 | notify_block, struct mmc_host, pm_notify); |
| 2978 | unsigned long flags; |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 2979 | int err = 0; |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2980 | |
| 2981 | switch (mode) { |
| 2982 | case PM_HIBERNATION_PREPARE: |
| 2983 | case PM_SUSPEND_PREPARE: |
Grygorii Strashko | 184af16 | 2015-04-23 13:43:43 +0300 | [diff] [blame] | 2984 | case PM_RESTORE_PREPARE: |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2985 | spin_lock_irqsave(&host->lock, flags); |
| 2986 | host->rescan_disable = 1; |
| 2987 | spin_unlock_irqrestore(&host->lock, flags); |
| 2988 | cancel_delayed_work_sync(&host->detect); |
| 2989 | |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 2990 | if (!host->bus_ops) |
| 2991 | break; |
| 2992 | |
| 2993 | /* Validate prerequisites for suspend */ |
| 2994 | if (host->bus_ops->pre_suspend) |
| 2995 | err = host->bus_ops->pre_suspend(host); |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2996 | if (!err) |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2997 | break; |
| 2998 | |
Daniel Drake | 963f312 | 2017-12-12 10:49:02 +0000 | [diff] [blame] | 2999 | if (!mmc_card_is_removable(host)) { |
| 3000 | dev_warn(mmc_dev(host), |
| 3001 | "pre_suspend failed for non-removable host: " |
| 3002 | "%d\n", err); |
| 3003 | /* Avoid removing non-removable hosts */ |
| 3004 | break; |
| 3005 | } |
| 3006 | |
Guennadi Liakhovetski | 0db13fc | 2012-01-04 15:28:45 +0100 | [diff] [blame] | 3007 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
Ulf Hansson | 58a8a4a | 2013-06-10 17:03:36 +0200 | [diff] [blame] | 3008 | host->bus_ops->remove(host); |
Guennadi Liakhovetski | 0db13fc | 2012-01-04 15:28:45 +0100 | [diff] [blame] | 3009 | mmc_claim_host(host); |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 3010 | mmc_detach_bus(host); |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 3011 | mmc_power_off(host); |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 3012 | mmc_release_host(host); |
| 3013 | host->pm_flags = 0; |
| 3014 | break; |
| 3015 | |
| 3016 | case PM_POST_SUSPEND: |
| 3017 | case PM_POST_HIBERNATION: |
Takashi Iwai | 274476f | 2010-12-10 08:40:31 +0100 | [diff] [blame] | 3018 | case PM_POST_RESTORE: |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 3019 | |
| 3020 | spin_lock_irqsave(&host->lock, flags); |
| 3021 | host->rescan_disable = 0; |
| 3022 | spin_unlock_irqrestore(&host->lock, flags); |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 3023 | _mmc_detect_change(host, 0, false); |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 3024 | |
| 3025 | } |
| 3026 | |
| 3027 | return 0; |
| 3028 | } |
Ulf Hansson | 8dede18 | 2015-11-05 16:11:12 +0100 | [diff] [blame] | 3029 | |
| 3030 | void mmc_register_pm_notifier(struct mmc_host *host) |
| 3031 | { |
| 3032 | host->pm_notify.notifier_call = mmc_pm_notify; |
| 3033 | register_pm_notifier(&host->pm_notify); |
| 3034 | } |
| 3035 | |
| 3036 | void mmc_unregister_pm_notifier(struct mmc_host *host) |
| 3037 | { |
| 3038 | unregister_pm_notifier(&host->pm_notify); |
| 3039 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3040 | #endif |
| 3041 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 3042 | /** |
| 3043 | * mmc_init_context_info() - init synchronization context |
| 3044 | * @host: mmc host |
| 3045 | * |
| 3046 | * Init struct context_info needed to implement asynchronous |
| 3047 | * request mechanism, used by mmc core, host driver and mmc requests |
| 3048 | * supplier. |
| 3049 | */ |
| 3050 | void mmc_init_context_info(struct mmc_host *host) |
| 3051 | { |
| 3052 | spin_lock_init(&host->context_info.lock); |
| 3053 | host->context_info.is_new_req = false; |
| 3054 | host->context_info.is_done_rcv = false; |
| 3055 | host->context_info.is_waiting_last_req = false; |
| 3056 | init_waitqueue_head(&host->context_info.wait); |
| 3057 | } |
| 3058 | |
San Mehat | 2b6be3a | 2008-04-14 15:22:49 -0700 | [diff] [blame] | 3059 | #ifdef CONFIG_MMC_EMBEDDED_SDIO |
| 3060 | void mmc_set_embedded_sdio_data(struct mmc_host *host, |
| 3061 | struct sdio_cis *cis, |
| 3062 | struct sdio_cccr *cccr, |
| 3063 | struct sdio_embedded_func *funcs, |
| 3064 | int num_funcs) |
| 3065 | { |
| 3066 | host->embedded_sdio_data.cis = cis; |
| 3067 | host->embedded_sdio_data.cccr = cccr; |
| 3068 | host->embedded_sdio_data.funcs = funcs; |
| 3069 | host->embedded_sdio_data.num_funcs = num_funcs; |
| 3070 | } |
| 3071 | |
| 3072 | EXPORT_SYMBOL(mmc_set_embedded_sdio_data); |
| 3073 | #endif |
| 3074 | |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 3075 | static int __init mmc_init(void) |
| 3076 | { |
| 3077 | int ret; |
| 3078 | |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 3079 | ret = mmc_register_bus(); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 3080 | if (ret) |
Ulf Hansson | 520bd7a | 2015-12-01 10:35:29 +0100 | [diff] [blame] | 3081 | return ret; |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 3082 | |
| 3083 | ret = mmc_register_host_class(); |
| 3084 | if (ret) |
| 3085 | goto unregister_bus; |
| 3086 | |
| 3087 | ret = sdio_register_bus(); |
| 3088 | if (ret) |
| 3089 | goto unregister_host_class; |
| 3090 | |
| 3091 | return 0; |
| 3092 | |
| 3093 | unregister_host_class: |
| 3094 | mmc_unregister_host_class(); |
| 3095 | unregister_bus: |
| 3096 | mmc_unregister_bus(); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 3097 | return ret; |
| 3098 | } |
| 3099 | |
| 3100 | static void __exit mmc_exit(void) |
| 3101 | { |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 3102 | sdio_unregister_bus(); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 3103 | mmc_unregister_host_class(); |
| 3104 | mmc_unregister_bus(); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 3105 | } |
| 3106 | |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 3107 | #ifdef CONFIG_BLOCK |
| 3108 | static ssize_t |
| 3109 | latency_hist_show(struct device *dev, struct device_attribute *attr, char *buf) |
| 3110 | { |
| 3111 | struct mmc_host *host = cls_dev_to_mmc_host(dev); |
Hyojun Kim | 11537d5 | 2017-12-21 09:57:41 -0800 | [diff] [blame] | 3112 | size_t written_bytes; |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 3113 | |
Hyojun Kim | 11537d5 | 2017-12-21 09:57:41 -0800 | [diff] [blame] | 3114 | written_bytes = blk_latency_hist_show("Read", &host->io_lat_read, |
| 3115 | buf, PAGE_SIZE); |
| 3116 | written_bytes += blk_latency_hist_show("Write", &host->io_lat_write, |
| 3117 | buf + written_bytes, PAGE_SIZE - written_bytes); |
| 3118 | |
| 3119 | return written_bytes; |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 3120 | } |
| 3121 | |
| 3122 | /* |
| 3123 | * Values permitted 0, 1, 2. |
| 3124 | * 0 -> Disable IO latency histograms (default) |
| 3125 | * 1 -> Enable IO latency histograms |
| 3126 | * 2 -> Zero out IO latency histograms |
| 3127 | */ |
| 3128 | static ssize_t |
| 3129 | latency_hist_store(struct device *dev, struct device_attribute *attr, |
| 3130 | const char *buf, size_t count) |
| 3131 | { |
| 3132 | struct mmc_host *host = cls_dev_to_mmc_host(dev); |
| 3133 | long value; |
| 3134 | |
| 3135 | if (kstrtol(buf, 0, &value)) |
| 3136 | return -EINVAL; |
Hyojun Kim | 11537d5 | 2017-12-21 09:57:41 -0800 | [diff] [blame] | 3137 | if (value == BLK_IO_LAT_HIST_ZERO) { |
| 3138 | memset(&host->io_lat_read, 0, sizeof(host->io_lat_read)); |
| 3139 | memset(&host->io_lat_write, 0, sizeof(host->io_lat_write)); |
| 3140 | } else if (value == BLK_IO_LAT_HIST_ENABLE || |
Mohan Srinivasan | e2d8878 | 2016-12-14 15:55:36 -0800 | [diff] [blame] | 3141 | value == BLK_IO_LAT_HIST_DISABLE) |
| 3142 | host->latency_hist_enabled = value; |
| 3143 | return count; |
| 3144 | } |
| 3145 | |
| 3146 | static DEVICE_ATTR(latency_hist, S_IRUGO | S_IWUSR, |
| 3147 | latency_hist_show, latency_hist_store); |
| 3148 | |
| 3149 | void |
| 3150 | mmc_latency_hist_sysfs_init(struct mmc_host *host) |
| 3151 | { |
| 3152 | if (device_create_file(&host->class_dev, &dev_attr_latency_hist)) |
| 3153 | dev_err(&host->class_dev, |
| 3154 | "Failed to create latency_hist sysfs entry\n"); |
| 3155 | } |
| 3156 | |
| 3157 | void |
| 3158 | mmc_latency_hist_sysfs_exit(struct mmc_host *host) |
| 3159 | { |
| 3160 | device_remove_file(&host->class_dev, &dev_attr_latency_hist); |
| 3161 | } |
| 3162 | #endif |
| 3163 | |
Nicolas Pitre | 2607496 | 2007-06-16 02:07:53 -0400 | [diff] [blame] | 3164 | subsys_initcall(mmc_init); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 3165 | module_exit(mmc_exit); |
| 3166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3167 | MODULE_LICENSE("GPL"); |