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 | |
Pierre Ossman | aaac1b4 | 2007-02-28 15:33:10 +0100 | [diff] [blame] | 39 | #include "core.h" |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 40 | #include "bus.h" |
| 41 | #include "host.h" |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 42 | #include "sdio_bus.h" |
Ulf Hansson | 3aa8793 | 2014-11-28 14:38:36 +0100 | [diff] [blame] | 43 | #include "pwrseq.h" |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 44 | |
| 45 | #include "mmc_ops.h" |
| 46 | #include "sd_ops.h" |
Pierre Ossman | 5c4e6f1 | 2007-05-21 20:23:20 +0200 | [diff] [blame] | 47 | #include "sdio_ops.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 49 | /* If the device is not responding */ |
| 50 | #define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ |
| 51 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 52 | /* |
| 53 | * Background operations can take a long time, depending on the housekeeping |
| 54 | * operations the card has to perform. |
| 55 | */ |
| 56 | #define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ |
| 57 | |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 58 | static struct workqueue_struct *workqueue; |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 59 | static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 60 | |
| 61 | /* |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 62 | * Enabling software CRCs on the data blocks can be a significant (30%) |
| 63 | * performance cost, and for other reasons may not always be desired. |
| 64 | * So we allow it it to be disabled. |
| 65 | */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 66 | bool use_spi_crc = 1; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 67 | module_param(use_spi_crc, bool, 0); |
| 68 | |
| 69 | /* |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 70 | * Internal function. Schedule delayed work in the MMC work queue. |
| 71 | */ |
| 72 | static int mmc_schedule_delayed_work(struct delayed_work *work, |
| 73 | unsigned long delay) |
| 74 | { |
| 75 | return queue_delayed_work(workqueue, work, delay); |
| 76 | } |
| 77 | |
| 78 | /* |
| 79 | * Internal function. Flush all scheduled work from the MMC work queue. |
| 80 | */ |
| 81 | static void mmc_flush_scheduled_work(void) |
| 82 | { |
| 83 | flush_workqueue(workqueue); |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | /** |
Russell King | fe10c6a | 2006-05-04 13:51:45 +0100 | [diff] [blame] | 124 | * mmc_request_done - finish processing an MMC request |
| 125 | * @host: MMC host which completed request |
| 126 | * @mrq: MMC request which request |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | * |
| 128 | * MMC drivers should call this function when they have completed |
Russell King | fe10c6a | 2006-05-04 13:51:45 +0100 | [diff] [blame] | 129 | * their processing of a request. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | */ |
| 131 | void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) |
| 132 | { |
| 133 | struct mmc_command *cmd = mrq->cmd; |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 134 | int err = cmd->error; |
| 135 | |
Adrian Hunter | bd11e8b | 2015-05-07 13:10:22 +0300 | [diff] [blame] | 136 | /* Flag re-tuning needed on CRC errors */ |
Chaotian Jing | 031277d | 2015-09-30 17:37:18 +0800 | [diff] [blame] | 137 | if ((cmd->opcode != MMC_SEND_TUNING_BLOCK && |
| 138 | cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) && |
| 139 | (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || |
Adrian Hunter | bd11e8b | 2015-05-07 13:10:22 +0300 | [diff] [blame] | 140 | (mrq->data && mrq->data->error == -EILSEQ) || |
Chaotian Jing | 031277d | 2015-09-30 17:37:18 +0800 | [diff] [blame] | 141 | (mrq->stop && mrq->stop->error == -EILSEQ))) |
Adrian Hunter | bd11e8b | 2015-05-07 13:10:22 +0300 | [diff] [blame] | 142 | mmc_retune_needed(host); |
| 143 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 144 | if (err && cmd->retries && mmc_host_is_spi(host)) { |
| 145 | if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) |
| 146 | cmd->retries = 0; |
| 147 | } |
| 148 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 149 | if (err && cmd->retries && !mmc_card_removed(host->card)) { |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 150 | /* |
| 151 | * Request starter must handle retries - see |
| 152 | * mmc_wait_for_req_done(). |
| 153 | */ |
| 154 | if (mrq->done) |
| 155 | mrq->done(mrq); |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 156 | } else { |
Per Forlin | 1b676f7 | 2011-08-19 14:52:37 +0200 | [diff] [blame] | 157 | mmc_should_fail_request(host, mrq); |
| 158 | |
Pierre Ossman | af8350c | 2007-09-24 07:15:48 +0200 | [diff] [blame] | 159 | led_trigger_event(host->led, LED_OFF); |
| 160 | |
Andrew Gabbasov | fc75b70 | 2014-10-01 07:14:10 -0500 | [diff] [blame] | 161 | if (mrq->sbc) { |
| 162 | pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", |
| 163 | mmc_hostname(host), mrq->sbc->opcode, |
| 164 | mrq->sbc->error, |
| 165 | mrq->sbc->resp[0], mrq->sbc->resp[1], |
| 166 | mrq->sbc->resp[2], mrq->sbc->resp[3]); |
| 167 | } |
| 168 | |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 169 | pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", |
| 170 | mmc_hostname(host), cmd->opcode, err, |
| 171 | cmd->resp[0], cmd->resp[1], |
| 172 | cmd->resp[2], cmd->resp[3]); |
| 173 | |
| 174 | if (mrq->data) { |
| 175 | pr_debug("%s: %d bytes transferred: %d\n", |
| 176 | mmc_hostname(host), |
| 177 | mrq->data->bytes_xfered, mrq->data->error); |
| 178 | } |
| 179 | |
| 180 | if (mrq->stop) { |
| 181 | pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n", |
| 182 | mmc_hostname(host), mrq->stop->opcode, |
| 183 | mrq->stop->error, |
| 184 | mrq->stop->resp[0], mrq->stop->resp[1], |
| 185 | mrq->stop->resp[2], mrq->stop->resp[3]); |
| 186 | } |
| 187 | |
| 188 | if (mrq->done) |
| 189 | mrq->done(mrq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | } |
| 192 | |
| 193 | EXPORT_SYMBOL(mmc_request_done); |
| 194 | |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 195 | static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) |
| 196 | { |
| 197 | int err; |
| 198 | |
| 199 | /* Assumes host controller has been runtime resumed by mmc_claim_host */ |
| 200 | err = mmc_retune(host); |
| 201 | if (err) { |
| 202 | mrq->cmd->error = err; |
| 203 | mmc_request_done(host, mrq); |
| 204 | return; |
| 205 | } |
| 206 | |
Hans de Goede | 5d3f6ef | 2015-09-22 17:30:25 +0200 | [diff] [blame] | 207 | /* |
| 208 | * For sdio rw commands we must wait for card busy otherwise some |
| 209 | * sdio devices won't work properly. |
| 210 | */ |
| 211 | if (mmc_is_io_op(mrq->cmd->opcode) && host->ops->card_busy) { |
| 212 | int tries = 500; /* Wait aprox 500ms at maximum */ |
| 213 | |
| 214 | while (host->ops->card_busy(host) && --tries) |
| 215 | mmc_delay(1); |
| 216 | |
| 217 | if (tries == 0) { |
| 218 | mrq->cmd->error = -EBUSY; |
| 219 | mmc_request_done(host, mrq); |
| 220 | return; |
| 221 | } |
| 222 | } |
| 223 | |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 224 | host->ops->request(host, mrq); |
| 225 | } |
| 226 | |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 227 | 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] | 228 | { |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 229 | #ifdef CONFIG_MMC_DEBUG |
| 230 | unsigned int i, sz; |
Pierre Ossman | a84756c | 2008-07-29 01:09:37 +0200 | [diff] [blame] | 231 | struct scatterlist *sg; |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 232 | #endif |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 233 | mmc_retune_hold(host); |
| 234 | |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 235 | if (mmc_card_removed(host->card)) |
| 236 | return -ENOMEDIUM; |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 237 | |
Jaehoon Chung | 7b2fd4f | 2012-02-07 14:13:10 +0900 | [diff] [blame] | 238 | if (mrq->sbc) { |
| 239 | pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", |
| 240 | mmc_hostname(host), mrq->sbc->opcode, |
| 241 | mrq->sbc->arg, mrq->sbc->flags); |
| 242 | } |
| 243 | |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 244 | pr_debug("%s: starting CMD%u arg %08x flags %08x\n", |
| 245 | mmc_hostname(host), mrq->cmd->opcode, |
| 246 | mrq->cmd->arg, mrq->cmd->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 248 | if (mrq->data) { |
| 249 | pr_debug("%s: blksz %d blocks %d flags %08x " |
| 250 | "tsac %d ms nsac %d\n", |
| 251 | mmc_hostname(host), mrq->data->blksz, |
| 252 | mrq->data->blocks, mrq->data->flags, |
Pierre Ossman | ce252ed | 2007-08-07 14:06:18 +0200 | [diff] [blame] | 253 | mrq->data->timeout_ns / 1000000, |
Pierre Ossman | e4d2170 | 2007-07-24 21:46:49 +0200 | [diff] [blame] | 254 | mrq->data->timeout_clks); |
| 255 | } |
| 256 | |
| 257 | if (mrq->stop) { |
| 258 | pr_debug("%s: CMD%u arg %08x flags %08x\n", |
| 259 | mmc_hostname(host), mrq->stop->opcode, |
| 260 | mrq->stop->arg, mrq->stop->flags); |
| 261 | } |
| 262 | |
Pierre Ossman | f22ee4e | 2006-12-26 15:11:23 +0100 | [diff] [blame] | 263 | WARN_ON(!host->claimed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | mrq->cmd->error = 0; |
| 266 | mrq->cmd->mrq = mrq; |
Andrew Gabbasov | cce411e | 2014-10-01 07:14:09 -0500 | [diff] [blame] | 267 | if (mrq->sbc) { |
| 268 | mrq->sbc->error = 0; |
| 269 | mrq->sbc->mrq = mrq; |
| 270 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | if (mrq->data) { |
Pierre Ossman | fe4a3c7 | 2006-11-21 17:54:23 +0100 | [diff] [blame] | 272 | BUG_ON(mrq->data->blksz > host->max_blk_size); |
Pierre Ossman | 55db890 | 2006-11-21 17:55:45 +0100 | [diff] [blame] | 273 | BUG_ON(mrq->data->blocks > host->max_blk_count); |
| 274 | BUG_ON(mrq->data->blocks * mrq->data->blksz > |
| 275 | host->max_req_size); |
Pierre Ossman | fe4a3c7 | 2006-11-21 17:54:23 +0100 | [diff] [blame] | 276 | |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 277 | #ifdef CONFIG_MMC_DEBUG |
| 278 | sz = 0; |
Pierre Ossman | a84756c | 2008-07-29 01:09:37 +0200 | [diff] [blame] | 279 | for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) |
| 280 | sz += sg->length; |
Pierre Ossman | 976d927 | 2007-04-13 22:47:01 +0200 | [diff] [blame] | 281 | BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); |
| 282 | #endif |
| 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | mrq->cmd->data = mrq->data; |
| 285 | mrq->data->error = 0; |
| 286 | mrq->data->mrq = mrq; |
| 287 | if (mrq->stop) { |
| 288 | mrq->data->stop = mrq->stop; |
| 289 | mrq->stop->error = 0; |
| 290 | mrq->stop->mrq = mrq; |
| 291 | } |
| 292 | } |
Pierre Tardy | 66c036e | 2011-02-06 19:02:48 +0100 | [diff] [blame] | 293 | led_trigger_event(host->led, LED_FULL); |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 294 | __mmc_start_request(host, mrq); |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 295 | |
| 296 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 299 | /** |
| 300 | * mmc_start_bkops - start BKOPS for supported cards |
| 301 | * @card: MMC card to start BKOPS |
| 302 | * @form_exception: A flag to indicate if this function was |
| 303 | * called due to an exception raised by the card |
| 304 | * |
| 305 | * Start background operations whenever requested. |
| 306 | * When the urgent BKOPS bit is set in a R1 command response |
| 307 | * then background operations should be started immediately. |
| 308 | */ |
| 309 | void mmc_start_bkops(struct mmc_card *card, bool from_exception) |
| 310 | { |
| 311 | int err; |
| 312 | int timeout; |
| 313 | bool use_busy_signal; |
| 314 | |
| 315 | BUG_ON(!card); |
| 316 | |
Alexey Skidanov | 0501be6 | 2015-01-29 10:49:43 +0200 | [diff] [blame] | 317 | if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card)) |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 318 | return; |
| 319 | |
| 320 | err = mmc_read_bkops_status(card); |
| 321 | if (err) { |
| 322 | pr_err("%s: Failed to read bkops status: %d\n", |
| 323 | mmc_hostname(card->host), err); |
| 324 | return; |
| 325 | } |
| 326 | |
| 327 | if (!card->ext_csd.raw_bkops_status) |
| 328 | return; |
| 329 | |
| 330 | if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && |
| 331 | from_exception) |
| 332 | return; |
| 333 | |
| 334 | mmc_claim_host(card->host); |
| 335 | if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { |
| 336 | timeout = MMC_BKOPS_MAX_TIMEOUT; |
| 337 | use_busy_signal = true; |
| 338 | } else { |
| 339 | timeout = 0; |
| 340 | use_busy_signal = false; |
| 341 | } |
| 342 | |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 343 | mmc_retune_hold(card->host); |
| 344 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 345 | err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 346 | EXT_CSD_BKOPS_START, 1, timeout, |
| 347 | use_busy_signal, true, false); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 348 | if (err) { |
| 349 | pr_warn("%s: Error %d starting bkops\n", |
| 350 | mmc_hostname(card->host), err); |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 351 | mmc_retune_release(card->host); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 352 | goto out; |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | * For urgent bkops status (LEVEL_2 and more) |
| 357 | * bkops executed synchronously, otherwise |
| 358 | * the operation is in progress |
| 359 | */ |
| 360 | if (!use_busy_signal) |
| 361 | mmc_card_set_doing_bkops(card); |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 362 | else |
| 363 | mmc_retune_release(card->host); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 364 | out: |
| 365 | mmc_release_host(card->host); |
| 366 | } |
| 367 | EXPORT_SYMBOL(mmc_start_bkops); |
| 368 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 369 | /* |
| 370 | * mmc_wait_data_done() - done callback for data request |
| 371 | * @mrq: done data request |
| 372 | * |
| 373 | * Wakes up mmc context, passed as a callback to host controller driver |
| 374 | */ |
| 375 | static void mmc_wait_data_done(struct mmc_request *mrq) |
| 376 | { |
Jialing Fu | 71f8a4b | 2015-08-28 11:13:09 +0800 | [diff] [blame] | 377 | struct mmc_context_info *context_info = &mrq->host->context_info; |
| 378 | |
| 379 | context_info->is_done_rcv = true; |
| 380 | wake_up_interruptible(&context_info->wait); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 381 | } |
| 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | static void mmc_wait_done(struct mmc_request *mrq) |
| 384 | { |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 385 | complete(&mrq->completion); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 388 | /* |
| 389 | *__mmc_start_data_req() - starts data request |
| 390 | * @host: MMC host to start the request |
| 391 | * @mrq: data request to start |
| 392 | * |
| 393 | * Sets the done callback to be called when request is completed by the card. |
| 394 | * Starts data mmc request execution |
| 395 | */ |
| 396 | static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) |
| 397 | { |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 398 | int err; |
| 399 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 400 | mrq->done = mmc_wait_data_done; |
| 401 | mrq->host = host; |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 402 | |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 403 | err = mmc_start_request(host, mrq); |
| 404 | if (err) { |
| 405 | mrq->cmd->error = err; |
| 406 | mmc_wait_data_done(mrq); |
| 407 | } |
| 408 | |
| 409 | return err; |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 410 | } |
| 411 | |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 412 | 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] | 413 | { |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 414 | int err; |
| 415 | |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 416 | init_completion(&mrq->completion); |
| 417 | mrq->done = mmc_wait_done; |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 418 | |
| 419 | err = mmc_start_request(host, mrq); |
| 420 | if (err) { |
| 421 | mrq->cmd->error = err; |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 422 | complete(&mrq->completion); |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 423 | } |
Adrian Hunter | f100c1c | 2014-12-05 19:41:02 +0200 | [diff] [blame] | 424 | |
| 425 | return err; |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 426 | } |
| 427 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 428 | /* |
| 429 | * mmc_wait_for_data_req_done() - wait for request completed |
| 430 | * @host: MMC host to prepare the command. |
| 431 | * @mrq: MMC request to wait for |
| 432 | * |
| 433 | * Blocks MMC context till host controller will ack end of data request |
| 434 | * execution or new request notification arrives from the block layer. |
| 435 | * Handles command retries. |
| 436 | * |
| 437 | * Returns enum mmc_blk_status after checking errors. |
| 438 | */ |
| 439 | static int mmc_wait_for_data_req_done(struct mmc_host *host, |
| 440 | struct mmc_request *mrq, |
| 441 | struct mmc_async_req *next_req) |
| 442 | { |
| 443 | struct mmc_command *cmd; |
| 444 | struct mmc_context_info *context_info = &host->context_info; |
| 445 | int err; |
| 446 | unsigned long flags; |
| 447 | |
| 448 | while (1) { |
| 449 | wait_event_interruptible(context_info->wait, |
| 450 | (context_info->is_done_rcv || |
| 451 | context_info->is_new_req)); |
| 452 | spin_lock_irqsave(&context_info->lock, flags); |
| 453 | context_info->is_waiting_last_req = false; |
| 454 | spin_unlock_irqrestore(&context_info->lock, flags); |
| 455 | if (context_info->is_done_rcv) { |
| 456 | context_info->is_done_rcv = false; |
| 457 | context_info->is_new_req = false; |
| 458 | cmd = mrq->cmd; |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 459 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 460 | if (!cmd->error || !cmd->retries || |
| 461 | mmc_card_removed(host->card)) { |
| 462 | err = host->areq->err_check(host->card, |
| 463 | host->areq); |
| 464 | break; /* return err */ |
| 465 | } else { |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 466 | mmc_retune_recheck(host); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 467 | pr_info("%s: req failed (CMD%u): %d, retrying...\n", |
| 468 | mmc_hostname(host), |
| 469 | cmd->opcode, cmd->error); |
| 470 | cmd->retries--; |
| 471 | cmd->error = 0; |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 472 | __mmc_start_request(host, mrq); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 473 | continue; /* wait for done/new event again */ |
| 474 | } |
| 475 | } else if (context_info->is_new_req) { |
| 476 | context_info->is_new_req = false; |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 477 | if (!next_req) |
| 478 | return MMC_BLK_NEW_REQUEST; |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 479 | } |
| 480 | } |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 481 | mmc_retune_release(host); |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 482 | return err; |
| 483 | } |
| 484 | |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 485 | static void mmc_wait_for_req_done(struct mmc_host *host, |
| 486 | struct mmc_request *mrq) |
| 487 | { |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 488 | struct mmc_command *cmd; |
| 489 | |
| 490 | while (1) { |
| 491 | wait_for_completion(&mrq->completion); |
| 492 | |
| 493 | cmd = mrq->cmd; |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 494 | |
| 495 | /* |
| 496 | * If host has timed out waiting for the sanitize |
| 497 | * to complete, card might be still in programming state |
| 498 | * so let's try to bring the card out of programming |
| 499 | * state. |
| 500 | */ |
| 501 | if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { |
| 502 | if (!mmc_interrupt_hpi(host->card)) { |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 503 | pr_warn("%s: %s: Interrupted sanitize\n", |
| 504 | mmc_hostname(host), __func__); |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 505 | cmd->error = 0; |
| 506 | break; |
| 507 | } else { |
| 508 | pr_err("%s: %s: Failed to interrupt sanitize\n", |
| 509 | mmc_hostname(host), __func__); |
| 510 | } |
| 511 | } |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 512 | if (!cmd->error || !cmd->retries || |
| 513 | mmc_card_removed(host->card)) |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 514 | break; |
| 515 | |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 516 | mmc_retune_recheck(host); |
| 517 | |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 518 | pr_debug("%s: req failed (CMD%u): %d, retrying...\n", |
| 519 | mmc_hostname(host), cmd->opcode, cmd->error); |
| 520 | cmd->retries--; |
| 521 | cmd->error = 0; |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 522 | __mmc_start_request(host, mrq); |
Adrian Hunter | 08a7e1d | 2011-10-03 15:33:33 +0300 | [diff] [blame] | 523 | } |
Adrian Hunter | 90a8148 | 2015-05-07 13:10:14 +0300 | [diff] [blame] | 524 | |
| 525 | mmc_retune_release(host); |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | /** |
| 529 | * mmc_pre_req - Prepare for a new request |
| 530 | * @host: MMC host to prepare command |
| 531 | * @mrq: MMC request to prepare for |
| 532 | * @is_first_req: true if there is no previous started request |
| 533 | * that may run in parellel to this call, otherwise false |
| 534 | * |
| 535 | * mmc_pre_req() is called in prior to mmc_start_req() to let |
| 536 | * host prepare for the new request. Preparation of a request may be |
| 537 | * performed while another request is running on the host. |
| 538 | */ |
| 539 | static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, |
| 540 | bool is_first_req) |
| 541 | { |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 542 | if (host->ops->pre_req) |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 543 | host->ops->pre_req(host, mrq, is_first_req); |
| 544 | } |
| 545 | |
| 546 | /** |
| 547 | * mmc_post_req - Post process a completed request |
| 548 | * @host: MMC host to post process command |
| 549 | * @mrq: MMC request to post process for |
| 550 | * @err: Error, if non zero, clean up any resources made in pre_req |
| 551 | * |
| 552 | * Let the host post process a completed request. Post processing of |
| 553 | * a request may be performed while another reuqest is running. |
| 554 | */ |
| 555 | static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, |
| 556 | int err) |
| 557 | { |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 558 | if (host->ops->post_req) |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 559 | host->ops->post_req(host, mrq, err); |
| 560 | } |
| 561 | |
| 562 | /** |
| 563 | * mmc_start_req - start a non-blocking request |
| 564 | * @host: MMC host to start command |
| 565 | * @areq: async request to start |
| 566 | * @error: out parameter returns 0 for success, otherwise non zero |
| 567 | * |
| 568 | * Start a new MMC custom command request for a host. |
| 569 | * If there is on ongoing async request wait for completion |
| 570 | * of that request and start the new one and return. |
| 571 | * Does not wait for the new request to complete. |
| 572 | * |
| 573 | * Returns the completed request, NULL in case of none completed. |
| 574 | * Wait for the an ongoing request (previoulsy started) to complete and |
| 575 | * return the completed request. If there is no ongoing request, NULL |
| 576 | * is returned without waiting. NULL is not an error condition. |
| 577 | */ |
| 578 | struct mmc_async_req *mmc_start_req(struct mmc_host *host, |
| 579 | struct mmc_async_req *areq, int *error) |
| 580 | { |
| 581 | int err = 0; |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 582 | int start_err = 0; |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 583 | struct mmc_async_req *data = host->areq; |
| 584 | |
| 585 | /* Prepare a new request */ |
| 586 | if (areq) |
| 587 | mmc_pre_req(host, areq->mrq, !host->areq); |
| 588 | |
| 589 | if (host->areq) { |
Jaehoon Chung | f5c2758 | 2013-02-01 14:32:22 +0900 | [diff] [blame] | 590 | err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq); |
| 591 | if (err == MMC_BLK_NEW_REQUEST) { |
| 592 | if (error) |
| 593 | *error = err; |
| 594 | /* |
| 595 | * The previous request was not completed, |
| 596 | * nothing to return |
| 597 | */ |
| 598 | return NULL; |
| 599 | } |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 600 | /* |
| 601 | * Check BKOPS urgency for each R1 response |
| 602 | */ |
| 603 | if (host->card && mmc_card_mmc(host->card) && |
| 604 | ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || |
| 605 | (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && |
Srinivas Kandagatla | 64b12a6 | 2014-10-08 12:24:24 +0100 | [diff] [blame] | 606 | (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) { |
| 607 | |
| 608 | /* Cancel the prepared request */ |
| 609 | if (areq) |
| 610 | mmc_post_req(host, areq->mrq, -EINVAL); |
| 611 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 612 | mmc_start_bkops(host->card, true); |
Srinivas Kandagatla | 64b12a6 | 2014-10-08 12:24:24 +0100 | [diff] [blame] | 613 | |
| 614 | /* prepare the request again */ |
| 615 | if (areq) |
| 616 | mmc_pre_req(host, areq->mrq, !host->areq); |
| 617 | } |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 618 | } |
| 619 | |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 620 | if (!err && areq) |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 621 | start_err = __mmc_start_data_req(host, areq->mrq); |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 622 | |
| 623 | if (host->areq) |
| 624 | mmc_post_req(host, host->areq->mrq, 0); |
| 625 | |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 626 | /* Cancel a prepared request if it was not started. */ |
| 627 | if ((err || start_err) && areq) |
Jaehoon Chung | f5c2758 | 2013-02-01 14:32:22 +0900 | [diff] [blame] | 628 | mmc_post_req(host, areq->mrq, -EINVAL); |
Ulf Hansson | 956d9fd | 2012-03-05 15:52:43 +0100 | [diff] [blame] | 629 | |
| 630 | if (err) |
| 631 | host->areq = NULL; |
| 632 | else |
| 633 | host->areq = areq; |
| 634 | |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 635 | if (error) |
| 636 | *error = err; |
| 637 | return data; |
| 638 | } |
| 639 | EXPORT_SYMBOL(mmc_start_req); |
| 640 | |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 641 | /** |
| 642 | * mmc_wait_for_req - start a request and wait for completion |
| 643 | * @host: MMC host to start command |
| 644 | * @mrq: MMC request to start |
| 645 | * |
| 646 | * Start a new MMC custom command request for a host, and wait |
| 647 | * for the command to complete. Does not attempt to parse the |
| 648 | * response. |
| 649 | */ |
| 650 | 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] | 651 | { |
Per Forlin | aa8b683 | 2011-07-01 18:55:22 +0200 | [diff] [blame] | 652 | __mmc_start_req(host, mrq); |
| 653 | mmc_wait_for_req_done(host, mrq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | EXPORT_SYMBOL(mmc_wait_for_req); |
| 656 | |
| 657 | /** |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 658 | * mmc_interrupt_hpi - Issue for High priority Interrupt |
| 659 | * @card: the MMC card associated with the HPI transfer |
| 660 | * |
| 661 | * Issued High Priority Interrupt, and check for card status |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 662 | * until out-of prg-state. |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 663 | */ |
| 664 | int mmc_interrupt_hpi(struct mmc_card *card) |
| 665 | { |
| 666 | int err; |
| 667 | u32 status; |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 668 | unsigned long prg_wait; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 669 | |
| 670 | BUG_ON(!card); |
| 671 | |
| 672 | if (!card->ext_csd.hpi_en) { |
| 673 | pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); |
| 674 | return 1; |
| 675 | } |
| 676 | |
| 677 | mmc_claim_host(card->host); |
| 678 | err = mmc_send_status(card, &status); |
| 679 | if (err) { |
| 680 | pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); |
| 681 | goto out; |
| 682 | } |
| 683 | |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 684 | switch (R1_CURRENT_STATE(status)) { |
| 685 | case R1_STATE_IDLE: |
| 686 | case R1_STATE_READY: |
| 687 | case R1_STATE_STBY: |
Venkatraman S | 211d4fe | 2012-08-07 19:24:45 +0530 | [diff] [blame] | 688 | case R1_STATE_TRAN: |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 689 | /* |
Venkatraman S | 211d4fe | 2012-08-07 19:24:45 +0530 | [diff] [blame] | 690 | * In idle and transfer states, HPI is not needed and the caller |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 691 | * can issue the next intended command immediately |
| 692 | */ |
| 693 | goto out; |
| 694 | case R1_STATE_PRG: |
| 695 | break; |
| 696 | default: |
| 697 | /* In all other states, it's illegal to issue HPI */ |
| 698 | pr_debug("%s: HPI cannot be sent. Card state=%d\n", |
| 699 | mmc_hostname(card->host), R1_CURRENT_STATE(status)); |
| 700 | err = -EINVAL; |
| 701 | goto out; |
| 702 | } |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 703 | |
Venkatraman S | 6af9e96 | 2012-06-22 11:42:36 +0530 | [diff] [blame] | 704 | err = mmc_send_hpi_cmd(card, &status); |
| 705 | if (err) |
| 706 | goto out; |
| 707 | |
| 708 | prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); |
| 709 | do { |
| 710 | err = mmc_send_status(card, &status); |
| 711 | |
| 712 | if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) |
| 713 | break; |
| 714 | if (time_after(jiffies, prg_wait)) |
| 715 | err = -ETIMEDOUT; |
| 716 | } while (!err); |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 717 | |
| 718 | out: |
| 719 | mmc_release_host(card->host); |
| 720 | return err; |
| 721 | } |
| 722 | EXPORT_SYMBOL(mmc_interrupt_hpi); |
| 723 | |
| 724 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | * mmc_wait_for_cmd - start a command and wait for completion |
| 726 | * @host: MMC host to start command |
| 727 | * @cmd: MMC command to start |
| 728 | * @retries: maximum number of retries |
| 729 | * |
| 730 | * Start a new MMC command for a host, and wait for the command |
| 731 | * to complete. Return any error that occurred while the command |
| 732 | * was executing. Do not attempt to parse the response. |
| 733 | */ |
| 734 | int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) |
| 735 | { |
Venkatraman S | ad5fd97 | 2011-08-25 00:30:50 +0530 | [diff] [blame] | 736 | struct mmc_request mrq = {NULL}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 738 | WARN_ON(!host->claimed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
| 741 | cmd->retries = retries; |
| 742 | |
| 743 | mrq.cmd = cmd; |
| 744 | cmd->data = NULL; |
| 745 | |
| 746 | mmc_wait_for_req(host, &mrq); |
| 747 | |
| 748 | return cmd->error; |
| 749 | } |
| 750 | |
| 751 | EXPORT_SYMBOL(mmc_wait_for_cmd); |
| 752 | |
Pierre Ossman | 335eadf | 2005-09-06 15:18:50 -0700 | [diff] [blame] | 753 | /** |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 754 | * mmc_stop_bkops - stop ongoing BKOPS |
| 755 | * @card: MMC card to check BKOPS |
| 756 | * |
| 757 | * Send HPI command to stop ongoing background operations to |
| 758 | * allow rapid servicing of foreground operations, e.g. read/ |
| 759 | * writes. Wait until the card comes out of the programming state |
| 760 | * to avoid errors in servicing read/write requests. |
| 761 | */ |
| 762 | int mmc_stop_bkops(struct mmc_card *card) |
| 763 | { |
| 764 | int err = 0; |
| 765 | |
| 766 | BUG_ON(!card); |
| 767 | err = mmc_interrupt_hpi(card); |
| 768 | |
| 769 | /* |
| 770 | * If err is EINVAL, we can't issue an HPI. |
| 771 | * It should complete the BKOPS. |
| 772 | */ |
| 773 | if (!err || (err == -EINVAL)) { |
| 774 | mmc_card_clr_doing_bkops(card); |
Adrian Hunter | 66073d8 | 2015-05-07 13:10:17 +0300 | [diff] [blame] | 775 | mmc_retune_release(card->host); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 776 | err = 0; |
| 777 | } |
| 778 | |
| 779 | return err; |
| 780 | } |
| 781 | EXPORT_SYMBOL(mmc_stop_bkops); |
| 782 | |
| 783 | int mmc_read_bkops_status(struct mmc_card *card) |
| 784 | { |
| 785 | int err; |
| 786 | u8 *ext_csd; |
| 787 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 788 | mmc_claim_host(card->host); |
Ulf Hansson | b2cada7 | 2014-10-17 11:48:23 +0200 | [diff] [blame] | 789 | err = mmc_get_ext_csd(card, &ext_csd); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 790 | mmc_release_host(card->host); |
| 791 | if (err) |
Ulf Hansson | b2cada7 | 2014-10-17 11:48:23 +0200 | [diff] [blame] | 792 | return err; |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 793 | |
| 794 | card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; |
| 795 | 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] | 796 | kfree(ext_csd); |
Ulf Hansson | b2cada7 | 2014-10-17 11:48:23 +0200 | [diff] [blame] | 797 | return 0; |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 798 | } |
| 799 | EXPORT_SYMBOL(mmc_read_bkops_status); |
| 800 | |
| 801 | /** |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 802 | * mmc_set_data_timeout - set the timeout for a data command |
| 803 | * @data: data phase for command |
| 804 | * @card: the MMC card associated with the data transfer |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 805 | * |
| 806 | * Computes the data timeout parameters according to the |
| 807 | * correct algorithm given the card type. |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 808 | */ |
Pierre Ossman | b146d26 | 2007-07-24 19:16:54 +0200 | [diff] [blame] | 809 | 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] | 810 | { |
| 811 | unsigned int mult; |
| 812 | |
| 813 | /* |
Pierre Ossman | e6f918b | 2007-08-07 14:11:55 +0200 | [diff] [blame] | 814 | * SDIO cards only define an upper 1 s limit on access. |
| 815 | */ |
| 816 | if (mmc_card_sdio(card)) { |
| 817 | data->timeout_ns = 1000000000; |
| 818 | data->timeout_clks = 0; |
| 819 | return; |
| 820 | } |
| 821 | |
| 822 | /* |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 823 | * SD cards use a 100 multiplier rather than 10 |
| 824 | */ |
| 825 | mult = mmc_card_sd(card) ? 100 : 10; |
| 826 | |
| 827 | /* |
| 828 | * Scale up the multiplier (and therefore the timeout) by |
| 829 | * the r2w factor for writes. |
| 830 | */ |
Pierre Ossman | b146d26 | 2007-07-24 19:16:54 +0200 | [diff] [blame] | 831 | if (data->flags & MMC_DATA_WRITE) |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 832 | mult <<= card->csd.r2w_factor; |
| 833 | |
| 834 | data->timeout_ns = card->csd.tacc_ns * mult; |
| 835 | data->timeout_clks = card->csd.tacc_clks * mult; |
| 836 | |
| 837 | /* |
| 838 | * SD cards also have an upper limit on the timeout. |
| 839 | */ |
| 840 | if (mmc_card_sd(card)) { |
| 841 | unsigned int timeout_us, limit_us; |
| 842 | |
| 843 | timeout_us = data->timeout_ns / 1000; |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 844 | if (card->host->ios.clock) |
Linus Walleij | e9b8684 | 2011-01-05 00:44:32 +0100 | [diff] [blame] | 845 | timeout_us += data->timeout_clks * 1000 / |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 846 | (card->host->ios.clock / 1000); |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 847 | |
Pierre Ossman | b146d26 | 2007-07-24 19:16:54 +0200 | [diff] [blame] | 848 | if (data->flags & MMC_DATA_WRITE) |
Pierre Ossman | 493890e | 2008-10-26 12:37:25 +0100 | [diff] [blame] | 849 | /* |
Paul Walmsley | 3bdc9ba | 2012-03-12 04:58:00 -0600 | [diff] [blame] | 850 | * The MMC spec "It is strongly recommended |
| 851 | * for hosts to implement more than 500ms |
| 852 | * timeout value even if the card indicates |
| 853 | * the 250ms maximum busy length." Even the |
| 854 | * previous value of 300ms is known to be |
| 855 | * insufficient for some cards. |
Pierre Ossman | 493890e | 2008-10-26 12:37:25 +0100 | [diff] [blame] | 856 | */ |
Paul Walmsley | 3bdc9ba | 2012-03-12 04:58:00 -0600 | [diff] [blame] | 857 | limit_us = 3000000; |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 858 | else |
| 859 | limit_us = 100000; |
| 860 | |
Philip Langdale | fba68bd | 2007-01-04 06:57:32 -0800 | [diff] [blame] | 861 | /* |
| 862 | * SDHC cards always use these fixed values. |
| 863 | */ |
| 864 | if (timeout_us > limit_us || mmc_card_blockaddr(card)) { |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 865 | data->timeout_ns = limit_us * 1000; |
| 866 | data->timeout_clks = 0; |
| 867 | } |
Stefan Wahren | f7bf11a | 2014-04-03 17:32:05 +0200 | [diff] [blame] | 868 | |
| 869 | /* assign limit value if invalid */ |
| 870 | if (timeout_us == 0) |
| 871 | data->timeout_ns = limit_us * 1000; |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 872 | } |
Stefan Nilsson XK | 6de5fc9 | 2011-11-03 09:44:12 +0100 | [diff] [blame] | 873 | |
| 874 | /* |
| 875 | * Some cards require longer data read timeout than indicated in CSD. |
| 876 | * Address this by setting the read timeout to a "reasonably high" |
| 877 | * value. For the cards tested, 300ms has proven enough. If necessary, |
| 878 | * this value can be increased if other problematic cards require this. |
| 879 | */ |
| 880 | if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { |
| 881 | data->timeout_ns = 300000000; |
| 882 | data->timeout_clks = 0; |
| 883 | } |
| 884 | |
Wolfgang Muees | c0c8887 | 2009-03-11 14:28:39 +0100 | [diff] [blame] | 885 | /* |
| 886 | * Some cards need very high timeouts if driven in SPI mode. |
| 887 | * The worst observed timeout was 900ms after writing a |
| 888 | * continuous stream of data until the internal logic |
| 889 | * overflowed. |
| 890 | */ |
| 891 | if (mmc_host_is_spi(card->host)) { |
| 892 | if (data->flags & MMC_DATA_WRITE) { |
| 893 | if (data->timeout_ns < 1000000000) |
| 894 | data->timeout_ns = 1000000000; /* 1s */ |
| 895 | } else { |
| 896 | if (data->timeout_ns < 100000000) |
| 897 | data->timeout_ns = 100000000; /* 100ms */ |
| 898 | } |
| 899 | } |
Russell King | d773d72 | 2006-09-07 15:57:12 +0100 | [diff] [blame] | 900 | } |
| 901 | EXPORT_SYMBOL(mmc_set_data_timeout); |
| 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | /** |
Pierre Ossman | ad3868b | 2008-06-28 12:52:45 +0200 | [diff] [blame] | 904 | * mmc_align_data_size - pads a transfer size to a more optimal value |
| 905 | * @card: the MMC card associated with the data transfer |
| 906 | * @sz: original transfer size |
| 907 | * |
| 908 | * Pads the original data size with a number of extra bytes in |
| 909 | * order to avoid controller bugs and/or performance hits |
| 910 | * (e.g. some controllers revert to PIO for certain sizes). |
| 911 | * |
| 912 | * Returns the improved size, which might be unmodified. |
| 913 | * |
| 914 | * Note that this function is only relevant when issuing a |
| 915 | * single scatter gather entry. |
| 916 | */ |
| 917 | unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) |
| 918 | { |
| 919 | /* |
| 920 | * FIXME: We don't have a system for the controller to tell |
| 921 | * the core about its problems yet, so for now we just 32-bit |
| 922 | * align the size. |
| 923 | */ |
| 924 | sz = ((sz + 3) / 4) * 4; |
| 925 | |
| 926 | return sz; |
| 927 | } |
| 928 | EXPORT_SYMBOL(mmc_align_data_size); |
| 929 | |
| 930 | /** |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 931 | * __mmc_claim_host - exclusively claim a host |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | * @host: mmc host to claim |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 933 | * @abort: whether or not the operation should be aborted |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | * |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 935 | * Claim a host for a set of operations. If @abort is non null and |
| 936 | * dereference a non-zero value then this will return prematurely with |
| 937 | * that non-zero value without acquiring the lock. Returns zero |
| 938 | * with the lock held otherwise. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | */ |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 940 | int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | { |
| 942 | DECLARE_WAITQUEUE(wait, current); |
| 943 | unsigned long flags; |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 944 | int stop; |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 945 | bool pm = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
Pierre Ossman | cf795bf | 2007-07-11 20:28:02 +0200 | [diff] [blame] | 947 | might_sleep(); |
| 948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | add_wait_queue(&host->wq, &wait); |
| 950 | spin_lock_irqsave(&host->lock, flags); |
| 951 | while (1) { |
| 952 | set_current_state(TASK_UNINTERRUPTIBLE); |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 953 | stop = abort ? atomic_read(abort) : 0; |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 954 | if (stop || !host->claimed || host->claimer == current) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | break; |
| 956 | spin_unlock_irqrestore(&host->lock, flags); |
| 957 | schedule(); |
| 958 | spin_lock_irqsave(&host->lock, flags); |
| 959 | } |
| 960 | set_current_state(TASK_RUNNING); |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 961 | if (!stop) { |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 962 | host->claimed = 1; |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 963 | host->claimer = current; |
| 964 | host->claim_cnt += 1; |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 965 | if (host->claim_cnt == 1) |
| 966 | pm = true; |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 967 | } else |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 968 | wake_up(&host->wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | spin_unlock_irqrestore(&host->lock, flags); |
| 970 | remove_wait_queue(&host->wq, &wait); |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 971 | |
| 972 | if (pm) |
| 973 | pm_runtime_get_sync(mmc_dev(host)); |
| 974 | |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 975 | return stop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | } |
Nicolas Pitre | 2342f33 | 2007-06-30 16:21:52 +0200 | [diff] [blame] | 977 | EXPORT_SYMBOL(__mmc_claim_host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 979 | /** |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 980 | * mmc_release_host - release a host |
Ulf Hansson | ab1efd2 | 2011-03-09 09:11:02 +0100 | [diff] [blame] | 981 | * @host: mmc host to release |
| 982 | * |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 983 | * Release a MMC host, allowing others to claim the host |
| 984 | * for their operations. |
Ulf Hansson | ab1efd2 | 2011-03-09 09:11:02 +0100 | [diff] [blame] | 985 | */ |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 986 | void mmc_release_host(struct mmc_host *host) |
Adrian Hunter | 8ea926b | 2009-09-22 16:44:29 -0700 | [diff] [blame] | 987 | { |
| 988 | unsigned long flags; |
| 989 | |
Adrian Hunter | 907d2e7 | 2012-02-29 09:17:21 +0200 | [diff] [blame] | 990 | WARN_ON(!host->claimed); |
| 991 | |
Adrian Hunter | 8ea926b | 2009-09-22 16:44:29 -0700 | [diff] [blame] | 992 | spin_lock_irqsave(&host->lock, flags); |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 993 | if (--host->claim_cnt) { |
| 994 | /* Release for nested claim */ |
| 995 | spin_unlock_irqrestore(&host->lock, flags); |
| 996 | } else { |
| 997 | host->claimed = 0; |
| 998 | host->claimer = NULL; |
| 999 | spin_unlock_irqrestore(&host->lock, flags); |
| 1000 | wake_up(&host->wq); |
Ulf Hansson | 9250aea | 2015-03-27 12:15:15 +0100 | [diff] [blame] | 1001 | pm_runtime_mark_last_busy(mmc_dev(host)); |
| 1002 | pm_runtime_put_autosuspend(mmc_dev(host)); |
Adrian Hunter | 319a3f1 | 2009-09-22 16:44:30 -0700 | [diff] [blame] | 1003 | } |
Adrian Hunter | 8ea926b | 2009-09-22 16:44:29 -0700 | [diff] [blame] | 1004 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | EXPORT_SYMBOL(mmc_release_host); |
| 1006 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1007 | /* |
Ulf Hansson | e94cfef | 2013-05-02 14:02:38 +0200 | [diff] [blame] | 1008 | * This is a helper function, which fetches a runtime pm reference for the |
| 1009 | * card device and also claims the host. |
| 1010 | */ |
| 1011 | void mmc_get_card(struct mmc_card *card) |
| 1012 | { |
| 1013 | pm_runtime_get_sync(&card->dev); |
| 1014 | mmc_claim_host(card->host); |
| 1015 | } |
| 1016 | EXPORT_SYMBOL(mmc_get_card); |
| 1017 | |
| 1018 | /* |
| 1019 | * This is a helper function, which releases the host and drops the runtime |
| 1020 | * pm reference for the card device. |
| 1021 | */ |
| 1022 | void mmc_put_card(struct mmc_card *card) |
| 1023 | { |
| 1024 | mmc_release_host(card->host); |
| 1025 | pm_runtime_mark_last_busy(&card->dev); |
| 1026 | pm_runtime_put_autosuspend(&card->dev); |
| 1027 | } |
| 1028 | EXPORT_SYMBOL(mmc_put_card); |
| 1029 | |
| 1030 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1031 | * Internal function that does the actual ios call to the host driver, |
| 1032 | * optionally printing some debug output. |
| 1033 | */ |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1034 | static inline void mmc_set_ios(struct mmc_host *host) |
| 1035 | { |
| 1036 | struct mmc_ios *ios = &host->ios; |
| 1037 | |
Pierre Ossman | cd9277c | 2007-02-18 12:07:47 +0100 | [diff] [blame] | 1038 | pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u " |
| 1039 | "width %u timing %u\n", |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1040 | mmc_hostname(host), ios->clock, ios->bus_mode, |
| 1041 | ios->power_mode, ios->chip_select, ios->vdd, |
Pierre Ossman | cd9277c | 2007-02-18 12:07:47 +0100 | [diff] [blame] | 1042 | ios->bus_width, ios->timing); |
Philip Langdale | fba68bd | 2007-01-04 06:57:32 -0800 | [diff] [blame] | 1043 | |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1044 | host->ops->set_ios(host, ios); |
| 1045 | } |
| 1046 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1047 | /* |
| 1048 | * Control chip select pin on a host. |
| 1049 | */ |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 1050 | void mmc_set_chip_select(struct mmc_host *host, int mode) |
Pierre Ossman | b57c43a | 2005-09-06 15:18:53 -0700 | [diff] [blame] | 1051 | { |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 1052 | host->ios.chip_select = mode; |
| 1053 | mmc_set_ios(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1057 | * Sets the host clock to the highest possible frequency that |
| 1058 | * is below "hz". |
| 1059 | */ |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 1060 | void mmc_set_clock(struct mmc_host *host, unsigned int hz) |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1061 | { |
Adrian Hunter | 6a98f1e | 2014-09-23 23:00:26 +0300 | [diff] [blame] | 1062 | WARN_ON(hz && hz < host->f_min); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1063 | |
| 1064 | if (hz > host->f_max) |
| 1065 | hz = host->f_max; |
| 1066 | |
| 1067 | host->ios.clock = hz; |
| 1068 | mmc_set_ios(host); |
| 1069 | } |
| 1070 | |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1071 | int mmc_execute_tuning(struct mmc_card *card) |
| 1072 | { |
| 1073 | struct mmc_host *host = card->host; |
| 1074 | u32 opcode; |
| 1075 | int err; |
| 1076 | |
| 1077 | if (!host->ops->execute_tuning) |
| 1078 | return 0; |
| 1079 | |
| 1080 | if (mmc_card_mmc(card)) |
| 1081 | opcode = MMC_SEND_TUNING_BLOCK_HS200; |
| 1082 | else |
| 1083 | opcode = MMC_SEND_TUNING_BLOCK; |
| 1084 | |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1085 | err = host->ops->execute_tuning(host, opcode); |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1086 | |
| 1087 | if (err) |
| 1088 | pr_err("%s: tuning execution failed\n", mmc_hostname(host)); |
Adrian Hunter | 79d5a65 | 2015-05-07 13:10:13 +0300 | [diff] [blame] | 1089 | else |
| 1090 | mmc_retune_enable(host); |
Adrian Hunter | 63e415c | 2014-12-05 19:40:59 +0200 | [diff] [blame] | 1091 | |
| 1092 | return err; |
| 1093 | } |
| 1094 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1095 | /* |
| 1096 | * Change the bus mode (open drain/push-pull) of a host. |
| 1097 | */ |
| 1098 | void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) |
| 1099 | { |
| 1100 | host->ios.bus_mode = mode; |
| 1101 | mmc_set_ios(host); |
| 1102 | } |
| 1103 | |
| 1104 | /* |
| 1105 | * Change data bus width of a host. |
| 1106 | */ |
| 1107 | void mmc_set_bus_width(struct mmc_host *host, unsigned int width) |
| 1108 | { |
Philip Rakity | 4c4cb17 | 2011-05-13 11:17:18 +0530 | [diff] [blame] | 1109 | host->ios.bus_width = width; |
| 1110 | mmc_set_ios(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1111 | } |
| 1112 | |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1113 | /* |
| 1114 | * Set initial state after a power cycle or a hw_reset. |
| 1115 | */ |
| 1116 | void mmc_set_initial_state(struct mmc_host *host) |
| 1117 | { |
Adrian Hunter | 79d5a65 | 2015-05-07 13:10:13 +0300 | [diff] [blame] | 1118 | mmc_retune_disable(host); |
| 1119 | |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1120 | if (mmc_host_is_spi(host)) |
| 1121 | host->ios.chip_select = MMC_CS_HIGH; |
| 1122 | else |
| 1123 | host->ios.chip_select = MMC_CS_DONTCARE; |
| 1124 | host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; |
| 1125 | host->ios.bus_width = MMC_BUS_WIDTH_1; |
| 1126 | host->ios.timing = MMC_TIMING_LEGACY; |
Adrian Hunter | 75e8a22 | 2015-02-06 14:12:51 +0200 | [diff] [blame] | 1127 | host->ios.drv_type = 0; |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1128 | |
| 1129 | mmc_set_ios(host); |
| 1130 | } |
| 1131 | |
Anton Vorontsov | 86e8286 | 2008-11-26 22:54:17 +0300 | [diff] [blame] | 1132 | /** |
| 1133 | * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number |
| 1134 | * @vdd: voltage (mV) |
| 1135 | * @low_bits: prefer low bits in boundary cases |
| 1136 | * |
| 1137 | * This function returns the OCR bit number according to the provided @vdd |
| 1138 | * value. If conversion is not possible a negative errno value returned. |
| 1139 | * |
| 1140 | * Depending on the @low_bits flag the function prefers low or high OCR bits |
| 1141 | * on boundary voltages. For example, |
| 1142 | * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33); |
| 1143 | * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34); |
| 1144 | * |
| 1145 | * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21). |
| 1146 | */ |
| 1147 | static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits) |
| 1148 | { |
| 1149 | const int max_bit = ilog2(MMC_VDD_35_36); |
| 1150 | int bit; |
| 1151 | |
| 1152 | if (vdd < 1650 || vdd > 3600) |
| 1153 | return -EINVAL; |
| 1154 | |
| 1155 | if (vdd >= 1650 && vdd <= 1950) |
| 1156 | return ilog2(MMC_VDD_165_195); |
| 1157 | |
| 1158 | if (low_bits) |
| 1159 | vdd -= 1; |
| 1160 | |
| 1161 | /* Base 2000 mV, step 100 mV, bit's base 8. */ |
| 1162 | bit = (vdd - 2000) / 100 + 8; |
| 1163 | if (bit > max_bit) |
| 1164 | return max_bit; |
| 1165 | return bit; |
| 1166 | } |
| 1167 | |
| 1168 | /** |
| 1169 | * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask |
| 1170 | * @vdd_min: minimum voltage value (mV) |
| 1171 | * @vdd_max: maximum voltage value (mV) |
| 1172 | * |
| 1173 | * This function returns the OCR mask bits according to the provided @vdd_min |
| 1174 | * and @vdd_max values. If conversion is not possible the function returns 0. |
| 1175 | * |
| 1176 | * Notes wrt boundary cases: |
| 1177 | * This function sets the OCR bits for all boundary voltages, for example |
| 1178 | * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 | |
| 1179 | * MMC_VDD_34_35 mask. |
| 1180 | */ |
| 1181 | u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) |
| 1182 | { |
| 1183 | u32 mask = 0; |
| 1184 | |
| 1185 | if (vdd_max < vdd_min) |
| 1186 | return 0; |
| 1187 | |
| 1188 | /* Prefer high bits for the boundary vdd_max values. */ |
| 1189 | vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false); |
| 1190 | if (vdd_max < 0) |
| 1191 | return 0; |
| 1192 | |
| 1193 | /* Prefer low bits for the boundary vdd_min values. */ |
| 1194 | vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true); |
| 1195 | if (vdd_min < 0) |
| 1196 | return 0; |
| 1197 | |
| 1198 | /* Fill the mask, from max bit to min bit. */ |
| 1199 | while (vdd_max >= vdd_min) |
| 1200 | mask |= 1 << vdd_max--; |
| 1201 | |
| 1202 | return mask; |
| 1203 | } |
| 1204 | EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); |
| 1205 | |
Haijun Zhang | 6e9e318 | 2013-08-26 09:19:22 +0800 | [diff] [blame] | 1206 | #ifdef CONFIG_OF |
| 1207 | |
| 1208 | /** |
| 1209 | * mmc_of_parse_voltage - return mask of supported voltages |
| 1210 | * @np: The device node need to be parsed. |
| 1211 | * @mask: mask of voltages available for MMC/SD/SDIO |
| 1212 | * |
| 1213 | * 1. Return zero on success. |
| 1214 | * 2. Return negative errno: voltage-range is invalid. |
| 1215 | */ |
| 1216 | int mmc_of_parse_voltage(struct device_node *np, u32 *mask) |
| 1217 | { |
| 1218 | const u32 *voltage_ranges; |
| 1219 | int num_ranges, i; |
| 1220 | |
| 1221 | voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges); |
| 1222 | num_ranges = num_ranges / sizeof(*voltage_ranges) / 2; |
| 1223 | if (!voltage_ranges || !num_ranges) { |
| 1224 | pr_info("%s: voltage-ranges unspecified\n", np->full_name); |
| 1225 | return -EINVAL; |
| 1226 | } |
| 1227 | |
| 1228 | for (i = 0; i < num_ranges; i++) { |
| 1229 | const int j = i * 2; |
| 1230 | u32 ocr_mask; |
| 1231 | |
| 1232 | ocr_mask = mmc_vddrange_to_ocrmask( |
| 1233 | be32_to_cpu(voltage_ranges[j]), |
| 1234 | be32_to_cpu(voltage_ranges[j + 1])); |
| 1235 | if (!ocr_mask) { |
| 1236 | pr_err("%s: voltage-range #%d is invalid\n", |
| 1237 | np->full_name, i); |
| 1238 | return -EINVAL; |
| 1239 | } |
| 1240 | *mask |= ocr_mask; |
| 1241 | } |
| 1242 | |
| 1243 | return 0; |
| 1244 | } |
| 1245 | EXPORT_SYMBOL(mmc_of_parse_voltage); |
| 1246 | |
| 1247 | #endif /* CONFIG_OF */ |
| 1248 | |
Sascha Hauer | 25185f3 | 2014-06-30 11:07:25 +0200 | [diff] [blame] | 1249 | static int mmc_of_get_func_num(struct device_node *node) |
| 1250 | { |
| 1251 | u32 reg; |
| 1252 | int ret; |
| 1253 | |
| 1254 | ret = of_property_read_u32(node, "reg", ®); |
| 1255 | if (ret < 0) |
| 1256 | return ret; |
| 1257 | |
| 1258 | return reg; |
| 1259 | } |
| 1260 | |
| 1261 | struct device_node *mmc_of_find_child_device(struct mmc_host *host, |
| 1262 | unsigned func_num) |
| 1263 | { |
| 1264 | struct device_node *node; |
| 1265 | |
| 1266 | if (!host->parent || !host->parent->of_node) |
| 1267 | return NULL; |
| 1268 | |
| 1269 | for_each_child_of_node(host->parent->of_node, node) { |
| 1270 | if (mmc_of_get_func_num(node) == func_num) |
| 1271 | return node; |
| 1272 | } |
| 1273 | |
| 1274 | return NULL; |
| 1275 | } |
| 1276 | |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1277 | #ifdef CONFIG_REGULATOR |
| 1278 | |
| 1279 | /** |
| 1280 | * mmc_regulator_get_ocrmask - return mask of supported voltages |
| 1281 | * @supply: regulator to use |
| 1282 | * |
| 1283 | * This returns either a negative errno, or a mask of voltages that |
| 1284 | * can be provided to MMC/SD/SDIO devices using the specified voltage |
| 1285 | * regulator. This would normally be called before registering the |
| 1286 | * MMC host adapter. |
| 1287 | */ |
| 1288 | int mmc_regulator_get_ocrmask(struct regulator *supply) |
| 1289 | { |
| 1290 | int result = 0; |
| 1291 | int count; |
| 1292 | int i; |
Javier Martinez Canillas | 9ed7ca8 | 2014-08-14 14:39:00 +0200 | [diff] [blame] | 1293 | int vdd_uV; |
| 1294 | int vdd_mV; |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1295 | |
| 1296 | count = regulator_count_voltages(supply); |
| 1297 | if (count < 0) |
| 1298 | return count; |
| 1299 | |
| 1300 | for (i = 0; i < count; i++) { |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1301 | vdd_uV = regulator_list_voltage(supply, i); |
| 1302 | if (vdd_uV <= 0) |
| 1303 | continue; |
| 1304 | |
| 1305 | vdd_mV = vdd_uV / 1000; |
| 1306 | result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); |
| 1307 | } |
| 1308 | |
Javier Martinez Canillas | 9ed7ca8 | 2014-08-14 14:39:00 +0200 | [diff] [blame] | 1309 | if (!result) { |
| 1310 | vdd_uV = regulator_get_voltage(supply); |
| 1311 | if (vdd_uV <= 0) |
| 1312 | return vdd_uV; |
| 1313 | |
| 1314 | vdd_mV = vdd_uV / 1000; |
| 1315 | result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); |
| 1316 | } |
| 1317 | |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1318 | return result; |
| 1319 | } |
Chris Ball | 45a6b32 | 2012-06-11 09:39:12 -0400 | [diff] [blame] | 1320 | EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1321 | |
| 1322 | /** |
| 1323 | * mmc_regulator_set_ocr - set regulator to match host->ios voltage |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1324 | * @mmc: the host to regulate |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1325 | * @supply: regulator to use |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1326 | * @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] | 1327 | * |
| 1328 | * Returns zero on success, else negative errno. |
| 1329 | * |
| 1330 | * MMC host drivers may use this to enable or disable a regulator using |
| 1331 | * a particular supply voltage. This would normally be called from the |
| 1332 | * set_ios() method. |
| 1333 | */ |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1334 | int mmc_regulator_set_ocr(struct mmc_host *mmc, |
| 1335 | struct regulator *supply, |
| 1336 | unsigned short vdd_bit) |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1337 | { |
| 1338 | int result = 0; |
| 1339 | int min_uV, max_uV; |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1340 | |
| 1341 | if (vdd_bit) { |
| 1342 | int tmp; |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1343 | |
Chris Ball | 9cde5b7 | 2012-09-19 22:27:04 +0800 | [diff] [blame] | 1344 | /* |
| 1345 | * REVISIT mmc_vddrange_to_ocrmask() may have set some |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1346 | * bits this regulator doesn't quite support ... don't |
| 1347 | * be too picky, most cards and regulators are OK with |
| 1348 | * a 0.1V range goof (it's a small error percentage). |
| 1349 | */ |
| 1350 | tmp = vdd_bit - ilog2(MMC_VDD_165_195); |
| 1351 | if (tmp == 0) { |
| 1352 | min_uV = 1650 * 1000; |
| 1353 | max_uV = 1950 * 1000; |
| 1354 | } else { |
| 1355 | min_uV = 1900 * 1000 + tmp * 100 * 1000; |
| 1356 | max_uV = min_uV + 100 * 1000; |
| 1357 | } |
| 1358 | |
Tim Kryger | ca6429d | 2014-08-11 22:05:12 -0700 | [diff] [blame] | 1359 | result = regulator_set_voltage(supply, min_uV, max_uV); |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1360 | if (result == 0 && !mmc->regulator_enabled) { |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1361 | result = regulator_enable(supply); |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1362 | if (!result) |
| 1363 | mmc->regulator_enabled = true; |
| 1364 | } |
| 1365 | } else if (mmc->regulator_enabled) { |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1366 | result = regulator_disable(supply); |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1367 | if (result == 0) |
| 1368 | mmc->regulator_enabled = false; |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1369 | } |
| 1370 | |
Linus Walleij | 99fc513 | 2010-09-29 01:08:27 -0400 | [diff] [blame] | 1371 | if (result) |
| 1372 | dev_err(mmc_dev(mmc), |
| 1373 | "could not set regulator OCR (%d)\n", result); |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1374 | return result; |
| 1375 | } |
Chris Ball | 45a6b32 | 2012-06-11 09:39:12 -0400 | [diff] [blame] | 1376 | EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); |
David Brownell | 5c13941 | 2009-03-11 03:30:43 -0800 | [diff] [blame] | 1377 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1378 | #endif /* CONFIG_REGULATOR */ |
| 1379 | |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1380 | int mmc_regulator_get_supply(struct mmc_host *mmc) |
| 1381 | { |
| 1382 | struct device *dev = mmc_dev(mmc); |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1383 | int ret; |
| 1384 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1385 | mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc"); |
Mark Brown | bc35d5e | 2013-07-29 21:58:01 +0100 | [diff] [blame] | 1386 | mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc"); |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1387 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1388 | if (IS_ERR(mmc->supply.vmmc)) { |
| 1389 | if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER) |
| 1390 | return -EPROBE_DEFER; |
| 1391 | dev_info(dev, "No vmmc regulator found\n"); |
| 1392 | } else { |
| 1393 | ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc); |
| 1394 | if (ret > 0) |
| 1395 | mmc->ocr_avail = ret; |
| 1396 | else |
| 1397 | dev_warn(dev, "Failed getting OCR mask: %d\n", ret); |
| 1398 | } |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1399 | |
Tim Kryger | 4d1f52f | 2014-05-06 15:57:01 -0700 | [diff] [blame] | 1400 | if (IS_ERR(mmc->supply.vqmmc)) { |
| 1401 | if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER) |
| 1402 | return -EPROBE_DEFER; |
| 1403 | dev_info(dev, "No vqmmc regulator found\n"); |
| 1404 | } |
Guennadi Liakhovetski | e137788 | 2012-06-20 02:28:43 -0400 | [diff] [blame] | 1405 | |
| 1406 | return 0; |
| 1407 | } |
| 1408 | EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); |
| 1409 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1410 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | * Mask off any voltages we don't support and select |
| 1412 | * the lowest voltage |
| 1413 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1414 | u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | { |
| 1416 | int bit; |
| 1417 | |
Ulf Hansson | 726d6f2 | 2013-09-16 12:06:15 +0200 | [diff] [blame] | 1418 | /* |
| 1419 | * Sanity check the voltages that the card claims to |
| 1420 | * support. |
| 1421 | */ |
| 1422 | if (ocr & 0x7F) { |
| 1423 | dev_warn(mmc_dev(host), |
| 1424 | "card claims to support voltages below defined range\n"); |
| 1425 | ocr &= ~0x7F; |
| 1426 | } |
| 1427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | ocr &= host->ocr_avail; |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1429 | if (!ocr) { |
| 1430 | dev_warn(mmc_dev(host), "no support for card's volts\n"); |
| 1431 | return 0; |
| 1432 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1434 | if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { |
| 1435 | bit = ffs(ocr) - 1; |
Timo Teras | 63ef731 | 2006-11-02 19:43:27 +0100 | [diff] [blame] | 1436 | ocr &= 3 << bit; |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1437 | mmc_power_cycle(host, ocr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | } else { |
Ulf Hansson | ce69d37 | 2013-09-16 11:28:42 +0200 | [diff] [blame] | 1439 | bit = fls(ocr) - 1; |
| 1440 | ocr &= 3 << bit; |
| 1441 | if (bit != host->ios.vdd) |
| 1442 | dev_warn(mmc_dev(host), "exceeding card's volts\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | } |
| 1444 | |
| 1445 | return ocr; |
| 1446 | } |
| 1447 | |
Johan Rudholm | 567c890 | 2013-01-28 15:08:27 +0100 | [diff] [blame] | 1448 | int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) |
| 1449 | { |
| 1450 | int err = 0; |
| 1451 | int old_signal_voltage = host->ios.signal_voltage; |
| 1452 | |
| 1453 | host->ios.signal_voltage = signal_voltage; |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 1454 | if (host->ops->start_signal_voltage_switch) |
Johan Rudholm | 567c890 | 2013-01-28 15:08:27 +0100 | [diff] [blame] | 1455 | err = host->ops->start_signal_voltage_switch(host, &host->ios); |
Johan Rudholm | 567c890 | 2013-01-28 15:08:27 +0100 | [diff] [blame] | 1456 | |
| 1457 | if (err) |
| 1458 | host->ios.signal_voltage = old_signal_voltage; |
| 1459 | |
| 1460 | return err; |
| 1461 | |
| 1462 | } |
| 1463 | |
Ulf Hansson | 0f791fd | 2013-09-12 15:36:34 +0200 | [diff] [blame] | 1464 | 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] | 1465 | { |
| 1466 | struct mmc_command cmd = {0}; |
| 1467 | int err = 0; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1468 | u32 clock; |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1469 | |
| 1470 | BUG_ON(!host); |
| 1471 | |
| 1472 | /* |
| 1473 | * Send CMD11 only if the request is to switch the card to |
| 1474 | * 1.8V signalling. |
| 1475 | */ |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1476 | if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
| 1477 | return __mmc_set_signal_voltage(host, signal_voltage); |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1478 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1479 | /* |
| 1480 | * If we cannot switch voltages, return failure so the caller |
| 1481 | * can continue without UHS mode |
| 1482 | */ |
| 1483 | if (!host->ops->start_signal_voltage_switch) |
| 1484 | return -EPERM; |
| 1485 | if (!host->ops->card_busy) |
Joe Perches | 6606110 | 2014-09-12 14:56:56 -0700 | [diff] [blame] | 1486 | pr_warn("%s: cannot verify signal voltage switch\n", |
| 1487 | mmc_hostname(host)); |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1488 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1489 | cmd.opcode = SD_SWITCH_VOLTAGE; |
| 1490 | cmd.arg = 0; |
| 1491 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 1492 | |
| 1493 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 1494 | if (err) |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 1495 | return err; |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1496 | |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 1497 | if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) |
| 1498 | return -EIO; |
| 1499 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1500 | /* |
| 1501 | * The card should drive cmd and dat[0:3] low immediately |
| 1502 | * after the response of cmd11, but wait 1 ms to be sure |
| 1503 | */ |
| 1504 | mmc_delay(1); |
| 1505 | if (host->ops->card_busy && !host->ops->card_busy(host)) { |
| 1506 | err = -EAGAIN; |
| 1507 | goto power_cycle; |
| 1508 | } |
| 1509 | /* |
| 1510 | * During a signal voltage level switch, the clock must be gated |
| 1511 | * for 5 ms according to the SD spec |
| 1512 | */ |
| 1513 | clock = host->ios.clock; |
| 1514 | host->ios.clock = 0; |
| 1515 | mmc_set_ios(host); |
| 1516 | |
| 1517 | if (__mmc_set_signal_voltage(host, signal_voltage)) { |
| 1518 | /* |
| 1519 | * Voltages may not have been switched, but we've already |
| 1520 | * sent CMD11, so a power cycle is required anyway |
| 1521 | */ |
| 1522 | err = -EAGAIN; |
| 1523 | goto power_cycle; |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1524 | } |
| 1525 | |
Doug Anderson | 7c5209c | 2015-05-12 14:46:11 -0700 | [diff] [blame] | 1526 | /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ |
| 1527 | mmc_delay(10); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1528 | host->ios.clock = clock; |
| 1529 | mmc_set_ios(host); |
| 1530 | |
| 1531 | /* Wait for at least 1 ms according to spec */ |
| 1532 | mmc_delay(1); |
| 1533 | |
| 1534 | /* |
| 1535 | * Failure to switch is indicated by the card holding |
| 1536 | * dat[0:3] low |
| 1537 | */ |
| 1538 | if (host->ops->card_busy && host->ops->card_busy(host)) |
| 1539 | err = -EAGAIN; |
| 1540 | |
| 1541 | power_cycle: |
| 1542 | if (err) { |
| 1543 | pr_debug("%s: Signal voltage switch failed, " |
| 1544 | "power cycling card\n", mmc_hostname(host)); |
Ulf Hansson | 0f791fd | 2013-09-12 15:36:34 +0200 | [diff] [blame] | 1545 | mmc_power_cycle(host, ocr); |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1546 | } |
| 1547 | |
Johan Rudholm | 0797e5f | 2013-01-28 15:08:28 +0100 | [diff] [blame] | 1548 | return err; |
Arindam Nath | f2119df | 2011-05-05 12:18:57 +0530 | [diff] [blame] | 1549 | } |
| 1550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1552 | * Select timing parameters for host. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1554 | void mmc_set_timing(struct mmc_host *host, unsigned int timing) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1556 | host->ios.timing = timing; |
| 1557 | mmc_set_ios(host); |
Pierre Ossman | b57c43a | 2005-09-06 15:18:53 -0700 | [diff] [blame] | 1558 | } |
| 1559 | |
| 1560 | /* |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 1561 | * Select appropriate driver type for host. |
| 1562 | */ |
| 1563 | void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) |
| 1564 | { |
| 1565 | host->ios.drv_type = drv_type; |
| 1566 | mmc_set_ios(host); |
| 1567 | } |
| 1568 | |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 1569 | int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, |
| 1570 | int card_drv_type, int *drv_type) |
| 1571 | { |
| 1572 | struct mmc_host *host = card->host; |
| 1573 | int host_drv_type = SD_DRIVER_TYPE_B; |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 1574 | |
| 1575 | *drv_type = 0; |
| 1576 | |
| 1577 | if (!host->ops->select_drive_strength) |
| 1578 | return 0; |
| 1579 | |
| 1580 | /* Use SD definition of driver strength for hosts */ |
| 1581 | if (host->caps & MMC_CAP_DRIVER_TYPE_A) |
| 1582 | host_drv_type |= SD_DRIVER_TYPE_A; |
| 1583 | |
| 1584 | if (host->caps & MMC_CAP_DRIVER_TYPE_C) |
| 1585 | host_drv_type |= SD_DRIVER_TYPE_C; |
| 1586 | |
| 1587 | if (host->caps & MMC_CAP_DRIVER_TYPE_D) |
| 1588 | host_drv_type |= SD_DRIVER_TYPE_D; |
| 1589 | |
| 1590 | /* |
| 1591 | * The drive strength that the hardware can support |
| 1592 | * depends on the board design. Pass the appropriate |
| 1593 | * information and let the hardware specific code |
| 1594 | * return what is possible given the options |
| 1595 | */ |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 1596 | return host->ops->select_drive_strength(card, max_dtr, |
| 1597 | host_drv_type, |
| 1598 | card_drv_type, |
| 1599 | drv_type); |
Adrian Hunter | e23350b | 2015-02-06 14:12:55 +0200 | [diff] [blame] | 1600 | } |
| 1601 | |
Arindam Nath | d6d50a1 | 2011-05-05 12:18:59 +0530 | [diff] [blame] | 1602 | /* |
Russell King | 45f8245 | 2005-12-14 14:57:35 +0000 | [diff] [blame] | 1603 | * Apply power to the MMC stack. This is a two-stage process. |
| 1604 | * First, we enable power to the card without the clock running. |
| 1605 | * We then wait a bit for the power to stabilise. Finally, |
| 1606 | * enable the bus drivers and clock to the card. |
| 1607 | * |
| 1608 | * We must _NOT_ enable the clock prior to power stablising. |
| 1609 | * |
| 1610 | * If a host does all the power sequencing itself, ignore the |
| 1611 | * initial MMC_POWER_UP stage. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | */ |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1613 | void mmc_power_up(struct mmc_host *host, u32 ocr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 1615 | if (host->ios.power_mode == MMC_POWER_ON) |
| 1616 | return; |
| 1617 | |
Ulf Hansson | 3aa8793 | 2014-11-28 14:38:36 +0100 | [diff] [blame] | 1618 | mmc_pwrseq_pre_power_on(host); |
| 1619 | |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1620 | host->ios.vdd = fls(ocr) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | host->ios.power_mode = MMC_POWER_UP; |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1622 | /* Set initial state and call mmc_set_ios */ |
| 1623 | mmc_set_initial_state(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | |
Tim Kryger | ceae98f | 2014-04-24 14:44:26 -0700 | [diff] [blame] | 1625 | /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ |
| 1626 | if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330) == 0) |
| 1627 | dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); |
| 1628 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180) == 0) |
| 1629 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); |
| 1630 | else if (__mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120) == 0) |
| 1631 | dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); |
Aaron Lu | 108ecc4 | 2012-07-10 16:55:37 +0800 | [diff] [blame] | 1632 | |
Pierre Ossman | f9996ae | 2007-09-19 18:38:50 +0200 | [diff] [blame] | 1633 | /* |
| 1634 | * This delay should be sufficient to allow the power supply |
| 1635 | * to reach the minimum voltage. |
| 1636 | */ |
José M. Fernández | 79bccc5 | 2009-03-10 02:21:21 +0100 | [diff] [blame] | 1637 | mmc_delay(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | |
Ulf Hansson | 4febb7e | 2015-02-02 16:01:14 +0100 | [diff] [blame] | 1639 | mmc_pwrseq_post_power_on(host); |
| 1640 | |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 1641 | host->ios.clock = host->f_init; |
Sascha Hauer | 8dfd037 | 2009-04-09 08:32:02 +0200 | [diff] [blame] | 1642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | host->ios.power_mode = MMC_POWER_ON; |
Russell King | 920e70c | 2006-05-04 18:22:51 +0100 | [diff] [blame] | 1644 | mmc_set_ios(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | |
Pierre Ossman | f9996ae | 2007-09-19 18:38:50 +0200 | [diff] [blame] | 1646 | /* |
| 1647 | * This delay must be at least 74 clock sizes, or 1 ms, or the |
| 1648 | * time required to reach a stable voltage. |
| 1649 | */ |
José M. Fernández | 79bccc5 | 2009-03-10 02:21:21 +0100 | [diff] [blame] | 1650 | mmc_delay(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | } |
| 1652 | |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 1653 | void mmc_power_off(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 1655 | if (host->ios.power_mode == MMC_POWER_OFF) |
| 1656 | return; |
| 1657 | |
Ulf Hansson | 3aa8793 | 2014-11-28 14:38:36 +0100 | [diff] [blame] | 1658 | mmc_pwrseq_power_off(host); |
| 1659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | host->ios.clock = 0; |
| 1661 | host->ios.vdd = 0; |
Ulf Hansson | b33d46c | 2011-03-05 14:36:24 +0100 | [diff] [blame] | 1662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | host->ios.power_mode = MMC_POWER_OFF; |
Johan Rudholm | 2d079c4 | 2014-11-06 14:46:54 +0100 | [diff] [blame] | 1664 | /* Set initial state and call mmc_set_ios */ |
| 1665 | mmc_set_initial_state(host); |
Mika Westerberg | 778e277 | 2011-08-18 15:23:48 +0300 | [diff] [blame] | 1666 | |
Daniel Drake | 041beb1 | 2011-09-07 10:22:09 +0100 | [diff] [blame] | 1667 | /* |
| 1668 | * Some configurations, such as the 802.11 SDIO card in the OLPC |
| 1669 | * XO-1.5, require a short delay after poweroff before the card |
| 1670 | * can be successfully turned on again. |
| 1671 | */ |
| 1672 | mmc_delay(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | } |
| 1674 | |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1675 | void mmc_power_cycle(struct mmc_host *host, u32 ocr) |
Johan Rudholm | 276e090 | 2013-01-28 15:08:25 +0100 | [diff] [blame] | 1676 | { |
| 1677 | mmc_power_off(host); |
| 1678 | /* Wait at least 1 ms according to SD spec */ |
| 1679 | mmc_delay(1); |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 1680 | mmc_power_up(host, ocr); |
Johan Rudholm | 276e090 | 2013-01-28 15:08:25 +0100 | [diff] [blame] | 1681 | } |
| 1682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | /* |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 1684 | * Cleanup when the last reference to the bus operator is dropped. |
| 1685 | */ |
Adrian Bunk | 261172f | 2008-04-13 21:15:47 +0300 | [diff] [blame] | 1686 | static void __mmc_release_bus(struct mmc_host *host) |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 1687 | { |
| 1688 | BUG_ON(!host); |
| 1689 | BUG_ON(host->bus_refs); |
| 1690 | BUG_ON(!host->bus_dead); |
| 1691 | |
| 1692 | host->bus_ops = NULL; |
| 1693 | } |
| 1694 | |
| 1695 | /* |
| 1696 | * Increase reference count of bus operator |
| 1697 | */ |
| 1698 | static inline void mmc_bus_get(struct mmc_host *host) |
| 1699 | { |
| 1700 | unsigned long flags; |
| 1701 | |
| 1702 | spin_lock_irqsave(&host->lock, flags); |
| 1703 | host->bus_refs++; |
| 1704 | spin_unlock_irqrestore(&host->lock, flags); |
| 1705 | } |
| 1706 | |
| 1707 | /* |
| 1708 | * Decrease reference count of bus operator and free it if |
| 1709 | * it is the last reference. |
| 1710 | */ |
| 1711 | static inline void mmc_bus_put(struct mmc_host *host) |
| 1712 | { |
| 1713 | unsigned long flags; |
| 1714 | |
| 1715 | spin_lock_irqsave(&host->lock, flags); |
| 1716 | host->bus_refs--; |
| 1717 | if ((host->bus_refs == 0) && host->bus_ops) |
| 1718 | __mmc_release_bus(host); |
| 1719 | spin_unlock_irqrestore(&host->lock, flags); |
| 1720 | } |
| 1721 | |
| 1722 | /* |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1723 | * Assign a mmc bus handler to a host. Only one bus handler may control a |
| 1724 | * host at any given time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1726 | 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] | 1727 | { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1728 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1730 | BUG_ON(!host); |
| 1731 | BUG_ON(!ops); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1732 | |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 1733 | WARN_ON(!host->claimed); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1734 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1735 | spin_lock_irqsave(&host->lock, flags); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1736 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1737 | BUG_ON(host->bus_ops); |
| 1738 | BUG_ON(host->bus_refs); |
Pierre Ossman | b855885 | 2007-01-03 19:47:29 +0100 | [diff] [blame] | 1739 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1740 | host->bus_ops = ops; |
| 1741 | host->bus_refs = 1; |
| 1742 | host->bus_dead = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1744 | spin_unlock_irqrestore(&host->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | } |
| 1746 | |
| 1747 | /* |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 1748 | * Remove the current bus handler from a host. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | */ |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1750 | void mmc_detach_bus(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1752 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1754 | BUG_ON(!host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | |
Pierre Ossman | d84075c8 | 2007-08-09 13:23:56 +0200 | [diff] [blame] | 1756 | WARN_ON(!host->claimed); |
| 1757 | WARN_ON(!host->bus_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1759 | spin_lock_irqsave(&host->lock, flags); |
| 1760 | |
| 1761 | host->bus_dead = 1; |
| 1762 | |
| 1763 | spin_unlock_irqrestore(&host->lock, flags); |
| 1764 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 1765 | mmc_bus_put(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | } |
| 1767 | |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 1768 | static void _mmc_detect_change(struct mmc_host *host, unsigned long delay, |
| 1769 | bool cd_irq) |
| 1770 | { |
| 1771 | #ifdef CONFIG_MMC_DEBUG |
| 1772 | unsigned long flags; |
| 1773 | spin_lock_irqsave(&host->lock, flags); |
| 1774 | WARN_ON(host->removed); |
| 1775 | spin_unlock_irqrestore(&host->lock, flags); |
| 1776 | #endif |
| 1777 | |
| 1778 | /* |
| 1779 | * If the device is configured as wakeup, we prevent a new sleep for |
| 1780 | * 5 s to give provision for user space to consume the event. |
| 1781 | */ |
| 1782 | if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) && |
| 1783 | device_can_wakeup(mmc_dev(host))) |
| 1784 | pm_wakeup_event(mmc_dev(host), 5000); |
| 1785 | |
| 1786 | host->detect_change = 1; |
| 1787 | mmc_schedule_delayed_work(&host->detect, delay); |
| 1788 | } |
| 1789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | /** |
| 1791 | * mmc_detect_change - process change of state on a MMC socket |
| 1792 | * @host: host which changed state. |
Richard Purdie | 8dc0033 | 2005-09-08 17:53:01 +0100 | [diff] [blame] | 1793 | * @delay: optional delay to wait before detection (jiffies) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | * |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 1795 | * MMC drivers should call this when they detect a card has been |
| 1796 | * inserted or removed. The MMC layer will confirm that any |
| 1797 | * present card is still functional, and initialize any newly |
| 1798 | * inserted. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | */ |
Richard Purdie | 8dc0033 | 2005-09-08 17:53:01 +0100 | [diff] [blame] | 1800 | void mmc_detect_change(struct mmc_host *host, unsigned long delay) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | { |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 1802 | _mmc_detect_change(host, delay, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | EXPORT_SYMBOL(mmc_detect_change); |
| 1805 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1806 | void mmc_init_erase(struct mmc_card *card) |
| 1807 | { |
| 1808 | unsigned int sz; |
| 1809 | |
| 1810 | if (is_power_of_2(card->erase_size)) |
| 1811 | card->erase_shift = ffs(card->erase_size) - 1; |
| 1812 | else |
| 1813 | card->erase_shift = 0; |
| 1814 | |
| 1815 | /* |
| 1816 | * It is possible to erase an arbitrarily large area of an SD or MMC |
| 1817 | * card. That is not desirable because it can take a long time |
| 1818 | * (minutes) potentially delaying more important I/O, and also the |
| 1819 | * timeout calculations become increasingly hugely over-estimated. |
| 1820 | * Consequently, 'pref_erase' is defined as a guide to limit erases |
| 1821 | * to that size and alignment. |
| 1822 | * |
| 1823 | * For SD cards that define Allocation Unit size, limit erases to one |
| 1824 | * Allocation Unit at a time. For MMC cards that define High Capacity |
| 1825 | * Erase Size, whether it is switched on or not, limit to that size. |
| 1826 | * Otherwise just have a stab at a good value. For modern cards it |
| 1827 | * will end up being 4MiB. Note that if the value is too small, it |
| 1828 | * can end up taking longer to erase. |
| 1829 | */ |
| 1830 | if (mmc_card_sd(card) && card->ssr.au) { |
| 1831 | card->pref_erase = card->ssr.au; |
| 1832 | card->erase_shift = ffs(card->ssr.au) - 1; |
| 1833 | } else if (card->ext_csd.hc_erase_size) { |
| 1834 | card->pref_erase = card->ext_csd.hc_erase_size; |
Chuanxiao Dong | cc8aa7d | 2014-08-14 18:29:24 +0800 | [diff] [blame] | 1835 | } else if (card->erase_size) { |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1836 | sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; |
| 1837 | if (sz < 128) |
| 1838 | card->pref_erase = 512 * 1024 / 512; |
| 1839 | else if (sz < 512) |
| 1840 | card->pref_erase = 1024 * 1024 / 512; |
| 1841 | else if (sz < 1024) |
| 1842 | card->pref_erase = 2 * 1024 * 1024 / 512; |
| 1843 | else |
| 1844 | card->pref_erase = 4 * 1024 * 1024 / 512; |
| 1845 | if (card->pref_erase < card->erase_size) |
| 1846 | card->pref_erase = card->erase_size; |
| 1847 | else { |
| 1848 | sz = card->pref_erase % card->erase_size; |
| 1849 | if (sz) |
| 1850 | card->pref_erase += card->erase_size - sz; |
| 1851 | } |
Chuanxiao Dong | cc8aa7d | 2014-08-14 18:29:24 +0800 | [diff] [blame] | 1852 | } else |
| 1853 | card->pref_erase = 0; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1854 | } |
| 1855 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1856 | static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, |
| 1857 | unsigned int arg, unsigned int qty) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1858 | { |
| 1859 | unsigned int erase_timeout; |
| 1860 | |
Adrian Hunter | 7194efb | 2012-04-05 14:45:47 +0300 | [diff] [blame] | 1861 | if (arg == MMC_DISCARD_ARG || |
| 1862 | (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) { |
| 1863 | erase_timeout = card->ext_csd.trim_timeout; |
| 1864 | } else if (card->ext_csd.erase_group_def & 1) { |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1865 | /* High Capacity Erase Group Size uses HC timeouts */ |
| 1866 | if (arg == MMC_TRIM_ARG) |
| 1867 | erase_timeout = card->ext_csd.trim_timeout; |
| 1868 | else |
| 1869 | erase_timeout = card->ext_csd.hc_erase_timeout; |
| 1870 | } else { |
| 1871 | /* CSD Erase Group Size uses write timeout */ |
| 1872 | unsigned int mult = (10 << card->csd.r2w_factor); |
| 1873 | unsigned int timeout_clks = card->csd.tacc_clks * mult; |
| 1874 | unsigned int timeout_us; |
| 1875 | |
| 1876 | /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ |
| 1877 | if (card->csd.tacc_ns < 1000000) |
| 1878 | timeout_us = (card->csd.tacc_ns * mult) / 1000; |
| 1879 | else |
| 1880 | timeout_us = (card->csd.tacc_ns / 1000) * mult; |
| 1881 | |
| 1882 | /* |
| 1883 | * ios.clock is only a target. The real clock rate might be |
| 1884 | * less but not that much less, so fudge it by multiplying by 2. |
| 1885 | */ |
| 1886 | timeout_clks <<= 1; |
| 1887 | timeout_us += (timeout_clks * 1000) / |
Ulf Hansson | 9eadcc0 | 2015-10-02 10:56:11 +0200 | [diff] [blame^] | 1888 | (card->host->ios.clock / 1000); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1889 | |
| 1890 | erase_timeout = timeout_us / 1000; |
| 1891 | |
| 1892 | /* |
| 1893 | * Theoretically, the calculation could underflow so round up |
| 1894 | * to 1ms in that case. |
| 1895 | */ |
| 1896 | if (!erase_timeout) |
| 1897 | erase_timeout = 1; |
| 1898 | } |
| 1899 | |
| 1900 | /* Multiplier for secure operations */ |
| 1901 | if (arg & MMC_SECURE_ARGS) { |
| 1902 | if (arg == MMC_SECURE_ERASE_ARG) |
| 1903 | erase_timeout *= card->ext_csd.sec_erase_mult; |
| 1904 | else |
| 1905 | erase_timeout *= card->ext_csd.sec_trim_mult; |
| 1906 | } |
| 1907 | |
| 1908 | erase_timeout *= qty; |
| 1909 | |
| 1910 | /* |
| 1911 | * Ensure at least a 1 second timeout for SPI as per |
| 1912 | * 'mmc_set_data_timeout()' |
| 1913 | */ |
| 1914 | if (mmc_host_is_spi(card->host) && erase_timeout < 1000) |
| 1915 | erase_timeout = 1000; |
| 1916 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1917 | return erase_timeout; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1918 | } |
| 1919 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1920 | static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, |
| 1921 | unsigned int arg, |
| 1922 | unsigned int qty) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1923 | { |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1924 | unsigned int erase_timeout; |
| 1925 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1926 | if (card->ssr.erase_timeout) { |
| 1927 | /* Erase timeout specified in SD Status Register (SSR) */ |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1928 | erase_timeout = card->ssr.erase_timeout * qty + |
| 1929 | card->ssr.erase_offset; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1930 | } else { |
| 1931 | /* |
| 1932 | * Erase timeout not specified in SD Status Register (SSR) so |
| 1933 | * use 250ms per write block. |
| 1934 | */ |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1935 | erase_timeout = 250 * qty; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1936 | } |
| 1937 | |
| 1938 | /* Must not be less than 1 second */ |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1939 | if (erase_timeout < 1000) |
| 1940 | erase_timeout = 1000; |
| 1941 | |
| 1942 | return erase_timeout; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1943 | } |
| 1944 | |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1945 | static unsigned int mmc_erase_timeout(struct mmc_card *card, |
| 1946 | unsigned int arg, |
| 1947 | unsigned int qty) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1948 | { |
| 1949 | if (mmc_card_sd(card)) |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1950 | return mmc_sd_erase_timeout(card, arg, qty); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1951 | else |
Andrei Warkentin | eaa02f7 | 2011-04-11 16:13:41 -0500 | [diff] [blame] | 1952 | return mmc_mmc_erase_timeout(card, arg, qty); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1953 | } |
| 1954 | |
| 1955 | static int mmc_do_erase(struct mmc_card *card, unsigned int from, |
| 1956 | unsigned int to, unsigned int arg) |
| 1957 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 1958 | struct mmc_command cmd = {0}; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1959 | unsigned int qty = 0; |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 1960 | unsigned long timeout; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1961 | int err; |
| 1962 | |
Adrian Hunter | 8f11d10 | 2015-05-07 13:10:16 +0300 | [diff] [blame] | 1963 | mmc_retune_hold(card->host); |
| 1964 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1965 | /* |
| 1966 | * qty is used to calculate the erase timeout which depends on how many |
| 1967 | * erase groups (or allocation units in SD terminology) are affected. |
| 1968 | * We count erasing part of an erase group as one erase group. |
| 1969 | * For SD, the allocation units are always a power of 2. For MMC, the |
| 1970 | * erase group size is almost certainly also power of 2, but it does not |
| 1971 | * seem to insist on that in the JEDEC standard, so we fall back to |
| 1972 | * division in that case. SD may not specify an allocation unit size, |
| 1973 | * in which case the timeout is based on the number of write blocks. |
| 1974 | * |
| 1975 | * Note that the timeout for secure trim 2 will only be correct if the |
| 1976 | * number of erase groups specified is the same as the total of all |
| 1977 | * preceding secure trim 1 commands. Since the power may have been |
| 1978 | * lost since the secure trim 1 commands occurred, it is generally |
| 1979 | * impossible to calculate the secure trim 2 timeout correctly. |
| 1980 | */ |
| 1981 | if (card->erase_shift) |
| 1982 | qty += ((to >> card->erase_shift) - |
| 1983 | (from >> card->erase_shift)) + 1; |
| 1984 | else if (mmc_card_sd(card)) |
| 1985 | qty += to - from + 1; |
| 1986 | else |
| 1987 | qty += ((to / card->erase_size) - |
| 1988 | (from / card->erase_size)) + 1; |
| 1989 | |
| 1990 | if (!mmc_card_blockaddr(card)) { |
| 1991 | from <<= 9; |
| 1992 | to <<= 9; |
| 1993 | } |
| 1994 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 1995 | if (mmc_card_sd(card)) |
| 1996 | cmd.opcode = SD_ERASE_WR_BLK_START; |
| 1997 | else |
| 1998 | cmd.opcode = MMC_ERASE_GROUP_START; |
| 1999 | cmd.arg = from; |
| 2000 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2001 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2002 | if (err) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2003 | pr_err("mmc_erase: group start error %d, " |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2004 | "status %#x\n", err, cmd.resp[0]); |
Adrian Hunter | 6771632 | 2011-08-29 16:42:15 +0300 | [diff] [blame] | 2005 | err = -EIO; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2006 | goto out; |
| 2007 | } |
| 2008 | |
| 2009 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 2010 | if (mmc_card_sd(card)) |
| 2011 | cmd.opcode = SD_ERASE_WR_BLK_END; |
| 2012 | else |
| 2013 | cmd.opcode = MMC_ERASE_GROUP_END; |
| 2014 | cmd.arg = to; |
| 2015 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2016 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2017 | if (err) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2018 | pr_err("mmc_erase: group end error %d, status %#x\n", |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2019 | err, cmd.resp[0]); |
Adrian Hunter | 6771632 | 2011-08-29 16:42:15 +0300 | [diff] [blame] | 2020 | err = -EIO; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2021 | goto out; |
| 2022 | } |
| 2023 | |
| 2024 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 2025 | cmd.opcode = MMC_ERASE; |
| 2026 | cmd.arg = arg; |
| 2027 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
Ulf Hansson | 1d4d774 | 2014-01-08 15:06:08 +0100 | [diff] [blame] | 2028 | cmd.busy_timeout = mmc_erase_timeout(card, arg, qty); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2029 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2030 | if (err) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2031 | pr_err("mmc_erase: erase error %d, status %#x\n", |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2032 | err, cmd.resp[0]); |
| 2033 | err = -EIO; |
| 2034 | goto out; |
| 2035 | } |
| 2036 | |
| 2037 | if (mmc_host_is_spi(card->host)) |
| 2038 | goto out; |
| 2039 | |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 2040 | timeout = jiffies + msecs_to_jiffies(MMC_CORE_TIMEOUT_MS); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2041 | do { |
| 2042 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 2043 | cmd.opcode = MMC_SEND_STATUS; |
| 2044 | cmd.arg = card->rca << 16; |
| 2045 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 2046 | /* Do not retry else we can't see errors */ |
| 2047 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 2048 | if (err || (cmd.resp[0] & 0xFDF92000)) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 2049 | pr_err("error %d requesting status %#x\n", |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2050 | err, cmd.resp[0]); |
| 2051 | err = -EIO; |
| 2052 | goto out; |
| 2053 | } |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 2054 | |
| 2055 | /* Timeout if the device never becomes ready for data and |
| 2056 | * never leaves the program state. |
| 2057 | */ |
| 2058 | if (time_after(jiffies, timeout)) { |
| 2059 | pr_err("%s: Card stuck in programming state! %s\n", |
| 2060 | mmc_hostname(card->host), __func__); |
| 2061 | err = -EIO; |
| 2062 | goto out; |
| 2063 | } |
| 2064 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2065 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 2066 | (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2067 | out: |
Adrian Hunter | 8f11d10 | 2015-05-07 13:10:16 +0300 | [diff] [blame] | 2068 | mmc_retune_release(card->host); |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2069 | return err; |
| 2070 | } |
| 2071 | |
| 2072 | /** |
| 2073 | * mmc_erase - erase sectors. |
| 2074 | * @card: card to erase |
| 2075 | * @from: first sector to erase |
| 2076 | * @nr: number of sectors to erase |
| 2077 | * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) |
| 2078 | * |
| 2079 | * Caller must claim host before calling this function. |
| 2080 | */ |
| 2081 | int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, |
| 2082 | unsigned int arg) |
| 2083 | { |
| 2084 | unsigned int rem, to = from + nr; |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2085 | int err; |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2086 | |
| 2087 | if (!(card->host->caps & MMC_CAP_ERASE) || |
| 2088 | !(card->csd.cmdclass & CCC_ERASE)) |
| 2089 | return -EOPNOTSUPP; |
| 2090 | |
| 2091 | if (!card->erase_size) |
| 2092 | return -EOPNOTSUPP; |
| 2093 | |
| 2094 | if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) |
| 2095 | return -EOPNOTSUPP; |
| 2096 | |
| 2097 | if ((arg & MMC_SECURE_ARGS) && |
| 2098 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) |
| 2099 | return -EOPNOTSUPP; |
| 2100 | |
| 2101 | if ((arg & MMC_TRIM_ARGS) && |
| 2102 | !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) |
| 2103 | return -EOPNOTSUPP; |
| 2104 | |
| 2105 | if (arg == MMC_SECURE_ERASE_ARG) { |
| 2106 | if (from % card->erase_size || nr % card->erase_size) |
| 2107 | return -EINVAL; |
| 2108 | } |
| 2109 | |
| 2110 | if (arg == MMC_ERASE_ARG) { |
| 2111 | rem = from % card->erase_size; |
| 2112 | if (rem) { |
| 2113 | rem = card->erase_size - rem; |
| 2114 | from += rem; |
| 2115 | if (nr > rem) |
| 2116 | nr -= rem; |
| 2117 | else |
| 2118 | return 0; |
| 2119 | } |
| 2120 | rem = nr % card->erase_size; |
| 2121 | if (rem) |
| 2122 | nr -= rem; |
| 2123 | } |
| 2124 | |
| 2125 | if (nr == 0) |
| 2126 | return 0; |
| 2127 | |
| 2128 | to = from + nr; |
| 2129 | |
| 2130 | if (to <= from) |
| 2131 | return -EINVAL; |
| 2132 | |
| 2133 | /* 'from' and 'to' are inclusive */ |
| 2134 | to -= 1; |
| 2135 | |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2136 | /* |
| 2137 | * Special case where only one erase-group fits in the timeout budget: |
| 2138 | * If the region crosses an erase-group boundary on this particular |
| 2139 | * case, we will be trimming more than one erase-group which, does not |
| 2140 | * fit in the timeout budget of the controller, so we need to split it |
| 2141 | * and call mmc_do_erase() twice if necessary. This special case is |
| 2142 | * identified by the card->eg_boundary flag. |
| 2143 | */ |
Robin van der Gracht | 22d7e85 | 2015-08-04 08:58:33 +0200 | [diff] [blame] | 2144 | rem = card->erase_size - (from % card->erase_size); |
| 2145 | if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) { |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2146 | err = mmc_do_erase(card, from, from + rem - 1, arg); |
| 2147 | from += rem; |
| 2148 | if ((err) || (to <= from)) |
| 2149 | return err; |
| 2150 | } |
| 2151 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2152 | return mmc_do_erase(card, from, to, arg); |
| 2153 | } |
| 2154 | EXPORT_SYMBOL(mmc_erase); |
| 2155 | |
| 2156 | int mmc_can_erase(struct mmc_card *card) |
| 2157 | { |
| 2158 | if ((card->host->caps & MMC_CAP_ERASE) && |
| 2159 | (card->csd.cmdclass & CCC_ERASE) && card->erase_size) |
| 2160 | return 1; |
| 2161 | return 0; |
| 2162 | } |
| 2163 | EXPORT_SYMBOL(mmc_can_erase); |
| 2164 | |
| 2165 | int mmc_can_trim(struct mmc_card *card) |
| 2166 | { |
Shawn Lin | b5b4ff0 | 2015-08-12 13:08:32 +0800 | [diff] [blame] | 2167 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && |
| 2168 | (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2169 | return 1; |
| 2170 | return 0; |
| 2171 | } |
| 2172 | EXPORT_SYMBOL(mmc_can_trim); |
| 2173 | |
Kyungmin Park | b3bf915 | 2011-10-18 09:34:04 +0900 | [diff] [blame] | 2174 | int mmc_can_discard(struct mmc_card *card) |
| 2175 | { |
| 2176 | /* |
| 2177 | * As there's no way to detect the discard support bit at v4.5 |
| 2178 | * use the s/w feature support filed. |
| 2179 | */ |
| 2180 | if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) |
| 2181 | return 1; |
| 2182 | return 0; |
| 2183 | } |
| 2184 | EXPORT_SYMBOL(mmc_can_discard); |
| 2185 | |
Kyungmin Park | d9ddd62 | 2011-10-14 14:15:48 +0900 | [diff] [blame] | 2186 | int mmc_can_sanitize(struct mmc_card *card) |
| 2187 | { |
Adrian Hunter | 2830281 | 2012-04-05 14:45:48 +0300 | [diff] [blame] | 2188 | if (!mmc_can_trim(card) && !mmc_can_erase(card)) |
| 2189 | return 0; |
Kyungmin Park | d9ddd62 | 2011-10-14 14:15:48 +0900 | [diff] [blame] | 2190 | if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) |
| 2191 | return 1; |
| 2192 | return 0; |
| 2193 | } |
| 2194 | EXPORT_SYMBOL(mmc_can_sanitize); |
| 2195 | |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2196 | int mmc_can_secure_erase_trim(struct mmc_card *card) |
| 2197 | { |
Lukas Czerner | 5204d00 | 2014-06-18 13:18:07 +0200 | [diff] [blame] | 2198 | if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && |
| 2199 | !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)) |
Adrian Hunter | dfe86cb | 2010-08-11 14:17:46 -0700 | [diff] [blame] | 2200 | return 1; |
| 2201 | return 0; |
| 2202 | } |
| 2203 | EXPORT_SYMBOL(mmc_can_secure_erase_trim); |
| 2204 | |
| 2205 | int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, |
| 2206 | unsigned int nr) |
| 2207 | { |
| 2208 | if (!card->erase_size) |
| 2209 | return 0; |
| 2210 | if (from % card->erase_size || nr % card->erase_size) |
| 2211 | return 0; |
| 2212 | return 1; |
| 2213 | } |
| 2214 | EXPORT_SYMBOL(mmc_erase_group_aligned); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2216 | static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, |
| 2217 | unsigned int arg) |
| 2218 | { |
| 2219 | struct mmc_host *host = card->host; |
| 2220 | unsigned int max_discard, x, y, qty = 0, max_qty, timeout; |
| 2221 | unsigned int last_timeout = 0; |
| 2222 | |
| 2223 | if (card->erase_shift) |
| 2224 | max_qty = UINT_MAX >> card->erase_shift; |
| 2225 | else if (mmc_card_sd(card)) |
| 2226 | max_qty = UINT_MAX; |
| 2227 | else |
| 2228 | max_qty = UINT_MAX / card->erase_size; |
| 2229 | |
| 2230 | /* Find the largest qty with an OK timeout */ |
| 2231 | do { |
| 2232 | y = 0; |
| 2233 | for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { |
| 2234 | timeout = mmc_erase_timeout(card, arg, qty + x); |
Ulf Hansson | 68eb80e | 2013-12-18 09:57:38 +0100 | [diff] [blame] | 2235 | if (timeout > host->max_busy_timeout) |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2236 | break; |
| 2237 | if (timeout < last_timeout) |
| 2238 | break; |
| 2239 | last_timeout = timeout; |
| 2240 | y = x; |
| 2241 | } |
| 2242 | qty += y; |
| 2243 | } while (y); |
| 2244 | |
| 2245 | if (!qty) |
| 2246 | return 0; |
| 2247 | |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2248 | /* |
| 2249 | * When specifying a sector range to trim, chances are we might cross |
| 2250 | * an erase-group boundary even if the amount of sectors is less than |
| 2251 | * one erase-group. |
| 2252 | * If we can only fit one erase-group in the controller timeout budget, |
| 2253 | * we have to care that erase-group boundaries are not crossed by a |
| 2254 | * single trim operation. We flag that special case with "eg_boundary". |
| 2255 | * In all other cases we can just decrement qty and pretend that we |
| 2256 | * always touch (qty + 1) erase-groups as a simple optimization. |
| 2257 | */ |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2258 | if (qty == 1) |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2259 | card->eg_boundary = 1; |
| 2260 | else |
| 2261 | qty--; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2262 | |
| 2263 | /* Convert qty to sectors */ |
| 2264 | if (card->erase_shift) |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2265 | max_discard = qty << card->erase_shift; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2266 | else if (mmc_card_sd(card)) |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2267 | max_discard = qty + 1; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2268 | else |
David Jander | 642c28a | 2015-06-23 11:43:52 +0200 | [diff] [blame] | 2269 | max_discard = qty * card->erase_size; |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2270 | |
| 2271 | return max_discard; |
| 2272 | } |
| 2273 | |
| 2274 | unsigned int mmc_calc_max_discard(struct mmc_card *card) |
| 2275 | { |
| 2276 | struct mmc_host *host = card->host; |
| 2277 | unsigned int max_discard, max_trim; |
| 2278 | |
Ulf Hansson | 68eb80e | 2013-12-18 09:57:38 +0100 | [diff] [blame] | 2279 | if (!host->max_busy_timeout) |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2280 | return UINT_MAX; |
| 2281 | |
| 2282 | /* |
| 2283 | * Without erase_group_def set, MMC erase timeout depends on clock |
| 2284 | * frequence which can change. In that case, the best choice is |
| 2285 | * just the preferred erase size. |
| 2286 | */ |
| 2287 | if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1)) |
| 2288 | return card->pref_erase; |
| 2289 | |
| 2290 | max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); |
| 2291 | if (mmc_can_trim(card)) { |
| 2292 | max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); |
| 2293 | if (max_trim < max_discard) |
| 2294 | max_discard = max_trim; |
| 2295 | } else if (max_discard < card->erase_size) { |
| 2296 | max_discard = 0; |
| 2297 | } |
| 2298 | pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", |
Ulf Hansson | 68eb80e | 2013-12-18 09:57:38 +0100 | [diff] [blame] | 2299 | mmc_hostname(host), max_discard, host->max_busy_timeout); |
Adrian Hunter | e056a1b | 2011-06-28 17:16:02 +0300 | [diff] [blame] | 2300 | return max_discard; |
| 2301 | } |
| 2302 | EXPORT_SYMBOL(mmc_calc_max_discard); |
| 2303 | |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2304 | int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) |
| 2305 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 2306 | struct mmc_command cmd = {0}; |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2307 | |
Seungwon Jeon | cdc9917 | 2014-04-23 17:07:35 +0900 | [diff] [blame] | 2308 | if (mmc_card_blockaddr(card) || mmc_card_ddr52(card)) |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2309 | return 0; |
| 2310 | |
Adrian Hunter | 0f8d8ea | 2010-08-24 13:20:26 +0300 | [diff] [blame] | 2311 | cmd.opcode = MMC_SET_BLOCKLEN; |
| 2312 | cmd.arg = blocklen; |
| 2313 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2314 | return mmc_wait_for_cmd(card->host, &cmd, 5); |
| 2315 | } |
| 2316 | EXPORT_SYMBOL(mmc_set_blocklen); |
| 2317 | |
Loic Pallardy | 67c79db | 2012-08-06 17:12:30 +0200 | [diff] [blame] | 2318 | int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, |
| 2319 | bool is_rel_write) |
| 2320 | { |
| 2321 | struct mmc_command cmd = {0}; |
| 2322 | |
| 2323 | cmd.opcode = MMC_SET_BLOCK_COUNT; |
| 2324 | cmd.arg = blockcount & 0x0000FFFF; |
| 2325 | if (is_rel_write) |
| 2326 | cmd.arg |= 1 << 31; |
| 2327 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
| 2328 | return mmc_wait_for_cmd(card->host, &cmd, 5); |
| 2329 | } |
| 2330 | EXPORT_SYMBOL(mmc_set_blockcount); |
| 2331 | |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2332 | static void mmc_hw_reset_for_init(struct mmc_host *host) |
| 2333 | { |
| 2334 | if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) |
| 2335 | return; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2336 | host->ops->hw_reset(host); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2337 | } |
| 2338 | |
Johan Rudholm | 83533ab | 2015-01-12 15:38:04 +0100 | [diff] [blame] | 2339 | int mmc_hw_reset(struct mmc_host *host) |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2340 | { |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2341 | int ret; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2342 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2343 | if (!host->card) |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2344 | return -EINVAL; |
| 2345 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2346 | mmc_bus_get(host); |
| 2347 | if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) { |
| 2348 | mmc_bus_put(host); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2349 | return -EOPNOTSUPP; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2350 | } |
| 2351 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2352 | ret = host->bus_ops->reset(host); |
| 2353 | mmc_bus_put(host); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2354 | |
Adrian Hunter | 0250fdf | 2015-05-07 13:10:25 +0300 | [diff] [blame] | 2355 | if (ret != -EOPNOTSUPP) |
| 2356 | pr_warn("%s: tried to reset card\n", mmc_hostname(host)); |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2357 | |
Johan Rudholm | f855a37 | 2015-01-12 15:38:05 +0100 | [diff] [blame] | 2358 | return ret; |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2359 | } |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2360 | EXPORT_SYMBOL(mmc_hw_reset); |
| 2361 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2362 | static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) |
| 2363 | { |
| 2364 | host->f_init = freq; |
| 2365 | |
| 2366 | #ifdef CONFIG_MMC_DEBUG |
| 2367 | pr_info("%s: %s: trying to init card at %u Hz\n", |
| 2368 | mmc_hostname(host), __func__, host->f_init); |
| 2369 | #endif |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 2370 | mmc_power_up(host, host->ocr_avail); |
Philip Rakity | 2f94e55 | 2011-02-13 23:12:28 -0800 | [diff] [blame] | 2371 | |
| 2372 | /* |
Adrian Hunter | b249951 | 2011-08-29 16:42:11 +0300 | [diff] [blame] | 2373 | * Some eMMCs (with VCCQ always on) may not be reset after power up, so |
| 2374 | * do a hardware reset if possible. |
| 2375 | */ |
| 2376 | mmc_hw_reset_for_init(host); |
| 2377 | |
| 2378 | /* |
Philip Rakity | 2f94e55 | 2011-02-13 23:12:28 -0800 | [diff] [blame] | 2379 | * sdio_reset sends CMD52 to reset card. Since we do not know |
| 2380 | * if the card is being re-initialized, just send it. CMD52 |
| 2381 | * should be ignored by SD/eMMC cards. |
| 2382 | */ |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2383 | sdio_reset(host); |
| 2384 | mmc_go_idle(host); |
| 2385 | |
| 2386 | mmc_send_if_cond(host, host->ocr_avail); |
| 2387 | |
| 2388 | /* Order's important: probe SDIO, then SD, then MMC */ |
| 2389 | if (!mmc_attach_sdio(host)) |
| 2390 | return 0; |
| 2391 | if (!mmc_attach_sd(host)) |
| 2392 | return 0; |
| 2393 | if (!mmc_attach_mmc(host)) |
| 2394 | return 0; |
| 2395 | |
| 2396 | mmc_power_off(host); |
| 2397 | return -EIO; |
| 2398 | } |
| 2399 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2400 | int _mmc_detect_card_removed(struct mmc_host *host) |
| 2401 | { |
| 2402 | int ret; |
| 2403 | |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2404 | if (host->caps & MMC_CAP_NONREMOVABLE) |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2405 | return 0; |
| 2406 | |
| 2407 | if (!host->card || mmc_card_removed(host->card)) |
| 2408 | return 1; |
| 2409 | |
| 2410 | ret = host->bus_ops->alive(host); |
Kevin Liu | 1450734 | 2013-02-28 15:29:29 +0800 | [diff] [blame] | 2411 | |
| 2412 | /* |
| 2413 | * Card detect status and alive check may be out of sync if card is |
| 2414 | * removed slowly, when card detect switch changes while card/slot |
| 2415 | * pads are still contacted in hardware (refer to "SD Card Mechanical |
| 2416 | * Addendum, Appendix C: Card Detection Switch"). So reschedule a |
| 2417 | * detect work 200ms later for this case. |
| 2418 | */ |
| 2419 | if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) { |
| 2420 | mmc_detect_change(host, msecs_to_jiffies(200)); |
| 2421 | pr_debug("%s: card removed too slowly\n", mmc_hostname(host)); |
| 2422 | } |
| 2423 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2424 | if (ret) { |
| 2425 | mmc_card_set_removed(host->card); |
| 2426 | pr_debug("%s: card remove detected\n", mmc_hostname(host)); |
| 2427 | } |
| 2428 | |
| 2429 | return ret; |
| 2430 | } |
| 2431 | |
| 2432 | int mmc_detect_card_removed(struct mmc_host *host) |
| 2433 | { |
| 2434 | struct mmc_card *card = host->card; |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2435 | int ret; |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2436 | |
| 2437 | WARN_ON(!host->claimed); |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2438 | |
| 2439 | if (!card) |
| 2440 | return 1; |
| 2441 | |
| 2442 | ret = mmc_card_removed(card); |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2443 | /* |
| 2444 | * The card will be considered unchanged unless we have been asked to |
| 2445 | * detect a change or host requires polling to provide card detection. |
| 2446 | */ |
Ulf Hansson | b689167 | 2013-04-18 11:02:07 +0200 | [diff] [blame] | 2447 | if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL)) |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2448 | return ret; |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2449 | |
| 2450 | host->detect_change = 0; |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2451 | if (!ret) { |
| 2452 | ret = _mmc_detect_card_removed(host); |
Ulf Hansson | b689167 | 2013-04-18 11:02:07 +0200 | [diff] [blame] | 2453 | if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) { |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2454 | /* |
| 2455 | * Schedule a detect work as soon as possible to let a |
| 2456 | * rescan handle the card removal. |
| 2457 | */ |
| 2458 | cancel_delayed_work(&host->detect); |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 2459 | _mmc_detect_change(host, 0, false); |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2460 | } |
| 2461 | } |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2462 | |
Ulf Hansson | f0cc9cf | 2012-02-06 10:42:39 +0100 | [diff] [blame] | 2463 | return ret; |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2464 | } |
| 2465 | EXPORT_SYMBOL(mmc_detect_card_removed); |
| 2466 | |
Pierre Ossman | b93931a | 2007-05-19 14:06:24 +0200 | [diff] [blame] | 2467 | void mmc_rescan(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2469 | struct mmc_host *host = |
| 2470 | container_of(work, struct mmc_host, detect.work); |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 2471 | int i; |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2472 | |
Markus Mayer | fa372a5 | 2014-04-08 15:19:43 -0700 | [diff] [blame] | 2473 | if (host->trigger_card_event && host->ops->card_event) { |
| 2474 | host->ops->card_event(host); |
| 2475 | host->trigger_card_event = false; |
| 2476 | } |
| 2477 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2478 | if (host->rescan_disable) |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2479 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2480 | |
Johan Rudholm | 3339d1e | 2012-08-23 13:40:55 +0200 | [diff] [blame] | 2481 | /* If there is a non-removable card registered, only scan once */ |
| 2482 | if ((host->caps & MMC_CAP_NONREMOVABLE) && host->rescan_entered) |
| 2483 | return; |
| 2484 | host->rescan_entered = 1; |
| 2485 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2486 | mmc_bus_get(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | |
Ohad Ben-Cohen | 30201e7 | 2010-11-28 07:21:28 +0200 | [diff] [blame] | 2488 | /* |
| 2489 | * if there is a _removable_ card registered, check whether it is |
| 2490 | * still present |
| 2491 | */ |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2492 | if (host->bus_ops && !host->bus_dead |
Ohad Ben-Cohen | bad3bab | 2011-03-08 23:32:02 +0200 | [diff] [blame] | 2493 | && !(host->caps & MMC_CAP_NONREMOVABLE)) |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2494 | host->bus_ops->detect(host); |
| 2495 | |
Adrian Hunter | d304950 | 2011-11-28 16:22:00 +0200 | [diff] [blame] | 2496 | host->detect_change = 0; |
| 2497 | |
Chris Ball | c584179 | 2011-01-04 12:20:22 -0500 | [diff] [blame] | 2498 | /* |
| 2499 | * Let mmc_bus_put() free the bus/bus_ops if we've found that |
| 2500 | * the card is no longer present. |
| 2501 | */ |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2502 | mmc_bus_put(host); |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2503 | mmc_bus_get(host); |
| 2504 | |
| 2505 | /* if there still is a card present, stop here */ |
| 2506 | if (host->bus_ops != NULL) { |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2507 | mmc_bus_put(host); |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2508 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | } |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2510 | |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2511 | /* |
| 2512 | * Only we can add a new handler, so it's safe to |
| 2513 | * release the lock here. |
| 2514 | */ |
| 2515 | mmc_bus_put(host); |
| 2516 | |
Sascha Hauer | c1b55bf | 2013-12-05 14:34:46 +0100 | [diff] [blame] | 2517 | if (!(host->caps & MMC_CAP_NONREMOVABLE) && host->ops->get_cd && |
| 2518 | host->ops->get_cd(host) == 0) { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 2519 | mmc_claim_host(host); |
| 2520 | mmc_power_off(host); |
| 2521 | mmc_release_host(host); |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2522 | goto out; |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 2523 | } |
Jorg Schummer | 94d89ef | 2009-03-31 17:51:21 +0300 | [diff] [blame] | 2524 | |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2525 | mmc_claim_host(host); |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 2526 | for (i = 0; i < ARRAY_SIZE(freqs); i++) { |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2527 | if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) |
| 2528 | break; |
Jaehoon Chung | 06b2233 | 2011-05-12 17:18:59 +0900 | [diff] [blame] | 2529 | if (freqs[i] <= host->f_min) |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2530 | break; |
Hein Tibosch | 88ae8b8 | 2010-09-06 09:37:19 +0800 | [diff] [blame] | 2531 | } |
Andy Ross | 807e8e4 | 2011-01-03 10:36:56 -0800 | [diff] [blame] | 2532 | mmc_release_host(host); |
| 2533 | |
| 2534 | out: |
Anton Vorontsov | 28f5248 | 2008-06-17 18:17:15 +0400 | [diff] [blame] | 2535 | if (host->caps & MMC_CAP_NEEDS_POLL) |
| 2536 | mmc_schedule_delayed_work(&host->detect, HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | } |
| 2538 | |
Pierre Ossman | b93931a | 2007-05-19 14:06:24 +0200 | [diff] [blame] | 2539 | void mmc_start_host(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | { |
Ulf Hansson | fa55018 | 2012-05-09 16:15:26 +0200 | [diff] [blame] | 2541 | host->f_init = max(freqs[0], host->f_min); |
Guennadi Liakhovetski | d9adcc1 | 2012-06-14 10:17:39 +0200 | [diff] [blame] | 2542 | host->rescan_disable = 0; |
Roger Tseng | 8af465d | 2014-09-24 17:07:13 +0800 | [diff] [blame] | 2543 | host->ios.power_mode = MMC_POWER_UNDEFINED; |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2544 | |
| 2545 | mmc_claim_host(host); |
Adrian Hunter | a08b17b | 2013-04-15 11:27:25 -0400 | [diff] [blame] | 2546 | if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP) |
| 2547 | mmc_power_off(host); |
| 2548 | else |
Ulf Hansson | 4a06519 | 2013-09-12 14:36:53 +0200 | [diff] [blame] | 2549 | mmc_power_up(host, host->ocr_avail); |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2550 | mmc_release_host(host); |
| 2551 | |
Adrian Hunter | 740a221 | 2014-03-10 15:02:41 +0200 | [diff] [blame] | 2552 | mmc_gpiod_request_cd_irq(host); |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 2553 | _mmc_detect_change(host, 0, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | } |
| 2555 | |
Pierre Ossman | b93931a | 2007-05-19 14:06:24 +0200 | [diff] [blame] | 2556 | void mmc_stop_host(struct mmc_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | { |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2558 | #ifdef CONFIG_MMC_DEBUG |
Pierre Ossman | 1efd48b | 2007-05-08 22:35:17 +0200 | [diff] [blame] | 2559 | unsigned long flags; |
| 2560 | spin_lock_irqsave(&host->lock, flags); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2561 | host->removed = 1; |
Pierre Ossman | 1efd48b | 2007-05-08 22:35:17 +0200 | [diff] [blame] | 2562 | spin_unlock_irqrestore(&host->lock, flags); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2563 | #endif |
Adrian Hunter | 740a221 | 2014-03-10 15:02:41 +0200 | [diff] [blame] | 2564 | if (host->slot.cd_irq >= 0) |
| 2565 | disable_irq(host->slot.cd_irq); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2566 | |
Guennadi Liakhovetski | d9adcc1 | 2012-06-14 10:17:39 +0200 | [diff] [blame] | 2567 | host->rescan_disable = 1; |
Guennadi Liakhovetski | d9bcbf3 | 2010-11-11 17:32:25 +0100 | [diff] [blame] | 2568 | cancel_delayed_work_sync(&host->detect); |
Pierre Ossman | 3b91e55 | 2007-02-11 20:43:19 +0100 | [diff] [blame] | 2569 | mmc_flush_scheduled_work(); |
| 2570 | |
Nicolas Pitre | da68c4e | 2010-03-05 13:43:31 -0800 | [diff] [blame] | 2571 | /* clear pm flags now and let card drivers set them as needed */ |
| 2572 | host->pm_flags = 0; |
| 2573 | |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2574 | mmc_bus_get(host); |
| 2575 | if (host->bus_ops && !host->bus_dead) { |
Guennadi Liakhovetski | 0db13fc | 2012-01-04 15:28:45 +0100 | [diff] [blame] | 2576 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
Ulf Hansson | 58a8a4a | 2013-06-10 17:03:36 +0200 | [diff] [blame] | 2577 | host->bus_ops->remove(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2578 | mmc_claim_host(host); |
| 2579 | mmc_detach_bus(host); |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 2580 | mmc_power_off(host); |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2581 | mmc_release_host(host); |
Denis Karpov | 53509f0 | 2009-09-22 16:44:36 -0700 | [diff] [blame] | 2582 | mmc_bus_put(host); |
| 2583 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2584 | } |
Pierre Ossman | 7ea239d | 2006-12-31 00:11:32 +0100 | [diff] [blame] | 2585 | mmc_bus_put(host); |
| 2586 | |
| 2587 | BUG_ON(host->card); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2588 | |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2589 | mmc_claim_host(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | mmc_power_off(host); |
Ulf Hansson | 8d1ffc8c | 2015-09-11 14:41:55 +0200 | [diff] [blame] | 2591 | mmc_release_host(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | } |
| 2593 | |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2594 | int mmc_power_save_host(struct mmc_host *host) |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2595 | { |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2596 | int ret = 0; |
| 2597 | |
Daniel Drake | bb9cab9 | 2011-07-17 16:38:41 +0100 | [diff] [blame] | 2598 | #ifdef CONFIG_MMC_DEBUG |
| 2599 | pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); |
| 2600 | #endif |
| 2601 | |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2602 | mmc_bus_get(host); |
| 2603 | |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2604 | if (!host->bus_ops || host->bus_dead) { |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2605 | mmc_bus_put(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2606 | return -EINVAL; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2607 | } |
| 2608 | |
| 2609 | if (host->bus_ops->power_save) |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2610 | ret = host->bus_ops->power_save(host); |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2611 | |
| 2612 | mmc_bus_put(host); |
| 2613 | |
| 2614 | mmc_power_off(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2615 | |
| 2616 | return ret; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2617 | } |
| 2618 | EXPORT_SYMBOL(mmc_power_save_host); |
| 2619 | |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2620 | int mmc_power_restore_host(struct mmc_host *host) |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2621 | { |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2622 | int ret; |
| 2623 | |
Daniel Drake | bb9cab9 | 2011-07-17 16:38:41 +0100 | [diff] [blame] | 2624 | #ifdef CONFIG_MMC_DEBUG |
| 2625 | pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); |
| 2626 | #endif |
| 2627 | |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2628 | mmc_bus_get(host); |
| 2629 | |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2630 | if (!host->bus_ops || host->bus_dead) { |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2631 | mmc_bus_put(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2632 | return -EINVAL; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2633 | } |
| 2634 | |
Ulf Hansson | 6904115 | 2013-09-13 11:31:33 +0200 | [diff] [blame] | 2635 | mmc_power_up(host, host->card->ocr); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2636 | ret = host->bus_ops->power_restore(host); |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2637 | |
| 2638 | mmc_bus_put(host); |
Ohad Ben-Cohen | 12ae637 | 2010-10-02 13:54:06 +0200 | [diff] [blame] | 2639 | |
| 2640 | return ret; |
Adrian Hunter | eae1aee | 2009-09-22 16:44:33 -0700 | [diff] [blame] | 2641 | } |
| 2642 | EXPORT_SYMBOL(mmc_power_restore_host); |
| 2643 | |
Seungwon Jeon | 881d1c2 | 2011-10-14 14:03:21 +0900 | [diff] [blame] | 2644 | /* |
| 2645 | * Flush the cache to the non-volatile storage. |
| 2646 | */ |
| 2647 | int mmc_flush_cache(struct mmc_card *card) |
| 2648 | { |
Seungwon Jeon | 881d1c2 | 2011-10-14 14:03:21 +0900 | [diff] [blame] | 2649 | int err = 0; |
| 2650 | |
Seungwon Jeon | 881d1c2 | 2011-10-14 14:03:21 +0900 | [diff] [blame] | 2651 | if (mmc_card_mmc(card) && |
| 2652 | (card->ext_csd.cache_size > 0) && |
| 2653 | (card->ext_csd.cache_ctrl & 1)) { |
| 2654 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| 2655 | EXT_CSD_FLUSH_CACHE, 1, 0); |
| 2656 | if (err) |
| 2657 | pr_err("%s: cache flush error %d\n", |
| 2658 | mmc_hostname(card->host), err); |
| 2659 | } |
| 2660 | |
| 2661 | return err; |
| 2662 | } |
| 2663 | EXPORT_SYMBOL(mmc_flush_cache); |
| 2664 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | #ifdef CONFIG_PM |
| 2666 | |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2667 | /* Do the card removal on suspend if card is assumed removeable |
| 2668 | * Do that in pm notifier while userspace isn't yet frozen, so we will be able |
| 2669 | to sync the card. |
| 2670 | */ |
| 2671 | int mmc_pm_notify(struct notifier_block *notify_block, |
| 2672 | unsigned long mode, void *unused) |
| 2673 | { |
| 2674 | struct mmc_host *host = container_of( |
| 2675 | notify_block, struct mmc_host, pm_notify); |
| 2676 | unsigned long flags; |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 2677 | int err = 0; |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2678 | |
| 2679 | switch (mode) { |
| 2680 | case PM_HIBERNATION_PREPARE: |
| 2681 | case PM_SUSPEND_PREPARE: |
Grygorii Strashko | 184af16 | 2015-04-23 13:43:43 +0300 | [diff] [blame] | 2682 | case PM_RESTORE_PREPARE: |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2683 | spin_lock_irqsave(&host->lock, flags); |
| 2684 | host->rescan_disable = 1; |
| 2685 | spin_unlock_irqrestore(&host->lock, flags); |
| 2686 | cancel_delayed_work_sync(&host->detect); |
| 2687 | |
Ulf Hansson | 810cadd | 2013-06-10 17:03:37 +0200 | [diff] [blame] | 2688 | if (!host->bus_ops) |
| 2689 | break; |
| 2690 | |
| 2691 | /* Validate prerequisites for suspend */ |
| 2692 | if (host->bus_ops->pre_suspend) |
| 2693 | err = host->bus_ops->pre_suspend(host); |
Ulf Hansson | 5601aaf | 2013-10-30 23:15:30 +0100 | [diff] [blame] | 2694 | if (!err) |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2695 | break; |
| 2696 | |
Guennadi Liakhovetski | 0db13fc | 2012-01-04 15:28:45 +0100 | [diff] [blame] | 2697 | /* Calling bus_ops->remove() with a claimed host can deadlock */ |
Ulf Hansson | 58a8a4a | 2013-06-10 17:03:36 +0200 | [diff] [blame] | 2698 | host->bus_ops->remove(host); |
Guennadi Liakhovetski | 0db13fc | 2012-01-04 15:28:45 +0100 | [diff] [blame] | 2699 | mmc_claim_host(host); |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2700 | mmc_detach_bus(host); |
Ulf Hansson | 7f7e412 | 2011-09-21 14:08:13 -0400 | [diff] [blame] | 2701 | mmc_power_off(host); |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2702 | mmc_release_host(host); |
| 2703 | host->pm_flags = 0; |
| 2704 | break; |
| 2705 | |
| 2706 | case PM_POST_SUSPEND: |
| 2707 | case PM_POST_HIBERNATION: |
Takashi Iwai | 274476f | 2010-12-10 08:40:31 +0100 | [diff] [blame] | 2708 | case PM_POST_RESTORE: |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2709 | |
| 2710 | spin_lock_irqsave(&host->lock, flags); |
| 2711 | host->rescan_disable = 0; |
| 2712 | spin_unlock_irqrestore(&host->lock, flags); |
Ulf Hansson | bbd4368 | 2013-09-20 11:02:35 +0200 | [diff] [blame] | 2713 | _mmc_detect_change(host, 0, false); |
Maxim Levitsky | 4c2ef25 | 2010-08-10 18:01:41 -0700 | [diff] [blame] | 2714 | |
| 2715 | } |
| 2716 | |
| 2717 | return 0; |
| 2718 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2719 | #endif |
| 2720 | |
Konstantin Dorfman | 2220eed | 2013-01-14 14:28:17 -0500 | [diff] [blame] | 2721 | /** |
| 2722 | * mmc_init_context_info() - init synchronization context |
| 2723 | * @host: mmc host |
| 2724 | * |
| 2725 | * Init struct context_info needed to implement asynchronous |
| 2726 | * request mechanism, used by mmc core, host driver and mmc requests |
| 2727 | * supplier. |
| 2728 | */ |
| 2729 | void mmc_init_context_info(struct mmc_host *host) |
| 2730 | { |
| 2731 | spin_lock_init(&host->context_info.lock); |
| 2732 | host->context_info.is_new_req = false; |
| 2733 | host->context_info.is_done_rcv = false; |
| 2734 | host->context_info.is_waiting_last_req = false; |
| 2735 | init_waitqueue_head(&host->context_info.wait); |
| 2736 | } |
| 2737 | |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 2738 | static int __init mmc_init(void) |
| 2739 | { |
| 2740 | int ret; |
| 2741 | |
Tejun Heo | 0d9ee5b | 2010-12-24 16:00:17 +0100 | [diff] [blame] | 2742 | workqueue = alloc_ordered_workqueue("kmmcd", 0); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 2743 | if (!workqueue) |
| 2744 | return -ENOMEM; |
| 2745 | |
| 2746 | ret = mmc_register_bus(); |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 2747 | if (ret) |
| 2748 | goto destroy_workqueue; |
| 2749 | |
| 2750 | ret = mmc_register_host_class(); |
| 2751 | if (ret) |
| 2752 | goto unregister_bus; |
| 2753 | |
| 2754 | ret = sdio_register_bus(); |
| 2755 | if (ret) |
| 2756 | goto unregister_host_class; |
| 2757 | |
| 2758 | return 0; |
| 2759 | |
| 2760 | unregister_host_class: |
| 2761 | mmc_unregister_host_class(); |
| 2762 | unregister_bus: |
| 2763 | mmc_unregister_bus(); |
| 2764 | destroy_workqueue: |
| 2765 | destroy_workqueue(workqueue); |
| 2766 | |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 2767 | return ret; |
| 2768 | } |
| 2769 | |
| 2770 | static void __exit mmc_exit(void) |
| 2771 | { |
Pierre Ossman | e29a7d7 | 2007-05-26 13:48:18 +0200 | [diff] [blame] | 2772 | sdio_unregister_bus(); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 2773 | mmc_unregister_host_class(); |
| 2774 | mmc_unregister_bus(); |
| 2775 | destroy_workqueue(workqueue); |
| 2776 | } |
| 2777 | |
Nicolas Pitre | 2607496 | 2007-06-16 02:07:53 -0400 | [diff] [blame] | 2778 | subsys_initcall(mmc_init); |
Pierre Ossman | ffce2e7 | 2007-05-19 14:32:22 +0200 | [diff] [blame] | 2779 | module_exit(mmc_exit); |
| 2780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2781 | MODULE_LICENSE("GPL"); |