Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 1 | /* |
Pierre Ossman | 70f1048 | 2007-07-11 20:04:50 +0200 | [diff] [blame] | 2 | * linux/drivers/mmc/core/mmc_ops.h |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 3 | * |
| 4 | * Copyright 2006-2007 Pierre Ossman |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or (at |
| 9 | * your option) any later version. |
| 10 | */ |
| 11 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame^] | 12 | #include <linux/slab.h> |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 13 | #include <linux/types.h> |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 14 | #include <linux/scatterlist.h> |
| 15 | |
| 16 | #include <linux/mmc/host.h> |
| 17 | #include <linux/mmc/card.h> |
| 18 | #include <linux/mmc/mmc.h> |
| 19 | |
| 20 | #include "core.h" |
| 21 | #include "mmc_ops.h" |
| 22 | |
| 23 | static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card) |
| 24 | { |
| 25 | int err; |
| 26 | struct mmc_command cmd; |
| 27 | |
| 28 | BUG_ON(!host); |
| 29 | |
| 30 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 31 | |
| 32 | cmd.opcode = MMC_SELECT_CARD; |
| 33 | |
| 34 | if (card) { |
| 35 | cmd.arg = card->rca << 16; |
| 36 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 37 | } else { |
| 38 | cmd.arg = 0; |
| 39 | cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; |
| 40 | } |
| 41 | |
| 42 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 43 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 44 | return err; |
| 45 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 46 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | int mmc_select_card(struct mmc_card *card) |
| 50 | { |
| 51 | BUG_ON(!card); |
| 52 | |
| 53 | return _mmc_select_card(card->host, card); |
| 54 | } |
| 55 | |
| 56 | int mmc_deselect_cards(struct mmc_host *host) |
| 57 | { |
| 58 | return _mmc_select_card(host, NULL); |
| 59 | } |
| 60 | |
Jarkko Lavinen | b1ebe38 | 2009-09-22 16:44:34 -0700 | [diff] [blame] | 61 | int mmc_card_sleepawake(struct mmc_host *host, int sleep) |
| 62 | { |
| 63 | struct mmc_command cmd; |
| 64 | struct mmc_card *card = host->card; |
| 65 | int err; |
| 66 | |
| 67 | if (sleep) |
| 68 | mmc_deselect_cards(host); |
| 69 | |
| 70 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 71 | |
| 72 | cmd.opcode = MMC_SLEEP_AWAKE; |
| 73 | cmd.arg = card->rca << 16; |
| 74 | if (sleep) |
| 75 | cmd.arg |= 1 << 15; |
| 76 | |
| 77 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; |
| 78 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 79 | if (err) |
| 80 | return err; |
| 81 | |
| 82 | /* |
| 83 | * If the host does not wait while the card signals busy, then we will |
| 84 | * will have to wait the sleep/awake timeout. Note, we cannot use the |
| 85 | * SEND_STATUS command to poll the status because that command (and most |
| 86 | * others) is invalid while the card sleeps. |
| 87 | */ |
| 88 | if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) |
| 89 | mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000)); |
| 90 | |
| 91 | if (!sleep) |
| 92 | err = mmc_select_card(card); |
| 93 | |
| 94 | return err; |
| 95 | } |
| 96 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 97 | int mmc_go_idle(struct mmc_host *host) |
| 98 | { |
| 99 | int err; |
| 100 | struct mmc_command cmd; |
| 101 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 102 | /* |
| 103 | * Non-SPI hosts need to prevent chipselect going active during |
| 104 | * GO_IDLE; that would put chips into SPI mode. Remind them of |
| 105 | * that in case of hardware that won't pull up DAT3/nCS otherwise. |
| 106 | * |
| 107 | * SPI hosts ignore ios.chip_select; it's managed according to |
| 108 | * rules that must accomodate non-MMC slaves which this layer |
| 109 | * won't even know about. |
| 110 | */ |
| 111 | if (!mmc_host_is_spi(host)) { |
| 112 | mmc_set_chip_select(host, MMC_CS_HIGH); |
| 113 | mmc_delay(1); |
| 114 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 115 | |
| 116 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 117 | |
| 118 | cmd.opcode = MMC_GO_IDLE_STATE; |
| 119 | cmd.arg = 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 120 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 121 | |
| 122 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 123 | |
| 124 | mmc_delay(1); |
| 125 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 126 | if (!mmc_host_is_spi(host)) { |
| 127 | mmc_set_chip_select(host, MMC_CS_DONTCARE); |
| 128 | mmc_delay(1); |
| 129 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 130 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 131 | host->use_spi_crc = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 132 | |
| 133 | return err; |
| 134 | } |
| 135 | |
| 136 | int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) |
| 137 | { |
| 138 | struct mmc_command cmd; |
| 139 | int i, err = 0; |
| 140 | |
| 141 | BUG_ON(!host); |
| 142 | |
| 143 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 144 | |
| 145 | cmd.opcode = MMC_SEND_OP_COND; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 146 | cmd.arg = mmc_host_is_spi(host) ? 0 : ocr; |
| 147 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 148 | |
| 149 | for (i = 100; i; i--) { |
| 150 | err = mmc_wait_for_cmd(host, &cmd, 0); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 151 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 152 | break; |
| 153 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 154 | /* if we're just probing, do a single pass */ |
| 155 | if (ocr == 0) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 156 | break; |
| 157 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 158 | /* otherwise wait until reset completes */ |
| 159 | if (mmc_host_is_spi(host)) { |
| 160 | if (!(cmd.resp[0] & R1_SPI_IDLE)) |
| 161 | break; |
| 162 | } else { |
| 163 | if (cmd.resp[0] & MMC_CARD_BUSY) |
| 164 | break; |
| 165 | } |
| 166 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 167 | err = -ETIMEDOUT; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 168 | |
| 169 | mmc_delay(10); |
| 170 | } |
| 171 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 172 | if (rocr && !mmc_host_is_spi(host)) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 173 | *rocr = cmd.resp[0]; |
| 174 | |
| 175 | return err; |
| 176 | } |
| 177 | |
| 178 | int mmc_all_send_cid(struct mmc_host *host, u32 *cid) |
| 179 | { |
| 180 | int err; |
| 181 | struct mmc_command cmd; |
| 182 | |
| 183 | BUG_ON(!host); |
| 184 | BUG_ON(!cid); |
| 185 | |
| 186 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 187 | |
| 188 | cmd.opcode = MMC_ALL_SEND_CID; |
| 189 | cmd.arg = 0; |
| 190 | cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; |
| 191 | |
| 192 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 193 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 194 | return err; |
| 195 | |
| 196 | memcpy(cid, cmd.resp, sizeof(u32) * 4); |
| 197 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 198 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | int mmc_set_relative_addr(struct mmc_card *card) |
| 202 | { |
| 203 | int err; |
| 204 | struct mmc_command cmd; |
| 205 | |
| 206 | BUG_ON(!card); |
| 207 | BUG_ON(!card->host); |
| 208 | |
| 209 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 210 | |
| 211 | cmd.opcode = MMC_SET_RELATIVE_ADDR; |
| 212 | cmd.arg = card->rca << 16; |
| 213 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 214 | |
| 215 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 216 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 217 | return err; |
| 218 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 219 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 220 | } |
| 221 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 222 | static int |
| 223 | mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 224 | { |
| 225 | int err; |
| 226 | struct mmc_command cmd; |
| 227 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 228 | BUG_ON(!host); |
| 229 | BUG_ON(!cxd); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 230 | |
| 231 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 232 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 233 | cmd.opcode = opcode; |
| 234 | cmd.arg = arg; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 235 | cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; |
| 236 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 237 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 238 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 239 | return err; |
| 240 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 241 | memcpy(cxd, cmd.resp, sizeof(u32) * 4); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 242 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 243 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 244 | } |
| 245 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 246 | static int |
| 247 | mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, |
| 248 | u32 opcode, void *buf, unsigned len) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 249 | { |
| 250 | struct mmc_request mrq; |
| 251 | struct mmc_command cmd; |
| 252 | struct mmc_data data; |
| 253 | struct scatterlist sg; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 254 | void *data_buf; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 255 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 256 | /* dma onto stack is unsafe/nonportable, but callers to this |
| 257 | * routine normally provide temporary on-stack buffers ... |
| 258 | */ |
| 259 | data_buf = kmalloc(len, GFP_KERNEL); |
| 260 | if (data_buf == NULL) |
| 261 | return -ENOMEM; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 262 | |
| 263 | memset(&mrq, 0, sizeof(struct mmc_request)); |
| 264 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 265 | memset(&data, 0, sizeof(struct mmc_data)); |
| 266 | |
| 267 | mrq.cmd = &cmd; |
| 268 | mrq.data = &data; |
| 269 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 270 | cmd.opcode = opcode; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 271 | cmd.arg = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 272 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 273 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 274 | * rely on callers to never use this with "native" calls for reading |
| 275 | * CSD or CID. Native versions of those commands use the R2 type, |
| 276 | * not R1 plus a data block. |
| 277 | */ |
| 278 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 279 | |
| 280 | data.blksz = len; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 281 | data.blocks = 1; |
| 282 | data.flags = MMC_DATA_READ; |
| 283 | data.sg = &sg; |
| 284 | data.sg_len = 1; |
| 285 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 286 | sg_init_one(&sg, data_buf, len); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 287 | |
Adrian Hunter | cda56ac2 | 2009-02-10 16:32:33 +0200 | [diff] [blame] | 288 | if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) { |
| 289 | /* |
| 290 | * The spec states that CSR and CID accesses have a timeout |
| 291 | * of 64 clock cycles. |
| 292 | */ |
| 293 | data.timeout_ns = 0; |
| 294 | data.timeout_clks = 64; |
| 295 | } else |
| 296 | mmc_set_data_timeout(&data, card); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 297 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 298 | mmc_wait_for_req(host, &mrq); |
| 299 | |
| 300 | memcpy(buf, data_buf, len); |
| 301 | kfree(data_buf); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 302 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 303 | if (cmd.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 304 | return cmd.error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 305 | if (data.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 306 | return data.error; |
| 307 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 308 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 309 | } |
| 310 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 311 | int mmc_send_csd(struct mmc_card *card, u32 *csd) |
| 312 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 313 | int ret, i; |
| 314 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 315 | if (!mmc_host_is_spi(card->host)) |
| 316 | return mmc_send_cxd_native(card->host, card->rca << 16, |
| 317 | csd, MMC_SEND_CSD); |
| 318 | |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 319 | ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16); |
| 320 | if (ret) |
| 321 | return ret; |
| 322 | |
| 323 | for (i = 0;i < 4;i++) |
| 324 | csd[i] = be32_to_cpu(csd[i]); |
| 325 | |
| 326 | return 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 327 | } |
| 328 | |
| 329 | int mmc_send_cid(struct mmc_host *host, u32 *cid) |
| 330 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 331 | int ret, i; |
| 332 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 333 | if (!mmc_host_is_spi(host)) { |
| 334 | if (!host->card) |
| 335 | return -EINVAL; |
| 336 | return mmc_send_cxd_native(host, host->card->rca << 16, |
| 337 | cid, MMC_SEND_CID); |
| 338 | } |
| 339 | |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 340 | ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16); |
| 341 | if (ret) |
| 342 | return ret; |
| 343 | |
| 344 | for (i = 0;i < 4;i++) |
| 345 | cid[i] = be32_to_cpu(cid[i]); |
| 346 | |
| 347 | return 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) |
| 351 | { |
| 352 | return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, |
| 353 | ext_csd, 512); |
| 354 | } |
| 355 | |
| 356 | int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) |
| 357 | { |
| 358 | struct mmc_command cmd; |
| 359 | int err; |
| 360 | |
| 361 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 362 | |
| 363 | cmd.opcode = MMC_SPI_READ_OCR; |
| 364 | cmd.arg = highcap ? (1 << 30) : 0; |
| 365 | cmd.flags = MMC_RSP_SPI_R3; |
| 366 | |
| 367 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 368 | |
| 369 | *ocrp = cmd.resp[1]; |
| 370 | return err; |
| 371 | } |
| 372 | |
| 373 | int mmc_spi_set_crc(struct mmc_host *host, int use_crc) |
| 374 | { |
| 375 | struct mmc_command cmd; |
| 376 | int err; |
| 377 | |
| 378 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 379 | |
| 380 | cmd.opcode = MMC_SPI_CRC_ON_OFF; |
| 381 | cmd.flags = MMC_RSP_SPI_R1; |
| 382 | cmd.arg = use_crc; |
| 383 | |
| 384 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 385 | if (!err) |
| 386 | host->use_spi_crc = use_crc; |
| 387 | return err; |
| 388 | } |
| 389 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 390 | int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) |
| 391 | { |
| 392 | int err; |
| 393 | struct mmc_command cmd; |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 394 | u32 status; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 395 | |
| 396 | BUG_ON(!card); |
| 397 | BUG_ON(!card->host); |
| 398 | |
| 399 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 400 | |
| 401 | cmd.opcode = MMC_SWITCH; |
| 402 | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | |
| 403 | (index << 16) | |
| 404 | (value << 8) | |
| 405 | set; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 406 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 407 | |
| 408 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 409 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 410 | return err; |
| 411 | |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 412 | /* Must check status to be sure of no errors */ |
| 413 | do { |
| 414 | err = mmc_send_status(card, &status); |
| 415 | if (err) |
| 416 | return err; |
| 417 | if (card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) |
| 418 | break; |
| 419 | if (mmc_host_is_spi(card->host)) |
| 420 | break; |
| 421 | } while (R1_CURRENT_STATE(status) == 7); |
| 422 | |
| 423 | if (mmc_host_is_spi(card->host)) { |
| 424 | if (status & R1_SPI_ILLEGAL_COMMAND) |
| 425 | return -EBADMSG; |
| 426 | } else { |
| 427 | if (status & 0xFDFFA000) |
| 428 | printk(KERN_WARNING "%s: unexpected status %#x after " |
| 429 | "switch", mmc_hostname(card->host), status); |
| 430 | if (status & R1_SWITCH_ERROR) |
| 431 | return -EBADMSG; |
| 432 | } |
| 433 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 434 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | int mmc_send_status(struct mmc_card *card, u32 *status) |
| 438 | { |
| 439 | int err; |
| 440 | struct mmc_command cmd; |
| 441 | |
| 442 | BUG_ON(!card); |
| 443 | BUG_ON(!card->host); |
| 444 | |
| 445 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 446 | |
| 447 | cmd.opcode = MMC_SEND_STATUS; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 448 | if (!mmc_host_is_spi(card->host)) |
| 449 | cmd.arg = card->rca << 16; |
| 450 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 451 | |
| 452 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 453 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 454 | return err; |
| 455 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 456 | /* NOTE: callers are required to understand the difference |
| 457 | * between "native" and SPI format status words! |
| 458 | */ |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 459 | if (status) |
| 460 | *status = cmd.resp[0]; |
| 461 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 462 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 463 | } |
| 464 | |