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 | |
| 12 | #include <linux/types.h> |
| 13 | #include <asm/scatterlist.h> |
| 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 | |
| 61 | int mmc_go_idle(struct mmc_host *host) |
| 62 | { |
| 63 | int err; |
| 64 | struct mmc_command cmd; |
| 65 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 66 | /* |
| 67 | * Non-SPI hosts need to prevent chipselect going active during |
| 68 | * GO_IDLE; that would put chips into SPI mode. Remind them of |
| 69 | * that in case of hardware that won't pull up DAT3/nCS otherwise. |
| 70 | * |
| 71 | * SPI hosts ignore ios.chip_select; it's managed according to |
| 72 | * rules that must accomodate non-MMC slaves which this layer |
| 73 | * won't even know about. |
| 74 | */ |
| 75 | if (!mmc_host_is_spi(host)) { |
| 76 | mmc_set_chip_select(host, MMC_CS_HIGH); |
| 77 | mmc_delay(1); |
| 78 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 79 | |
| 80 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 81 | |
| 82 | cmd.opcode = MMC_GO_IDLE_STATE; |
| 83 | cmd.arg = 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 84 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 85 | |
| 86 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 87 | |
| 88 | mmc_delay(1); |
| 89 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 90 | if (!mmc_host_is_spi(host)) { |
| 91 | mmc_set_chip_select(host, MMC_CS_DONTCARE); |
| 92 | mmc_delay(1); |
| 93 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 94 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 95 | host->use_spi_crc = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 96 | |
| 97 | return err; |
| 98 | } |
| 99 | |
| 100 | int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) |
| 101 | { |
| 102 | struct mmc_command cmd; |
| 103 | int i, err = 0; |
| 104 | |
| 105 | BUG_ON(!host); |
| 106 | |
| 107 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 108 | |
| 109 | cmd.opcode = MMC_SEND_OP_COND; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 110 | cmd.arg = mmc_host_is_spi(host) ? 0 : ocr; |
| 111 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 112 | |
| 113 | for (i = 100; i; i--) { |
| 114 | err = mmc_wait_for_cmd(host, &cmd, 0); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 115 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 116 | break; |
| 117 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 118 | /* if we're just probing, do a single pass */ |
| 119 | if (ocr == 0) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 120 | break; |
| 121 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 122 | /* otherwise wait until reset completes */ |
| 123 | if (mmc_host_is_spi(host)) { |
| 124 | if (!(cmd.resp[0] & R1_SPI_IDLE)) |
| 125 | break; |
| 126 | } else { |
| 127 | if (cmd.resp[0] & MMC_CARD_BUSY) |
| 128 | break; |
| 129 | } |
| 130 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 131 | err = -ETIMEDOUT; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 132 | |
| 133 | mmc_delay(10); |
| 134 | } |
| 135 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 136 | if (rocr && !mmc_host_is_spi(host)) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 137 | *rocr = cmd.resp[0]; |
| 138 | |
| 139 | return err; |
| 140 | } |
| 141 | |
| 142 | int mmc_all_send_cid(struct mmc_host *host, u32 *cid) |
| 143 | { |
| 144 | int err; |
| 145 | struct mmc_command cmd; |
| 146 | |
| 147 | BUG_ON(!host); |
| 148 | BUG_ON(!cid); |
| 149 | |
| 150 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 151 | |
| 152 | cmd.opcode = MMC_ALL_SEND_CID; |
| 153 | cmd.arg = 0; |
| 154 | cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; |
| 155 | |
| 156 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 157 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 158 | return err; |
| 159 | |
| 160 | memcpy(cid, cmd.resp, sizeof(u32) * 4); |
| 161 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 162 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | int mmc_set_relative_addr(struct mmc_card *card) |
| 166 | { |
| 167 | int err; |
| 168 | struct mmc_command cmd; |
| 169 | |
| 170 | BUG_ON(!card); |
| 171 | BUG_ON(!card->host); |
| 172 | |
| 173 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 174 | |
| 175 | cmd.opcode = MMC_SET_RELATIVE_ADDR; |
| 176 | cmd.arg = card->rca << 16; |
| 177 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 178 | |
| 179 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 180 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 181 | return err; |
| 182 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 183 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 184 | } |
| 185 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 186 | static int |
| 187 | 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] | 188 | { |
| 189 | int err; |
| 190 | struct mmc_command cmd; |
| 191 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 192 | BUG_ON(!host); |
| 193 | BUG_ON(!cxd); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 194 | |
| 195 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 196 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 197 | cmd.opcode = opcode; |
| 198 | cmd.arg = arg; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 199 | cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; |
| 200 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 201 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 202 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 203 | return err; |
| 204 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 205 | memcpy(cxd, cmd.resp, sizeof(u32) * 4); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 206 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 207 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 208 | } |
| 209 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 210 | static int |
| 211 | mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, |
| 212 | u32 opcode, void *buf, unsigned len) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 213 | { |
| 214 | struct mmc_request mrq; |
| 215 | struct mmc_command cmd; |
| 216 | struct mmc_data data; |
| 217 | struct scatterlist sg; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 218 | void *data_buf; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 219 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 220 | /* dma onto stack is unsafe/nonportable, but callers to this |
| 221 | * routine normally provide temporary on-stack buffers ... |
| 222 | */ |
| 223 | data_buf = kmalloc(len, GFP_KERNEL); |
| 224 | if (data_buf == NULL) |
| 225 | return -ENOMEM; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 226 | |
| 227 | memset(&mrq, 0, sizeof(struct mmc_request)); |
| 228 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 229 | memset(&data, 0, sizeof(struct mmc_data)); |
| 230 | |
| 231 | mrq.cmd = &cmd; |
| 232 | mrq.data = &data; |
| 233 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 234 | cmd.opcode = opcode; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 235 | cmd.arg = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 236 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 237 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 238 | * rely on callers to never use this with "native" calls for reading |
| 239 | * CSD or CID. Native versions of those commands use the R2 type, |
| 240 | * not R1 plus a data block. |
| 241 | */ |
| 242 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 243 | |
| 244 | data.blksz = len; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 245 | data.blocks = 1; |
| 246 | data.flags = MMC_DATA_READ; |
| 247 | data.sg = &sg; |
| 248 | data.sg_len = 1; |
| 249 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 250 | sg_init_one(&sg, data_buf, len); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 251 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 252 | if (card) |
| 253 | mmc_set_data_timeout(&data, card); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 254 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 255 | mmc_wait_for_req(host, &mrq); |
| 256 | |
| 257 | memcpy(buf, data_buf, len); |
| 258 | kfree(data_buf); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 259 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 260 | if (cmd.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 261 | return cmd.error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 262 | if (data.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 263 | return data.error; |
| 264 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 265 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 266 | } |
| 267 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 268 | int mmc_send_csd(struct mmc_card *card, u32 *csd) |
| 269 | { |
| 270 | if (!mmc_host_is_spi(card->host)) |
| 271 | return mmc_send_cxd_native(card->host, card->rca << 16, |
| 272 | csd, MMC_SEND_CSD); |
| 273 | |
| 274 | return mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16); |
| 275 | } |
| 276 | |
| 277 | int mmc_send_cid(struct mmc_host *host, u32 *cid) |
| 278 | { |
| 279 | if (!mmc_host_is_spi(host)) { |
| 280 | if (!host->card) |
| 281 | return -EINVAL; |
| 282 | return mmc_send_cxd_native(host, host->card->rca << 16, |
| 283 | cid, MMC_SEND_CID); |
| 284 | } |
| 285 | |
| 286 | return mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16); |
| 287 | } |
| 288 | |
| 289 | int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) |
| 290 | { |
| 291 | return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, |
| 292 | ext_csd, 512); |
| 293 | } |
| 294 | |
| 295 | int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) |
| 296 | { |
| 297 | struct mmc_command cmd; |
| 298 | int err; |
| 299 | |
| 300 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 301 | |
| 302 | cmd.opcode = MMC_SPI_READ_OCR; |
| 303 | cmd.arg = highcap ? (1 << 30) : 0; |
| 304 | cmd.flags = MMC_RSP_SPI_R3; |
| 305 | |
| 306 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 307 | |
| 308 | *ocrp = cmd.resp[1]; |
| 309 | return err; |
| 310 | } |
| 311 | |
| 312 | int mmc_spi_set_crc(struct mmc_host *host, int use_crc) |
| 313 | { |
| 314 | struct mmc_command cmd; |
| 315 | int err; |
| 316 | |
| 317 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 318 | |
| 319 | cmd.opcode = MMC_SPI_CRC_ON_OFF; |
| 320 | cmd.flags = MMC_RSP_SPI_R1; |
| 321 | cmd.arg = use_crc; |
| 322 | |
| 323 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 324 | if (!err) |
| 325 | host->use_spi_crc = use_crc; |
| 326 | return err; |
| 327 | } |
| 328 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 329 | int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value) |
| 330 | { |
| 331 | int err; |
| 332 | struct mmc_command cmd; |
| 333 | |
| 334 | BUG_ON(!card); |
| 335 | BUG_ON(!card->host); |
| 336 | |
| 337 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 338 | |
| 339 | cmd.opcode = MMC_SWITCH; |
| 340 | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | |
| 341 | (index << 16) | |
| 342 | (value << 8) | |
| 343 | set; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 344 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 345 | |
| 346 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 347 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 348 | return err; |
| 349 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 350 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | int mmc_send_status(struct mmc_card *card, u32 *status) |
| 354 | { |
| 355 | int err; |
| 356 | struct mmc_command cmd; |
| 357 | |
| 358 | BUG_ON(!card); |
| 359 | BUG_ON(!card->host); |
| 360 | |
| 361 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 362 | |
| 363 | cmd.opcode = MMC_SEND_STATUS; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 364 | if (!mmc_host_is_spi(card->host)) |
| 365 | cmd.arg = card->rca << 16; |
| 366 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 367 | |
| 368 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 369 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 370 | return err; |
| 371 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame^] | 372 | /* NOTE: callers are required to understand the difference |
| 373 | * between "native" and SPI format status words! |
| 374 | */ |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 375 | if (status) |
| 376 | *status = cmd.resp[0]; |
| 377 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 378 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 379 | } |
| 380 | |