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/sd_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 | #include <linux/mmc/sd.h> |
| 20 | |
| 21 | #include "core.h" |
| 22 | #include "sd_ops.h" |
| 23 | |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 24 | static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card) |
| 25 | { |
| 26 | int err; |
| 27 | struct mmc_command cmd; |
| 28 | |
| 29 | BUG_ON(!host); |
| 30 | BUG_ON(card && (card->host != host)); |
| 31 | |
| 32 | cmd.opcode = MMC_APP_CMD; |
| 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_R1 | MMC_CMD_BCR; |
| 40 | } |
| 41 | |
| 42 | err = mmc_wait_for_cmd(host, &cmd, 0); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 43 | if (err) |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 44 | return err; |
| 45 | |
| 46 | /* Check that card supported application commands */ |
| 47 | if (!(cmd.resp[0] & R1_APP_CMD)) |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 48 | return -EOPNOTSUPP; |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 49 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 50 | return 0; |
Adrian Bunk | 3936185 | 2007-07-25 00:40:58 +0200 | [diff] [blame] | 51 | } |
| 52 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 53 | /** |
| 54 | * mmc_wait_for_app_cmd - start an application command and wait for |
| 55 | completion |
| 56 | * @host: MMC host to start command |
Pierre Ossman | 67a61c4 | 2007-07-11 20:22:11 +0200 | [diff] [blame] | 57 | * @card: Card to send MMC_APP_CMD to |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 58 | * @cmd: MMC command to start |
| 59 | * @retries: maximum number of retries |
| 60 | * |
| 61 | * Sends a MMC_APP_CMD, checks the card response, sends the command |
| 62 | * in the parameter and waits for it to complete. Return any error |
| 63 | * that occurred while the command was executing. Do not attempt to |
| 64 | * parse the response. |
| 65 | */ |
| 66 | int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card, |
| 67 | struct mmc_command *cmd, int retries) |
| 68 | { |
| 69 | struct mmc_request mrq; |
| 70 | |
| 71 | int i, err; |
| 72 | |
| 73 | BUG_ON(!cmd); |
| 74 | BUG_ON(retries < 0); |
| 75 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 76 | err = -EIO; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 77 | |
| 78 | /* |
| 79 | * We have to resend MMC_APP_CMD for each attempt so |
| 80 | * we cannot use the retries field in mmc_command. |
| 81 | */ |
| 82 | for (i = 0;i <= retries;i++) { |
| 83 | memset(&mrq, 0, sizeof(struct mmc_request)); |
| 84 | |
| 85 | err = mmc_app_cmd(host, card); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 86 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 87 | continue; |
| 88 | |
| 89 | memset(&mrq, 0, sizeof(struct mmc_request)); |
| 90 | |
| 91 | memset(cmd->resp, 0, sizeof(cmd->resp)); |
| 92 | cmd->retries = 0; |
| 93 | |
| 94 | mrq.cmd = cmd; |
| 95 | cmd->data = NULL; |
| 96 | |
| 97 | mmc_wait_for_req(host, &mrq); |
| 98 | |
| 99 | err = cmd->error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 100 | if (!cmd->error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 101 | break; |
| 102 | } |
| 103 | |
| 104 | return err; |
| 105 | } |
| 106 | |
| 107 | EXPORT_SYMBOL(mmc_wait_for_app_cmd); |
| 108 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 109 | int mmc_app_set_bus_width(struct mmc_card *card, int width) |
| 110 | { |
| 111 | int err; |
| 112 | struct mmc_command cmd; |
| 113 | |
| 114 | BUG_ON(!card); |
| 115 | BUG_ON(!card->host); |
| 116 | |
| 117 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 118 | |
| 119 | cmd.opcode = SD_APP_SET_BUS_WIDTH; |
| 120 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 121 | |
| 122 | switch (width) { |
| 123 | case MMC_BUS_WIDTH_1: |
| 124 | cmd.arg = SD_BUS_WIDTH_1; |
| 125 | break; |
| 126 | case MMC_BUS_WIDTH_4: |
| 127 | cmd.arg = SD_BUS_WIDTH_4; |
| 128 | break; |
| 129 | default: |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 130 | return -EINVAL; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 134 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 135 | return err; |
| 136 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 137 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) |
| 141 | { |
| 142 | struct mmc_command cmd; |
| 143 | int i, err = 0; |
| 144 | |
| 145 | BUG_ON(!host); |
| 146 | |
| 147 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 148 | |
| 149 | cmd.opcode = SD_APP_OP_COND; |
| 150 | cmd.arg = ocr; |
| 151 | cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; |
| 152 | |
| 153 | for (i = 100; i; i--) { |
| 154 | err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 155 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 156 | break; |
| 157 | |
| 158 | if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) |
| 159 | break; |
| 160 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 161 | err = -ETIMEDOUT; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 162 | |
| 163 | mmc_delay(10); |
| 164 | } |
| 165 | |
| 166 | if (rocr) |
| 167 | *rocr = cmd.resp[0]; |
| 168 | |
| 169 | return err; |
| 170 | } |
| 171 | |
| 172 | int mmc_send_if_cond(struct mmc_host *host, u32 ocr) |
| 173 | { |
| 174 | struct mmc_command cmd; |
| 175 | int err; |
| 176 | static const u8 test_pattern = 0xAA; |
| 177 | |
| 178 | /* |
| 179 | * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND |
| 180 | * before SD_APP_OP_COND. This command will harmlessly fail for |
| 181 | * SD 1.0 cards. |
| 182 | */ |
| 183 | cmd.opcode = SD_SEND_IF_COND; |
| 184 | cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern; |
| 185 | cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR; |
| 186 | |
| 187 | err = mmc_wait_for_cmd(host, &cmd, 0); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 188 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 189 | return err; |
| 190 | |
| 191 | if ((cmd.resp[0] & 0xFF) != test_pattern) |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 192 | return -EIO; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 193 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 194 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca) |
| 198 | { |
| 199 | int err; |
| 200 | struct mmc_command cmd; |
| 201 | |
| 202 | BUG_ON(!host); |
| 203 | BUG_ON(!rca); |
| 204 | |
| 205 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 206 | |
| 207 | cmd.opcode = SD_SEND_RELATIVE_ADDR; |
| 208 | cmd.arg = 0; |
| 209 | cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; |
| 210 | |
| 211 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 212 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 213 | return err; |
| 214 | |
| 215 | *rca = cmd.resp[0] >> 16; |
| 216 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 217 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | int mmc_app_send_scr(struct mmc_card *card, u32 *scr) |
| 221 | { |
| 222 | int err; |
| 223 | struct mmc_request mrq; |
| 224 | struct mmc_command cmd; |
| 225 | struct mmc_data data; |
| 226 | struct scatterlist sg; |
| 227 | |
| 228 | BUG_ON(!card); |
| 229 | BUG_ON(!card->host); |
| 230 | BUG_ON(!scr); |
| 231 | |
| 232 | err = mmc_app_cmd(card->host, card); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 233 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 234 | return err; |
| 235 | |
| 236 | memset(&mrq, 0, sizeof(struct mmc_request)); |
| 237 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 238 | memset(&data, 0, sizeof(struct mmc_data)); |
| 239 | |
| 240 | mrq.cmd = &cmd; |
| 241 | mrq.data = &data; |
| 242 | |
| 243 | cmd.opcode = SD_APP_SEND_SCR; |
| 244 | cmd.arg = 0; |
| 245 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; |
| 246 | |
| 247 | data.blksz = 8; |
| 248 | data.blocks = 1; |
| 249 | data.flags = MMC_DATA_READ; |
| 250 | data.sg = &sg; |
| 251 | data.sg_len = 1; |
| 252 | |
| 253 | sg_init_one(&sg, scr, 8); |
| 254 | |
| 255 | mmc_set_data_timeout(&data, card, 0); |
| 256 | |
| 257 | mmc_wait_for_req(card->host, &mrq); |
| 258 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 259 | if (cmd.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 260 | return cmd.error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 261 | if (data.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 262 | return data.error; |
| 263 | |
| 264 | scr[0] = ntohl(scr[0]); |
| 265 | scr[1] = ntohl(scr[1]); |
| 266 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 267 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | int mmc_sd_switch(struct mmc_card *card, int mode, int group, |
| 271 | u8 value, u8 *resp) |
| 272 | { |
| 273 | struct mmc_request mrq; |
| 274 | struct mmc_command cmd; |
| 275 | struct mmc_data data; |
| 276 | struct scatterlist sg; |
| 277 | |
| 278 | BUG_ON(!card); |
| 279 | BUG_ON(!card->host); |
| 280 | |
| 281 | mode = !!mode; |
| 282 | value &= 0xF; |
| 283 | |
| 284 | memset(&mrq, 0, sizeof(struct mmc_request)); |
| 285 | memset(&cmd, 0, sizeof(struct mmc_command)); |
| 286 | memset(&data, 0, sizeof(struct mmc_data)); |
| 287 | |
| 288 | mrq.cmd = &cmd; |
| 289 | mrq.data = &data; |
| 290 | |
| 291 | cmd.opcode = SD_SWITCH; |
| 292 | cmd.arg = mode << 31 | 0x00FFFFFF; |
| 293 | cmd.arg &= ~(0xF << (group * 4)); |
| 294 | cmd.arg |= value << (group * 4); |
| 295 | cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; |
| 296 | |
| 297 | data.blksz = 64; |
| 298 | data.blocks = 1; |
| 299 | data.flags = MMC_DATA_READ; |
| 300 | data.sg = &sg; |
| 301 | data.sg_len = 1; |
| 302 | |
| 303 | sg_init_one(&sg, resp, 64); |
| 304 | |
| 305 | mmc_set_data_timeout(&data, card, 0); |
| 306 | |
| 307 | mmc_wait_for_req(card->host, &mrq); |
| 308 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 309 | if (cmd.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 310 | return cmd.error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 311 | if (data.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 312 | return data.error; |
| 313 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame^] | 314 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 315 | } |
| 316 | |