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; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 26 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 27 | |
| 28 | BUG_ON(!host); |
| 29 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 30 | cmd.opcode = MMC_SELECT_CARD; |
| 31 | |
| 32 | if (card) { |
| 33 | cmd.arg = card->rca << 16; |
| 34 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 35 | } else { |
| 36 | cmd.arg = 0; |
| 37 | cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; |
| 38 | } |
| 39 | |
| 40 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 41 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 42 | return err; |
| 43 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 44 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | int mmc_select_card(struct mmc_card *card) |
| 48 | { |
| 49 | BUG_ON(!card); |
| 50 | |
| 51 | return _mmc_select_card(card->host, card); |
| 52 | } |
| 53 | |
| 54 | int mmc_deselect_cards(struct mmc_host *host) |
| 55 | { |
| 56 | return _mmc_select_card(host, NULL); |
| 57 | } |
| 58 | |
Jarkko Lavinen | b1ebe38 | 2009-09-22 16:44:34 -0700 | [diff] [blame] | 59 | int mmc_card_sleepawake(struct mmc_host *host, int sleep) |
| 60 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 61 | struct mmc_command cmd = {0}; |
Jarkko Lavinen | b1ebe38 | 2009-09-22 16:44:34 -0700 | [diff] [blame] | 62 | struct mmc_card *card = host->card; |
| 63 | int err; |
| 64 | |
| 65 | if (sleep) |
| 66 | mmc_deselect_cards(host); |
| 67 | |
Jarkko Lavinen | b1ebe38 | 2009-09-22 16:44:34 -0700 | [diff] [blame] | 68 | cmd.opcode = MMC_SLEEP_AWAKE; |
| 69 | cmd.arg = card->rca << 16; |
| 70 | if (sleep) |
| 71 | cmd.arg |= 1 << 15; |
| 72 | |
| 73 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; |
| 74 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 75 | if (err) |
| 76 | return err; |
| 77 | |
| 78 | /* |
| 79 | * If the host does not wait while the card signals busy, then we will |
| 80 | * will have to wait the sleep/awake timeout. Note, we cannot use the |
| 81 | * SEND_STATUS command to poll the status because that command (and most |
| 82 | * others) is invalid while the card sleeps. |
| 83 | */ |
| 84 | if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) |
| 85 | mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000)); |
| 86 | |
| 87 | if (!sleep) |
| 88 | err = mmc_select_card(card); |
| 89 | |
| 90 | return err; |
| 91 | } |
| 92 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 93 | int mmc_go_idle(struct mmc_host *host) |
| 94 | { |
| 95 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 96 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 97 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 98 | /* |
| 99 | * Non-SPI hosts need to prevent chipselect going active during |
| 100 | * GO_IDLE; that would put chips into SPI mode. Remind them of |
| 101 | * that in case of hardware that won't pull up DAT3/nCS otherwise. |
| 102 | * |
| 103 | * SPI hosts ignore ios.chip_select; it's managed according to |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 104 | * rules that must accommodate non-MMC slaves which this layer |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 105 | * won't even know about. |
| 106 | */ |
| 107 | if (!mmc_host_is_spi(host)) { |
| 108 | mmc_set_chip_select(host, MMC_CS_HIGH); |
| 109 | mmc_delay(1); |
| 110 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 111 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 112 | cmd.opcode = MMC_GO_IDLE_STATE; |
| 113 | cmd.arg = 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 114 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 115 | |
| 116 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 117 | |
| 118 | mmc_delay(1); |
| 119 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 120 | if (!mmc_host_is_spi(host)) { |
| 121 | mmc_set_chip_select(host, MMC_CS_DONTCARE); |
| 122 | mmc_delay(1); |
| 123 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 124 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 125 | host->use_spi_crc = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 126 | |
| 127 | return err; |
| 128 | } |
| 129 | |
| 130 | int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) |
| 131 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 132 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 133 | int i, err = 0; |
| 134 | |
| 135 | BUG_ON(!host); |
| 136 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 137 | cmd.opcode = MMC_SEND_OP_COND; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 138 | cmd.arg = mmc_host_is_spi(host) ? 0 : ocr; |
| 139 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 140 | |
| 141 | for (i = 100; i; i--) { |
| 142 | err = mmc_wait_for_cmd(host, &cmd, 0); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 143 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 144 | break; |
| 145 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 146 | /* if we're just probing, do a single pass */ |
| 147 | if (ocr == 0) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 148 | break; |
| 149 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 150 | /* otherwise wait until reset completes */ |
| 151 | if (mmc_host_is_spi(host)) { |
| 152 | if (!(cmd.resp[0] & R1_SPI_IDLE)) |
| 153 | break; |
| 154 | } else { |
| 155 | if (cmd.resp[0] & MMC_CARD_BUSY) |
| 156 | break; |
| 157 | } |
| 158 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 159 | err = -ETIMEDOUT; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 160 | |
| 161 | mmc_delay(10); |
| 162 | } |
| 163 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 164 | if (rocr && !mmc_host_is_spi(host)) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 165 | *rocr = cmd.resp[0]; |
| 166 | |
| 167 | return err; |
| 168 | } |
| 169 | |
| 170 | int mmc_all_send_cid(struct mmc_host *host, u32 *cid) |
| 171 | { |
| 172 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 173 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 174 | |
| 175 | BUG_ON(!host); |
| 176 | BUG_ON(!cid); |
| 177 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 178 | cmd.opcode = MMC_ALL_SEND_CID; |
| 179 | cmd.arg = 0; |
| 180 | cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; |
| 181 | |
| 182 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 183 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 184 | return err; |
| 185 | |
| 186 | memcpy(cid, cmd.resp, sizeof(u32) * 4); |
| 187 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 188 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | int mmc_set_relative_addr(struct mmc_card *card) |
| 192 | { |
| 193 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 194 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 195 | |
| 196 | BUG_ON(!card); |
| 197 | BUG_ON(!card->host); |
| 198 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 199 | cmd.opcode = MMC_SET_RELATIVE_ADDR; |
| 200 | cmd.arg = card->rca << 16; |
| 201 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 202 | |
| 203 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 204 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 205 | return err; |
| 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_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 212 | { |
| 213 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 214 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 215 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 216 | BUG_ON(!host); |
| 217 | BUG_ON(!cxd); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 218 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 219 | cmd.opcode = opcode; |
| 220 | cmd.arg = arg; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 221 | cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; |
| 222 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 223 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 224 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 225 | return err; |
| 226 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 227 | memcpy(cxd, cmd.resp, sizeof(u32) * 4); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 228 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 229 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 230 | } |
| 231 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 232 | static int |
| 233 | mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, |
| 234 | u32 opcode, void *buf, unsigned len) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 235 | { |
| 236 | struct mmc_request mrq; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 237 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 238 | struct mmc_data data; |
| 239 | struct scatterlist sg; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 240 | void *data_buf; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 241 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 242 | /* dma onto stack is unsafe/nonportable, but callers to this |
| 243 | * routine normally provide temporary on-stack buffers ... |
| 244 | */ |
| 245 | data_buf = kmalloc(len, GFP_KERNEL); |
| 246 | if (data_buf == NULL) |
| 247 | return -ENOMEM; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 248 | |
| 249 | memset(&mrq, 0, sizeof(struct mmc_request)); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 250 | memset(&data, 0, sizeof(struct mmc_data)); |
| 251 | |
| 252 | mrq.cmd = &cmd; |
| 253 | mrq.data = &data; |
| 254 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 255 | cmd.opcode = opcode; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 256 | cmd.arg = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 257 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 258 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 259 | * rely on callers to never use this with "native" calls for reading |
| 260 | * CSD or CID. Native versions of those commands use the R2 type, |
| 261 | * not R1 plus a data block. |
| 262 | */ |
| 263 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 264 | |
| 265 | data.blksz = len; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 266 | data.blocks = 1; |
| 267 | data.flags = MMC_DATA_READ; |
| 268 | data.sg = &sg; |
| 269 | data.sg_len = 1; |
| 270 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 271 | sg_init_one(&sg, data_buf, len); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 272 | |
Adrian Hunter | cda56ac2 | 2009-02-10 16:32:33 +0200 | [diff] [blame] | 273 | if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) { |
| 274 | /* |
| 275 | * The spec states that CSR and CID accesses have a timeout |
| 276 | * of 64 clock cycles. |
| 277 | */ |
| 278 | data.timeout_ns = 0; |
| 279 | data.timeout_clks = 64; |
| 280 | } else |
| 281 | mmc_set_data_timeout(&data, card); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 282 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 283 | mmc_wait_for_req(host, &mrq); |
| 284 | |
| 285 | memcpy(buf, data_buf, len); |
| 286 | kfree(data_buf); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 287 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 288 | if (cmd.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 289 | return cmd.error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 290 | if (data.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 291 | return data.error; |
| 292 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 293 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 294 | } |
| 295 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 296 | int mmc_send_csd(struct mmc_card *card, u32 *csd) |
| 297 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 298 | int ret, i; |
| 299 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 300 | if (!mmc_host_is_spi(card->host)) |
| 301 | return mmc_send_cxd_native(card->host, card->rca << 16, |
| 302 | csd, MMC_SEND_CSD); |
| 303 | |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 304 | ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16); |
| 305 | if (ret) |
| 306 | return ret; |
| 307 | |
| 308 | for (i = 0;i < 4;i++) |
| 309 | csd[i] = be32_to_cpu(csd[i]); |
| 310 | |
| 311 | return 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | int mmc_send_cid(struct mmc_host *host, u32 *cid) |
| 315 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 316 | int ret, i; |
| 317 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 318 | if (!mmc_host_is_spi(host)) { |
| 319 | if (!host->card) |
| 320 | return -EINVAL; |
| 321 | return mmc_send_cxd_native(host, host->card->rca << 16, |
| 322 | cid, MMC_SEND_CID); |
| 323 | } |
| 324 | |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 325 | ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16); |
| 326 | if (ret) |
| 327 | return ret; |
| 328 | |
| 329 | for (i = 0;i < 4;i++) |
| 330 | cid[i] = be32_to_cpu(cid[i]); |
| 331 | |
| 332 | return 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) |
| 336 | { |
| 337 | return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, |
| 338 | ext_csd, 512); |
| 339 | } |
| 340 | |
| 341 | int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) |
| 342 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 343 | struct mmc_command cmd = {0}; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 344 | int err; |
| 345 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 346 | cmd.opcode = MMC_SPI_READ_OCR; |
| 347 | cmd.arg = highcap ? (1 << 30) : 0; |
| 348 | cmd.flags = MMC_RSP_SPI_R3; |
| 349 | |
| 350 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 351 | |
| 352 | *ocrp = cmd.resp[1]; |
| 353 | return err; |
| 354 | } |
| 355 | |
| 356 | int mmc_spi_set_crc(struct mmc_host *host, int use_crc) |
| 357 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 358 | struct mmc_command cmd = {0}; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 359 | int err; |
| 360 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 361 | cmd.opcode = MMC_SPI_CRC_ON_OFF; |
| 362 | cmd.flags = MMC_RSP_SPI_R1; |
| 363 | cmd.arg = use_crc; |
| 364 | |
| 365 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 366 | if (!err) |
| 367 | host->use_spi_crc = use_crc; |
| 368 | return err; |
| 369 | } |
| 370 | |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 371 | /** |
| 372 | * mmc_switch - modify EXT_CSD register |
| 373 | * @card: the MMC card associated with the data transfer |
| 374 | * @set: cmd set values |
| 375 | * @index: EXT_CSD register index |
| 376 | * @value: value to program into EXT_CSD register |
| 377 | * @timeout_ms: timeout (ms) for operation performed by register write, |
| 378 | * timeout of zero implies maximum possible timeout |
| 379 | * |
| 380 | * Modifies the EXT_CSD register for selected card. |
| 381 | */ |
| 382 | int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, |
| 383 | unsigned int timeout_ms) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 384 | { |
| 385 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 386 | struct mmc_command cmd = {0}; |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 387 | u32 status; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 388 | |
| 389 | BUG_ON(!card); |
| 390 | BUG_ON(!card->host); |
| 391 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 392 | cmd.opcode = MMC_SWITCH; |
| 393 | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | |
| 394 | (index << 16) | |
| 395 | (value << 8) | |
| 396 | set; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 397 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 398 | cmd.cmd_timeout_ms = timeout_ms; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 399 | |
| 400 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 401 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 402 | return err; |
| 403 | |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 404 | /* Must check status to be sure of no errors */ |
| 405 | do { |
| 406 | err = mmc_send_status(card, &status); |
| 407 | if (err) |
| 408 | return err; |
| 409 | if (card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) |
| 410 | break; |
| 411 | if (mmc_host_is_spi(card->host)) |
| 412 | break; |
| 413 | } while (R1_CURRENT_STATE(status) == 7); |
| 414 | |
| 415 | if (mmc_host_is_spi(card->host)) { |
| 416 | if (status & R1_SPI_ILLEGAL_COMMAND) |
| 417 | return -EBADMSG; |
| 418 | } else { |
| 419 | if (status & 0xFDFFA000) |
| 420 | printk(KERN_WARNING "%s: unexpected status %#x after " |
| 421 | "switch", mmc_hostname(card->host), status); |
| 422 | if (status & R1_SWITCH_ERROR) |
| 423 | return -EBADMSG; |
| 424 | } |
| 425 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 426 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 427 | } |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 428 | EXPORT_SYMBOL_GPL(mmc_switch); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 429 | |
| 430 | int mmc_send_status(struct mmc_card *card, u32 *status) |
| 431 | { |
| 432 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 433 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 434 | |
| 435 | BUG_ON(!card); |
| 436 | BUG_ON(!card->host); |
| 437 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 438 | cmd.opcode = MMC_SEND_STATUS; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 439 | if (!mmc_host_is_spi(card->host)) |
| 440 | cmd.arg = card->rca << 16; |
| 441 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 442 | |
| 443 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 444 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 445 | return err; |
| 446 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 447 | /* NOTE: callers are required to understand the difference |
| 448 | * between "native" and SPI format status words! |
| 449 | */ |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 450 | if (status) |
| 451 | *status = cmd.resp[0]; |
| 452 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 453 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 454 | } |
| 455 | |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 456 | static int |
| 457 | mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode, |
| 458 | u8 len) |
| 459 | { |
| 460 | struct mmc_request mrq; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame^] | 461 | struct mmc_command cmd = {0}; |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 462 | struct mmc_data data; |
| 463 | struct scatterlist sg; |
| 464 | u8 *data_buf; |
| 465 | u8 *test_buf; |
| 466 | int i, err; |
| 467 | static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 }; |
| 468 | static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 }; |
| 469 | |
| 470 | /* dma onto stack is unsafe/nonportable, but callers to this |
| 471 | * routine normally provide temporary on-stack buffers ... |
| 472 | */ |
| 473 | data_buf = kmalloc(len, GFP_KERNEL); |
| 474 | if (!data_buf) |
| 475 | return -ENOMEM; |
| 476 | |
| 477 | if (len == 8) |
| 478 | test_buf = testdata_8bit; |
| 479 | else if (len == 4) |
| 480 | test_buf = testdata_4bit; |
| 481 | else { |
| 482 | printk(KERN_ERR "%s: Invalid bus_width %d\n", |
| 483 | mmc_hostname(host), len); |
| 484 | kfree(data_buf); |
| 485 | return -EINVAL; |
| 486 | } |
| 487 | |
| 488 | if (opcode == MMC_BUS_TEST_W) |
| 489 | memcpy(data_buf, test_buf, len); |
| 490 | |
| 491 | memset(&mrq, 0, sizeof(struct mmc_request)); |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 492 | memset(&data, 0, sizeof(struct mmc_data)); |
| 493 | |
| 494 | mrq.cmd = &cmd; |
| 495 | mrq.data = &data; |
| 496 | cmd.opcode = opcode; |
| 497 | cmd.arg = 0; |
| 498 | |
| 499 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 500 | * rely on callers to never use this with "native" calls for reading |
| 501 | * CSD or CID. Native versions of those commands use the R2 type, |
| 502 | * not R1 plus a data block. |
| 503 | */ |
| 504 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 505 | |
| 506 | data.blksz = len; |
| 507 | data.blocks = 1; |
| 508 | if (opcode == MMC_BUS_TEST_R) |
| 509 | data.flags = MMC_DATA_READ; |
| 510 | else |
| 511 | data.flags = MMC_DATA_WRITE; |
| 512 | |
| 513 | data.sg = &sg; |
| 514 | data.sg_len = 1; |
| 515 | sg_init_one(&sg, data_buf, len); |
| 516 | mmc_wait_for_req(host, &mrq); |
| 517 | err = 0; |
| 518 | if (opcode == MMC_BUS_TEST_R) { |
| 519 | for (i = 0; i < len / 4; i++) |
| 520 | if ((test_buf[i] ^ data_buf[i]) != 0xff) { |
| 521 | err = -EIO; |
| 522 | break; |
| 523 | } |
| 524 | } |
| 525 | kfree(data_buf); |
| 526 | |
| 527 | if (cmd.error) |
| 528 | return cmd.error; |
| 529 | if (data.error) |
| 530 | return data.error; |
| 531 | |
| 532 | return err; |
| 533 | } |
| 534 | |
| 535 | int mmc_bus_test(struct mmc_card *card, u8 bus_width) |
| 536 | { |
| 537 | int err, width; |
| 538 | |
| 539 | if (bus_width == MMC_BUS_WIDTH_8) |
| 540 | width = 8; |
| 541 | else if (bus_width == MMC_BUS_WIDTH_4) |
| 542 | width = 4; |
| 543 | else if (bus_width == MMC_BUS_WIDTH_1) |
| 544 | return 0; /* no need for test */ |
| 545 | else |
| 546 | return -EINVAL; |
| 547 | |
| 548 | /* |
| 549 | * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there |
| 550 | * is a problem. This improves chances that the test will work. |
| 551 | */ |
| 552 | mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width); |
| 553 | err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width); |
| 554 | return err; |
| 555 | } |