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> |
Paul Gortmaker | 3ef77af | 2011-07-10 12:42:00 -0400 | [diff] [blame] | 13 | #include <linux/export.h> |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 14 | #include <linux/types.h> |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 15 | #include <linux/scatterlist.h> |
| 16 | |
| 17 | #include <linux/mmc/host.h> |
| 18 | #include <linux/mmc/card.h> |
| 19 | #include <linux/mmc/mmc.h> |
| 20 | |
| 21 | #include "core.h" |
| 22 | #include "mmc_ops.h" |
| 23 | |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 24 | #define MMC_OPS_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ |
| 25 | |
Seungwon Jeon | a27fbf2 | 2013-09-04 21:21:05 +0900 | [diff] [blame] | 26 | static inline int __mmc_send_status(struct mmc_card *card, u32 *status, |
| 27 | bool ignore_crc) |
| 28 | { |
| 29 | int err; |
| 30 | struct mmc_command cmd = {0}; |
| 31 | |
| 32 | BUG_ON(!card); |
| 33 | BUG_ON(!card->host); |
| 34 | |
| 35 | cmd.opcode = MMC_SEND_STATUS; |
| 36 | if (!mmc_host_is_spi(card->host)) |
| 37 | cmd.arg = card->rca << 16; |
| 38 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; |
| 39 | if (ignore_crc) |
| 40 | cmd.flags &= ~MMC_RSP_CRC; |
| 41 | |
| 42 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
| 43 | if (err) |
| 44 | return err; |
| 45 | |
| 46 | /* NOTE: callers are required to understand the difference |
| 47 | * between "native" and SPI format status words! |
| 48 | */ |
| 49 | if (status) |
| 50 | *status = cmd.resp[0]; |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | int mmc_send_status(struct mmc_card *card, u32 *status) |
| 56 | { |
| 57 | return __mmc_send_status(card, status, false); |
| 58 | } |
| 59 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 60 | static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card) |
| 61 | { |
| 62 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 63 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 64 | |
| 65 | BUG_ON(!host); |
| 66 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 67 | cmd.opcode = MMC_SELECT_CARD; |
| 68 | |
| 69 | if (card) { |
| 70 | cmd.arg = card->rca << 16; |
| 71 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 72 | } else { |
| 73 | cmd.arg = 0; |
| 74 | cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; |
| 75 | } |
| 76 | |
| 77 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 78 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 79 | return err; |
| 80 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 81 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | int mmc_select_card(struct mmc_card *card) |
| 85 | { |
| 86 | BUG_ON(!card); |
| 87 | |
| 88 | return _mmc_select_card(card->host, card); |
| 89 | } |
| 90 | |
| 91 | int mmc_deselect_cards(struct mmc_host *host) |
| 92 | { |
| 93 | return _mmc_select_card(host, NULL); |
| 94 | } |
| 95 | |
| 96 | int mmc_go_idle(struct mmc_host *host) |
| 97 | { |
| 98 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 99 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 100 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 101 | /* |
| 102 | * Non-SPI hosts need to prevent chipselect going active during |
| 103 | * GO_IDLE; that would put chips into SPI mode. Remind them of |
| 104 | * that in case of hardware that won't pull up DAT3/nCS otherwise. |
| 105 | * |
| 106 | * SPI hosts ignore ios.chip_select; it's managed according to |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 107 | * rules that must accommodate non-MMC slaves which this layer |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 108 | * won't even know about. |
| 109 | */ |
| 110 | if (!mmc_host_is_spi(host)) { |
| 111 | mmc_set_chip_select(host, MMC_CS_HIGH); |
| 112 | mmc_delay(1); |
| 113 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 114 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 115 | cmd.opcode = MMC_GO_IDLE_STATE; |
| 116 | cmd.arg = 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 117 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 118 | |
| 119 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 120 | |
| 121 | mmc_delay(1); |
| 122 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 123 | if (!mmc_host_is_spi(host)) { |
| 124 | mmc_set_chip_select(host, MMC_CS_DONTCARE); |
| 125 | mmc_delay(1); |
| 126 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 127 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 128 | host->use_spi_crc = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 129 | |
| 130 | return err; |
| 131 | } |
| 132 | |
| 133 | int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) |
| 134 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 135 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 136 | int i, err = 0; |
| 137 | |
| 138 | BUG_ON(!host); |
| 139 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 140 | cmd.opcode = MMC_SEND_OP_COND; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 141 | cmd.arg = mmc_host_is_spi(host) ? 0 : ocr; |
| 142 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 143 | |
| 144 | for (i = 100; i; i--) { |
| 145 | err = mmc_wait_for_cmd(host, &cmd, 0); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 146 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 147 | break; |
| 148 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 149 | /* if we're just probing, do a single pass */ |
| 150 | if (ocr == 0) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 151 | break; |
| 152 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 153 | /* otherwise wait until reset completes */ |
| 154 | if (mmc_host_is_spi(host)) { |
| 155 | if (!(cmd.resp[0] & R1_SPI_IDLE)) |
| 156 | break; |
| 157 | } else { |
| 158 | if (cmd.resp[0] & MMC_CARD_BUSY) |
| 159 | break; |
| 160 | } |
| 161 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 162 | err = -ETIMEDOUT; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 163 | |
| 164 | mmc_delay(10); |
| 165 | } |
| 166 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 167 | if (rocr && !mmc_host_is_spi(host)) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 168 | *rocr = cmd.resp[0]; |
| 169 | |
| 170 | return err; |
| 171 | } |
| 172 | |
| 173 | int mmc_all_send_cid(struct mmc_host *host, u32 *cid) |
| 174 | { |
| 175 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 176 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 177 | |
| 178 | BUG_ON(!host); |
| 179 | BUG_ON(!cid); |
| 180 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 181 | cmd.opcode = MMC_ALL_SEND_CID; |
| 182 | cmd.arg = 0; |
| 183 | cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; |
| 184 | |
| 185 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 186 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 187 | return err; |
| 188 | |
| 189 | memcpy(cid, cmd.resp, sizeof(u32) * 4); |
| 190 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 191 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | int mmc_set_relative_addr(struct mmc_card *card) |
| 195 | { |
| 196 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 197 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 198 | |
| 199 | BUG_ON(!card); |
| 200 | BUG_ON(!card->host); |
| 201 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 202 | cmd.opcode = MMC_SET_RELATIVE_ADDR; |
| 203 | cmd.arg = card->rca << 16; |
| 204 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 205 | |
| 206 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 207 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 208 | return err; |
| 209 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 210 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 211 | } |
| 212 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 213 | static int |
| 214 | 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] | 215 | { |
| 216 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 217 | struct mmc_command cmd = {0}; |
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 | BUG_ON(!host); |
| 220 | BUG_ON(!cxd); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 221 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 222 | cmd.opcode = opcode; |
| 223 | cmd.arg = arg; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 224 | cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; |
| 225 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 226 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 227 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 228 | return err; |
| 229 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 230 | memcpy(cxd, cmd.resp, sizeof(u32) * 4); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 231 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 232 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 233 | } |
| 234 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 235 | /* |
| 236 | * NOTE: void *buf, caller for the buf is required to use DMA-capable |
| 237 | * buffer or on-stack buffer (with some overhead in callee). |
| 238 | */ |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 239 | static int |
| 240 | mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, |
| 241 | u32 opcode, void *buf, unsigned len) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 242 | { |
Venkatraman S | ad5fd97 | 2011-08-25 00:30:50 +0530 | [diff] [blame] | 243 | struct mmc_request mrq = {NULL}; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 244 | struct mmc_command cmd = {0}; |
Chris Ball | a61ad2b | 2011-04-13 23:46:05 -0400 | [diff] [blame] | 245 | struct mmc_data data = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 246 | struct scatterlist sg; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 247 | void *data_buf; |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 248 | int is_on_stack; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 249 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 250 | is_on_stack = object_is_on_stack(buf); |
| 251 | if (is_on_stack) { |
| 252 | /* |
| 253 | * dma onto stack is unsafe/nonportable, but callers to this |
| 254 | * routine normally provide temporary on-stack buffers ... |
| 255 | */ |
| 256 | data_buf = kmalloc(len, GFP_KERNEL); |
| 257 | if (!data_buf) |
| 258 | return -ENOMEM; |
| 259 | } else |
| 260 | data_buf = buf; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 261 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 262 | mrq.cmd = &cmd; |
| 263 | mrq.data = &data; |
| 264 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 265 | cmd.opcode = opcode; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 266 | cmd.arg = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 267 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 268 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 269 | * rely on callers to never use this with "native" calls for reading |
| 270 | * CSD or CID. Native versions of those commands use the R2 type, |
| 271 | * not R1 plus a data block. |
| 272 | */ |
| 273 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 274 | |
| 275 | data.blksz = len; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 276 | data.blocks = 1; |
| 277 | data.flags = MMC_DATA_READ; |
| 278 | data.sg = &sg; |
| 279 | data.sg_len = 1; |
| 280 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 281 | sg_init_one(&sg, data_buf, len); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 282 | |
Adrian Hunter | cda56ac2 | 2009-02-10 16:32:33 +0200 | [diff] [blame] | 283 | if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) { |
| 284 | /* |
| 285 | * The spec states that CSR and CID accesses have a timeout |
| 286 | * of 64 clock cycles. |
| 287 | */ |
| 288 | data.timeout_ns = 0; |
| 289 | data.timeout_clks = 64; |
| 290 | } else |
| 291 | mmc_set_data_timeout(&data, card); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 292 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 293 | mmc_wait_for_req(host, &mrq); |
| 294 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 295 | if (is_on_stack) { |
| 296 | memcpy(buf, data_buf, len); |
| 297 | kfree(data_buf); |
| 298 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 299 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 300 | if (cmd.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 301 | return cmd.error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 302 | if (data.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 303 | return data.error; |
| 304 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 305 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 306 | } |
| 307 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 308 | int mmc_send_csd(struct mmc_card *card, u32 *csd) |
| 309 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 310 | int ret, i; |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 311 | u32 *csd_tmp; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 312 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 313 | if (!mmc_host_is_spi(card->host)) |
| 314 | return mmc_send_cxd_native(card->host, card->rca << 16, |
| 315 | csd, MMC_SEND_CSD); |
| 316 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 317 | csd_tmp = kmalloc(16, GFP_KERNEL); |
| 318 | if (!csd_tmp) |
| 319 | return -ENOMEM; |
| 320 | |
| 321 | ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd_tmp, 16); |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 322 | if (ret) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 323 | goto err; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 324 | |
| 325 | for (i = 0;i < 4;i++) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 326 | csd[i] = be32_to_cpu(csd_tmp[i]); |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 327 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 328 | err: |
| 329 | kfree(csd_tmp); |
| 330 | return ret; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | int mmc_send_cid(struct mmc_host *host, u32 *cid) |
| 334 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 335 | int ret, i; |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 336 | u32 *cid_tmp; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 337 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 338 | if (!mmc_host_is_spi(host)) { |
| 339 | if (!host->card) |
| 340 | return -EINVAL; |
| 341 | return mmc_send_cxd_native(host, host->card->rca << 16, |
| 342 | cid, MMC_SEND_CID); |
| 343 | } |
| 344 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 345 | cid_tmp = kmalloc(16, GFP_KERNEL); |
| 346 | if (!cid_tmp) |
| 347 | return -ENOMEM; |
| 348 | |
| 349 | ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid_tmp, 16); |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 350 | if (ret) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 351 | goto err; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 352 | |
| 353 | for (i = 0;i < 4;i++) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 354 | cid[i] = be32_to_cpu(cid_tmp[i]); |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 355 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 356 | err: |
| 357 | kfree(cid_tmp); |
| 358 | return ret; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) |
| 362 | { |
| 363 | return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, |
| 364 | ext_csd, 512); |
| 365 | } |
Seungwon Jeon | ce39f9d | 2013-02-06 17:02:46 +0900 | [diff] [blame] | 366 | EXPORT_SYMBOL_GPL(mmc_send_ext_csd); |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 367 | |
| 368 | int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) |
| 369 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 370 | struct mmc_command cmd = {0}; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 371 | int err; |
| 372 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 373 | cmd.opcode = MMC_SPI_READ_OCR; |
| 374 | cmd.arg = highcap ? (1 << 30) : 0; |
| 375 | cmd.flags = MMC_RSP_SPI_R3; |
| 376 | |
| 377 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 378 | |
| 379 | *ocrp = cmd.resp[1]; |
| 380 | return err; |
| 381 | } |
| 382 | |
| 383 | int mmc_spi_set_crc(struct mmc_host *host, int use_crc) |
| 384 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 385 | struct mmc_command cmd = {0}; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 386 | int err; |
| 387 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 388 | cmd.opcode = MMC_SPI_CRC_ON_OFF; |
| 389 | cmd.flags = MMC_RSP_SPI_R1; |
| 390 | cmd.arg = use_crc; |
| 391 | |
| 392 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 393 | if (!err) |
| 394 | host->use_spi_crc = use_crc; |
| 395 | return err; |
| 396 | } |
| 397 | |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 398 | /** |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 399 | * __mmc_switch - modify EXT_CSD register |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 400 | * @card: the MMC card associated with the data transfer |
| 401 | * @set: cmd set values |
| 402 | * @index: EXT_CSD register index |
| 403 | * @value: value to program into EXT_CSD register |
| 404 | * @timeout_ms: timeout (ms) for operation performed by register write, |
| 405 | * timeout of zero implies maximum possible timeout |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 406 | * @use_busy_signal: use the busy signal as response type |
Ulf Hansson | 878e200 | 2013-09-09 11:57:57 +0200 | [diff] [blame] | 407 | * @send_status: send status cmd to poll for busy |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 408 | * @ignore_crc: ignore CRC errors when sending status cmd to poll for busy |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 409 | * |
| 410 | * Modifies the EXT_CSD register for selected card. |
| 411 | */ |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 412 | int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 413 | unsigned int timeout_ms, bool use_busy_signal, bool send_status, |
| 414 | bool ignore_crc) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 415 | { |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 416 | struct mmc_host *host = card->host; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 417 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 418 | struct mmc_command cmd = {0}; |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 419 | unsigned long timeout; |
Ulf Hansson | ecd3a7d | 2013-10-28 02:51:41 +0100 | [diff] [blame] | 420 | u32 status = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 421 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 422 | cmd.opcode = MMC_SWITCH; |
| 423 | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | |
| 424 | (index << 16) | |
| 425 | (value << 8) | |
| 426 | set; |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 427 | cmd.flags = MMC_CMD_AC; |
| 428 | if (use_busy_signal) |
| 429 | cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B; |
| 430 | else |
| 431 | cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1; |
| 432 | |
| 433 | |
Ulf Hansson | 1d4d774 | 2014-01-08 15:06:08 +0100 | [diff] [blame] | 434 | cmd.busy_timeout = timeout_ms; |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 435 | if (index == EXT_CSD_SANITIZE_START) |
| 436 | cmd.sanitize_busy = true; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 437 | |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 438 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 439 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 440 | return err; |
| 441 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 442 | /* No need to check card status in case of unblocking command */ |
| 443 | if (!use_busy_signal) |
| 444 | return 0; |
| 445 | |
Seungwon Jeon | a27fbf2 | 2013-09-04 21:21:05 +0900 | [diff] [blame] | 446 | /* |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 447 | * CRC errors shall only be ignored in cases were CMD13 is used to poll |
| 448 | * to detect busy completion. |
Seungwon Jeon | a27fbf2 | 2013-09-04 21:21:05 +0900 | [diff] [blame] | 449 | */ |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 450 | if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 451 | ignore_crc = false; |
Seungwon Jeon | a27fbf2 | 2013-09-04 21:21:05 +0900 | [diff] [blame] | 452 | |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 453 | /* Must check status to be sure of no errors. */ |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 454 | timeout = jiffies + msecs_to_jiffies(MMC_OPS_TIMEOUT_MS); |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 455 | do { |
Ulf Hansson | 878e200 | 2013-09-09 11:57:57 +0200 | [diff] [blame] | 456 | if (send_status) { |
| 457 | err = __mmc_send_status(card, &status, ignore_crc); |
| 458 | if (err) |
| 459 | return err; |
| 460 | } |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 461 | if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 462 | break; |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 463 | if (mmc_host_is_spi(host)) |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 464 | break; |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 465 | |
Ulf Hansson | 878e200 | 2013-09-09 11:57:57 +0200 | [diff] [blame] | 466 | /* |
| 467 | * We are not allowed to issue a status command and the host |
| 468 | * does'nt support MMC_CAP_WAIT_WHILE_BUSY, then we can only |
| 469 | * rely on waiting for the stated timeout to be sufficient. |
| 470 | */ |
| 471 | if (!send_status) { |
| 472 | mmc_delay(timeout_ms); |
| 473 | return 0; |
| 474 | } |
| 475 | |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 476 | /* Timeout if the device never leaves the program state. */ |
| 477 | if (time_after(jiffies, timeout)) { |
| 478 | pr_err("%s: Card stuck in programming state! %s\n", |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 479 | mmc_hostname(host), __func__); |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 480 | return -ETIMEDOUT; |
| 481 | } |
Jaehoon Chung | 7435bb7 | 2011-08-10 18:46:28 +0900 | [diff] [blame] | 482 | } while (R1_CURRENT_STATE(status) == R1_STATE_PRG); |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 483 | |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 484 | if (mmc_host_is_spi(host)) { |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 485 | if (status & R1_SPI_ILLEGAL_COMMAND) |
| 486 | return -EBADMSG; |
| 487 | } else { |
| 488 | if (status & 0xFDFFA000) |
Ulf Hansson | 636bd13 | 2014-01-28 14:05:39 +0100 | [diff] [blame^] | 489 | pr_warn("%s: unexpected status %#x after switch\n", |
| 490 | mmc_hostname(host), status); |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 491 | if (status & R1_SWITCH_ERROR) |
| 492 | return -EBADMSG; |
| 493 | } |
| 494 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 495 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 496 | } |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 497 | EXPORT_SYMBOL_GPL(__mmc_switch); |
| 498 | |
| 499 | int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, |
| 500 | unsigned int timeout_ms) |
| 501 | { |
Ulf Hansson | 4509f8477 | 2014-01-08 16:09:33 +0100 | [diff] [blame] | 502 | return __mmc_switch(card, set, index, value, timeout_ms, true, true, |
| 503 | false); |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 504 | } |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 505 | EXPORT_SYMBOL_GPL(mmc_switch); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 506 | |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 507 | static int |
| 508 | mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode, |
| 509 | u8 len) |
| 510 | { |
Venkatraman S | ad5fd97 | 2011-08-25 00:30:50 +0530 | [diff] [blame] | 511 | struct mmc_request mrq = {NULL}; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 512 | struct mmc_command cmd = {0}; |
Chris Ball | a61ad2b | 2011-04-13 23:46:05 -0400 | [diff] [blame] | 513 | struct mmc_data data = {0}; |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 514 | struct scatterlist sg; |
| 515 | u8 *data_buf; |
| 516 | u8 *test_buf; |
| 517 | int i, err; |
| 518 | static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 }; |
| 519 | static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 }; |
| 520 | |
| 521 | /* dma onto stack is unsafe/nonportable, but callers to this |
| 522 | * routine normally provide temporary on-stack buffers ... |
| 523 | */ |
| 524 | data_buf = kmalloc(len, GFP_KERNEL); |
| 525 | if (!data_buf) |
| 526 | return -ENOMEM; |
| 527 | |
| 528 | if (len == 8) |
| 529 | test_buf = testdata_8bit; |
| 530 | else if (len == 4) |
| 531 | test_buf = testdata_4bit; |
| 532 | else { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 533 | pr_err("%s: Invalid bus_width %d\n", |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 534 | mmc_hostname(host), len); |
| 535 | kfree(data_buf); |
| 536 | return -EINVAL; |
| 537 | } |
| 538 | |
| 539 | if (opcode == MMC_BUS_TEST_W) |
| 540 | memcpy(data_buf, test_buf, len); |
| 541 | |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 542 | mrq.cmd = &cmd; |
| 543 | mrq.data = &data; |
| 544 | cmd.opcode = opcode; |
| 545 | cmd.arg = 0; |
| 546 | |
| 547 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 548 | * rely on callers to never use this with "native" calls for reading |
| 549 | * CSD or CID. Native versions of those commands use the R2 type, |
| 550 | * not R1 plus a data block. |
| 551 | */ |
| 552 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 553 | |
| 554 | data.blksz = len; |
| 555 | data.blocks = 1; |
| 556 | if (opcode == MMC_BUS_TEST_R) |
| 557 | data.flags = MMC_DATA_READ; |
| 558 | else |
| 559 | data.flags = MMC_DATA_WRITE; |
| 560 | |
| 561 | data.sg = &sg; |
| 562 | data.sg_len = 1; |
Minjian Wu | 84532e3 | 2013-08-24 23:25:12 -0400 | [diff] [blame] | 563 | mmc_set_data_timeout(&data, card); |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 564 | sg_init_one(&sg, data_buf, len); |
| 565 | mmc_wait_for_req(host, &mrq); |
| 566 | err = 0; |
| 567 | if (opcode == MMC_BUS_TEST_R) { |
| 568 | for (i = 0; i < len / 4; i++) |
| 569 | if ((test_buf[i] ^ data_buf[i]) != 0xff) { |
| 570 | err = -EIO; |
| 571 | break; |
| 572 | } |
| 573 | } |
| 574 | kfree(data_buf); |
| 575 | |
| 576 | if (cmd.error) |
| 577 | return cmd.error; |
| 578 | if (data.error) |
| 579 | return data.error; |
| 580 | |
| 581 | return err; |
| 582 | } |
| 583 | |
| 584 | int mmc_bus_test(struct mmc_card *card, u8 bus_width) |
| 585 | { |
| 586 | int err, width; |
| 587 | |
| 588 | if (bus_width == MMC_BUS_WIDTH_8) |
| 589 | width = 8; |
| 590 | else if (bus_width == MMC_BUS_WIDTH_4) |
| 591 | width = 4; |
| 592 | else if (bus_width == MMC_BUS_WIDTH_1) |
| 593 | return 0; /* no need for test */ |
| 594 | else |
| 595 | return -EINVAL; |
| 596 | |
| 597 | /* |
| 598 | * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there |
| 599 | * is a problem. This improves chances that the test will work. |
| 600 | */ |
| 601 | mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width); |
| 602 | err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width); |
| 603 | return err; |
| 604 | } |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 605 | |
| 606 | int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status) |
| 607 | { |
| 608 | struct mmc_command cmd = {0}; |
| 609 | unsigned int opcode; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 610 | int err; |
| 611 | |
Jaehoon Chung | 2378975 | 2012-03-12 08:57:27 +0900 | [diff] [blame] | 612 | if (!card->ext_csd.hpi) { |
| 613 | pr_warning("%s: Card didn't support HPI command\n", |
| 614 | mmc_hostname(card->host)); |
| 615 | return -EINVAL; |
| 616 | } |
| 617 | |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 618 | opcode = card->ext_csd.hpi_cmd; |
| 619 | if (opcode == MMC_STOP_TRANSMISSION) |
Jaehoon Chung | 2378975 | 2012-03-12 08:57:27 +0900 | [diff] [blame] | 620 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 621 | else if (opcode == MMC_SEND_STATUS) |
Jaehoon Chung | 2378975 | 2012-03-12 08:57:27 +0900 | [diff] [blame] | 622 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 623 | |
| 624 | cmd.opcode = opcode; |
| 625 | cmd.arg = card->rca << 16 | 1; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 626 | |
| 627 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 628 | if (err) { |
| 629 | pr_warn("%s: error %d interrupting operation. " |
| 630 | "HPI command response %#x\n", mmc_hostname(card->host), |
| 631 | err, cmd.resp[0]); |
| 632 | return err; |
| 633 | } |
| 634 | if (status) |
| 635 | *status = cmd.resp[0]; |
| 636 | |
| 637 | return 0; |
| 638 | } |