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 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 26 | static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card) |
| 27 | { |
| 28 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 29 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 30 | |
| 31 | BUG_ON(!host); |
| 32 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 33 | cmd.opcode = MMC_SELECT_CARD; |
| 34 | |
| 35 | if (card) { |
| 36 | cmd.arg = card->rca << 16; |
| 37 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 38 | } else { |
| 39 | cmd.arg = 0; |
| 40 | cmd.flags = MMC_RSP_NONE | MMC_CMD_AC; |
| 41 | } |
| 42 | |
| 43 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 44 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 45 | return err; |
| 46 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 47 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 48 | } |
| 49 | |
| 50 | int mmc_select_card(struct mmc_card *card) |
| 51 | { |
| 52 | BUG_ON(!card); |
| 53 | |
| 54 | return _mmc_select_card(card->host, card); |
| 55 | } |
| 56 | |
| 57 | int mmc_deselect_cards(struct mmc_host *host) |
| 58 | { |
| 59 | return _mmc_select_card(host, NULL); |
| 60 | } |
| 61 | |
| 62 | int mmc_go_idle(struct mmc_host *host) |
| 63 | { |
| 64 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 65 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 66 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 67 | /* |
| 68 | * Non-SPI hosts need to prevent chipselect going active during |
| 69 | * GO_IDLE; that would put chips into SPI mode. Remind them of |
| 70 | * that in case of hardware that won't pull up DAT3/nCS otherwise. |
| 71 | * |
| 72 | * SPI hosts ignore ios.chip_select; it's managed according to |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 73 | * rules that must accommodate non-MMC slaves which this layer |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 74 | * won't even know about. |
| 75 | */ |
| 76 | if (!mmc_host_is_spi(host)) { |
| 77 | mmc_set_chip_select(host, MMC_CS_HIGH); |
| 78 | mmc_delay(1); |
| 79 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 80 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 81 | cmd.opcode = MMC_GO_IDLE_STATE; |
| 82 | cmd.arg = 0; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 83 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 84 | |
| 85 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 86 | |
| 87 | mmc_delay(1); |
| 88 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 89 | if (!mmc_host_is_spi(host)) { |
| 90 | mmc_set_chip_select(host, MMC_CS_DONTCARE); |
| 91 | mmc_delay(1); |
| 92 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 93 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 94 | host->use_spi_crc = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 95 | |
| 96 | return err; |
| 97 | } |
| 98 | |
| 99 | int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) |
| 100 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 101 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 102 | int i, err = 0; |
| 103 | |
| 104 | BUG_ON(!host); |
| 105 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 106 | cmd.opcode = MMC_SEND_OP_COND; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 107 | cmd.arg = mmc_host_is_spi(host) ? 0 : ocr; |
| 108 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 109 | |
| 110 | for (i = 100; i; i--) { |
| 111 | err = mmc_wait_for_cmd(host, &cmd, 0); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 112 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 113 | break; |
| 114 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 115 | /* if we're just probing, do a single pass */ |
| 116 | if (ocr == 0) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 117 | break; |
| 118 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 119 | /* otherwise wait until reset completes */ |
| 120 | if (mmc_host_is_spi(host)) { |
| 121 | if (!(cmd.resp[0] & R1_SPI_IDLE)) |
| 122 | break; |
| 123 | } else { |
| 124 | if (cmd.resp[0] & MMC_CARD_BUSY) |
| 125 | break; |
| 126 | } |
| 127 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 128 | err = -ETIMEDOUT; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 129 | |
| 130 | mmc_delay(10); |
| 131 | } |
| 132 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 133 | if (rocr && !mmc_host_is_spi(host)) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 134 | *rocr = cmd.resp[0]; |
| 135 | |
| 136 | return err; |
| 137 | } |
| 138 | |
| 139 | int mmc_all_send_cid(struct mmc_host *host, u32 *cid) |
| 140 | { |
| 141 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 142 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 143 | |
| 144 | BUG_ON(!host); |
| 145 | BUG_ON(!cid); |
| 146 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 147 | cmd.opcode = MMC_ALL_SEND_CID; |
| 148 | cmd.arg = 0; |
| 149 | cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; |
| 150 | |
| 151 | err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 152 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 153 | return err; |
| 154 | |
| 155 | memcpy(cid, cmd.resp, sizeof(u32) * 4); |
| 156 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 157 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | int mmc_set_relative_addr(struct mmc_card *card) |
| 161 | { |
| 162 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 163 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 164 | |
| 165 | BUG_ON(!card); |
| 166 | BUG_ON(!card->host); |
| 167 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 168 | cmd.opcode = MMC_SET_RELATIVE_ADDR; |
| 169 | cmd.arg = card->rca << 16; |
| 170 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
| 171 | |
| 172 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 173 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 174 | return err; |
| 175 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 176 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 177 | } |
| 178 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 179 | static int |
| 180 | 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] | 181 | { |
| 182 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 183 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 184 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 185 | BUG_ON(!host); |
| 186 | BUG_ON(!cxd); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 187 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 188 | cmd.opcode = opcode; |
| 189 | cmd.arg = arg; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 190 | cmd.flags = MMC_RSP_R2 | MMC_CMD_AC; |
| 191 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 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 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 196 | memcpy(cxd, cmd.resp, sizeof(u32) * 4); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 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 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 201 | /* |
| 202 | * NOTE: void *buf, caller for the buf is required to use DMA-capable |
| 203 | * buffer or on-stack buffer (with some overhead in callee). |
| 204 | */ |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 205 | static int |
| 206 | mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, |
| 207 | u32 opcode, void *buf, unsigned len) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 208 | { |
Venkatraman S | ad5fd97 | 2011-08-25 00:30:50 +0530 | [diff] [blame] | 209 | struct mmc_request mrq = {NULL}; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 210 | struct mmc_command cmd = {0}; |
Chris Ball | a61ad2b | 2011-04-13 23:46:05 -0400 | [diff] [blame] | 211 | struct mmc_data data = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 212 | struct scatterlist sg; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 213 | void *data_buf; |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 214 | int is_on_stack; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 215 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 216 | is_on_stack = object_is_on_stack(buf); |
| 217 | if (is_on_stack) { |
| 218 | /* |
| 219 | * dma onto stack is unsafe/nonportable, but callers to this |
| 220 | * routine normally provide temporary on-stack buffers ... |
| 221 | */ |
| 222 | data_buf = kmalloc(len, GFP_KERNEL); |
| 223 | if (!data_buf) |
| 224 | return -ENOMEM; |
| 225 | } else |
| 226 | data_buf = buf; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 227 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 228 | mrq.cmd = &cmd; |
| 229 | mrq.data = &data; |
| 230 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 231 | cmd.opcode = opcode; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 232 | cmd.arg = 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 233 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 234 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 235 | * rely on callers to never use this with "native" calls for reading |
| 236 | * CSD or CID. Native versions of those commands use the R2 type, |
| 237 | * not R1 plus a data block. |
| 238 | */ |
| 239 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 240 | |
| 241 | data.blksz = len; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 242 | data.blocks = 1; |
| 243 | data.flags = MMC_DATA_READ; |
| 244 | data.sg = &sg; |
| 245 | data.sg_len = 1; |
| 246 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 247 | sg_init_one(&sg, data_buf, len); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 248 | |
Adrian Hunter | cda56ac2 | 2009-02-10 16:32:33 +0200 | [diff] [blame] | 249 | if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) { |
| 250 | /* |
| 251 | * The spec states that CSR and CID accesses have a timeout |
| 252 | * of 64 clock cycles. |
| 253 | */ |
| 254 | data.timeout_ns = 0; |
| 255 | data.timeout_clks = 64; |
| 256 | } else |
| 257 | mmc_set_data_timeout(&data, card); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 258 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 259 | mmc_wait_for_req(host, &mrq); |
| 260 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 261 | if (is_on_stack) { |
| 262 | memcpy(buf, data_buf, len); |
| 263 | kfree(data_buf); |
| 264 | } |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 265 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 266 | if (cmd.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 267 | return cmd.error; |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 268 | if (data.error) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 269 | return data.error; |
| 270 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 271 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 272 | } |
| 273 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 274 | int mmc_send_csd(struct mmc_card *card, u32 *csd) |
| 275 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 276 | int ret, i; |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 277 | u32 *csd_tmp; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 278 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 279 | if (!mmc_host_is_spi(card->host)) |
| 280 | return mmc_send_cxd_native(card->host, card->rca << 16, |
| 281 | csd, MMC_SEND_CSD); |
| 282 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 283 | csd_tmp = kmalloc(16, GFP_KERNEL); |
| 284 | if (!csd_tmp) |
| 285 | return -ENOMEM; |
| 286 | |
| 287 | 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] | 288 | if (ret) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 289 | goto err; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 290 | |
| 291 | for (i = 0;i < 4;i++) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 292 | csd[i] = be32_to_cpu(csd_tmp[i]); |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 293 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 294 | err: |
| 295 | kfree(csd_tmp); |
| 296 | return ret; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | int mmc_send_cid(struct mmc_host *host, u32 *cid) |
| 300 | { |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 301 | int ret, i; |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 302 | u32 *cid_tmp; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 303 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 304 | if (!mmc_host_is_spi(host)) { |
| 305 | if (!host->card) |
| 306 | return -EINVAL; |
| 307 | return mmc_send_cxd_native(host, host->card->rca << 16, |
| 308 | cid, MMC_SEND_CID); |
| 309 | } |
| 310 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 311 | cid_tmp = kmalloc(16, GFP_KERNEL); |
| 312 | if (!cid_tmp) |
| 313 | return -ENOMEM; |
| 314 | |
| 315 | 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] | 316 | if (ret) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 317 | goto err; |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 318 | |
| 319 | for (i = 0;i < 4;i++) |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 320 | cid[i] = be32_to_cpu(cid_tmp[i]); |
Pierre Ossman | 78e4807 | 2007-10-27 14:14:23 +0200 | [diff] [blame] | 321 | |
Kyungsik Lee | 1a41313 | 2012-08-03 00:58:03 +0000 | [diff] [blame] | 322 | err: |
| 323 | kfree(cid_tmp); |
| 324 | return ret; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd) |
| 328 | { |
| 329 | return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, |
| 330 | ext_csd, 512); |
| 331 | } |
Seungwon Jeon | ce39f9d | 2013-02-06 17:02:46 +0900 | [diff] [blame] | 332 | EXPORT_SYMBOL_GPL(mmc_send_ext_csd); |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 333 | |
| 334 | int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) |
| 335 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 336 | struct mmc_command cmd = {0}; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 337 | int err; |
| 338 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 339 | cmd.opcode = MMC_SPI_READ_OCR; |
| 340 | cmd.arg = highcap ? (1 << 30) : 0; |
| 341 | cmd.flags = MMC_RSP_SPI_R3; |
| 342 | |
| 343 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 344 | |
| 345 | *ocrp = cmd.resp[1]; |
| 346 | return err; |
| 347 | } |
| 348 | |
| 349 | int mmc_spi_set_crc(struct mmc_host *host, int use_crc) |
| 350 | { |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 351 | struct mmc_command cmd = {0}; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 352 | int err; |
| 353 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 354 | cmd.opcode = MMC_SPI_CRC_ON_OFF; |
| 355 | cmd.flags = MMC_RSP_SPI_R1; |
| 356 | cmd.arg = use_crc; |
| 357 | |
| 358 | err = mmc_wait_for_cmd(host, &cmd, 0); |
| 359 | if (!err) |
| 360 | host->use_spi_crc = use_crc; |
| 361 | return err; |
| 362 | } |
| 363 | |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 364 | /** |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 365 | * __mmc_switch - modify EXT_CSD register |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 366 | * @card: the MMC card associated with the data transfer |
| 367 | * @set: cmd set values |
| 368 | * @index: EXT_CSD register index |
| 369 | * @value: value to program into EXT_CSD register |
| 370 | * @timeout_ms: timeout (ms) for operation performed by register write, |
| 371 | * timeout of zero implies maximum possible timeout |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 372 | * @use_busy_signal: use the busy signal as response type |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 373 | * |
| 374 | * Modifies the EXT_CSD register for selected card. |
| 375 | */ |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 376 | int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, |
| 377 | unsigned int timeout_ms, bool use_busy_signal) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 378 | { |
| 379 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 380 | struct mmc_command cmd = {0}; |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 381 | unsigned long timeout; |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 382 | u32 status; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 383 | |
| 384 | BUG_ON(!card); |
| 385 | BUG_ON(!card->host); |
| 386 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 387 | cmd.opcode = MMC_SWITCH; |
| 388 | cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | |
| 389 | (index << 16) | |
| 390 | (value << 8) | |
| 391 | set; |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 392 | cmd.flags = MMC_CMD_AC; |
| 393 | if (use_busy_signal) |
| 394 | cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B; |
| 395 | else |
| 396 | cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1; |
| 397 | |
| 398 | |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 399 | cmd.cmd_timeout_ms = timeout_ms; |
Maya Erez | 775a936 | 2013-04-18 15:41:55 +0300 | [diff] [blame] | 400 | if (index == EXT_CSD_SANITIZE_START) |
| 401 | cmd.sanitize_busy = true; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 402 | |
| 403 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 404 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 405 | return err; |
| 406 | |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 407 | /* No need to check card status in case of unblocking command */ |
| 408 | if (!use_busy_signal) |
| 409 | return 0; |
| 410 | |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 411 | /* Must check status to be sure of no errors */ |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 412 | timeout = jiffies + msecs_to_jiffies(MMC_OPS_TIMEOUT_MS); |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 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; |
Trey Ramsay | 8fee476 | 2012-11-16 09:31:41 -0600 | [diff] [blame] | 421 | |
| 422 | /* Timeout if the device never leaves the program state. */ |
| 423 | if (time_after(jiffies, timeout)) { |
| 424 | pr_err("%s: Card stuck in programming state! %s\n", |
| 425 | mmc_hostname(card->host), __func__); |
| 426 | return -ETIMEDOUT; |
| 427 | } |
Jaehoon Chung | 7435bb7 | 2011-08-10 18:46:28 +0900 | [diff] [blame] | 428 | } while (R1_CURRENT_STATE(status) == R1_STATE_PRG); |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 429 | |
| 430 | if (mmc_host_is_spi(card->host)) { |
| 431 | if (status & R1_SPI_ILLEGAL_COMMAND) |
| 432 | return -EBADMSG; |
| 433 | } else { |
| 434 | if (status & 0xFDFFA000) |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 435 | pr_warning("%s: unexpected status %#x after " |
Adrian Hunter | ef0b27d | 2009-09-22 16:44:37 -0700 | [diff] [blame] | 436 | "switch", mmc_hostname(card->host), status); |
| 437 | if (status & R1_SWITCH_ERROR) |
| 438 | return -EBADMSG; |
| 439 | } |
| 440 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 441 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 442 | } |
Jaehoon Chung | 950d56a | 2012-09-17 08:42:02 +0000 | [diff] [blame] | 443 | EXPORT_SYMBOL_GPL(__mmc_switch); |
| 444 | |
| 445 | int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, |
| 446 | unsigned int timeout_ms) |
| 447 | { |
| 448 | return __mmc_switch(card, set, index, value, timeout_ms, true); |
| 449 | } |
Andrei Warkentin | d3a8d95 | 2011-04-11 16:13:43 -0500 | [diff] [blame] | 450 | EXPORT_SYMBOL_GPL(mmc_switch); |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 451 | |
| 452 | int mmc_send_status(struct mmc_card *card, u32 *status) |
| 453 | { |
| 454 | int err; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 455 | struct mmc_command cmd = {0}; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 456 | |
| 457 | BUG_ON(!card); |
| 458 | BUG_ON(!card->host); |
| 459 | |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 460 | cmd.opcode = MMC_SEND_STATUS; |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 461 | if (!mmc_host_is_spi(card->host)) |
| 462 | cmd.arg = card->rca << 16; |
| 463 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 464 | |
| 465 | err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES); |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 466 | if (err) |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 467 | return err; |
| 468 | |
David Brownell | af51715 | 2007-08-08 09:11:32 -0700 | [diff] [blame] | 469 | /* NOTE: callers are required to understand the difference |
| 470 | * between "native" and SPI format status words! |
| 471 | */ |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 472 | if (status) |
| 473 | *status = cmd.resp[0]; |
| 474 | |
Pierre Ossman | 17b0429 | 2007-07-22 22:18:46 +0200 | [diff] [blame] | 475 | return 0; |
Pierre Ossman | da7fbe5 | 2006-12-24 22:46:55 +0100 | [diff] [blame] | 476 | } |
| 477 | |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 478 | static int |
| 479 | mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode, |
| 480 | u8 len) |
| 481 | { |
Venkatraman S | ad5fd97 | 2011-08-25 00:30:50 +0530 | [diff] [blame] | 482 | struct mmc_request mrq = {NULL}; |
Chris Ball | 1278dba | 2011-04-13 23:40:30 -0400 | [diff] [blame] | 483 | struct mmc_command cmd = {0}; |
Chris Ball | a61ad2b | 2011-04-13 23:46:05 -0400 | [diff] [blame] | 484 | struct mmc_data data = {0}; |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 485 | struct scatterlist sg; |
| 486 | u8 *data_buf; |
| 487 | u8 *test_buf; |
| 488 | int i, err; |
| 489 | static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 }; |
| 490 | static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 }; |
| 491 | |
| 492 | /* dma onto stack is unsafe/nonportable, but callers to this |
| 493 | * routine normally provide temporary on-stack buffers ... |
| 494 | */ |
| 495 | data_buf = kmalloc(len, GFP_KERNEL); |
| 496 | if (!data_buf) |
| 497 | return -ENOMEM; |
| 498 | |
| 499 | if (len == 8) |
| 500 | test_buf = testdata_8bit; |
| 501 | else if (len == 4) |
| 502 | test_buf = testdata_4bit; |
| 503 | else { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 504 | pr_err("%s: Invalid bus_width %d\n", |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 505 | mmc_hostname(host), len); |
| 506 | kfree(data_buf); |
| 507 | return -EINVAL; |
| 508 | } |
| 509 | |
| 510 | if (opcode == MMC_BUS_TEST_W) |
| 511 | memcpy(data_buf, test_buf, len); |
| 512 | |
Aries Lee | 22113ef | 2010-12-15 08:14:24 +0100 | [diff] [blame] | 513 | mrq.cmd = &cmd; |
| 514 | mrq.data = &data; |
| 515 | cmd.opcode = opcode; |
| 516 | cmd.arg = 0; |
| 517 | |
| 518 | /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we |
| 519 | * rely on callers to never use this with "native" calls for reading |
| 520 | * CSD or CID. Native versions of those commands use the R2 type, |
| 521 | * not R1 plus a data block. |
| 522 | */ |
| 523 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
| 524 | |
| 525 | data.blksz = len; |
| 526 | data.blocks = 1; |
| 527 | if (opcode == MMC_BUS_TEST_R) |
| 528 | data.flags = MMC_DATA_READ; |
| 529 | else |
| 530 | data.flags = MMC_DATA_WRITE; |
| 531 | |
| 532 | data.sg = &sg; |
| 533 | data.sg_len = 1; |
| 534 | sg_init_one(&sg, data_buf, len); |
| 535 | mmc_wait_for_req(host, &mrq); |
| 536 | err = 0; |
| 537 | if (opcode == MMC_BUS_TEST_R) { |
| 538 | for (i = 0; i < len / 4; i++) |
| 539 | if ((test_buf[i] ^ data_buf[i]) != 0xff) { |
| 540 | err = -EIO; |
| 541 | break; |
| 542 | } |
| 543 | } |
| 544 | kfree(data_buf); |
| 545 | |
| 546 | if (cmd.error) |
| 547 | return cmd.error; |
| 548 | if (data.error) |
| 549 | return data.error; |
| 550 | |
| 551 | return err; |
| 552 | } |
| 553 | |
| 554 | int mmc_bus_test(struct mmc_card *card, u8 bus_width) |
| 555 | { |
| 556 | int err, width; |
| 557 | |
| 558 | if (bus_width == MMC_BUS_WIDTH_8) |
| 559 | width = 8; |
| 560 | else if (bus_width == MMC_BUS_WIDTH_4) |
| 561 | width = 4; |
| 562 | else if (bus_width == MMC_BUS_WIDTH_1) |
| 563 | return 0; /* no need for test */ |
| 564 | else |
| 565 | return -EINVAL; |
| 566 | |
| 567 | /* |
| 568 | * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there |
| 569 | * is a problem. This improves chances that the test will work. |
| 570 | */ |
| 571 | mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width); |
| 572 | err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width); |
| 573 | return err; |
| 574 | } |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 575 | |
| 576 | int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status) |
| 577 | { |
| 578 | struct mmc_command cmd = {0}; |
| 579 | unsigned int opcode; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 580 | int err; |
| 581 | |
Jaehoon Chung | 2378975 | 2012-03-12 08:57:27 +0900 | [diff] [blame] | 582 | if (!card->ext_csd.hpi) { |
| 583 | pr_warning("%s: Card didn't support HPI command\n", |
| 584 | mmc_hostname(card->host)); |
| 585 | return -EINVAL; |
| 586 | } |
| 587 | |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 588 | opcode = card->ext_csd.hpi_cmd; |
| 589 | if (opcode == MMC_STOP_TRANSMISSION) |
Jaehoon Chung | 2378975 | 2012-03-12 08:57:27 +0900 | [diff] [blame] | 590 | cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 591 | else if (opcode == MMC_SEND_STATUS) |
Jaehoon Chung | 2378975 | 2012-03-12 08:57:27 +0900 | [diff] [blame] | 592 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 593 | |
| 594 | cmd.opcode = opcode; |
| 595 | cmd.arg = card->rca << 16 | 1; |
Jaehoon Chung | eb0d8f1 | 2011-10-18 01:26:42 -0400 | [diff] [blame] | 596 | |
| 597 | err = mmc_wait_for_cmd(card->host, &cmd, 0); |
| 598 | if (err) { |
| 599 | pr_warn("%s: error %d interrupting operation. " |
| 600 | "HPI command response %#x\n", mmc_hostname(card->host), |
| 601 | err, cmd.resp[0]); |
| 602 | return err; |
| 603 | } |
| 604 | if (status) |
| 605 | *status = cmd.resp[0]; |
| 606 | |
| 607 | return 0; |
| 608 | } |