Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 1 | /* |
| 2 | * SD/MMC Greybus driver. |
| 3 | * |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 4 | * Copyright 2014-2015 Google Inc. |
| 5 | * Copyright 2014-2015 Linaro Ltd. |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 6 | * |
| 7 | * Released under the GPLv2 only. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/kernel.h> |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 11 | #include <linux/mmc/core.h> |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 12 | #include <linux/mmc/host.h> |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 13 | #include <linux/mmc/mmc.h> |
| 14 | #include <linux/scatterlist.h> |
| 15 | #include <linux/workqueue.h> |
Alex Elder | e1e9dbd | 2014-10-01 21:54:11 -0500 | [diff] [blame] | 16 | |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 17 | #include "greybus.h" |
| 18 | |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 19 | struct gb_sdio_host { |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 20 | struct gb_connection *connection; |
| 21 | u8 version_major; |
| 22 | u8 version_minor; |
| 23 | struct mmc_host *mmc; |
| 24 | struct mmc_request *mrq; |
| 25 | struct mutex lock; /* lock for this host */ |
| 26 | size_t data_max; |
| 27 | void *xfer_buffer; |
| 28 | spinlock_t xfer; /* lock to cancel ongoing transfer */ |
| 29 | bool xfer_stop; |
| 30 | struct work_struct mrqwork; |
Rui Miguel Silva | c36d31c | 2015-07-02 19:11:31 +0100 | [diff] [blame] | 31 | u8 queued_events; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 32 | bool removed; |
| 33 | bool card_present; |
| 34 | bool read_only; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 35 | }; |
| 36 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 37 | static struct workqueue_struct *gb_sdio_mrq_workqueue; |
| 38 | |
| 39 | /* Define get_version() routine */ |
| 40 | define_get_version(gb_sdio_host, SDIO); |
| 41 | |
Rui Miguel Silva | ef0cc0e | 2015-07-02 19:11:30 +0100 | [diff] [blame] | 42 | #define GB_SDIO_RSP_R1_R5_R6_R7 (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \ |
| 43 | GB_SDIO_RSP_OPCODE) |
| 44 | #define GB_SDIO_RSP_R3_R4 (GB_SDIO_RSP_PRESENT) |
| 45 | #define GB_SDIO_RSP_R2 (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \ |
| 46 | GB_SDIO_RSP_136) |
| 47 | #define GB_SDIO_RSP_R1B (GB_SDIO_RSP_PRESENT | GB_SDIO_RSP_CRC | \ |
| 48 | GB_SDIO_RSP_OPCODE | GB_SDIO_RSP_BUSY) |
| 49 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 50 | static void _gb_sdio_set_host_caps(struct gb_sdio_host *host, u32 r) |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 51 | { |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 52 | u32 caps = 0; |
| 53 | u32 caps2 = 0; |
| 54 | |
| 55 | caps = (r & GB_SDIO_CAP_NONREMOVABLE ? MMC_CAP_NONREMOVABLE : 0) | |
| 56 | (r & GB_SDIO_CAP_4_BIT_DATA ? MMC_CAP_4_BIT_DATA : 0) | |
| 57 | (r & GB_SDIO_CAP_8_BIT_DATA ? MMC_CAP_8_BIT_DATA : 0) | |
| 58 | (r & GB_SDIO_CAP_MMC_HS ? MMC_CAP_MMC_HIGHSPEED : 0) | |
| 59 | (r & GB_SDIO_CAP_SD_HS ? MMC_CAP_SD_HIGHSPEED : 0) | |
| 60 | (r & GB_SDIO_CAP_ERASE ? MMC_CAP_ERASE : 0) | |
| 61 | (r & GB_SDIO_CAP_1_2V_DDR ? MMC_CAP_1_2V_DDR : 0) | |
| 62 | (r & GB_SDIO_CAP_1_8V_DDR ? MMC_CAP_1_8V_DDR : 0) | |
| 63 | (r & GB_SDIO_CAP_POWER_OFF_CARD ? MMC_CAP_POWER_OFF_CARD : 0) | |
| 64 | (r & GB_SDIO_CAP_UHS_SDR12 ? MMC_CAP_UHS_SDR12 : 0) | |
| 65 | (r & GB_SDIO_CAP_UHS_SDR25 ? MMC_CAP_UHS_SDR25 : 0) | |
| 66 | (r & GB_SDIO_CAP_UHS_SDR50 ? MMC_CAP_UHS_SDR50 : 0) | |
| 67 | (r & GB_SDIO_CAP_UHS_SDR104 ? MMC_CAP_UHS_SDR104 : 0) | |
| 68 | (r & GB_SDIO_CAP_UHS_DDR50 ? MMC_CAP_UHS_DDR50 : 0) | |
| 69 | (r & GB_SDIO_CAP_DRIVER_TYPE_A ? MMC_CAP_DRIVER_TYPE_A : 0) | |
| 70 | (r & GB_SDIO_CAP_DRIVER_TYPE_C ? MMC_CAP_DRIVER_TYPE_C : 0) | |
| 71 | (r & GB_SDIO_CAP_DRIVER_TYPE_D ? MMC_CAP_DRIVER_TYPE_D : 0); |
| 72 | |
| 73 | caps2 = (r & GB_SDIO_CAP_HS200_1_2V ? MMC_CAP2_HS200_1_2V_SDR : 0) | |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 74 | #ifdef MMC_HS400_SUPPORTED |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 75 | (r & GB_SDIO_CAP_HS400_1_2V ? MMC_CAP2_HS400_1_2V : 0) | |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 76 | (r & GB_SDIO_CAP_HS400_1_8V ? MMC_CAP2_HS400_1_8V : 0) | |
| 77 | #endif |
| 78 | (r & GB_SDIO_CAP_HS200_1_8V ? MMC_CAP2_HS200_1_8V_SDR : 0); |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 79 | |
| 80 | host->mmc->caps = caps; |
| 81 | host->mmc->caps2 = caps2; |
| 82 | |
| 83 | if (caps & MMC_CAP_NONREMOVABLE) |
| 84 | host->card_present = true; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 85 | } |
| 86 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 87 | static int gb_sdio_get_caps(struct gb_sdio_host *host) |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 88 | { |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 89 | struct gb_sdio_get_caps_response response; |
| 90 | struct mmc_host *mmc = host->mmc; |
| 91 | u16 data_max; |
| 92 | u32 blksz; |
| 93 | u32 r; |
| 94 | int ret; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 95 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 96 | ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_GET_CAPABILITIES, |
| 97 | NULL, 0, &response, sizeof(response)); |
| 98 | if (ret < 0) |
| 99 | return ret; |
| 100 | r = le32_to_cpu(response.caps); |
| 101 | |
| 102 | _gb_sdio_set_host_caps(host, r); |
| 103 | |
| 104 | /* get the max block size that could fit our payload */ |
| 105 | data_max = gb_operation_get_payload_size_max(host->connection); |
| 106 | data_max = min(data_max - sizeof(struct gb_sdio_transfer_request), |
| 107 | data_max - sizeof(struct gb_sdio_transfer_response)); |
| 108 | |
| 109 | blksz = min(le16_to_cpu(response.max_blk_size), data_max); |
| 110 | blksz = max_t(u32, 512, blksz); |
| 111 | |
| 112 | mmc->max_blk_size = rounddown_pow_of_two(blksz); |
| 113 | mmc->max_blk_count = le16_to_cpu(response.max_blk_count); |
| 114 | host->data_max = data_max; |
| 115 | |
| 116 | /* get ocr supported values */ |
| 117 | mmc->ocr_avail = le32_to_cpu(response.ocr); |
| 118 | mmc->ocr_avail_sdio = mmc->ocr_avail; |
| 119 | mmc->ocr_avail_sd = mmc->ocr_avail; |
| 120 | mmc->ocr_avail_mmc = mmc->ocr_avail; |
| 121 | |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 122 | return 0; |
| 123 | } |
| 124 | |
Rui Miguel Silva | c36d31c | 2015-07-02 19:11:31 +0100 | [diff] [blame] | 125 | static void _gb_queue_event(struct gb_sdio_host *host, u8 event) |
| 126 | { |
| 127 | if (event & GB_SDIO_CARD_INSERTED) |
| 128 | host->queued_events &= ~GB_SDIO_CARD_REMOVED; |
| 129 | else if (event & GB_SDIO_CARD_REMOVED) |
| 130 | host->queued_events &= ~GB_SDIO_CARD_INSERTED; |
| 131 | |
| 132 | host->queued_events |= event; |
| 133 | } |
| 134 | |
| 135 | static int _gb_sdio_process_events(struct gb_sdio_host *host, u8 event) |
| 136 | { |
| 137 | u8 state_changed = 0; |
| 138 | |
| 139 | if (event & GB_SDIO_CARD_INSERTED) { |
| 140 | if (!mmc_card_is_removable(host->mmc)) |
| 141 | return 0; |
| 142 | if (host->card_present) |
| 143 | return 0; |
| 144 | host->card_present = true; |
| 145 | state_changed = 1; |
| 146 | } |
| 147 | |
| 148 | if (event & GB_SDIO_CARD_REMOVED) { |
| 149 | if (!mmc_card_is_removable(host->mmc)) |
| 150 | return 0; |
| 151 | if (!(host->card_present)) |
| 152 | return 0; |
| 153 | host->card_present = false; |
| 154 | state_changed = 1; |
| 155 | } |
| 156 | |
| 157 | if (event & GB_SDIO_WP) { |
| 158 | host->read_only = true; |
| 159 | } |
| 160 | |
| 161 | if (state_changed) { |
| 162 | dev_info(mmc_dev(host->mmc), "card %s now event\n", |
| 163 | (host->card_present ? "inserted" : "removed")); |
| 164 | mmc_detect_change(host->mmc, 0); |
| 165 | } |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 170 | static int gb_sdio_event_recv(u8 type, struct gb_operation *op) |
| 171 | { |
| 172 | struct gb_connection *connection = op->connection; |
| 173 | struct gb_sdio_host *host = connection->private; |
| 174 | struct gb_message *request; |
| 175 | struct gb_sdio_event_request *payload; |
Rui Miguel Silva | c36d31c | 2015-07-02 19:11:31 +0100 | [diff] [blame] | 176 | int ret = 0; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 177 | u8 event; |
| 178 | |
| 179 | if (type != GB_SDIO_TYPE_EVENT) { |
| 180 | dev_err(&connection->dev, |
| 181 | "unsupported unsolicited event: %u\n", type); |
| 182 | return -EINVAL; |
| 183 | } |
| 184 | |
| 185 | request = op->request; |
| 186 | |
| 187 | if (request->payload_size != sizeof(*payload)) { |
| 188 | dev_err(mmc_dev(host->mmc), "wrong event size received\n"); |
| 189 | return -EINVAL; |
| 190 | } |
| 191 | |
| 192 | payload = request->payload; |
| 193 | event = payload->event; |
| 194 | |
Rui Miguel Silva | c36d31c | 2015-07-02 19:11:31 +0100 | [diff] [blame] | 195 | if (host->removed) |
| 196 | _gb_queue_event(host, event); |
| 197 | else |
| 198 | ret = _gb_sdio_process_events(host, event); |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 199 | |
Rui Miguel Silva | c36d31c | 2015-07-02 19:11:31 +0100 | [diff] [blame] | 200 | return ret; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | static int gb_sdio_set_ios(struct gb_sdio_host *host, |
| 204 | struct gb_sdio_set_ios_request *request) |
| 205 | { |
| 206 | return gb_operation_sync(host->connection, GB_SDIO_TYPE_SET_IOS, |
| 207 | request, sizeof(*request), NULL, 0); |
| 208 | } |
| 209 | |
| 210 | static int _gb_sdio_send(struct gb_sdio_host *host, struct mmc_data *data, |
| 211 | size_t len, u16 nblocks, off_t skip) |
| 212 | { |
| 213 | struct gb_sdio_transfer_request *request; |
| 214 | struct gb_sdio_transfer_response response; |
| 215 | struct scatterlist *sg = data->sg; |
| 216 | unsigned int sg_len = data->sg_len; |
| 217 | size_t copied; |
| 218 | u16 send_blksz; |
| 219 | u16 send_blocks; |
| 220 | int ret; |
| 221 | |
| 222 | WARN_ON(len > host->data_max); |
| 223 | |
| 224 | request = host->xfer_buffer; |
| 225 | request->data_flags = (data->flags >> 8); |
| 226 | request->data_blocks = cpu_to_le16(nblocks); |
| 227 | request->data_blksz = cpu_to_le16(data->blksz); |
| 228 | |
| 229 | copied = sg_pcopy_to_buffer(sg, sg_len, &request->data[0] + skip, len, |
| 230 | skip); |
| 231 | |
| 232 | if (copied != len) |
| 233 | return -EINVAL; |
| 234 | |
| 235 | ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_TRANSFER, |
| 236 | request, len, &response, sizeof(response)); |
| 237 | if (ret < 0) |
| 238 | return ret; |
| 239 | |
| 240 | send_blocks = le16_to_cpu(response.data_blocks); |
| 241 | send_blksz = le16_to_cpu(response.data_blksz); |
| 242 | |
| 243 | if (len != send_blksz * send_blocks) |
| 244 | return -EINVAL; |
| 245 | |
| 246 | return ret; |
| 247 | } |
| 248 | |
| 249 | static int _gb_sdio_recv(struct gb_sdio_host *host, struct mmc_data *data, |
| 250 | size_t len, u16 nblocks, off_t skip) |
| 251 | { |
| 252 | struct gb_sdio_transfer_request request; |
| 253 | struct gb_sdio_transfer_response *response; |
| 254 | struct scatterlist *sg = data->sg; |
| 255 | unsigned int sg_len = data->sg_len; |
| 256 | size_t copied; |
| 257 | u16 recv_blksz; |
| 258 | u16 recv_blocks; |
| 259 | int ret; |
| 260 | |
| 261 | WARN_ON(len > host->data_max); |
| 262 | |
| 263 | request.data_flags = (data->flags >> 8); |
| 264 | request.data_blocks = cpu_to_le16(nblocks); |
| 265 | request.data_blksz = cpu_to_le16(data->blksz); |
| 266 | |
| 267 | response = host->xfer_buffer; |
| 268 | |
| 269 | ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_TRANSFER, |
| 270 | &request, sizeof(request), response, len); |
| 271 | if (ret < 0) |
| 272 | return ret; |
| 273 | |
| 274 | recv_blocks = le16_to_cpu(response->data_blocks); |
| 275 | recv_blksz = le16_to_cpu(response->data_blksz); |
| 276 | |
| 277 | if (len != recv_blksz * recv_blocks) |
| 278 | return -EINVAL; |
| 279 | |
| 280 | copied = sg_pcopy_from_buffer(sg, sg_len, &response->data[0] + skip, |
| 281 | len, skip); |
| 282 | if (copied != len) |
| 283 | return -EINVAL; |
| 284 | |
| 285 | return 0; |
| 286 | } |
| 287 | |
Rui Miguel Silva | 882edf5 | 2015-07-02 19:11:34 +0100 | [diff] [blame^] | 288 | static int gb_sdio_transfer(struct gb_sdio_host *host, struct mmc_data *data) |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 289 | { |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 290 | size_t left, len; |
| 291 | off_t skip = 0; |
| 292 | int ret = 0; |
| 293 | u16 nblocks; |
| 294 | |
| 295 | left = data->blksz * data->blocks; |
| 296 | |
| 297 | while (left) { |
| 298 | /* check is a stop transmission is pending */ |
| 299 | spin_lock(&host->xfer); |
| 300 | if (host->xfer_stop) { |
| 301 | host->xfer_stop = false; |
| 302 | spin_unlock(&host->xfer); |
| 303 | ret = -EINTR; |
| 304 | goto out; |
| 305 | } |
| 306 | spin_unlock(&host->xfer); |
| 307 | len = min(left, host->data_max); |
| 308 | nblocks = do_div(len, data->blksz); |
| 309 | len = nblocks * data->blksz; |
| 310 | |
| 311 | if (data->flags & MMC_DATA_READ) { |
| 312 | ret = _gb_sdio_recv(host, data, len, nblocks, skip); |
| 313 | if (ret < 0) |
| 314 | goto out; |
| 315 | } else { |
| 316 | ret = _gb_sdio_send(host, data, len, nblocks, skip); |
| 317 | if (ret < 0) |
| 318 | goto out; |
| 319 | } |
| 320 | data->bytes_xfered += len; |
| 321 | left -= len; |
| 322 | skip += len; |
| 323 | } |
| 324 | |
| 325 | out: |
| 326 | data->error = ret; |
| 327 | return ret; |
| 328 | } |
| 329 | |
| 330 | static int gb_sdio_command(struct gb_sdio_host *host, struct mmc_command *cmd) |
| 331 | { |
| 332 | struct gb_sdio_command_request request; |
| 333 | struct gb_sdio_command_response response; |
| 334 | u8 cmd_flags; |
| 335 | u8 cmd_type; |
| 336 | int i; |
| 337 | int ret = 0; |
| 338 | |
| 339 | switch (mmc_resp_type(cmd)) { |
| 340 | case MMC_RSP_NONE: |
| 341 | cmd_flags = GB_SDIO_RSP_NONE; |
| 342 | break; |
| 343 | case MMC_RSP_R1: |
| 344 | cmd_flags = GB_SDIO_RSP_R1_R5_R6_R7; |
| 345 | break; |
| 346 | case MMC_RSP_R1B: |
| 347 | cmd_flags = GB_SDIO_RSP_R1B; |
| 348 | break; |
| 349 | case MMC_RSP_R2: |
| 350 | cmd_flags = GB_SDIO_RSP_R2; |
| 351 | break; |
| 352 | case MMC_RSP_R3: |
| 353 | cmd_flags = GB_SDIO_RSP_R3_R4; |
| 354 | default: |
| 355 | dev_err(mmc_dev(host->mmc), "cmd flag invalid %04x\n", |
| 356 | mmc_resp_type(cmd)); |
| 357 | ret = -EINVAL; |
| 358 | goto out; |
| 359 | } |
| 360 | |
| 361 | switch (mmc_cmd_type(cmd)) { |
| 362 | case MMC_CMD_BC: |
| 363 | cmd_type = GB_SDIO_CMD_BC; |
| 364 | break; |
| 365 | case MMC_CMD_BCR: |
| 366 | cmd_type = GB_SDIO_CMD_BCR; |
| 367 | break; |
| 368 | case MMC_CMD_AC: |
| 369 | cmd_type = GB_SDIO_CMD_AC; |
| 370 | break; |
| 371 | case MMC_CMD_ADTC: |
| 372 | cmd_type = GB_SDIO_CMD_ADTC; |
| 373 | break; |
| 374 | default: |
| 375 | dev_err(mmc_dev(host->mmc), "cmd type invalid %04x\n", |
| 376 | mmc_cmd_type(cmd)); |
| 377 | ret = -EINVAL; |
| 378 | goto out; |
| 379 | } |
| 380 | |
| 381 | request.cmd = cmd->opcode; |
| 382 | request.cmd_flags = cmd_flags; |
| 383 | request.cmd_type = cmd_type; |
| 384 | request.cmd_arg = cpu_to_le32(cmd->arg); |
| 385 | |
| 386 | ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_COMMAND, |
| 387 | &request, sizeof(request), &response, |
| 388 | sizeof(response)); |
| 389 | if (ret < 0) |
| 390 | goto out; |
| 391 | |
| 392 | /* no response expected */ |
| 393 | if (cmd_flags & GB_SDIO_RSP_NONE) |
| 394 | goto out; |
| 395 | |
| 396 | /* long response expected */ |
| 397 | if (cmd_flags & GB_SDIO_RSP_R2) |
| 398 | for (i = 0; i < 4; i++) |
| 399 | cmd->resp[i] = le32_to_cpu(response.resp[i]); |
| 400 | else |
| 401 | cmd->resp[0] = le32_to_cpu(response.resp[0]); |
| 402 | |
| 403 | out: |
| 404 | cmd->error = ret; |
| 405 | return ret; |
| 406 | } |
| 407 | |
| 408 | static void gb_sdio_mrq_work(struct work_struct *work) |
| 409 | { |
| 410 | struct gb_sdio_host *host; |
| 411 | struct mmc_request *mrq; |
| 412 | int ret; |
| 413 | |
| 414 | host = container_of(work, struct gb_sdio_host, mrqwork); |
| 415 | |
| 416 | mutex_lock(&host->lock); |
Phong Tran | 93a99e8 | 2015-06-26 21:05:13 +0700 | [diff] [blame] | 417 | mrq = host->mrq; |
| 418 | if (!mrq) { |
| 419 | mutex_unlock(&host->lock); |
| 420 | dev_err(mmc_dev(host->mmc), "mmc request is NULL"); |
| 421 | return; |
| 422 | } |
| 423 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 424 | if (host->removed) { |
| 425 | mrq->cmd->error = -ESHUTDOWN; |
| 426 | goto done; |
| 427 | } |
| 428 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 429 | if (mrq->sbc) { |
| 430 | ret = gb_sdio_command(host, mrq->sbc); |
| 431 | if (ret < 0) |
| 432 | goto done; |
| 433 | } |
| 434 | |
| 435 | ret = gb_sdio_command(host, mrq->cmd); |
| 436 | if (ret < 0) |
| 437 | goto done; |
| 438 | |
| 439 | if (mrq->data) { |
Rui Miguel Silva | 882edf5 | 2015-07-02 19:11:34 +0100 | [diff] [blame^] | 440 | ret = gb_sdio_transfer(host, host->mrq->data); |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 441 | if (ret < 0) |
| 442 | goto done; |
| 443 | } |
| 444 | |
Rui Miguel Silva | 7a5cd5a | 2015-07-02 19:11:33 +0100 | [diff] [blame] | 445 | if (mrq->stop) { |
| 446 | ret = gb_sdio_command(host, mrq->stop); |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 447 | if (ret < 0) |
| 448 | goto done; |
| 449 | } |
| 450 | |
| 451 | done: |
Phong Tran | 93a99e8 | 2015-06-26 21:05:13 +0700 | [diff] [blame] | 452 | host->mrq = NULL; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 453 | mutex_unlock(&host->lock); |
| 454 | mmc_request_done(host->mmc, mrq); |
| 455 | } |
| 456 | |
| 457 | static void gb_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| 458 | { |
| 459 | struct gb_sdio_host *host = mmc_priv(mmc); |
| 460 | struct mmc_command *cmd = mrq->cmd; |
| 461 | |
| 462 | /* Check if it is a cancel to ongoing transfer */ |
| 463 | if (cmd->opcode == MMC_STOP_TRANSMISSION) { |
| 464 | spin_lock(&host->xfer); |
| 465 | host->xfer_stop = true; |
| 466 | spin_unlock(&host->xfer); |
| 467 | } |
| 468 | |
| 469 | mutex_lock(&host->lock); |
| 470 | |
| 471 | WARN_ON(host->mrq); |
| 472 | host->mrq = mrq; |
| 473 | |
| 474 | if (host->removed) { |
| 475 | mrq->cmd->error = -ESHUTDOWN; |
| 476 | goto out; |
| 477 | } |
| 478 | if (!host->card_present) { |
| 479 | mrq->cmd->error = -ENOMEDIUM; |
| 480 | goto out; |
| 481 | } |
| 482 | |
| 483 | queue_work(gb_sdio_mrq_workqueue, &host->mrqwork); |
| 484 | |
| 485 | mutex_unlock(&host->lock); |
| 486 | return; |
| 487 | |
| 488 | out: |
| 489 | host->mrq = NULL; |
| 490 | mutex_unlock(&host->lock); |
| 491 | mmc_request_done(mmc, mrq); |
| 492 | } |
| 493 | |
| 494 | static void gb_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
| 495 | { |
| 496 | struct gb_sdio_host *host = mmc_priv(mmc); |
| 497 | struct gb_sdio_set_ios_request request; |
| 498 | int ret; |
| 499 | u8 power_mode; |
| 500 | u8 bus_width; |
| 501 | u8 timing; |
| 502 | u8 signal_voltage; |
| 503 | u8 drv_type; |
| 504 | |
| 505 | mutex_lock(&host->lock); |
| 506 | request.clock = cpu_to_le32(ios->clock); |
| 507 | request.vdd = cpu_to_le32(1 << ios->vdd); |
| 508 | |
| 509 | request.bus_mode = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN ? |
| 510 | GB_SDIO_BUSMODE_OPENDRAIN : |
| 511 | GB_SDIO_BUSMODE_PUSHPULL); |
| 512 | |
| 513 | switch (ios->power_mode) { |
| 514 | case MMC_POWER_OFF: |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 515 | default: |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 516 | power_mode = GB_SDIO_POWER_OFF; |
| 517 | break; |
| 518 | case MMC_POWER_UP: |
| 519 | power_mode = GB_SDIO_POWER_UP; |
| 520 | break; |
| 521 | case MMC_POWER_ON: |
| 522 | power_mode = GB_SDIO_POWER_ON; |
| 523 | break; |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 524 | #ifdef MMC_POWER_UNDEFINED_SUPPORTED |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 525 | case MMC_POWER_UNDEFINED: |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 526 | power_mode = GB_SDIO_POWER_UNDEFINED; |
| 527 | break; |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 528 | #endif |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 529 | } |
| 530 | request.power_mode = power_mode; |
| 531 | |
| 532 | switch (ios->bus_width) { |
| 533 | case MMC_BUS_WIDTH_1: |
| 534 | bus_width = GB_SDIO_BUS_WIDTH_1; |
| 535 | break; |
| 536 | case MMC_BUS_WIDTH_4: |
| 537 | default: |
| 538 | bus_width = GB_SDIO_BUS_WIDTH_4; |
| 539 | break; |
| 540 | case MMC_BUS_WIDTH_8: |
| 541 | bus_width = GB_SDIO_BUS_WIDTH_8; |
| 542 | break; |
| 543 | } |
| 544 | request.bus_width = bus_width; |
| 545 | |
| 546 | switch (ios->timing) { |
| 547 | case MMC_TIMING_LEGACY: |
| 548 | default: |
| 549 | timing = GB_SDIO_TIMING_LEGACY; |
| 550 | break; |
| 551 | case MMC_TIMING_MMC_HS: |
| 552 | timing = GB_SDIO_TIMING_MMC_HS; |
| 553 | break; |
| 554 | case MMC_TIMING_SD_HS: |
| 555 | timing = GB_SDIO_TIMING_SD_HS; |
| 556 | break; |
| 557 | case MMC_TIMING_UHS_SDR12: |
| 558 | timing = GB_SDIO_TIMING_UHS_SDR12; |
| 559 | break; |
| 560 | case MMC_TIMING_UHS_SDR25: |
| 561 | timing = GB_SDIO_TIMING_UHS_SDR25; |
| 562 | break; |
| 563 | case MMC_TIMING_UHS_SDR50: |
| 564 | timing = GB_SDIO_TIMING_UHS_SDR50; |
| 565 | break; |
| 566 | case MMC_TIMING_UHS_SDR104: |
| 567 | timing = GB_SDIO_TIMING_UHS_SDR104; |
| 568 | break; |
| 569 | case MMC_TIMING_UHS_DDR50: |
| 570 | timing = GB_SDIO_TIMING_UHS_DDR50; |
| 571 | break; |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 572 | #ifdef MMC_DDR52_DEFINED |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 573 | case MMC_TIMING_MMC_DDR52: |
| 574 | timing = GB_SDIO_TIMING_MMC_DDR52; |
| 575 | break; |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 576 | #endif |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 577 | case MMC_TIMING_MMC_HS200: |
| 578 | timing = GB_SDIO_TIMING_MMC_HS200; |
| 579 | break; |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 580 | #ifdef MMC_HS400_SUPPORTED |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 581 | case MMC_TIMING_MMC_HS400: |
| 582 | timing = GB_SDIO_TIMING_MMC_HS400; |
| 583 | break; |
Rui Miguel Silva | 5656ab9 | 2015-06-24 23:20:26 +0100 | [diff] [blame] | 584 | #endif |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 585 | } |
| 586 | request.timing = timing; |
| 587 | |
| 588 | switch (ios->signal_voltage) { |
| 589 | case MMC_SIGNAL_VOLTAGE_330: |
| 590 | signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_330; |
| 591 | break; |
| 592 | case MMC_SIGNAL_VOLTAGE_180: |
| 593 | default: |
| 594 | signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_180; |
| 595 | break; |
| 596 | case MMC_SIGNAL_VOLTAGE_120: |
| 597 | signal_voltage = GB_SDIO_SIGNAL_VOLTAGE_120; |
| 598 | break; |
| 599 | } |
| 600 | request.signal_voltage = signal_voltage; |
| 601 | |
| 602 | switch (ios->drv_type) { |
| 603 | case MMC_SET_DRIVER_TYPE_A: |
| 604 | drv_type = GB_SDIO_SET_DRIVER_TYPE_A; |
| 605 | break; |
| 606 | case MMC_SET_DRIVER_TYPE_C: |
| 607 | drv_type = GB_SDIO_SET_DRIVER_TYPE_C; |
| 608 | break; |
| 609 | case MMC_SET_DRIVER_TYPE_D: |
| 610 | drv_type = GB_SDIO_SET_DRIVER_TYPE_D; |
| 611 | break; |
| 612 | case MMC_SET_DRIVER_TYPE_B: |
| 613 | default: |
| 614 | drv_type = GB_SDIO_SET_DRIVER_TYPE_B; |
| 615 | break; |
| 616 | } |
| 617 | request.drv_type = drv_type; |
| 618 | |
| 619 | ret = gb_sdio_set_ios(host, &request); |
| 620 | if (ret < 0) |
| 621 | goto out; |
| 622 | |
| 623 | memcpy(&mmc->ios, ios, sizeof(mmc->ios)); |
| 624 | |
| 625 | out: |
| 626 | mutex_unlock(&host->lock); |
| 627 | } |
| 628 | |
| 629 | static int gb_mmc_get_ro(struct mmc_host *mmc) |
| 630 | { |
| 631 | struct gb_sdio_host *host = mmc_priv(mmc); |
| 632 | |
| 633 | mutex_lock(&host->lock); |
| 634 | if (host->removed) |
| 635 | return -ESHUTDOWN; |
| 636 | mutex_unlock(&host->lock); |
Rui Miguel Silva | 08ccc9b | 2015-07-02 19:11:32 +0100 | [diff] [blame] | 637 | return host->read_only; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | static int gb_mmc_get_cd(struct mmc_host *mmc) |
| 641 | { |
| 642 | struct gb_sdio_host *host = mmc_priv(mmc); |
| 643 | |
| 644 | mutex_lock(&host->lock); |
| 645 | if (host->removed) |
| 646 | return -ESHUTDOWN; |
| 647 | mutex_unlock(&host->lock); |
Rui Miguel Silva | 08ccc9b | 2015-07-02 19:11:32 +0100 | [diff] [blame] | 648 | return host->card_present; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 649 | } |
| 650 | |
| 651 | static const struct mmc_host_ops gb_sdio_ops = { |
| 652 | .request = gb_mmc_request, |
| 653 | .set_ios = gb_mmc_set_ios, |
| 654 | .get_ro = gb_mmc_get_ro, |
| 655 | .get_cd = gb_mmc_get_cd, |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 656 | }; |
| 657 | |
Greg Kroah-Hartman | a2f4763 | 2014-10-28 10:17:09 +0800 | [diff] [blame] | 658 | static int gb_sdio_connection_init(struct gb_connection *connection) |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 659 | { |
| 660 | struct mmc_host *mmc; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 661 | struct gb_sdio_host *host; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 662 | size_t max_buffer; |
| 663 | int ret = 0; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 664 | |
Viresh Kumar | 64e6929 | 2014-11-19 17:24:58 +0530 | [diff] [blame] | 665 | mmc = mmc_alloc_host(sizeof(*host), &connection->dev); |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 666 | if (!mmc) |
| 667 | return -ENOMEM; |
| 668 | |
| 669 | host = mmc_priv(mmc); |
| 670 | host->mmc = mmc; |
Rui Miguel Silva | c36d31c | 2015-07-02 19:11:31 +0100 | [diff] [blame] | 671 | host->removed = true; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 672 | |
Greg Kroah-Hartman | a2f4763 | 2014-10-28 10:17:09 +0800 | [diff] [blame] | 673 | host->connection = connection; |
| 674 | connection->private = host; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 675 | |
| 676 | ret = get_version(host); |
| 677 | if (ret < 0) |
| 678 | goto free_mmc; |
| 679 | |
| 680 | ret = gb_sdio_get_caps(host); |
| 681 | if (ret < 0) |
| 682 | goto free_mmc; |
| 683 | |
| 684 | mmc->ops = &gb_sdio_ops; |
| 685 | |
| 686 | /* for now we just make a map 1:1 between max blocks and segments */ |
| 687 | mmc->max_segs = host->mmc->max_blk_count; |
| 688 | mmc->max_seg_size = host->mmc->max_blk_size; |
| 689 | |
| 690 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; |
| 691 | |
| 692 | max_buffer = gb_operation_get_payload_size_max(host->connection); |
| 693 | host->xfer_buffer = kzalloc(max_buffer, GFP_KERNEL); |
| 694 | if (!host->xfer_buffer) { |
| 695 | ret = -ENOMEM; |
| 696 | goto free_mmc; |
| 697 | } |
| 698 | mutex_init(&host->lock); |
| 699 | spin_lock_init(&host->xfer); |
| 700 | gb_sdio_mrq_workqueue = alloc_workqueue("gb_sdio_mrq", 0, 1); |
| 701 | INIT_WORK(&host->mrqwork, gb_sdio_mrq_work); |
| 702 | |
| 703 | ret = mmc_add_host(mmc); |
| 704 | if (ret < 0) |
| 705 | goto free_work; |
Rui Miguel Silva | c36d31c | 2015-07-02 19:11:31 +0100 | [diff] [blame] | 706 | host->removed = false; |
| 707 | ret = _gb_sdio_process_events(host, host->queued_events); |
| 708 | host->queued_events = 0; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 709 | |
| 710 | return ret; |
| 711 | |
| 712 | free_work: |
| 713 | destroy_workqueue(gb_sdio_mrq_workqueue); |
| 714 | kfree(host->xfer_buffer); |
| 715 | |
| 716 | free_mmc: |
| 717 | connection->private = NULL; |
| 718 | mmc_free_host(mmc); |
| 719 | |
| 720 | return ret; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 721 | } |
| 722 | |
Greg Kroah-Hartman | a2f4763 | 2014-10-28 10:17:09 +0800 | [diff] [blame] | 723 | static void gb_sdio_connection_exit(struct gb_connection *connection) |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 724 | { |
| 725 | struct mmc_host *mmc; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 726 | struct gb_sdio_host *host = connection->private; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 727 | |
Alex Elder | 051fb04 | 2014-10-16 06:35:24 -0500 | [diff] [blame] | 728 | if (!host) |
| 729 | return; |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 730 | |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 731 | mutex_lock(&host->lock); |
| 732 | host->removed = true; |
Alex Elder | 051fb04 | 2014-10-16 06:35:24 -0500 | [diff] [blame] | 733 | mmc = host->mmc; |
Greg Kroah-Hartman | a2f4763 | 2014-10-28 10:17:09 +0800 | [diff] [blame] | 734 | connection->private = NULL; |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 735 | mutex_unlock(&host->lock); |
| 736 | |
| 737 | flush_workqueue(gb_sdio_mrq_workqueue); |
| 738 | destroy_workqueue(gb_sdio_mrq_workqueue); |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 739 | mmc_remove_host(mmc); |
Phong Tran | 9b86bdf | 2015-06-26 21:05:12 +0700 | [diff] [blame] | 740 | mmc_free_host(mmc); |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 741 | kfree(host->xfer_buffer); |
Greg Kroah-Hartman | 83ddaaa | 2014-08-11 17:27:22 +0800 | [diff] [blame] | 742 | } |
| 743 | |
Alex Elder | 19d03de | 2014-11-05 16:12:53 -0600 | [diff] [blame] | 744 | static struct gb_protocol sdio_protocol = { |
Greg Kroah-Hartman | 7422a1e | 2014-12-24 13:01:45 -0800 | [diff] [blame] | 745 | .name = "sdio", |
Alex Elder | 19d03de | 2014-11-05 16:12:53 -0600 | [diff] [blame] | 746 | .id = GREYBUS_PROTOCOL_SDIO, |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 747 | .major = GB_SDIO_VERSION_MAJOR, |
| 748 | .minor = GB_SDIO_VERSION_MINOR, |
Alex Elder | 5d9fd7e | 2014-11-05 16:12:54 -0600 | [diff] [blame] | 749 | .connection_init = gb_sdio_connection_init, |
| 750 | .connection_exit = gb_sdio_connection_exit, |
Rui Miguel Silva | 3b6ecd6 | 2015-06-22 14:03:52 +0100 | [diff] [blame] | 751 | .request_recv = gb_sdio_event_recv, |
Alex Elder | 19d03de | 2014-11-05 16:12:53 -0600 | [diff] [blame] | 752 | }; |
| 753 | |
Viresh Kumar | e18822e | 2015-07-01 12:13:52 +0530 | [diff] [blame] | 754 | gb_builtin_protocol_driver(sdio_protocol); |