Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 1 | /* |
| 2 | * This is a driver for the SDHC controller found in Freescale MX2/MX3 |
| 3 | * SoCs. It is basically the same hardware as found on MX1 (imxmmc.c). |
| 4 | * Unlike the hardware found on MX1, this hardware just works and does |
| 5 | * not need all the quirks found in imxmmc.c, hence the seperate driver. |
| 6 | * |
| 7 | * Copyright (C) 2009 Ilya Yanok, <yanok@emcraft.com> |
| 8 | * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> |
| 9 | * Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com> |
| 10 | * |
| 11 | * derived from pxamci.c by Russell King |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of the GNU General Public License version 2 as |
| 15 | * published by the Free Software Foundation. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | #include <config.h> |
| 20 | #include <common.h> |
| 21 | #include <command.h> |
| 22 | #include <mmc.h> |
| 23 | #include <part.h> |
| 24 | #include <malloc.h> |
| 25 | #include <mmc.h> |
| 26 | #include <asm/errno.h> |
| 27 | #include <asm/io.h> |
| 28 | #ifdef CONFIG_MX27 |
| 29 | #include <asm/arch/clock.h> |
| 30 | #endif |
| 31 | |
| 32 | #define DRIVER_NAME "mxc-mmc" |
| 33 | |
| 34 | struct mxcmci_regs { |
| 35 | u32 str_stp_clk; |
| 36 | u32 status; |
| 37 | u32 clk_rate; |
| 38 | u32 cmd_dat_cont; |
| 39 | u32 res_to; |
| 40 | u32 read_to; |
| 41 | u32 blk_len; |
| 42 | u32 nob; |
| 43 | u32 rev_no; |
| 44 | u32 int_cntr; |
| 45 | u32 cmd; |
| 46 | u32 arg; |
| 47 | u32 pad; |
| 48 | u32 res_fifo; |
| 49 | u32 buffer_access; |
| 50 | }; |
| 51 | |
| 52 | #define STR_STP_CLK_RESET (1 << 3) |
| 53 | #define STR_STP_CLK_START_CLK (1 << 1) |
| 54 | #define STR_STP_CLK_STOP_CLK (1 << 0) |
| 55 | |
| 56 | #define STATUS_CARD_INSERTION (1 << 31) |
| 57 | #define STATUS_CARD_REMOVAL (1 << 30) |
| 58 | #define STATUS_YBUF_EMPTY (1 << 29) |
| 59 | #define STATUS_XBUF_EMPTY (1 << 28) |
| 60 | #define STATUS_YBUF_FULL (1 << 27) |
| 61 | #define STATUS_XBUF_FULL (1 << 26) |
| 62 | #define STATUS_BUF_UND_RUN (1 << 25) |
| 63 | #define STATUS_BUF_OVFL (1 << 24) |
| 64 | #define STATUS_SDIO_INT_ACTIVE (1 << 14) |
| 65 | #define STATUS_END_CMD_RESP (1 << 13) |
| 66 | #define STATUS_WRITE_OP_DONE (1 << 12) |
| 67 | #define STATUS_DATA_TRANS_DONE (1 << 11) |
| 68 | #define STATUS_READ_OP_DONE (1 << 11) |
| 69 | #define STATUS_WR_CRC_ERROR_CODE_MASK (3 << 10) |
| 70 | #define STATUS_CARD_BUS_CLK_RUN (1 << 8) |
| 71 | #define STATUS_BUF_READ_RDY (1 << 7) |
| 72 | #define STATUS_BUF_WRITE_RDY (1 << 6) |
| 73 | #define STATUS_RESP_CRC_ERR (1 << 5) |
| 74 | #define STATUS_CRC_READ_ERR (1 << 3) |
| 75 | #define STATUS_CRC_WRITE_ERR (1 << 2) |
| 76 | #define STATUS_TIME_OUT_RESP (1 << 1) |
| 77 | #define STATUS_TIME_OUT_READ (1 << 0) |
| 78 | #define STATUS_ERR_MASK 0x2f |
| 79 | |
| 80 | #define CMD_DAT_CONT_CMD_RESP_LONG_OFF (1 << 12) |
| 81 | #define CMD_DAT_CONT_STOP_READWAIT (1 << 11) |
| 82 | #define CMD_DAT_CONT_START_READWAIT (1 << 10) |
| 83 | #define CMD_DAT_CONT_BUS_WIDTH_4 (2 << 8) |
| 84 | #define CMD_DAT_CONT_INIT (1 << 7) |
| 85 | #define CMD_DAT_CONT_WRITE (1 << 4) |
| 86 | #define CMD_DAT_CONT_DATA_ENABLE (1 << 3) |
| 87 | #define CMD_DAT_CONT_RESPONSE_48BIT_CRC (1 << 0) |
| 88 | #define CMD_DAT_CONT_RESPONSE_136BIT (2 << 0) |
| 89 | #define CMD_DAT_CONT_RESPONSE_48BIT (3 << 0) |
| 90 | |
| 91 | #define INT_SDIO_INT_WKP_EN (1 << 18) |
| 92 | #define INT_CARD_INSERTION_WKP_EN (1 << 17) |
| 93 | #define INT_CARD_REMOVAL_WKP_EN (1 << 16) |
| 94 | #define INT_CARD_INSERTION_EN (1 << 15) |
| 95 | #define INT_CARD_REMOVAL_EN (1 << 14) |
| 96 | #define INT_SDIO_IRQ_EN (1 << 13) |
| 97 | #define INT_DAT0_EN (1 << 12) |
| 98 | #define INT_BUF_READ_EN (1 << 4) |
| 99 | #define INT_BUF_WRITE_EN (1 << 3) |
| 100 | #define INT_END_CMD_RES_EN (1 << 2) |
| 101 | #define INT_WRITE_OP_DONE_EN (1 << 1) |
| 102 | #define INT_READ_OP_EN (1 << 0) |
| 103 | |
| 104 | struct mxcmci_host { |
| 105 | struct mmc *mmc; |
| 106 | struct mxcmci_regs *base; |
| 107 | int irq; |
| 108 | int detect_irq; |
| 109 | int dma; |
| 110 | int do_dma; |
| 111 | unsigned int power_mode; |
| 112 | |
| 113 | struct mmc_cmd *cmd; |
| 114 | struct mmc_data *data; |
| 115 | |
| 116 | unsigned int dma_nents; |
| 117 | unsigned int datasize; |
| 118 | unsigned int dma_dir; |
| 119 | |
| 120 | u16 rev_no; |
| 121 | unsigned int cmdat; |
| 122 | |
| 123 | int clock; |
| 124 | }; |
| 125 | |
| 126 | static struct mxcmci_host mxcmci_host; |
| 127 | static struct mxcmci_host *host = &mxcmci_host; |
| 128 | |
| 129 | static inline int mxcmci_use_dma(struct mxcmci_host *host) |
| 130 | { |
| 131 | return host->do_dma; |
| 132 | } |
| 133 | |
| 134 | static void mxcmci_softreset(struct mxcmci_host *host) |
| 135 | { |
| 136 | int i; |
| 137 | |
| 138 | /* reset sequence */ |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 139 | writel(STR_STP_CLK_RESET, &host->base->str_stp_clk); |
| 140 | writel(STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 141 | &host->base->str_stp_clk); |
| 142 | |
| 143 | for (i = 0; i < 8; i++) |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 144 | writel(STR_STP_CLK_START_CLK, &host->base->str_stp_clk); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 145 | |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 146 | writel(0xff, &host->base->res_to); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | static void mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) |
| 150 | { |
| 151 | unsigned int nob = data->blocks; |
| 152 | unsigned int blksz = data->blocksize; |
| 153 | unsigned int datasize = nob * blksz; |
| 154 | |
| 155 | host->data = data; |
| 156 | |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 157 | writel(nob, &host->base->nob); |
| 158 | writel(blksz, &host->base->blk_len); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 159 | host->datasize = datasize; |
| 160 | } |
| 161 | |
| 162 | static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_cmd *cmd, |
| 163 | unsigned int cmdat) |
| 164 | { |
| 165 | if (host->cmd != NULL) |
| 166 | printf("mxcmci: error!\n"); |
| 167 | host->cmd = cmd; |
| 168 | |
| 169 | switch (cmd->resp_type) { |
| 170 | case MMC_RSP_R1: /* short CRC, OPCODE */ |
| 171 | case MMC_RSP_R1b:/* short CRC, OPCODE, BUSY */ |
| 172 | cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; |
| 173 | break; |
| 174 | case MMC_RSP_R2: /* long 136 bit + CRC */ |
| 175 | cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; |
| 176 | break; |
| 177 | case MMC_RSP_R3: /* short */ |
| 178 | cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; |
| 179 | break; |
| 180 | case MMC_RSP_NONE: |
| 181 | break; |
| 182 | default: |
| 183 | printf("mxcmci: unhandled response type 0x%x\n", |
| 184 | cmd->resp_type); |
| 185 | return -EINVAL; |
| 186 | } |
| 187 | |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 188 | writel(cmd->cmdidx, &host->base->cmd); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 189 | writel(cmd->cmdarg, &host->base->arg); |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 190 | writel(cmdat, &host->base->cmd_dat_cont); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | static void mxcmci_finish_request(struct mxcmci_host *host, |
| 196 | struct mmc_cmd *cmd, struct mmc_data *data) |
| 197 | { |
| 198 | host->cmd = NULL; |
| 199 | host->data = NULL; |
| 200 | } |
| 201 | |
| 202 | static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) |
| 203 | { |
| 204 | int data_error = 0; |
| 205 | |
| 206 | if (stat & STATUS_ERR_MASK) { |
| 207 | printf("request failed. status: 0x%08x\n", |
| 208 | stat); |
| 209 | if (stat & STATUS_CRC_READ_ERR) { |
| 210 | data_error = -EILSEQ; |
| 211 | } else if (stat & STATUS_CRC_WRITE_ERR) { |
| 212 | u32 err_code = (stat >> 9) & 0x3; |
| 213 | if (err_code == 2) /* No CRC response */ |
| 214 | data_error = TIMEOUT; |
| 215 | else |
| 216 | data_error = -EILSEQ; |
| 217 | } else if (stat & STATUS_TIME_OUT_READ) { |
| 218 | data_error = TIMEOUT; |
| 219 | } else { |
| 220 | data_error = -EIO; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | host->data = NULL; |
| 225 | |
| 226 | return data_error; |
| 227 | } |
| 228 | |
| 229 | static int mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) |
| 230 | { |
| 231 | struct mmc_cmd *cmd = host->cmd; |
| 232 | int i; |
| 233 | u32 a, b, c; |
| 234 | u32 *resp = (u32 *)cmd->response; |
| 235 | |
| 236 | if (!cmd) |
| 237 | return 0; |
| 238 | |
| 239 | if (stat & STATUS_TIME_OUT_RESP) { |
| 240 | printf("CMD TIMEOUT\n"); |
| 241 | return TIMEOUT; |
| 242 | } else if (stat & STATUS_RESP_CRC_ERR && cmd->resp_type & MMC_RSP_CRC) { |
| 243 | printf("cmd crc error\n"); |
| 244 | return -EILSEQ; |
| 245 | } |
| 246 | |
| 247 | if (cmd->resp_type & MMC_RSP_PRESENT) { |
| 248 | if (cmd->resp_type & MMC_RSP_136) { |
| 249 | for (i = 0; i < 4; i++) { |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 250 | a = readl(&host->base->res_fifo) & 0xFFFF; |
| 251 | b = readl(&host->base->res_fifo) & 0xFFFF; |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 252 | resp[i] = a << 16 | b; |
| 253 | } |
| 254 | } else { |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 255 | a = readl(&host->base->res_fifo) & 0xFFFF; |
| 256 | b = readl(&host->base->res_fifo) & 0xFFFF; |
| 257 | c = readl(&host->base->res_fifo) & 0xFFFF; |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 258 | resp[0] = a << 24 | b << 8 | c >> 8; |
| 259 | } |
| 260 | } |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) |
| 265 | { |
| 266 | u32 stat; |
| 267 | unsigned long timeout = get_ticks() + CONFIG_SYS_HZ; |
| 268 | |
| 269 | do { |
| 270 | stat = readl(&host->base->status); |
| 271 | if (stat & STATUS_ERR_MASK) |
| 272 | return stat; |
| 273 | if (timeout < get_ticks()) |
| 274 | return STATUS_TIME_OUT_READ; |
| 275 | if (stat & mask) |
| 276 | return 0; |
| 277 | } while (1); |
| 278 | } |
| 279 | |
| 280 | static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) |
| 281 | { |
| 282 | unsigned int stat; |
| 283 | u32 *buf = _buf; |
| 284 | |
| 285 | while (bytes > 3) { |
| 286 | stat = mxcmci_poll_status(host, |
| 287 | STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); |
| 288 | if (stat) |
| 289 | return stat; |
| 290 | *buf++ = readl(&host->base->buffer_access); |
| 291 | bytes -= 4; |
| 292 | } |
| 293 | |
| 294 | if (bytes) { |
| 295 | u8 *b = (u8 *)buf; |
| 296 | u32 tmp; |
| 297 | |
| 298 | stat = mxcmci_poll_status(host, |
| 299 | STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); |
| 300 | if (stat) |
| 301 | return stat; |
| 302 | tmp = readl(&host->base->buffer_access); |
| 303 | memcpy(b, &tmp, bytes); |
| 304 | } |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static int mxcmci_push(struct mxcmci_host *host, const void *_buf, int bytes) |
| 310 | { |
| 311 | unsigned int stat; |
| 312 | const u32 *buf = _buf; |
| 313 | |
| 314 | while (bytes > 3) { |
| 315 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); |
| 316 | if (stat) |
| 317 | return stat; |
| 318 | writel(*buf++, &host->base->buffer_access); |
| 319 | bytes -= 4; |
| 320 | } |
| 321 | |
| 322 | if (bytes) { |
| 323 | const u8 *b = (u8 *)buf; |
| 324 | u32 tmp; |
| 325 | |
| 326 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); |
| 327 | if (stat) |
| 328 | return stat; |
| 329 | |
| 330 | memcpy(&tmp, b, bytes); |
| 331 | writel(tmp, &host->base->buffer_access); |
| 332 | } |
| 333 | |
| 334 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); |
| 335 | if (stat) |
| 336 | return stat; |
| 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | static int mxcmci_transfer_data(struct mxcmci_host *host) |
| 342 | { |
| 343 | struct mmc_data *data = host->data; |
| 344 | int stat; |
| 345 | unsigned long length; |
| 346 | |
| 347 | length = data->blocks * data->blocksize; |
| 348 | host->datasize = 0; |
| 349 | |
| 350 | if (data->flags & MMC_DATA_READ) { |
| 351 | stat = mxcmci_pull(host, data->dest, length); |
| 352 | if (stat) |
| 353 | return stat; |
| 354 | host->datasize += length; |
| 355 | } else { |
| 356 | stat = mxcmci_push(host, (const void *)(data->src), length); |
| 357 | if (stat) |
| 358 | return stat; |
| 359 | host->datasize += length; |
| 360 | stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); |
| 361 | if (stat) |
| 362 | return stat; |
| 363 | } |
| 364 | return 0; |
| 365 | } |
| 366 | |
| 367 | static int mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) |
| 368 | { |
| 369 | int datastat; |
| 370 | int ret; |
| 371 | |
| 372 | ret = mxcmci_read_response(host, stat); |
| 373 | |
| 374 | if (ret) { |
| 375 | mxcmci_finish_request(host, host->cmd, host->data); |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | if (!host->data) { |
| 380 | mxcmci_finish_request(host, host->cmd, host->data); |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | datastat = mxcmci_transfer_data(host); |
| 385 | ret = mxcmci_finish_data(host, datastat); |
| 386 | mxcmci_finish_request(host, host->cmd, host->data); |
| 387 | return ret; |
| 388 | } |
| 389 | |
| 390 | static int mxcmci_request(struct mmc *mmc, struct mmc_cmd *cmd, |
| 391 | struct mmc_data *data) |
| 392 | { |
| 393 | struct mxcmci_host *host = mmc->priv; |
| 394 | unsigned int cmdat = host->cmdat; |
| 395 | u32 stat; |
| 396 | int ret; |
| 397 | |
| 398 | host->cmdat &= ~CMD_DAT_CONT_INIT; |
| 399 | if (data) { |
| 400 | mxcmci_setup_data(host, data); |
| 401 | |
| 402 | cmdat |= CMD_DAT_CONT_DATA_ENABLE; |
| 403 | |
| 404 | if (data->flags & MMC_DATA_WRITE) |
| 405 | cmdat |= CMD_DAT_CONT_WRITE; |
| 406 | } |
| 407 | |
| 408 | if ((ret = mxcmci_start_cmd(host, cmd, cmdat))) { |
| 409 | mxcmci_finish_request(host, cmd, data); |
| 410 | return ret; |
| 411 | } |
| 412 | |
| 413 | do { |
| 414 | stat = readl(&host->base->status); |
| 415 | writel(stat, &host->base->status); |
| 416 | } while (!(stat & STATUS_END_CMD_RESP)); |
| 417 | |
| 418 | return mxcmci_cmd_done(host, stat); |
| 419 | } |
| 420 | |
| 421 | static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) |
| 422 | { |
| 423 | unsigned int divider; |
| 424 | int prescaler = 0; |
| 425 | unsigned long clk_in = imx_get_perclk2(); |
| 426 | |
| 427 | while (prescaler <= 0x800) { |
| 428 | for (divider = 1; divider <= 0xF; divider++) { |
| 429 | int x; |
| 430 | |
| 431 | x = (clk_in / (divider + 1)); |
| 432 | |
| 433 | if (prescaler) |
| 434 | x /= (prescaler * 2); |
| 435 | |
| 436 | if (x <= clk_ios) |
| 437 | break; |
| 438 | } |
| 439 | if (divider < 0x10) |
| 440 | break; |
| 441 | |
| 442 | if (prescaler == 0) |
| 443 | prescaler = 1; |
| 444 | else |
| 445 | prescaler <<= 1; |
| 446 | } |
| 447 | |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 448 | writel((prescaler << 4) | divider, &host->base->clk_rate); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | static void mxcmci_set_ios(struct mmc *mmc) |
| 452 | { |
| 453 | struct mxcmci_host *host = mmc->priv; |
| 454 | if (mmc->bus_width == 4) |
| 455 | host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; |
| 456 | else |
| 457 | host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; |
| 458 | |
| 459 | if (mmc->clock) { |
| 460 | mxcmci_set_clk_rate(host, mmc->clock); |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 461 | writel(STR_STP_CLK_START_CLK, &host->base->str_stp_clk); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 462 | } else { |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 463 | writel(STR_STP_CLK_STOP_CLK, &host->base->str_stp_clk); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | host->clock = mmc->clock; |
| 467 | } |
| 468 | |
| 469 | static int mxcmci_init(struct mmc *mmc) |
| 470 | { |
| 471 | struct mxcmci_host *host = mmc->priv; |
| 472 | |
| 473 | mxcmci_softreset(host); |
| 474 | |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 475 | host->rev_no = readl(&host->base->rev_no); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 476 | if (host->rev_no != 0x400) { |
| 477 | printf("wrong rev.no. 0x%08x. aborting.\n", |
| 478 | host->rev_no); |
| 479 | return -ENODEV; |
| 480 | } |
| 481 | |
| 482 | /* recommended in data sheet */ |
Stefano Babic | 99c006a | 2010-03-13 21:09:00 +0100 | [diff] [blame] | 483 | writel(0x2db4, &host->base->read_to); |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 484 | |
| 485 | writel(0, &host->base->int_cntr); |
| 486 | |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | static int mxcmci_initialize(bd_t *bis) |
| 491 | { |
| 492 | struct mmc *mmc = NULL; |
| 493 | |
| 494 | mmc = malloc(sizeof(struct mmc)); |
| 495 | |
| 496 | if (!mmc) |
| 497 | return -ENOMEM; |
| 498 | |
| 499 | sprintf(mmc->name, "MXC MCI"); |
| 500 | mmc->send_cmd = mxcmci_request; |
| 501 | mmc->set_ios = mxcmci_set_ios; |
| 502 | mmc->init = mxcmci_init; |
Thierry Reding | 48972d9 | 2012-01-02 01:15:37 +0000 | [diff] [blame] | 503 | mmc->getcd = NULL; |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 504 | mmc->host_caps = MMC_MODE_4BIT; |
| 505 | |
| 506 | host->base = (struct mxcmci_regs *)CONFIG_MXC_MCI_REGS_BASE; |
| 507 | mmc->priv = host; |
| 508 | host->mmc = mmc; |
| 509 | |
| 510 | mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; |
| 511 | |
| 512 | mmc->f_min = imx_get_perclk2() >> 7; |
| 513 | mmc->f_max = imx_get_perclk2() >> 1; |
| 514 | |
John Rigby | 8feafcc | 2011-04-18 05:50:08 +0000 | [diff] [blame] | 515 | mmc->b_max = 0; |
| 516 | |
Ilya Yanok | ba3dbaf | 2009-06-08 04:12:49 +0400 | [diff] [blame] | 517 | mmc_register(mmc); |
| 518 | |
| 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | int mxc_mmc_init(bd_t *bis) |
| 523 | { |
| 524 | return mxcmci_initialize(bis); |
| 525 | } |