firmware/target/arm/imx233/sdmmc-imx233.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2011 by Amaury Pouly
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "config.h"
  22 #include "system.h"
  23 #include "sd.h"
  24 #include "mmc.h"
  25 #include "sdmmc.h"
  26 #include "ssp-imx233.h"
  27 #include "pinctrl-imx233.h"
  28 #include "partitions-imx233.h"
  29 #include "button-target.h"
  30 #include "fat.h"
  31 #include "disk.h"
  32 #include "usb.h"
  33 #include "debug.h"
  34 #include "string.h"
  35 #include "ata_idle_notify.h"
  36
  37 /** NOTE For convenience, this drivers relies on the many similar commands
  38  * between SD and MMC. The following assumptions are made:
  39  * - SD_SEND_STATUS = MMC_SEND_STATUS
  40  * - SD_SELECT_CARD = MMC_SELECT_CARD
  41  * - SD_TRAN = MMC_TRAN
  42  * - MMC_WRITE_MULTIPLE_BLOCK = SD_WRITE_MULTIPLE_BLOCK
  43  * - MMC_READ_MULTIPLE_BLOCK = SD_READ_MULTIPLE_BLOCK
  44  * - SD_STOP_TRANSMISSION = MMC_STOP_TRANSMISSION
  45  * - SD_DESELECT_CARD = MMC_DESELECT_CARD
  46  */
  47 #if SD_SEND_STATUS != MMC_SEND_STATUS || SD_SELECT_CARD != MMC_SELECT_CARD || \
  48     SD_TRAN != MMC_TRAN || MMC_WRITE_MULTIPLE_BLOCK != SD_WRITE_MULTIPLE_BLOCK || \
  49     MMC_READ_MULTIPLE_BLOCK != SD_READ_MULTIPLE_BLOCK || \
  50     SD_STOP_TRANSMISSION != MMC_STOP_TRANSMISSION || \
  51     SD_DESELECT_CARD != MMC_DESELECT_CARD
  52 #error SD/MMC mismatch
  53 #endif
  54
  55 struct sdmmc_config_t
  56 {
  57     const char *name; /* name(for debug) */
  58     int flags; /* flags */
  59     int power_pin; /* power pin */
  60     int power_delay; /* extra power up delay */
  61     int ssp; /* associated ssp block */
  62     int mode; /* mode (SD vs MMC) */
  63 };
  64
  65 /* flags */
  66 #define POWER_PIN       (1 << 0)
  67 #define POWER_INVERTED  (1 << 1)
  68 #define REMOVABLE       (1 << 2)
  69 #define DETECT_INVERTED (1 << 3)
  70 #define POWER_DELAY     (1 << 4)
  71 #define WINDOW          (1 << 5)
  72
  73 /* modes */
  74 #define SD_MODE         0
  75 #define MMC_MODE        1
  76
  77 #define PIN(bank,pin) ((bank) << 5 | (pin))
  78 #define PIN2BANK(v) ((v) >> 5)
  79 #define PIN2PIN(v) ((v) & 0x1f)
  80
  81 struct sdmmc_config_t sdmmc_config[] =
  82 {
  83 #ifdef SANSA_FUZEPLUS
  84     /* The Fuze+ uses pin #B0P8 for power */
  85     {
  86         .name = "microSD",
  87         .flags = POWER_PIN | POWER_INVERTED | REMOVABLE,
  88         .power_pin = PIN(0, 8),
  89         .ssp = 1,
  90         .mode = SD_MODE,
  91     },
  92     /* The Fuze+ uses pin #B1P29 for power */
  93     {
  94         .name = "eMMC",
  95         .flags = POWER_PIN | POWER_INVERTED | WINDOW | POWER_DELAY,
  96         .power_pin = PIN(1, 29),
  97         .power_delay = HZ / 5, /* extra delay, to ramp up voltage? */
  98         .ssp = 2,
  99         .mode = MMC_MODE,
 100     },
 101 #elif defined(CREATIVE_ZENXFI2)
 102     /* The Zen X-Fi2 uses pin B1P29 for power*/
 103     {
 104         .name = "microSD",
 105         .flags = POWER_PIN | REMOVABLE | DETECT_INVERTED,
 106         .power_pin = PIN(1, 29),
 107         .ssp = 1,
 108         .mode = SD_MODE,
 109     },
 110 #elif defined(CREATIVE_ZENXFI3)
 111     {
 112         .name = "internal/SD",
 113         .flags = WINDOW,
 114         .ssp = 2,
 115         .mode = SD_MODE,
 116     },
 117     /* The Zen X-Fi3 uses pin #B0P07 for power*/
 118     {
 119         .name = "microSD",
 120         .flags = POWER_PIN | POWER_INVERTED | REMOVABLE | POWER_DELAY,
 121         .power_pin = PIN(0, 7),
 122         .power_delay = HZ / 10, /* extra delay, to ramp up voltage? */
 123         .ssp = 1,
 124         .mode = SD_MODE,
 125     },
 126 #else
 127 #error You need to write the sd/mmc config!
 128 #endif
 129 };
 130
 131 #define SDMMC_NUM_DRIVES    (sizeof(sdmmc_config) / sizeof(sdmmc_config[0]))
 132
 133 #define SDMMC_CONF(drive) sdmmc_config[drive]
 134 #define SDMMC_FLAGS(drive) SDMMC_CONF(drive).flags
 135 #define SDMMC_SSP(drive) SDMMC_CONF(drive).ssp
 136 #define SDMMC_MODE(drive) SDMMC_CONF(drive).mode
 137
 138 /** WARNING
 139  * to be consistent with all our SD drivers, the .rca field of sdmmc_card_info
 140  * in reality holds (rca << 16) because all command arguments actually require
 141  * the RCA is the 16-bit msb. Be careful that this is not the actuall RCA ! */
 142
 143 /* common */
 144 static unsigned window_start[SDMMC_NUM_DRIVES];
 145 static unsigned window_end[SDMMC_NUM_DRIVES];
 146 static uint8_t aligned_buffer[SDMMC_NUM_DRIVES][512] CACHEALIGN_ATTR;
 147 static tCardInfo sdmmc_card_info[SDMMC_NUM_DRIVES];
 148 static struct mutex mutex[SDMMC_NUM_DRIVES];
 149 static int disk_last_activity[SDMMC_NUM_DRIVES];
 150 #define MIN_YIELD_PERIOD 5  /* ticks */
 151 static int next_yield = 0;
 152
 153 #define SDMMC_INFO(drive) sdmmc_card_info[drive]
 154 #define SDMMC_RCA(drive) SDMMC_INFO(drive).rca
 155
 156 /* sd only */
 157 static long sdmmc_stack[(DEFAULT_STACK_SIZE*2 + 0x200)/sizeof(long)];
 158 static const char sdmmc_thread_name[] = "sdmmc";
 159 static struct event_queue sdmmc_queue;
 160 #if CONFIG_STORAGE & STORAGE_SD
 161 static int sd_first_drive;
 162 static unsigned _sd_num_drives;
 163 static int sd_map[SDMMC_NUM_DRIVES]; /* sd->sdmmc map */
 164 #endif
 165 /* mmc only */
 166 #if CONFIG_STORAGE & STORAGE_MMC
 167 static int mmc_first_drive;
 168 static unsigned _mmc_num_drives;
 169 static int mmc_map[SDMMC_NUM_DRIVES]; /* mmc->sdmmc map */
 170 #endif
 171
 172 /* WARNING NOTE BUG FIXME
 173  * There are three numbering schemes involved in the driver:
 174  * - the sdmmc indexes into sdmmc_config[]
 175  * - the sd drive indexes
 176  * - the mmc drive indexes
 177  * By convention, [drive] refers to a sdmmc index whereas sd_drive/mmc_drive
 178  * refer to sd/mmc drive indexes. We keep two maps sd->sdmmc and mmc->sdmmc
 179  * to find the sdmmc index from the sd or mmc one */
 180
 181 static void sdmmc_detect_callback(int ssp)
 182 {
 183     /* This is called only if the state was stable for 300ms - check state
 184      * and post appropriate event. */
 185     if(imx233_ssp_sdmmc_detect(ssp))
 186         queue_broadcast(SYS_HOTSWAP_INSERTED, 0);
 187     else
 188         queue_broadcast(SYS_HOTSWAP_EXTRACTED, 0);
 189     imx233_ssp_sdmmc_setup_detect(ssp, true, sdmmc_detect_callback, false,
 190         imx233_ssp_sdmmc_is_detect_inverted(ssp));
 191 }
 192
 193 static void sdmmc_power(int drive, bool on)
 194 {
 195     /* power chip if needed */
 196     if(SDMMC_FLAGS(drive) & POWER_PIN)
 197     {
 198         int bank = PIN2BANK(SDMMC_CONF(drive).power_pin);
 199         int pin = PIN2PIN(SDMMC_CONF(drive).power_pin);
 200         imx233_pinctrl_acquire_pin(bank, pin, "sd/mmc power");
 201         imx233_set_pin_function(bank, pin, PINCTRL_FUNCTION_GPIO);
 202         imx233_enable_gpio_output(bank, pin, true);
 203         if(SDMMC_FLAGS(drive) & POWER_INVERTED)
 204             imx233_set_gpio_output(bank, pin, !on);
 205         else
 206             imx233_set_gpio_output(bank, pin, on);
 207     }
 208     if(SDMMC_FLAGS(drive) & POWER_DELAY)
 209         sleep(SDMMC_CONF(drive).power_delay);
 210     /* setup pins, never use alternatives pin on SSP1 because no device use it
 211      * but this could be made a flag */
 212     int bus_width = SDMMC_MODE(drive) == MMC_MODE ? 8 : 4;
 213     if(SDMMC_SSP(drive) == 1)
 214         imx233_ssp_setup_ssp1_sd_mmc_pins(on, bus_width, PINCTRL_DRIVE_4mA, false);
 215     else
 216         imx233_ssp_setup_ssp2_sd_mmc_pins(on, bus_width, PINCTRL_DRIVE_4mA);
 217 }
 218
 219 #define MCI_NO_RESP     0
 220 #define MCI_RESP        (1<<0)
 221 #define MCI_LONG_RESP   (1<<1)
 222 #define MCI_ACMD        (1<<2) /* sd only */
 223 #define MCI_NOCRC       (1<<3)
 224 #define MCI_BUSY        (1<<4)
 225
 226 static bool send_cmd(int drive, uint8_t cmd, uint32_t arg, uint32_t flags, uint32_t *resp)
 227 {
 228     if((flags & MCI_ACMD) && !send_cmd(drive, SD_APP_CMD, SDMMC_RCA(drive), MCI_RESP, resp))
 229         return false;
 230
 231     enum imx233_ssp_resp_t resp_type = (flags & MCI_LONG_RESP) ? SSP_LONG_RESP :
 232         (flags & MCI_RESP) ? SSP_SHORT_RESP : SSP_NO_RESP;
 233     enum imx233_ssp_error_t ret = imx233_ssp_sd_mmc_transfer(SDMMC_SSP(drive), cmd,
 234         arg, resp_type, NULL, 0, !!(flags & MCI_BUSY), false, resp);
 235     if(resp_type == SSP_LONG_RESP)
 236     {
 237         /* Our SD codes assume most significant word first, so reverse resp */
 238         uint32_t tmp = resp[0];
 239         resp[0] = resp[3];
 240         resp[3] = tmp;
 241         tmp = resp[1];
 242         resp[1] = resp[2];
 243         resp[2] = tmp;
 244     }
 245     return ret == SSP_SUCCESS;
 246 }
 247
 248 static int wait_for_state(int drive, unsigned state)
 249 {
 250     unsigned long response;
 251     unsigned int timeout = current_tick + 5*HZ;
 252     int cmd_retry = 10;
 253
 254     while (1)
 255     {
 256         /* NOTE: rely on SD_SEND_STATUS=MMC_SEND_STATUS */
 257         while(!send_cmd(drive, SD_SEND_STATUS, SDMMC_RCA(drive), MCI_RESP, &response) && cmd_retry > 0)
 258             cmd_retry--;
 259
 260         if(cmd_retry <= 0)
 261             return -1;
 262
 263         if(((response >> 9) & 0xf) == state)
 264             return 0;
 265
 266         if(TIME_AFTER(current_tick, timeout))
 267             return -10 * ((response >> 9) & 0xf);
 268
 269         if(TIME_AFTER(current_tick, next_yield))
 270         {
 271             yield();
 272             next_yield = current_tick + MIN_YIELD_PERIOD;
 273         }
 274     }
 275
 276     return 0;
 277 }
 278
 279 #if CONFIG_STORAGE & STORAGE_SD
 280 static int init_sd_card(int drive)
 281 {
 282     int ssp = SDMMC_SSP(drive);
 283     sdmmc_power(drive, false);
 284     sdmmc_power(drive, true);
 285     imx233_ssp_start(ssp);
 286     imx233_ssp_softreset(ssp);
 287     imx233_ssp_set_mode(ssp, HW_SSP_CTRL1__SSP_MODE__SD_MMC);
 288     /* SSPCLK @ 96MHz
 289      * gives bitrate of 96000 / 240 / 1 = 400kHz */
 290     imx233_ssp_set_timings(ssp, 240, 0, 0xffff);
 291
 292     imx233_ssp_sd_mmc_power_up_sequence(ssp);
 293     imx233_ssp_set_bus_width(ssp, 1);
 294     imx233_ssp_set_block_size(ssp, 9);
 295
 296     SDMMC_RCA(drive) = 0;
 297     bool sd_v2 = false;
 298     uint32_t resp;
 299     long init_timeout;
 300     /* go to idle state */
 301     if(!send_cmd(drive, SD_GO_IDLE_STATE, 0, MCI_NO_RESP, NULL))
 302         return -1;
 303     /* CMD8 Check for v2 sd card.  Must be sent before using ACMD41
 304        Non v2 cards will not respond to this command */
 305     if(send_cmd(drive, SD_SEND_IF_COND, 0x1AA, MCI_RESP, &resp))
 306         if((resp & 0xFFF) == 0x1AA)
 307             sd_v2 = true;
 308     /* timeout for initialization is 1sec, from SD Specification 2.00 */
 309     init_timeout = current_tick + HZ;
 310     do
 311     {
 312         /* this timeout is the only valid error for this loop*/
 313         if(TIME_AFTER(current_tick, init_timeout))
 314             return -2;
 315
 316         /* ACMD41 For v2 cards set HCS bit[30] & send host voltage range to all */
 317         if(!send_cmd(drive, SD_APP_OP_COND, (0x00FF8000 | (sd_v2 ? 1<<30 : 0)),
 318                 MCI_ACMD|MCI_NOCRC|MCI_RESP, &SDMMC_INFO(drive).ocr))
 319             return -100;
 320     } while(!(SDMMC_INFO(drive).ocr & (1<<31)));
 321
 322     /* CMD2 send CID */
 323     if(!send_cmd(drive, SD_ALL_SEND_CID, 0, MCI_RESP|MCI_LONG_RESP, SDMMC_INFO(drive).cid))
 324         return -3;
 325
 326     /* CMD3 send RCA */
 327     if(!send_cmd(drive, SD_SEND_RELATIVE_ADDR, 0, MCI_RESP, &SDMMC_INFO(drive).rca))
 328         return -4;
 329
 330     /* Try to switch V2 cards to HS timings, non HS seem to ignore this */
 331     if(sd_v2)
 332     {
 333         /*  CMD7 w/rca: Select card to put it in TRAN state */
 334         if(!send_cmd(drive, SD_SELECT_CARD, SDMMC_RCA(drive), MCI_RESP, NULL))
 335             return -5;
 336
 337         if(wait_for_state(drive, SD_TRAN))
 338             return -6;
 339
 340         /* CMD6 */
 341         if(!send_cmd(drive, SD_SWITCH_FUNC, 0x80fffff1, MCI_NO_RESP, NULL))
 342             return -7;
 343         sleep(HZ/10);
 344
 345         /*  go back to STBY state so we can read csd */
 346         /*  CMD7 w/rca=0:  Deselect card to put it in STBY state */
 347         if(!send_cmd(drive, SD_DESELECT_CARD, 0, MCI_NO_RESP, NULL))
 348             return -8;
 349     }
 350
 351     /* CMD9 send CSD */
 352     if(!send_cmd(drive, SD_SEND_CSD, SDMMC_RCA(drive), MCI_RESP|MCI_LONG_RESP,
 353             SDMMC_INFO(drive).csd))
 354         return -9;
 355
 356     sd_parse_csd(&SDMMC_INFO(drive));
 357     window_start[drive] = 0;
 358     window_end[drive] = SDMMC_INFO(drive).numblocks;
 359
 360     /* SSPCLK @ 96MHz
 361      * gives bitrate of 96 / 4 / 1 = 24MHz */
 362     imx233_ssp_set_timings(ssp, 4, 0, 0xffff);
 363
 364     /* CMD7 w/rca: Select card to put it in TRAN state */
 365     if(!send_cmd(drive, SD_SELECT_CARD, SDMMC_RCA(drive), MCI_RESP, &resp))
 366         return -12;
 367     if(wait_for_state(drive, SD_TRAN))
 368         return -13;
 369
 370     /* ACMD6: set bus width to 4-bit */
 371     if(!send_cmd(drive, SD_SET_BUS_WIDTH, 2, MCI_RESP|MCI_ACMD, &resp))
 372         return -15;
 373     /* ACMD42: disconnect the pull-up resistor on CD/DAT3 */
 374     if(!send_cmd(drive, SD_SET_CLR_CARD_DETECT, 0, MCI_RESP|MCI_ACMD, &resp))
 375         return -17;
 376
 377     /* Switch to 4-bit */
 378     imx233_ssp_set_bus_width(ssp, 4);
 379
 380     SDMMC_INFO(drive).initialized = 1;
 381
 382     return 0;
 383 }
 384 #endif
 385
 386 #if CONFIG_STORAGE & STORAGE_MMC
 387 static int init_mmc_drive(int drive)
 388 {
 389     int ssp = SDMMC_SSP(drive);
 390     /* we can choose the RCA of mmc cards: pick drive. Following our convention,
 391      * .rca is actually RCA << 16 */
 392     SDMMC_RCA(drive) = drive << 16;
 393
 394     sdmmc_power(drive, false);
 395     sdmmc_power(drive, true);
 396     imx233_ssp_start(ssp);
 397     imx233_ssp_softreset(ssp);
 398     imx233_ssp_set_mode(ssp, HW_SSP_CTRL1__SSP_MODE__SD_MMC);
 399     /* SSPCLK @ 96MHz
 400      * gives bitrate of 96000 / 240 / 1 = 400kHz */
 401     imx233_ssp_set_timings(ssp, 240, 0, 0xffff);
 402     imx233_ssp_sd_mmc_power_up_sequence(ssp);
 403     imx233_ssp_set_bus_width(ssp, 1);
 404     imx233_ssp_set_block_size(ssp, 9);
 405     /* go to idle state */
 406     if(!send_cmd(drive, MMC_GO_IDLE_STATE, 0, MCI_NO_RESP, NULL))
 407         return -1;
 408     /* send op cond until the card respond with busy bit set; it must complete within 1sec */
 409     unsigned timeout = current_tick + HZ;
 410     bool ret = false;
 411     do
 412     {
 413         uint32_t ocr;
 414         ret = send_cmd(drive, MMC_SEND_OP_COND, 0x40ff8000, MCI_RESP, &ocr);
 415         if(ret && ocr & (1 << 31))
 416             break;
 417     }while(!TIME_AFTER(current_tick, timeout));
 418
 419     if(!ret)
 420         return -2;
 421     /* get CID */
 422     uint32_t cid[4];
 423     if(!send_cmd(drive, MMC_ALL_SEND_CID, 0, MCI_LONG_RESP, cid))
 424         return -3;
 425     /* Set RCA */
 426     uint32_t status;
 427     if(!send_cmd(drive, MMC_SET_RELATIVE_ADDR, SDMMC_RCA(drive), MCI_RESP, &status))
 428         return -4;
 429     /* Select card */
 430     if(!send_cmd(drive, MMC_SELECT_CARD, SDMMC_RCA(drive), MCI_RESP, &status))
 431         return -5;
 432     /* Check TRAN state */
 433     if(wait_for_state(drive, MMC_TRAN))
 434         return -6;
 435     /* Switch to 8-bit bus */
 436     if(!send_cmd(drive, MMC_SWITCH, 0x3b70200, MCI_RESP|MCI_BUSY, &status))
 437         return -8;
 438     /* switch error ? */
 439     if(status & 0x80)
 440         return -9;
 441     imx233_ssp_set_bus_width(ssp, 8);
 442     /* Switch to high speed mode */
 443     if(!send_cmd(drive, MMC_SWITCH, 0x3b90100,  MCI_RESP|MCI_BUSY, &status))
 444         return -10;
 445     /* switch error ?*/
 446     if(status & 0x80)
 447         return -11;
 448     /* SSPCLK @ 96MHz
 449      * gives bitrate of 96 / 2 / 1 = 48MHz */
 450     imx233_ssp_set_timings(ssp, 2, 0, 0xffff);
 451
 452     /* read extended CSD */
 453     {
 454         uint8_t ext_csd[512];
 455         if(imx233_ssp_sd_mmc_transfer(ssp, 8, 0, SSP_SHORT_RESP, aligned_buffer[drive], 1, true, true, &status))
 456             return -12;
 457         memcpy(ext_csd, aligned_buffer[drive], 512);
 458         uint32_t *sec_count = (void *)&ext_csd[212];
 459         window_start[drive] = 0;
 460         window_end[drive] = *sec_count;
 461     }
 462     /* deselect card */
 463     if(!send_cmd(drive, MMC_DESELECT_CARD, 0, MCI_NO_RESP, NULL))
 464         return -13;
 465
 466     return 0;
 467 }
 468 #endif
 469
 470 // low-level function, don't call directly!
 471 static int __xfer_sectors(int drive, unsigned long start, int count, void *buf, bool read)
 472 {
 473     uint32_t resp;
 474     int ret = 0;
 475     while(count != 0)
 476     {
 477         int this_count = MIN(count, IMX233_MAX_SINGLE_DMA_XFER_SIZE / 512);
 478         /* Set bank_start to the correct unit (blocks or bytes).
 479          * MMC drives use block addressing, SD cards bytes or blocks */
 480         int bank_start = start;
 481         if(SDMMC_MODE(drive) == SD_MODE && !(SDMMC_INFO(drive).ocr & (1<<30)))   /* not SDHC */
 482             bank_start *= SD_BLOCK_SIZE;
 483         /* issue read/write
 484          * NOTE: rely on SD_{READ,WRITE}_MULTIPLE_BLOCK=MMC_{READ,WRITE}_MULTIPLE_BLOCK */
 485         ret = imx233_ssp_sd_mmc_transfer(SDMMC_SSP(drive),
 486             read ? SD_READ_MULTIPLE_BLOCK : SD_WRITE_MULTIPLE_BLOCK,
 487             bank_start, SSP_SHORT_RESP, buf, this_count, false, read, &resp);
 488         if(ret != SSP_SUCCESS)
 489             break;
 490         /* stop transmission
 491          * NOTE: rely on SD_STOP_TRANSMISSION=MMC_STOP_TRANSMISSION */
 492         if(!send_cmd(drive, SD_STOP_TRANSMISSION, 0, MCI_RESP|MCI_BUSY, &resp))
 493         {
 494             ret = -15;
 495             break;
 496         }
 497         count -= this_count;
 498         start += this_count;
 499         buf += this_count * 512;
 500     }
 501     return ret;
 502 }
 503
 504 static int transfer_sectors(int drive, unsigned long start, int count, void *buf, bool read)
 505 {
 506     int ret = 0;
 507
 508     /* update disk activity */
 509     disk_last_activity[drive] = current_tick;
 510
 511     /* lock per-drive mutex */
 512     mutex_lock(&mutex[drive]);
 513
 514     /* for SD cards, init if necessary */
 515 #if CONFIG_STORAGE & STORAGE_SD
 516     if(SDMMC_MODE(drive) == SD_MODE && SDMMC_INFO(drive).initialized <= 0)
 517     {
 518         ret = init_sd_card(drive);
 519         if(SDMMC_INFO(drive).initialized <= 0)
 520             goto Lend;
 521     }
 522 #endif
 523
 524     /* check window */
 525     start += window_start[drive];
 526     if((start + count) > window_end[drive])
 527     {
 528         ret = -201;
 529         goto Lend;
 530     }
 531     /* select card.
 532      * NOTE: rely on SD_SELECT_CARD=MMC_SELECT_CARD */
 533     if(!send_cmd(drive, SD_SELECT_CARD, SDMMC_RCA(drive), MCI_NO_RESP, NULL))
 534     {
 535         ret = -20;
 536         goto Lend;
 537     }
 538     /* wait for TRAN state */
 539     /* NOTE: rely on SD_TRAN=MMC_TRAN */
 540     ret = wait_for_state(drive, SD_TRAN);
 541     if(ret < 0)
 542         goto Ldeselect;
 543
 544     /**
 545      * NOTE: we need to make sure dma transfers are aligned. This handled
 546      * differently for read and write transfers. We do not repeat it each
 547      * time but it should be noted that all transfers are limited by
 548      * IMX233_MAX_SINGLE_DMA_XFER_SIZE and thus need to be split if needed.
 549      *
 550      * Read transfers:
 551      *   If the buffer is already aligned, transfer everything at once.
 552      *   Otherwise, transfer all sectors but one to the sub-buffer starting
 553      *   on the next cache ligned and then move the data. Then transfer the
 554      *   last sector to the aligned_buffer and then copy to the buffer.
 555      *
 556      * Write transfers:
 557      *   If the buffer is already aligned, transfer everything at once.
 558      *   Otherwise, copy the first sector to the aligned_buffer and transfer.
 559      *   Then move all other sectors within the buffer to make it cache
 560      *   aligned and transfer it.
 561      */
 562     if(read)
 563     {
 564         void *ptr = CACHEALIGN_UP(buf);
 565         if(buf != ptr)
 566         {
 567             // copy count-1 sector and then move within the buffer
 568             ret = __xfer_sectors(drive, start, count - 1, ptr, read);
 569             memmove(buf, ptr, 512 * (count - 1));
 570             if(ret >= 0)
 571             {
 572                 // transfer the last sector the aligned_buffer and copy
 573                 ret = __xfer_sectors(drive, start + count - 1, 1,
 574                     aligned_buffer[drive], read);
 575                 memcpy(buf + 512 * (count - 1), aligned_buffer[drive], 512);
 576             }
 577         }
 578         else
 579             ret = __xfer_sectors(drive, start, count, buf, read);
 580     }
 581     else
 582     {
 583         void *ptr = CACHEALIGN_UP(buf);
 584         if(buf != ptr)
 585         {
 586             // transfer the first sector to aligned_buffer and copy
 587             memcpy(aligned_buffer[drive], buf, 512);
 588             ret = __xfer_sectors(drive, start, 1, aligned_buffer[drive], read);
 589             if(ret >= 0)
 590             {
 591                 // move within the buffer and transfer
 592                 memmove(ptr, buf + 512, 512 * (count - 1));
 593                 ret = __xfer_sectors(drive, start + 1, count - 1, ptr, read);
 594             }
 595         }
 596         else
 597             ret = __xfer_sectors(drive, start, count, buf, read);
 598     }
 599
 600     /* deselect card */
 601     Ldeselect:
 602     /*  CMD7 w/rca =0 : deselects card & puts it in STBY state
 603      * NOTE: rely on SD_DESELECT_CARD=MMC_DESELECT_CARD */
 604     if(!send_cmd(drive, SD_DESELECT_CARD, 0, MCI_NO_RESP, NULL))
 605         ret = -23;
 606     Lend:
 607     /* release per-drive mutex */
 608     mutex_unlock(&mutex[drive]);
 609     return ret;
 610 }
 611
 612 static int init_drive(int drive)
 613 {
 614     int ret;
 615     switch(SDMMC_MODE(drive))
 616     {
 617 #if CONFIG_STORAGE & STORAGE_SD
 618         case SD_MODE: ret = init_sd_card(drive); break;
 619 #endif
 620 #if CONFIG_STORAGE & STORAGE_MMC
 621         case MMC_MODE: ret = init_mmc_drive(drive); break;
 622 #endif
 623         default: ret = 0;
 624     }
 625     if(ret < 0)
 626         return ret;
 627
 628     /* compute window */
 629     if((SDMMC_FLAGS(drive) & WINDOW) && imx233_partitions_is_window_enabled())
 630     {
 631         uint8_t mbr[512];
 632         int ret = transfer_sectors(drive, 0, 1, mbr, true);
 633         if(ret)
 634             panicf("Cannot read MBR: %d", ret);
 635         ret = imx233_partitions_compute_window(mbr, &window_start[drive],
 636             &window_end[drive]);
 637         if(ret)
 638             panicf("cannot compute partitions window: %d", ret);
 639         SDMMC_INFO(drive).numblocks = window_end[drive] - window_start[drive];
 640     }
 641
 642     return 0;
 643 }
 644
 645 static void sdmmc_thread(void) NORETURN_ATTR;
 646 static void sdmmc_thread(void)
 647 {
 648     struct queue_event ev;
 649     bool idle_notified = false;
 650     int timeout = 0;
 651
 652     while (1)
 653     {
 654         queue_wait_w_tmo(&sdmmc_queue, &ev, HZ);
 655
 656         switch(ev.id)
 657         {
 658 #if CONFIG_STORAGE & STORAGE_SD
 659         case SYS_HOTSWAP_INSERTED:
 660         case SYS_HOTSWAP_EXTRACTED:
 661         {
 662             int microsd_init = 1;
 663              /* lock-out FAT activity first -
 664               * prevent deadlocking via disk_mount that
 665               * would cause a reverse-order attempt with
 666               * another thread */
 667             fat_lock();
 668
 669             /* We now have exclusive control of fat cache and sd.
 670              * Release "by force", ensure file
 671              * descriptors aren't leaked and any busy
 672              * ones are invalid if mounting. */
 673             for(unsigned sd_drive = 0; sd_drive < _sd_num_drives; sd_drive++)
 674             {
 675                 int drive = sd_map[sd_drive];
 676                 /* Skip non-removable drivers */
 677                 if(!sd_removable(sd_drive))
 678                     continue;
 679                 /* lock-out card activity - direct calls
 680                  * into driver that bypass the fat cache */
 681                 mutex_lock(&mutex[drive]);
 682                 disk_unmount(sd_first_drive + sd_drive);
 683                 /* Force card init for new card, re-init for re-inserted one or
 684                  * clear if the last attempt to init failed with an error. */
 685                 SDMMC_INFO(sd_map[sd_drive]).initialized = 0;
 686
 687                 if(ev.id == SYS_HOTSWAP_INSERTED)
 688                 {
 689                     microsd_init = init_drive(drive);
 690                     if(microsd_init < 0) /* initialisation failed */
 691                         panicf("%s init failed : %d", SDMMC_CONF(sd_map[sd_drive]).name, microsd_init);
 692
 693                     microsd_init = disk_mount(sd_first_drive + sd_drive); /* 0 if fail */
 694                 }
 695                 /*
 696                 * Mount succeeded, or this was an EXTRACTED event,
 697                 * in both cases notify the system about the changed filesystems
 698                 */
 699                 if(microsd_init)
 700                     queue_broadcast(SYS_FS_CHANGED, 0);
 701                 /* unlock card */
 702                 mutex_unlock(&mutex[drive]);
 703             }
 704             /* Access is now safe */
 705             fat_unlock();
 706             break;
 707         }
 708 #endif
 709         case SYS_TIMEOUT:
 710 #if CONFIG_STORAGE & STORAGE_SD
 711             timeout = MAX(timeout, sd_last_disk_activity()+(3*HZ));
 712 #endif
 713 #if CONFIG_STORAGE & STORAGE_MMC
 714             timeout = MAX(timeout, mmc_last_disk_activity()+(3*HZ));
 715 #endif
 716             if(TIME_BEFORE(current_tick, timeout))
 717             {
 718                 idle_notified = false;
 719             }
 720             else
 721             {
 722                 next_yield = current_tick;
 723
 724                 if(!idle_notified)
 725                 {
 726                     call_storage_idle_notifys(false);
 727                     idle_notified = true;
 728                 }
 729             }
 730             break;
 731             break;
 732         case SYS_USB_CONNECTED:
 733             usb_acknowledge(SYS_USB_CONNECTED_ACK);
 734             /* Wait until the USB cable is extracted again */
 735             usb_wait_for_disconnect(&sdmmc_queue);
 736             break;
 737         }
 738     }
 739 }
 740
 741 static int sdmmc_init(void)
 742 {
 743     static int is_initialized = false;
 744     if(is_initialized)
 745         return 0;
 746     is_initialized = true;
 747     for(unsigned drive = 0; drive < SDMMC_NUM_DRIVES; drive++)
 748         mutex_init(&mutex[drive]);
 749
 750     queue_init(&sdmmc_queue, true);
 751     create_thread(sdmmc_thread, sdmmc_stack, sizeof(sdmmc_stack), 0,
 752             sdmmc_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE) IF_COP(, CPU));
 753
 754     for(unsigned drive = 0; drive < SDMMC_NUM_DRIVES; drive++)
 755     {
 756         if(SDMMC_FLAGS(drive) & REMOVABLE)
 757             imx233_ssp_sdmmc_setup_detect(SDMMC_SSP(drive), true, sdmmc_detect_callback,
 758                 false, SDMMC_FLAGS(drive) & DETECT_INVERTED);
 759     }
 760
 761     return 0;
 762 }
 763
 764 static int sdmmc_present(int drive)
 765 {
 766     if(SDMMC_FLAGS(drive) & REMOVABLE)
 767         return imx233_ssp_sdmmc_detect(SDMMC_SSP(drive));
 768     else
 769         return true;
 770 }
 771
 772 static inline int sdmmc_removable(int drive)
 773 {
 774     return SDMMC_FLAGS(drive) & REMOVABLE;
 775 }
 776
 777 #if CONFIG_STORAGE & STORAGE_SD
 778 int sd_init(void)
 779 {
 780     int ret = sdmmc_init();
 781     if(ret < 0) return ret;
 782
 783     _sd_num_drives = 0;
 784     for(unsigned drive = 0; drive < SDMMC_NUM_DRIVES; drive++)
 785         if(SDMMC_MODE(drive) == SD_MODE)
 786             sd_map[_sd_num_drives++] = drive;
 787     return 0;
 788 }
 789
 790 tCardInfo *card_get_info_target(int sd_card_no)
 791 {
 792     return &SDMMC_INFO(sd_map[sd_card_no]);
 793 }
 794
 795 int sd_num_drives(int first_drive)
 796 {
 797     sd_first_drive = first_drive;
 798     return _sd_num_drives;
 799 }
 800
 801 bool sd_present(IF_MV_NONVOID(int sd_drive))
 802 {
 803     return sdmmc_present(sd_map[sd_drive]);
 804 }
 805
 806 bool sd_removable(IF_MV_NONVOID(int sd_drive))
 807 {
 808     return sdmmc_removable(sd_map[sd_drive]);
 809 }
 810
 811 long sd_last_disk_activity(void)
 812 {
 813     long last = 0;
 814     for(unsigned i = 0; i < _sd_num_drives; i++)
 815         last = MAX(last, disk_last_activity[sd_map[i]]);
 816     return last;
 817 }
 818
 819 void sd_enable(bool on)
 820 {
 821     (void) on;
 822 }
 823
 824 int sd_read_sectors(IF_MD2(int sd_drive,) unsigned long start, int count, void *buf)
 825 {
 826     return transfer_sectors(sd_map[sd_drive], start, count, buf, true);
 827 }
 828
 829 int sd_write_sectors(IF_MD2(int sd_drive,) unsigned long start, int count, const void* buf)
 830 {
 831     return transfer_sectors(sd_map[sd_drive], start, count, (void *)buf, false);
 832 }
 833 #endif
 834
 835 #if CONFIG_STORAGE & STORAGE_MMC
 836 int mmc_init(void)
 837 {
 838     int ret = sdmmc_init();
 839     if(ret < 0) return ret;
 840
 841     _sd_num_drives = 0;
 842     for(unsigned drive = 0; drive < SDMMC_NUM_DRIVES; drive++)
 843         if(SDMMC_MODE(drive) == MMC_MODE)
 844         {
 845             mmc_map[_mmc_num_drives++] = drive;
 846             init_drive(drive);
 847         }
 848     return 0;
 849 }
 850
 851 void mmc_get_info(IF_MD2(int mmc_drive,) struct storage_info *info)
 852 {
 853     int drive = mmc_map[mmc_drive];
 854     info->sector_size = 512;
 855     info->num_sectors = window_end[drive] - window_start[drive];
 856     info->vendor = "Rockbox";
 857     info->product = "Internal Storage";
 858     info->revision = "0.00";
 859 }
 860
 861 int mmc_num_drives(int first_drive)
 862 {
 863     mmc_first_drive = first_drive;
 864     return _mmc_num_drives;
 865 }
 866
 867 bool mmc_present(IF_MV_NONVOID(int mmc_drive))
 868 {
 869     return sdmmc_present(mmc_map[mmc_drive]);
 870 }
 871
 872 bool mmc_removable(IF_MV_NONVOID(int mmc_drive))
 873 {
 874     return sdmmc_removable(mmc_map[mmc_drive]);
 875 }
 876
 877 long mmc_last_disk_activity(void)
 878 {
 879     long last = 0;
 880     for(unsigned i = 0; i < _mmc_num_drives; i++)
 881         last = MAX(last, disk_last_activity[mmc_map[i]]);
 882     return last;
 883 }
 884
 885 void mmc_enable(bool on)
 886 {
 887     (void) on;
 888 }
 889
 890 void mmc_sleep(void)
 891 {
 892 }
 893
 894 void mmc_sleepnow(void)
 895 {
 896 }
 897
 898 bool mmc_disk_is_active(void)
 899 {
 900     return false;
 901 }
 902
 903 bool mmc_usb_active(void)
 904 {
 905     return mmc_disk_is_active();
 906 }
 907
 908 int mmc_soft_reset(void)
 909 {
 910     return 0;
 911 }
 912
 913 int mmc_flush(void)
 914 {
 915     return 0;
 916 }
 917
 918 void mmc_spin(void)
 919 {
 920 }
 921
 922 void mmc_spindown(int seconds)
 923 {
 924     (void) seconds;
 925 }
 926
 927 int mmc_spinup_time(void)
 928 {
 929     return 0;
 930 }
 931
 932 int mmc_read_sectors(IF_MD2(int mmc_drive,) unsigned long start, int count, void *buf)
 933 {
 934     return transfer_sectors(mmc_map[mmc_drive], start, count, buf, true);
 935 }
 936
 937 int mmc_write_sectors(IF_MD2(int mmc_drive,) unsigned long start, int count, const void* buf)
 938 {
 939     return transfer_sectors(mmc_map[mmc_drive], start, count, (void *)buf, false);
 940 }
 941
 942 #endif