drivers/mmc/host/sdhci.h

   1 /*
   2  *  linux/drivers/mmc/host/sdhci.h - Secure Digital Host Controller Interface driver
   3  *
   4  * Header file for Host Controller registers and I/O accessors.
   5  *
   6  *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or (at
  11  * your option) any later version.
  12  */
  13 #ifndef __SDHCI_HW_H
  14 #define __SDHCI_HW_H
  15
  16 #include <linux/scatterlist.h>
  17 #include <linux/compiler.h>
  18 #include <linux/types.h>
  19 #include <linux/io.h>
  20
  21 #include <linux/mmc/host.h>
  22
  23 /*
  24  * Controller registers
  25  */
  26
  27 #define SDHCI_DMA_ADDRESS       0x00
  28 #define SDHCI_ARGUMENT2         SDHCI_DMA_ADDRESS
  29
  30 #define SDHCI_BLOCK_SIZE        0x04
  31 #define  SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))
  32
  33 #define SDHCI_BLOCK_COUNT       0x06
  34
  35 #define SDHCI_ARGUMENT          0x08
  36
  37 #define SDHCI_TRANSFER_MODE     0x0C
  38 #define  SDHCI_TRNS_DMA         0x01
  39 #define  SDHCI_TRNS_BLK_CNT_EN  0x02
  40 #define  SDHCI_TRNS_AUTO_CMD12  0x04
  41 #define  SDHCI_TRNS_AUTO_CMD23  0x08
  42 #define  SDHCI_TRNS_READ        0x10
  43 #define  SDHCI_TRNS_MULTI       0x20
  44
  45 #define SDHCI_COMMAND           0x0E
  46 #define  SDHCI_CMD_RESP_MASK    0x03
  47 #define  SDHCI_CMD_CRC          0x08
  48 #define  SDHCI_CMD_INDEX        0x10
  49 #define  SDHCI_CMD_DATA         0x20
  50 #define  SDHCI_CMD_ABORTCMD     0xC0
  51
  52 #define  SDHCI_CMD_RESP_NONE    0x00
  53 #define  SDHCI_CMD_RESP_LONG    0x01
  54 #define  SDHCI_CMD_RESP_SHORT   0x02
  55 #define  SDHCI_CMD_RESP_SHORT_BUSY 0x03
  56
  57 #define SDHCI_MAKE_CMD(c, f) (((c & 0xff) << 8) | (f & 0xff))
  58 #define SDHCI_GET_CMD(c) ((c>>8) & 0x3f)
  59
  60 #define SDHCI_RESPONSE          0x10
  61
  62 #define SDHCI_BUFFER            0x20
  63
  64 #define SDHCI_PRESENT_STATE     0x24
  65 #define  SDHCI_CMD_INHIBIT      0x00000001
  66 #define  SDHCI_DATA_INHIBIT     0x00000002
  67 #define  SDHCI_DOING_WRITE      0x00000100
  68 #define  SDHCI_DOING_READ       0x00000200
  69 #define  SDHCI_SPACE_AVAILABLE  0x00000400
  70 #define  SDHCI_DATA_AVAILABLE   0x00000800
  71 #define  SDHCI_CARD_PRESENT     0x00010000
  72 #define  SDHCI_WRITE_PROTECT    0x00080000
  73 #define  SDHCI_DATA_LVL_MASK    0x00F00000
  74 #define   SDHCI_DATA_LVL_SHIFT  20
  75 #define   SDHCI_DATA_0_LVL_MASK 0x00100000
  76
  77 #define SDHCI_HOST_CONTROL      0x28
  78 #define  SDHCI_CTRL_LED         0x01
  79 #define  SDHCI_CTRL_4BITBUS     0x02
  80 #define  SDHCI_CTRL_HISPD       0x04
  81 #define  SDHCI_CTRL_DMA_MASK    0x18
  82 #define   SDHCI_CTRL_SDMA       0x00
  83 #define   SDHCI_CTRL_ADMA1      0x08
  84 #define   SDHCI_CTRL_ADMA32     0x10
  85 #define   SDHCI_CTRL_ADMA64     0x18
  86 #define   SDHCI_CTRL_8BITBUS    0x20
  87
  88 #define SDHCI_POWER_CONTROL     0x29
  89 #define  SDHCI_POWER_ON         0x01
  90 #define  SDHCI_POWER_180        0x0A
  91 #define  SDHCI_POWER_300        0x0C
  92 #define  SDHCI_POWER_330        0x0E
  93
  94 #define SDHCI_BLOCK_GAP_CONTROL 0x2A
  95
  96 #define SDHCI_WAKE_UP_CONTROL   0x2B
  97 #define  SDHCI_WAKE_ON_INT      0x01
  98 #define  SDHCI_WAKE_ON_INSERT   0x02
  99 #define  SDHCI_WAKE_ON_REMOVE   0x04
 100
 101 #define SDHCI_CLOCK_CONTROL     0x2C
 102 #define  SDHCI_DIVIDER_SHIFT    8
 103 #define  SDHCI_DIVIDER_HI_SHIFT 6
 104 #define  SDHCI_DIV_MASK 0xFF
 105 #define  SDHCI_DIV_MASK_LEN     8
 106 #define  SDHCI_DIV_HI_MASK      0x300
 107 #define  SDHCI_PROG_CLOCK_MODE  0x0020
 108 #define  SDHCI_CLOCK_CARD_EN    0x0004
 109 #define  SDHCI_CLOCK_INT_STABLE 0x0002
 110 #define  SDHCI_CLOCK_INT_EN     0x0001
 111
 112 #define SDHCI_TIMEOUT_CONTROL   0x2E
 113
 114 #define SDHCI_SOFTWARE_RESET    0x2F
 115 #define  SDHCI_RESET_ALL        0x01
 116 #define  SDHCI_RESET_CMD        0x02
 117 #define  SDHCI_RESET_DATA       0x04
 118
 119 #define SDHCI_INT_STATUS        0x30
 120 #define SDHCI_INT_ENABLE        0x34
 121 #define SDHCI_SIGNAL_ENABLE     0x38
 122 #define  SDHCI_INT_RESPONSE     0x00000001
 123 #define  SDHCI_INT_DATA_END     0x00000002
 124 #define  SDHCI_INT_BLK_GAP      0x00000004
 125 #define  SDHCI_INT_DMA_END      0x00000008
 126 #define  SDHCI_INT_SPACE_AVAIL  0x00000010
 127 #define  SDHCI_INT_DATA_AVAIL   0x00000020
 128 #define  SDHCI_INT_CARD_INSERT  0x00000040
 129 #define  SDHCI_INT_CARD_REMOVE  0x00000080
 130 #define  SDHCI_INT_CARD_INT     0x00000100
 131 #define  SDHCI_INT_ERROR        0x00008000
 132 #define  SDHCI_INT_TIMEOUT      0x00010000
 133 #define  SDHCI_INT_CRC          0x00020000
 134 #define  SDHCI_INT_END_BIT      0x00040000
 135 #define  SDHCI_INT_INDEX        0x00080000
 136 #define  SDHCI_INT_DATA_TIMEOUT 0x00100000
 137 #define  SDHCI_INT_DATA_CRC     0x00200000
 138 #define  SDHCI_INT_DATA_END_BIT 0x00400000
 139 #define  SDHCI_INT_BUS_POWER    0x00800000
 140 #define  SDHCI_INT_ACMD12ERR    0x01000000
 141 #define  SDHCI_INT_ADMA_ERROR   0x02000000
 142
 143 #define  SDHCI_INT_NORMAL_MASK  0x00007FFF
 144 #define  SDHCI_INT_ERROR_MASK   0xFFFF8000
 145
 146 #define  SDHCI_INT_CMD_MASK     (SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \
 147                 SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
 148 #define  SDHCI_INT_DATA_MASK    (SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \
 149                 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \
 150                 SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \
 151                 SDHCI_INT_DATA_END_BIT | SDHCI_INT_ADMA_ERROR | \
 152                 SDHCI_INT_BLK_GAP)
 153 #define SDHCI_INT_ALL_MASK      ((unsigned int)-1)
 154
 155 #define SDHCI_ACMD12_ERR        0x3C
 156
 157 #define SDHCI_HOST_CONTROL2             0x3E
 158 #define  SDHCI_CTRL_UHS_MASK            0x0007
 159 #define   SDHCI_CTRL_UHS_SDR12          0x0000
 160 #define   SDHCI_CTRL_UHS_SDR25          0x0001
 161 #define   SDHCI_CTRL_UHS_SDR50          0x0002
 162 #define   SDHCI_CTRL_UHS_SDR104         0x0003
 163 #define   SDHCI_CTRL_UHS_DDR50          0x0004
 164 #define   SDHCI_CTRL_HS400              0x0005 /* Non-standard */
 165 #define  SDHCI_CTRL_VDD_180             0x0008
 166 #define  SDHCI_CTRL_DRV_TYPE_MASK       0x0030
 167 #define   SDHCI_CTRL_DRV_TYPE_B         0x0000
 168 #define   SDHCI_CTRL_DRV_TYPE_A         0x0010
 169 #define   SDHCI_CTRL_DRV_TYPE_C         0x0020
 170 #define   SDHCI_CTRL_DRV_TYPE_D         0x0030
 171 #define  SDHCI_CTRL_EXEC_TUNING         0x0040
 172 #define  SDHCI_CTRL_TUNED_CLK           0x0080
 173 #define  SDHCI_CTRL_PRESET_VAL_ENABLE   0x8000
 174
 175 #define SDHCI_CAPABILITIES      0x40
 176 #define  SDHCI_TIMEOUT_CLK_MASK 0x0000003F
 177 #define  SDHCI_TIMEOUT_CLK_SHIFT 0
 178 #define  SDHCI_TIMEOUT_CLK_UNIT 0x00000080
 179 #define  SDHCI_CLOCK_BASE_MASK  0x00003F00
 180 #define  SDHCI_CLOCK_V3_BASE_MASK       0x0000FF00
 181 #define  SDHCI_CLOCK_BASE_SHIFT 8
 182 #define  SDHCI_MAX_BLOCK_MASK   0x00030000
 183 #define  SDHCI_MAX_BLOCK_SHIFT  16
 184 #define  SDHCI_CAN_DO_8BIT      0x00040000
 185 #define  SDHCI_CAN_DO_ADMA2     0x00080000
 186 #define  SDHCI_CAN_DO_ADMA1     0x00100000
 187 #define  SDHCI_CAN_DO_HISPD     0x00200000
 188 #define  SDHCI_CAN_DO_SDMA      0x00400000
 189 #define  SDHCI_CAN_VDD_330      0x01000000
 190 #define  SDHCI_CAN_VDD_300      0x02000000
 191 #define  SDHCI_CAN_VDD_180      0x04000000
 192 #define  SDHCI_CAN_64BIT        0x10000000
 193
 194 #define  SDHCI_SUPPORT_SDR50    0x00000001
 195 #define  SDHCI_SUPPORT_SDR104   0x00000002
 196 #define  SDHCI_SUPPORT_DDR50    0x00000004
 197 #define  SDHCI_DRIVER_TYPE_A    0x00000010
 198 #define  SDHCI_DRIVER_TYPE_C    0x00000020
 199 #define  SDHCI_DRIVER_TYPE_D    0x00000040
 200 #define  SDHCI_RETUNING_TIMER_COUNT_MASK        0x00000F00
 201 #define  SDHCI_RETUNING_TIMER_COUNT_SHIFT       8
 202 #define  SDHCI_USE_SDR50_TUNING                 0x00002000
 203 #define  SDHCI_RETUNING_MODE_MASK               0x0000C000
 204 #define  SDHCI_RETUNING_MODE_SHIFT              14
 205 #define  SDHCI_CLOCK_MUL_MASK   0x00FF0000
 206 #define  SDHCI_CLOCK_MUL_SHIFT  16
 207 #define  SDHCI_SUPPORT_HS400    0x80000000 /* Non-standard */
 208
 209 #define SDHCI_CAPABILITIES_1    0x44
 210
 211 #define SDHCI_MAX_CURRENT               0x48
 212 #define  SDHCI_MAX_CURRENT_LIMIT        0xFF
 213 #define  SDHCI_MAX_CURRENT_330_MASK     0x0000FF
 214 #define  SDHCI_MAX_CURRENT_330_SHIFT    0
 215 #define  SDHCI_MAX_CURRENT_300_MASK     0x00FF00
 216 #define  SDHCI_MAX_CURRENT_300_SHIFT    8
 217 #define  SDHCI_MAX_CURRENT_180_MASK     0xFF0000
 218 #define  SDHCI_MAX_CURRENT_180_SHIFT    16
 219 #define   SDHCI_MAX_CURRENT_MULTIPLIER  4
 220
 221 /* 4C-4F reserved for more max current */
 222
 223 #define SDHCI_SET_ACMD12_ERROR  0x50
 224 #define SDHCI_SET_INT_ERROR     0x52
 225
 226 #define SDHCI_ADMA_ERROR        0x54
 227
 228 /* 55-57 reserved */
 229
 230 #define SDHCI_ADMA_ADDRESS      0x58
 231 #define SDHCI_ADMA_ADDRESS_HI   0x5C
 232
 233 /* 60-FB reserved */
 234
 235 #define SDHCI_PRESET_FOR_SDR12 0x66
 236 #define SDHCI_PRESET_FOR_SDR25 0x68
 237 #define SDHCI_PRESET_FOR_SDR50 0x6A
 238 #define SDHCI_PRESET_FOR_SDR104        0x6C
 239 #define SDHCI_PRESET_FOR_DDR50 0x6E
 240 #define SDHCI_PRESET_FOR_HS400 0x74 /* Non-standard */
 241 #define SDHCI_PRESET_DRV_MASK  0xC000
 242 #define SDHCI_PRESET_DRV_SHIFT  14
 243 #define SDHCI_PRESET_CLKGEN_SEL_MASK   0x400
 244 #define SDHCI_PRESET_CLKGEN_SEL_SHIFT   10
 245 #define SDHCI_PRESET_SDCLK_FREQ_MASK   0x3FF
 246 #define SDHCI_PRESET_SDCLK_FREQ_SHIFT   0
 247
 248 #define SDHCI_SLOT_INT_STATUS   0xFC
 249
 250 #define SDHCI_HOST_VERSION      0xFE
 251 #define  SDHCI_VENDOR_VER_MASK  0xFF00
 252 #define  SDHCI_VENDOR_VER_SHIFT 8
 253 #define  SDHCI_SPEC_VER_MASK    0x00FF
 254 #define  SDHCI_SPEC_VER_SHIFT   0
 255 #define   SDHCI_SPEC_100        0
 256 #define   SDHCI_SPEC_200        1
 257 #define   SDHCI_SPEC_300        2
 258
 259 /*
 260  * End of controller registers.
 261  */
 262
 263 #define SDHCI_MAX_DIV_SPEC_200  256
 264 #define SDHCI_MAX_DIV_SPEC_300  2046
 265
 266 /*
 267  * Host SDMA buffer boundary. Valid values from 4K to 512K in powers of 2.
 268  */
 269 #define SDHCI_DEFAULT_BOUNDARY_SIZE  (512 * 1024)
 270 #define SDHCI_DEFAULT_BOUNDARY_ARG   (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12)
 271
 272 /* ADMA2 32-bit DMA descriptor size */
 273 #define SDHCI_ADMA2_32_DESC_SZ  8
 274
 275 /* ADMA2 32-bit DMA alignment */
 276 #define SDHCI_ADMA2_32_ALIGN    4
 277
 278 /* ADMA2 32-bit descriptor */
 279 struct sdhci_adma2_32_desc {
 280         __le16  cmd;
 281         __le16  len;
 282         __le32  addr;
 283 }  __packed __aligned(SDHCI_ADMA2_32_ALIGN);
 284
 285 /* ADMA2 64-bit DMA descriptor size */
 286 #define SDHCI_ADMA2_64_DESC_SZ  12
 287
 288 /* ADMA2 64-bit DMA alignment */
 289 #define SDHCI_ADMA2_64_ALIGN    8
 290
 291 /*
 292  * ADMA2 64-bit descriptor. Note 12-byte descriptor can't always be 8-byte
 293  * aligned.
 294  */
 295 struct sdhci_adma2_64_desc {
 296         __le16  cmd;
 297         __le16  len;
 298         __le32  addr_lo;
 299         __le32  addr_hi;
 300 }  __packed __aligned(4);
 301
 302 #define ADMA2_TRAN_VALID        0x21
 303 #define ADMA2_NOP_END_VALID     0x3
 304 #define ADMA2_END               0x2
 305
 306 /*
 307  * Maximum segments assuming a 512KiB maximum requisition size and a minimum
 308  * 4KiB page size.
 309  */
 310 #define SDHCI_MAX_SEGS          128
 311
 312 enum sdhci_cookie {
 313         COOKIE_UNMAPPED,
 314         COOKIE_MAPPED,
 315         COOKIE_GIVEN,
 316 };
 317
 318 struct sdhci_host {
 319         /* Data set by hardware interface driver */
 320         const char *hw_name;    /* Hardware bus name */
 321
 322         unsigned int quirks;    /* Deviations from spec. */
 323
 324 /* Controller doesn't honor resets unless we touch the clock register */
 325 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET                  (1<<0)
 326 /* Controller has bad caps bits, but really supports DMA */
 327 #define SDHCI_QUIRK_FORCE_DMA                           (1<<1)
 328 /* Controller doesn't like to be reset when there is no card inserted. */
 329 #define SDHCI_QUIRK_NO_CARD_NO_RESET                    (1<<2)
 330 /* Controller doesn't like clearing the power reg before a change */
 331 #define SDHCI_QUIRK_SINGLE_POWER_WRITE                  (1<<3)
 332 /* Controller has flaky internal state so reset it on each ios change */
 333 #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS               (1<<4)
 334 /* Controller has an unusable DMA engine */
 335 #define SDHCI_QUIRK_BROKEN_DMA                          (1<<5)
 336 /* Controller has an unusable ADMA engine */
 337 #define SDHCI_QUIRK_BROKEN_ADMA                         (1<<6)
 338 /* Controller can only DMA from 32-bit aligned addresses */
 339 #define SDHCI_QUIRK_32BIT_DMA_ADDR                      (1<<7)
 340 /* Controller can only DMA chunk sizes that are a multiple of 32 bits */
 341 #define SDHCI_QUIRK_32BIT_DMA_SIZE                      (1<<8)
 342 /* Controller can only ADMA chunks that are a multiple of 32 bits */
 343 #define SDHCI_QUIRK_32BIT_ADMA_SIZE                     (1<<9)
 344 /* Controller needs to be reset after each request to stay stable */
 345 #define SDHCI_QUIRK_RESET_AFTER_REQUEST                 (1<<10)
 346 /* Controller needs voltage and power writes to happen separately */
 347 #define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER             (1<<11)
 348 /* Controller provides an incorrect timeout value for transfers */
 349 #define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL                  (1<<12)
 350 /* Controller has an issue with buffer bits for small transfers */
 351 #define SDHCI_QUIRK_BROKEN_SMALL_PIO                    (1<<13)
 352 /* Controller does not provide transfer-complete interrupt when not busy */
 353 #define SDHCI_QUIRK_NO_BUSY_IRQ                         (1<<14)
 354 /* Controller has unreliable card detection */
 355 #define SDHCI_QUIRK_BROKEN_CARD_DETECTION               (1<<15)
 356 /* Controller reports inverted write-protect state */
 357 #define SDHCI_QUIRK_INVERTED_WRITE_PROTECT              (1<<16)
 358 /* Controller does not like fast PIO transfers */
 359 #define SDHCI_QUIRK_PIO_NEEDS_DELAY                     (1<<18)
 360 /* Controller has to be forced to use block size of 2048 bytes */
 361 #define SDHCI_QUIRK_FORCE_BLK_SZ_2048                   (1<<20)
 362 /* Controller cannot do multi-block transfers */
 363 #define SDHCI_QUIRK_NO_MULTIBLOCK                       (1<<21)
 364 /* Controller can only handle 1-bit data transfers */
 365 #define SDHCI_QUIRK_FORCE_1_BIT_DATA                    (1<<22)
 366 /* Controller needs 10ms delay between applying power and clock */
 367 #define SDHCI_QUIRK_DELAY_AFTER_POWER                   (1<<23)
 368 /* Controller uses SDCLK instead of TMCLK for data timeouts */
 369 #define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK             (1<<24)
 370 /* Controller reports wrong base clock capability */
 371 #define SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN               (1<<25)
 372 /* Controller cannot support End Attribute in NOP ADMA descriptor */
 373 #define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC               (1<<26)
 374 /* Controller is missing device caps. Use caps provided by host */
 375 #define SDHCI_QUIRK_MISSING_CAPS                        (1<<27)
 376 /* Controller uses Auto CMD12 command to stop the transfer */
 377 #define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12              (1<<28)
 378 /* Controller doesn't have HISPD bit field in HI-SPEED SD card */
 379 #define SDHCI_QUIRK_NO_HISPD_BIT                        (1<<29)
 380 /* Controller treats ADMA descriptors with length 0000h incorrectly */
 381 #define SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC            (1<<30)
 382 /* The read-only detection via SDHCI_PRESENT_STATE register is unstable */
 383 #define SDHCI_QUIRK_UNSTABLE_RO_DETECT                  (1<<31)
 384
 385         unsigned int quirks2;   /* More deviations from spec. */
 386
 387 #define SDHCI_QUIRK2_HOST_OFF_CARD_ON                   (1<<0)
 388 #define SDHCI_QUIRK2_HOST_NO_CMD23                      (1<<1)
 389 /* The system physically doesn't support 1.8v, even if the host does */
 390 #define SDHCI_QUIRK2_NO_1_8_V                           (1<<2)
 391 #define SDHCI_QUIRK2_PRESET_VALUE_BROKEN                (1<<3)
 392 #define SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON               (1<<4)
 393 /* Controller has a non-standard host control register */
 394 #define SDHCI_QUIRK2_BROKEN_HOST_CONTROL                (1<<5)
 395 /* Controller does not support HS200 */
 396 #define SDHCI_QUIRK2_BROKEN_HS200                       (1<<6)
 397 /* Controller does not support DDR50 */
 398 #define SDHCI_QUIRK2_BROKEN_DDR50                       (1<<7)
 399 /* Stop command (CMD12) can set Transfer Complete when not using MMC_RSP_BUSY */
 400 #define SDHCI_QUIRK2_STOP_WITH_TC                       (1<<8)
 401 /* Controller does not support 64-bit DMA */
 402 #define SDHCI_QUIRK2_BROKEN_64_BIT_DMA                  (1<<9)
 403 /* need clear transfer mode register before send cmd */
 404 #define SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD  (1<<10)
 405 /* Capability register bit-63 indicates HS400 support */
 406 #define SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400               (1<<11)
 407 /* forced tuned clock */
 408 #define SDHCI_QUIRK2_TUNING_WORK_AROUND                 (1<<12)
 409 /* disable the block count for single block transactions */
 410 #define SDHCI_QUIRK2_SUPPORT_SINGLE                     (1<<13)
 411 /* Controller broken with using ACMD23 */
 412 #define SDHCI_QUIRK2_ACMD23_BROKEN                      (1<<14)
 413 /* Broken Clock divider zero in controller */
 414 #define SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN              (1<<15)
 415 /*
 416  * When internal clock is disabled, a delay is needed before modifying the
 417  * SD clock frequency or enabling back the internal clock.
 418  */
 419 #define SDHCI_QUIRK2_NEED_DELAY_AFTER_INT_CLK_RST       (1<<16)
 420
 421         int irq;                /* Device IRQ */
 422         void __iomem *ioaddr;   /* Mapped address */
 423
 424         const struct sdhci_ops *ops;    /* Low level hw interface */
 425
 426         /* Internal data */
 427         struct mmc_host *mmc;   /* MMC structure */
 428         u64 dma_mask;           /* custom DMA mask */
 429
 430 #if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
 431         struct led_classdev led;        /* LED control */
 432         char led_name[32];
 433 #endif
 434
 435         spinlock_t lock;        /* Mutex */
 436
 437         int flags;              /* Host attributes */
 438 #define SDHCI_USE_SDMA          (1<<0)  /* Host is SDMA capable */
 439 #define SDHCI_USE_ADMA          (1<<1)  /* Host is ADMA capable */
 440 #define SDHCI_REQ_USE_DMA       (1<<2)  /* Use DMA for this req. */
 441 #define SDHCI_DEVICE_DEAD       (1<<3)  /* Device unresponsive */
 442 #define SDHCI_SDR50_NEEDS_TUNING (1<<4) /* SDR50 needs tuning */
 443 #define SDHCI_AUTO_CMD12        (1<<6)  /* Auto CMD12 support */
 444 #define SDHCI_AUTO_CMD23        (1<<7)  /* Auto CMD23 support */
 445 #define SDHCI_PV_ENABLED        (1<<8)  /* Preset value enabled */
 446 #define SDHCI_SDIO_IRQ_ENABLED  (1<<9)  /* SDIO irq enabled */
 447 #define SDHCI_SDR104_NEEDS_TUNING (1<<10)       /* SDR104/HS200 needs tuning */
 448 #define SDHCI_USE_64_BIT_DMA    (1<<12) /* Use 64-bit DMA */
 449 #define SDHCI_HS400_TUNING      (1<<13) /* Tuning for HS400 */
 450
 451         unsigned int version;   /* SDHCI spec. version */
 452
 453         unsigned int max_clk;   /* Max possible freq (MHz) */
 454         unsigned int timeout_clk;       /* Timeout freq (KHz) */
 455         unsigned int clk_mul;   /* Clock Muliplier value */
 456
 457         unsigned int clock;     /* Current clock (MHz) */
 458         u8 pwr;                 /* Current voltage */
 459
 460         bool runtime_suspended; /* Host is runtime suspended */
 461         bool bus_on;            /* Bus power prevents runtime suspend */
 462         bool preset_enabled;    /* Preset is enabled */
 463
 464         struct mmc_request *mrq;        /* Current request */
 465         struct mmc_command *cmd;        /* Current command */
 466         struct mmc_data *data;  /* Current data request */
 467         unsigned int data_early:1;      /* Data finished before cmd */
 468         unsigned int busy_handle:1;     /* Handling the order of Busy-end */
 469
 470         struct sg_mapping_iter sg_miter;        /* SG state for PIO */
 471         unsigned int blocks;    /* remaining PIO blocks */
 472
 473         int sg_count;           /* Mapped sg entries */
 474
 475         void *adma_table;       /* ADMA descriptor table */
 476         void *align_buffer;     /* Bounce buffer */
 477
 478         size_t adma_table_sz;   /* ADMA descriptor table size */
 479         size_t align_buffer_sz; /* Bounce buffer size */
 480
 481         dma_addr_t adma_addr;   /* Mapped ADMA descr. table */
 482         dma_addr_t align_addr;  /* Mapped bounce buffer */
 483
 484         unsigned int desc_sz;   /* ADMA descriptor size */
 485         unsigned int align_sz;  /* ADMA alignment */
 486         unsigned int align_mask;        /* ADMA alignment mask */
 487
 488         struct tasklet_struct finish_tasklet;   /* Tasklet structures */
 489
 490         struct timer_list timer;        /* Timer for timeouts */
 491
 492         u32 caps;               /* Alternative CAPABILITY_0 */
 493         u32 caps1;              /* Alternative CAPABILITY_1 */
 494
 495         unsigned int            ocr_avail_sdio; /* OCR bit masks */
 496         unsigned int            ocr_avail_sd;
 497         unsigned int            ocr_avail_mmc;
 498         u32 ocr_mask;           /* available voltages */
 499
 500         unsigned                timing;         /* Current timing */
 501
 502         u32                     thread_isr;
 503
 504         /* cached registers */
 505         u32                     ier;
 506
 507         wait_queue_head_t       buf_ready_int;  /* Waitqueue for Buffer Read Ready interrupt */
 508         unsigned int            tuning_done;    /* Condition flag set when CMD19 succeeds */
 509
 510         unsigned int            tuning_count;   /* Timer count for re-tuning */
 511         unsigned int            tuning_mode;    /* Re-tuning mode supported by host */
 512 #define SDHCI_TUNING_MODE_1     0
 513
 514         unsigned long private[0] ____cacheline_aligned;
 515 };
 516
 517 struct sdhci_ops {
 518 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
 519         u32             (*read_l)(struct sdhci_host *host, int reg);
 520         u16             (*read_w)(struct sdhci_host *host, int reg);
 521         u8              (*read_b)(struct sdhci_host *host, int reg);
 522         void            (*write_l)(struct sdhci_host *host, u32 val, int reg);
 523         void            (*write_w)(struct sdhci_host *host, u16 val, int reg);
 524         void            (*write_b)(struct sdhci_host *host, u8 val, int reg);
 525 #endif
 526
 527         void    (*set_clock)(struct sdhci_host *host, unsigned int clock);
 528
 529         int             (*enable_dma)(struct sdhci_host *host);
 530         unsigned int    (*get_max_clock)(struct sdhci_host *host);
 531         unsigned int    (*get_min_clock)(struct sdhci_host *host);
 532         unsigned int    (*get_timeout_clock)(struct sdhci_host *host);
 533         unsigned int    (*get_max_timeout_count)(struct sdhci_host *host);
 534         void            (*set_timeout)(struct sdhci_host *host,
 535                                        struct mmc_command *cmd);
 536         void            (*set_bus_width)(struct sdhci_host *host, int width);
 537         void (*platform_send_init_74_clocks)(struct sdhci_host *host,
 538                                              u8 power_mode);
 539         unsigned int    (*get_ro)(struct sdhci_host *host);
 540         void            (*reset)(struct sdhci_host *host, u8 mask);
 541         int     (*platform_execute_tuning)(struct sdhci_host *host, u32 opcode);
 542         void    (*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
 543         void    (*hw_reset)(struct sdhci_host *host);
 544         void    (*adma_workaround)(struct sdhci_host *host, u32 intmask);
 545         void    (*platform_init)(struct sdhci_host *host);
 546         void    (*card_event)(struct sdhci_host *host);
 547         void    (*voltage_switch)(struct sdhci_host *host);
 548         int     (*select_drive_strength)(struct sdhci_host *host,
 549                                          struct mmc_card *card,
 550                                          unsigned int max_dtr, int host_drv,
 551                                          int card_drv, int *drv_type);
 552 };
 553
 554 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
 555
 556 static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
 557 {
 558         if (unlikely(host->ops->write_l))
 559                 host->ops->write_l(host, val, reg);
 560         else
 561                 writel(val, host->ioaddr + reg);
 562 }
 563
 564 static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
 565 {
 566         if (unlikely(host->ops->write_w))
 567                 host->ops->write_w(host, val, reg);
 568         else
 569                 writew(val, host->ioaddr + reg);
 570 }
 571
 572 static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
 573 {
 574         if (unlikely(host->ops->write_b))
 575                 host->ops->write_b(host, val, reg);
 576         else
 577                 writeb(val, host->ioaddr + reg);
 578 }
 579
 580 static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
 581 {
 582         if (unlikely(host->ops->read_l))
 583                 return host->ops->read_l(host, reg);
 584         else
 585                 return readl(host->ioaddr + reg);
 586 }
 587
 588 static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
 589 {
 590         if (unlikely(host->ops->read_w))
 591                 return host->ops->read_w(host, reg);
 592         else
 593                 return readw(host->ioaddr + reg);
 594 }
 595
 596 static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
 597 {
 598         if (unlikely(host->ops->read_b))
 599                 return host->ops->read_b(host, reg);
 600         else
 601                 return readb(host->ioaddr + reg);
 602 }
 603
 604 #else
 605
 606 static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
 607 {
 608         writel(val, host->ioaddr + reg);
 609 }
 610
 611 static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
 612 {
 613         writew(val, host->ioaddr + reg);
 614 }
 615
 616 static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
 617 {
 618         writeb(val, host->ioaddr + reg);
 619 }
 620
 621 static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
 622 {
 623         return readl(host->ioaddr + reg);
 624 }
 625
 626 static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
 627 {
 628         return readw(host->ioaddr + reg);
 629 }
 630
 631 static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
 632 {
 633         return readb(host->ioaddr + reg);
 634 }
 635
 636 #endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */
 637
 638 extern struct sdhci_host *sdhci_alloc_host(struct device *dev,
 639         size_t priv_size);
 640 extern void sdhci_free_host(struct sdhci_host *host);
 641
 642 static inline void *sdhci_priv(struct sdhci_host *host)
 643 {
 644         return (void *)host->private;
 645 }
 646
 647 extern void sdhci_card_detect(struct sdhci_host *host);
 648 extern int sdhci_add_host(struct sdhci_host *host);
 649 extern void sdhci_remove_host(struct sdhci_host *host, int dead);
 650 extern void sdhci_send_command(struct sdhci_host *host,
 651                                 struct mmc_command *cmd);
 652
 653 static inline bool sdhci_sdio_irq_enabled(struct sdhci_host *host)
 654 {
 655         return !!(host->flags & SDHCI_SDIO_IRQ_ENABLED);
 656 }
 657
 658 void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);
 659 void sdhci_set_bus_width(struct sdhci_host *host, int width);
 660 void sdhci_reset(struct sdhci_host *host, u8 mask);
 661 void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing);
 662
 663 #ifdef CONFIG_PM
 664 extern int sdhci_suspend_host(struct sdhci_host *host);
 665 extern int sdhci_resume_host(struct sdhci_host *host);
 666 extern void sdhci_enable_irq_wakeups(struct sdhci_host *host);
 667 extern int sdhci_runtime_suspend_host(struct sdhci_host *host);
 668 extern int sdhci_runtime_resume_host(struct sdhci_host *host);
 669 #endif
 670
 671 #endif /* __SDHCI_HW_H */