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 #include <linux/leds.h>
  21 #include <linux/interrupt.h>
  22
  23 #include <linux/mmc/host.h>
  24
  25 /*
  26  * Controller registers
  27  */
  28
  29 #define SDHCI_DMA_ADDRESS       0x00
  30 #define SDHCI_ARGUMENT2         SDHCI_DMA_ADDRESS
  31 #define SDHCI_32BIT_BLK_CNT     SDHCI_DMA_ADDRESS
  32
  33 #define SDHCI_BLOCK_SIZE        0x04
  34 #define  SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))
  35
  36 #define SDHCI_BLOCK_COUNT       0x06
  37
  38 #define SDHCI_ARGUMENT          0x08
  39
  40 #define SDHCI_TRANSFER_MODE     0x0C
  41 #define  SDHCI_TRNS_DMA         0x01
  42 #define  SDHCI_TRNS_BLK_CNT_EN  0x02
  43 #define  SDHCI_TRNS_AUTO_CMD12  0x04
  44 #define  SDHCI_TRNS_AUTO_CMD23  0x08
  45 #define  SDHCI_TRNS_AUTO_SEL    0x0C
  46 #define  SDHCI_TRNS_READ        0x10
  47 #define  SDHCI_TRNS_MULTI       0x20
  48
  49 #define SDHCI_COMMAND           0x0E
  50 #define  SDHCI_CMD_RESP_MASK    0x03
  51 #define  SDHCI_CMD_CRC          0x08
  52 #define  SDHCI_CMD_INDEX        0x10
  53 #define  SDHCI_CMD_DATA         0x20
  54 #define  SDHCI_CMD_ABORTCMD     0xC0
  55
  56 #define  SDHCI_CMD_RESP_NONE    0x00
  57 #define  SDHCI_CMD_RESP_LONG    0x01
  58 #define  SDHCI_CMD_RESP_SHORT   0x02
  59 #define  SDHCI_CMD_RESP_SHORT_BUSY 0x03
  60
  61 #define SDHCI_MAKE_CMD(c, f) (((c & 0xff) << 8) | (f & 0xff))
  62 #define SDHCI_GET_CMD(c) ((c>>8) & 0x3f)
  63
  64 #define SDHCI_RESPONSE          0x10
  65
  66 #define SDHCI_BUFFER            0x20
  67
  68 #define SDHCI_PRESENT_STATE     0x24
  69 #define  SDHCI_CMD_INHIBIT      0x00000001
  70 #define  SDHCI_DATA_INHIBIT     0x00000002
  71 #define  SDHCI_DOING_WRITE      0x00000100
  72 #define  SDHCI_DOING_READ       0x00000200
  73 #define  SDHCI_SPACE_AVAILABLE  0x00000400
  74 #define  SDHCI_DATA_AVAILABLE   0x00000800
  75 #define  SDHCI_CARD_PRESENT     0x00010000
  76 #define  SDHCI_WRITE_PROTECT    0x00080000
  77 #define  SDHCI_DATA_LVL_MASK    0x00F00000
  78 #define   SDHCI_DATA_LVL_SHIFT  20
  79 #define   SDHCI_DATA_0_LVL_MASK 0x00100000
  80 #define  SDHCI_CMD_LVL          0x01000000
  81
  82 #define SDHCI_HOST_CONTROL      0x28
  83 #define  SDHCI_CTRL_LED         0x01
  84 #define  SDHCI_CTRL_4BITBUS     0x02
  85 #define  SDHCI_CTRL_HISPD       0x04
  86 #define  SDHCI_CTRL_DMA_MASK    0x18
  87 #define   SDHCI_CTRL_SDMA       0x00
  88 #define   SDHCI_CTRL_ADMA1      0x08
  89 #define   SDHCI_CTRL_ADMA32     0x10
  90 #define   SDHCI_CTRL_ADMA64     0x18
  91 #define   SDHCI_CTRL_8BITBUS    0x20
  92 #define  SDHCI_CTRL_CDTEST_INS  0x40
  93 #define  SDHCI_CTRL_CDTEST_EN   0x80
  94
  95 #define SDHCI_POWER_CONTROL     0x29
  96 #define  SDHCI_POWER_ON         0x01
  97 #define  SDHCI_POWER_180        0x0A
  98 #define  SDHCI_POWER_300        0x0C
  99 #define  SDHCI_POWER_330        0x0E
 100
 101 #define SDHCI_BLOCK_GAP_CONTROL 0x2A
 102
 103 #define SDHCI_WAKE_UP_CONTROL   0x2B
 104 #define  SDHCI_WAKE_ON_INT      0x01
 105 #define  SDHCI_WAKE_ON_INSERT   0x02
 106 #define  SDHCI_WAKE_ON_REMOVE   0x04
 107
 108 #define SDHCI_CLOCK_CONTROL     0x2C
 109 #define  SDHCI_DIVIDER_SHIFT    8
 110 #define  SDHCI_DIVIDER_HI_SHIFT 6
 111 #define  SDHCI_DIV_MASK 0xFF
 112 #define  SDHCI_DIV_MASK_LEN     8
 113 #define  SDHCI_DIV_HI_MASK      0x300
 114 #define  SDHCI_PROG_CLOCK_MODE  0x0020
 115 #define  SDHCI_CLOCK_CARD_EN    0x0004
 116 #define  SDHCI_CLOCK_INT_STABLE 0x0002
 117 #define  SDHCI_CLOCK_INT_EN     0x0001
 118
 119 #define SDHCI_TIMEOUT_CONTROL   0x2E
 120
 121 #define SDHCI_SOFTWARE_RESET    0x2F
 122 #define  SDHCI_RESET_ALL        0x01
 123 #define  SDHCI_RESET_CMD        0x02
 124 #define  SDHCI_RESET_DATA       0x04
 125
 126 #define SDHCI_INT_STATUS        0x30
 127 #define SDHCI_INT_ENABLE        0x34
 128 #define SDHCI_SIGNAL_ENABLE     0x38
 129 #define  SDHCI_INT_RESPONSE     0x00000001
 130 #define  SDHCI_INT_DATA_END     0x00000002
 131 #define  SDHCI_INT_BLK_GAP      0x00000004
 132 #define  SDHCI_INT_DMA_END      0x00000008
 133 #define  SDHCI_INT_SPACE_AVAIL  0x00000010
 134 #define  SDHCI_INT_DATA_AVAIL   0x00000020
 135 #define  SDHCI_INT_CARD_INSERT  0x00000040
 136 #define  SDHCI_INT_CARD_REMOVE  0x00000080
 137 #define  SDHCI_INT_CARD_INT     0x00000100
 138 #define  SDHCI_INT_RETUNE       0x00001000
 139 #define  SDHCI_INT_CQE          0x00004000
 140 #define  SDHCI_INT_ERROR        0x00008000
 141 #define  SDHCI_INT_TIMEOUT      0x00010000
 142 #define  SDHCI_INT_CRC          0x00020000
 143 #define  SDHCI_INT_END_BIT      0x00040000
 144 #define  SDHCI_INT_INDEX        0x00080000
 145 #define  SDHCI_INT_DATA_TIMEOUT 0x00100000
 146 #define  SDHCI_INT_DATA_CRC     0x00200000
 147 #define  SDHCI_INT_DATA_END_BIT 0x00400000
 148 #define  SDHCI_INT_BUS_POWER    0x00800000
 149 #define  SDHCI_INT_ACMD12ERR    0x01000000
 150 #define  SDHCI_INT_ADMA_ERROR   0x02000000
 151
 152 #define  SDHCI_INT_NORMAL_MASK  0x00007FFF
 153 #define  SDHCI_INT_ERROR_MASK   0xFFFF8000
 154
 155 #define  SDHCI_INT_CMD_MASK     (SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \
 156                 SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
 157 #define  SDHCI_INT_DATA_MASK    (SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \
 158                 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \
 159                 SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \
 160                 SDHCI_INT_DATA_END_BIT | SDHCI_INT_ADMA_ERROR | \
 161                 SDHCI_INT_BLK_GAP)
 162 #define SDHCI_INT_ALL_MASK      ((unsigned int)-1)
 163
 164 #define SDHCI_CQE_INT_ERR_MASK ( \
 165         SDHCI_INT_ADMA_ERROR | SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT | \
 166         SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX | \
 167         SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT)
 168
 169 #define SDHCI_CQE_INT_MASK (SDHCI_CQE_INT_ERR_MASK | SDHCI_INT_CQE)
 170
 171 #define SDHCI_ACMD12_ERR        0x3C
 172
 173 #define SDHCI_HOST_CONTROL2             0x3E
 174 #define  SDHCI_CTRL_UHS_MASK            0x0007
 175 #define   SDHCI_CTRL_UHS_SDR12          0x0000
 176 #define   SDHCI_CTRL_UHS_SDR25          0x0001
 177 #define   SDHCI_CTRL_UHS_SDR50          0x0002
 178 #define   SDHCI_CTRL_UHS_SDR104         0x0003
 179 #define   SDHCI_CTRL_UHS_DDR50          0x0004
 180 #define   SDHCI_CTRL_HS400              0x0005 /* Non-standard */
 181 #define  SDHCI_CTRL_VDD_180             0x0008
 182 #define  SDHCI_CTRL_DRV_TYPE_MASK       0x0030
 183 #define   SDHCI_CTRL_DRV_TYPE_B         0x0000
 184 #define   SDHCI_CTRL_DRV_TYPE_A         0x0010
 185 #define   SDHCI_CTRL_DRV_TYPE_C         0x0020
 186 #define   SDHCI_CTRL_DRV_TYPE_D         0x0030
 187 #define  SDHCI_CTRL_EXEC_TUNING         0x0040
 188 #define  SDHCI_CTRL_TUNED_CLK           0x0080
 189 #define  SDHCI_CMD23_ENABLE             0x0800
 190 #define  SDHCI_CTRL_V4_MODE             0x1000
 191 #define  SDHCI_CTRL_64BIT_ADDR          0x2000
 192 #define  SDHCI_CTRL_PRESET_VAL_ENABLE   0x8000
 193
 194 #define SDHCI_CAPABILITIES      0x40
 195 #define  SDHCI_TIMEOUT_CLK_MASK 0x0000003F
 196 #define  SDHCI_TIMEOUT_CLK_SHIFT 0
 197 #define  SDHCI_TIMEOUT_CLK_UNIT 0x00000080
 198 #define  SDHCI_CLOCK_BASE_MASK  0x00003F00
 199 #define  SDHCI_CLOCK_V3_BASE_MASK       0x0000FF00
 200 #define  SDHCI_CLOCK_BASE_SHIFT 8
 201 #define  SDHCI_MAX_BLOCK_MASK   0x00030000
 202 #define  SDHCI_MAX_BLOCK_SHIFT  16
 203 #define  SDHCI_CAN_DO_8BIT      0x00040000
 204 #define  SDHCI_CAN_DO_ADMA2     0x00080000
 205 #define  SDHCI_CAN_DO_ADMA1     0x00100000
 206 #define  SDHCI_CAN_DO_HISPD     0x00200000
 207 #define  SDHCI_CAN_DO_SDMA      0x00400000
 208 #define  SDHCI_CAN_DO_SUSPEND   0x00800000
 209 #define  SDHCI_CAN_VDD_330      0x01000000
 210 #define  SDHCI_CAN_VDD_300      0x02000000
 211 #define  SDHCI_CAN_VDD_180      0x04000000
 212 #define  SDHCI_CAN_64BIT_V4     0x08000000
 213 #define  SDHCI_CAN_64BIT        0x10000000
 214
 215 #define  SDHCI_SUPPORT_SDR50    0x00000001
 216 #define  SDHCI_SUPPORT_SDR104   0x00000002
 217 #define  SDHCI_SUPPORT_DDR50    0x00000004
 218 #define  SDHCI_DRIVER_TYPE_A    0x00000010
 219 #define  SDHCI_DRIVER_TYPE_C    0x00000020
 220 #define  SDHCI_DRIVER_TYPE_D    0x00000040
 221 #define  SDHCI_RETUNING_TIMER_COUNT_MASK        0x00000F00
 222 #define  SDHCI_RETUNING_TIMER_COUNT_SHIFT       8
 223 #define  SDHCI_USE_SDR50_TUNING                 0x00002000
 224 #define  SDHCI_RETUNING_MODE_MASK               0x0000C000
 225 #define  SDHCI_RETUNING_MODE_SHIFT              14
 226 #define  SDHCI_CLOCK_MUL_MASK   0x00FF0000
 227 #define  SDHCI_CLOCK_MUL_SHIFT  16
 228 #define  SDHCI_SUPPORT_HS400    0x80000000 /* Non-standard */
 229
 230 #define SDHCI_CAPABILITIES_1    0x44
 231
 232 #define SDHCI_MAX_CURRENT               0x48
 233 #define  SDHCI_MAX_CURRENT_LIMIT        0xFF
 234 #define  SDHCI_MAX_CURRENT_330_MASK     0x0000FF
 235 #define  SDHCI_MAX_CURRENT_330_SHIFT    0
 236 #define  SDHCI_MAX_CURRENT_300_MASK     0x00FF00
 237 #define  SDHCI_MAX_CURRENT_300_SHIFT    8
 238 #define  SDHCI_MAX_CURRENT_180_MASK     0xFF0000
 239 #define  SDHCI_MAX_CURRENT_180_SHIFT    16
 240 #define   SDHCI_MAX_CURRENT_MULTIPLIER  4
 241
 242 /* 4C-4F reserved for more max current */
 243
 244 #define SDHCI_SET_ACMD12_ERROR  0x50
 245 #define SDHCI_SET_INT_ERROR     0x52
 246
 247 #define SDHCI_ADMA_ERROR        0x54
 248
 249 /* 55-57 reserved */
 250
 251 #define SDHCI_ADMA_ADDRESS      0x58
 252 #define SDHCI_ADMA_ADDRESS_HI   0x5C
 253
 254 /* 60-FB reserved */
 255
 256 #define SDHCI_PRESET_FOR_SDR12 0x66
 257 #define SDHCI_PRESET_FOR_SDR25 0x68
 258 #define SDHCI_PRESET_FOR_SDR50 0x6A
 259 #define SDHCI_PRESET_FOR_SDR104        0x6C
 260 #define SDHCI_PRESET_FOR_DDR50 0x6E
 261 #define SDHCI_PRESET_FOR_HS400 0x74 /* Non-standard */
 262 #define SDHCI_PRESET_DRV_MASK  0xC000
 263 #define SDHCI_PRESET_DRV_SHIFT  14
 264 #define SDHCI_PRESET_CLKGEN_SEL_MASK   0x400
 265 #define SDHCI_PRESET_CLKGEN_SEL_SHIFT   10
 266 #define SDHCI_PRESET_SDCLK_FREQ_MASK   0x3FF
 267 #define SDHCI_PRESET_SDCLK_FREQ_SHIFT   0
 268
 269 #define SDHCI_SLOT_INT_STATUS   0xFC
 270
 271 #define SDHCI_HOST_VERSION      0xFE
 272 #define  SDHCI_VENDOR_VER_MASK  0xFF00
 273 #define  SDHCI_VENDOR_VER_SHIFT 8
 274 #define  SDHCI_SPEC_VER_MASK    0x00FF
 275 #define  SDHCI_SPEC_VER_SHIFT   0
 276 #define   SDHCI_SPEC_100        0
 277 #define   SDHCI_SPEC_200        1
 278 #define   SDHCI_SPEC_300        2
 279 #define   SDHCI_SPEC_400        3
 280 #define   SDHCI_SPEC_410        4
 281 #define   SDHCI_SPEC_420        5
 282
 283 /*
 284  * End of controller registers.
 285  */
 286
 287 #define SDHCI_MAX_DIV_SPEC_200  256
 288 #define SDHCI_MAX_DIV_SPEC_300  2046
 289
 290 /*
 291  * Host SDMA buffer boundary. Valid values from 4K to 512K in powers of 2.
 292  */
 293 #define SDHCI_DEFAULT_BOUNDARY_SIZE  (512 * 1024)
 294 #define SDHCI_DEFAULT_BOUNDARY_ARG   (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12)
 295
 296 /* ADMA2 32-bit DMA descriptor size */
 297 #define SDHCI_ADMA2_32_DESC_SZ  8
 298
 299 /* ADMA2 32-bit descriptor */
 300 struct sdhci_adma2_32_desc {
 301         __le16  cmd;
 302         __le16  len;
 303         __le32  addr;
 304 }  __packed __aligned(4);
 305
 306 /* ADMA2 data alignment */
 307 #define SDHCI_ADMA2_ALIGN       4
 308 #define SDHCI_ADMA2_MASK        (SDHCI_ADMA2_ALIGN - 1)
 309
 310 /*
 311  * ADMA2 descriptor alignment.  Some controllers (e.g. Intel) require 8 byte
 312  * alignment for the descriptor table even in 32-bit DMA mode.  Memory
 313  * allocation is at least 8 byte aligned anyway, so just stipulate 8 always.
 314  */
 315 #define SDHCI_ADMA2_DESC_ALIGN  8
 316
 317 /*
 318  * ADMA2 64-bit DMA descriptor size
 319  * According to SD Host Controller spec v4.10, there are two kinds of
 320  * descriptors for 64-bit addressing mode: 96-bit Descriptor and 128-bit
 321  * Descriptor, if Host Version 4 Enable is set in the Host Control 2
 322  * register, 128-bit Descriptor will be selected.
 323  */
 324 #define SDHCI_ADMA2_64_DESC_SZ(host)    ((host)->v4_mode ? 16 : 12)
 325
 326 /*
 327  * ADMA2 64-bit descriptor. Note 12-byte descriptor can't always be 8-byte
 328  * aligned.
 329  */
 330 struct sdhci_adma2_64_desc {
 331         __le16  cmd;
 332         __le16  len;
 333         __le32  addr_lo;
 334         __le32  addr_hi;
 335 }  __packed __aligned(4);
 336
 337 #define ADMA2_TRAN_VALID        0x21
 338 #define ADMA2_NOP_END_VALID     0x3
 339 #define ADMA2_END               0x2
 340
 341 /*
 342  * Maximum segments assuming a 512KiB maximum requisition size and a minimum
 343  * 4KiB page size.
 344  */
 345 #define SDHCI_MAX_SEGS          128
 346
 347 /* Allow for a a command request and a data request at the same time */
 348 #define SDHCI_MAX_MRQS          2
 349
 350 /*
 351  * 48bit command and 136 bit response in 100KHz clock could take upto 2.48ms.
 352  * However since the start time of the command, the time between
 353  * command and response, and the time between response and start of data is
 354  * not known, set the command transfer time to 10ms.
 355  */
 356 #define MMC_CMD_TRANSFER_TIME   (10 * NSEC_PER_MSEC) /* max 10 ms */
 357
 358 enum sdhci_cookie {
 359         COOKIE_UNMAPPED,
 360         COOKIE_PRE_MAPPED,      /* mapped by sdhci_pre_req() */
 361         COOKIE_MAPPED,          /* mapped by sdhci_prepare_data() */
 362 };
 363
 364 struct sdhci_host {
 365         /* Data set by hardware interface driver */
 366         const char *hw_name;    /* Hardware bus name */
 367
 368         unsigned int quirks;    /* Deviations from spec. */
 369
 370 /* Controller doesn't honor resets unless we touch the clock register */
 371 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET                  (1<<0)
 372 /* Controller has bad caps bits, but really supports DMA */
 373 #define SDHCI_QUIRK_FORCE_DMA                           (1<<1)
 374 /* Controller doesn't like to be reset when there is no card inserted. */
 375 #define SDHCI_QUIRK_NO_CARD_NO_RESET                    (1<<2)
 376 /* Controller doesn't like clearing the power reg before a change */
 377 #define SDHCI_QUIRK_SINGLE_POWER_WRITE                  (1<<3)
 378 /* Controller has flaky internal state so reset it on each ios change */
 379 #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS               (1<<4)
 380 /* Controller has an unusable DMA engine */
 381 #define SDHCI_QUIRK_BROKEN_DMA                          (1<<5)
 382 /* Controller has an unusable ADMA engine */
 383 #define SDHCI_QUIRK_BROKEN_ADMA                         (1<<6)
 384 /* Controller can only DMA from 32-bit aligned addresses */
 385 #define SDHCI_QUIRK_32BIT_DMA_ADDR                      (1<<7)
 386 /* Controller can only DMA chunk sizes that are a multiple of 32 bits */
 387 #define SDHCI_QUIRK_32BIT_DMA_SIZE                      (1<<8)
 388 /* Controller can only ADMA chunks that are a multiple of 32 bits */
 389 #define SDHCI_QUIRK_32BIT_ADMA_SIZE                     (1<<9)
 390 /* Controller needs to be reset after each request to stay stable */
 391 #define SDHCI_QUIRK_RESET_AFTER_REQUEST                 (1<<10)
 392 /* Controller needs voltage and power writes to happen separately */
 393 #define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER             (1<<11)
 394 /* Controller provides an incorrect timeout value for transfers */
 395 #define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL                  (1<<12)
 396 /* Controller has an issue with buffer bits for small transfers */
 397 #define SDHCI_QUIRK_BROKEN_SMALL_PIO                    (1<<13)
 398 /* Controller does not provide transfer-complete interrupt when not busy */
 399 #define SDHCI_QUIRK_NO_BUSY_IRQ                         (1<<14)
 400 /* Controller has unreliable card detection */
 401 #define SDHCI_QUIRK_BROKEN_CARD_DETECTION               (1<<15)
 402 /* Controller reports inverted write-protect state */
 403 #define SDHCI_QUIRK_INVERTED_WRITE_PROTECT              (1<<16)
 404 /* Controller does not like fast PIO transfers */
 405 #define SDHCI_QUIRK_PIO_NEEDS_DELAY                     (1<<18)
 406 /* Controller has to be forced to use block size of 2048 bytes */
 407 #define SDHCI_QUIRK_FORCE_BLK_SZ_2048                   (1<<20)
 408 /* Controller cannot do multi-block transfers */
 409 #define SDHCI_QUIRK_NO_MULTIBLOCK                       (1<<21)
 410 /* Controller can only handle 1-bit data transfers */
 411 #define SDHCI_QUIRK_FORCE_1_BIT_DATA                    (1<<22)
 412 /* Controller needs 10ms delay between applying power and clock */
 413 #define SDHCI_QUIRK_DELAY_AFTER_POWER                   (1<<23)
 414 /* Controller uses SDCLK instead of TMCLK for data timeouts */
 415 #define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK             (1<<24)
 416 /* Controller reports wrong base clock capability */
 417 #define SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN               (1<<25)
 418 /* Controller cannot support End Attribute in NOP ADMA descriptor */
 419 #define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC               (1<<26)
 420 /* Controller is missing device caps. Use caps provided by host */
 421 #define SDHCI_QUIRK_MISSING_CAPS                        (1<<27)
 422 /* Controller uses Auto CMD12 command to stop the transfer */
 423 #define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12              (1<<28)
 424 /* Controller doesn't have HISPD bit field in HI-SPEED SD card */
 425 #define SDHCI_QUIRK_NO_HISPD_BIT                        (1<<29)
 426 /* Controller treats ADMA descriptors with length 0000h incorrectly */
 427 #define SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC            (1<<30)
 428 /* The read-only detection via SDHCI_PRESENT_STATE register is unstable */
 429 #define SDHCI_QUIRK_UNSTABLE_RO_DETECT                  (1<<31)
 430
 431         unsigned int quirks2;   /* More deviations from spec. */
 432
 433 #define SDHCI_QUIRK2_HOST_OFF_CARD_ON                   (1<<0)
 434 #define SDHCI_QUIRK2_HOST_NO_CMD23                      (1<<1)
 435 /* The system physically doesn't support 1.8v, even if the host does */
 436 #define SDHCI_QUIRK2_NO_1_8_V                           (1<<2)
 437 #define SDHCI_QUIRK2_PRESET_VALUE_BROKEN                (1<<3)
 438 #define SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON               (1<<4)
 439 /* Controller has a non-standard host control register */
 440 #define SDHCI_QUIRK2_BROKEN_HOST_CONTROL                (1<<5)
 441 /* Controller does not support HS200 */
 442 #define SDHCI_QUIRK2_BROKEN_HS200                       (1<<6)
 443 /* Controller does not support DDR50 */
 444 #define SDHCI_QUIRK2_BROKEN_DDR50                       (1<<7)
 445 /* Stop command (CMD12) can set Transfer Complete when not using MMC_RSP_BUSY */
 446 #define SDHCI_QUIRK2_STOP_WITH_TC                       (1<<8)
 447 /* Controller does not support 64-bit DMA */
 448 #define SDHCI_QUIRK2_BROKEN_64_BIT_DMA                  (1<<9)
 449 /* need clear transfer mode register before send cmd */
 450 #define SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD  (1<<10)
 451 /* Capability register bit-63 indicates HS400 support */
 452 #define SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400               (1<<11)
 453 /* forced tuned clock */
 454 #define SDHCI_QUIRK2_TUNING_WORK_AROUND                 (1<<12)
 455 /* disable the block count for single block transactions */
 456 #define SDHCI_QUIRK2_SUPPORT_SINGLE                     (1<<13)
 457 /* Controller broken with using ACMD23 */
 458 #define SDHCI_QUIRK2_ACMD23_BROKEN                      (1<<14)
 459 /* Broken Clock divider zero in controller */
 460 #define SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN              (1<<15)
 461 /* Controller has CRC in 136 bit Command Response */
 462 #define SDHCI_QUIRK2_RSP_136_HAS_CRC                    (1<<16)
 463 /*
 464  * Disable HW timeout if the requested timeout is more than the maximum
 465  * obtainable timeout.
 466  */
 467 #define SDHCI_QUIRK2_DISABLE_HW_TIMEOUT                 (1<<17)
 468 /*
 469  * 32-bit block count may not support eMMC where upper bits of CMD23 are used
 470  * for other purposes.  Consequently we support 16-bit block count by default.
 471  * Otherwise, SDHCI_QUIRK2_USE_32BIT_BLK_CNT can be selected to use 32-bit
 472  * block count.
 473  */
 474 #define SDHCI_QUIRK2_USE_32BIT_BLK_CNT                  (1<<18)
 475
 476         int irq;                /* Device IRQ */
 477         void __iomem *ioaddr;   /* Mapped address */
 478         char *bounce_buffer;    /* For packing SDMA reads/writes */
 479         dma_addr_t bounce_addr;
 480         unsigned int bounce_buffer_size;
 481
 482         const struct sdhci_ops *ops;    /* Low level hw interface */
 483
 484         /* Internal data */
 485         struct mmc_host *mmc;   /* MMC structure */
 486         struct mmc_host_ops mmc_host_ops;       /* MMC host ops */
 487         u64 dma_mask;           /* custom DMA mask */
 488
 489 #if IS_ENABLED(CONFIG_LEDS_CLASS)
 490         struct led_classdev led;        /* LED control */
 491         char led_name[32];
 492 #endif
 493
 494         spinlock_t lock;        /* Mutex */
 495
 496         int flags;              /* Host attributes */
 497 #define SDHCI_USE_SDMA          (1<<0)  /* Host is SDMA capable */
 498 #define SDHCI_USE_ADMA          (1<<1)  /* Host is ADMA capable */
 499 #define SDHCI_REQ_USE_DMA       (1<<2)  /* Use DMA for this req. */
 500 #define SDHCI_DEVICE_DEAD       (1<<3)  /* Device unresponsive */
 501 #define SDHCI_SDR50_NEEDS_TUNING (1<<4) /* SDR50 needs tuning */
 502 #define SDHCI_AUTO_CMD12        (1<<6)  /* Auto CMD12 support */
 503 #define SDHCI_AUTO_CMD23        (1<<7)  /* Auto CMD23 support */
 504 #define SDHCI_PV_ENABLED        (1<<8)  /* Preset value enabled */
 505 #define SDHCI_SDIO_IRQ_ENABLED  (1<<9)  /* SDIO irq enabled */
 506 #define SDHCI_USE_64_BIT_DMA    (1<<12) /* Use 64-bit DMA */
 507 #define SDHCI_HS400_TUNING      (1<<13) /* Tuning for HS400 */
 508 #define SDHCI_SIGNALING_330     (1<<14) /* Host is capable of 3.3V signaling */
 509 #define SDHCI_SIGNALING_180     (1<<15) /* Host is capable of 1.8V signaling */
 510 #define SDHCI_SIGNALING_120     (1<<16) /* Host is capable of 1.2V signaling */
 511
 512         unsigned int version;   /* SDHCI spec. version */
 513
 514         unsigned int max_clk;   /* Max possible freq (MHz) */
 515         unsigned int timeout_clk;       /* Timeout freq (KHz) */
 516         unsigned int clk_mul;   /* Clock Muliplier value */
 517
 518         unsigned int clock;     /* Current clock (MHz) */
 519         u8 pwr;                 /* Current voltage */
 520
 521         bool runtime_suspended; /* Host is runtime suspended */
 522         bool bus_on;            /* Bus power prevents runtime suspend */
 523         bool preset_enabled;    /* Preset is enabled */
 524         bool pending_reset;     /* Cmd/data reset is pending */
 525         bool irq_wake_enabled;  /* IRQ wakeup is enabled */
 526         bool v4_mode;           /* Host Version 4 Enable */
 527
 528         struct mmc_request *mrqs_done[SDHCI_MAX_MRQS];  /* Requests done */
 529         struct mmc_command *cmd;        /* Current command */
 530         struct mmc_command *data_cmd;   /* Current data command */
 531         struct mmc_data *data;  /* Current data request */
 532         unsigned int data_early:1;      /* Data finished before cmd */
 533
 534         struct sg_mapping_iter sg_miter;        /* SG state for PIO */
 535         unsigned int blocks;    /* remaining PIO blocks */
 536
 537         int sg_count;           /* Mapped sg entries */
 538
 539         void *adma_table;       /* ADMA descriptor table */
 540         void *align_buffer;     /* Bounce buffer */
 541
 542         size_t adma_table_sz;   /* ADMA descriptor table size */
 543         size_t align_buffer_sz; /* Bounce buffer size */
 544
 545         dma_addr_t adma_addr;   /* Mapped ADMA descr. table */
 546         dma_addr_t align_addr;  /* Mapped bounce buffer */
 547
 548         unsigned int desc_sz;   /* ADMA descriptor size */
 549
 550         struct tasklet_struct finish_tasklet;   /* Tasklet structures */
 551
 552         struct timer_list timer;        /* Timer for timeouts */
 553         struct timer_list data_timer;   /* Timer for data timeouts */
 554
 555         u32 caps;               /* CAPABILITY_0 */
 556         u32 caps1;              /* CAPABILITY_1 */
 557         bool read_caps;         /* Capability flags have been read */
 558
 559         unsigned int            ocr_avail_sdio; /* OCR bit masks */
 560         unsigned int            ocr_avail_sd;
 561         unsigned int            ocr_avail_mmc;
 562         u32 ocr_mask;           /* available voltages */
 563
 564         unsigned                timing;         /* Current timing */
 565
 566         u32                     thread_isr;
 567
 568         /* cached registers */
 569         u32                     ier;
 570
 571         bool                    cqe_on;         /* CQE is operating */
 572         u32                     cqe_ier;        /* CQE interrupt mask */
 573         u32                     cqe_err_ier;    /* CQE error interrupt mask */
 574
 575         wait_queue_head_t       buf_ready_int;  /* Waitqueue for Buffer Read Ready interrupt */
 576         unsigned int            tuning_done;    /* Condition flag set when CMD19 succeeds */
 577
 578         unsigned int            tuning_count;   /* Timer count for re-tuning */
 579         unsigned int            tuning_mode;    /* Re-tuning mode supported by host */
 580         unsigned int            tuning_err;     /* Error code for re-tuning */
 581 #define SDHCI_TUNING_MODE_1     0
 582 #define SDHCI_TUNING_MODE_2     1
 583 #define SDHCI_TUNING_MODE_3     2
 584         /* Delay (ms) between tuning commands */
 585         int                     tuning_delay;
 586
 587         /* Host SDMA buffer boundary. */
 588         u32                     sdma_boundary;
 589
 590         /* Host ADMA table count */
 591         u32                     adma_table_cnt;
 592
 593         u64                     data_timeout;
 594
 595         unsigned long private[0] ____cacheline_aligned;
 596 };
 597
 598 struct sdhci_ops {
 599 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
 600         u32             (*read_l)(struct sdhci_host *host, int reg);
 601         u16             (*read_w)(struct sdhci_host *host, int reg);
 602         u8              (*read_b)(struct sdhci_host *host, int reg);
 603         void            (*write_l)(struct sdhci_host *host, u32 val, int reg);
 604         void            (*write_w)(struct sdhci_host *host, u16 val, int reg);
 605         void            (*write_b)(struct sdhci_host *host, u8 val, int reg);
 606 #endif
 607
 608         void    (*set_clock)(struct sdhci_host *host, unsigned int clock);
 609         void    (*set_power)(struct sdhci_host *host, unsigned char mode,
 610                              unsigned short vdd);
 611
 612         u32             (*irq)(struct sdhci_host *host, u32 intmask);
 613
 614         int             (*enable_dma)(struct sdhci_host *host);
 615         unsigned int    (*get_max_clock)(struct sdhci_host *host);
 616         unsigned int    (*get_min_clock)(struct sdhci_host *host);
 617         /* get_timeout_clock should return clk rate in unit of Hz */
 618         unsigned int    (*get_timeout_clock)(struct sdhci_host *host);
 619         unsigned int    (*get_max_timeout_count)(struct sdhci_host *host);
 620         void            (*set_timeout)(struct sdhci_host *host,
 621                                        struct mmc_command *cmd);
 622         void            (*set_bus_width)(struct sdhci_host *host, int width);
 623         void (*platform_send_init_74_clocks)(struct sdhci_host *host,
 624                                              u8 power_mode);
 625         unsigned int    (*get_ro)(struct sdhci_host *host);
 626         void            (*reset)(struct sdhci_host *host, u8 mask);
 627         int     (*platform_execute_tuning)(struct sdhci_host *host, u32 opcode);
 628         void    (*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
 629         void    (*hw_reset)(struct sdhci_host *host);
 630         void    (*adma_workaround)(struct sdhci_host *host, u32 intmask);
 631         void    (*card_event)(struct sdhci_host *host);
 632         void    (*voltage_switch)(struct sdhci_host *host);
 633         void    (*adma_write_desc)(struct sdhci_host *host, void **desc,
 634                                    dma_addr_t addr, int len, unsigned int cmd);
 635 };
 636
 637 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
 638
 639 static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
 640 {
 641         if (unlikely(host->ops->write_l))
 642                 host->ops->write_l(host, val, reg);
 643         else
 644                 writel(val, host->ioaddr + reg);
 645 }
 646
 647 static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
 648 {
 649         if (unlikely(host->ops->write_w))
 650                 host->ops->write_w(host, val, reg);
 651         else
 652                 writew(val, host->ioaddr + reg);
 653 }
 654
 655 static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
 656 {
 657         if (unlikely(host->ops->write_b))
 658                 host->ops->write_b(host, val, reg);
 659         else
 660                 writeb(val, host->ioaddr + reg);
 661 }
 662
 663 static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
 664 {
 665         if (unlikely(host->ops->read_l))
 666                 return host->ops->read_l(host, reg);
 667         else
 668                 return readl(host->ioaddr + reg);
 669 }
 670
 671 static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
 672 {
 673         if (unlikely(host->ops->read_w))
 674                 return host->ops->read_w(host, reg);
 675         else
 676                 return readw(host->ioaddr + reg);
 677 }
 678
 679 static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
 680 {
 681         if (unlikely(host->ops->read_b))
 682                 return host->ops->read_b(host, reg);
 683         else
 684                 return readb(host->ioaddr + reg);
 685 }
 686
 687 #else
 688
 689 static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
 690 {
 691         writel(val, host->ioaddr + reg);
 692 }
 693
 694 static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
 695 {
 696         writew(val, host->ioaddr + reg);
 697 }
 698
 699 static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
 700 {
 701         writeb(val, host->ioaddr + reg);
 702 }
 703
 704 static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
 705 {
 706         return readl(host->ioaddr + reg);
 707 }
 708
 709 static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
 710 {
 711         return readw(host->ioaddr + reg);
 712 }
 713
 714 static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
 715 {
 716         return readb(host->ioaddr + reg);
 717 }
 718
 719 #endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */
 720
 721 struct sdhci_host *sdhci_alloc_host(struct device *dev, size_t priv_size);
 722 void sdhci_free_host(struct sdhci_host *host);
 723
 724 static inline void *sdhci_priv(struct sdhci_host *host)
 725 {
 726         return host->private;
 727 }
 728
 729 void sdhci_card_detect(struct sdhci_host *host);
 730 void __sdhci_read_caps(struct sdhci_host *host, u16 *ver, u32 *caps,
 731                        u32 *caps1);
 732 int sdhci_setup_host(struct sdhci_host *host);
 733 void sdhci_cleanup_host(struct sdhci_host *host);
 734 int __sdhci_add_host(struct sdhci_host *host);
 735 int sdhci_add_host(struct sdhci_host *host);
 736 void sdhci_remove_host(struct sdhci_host *host, int dead);
 737 void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd);
 738
 739 static inline void sdhci_read_caps(struct sdhci_host *host)
 740 {
 741         __sdhci_read_caps(host, NULL, NULL, NULL);
 742 }
 743
 744 static inline bool sdhci_sdio_irq_enabled(struct sdhci_host *host)
 745 {
 746         return !!(host->flags & SDHCI_SDIO_IRQ_ENABLED);
 747 }
 748
 749 u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
 750                    unsigned int *actual_clock);
 751 void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);
 752 void sdhci_enable_clk(struct sdhci_host *host, u16 clk);
 753 void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
 754                      unsigned short vdd);
 755 void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
 756                            unsigned short vdd);
 757 void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
 758 void sdhci_set_bus_width(struct sdhci_host *host, int width);
 759 void sdhci_reset(struct sdhci_host *host, u8 mask);
 760 void sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned timing);
 761 int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);
 762 void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
 763 int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
 764                                       struct mmc_ios *ios);
 765 void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable);
 766 void sdhci_adma_write_desc(struct sdhci_host *host, void **desc,
 767                            dma_addr_t addr, int len, unsigned int cmd);
 768
 769 #ifdef CONFIG_PM
 770 int sdhci_suspend_host(struct sdhci_host *host);
 771 int sdhci_resume_host(struct sdhci_host *host);
 772 int sdhci_runtime_suspend_host(struct sdhci_host *host);
 773 int sdhci_runtime_resume_host(struct sdhci_host *host);
 774 #endif
 775
 776 void sdhci_cqe_enable(struct mmc_host *mmc);
 777 void sdhci_cqe_disable(struct mmc_host *mmc, bool recovery);
 778 bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error,
 779                    int *data_error);
 780
 781 void sdhci_dumpregs(struct sdhci_host *host);
 782 void sdhci_enable_v4_mode(struct sdhci_host *host);
 783
 784 void sdhci_start_tuning(struct sdhci_host *host);
 785 void sdhci_end_tuning(struct sdhci_host *host);
 786 void sdhci_reset_tuning(struct sdhci_host *host);
 787 void sdhci_send_tuning(struct sdhci_host *host, u32 opcode);
 788
 789 #endif /* __SDHCI_HW_H */