drivers/mmc/host/mmci.h

   1 /*
   2  *  linux/drivers/mmc/host/mmci.h - ARM PrimeCell MMCI PL180/1 driver
   3  *
   4  *  Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #define MMCIPOWER               0x000
  11 #define MCI_PWR_OFF             0x00
  12 #define MCI_PWR_UP              0x02
  13 #define MCI_PWR_ON              0x03
  14 #define MCI_OD                  (1 << 6)
  15 #define MCI_ROD                 (1 << 7)
  16 /*
  17  * The ST Micro version does not have ROD and reuse the voltage registers for
  18  * direction settings.
  19  */
  20 #define MCI_ST_DATA2DIREN       (1 << 2)
  21 #define MCI_ST_CMDDIREN         (1 << 3)
  22 #define MCI_ST_DATA0DIREN       (1 << 4)
  23 #define MCI_ST_DATA31DIREN      (1 << 5)
  24 #define MCI_ST_FBCLKEN          (1 << 7)
  25 #define MCI_ST_DATA74DIREN      (1 << 8)
  26
  27 #define MMCICLOCK               0x004
  28 #define MCI_CLK_ENABLE          (1 << 8)
  29 #define MCI_CLK_PWRSAVE         (1 << 9)
  30 #define MCI_CLK_BYPASS          (1 << 10)
  31 #define MCI_4BIT_BUS            (1 << 11)
  32 /*
  33  * 8bit wide buses, hardware flow contronl, negative edges and clock inversion
  34  * supported in ST Micro U300 and Ux500 versions
  35  */
  36 #define MCI_ST_8BIT_BUS         (1 << 12)
  37 #define MCI_ST_U300_HWFCEN      (1 << 13)
  38 #define MCI_ST_UX500_NEG_EDGE   (1 << 13)
  39 #define MCI_ST_UX500_HWFCEN     (1 << 14)
  40 #define MCI_ST_UX500_CLK_INV    (1 << 15)
  41 /* Modified PL180 on Versatile Express platform */
  42 #define MCI_ARM_HWFCEN          (1 << 12)
  43
  44 /* Modified on Qualcomm Integrations */
  45 #define MCI_QCOM_CLK_WIDEBUS_8  (BIT(10) | BIT(11))
  46 #define MCI_QCOM_CLK_FLOWENA    BIT(12)
  47 #define MCI_QCOM_CLK_INVERTOUT  BIT(13)
  48
  49 /* select in latch data and command in */
  50 #define MCI_QCOM_CLK_SELECT_IN_FBCLK    BIT(15)
  51 #define MCI_QCOM_CLK_SELECT_IN_DDR_MODE (BIT(14) | BIT(15))
  52
  53 #define MMCIARGUMENT            0x008
  54
  55 /* The command register controls the Command Path State Machine (CPSM) */
  56 #define MMCICOMMAND             0x00c
  57 #define MCI_CPSM_RESPONSE       BIT(6)
  58 #define MCI_CPSM_LONGRSP        BIT(7)
  59 #define MCI_CPSM_INTERRUPT      BIT(8)
  60 #define MCI_CPSM_PENDING        BIT(9)
  61 #define MCI_CPSM_ENABLE         BIT(10)
  62 /* Command register flag extenstions in the ST Micro versions */
  63 #define MCI_CPSM_ST_SDIO_SUSP           BIT(11)
  64 #define MCI_CPSM_ST_ENCMD_COMPL         BIT(12)
  65 #define MCI_CPSM_ST_NIEN                BIT(13)
  66 #define MCI_CPSM_ST_CE_ATACMD           BIT(14)
  67 /* Command register flag extensions in the Qualcomm versions */
  68 #define MCI_CPSM_QCOM_PROGENA           BIT(11)
  69 #define MCI_CPSM_QCOM_DATCMD            BIT(12)
  70 #define MCI_CPSM_QCOM_MCIABORT          BIT(13)
  71 #define MCI_CPSM_QCOM_CCSENABLE         BIT(14)
  72 #define MCI_CPSM_QCOM_CCSDISABLE        BIT(15)
  73 #define MCI_CPSM_QCOM_AUTO_CMD19        BIT(16)
  74 #define MCI_CPSM_QCOM_AUTO_CMD21        BIT(21)
  75
  76 #define MMCIRESPCMD             0x010
  77 #define MMCIRESPONSE0           0x014
  78 #define MMCIRESPONSE1           0x018
  79 #define MMCIRESPONSE2           0x01c
  80 #define MMCIRESPONSE3           0x020
  81 #define MMCIDATATIMER           0x024
  82 #define MMCIDATALENGTH          0x028
  83
  84 /* The data control register controls the Data Path State Machine (DPSM) */
  85 #define MMCIDATACTRL            0x02c
  86 #define MCI_DPSM_ENABLE         BIT(0)
  87 #define MCI_DPSM_DIRECTION      BIT(1)
  88 #define MCI_DPSM_MODE           BIT(2)
  89 #define MCI_DPSM_DMAENABLE      BIT(3)
  90 #define MCI_DPSM_BLOCKSIZE      BIT(4)
  91 /* Control register extensions in the ST Micro U300 and Ux500 versions */
  92 #define MCI_DPSM_ST_RWSTART     BIT(8)
  93 #define MCI_DPSM_ST_RWSTOP      BIT(9)
  94 #define MCI_DPSM_ST_RWMOD       BIT(10)
  95 #define MCI_DPSM_ST_SDIOEN      BIT(11)
  96 /* Control register extensions in the ST Micro Ux500 versions */
  97 #define MCI_DPSM_ST_DMAREQCTL   BIT(12)
  98 #define MCI_DPSM_ST_DBOOTMODEEN BIT(13)
  99 #define MCI_DPSM_ST_BUSYMODE    BIT(14)
 100 #define MCI_DPSM_ST_DDRMODE     BIT(15)
 101 /* Control register extensions in the Qualcomm versions */
 102 #define MCI_DPSM_QCOM_DATA_PEND BIT(17)
 103 #define MCI_DPSM_QCOM_RX_DATA_PEND BIT(20)
 104
 105 #define MMCIDATACNT             0x030
 106 #define MMCISTATUS              0x034
 107 #define MCI_CMDCRCFAIL          (1 << 0)
 108 #define MCI_DATACRCFAIL         (1 << 1)
 109 #define MCI_CMDTIMEOUT          (1 << 2)
 110 #define MCI_DATATIMEOUT         (1 << 3)
 111 #define MCI_TXUNDERRUN          (1 << 4)
 112 #define MCI_RXOVERRUN           (1 << 5)
 113 #define MCI_CMDRESPEND          (1 << 6)
 114 #define MCI_CMDSENT             (1 << 7)
 115 #define MCI_DATAEND             (1 << 8)
 116 #define MCI_STARTBITERR         (1 << 9)
 117 #define MCI_DATABLOCKEND        (1 << 10)
 118 #define MCI_CMDACTIVE           (1 << 11)
 119 #define MCI_TXACTIVE            (1 << 12)
 120 #define MCI_RXACTIVE            (1 << 13)
 121 #define MCI_TXFIFOHALFEMPTY     (1 << 14)
 122 #define MCI_RXFIFOHALFFULL      (1 << 15)
 123 #define MCI_TXFIFOFULL          (1 << 16)
 124 #define MCI_RXFIFOFULL          (1 << 17)
 125 #define MCI_TXFIFOEMPTY         (1 << 18)
 126 #define MCI_RXFIFOEMPTY         (1 << 19)
 127 #define MCI_TXDATAAVLBL         (1 << 20)
 128 #define MCI_RXDATAAVLBL         (1 << 21)
 129 /* Extended status bits for the ST Micro variants */
 130 #define MCI_ST_SDIOIT           (1 << 22)
 131 #define MCI_ST_CEATAEND         (1 << 23)
 132 #define MCI_ST_CARDBUSY         (1 << 24)
 133
 134 #define MMCICLEAR               0x038
 135 #define MCI_CMDCRCFAILCLR       (1 << 0)
 136 #define MCI_DATACRCFAILCLR      (1 << 1)
 137 #define MCI_CMDTIMEOUTCLR       (1 << 2)
 138 #define MCI_DATATIMEOUTCLR      (1 << 3)
 139 #define MCI_TXUNDERRUNCLR       (1 << 4)
 140 #define MCI_RXOVERRUNCLR        (1 << 5)
 141 #define MCI_CMDRESPENDCLR       (1 << 6)
 142 #define MCI_CMDSENTCLR          (1 << 7)
 143 #define MCI_DATAENDCLR          (1 << 8)
 144 #define MCI_STARTBITERRCLR      (1 << 9)
 145 #define MCI_DATABLOCKENDCLR     (1 << 10)
 146 /* Extended status bits for the ST Micro variants */
 147 #define MCI_ST_SDIOITC          (1 << 22)
 148 #define MCI_ST_CEATAENDC        (1 << 23)
 149 #define MCI_ST_BUSYENDC         (1 << 24)
 150
 151 #define MMCIMASK0               0x03c
 152 #define MCI_CMDCRCFAILMASK      (1 << 0)
 153 #define MCI_DATACRCFAILMASK     (1 << 1)
 154 #define MCI_CMDTIMEOUTMASK      (1 << 2)
 155 #define MCI_DATATIMEOUTMASK     (1 << 3)
 156 #define MCI_TXUNDERRUNMASK      (1 << 4)
 157 #define MCI_RXOVERRUNMASK       (1 << 5)
 158 #define MCI_CMDRESPENDMASK      (1 << 6)
 159 #define MCI_CMDSENTMASK         (1 << 7)
 160 #define MCI_DATAENDMASK         (1 << 8)
 161 #define MCI_STARTBITERRMASK     (1 << 9)
 162 #define MCI_DATABLOCKENDMASK    (1 << 10)
 163 #define MCI_CMDACTIVEMASK       (1 << 11)
 164 #define MCI_TXACTIVEMASK        (1 << 12)
 165 #define MCI_RXACTIVEMASK        (1 << 13)
 166 #define MCI_TXFIFOHALFEMPTYMASK (1 << 14)
 167 #define MCI_RXFIFOHALFFULLMASK  (1 << 15)
 168 #define MCI_TXFIFOFULLMASK      (1 << 16)
 169 #define MCI_RXFIFOFULLMASK      (1 << 17)
 170 #define MCI_TXFIFOEMPTYMASK     (1 << 18)
 171 #define MCI_RXFIFOEMPTYMASK     (1 << 19)
 172 #define MCI_TXDATAAVLBLMASK     (1 << 20)
 173 #define MCI_RXDATAAVLBLMASK     (1 << 21)
 174 /* Extended status bits for the ST Micro variants */
 175 #define MCI_ST_SDIOITMASK       (1 << 22)
 176 #define MCI_ST_CEATAENDMASK     (1 << 23)
 177 #define MCI_ST_BUSYENDMASK      (1 << 24)
 178
 179 #define MMCIMASK1               0x040
 180 #define MMCIFIFOCNT             0x048
 181 #define MMCIFIFO                0x080 /* to 0x0bc */
 182
 183 #define MCI_IRQENABLE   \
 184         (MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK|     \
 185         MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK|       \
 186         MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_STARTBITERRMASK)
 187
 188 /* These interrupts are directed to IRQ1 when two IRQ lines are available */
 189 #define MCI_IRQ1MASK \
 190         (MCI_RXFIFOHALFFULLMASK | MCI_RXDATAAVLBLMASK | \
 191          MCI_TXFIFOHALFEMPTYMASK)
 192
 193 #define NR_SG           128
 194
 195 #define MMCI_PINCTRL_STATE_OPENDRAIN "opendrain"
 196
 197 struct clk;
 198 struct dma_chan;
 199 struct mmci_host;
 200
 201 /**
 202  * struct variant_data - MMCI variant-specific quirks
 203  * @clkreg: default value for MCICLOCK register
 204  * @clkreg_enable: enable value for MMCICLOCK register
 205  * @clkreg_8bit_bus_enable: enable value for 8 bit bus
 206  * @clkreg_neg_edge_enable: enable value for inverted data/cmd output
 207  * @datalength_bits: number of bits in the MMCIDATALENGTH register
 208  * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY
 209  *            is asserted (likewise for RX)
 210  * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY
 211  *                is asserted (likewise for RX)
 212  * @data_cmd_enable: enable value for data commands.
 213  * @st_sdio: enable ST specific SDIO logic
 214  * @st_clkdiv: true if using a ST-specific clock divider algorithm
 215  * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
 216  * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
 217  * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl
 218  *                   register
 219  * @datactrl_mask_sdio: SDIO enable mask in datactrl register
 220  * @pwrreg_powerup: power up value for MMCIPOWER register
 221  * @f_max: maximum clk frequency supported by the controller.
 222  * @signal_direction: input/out direction of bus signals can be indicated
 223  * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock
 224  * @busy_detect: true if the variant supports busy detection on DAT0.
 225  * @busy_dpsm_flag: bitmask enabling busy detection in the DPSM
 226  * @busy_detect_flag: bitmask identifying the bit in the MMCISTATUS register
 227  *                    indicating that the card is busy
 228  * @busy_detect_mask: bitmask identifying the bit in the MMCIMASK0 to mask for
 229  *                    getting busy end detection interrupts
 230  * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply
 231  * @explicit_mclk_control: enable explicit mclk control in driver.
 232  * @qcom_fifo: enables qcom specific fifo pio read logic.
 233  * @qcom_dml: enables qcom specific dma glue for dma transfers.
 234  * @reversed_irq_handling: handle data irq before cmd irq.
 235  * @mmcimask1: true if variant have a MMCIMASK1 register.
 236  * @start_err: bitmask identifying the STARTBITERR bit inside MMCISTATUS
 237  *             register.
 238  * @opendrain: bitmask identifying the OPENDRAIN bit inside MMCIPOWER register
 239  */
 240 struct variant_data {
 241         unsigned int            clkreg;
 242         unsigned int            clkreg_enable;
 243         unsigned int            clkreg_8bit_bus_enable;
 244         unsigned int            clkreg_neg_edge_enable;
 245         unsigned int            datalength_bits;
 246         unsigned int            fifosize;
 247         unsigned int            fifohalfsize;
 248         unsigned int            data_cmd_enable;
 249         unsigned int            datactrl_mask_ddrmode;
 250         unsigned int            datactrl_mask_sdio;
 251         u8                      st_sdio:1;
 252         u8                      st_clkdiv:1;
 253         u8                      blksz_datactrl16:1;
 254         u8                      blksz_datactrl4:1;
 255         u32                     pwrreg_powerup;
 256         u32                     f_max;
 257         u8                      signal_direction:1;
 258         u8                      pwrreg_clkgate:1;
 259         u8                      busy_detect:1;
 260         u32                     busy_dpsm_flag;
 261         u32                     busy_detect_flag;
 262         u32                     busy_detect_mask;
 263         u8                      pwrreg_nopower:1;
 264         u8                      explicit_mclk_control:1;
 265         u8                      qcom_fifo:1;
 266         u8                      qcom_dml:1;
 267         u8                      reversed_irq_handling:1;
 268         u8                      mmcimask1:1;
 269         u32                     start_err;
 270         u32                     opendrain;
 271         void (*init)(struct mmci_host *host);
 272 };
 273
 274 /* mmci variant callbacks */
 275 struct mmci_host_ops {
 276         int (*dma_setup)(struct mmci_host *host);
 277         void (*dma_release)(struct mmci_host *host);
 278 };
 279
 280 struct mmci_host {
 281         phys_addr_t             phybase;
 282         void __iomem            *base;
 283         struct mmc_request      *mrq;
 284         struct mmc_command      *cmd;
 285         struct mmc_data         *data;
 286         struct mmc_host         *mmc;
 287         struct clk              *clk;
 288         u8                      singleirq:1;
 289
 290         spinlock_t              lock;
 291
 292         unsigned int            mclk;
 293         /* cached value of requested clk in set_ios */
 294         unsigned int            clock_cache;
 295         unsigned int            cclk;
 296         u32                     pwr_reg;
 297         u32                     pwr_reg_add;
 298         u32                     clk_reg;
 299         u32                     datactrl_reg;
 300         u32                     busy_status;
 301         u32                     mask1_reg;
 302         u8                      vqmmc_enabled:1;
 303         struct mmci_platform_data *plat;
 304         struct mmci_host_ops    *ops;
 305         struct variant_data     *variant;
 306         struct pinctrl          *pinctrl;
 307         struct pinctrl_state    *pins_default;
 308         struct pinctrl_state    *pins_opendrain;
 309
 310         u8                      hw_designer;
 311         u8                      hw_revision:4;
 312
 313         struct timer_list       timer;
 314         unsigned int            oldstat;
 315
 316         /* pio stuff */
 317         struct sg_mapping_iter  sg_miter;
 318         unsigned int            size;
 319         int (*get_rx_fifocnt)(struct mmci_host *h, u32 status, int remain);
 320
 321         u8                      use_dma:1;
 322         u8                      dma_in_progress:1;
 323         void                    *dma_priv;
 324
 325         s32                     next_cookie;
 326 };
 327
 328 #define dma_inprogress(host)    ((host)->dma_in_progress)
 329
 330 int mmci_dmae_setup(struct mmci_host *host);
 331 void mmci_dmae_release(struct mmci_host *host);
 332