include/dwmmc.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * (C) Copyright 2012 SAMSUNG Electronics
   4  * Jaehoon Chung <jh80.chung@samsung.com>
   5  */
   6
   7 #ifndef __DWMMC_HW_H
   8 #define __DWMMC_HW_H
   9
  10 #include <asm/io.h>
  11 #include <mmc.h>
  12
  13 #define DWMCI_CTRL              0x000
  14 #define DWMCI_PWREN             0x004
  15 #define DWMCI_CLKDIV            0x008
  16 #define DWMCI_CLKSRC            0x00C
  17 #define DWMCI_CLKENA            0x010
  18 #define DWMCI_TMOUT             0x014
  19 #define DWMCI_CTYPE             0x018
  20 #define DWMCI_BLKSIZ            0x01C
  21 #define DWMCI_BYTCNT            0x020
  22 #define DWMCI_INTMASK           0x024
  23 #define DWMCI_CMDARG            0x028
  24 #define DWMCI_CMD               0x02C
  25 #define DWMCI_RESP0             0x030
  26 #define DWMCI_RESP1             0x034
  27 #define DWMCI_RESP2             0x038
  28 #define DWMCI_RESP3             0x03C
  29 #define DWMCI_MINTSTS           0x040
  30 #define DWMCI_RINTSTS           0x044
  31 #define DWMCI_STATUS            0x048
  32 #define DWMCI_FIFOTH            0x04C
  33 #define DWMCI_CDETECT           0x050
  34 #define DWMCI_WRTPRT            0x054
  35 #define DWMCI_GPIO              0x058
  36 #define DWMCI_TCMCNT            0x05C
  37 #define DWMCI_TBBCNT            0x060
  38 #define DWMCI_DEBNCE            0x064
  39 #define DWMCI_USRID             0x068
  40 #define DWMCI_VERID             0x06C
  41 #define DWMCI_HCON              0x070
  42 #define DWMCI_UHS_REG           0x074
  43 #define DWMCI_BMOD              0x080
  44 #define DWMCI_PLDMND            0x084
  45 #define DWMCI_DBADDR            0x088
  46 #define DWMCI_IDSTS             0x08C
  47 #define DWMCI_IDINTEN           0x090
  48 #define DWMCI_DSCADDR           0x094
  49 #define DWMCI_BUFADDR           0x098
  50 #define DWMCI_DATA              0x200
  51
  52 /* Interrupt Mask register */
  53 #define DWMCI_INTMSK_ALL        0xffffffff
  54 #define DWMCI_INTMSK_RE         (1 << 1)
  55 #define DWMCI_INTMSK_CDONE      (1 << 2)
  56 #define DWMCI_INTMSK_DTO        (1 << 3)
  57 #define DWMCI_INTMSK_TXDR       (1 << 4)
  58 #define DWMCI_INTMSK_RXDR       (1 << 5)
  59 #define DWMCI_INTMSK_RCRC       (1 << 6)
  60 #define DWMCI_INTMSK_DCRC       (1 << 7)
  61 #define DWMCI_INTMSK_RTO        (1 << 8)
  62 #define DWMCI_INTMSK_DRTO       (1 << 9)
  63 #define DWMCI_INTMSK_HTO        (1 << 10)
  64 #define DWMCI_INTMSK_FRUN       (1 << 11)
  65 #define DWMCI_INTMSK_HLE        (1 << 12)
  66 #define DWMCI_INTMSK_SBE        (1 << 13)
  67 #define DWMCI_INTMSK_ACD        (1 << 14)
  68 #define DWMCI_INTMSK_EBE        (1 << 15)
  69
  70 /* Raw interrupt Regsiter */
  71 #define DWMCI_DATA_ERR  (DWMCI_INTMSK_EBE | DWMCI_INTMSK_SBE | DWMCI_INTMSK_HLE |\
  72                         DWMCI_INTMSK_FRUN | DWMCI_INTMSK_EBE | DWMCI_INTMSK_DCRC)
  73 #define DWMCI_DATA_TOUT (DWMCI_INTMSK_HTO | DWMCI_INTMSK_DRTO)
  74 /* CTRL register */
  75 #define DWMCI_CTRL_RESET        (1 << 0)
  76 #define DWMCI_CTRL_FIFO_RESET   (1 << 1)
  77 #define DWMCI_CTRL_DMA_RESET    (1 << 2)
  78 #define DWMCI_DMA_EN            (1 << 5)
  79 #define DWMCI_CTRL_SEND_AS_CCSD (1 << 10)
  80 #define DWMCI_IDMAC_EN          (1 << 25)
  81 #define DWMCI_RESET_ALL         (DWMCI_CTRL_RESET | DWMCI_CTRL_FIFO_RESET |\
  82                                 DWMCI_CTRL_DMA_RESET)
  83
  84 /* CMD register */
  85 #define DWMCI_CMD_RESP_EXP      (1 << 6)
  86 #define DWMCI_CMD_RESP_LENGTH   (1 << 7)
  87 #define DWMCI_CMD_CHECK_CRC     (1 << 8)
  88 #define DWMCI_CMD_DATA_EXP      (1 << 9)
  89 #define DWMCI_CMD_RW            (1 << 10)
  90 #define DWMCI_CMD_SEND_STOP     (1 << 12)
  91 #define DWMCI_CMD_ABORT_STOP    (1 << 14)
  92 #define DWMCI_CMD_PRV_DAT_WAIT  (1 << 13)
  93 #define DWMCI_CMD_UPD_CLK       (1 << 21)
  94 #define DWMCI_CMD_USE_HOLD_REG  (1 << 29)
  95 #define DWMCI_CMD_START         (1 << 31)
  96
  97 /* CLKENA register */
  98 #define DWMCI_CLKEN_ENABLE      (1 << 0)
  99 #define DWMCI_CLKEN_LOW_PWR     (1 << 16)
 100
 101 /* Card-type registe */
 102 #define DWMCI_CTYPE_1BIT        0
 103 #define DWMCI_CTYPE_4BIT        (1 << 0)
 104 #define DWMCI_CTYPE_8BIT        (1 << 16)
 105
 106 /* Status Register */
 107 #define DWMCI_FIFO_EMPTY        (1 << 2)
 108 #define DWMCI_FIFO_FULL         (1 << 3)
 109 #define DWMCI_BUSY              (1 << 9)
 110 #define DWMCI_FIFO_MASK         0x1fff
 111 #define DWMCI_FIFO_SHIFT        17
 112
 113 /* FIFOTH Register */
 114 #define MSIZE(x)                ((x) << 28)
 115 #define RX_WMARK(x)             ((x) << 16)
 116 #define TX_WMARK(x)             (x)
 117 #define RX_WMARK_SHIFT          16
 118 #define RX_WMARK_MASK           (0xfff << RX_WMARK_SHIFT)
 119
 120 #define DWMCI_IDMAC_OWN         (1 << 31)
 121 #define DWMCI_IDMAC_CH          (1 << 4)
 122 #define DWMCI_IDMAC_FS          (1 << 3)
 123 #define DWMCI_IDMAC_LD          (1 << 2)
 124
 125 /*  Bus Mode Register */
 126 #define DWMCI_BMOD_IDMAC_RESET  (1 << 0)
 127 #define DWMCI_BMOD_IDMAC_FB     (1 << 1)
 128 #define DWMCI_BMOD_IDMAC_EN     (1 << 7)
 129
 130 /* UHS register */
 131 #define DWMCI_DDR_MODE  (1 << 16)
 132
 133 /* Internal IDMAC interrupt defines */
 134 #define DWMCI_IDINTEN_RI                BIT(1)
 135 #define DWMCI_IDINTEN_TI                BIT(0)
 136
 137 #define DWMCI_IDINTEN_MASK      (DWMCI_IDINTEN_TI | \
 138                                  DWMCI_IDINTEN_RI)
 139
 140 /* quirks */
 141 #define DWMCI_QUIRK_DISABLE_SMU         (1 << 0)
 142
 143 /**
 144  * struct dwmci_host - Information about a designware MMC host
 145  *
 146  * @name:       Device name
 147  * @ioaddr:     Base I/O address of controller
 148  * @quirks:     Quick flags - see DWMCI_QUIRK_...
 149  * @caps:       Capabilities - see MMC_MODE_...
 150  * @bus_hz:     Bus speed in Hz, if @get_mmc_clk() is NULL
 151  * @div:        Arbitrary clock divider value for use by controller
 152  * @dev_index:  Arbitrary device index for use by controller
 153  * @dev_id:     Arbitrary device ID for use by controller
 154  * @buswidth:   Bus width in bits (8 or 4)
 155  * @fifoth_val: Value for FIFOTH register (or 0 to leave unset)
 156  * @mmc:        Pointer to generic MMC structure for this device
 157  * @priv:       Private pointer for use by controller
 158  */
 159 struct dwmci_host {
 160         const char *name;
 161         void *ioaddr;
 162         unsigned int quirks;
 163         unsigned int caps;
 164         unsigned int version;
 165         unsigned int clock;
 166         unsigned int bus_hz;
 167         unsigned int div;
 168         int dev_index;
 169         int dev_id;
 170         int buswidth;
 171         u32 fifoth_val;
 172         struct mmc *mmc;
 173         void *priv;
 174
 175         void (*clksel)(struct dwmci_host *host);
 176         void (*board_init)(struct dwmci_host *host);
 177
 178         /**
 179          * Get / set a particular MMC clock frequency
 180          *
 181          * This is used to request the current clock frequency of the clock
 182          * that drives the DWMMC peripheral. The caller will then use this
 183          * information to work out the divider it needs to achieve the
 184          * required MMC bus clock frequency. If you want to handle the
 185          * clock external to DWMMC, use @freq to select the frequency and
 186          * return that value too. Then DWMMC will put itself in bypass mode.
 187          *
 188          * @host:       DWMMC host
 189          * @freq:       Frequency the host is trying to achieve
 190          */
 191         unsigned int (*get_mmc_clk)(struct dwmci_host *host, uint freq);
 192 #ifndef CONFIG_BLK
 193         struct mmc_config cfg;
 194 #endif
 195
 196         /* use fifo mode to read and write data */
 197         bool fifo_mode;
 198 };
 199
 200 struct dwmci_idmac {
 201         u32 flags;
 202         u32 cnt;
 203         u32 addr;
 204         u32 next_addr;
 205 } __aligned(ARCH_DMA_MINALIGN);
 206
 207 static inline void dwmci_writel(struct dwmci_host *host, int reg, u32 val)
 208 {
 209         writel(val, host->ioaddr + reg);
 210 }
 211
 212 static inline void dwmci_writew(struct dwmci_host *host, int reg, u16 val)
 213 {
 214         writew(val, host->ioaddr + reg);
 215 }
 216
 217 static inline void dwmci_writeb(struct dwmci_host *host, int reg, u8 val)
 218 {
 219         writeb(val, host->ioaddr + reg);
 220 }
 221 static inline u32 dwmci_readl(struct dwmci_host *host, int reg)
 222 {
 223         return readl(host->ioaddr + reg);
 224 }
 225
 226 static inline u16 dwmci_readw(struct dwmci_host *host, int reg)
 227 {
 228         return readw(host->ioaddr + reg);
 229 }
 230
 231 static inline u8 dwmci_readb(struct dwmci_host *host, int reg)
 232 {
 233         return readb(host->ioaddr + reg);
 234 }
 235
 236 #ifdef CONFIG_BLK
 237 /**
 238  * dwmci_setup_cfg() - Set up the configuration for DWMMC
 239  *
 240  * This is used to set up a DWMMC device when you are using CONFIG_BLK.
 241  *
 242  * This should be called from your MMC driver's probe() method once you have
 243  * the information required.
 244  *
 245  * Generally your driver will have a platform data structure which holds both
 246  * the configuration (struct mmc_config) and the MMC device info (struct mmc).
 247  * For example:
 248  *
 249  * struct rockchip_mmc_plat {
 250  *      struct mmc_config cfg;
 251  *      struct mmc mmc;
 252  * };
 253  *
 254  * ...
 255  *
 256  * Inside U_BOOT_DRIVER():
 257  *      .platdata_auto_alloc_size = sizeof(struct rockchip_mmc_plat),
 258  *
 259  * To access platform data:
 260  *      struct rockchip_mmc_plat *plat = dev_get_platdata(dev);
 261  *
 262  * See rockchip_dw_mmc.c for an example.
 263  *
 264  * @cfg:        Configuration structure to fill in (generally &plat->mmc)
 265  * @host:       DWMMC host
 266  * @max_clk:    Maximum supported clock speed in HZ (e.g. 150000000)
 267  * @min_clk:    Minimum supported clock speed in HZ (e.g. 400000)
 268  */
 269 void dwmci_setup_cfg(struct mmc_config *cfg, struct dwmci_host *host,
 270                 u32 max_clk, u32 min_clk);
 271
 272 /**
 273  * dwmci_bind() - Set up a new MMC block device
 274  *
 275  * This is used to set up a DWMMC block device when you are using CONFIG_BLK.
 276  * It should be called from your driver's bind() method.
 277  *
 278  * See rockchip_dw_mmc.c for an example.
 279  *
 280  * @dev:        Device to set up
 281  * @mmc:        Pointer to mmc structure (normally &plat->mmc)
 282  * @cfg:        Empty configuration structure (generally &plat->cfg). This is
 283  *              normally all zeroes at this point. The only purpose of passing
 284  *              this in is to set mmc->cfg to it.
 285  * @return 0 if OK, -ve if the block device could not be created
 286  */
 287 int dwmci_bind(struct udevice *dev, struct mmc *mmc, struct mmc_config *cfg);
 288
 289 #else
 290 /**
 291  * add_dwmci() - Add a new DWMMC interface
 292  *
 293  * This is used when you are not using CONFIG_BLK. Convert your driver over!
 294  *
 295  * @host:       DWMMC host structure
 296  * @max_clk:    Maximum supported clock speed in HZ (e.g. 150000000)
 297  * @min_clk:    Minimum supported clock speed in HZ (e.g. 400000)
 298  * @return 0 if OK, -ve on error
 299  */
 300 int add_dwmci(struct dwmci_host *host, u32 max_clk, u32 min_clk);
 301 #endif /* !CONFIG_BLK */
 302
 303 #ifdef CONFIG_DM_MMC
 304 /* Export the operations to drivers */
 305 int dwmci_probe(struct udevice *dev);
 306 extern const struct dm_mmc_ops dm_dwmci_ops;
 307 #endif
 308
 309 #endif  /* __DWMMC_HW_H */