drivers/mmc/host/tmio_mmc.h

   1 /* Definitons for use with the tmio_mmc.c
   2  *
   3  * (c) 2004 Ian Molton <spyro@f2s.com>
   4  * (c) 2007 Ian Molton <spyro@f2s.com>
   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  */
  11
  12 #include <linux/highmem.h>
  13
  14 #define CNF_CMD     0x04
  15 #define CNF_CTL_BASE   0x10
  16 #define CNF_INT_PIN  0x3d
  17 #define CNF_STOP_CLK_CTL 0x40
  18 #define CNF_GCLK_CTL 0x41
  19 #define CNF_SD_CLK_MODE 0x42
  20 #define CNF_PIN_STATUS 0x44
  21 #define CNF_PWR_CTL_1 0x48
  22 #define CNF_PWR_CTL_2 0x49
  23 #define CNF_PWR_CTL_3 0x4a
  24 #define CNF_CARD_DETECT_MODE 0x4c
  25 #define CNF_SD_SLOT 0x50
  26 #define CNF_EXT_GCLK_CTL_1 0xf0
  27 #define CNF_EXT_GCLK_CTL_2 0xf1
  28 #define CNF_EXT_GCLK_CTL_3 0xf9
  29 #define CNF_SD_LED_EN_1 0xfa
  30 #define CNF_SD_LED_EN_2 0xfe
  31
  32 #define   SDCREN 0x2   /* Enable access to MMC CTL regs. (flag in COMMAND_REG)*/
  33
  34 #define CTL_SD_CMD 0x00
  35 #define CTL_ARG_REG 0x04
  36 #define CTL_STOP_INTERNAL_ACTION 0x08
  37 #define CTL_XFER_BLK_COUNT 0xa
  38 #define CTL_RESPONSE 0x0c
  39 #define CTL_STATUS 0x1c
  40 #define CTL_IRQ_MASK 0x20
  41 #define CTL_SD_CARD_CLK_CTL 0x24
  42 #define CTL_SD_XFER_LEN 0x26
  43 #define CTL_SD_MEM_CARD_OPT 0x28
  44 #define CTL_SD_ERROR_DETAIL_STATUS 0x2c
  45 #define CTL_SD_DATA_PORT 0x30
  46 #define CTL_TRANSACTION_CTL 0x34
  47 #define CTL_RESET_SD 0xe0
  48 #define CTL_SDIO_REGS 0x100
  49 #define CTL_CLK_AND_WAIT_CTL 0x138
  50 #define CTL_RESET_SDIO 0x1e0
  51
  52 /* Definitions for values the CTRL_STATUS register can take. */
  53 #define TMIO_STAT_CMDRESPEND    0x00000001
  54 #define TMIO_STAT_DATAEND       0x00000004
  55 #define TMIO_STAT_CARD_REMOVE   0x00000008
  56 #define TMIO_STAT_CARD_INSERT   0x00000010
  57 #define TMIO_STAT_SIGSTATE      0x00000020
  58 #define TMIO_STAT_WRPROTECT     0x00000080
  59 #define TMIO_STAT_CARD_REMOVE_A 0x00000100
  60 #define TMIO_STAT_CARD_INSERT_A 0x00000200
  61 #define TMIO_STAT_SIGSTATE_A    0x00000400
  62 #define TMIO_STAT_CMD_IDX_ERR   0x00010000
  63 #define TMIO_STAT_CRCFAIL       0x00020000
  64 #define TMIO_STAT_STOPBIT_ERR   0x00040000
  65 #define TMIO_STAT_DATATIMEOUT   0x00080000
  66 #define TMIO_STAT_RXOVERFLOW    0x00100000
  67 #define TMIO_STAT_TXUNDERRUN    0x00200000
  68 #define TMIO_STAT_CMDTIMEOUT    0x00400000
  69 #define TMIO_STAT_RXRDY         0x01000000
  70 #define TMIO_STAT_TXRQ          0x02000000
  71 #define TMIO_STAT_ILL_FUNC      0x20000000
  72 #define TMIO_STAT_CMD_BUSY      0x40000000
  73 #define TMIO_STAT_ILL_ACCESS    0x80000000
  74
  75 /* Define some IRQ masks */
  76 /* This is the mask used at reset by the chip */
  77 #define TMIO_MASK_ALL           0x837f031d
  78 #define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND | \
  79                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  80 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND | \
  81                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  82 #define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
  83                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  84 #define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
  85
  86
  87 #define enable_mmc_irqs(host, i) \
  88         do { \
  89                 u32 mask;\
  90                 mask  = sd_ctrl_read32((host), CTL_IRQ_MASK); \
  91                 mask &= ~((i) & TMIO_MASK_IRQ); \
  92                 sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
  93         } while (0)
  94
  95 #define disable_mmc_irqs(host, i) \
  96         do { \
  97                 u32 mask;\
  98                 mask  = sd_ctrl_read32((host), CTL_IRQ_MASK); \
  99                 mask |= ((i) & TMIO_MASK_IRQ); \
 100                 sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
 101         } while (0)
 102
 103 #define ack_mmc_irqs(host, i) \
 104         do { \
 105                 sd_ctrl_write32((host), CTL_STATUS, ~(i)); \
 106         } while (0)
 107
 108
 109 struct tmio_mmc_host {
 110         void __iomem *cnf;
 111         void __iomem *ctl;
 112         unsigned long bus_shift;
 113         struct mmc_command      *cmd;
 114         struct mmc_request      *mrq;
 115         struct mmc_data         *data;
 116         struct mmc_host         *mmc;
 117         int                     irq;
 118
 119         /* pio related stuff */
 120         struct scatterlist      *sg_ptr;
 121         unsigned int            sg_len;
 122         unsigned int            sg_off;
 123 };
 124
 125 #include <linux/io.h>
 126
 127 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
 128 {
 129         return readw(host->ctl + (addr << host->bus_shift));
 130 }
 131
 132 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
 133                 u16 *buf, int count)
 134 {
 135         readsw(host->ctl + (addr << host->bus_shift), buf, count);
 136 }
 137
 138 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
 139 {
 140         return readw(host->ctl + (addr << host->bus_shift)) |
 141                readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
 142 }
 143
 144 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr,
 145                 u16 val)
 146 {
 147         writew(val, host->ctl + (addr << host->bus_shift));
 148 }
 149
 150 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
 151                 u16 *buf, int count)
 152 {
 153         writesw(host->ctl + (addr << host->bus_shift), buf, count);
 154 }
 155
 156 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr,
 157                 u32 val)
 158 {
 159         writew(val, host->ctl + (addr << host->bus_shift));
 160         writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 161 }
 162
 163 static inline void sd_config_write8(struct tmio_mmc_host *host, int addr,
 164                 u8 val)
 165 {
 166         writeb(val, host->cnf + (addr << host->bus_shift));
 167 }
 168
 169 static inline void sd_config_write16(struct tmio_mmc_host *host, int addr,
 170                 u16 val)
 171 {
 172         writew(val, host->cnf + (addr << host->bus_shift));
 173 }
 174
 175 static inline void sd_config_write32(struct tmio_mmc_host *host, int addr,
 176                 u32 val)
 177 {
 178         writew(val, host->cnf + (addr << host->bus_shift));
 179         writew(val >> 16, host->cnf + ((addr + 2) << host->bus_shift));
 180 }
 181
 182 #include <linux/scatterlist.h>
 183 #include <linux/blkdev.h>
 184
 185 static inline void tmio_mmc_init_sg(struct tmio_mmc_host *host,
 186         struct mmc_data *data)
 187 {
 188         host->sg_len = data->sg_len;
 189         host->sg_ptr = data->sg;
 190         host->sg_off = 0;
 191 }
 192
 193 static inline int tmio_mmc_next_sg(struct tmio_mmc_host *host)
 194 {
 195         host->sg_ptr = sg_next(host->sg_ptr);
 196         host->sg_off = 0;
 197         return --host->sg_len;
 198 }
 199
 200 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 201         unsigned long *flags)
 202 {
 203         local_irq_save(*flags);
 204         return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
 205 }
 206
 207 static inline void tmio_mmc_kunmap_atomic(void *virt,
 208         unsigned long *flags)
 209 {
 210         kunmap_atomic(virt, KM_BIO_SRC_IRQ);
 211         local_irq_restore(*flags);
 212 }
 213
 214 #ifdef CONFIG_MMC_DEBUG
 215
 216 #define STATUS_TO_TEXT(a) \
 217         do { \
 218                 if (status & TMIO_STAT_##a) \
 219                         printk(#a); \
 220         } while (0)
 221
 222 void pr_debug_status(u32 status)
 223 {
 224         printk(KERN_DEBUG "status: %08x = ", status);
 225         STATUS_TO_TEXT(CARD_REMOVE);
 226         STATUS_TO_TEXT(CARD_INSERT);
 227         STATUS_TO_TEXT(SIGSTATE);
 228         STATUS_TO_TEXT(WRPROTECT);
 229         STATUS_TO_TEXT(CARD_REMOVE_A);
 230         STATUS_TO_TEXT(CARD_INSERT_A);
 231         STATUS_TO_TEXT(SIGSTATE_A);
 232         STATUS_TO_TEXT(CMD_IDX_ERR);
 233         STATUS_TO_TEXT(STOPBIT_ERR);
 234         STATUS_TO_TEXT(ILL_FUNC);
 235         STATUS_TO_TEXT(CMD_BUSY);
 236         STATUS_TO_TEXT(CMDRESPEND);
 237         STATUS_TO_TEXT(DATAEND);
 238         STATUS_TO_TEXT(CRCFAIL);
 239         STATUS_TO_TEXT(DATATIMEOUT);
 240         STATUS_TO_TEXT(CMDTIMEOUT);
 241         STATUS_TO_TEXT(RXOVERFLOW);
 242         STATUS_TO_TEXT(TXUNDERRUN);
 243         STATUS_TO_TEXT(RXRDY);
 244         STATUS_TO_TEXT(TXRQ);
 245         STATUS_TO_TEXT(ILL_ACCESS);
 246         printk("\n");
 247 }
 248
 249 #else
 250 #define pr_debug_status(s)  do { } while (0)
 251 #endif