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 #define CNF_CMD     0x04
  12 #define CNF_CTL_BASE   0x10
  13 #define CNF_INT_PIN  0x3d
  14 #define CNF_STOP_CLK_CTL 0x40
  15 #define CNF_GCLK_CTL 0x41
  16 #define CNF_SD_CLK_MODE 0x42
  17 #define CNF_PIN_STATUS 0x44
  18 #define CNF_PWR_CTL_1 0x48
  19 #define CNF_PWR_CTL_2 0x49
  20 #define CNF_PWR_CTL_3 0x4a
  21 #define CNF_CARD_DETECT_MODE 0x4c
  22 #define CNF_SD_SLOT 0x50
  23 #define CNF_EXT_GCLK_CTL_1 0xf0
  24 #define CNF_EXT_GCLK_CTL_2 0xf1
  25 #define CNF_EXT_GCLK_CTL_3 0xf9
  26 #define CNF_SD_LED_EN_1 0xfa
  27 #define CNF_SD_LED_EN_2 0xfe
  28
  29 #define   SDCREN 0x2   /* Enable access to MMC CTL regs. (flag in COMMAND_REG)*/
  30
  31 #define CTL_SD_CMD 0x00
  32 #define CTL_ARG_REG 0x04
  33 #define CTL_STOP_INTERNAL_ACTION 0x08
  34 #define CTL_XFER_BLK_COUNT 0xa
  35 #define CTL_RESPONSE 0x0c
  36 #define CTL_STATUS 0x1c
  37 #define CTL_IRQ_MASK 0x20
  38 #define CTL_SD_CARD_CLK_CTL 0x24
  39 #define CTL_SD_XFER_LEN 0x26
  40 #define CTL_SD_MEM_CARD_OPT 0x28
  41 #define CTL_SD_ERROR_DETAIL_STATUS 0x2c
  42 #define CTL_SD_DATA_PORT 0x30
  43 #define CTL_TRANSACTION_CTL 0x34
  44 #define CTL_RESET_SD 0xe0
  45 #define CTL_SDIO_REGS 0x100
  46 #define CTL_CLK_AND_WAIT_CTL 0x138
  47 #define CTL_RESET_SDIO 0x1e0
  48
  49 /* Definitions for values the CTRL_STATUS register can take. */
  50 #define TMIO_STAT_CMDRESPEND    0x00000001
  51 #define TMIO_STAT_DATAEND       0x00000004
  52 #define TMIO_STAT_CARD_REMOVE   0x00000008
  53 #define TMIO_STAT_CARD_INSERT   0x00000010
  54 #define TMIO_STAT_SIGSTATE      0x00000020
  55 #define TMIO_STAT_WRPROTECT     0x00000080
  56 #define TMIO_STAT_CARD_REMOVE_A 0x00000100
  57 #define TMIO_STAT_CARD_INSERT_A 0x00000200
  58 #define TMIO_STAT_SIGSTATE_A    0x00000400
  59 #define TMIO_STAT_CMD_IDX_ERR   0x00010000
  60 #define TMIO_STAT_CRCFAIL       0x00020000
  61 #define TMIO_STAT_STOPBIT_ERR   0x00040000
  62 #define TMIO_STAT_DATATIMEOUT   0x00080000
  63 #define TMIO_STAT_RXOVERFLOW    0x00100000
  64 #define TMIO_STAT_TXUNDERRUN    0x00200000
  65 #define TMIO_STAT_CMDTIMEOUT    0x00400000
  66 #define TMIO_STAT_RXRDY         0x01000000
  67 #define TMIO_STAT_TXRQ          0x02000000
  68 #define TMIO_STAT_ILL_FUNC      0x20000000
  69 #define TMIO_STAT_CMD_BUSY      0x40000000
  70 #define TMIO_STAT_ILL_ACCESS    0x80000000
  71
  72 /* Define some IRQ masks */
  73 /* This is the mask used at reset by the chip */
  74 #define TMIO_MASK_ALL           0x837f031d
  75 #define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND | \
  76                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  77 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND | \
  78                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  79 #define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
  80                 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
  81 #define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
  82
  83 #define enable_mmc_irqs(ctl, i) \
  84         do { \
  85                 u32 mask;\
  86                 mask  = tmio_ioread32((ctl) + CTL_IRQ_MASK); \
  87                 mask &= ~((i) & TMIO_MASK_IRQ); \
  88                 tmio_iowrite32(mask, (ctl) + CTL_IRQ_MASK); \
  89         } while (0)
  90
  91 #define disable_mmc_irqs(ctl, i) \
  92         do { \
  93                 u32 mask;\
  94                 mask  = tmio_ioread32((ctl) + CTL_IRQ_MASK); \
  95                 mask |= ((i) & TMIO_MASK_IRQ); \
  96                 tmio_iowrite32(mask, (ctl) + CTL_IRQ_MASK); \
  97         } while (0)
  98
  99 #define ack_mmc_irqs(ctl, i) \
 100         do { \
 101                 u32 mask;\
 102                 mask  = tmio_ioread32((ctl) + CTL_STATUS); \
 103                 mask &= ~((i) & TMIO_MASK_IRQ); \
 104                 tmio_iowrite32(mask, (ctl) + CTL_STATUS); \
 105         } while (0)
 106
 107
 108 struct tmio_mmc_host {
 109         void __iomem *cnf;
 110         void __iomem *ctl;
 111         struct mmc_command      *cmd;
 112         struct mmc_request      *mrq;
 113         struct mmc_data         *data;
 114         struct mmc_host         *mmc;
 115         int                     irq;
 116
 117         /* pio related stuff */
 118         struct scatterlist      *sg_ptr;
 119         unsigned int            sg_len;
 120         unsigned int            sg_off;
 121 };
 122
 123 #include <linux/scatterlist.h>
 124 #include <linux/blkdev.h>
 125
 126 static inline void tmio_mmc_init_sg(struct tmio_mmc_host *host,
 127         struct mmc_data *data)
 128 {
 129         host->sg_len = data->sg_len;
 130         host->sg_ptr = data->sg;
 131         host->sg_off = 0;
 132 }
 133
 134 static inline int tmio_mmc_next_sg(struct tmio_mmc_host *host)
 135 {
 136         host->sg_ptr = sg_next(host->sg_ptr);
 137         host->sg_off = 0;
 138         return --host->sg_len;
 139 }
 140
 141 static inline char *tmio_mmc_kmap_atomic(struct tmio_mmc_host *host,
 142         unsigned long *flags)
 143 {
 144         struct scatterlist *sg = host->sg_ptr;
 145
 146         local_irq_save(*flags);
 147         return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
 148 }
 149
 150 static inline void tmio_mmc_kunmap_atomic(struct tmio_mmc_host *host,
 151         unsigned long *flags)
 152 {
 153         kunmap_atomic(sg_page(host->sg_ptr), KM_BIO_SRC_IRQ);
 154         local_irq_restore(*flags);
 155 }
 156
 157 #ifdef CONFIG_MMC_DEBUG
 158
 159 #define STATUS_TO_TEXT(a) \
 160         do { \
 161                 if (status & TMIO_STAT_##a) \
 162                         printk(#a); \
 163         } while (0)
 164
 165 void pr_debug_status(u32 status)
 166 {
 167         printk(KERN_DEBUG "status: %08x = ", status);
 168         STATUS_TO_TEXT(CARD_REMOVE);
 169         STATUS_TO_TEXT(CARD_INSERT);
 170         STATUS_TO_TEXT(SIGSTATE);
 171         STATUS_TO_TEXT(WRPROTECT);
 172         STATUS_TO_TEXT(CARD_REMOVE_A);
 173         STATUS_TO_TEXT(CARD_INSERT_A);
 174         STATUS_TO_TEXT(SIGSTATE_A);
 175         STATUS_TO_TEXT(CMD_IDX_ERR);
 176         STATUS_TO_TEXT(STOPBIT_ERR);
 177         STATUS_TO_TEXT(ILL_FUNC);
 178         STATUS_TO_TEXT(CMD_BUSY);
 179         STATUS_TO_TEXT(CMDRESPEND);
 180         STATUS_TO_TEXT(DATAEND);
 181         STATUS_TO_TEXT(CRCFAIL);
 182         STATUS_TO_TEXT(DATATIMEOUT);
 183         STATUS_TO_TEXT(CMDTIMEOUT);
 184         STATUS_TO_TEXT(RXOVERFLOW);
 185         STATUS_TO_TEXT(TXUNDERRUN);
 186         STATUS_TO_TEXT(RXRDY);
 187         STATUS_TO_TEXT(TXRQ);
 188         STATUS_TO_TEXT(ILL_ACCESS);
 189         printk("\n");
 190 }
 191
 192 #else
 193 #define pr_debug_status(s)  do { } while (0)
 194 #endif