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