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 #define MMCICLOCK               0x004
  18 #define MCI_CLK_ENABLE          (1 << 8)
  19 #define MCI_CLK_PWRSAVE         (1 << 9)
  20 #define MCI_CLK_BYPASS          (1 << 10)
  21
  22 #define MMCIARGUMENT            0x008
  23 #define MMCICOMMAND             0x00c
  24 #define MCI_CPSM_RESPONSE       (1 << 6)
  25 #define MCI_CPSM_LONGRSP        (1 << 7)
  26 #define MCI_CPSM_INTERRUPT      (1 << 8)
  27 #define MCI_CPSM_PENDING        (1 << 9)
  28 #define MCI_CPSM_ENABLE         (1 << 10)
  29
  30 #define MMCIRESPCMD             0x010
  31 #define MMCIRESPONSE0           0x014
  32 #define MMCIRESPONSE1           0x018
  33 #define MMCIRESPONSE2           0x01c
  34 #define MMCIRESPONSE3           0x020
  35 #define MMCIDATATIMER           0x024
  36 #define MMCIDATALENGTH          0x028
  37 #define MMCIDATACTRL            0x02c
  38 #define MCI_DPSM_ENABLE         (1 << 0)
  39 #define MCI_DPSM_DIRECTION      (1 << 1)
  40 #define MCI_DPSM_MODE           (1 << 2)
  41 #define MCI_DPSM_DMAENABLE      (1 << 3)
  42
  43 #define MMCIDATACNT             0x030
  44 #define MMCISTATUS              0x034
  45 #define MCI_CMDCRCFAIL          (1 << 0)
  46 #define MCI_DATACRCFAIL         (1 << 1)
  47 #define MCI_CMDTIMEOUT          (1 << 2)
  48 #define MCI_DATATIMEOUT         (1 << 3)
  49 #define MCI_TXUNDERRUN          (1 << 4)
  50 #define MCI_RXOVERRUN           (1 << 5)
  51 #define MCI_CMDRESPEND          (1 << 6)
  52 #define MCI_CMDSENT             (1 << 7)
  53 #define MCI_DATAEND             (1 << 8)
  54 #define MCI_DATABLOCKEND        (1 << 10)
  55 #define MCI_CMDACTIVE           (1 << 11)
  56 #define MCI_TXACTIVE            (1 << 12)
  57 #define MCI_RXACTIVE            (1 << 13)
  58 #define MCI_TXFIFOHALFEMPTY     (1 << 14)
  59 #define MCI_RXFIFOHALFFULL      (1 << 15)
  60 #define MCI_TXFIFOFULL          (1 << 16)
  61 #define MCI_RXFIFOFULL          (1 << 17)
  62 #define MCI_TXFIFOEMPTY         (1 << 18)
  63 #define MCI_RXFIFOEMPTY         (1 << 19)
  64 #define MCI_TXDATAAVLBL         (1 << 20)
  65 #define MCI_RXDATAAVLBL         (1 << 21)
  66
  67 #define MMCICLEAR               0x038
  68 #define MCI_CMDCRCFAILCLR       (1 << 0)
  69 #define MCI_DATACRCFAILCLR      (1 << 1)
  70 #define MCI_CMDTIMEOUTCLR       (1 << 2)
  71 #define MCI_DATATIMEOUTCLR      (1 << 3)
  72 #define MCI_TXUNDERRUNCLR       (1 << 4)
  73 #define MCI_RXOVERRUNCLR        (1 << 5)
  74 #define MCI_CMDRESPENDCLR       (1 << 6)
  75 #define MCI_CMDSENTCLR          (1 << 7)
  76 #define MCI_DATAENDCLR          (1 << 8)
  77 #define MCI_DATABLOCKENDCLR     (1 << 10)
  78
  79 #define MMCIMASK0               0x03c
  80 #define MCI_CMDCRCFAILMASK      (1 << 0)
  81 #define MCI_DATACRCFAILMASK     (1 << 1)
  82 #define MCI_CMDTIMEOUTMASK      (1 << 2)
  83 #define MCI_DATATIMEOUTMASK     (1 << 3)
  84 #define MCI_TXUNDERRUNMASK      (1 << 4)
  85 #define MCI_RXOVERRUNMASK       (1 << 5)
  86 #define MCI_CMDRESPENDMASK      (1 << 6)
  87 #define MCI_CMDSENTMASK         (1 << 7)
  88 #define MCI_DATAENDMASK         (1 << 8)
  89 #define MCI_DATABLOCKENDMASK    (1 << 10)
  90 #define MCI_CMDACTIVEMASK       (1 << 11)
  91 #define MCI_TXACTIVEMASK        (1 << 12)
  92 #define MCI_RXACTIVEMASK        (1 << 13)
  93 #define MCI_TXFIFOHALFEMPTYMASK (1 << 14)
  94 #define MCI_RXFIFOHALFFULLMASK  (1 << 15)
  95 #define MCI_TXFIFOFULLMASK      (1 << 16)
  96 #define MCI_RXFIFOFULLMASK      (1 << 17)
  97 #define MCI_TXFIFOEMPTYMASK     (1 << 18)
  98 #define MCI_RXFIFOEMPTYMASK     (1 << 19)
  99 #define MCI_TXDATAAVLBLMASK     (1 << 20)
 100 #define MCI_RXDATAAVLBLMASK     (1 << 21)
 101
 102 #define MMCIMASK1               0x040
 103 #define MMCIFIFOCNT             0x048
 104 #define MMCIFIFO                0x080 /* to 0x0bc */
 105
 106 #define MCI_IRQENABLE   \
 107         (MCI_CMDCRCFAILMASK|MCI_DATACRCFAILMASK|MCI_CMDTIMEOUTMASK|     \
 108         MCI_DATATIMEOUTMASK|MCI_TXUNDERRUNMASK|MCI_RXOVERRUNMASK|       \
 109         MCI_CMDRESPENDMASK|MCI_CMDSENTMASK|MCI_DATABLOCKENDMASK)
 110
 111 /*
 112  * The size of the FIFO in bytes.
 113  */
 114 #define MCI_FIFOSIZE    (16*4)
 115
 116 #define MCI_FIFOHALFSIZE (MCI_FIFOSIZE / 2)
 117
 118 #define NR_SG           16
 119
 120 struct clk;
 121
 122 struct mmci_host {
 123         void __iomem            *base;
 124         struct mmc_request      *mrq;
 125         struct mmc_command      *cmd;
 126         struct mmc_data         *data;
 127         struct mmc_host         *mmc;
 128         struct clk              *clk;
 129
 130         unsigned int            data_xfered;
 131
 132         spinlock_t              lock;
 133
 134         unsigned int            mclk;
 135         unsigned int            cclk;
 136         u32                     pwr;
 137         struct mmc_platform_data *plat;
 138
 139         struct timer_list       timer;
 140         unsigned int            oldstat;
 141
 142         unsigned int            sg_len;
 143
 144         /* pio stuff */
 145         struct scatterlist      *sg_ptr;
 146         unsigned int            sg_off;
 147         unsigned int            size;
 148 };
 149
 150 static inline void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
 151 {
 152         /*
 153          * Ideally, we want the higher levels to pass us a scatter list.
 154          */
 155         host->sg_len = data->sg_len;
 156         host->sg_ptr = data->sg;
 157         host->sg_off = 0;
 158 }
 159
 160 static inline int mmci_next_sg(struct mmci_host *host)
 161 {
 162         host->sg_ptr++;
 163         host->sg_off = 0;
 164         return --host->sg_len;
 165 }
 166
 167 static inline char *mmci_kmap_atomic(struct mmci_host *host, unsigned long *flags)
 168 {
 169         struct scatterlist *sg = host->sg_ptr;
 170
 171         local_irq_save(*flags);
 172         return kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset;
 173 }
 174
 175 static inline void mmci_kunmap_atomic(struct mmci_host *host, void *buffer, unsigned long *flags)
 176 {
 177         kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
 178         local_irq_restore(*flags);
 179 }