package/uboot-xburst/files/cpu/mips/jz_mmc.h

   1 /*
   2  *  linux/drivers/mmc/jz_mmc.h
   3  *
   4  *  Author: Vladimir Shebordaev, Igor Oblakov
   5  *  Copyright:  MontaVista Software Inc.
   6  *
   7  *  $Id: jz_mmc.h,v 1.3 2007-06-15 08:04:20 jlwei Exp $
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as
  11  *  published by the Free Software Foundation.
  12  */
  13 #ifndef __MMC_JZMMC_H__
  14 #define __MMC_JZMMC_H__
  15
  16 #include "mmc_protocol.h"
  17
  18 #define MMC_DEBUG_LEVEL         0               /* Enable Debug: 0 - no debug */
  19
  20 #define MMC_BLOCK_SIZE          512             /* MMC/SD Block Size */
  21
  22 #define ID_TO_RCA(x) ((x)+1)
  23
  24 #define MMC_OCR_ARG             0x00ff8000      /* Argument of OCR */
  25
  26 enum mmc_result_t {
  27         MMC_NO_RESPONSE        = -1,
  28         MMC_NO_ERROR           = 0,
  29         MMC_ERROR_OUT_OF_RANGE,
  30         MMC_ERROR_ADDRESS,
  31         MMC_ERROR_BLOCK_LEN,
  32         MMC_ERROR_ERASE_SEQ,
  33         MMC_ERROR_ERASE_PARAM,
  34         MMC_ERROR_WP_VIOLATION,
  35         MMC_ERROR_CARD_IS_LOCKED,
  36         MMC_ERROR_LOCK_UNLOCK_FAILED,
  37         MMC_ERROR_COM_CRC,
  38         MMC_ERROR_ILLEGAL_COMMAND,
  39         MMC_ERROR_CARD_ECC_FAILED,
  40         MMC_ERROR_CC,
  41         MMC_ERROR_GENERAL,
  42         MMC_ERROR_UNDERRUN,
  43         MMC_ERROR_OVERRUN,
  44         MMC_ERROR_CID_CSD_OVERWRITE,
  45         MMC_ERROR_STATE_MISMATCH,
  46         MMC_ERROR_HEADER_MISMATCH,
  47         MMC_ERROR_TIMEOUT,
  48         MMC_ERROR_CRC,
  49         MMC_ERROR_DRIVER_FAILURE,
  50 };
  51
  52 /* the information structure of MMC/SD Card */
  53 typedef struct MMC_INFO
  54 {
  55         int             id;     /* Card index */
  56         int             sd;     /* MMC or SD card */
  57         int             rca;    /* RCA */
  58         u32             scr;    /* SCR 63:32*/
  59         int             flags;  /* Ejected, inserted */
  60         enum card_state state;  /* empty, ident, ready, whatever */
  61
  62         /* Card specific information */
  63         struct mmc_cid  cid;
  64         struct mmc_csd  csd;
  65         u32             block_num;
  66         u32             block_len;
  67         u32             erase_unit;
  68 } mmc_info;
  69
  70 mmc_info mmcinfo;
  71
  72 struct mmc_request {
  73         int               index;      /* Slot index - used for CS lines */
  74         int               cmd;        /* Command to send */
  75         u32               arg;        /* Argument to send */
  76         enum mmc_rsp_t    rtype;      /* Response type expected */
  77
  78         /* Data transfer (these may be modified at the low level) */
  79         u16               nob;        /* Number of blocks to transfer*/
  80         u16               block_len;  /* Block length */
  81         u8               *buffer;     /* Data buffer */
  82         u32               cnt;        /* Data length, for PIO */
  83
  84         /* Results */
  85         u8                response[18]; /* Buffer to store response - CRC is optional */
  86         enum mmc_result_t result;
  87 };
  88
  89 char * mmc_result_to_string(int);
  90 int    mmc_unpack_csd(struct mmc_request *request, struct mmc_csd *csd);
  91 int    mmc_unpack_r1(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state);
  92 int    mmc_unpack_r6(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state, int *rca);
  93 int    mmc_unpack_scr(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state, u32 *scr);
  94 int    mmc_unpack_cid(struct mmc_request *request, struct mmc_cid *cid);
  95 int    mmc_unpack_r3(struct mmc_request *request, struct mmc_response_r3 *r3);
  96
  97 void   mmc_send_cmd(struct mmc_request *request, int cmd, u32 arg,
  98                      u16 nob, u16 block_len, enum mmc_rsp_t rtype, u8 *buffer);
  99 u32    mmc_tran_speed(u8 ts);
 100 void   jz_mmc_set_clock(int sd, u32 rate);
 101 void   jz_mmc_hardware_init(void);
 102
 103 static inline void mmc_simple_cmd(struct mmc_request *request, int cmd, u32 arg, enum mmc_rsp_t rtype)
 104 {
 105         mmc_send_cmd( request, cmd, arg, 0, 0, rtype, 0);
 106 }
 107
 108 int mmc_legacy_init(int verbose);
 109 int mmc_read(ulong src, uchar *dst, int size);
 110 int mmc_write(uchar *src, ulong dst, int size);
 111 int mmc2info(ulong addr);
 112
 113 #endif /* __MMC_JZMMC_H__ */