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linux-mmc.h

/*
 *  linux/include/linux/mmc/mmc.h
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef MMC_H
#define MMC_H

/* removed by scsuh */
#if 0
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/device.h>

struct request;
struct mmc_data;
struct mmc_request;
#endif

#define MMC_RSP_PRESENT (1 << 0)
#define MMC_RSP_136     (1 << 1)          /* 136 bit response */
#define MMC_RSP_CRC     (1 << 2)          /* expect valid crc */
#define MMC_RSP_BUSY    (1 << 3)          /* card may send busy */
#define MMC_RSP_OPCODE  (1 << 4)          /* response contains opcode */
#define MMC_CMD_MASK    (3 << 5)          /* command type */
#define MMC_CMD_AC      (0 << 5)
#define MMC_CMD_ADTC    (1 << 5)
#define MMC_CMD_BC      (2 << 5)
#define MMC_CMD_BCR     (3 << 5)

/*
 * These are the response types, and correspond to valid bit
 * patterns of the above flags.  One additional valid pattern
 * is all zeros, which means we don't expect a response.
 */
#define MMC_RSP_NONE    (0)
#define MMC_RSP_R1      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R1B     (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
#define MMC_RSP_R2      (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
#define MMC_RSP_R3      (MMC_RSP_PRESENT)
#define MMC_RSP_R6      (MMC_RSP_PRESENT|MMC_RSP_CRC)

#define mmc_resp_type(cmd)    ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))

/*
 * These are the command types.
 */
#define mmc_cmd_type(cmd)     ((cmd)->flags & MMC_CMD_MASK)

#define MMC_ERR_NONE    0
#define MMC_ERR_TIMEOUT 1
#define MMC_ERR_BADCRC  2
#define MMC_ERR_FIFO    3
#define MMC_ERR_FAILED  4
#define MMC_ERR_INVALID 5

00059 struct mmc_command {
      u32               opcode;
      u32               arg;
      u32               resp[4];
      unsigned int            flags;            /* expected response type */
      struct mmc_data         *data;            /* data segment associated with cmd */
      struct mmc_request      *mrq;       /* associated request */
      unsigned int            retries;    /* max number of retries */
      unsigned int            error;            /* command error */

};

00071 struct mmc_data {
      unsigned int            timeout_ns; /* data timeout (in ns, max 80ms) */
      unsigned int            timeout_clks;     /* data timeout (in clocks) */
      unsigned int            blksz_bits; /* data block size */
      unsigned int            blksz;            /* data block size */
      unsigned int            blocks;           /* number of blocks */
      unsigned int            error;            /* data error */
      unsigned int            flags;

#define MMC_DATA_WRITE  (1 << 8)
#define MMC_DATA_READ   (1 << 9)
#define MMC_DATA_STREAM (1 << 10)
#define MMC_DATA_MULTI  (1 << 11)

      unsigned int            bytes_xfered;

      struct mmc_command      *stop;            /* stop command */
      struct mmc_request      *mrq;       /* associated request */

      unsigned int            sg_len;           /* size of scatter list */
      struct scatterlist      *sg;        /* I/O scatter list */
};

00094 struct mmc_request {
      struct mmc_command      *cmd;
      struct mmc_data         *data;
      struct mmc_command      *stop;

      void              *done_data; /* completion data */
      void              (*done)(struct mmc_request *);/* completion function */
};

struct mmc_host;
struct mmc_card;

extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int,
      struct mmc_command *, int);

extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card);

static inline void mmc_claim_host(struct mmc_host *host)
{
      __mmc_claim_host(host, (struct mmc_card *)-1);
}

extern void mmc_release_host(struct mmc_host *host);

#endif

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