102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
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/*
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* linux/include/linux/mmc/mmc.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef MMC_H
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#define MMC_H
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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struct request;
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struct mmc_data;
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struct mmc_request;
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struct mmc_command {
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u32 opcode;
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u32 arg;
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u32 resp[4];
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unsigned int flags; /* expected response type */
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#define MMC_RSP_NONE (0 << 0)
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#define MMC_RSP_SHORT (1 << 0)
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#define MMC_RSP_LONG (2 << 0)
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#define MMC_RSP_MASK (3 << 0)
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#define MMC_RSP_CRC (1 << 3) /* expect valid crc */
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#define MMC_RSP_BUSY (1 << 4) /* card may send busy */
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/*
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* These are the response types, and correspond to valid bit
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* patterns of the above flags. One additional valid pattern
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* is all zeros, which means we don't expect a response.
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*/
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#define MMC_RSP_R1 (MMC_RSP_SHORT|MMC_RSP_CRC)
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#define MMC_RSP_R1B (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_BUSY)
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#define MMC_RSP_R2 (MMC_RSP_LONG|MMC_RSP_CRC)
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#define MMC_RSP_R3 (MMC_RSP_SHORT)
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#define MMC_RSP_R6 (MMC_RSP_SHORT|MMC_RSP_CRC)
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unsigned int retries; /* max number of retries */
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unsigned int error; /* command error */
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#define MMC_ERR_NONE 0
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#define MMC_ERR_TIMEOUT 1
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#define MMC_ERR_BADCRC 2
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#define MMC_ERR_FIFO 3
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#define MMC_ERR_FAILED 4
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#define MMC_ERR_INVALID 5
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struct mmc_data *data; /* data segment associated with cmd */
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struct mmc_request *mrq; /* assoicated request */
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};
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struct mmc_data {
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unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
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unsigned int timeout_clks; /* data timeout (in clocks) */
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unsigned int blksz_bits; /* data block size */
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unsigned int blocks; /* number of blocks */
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unsigned int error; /* data error */
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unsigned int flags;
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#define MMC_DATA_WRITE (1 << 8)
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#define MMC_DATA_READ (1 << 9)
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#define MMC_DATA_STREAM (1 << 10)
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unsigned int bytes_xfered;
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struct mmc_command *stop; /* stop command */
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struct mmc_request *mrq; /* assoicated request */
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unsigned int sg_len; /* size of scatter list */
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struct scatterlist *sg; /* I/O scatter list */
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};
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struct mmc_request {
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struct mmc_command *cmd;
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struct mmc_data *data;
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struct mmc_command *stop;
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void *done_data; /* completion data */
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void (*done)(struct mmc_request *);/* completion function */
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};
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struct mmc_host;
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struct mmc_card;
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extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
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extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
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extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card);
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static inline void mmc_claim_host(struct mmc_host *host)
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{
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__mmc_claim_host(host, (struct mmc_card *)-1);
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}
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extern void mmc_release_host(struct mmc_host *host);
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#endif
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