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177 lines
5.8 KiB
C
177 lines
5.8 KiB
C
/*
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* linux/drivers/mmc/jz_mmc.h
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*
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* Author: Vladimir Shebordaev, Igor Oblakov
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* Copyright: MontaVista Software Inc.
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*
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* $Id: jz_mmc.h,v 1.3 2007-06-15 08:04:20 jlwei Exp $
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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_JZMMC_H__
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#define __MMC_JZMMC_H__
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#define ID_TO_RCA(x) ((x)+1)
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#define MMC_OCR_ARG 0x00ff8000 /* Argument of OCR */
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/* Standard MMC/SD clock speeds */
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#define MMC_CLOCK_SLOW 400000 /* 400 kHz for initial setup */
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#define MMC_CLOCK_FAST 20000000 /* 20 MHz for maximum for normal operation */
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#define SD_CLOCK_FAST 24000000 /* 24 MHz for SD Cards */
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/* Use negative numbers to disambiguate */
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#define MMC_CIM_RESET -1
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#define SET_BUS_WIDTH 6 /* ac [1:0] bus width R1 */
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#define R1_OUT_OF_RANGE (1 << 31) /* er, c */
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#define R1_ADDRESS_ERROR (1 << 30) /* erx, c */
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#define R1_BLOCK_LEN_ERROR (1 << 29) /* er, c */
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#define R1_ERASE_SEQ_ERROR (1 << 28) /* er, c */
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#define R1_ERASE_PARAM (1 << 27) /* ex, c */
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#define R1_WP_VIOLATION (1 << 26) /* erx, c */
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#define R1_CARD_IS_LOCKED (1 << 25) /* sx, a */
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#define R1_LOCK_UNLOCK_FAILED (1 << 24) /* erx, c */
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#define R1_COM_CRC_ERROR (1 << 23) /* er, b */
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#define R1_ILLEGAL_COMMAND (1 << 22) /* er, b */
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#define R1_CARD_ECC_FAILED (1 << 21) /* ex, c */
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#define R1_CC_ERROR (1 << 20) /* erx, c */
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#define R1_ERROR (1 << 19) /* erx, c */
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#define R1_UNDERRUN (1 << 18) /* ex, c */
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#define R1_OVERRUN (1 << 17) /* ex, c */
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#define R1_CID_CSD_OVERWRITE (1 << 16) /* erx, c, CID/CSD overwrite */
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#define R1_WP_ERASE_SKIP (1 << 15) /* sx, c */
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#define R1_CARD_ECC_DISABLED (1 << 14) /* sx, a */
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#define R1_ERASE_RESET (1 << 13) /* sr, c */
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#define R1_STATUS(x) (x & 0xFFFFE000)
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#define MMC_CARD_BUSY 0x80000000 /* Card Power up status bit */
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#define MMC_PROGRAM_CID 26 /* adtc R1 */
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#define MMC_PROGRAM_CSD 27 /* adtc R1 */
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#define MMC_GO_IRQ_STATE 40 /* bcr R5 */
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#define MMC_GEN_CMD 56 /* adtc [0] RD/WR R1b */
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#define MMC_LOCK_UNLOCK 42 /* adtc R1b */
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#define MMC_WRITE_DAT_UNTIL_STOP 20 /* adtc [31:0] data addr R1 */
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#define MMC_READ_DAT_UNTIL_STOP 11 /* adtc [31:0] dadr R1 */
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#define MMC_SEND_WRITE_PROT 30 /* adtc [31:0] wpdata addr R1 */
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enum mmc_result_t {
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MMC_NO_RESPONSE = -1,
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MMC_NO_ERROR = 0,
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MMC_ERROR_OUT_OF_RANGE,
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MMC_ERROR_ADDRESS,
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MMC_ERROR_BLOCK_LEN,
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MMC_ERROR_ERASE_SEQ,
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MMC_ERROR_ERASE_PARAM,
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MMC_ERROR_WP_VIOLATION,
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MMC_ERROR_CARD_IS_LOCKED,
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MMC_ERROR_LOCK_UNLOCK_FAILED,
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MMC_ERROR_COM_CRC,
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MMC_ERROR_ILLEGAL_COMMAND,
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MMC_ERROR_CARD_ECC_FAILED,
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MMC_ERROR_CC,
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MMC_ERROR_GENERAL,
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MMC_ERROR_UNDERRUN,
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MMC_ERROR_OVERRUN,
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MMC_ERROR_CID_CSD_OVERWRITE,
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MMC_ERROR_STATE_MISMATCH,
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MMC_ERROR_HEADER_MISMATCH,
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MMC_ERROR_TIMEOUT,
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MMC_ERROR_CRC,
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MMC_ERROR_DRIVER_FAILURE,
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};
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enum card_state {
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CARD_STATE_EMPTY = -1,
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CARD_STATE_IDLE = 0,
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CARD_STATE_READY = 1,
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CARD_STATE_IDENT = 2,
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CARD_STATE_STBY = 3,
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CARD_STATE_TRAN = 4,
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CARD_STATE_DATA = 5,
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CARD_STATE_RCV = 6,
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CARD_STATE_PRG = 7,
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CARD_STATE_DIS = 8,
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};
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enum mmc_rsp_t {
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RESPONSE_NONE = 0,
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RESPONSE_R1 = 1,
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RESPONSE_R1B = 2,
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RESPONSE_R2_CID = 3,
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RESPONSE_R2_CSD = 4,
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RESPONSE_R3 = 5,
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RESPONSE_R4 = 6,
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RESPONSE_R5 = 7,
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RESPONSE_R6 = 8,
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};
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struct mmc_response_r1 {
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u8 cmd;
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u32 status;
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};
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struct mmc_response_r3 {
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u32 ocr;
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};
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/* the information structure of MMC/SD Card */
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struct mmc_info {
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int id; /* Card index */
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int sd; /* MMC or SD card */
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int rca; /* RCA */
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u32 scr; /* SCR 63:32*/
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int flags; /* Ejected, inserted */
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enum card_state state; /* empty, ident, ready, whatever */
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/* Card specific information */
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struct mmc_cid cid;
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struct mmc_csd csd;
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u32 block_num;
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u32 block_len;
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u32 erase_unit;
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};
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struct mmc_info mmcinfo;
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struct mmc_request {
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int index; /* Slot index - used for CS lines */
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int cmd; /* Command to send */
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u32 arg; /* Argument to send */
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enum mmc_rsp_t rtype; /* Response type expected */
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/* Data transfer (these may be modified at the low level) */
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u16 nob; /* Number of blocks to transfer*/
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u16 block_len; /* Block length */
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u8 *buffer; /* Data buffer */
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u32 cnt; /* Data length, for PIO */
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/* Results */
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u8 response[18]; /* Buffer to store response - CRC is optional */
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enum mmc_result_t result;
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};
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char * mmc_result_to_string(int);
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int mmc_unpack_csd(struct mmc_request *request, struct mmc_csd *csd);
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int mmc_unpack_r1(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state);
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int mmc_unpack_r6(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state, int *rca);
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int mmc_unpack_scr(struct mmc_request *request, struct mmc_response_r1 *r1, enum card_state state, u32 *scr);
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int mmc_unpack_cid(struct mmc_request *request, struct mmc_cid *cid);
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int mmc_unpack_r3(struct mmc_request *request, struct mmc_response_r3 *r3);
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void mmc_send_cmd(struct mmc_request *request, int cmd, u32 arg,
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u16 nob, u16 block_len, enum mmc_rsp_t rtype, u8 *buffer);
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u32 mmc_tran_speed(u8 ts);
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void jz_mmc_set_clock(int sd, u32 rate);
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static inline void mmc_simple_cmd(struct mmc_request *request, int cmd, u32 arg, enum mmc_rsp_t rtype)
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{
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mmc_send_cmd( request, cmd, arg, 0, 0, rtype, 0);
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}
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#endif /* __MMC_JZMMC_H__ */
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