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rockbox/firmware/target/mips/ingenic_jz47xx/ata-sd-jz4740.c
Maurus Cuelenaere 4af26e7e98 Onda VX747: 
* Commit (premature) SD, USB & audio drivers
 * Fix ramdisk.c mistake
 * Add battery readout


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19011 a1c6a512-1295-4272-9138-f99709370657
2008-11-05 00:24:46 +00:00

1168 lines
35 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "jz4740.h"
#include "ata.h"
#include "ata-sd-target.h"
#include "system.h"
#include "kernel.h"
#include "panic.h"
#include "debug.h"
static struct wakeup sd_wakeup;
//#define MMC_DMA_ENABLE
#define MMC_DMA_INTERRUPT 0
//#define DEBUG(x...) DEBUGF(x);
#define DEBUG(x...) printf(x);
#define MMC_CD_PIN (29 + 1 * 32) /* Pin to check card insertion */
#define MMC_POWER_PIN (30 + 1 * 32) /* Pin to enable/disable card power */
//#define MMC_PW_PIN (14 + 3 * 32) /* Pin to check protect card */
#define MMC_POWER_OFF() \
do { \
__gpio_set_pin(MMC_POWER_PIN); \
} while (0)
#define MMC_POWER_ON() \
do { \
__gpio_clear_pin(MMC_POWER_PIN); \
} while (0)
#define MMC_INSERT_STATUS() __gpio_get_pin(MMC_CD_PIN)
#define MMC_RESET() __msc_reset()
#define MMC_IRQ_MASK() \
do { \
REG_MSC_IMASK = 0xffff; \
REG_MSC_IREG = 0xffff; \
} while (0)
static inline void mmc_init_gpio(void)
{
__gpio_as_msc();
#ifdef MMC_POWER_PIN
__gpio_as_output(MMC_POWER_PIN);
__gpio_disable_pull(MMC_POWER_PIN);
__gpio_set_pin(MMC_POWER_PIN);
#endif
#ifdef MMC_CD_PIN
__gpio_as_input(MMC_CD_PIN);
__gpio_disable_pull(MMC_CD_PIN);
#endif
#ifdef MMC_PW_PIN
__gpio_as_input(MMC_PW_PIN);
__gpio_disable_pull(MMC_PW_PIN);
#endif
}
/* Error codes */
enum mmc_result_t
{
MMC_NO_RESPONSE = -1,
MMC_NO_ERROR = 0,
MMC_ERROR_OUT_OF_RANGE,
MMC_ERROR_ADDRESS,
MMC_ERROR_BLOCK_LEN,
MMC_ERROR_ERASE_SEQ,
MMC_ERROR_ERASE_PARAM,
MMC_ERROR_WP_VIOLATION,
MMC_ERROR_CARD_IS_LOCKED,
MMC_ERROR_LOCK_UNLOCK_FAILED,
MMC_ERROR_COM_CRC,
MMC_ERROR_ILLEGAL_COMMAND,
MMC_ERROR_CARD_ECC_FAILED,
MMC_ERROR_CC,
MMC_ERROR_GENERAL,
MMC_ERROR_UNDERRUN,
MMC_ERROR_OVERRUN,
MMC_ERROR_CID_CSD_OVERWRITE,
MMC_ERROR_STATE_MISMATCH,
MMC_ERROR_HEADER_MISMATCH,
MMC_ERROR_TIMEOUT,
MMC_ERROR_CRC,
MMC_ERROR_DRIVER_FAILURE,
};
/* Standard MMC/SD clock speeds */
#define MMC_CLOCK_SLOW 400000 /* 400 kHz for initial setup */
#define MMC_CLOCK_FAST 20000000 /* 20 MHz for maximum for normal operation */
#define SD_CLOCK_FAST 24000000 /* 24 MHz for SD Cards */
#define SD_CLOCK_HIGH 48000000 /* 48 MHz for SD Cards */
/* Extra MMC commands for state control */
/* Use negative numbers to disambiguate */
#define MMC_CIM_RESET -1
/* Standard MMC commands (3.1) type argument response */
/* class 1 */
#define MMC_GO_IDLE_STATE 0 /* bc */
#define MMC_SEND_OP_COND 1 /* bcr [31:0] OCR R3 */
#define MMC_ALL_SEND_CID 2 /* bcr R2 */
#define MMC_SET_RELATIVE_ADDR 3 /* ac [31:16] RCA R1 */
#define MMC_SET_DSR 4 /* bc [31:16] RCA */
#define MMC_SELECT_CARD 7 /* ac [31:16] RCA R1 */
#define MMC_SEND_CSD 9 /* ac [31:16] RCA R2 */
#define MMC_SEND_CID 10 /* ac [31:16] RCA R2 */
#define MMC_READ_DAT_UNTIL_STOP 11 /* adtc [31:0] dadr R1 */
#define MMC_STOP_TRANSMISSION 12 /* ac R1b */
#define MMC_SEND_STATUS 13 /* ac [31:16] RCA R1 */
#define MMC_GO_INACTIVE_STATE 15 /* ac [31:16] RCA */
/* class 2 */
#define MMC_SET_BLOCKLEN 16 /* ac [31:0] block len R1 */
#define MMC_READ_SINGLE_BLOCK 17 /* adtc [31:0] data addr R1 */
#define MMC_READ_MULTIPLE_BLOCK 18 /* adtc [31:0] data addr R1 */
/* class 3 */
#define MMC_WRITE_DAT_UNTIL_STOP 20 /* adtc [31:0] data addr R1 */
/* class 4 */
#define MMC_SET_BLOCK_COUNT 23 /* adtc [31:0] data addr R1 */
#define MMC_WRITE_BLOCK 24 /* adtc [31:0] data addr R1 */
#define MMC_WRITE_MULTIPLE_BLOCK 25 /* adtc R1 */
#define MMC_PROGRAM_CID 26 /* adtc R1 */
#define MMC_PROGRAM_CSD 27 /* adtc R1 */
/* class 6 */
#define MMC_SET_WRITE_PROT 28 /* ac [31:0] data addr R1b */
#define MMC_CLR_WRITE_PROT 29 /* ac [31:0] data addr R1b */
#define MMC_SEND_WRITE_PROT 30 /* adtc [31:0] wpdata addr R1 */
/* class 5 */
#define MMC_ERASE_GROUP_START 35 /* ac [31:0] data addr R1 */
#define MMC_ERASE_GROUP_END 36 /* ac [31:0] data addr R1 */
#define MMC_ERASE 37 /* ac R1b */
/* class 9 */
#define MMC_FAST_IO 39 /* ac <Complex> R4 */
#define MMC_GO_IRQ_STATE 40 /* bcr R5 */
/* class 7 */
#define MMC_LOCK_UNLOCK 42 /* adtc R1b */
/* class 8 */
#define MMC_APP_CMD 55 /* ac [31:16] RCA R1 */
#define MMC_GEN_CMD 56 /* adtc [0] RD/WR R1b */
/* SD class */
#define SD_SEND_OP_COND 41 /* bcr [31:0] OCR R3 */
#define SET_BUS_WIDTH 6 /* ac [1:0] bus width R1 */
#define SEND_SCR 51 /* adtc [31:0] staff R1 */
/* Don't change the order of these; they are used in dispatch tables */
enum mmc_rsp_t
{
RESPONSE_NONE = 0,
RESPONSE_R1 = 1,
RESPONSE_R1B = 2,
RESPONSE_R2_CID = 3,
RESPONSE_R2_CSD = 4,
RESPONSE_R3 = 5,
RESPONSE_R4 = 6,
RESPONSE_R5 = 7,
RESPONSE_R6 = 8,
};
/*
MMC status in R1
Type
e : error bit
s : status bit
r : detected and set for the actual command response
x : detected and set during command execution. the host must poll
the card by sending status command in order to read these bits.
Clear condition
a : according to the card state
b : always related to the previous command. Reception of
a valid command will clear it (with a delay of one command)
c : clear by read
*/
#define R1_OUT_OF_RANGE (1 << 31) /* er, c */
#define R1_ADDRESS_ERROR (1 << 30) /* erx, c */
#define R1_BLOCK_LEN_ERROR (1 << 29) /* er, c */
#define R1_ERASE_SEQ_ERROR (1 << 28) /* er, c */
#define R1_ERASE_PARAM (1 << 27) /* ex, c */
#define R1_WP_VIOLATION (1 << 26) /* erx, c */
#define R1_CARD_IS_LOCKED (1 << 25) /* sx, a */
#define R1_LOCK_UNLOCK_FAILED (1 << 24) /* erx, c */
#define R1_COM_CRC_ERROR (1 << 23) /* er, b */
#define R1_ILLEGAL_COMMAND (1 << 22) /* er, b */
#define R1_CARD_ECC_FAILED (1 << 21) /* ex, c */
#define R1_CC_ERROR (1 << 20) /* erx, c */
#define R1_ERROR (1 << 19) /* erx, c */
#define R1_UNDERRUN (1 << 18) /* ex, c */
#define R1_OVERRUN (1 << 17) /* ex, c */
#define R1_CID_CSD_OVERWRITE (1 << 16) /* erx, c, CID/CSD overwrite */
#define R1_WP_ERASE_SKIP (1 << 15) /* sx, c */
#define R1_CARD_ECC_DISABLED (1 << 14) /* sx, a */
#define R1_ERASE_RESET (1 << 13) /* sr, c */
#define R1_STATUS(x) (x & 0xFFFFE000)
#define R1_CURRENT_STATE(x) ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */
#define R1_READY_FOR_DATA (1 << 8) /* sx, a */
#define R1_APP_CMD (1 << 7) /* sr, c */
enum card_state
{
CARD_STATE_EMPTY = -1,
CARD_STATE_IDLE = 0,
CARD_STATE_READY = 1,
CARD_STATE_IDENT = 2,
CARD_STATE_STBY = 3,
CARD_STATE_TRAN = 4,
CARD_STATE_DATA = 5,
CARD_STATE_RCV = 6,
CARD_STATE_PRG = 7,
CARD_STATE_DIS = 8,
};
/* These are unpacked versions of the actual responses */
struct mmc_response_r1
{
unsigned char cmd;
unsigned int status;
};
struct mmc_cid
{
unsigned char mid;
unsigned short oid;
unsigned char pnm[7]; /* Product name (we null-terminate) */
unsigned char prv;
unsigned int psn;
unsigned char mdt;
};
struct mmc_csd
{
unsigned char csd_structure;
unsigned char spec_vers;
unsigned char taac;
unsigned char nsac;
unsigned char tran_speed;
unsigned short ccc;
unsigned char read_bl_len;
unsigned char read_bl_partial;
unsigned char write_blk_misalign;
unsigned char read_blk_misalign;
unsigned char dsr_imp;
unsigned short c_size;
unsigned char vdd_r_curr_min;
unsigned char vdd_r_curr_max;
unsigned char vdd_w_curr_min;
unsigned char vdd_w_curr_max;
unsigned char c_size_mult;
union
{
struct /* MMC system specification version 3.1 */
{
unsigned char erase_grp_size;
unsigned char erase_grp_mult;
} v31;
struct /* MMC system specification version 2.2 */
{
unsigned char sector_size;
unsigned char erase_grp_size;
} v22;
} erase;
unsigned char wp_grp_size;
unsigned char wp_grp_enable;
unsigned char default_ecc;
unsigned char r2w_factor;
unsigned char write_bl_len;
unsigned char write_bl_partial;
unsigned char file_format_grp;
unsigned char copy;
unsigned char perm_write_protect;
unsigned char tmp_write_protect;
unsigned char file_format;
unsigned char ecc;
};
struct mmc_response_r3
{
unsigned int ocr;
};
#define MMC_VDD_145_150 0x00000001 /* VDD voltage 1.45 - 1.50 */
#define MMC_VDD_150_155 0x00000002 /* VDD voltage 1.50 - 1.55 */
#define MMC_VDD_155_160 0x00000004 /* VDD voltage 1.55 - 1.60 */
#define MMC_VDD_160_165 0x00000008 /* VDD voltage 1.60 - 1.65 */
#define MMC_VDD_165_170 0x00000010 /* VDD voltage 1.65 - 1.70 */
#define MMC_VDD_17_18 0x00000020 /* VDD voltage 1.7 - 1.8 */
#define MMC_VDD_18_19 0x00000040 /* VDD voltage 1.8 - 1.9 */
#define MMC_VDD_19_20 0x00000080 /* VDD voltage 1.9 - 2.0 */
#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
#define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */
#define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */
#define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */
#define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */
#define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */
#define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */
#define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */
#define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */
#define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */
#define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */
#define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */
#define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */
#define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */
#define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */
#define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
#define MMC_CARD_BUSY 0x80000000 /* Card Power up status bit */
/* CSD field definitions */
#define CSD_STRUCT_VER_1_0 0 /* Valid for system specification 1.0 - 1.2 */
#define CSD_STRUCT_VER_1_1 1 /* Valid for system specification 1.4 - 2.2 */
#define CSD_STRUCT_VER_1_2 2 /* Valid for system specification 3.1 */
#define CSD_SPEC_VER_0 0 /* Implements system specification 1.0 - 1.2 */
#define CSD_SPEC_VER_1 1 /* Implements system specification 1.4 */
#define CSD_SPEC_VER_2 2 /* Implements system specification 2.0 - 2.2 */
#define CSD_SPEC_VER_3 3 /* Implements system specification 3.1 */
/* the information structure of MMC/SD Card */
typedef struct MMC_INFO
{
int id; /* Card index */
int sd; /* MMC or SD card */
int rca; /* RCA */
unsigned int scr; /* SCR 63:32*/
int flags; /* Ejected, inserted */
enum card_state state; /* empty, ident, ready, whatever */
/* Card specific information */
struct mmc_cid cid;
struct mmc_csd csd;
unsigned int block_num;
unsigned int block_len;
unsigned int erase_unit;
} mmc_info;
static mmc_info mmcinfo;
struct mmc_request
{
int index; /* Slot index - used for CS lines */
int cmd; /* Command to send */
unsigned int arg; /* Argument to send */
enum mmc_rsp_t rtype; /* Response type expected */
/* Data transfer (these may be modified at the low level) */
unsigned short nob; /* Number of blocks to transfer*/
unsigned short block_len; /* Block length */
unsigned char *buffer; /* Data buffer */
unsigned int cnt; /* Data length, for PIO */
/* Results */
unsigned char response[18]; /* Buffer to store response - CRC is optional */
enum mmc_result_t result;
};
#define MMC_OCR_ARG 0x00ff8000 /* Argument of OCR */
/***********************************************************************
* MMC Events
*/
#define MMC_EVENT_NONE 0x00 /* No events */
#define MMC_EVENT_RX_DATA_DONE 0x01 /* Rx data done */
#define MMC_EVENT_TX_DATA_DONE 0x02 /* Tx data done */
#define MMC_EVENT_PROG_DONE 0x04 /* Programming is done */
static int use_4bit; /* Use 4-bit data bus */
static int num_6;
static int sd2_0;
/* Stop the MMC clock and wait while it happens */
static inline int jz_mmc_stop_clock(void)
{
int timeout = 1000;
DEBUG("stop MMC clock");
REG_MSC_STRPCL = MSC_STRPCL_CLOCK_CONTROL_STOP;
while (timeout && (REG_MSC_STAT & MSC_STAT_CLK_EN))
{
timeout--;
if (timeout == 0)
{
DEBUG("Timeout on stop clock waiting");
return MMC_ERROR_TIMEOUT;
}
udelay(1);
}
DEBUG("clock off time is %d microsec", timeout);
return MMC_NO_ERROR;
}
/* Start the MMC clock and operation */
static inline int jz_mmc_start_clock(void)
{
REG_MSC_STRPCL =
MSC_STRPCL_CLOCK_CONTROL_START | MSC_STRPCL_START_OP;
return MMC_NO_ERROR;
}
static inline unsigned int jz_mmc_calc_clkrt(int is_sd, unsigned int rate)
{
unsigned int clkrt;
unsigned int clk_src = is_sd ? 24000000 : 20000000;
clkrt = 0;
while (rate < clk_src)
{
clkrt++;
clk_src >>= 1;
}
return clkrt;
}
static int jz_mmc_check_status(struct mmc_request *request)
{
unsigned int status = REG_MSC_STAT;
/* Checking for response or data timeout */
if (status & (MSC_STAT_TIME_OUT_RES | MSC_STAT_TIME_OUT_READ))
{
DEBUG("MMC/SD timeout, MMC_STAT 0x%x CMD %d", status,
request->cmd);
return MMC_ERROR_TIMEOUT;
}
/* Checking for CRC error */
if (status &
(MSC_STAT_CRC_READ_ERROR | MSC_STAT_CRC_WRITE_ERROR |
MSC_STAT_CRC_RES_ERR))
{
DEBUG("MMC/CD CRC error, MMC_STAT 0x%x", status);
return MMC_ERROR_CRC;
}
return MMC_NO_ERROR;
}
/* Obtain response to the command and store it to response buffer */
static void jz_mmc_get_response(struct mmc_request *request)
{
int i;
unsigned char *buf;
unsigned int data;
DEBUG("fetch response for request %d, cmd %d", request->rtype,
request->cmd);
buf = request->response;
request->result = MMC_NO_ERROR;
switch (request->rtype)
{
case RESPONSE_R1:
case RESPONSE_R1B:
case RESPONSE_R6:
case RESPONSE_R3:
case RESPONSE_R4:
case RESPONSE_R5:
{
data = REG_MSC_RES;
buf[0] = (data >> 8) & 0xff;
buf[1] = data & 0xff;
data = REG_MSC_RES;
buf[2] = (data >> 8) & 0xff;
buf[3] = data & 0xff;
data = REG_MSC_RES;
buf[4] = data & 0xff;
DEBUG("request %d, response [%02x %02x %02x %02x %02x]",
request->rtype, buf[0], buf[1], buf[2],
buf[3], buf[4]);
break;
}
case RESPONSE_R2_CID:
case RESPONSE_R2_CSD:
{
for (i = 0; i < 16; i += 2)
{
data = REG_MSC_RES;
buf[i] = (data >> 8) & 0xff;
buf[i + 1] = data & 0xff;
}
DEBUG("request %d, response [", request->rtype);
break;
}
case RESPONSE_NONE:
DEBUG("No response");
break;
default:
DEBUG("unhandled response type for request %d",
request->rtype);
break;
}
}
#ifdef MMC_DMA_ENABLE
static int jz_mmc_receive_data_dma(struct mmc_request *req)
{
int ch = RX_DMA_CHANNEL;
unsigned int size = req->block_len * req->nob;
unsigned char err = 0;
/* flush dcache */
dma_cache_wback_inv((unsigned long) req->buffer, size);
/* setup dma channel */
REG_DMAC_DSAR(ch) = PHYSADDR(MSC_RXFIFO); /* DMA source addr */
REG_DMAC_DTAR(ch) = PHYSADDR((unsigned long) req->buffer); /* DMA dest addr */
REG_DMAC_DTCR(ch) = (size + 3) / 4; /* DMA transfer count */
REG_DMAC_DRSR(ch) = DMAC_DRSR_RS_MSCIN; /* DMA request type */
#if MMC_DMA_INTERRUPT
REG_DMAC_DCMD(ch) =
DMAC_DCMD_DAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 |
DMAC_DCMD_DS_32BIT | DMAC_DCMD_TIE;
REG_DMAC_DCCSR(ch) = DMAC_DCCSR_EN | DMAC_DCCSR_NDES;
OSSemPend(mmc_dma_rx_sem, 100, &err);
#else
REG_DMAC_DCMD(ch) =
DMAC_DCMD_DAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 |
DMAC_DCMD_DS_32BIT;
REG_DMAC_DCCSR(ch) = DMAC_DCCSR_EN | DMAC_DCCSR_NDES;
while (REG_DMAC_DTCR(ch));
#endif
/* clear status and disable channel */
REG_DMAC_DCCSR(ch) = 0;
#if MMC_DMA_INTERRUPT
return (err == OS_NO_ERR);
#else
return 0;
#endif
}
static int jz_mmc_transmit_data_dma(struct mmc_request *req)
{
int ch = TX_DMA_CHANNEL;
unsigned int size = req->block_len * req->nob;
unsigned char err = 0;
/* flush dcache */
dma_cache_wback_inv((unsigned long) req->buffer, size);
/* setup dma channel */
REG_DMAC_DSAR(ch) = PHYSADDR((unsigned long) req->buffer); /* DMA source addr */
REG_DMAC_DTAR(ch) = PHYSADDR(MSC_TXFIFO); /* DMA dest addr */
REG_DMAC_DTCR(ch) = (size + 3) / 4; /* DMA transfer count */
REG_DMAC_DRSR(ch) = DMAC_DRSR_RS_MSCOUT; /* DMA request type */
#if MMC_DMA_INTERRUPT
REG_DMAC_DCMD(ch) =
DMAC_DCMD_SAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 |
DMAC_DCMD_DS_32BIT | DMAC_DCMD_TIE;
REG_DMAC_DCCSR(ch) = DMAC_DCCSR_EN | DMAC_DCCSR_NDES;
OSSemPend(mmc_dma_tx_sem, 100, &err);
#else
REG_DMAC_DCMD(ch) =
DMAC_DCMD_SAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 |
DMAC_DCMD_DS_32BIT;
REG_DMAC_DCCSR(ch) = DMAC_DCCSR_EN | DMAC_DCCSR_NDES;
/* wait for dma completion */
while (REG_DMAC_DTCR(ch));
#endif
/* clear status and disable channel */
REG_DMAC_DCCSR(ch) = 0;
#if MMC_DMA_INTERRUPT
return (err == OS_NO_ERR);
#else
return 0;
#endif
}
#endif /* MMC_DMA_ENABLE */
static int jz_mmc_receive_data(struct mmc_request *req)
{
unsigned int nob = req->nob;
unsigned int wblocklen = (unsigned int) (req->block_len + 3) >> 2; /* length in word */
unsigned char *buf = req->buffer;
unsigned int *wbuf = (unsigned int *) buf;
unsigned int waligned = (((unsigned int) buf & 0x3) == 0); /* word aligned ? */
unsigned int stat, timeout, data, cnt;
for (; nob >= 1; nob--)
{
timeout = 0x3FFFFFF;
while (timeout)
{
timeout--;
stat = REG_MSC_STAT;
if (stat & MSC_STAT_TIME_OUT_READ)
return MMC_ERROR_TIMEOUT;
else if (stat & MSC_STAT_CRC_READ_ERROR)
return MMC_ERROR_CRC;
else if (!(stat & MSC_STAT_DATA_FIFO_EMPTY)
|| (stat & MSC_STAT_DATA_FIFO_AFULL)) {
/* Ready to read data */
break;
}
udelay(1);
}
if (!timeout)
return MMC_ERROR_TIMEOUT;
/* Read data from RXFIFO. It could be FULL or PARTIAL FULL */
DEBUG("Receive Data = %d", wblocklen);
cnt = wblocklen;
while (cnt)
{
data = REG_MSC_RXFIFO;
if (waligned)
*wbuf++ = data;
else
{
*buf++ = (unsigned char) (data >> 0);
*buf++ = (unsigned char) (data >> 8);
*buf++ = (unsigned char) (data >> 16);
*buf++ = (unsigned char) (data >> 24);
}
cnt--;
while (cnt
&& (REG_MSC_STAT &
MSC_STAT_DATA_FIFO_EMPTY));
}
}
return MMC_NO_ERROR;
}
static int jz_mmc_transmit_data(struct mmc_request *req)
{
unsigned int nob = req->nob;
unsigned int wblocklen = (unsigned int) (req->block_len + 3) >> 2; /* length in word */
unsigned char *buf = req->buffer;
unsigned int *wbuf = (unsigned int *) buf;
unsigned int waligned = (((unsigned int) buf & 0x3) == 0); /* word aligned ? */
unsigned int stat, timeout, data, cnt;
for (; nob >= 1; nob--)
{
timeout = 0x3FFFFFF;
while (timeout)
{
timeout--;
stat = REG_MSC_STAT;
if (stat &
(MSC_STAT_CRC_WRITE_ERROR |
MSC_STAT_CRC_WRITE_ERROR_NOSTS))
return MMC_ERROR_CRC;
else if (!(stat & MSC_STAT_DATA_FIFO_FULL))
{
/* Ready to write data */
break;
}
udelay(1);
}
if (!timeout)
return MMC_ERROR_TIMEOUT;
/* Write data to TXFIFO */
cnt = wblocklen;
while (cnt)
{
while (REG_MSC_STAT & MSC_STAT_DATA_FIFO_FULL);
if (waligned)
REG_MSC_TXFIFO = *wbuf++;
else
{
data = *buf++;
data |= *buf++ << 8;
data |= *buf++ << 16;
data |= *buf++ << 24;
REG_MSC_TXFIFO = data;
}
cnt--;
}
}
return MMC_NO_ERROR;
}
/* Set the MMC clock frequency */
static void jz_mmc_set_clock(int sd, unsigned int rate)
{
int clkrt = 0;
sd = sd ? 1 : 0;
jz_mmc_stop_clock();
if(sd2_0)
{
__cpm_select_msc_hs_clk(sd); /* select clock source from CPM */
REG_CPM_CPCCR |= CPM_CPCCR_CE;
REG_MSC_CLKRT = 0;
}
else
{
__cpm_select_msc_clk(sd); /* select clock source from CPM */
REG_CPM_CPCCR |= CPM_CPCCR_CE;
clkrt = jz_mmc_calc_clkrt(sd, rate);
REG_MSC_CLKRT = clkrt;
}
DEBUG("set clock to %u Hz is_sd=%d clkrt=%d", rate, sd, clkrt);
}
/********************************************************************************************************************
** Name: int jz_mmc_exec_cmd()
** Function: send command to the card, and get a response
** Input: struct mmc_request *req: MMC/SD request
** Output: 0: right >0: error code
********************************************************************************************************************/
static int jz_mmc_exec_cmd(struct mmc_request *request)
{
unsigned int cmdat = 0, events = 0;
int retval, timeout = 0x3fffff;
/* Indicate we have no result yet */
request->result = MMC_NO_RESPONSE;
if (request->cmd == MMC_CIM_RESET)
{
/* On reset, 1-bit bus width */
use_4bit = 0;
/* Reset MMC/SD controller */
__msc_reset();
/* On reset, drop MMC clock down */
jz_mmc_set_clock(0, MMC_CLOCK_SLOW);
/* On reset, stop MMC clock */
jz_mmc_stop_clock();
}
if (request->cmd == MMC_SEND_OP_COND)
{
DEBUG("Have a MMC card");
/* always use 1bit for MMC */
use_4bit = 0;
}
if (request->cmd == SET_BUS_WIDTH)
{
if (request->arg == 0x2)
{
DEBUG("Use 4-bit bus width");
use_4bit = 1;
}
else
{
DEBUG("Use 1-bit bus width");
use_4bit = 0;
}
}
/* stop clock */
jz_mmc_stop_clock();
/* mask all interrupts */
//REG_MSC_IMASK = 0xffff;
/* clear status */
REG_MSC_IREG = 0xffff;
/*open interrupt */
REG_MSC_IMASK = (~7);
/* use 4-bit bus width when possible */
if (use_4bit)
cmdat |= MSC_CMDAT_BUS_WIDTH_4BIT;
/* Set command type and events */
switch (request->cmd)
{
/* MMC core extra command */
case MMC_CIM_RESET:
cmdat |= MSC_CMDAT_INIT; /* Initialization sequence sent prior to command */
break;
/* bc - broadcast - no response */
case MMC_GO_IDLE_STATE:
case MMC_SET_DSR:
break;
/* bcr - broadcast with response */
case MMC_SEND_OP_COND:
case MMC_ALL_SEND_CID:
case MMC_GO_IRQ_STATE:
break;
/* adtc - addressed with data transfer */
case MMC_READ_DAT_UNTIL_STOP:
case MMC_READ_SINGLE_BLOCK:
case MMC_READ_MULTIPLE_BLOCK:
case SEND_SCR:
#if defined(MMC_DMA_ENABLE)
cmdat |=
MSC_CMDAT_DATA_EN | MSC_CMDAT_READ | MSC_CMDAT_DMA_EN;
#else
cmdat |= MSC_CMDAT_DATA_EN | MSC_CMDAT_READ;
#endif
events = MMC_EVENT_RX_DATA_DONE;
break;
case 6:
if (num_6 < 2)
{
#if defined(MMC_DMA_ENABLE)
cmdat |=
MSC_CMDAT_DATA_EN | MSC_CMDAT_READ |
MSC_CMDAT_DMA_EN;
#else
cmdat |= MSC_CMDAT_DATA_EN | MSC_CMDAT_READ;
#endif
events = MMC_EVENT_RX_DATA_DONE;
}
break;
case MMC_WRITE_DAT_UNTIL_STOP:
case MMC_WRITE_BLOCK:
case MMC_WRITE_MULTIPLE_BLOCK:
case MMC_PROGRAM_CID:
case MMC_PROGRAM_CSD:
case MMC_SEND_WRITE_PROT:
case MMC_GEN_CMD:
case MMC_LOCK_UNLOCK:
#if defined(MMC_DMA_ENABLE)
cmdat |=
MSC_CMDAT_DATA_EN | MSC_CMDAT_WRITE | MSC_CMDAT_DMA_EN;
#else
cmdat |= MSC_CMDAT_DATA_EN | MSC_CMDAT_WRITE;
#endif
events = MMC_EVENT_TX_DATA_DONE | MMC_EVENT_PROG_DONE;
break;
case MMC_STOP_TRANSMISSION:
events = MMC_EVENT_PROG_DONE;
break;
/* ac - no data transfer */
default:
break;
}
/* Set response type */
switch (request->rtype)
{
case RESPONSE_NONE:
break;
case RESPONSE_R1B:
cmdat |= MSC_CMDAT_BUSY;
/*FALLTHRU*/
case RESPONSE_R1:
cmdat |= MSC_CMDAT_RESPONSE_R1;
break;
case RESPONSE_R2_CID:
case RESPONSE_R2_CSD:
cmdat |= MSC_CMDAT_RESPONSE_R2;
break;
case RESPONSE_R3:
cmdat |= MSC_CMDAT_RESPONSE_R3;
break;
case RESPONSE_R4:
cmdat |= MSC_CMDAT_RESPONSE_R4;
break;
case RESPONSE_R5:
cmdat |= MSC_CMDAT_RESPONSE_R5;
break;
case RESPONSE_R6:
cmdat |= MSC_CMDAT_RESPONSE_R6;
break;
default:
break;
}
/* Set command index */
if (request->cmd == MMC_CIM_RESET)
REG_MSC_CMD = MMC_GO_IDLE_STATE;
else
REG_MSC_CMD = request->cmd;
/* Set argument */
REG_MSC_ARG = request->arg;
/* Set block length and nob */
if (request->cmd == SEND_SCR)
{ /* get SCR from DataFIFO */
REG_MSC_BLKLEN = 8;
REG_MSC_NOB = 1;
}
else
{
REG_MSC_BLKLEN = request->block_len;
REG_MSC_NOB = request->nob;
}
/* Set command */
REG_MSC_CMDAT = cmdat;
DEBUG("Send cmd %d cmdat: %x arg: %x resp %d", request->cmd,
cmdat, request->arg, request->rtype);
/* Start MMC/SD clock and send command to card */
jz_mmc_start_clock();
/* Wait for command completion */
//__intc_unmask_irq(IRQ_MSC);
//wakeup_wait(&sd_wakeup, 100);
while (timeout-- && !(REG_MSC_STAT & MSC_STAT_END_CMD_RES));
if (timeout == 0)
return MMC_ERROR_TIMEOUT;
REG_MSC_IREG = MSC_IREG_END_CMD_RES; /* clear flag */
/* Check for status */
retval = jz_mmc_check_status(request);
if (retval)
return retval;
/* Complete command with no response */
if (request->rtype == RESPONSE_NONE)
return MMC_NO_ERROR;
/* Get response */
jz_mmc_get_response(request);
/* Start data operation */
if (events & (MMC_EVENT_RX_DATA_DONE | MMC_EVENT_TX_DATA_DONE))
{
if (events & MMC_EVENT_RX_DATA_DONE)
{
if (request->cmd == SEND_SCR)
{
/* SD card returns SCR register as data.
MMC core expect it in the response buffer,
after normal response. */
request->buffer =
(unsigned char *) ((unsigned int) request->response + 5);
}
#ifdef MMC_DMA_ENABLE
jz_mmc_receive_data_dma(request);
#else
jz_mmc_receive_data(request);
#endif
}
if (events & MMC_EVENT_TX_DATA_DONE)
{
#ifdef MMC_DMA_ENABLE
jz_mmc_transmit_data_dma(request);
#else
jz_mmc_transmit_data(request);
#endif
}
//__intc_unmask_irq(IRQ_MSC);
//wakeup_wait(&sd_wakeup, 100);
/* Wait for Data Done */
while (!(REG_MSC_IREG & MSC_IREG_DATA_TRAN_DONE));
REG_MSC_IREG = MSC_IREG_DATA_TRAN_DONE; /* clear status */
}
/* Wait for Prog Done event */
if (events & MMC_EVENT_PROG_DONE)
{
//__intc_unmask_irq(IRQ_MSC);
//wakeup_wait(&sd_wakeup, 100);
while (!(REG_MSC_IREG & MSC_IREG_PRG_DONE));
REG_MSC_IREG = MSC_IREG_PRG_DONE; /* clear status */
}
/* Command completed */
return MMC_NO_ERROR; /* return successfully */
}
/*******************************************************************************************************************
** Name: int mmc_chkcard()
** Function: check whether card is insert entirely
** Input: NULL
** Output: 1: insert entirely 0: not insert entirely
********************************************************************************************************************/
static int jz_mmc_chkcard(void)
{
if (MMC_INSERT_STATUS() == 0)
return 1; /* insert entirely */
else
return 0; /* not insert entirely */
}
#if MMC_DMA_INTERRUPT
static void jz_mmc_tx_handler(unsigned int arg)
{
if (__dmac_channel_address_error_detected(arg))
{
DEBUG("%s: DMAC address error.", __FUNCTION__);
__dmac_channel_clear_address_error(arg);
}
if (__dmac_channel_transmit_end_detected(arg))
{
__dmac_channel_clear_transmit_end(arg);
OSSemPost(mmc_dma_tx_sem);
}
}
static void jz_mmc_rx_handler(unsigned int arg)
{
if (__dmac_channel_address_error_detected(arg))
{
DEBUG("%s: DMAC address error.", __FUNCTION__);
__dmac_channel_clear_address_error(arg);
}
if (__dmac_channel_transmit_end_detected(arg))
{
__dmac_channel_clear_transmit_end(arg);
OSSemPost(mmc_dma_rx_sem);
}
}
#endif
/* MSC interrupt handler */
void MSC(void)
{
//wakeup_signal(&sd_wakeup);
}
/*******************************************************************************************************************
** Name: void mmc_hardware_init()
** Function: initialize the hardware condiction that access sd card
** Input: NULL
** Output: NULL
********************************************************************************************************************/
static void jz_mmc_hardware_init(void)
{
mmc_init_gpio(); /* init GPIO */
MMC_POWER_ON(); /* turn on power of card */
MMC_RESET(); /* reset mmc/sd controller */
MMC_IRQ_MASK(); /* mask all IRQs */
jz_mmc_stop_clock(); /* stop MMC/SD clock */
#ifdef MMC_DMA_ENABLE
__cpm_start_dmac();
__dmac_enable_module();
// REG_DMAC_DMACR = DMAC_DMACR_DME;
#if MMC_DMA_INTERRUPT
mmc_dma_rx_sem = OSSemCreate(0);
mmc_dma_tx_sem = OSSemCreate(0);
request_irq(IRQ_DMA_0 + RX_DMA_CHANNEL, jz_mmc_rx_handler,
RX_DMA_CHANNEL);
request_irq(IRQ_DMA_0 + TX_DMA_CHANNEL, jz_mmc_tx_handler,
TX_DMA_CHANNEL);
#endif
#endif
}
static void mmc_send_cmd(struct mmc_request *request, int cmd, unsigned int arg,
unsigned short nob, unsigned short block_len,
enum mmc_rsp_t rtype, unsigned char* buffer)
{
request->cmd = cmd;
request->arg = arg;
request->rtype = rtype;
request->nob = nob;
request->block_len = block_len;
request->buffer = buffer;
request->cnt = nob * block_len;
printf("mmc_send_cmd: command = %d",cmd);
jz_mmc_exec_cmd(request);
}
static bool inited = false;
int sd_init(void)
{
if(!inited)
{
jz_mmc_hardware_init();
wakeup_init(&sd_wakeup);
inited = true;
}
struct mmc_request test;
//mmc_send_cmd(&test, MMC_CIM_RESET, 0, 0, 0, RESPONSE_NONE, NULL);
mmc_send_cmd(&test, MMC_GO_IDLE_STATE, 0, 0, 0, RESPONSE_NONE, NULL);
mmc_send_cmd(&test, SD_SEND_OP_COND, MMC_OCR_ARG, 0, 0, RESPONSE_R3, NULL);
return 0;
}
bool card_detect_target(void)
{
return jz_mmc_chkcard() == 1;
}
#ifdef HAVE_HOTSWAP
void card_enable_monitoring_target(bool on)
{
if(on)
{
}
else
{
}
}
#endif
/* TODO */
tCardInfo* card_get_info_target(int card_no)
{
static tCardInfo card;
return &card;
}
/* TODO */
int sd_read_sectors(unsigned long start, int count, void* buf)
{
(void)start;
(void)count;
(void)buf;
return -1;
}
/* TODO */
int sd_write_sectors(unsigned long start, int count, const void* buf)
{
(void)start;
(void)count;
(void)buf;
return -1;
}
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