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Sansa AMS: Implement 4 bit widebus mode for SD cards.

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Both the internal and uSD cards are now put into 4 bit widebus mode during initialization except for bootloader.
Add MCI_START_BIT_ERR to MCI_ERROR list and change name to MCI_DATA_ERROR for clarity.
Make appropriate changes to SD error codes.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23977 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2009-12-13 20:37:55 +00:00
parent cfe82de670
commit 87770d2439
1 changed files with 38 additions and 9 deletions
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47
firmware/target/arm/as3525/ata_sd_as3525.c
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@ -79,8 +79,12 @@
#define MCI_SELECT(i) (*(volatile unsigned long *) (pl180_base[i]+0x44))
#define MCI_FIFO_CNT(i) (*(volatile unsigned long *) (pl180_base[i]+0x48))
#define MCI_ERROR \
(MCI_DATA_CRC_FAIL | MCI_DATA_TIMEOUT | MCI_RX_OVERRUN | MCI_TX_UNDERRUN)
#define MCI_DATA_ERROR \
( MCI_DATA_CRC_FAIL \
| MCI_DATA_TIMEOUT \
| MCI_TX_UNDERRUN \
| MCI_RX_OVERRUN \
| MCI_START_BIT_ERR)
#define MCI_FIFO(i) ((unsigned long *) (pl180_base[i]+0x80))
/* volumes */
@ -181,7 +185,7 @@ void INT_NAND(void)
{
const int status = MCI_STATUS(INTERNAL_AS3525);
transfer_error[INTERNAL_AS3525] = status & MCI_ERROR;
transfer_error[INTERNAL_AS3525] = status & MCI_DATA_ERROR;
wakeup_signal(&transfer_completion_signal);
MCI_CLEAR(INTERNAL_AS3525) = status;
@ -192,7 +196,7 @@ void INT_MCI0(void)
{
const int status = MCI_STATUS(SD_SLOT_AS3525);
transfer_error[SD_SLOT_AS3525] = status & MCI_ERROR;
transfer_error[SD_SLOT_AS3525] = status & MCI_DATA_ERROR;
wakeup_signal(&transfer_completion_signal);
MCI_CLEAR(SD_SLOT_AS3525) = status;
@ -275,7 +279,6 @@ static int sd_init_card(const int drive)
/* CMD0 Go Idle */
if(!send_cmd(drive, SD_GO_IDLE_STATE, 0, MCI_NO_FLAGS, NULL))
return -1;
mci_delay();
/* CMD8 Check for v2 sd card. Must be sent before using ACMD41
@ -367,6 +370,32 @@ static int sd_init_card(const int drive)
/* CMD7 w/rca: Select card to put it in TRAN state */
if(!send_cmd(drive, SD_SELECT_CARD, card_info[drive].rca, MCI_ARG, NULL))
return -10;
mci_delay();
#ifndef BOOTLOADER
/* Switch to to 4 bit widebus mode */
if(sd_wait_for_state(drive, SD_TRAN) < 0)
return -11;
mci_delay();
/* CMD55 */
if(!send_cmd(drive, SD_APP_CMD, card_info[drive].rca, MCI_ARG, NULL))
return -12;
mci_delay();
/* ACMD6 */
if(!send_cmd(drive, SD_SET_BUS_WIDTH, 2, MCI_ARG, NULL))
return -13;
mci_delay();
/* CMD55 */
if(!send_cmd(drive, SD_APP_CMD, card_info[drive].rca, MCI_ARG, NULL))
return -14;
mci_delay();
/* ACMD42 */
if(!send_cmd(drive, SD_SET_CLR_CARD_DETECT, 0, MCI_ARG, NULL))
return -15;
mci_delay();
/* Now that card is widebus make controller widebus also */
MCI_CLOCK(drive) |= MCI_CLOCK_WIDEBUS;
#endif
/*
* enable bank switching
@ -378,7 +407,7 @@ static int sd_init_card(const int drive)
{
const int ret = sd_select_bank(-1);
if(ret < 0)
return ret - 11;
return ret -16;
}
card_info[drive].initialized = 1;
@ -481,7 +510,7 @@ static void init_pl180_controller(const int drive)
MCI_COMMAND(drive) = MCI_DATA_CTRL(drive) = 0;
MCI_CLEAR(drive) = 0x7ff;
MCI_MASK0(drive) = MCI_ERROR | MCI_DATA_END;
MCI_MASK0(drive) = MCI_DATA_ERROR | MCI_DATA_END;
MCI_MASK1(drive) = 0;
#ifdef HAVE_MULTIDRIVE
VIC_INT_ENABLE =
@ -634,7 +663,7 @@ static int sd_select_bank(signed char bank)
(1<<3) /* DMA */ |
(9<<4) /* 2^9 = 512 */ ;
/* Wakeup signal comes from NAND/MCIO isr on MCI_ERROR | MCI_DATA_END */
/* Wakeup signal from NAND/MCIO isr on MCI_DATA_ERROR | MCI_DATA_END */
wakeup_wait(&transfer_completion_signal, TIMEOUT_BLOCK);
/* Wait for FIFO to empty, card may still be in PRG state */
@ -764,7 +793,7 @@ static int sd_transfer_sectors(IF_MD2(int drive,) unsigned long start,
(1<<3) /* DMA */ |
(9<<4) /* 2^9 = 512 */ ;
/* Wakeup signal comes from NAND/MCIO isr on MCI_ERROR | MCI_DATA_END */
/* Wakeup signal from NAND/MCIO isr on MCI_DATA_ERROR | MCI_DATA_END */
wakeup_wait(&transfer_completion_signal, TIMEOUT_BLOCK);
/* Wait for FIFO to empty, card may still be in PRG state for writes */