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sd-as3525v2: Set SD FIFO TX/RX watermarks once in init_controller() and leave them alone after that.

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We only use DMA transfers so we should not need to change/reset the FIFO configuration.

Also add comment showing what we set as the TX/RX watermarks.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25507 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jack Halpin 2010-04-07 05:47:12 +00:00
parent 87eea33def
commit f25f17c5b6
1 changed files with 2 additions and 5 deletions
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7
firmware/target/arm/as3525/sd-as3525v2.c
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@ -655,8 +655,8 @@ static void init_controller(void)
MCI_DEBNCE = 0xfffff; /* default value */ MCI_DEBNCE = 0xfffff; /* default value */
MCI_FIFOTH &= MCI_FIFOTH_MASK; /* Rx watermark = 63(sd reads) Tx watermark = 128 (sd writes) */
MCI_FIFOTH |= 0x503f0080; MCI_FIFOTH = (MCI_FIFOTH & MCI_FIFOTH_MASK) | 0x503f0080;
MCI_MASK = 0xffff & ~(MCI_INT_ACD|MCI_INT_CRDDET|MCI_INT_RXDR|MCI_INT_TXDR); MCI_MASK = 0xffff & ~(MCI_INT_ACD|MCI_INT_CRDDET|MCI_INT_RXDR|MCI_INT_TXDR);
@ -820,9 +820,6 @@ static int sd_transfer_sectors(IF_MD2(int drive,) unsigned long start,
MCI_MASK |= (MCI_DATA_ERROR | MCI_INT_DTO); MCI_MASK |= (MCI_DATA_ERROR | MCI_INT_DTO);
MCI_CTRL |= DMA_ENABLE; MCI_CTRL |= DMA_ENABLE;
MCI_FIFOTH &= MCI_FIFOTH_MASK;
MCI_FIFOTH |= 0x503f0080;
int arg = start; int arg = start;
if(!(card_info[drive].ocr & (1<<30))) /* not SDHC */ if(!(card_info[drive].ocr & (1<<30))) /* not SDHC */
arg *= SD_BLOCK_SIZE; arg *= SD_BLOCK_SIZE;