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ata-sd-pp: reduce size of the buffer used to switch bank, no functional change intended.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25696 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Amaury Pouly 2010-04-22 08:31:02 +00:00
parent 847a0fd56c
commit acd09d3334
1 changed files with 5 additions and 3 deletions
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8
firmware/target/arm/ata-sd-pp.c
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@ -546,11 +546,11 @@ static inline void copy_write_sectors(const unsigned char** buf)
static int sd_select_bank(unsigned char bank) static int sd_select_bank(unsigned char bank)
{ {
unsigned char card_data[512]; unsigned char card_data[FIFO_LEN*2];// FIFO_LEN words=FIFO_LEN*2 bytes
const unsigned char* write_buf; const unsigned char* write_buf;
int i, ret; int i, ret;
memset(card_data, 0, 512); memset(card_data, 0, sizeof card_data);
ret = sd_wait_for_state(SD_TRAN, EC_TRAN_SEL_BANK); ret = sd_wait_for_state(SD_TRAN, EC_TRAN_SEL_BANK);
if (ret < 0) if (ret < 0)
@ -569,13 +569,15 @@ static int sd_select_bank(unsigned char bank)
card_data[0] = bank; card_data[0] = bank;
/* Write the card data */ /* Write the card data */
write_buf = card_data;
for (i = 0; i < SD_BLOCK_SIZE/2; i += FIFO_LEN) for (i = 0; i < SD_BLOCK_SIZE/2; i += FIFO_LEN)
{ {
write_buf = card_data;
/* Wait for the FIFO to empty */ /* Wait for the FIFO to empty */
if (sd_poll_status(STAT_XMIT_FIFO_EMPTY, 10000)) if (sd_poll_status(STAT_XMIT_FIFO_EMPTY, 10000))
{ {
copy_write_sectors(&write_buf); /* Copy one chunk of 16 words */ copy_write_sectors(&write_buf); /* Copy one chunk of 16 words */
/* clear buffer: only the first chunk contains interesting data (bank), the remaining is zero filling */
memset(card_data, 0, sizeof card_data);
continue; continue;
} }