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MMC: Remove the MMC bounce buffer

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Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Andy Fleming <afleming@freescale.com>
Cc: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Marek Vasut 2012-08-26 15:19:09 +00:00 • committed by Andy Fleming
parent 6dc71c8d2a
commit 49a627f8a1
1 changed files with 0 additions and 92 deletions
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92
drivers/mmc/mmc.c
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@ -47,93 +47,6 @@ int __board_mmc_getcd(struct mmc *mmc) {
int board_mmc_getcd(struct mmc *mmc)__attribute__((weak,
alias("__board_mmc_getcd")));
#ifdef CONFIG_MMC_BOUNCE_BUFFER
static int mmc_bounce_need_bounce(struct mmc_data *orig)
{
ulong addr, len;
if (orig->flags & MMC_DATA_READ)
addr = (ulong)orig->dest;
else
addr = (ulong)orig->src;
if (addr % ARCH_DMA_MINALIGN) {
debug("MMC: Unaligned data destination address %08lx!\n", addr);
return 1;
}
len = (ulong)(orig->blocksize * orig->blocks);
if (len % ARCH_DMA_MINALIGN) {
debug("MMC: Unaligned data destination length %08lx!\n", len);
return 1;
}
return 0;
}
static int mmc_bounce_buffer_start(struct mmc_data *backup,
struct mmc_data *orig)
{
ulong origlen, len;
void *buffer;
if (!orig)
return 0;
if (!mmc_bounce_need_bounce(orig))
return 0;
memcpy(backup, orig, sizeof(struct mmc_data));
origlen = orig->blocksize * orig->blocks;
len = roundup(origlen, ARCH_DMA_MINALIGN);
buffer = memalign(ARCH_DMA_MINALIGN, len);
if (!buffer) {
puts("MMC: Error allocating MMC bounce buffer!\n");
return 1;
}
if (orig->flags & MMC_DATA_READ) {
orig->dest = buffer;
} else {
memcpy(buffer, orig->src, origlen);
orig->src = buffer;
}
return 0;
}
static void mmc_bounce_buffer_stop(struct mmc_data *backup,
struct mmc_data *orig)
{
ulong len;
if (!orig)
return;
if (!mmc_bounce_need_bounce(backup))
return;
if (backup->flags & MMC_DATA_READ) {
len = backup->blocksize * backup->blocks;
memcpy(backup->dest, orig->dest, len);
free(orig->dest);
orig->dest = backup->dest;
} else {
free((void *)orig->src);
orig->src = backup->src;
}
return;
}
#else
static inline int mmc_bounce_buffer_start(struct mmc_data *backup,
struct mmc_data *orig) { return 0; }
static inline void mmc_bounce_buffer_stop(struct mmc_data *backup,
struct mmc_data *orig) { }
#endif
int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
struct mmc_data backup;
@ -141,10 +54,6 @@ int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
memset(&backup, 0, sizeof(backup));
ret = mmc_bounce_buffer_start(&backup, data);
if (ret)
return ret;
#ifdef CONFIG_MMC_TRACE
int i;
u8 *ptr;
@ -196,7 +105,6 @@ int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
#else
ret = mmc->send_cmd(mmc, cmd, data);
#endif
mmc_bounce_buffer_stop(&backup, data);
return ret;
}