static int tegra_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
void *buf;
unsigned int bbflags;
size_t len;
struct bounce_buffer bbstate;
int ret;
if (data) {
if (data->flags & MMC_DATA_READ) {
buf = data->dest;
bbflags = GEN_BB_WRITE;
} else {
buf = (void *)data->src;
bbflags = GEN_BB_READ;
}
len = data->blocks * data->blocksize;
bounce_buffer_start(&bbstate, buf, len, bbflags);
}
ret = mmc_send_cmd_bounced(mmc, cmd, data, &bbstate);
if (data)
bounce_buffer_stop(&bbstate);
return ret;
}
static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
{
uint32_t data_count = data->blocksize * data->blocks;
int dmach;
struct mxs_dma_desc *desc = priv->desc;
void *addr;
unsigned int flags;
struct bounce_buffer bbstate;
memset(desc, 0, sizeof(struct mxs_dma_desc));
desc->address = (dma_addr_t)desc;
if (data->flags & MMC_DATA_READ) {
priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_WRITE;
addr = data->dest;
flags = GEN_BB_WRITE;
} else {
priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_READ;
addr = (void *)data->src;
flags = GEN_BB_READ;
}
bounce_buffer_start(&bbstate, addr, data_count, flags);
priv->desc->cmd.address = (dma_addr_t)bbstate.bounce_buffer;
priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM |
(data_count << MXS_DMA_DESC_BYTES_OFFSET);
dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id + mxsmmc_id_offset;
mxs_dma_desc_append(dmach, priv->desc);
if (mxs_dma_go(dmach)) {
bounce_buffer_stop(&bbstate);
return COMM_ERR;
}
bounce_buffer_stop(&bbstate);
return 0;
}