@ -43,13 +43,6 @@
# include <asm/arch/sys_proto.h>
# include <asm/arch/dma.h>
/*
* CONFIG_MXS_MMC_DMA : This feature is highly experimental and has no
* performance benefit unless you operate the platform with
* data cache enabled . This is disabled by default , enable
* only if you know what you ' re doing .
*/
struct mxsmmc_priv {
int id ;
struct mxs_ssp_regs * regs ;
@ -61,8 +54,8 @@ struct mxsmmc_priv {
} ;
# define MXSMMC_MAX_TIMEOUT 10000
# define MXSMMC_SMALL_TRANSFER 512
# ifndef CONFIG_MXS_MMC_DMA
static int mxsmmc_send_cmd_pio ( struct mxsmmc_priv * priv , struct mmc_data * data )
{
struct mxs_ssp_regs * ssp_regs = priv - > regs ;
@ -98,7 +91,7 @@ static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data)
return timeout ? 0 : COMM_ERR ;
}
# else
static int mxsmmc_send_cmd_dma ( struct mxsmmc_priv * priv , struct mmc_data * data )
{
uint32_t data_count = data - > blocksize * data - > blocks ;
@ -139,7 +132,6 @@ static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
return 0 ;
}
# endif
/*
* Sends a command out on the bus . Takes the mmc pointer ,
@ -271,24 +263,26 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
if ( ! data )
return 0 ;
# ifdef CONFIG_MXS_MMC_DMA
writel ( SSP_CTRL1_DMA_ENABLE , & ssp_regs - > hw_ssp_ctrl1_set ) ;
ret = mxsmmc_send_cmd_dma ( priv , data ) ;
if ( ret ) {
printf ( " MMC%d: DMA transfer failed \n " , mmc - > block_dev . dev ) ;
return ret ;
}
# else
writel ( SSP_CTRL1_DMA_ENABLE , & ssp_regs - > hw_ssp_ctrl1_clr ) ;
if ( data - > blocksize * data - > blocks < MXSMMC_SMALL_TRANSFER ) {
writel ( SSP_CTRL1_DMA_ENABLE , & ssp_regs - > hw_ssp_ctrl1_set ) ;
ret = mxsmmc_send_cmd_pio ( priv , data ) ;
if ( ret ) {
printf ( " MMC%d: Data timeout with command %d (status 0x%08x)! \n " ,
mmc - > block_dev . dev , cmd - > cmdidx , reg ) ;
return ret ;
ret = mxsmmc_send_cmd_dma ( priv , data ) ;
if ( ret ) {
printf ( " MMC%d: DMA transfer failed \n " ,
mmc - > block_dev . dev ) ;
return ret ;
}
} else {
writel ( SSP_CTRL1_DMA_ENABLE , & ssp_regs - > hw_ssp_ctrl1_clr ) ;
ret = mxsmmc_send_cmd_pio ( priv , data ) ;
if ( ret ) {
printf ( " MMC%d: Data timeout with command %d "
" (status 0x%08x)! \n " ,
mmc - > block_dev . dev , cmd - > cmdidx , reg ) ;
return ret ;
}
}
# endif
/* Check data errors */
reg = readl ( & ssp_regs - > hw_ssp_status ) ;