[U-Boot] [PATCH v2] mvebu_mmc: Driver addition

[Pantelis Antoniou]

Hi Mario,

On Aug 25, 2014, at 3:12 PM, Mario Schuknecht <mario.schuknecht at dresearch-fe.de> wrote:

> In function mvebu_mmc_write notice command timeout. It is possible that a
> command is done, but a timeout occurred.
> 
> Enable timeout in set bus function.
> 
> Set window registers. Without that I could not use the driver on a Kirkwood
> 88F6282 SoC.
> 
> Set high capacity and 52MHz driver feature.
> 
> Signed-off-by: Mario Schuknecht <mario.schuknecht at dresearch-fe.de>
> ---
> 
> Changes in v2:
> - Correct indentation
> - Remove unneeded parentheses
> - Use correct coding style for multi-line statements
> 
> drivers/mmc/mvebu_mmc.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 61 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/mvebu_mmc.c b/drivers/mmc/mvebu_mmc.c
> index 9759198..d34e743 100644
> --- a/drivers/mmc/mvebu_mmc.c
> +++ b/drivers/mmc/mvebu_mmc.c
> @@ -17,8 +17,12 @@
> #include <asm/arch/kirkwood.h>
> #include <mvebu_mmc.h>
> 
> +DECLARE_GLOBAL_DATA_PTR;
> +
> #define DRIVER_NAME "MVEBU_MMC"
> 
> +#define MVEBU_TARGET_DRAM 0
> +
> static void mvebu_mmc_write(u32 offs, u32 val)
> {
> 	writel(val, CONFIG_SYS_MMC_BASE + (offs));
> @@ -164,6 +168,9 @@ static int mvebu_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
> 			return TIMEOUT;
> 		}
> 	}
> +	if (mvebu_mmc_read(SDIO_ERR_INTR_STATUS) &
> +		(SDIO_ERR_CMD_TIMEOUT | SDIO_ERR_DATA_TIMEOUT))
> +		return TIMEOUT;
> 
> 	/* Handling response */
> 	if (cmd->resp_type & MMC_RSP_136) {
> @@ -271,6 +278,7 @@ static void mvebu_mmc_set_bus(unsigned int bus)
> 
> 	/* default to maximum timeout */
> 	ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX);
> +	ctrl_reg |= SDIO_HOST_CTRL_TMOUT_EN;
> 
> 	ctrl_reg |= SDIO_HOST_CTRL_PUSH_PULL_EN;
> 
> @@ -296,6 +304,55 @@ static void mvebu_mmc_set_ios(struct mmc *mmc)
> 	mvebu_mmc_set_clk(mmc->clock);
> }
> 
> +/*
> + * Set window register.
> + */
> +static void mvebu_window_setup(void)
> +{
> +	int i;
> +
> +	for (i = 0; i < 4; i++) {
> +		mvebu_mmc_write(WINDOW_CTRL(i), 0);
> +		mvebu_mmc_write(WINDOW_BASE(i), 0);
> +	}
> +	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
> +		u32 size, base, attrib;
> +
> +		/* Enable DRAM bank */
> +		switch (i) {
> +		case 0:
> +			attrib = KWCPU_ATTR_DRAM_CS0;
> +			break;
> +		case 1:
> +			attrib = KWCPU_ATTR_DRAM_CS1;
> +			break;
> +		case 2:
> +			attrib = KWCPU_ATTR_DRAM_CS2;
> +			break;
> +		case 3:
> +			attrib = KWCPU_ATTR_DRAM_CS3;
> +			break;
> +		default:
> +			/* invalide bank, disable access */
> +			attrib = 0;
> +			break;
> +		}
> +
> +		size = gd->bd->bi_dram[i].size;
> +		base = gd->bd->bi_dram[i].start;
> +		if (size && attrib) {
> +			mvebu_mmc_write(WINDOW_CTRL(i),
> +					MVCPU_WIN_CTRL_DATA(size,
> +							    MVEBU_TARGET_DRAM,
> +							    attrib,
> +							    MVCPU_WIN_ENABLE));
> +		} else {
> +			mvebu_mmc_write(WINDOW_CTRL(i), MVCPU_WIN_DISABLE);
> +		}
> +		mvebu_mmc_write(WINDOW_BASE(i), base);
> +	}
> +}
> +
> static int mvebu_mmc_initialize(struct mmc *mmc)
> {
> 	debug("%s: mvebu_mmc_initialize", DRIVER_NAME);
> @@ -322,6 +379,8 @@ static int mvebu_mmc_initialize(struct mmc *mmc)
> 	mvebu_mmc_write(SDIO_NOR_INTR_EN, 0);
> 	mvebu_mmc_write(SDIO_ERR_INTR_EN, 0);
> 
> +	mvebu_window_setup();
> +
> 	/* SW reset */
> 	mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW);
> 
> @@ -342,7 +401,8 @@ static struct mmc_config mvebu_mmc_cfg = {
> 	.f_min		= MVEBU_MMC_BASE_FAST_CLOCK / MVEBU_MMC_BASE_DIV_MAX,
> 	.f_max		= MVEBU_MMC_CLOCKRATE_MAX,
> 	.voltages	= MMC_VDD_32_33 | MMC_VDD_33_34,
> -	.host_caps	= MMC_MODE_4BIT | MMC_MODE_HS,
> +	.host_caps	= MMC_MODE_4BIT | MMC_MODE_HS | MMC_MODE_HC |
> +			  MMC_MODE_HS_52MHz,
> 	.part_type	= PART_TYPE_DOS,
> 	.b_max		= CONFIG_SYS_MMC_MAX_BLK_COUNT,
> };
> -- 
> 1.8.4.5
> 

Applied, thanks

Acked-by: Pantelis Antoniou <panto at antoniou-consulting.com>