Am 11/10/2012 05:58, schrieb Fabio Estevam:
> From: Fabio Estevam <fabio.este...@freescale.com>
>
> mx25pdk has a SD/MMC slot connected to esdhc1.
>
> Add support for it and allow the environment variables to be saved into
> SD/MMC.
>
> Signed-off-by: Fabio Estevam <fabio.este...@freescale.com>
> ---
Hi Fabio,
> board/freescale/mx25pdk/mx25pdk.c | 51
> +++++++++++++++++++++++++++++++++++++
> include/configs/mx25pdk.h | 16 +++++++++++-
> 2 files changed, 66 insertions(+), 1 deletion(-)
>
> diff --git a/board/freescale/mx25pdk/mx25pdk.c
> b/board/freescale/mx25pdk/mx25pdk.c
> index 4a8352f..e850b3e 100644
> --- a/board/freescale/mx25pdk/mx25pdk.c
> +++ b/board/freescale/mx25pdk/mx25pdk.c
> @@ -19,12 +19,23 @@
>
> #include <common.h>
> #include <asm/io.h>
> +#include <asm/gpio.h>
> #include <asm/arch/imx-regs.h>
> #include <asm/arch/imx25-pinmux.h>
> #include <asm/arch/sys_proto.h>
> +#include <mmc.h>
> +#include <fsl_esdhc.h>
> +
> +#define CARD_DETECT IMX_GPIO_NR(2, 1)
>
> DECLARE_GLOBAL_DATA_PTR;
>
> +#ifdef CONFIG_FSL_ESDHC
> +struct fsl_esdhc_cfg esdhc_cfg[1] = {
> + {IMX_MMC_SDHC1_BASE},
> +};
> +#endif
> +
> int dram_init(void)
> {
> /* dram_init must store complete ramsize in gd->ram_size */
> @@ -48,6 +59,46 @@ int board_init(void)
> return 0;
> }
>
> +#ifdef CONFIG_FSL_ESDHC
> +int board_mmc_getcd(struct mmc *mmc)
> +{
> + struct iomuxc_mux_ctl *muxctl;
> + struct iomuxc_pad_ctl *padctl;
> + u32 gpio_mux_mode = MX25_PIN_MUX_MODE(5);
> +
> + /*
> + * Set up the Card Detect pin.
> + *
> + * SD1_GPIO_CD: gpio2_1 is ALT 5 mode of pin A15
> + *
> + */
> + muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
> + padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE;
> +
> + writel(gpio_mux_mode, &muxctl->pad_a15);
> + writel(0x0, &padctl->pad_a15);
> +
> + gpio_direction_input(CARD_DETECT);
> + return !gpio_get_value(CARD_DETECT);
> +}
> +
> +int board_mmc_init(bd_t *bis)
> +{
> + struct iomuxc_mux_ctl *muxctl;
> + u32 sdhc1_mux_mode = MX25_PIN_MUX_MODE(0) | MX25_PIN_MUX_SION;
> +
> + muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
> + writel(sdhc1_mux_mode, &muxctl->pad_sd1_cmd);
> + writel(sdhc1_mux_mode, &muxctl->pad_sd1_clk);
> + writel(sdhc1_mux_mode, &muxctl->pad_sd1_data0);
> + writel(sdhc1_mux_mode, &muxctl->pad_sd1_data1);
> + writel(sdhc1_mux_mode, &muxctl->pad_sd1_data2);
> + writel(sdhc1_mux_mode, &muxctl->pad_sd1_data3);
> +
You need also to set up the SDHC clock. This comes after merging:
http://patchwork.ozlabs.org/patch/188329/
Adding
esdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
before calling fsl_esdhc_initialize() should be enough.
Best regards,
Stefano
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