[U-Boot] [PATCH v2 4/6] mmc: hi6220_dw_mmc: Add hi6220 glue code for dw_mmc controller.

[Jaehoon Chung <jh80.chung@samsung.com>]

On 07/09/2015 12:57 AM, Peter Griffin wrote:
> This patch adds the glue code for hi6220 SoC which has 2x synopsis
> dw_mmc controllers. This will be used by the hikey board support
> in subsequent patches.
> 
> Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
> ---
>  arch/arm/include/asm/arch-hi6220/dwmmc.h |  8 +++++
>  drivers/mmc/Makefile                     |  1 +
>  drivers/mmc/hi6220_dw_mmc.c              | 56 ++++++++++++++++++++++++++++++++
>  3 files changed, 65 insertions(+)
>  create mode 100644 arch/arm/include/asm/arch-hi6220/dwmmc.h
>  create mode 100644 drivers/mmc/hi6220_dw_mmc.c
> 
> diff --git a/arch/arm/include/asm/arch-hi6220/dwmmc.h b/arch/arm/include/asm/arch-hi6220/dwmmc.h
> new file mode 100644
> index 0000000..c747383
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-hi6220/dwmmc.h
> @@ -0,0 +1,8 @@
> +/*
> + * (C) Copyright 2015 Linaro
> + * Peter Griffin <peter.griffin@linaro.org>
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + */
> +
> +int hi6220_dwmci_add_port(int index, u32 regbase, int bus_width);
> diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
> index ed73687..81a1a8f 100644
> --- a/drivers/mmc/Makefile
> +++ b/drivers/mmc/Makefile
> @@ -11,6 +11,7 @@ obj-$(CONFIG_BFIN_SDH) += bfin_sdh.o
>  obj-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
>  obj-$(CONFIG_DWMMC) += dw_mmc.o
>  obj-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
> +obj-$(CONFIG_HIKEY_DWMMC) += hi6220_dw_mmc.o
>  obj-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
>  obj-$(CONFIG_FTSDC010) += ftsdc010_mci.o
>  obj-$(CONFIG_FTSDC021) += ftsdc021_sdhci.o
> diff --git a/drivers/mmc/hi6220_dw_mmc.c b/drivers/mmc/hi6220_dw_mmc.c
> new file mode 100644
> index 0000000..106f673
> --- /dev/null
> +++ b/drivers/mmc/hi6220_dw_mmc.c
> @@ -0,0 +1,56 @@
> +/*
> + * (C) Copyright 2015 Linaro
> + * peter.griffin <peter.griffin@linaro.org>
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <dwmmc.h>
> +#include <malloc.h>
> +#include <asm-generic/errno.h>
> +
> +#define	DWMMC_MAX_CH_NUM		4
> +
> +#define	DWMMC_MAX_FREQ			50000000
> +#define	DWMMC_MIN_FREQ			378000

Is there any reason for using 378000 instead of 400K?

> +
> +/* Source clock is configured to 100Mhz by ATF bl1*/
> +#define MMC0_DEFAULT_FREQ		100000000

Always configured to 100Mhz? Is there no method to get clock value?

> +
> +static int hi6220_dwmci_core_init(struct dwmci_host *host, int index)
> +{
> +	host->name = "HiKey DWMMC";
> +
> +	host->dev_index = index;
> +
> +	/* Add the mmc channel to be registered with mmc core */
> +	if (add_dwmci(host, DWMMC_MAX_FREQ, DWMMC_MIN_FREQ)) {
> +		printf("DWMMC%d registration failed\n", index);
> +		return -1;
> +	}
> +	return 0;
> +}
> +
> +/*
> + * This function adds the mmc channel to be registered with mmc core.
> + * index -	mmc channel number.
> + * regbase -	register base address of mmc channel specified in 'index'.
> + * bus_width -	operating bus width of mmc channel specified in 'index'.
> + */
> +int hi6220_dwmci_add_port(int index, u32 regbase, int bus_width)
> +{
> +	struct dwmci_host *host = NULL;
> +
> +	host = calloc(1, sizeof(struct dwmci_host));
> +	if (!host) {
> +		error("dwmci_host malloc fail!\n");

malloc -> calloc?

Best Regards,
Jaehoon Chung

> +		return -ENOMEM;
> +	}
> +
> +	host->ioaddr = (void *)regbase;
> +	host->buswidth = bus_width;
> +	host->bus_hz = MMC0_DEFAULT_FREQ;
> +
> +	return hi6220_dwmci_core_init(host, index);
> +}
>