[U-Boot] [U-Boot, v2, 2/3] mmc: Convert HI6220 MMC driver to driver model

[Tom Rini <trini@konsulko.com>]

On Thu, Dec 27, 2018 at 07:04:04PM +0530, Manivannan Sadhasivam wrote:

> From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> 
> Convert HiSilicon HI6220 MMC driver based on DWMMC IP to driver
> model.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> Reviewed-by: Simon Glass <sjg@chromium.org>
> ---
> 
> Changes in v2: Added Simon's Reviewed-by tag.
> 
>  configs/hikey_defconfig     |   1 +
>  drivers/mmc/hi6220_dw_mmc.c | 100 +++++++++++++++++++++++++-----------
>  2 files changed, 70 insertions(+), 31 deletions(-)
> 
> diff --git a/configs/hikey_defconfig b/configs/hikey_defconfig
> index 8dc5a2823eb..cced2b4802e 100644
> --- a/configs/hikey_defconfig
> +++ b/configs/hikey_defconfig
> @@ -18,6 +18,7 @@ CONFIG_DEFAULT_DEVICE_TREE="hi6220-hikey"
>  CONFIG_ENV_IS_IN_FAT=y
>  CONFIG_ENV_FAT_INTERFACE="mmc"
>  CONFIG_ENV_FAT_DEVICE_AND_PART="1:1"
> +CONFIG_DM_MMC=y
>  CONFIG_MMC_DW=y
>  CONFIG_MMC_DW_K3=y
>  CONFIG_CONS_INDEX=4
> diff --git a/drivers/mmc/hi6220_dw_mmc.c b/drivers/mmc/hi6220_dw_mmc.c
> index ce395d53c94..cc58aff38cc 100644
> --- a/drivers/mmc/hi6220_dw_mmc.c
> +++ b/drivers/mmc/hi6220_dw_mmc.c
> @@ -5,51 +5,89 @@
>   */
>  
>  #include <common.h>
> +#include <dm.h>
>  #include <dwmmc.h>
> +#include <errno.h>
> +#include <fdtdec.h>
>  #include <malloc.h>
> -#include <linux/errno.h>
>  
> -#define	DWMMC_MAX_CH_NUM		4
> +DECLARE_GLOBAL_DATA_PTR;
>  
> -#define	DWMMC_MAX_FREQ			50000000
> -#define	DWMMC_MIN_FREQ			400000
> +struct hi6220_dwmmc_plat {
> +	struct mmc_config cfg;
> +	struct mmc mmc;
> +};
>  
> -/* Source clock is configured to 100MHz by ATF bl1*/
> -#define MMC0_DEFAULT_FREQ		100000000
> +struct hi6220_dwmmc_priv_data {
> +	struct dwmci_host host;
> +};
>  
> -static int hi6220_dwmci_core_init(struct dwmci_host *host, int index)
> +static int hi6220_dwmmc_ofdata_to_platdata(struct udevice *dev)
>  {
> -	host->name = "Hisilicon DWMMC";
> +	struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
> +	struct dwmci_host *host = &priv->host;
>  
> -	host->dev_index = index;
> +	host->name = dev->name;
> +	host->ioaddr = (void *)devfdt_get_addr(dev);
> +	host->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
> +					"bus-width", 4);
> +
> +	/* use non-removable property for differentiating SD card and eMMC */
> +	if (dev_read_bool(dev, "non-removable"))
> +		host->dev_index = 0;
> +	else
> +		host->dev_index = 1;
> +
> +	host->priv = priv;
>  
> -	/* 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)
> +static int hi6220_dwmmc_probe(struct udevice *dev)
>  {
> -	struct dwmci_host *host = NULL;
> +	struct hi6220_dwmmc_plat *plat = dev_get_platdata(dev);
> +	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
> +	struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
> +	struct dwmci_host *host = &priv->host;
>  
> -	host = calloc(1, sizeof(struct dwmci_host));
> -	if (!host) {
> -		pr_err("dwmci_host calloc failed!\n");
> -		return -ENOMEM;
> -	}
> +	/* Use default bus speed due to absence of clk driver */
> +	host->bus_hz = 50000000;
>  
> -	host->ioaddr = (void *)(ulong)regbase;
> -	host->buswidth = bus_width;
> -	host->bus_hz = MMC0_DEFAULT_FREQ;
> +	dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, 400000);
> +	host->mmc = &plat->mmc;
>  
> -	return hi6220_dwmci_core_init(host, index);
> +	host->mmc->priv = &priv->host;
> +	upriv->mmc = host->mmc;
> +	host->mmc->dev = dev;
> +
> +	return dwmci_probe(dev);
>  }
> +
> +static int hi6220_dwmmc_bind(struct udevice *dev)
> +{
> +	struct hi6220_dwmmc_plat *plat = dev_get_platdata(dev);
> +	int ret;
> +
> +	ret = dwmci_bind(dev, &plat->mmc, &plat->cfg);
> +	if (ret)
> +		return ret;
> +
> +	return 0;
> +}
> +
> +static const struct udevice_id hi6220_dwmmc_ids[] = {
> +	{ .compatible = "hisilicon,hi6220-dw-mshc" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(hi6220_dwmmc_drv) = {
> +	.name = "hi6220_dwmmc",
> +	.id = UCLASS_MMC,
> +	.of_match = hi6220_dwmmc_ids,
> +	.ofdata_to_platdata = hi6220_dwmmc_ofdata_to_platdata,
> +	.ops = &dm_dwmci_ops,
> +	.bind = hi6220_dwmmc_bind,
> +	.probe = hi6220_dwmmc_probe,
> +	.priv_auto_alloc_size = sizeof(struct hi6220_dwmmc_priv_data),
> +	.platdata_auto_alloc_size = sizeof(struct hi6220_dwmmc_plat),
> +};

-- 
Tom
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