[U-Boot] [PATCH] Add support for initializing MMC

[Chee, Tien Fong]

On Thu, 2018-12-13 at 23:32 +0800, tien.fong.chee at intel.com wrote:
> From: Tien Fong Chee <tien.fong.chee at intel.com>
> 
> Firmware loader would encounter problem if the MMC is accessed before
> initializing it. This patch would adding the support of initializing
> MMC before the MMC is accessed by firmware loader.
> 
> Signed-off-by: Tien Fong Chee <tien.fong.chee at intel.com>
> ---
>  drivers/misc/fs_loader.c |   33 ++++++++++++++++++++++++++++++++-
>  1 files changed, 32 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/misc/fs_loader.c b/drivers/misc/fs_loader.c
> index 57a14a3..675f625 100644
> --- a/drivers/misc/fs_loader.c
> +++ b/drivers/misc/fs_loader.c
> @@ -12,6 +12,7 @@
>  #include <linux/string.h>
>  #include <mapmem.h>
>  #include <malloc.h>
> +#include <mmc.h>
>  #include <spl.h>
>  
>  DECLARE_GLOBAL_DATA_PTR;
> @@ -221,6 +222,7 @@ static int fs_loader_ofdata_to_platdata(struct
> udevice *dev)
>  {
>  	const char *fs_loader_path;
>  	u32 phandlepart[2];
> +	struct device_platdata *plat = NULL;
>  
>  	fs_loader_path = ofnode_get_chosen_prop("firmware-loader");
>  
> @@ -229,7 +231,6 @@ static int fs_loader_ofdata_to_platdata(struct
> udevice *dev)
>  
>  		fs_loader_node = ofnode_path(fs_loader_path);
>  		if (ofnode_valid(fs_loader_node)) {
> -			struct device_platdata *plat;
>  			plat = dev->platdata;
>  
>  			if (!ofnode_read_u32_array(fs_loader_node,
> @@ -247,6 +248,36 @@ static int fs_loader_ofdata_to_platdata(struct
> udevice *dev)
>  		}
>  	}
>  
I just realized this portion of codes should be moved to polling
function. I will send out another patch tomorrow.
> +#ifdef CONFIG_MMC
> +	int ret;
> +
> +	ret = mmc_initialize(NULL);
> +	if (ret) {
> +		debug("MMC: could not initialize mmc. error: %d\n",
> ret);
> +
> +		return ret;
> +	}
> +
> +	if (plat->phandlepart.phandle) {
> +		ofnode node = ofnode_get_by_phandle(plat-
> >phandlepart.phandle);
> +
> +		struct udevice *mmc_dev = NULL;
> +
> +		ret = device_get_global_by_ofnode(node, &mmc_dev);
> +		if (!ret) {
> +			struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
> +
> +			ret = mmc_init(mmc);
> +			if (ret) {
> +				debug("MMC: mmc init failed with
> error: %d\n",
> +					ret);
> +
> +				return ret;
> +			}
> +		}
> +	}
> +#endif
> +
>  	return 0;
>  }
>