linux-kernel - Re: [PATCH 1/3] mmc: Support FFU for eMMC v5.0

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Date:	Tue, 11 Nov 2014 12:07:59 +0900
From:	Jaehoon Chung <jh80.chung@...sung.com>
To:	Avi Shchislowski <avi.shchislowski@...disk.com>,
	ulf.hansson@...aro.org
Cc:	'Chris Ball' <chris@...ntf.net>, linux-mmc@...r.kernel.org,
	Alex.Lemberg@...disk.com, gwendal@...gle.com,
	open list <linux-kernel@...r.kernel.org>,
	CPGS <cpgs@...sung.com>
Subject: Re: [PATCH 1/3] mmc: Support FFU for eMMC v5.0

Hi,

how did you make the patch?
This patch didn't apply at Ulf's repository.


On 11/11/2014 02:13 AM, Avi Shchislowski wrote:
> 
> Add eMMC5.0 ffu ext_csd fields
> 
> Signed-off-by: Avi Shchislowski <avi.shchislowski@...disk.com>
> Signed-off-by: Alex Lemberg <alex.lemberg@...disk.com>
> 
> 
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index 1eda8dd..3b86ed3 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -603,6 +603,15 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
>  		card->ext_csd.data_sector_size = 512;
>  	}
>  
> +	/* eMMC v5 or later */
> +	if (card->ext_csd.rev >= 7) {
> +		card->ext_csd.ffu_capable =
> +			((ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) == 0x1) &&
> +			((ext_csd[EXT_CSD_FW_CONFIG] & 0x1) == 0x0);

if (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&  !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1))
		card->ext_csd.ffu_capable = true;

> +		card->ext_csd.ffu_mode_op = ext_csd[EXT_CSD_FFU_FEATURES];
> +	} else {
> +		card->ext_csd.ffu_capable = false;

Can be set to false by default before checking whether card is eMMC v5.0 or not.

card->ext_csd.ffu_capable = false;

if (card->ext_csd.rev >= 7) {
	...
}

Best Regards,
Jaehoon Chung

> +	}
>  out:
>  	return err;
>  }
> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> index d424b9d..dd01efe 100644
> --- a/include/linux/mmc/card.h
> +++ b/include/linux/mmc/card.h
> @@ -81,6 +81,8 @@ struct mmc_ext_csd {
>  	bool			hpi_en;			/* HPI enablebit */
>  	bool			hpi;			/* HPI support bit */
>  	unsigned int		hpi_cmd;		/* cmd used as HPI */
> +	bool			ffu_capable;		/* FFU support */
> +	bool			ffu_mode_op;		/* FFU mode operation */
>  	bool			bkops;		/* background support bit */
>  	bool			bkops_en;	/* background enable bit */
>  	unsigned int            data_sector_size;       /* 512 bytes or 4KB */
> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
> index 64ec963..787787b 100644
> --- a/include/linux/mmc/mmc.h
> +++ b/include/linux/mmc/mmc.h
> @@ -272,6 +272,9 @@ struct _mmc_csd {
>   * EXT_CSD fields
>   */
>  
> +#define EXT_CSD_FFU_STATUS		26	/* R */
> +#define EXT_CSD_MODE_OPERATION_CODES	29	/* W */
> +#define EXT_CSD_MODE_CONFIG		30	/* R/W */
>  #define EXT_CSD_FLUSH_CACHE		32      /* W */
>  #define EXT_CSD_CACHE_CTRL		33      /* R/W */
>  #define EXT_CSD_POWER_OFF_NOTIFICATION	34	/* R/W */
> @@ -290,6 +293,7 @@ struct _mmc_csd {
>  #define EXT_CSD_SANITIZE_START		165     /* W */
>  #define EXT_CSD_WR_REL_PARAM		166	/* RO */
>  #define EXT_CSD_RPMB_MULT		168	/* RO */
> +#define EXT_CSD_FW_CONFIG		169	/* R/W */
>  #define EXT_CSD_BOOT_WP			173	/* R/W */
>  #define EXT_CSD_ERASE_GROUP_DEF		175	/* R/W */
>  #define EXT_CSD_PART_CONFIG		179	/* R/W */
> @@ -326,6 +330,11 @@ struct _mmc_csd {
>  #define EXT_CSD_GENERIC_CMD6_TIME	248	/* RO */
>  #define EXT_CSD_CACHE_SIZE		249	/* RO, 4 bytes */
>  #define EXT_CSD_PWR_CL_DDR_200_360	253	/* RO */
> +#define EXT_CSD_NUM_OF_FW_SEC_PROG	302	/* RO, 4 bytes */
> +#define EXT_CSD_FFU_ARG			487	/* RO, 4 bytes */
> +#define EXT_CSD_OPERATION_CODE_TIMEOUT	491	/* RO */
> +#define EXT_CSD_FFU_FEATURES		492	/* RO */
> +#define EXT_CSD_SUPPORTED_MODE		493	/* RO */
>  #define EXT_CSD_TAG_UNIT_SIZE		498	/* RO */
>  #define EXT_CSD_DATA_TAG_SUPPORT	499	/* RO */
>  #define EXT_CSD_MAX_PACKED_WRITES	500	/* RO */
> 

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