[U-Boot] [RFC PATCH 07/14] dfu: add partition support for MTD backend

[Lukasz Majewski]

Hi Patrick,

> Add the support of MTD partition for the MTD backend.
> 
> The expected dfu_alt_info for one alternate on the mtd device :
> 	<name> part <part_id>
>         <name> partubi <part_id>
> 
> "partubi" also erase up to the end of the partition after write
> operation.
> 
> For example: dfu_alt_info = "spl part 1;u-boot part 2; UBI partubi 3"

As in the previous comments - please add this info to dedicated doc
entry.

> 
> U-Boot> dfu 0 mtd nand0
> 
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
> 
>  drivers/dfu/dfu_mtd.c | 78
> ++++++++++++++++++++++++++++++++++++++++++++++++++-
> include/dfu.h         |  2 ++ 2 files changed, 79 insertions(+), 1
> deletion(-)
> 
> diff --git a/drivers/dfu/dfu_mtd.c b/drivers/dfu/dfu_mtd.c
> index 1168a6e..223b0fe 100644
> --- a/drivers/dfu/dfu_mtd.c
> +++ b/drivers/dfu/dfu_mtd.c
> @@ -10,6 +10,7 @@
>  #include <common.h>
>  #include <dfu.h>
>  #include <mtd.h>
> +#include <jffs2/load_kernel.h>
>  
>  static bool mtd_is_aligned_with_block_size(struct mtd_info *mtd, u64
> size) {
> @@ -181,11 +182,49 @@ static int dfu_write_medium_mtd(struct
> dfu_entity *dfu, 
>  static int dfu_flush_medium_mtd(struct dfu_entity *dfu)
>  {
> +	struct mtd_info *mtd = dfu->data.mtd.info;
> +	int ret;
> +
> +	/* in case of ubi partition, erase rest of the partition */
> +	if (dfu->data.nand.ubi) {
> +		struct erase_info erase_op = {};
> +
> +		erase_op.mtd = dfu->data.mtd.info;
> +		erase_op.addr = round_up(dfu->data.mtd.start +
> dfu->offset +
> +					 dfu->bad_skip,
> mtd->erasesize);
> +		erase_op.len = dfu->data.mtd.start +
> dfu->data.mtd.size -
> +			       erase_op.addr;
> +		erase_op.scrub = 0;
> +
> +		while (erase_op.len) {
> +			ret = mtd_erase(mtd, &erase_op);
> +			/* Abort if its not a bad block error */
> +			if (ret != -EIO)
> +				break;
> +
> +			printf("Skipping bad block at 0x%08llx\n",
> +			       erase_op.fail_addr);
> +
> +			/* Skip bad block and continue behind it */
> +			erase_op.addr = erase_op.fail_addr +
> mtd->erasesize;
> +			erase_op.len = dfu->data.mtd.start +
> +				       dfu->data.mtd.size -
> +				       erase_op.addr;
> +		}
> +	}
>  	return 0;
>  }
>  
>  static unsigned int dfu_polltimeout_mtd(struct dfu_entity *dfu)
>  {
> +	/*
> +	 * Currently, Poll Timeout != 0 is only needed on nand
> +	 * ubi partition, as sectors which are not used need
> +	 * to be erased
> +	 */
> +	if (dfu->data.nand.ubi)
> +		return DFU_MANIFEST_POLL_TIMEOUT;
> +
>  	return DFU_DEFAULT_POLL_TIMEOUT;
>  }
>  
> @@ -194,6 +233,7 @@ int dfu_fill_entity_mtd(struct dfu_entity *dfu,
> char *devstr, char *s) char *st;
>  	struct mtd_info *mtd;
>  	bool has_pages;
> +	int ret, part;
>  
>  	mtd = get_mtd_device_nm(devstr);
>  	if (IS_ERR_OR_NULL(mtd))
> @@ -212,11 +252,47 @@ int dfu_fill_entity_mtd(struct dfu_entity *dfu,
> char *devstr, char *s) dfu->data.mtd.start = simple_strtoul(s, &s,
> 16); s++;
>  		dfu->data.mtd.size = simple_strtoul(s, &s, 16);
> +	} else if ((!strcmp(st, "part")) || (!strcmp(st,
> "partubi"))) {
> +		char mtd_id[32];
> +		struct mtd_device *mtd_dev;
> +		u8 part_num;
> +		struct part_info *pi;
> +
> +		dfu->layout = DFU_RAW_ADDR;
> +
> +		part = simple_strtoul(s, &s, 10);
> +
> +		sprintf(mtd_id, "%s,%d", devstr, part - 1);
> +		printf("using id '%s'\n", mtd_id);
> +
> +		mtdparts_init();
> +
> +		ret = find_dev_and_part(mtd_id, &mtd_dev, &part_num,
> &pi);
> +		if (ret != 0) {
> +			printf("Could not locate '%s'\n", mtd_id);
> +			return -1;

			-ENODEV maybe would be more appropriate ?

> +		}
> +
> +		dfu->data.mtd.start = pi->offset;
> +		dfu->data.mtd.size = pi->size;
> +		if (!strcmp(st, "partubi"))
> +			dfu->data.mtd.ubi = 1;
>  	} else {
> -		printf("%s: (%s) not supported!\n", __func__, st);
> +		printf("%s: Memory layout (%s) not supported!\n",
> __func__, st); return -1;
>  	}
>  
> +	if (!mtd_is_aligned_with_block_size(mtd,
> dfu->data.mtd.start)) {
> +		printf("Offset not aligned with a block (0x%x)\n",
> +		       mtd->erasesize);
> +		return -EINVAL;
> +	}
> +	if (!mtd_is_aligned_with_block_size(mtd,
> dfu->data.mtd.size)) {
> +		printf("Size not aligned with a block (0x%x)\n",
> +		       mtd->erasesize);
> +		return -EINVAL;
> +	}
> +
>  	dfu->get_medium_size = dfu_get_medium_size_mtd;
>  	dfu->read_medium = dfu_read_medium_mtd;
>  	dfu->write_medium = dfu_write_medium_mtd;
> diff --git a/include/dfu.h b/include/dfu.h
> index 924952f..a90732c 100644
> --- a/include/dfu.h
> +++ b/include/dfu.h
> @@ -62,6 +62,8 @@ struct mtd_internal_data {
>  	/* RAW programming */
>  	u64 start;
>  	u64 size;
> +	/* for ubi partition */
> +	unsigned int ubi;
>  };
>  
>  struct nand_internal_data {




Best regards,

Lukasz Majewski

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