[u-boot.git] / drivers / fastboot / fb_mmc.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2014 Broadcom Corporation.
 */

#include <config.h>
#include <common.h>
#include <blk.h>
#include <env.h>
#include <fastboot.h>
#include <fastboot-internal.h>
#include <fb_mmc.h>
#include <image-sparse.h>
#include <part.h>
#include <mmc.h>
#include <div64.h>
#include <linux/compat.h>
#include <android_image.h>

#define FASTBOOT_MAX_BLK_WRITE 16384

#define BOOT_PARTITION_NAME "boot"

struct fb_mmc_sparse {
	struct blk_desc	*dev_desc;
};

static int part_get_info_by_name_or_alias(struct blk_desc *dev_desc,
		const char *name, disk_partition_t *info)
{
	int ret;

	ret = part_get_info_by_name(dev_desc, name, info);
	if (ret < 0) {
		/* strlen("fastboot_partition_alias_") + PART_NAME_LEN + 1 */
		char env_alias_name[25 + PART_NAME_LEN + 1];
		char *aliased_part_name;

		/* check for alias */
		strcpy(env_alias_name, "fastboot_partition_alias_");
		strncat(env_alias_name, name, PART_NAME_LEN);
		aliased_part_name = env_get(env_alias_name);
		if (aliased_part_name != NULL)
			ret = part_get_info_by_name(dev_desc,
					aliased_part_name, info);
	}
	return ret;
}

/**
 * fb_mmc_blk_write() - Write/erase MMC in chunks of FASTBOOT_MAX_BLK_WRITE
 *
 * @block_dev: Pointer to block device
 * @start: First block to write/erase
 * @blkcnt: Count of blocks
 * @buffer: Pointer to data buffer for write or NULL for erase
 */
static lbaint_t fb_mmc_blk_write(struct blk_desc *block_dev, lbaint_t start,
				 lbaint_t blkcnt, const void *buffer)
{
	lbaint_t blk = start;
	lbaint_t blks_written;
	lbaint_t cur_blkcnt;
	lbaint_t blks = 0;
	int i;

	for (i = 0; i < blkcnt; i += FASTBOOT_MAX_BLK_WRITE) {
		cur_blkcnt = min((int)blkcnt - i, FASTBOOT_MAX_BLK_WRITE);
		if (buffer) {
			if (fastboot_progress_callback)
				fastboot_progress_callback("writing");
			blks_written = blk_dwrite(block_dev, blk, cur_blkcnt,
						  buffer + (i * block_dev->blksz));
		} else {
			if (fastboot_progress_callback)
				fastboot_progress_callback("erasing");
			blks_written = blk_derase(block_dev, blk, cur_blkcnt);
		}
		blk += blks_written;
		blks += blks_written;
	}
	return blks;
}

static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
		lbaint_t blk, lbaint_t blkcnt, const void *buffer)
{
	struct fb_mmc_sparse *sparse = info->priv;
	struct blk_desc *dev_desc = sparse->dev_desc;

	return fb_mmc_blk_write(dev_desc, blk, blkcnt, buffer);
}

static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
		lbaint_t blk, lbaint_t blkcnt)
{
	return blkcnt;
}

static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
		const char *part_name, void *buffer,
		u32 download_bytes, char *response)
{
	lbaint_t blkcnt;
	lbaint_t blks;

	/* determine number of blocks to write */
	blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
	blkcnt = lldiv(blkcnt, info->blksz);

	if (blkcnt > info->size) {
		pr_err("too large for partition: '%s'\n", part_name);
		fastboot_fail("too large for partition", response);
		return;
	}

	puts("Flashing Raw Image\n");

	blks = fb_mmc_blk_write(dev_desc, info->start, blkcnt, buffer);

	if (blks != blkcnt) {
		pr_err("failed writing to device %d\n", dev_desc->devnum);
		fastboot_fail("failed writing to device", response);
		return;
	}

	printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
	       part_name);
	fastboot_okay(NULL, response);
}

#ifdef CONFIG_ANDROID_BOOT_IMAGE
/**
 * Read Android boot image header from boot partition.
 *
 * @param[in] dev_desc MMC device descriptor
 * @param[in] info Boot partition info
 * @param[out] hdr Where to store read boot image header
 *
 * @return Boot image header sectors count or 0 on error
 */
static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
				       disk_partition_t *info,
				       struct andr_img_hdr *hdr,
				       char *response)
{
	ulong sector_size;		/* boot partition sector size */
	lbaint_t hdr_sectors;		/* boot image header sectors count */
	int res;

	/* Calculate boot image sectors count */
	sector_size = info->blksz;
	hdr_sectors = DIV_ROUND_UP(sizeof(struct andr_img_hdr), sector_size);
	if (hdr_sectors == 0) {
		pr_err("invalid number of boot sectors: 0\n");
		fastboot_fail("invalid number of boot sectors: 0", response);
		return 0;
	}

	/* Read the boot image header */
	res = blk_dread(dev_desc, info->start, hdr_sectors, (void *)hdr);
	if (res != hdr_sectors) {
		pr_err("cannot read header from boot partition\n");
		fastboot_fail("cannot read header from boot partition",
			      response);
		return 0;
	}

	/* Check boot header magic string */
	res = android_image_check_header(hdr);
	if (res != 0) {
		pr_err("bad boot image magic\n");
		fastboot_fail("boot partition not initialized", response);
		return 0;
	}

	return hdr_sectors;
}

/**
 * Write downloaded zImage to boot partition and repack it properly.
 *
 * @param dev_desc MMC device descriptor
 * @param download_buffer Address to fastboot buffer with zImage in it
 * @param download_bytes Size of fastboot buffer, in bytes
 *
 * @return 0 on success or -1 on error
 */
static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
				void *download_buffer,
				u32 download_bytes,
				char *response)
{
	uintptr_t hdr_addr;			/* boot image header address */
	struct andr_img_hdr *hdr;		/* boot image header */
	lbaint_t hdr_sectors;			/* boot image header sectors */
	u8 *ramdisk_buffer;
	u32 ramdisk_sector_start;
	u32 ramdisk_sectors;
	u32 kernel_sector_start;
	u32 kernel_sectors;
	u32 sectors_per_page;
	disk_partition_t info;
	int res;

	puts("Flashing zImage\n");

	/* Get boot partition info */
	res = part_get_info_by_name(dev_desc, BOOT_PARTITION_NAME, &info);
	if (res < 0) {
		pr_err("cannot find boot partition\n");
		fastboot_fail("cannot find boot partition", response);
		return -1;
	}

	/* Put boot image header in fastboot buffer after downloaded zImage */
	hdr_addr = (uintptr_t)download_buffer + ALIGN(download_bytes, PAGE_SIZE);
	hdr = (struct andr_img_hdr *)hdr_addr;

	/* Read boot image header */
	hdr_sectors = fb_mmc_get_boot_header(dev_desc, &info, hdr, response);
	if (hdr_sectors == 0) {
		pr_err("unable to read boot image header\n");
		fastboot_fail("unable to read boot image header", response);
		return -1;
	}

	/* Check if boot image has second stage in it (we don't support it) */
	if (hdr->second_size > 0) {
		pr_err("moving second stage is not supported yet\n");
		fastboot_fail("moving second stage is not supported yet",
			      response);
		return -1;
	}

	/* Extract ramdisk location */
	sectors_per_page = hdr->page_size / info.blksz;
	ramdisk_sector_start = info.start + sectors_per_page;
	ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
					     sectors_per_page;
	ramdisk_sectors = DIV_ROUND_UP(hdr->ramdisk_size, hdr->page_size) *
				       sectors_per_page;

	/* Read ramdisk and put it in fastboot buffer after boot image header */
	ramdisk_buffer = (u8 *)hdr + (hdr_sectors * info.blksz);
	res = blk_dread(dev_desc, ramdisk_sector_start, ramdisk_sectors,
			ramdisk_buffer);
	if (res != ramdisk_sectors) {
		pr_err("cannot read ramdisk from boot partition\n");
		fastboot_fail("cannot read ramdisk from boot partition",
			      response);
		return -1;
	}

	/* Write new kernel size to boot image header */
	hdr->kernel_size = download_bytes;
	res = blk_dwrite(dev_desc, info.start, hdr_sectors, (void *)hdr);
	if (res == 0) {
		pr_err("cannot writeback boot image header\n");
		fastboot_fail("cannot write back boot image header", response);
		return -1;
	}

	/* Write the new downloaded kernel */
	kernel_sector_start = info.start + sectors_per_page;
	kernel_sectors = DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
				      sectors_per_page;
	res = blk_dwrite(dev_desc, kernel_sector_start, kernel_sectors,
			 download_buffer);
	if (res == 0) {
		pr_err("cannot write new kernel\n");
		fastboot_fail("cannot write new kernel", response);
		return -1;
	}

	/* Write the saved ramdisk back */
	ramdisk_sector_start = info.start + sectors_per_page;
	ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
					     sectors_per_page;
	res = blk_dwrite(dev_desc, ramdisk_sector_start, ramdisk_sectors,
			 ramdisk_buffer);
	if (res == 0) {
		pr_err("cannot write back original ramdisk\n");
		fastboot_fail("cannot write back original ramdisk", response);
		return -1;
	}

	puts("........ zImage was updated in boot partition\n");
	fastboot_okay(NULL, response);
	return 0;
}
#endif

/**
 * fastboot_mmc_get_part_info() - Lookup eMMC partion by name
 *
 * @part_name: Named partition to lookup
 * @dev_desc: Pointer to returned blk_desc pointer
 * @part_info: Pointer to returned disk_partition_t
 * @response: Pointer to fastboot response buffer
 */
int fastboot_mmc_get_part_info(const char *part_name,
			       struct blk_desc **dev_desc,
			       disk_partition_t *part_info, char *response)
{
	int r;

	*dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
	if (!*dev_desc) {
		fastboot_fail("block device not found", response);
		return -ENOENT;
	}
	if (!part_name || !strcmp(part_name, "")) {
		fastboot_fail("partition not given", response);
		return -ENOENT;
	}

	r = part_get_info_by_name_or_alias(*dev_desc, part_name, part_info);
	if (r < 0) {
		fastboot_fail("partition not found", response);
		return r;
	}

	return r;
}

/**
 * fastboot_mmc_flash_write() - Write image to eMMC for fastboot
 *
 * @cmd: Named partition to write image to
 * @download_buffer: Pointer to image data
 * @download_bytes: Size of image data
 * @response: Pointer to fastboot response buffer
 */
void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
			      u32 download_bytes, char *response)
{
	struct blk_desc *dev_desc;
	disk_partition_t info;

	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
		pr_err("invalid mmc device\n");
		fastboot_fail("invalid mmc device", response);
		return;
	}

#if CONFIG_IS_ENABLED(EFI_PARTITION)
	if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
		printf("%s: updating MBR, Primary and Backup GPT(s)\n",
		       __func__);
		if (is_valid_gpt_buf(dev_desc, download_buffer)) {
			printf("%s: invalid GPT - refusing to write to flash\n",
			       __func__);
			fastboot_fail("invalid GPT partition", response);
			return;
		}
		if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
			printf("%s: writing GPT partitions failed\n", __func__);
			fastboot_fail("writing GPT partitions failed",
				      response);
			return;
		}
		printf("........ success\n");
		fastboot_okay(NULL, response);
		return;
	}
#endif

#if CONFIG_IS_ENABLED(DOS_PARTITION)
	if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) {
		printf("%s: updating MBR\n", __func__);
		if (is_valid_dos_buf(download_buffer)) {
			printf("%s: invalid MBR - refusing to write to flash\n",
			       __func__);
			fastboot_fail("invalid MBR partition", response);
			return;
		}
		if (write_mbr_partition(dev_desc, download_buffer)) {
			printf("%s: writing MBR partition failed\n", __func__);
			fastboot_fail("writing MBR partition failed",
				      response);
			return;
		}
		printf("........ success\n");
		fastboot_okay(NULL, response);
		return;
	}
#endif

#ifdef CONFIG_ANDROID_BOOT_IMAGE
	if (strncasecmp(cmd, "zimage", 6) == 0) {
		fb_mmc_update_zimage(dev_desc, download_buffer,
				     download_bytes, response);
		return;
	}
#endif

	if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
		pr_err("cannot find partition: '%s'\n", cmd);
		fastboot_fail("cannot find partition", response);
		return;
	}

	if (is_sparse_image(download_buffer)) {
		struct fb_mmc_sparse sparse_priv;
		struct sparse_storage sparse;
		int err;

		sparse_priv.dev_desc = dev_desc;

		sparse.blksz = info.blksz;
		sparse.start = info.start;
		sparse.size = info.size;
		sparse.write = fb_mmc_sparse_write;
		sparse.reserve = fb_mmc_sparse_reserve;
		sparse.mssg = fastboot_fail;

		printf("Flashing sparse image at offset " LBAFU "\n",
		       sparse.start);

		sparse.priv = &sparse_priv;
		err = write_sparse_image(&sparse, cmd, download_buffer,
					 response);
		if (!err)
			fastboot_okay(NULL, response);
	} else {
		write_raw_image(dev_desc, &info, cmd, download_buffer,
				download_bytes, response);
	}
}

/**
 * fastboot_mmc_flash_erase() - Erase eMMC for fastboot
 *
 * @cmd: Named partition to erase
 * @response: Pointer to fastboot response buffer
 */
void fastboot_mmc_erase(const char *cmd, char *response)
{
	int ret;
	struct blk_desc *dev_desc;
	disk_partition_t info;
	lbaint_t blks, blks_start, blks_size, grp_size;
	struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);

	if (mmc == NULL) {
		pr_err("invalid mmc device\n");
		fastboot_fail("invalid mmc device", response);
		return;
	}

	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
		pr_err("invalid mmc device\n");
		fastboot_fail("invalid mmc device", response);
		return;
	}

	ret = part_get_info_by_name_or_alias(dev_desc, cmd, &info);
	if (ret < 0) {
		pr_err("cannot find partition: '%s'\n", cmd);
		fastboot_fail("cannot find partition", response);
		return;
	}

	/* Align blocks to erase group size to avoid erasing other partitions */
	grp_size = mmc->erase_grp_size;
	blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
	if (info.size >= grp_size)
		blks_size = (info.size - (blks_start - info.start)) &
				(~(grp_size - 1));
	else
		blks_size = 0;

	printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
	       blks_start, blks_start + blks_size);

	blks = fb_mmc_blk_write(dev_desc, blks_start, blks_size, NULL);

	if (blks != blks_size) {
		pr_err("failed erasing from device %d\n", dev_desc->devnum);
		fastboot_fail("failed erasing from device", response);
		return;
	}

	printf("........ erased " LBAFU " bytes from '%s'\n",
	       blks_size * info.blksz, cmd);
	fastboot_okay(NULL, response);
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
c0aebb33 SR	2	/*
c0aebb33 SR	3	* Copyright 2014 Broadcom Corporation.
c0aebb33 SR	4	*/
c0aebb33 SR	5
0ff7e585	6	#include <config.h>
c0aebb33	7	#include <common.h>
2a981dc2	8	#include <blk.h>
7b51b576	9	#include <env.h>
3c8f98f5	10	#include <fastboot.h>
f73a7df9	11	#include <fastboot-internal.h>
c0aebb33	12	#include <fb_mmc.h>
3d4ef38d	13	#include <image-sparse.h>
c0aebb33	14	#include <part.h>
89792381	15	#include <mmc.h>
5e0efc1b	16	#include <div64.h>
efeccfe7 SP	17	#include <linux/compat.h>
efeccfe7 SP	18	#include <android_image.h>
c0aebb33	19
f73a7df9 AK	20	#define FASTBOOT_MAX_BLK_WRITE 16384
f73a7df9 AK	21
efeccfe7 SP	22	#define BOOT_PARTITION_NAME "boot"
efeccfe7 SP	23
a5d1e04a	24	struct fb_mmc_sparse {
4101f687	25	struct blk_desc *dev_desc;
a5d1e04a MR	26	};
a5d1e04a MR	27
b6dd69a4	28	static int part_get_info_by_name_or_alias(struct blk_desc *dev_desc,
8a41802f MS	29	const char name, disk_partition_t info)
	30	{
	31	int ret;
	32
87b8530f	33	ret = part_get_info_by_name(dev_desc, name, info);
88b6329c	34	if (ret < 0) {
b762aa12 AK	35	/* strlen("fastboot_partition_alias_") + PART_NAME_LEN + 1 */
b762aa12 AK	36	char env_alias_name[25 + PART_NAME_LEN + 1];
8a41802f MS	37	char *aliased_part_name;
	38
	39	/* check for alias */
	40	strcpy(env_alias_name, "fastboot_partition_alias_");
b762aa12	41	strncat(env_alias_name, name, PART_NAME_LEN);
00caae6d	42	aliased_part_name = env_get(env_alias_name);
8a41802f	43	if (aliased_part_name != NULL)
87b8530f	44	ret = part_get_info_by_name(dev_desc,
8a41802f MS	45	aliased_part_name, info);
	46	}
	47	return ret;
	48	}
	49
f73a7df9 AK	50	/**
	51	* fb_mmc_blk_write() - Write/erase MMC in chunks of FASTBOOT_MAX_BLK_WRITE
	52	*
	53	* @block_dev: Pointer to block device
	54	* @start: First block to write/erase
	55	* @blkcnt: Count of blocks
	56	* @buffer: Pointer to data buffer for write or NULL for erase
	57	*/
	58	static lbaint_t fb_mmc_blk_write(struct blk_desc *block_dev, lbaint_t start,
	59	lbaint_t blkcnt, const void *buffer)
	60	{
	61	lbaint_t blk = start;
	62	lbaint_t blks_written;
	63	lbaint_t cur_blkcnt;
	64	lbaint_t blks = 0;
	65	int i;
	66
	67	for (i = 0; i < blkcnt; i += FASTBOOT_MAX_BLK_WRITE) {
	68	cur_blkcnt = min((int)blkcnt - i, FASTBOOT_MAX_BLK_WRITE);
	69	if (buffer) {
	70	if (fastboot_progress_callback)
	71	fastboot_progress_callback("writing");
	72	blks_written = blk_dwrite(block_dev, blk, cur_blkcnt,
	73	buffer + (i * block_dev->blksz));
	74	} else {
	75	if (fastboot_progress_callback)
	76	fastboot_progress_callback("erasing");
	77	blks_written = blk_derase(block_dev, blk, cur_blkcnt);
	78	}
	79	blk += blks_written;
	80	blks += blks_written;
	81	}
	82	return blks;
	83	}
	84
cc0f08cd SR	85	static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
cc0f08cd SR	86	lbaint_t blk, lbaint_t blkcnt, const void *buffer)
a5d1e04a	87	{
cc0f08cd	88	struct fb_mmc_sparse *sparse = info->priv;
4101f687	89	struct blk_desc *dev_desc = sparse->dev_desc;
a5d1e04a	90
f73a7df9	91	return fb_mmc_blk_write(dev_desc, blk, blkcnt, buffer);
a5d1e04a MR	92	}
a5d1e04a MR	93
2c724046 SR	94	static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
	95	lbaint_t blk, lbaint_t blkcnt)
	96	{
	97	return blkcnt;
	98	}
	99
4101f687	100	static void write_raw_image(struct blk_desc dev_desc, disk_partition_t info,
c0aebb33	101	const char part_name, void buffer,
f73a7df9	102	u32 download_bytes, char *response)
c0aebb33 SR	103	{
	104	lbaint_t blkcnt;
	105	lbaint_t blks;
	106
	107	/* determine number of blocks to write */
	108	blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
5e0efc1b	109	blkcnt = lldiv(blkcnt, info->blksz);
c0aebb33 SR	110
c0aebb33 SR	111	if (blkcnt > info->size) {
9b643e31	112	pr_err("too large for partition: '%s'\n", part_name);
c4ded03e	113	fastboot_fail("too large for partition", response);
c0aebb33 SR	114	return;
	115	}
	116
	117	puts("Flashing Raw Image\n");
	118
f73a7df9 AK	119	blks = fb_mmc_blk_write(dev_desc, info->start, blkcnt, buffer);
f73a7df9 AK	120
c0aebb33	121	if (blks != blkcnt) {
9b643e31	122	pr_err("failed writing to device %d\n", dev_desc->devnum);
c4ded03e	123	fastboot_fail("failed writing to device", response);
c0aebb33 SR	124	return;
	125	}
	126
	127	printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
	128	part_name);
c4ded03e	129	fastboot_okay(NULL, response);
c0aebb33 SR	130	}
c0aebb33 SR	131
efeccfe7 SP	132	#ifdef CONFIG_ANDROID_BOOT_IMAGE
	133	/**
	134	* Read Android boot image header from boot partition.
	135	*
	136	* @param[in] dev_desc MMC device descriptor
	137	* @param[in] info Boot partition info
	138	* @param[out] hdr Where to store read boot image header
	139	*
	140	* @return Boot image header sectors count or 0 on error
	141	*/
	142	static lbaint_t fb_mmc_get_boot_header(struct blk_desc *dev_desc,
	143	disk_partition_t *info,
c4ded03e AK	144	struct andr_img_hdr *hdr,
c4ded03e AK	145	char *response)
efeccfe7 SP	146	{
	147	ulong sector_size; /* boot partition sector size */
	148	lbaint_t hdr_sectors; /* boot image header sectors count */
	149	int res;
	150
	151	/* Calculate boot image sectors count */
	152	sector_size = info->blksz;
	153	hdr_sectors = DIV_ROUND_UP(sizeof(struct andr_img_hdr), sector_size);
	154	if (hdr_sectors == 0) {
1ad5facb	155	pr_err("invalid number of boot sectors: 0\n");
c4ded03e	156	fastboot_fail("invalid number of boot sectors: 0", response);
efeccfe7 SP	157	return 0;
	158	}
	159
	160	/* Read the boot image header */
	161	res = blk_dread(dev_desc, info->start, hdr_sectors, (void *)hdr);
6bafa5a4	162	if (res != hdr_sectors) {
1ad5facb	163	pr_err("cannot read header from boot partition\n");
c4ded03e AK	164	fastboot_fail("cannot read header from boot partition",
c4ded03e AK	165	response);
efeccfe7 SP	166	return 0;
	167	}
	168
	169	/* Check boot header magic string */
	170	res = android_image_check_header(hdr);
	171	if (res != 0) {
1ad5facb	172	pr_err("bad boot image magic\n");
c4ded03e	173	fastboot_fail("boot partition not initialized", response);
efeccfe7 SP	174	return 0;
	175	}
	176
	177	return hdr_sectors;
	178	}
	179
	180	/**
	181	* Write downloaded zImage to boot partition and repack it properly.
	182	*
	183	* @param dev_desc MMC device descriptor
	184	* @param download_buffer Address to fastboot buffer with zImage in it
	185	* @param download_bytes Size of fastboot buffer, in bytes
	186	*
	187	* @return 0 on success or -1 on error
	188	*/
	189	static int fb_mmc_update_zimage(struct blk_desc *dev_desc,
	190	void *download_buffer,
f73a7df9	191	u32 download_bytes,
c4ded03e	192	char *response)
efeccfe7	193	{
2341c80c	194	uintptr_t hdr_addr; /* boot image header address */
efeccfe7 SP	195	struct andr_img_hdr hdr; / boot image header */
	196	lbaint_t hdr_sectors; /* boot image header sectors */
	197	u8 *ramdisk_buffer;
	198	u32 ramdisk_sector_start;
	199	u32 ramdisk_sectors;
	200	u32 kernel_sector_start;
	201	u32 kernel_sectors;
	202	u32 sectors_per_page;
	203	disk_partition_t info;
	204	int res;
	205
	206	puts("Flashing zImage\n");
	207
	208	/* Get boot partition info */
	209	res = part_get_info_by_name(dev_desc, BOOT_PARTITION_NAME, &info);
	210	if (res < 0) {
1ad5facb	211	pr_err("cannot find boot partition\n");
c4ded03e	212	fastboot_fail("cannot find boot partition", response);
efeccfe7 SP	213	return -1;
	214	}
	215
	216	/* Put boot image header in fastboot buffer after downloaded zImage */
2341c80c	217	hdr_addr = (uintptr_t)download_buffer + ALIGN(download_bytes, PAGE_SIZE);
efeccfe7 SP	218	hdr = (struct andr_img_hdr *)hdr_addr;
	219
	220	/* Read boot image header */
c4ded03e	221	hdr_sectors = fb_mmc_get_boot_header(dev_desc, &info, hdr, response);
efeccfe7	222	if (hdr_sectors == 0) {
1ad5facb	223	pr_err("unable to read boot image header\n");
c4ded03e	224	fastboot_fail("unable to read boot image header", response);
efeccfe7 SP	225	return -1;
	226	}
	227
	228	/* Check if boot image has second stage in it (we don't support it) */
	229	if (hdr->second_size > 0) {
1ad5facb	230	pr_err("moving second stage is not supported yet\n");
c4ded03e AK	231	fastboot_fail("moving second stage is not supported yet",
c4ded03e AK	232	response);
efeccfe7 SP	233	return -1;
	234	}
	235
	236	/* Extract ramdisk location */
	237	sectors_per_page = hdr->page_size / info.blksz;
	238	ramdisk_sector_start = info.start + sectors_per_page;
	239	ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
	240	sectors_per_page;
	241	ramdisk_sectors = DIV_ROUND_UP(hdr->ramdisk_size, hdr->page_size) *
	242	sectors_per_page;
	243
	244	/* Read ramdisk and put it in fastboot buffer after boot image header */
	245	ramdisk_buffer = (u8 )hdr + (hdr_sectors info.blksz);
	246	res = blk_dread(dev_desc, ramdisk_sector_start, ramdisk_sectors,
	247	ramdisk_buffer);
6bafa5a4	248	if (res != ramdisk_sectors) {
1ad5facb	249	pr_err("cannot read ramdisk from boot partition\n");
c4ded03e AK	250	fastboot_fail("cannot read ramdisk from boot partition",
c4ded03e AK	251	response);
efeccfe7 SP	252	return -1;
	253	}
	254
	255	/* Write new kernel size to boot image header */
	256	hdr->kernel_size = download_bytes;
	257	res = blk_dwrite(dev_desc, info.start, hdr_sectors, (void *)hdr);
	258	if (res == 0) {
1ad5facb	259	pr_err("cannot writeback boot image header\n");
c4ded03e	260	fastboot_fail("cannot write back boot image header", response);
efeccfe7 SP	261	return -1;
	262	}
	263
	264	/* Write the new downloaded kernel */
	265	kernel_sector_start = info.start + sectors_per_page;
	266	kernel_sectors = DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
	267	sectors_per_page;
	268	res = blk_dwrite(dev_desc, kernel_sector_start, kernel_sectors,
	269	download_buffer);
	270	if (res == 0) {
1ad5facb	271	pr_err("cannot write new kernel\n");
c4ded03e	272	fastboot_fail("cannot write new kernel", response);
efeccfe7 SP	273	return -1;
	274	}
	275
	276	/* Write the saved ramdisk back */
	277	ramdisk_sector_start = info.start + sectors_per_page;
	278	ramdisk_sector_start += DIV_ROUND_UP(hdr->kernel_size, hdr->page_size) *
	279	sectors_per_page;
	280	res = blk_dwrite(dev_desc, ramdisk_sector_start, ramdisk_sectors,
	281	ramdisk_buffer);
	282	if (res == 0) {
1ad5facb	283	pr_err("cannot write back original ramdisk\n");
c4ded03e	284	fastboot_fail("cannot write back original ramdisk", response);
efeccfe7 SP	285	return -1;
	286	}
	287
	288	puts("........ zImage was updated in boot partition\n");
c4ded03e	289	fastboot_okay(NULL, response);
efeccfe7 SP	290	return 0;
	291	}
	292	#endif
	293
f73a7df9 AK	294	/**
	295	* fastboot_mmc_get_part_info() - Lookup eMMC partion by name
	296	*
	297	* @part_name: Named partition to lookup
	298	* @dev_desc: Pointer to returned blk_desc pointer
	299	* @part_info: Pointer to returned disk_partition_t
	300	* @response: Pointer to fastboot response buffer
	301	*/
cacb03e4 SP	302	int fastboot_mmc_get_part_info(const char *part_name,
cacb03e4 SP	303	struct blk_desc **dev_desc,
f73a7df9 AK	304	disk_partition_t part_info, char response)
	305	{
	306	int r;
	307
	308	*dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
	309	if (!*dev_desc) {
	310	fastboot_fail("block device not found", response);
	311	return -ENOENT;
	312	}
a40297d7 ER	313	if (!part_name \|\| !strcmp(part_name, "")) {
a40297d7 ER	314	fastboot_fail("partition not given", response);
f73a7df9 AK	315	return -ENOENT;
	316	}
	317
	318	r = part_get_info_by_name_or_alias(*dev_desc, part_name, part_info);
	319	if (r < 0) {
	320	fastboot_fail("partition not found", response);
	321	return r;
	322	}
	323
	324	return r;
	325	}
	326
d1a119d4 AK	327	/**
	328	* fastboot_mmc_flash_write() - Write image to eMMC for fastboot
	329	*
	330	* @cmd: Named partition to write image to
	331	* @download_buffer: Pointer to image data
	332	* @download_bytes: Size of image data
	333	* @response: Pointer to fastboot response buffer
	334	*/
	335	void fastboot_mmc_flash_write(const char cmd, void download_buffer,
f73a7df9	336	u32 download_bytes, char *response)
c0aebb33	337	{
4101f687	338	struct blk_desc *dev_desc;
c0aebb33 SR	339	disk_partition_t info;
c0aebb33 SR	340
db1d9e78	341	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
c0aebb33	342	if (!dev_desc \|\| dev_desc->type == DEV_TYPE_UNKNOWN) {
9b643e31	343	pr_err("invalid mmc device\n");
c4ded03e	344	fastboot_fail("invalid mmc device", response);
c0aebb33 SR	345	return;
	346	}
	347
bd42a942	348	#if CONFIG_IS_ENABLED(EFI_PARTITION)
0ff7e585 SR	349	if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
	350	printf("%s: updating MBR, Primary and Backup GPT(s)\n",
	351	__func__);
	352	if (is_valid_gpt_buf(dev_desc, download_buffer)) {
	353	printf("%s: invalid GPT - refusing to write to flash\n",
	354	__func__);
c4ded03e	355	fastboot_fail("invalid GPT partition", response);
0ff7e585 SR	356	return;
	357	}
	358	if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
	359	printf("%s: writing GPT partitions failed\n", __func__);
c4ded03e AK	360	fastboot_fail("writing GPT partitions failed",
c4ded03e AK	361	response);
0ff7e585 SR	362	return;
	363	}
	364	printf("........ success\n");
c4ded03e	365	fastboot_okay(NULL, response);
0ff7e585	366	return;
b6dd69a4 PK	367	}
	368	#endif
	369
b0cf7339	370	#if CONFIG_IS_ENABLED(DOS_PARTITION)
b6dd69a4 PK	371	if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) {
	372	printf("%s: updating MBR\n", __func__);
	373	if (is_valid_dos_buf(download_buffer)) {
	374	printf("%s: invalid MBR - refusing to write to flash\n",
	375	__func__);
c4ded03e	376	fastboot_fail("invalid MBR partition", response);
b6dd69a4 PK	377	return;
	378	}
	379	if (write_mbr_partition(dev_desc, download_buffer)) {
	380	printf("%s: writing MBR partition failed\n", __func__);
c4ded03e AK	381	fastboot_fail("writing MBR partition failed",
c4ded03e AK	382	response);
b6dd69a4 PK	383	return;
	384	}
	385	printf("........ success\n");
c4ded03e	386	fastboot_okay(NULL, response);
b6dd69a4 PK	387	return;
	388	}
	389	#endif
	390
efeccfe7 SP	391	#ifdef CONFIG_ANDROID_BOOT_IMAGE
efeccfe7 SP	392	if (strncasecmp(cmd, "zimage", 6) == 0) {
c4ded03e AK	393	fb_mmc_update_zimage(dev_desc, download_buffer,
c4ded03e AK	394	download_bytes, response);
efeccfe7 SP	395	return;
	396	}
	397	#endif
	398
88b6329c	399	if (part_get_info_by_name_or_alias(dev_desc, cmd, &info) < 0) {
9b643e31	400	pr_err("cannot find partition: '%s'\n", cmd);
c4ded03e	401	fastboot_fail("cannot find partition", response);
c0aebb33 SR	402	return;
	403	}
	404
a5d1e04a MR	405	if (is_sparse_image(download_buffer)) {
a5d1e04a MR	406	struct fb_mmc_sparse sparse_priv;
cc0f08cd	407	struct sparse_storage sparse;
2f83f219	408	int err;
a5d1e04a MR	409
	410	sparse_priv.dev_desc = dev_desc;
	411
cc0f08cd	412	sparse.blksz = info.blksz;
a5d1e04a MR	413	sparse.start = info.start;
a5d1e04a MR	414	sparse.size = info.size;
a5d1e04a	415	sparse.write = fb_mmc_sparse_write;
2c724046	416	sparse.reserve = fb_mmc_sparse_reserve;
2f83f219	417	sparse.mssg = fastboot_fail;
a5d1e04a MR	418
a5d1e04a MR	419	printf("Flashing sparse image at offset " LBAFU "\n",
cc0f08cd	420	sparse.start);
a5d1e04a	421
cc0f08cd	422	sparse.priv = &sparse_priv;
c4ded03e AK	423	err = write_sparse_image(&sparse, cmd, download_buffer,
c4ded03e AK	424	response);
2f83f219	425	if (!err)
c4ded03e	426	fastboot_okay(NULL, response);
a5d1e04a	427	} else {
e5bf9878	428	write_raw_image(dev_desc, &info, cmd, download_buffer,
c4ded03e	429	download_bytes, response);
a5d1e04a	430	}
c0aebb33	431	}
89792381	432
d1a119d4 AK	433	/**
	434	* fastboot_mmc_flash_erase() - Erase eMMC for fastboot
	435	*
	436	* @cmd: Named partition to erase
	437	* @response: Pointer to fastboot response buffer
	438	*/
	439	void fastboot_mmc_erase(const char cmd, char response)
89792381 DK	440	{
89792381 DK	441	int ret;
4101f687	442	struct blk_desc *dev_desc;
89792381 DK	443	disk_partition_t info;
	444	lbaint_t blks, blks_start, blks_size, grp_size;
	445	struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
	446
	447	if (mmc == NULL) {
1ad5facb	448	pr_err("invalid mmc device\n");
c4ded03e	449	fastboot_fail("invalid mmc device", response);
89792381 DK	450	return;
	451	}
	452
db1d9e78	453	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
89792381	454	if (!dev_desc \|\| dev_desc->type == DEV_TYPE_UNKNOWN) {
1ad5facb	455	pr_err("invalid mmc device\n");
c4ded03e	456	fastboot_fail("invalid mmc device", response);
89792381 DK	457	return;
	458	}
	459
b6dd69a4	460	ret = part_get_info_by_name_or_alias(dev_desc, cmd, &info);
88b6329c	461	if (ret < 0) {
1ad5facb	462	pr_err("cannot find partition: '%s'\n", cmd);
c4ded03e	463	fastboot_fail("cannot find partition", response);
89792381 DK	464	return;
	465	}
	466
	467	/* Align blocks to erase group size to avoid erasing other partitions */
	468	grp_size = mmc->erase_grp_size;
	469	blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
	470	if (info.size >= grp_size)
	471	blks_size = (info.size - (blks_start - info.start)) &
	472	(~(grp_size - 1));
	473	else
	474	blks_size = 0;
	475
	476	printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
	477	blks_start, blks_start + blks_size);
	478
f73a7df9 AK	479	blks = fb_mmc_blk_write(dev_desc, blks_start, blks_size, NULL);
f73a7df9 AK	480
89792381	481	if (blks != blks_size) {
1ad5facb	482	pr_err("failed erasing from device %d\n", dev_desc->devnum);
c4ded03e	483	fastboot_fail("failed erasing from device", response);
89792381 DK	484	return;
	485	}
	486
	487	printf("........ erased " LBAFU " bytes from '%s'\n",
	488	blks_size * info.blksz, cmd);
c4ded03e	489	fastboot_okay(NULL, response);
89792381	490	}