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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2023, Linaro Limited
*/
#include <dm.h>
#include <dfu.h>
#include <fwu.h>
#include <fwu_mdata.h>
#include <log.h>
#include <malloc.h>
#include <mtd.h>
#include <uuid.h>
#include <vsprintf.h>
#include <dm/ofnode.h>
struct fwu_mtd_image_info
fwu_mtd_images[CONFIG_FWU_NUM_BANKS * CONFIG_FWU_NUM_IMAGES_PER_BANK];
static struct fwu_mtd_image_info *mtd_img_by_uuid(const char *uuidbuf)
{
int num_images = ARRAY_SIZE(fwu_mtd_images);
for (int i = 0; i < num_images; i++)
if (!strcmp(uuidbuf, fwu_mtd_images[i].uuidbuf))
return &fwu_mtd_images[i];
return NULL;
}
int fwu_mtd_get_alt_num(efi_guid_t *image_id, u8 *alt_num,
const char *mtd_dev)
{
struct fwu_mtd_image_info *mtd_img_info;
char uuidbuf[UUID_STR_LEN + 1];
fdt_addr_t offset, size = 0;
struct dfu_entity *dfu;
int i, nalt, ret;
mtd_probe_devices();
uuid_bin_to_str(image_id->b, uuidbuf, UUID_STR_FORMAT_STD);
mtd_img_info = mtd_img_by_uuid(uuidbuf);
if (!mtd_img_info) {
log_err("%s: Not found partition for image %s\n", __func__, uuidbuf);
return -ENOENT;
}
offset = mtd_img_info->start;
size = mtd_img_info->size;
ret = dfu_init_env_entities(NULL, NULL);
if (ret)
return -ENOENT;
nalt = 0;
list_for_each_entry(dfu, &dfu_list, list)
nalt++;
if (!nalt) {
log_warning("No entities in dfu_alt_info\n");
dfu_free_entities();
return -ENOENT;
}
ret = -ENOENT;
for (i = 0; i < nalt; i++) {
dfu = dfu_get_entity(i);
/* Only MTD RAW access */
if (!dfu || dfu->dev_type != DFU_DEV_MTD ||
dfu->layout != DFU_RAW_ADDR ||
dfu->data.mtd.start != offset ||
dfu->data.mtd.size != size)
continue;
*alt_num = dfu->alt;
ret = 0;
break;
}
dfu_free_entities();
log_debug("%s: %s -> %d\n", __func__, uuidbuf, *alt_num);
return ret;
}
/**
* fwu_plat_get_alt_num() - Get the DFU Alt Num for the image from the platform
* @dev: FWU device
* @image_id: Image GUID for which DFU alt number needs to be retrieved
* @alt_num: Pointer to the alt_num
*
* Get the DFU alt number from the platform for the image specified by the
* image GUID.
*
* Note: This is a weak function and platforms can override this with
* their own implementation for obtaining the alt number value.
*
* Return: 0 if OK, -ve on error
*/
__weak int fwu_plat_get_alt_num(struct udevice *dev, efi_guid_t *image_id,
u8 *alt_num)
{
return fwu_mtd_get_alt_num(image_id, alt_num, "nor1");
}
static int gen_image_alt_info(char *buf, size_t len, int sidx,
struct fwu_image_entry *img, struct mtd_info *mtd)
{
char *p = buf, *end = buf + len;
int i;
p += snprintf(p, end - p, "mtd %s", mtd->name);
if (end < p) {
log_err("%s:%d Run out of buffer\n", __func__, __LINE__);
return -E2BIG;
}
/*
* List the image banks in the FWU mdata and search the corresponding
* partition based on partition's uuid.
*/
for (i = 0; i < CONFIG_FWU_NUM_BANKS; i++) {
struct fwu_mtd_image_info *mtd_img_info;
struct fwu_image_bank_info *bank;
char uuidbuf[UUID_STR_LEN + 1];
u32 offset, size;
/* Query a partition by image UUID */
bank = &img->img_bank_info[i];
uuid_bin_to_str(bank->image_uuid.b, uuidbuf, UUID_STR_FORMAT_STD);
mtd_img_info = mtd_img_by_uuid(uuidbuf);
if (!mtd_img_info) {
log_err("%s: Not found partition for image %s\n", __func__, uuidbuf);
break;
}
offset = mtd_img_info->start;
size = mtd_img_info->size;
p += snprintf(p, end - p, "%sbank%d raw %x %x",
i == 0 ? "=" : ";", i, offset, size);
if (end < p) {
log_err("%s:%d Run out of buffer\n", __func__, __LINE__);
return -E2BIG;
}
}
if (i == CONFIG_FWU_NUM_BANKS)
return 0;
return -ENOENT;
}
int fwu_gen_alt_info_from_mtd(char *buf, size_t len, struct mtd_info *mtd)
{
struct fwu_mdata mdata;
int i, l, ret;
ret = fwu_get_mdata(&mdata);
if (ret < 0) {
log_err("Failed to get the FWU mdata.\n");
return ret;
}
for (i = 0; i < CONFIG_FWU_NUM_IMAGES_PER_BANK; i++) {
ret = gen_image_alt_info(buf, len, i * CONFIG_FWU_NUM_BANKS,
&mdata.img_entry[i], mtd);
if (ret)
break;
l = strlen(buf);
/* Replace the last ';' with '&' if there is another image. */
if (i != CONFIG_FWU_NUM_IMAGES_PER_BANK - 1 && l) {
buf[l] = '&';
buf++;
}
len -= l;
buf += l;
}
return ret;
}
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