u-boot/drivers/misc/fs_loader.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Intel Corporation <www.intel.com>
*
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <blk.h>
#include <fs.h>
#include <fs_loader.h>
#include <linux/string.h>
#include <mapmem.h>
#include <malloc.h>
#include <spl.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* struct firmware - A place for storing firmware and its attribute data.
*
* This holds information about a firmware and its content.
*
* @size: Size of a file
* @data: Buffer for file
* @priv: Firmware loader private fields
* @name: Filename
* @offset: Offset of reading a file
*/
struct firmware {
size_t size;
const u8 *data;
const char *name;
u32 offset;
};
#ifdef CONFIG_CMD_UBIFS
static int mount_ubifs(char *mtdpart, char *ubivol)
{
int ret = ubi_part(mtdpart, NULL);
if (ret) {
debug("Cannot find mtd partition %s\n", mtdpart);
return ret;
}
return cmd_ubifs_mount(ubivol);
}
static int umount_ubifs(void)
{
return cmd_ubifs_umount();
}
#else
static int mount_ubifs(char *mtdpart, char *ubivol)
{
debug("Error: Cannot load image: no UBIFS support\n");
return -ENOSYS;
}
#endif
static int select_fs_dev(struct device_platdata *plat)
{
int ret;
if (plat->phandlepart.phandle) {
ofnode node;
node = ofnode_get_by_phandle(plat->phandlepart.phandle);
struct udevice *dev;
ret = device_get_global_by_ofnode(node, &dev);
if (!ret) {
struct blk_desc *desc = blk_get_by_device(dev);
if (desc) {
ret = fs_set_blk_dev_with_part(desc,
plat->phandlepart.partition);
} else {
debug("%s: No device found\n", __func__);
return -ENODEV;
}
}
} else if (plat->mtdpart && plat->ubivol) {
ret = mount_ubifs(plat->mtdpart, plat->ubivol);
if (ret)
return ret;
ret = fs_set_blk_dev("ubi", NULL, FS_TYPE_UBIFS);
} else {
debug("Error: unsupported storage device.\n");
return -ENODEV;
}
if (ret)
debug("Error: could not access storage.\n");
return ret;
}
/**
* _request_firmware_prepare - Prepare firmware struct.
*
* @dev: An instance of a driver.
* @name: Name of firmware file.
* @dbuf: Address of buffer to load firmware into.
* @size: Size of buffer.
* @offset: Offset of a file for start reading into buffer.
*
* Return: Negative value if fail, 0 for successful.
*/
static int _request_firmware_prepare(struct udevice *dev,
const char *name, void *dbuf,
size_t size, u32 offset)
{
if (!name || name[0] == '\0')
return -EINVAL;
struct firmware *firmwarep = dev_get_priv(dev);
if (!firmwarep)
return -ENOMEM;
firmwarep->name = name;
firmwarep->offset = offset;
firmwarep->data = dbuf;
firmwarep->size = size;
return 0;
}
/**
* fw_get_filesystem_firmware - load firmware into an allocated buffer.
* @dev: An instance of a driver.
*
* Return: Size of total read, negative value when error.
*/
static int fw_get_filesystem_firmware(struct udevice *dev)
{
loff_t actread;
char *storage_interface, *dev_part, *ubi_mtdpart, *ubi_volume;
int ret;
storage_interface = env_get("storage_interface");
dev_part = env_get("fw_dev_part");
ubi_mtdpart = env_get("fw_ubi_mtdpart");
ubi_volume = env_get("fw_ubi_volume");
if (storage_interface && dev_part) {
ret = fs_set_blk_dev(storage_interface, dev_part, FS_TYPE_ANY);
} else if (storage_interface && ubi_mtdpart && ubi_volume) {
ret = mount_ubifs(ubi_mtdpart, ubi_volume);
if (ret)
return ret;
if (!strcmp("ubi", storage_interface))
ret = fs_set_blk_dev(storage_interface, NULL,
FS_TYPE_UBIFS);
else
ret = -ENODEV;
} else {
ret = select_fs_dev(dev->platdata);
}
if (ret)
goto out;
struct firmware *firmwarep = dev_get_priv(dev);
if (!firmwarep)
return -ENOMEM;
ret = fs_read(firmwarep->name, (ulong)map_to_sysmem(firmwarep->data),
firmwarep->offset, firmwarep->size, &actread);
if (ret) {
debug("Error: %d Failed to read %s from flash %lld != %zu.\n",
ret, firmwarep->name, actread, firmwarep->size);
} else {
ret = actread;
}
out:
#ifdef CONFIG_CMD_UBIFS
umount_ubifs();
#endif
return ret;
}
/**
* request_firmware_into_buf - Load firmware into a previously allocated buffer.
* @dev: An instance of a driver.
* @name: Name of firmware file.
* @buf: Address of buffer to load firmware into.
* @size: Size of buffer.
* @offset: Offset of a file for start reading into buffer.
*
* The firmware is loaded directly into the buffer pointed to by @buf.
*
* Return: Size of total read, negative value when error.
*/
int request_firmware_into_buf(struct udevice *dev,
const char *name,
void *buf, size_t size, u32 offset)
{
int ret;
if (!dev)
return -EINVAL;
ret = _request_firmware_prepare(dev, name, buf, size, offset);
if (ret < 0) /* error */
return ret;
ret = fw_get_filesystem_firmware(dev);
return ret;
}
static int fs_loader_ofdata_to_platdata(struct udevice *dev)
{
const char *fs_loader_path;
u32 phandlepart[2];
fs_loader_path = ofnode_get_chosen_prop("firmware-loader");
if (fs_loader_path) {
ofnode fs_loader_node;
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,
"phandlepart",
phandlepart, 2)) {
plat->phandlepart.phandle = phandlepart[0];
plat->phandlepart.partition = phandlepart[1];
}
plat->mtdpart = (char *)ofnode_read_string(
fs_loader_node, "mtdpart");
plat->ubivol = (char *)ofnode_read_string(
fs_loader_node, "ubivol");
}
}
return 0;
}
static int fs_loader_probe(struct udevice *dev)
{
return 0;
};
static const struct udevice_id fs_loader_ids[] = {
{ .compatible = "u-boot,fs-loader"},
{ }
};
U_BOOT_DRIVER(fs_loader) = {
.name = "fs-loader",
.id = UCLASS_FS_FIRMWARE_LOADER,
.of_match = fs_loader_ids,
.probe = fs_loader_probe,
.ofdata_to_platdata = fs_loader_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct device_platdata),
.priv_auto_alloc_size = sizeof(struct firmware),
};
UCLASS_DRIVER(fs_loader) = {
.id = UCLASS_FS_FIRMWARE_LOADER,
.name = "fs-loader",
};