mirror of
https://github.com/AsahiLinux/u-boot
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0998a20cfc
The fs_loader device is used to pull in settings via the chosen node. However, there was no library function for this, so arria10 was doing it explicitly. This function subsumes that, and uses ofnode_get_chosen_node instead of navigating the device tree directly. Because fs_loader pulls its config from the environment by default, it's fine to create a device with nothing backing it at all. Doing this allows enabling CONFIG_FS_LOADER without needing to modify the device tree. Signed-off-by: Sean Anderson <sean.anderson@seco.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
330 lines
7.1 KiB
C
330 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018-2019 Intel Corporation <www.intel.com>
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*
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*/
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#define LOG_CATEGORY UCLASS_FS_FIRMWARE_LOADER
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#include <common.h>
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#include <dm.h>
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#include <env.h>
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#include <errno.h>
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#include <blk.h>
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#include <fs.h>
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#include <fs_loader.h>
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#include <log.h>
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#include <asm/global_data.h>
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#include <dm/device-internal.h>
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#include <dm/root.h>
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#include <linux/string.h>
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#include <mapmem.h>
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#include <malloc.h>
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#include <spl.h>
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#ifdef CONFIG_CMD_UBIFS
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#include <ubi_uboot.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* struct firmware - A place for storing firmware and its attribute data.
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*
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* This holds information about a firmware and its content.
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*
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* @size: Size of a file
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* @data: Buffer for file
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* @priv: Firmware loader private fields
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* @name: Filename
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* @offset: Offset of reading a file
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*/
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struct firmware {
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size_t size;
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const u8 *data;
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const char *name;
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u32 offset;
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};
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#ifdef CONFIG_CMD_UBIFS
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static int mount_ubifs(char *mtdpart, char *ubivol)
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{
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int ret = ubi_part(mtdpart, NULL);
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if (ret) {
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debug("Cannot find mtd partition %s\n", mtdpart);
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return ret;
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}
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return cmd_ubifs_mount(ubivol);
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}
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static int umount_ubifs(void)
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{
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return cmd_ubifs_umount();
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}
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#else
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static int mount_ubifs(char *mtdpart, char *ubivol)
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{
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debug("Error: Cannot load image: no UBIFS support\n");
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return -ENOSYS;
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}
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#endif
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static int select_fs_dev(struct device_plat *plat)
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{
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int ret;
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if (plat->phandlepart.phandle) {
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ofnode node;
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node = ofnode_get_by_phandle(plat->phandlepart.phandle);
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struct udevice *dev;
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ret = device_get_global_by_ofnode(node, &dev);
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if (!ret) {
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struct blk_desc *desc = blk_get_by_device(dev);
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if (desc) {
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ret = fs_set_blk_dev_with_part(desc,
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plat->phandlepart.partition);
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} else {
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debug("%s: No device found\n", __func__);
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return -ENODEV;
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}
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}
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} else if (plat->mtdpart && plat->ubivol) {
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ret = mount_ubifs(plat->mtdpart, plat->ubivol);
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if (ret)
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return ret;
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ret = fs_set_blk_dev("ubi", NULL, FS_TYPE_UBIFS);
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} else {
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debug("Error: unsupported storage device.\n");
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return -ENODEV;
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}
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if (ret)
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debug("Error: could not access storage.\n");
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return ret;
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}
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/**
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* _request_firmware_prepare - Prepare firmware struct.
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*
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* @dev: An instance of a driver.
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* @name: Name of firmware file.
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* @dbuf: Address of buffer to load firmware into.
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* @size: Size of buffer.
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* @offset: Offset of a file for start reading into buffer.
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*
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* Return: Negative value if fail, 0 for successful.
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*/
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static int _request_firmware_prepare(struct udevice *dev,
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const char *name, void *dbuf,
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size_t size, u32 offset)
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{
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if (!name || name[0] == '\0')
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return -EINVAL;
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struct firmware *firmwarep = dev_get_priv(dev);
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if (!firmwarep)
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return -ENOMEM;
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firmwarep->name = name;
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firmwarep->offset = offset;
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firmwarep->data = dbuf;
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firmwarep->size = size;
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return 0;
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}
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/**
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* fw_get_filesystem_firmware - load firmware into an allocated buffer.
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* @dev: An instance of a driver.
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*
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* Return: Size of total read, negative value when error.
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*/
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static int fw_get_filesystem_firmware(struct udevice *dev)
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{
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loff_t actread;
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char *storage_interface, *dev_part, *ubi_mtdpart, *ubi_volume;
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int ret;
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storage_interface = env_get("storage_interface");
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dev_part = env_get("fw_dev_part");
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ubi_mtdpart = env_get("fw_ubi_mtdpart");
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ubi_volume = env_get("fw_ubi_volume");
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if (storage_interface && dev_part) {
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ret = fs_set_blk_dev(storage_interface, dev_part, FS_TYPE_ANY);
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} else if (storage_interface && ubi_mtdpart && ubi_volume) {
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ret = mount_ubifs(ubi_mtdpart, ubi_volume);
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if (ret)
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return ret;
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if (!strcmp("ubi", storage_interface))
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ret = fs_set_blk_dev(storage_interface, NULL,
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FS_TYPE_UBIFS);
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else
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ret = -ENODEV;
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} else {
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ret = select_fs_dev(dev_get_plat(dev));
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}
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if (ret)
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goto out;
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struct firmware *firmwarep = dev_get_priv(dev);
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if (!firmwarep)
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return -ENOMEM;
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ret = fs_read(firmwarep->name, (ulong)map_to_sysmem(firmwarep->data),
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firmwarep->offset, firmwarep->size, &actread);
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if (ret) {
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debug("Error: %d Failed to read %s from flash %lld != %zu.\n",
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ret, firmwarep->name, actread, firmwarep->size);
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} else {
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ret = actread;
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}
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out:
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#ifdef CONFIG_CMD_UBIFS
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umount_ubifs();
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#endif
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return ret;
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}
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/**
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* request_firmware_into_buf - Load firmware into a previously allocated buffer.
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* @dev: An instance of a driver.
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* @name: Name of firmware file.
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* @buf: Address of buffer to load firmware into.
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* @size: Size of buffer.
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* @offset: Offset of a file for start reading into buffer.
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*
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* The firmware is loaded directly into the buffer pointed to by @buf.
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*
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* Return: Size of total read, negative value when error.
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*/
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int request_firmware_into_buf(struct udevice *dev,
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const char *name,
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void *buf, size_t size, u32 offset)
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{
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int ret;
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if (!dev)
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return -EINVAL;
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ret = _request_firmware_prepare(dev, name, buf, size, offset);
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if (ret < 0) /* error */
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return ret;
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ret = fw_get_filesystem_firmware(dev);
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return ret;
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}
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static int fs_loader_of_to_plat(struct udevice *dev)
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{
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u32 phandlepart[2];
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ofnode fs_loader_node = dev_ofnode(dev);
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if (ofnode_valid(fs_loader_node)) {
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struct device_plat *plat;
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plat = dev_get_plat(dev);
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if (!ofnode_read_u32_array(fs_loader_node,
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"phandlepart",
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phandlepart, 2)) {
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plat->phandlepart.phandle = phandlepart[0];
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plat->phandlepart.partition = phandlepart[1];
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}
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plat->mtdpart = (char *)ofnode_read_string(
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fs_loader_node, "mtdpart");
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plat->ubivol = (char *)ofnode_read_string(
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fs_loader_node, "ubivol");
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}
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return 0;
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}
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static int fs_loader_probe(struct udevice *dev)
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{
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#if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(BLK)
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int ret;
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struct device_plat *plat = dev_get_plat(dev);
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if (plat->phandlepart.phandle) {
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ofnode node = ofnode_get_by_phandle(plat->phandlepart.phandle);
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struct udevice *parent_dev = NULL;
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ret = device_get_global_by_ofnode(node, &parent_dev);
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if (!ret) {
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struct udevice *dev;
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ret = blk_get_from_parent(parent_dev, &dev);
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if (ret) {
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debug("fs_loader: No block device: %d\n",
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ret);
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return ret;
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}
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}
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}
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#endif
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return 0;
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};
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static const struct udevice_id fs_loader_ids[] = {
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{ .compatible = "u-boot,fs-loader"},
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{ }
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};
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U_BOOT_DRIVER(fs_loader) = {
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.name = "fs-loader",
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.id = UCLASS_FS_FIRMWARE_LOADER,
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.of_match = fs_loader_ids,
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.probe = fs_loader_probe,
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.of_to_plat = fs_loader_of_to_plat,
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.plat_auto = sizeof(struct device_plat),
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.priv_auto = sizeof(struct firmware),
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};
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static struct device_plat default_plat = { 0 };
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int get_fs_loader(struct udevice **dev)
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{
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int ret;
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ofnode node = ofnode_get_chosen_node("firmware-loader");
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if (ofnode_valid(node))
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return uclass_get_device_by_ofnode(UCLASS_FS_FIRMWARE_LOADER,
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node, dev);
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/* Try the first device if none was chosen */
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ret = uclass_first_device_err(UCLASS_FS_FIRMWARE_LOADER, dev);
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if (ret != -ENODEV)
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return ret;
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/* Just create a new device */
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ret = device_bind(dm_root(), DM_DRIVER_GET(fs_loader), "default-loader",
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&default_plat, ofnode_null(), dev);
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if (ret)
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return ret;
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return device_probe(*dev);
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}
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UCLASS_DRIVER(fs_loader) = {
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.id = UCLASS_FS_FIRMWARE_LOADER,
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.name = "fs-loader",
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};
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