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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2021
* Köry Maincent, Bootlin, <kory.maincent@bootlin.com>
*/
#include <common.h>
#include <bootdev.h>
#include <command.h>
#include <dm.h>
#include <malloc.h>
#include <extension_board.h>
#include <mapmem.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
static LIST_HEAD(extension_list);
static int extension_apply(struct extension *extension)
{
char *overlay_cmd;
ulong extrasize, overlay_addr;
struct fdt_header *blob;
if (!working_fdt) {
printf("No FDT memory address configured. Please configure\n"
"the FDT address via \"fdt addr <address>\" command.\n");
return CMD_RET_FAILURE;
}
overlay_cmd = env_get("extension_overlay_cmd");
if (!overlay_cmd) {
printf("Environment extension_overlay_cmd is missing\n");
return CMD_RET_FAILURE;
}
overlay_addr = env_get_hex("extension_overlay_addr", 0);
if (!overlay_addr) {
printf("Environment extension_overlay_addr is missing\n");
return CMD_RET_FAILURE;
}
env_set("extension_overlay_name", extension->overlay);
if (run_command(overlay_cmd, 0) != 0)
return CMD_RET_FAILURE;
extrasize = env_get_hex("filesize", 0);
if (!extrasize)
return CMD_RET_FAILURE;
fdt_shrink_to_minimum(working_fdt, extrasize);
blob = map_sysmem(overlay_addr, 0);
if (!fdt_valid(&blob))
return CMD_RET_FAILURE;
/* apply method prints messages on error */
if (fdt_overlay_apply_verbose(working_fdt, blob))
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
static int do_extension_list(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int i = 0;
struct extension *extension;
if (list_empty(&extension_list)) {
printf("No extension registered - Please run \"extension scan\"\n");
return CMD_RET_SUCCESS;
}
list_for_each_entry(extension, &extension_list, list) {
printf("Extension %d: %s\n", i++, extension->name);
printf("\tManufacturer: \t\t%s\n", extension->owner);
printf("\tVersion: \t\t%s\n", extension->version);
printf("\tDevicetree overlay: \t%s\n", extension->overlay);
printf("\tOther information: \t%s\n", extension->other);
}
return CMD_RET_SUCCESS;
}
static int extension_scan(bool show)
{
struct extension *extension, *next;
int extension_num;
list_for_each_entry_safe(extension, next, &extension_list, list) {
list_del(&extension->list);
free(extension);
}
extension_num = extension_board_scan(&extension_list);
if (show && extension_num >= 0)
printf("Found %d extension board(s).\n", extension_num);
/* either the number of extensions, or -ve for error */
return extension_num;
}
static int do_extension_scan(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int extension_num;
extension_num = extension_scan(true);
if (extension_num < 0)
return CMD_RET_FAILURE;
return CMD_RET_SUCCESS;
}
static int do_extension_apply(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
struct extension *extension = NULL;
struct list_head *entry;
int i = 0, extension_id, ret;
if (argc < 2)
return CMD_RET_USAGE;
if (strcmp(argv[1], "all") == 0) {
ret = CMD_RET_FAILURE;
list_for_each_entry(extension, &extension_list, list) {
ret = extension_apply(extension);
if (ret != CMD_RET_SUCCESS)
break;
}
} else {
extension_id = simple_strtol(argv[1], NULL, 10);
list_for_each(entry, &extension_list) {
if (i == extension_id) {
extension = list_entry(entry, struct extension, list);
break;
}
i++;
}
if (!extension) {
printf("Wrong extension number\n");
return CMD_RET_FAILURE;
}
ret = extension_apply(extension);
}
return ret;
}
static struct cmd_tbl cmd_extension[] = {
U_BOOT_CMD_MKENT(scan, 1, 1, do_extension_scan, "", ""),
U_BOOT_CMD_MKENT(list, 1, 0, do_extension_list, "", ""),
U_BOOT_CMD_MKENT(apply, 2, 0, do_extension_apply, "", ""),
};
static int do_extensionops(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct cmd_tbl *cp;
/* Drop the extension command */
argc--;
argv++;
cp = find_cmd_tbl(argv[0], cmd_extension, ARRAY_SIZE(cmd_extension));
if (cp)
return cp->cmd(cmdtp, flag, argc, argv);
return CMD_RET_USAGE;
}
U_BOOT_CMD(extension, 3, 1, do_extensionops,
"Extension board management sub system",
"scan - scan plugged extension(s) board(s)\n"
"extension list - lists available extension(s) board(s)\n"
"extension apply <extension number|all> - applies DT overlays corresponding to extension boards\n"
);
static int extension_bootdev_hunt(struct bootdev_hunter *info, bool show)
{
int ret;
ret = env_set_hex("extension_overlay_addr",
env_get_hex("fdtoverlay_addr_r", 0));
if (ret)
return log_msg_ret("env", ret);
ret = extension_scan(show);
if (ret < 0)
return log_msg_ret("ext", ret);
return 0;
}
/* extensions should have a uclass - for now we use UCLASS_SIMPLE_BUS uclass */
BOOTDEV_HUNTER(extension_bootdev_hunter) = {
.prio = BOOTDEVP_1_PRE_SCAN,
.uclass = UCLASS_SIMPLE_BUS,
.hunt = extension_bootdev_hunt,
};
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