diff options
Diffstat (limited to 'cmd/extension_board.c')
| -rw-r--r-- | cmd/extension_board.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/cmd/extension_board.c b/cmd/extension_board.c new file mode 100644 index 0000000000..bbb4812ff8 --- /dev/null +++ b/cmd/extension_board.c @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2021 + * Köry Maincent, Bootlin, <kory.maincent@bootlin.com> + */ + +#include <common.h> +#include <command.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 do_extension_scan(struct cmd_tbl *cmdtp, int flag, + int argc, char *const argv[]) +{ + 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 (extension_num < 0) + return CMD_RET_FAILURE; + + printf("Found %d extension board(s).\n", extension_num); + + 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) { + 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" +); |