mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 06:00:43 +00:00
3bc0db11ba
Enable the command "misc" for accessing miscellaneous devices with a MISC uclass driver. The command provides listing all MISC devices as well as read and write functionalities via their drivers. Signed-off-by: Bin Meng <bin.meng@windriver.com>
134 lines
3 KiB
C
134 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 2020 Wind River Systems, Inc.
|
|
*
|
|
* Author:
|
|
* Bin Meng <bin.meng@windriver.com>
|
|
*
|
|
* A command interface to access misc devices with MISC uclass driver APIs.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <misc.h>
|
|
|
|
enum misc_op {
|
|
MISC_OP_READ,
|
|
MISC_OP_WRITE
|
|
};
|
|
|
|
static char *misc_op_str[] = {
|
|
"read",
|
|
"write"
|
|
};
|
|
|
|
static int do_misc_list(struct cmd_tbl *cmdtp, int flag,
|
|
int argc, char *const argv[])
|
|
{
|
|
struct udevice *dev;
|
|
|
|
printf("Device Index Driver\n");
|
|
printf("-------------------------------------\n");
|
|
for (uclass_first_device(UCLASS_MISC, &dev);
|
|
dev;
|
|
uclass_next_device(&dev)) {
|
|
printf("%-20s %5d %10s\n", dev->name, dev->seq,
|
|
dev->driver->name);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_misc_op(struct cmd_tbl *cmdtp, int flag,
|
|
int argc, char *const argv[], enum misc_op op)
|
|
{
|
|
int (*misc_op)(struct udevice *, int, void *, int);
|
|
struct udevice *dev;
|
|
int offset;
|
|
void *buf;
|
|
int size;
|
|
int ret;
|
|
|
|
ret = uclass_get_device_by_name(UCLASS_MISC, argv[0], &dev);
|
|
if (ret) {
|
|
printf("Unable to find device %s\n", argv[0]);
|
|
return ret;
|
|
}
|
|
|
|
offset = simple_strtoul(argv[1], NULL, 16);
|
|
buf = (void *)simple_strtoul(argv[2], NULL, 16);
|
|
size = simple_strtoul(argv[3], NULL, 16);
|
|
|
|
if (op == MISC_OP_READ)
|
|
misc_op = misc_read;
|
|
else
|
|
misc_op = misc_write;
|
|
|
|
ret = misc_op(dev, offset, buf, size);
|
|
if (ret < 0) {
|
|
if (ret == -ENOSYS) {
|
|
printf("The device does not support %s\n",
|
|
misc_op_str[op]);
|
|
ret = 0;
|
|
}
|
|
} else {
|
|
if (ret == size)
|
|
ret = 0;
|
|
else
|
|
printf("Partially %s %d bytes\n", misc_op_str[op], ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int do_misc_read(struct cmd_tbl *cmdtp, int flag,
|
|
int argc, char *const argv[])
|
|
{
|
|
return do_misc_op(cmdtp, flag, argc, argv, MISC_OP_READ);
|
|
}
|
|
|
|
static int do_misc_write(struct cmd_tbl *cmdtp, int flag,
|
|
int argc, char *const argv[])
|
|
{
|
|
return do_misc_op(cmdtp, flag, argc, argv, MISC_OP_WRITE);
|
|
}
|
|
|
|
static struct cmd_tbl misc_commands[] = {
|
|
U_BOOT_CMD_MKENT(list, 0, 1, do_misc_list, "", ""),
|
|
U_BOOT_CMD_MKENT(read, 4, 1, do_misc_read, "", ""),
|
|
U_BOOT_CMD_MKENT(write, 4, 1, do_misc_write, "", ""),
|
|
};
|
|
|
|
static int do_misc(struct cmd_tbl *cmdtp, int flag,
|
|
int argc, char *const argv[])
|
|
{
|
|
struct cmd_tbl *misc_cmd;
|
|
int ret;
|
|
|
|
if (argc < 2)
|
|
return CMD_RET_USAGE;
|
|
misc_cmd = find_cmd_tbl(argv[1], misc_commands,
|
|
ARRAY_SIZE(misc_commands));
|
|
argc -= 2;
|
|
argv += 2;
|
|
if (!misc_cmd || argc != misc_cmd->maxargs)
|
|
return CMD_RET_USAGE;
|
|
|
|
ret = misc_cmd->cmd(misc_cmd, flag, argc, argv);
|
|
|
|
return cmd_process_error(misc_cmd, ret);
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
misc, 6, 1, do_misc,
|
|
"Access miscellaneous devices with MISC uclass driver APIs",
|
|
"list - list all miscellaneous devices\n"
|
|
"misc read name offset addr len - read `len' bytes starting at\n"
|
|
" `offset' of device `name'\n"
|
|
" to memory at `addr'\n"
|
|
"misc write name offset addr len - write `len' bytes starting at\n"
|
|
" `offset' of device `name'\n"
|
|
" from memory at `addr'"
|
|
);
|