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// 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),
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'"
);
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