diff options
Diffstat (limited to 'cmd/misc.c')
| -rw-r--r-- | cmd/misc.c | 168 |
1 files changed, 107 insertions, 61 deletions
diff --git a/cmd/misc.c b/cmd/misc.c index 20ab943494..653deed7f5 100644 --- a/cmd/misc.c +++ b/cmd/misc.c @@ -1,88 +1,134 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * (C) Copyright 2001 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * 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. */ -/* - * Misc functions - */ #include <common.h> #include <command.h> -#include <console.h> -#include <linux/delay.h> - -static int do_sleep(struct cmd_tbl *cmdtp, int flag, int argc, - char *const argv[]) +#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[]) { - ulong start = get_timer(0); - ulong mdelay = 0; - ulong delay; - char *frpart; - - if (argc != 2) - return CMD_RET_USAGE; + 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); + } - delay = simple_strtoul(argv[1], NULL, 10) * CONFIG_SYS_HZ; + return 0; +} - frpart = strchr(argv[1], '.'); +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; + } - if (frpart) { - uint mult = CONFIG_SYS_HZ / 10; - for (frpart++; *frpart != '\0' && mult > 0; frpart++) { - if (*frpart < '0' || *frpart > '9') { - mdelay = 0; - break; - } - mdelay += (*frpart - '0') * mult; - mult /= 10; + 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); } - delay += mdelay; - - while (get_timer(start) < delay) { - if (ctrlc()) - return (-1); + return ret; +} - udelay(100); - } +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); +} - return 0; +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); } -U_BOOT_CMD( - sleep , 2, 1, do_sleep, - "delay execution for some time", - "N\n" - " - delay execution for N seconds (N is _decimal_ and can be\n" - " fractional)" -); +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, "", ""), +}; -#ifdef CONFIG_CMD_TIMER -static int do_timer(struct cmd_tbl *cmdtp, int flag, int argc, - char *const argv[]) +static int do_misc(struct cmd_tbl *cmdtp, int flag, + int argc, char *const argv[]) { - static ulong start; + struct cmd_tbl *misc_cmd; + int ret; - if (argc != 2) + 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; - if (!strcmp(argv[1], "start")) - start = get_timer(0); + ret = misc_cmd->cmd(misc_cmd, flag, argc, argv); - if (!strcmp(argv[1], "get")) { - ulong msecs = get_timer(start) * 1000 / CONFIG_SYS_HZ; - printf("%ld.%03d\n", msecs / 1000, (int)(msecs % 1000)); - } - - return 0; + return cmd_process_error(misc_cmd, ret); } U_BOOT_CMD( - timer, 2, 1, do_timer, - "access the system timer", - "start - Reset the timer reference.\n" - "timer get - Print the time since 'start'." + 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'" ); -#endif |