u-boot/common/cmd_demo.c
Simon Glass a02af4aeec dm: demo: Add a simple GPIO demonstration
Add a new 'demo light' command which uses GPIOs to control imaginary lights.
Each light is assigned a bit number in the overall value. This provides an
example driver for using the new GPIO API.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-01-29 17:09:51 -07:00

129 lines
2.8 KiB
C

/*
* Copyright (c) 2013 Google, Inc
*
* (C) Copyright 2012
* Pavel Herrmann <morpheus.ibis@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm-demo.h>
#include <asm/io.h>
struct udevice *demo_dev;
static int do_demo_hello(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int ch = 0;
if (argc)
ch = *argv[0];
return demo_hello(demo_dev, ch);
}
static int do_demo_status(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int status;
int ret;
ret = demo_status(demo_dev, &status);
if (ret)
return ret;
printf("Status: %d\n", status);
return 0;
}
static int do_demo_light(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int light;
int ret;
if (argc) {
light = simple_strtoul(argv[0], NULL, 16);
ret = demo_set_light(demo_dev, light);
} else {
ret = demo_get_light(demo_dev);
if (ret >= 0) {
printf("Light: %x\n", ret);
ret = 0;
}
}
return ret;
}
int do_demo_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
struct udevice *dev;
int i, ret;
puts("Demo uclass entries:\n");
for (i = 0, ret = uclass_first_device(UCLASS_DEMO, &dev);
dev;
ret = uclass_next_device(&dev)) {
printf("entry %d - instance %08x, ops %08x, platdata %08x\n",
i++, map_to_sysmem(dev),
map_to_sysmem(dev->driver->ops),
map_to_sysmem(dev_get_platdata(dev)));
}
return cmd_process_error(cmdtp, ret);
}
static cmd_tbl_t demo_commands[] = {
U_BOOT_CMD_MKENT(list, 0, 1, do_demo_list, "", ""),
U_BOOT_CMD_MKENT(hello, 2, 1, do_demo_hello, "", ""),
U_BOOT_CMD_MKENT(light, 2, 1, do_demo_light, "", ""),
U_BOOT_CMD_MKENT(status, 1, 1, do_demo_status, "", ""),
};
static int do_demo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
cmd_tbl_t *demo_cmd;
int devnum = 0;
int ret;
if (argc < 2)
return CMD_RET_USAGE;
demo_cmd = find_cmd_tbl(argv[1], demo_commands,
ARRAY_SIZE(demo_commands));
argc -= 2;
argv += 2;
if (!demo_cmd || argc > demo_cmd->maxargs)
return CMD_RET_USAGE;
if (argc) {
devnum = simple_strtoul(argv[0], NULL, 10);
ret = uclass_get_device(UCLASS_DEMO, devnum, &demo_dev);
if (ret)
return cmd_process_error(cmdtp, ret);
argc--;
argv++;
} else {
demo_dev = NULL;
if (demo_cmd->cmd != do_demo_list)
return CMD_RET_USAGE;
}
ret = demo_cmd->cmd(demo_cmd, flag, argc, argv);
return cmd_process_error(demo_cmd, ret);
}
U_BOOT_CMD(
demo, 4, 1, do_demo,
"Driver model (dm) demo operations",
"list List available demo devices\n"
"demo hello <num> [<char>] Say hello\n"
"demo light [<num>] Set or get the lights\n"
"demo status <num> Get demo device status\n"
"demo list List available demo devices"
);