xref: /openbmc/u-boot/cmd/led.c (revision 35546f6f)
1 /*
2  * (C) Copyright 2010
3  * Jason Kridner <jkridner@beagleboard.org>
4  *
5  * Based on cmd_led.c patch from:
6  * http://www.mail-archive.com/u-boot@lists.denx.de/msg06873.html
7  * (C) Copyright 2008
8  * Ulf Samuelsson <ulf.samuelsson@atmel.com>
9  *
10  * SPDX-License-Identifier:	GPL-2.0+
11  */
12 
13 #include <common.h>
14 #include <config.h>
15 #include <command.h>
16 #include <status_led.h>
17 
18 struct led_tbl_s {
19 	char		*string;	/* String for use in the command */
20 	led_id_t	mask;		/* Mask used for calling __led_set() */
21 	void		(*off)(void);	/* Optional function for turning LED off */
22 	void		(*on)(void);	/* Optional function for turning LED on */
23 	void		(*toggle)(void);/* Optional function for toggling LED */
24 };
25 
26 typedef struct led_tbl_s led_tbl_t;
27 
28 static const led_tbl_t led_commands[] = {
29 #ifdef CONFIG_BOARD_SPECIFIC_LED
30 #ifdef STATUS_LED_BIT
31 	{ "0", STATUS_LED_BIT, NULL, NULL, NULL },
32 #endif
33 #ifdef STATUS_LED_BIT1
34 	{ "1", STATUS_LED_BIT1, NULL, NULL, NULL },
35 #endif
36 #ifdef STATUS_LED_BIT2
37 	{ "2", STATUS_LED_BIT2, NULL, NULL, NULL },
38 #endif
39 #ifdef STATUS_LED_BIT3
40 	{ "3", STATUS_LED_BIT3, NULL, NULL, NULL },
41 #endif
42 #ifdef STATUS_LED_BIT4
43 	{ "4", STATUS_LED_BIT4, NULL, NULL, NULL },
44 #endif
45 #ifdef STATUS_LED_BIT5
46 	{ "5", STATUS_LED_BIT5, NULL, NULL, NULL },
47 #endif
48 #endif
49 #ifdef STATUS_LED_GREEN
50 	{ "green", STATUS_LED_GREEN, green_led_off, green_led_on, NULL },
51 #endif
52 #ifdef STATUS_LED_YELLOW
53 	{ "yellow", STATUS_LED_YELLOW, yellow_led_off, yellow_led_on, NULL },
54 #endif
55 #ifdef STATUS_LED_RED
56 	{ "red", STATUS_LED_RED, red_led_off, red_led_on, NULL },
57 #endif
58 #ifdef STATUS_LED_BLUE
59 	{ "blue", STATUS_LED_BLUE, blue_led_off, blue_led_on, NULL },
60 #endif
61 	{ NULL, 0, NULL, NULL, NULL }
62 };
63 
64 enum led_cmd { LED_ON, LED_OFF, LED_TOGGLE, LED_BLINK };
65 
66 enum led_cmd get_led_cmd(char *var)
67 {
68 	if (strcmp(var, "off") == 0)
69 		return LED_OFF;
70 	if (strcmp(var, "on") == 0)
71 		return LED_ON;
72 	if (strcmp(var, "toggle") == 0)
73 		return LED_TOGGLE;
74 	if (strcmp(var, "blink") == 0)
75 		return LED_BLINK;
76 
77 	return -1;
78 }
79 
80 /*
81  * LED drivers providing a blinking LED functionality, like the
82  * PCA9551, can override this empty weak function
83  */
84 void __weak __led_blink(led_id_t mask, int freq)
85 {
86 }
87 
88 int do_led (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
89 {
90 	int i, match = 0;
91 	enum led_cmd cmd;
92 	int freq;
93 
94 	/* Validate arguments */
95 	if ((argc < 3) || (argc > 4))
96 		return CMD_RET_USAGE;
97 
98 	cmd = get_led_cmd(argv[2]);
99 	if (cmd < 0) {
100 		return CMD_RET_USAGE;
101 	}
102 
103 	for (i = 0; led_commands[i].string; i++) {
104 		if ((strcmp("all", argv[1]) == 0) ||
105 		    (strcmp(led_commands[i].string, argv[1]) == 0)) {
106 			match = 1;
107 			switch (cmd) {
108 			case LED_ON:
109 				if (led_commands[i].on)
110 					led_commands[i].on();
111 				else
112 					__led_set(led_commands[i].mask,
113 							  STATUS_LED_ON);
114 				break;
115 			case LED_OFF:
116 				if (led_commands[i].off)
117 					led_commands[i].off();
118 				else
119 					__led_set(led_commands[i].mask,
120 							  STATUS_LED_OFF);
121 				break;
122 			case LED_TOGGLE:
123 				if (led_commands[i].toggle)
124 					led_commands[i].toggle();
125 				else
126 					__led_toggle(led_commands[i].mask);
127 				break;
128 			case LED_BLINK:
129 				if (argc != 4)
130 					return CMD_RET_USAGE;
131 
132 				freq = simple_strtoul(argv[3], NULL, 10);
133 				__led_blink(led_commands[i].mask, freq);
134 			}
135 			/* Need to set only 1 led if led_name wasn't 'all' */
136 			if (strcmp("all", argv[1]) != 0)
137 				break;
138 		}
139 	}
140 
141 	/* If we ran out of matches, print Usage */
142 	if (!match) {
143 		return CMD_RET_USAGE;
144 	}
145 
146 	return 0;
147 }
148 
149 U_BOOT_CMD(
150 	led, 4, 1, do_led,
151 	"["
152 #ifdef CONFIG_BOARD_SPECIFIC_LED
153 #ifdef STATUS_LED_BIT
154 	"0|"
155 #endif
156 #ifdef STATUS_LED_BIT1
157 	"1|"
158 #endif
159 #ifdef STATUS_LED_BIT2
160 	"2|"
161 #endif
162 #ifdef STATUS_LED_BIT3
163 	"3|"
164 #endif
165 #ifdef STATUS_LED_BIT4
166 	"4|"
167 #endif
168 #ifdef STATUS_LED_BIT5
169 	"5|"
170 #endif
171 #endif
172 #ifdef STATUS_LED_GREEN
173 	"green|"
174 #endif
175 #ifdef STATUS_LED_YELLOW
176 	"yellow|"
177 #endif
178 #ifdef STATUS_LED_RED
179 	"red|"
180 #endif
181 #ifdef STATUS_LED_BLUE
182 	"blue|"
183 #endif
184 	"all] [on|off|toggle|blink] [blink-freq in ms]",
185 	"[led_name] [on|off|toggle|blink] sets or clears led(s)"
186 );
187