xref: /openbmc/u-boot/cmd/legacy_led.c (revision 699e831e)
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_LED_STATUS_BOARD_SPECIFIC
30 #ifdef CONFIG_LED_STATUS0
31 	{ "0", CONFIG_LED_STATUS_BIT, NULL, NULL, NULL },
32 #endif
33 #ifdef CONFIG_LED_STATUS1
34 	{ "1", CONFIG_LED_STATUS_BIT1, NULL, NULL, NULL },
35 #endif
36 #ifdef CONFIG_LED_STATUS2
37 	{ "2", CONFIG_LED_STATUS_BIT2, NULL, NULL, NULL },
38 #endif
39 #ifdef CONFIG_LED_STATUS3
40 	{ "3", CONFIG_LED_STATUS_BIT3, NULL, NULL, NULL },
41 #endif
42 #ifdef CONFIG_LED_STATUS4
43 	{ "4", CONFIG_LED_STATUS_BIT4, NULL, NULL, NULL },
44 #endif
45 #ifdef CONFIG_LED_STATUS5
46 	{ "5", CONFIG_LED_STATUS_BIT5, NULL, NULL, NULL },
47 #endif
48 #endif
49 #ifdef CONFIG_LED_STATUS_GREEN
50 	{ "green", CONFIG_LED_STATUS_GREEN, green_led_off, green_led_on, NULL },
51 #endif
52 #ifdef CONFIG_LED_STATUS_YELLOW
53 	{ "yellow", CONFIG_LED_STATUS_YELLOW, yellow_led_off, yellow_led_on,
54 	  NULL },
55 #endif
56 #ifdef CONFIG_LED_STATUS_RED
57 	{ "red", CONFIG_LED_STATUS_RED, red_led_off, red_led_on, NULL },
58 #endif
59 #ifdef CONFIG_LED_STATUS_BLUE
60 	{ "blue", CONFIG_LED_STATUS_BLUE, blue_led_off, blue_led_on, NULL },
61 #endif
62 	{ NULL, 0, NULL, NULL, NULL }
63 };
64 
65 enum led_cmd { LED_ON, LED_OFF, LED_TOGGLE, LED_BLINK };
66 
67 enum led_cmd get_led_cmd(char *var)
68 {
69 	if (strcmp(var, "off") == 0)
70 		return LED_OFF;
71 	if (strcmp(var, "on") == 0)
72 		return LED_ON;
73 	if (strcmp(var, "toggle") == 0)
74 		return LED_TOGGLE;
75 	if (strcmp(var, "blink") == 0)
76 		return LED_BLINK;
77 
78 	return -1;
79 }
80 
81 /*
82  * LED drivers providing a blinking LED functionality, like the
83  * PCA9551, can override this empty weak function
84  */
85 void __weak __led_blink(led_id_t mask, int freq)
86 {
87 }
88 
89 int do_legacy_led(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
90 {
91 	int i, match = 0;
92 	enum led_cmd cmd;
93 	int freq;
94 
95 	/* Validate arguments */
96 	if ((argc < 3) || (argc > 4))
97 		return CMD_RET_USAGE;
98 
99 	cmd = get_led_cmd(argv[2]);
100 	if (cmd < 0) {
101 		return CMD_RET_USAGE;
102 	}
103 
104 	for (i = 0; led_commands[i].string; i++) {
105 		if ((strcmp("all", argv[1]) == 0) ||
106 		    (strcmp(led_commands[i].string, argv[1]) == 0)) {
107 			match = 1;
108 			switch (cmd) {
109 			case LED_ON:
110 				if (led_commands[i].on)
111 					led_commands[i].on();
112 				else
113 					__led_set(led_commands[i].mask,
114 							  CONFIG_LED_STATUS_ON);
115 				break;
116 			case LED_OFF:
117 				if (led_commands[i].off)
118 					led_commands[i].off();
119 				else
120 					__led_set(led_commands[i].mask,
121 						  CONFIG_LED_STATUS_OFF);
122 				break;
123 			case LED_TOGGLE:
124 				if (led_commands[i].toggle)
125 					led_commands[i].toggle();
126 				else
127 					__led_toggle(led_commands[i].mask);
128 				break;
129 			case LED_BLINK:
130 				if (argc != 4)
131 					return CMD_RET_USAGE;
132 
133 				freq = simple_strtoul(argv[3], NULL, 10);
134 				__led_blink(led_commands[i].mask, freq);
135 			}
136 			/* Need to set only 1 led if led_name wasn't 'all' */
137 			if (strcmp("all", argv[1]) != 0)
138 				break;
139 		}
140 	}
141 
142 	/* If we ran out of matches, print Usage */
143 	if (!match) {
144 		return CMD_RET_USAGE;
145 	}
146 
147 	return 0;
148 }
149 
150 U_BOOT_CMD(
151 	led, 4, 1, do_legacy_led,
152 	"["
153 #ifdef CONFIG_LED_STATUS_BOARD_SPECIFIC
154 #ifdef CONFIG_LED_STATUS0
155 	"0|"
156 #endif
157 #ifdef CONFIG_LED_STATUS1
158 	"1|"
159 #endif
160 #ifdef CONFIG_LED_STATUS2
161 	"2|"
162 #endif
163 #ifdef CONFIG_LED_STATUS3
164 	"3|"
165 #endif
166 #ifdef CONFIG_LED_STATUS4
167 	"4|"
168 #endif
169 #ifdef CONFIG_LED_STATUS5
170 	"5|"
171 #endif
172 #endif
173 #ifdef CONFIG_LED_STATUS_GREEN
174 	"green|"
175 #endif
176 #ifdef CONFIG_LED_STATUS_YELLOW
177 	"yellow|"
178 #endif
179 #ifdef CONFIG_LED_STATUS_RED
180 	"red|"
181 #endif
182 #ifdef CONFIG_LED_STATUS_BLUE
183 	"blue|"
184 #endif
185 	"all] [on|off|toggle|blink] [blink-freq in ms]",
186 	"[led_name] [on|off|toggle|blink] sets or clears led(s)"
187 );
188