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[u-boot] / cmd / legacy_led.c
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 );