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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  * See file CREDITS for list of people who contributed to this
11  * project.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License as
15  * published by the Free Software Foundation; either version 2 of
16  * the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26  * MA 02111-1307 USA
27  */
28
29 #include <common.h>
30 #include <config.h>
31 #include <command.h>
32 #include <status_led.h>
33
34 struct led_tbl_s {
35         char            *string;        /* String for use in the command */
36         led_id_t        mask;           /* Mask used for calling __led_set() */
37         void            (*off)(void);   /* Optional function for turning LED off */
38         void            (*on)(void);    /* Optional function for turning LED on */
39         void            (*toggle)(void);/* Optional function for toggling LED */
40 };
41
42 typedef struct led_tbl_s led_tbl_t;
43
44 static const led_tbl_t led_commands[] = {
45 #ifdef CONFIG_BOARD_SPECIFIC_LED
46 #ifdef STATUS_LED_BIT
47         { "0", STATUS_LED_BIT, NULL, NULL, NULL },
48 #endif
49 #ifdef STATUS_LED_BIT1
50         { "1", STATUS_LED_BIT1, NULL, NULL, NULL },
51 #endif
52 #ifdef STATUS_LED_BIT2
53         { "2", STATUS_LED_BIT2, NULL, NULL, NULL },
54 #endif
55 #ifdef STATUS_LED_BIT3
56         { "3", STATUS_LED_BIT3, NULL, NULL, NULL },
57 #endif
58 #endif
59 #ifdef STATUS_LED_GREEN
60         { "green", STATUS_LED_GREEN, green_led_off, green_led_on, NULL },
61 #endif
62 #ifdef STATUS_LED_YELLOW
63         { "yellow", STATUS_LED_YELLOW, yellow_led_off, yellow_led_on, NULL },
64 #endif
65 #ifdef STATUS_LED_RED
66         { "red", STATUS_LED_RED, red_led_off, red_led_on, NULL },
67 #endif
68 #ifdef STATUS_LED_BLUE
69         { "blue", STATUS_LED_BLUE, blue_led_off, blue_led_on, NULL },
70 #endif
71         { NULL, 0, NULL, NULL, NULL }
72 };
73
74 enum led_cmd { LED_ON, LED_OFF, LED_TOGGLE };
75
76 enum led_cmd get_led_cmd(char *var)
77 {
78         if (strcmp(var, "off") == 0) {
79                 return LED_OFF;
80         }
81         if (strcmp(var, "on") == 0) {
82                 return LED_ON;
83         }
84         if (strcmp(var, "toggle") == 0)
85                 return LED_TOGGLE;
86         return -1;
87 }
88
89 int do_led (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
90 {
91         int i, match = 0;
92         enum led_cmd cmd;
93
94         /* Validate arguments */
95         if ((argc != 3)) {
96                 return CMD_RET_USAGE;
97         }
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, 1);
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, 0);
120                                 break;
121                         case LED_TOGGLE:
122                                 if (led_commands[i].toggle)
123                                         led_commands[i].toggle();
124                                 else
125                                         __led_toggle(led_commands[i].mask);
126                         }
127                         /* Need to set only 1 led if led_name wasn't 'all' */
128                         if (strcmp("all", argv[1]) != 0)
129                                 break;
130                 }
131         }
132
133         /* If we ran out of matches, print Usage */
134         if (!match) {
135                 return CMD_RET_USAGE;
136         }
137
138         return 0;
139 }
140
141 U_BOOT_CMD(
142         led, 3, 1, do_led,
143         "led\t- ["
144 #ifdef CONFIG_BOARD_SPECIFIC_LED
145 #ifdef STATUS_LED_BIT
146         "0|"
147 #endif
148 #ifdef STATUS_LED_BIT1
149         "1|"
150 #endif
151 #ifdef STATUS_LED_BIT2
152         "2|"
153 #endif
154 #ifdef STATUS_LED_BIT3
155         "3|"
156 #endif
157 #endif
158 #ifdef STATUS_LED_GREEN
159         "green|"
160 #endif
161 #ifdef STATUS_LED_YELLOW
162         "yellow|"
163 #endif
164 #ifdef STATUS_LED_RED
165         "red|"
166 #endif
167 #ifdef STATUS_LED_BLUE
168         "blue|"
169 #endif
170         "all] [on|off|toggle]\n",
171         "led [led_name] [on|off|toggle] sets or clears led(s)\n"
172 );