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