This patch allows any board implementing the coloured LED API to control the LEDs from the console. led [green | yellow | red | all ] [ on | off ] or led [ 1 | 2 | 3 | all ] [ on | off ] Adds configuration item CONFIG_CMD_LED enabling the command. Partially based on patch from Ulf Samuelsson: http://www.mail-archive.com/u-boot@lists.denx.de/msg09593.html. Updated based on feedback: http://www.mail-archive.com/u-boot@lists.denx.de/msg41847.html https://groups.google.com/d/topic/beagleboard/8Wf1HiK_QBo/discussion * Fixed a handful of style issues. * Significantly reduced the number of #ifdefs and redundant code * Converted redundant code into loops test against a structure * Made use of cmd_usage() * Introduced a str_onoff() function, but haven't yet put it in common * Eliminated trailing newline Signed-off-by: Jason Kridner <jkridner@beagleboard.org> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>master
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/*
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* (C) Copyright 2010 |
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* Jason Kridner <jkridner@beagleboard.org> |
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* |
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* Based on cmd_led.c patch from: |
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* http://www.mail-archive.com/u-boot@lists.denx.de/msg06873.html
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* (C) Copyright 2008 |
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* Ulf Samuelsson <ulf.samuelsson@atmel.com> |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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#include <config.h> |
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#include <command.h> |
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#include <status_led.h> |
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struct led_tbl_s { |
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char *string; /* String for use in the command */ |
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led_id_t mask; /* Mask used for calling __led_set() */ |
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void (*on)(void); /* Optional fucntion for turning LED on */ |
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void (*off)(void); /* Optional fucntion for turning LED on */ |
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}; |
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typedef struct led_tbl_s led_tbl_t; |
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static const led_tbl_t led_commands[] = { |
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#ifdef CONFIG_BOARD_SPECIFIC_LED |
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#ifdef STATUS_LED_BIT |
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{ "0", STATUS_LED_BIT, NULL, NULL }, |
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#endif |
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#ifdef STATUS_LED_BIT1 |
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{ "1", STATUS_LED_BIT1, NULL, NULL }, |
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#endif |
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#ifdef STATUS_LED_BIT2 |
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{ "2", STATUS_LED_BIT2, NULL, NULL }, |
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#endif |
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#ifdef STATUS_LED_BIT3 |
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{ "3", STATUS_LED_BIT3, NULL, NULL }, |
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#endif |
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#endif |
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#ifdef STATUS_LED_GREEN |
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{ "green", STATUS_LED_GREEN, green_LED_off, green_LED_on }, |
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#endif |
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#ifdef STATUS_LED_YELLOW |
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{ "yellow", STATUS_LED_YELLOW, yellow_LED_off, yellow_LED_on }, |
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#endif |
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#ifdef STATUS_LED_RED |
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{ "red", STATUS_LED_RED, red_LED_off, red_LED_on }, |
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#endif |
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#ifdef STATUS_LED_BLUE |
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{ "blue", STATUS_LED_BLUE, blue_LED_off, blue_LED_on }, |
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#endif |
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{ NULL, 0, NULL, NULL } |
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}; |
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int str_onoff (char *var) |
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{ |
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if (strcmp(var, "off") == 0) { |
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return 0; |
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} |
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if (strcmp(var, "on") == 0) { |
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return 1; |
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} |
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return -1; |
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} |
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int do_led (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
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{ |
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int state, i; |
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/* Validate arguments */ |
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if ((argc != 3)) { |
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return cmd_usage(cmdtp); |
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} |
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state = str_onoff(argv[2]); |
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if (state < 0) { |
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return cmd_usage(cmdtp); |
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} |
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for (i = 0; led_commands[i].string; i++) { |
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if ((strcmp("all", argv[1]) == 0) ||
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(strcmp(led_commands[i].string, argv[1]) == 0)) { |
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if (led_commands[i].on) { |
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if (state) { |
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led_commands[i].on(); |
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} else { |
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led_commands[i].off(); |
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} |
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} else { |
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__led_set(led_commands[i].mask, state); |
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} |
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break; |
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} |
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} |
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/* If we ran out of matches, print Usage */ |
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if (!led_commands[i].string && !(strcmp("all", argv[1]) == 0)) { |
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return cmd_usage(cmdtp); |
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} |
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return 0; |
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} |
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U_BOOT_CMD( |
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led, 3, 1, do_led, |
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"led\t- [" |
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#ifdef CONFIG_BOARD_SPECIFIC_LED |
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#ifdef STATUS_LED_BIT |
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"0|" |
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#endif |
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#ifdef STATUS_LED_BIT1 |
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"1|" |
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#endif |
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#ifdef STATUS_LED_BIT2 |
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"2|" |
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#endif |
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#ifdef STATUS_LED_BIT3 |
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"3|" |
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#endif |
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#endif |
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#ifdef STATUS_LED_GREEN |
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"green|" |
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#endif |
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#ifdef STATUS_LED_YELLOW |
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"yellow|" |
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#endif |
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#ifdef STATUS_LED_RED |
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"red|" |
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#endif |
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#ifdef STATUS_LED_BLUE |
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"blue|" |
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#endif |
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"all] [on|off]\n", |
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"led [led_name] [on|off] sets or clears led(s)\n" |
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); |
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