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authorJason Kridner <jkridner@beagleboard.org>2011-04-18 17:22:44 -0400
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-04-27 19:38:05 +0200
commitb633f66f02ab3df6adc8fc65f13769e5fb9c328f (patch)
treec0720dddb80f62e4f6cc0376cd3d1f25428eec4b /common/cmd_led.c
parentcd4b8a6329072b971299a83373b6c8c2aafde44e (diff)
downloadu-boot-linaro-natty-b633f66f02ab3df6adc8fc65f13769e5fb9c328f.tar.gz
Add 'led' command
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>
Diffstat (limited to 'common/cmd_led.c')
-rw-r--r--common/cmd_led.c153
1 files changed, 153 insertions, 0 deletions
diff --git a/common/cmd_led.c b/common/cmd_led.c
new file mode 100644
index 000000000..f1e8a62cb
--- /dev/null
+++ b/common/cmd_led.c
@@ -0,0 +1,153 @@
+/*
+ * (C) Copyright 2010
+ * Jason Kridner <jkridner@beagleboard.org>
+ *
+ * Based on cmd_led.c patch from:
+ * http://www.mail-archive.com/u-boot@lists.denx.de/msg06873.html
+ * (C) Copyright 2008
+ * Ulf Samuelsson <ulf.samuelsson@atmel.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <command.h>
+#include <status_led.h>
+
+struct led_tbl_s {
+ char *string; /* String for use in the command */
+ led_id_t mask; /* Mask used for calling __led_set() */
+ void (*on)(void); /* Optional fucntion for turning LED on */
+ void (*off)(void); /* Optional fucntion for turning LED on */
+};
+
+typedef struct led_tbl_s led_tbl_t;
+
+static const led_tbl_t led_commands[] = {
+#ifdef CONFIG_BOARD_SPECIFIC_LED
+#ifdef STATUS_LED_BIT
+ { "0", STATUS_LED_BIT, NULL, NULL },
+#endif
+#ifdef STATUS_LED_BIT1
+ { "1", STATUS_LED_BIT1, NULL, NULL },
+#endif
+#ifdef STATUS_LED_BIT2
+ { "2", STATUS_LED_BIT2, NULL, NULL },
+#endif
+#ifdef STATUS_LED_BIT3
+ { "3", STATUS_LED_BIT3, NULL, NULL },
+#endif
+#endif
+#ifdef STATUS_LED_GREEN
+ { "green", STATUS_LED_GREEN, green_LED_off, green_LED_on },
+#endif
+#ifdef STATUS_LED_YELLOW
+ { "yellow", STATUS_LED_YELLOW, yellow_LED_off, yellow_LED_on },
+#endif
+#ifdef STATUS_LED_RED
+ { "red", STATUS_LED_RED, red_LED_off, red_LED_on },
+#endif
+#ifdef STATUS_LED_BLUE
+ { "blue", STATUS_LED_BLUE, blue_LED_off, blue_LED_on },
+#endif
+ { NULL, 0, NULL, NULL }
+};
+
+int str_onoff (char *var)
+{
+ if (strcmp(var, "off") == 0) {
+ return 0;
+ }
+ if (strcmp(var, "on") == 0) {
+ return 1;
+ }
+ return -1;
+}
+
+int do_led (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int state, i;
+
+ /* Validate arguments */
+ if ((argc != 3)) {
+ return cmd_usage(cmdtp);
+ }
+
+ state = str_onoff(argv[2]);
+ if (state < 0) {
+ return cmd_usage(cmdtp);
+ }
+
+ for (i = 0; led_commands[i].string; i++) {
+ if ((strcmp("all", argv[1]) == 0) ||
+ (strcmp(led_commands[i].string, argv[1]) == 0)) {
+ if (led_commands[i].on) {
+ if (state) {
+ led_commands[i].on();
+ } else {
+ led_commands[i].off();
+ }
+ } else {
+ __led_set(led_commands[i].mask, state);
+ }
+ break;
+ }
+ }
+
+ /* If we ran out of matches, print Usage */
+ if (!led_commands[i].string && !(strcmp("all", argv[1]) == 0)) {
+ return cmd_usage(cmdtp);
+ }
+
+ return 0;
+}
+
+U_BOOT_CMD(
+ led, 3, 1, do_led,
+ "led\t- ["
+#ifdef CONFIG_BOARD_SPECIFIC_LED
+#ifdef STATUS_LED_BIT
+ "0|"
+#endif
+#ifdef STATUS_LED_BIT1
+ "1|"
+#endif
+#ifdef STATUS_LED_BIT2
+ "2|"
+#endif
+#ifdef STATUS_LED_BIT3
+ "3|"
+#endif
+#endif
+#ifdef STATUS_LED_GREEN
+ "green|"
+#endif
+#ifdef STATUS_LED_YELLOW
+ "yellow|"
+#endif
+#ifdef STATUS_LED_RED
+ "red|"
+#endif
+#ifdef STATUS_LED_BLUE
+ "blue|"
+#endif
+ "all] [on|off]\n",
+ "led [led_name] [on|off] sets or clears led(s)\n"
+);