This patch allows any at91 board implementing the GPIO LED API to control vendor specific LEDs from the console.
Adding configuration items CONFIG_AT91_LED and CONFIG_CMD_LED enables the command. Moreover the GPIO Pins have to be defined by CONFIG_GPIO_LEDS See doc/README.LED for detailed information.
Usage: led [LED_number] [on|off]
Signed-off-by: Daniel Gorsulowski Daniel.Gorsulowski@esd.eu --- cpu/arm926ejs/at91/Makefile | 1 + cpu/arm926ejs/at91/cmd_led.c | 60 +++++++++++++++++++++++++++++++++++++++ cpu/arm926ejs/at91/led.c | 29 +++++++++++++++++++ doc/README.LED | 40 ++++++++++++++++++++++++++ include/asm-arm/arch-at91/led.h | 42 +++++++++++++++++++++++++++ 5 files changed, 172 insertions(+), 0 deletions(-) create mode 100644 cpu/arm926ejs/at91/cmd_led.c create mode 100644 include/asm-arm/arch-at91/led.h
diff --git a/cpu/arm926ejs/at91/Makefile b/cpu/arm926ejs/at91/Makefile index e300d97..adfd192 100644 --- a/cpu/arm926ejs/at91/Makefile +++ b/cpu/arm926ejs/at91/Makefile @@ -54,6 +54,7 @@ ifdef CONFIG_AT91SAM9RL COBJS-y += at91sam9rl_serial.o COBJS-$(CONFIG_HAS_DATAFLASH) += at91sam9rl_spi.o endif +COBJS-$(CONFIG_CMD_LED) += cmd_led.o COBJS-$(CONFIG_AT91_LED) += led.o COBJS-y += clock.o COBJS-y += cpu.o diff --git a/cpu/arm926ejs/at91/cmd_led.c b/cpu/arm926ejs/at91/cmd_led.c new file mode 100644 index 0000000..45d634b --- /dev/null +++ b/cpu/arm926ejs/at91/cmd_led.c @@ -0,0 +1,60 @@ +/* + * (C) Copyright 2009 + * Daniel Gorsulowski daniel.gorsulowski@esd.eu + * esd electronic system design gmbh <www.esd.eu> + * + * 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 <asm/arch/led.h> + +int do_led(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + ulong led_nr; + unsigned on; + + /* Validate arguments */ + led_nr = simple_strtoul(argv[1], NULL, 10); + if (led_nr > CONFIG_LED_MAX) { + printf("Usage:\n%s\n", cmdtp->usage); + return 1; + } + + if (strcmp(argv[2], "off") == 0) { + on = 1; + } else if (strcmp(argv[2], "on") == 0) { + on = 0; + } else { + printf("Usage:\n%s\n", cmdtp->usage); + return 1; + } + + user_led(led_nr - 1, on); + + return 0; +} + +U_BOOT_CMD( + led, 3, 1, do_led, + "[LED_number] [on|off]", + "[LED_number] [on|off] turns LED on/off" +); diff --git a/cpu/arm926ejs/at91/led.c b/cpu/arm926ejs/at91/led.c index be68f59..b41a7c4 100644 --- a/cpu/arm926ejs/at91/led.c +++ b/cpu/arm926ejs/at91/led.c @@ -3,6 +3,10 @@ * Stelian Pop stelian.pop@leadtechdesign.com * Lead Tech Design <www.leadtechdesign.com> * + * (C) Copyright 2009 + * Daniel Gorsulowski daniel.gorsulowski@esd.eu + * esd electronic system design gmbh <www.esd.eu> + * * See file CREDITS for list of people who contributed to this * project. * @@ -27,6 +31,31 @@ #include <asm/arch/gpio.h> #include <asm/arch/io.h>
+#ifdef CONFIG_AT91_LED + +#if defined(CONFIG_AT91RM9200) +#include <asm/arch/at91rm9200.h> +#elif defined(CONFIG_AT91SAM9260) || defined(CONFIG_AT91SAM9G20) +#include <asm/arch/at91sam9260.h> +#elif defined(CONFIG_AT91SAM9261) +#include <asm/arch/at91sam9261.h> +#elif defined(CONFIG_AT91SAM9263) +#include <asm/arch/at91sam9263.h> +#elif defined(CONFIG_AT91SAM9RL) +#include <asm/arch/at91sam9rl.h> +#elif defined(CONFIG_AT91CAP9) +#include <asm/arch/at91cap9.h> +#endif + +#include <asm/arch/led.h> + +void user_led(ulong led_nr, unsigned on) +{ + at91_set_gpio_value(leds[led_nr], on); +} + +#endif /* CONFIG_AT91_LED */ + #ifdef CONFIG_RED_LED void red_LED_on(void) { diff --git a/doc/README.LED b/doc/README.LED index 1221177..06a741e 100644 --- a/doc/README.LED +++ b/doc/README.LED @@ -76,3 +76,43 @@ TBD : Describe older board dependent macros similar to what is done for CONFIG_TQM8xxL.
TBD : Describe general support via asm/status_led.h + + +GPIO LEDs +======================================== + +GPIO LEDs are presently only supported by at91. +this README describes the usage of the GPIO LED API. + +The API is defined by the include file include/asm-arm/arch-at91/led.h + +The first step is to define CONFIG_AT91_LED, CONFIG_LED_MAX and CONFIG_GPIO_LEDS +in the board config file. +I.e.: + /* LED */ + #define CONFIG_AT91_LED + #define CONFIG_LED_MAX ARRAY_SIZE(leds) + #define CONFIG_GPIO_LEDS { \ + AT91_PIN_PB8, \ + AT91_PIN_PB7 \ + } + +The second step is to initialize the Peripheral Clock Controller and the GPIO +pins in the vendor specific board code. +I.e.: + #ifdef CONFIG_AT91_LED + /* Enable clock */ + at91_sys_write(AT91_PMC_PCER, 1 << AT91SAM9263_ID_PIOB | + 1 << AT91SAM9263_ID_PIOCDE); + + /* Initialize GPIO pins */ + int i; + for(i = 0; i < CONFIG_LED_MAX; i++) { + at91_set_gpio_output(leds[i], 1); + at91_set_gpio_value(leds[i], 1); + } + #endif + +Now a new command "led" will be available in the U-Boot console. +Usage: +led [LED_number] [on|off] diff --git a/include/asm-arm/arch-at91/led.h b/include/asm-arm/arch-at91/led.h new file mode 100644 index 0000000..f55cb56 --- /dev/null +++ b/include/asm-arm/arch-at91/led.h @@ -0,0 +1,42 @@ +/* + * (C) Copyright 2009 + * Daniel Gorsulowski daniel.gorsulowski@esd.eu + * esd electronic system design gmbh <www.esd.eu> + * + * 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 + */ + +#ifndef __ASM_ARCH_LED_H +#define __ASM_ARCH_LED_H + +/* + * GPIO LEDs API + */ + +#include <asm/arch/gpio.h> + +static long leds[] = CONFIG_GPIO_LEDS; + +#ifndef __ASSEMBLY__ +extern void user_led(ulong led_nr, unsigned on); +#else + .extern user_led +#endif + +#endif /* __ASM_ARCH_LED_H */