GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/cpu/arm920t/ep93xx/led.c

@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2010, 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+ */
+
+#include <asm/io.h>
+#include <asm/arch/ep93xx.h>
+#include <config.h>
+#include <status_led.h>
+
+static uint8_t saved_state[2] = {CONFIG_LED_STATUS_OFF, CONFIG_LED_STATUS_OFF};
+static uint32_t gpio_pin[2] = {1 << CONFIG_LED_STATUS_GREEN,
+			       1 << CONFIG_LED_STATUS_RED};
+
+static inline void switch_LED_on(uint8_t led)
+{
+	register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
+
+	writel(readl(&gpio->pedr) | gpio_pin[led], &gpio->pedr);
+	saved_state[led] = CONFIG_LED_STATUS_ON;
+}
+
+static inline void switch_LED_off(uint8_t led)
+{
+	register struct gpio_regs *gpio = (struct gpio_regs *)GPIO_BASE;
+
+	writel(readl(&gpio->pedr) & ~gpio_pin[led], &gpio->pedr);
+	saved_state[led] = CONFIG_LED_STATUS_OFF;
+}
+
+void red_led_on(void)
+{
+	switch_LED_on(CONFIG_LED_STATUS_RED);
+}
+
+void red_led_off(void)
+{
+	switch_LED_off(CONFIG_LED_STATUS_RED);
+}
+
+void green_led_on(void)
+{
+	switch_LED_on(CONFIG_LED_STATUS_GREEN);
+}
+
+void green_led_off(void)
+{
+	switch_LED_off(CONFIG_LED_STATUS_GREEN);
+}
+
+void __led_init(led_id_t mask, int state)
+{
+	__led_set(mask, state);
+}
+
+void __led_toggle(led_id_t mask)
+{
+	if (CONFIG_LED_STATUS_RED == mask) {
+		if (CONFIG_LED_STATUS_ON == saved_state[CONFIG_LED_STATUS_RED])
+			red_led_off();
+		else
+			red_led_on();
+	} else if (CONFIG_LED_STATUS_GREEN == mask) {
+		if (CONFIG_LED_STATUS_ON ==
+		    saved_state[CONFIG_LED_STATUS_GREEN])
+			green_led_off();
+		else
+			green_led_on();
+	}
+}
+
+void __led_set(led_id_t mask, int state)
+{
+	if (CONFIG_LED_STATUS_RED == mask) {
+		if (CONFIG_LED_STATUS_ON == state)
+			red_led_on();
+		else
+			red_led_off();
+	} else if (CONFIG_LED_STATUS_GREEN == mask) {
+		if (CONFIG_LED_STATUS_ON == state)
+			green_led_on();
+		else
+			green_led_off();
+	}
+}