Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / gpio / spear_gpio.c

diff --git a/qemu/roms/u-boot/drivers/gpio/spear_gpio.c b/qemu/roms/u-boot/drivers/gpio/spear_gpio.c
new file mode 100644 (file)
index 0000000..367b670
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/gpio/spear_gpio.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2012 Stefan Roese <sr@denx.de>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * Driver for SPEAr600 GPIO controller
+ */
+
+#include <common.h>
+#include <asm/arch/hardware.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <errno.h>
+
+static int gpio_direction(unsigned gpio,
+                         enum gpio_direction direction)
+{
+       struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
+       u32 val;
+
+       val = readl(&regs->gpiodir);
+
+       if (direction == GPIO_DIRECTION_OUT)
+               val |= 1 << gpio;
+       else
+               val &= ~(1 << gpio);
+
+       writel(val, &regs->gpiodir);
+
+       return 0;
+}
+
+int gpio_set_value(unsigned gpio, int value)
+{
+       struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
+
+       writel(1 << gpio, &regs->gpiodata[DATA_REG_ADDR(gpio)]);
+
+       return 0;
+}
+
+int gpio_get_value(unsigned gpio)
+{
+       struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
+       u32 val;
+
+       val = readl(&regs->gpiodata[DATA_REG_ADDR(gpio)]);
+
+       return !!val;
+}
+
+int gpio_request(unsigned gpio, const char *label)
+{
+       if (gpio >= SPEAR_GPIO_COUNT)
+               return -EINVAL;
+
+       return 0;
+}
+
+int gpio_free(unsigned gpio)
+{
+       return 0;
+}
+
+void gpio_toggle_value(unsigned gpio)
+{
+       gpio_set_value(gpio, !gpio_get_value(gpio));
+}
+
+int gpio_direction_input(unsigned gpio)
+{
+       return gpio_direction(gpio, GPIO_DIRECTION_IN);
+}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+       int ret = gpio_direction(gpio, GPIO_DIRECTION_OUT);
+
+       if (ret < 0)
+               return ret;
+
+       gpio_set_value(gpio, value);
+       return 0;
+}