1 files changed, 136 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/drivers/gpio/mxc_gpio.c b/qemu/roms/u-boot/drivers/gpio/mxc_gpio.c
new file mode 100644
index 000000000..6a572d545
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/gpio/mxc_gpio.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2009
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
+ *
+ * Copyright (C) 2011
+ * Stefano Babic, DENX Software Engineering, <sbabic@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <errno.h>
+
+enum mxc_gpio_direction {
+	MXC_GPIO_DIRECTION_IN,
+	MXC_GPIO_DIRECTION_OUT,
+};
+
+#define GPIO_TO_PORT(n)		(n / 32)
+
+/* GPIO port description */
+static unsigned long gpio_ports[] = {
+	[0] = GPIO1_BASE_ADDR,
+	[1] = GPIO2_BASE_ADDR,
+	[2] = GPIO3_BASE_ADDR,
+#if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
+		defined(CONFIG_MX53) || defined(CONFIG_MX6)
+	[3] = GPIO4_BASE_ADDR,
+#endif
+#if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6)
+	[4] = GPIO5_BASE_ADDR,
+	[5] = GPIO6_BASE_ADDR,
+#endif
+#if defined(CONFIG_MX53) || defined(CONFIG_MX6)
+	[6] = GPIO7_BASE_ADDR,
+#endif
+};
+
+static int mxc_gpio_direction(unsigned int gpio,
+	enum mxc_gpio_direction direction)
+{
+	unsigned int port = GPIO_TO_PORT(gpio);
+	struct gpio_regs *regs;
+	u32 l;
+
+	if (port >= ARRAY_SIZE(gpio_ports))
+		return -1;
+
+	gpio &= 0x1f;
+
+	regs = (struct gpio_regs *)gpio_ports[port];
+
+	l = readl(&regs->gpio_dir);
+
+	switch (direction) {
+	case MXC_GPIO_DIRECTION_OUT:
+		l |= 1 << gpio;
+		break;
+	case MXC_GPIO_DIRECTION_IN:
+		l &= ~(1 << gpio);
+	}
+	writel(l, &regs->gpio_dir);
+
+	return 0;
+}
+
+int gpio_set_value(unsigned gpio, int value)
+{
+	unsigned int port = GPIO_TO_PORT(gpio);
+	struct gpio_regs *regs;
+	u32 l;
+
+	if (port >= ARRAY_SIZE(gpio_ports))
+		return -1;
+
+	gpio &= 0x1f;
+
+	regs = (struct gpio_regs *)gpio_ports[port];
+
+	l = readl(&regs->gpio_dr);
+	if (value)
+		l |= 1 << gpio;
+	else
+		l &= ~(1 << gpio);
+	writel(l, &regs->gpio_dr);
+
+	return 0;
+}
+
+int gpio_get_value(unsigned gpio)
+{
+	unsigned int port = GPIO_TO_PORT(gpio);
+	struct gpio_regs *regs;
+	u32 val;
+
+	if (port >= ARRAY_SIZE(gpio_ports))
+		return -1;
+
+	gpio &= 0x1f;
+
+	regs = (struct gpio_regs *)gpio_ports[port];
+
+	val = (readl(&regs->gpio_psr) >> gpio) & 0x01;
+
+	return val;
+}
+
+int gpio_request(unsigned gpio, const char *label)
+{
+	unsigned int port = GPIO_TO_PORT(gpio);
+	if (port >= ARRAY_SIZE(gpio_ports))
+		return -1;
+	return 0;
+}
+
+int gpio_free(unsigned gpio)
+{
+	return 0;
+}
+
+int gpio_direction_input(unsigned gpio)
+{
+	return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_IN);
+}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+	int ret = gpio_set_value(gpio, value);
+
+	if (ret < 0)
+		return ret;
+
+	return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_OUT);
+}