Add qemu 2.4.0

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

diff --git a/qemu/roms/u-boot/drivers/gpio/kw_gpio.c b/qemu/roms/u-boot/drivers/gpio/kw_gpio.c
new file mode 100644 (file)
index 0000000..0af75a8
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/gpio/kw_gpio.c
@@ -0,0 +1,150 @@
+/*
+ * arch/arm/plat-orion/gpio.c
+ *
+ * Marvell Orion SoC GPIO handling.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * Based on (mostly copied from) plat-orion based Linux 2.6 kernel driver.
+ * Removed orion_gpiochip struct and kernel level irq handling.
+ *
+ * Dieter Kiermaier dk-arm-linux@gmx.de
+ */
+
+#include <common.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/arch/kirkwood.h>
+#include <asm/arch/gpio.h>
+
+static unsigned long gpio_valid_input[BITS_TO_LONGS(GPIO_MAX)];
+static unsigned long gpio_valid_output[BITS_TO_LONGS(GPIO_MAX)];
+
+void __set_direction(unsigned pin, int input)
+{
+       u32 u;
+
+       u = readl(GPIO_IO_CONF(pin));
+       if (input)
+               u |= 1 << (pin & 31);
+       else
+               u &= ~(1 << (pin & 31));
+       writel(u, GPIO_IO_CONF(pin));
+
+       u = readl(GPIO_IO_CONF(pin));
+}
+
+void __set_level(unsigned pin, int high)
+{
+       u32 u;
+
+       u = readl(GPIO_OUT(pin));
+       if (high)
+               u |= 1 << (pin & 31);
+       else
+               u &= ~(1 << (pin & 31));
+       writel(u, GPIO_OUT(pin));
+}
+
+void __set_blinking(unsigned pin, int blink)
+{
+       u32 u;
+
+       u = readl(GPIO_BLINK_EN(pin));
+       if (blink)
+               u |= 1 << (pin & 31);
+       else
+               u &= ~(1 << (pin & 31));
+       writel(u, GPIO_BLINK_EN(pin));
+}
+
+int kw_gpio_is_valid(unsigned pin, int mode)
+{
+       if (pin < GPIO_MAX) {
+               if ((mode & GPIO_INPUT_OK) && !test_bit(pin, gpio_valid_input))
+                       goto err_out;
+
+               if ((mode & GPIO_OUTPUT_OK) && !test_bit(pin, gpio_valid_output))
+                       goto err_out;
+               return 0;
+       }
+
+err_out:
+               printf("%s: invalid GPIO %d\n", __func__, pin);
+       return 1;
+}
+
+void kw_gpio_set_valid(unsigned pin, int mode)
+{
+       if (mode == 1)
+               mode = GPIO_INPUT_OK | GPIO_OUTPUT_OK;
+       if (mode & GPIO_INPUT_OK)
+               __set_bit(pin, gpio_valid_input);
+       else
+               __clear_bit(pin, gpio_valid_input);
+       if (mode & GPIO_OUTPUT_OK)
+               __set_bit(pin, gpio_valid_output);
+       else
+               __clear_bit(pin, gpio_valid_output);
+}
+/*
+ * GENERIC_GPIO primitives.
+ */
+int kw_gpio_direction_input(unsigned pin)
+{
+       if (kw_gpio_is_valid(pin, GPIO_INPUT_OK) != 0)
+               return 1;
+
+       /* Configure GPIO direction. */
+       __set_direction(pin, 1);
+
+       return 0;
+}
+
+int kw_gpio_direction_output(unsigned pin, int value)
+{
+       if (kw_gpio_is_valid(pin, GPIO_OUTPUT_OK) != 0)
+       {
+               printf("%s: invalid GPIO %d\n", __func__, pin);
+               return 1;
+       }
+
+       __set_blinking(pin, 0);
+
+       /* Configure GPIO output value. */
+       __set_level(pin, value);
+
+       /* Configure GPIO direction. */
+       __set_direction(pin, 0);
+
+       return 0;
+}
+
+int kw_gpio_get_value(unsigned pin)
+{
+       int val;
+
+       if (readl(GPIO_IO_CONF(pin)) & (1 << (pin & 31)))
+               val = readl(GPIO_DATA_IN(pin)) ^ readl(GPIO_IN_POL(pin));
+       else
+               val = readl(GPIO_OUT(pin));
+
+       return (val >> (pin & 31)) & 1;
+}
+
+void kw_gpio_set_value(unsigned pin, int value)
+{
+       /* Configure GPIO output value. */
+       __set_level(pin, value);
+}
+
+void kw_gpio_set_blink(unsigned pin, int blink)
+{
+       /* Set output value to zero. */
+       __set_level(pin, 0);
+
+       /* Set blinking. */
+       __set_blinking(pin, blink);
+}