Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / arm926ejs / nomadik / gpio.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/nomadik/gpio.c b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/nomadik/gpio.c
new file mode 100644 (file)
index 0000000..eff5b2b
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/nomadik/gpio.c
@@ -0,0 +1,83 @@
+/*
+ * (C) Copyright 2009 Alessandro Rubini
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/gpio.h>
+
+static unsigned long gpio_base[4] = {
+       NOMADIK_GPIO0_BASE,
+       NOMADIK_GPIO1_BASE,
+       NOMADIK_GPIO2_BASE,
+       NOMADIK_GPIO3_BASE
+};
+
+enum gpio_registers {
+       GPIO_DAT =      0x00,           /* data register */
+       GPIO_DATS =     0x04,           /* data set */
+       GPIO_DATC =     0x08,           /* data clear */
+       GPIO_PDIS =     0x0c,           /* pull disable */
+       GPIO_DIR =      0x10,           /* direction */
+       GPIO_DIRS =     0x14,           /* direction set */
+       GPIO_DIRC =     0x18,           /* direction clear */
+       GPIO_AFSLA =    0x20,           /* alternate function select A */
+       GPIO_AFSLB =    0x24,           /* alternate function select B */
+};
+
+static inline unsigned long gpio_to_base(int gpio)
+{
+       return gpio_base[gpio / 32];
+}
+
+static inline u32 gpio_to_bit(int gpio)
+{
+       return 1 << (gpio & 0x1f);
+}
+
+void nmk_gpio_af(int gpio, int alternate_function)
+{
+       unsigned long base = gpio_to_base(gpio);
+       u32 bit = gpio_to_bit(gpio);
+       u32 afunc, bfunc;
+
+       /* alternate function is 0..3, with one bit per register */
+       afunc = readl(base + GPIO_AFSLA) & ~bit;
+       bfunc = readl(base + GPIO_AFSLB) & ~bit;
+       if (alternate_function & 1) afunc |= bit;
+       if (alternate_function & 2) bfunc |= bit;
+       writel(afunc, base + GPIO_AFSLA);
+       writel(bfunc, base + GPIO_AFSLB);
+}
+
+void nmk_gpio_dir(int gpio, int dir)
+{
+       unsigned long base = gpio_to_base(gpio);
+       u32 bit = gpio_to_bit(gpio);
+
+       if (dir)
+               writel(bit, base + GPIO_DIRS);
+       else
+               writel(bit, base + GPIO_DIRC);
+}
+
+void nmk_gpio_set(int gpio, int val)
+{
+       unsigned long base = gpio_to_base(gpio);
+       u32 bit = gpio_to_bit(gpio);
+
+       if (val)
+               writel(bit, base + GPIO_DATS);
+       else
+               writel(bit, base + GPIO_DATC);
+}
+
+int nmk_gpio_get(int gpio)
+{
+       unsigned long base = gpio_to_base(gpio);
+       u32 bit = gpio_to_bit(gpio);
+
+       return readl(base + GPIO_DAT) & bit;
+}