Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / micronas / vct / gpio.c

diff --git a/qemu/roms/u-boot/board/micronas/vct/gpio.c b/qemu/roms/u-boot/board/micronas/vct/gpio.c
new file mode 100644 (file)
index 0000000..1eaa89f
--- /dev/null
+++ b/qemu/roms/u-boot/board/micronas/vct/gpio.c
@@ -0,0 +1,75 @@
+/*
+ * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include "vct.h"
+
+/*
+ * Find out to which of the 2 gpio modules the pin specified in the
+ * argument belongs:
+ * GPIO_MODULE yields 0 for pins  0 to 31,
+ *                    1 for pins 32 to 63
+ */
+#define GPIO_MODULE(pin)       ((pin) >> 5)
+
+/*
+ * Bit position within a 32-bit peripheral register (where every
+ * bit is one bitslice)
+ */
+#define MASK(pin)              (1 << ((pin) & 0x1F))
+#define BASE_ADDR(mod)         module_base[mod]
+
+/*
+ * Lookup table for transforming gpio module number 0 to 2 to
+ * address offsets
+ */
+static u32 module_base[] = {
+       GPIO1_BASE,
+       GPIO2_BASE
+};
+
+static void clrsetbits(u32 addr, u32 and_mask, u32 or_mask)
+{
+       reg_write(addr, (reg_read(addr) & ~and_mask) | or_mask);
+}
+
+int vct_gpio_dir(int pin, int dir)
+{
+       u32 gpio_base;
+
+       gpio_base = BASE_ADDR(GPIO_MODULE(pin));
+
+       if (dir == 0)
+               clrsetbits(GPIO_SWPORTA_DDR(gpio_base), MASK(pin), 0);
+       else
+               clrsetbits(GPIO_SWPORTA_DDR(gpio_base), 0, MASK(pin));
+
+       return 0;
+}
+
+void vct_gpio_set(int pin, int val)
+{
+       u32 gpio_base;
+
+       gpio_base = BASE_ADDR(GPIO_MODULE(pin));
+
+       if (val == 0)
+               clrsetbits(GPIO_SWPORTA_DR(gpio_base), MASK(pin), 0);
+       else
+               clrsetbits(GPIO_SWPORTA_DR(gpio_base), 0, MASK(pin));
+}
+
+int vct_gpio_get(int pin)
+{
+       u32 gpio_base;
+       u32 value;
+
+       gpio_base = BASE_ADDR(GPIO_MODULE(pin));
+       value = reg_read(GPIO_EXT_PORTA(gpio_base));
+
+       return ((value & MASK(pin)) ? 1 : 0);
+}