MIPS: Add VCT board series support (Part 2/3)

Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 88 insertions, 0 deletions

diff --git a/board/micronas/vct/gpio.c b/board/micronas/vct/gpio.c
new file mode 100644
index 00000000000..2c113be2628
--- /dev/null
+++ b/board/micronas/vct/gpio.c
@@ -0,0 +1,88 @@
+/*
+ * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#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);
+}