openwrt-xburst/target/linux/cns3xxx/patches-3.3/104-cns3xxx_gpio.patch

--- a/arch/arm/mach-cns3xxx/cns3420vb.c
+++ b/arch/arm/mach-cns3xxx/cns3420vb.c
@@ -216,7 +216,7 @@ static struct map_desc cns3420_io_desc[]
 
 static void __init cns3420_map_io(void)
 {
-	cns3xxx_map_io();
+	cns3xxx_common_init();
 	iotable_init(cns3420_io_desc, ARRAY_SIZE(cns3420_io_desc));
 
 	cns3420_early_serial_setup();
--- a/arch/arm/mach-cns3xxx/core.c
+++ b/arch/arm/mach-cns3xxx/core.c
@@ -21,6 +21,7 @@
 #include <asm/hardware/gic.h>
 #include <asm/smp_twd.h>
 #include <asm/hardware/cache-l2x0.h>
+#include <asm/gpio.h>
 #include <mach/cns3xxx.h>
 #include "core.h"
 
@@ -72,12 +73,73 @@ static struct map_desc cns3xxx_io_desc[]
 	},
 };
 
-void __init cns3xxx_map_io(void)
+static inline void gpio_line_config(u8 line, u32 direction)
+{
+	u32 reg;
+	if (direction) {
+		if (line < 32) {
+			reg = __raw_readl(CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg |= (1 << line);
+			__raw_writel(reg, CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		} else {
+			reg = __raw_readl(CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg |= (1 << (line - 32));
+			__raw_writel(reg, CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		}
+	} else {
+		if (line < 32) {
+			reg = __raw_readl(CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg &= ~(1 << line);
+			__raw_writel(reg, CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		} else {
+			reg = __raw_readl(CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+			reg &= ~(1 << (line - 32));
+			__raw_writel(reg, CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
+		}
+	}
+}
+
+static int cns3xxx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+	gpio_line_config(gpio, CNS3XXX_GPIO_IN);
+	return 0;
+}
+
+static int cns3xxx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
+{
+	gpio_line_set(gpio, level);
+	gpio_line_config(gpio, CNS3XXX_GPIO_OUT);
+	return 0;
+}
+
+static int cns3xxx_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+	return gpio_get_value(gpio);
+}
+
+static void cns3xxx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
+{
+	gpio_set_value(gpio, value);
+}
+
+static struct gpio_chip cns3xxx_gpio_chip = {
+	.label			= "CNS3XXX_GPIO_CHIP",
+	.direction_input	= cns3xxx_gpio_direction_input,
+	.direction_output	= cns3xxx_gpio_direction_output,
+	.get			= cns3xxx_gpio_get_value,
+	.set			= cns3xxx_gpio_set_value,
+	.base			= 0,
+	.ngpio			= 64,
+};
+
+void __init cns3xxx_common_init(void)
 {
 #ifdef CONFIG_LOCAL_TIMERS
 	twd_base = (void __iomem *) CNS3XXX_TC11MP_TWD_BASE_VIRT;
 #endif
 	iotable_init(cns3xxx_io_desc, ARRAY_SIZE(cns3xxx_io_desc));
+
+	gpiochip_add(&cns3xxx_gpio_chip);
 }
 
 /* used by entry-macro.S */
--- a/arch/arm/mach-cns3xxx/core.h
+++ b/arch/arm/mach-cns3xxx/core.h
@@ -21,7 +21,7 @@ void __init cns3xxx_l2x0_init(void);
 static inline void cns3xxx_l2x0_init(void) {}
 #endif /* CONFIG_CACHE_L2X0 */
 
-void __init cns3xxx_map_io(void);
+void __init cns3xxx_common_init(void);
 void __init cns3xxx_init_irq(void);
 void cns3xxx_power_off(void);
 void cns3xxx_restart(char, const char *);
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -366,6 +366,7 @@ config ARCH_CLPS711X
 config ARCH_CNS3XXX
 	bool "Cavium Networks CNS3XXX family"
 	select CPU_V6K
+	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select GENERIC_CLOCKEVENTS
 	select ARM_GIC
 	select CLKDEV_LOOKUP
--- /dev/null
+++ b/arch/arm/mach-cns3xxx/include/mach/gpio.h
@@ -0,0 +1,98 @@
+/*
+ * arch/arm/mach-cns3xxx/include/mach/gpio.h
+ *
+ * CNS3xxx GPIO wrappers for arch-neutral GPIO calls
+ *
+ * Copyright 2011 Gateworks Corporation
+ *		  Chris Lang <clang@gateworks.com>
+ *
+ * Based on IXP implementation by Milan Svoboda <msvoboda@ra.rockwell.com>
+ * Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * 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
+ *
+ */
+
+#ifndef __ASM_ARCH_CNS3XXX_GPIO_H
+#define __ASM_ARCH_CNS3XXX_GPIO_H
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <mach/platform.h>
+#include <asm-generic/gpio.h>			/* cansleep wrappers */
+
+#define NR_BUILTIN_GPIO 64
+
+#define CNS3XXX_GPIO_IN    0x0
+#define CNS3XXX_GPIO_OUT   0x1
+
+#define CNS3XXX_GPIO_LO   0
+#define CNS3XXX_GPIO_HI   1
+
+#define CNS3XXX_GPIO_OUTPUT         0x00
+#define CNS3XXX_GPIO_INPUT          0x04
+#define CNS3XXX_GPIO_DIR            0x08
+#define CNS3XXX_GPIO_SET            0x10
+#define CNS3XXX_GPIO_CLEAR          0x14
+
+static inline void gpio_line_get(u8 line, int *value)
+{
+	if (line < 32)
+		*value = ((__raw_readl(CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_INPUT) >> line) & 0x1);
+	else
+		*value = ((__raw_readl(CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_INPUT) >> (line - 32)) & 0x1);
+}
+
+static inline void gpio_line_set(u8 line, int value)
+{
+	if (line < 32) {
+		if (value)
+			__raw_writel((1 << line), CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_SET);
+		else
+			__raw_writel((1 << line), CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_CLEAR);
+	} else {
+		if (value)
+			__raw_writel((1 << line), CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_SET);
+		else
+			__raw_writel((1 << line), CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_CLEAR);
+	}
+}
+
+static inline int gpio_get_value(unsigned gpio)
+{
+	if (gpio < NR_BUILTIN_GPIO)
+	{
+		int value;
+		gpio_line_get(gpio, &value);
+		return value;
+	}
+	else
+		return __gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+	if (gpio < NR_BUILTIN_GPIO)
+		gpio_line_set(gpio, value);
+	else
+		__gpio_set_value(gpio, value);
+}
+
+#define gpio_cansleep __gpio_cansleep
+
+extern int gpio_to_irq(int gpio);
+extern int irq_to_gpio(int gpio);
+
+#endif