--- 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