Convert au1000 to using gpiolib, fixes an oops on startup

SVN-Revision: 13935

1 files changed, 399 insertions, 0 deletions

diff --git a/target/linux/au1000/patches-2.6.27/007-gpiolib.patch b/target/linux/au1000/patches-2.6.27/007-gpiolib.patch
new file mode 100644
index 0000000000..1cd73d7dcf
--- /dev/null
+++ b/target/linux/au1000/patches-2.6.27/007-gpiolib.patch
@@ -0,0 +1,399 @@
+diff -urN linux-2.6.27.7/arch/mips/au1000/Kconfig linux-2.6.27.7.new/arch/mips/au1000/Kconfig
+--- linux-2.6.27.7/arch/mips/au1000/Kconfig	2008-11-21 00:02:37.000000000 +0100
++++ linux-2.6.27.7.new/arch/mips/au1000/Kconfig	2008-12-08 11:44:09.000000000 +0100
+@@ -134,3 +134,4 @@
+ 	select SYS_HAS_CPU_MIPS32_R1
+ 	select SYS_SUPPORTS_32BIT_KERNEL
+ 	select SYS_SUPPORTS_APM_EMULATION
++	select ARCH_REQUIRE_GPIOLIB
+diff -urN linux-2.6.27.7/arch/mips/au1000/common/gpio.c linux-2.6.27.7.new/arch/mips/au1000/common/gpio.c
+--- linux-2.6.27.7/arch/mips/au1000/common/gpio.c	2008-11-21 00:02:37.000000000 +0100
++++ linux-2.6.27.7.new/arch/mips/au1000/common/gpio.c	2008-12-08 11:58:30.000000000 +0100
+@@ -1,5 +1,5 @@
+ /*
+- *  Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
++ *  Copyright (C) 2007-2008, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
+  *  	Architecture specific GPIO support
+  *
+  *  This program is free software; you can redistribute	 it and/or modify it
+@@ -27,122 +27,222 @@
+  * 	others have a second one : GPIO2
+  */
+ 
++#include <linux/kernel.h>
+ #include <linux/module.h>
++#include <linux/types.h>
++#include <linux/platform_device.h>
++#include <linux/gpio.h>
+ 
+ #include <asm/mach-au1x00/au1000.h>
+-#include <asm/gpio.h>
++#include <asm/mach-au1x00/gpio.h>
+ 
+-#define gpio1 sys
+-#if !defined(CONFIG_SOC_AU1000)
++struct au1000_gpio_chip {
++	struct gpio_chip	chip;
++	void __iomem		*regbase;
++};
+ 
+-static struct au1x00_gpio2 *const gpio2 = (struct au1x00_gpio2 *) GPIO2_BASE;
++#if !defined(CONFIG_SOC_AU1000)
+ #define GPIO2_OUTPUT_ENABLE_MASK 	0x00010000
+ 
+-static int au1xxx_gpio2_read(unsigned gpio)
++/*
++ * Return GPIO bank 2 level
++ */
++static int au1000_gpio2_get(struct gpio_chip *chip, unsigned offset)
+ {
+-	gpio -= AU1XXX_GPIO_BASE;
+-	return ((gpio2->pinstate >> gpio) & 0x01);
++	u32 mask = 1 << offset;
++	struct au1000_gpio_chip	*gpch;
++	
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	return readl(gpch->regbase + AU1000_GPIO2_ST) & mask;
+ }
+ 
+-static void au1xxx_gpio2_write(unsigned gpio, int value)
++/*
++ * Set output GPIO bank 2 level
++ */
++static void au1000_gpio2_set(struct gpio_chip *chip,
++				unsigned offset, int value)
+ {
+-	gpio -= AU1XXX_GPIO_BASE;
+-
+-	gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) | ((!!value) << gpio);
++	u32			mask = (!!value) << offset;
++	struct au1000_gpio_chip	*gpch;
++	unsigned long		flags;
++
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	
++	local_irq_save(flags);
++	writel((GPIO2_OUTPUT_ENABLE_MASK << offset) | mask,
++				gpch->regbase + AU1000_GPIO2_OUT);
++	local_irq_restore(flags);
+ }
+ 
+-static int au1xxx_gpio2_direction_input(unsigned gpio)
++/*
++ * Set GPIO bank 2 direction to input
++ */
++static int au1000_gpio2_direction_input(struct gpio_chip *chip, unsigned offset)
+ {
+-	gpio -= AU1XXX_GPIO_BASE;
+-	gpio2->dir &= ~(0x01 << gpio);
++	unsigned long 		flags;
++	u32			mask = 1 << offset;
++	u32			value;
++	struct au1000_gpio_chip	*gpch;
++	void __iomem		*gpdr;
++
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	gpdr = gpch->regbase + AU1000_GPIO2_DIR;
++
++	local_irq_save(flags);
++	value = readl(gpdr);
++	value &= ~mask;
++	writel(value, gpdr);
++	local_irq_restore(flags);
++
+ 	return 0;
+ }
+ 
+-static int au1xxx_gpio2_direction_output(unsigned gpio, int value)
++/*
++ * Set GPIO bank2 direction to output
++ */
++static int au1000_gpio2_direction_output(struct gpio_chip *chip,
++					unsigned offset, int value)
+ {
+-	gpio -= AU1XXX_GPIO_BASE;
+-	gpio2->dir |= 0x01 << gpio;
+-	gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) | ((!!value) << gpio);
++	unsigned long		flags;
++	u32			mask = 1 << offset;
++	u32			tmp;
++	struct au1000_gpio_chip	*gpch;
++	void __iomem		*gpdr;
++	
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	gpdr = gpch->regbase + AU1000_GPIO2_DIR;
++	
++	local_irq_save(flags);
++	tmp = readl(gpdr);
++	tmp |= mask;
++	writel(tmp, gpdr);
++	mask = (!!value) << offset;
++        writel((GPIO2_OUTPUT_ENABLE_MASK << offset) | mask,
++	                                gpch->regbase + AU1000_GPIO2_OUT);
++	local_irq_restore(flags);
++
+ 	return 0;
+ }
+-
+ #endif /* !defined(CONFIG_SOC_AU1000) */
+ 
+-static int au1xxx_gpio1_read(unsigned gpio)
++/*
++ * Return GPIO bank 2 level
++ */
++static int au1000_gpio1_get(struct gpio_chip *chip, unsigned offset)
+ {
+-	return (gpio1->pinstaterd >> gpio) & 0x01;
++	u32			mask = 1 << offset;
++	struct au1000_gpio_chip	*gpch;
++
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	return readl(gpch->regbase + 0x0110) & mask;
+ }
+ 
+-static void au1xxx_gpio1_write(unsigned gpio, int value)
++/*
++ * Set GPIO bank 1 level
++ */
++static void au1000_gpio1_set(struct gpio_chip *chip,
++				unsigned offset, int value)
+ {
++	unsigned long		flags;
++	u32			mask = 1 << offset;
++	struct au1000_gpio_chip	*gpch;
++
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	
++	local_irq_save(flags);
+ 	if (value)
+-		gpio1->outputset = (0x01 << gpio);
++		writel(mask, gpch->regbase + 0x0108);	
+ 	else
+-		/* Output a zero */
+-		gpio1->outputclr = (0x01 << gpio);
++		writel(mask, gpch->regbase + 0x010C);
++	local_irq_restore(flags);
+ }
+ 
+-static int au1xxx_gpio1_direction_input(unsigned gpio)
++/*
++ * Set GPIO bank 1 direction to input
++ */
++static int au1000_gpio1_direction_input(struct gpio_chip *chip, unsigned offset)
+ {
+-	gpio1->pininputen = (0x01 << gpio);
+-	return 0;
+-}
++	unsigned long		flags;
++	u32			mask = 1 << offset;
++	u32			value;
++	struct au1000_gpio_chip	*gpch;
++	void __iomem		*gpdr;
++
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	gpdr = gpch->regbase + 0x0110;
++	
++	local_irq_save(flags);
++	value = readl(gpdr);
++	value |= mask;
++	writel(mask, gpdr);
++	local_irq_restore(flags);
+ 
+-static int au1xxx_gpio1_direction_output(unsigned gpio, int value)
+-{
+-	gpio1->trioutclr = (0x01 & gpio);
+-	au1xxx_gpio1_write(gpio, value);
+ 	return 0;
+ }
+ 
+-int au1xxx_gpio_get_value(unsigned gpio)
++/*
++ * Set GPIO bank 1 direction to output
++ */
++static int au1000_gpio1_direction_output(struct gpio_chip *chip,
++					unsigned offset, int value)
+ {
+-	if (gpio >= AU1XXX_GPIO_BASE)
+-#if defined(CONFIG_SOC_AU1000)
+-		return 0;
+-#else
+-		return au1xxx_gpio2_read(gpio);
+-#endif
++	unsigned long		flags;
++	u32			mask = 1 << offset;
++	u32			tmp;
++	struct au1000_gpio_chip	*gpch;
++	void __iomem 		*gpdr;
++
++	gpch = container_of(chip, struct au1000_gpio_chip, chip);
++	gpdr = gpch->regbase + 0x0100;
++	
++	local_irq_save(flags);
++	tmp = readl(gpdr);
++	writel(tmp, gpdr);
++	if (value)
++		writel(mask, gpch->regbase + 0x0108);
+ 	else
+-		return au1xxx_gpio1_read(gpio);
+-}
+-EXPORT_SYMBOL(au1xxx_gpio_get_value);
++		writel(mask, gpch->regbase + 0x0108);
++	local_irq_restore(flags);
+ 
+-void au1xxx_gpio_set_value(unsigned gpio, int value)
+-{
+-	if (gpio >= AU1XXX_GPIO_BASE)
+-#if defined(CONFIG_SOC_AU1000)
+-		;
+-#else
+-		au1xxx_gpio2_write(gpio, value);
+-#endif
+-	else
+-		au1xxx_gpio1_write(gpio, value);
++	return 0;
+ }
+-EXPORT_SYMBOL(au1xxx_gpio_set_value);
+ 
+-int au1xxx_gpio_direction_input(unsigned gpio)
+-{
+-	if (gpio >= AU1XXX_GPIO_BASE)
+-#if defined(CONFIG_SOC_AU1000)
+-		return -ENODEV;
+-#else
+-		return au1xxx_gpio2_direction_input(gpio);
++struct au1000_gpio_chip au1000_gpio_chip[] = {
++	[0] = {
++		.regbase			= (void __iomem *)SYS_BASE,
++		.chip = {
++			.label			= "au1000-gpio1",
++			.direction_input	= au1000_gpio1_direction_input,
++			.direction_output	= au1000_gpio1_direction_output,
++			.get			= au1000_gpio1_get,
++			.set			= au1000_gpio1_set,
++			.base			= 0,
++			.ngpio			= 32,
++		},
++	},
++#if !defined(CONFIG_SOC_AU1000)
++	[1] = {
++		.regbase			= (void __iomem *)GPIO2_BASE,
++		.chip = {
++			.label			= "au1000-gpio2",
++			.direction_input	= au1000_gpio2_direction_input,
++			.direction_output	= au1000_gpio2_direction_output,
++			.get			= au1000_gpio2_get,
++			.set			= au1000_gpio2_set,
++			.base			= AU1XXX_GPIO_BASE,
++			.ngpio			= 32,
++		},
++	},
+ #endif
++};
+ 
+-	return au1xxx_gpio1_direction_input(gpio);
+-}
+-EXPORT_SYMBOL(au1xxx_gpio_direction_input);
+-
+-int au1xxx_gpio_direction_output(unsigned gpio, int value)
++int __init au1000_gpio_init(void)
+ {
+-	if (gpio >= AU1XXX_GPIO_BASE)
+-#if defined(CONFIG_SOC_AU1000)
+-		return -ENODEV;
+-#else
+-		return au1xxx_gpio2_direction_output(gpio, value);
++	gpiochip_add(&au1000_gpio_chip[0].chip);
++#if !defined(CONFIG_SOC_AU1000)
++	gpiochip_add(&au1000_gpio_chip[1].chip);
+ #endif
+ 
+-	return au1xxx_gpio1_direction_output(gpio, value);
++	return 0;
+ }
+-EXPORT_SYMBOL(au1xxx_gpio_direction_output);
++arch_initcall(au1000_gpio_init);
+diff -urN linux-2.6.27.7/include/asm-mips/mach-au1x00/gpio.h linux-2.6.27.7.new/include/asm-mips/mach-au1x00/gpio.h
+--- linux-2.6.27.7/include/asm-mips/mach-au1x00/gpio.h	2008-11-21 00:02:37.000000000 +0100
++++ linux-2.6.27.7.new/include/asm-mips/mach-au1x00/gpio.h	2008-12-08 11:43:37.000000000 +0100
+@@ -1,69 +1,21 @@
+ #ifndef _AU1XXX_GPIO_H_
+ #define _AU1XXX_GPIO_H_
+ 
+-#include <linux/types.h>
+-
+ #define AU1XXX_GPIO_BASE	200
+ 
+-struct au1x00_gpio2 {
+-	u32	dir;
+-	u32	reserved;
+-	u32	output;
+-	u32	pinstate;
+-	u32	inten;
+-	u32	enable;
+-};
+-
+-extern int au1xxx_gpio_get_value(unsigned gpio);
+-extern void au1xxx_gpio_set_value(unsigned gpio, int value);
+-extern int au1xxx_gpio_direction_input(unsigned gpio);
+-extern int au1xxx_gpio_direction_output(unsigned gpio, int value);
+-
+-
+-/* Wrappers for the arch-neutral GPIO API */
+-
+-static inline int gpio_request(unsigned gpio, const char *label)
+-{
+-	/* Not yet implemented */
+-	return 0;
+-}
+-
+-static inline void gpio_free(unsigned gpio)
+-{
+-	/* Not yet implemented */
+-}
+-
+-static inline int gpio_direction_input(unsigned gpio)
+-{
+-	return au1xxx_gpio_direction_input(gpio);
+-}
+-
+-static inline int gpio_direction_output(unsigned gpio, int value)
+-{
+-	return au1xxx_gpio_direction_output(gpio, value);
+-}
+-
+-static inline int gpio_get_value(unsigned gpio)
+-{
+-	return au1xxx_gpio_get_value(gpio);
+-}
+-
+-static inline void gpio_set_value(unsigned gpio, int value)
+-{
+-	au1xxx_gpio_set_value(gpio, value);
+-}
+-
+-static inline int gpio_to_irq(unsigned gpio)
+-{
+-	return gpio;
+-}
+-
+-static inline int irq_to_gpio(unsigned irq)
+-{
+-	return irq;
+-}
++#define AU1000_GPIO2_DIR	0x00
++#define AU1000_GPIO2_RSVD	0x04
++#define AU1000_GPIO2_OUT	0x08
++#define AU1000_GPIO2_ST		0x0C
++#define AU1000_GPIO2_INT	0x10
++#define AU1000_GPIO2_EN		0x14
++
++#define gpio_get_value		__gpio_get_value
++#define gpio_set_value		__gpio_set_value
++
++#define gpio_to_irq(gpio)	NULL
++#define irq_to_gpio(irq)	NULL
+ 
+-/* For cansleep */
+ #include <asm-generic/gpio.h>
+ 
+ #endif /* _AU1XXX_GPIO_H_ */