add generic GPIO to MIPS boards, use it for au1000 and for the MTX-1 led driver as well

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7334 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 294 insertions, 0 deletions

diff --git a/target/linux/au1000-2.6/patches/001-au1x00_gpio.patch b/target/linux/au1000-2.6/patches/001-au1x00_gpio.patch
new file mode 100644
index 0000000000..d4339aec46
--- /dev/null
+++ b/target/linux/au1000-2.6/patches/001-au1x00_gpio.patch
@@ -0,0 +1,294 @@
+diff -urN linux-2.6.21.1/arch/mips/au1000/common/gpio.c linux-2.6.21.1.new/arch/mips/au1000/common/gpio.c
+--- linux-2.6.21.1/arch/mips/au1000/common/gpio.c	2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.new/arch/mips/au1000/common/gpio.c	2007-05-22 21:41:55.000000000 +0200
+@@ -1,4 +1,7 @@
+ /*
++ *  Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
++ *  	Architecture specific GPIO support
++ *
+  *  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
+@@ -18,101 +21,133 @@
+  *  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.,
+  *  675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ *  Notes :
++ * 	au1000 SoC have only one GPIO line : GPIO1
++ * 	others have a second one : GPIO2
+  */
++
++#include <linux/autoconf.h>
++#include <linux/init.h>
++#include <linux/types.h>
+ #include <linux/module.h>
+-#include <au1000.h>
+-#include <au1xxx_gpio.h>
++
++#include <asm/addrspace.h>
++#include <asm/io.h>
++
++#include <asm/mach-au1x00/au1000.h>
++#include <asm/gpio.h>
+ 
+ #define gpio1 sys
+ #if !defined(CONFIG_SOC_AU1000)
+ static AU1X00_GPIO2 * const gpio2 = (AU1X00_GPIO2 *)GPIO2_BASE;
++#define GPIO2_OUTPUT_ENABLE_MASK 	0x00010000
+ 
+-#define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
+-
+-int au1xxx_gpio2_read(int signal)
++static int au1xxx_gpio2_read(unsigned gpio)
+ {
+-	signal -= 200;
+-/*	gpio2->dir &= ~(0x01 << signal);						//Set GPIO to input */
+-	return ((gpio2->pinstate >> signal) & 0x01);
++	gpio -= AU1XXX_GPIO_BASE;
++	return ((gpio2->pinstate >> gpio) & 0x01);
+ }
+ 
+-void au1xxx_gpio2_write(int signal, int value)
++static void au1xxx_gpio2_write(unsigned gpio, int value)
+ {
+-	signal -= 200;
++	gpio -= AU1XXX_GPIO_BASE;
+ 
+-	gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << signal) |
+-		(value << signal);
++	gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) |
++	                (value << gpio);
+ }
+ 
+-void au1xxx_gpio2_tristate(int signal)
++static int au1xxx_gpio2_direction_input(unsigned gpio)
+ {
+-	signal -= 200;
+-	gpio2->dir &= ~(0x01 << signal); 	/* Set GPIO to input */
++	gpio -= AU1XXX_GPIO_BASE;
++	gpio2->dir &= ~(0x01 << gpio);
++	return 0;
+ }
+-#endif
+ 
+-int au1xxx_gpio1_read(int signal)
++static int au1xxx_gpio2_direction_output(unsigned gpio, int value)
++{
++	gpio -= AU1XXX_GPIO_BASE;
++	gpio2->dir = (0x01 << gpio) | (value << gpio);
++	return 0;
++}
++
++#endif /* !defined(CONFIG_SOC_AU1000) */
++
++static int au1xxx_gpio1_read(unsigned gpio)
+ {
+-/*	gpio1->trioutclr |= (0x01 << signal); */
+-	return ((gpio1->pinstaterd >> signal) & 0x01);
++	return ((gpio1->pinstaterd >> gpio) & 0x01);
+ }
+ 
+-void au1xxx_gpio1_write(int signal, int value)
++static void au1xxx_gpio1_write(unsigned gpio, int value)
+ {
+ 	if(value)
+-		gpio1->outputset = (0x01 << signal);
++		gpio1->outputset = (0x01 << gpio);
+ 	else
+-		gpio1->outputclr = (0x01 << signal);	/* Output a Zero */
++		/* Output a zero */
++		gpio1->outputclr = (0x01 << gpio);
+ }
+ 
+-void au1xxx_gpio1_tristate(int signal)
++static int au1xxx_gpio1_direction_input(unsigned gpio)
+ {
+-	gpio1->trioutclr = (0x01 << signal);		/* Tristate signal */
++	gpio1->pininputen = (0x01 << gpio);
++	return 0;
+ }
+ 
++static int au1xxx_gpio1_direction_output(unsigned gpio, int value)
++{
++	gpio1->trioutclr = (0x01 & gpio);
++	return 0;
++}
+ 
+-int au1xxx_gpio_read(int signal)
++int au1xxx_gpio_get_value(unsigned gpio)
+ {
+-	if(signal >= 200)
++	if(gpio >= AU1XXX_GPIO_BASE)
+ #if defined(CONFIG_SOC_AU1000)
+ 		return 0;
+ #else
+-		return au1xxx_gpio2_read(signal);
++		return au1xxx_gpio2_read(gpio);
+ #endif
+ 	else
+-		return au1xxx_gpio1_read(signal);
++		return au1xxx_gpio1_read(gpio);
+ }
+ 
+-void au1xxx_gpio_write(int signal, int value)
++void au1xxx_gpio_set_value(unsigned gpio, int value)
+ {
+-	if(signal >= 200)
++	if(gpio >= AU1XXX_GPIO_BASE)
+ #if defined(CONFIG_SOC_AU1000)
+ 		;
+ #else
+-		au1xxx_gpio2_write(signal, value);
++		au1xxx_gpio2_write(gpio, value);
+ #endif
+ 	else
+-		au1xxx_gpio1_write(signal, value);
++		au1xxx_gpio1_write(gpio, value);
+ }
+ 
+-void au1xxx_gpio_tristate(int signal)
++int au1xxx_gpio_direction_input(unsigned gpio)
+ {
+-	if(signal >= 200)
++	if (gpio >= AU1XXX_GPIO_BASE)
+ #if defined(CONFIG_SOC_AU1000)
+ 		;
+ #else
+-		au1xxx_gpio2_tristate(signal);
++		return au1xxx_gpio2_direction_input(gpio);
+ #endif
+ 	else
+-		au1xxx_gpio1_tristate(signal);
++		return au1xxx_gpio1_direction_input(gpio);
+ }
+ 
+-void au1xxx_gpio1_set_inputs(void)
++int au1xxx_gpio_direction_output(unsigned gpio, int value)
+ {
+-	gpio1->pininputen = 0;
++	if (gpio >= AU1XXX_GPIO_BASE)
++#if defined(CONFIG_SOC_AU1000)
++		;
++#else
++		return au1xxx_gpio2_direction_output(gpio, value);
++#endif
++	else
++		return au1xxx_gpio1_direction_output(gpio, value);
+ }
+ 
+-EXPORT_SYMBOL(au1xxx_gpio1_set_inputs);
+-EXPORT_SYMBOL(au1xxx_gpio_tristate);
+-EXPORT_SYMBOL(au1xxx_gpio_write);
+-EXPORT_SYMBOL(au1xxx_gpio_read);
++EXPORT_SYMBOL(au1xxx_gpio_direction_output);
++EXPORT_SYMBOL(au1xxx_gpio_direction_input);
++EXPORT_SYMBOL(au1xxx_gpio_get_value);
++EXPORT_SYMBOL(au1xxx_gpio_set_value);
+--- linux-2.6.21.1/arch/mips/Kconfig	2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.new/arch/mips/Kconfig	2007-05-21 08:04:42.000000000 +0200
+@@ -1044,6 +1044,7 @@
+ 	select SYS_SUPPORTS_32BIT_KERNEL
+ 	select SYS_SUPPORTS_APM_EMULATION
+ 	select SYS_SUPPORTS_KGDB
++	select GENERIC_GPIO
+ 
+ config PNX8550
+ 	bool
+diff -urN linux-2.6.21.1/include/asm-mips/mach-au1x00/au1xxx_gpio.h linux-2.6.21.1.new/include/asm-mips/mach-au1x00/au1xxx_gpio.h
+--- linux-2.6.21.1/include/asm-mips/mach-au1x00/au1xxx_gpio.h	2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.new/include/asm-mips/mach-au1x00/au1xxx_gpio.h	1970-01-01 01:00:00.000000000 +0100
+@@ -1,20 +0,0 @@
+-#ifndef __AU1XXX_GPIO_H
+-#define __AU1XXX_GPIO_H
+-
+-void au1xxx_gpio1_set_inputs(void);
+-void au1xxx_gpio_tristate(int signal);
+-void au1xxx_gpio_write(int signal, int value);
+-int  au1xxx_gpio_read(int signal);
+-
+-typedef volatile struct
+-{
+-	u32 dir;
+-	u32 reserved;
+-	u32 output;
+-	u32 pinstate;
+-	u32 inten;
+-	u32 enable;
+-
+-} AU1X00_GPIO2;
+-
+-#endif //__AU1XXX_GPIO_H
+diff -urN linux-2.6.21.1/include/asm-mips/mach-au1x00/gpio.h linux-2.6.21.1.new/include/asm-mips/mach-au1x00/gpio.h
+--- linux-2.6.21.1/include/asm-mips/mach-au1x00/gpio.h	1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.21.1.new/include/asm-mips/mach-au1x00/gpio.h	2007-05-21 01:10:22.000000000 +0200
+@@ -0,0 +1,69 @@
++#ifndef _AU1XXX_GPIO_H_
++#define _AU1XXX_GPIO_H_
++
++#define AU1XXX_GPIO_BASE	200
++
++typedef volatile struct
++{
++	u32 dir;
++	u32 reserved;
++	u32 output;
++	u32 pinstate;
++	u32 inten;
++	u32 enable;
++
++} AU1X00_GPIO2;
++
++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;
++}
++
++/* For cansleep */
++#include <asm-generic/gpio.h>
++
++#endif /* _AU1XXX_GPIO_H_ */