[ifxmips] implement gpiolib drivers for core gpio and ebu attached latches

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20418 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 196 insertions, 0 deletions

diff --git a/target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch b/target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch
new file mode 100644
index 000000000..01e428a18
--- /dev/null
+++ b/target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch
@@ -0,0 +1,196 @@
+Index: linux-2.6.30.10/drivers/gpio/Kconfig
+===================================================================
+--- linux-2.6.30.10.orig/drivers/gpio/Kconfig	2010-03-24 21:55:56.000000000 +0100
++++ linux-2.6.30.10/drivers/gpio/Kconfig	2010-03-24 21:56:36.000000000 +0100
+@@ -176,4 +176,12 @@
+ 	  SPI driver for Microchip MCP23S08 I/O expander.  This provides
+ 	  a GPIO interface supporting inputs and outputs.
+ 
++comment "EBU GPIO expanders:"
++
++config GPIO_IFXMIPS_EBU
++	boolean "IFXMIPS EBU attached I/O expander"
++	depends on IFXMIPS
++	help
++	  This driver allows you to drive latches attached to the SoCc External Bus Unit
++
+ endif
+Index: linux-2.6.30.10/drivers/gpio/Makefile
+===================================================================
+--- linux-2.6.30.10.orig/drivers/gpio/Makefile	2010-03-24 21:55:56.000000000 +0100
++++ linux-2.6.30.10/drivers/gpio/Makefile	2010-03-24 21:56:36.000000000 +0100
+@@ -12,3 +12,4 @@
+ obj-$(CONFIG_GPIO_TWL4030)	+= twl4030-gpio.o
+ obj-$(CONFIG_GPIO_XILINX)	+= xilinx_gpio.o
+ obj-$(CONFIG_GPIO_BT8XX)	+= bt8xxgpio.o
++obj-$(CONFIG_GPIO_IFXMIPS_EBU)	+= ifxmips_ebu_gpio.o
+Index: linux-2.6.30.10/arch/mips/ifxmips/board.c
+===================================================================
+--- linux-2.6.30.10.orig/arch/mips/ifxmips/board.c	2010-03-25 10:43:06.000000000 +0100
++++ linux-2.6.30.10/arch/mips/ifxmips/board.c	2010-03-25 12:40:54.000000000 +0100
+@@ -111,6 +111,11 @@
+ 	.name = "ifxmips_wdt",
+ };
+ 
++static struct platform_device ifxmips_ebu = {
++	.id = 0,
++	.name = "ifxmips_ebu",
++};
++
+ static struct resource ifxmips_mtd_resource = {
+ 	.start  = IFXMIPS_FLASH_START,
+ 	.end    = IFXMIPS_FLASH_START + IFXMIPS_FLASH_MAX - 1,
+@@ -145,10 +150,18 @@
+ static struct gpio_led arv452_gpio_leds[] = {
+ 	{ .name = "ifx:blue:power", .gpio = 3, .active_low = 1, },
+ 	{ .name = "ifx:blue:adsl", .gpio = 4, .active_low = 1, },
+-	{ .name = "ifx:pink:internet", .gpio = 5, .active_low = 1, },
++	{ .name = "ifx:blue:internet", .gpio = 5, .active_low = 1, },
+ 	{ .name = "ifx:red:power", .gpio = 6, .active_low = 1, },
+ 	{ .name = "ifx:yello:wps", .gpio = 7, .active_low = 1, },
+ 	{ .name = "ifx:red:wps", .gpio = 9, .active_low = 1, },
++	{ .name = "ifx:blue:voip", .gpio = 32, .active_low = 1, },
++	{ .name = "ifx:blue:fxs1", .gpio = 33, .active_low = 1, },
++	{ .name = "ifx:blue:fxs2", .gpio = 34, .active_low = 1, },
++	{ .name = "ifx:blue:fxo", .gpio = 35, .active_low = 1, },
++	{ .name = "ifx:blue:voice", .gpio = 36, .active_low = 1, },
++	{ .name = "ifx:blue:usb", .gpio = 37, .active_low = 1, },
++	{ .name = "ifx:blue:wlan", .gpio = 38, .active_low = 1, },
++	{ .name = "ifx:red:internet", .gpio = 41, .active_low = 1, },
+ };
+ 
+ static struct gpio_led_platform_data ifxmips_gpio_led_data;
+@@ -205,6 +218,7 @@
+ struct platform_device *arv452_devs[] = {
+ 	&ifxmips_gpio, &ifxmips_mii, &ifxmips_mtd,
+ 	&ifxmips_gpio_dev, &ifxmips_wdt, &dwc_usb,
++	&ifxmips_ebu,
+ #ifdef CONFIG_LEDS_GPIO
+ 	&ifxmips_gpio_leds,
+ #endif
+Index: linux-2.6.30.10/drivers/gpio/ifxmips_ebu_gpio.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.10/drivers/gpio/ifxmips_ebu_gpio.c	2010-03-25 12:47:07.000000000 +0100
+@@ -0,0 +1,121 @@
++/*
++ *   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.
++ *
++ *   Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/init.h>
++#include <linux/platform_device.h>
++#include <linux/mutex.h>
++#include <linux/gpio.h>
++#include <ifxmips.h>
++
++#define IFXMIPS_EBU_START	0x14000000
++#define IFXMIPS_EBU_MAX		0x00001000
++#define IFXMIPS_EBU_BUSCON	0x1e7ff
++#define IFXMIPS_EBU_WP		0x80000000
++
++static int shadow = (1 << 10) | (1 << 8);
++static void __iomem *virt;
++
++static int
++ifxmips_ebu_direction_input(struct gpio_chip *chip, unsigned offset)
++{
++	return -EINVAL;
++}
++
++static int
++ifxmips_ebu_direction_output(struct gpio_chip *chip, unsigned offset, int value)
++{
++	return 0;
++}
++
++static int
++ifxmips_ebu_get(struct gpio_chip *chip, unsigned offset)
++{
++	return -EINVAL;
++}
++
++static void
++ifxmips_ebu_set(struct gpio_chip *chip, unsigned offset, int value)
++{
++	if(value)
++		shadow |= (1 << offset);
++	else
++		shadow &= ~(1 << offset);
++	ifxmips_w32(IFXMIPS_EBU_BUSCON, IFXMIPS_EBU_BUSCON1);
++	*((__u16*)virt) = shadow;
++	ifxmips_w32(IFXMIPS_EBU_BUSCON | IFXMIPS_EBU_WP, IFXMIPS_EBU_BUSCON1);
++}
++
++static struct gpio_chip
++ifxmips_ebu_chip =
++{
++	.label = "ifxmips_ebu",
++	.direction_input = ifxmips_ebu_direction_input,
++	.direction_output = ifxmips_ebu_direction_output,
++	.set = ifxmips_ebu_set,
++	.get = ifxmips_ebu_get,
++	.base = 32,
++	.ngpio = 16,
++	.can_sleep = 1,
++	.owner = THIS_MODULE,
++};
++
++static int __devinit
++ifxmips_ebu_probe(struct platform_device *dev)
++{
++	ifxmips_w32(IFXMIPS_EBU_START | 0x1, IFXMIPS_EBU_ADDRSEL1);
++	ifxmips_w32(IFXMIPS_EBU_BUSCON | IFXMIPS_EBU_WP, IFXMIPS_EBU_BUSCON1);
++	virt = ioremap_nocache(IFXMIPS_EBU_START, IFXMIPS_EBU_MAX);
++	if(gpiochip_add(&ifxmips_ebu_chip))
++		return -EINVAL;
++	return 0;
++}
++
++static int
++ifxmips_ebu_remove(struct platform_device *dev)
++{
++	return gpiochip_remove(&ifxmips_ebu_chip);
++}
++
++static struct platform_driver
++ifxmips_ebu_driver = {
++	.probe = ifxmips_ebu_probe,
++	.remove = ifxmips_ebu_remove,
++	.driver = {
++		.name = "ifxmips_ebu",
++		.owner = THIS_MODULE,
++	},
++};
++
++static int __init
++ifxmips_ebu_init(void)
++{
++	return platform_driver_register(&ifxmips_ebu_driver);
++}
++
++static void __exit
++ifxmips_ebu_exit(void)
++{
++	platform_driver_unregister(&ifxmips_ebu_driver);
++}
++
++module_init(ifxmips_ebu_init);
++module_exit(ifxmips_ebu_exit);
++
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("ifxmips - EBU Latch GPIO-Expander");