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

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20418 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
blogic
2010-03-25 11:50:46 +00:00
parent c4a3b1979a
commit dd98c76b9a
7 changed files with 501 additions and 258 deletions
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196
target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch Normal file
View File

@@ -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");