[rdc] use upstream MFD, GPIO patch, put everything in patches.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21219 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 288 insertions, 0 deletions

diff --git a/target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch b/target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch
new file mode 100644
index 0000000000..f2b96b32c2
--- /dev/null
+++ b/target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch
@@ -0,0 +1,288 @@
+This patch adds a new GPIO driver for the RDC321x SoC GPIO controller.
+
+Signed-off-by: Florian Fainelli <florian@openwrt.org>
+---
+Changes from v2:
+- initialize spinlock earlier
+- do not declare and assign gpch variables on the same line
+- use the pci_dev pointer passed as platform data
+- replaced rdc321x_pci_{read,write}
+
+Index: linux-2.6.30.10/drivers/gpio/Kconfig
+===================================================================
+--- linux-2.6.30.10.orig/drivers/gpio/Kconfig	2009-12-04 07:00:07.000000000 +0100
++++ linux-2.6.30.10/drivers/gpio/Kconfig	2010-04-28 10:16:52.000000000 +0200
+@@ -161,6 +161,14 @@
+ 
+ 	  If unsure, say N.
+ 
++config GPIO_RDC321X
++	tristate "RDC R-321x GPIO support"
++	depends on PCI && GPIOLIB
++	select MFD_RDC321X
++	help
++	  Support for the RDC R321x SoC GPIOs over southbridge
++	  PCI configuration space.
++
+ comment "SPI GPIO expanders:"
+ 
+ config GPIO_MAX7301
+Index: linux-2.6.30.10/drivers/gpio/Makefile
+===================================================================
+--- linux-2.6.30.10.orig/drivers/gpio/Makefile	2009-12-04 07:00:07.000000000 +0100
++++ linux-2.6.30.10/drivers/gpio/Makefile	2010-04-28 10:17:13.000000000 +0200
+@@ -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_RDC321X)	+= rdc321x-gpio.o
+Index: linux-2.6.30.10/drivers/gpio/rdc321x-gpio.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.10/drivers/gpio/rdc321x-gpio.c	2010-04-28 10:16:52.000000000 +0200
+@@ -0,0 +1,245 @@
++/*
++ * RDC321x GPIO driver
++ *
++ * Copyright (C) 2008, Volker Weiss <dev@tintuc.de>
++ * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
++ *
++ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ */
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/spinlock.h>
++#include <linux/platform_device.h>
++#include <linux/pci.h>
++#include <linux/gpio.h>
++#include <linux/mfd/rdc321x.h>
++
++struct rdc321x_gpio {
++	spinlock_t		lock;
++	struct pci_dev		*sb_pdev;
++	u32			data_reg[2];
++	int			reg1_ctrl_base;
++	int			reg1_data_base;
++	int			reg2_ctrl_base;
++	int			reg2_data_base;
++	struct gpio_chip	chip;
++};
++
++/* read GPIO pin */
++static int rdc_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
++{
++	struct rdc321x_gpio *gpch;
++	u32 value = 0;
++	int reg;
++
++	gpch = container_of(chip, struct rdc321x_gpio, chip);
++	reg = gpio < 32 ? gpch->reg1_data_base : gpch->reg2_data_base;
++
++	spin_lock(&gpch->lock);
++	pci_write_config_dword(gpch->sb_pdev, reg,
++					gpch->data_reg[gpio < 32 ? 0 : 1]);
++	pci_read_config_dword(gpch->sb_pdev, reg, &value);
++	spin_unlock(&gpch->lock);
++
++	return (1 << (gpio & 0x1f)) & value ? 1 : 0;
++}
++
++static void rdc_gpio_set_value_impl(struct gpio_chip *chip,
++				unsigned gpio, int value)
++{
++	struct rdc321x_gpio *gpch;
++	int reg = (gpio < 32) ? 0 : 1;
++
++	gpch = container_of(chip, struct rdc321x_gpio, chip);
++
++	if (value)
++		gpch->data_reg[reg] |= 1 << (gpio & 0x1f);
++	else
++		gpch->data_reg[reg] &= ~(1 << (gpio & 0x1f));
++
++	pci_write_config_dword(gpch->sb_pdev,
++			reg ? gpch->reg1_data_base : gpch->reg2_data_base,
++			gpch->data_reg[reg]);
++}
++
++/* set GPIO pin to value */
++static void rdc_gpio_set_value(struct gpio_chip *chip,
++				unsigned gpio, int value)
++{
++	struct rdc321x_gpio *gpch;
++
++	gpch = container_of(chip, struct rdc321x_gpio, chip);
++	spin_lock(&gpch->lock);
++	rdc_gpio_set_value_impl(chip, gpio, value);
++	spin_unlock(&gpch->lock);
++}
++
++static int rdc_gpio_config(struct gpio_chip *chip,
++				unsigned gpio, int value)
++{
++	struct rdc321x_gpio *gpch;
++	int err;
++	u32 reg;
++
++	gpch = container_of(chip, struct rdc321x_gpio, chip);
++
++	spin_lock(&gpch->lock);
++	err = pci_read_config_dword(gpch->sb_pdev, gpio < 32 ?
++			gpch->reg1_ctrl_base : gpch->reg2_ctrl_base, &reg);
++	if (err)
++		goto unlock;
++
++	reg |= 1 << (gpio & 0x1f);
++
++	err = pci_write_config_dword(gpch->sb_pdev, gpio < 32 ?
++			gpch->reg1_ctrl_base : gpch->reg2_ctrl_base, reg);
++	if (err)
++		goto unlock;
++
++	rdc_gpio_set_value_impl(chip, gpio, value);
++
++unlock:
++	spin_unlock(&gpch->lock);
++
++	return err;
++}
++
++/* configure GPIO pin as input */
++static int rdc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
++{
++	return rdc_gpio_config(chip, gpio, 1);
++}
++
++/*
++ * Cache the initial value of both GPIO data registers
++ */
++static int __devinit rdc321x_gpio_probe(struct platform_device *pdev)
++{
++	int err;
++	struct resource *r;
++	struct rdc321x_gpio *rdc321x_gpio_dev;
++	struct rdc321x_gpio_pdata *pdata;
++
++	pdata = pdev->dev.platform_data;
++	if (!pdata) {
++		dev_err(&pdev->dev, "no platform data supplied\n");
++		return -ENODEV;
++	}
++
++	rdc321x_gpio_dev = kzalloc(sizeof(struct rdc321x_gpio), GFP_KERNEL);
++	if (!rdc321x_gpio_dev) {
++		dev_err(&pdev->dev, "failed to allocate private data\n");
++		return -ENOMEM;
++	}
++
++	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gpio-reg1");
++	if (!r) {
++		dev_err(&pdev->dev, "failed to get gpio-reg1 resource\n");
++		err = -ENODEV;
++		goto out_free;
++	}
++
++	spin_lock_init(&rdc321x_gpio_dev->lock);
++	rdc321x_gpio_dev->sb_pdev = pdata->sb_pdev;
++	rdc321x_gpio_dev->reg1_ctrl_base = r->start;
++	rdc321x_gpio_dev->reg1_data_base = r->start + 0x4;
++
++	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gpio-reg2");
++	if (!r) {
++		dev_err(&pdev->dev, "failed to get gpio-reg2 resource\n");
++		err = -ENODEV;
++		goto out_free;
++	}
++
++	rdc321x_gpio_dev->reg2_ctrl_base = r->start;
++	rdc321x_gpio_dev->reg2_data_base = r->start + 0x4;
++
++	rdc321x_gpio_dev->chip.label = "rdc321x-gpio";
++	rdc321x_gpio_dev->chip.direction_input = rdc_gpio_direction_input;
++	rdc321x_gpio_dev->chip.direction_output = rdc_gpio_config;
++	rdc321x_gpio_dev->chip.get = rdc_gpio_get_value;
++	rdc321x_gpio_dev->chip.set = rdc_gpio_set_value;
++	rdc321x_gpio_dev->chip.base = 0;
++	rdc321x_gpio_dev->chip.ngpio = pdata->max_gpios;
++
++	platform_set_drvdata(pdev, rdc321x_gpio_dev);
++
++	/* This might not be, what others (BIOS, bootloader, etc.)
++	   wrote to these registers before, but it's a good guess. Still
++	   better than just using 0xffffffff. */
++	err = pci_read_config_dword(rdc321x_gpio_dev->sb_pdev,
++					rdc321x_gpio_dev->reg1_data_base,
++					&rdc321x_gpio_dev->data_reg[0]);
++	if (err)
++		goto out_drvdata;
++
++	err = pci_read_config_dword(rdc321x_gpio_dev->sb_pdev,
++					rdc321x_gpio_dev->reg2_data_base,
++					&rdc321x_gpio_dev->data_reg[1]);
++	if (err)
++		goto out_drvdata;
++
++	dev_info(&pdev->dev, "registering %d GPIOs\n",
++					rdc321x_gpio_dev->chip.ngpio);
++	return gpiochip_add(&rdc321x_gpio_dev->chip);
++
++out_drvdata:
++	platform_set_drvdata(pdev, NULL);
++out_free:
++	kfree(rdc321x_gpio_dev);
++	return err;
++}
++
++static int __devexit rdc321x_gpio_remove(struct platform_device *pdev)
++{
++	int ret;
++	struct rdc321x_gpio *rdc321x_gpio_dev = platform_get_drvdata(pdev);
++
++	ret = gpiochip_remove(&rdc321x_gpio_dev->chip);
++	if (ret)
++		dev_err(&pdev->dev, "failed to unregister chip\n");
++
++	kfree(rdc321x_gpio_dev);
++	platform_set_drvdata(pdev, NULL);
++
++	return ret;
++}
++
++static struct platform_driver rdc321x_gpio_driver = {
++	.driver.name	= "rdc321x-gpio",
++	.driver.owner	= THIS_MODULE,
++	.probe		= rdc321x_gpio_probe,
++	.remove		= __devexit_p(rdc321x_gpio_remove),
++};
++
++static int __init rdc321x_gpio_init(void)
++{
++	return platform_driver_register(&rdc321x_gpio_driver);
++}
++
++static void __exit rdc321x_gpio_exit(void)
++{
++	platform_driver_unregister(&rdc321x_gpio_driver);
++}
++
++module_init(rdc321x_gpio_init);
++module_exit(rdc321x_gpio_exit);
++
++MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
++MODULE_DESCRIPTION("RDC321x GPIO driver");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS("platform:rdc321x-gpio");