1 files changed, 0 insertions, 421 deletions
diff --git a/target/linux/ixp4xx/patches-2.6.33/020-gateworks_i2c_pld.patch b/target/linux/ixp4xx/patches-2.6.33/020-gateworks_i2c_pld.patch
deleted file mode 100644
index b51e26dfa4..0000000000
--- a/target/linux/ixp4xx/patches-2.6.33/020-gateworks_i2c_pld.patch
+++ /dev/null
@@ -1,421 +0,0 @@
---- /dev/null
-+++ b/drivers/gpio/gw_i2c_pld.c
-@@ -0,0 +1,371 @@
-+/*
-+ * Gateworks I2C PLD GPIO expander
-+ *
-+ * Copyright (C) 2009 Gateworks Corporation
-+ *
-+ * 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/kernel.h>
-+#include <linux/slab.h>
-+#include <linux/hardirq.h>
-+#include <linux/i2c.h>
-+#include <linux/i2c/gw_i2c_pld.h>
-+#include <asm/gpio.h>
-+
-+static const struct i2c_device_id gw_i2c_pld_id[] = {
-+	{ "gw_i2c_pld", 8 },
-+	{ }
-+};
-+MODULE_DEVICE_TABLE(i2c, gw_i2c_pld_id);
-+
-+/*
-+ * The Gateworks I2C PLD chip only expose one read and one
-+ * write register.  Writing a "one" bit (to match the reset state) lets
-+ * that pin be used as an input. It is an open-drain model.
-+ */
-+
-+struct gw_i2c_pld {
-+	struct gpio_chip	chip;
-+	struct i2c_client	*client;
-+	unsigned		out;		/* software latch */
-+};
-+
-+/*-------------------------------------------------------------------------*/
-+
-+/*
-+ * The Gateworks I2C PLD chip does not properly send the acknowledge bit
-+ * thus we cannot use standard i2c_smbus functions. We have recreated
-+ * our own here, but we still use the mutex_lock to lock the i2c_bus
-+ * as the device still exists on the I2C bus.
-+*/
-+
-+#define PLD_SCL_GPIO 6
-+#define PLD_SDA_GPIO 7
-+
-+#define SCL_LO()  gpio_line_set(PLD_SCL_GPIO, IXP4XX_GPIO_LOW)
-+#define SCL_HI()  gpio_line_set(PLD_SCL_GPIO, IXP4XX_GPIO_HIGH)
-+#define SCL_EN()  gpio_line_config(PLD_SCL_GPIO, IXP4XX_GPIO_OUT)
-+#define SDA_LO()  gpio_line_set(PLD_SDA_GPIO, IXP4XX_GPIO_LOW)
-+#define SDA_HI()  gpio_line_set(PLD_SDA_GPIO, IXP4XX_GPIO_HIGH)
-+#define SDA_EN()  gpio_line_config(PLD_SDA_GPIO, IXP4XX_GPIO_OUT)
-+#define SDA_DIS() gpio_line_config(PLD_SDA_GPIO, IXP4XX_GPIO_IN)
-+#define SDA_IN(x) gpio_line_get(PLD_SDA_GPIO, &x);
-+
-+static int i2c_pld_write_byte(int address, int byte)
-+{
-+	int i;
-+
-+	address = (address << 1) & ~0x1;
-+
-+	SDA_HI();
-+	SDA_EN();
-+	SCL_EN();
-+	SCL_HI();
-+	SDA_LO();
-+	SCL_LO();
-+
-+	for (i = 7; i >= 0; i--)
-+	{
-+		if (address & (1 << i))
-+			SDA_HI();
-+		else
-+			SDA_LO();
-+
-+		SCL_HI();
-+		SCL_LO();
-+	}
-+
-+	SDA_DIS();
-+	SCL_HI();
-+	SDA_IN(i);
-+	SCL_LO();
-+	SDA_EN();
-+
-+	for (i = 7; i >= 0; i--)
-+	{
-+		if (byte & (1 << i))
-+      SDA_HI();
-+		else
-+			SDA_LO();
-+		SCL_HI();
-+		SCL_LO();
-+	}
-+
-+	SDA_DIS();
-+	SCL_HI();
-+	SDA_IN(i);
-+	SCL_LO();
-+
-+	SDA_HI();
-+	SDA_EN();
-+
-+	SDA_LO();
-+	SCL_HI();
-+	SDA_HI();
-+	SCL_LO();
-+	SCL_HI();
-+
-+	return 0;
-+}
-+
-+static unsigned int i2c_pld_read_byte(int address)
-+{
-+	int i = 0, byte = 0;
-+	int bit;
-+
-+	address = (address << 1) | 0x1;
-+
-+	SDA_HI();
-+	SDA_EN();
-+	SCL_EN();
-+	SCL_HI();
-+	SDA_LO();
-+	SCL_LO();
-+
-+	for (i = 7; i >= 0; i--)
-+	{
-+		if (address & (1 << i))
-+			SDA_HI();
-+		else
-+			SDA_LO();
-+
-+		SCL_HI();
-+		SCL_LO();
-+	}
-+
-+	SDA_DIS();
-+	SCL_HI();
-+	SDA_IN(i);
-+	SCL_LO();
-+	SDA_EN();
-+
-+	SDA_DIS();
-+	for (i = 7; i >= 0; i--)
-+	{
-+		SCL_HI();
-+		SDA_IN(bit);
-+		byte |= bit << i;
-+		SCL_LO();
-+	}
-+
-+	SDA_LO();
-+	SCL_HI();
-+	SDA_HI();
-+	SCL_LO();
-+	SCL_HI();
-+
-+	return byte;
-+}
-+
-+
-+static int gw_i2c_pld_input8(struct gpio_chip *chip, unsigned offset)
-+{
-+	int ret;
-+	struct gw_i2c_pld *gpio = container_of(chip, struct gw_i2c_pld, chip);
-+	struct i2c_adapter *adap = gpio->client->adapter;
-+	
-+	if (in_atomic() || irqs_disabled()) {
-+		ret = mutex_trylock(&adap->bus_lock);
-+		if (!ret)
-+			/* I2C activity is ongoing. */
-+			return -EAGAIN;
-+	} else {
-+		mutex_lock_nested(&adap->bus_lock, adap->level);
-+	}
-+
-+	gpio->out |= (1 << offset);
-+
-+	ret = i2c_pld_write_byte(gpio->client->addr, gpio->out);
-+
-+	mutex_unlock(&adap->bus_lock);
-+
-+	return ret;
-+}
-+
-+static int gw_i2c_pld_get8(struct gpio_chip *chip, unsigned offset)
-+{
-+	int ret;
-+	s32	value;
-+	struct gw_i2c_pld *gpio = container_of(chip, struct gw_i2c_pld, chip);
-+	struct i2c_adapter *adap = gpio->client->adapter;
-+	
-+	if (in_atomic() || irqs_disabled()) {
-+		ret = mutex_trylock(&adap->bus_lock);
-+		if (!ret)
-+			/* I2C activity is ongoing. */
-+			return -EAGAIN;
-+	} else {
-+		mutex_lock_nested(&adap->bus_lock, adap->level);
-+	}
-+
-+	value = i2c_pld_read_byte(gpio->client->addr);
-+
-+	mutex_unlock(&adap->bus_lock);
-+
-+	return (value < 0) ? 0 : (value & (1 << offset));
-+}
-+
-+static int gw_i2c_pld_output8(struct gpio_chip *chip, unsigned offset, int value)
-+{
-+	int ret;
-+
-+	struct gw_i2c_pld *gpio = container_of(chip, struct gw_i2c_pld, chip);
-+	struct i2c_adapter *adap = gpio->client->adapter;
-+
-+	unsigned bit = 1 << offset;
-+	
-+	if (in_atomic() || irqs_disabled()) {
-+		ret = mutex_trylock(&adap->bus_lock);
-+		if (!ret)
-+			/* I2C activity is ongoing. */
-+			return -EAGAIN;
-+	} else {
-+		mutex_lock_nested(&adap->bus_lock, adap->level);
-+	}
-+
-+
-+	if (value)
-+		gpio->out |= bit;
-+	else
-+		gpio->out &= ~bit;
-+
-+	ret = i2c_pld_write_byte(gpio->client->addr, gpio->out);
-+
-+	mutex_unlock(&adap->bus_lock);
-+
-+	return ret;
-+}
-+
-+static void gw_i2c_pld_set8(struct gpio_chip *chip, unsigned offset, int value)
-+{
-+	gw_i2c_pld_output8(chip, offset, value);
-+}
-+
-+/*-------------------------------------------------------------------------*/
-+
-+static int gw_i2c_pld_probe(struct i2c_client *client,
-+			 const struct i2c_device_id *id)
-+{
-+	struct gw_i2c_pld_platform_data	*pdata;
-+	struct gw_i2c_pld *gpio;
-+	int status;
-+
-+	pdata = client->dev.platform_data;
-+	if (!pdata)
-+		return -ENODEV;
-+
-+	/* Allocate, initialize, and register this gpio_chip. */
-+	gpio = kzalloc(sizeof *gpio, GFP_KERNEL);
-+	if (!gpio)
-+		return -ENOMEM;
-+
-+	gpio->chip.base = pdata->gpio_base;
-+	gpio->chip.can_sleep = 1;
-+	gpio->chip.dev = &client->dev;
-+	gpio->chip.owner = THIS_MODULE;
-+
-+	gpio->chip.ngpio = pdata->nr_gpio;
-+	gpio->chip.direction_input = gw_i2c_pld_input8;
-+	gpio->chip.get = gw_i2c_pld_get8;
-+	gpio->chip.direction_output = gw_i2c_pld_output8;
-+	gpio->chip.set = gw_i2c_pld_set8;
-+
-+	gpio->chip.label = client->name;
-+
-+	gpio->client = client;
-+	i2c_set_clientdata(client, gpio);
-+
-+	gpio->out = 0xFF;
-+
-+	status = gpiochip_add(&gpio->chip);
-+	if (status < 0)
-+		goto fail;
-+
-+	dev_info(&client->dev, "gpios %d..%d on a %s%s\n",
-+			gpio->chip.base,
-+			gpio->chip.base + gpio->chip.ngpio - 1,
-+			client->name,
-+			client->irq ? " (irq ignored)" : "");
-+
-+	/* Let platform code set up the GPIOs and their users.
-+	 * Now is the first time anyone could use them.
-+	 */
-+	if (pdata->setup) {
-+		status = pdata->setup(client,
-+				gpio->chip.base, gpio->chip.ngpio,
-+				pdata->context);
-+		if (status < 0)
-+			dev_warn(&client->dev, "setup --> %d\n", status);
-+	}
-+
-+	return 0;
-+
-+fail:
-+	dev_dbg(&client->dev, "probe error %d for '%s'\n",
-+			status, client->name);
-+	kfree(gpio);
-+	return status;
-+}
-+
-+static int gw_i2c_pld_remove(struct i2c_client *client)
-+{
-+	struct gw_i2c_pld_platform_data	*pdata = client->dev.platform_data;
-+	struct gw_i2c_pld *gpio = i2c_get_clientdata(client);
-+	int				status = 0;
-+
-+	if (pdata->teardown) {
-+		status = pdata->teardown(client,
-+				gpio->chip.base, gpio->chip.ngpio,
-+				pdata->context);
-+		if (status < 0) {
-+			dev_err(&client->dev, "%s --> %d\n",
-+					"teardown", status);
-+			return status;
-+		}
-+	}
-+
-+	status = gpiochip_remove(&gpio->chip);
-+	if (status == 0)
-+		kfree(gpio);
-+	else
-+		dev_err(&client->dev, "%s --> %d\n", "remove", status);
-+	return status;
-+}
-+
-+static struct i2c_driver gw_i2c_pld_driver = {
-+	.driver = {
-+		.name	= "gw_i2c_pld",
-+		.owner	= THIS_MODULE,
-+	},
-+	.probe	= gw_i2c_pld_probe,
-+	.remove	= gw_i2c_pld_remove,
-+	.id_table = gw_i2c_pld_id,
-+};
-+
-+static int __init gw_i2c_pld_init(void)
-+{
-+	return i2c_add_driver(&gw_i2c_pld_driver);
-+}
-+module_init(gw_i2c_pld_init);
-+
-+static void __exit gw_i2c_pld_exit(void)
-+{
-+	i2c_del_driver(&gw_i2c_pld_driver);
-+}
-+module_exit(gw_i2c_pld_exit);
-+
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("Chris Lang");
---- a/drivers/gpio/Kconfig
-+++ b/drivers/gpio/Kconfig
-@@ -221,6 +221,14 @@ config GPIO_TIMBERDALE
- 	---help---
- 	Add support for the GPIO IP in the timberdale FPGA.
- 
-+config GPIO_GW_I2C_PLD
-+	tristate "Gateworks I2C PLD GPIO Expander"
-+	depends on I2C
-+	help
-+		Say yes here to provide access to the Gateworks I2C PLD GPIO
-+		Expander. This is used at least on the GW2358-4.
-+
-+
- comment "SPI GPIO expanders:"
- 
- config GPIO_MAX7301
---- a/drivers/gpio/Makefile
-+++ b/drivers/gpio/Makefile
-@@ -22,3 +22,4 @@ obj-$(CONFIG_GPIO_CS5535)	+= cs5535-gpio
- obj-$(CONFIG_GPIO_BT8XX)	+= bt8xxgpio.o
- obj-$(CONFIG_GPIO_VR41XX)	+= vr41xx_giu.o
- obj-$(CONFIG_GPIO_WM831X)	+= wm831x-gpio.o
-+obj-$(CONFIG_GPIO_GW_I2C_PLD)	+= gw_i2c_pld.o
---- /dev/null
-+++ b/include/linux/i2c/gw_i2c_pld.h
-@@ -0,0 +1,20 @@
-+#ifndef __LINUX_GW_I2C_PLD_H
-+#define __LINUX_GW_I2C_PLD_H
-+
-+/**
-+ * The Gateworks I2C PLD Implements an additional 8 bits of GPIO through the PLD
-+ */
-+
-+struct gw_i2c_pld_platform_data {
-+	unsigned gpio_base;
-+	unsigned nr_gpio;
-+	int		(*setup)(struct i2c_client *client,
-+					int gpio, unsigned ngpio,
-+					void *context);
-+	int		(*teardown)(struct i2c_client *client,
-+					int gpio, unsigned ngpio,
-+					void *context);
-+	void		*context;
-+};
-+
-+#endif /* __LINUX_GW_I2C_PLD_H */