1 files changed, 0 insertions, 257 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-nforce2-s4985.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-nforce2-s4985.c
deleted file mode 100644
index 29015eb9..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-nforce2-s4985.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/*
- * i2c-nforce2-s4985.c - i2c-nforce2 extras for the Tyan S4985 motherboard
- *
- * Copyright (C) 2008 Jean Delvare <khali@linux-fr.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.
- */
-
-/*
- * We select the channels by sending commands to the Philips
- * PCA9556 chip at I2C address 0x18. The main adapter is used for
- * the non-multiplexed part of the bus, and 4 virtual adapters
- * are defined for the multiplexed addresses: 0x50-0x53 (memory
- * module EEPROM) located on channels 1-4. We define one virtual
- * adapter per CPU, which corresponds to one multiplexed channel:
- *   CPU0: virtual adapter 1, channel 1
- *   CPU1: virtual adapter 2, channel 2
- *   CPU2: virtual adapter 3, channel 3
- *   CPU3: virtual adapter 4, channel 4
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-
-extern struct i2c_adapter *nforce2_smbus;
-
-static struct i2c_adapter *s4985_adapter;
-static struct i2c_algorithm *s4985_algo;
-
-/* Wrapper access functions for multiplexed SMBus */
-static DEFINE_MUTEX(nforce2_lock);
-
-static s32 nforce2_access_virt0(struct i2c_adapter *adap, u16 addr,
-				unsigned short flags, char read_write,
-				u8 command, int size,
-				union i2c_smbus_data *data)
-{
-	int error;
-
-	/* We exclude the multiplexed addresses */
-	if ((addr & 0xfc) == 0x50 || (addr & 0xfc) == 0x30
-	 || addr == 0x18)
-		return -ENXIO;
-
-	mutex_lock(&nforce2_lock);
-	error = nforce2_smbus->algo->smbus_xfer(adap, addr, flags, read_write,
-						command, size, data);
-	mutex_unlock(&nforce2_lock);
-
-	return error;
-}
-
-/* We remember the last used channels combination so as to only switch
-   channels when it is really needed. This greatly reduces the SMBus
-   overhead, but also assumes that nobody will be writing to the PCA9556
-   in our back. */
-static u8 last_channels;
-
-static inline s32 nforce2_access_channel(struct i2c_adapter *adap, u16 addr,
-					 unsigned short flags, char read_write,
-					 u8 command, int size,
-					 union i2c_smbus_data *data,
-					 u8 channels)
-{
-	int error;
-
-	/* We exclude the non-multiplexed addresses */
-	if ((addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30)
-		return -ENXIO;
-
-	mutex_lock(&nforce2_lock);
-	if (last_channels != channels) {
-		union i2c_smbus_data mplxdata;
-		mplxdata.byte = channels;
-
-		error = nforce2_smbus->algo->smbus_xfer(adap, 0x18, 0,
-							I2C_SMBUS_WRITE, 0x01,
-							I2C_SMBUS_BYTE_DATA,
-							&mplxdata);
-		if (error)
-			goto UNLOCK;
-		last_channels = channels;
-	}
-	error = nforce2_smbus->algo->smbus_xfer(adap, addr, flags, read_write,
-						command, size, data);
-
-UNLOCK:
-	mutex_unlock(&nforce2_lock);
-	return error;
-}
-
-static s32 nforce2_access_virt1(struct i2c_adapter *adap, u16 addr,
-				unsigned short flags, char read_write,
-				u8 command, int size,
-				union i2c_smbus_data *data)
-{
-	/* CPU0: channel 1 enabled */
-	return nforce2_access_channel(adap, addr, flags, read_write, command,
-				      size, data, 0x02);
-}
-
-static s32 nforce2_access_virt2(struct i2c_adapter *adap, u16 addr,
-				unsigned short flags, char read_write,
-				u8 command, int size,
-				union i2c_smbus_data *data)
-{
-	/* CPU1: channel 2 enabled */
-	return nforce2_access_channel(adap, addr, flags, read_write, command,
-				      size, data, 0x04);
-}
-
-static s32 nforce2_access_virt3(struct i2c_adapter *adap, u16 addr,
-				unsigned short flags, char read_write,
-				u8 command, int size,
-				union i2c_smbus_data *data)
-{
-	/* CPU2: channel 3 enabled */
-	return nforce2_access_channel(adap, addr, flags, read_write, command,
-				      size, data, 0x08);
-}
-
-static s32 nforce2_access_virt4(struct i2c_adapter *adap, u16 addr,
-				unsigned short flags, char read_write,
-				u8 command, int size,
-				union i2c_smbus_data *data)
-{
-	/* CPU3: channel 4 enabled */
-	return nforce2_access_channel(adap, addr, flags, read_write, command,
-				      size, data, 0x10);
-}
-
-static int __init nforce2_s4985_init(void)
-{
-	int i, error;
-	union i2c_smbus_data ioconfig;
-
-	if (!nforce2_smbus)
-		return -ENODEV;
-
-	/* Configure the PCA9556 multiplexer */
-	ioconfig.byte = 0x00; /* All I/O to output mode */
-	error = i2c_smbus_xfer(nforce2_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03,
-			       I2C_SMBUS_BYTE_DATA, &ioconfig);
-	if (error) {
-		dev_err(&nforce2_smbus->dev, "PCA9556 configuration failed\n");
-		error = -EIO;
-		goto ERROR0;
-	}
-
-	/* Unregister physical bus */
-	error = i2c_del_adapter(nforce2_smbus);
-	if (error) {
-		dev_err(&nforce2_smbus->dev, "Physical bus removal failed\n");
-		goto ERROR0;
-	}
-
-	printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4985\n");
-	/* Define the 5 virtual adapters and algorithms structures */
-	s4985_adapter = kzalloc(5 * sizeof(struct i2c_adapter), GFP_KERNEL);
-	if (!s4985_adapter) {
-		error = -ENOMEM;
-		goto ERROR1;
-	}
-	s4985_algo = kzalloc(5 * sizeof(struct i2c_algorithm), GFP_KERNEL);
-	if (!s4985_algo) {
-		error = -ENOMEM;
-		goto ERROR2;
-	}
-
-	/* Fill in the new structures */
-	s4985_algo[0] = *(nforce2_smbus->algo);
-	s4985_algo[0].smbus_xfer = nforce2_access_virt0;
-	s4985_adapter[0] = *nforce2_smbus;
-	s4985_adapter[0].algo = s4985_algo;
-	s4985_adapter[0].dev.parent = nforce2_smbus->dev.parent;
-	for (i = 1; i < 5; i++) {
-		s4985_algo[i] = *(nforce2_smbus->algo);
-		s4985_adapter[i] = *nforce2_smbus;
-		snprintf(s4985_adapter[i].name, sizeof(s4985_adapter[i].name),
-			 "SMBus nForce2 adapter (CPU%d)", i - 1);
-		s4985_adapter[i].algo = s4985_algo + i;
-		s4985_adapter[i].dev.parent = nforce2_smbus->dev.parent;
-	}
-	s4985_algo[1].smbus_xfer = nforce2_access_virt1;
-	s4985_algo[2].smbus_xfer = nforce2_access_virt2;
-	s4985_algo[3].smbus_xfer = nforce2_access_virt3;
-	s4985_algo[4].smbus_xfer = nforce2_access_virt4;
-
-	/* Register virtual adapters */
-	for (i = 0; i < 5; i++) {
-		error = i2c_add_adapter(s4985_adapter + i);
-		if (error) {
-			printk(KERN_ERR "i2c-nforce2-s4985: "
-			       "Virtual adapter %d registration "
-			       "failed, module not inserted\n", i);
-			for (i--; i >= 0; i--)
-				i2c_del_adapter(s4985_adapter + i);
-			goto ERROR3;
-		}
-	}
-
-	return 0;
-
-ERROR3:
-	kfree(s4985_algo);
-	s4985_algo = NULL;
-ERROR2:
-	kfree(s4985_adapter);
-	s4985_adapter = NULL;
-ERROR1:
-	/* Restore physical bus */
-	i2c_add_adapter(nforce2_smbus);
-ERROR0:
-	return error;
-}
-
-static void __exit nforce2_s4985_exit(void)
-{
-	if (s4985_adapter) {
-		int i;
-
-		for (i = 0; i < 5; i++)
-			i2c_del_adapter(s4985_adapter+i);
-		kfree(s4985_adapter);
-		s4985_adapter = NULL;
-	}
-	kfree(s4985_algo);
-	s4985_algo = NULL;
-
-	/* Restore physical bus */
-	if (i2c_add_adapter(nforce2_smbus))
-		printk(KERN_ERR "i2c-nforce2-s4985: "
-		       "Physical bus restoration failed\n");
-}
-
-MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
-MODULE_DESCRIPTION("S4985 SMBus multiplexing");
-MODULE_LICENSE("GPL");
-
-module_init(nforce2_s4985_init);
-module_exit(nforce2_s4985_exit);