f0bb60e7b1
Files that don't use CONFIG_* stuff shouldn't include config.h Files that use CONFIG_* stuff should include config.h It's that simple. ;-) Signed-off-by: Alexey Dobriyan <adobriyan@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/*
|
|
i2c-stub.c - Part of lm_sensors, Linux kernel modules for hardware
|
|
monitoring
|
|
|
|
Copyright (c) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
|
|
|
|
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.
|
|
*/
|
|
|
|
#define DEBUG 1
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/i2c.h>
|
|
|
|
static u8 stub_pointer;
|
|
static u8 stub_bytes[256];
|
|
static u16 stub_words[256];
|
|
|
|
/* Return -1 on error. */
|
|
static s32 stub_xfer(struct i2c_adapter * adap, u16 addr, unsigned short flags,
|
|
char read_write, u8 command, int size, union i2c_smbus_data * data)
|
|
{
|
|
s32 ret;
|
|
|
|
switch (size) {
|
|
|
|
case I2C_SMBUS_QUICK:
|
|
dev_dbg(&adap->dev, "smbus quick - addr 0x%02x\n", addr);
|
|
ret = 0;
|
|
break;
|
|
|
|
case I2C_SMBUS_BYTE:
|
|
if (read_write == I2C_SMBUS_WRITE) {
|
|
stub_pointer = command;
|
|
dev_dbg(&adap->dev, "smbus byte - addr 0x%02x, "
|
|
"wrote 0x%02x.\n",
|
|
addr, command);
|
|
} else {
|
|
data->byte = stub_bytes[stub_pointer++];
|
|
dev_dbg(&adap->dev, "smbus byte - addr 0x%02x, "
|
|
"read 0x%02x.\n",
|
|
addr, data->byte);
|
|
}
|
|
|
|
ret = 0;
|
|
break;
|
|
|
|
case I2C_SMBUS_BYTE_DATA:
|
|
if (read_write == I2C_SMBUS_WRITE) {
|
|
stub_bytes[command] = data->byte;
|
|
dev_dbg(&adap->dev, "smbus byte data - addr 0x%02x, "
|
|
"wrote 0x%02x at 0x%02x.\n",
|
|
addr, data->byte, command);
|
|
} else {
|
|
data->byte = stub_bytes[command];
|
|
dev_dbg(&adap->dev, "smbus byte data - addr 0x%02x, "
|
|
"read 0x%02x at 0x%02x.\n",
|
|
addr, data->byte, command);
|
|
}
|
|
stub_pointer = command + 1;
|
|
|
|
ret = 0;
|
|
break;
|
|
|
|
case I2C_SMBUS_WORD_DATA:
|
|
if (read_write == I2C_SMBUS_WRITE) {
|
|
stub_words[command] = data->word;
|
|
dev_dbg(&adap->dev, "smbus word data - addr 0x%02x, "
|
|
"wrote 0x%04x at 0x%02x.\n",
|
|
addr, data->word, command);
|
|
} else {
|
|
data->word = stub_words[command];
|
|
dev_dbg(&adap->dev, "smbus word data - addr 0x%02x, "
|
|
"read 0x%04x at 0x%02x.\n",
|
|
addr, data->word, command);
|
|
}
|
|
|
|
ret = 0;
|
|
break;
|
|
|
|
default:
|
|
dev_dbg(&adap->dev, "Unsupported I2C/SMBus command\n");
|
|
ret = -1;
|
|
break;
|
|
} /* switch (size) */
|
|
|
|
return ret;
|
|
}
|
|
|
|
static u32 stub_func(struct i2c_adapter *adapter)
|
|
{
|
|
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
|
|
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA;
|
|
}
|
|
|
|
static struct i2c_algorithm smbus_algorithm = {
|
|
.name = "Non-I2C SMBus adapter",
|
|
.id = I2C_ALGO_SMBUS,
|
|
.functionality = stub_func,
|
|
.smbus_xfer = stub_xfer,
|
|
};
|
|
|
|
static struct i2c_adapter stub_adapter = {
|
|
.owner = THIS_MODULE,
|
|
.class = I2C_CLASS_HWMON,
|
|
.algo = &smbus_algorithm,
|
|
.name = "SMBus stub driver",
|
|
};
|
|
|
|
static int __init i2c_stub_init(void)
|
|
{
|
|
printk(KERN_INFO "i2c-stub loaded\n");
|
|
return i2c_add_adapter(&stub_adapter);
|
|
}
|
|
|
|
static void __exit i2c_stub_exit(void)
|
|
{
|
|
i2c_del_adapter(&stub_adapter);
|
|
}
|
|
|
|
MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
|
|
MODULE_DESCRIPTION("I2C stub driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(i2c_stub_init);
|
|
module_exit(i2c_stub_exit);
|
|
|