forked from luck/tmp_suning_uos_patched
605070952f
Kill explicit static initializations to 0 in 10 i2c drivers. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> drivers/i2c/algos/i2c-algo-pca.c | 2 +- drivers/i2c/algos/i2c-algo-sibyte.c | 2 +- drivers/i2c/busses/i2c-ali15x3.c | 4 ++-- drivers/i2c/busses/i2c-amd756.c | 2 +- drivers/i2c/busses/i2c-iop3xx.c | 2 +- drivers/i2c/busses/i2c-piix4.c | 8 ++++---- drivers/i2c/busses/i2c-sis5595.c | 4 ++-- drivers/i2c/busses/i2c-sis630.c | 2 +- drivers/i2c/busses/i2c-sis96x.c | 2 +- drivers/i2c/busses/i2c-via.c | 2 +- 10 files changed, 15 insertions(+), 15 deletions(-)
218 lines
6.8 KiB
C
218 lines
6.8 KiB
C
/* ------------------------------------------------------------------------- */
|
|
/* i2c-algo-sibyte.c i2c driver algorithms for bit-shift adapters */
|
|
/* ------------------------------------------------------------------------- */
|
|
/* Copyright (C) 2001,2002,2003 Broadcom Corporation
|
|
Copyright (C) 1995-2000 Simon G. Vogl
|
|
|
|
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. */
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/* With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and even
|
|
Frodo Looijaard <frodol@dds.nl>. */
|
|
|
|
/* Ported for SiByte SOCs by Broadcom Corporation. */
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/sibyte/sb1250_regs.h>
|
|
#include <asm/sibyte/sb1250_smbus.h>
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/i2c-algo-sibyte.h>
|
|
|
|
/* ----- global defines ----------------------------------------------- */
|
|
#define SMB_CSR(a,r) ((long)(a->reg_base + r))
|
|
|
|
/* ----- global variables --------------------------------------------- */
|
|
|
|
/* module parameters:
|
|
*/
|
|
static int bit_scan; /* have a look at what's hanging 'round */
|
|
|
|
|
|
static int smbus_xfer(struct i2c_adapter *i2c_adap, u16 addr,
|
|
unsigned short flags, char read_write,
|
|
u8 command, int size, union i2c_smbus_data * data)
|
|
{
|
|
struct i2c_algo_sibyte_data *adap = i2c_adap->algo_data;
|
|
int data_bytes = 0;
|
|
int error;
|
|
|
|
while (csr_in32(SMB_CSR(adap, R_SMB_STATUS)) & M_SMB_BUSY)
|
|
;
|
|
|
|
switch (size) {
|
|
case I2C_SMBUS_QUICK:
|
|
csr_out32((V_SMB_ADDR(addr) | (read_write == I2C_SMBUS_READ ? M_SMB_QDATA : 0) |
|
|
V_SMB_TT_QUICKCMD), SMB_CSR(adap, R_SMB_START));
|
|
break;
|
|
case I2C_SMBUS_BYTE:
|
|
if (read_write == I2C_SMBUS_READ) {
|
|
csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_RD1BYTE),
|
|
SMB_CSR(adap, R_SMB_START));
|
|
data_bytes = 1;
|
|
} else {
|
|
csr_out32(V_SMB_CMD(command), SMB_CSR(adap, R_SMB_CMD));
|
|
csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_WR1BYTE),
|
|
SMB_CSR(adap, R_SMB_START));
|
|
}
|
|
break;
|
|
case I2C_SMBUS_BYTE_DATA:
|
|
csr_out32(V_SMB_CMD(command), SMB_CSR(adap, R_SMB_CMD));
|
|
if (read_write == I2C_SMBUS_READ) {
|
|
csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_CMD_RD1BYTE),
|
|
SMB_CSR(adap, R_SMB_START));
|
|
data_bytes = 1;
|
|
} else {
|
|
csr_out32(V_SMB_LB(data->byte), SMB_CSR(adap, R_SMB_DATA));
|
|
csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_WR2BYTE),
|
|
SMB_CSR(adap, R_SMB_START));
|
|
}
|
|
break;
|
|
case I2C_SMBUS_WORD_DATA:
|
|
csr_out32(V_SMB_CMD(command), SMB_CSR(adap, R_SMB_CMD));
|
|
if (read_write == I2C_SMBUS_READ) {
|
|
csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_CMD_RD2BYTE),
|
|
SMB_CSR(adap, R_SMB_START));
|
|
data_bytes = 2;
|
|
} else {
|
|
csr_out32(V_SMB_LB(data->word & 0xff), SMB_CSR(adap, R_SMB_DATA));
|
|
csr_out32(V_SMB_MB(data->word >> 8), SMB_CSR(adap, R_SMB_DATA));
|
|
csr_out32((V_SMB_ADDR(addr) | V_SMB_TT_WR2BYTE),
|
|
SMB_CSR(adap, R_SMB_START));
|
|
}
|
|
break;
|
|
default:
|
|
return -1; /* XXXKW better error code? */
|
|
}
|
|
|
|
while (csr_in32(SMB_CSR(adap, R_SMB_STATUS)) & M_SMB_BUSY)
|
|
;
|
|
|
|
error = csr_in32(SMB_CSR(adap, R_SMB_STATUS));
|
|
if (error & M_SMB_ERROR) {
|
|
/* Clear error bit by writing a 1 */
|
|
csr_out32(M_SMB_ERROR, SMB_CSR(adap, R_SMB_STATUS));
|
|
return -1; /* XXXKW better error code? */
|
|
}
|
|
|
|
if (data_bytes == 1)
|
|
data->byte = csr_in32(SMB_CSR(adap, R_SMB_DATA)) & 0xff;
|
|
if (data_bytes == 2)
|
|
data->word = csr_in32(SMB_CSR(adap, R_SMB_DATA)) & 0xffff;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int algo_control(struct i2c_adapter *adapter,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static u32 bit_func(struct i2c_adapter *adap)
|
|
{
|
|
return (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
|
|
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA);
|
|
}
|
|
|
|
|
|
/* -----exported algorithm data: ------------------------------------- */
|
|
|
|
static struct i2c_algorithm i2c_sibyte_algo = {
|
|
.smbus_xfer = smbus_xfer,
|
|
.algo_control = algo_control, /* ioctl */
|
|
.functionality = bit_func,
|
|
};
|
|
|
|
/*
|
|
* registering functions to load algorithms at runtime
|
|
*/
|
|
int i2c_sibyte_add_bus(struct i2c_adapter *i2c_adap, int speed)
|
|
{
|
|
int i;
|
|
struct i2c_algo_sibyte_data *adap = i2c_adap->algo_data;
|
|
|
|
/* register new adapter to i2c module... */
|
|
i2c_adap->algo = &i2c_sibyte_algo;
|
|
|
|
/* Set the frequency to 100 kHz */
|
|
csr_out32(speed, SMB_CSR(adap,R_SMB_FREQ));
|
|
csr_out32(0, SMB_CSR(adap,R_SMB_CONTROL));
|
|
|
|
/* scan bus */
|
|
if (bit_scan) {
|
|
union i2c_smbus_data data;
|
|
int rc;
|
|
printk(KERN_INFO " i2c-algo-sibyte.o: scanning bus %s.\n",
|
|
i2c_adap->name);
|
|
for (i = 0x00; i < 0x7f; i++) {
|
|
/* XXXKW is this a realistic probe? */
|
|
rc = smbus_xfer(i2c_adap, i, 0, I2C_SMBUS_READ, 0,
|
|
I2C_SMBUS_BYTE_DATA, &data);
|
|
if (!rc) {
|
|
printk("(%02x)",i);
|
|
} else
|
|
printk(".");
|
|
}
|
|
printk("\n");
|
|
}
|
|
|
|
i2c_add_adapter(i2c_adap);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
int i2c_sibyte_del_bus(struct i2c_adapter *adap)
|
|
{
|
|
int res;
|
|
|
|
if ((res = i2c_del_adapter(adap)) < 0)
|
|
return res;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init i2c_algo_sibyte_init (void)
|
|
{
|
|
printk("i2c-algo-sibyte.o: i2c SiByte algorithm module\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
EXPORT_SYMBOL(i2c_sibyte_add_bus);
|
|
EXPORT_SYMBOL(i2c_sibyte_del_bus);
|
|
|
|
#ifdef MODULE
|
|
MODULE_AUTHOR("Kip Walker, Broadcom Corp.");
|
|
MODULE_DESCRIPTION("SiByte I2C-Bus algorithm");
|
|
MODULE_PARM(bit_scan, "i");
|
|
MODULE_PARM_DESC(bit_scan, "Scan for active chips on the bus");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
int init_module(void)
|
|
{
|
|
return i2c_algo_sibyte_init();
|
|
}
|
|
|
|
void cleanup_module(void)
|
|
{
|
|
}
|
|
#endif
|