forked from Minki/linux
i2c-algo-sibyte: Merge into i2c-sibyte
i2c-algo-sibyte: Merge into i2c-sibyte Merge i2c-algo-sibyte into i2c-sibyte, as this is a complete, hardware-dependent SMBus implementation and not a reusable algorithm. Perform some basic coding style cleanups while we're here (mainly space-based indentation replaced by tabulations.) Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
parent
3fd3968754
commit
51c3711704
@ -53,12 +53,6 @@ config I2C_ALGO8XX
|
||||
tristate "MPC8xx CPM I2C interface"
|
||||
depends on 8xx && I2C
|
||||
|
||||
config I2C_ALGO_SIBYTE
|
||||
tristate "SiByte SMBus interface"
|
||||
depends on SIBYTE_SB1xxx_SOC && I2C
|
||||
help
|
||||
Supports the SiByte SOC on-chip I2C interfaces (2 channels).
|
||||
|
||||
config I2C_ALGO_SGI
|
||||
tristate "I2C SGI interfaces"
|
||||
depends on I2C && (SGI_IP22 || SGI_IP32 || X86_VISWS)
|
||||
|
@ -6,7 +6,6 @@ obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o
|
||||
obj-$(CONFIG_I2C_ALGOPCF) += i2c-algo-pcf.o
|
||||
obj-$(CONFIG_I2C_ALGOPCA) += i2c-algo-pca.o
|
||||
obj-$(CONFIG_I2C_ALGOITE) += i2c-algo-ite.o
|
||||
obj-$(CONFIG_I2C_ALGO_SIBYTE) += i2c-algo-sibyte.o
|
||||
obj-$(CONFIG_I2C_ALGO_SGI) += i2c-algo-sgi.o
|
||||
|
||||
ifeq ($(CONFIG_I2C_DEBUG_ALGO),y)
|
||||
|
@ -1,186 +0,0 @@
|
||||
/* ------------------------------------------------------------------------- */
|
||||
/* 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 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,
|
||||
.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");
|
||||
}
|
||||
|
||||
return i2c_add_adapter(i2c_adap);
|
||||
}
|
||||
|
||||
|
||||
int i2c_sibyte_del_bus(struct i2c_adapter *adap)
|
||||
{
|
||||
return i2c_del_adapter(adap);
|
||||
}
|
||||
|
||||
|
||||
EXPORT_SYMBOL(i2c_sibyte_add_bus);
|
||||
EXPORT_SYMBOL(i2c_sibyte_del_bus);
|
||||
|
||||
MODULE_AUTHOR("Kip Walker, Broadcom Corp.");
|
||||
MODULE_DESCRIPTION("SiByte I2C-Bus algorithm");
|
||||
module_param(bit_scan, int, 0);
|
||||
MODULE_PARM_DESC(bit_scan, "Scan for active chips on the bus");
|
||||
MODULE_LICENSE("GPL");
|
@ -1,6 +1,7 @@
|
||||
/*
|
||||
* Copyright (C) 2004 Steven J. Hill
|
||||
* 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
|
||||
@ -17,11 +18,162 @@
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/i2c-algo-sibyte.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/sibyte/sb1250_regs.h>
|
||||
#include <asm/sibyte/sb1250_smbus.h>
|
||||
|
||||
|
||||
struct i2c_algo_sibyte_data {
|
||||
void *data; /* private data */
|
||||
int bus; /* which bus */
|
||||
void *reg_base; /* CSR base */
|
||||
};
|
||||
|
||||
/* ----- 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 */
|
||||
module_param(bit_scan, int, 0);
|
||||
MODULE_PARM_DESC(bit_scan, "Scan for active chips on the bus");
|
||||
|
||||
|
||||
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 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,
|
||||
.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");
|
||||
}
|
||||
|
||||
return i2c_add_adapter(i2c_adap);
|
||||
}
|
||||
|
||||
|
||||
static struct i2c_algo_sibyte_data sibyte_board_data[2] = {
|
||||
{ NULL, 0, (void *) (CKSEG1+A_SMB_BASE(0)) },
|
||||
{ NULL, 1, (void *) (CKSEG1+A_SMB_BASE(1)) }
|
||||
@ -58,8 +210,8 @@ static int __init i2c_sibyte_init(void)
|
||||
|
||||
static void __exit i2c_sibyte_exit(void)
|
||||
{
|
||||
i2c_sibyte_del_bus(&sibyte_board_adapter[0]);
|
||||
i2c_sibyte_del_bus(&sibyte_board_adapter[1]);
|
||||
i2c_del_bus(&sibyte_board_adapter[0]);
|
||||
i2c_del_bus(&sibyte_board_adapter[1]);
|
||||
}
|
||||
|
||||
module_init(i2c_sibyte_init);
|
||||
|
@ -1,33 +0,0 @@
|
||||
/*
|
||||
* Copyright (C) 2001,2002,2003 Broadcom 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#ifndef I2C_ALGO_SIBYTE_H
|
||||
#define I2C_ALGO_SIBYTE_H 1
|
||||
|
||||
#include <linux/i2c.h>
|
||||
|
||||
struct i2c_algo_sibyte_data {
|
||||
void *data; /* private data */
|
||||
int bus; /* which bus */
|
||||
void *reg_base; /* CSR base */
|
||||
};
|
||||
|
||||
int i2c_sibyte_add_bus(struct i2c_adapter *, int speed);
|
||||
int i2c_sibyte_del_bus(struct i2c_adapter *);
|
||||
|
||||
#endif /* I2C_ALGO_SIBYTE_H */
|
Loading…
Reference in New Issue
Block a user