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(mds) add i2c-ali1535 driver from RocketLogix.

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@876 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark D. Studebaker 2000-09-16 02:44:58 +00:00
parent 8d7e6c94d7
commit f7cc1c20dd
3 changed files with 673 additions and 7 deletions
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14
README
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@ -23,8 +23,8 @@ but you may need to download it separately at:
http://www.netroedge.com/~lm78 http://www.netroedge.com/~lm78
Users of kernel 2.3.34 and later (and also all soon to be 2.4.x) kernels Users of kernel 2.3.34 and later (and also all soon to be 2.4.x) kernels
will be happy to know that the new I2C implementation has been included will be happy to know that the new I2C implementation has been included
in the kernel; you can still patch it with the latest version in the kernel; you may still need to patch it with the latest version
(see i2c/mkpatch/mkpatch.pl), but this is optional. if lm_sensors does not compile.
WARNING! The default module installation directory changed since version WARNING! The default module installation directory changed since version
2.2.1. If you don't change the directory in /etc/modules.conf (or 2.2.1. If you don't change the directory in /etc/modules.conf (or
@ -36,13 +36,13 @@ and module bit-mb is renamed i2c-via. You have been warned.
At least the following I2C/SMBus adapters are supported: At least the following I2C/SMBus adapters are supported:
Acer Labs M1541 and M1543C (used in the Aladdin IV, V and Pro 2 chipsets) Acer Labs M1533, M1535, and M1543C
AMD 756 AMD 756
Apple Hydra (used on some PPC machines) Apple Hydra (used on some PPC machines)
Intel I801 ICH/ICH0/ICH2 (used in Intel 810, 810E, 815E, 820, 840 chipsets) Intel I801 ICH/ICH0/ICH2 (used in Intel 810, 810E, 815E, 820, 840 chipsets)
Intel PIIX4 (used in many Intel chipsets) Intel PIIX4 (used in many Intel chipsets)
Intel I810/I815 GMCH Intel I810/I815 GMCH
SiS 5595 (used in many SiS chipsets) SiS 5595
3Dfx Voodoo 3 and Banshee 3Dfx Voodoo 3 and Banshee
VIA Technologies VT82C586B, VT82C596A/B, and VT82C686A VIA Technologies VT82C586B, VT82C596A/B, and VT82C686A
@ -55,9 +55,9 @@ At least the following hardware sensor chips are supported:
Genesys Logic GL518SM (rev 00, 80), GL520SM, GL523SM Genesys Logic GL518SM (rev 00, 80), GL520SM, GL523SM
Intel Xeon processor embedded sensors Intel Xeon processor embedded sensors
Maxim MAX1617 and MAX1617A Maxim MAX1617 and MAX1617A
National Semicoductor LM75, LM77, LM78, LM78-J, LM79. LM80, LM81, and LM84 National Semicoductor LM75, LM77, LM78, LM78-J, LM79,
SiS Southbridge (integrated in the chipset; the I2C adapter will also be LM80, LM81, LM84, and LM87
supported in the near future) SiS 5595 embedded sensors
TI THMC10 and THMC50 TI THMC10 and THMC50
VIA Technologies VT82C686A embedded sensors VIA Technologies VT82C686A embedded sensors
Winbond W83781D, W83782D, W83783S, and W83627HF Winbond W83781D, W83782D, W83783S, and W83627HF

1
kernel/busses/Module.mk
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@ -28,6 +28,7 @@ KERNELBUSSESTARGETS := $(MODULE_DIR)/i2c-i801.o \
$(MODULE_DIR)/i2c-voodoo3.o \ $(MODULE_DIR)/i2c-voodoo3.o \
$(MODULE_DIR)/i2c-amd756.o \ $(MODULE_DIR)/i2c-amd756.o \
$(MODULE_DIR)/i2c-i810.o \ $(MODULE_DIR)/i2c-i810.o \
$(MODULE_DIR)/i2c-ali1535.o \
$(MODULE_DIR)/i2c-sis5595.o $(MODULE_DIR)/i2c-sis5595.o
ifneq ($(shell if grep -q '^CONFIG_I2C_ALI15X3=y' $(LINUX)/.config; then echo 1; fi),1) ifneq ($(shell if grep -q '^CONFIG_I2C_ALI15X3=y' $(LINUX)/.config; then echo 1; fi),1)
KERNELBUSSESTARGETS += $(MODULE_DIR)/i2c-ali15x3.o KERNELBUSSESTARGETS += $(MODULE_DIR)/i2c-ali15x3.o

665
kernel/busses/i2c-ali1535.c Normal file
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@ -0,0 +1,665 @@
/*
ali1535.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>,
Philip Edelbrock <phil@netroedge.com>,
Mark D. Studebaker <mdsxyz123@yahoo.com>,
Dan Eaton <dan.eaton@rocketlogix.com> and
Stephen Rousset <stephen.rousset@rocketlogix.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.
*/
/*
This is the driver for the SMB Host controller on
Acer Labs Inc. (ALI) M1535 South Bridge.
The M1535 is a South bridge for portable systems.
It is very similar to the M15x3 South bridges also produced
by Acer Labs Inc. Some of the registers within the part
have moved and some have been redefined slightly. Additionally,
the sequencing of the SMBus transactions has been modified
to be more consistent with the sequencing recommended by
the manufacturer and observed through testing. These
changes are reflected in this driver and can be identified
by comparing this driver to the i2c-ali15x3 driver.
For an overview of these chips see http://www.acerlabs.com
The SMB controller is part of the 7101 device, which is an
ACPI-compliant Power Management Unit (PMU).
The whole 7101 device has to be enabled for the SMB to work.
You can't just enable the SMB alone.
The SMB and the ACPI have separate I/O spaces.
We make sure that the SMB is enabled. We leave the ACPI alone.
This driver controls the SMB Host only.
This driver does not use interrupts.
*/
/* Note: we assume there can only be one ALI1535, with one SMBus interface */
#include <linux/version.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
#include "version.h"
#include <linux/init.h>
/* ALI1535 SMBus address offsets */
#define SMBHSTSTS (0 + ali1535_smba)
#define SMBHSTTYP (1 + ali1535_smba)
#define SMBHSTPORT (2 + ali1535_smba)
#define SMBHSTCMD (7 + ali1535_smba)
#define SMBHSTADD (3 + ali1535_smba)
#define SMBHSTDAT0 (4 + ali1535_smba)
#define SMBHSTDAT1 (5 + ali1535_smba)
#define SMBBLKDAT (6 + ali1535_smba)
/* PCI Address Constants */
#define SMBCOM 0x004
#define SMBREV 0x008
#define SMBCFG 0x0D1
#define SMBBA 0x0E2
#define SMBHSTCFG 0x0F0
#define SMBCLK 0x0F2
/* #define SMBATPC 0x05B <dwe - not supported> used to unlock xxxBA registers */
/* #define SMBSLVC 0x0E1 <dwe> slave mode not supported*/
/* Other settings */
#define MAX_TIMEOUT 500 /* times 1/100 sec */
#define ALI1535_SMB_IOSIZE 32
/*
*/
#define ALI1535_SMB_DEFAULTBASE 0x8040
/* ALI1535 address lock bits */
#define ALI1535_LOCK 0x06 < dwe >
/* ALI1535 command constants */
#define ALI1535_QUICK 0x00
#define ALI1535_BYTE 0x10
#define ALI1535_BYTE_DATA 0x20
#define ALI1535_WORD_DATA 0x30
#define ALI1535_BLOCK_DATA 0x40
#define ALI1535_I2C_READ 0x60
#define ALI1535_DEV10B_EN 0x80 /* Enable 10-bit addressing in */
/* I2C read */
#define ALI1535_T_OUT 0x08 /* Time-out Command (write) */
#define ALI1535_A_HIGH_BIT9 0x08 /* Bit 9 of 10-bit address in */
/* Alert-Response-Address */
/* (read) */
#define ALI1535_KILL 0x04 /* Kill Command (write) */
#define ALI1535_A_HIGH_BIT8 0x04 /* Bit 8 of 10-bit address in */
/* Alert-Response-Address */
/* (read) */
#define ALI1535_D_HI_MASK 0x03 /* Mask for isolating bits 9-8 */
/* of 10-bit address in I2C */
/* Read Command */
/* ALI1535 status register bits */
#define ALI1535_STS_IDLE 0x04
#define ALI1535_STS_BUSY 0x08 /* host busy */
#define ALI1535_STS_DONE 0x10 /* transaction complete */
#define ALI1535_STS_DEV 0x20 /* device error */
#define ALI1535_STS_BUSERR 0x40 /* bus error */
#define ALI1535_STS_FAIL 0x80 /* failed bus transaction */
#define ALI1535_STS_ERR 0xE0 /* all the bad error bits */
#define ALI1535_BLOCK_CLR 0x04 /* reset block data index */
/* ALI1535 device address register bits */
#define ALI1535_RD_ADDR 0x01 /* Read/Write Bit in Device */
/* Address field */
/* -> Write = 0 */
/* -> Read = 1 */
#define ALI1535_SMBIO_EN 0x04 /* SMB I/O Space enable */
#ifdef MODULE
static
#else
extern
#endif
int __init i2c_ali1535_init(void);
static int __init ali1535_cleanup(void);
static int ali1535_setup(void);
static s32 ali1535_access(struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size,
union i2c_smbus_data *data);
static void ali1535_do_pause(unsigned int amount);
static int ali1535_transaction(void);
static void ali1535_inc(struct i2c_adapter *adapter);
static void ali1535_dec(struct i2c_adapter *adapter);
static u32 ali1535_func(struct i2c_adapter *adapter);
#ifdef MODULE
extern int init_module(void);
extern int cleanup_module(void);
#endif /* MODULE */
static struct i2c_algorithm smbus_algorithm = {
/* name */ "Non-i2c SMBus adapter",
/* id */ I2C_ALGO_SMBUS,
/* master_xfer */ NULL,
/* smbus_access */ ali1535_access,
/* slave_send */ NULL,
/* slave_rcv */ NULL,
/* algo_control */ NULL,
/* functionality */ ali1535_func,
};
static struct i2c_adapter ali1535_adapter = {
"unset",
I2C_ALGO_SMBUS | I2C_HW_SMBUS_ALI1535,
&smbus_algorithm,
NULL,
ali1535_inc,
ali1535_dec,
NULL,
NULL,
};
static int __initdata ali1535_initialized;
static unsigned short ali1535_smba = 0;
/* Detect whether a ALI1535 can be found, and initialize it, where necessary.
Note the differences between kernels with the old PCI BIOS interface and
newer kernels with the real PCI interface. In compat.h some things are
defined to make the transition easier. */
int ali1535_setup(void)
{
int error_return = 0;
unsigned char temp;
struct pci_dev *ALI1535_dev;
/* First check whether we can access PCI at all */
if (pci_present() == 0) {
printk("i2c-ali1535.o: Error: No PCI-bus found!\n");
error_return = -ENODEV;
goto END;
}
/* Look for the ALI1535, M7101 device */
ALI1535_dev = NULL;
ALI1535_dev = pci_find_device(PCI_VENDOR_ID_AL,
PCI_DEVICE_ID_AL_M7101,
ALI1535_dev);
if (ALI1535_dev == NULL) {
printk("i2c-ali1535.o: Error: Can't detect ali1535!\n");
error_return = -ENODEV;
goto END;
}
/* Check the following things:
- SMB I/O address is initialized
- Device is enabled
- We can use the addresses
*/
/* Determine the address of the SMBus area */
pci_read_config_word(ALI1535_dev, SMBBA, &ali1535_smba);
ali1535_smba &= (0xffff & ~(ALI1535_SMB_IOSIZE - 1));
if (ali1535_smba == 0) {
printk
("i2c-ali1535.o: ALI1535_smb region uninitialized - upgrade BIOS?\n");
error_return = -ENODEV;
}
if (error_return == -ENODEV)
goto END;
if (check_region(ali1535_smba, ALI1535_SMB_IOSIZE)) {
printk
("i2c-ali1535.o: ALI1535_smb region 0x%x already in use!\n",
ali1535_smba);
error_return = -ENODEV;
}
if (error_return == -ENODEV)
goto END;
/* check if whole device is enabled */
pci_read_config_byte(ALI1535_dev, SMBCFG, &temp);
if ((temp & ALI1535_SMBIO_EN) == 0) {
printk
("SMBUS: Error: SMB device not enabled - upgrade BIOS?\n");
error_return = -ENODEV;
goto END;
}
/* Is SMB Host controller enabled? */
pci_read_config_byte(ALI1535_dev, SMBHSTCFG, &temp);
if ((temp & 1) == 0) {
printk
("SMBUS: Error: Host SMBus controller not enabled - upgrade BIOS?\n");
error_return = -ENODEV;
goto END;
}
/* set SMB clock to 74KHz as recommended in data sheet */
pci_write_config_byte(ALI1535_dev, SMBCLK, 0x20);
/* Everything is happy, let's grab the memory and set things up. */
request_region(ali1535_smba, ALI1535_SMB_IOSIZE, "ali1535-smb");
#ifdef DEBUG
/*
The interrupt routing for SMB is set up in register 0x77 in the
1533 ISA Bridge device, NOT in the 7101 device.
Don't bother with finding the 1533 device and reading the register.
if ((....... & 0x0F) == 1)
printk("i2c-ali1535.o: ALI1535 using Interrupt 9 for SMBus.\n");
*/
pci_read_config_byte(ALI1535_dev, SMBREV, &temp);
printk("i2c-ali1535.o: SMBREV = 0x%X\n", temp);
printk("i2c-ali1535.o: ALI1535_smba = 0x%X\n", ali1535_smba);
#endif /* DEBUG */
END:
return error_return;
}
/* Internally used pause function */
void ali1535_do_pause(unsigned int amount)
{
current->state = TASK_INTERRUPTIBLE;
schedule_timeout(amount);
}
/* Another internally used function */
int ali1535_transaction(void)
{
int temp;
int result = 0;
int timeout = 0;
#ifdef DEBUG
printk
("i2c-ali1535.o: Transaction (pre): STS=%02x, TYP=%02x, CMD=%02x, ADD=%02x, DAT0=%02x, "
"DAT1=%02x\n", inb_p(SMBHSTSTS), inb_p(SMBHSTTYP),
inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
inb_p(SMBHSTDAT1));
#endif
/* get status */
temp = inb_p(SMBHSTSTS);
/* Make sure the SMBus host is ready to start transmitting */
/* Check the busy bit first */
if (temp & ALI1535_STS_BUSY) {
/*
If the host controller is still busy, it may have timed out in the previous transaction,
resulting in a "SMBus Timeout" printk.
I've tried the following to reset a stuck busy bit.
1. Reset the controller with an KILL command.
(this doesn't seem to clear the controller if an external device is hung)
2. Reset the controller and the other SMBus devices with a T_OUT command.
(this clears the host busy bit if an external device is hung,
but it comes back upon a new access to a device)
3. Disable and reenable the controller in SMBHSTCFG
Worst case, nothing seems to work except power reset.
*/
/* Abort - reset the host controller */
/*
#ifdef DEBUG
printk("i2c-ali1535.o: Resetting host controller to clear busy condition\n",temp);
#endif
outb_p(ALI1535_KILL, SMBHSTTYP);
temp = inb_p(SMBHSTSTS);
if (temp & ALI1535_STS_BUSY) {
*/
/*
Try resetting entire SMB bus, including other devices -
This may not work either - it clears the BUSY bit but
then the BUSY bit may come back on when you try and use the chip again.
If that's the case you are stuck.
*/
printk
("i2c-ali1535.o: Resetting entire SMB Bus to clear busy condition (%02x)\n",
temp);
outb_p(ALI1535_T_OUT, SMBHSTTYP);
temp = inb_p(SMBHSTSTS);
}
/*
}
*/
/* now check the error bits and the busy bit */
if (temp & (ALI1535_STS_ERR | ALI1535_STS_BUSY)) {
/* do a clear-on-write */
outb_p(0xFF, SMBHSTSTS);
if ((temp = inb_p(SMBHSTSTS)) &
(ALI1535_STS_ERR | ALI1535_STS_BUSY)) {
/* this is probably going to be correctable only by a power reset
as one of the bits now appears to be stuck */
/* This may be a bus or device with electrical problems. */
printk
("i2c-ali1535.o: SMBus reset failed! (0x%02x) - controller or device on bus is probably hung\n",
temp);
return -1;
}
} else {
/* check and clear done bit */
if (temp & ALI1535_STS_DONE) {
outb_p(temp, SMBHSTSTS);
}
}
/* start the transaction by writing anything to the start register */
outb_p(0xFF, SMBHSTPORT);
/* We will always wait for a fraction of a second! */
timeout = 0;
do {
ali1535_do_pause(1);
temp = inb_p(SMBHSTSTS);
} while (((temp & ALI1535_STS_BUSY) && !(temp & ALI1535_STS_IDLE))
&& (timeout++ < MAX_TIMEOUT));
/* If the SMBus is still busy, we give up */
if (timeout >= MAX_TIMEOUT) {
result = -1;
printk("i2c-ali1535.o: SMBus Timeout!\n");
}
if (temp & ALI1535_STS_FAIL) {
result = -1;
#ifdef DEBUG
printk("i2c-ali1535.o: Error: Failed bus transaction\n");
#endif
}
/*
Unfortunately the ALI SMB controller maps "no response" and "bus collision"
into a single bit. No reponse is the usual case so don't do a printk.
This means that bus collisions go unreported.
*/
if (temp & ALI1535_STS_BUSERR) {
result = -1;
#ifdef DEBUG
printk
("i2c-ali1535.o: Error: no response or bus collision ADD=%02x\n",
inb_p(SMBHSTADD));
#endif
}
/* haven't ever seen this */
if (temp & ALI1535_STS_DEV) {
result = -1;
printk("i2c-ali1535.o: Error: device error\n");
}
/*
check to see if the "command complete" indication is set
*/
if (!(temp & ALI1535_STS_DONE)) {
result = -1;
printk("i2c-ali1535.o: Error: command never completed\n");
}
#ifdef DEBUG
printk
("i2c-ali1535.o: Transaction (post): STS=%02x, TYP=%02x, CMD=%02x, ADD=%02x, "
"DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTSTS), inb_p(SMBHSTTYP),
inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
inb_p(SMBHSTDAT1));
#endif
/*
take consequent actions for error conditions
*/
if (temp & ALI1535_STS_ERR) {
/* issue "timeout" to reset all devices on bus */
outb_p(ALI1535_T_OUT,SMBHSTTYP);
}
else if (!(temp & ALI1535_STS_DONE)) {
/* issue "kill" to reset host controller */
outb_p(ALI1535_KILL,SMBHSTTYP);
}
return result;
}
/* Return -1 on error. See smbus.h for more information */
s32 ali1535_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write, u8 command,
int size, union i2c_smbus_data * data)
{
int i, len;
int temp;
int timeout;
/* make sure SMBus is idle */
temp = inb_p(SMBHSTSTS);
for (timeout = 0;
(timeout < MAX_TIMEOUT) && !(temp & ALI1535_STS_IDLE);
timeout++) {
ali1535_do_pause(1);
temp = inb_p(SMBHSTSTS);
}
if (timeout >= MAX_TIMEOUT) {
printk("i2c-ali1535.o: Idle wait Timeout! STS=0x%02x\n",
temp);
}
/* clear status register (clear-on-write) */
outb_p(0xFF, SMBHSTSTS);
switch (size) {
case I2C_SMBUS_PROC_CALL:
printk
("i2c-ali1535.o: I2C_SMBUS_PROC_CALL not supported!\n");
return -1;
case I2C_SMBUS_QUICK:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMBHSTADD);
size = ALI1535_QUICK;
outb_p(size, SMBHSTTYP); /* output command */
break;
case I2C_SMBUS_BYTE:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMBHSTADD);
size = ALI1535_BYTE;
outb_p(size, SMBHSTTYP); /* output command */
if (read_write == I2C_SMBUS_WRITE)
outb_p(command, SMBHSTCMD);
break;
case I2C_SMBUS_BYTE_DATA:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMBHSTADD);
size = ALI1535_BYTE_DATA;
outb_p(size, SMBHSTTYP); /* output command */
outb_p(command, SMBHSTCMD);
if (read_write == I2C_SMBUS_WRITE)
outb_p(data->byte, SMBHSTDAT0);
break;
case I2C_SMBUS_WORD_DATA:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMBHSTADD);
size = ALI1535_WORD_DATA;
outb_p(size, SMBHSTTYP); /* output command */
outb_p(command, SMBHSTCMD);
if (read_write == I2C_SMBUS_WRITE) {
outb_p(data->word & 0xff, SMBHSTDAT0);
outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
}
break;
case I2C_SMBUS_BLOCK_DATA:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
SMBHSTADD);
size = ALI1535_BLOCK_DATA;
outb_p(size, SMBHSTTYP); /* output command */
outb_p(command, SMBHSTCMD);
if (read_write == I2C_SMBUS_WRITE) {
len = data->block[0];
if (len < 0) {
len = 0;
data->block[0] = len;
}
if (len > 32) {
len = 32;
data->block[0] = len;
}
outb_p(len, SMBHSTDAT0);
outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); /* Reset SMBBLKDAT */
for (i = 1; i <= len; i++)
outb_p(data->block[i], SMBBLKDAT);
}
break;
}
if (ali1535_transaction()) /* Error in transaction */
return -1;
if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK))
return 0;
switch (size) {
case ALI1535_BYTE: /* Result put in SMBHSTDAT0 */
data->byte = inb_p(SMBHSTDAT0);
break;
case ALI1535_BYTE_DATA:
data->byte = inb_p(SMBHSTDAT0);
break;
case ALI1535_WORD_DATA:
data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
break;
case ALI1535_BLOCK_DATA:
len = inb_p(SMBHSTDAT0);
if (len > 32)
len = 32;
data->block[0] = len;
outb_p(inb_p(SMBHSTTYP) | ALI1535_BLOCK_CLR, SMBHSTTYP); /* Reset SMBBLKDAT */
for (i = 1; i <= data->block[0]; i++) {
data->block[i] = inb_p(SMBBLKDAT);
#ifdef DEBUG
printk
("i2c-ali1535.o: Blk: len=%d, i=%d, data=%02x\n",
len, i, data->block[i]);
#endif /* DEBUG */
}
break;
}
return 0;
}
void ali1535_inc(struct i2c_adapter *adapter)
{
MOD_INC_USE_COUNT;
}
void ali1535_dec(struct i2c_adapter *adapter)
{
MOD_DEC_USE_COUNT;
}
u32 ali1535_func(struct i2c_adapter *adapter)
{
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA;
}
int __init i2c_ali1535_init(void)
{
int res;
printk("ali1535.o version %s (%s)\n", LM_VERSION, LM_DATE);
#ifdef DEBUG
/* PE- It might be good to make this a permanent part of the code! */
if (ali1535_initialized) {
printk
("i2c-ali1535.o: Oops, ali1535_init called a second time!\n");
return -EBUSY;
}
#endif
ali1535_initialized = 0;
if ((res = ali1535_setup())) {
printk
("i2c-ali1535.o: ALI1535 not detected, module not inserted.\n");
ali1535_cleanup();
return res;
}
ali1535_initialized++;
sprintf(ali1535_adapter.name, "SMBus ALI1535 adapter at %04x",
ali1535_smba);
if ((res = i2c_add_adapter(&ali1535_adapter))) {
printk
("i2c-ali1535.o: Adapter registration failed, module not inserted.\n");
ali1535_cleanup();
return res;
}
ali1535_initialized++;
printk
("i2c-ali1535.o: ALI1535 SMBus Controller detected and initialized\n");
return 0;
}
int __init ali1535_cleanup(void)
{
int res;
if (ali1535_initialized >= 2) {
if ((res = i2c_del_adapter(&ali1535_adapter))) {
printk
("i2c-ali1535.o: i2c_del_adapter failed, module not removed\n");
return res;
} else
ali1535_initialized--;
}
if (ali1535_initialized >= 1) {
release_region(ali1535_smba, ALI1535_SMB_IOSIZE);
ali1535_initialized--;
}
return 0;
}
EXPORT_NO_SYMBOLS;
#ifdef MODULE
MODULE_AUTHOR
("Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>, Mark D. Studebaker <mdsxyz123@yahoo.com>, Dan Eaton <dan.eaton@rocketlogix.com, and Stephen.Rousset <stephen.rousset@rocketlogix.com");
MODULE_DESCRIPTION("ALI1535 SMBus driver");
int init_module(void)
{
return i2c_ali1535_init();
}
int cleanup_module(void)
{
return ali1535_cleanup();
}
#endif /* MODULE */