2.5.6 lm_sensors

@@ -0,0 +1,687 @@
+/*
+    i2c-ali1535.c - Part of lm_sensors, Linux kernel modules for hardware
+                    monitoring
+    Copyright (c) 2000  Frodo Looijaard <[email protected]>, 
+                        Philip Edelbrock <[email protected]>, 
+                        Mark D. Studebaker <[email protected]>,
+                        Dan Eaton <[email protected]> and 
+                        Stephen Rousset<[email protected]> 
+
+    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 <asm/semaphore.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/ioport.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/sensors.h>
+
+MODULE_LICENSE("GPL");
+
+#ifndef DECLARE_MUTEX
+#define DECLARE_MUTEX(name)  struct semaphore name = MUTEX
+#endif /* def DECLARE_MUTEX */
+
+/* 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
+
+/* 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;
+DECLARE_MUTEX(i2c_ali1535_sem);
+
+
+/* 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
+		    ("i2c-ali1535.o: 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
+		    ("i2c-ali1535.o: 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_DONE)) {
+	  /* issue "kill" to reset host controller */
+	  outb_p(ALI1535_KILL,SMBHSTTYP);
+	  outb_p(0xFF,SMBHSTSTS);
+	}	  
+	else if (temp & ALI1535_STS_ERR) {
+	  /* issue "timeout" to reset all devices on bus */
+	  outb_p(ALI1535_T_OUT,SMBHSTTYP);
+	  outb_p(0xFF,SMBHSTSTS);
+	}
+        
+	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;
+	s32 result = 0;
+
+	down(&i2c_ali1535_sem);
+/* 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");
+		result = -1;
+		goto EXIT;
+	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 */
+	  {
+		result = -1;
+		goto EXIT;
+          }
+
+	if ((read_write == I2C_SMBUS_WRITE) || (size == ALI1535_QUICK))
+	  {
+		result = 0;
+		goto EXIT;
+          }
+
+	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;
+	}
+EXIT:
+	up(&i2c_ali1535_sem);
+	return result;
+}
+
+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("i2c-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;
+}
+
+#ifdef RLX
+EXPORT_SYMBOL(ali1535_smba);
+EXPORT_SYMBOL(ali1535_access);
+EXPORT_SYMBOL(i2c_ali1535_sem);
+#else
+EXPORT_NO_SYMBOLS;
+#endif
+
+#ifdef MODULE
+
+MODULE_AUTHOR
+    ("Frodo Looijaard <[email protected]>, Philip Edelbrock <[email protected]>,\n"
+      "Mark D. Studebaker <[email protected]> and Dan Eaton <[email protected]>");
+MODULE_DESCRIPTION("ALI1535 SMBus driver");
+
+int init_module(void)
+{
+	return i2c_ali1535_init();
+}
+
+int cleanup_module(void)
+{
+	return ali1535_cleanup();
+}
+
+#endif				/* MODULE */
+

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