[deliverable/linux.git] / drivers / hwmon / smsc47b397.c

/*
    smsc47b397.c - Part of lm_sensors, Linux kernel modules
			for hardware monitoring

    Supports the SMSC LPC47B397-NC Super-I/O chip.

    Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com>
	Copyright (C) 2004 Utilitek Systems, Inc.

    derived in part from smsc47m1.c:
	Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
	Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>

    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.
*/

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <asm/io.h>

static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");

static struct platform_device *pdev;

#define DRVNAME "smsc47b397"

/* Super-I/0 registers and commands */

#define	REG	0x2e	/* The register to read/write */
#define	VAL	0x2f	/* The value to read/write */

static inline void superio_outb(int reg, int val)
{
	outb(reg, REG);
	outb(val, VAL);
}

static inline int superio_inb(int reg)
{
	outb(reg, REG);
	return inb(VAL);
}

/* select superio logical device */
static inline void superio_select(int ld)
{
	superio_outb(0x07, ld);
}

static inline void superio_enter(void)
{
	outb(0x55, REG);
}

static inline void superio_exit(void)
{
	outb(0xAA, REG);
}

#define SUPERIO_REG_DEVID	0x20
#define SUPERIO_REG_DEVREV	0x21
#define SUPERIO_REG_BASE_MSB	0x60
#define SUPERIO_REG_BASE_LSB	0x61
#define SUPERIO_REG_LD8		0x08

#define SMSC_EXTENT		0x02

/* 0 <= nr <= 3 */
static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
#define SMSC47B397_REG_TEMP(nr)	(smsc47b397_reg_temp[(nr)])

/* 0 <= nr <= 3 */
#define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr))
#define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))

struct smsc47b397_data {
	unsigned short addr;
	const char *name;
	struct device *hwmon_dev;
	struct mutex lock;

	struct mutex update_lock;
	unsigned long last_updated; /* in jiffies */
	int valid;

	/* register values */
	u16 fan[4];
	u8 temp[4];
};

static int smsc47b397_read_value(struct smsc47b397_data* data, u8 reg)
{
	int res;

	mutex_lock(&data->lock);
	outb(reg, data->addr);
	res = inb_p(data->addr + 1);
	mutex_unlock(&data->lock);
	return res;
}

static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
{
	struct smsc47b397_data *data = dev_get_drvdata(dev);
	int i;

	mutex_lock(&data->update_lock);

	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
		dev_dbg(dev, "starting device update...\n");

		/* 4 temperature inputs, 4 fan inputs */
		for (i = 0; i < 4; i++) {
			data->temp[i] = smsc47b397_read_value(data,
					SMSC47B397_REG_TEMP(i));

			/* must read LSB first */
			data->fan[i]  = smsc47b397_read_value(data,
					SMSC47B397_REG_FAN_LSB(i));
			data->fan[i] |= smsc47b397_read_value(data,
					SMSC47B397_REG_FAN_MSB(i)) << 8;
		}

		data->last_updated = jiffies;
		data->valid = 1;

		dev_dbg(dev, "... device update complete\n");
	}

	mutex_unlock(&data->update_lock);

	return data;
}

/* TEMP: 0.001C/bit (-128C to +127C)
   REG: 1C/bit, two's complement */
static int temp_from_reg(u8 reg)
{
	return (s8)reg * 1000;
}

static ssize_t show_temp(struct device *dev, struct device_attribute
			 *devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct smsc47b397_data *data = smsc47b397_update_device(dev);
	return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
}

static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);

/* FAN: 1 RPM/bit
   REG: count of 90kHz pulses / revolution */
static int fan_from_reg(u16 reg)
{
	if (reg == 0 || reg == 0xffff)
		return 0;
	return 90000 * 60 / reg;
}

static ssize_t show_fan(struct device *dev, struct device_attribute
			*devattr, char *buf)
{
	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	struct smsc47b397_data *data = smsc47b397_update_device(dev);
	return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
}
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);

static ssize_t show_name(struct device *dev, struct device_attribute
			 *devattr, char *buf)
{
	struct smsc47b397_data *data = dev_get_drvdata(dev);
	return sprintf(buf, "%s\n", data->name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);

static struct attribute *smsc47b397_attributes[] = {
	&sensor_dev_attr_temp1_input.dev_attr.attr,
	&sensor_dev_attr_temp2_input.dev_attr.attr,
	&sensor_dev_attr_temp3_input.dev_attr.attr,
	&sensor_dev_attr_temp4_input.dev_attr.attr,
	&sensor_dev_attr_fan1_input.dev_attr.attr,
	&sensor_dev_attr_fan2_input.dev_attr.attr,
	&sensor_dev_attr_fan3_input.dev_attr.attr,
	&sensor_dev_attr_fan4_input.dev_attr.attr,

	&dev_attr_name.attr,
	NULL
};

static const struct attribute_group smsc47b397_group = {
	.attrs = smsc47b397_attributes,
};

static int __devexit smsc47b397_remove(struct platform_device *pdev)
{
	struct smsc47b397_data *data = platform_get_drvdata(pdev);
	struct resource *res;

	hwmon_device_unregister(data->hwmon_dev);
	sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	release_region(res->start, SMSC_EXTENT);
	kfree(data);

	return 0;
}

static int smsc47b397_probe(struct platform_device *pdev);

static struct platform_driver smsc47b397_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= DRVNAME,
	},
	.probe		= smsc47b397_probe,
	.remove		= __devexit_p(smsc47b397_remove),
};

static int __devinit smsc47b397_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct smsc47b397_data *data;
	struct resource *res;
	int err = 0;

	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (!request_region(res->start, SMSC_EXTENT,
			    smsc47b397_driver.driver.name)) {
		dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
			(unsigned long)res->start,
			(unsigned long)res->start + SMSC_EXTENT - 1);
		return -EBUSY;
	}

	if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) {
		err = -ENOMEM;
		goto error_release;
	}

	data->addr = res->start;
	data->name = "smsc47b397";
	mutex_init(&data->lock);
	mutex_init(&data->update_lock);
	platform_set_drvdata(pdev, data);

	if ((err = sysfs_create_group(&dev->kobj, &smsc47b397_group)))
		goto error_free;

	data->hwmon_dev = hwmon_device_register(dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		goto error_remove;
	}

	return 0;

error_remove:
	sysfs_remove_group(&dev->kobj, &smsc47b397_group);
error_free:
	kfree(data);
error_release:
	release_region(res->start, SMSC_EXTENT);
	return err;
}

static int __init smsc47b397_device_add(unsigned short address)
{
	struct resource res = {
		.start	= address,
		.end	= address + SMSC_EXTENT - 1,
		.name	= DRVNAME,
		.flags	= IORESOURCE_IO,
	};
	int err;

	pdev = platform_device_alloc(DRVNAME, address);
	if (!pdev) {
		err = -ENOMEM;
		printk(KERN_ERR DRVNAME ": Device allocation failed\n");
		goto exit;
	}

	err = platform_device_add_resources(pdev, &res, 1);
	if (err) {
		printk(KERN_ERR DRVNAME ": Device resource addition failed "
		       "(%d)\n", err);
		goto exit_device_put;
	}

	err = platform_device_add(pdev);
	if (err) {
		printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
		       err);
		goto exit_device_put;
	}

	return 0;

exit_device_put:
	platform_device_put(pdev);
exit:
	return err;
}

static int __init smsc47b397_find(unsigned short *addr)
{
	u8 id, rev;
	char *name;

	superio_enter();
	id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);

	switch(id) {
	case 0x81:
		name = "SCH5307-NS";
		break;
	case 0x6f:
		name = "LPC47B397-NC";
		break;
	case 0x85:
	case 0x8c:
		name = "SCH5317";
		break;
	default:
		superio_exit();
		return -ENODEV;
	}

	rev = superio_inb(SUPERIO_REG_DEVREV);

	superio_select(SUPERIO_REG_LD8);
	*addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
		 |  superio_inb(SUPERIO_REG_BASE_LSB);

	printk(KERN_INFO DRVNAME ": found SMSC %s "
		"(base address 0x%04x, revision %u)\n",
		name, *addr, rev);

	superio_exit();
	return 0;
}

static int __init smsc47b397_init(void)
{
	unsigned short address;
	int ret;

	if ((ret = smsc47b397_find(&address)))
		return ret;

	ret = platform_driver_register(&smsc47b397_driver);
	if (ret)
		goto exit;

	/* Sets global pdev as a side effect */
	ret = smsc47b397_device_add(address);
	if (ret)
		goto exit_driver;

	return 0;

exit_driver:
	platform_driver_unregister(&smsc47b397_driver);
exit:
	return ret;
}

static void __exit smsc47b397_exit(void)
{
	platform_device_unregister(pdev);
	platform_driver_unregister(&smsc47b397_driver);
}

MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
MODULE_DESCRIPTION("SMSC LPC47B397 driver");
MODULE_LICENSE("GPL");

module_init(smsc47b397_init);
module_exit(smsc47b397_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	smsc47b397.c - Part of lm_sensors, Linux kernel modules
	3	for hardware monitoring
	4
	5	Supports the SMSC LPC47B397-NC Super-I/O chip.
	6
	7	Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com>
	8	Copyright (C) 2004 Utilitek Systems, Inc.
	9
	10	derived in part from smsc47m1.c:
	11	Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
	12	Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>
	13
	14	This program is free software; you can redistribute it and/or modify
	15	it under the terms of the GNU General Public License as published by
	16	the Free Software Foundation; either version 2 of the License, or
	17	(at your option) any later version.
	18
	19	This program is distributed in the hope that it will be useful,
	20	but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	GNU General Public License for more details.
	23
	24	You should have received a copy of the GNU General Public License
	25	along with this program; if not, write to the Free Software
	26	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	27	*/
	28
	29	#include <linux/module.h>
	30	#include <linux/slab.h>
	31	#include <linux/ioport.h>
	32	#include <linux/jiffies.h>
292fc1a5	33	#include <linux/platform_device.h>
943b0830	34	#include <linux/hwmon.h>
3659a017	35	#include <linux/hwmon-sysfs.h>
943b0830	36	#include <linux/err.h>
1da177e4	37	#include <linux/init.h>
9a61bf63	38	#include <linux/mutex.h>
1da177e4 LT	39	#include <asm/io.h>
1da177e4 LT	40
67b671bc JD	41	static unsigned short force_id;
	42	module_param(force_id, ushort, 0);
	43	MODULE_PARM_DESC(force_id, "Override the detected device ID");
	44
292fc1a5 JD	45	static struct platform_device *pdev;
	46
	47	#define DRVNAME "smsc47b397"
1da177e4 LT	48
	49	/* Super-I/0 registers and commands */
	50
	51	#define REG 0x2e /* The register to read/write */
	52	#define VAL 0x2f /* The value to read/write */
	53
	54	static inline void superio_outb(int reg, int val)
	55	{
	56	outb(reg, REG);
	57	outb(val, VAL);
	58	}
	59
	60	static inline int superio_inb(int reg)
	61	{
	62	outb(reg, REG);
	63	return inb(VAL);
	64	}
	65
	66	/* select superio logical device */
	67	static inline void superio_select(int ld)
	68	{
	69	superio_outb(0x07, ld);
	70	}
	71
	72	static inline void superio_enter(void)
	73	{
	74	outb(0x55, REG);
	75	}
	76
	77	static inline void superio_exit(void)
	78	{
	79	outb(0xAA, REG);
	80	}
	81
	82	#define SUPERIO_REG_DEVID 0x20
	83	#define SUPERIO_REG_DEVREV 0x21
	84	#define SUPERIO_REG_BASE_MSB 0x60
	85	#define SUPERIO_REG_BASE_LSB 0x61
	86	#define SUPERIO_REG_LD8 0x08
	87
	88	#define SMSC_EXTENT 0x02
	89
	90	/* 0 <= nr <= 3 */
	91	static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
	92	#define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)])
	93
	94	/* 0 <= nr <= 3 */
	95	#define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr))
	96	#define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))
	97
	98	struct smsc47b397_data {
292fc1a5 JD	99	unsigned short addr;
292fc1a5 JD	100	const char *name;
1beeffe4	101	struct device *hwmon_dev;
9a61bf63	102	struct mutex lock;
1da177e4	103
9a61bf63	104	struct mutex update_lock;
1da177e4 LT	105	unsigned long last_updated; /* in jiffies */
	106	int valid;
	107
	108	/* register values */
	109	u16 fan[4];
	110	u8 temp[4];
	111	};
	112
292fc1a5	113	static int smsc47b397_read_value(struct smsc47b397_data* data, u8 reg)
1da177e4	114	{
1da177e4 LT	115	int res;
1da177e4 LT	116
9a61bf63	117	mutex_lock(&data->lock);
292fc1a5 JD	118	outb(reg, data->addr);
292fc1a5 JD	119	res = inb_p(data->addr + 1);
9a61bf63	120	mutex_unlock(&data->lock);
1da177e4 LT	121	return res;
	122	}
	123
	124	static struct smsc47b397_data smsc47b397_update_device(struct device dev)
	125	{
292fc1a5	126	struct smsc47b397_data *data = dev_get_drvdata(dev);
1da177e4 LT	127	int i;
1da177e4 LT	128
9a61bf63	129	mutex_lock(&data->update_lock);
1da177e4 LT	130
1da177e4 LT	131	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
292fc1a5	132	dev_dbg(dev, "starting device update...\n");
1da177e4 LT	133
	134	/* 4 temperature inputs, 4 fan inputs */
	135	for (i = 0; i < 4; i++) {
292fc1a5	136	data->temp[i] = smsc47b397_read_value(data,
1da177e4 LT	137	SMSC47B397_REG_TEMP(i));
	138
	139	/* must read LSB first */
292fc1a5	140	data->fan[i] = smsc47b397_read_value(data,
1da177e4	141	SMSC47B397_REG_FAN_LSB(i));
292fc1a5	142	data->fan[i] \|= smsc47b397_read_value(data,
1da177e4 LT	143	SMSC47B397_REG_FAN_MSB(i)) << 8;
	144	}
	145
	146	data->last_updated = jiffies;
	147	data->valid = 1;
	148
292fc1a5	149	dev_dbg(dev, "... device update complete\n");
1da177e4 LT	150	}
1da177e4 LT	151
9a61bf63	152	mutex_unlock(&data->update_lock);
1da177e4 LT	153
	154	return data;
	155	}
	156
	157	/* TEMP: 0.001C/bit (-128C to +127C)
	158	REG: 1C/bit, two's complement */
	159	static int temp_from_reg(u8 reg)
	160	{
	161	return (s8)reg * 1000;
	162	}
	163
3659a017 JD	164	static ssize_t show_temp(struct device *dev, struct device_attribute
3659a017 JD	165	devattr, char buf)
1da177e4	166	{
3659a017	167	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1da177e4	168	struct smsc47b397_data *data = smsc47b397_update_device(dev);
3659a017	169	return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
1da177e4 LT	170	}
1da177e4 LT	171
3659a017 JD	172	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
	173	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
	174	static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
	175	static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
1da177e4	176
1da177e4 LT	177	/* FAN: 1 RPM/bit
	178	REG: count of 90kHz pulses / revolution */
	179	static int fan_from_reg(u16 reg)
	180	{
90205c6c JD	181	if (reg == 0 \|\| reg == 0xffff)
90205c6c JD	182	return 0;
1da177e4 LT	183	return 90000 * 60 / reg;
	184	}
	185
3659a017 JD	186	static ssize_t show_fan(struct device *dev, struct device_attribute
3659a017 JD	187	devattr, char buf)
1da177e4	188	{
3659a017 JD	189	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	190	struct smsc47b397_data *data = smsc47b397_update_device(dev);
	191	return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
1da177e4	192	}
3659a017 JD	193	static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
	194	static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
	195	static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
	196	static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
1da177e4	197
292fc1a5 JD	198	static ssize_t show_name(struct device *dev, struct device_attribute
	199	devattr, char buf)
	200	{
	201	struct smsc47b397_data *data = dev_get_drvdata(dev);
	202	return sprintf(buf, "%s\n", data->name);
	203	}
	204	static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
	205
c1685f61	206	static struct attribute *smsc47b397_attributes[] = {
3659a017 JD	207	&sensor_dev_attr_temp1_input.dev_attr.attr,
	208	&sensor_dev_attr_temp2_input.dev_attr.attr,
	209	&sensor_dev_attr_temp3_input.dev_attr.attr,
	210	&sensor_dev_attr_temp4_input.dev_attr.attr,
	211	&sensor_dev_attr_fan1_input.dev_attr.attr,
	212	&sensor_dev_attr_fan2_input.dev_attr.attr,
	213	&sensor_dev_attr_fan3_input.dev_attr.attr,
	214	&sensor_dev_attr_fan4_input.dev_attr.attr,
c1685f61	215
292fc1a5	216	&dev_attr_name.attr,
c1685f61 MH	217	NULL
	218	};
	219
	220	static const struct attribute_group smsc47b397_group = {
	221	.attrs = smsc47b397_attributes,
	222	};
1da177e4	223
292fc1a5	224	static int __devexit smsc47b397_remove(struct platform_device *pdev)
1da177e4	225	{
292fc1a5 JD	226	struct smsc47b397_data *data = platform_get_drvdata(pdev);
292fc1a5 JD	227	struct resource *res;
1da177e4	228
1beeffe4	229	hwmon_device_unregister(data->hwmon_dev);
292fc1a5 JD	230	sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
	231	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	232	release_region(res->start, SMSC_EXTENT);
943b0830	233	kfree(data);
1da177e4 LT	234
	235	return 0;
	236	}
	237
292fc1a5	238	static int smsc47b397_probe(struct platform_device *pdev);
2d8672c5	239
292fc1a5	240	static struct platform_driver smsc47b397_driver = {
cdaf7934	241	.driver = {
87218842	242	.owner = THIS_MODULE,
292fc1a5	243	.name = DRVNAME,
cdaf7934	244	},
292fc1a5 JD	245	.probe = smsc47b397_probe,
292fc1a5 JD	246	.remove = __devexit_p(smsc47b397_remove),
1da177e4 LT	247	};
1da177e4 LT	248
292fc1a5	249	static int __devinit smsc47b397_probe(struct platform_device *pdev)
1da177e4	250	{
292fc1a5	251	struct device *dev = &pdev->dev;
1da177e4	252	struct smsc47b397_data *data;
292fc1a5	253	struct resource *res;
1da177e4 LT	254	int err = 0;
1da177e4 LT	255
292fc1a5 JD	256	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
292fc1a5 JD	257	if (!request_region(res->start, SMSC_EXTENT,
cdaf7934	258	smsc47b397_driver.driver.name)) {
292fc1a5 JD	259	dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
	260	(unsigned long)res->start,
	261	(unsigned long)res->start + SMSC_EXTENT - 1);
1da177e4 LT	262	return -EBUSY;
	263	}
	264
ba9c2e8d	265	if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) {
1da177e4 LT	266	err = -ENOMEM;
	267	goto error_release;
	268	}
1da177e4	269
292fc1a5 JD	270	data->addr = res->start;
292fc1a5 JD	271	data->name = "smsc47b397";
9a61bf63	272	mutex_init(&data->lock);
9a61bf63	273	mutex_init(&data->update_lock);
292fc1a5	274	platform_set_drvdata(pdev, data);
1da177e4	275
292fc1a5	276	if ((err = sysfs_create_group(&dev->kobj, &smsc47b397_group)))
1da177e4 LT	277	goto error_free;
1da177e4 LT	278
1beeffe4 TJ	279	data->hwmon_dev = hwmon_device_register(dev);
	280	if (IS_ERR(data->hwmon_dev)) {
	281	err = PTR_ERR(data->hwmon_dev);
c1685f61	282	goto error_remove;
943b0830 MH	283	}
943b0830 MH	284
1da177e4 LT	285	return 0;
1da177e4 LT	286
c1685f61	287	error_remove:
292fc1a5	288	sysfs_remove_group(&dev->kobj, &smsc47b397_group);
1da177e4	289	error_free:
1f57ff89	290	kfree(data);
1da177e4	291	error_release:
292fc1a5 JD	292	release_region(res->start, SMSC_EXTENT);
	293	return err;
	294	}
	295
	296	static int __init smsc47b397_device_add(unsigned short address)
	297	{
	298	struct resource res = {
	299	.start = address,
	300	.end = address + SMSC_EXTENT - 1,
	301	.name = DRVNAME,
	302	.flags = IORESOURCE_IO,
	303	};
	304	int err;
	305
	306	pdev = platform_device_alloc(DRVNAME, address);
	307	if (!pdev) {
	308	err = -ENOMEM;
	309	printk(KERN_ERR DRVNAME ": Device allocation failed\n");
	310	goto exit;
	311	}
	312
	313	err = platform_device_add_resources(pdev, &res, 1);
	314	if (err) {
	315	printk(KERN_ERR DRVNAME ": Device resource addition failed "
	316	"(%d)\n", err);
	317	goto exit_device_put;
	318	}
	319
	320	err = platform_device_add(pdev);
	321	if (err) {
	322	printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
	323	err);
	324	goto exit_device_put;
	325	}
	326
	327	return 0;
	328
	329	exit_device_put:
	330	platform_device_put(pdev);
	331	exit:
1da177e4 LT	332	return err;
	333	}
	334
2d8672c5	335	static int __init smsc47b397_find(unsigned short *addr)
1da177e4 LT	336	{
1da177e4 LT	337	u8 id, rev;
80930776	338	char *name;
1da177e4 LT	339
1da177e4 LT	340	superio_enter();
67b671bc	341	id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
1da177e4	342
80930776 CK	343	switch(id) {
	344	case 0x81:
	345	name = "SCH5307-NS";
	346	break;
	347	case 0x6f:
	348	name = "LPC47B397-NC";
	349	break;
	350	case 0x85:
	351	case 0x8c:
	352	name = "SCH5317";
	353	break;
	354	default:
1da177e4 LT	355	superio_exit();
	356	return -ENODEV;
	357	}
	358
	359	rev = superio_inb(SUPERIO_REG_DEVREV);
	360
	361	superio_select(SUPERIO_REG_LD8);
	362	*addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
	363	\| superio_inb(SUPERIO_REG_BASE_LSB);
	364
292fc1a5	365	printk(KERN_INFO DRVNAME ": found SMSC %s "
7ab83a91	366	"(base address 0x%04x, revision %u)\n",
80930776	367	name, *addr, rev);
1da177e4 LT	368
	369	superio_exit();
	370	return 0;
	371	}
	372
	373	static int __init smsc47b397_init(void)
	374	{
292fc1a5	375	unsigned short address;
1da177e4 LT	376	int ret;
1da177e4 LT	377
2d8672c5	378	if ((ret = smsc47b397_find(&address)))
1da177e4 LT	379	return ret;
1da177e4 LT	380
292fc1a5 JD	381	ret = platform_driver_register(&smsc47b397_driver);
	382	if (ret)
	383	goto exit;
	384
	385	/* Sets global pdev as a side effect */
	386	ret = smsc47b397_device_add(address);
	387	if (ret)
	388	goto exit_driver;
	389
	390	return 0;
	391
	392	exit_driver:
	393	platform_driver_unregister(&smsc47b397_driver);
	394	exit:
	395	return ret;
1da177e4 LT	396	}
	397
	398	static void __exit smsc47b397_exit(void)
	399	{
292fc1a5 JD	400	platform_device_unregister(pdev);
292fc1a5 JD	401	platform_driver_unregister(&smsc47b397_driver);
1da177e4 LT	402	}
	403
	404	MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
	405	MODULE_DESCRIPTION("SMSC LPC47B397 driver");
	406	MODULE_LICENSE("GPL");
	407
	408	module_init(smsc47b397_init);
	409	module_exit(smsc47b397_exit);