[linux-block.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 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;

	superio_enter();
	id = superio_inb(SUPERIO_REG_DEVID);

	if ((id != 0x6f) && (id != 0x81) && (id != 0x85)) {
		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",
		id == 0x81 ? "SCH5307-NS" : id == 0x85 ? "SCH5317" :
	       "LPC47B397-NC", *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
292fc1a5 JD	41	static struct platform_device *pdev;
	42
	43	#define DRVNAME "smsc47b397"
1da177e4 LT	44
	45	/* Super-I/0 registers and commands */
	46
	47	#define REG 0x2e /* The register to read/write */
	48	#define VAL 0x2f /* The value to read/write */
	49
	50	static inline void superio_outb(int reg, int val)
	51	{
	52	outb(reg, REG);
	53	outb(val, VAL);
	54	}
	55
	56	static inline int superio_inb(int reg)
	57	{
	58	outb(reg, REG);
	59	return inb(VAL);
	60	}
	61
	62	/* select superio logical device */
	63	static inline void superio_select(int ld)
	64	{
	65	superio_outb(0x07, ld);
	66	}
	67
	68	static inline void superio_enter(void)
	69	{
	70	outb(0x55, REG);
	71	}
	72
	73	static inline void superio_exit(void)
	74	{
	75	outb(0xAA, REG);
	76	}
	77
	78	#define SUPERIO_REG_DEVID 0x20
	79	#define SUPERIO_REG_DEVREV 0x21
	80	#define SUPERIO_REG_BASE_MSB 0x60
	81	#define SUPERIO_REG_BASE_LSB 0x61
	82	#define SUPERIO_REG_LD8 0x08
	83
	84	#define SMSC_EXTENT 0x02
	85
	86	/* 0 <= nr <= 3 */
	87	static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
	88	#define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)])
	89
	90	/* 0 <= nr <= 3 */
	91	#define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr))
	92	#define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))
	93
	94	struct smsc47b397_data {
292fc1a5 JD	95	unsigned short addr;
292fc1a5 JD	96	const char *name;
1beeffe4	97	struct device *hwmon_dev;
9a61bf63	98	struct mutex lock;
1da177e4	99
9a61bf63	100	struct mutex update_lock;
1da177e4 LT	101	unsigned long last_updated; /* in jiffies */
	102	int valid;
	103
	104	/* register values */
	105	u16 fan[4];
	106	u8 temp[4];
	107	};
	108
292fc1a5	109	static int smsc47b397_read_value(struct smsc47b397_data* data, u8 reg)
1da177e4	110	{
1da177e4 LT	111	int res;
1da177e4 LT	112
9a61bf63	113	mutex_lock(&data->lock);
292fc1a5 JD	114	outb(reg, data->addr);
292fc1a5 JD	115	res = inb_p(data->addr + 1);
9a61bf63	116	mutex_unlock(&data->lock);
1da177e4 LT	117	return res;
	118	}
	119
	120	static struct smsc47b397_data smsc47b397_update_device(struct device dev)
	121	{
292fc1a5	122	struct smsc47b397_data *data = dev_get_drvdata(dev);
1da177e4 LT	123	int i;
1da177e4 LT	124
9a61bf63	125	mutex_lock(&data->update_lock);
1da177e4 LT	126
1da177e4 LT	127	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
292fc1a5	128	dev_dbg(dev, "starting device update...\n");
1da177e4 LT	129
	130	/* 4 temperature inputs, 4 fan inputs */
	131	for (i = 0; i < 4; i++) {
292fc1a5	132	data->temp[i] = smsc47b397_read_value(data,
1da177e4 LT	133	SMSC47B397_REG_TEMP(i));
	134
	135	/* must read LSB first */
292fc1a5	136	data->fan[i] = smsc47b397_read_value(data,
1da177e4	137	SMSC47B397_REG_FAN_LSB(i));
292fc1a5	138	data->fan[i] \|= smsc47b397_read_value(data,
1da177e4 LT	139	SMSC47B397_REG_FAN_MSB(i)) << 8;
	140	}
	141
	142	data->last_updated = jiffies;
	143	data->valid = 1;
	144
292fc1a5	145	dev_dbg(dev, "... device update complete\n");
1da177e4 LT	146	}
1da177e4 LT	147
9a61bf63	148	mutex_unlock(&data->update_lock);
1da177e4 LT	149
	150	return data;
	151	}
	152
	153	/* TEMP: 0.001C/bit (-128C to +127C)
	154	REG: 1C/bit, two's complement */
	155	static int temp_from_reg(u8 reg)
	156	{
	157	return (s8)reg * 1000;
	158	}
	159
3659a017 JD	160	static ssize_t show_temp(struct device *dev, struct device_attribute
3659a017 JD	161	devattr, char buf)
1da177e4	162	{
3659a017	163	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1da177e4	164	struct smsc47b397_data *data = smsc47b397_update_device(dev);
3659a017	165	return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
1da177e4 LT	166	}
1da177e4 LT	167
3659a017 JD	168	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
	169	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
	170	static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
	171	static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
1da177e4	172
1da177e4 LT	173	/* FAN: 1 RPM/bit
	174	REG: count of 90kHz pulses / revolution */
	175	static int fan_from_reg(u16 reg)
	176	{
90205c6c JD	177	if (reg == 0 \|\| reg == 0xffff)
90205c6c JD	178	return 0;
1da177e4 LT	179	return 90000 * 60 / reg;
	180	}
	181
3659a017 JD	182	static ssize_t show_fan(struct device *dev, struct device_attribute
3659a017 JD	183	devattr, char buf)
1da177e4	184	{
3659a017 JD	185	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	186	struct smsc47b397_data *data = smsc47b397_update_device(dev);
	187	return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
1da177e4	188	}
3659a017 JD	189	static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
	190	static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
	191	static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
	192	static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
1da177e4	193
292fc1a5 JD	194	static ssize_t show_name(struct device *dev, struct device_attribute
	195	devattr, char buf)
	196	{
	197	struct smsc47b397_data *data = dev_get_drvdata(dev);
	198	return sprintf(buf, "%s\n", data->name);
	199	}
	200	static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
	201
c1685f61	202	static struct attribute *smsc47b397_attributes[] = {
3659a017 JD	203	&sensor_dev_attr_temp1_input.dev_attr.attr,
	204	&sensor_dev_attr_temp2_input.dev_attr.attr,
	205	&sensor_dev_attr_temp3_input.dev_attr.attr,
	206	&sensor_dev_attr_temp4_input.dev_attr.attr,
	207	&sensor_dev_attr_fan1_input.dev_attr.attr,
	208	&sensor_dev_attr_fan2_input.dev_attr.attr,
	209	&sensor_dev_attr_fan3_input.dev_attr.attr,
	210	&sensor_dev_attr_fan4_input.dev_attr.attr,
c1685f61	211
292fc1a5	212	&dev_attr_name.attr,
c1685f61 MH	213	NULL
	214	};
	215
	216	static const struct attribute_group smsc47b397_group = {
	217	.attrs = smsc47b397_attributes,
	218	};
1da177e4	219
292fc1a5	220	static int __devexit smsc47b397_remove(struct platform_device *pdev)
1da177e4	221	{
292fc1a5 JD	222	struct smsc47b397_data *data = platform_get_drvdata(pdev);
292fc1a5 JD	223	struct resource *res;
1da177e4	224
1beeffe4	225	hwmon_device_unregister(data->hwmon_dev);
292fc1a5 JD	226	sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
	227	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	228	release_region(res->start, SMSC_EXTENT);
943b0830	229	kfree(data);
1da177e4 LT	230
	231	return 0;
	232	}
	233
292fc1a5	234	static int smsc47b397_probe(struct platform_device *pdev);
2d8672c5	235
292fc1a5	236	static struct platform_driver smsc47b397_driver = {
cdaf7934	237	.driver = {
87218842	238	.owner = THIS_MODULE,
292fc1a5	239	.name = DRVNAME,
cdaf7934	240	},
292fc1a5 JD	241	.probe = smsc47b397_probe,
292fc1a5 JD	242	.remove = __devexit_p(smsc47b397_remove),
1da177e4 LT	243	};
1da177e4 LT	244
292fc1a5	245	static int __devinit smsc47b397_probe(struct platform_device *pdev)
1da177e4	246	{
292fc1a5	247	struct device *dev = &pdev->dev;
1da177e4	248	struct smsc47b397_data *data;
292fc1a5	249	struct resource *res;
1da177e4 LT	250	int err = 0;
1da177e4 LT	251
292fc1a5 JD	252	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
292fc1a5 JD	253	if (!request_region(res->start, SMSC_EXTENT,
cdaf7934	254	smsc47b397_driver.driver.name)) {
292fc1a5 JD	255	dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
	256	(unsigned long)res->start,
	257	(unsigned long)res->start + SMSC_EXTENT - 1);
1da177e4 LT	258	return -EBUSY;
	259	}
	260
ba9c2e8d	261	if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) {
1da177e4 LT	262	err = -ENOMEM;
	263	goto error_release;
	264	}
1da177e4	265
292fc1a5 JD	266	data->addr = res->start;
292fc1a5 JD	267	data->name = "smsc47b397";
9a61bf63	268	mutex_init(&data->lock);
9a61bf63	269	mutex_init(&data->update_lock);
292fc1a5	270	platform_set_drvdata(pdev, data);
1da177e4	271
292fc1a5	272	if ((err = sysfs_create_group(&dev->kobj, &smsc47b397_group)))
1da177e4 LT	273	goto error_free;
1da177e4 LT	274
1beeffe4 TJ	275	data->hwmon_dev = hwmon_device_register(dev);
	276	if (IS_ERR(data->hwmon_dev)) {
	277	err = PTR_ERR(data->hwmon_dev);
c1685f61	278	goto error_remove;
943b0830 MH	279	}
943b0830 MH	280
1da177e4 LT	281	return 0;
1da177e4 LT	282
c1685f61	283	error_remove:
292fc1a5	284	sysfs_remove_group(&dev->kobj, &smsc47b397_group);
1da177e4	285	error_free:
1f57ff89	286	kfree(data);
1da177e4	287	error_release:
292fc1a5 JD	288	release_region(res->start, SMSC_EXTENT);
	289	return err;
	290	}
	291
	292	static int __init smsc47b397_device_add(unsigned short address)
	293	{
	294	struct resource res = {
	295	.start = address,
	296	.end = address + SMSC_EXTENT - 1,
	297	.name = DRVNAME,
	298	.flags = IORESOURCE_IO,
	299	};
	300	int err;
	301
	302	pdev = platform_device_alloc(DRVNAME, address);
	303	if (!pdev) {
	304	err = -ENOMEM;
	305	printk(KERN_ERR DRVNAME ": Device allocation failed\n");
	306	goto exit;
	307	}
	308
	309	err = platform_device_add_resources(pdev, &res, 1);
	310	if (err) {
	311	printk(KERN_ERR DRVNAME ": Device resource addition failed "
	312	"(%d)\n", err);
	313	goto exit_device_put;
	314	}
	315
	316	err = platform_device_add(pdev);
	317	if (err) {
	318	printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
	319	err);
	320	goto exit_device_put;
	321	}
	322
	323	return 0;
	324
	325	exit_device_put:
	326	platform_device_put(pdev);
	327	exit:
1da177e4 LT	328	return err;
	329	}
	330
2d8672c5	331	static int __init smsc47b397_find(unsigned short *addr)
1da177e4 LT	332	{
	333	u8 id, rev;
	334
	335	superio_enter();
	336	id = superio_inb(SUPERIO_REG_DEVID);
	337
2dbbdb35	338	if ((id != 0x6f) && (id != 0x81) && (id != 0x85)) {
1da177e4 LT	339	superio_exit();
	340	return -ENODEV;
	341	}
	342
	343	rev = superio_inb(SUPERIO_REG_DEVREV);
	344
	345	superio_select(SUPERIO_REG_LD8);
	346	*addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
	347	\| superio_inb(SUPERIO_REG_BASE_LSB);
	348
292fc1a5	349	printk(KERN_INFO DRVNAME ": found SMSC %s "
7ab83a91	350	"(base address 0x%04x, revision %u)\n",
2dbbdb35 JH	351	id == 0x81 ? "SCH5307-NS" : id == 0x85 ? "SCH5317" :
2dbbdb35 JH	352	"LPC47B397-NC", *addr, rev);
1da177e4 LT	353
	354	superio_exit();
	355	return 0;
	356	}
	357
	358	static int __init smsc47b397_init(void)
	359	{
292fc1a5	360	unsigned short address;
1da177e4 LT	361	int ret;
1da177e4 LT	362
2d8672c5	363	if ((ret = smsc47b397_find(&address)))
1da177e4 LT	364	return ret;
1da177e4 LT	365
292fc1a5 JD	366	ret = platform_driver_register(&smsc47b397_driver);
	367	if (ret)
	368	goto exit;
	369
	370	/* Sets global pdev as a side effect */
	371	ret = smsc47b397_device_add(address);
	372	if (ret)
	373	goto exit_driver;
	374
	375	return 0;
	376
	377	exit_driver:
	378	platform_driver_unregister(&smsc47b397_driver);
	379	exit:
	380	return ret;
1da177e4 LT	381	}
	382
	383	static void __exit smsc47b397_exit(void)
	384	{
292fc1a5 JD	385	platform_device_unregister(pdev);
292fc1a5 JD	386	platform_driver_unregister(&smsc47b397_driver);
1da177e4 LT	387	}
	388
	389	MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
	390	MODULE_DESCRIPTION("SMSC LPC47B397 driver");
	391	MODULE_LICENSE("GPL");
	392
	393	module_init(smsc47b397_init);
	394	module_exit(smsc47b397_exit);