[mirror_ubuntu-bionic-kernel.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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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 <linux/acpi.h>
#include <linux/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;
	}

	data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL);
	if (!data) {
		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);

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

	err = acpi_check_resource_conflict(&res);
	if (err)
		goto exit;

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

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

	err = platform_device_add(pdev);
	if (err) {
		pr_err("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(void)
{
	u8 id, rev;
	char *name;
	unsigned short addr;

	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);

	pr_info("found SMSC %s (base address 0x%04x, revision %u)\n",
		name, addr, rev);

	superio_exit();
	return addr;
}

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

	ret = smsc47b397_find();
	if (ret < 0)
		return ret;
	address = 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	1	/*
2a52dd66 GR	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	*/
1da177e4	28
bf1a85ef JP	29	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
bf1a85ef JP	30
1da177e4 LT	31	#include <linux/module.h>
	32	#include <linux/slab.h>
	33	#include <linux/ioport.h>
	34	#include <linux/jiffies.h>
292fc1a5	35	#include <linux/platform_device.h>
943b0830	36	#include <linux/hwmon.h>
3659a017	37	#include <linux/hwmon-sysfs.h>
943b0830	38	#include <linux/err.h>
1da177e4	39	#include <linux/init.h>
9a61bf63	40	#include <linux/mutex.h>
b9acb64a	41	#include <linux/acpi.h>
6055fae8	42	#include <linux/io.h>
1da177e4	43
67b671bc JD	44	static unsigned short force_id;
	45	module_param(force_id, ushort, 0);
	46	MODULE_PARM_DESC(force_id, "Override the detected device ID");
	47
292fc1a5 JD	48	static struct platform_device *pdev;
	49
	50	#define DRVNAME "smsc47b397"
1da177e4 LT	51
	52	/* Super-I/0 registers and commands */
	53
	54	#define REG 0x2e /* The register to read/write */
	55	#define VAL 0x2f /* The value to read/write */
	56
	57	static inline void superio_outb(int reg, int val)
	58	{
	59	outb(reg, REG);
	60	outb(val, VAL);
	61	}
	62
	63	static inline int superio_inb(int reg)
	64	{
	65	outb(reg, REG);
	66	return inb(VAL);
	67	}
	68
	69	/* select superio logical device */
	70	static inline void superio_select(int ld)
	71	{
	72	superio_outb(0x07, ld);
	73	}
	74
	75	static inline void superio_enter(void)
	76	{
	77	outb(0x55, REG);
	78	}
	79
	80	static inline void superio_exit(void)
	81	{
	82	outb(0xAA, REG);
	83	}
	84
	85	#define SUPERIO_REG_DEVID 0x20
	86	#define SUPERIO_REG_DEVREV 0x21
	87	#define SUPERIO_REG_BASE_MSB 0x60
	88	#define SUPERIO_REG_BASE_LSB 0x61
	89	#define SUPERIO_REG_LD8 0x08
	90
	91	#define SMSC_EXTENT 0x02
	92
	93	/* 0 <= nr <= 3 */
	94	static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
	95	#define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)])
	96
	97	/* 0 <= nr <= 3 */
	98	#define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr))
	99	#define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))
	100
	101	struct smsc47b397_data {
292fc1a5 JD	102	unsigned short addr;
292fc1a5 JD	103	const char *name;
1beeffe4	104	struct device *hwmon_dev;
9a61bf63	105	struct mutex lock;
1da177e4	106
9a61bf63	107	struct mutex update_lock;
1da177e4 LT	108	unsigned long last_updated; /* in jiffies */
	109	int valid;
	110
	111	/* register values */
	112	u16 fan[4];
	113	u8 temp[4];
	114	};
	115
371f2e08	116	static int smsc47b397_read_value(struct smsc47b397_data *data, u8 reg)
1da177e4	117	{
1da177e4 LT	118	int res;
1da177e4 LT	119
9a61bf63	120	mutex_lock(&data->lock);
292fc1a5 JD	121	outb(reg, data->addr);
292fc1a5 JD	122	res = inb_p(data->addr + 1);
9a61bf63	123	mutex_unlock(&data->lock);
1da177e4 LT	124	return res;
	125	}
	126
	127	static struct smsc47b397_data smsc47b397_update_device(struct device dev)
	128	{
292fc1a5	129	struct smsc47b397_data *data = dev_get_drvdata(dev);
1da177e4 LT	130	int i;
1da177e4 LT	131
9a61bf63	132	mutex_lock(&data->update_lock);
1da177e4 LT	133
1da177e4 LT	134	if (time_after(jiffies, data->last_updated + HZ) \|\| !data->valid) {
292fc1a5	135	dev_dbg(dev, "starting device update...\n");
1da177e4 LT	136
	137	/* 4 temperature inputs, 4 fan inputs */
	138	for (i = 0; i < 4; i++) {
292fc1a5	139	data->temp[i] = smsc47b397_read_value(data,
1da177e4 LT	140	SMSC47B397_REG_TEMP(i));
	141
	142	/* must read LSB first */
292fc1a5	143	data->fan[i] = smsc47b397_read_value(data,
1da177e4	144	SMSC47B397_REG_FAN_LSB(i));
292fc1a5	145	data->fan[i] \|= smsc47b397_read_value(data,
1da177e4 LT	146	SMSC47B397_REG_FAN_MSB(i)) << 8;
	147	}
	148
	149	data->last_updated = jiffies;
	150	data->valid = 1;
	151
292fc1a5	152	dev_dbg(dev, "... device update complete\n");
1da177e4 LT	153	}
1da177e4 LT	154
9a61bf63	155	mutex_unlock(&data->update_lock);
1da177e4 LT	156
	157	return data;
	158	}
	159
2a52dd66 GR	160	/*
	161	* TEMP: 0.001C/bit (-128C to +127C)
	162	* REG: 1C/bit, two's complement
	163	*/
1da177e4 LT	164	static int temp_from_reg(u8 reg)
	165	{
	166	return (s8)reg * 1000;
	167	}
	168
3659a017 JD	169	static ssize_t show_temp(struct device *dev, struct device_attribute
3659a017 JD	170	devattr, char buf)
1da177e4	171	{
3659a017	172	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
1da177e4	173	struct smsc47b397_data *data = smsc47b397_update_device(dev);
3659a017	174	return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
1da177e4 LT	175	}
1da177e4 LT	176
3659a017 JD	177	static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
	178	static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
	179	static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
	180	static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
1da177e4	181
2a52dd66 GR	182	/*
	183	* FAN: 1 RPM/bit
	184	* REG: count of 90kHz pulses / revolution
	185	*/
1da177e4 LT	186	static int fan_from_reg(u16 reg)
1da177e4 LT	187	{
90205c6c JD	188	if (reg == 0 \|\| reg == 0xffff)
90205c6c JD	189	return 0;
1da177e4 LT	190	return 90000 * 60 / reg;
	191	}
	192
3659a017 JD	193	static ssize_t show_fan(struct device *dev, struct device_attribute
3659a017 JD	194	devattr, char buf)
1da177e4	195	{
3659a017 JD	196	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
	197	struct smsc47b397_data *data = smsc47b397_update_device(dev);
	198	return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
1da177e4	199	}
3659a017 JD	200	static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
	201	static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
	202	static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
	203	static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
1da177e4	204
292fc1a5 JD	205	static ssize_t show_name(struct device *dev, struct device_attribute
	206	devattr, char buf)
	207	{
	208	struct smsc47b397_data *data = dev_get_drvdata(dev);
	209	return sprintf(buf, "%s\n", data->name);
	210	}
	211	static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
	212
c1685f61	213	static struct attribute *smsc47b397_attributes[] = {
3659a017 JD	214	&sensor_dev_attr_temp1_input.dev_attr.attr,
	215	&sensor_dev_attr_temp2_input.dev_attr.attr,
	216	&sensor_dev_attr_temp3_input.dev_attr.attr,
	217	&sensor_dev_attr_temp4_input.dev_attr.attr,
	218	&sensor_dev_attr_fan1_input.dev_attr.attr,
	219	&sensor_dev_attr_fan2_input.dev_attr.attr,
	220	&sensor_dev_attr_fan3_input.dev_attr.attr,
	221	&sensor_dev_attr_fan4_input.dev_attr.attr,
c1685f61	222
292fc1a5	223	&dev_attr_name.attr,
c1685f61 MH	224	NULL
	225	};
	226
	227	static const struct attribute_group smsc47b397_group = {
	228	.attrs = smsc47b397_attributes,
	229	};
1da177e4	230
292fc1a5	231	static int __devexit smsc47b397_remove(struct platform_device *pdev)
1da177e4	232	{
292fc1a5 JD	233	struct smsc47b397_data *data = platform_get_drvdata(pdev);
292fc1a5 JD	234	struct resource *res;
1da177e4	235
1beeffe4	236	hwmon_device_unregister(data->hwmon_dev);
292fc1a5 JD	237	sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
	238	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	239	release_region(res->start, SMSC_EXTENT);
943b0830	240	kfree(data);
1da177e4 LT	241
	242	return 0;
	243	}
	244
292fc1a5	245	static int smsc47b397_probe(struct platform_device *pdev);
2d8672c5	246
292fc1a5	247	static struct platform_driver smsc47b397_driver = {
cdaf7934	248	.driver = {
87218842	249	.owner = THIS_MODULE,
292fc1a5	250	.name = DRVNAME,
cdaf7934	251	},
292fc1a5 JD	252	.probe = smsc47b397_probe,
292fc1a5 JD	253	.remove = __devexit_p(smsc47b397_remove),
1da177e4 LT	254	};
1da177e4 LT	255
292fc1a5	256	static int __devinit smsc47b397_probe(struct platform_device *pdev)
1da177e4	257	{
292fc1a5	258	struct device *dev = &pdev->dev;
1da177e4	259	struct smsc47b397_data *data;
292fc1a5	260	struct resource *res;
1da177e4 LT	261	int err = 0;
1da177e4 LT	262
292fc1a5 JD	263	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
292fc1a5 JD	264	if (!request_region(res->start, SMSC_EXTENT,
cdaf7934	265	smsc47b397_driver.driver.name)) {
292fc1a5 JD	266	dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
	267	(unsigned long)res->start,
	268	(unsigned long)res->start + SMSC_EXTENT - 1);
1da177e4 LT	269	return -EBUSY;
	270	}
	271
371f2e08 JD	272	data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL);
371f2e08 JD	273	if (!data) {
1da177e4 LT	274	err = -ENOMEM;
	275	goto error_release;
	276	}
1da177e4	277
292fc1a5 JD	278	data->addr = res->start;
292fc1a5 JD	279	data->name = "smsc47b397";
9a61bf63	280	mutex_init(&data->lock);
9a61bf63	281	mutex_init(&data->update_lock);
292fc1a5	282	platform_set_drvdata(pdev, data);
1da177e4	283
371f2e08 JD	284	err = sysfs_create_group(&dev->kobj, &smsc47b397_group);
371f2e08 JD	285	if (err)
1da177e4 LT	286	goto error_free;
1da177e4 LT	287
1beeffe4 TJ	288	data->hwmon_dev = hwmon_device_register(dev);
	289	if (IS_ERR(data->hwmon_dev)) {
	290	err = PTR_ERR(data->hwmon_dev);
c1685f61	291	goto error_remove;
943b0830 MH	292	}
943b0830 MH	293
1da177e4 LT	294	return 0;
1da177e4 LT	295
c1685f61	296	error_remove:
292fc1a5	297	sysfs_remove_group(&dev->kobj, &smsc47b397_group);
1da177e4	298	error_free:
1f57ff89	299	kfree(data);
1da177e4	300	error_release:
292fc1a5 JD	301	release_region(res->start, SMSC_EXTENT);
	302	return err;
	303	}
	304
	305	static int __init smsc47b397_device_add(unsigned short address)
	306	{
	307	struct resource res = {
	308	.start = address,
	309	.end = address + SMSC_EXTENT - 1,
	310	.name = DRVNAME,
	311	.flags = IORESOURCE_IO,
	312	};
	313	int err;
	314
b9acb64a JD	315	err = acpi_check_resource_conflict(&res);
	316	if (err)
	317	goto exit;
	318
292fc1a5 JD	319	pdev = platform_device_alloc(DRVNAME, address);
	320	if (!pdev) {
	321	err = -ENOMEM;
bf1a85ef	322	pr_err("Device allocation failed\n");
292fc1a5 JD	323	goto exit;
	324	}
	325
	326	err = platform_device_add_resources(pdev, &res, 1);
	327	if (err) {
bf1a85ef	328	pr_err("Device resource addition failed (%d)\n", err);
292fc1a5 JD	329	goto exit_device_put;
	330	}
	331
	332	err = platform_device_add(pdev);
	333	if (err) {
bf1a85ef	334	pr_err("Device addition failed (%d)\n", err);
292fc1a5 JD	335	goto exit_device_put;
	336	}
	337
	338	return 0;
	339
	340	exit_device_put:
	341	platform_device_put(pdev);
	342	exit:
1da177e4 LT	343	return err;
	344	}
	345
8528e07e	346	static int __init smsc47b397_find(void)
1da177e4 LT	347	{
1da177e4 LT	348	u8 id, rev;
80930776	349	char *name;
8528e07e	350	unsigned short addr;
1da177e4 LT	351
1da177e4 LT	352	superio_enter();
67b671bc	353	id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
1da177e4	354
371f2e08	355	switch (id) {
80930776 CK	356	case 0x81:
	357	name = "SCH5307-NS";
	358	break;
	359	case 0x6f:
	360	name = "LPC47B397-NC";
	361	break;
	362	case 0x85:
	363	case 0x8c:
	364	name = "SCH5317";
	365	break;
	366	default:
1da177e4 LT	367	superio_exit();
	368	return -ENODEV;
	369	}
	370
	371	rev = superio_inb(SUPERIO_REG_DEVREV);
	372
	373	superio_select(SUPERIO_REG_LD8);
8528e07e	374	addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
1da177e4 LT	375	\| superio_inb(SUPERIO_REG_BASE_LSB);
1da177e4 LT	376
bf1a85ef	377	pr_info("found SMSC %s (base address 0x%04x, revision %u)\n",
8528e07e	378	name, addr, rev);
1da177e4 LT	379
1da177e4 LT	380	superio_exit();
8528e07e	381	return addr;
1da177e4 LT	382	}
	383
	384	static int __init smsc47b397_init(void)
	385	{
292fc1a5	386	unsigned short address;
1da177e4 LT	387	int ret;
1da177e4 LT	388
8528e07e GR	389	ret = smsc47b397_find();
8528e07e GR	390	if (ret < 0)
1da177e4	391	return ret;
8528e07e	392	address = ret;
1da177e4	393
292fc1a5 JD	394	ret = platform_driver_register(&smsc47b397_driver);
	395	if (ret)
	396	goto exit;
	397
	398	/* Sets global pdev as a side effect */
	399	ret = smsc47b397_device_add(address);
	400	if (ret)
	401	goto exit_driver;
	402
	403	return 0;
	404
	405	exit_driver:
	406	platform_driver_unregister(&smsc47b397_driver);
	407	exit:
	408	return ret;
1da177e4 LT	409	}
	410
	411	static void __exit smsc47b397_exit(void)
	412	{
292fc1a5 JD	413	platform_device_unregister(pdev);
292fc1a5 JD	414	platform_driver_unregister(&smsc47b397_driver);
1da177e4 LT	415	}
	416
	417	MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
	418	MODULE_DESCRIPTION("SMSC LPC47B397 driver");
	419	MODULE_LICENSE("GPL");
	420
	421	module_init(smsc47b397_init);
	422	module_exit(smsc47b397_exit);