vt1211.c

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	SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
		show_temp, NULL, SHOW_TEMP_INPUT, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_input[] = {
	SENSOR_ATTR_TEMP_INPUT(1),
	SENSOR_ATTR_TEMP_INPUT(2),
	SENSOR_ATTR_TEMP_INPUT(3),
	SENSOR_ATTR_TEMP_INPUT(4),
	SENSOR_ATTR_TEMP_INPUT(5),
	SENSOR_ATTR_TEMP_INPUT(6),
	SENSOR_ATTR_TEMP_INPUT(7),
};

#define SENSOR_ATTR_TEMP_MAX(ix) \
	SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
		show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_max[] = {
	SENSOR_ATTR_TEMP_MAX(1),
	SENSOR_ATTR_TEMP_MAX(2),
	SENSOR_ATTR_TEMP_MAX(3),
	SENSOR_ATTR_TEMP_MAX(4),
	SENSOR_ATTR_TEMP_MAX(5),
	SENSOR_ATTR_TEMP_MAX(6),
	SENSOR_ATTR_TEMP_MAX(7),
};

#define SENSOR_ATTR_TEMP_MAX_HYST(ix) \
	SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
		show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_max_hyst[] = {
	SENSOR_ATTR_TEMP_MAX_HYST(1),
	SENSOR_ATTR_TEMP_MAX_HYST(2),
	SENSOR_ATTR_TEMP_MAX_HYST(3),
	SENSOR_ATTR_TEMP_MAX_HYST(4),
	SENSOR_ATTR_TEMP_MAX_HYST(5),
	SENSOR_ATTR_TEMP_MAX_HYST(6),
	SENSOR_ATTR_TEMP_MAX_HYST(7),
};

#define SENSOR_ATTR_TEMP_ALARM(ix) \
	SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
		show_temp, NULL, SHOW_TEMP_ALARM, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_temp_alarm[] = {
	SENSOR_ATTR_TEMP_ALARM(1),
	SENSOR_ATTR_TEMP_ALARM(2),
	SENSOR_ATTR_TEMP_ALARM(3),
	SENSOR_ATTR_TEMP_ALARM(4),
	SENSOR_ATTR_TEMP_ALARM(5),
	SENSOR_ATTR_TEMP_ALARM(6),
	SENSOR_ATTR_TEMP_ALARM(7),
};

#define SENSOR_ATTR_FAN(ix) \
	SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
		show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
	SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
		show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
	SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
		show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
	SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
		show_fan, NULL, SHOW_FAN_ALARM, ix-1)

#define SENSOR_ATTR_PWM(ix) \
	SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
		show_pwm, NULL, SHOW_PWM, ix-1), \
	SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
		show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
	SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
		show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)

#define SENSOR_ATTR_PWM_FREQ(ix) \
	SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
		show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)

#define SENSOR_ATTR_PWM_FREQ_RO(ix) \
	SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
		show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
		show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
		ap-1, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
		show_pwm_auto_point_temp, NULL, \
		ap-1, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
		show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
		ap-1, ix-1)

#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
	SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
		show_pwm_auto_point_pwm, NULL, \
		ap-1, ix-1)

static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
	SENSOR_ATTR_FAN(1),
	SENSOR_ATTR_FAN(2),
	SENSOR_ATTR_PWM(1),
	SENSOR_ATTR_PWM(2),
	SENSOR_ATTR_PWM_FREQ(1),
	SENSOR_ATTR_PWM_FREQ_RO(2),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
	SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
};

static struct device_attribute vt1211_sysfs_misc[] = {
	__ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
	__ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
	__ATTR(name, S_IRUGO, show_name, NULL),
	__ATTR(alarms, S_IRUGO, show_alarms, NULL),
};

/* ---------------------------------------------------------------------
 * Device registration and initialization
 * --------------------------------------------------------------------- */

static void __devinit vt1211_init_device(struct vt1211_data *data)
{
	/* set VRM */
	data->vrm = vid_which_vrm();

	/* Read (and initialize) UCH config */
	data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
	if (uch_config > -1) {
		data->uch_config = (data->uch_config & 0x83) |
				   (uch_config << 2);
		vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
	}

	/* Initialize the interrupt mode (if request at module load time).
	 * The VT1211 implements 3 different modes for clearing interrupts:
	 * 0: Clear INT when status register is read. Regenerate INT as long
	 *    as temp stays above hysteresis limit.
	 * 1: Clear INT when status register is read. DON'T regenerate INT
	 *    until temp falls below hysteresis limit and exceeds hot limit
	 *    again.
	 * 2: Clear INT when temp falls below max limit.
	 *
	 * The driver only allows to force mode 0 since that's the only one
	 * that makes sense for 'sensors' */
	if (int_mode == 0) {
		vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
		vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
	}

	/* Fill in some hard wired values into our data struct */
	data->pwm_auto_pwm[0][3] = 255;
	data->pwm_auto_pwm[1][3] = 255;
}

static void vt1211_remove_sysfs(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	int i;

	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
		device_remove_file(dev,
			&vt1211_sysfs_in_input[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_in_min[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_in_max[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_in_alarm[i].dev_attr);
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
		device_remove_file(dev,
			&vt1211_sysfs_temp_input[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_temp_max[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_temp_max_hyst[i].dev_attr);
		device_remove_file(dev,
			&vt1211_sysfs_temp_alarm[i].dev_attr);
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
		device_remove_file(dev,
			&vt1211_sysfs_fan_pwm[i].dev_attr);
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
		device_remove_file(dev, &vt1211_sysfs_misc[i]);
	}
}

static int __devinit vt1211_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct vt1211_data *data;
	struct resource *res;
	int i, err;

	if (!(data = kzalloc(sizeof(struct vt1211_data), GFP_KERNEL))) {
		err = -ENOMEM;
		dev_err(dev, "Out of memory\n");
		goto EXIT;
	}

	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) {
		err = -EBUSY;
		dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
			(unsigned long)res->start, (unsigned long)res->end);
		goto EXIT_KFREE;
	}
	data->addr = res->start;
	data->name = DRVNAME;
	mutex_init(&data->update_lock);

	platform_set_drvdata(pdev, data);

	/* Initialize the VT1211 chip */
	vt1211_init_device(data);

	/* Create sysfs interface files */
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
		if (ISVOLT(i, data->uch_config)) {
			if ((err = device_create_file(dev,
				&vt1211_sysfs_in_input[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_in_min[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_in_max[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_in_alarm[i].dev_attr))) {
				goto EXIT_DEV_REMOVE;
			}
		}
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
		if (ISTEMP(i, data->uch_config)) {
			if ((err = device_create_file(dev,
				&vt1211_sysfs_temp_input[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_temp_max[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_temp_max_hyst[i].dev_attr)) ||
			    (err = device_create_file(dev,
				&vt1211_sysfs_temp_alarm[i].dev_attr))) {
				goto EXIT_DEV_REMOVE;
			}
		}
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
		err = device_create_file(dev,
			&vt1211_sysfs_fan_pwm[i].dev_attr);
		if (err) {
			goto EXIT_DEV_REMOVE;
		}
	}
	for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
		err = device_create_file(dev,
		       &vt1211_sysfs_misc[i]);
		if (err) {
			goto EXIT_DEV_REMOVE;
		}
	}

	/* Register device */
	data->hwmon_dev = hwmon_device_register(dev);
	if (IS_ERR(data->hwmon_dev)) {
		err = PTR_ERR(data->hwmon_dev);
		dev_err(dev, "Class registration failed (%d)\n", err);
		goto EXIT_DEV_REMOVE_SILENT;
	}

	return 0;

EXIT_DEV_REMOVE:
	dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
EXIT_DEV_REMOVE_SILENT:
	vt1211_remove_sysfs(pdev);
	release_region(res->start, res->end - res->start + 1);
EXIT_KFREE:
	platform_set_drvdata(pdev, NULL);
	kfree(data);
EXIT:
	return err;
}

static int __devexit vt1211_remove(struct platform_device *pdev)
{
	struct vt1211_data *data = platform_get_drvdata(pdev);
	struct resource *res;

	hwmon_device_unregister(data->hwmon_dev);
	vt1211_remove_sysfs(pdev);
	platform_set_drvdata(pdev, NULL);
	kfree(data);

	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	release_region(res->start, res->end - res->start + 1);

	return 0;
}

static struct platform_driver vt1211_driver = {
	.driver = {
		.owner = THIS_MODULE,
		.name  = DRVNAME,
	},
	.probe  = vt1211_probe,
	.remove = __devexit_p(vt1211_remove),
};

static int __init vt1211_device_add(unsigned short address)
{
	struct resource res = {
		.start	= address,
		.end	= address + 0x7f,
		.flags	= IORESOURCE_IO,
	};
	int err;

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

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

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

	return 0;

EXIT_DEV_PUT:
	platform_device_put(pdev);
EXIT:
	return err;
}

static int __init vt1211_find(int sio_cip, unsigned short *address)
{
	int err = -ENODEV;

	superio_enter(sio_cip);

	if (superio_inb(sio_cip, SIO_VT1211_DEVID) != SIO_VT1211_ID) {
		goto EXIT;
	}

	superio_select(sio_cip, SIO_VT1211_LDN_HWMON);

	if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
		printk(KERN_WARNING DRVNAME ": HW monitor is disabled, "
		       "skipping\n");
		goto EXIT;
	}

	*address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
		    (superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
	if (*address == 0) {
		printk(KERN_WARNING DRVNAME ": Base address is not set, "
		       "skipping\n");
		goto EXIT;
	}

	err = 0;
	printk(KERN_INFO DRVNAME ": Found VT1211 chip at 0x%04x, "
	       "revision %u\n", *address,
	       superio_inb(sio_cip, SIO_VT1211_DEVREV));

EXIT:
	superio_exit(sio_cip);
	return err;
}

static int __init vt1211_init(void)
{
	int err;
	unsigned short address = 0;

	if ((err = vt1211_find(SIO_REG_CIP1, &address)) &&
	    (err = vt1211_find(SIO_REG_CIP2, &address))) {
		goto EXIT;
	}

	if ((uch_config < -1) || (uch_config > 31)) {
		err = -EINVAL;
		printk(KERN_WARNING DRVNAME ": Invalid UCH configuration %d. "
		       "Choose a value between 0 and 31.\n", uch_config);
	  goto EXIT;
	}

	if ((int_mode < -1) || (int_mode > 0)) {
		err = -EINVAL;
		printk(KERN_WARNING DRVNAME ": Invalid interrupt mode %d. "
		       "Only mode 0 is supported.\n", int_mode);
	  goto EXIT;
	}

	err = platform_driver_register(&vt1211_driver);
	if (err) {
		goto EXIT;
	}

	/* Sets global pdev as a side effect */
	err = vt1211_device_add(address);
	if (err) {
		goto EXIT_DRV_UNREGISTER;
	}

	return 0;

EXIT_DRV_UNREGISTER:
	platform_driver_unregister(&vt1211_driver);
EXIT:
	return err;
}

static void __exit vt1211_exit(void)
{
	platform_device_unregister(pdev);
	platform_driver_unregister(&vt1211_driver);
}

MODULE_AUTHOR("Juerg Haefliger <[e-mail]>");
MODULE_DESCRIPTION("VT1211 sensors");
MODULE_LICENSE("GPL");

module_init(vt1211_init);
module_exit(vt1211_exit);