applesmc.c

linux 内核源代码

 *  - show actual speed
 *  - show/store minimum speed
 *  - show maximum speed
 *  - show safe speed
 *  - show/store target speed
 *  - show/store manual mode
 */
#define sysfs_fan_speeds_offset(offset) \
static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
			applesmc_show_fan_speed, NULL, 0, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
	applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
			applesmc_show_fan_speed, NULL, 2, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
			applesmc_show_fan_speed, NULL, 3, offset-1); \
\
static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
	applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
\
static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
	applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
\
static SENSOR_DEVICE_ATTR(fan##offset##_label, S_IRUGO, \
	applesmc_show_fan_position, NULL, offset-1); \
\
static struct attribute *fan##offset##_attributes[] = { \
	&sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
	&sensor_dev_attr_fan##offset##_label.dev_attr.attr, \
	NULL \
};

/*
 * Create the needed functions for each fan using the macro defined above
 * (4 fans are supported)
 */
sysfs_fan_speeds_offset(1);
sysfs_fan_speeds_offset(2);
sysfs_fan_speeds_offset(3);
sysfs_fan_speeds_offset(4);

static const struct attribute_group fan_attribute_groups[] = {
	{ .attrs = fan1_attributes },
	{ .attrs = fan2_attributes },
	{ .attrs = fan3_attributes },
	{ .attrs = fan4_attributes },
};

/*
 * Temperature sensors sysfs entries.
 */
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
					applesmc_show_temperature, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
					applesmc_show_temperature, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
					applesmc_show_temperature, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
					applesmc_show_temperature, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
					applesmc_show_temperature, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
					applesmc_show_temperature, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
					applesmc_show_temperature, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
					applesmc_show_temperature, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
					applesmc_show_temperature, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
					applesmc_show_temperature, NULL, 9);
static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
					applesmc_show_temperature, NULL, 10);
static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
					applesmc_show_temperature, NULL, 11);
static SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO,
					applesmc_show_temperature, NULL, 12);
static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO,
					applesmc_show_temperature, NULL, 13);
static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO,
					applesmc_show_temperature, NULL, 14);
static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO,
					applesmc_show_temperature, NULL, 15);
static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO,
					applesmc_show_temperature, NULL, 16);
static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO,
					applesmc_show_temperature, NULL, 17);
static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO,
					applesmc_show_temperature, NULL, 18);
static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO,
					applesmc_show_temperature, NULL, 19);
static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO,
					applesmc_show_temperature, NULL, 20);
static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO,
					applesmc_show_temperature, NULL, 21);
static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO,
					applesmc_show_temperature, NULL, 22);
static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO,
					applesmc_show_temperature, NULL, 23);
static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO,
					applesmc_show_temperature, NULL, 24);
static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO,
					applesmc_show_temperature, NULL, 25);
static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO,
					applesmc_show_temperature, NULL, 26);
static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO,
					applesmc_show_temperature, NULL, 27);
static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO,
					applesmc_show_temperature, NULL, 28);
static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO,
					applesmc_show_temperature, NULL, 29);
static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO,
					applesmc_show_temperature, NULL, 30);
static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO,
					applesmc_show_temperature, NULL, 31);
static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO,
					applesmc_show_temperature, NULL, 32);
static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO,
					applesmc_show_temperature, NULL, 33);
static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO,
					applesmc_show_temperature, NULL, 34);

static struct attribute *temperature_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_temp5_input.dev_attr.attr,
	&sensor_dev_attr_temp6_input.dev_attr.attr,
	&sensor_dev_attr_temp7_input.dev_attr.attr,
	&sensor_dev_attr_temp8_input.dev_attr.attr,
	&sensor_dev_attr_temp9_input.dev_attr.attr,
	&sensor_dev_attr_temp10_input.dev_attr.attr,
	&sensor_dev_attr_temp11_input.dev_attr.attr,
	&sensor_dev_attr_temp12_input.dev_attr.attr,
	&sensor_dev_attr_temp13_input.dev_attr.attr,
	&sensor_dev_attr_temp14_input.dev_attr.attr,
	&sensor_dev_attr_temp15_input.dev_attr.attr,
	&sensor_dev_attr_temp16_input.dev_attr.attr,
	&sensor_dev_attr_temp17_input.dev_attr.attr,
	&sensor_dev_attr_temp18_input.dev_attr.attr,
	&sensor_dev_attr_temp19_input.dev_attr.attr,
	&sensor_dev_attr_temp20_input.dev_attr.attr,
	&sensor_dev_attr_temp21_input.dev_attr.attr,
	&sensor_dev_attr_temp22_input.dev_attr.attr,
	&sensor_dev_attr_temp23_input.dev_attr.attr,
	&sensor_dev_attr_temp24_input.dev_attr.attr,
	&sensor_dev_attr_temp25_input.dev_attr.attr,
	&sensor_dev_attr_temp26_input.dev_attr.attr,
	&sensor_dev_attr_temp27_input.dev_attr.attr,
	&sensor_dev_attr_temp28_input.dev_attr.attr,
	&sensor_dev_attr_temp29_input.dev_attr.attr,
	&sensor_dev_attr_temp30_input.dev_attr.attr,
	&sensor_dev_attr_temp31_input.dev_attr.attr,
	&sensor_dev_attr_temp32_input.dev_attr.attr,
	&sensor_dev_attr_temp33_input.dev_attr.attr,
	&sensor_dev_attr_temp34_input.dev_attr.attr,
	&sensor_dev_attr_temp35_input.dev_attr.attr,
	NULL
};

static const struct attribute_group temperature_attributes_group =
	{ .attrs = temperature_attributes };

/* Module stuff */

/*
 * applesmc_dmi_match - found a match.  return one, short-circuiting the hunt.
 */
static int applesmc_dmi_match(const struct dmi_system_id *id)
{
	int i = 0;
	struct dmi_match_data* dmi_data = id->driver_data;
	printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
	applesmc_accelerometer = dmi_data->accelerometer;
	printk(KERN_INFO "applesmc:  - Model %s accelerometer\n",
				applesmc_accelerometer ? "with" : "without");
	applesmc_light = dmi_data->light;
	printk(KERN_INFO "applesmc:  - Model %s light sensors and backlight\n",
					applesmc_light ? "with" : "without");

	applesmc_temperature_set =  dmi_data->temperature_set;
	while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
		i++;
	printk(KERN_INFO "applesmc:  - Model with %d temperature sensors\n", i);
	return 1;
}

/* Create accelerometer ressources */
static int applesmc_create_accelerometer(void)
{
	struct input_dev *idev;
	int ret;

	ret = sysfs_create_group(&pdev->dev.kobj,
					&accelerometer_attributes_group);
	if (ret)
		goto out;

	applesmc_idev = input_allocate_polled_device();
	if (!applesmc_idev) {
		ret = -ENOMEM;
		goto out_sysfs;
	}

	applesmc_idev->poll = applesmc_idev_poll;
	applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL;

	/* initial calibrate for the input device */
	applesmc_calibrate();

	/* initialize the input device */
	idev = applesmc_idev->input;
	idev->name = "applesmc";
	idev->id.bustype = BUS_HOST;
	idev->dev.parent = &pdev->dev;
	idev->evbit[0] = BIT_MASK(EV_ABS);
	input_set_abs_params(idev, ABS_X,
			-256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
	input_set_abs_params(idev, ABS_Y,
			-256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);

	ret = input_register_polled_device(applesmc_idev);
	if (ret)
		goto out_idev;

	return 0;

out_idev:
	input_free_polled_device(applesmc_idev);

out_sysfs:
	sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);

out:
	printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
	return ret;
}

/* Release all ressources used by the accelerometer */
static void applesmc_release_accelerometer(void)
{
	input_unregister_polled_device(applesmc_idev);
	input_free_polled_device(applesmc_idev);
	sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
}

static __initdata struct dmi_match_data applesmc_dmi_data[] = {
/* MacBook Pro: accelerometer, backlight and temperature set 0 */
	{ .accelerometer = 1, .light = 1, .temperature_set = 0 },
/* MacBook: accelerometer and temperature set 1 */
	{ .accelerometer = 1, .light = 0, .temperature_set = 1 },
/* MacMini: temperature set 2 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 2 },
/* MacPro: temperature set 3 */
	{ .accelerometer = 0, .light = 0, .temperature_set = 3 },
};

/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
 * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
static __initdata struct dmi_system_id applesmc_whitelist[] = {
	{ applesmc_dmi_match, "Apple MacBook Pro", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
		(void*)&applesmc_dmi_data[0]},
	{ applesmc_dmi_match, "Apple MacBook", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
		(void*)&applesmc_dmi_data[1]},
	{ applesmc_dmi_match, "Apple Macmini", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
		(void*)&applesmc_dmi_data[2]},
	{ applesmc_dmi_match, "Apple MacPro2", {
	  DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
	  DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") },
		(void*)&applesmc_dmi_data[3]},
	{ .ident = NULL }
};

static int __init applesmc_init(void)
{
	int ret;
	int count;
	int i;

	if (!dmi_check_system(applesmc_whitelist)) {
		printk(KERN_WARNING "applesmc: supported laptop not found!\n");
		ret = -ENODEV;
		goto out;
	}

	if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
								"applesmc")) {
		ret = -ENXIO;
		goto out;
	}

	ret = platform_driver_register(&applesmc_driver);
	if (ret)
		goto out_region;

	pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT,
					       NULL, 0);
	if (IS_ERR(pdev)) {
		ret = PTR_ERR(pdev);
		goto out_driver;
	}

	ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr);
	if (ret)
		goto out_device;

	/* Create key enumeration sysfs files */
	ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
	if (ret)
		goto out_name;

	/* create fan files */
	count = applesmc_get_fan_count();
	if (count < 0) {
		printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
	} else {
		printk(KERN_INFO "applesmc: %d fans found.\n", count);

		switch (count) {
		default:
			printk(KERN_WARNING "applesmc: More than 4 fans found,"
					" but at most 4 fans are supported"
						" by the driver.\n");
		case 4:
			ret = sysfs_create_group(&pdev->dev.kobj,
						 &fan_attribute_groups[3]);
			if (ret)
				goto out_key_enumeration;
		case 3:
			ret = sysfs_create_group(&pdev->dev.kobj,
						 &fan_attribute_groups[2]);
			if (ret)
				goto out_key_enumeration;
		case 2:
			ret = sysfs_create_group(&pdev->dev.kobj,
						 &fan_attribute_groups[1]);
			if (ret)
				goto out_key_enumeration;
		case 1:
			ret = sysfs_create_group(&pdev->dev.kobj,
						 &fan_attribute_groups[0]);
			if (ret)
				goto out_fan_1;
		case 0:
			;
		}
	}

	for (i = 0;
	     temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
	     i++) {
		if (temperature_attributes[i] == NULL) {
			printk(KERN_ERR "applesmc: More temperature sensors "
				"in temperature_sensors_sets (at least %i)"
				"than available sysfs files in "
				"temperature_attributes (%i), please report "
				"this bug.\n", i, i-1);
			goto out_temperature;
		}
		ret = sysfs_create_file(&pdev->dev.kobj,
						temperature_attributes[i]);
		if (ret)
			goto out_temperature;
	}

	if (applesmc_accelerometer) {
		ret = applesmc_create_accelerometer();
		if (ret)
			goto out_temperature;
	}

	if (applesmc_light) {
		/* Add light sensor file */
		ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
		if (ret)
			goto out_accelerometer;

		/* Create the workqueue */
		applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
		if (!applesmc_led_wq) {
			ret = -ENOMEM;
			goto out_light_sysfs;
		}

		/* register as a led device */
		ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
		if (ret < 0)
			goto out_light_wq;
	}

	hwmon_dev = hwmon_device_register(&pdev->dev);
	if (IS_ERR(hwmon_dev)) {
		ret = PTR_ERR(hwmon_dev);
		goto out_light_ledclass;
	}

	printk(KERN_INFO "applesmc: driver successfully loaded.\n");

	return 0;

out_light_ledclass:
	if (applesmc_light)
		led_classdev_unregister(&applesmc_backlight);
out_light_wq:
	if (applesmc_light)
		destroy_workqueue(applesmc_led_wq);
out_light_sysfs:
	if (applesmc_light)
		sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
out_accelerometer:
	if (applesmc_accelerometer)
		applesmc_release_accelerometer();
out_temperature:
	sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
out_fan_1:
	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
out_key_enumeration:
	sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
out_name:
	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
out_device:
	platform_device_unregister(pdev);
out_driver:
	platform_driver_unregister(&applesmc_driver);
out_region:
	release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
out:
	printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
	return ret;
}

static void __exit applesmc_exit(void)
{
	hwmon_device_unregister(hwmon_dev);
	if (applesmc_light) {
		led_classdev_unregister(&applesmc_backlight);
		destroy_workqueue(applesmc_led_wq);
		sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
	}
	if (applesmc_accelerometer)
		applesmc_release_accelerometer();
	sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
	sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
	sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr);
	platform_device_unregister(pdev);
	platform_driver_unregister(&applesmc_driver);
	release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);

	printk(KERN_INFO "applesmc: driver unloaded.\n");
}

module_init(applesmc_init);
module_exit(applesmc_exit);

MODULE_AUTHOR("Nicolas Boichat");
MODULE_DESCRIPTION("Apple SMC");
MODULE_LICENSE("GPL v2");