[mirror_ubuntu-bionic-kernel.git] / drivers / platform / x86 / dell-laptop.c

/*
 *  Driver for Dell laptop extras
 *
 *  Copyright (c) Red Hat <mjg@redhat.com>
 *
 *  Based on documentation in the libsmbios package, Copyright (C) 2005 Dell
 *  Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
#include <linux/err.h>
#include <linux/dmi.h>
#include <linux/io.h>
#include <linux/rfkill.h>
#include <linux/power_supply.h>
#include <linux/acpi.h>
#include <linux/mm.h>
#include <linux/i8042.h>
#include <linux/slab.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include "../../firmware/dcdbas.h"

#define BRIGHTNESS_TOKEN 0x7d

/* This structure will be modified by the firmware when we enter
 * system management mode, hence the volatiles */

struct calling_interface_buffer {
	u16 class;
	u16 select;
	volatile u32 input[4];
	volatile u32 output[4];
} __packed;

struct calling_interface_token {
	u16 tokenID;
	u16 location;
	union {
		u16 value;
		u16 stringlength;
	};
};

struct calling_interface_structure {
	struct dmi_header header;
	u16 cmdIOAddress;
	u8 cmdIOCode;
	u32 supportedCmds;
	struct calling_interface_token tokens[];
} __packed;

static int da_command_address;
static int da_command_code;
static int da_num_tokens;
static struct calling_interface_token *da_tokens;

static struct platform_driver platform_driver = {
	.driver = {
		.name = "dell-laptop",
		.owner = THIS_MODULE,
	}
};

static struct platform_device *platform_device;
static struct backlight_device *dell_backlight_device;
static struct rfkill *wifi_rfkill;
static struct rfkill *bluetooth_rfkill;
static struct rfkill *wwan_rfkill;

static const struct dmi_system_id __initdata dell_device_table[] = {
	{
		.ident = "Dell laptop",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
		},
	},
	{
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
		},
	},
	{
		.ident = "Dell Computer Corporation",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
			DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
		},
	},
	{ }
};

static struct dmi_system_id __devinitdata dell_blacklist[] = {
	/* Supported by compal-laptop */
	{
		.ident = "Dell Mini 9",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
		},
	},
	{
		.ident = "Dell Mini 10",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
		},
	},
	{
		.ident = "Dell Mini 10v",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
		},
	},
	{
		.ident = "Dell Mini 1012",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
		},
	},
	{
		.ident = "Dell Inspiron 11z",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
		},
	},
	{
		.ident = "Dell Mini 12",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
		},
	},
	{}
};

static struct calling_interface_buffer *buffer;
static struct page *bufferpage;
static DEFINE_MUTEX(buffer_mutex);

static int hwswitch_state;

static void get_buffer(void)
{
	mutex_lock(&buffer_mutex);
	memset(buffer, 0, sizeof(struct calling_interface_buffer));
}

static void release_buffer(void)
{
	mutex_unlock(&buffer_mutex);
}

static void __init parse_da_table(const struct dmi_header *dm)
{
	/* Final token is a terminator, so we don't want to copy it */
	int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
	struct calling_interface_structure *table =
		container_of(dm, struct calling_interface_structure, header);

	/* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
	   6 bytes of entry */

	if (dm->length < 17)
		return;

	da_command_address = table->cmdIOAddress;
	da_command_code = table->cmdIOCode;

	da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
			     sizeof(struct calling_interface_token),
			     GFP_KERNEL);

	if (!da_tokens)
		return;

	memcpy(da_tokens+da_num_tokens, table->tokens,
	       sizeof(struct calling_interface_token) * tokens);

	da_num_tokens += tokens;
}

static void __init find_tokens(const struct dmi_header *dm, void *dummy)
{
	switch (dm->type) {
	case 0xd4: /* Indexed IO */
		break;
	case 0xd5: /* Protected Area Type 1 */
		break;
	case 0xd6: /* Protected Area Type 2 */
		break;
	case 0xda: /* Calling interface */
		parse_da_table(dm);
		break;
	}
}

static int find_token_location(int tokenid)
{
	int i;
	for (i = 0; i < da_num_tokens; i++) {
		if (da_tokens[i].tokenID == tokenid)
			return da_tokens[i].location;
	}

	return -1;
}

static struct calling_interface_buffer *
dell_send_request(struct calling_interface_buffer *buffer, int class,
		  int select)
{
	struct smi_cmd command;

	command.magic = SMI_CMD_MAGIC;
	command.command_address = da_command_address;
	command.command_code = da_command_code;
	command.ebx = virt_to_phys(buffer);
	command.ecx = 0x42534931;

	buffer->class = class;
	buffer->select = select;

	dcdbas_smi_request(&command);

	return buffer;
}

/* Derived from information in DellWirelessCtl.cpp:
   Class 17, select 11 is radio control. It returns an array of 32-bit values.

   Input byte 0 = 0: Wireless information

   result[0]: return code
   result[1]:
     Bit 0:      Hardware switch supported
     Bit 1:      Wifi locator supported
     Bit 2:      Wifi is supported
     Bit 3:      Bluetooth is supported
     Bit 4:      WWAN is supported
     Bit 5:      Wireless keyboard supported
     Bits 6-7:   Reserved
     Bit 8:      Wifi is installed
     Bit 9:      Bluetooth is installed
     Bit 10:     WWAN is installed
     Bits 11-15: Reserved
     Bit 16:     Hardware switch is on
     Bit 17:     Wifi is blocked
     Bit 18:     Bluetooth is blocked
     Bit 19:     WWAN is blocked
     Bits 20-31: Reserved
   result[2]: NVRAM size in bytes
   result[3]: NVRAM format version number

   Input byte 0 = 2: Wireless switch configuration
   result[0]: return code
   result[1]:
     Bit 0:      Wifi controlled by switch
     Bit 1:      Bluetooth controlled by switch
     Bit 2:      WWAN controlled by switch
     Bits 3-6:   Reserved
     Bit 7:      Wireless switch config locked
     Bit 8:      Wifi locator enabled
     Bits 9-14:  Reserved
     Bit 15:     Wifi locator setting locked
     Bits 16-31: Reserved
*/

static int dell_rfkill_set(void *data, bool blocked)
{
	int disable = blocked ? 1 : 0;
	unsigned long radio = (unsigned long)data;
	int hwswitch_bit = (unsigned long)data - 1;
	int ret = 0;

	get_buffer();
	dell_send_request(buffer, 17, 11);

	/* If the hardware switch controls this radio, and the hardware
	   switch is disabled, don't allow changing the software state */
	if ((hwswitch_state & BIT(hwswitch_bit)) &&
	    !(buffer->output[1] & BIT(16))) {
		ret = -EINVAL;
		goto out;
	}

	buffer->input[0] = (1 | (radio<<8) | (disable << 16));
	dell_send_request(buffer, 17, 11);

out:
	release_buffer();
	return ret;
}

static void dell_rfkill_query(struct rfkill *rfkill, void *data)
{
	int status;
	int bit = (unsigned long)data + 16;
	int hwswitch_bit = (unsigned long)data - 1;

	get_buffer();
	dell_send_request(buffer, 17, 11);
	status = buffer->output[1];
	release_buffer();

	rfkill_set_sw_state(rfkill, !!(status & BIT(bit)));

	if (hwswitch_state & (BIT(hwswitch_bit)))
		rfkill_set_hw_state(rfkill, !(status & BIT(16)));
}

static const struct rfkill_ops dell_rfkill_ops = {
	.set_block = dell_rfkill_set,
	.query = dell_rfkill_query,
};

static struct dentry *dell_laptop_dir;

static int dell_debugfs_show(struct seq_file *s, void *data)
{
	int status;

	get_buffer();
	dell_send_request(buffer, 17, 11);
	status = buffer->output[1];
	release_buffer();

	seq_printf(s, "status:\t0x%X\n", status);
	seq_printf(s, "Bit 0 : Hardware switch supported:   %lu\n",
		   status & BIT(0));
	seq_printf(s, "Bit 1 : Wifi locator supported:      %lu\n",
		  (status & BIT(1)) >> 1);
	seq_printf(s, "Bit 2 : Wifi is supported:           %lu\n",
		  (status & BIT(2)) >> 2);
	seq_printf(s, "Bit 3 : Bluetooth is supported:      %lu\n",
		  (status & BIT(3)) >> 3);
	seq_printf(s, "Bit 4 : WWAN is supported:           %lu\n",
		  (status & BIT(4)) >> 4);
	seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
		  (status & BIT(5)) >> 5);
	seq_printf(s, "Bit 8 : Wifi is installed:           %lu\n",
		  (status & BIT(8)) >> 8);
	seq_printf(s, "Bit 9 : Bluetooth is installed:      %lu\n",
		  (status & BIT(9)) >> 9);
	seq_printf(s, "Bit 10: WWAN is installed:           %lu\n",
		  (status & BIT(10)) >> 10);
	seq_printf(s, "Bit 16: Hardware switch is on:       %lu\n",
		  (status & BIT(16)) >> 16);
	seq_printf(s, "Bit 17: Wifi is blocked:             %lu\n",
		  (status & BIT(17)) >> 17);
	seq_printf(s, "Bit 18: Bluetooth is blocked:        %lu\n",
		  (status & BIT(18)) >> 18);
	seq_printf(s, "Bit 19: WWAN is blocked:             %lu\n",
		  (status & BIT(19)) >> 19);

	seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
	seq_printf(s, "Bit 0 : Wifi controlled by switch:      %lu\n",
		   hwswitch_state & BIT(0));
	seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
		   (hwswitch_state & BIT(1)) >> 1);
	seq_printf(s, "Bit 2 : WWAN controlled by switch:      %lu\n",
		   (hwswitch_state & BIT(2)) >> 2);
	seq_printf(s, "Bit 7 : Wireless switch config locked:  %lu\n",
		   (hwswitch_state & BIT(7)) >> 7);
	seq_printf(s, "Bit 8 : Wifi locator enabled:           %lu\n",
		   (hwswitch_state & BIT(8)) >> 8);
	seq_printf(s, "Bit 15: Wifi locator setting locked:    %lu\n",
		   (hwswitch_state & BIT(15)) >> 15);

	return 0;
}

static int dell_debugfs_open(struct inode *inode, struct file *file)
{
	return single_open(file, dell_debugfs_show, inode->i_private);
}

static const struct file_operations dell_debugfs_fops = {
	.owner = THIS_MODULE,
	.open = dell_debugfs_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static void dell_update_rfkill(struct work_struct *ignored)
{
	if (wifi_rfkill)
		dell_rfkill_query(wifi_rfkill, (void *)1);
	if (bluetooth_rfkill)
		dell_rfkill_query(bluetooth_rfkill, (void *)2);
	if (wwan_rfkill)
		dell_rfkill_query(wwan_rfkill, (void *)3);
}
static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);


static int __init dell_setup_rfkill(void)
{
	int status;
	int ret;

	if (dmi_check_system(dell_blacklist)) {
		pr_info("Blacklisted hardware detected - not enabling rfkill\n");
		return 0;
	}

	get_buffer();
	dell_send_request(buffer, 17, 11);
	status = buffer->output[1];
	buffer->input[0] = 0x2;
	dell_send_request(buffer, 17, 11);
	hwswitch_state = buffer->output[1];
	release_buffer();

	if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
		wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
					   RFKILL_TYPE_WLAN,
					   &dell_rfkill_ops, (void *) 1);
		if (!wifi_rfkill) {
			ret = -ENOMEM;
			goto err_wifi;
		}
		ret = rfkill_register(wifi_rfkill);
		if (ret)
			goto err_wifi;
	}

	if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
		bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
						&platform_device->dev,
						RFKILL_TYPE_BLUETOOTH,
						&dell_rfkill_ops, (void *) 2);
		if (!bluetooth_rfkill) {
			ret = -ENOMEM;
			goto err_bluetooth;
		}
		ret = rfkill_register(bluetooth_rfkill);
		if (ret)
			goto err_bluetooth;
	}

	if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
		wwan_rfkill = rfkill_alloc("dell-wwan",
					   &platform_device->dev,
					   RFKILL_TYPE_WWAN,
					   &dell_rfkill_ops, (void *) 3);
		if (!wwan_rfkill) {
			ret = -ENOMEM;
			goto err_wwan;
		}
		ret = rfkill_register(wwan_rfkill);
		if (ret)
			goto err_wwan;
	}

	return 0;
err_wwan:
	rfkill_destroy(wwan_rfkill);
	if (bluetooth_rfkill)
		rfkill_unregister(bluetooth_rfkill);
err_bluetooth:
	rfkill_destroy(bluetooth_rfkill);
	if (wifi_rfkill)
		rfkill_unregister(wifi_rfkill);
err_wifi:
	rfkill_destroy(wifi_rfkill);

	return ret;
}

static void dell_cleanup_rfkill(void)
{
	if (wifi_rfkill) {
		rfkill_unregister(wifi_rfkill);
		rfkill_destroy(wifi_rfkill);
	}
	if (bluetooth_rfkill) {
		rfkill_unregister(bluetooth_rfkill);
		rfkill_destroy(bluetooth_rfkill);
	}
	if (wwan_rfkill) {
		rfkill_unregister(wwan_rfkill);
		rfkill_destroy(wwan_rfkill);
	}
}

static int dell_send_intensity(struct backlight_device *bd)
{
	int ret = 0;

	get_buffer();
	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	buffer->input[1] = bd->props.brightness;

	if (buffer->input[0] == -1) {
		ret = -ENODEV;
		goto out;
	}

	if (power_supply_is_system_supplied() > 0)
		dell_send_request(buffer, 1, 2);
	else
		dell_send_request(buffer, 1, 1);

out:
	release_buffer();
	return 0;
}

static int dell_get_intensity(struct backlight_device *bd)
{
	int ret = 0;

	get_buffer();
	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);

	if (buffer->input[0] == -1) {
		ret = -ENODEV;
		goto out;
	}

	if (power_supply_is_system_supplied() > 0)
		dell_send_request(buffer, 0, 2);
	else
		dell_send_request(buffer, 0, 1);

out:
	release_buffer();
	if (ret)
		return ret;
	return buffer->output[1];
}

static const struct backlight_ops dell_ops = {
	.get_brightness = dell_get_intensity,
	.update_status  = dell_send_intensity,
};

static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
			      struct serio *port)
{
	static bool extended;

	if (str & 0x20)
		return false;

	if (unlikely(data == 0xe0)) {
		extended = true;
		return false;
	} else if (unlikely(extended)) {
		switch (data) {
		case 0x8:
			schedule_delayed_work(&dell_rfkill_work,
					      round_jiffies_relative(HZ));
			break;
		}
		extended = false;
	}

	return false;
}

static int __init dell_init(void)
{
	int max_intensity = 0;
	int ret;

	if (!dmi_check_system(dell_device_table))
		return -ENODEV;

	dmi_walk(find_tokens, NULL);

	if (!da_tokens)  {
		pr_info("Unable to find dmi tokens\n");
		return -ENODEV;
	}

	ret = platform_driver_register(&platform_driver);
	if (ret)
		goto fail_platform_driver;
	platform_device = platform_device_alloc("dell-laptop", -1);
	if (!platform_device) {
		ret = -ENOMEM;
		goto fail_platform_device1;
	}
	ret = platform_device_add(platform_device);
	if (ret)
		goto fail_platform_device2;

	/*
	 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
	 * is passed to SMI handler.
	 */
	bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32);

	if (!bufferpage)
		goto fail_buffer;
	buffer = page_address(bufferpage);
	mutex_init(&buffer_mutex);

	ret = dell_setup_rfkill();

	if (ret) {
		pr_warn("Unable to setup rfkill\n");
		goto fail_rfkill;
	}

	ret = i8042_install_filter(dell_laptop_i8042_filter);
	if (ret) {
		pr_warn("Unable to install key filter\n");
		goto fail_filter;
	}

	dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
	if (dell_laptop_dir != NULL)
		debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
				    &dell_debugfs_fops);

#ifdef CONFIG_ACPI
	/* In the event of an ACPI backlight being available, don't
	 * register the platform controller.
	 */
	if (acpi_video_backlight_support())
		return 0;
#endif

	get_buffer();
	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	if (buffer->input[0] != -1) {
		dell_send_request(buffer, 0, 2);
		max_intensity = buffer->output[3];
	}
	release_buffer();

	if (max_intensity) {
		struct backlight_properties props;
		memset(&props, 0, sizeof(struct backlight_properties));
		props.type = BACKLIGHT_PLATFORM;
		props.max_brightness = max_intensity;
		dell_backlight_device = backlight_device_register("dell_backlight",
								  &platform_device->dev,
								  NULL,
								  &dell_ops,
								  &props);

		if (IS_ERR(dell_backlight_device)) {
			ret = PTR_ERR(dell_backlight_device);
			dell_backlight_device = NULL;
			goto fail_backlight;
		}

		dell_backlight_device->props.brightness =
			dell_get_intensity(dell_backlight_device);
		backlight_update_status(dell_backlight_device);
	}

	return 0;

fail_backlight:
	i8042_remove_filter(dell_laptop_i8042_filter);
	cancel_delayed_work_sync(&dell_rfkill_work);
fail_filter:
	dell_cleanup_rfkill();
fail_rfkill:
	free_page((unsigned long)bufferpage);
fail_buffer:
	platform_device_del(platform_device);
fail_platform_device2:
	platform_device_put(platform_device);
fail_platform_device1:
	platform_driver_unregister(&platform_driver);
fail_platform_driver:
	kfree(da_tokens);
	return ret;
}

static void __exit dell_exit(void)
{
	debugfs_remove_recursive(dell_laptop_dir);
	i8042_remove_filter(dell_laptop_i8042_filter);
	cancel_delayed_work_sync(&dell_rfkill_work);
	backlight_device_unregister(dell_backlight_device);
	dell_cleanup_rfkill();
	if (platform_device) {
		platform_device_unregister(platform_device);
		platform_driver_unregister(&platform_driver);
	}
	kfree(da_tokens);
	free_page((unsigned long)buffer);
}

module_init(dell_init);
module_exit(dell_exit);

MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
MODULE_DESCRIPTION("Dell laptop driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("dmi:*svnDellInc.:*:ct8:*");
MODULE_ALIAS("dmi:*svnDellInc.:*:ct9:*");
MODULE_ALIAS("dmi:*svnDellComputerCorporation.:*:ct8:*");
Commit	Line	Data
ad8f07cc MG	1	/*
	2	* Driver for Dell laptop extras
	3	*
	4	* Copyright (c) Red Hat <mjg@redhat.com>
	5	*
	6	* Based on documentation in the libsmbios package, Copyright (C) 2005 Dell
	7	* Inc.
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
eb889524 JP	14	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
eb889524 JP	15
ad8f07cc MG	16	#include <linux/module.h>
	17	#include <linux/kernel.h>
	18	#include <linux/init.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/backlight.h>
	21	#include <linux/err.h>
	22	#include <linux/dmi.h>
	23	#include <linux/io.h>
	24	#include <linux/rfkill.h>
	25	#include <linux/power_supply.h>
	26	#include <linux/acpi.h>
116ee77b	27	#include <linux/mm.h>
814cb8ad	28	#include <linux/i8042.h>
5a0e3ad6	29	#include <linux/slab.h>
037accfa KYL	30	#include <linux/debugfs.h>
037accfa KYL	31	#include <linux/seq_file.h>
cad73120	32	#include "../../firmware/dcdbas.h"
ad8f07cc MG	33
	34	#define BRIGHTNESS_TOKEN 0x7d
	35
	36	/* This structure will be modified by the firmware when we enter
	37	* system management mode, hence the volatiles */
	38
	39	struct calling_interface_buffer {
	40	u16 class;
	41	u16 select;
	42	volatile u32 input[4];
	43	volatile u32 output[4];
	44	} __packed;
	45
	46	struct calling_interface_token {
	47	u16 tokenID;
	48	u16 location;
	49	union {
	50	u16 value;
	51	u16 stringlength;
	52	};
	53	};
	54
	55	struct calling_interface_structure {
	56	struct dmi_header header;
	57	u16 cmdIOAddress;
	58	u8 cmdIOCode;
	59	u32 supportedCmds;
	60	struct calling_interface_token tokens[];
	61	} __packed;
	62
	63	static int da_command_address;
	64	static int da_command_code;
	65	static int da_num_tokens;
	66	static struct calling_interface_token *da_tokens;
	67
ada3248a AJ	68	static struct platform_driver platform_driver = {
	69	.driver = {
	70	.name = "dell-laptop",
	71	.owner = THIS_MODULE,
	72	}
	73	};
	74
	75	static struct platform_device *platform_device;
ad8f07cc MG	76	static struct backlight_device *dell_backlight_device;
	77	static struct rfkill *wifi_rfkill;
	78	static struct rfkill *bluetooth_rfkill;
	79	static struct rfkill *wwan_rfkill;
	80
	81	static const struct dmi_system_id __initdata dell_device_table[] = {
	82	{
	83	.ident = "Dell laptop",
	84	.matches = {
	85	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	86	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
	87	},
	88	},
410d44c7 RK	89	{
	90	.matches = {
	91	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	92	DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /Laptop/
	93	},
	94	},
cb6a7937 EA	95	{
	96	.ident = "Dell Computer Corporation",
	97	.matches = {
	98	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
	99	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
	100	},
	101	},
ad8f07cc MG	102	{ }
	103	};
	104
e5fefd0c ML	105	static struct dmi_system_id __devinitdata dell_blacklist[] = {
	106	/* Supported by compal-laptop */
	107	{
	108	.ident = "Dell Mini 9",
	109	.matches = {
	110	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	111	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
	112	},
	113	},
	114	{
	115	.ident = "Dell Mini 10",
	116	.matches = {
	117	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	118	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
	119	},
	120	},
	121	{
	122	.ident = "Dell Mini 10v",
	123	.matches = {
	124	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	125	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
	126	},
	127	},
c3f755e3 VE	128	{
	129	.ident = "Dell Mini 1012",
	130	.matches = {
	131	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	132	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
	133	},
	134	},
e5fefd0c ML	135	{
	136	.ident = "Dell Inspiron 11z",
	137	.matches = {
	138	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	139	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
	140	},
	141	},
	142	{
	143	.ident = "Dell Mini 12",
	144	.matches = {
	145	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	146	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
	147	},
	148	},
	149	{}
	150	};
	151
116ee77b	152	static struct calling_interface_buffer *buffer;
94d8f785 IM	153	static struct page *bufferpage;
94d8f785 IM	154	static DEFINE_MUTEX(buffer_mutex);
116ee77b	155
c6760ac4 MG	156	static int hwswitch_state;
c6760ac4 MG	157
116ee77b SH	158	static void get_buffer(void)
	159	{
	160	mutex_lock(&buffer_mutex);
	161	memset(buffer, 0, sizeof(struct calling_interface_buffer));
	162	}
	163
	164	static void release_buffer(void)
	165	{
	166	mutex_unlock(&buffer_mutex);
	167	}
	168
4788df4c	169	static void __init parse_da_table(const struct dmi_header *dm)
ad8f07cc MG	170	{
	171	/* Final token is a terminator, so we don't want to copy it */
	172	int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
	173	struct calling_interface_structure *table =
	174	container_of(dm, struct calling_interface_structure, header);
	175
	176	/* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
	177	6 bytes of entry */
	178
	179	if (dm->length < 17)
	180	return;
	181
	182	da_command_address = table->cmdIOAddress;
	183	da_command_code = table->cmdIOCode;
	184
	185	da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
	186	sizeof(struct calling_interface_token),
	187	GFP_KERNEL);
	188
	189	if (!da_tokens)
	190	return;
	191
	192	memcpy(da_tokens+da_num_tokens, table->tokens,
	193	sizeof(struct calling_interface_token) * tokens);
	194
	195	da_num_tokens += tokens;
	196	}
	197
4788df4c	198	static void __init find_tokens(const struct dmi_header dm, void dummy)
ad8f07cc MG	199	{
	200	switch (dm->type) {
	201	case 0xd4: /* Indexed IO */
	202	break;
	203	case 0xd5: /* Protected Area Type 1 */
	204	break;
	205	case 0xd6: /* Protected Area Type 2 */
	206	break;
	207	case 0xda: /* Calling interface */
	208	parse_da_table(dm);
	209	break;
	210	}
	211	}
	212
	213	static int find_token_location(int tokenid)
	214	{
	215	int i;
	216	for (i = 0; i < da_num_tokens; i++) {
	217	if (da_tokens[i].tokenID == tokenid)
	218	return da_tokens[i].location;
	219	}
	220
	221	return -1;
	222	}
	223
	224	static struct calling_interface_buffer *
	225	dell_send_request(struct calling_interface_buffer *buffer, int class,
	226	int select)
	227	{
	228	struct smi_cmd command;
	229
	230	command.magic = SMI_CMD_MAGIC;
	231	command.command_address = da_command_address;
	232	command.command_code = da_command_code;
	233	command.ebx = virt_to_phys(buffer);
	234	command.ecx = 0x42534931;
	235
	236	buffer->class = class;
	237	buffer->select = select;
	238
	239	dcdbas_smi_request(&command);
	240
	241	return buffer;
	242	}
	243
	244	/* Derived from information in DellWirelessCtl.cpp:
	245	Class 17, select 11 is radio control. It returns an array of 32-bit values.
	246
c6760ac4 MG	247	Input byte 0 = 0: Wireless information
c6760ac4 MG	248
ad8f07cc MG	249	result[0]: return code
	250	result[1]:
	251	Bit 0: Hardware switch supported
	252	Bit 1: Wifi locator supported
	253	Bit 2: Wifi is supported
	254	Bit 3: Bluetooth is supported
	255	Bit 4: WWAN is supported
	256	Bit 5: Wireless keyboard supported
	257	Bits 6-7: Reserved
	258	Bit 8: Wifi is installed
	259	Bit 9: Bluetooth is installed
	260	Bit 10: WWAN is installed
	261	Bits 11-15: Reserved
	262	Bit 16: Hardware switch is on
	263	Bit 17: Wifi is blocked
	264	Bit 18: Bluetooth is blocked
	265	Bit 19: WWAN is blocked
	266	Bits 20-31: Reserved
	267	result[2]: NVRAM size in bytes
	268	result[3]: NVRAM format version number
c6760ac4 MG	269
	270	Input byte 0 = 2: Wireless switch configuration
	271	result[0]: return code
	272	result[1]:
	273	Bit 0: Wifi controlled by switch
	274	Bit 1: Bluetooth controlled by switch
	275	Bit 2: WWAN controlled by switch
	276	Bits 3-6: Reserved
	277	Bit 7: Wireless switch config locked
	278	Bit 8: Wifi locator enabled
	279	Bits 9-14: Reserved
	280	Bit 15: Wifi locator setting locked
	281	Bits 16-31: Reserved
ad8f07cc MG	282	*/
ad8f07cc MG	283
19d337df	284	static int dell_rfkill_set(void *data, bool blocked)
ad8f07cc	285	{
624f0de4	286	int disable = blocked ? 1 : 0;
19d337df	287	unsigned long radio = (unsigned long)data;
c6760ac4	288	int hwswitch_bit = (unsigned long)data - 1;
116ee77b	289	int ret = 0;
ad8f07cc	290
116ee77b SH	291	get_buffer();
116ee77b SH	292	dell_send_request(buffer, 17, 11);
ec1722a2	293
c6760ac4	294	/* If the hardware switch controls this radio, and the hardware
be65dde8	295	switch is disabled, don't allow changing the software state */
c6760ac4	296	if ((hwswitch_state & BIT(hwswitch_bit)) &&
be65dde8	297	!(buffer->output[1] & BIT(16))) {
116ee77b SH	298	ret = -EINVAL;
	299	goto out;
	300	}
ad8f07cc	301
116ee77b SH	302	buffer->input[0] = (1 \| (radio<<8) \| (disable << 16));
	303	dell_send_request(buffer, 17, 11);
	304
	305	out:
	306	release_buffer();
	307	return ret;
ad8f07cc MG	308	}
ad8f07cc MG	309
19d337df	310	static void dell_rfkill_query(struct rfkill rfkill, void data)
ad8f07cc	311	{
ad8f07cc	312	int status;
19d337df	313	int bit = (unsigned long)data + 16;
c6760ac4	314	int hwswitch_bit = (unsigned long)data - 1;
ad8f07cc	315
116ee77b SH	316	get_buffer();
	317	dell_send_request(buffer, 17, 11);
	318	status = buffer->output[1];
	319	release_buffer();
ad8f07cc	320
e1fbf346	321	rfkill_set_sw_state(rfkill, !!(status & BIT(bit)));
c6760ac4 MG	322
	323	if (hwswitch_state & (BIT(hwswitch_bit)))
	324	rfkill_set_hw_state(rfkill, !(status & BIT(16)));
ad8f07cc MG	325	}
ad8f07cc MG	326
19d337df JB	327	static const struct rfkill_ops dell_rfkill_ops = {
	328	.set_block = dell_rfkill_set,
	329	.query = dell_rfkill_query,
	330	};
ad8f07cc	331
037accfa KYL	332	static struct dentry *dell_laptop_dir;
	333
	334	static int dell_debugfs_show(struct seq_file s, void data)
	335	{
	336	int status;
	337
	338	get_buffer();
	339	dell_send_request(buffer, 17, 11);
	340	status = buffer->output[1];
	341	release_buffer();
	342
	343	seq_printf(s, "status:\t0x%X\n", status);
	344	seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
	345	status & BIT(0));
	346	seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
	347	(status & BIT(1)) >> 1);
	348	seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
	349	(status & BIT(2)) >> 2);
	350	seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
	351	(status & BIT(3)) >> 3);
	352	seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
	353	(status & BIT(4)) >> 4);
	354	seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
	355	(status & BIT(5)) >> 5);
	356	seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
	357	(status & BIT(8)) >> 8);
	358	seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
	359	(status & BIT(9)) >> 9);
	360	seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
	361	(status & BIT(10)) >> 10);
	362	seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
	363	(status & BIT(16)) >> 16);
	364	seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
	365	(status & BIT(17)) >> 17);
	366	seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
	367	(status & BIT(18)) >> 18);
	368	seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
	369	(status & BIT(19)) >> 19);
	370
	371	seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
	372	seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
	373	hwswitch_state & BIT(0));
	374	seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
	375	(hwswitch_state & BIT(1)) >> 1);
	376	seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
	377	(hwswitch_state & BIT(2)) >> 2);
	378	seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
	379	(hwswitch_state & BIT(7)) >> 7);
	380	seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
	381	(hwswitch_state & BIT(8)) >> 8);
	382	seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
	383	(hwswitch_state & BIT(15)) >> 15);
	384
	385	return 0;
	386	}
	387
	388	static int dell_debugfs_open(struct inode inode, struct file file)
	389	{
	390	return single_open(file, dell_debugfs_show, inode->i_private);
	391	}
	392
	393	static const struct file_operations dell_debugfs_fops = {
	394	.owner = THIS_MODULE,
	395	.open = dell_debugfs_open,
396	.read = seq_read,
397	.llseek = seq_lseek,
398	.release = single_release,
399	};
400
814cb8ad MG	401	static void dell_update_rfkill(struct work_struct *ignored)
	402	{
	403	if (wifi_rfkill)
	404	dell_rfkill_query(wifi_rfkill, (void *)1);
	405	if (bluetooth_rfkill)
	406	dell_rfkill_query(bluetooth_rfkill, (void *)2);
	407	if (wwan_rfkill)
	408	dell_rfkill_query(wwan_rfkill, (void *)3);
	409	}
	410	static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
	411
	412
4788df4c	413	static int __init dell_setup_rfkill(void)
ad8f07cc	414	{
ad8f07cc MG	415	int status;
	416	int ret;
	417
e5fefd0c	418	if (dmi_check_system(dell_blacklist)) {
eb889524	419	pr_info("Blacklisted hardware detected - not enabling rfkill\n");
e5fefd0c ML	420	return 0;
	421	}
	422
116ee77b SH	423	get_buffer();
	424	dell_send_request(buffer, 17, 11);
	425	status = buffer->output[1];
c6760ac4 MG	426	buffer->input[0] = 0x2;
	427	dell_send_request(buffer, 17, 11);
	428	hwswitch_state = buffer->output[1];
116ee77b	429	release_buffer();
ad8f07cc MG	430
ad8f07cc MG	431	if ((status & (1<<2\|1<<8)) == (1<<2\|1<<8)) {
ada3248a AJ	432	wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
ada3248a AJ	433	RFKILL_TYPE_WLAN,
19d337df JB	434	&dell_rfkill_ops, (void *) 1);
	435	if (!wifi_rfkill) {
	436	ret = -ENOMEM;
ad8f07cc	437	goto err_wifi;
19d337df	438	}
ad8f07cc MG	439	ret = rfkill_register(wifi_rfkill);
	440	if (ret)
	441	goto err_wifi;
	442	}
	443
	444	if ((status & (1<<3\|1<<9)) == (1<<3\|1<<9)) {
ada3248a AJ	445	bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
ada3248a AJ	446	&platform_device->dev,
19d337df JB	447	RFKILL_TYPE_BLUETOOTH,
	448	&dell_rfkill_ops, (void *) 2);
	449	if (!bluetooth_rfkill) {
	450	ret = -ENOMEM;
ad8f07cc	451	goto err_bluetooth;
19d337df	452	}
ad8f07cc MG	453	ret = rfkill_register(bluetooth_rfkill);
	454	if (ret)
	455	goto err_bluetooth;
	456	}
	457
	458	if ((status & (1<<4\|1<<10)) == (1<<4\|1<<10)) {
ada3248a AJ	459	wwan_rfkill = rfkill_alloc("dell-wwan",
	460	&platform_device->dev,
	461	RFKILL_TYPE_WWAN,
19d337df JB	462	&dell_rfkill_ops, (void *) 3);
	463	if (!wwan_rfkill) {
	464	ret = -ENOMEM;
ad8f07cc	465	goto err_wwan;
19d337df	466	}
ad8f07cc MG	467	ret = rfkill_register(wwan_rfkill);
	468	if (ret)
	469	goto err_wwan;
	470	}
	471
	472	return 0;
	473	err_wwan:
19d337df JB	474	rfkill_destroy(wwan_rfkill);
19d337df JB	475	if (bluetooth_rfkill)
ad8f07cc	476	rfkill_unregister(bluetooth_rfkill);
ad8f07cc	477	err_bluetooth:
19d337df JB	478	rfkill_destroy(bluetooth_rfkill);
19d337df JB	479	if (wifi_rfkill)
ad8f07cc	480	rfkill_unregister(wifi_rfkill);
ad8f07cc	481	err_wifi:
19d337df	482	rfkill_destroy(wifi_rfkill);
ad8f07cc MG	483
	484	return ret;
	485	}
	486
4311bb23 AJ	487	static void dell_cleanup_rfkill(void)
	488	{
	489	if (wifi_rfkill) {
	490	rfkill_unregister(wifi_rfkill);
	491	rfkill_destroy(wifi_rfkill);
	492	}
	493	if (bluetooth_rfkill) {
	494	rfkill_unregister(bluetooth_rfkill);
	495	rfkill_destroy(bluetooth_rfkill);
	496	}
	497	if (wwan_rfkill) {
	498	rfkill_unregister(wwan_rfkill);
	499	rfkill_destroy(wwan_rfkill);
	500	}
	501	}
	502
ad8f07cc MG	503	static int dell_send_intensity(struct backlight_device *bd)
ad8f07cc MG	504	{
116ee77b	505	int ret = 0;
ad8f07cc	506
116ee77b SH	507	get_buffer();
	508	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	509	buffer->input[1] = bd->props.brightness;
ad8f07cc	510
116ee77b SH	511	if (buffer->input[0] == -1) {
	512	ret = -ENODEV;
	513	goto out;
	514	}
ad8f07cc MG	515
ad8f07cc MG	516	if (power_supply_is_system_supplied() > 0)
116ee77b	517	dell_send_request(buffer, 1, 2);
ad8f07cc	518	else
116ee77b	519	dell_send_request(buffer, 1, 1);
ad8f07cc	520
116ee77b SH	521	out:
116ee77b SH	522	release_buffer();
ad8f07cc MG	523	return 0;
	524	}
	525
	526	static int dell_get_intensity(struct backlight_device *bd)
	527	{
116ee77b	528	int ret = 0;
ad8f07cc	529
116ee77b SH	530	get_buffer();
116ee77b SH	531	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
ad8f07cc	532
116ee77b SH	533	if (buffer->input[0] == -1) {
	534	ret = -ENODEV;
	535	goto out;
	536	}
ad8f07cc MG	537
ad8f07cc MG	538	if (power_supply_is_system_supplied() > 0)
116ee77b	539	dell_send_request(buffer, 0, 2);
ad8f07cc	540	else
116ee77b	541	dell_send_request(buffer, 0, 1);
ad8f07cc	542
116ee77b SH	543	out:
	544	release_buffer();
	545	if (ret)
	546	return ret;
	547	return buffer->output[1];
ad8f07cc MG	548	}
ad8f07cc MG	549
acc2472e	550	static const struct backlight_ops dell_ops = {
ad8f07cc MG	551	.get_brightness = dell_get_intensity,
	552	.update_status = dell_send_intensity,
	553	};
	554
4519169b	555	static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
814cb8ad MG	556	struct serio *port)
	557	{
	558	static bool extended;
	559
	560	if (str & 0x20)
	561	return false;
	562
	563	if (unlikely(data == 0xe0)) {
	564	extended = true;
	565	return false;
	566	} else if (unlikely(extended)) {
	567	switch (data) {
	568	case 0x8:
	569	schedule_delayed_work(&dell_rfkill_work,
	570	round_jiffies_relative(HZ));
	571	break;
	572	}
	573	extended = false;
	574	}
	575
	576	return false;
	577	}
	578
ad8f07cc MG	579	static int __init dell_init(void)
ad8f07cc MG	580	{
ad8f07cc MG	581	int max_intensity = 0;
	582	int ret;
	583
	584	if (!dmi_check_system(dell_device_table))
	585	return -ENODEV;
	586
e7a19c56	587	dmi_walk(find_tokens, NULL);
ad8f07cc MG	588
ad8f07cc MG	589	if (!da_tokens) {
eb889524	590	pr_info("Unable to find dmi tokens\n");
ad8f07cc MG	591	return -ENODEV;
	592	}
	593
ada3248a AJ	594	ret = platform_driver_register(&platform_driver);
	595	if (ret)
	596	goto fail_platform_driver;
	597	platform_device = platform_device_alloc("dell-laptop", -1);
	598	if (!platform_device) {
	599	ret = -ENOMEM;
	600	goto fail_platform_device1;
	601	}
	602	ret = platform_device_add(platform_device);
	603	if (ret)
	604	goto fail_platform_device2;
	605
116ee77b SH	606	/*
	607	* Allocate buffer below 4GB for SMI data--only 32-bit physical addr
	608	* is passed to SMI handler.
	609	*/
	610	bufferpage = alloc_page(GFP_KERNEL \| GFP_DMA32);
	611
	612	if (!bufferpage)
	613	goto fail_buffer;
	614	buffer = page_address(bufferpage);
	615	mutex_init(&buffer_mutex);
	616
ad8f07cc MG	617	ret = dell_setup_rfkill();
	618
	619	if (ret) {
eb889524	620	pr_warn("Unable to setup rfkill\n");
71e9dc73	621	goto fail_rfkill;
ad8f07cc MG	622	}
ad8f07cc MG	623
814cb8ad MG	624	ret = i8042_install_filter(dell_laptop_i8042_filter);
814cb8ad MG	625	if (ret) {
eb889524	626	pr_warn("Unable to install key filter\n");
814cb8ad MG	627	goto fail_filter;
	628	}
	629
037accfa KYL	630	dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
	631	if (dell_laptop_dir != NULL)
	632	debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
	633	&dell_debugfs_fops);
	634
ad8f07cc MG	635	#ifdef CONFIG_ACPI
	636	/* In the event of an ACPI backlight being available, don't
	637	* register the platform controller.
	638	*/
	639	if (acpi_video_backlight_support())
	640	return 0;
	641	#endif
	642
116ee77b SH	643	get_buffer();
	644	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	645	if (buffer->input[0] != -1) {
	646	dell_send_request(buffer, 0, 2);
	647	max_intensity = buffer->output[3];
ad8f07cc	648	}
116ee77b	649	release_buffer();
ad8f07cc MG	650
ad8f07cc MG	651	if (max_intensity) {
a19a6ee6 MG	652	struct backlight_properties props;
a19a6ee6 MG	653	memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747	654	props.type = BACKLIGHT_PLATFORM;
a19a6ee6 MG	655	props.max_brightness = max_intensity;
	656	dell_backlight_device = backlight_device_register("dell_backlight",
	657	&platform_device->dev,
	658	NULL,
	659	&dell_ops,
	660	&props);
ad8f07cc MG	661
	662	if (IS_ERR(dell_backlight_device)) {
	663	ret = PTR_ERR(dell_backlight_device);
	664	dell_backlight_device = NULL;
71e9dc73	665	goto fail_backlight;
ad8f07cc MG	666	}
ad8f07cc MG	667
ad8f07cc MG	668	dell_backlight_device->props.brightness =
	669	dell_get_intensity(dell_backlight_device);
	670	backlight_update_status(dell_backlight_device);
	671	}
	672
	673	return 0;
71e9dc73 AJ	674
71e9dc73 AJ	675	fail_backlight:
814cb8ad	676	i8042_remove_filter(dell_laptop_i8042_filter);
92e00e47	677	cancel_delayed_work_sync(&dell_rfkill_work);
814cb8ad	678	fail_filter:
4311bb23	679	dell_cleanup_rfkill();
71e9dc73	680	fail_rfkill:
116ee77b SH	681	free_page((unsigned long)bufferpage);
116ee77b SH	682	fail_buffer:
ada3248a AJ	683	platform_device_del(platform_device);
	684	fail_platform_device2:
	685	platform_device_put(platform_device);
	686	fail_platform_device1:
	687	platform_driver_unregister(&platform_driver);
	688	fail_platform_driver:
ad8f07cc MG	689	kfree(da_tokens);
	690	return ret;
	691	}
	692
	693	static void __exit dell_exit(void)
	694	{
037accfa	695	debugfs_remove_recursive(dell_laptop_dir);
814cb8ad	696	i8042_remove_filter(dell_laptop_i8042_filter);
92e00e47	697	cancel_delayed_work_sync(&dell_rfkill_work);
ad8f07cc	698	backlight_device_unregister(dell_backlight_device);
4311bb23	699	dell_cleanup_rfkill();
facd61d7	700	if (platform_device) {
92e00e47	701	platform_device_unregister(platform_device);
facd61d7 MG	702	platform_driver_unregister(&platform_driver);
facd61d7 MG	703	}
e551260b	704	kfree(da_tokens);
116ee77b	705	free_page((unsigned long)buffer);
ad8f07cc MG	706	}
	707
	708	module_init(dell_init);
	709	module_exit(dell_exit);
	710
	711	MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
	712	MODULE_DESCRIPTION("Dell laptop driver");
	713	MODULE_LICENSE("GPL");
	714	MODULE_ALIAS("dmi:svnDellInc.::ct8:*");
410d44c7	715	MODULE_ALIAS("dmi:svnDellInc.::ct9:*");
cb6a7937	716	MODULE_ALIAS("dmi:svnDellComputerCorporation.::ct8:*");