[net-next-2.6.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.
 */

#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 "../../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"),
		},
	},
	{ }
};

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 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;
struct page *bufferpage;
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 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)) {
		printk(KERN_INFO "dell-laptop: 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 struct backlight_ops dell_ops = {
	.get_brightness = dell_get_intensity,
	.update_status  = dell_send_intensity,
};

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)  {
		printk(KERN_INFO "dell-laptop: 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) {
		printk(KERN_WARNING "dell-laptop: Unable to setup rfkill\n");
		goto fail_rfkill;
	}

	ret = i8042_install_filter(dell_laptop_i8042_filter);
	if (ret) {
		printk(KERN_WARNING
		       "dell-laptop: Unable to install key filter\n");
		goto fail_filter;
	}

#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) {
		dell_backlight_device = backlight_device_register(
			"dell_backlight",
			&platform_device->dev, NULL,
			&dell_ops);

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

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