[linux.git] / drivers / platform / x86 / dell-laptop.c

/*
 *  Driver for Dell laptop extras
 *
 *  Copyright (c) Red Hat <[email protected]>
 *
 *  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 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.

   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
*/

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

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

	if (!(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;

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

	rfkill_set_sw_state(rfkill, !!(status & BIT(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];
	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 <[email protected]>");
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 <[email protected]>
	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
	131	static void get_buffer(void)
	132	{
	133	mutex_lock(&buffer_mutex);
	134	memset(buffer, 0, sizeof(struct calling_interface_buffer));
	135	}
	136
	137	static void release_buffer(void)
	138	{
	139	mutex_unlock(&buffer_mutex);
	140	}
	141
4788df4c	142	static void __init parse_da_table(const struct dmi_header *dm)
ad8f07cc MG	143	{
	144	/* Final token is a terminator, so we don't want to copy it */
	145	int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
	146	struct calling_interface_structure *table =
	147	container_of(dm, struct calling_interface_structure, header);
	148
	149	/* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
	150	6 bytes of entry */
	151
	152	if (dm->length < 17)
	153	return;
	154
	155	da_command_address = table->cmdIOAddress;
	156	da_command_code = table->cmdIOCode;
	157
	158	da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
	159	sizeof(struct calling_interface_token),
	160	GFP_KERNEL);
	161
	162	if (!da_tokens)
	163	return;
	164
	165	memcpy(da_tokens+da_num_tokens, table->tokens,
	166	sizeof(struct calling_interface_token) * tokens);
	167
	168	da_num_tokens += tokens;
	169	}
	170
4788df4c	171	static void __init find_tokens(const struct dmi_header dm, void dummy)
ad8f07cc MG	172	{
	173	switch (dm->type) {
	174	case 0xd4: /* Indexed IO */
	175	break;
	176	case 0xd5: /* Protected Area Type 1 */
	177	break;
	178	case 0xd6: /* Protected Area Type 2 */
	179	break;
	180	case 0xda: /* Calling interface */
	181	parse_da_table(dm);
	182	break;
	183	}
	184	}
	185
	186	static int find_token_location(int tokenid)
	187	{
	188	int i;
	189	for (i = 0; i < da_num_tokens; i++) {
	190	if (da_tokens[i].tokenID == tokenid)
	191	return da_tokens[i].location;
	192	}
	193
	194	return -1;
	195	}
	196
	197	static struct calling_interface_buffer *
	198	dell_send_request(struct calling_interface_buffer *buffer, int class,
	199	int select)
	200	{
	201	struct smi_cmd command;
	202
	203	command.magic = SMI_CMD_MAGIC;
	204	command.command_address = da_command_address;
	205	command.command_code = da_command_code;
	206	command.ebx = virt_to_phys(buffer);
	207	command.ecx = 0x42534931;
	208
	209	buffer->class = class;
	210	buffer->select = select;
	211
	212	dcdbas_smi_request(&command);
	213
	214	return buffer;
	215	}
	216
	217	/* Derived from information in DellWirelessCtl.cpp:
	218	Class 17, select 11 is radio control. It returns an array of 32-bit values.
	219
	220	result[0]: return code
	221	result[1]:
	222	Bit 0: Hardware switch supported
	223	Bit 1: Wifi locator supported
	224	Bit 2: Wifi is supported
	225	Bit 3: Bluetooth is supported
	226	Bit 4: WWAN is supported
	227	Bit 5: Wireless keyboard supported
	228	Bits 6-7: Reserved
	229	Bit 8: Wifi is installed
	230	Bit 9: Bluetooth is installed
	231	Bit 10: WWAN is installed
	232	Bits 11-15: Reserved
	233	Bit 16: Hardware switch is on
	234	Bit 17: Wifi is blocked
	235	Bit 18: Bluetooth is blocked
236	Bit 19: WWAN is blocked
237	Bits 20-31: Reserved
238	result[2]: NVRAM size in bytes
239	result[3]: NVRAM format version number
240	*/
241
19d337df	242	static int dell_rfkill_set(void *data, bool blocked)
ad8f07cc	243	{
624f0de4	244	int disable = blocked ? 1 : 0;
19d337df	245	unsigned long radio = (unsigned long)data;
116ee77b	246	int ret = 0;
ad8f07cc	247
116ee77b SH	248	get_buffer();
116ee77b SH	249	dell_send_request(buffer, 17, 11);
ec1722a2	250
116ee77b SH	251	if (!(buffer->output[1] & BIT(16))) {
	252	ret = -EINVAL;
	253	goto out;
	254	}
ad8f07cc	255
116ee77b SH	256	buffer->input[0] = (1 \| (radio<<8) \| (disable << 16));
	257	dell_send_request(buffer, 17, 11);
	258
	259	out:
	260	release_buffer();
	261	return ret;
ad8f07cc MG	262	}
ad8f07cc MG	263
19d337df	264	static void dell_rfkill_query(struct rfkill rfkill, void data)
ad8f07cc	265	{
ad8f07cc	266	int status;
19d337df	267	int bit = (unsigned long)data + 16;
ad8f07cc	268
116ee77b SH	269	get_buffer();
	270	dell_send_request(buffer, 17, 11);
	271	status = buffer->output[1];
	272	release_buffer();
ad8f07cc	273
e1fbf346 MG	274	rfkill_set_sw_state(rfkill, !!(status & BIT(bit)));
e1fbf346 MG	275	rfkill_set_hw_state(rfkill, !(status & BIT(16)));
ad8f07cc MG	276	}
ad8f07cc MG	277
19d337df JB	278	static const struct rfkill_ops dell_rfkill_ops = {
	279	.set_block = dell_rfkill_set,
	280	.query = dell_rfkill_query,
	281	};
ad8f07cc	282
814cb8ad MG	283	static void dell_update_rfkill(struct work_struct *ignored)
	284	{
	285	if (wifi_rfkill)
	286	dell_rfkill_query(wifi_rfkill, (void *)1);
	287	if (bluetooth_rfkill)
	288	dell_rfkill_query(bluetooth_rfkill, (void *)2);
	289	if (wwan_rfkill)
	290	dell_rfkill_query(wwan_rfkill, (void *)3);
	291	}
	292	static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
	293
	294
4788df4c	295	static int __init dell_setup_rfkill(void)
ad8f07cc	296	{
ad8f07cc MG	297	int status;
	298	int ret;
	299
e5fefd0c ML	300	if (dmi_check_system(dell_blacklist)) {
	301	printk(KERN_INFO "dell-laptop: Blacklisted hardware detected - "
	302	"not enabling rfkill\n");
	303	return 0;
	304	}
	305
116ee77b SH	306	get_buffer();
	307	dell_send_request(buffer, 17, 11);
	308	status = buffer->output[1];
	309	release_buffer();
ad8f07cc MG	310
ad8f07cc MG	311	if ((status & (1<<2\|1<<8)) == (1<<2\|1<<8)) {
ada3248a AJ	312	wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
ada3248a AJ	313	RFKILL_TYPE_WLAN,
19d337df JB	314	&dell_rfkill_ops, (void *) 1);
	315	if (!wifi_rfkill) {
	316	ret = -ENOMEM;
ad8f07cc	317	goto err_wifi;
19d337df	318	}
ad8f07cc MG	319	ret = rfkill_register(wifi_rfkill);
	320	if (ret)
	321	goto err_wifi;
	322	}
	323
	324	if ((status & (1<<3\|1<<9)) == (1<<3\|1<<9)) {
ada3248a AJ	325	bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
ada3248a AJ	326	&platform_device->dev,
19d337df JB	327	RFKILL_TYPE_BLUETOOTH,
	328	&dell_rfkill_ops, (void *) 2);
	329	if (!bluetooth_rfkill) {
	330	ret = -ENOMEM;
ad8f07cc	331	goto err_bluetooth;
19d337df	332	}
ad8f07cc MG	333	ret = rfkill_register(bluetooth_rfkill);
	334	if (ret)
	335	goto err_bluetooth;
	336	}
	337
	338	if ((status & (1<<4\|1<<10)) == (1<<4\|1<<10)) {
ada3248a AJ	339	wwan_rfkill = rfkill_alloc("dell-wwan",
	340	&platform_device->dev,
	341	RFKILL_TYPE_WWAN,
19d337df JB	342	&dell_rfkill_ops, (void *) 3);
	343	if (!wwan_rfkill) {
	344	ret = -ENOMEM;
ad8f07cc	345	goto err_wwan;
19d337df	346	}
ad8f07cc MG	347	ret = rfkill_register(wwan_rfkill);
	348	if (ret)
	349	goto err_wwan;
	350	}
	351
	352	return 0;
	353	err_wwan:
19d337df JB	354	rfkill_destroy(wwan_rfkill);
19d337df JB	355	if (bluetooth_rfkill)
ad8f07cc	356	rfkill_unregister(bluetooth_rfkill);
ad8f07cc	357	err_bluetooth:
19d337df JB	358	rfkill_destroy(bluetooth_rfkill);
19d337df JB	359	if (wifi_rfkill)
ad8f07cc	360	rfkill_unregister(wifi_rfkill);
ad8f07cc	361	err_wifi:
19d337df	362	rfkill_destroy(wifi_rfkill);
ad8f07cc MG	363
	364	return ret;
	365	}
	366
4311bb23 AJ	367	static void dell_cleanup_rfkill(void)
	368	{
	369	if (wifi_rfkill) {
	370	rfkill_unregister(wifi_rfkill);
	371	rfkill_destroy(wifi_rfkill);
	372	}
	373	if (bluetooth_rfkill) {
	374	rfkill_unregister(bluetooth_rfkill);
	375	rfkill_destroy(bluetooth_rfkill);
	376	}
	377	if (wwan_rfkill) {
	378	rfkill_unregister(wwan_rfkill);
	379	rfkill_destroy(wwan_rfkill);
	380	}
	381	}
	382
ad8f07cc MG	383	static int dell_send_intensity(struct backlight_device *bd)
ad8f07cc MG	384	{
116ee77b	385	int ret = 0;
ad8f07cc	386
116ee77b SH	387	get_buffer();
	388	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	389	buffer->input[1] = bd->props.brightness;
ad8f07cc	390
116ee77b SH	391	if (buffer->input[0] == -1) {
	392	ret = -ENODEV;
	393	goto out;
	394	}
ad8f07cc MG	395
ad8f07cc MG	396	if (power_supply_is_system_supplied() > 0)
116ee77b	397	dell_send_request(buffer, 1, 2);
ad8f07cc	398	else
116ee77b	399	dell_send_request(buffer, 1, 1);
ad8f07cc	400
116ee77b SH	401	out:
116ee77b SH	402	release_buffer();
ad8f07cc MG	403	return 0;
	404	}
	405
	406	static int dell_get_intensity(struct backlight_device *bd)
	407	{
116ee77b	408	int ret = 0;
ad8f07cc	409
116ee77b SH	410	get_buffer();
116ee77b SH	411	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
ad8f07cc	412
116ee77b SH	413	if (buffer->input[0] == -1) {
	414	ret = -ENODEV;
	415	goto out;
	416	}
ad8f07cc MG	417
ad8f07cc MG	418	if (power_supply_is_system_supplied() > 0)
116ee77b	419	dell_send_request(buffer, 0, 2);
ad8f07cc	420	else
116ee77b	421	dell_send_request(buffer, 0, 1);
ad8f07cc	422
116ee77b SH	423	out:
	424	release_buffer();
	425	if (ret)
	426	return ret;
	427	return buffer->output[1];
ad8f07cc MG	428	}
	429
	430	static struct backlight_ops dell_ops = {
	431	.get_brightness = dell_get_intensity,
	432	.update_status = dell_send_intensity,
	433	};
	434
814cb8ad MG	435	bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
	436	struct serio *port)
	437	{
	438	static bool extended;
	439
	440	if (str & 0x20)
	441	return false;
	442
	443	if (unlikely(data == 0xe0)) {
	444	extended = true;
	445	return false;
	446	} else if (unlikely(extended)) {
	447	switch (data) {
	448	case 0x8:
	449	schedule_delayed_work(&dell_rfkill_work,
	450	round_jiffies_relative(HZ));
	451	break;
	452	}
	453	extended = false;
	454	}
	455
	456	return false;
	457	}
	458
ad8f07cc MG	459	static int __init dell_init(void)
ad8f07cc MG	460	{
ad8f07cc MG	461	int max_intensity = 0;
	462	int ret;
	463
	464	if (!dmi_check_system(dell_device_table))
	465	return -ENODEV;
	466
e7a19c56	467	dmi_walk(find_tokens, NULL);
ad8f07cc MG	468
	469	if (!da_tokens) {
	470	printk(KERN_INFO "dell-laptop: Unable to find dmi tokens\n");
	471	return -ENODEV;
	472	}
	473
ada3248a AJ	474	ret = platform_driver_register(&platform_driver);
	475	if (ret)
	476	goto fail_platform_driver;
	477	platform_device = platform_device_alloc("dell-laptop", -1);
	478	if (!platform_device) {
	479	ret = -ENOMEM;
	480	goto fail_platform_device1;
	481	}
	482	ret = platform_device_add(platform_device);
	483	if (ret)
	484	goto fail_platform_device2;
	485
116ee77b SH	486	/*
	487	* Allocate buffer below 4GB for SMI data--only 32-bit physical addr
	488	* is passed to SMI handler.
	489	*/
	490	bufferpage = alloc_page(GFP_KERNEL \| GFP_DMA32);
	491
	492	if (!bufferpage)
	493	goto fail_buffer;
	494	buffer = page_address(bufferpage);
	495	mutex_init(&buffer_mutex);
	496
ad8f07cc MG	497	ret = dell_setup_rfkill();
	498
	499	if (ret) {
	500	printk(KERN_WARNING "dell-laptop: Unable to setup rfkill\n");
71e9dc73	501	goto fail_rfkill;
ad8f07cc MG	502	}
ad8f07cc MG	503
814cb8ad MG	504	ret = i8042_install_filter(dell_laptop_i8042_filter);
	505	if (ret) {
	506	printk(KERN_WARNING
	507	"dell-laptop: Unable to install key filter\n");
	508	goto fail_filter;
	509	}
	510
ad8f07cc MG	511	#ifdef CONFIG_ACPI
	512	/* In the event of an ACPI backlight being available, don't
	513	* register the platform controller.
	514	*/
	515	if (acpi_video_backlight_support())
	516	return 0;
	517	#endif
	518
116ee77b SH	519	get_buffer();
	520	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	521	if (buffer->input[0] != -1) {
	522	dell_send_request(buffer, 0, 2);
	523	max_intensity = buffer->output[3];
ad8f07cc	524	}
116ee77b	525	release_buffer();
ad8f07cc MG	526
	527	if (max_intensity) {
	528	dell_backlight_device = backlight_device_register(
	529	"dell_backlight",
ada3248a	530	&platform_device->dev, NULL,
ad8f07cc MG	531	&dell_ops);
	532
	533	if (IS_ERR(dell_backlight_device)) {
	534	ret = PTR_ERR(dell_backlight_device);
	535	dell_backlight_device = NULL;
71e9dc73	536	goto fail_backlight;
ad8f07cc MG	537	}
	538
	539	dell_backlight_device->props.max_brightness = max_intensity;
	540	dell_backlight_device->props.brightness =
	541	dell_get_intensity(dell_backlight_device);
	542	backlight_update_status(dell_backlight_device);
	543	}
	544
	545	return 0;
71e9dc73 AJ	546
71e9dc73 AJ	547	fail_backlight:
814cb8ad MG	548	i8042_remove_filter(dell_laptop_i8042_filter);
814cb8ad MG	549	fail_filter:
4311bb23	550	dell_cleanup_rfkill();
71e9dc73	551	fail_rfkill:
116ee77b SH	552	free_page((unsigned long)bufferpage);
116ee77b SH	553	fail_buffer:
ada3248a AJ	554	platform_device_del(platform_device);
	555	fail_platform_device2:
	556	platform_device_put(platform_device);
	557	fail_platform_device1:
	558	platform_driver_unregister(&platform_driver);
	559	fail_platform_driver:
ad8f07cc MG	560	kfree(da_tokens);
	561	return ret;
	562	}
	563
	564	static void __exit dell_exit(void)
	565	{
814cb8ad MG	566	cancel_delayed_work_sync(&dell_rfkill_work);
814cb8ad MG	567	i8042_remove_filter(dell_laptop_i8042_filter);
ad8f07cc	568	backlight_device_unregister(dell_backlight_device);
4311bb23	569	dell_cleanup_rfkill();
facd61d7 MG	570	if (platform_device) {
	571	platform_device_del(platform_device);
	572	platform_driver_unregister(&platform_driver);
	573	}
e551260b	574	kfree(da_tokens);
116ee77b	575	free_page((unsigned long)buffer);
ad8f07cc MG	576	}
	577
	578	module_init(dell_init);
	579	module_exit(dell_exit);
	580
	581	MODULE_AUTHOR("Matthew Garrett <[email protected]>");
	582	MODULE_DESCRIPTION("Dell laptop driver");
	583	MODULE_LICENSE("GPL");
	584	MODULE_ALIAS("dmi:svnDellInc.::ct8:*");