[linux-2.6-block.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 <linux/slab.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"),
		},
	},
	{
		.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 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 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) {
		struct backlight_properties props;
		memset(&props, 0, sizeof(struct backlight_properties));
		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)
{
	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:*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
	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>
5a0e3ad6	27	#include <linux/slab.h>
cad73120	28	#include "../../firmware/dcdbas.h"
ad8f07cc MG	29
	30	#define BRIGHTNESS_TOKEN 0x7d
	31
	32	/* This structure will be modified by the firmware when we enter
	33	* system management mode, hence the volatiles */
	34
	35	struct calling_interface_buffer {
	36	u16 class;
	37	u16 select;
	38	volatile u32 input[4];
	39	volatile u32 output[4];
	40	} __packed;
	41
	42	struct calling_interface_token {
	43	u16 tokenID;
	44	u16 location;
	45	union {
	46	u16 value;
	47	u16 stringlength;
	48	};
	49	};
	50
	51	struct calling_interface_structure {
	52	struct dmi_header header;
	53	u16 cmdIOAddress;
	54	u8 cmdIOCode;
	55	u32 supportedCmds;
	56	struct calling_interface_token tokens[];
	57	} __packed;
	58
	59	static int da_command_address;
	60	static int da_command_code;
	61	static int da_num_tokens;
	62	static struct calling_interface_token *da_tokens;
	63
ada3248a AJ	64	static struct platform_driver platform_driver = {
	65	.driver = {
	66	.name = "dell-laptop",
	67	.owner = THIS_MODULE,
	68	}
	69	};
	70
	71	static struct platform_device *platform_device;
ad8f07cc MG	72	static struct backlight_device *dell_backlight_device;
	73	static struct rfkill *wifi_rfkill;
	74	static struct rfkill *bluetooth_rfkill;
	75	static struct rfkill *wwan_rfkill;
	76
	77	static const struct dmi_system_id __initdata dell_device_table[] = {
	78	{
	79	.ident = "Dell laptop",
	80	.matches = {
	81	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	82	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
	83	},
	84	},
cb6a7937 EA	85	{
	86	.ident = "Dell Computer Corporation",
	87	.matches = {
	88	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
	89	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
	90	},
	91	},
ad8f07cc MG	92	{ }
	93	};
	94
e5fefd0c ML	95	static struct dmi_system_id __devinitdata dell_blacklist[] = {
	96	/* Supported by compal-laptop */
	97	{
	98	.ident = "Dell Mini 9",
	99	.matches = {
	100	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	101	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
	102	},
	103	},
	104	{
	105	.ident = "Dell Mini 10",
	106	.matches = {
	107	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	108	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
	109	},
	110	},
	111	{
	112	.ident = "Dell Mini 10v",
	113	.matches = {
	114	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	115	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
	116	},
	117	},
	118	{
	119	.ident = "Dell Inspiron 11z",
	120	.matches = {
	121	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	122	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
	123	},
	124	},
	125	{
	126	.ident = "Dell Mini 12",
	127	.matches = {
	128	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	129	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
	130	},
	131	},
	132	{}
	133	};
	134
116ee77b	135	static struct calling_interface_buffer *buffer;
94d8f785 IM	136	static struct page *bufferpage;
94d8f785 IM	137	static DEFINE_MUTEX(buffer_mutex);
116ee77b	138
c6760ac4 MG	139	static int hwswitch_state;
c6760ac4 MG	140
116ee77b SH	141	static void get_buffer(void)
	142	{
	143	mutex_lock(&buffer_mutex);
	144	memset(buffer, 0, sizeof(struct calling_interface_buffer));
	145	}
	146
	147	static void release_buffer(void)
	148	{
	149	mutex_unlock(&buffer_mutex);
	150	}
	151
4788df4c	152	static void __init parse_da_table(const struct dmi_header *dm)
ad8f07cc MG	153	{
	154	/* Final token is a terminator, so we don't want to copy it */
	155	int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
	156	struct calling_interface_structure *table =
	157	container_of(dm, struct calling_interface_structure, header);
	158
	159	/* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
	160	6 bytes of entry */
	161
	162	if (dm->length < 17)
	163	return;
	164
	165	da_command_address = table->cmdIOAddress;
	166	da_command_code = table->cmdIOCode;
	167
	168	da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
	169	sizeof(struct calling_interface_token),
	170	GFP_KERNEL);
	171
	172	if (!da_tokens)
	173	return;
	174
	175	memcpy(da_tokens+da_num_tokens, table->tokens,
	176	sizeof(struct calling_interface_token) * tokens);
	177
	178	da_num_tokens += tokens;
	179	}
	180
4788df4c	181	static void __init find_tokens(const struct dmi_header dm, void dummy)
ad8f07cc MG	182	{
	183	switch (dm->type) {
	184	case 0xd4: /* Indexed IO */
	185	break;
	186	case 0xd5: /* Protected Area Type 1 */
	187	break;
	188	case 0xd6: /* Protected Area Type 2 */
	189	break;
	190	case 0xda: /* Calling interface */
	191	parse_da_table(dm);
	192	break;
	193	}
	194	}
	195
	196	static int find_token_location(int tokenid)
	197	{
	198	int i;
	199	for (i = 0; i < da_num_tokens; i++) {
	200	if (da_tokens[i].tokenID == tokenid)
	201	return da_tokens[i].location;
	202	}
	203
	204	return -1;
	205	}
	206
	207	static struct calling_interface_buffer *
	208	dell_send_request(struct calling_interface_buffer *buffer, int class,
	209	int select)
	210	{
	211	struct smi_cmd command;
	212
	213	command.magic = SMI_CMD_MAGIC;
	214	command.command_address = da_command_address;
	215	command.command_code = da_command_code;
	216	command.ebx = virt_to_phys(buffer);
	217	command.ecx = 0x42534931;
	218
	219	buffer->class = class;
	220	buffer->select = select;
	221
	222	dcdbas_smi_request(&command);
	223
	224	return buffer;
	225	}
	226
	227	/* Derived from information in DellWirelessCtl.cpp:
	228	Class 17, select 11 is radio control. It returns an array of 32-bit values.
	229
c6760ac4 MG	230	Input byte 0 = 0: Wireless information
c6760ac4 MG	231
ad8f07cc MG	232	result[0]: return code
	233	result[1]:
	234	Bit 0: Hardware switch supported
	235	Bit 1: Wifi locator supported
	236	Bit 2: Wifi is supported
	237	Bit 3: Bluetooth is supported
	238	Bit 4: WWAN is supported
	239	Bit 5: Wireless keyboard supported
	240	Bits 6-7: Reserved
	241	Bit 8: Wifi is installed
	242	Bit 9: Bluetooth is installed
	243	Bit 10: WWAN is installed
	244	Bits 11-15: Reserved
	245	Bit 16: Hardware switch is on
	246	Bit 17: Wifi is blocked
	247	Bit 18: Bluetooth is blocked
	248	Bit 19: WWAN is blocked
	249	Bits 20-31: Reserved
	250	result[2]: NVRAM size in bytes
	251	result[3]: NVRAM format version number
c6760ac4 MG	252
	253	Input byte 0 = 2: Wireless switch configuration
	254	result[0]: return code
	255	result[1]:
	256	Bit 0: Wifi controlled by switch
	257	Bit 1: Bluetooth controlled by switch
	258	Bit 2: WWAN controlled by switch
	259	Bits 3-6: Reserved
	260	Bit 7: Wireless switch config locked
	261	Bit 8: Wifi locator enabled
	262	Bits 9-14: Reserved
	263	Bit 15: Wifi locator setting locked
	264	Bits 16-31: Reserved
ad8f07cc MG	265	*/
ad8f07cc MG	266
19d337df	267	static int dell_rfkill_set(void *data, bool blocked)
ad8f07cc	268	{
624f0de4	269	int disable = blocked ? 1 : 0;
19d337df	270	unsigned long radio = (unsigned long)data;
c6760ac4	271	int hwswitch_bit = (unsigned long)data - 1;
116ee77b	272	int ret = 0;
ad8f07cc	273
116ee77b SH	274	get_buffer();
116ee77b SH	275	dell_send_request(buffer, 17, 11);
ec1722a2	276
c6760ac4 MG	277	/* If the hardware switch controls this radio, and the hardware
	278	switch is disabled, don't allow changing the software state */
	279	if ((hwswitch_state & BIT(hwswitch_bit)) &&
	280	!(buffer->output[1] & BIT(16))) {
116ee77b SH	281	ret = -EINVAL;
	282	goto out;
	283	}
ad8f07cc	284
116ee77b SH	285	buffer->input[0] = (1 \| (radio<<8) \| (disable << 16));
	286	dell_send_request(buffer, 17, 11);
	287
	288	out:
	289	release_buffer();
	290	return ret;
ad8f07cc MG	291	}
ad8f07cc MG	292
19d337df	293	static void dell_rfkill_query(struct rfkill rfkill, void data)
ad8f07cc	294	{
ad8f07cc	295	int status;
19d337df	296	int bit = (unsigned long)data + 16;
c6760ac4	297	int hwswitch_bit = (unsigned long)data - 1;
ad8f07cc	298
116ee77b SH	299	get_buffer();
	300	dell_send_request(buffer, 17, 11);
	301	status = buffer->output[1];
	302	release_buffer();
ad8f07cc	303
e1fbf346	304	rfkill_set_sw_state(rfkill, !!(status & BIT(bit)));
c6760ac4 MG	305
	306	if (hwswitch_state & (BIT(hwswitch_bit)))
	307	rfkill_set_hw_state(rfkill, !(status & BIT(16)));
ad8f07cc MG	308	}
ad8f07cc MG	309
19d337df JB	310	static const struct rfkill_ops dell_rfkill_ops = {
	311	.set_block = dell_rfkill_set,
	312	.query = dell_rfkill_query,
	313	};
ad8f07cc	314
814cb8ad MG	315	static void dell_update_rfkill(struct work_struct *ignored)
	316	{
	317	if (wifi_rfkill)
	318	dell_rfkill_query(wifi_rfkill, (void *)1);
	319	if (bluetooth_rfkill)
	320	dell_rfkill_query(bluetooth_rfkill, (void *)2);
	321	if (wwan_rfkill)
	322	dell_rfkill_query(wwan_rfkill, (void *)3);
	323	}
	324	static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
	325
	326
4788df4c	327	static int __init dell_setup_rfkill(void)
ad8f07cc	328	{
ad8f07cc MG	329	int status;
	330	int ret;
	331
e5fefd0c ML	332	if (dmi_check_system(dell_blacklist)) {
	333	printk(KERN_INFO "dell-laptop: Blacklisted hardware detected - "
	334	"not enabling rfkill\n");
	335	return 0;
	336	}
	337
116ee77b SH	338	get_buffer();
	339	dell_send_request(buffer, 17, 11);
	340	status = buffer->output[1];
c6760ac4 MG	341	buffer->input[0] = 0x2;
	342	dell_send_request(buffer, 17, 11);
	343	hwswitch_state = buffer->output[1];
116ee77b	344	release_buffer();
ad8f07cc MG	345
ad8f07cc MG	346	if ((status & (1<<2\|1<<8)) == (1<<2\|1<<8)) {
ada3248a AJ	347	wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
ada3248a AJ	348	RFKILL_TYPE_WLAN,
19d337df JB	349	&dell_rfkill_ops, (void *) 1);
	350	if (!wifi_rfkill) {
	351	ret = -ENOMEM;
ad8f07cc	352	goto err_wifi;
19d337df	353	}
ad8f07cc MG	354	ret = rfkill_register(wifi_rfkill);
	355	if (ret)
	356	goto err_wifi;
	357	}
	358
	359	if ((status & (1<<3\|1<<9)) == (1<<3\|1<<9)) {
ada3248a AJ	360	bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
ada3248a AJ	361	&platform_device->dev,
19d337df JB	362	RFKILL_TYPE_BLUETOOTH,
	363	&dell_rfkill_ops, (void *) 2);
	364	if (!bluetooth_rfkill) {
	365	ret = -ENOMEM;
ad8f07cc	366	goto err_bluetooth;
19d337df	367	}
ad8f07cc MG	368	ret = rfkill_register(bluetooth_rfkill);
	369	if (ret)
	370	goto err_bluetooth;
	371	}
	372
	373	if ((status & (1<<4\|1<<10)) == (1<<4\|1<<10)) {
ada3248a AJ	374	wwan_rfkill = rfkill_alloc("dell-wwan",
	375	&platform_device->dev,
	376	RFKILL_TYPE_WWAN,
19d337df JB	377	&dell_rfkill_ops, (void *) 3);
	378	if (!wwan_rfkill) {
	379	ret = -ENOMEM;
ad8f07cc	380	goto err_wwan;
19d337df	381	}
ad8f07cc MG	382	ret = rfkill_register(wwan_rfkill);
	383	if (ret)
	384	goto err_wwan;
	385	}
	386
	387	return 0;
	388	err_wwan:
19d337df JB	389	rfkill_destroy(wwan_rfkill);
19d337df JB	390	if (bluetooth_rfkill)
ad8f07cc	391	rfkill_unregister(bluetooth_rfkill);
ad8f07cc	392	err_bluetooth:
19d337df JB	393	rfkill_destroy(bluetooth_rfkill);
19d337df JB	394	if (wifi_rfkill)
ad8f07cc	395	rfkill_unregister(wifi_rfkill);
ad8f07cc	396	err_wifi:
19d337df	397	rfkill_destroy(wifi_rfkill);
ad8f07cc MG	398
	399	return ret;
	400	}
	401
4311bb23 AJ	402	static void dell_cleanup_rfkill(void)
	403	{
	404	if (wifi_rfkill) {
	405	rfkill_unregister(wifi_rfkill);
	406	rfkill_destroy(wifi_rfkill);
	407	}
	408	if (bluetooth_rfkill) {
	409	rfkill_unregister(bluetooth_rfkill);
	410	rfkill_destroy(bluetooth_rfkill);
	411	}
	412	if (wwan_rfkill) {
	413	rfkill_unregister(wwan_rfkill);
	414	rfkill_destroy(wwan_rfkill);
	415	}
	416	}
	417
ad8f07cc MG	418	static int dell_send_intensity(struct backlight_device *bd)
ad8f07cc MG	419	{
116ee77b	420	int ret = 0;
ad8f07cc	421
116ee77b SH	422	get_buffer();
	423	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	424	buffer->input[1] = bd->props.brightness;
ad8f07cc	425
116ee77b SH	426	if (buffer->input[0] == -1) {
	427	ret = -ENODEV;
	428	goto out;
	429	}
ad8f07cc MG	430
ad8f07cc MG	431	if (power_supply_is_system_supplied() > 0)
116ee77b	432	dell_send_request(buffer, 1, 2);
ad8f07cc	433	else
116ee77b	434	dell_send_request(buffer, 1, 1);
ad8f07cc	435
116ee77b SH	436	out:
116ee77b SH	437	release_buffer();
ad8f07cc MG	438	return 0;
	439	}
	440
	441	static int dell_get_intensity(struct backlight_device *bd)
	442	{
116ee77b	443	int ret = 0;
ad8f07cc	444
116ee77b SH	445	get_buffer();
116ee77b SH	446	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
ad8f07cc	447
116ee77b SH	448	if (buffer->input[0] == -1) {
	449	ret = -ENODEV;
	450	goto out;
	451	}
ad8f07cc MG	452
ad8f07cc MG	453	if (power_supply_is_system_supplied() > 0)
116ee77b	454	dell_send_request(buffer, 0, 2);
ad8f07cc	455	else
116ee77b	456	dell_send_request(buffer, 0, 1);
ad8f07cc	457
116ee77b SH	458	out:
	459	release_buffer();
	460	if (ret)
	461	return ret;
	462	return buffer->output[1];
ad8f07cc MG	463	}
	464
	465	static struct backlight_ops dell_ops = {
	466	.get_brightness = dell_get_intensity,
	467	.update_status = dell_send_intensity,
	468	};
	469
814cb8ad MG	470	bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
	471	struct serio *port)
	472	{
	473	static bool extended;
	474
	475	if (str & 0x20)
	476	return false;
	477
	478	if (unlikely(data == 0xe0)) {
	479	extended = true;
	480	return false;
	481	} else if (unlikely(extended)) {
	482	switch (data) {
	483	case 0x8:
	484	schedule_delayed_work(&dell_rfkill_work,
	485	round_jiffies_relative(HZ));
	486	break;
	487	}
	488	extended = false;
	489	}
	490
	491	return false;
	492	}
	493
ad8f07cc MG	494	static int __init dell_init(void)
ad8f07cc MG	495	{
ad8f07cc MG	496	int max_intensity = 0;
	497	int ret;
	498
	499	if (!dmi_check_system(dell_device_table))
	500	return -ENODEV;
	501
e7a19c56	502	dmi_walk(find_tokens, NULL);
ad8f07cc MG	503
	504	if (!da_tokens) {
	505	printk(KERN_INFO "dell-laptop: Unable to find dmi tokens\n");
	506	return -ENODEV;
	507	}
	508
ada3248a AJ	509	ret = platform_driver_register(&platform_driver);
	510	if (ret)
	511	goto fail_platform_driver;
	512	platform_device = platform_device_alloc("dell-laptop", -1);
	513	if (!platform_device) {
	514	ret = -ENOMEM;
	515	goto fail_platform_device1;
	516	}
	517	ret = platform_device_add(platform_device);
	518	if (ret)
	519	goto fail_platform_device2;
	520
116ee77b SH	521	/*
	522	* Allocate buffer below 4GB for SMI data--only 32-bit physical addr
	523	* is passed to SMI handler.
	524	*/
	525	bufferpage = alloc_page(GFP_KERNEL \| GFP_DMA32);
	526
	527	if (!bufferpage)
	528	goto fail_buffer;
	529	buffer = page_address(bufferpage);
	530	mutex_init(&buffer_mutex);
	531
ad8f07cc MG	532	ret = dell_setup_rfkill();
	533
	534	if (ret) {
	535	printk(KERN_WARNING "dell-laptop: Unable to setup rfkill\n");
71e9dc73	536	goto fail_rfkill;
ad8f07cc MG	537	}
ad8f07cc MG	538
814cb8ad MG	539	ret = i8042_install_filter(dell_laptop_i8042_filter);
	540	if (ret) {
	541	printk(KERN_WARNING
	542	"dell-laptop: Unable to install key filter\n");
	543	goto fail_filter;
	544	}
	545
ad8f07cc MG	546	#ifdef CONFIG_ACPI
	547	/* In the event of an ACPI backlight being available, don't
	548	* register the platform controller.
	549	*/
	550	if (acpi_video_backlight_support())
	551	return 0;
	552	#endif
	553
116ee77b SH	554	get_buffer();
	555	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	556	if (buffer->input[0] != -1) {
	557	dell_send_request(buffer, 0, 2);
	558	max_intensity = buffer->output[3];
ad8f07cc	559	}
116ee77b	560	release_buffer();
ad8f07cc MG	561
ad8f07cc MG	562	if (max_intensity) {
a19a6ee6 MG	563	struct backlight_properties props;
	564	memset(&props, 0, sizeof(struct backlight_properties));
	565	props.max_brightness = max_intensity;
	566	dell_backlight_device = backlight_device_register("dell_backlight",
	567	&platform_device->dev,
	568	NULL,
	569	&dell_ops,
	570	&props);
ad8f07cc MG	571
	572	if (IS_ERR(dell_backlight_device)) {
	573	ret = PTR_ERR(dell_backlight_device);
	574	dell_backlight_device = NULL;
71e9dc73	575	goto fail_backlight;
ad8f07cc MG	576	}
ad8f07cc MG	577
ad8f07cc MG	578	dell_backlight_device->props.brightness =
	579	dell_get_intensity(dell_backlight_device);
	580	backlight_update_status(dell_backlight_device);
	581	}
	582
	583	return 0;
71e9dc73 AJ	584
71e9dc73 AJ	585	fail_backlight:
814cb8ad	586	i8042_remove_filter(dell_laptop_i8042_filter);
92e00e47	587	cancel_delayed_work_sync(&dell_rfkill_work);
814cb8ad	588	fail_filter:
4311bb23	589	dell_cleanup_rfkill();
71e9dc73	590	fail_rfkill:
116ee77b SH	591	free_page((unsigned long)bufferpage);
116ee77b SH	592	fail_buffer:
ada3248a AJ	593	platform_device_del(platform_device);
	594	fail_platform_device2:
	595	platform_device_put(platform_device);
	596	fail_platform_device1:
	597	platform_driver_unregister(&platform_driver);
	598	fail_platform_driver:
ad8f07cc MG	599	kfree(da_tokens);
	600	return ret;
	601	}
	602
	603	static void __exit dell_exit(void)
	604	{
814cb8ad	605	i8042_remove_filter(dell_laptop_i8042_filter);
92e00e47	606	cancel_delayed_work_sync(&dell_rfkill_work);
ad8f07cc	607	backlight_device_unregister(dell_backlight_device);
4311bb23	608	dell_cleanup_rfkill();
facd61d7	609	if (platform_device) {
92e00e47	610	platform_device_unregister(platform_device);
facd61d7 MG	611	platform_driver_unregister(&platform_driver);
facd61d7 MG	612	}
e551260b	613	kfree(da_tokens);
116ee77b	614	free_page((unsigned long)buffer);
ad8f07cc MG	615	}
	616
	617	module_init(dell_init);
	618	module_exit(dell_exit);
	619
	620	MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
	621	MODULE_DESCRIPTION("Dell laptop driver");
	622	MODULE_LICENSE("GPL");
	623	MODULE_ALIAS("dmi:svnDellInc.::ct8:*");
cb6a7937	624	MODULE_ALIAS("dmi:svnDellComputerCorporation.::ct8:*");