[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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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

#define BRIGHTNESS_TOKEN 0x7d

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

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

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

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

struct quirk_entry {
	u8 touchpad_led;
};

static struct quirk_entry *quirks;

static struct quirk_entry quirk_dell_vostro_v130 = {
	.touchpad_led = 1,
};

static int dmi_matched(const struct dmi_system_id *dmi)
{
	quirks = dmi->driver_data;
	return 1;
}

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

static struct dmi_system_id dell_quirks[] = {
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro V130",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro V131",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro 3350",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro 3555",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron N311z",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron M5110",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro 3360",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro 3460",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro 3560",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Vostro 3450",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron 5420",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron 5520",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron 5720",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron 7420",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron 7520",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{
		.callback = dmi_matched,
		.ident = "Dell Inspiron 7720",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
		},
		.driver_data = &quirk_dell_vostro_v130,
	},
	{ }
};

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 */
	case 0xd5: /* Protected Area Type 1 */
	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;
}

static struct dentry *dell_laptop_dir;

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

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

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

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

	return 0;
}

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

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

static 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);

	ret = buffer->output[1];

out:
	release_buffer();
	return ret;
}

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

static void touchpad_led_on(void)
{
	int command = 0x97;
	char data = 1;
	i8042_command(&data, command | 1 << 12);
}

static void touchpad_led_off(void)
{
	int command = 0x97;
	char data = 2;
	i8042_command(&data, command | 1 << 12);
}

static void touchpad_led_set(struct led_classdev *led_cdev,
	enum led_brightness value)
{
	if (value > 0)
		touchpad_led_on();
	else
		touchpad_led_off();
}

static struct led_classdev touchpad_led = {
	.name = "dell-laptop::touchpad",
	.brightness_set = touchpad_led_set,
	.flags = LED_CORE_SUSPENDRESUME,
};

static int touchpad_led_init(struct device *dev)
{
	return led_classdev_register(dev, &touchpad_led);
}

static void touchpad_led_exit(void)
{
	led_classdev_unregister(&touchpad_led);
}

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

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

	quirks = NULL;
	/* find if this machine support other functions */
	dmi_check_system(dell_quirks);

	dmi_walk(find_tokens, NULL);

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

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

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

	if (!bufferpage)
		goto fail_buffer;
	buffer = page_address(bufferpage);

	if (quirks && quirks->touchpad_led)
		touchpad_led_init(&platform_device->dev);

	dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);

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

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

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

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

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

	return 0;

fail_backlight:
	free_page((unsigned long)bufferpage);
fail_buffer:
	platform_device_del(platform_device);
fail_platform_device2:
	platform_device_put(platform_device);
fail_platform_device1:
	platform_driver_unregister(&platform_driver);
fail_platform_driver:
	kfree(da_tokens);
	return ret;
}

static void __exit dell_exit(void)
{
	debugfs_remove_recursive(dell_laptop_dir);
	if (quirks && quirks->touchpad_led)
		touchpad_led_exit();
	backlight_device_unregister(dell_backlight_device);
	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 <[email protected]>");
MODULE_DESCRIPTION("Dell laptop driver");
MODULE_LICENSE("GPL");
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
eb889524 JP	14	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
eb889524 JP	15
ad8f07cc MG	16	#include <linux/module.h>
	17	#include <linux/kernel.h>
	18	#include <linux/init.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/backlight.h>
	21	#include <linux/err.h>
	22	#include <linux/dmi.h>
	23	#include <linux/io.h>
ad8f07cc MG	24	#include <linux/power_supply.h>
ad8f07cc MG	25	#include <linux/acpi.h>
116ee77b	26	#include <linux/mm.h>
814cb8ad	27	#include <linux/i8042.h>
5a0e3ad6	28	#include <linux/slab.h>
037accfa KYL	29	#include <linux/debugfs.h>
037accfa KYL	30	#include <linux/seq_file.h>
cad73120	31	#include "../../firmware/dcdbas.h"
ad8f07cc MG	32
	33	#define BRIGHTNESS_TOKEN 0x7d
	34
	35	/* This structure will be modified by the firmware when we enter
	36	* system management mode, hence the volatiles */
	37
	38	struct calling_interface_buffer {
	39	u16 class;
	40	u16 select;
	41	volatile u32 input[4];
	42	volatile u32 output[4];
	43	} __packed;
	44
	45	struct calling_interface_token {
	46	u16 tokenID;
	47	u16 location;
	48	union {
	49	u16 value;
	50	u16 stringlength;
	51	};
	52	};
	53
	54	struct calling_interface_structure {
	55	struct dmi_header header;
	56	u16 cmdIOAddress;
	57	u8 cmdIOCode;
	58	u32 supportedCmds;
	59	struct calling_interface_token tokens[];
	60	} __packed;
	61
2d8b90be AK	62	struct quirk_entry {
	63	u8 touchpad_led;
	64	};
	65
	66	static struct quirk_entry *quirks;
	67
	68	static struct quirk_entry quirk_dell_vostro_v130 = {
	69	.touchpad_led = 1,
	70	};
	71
	72	static int dmi_matched(const struct dmi_system_id *dmi)
	73	{
	74	quirks = dmi->driver_data;
	75	return 1;
	76	}
	77
ad8f07cc MG	78	static int da_command_address;
	79	static int da_command_code;
	80	static int da_num_tokens;
	81	static struct calling_interface_token *da_tokens;
	82
ada3248a AJ	83	static struct platform_driver platform_driver = {
	84	.driver = {
	85	.name = "dell-laptop",
	86	.owner = THIS_MODULE,
	87	}
	88	};
	89
	90	static struct platform_device *platform_device;
ad8f07cc	91	static struct backlight_device *dell_backlight_device;
ad8f07cc	92
145047de	93	static const struct dmi_system_id dell_device_table[] __initconst = {
ad8f07cc MG	94	{
	95	.ident = "Dell laptop",
	96	.matches = {
	97	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	98	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
	99	},
	100	},
410d44c7 RK	101	{
	102	.matches = {
	103	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	104	DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /Laptop/
	105	},
	106	},
cb6a7937 EA	107	{
	108	.ident = "Dell Computer Corporation",
	109	.matches = {
	110	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
	111	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
	112	},
	113	},
ad8f07cc MG	114	{ }
ad8f07cc MG	115	};
35ae64fe	116	MODULE_DEVICE_TABLE(dmi, dell_device_table);
ad8f07cc	117
b859f159	118	static struct dmi_system_id dell_quirks[] = {
2d8b90be AK	119	{
	120	.callback = dmi_matched,
	121	.ident = "Dell Vostro V130",
	122	.matches = {
	123	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	124	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
	125	},
	126	.driver_data = &quirk_dell_vostro_v130,
	127	},
	128	{
	129	.callback = dmi_matched,
	130	.ident = "Dell Vostro V131",
	131	.matches = {
	132	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	133	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
	134	},
	135	.driver_data = &quirk_dell_vostro_v130,
	136	},
57b31b2f AWC	137	{
	138	.callback = dmi_matched,
	139	.ident = "Dell Vostro 3350",
	140	.matches = {
	141	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	142	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
	143	},
	144	.driver_data = &quirk_dell_vostro_v130,
	145	},
2a748853 AK	146	{
	147	.callback = dmi_matched,
	148	.ident = "Dell Vostro 3555",
	149	.matches = {
	150	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	151	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
	152	},
	153	.driver_data = &quirk_dell_vostro_v130,
	154	},
	155	{
	156	.callback = dmi_matched,
	157	.ident = "Dell Inspiron N311z",
	158	.matches = {
	159	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	160	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
	161	},
	162	.driver_data = &quirk_dell_vostro_v130,
	163	},
	164	{
	165	.callback = dmi_matched,
	166	.ident = "Dell Inspiron M5110",
	167	.matches = {
	168	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	169	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
	170	},
	171	.driver_data = &quirk_dell_vostro_v130,
	172	},
7f839228 AK	173	{
	174	.callback = dmi_matched,
	175	.ident = "Dell Vostro 3360",
	176	.matches = {
	177	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	178	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
	179	},
	180	.driver_data = &quirk_dell_vostro_v130,
	181	},
	182	{
	183	.callback = dmi_matched,
	184	.ident = "Dell Vostro 3460",
	185	.matches = {
	186	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	187	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
	188	},
	189	.driver_data = &quirk_dell_vostro_v130,
	190	},
	191	{
	192	.callback = dmi_matched,
	193	.ident = "Dell Vostro 3560",
	194	.matches = {
	195	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	196	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
	197	},
	198	.driver_data = &quirk_dell_vostro_v130,
	199	},
d0e0a477 AK	200	{
	201	.callback = dmi_matched,
	202	.ident = "Dell Vostro 3450",
	203	.matches = {
	204	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	205	DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
	206	},
	207	.driver_data = &quirk_dell_vostro_v130,
	208	},
5f1e88f4 AK	209	{
	210	.callback = dmi_matched,
	211	.ident = "Dell Inspiron 5420",
	212	.matches = {
	213	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2	214	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
5f1e88f4 AK	215	},
	216	.driver_data = &quirk_dell_vostro_v130,
	217	},
	218	{
	219	.callback = dmi_matched,
	220	.ident = "Dell Inspiron 5520",
	221	.matches = {
	222	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2	223	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
5f1e88f4 AK	224	},
	225	.driver_data = &quirk_dell_vostro_v130,
	226	},
	227	{
	228	.callback = dmi_matched,
	229	.ident = "Dell Inspiron 5720",
	230	.matches = {
	231	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2	232	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
5f1e88f4 AK	233	},
	234	.driver_data = &quirk_dell_vostro_v130,
	235	},
	236	{
	237	.callback = dmi_matched,
	238	.ident = "Dell Inspiron 7420",
	239	.matches = {
	240	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2	241	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
5f1e88f4 AK	242	},
	243	.driver_data = &quirk_dell_vostro_v130,
	244	},
	245	{
	246	.callback = dmi_matched,
	247	.ident = "Dell Inspiron 7520",
	248	.matches = {
	249	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2	250	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
5f1e88f4 AK	251	},
	252	.driver_data = &quirk_dell_vostro_v130,
	253	},
	254	{
	255	.callback = dmi_matched,
	256	.ident = "Dell Inspiron 7720",
	257	.matches = {
	258	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
a2174ba2	259	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
5f1e88f4 AK	260	},
	261	.driver_data = &quirk_dell_vostro_v130,
	262	},
d62d421b	263	{ }
2d8b90be AK	264	};
2d8b90be AK	265
116ee77b	266	static struct calling_interface_buffer *buffer;
94d8f785 IM	267	static struct page *bufferpage;
94d8f785 IM	268	static DEFINE_MUTEX(buffer_mutex);
116ee77b	269
c6760ac4 MG	270	static int hwswitch_state;
c6760ac4 MG	271
116ee77b SH	272	static void get_buffer(void)
	273	{
	274	mutex_lock(&buffer_mutex);
	275	memset(buffer, 0, sizeof(struct calling_interface_buffer));
	276	}
	277
	278	static void release_buffer(void)
	279	{
	280	mutex_unlock(&buffer_mutex);
	281	}
	282
4788df4c	283	static void __init parse_da_table(const struct dmi_header *dm)
ad8f07cc MG	284	{
	285	/* Final token is a terminator, so we don't want to copy it */
	286	int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
	287	struct calling_interface_structure *table =
	288	container_of(dm, struct calling_interface_structure, header);
	289
	290	/* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
	291	6 bytes of entry */
	292
	293	if (dm->length < 17)
	294	return;
	295
	296	da_command_address = table->cmdIOAddress;
	297	da_command_code = table->cmdIOCode;
	298
	299	da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
	300	sizeof(struct calling_interface_token),
	301	GFP_KERNEL);
	302
	303	if (!da_tokens)
	304	return;
	305
	306	memcpy(da_tokens+da_num_tokens, table->tokens,
	307	sizeof(struct calling_interface_token) * tokens);
	308
	309	da_num_tokens += tokens;
	310	}
	311
4788df4c	312	static void __init find_tokens(const struct dmi_header dm, void dummy)
ad8f07cc MG	313	{
	314	switch (dm->type) {
	315	case 0xd4: /* Indexed IO */
ad8f07cc	316	case 0xd5: /* Protected Area Type 1 */
ad8f07cc MG	317	case 0xd6: /* Protected Area Type 2 */
	318	break;
	319	case 0xda: /* Calling interface */
	320	parse_da_table(dm);
	321	break;
	322	}
	323	}
	324
	325	static int find_token_location(int tokenid)
	326	{
	327	int i;
	328	for (i = 0; i < da_num_tokens; i++) {
	329	if (da_tokens[i].tokenID == tokenid)
	330	return da_tokens[i].location;
	331	}
	332
	333	return -1;
	334	}
	335
	336	static struct calling_interface_buffer *
	337	dell_send_request(struct calling_interface_buffer *buffer, int class,
	338	int select)
	339	{
	340	struct smi_cmd command;
	341
	342	command.magic = SMI_CMD_MAGIC;
	343	command.command_address = da_command_address;
	344	command.command_code = da_command_code;
	345	command.ebx = virt_to_phys(buffer);
	346	command.ecx = 0x42534931;
	347
	348	buffer->class = class;
	349	buffer->select = select;
	350
	351	dcdbas_smi_request(&command);
	352
	353	return buffer;
	354	}
	355
037accfa KYL	356	static struct dentry *dell_laptop_dir;
	357
	358	static int dell_debugfs_show(struct seq_file s, void data)
	359	{
	360	int status;
	361
	362	get_buffer();
	363	dell_send_request(buffer, 17, 11);
	364	status = buffer->output[1];
	365	release_buffer();
	366
	367	seq_printf(s, "status:\t0x%X\n", status);
	368	seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
	369	status & BIT(0));
	370	seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
	371	(status & BIT(1)) >> 1);
	372	seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
	373	(status & BIT(2)) >> 2);
	374	seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
	375	(status & BIT(3)) >> 3);
	376	seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
	377	(status & BIT(4)) >> 4);
	378	seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
	379	(status & BIT(5)) >> 5);
	380	seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
	381	(status & BIT(8)) >> 8);
	382	seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
	383	(status & BIT(9)) >> 9);
	384	seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
	385	(status & BIT(10)) >> 10);
	386	seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
	387	(status & BIT(16)) >> 16);
	388	seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
	389	(status & BIT(17)) >> 17);
	390	seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
	391	(status & BIT(18)) >> 18);
	392	seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
	393	(status & BIT(19)) >> 19);
	394
	395	seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
	396	seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
	397	hwswitch_state & BIT(0));
	398	seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
	399	(hwswitch_state & BIT(1)) >> 1);
	400	seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
	401	(hwswitch_state & BIT(2)) >> 2);
	402	seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
	403	(hwswitch_state & BIT(7)) >> 7);
	404	seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
	405	(hwswitch_state & BIT(8)) >> 8);
	406	seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
	407	(hwswitch_state & BIT(15)) >> 15);
	408
	409	return 0;
	410	}
	411
	412	static int dell_debugfs_open(struct inode inode, struct file file)
	413	{
	414	return single_open(file, dell_debugfs_show, inode->i_private);
	415	}
	416
	417	static const struct file_operations dell_debugfs_fops = {
	418	.owner = THIS_MODULE,
	419	.open = dell_debugfs_open,
420	.read = seq_read,
421	.llseek = seq_lseek,
422	.release = single_release,
423	};
424
ad8f07cc MG	425	static int dell_send_intensity(struct backlight_device *bd)
ad8f07cc MG	426	{
116ee77b	427	int ret = 0;
ad8f07cc	428
116ee77b SH	429	get_buffer();
	430	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	431	buffer->input[1] = bd->props.brightness;
ad8f07cc	432
116ee77b SH	433	if (buffer->input[0] == -1) {
	434	ret = -ENODEV;
	435	goto out;
	436	}
ad8f07cc MG	437
ad8f07cc MG	438	if (power_supply_is_system_supplied() > 0)
116ee77b	439	dell_send_request(buffer, 1, 2);
ad8f07cc	440	else
116ee77b	441	dell_send_request(buffer, 1, 1);
ad8f07cc	442
116ee77b SH	443	out:
116ee77b SH	444	release_buffer();
ad8f07cc MG	445	return 0;
	446	}
	447
	448	static int dell_get_intensity(struct backlight_device *bd)
	449	{
116ee77b	450	int ret = 0;
ad8f07cc	451
116ee77b SH	452	get_buffer();
116ee77b SH	453	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
ad8f07cc	454
116ee77b SH	455	if (buffer->input[0] == -1) {
	456	ret = -ENODEV;
	457	goto out;
	458	}
ad8f07cc MG	459
ad8f07cc MG	460	if (power_supply_is_system_supplied() > 0)
116ee77b	461	dell_send_request(buffer, 0, 2);
ad8f07cc	462	else
116ee77b	463	dell_send_request(buffer, 0, 1);
ad8f07cc	464
b486742a JA	465	ret = buffer->output[1];
b486742a JA	466
116ee77b SH	467	out:
116ee77b SH	468	release_buffer();
b486742a	469	return ret;
ad8f07cc MG	470	}
ad8f07cc MG	471
acc2472e	472	static const struct backlight_ops dell_ops = {
ad8f07cc MG	473	.get_brightness = dell_get_intensity,
	474	.update_status = dell_send_intensity,
	475	};
	476
869f8dfa	477	static void touchpad_led_on(void)
2d8b90be AK	478	{
	479	int command = 0x97;
	480	char data = 1;
	481	i8042_command(&data, command \| 1 << 12);
	482	}
	483
869f8dfa	484	static void touchpad_led_off(void)
2d8b90be AK	485	{
	486	int command = 0x97;
	487	char data = 2;
	488	i8042_command(&data, command \| 1 << 12);
	489	}
	490
	491	static void touchpad_led_set(struct led_classdev *led_cdev,
	492	enum led_brightness value)
	493	{
	494	if (value > 0)
	495	touchpad_led_on();
	496	else
	497	touchpad_led_off();
	498	}
	499
	500	static struct led_classdev touchpad_led = {
	501	.name = "dell-laptop::touchpad",
	502	.brightness_set = touchpad_led_set,
2d5de9e8	503	.flags = LED_CORE_SUSPENDRESUME,
2d8b90be AK	504	};
2d8b90be AK	505
b859f159	506	static int touchpad_led_init(struct device *dev)
2d8b90be AK	507	{
	508	return led_classdev_register(dev, &touchpad_led);
	509	}
	510
	511	static void touchpad_led_exit(void)
	512	{
	513	led_classdev_unregister(&touchpad_led);
	514	}
	515
ad8f07cc MG	516	static int __init dell_init(void)
ad8f07cc MG	517	{
ad8f07cc MG	518	int max_intensity = 0;
	519	int ret;
	520
	521	if (!dmi_check_system(dell_device_table))
	522	return -ENODEV;
	523
2d8b90be AK	524	quirks = NULL;
	525	/* find if this machine support other functions */
	526	dmi_check_system(dell_quirks);
	527
e7a19c56	528	dmi_walk(find_tokens, NULL);
ad8f07cc MG	529
ad8f07cc MG	530	if (!da_tokens) {
eb889524	531	pr_info("Unable to find dmi tokens\n");
ad8f07cc MG	532	return -ENODEV;
	533	}
	534
ada3248a AJ	535	ret = platform_driver_register(&platform_driver);
	536	if (ret)
	537	goto fail_platform_driver;
	538	platform_device = platform_device_alloc("dell-laptop", -1);
	539	if (!platform_device) {
	540	ret = -ENOMEM;
	541	goto fail_platform_device1;
	542	}
	543	ret = platform_device_add(platform_device);
	544	if (ret)
	545	goto fail_platform_device2;
	546
116ee77b SH	547	/*
	548	* Allocate buffer below 4GB for SMI data--only 32-bit physical addr
	549	* is passed to SMI handler.
	550	*/
	551	bufferpage = alloc_page(GFP_KERNEL \| GFP_DMA32);
	552
	553	if (!bufferpage)
	554	goto fail_buffer;
	555	buffer = page_address(bufferpage);
116ee77b	556
2d8b90be AK	557	if (quirks && quirks->touchpad_led)
	558	touchpad_led_init(&platform_device->dev);
	559
037accfa	560	dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
037accfa	561
ad8f07cc MG	562	#ifdef CONFIG_ACPI
	563	/* In the event of an ACPI backlight being available, don't
	564	* register the platform controller.
	565	*/
	566	if (acpi_video_backlight_support())
	567	return 0;
	568	#endif
	569
116ee77b SH	570	get_buffer();
	571	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
	572	if (buffer->input[0] != -1) {
	573	dell_send_request(buffer, 0, 2);
	574	max_intensity = buffer->output[3];
ad8f07cc	575	}
116ee77b	576	release_buffer();
ad8f07cc MG	577
ad8f07cc MG	578	if (max_intensity) {
a19a6ee6 MG	579	struct backlight_properties props;
a19a6ee6 MG	580	memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747	581	props.type = BACKLIGHT_PLATFORM;
a19a6ee6 MG	582	props.max_brightness = max_intensity;
	583	dell_backlight_device = backlight_device_register("dell_backlight",
	584	&platform_device->dev,
	585	NULL,
	586	&dell_ops,
	587	&props);
ad8f07cc MG	588
	589	if (IS_ERR(dell_backlight_device)) {
	590	ret = PTR_ERR(dell_backlight_device);
	591	dell_backlight_device = NULL;
71e9dc73	592	goto fail_backlight;
ad8f07cc MG	593	}
ad8f07cc MG	594
ad8f07cc MG	595	dell_backlight_device->props.brightness =
	596	dell_get_intensity(dell_backlight_device);
	597	backlight_update_status(dell_backlight_device);
	598	}
	599
	600	return 0;
71e9dc73 AJ	601
71e9dc73 AJ	602	fail_backlight:
116ee77b SH	603	free_page((unsigned long)bufferpage);
116ee77b SH	604	fail_buffer:
ada3248a AJ	605	platform_device_del(platform_device);
	606	fail_platform_device2:
	607	platform_device_put(platform_device);
	608	fail_platform_device1:
	609	platform_driver_unregister(&platform_driver);
	610	fail_platform_driver:
ad8f07cc MG	611	kfree(da_tokens);
	612	return ret;
	613	}
	614
	615	static void __exit dell_exit(void)
	616	{
037accfa	617	debugfs_remove_recursive(dell_laptop_dir);
2d8b90be AK	618	if (quirks && quirks->touchpad_led)
2d8b90be AK	619	touchpad_led_exit();
ad8f07cc	620	backlight_device_unregister(dell_backlight_device);
facd61d7	621	if (platform_device) {
92e00e47	622	platform_device_unregister(platform_device);
facd61d7 MG	623	platform_driver_unregister(&platform_driver);
facd61d7 MG	624	}
e551260b	625	kfree(da_tokens);
116ee77b	626	free_page((unsigned long)buffer);
ad8f07cc MG	627	}
	628
	629	module_init(dell_init);
	630	module_exit(dell_exit);
	631
	632	MODULE_AUTHOR("Matthew Garrett <[email protected]>");
	633	MODULE_DESCRIPTION("Dell laptop driver");
	634	MODULE_LICENSE("GPL");