[mirror_ubuntu-bionic-kernel.git] / drivers / input / misc / wistron_btns.c

/*
 * Wistron laptop button driver
 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
 *
 * You can redistribute and/or modify this program under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place Suite 330, Boston, MA 02111-1307, USA.
 */
#include <asm/io.h>
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mc146818rtc.h>
#include <linux/module.h>
#include <linux/preempt.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/platform_device.h>

/*
 * Number of attempts to read data from queue per poll;
 * the queue can hold up to 31 entries
 */
#define MAX_POLL_ITERATIONS 64

#define POLL_FREQUENCY 10 /* Number of polls per second */

#if POLL_FREQUENCY > HZ
#error "POLL_FREQUENCY too high"
#endif

/* BIOS subsystem IDs */
#define WIFI		0x35
#define BLUETOOTH	0x34

MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
MODULE_DESCRIPTION("Wistron laptop button driver");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.1");

static int force; /* = 0; */
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Load even if computer is not in database");

static char *keymap_name; /* = NULL; */
module_param_named(keymap, keymap_name, charp, 0);
MODULE_PARM_DESC(keymap, "Keymap name, if it can't be autodetected");

static struct platform_device *wistron_device;

 /* BIOS interface implementation */

static void __iomem *bios_entry_point; /* BIOS routine entry point */
static void __iomem *bios_code_map_base;
static void __iomem *bios_data_map_base;

static u8 cmos_address;

struct regs {
	u32 eax, ebx, ecx;
};

static void call_bios(struct regs *regs)
{
	unsigned long flags;

	preempt_disable();
	local_irq_save(flags);
	asm volatile ("pushl %%ebp;"
		      "movl %7, %%ebp;"
		      "call *%6;"
		      "popl %%ebp"
		      : "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx)
		      : "0" (regs->eax), "1" (regs->ebx), "2" (regs->ecx),
			"m" (bios_entry_point), "m" (bios_data_map_base)
		      : "edx", "edi", "esi", "memory");
	local_irq_restore(flags);
	preempt_enable();
}

static ssize_t __init locate_wistron_bios(void __iomem *base)
{
	static const unsigned char __initdata signature[] =
		{ 0x42, 0x21, 0x55, 0x30 };
	ssize_t offset;

	for (offset = 0; offset < 0x10000; offset += 0x10) {
		if (check_signature(base + offset, signature,
				    sizeof(signature)) != 0)
			return offset;
	}
	return -1;
}

static int __init map_bios(void)
{
	void __iomem *base;
	ssize_t offset;
	u32 entry_point;

	base = ioremap(0xF0000, 0x10000); /* Can't fail */
	offset = locate_wistron_bios(base);
	if (offset < 0) {
		printk(KERN_ERR "wistron_btns: BIOS entry point not found\n");
		iounmap(base);
		return -ENODEV;
	}

	entry_point = readl(base + offset + 5);
	printk(KERN_DEBUG
		"wistron_btns: BIOS signature found at %p, entry point %08X\n",
		base + offset, entry_point);

	if (entry_point >= 0xF0000) {
		bios_code_map_base = base;
		bios_entry_point = bios_code_map_base + (entry_point & 0xFFFF);
	} else {
		iounmap(base);
		bios_code_map_base = ioremap(entry_point & ~0x3FFF, 0x4000);
		if (bios_code_map_base == NULL) {
			printk(KERN_ERR
				"wistron_btns: Can't map BIOS code at %08X\n",
				entry_point & ~0x3FFF);
			goto err;
		}
		bios_entry_point = bios_code_map_base + (entry_point & 0x3FFF);
	}
	/* The Windows driver maps 0x10000 bytes, we keep only one page... */
	bios_data_map_base = ioremap(0x400, 0xc00);
	if (bios_data_map_base == NULL) {
		printk(KERN_ERR "wistron_btns: Can't map BIOS data\n");
		goto err_code;
	}
	return 0;

err_code:
	iounmap(bios_code_map_base);
err:
	return -ENOMEM;
}

static inline void unmap_bios(void)
{
	iounmap(bios_code_map_base);
	iounmap(bios_data_map_base);
}

 /* BIOS calls */

static u16 bios_pop_queue(void)
{
	struct regs regs;

	memset(&regs, 0, sizeof (regs));
	regs.eax = 0x9610;
	regs.ebx = 0x061C;
	regs.ecx = 0x0000;
	call_bios(&regs);

	return regs.eax;
}

static void __devinit bios_attach(void)
{
	struct regs regs;

	memset(&regs, 0, sizeof (regs));
	regs.eax = 0x9610;
	regs.ebx = 0x012E;
	call_bios(&regs);
}

static void bios_detach(void)
{
	struct regs regs;

	memset(&regs, 0, sizeof (regs));
	regs.eax = 0x9610;
	regs.ebx = 0x002E;
	call_bios(&regs);
}

static u8 __devinit bios_get_cmos_address(void)
{
	struct regs regs;

	memset(&regs, 0, sizeof (regs));
	regs.eax = 0x9610;
	regs.ebx = 0x051C;
	call_bios(&regs);

	return regs.ecx;
}

static u16 __devinit bios_get_default_setting(u8 subsys)
{
	struct regs regs;

	memset(&regs, 0, sizeof (regs));
	regs.eax = 0x9610;
	regs.ebx = 0x0200 | subsys;
	call_bios(&regs);

	return regs.eax;
}

static void bios_set_state(u8 subsys, int enable)
{
	struct regs regs;

	memset(&regs, 0, sizeof (regs));
	regs.eax = 0x9610;
	regs.ebx = (enable ? 0x0100 : 0x0000) | subsys;
	call_bios(&regs);
}

/* Hardware database */

struct key_entry {
	char type;		/* See KE_* below */
	u8 code;
	unsigned keycode;	/* For KE_KEY */
};

enum { KE_END, KE_KEY, KE_WIFI, KE_BLUETOOTH };

static const struct key_entry *keymap; /* = NULL; Current key map */
static int have_wifi;
static int have_bluetooth;

static int __init dmi_matched(struct dmi_system_id *dmi)
{
	const struct key_entry *key;

	keymap = dmi->driver_data;
	for (key = keymap; key->type != KE_END; key++) {
		if (key->type == KE_WIFI) {
			have_wifi = 1;
			break;
		} else if (key->type == KE_BLUETOOTH) {
			have_bluetooth = 1;
			break;
		}
	}
	return 1;
}

static struct key_entry keymap_empty[] = {
	{ KE_END, 0 }
};

static struct key_entry keymap_fs_amilo_pro_v2000[] = {
	{ KE_KEY,  0x01, KEY_HELP },
	{ KE_KEY,  0x11, KEY_PROG1 },
	{ KE_KEY,  0x12, KEY_PROG2 },
	{ KE_WIFI, 0x30, 0 },
	{ KE_KEY,  0x31, KEY_MAIL },
	{ KE_KEY,  0x36, KEY_WWW },
	{ KE_END,  0 }
};

static struct key_entry keymap_fujitsu_n3510[] = {
	{ KE_KEY, 0x11, KEY_PROG1 },
	{ KE_KEY, 0x12, KEY_PROG2 },
	{ KE_KEY, 0x36, KEY_WWW },
	{ KE_KEY, 0x31, KEY_MAIL },
	{ KE_KEY, 0x71, KEY_STOPCD },
	{ KE_KEY, 0x72, KEY_PLAYPAUSE },
	{ KE_KEY, 0x74, KEY_REWIND },
	{ KE_KEY, 0x78, KEY_FORWARD },
	{ KE_END, 0 }
};

static struct key_entry keymap_wistron_ms2141[] = {
	{ KE_KEY,  0x11, KEY_PROG1 },
	{ KE_KEY,  0x12, KEY_PROG2 },
	{ KE_WIFI, 0x30, 0 },
	{ KE_KEY,  0x22, KEY_REWIND },
	{ KE_KEY,  0x23, KEY_FORWARD },
	{ KE_KEY,  0x24, KEY_PLAYPAUSE },
	{ KE_KEY,  0x25, KEY_STOPCD },
	{ KE_KEY,  0x31, KEY_MAIL },
	{ KE_KEY,  0x36, KEY_WWW },
	{ KE_END,  0 }
};

static struct key_entry keymap_acer_aspire_1500[] = {
	{ KE_KEY, 0x11, KEY_PROG1 },
	{ KE_KEY, 0x12, KEY_PROG2 },
	{ KE_WIFI, 0x30, 0 },
	{ KE_KEY, 0x31, KEY_MAIL },
	{ KE_KEY, 0x36, KEY_WWW },
	{ KE_BLUETOOTH, 0x44, 0 },
	{ KE_END, 0 }
};

static struct key_entry keymap_acer_travelmate_240[] = {
	{ KE_KEY, 0x31, KEY_MAIL },
	{ KE_KEY, 0x36, KEY_WWW },
	{ KE_KEY, 0x11, KEY_PROG1 },
	{ KE_KEY, 0x12, KEY_PROG2 },
	{ KE_BLUETOOTH, 0x44, 0 },
	{ KE_WIFI, 0x30, 0 },
	{ KE_END, 0 }
};

static struct key_entry keymap_aopen_1559as[] = {
	{ KE_KEY,  0x01, KEY_HELP },
	{ KE_KEY,  0x06, KEY_PROG3 },
	{ KE_KEY,  0x11, KEY_PROG1 },
	{ KE_KEY,  0x12, KEY_PROG2 },
	{ KE_WIFI, 0x30, 0 },
	{ KE_KEY,  0x31, KEY_MAIL },
	{ KE_KEY,  0x36, KEY_WWW },
};

/*
 * If your machine is not here (which is currently rather likely), please send
 * a list of buttons and their key codes (reported when loading this module
 * with force=1) and the output of dmidecode to $MODULE_AUTHOR.
 */
static struct dmi_system_id dmi_ids[] = {
	{
		.callback = dmi_matched,
		.ident = "Fujitsu-Siemens Amilo Pro V2000",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pro V2000"),
		},
		.driver_data = keymap_fs_amilo_pro_v2000
	},
	{
		.callback = dmi_matched,
		.ident = "Fujitsu-Siemens Amilo M7400",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO M        "),
		},
		.driver_data = keymap_fs_amilo_pro_v2000
	},
	{
		.callback = dmi_matched,
		.ident = "Fujitsu N3510",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
			DMI_MATCH(DMI_PRODUCT_NAME, "N3510"),
		},
		.driver_data = keymap_fujitsu_n3510
	},
	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 1500",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1500"),
		},
		.driver_data = keymap_acer_aspire_1500
	},
	{
		.callback = dmi_matched,
		.ident = "Acer TravelMate 240",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 240"),
		},
		.driver_data = keymap_acer_travelmate_240
	},
        {
		.callback = dmi_matched,
		.ident = "AOpen 1559AS",
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "E2U"),
			DMI_MATCH(DMI_BOARD_NAME, "E2U"),
		},
		.driver_data = keymap_aopen_1559as
	},
	{ NULL, }
};

static int __init select_keymap(void)
{
	if (keymap_name != NULL) {
		if (strcmp (keymap_name, "1557/MS2141") == 0)
			keymap = keymap_wistron_ms2141;
		else {
			printk(KERN_ERR "wistron_btns: Keymap unknown\n");
			return -EINVAL;
		}
	}
	dmi_check_system(dmi_ids);
	if (keymap == NULL) {
		if (!force) {
			printk(KERN_ERR "wistron_btns: System unknown\n");
			return -ENODEV;
		}
		keymap = keymap_empty;
	}
	return 0;
}

 /* Input layer interface */

static struct input_dev *input_dev;

static int __devinit setup_input_dev(void)
{
	const struct key_entry *key;
	int error;

	input_dev = input_allocate_device();
	if (!input_dev)
		return -ENOMEM;

	input_dev->name = "Wistron laptop buttons";
	input_dev->phys = "wistron/input0";
	input_dev->id.bustype = BUS_HOST;
	input_dev->cdev.dev = &wistron_device->dev;

	for (key = keymap; key->type != KE_END; key++) {
		if (key->type == KE_KEY) {
			input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);
			set_bit(key->keycode, input_dev->keybit);
		}
	}

	error = input_register_device(input_dev);
	if (error) {
		input_free_device(input_dev);
		return error;
	}

	return 0;
}

static void report_key(unsigned keycode)
{
	input_report_key(input_dev, keycode, 1);
	input_sync(input_dev);
	input_report_key(input_dev, keycode, 0);
	input_sync(input_dev);
}

 /* Driver core */

static int wifi_enabled;
static int bluetooth_enabled;

static void poll_bios(unsigned long);

static struct timer_list poll_timer = TIMER_INITIALIZER(poll_bios, 0, 0);

static void handle_key(u8 code)
{
	const struct key_entry *key;

	for (key = keymap; key->type != KE_END; key++) {
		if (code == key->code) {
			switch (key->type) {
			case KE_KEY:
				report_key(key->keycode);
				break;

			case KE_WIFI:
				if (have_wifi) {
					wifi_enabled = !wifi_enabled;
					bios_set_state(WIFI, wifi_enabled);
				}
				break;

			case KE_BLUETOOTH:
				if (have_bluetooth) {
					bluetooth_enabled = !bluetooth_enabled;
					bios_set_state(BLUETOOTH, bluetooth_enabled);
				}
				break;

			case KE_END:
			default:
				BUG();
			}
			return;
		}
	}
	printk(KERN_NOTICE "wistron_btns: Unknown key code %02X\n", code);
}

static void poll_bios(unsigned long discard)
{
	u8 qlen;
	u16 val;

	for (;;) {
		qlen = CMOS_READ(cmos_address);
		if (qlen == 0)
			break;
		val = bios_pop_queue();
		if (val != 0 && !discard)
			handle_key((u8)val);
	}

	mod_timer(&poll_timer, jiffies + HZ / POLL_FREQUENCY);
}

static int __devinit wistron_probe(struct platform_device *dev)
{
	int err = setup_input_dev();
	if (err)
		return err;

	bios_attach();
	cmos_address = bios_get_cmos_address();

	if (have_wifi) {
		u16 wifi = bios_get_default_setting(WIFI);
		if (wifi & 1)
			wifi_enabled = (wifi & 2) ? 1 : 0;
		else
			have_wifi = 0;

		if (have_wifi)
			bios_set_state(WIFI, wifi_enabled);
	}

	if (have_bluetooth) {
		u16 bt = bios_get_default_setting(BLUETOOTH);
		if (bt & 1)
			bluetooth_enabled = (bt & 2) ? 1 : 0;
		else
			have_bluetooth = 0;

		if (have_bluetooth)
			bios_set_state(BLUETOOTH, bluetooth_enabled);
	}

	poll_bios(1); /* Flush stale event queue and arm timer */

	return 0;
}

static int __devexit wistron_remove(struct platform_device *dev)
{
	del_timer_sync(&poll_timer);
	input_unregister_device(input_dev);
	bios_detach();

	return 0;
}

#ifdef CONFIG_PM
static int wistron_suspend(struct platform_device *dev, pm_message_t state)
{
	del_timer_sync(&poll_timer);

	if (have_wifi)
		bios_set_state(WIFI, 0);

	if (have_bluetooth)
		bios_set_state(BLUETOOTH, 0);

	return 0;
}

static int wistron_resume(struct platform_device *dev)
{
	if (have_wifi)
		bios_set_state(WIFI, wifi_enabled);

	if (have_bluetooth)
		bios_set_state(BLUETOOTH, bluetooth_enabled);

	poll_bios(1);

	return 0;
}
#else
#define wistron_suspend		NULL
#define wistron_resume		NULL
#endif

static struct platform_driver wistron_driver = {
	.driver		= {
		.name	= "wistron-bios",
		.owner	= THIS_MODULE,
	},
	.probe		= wistron_probe,
	.remove		= __devexit_p(wistron_remove),
	.suspend	= wistron_suspend,
	.resume		= wistron_resume,
};

static int __init wb_module_init(void)
{
	int err;

	err = select_keymap();
	if (err)
		return err;

	err = map_bios();
	if (err)
		return err;

	err = platform_driver_register(&wistron_driver);
	if (err)
		goto err_unmap_bios;

	wistron_device = platform_device_alloc("wistron-bios", -1);
	if (!wistron_device) {
		err = -ENOMEM;
		goto err_unregister_driver;
	}

	err = platform_device_add(wistron_device);
	if (err)
		goto err_free_device;

	return 0;

 err_free_device:
	platform_device_put(wistron_device);
 err_unregister_driver:
	platform_driver_unregister(&wistron_driver);
 err_unmap_bios:
	unmap_bios();

	return err;
}

static void __exit wb_module_exit(void)
{
	platform_device_unregister(wistron_device);
	platform_driver_unregister(&wistron_driver);
	unmap_bios();
}

module_init(wb_module_init);
module_exit(wb_module_exit);
Commit	Line	Data
5fc14680 DT	1	/*
	2	* Wistron laptop button driver
	3	* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
84b256a6	4	* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
a5b0cc80	5	* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
5fc14680 DT	6	*
	7	* You can redistribute and/or modify this program under the terms of the
	8	* GNU General Public License version 2 as published by the Free Software
	9	* Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
	14	* Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; if not, write to the Free Software Foundation, Inc.,
	18	* 59 Temple Place Suite 330, Boston, MA 02111-1307, USA.
	19	*/
	20	#include <asm/io.h>
	21	#include <linux/dmi.h>
	22	#include <linux/init.h>
	23	#include <linux/input.h>
	24	#include <linux/interrupt.h>
	25	#include <linux/kernel.h>
	26	#include <linux/mc146818rtc.h>
	27	#include <linux/module.h>
	28	#include <linux/preempt.h>
	29	#include <linux/string.h>
	30	#include <linux/timer.h>
	31	#include <linux/types.h>
a5b0cc80	32	#include <linux/platform_device.h>
5fc14680 DT	33
	34	/*
	35	* Number of attempts to read data from queue per poll;
	36	* the queue can hold up to 31 entries
	37	*/
	38	#define MAX_POLL_ITERATIONS 64
	39
	40	#define POLL_FREQUENCY 10 /* Number of polls per second */
	41
	42	#if POLL_FREQUENCY > HZ
	43	#error "POLL_FREQUENCY too high"
	44	#endif
	45
84b256a6 BR	46	/* BIOS subsystem IDs */
	47	#define WIFI 0x35
	48	#define BLUETOOTH 0x34
	49
5fc14680 DT	50	MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
	51	MODULE_DESCRIPTION("Wistron laptop button driver");
	52	MODULE_LICENSE("GPL v2");
	53	MODULE_VERSION("0.1");
	54
	55	static int force; /* = 0; */
	56	module_param(force, bool, 0);
	57	MODULE_PARM_DESC(force, "Load even if computer is not in database");
	58
	59	static char keymap_name; / = NULL; */
	60	module_param_named(keymap, keymap_name, charp, 0);
	61	MODULE_PARM_DESC(keymap, "Keymap name, if it can't be autodetected");
	62
a5b0cc80 DT	63	static struct platform_device *wistron_device;
a5b0cc80 DT	64
5fc14680 DT	65	/* BIOS interface implementation */
	66
	67	static void __iomem bios_entry_point; / BIOS routine entry point */
	68	static void __iomem *bios_code_map_base;
	69	static void __iomem *bios_data_map_base;
	70
	71	static u8 cmos_address;
	72
	73	struct regs {
	74	u32 eax, ebx, ecx;
	75	};
	76
	77	static void call_bios(struct regs *regs)
	78	{
	79	unsigned long flags;
	80
	81	preempt_disable();
	82	local_irq_save(flags);
	83	asm volatile ("pushl %%ebp;"
	84	"movl %7, %%ebp;"
	85	"call *%6;"
	86	"popl %%ebp"
	87	: "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx)
	88	: "0" (regs->eax), "1" (regs->ebx), "2" (regs->ecx),
	89	"m" (bios_entry_point), "m" (bios_data_map_base)
	90	: "edx", "edi", "esi", "memory");
	91	local_irq_restore(flags);
	92	preempt_enable();
	93	}
	94
c28c3583	95	static ssize_t __init locate_wistron_bios(void __iomem *base)
5fc14680 DT	96	{
	97	static const unsigned char __initdata signature[] =
	98	{ 0x42, 0x21, 0x55, 0x30 };
c28c3583	99	ssize_t offset;
5fc14680 DT	100
	101	for (offset = 0; offset < 0x10000; offset += 0x10) {
	102	if (check_signature(base + offset, signature,
	103	sizeof(signature)) != 0)
	104	return offset;
	105	}
	106	return -1;
	107	}
	108
	109	static int __init map_bios(void)
	110	{
	111	void __iomem *base;
c28c3583	112	ssize_t offset;
5fc14680 DT	113	u32 entry_point;
	114
	115	base = ioremap(0xF0000, 0x10000); /* Can't fail */
	116	offset = locate_wistron_bios(base);
	117	if (offset < 0) {
	118	printk(KERN_ERR "wistron_btns: BIOS entry point not found\n");
	119	iounmap(base);
	120	return -ENODEV;
	121	}
	122
	123	entry_point = readl(base + offset + 5);
	124	printk(KERN_DEBUG
	125	"wistron_btns: BIOS signature found at %p, entry point %08X\n",
	126	base + offset, entry_point);
	127
	128	if (entry_point >= 0xF0000) {
	129	bios_code_map_base = base;
	130	bios_entry_point = bios_code_map_base + (entry_point & 0xFFFF);
	131	} else {
	132	iounmap(base);
	133	bios_code_map_base = ioremap(entry_point & ~0x3FFF, 0x4000);
	134	if (bios_code_map_base == NULL) {
	135	printk(KERN_ERR
	136	"wistron_btns: Can't map BIOS code at %08X\n",
	137	entry_point & ~0x3FFF);
	138	goto err;
	139	}
	140	bios_entry_point = bios_code_map_base + (entry_point & 0x3FFF);
	141	}
	142	/* The Windows driver maps 0x10000 bytes, we keep only one page... */
	143	bios_data_map_base = ioremap(0x400, 0xc00);
	144	if (bios_data_map_base == NULL) {
	145	printk(KERN_ERR "wistron_btns: Can't map BIOS data\n");
	146	goto err_code;
	147	}
	148	return 0;
	149
	150	err_code:
	151	iounmap(bios_code_map_base);
	152	err:
	153	return -ENOMEM;
	154	}
	155
22a397e2	156	static inline void unmap_bios(void)
5fc14680 DT	157	{
	158	iounmap(bios_code_map_base);
	159	iounmap(bios_data_map_base);
	160	}
	161
	162	/* BIOS calls */
	163
	164	static u16 bios_pop_queue(void)
	165	{
	166	struct regs regs;
	167
	168	memset(&regs, 0, sizeof (regs));
	169	regs.eax = 0x9610;
	170	regs.ebx = 0x061C;
	171	regs.ecx = 0x0000;
	172	call_bios(&regs);
	173
	174	return regs.eax;
	175	}
	176
e7c3aad5	177	static void __devinit bios_attach(void)
5fc14680 DT	178	{
	179	struct regs regs;
	180
	181	memset(&regs, 0, sizeof (regs));
	182	regs.eax = 0x9610;
	183	regs.ebx = 0x012E;
	184	call_bios(&regs);
	185	}
	186
22a397e2	187	static void bios_detach(void)
5fc14680 DT	188	{
	189	struct regs regs;
	190
	191	memset(&regs, 0, sizeof (regs));
	192	regs.eax = 0x9610;
	193	regs.ebx = 0x002E;
	194	call_bios(&regs);
	195	}
	196
e7c3aad5	197	static u8 __devinit bios_get_cmos_address(void)
5fc14680 DT	198	{
	199	struct regs regs;
	200
	201	memset(&regs, 0, sizeof (regs));
	202	regs.eax = 0x9610;
	203	regs.ebx = 0x051C;
	204	call_bios(&regs);
	205
	206	return regs.ecx;
	207	}
	208
e7c3aad5	209	static u16 __devinit bios_get_default_setting(u8 subsys)
5fc14680 DT	210	{
	211	struct regs regs;
	212
	213	memset(&regs, 0, sizeof (regs));
	214	regs.eax = 0x9610;
84b256a6	215	regs.ebx = 0x0200 \| subsys;
5fc14680 DT	216	call_bios(&regs);
	217
	218	return regs.eax;
	219	}
	220
84b256a6	221	static void bios_set_state(u8 subsys, int enable)
5fc14680 DT	222	{
	223	struct regs regs;
	224
	225	memset(&regs, 0, sizeof (regs));
	226	regs.eax = 0x9610;
84b256a6	227	regs.ebx = (enable ? 0x0100 : 0x0000) \| subsys;
5fc14680 DT	228	call_bios(&regs);
	229	}
	230
84b256a6	231	/* Hardware database */
5fc14680 DT	232
	233	struct key_entry {
	234	char type; /* See KE_* below */
	235	u8 code;
	236	unsigned keycode; /* For KE_KEY */
	237	};
	238
84b256a6	239	enum { KE_END, KE_KEY, KE_WIFI, KE_BLUETOOTH };
5fc14680 DT	240
	241	static const struct key_entry keymap; / = NULL; Current key map */
	242	static int have_wifi;
84b256a6	243	static int have_bluetooth;
5fc14680 DT	244
	245	static int __init dmi_matched(struct dmi_system_id *dmi)
	246	{
	247	const struct key_entry *key;
	248
	249	keymap = dmi->driver_data;
	250	for (key = keymap; key->type != KE_END; key++) {
	251	if (key->type == KE_WIFI) {
	252	have_wifi = 1;
	253	break;
84b256a6 BR	254	} else if (key->type == KE_BLUETOOTH) {
	255	have_bluetooth = 1;
	256	break;
5fc14680 DT	257	}
	258	}
	259	return 1;
	260	}
	261
	262	static struct key_entry keymap_empty[] = {
	263	{ KE_END, 0 }
	264	};
	265
	266	static struct key_entry keymap_fs_amilo_pro_v2000[] = {
	267	{ KE_KEY, 0x01, KEY_HELP },
	268	{ KE_KEY, 0x11, KEY_PROG1 },
	269	{ KE_KEY, 0x12, KEY_PROG2 },
	270	{ KE_WIFI, 0x30, 0 },
	271	{ KE_KEY, 0x31, KEY_MAIL },
	272	{ KE_KEY, 0x36, KEY_WWW },
	273	{ KE_END, 0 }
	274	};
	275
e2aa507a JRR	276	static struct key_entry keymap_fujitsu_n3510[] = {
	277	{ KE_KEY, 0x11, KEY_PROG1 },
	278	{ KE_KEY, 0x12, KEY_PROG2 },
	279	{ KE_KEY, 0x36, KEY_WWW },
	280	{ KE_KEY, 0x31, KEY_MAIL },
	281	{ KE_KEY, 0x71, KEY_STOPCD },
	282	{ KE_KEY, 0x72, KEY_PLAYPAUSE },
	283	{ KE_KEY, 0x74, KEY_REWIND },
	284	{ KE_KEY, 0x78, KEY_FORWARD },
	285	{ KE_END, 0 }
	286	};
	287
5fc14680 DT	288	static struct key_entry keymap_wistron_ms2141[] = {
	289	{ KE_KEY, 0x11, KEY_PROG1 },
	290	{ KE_KEY, 0x12, KEY_PROG2 },
	291	{ KE_WIFI, 0x30, 0 },
	292	{ KE_KEY, 0x22, KEY_REWIND },
	293	{ KE_KEY, 0x23, KEY_FORWARD },
	294	{ KE_KEY, 0x24, KEY_PLAYPAUSE },
	295	{ KE_KEY, 0x25, KEY_STOPCD },
	296	{ KE_KEY, 0x31, KEY_MAIL },
	297	{ KE_KEY, 0x36, KEY_WWW },
	298	{ KE_END, 0 }
	299	};
	300
84b256a6 BR	301	static struct key_entry keymap_acer_aspire_1500[] = {
	302	{ KE_KEY, 0x11, KEY_PROG1 },
	303	{ KE_KEY, 0x12, KEY_PROG2 },
	304	{ KE_WIFI, 0x30, 0 },
	305	{ KE_KEY, 0x31, KEY_MAIL },
	306	{ KE_KEY, 0x36, KEY_WWW },
	307	{ KE_BLUETOOTH, 0x44, 0 },
	308	{ KE_END, 0 }
	309	};
	310
74a89c96 AN	311	static struct key_entry keymap_acer_travelmate_240[] = {
	312	{ KE_KEY, 0x31, KEY_MAIL },
	313	{ KE_KEY, 0x36, KEY_WWW },
	314	{ KE_KEY, 0x11, KEY_PROG1 },
	315	{ KE_KEY, 0x12, KEY_PROG2 },
	316	{ KE_BLUETOOTH, 0x44, 0 },
	317	{ KE_WIFI, 0x30, 0 },
	318	{ KE_END, 0 }
	319	};
	320
e107b8ee	321	static struct key_entry keymap_aopen_1559as[] = {
	322	{ KE_KEY, 0x01, KEY_HELP },
	323	{ KE_KEY, 0x06, KEY_PROG3 },
	324	{ KE_KEY, 0x11, KEY_PROG1 },
	325	{ KE_KEY, 0x12, KEY_PROG2 },
	326	{ KE_WIFI, 0x30, 0 },
	327	{ KE_KEY, 0x31, KEY_MAIL },
	328	{ KE_KEY, 0x36, KEY_WWW },
	329	};
	330
5fc14680 DT	331	/*
	332	* If your machine is not here (which is currently rather likely), please send
	333	* a list of buttons and their key codes (reported when loading this module
	334	* with force=1) and the output of dmidecode to $MODULE_AUTHOR.
	335	*/
	336	static struct dmi_system_id dmi_ids[] = {
	337	{
	338	.callback = dmi_matched,
	339	.ident = "Fujitsu-Siemens Amilo Pro V2000",
	340	.matches = {
	341	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	342	DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pro V2000"),
	343	},
	344	.driver_data = keymap_fs_amilo_pro_v2000
	345	},
8a1b1708 SR	346	{
	347	.callback = dmi_matched,
	348	.ident = "Fujitsu-Siemens Amilo M7400",
	349	.matches = {
	350	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
	351	DMI_MATCH(DMI_PRODUCT_NAME, "AMILO M "),
	352	},
	353	.driver_data = keymap_fs_amilo_pro_v2000
	354	},
e2aa507a JRR	355	{
	356	.callback = dmi_matched,
	357	.ident = "Fujitsu N3510",
	358	.matches = {
	359	DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
	360	DMI_MATCH(DMI_PRODUCT_NAME, "N3510"),
	361	},
	362	.driver_data = keymap_fujitsu_n3510
	363	},
84b256a6 BR	364	{
	365	.callback = dmi_matched,
	366	.ident = "Acer Aspire 1500",
	367	.matches = {
	368	DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
	369	DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1500"),
	370	},
	371	.driver_data = keymap_acer_aspire_1500
	372	},
74a89c96 AN	373	{
	374	.callback = dmi_matched,
	375	.ident = "Acer TravelMate 240",
	376	.matches = {
	377	DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
	378	DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 240"),
	379	},
	380	.driver_data = keymap_acer_travelmate_240
	381	},
e107b8ee	382	{
	383	.callback = dmi_matched,
	384	.ident = "AOpen 1559AS",
	385	.matches = {
	386	DMI_MATCH(DMI_PRODUCT_NAME, "E2U"),
	387	DMI_MATCH(DMI_BOARD_NAME, "E2U"),
	388	},
	389	.driver_data = keymap_aopen_1559as
	390	},
81f0a91e	391	{ NULL, }
5fc14680 DT	392	};
	393
	394	static int __init select_keymap(void)
	395	{
	396	if (keymap_name != NULL) {
	397	if (strcmp (keymap_name, "1557/MS2141") == 0)
	398	keymap = keymap_wistron_ms2141;
	399	else {
	400	printk(KERN_ERR "wistron_btns: Keymap unknown\n");
	401	return -EINVAL;
	402	}
	403	}
	404	dmi_check_system(dmi_ids);
	405	if (keymap == NULL) {
	406	if (!force) {
	407	printk(KERN_ERR "wistron_btns: System unknown\n");
	408	return -ENODEV;
	409	}
	410	keymap = keymap_empty;
	411	}
	412	return 0;
	413	}
	414
	415	/* Input layer interface */
	416
22a397e2	417	static struct input_dev *input_dev;
5fc14680	418
e7c3aad5	419	static int __devinit setup_input_dev(void)
5fc14680 DT	420	{
5fc14680 DT	421	const struct key_entry *key;
22a397e2 DT	422	int error;
	423
	424	input_dev = input_allocate_device();
	425	if (!input_dev)
	426	return -ENOMEM;
	427
	428	input_dev->name = "Wistron laptop buttons";
	429	input_dev->phys = "wistron/input0";
	430	input_dev->id.bustype = BUS_HOST;
a5b0cc80	431	input_dev->cdev.dev = &wistron_device->dev;
5fc14680 DT	432
	433	for (key = keymap; key->type != KE_END; key++) {
	434	if (key->type == KE_KEY) {
22a397e2 DT	435	input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);
22a397e2 DT	436	set_bit(key->keycode, input_dev->keybit);
5fc14680 DT	437	}
	438	}
	439
22a397e2 DT	440	error = input_register_device(input_dev);
	441	if (error) {
	442	input_free_device(input_dev);
	443	return error;
	444	}
	445
	446	return 0;
5fc14680 DT	447	}
	448
	449	static void report_key(unsigned keycode)
	450	{
22a397e2 DT	451	input_report_key(input_dev, keycode, 1);
	452	input_sync(input_dev);
	453	input_report_key(input_dev, keycode, 0);
	454	input_sync(input_dev);
5fc14680 DT	455	}
	456
	457	/* Driver core */
	458
	459	static int wifi_enabled;
84b256a6	460	static int bluetooth_enabled;
5fc14680 DT	461
	462	static void poll_bios(unsigned long);
	463
	464	static struct timer_list poll_timer = TIMER_INITIALIZER(poll_bios, 0, 0);
	465
	466	static void handle_key(u8 code)
	467	{
	468	const struct key_entry *key;
	469
	470	for (key = keymap; key->type != KE_END; key++) {
	471	if (code == key->code) {
	472	switch (key->type) {
	473	case KE_KEY:
	474	report_key(key->keycode);
	475	break;
	476
	477	case KE_WIFI:
	478	if (have_wifi) {
	479	wifi_enabled = !wifi_enabled;
84b256a6 BR	480	bios_set_state(WIFI, wifi_enabled);
	481	}
	482	break;
	483
	484	case KE_BLUETOOTH:
	485	if (have_bluetooth) {
	486	bluetooth_enabled = !bluetooth_enabled;
	487	bios_set_state(BLUETOOTH, bluetooth_enabled);
5fc14680 DT	488	}
	489	break;
	490
	491	case KE_END:
	492	default:
	493	BUG();
	494	}
	495	return;
	496	}
	497	}
	498	printk(KERN_NOTICE "wistron_btns: Unknown key code %02X\n", code);
	499	}
	500
	501	static void poll_bios(unsigned long discard)
	502	{
	503	u8 qlen;
	504	u16 val;
	505
	506	for (;;) {
	507	qlen = CMOS_READ(cmos_address);
	508	if (qlen == 0)
	509	break;
	510	val = bios_pop_queue();
	511	if (val != 0 && !discard)
	512	handle_key((u8)val);
	513	}
	514
	515	mod_timer(&poll_timer, jiffies + HZ / POLL_FREQUENCY);
	516	}
	517
e7c3aad5 DT	518	static int __devinit wistron_probe(struct platform_device *dev)
	519	{
	520	int err = setup_input_dev();
	521	if (err)
	522	return err;
	523
	524	bios_attach();
	525	cmos_address = bios_get_cmos_address();
	526
	527	if (have_wifi) {
	528	u16 wifi = bios_get_default_setting(WIFI);
	529	if (wifi & 1)
	530	wifi_enabled = (wifi & 2) ? 1 : 0;
	531	else
	532	have_wifi = 0;
	533
	534	if (have_wifi)
	535	bios_set_state(WIFI, wifi_enabled);
	536	}
	537
	538	if (have_bluetooth) {
	539	u16 bt = bios_get_default_setting(BLUETOOTH);
	540	if (bt & 1)
	541	bluetooth_enabled = (bt & 2) ? 1 : 0;
	542	else
	543	have_bluetooth = 0;
	544
	545	if (have_bluetooth)
	546	bios_set_state(BLUETOOTH, bluetooth_enabled);
	547	}
	548
	549	poll_bios(1); /* Flush stale event queue and arm timer */
	550
	551	return 0;
	552	}
	553
	554	static int __devexit wistron_remove(struct platform_device *dev)
	555	{
	556	del_timer_sync(&poll_timer);
	557	input_unregister_device(input_dev);
	558	bios_detach();
	559
	560	return 0;
	561	}
	562
	563	#ifdef CONFIG_PM
a5b0cc80 DT	564	static int wistron_suspend(struct platform_device *dev, pm_message_t state)
	565	{
	566	del_timer_sync(&poll_timer);
	567
e753b650 MT	568	if (have_wifi)
	569	bios_set_state(WIFI, 0);
	570
	571	if (have_bluetooth)
	572	bios_set_state(BLUETOOTH, 0);
	573
a5b0cc80 DT	574	return 0;
	575	}
	576
	577	static int wistron_resume(struct platform_device *dev)
	578	{
	579	if (have_wifi)
	580	bios_set_state(WIFI, wifi_enabled);
	581
	582	if (have_bluetooth)
	583	bios_set_state(BLUETOOTH, bluetooth_enabled);
	584
	585	poll_bios(1);
	586
	587	return 0;
	588	}
e7c3aad5 DT	589	#else
	590	#define wistron_suspend NULL
	591	#define wistron_resume NULL
	592	#endif
a5b0cc80 DT	593
a5b0cc80 DT	594	static struct platform_driver wistron_driver = {
a5b0cc80 DT	595	.driver = {
a5b0cc80 DT	596	.name = "wistron-bios",
e7c3aad5	597	.owner = THIS_MODULE,
a5b0cc80	598	},
e7c3aad5 DT	599	.probe = wistron_probe,
	600	.remove = __devexit_p(wistron_remove),
	601	.suspend = wistron_suspend,
	602	.resume = wistron_resume,
a5b0cc80 DT	603	};
a5b0cc80 DT	604
5fc14680 DT	605	static int __init wb_module_init(void)
	606	{
	607	int err;
	608
	609	err = select_keymap();
	610	if (err)
	611	return err;
22a397e2	612
5fc14680 DT	613	err = map_bios();
	614	if (err)
	615	return err;
22a397e2	616
a5b0cc80 DT	617	err = platform_driver_register(&wistron_driver);
a5b0cc80 DT	618	if (err)
e7c3aad5	619	goto err_unmap_bios;
a5b0cc80	620
e7c3aad5 DT	621	wistron_device = platform_device_alloc("wistron-bios", -1);
	622	if (!wistron_device) {
	623	err = -ENOMEM;
a5b0cc80 DT	624	goto err_unregister_driver;
	625	}
	626
e7c3aad5	627	err = platform_device_add(wistron_device);
a5b0cc80	628	if (err)
e7c3aad5	629	goto err_free_device;
5fc14680 DT	630
5fc14680 DT	631	return 0;
a5b0cc80	632
e7c3aad5 DT	633	err_free_device:
e7c3aad5 DT	634	platform_device_put(wistron_device);
a5b0cc80 DT	635	err_unregister_driver:
a5b0cc80 DT	636	platform_driver_unregister(&wistron_driver);
e7c3aad5	637	err_unmap_bios:
a5b0cc80 DT	638	unmap_bios();
	639
	640	return err;
5fc14680 DT	641	}
	642
	643	static void __exit wb_module_exit(void)
	644	{
a5b0cc80 DT	645	platform_device_unregister(wistron_device);
a5b0cc80 DT	646	platform_driver_unregister(&wistron_driver);
5fc14680 DT	647	unmap_bios();
	648	}
	649
	650	module_init(wb_module_init);
	651	module_exit(wb_module_exit);