Release 4.11 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 <linux/io.h>
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/input-polldev.h>
#include <linux/input/sparse-keymap.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/mc146818rtc.h>
#include <linux/module.h>
#include <linux/preempt.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/leds.h>

/* How often we poll keys - msecs */

#define POLL_INTERVAL_DEFAULT	500 
/* when idle */

#define POLL_INTERVAL_BURST	100 
/* when a key was recently pressed */

/* BIOS subsystem IDs */

#define WIFI		0x35

#define BLUETOOTH	0x34

#define MAIL_LED	0x31

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


static bool 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 [generic, 1557/MS2141]");


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();
}

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static ssize_t __init locate_wistron_bios(void __iomem *base)
{
	static 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;
}

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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;
}

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

 
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/* 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;
}

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static void bios_attach(void)
{
	struct regs regs;

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

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static void bios_detach(void)
{
	struct regs regs;

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

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static u8 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;
}

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static u16 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;
}

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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);
}

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/* Hardware database */


#define KE_WIFI		(KE_LAST + 1)

#define KE_BLUETOOTH	(KE_LAST + 2)


#define FE_MAIL_LED 0x01

#define FE_WIFI_LED 0x02

#define FE_UNTESTED 0x80


static struct key_entry *keymap; 
/* = NULL; Current key map */

static bool have_wifi;

static bool have_bluetooth;

static int leds_present;	
/* bitmask of leds present */



static int __init dmi_matched(const 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 = true;
		else if (key->type == KE_BLUETOOTH)
			have_bluetooth = true;
	}
	leds_present = key->code & (FE_MAIL_LED | FE_WIFI_LED);

	return 1;
}

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


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


static struct key_entry keymap_fs_amilo_pro_v3505[] __initdata = {
	{ KE_KEY,       0x01, {KEY_HELP} },          /* Fn+F1 */
	{ KE_KEY,       0x06, {KEY_DISPLAYTOGGLE} }, /* Fn+F4 */
	{ KE_BLUETOOTH, 0x30 },                      /* Fn+F10 */
	{ KE_KEY,       0x31, {KEY_MAIL} },          /* mail button */
	{ KE_KEY,       0x36, {KEY_WWW} },           /* www button */
	{ KE_WIFI,      0x78 },                      /* satellite dish button */
	{ KE_END,       0 }
};


static struct key_entry keymap_fs_amilo_pro_v8210[] __initdata = {
	{ KE_KEY,       0x01, {KEY_HELP} },          /* Fn+F1 */
	{ KE_KEY,       0x06, {KEY_DISPLAYTOGGLE} }, /* Fn+F4 */
	{ KE_BLUETOOTH, 0x30 },                      /* Fn+F10 */
	{ KE_KEY,       0x31, {KEY_MAIL} },          /* mail button */
	{ KE_KEY,       0x36, {KEY_WWW} },           /* www button */
	{ KE_WIFI,      0x78 },                      /* satelite dish button */
	{ KE_END,       FE_WIFI_LED }
};


static struct key_entry keymap_fujitsu_n3510[] __initdata = {
	{ 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_ms2111[] __initdata = {
	{ KE_KEY,  0x11, {KEY_PROG1} },
	{ KE_KEY,  0x12, {KEY_PROG2} },
	{ KE_KEY,  0x13, {KEY_PROG3} },
	{ KE_KEY,  0x31, {KEY_MAIL} },
	{ KE_KEY,  0x36, {KEY_WWW} },
	{ KE_END, FE_MAIL_LED }
};


static struct key_entry keymap_wistron_md40100[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_KEY, 0x37, {KEY_DISPLAYTOGGLE} }, /* Display on/off */
	{ KE_END, FE_MAIL_LED | FE_WIFI_LED | FE_UNTESTED }
};


static struct key_entry keymap_wistron_ms2141[] __initdata = {
	{ KE_KEY,  0x11, {KEY_PROG1} },
	{ KE_KEY,  0x12, {KEY_PROG2} },
	{ KE_WIFI, 0x30 },
	{ 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[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x03, {KEY_POWER} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_WIFI, 0x30 },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_KEY, 0x49, {KEY_CONFIG} },
	{ KE_BLUETOOTH, 0x44 },
	{ KE_END, FE_UNTESTED }
};


static struct key_entry keymap_acer_aspire_1600[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x03, {KEY_POWER} },
	{ KE_KEY, 0x08, {KEY_MUTE} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x13, {KEY_PROG3} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_KEY, 0x49, {KEY_CONFIG} },
	{ KE_WIFI, 0x30 },
	{ KE_BLUETOOTH, 0x44 },
	{ KE_END, FE_MAIL_LED | FE_UNTESTED }
};

/* 3020 has been tested */

static struct key_entry keymap_acer_aspire_5020[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x03, {KEY_POWER} },
	{ KE_KEY, 0x05, {KEY_SWITCHVIDEOMODE} }, /* Display selection */
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_KEY, 0x6a, {KEY_CONFIG} },
	{ KE_WIFI, 0x30 },
	{ KE_BLUETOOTH, 0x44 },
	{ KE_END, FE_MAIL_LED | FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_2410[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x6d, {KEY_POWER} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_KEY, 0x6a, {KEY_CONFIG} },
	{ KE_WIFI, 0x30 },
	{ KE_BLUETOOTH, 0x44 },
	{ KE_END, FE_MAIL_LED | FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_110[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x03, {KEY_POWER} },
	{ KE_KEY, 0x08, {KEY_MUTE} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x20, {KEY_VOLUMEUP} },
	{ KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_SW, 0x4a, {.sw = {SW_LID, 1}} }, /* lid close */
	{ KE_SW, 0x4b, {.sw = {SW_LID, 0}} }, /* lid open */
	{ KE_WIFI, 0x30 },
	{ KE_END, FE_MAIL_LED | FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_300[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x03, {KEY_POWER} },
	{ KE_KEY, 0x08, {KEY_MUTE} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x20, {KEY_VOLUMEUP} },
	{ KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_WIFI, 0x30 },
	{ KE_BLUETOOTH, 0x44 },
	{ KE_END, FE_MAIL_LED | FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_380[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x03, {KEY_POWER} }, /* not 370 */
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x13, {KEY_PROG3} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_WIFI, 0x30 },
	{ KE_END, FE_MAIL_LED | FE_UNTESTED }
};

/* unusual map */

static struct key_entry keymap_acer_travelmate_220[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x11, {KEY_MAIL} },
	{ KE_KEY, 0x12, {KEY_WWW} },
	{ KE_KEY, 0x13, {KEY_PROG2} },
	{ KE_KEY, 0x31, {KEY_PROG1} },
	{ KE_END, FE_WIFI_LED | FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_230[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_END, FE_WIFI_LED | FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_240[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x03, {KEY_POWER} },
	{ KE_KEY, 0x08, {KEY_MUTE} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_BLUETOOTH, 0x44 },
	{ KE_WIFI, 0x30 },
	{ KE_END, FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_350[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x13, {KEY_MAIL} },
	{ KE_KEY, 0x14, {KEY_PROG3} },
	{ KE_KEY, 0x15, {KEY_WWW} },
	{ KE_END, FE_MAIL_LED | FE_WIFI_LED | FE_UNTESTED }
};


static struct key_entry keymap_acer_travelmate_360[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x13, {KEY_MAIL} },
	{ KE_KEY, 0x14, {KEY_PROG3} },
	{ KE_KEY, 0x15, {KEY_WWW} },
	{ KE_KEY, 0x40, {KEY_WLAN} },
	{ KE_END, FE_WIFI_LED | FE_UNTESTED } /* no mail led */
};

/* Wifi subsystem only activates the led. Therefore we need to pass
 * wifi event as a normal key, then userspace can really change the wifi state.
 * TODO we need to export led state to userspace (wifi and mail) */

static struct key_entry keymap_acer_travelmate_610[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x13, {KEY_PROG3} },
	{ KE_KEY, 0x14, {KEY_MAIL} },
	{ KE_KEY, 0x15, {KEY_WWW} },
	{ KE_KEY, 0x40, {KEY_WLAN} },
	{ KE_END, FE_MAIL_LED | FE_WIFI_LED }
};


static struct key_entry keymap_acer_travelmate_630[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x02, {KEY_CONFIG} },
	{ KE_KEY, 0x03, {KEY_POWER} },
	{ KE_KEY, 0x08, {KEY_MUTE} }, /* not 620 */
	{ KE_KEY, 0x11, {KEY_PROG1} },
	{ KE_KEY, 0x12, {KEY_PROG2} },
	{ KE_KEY, 0x13, {KEY_PROG3} },
	{ KE_KEY, 0x20, {KEY_VOLUMEUP} },
	{ KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
	{ KE_KEY, 0x31, {KEY_MAIL} },
	{ KE_KEY, 0x36, {KEY_WWW} },
	{ KE_WIFI, 0x30 },
	{ KE_END, FE_MAIL_LED | FE_UNTESTED }
};


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


static struct key_entry keymap_fs_amilo_d88x0[] __initdata = {
	{ KE_KEY, 0x01, {KEY_HELP} },
	{ KE_KEY, 0x08, {KEY_MUTE} },
	{ KE_KEY, 0x31, {