wistron_btns.c

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/*
 * Wistron laptop button driver
 * Copyright (C) 2005 Miloslav Trmac <[e-mail]>
 * Copyright (C) 2005 Bernhard Rosenkraenzer <[e-mail]>
 * Copyright (C) 2005 Dmitry Torokhov <[e-mail]>
 *
 * 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/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/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 <[e-mail]>");
MODULE_DESCRIPTION("Wistron laptop button driver");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.3");

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 [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();
}

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;
}

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;
	union {
		u16 keycode;		/* For KE_KEY */
		struct {		/* For KE_SW */
			u8 code;
			u8 value;
		} sw;
	};
};

enum { KE_END, KE_KEY, KE_SW, KE_WIFI, KE_BLUETOOTH };

#define FE_MAIL_LED 0x01
#define FE_WIFI_LED 0x02
#define FE_UNTESTED 0x80

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

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 = 1;
		else if (key->type == KE_BLUETOOTH)
			have_bluetooth = 1;
	}
	have_leds = key->code & (FE_MAIL_LED | FE_WIFI_LED);

	return 1;
}

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_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} },