// SPDX-License-Identifier: GPL-2.0-only/* * 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> */#include <linux/io.h>#include <linux/dmi.h>#include <linux/init.h>#include <linux/input.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();} 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 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 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 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 */ #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;} 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 },                      /* satellite 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 */

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