677 lines
15 KiB
C
677 lines
15 KiB
C
/*
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* Wistron laptop button driver
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* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
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* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
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* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
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*
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* You can redistribute and/or modify this program under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/io.h>
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#include <linux/dmi.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mc146818rtc.h>
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#include <linux/module.h>
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#include <linux/preempt.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/types.h>
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#include <linux/platform_device.h>
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/*
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* Number of attempts to read data from queue per poll;
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* the queue can hold up to 31 entries
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*/
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#define MAX_POLL_ITERATIONS 64
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#define POLL_FREQUENCY 10 /* Number of polls per second */
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#if POLL_FREQUENCY > HZ
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#error "POLL_FREQUENCY too high"
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#endif
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/* BIOS subsystem IDs */
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#define WIFI 0x35
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#define BLUETOOTH 0x34
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MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
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MODULE_DESCRIPTION("Wistron laptop button driver");
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MODULE_LICENSE("GPL v2");
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MODULE_VERSION("0.1");
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static int force; /* = 0; */
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module_param(force, bool, 0);
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MODULE_PARM_DESC(force, "Load even if computer is not in database");
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static char *keymap_name; /* = NULL; */
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module_param_named(keymap, keymap_name, charp, 0);
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MODULE_PARM_DESC(keymap, "Keymap name, if it can't be autodetected");
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static struct platform_device *wistron_device;
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/* BIOS interface implementation */
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static void __iomem *bios_entry_point; /* BIOS routine entry point */
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static void __iomem *bios_code_map_base;
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static void __iomem *bios_data_map_base;
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static u8 cmos_address;
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struct regs {
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u32 eax, ebx, ecx;
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};
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static void call_bios(struct regs *regs)
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{
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unsigned long flags;
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preempt_disable();
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local_irq_save(flags);
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asm volatile ("pushl %%ebp;"
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"movl %7, %%ebp;"
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"call *%6;"
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"popl %%ebp"
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: "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx)
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: "0" (regs->eax), "1" (regs->ebx), "2" (regs->ecx),
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"m" (bios_entry_point), "m" (bios_data_map_base)
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: "edx", "edi", "esi", "memory");
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local_irq_restore(flags);
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preempt_enable();
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}
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static ssize_t __init locate_wistron_bios(void __iomem *base)
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{
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static unsigned char __initdata signature[] =
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{ 0x42, 0x21, 0x55, 0x30 };
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ssize_t offset;
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for (offset = 0; offset < 0x10000; offset += 0x10) {
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if (check_signature(base + offset, signature,
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sizeof(signature)) != 0)
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return offset;
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}
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return -1;
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}
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static int __init map_bios(void)
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{
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void __iomem *base;
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ssize_t offset;
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u32 entry_point;
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base = ioremap(0xF0000, 0x10000); /* Can't fail */
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offset = locate_wistron_bios(base);
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if (offset < 0) {
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printk(KERN_ERR "wistron_btns: BIOS entry point not found\n");
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iounmap(base);
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return -ENODEV;
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}
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entry_point = readl(base + offset + 5);
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printk(KERN_DEBUG
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"wistron_btns: BIOS signature found at %p, entry point %08X\n",
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base + offset, entry_point);
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if (entry_point >= 0xF0000) {
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bios_code_map_base = base;
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bios_entry_point = bios_code_map_base + (entry_point & 0xFFFF);
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} else {
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iounmap(base);
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bios_code_map_base = ioremap(entry_point & ~0x3FFF, 0x4000);
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if (bios_code_map_base == NULL) {
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printk(KERN_ERR
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"wistron_btns: Can't map BIOS code at %08X\n",
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entry_point & ~0x3FFF);
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goto err;
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}
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bios_entry_point = bios_code_map_base + (entry_point & 0x3FFF);
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}
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/* The Windows driver maps 0x10000 bytes, we keep only one page... */
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bios_data_map_base = ioremap(0x400, 0xc00);
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if (bios_data_map_base == NULL) {
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printk(KERN_ERR "wistron_btns: Can't map BIOS data\n");
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goto err_code;
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}
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return 0;
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err_code:
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iounmap(bios_code_map_base);
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err:
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return -ENOMEM;
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}
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static inline void unmap_bios(void)
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{
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iounmap(bios_code_map_base);
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iounmap(bios_data_map_base);
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}
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/* BIOS calls */
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static u16 bios_pop_queue(void)
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{
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struct regs regs;
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memset(®s, 0, sizeof (regs));
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regs.eax = 0x9610;
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regs.ebx = 0x061C;
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regs.ecx = 0x0000;
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call_bios(®s);
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return regs.eax;
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}
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static void __devinit bios_attach(void)
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{
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struct regs regs;
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memset(®s, 0, sizeof (regs));
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regs.eax = 0x9610;
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regs.ebx = 0x012E;
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call_bios(®s);
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}
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static void bios_detach(void)
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{
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struct regs regs;
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memset(®s, 0, sizeof (regs));
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regs.eax = 0x9610;
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regs.ebx = 0x002E;
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call_bios(®s);
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}
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static u8 __devinit bios_get_cmos_address(void)
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{
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struct regs regs;
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memset(®s, 0, sizeof (regs));
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regs.eax = 0x9610;
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regs.ebx = 0x051C;
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call_bios(®s);
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return regs.ecx;
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}
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static u16 __devinit bios_get_default_setting(u8 subsys)
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{
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struct regs regs;
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memset(®s, 0, sizeof (regs));
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regs.eax = 0x9610;
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regs.ebx = 0x0200 | subsys;
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call_bios(®s);
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return regs.eax;
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}
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static void bios_set_state(u8 subsys, int enable)
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{
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struct regs regs;
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memset(®s, 0, sizeof (regs));
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regs.eax = 0x9610;
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regs.ebx = (enable ? 0x0100 : 0x0000) | subsys;
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call_bios(®s);
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}
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/* Hardware database */
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struct key_entry {
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char type; /* See KE_* below */
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u8 code;
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unsigned keycode; /* For KE_KEY */
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};
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enum { KE_END, KE_KEY, KE_WIFI, KE_BLUETOOTH };
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static const struct key_entry *keymap; /* = NULL; Current key map */
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static int have_wifi;
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static int have_bluetooth;
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static int __init dmi_matched(struct dmi_system_id *dmi)
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{
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const struct key_entry *key;
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keymap = dmi->driver_data;
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for (key = keymap; key->type != KE_END; key++) {
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if (key->type == KE_WIFI)
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have_wifi = 1;
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else if (key->type == KE_BLUETOOTH)
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have_bluetooth = 1;
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}
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return 1;
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}
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static struct key_entry keymap_empty[] = {
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{ KE_END, 0 }
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};
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static struct key_entry keymap_fs_amilo_pro_v2000[] = {
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{ KE_KEY, 0x01, KEY_HELP },
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{ KE_KEY, 0x11, KEY_PROG1 },
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{ KE_KEY, 0x12, KEY_PROG2 },
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{ KE_WIFI, 0x30, 0 },
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{ KE_KEY, 0x31, KEY_MAIL },
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{ KE_KEY, 0x36, KEY_WWW },
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{ KE_END, 0 }
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};
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static struct key_entry keymap_fujitsu_n3510[] = {
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{ KE_KEY, 0x11, KEY_PROG1 },
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{ KE_KEY, 0x12, KEY_PROG2 },
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{ KE_KEY, 0x36, KEY_WWW },
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{ KE_KEY, 0x31, KEY_MAIL },
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{ KE_KEY, 0x71, KEY_STOPCD },
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{ KE_KEY, 0x72, KEY_PLAYPAUSE },
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{ KE_KEY, 0x74, KEY_REWIND },
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{ KE_KEY, 0x78, KEY_FORWARD },
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{ KE_END, 0 }
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};
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static struct key_entry keymap_wistron_ms2111[] = {
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{ KE_KEY, 0x11, KEY_PROG1 },
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{ KE_KEY, 0x12, KEY_PROG2 },
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{ KE_KEY, 0x13, KEY_PROG3 },
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{ KE_KEY, 0x31, KEY_MAIL },
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{ KE_KEY, 0x36, KEY_WWW },
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{ KE_END, 0 }
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};
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static struct key_entry keymap_wistron_ms2141[] = {
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{ KE_KEY, 0x11, KEY_PROG1 },
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{ KE_KEY, 0x12, KEY_PROG2 },
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{ KE_WIFI, 0x30, 0 },
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{ KE_KEY, 0x22, KEY_REWIND },
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{ KE_KEY, 0x23, KEY_FORWARD },
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{ KE_KEY, 0x24, KEY_PLAYPAUSE },
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{ KE_KEY, 0x25, KEY_STOPCD },
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{ KE_KEY, 0x31, KEY_MAIL },
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{ KE_KEY, 0x36, KEY_WWW },
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{ KE_END, 0 }
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};
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static struct key_entry keymap_acer_aspire_1500[] = {
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{ KE_KEY, 0x11, KEY_PROG1 },
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{ KE_KEY, 0x12, KEY_PROG2 },
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{ KE_WIFI, 0x30, 0 },
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{ KE_KEY, 0x31, KEY_MAIL },
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{ KE_KEY, 0x36, KEY_WWW },
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{ KE_BLUETOOTH, 0x44, 0 },
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{ KE_END, 0 }
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};
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static struct key_entry keymap_acer_travelmate_240[] = {
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{ KE_KEY, 0x31, KEY_MAIL },
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{ KE_KEY, 0x36, KEY_WWW },
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{ KE_KEY, 0x11, KEY_PROG1 },
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{ KE_KEY, 0x12, KEY_PROG2 },
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{ KE_BLUETOOTH, 0x44, 0 },
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{ KE_WIFI, 0x30, 0 },
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{ KE_END, 0 }
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};
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static struct key_entry keymap_aopen_1559as[] = {
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{ KE_KEY, 0x01, KEY_HELP },
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{ KE_KEY, 0x06, KEY_PROG3 },
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{ KE_KEY, 0x11, KEY_PROG1 },
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{ KE_KEY, 0x12, KEY_PROG2 },
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{ KE_WIFI, 0x30, 0 },
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{ KE_KEY, 0x31, KEY_MAIL },
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{ KE_KEY, 0x36, KEY_WWW },
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{ KE_END, 0 },
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};
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/*
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* If your machine is not here (which is currently rather likely), please send
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* a list of buttons and their key codes (reported when loading this module
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* with force=1) and the output of dmidecode to $MODULE_AUTHOR.
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*/
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static struct dmi_system_id dmi_ids[] __initdata = {
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{
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.callback = dmi_matched,
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.ident = "Fujitsu-Siemens Amilo Pro V2000",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
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DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pro V2000"),
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},
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.driver_data = keymap_fs_amilo_pro_v2000
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},
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{
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.callback = dmi_matched,
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.ident = "Fujitsu-Siemens Amilo M7400",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
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DMI_MATCH(DMI_PRODUCT_NAME, "AMILO M "),
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},
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.driver_data = keymap_fs_amilo_pro_v2000
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},
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{
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.callback = dmi_matched,
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.ident = "Fujitsu N3510",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
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DMI_MATCH(DMI_PRODUCT_NAME, "N3510"),
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},
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.driver_data = keymap_fujitsu_n3510
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},
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{
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.callback = dmi_matched,
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.ident = "Acer Aspire 1500",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1500"),
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},
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.driver_data = keymap_acer_aspire_1500
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},
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{
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.callback = dmi_matched,
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.ident = "Acer TravelMate 240",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 240"),
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},
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.driver_data = keymap_acer_travelmate_240
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},
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{
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.callback = dmi_matched,
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.ident = "Acer TravelMate 2424NWXCi",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
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DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2420"),
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},
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.driver_data = keymap_acer_travelmate_240
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},
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{
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.callback = dmi_matched,
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.ident = "AOpen 1559AS",
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.matches = {
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DMI_MATCH(DMI_PRODUCT_NAME, "E2U"),
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DMI_MATCH(DMI_BOARD_NAME, "E2U"),
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},
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.driver_data = keymap_aopen_1559as
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},
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{
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.callback = dmi_matched,
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.ident = "Medion MD 9783",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
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DMI_MATCH(DMI_PRODUCT_NAME, "MD 9783"),
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},
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.driver_data = keymap_wistron_ms2111
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},
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{ NULL, }
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};
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static int __init select_keymap(void)
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{
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if (keymap_name != NULL) {
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if (strcmp (keymap_name, "1557/MS2141") == 0)
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keymap = keymap_wistron_ms2141;
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else {
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printk(KERN_ERR "wistron_btns: Keymap unknown\n");
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return -EINVAL;
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}
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}
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dmi_check_system(dmi_ids);
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if (keymap == NULL) {
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if (!force) {
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printk(KERN_ERR "wistron_btns: System unknown\n");
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return -ENODEV;
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}
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keymap = keymap_empty;
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}
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return 0;
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}
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/* Input layer interface */
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static struct input_dev *input_dev;
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static int __devinit setup_input_dev(void)
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{
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const struct key_entry *key;
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int error;
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input_dev = input_allocate_device();
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if (!input_dev)
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return -ENOMEM;
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input_dev->name = "Wistron laptop buttons";
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input_dev->phys = "wistron/input0";
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input_dev->id.bustype = BUS_HOST;
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input_dev->cdev.dev = &wistron_device->dev;
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for (key = keymap; key->type != KE_END; key++) {
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if (key->type == KE_KEY) {
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input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);
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set_bit(key->keycode, input_dev->keybit);
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}
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}
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error = input_register_device(input_dev);
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if (error) {
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input_free_device(input_dev);
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return error;
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}
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return 0;
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}
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static void report_key(unsigned keycode)
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{
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input_report_key(input_dev, keycode, 1);
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input_sync(input_dev);
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input_report_key(input_dev, keycode, 0);
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input_sync(input_dev);
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}
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/* Driver core */
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static int wifi_enabled;
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static int bluetooth_enabled;
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static void poll_bios(unsigned long);
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static struct timer_list poll_timer = TIMER_INITIALIZER(poll_bios, 0, 0);
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static void handle_key(u8 code)
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{
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const struct key_entry *key;
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for (key = keymap; key->type != KE_END; key++) {
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if (code == key->code) {
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switch (key->type) {
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case KE_KEY:
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report_key(key->keycode);
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break;
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case KE_WIFI:
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if (have_wifi) {
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wifi_enabled = !wifi_enabled;
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bios_set_state(WIFI, wifi_enabled);
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}
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break;
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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);
|