/* * Wistron laptop button driver * Copyright (C) 2005 Miloslav Trmac * Copyright (C) 2005 Bernhard Rosenkraenzer * Copyright (C) 2005 Dmitry Torokhov * * 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 #include #include #include #include #include #include #include #include #include #include #include #include /* * 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 "); 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 size_t __init locate_wistron_bios(void __iomem *base) { static const unsigned char __initdata signature[] = { 0x42, 0x21, 0x55, 0x30 }; size_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; size_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(®s, 0, sizeof (regs)); regs.eax = 0x9610; regs.ebx = 0x061C; regs.ecx = 0x0000; call_bios(®s); return regs.eax; } static void __init bios_attach(void) { struct regs regs; memset(®s, 0, sizeof (regs)); regs.eax = 0x9610; regs.ebx = 0x012E; call_bios(®s); } static void bios_detach(void) { struct regs regs; memset(®s, 0, sizeof (regs)); regs.eax = 0x9610; regs.ebx = 0x002E; call_bios(®s); } static u8 __init bios_get_cmos_address(void) { struct regs regs; memset(®s, 0, sizeof (regs)); regs.eax = 0x9610; regs.ebx = 0x051C; call_bios(®s); return regs.ecx; } static u16 __init bios_get_default_setting(u8 subsys) { struct regs regs; memset(®s, 0, sizeof (regs)); regs.eax = 0x9610; regs.ebx = 0x0200 | subsys; call_bios(®s); return regs.eax; } static void bios_set_state(u8 subsys, int enable) { struct regs regs; memset(®s, 0, sizeof (regs)); regs.eax = 0x9610; regs.ebx = (enable ? 0x0100 : 0x0000) | subsys; call_bios(®s); } /* 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_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 } }; /* * 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 = "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 }, { 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 __init 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 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; } static struct platform_driver wistron_driver = { .suspend = wistron_suspend, .resume = wistron_resume, .driver = { .name = "wistron-bios", }, }; static int __init wb_module_init(void) { int err; err = select_keymap(); if (err) return err; err = map_bios(); if (err) return err; bios_attach(); cmos_address = bios_get_cmos_address(); err = platform_driver_register(&wistron_driver); if (err) goto err_detach_bios; wistron_device = platform_device_register_simple("wistron-bios", -1, NULL, 0); if (IS_ERR(wistron_device)) { err = PTR_ERR(wistron_device); goto err_unregister_driver; } 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); } err = setup_input_dev(); if (err) goto err_unregister_device; poll_bios(1); /* Flush stale event queue and arm timer */ return 0; err_unregister_device: platform_device_unregister(wistron_device); err_unregister_driver: platform_driver_unregister(&wistron_driver); err_detach_bios: bios_detach(); unmap_bios(); return err; } static void __exit wb_module_exit(void) { del_timer_sync(&poll_timer); input_unregister_device(input_dev); platform_device_unregister(wistron_device); platform_driver_unregister(&wistron_driver); bios_detach(); unmap_bios(); } module_init(wb_module_init); module_exit(wb_module_exit);