diff options
Diffstat (limited to 'drivers/platform/x86/topstar-laptop.c')
| -rw-r--r-- | drivers/platform/x86/topstar-laptop.c | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/drivers/platform/x86/topstar-laptop.c b/drivers/platform/x86/topstar-laptop.c new file mode 100644 index 0000000..02f3d4e --- /dev/null +++ b/drivers/platform/x86/topstar-laptop.c @@ -0,0 +1,265 @@ +/* + * ACPI driver for Topstar notebooks (hotkeys support only) + * + * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br> + * + * Implementation inspired by existing x86 platform drivers, in special + * asus/eepc/fujitsu-laptop, thanks to their authors + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/acpi.h> +#include <linux/input.h> + +#define ACPI_TOPSTAR_CLASS "topstar" + +struct topstar_hkey { + struct input_dev *inputdev; +}; + +struct tps_key_entry { + u8 code; + u16 keycode; +}; + +static struct tps_key_entry topstar_keymap[] = { + { 0x80, KEY_BRIGHTNESSUP }, + { 0x81, KEY_BRIGHTNESSDOWN }, + { 0x83, KEY_VOLUMEUP }, + { 0x84, KEY_VOLUMEDOWN }, + { 0x85, KEY_MUTE }, + { 0x86, KEY_SWITCHVIDEOMODE }, + { 0x87, KEY_F13 }, /* touchpad enable/disable key */ + { 0x88, KEY_WLAN }, + { 0x8a, KEY_WWW }, + { 0x8b, KEY_MAIL }, + { 0x8c, KEY_MEDIA }, + { 0x96, KEY_F14 }, /* G key? */ + { } +}; + +static struct tps_key_entry *tps_get_key_by_scancode(int code) +{ + struct tps_key_entry *key; + + for (key = topstar_keymap; key->code; key++) + if (code == key->code) + return key; + + return NULL; +} + +static struct tps_key_entry *tps_get_key_by_keycode(int code) +{ + struct tps_key_entry *key; + + for (key = topstar_keymap; key->code; key++) + if (code == key->keycode) + return key; + + return NULL; +} + +static void acpi_topstar_notify(struct acpi_device *device, u32 event) +{ + struct tps_key_entry *key; + static bool dup_evnt[2]; + bool *dup; + struct topstar_hkey *hkey = acpi_driver_data(device); + + /* 0x83 and 0x84 key events comes duplicated... */ + if (event == 0x83 || event == 0x84) { + dup = &dup_evnt[event - 0x83]; + if (*dup) { + *dup = false; + return; + } + *dup = true; + } + + /* + * 'G key' generate two event codes, convert to only + * one event/key code for now (3G switch?) + */ + if (event == 0x97) + event = 0x96; + + key = tps_get_key_by_scancode(event); + if (key) { + input_report_key(hkey->inputdev, key->keycode, 1); + input_sync(hkey->inputdev); + input_report_key(hkey->inputdev, key->keycode, 0); + input_sync(hkey->inputdev); + return; + } + + /* Known non hotkey events don't handled or that we don't care yet */ + if (event == 0x8e || event == 0x8f || event == 0x90) + return; + + pr_info("unknown event = 0x%02x\n", event); +} + +static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state) +{ + acpi_status status; + union acpi_object fncx_params[1] = { + { .type = ACPI_TYPE_INTEGER } + }; + struct acpi_object_list fncx_arg_list = { 1, &fncx_params[0] }; + + fncx_params[0].integer.value = state ? 0x86 : 0x87; + status = acpi_evaluate_object(device->handle, "FNCX", &fncx_arg_list, NULL); + if (ACPI_FAILURE(status)) { + pr_err("Unable to switch FNCX notifications\n"); + return -ENODEV; + } + + return 0; +} + +static int topstar_getkeycode(struct input_dev *dev, int scancode, int *keycode) +{ + struct tps_key_entry *key = tps_get_key_by_scancode(scancode); + + if (!key) + return -EINVAL; + + *keycode = key->keycode; + return 0; +} + +static int topstar_setkeycode(struct input_dev *dev, int scancode, int keycode) +{ + struct tps_key_entry *key; + int old_keycode; + + if (keycode < 0 || keycode > KEY_MAX) + return -EINVAL; + + key = tps_get_key_by_scancode(scancode); + + if (!key) + return -EINVAL; + + old_keycode = key->keycode; + key->keycode = keycode; + set_bit(keycode, dev->keybit); + if (!tps_get_key_by_keycode(old_keycode)) + clear_bit(old_keycode, dev->keybit); + return 0; +} + +static int acpi_topstar_init_hkey(struct topstar_hkey *hkey) +{ + struct tps_key_entry *key; + + hkey->inputdev = input_allocate_device(); + if (!hkey->inputdev) { + pr_err("Unable to allocate input device\n"); + return -ENODEV; + } + hkey->inputdev->name = "Topstar Laptop extra buttons"; + hkey->inputdev->phys = "topstar/input0"; + hkey->inputdev->id.bustype = BUS_HOST; + hkey->inputdev->getkeycode = topstar_getkeycode; + hkey->inputdev->setkeycode = topstar_setkeycode; + for (key = topstar_keymap; key->code; key++) { + set_bit(EV_KEY, hkey->inputdev->evbit); + set_bit(key->keycode, hkey->inputdev->keybit); + } + if (input_register_device(hkey->inputdev)) { + pr_err("Unable to register input device\n"); + input_free_device(hkey->inputdev); + return -ENODEV; + } + + return 0; +} + +static int acpi_topstar_add(struct acpi_device *device) +{ + struct topstar_hkey *tps_hkey; + + tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL); + if (!tps_hkey) + return -ENOMEM; + + strcpy(acpi_device_name(device), "Topstar TPSACPI"); + strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS); + + if (acpi_topstar_fncx_switch(device, true)) + goto add_err; + + if (acpi_topstar_init_hkey(tps_hkey)) + goto add_err; + + device->driver_data = tps_hkey; + return 0; + +add_err: + kfree(tps_hkey); + return -ENODEV; +} + +static int acpi_topstar_remove(struct acpi_device *device, int type) +{ + struct topstar_hkey *tps_hkey = acpi_driver_data(device); + + acpi_topstar_fncx_switch(device, false); + + input_unregister_device(tps_hkey->inputdev); + kfree(tps_hkey); + + return 0; +} + +static const struct acpi_device_id topstar_device_ids[] = { + { "TPSACPI01", 0 }, + { "", 0 }, +}; +MODULE_DEVICE_TABLE(acpi, topstar_device_ids); + +static struct acpi_driver acpi_topstar_driver = { + .name = "Topstar laptop ACPI driver", + .class = ACPI_TOPSTAR_CLASS, + .ids = topstar_device_ids, + .ops = { + .add = acpi_topstar_add, + .remove = acpi_topstar_remove, + .notify = acpi_topstar_notify, + }, +}; + +static int __init topstar_laptop_init(void) +{ + int ret; + + ret = acpi_bus_register_driver(&acpi_topstar_driver); + if (ret < 0) + return ret; + + printk(KERN_INFO "Topstar Laptop ACPI extras driver loaded\n"); + + return 0; +} + +static void __exit topstar_laptop_exit(void) +{ + acpi_bus_unregister_driver(&acpi_topstar_driver); +} + +module_init(topstar_laptop_init); +module_exit(topstar_laptop_exit); + +MODULE_AUTHOR("Herton Ronaldo Krzesinski"); +MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver"); +MODULE_LICENSE("GPL"); |