diff options
Diffstat (limited to 'drivers/platform/x86/topstar-laptop.c')
| -rw-r--r-- | drivers/platform/x86/topstar-laptop.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/drivers/platform/x86/topstar-laptop.c b/drivers/platform/x86/topstar-laptop.c new file mode 100644 index 00000000..4c20447d --- /dev/null +++ b/drivers/platform/x86/topstar-laptop.c @@ -0,0 +1,212 @@ +/* + * 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/slab.h> +#include <linux/acpi.h> +#include <linux/input.h> +#include <linux/input/sparse-keymap.h> + +#define ACPI_TOPSTAR_CLASS "topstar" + +struct topstar_hkey { + struct input_dev *inputdev; +}; + +static const struct key_entry topstar_keymap[] = { + { KE_KEY, 0x80, { KEY_BRIGHTNESSUP } }, + { KE_KEY, 0x81, { KEY_BRIGHTNESSDOWN } }, + { KE_KEY, 0x83, { KEY_VOLUMEUP } }, + { KE_KEY, 0x84, { KEY_VOLUMEDOWN } }, + { KE_KEY, 0x85, { KEY_MUTE } }, + { KE_KEY, 0x86, { KEY_SWITCHVIDEOMODE } }, + { KE_KEY, 0x87, { KEY_F13 } }, /* touchpad enable/disable key */ + { KE_KEY, 0x88, { KEY_WLAN } }, + { KE_KEY, 0x8a, { KEY_WWW } }, + { KE_KEY, 0x8b, { KEY_MAIL } }, + { KE_KEY, 0x8c, { KEY_MEDIA } }, + + /* Known non hotkey events don't handled or that we don't care yet */ + { KE_IGNORE, 0x8e, }, + { KE_IGNORE, 0x8f, }, + { KE_IGNORE, 0x90, }, + + /* + * 'G key' generate two event codes, convert to only + * one event/key code for now, consider replacing by + * a switch (3G switch - SW_3G?) + */ + { KE_KEY, 0x96, { KEY_F14 } }, + { KE_KEY, 0x97, { KEY_F14 } }, + + { KE_END, 0 } +}; + +static void acpi_topstar_notify(struct acpi_device *device, u32 event) +{ + 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; + } + + if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true)) + 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 acpi_topstar_init_hkey(struct topstar_hkey *hkey) +{ + struct input_dev *input; + int error; + + input = input_allocate_device(); + if (!input) { + pr_err("Unable to allocate input device\n"); + return -ENOMEM; + } + + input->name = "Topstar Laptop extra buttons"; + input->phys = "topstar/input0"; + input->id.bustype = BUS_HOST; + + error = sparse_keymap_setup(input, topstar_keymap, NULL); + if (error) { + pr_err("Unable to setup input device keymap\n"); + goto err_free_dev; + } + + error = input_register_device(input); + if (error) { + pr_err("Unable to register input device\n"); + goto err_free_keymap; + } + + hkey->inputdev = input; + return 0; + + err_free_keymap: + sparse_keymap_free(input); + err_free_dev: + input_free_device(input); + return error; +} + +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); + + sparse_keymap_free(tps_hkey->inputdev); + 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; + + pr_info("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"); |