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![Joe Perches](/assets/img/avatar_default.png)
Emitting an OOM message isn't necessary after input_allocate_device as there's a generic OOM and a dump_stack already done. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
187 lines
4.4 KiB
C
187 lines
4.4 KiB
C
/*
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* ACPI driver for Topstar notebooks (hotkeys support only)
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*
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* Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
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*
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* Implementation inspired by existing x86 platform drivers, in special
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* asus/eepc/fujitsu-laptop, thanks to their authors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#define ACPI_TOPSTAR_CLASS "topstar"
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struct topstar_hkey {
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struct input_dev *inputdev;
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};
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static const struct key_entry topstar_keymap[] = {
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{ KE_KEY, 0x80, { KEY_BRIGHTNESSUP } },
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{ KE_KEY, 0x81, { KEY_BRIGHTNESSDOWN } },
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{ KE_KEY, 0x83, { KEY_VOLUMEUP } },
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{ KE_KEY, 0x84, { KEY_VOLUMEDOWN } },
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{ KE_KEY, 0x85, { KEY_MUTE } },
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{ KE_KEY, 0x86, { KEY_SWITCHVIDEOMODE } },
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{ KE_KEY, 0x87, { KEY_F13 } }, /* touchpad enable/disable key */
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{ KE_KEY, 0x88, { KEY_WLAN } },
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{ KE_KEY, 0x8a, { KEY_WWW } },
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{ KE_KEY, 0x8b, { KEY_MAIL } },
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{ KE_KEY, 0x8c, { KEY_MEDIA } },
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/* Known non hotkey events don't handled or that we don't care yet */
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{ KE_IGNORE, 0x82, }, /* backlight event */
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{ KE_IGNORE, 0x8e, },
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{ KE_IGNORE, 0x8f, },
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{ KE_IGNORE, 0x90, },
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/*
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* 'G key' generate two event codes, convert to only
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* one event/key code for now, consider replacing by
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* a switch (3G switch - SW_3G?)
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*/
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{ KE_KEY, 0x96, { KEY_F14 } },
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{ KE_KEY, 0x97, { KEY_F14 } },
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{ KE_END, 0 }
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};
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static void acpi_topstar_notify(struct acpi_device *device, u32 event)
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{
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static bool dup_evnt[2];
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bool *dup;
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struct topstar_hkey *hkey = acpi_driver_data(device);
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/* 0x83 and 0x84 key events comes duplicated... */
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if (event == 0x83 || event == 0x84) {
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dup = &dup_evnt[event - 0x83];
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if (*dup) {
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*dup = false;
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return;
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}
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*dup = true;
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}
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if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true))
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pr_info("unknown event = 0x%02x\n", event);
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}
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static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
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{
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acpi_status status;
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status = acpi_execute_simple_method(device->handle, "FNCX",
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state ? 0x86 : 0x87);
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if (ACPI_FAILURE(status)) {
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pr_err("Unable to switch FNCX notifications\n");
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return -ENODEV;
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}
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return 0;
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}
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static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
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{
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struct input_dev *input;
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int error;
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input = input_allocate_device();
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if (!input)
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return -ENOMEM;
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input->name = "Topstar Laptop extra buttons";
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input->phys = "topstar/input0";
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input->id.bustype = BUS_HOST;
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error = sparse_keymap_setup(input, topstar_keymap, NULL);
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if (error) {
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pr_err("Unable to setup input device keymap\n");
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goto err_free_dev;
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}
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error = input_register_device(input);
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if (error) {
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pr_err("Unable to register input device\n");
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goto err_free_keymap;
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}
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hkey->inputdev = input;
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return 0;
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err_free_keymap:
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sparse_keymap_free(input);
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err_free_dev:
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input_free_device(input);
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return error;
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}
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static int acpi_topstar_add(struct acpi_device *device)
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{
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struct topstar_hkey *tps_hkey;
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tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
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if (!tps_hkey)
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return -ENOMEM;
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strcpy(acpi_device_name(device), "Topstar TPSACPI");
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strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);
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if (acpi_topstar_fncx_switch(device, true))
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goto add_err;
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if (acpi_topstar_init_hkey(tps_hkey))
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goto add_err;
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device->driver_data = tps_hkey;
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return 0;
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add_err:
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kfree(tps_hkey);
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return -ENODEV;
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}
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static int acpi_topstar_remove(struct acpi_device *device)
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{
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struct topstar_hkey *tps_hkey = acpi_driver_data(device);
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acpi_topstar_fncx_switch(device, false);
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sparse_keymap_free(tps_hkey->inputdev);
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input_unregister_device(tps_hkey->inputdev);
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kfree(tps_hkey);
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return 0;
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}
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static const struct acpi_device_id topstar_device_ids[] = {
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{ "TPSACPI01", 0 },
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{ "", 0 },
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};
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MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
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static struct acpi_driver acpi_topstar_driver = {
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.name = "Topstar laptop ACPI driver",
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.class = ACPI_TOPSTAR_CLASS,
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.ids = topstar_device_ids,
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.ops = {
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.add = acpi_topstar_add,
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.remove = acpi_topstar_remove,
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.notify = acpi_topstar_notify,
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},
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};
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module_acpi_driver(acpi_topstar_driver);
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MODULE_AUTHOR("Herton Ronaldo Krzesinski");
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MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
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MODULE_LICENSE("GPL");
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