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![Guillaume Douézan-Grard](/assets/img/avatar_default.png)
Replace verbatim GPLv2 license copy with SPDX identifier. Signed-off-by: Guillaume Douézan-Grard <gdouezangrard@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
400 lines
8.7 KiB
C
400 lines
8.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Topstar Laptop ACPI Extras driver
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*
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* Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
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* Copyright (c) 2018 Guillaume Douézan-Grard
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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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#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/dmi.h>
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#include <linux/input.h>
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#include <linux/input/sparse-keymap.h>
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#include <linux/leds.h>
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#include <linux/platform_device.h>
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#define TOPSTAR_LAPTOP_CLASS "topstar"
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struct topstar_laptop {
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struct acpi_device *device;
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struct platform_device *platform;
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struct input_dev *input;
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struct led_classdev led;
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};
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/*
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* LED
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*/
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static enum led_brightness topstar_led_get(struct led_classdev *led)
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{
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return led->brightness;
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}
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static int topstar_led_set(struct led_classdev *led,
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enum led_brightness state)
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{
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struct topstar_laptop *topstar = container_of(led,
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struct topstar_laptop, led);
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struct acpi_object_list params;
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union acpi_object in_obj;
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unsigned long long int ret;
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acpi_status status;
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params.count = 1;
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params.pointer = &in_obj;
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in_obj.type = ACPI_TYPE_INTEGER;
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in_obj.integer.value = 0x83;
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/*
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* Topstar ACPI returns 0x30001 when the LED is ON and 0x30000 when it
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* is OFF.
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*/
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status = acpi_evaluate_integer(topstar->device->handle,
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"GETX", ¶ms, &ret);
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if (ACPI_FAILURE(status))
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return -1;
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/*
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* FNCX(0x83) toggles the LED (more precisely, it is supposed to
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* act as an hardware switch and disconnect the WLAN adapter but
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* it seems to be faulty on some models like the Topstar U931
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* Notebook).
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*/
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if ((ret == 0x30001 && state == LED_OFF)
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|| (ret == 0x30000 && state != LED_OFF)) {
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status = acpi_execute_simple_method(topstar->device->handle,
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"FNCX", 0x83);
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if (ACPI_FAILURE(status))
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return -1;
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}
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return 0;
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}
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static int topstar_led_init(struct topstar_laptop *topstar)
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{
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topstar->led = (struct led_classdev) {
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.default_trigger = "rfkill0",
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.brightness_get = topstar_led_get,
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.brightness_set_blocking = topstar_led_set,
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.name = TOPSTAR_LAPTOP_CLASS "::wlan",
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};
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return led_classdev_register(&topstar->platform->dev, &topstar->led);
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}
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static void topstar_led_exit(struct topstar_laptop *topstar)
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{
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led_classdev_unregister(&topstar->led);
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}
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/*
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* Input
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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 topstar_input_notify(struct topstar_laptop *topstar, int event)
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{
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if (!sparse_keymap_report_event(topstar->input, 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 topstar_input_init(struct topstar_laptop *topstar)
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{
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struct input_dev *input;
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int err;
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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_LAPTOP_CLASS "/input0";
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input->id.bustype = BUS_HOST;
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input->dev.parent = &topstar->platform->dev;
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err = sparse_keymap_setup(input, topstar_keymap, NULL);
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if (err) {
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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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err = input_register_device(input);
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if (err) {
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pr_err("Unable to register input device\n");
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goto err_free_dev;
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}
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topstar->input = input;
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return 0;
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err_free_dev:
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input_free_device(input);
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return err;
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}
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static void topstar_input_exit(struct topstar_laptop *topstar)
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{
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input_unregister_device(topstar->input);
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}
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/*
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* Platform
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*/
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static struct platform_driver topstar_platform_driver = {
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.driver = {
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.name = TOPSTAR_LAPTOP_CLASS,
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},
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};
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static int topstar_platform_init(struct topstar_laptop *topstar)
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{
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int err;
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topstar->platform = platform_device_alloc(TOPSTAR_LAPTOP_CLASS, -1);
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if (!topstar->platform)
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return -ENOMEM;
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platform_set_drvdata(topstar->platform, topstar);
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err = platform_device_add(topstar->platform);
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if (err)
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goto err_device_put;
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return 0;
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err_device_put:
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platform_device_put(topstar->platform);
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return err;
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}
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static void topstar_platform_exit(struct topstar_laptop *topstar)
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{
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platform_device_unregister(topstar->platform);
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}
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/*
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* ACPI
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*/
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static int topstar_acpi_fncx_switch(struct acpi_device *device, bool state)
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{
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acpi_status status;
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u64 arg = state ? 0x86 : 0x87;
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status = acpi_execute_simple_method(device->handle, "FNCX", arg);
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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 void topstar_acpi_notify(struct acpi_device *device, u32 event)
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{
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struct topstar_laptop *topstar = acpi_driver_data(device);
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static bool dup_evnt[2];
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bool *dup;
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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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topstar_input_notify(topstar, event);
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}
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static int topstar_acpi_init(struct topstar_laptop *topstar)
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{
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return topstar_acpi_fncx_switch(topstar->device, true);
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}
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static void topstar_acpi_exit(struct topstar_laptop *topstar)
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{
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topstar_acpi_fncx_switch(topstar->device, false);
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}
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/*
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* Enable software-based WLAN LED control on systems with defective
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* hardware switch.
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*/
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static bool led_workaround;
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static int dmi_led_workaround(const struct dmi_system_id *id)
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{
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led_workaround = true;
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return 0;
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}
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static const struct dmi_system_id topstar_dmi_ids[] = {
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{
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.callback = dmi_led_workaround,
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.ident = "Topstar U931/RVP7",
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.matches = {
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DMI_MATCH(DMI_BOARD_NAME, "U931"),
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DMI_MATCH(DMI_BOARD_VERSION, "RVP7"),
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},
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},
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{}
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};
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static int topstar_acpi_add(struct acpi_device *device)
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{
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struct topstar_laptop *topstar;
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int err;
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dmi_check_system(topstar_dmi_ids);
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topstar = kzalloc(sizeof(struct topstar_laptop), GFP_KERNEL);
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if (!topstar)
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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), TOPSTAR_LAPTOP_CLASS);
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device->driver_data = topstar;
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topstar->device = device;
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err = topstar_acpi_init(topstar);
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if (err)
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goto err_free;
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err = topstar_platform_init(topstar);
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if (err)
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goto err_acpi_exit;
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err = topstar_input_init(topstar);
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if (err)
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goto err_platform_exit;
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if (led_workaround) {
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err = topstar_led_init(topstar);
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if (err)
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goto err_input_exit;
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}
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return 0;
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err_input_exit:
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topstar_input_exit(topstar);
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err_platform_exit:
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topstar_platform_exit(topstar);
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err_acpi_exit:
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topstar_acpi_exit(topstar);
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err_free:
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kfree(topstar);
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return err;
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}
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static int topstar_acpi_remove(struct acpi_device *device)
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{
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struct topstar_laptop *topstar = acpi_driver_data(device);
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if (led_workaround)
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topstar_led_exit(topstar);
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topstar_input_exit(topstar);
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topstar_platform_exit(topstar);
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topstar_acpi_exit(topstar);
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kfree(topstar);
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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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{ "TPS0001", 0 },
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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 topstar_acpi_driver = {
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.name = "Topstar laptop ACPI driver",
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.class = TOPSTAR_LAPTOP_CLASS,
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.ids = topstar_device_ids,
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.ops = {
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.add = topstar_acpi_add,
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.remove = topstar_acpi_remove,
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.notify = topstar_acpi_notify,
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},
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};
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static int __init topstar_laptop_init(void)
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{
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int ret;
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ret = platform_driver_register(&topstar_platform_driver);
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if (ret < 0)
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return ret;
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ret = acpi_bus_register_driver(&topstar_acpi_driver);
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if (ret < 0)
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goto err_driver_unreg;
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pr_info("ACPI extras driver loaded\n");
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return 0;
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err_driver_unreg:
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platform_driver_unregister(&topstar_platform_driver);
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return ret;
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}
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static void __exit topstar_laptop_exit(void)
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{
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acpi_bus_unregister_driver(&topstar_acpi_driver);
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platform_driver_unregister(&topstar_platform_driver);
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}
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module_init(topstar_laptop_init);
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module_exit(topstar_laptop_exit);
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MODULE_AUTHOR("Herton Ronaldo Krzesinski");
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MODULE_AUTHOR("Guillaume Douézan-Grard");
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MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
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MODULE_LICENSE("GPL");
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