swh:1:snp:49cd9498d6cccc5e78252c27dcb645bcf7bf0c91
Tip revision: 4fe89d07dcc2804c8b562f6c7896a45643d34b2f authored by Linus Torvalds on 02 October 2022, 21:09:07 UTC
Linux 6.0
Linux 6.0
Tip revision: 4fe89d0
topstar-laptop.c
// SPDX-License-Identifier: GPL-2.0
/*
* Topstar Laptop ACPI Extras driver
*
* Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
* Copyright (c) 2018 Guillaume Douézan-Grard
*
* Implementation inspired by existing x86 platform drivers, in special
* asus/eepc/fujitsu-laptop, thanks to their authors.
*/
#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/dmi.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#define TOPSTAR_LAPTOP_CLASS "topstar"
struct topstar_laptop {
struct acpi_device *device;
struct platform_device *platform;
struct input_dev *input;
struct led_classdev led;
};
/*
* LED
*/
static enum led_brightness topstar_led_get(struct led_classdev *led)
{
return led->brightness;
}
static int topstar_led_set(struct led_classdev *led,
enum led_brightness state)
{
struct topstar_laptop *topstar = container_of(led,
struct topstar_laptop, led);
struct acpi_object_list params;
union acpi_object in_obj;
unsigned long long int ret;
acpi_status status;
params.count = 1;
params.pointer = &in_obj;
in_obj.type = ACPI_TYPE_INTEGER;
in_obj.integer.value = 0x83;
/*
* Topstar ACPI returns 0x30001 when the LED is ON and 0x30000 when it
* is OFF.
*/
status = acpi_evaluate_integer(topstar->device->handle,
"GETX", ¶ms, &ret);
if (ACPI_FAILURE(status))
return -1;
/*
* FNCX(0x83) toggles the LED (more precisely, it is supposed to
* act as an hardware switch and disconnect the WLAN adapter but
* it seems to be faulty on some models like the Topstar U931
* Notebook).
*/
if ((ret == 0x30001 && state == LED_OFF)
|| (ret == 0x30000 && state != LED_OFF)) {
status = acpi_execute_simple_method(topstar->device->handle,
"FNCX", 0x83);
if (ACPI_FAILURE(status))
return -1;
}
return 0;
}
static int topstar_led_init(struct topstar_laptop *topstar)
{
topstar->led = (struct led_classdev) {
.default_trigger = "rfkill0",
.brightness_get = topstar_led_get,
.brightness_set_blocking = topstar_led_set,
.name = TOPSTAR_LAPTOP_CLASS "::wlan",
};
return led_classdev_register(&topstar->platform->dev, &topstar->led);
}
static void topstar_led_exit(struct topstar_laptop *topstar)
{
led_classdev_unregister(&topstar->led);
}
/*
* Input
*/
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, 0x82, }, /* backlight event */
{ 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 topstar_input_notify(struct topstar_laptop *topstar, int event)
{
if (!sparse_keymap_report_event(topstar->input, event, 1, true))
pr_info("unknown event = 0x%02x\n", event);
}
static int topstar_input_init(struct topstar_laptop *topstar)
{
struct input_dev *input;
int err;
input = input_allocate_device();
if (!input)
return -ENOMEM;
input->name = "Topstar Laptop extra buttons";
input->phys = TOPSTAR_LAPTOP_CLASS "/input0";
input->id.bustype = BUS_HOST;
input->dev.parent = &topstar->platform->dev;
err = sparse_keymap_setup(input, topstar_keymap, NULL);
if (err) {
pr_err("Unable to setup input device keymap\n");
goto err_free_dev;
}
err = input_register_device(input);
if (err) {
pr_err("Unable to register input device\n");
goto err_free_dev;
}
topstar->input = input;
return 0;
err_free_dev:
input_free_device(input);
return err;
}
static void topstar_input_exit(struct topstar_laptop *topstar)
{
input_unregister_device(topstar->input);
}
/*
* Platform
*/
static struct platform_driver topstar_platform_driver = {
.driver = {
.name = TOPSTAR_LAPTOP_CLASS,
},
};
static int topstar_platform_init(struct topstar_laptop *topstar)
{
int err;
topstar->platform = platform_device_alloc(TOPSTAR_LAPTOP_CLASS, -1);
if (!topstar->platform)
return -ENOMEM;
platform_set_drvdata(topstar->platform, topstar);
err = platform_device_add(topstar->platform);
if (err)
goto err_device_put;
return 0;
err_device_put:
platform_device_put(topstar->platform);
return err;
}
static void topstar_platform_exit(struct topstar_laptop *topstar)
{
platform_device_unregister(topstar->platform);
}
/*
* ACPI
*/
static int topstar_acpi_fncx_switch(struct acpi_device *device, bool state)
{
acpi_status status;
u64 arg = state ? 0x86 : 0x87;
status = acpi_execute_simple_method(device->handle, "FNCX", arg);
if (ACPI_FAILURE(status)) {
pr_err("Unable to switch FNCX notifications\n");
return -ENODEV;
}
return 0;
}
static void topstar_acpi_notify(struct acpi_device *device, u32 event)
{
struct topstar_laptop *topstar = acpi_driver_data(device);
static bool dup_evnt[2];
bool *dup;
/* 0x83 and 0x84 key events comes duplicated... */
if (event == 0x83 || event == 0x84) {
dup = &dup_evnt[event - 0x83];
if (*dup) {
*dup = false;
return;
}
*dup = true;
}
topstar_input_notify(topstar, event);
}
static int topstar_acpi_init(struct topstar_laptop *topstar)
{
return topstar_acpi_fncx_switch(topstar->device, true);
}
static void topstar_acpi_exit(struct topstar_laptop *topstar)
{
topstar_acpi_fncx_switch(topstar->device, false);
}
/*
* Enable software-based WLAN LED control on systems with defective
* hardware switch.
*/
static bool led_workaround;
static int dmi_led_workaround(const struct dmi_system_id *id)
{
led_workaround = true;
return 0;
}
static const struct dmi_system_id topstar_dmi_ids[] = {
{
.callback = dmi_led_workaround,
.ident = "Topstar U931/RVP7",
.matches = {
DMI_MATCH(DMI_BOARD_NAME, "U931"),
DMI_MATCH(DMI_BOARD_VERSION, "RVP7"),
},
},
{}
};
static int topstar_acpi_add(struct acpi_device *device)
{
struct topstar_laptop *topstar;
int err;
dmi_check_system(topstar_dmi_ids);
topstar = kzalloc(sizeof(struct topstar_laptop), GFP_KERNEL);
if (!topstar)
return -ENOMEM;
strcpy(acpi_device_name(device), "Topstar TPSACPI");
strcpy(acpi_device_class(device), TOPSTAR_LAPTOP_CLASS);
device->driver_data = topstar;
topstar->device = device;
err = topstar_acpi_init(topstar);
if (err)
goto err_free;
err = topstar_platform_init(topstar);
if (err)
goto err_acpi_exit;
err = topstar_input_init(topstar);
if (err)
goto err_platform_exit;
if (led_workaround) {
err = topstar_led_init(topstar);
if (err)
goto err_input_exit;
}
return 0;
err_input_exit:
topstar_input_exit(topstar);
err_platform_exit:
topstar_platform_exit(topstar);
err_acpi_exit:
topstar_acpi_exit(topstar);
err_free:
kfree(topstar);
return err;
}
static int topstar_acpi_remove(struct acpi_device *device)
{
struct topstar_laptop *topstar = acpi_driver_data(device);
if (led_workaround)
topstar_led_exit(topstar);
topstar_input_exit(topstar);
topstar_platform_exit(topstar);
topstar_acpi_exit(topstar);
kfree(topstar);
return 0;
}
static const struct acpi_device_id topstar_device_ids[] = {
{ "TPS0001", 0 },
{ "TPSACPI01", 0 },
{ "", 0 },
};
MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
static struct acpi_driver topstar_acpi_driver = {
.name = "Topstar laptop ACPI driver",
.class = TOPSTAR_LAPTOP_CLASS,
.ids = topstar_device_ids,
.ops = {
.add = topstar_acpi_add,
.remove = topstar_acpi_remove,
.notify = topstar_acpi_notify,
},
};
static int __init topstar_laptop_init(void)
{
int ret;
ret = platform_driver_register(&topstar_platform_driver);
if (ret < 0)
return ret;
ret = acpi_bus_register_driver(&topstar_acpi_driver);
if (ret < 0)
goto err_driver_unreg;
pr_info("ACPI extras driver loaded\n");
return 0;
err_driver_unreg:
platform_driver_unregister(&topstar_platform_driver);
return ret;
}
static void __exit topstar_laptop_exit(void)
{
acpi_bus_unregister_driver(&topstar_acpi_driver);
platform_driver_unregister(&topstar_platform_driver);
}
module_init(topstar_laptop_init);
module_exit(topstar_laptop_exit);
MODULE_AUTHOR("Herton Ronaldo Krzesinski");
MODULE_AUTHOR("Guillaume Douézan-Grard");
MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
MODULE_LICENSE("GPL");