130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/*
|
|
* Toshiba Bluetooth Enable Driver
|
|
*
|
|
* Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com>
|
|
*
|
|
* Thanks to Matthew Garrett for background info on ACPI innards which
|
|
* normal people aren't meant to understand :-)
|
|
*
|
|
* 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.
|
|
*
|
|
* Note the Toshiba Bluetooth RFKill switch seems to be a strange
|
|
* fish. It only provides a BT event when the switch is flipped to
|
|
* the 'on' position. When flipping it to 'off', the USB device is
|
|
* simply pulled away underneath us, without any BT event being
|
|
* delivered.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/acpi.h>
|
|
|
|
MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>");
|
|
MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int toshiba_bt_rfkill_add(struct acpi_device *device);
|
|
static int toshiba_bt_rfkill_remove(struct acpi_device *device);
|
|
static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event);
|
|
|
|
static const struct acpi_device_id bt_device_ids[] = {
|
|
{ "TOS6205", 0},
|
|
{ "", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, bt_device_ids);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int toshiba_bt_resume(struct device *dev);
|
|
#endif
|
|
static SIMPLE_DEV_PM_OPS(toshiba_bt_pm, NULL, toshiba_bt_resume);
|
|
|
|
static struct acpi_driver toshiba_bt_rfkill_driver = {
|
|
.name = "Toshiba BT",
|
|
.class = "Toshiba",
|
|
.ids = bt_device_ids,
|
|
.ops = {
|
|
.add = toshiba_bt_rfkill_add,
|
|
.remove = toshiba_bt_rfkill_remove,
|
|
.notify = toshiba_bt_rfkill_notify,
|
|
},
|
|
.owner = THIS_MODULE,
|
|
.drv.pm = &toshiba_bt_pm,
|
|
};
|
|
|
|
|
|
static int toshiba_bluetooth_enable(acpi_handle handle)
|
|
{
|
|
acpi_status res1, res2;
|
|
u64 result;
|
|
|
|
/*
|
|
* Query ACPI to verify RFKill switch is set to 'on'.
|
|
* If not, we return silently, no need to report it as
|
|
* an error.
|
|
*/
|
|
res1 = acpi_evaluate_integer(handle, "BTST", NULL, &result);
|
|
if (ACPI_FAILURE(res1))
|
|
return res1;
|
|
if (!(result & 0x01))
|
|
return 0;
|
|
|
|
pr_info("Re-enabling Toshiba Bluetooth\n");
|
|
res1 = acpi_evaluate_object(handle, "AUSB", NULL, NULL);
|
|
res2 = acpi_evaluate_object(handle, "BTPO", NULL, NULL);
|
|
if (!ACPI_FAILURE(res1) || !ACPI_FAILURE(res2))
|
|
return 0;
|
|
|
|
pr_warn("Failed to re-enable Toshiba Bluetooth\n");
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
toshiba_bluetooth_enable(device->handle);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int toshiba_bt_resume(struct device *dev)
|
|
{
|
|
return toshiba_bluetooth_enable(to_acpi_device(dev)->handle);
|
|
}
|
|
#endif
|
|
|
|
static int toshiba_bt_rfkill_add(struct acpi_device *device)
|
|
{
|
|
acpi_status status;
|
|
u64 bt_present;
|
|
int result = -ENODEV;
|
|
|
|
/*
|
|
* Some Toshiba laptops may have a fake TOS6205 device in
|
|
* their ACPI BIOS, so query the _STA method to see if there
|
|
* is really anything there, before trying to enable it.
|
|
*/
|
|
status = acpi_evaluate_integer(device->handle, "_STA", NULL,
|
|
&bt_present);
|
|
|
|
if (!ACPI_FAILURE(status) && bt_present) {
|
|
pr_info("Detected Toshiba ACPI Bluetooth device - "
|
|
"installing RFKill handler\n");
|
|
result = toshiba_bluetooth_enable(device->handle);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int toshiba_bt_rfkill_remove(struct acpi_device *device)
|
|
{
|
|
/* clean up */
|
|
return 0;
|
|
}
|
|
|
|
module_acpi_driver(toshiba_bt_rfkill_driver);
|