diff options
| -rw-r--r-- | drivers/platform/x86/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/platform/x86/Makefile | 1 | ||||
| -rw-r--r-- | drivers/platform/x86/toshiba_bluetooth.c | 144 |
3 files changed, 160 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 55ca39dea42..8dd2b3a4c47 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -435,4 +435,19 @@ config ACPI_TOSHIBA If you have a legacy free Toshiba laptop (such as the Libretto L1 series), say Y. + +config TOSHIBA_BT_RFKILL + tristate "Toshiba Bluetooth RFKill switch support" + depends on ACPI + ---help--- + This driver adds support for Bluetooth events for the RFKill + switch on modern Toshiba laptops with full ACPI support and + an RFKill switch. + + This driver handles RFKill events for the TOS6205 Bluetooth, + and re-enables it when the switch is set back to the 'on' + position. + + If you have a modern Toshiba laptop with a Bluetooth and an + RFKill switch (such as the Portege R500), say Y. endif # X86_PLATFORM_DEVICES diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index d1c16210a51..394258bd77c 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -21,3 +21,4 @@ obj-$(CONFIG_ACPI_WMI) += wmi.o obj-$(CONFIG_ACPI_ASUS) += asus_acpi.o obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o +obj-$(CONFIG_TOSHIBA_BT_RFKILL) += toshiba_bluetooth.o diff --git a/drivers/platform/x86/toshiba_bluetooth.c b/drivers/platform/x86/toshiba_bluetooth.c new file mode 100644 index 00000000000..a350418e87e --- /dev/null +++ b/drivers/platform/x86/toshiba_bluetooth.c @@ -0,0 +1,144 @@ +/* + * 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. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/types.h> +#include <acpi/acpi_bus.h> +#include <acpi/acpi_drivers.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, int type); +static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event); +static int toshiba_bt_resume(struct acpi_device *device); + +static const struct acpi_device_id bt_device_ids[] = { + { "TOS6205", 0}, + { "", 0}, +}; +MODULE_DEVICE_TABLE(acpi, bt_device_ids); + +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, + .resume = toshiba_bt_resume, + }, + .owner = THIS_MODULE, +}; + + +static int toshiba_bluetooth_enable(acpi_handle handle) +{ + acpi_status res1, res2; + acpi_integer 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; + + printk(KERN_INFO "toshiba_bluetooth: 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; + + printk(KERN_WARNING "toshiba_bluetooth: 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); +} + +static int toshiba_bt_resume(struct acpi_device *device) +{ + return toshiba_bluetooth_enable(device->handle); +} + +static int toshiba_bt_rfkill_add(struct acpi_device *device) +{ + acpi_status status; + acpi_integer 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) { + printk(KERN_INFO "Detected Toshiba ACPI Bluetooth device - " + "installing RFKill handler\n"); + result = toshiba_bluetooth_enable(device->handle); + } + + return result; +} + +static int __init toshiba_bt_rfkill_init(void) +{ + int result; + + result = acpi_bus_register_driver(&toshiba_bt_rfkill_driver); + if (result < 0) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Error registering driver\n")); + return result; + } + + return 0; +} + +static int toshiba_bt_rfkill_remove(struct acpi_device *device, int type) +{ + /* clean up */ + return 0; +} + +static void __exit toshiba_bt_rfkill_exit(void) +{ + acpi_bus_unregister_driver(&toshiba_bt_rfkill_driver); +} + +module_init(toshiba_bt_rfkill_init); +module_exit(toshiba_bt_rfkill_exit); |