3 files changed, 160 insertions, 0 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 55ca39dea42e..8dd2b3a4c475 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 d1c16210a512..394258bd77c0 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 000000000000..a350418e87ea
--- /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);