142b4e9eeSJes Sorensen /* 242b4e9eeSJes Sorensen * Toshiba Bluetooth Enable Driver 342b4e9eeSJes Sorensen * 442b4e9eeSJes Sorensen * Copyright (C) 2009 Jes Sorensen <Jes.Sorensen@gmail.com> 542b4e9eeSJes Sorensen * 642b4e9eeSJes Sorensen * Thanks to Matthew Garrett for background info on ACPI innards which 742b4e9eeSJes Sorensen * normal people aren't meant to understand :-) 842b4e9eeSJes Sorensen * 942b4e9eeSJes Sorensen * This program is free software; you can redistribute it and/or modify 1042b4e9eeSJes Sorensen * it under the terms of the GNU General Public License version 2 as 1142b4e9eeSJes Sorensen * published by the Free Software Foundation. 1242b4e9eeSJes Sorensen * 1342b4e9eeSJes Sorensen * Note the Toshiba Bluetooth RFKill switch seems to be a strange 1442b4e9eeSJes Sorensen * fish. It only provides a BT event when the switch is flipped to 1542b4e9eeSJes Sorensen * the 'on' position. When flipping it to 'off', the USB device is 1642b4e9eeSJes Sorensen * simply pulled away underneath us, without any BT event being 1742b4e9eeSJes Sorensen * delivered. 1842b4e9eeSJes Sorensen */ 1942b4e9eeSJes Sorensen 207e33460dSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 217e33460dSJoe Perches 2242b4e9eeSJes Sorensen #include <linux/kernel.h> 2342b4e9eeSJes Sorensen #include <linux/module.h> 2442b4e9eeSJes Sorensen #include <linux/init.h> 2542b4e9eeSJes Sorensen #include <linux/types.h> 268b48463fSLv Zheng #include <linux/acpi.h> 2742b4e9eeSJes Sorensen 2842b4e9eeSJes Sorensen MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@gmail.com>"); 2942b4e9eeSJes Sorensen MODULE_DESCRIPTION("Toshiba Laptop ACPI Bluetooth Enable Driver"); 3042b4e9eeSJes Sorensen MODULE_LICENSE("GPL"); 3142b4e9eeSJes Sorensen 3242b4e9eeSJes Sorensen static int toshiba_bt_rfkill_add(struct acpi_device *device); 3351fac838SRafael J. Wysocki static int toshiba_bt_rfkill_remove(struct acpi_device *device); 3442b4e9eeSJes Sorensen static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event); 3542b4e9eeSJes Sorensen 3642b4e9eeSJes Sorensen static const struct acpi_device_id bt_device_ids[] = { 3742b4e9eeSJes Sorensen { "TOS6205", 0}, 3842b4e9eeSJes Sorensen { "", 0}, 3942b4e9eeSJes Sorensen }; 4042b4e9eeSJes Sorensen MODULE_DEVICE_TABLE(acpi, bt_device_ids); 4142b4e9eeSJes Sorensen 423567a4e2SRafael J. Wysocki #ifdef CONFIG_PM_SLEEP 43d69239aeSRafael J. Wysocki static int toshiba_bt_resume(struct device *dev); 443567a4e2SRafael J. Wysocki #endif 45d69239aeSRafael J. Wysocki static SIMPLE_DEV_PM_OPS(toshiba_bt_pm, NULL, toshiba_bt_resume); 46d69239aeSRafael J. Wysocki 4742b4e9eeSJes Sorensen static struct acpi_driver toshiba_bt_rfkill_driver = { 4842b4e9eeSJes Sorensen .name = "Toshiba BT", 4942b4e9eeSJes Sorensen .class = "Toshiba", 5042b4e9eeSJes Sorensen .ids = bt_device_ids, 5142b4e9eeSJes Sorensen .ops = { 5242b4e9eeSJes Sorensen .add = toshiba_bt_rfkill_add, 5342b4e9eeSJes Sorensen .remove = toshiba_bt_rfkill_remove, 5442b4e9eeSJes Sorensen .notify = toshiba_bt_rfkill_notify, 5542b4e9eeSJes Sorensen }, 5642b4e9eeSJes Sorensen .owner = THIS_MODULE, 57d69239aeSRafael J. Wysocki .drv.pm = &toshiba_bt_pm, 5842b4e9eeSJes Sorensen }; 5942b4e9eeSJes Sorensen 60bb2ea96bSAzael Avalos static int toshiba_bluetooth_present(acpi_handle handle) 61bb2ea96bSAzael Avalos { 62bb2ea96bSAzael Avalos acpi_status result; 63bb2ea96bSAzael Avalos u64 bt_present; 64bb2ea96bSAzael Avalos 6518b8696bSAzael Avalos /* 6618b8696bSAzael Avalos * Some Toshiba laptops may have a fake TOS6205 device in 6718b8696bSAzael Avalos * their ACPI BIOS, so query the _STA method to see if there 6818b8696bSAzael Avalos * is really anything there. 6918b8696bSAzael Avalos */ 70bb2ea96bSAzael Avalos result = acpi_evaluate_integer(handle, "_STA", NULL, &bt_present); 71bb2ea96bSAzael Avalos if (ACPI_FAILURE(result)) { 72bb2ea96bSAzael Avalos pr_err("ACPI call to query Bluetooth presence failed"); 73bb2ea96bSAzael Avalos return -ENXIO; 74bb2ea96bSAzael Avalos } else if (!bt_present) { 75bb2ea96bSAzael Avalos pr_info("Bluetooth device not present\n"); 76bb2ea96bSAzael Avalos return -ENODEV; 77bb2ea96bSAzael Avalos } 78bb2ea96bSAzael Avalos 79bb2ea96bSAzael Avalos return 0; 80bb2ea96bSAzael Avalos } 81bb2ea96bSAzael Avalos 82bb2ea96bSAzael Avalos static int toshiba_bluetooth_status(acpi_handle handle) 83bb2ea96bSAzael Avalos { 84bb2ea96bSAzael Avalos acpi_status result; 85bb2ea96bSAzael Avalos u64 status; 86bb2ea96bSAzael Avalos 87bb2ea96bSAzael Avalos result = acpi_evaluate_integer(handle, "BTST", NULL, &status); 88bb2ea96bSAzael Avalos if (ACPI_FAILURE(result)) { 89bb2ea96bSAzael Avalos pr_err("Could not get Bluetooth device status\n"); 90bb2ea96bSAzael Avalos return -ENXIO; 91bb2ea96bSAzael Avalos } 92bb2ea96bSAzael Avalos 93bb2ea96bSAzael Avalos pr_info("Bluetooth status %llu\n", status); 94bb2ea96bSAzael Avalos 95bb2ea96bSAzael Avalos return status; 96bb2ea96bSAzael Avalos } 9742b4e9eeSJes Sorensen 9842b4e9eeSJes Sorensen static int toshiba_bluetooth_enable(acpi_handle handle) 9942b4e9eeSJes Sorensen { 10042b4e9eeSJes Sorensen acpi_status res1, res2; 101439913ffSLin Ming u64 result; 10242b4e9eeSJes Sorensen 10342b4e9eeSJes Sorensen /* 10442b4e9eeSJes Sorensen * Query ACPI to verify RFKill switch is set to 'on'. 10542b4e9eeSJes Sorensen * If not, we return silently, no need to report it as 10642b4e9eeSJes Sorensen * an error. 10742b4e9eeSJes Sorensen */ 10842b4e9eeSJes Sorensen res1 = acpi_evaluate_integer(handle, "BTST", NULL, &result); 10942b4e9eeSJes Sorensen if (ACPI_FAILURE(res1)) 11042b4e9eeSJes Sorensen return res1; 11142b4e9eeSJes Sorensen if (!(result & 0x01)) 11242b4e9eeSJes Sorensen return 0; 11342b4e9eeSJes Sorensen 1147e33460dSJoe Perches pr_info("Re-enabling Toshiba Bluetooth\n"); 11542b4e9eeSJes Sorensen res1 = acpi_evaluate_object(handle, "AUSB", NULL, NULL); 11642b4e9eeSJes Sorensen res2 = acpi_evaluate_object(handle, "BTPO", NULL, NULL); 11742b4e9eeSJes Sorensen if (!ACPI_FAILURE(res1) || !ACPI_FAILURE(res2)) 11842b4e9eeSJes Sorensen return 0; 11942b4e9eeSJes Sorensen 1207e33460dSJoe Perches pr_warn("Failed to re-enable Toshiba Bluetooth\n"); 12142b4e9eeSJes Sorensen 12242b4e9eeSJes Sorensen return -ENODEV; 12342b4e9eeSJes Sorensen } 12442b4e9eeSJes Sorensen 125bb2ea96bSAzael Avalos static int toshiba_bluetooth_disable(acpi_handle handle) 126bb2ea96bSAzael Avalos { 127bb2ea96bSAzael Avalos acpi_status result; 128bb2ea96bSAzael Avalos 129bb2ea96bSAzael Avalos result = acpi_evaluate_object(handle, "BTPF", NULL, NULL); 130bb2ea96bSAzael Avalos if (ACPI_FAILURE(result)) { 131bb2ea96bSAzael Avalos pr_err("Could not power OFF Bluetooth device\n"); 132bb2ea96bSAzael Avalos return -ENXIO; 133bb2ea96bSAzael Avalos } 134bb2ea96bSAzael Avalos 135bb2ea96bSAzael Avalos result = acpi_evaluate_object(handle, "DUSB", NULL, NULL); 136bb2ea96bSAzael Avalos if (ACPI_FAILURE(result)) { 137bb2ea96bSAzael Avalos pr_err("Could not detach USB Bluetooth device\n"); 138bb2ea96bSAzael Avalos return -ENXIO; 139bb2ea96bSAzael Avalos } 140bb2ea96bSAzael Avalos 141bb2ea96bSAzael Avalos return 0; 142bb2ea96bSAzael Avalos } 143bb2ea96bSAzael Avalos 14442b4e9eeSJes Sorensen static void toshiba_bt_rfkill_notify(struct acpi_device *device, u32 event) 14542b4e9eeSJes Sorensen { 14642b4e9eeSJes Sorensen toshiba_bluetooth_enable(device->handle); 14742b4e9eeSJes Sorensen } 14842b4e9eeSJes Sorensen 1493567a4e2SRafael J. Wysocki #ifdef CONFIG_PM_SLEEP 150d69239aeSRafael J. Wysocki static int toshiba_bt_resume(struct device *dev) 15142b4e9eeSJes Sorensen { 152d69239aeSRafael J. Wysocki return toshiba_bluetooth_enable(to_acpi_device(dev)->handle); 15342b4e9eeSJes Sorensen } 1543567a4e2SRafael J. Wysocki #endif 15542b4e9eeSJes Sorensen 15642b4e9eeSJes Sorensen static int toshiba_bt_rfkill_add(struct acpi_device *device) 15742b4e9eeSJes Sorensen { 15818b8696bSAzael Avalos int result; 15942b4e9eeSJes Sorensen 16018b8696bSAzael Avalos result = toshiba_bluetooth_present(device->handle); 16118b8696bSAzael Avalos if (result) 16218b8696bSAzael Avalos return result; 16342b4e9eeSJes Sorensen 16418b8696bSAzael Avalos pr_info("Toshiba ACPI Bluetooth device driver\n"); 16518b8696bSAzael Avalos 16618b8696bSAzael Avalos /* Enable the BT device */ 16742b4e9eeSJes Sorensen result = toshiba_bluetooth_enable(device->handle); 16818b8696bSAzael Avalos if (result) 16918b8696bSAzael Avalos return result; 17042b4e9eeSJes Sorensen 17142b4e9eeSJes Sorensen return result; 17242b4e9eeSJes Sorensen } 17342b4e9eeSJes Sorensen 17451fac838SRafael J. Wysocki static int toshiba_bt_rfkill_remove(struct acpi_device *device) 17542b4e9eeSJes Sorensen { 17642b4e9eeSJes Sorensen /* clean up */ 17718b8696bSAzael Avalos return toshiba_bluetooth_disable(device->handle); 17842b4e9eeSJes Sorensen } 17942b4e9eeSJes Sorensen 18001d17753SMika Westerberg module_acpi_driver(toshiba_bt_rfkill_driver); 181