1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Acer Wireless Radio Control Driver 4 * 5 * Copyright (C) 2017 Endless Mobile, Inc. 6 */ 7 8 #include <linux/acpi.h> 9 #include <linux/input.h> 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/pci_ids.h> 13 #include <linux/platform_device.h> 14 #include <linux/types.h> 15 16 static const struct acpi_device_id acer_wireless_acpi_ids[] = { 17 {"10251229", 0}, 18 {"", 0}, 19 }; 20 MODULE_DEVICE_TABLE(acpi, acer_wireless_acpi_ids); 21 22 static void acer_wireless_notify(acpi_handle handle, u32 event, void *data) 23 { 24 struct device *dev = data; 25 struct input_dev *idev = dev_get_drvdata(dev); 26 27 dev_dbg(dev, "event=%#x\n", event); 28 if (event != 0x80) { 29 dev_notice(dev, "Unknown SMKB event: %#x\n", event); 30 return; 31 } 32 input_report_key(idev, KEY_RFKILL, 1); 33 input_sync(idev); 34 input_report_key(idev, KEY_RFKILL, 0); 35 input_sync(idev); 36 } 37 38 static int acer_wireless_probe(struct platform_device *pdev) 39 { 40 struct acpi_device *adev; 41 struct input_dev *idev; 42 int ret; 43 44 adev = ACPI_COMPANION(&pdev->dev); 45 if (!adev) 46 return -ENODEV; 47 48 idev = devm_input_allocate_device(&pdev->dev); 49 if (!idev) 50 return -ENOMEM; 51 52 platform_set_drvdata(pdev, idev); 53 idev->name = "Acer Wireless Radio Control"; 54 idev->phys = "acer-wireless/input0"; 55 idev->id.bustype = BUS_HOST; 56 idev->id.vendor = PCI_VENDOR_ID_AI; 57 idev->id.product = 0x1229; 58 set_bit(EV_KEY, idev->evbit); 59 set_bit(KEY_RFKILL, idev->keybit); 60 61 ret = input_register_device(idev); 62 if (ret) 63 return ret; 64 65 return acpi_dev_install_notify_handler(adev, ACPI_DEVICE_NOTIFY, 66 acer_wireless_notify, 67 &pdev->dev); 68 } 69 70 static void acer_wireless_remove(struct platform_device *pdev) 71 { 72 acpi_dev_remove_notify_handler(ACPI_COMPANION(&pdev->dev), 73 ACPI_DEVICE_NOTIFY, 74 acer_wireless_notify); 75 } 76 77 static struct platform_driver acer_wireless_driver = { 78 .probe = acer_wireless_probe, 79 .remove = acer_wireless_remove, 80 .driver = { 81 .name = "Acer Wireless Radio Control Driver", 82 .acpi_match_table = acer_wireless_acpi_ids, 83 }, 84 }; 85 module_platform_driver(acer_wireless_driver); 86 87 MODULE_DESCRIPTION("Acer Wireless Radio Control Driver"); 88 MODULE_AUTHOR("Chris Chiu <chiu@gmail.com>"); 89 MODULE_LICENSE("GPL v2"); 90