1 /* 2 * Roccat Savu driver for Linux 3 * 4 * Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net> 5 */ 6 7 /* 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the Free 10 * Software Foundation; either version 2 of the License, or (at your option) 11 * any later version. 12 */ 13 14 /* Roccat Savu is a gamer mouse with macro keys that can be configured in 15 * 5 profiles. 16 */ 17 18 #include <linux/device.h> 19 #include <linux/input.h> 20 #include <linux/hid.h> 21 #include <linux/module.h> 22 #include <linux/slab.h> 23 #include <linux/hid-roccat.h> 24 #include "hid-ids.h" 25 #include "hid-roccat-common.h" 26 #include "hid-roccat-savu.h" 27 28 static struct class *savu_class; 29 30 ROCCAT_COMMON2_BIN_ATTRIBUTE_W(control, 0x4, 0x03); 31 ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(profile, 0x5, 0x03); 32 ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(general, 0x6, 0x10); 33 ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(buttons, 0x7, 0x2f); 34 ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(macro, 0x8, 0x0823); 35 ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(info, 0x9, 0x08); 36 ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(sensor, 0xc, 0x04); 37 38 static struct bin_attribute *savu_bin_attrs[] = { 39 &bin_attr_control, 40 &bin_attr_profile, 41 &bin_attr_general, 42 &bin_attr_buttons, 43 &bin_attr_macro, 44 &bin_attr_info, 45 &bin_attr_sensor, 46 NULL, 47 }; 48 49 static const struct attribute_group savu_group = { 50 .bin_attrs = savu_bin_attrs, 51 }; 52 53 static const struct attribute_group *savu_groups[] = { 54 &savu_group, 55 NULL, 56 }; 57 58 static int savu_init_specials(struct hid_device *hdev) 59 { 60 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 61 struct usb_device *usb_dev = interface_to_usbdev(intf); 62 struct roccat_common2_device *savu; 63 int retval; 64 65 if (intf->cur_altsetting->desc.bInterfaceProtocol 66 != USB_INTERFACE_PROTOCOL_MOUSE) { 67 hid_set_drvdata(hdev, NULL); 68 return 0; 69 } 70 71 savu = kzalloc(sizeof(*savu), GFP_KERNEL); 72 if (!savu) { 73 hid_err(hdev, "can't alloc device descriptor\n"); 74 return -ENOMEM; 75 } 76 hid_set_drvdata(hdev, savu); 77 78 retval = roccat_common2_device_init_struct(usb_dev, savu); 79 if (retval) { 80 hid_err(hdev, "couldn't init Savu device\n"); 81 goto exit_free; 82 } 83 84 retval = roccat_connect(savu_class, hdev, 85 sizeof(struct savu_roccat_report)); 86 if (retval < 0) { 87 hid_err(hdev, "couldn't init char dev\n"); 88 } else { 89 savu->chrdev_minor = retval; 90 savu->roccat_claimed = 1; 91 } 92 93 return 0; 94 exit_free: 95 kfree(savu); 96 return retval; 97 } 98 99 static void savu_remove_specials(struct hid_device *hdev) 100 { 101 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 102 struct roccat_common2_device *savu; 103 104 if (intf->cur_altsetting->desc.bInterfaceProtocol 105 != USB_INTERFACE_PROTOCOL_MOUSE) 106 return; 107 108 savu = hid_get_drvdata(hdev); 109 if (savu->roccat_claimed) 110 roccat_disconnect(savu->chrdev_minor); 111 kfree(savu); 112 } 113 114 static int savu_probe(struct hid_device *hdev, 115 const struct hid_device_id *id) 116 { 117 int retval; 118 119 retval = hid_parse(hdev); 120 if (retval) { 121 hid_err(hdev, "parse failed\n"); 122 goto exit; 123 } 124 125 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 126 if (retval) { 127 hid_err(hdev, "hw start failed\n"); 128 goto exit; 129 } 130 131 retval = savu_init_specials(hdev); 132 if (retval) { 133 hid_err(hdev, "couldn't install mouse\n"); 134 goto exit_stop; 135 } 136 137 return 0; 138 139 exit_stop: 140 hid_hw_stop(hdev); 141 exit: 142 return retval; 143 } 144 145 static void savu_remove(struct hid_device *hdev) 146 { 147 savu_remove_specials(hdev); 148 hid_hw_stop(hdev); 149 } 150 151 static void savu_report_to_chrdev(struct roccat_common2_device const *savu, 152 u8 const *data) 153 { 154 struct savu_roccat_report roccat_report; 155 struct savu_mouse_report_special const *special_report; 156 157 if (data[0] != SAVU_MOUSE_REPORT_NUMBER_SPECIAL) 158 return; 159 160 special_report = (struct savu_mouse_report_special const *)data; 161 162 roccat_report.type = special_report->type; 163 roccat_report.data[0] = special_report->data[0]; 164 roccat_report.data[1] = special_report->data[1]; 165 roccat_report_event(savu->chrdev_minor, 166 (uint8_t const *)&roccat_report); 167 } 168 169 static int savu_raw_event(struct hid_device *hdev, 170 struct hid_report *report, u8 *data, int size) 171 { 172 struct usb_interface *intf = to_usb_interface(hdev->dev.parent); 173 struct roccat_common2_device *savu = hid_get_drvdata(hdev); 174 175 if (intf->cur_altsetting->desc.bInterfaceProtocol 176 != USB_INTERFACE_PROTOCOL_MOUSE) 177 return 0; 178 179 if (savu == NULL) 180 return 0; 181 182 if (savu->roccat_claimed) 183 savu_report_to_chrdev(savu, data); 184 185 return 0; 186 } 187 188 static const struct hid_device_id savu_devices[] = { 189 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_SAVU) }, 190 { } 191 }; 192 193 MODULE_DEVICE_TABLE(hid, savu_devices); 194 195 static struct hid_driver savu_driver = { 196 .name = "savu", 197 .id_table = savu_devices, 198 .probe = savu_probe, 199 .remove = savu_remove, 200 .raw_event = savu_raw_event 201 }; 202 203 static int __init savu_init(void) 204 { 205 int retval; 206 207 savu_class = class_create(THIS_MODULE, "savu"); 208 if (IS_ERR(savu_class)) 209 return PTR_ERR(savu_class); 210 savu_class->dev_groups = savu_groups; 211 212 retval = hid_register_driver(&savu_driver); 213 if (retval) 214 class_destroy(savu_class); 215 return retval; 216 } 217 218 static void __exit savu_exit(void) 219 { 220 hid_unregister_driver(&savu_driver); 221 class_destroy(savu_class); 222 } 223 224 module_init(savu_init); 225 module_exit(savu_exit); 226 227 MODULE_AUTHOR("Stefan Achatz"); 228 MODULE_DESCRIPTION("USB Roccat Savu driver"); 229 MODULE_LICENSE("GPL v2"); 230