/* * Roccat Savu driver for Linux * * Copyright (c) 2012 Stefan Achatz */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ /* Roccat Savu is a gamer mouse with macro keys that can be configured in * 5 profiles. */ #include #include #include #include #include #include #include "hid-ids.h" #include "hid-roccat-common.h" #include "hid-roccat-savu.h" static struct class *savu_class; static ssize_t savu_sysfs_read(struct file *fp, struct kobject *kobj, char *buf, loff_t off, size_t count, size_t real_size, uint command) { struct device *dev = container_of(kobj, struct device, kobj)->parent->parent; struct savu_device *savu = hid_get_drvdata(dev_get_drvdata(dev)); struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev)); int retval; if (off >= real_size) return 0; if (off != 0 || count != real_size) return -EINVAL; mutex_lock(&savu->savu_lock); retval = roccat_common2_receive(usb_dev, command, buf, real_size); mutex_unlock(&savu->savu_lock); return retval ? retval : real_size; } static ssize_t savu_sysfs_write(struct file *fp, struct kobject *kobj, void const *buf, loff_t off, size_t count, size_t real_size, uint command) { struct device *dev = container_of(kobj, struct device, kobj)->parent->parent; struct savu_device *savu = hid_get_drvdata(dev_get_drvdata(dev)); struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev)); int retval; if (off != 0 || count != real_size) return -EINVAL; mutex_lock(&savu->savu_lock); retval = roccat_common2_send_with_status(usb_dev, command, (void *)buf, real_size); mutex_unlock(&savu->savu_lock); return retval ? retval : real_size; } #define SAVU_SYSFS_W(thingy, THINGY) \ static ssize_t savu_sysfs_write_ ## thingy(struct file *fp, \ struct kobject *kobj, struct bin_attribute *attr, char *buf, \ loff_t off, size_t count) \ { \ return savu_sysfs_write(fp, kobj, buf, off, count, \ SAVU_SIZE_ ## THINGY, SAVU_COMMAND_ ## THINGY); \ } #define SAVU_SYSFS_R(thingy, THINGY) \ static ssize_t savu_sysfs_read_ ## thingy(struct file *fp, \ struct kobject *kobj, struct bin_attribute *attr, char *buf, \ loff_t off, size_t count) \ { \ return savu_sysfs_read(fp, kobj, buf, off, count, \ SAVU_SIZE_ ## THINGY, SAVU_COMMAND_ ## THINGY); \ } #define SAVU_SYSFS_RW(thingy, THINGY) \ SAVU_SYSFS_W(thingy, THINGY) \ SAVU_SYSFS_R(thingy, THINGY) #define SAVU_BIN_ATTRIBUTE_RW(thingy, THINGY) \ { \ .attr = { .name = #thingy, .mode = 0660 }, \ .size = SAVU_SIZE_ ## THINGY, \ .read = savu_sysfs_read_ ## thingy, \ .write = savu_sysfs_write_ ## thingy \ } #define SAVU_BIN_ATTRIBUTE_R(thingy, THINGY) \ { \ .attr = { .name = #thingy, .mode = 0440 }, \ .size = SAVU_SIZE_ ## THINGY, \ .read = savu_sysfs_read_ ## thingy, \ } #define SAVU_BIN_ATTRIBUTE_W(thingy, THINGY) \ { \ .attr = { .name = #thingy, .mode = 0220 }, \ .size = SAVU_SIZE_ ## THINGY, \ .write = savu_sysfs_write_ ## thingy \ } SAVU_SYSFS_W(control, CONTROL) SAVU_SYSFS_RW(profile, PROFILE) SAVU_SYSFS_RW(general, GENERAL) SAVU_SYSFS_RW(buttons, BUTTONS) SAVU_SYSFS_RW(macro, MACRO) SAVU_SYSFS_R(info, INFO) static struct bin_attribute savu_bin_attributes[] = { SAVU_BIN_ATTRIBUTE_W(control, CONTROL), SAVU_BIN_ATTRIBUTE_RW(profile, PROFILE), SAVU_BIN_ATTRIBUTE_RW(general, GENERAL), SAVU_BIN_ATTRIBUTE_RW(buttons, BUTTONS), SAVU_BIN_ATTRIBUTE_RW(macro, MACRO), SAVU_BIN_ATTRIBUTE_R(info, INFO), __ATTR_NULL }; static int savu_init_savu_device_struct(struct usb_device *usb_dev, struct savu_device *savu) { mutex_init(&savu->savu_lock); return 0; } static int savu_init_specials(struct hid_device *hdev) { struct usb_interface *intf = to_usb_interface(hdev->dev.parent); struct usb_device *usb_dev = interface_to_usbdev(intf); struct savu_device *savu; int retval; if (intf->cur_altsetting->desc.bInterfaceProtocol != USB_INTERFACE_PROTOCOL_MOUSE) { hid_set_drvdata(hdev, NULL); return 0; } savu = kzalloc(sizeof(*savu), GFP_KERNEL); if (!savu) { hid_err(hdev, "can't alloc device descriptor\n"); return -ENOMEM; } hid_set_drvdata(hdev, savu); retval = savu_init_savu_device_struct(usb_dev, savu); if (retval) { hid_err(hdev, "couldn't init struct savu_device\n"); goto exit_free; } retval = roccat_connect(savu_class, hdev, sizeof(struct savu_roccat_report)); if (retval < 0) { hid_err(hdev, "couldn't init char dev\n"); } else { savu->chrdev_minor = retval; savu->roccat_claimed = 1; } return 0; exit_free: kfree(savu); return retval; } static void savu_remove_specials(struct hid_device *hdev) { struct usb_interface *intf = to_usb_interface(hdev->dev.parent); struct savu_device *savu; if (intf->cur_altsetting->desc.bInterfaceProtocol != USB_INTERFACE_PROTOCOL_MOUSE) return; savu = hid_get_drvdata(hdev); if (savu->roccat_claimed) roccat_disconnect(savu->chrdev_minor); kfree(savu); } static int savu_probe(struct hid_device *hdev, const struct hid_device_id *id) { int retval; retval = hid_parse(hdev); if (retval) { hid_err(hdev, "parse failed\n"); goto exit; } retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (retval) { hid_err(hdev, "hw start failed\n"); goto exit; } retval = savu_init_specials(hdev); if (retval) { hid_err(hdev, "couldn't install mouse\n"); goto exit_stop; } return 0; exit_stop: hid_hw_stop(hdev); exit: return retval; } static void savu_remove(struct hid_device *hdev) { savu_remove_specials(hdev); hid_hw_stop(hdev); } static void savu_report_to_chrdev(struct savu_device const *savu, u8 const *data) { struct savu_roccat_report roccat_report; struct savu_mouse_report_special const *special_report; if (data[0] != SAVU_MOUSE_REPORT_NUMBER_SPECIAL) return; special_report = (struct savu_mouse_report_special const *)data; roccat_report.type = special_report->type; roccat_report.data[0] = special_report->data[0]; roccat_report.data[1] = special_report->data[1]; roccat_report_event(savu->chrdev_minor, (uint8_t const *)&roccat_report); } static int savu_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) { struct usb_interface *intf = to_usb_interface(hdev->dev.parent); struct savu_device *savu = hid_get_drvdata(hdev); if (intf->cur_altsetting->desc.bInterfaceProtocol != USB_INTERFACE_PROTOCOL_MOUSE) return 0; if (savu == NULL) return 0; if (savu->roccat_claimed) savu_report_to_chrdev(savu, data); return 0; } static const struct hid_device_id savu_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_SAVU) }, { } }; MODULE_DEVICE_TABLE(hid, savu_devices); static struct hid_driver savu_driver = { .name = "savu", .id_table = savu_devices, .probe = savu_probe, .remove = savu_remove, .raw_event = savu_raw_event }; static int __init savu_init(void) { int retval; savu_class = class_create(THIS_MODULE, "savu"); if (IS_ERR(savu_class)) return PTR_ERR(savu_class); savu_class->dev_bin_attrs = savu_bin_attributes; retval = hid_register_driver(&savu_driver); if (retval) class_destroy(savu_class); return retval; } static void __exit savu_exit(void) { hid_unregister_driver(&savu_driver); class_destroy(savu_class); } module_init(savu_init); module_exit(savu_exit); MODULE_AUTHOR("Stefan Achatz"); MODULE_DESCRIPTION("USB Roccat Savu driver"); MODULE_LICENSE("GPL v2");