// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   * Roccat KonePure driver for Linux
   *
   * Copyright (c) 2012 Stefan Achatz <erazor_de@users.sourceforge.net>
   */
  
  /*

   */
  
  /*
   * Roccat KonePure is a smaller version of KoneXTD with less buttons and lights.
   */

  #include <linux/types.h>

  #include <linux/device.h>
  #include <linux/input.h>
  #include <linux/hid.h>
  #include <linux/module.h>
  #include <linux/slab.h>
  #include <linux/hid-roccat.h>
  #include "hid-ids.h"
  #include "hid-roccat-common.h"

  enum {
  	KONEPURE_MOUSE_REPORT_NUMBER_BUTTON = 3,
  };

  struct konepure_mouse_report_button {
  	uint8_t report_number; /* always KONEPURE_MOUSE_REPORT_NUMBER_BUTTON */
  	uint8_t zero;
  	uint8_t type;
  	uint8_t data1;
  	uint8_t data2;
  	uint8_t zero2;
  	uint8_t unknown[2];
  } __packed;

  static struct class *konepure_class;

  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(control, 0x04, 0x03);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(actual_profile, 0x05, 0x03);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(profile_settings, 0x06, 0x1f);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(profile_buttons, 0x07, 0x3b);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(macro, 0x08, 0x0822);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(info, 0x09, 0x06);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(tcu, 0x0c, 0x04);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_R(tcu_image, 0x0c, 0x0404);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(sensor, 0x0f, 0x06);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(talk, 0x10, 0x10);
  
  static struct bin_attribute *konepure_bin_attrs[] = {

  	&bin_attr_actual_profile,

  	&bin_attr_control,

  	&bin_attr_info,

  	&bin_attr_talk,
  	&bin_attr_macro,

  	&bin_attr_sensor,
  	&bin_attr_tcu,

  	&bin_attr_tcu_image,

  	&bin_attr_profile_settings,
  	&bin_attr_profile_buttons,

  	NULL,
  };
  
  static const struct attribute_group konepure_group = {

  	.bin_attrs = konepure_bin_attrs,

  };
  
  static const struct attribute_group *konepure_groups[] = {
  	&konepure_group,
  	NULL,

  };

  static int konepure_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 roccat_common2_device *konepure;

  	int retval;
  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			!= USB_INTERFACE_PROTOCOL_MOUSE) {
  		hid_set_drvdata(hdev, NULL);
  		return 0;
  	}
  
  	konepure = kzalloc(sizeof(*konepure), GFP_KERNEL);
  	if (!konepure) {
  		hid_err(hdev, "can't alloc device descriptor
  ");
  		return -ENOMEM;
  	}
  	hid_set_drvdata(hdev, konepure);

  	retval = roccat_common2_device_init_struct(usb_dev, konepure);

  	if (retval) {

  		hid_err(hdev, "couldn't init KonePure device
  ");

  		goto exit_free;
  	}
  
  	retval = roccat_connect(konepure_class, hdev,
  			sizeof(struct konepure_mouse_report_button));
  	if (retval < 0) {
  		hid_err(hdev, "couldn't init char dev
  ");
  	} else {
  		konepure->chrdev_minor = retval;
  		konepure->roccat_claimed = 1;
  	}
  
  	return 0;
  exit_free:
  	kfree(konepure);
  	return retval;
  }
  
  static void konepure_remove_specials(struct hid_device *hdev)
  {
  	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);

  	struct roccat_common2_device *konepure;

  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			!= USB_INTERFACE_PROTOCOL_MOUSE)
  		return;
  
  	konepure = hid_get_drvdata(hdev);
  	if (konepure->roccat_claimed)
  		roccat_disconnect(konepure->chrdev_minor);
  	kfree(konepure);
  }
  
  static int konepure_probe(struct hid_device *hdev,
  		const struct hid_device_id *id)
  {
  	int retval;
  
  	retval = hid_parse(hdev);
  	if (retval) {
  		hid_err(hdev, "parse failed
  ");
  		goto exit;
  	}
  
  	retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
  	if (retval) {
  		hid_err(hdev, "hw start failed
  ");
  		goto exit;
  	}
  
  	retval = konepure_init_specials(hdev);
  	if (retval) {
  		hid_err(hdev, "couldn't install mouse
  ");
  		goto exit_stop;
  	}
  
  	return 0;
  
  exit_stop:
  	hid_hw_stop(hdev);
  exit:
  	return retval;
  }
  
  static void konepure_remove(struct hid_device *hdev)
  {
  	konepure_remove_specials(hdev);
  	hid_hw_stop(hdev);
  }
  
  static int konepure_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 roccat_common2_device *konepure = hid_get_drvdata(hdev);

  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			!= USB_INTERFACE_PROTOCOL_MOUSE)
  		return 0;
  
  	if (data[0] != KONEPURE_MOUSE_REPORT_NUMBER_BUTTON)
  		return 0;
  
  	if (konepure != NULL && konepure->roccat_claimed)
  		roccat_report_event(konepure->chrdev_minor, data);
  
  	return 0;
  }
  
  static const struct hid_device_id konepure_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPURE) },

  	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_KONEPURE_OPTICAL) },

  	{ }
  };
  
  MODULE_DEVICE_TABLE(hid, konepure_devices);
  
  static struct hid_driver konepure_driver = {
  		.name = "konepure",
  		.id_table = konepure_devices,
  		.probe = konepure_probe,
  		.remove = konepure_remove,
  		.raw_event = konepure_raw_event
  };
  
  static int __init konepure_init(void)
  {
  	int retval;
  
  	konepure_class = class_create(THIS_MODULE, "konepure");
  	if (IS_ERR(konepure_class))
  		return PTR_ERR(konepure_class);

  	konepure_class->dev_groups = konepure_groups;

  
  	retval = hid_register_driver(&konepure_driver);
  	if (retval)
  		class_destroy(konepure_class);
  	return retval;
  }
  
  static void __exit konepure_exit(void)
  {
  	hid_unregister_driver(&konepure_driver);
  	class_destroy(konepure_class);
  }
  
  module_init(konepure_init);
  module_exit(konepure_exit);
  
  MODULE_AUTHOR("Stefan Achatz");

  MODULE_DESCRIPTION("USB Roccat KonePure/Optical driver");

  MODULE_LICENSE("GPL v2");