/*
   * Roccat Ryos driver for Linux
   *
   * Copyright (c) 2013 Stefan Achatz <erazor_de@users.sourceforge.net>
   */
  
  /*
   * 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.
   */
  
  #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 {
  	RYOS_REPORT_NUMBER_SPECIAL = 3,
  	RYOS_USB_INTERFACE_PROTOCOL = 0,
  };
  
  struct ryos_report_special {
  	uint8_t number; /* RYOS_REPORT_NUMBER_SPECIAL */
  	uint8_t data[4];
  } __packed;
  
  static struct class *ryos_class;
  
  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(control, 0x04, 0x03);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(profile, 0x05, 0x03);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(keys_primary, 0x06, 0x7d);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(keys_function, 0x07, 0x5f);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(keys_macro, 0x08, 0x23);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(keys_thumbster, 0x09, 0x17);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(keys_extra, 0x0a, 0x08);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(keys_easyzone, 0x0b, 0x126);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(key_mask, 0x0c, 0x06);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(light, 0x0d, 0x10);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(macro, 0x0e, 0x7d2);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_R(info, 0x0f, 0x08);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(reset, 0x11, 0x03);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(light_control, 0x13, 0x08);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(talk, 0x16, 0x10);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(stored_lights, 0x17, 0x0566);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_W(custom_lights, 0x18, 0x14);
  ROCCAT_COMMON2_BIN_ATTRIBUTE_RW(light_macro, 0x19, 0x07d2);
  
  static struct bin_attribute *ryos_bin_attrs[] = {
  	&bin_attr_control,
  	&bin_attr_profile,
  	&bin_attr_keys_primary,
  	&bin_attr_keys_function,
  	&bin_attr_keys_macro,
  	&bin_attr_keys_thumbster,
  	&bin_attr_keys_extra,
  	&bin_attr_keys_easyzone,
  	&bin_attr_key_mask,
  	&bin_attr_light,
  	&bin_attr_macro,
  	&bin_attr_info,
  	&bin_attr_reset,
  	&bin_attr_light_control,
  	&bin_attr_talk,
  	&bin_attr_stored_lights,
  	&bin_attr_custom_lights,
  	&bin_attr_light_macro,
  	NULL,
  };
  
  static const struct attribute_group ryos_group = {
  	.bin_attrs = ryos_bin_attrs,
  };
  
  static const struct attribute_group *ryos_groups[] = {
  	&ryos_group,
  	NULL,
  };
  
  static int ryos_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 *ryos;
  	int retval;
  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			!= RYOS_USB_INTERFACE_PROTOCOL) {
  		hid_set_drvdata(hdev, NULL);
  		return 0;
  	}
  
  	ryos = kzalloc(sizeof(*ryos), GFP_KERNEL);
  	if (!ryos) {
  		hid_err(hdev, "can't alloc device descriptor
  ");
  		return -ENOMEM;
  	}
  	hid_set_drvdata(hdev, ryos);
  
  	retval = roccat_common2_device_init_struct(usb_dev, ryos);
  	if (retval) {
  		hid_err(hdev, "couldn't init Ryos device
  ");
  		goto exit_free;
  	}
  
  	retval = roccat_connect(ryos_class, hdev,
  			sizeof(struct ryos_report_special));
  	if (retval < 0) {
  		hid_err(hdev, "couldn't init char dev
  ");
  	} else {
  		ryos->chrdev_minor = retval;
  		ryos->roccat_claimed = 1;
  	}
  
  	return 0;
  exit_free:
  	kfree(ryos);
  	return retval;
  }
  
  static void ryos_remove_specials(struct hid_device *hdev)
  {
  	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
  	struct roccat_common2_device *ryos;
  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			!= RYOS_USB_INTERFACE_PROTOCOL)
  		return;
  
  	ryos = hid_get_drvdata(hdev);
  	if (ryos->roccat_claimed)
  		roccat_disconnect(ryos->chrdev_minor);
  	kfree(ryos);
  }
  
  static int ryos_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 = ryos_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 ryos_remove(struct hid_device *hdev)
  {
  	ryos_remove_specials(hdev);
  	hid_hw_stop(hdev);
  }
  
  static int ryos_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 *ryos = hid_get_drvdata(hdev);
  
  	if (intf->cur_altsetting->desc.bInterfaceProtocol
  			!= RYOS_USB_INTERFACE_PROTOCOL)
  		return 0;
  
  	if (data[0] != RYOS_REPORT_NUMBER_SPECIAL)
  		return 0;
  
  	if (ryos != NULL && ryos->roccat_claimed)
  		roccat_report_event(ryos->chrdev_minor, data);
  
  	return 0;
  }
  
  static const struct hid_device_id ryos_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_RYOS_MK) },
  	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_RYOS_MK_GLOW) },
  	{ HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_RYOS_MK_PRO) },
  	{ }
  };
  
  MODULE_DEVICE_TABLE(hid, ryos_devices);
  
  static struct hid_driver ryos_driver = {
  		.name = "ryos",
  		.id_table = ryos_devices,
  		.probe = ryos_probe,
  		.remove = ryos_remove,
  		.raw_event = ryos_raw_event
  };
  
  static int __init ryos_init(void)
  {
  	int retval;
  
  	ryos_class = class_create(THIS_MODULE, "ryos");
  	if (IS_ERR(ryos_class))
  		return PTR_ERR(ryos_class);
  	ryos_class->dev_groups = ryos_groups;
  
  	retval = hid_register_driver(&ryos_driver);
  	if (retval)
  		class_destroy(ryos_class);
  	return retval;
  }
  
  static void __exit ryos_exit(void)
  {
  	hid_unregister_driver(&ryos_driver);
  	class_destroy(ryos_class);
  }
  
  module_init(ryos_init);
  module_exit(ryos_exit);
  
  MODULE_AUTHOR("Stefan Achatz");
  MODULE_DESCRIPTION("USB Roccat Ryos MK/Glow/Pro driver");
  MODULE_LICENSE("GPL v2");