Eric Lee / smarc-fsl-linux-kernel

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drivers/hid/hid-retrode.c 1.9 KB
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2874c5fd2   Thomas Gleixner   treewide: Replace... 
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  // SPDX-License-Identifier: GPL-2.0-or-later
13b2e1ba4   Bastien Nocera   HID: Add driver f... 
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  /*
   *  HID driver for Retrode 2 controller adapter and plug-in extensions
   *
   *  Copyright (c) 2017 Bastien Nocera <hadess@hadess.net>
   */
  
  /*
13b2e1ba4   Bastien Nocera   HID: Add driver f... 
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   */
  
  #include <linux/input.h>
  #include <linux/slab.h>
  #include <linux/hid.h>
  #include <linux/module.h>
  #include "hid-ids.h"
  
  #define CONTROLLER_NAME_BASE "Retrode"
  
  static int retrode_input_configured(struct hid_device *hdev,
  					struct hid_input *hi)
  {
  	struct hid_field *field = hi->report->field[0];
  	const char *suffix;
  	int number = 0;
  	char *name;
  
  	switch (field->report->id) {
  	case 0:
  		suffix = "SNES Mouse";
  		break;
  	case 1:
  	case 2:
  		suffix = "SNES / N64";
  		number = field->report->id;
  		break;
  	case 3:
  	case 4:
  		suffix = "Mega Drive";
  		number = field->report->id - 2;
  		break;
  	default:
  		hid_err(hdev, "Got unhandled report id %d
  ", field->report->id);
  		suffix = "Unknown";
  	}
  
  	if (number)
  		name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
  				"%s %s #%d", CONTROLLER_NAME_BASE,
  				suffix, number);
  	else
  		name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
  				"%s %s", CONTROLLER_NAME_BASE, suffix);
  
  	if (!name)
  		return -ENOMEM;
  
  	hi->input->name = name;
  
  	return 0;
  }
  
  static int retrode_probe(struct hid_device *hdev,
  			const struct hid_device_id *id)
  {
  
  	int ret;
  
  	/* Has no effect on the mouse device */
  	hdev->quirks |= HID_QUIRK_MULTI_INPUT;
  
  	ret = hid_parse(hdev);
  	if (ret)
  		return ret;
  
  	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
  	if (ret)
  		return ret;
  
  	return 0;
  }
  
  static const struct hid_device_id retrode_devices[] = {
  	{ HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
  	{ }
  };
  MODULE_DEVICE_TABLE(hid, retrode_devices);
  
  static struct hid_driver retrode_driver = {
  	.name             = "hid-retrode",
  	.id_table         = retrode_devices,
  	.input_configured = retrode_input_configured,
  	.probe            = retrode_probe,
  };
  
  module_hid_driver(retrode_driver);
  
  MODULE_LICENSE("GPL");