hid-retrode.c 1.9 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * HID driver for Retrode 2 controller adapter and plug-in extensions
  4. *
  5. * Copyright (c) 2017 Bastien Nocera <hadess@hadess.net>
  6. */
  7. /*
  8. */
  9. #include <linux/input.h>
  10. #include <linux/slab.h>
  11. #include <linux/hid.h>
  12. #include <linux/module.h>
  13. #include "hid-ids.h"
  14. #define CONTROLLER_NAME_BASE "Retrode"
  15. static int retrode_input_configured(struct hid_device *hdev,
  16. struct hid_input *hi)
  17. {
  18. struct hid_field *field = hi->report->field[0];
  19. const char *suffix;
  20. int number = 0;
  21. char *name;
  22. switch (field->report->id) {
  23. case 0:
  24. suffix = "SNES Mouse";
  25. break;
  26. case 1:
  27. case 2:
  28. suffix = "SNES / N64";
  29. number = field->report->id;
  30. break;
  31. case 3:
  32. case 4:
  33. suffix = "Mega Drive";
  34. number = field->report->id - 2;
  35. break;
  36. default:
  37. hid_err(hdev, "Got unhandled report id %d\n", field->report->id);
  38. suffix = "Unknown";
  39. }
  40. if (number)
  41. name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
  42. "%s %s #%d", CONTROLLER_NAME_BASE,
  43. suffix, number);
  44. else
  45. name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
  46. "%s %s", CONTROLLER_NAME_BASE, suffix);
  47. if (!name)
  48. return -ENOMEM;
  49. hi->input->name = name;
  50. return 0;
  51. }
  52. static int retrode_probe(struct hid_device *hdev,
  53. const struct hid_device_id *id)
  54. {
  55. int ret;
  56. /* Has no effect on the mouse device */
  57. hdev->quirks |= HID_QUIRK_MULTI_INPUT;
  58. ret = hid_parse(hdev);
  59. if (ret)
  60. return ret;
  61. ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
  62. if (ret)
  63. return ret;
  64. return 0;
  65. }
  66. static const struct hid_device_id retrode_devices[] = {
  67. { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) },
  68. { }
  69. };
  70. MODULE_DEVICE_TABLE(hid, retrode_devices);
  71. static struct hid_driver retrode_driver = {
  72. .name = "hid-retrode",
  73. .id_table = retrode_devices,
  74. .input_configured = retrode_input_configured,
  75. .probe = retrode_probe,
  76. };
  77. module_hid_driver(retrode_driver);
  78. MODULE_LICENSE("GPL");