newtonkbd.c 3.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * Copyright (c) 2000 Justin Cormack
  4. */
  5. /*
  6. * Newton keyboard driver for Linux
  7. */
  8. /*
  9. */
  10. #include <linux/slab.h>
  11. #include <linux/module.h>
  12. #include <linux/input.h>
  13. #include <linux/serio.h>
  14. #define DRIVER_DESC "Newton keyboard driver"
  15. MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
  16. MODULE_DESCRIPTION(DRIVER_DESC);
  17. MODULE_LICENSE("GPL");
  18. #define NKBD_KEY 0x7f
  19. #define NKBD_PRESS 0x80
  20. static unsigned char nkbd_keycode[128] = {
  21. KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
  22. KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
  23. KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
  24. KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
  25. KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
  26. KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
  27. KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
  28. KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
  29. 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  30. 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  31. 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  32. 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  33. KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
  34. };
  35. struct nkbd {
  36. unsigned char keycode[128];
  37. struct input_dev *dev;
  38. struct serio *serio;
  39. char phys[32];
  40. };
  41. static irqreturn_t nkbd_interrupt(struct serio *serio,
  42. unsigned char data, unsigned int flags)
  43. {
  44. struct nkbd *nkbd = serio_get_drvdata(serio);
  45. /* invalid scan codes are probably the init sequence, so we ignore them */
  46. if (nkbd->keycode[data & NKBD_KEY]) {
  47. input_report_key(nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
  48. input_sync(nkbd->dev);
  49. }
  50. else if (data == 0xe7) /* end of init sequence */
  51. printk(KERN_INFO "input: %s on %s\n", nkbd->dev->name, serio->phys);
  52. return IRQ_HANDLED;
  53. }
  54. static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
  55. {
  56. struct nkbd *nkbd;
  57. struct input_dev *input_dev;
  58. int err = -ENOMEM;
  59. int i;
  60. nkbd = kzalloc(sizeof(struct nkbd), GFP_KERNEL);
  61. input_dev = input_allocate_device();
  62. if (!nkbd || !input_dev)
  63. goto fail1;
  64. nkbd->serio = serio;
  65. nkbd->dev = input_dev;
  66. snprintf(nkbd->phys, sizeof(nkbd->phys), "%s/input0", serio->phys);
  67. memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
  68. input_dev->name = "Newton Keyboard";
  69. input_dev->phys = nkbd->phys;
  70. input_dev->id.bustype = BUS_RS232;
  71. input_dev->id.vendor = SERIO_NEWTON;
  72. input_dev->id.product = 0x0001;
  73. input_dev->id.version = 0x0100;
  74. input_dev->dev.parent = &serio->dev;
  75. input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
  76. input_dev->keycode = nkbd->keycode;
  77. input_dev->keycodesize = sizeof(unsigned char);
  78. input_dev->keycodemax = ARRAY_SIZE(nkbd_keycode);
  79. for (i = 0; i < 128; i++)
  80. set_bit(nkbd->keycode[i], input_dev->keybit);
  81. clear_bit(0, input_dev->keybit);
  82. serio_set_drvdata(serio, nkbd);
  83. err = serio_open(serio, drv);
  84. if (err)
  85. goto fail2;
  86. err = input_register_device(nkbd->dev);
  87. if (err)
  88. goto fail3;
  89. return 0;
  90. fail3: serio_close(serio);
  91. fail2: serio_set_drvdata(serio, NULL);
  92. fail1: input_free_device(input_dev);
  93. kfree(nkbd);
  94. return err;
  95. }
  96. static void nkbd_disconnect(struct serio *serio)
  97. {
  98. struct nkbd *nkbd = serio_get_drvdata(serio);
  99. serio_close(serio);
  100. serio_set_drvdata(serio, NULL);
  101. input_unregister_device(nkbd->dev);
  102. kfree(nkbd);
  103. }
  104. static const struct serio_device_id nkbd_serio_ids[] = {
  105. {
  106. .type = SERIO_RS232,
  107. .proto = SERIO_NEWTON,
  108. .id = SERIO_ANY,
  109. .extra = SERIO_ANY,
  110. },
  111. { 0 }
  112. };
  113. MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
  114. static struct serio_driver nkbd_drv = {
  115. .driver = {
  116. .name = "newtonkbd",
  117. },
  118. .description = DRIVER_DESC,
  119. .id_table = nkbd_serio_ids,
  120. .interrupt = nkbd_interrupt,
  121. .connect = nkbd_connect,
  122. .disconnect = nkbd_disconnect,
  123. };
  124. module_serio_driver(nkbd_drv);