maple_keyb.c 7.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * SEGA Dreamcast keyboard driver
  4. * Based on drivers/usb/usbkbd.c
  5. * Copyright (c) YAEGASHI Takeshi, 2001
  6. * Porting to 2.6 Copyright (c) Adrian McMenamin, 2007 - 2009
  7. */
  8. #include <linux/kernel.h>
  9. #include <linux/slab.h>
  10. #include <linux/input.h>
  11. #include <linux/module.h>
  12. #include <linux/init.h>
  13. #include <linux/timer.h>
  14. #include <linux/maple.h>
  15. /* Very simple mutex to ensure proper cleanup */
  16. static DEFINE_MUTEX(maple_keyb_mutex);
  17. #define NR_SCANCODES 256
  18. MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk");
  19. MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver");
  20. MODULE_LICENSE("GPL");
  21. struct dc_kbd {
  22. struct input_dev *dev;
  23. unsigned short keycode[NR_SCANCODES];
  24. unsigned char new[8];
  25. unsigned char old[8];
  26. };
  27. static const unsigned short dc_kbd_keycode[NR_SCANCODES] = {
  28. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_A, KEY_B,
  29. KEY_C, KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J, KEY_K, KEY_L,
  30. KEY_M, KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, KEY_S, KEY_T, KEY_U, KEY_V,
  31. KEY_W, KEY_X, KEY_Y, KEY_Z, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6,
  32. KEY_7, KEY_8, KEY_9, KEY_0, KEY_ENTER, KEY_ESC, KEY_BACKSPACE,
  33. KEY_TAB, KEY_SPACE, KEY_MINUS, KEY_EQUAL, KEY_LEFTBRACE,
  34. KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_BACKSLASH, KEY_SEMICOLON,
  35. KEY_APOSTROPHE, KEY_GRAVE, KEY_COMMA, KEY_DOT, KEY_SLASH,
  36. KEY_CAPSLOCK, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6,
  37. KEY_F7, KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, KEY_SYSRQ,
  38. KEY_SCROLLLOCK, KEY_PAUSE, KEY_INSERT, KEY_HOME, KEY_PAGEUP,
  39. KEY_DELETE, KEY_END, KEY_PAGEDOWN, KEY_RIGHT, KEY_LEFT, KEY_DOWN,
  40. KEY_UP, KEY_NUMLOCK, KEY_KPSLASH, KEY_KPASTERISK, KEY_KPMINUS,
  41. KEY_KPPLUS, KEY_KPENTER, KEY_KP1, KEY_KP2, KEY_KP3, KEY_KP4, KEY_KP5,
  42. KEY_KP6, KEY_KP7, KEY_KP8, KEY_KP9, KEY_KP0, KEY_KPDOT, KEY_102ND,
  43. KEY_COMPOSE, KEY_POWER, KEY_KPEQUAL, KEY_F13, KEY_F14, KEY_F15,
  44. KEY_F16, KEY_F17, KEY_F18, KEY_F19, KEY_F20, KEY_F21, KEY_F22,
  45. KEY_F23, KEY_F24, KEY_OPEN, KEY_HELP, KEY_PROPS, KEY_FRONT, KEY_STOP,
  46. KEY_AGAIN, KEY_UNDO, KEY_CUT, KEY_COPY, KEY_PASTE, KEY_FIND, KEY_MUTE,
  47. KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  48. KEY_KPCOMMA, KEY_RESERVED, KEY_RO, KEY_KATAKANAHIRAGANA , KEY_YEN,
  49. KEY_HENKAN, KEY_MUHENKAN, KEY_KPJPCOMMA, KEY_RESERVED, KEY_RESERVED,
  50. KEY_RESERVED, KEY_HANGEUL, KEY_HANJA, KEY_KATAKANA, KEY_HIRAGANA,
  51. KEY_ZENKAKUHANKAKU, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  52. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  53. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  54. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  55. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  56. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  57. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  58. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  59. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  60. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  61. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  62. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  63. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  64. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  65. KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED,
  66. KEY_RESERVED, KEY_RESERVED, KEY_LEFTCTRL, KEY_LEFTSHIFT, KEY_LEFTALT,
  67. KEY_LEFTMETA, KEY_RIGHTCTRL, KEY_RIGHTSHIFT, KEY_RIGHTALT,
  68. KEY_RIGHTMETA, KEY_PLAYPAUSE, KEY_STOPCD, KEY_PREVIOUSSONG,
  69. KEY_NEXTSONG, KEY_EJECTCD, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,
  70. KEY_WWW, KEY_BACK, KEY_FORWARD, KEY_STOP, KEY_FIND, KEY_SCROLLUP,
  71. KEY_SCROLLDOWN, KEY_EDIT, KEY_SLEEP, KEY_SCREENLOCK, KEY_REFRESH,
  72. KEY_CALC, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED, KEY_RESERVED
  73. };
  74. static void dc_scan_kbd(struct dc_kbd *kbd)
  75. {
  76. struct input_dev *dev = kbd->dev;
  77. void *ptr;
  78. int code, keycode;
  79. int i;
  80. for (i = 0; i < 8; i++) {
  81. code = i + 224;
  82. keycode = kbd->keycode[code];
  83. input_event(dev, EV_MSC, MSC_SCAN, code);
  84. input_report_key(dev, keycode, (kbd->new[0] >> i) & 1);
  85. }
  86. for (i = 2; i < 8; i++) {
  87. ptr = memchr(kbd->new + 2, kbd->old[i], 6);
  88. code = kbd->old[i];
  89. if (code > 3 && ptr == NULL) {
  90. keycode = kbd->keycode[code];
  91. if (keycode) {
  92. input_event(dev, EV_MSC, MSC_SCAN, code);
  93. input_report_key(dev, keycode, 0);
  94. } else
  95. dev_dbg(&dev->dev,
  96. "Unknown key (scancode %#x) released.",
  97. code);
  98. }
  99. ptr = memchr(kbd->old + 2, kbd->new[i], 6);
  100. code = kbd->new[i];
  101. if (code > 3 && ptr) {
  102. keycode = kbd->keycode[code];
  103. if (keycode) {
  104. input_event(dev, EV_MSC, MSC_SCAN, code);
  105. input_report_key(dev, keycode, 1);
  106. } else
  107. dev_dbg(&dev->dev,
  108. "Unknown key (scancode %#x) pressed.",
  109. code);
  110. }
  111. }
  112. input_sync(dev);
  113. memcpy(kbd->old, kbd->new, 8);
  114. }
  115. static void dc_kbd_callback(struct mapleq *mq)
  116. {
  117. struct maple_device *mapledev = mq->dev;
  118. struct dc_kbd *kbd = maple_get_drvdata(mapledev);
  119. unsigned long *buf = (unsigned long *)(mq->recvbuf->buf);
  120. /*
  121. * We should always get the lock because the only
  122. * time it may be locked is if the driver is in the cleanup phase.
  123. */
  124. if (likely(mutex_trylock(&maple_keyb_mutex))) {
  125. if (buf[1] == mapledev->function) {
  126. memcpy(kbd->new, buf + 2, 8);
  127. dc_scan_kbd(kbd);
  128. }
  129. mutex_unlock(&maple_keyb_mutex);
  130. }
  131. }
  132. static int probe_maple_kbd(struct device *dev)
  133. {
  134. struct maple_device *mdev;
  135. struct maple_driver *mdrv;
  136. int i, error;
  137. struct dc_kbd *kbd;
  138. struct input_dev *idev;
  139. mdev = to_maple_dev(dev);
  140. mdrv = to_maple_driver(dev->driver);
  141. kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL);
  142. if (!kbd) {
  143. error = -ENOMEM;
  144. goto fail;
  145. }
  146. idev = input_allocate_device();
  147. if (!idev) {
  148. error = -ENOMEM;
  149. goto fail_idev_alloc;
  150. }
  151. kbd->dev = idev;
  152. memcpy(kbd->keycode, dc_kbd_keycode, sizeof(kbd->keycode));
  153. idev->name = mdev->product_name;
  154. idev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
  155. idev->keycode = kbd->keycode;
  156. idev->keycodesize = sizeof(unsigned short);
  157. idev->keycodemax = ARRAY_SIZE(kbd->keycode);
  158. idev->id.bustype = BUS_HOST;
  159. idev->dev.parent = &mdev->dev;
  160. for (i = 0; i < NR_SCANCODES; i++)
  161. __set_bit(dc_kbd_keycode[i], idev->keybit);
  162. __clear_bit(KEY_RESERVED, idev->keybit);
  163. input_set_capability(idev, EV_MSC, MSC_SCAN);
  164. error = input_register_device(idev);
  165. if (error)
  166. goto fail_register;
  167. /* Maple polling is locked to VBLANK - which may be just 50/s */
  168. maple_getcond_callback(mdev, dc_kbd_callback, HZ/50,
  169. MAPLE_FUNC_KEYBOARD);
  170. mdev->driver = mdrv;
  171. maple_set_drvdata(mdev, kbd);
  172. return error;
  173. fail_register:
  174. maple_set_drvdata(mdev, NULL);
  175. input_free_device(idev);
  176. fail_idev_alloc:
  177. kfree(kbd);
  178. fail:
  179. return error;
  180. }
  181. static int remove_maple_kbd(struct device *dev)
  182. {
  183. struct maple_device *mdev = to_maple_dev(dev);
  184. struct dc_kbd *kbd = maple_get_drvdata(mdev);
  185. mutex_lock(&maple_keyb_mutex);
  186. input_unregister_device(kbd->dev);
  187. kfree(kbd);
  188. maple_set_drvdata(mdev, NULL);
  189. mutex_unlock(&maple_keyb_mutex);
  190. return 0;
  191. }
  192. static struct maple_driver dc_kbd_driver = {
  193. .function = MAPLE_FUNC_KEYBOARD,
  194. .drv = {
  195. .name = "Dreamcast_keyboard",
  196. .probe = probe_maple_kbd,
  197. .remove = remove_maple_kbd,
  198. },
  199. };
  200. static int __init dc_kbd_init(void)
  201. {
  202. return maple_driver_register(&dc_kbd_driver);
  203. }
  204. static void __exit dc_kbd_exit(void)
  205. {
  206. maple_driver_unregister(&dc_kbd_driver);
  207. }
  208. module_init(dc_kbd_init);
  209. module_exit(dc_kbd_exit);