amikbd.c 5.7 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260
  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * Copyright (c) 2000-2001 Vojtech Pavlik
  4. *
  5. * Based on the work of:
  6. * Hamish Macdonald
  7. */
  8. /*
  9. * Amiga keyboard driver for Linux/m68k
  10. */
  11. /*
  12. */
  13. #include <linux/module.h>
  14. #include <linux/init.h>
  15. #include <linux/input.h>
  16. #include <linux/delay.h>
  17. #include <linux/interrupt.h>
  18. #include <linux/keyboard.h>
  19. #include <linux/platform_device.h>
  20. #include <asm/amigaints.h>
  21. #include <asm/amigahw.h>
  22. #include <asm/irq.h>
  23. MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  24. MODULE_DESCRIPTION("Amiga keyboard driver");
  25. MODULE_LICENSE("GPL");
  26. #ifdef CONFIG_HW_CONSOLE
  27. static unsigned char amikbd_keycode[0x78] __initdata = {
  28. [0] = KEY_GRAVE,
  29. [1] = KEY_1,
  30. [2] = KEY_2,
  31. [3] = KEY_3,
  32. [4] = KEY_4,
  33. [5] = KEY_5,
  34. [6] = KEY_6,
  35. [7] = KEY_7,
  36. [8] = KEY_8,
  37. [9] = KEY_9,
  38. [10] = KEY_0,
  39. [11] = KEY_MINUS,
  40. [12] = KEY_EQUAL,
  41. [13] = KEY_BACKSLASH,
  42. [15] = KEY_KP0,
  43. [16] = KEY_Q,
  44. [17] = KEY_W,
  45. [18] = KEY_E,
  46. [19] = KEY_R,
  47. [20] = KEY_T,
  48. [21] = KEY_Y,
  49. [22] = KEY_U,
  50. [23] = KEY_I,
  51. [24] = KEY_O,
  52. [25] = KEY_P,
  53. [26] = KEY_LEFTBRACE,
  54. [27] = KEY_RIGHTBRACE,
  55. [29] = KEY_KP1,
  56. [30] = KEY_KP2,
  57. [31] = KEY_KP3,
  58. [32] = KEY_A,
  59. [33] = KEY_S,
  60. [34] = KEY_D,
  61. [35] = KEY_F,
  62. [36] = KEY_G,
  63. [37] = KEY_H,
  64. [38] = KEY_J,
  65. [39] = KEY_K,
  66. [40] = KEY_L,
  67. [41] = KEY_SEMICOLON,
  68. [42] = KEY_APOSTROPHE,
  69. [43] = KEY_BACKSLASH,
  70. [45] = KEY_KP4,
  71. [46] = KEY_KP5,
  72. [47] = KEY_KP6,
  73. [48] = KEY_102ND,
  74. [49] = KEY_Z,
  75. [50] = KEY_X,
  76. [51] = KEY_C,
  77. [52] = KEY_V,
  78. [53] = KEY_B,
  79. [54] = KEY_N,
  80. [55] = KEY_M,
  81. [56] = KEY_COMMA,
  82. [57] = KEY_DOT,
  83. [58] = KEY_SLASH,
  84. [60] = KEY_KPDOT,
  85. [61] = KEY_KP7,
  86. [62] = KEY_KP8,
  87. [63] = KEY_KP9,
  88. [64] = KEY_SPACE,
  89. [65] = KEY_BACKSPACE,
  90. [66] = KEY_TAB,
  91. [67] = KEY_KPENTER,
  92. [68] = KEY_ENTER,
  93. [69] = KEY_ESC,
  94. [70] = KEY_DELETE,
  95. [74] = KEY_KPMINUS,
  96. [76] = KEY_UP,
  97. [77] = KEY_DOWN,
  98. [78] = KEY_RIGHT,
  99. [79] = KEY_LEFT,
  100. [80] = KEY_F1,
  101. [81] = KEY_F2,
  102. [82] = KEY_F3,
  103. [83] = KEY_F4,
  104. [84] = KEY_F5,
  105. [85] = KEY_F6,
  106. [86] = KEY_F7,
  107. [87] = KEY_F8,
  108. [88] = KEY_F9,
  109. [89] = KEY_F10,
  110. [90] = KEY_KPLEFTPAREN,
  111. [91] = KEY_KPRIGHTPAREN,
  112. [92] = KEY_KPSLASH,
  113. [93] = KEY_KPASTERISK,
  114. [94] = KEY_KPPLUS,
  115. [95] = KEY_HELP,
  116. [96] = KEY_LEFTSHIFT,
  117. [97] = KEY_RIGHTSHIFT,
  118. [98] = KEY_CAPSLOCK,
  119. [99] = KEY_LEFTCTRL,
  120. [100] = KEY_LEFTALT,
  121. [101] = KEY_RIGHTALT,
  122. [102] = KEY_LEFTMETA,
  123. [103] = KEY_RIGHTMETA
  124. };
  125. static void __init amikbd_init_console_keymaps(void)
  126. {
  127. /* We can spare 512 bytes on stack for temp_map in init path. */
  128. unsigned short temp_map[NR_KEYS];
  129. int i, j;
  130. for (i = 0; i < MAX_NR_KEYMAPS; i++) {
  131. if (!key_maps[i])
  132. continue;
  133. memset(temp_map, 0, sizeof(temp_map));
  134. for (j = 0; j < 0x78; j++) {
  135. if (!amikbd_keycode[j])
  136. continue;
  137. temp_map[j] = key_maps[i][amikbd_keycode[j]];
  138. }
  139. for (j = 0; j < NR_KEYS; j++) {
  140. if (!temp_map[j])
  141. temp_map[j] = 0xf200;
  142. }
  143. memcpy(key_maps[i], temp_map, sizeof(temp_map));
  144. }
  145. }
  146. #else /* !CONFIG_HW_CONSOLE */
  147. static inline void amikbd_init_console_keymaps(void) {}
  148. #endif /* !CONFIG_HW_CONSOLE */
  149. static const char *amikbd_messages[8] = {
  150. [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
  151. [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
  152. [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
  153. [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
  154. [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
  155. [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
  156. [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
  157. [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
  158. };
  159. static irqreturn_t amikbd_interrupt(int irq, void *data)
  160. {
  161. struct input_dev *dev = data;
  162. unsigned char scancode, down;
  163. scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */
  164. ciaa.cra |= 0x40; /* switch SP pin to output for handshake */
  165. udelay(85); /* wait until 85 us have expired */
  166. ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */
  167. down = !(scancode & 1); /* lowest bit is release bit */
  168. scancode >>= 1;
  169. if (scancode < 0x78) { /* scancodes < 0x78 are keys */
  170. if (scancode == 98) { /* CapsLock is a toggle switch key on Amiga */
  171. input_report_key(dev, scancode, 1);
  172. input_report_key(dev, scancode, 0);
  173. } else {
  174. input_report_key(dev, scancode, down);
  175. }
  176. input_sync(dev);
  177. } else /* scancodes >= 0x78 are error codes */
  178. printk(amikbd_messages[scancode - 0x78]);
  179. return IRQ_HANDLED;
  180. }
  181. static int __init amikbd_probe(struct platform_device *pdev)
  182. {
  183. struct input_dev *dev;
  184. int i, err;
  185. dev = input_allocate_device();
  186. if (!dev) {
  187. dev_err(&pdev->dev, "Not enough memory for input device\n");
  188. return -ENOMEM;
  189. }
  190. dev->name = pdev->name;
  191. dev->phys = "amikbd/input0";
  192. dev->id.bustype = BUS_AMIGA;
  193. dev->id.vendor = 0x0001;
  194. dev->id.product = 0x0001;
  195. dev->id.version = 0x0100;
  196. dev->dev.parent = &pdev->dev;
  197. dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
  198. for (i = 0; i < 0x78; i++)
  199. set_bit(i, dev->keybit);
  200. amikbd_init_console_keymaps();
  201. ciaa.cra &= ~0x41; /* serial data in, turn off TA */
  202. err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
  203. dev);
  204. if (err)
  205. goto fail2;
  206. err = input_register_device(dev);
  207. if (err)
  208. goto fail3;
  209. platform_set_drvdata(pdev, dev);
  210. return 0;
  211. fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
  212. fail2: input_free_device(dev);
  213. return err;
  214. }
  215. static int __exit amikbd_remove(struct platform_device *pdev)
  216. {
  217. struct input_dev *dev = platform_get_drvdata(pdev);
  218. free_irq(IRQ_AMIGA_CIAA_SP, dev);
  219. input_unregister_device(dev);
  220. return 0;
  221. }
  222. static struct platform_driver amikbd_driver = {
  223. .remove = __exit_p(amikbd_remove),
  224. .driver = {
  225. .name = "amiga-keyboard",
  226. },
  227. };
  228. module_platform_driver_probe(amikbd_driver, amikbd_probe);
  229. MODULE_ALIAS("platform:amiga-keyboard");