lkkbd.c 19 KB

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  1. /*
  2. * Copyright (C) 2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
  3. */
  4. /*
  5. * LK keyboard driver for Linux, based on sunkbd.c (C) by Vojtech Pavlik
  6. */
  7. /*
  8. * DEC LK201 and LK401 keyboard driver for Linux (primary for DECstations
  9. * and VAXstations, but can also be used on any standard RS232 with an
  10. * adaptor).
  11. *
  12. * DISCLAIMER: This works for _me_. If you break anything by using the
  13. * information given below, I will _not_ be liable!
  14. *
  15. * RJ10 pinout: To DE9: Or DB25:
  16. * 1 - RxD <----> Pin 3 (TxD) <-> Pin 2 (TxD)
  17. * 2 - GND <----> Pin 5 (GND) <-> Pin 7 (GND)
  18. * 4 - TxD <----> Pin 2 (RxD) <-> Pin 3 (RxD)
  19. * 3 - +12V (from HDD drive connector), DON'T connect to DE9 or DB25!!!
  20. *
  21. * Pin numbers for DE9 and DB25 are noted on the plug (quite small:). For
  22. * RJ10, it's like this:
  23. *
  24. * __=__ Hold the plug in front of you, cable downwards,
  25. * /___/| nose is hidden behind the plug. Now, pin 1 is at
  26. * |1234|| the left side, pin 4 at the right and 2 and 3 are
  27. * |IIII|| in between, of course:)
  28. * | ||
  29. * |____|/
  30. * || So the adaptor consists of three connected cables
  31. * || for data transmission (RxD and TxD) and signal ground.
  32. * Additionally, you have to get +12V from somewhere.
  33. * Most easily, you'll get that from a floppy or HDD power connector.
  34. * It's the yellow cable there (black is ground and red is +5V).
  35. *
  36. * The keyboard and all the commands it understands are documented in
  37. * "VCB02 Video Subsystem - Technical Manual", EK-104AA-TM-001. This
  38. * document is LK201 specific, but LK401 is mostly compatible. It comes
  39. * up in LK201 mode and doesn't report any of the additional keys it
  40. * has. These need to be switched on with the LK_CMD_ENABLE_LK401
  41. * command. You'll find this document (scanned .pdf file) on MANX,
  42. * a search engine specific to DEC documentation. Try
  43. * http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1
  44. */
  45. /*
  46. * This program is free software; you can redistribute it and/or modify
  47. * it under the terms of the GNU General Public License as published by
  48. * the Free Software Foundation; either version 2 of the License, or
  49. * (at your option) any later version.
  50. *
  51. * This program is distributed in the hope that it will be useful,
  52. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  53. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  54. * GNU General Public License for more details.
  55. *
  56. * You should have received a copy of the GNU General Public License
  57. * along with this program; if not, write to the Free Software
  58. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  59. */
  60. #include <linux/delay.h>
  61. #include <linux/slab.h>
  62. #include <linux/module.h>
  63. #include <linux/moduleparam.h>
  64. #include <linux/interrupt.h>
  65. #include <linux/init.h>
  66. #include <linux/input.h>
  67. #include <linux/serio.h>
  68. #include <linux/workqueue.h>
  69. #define DRIVER_DESC "LK keyboard driver"
  70. MODULE_AUTHOR ("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
  71. MODULE_DESCRIPTION (DRIVER_DESC);
  72. MODULE_LICENSE ("GPL");
  73. /*
  74. * Known parameters:
  75. * bell_volume
  76. * keyclick_volume
  77. * ctrlclick_volume
  78. *
  79. * Please notice that there's not yet an API to set these at runtime.
  80. */
  81. static int bell_volume = 100; /* % */
  82. module_param (bell_volume, int, 0);
  83. MODULE_PARM_DESC (bell_volume, "Bell volume (in %). default is 100%");
  84. static int keyclick_volume = 100; /* % */
  85. module_param (keyclick_volume, int, 0);
  86. MODULE_PARM_DESC (keyclick_volume, "Keyclick volume (in %), default is 100%");
  87. static int ctrlclick_volume = 100; /* % */
  88. module_param (ctrlclick_volume, int, 0);
  89. MODULE_PARM_DESC (ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");
  90. static int lk201_compose_is_alt;
  91. module_param (lk201_compose_is_alt, int, 0);
  92. MODULE_PARM_DESC (lk201_compose_is_alt, "If set non-zero, LK201' Compose key "
  93. "will act as an Alt key");
  94. #undef LKKBD_DEBUG
  95. #ifdef LKKBD_DEBUG
  96. #define DBG(x...) printk (x)
  97. #else
  98. #define DBG(x...) do {} while (0)
  99. #endif
  100. /* LED control */
  101. #define LK_LED_WAIT 0x81
  102. #define LK_LED_COMPOSE 0x82
  103. #define LK_LED_SHIFTLOCK 0x84
  104. #define LK_LED_SCROLLLOCK 0x88
  105. #define LK_CMD_LED_ON 0x13
  106. #define LK_CMD_LED_OFF 0x11
  107. /* Mode control */
  108. #define LK_MODE_DOWN 0x80
  109. #define LK_MODE_AUTODOWN 0x82
  110. #define LK_MODE_UPDOWN 0x86
  111. #define LK_CMD_SET_MODE(mode,div) ((mode) | ((div) << 3))
  112. /* Misc commands */
  113. #define LK_CMD_ENABLE_KEYCLICK 0x1b
  114. #define LK_CMD_DISABLE_KEYCLICK 0x99
  115. #define LK_CMD_DISABLE_BELL 0xa1
  116. #define LK_CMD_SOUND_BELL 0xa7
  117. #define LK_CMD_ENABLE_BELL 0x23
  118. #define LK_CMD_DISABLE_CTRCLICK 0xb9
  119. #define LK_CMD_ENABLE_CTRCLICK 0xbb
  120. #define LK_CMD_SET_DEFAULTS 0xd3
  121. #define LK_CMD_POWERCYCLE_RESET 0xfd
  122. #define LK_CMD_ENABLE_LK401 0xe9
  123. #define LK_CMD_REQUEST_ID 0xab
  124. /* Misc responses from keyboard */
  125. #define LK_STUCK_KEY 0x3d
  126. #define LK_SELFTEST_FAILED 0x3e
  127. #define LK_ALL_KEYS_UP 0xb3
  128. #define LK_METRONOME 0xb4
  129. #define LK_OUTPUT_ERROR 0xb5
  130. #define LK_INPUT_ERROR 0xb6
  131. #define LK_KBD_LOCKED 0xb7
  132. #define LK_KBD_TEST_MODE_ACK 0xb8
  133. #define LK_PREFIX_KEY_DOWN 0xb9
  134. #define LK_MODE_CHANGE_ACK 0xba
  135. #define LK_RESPONSE_RESERVED 0xbb
  136. #define LK_NUM_KEYCODES 256
  137. #define LK_NUM_IGNORE_BYTES 6
  138. typedef u_int16_t lk_keycode_t;
  139. static lk_keycode_t lkkbd_keycode[LK_NUM_KEYCODES] = {
  140. [0x56] = KEY_F1,
  141. [0x57] = KEY_F2,
  142. [0x58] = KEY_F3,
  143. [0x59] = KEY_F4,
  144. [0x5a] = KEY_F5,
  145. [0x64] = KEY_F6,
  146. [0x65] = KEY_F7,
  147. [0x66] = KEY_F8,
  148. [0x67] = KEY_F9,
  149. [0x68] = KEY_F10,
  150. [0x71] = KEY_F11,
  151. [0x72] = KEY_F12,
  152. [0x73] = KEY_F13,
  153. [0x74] = KEY_F14,
  154. [0x7c] = KEY_F15,
  155. [0x7d] = KEY_F16,
  156. [0x80] = KEY_F17,
  157. [0x81] = KEY_F18,
  158. [0x82] = KEY_F19,
  159. [0x83] = KEY_F20,
  160. [0x8a] = KEY_FIND,
  161. [0x8b] = KEY_INSERT,
  162. [0x8c] = KEY_DELETE,
  163. [0x8d] = KEY_SELECT,
  164. [0x8e] = KEY_PAGEUP,
  165. [0x8f] = KEY_PAGEDOWN,
  166. [0x92] = KEY_KP0,
  167. [0x94] = KEY_KPDOT,
  168. [0x95] = KEY_KPENTER,
  169. [0x96] = KEY_KP1,
  170. [0x97] = KEY_KP2,
  171. [0x98] = KEY_KP3,
  172. [0x99] = KEY_KP4,
  173. [0x9a] = KEY_KP5,
  174. [0x9b] = KEY_KP6,
  175. [0x9c] = KEY_KPCOMMA,
  176. [0x9d] = KEY_KP7,
  177. [0x9e] = KEY_KP8,
  178. [0x9f] = KEY_KP9,
  179. [0xa0] = KEY_KPMINUS,
  180. [0xa1] = KEY_PROG1,
  181. [0xa2] = KEY_PROG2,
  182. [0xa3] = KEY_PROG3,
  183. [0xa4] = KEY_PROG4,
  184. [0xa7] = KEY_LEFT,
  185. [0xa8] = KEY_RIGHT,
  186. [0xa9] = KEY_DOWN,
  187. [0xaa] = KEY_UP,
  188. [0xab] = KEY_RIGHTSHIFT,
  189. [0xac] = KEY_LEFTALT,
  190. [0xad] = KEY_COMPOSE, /* Right Compose, that is. */
  191. [0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */
  192. [0xaf] = KEY_LEFTCTRL,
  193. [0xb0] = KEY_CAPSLOCK,
  194. [0xb1] = KEY_COMPOSE, /* Left Compose, that is. */
  195. [0xb2] = KEY_RIGHTALT,
  196. [0xbc] = KEY_BACKSPACE,
  197. [0xbd] = KEY_ENTER,
  198. [0xbe] = KEY_TAB,
  199. [0xbf] = KEY_ESC,
  200. [0xc0] = KEY_1,
  201. [0xc1] = KEY_Q,
  202. [0xc2] = KEY_A,
  203. [0xc3] = KEY_Z,
  204. [0xc5] = KEY_2,
  205. [0xc6] = KEY_W,
  206. [0xc7] = KEY_S,
  207. [0xc8] = KEY_X,
  208. [0xc9] = KEY_102ND,
  209. [0xcb] = KEY_3,
  210. [0xcc] = KEY_E,
  211. [0xcd] = KEY_D,
  212. [0xce] = KEY_C,
  213. [0xd0] = KEY_4,
  214. [0xd1] = KEY_R,
  215. [0xd2] = KEY_F,
  216. [0xd3] = KEY_V,
  217. [0xd4] = KEY_SPACE,
  218. [0xd6] = KEY_5,
  219. [0xd7] = KEY_T,
  220. [0xd8] = KEY_G,
  221. [0xd9] = KEY_B,
  222. [0xdb] = KEY_6,
  223. [0xdc] = KEY_Y,
  224. [0xdd] = KEY_H,
  225. [0xde] = KEY_N,
  226. [0xe0] = KEY_7,
  227. [0xe1] = KEY_U,
  228. [0xe2] = KEY_J,
  229. [0xe3] = KEY_M,
  230. [0xe5] = KEY_8,
  231. [0xe6] = KEY_I,
  232. [0xe7] = KEY_K,
  233. [0xe8] = KEY_COMMA,
  234. [0xea] = KEY_9,
  235. [0xeb] = KEY_O,
  236. [0xec] = KEY_L,
  237. [0xed] = KEY_DOT,
  238. [0xef] = KEY_0,
  239. [0xf0] = KEY_P,
  240. [0xf2] = KEY_SEMICOLON,
  241. [0xf3] = KEY_SLASH,
  242. [0xf5] = KEY_EQUAL,
  243. [0xf6] = KEY_RIGHTBRACE,
  244. [0xf7] = KEY_BACKSLASH,
  245. [0xf9] = KEY_MINUS,
  246. [0xfa] = KEY_LEFTBRACE,
  247. [0xfb] = KEY_APOSTROPHE,
  248. };
  249. #define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do { \
  250. if (test_bit (LED, (LK)->dev->led)) \
  251. VAR_ON |= BITS; \
  252. else \
  253. VAR_OFF |= BITS; \
  254. } while (0)
  255. /*
  256. * Per-keyboard data
  257. */
  258. struct lkkbd {
  259. lk_keycode_t keycode[LK_NUM_KEYCODES];
  260. int ignore_bytes;
  261. unsigned char id[LK_NUM_IGNORE_BYTES];
  262. struct input_dev *dev;
  263. struct serio *serio;
  264. struct work_struct tq;
  265. char name[64];
  266. char phys[32];
  267. char type;
  268. int bell_volume;
  269. int keyclick_volume;
  270. int ctrlclick_volume;
  271. };
  272. #ifdef LKKBD_DEBUG
  273. /*
  274. * Responses from the keyboard and mapping back to their names.
  275. */
  276. static struct {
  277. unsigned char value;
  278. unsigned char *name;
  279. } lk_response[] = {
  280. #define RESPONSE(x) { .value = (x), .name = #x, }
  281. RESPONSE (LK_STUCK_KEY),
  282. RESPONSE (LK_SELFTEST_FAILED),
  283. RESPONSE (LK_ALL_KEYS_UP),
  284. RESPONSE (LK_METRONOME),
  285. RESPONSE (LK_OUTPUT_ERROR),
  286. RESPONSE (LK_INPUT_ERROR),
  287. RESPONSE (LK_KBD_LOCKED),
  288. RESPONSE (LK_KBD_TEST_MODE_ACK),
  289. RESPONSE (LK_PREFIX_KEY_DOWN),
  290. RESPONSE (LK_MODE_CHANGE_ACK),
  291. RESPONSE (LK_RESPONSE_RESERVED),
  292. #undef RESPONSE
  293. };
  294. static unsigned char *
  295. response_name (unsigned char value)
  296. {
  297. int i;
  298. for (i = 0; i < ARRAY_SIZE (lk_response); i++)
  299. if (lk_response[i].value == value)
  300. return lk_response[i].name;
  301. return "<unknown>";
  302. }
  303. #endif /* LKKBD_DEBUG */
  304. /*
  305. * Calculate volume parameter byte for a given volume.
  306. */
  307. static unsigned char
  308. volume_to_hw (int volume_percent)
  309. {
  310. unsigned char ret = 0;
  311. if (volume_percent < 0)
  312. volume_percent = 0;
  313. if (volume_percent > 100)
  314. volume_percent = 100;
  315. if (volume_percent >= 0)
  316. ret = 7;
  317. if (volume_percent >= 13) /* 12.5 */
  318. ret = 6;
  319. if (volume_percent >= 25)
  320. ret = 5;
  321. if (volume_percent >= 38) /* 37.5 */
  322. ret = 4;
  323. if (volume_percent >= 50)
  324. ret = 3;
  325. if (volume_percent >= 63) /* 62.5 */
  326. ret = 2; /* This is the default volume */
  327. if (volume_percent >= 75)
  328. ret = 1;
  329. if (volume_percent >= 88) /* 87.5 */
  330. ret = 0;
  331. ret |= 0x80;
  332. return ret;
  333. }
  334. static void
  335. lkkbd_detection_done (struct lkkbd *lk)
  336. {
  337. int i;
  338. /*
  339. * Reset setting for Compose key. Let Compose be KEY_COMPOSE.
  340. */
  341. lk->keycode[0xb1] = KEY_COMPOSE;
  342. /*
  343. * Print keyboard name and modify Compose=Alt on user's request.
  344. */
  345. switch (lk->id[4]) {
  346. case 1:
  347. strlcpy (lk->name, "DEC LK201 keyboard",
  348. sizeof (lk->name));
  349. if (lk201_compose_is_alt)
  350. lk->keycode[0xb1] = KEY_LEFTALT;
  351. break;
  352. case 2:
  353. strlcpy (lk->name, "DEC LK401 keyboard",
  354. sizeof (lk->name));
  355. break;
  356. default:
  357. strlcpy (lk->name, "Unknown DEC keyboard",
  358. sizeof (lk->name));
  359. printk (KERN_ERR "lkkbd: keyboard on %s is unknown, "
  360. "please report to Jan-Benedict Glaw "
  361. "<jbglaw@lug-owl.de>\n", lk->phys);
  362. printk (KERN_ERR "lkkbd: keyboard ID'ed as:");
  363. for (i = 0; i < LK_NUM_IGNORE_BYTES; i++)
  364. printk (" 0x%02x", lk->id[i]);
  365. printk ("\n");
  366. break;
  367. }
  368. printk (KERN_INFO "lkkbd: keyboard on %s identified as: %s\n",
  369. lk->phys, lk->name);
  370. /*
  371. * Report errors during keyboard boot-up.
  372. */
  373. switch (lk->id[2]) {
  374. case 0x00:
  375. /* All okay */
  376. break;
  377. case LK_STUCK_KEY:
  378. printk (KERN_ERR "lkkbd: Stuck key on keyboard at "
  379. "%s\n", lk->phys);
  380. break;
  381. case LK_SELFTEST_FAILED:
  382. printk (KERN_ERR "lkkbd: Selftest failed on keyboard "
  383. "at %s, keyboard may not work "
  384. "properly\n", lk->phys);
  385. break;
  386. default:
  387. printk (KERN_ERR "lkkbd: Unknown error %02x on "
  388. "keyboard at %s\n", lk->id[2],
  389. lk->phys);
  390. break;
  391. }
  392. /*
  393. * Try to hint user if there's a stuck key.
  394. */
  395. if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0)
  396. printk (KERN_ERR "Scancode of stuck key is 0x%02x, keycode "
  397. "is 0x%04x\n", lk->id[3],
  398. lk->keycode[lk->id[3]]);
  399. return;
  400. }
  401. /*
  402. * lkkbd_interrupt() is called by the low level driver when a character
  403. * is received.
  404. */
  405. static irqreturn_t
  406. lkkbd_interrupt (struct serio *serio, unsigned char data, unsigned int flags)
  407. {
  408. struct lkkbd *lk = serio_get_drvdata (serio);
  409. int i;
  410. DBG (KERN_INFO "Got byte 0x%02x\n", data);
  411. if (lk->ignore_bytes > 0) {
  412. DBG (KERN_INFO "Ignoring a byte on %s\n", lk->name);
  413. lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
  414. if (lk->ignore_bytes == 0)
  415. lkkbd_detection_done (lk);
  416. return IRQ_HANDLED;
  417. }
  418. switch (data) {
  419. case LK_ALL_KEYS_UP:
  420. for (i = 0; i < ARRAY_SIZE (lkkbd_keycode); i++)
  421. if (lk->keycode[i] != KEY_RESERVED)
  422. input_report_key (lk->dev, lk->keycode[i], 0);
  423. input_sync (lk->dev);
  424. break;
  425. case 0x01:
  426. DBG (KERN_INFO "Got 0x01, scheduling re-initialization\n");
  427. lk->ignore_bytes = LK_NUM_IGNORE_BYTES;
  428. lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
  429. schedule_work (&lk->tq);
  430. break;
  431. case LK_METRONOME:
  432. case LK_OUTPUT_ERROR:
  433. case LK_INPUT_ERROR:
  434. case LK_KBD_LOCKED:
  435. case LK_KBD_TEST_MODE_ACK:
  436. case LK_PREFIX_KEY_DOWN:
  437. case LK_MODE_CHANGE_ACK:
  438. case LK_RESPONSE_RESERVED:
  439. DBG (KERN_INFO "Got %s and don't know how to handle...\n",
  440. response_name (data));
  441. break;
  442. default:
  443. if (lk->keycode[data] != KEY_RESERVED) {
  444. if (!test_bit (lk->keycode[data], lk->dev->key))
  445. input_report_key (lk->dev, lk->keycode[data], 1);
  446. else
  447. input_report_key (lk->dev, lk->keycode[data], 0);
  448. input_sync (lk->dev);
  449. } else
  450. printk (KERN_WARNING "%s: Unknown key with "
  451. "scancode 0x%02x on %s.\n",
  452. __FILE__, data, lk->name);
  453. }
  454. return IRQ_HANDLED;
  455. }
  456. /*
  457. * lkkbd_event() handles events from the input module.
  458. */
  459. static int
  460. lkkbd_event (struct input_dev *dev, unsigned int type, unsigned int code,
  461. int value)
  462. {
  463. struct lkkbd *lk = dev->private;
  464. unsigned char leds_on = 0;
  465. unsigned char leds_off = 0;
  466. switch (type) {
  467. case EV_LED:
  468. CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
  469. CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
  470. CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
  471. CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
  472. if (leds_on != 0) {
  473. lk->serio->write (lk->serio, LK_CMD_LED_ON);
  474. lk->serio->write (lk->serio, leds_on);
  475. }
  476. if (leds_off != 0) {
  477. lk->serio->write (lk->serio, LK_CMD_LED_OFF);
  478. lk->serio->write (lk->serio, leds_off);
  479. }
  480. return 0;
  481. case EV_SND:
  482. switch (code) {
  483. case SND_CLICK:
  484. if (value == 0) {
  485. DBG ("%s: Deactivating key clicks\n", __FUNCTION__);
  486. lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
  487. lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
  488. } else {
  489. DBG ("%s: Activating key clicks\n", __FUNCTION__);
  490. lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
  491. lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
  492. lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
  493. lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
  494. }
  495. return 0;
  496. case SND_BELL:
  497. if (value != 0)
  498. lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
  499. return 0;
  500. }
  501. break;
  502. default:
  503. printk (KERN_ERR "%s (): Got unknown type %d, code %d, value %d\n",
  504. __FUNCTION__, type, code, value);
  505. }
  506. return -1;
  507. }
  508. /*
  509. * lkkbd_reinit() sets leds and beeps to a state the computer remembers they
  510. * were in.
  511. */
  512. static void
  513. lkkbd_reinit (struct work_struct *work)
  514. {
  515. struct lkkbd *lk = container_of(work, struct lkkbd, tq);
  516. int division;
  517. unsigned char leds_on = 0;
  518. unsigned char leds_off = 0;
  519. /* Ask for ID */
  520. lk->serio->write (lk->serio, LK_CMD_REQUEST_ID);
  521. /* Reset parameters */
  522. lk->serio->write (lk->serio, LK_CMD_SET_DEFAULTS);
  523. /* Set LEDs */
  524. CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
  525. CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
  526. CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
  527. CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
  528. if (leds_on != 0) {
  529. lk->serio->write (lk->serio, LK_CMD_LED_ON);
  530. lk->serio->write (lk->serio, leds_on);
  531. }
  532. if (leds_off != 0) {
  533. lk->serio->write (lk->serio, LK_CMD_LED_OFF);
  534. lk->serio->write (lk->serio, leds_off);
  535. }
  536. /*
  537. * Try to activate extended LK401 mode. This command will
  538. * only work with a LK401 keyboard and grants access to
  539. * LAlt, RAlt, RCompose and RShift.
  540. */
  541. lk->serio->write (lk->serio, LK_CMD_ENABLE_LK401);
  542. /* Set all keys to UPDOWN mode */
  543. for (division = 1; division <= 14; division++)
  544. lk->serio->write (lk->serio, LK_CMD_SET_MODE (LK_MODE_UPDOWN,
  545. division));
  546. /* Enable bell and set volume */
  547. lk->serio->write (lk->serio, LK_CMD_ENABLE_BELL);
  548. lk->serio->write (lk->serio, volume_to_hw (lk->bell_volume));
  549. /* Enable/disable keyclick (and possibly set volume) */
  550. if (test_bit (SND_CLICK, lk->dev->snd)) {
  551. lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
  552. lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
  553. lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
  554. lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
  555. } else {
  556. lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
  557. lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
  558. }
  559. /* Sound the bell if needed */
  560. if (test_bit (SND_BELL, lk->dev->snd))
  561. lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
  562. }
  563. /*
  564. * lkkbd_connect() probes for a LK keyboard and fills the necessary structures.
  565. */
  566. static int
  567. lkkbd_connect (struct serio *serio, struct serio_driver *drv)
  568. {
  569. struct lkkbd *lk;
  570. struct input_dev *input_dev;
  571. int i;
  572. int err;
  573. lk = kzalloc (sizeof (struct lkkbd), GFP_KERNEL);
  574. input_dev = input_allocate_device ();
  575. if (!lk || !input_dev) {
  576. err = -ENOMEM;
  577. goto fail1;
  578. }
  579. lk->serio = serio;
  580. lk->dev = input_dev;
  581. INIT_WORK (&lk->tq, lkkbd_reinit);
  582. lk->bell_volume = bell_volume;
  583. lk->keyclick_volume = keyclick_volume;
  584. lk->ctrlclick_volume = ctrlclick_volume;
  585. memcpy (lk->keycode, lkkbd_keycode, sizeof (lk_keycode_t) * LK_NUM_KEYCODES);
  586. strlcpy (lk->name, "DEC LK keyboard", sizeof(lk->name));
  587. snprintf (lk->phys, sizeof(lk->phys), "%s/input0", serio->phys);
  588. input_dev->name = lk->name;
  589. input_dev->phys = lk->phys;
  590. input_dev->id.bustype = BUS_RS232;
  591. input_dev->id.vendor = SERIO_LKKBD;
  592. input_dev->id.product = 0;
  593. input_dev->id.version = 0x0100;
  594. input_dev->cdev.dev = &serio->dev;
  595. input_dev->event = lkkbd_event;
  596. input_dev->private = lk;
  597. set_bit (EV_KEY, input_dev->evbit);
  598. set_bit (EV_LED, input_dev->evbit);
  599. set_bit (EV_SND, input_dev->evbit);
  600. set_bit (EV_REP, input_dev->evbit);
  601. set_bit (LED_CAPSL, input_dev->ledbit);
  602. set_bit (LED_SLEEP, input_dev->ledbit);
  603. set_bit (LED_COMPOSE, input_dev->ledbit);
  604. set_bit (LED_SCROLLL, input_dev->ledbit);
  605. set_bit (SND_BELL, input_dev->sndbit);
  606. set_bit (SND_CLICK, input_dev->sndbit);
  607. input_dev->keycode = lk->keycode;
  608. input_dev->keycodesize = sizeof (lk_keycode_t);
  609. input_dev->keycodemax = LK_NUM_KEYCODES;
  610. for (i = 0; i < LK_NUM_KEYCODES; i++)
  611. set_bit (lk->keycode[i], input_dev->keybit);
  612. serio_set_drvdata (serio, lk);
  613. err = serio_open (serio, drv);
  614. if (err)
  615. goto fail2;
  616. err = input_register_device (lk->dev);
  617. if (err)
  618. goto fail3;
  619. lk->serio->write (lk->serio, LK_CMD_POWERCYCLE_RESET);
  620. return 0;
  621. fail3: serio_close (serio);
  622. fail2: serio_set_drvdata (serio, NULL);
  623. fail1: input_free_device (input_dev);
  624. kfree (lk);
  625. return err;
  626. }
  627. /*
  628. * lkkbd_disconnect() unregisters and closes behind us.
  629. */
  630. static void
  631. lkkbd_disconnect (struct serio *serio)
  632. {
  633. struct lkkbd *lk = serio_get_drvdata (serio);
  634. input_get_device (lk->dev);
  635. input_unregister_device (lk->dev);
  636. serio_close (serio);
  637. serio_set_drvdata (serio, NULL);
  638. input_put_device (lk->dev);
  639. kfree (lk);
  640. }
  641. static struct serio_device_id lkkbd_serio_ids[] = {
  642. {
  643. .type = SERIO_RS232,
  644. .proto = SERIO_LKKBD,
  645. .id = SERIO_ANY,
  646. .extra = SERIO_ANY,
  647. },
  648. { 0 }
  649. };
  650. MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids);
  651. static struct serio_driver lkkbd_drv = {
  652. .driver = {
  653. .name = "lkkbd",
  654. },
  655. .description = DRIVER_DESC,
  656. .id_table = lkkbd_serio_ids,
  657. .connect = lkkbd_connect,
  658. .disconnect = lkkbd_disconnect,
  659. .interrupt = lkkbd_interrupt,
  660. };
  661. /*
  662. * The functions for insering/removing us as a module.
  663. */
  664. static int __init
  665. lkkbd_init (void)
  666. {
  667. return serio_register_driver(&lkkbd_drv);
  668. }
  669. static void __exit
  670. lkkbd_exit (void)
  671. {
  672. serio_unregister_driver(&lkkbd_drv);
  673. }
  674. module_init (lkkbd_init);
  675. module_exit (lkkbd_exit);