gf2k.c 8.6 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * Copyright (c) 1998-2001 Vojtech Pavlik
  4. */
  5. /*
  6. * Genius Flight 2000 joystick driver for Linux
  7. */
  8. /*
  9. */
  10. #include <linux/delay.h>
  11. #include <linux/kernel.h>
  12. #include <linux/slab.h>
  13. #include <linux/module.h>
  14. #include <linux/input.h>
  15. #include <linux/gameport.h>
  16. #include <linux/jiffies.h>
  17. #define DRIVER_DESC "Genius Flight 2000 joystick driver"
  18. MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  19. MODULE_DESCRIPTION(DRIVER_DESC);
  20. MODULE_LICENSE("GPL");
  21. #define GF2K_START 400 /* The time we wait for the first bit [400 us] */
  22. #define GF2K_STROBE 40 /* The time we wait for the first bit [40 us] */
  23. #define GF2K_TIMEOUT 4 /* Wait for everything to settle [4 ms] */
  24. #define GF2K_LENGTH 80 /* Max number of triplets in a packet */
  25. /*
  26. * Genius joystick ids ...
  27. */
  28. #define GF2K_ID_G09 1
  29. #define GF2K_ID_F30D 2
  30. #define GF2K_ID_F30 3
  31. #define GF2K_ID_F31D 4
  32. #define GF2K_ID_F305 5
  33. #define GF2K_ID_F23P 6
  34. #define GF2K_ID_F31 7
  35. #define GF2K_ID_MAX 7
  36. static char gf2k_length[] = { 40, 40, 40, 40, 40, 40, 40, 40 };
  37. static char gf2k_hat_to_axis[][2] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  38. static char *gf2k_names[] = {"", "Genius G-09D", "Genius F-30D", "Genius F-30", "Genius MaxFighter F-31D",
  39. "Genius F-30-5", "Genius Flight2000 F-23", "Genius F-31"};
  40. static unsigned char gf2k_hats[] = { 0, 2, 0, 0, 2, 0, 2, 0 };
  41. static unsigned char gf2k_axes[] = { 0, 2, 0, 0, 4, 0, 4, 0 };
  42. static unsigned char gf2k_joys[] = { 0, 0, 0, 0,10, 0, 8, 0 };
  43. static unsigned char gf2k_pads[] = { 0, 6, 0, 0, 0, 0, 0, 0 };
  44. static unsigned char gf2k_lens[] = { 0,18, 0, 0,18, 0,18, 0 };
  45. static unsigned char gf2k_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_GAS, ABS_BRAKE };
  46. static short gf2k_btn_joy[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 };
  47. static short gf2k_btn_pad[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_START, BTN_SELECT };
  48. static short gf2k_seq_reset[] = { 240, 340, 0 };
  49. static short gf2k_seq_digital[] = { 590, 320, 860, 0 };
  50. struct gf2k {
  51. struct gameport *gameport;
  52. struct input_dev *dev;
  53. int reads;
  54. int bads;
  55. unsigned char id;
  56. unsigned char length;
  57. char phys[32];
  58. };
  59. /*
  60. * gf2k_read_packet() reads a Genius Flight2000 packet.
  61. */
  62. static int gf2k_read_packet(struct gameport *gameport, int length, char *data)
  63. {
  64. unsigned char u, v;
  65. int i;
  66. unsigned int t, p;
  67. unsigned long flags;
  68. t = gameport_time(gameport, GF2K_START);
  69. p = gameport_time(gameport, GF2K_STROBE);
  70. i = 0;
  71. local_irq_save(flags);
  72. gameport_trigger(gameport);
  73. v = gameport_read(gameport);
  74. while (t > 0 && i < length) {
  75. t--; u = v;
  76. v = gameport_read(gameport);
  77. if (v & ~u & 0x10) {
  78. data[i++] = v >> 5;
  79. t = p;
  80. }
  81. }
  82. local_irq_restore(flags);
  83. return i;
  84. }
  85. /*
  86. * gf2k_trigger_seq() initializes a Genius Flight2000 joystick
  87. * into digital mode.
  88. */
  89. static void gf2k_trigger_seq(struct gameport *gameport, short *seq)
  90. {
  91. unsigned long flags;
  92. int i, t;
  93. local_irq_save(flags);
  94. i = 0;
  95. do {
  96. gameport_trigger(gameport);
  97. t = gameport_time(gameport, GF2K_TIMEOUT * 1000);
  98. while ((gameport_read(gameport) & 1) && t) t--;
  99. udelay(seq[i]);
  100. } while (seq[++i]);
  101. gameport_trigger(gameport);
  102. local_irq_restore(flags);
  103. }
  104. /*
  105. * js_sw_get_bits() composes bits from the triplet buffer into a __u64.
  106. * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
  107. * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
  108. * is number of bits per triplet.
  109. */
  110. #define GB(p,n,s) gf2k_get_bits(data, p, n, s)
  111. static int gf2k_get_bits(unsigned char *buf, int pos, int num, int shift)
  112. {
  113. __u64 data = 0;
  114. int i;
  115. for (i = 0; i < num / 3 + 2; i++)
  116. data |= buf[pos / 3 + i] << (i * 3);
  117. data >>= pos % 3;
  118. data &= (1 << num) - 1;
  119. data <<= shift;
  120. return data;
  121. }
  122. static void gf2k_read(struct gf2k *gf2k, unsigned char *data)
  123. {
  124. struct input_dev *dev = gf2k->dev;
  125. int i, t;
  126. for (i = 0; i < 4 && i < gf2k_axes[gf2k->id]; i++)
  127. input_report_abs(dev, gf2k_abs[i], GB(i<<3,8,0) | GB(i+46,1,8) | GB(i+50,1,9));
  128. for (i = 0; i < 2 && i < gf2k_axes[gf2k->id] - 4; i++)
  129. input_report_abs(dev, gf2k_abs[i], GB(i*9+60,8,0) | GB(i+54,1,9));
  130. t = GB(40,4,0);
  131. for (i = 0; i < gf2k_hats[gf2k->id]; i++)
  132. input_report_abs(dev, ABS_HAT0X + i, gf2k_hat_to_axis[t][i]);
  133. t = GB(44,2,0) | GB(32,8,2) | GB(78,2,10);
  134. for (i = 0; i < gf2k_joys[gf2k->id]; i++)
  135. input_report_key(dev, gf2k_btn_joy[i], (t >> i) & 1);
  136. for (i = 0; i < gf2k_pads[gf2k->id]; i++)
  137. input_report_key(dev, gf2k_btn_pad[i], (t >> i) & 1);
  138. input_sync(dev);
  139. }
  140. /*
  141. * gf2k_poll() reads and analyzes Genius joystick data.
  142. */
  143. static void gf2k_poll(struct gameport *gameport)
  144. {
  145. struct gf2k *gf2k = gameport_get_drvdata(gameport);
  146. unsigned char data[GF2K_LENGTH];
  147. gf2k->reads++;
  148. if (gf2k_read_packet(gf2k->gameport, gf2k_length[gf2k->id], data) < gf2k_length[gf2k->id])
  149. gf2k->bads++;
  150. else
  151. gf2k_read(gf2k, data);
  152. }
  153. static int gf2k_open(struct input_dev *dev)
  154. {
  155. struct gf2k *gf2k = input_get_drvdata(dev);
  156. gameport_start_polling(gf2k->gameport);
  157. return 0;
  158. }
  159. static void gf2k_close(struct input_dev *dev)
  160. {
  161. struct gf2k *gf2k = input_get_drvdata(dev);
  162. gameport_stop_polling(gf2k->gameport);
  163. }
  164. /*
  165. * gf2k_connect() probes for Genius id joysticks.
  166. */
  167. static int gf2k_connect(struct gameport *gameport, struct gameport_driver *drv)
  168. {
  169. struct gf2k *gf2k;
  170. struct input_dev *input_dev;
  171. unsigned char data[GF2K_LENGTH];
  172. int i, err;
  173. gf2k = kzalloc(sizeof(struct gf2k), GFP_KERNEL);
  174. input_dev = input_allocate_device();
  175. if (!gf2k || !input_dev) {
  176. err = -ENOMEM;
  177. goto fail1;
  178. }
  179. gf2k->gameport = gameport;
  180. gf2k->dev = input_dev;
  181. gameport_set_drvdata(gameport, gf2k);
  182. err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
  183. if (err)
  184. goto fail1;
  185. gf2k_trigger_seq(gameport, gf2k_seq_reset);
  186. msleep(GF2K_TIMEOUT);
  187. gf2k_trigger_seq(gameport, gf2k_seq_digital);
  188. msleep(GF2K_TIMEOUT);
  189. if (gf2k_read_packet(gameport, GF2K_LENGTH, data) < 12) {
  190. err = -ENODEV;
  191. goto fail2;
  192. }
  193. if (!(gf2k->id = GB(7,2,0) | GB(3,3,2) | GB(0,3,5))) {
  194. err = -ENODEV;
  195. goto fail2;
  196. }
  197. #ifdef RESET_WORKS
  198. if ((gf2k->id != (GB(19,2,0) | GB(15,3,2) | GB(12,3,5))) &&
  199. (gf2k->id != (GB(31,2,0) | GB(27,3,2) | GB(24,3,5)))) {
  200. err = -ENODEV;
  201. goto fail2;
  202. }
  203. #else
  204. gf2k->id = 6;
  205. #endif
  206. if (gf2k->id > GF2K_ID_MAX || !gf2k_axes[gf2k->id]) {
  207. printk(KERN_WARNING "gf2k.c: Not yet supported joystick on %s. [id: %d type:%s]\n",
  208. gameport->phys, gf2k->id, gf2k->id > GF2K_ID_MAX ? "Unknown" : gf2k_names[gf2k->id]);
  209. err = -ENODEV;
  210. goto fail2;
  211. }
  212. gameport_set_poll_handler(gameport, gf2k_poll);
  213. gameport_set_poll_interval(gameport, 20);
  214. snprintf(gf2k->phys, sizeof(gf2k->phys), "%s/input0", gameport->phys);
  215. gf2k->length = gf2k_lens[gf2k->id];
  216. input_dev->name = gf2k_names[gf2k->id];
  217. input_dev->phys = gf2k->phys;
  218. input_dev->id.bustype = BUS_GAMEPORT;
  219. input_dev->id.vendor = GAMEPORT_ID_VENDOR_GENIUS;
  220. input_dev->id.product = gf2k->id;
  221. input_dev->id.version = 0x0100;
  222. input_dev->dev.parent = &gameport->dev;
  223. input_set_drvdata(input_dev, gf2k);
  224. input_dev->open = gf2k_open;
  225. input_dev->close = gf2k_close;
  226. input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
  227. for (i = 0; i < gf2k_axes[gf2k->id]; i++)
  228. set_bit(gf2k_abs[i], input_dev->absbit);
  229. for (i = 0; i < gf2k_hats[gf2k->id]; i++)
  230. input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
  231. for (i = 0; i < gf2k_joys[gf2k->id]; i++)
  232. set_bit(gf2k_btn_joy[i], input_dev->keybit);
  233. for (i = 0; i < gf2k_pads[gf2k->id]; i++)
  234. set_bit(gf2k_btn_pad[i], input_dev->keybit);
  235. gf2k_read_packet(gameport, gf2k->length, data);
  236. gf2k_read(gf2k, data);
  237. for (i = 0; i < gf2k_axes[gf2k->id]; i++) {
  238. int max = i < 2 ?
  239. input_abs_get_val(input_dev, gf2k_abs[i]) * 2 :
  240. input_abs_get_val(input_dev, gf2k_abs[0]) +
  241. input_abs_get_val(input_dev, gf2k_abs[1]);
  242. int flat = i < 2 ? 24 : 0;
  243. input_set_abs_params(input_dev, gf2k_abs[i],
  244. 32, max - 32, 8, flat);
  245. }
  246. err = input_register_device(gf2k->dev);
  247. if (err)
  248. goto fail2;
  249. return 0;
  250. fail2: gameport_close(gameport);
  251. fail1: gameport_set_drvdata(gameport, NULL);
  252. input_free_device(input_dev);
  253. kfree(gf2k);
  254. return err;
  255. }
  256. static void gf2k_disconnect(struct gameport *gameport)
  257. {
  258. struct gf2k *gf2k = gameport_get_drvdata(gameport);
  259. input_unregister_device(gf2k->dev);
  260. gameport_close(gameport);
  261. gameport_set_drvdata(gameport, NULL);
  262. kfree(gf2k);
  263. }
  264. static struct gameport_driver gf2k_drv = {
  265. .driver = {
  266. .name = "gf2k",
  267. },
  268. .description = DRIVER_DESC,
  269. .connect = gf2k_connect,
  270. .disconnect = gf2k_disconnect,
  271. };
  272. module_gameport_driver(gf2k_drv);