rm unused file
[picodrive.git] / platform / linux / in_evdev.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <sys/types.h>
5 #include <sys/stat.h>
6 #include <fcntl.h>
7 #include <sys/ioctl.h>
8 #include <unistd.h>
9 #include <linux/input.h>
10 #include <errno.h>
11
12 #include "../common/input.h"
13 #include "in_evdev.h"
14
15 typedef struct {
16         int fd;
17         int *kbits;
18         int abs_lzone;
19         int abs_rzone;
20         int abs_tzone;
21         int abs_bzone;
22         int abs_lastx;
23         int abs_lasty;
24 } in_evdev_t;
25
26 #ifndef KEY_CNT
27 #define KEY_CNT (KEY_MAX + 1)
28 #endif
29
30 #define KEYBITS_BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \
31         (1 << ((x) & (sizeof(keybits[0])*8-1))))
32
33 #define KEYBITS_BIT_SET(x) (keybits[(x)/sizeof(keybits[0])/8] |= \
34         (1 << ((x) & (sizeof(keybits[0])*8-1))))
35
36 #define KEYBITS_BIT_CLEAR(x) (keybits[(x)/sizeof(keybits[0])/8] &= \
37         ~(1 << ((x) & (sizeof(keybits[0])*8-1))))
38
39 static const char * const in_evdev_prefix = "evdev:";
40 static const char * const in_evdev_keys[KEY_CNT] = {
41         [0 ... KEY_MAX] = NULL,
42         [KEY_RESERVED] = "Reserved",            [KEY_ESC] = "Esc",
43         [KEY_1] = "1",                          [KEY_2] = "2",
44         [KEY_3] = "3",                          [KEY_4] = "4",
45         [KEY_5] = "5",                          [KEY_6] = "6",
46         [KEY_7] = "7",                          [KEY_8] = "8",
47         [KEY_9] = "9",                          [KEY_0] = "0",
48         [KEY_MINUS] = "Minus",                  [KEY_EQUAL] = "Equal",
49         [KEY_BACKSPACE] = "Backspace",          [KEY_TAB] = "Tab",
50         [KEY_Q] = "Q",                          [KEY_W] = "W",
51         [KEY_E] = "E",                          [KEY_R] = "R",
52         [KEY_T] = "T",                          [KEY_Y] = "Y",
53         [KEY_U] = "U",                          [KEY_I] = "I",
54         [KEY_O] = "O",                          [KEY_P] = "P",
55         [KEY_LEFTBRACE] = "LeftBrace",          [KEY_RIGHTBRACE] = "RightBrace",
56         [KEY_ENTER] = "Enter",                  [KEY_LEFTCTRL] = "LeftControl",
57         [KEY_A] = "A",                          [KEY_S] = "S",
58         [KEY_D] = "D",                          [KEY_F] = "F",
59         [KEY_G] = "G",                          [KEY_H] = "H",
60         [KEY_J] = "J",                          [KEY_K] = "K",
61         [KEY_L] = "L",                          [KEY_SEMICOLON] = "Semicolon",
62         [KEY_APOSTROPHE] = "Apostrophe",        [KEY_GRAVE] = "Grave",
63         [KEY_LEFTSHIFT] = "LeftShift",          [KEY_BACKSLASH] = "BackSlash",
64         [KEY_Z] = "Z",                          [KEY_X] = "X",
65         [KEY_C] = "C",                          [KEY_V] = "V",
66         [KEY_B] = "B",                          [KEY_N] = "N",
67         [KEY_M] = "M",                          [KEY_COMMA] = "Comma",
68         [KEY_DOT] = "Dot",                      [KEY_SLASH] = "Slash",
69         [KEY_RIGHTSHIFT] = "RightShift",        [KEY_KPASTERISK] = "KPAsterisk",
70         [KEY_LEFTALT] = "LeftAlt",              [KEY_SPACE] = "Space",
71         [KEY_CAPSLOCK] = "CapsLock",            [KEY_F1] = "F1",
72         [KEY_F2] = "F2",                        [KEY_F3] = "F3",
73         [KEY_F4] = "F4",                        [KEY_F5] = "F5",
74         [KEY_F6] = "F6",                        [KEY_F7] = "F7",
75         [KEY_F8] = "F8",                        [KEY_F9] = "F9",
76         [KEY_F10] = "F10",                      [KEY_NUMLOCK] = "NumLock",
77         [KEY_SCROLLLOCK] = "ScrollLock",        [KEY_KP7] = "KP7",
78         [KEY_KP8] = "KP8",                      [KEY_KP9] = "KP9",
79         [KEY_KPMINUS] = "KPMinus",              [KEY_KP4] = "KP4",
80         [KEY_KP5] = "KP5",                      [KEY_KP6] = "KP6",
81         [KEY_KPPLUS] = "KPPlus",                [KEY_KP1] = "KP1",
82         [KEY_KP2] = "KP2",                      [KEY_KP3] = "KP3",
83         [KEY_KP0] = "KP0",                      [KEY_KPDOT] = "KPDot",
84         [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
85         [KEY_F11] = "F11",                      [KEY_F12] = "F12",
86         [KEY_KPJPCOMMA] = "KPJpComma",          [KEY_KPENTER] = "KPEnter",
87         [KEY_RIGHTCTRL] = "RightCtrl",          [KEY_KPSLASH] = "KPSlash",
88         [KEY_SYSRQ] = "SysRq",                  [KEY_RIGHTALT] = "RightAlt",
89         [KEY_LINEFEED] = "LineFeed",            [KEY_HOME] = "Home",
90         [KEY_UP] = "Up",                        [KEY_PAGEUP] = "PageUp",
91         [KEY_LEFT] = "Left",                    [KEY_RIGHT] = "Right",
92         [KEY_END] = "End",                      [KEY_DOWN] = "Down",
93         [KEY_PAGEDOWN] = "PageDown",            [KEY_INSERT] = "Insert",
94         [KEY_DELETE] = "Delete",                [KEY_MACRO] = "Macro",
95         [KEY_HELP] = "Help",                    [KEY_MENU] = "Menu",
96         [KEY_COFFEE] = "Coffee",                [KEY_DIRECTION] = "Direction",
97         [BTN_0] = "Btn0",                       [BTN_1] = "Btn1",
98         [BTN_2] = "Btn2",                       [BTN_3] = "Btn3",
99         [BTN_4] = "Btn4",                       [BTN_5] = "Btn5",
100         [BTN_6] = "Btn6",                       [BTN_7] = "Btn7",
101         [BTN_8] = "Btn8",                       [BTN_9] = "Btn9",
102         [BTN_LEFT] = "LeftBtn",                 [BTN_RIGHT] = "RightBtn",
103         [BTN_MIDDLE] = "MiddleBtn",             [BTN_SIDE] = "SideBtn",
104         [BTN_EXTRA] = "ExtraBtn",               [BTN_FORWARD] = "ForwardBtn",
105         [BTN_BACK] = "BackBtn",                 [BTN_TASK] = "TaskBtn",
106         [BTN_TRIGGER] = "Trigger",              [BTN_THUMB] = "ThumbBtn",
107         [BTN_THUMB2] = "ThumbBtn2",             [BTN_TOP] = "TopBtn",
108         [BTN_TOP2] = "TopBtn2",                 [BTN_PINKIE] = "PinkieBtn",
109         [BTN_BASE] = "BaseBtn",                 [BTN_BASE2] = "BaseBtn2",
110         [BTN_BASE3] = "BaseBtn3",               [BTN_BASE4] = "BaseBtn4",
111         [BTN_BASE5] = "BaseBtn5",               [BTN_BASE6] = "BaseBtn6",
112         [BTN_DEAD] = "BtnDead",                 [BTN_A] = "BtnA",
113         [BTN_B] = "BtnB",                       [BTN_C] = "BtnC",
114         [BTN_X] = "BtnX",                       [BTN_Y] = "BtnY",
115         [BTN_Z] = "BtnZ",                       [BTN_TL] = "BtnTL",
116         [BTN_TR] = "BtnTR",                     [BTN_TL2] = "BtnTL2",
117         [BTN_TR2] = "BtnTR2",                   [BTN_SELECT] = "BtnSelect",
118         [BTN_START] = "BtnStart",               [BTN_MODE] = "BtnMode",
119         [BTN_THUMBL] = "BtnThumbL",             [BTN_THUMBR] = "BtnThumbR",
120         [BTN_TOUCH] = "Touch",                  [BTN_STYLUS] = "Stylus",
121         [BTN_STYLUS2] = "Stylus2",              [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
122         [BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
123         [BTN_GEAR_UP] = "Gear up",              [KEY_OK] = "Ok",
124 };
125
126
127 static void in_evdev_probe(void)
128 {
129         int i;
130
131         for (i = 0;; i++)
132         {
133                 int keybits[KEY_CNT / sizeof(int)], absbits[(ABS_MAX+1)/sizeof(int)];
134                 int support = 0, count = 0;
135                 in_evdev_t *dev;
136                 int u, ret, fd;
137                 char name[64];
138
139                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
140                 fd = open(name, O_RDONLY|O_NONBLOCK);
141                 if (fd == -1) {
142                         if (errno == EACCES)
143                                 continue;       /* maybe we can access next one */
144                         break;
145                 }
146
147                 /* check supported events */
148                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
149                 if (ret == -1) {
150                         printf("in_evdev: ioctl failed on %s\n", name);
151                         goto skip;
152                 }
153
154                 if (!(support & (1 << EV_KEY)))
155                         goto skip;
156
157                 ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
158                 if (ret == -1) {
159                         printf("in_evdev: ioctl failed on %s\n", name);
160                         goto skip;
161                 }
162
163                 /* check for interesting keys */
164                 for (u = 0; u < KEY_CNT; u++) {
165                         if (KEYBITS_BIT(u) && u != KEY_POWER &&
166                                         u != KEY_SLEEP && u != BTN_TOUCH)
167                                 count++;
168                 }
169
170                 if (count == 0)
171                         goto skip;
172
173                 dev = calloc(1, sizeof(*dev));
174                 if (dev == NULL)
175                         goto skip;
176
177                 ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
178                 if (ret == -1) {
179                         printf("Warning: EVIOCGKEY not supported, will have to track state\n");
180                         dev->kbits = calloc(KEY_CNT, sizeof(int));
181                         if (dev->kbits == NULL) {
182                                 free(dev);
183                                 goto skip;
184                         }
185                 }
186
187                 /* check for abs too */
188                 if (support & (1 << EV_ABS)) {
189                         struct input_absinfo ainfo;
190                         int dist;
191                         ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
192                         if (ret == -1)
193                                 goto no_abs;
194                         if (absbits[0] & (1 << ABS_X)) {
195                                 ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
196                                 if (ret == -1)
197                                         goto no_abs;
198                                 dist = ainfo.maximum - ainfo.minimum;
199                                 dev->abs_lzone = ainfo.minimum + dist / 4;
200                                 dev->abs_rzone = ainfo.maximum - dist / 4;
201                         }
202                         if (absbits[0] & (1 << ABS_Y)) {
203                                 ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
204                                 if (ret == -1)
205                                         goto no_abs;
206                                 dist = ainfo.maximum - ainfo.minimum;
207                                 dev->abs_tzone = ainfo.minimum + dist / 4;
208                                 dev->abs_bzone = ainfo.maximum - dist / 4;
209                         }
210                 }
211
212 no_abs:
213                 dev->fd = fd;
214                 strcpy(name, in_evdev_prefix);
215                 ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
216                 printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
217                         name+6, count, support);
218                 in_register(name, IN_DRVID_EVDEV, fd, dev, KEY_CNT, 0);
219                 continue;
220
221 skip:
222                 close(fd);
223         }
224 }
225
226 static void in_evdev_free(void *drv_data)
227 {
228         in_evdev_t *dev = drv_data;
229         if (dev == NULL)
230                 return;
231         close(dev->fd);
232         free(dev);
233 }
234
235 static int in_evdev_get_bind_count(void)
236 {
237         return KEY_CNT;
238 }
239
240 static void or_binds(const int *binds, int key, int *result)
241 {
242         int t;
243         for (t = 0; t < IN_BINDTYPE_COUNT; t++)
244                 result[t] |= binds[IN_BIND_OFFS(key, t)];
245 }
246
247 /* ORs result with binds of pressed buttons
248  * XXX: should measure performance hit of this func, might need to optimize */
249 int in_evdev_update(void *drv_data, const int *binds, int *result)
250 {
251         struct input_event ev[16];
252         struct input_absinfo ainfo;
253         int keybits_[KEY_CNT / sizeof(int)];
254         int *keybits = keybits_;
255         in_evdev_t *dev = drv_data;
256         int rd, ret, u;
257
258         if (dev->kbits == NULL) {
259                 ret = ioctl(dev->fd, EVIOCGKEY(sizeof(keybits_)), keybits_);
260                 if (ret == -1) {
261                         perror("in_evdev: ioctl failed");
262                         return -1;
263                 }
264         }
265         else {
266                 keybits = dev->kbits;
267                 while (1) {
268                         rd = read(dev->fd, ev, sizeof(ev));
269                         if (rd < (int)sizeof(ev[0])) {
270                                 if (errno != EAGAIN)
271                                         perror("in_evdev: read failed");
272                                 break;
273                         }
274                         for (u = 0; u < rd / sizeof(ev[0]); u++) {
275                                 if (ev[u].type != EV_KEY)
276                                         continue;
277                                 else if (ev[u].value == 1)
278                                         KEYBITS_BIT_SET(ev[u].code);
279                                 else if (ev[u].value == 0)
280                                         KEYBITS_BIT_CLEAR(ev[u].code);
281                         }
282                 }
283         }
284
285         for (u = 0; u < KEY_CNT; u++) {
286                 if (KEYBITS_BIT(u))
287                         or_binds(binds, u, result);
288         }
289
290         /* map X and Y absolute to UDLR */
291         if (dev->abs_lzone != 0) {
292                 ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
293                 if (ret != -1) {
294                         if (ainfo.value < dev->abs_lzone) or_binds(binds, KEY_LEFT, result);
295                         if (ainfo.value > dev->abs_rzone) or_binds(binds, KEY_RIGHT, result);
296                 }
297         }
298         if (dev->abs_tzone != 0) {
299                 ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
300                 if (ret != -1) {
301                         if (ainfo.value < dev->abs_tzone) or_binds(binds, KEY_UP, result);
302                         if (ainfo.value > dev->abs_bzone) or_binds(binds, KEY_DOWN, result);
303                 }
304         }
305
306         return 0;
307 }
308
309 static void in_evdev_set_blocking(void *drv_data, int y)
310 {
311         in_evdev_t *dev = drv_data;
312         long flags;
313         int ret;
314
315         flags = (long)fcntl(dev->fd, F_GETFL);
316         if ((int)flags == -1) {
317                 perror("in_evdev: F_GETFL fcntl failed");
318                 return;
319         }
320
321         if (flags & O_NONBLOCK) {
322                 /* flush the event queue */
323                 struct input_event ev;
324                 do {
325                         ret = read(dev->fd, &ev, sizeof(ev));
326                 }
327                 while (ret == sizeof(ev));
328         }
329
330         if (y)
331                 flags &= ~O_NONBLOCK;
332         else
333                 flags |=  O_NONBLOCK;
334         ret = fcntl(dev->fd, F_SETFL, flags);
335         if (ret == -1)
336                 perror("in_evdev: F_SETFL fcntl failed");
337 }
338
339 static int in_evdev_update_keycode(void *data, int *is_down)
340 {
341         in_evdev_t *dev = data;
342         struct input_event ev;
343         int rd;
344
345         if (is_down != NULL)
346                 *is_down = 0;
347
348         rd = read(dev->fd, &ev, sizeof(ev));
349         if (rd < (int) sizeof(ev)) {
350                 if (errno != EAGAIN) {
351                         perror("in_evdev: error reading");
352                         sleep(1);
353                 }
354                 return -1;
355         }
356
357         if (ev.type == EV_KEY) {
358                 if (ev.value < 0 || ev.value > 1)
359                         return -1;
360                 if (is_down != NULL)
361                         *is_down = ev.value;
362                 return ev.code;
363         }
364         else if (ev.type == EV_ABS)
365         {
366                 int down = 0;
367                 if (dev->abs_lzone != 0 && ev.code == ABS_X) {
368                         if (ev.value < dev->abs_lzone) {
369                                 down = 1;
370                                 dev->abs_lastx = KEY_LEFT;
371                         }
372                         else if (ev.value > dev->abs_rzone) {
373                                 down = 1;
374                                 dev->abs_lastx = KEY_RIGHT;
375                         }
376                         if (is_down != NULL)
377                                 *is_down = down;
378                         return dev->abs_lastx;
379                 }
380                 if (dev->abs_tzone != 0 && ev.code == ABS_Y) {
381                         if (ev.value < dev->abs_tzone) {
382                                 down = 1;
383                                 dev->abs_lasty = KEY_UP;
384                         }
385                         else if (ev.value > dev->abs_bzone) {
386                                 down = 1;
387                                 dev->abs_lasty = KEY_DOWN;
388                         }
389                         if (is_down != NULL)
390                                 *is_down = down;
391                         return dev->abs_lasty;
392                 }
393         }
394
395         return -1;
396 }
397
398 static const struct {
399         short key;
400         short pbtn;
401 } key_pbtn_map[] =
402 {
403         { KEY_UP,       PBTN_UP },
404         { KEY_DOWN,     PBTN_DOWN },
405         { KEY_LEFT,     PBTN_LEFT },
406         { KEY_RIGHT,    PBTN_RIGHT },
407         { KEY_ENTER,    PBTN_MOK },
408         { BTN_A,        PBTN_MOK },
409         { BTN_TRIGGER,  PBTN_MOK },
410         { KEY_ESC,      PBTN_MBACK },
411         { BTN_B,        PBTN_MBACK },
412         { BTN_THUMB,    PBTN_MBACK },
413         { KEY_A,        PBTN_MA2 },
414         { KEY_S,        PBTN_MA3 },
415         { KEY_BACKSLASH,  PBTN_MENU },
416         { KEY_MENU,       PBTN_MENU },
417         { KEY_LEFTBRACE,  PBTN_L },
418         { KEY_RIGHTBRACE, PBTN_R },
419 };
420
421 #define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
422
423 static int in_evdev_menu_translate(int keycode)
424 {
425         int i;
426         if (keycode < 0)
427         {
428                 /* menu -> kc */
429                 keycode = -keycode;
430                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
431                         if (key_pbtn_map[i].pbtn == keycode)
432                                 return key_pbtn_map[i].key;
433         }
434         else
435         {
436                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
437                         if (key_pbtn_map[i].key == keycode)
438                                 return key_pbtn_map[i].pbtn;
439         }
440
441         return 0;
442 }
443
444 static int in_evdev_get_key_code(const char *key_name)
445 {
446         int i;
447
448         for (i = 0; i < KEY_CNT; i++) {
449                 const char *k = in_evdev_keys[i];
450                 if (k != NULL && strcasecmp(k, key_name) == 0)
451                         return i;
452         }
453
454         return -1;
455 }
456
457 static const char *in_evdev_get_key_name(int keycode)
458 {
459         const char *name = NULL;
460         if (keycode >= 0 && keycode <= KEY_MAX)
461                 name = in_evdev_keys[keycode];
462         if (name == NULL)
463                 name = "Unkn";
464         
465         return name;
466 }
467
468 static const struct {
469         short code;
470         char btype;
471         char bit;
472 } in_evdev_def_binds[] =
473 {
474         /* MXYZ SACB RLDU */
475         { KEY_UP,       IN_BINDTYPE_PLAYER12, 0 },
476         { KEY_DOWN,     IN_BINDTYPE_PLAYER12, 1 },
477         { KEY_LEFT,     IN_BINDTYPE_PLAYER12, 2 },
478         { KEY_RIGHT,    IN_BINDTYPE_PLAYER12, 3 },
479         { KEY_S,        IN_BINDTYPE_PLAYER12, 4 },      /* B */
480         { BTN_B,        IN_BINDTYPE_PLAYER12, 4 },
481         { KEY_D,        IN_BINDTYPE_PLAYER12, 5 },      /* C */
482         { BTN_A,        IN_BINDTYPE_PLAYER12, 5 },
483         { KEY_A,        IN_BINDTYPE_PLAYER12, 6 },      /* A */
484         { BTN_Y,        IN_BINDTYPE_PLAYER12, 6 },
485         { KEY_ENTER,    IN_BINDTYPE_PLAYER12, 7 },
486         { BTN_START,    IN_BINDTYPE_PLAYER12, 7 },
487         { BTN_TL,       IN_BINDTYPE_EMU, PEVB_STATE_LOAD },
488         { BTN_TR,       IN_BINDTYPE_EMU, PEVB_STATE_SAVE },
489 };
490
491 #define DEF_BIND_COUNT (sizeof(in_evdev_def_binds) / sizeof(in_evdev_def_binds[0]))
492
493 static void in_evdev_get_def_binds(int *binds)
494 {
495         int i;
496
497         for (i = 0; i < DEF_BIND_COUNT; i++)
498                 binds[IN_BIND_OFFS(in_evdev_def_binds[i].code, in_evdev_def_binds[i].btype)] =
499                         1 << in_evdev_def_binds[i].bit;
500 }
501
502 /* remove binds of missing keys, count remaining ones */
503 static int in_evdev_clean_binds(void *drv_data, int *binds, int *def_binds)
504 {
505         int keybits[KEY_CNT / sizeof(int)];
506         in_evdev_t *dev = drv_data;
507         int i, t, ret, offs, count = 0;
508
509         ret = ioctl(dev->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
510         if (ret == -1) {
511                 perror("in_evdev: ioctl failed");
512                 memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
513         }
514
515         if (dev->abs_lzone != 0) {
516                 KEYBITS_BIT_SET(KEY_LEFT);
517                 KEYBITS_BIT_SET(KEY_RIGHT);
518         }
519         if (dev->abs_tzone != 0) {
520                 KEYBITS_BIT_SET(KEY_UP);
521                 KEYBITS_BIT_SET(KEY_DOWN);
522         }
523
524         for (i = 0; i < KEY_CNT; i++) {
525                 for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
526                         offs = IN_BIND_OFFS(i, t);
527                         if (!KEYBITS_BIT(i))
528                                 binds[offs] = def_binds[offs] = 0;
529                         if (binds[offs])
530                                 count++;
531                 }
532         }
533
534         return count;
535 }
536
537 void in_evdev_init(void *vdrv)
538 {
539         in_drv_t *drv = vdrv;
540
541         drv->prefix = in_evdev_prefix;
542         drv->probe = in_evdev_probe;
543         drv->free = in_evdev_free;
544         drv->get_bind_count = in_evdev_get_bind_count;
545         drv->get_def_binds = in_evdev_get_def_binds;
546         drv->clean_binds = in_evdev_clean_binds;
547         drv->set_blocking = in_evdev_set_blocking;
548         drv->update_keycode = in_evdev_update_keycode;
549         drv->menu_translate = in_evdev_menu_translate;
550         drv->get_key_code = in_evdev_get_key_code;
551         drv->get_key_name = in_evdev_get_key_name;
552 }
553