summaryrefslogtreecommitdiffstats
path: root/firmware/drivers/button.c
blob: 0cfe1d1aa09920376ca4e1e04c1a080153507ccd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 by Daniel Stenberg
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
/*
 * Archos Jukebox Recorder button functions
 */

#include <stdlib.h>
#include "config.h"
#include "sh7034.h"
#include "system.h"
#include "button.h"
#include "kernel.h"
#include "backlight.h"
#include "adc.h"
#include "serial.h"
#include "power.h"
#include "system.h"
#include "powermgmt.h"

struct event_queue button_queue;

static int lastbtn;   /* Last valid button status */
#if (CONFIG_KEYPAD == RECORDER_PAD) || (CONFIG_KEYPAD == ONDIO_PAD)
static int last_read; /* Last button status, for debouncing/filtering */
static bool flipped; /* bottons can be flipped to match the LCD flip */
#endif

/* how often we check to see if a button is pressed */
#define POLL_FREQUENCY    HZ/100

/* how long until repeat kicks in */
#define REPEAT_START      30

/* the speed repeat starts at */
#define REPEAT_INTERVAL_START   16

/* speed repeat finishes at */
#define REPEAT_INTERVAL_FINISH  5

/* Number of repeated keys before shutting off */
#define POWEROFF_COUNT 10

static int button_read(void);

static void button_tick(void)
{
    static int tick = 0;
    static int count = 0;
    static int repeat_speed = REPEAT_INTERVAL_START;
    static int repeat_count = 0;
    static bool repeat = false;
    int diff;
    int btn;

#ifndef HAVE_MMC
    /* Post events for the remote control */
    btn = remote_control_rx();
    if(btn)
    {
        queue_post(&button_queue, btn, NULL);
    }   
#endif
    
    /* only poll every X ticks */
    if ( ++tick >= POLL_FREQUENCY )
    {
        bool post = false;
        btn = button_read();
        
        /* Find out if a key has been released */
        diff = btn ^ lastbtn;
        if(diff && (btn & diff) == 0)
        {
            queue_post(&button_queue, BUTTON_REL | diff, NULL);
        }
        else
        {
            if ( btn )
            {
                /* normal keypress */
                if ( btn != lastbtn )
                {
                    post = true;
                    repeat = false;
                    repeat_speed = REPEAT_INTERVAL_START;
                    
                }
                else /* repeat? */
                {
                    if ( repeat )
                    {
                        count--;
                        if (count == 0) {
                            post = true;
                            /* yes we have repeat */
                            repeat_speed--;
                            if (repeat_speed < REPEAT_INTERVAL_FINISH)
                                repeat_speed = REPEAT_INTERVAL_FINISH;
                            count = repeat_speed;
                            
                            repeat_count++;
                            
                            /* Send a SYS_POWEROFF event if we have a device
                               which doesn't shut down easily with the OFF
                               key */
#ifdef HAVE_SW_POWEROFF
                            if(btn == BUTTON_OFF && !charger_inserted() &&
                               repeat_count > POWEROFF_COUNT)
                                queue_post(&button_queue, SYS_POWEROFF, NULL);
#endif
                        }
                    }
                    else
                    {
                        if (count++ > REPEAT_START)
                        {
                            post = true;
                            repeat = true;
                            repeat_count = 0;
                            /* initial repeat */
                            count = REPEAT_INTERVAL_START; 
                        }
                    }
                }
                if ( post )
                {
                    if(repeat)
                        queue_post(&button_queue, BUTTON_REPEAT | btn, NULL);
                    else
                        queue_post(&button_queue, btn, NULL);
                    backlight_on();
                    
                    reset_poweroff_timer();
                }
            }
            else
            {
                repeat = false;
                count = 0;
            }
        }
        lastbtn = btn & ~(BUTTON_REL | BUTTON_REPEAT);
        tick = 0;
    }
        
    backlight_tick();
}

int button_get(bool block)
{
    struct event ev;

    if ( block || !queue_empty(&button_queue) ) {
        queue_wait(&button_queue, &ev);
        return ev.id;
    }
    return BUTTON_NONE;
}

int button_get_w_tmo(int ticks)
{
    struct event ev;
    queue_wait_w_tmo(&button_queue, &ev, ticks);
    return (ev.id != SYS_TIMEOUT)? ev.id: BUTTON_NONE;
}

#if CONFIG_KEYPAD == RECORDER_PAD

/* AJBR buttons are connected to the CPU as follows:
 *
 * ON and OFF are connected to separate port B input pins.
 *
 * F1, F2, F3, and UP are connected to the AN4 analog input, each through
 * a separate voltage divider.  The voltage on AN4 depends on which button
 * (or none, or a combination) is pressed.
 *
 * DOWN, PLAY, LEFT, and RIGHT are likewise connected to AN5. */
 
/* Button analog voltage levels */
#ifdef HAVE_FMADC
/* FM Recorder super-special levels */
#define	LEVEL1		150
#define	LEVEL2		385
#define	LEVEL3		545
#define	LEVEL4		700
#else
/* plain bog standard Recorder levels */
#define	LEVEL1		250
#define	LEVEL2		500
#define	LEVEL3		700
#define	LEVEL4		900
#endif

/*
 *Initialize buttons
 */
void button_init()
{
#ifndef SIMULATOR
    /* Set PB4 and PB8 as input pins */
    PBCR1 &= 0xfffc; /* PB8MD = 00 */
    PBCR2 &= 0xfcff; /* PB4MD = 00 */
    PBIOR &= ~(PBDR_BTN_ON|PBDR_BTN_OFF); /* Inputs */
#endif
    queue_init(&button_queue);
    lastbtn = 0;
    tick_add_task(button_tick);
    reset_poweroff_timer();
    flipped = false;
}


/*
 * helper function to swap UP/DOWN, LEFT/RIGHT, F1/F3
 */
static int button_flip(int button)
{
    int newbutton;

    newbutton = button & 
        ~(BUTTON_UP | BUTTON_DOWN
        | BUTTON_LEFT | BUTTON_RIGHT 
        | BUTTON_F1 | BUTTON_F3);

    if (button & BUTTON_UP)
        newbutton |= BUTTON_DOWN;
    if (button & BUTTON_DOWN)
        newbutton |= BUTTON_UP;
    if (button & BUTTON_LEFT)
        newbutton |= BUTTON_RIGHT;
    if (button & BUTTON_RIGHT)
        newbutton |= BUTTON_LEFT;
    if (button & BUTTON_F1)
        newbutton |= BUTTON_F3;
    if (button & BUTTON_F3)
        newbutton |= BUTTON_F1;

    return newbutton;
}


/*
 * set the flip attribute
 * better only call this when the queue is empty
 */
void button_set_flip(bool flip)
{
    if (flip != flipped) /* not the current setting */
    {
        /* avoid race condition with the button_tick() */
        int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
        lastbtn = button_flip(lastbtn); 
        flipped = flip;
        set_irq_level(oldlevel);
    }
}

/*
 * Get button pressed from hardware
 */
static int button_read(void)
{
    int btn = BUTTON_NONE;
    int retval;

    /* Check port B pins for ON and OFF */
    int data;

#ifdef HAVE_FMADC
    /* TODO: use proper defines here, and not the numerics in the
       function argument */
    if ( adc_read(3) < 512 )
        btn |= BUTTON_ON;
    if ( adc_read(2) > 512 )
        btn |= BUTTON_OFF;
#else
    data = PBDR;
    if ((data & PBDR_BTN_ON) == 0)
        btn |= BUTTON_ON;
    else if ((data & PBDR_BTN_OFF) == 0)
        btn |= BUTTON_OFF;
#endif

    /* Check F1-3 and UP */
    data = adc_read(ADC_BUTTON_ROW1);
    if (data >= LEVEL4)
        btn |= BUTTON_F3;
    else if (data >= LEVEL3)
        btn |= BUTTON_UP;
    else if (data >= LEVEL2)
        btn |= BUTTON_F2;
    else if (data >= LEVEL1)
        btn |= BUTTON_F1;

    /* Some units have mushy keypads, so pressing UP also activates
       the Left/Right buttons. Let's combat that by skipping the AN5
       checks when UP is pressed. */
    if(!(btn & BUTTON_UP))
    {
        /* Check DOWN, PLAY, LEFT, RIGHT */
        data = adc_read(ADC_BUTTON_ROW2);
        if (data >= LEVEL4)
            btn |= BUTTON_DOWN;
        else if (data >= LEVEL3) {
#ifdef HAVE_FMADC
            btn |= BUTTON_RIGHT;
#else
            btn |= BUTTON_PLAY;
#endif
        }
        else if (data >= LEVEL2)
            btn |= BUTTON_LEFT;
        else if (data >= LEVEL1) {
#ifdef HAVE_FMADC
            btn |= BUTTON_PLAY;
#else
            btn |= BUTTON_RIGHT;
#endif
        }
    }

    if (btn && flipped)
        btn = button_flip(btn); /* swap upside down */

    /* Filter the button status. It is only accepted if we get the same
       status twice in a row. */
    if(btn != last_read)
        retval = lastbtn;
    else
        retval = btn;
    last_read = btn;
    
    return retval;
}

#elif CONFIG_KEYPAD == PLAYER_PAD

/* The player has two buttons on port pins:

   STOP:  PA11
   ON:    PA5

   The rest are on analog inputs:
   
   LEFT:  AN0
   MENU:  AN1
   RIGHT: AN2
   PLAY:  AN3
*/

void button_init(void)
{
    /* set port pins as input */
    PAIOR &= ~0x820;
    queue_init(&button_queue);
    lastbtn = 0;
    tick_add_task(button_tick);

    reset_poweroff_timer();
}

static int button_read(void)
{
    int porta = PADR;
    int btn = BUTTON_NONE;

    /* buttons are active low */
    if(adc_read(0) < 0x180)
        btn |= BUTTON_LEFT;
    if(adc_read(1) < 0x180)
        btn |= BUTTON_MENU;
    if(adc_read(2) < 0x180)
        btn |= BUTTON_RIGHT;
    if(adc_read(3) < 0x180)
        btn |= BUTTON_PLAY;

    if ( !(porta & 0x20) )
        btn |= BUTTON_ON;
    if ( !(porta & 0x800) )
        btn |= BUTTON_STOP;

    return btn;
}

#elif CONFIG_KEYPAD == ONDIO_PAD

/*
 * helper function to swap UP/DOWN, LEFT/RIGHT
 */
static int button_flip(int button)
{
    int newbutton;

    newbutton = button & 
        ~(BUTTON_UP | BUTTON_DOWN
        | BUTTON_LEFT | BUTTON_RIGHT);

    if (button & BUTTON_UP)
        newbutton |= BUTTON_DOWN;
    if (button & BUTTON_DOWN)
        newbutton |= BUTTON_UP;
    if (button & BUTTON_LEFT)
        newbutton |= BUTTON_RIGHT;
    if (button & BUTTON_RIGHT)
        newbutton |= BUTTON_LEFT;

    return newbutton;
}


/*
 * set the flip attribute
 * better only call this when the queue is empty
 */
void button_set_flip(bool flip)
{
    if (flip != flipped) /* not the current setting */
    {
        /* avoid race condition with the button_tick() */
        int oldlevel = set_irq_level(HIGHEST_IRQ_LEVEL);
        lastbtn = button_flip(lastbtn); 
        flipped = flip;
        set_irq_level(oldlevel);
    }
}


/* The Ondio its 6 buttons on analog inputs:
   OPTION: AN2 (used as MENU for now)
   ON/OFF: AN3
   LEFT/RIGHT/UP/DOWN: AN4
   We map them like the player keys for now, although this is far from optimal.
*/
void button_init(void)
{
    queue_init(&button_queue);
    lastbtn = 0;
    tick_add_task(button_tick);

    reset_poweroff_timer();
}

static int button_read(void)
{
    int btn = BUTTON_NONE;
    int retval;

    int data = adc_read(ADC_BUTTON_ROW1);

    if(adc_read(ADC_BUTTON_OPTION) > 0x200) /* active high */
        btn |= BUTTON_MENU;
    if(adc_read(ADC_BUTTON_ONOFF) < 0x120) /* active low */
        btn |= BUTTON_OFF;

    /* Check the 4 direction keys, hard-coded analog limits for now */
    if (data >= 0x2EF)
        btn |= BUTTON_LEFT;
    else if (data >= 0x246)
        btn |= BUTTON_RIGHT;
    else if (data >= 0x19D)
        btn |= BUTTON_UP;
    else if (data >= 0x0A1)
        btn |= BUTTON_DOWN;

    if (btn && flipped)
        btn = button_flip(btn); /* swap upside down */

    /* Filter the button status. It is only accepted if we get the same
       status twice in a row. */
    if(btn != last_read)
        retval = lastbtn;
    else
        retval = btn;
    last_read = btn;

    return retval;
}

#endif

int button_status(void)
{
    return button_read();
}

void button_clear_queue(void)
{
    queue_clear(&button_queue);
}