summaryrefslogtreecommitdiffstats
path: root/firmware/drivers/button.c
blob: a0a43d2871bc32a1aa2b7f13631e00bc2bf68735 (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
/***************************************************************************
 *             __________               __   ___.
 *   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"

struct event_queue button_queue;

/* how often we check to see if a button is pressed */
#define POLL_FREQUENCY    HZ/20

/* how long until repeat kicks in */
#define REPEAT_START      6

/* the speed repeat starts at */
#define REPEAT_INTERVAL_START   4

/* speed repeat finishes at */
#define REPEAT_INTERVAL_FINISH  2

static int repeat_mask = DEFAULT_REPEAT_MASK;
static int release_mask = DEFAULT_RELEASE_MASK;

static int button_read(void);

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

    /* only poll every X ticks */
    if ( ++tick >= POLL_FREQUENCY )
    {
        bool post = false;
        int btn = button_read();
        
        /* Find out if a key has been released */
        diff = btn ^ lastbtn;
        if((btn & diff) == 0)
        {
            if(diff & release_mask)
                queue_post(&button_queue, BUTTON_REL | diff, NULL);
        }
        
        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;
                    }
                }
                else
                {
                    if(btn & repeat_mask ||
#ifdef HAVE_RECORDER_KEYPAD
                     btn == BUTTON_OFF)
#else
                     btn == BUTTON_STOP)
#endif
                    {
                        if (count++ > REPEAT_START)
                        {
                            /* Only repeat if a repeatable key is pressed */
                            if(btn & repeat_mask)
                            {
                                post = true;
                                repeat = true;
                                /* initial repeat */
                                count = REPEAT_INTERVAL_START; 
                            }
                            /* If the OFF button is pressed long enough,
                               and we are still alive, then the unit must be
                               connected to a charger. Therefore we will
                               reboot and let the original firmware handle
                               the charging. */
#ifdef HAVE_RECORDER_KEYPAD
                            if(btn == BUTTON_OFF)
#elif HAVE_PLAYER_KEYPAD
                            if(btn == BUTTON_STOP)
#endif
                                system_reboot();
                        }
                    }
                    else
                    {
                        count = 0;
                    }
                }
            }
            if ( post )
            {
                if(repeat)
                    queue_post(&button_queue, BUTTON_REPEAT | btn, NULL);
                else
                    queue_post(&button_queue, btn, NULL);
                backlight_on();
            }
        }
        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;
    unsigned int timeout = current_tick + ticks;

    while (TIME_BEFORE( current_tick, timeout ))
    {
        if(!queue_empty(&button_queue))
        {
            queue_wait(&button_queue, &ev);
            return ev.id;
        }
        yield();
    }

    return BUTTON_NONE;
}

int button_set_repeat(int newmask)
{
    int oldmask = repeat_mask;
    repeat_mask = newmask;
    return oldmask;
}

int button_set_release(int newmask)
{
    int oldmask = release_mask;
    release_mask = newmask;
    return oldmask;
}

#ifdef HAVE_RECORDER_KEYPAD

/* 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 */
#define	LEVEL1		250
#define	LEVEL2		450
#define	LEVEL3		650
#define	LEVEL4		850

/*
 *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);
    tick_add_task(button_tick);
}

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

    /* Check port B pins for ON and OFF */
    int data = PBDR;
    if ((data & PBDR_BTN_ON) == 0)
        btn |= BUTTON_ON;
    else if ((data & PBDR_BTN_OFF) == 0)
        btn |= BUTTON_OFF;

    /* 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;

    /* Check DOWN, PLAY, LEFT, RIGHT */
    data = adc_read(ADC_BUTTON_ROW2);
    if (data >= LEVEL4)
        btn |= BUTTON_DOWN;
    else if (data >= LEVEL3)
        btn |= BUTTON_PLAY;
    else if (data >= LEVEL2)
        btn |= BUTTON_LEFT;
    else if (data >= LEVEL1)
        btn |= BUTTON_RIGHT;
  
    return btn;
}

#elif HAVE_PLAYER_KEYPAD

/* 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);
    tick_add_task(button_tick);
}

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 | BUTTON_UP;

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

    return btn;
}

#endif



/* -----------------------------------------------------------------
 * local variables:
 * eval: (load-file "../rockbox-mode.el")
 * end:
 */