summaryrefslogtreecommitdiffstats
path: root/firmware/target/coldfire/iaudio/x5/lcd-remote-x5.c
blob: 6e3bb01a150b74a8f290071f7105ca2a879954fb (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
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2006 by Linus Nielsen Feltzing
 *
 * 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.
 *
 ****************************************************************************/
#include "config.h"
#include "system.h"
#include "kernel.h"
#include "lcd-remote.h"

/* The LCD in the iAudio M3/M5/X5 remote control is a Tomato LSI 0350 */

#define LCD_SET_DUTY_RATIO 0x48
#define LCD_SELECT_ADC     0xa0
#define LCD_SELECT_SHL     0xc0
#define LCD_SET_COM0       0x44
#define LCD_OSC_ON         0xab
#define LCD_SELECT_DCDC    0x64
#define LCD_SELECT_RES     0x20
#define LCD_SET_VOLUME     0x81
#define LCD_SET_BIAS       0x50
#define LCD_CONTROL_POWER  0x28
#define LCD_DISPLAY_ON     0xae
#define LCD_SET_INITLINE   0x40
#define LCD_SET_COLUMN     0x10
#define LCD_SET_PAGE       0xb0
#define LCD_SET_GRAY       0x88
#define LCD_SET_PWM_FRC    0x90
#define LCD_SET_POWER_SAVE 0xa8
#define LCD_REVERSE        0xa6

#define CS_LO      and_l(~0x00000020, &GPIO1_OUT)
#define CS_HI      or_l(0x00000020, &GPIO1_OUT)
#define CLK_LO     and_l(~0x00004000, &GPIO_OUT)
#define CLK_HI     or_l(0x00004000, &GPIO_OUT)
#define DATA_LO    and_l(~0x00002000, &GPIO_OUT)
#define DATA_HI    or_l(0x00002000, &GPIO_OUT)
#define RS_LO      and_l(~0x00008000, &GPIO_OUT)
#define RS_HI      or_l(0x00008000, &GPIO_OUT)

/* cached settings values */
static bool cached_invert = false;
static bool cached_flip = false;
static int cached_contrast = DEFAULT_REMOTE_CONTRAST_SETTING;

bool remote_initialized = false;

/* Standard low-level byte writer. Requires CLK high on entry */
static inline void _write_byte(unsigned data)
{
    asm volatile (
        "move.l  (%[gpo0]), %%d0     \n"  /* Get current state of data line */
        "and.l   %[dbit], %%d0       \n"
        "beq.s   1f                  \n"  /*   and set it as previous-state bit */
        "bset    #8, %[data]         \n"  
    "1:                              \n"
        "move.l  %[data], %%d0       \n"  /* Compute the 'bit derivative', i.e. a value */
        "lsr.l   #1, %%d0            \n"  /*   with 1's where the data changes from the */
        "eor.l   %%d0, %[data]       \n"  /*   previous state, and 0's where it doesn't */
        "swap    %[data]             \n"  /* Shift data to upper byte */
        "lsl.l   #8, %[data]         \n"
        
        "move.l  %[cbit], %%d1       \n"  /* Prepare mask for flipping CLK */
        "or.l    %[dbit], %%d1       \n"  /*   and DATA at once */

        "lsl.l   #1,%[data]          \n"  /* Shift out MSB */
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"  /* 1: Flip both CLK and DATA */
        ".word   0x51fa              \n"  /* (trapf.w - shadow next insn) */
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"  /*   else flip CLK only */
        "eor.l   %[cbit], (%[gpo0])  \n"  /* Flip CLK again */

        "lsl.l   #1,%[data]          \n"  /* ..unrolled.. */
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"
        ".word   0x51fa              \n"
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        "eor.l   %[cbit], (%[gpo0])  \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"
        ".word   0x51fa              \n"
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        "eor.l   %[cbit], (%[gpo0])  \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"
        ".word   0x51fa              \n"
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        "eor.l   %[cbit], (%[gpo0])  \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"
        ".word   0x51fa              \n"
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        "eor.l   %[cbit], (%[gpo0])  \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"
        ".word   0x51fa              \n"
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        "eor.l   %[cbit], (%[gpo0])  \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"
        ".word   0x51fa              \n"
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        "eor.l   %[cbit], (%[gpo0])  \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %%d1, (%[gpo0])     \n"
        ".word   0x51fa              \n"
    "1:                              \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        "eor.l   %[cbit], (%[gpo0])  \n"
        : /* outputs */
        [data]"+d"(data)
        : /* inputs */
        [gpo0]"a"(&GPIO_OUT),
        [cbit]"d"(0x00004000),
        [dbit]"d"(0x00002000)
        : /* clobbers */
        "d0", "d1"
    );
}

/* Fast low-level byte writer. Don't use with high CPU clock.
 * Requires CLK high on entry */
static inline void _write_fast(unsigned data)
{
    asm volatile (
        "move.w  %%sr,%%d3           \n"  /* Get current interrupt level */
        "move.w  #0x2700,%%sr        \n"  /* Disable interrupts */

        "move.l  (%[gpo0]), %%d0     \n"  /* Get current state of data port */
        "move.l  %%d0, %%d1          \n"
        "and.l   %[dbit], %%d1       \n"  /* Check current state of data line */
        "beq.s   1f                  \n"  /*   and set it as previous-state bit */
        "bset    #8, %[data]         \n"
    "1:                              \n"
        "move.l  %[data], %%d1       \n"  /* Compute the 'bit derivative', i.e. a value */
        "lsr.l   #1, %%d1            \n"  /*   with 1's where the data changes from the */
        "eor.l   %%d1, %[data]       \n"  /*   previous state, and 0's where it doesn't */
        "swap    %[data]             \n"  /* Shift data to upper byte */
        "lsl.l   #8, %[data]         \n"
        
        "lsl.l   #1,%[data]          \n"  /* Shift out MSB */
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"  /* 1: Flip data bit */
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"  /* Flip clock bit */
        "move.l  %%d0, (%[gpo0])     \n"  /* Output new state */
        "eor.l   %[cbit], %%d0       \n"  /* Flip clock bit */
        "move.l  %%d0, (%[gpo0])     \n"  /* Output new state */

        "lsl.l   #1,%[data]          \n"  /* ..unrolled.. */
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"

        "lsl.l   #1,%[data]          \n"
        "bcc.s   1f                  \n"
        "eor.l   %[dbit], %%d0       \n"
    "1:                              \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"
        "eor.l   %[cbit], %%d0       \n"
        "move.l  %%d0, (%[gpo0])     \n"  

        "move.w  %%d3, %%sr          \n" /* Restore interrupt level */
        : /* outputs */
        [data]"+d"(data)
        : /* inputs */
        [gpo0]"a"(&GPIO_OUT),
        [cbit]"d"(0x00004000),
        [dbit]"d"(0x00002000)
        : /* clobbers */
        "d0", "d1", "d2", "d3"
    );
}

void lcd_remote_write_command(int cmd)
{
    RS_LO;
    CS_LO;
    _write_byte(cmd);
    CS_HI;
}

void lcd_remote_write_command_ex(int cmd, int data)
{
    RS_LO;
    CS_LO;
    _write_byte(cmd);
    _write_byte(data);
    CS_HI;
}

void lcd_remote_write_data(const unsigned char* p_bytes, int count)
{
    const unsigned char *p_end = p_bytes + count;

    RS_HI;
    CS_LO;
    if (cpu_frequency < 50000000)
    {
        while (p_bytes < p_end)
            _write_fast(*p_bytes++);
    }
    else
    {
        while (p_bytes < p_end)
            _write_byte(*p_bytes++);
    }
    CS_HI;
}

int lcd_remote_default_contrast(void)
{
    return DEFAULT_REMOTE_CONTRAST_SETTING;
}

void lcd_remote_powersave(bool on)
{
    if(remote_initialized) {
        if (on)
            lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
        else
            lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
    }
}

void lcd_remote_set_contrast(int val)
{
    if (val < 0)
        val = 0;
    else if (val > 63)
        val = 63;

    cached_contrast = val;
    if(remote_initialized)
        lcd_remote_write_command_ex(LCD_SET_VOLUME, val);
}

bool remote_detect(void)
{
    return (GPIO_READ & 0x01000000)?false:true;
}

void lcd_remote_init_device(void)
{
    or_l(0x0000e000, &GPIO_OUT);
    or_l(0x0000e000, &GPIO_ENABLE);
    or_l(0x0000e000, &GPIO_FUNCTION);
    
    or_l(0x00000020, &GPIO1_OUT);
    or_l(0x00000020, &GPIO1_ENABLE);
    or_l(0x00000020, &GPIO1_FUNCTION);
    
    and_l(~0x01000000, &GPIO_OUT);
    and_l(~0x01000000, &GPIO_ENABLE);
    or_l(0x01000000, &GPIO_FUNCTION);
}

void lcd_remote_on(void)
{
    CS_HI;
    CLK_HI;
    sleep(10);
    
    lcd_remote_write_command(LCD_SET_DUTY_RATIO);
    lcd_remote_write_command(0x70);  /* 1/128 */
    
    lcd_remote_write_command(LCD_OSC_ON);
    
    lcd_remote_write_command(LCD_SELECT_DCDC | 2); /* DC/DC 5xboost */
    
    lcd_remote_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */
    
    lcd_remote_write_command(LCD_SET_BIAS | 6); /* 1/11 */
    
    lcd_remote_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */
    
    sleep(30);
    
    lcd_remote_write_command_ex(LCD_SET_GRAY | 0, 0x00);
    lcd_remote_write_command_ex(LCD_SET_GRAY | 1, 0x00);
    lcd_remote_write_command_ex(LCD_SET_GRAY | 2, 0x0c);
    lcd_remote_write_command_ex(LCD_SET_GRAY | 3, 0x00);
    lcd_remote_write_command_ex(LCD_SET_GRAY | 4, 0xcc);
    lcd_remote_write_command_ex(LCD_SET_GRAY | 5, 0x00);
    lcd_remote_write_command_ex(LCD_SET_GRAY | 6, 0xcc);
    lcd_remote_write_command_ex(LCD_SET_GRAY | 7, 0x0c);
    
    lcd_remote_write_command(LCD_SET_PWM_FRC | 6); /* 4FRC + 12PWM */
    
    lcd_remote_write_command(LCD_DISPLAY_ON | 1); /* display on */

    remote_initialized = true;

    lcd_remote_set_flip(cached_flip);
    lcd_remote_set_contrast(cached_contrast);
    lcd_remote_set_invert_display(cached_invert);
}

void lcd_remote_off(void)
{
    remote_initialized = false;
    CS_HI;
    RS_HI;
}

void lcd_remote_poweroff(void)
{
    /* Set power save -> Power OFF (VDD - VSS) .. that's it */
    if (remote_initialized && remote_detect())
        lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
}

/* Update the display.
   This must be called after all other LCD functions that change the display. */
void lcd_remote_update(void) ICODE_ATTR;
void lcd_remote_update(void)
{
    int y;
    if(remote_initialized) {
        for(y = 0;y < LCD_REMOTE_HEIGHT/8;y++) {
            /* Copy display bitmap to hardware.
               The COM48-COM63 lines are not connected so we have to skip
               them. Further, the column address doesn't wrap, so we
               have to update one page at a time. */
            lcd_remote_write_command(LCD_SET_PAGE | (y>5?y+2:y));
            lcd_remote_write_command_ex(LCD_SET_COLUMN | 0, 0);
            lcd_remote_write_data((unsigned char *)lcd_remote_framebuffer[y],
                                  LCD_REMOTE_WIDTH*2);
        }
    }
}

/* Update a fraction of the display. */
void lcd_remote_update_rect(int, int, int, int) ICODE_ATTR;
void lcd_remote_update_rect(int x, int y, int width, int height)
{
    if(remote_initialized) {
        int ymax;

        /* The Y coordinates have to work on even 8 pixel rows */
        ymax = (y + height-1) >> 3;
        y >>= 3;

        if(x + width > LCD_REMOTE_WIDTH)
            width = LCD_REMOTE_WIDTH - x;
        if (width <= 0)
            return; /* nothing left to do, 0 is harmful to lcd_write_data() */
        if(ymax >= LCD_REMOTE_HEIGHT)
            ymax = LCD_REMOTE_HEIGHT-1;

        /* Copy specified rectangle bitmap to hardware
           COM48-COM63 are not connected, so we need to skip those */
        for (; y <= ymax; y++) 
        {
            lcd_remote_write_command(LCD_SET_PAGE |
                                     ((y > 5?y + 2:y) & 0xf));
            lcd_remote_write_command_ex(LCD_SET_COLUMN | ((x >> 4) & 0xf),
                                        x & 0xf);

            lcd_remote_write_data (
                (unsigned char *)&lcd_remote_framebuffer[y][x], width*2);
        } 
    }
}

void lcd_remote_set_invert_display(bool yesno)
{
    cached_invert = yesno;
    if(remote_initialized)
        lcd_remote_write_command(LCD_REVERSE | yesno);
}

void lcd_remote_set_flip(bool yesno)
{
    cached_flip = yesno;
    if(remote_initialized) {
        if(yesno) {
            lcd_remote_write_command(LCD_SELECT_ADC | 0);
            lcd_remote_write_command(LCD_SELECT_SHL | 0);
            lcd_remote_write_command_ex(LCD_SET_COM0, 16);
        } else {
            lcd_remote_write_command(LCD_SELECT_ADC | 1);
            lcd_remote_write_command(LCD_SELECT_SHL | 8);
            lcd_remote_write_command_ex(LCD_SET_COM0, 0);
        }
    }
}