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diff --git a/firmware/target/coldfire/iaudio/lcd-remote-iaudio.c b/firmware/target/coldfire/iaudio/lcd-remote-iaudio.c
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1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2006 by Linus Nielsen Feltzing
11 *
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
14 *
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
17 *
18 ****************************************************************************/
19#include "config.h"
20#include "system.h"
21#include "kernel.h"
22#include "lcd-remote.h"
23
24/* The LCD in the iAudio M3/M5/X5 remote control is a Tomato LSI 0350 */
25
26#define LCD_SET_DUTY_RATIO 0x48
27#define LCD_SELECT_ADC 0xa0
28#define LCD_SELECT_SHL 0xc0
29#define LCD_SET_COM0 0x44
30#define LCD_OSC_ON 0xab
31#define LCD_SELECT_DCDC 0x64
32#define LCD_SELECT_RES 0x20
33#define LCD_SET_VOLUME 0x81
34#define LCD_SET_BIAS 0x50
35#define LCD_CONTROL_POWER 0x28
36#define LCD_DISPLAY_ON 0xae
37#define LCD_SET_INITLINE 0x40
38#define LCD_SET_COLUMN 0x10
39#define LCD_SET_PAGE 0xb0
40#define LCD_SET_GRAY 0x88
41#define LCD_SET_PWM_FRC 0x90
42#define LCD_SET_POWER_SAVE 0xa8
43#define LCD_REVERSE 0xa6
44
45#define CS_LO and_l(~0x00000020, &GPIO1_OUT)
46#define CS_HI or_l(0x00000020, &GPIO1_OUT)
47#define CLK_LO and_l(~0x00004000, &GPIO_OUT)
48#define CLK_HI or_l(0x00004000, &GPIO_OUT)
49#define DATA_LO and_l(~0x00002000, &GPIO_OUT)
50#define DATA_HI or_l(0x00002000, &GPIO_OUT)
51#define RS_LO and_l(~0x00008000, &GPIO_OUT)
52#define RS_HI or_l(0x00008000, &GPIO_OUT)
53
54/* cached settings values */
55static bool cached_invert = false;
56static bool cached_flip = false;
57static int cached_contrast = DEFAULT_REMOTE_CONTRAST_SETTING;
58
59bool remote_initialized = false;
60
61static void remote_tick(void);
62
63/* Standard low-level byte writer. Requires CLK high on entry */
64static inline void _write_byte(unsigned data)
65{
66 asm volatile (
67 "move.l (%[gpo0]), %%d0 \n" /* Get current state of data line */
68 "and.l %[dbit], %%d0 \n"
69 "beq.s 1f \n" /* and set it as previous-state bit */
70 "bset #8, %[data] \n"
71 "1: \n"
72 "move.l %[data], %%d0 \n" /* Compute the 'bit derivative', i.e. a value */
73 "lsr.l #1, %%d0 \n" /* with 1's where the data changes from the */
74 "eor.l %%d0, %[data] \n" /* previous state, and 0's where it doesn't */
75 "swap %[data] \n" /* Shift data to upper byte */
76 "lsl.l #8, %[data] \n"
77
78 "move.l %[cbit], %%d1 \n" /* Prepare mask for flipping CLK */
79 "or.l %[dbit], %%d1 \n" /* and DATA at once */
80
81 "lsl.l #1,%[data] \n" /* Shift out MSB */
82 "bcc.s 1f \n"
83 "eor.l %%d1, (%[gpo0]) \n" /* 1: Flip both CLK and DATA */
84 ".word 0x51fa \n" /* (trapf.w - shadow next insn) */
85 "1: \n"
86 "eor.l %[cbit], (%[gpo0]) \n" /* else flip CLK only */
87 "eor.l %[cbit], (%[gpo0]) \n" /* Flip CLK again */
88
89 "lsl.l #1,%[data] \n" /* ..unrolled.. */
90 "bcc.s 1f \n"
91 "eor.l %%d1, (%[gpo0]) \n"
92 ".word 0x51fa \n"
93 "1: \n"
94 "eor.l %[cbit], (%[gpo0]) \n"
95 "eor.l %[cbit], (%[gpo0]) \n"
96
97 "lsl.l #1,%[data] \n"
98 "bcc.s 1f \n"
99 "eor.l %%d1, (%[gpo0]) \n"
100 ".word 0x51fa \n"
101 "1: \n"
102 "eor.l %[cbit], (%[gpo0]) \n"
103 "eor.l %[cbit], (%[gpo0]) \n"
104
105 "lsl.l #1,%[data] \n"
106 "bcc.s 1f \n"
107 "eor.l %%d1, (%[gpo0]) \n"
108 ".word 0x51fa \n"
109 "1: \n"
110 "eor.l %[cbit], (%[gpo0]) \n"
111 "eor.l %[cbit], (%[gpo0]) \n"
112
113 "lsl.l #1,%[data] \n"
114 "bcc.s 1f \n"
115 "eor.l %%d1, (%[gpo0]) \n"
116 ".word 0x51fa \n"
117 "1: \n"
118 "eor.l %[cbit], (%[gpo0]) \n"
119 "eor.l %[cbit], (%[gpo0]) \n"
120
121 "lsl.l #1,%[data] \n"
122 "bcc.s 1f \n"
123 "eor.l %%d1, (%[gpo0]) \n"
124 ".word 0x51fa \n"
125 "1: \n"
126 "eor.l %[cbit], (%[gpo0]) \n"
127 "eor.l %[cbit], (%[gpo0]) \n"
128
129 "lsl.l #1,%[data] \n"
130 "bcc.s 1f \n"
131 "eor.l %%d1, (%[gpo0]) \n"
132 ".word 0x51fa \n"
133 "1: \n"
134 "eor.l %[cbit], (%[gpo0]) \n"
135 "eor.l %[cbit], (%[gpo0]) \n"
136
137 "lsl.l #1,%[data] \n"
138 "bcc.s 1f \n"
139 "eor.l %%d1, (%[gpo0]) \n"
140 ".word 0x51fa \n"
141 "1: \n"
142 "eor.l %[cbit], (%[gpo0]) \n"
143 "eor.l %[cbit], (%[gpo0]) \n"
144 : /* outputs */
145 [data]"+d"(data)
146 : /* inputs */
147 [gpo0]"a"(&GPIO_OUT),
148 [cbit]"d"(0x00004000),
149 [dbit]"d"(0x00002000)
150 : /* clobbers */
151 "d0", "d1"
152 );
153}
154
155/* Fast low-level byte writer. Don't use with high CPU clock.
156 * Requires CLK high on entry */
157static inline void _write_fast(unsigned data)
158{
159 asm volatile (
160 "move.w %%sr,%%d3 \n" /* Get current interrupt level */
161 "move.w #0x2700,%%sr \n" /* Disable interrupts */
162
163 "move.l (%[gpo0]), %%d0 \n" /* Get current state of data port */
164 "move.l %%d0, %%d1 \n"
165 "and.l %[dbit], %%d1 \n" /* Check current state of data line */
166 "beq.s 1f \n" /* and set it as previous-state bit */
167 "bset #8, %[data] \n"
168 "1: \n"
169 "move.l %[data], %%d1 \n" /* Compute the 'bit derivative', i.e. a value */
170 "lsr.l #1, %%d1 \n" /* with 1's where the data changes from the */
171 "eor.l %%d1, %[data] \n" /* previous state, and 0's where it doesn't */
172 "swap %[data] \n" /* Shift data to upper byte */
173 "lsl.l #8, %[data] \n"
174
175 "lsl.l #1,%[data] \n" /* Shift out MSB */
176 "bcc.s 1f \n"
177 "eor.l %[dbit], %%d0 \n" /* 1: Flip data bit */
178 "1: \n"
179 "eor.l %[cbit], %%d0 \n" /* Flip clock bit */
180 "move.l %%d0, (%[gpo0]) \n" /* Output new state */
181 "eor.l %[cbit], %%d0 \n" /* Flip clock bit */
182 "move.l %%d0, (%[gpo0]) \n" /* Output new state */
183
184 "lsl.l #1,%[data] \n" /* ..unrolled.. */
185 "bcc.s 1f \n"
186 "eor.l %[dbit], %%d0 \n"
187 "1: \n"
188 "eor.l %[cbit], %%d0 \n"
189 "move.l %%d0, (%[gpo0]) \n"
190 "eor.l %[cbit], %%d0 \n"
191 "move.l %%d0, (%[gpo0]) \n"
192
193 "lsl.l #1,%[data] \n"
194 "bcc.s 1f \n"
195 "eor.l %[dbit], %%d0 \n"
196 "1: \n"
197 "eor.l %[cbit], %%d0 \n"
198 "move.l %%d0, (%[gpo0]) \n"
199 "eor.l %[cbit], %%d0 \n"
200 "move.l %%d0, (%[gpo0]) \n"
201
202 "lsl.l #1,%[data] \n"
203 "bcc.s 1f \n"
204 "eor.l %[dbit], %%d0 \n"
205 "1: \n"
206 "eor.l %[cbit], %%d0 \n"
207 "move.l %%d0, (%[gpo0]) \n"
208 "eor.l %[cbit], %%d0 \n"
209 "move.l %%d0, (%[gpo0]) \n"
210
211 "lsl.l #1,%[data] \n"
212 "bcc.s 1f \n"
213 "eor.l %[dbit], %%d0 \n"
214 "1: \n"
215 "eor.l %[cbit], %%d0 \n"
216 "move.l %%d0, (%[gpo0]) \n"
217 "eor.l %[cbit], %%d0 \n"
218 "move.l %%d0, (%[gpo0]) \n"
219
220 "lsl.l #1,%[data] \n"
221 "bcc.s 1f \n"
222 "eor.l %[dbit], %%d0 \n"
223 "1: \n"
224 "eor.l %[cbit], %%d0 \n"
225 "move.l %%d0, (%[gpo0]) \n"
226 "eor.l %[cbit], %%d0 \n"
227 "move.l %%d0, (%[gpo0]) \n"
228
229 "lsl.l #1,%[data] \n"
230 "bcc.s 1f \n"
231 "eor.l %[dbit], %%d0 \n"
232 "1: \n"
233 "eor.l %[cbit], %%d0 \n"
234 "move.l %%d0, (%[gpo0]) \n"
235 "eor.l %[cbit], %%d0 \n"
236 "move.l %%d0, (%[gpo0]) \n"
237
238 "lsl.l #1,%[data] \n"
239 "bcc.s 1f \n"
240 "eor.l %[dbit], %%d0 \n"
241 "1: \n"
242 "eor.l %[cbit], %%d0 \n"
243 "move.l %%d0, (%[gpo0]) \n"
244 "eor.l %[cbit], %%d0 \n"
245 "move.l %%d0, (%[gpo0]) \n"
246
247 "move.w %%d3, %%sr \n" /* Restore interrupt level */
248 : /* outputs */
249 [data]"+d"(data)
250 : /* inputs */
251 [gpo0]"a"(&GPIO_OUT),
252 [cbit]"d"(0x00004000),
253 [dbit]"d"(0x00002000)
254 : /* clobbers */
255 "d0", "d1", "d2", "d3"
256 );
257}
258
259void lcd_remote_write_command(int cmd)
260{
261 RS_LO;
262 CS_LO;
263 _write_byte(cmd);
264 CS_HI;
265}
266
267void lcd_remote_write_command_ex(int cmd, int data)
268{
269 RS_LO;
270 CS_LO;
271 _write_byte(cmd);
272 _write_byte(data);
273 CS_HI;
274}
275
276void lcd_remote_write_data(const unsigned char* p_bytes, int count)
277{
278 const unsigned char *p_end = p_bytes + count;
279
280 RS_HI;
281 CS_LO;
282 if (cpu_frequency < 50000000)
283 {
284 while (p_bytes < p_end)
285 _write_fast(*p_bytes++);
286 }
287 else
288 {
289 while (p_bytes < p_end)
290 _write_byte(*p_bytes++);
291 }
292 CS_HI;
293}
294
295int lcd_remote_default_contrast(void)
296{
297 return DEFAULT_REMOTE_CONTRAST_SETTING;
298}
299
300void lcd_remote_powersave(bool on)
301{
302 if(remote_initialized) {
303 if (on)
304 lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
305 else
306 lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
307 }
308}
309
310void lcd_remote_set_contrast(int val)
311{
312 if (val < 0)
313 val = 0;
314 else if (val > 63)
315 val = 63;
316
317 cached_contrast = val;
318 if(remote_initialized)
319 lcd_remote_write_command_ex(LCD_SET_VOLUME, val);
320}
321
322bool remote_detect(void)
323{
324 return (GPIO_READ & 0x01000000)?false:true;
325}
326
327void lcd_remote_init_device(void)
328{
329 or_l(0x0000e000, &GPIO_OUT);
330 or_l(0x0000e000, &GPIO_ENABLE);
331 or_l(0x0000e000, &GPIO_FUNCTION);
332
333 or_l(0x00000020, &GPIO1_OUT);
334 or_l(0x00000020, &GPIO1_ENABLE);
335 or_l(0x00000020, &GPIO1_FUNCTION);
336
337 and_l(~0x01000000, &GPIO_OUT);
338 and_l(~0x01000000, &GPIO_ENABLE);
339 or_l(0x01000000, &GPIO_FUNCTION);
340
341 lcd_remote_clear_display();
342 tick_add_task(remote_tick);
343}
344
345void lcd_remote_on(void)
346{
347 CS_HI;
348 CLK_HI;
349 sleep(10);
350
351 lcd_remote_write_command(LCD_SET_DUTY_RATIO);
352 lcd_remote_write_command(0x70); /* 1/128 */
353
354 lcd_remote_write_command(LCD_OSC_ON);
355
356 lcd_remote_write_command(LCD_SELECT_DCDC | 2); /* DC/DC 5xboost */
357
358 lcd_remote_write_command(LCD_SELECT_RES | 7); /* Regulator resistor: 7.2 */
359
360 lcd_remote_write_command(LCD_SET_BIAS | 6); /* 1/11 */
361
362 lcd_remote_write_command(LCD_CONTROL_POWER | 7); /* All circuits ON */
363
364 sleep(30);
365
366 lcd_remote_write_command_ex(LCD_SET_GRAY | 0, 0x00);
367 lcd_remote_write_command_ex(LCD_SET_GRAY | 1, 0x00);
368 lcd_remote_write_command_ex(LCD_SET_GRAY | 2, 0x0c);
369 lcd_remote_write_command_ex(LCD_SET_GRAY | 3, 0x00);
370 lcd_remote_write_command_ex(LCD_SET_GRAY | 4, 0xcc);
371 lcd_remote_write_command_ex(LCD_SET_GRAY | 5, 0x00);
372 lcd_remote_write_command_ex(LCD_SET_GRAY | 6, 0xcc);
373 lcd_remote_write_command_ex(LCD_SET_GRAY | 7, 0x0c);
374
375 lcd_remote_write_command(LCD_SET_PWM_FRC | 6); /* 4FRC + 12PWM */
376
377 lcd_remote_write_command(LCD_DISPLAY_ON | 1); /* display on */
378
379 remote_initialized = true;
380
381 lcd_remote_set_flip(cached_flip);
382 lcd_remote_set_contrast(cached_contrast);
383 lcd_remote_set_invert_display(cached_invert);
384}
385
386void lcd_remote_off(void)
387{
388 remote_initialized = false;
389 CS_HI;
390 RS_HI;
391}
392
393void lcd_remote_poweroff(void)
394{
395 /* Set power save -> Power OFF (VDD - VSS) .. that's it */
396 if (remote_initialized && remote_detect())
397 lcd_remote_write_command(LCD_SET_POWER_SAVE | 1);
398}
399
400/* Monitor remote hotswap */
401static void remote_tick(void)
402{
403 static bool last_status = false;
404 static int countdown = 0;
405 static int init_delay = 0;
406 bool current_status;
407
408 current_status = remote_detect();
409
410 /* Only report when the status has changed */
411 if (current_status != last_status)
412 {
413 last_status = current_status;
414 countdown = current_status ? 20*HZ : 1;
415 }
416 else
417 {
418 /* Count down until it gets negative */
419 if (countdown >= 0)
420 countdown--;
421
422 if (current_status)
423 {
424 if (!(countdown % 8))
425 {
426 if (--init_delay <= 0)
427 {
428 queue_post(&remote_scroll_queue, REMOTE_INIT_LCD, 0);
429 init_delay = 6;
430 }
431 }
432 }
433 else
434 {
435 if (countdown == 0)
436 {
437 queue_post(&remote_scroll_queue, REMOTE_DEINIT_LCD, 0);
438 }
439 }
440 }
441}
442
443/* Update the display.
444 This must be called after all other LCD functions that change the display. */
445void lcd_remote_update(void) ICODE_ATTR;
446void lcd_remote_update(void)
447{
448 int y;
449 if(remote_initialized) {
450 for(y = 0;y < LCD_REMOTE_FBHEIGHT;y++) {
451 /* Copy display bitmap to hardware.
452 The COM48-COM63 lines are not connected so we have to skip
453 them. Further, the column address doesn't wrap, so we
454 have to update one page at a time. */
455 lcd_remote_write_command(LCD_SET_PAGE | (y>5?y+2:y));
456 lcd_remote_write_command_ex(LCD_SET_COLUMN | 0, 0);
457 lcd_remote_write_data((unsigned char *)lcd_remote_framebuffer[y],
458 LCD_REMOTE_WIDTH*2);
459 }
460 }
461}
462
463/* Update a fraction of the display. */
464void lcd_remote_update_rect(int, int, int, int) ICODE_ATTR;
465void lcd_remote_update_rect(int x, int y, int width, int height)
466{
467 if(remote_initialized) {
468 int ymax;
469
470 /* The Y coordinates have to work on even 8 pixel rows */
471 ymax = (y + height-1) >> 3;
472 y >>= 3;
473
474 if(x + width > LCD_REMOTE_WIDTH)
475 width = LCD_REMOTE_WIDTH - x;
476 if (width <= 0)
477 return; /* nothing left to do, 0 is harmful to lcd_write_data() */
478 if(ymax >= LCD_REMOTE_FBHEIGHT)
479 ymax = LCD_REMOTE_FBHEIGHT-1;
480
481 /* Copy specified rectangle bitmap to hardware
482 COM48-COM63 are not connected, so we need to skip those */
483 for (; y <= ymax; y++)
484 {
485 lcd_remote_write_command(LCD_SET_PAGE |
486 ((y > 5?y + 2:y) & 0xf));
487 lcd_remote_write_command_ex(LCD_SET_COLUMN | ((x >> 4) & 0xf),
488 x & 0xf);
489
490 lcd_remote_write_data (
491 (unsigned char *)&lcd_remote_framebuffer[y][x], width*2);
492 }
493 }
494}
495
496void lcd_remote_set_invert_display(bool yesno)
497{
498 cached_invert = yesno;
499 if(remote_initialized)
500 lcd_remote_write_command(LCD_REVERSE | yesno);
501}
502
503void lcd_remote_set_flip(bool yesno)
504{
505 cached_flip = yesno;
506 if(remote_initialized) {
507 if(yesno) {
508 lcd_remote_write_command(LCD_SELECT_ADC | 0);
509 lcd_remote_write_command(LCD_SELECT_SHL | 0);
510 lcd_remote_write_command_ex(LCD_SET_COM0, 16);
511 } else {
512 lcd_remote_write_command(LCD_SELECT_ADC | 1);
513 lcd_remote_write_command(LCD_SELECT_SHL | 8);
514 lcd_remote_write_command_ex(LCD_SET_COM0, 0);
515 }
516 }
517}
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