root / hw / tsc2005.c @ 94410b78
History | View | Annotate | Download (15.4 kB)
1 |
/*
|
---|---|
2 |
* TI TSC2005 emulator.
|
3 |
*
|
4 |
* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
|
5 |
* Copyright (C) 2008 Nokia Corporation
|
6 |
*
|
7 |
* This program is free software; you can redistribute it and/or
|
8 |
* modify it under the terms of the GNU General Public License as
|
9 |
* published by the Free Software Foundation; either version 2 or
|
10 |
* (at your option) version 3 of the License.
|
11 |
*
|
12 |
* This program is distributed in the hope that it will be useful,
|
13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
15 |
* GNU General Public License for more details.
|
16 |
*
|
17 |
* You should have received a copy of the GNU General Public License along
|
18 |
* with this program; if not, write to the Free Software Foundation, Inc.,
|
19 |
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
20 |
*/
|
21 |
|
22 |
#include "hw.h" |
23 |
#include "qemu-timer.h" |
24 |
#include "console.h" |
25 |
#include "devices.h" |
26 |
|
27 |
#define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - (p ? 12 : 10))) |
28 |
|
29 |
struct tsc2005_state_s {
|
30 |
qemu_irq pint; /* Combination of the nPENIRQ and DAV signals */
|
31 |
QEMUTimer *timer; |
32 |
uint16_t model; |
33 |
|
34 |
int x, y;
|
35 |
int pressure;
|
36 |
|
37 |
int state, reg, irq, command;
|
38 |
uint16_t data, dav; |
39 |
|
40 |
int busy;
|
41 |
int enabled;
|
42 |
int host_mode;
|
43 |
int function;
|
44 |
int nextfunction;
|
45 |
int precision;
|
46 |
int nextprecision;
|
47 |
int filter;
|
48 |
int pin_func;
|
49 |
int timing[2]; |
50 |
int noise;
|
51 |
int reset;
|
52 |
int pdst;
|
53 |
int pnd0;
|
54 |
uint16_t temp_thr[2];
|
55 |
uint16_t aux_thr[2];
|
56 |
|
57 |
int tr[8]; |
58 |
}; |
59 |
|
60 |
enum {
|
61 |
TSC_MODE_XYZ_SCAN = 0x0,
|
62 |
TSC_MODE_XY_SCAN, |
63 |
TSC_MODE_X, |
64 |
TSC_MODE_Y, |
65 |
TSC_MODE_Z, |
66 |
TSC_MODE_AUX, |
67 |
TSC_MODE_TEMP1, |
68 |
TSC_MODE_TEMP2, |
69 |
TSC_MODE_AUX_SCAN, |
70 |
TSC_MODE_X_TEST, |
71 |
TSC_MODE_Y_TEST, |
72 |
TSC_MODE_TS_TEST, |
73 |
TSC_MODE_RESERVED, |
74 |
TSC_MODE_XX_DRV, |
75 |
TSC_MODE_YY_DRV, |
76 |
TSC_MODE_YX_DRV, |
77 |
}; |
78 |
|
79 |
static const uint16_t mode_regs[16] = { |
80 |
0xf000, /* X, Y, Z scan */ |
81 |
0xc000, /* X, Y scan */ |
82 |
0x8000, /* X */ |
83 |
0x4000, /* Y */ |
84 |
0x3000, /* Z */ |
85 |
0x0800, /* AUX */ |
86 |
0x0400, /* TEMP1 */ |
87 |
0x0200, /* TEMP2 */ |
88 |
0x0800, /* AUX scan */ |
89 |
0x0040, /* X test */ |
90 |
0x0020, /* Y test */ |
91 |
0x0080, /* Short-circuit test */ |
92 |
0x0000, /* Reserved */ |
93 |
0x0000, /* X+, X- drivers */ |
94 |
0x0000, /* Y+, Y- drivers */ |
95 |
0x0000, /* Y+, X- drivers */ |
96 |
}; |
97 |
|
98 |
#define X_TRANSFORM(s) \
|
99 |
((s->y * s->tr[0] - s->x * s->tr[1]) / s->tr[2] + s->tr[3]) |
100 |
#define Y_TRANSFORM(s) \
|
101 |
((s->y * s->tr[4] - s->x * s->tr[5]) / s->tr[6] + s->tr[7]) |
102 |
#define Z1_TRANSFORM(s) \
|
103 |
((400 - ((s)->x >> 7) + ((s)->pressure << 10)) << 4) |
104 |
#define Z2_TRANSFORM(s) \
|
105 |
((4000 + ((s)->y >> 7) - ((s)->pressure << 10)) << 4) |
106 |
|
107 |
#define AUX_VAL (700 << 4) /* +/- 3 at 12-bit */ |
108 |
#define TEMP1_VAL (1264 << 4) /* +/- 5 at 12-bit */ |
109 |
#define TEMP2_VAL (1531 << 4) /* +/- 5 at 12-bit */ |
110 |
|
111 |
static uint16_t tsc2005_read(struct tsc2005_state_s *s, int reg) |
112 |
{ |
113 |
uint16_t ret; |
114 |
|
115 |
switch (reg) {
|
116 |
case 0x0: /* X */ |
117 |
s->dav &= ~mode_regs[TSC_MODE_X]; |
118 |
return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
|
119 |
(s->noise & 3);
|
120 |
case 0x1: /* Y */ |
121 |
s->dav &= ~mode_regs[TSC_MODE_Y]; |
122 |
s->noise ++; |
123 |
return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
|
124 |
(s->noise & 3);
|
125 |
case 0x2: /* Z1 */ |
126 |
s->dav &= 0xdfff;
|
127 |
return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
|
128 |
(s->noise & 3);
|
129 |
case 0x3: /* Z2 */ |
130 |
s->dav &= 0xefff;
|
131 |
return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
|
132 |
(s->noise & 3);
|
133 |
|
134 |
case 0x4: /* AUX */ |
135 |
s->dav &= ~mode_regs[TSC_MODE_AUX]; |
136 |
return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
|
137 |
|
138 |
case 0x5: /* TEMP1 */ |
139 |
s->dav &= ~mode_regs[TSC_MODE_TEMP1]; |
140 |
return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
|
141 |
(s->noise & 5);
|
142 |
case 0x6: /* TEMP2 */ |
143 |
s->dav &= 0xdfff;
|
144 |
s->dav &= ~mode_regs[TSC_MODE_TEMP2]; |
145 |
return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
|
146 |
(s->noise & 3);
|
147 |
|
148 |
case 0x7: /* Status */ |
149 |
ret = s->dav | (s->reset << 7) | (s->pdst << 2) | 0x0; |
150 |
s->dav &= ~(mode_regs[TSC_MODE_X_TEST] | mode_regs[TSC_MODE_Y_TEST] | |
151 |
mode_regs[TSC_MODE_TS_TEST]); |
152 |
s->reset = 1;
|
153 |
return ret;
|
154 |
|
155 |
case 0x8: /* AUX high treshold */ |
156 |
return s->aux_thr[1]; |
157 |
case 0x9: /* AUX low treshold */ |
158 |
return s->aux_thr[0]; |
159 |
|
160 |
case 0xa: /* TEMP high treshold */ |
161 |
return s->temp_thr[1]; |
162 |
case 0xb: /* TEMP low treshold */ |
163 |
return s->temp_thr[0]; |
164 |
|
165 |
case 0xc: /* CFR0 */ |
166 |
return (s->pressure << 15) | ((!s->busy) << 14) | |
167 |
(s->nextprecision << 13) | s->timing[0]; |
168 |
case 0xd: /* CFR1 */ |
169 |
return s->timing[1]; |
170 |
case 0xe: /* CFR2 */ |
171 |
return (s->pin_func << 14) | s->filter; |
172 |
|
173 |
case 0xf: /* Function select status */ |
174 |
return s->function >= 0 ? 1 << s->function : 0; |
175 |
} |
176 |
|
177 |
/* Never gets here */
|
178 |
return 0xffff; |
179 |
} |
180 |
|
181 |
static void tsc2005_write(struct tsc2005_state_s *s, int reg, uint16_t data) |
182 |
{ |
183 |
switch (reg) {
|
184 |
case 0x8: /* AUX high treshold */ |
185 |
s->aux_thr[1] = data;
|
186 |
break;
|
187 |
case 0x9: /* AUX low treshold */ |
188 |
s->aux_thr[0] = data;
|
189 |
break;
|
190 |
|
191 |
case 0xa: /* TEMP high treshold */ |
192 |
s->temp_thr[1] = data;
|
193 |
break;
|
194 |
case 0xb: /* TEMP low treshold */ |
195 |
s->temp_thr[0] = data;
|
196 |
break;
|
197 |
|
198 |
case 0xc: /* CFR0 */ |
199 |
s->host_mode = data >> 15;
|
200 |
if (s->enabled != !(data & 0x4000)) { |
201 |
s->enabled = !(data & 0x4000);
|
202 |
fprintf(stderr, "%s: touchscreen sense %sabled\n",
|
203 |
__FUNCTION__, s->enabled ? "en" : "dis"); |
204 |
if (s->busy && !s->enabled)
|
205 |
qemu_del_timer(s->timer); |
206 |
s->busy &= s->enabled; |
207 |
} |
208 |
s->nextprecision = (data >> 13) & 1; |
209 |
s->timing[0] = data & 0x1fff; |
210 |
if ((s->timing[0] >> 11) == 3) |
211 |
fprintf(stderr, "%s: illegal conversion clock setting\n",
|
212 |
__FUNCTION__); |
213 |
break;
|
214 |
case 0xd: /* CFR1 */ |
215 |
s->timing[1] = data & 0xf07; |
216 |
break;
|
217 |
case 0xe: /* CFR2 */ |
218 |
s->pin_func = (data >> 14) & 3; |
219 |
s->filter = data & 0x3fff;
|
220 |
break;
|
221 |
|
222 |
default:
|
223 |
fprintf(stderr, "%s: write into read-only register %x\n",
|
224 |
__FUNCTION__, reg); |
225 |
} |
226 |
} |
227 |
|
228 |
/* This handles most of the chip's logic. */
|
229 |
static void tsc2005_pin_update(struct tsc2005_state_s *s) |
230 |
{ |
231 |
int64_t expires; |
232 |
int pin_state;
|
233 |
|
234 |
switch (s->pin_func) {
|
235 |
case 0: |
236 |
pin_state = !s->pressure && !!s->dav; |
237 |
break;
|
238 |
case 1: |
239 |
case 3: |
240 |
default:
|
241 |
pin_state = !s->dav; |
242 |
break;
|
243 |
case 2: |
244 |
pin_state = !s->pressure; |
245 |
} |
246 |
|
247 |
if (pin_state != s->irq) {
|
248 |
s->irq = pin_state; |
249 |
qemu_set_irq(s->pint, s->irq); |
250 |
} |
251 |
|
252 |
switch (s->nextfunction) {
|
253 |
case TSC_MODE_XYZ_SCAN:
|
254 |
case TSC_MODE_XY_SCAN:
|
255 |
if (!s->host_mode && s->dav)
|
256 |
s->enabled = 0;
|
257 |
if (!s->pressure)
|
258 |
return;
|
259 |
/* Fall through */
|
260 |
case TSC_MODE_AUX_SCAN:
|
261 |
break;
|
262 |
|
263 |
case TSC_MODE_X:
|
264 |
case TSC_MODE_Y:
|
265 |
case TSC_MODE_Z:
|
266 |
if (!s->pressure)
|
267 |
return;
|
268 |
/* Fall through */
|
269 |
case TSC_MODE_AUX:
|
270 |
case TSC_MODE_TEMP1:
|
271 |
case TSC_MODE_TEMP2:
|
272 |
case TSC_MODE_X_TEST:
|
273 |
case TSC_MODE_Y_TEST:
|
274 |
case TSC_MODE_TS_TEST:
|
275 |
if (s->dav)
|
276 |
s->enabled = 0;
|
277 |
break;
|
278 |
|
279 |
case TSC_MODE_RESERVED:
|
280 |
case TSC_MODE_XX_DRV:
|
281 |
case TSC_MODE_YY_DRV:
|
282 |
case TSC_MODE_YX_DRV:
|
283 |
default:
|
284 |
return;
|
285 |
} |
286 |
|
287 |
if (!s->enabled || s->busy)
|
288 |
return;
|
289 |
|
290 |
s->busy = 1;
|
291 |
s->precision = s->nextprecision; |
292 |
s->function = s->nextfunction; |
293 |
s->pdst = !s->pnd0; /* Synchronised on internal clock */
|
294 |
expires = qemu_get_clock(vm_clock) + (ticks_per_sec >> 7);
|
295 |
qemu_mod_timer(s->timer, expires); |
296 |
} |
297 |
|
298 |
static void tsc2005_reset(struct tsc2005_state_s *s) |
299 |
{ |
300 |
s->state = 0;
|
301 |
s->pin_func = 0;
|
302 |
s->enabled = 0;
|
303 |
s->busy = 0;
|
304 |
s->nextprecision = 0;
|
305 |
s->nextfunction = 0;
|
306 |
s->timing[0] = 0; |
307 |
s->timing[1] = 0; |
308 |
s->irq = 0;
|
309 |
s->dav = 0;
|
310 |
s->reset = 0;
|
311 |
s->pdst = 1;
|
312 |
s->pnd0 = 0;
|
313 |
s->function = -1;
|
314 |
s->temp_thr[0] = 0x000; |
315 |
s->temp_thr[1] = 0xfff; |
316 |
s->aux_thr[0] = 0x000; |
317 |
s->aux_thr[1] = 0xfff; |
318 |
|
319 |
tsc2005_pin_update(s); |
320 |
} |
321 |
|
322 |
static uint8_t tsc2005_txrx_word(void *opaque, uint8_t value) |
323 |
{ |
324 |
struct tsc2005_state_s *s = opaque;
|
325 |
uint32_t ret = 0;
|
326 |
|
327 |
switch (s->state ++) {
|
328 |
case 0: |
329 |
if (value & 0x80) { |
330 |
/* Command */
|
331 |
if (value & (1 << 1)) |
332 |
tsc2005_reset(s); |
333 |
else {
|
334 |
s->nextfunction = (value >> 3) & 0xf; |
335 |
s->nextprecision = (value >> 2) & 1; |
336 |
if (s->enabled != !(value & 1)) { |
337 |
s->enabled = !(value & 1);
|
338 |
fprintf(stderr, "%s: touchscreen sense %sabled\n",
|
339 |
__FUNCTION__, s->enabled ? "en" : "dis"); |
340 |
if (s->busy && !s->enabled)
|
341 |
qemu_del_timer(s->timer); |
342 |
s->busy &= s->enabled; |
343 |
} |
344 |
tsc2005_pin_update(s); |
345 |
} |
346 |
|
347 |
s->state = 0;
|
348 |
} else if (value) { |
349 |
/* Data transfer */
|
350 |
s->reg = (value >> 3) & 0xf; |
351 |
s->pnd0 = (value >> 1) & 1; |
352 |
s->command = value & 1;
|
353 |
|
354 |
if (s->command) {
|
355 |
/* Read */
|
356 |
s->data = tsc2005_read(s, s->reg); |
357 |
tsc2005_pin_update(s); |
358 |
} else
|
359 |
s->data = 0;
|
360 |
} else
|
361 |
s->state = 0;
|
362 |
break;
|
363 |
|
364 |
case 1: |
365 |
if (s->command)
|
366 |
ret = (s->data >> 8) & 0xff; |
367 |
else
|
368 |
s->data |= value << 8;
|
369 |
break;
|
370 |
|
371 |
case 2: |
372 |
if (s->command)
|
373 |
ret = s->data & 0xff;
|
374 |
else {
|
375 |
s->data |= value; |
376 |
tsc2005_write(s, s->reg, s->data); |
377 |
tsc2005_pin_update(s); |
378 |
} |
379 |
|
380 |
s->state = 0;
|
381 |
break;
|
382 |
} |
383 |
|
384 |
return ret;
|
385 |
} |
386 |
|
387 |
uint32_t tsc2005_txrx(void *opaque, uint32_t value, int len) |
388 |
{ |
389 |
uint32_t ret = 0;
|
390 |
|
391 |
len &= ~7;
|
392 |
while (len > 0) { |
393 |
len -= 8;
|
394 |
ret |= tsc2005_txrx_word(opaque, (value >> len) & 0xff) << len;
|
395 |
} |
396 |
|
397 |
return ret;
|
398 |
} |
399 |
|
400 |
static void tsc2005_timer_tick(void *opaque) |
401 |
{ |
402 |
struct tsc2005_state_s *s = opaque;
|
403 |
|
404 |
/* Timer ticked -- a set of conversions has been finished. */
|
405 |
|
406 |
if (!s->busy)
|
407 |
return;
|
408 |
|
409 |
s->busy = 0;
|
410 |
s->dav |= mode_regs[s->function]; |
411 |
s->function = -1;
|
412 |
tsc2005_pin_update(s); |
413 |
} |
414 |
|
415 |
static void tsc2005_touchscreen_event(void *opaque, |
416 |
int x, int y, int z, int buttons_state) |
417 |
{ |
418 |
struct tsc2005_state_s *s = opaque;
|
419 |
int p = s->pressure;
|
420 |
|
421 |
if (buttons_state) {
|
422 |
s->x = x; |
423 |
s->y = y; |
424 |
} |
425 |
s->pressure = !!buttons_state; |
426 |
|
427 |
/*
|
428 |
* Note: We would get better responsiveness in the guest by
|
429 |
* signaling TS events immediately, but for now we simulate
|
430 |
* the first conversion delay for sake of correctness.
|
431 |
*/
|
432 |
if (p != s->pressure)
|
433 |
tsc2005_pin_update(s); |
434 |
} |
435 |
|
436 |
static void tsc2005_save(QEMUFile *f, void *opaque) |
437 |
{ |
438 |
struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque; |
439 |
int i;
|
440 |
|
441 |
qemu_put_be16(f, s->x); |
442 |
qemu_put_be16(f, s->y); |
443 |
qemu_put_byte(f, s->pressure); |
444 |
|
445 |
qemu_put_byte(f, s->state); |
446 |
qemu_put_byte(f, s->reg); |
447 |
qemu_put_byte(f, s->command); |
448 |
|
449 |
qemu_put_byte(f, s->irq); |
450 |
qemu_put_be16s(f, &s->dav); |
451 |
qemu_put_be16s(f, &s->data); |
452 |
|
453 |
qemu_put_timer(f, s->timer); |
454 |
qemu_put_byte(f, s->enabled); |
455 |
qemu_put_byte(f, s->host_mode); |
456 |
qemu_put_byte(f, s->function); |
457 |
qemu_put_byte(f, s->nextfunction); |
458 |
qemu_put_byte(f, s->precision); |
459 |
qemu_put_byte(f, s->nextprecision); |
460 |
qemu_put_be16(f, s->filter); |
461 |
qemu_put_byte(f, s->pin_func); |
462 |
qemu_put_be16(f, s->timing[0]);
|
463 |
qemu_put_be16(f, s->timing[1]);
|
464 |
qemu_put_be16s(f, &s->temp_thr[0]);
|
465 |
qemu_put_be16s(f, &s->temp_thr[1]);
|
466 |
qemu_put_be16s(f, &s->aux_thr[0]);
|
467 |
qemu_put_be16s(f, &s->aux_thr[1]);
|
468 |
qemu_put_be32(f, s->noise); |
469 |
qemu_put_byte(f, s->reset); |
470 |
qemu_put_byte(f, s->pdst); |
471 |
qemu_put_byte(f, s->pnd0); |
472 |
|
473 |
for (i = 0; i < 8; i ++) |
474 |
qemu_put_be32(f, s->tr[i]); |
475 |
} |
476 |
|
477 |
static int tsc2005_load(QEMUFile *f, void *opaque, int version_id) |
478 |
{ |
479 |
struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque; |
480 |
int i;
|
481 |
|
482 |
s->x = qemu_get_be16(f); |
483 |
s->y = qemu_get_be16(f); |
484 |
s->pressure = qemu_get_byte(f); |
485 |
|
486 |
s->state = qemu_get_byte(f); |
487 |
s->reg = qemu_get_byte(f); |
488 |
s->command = qemu_get_byte(f); |
489 |
|
490 |
s->irq = qemu_get_byte(f); |
491 |
qemu_get_be16s(f, &s->dav); |
492 |
qemu_get_be16s(f, &s->data); |
493 |
|
494 |
qemu_get_timer(f, s->timer); |
495 |
s->enabled = qemu_get_byte(f); |
496 |
s->host_mode = qemu_get_byte(f); |
497 |
s->function = qemu_get_byte(f); |
498 |
s->nextfunction = qemu_get_byte(f); |
499 |
s->precision = qemu_get_byte(f); |
500 |
s->nextprecision = qemu_get_byte(f); |
501 |
s->filter = qemu_get_be16(f); |
502 |
s->pin_func = qemu_get_byte(f); |
503 |
s->timing[0] = qemu_get_be16(f);
|
504 |
s->timing[1] = qemu_get_be16(f);
|
505 |
qemu_get_be16s(f, &s->temp_thr[0]);
|
506 |
qemu_get_be16s(f, &s->temp_thr[1]);
|
507 |
qemu_get_be16s(f, &s->aux_thr[0]);
|
508 |
qemu_get_be16s(f, &s->aux_thr[1]);
|
509 |
s->noise = qemu_get_be32(f); |
510 |
s->reset = qemu_get_byte(f); |
511 |
s->pdst = qemu_get_byte(f); |
512 |
s->pnd0 = qemu_get_byte(f); |
513 |
|
514 |
for (i = 0; i < 8; i ++) |
515 |
s->tr[i] = qemu_get_be32(f); |
516 |
|
517 |
s->busy = qemu_timer_pending(s->timer); |
518 |
tsc2005_pin_update(s); |
519 |
|
520 |
return 0; |
521 |
} |
522 |
|
523 |
void *tsc2005_init(qemu_irq pintdav)
|
524 |
{ |
525 |
struct tsc2005_state_s *s;
|
526 |
|
527 |
s = (struct tsc2005_state_s *)
|
528 |
qemu_mallocz(sizeof(struct tsc2005_state_s)); |
529 |
s->x = 400;
|
530 |
s->y = 240;
|
531 |
s->pressure = 0;
|
532 |
s->precision = s->nextprecision = 0;
|
533 |
s->timer = qemu_new_timer(vm_clock, tsc2005_timer_tick, s); |
534 |
s->pint = pintdav; |
535 |
s->model = 0x2005;
|
536 |
|
537 |
s->tr[0] = 0; |
538 |
s->tr[1] = 1; |
539 |
s->tr[2] = 1; |
540 |
s->tr[3] = 0; |
541 |
s->tr[4] = 1; |
542 |
s->tr[5] = 0; |
543 |
s->tr[6] = 1; |
544 |
s->tr[7] = 0; |
545 |
|
546 |
tsc2005_reset(s); |
547 |
|
548 |
qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
|
549 |
"QEMU TSC2005-driven Touchscreen");
|
550 |
|
551 |
qemu_register_reset((void *) tsc2005_reset, s);
|
552 |
register_savevm("tsc2005", -1, 0, tsc2005_save, tsc2005_load, s); |
553 |
|
554 |
return s;
|
555 |
} |
556 |
|
557 |
/*
|
558 |
* Use tslib generated calibration data to generate ADC input values
|
559 |
* from the touchscreen. Assuming 12-bit precision was used during
|
560 |
* tslib calibration.
|
561 |
*/
|
562 |
void tsc2005_set_transform(void *opaque, struct mouse_transform_info_s *info) |
563 |
{ |
564 |
struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque; |
565 |
|
566 |
/* This version assumes touchscreen X & Y axis are parallel or
|
567 |
* perpendicular to LCD's X & Y axis in some way. */
|
568 |
if (abs(info->a[0]) > abs(info->a[1])) { |
569 |
s->tr[0] = 0; |
570 |
s->tr[1] = -info->a[6] * info->x; |
571 |
s->tr[2] = info->a[0]; |
572 |
s->tr[3] = -info->a[2] / info->a[0]; |
573 |
s->tr[4] = info->a[6] * info->y; |
574 |
s->tr[5] = 0; |
575 |
s->tr[6] = info->a[4]; |
576 |
s->tr[7] = -info->a[5] / info->a[4]; |
577 |
} else {
|
578 |
s->tr[0] = info->a[6] * info->y; |
579 |
s->tr[1] = 0; |
580 |
s->tr[2] = info->a[1]; |
581 |
s->tr[3] = -info->a[2] / info->a[1]; |
582 |
s->tr[4] = 0; |
583 |
s->tr[5] = -info->a[6] * info->x; |
584 |
s->tr[6] = info->a[3]; |
585 |
s->tr[7] = -info->a[5] / info->a[3]; |
586 |
} |
587 |
|
588 |
s->tr[0] >>= 11; |
589 |
s->tr[1] >>= 11; |
590 |
s->tr[3] <<= 4; |
591 |
s->tr[4] >>= 11; |
592 |
s->tr[5] >>= 11; |
593 |
s->tr[7] <<= 4; |
594 |
} |