5 * Copyright (C) 2008 Nokia Corporation
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.
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.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "qemu/timer.h"
23 #include "ui/console.h"
24 #include "hw/devices.h"
26 #define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - (p ? 12 : 10)))
29 qemu_irq pint; /* Combination of the nPENIRQ and DAV signals */
36 int state, reg, irq, command;
60 TSC_MODE_XYZ_SCAN = 0x0,
78 static const uint16_t mode_regs[16] = {
79 0xf000, /* X, Y, Z scan */
80 0xc000, /* X, Y scan */
87 0x0800, /* AUX scan */
90 0x0080, /* Short-circuit test */
91 0x0000, /* Reserved */
92 0x0000, /* X+, X- drivers */
93 0x0000, /* Y+, Y- drivers */
94 0x0000, /* Y+, X- drivers */
97 #define X_TRANSFORM(s) \
98 ((s->y * s->tr[0] - s->x * s->tr[1]) / s->tr[2] + s->tr[3])
99 #define Y_TRANSFORM(s) \
100 ((s->y * s->tr[4] - s->x * s->tr[5]) / s->tr[6] + s->tr[7])
101 #define Z1_TRANSFORM(s) \
102 ((400 - ((s)->x >> 7) + ((s)->pressure << 10)) << 4)
103 #define Z2_TRANSFORM(s) \
104 ((4000 + ((s)->y >> 7) - ((s)->pressure << 10)) << 4)
106 #define AUX_VAL (700 << 4) /* +/- 3 at 12-bit */
107 #define TEMP1_VAL (1264 << 4) /* +/- 5 at 12-bit */
108 #define TEMP2_VAL (1531 << 4) /* +/- 5 at 12-bit */
110 static uint16_t tsc2005_read(TSC2005State *s, int reg)
116 s->dav &= ~mode_regs[TSC_MODE_X];
117 return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
120 s->dav &= ~mode_regs[TSC_MODE_Y];
122 return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
126 return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
130 return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
134 s->dav &= ~mode_regs[TSC_MODE_AUX];
135 return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
137 case 0x5: /* TEMP1 */
138 s->dav &= ~mode_regs[TSC_MODE_TEMP1];
139 return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
141 case 0x6: /* TEMP2 */
143 s->dav &= ~mode_regs[TSC_MODE_TEMP2];
144 return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
147 case 0x7: /* Status */
148 ret = s->dav | (s->reset << 7) | (s->pdst << 2) | 0x0;
149 s->dav &= ~(mode_regs[TSC_MODE_X_TEST] | mode_regs[TSC_MODE_Y_TEST] |
150 mode_regs[TSC_MODE_TS_TEST]);
154 case 0x8: /* AUX high treshold */
155 return s->aux_thr[1];
156 case 0x9: /* AUX low treshold */
157 return s->aux_thr[0];
159 case 0xa: /* TEMP high treshold */
160 return s->temp_thr[1];
161 case 0xb: /* TEMP low treshold */
162 return s->temp_thr[0];
165 return (s->pressure << 15) | ((!s->busy) << 14) |
166 (s->nextprecision << 13) | s->timing[0];
170 return (s->pin_func << 14) | s->filter;
172 case 0xf: /* Function select status */
173 return s->function >= 0 ? 1 << s->function : 0;
176 /* Never gets here */
180 static void tsc2005_write(TSC2005State *s, int reg, uint16_t data)
183 case 0x8: /* AUX high treshold */
184 s->aux_thr[1] = data;
186 case 0x9: /* AUX low treshold */
187 s->aux_thr[0] = data;
190 case 0xa: /* TEMP high treshold */
191 s->temp_thr[1] = data;
193 case 0xb: /* TEMP low treshold */
194 s->temp_thr[0] = data;
198 s->host_mode = data >> 15;
199 if (s->enabled != !(data & 0x4000)) {
200 s->enabled = !(data & 0x4000);
201 fprintf(stderr, "%s: touchscreen sense %sabled\n",
202 __FUNCTION__, s->enabled ? "en" : "dis");
203 if (s->busy && !s->enabled)
204 qemu_del_timer(s->timer);
205 s->busy &= s->enabled;
207 s->nextprecision = (data >> 13) & 1;
208 s->timing[0] = data & 0x1fff;
209 if ((s->timing[0] >> 11) == 3)
210 fprintf(stderr, "%s: illegal conversion clock setting\n",
214 s->timing[1] = data & 0xf07;
217 s->pin_func = (data >> 14) & 3;
218 s->filter = data & 0x3fff;
222 fprintf(stderr, "%s: write into read-only register %x\n",
227 /* This handles most of the chip's logic. */
228 static void tsc2005_pin_update(TSC2005State *s)
233 switch (s->pin_func) {
235 pin_state = !s->pressure && !!s->dav;
243 pin_state = !s->pressure;
246 if (pin_state != s->irq) {
248 qemu_set_irq(s->pint, s->irq);
251 switch (s->nextfunction) {
252 case TSC_MODE_XYZ_SCAN:
253 case TSC_MODE_XY_SCAN:
254 if (!s->host_mode && s->dav)
259 case TSC_MODE_AUX_SCAN:
271 case TSC_MODE_X_TEST:
272 case TSC_MODE_Y_TEST:
273 case TSC_MODE_TS_TEST:
278 case TSC_MODE_RESERVED:
279 case TSC_MODE_XX_DRV:
280 case TSC_MODE_YY_DRV:
281 case TSC_MODE_YX_DRV:
286 if (!s->enabled || s->busy)
290 s->precision = s->nextprecision;
291 s->function = s->nextfunction;
292 s->pdst = !s->pnd0; /* Synchronised on internal clock */
293 expires = qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() >> 7);
294 qemu_mod_timer(s->timer, expires);
297 static void tsc2005_reset(TSC2005State *s)
303 s->nextprecision = 0;
313 s->temp_thr[0] = 0x000;
314 s->temp_thr[1] = 0xfff;
315 s->aux_thr[0] = 0x000;
316 s->aux_thr[1] = 0xfff;
318 tsc2005_pin_update(s);
321 static uint8_t tsc2005_txrx_word(void *opaque, uint8_t value)
323 TSC2005State *s = opaque;
326 switch (s->state ++) {
330 if (value & (1 << 1))
333 s->nextfunction = (value >> 3) & 0xf;
334 s->nextprecision = (value >> 2) & 1;
335 if (s->enabled != !(value & 1)) {
336 s->enabled = !(value & 1);
337 fprintf(stderr, "%s: touchscreen sense %sabled\n",
338 __FUNCTION__, s->enabled ? "en" : "dis");
339 if (s->busy && !s->enabled)
340 qemu_del_timer(s->timer);
341 s->busy &= s->enabled;
343 tsc2005_pin_update(s);
349 s->reg = (value >> 3) & 0xf;
350 s->pnd0 = (value >> 1) & 1;
351 s->command = value & 1;
355 s->data = tsc2005_read(s, s->reg);
356 tsc2005_pin_update(s);
365 ret = (s->data >> 8) & 0xff;
367 s->data |= value << 8;
372 ret = s->data & 0xff;
375 tsc2005_write(s, s->reg, s->data);
376 tsc2005_pin_update(s);
386 uint32_t tsc2005_txrx(void *opaque, uint32_t value, int len)
393 ret |= tsc2005_txrx_word(opaque, (value >> len) & 0xff) << len;
399 static void tsc2005_timer_tick(void *opaque)
401 TSC2005State *s = opaque;
403 /* Timer ticked -- a set of conversions has been finished. */
409 s->dav |= mode_regs[s->function];
411 tsc2005_pin_update(s);
414 static void tsc2005_touchscreen_event(void *opaque,
415 int x, int y, int z, int buttons_state)
417 TSC2005State *s = opaque;
424 s->pressure = !!buttons_state;
427 * Note: We would get better responsiveness in the guest by
428 * signaling TS events immediately, but for now we simulate
429 * the first conversion delay for sake of correctness.
431 if (p != s->pressure)
432 tsc2005_pin_update(s);
435 static void tsc2005_save(QEMUFile *f, void *opaque)
437 TSC2005State *s = (TSC2005State *) opaque;
440 qemu_put_be16(f, s->x);
441 qemu_put_be16(f, s->y);
442 qemu_put_byte(f, s->pressure);
444 qemu_put_byte(f, s->state);
445 qemu_put_byte(f, s->reg);
446 qemu_put_byte(f, s->command);
448 qemu_put_byte(f, s->irq);
449 qemu_put_be16s(f, &s->dav);
450 qemu_put_be16s(f, &s->data);
452 qemu_put_timer(f, s->timer);
453 qemu_put_byte(f, s->enabled);
454 qemu_put_byte(f, s->host_mode);
455 qemu_put_byte(f, s->function);
456 qemu_put_byte(f, s->nextfunction);
457 qemu_put_byte(f, s->precision);
458 qemu_put_byte(f, s->nextprecision);
459 qemu_put_be16(f, s->filter);
460 qemu_put_byte(f, s->pin_func);
461 qemu_put_be16(f, s->timing[0]);
462 qemu_put_be16(f, s->timing[1]);
463 qemu_put_be16s(f, &s->temp_thr[0]);
464 qemu_put_be16s(f, &s->temp_thr[1]);
465 qemu_put_be16s(f, &s->aux_thr[0]);
466 qemu_put_be16s(f, &s->aux_thr[1]);
467 qemu_put_be32(f, s->noise);
468 qemu_put_byte(f, s->reset);
469 qemu_put_byte(f, s->pdst);
470 qemu_put_byte(f, s->pnd0);
472 for (i = 0; i < 8; i ++)
473 qemu_put_be32(f, s->tr[i]);
476 static int tsc2005_load(QEMUFile *f, void *opaque, int version_id)
478 TSC2005State *s = (TSC2005State *) opaque;
481 s->x = qemu_get_be16(f);
482 s->y = qemu_get_be16(f);
483 s->pressure = qemu_get_byte(f);
485 s->state = qemu_get_byte(f);
486 s->reg = qemu_get_byte(f);
487 s->command = qemu_get_byte(f);
489 s->irq = qemu_get_byte(f);
490 qemu_get_be16s(f, &s->dav);
491 qemu_get_be16s(f, &s->data);
493 qemu_get_timer(f, s->timer);
494 s->enabled = qemu_get_byte(f);
495 s->host_mode = qemu_get_byte(f);
496 s->function = qemu_get_byte(f);
497 s->nextfunction = qemu_get_byte(f);
498 s->precision = qemu_get_byte(f);
499 s->nextprecision = qemu_get_byte(f);
500 s->filter = qemu_get_be16(f);
501 s->pin_func = qemu_get_byte(f);
502 s->timing[0] = qemu_get_be16(f);
503 s->timing[1] = qemu_get_be16(f);
504 qemu_get_be16s(f, &s->temp_thr[0]);
505 qemu_get_be16s(f, &s->temp_thr[1]);
506 qemu_get_be16s(f, &s->aux_thr[0]);
507 qemu_get_be16s(f, &s->aux_thr[1]);
508 s->noise = qemu_get_be32(f);
509 s->reset = qemu_get_byte(f);
510 s->pdst = qemu_get_byte(f);
511 s->pnd0 = qemu_get_byte(f);
513 for (i = 0; i < 8; i ++)
514 s->tr[i] = qemu_get_be32(f);
516 s->busy = qemu_timer_pending(s->timer);
517 tsc2005_pin_update(s);
522 void *tsc2005_init(qemu_irq pintdav)
527 g_malloc0(sizeof(TSC2005State));
531 s->precision = s->nextprecision = 0;
532 s->timer = qemu_new_timer_ns(vm_clock, tsc2005_timer_tick, s);
547 qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
548 "QEMU TSC2005-driven Touchscreen");
550 qemu_register_reset((void *) tsc2005_reset, s);
551 register_savevm(NULL, "tsc2005", -1, 0, tsc2005_save, tsc2005_load, s);
557 * Use tslib generated calibration data to generate ADC input values
558 * from the touchscreen. Assuming 12-bit precision was used during
561 void tsc2005_set_transform(void *opaque, MouseTransformInfo *info)
563 TSC2005State *s = (TSC2005State *) opaque;
565 /* This version assumes touchscreen X & Y axis are parallel or
566 * perpendicular to LCD's X & Y axis in some way. */
567 if (abs(info->a[0]) > abs(info->a[1])) {
569 s->tr[1] = -info->a[6] * info->x;
570 s->tr[2] = info->a[0];
571 s->tr[3] = -info->a[2] / info->a[0];
572 s->tr[4] = info->a[6] * info->y;
574 s->tr[6] = info->a[4];
575 s->tr[7] = -info->a[5] / info->a[4];
577 s->tr[0] = info->a[6] * info->y;
579 s->tr[2] = info->a[1];
580 s->tr[3] = -info->a[2] / info->a[1];
582 s->tr[5] = -info->a[6] * info->x;
583 s->tr[6] = info->a[3];
584 s->tr[7] = -info->a[5] / info->a[3];