4 * Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
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
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include "qemu-timer.h"
27 #define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - (p ? 12 : 10)))
29 struct tsc2005_state_s {
30 qemu_irq pint; /* Combination of the nPENIRQ and DAV signals */
37 int state, reg, irq, command;
61 TSC_MODE_XYZ_SCAN = 0x0,
79 static const uint16_t mode_regs[16] = {
80 0xf000, /* X, Y, Z scan */
81 0xc000, /* X, Y scan */
88 0x0800, /* AUX scan */
91 0x0080, /* Short-circuit test */
92 0x0000, /* Reserved */
93 0x0000, /* X+, X- drivers */
94 0x0000, /* Y+, Y- drivers */
95 0x0000, /* Y+, X- drivers */
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)
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 */
111 static uint16_t tsc2005_read(struct tsc2005_state_s *s, int reg)
117 s->dav &= ~mode_regs[TSC_MODE_X];
118 return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
121 s->dav &= ~mode_regs[TSC_MODE_Y];
123 return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
127 return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
131 return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
135 s->dav &= ~mode_regs[TSC_MODE_AUX];
136 return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
138 case 0x5: /* TEMP1 */
139 s->dav &= ~mode_regs[TSC_MODE_TEMP1];
140 return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
142 case 0x6: /* TEMP2 */
144 s->dav &= ~mode_regs[TSC_MODE_TEMP2];
145 return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
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]);
155 case 0x8: /* AUX high treshold */
156 return s->aux_thr[1];
157 case 0x9: /* AUX low treshold */
158 return s->aux_thr[0];
160 case 0xa: /* TEMP high treshold */
161 return s->temp_thr[1];
162 case 0xb: /* TEMP low treshold */
163 return s->temp_thr[0];
166 return (s->pressure << 15) | ((!s->busy) << 14) |
167 (s->nextprecision << 13) | s->timing[0];
171 return (s->pin_func << 14) | s->filter;
173 case 0xf: /* Function select status */
174 return s->function >= 0 ? 1 << s->function : 0;
177 /* Never gets here */
181 static void tsc2005_write(struct tsc2005_state_s *s, int reg, uint16_t data)
184 case 0x8: /* AUX high treshold */
185 s->aux_thr[1] = data;
187 case 0x9: /* AUX low treshold */
188 s->aux_thr[0] = data;
191 case 0xa: /* TEMP high treshold */
192 s->temp_thr[1] = data;
194 case 0xb: /* TEMP low treshold */
195 s->temp_thr[0] = data;
199 s->host_mode = data >> 15;
200 s->enabled = !(data & 0x4000);
201 if (s->busy && !s->enabled)
202 qemu_del_timer(s->timer);
203 s->busy &= s->enabled;
204 s->nextprecision = (data >> 13) & 1;
205 s->timing[0] = data & 0x1fff;
206 if ((s->timing[0] >> 11) == 3)
207 fprintf(stderr, "%s: illegal conversion clock setting\n",
211 s->timing[1] = data & 0xf07;
214 s->pin_func = (data >> 14) & 3;
215 s->filter = data & 0x3fff;
219 fprintf(stderr, "%s: write into read-only register %x\n",
224 /* This handles most of the chip's logic. */
225 static void tsc2005_pin_update(struct tsc2005_state_s *s)
230 switch (s->pin_func) {
232 pin_state = !s->pressure && !!s->dav;
240 pin_state = !s->pressure;
243 if (pin_state != s->irq) {
245 qemu_set_irq(s->pint, s->irq);
248 switch (s->nextfunction) {
249 case TSC_MODE_XYZ_SCAN:
250 case TSC_MODE_XY_SCAN:
251 if (!s->host_mode && s->dav)
256 case TSC_MODE_AUX_SCAN:
268 case TSC_MODE_X_TEST:
269 case TSC_MODE_Y_TEST:
270 case TSC_MODE_TS_TEST:
275 case TSC_MODE_RESERVED:
276 case TSC_MODE_XX_DRV:
277 case TSC_MODE_YY_DRV:
278 case TSC_MODE_YX_DRV:
283 if (!s->enabled || s->busy)
287 s->precision = s->nextprecision;
288 s->function = s->nextfunction;
289 s->pdst = !s->pnd0; /* Synchronised on internal clock */
290 expires = qemu_get_clock(vm_clock) + (ticks_per_sec >> 7);
291 qemu_mod_timer(s->timer, expires);
294 static void tsc2005_reset(struct tsc2005_state_s *s)
300 s->nextprecision = 0;
310 s->temp_thr[0] = 0x000;
311 s->temp_thr[1] = 0xfff;
312 s->aux_thr[0] = 0x000;
313 s->aux_thr[1] = 0xfff;
315 tsc2005_pin_update(s);
318 uint8_t tsc2005_txrx_word(void *opaque, uint8_t value)
320 struct tsc2005_state_s *s = opaque;
323 switch (s->state ++) {
327 if (value & (1 << 1))
330 s->nextfunction = (value >> 3) & 0xf;
331 s->nextprecision = (value >> 2) & 1;
332 if (s->enabled != !(value & 1)) {
333 s->enabled = !(value & 1);
334 fprintf(stderr, "%s: touchscreen sense %sabled\n",
335 __FUNCTION__, s->enabled ? "en" : "dis");
336 if (s->busy && !s->enabled)
337 qemu_del_timer(s->timer);
338 s->busy &= s->enabled;
340 tsc2005_pin_update(s);
346 s->reg = (value >> 3) & 0xf;
347 s->pnd0 = (value >> 1) & 1;
348 s->command = value & 1;
352 s->data = tsc2005_read(s, s->reg);
353 tsc2005_pin_update(s);
362 ret = (s->data >> 8) & 0xff;
364 s->data |= value << 8;
369 ret = s->data & 0xff;
372 tsc2005_write(s, s->reg, s->data);
373 tsc2005_pin_update(s);
383 uint32_t tsc2005_txrx(void *opaque, uint32_t value, int len)
390 ret |= tsc2005_txrx_word(opaque, (value >> len) & 0xff) << len;
396 static void tsc2005_timer_tick(void *opaque)
398 struct tsc2005_state_s *s = opaque;
400 /* Timer ticked -- a set of conversions has been finished. */
406 s->dav |= mode_regs[s->function];
408 tsc2005_pin_update(s);
411 static void tsc2005_touchscreen_event(void *opaque,
412 int x, int y, int z, int buttons_state)
414 struct tsc2005_state_s *s = opaque;
421 s->pressure = !!buttons_state;
424 * Note: We would get better responsiveness in the guest by
425 * signaling TS events immediately, but for now we simulate
426 * the first conversion delay for sake of correctness.
428 if (p != s->pressure)
429 tsc2005_pin_update(s);
432 static void tsc2005_save(QEMUFile *f, void *opaque)
434 struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque;
437 qemu_put_be16(f, s->x);
438 qemu_put_be16(f, s->y);
439 qemu_put_byte(f, s->pressure);
441 qemu_put_byte(f, s->state);
442 qemu_put_byte(f, s->reg);
443 qemu_put_byte(f, s->command);
445 qemu_put_byte(f, s->irq);
446 qemu_put_be16s(f, &s->dav);
447 qemu_put_be16s(f, &s->data);
449 qemu_put_timer(f, s->timer);
450 qemu_put_byte(f, s->enabled);
451 qemu_put_byte(f, s->host_mode);
452 qemu_put_byte(f, s->function);
453 qemu_put_byte(f, s->nextfunction);
454 qemu_put_byte(f, s->precision);
455 qemu_put_byte(f, s->nextprecision);
456 qemu_put_be16(f, s->filter);
457 qemu_put_byte(f, s->pin_func);
458 qemu_put_be16(f, s->timing[0]);
459 qemu_put_be16(f, s->timing[1]);
460 qemu_put_be16s(f, &s->temp_thr[0]);
461 qemu_put_be16s(f, &s->temp_thr[1]);
462 qemu_put_be16s(f, &s->aux_thr[0]);
463 qemu_put_be16s(f, &s->aux_thr[1]);
464 qemu_put_be32(f, s->noise);
465 qemu_put_byte(f, s->reset);
466 qemu_put_byte(f, s->pdst);
467 qemu_put_byte(f, s->pnd0);
469 for (i = 0; i < 8; i ++)
470 qemu_put_be32(f, s->tr[i]);
473 static int tsc2005_load(QEMUFile *f, void *opaque, int version_id)
475 struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque;
478 s->x = qemu_get_be16(f);
479 s->y = qemu_get_be16(f);
480 s->pressure = qemu_get_byte(f);
482 s->state = qemu_get_byte(f);
483 s->reg = qemu_get_byte(f);
484 s->command = qemu_get_byte(f);
486 s->irq = qemu_get_byte(f);
487 qemu_get_be16s(f, &s->dav);
488 qemu_get_be16s(f, &s->data);
490 qemu_get_timer(f, s->timer);
491 s->enabled = qemu_get_byte(f);
492 s->host_mode = qemu_get_byte(f);
493 s->function = qemu_get_byte(f);
494 s->nextfunction = qemu_get_byte(f);
495 s->precision = qemu_get_byte(f);
496 s->nextprecision = qemu_get_byte(f);
497 s->filter = qemu_get_be16(f);
498 s->pin_func = qemu_get_byte(f);
499 s->timing[0] = qemu_get_be16(f);
500 s->timing[1] = qemu_get_be16(f);
501 qemu_get_be16s(f, &s->temp_thr[0]);
502 qemu_get_be16s(f, &s->temp_thr[1]);
503 qemu_get_be16s(f, &s->aux_thr[0]);
504 qemu_get_be16s(f, &s->aux_thr[1]);
505 s->noise = qemu_get_be32(f);
506 s->reset = qemu_get_byte(f);
507 s->pdst = qemu_get_byte(f);
508 s->pnd0 = qemu_get_byte(f);
510 for (i = 0; i < 8; i ++)
511 s->tr[i] = qemu_get_be32(f);
513 s->busy = qemu_timer_pending(s->timer);
514 tsc2005_pin_update(s);
519 static int tsc2005_iid = 0;
521 void *tsc2005_init(qemu_irq pintdav)
523 struct tsc2005_state_s *s;
525 s = (struct tsc2005_state_s *)
526 qemu_mallocz(sizeof(struct tsc2005_state_s));
530 s->precision = s->nextprecision = 0;
531 s->timer = qemu_new_timer(vm_clock, tsc2005_timer_tick, s);
546 qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
547 "QEMU TSC2005-driven Touchscreen");
549 qemu_register_reset((void *) tsc2005_reset, s);
550 register_savevm("tsc2005", tsc2005_iid ++, 0,
551 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, struct mouse_transform_info_s *info)
563 struct tsc2005_state_s *s = (struct tsc2005_state_s *) 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];