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"
28 #define TSC_DATA_REGISTERS_PAGE 0x0
29 #define TSC_CONTROL_REGISTERS_PAGE 0x1
30 #define TSC_AUDIO_REGISTERS_PAGE 0x2
34 #define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - (p ? 12 : 10)))
36 struct tsc2005_state_s {
37 qemu_irq pint; /* Combination of the nPENIRQ and DAV signals */
44 int state, reg, irq, command;
68 TSC_MODE_XYZ_SCAN = 0x0,
86 static const uint16_t mode_regs[16] = {
87 0xf000, /* X, Y, Z scan */
88 0xc000, /* X, Y scan */
95 0x0800, /* AUX scan */
98 0x0080, /* Short-circuit test */
99 0x0000, /* Reserved */
100 0x0000, /* X+, X- drivers */
101 0x0000, /* Y+, Y- drivers */
102 0x0000, /* Y+, X- drivers */
105 #define X_TRANSFORM(s) \
106 ((s->y * s->tr[0] - s->x * s->tr[1]) / s->tr[2] + s->tr[3])
107 #define Y_TRANSFORM(s) \
108 ((s->y * s->tr[4] - s->x * s->tr[5]) / s->tr[6] + s->tr[7])
109 #define Z1_TRANSFORM(s) \
110 ((400 - ((s)->x >> 7) + ((s)->pressure << 10)) << 4)
111 #define Z2_TRANSFORM(s) \
112 ((4000 + ((s)->y >> 7) - ((s)->pressure << 10)) << 4)
114 #define AUX_VAL (700 << 4) /* +/- 3 at 12-bit */
115 #define TEMP1_VAL (1264 << 4) /* +/- 5 at 12-bit */
116 #define TEMP2_VAL (1531 << 4) /* +/- 5 at 12-bit */
118 #define TSC_POWEROFF_DELAY 50
119 #define TSC_SOFTSTEP_DELAY 50
121 static uint16_t tsc2005_read(struct tsc2005_state_s *s, int reg)
127 s->dav &= ~mode_regs[TSC_MODE_X];
128 return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
131 s->dav &= ~mode_regs[TSC_MODE_Y];
133 return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
137 return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
141 return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
145 s->dav &= ~mode_regs[TSC_MODE_AUX];
146 return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
148 case 0x5: /* TEMP1 */
149 s->dav &= ~mode_regs[TSC_MODE_TEMP1];
150 return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
152 case 0x6: /* TEMP2 */
154 s->dav &= ~mode_regs[TSC_MODE_TEMP2];
155 return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
158 case 0x7: /* Status */
159 ret = s->dav | (s->reset << 7) | (s->pdst << 2) | 0x0;
160 s->dav &= ~(mode_regs[TSC_MODE_X_TEST] | mode_regs[TSC_MODE_Y_TEST] |
161 mode_regs[TSC_MODE_TS_TEST]);
165 case 0x8: /* AUX high treshold */
166 return s->aux_thr[1];
167 case 0x9: /* AUX low treshold */
168 return s->aux_thr[0];
170 case 0xa: /* TEMP high treshold */
171 return s->temp_thr[1];
172 case 0xb: /* TEMP low treshold */
173 return s->temp_thr[0];
176 return (s->pressure << 15) | ((!s->busy) << 14) |
177 (s->nextprecision << 13) | s->timing[0];
181 return (s->pin_func << 14) | s->filter;
183 case 0xf: /* Function select status */
184 return s->function >= 0 ? 1 << s->function : 0;
187 /* Never gets here */
191 static void tsc2005_write(struct tsc2005_state_s *s, int reg, uint16_t data)
194 case 0x8: /* AUX high treshold */
195 s->aux_thr[1] = data;
197 case 0x9: /* AUX low treshold */
198 s->aux_thr[0] = data;
201 case 0xa: /* TEMP high treshold */
202 s->temp_thr[1] = data;
204 case 0xb: /* TEMP low treshold */
205 s->temp_thr[0] = data;
209 s->host_mode = data >> 15;
210 s->enabled = !(data & 0x4000);
211 if (s->busy && !s->enabled)
212 qemu_del_timer(s->timer);
213 s->busy &= s->enabled;
214 s->nextprecision = (data >> 13) & 1;
215 s->timing[0] = data & 0x1fff;
216 if ((s->timing[0] >> 11) == 3)
217 fprintf(stderr, "%s: illegal conversion clock setting\n",
221 s->timing[1] = data & 0xf07;
224 s->pin_func = (data >> 14) & 3;
225 s->filter = data & 0x3fff;
229 fprintf(stderr, "%s: write into read-only register %x\n",
234 /* This handles most of the chip's logic. */
235 static void tsc2005_pin_update(struct tsc2005_state_s *s)
240 switch (s->pin_func) {
242 pin_state = !s->pressure && !!s->dav;
250 pin_state = !s->pressure;
256 if (pin_state != s->irq) {
258 qemu_set_irq(s->pint, s->irq);
261 switch (s->nextfunction) {
262 case TSC_MODE_XYZ_SCAN:
263 case TSC_MODE_XY_SCAN:
267 case TSC_MODE_AUX_SCAN:
279 case TSC_MODE_X_TEST:
280 case TSC_MODE_Y_TEST:
281 case TSC_MODE_TS_TEST:
286 case TSC_MODE_RESERVED:
287 case TSC_MODE_XX_DRV:
288 case TSC_MODE_YY_DRV:
289 case TSC_MODE_YX_DRV:
294 if (!s->enabled || s->busy)
298 s->precision = s->nextprecision;
299 s->function = s->nextfunction;
300 s->pdst = !s->pnd0; /* Synchronised on internal clock */
301 expires = qemu_get_clock(vm_clock) + (ticks_per_sec >> 7);
302 qemu_mod_timer(s->timer, expires);
305 static void tsc2005_reset(struct tsc2005_state_s *s)
311 s->nextprecision = 0;
321 s->temp_thr[0] = 0x000;
322 s->temp_thr[1] = 0xfff;
323 s->aux_thr[0] = 0x000;
324 s->aux_thr[1] = 0xfff;
326 tsc2005_pin_update(s);
329 uint8_t tsc2005_txrx_word(void *opaque, uint8_t value)
331 struct tsc2005_state_s *s = opaque;
334 switch (s->state ++) {
338 if (value & (1 << 1))
341 s->nextfunction = (value >> 3) & 0xf;
342 s->nextprecision = (value >> 2) & 1;
343 if (s->enabled != !(value & 1)) {
344 s->enabled = !(value & 1);
345 fprintf(stderr, "%s: touchscreen sense %sabled\n",
346 __FUNCTION__, s->enabled ? "en" : "dis");
348 tsc2005_pin_update(s);
354 s->reg = (value >> 3) & 0xf;
355 s->pnd0 = (value >> 1) & 1;
356 s->command = value & 1;
360 s->data = tsc2005_read(s, s->reg);
361 tsc2005_pin_update(s);
370 ret = (s->data >> 8) & 0xff;
372 s->data |= value << 8;
377 ret = s->data & 0xff;
380 tsc2005_write(s, s->reg, s->data);
381 tsc2005_pin_update(s);
391 uint32_t tsc2005_txrx(void *opaque, uint32_t value, int len)
398 ret |= tsc2005_txrx_word(opaque, (value >> len) & 0xff) << len;
404 static void tsc2005_timer_tick(void *opaque)
406 struct tsc2005_state_s *s = opaque;
408 /* Timer ticked -- a set of conversions has been finished. */
414 s->dav |= mode_regs[s->function];
416 tsc2005_pin_update(s);
419 static void tsc2005_touchscreen_event(void *opaque,
420 int x, int y, int z, int buttons_state)
422 struct tsc2005_state_s *s = opaque;
429 s->pressure = !!buttons_state;
432 * Note: We would get better responsiveness in the guest by
433 * signaling TS events immediately, but for now we simulate
434 * the first conversion delay for sake of correctness.
436 if (p != s->pressure)
437 tsc2005_pin_update(s);
440 static void tsc2005_save(QEMUFile *f, void *opaque)
442 struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque;
445 qemu_put_be16(f, s->x);
446 qemu_put_be16(f, s->y);
447 qemu_put_byte(f, s->pressure);
449 qemu_put_byte(f, s->state);
450 qemu_put_byte(f, s->reg);
451 qemu_put_byte(f, s->command);
453 qemu_put_byte(f, s->irq);
454 qemu_put_be16s(f, &s->dav);
455 qemu_put_be16s(f, &s->data);
457 qemu_put_timer(f, s->timer);
458 qemu_put_byte(f, s->enabled);
459 qemu_put_byte(f, s->host_mode);
460 qemu_put_byte(f, s->function);
461 qemu_put_byte(f, s->nextfunction);
462 qemu_put_byte(f, s->precision);
463 qemu_put_byte(f, s->nextprecision);
464 qemu_put_be16(f, s->filter);
465 qemu_put_byte(f, s->pin_func);
466 qemu_put_be16(f, s->timing[0]);
467 qemu_put_be16(f, s->timing[1]);
468 qemu_put_be16s(f, &s->temp_thr[0]);
469 qemu_put_be16s(f, &s->temp_thr[1]);
470 qemu_put_be16s(f, &s->aux_thr[0]);
471 qemu_put_be16s(f, &s->aux_thr[1]);
472 qemu_put_be32(f, s->noise);
473 qemu_put_byte(f, s->reset);
474 qemu_put_byte(f, s->pdst);
475 qemu_put_byte(f, s->pnd0);
477 for (i = 0; i < 8; i ++)
478 qemu_put_be32(f, s->tr[i]);
481 static int tsc2005_load(QEMUFile *f, void *opaque, int version_id)
483 struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque;
486 s->x = qemu_get_be16(f);
487 s->y = qemu_get_be16(f);
488 s->pressure = qemu_get_byte(f);
490 s->state = qemu_get_byte(f);
491 s->reg = qemu_get_byte(f);
492 s->command = qemu_get_byte(f);
494 s->irq = qemu_get_byte(f);
495 qemu_get_be16s(f, &s->dav);
496 qemu_get_be16s(f, &s->data);
498 qemu_get_timer(f, s->timer);
499 s->enabled = qemu_get_byte(f);
500 s->host_mode = qemu_get_byte(f);
501 s->function = qemu_get_byte(f);
502 s->nextfunction = qemu_get_byte(f);
503 s->precision = qemu_get_byte(f);
504 s->nextprecision = qemu_get_byte(f);
505 s->filter = qemu_get_be16(f);
506 s->pin_func = qemu_get_byte(f);
507 s->timing[0] = qemu_get_be16(f);
508 s->timing[1] = qemu_get_be16(f);
509 qemu_get_be16s(f, &s->temp_thr[0]);
510 qemu_get_be16s(f, &s->temp_thr[1]);
511 qemu_get_be16s(f, &s->aux_thr[0]);
512 qemu_get_be16s(f, &s->aux_thr[1]);
513 s->noise = qemu_get_be32(f);
514 s->reset = qemu_get_byte(f);
515 s->pdst = qemu_get_byte(f);
516 s->pnd0 = qemu_get_byte(f);
518 for (i = 0; i < 8; i ++)
519 s->tr[i] = qemu_get_be32(f);
521 s->busy = qemu_timer_pending(s->timer);
522 tsc2005_pin_update(s);
527 static int tsc2005_iid = 0;
529 void *tsc2005_init(qemu_irq pintdav)
531 struct tsc2005_state_s *s;
533 s = (struct tsc2005_state_s *)
534 qemu_mallocz(sizeof(struct tsc2005_state_s));
538 s->precision = s->nextprecision = 0;
539 s->timer = qemu_new_timer(vm_clock, tsc2005_timer_tick, s);
554 qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
555 "QEMU TSC2005-driven Touchscreen");
557 qemu_register_reset((void *) tsc2005_reset, s);
558 register_savevm("tsc2005", tsc2005_iid ++, 0,
559 tsc2005_save, tsc2005_load, s);
565 * Use tslib generated calibration data to generate ADC input values
566 * from the touchscreen. Assuming 12-bit precision was used during
569 void tsc2005_set_transform(void *opaque, struct mouse_transform_info_s *info)
571 struct tsc2005_state_s *s = (struct tsc2005_state_s *) opaque;
573 /* This version assumes touchscreen X & Y axis are parallel or
574 * perpendicular to LCD's X & Y axis in some way. */
575 if (abs(info->a[0]) > abs(info->a[1])) {
577 s->tr[1] = -info->a[6] * info->x;
578 s->tr[2] = info->a[0];
579 s->tr[3] = -info->a[2] / info->a[0];
580 s->tr[4] = info->a[6] * info->y;
582 s->tr[6] = info->a[4];
583 s->tr[7] = -info->a[5] / info->a[4];
585 s->tr[0] = info->a[6] * info->y;
587 s->tr[2] = info->a[1];
588 s->tr[3] = -info->a[2] / info->a[1];
590 s->tr[5] = -info->a[6] * info->x;
591 s->tr[6] = info->a[3];
592 s->tr[7] = -info->a[5] / info->a[3];