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/>.
21 #include "qemu/osdep.h"
24 #include "qemu/timer.h"
25 #include "ui/console.h"
26 #include "hw/input/tsc2xxx.h"
29 #define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - (p ? 12 : 10)))
32 qemu_irq pint; /* Combination of the nPENIRQ and DAV signals */
64 TSC_MODE_XYZ_SCAN = 0x0,
82 static const uint16_t mode_regs[16] = {
83 0xf000, /* X, Y, Z scan */
84 0xc000, /* X, Y scan */
91 0x0800, /* AUX scan */
94 0x0080, /* Short-circuit test */
95 0x0000, /* Reserved */
96 0x0000, /* X+, X- drivers */
97 0x0000, /* Y+, Y- drivers */
98 0x0000, /* Y+, X- drivers */
101 #define X_TRANSFORM(s) \
102 ((s->y * s->tr[0] - s->x * s->tr[1]) / s->tr[2] + s->tr[3])
103 #define Y_TRANSFORM(s) \
104 ((s->y * s->tr[4] - s->x * s->tr[5]) / s->tr[6] + s->tr[7])
105 #define Z1_TRANSFORM(s) \
106 ((400 - ((s)->x >> 7) + ((s)->pressure << 10)) << 4)
107 #define Z2_TRANSFORM(s) \
108 ((4000 + ((s)->y >> 7) - ((s)->pressure << 10)) << 4)
110 #define AUX_VAL (700 << 4) /* +/- 3 at 12-bit */
111 #define TEMP1_VAL (1264 << 4) /* +/- 5 at 12-bit */
112 #define TEMP2_VAL (1531 << 4) /* +/- 5 at 12-bit */
114 static uint16_t tsc2005_read(TSC2005State *s, int reg)
120 s->dav &= ~mode_regs[TSC_MODE_X];
121 return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
124 s->dav &= ~mode_regs[TSC_MODE_Y];
126 return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
130 return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
134 return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
138 s->dav &= ~mode_regs[TSC_MODE_AUX];
139 return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
141 case 0x5: /* TEMP1 */
142 s->dav &= ~mode_regs[TSC_MODE_TEMP1];
143 return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
145 case 0x6: /* TEMP2 */
147 s->dav &= ~mode_regs[TSC_MODE_TEMP2];
148 return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
151 case 0x7: /* Status */
152 ret = s->dav | (s->reset << 7) | (s->pdst << 2) | 0x0;
153 s->dav &= ~(mode_regs[TSC_MODE_X_TEST] | mode_regs[TSC_MODE_Y_TEST] |
154 mode_regs[TSC_MODE_TS_TEST]);
158 case 0x8: /* AUX high treshold */
159 return s->aux_thr[1];
160 case 0x9: /* AUX low treshold */
161 return s->aux_thr[0];
163 case 0xa: /* TEMP high treshold */
164 return s->temp_thr[1];
165 case 0xb: /* TEMP low treshold */
166 return s->temp_thr[0];
169 return (s->pressure << 15) | ((!s->busy) << 14) |
170 (s->nextprecision << 13) | s->timing[0];
174 return (s->pin_func << 14) | s->filter;
176 case 0xf: /* Function select status */
177 return s->function >= 0 ? 1 << s->function : 0;
180 /* Never gets here */
184 static void tsc2005_write(TSC2005State *s, int reg, uint16_t data)
187 case 0x8: /* AUX high treshold */
188 s->aux_thr[1] = data;
190 case 0x9: /* AUX low treshold */
191 s->aux_thr[0] = data;
194 case 0xa: /* TEMP high treshold */
195 s->temp_thr[1] = data;
197 case 0xb: /* TEMP low treshold */
198 s->temp_thr[0] = data;
202 s->host_mode = (data >> 15) != 0;
203 if (s->enabled != !(data & 0x4000)) {
204 s->enabled = !(data & 0x4000);
205 trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
206 if (s->busy && !s->enabled)
208 s->busy = s->busy && s->enabled;
210 s->nextprecision = (data >> 13) & 1;
211 s->timing[0] = data & 0x1fff;
212 if ((s->timing[0] >> 11) == 3) {
213 qemu_log_mask(LOG_GUEST_ERROR,
214 "tsc2005_write: illegal conversion clock setting\n");
218 s->timing[1] = data & 0xf07;
221 s->pin_func = (data >> 14) & 3;
222 s->filter = data & 0x3fff;
226 qemu_log_mask(LOG_GUEST_ERROR,
227 "%s: write into read-only register 0x%x\n",
232 /* This handles most of the chip's logic. */
233 static void tsc2005_pin_update(TSC2005State *s)
238 switch (s->pin_func) {
240 pin_state = !s->pressure && !!s->dav;
248 pin_state = !s->pressure;
251 if (pin_state != s->irq) {
253 qemu_set_irq(s->pint, s->irq);
256 switch (s->nextfunction) {
257 case TSC_MODE_XYZ_SCAN:
258 case TSC_MODE_XY_SCAN:
259 if (!s->host_mode && s->dav)
264 case TSC_MODE_AUX_SCAN:
276 case TSC_MODE_X_TEST:
277 case TSC_MODE_Y_TEST:
278 case TSC_MODE_TS_TEST:
283 case TSC_MODE_RESERVED:
284 case TSC_MODE_XX_DRV:
285 case TSC_MODE_YY_DRV:
286 case TSC_MODE_YX_DRV:
291 if (!s->enabled || s->busy)
295 s->precision = s->nextprecision;
296 s->function = s->nextfunction;
297 s->pdst = !s->pnd0; /* Synchronised on internal clock */
298 expires = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
299 (NANOSECONDS_PER_SECOND >> 7);
300 timer_mod(s->timer, expires);
303 static void tsc2005_reset(TSC2005State *s)
309 s->nextprecision = false;
319 s->temp_thr[0] = 0x000;
320 s->temp_thr[1] = 0xfff;
321 s->aux_thr[0] = 0x000;
322 s->aux_thr[1] = 0xfff;
324 tsc2005_pin_update(s);
327 static uint8_t tsc2005_txrx_word(void *opaque, uint8_t value)
329 TSC2005State *s = opaque;
332 switch (s->state ++) {
336 if (value & (1 << 1))
339 s->nextfunction = (value >> 3) & 0xf;
340 s->nextprecision = (value >> 2) & 1;
341 if (s->enabled != !(value & 1)) {
342 s->enabled = !(value & 1);
343 trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
344 if (s->busy && !s->enabled)
346 s->busy = s->busy && s->enabled;
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 TSC2005State *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 TSC2005State *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 int tsc2005_post_load(void *opaque, int version_id)
442 TSC2005State *s = (TSC2005State *) opaque;
444 s->busy = timer_pending(s->timer);
445 tsc2005_pin_update(s);
450 static const VMStateDescription vmstate_tsc2005 = {
453 .minimum_version_id = 2,
454 .post_load = tsc2005_post_load,
455 .fields = (VMStateField []) {
456 VMSTATE_BOOL(pressure, TSC2005State),
457 VMSTATE_BOOL(irq, TSC2005State),
458 VMSTATE_BOOL(command, TSC2005State),
459 VMSTATE_BOOL(enabled, TSC2005State),
460 VMSTATE_BOOL(host_mode, TSC2005State),
461 VMSTATE_BOOL(reset, TSC2005State),
462 VMSTATE_BOOL(pdst, TSC2005State),
463 VMSTATE_BOOL(pnd0, TSC2005State),
464 VMSTATE_BOOL(precision, TSC2005State),
465 VMSTATE_BOOL(nextprecision, TSC2005State),
466 VMSTATE_UINT8(reg, TSC2005State),
467 VMSTATE_UINT8(state, TSC2005State),
468 VMSTATE_UINT16(data, TSC2005State),
469 VMSTATE_UINT16(dav, TSC2005State),
470 VMSTATE_UINT16(filter, TSC2005State),
471 VMSTATE_INT8(nextfunction, TSC2005State),
472 VMSTATE_INT8(function, TSC2005State),
473 VMSTATE_INT32(x, TSC2005State),
474 VMSTATE_INT32(y, TSC2005State),
475 VMSTATE_TIMER_PTR(timer, TSC2005State),
476 VMSTATE_UINT8(pin_func, TSC2005State),
477 VMSTATE_UINT16_ARRAY(timing, TSC2005State, 2),
478 VMSTATE_UINT8(noise, TSC2005State),
479 VMSTATE_UINT16_ARRAY(temp_thr, TSC2005State, 2),
480 VMSTATE_UINT16_ARRAY(aux_thr, TSC2005State, 2),
481 VMSTATE_INT32_ARRAY(tr, TSC2005State, 8),
482 VMSTATE_END_OF_LIST()
486 void *tsc2005_init(qemu_irq pintdav)
491 g_malloc0(sizeof(TSC2005State));
495 s->precision = s->nextprecision = false;
496 s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, tsc2005_timer_tick, s);
511 qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
512 "QEMU TSC2005-driven Touchscreen");
514 qemu_register_reset((void *) tsc2005_reset, s);
515 vmstate_register(NULL, 0, &vmstate_tsc2005, s);
521 * Use tslib generated calibration data to generate ADC input values
522 * from the touchscreen. Assuming 12-bit precision was used during
525 void tsc2005_set_transform(void *opaque, MouseTransformInfo *info)
527 TSC2005State *s = (TSC2005State *) opaque;
529 /* This version assumes touchscreen X & Y axis are parallel or
530 * perpendicular to LCD's X & Y axis in some way. */
531 if (abs(info->a[0]) > abs(info->a[1])) {
533 s->tr[1] = -info->a[6] * info->x;
534 s->tr[2] = info->a[0];
535 s->tr[3] = -info->a[2] / info->a[0];
536 s->tr[4] = info->a[6] * info->y;
538 s->tr[6] = info->a[4];
539 s->tr[7] = -info->a[5] / info->a[4];
541 s->tr[0] = info->a[6] * info->y;
543 s->tr[2] = info->a[1];
544 s->tr[3] = -info->a[2] / info->a[1];
546 s->tr[5] = -info->a[6] * info->x;
547 s->tr[6] = info->a[3];
548 s->tr[7] = -info->a[5] / info->a[3];