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"
23 #include "qemu/timer.h"
24 #include "sysemu/reset.h"
25 #include "ui/console.h"
26 #include "hw/input/tsc2xxx.h"
28 #include "migration/vmstate.h"
31 #define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - (p ? 12 : 10)))
34 qemu_irq pint; /* Combination of the nPENIRQ and DAV signals */
66 TSC_MODE_XYZ_SCAN = 0x0,
84 static const uint16_t mode_regs[16] = {
85 0xf000, /* X, Y, Z scan */
86 0xc000, /* X, Y scan */
93 0x0800, /* AUX scan */
96 0x0080, /* Short-circuit test */
97 0x0000, /* Reserved */
98 0x0000, /* X+, X- drivers */
99 0x0000, /* Y+, Y- drivers */
100 0x0000, /* Y+, X- drivers */
103 #define X_TRANSFORM(s) \
104 ((s->y * s->tr[0] - s->x * s->tr[1]) / s->tr[2] + s->tr[3])
105 #define Y_TRANSFORM(s) \
106 ((s->y * s->tr[4] - s->x * s->tr[5]) / s->tr[6] + s->tr[7])
107 #define Z1_TRANSFORM(s) \
108 ((400 - ((s)->x >> 7) + ((s)->pressure << 10)) << 4)
109 #define Z2_TRANSFORM(s) \
110 ((4000 + ((s)->y >> 7) - ((s)->pressure << 10)) << 4)
112 #define AUX_VAL (700 << 4) /* +/- 3 at 12-bit */
113 #define TEMP1_VAL (1264 << 4) /* +/- 5 at 12-bit */
114 #define TEMP2_VAL (1531 << 4) /* +/- 5 at 12-bit */
116 static uint16_t tsc2005_read(TSC2005State *s, int reg)
122 s->dav &= ~mode_regs[TSC_MODE_X];
123 return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
126 s->dav &= ~mode_regs[TSC_MODE_Y];
128 return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
132 return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
136 return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
140 s->dav &= ~mode_regs[TSC_MODE_AUX];
141 return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
143 case 0x5: /* TEMP1 */
144 s->dav &= ~mode_regs[TSC_MODE_TEMP1];
145 return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
147 case 0x6: /* TEMP2 */
149 s->dav &= ~mode_regs[TSC_MODE_TEMP2];
150 return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
153 case 0x7: /* Status */
154 ret = s->dav | (s->reset << 7) | (s->pdst << 2) | 0x0;
155 s->dav &= ~(mode_regs[TSC_MODE_X_TEST] | mode_regs[TSC_MODE_Y_TEST] |
156 mode_regs[TSC_MODE_TS_TEST]);
160 case 0x8: /* AUX high treshold */
161 return s->aux_thr[1];
162 case 0x9: /* AUX low treshold */
163 return s->aux_thr[0];
165 case 0xa: /* TEMP high treshold */
166 return s->temp_thr[1];
167 case 0xb: /* TEMP low treshold */
168 return s->temp_thr[0];
171 return (s->pressure << 15) | ((!s->busy) << 14) |
172 (s->nextprecision << 13) | s->timing[0];
176 return (s->pin_func << 14) | s->filter;
178 case 0xf: /* Function select status */
179 return s->function >= 0 ? 1 << s->function : 0;
182 /* Never gets here */
186 static void tsc2005_write(TSC2005State *s, int reg, uint16_t data)
189 case 0x8: /* AUX high treshold */
190 s->aux_thr[1] = data;
192 case 0x9: /* AUX low treshold */
193 s->aux_thr[0] = data;
196 case 0xa: /* TEMP high treshold */
197 s->temp_thr[1] = data;
199 case 0xb: /* TEMP low treshold */
200 s->temp_thr[0] = data;
204 s->host_mode = (data >> 15) != 0;
205 if (s->enabled != !(data & 0x4000)) {
206 s->enabled = !(data & 0x4000);
207 trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
208 if (s->busy && !s->enabled)
210 s->busy = s->busy && s->enabled;
212 s->nextprecision = (data >> 13) & 1;
213 s->timing[0] = data & 0x1fff;
214 if ((s->timing[0] >> 11) == 3) {
215 qemu_log_mask(LOG_GUEST_ERROR,
216 "tsc2005_write: illegal conversion clock setting\n");
220 s->timing[1] = data & 0xf07;
223 s->pin_func = (data >> 14) & 3;
224 s->filter = data & 0x3fff;
228 qemu_log_mask(LOG_GUEST_ERROR,
229 "%s: write into read-only register 0x%x\n",
234 /* This handles most of the chip's logic. */
235 static void tsc2005_pin_update(TSC2005State *s)
240 switch (s->pin_func) {
242 pin_state = !s->pressure && !!s->dav;
250 pin_state = !s->pressure;
253 if (pin_state != s->irq) {
255 qemu_set_irq(s->pint, s->irq);
258 switch (s->nextfunction) {
259 case TSC_MODE_XYZ_SCAN:
260 case TSC_MODE_XY_SCAN:
261 if (!s->host_mode && s->dav)
266 case TSC_MODE_AUX_SCAN:
278 case TSC_MODE_X_TEST:
279 case TSC_MODE_Y_TEST:
280 case TSC_MODE_TS_TEST:
285 case TSC_MODE_RESERVED:
286 case TSC_MODE_XX_DRV:
287 case TSC_MODE_YY_DRV:
288 case TSC_MODE_YX_DRV:
293 if (!s->enabled || s->busy)
297 s->precision = s->nextprecision;
298 s->function = s->nextfunction;
299 s->pdst = !s->pnd0; /* Synchronised on internal clock */
300 expires = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
301 (NANOSECONDS_PER_SECOND >> 7);
302 timer_mod(s->timer, expires);
305 static void tsc2005_reset(TSC2005State *s)
311 s->nextprecision = false;
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 static uint8_t tsc2005_txrx_word(void *opaque, uint8_t value)
331 TSC2005State *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 trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
346 if (s->busy && !s->enabled)
348 s->busy = s->busy && s->enabled;
350 tsc2005_pin_update(s);
356 s->reg = (value >> 3) & 0xf;
357 s->pnd0 = (value >> 1) & 1;
358 s->command = value & 1;
362 s->data = tsc2005_read(s, s->reg);
363 tsc2005_pin_update(s);
372 ret = (s->data >> 8) & 0xff;
374 s->data |= value << 8;
379 ret = s->data & 0xff;
382 tsc2005_write(s, s->reg, s->data);
383 tsc2005_pin_update(s);
393 uint32_t tsc2005_txrx(void *opaque, uint32_t value, int len)
400 ret |= tsc2005_txrx_word(opaque, (value >> len) & 0xff) << len;
406 static void tsc2005_timer_tick(void *opaque)
408 TSC2005State *s = opaque;
410 /* Timer ticked -- a set of conversions has been finished. */
416 s->dav |= mode_regs[s->function];
418 tsc2005_pin_update(s);
421 static void tsc2005_touchscreen_event(void *opaque,
422 int x, int y, int z, int buttons_state)
424 TSC2005State *s = opaque;
431 s->pressure = !!buttons_state;
434 * Note: We would get better responsiveness in the guest by
435 * signaling TS events immediately, but for now we simulate
436 * the first conversion delay for sake of correctness.
438 if (p != s->pressure)
439 tsc2005_pin_update(s);
442 static int tsc2005_post_load(void *opaque, int version_id)
444 TSC2005State *s = (TSC2005State *) opaque;
446 s->busy = timer_pending(s->timer);
447 tsc2005_pin_update(s);
452 static const VMStateDescription vmstate_tsc2005 = {
455 .minimum_version_id = 2,
456 .post_load = tsc2005_post_load,
457 .fields = (VMStateField []) {
458 VMSTATE_BOOL(pressure, TSC2005State),
459 VMSTATE_BOOL(irq, TSC2005State),
460 VMSTATE_BOOL(command, TSC2005State),
461 VMSTATE_BOOL(enabled, TSC2005State),
462 VMSTATE_BOOL(host_mode, TSC2005State),
463 VMSTATE_BOOL(reset, TSC2005State),
464 VMSTATE_BOOL(pdst, TSC2005State),
465 VMSTATE_BOOL(pnd0, TSC2005State),
466 VMSTATE_BOOL(precision, TSC2005State),
467 VMSTATE_BOOL(nextprecision, TSC2005State),
468 VMSTATE_UINT8(reg, TSC2005State),
469 VMSTATE_UINT8(state, TSC2005State),
470 VMSTATE_UINT16(data, TSC2005State),
471 VMSTATE_UINT16(dav, TSC2005State),
472 VMSTATE_UINT16(filter, TSC2005State),
473 VMSTATE_INT8(nextfunction, TSC2005State),
474 VMSTATE_INT8(function, TSC2005State),
475 VMSTATE_INT32(x, TSC2005State),
476 VMSTATE_INT32(y, TSC2005State),
477 VMSTATE_TIMER_PTR(timer, TSC2005State),
478 VMSTATE_UINT8(pin_func, TSC2005State),
479 VMSTATE_UINT16_ARRAY(timing, TSC2005State, 2),
480 VMSTATE_UINT8(noise, TSC2005State),
481 VMSTATE_UINT16_ARRAY(temp_thr, TSC2005State, 2),
482 VMSTATE_UINT16_ARRAY(aux_thr, TSC2005State, 2),
483 VMSTATE_INT32_ARRAY(tr, TSC2005State, 8),
484 VMSTATE_END_OF_LIST()
488 void *tsc2005_init(qemu_irq pintdav)
492 s = g_new0(TSC2005State, 1);
496 s->precision = s->nextprecision = false;
497 s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, tsc2005_timer_tick, s);
512 qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
513 "QEMU TSC2005-driven Touchscreen");
515 qemu_register_reset((void *) tsc2005_reset, s);
516 vmstate_register(NULL, 0, &vmstate_tsc2005, s);
522 * Use tslib generated calibration data to generate ADC input values
523 * from the touchscreen. Assuming 12-bit precision was used during
526 void tsc2005_set_transform(void *opaque, const MouseTransformInfo *info)
528 TSC2005State *s = (TSC2005State *) opaque;
530 /* This version assumes touchscreen X & Y axis are parallel or
531 * perpendicular to LCD's X & Y axis in some way. */
532 if (abs(info->a[0]) > abs(info->a[1])) {
534 s->tr[1] = -info->a[6] * info->x;
535 s->tr[2] = info->a[0];
536 s->tr[3] = -info->a[2] / info->a[0];
537 s->tr[4] = info->a[6] * info->y;
539 s->tr[6] = info->a[4];
540 s->tr[7] = -info->a[5] / info->a[4];
542 s->tr[0] = info->a[6] * info->y;
544 s->tr[2] = info->a[1];
545 s->tr[3] = -info->a[2] / info->a[1];
547 s->tr[5] = -info->a[6] * info->x;
548 s->tr[6] = info->a[3];
549 s->tr[7] = -info->a[5] / info->a[3];