+
+/*
+ * Use tslib generated calibration data to generate ADC input values
+ * from the touchscreen. Assuming 12-bit precision was used during
+ * tslib calibration.
+ */
+void tsc210x_set_transform(struct uwire_slave_s *chip,
+ struct mouse_transform_info_s *info)
+{
+ struct tsc210x_state_s *s = (struct tsc210x_state_s *) chip->opaque;
+#if 0
+ int64_t ltr[8];
+
+ ltr[0] = (int64_t) info->a[1] * info->y;
+ ltr[1] = (int64_t) info->a[4] * info->x;
+ ltr[2] = (int64_t) info->a[1] * info->a[3] -
+ (int64_t) info->a[4] * info->a[0];
+ ltr[3] = (int64_t) info->a[2] * info->a[4] -
+ (int64_t) info->a[5] * info->a[1];
+ ltr[4] = (int64_t) info->a[0] * info->y;
+ ltr[5] = (int64_t) info->a[3] * info->x;
+ ltr[6] = (int64_t) info->a[4] * info->a[0] -
+ (int64_t) info->a[1] * info->a[3];
+ ltr[7] = (int64_t) info->a[2] * info->a[3] -
+ (int64_t) info->a[5] * info->a[0];
+
+ /* Avoid integer overflow */
+ s->tr[0] = ltr[0] >> 11;
+ s->tr[1] = ltr[1] >> 11;
+ s->tr[2] = muldiv64(ltr[2], 1, info->a[6]);
+ s->tr[3] = muldiv64(ltr[3], 1 << 4, ltr[2]);
+ s->tr[4] = ltr[4] >> 11;
+ s->tr[5] = ltr[5] >> 11;
+ s->tr[6] = muldiv64(ltr[6], 1, info->a[6]);
+ s->tr[7] = muldiv64(ltr[7], 1 << 4, ltr[6]);
+#else
+
+ /* This version assumes touchscreen X & Y axis are parallel or
+ * perpendicular to LCD's X & Y axis in some way. */
+ if (abs(info->a[0]) > abs(info->a[1])) {
+ s->tr[0] = 0;
+ s->tr[1] = -info->a[6] * info->x;
+ s->tr[2] = info->a[0];
+ s->tr[3] = -info->a[2] / info->a[0];
+ s->tr[4] = info->a[6] * info->y;
+ s->tr[5] = 0;
+ s->tr[6] = info->a[4];
+ s->tr[7] = -info->a[5] / info->a[4];
+ } else {
+ s->tr[0] = info->a[6] * info->y;
+ s->tr[1] = 0;
+ s->tr[2] = info->a[1];
+ s->tr[3] = -info->a[2] / info->a[1];
+ s->tr[4] = 0;
+ s->tr[5] = -info->a[6] * info->x;
+ s->tr[6] = info->a[3];
+ s->tr[7] = -info->a[5] / info->a[3];
+ }
+
+ s->tr[0] >>= 11;
+ s->tr[1] >>= 11;
+ s->tr[3] <<= 4;
+ s->tr[4] >>= 11;
+ s->tr[5] >>= 11;
+ s->tr[7] <<= 4;
+#endif
+}
+
+void tsc210x_key_event(struct uwire_slave_s *chip, int key, int down)
+{
+ struct tsc210x_state_s *s = (struct tsc210x_state_s *) chip->opaque;
+
+ if (down)
+ s->kb.down |= 1 << key;
+ else
+ s->kb.down &= ~(1 << key);
+
+ if (down && (s->kb.down & ~s->kb.mask) && !s->kb.intr) {
+ s->kb.intr = 1;
+ qemu_irq_lower(s->kbint);
+ } else if (s->kb.intr && !(s->kb.down & ~s->kb.mask) &&
+ !(s->kb.mode & 1)) {
+ s->kb.intr = 0;
+ qemu_irq_raise(s->kbint);
+ }
+}