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-rw-r--r--hw/tsc210x.c848
1 files changed, 848 insertions, 0 deletions
diff --git a/hw/tsc210x.c b/hw/tsc210x.c
new file mode 100644
index 0000000000..6aa2bc8ad0
--- /dev/null
+++ b/hw/tsc210x.c
@@ -0,0 +1,848 @@
+/*
+ * TI TSC2102 (touchscreen/sensors/audio controller) controller.
+ *
+ * Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include "vl.h"
+
+#define TSC_DATA_REGISTERS_PAGE 0x0
+#define TSC_CONTROL_REGISTERS_PAGE 0x1
+#define TSC_AUDIO_REGISTERS_PAGE 0x2
+
+#define TSC_VERBOSE
+
+#define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - resolution[p]))
+
+struct tsc210x_state_s {
+ qemu_irq pint;
+ QEMUTimer *timer;
+ struct uwire_slave_s chip;
+
+ int x, y;
+ int pressure;
+
+ int state, page, offset, irq;
+ uint16_t command, dav;
+
+ int busy;
+ int enabled;
+ int host_mode;
+ int function;
+ int nextfunction;
+ int precision;
+ int nextprecision;
+ int filter;
+ int pin_func;
+ int ref;
+ int timing;
+ int noise;
+
+ uint16_t audio_ctrl1;
+ uint16_t audio_ctrl2;
+ uint16_t audio_ctrl3;
+ uint16_t pll[2];
+ uint16_t volume;
+ int64_t volume_change;
+ int softstep;
+ uint16_t dac_power;
+ int64_t powerdown;
+ uint16_t filter_data[0x14];
+};
+
+static const int resolution[4] = { 12, 8, 10, 12 };
+
+#define TSC_MODE_NO_SCAN 0x0
+#define TSC_MODE_XY_SCAN 0x1
+#define TSC_MODE_XYZ_SCAN 0x2
+#define TSC_MODE_X 0x3
+#define TSC_MODE_Y 0x4
+#define TSC_MODE_Z 0x5
+#define TSC_MODE_BAT1 0x6
+#define TSC_MODE_BAT2 0x7
+#define TSC_MODE_AUX 0x8
+#define TSC_MODE_AUX_SCAN 0x9
+#define TSC_MODE_TEMP1 0xa
+#define TSC_MODE_PORT_SCAN 0xb
+#define TSC_MODE_TEMP2 0xc
+#define TSC_MODE_XX_DRV 0xd
+#define TSC_MODE_YY_DRV 0xe
+#define TSC_MODE_YX_DRV 0xf
+
+static const uint16_t mode_regs[16] = {
+ 0x0000, /* No scan */
+ 0x0600, /* X, Y scan */
+ 0x0780, /* X, Y, Z scan */
+ 0x0400, /* X */
+ 0x0200, /* Y */
+ 0x0180, /* Z */
+ 0x0040, /* BAT1 */
+ 0x0030, /* BAT2 */
+ 0x0010, /* AUX */
+ 0x0010, /* AUX scan */
+ 0x0004, /* TEMP1 */
+ 0x0070, /* Port scan */
+ 0x0002, /* TEMP2 */
+ 0x0000, /* X+, X- drivers */
+ 0x0000, /* Y+, Y- drivers */
+ 0x0000, /* Y+, X- drivers */
+};
+
+/*
+ * Convert screen coordinates to arbitrary values that the
+ * touchscreen in my Palm Tungsten E device returns.
+ * This shouldn't really matter (because the guest system
+ * should calibrate the touchscreen anyway), but let's
+ * imitate some real hardware.
+ */
+#define X_TRANSFORM(value) \
+ ((3850 - ((int) (value) * (3850 - 250) / 32768)) << 4)
+#define Y_TRANSFORM(value) \
+ ((150 + ((int) (value) * (3037 - 150) / 32768)) << 4)
+#define Z1_TRANSFORM(s) \
+ ((400 - (s)->x + ((s)->pressure << 9)) << 4)
+#define Z2_TRANSFORM(s) \
+ ((4000 + (s)->y - ((s)->pressure << 10)) << 4)
+#define BAT1_VAL 0x8660
+#define BAT2_VAL 0x0000
+#define AUX1_VAL 0x35c0
+#define AUX2_VAL 0xffff
+#define TEMP1_VAL 0x8c70
+#define TEMP2_VAL 0xa5b0
+
+#define TSC_POWEROFF_DELAY 50
+#define TSC_SOFTSTEP_DELAY 50
+
+static void tsc210x_reset(struct tsc210x_state_s *s)
+{
+ s->state = 0;
+ s->pin_func = 2;
+ s->enabled = 0;
+ s->busy = 0;
+ s->nextfunction = 0;
+ s->ref = 0;
+ s->timing = 0;
+ s->irq = 0;
+ s->dav = 0;
+
+ s->audio_ctrl1 = 0x0000;
+ s->audio_ctrl2 = 0x4410;
+ s->audio_ctrl3 = 0x0000;
+ s->pll[0] = 0x1004;
+ s->pll[1] = 0x0000;
+ s->volume = 0xffff;
+ s->dac_power = 0x8540;
+ s->softstep = 1;
+ s->volume_change = 0;
+ s->powerdown = 0;
+ s->filter_data[0x00] = 0x6be3;
+ s->filter_data[0x01] = 0x9666;
+ s->filter_data[0x02] = 0x675d;
+ s->filter_data[0x03] = 0x6be3;
+ s->filter_data[0x04] = 0x9666;
+ s->filter_data[0x05] = 0x675d;
+ s->filter_data[0x06] = 0x7d83;
+ s->filter_data[0x07] = 0x84ee;
+ s->filter_data[0x08] = 0x7d83;
+ s->filter_data[0x09] = 0x84ee;
+ s->filter_data[0x0a] = 0x6be3;
+ s->filter_data[0x0b] = 0x9666;
+ s->filter_data[0x0c] = 0x675d;
+ s->filter_data[0x0d] = 0x6be3;
+ s->filter_data[0x0e] = 0x9666;
+ s->filter_data[0x0f] = 0x675d;
+ s->filter_data[0x10] = 0x7d83;
+ s->filter_data[0x11] = 0x84ee;
+ s->filter_data[0x12] = 0x7d83;
+ s->filter_data[0x13] = 0x84ee;
+
+ qemu_set_irq(s->pint, s->irq);
+}
+
+static uint16_t tsc2102_data_register_read(struct tsc210x_state_s *s, int reg)
+{
+ switch (reg) {
+ case 0x00: /* X */
+ s->dav &= 0xfbff;
+ return TSC_CUT_RESOLUTION(X_TRANSFORM(s->x), s->precision) +
+ (s->noise & 3);
+
+ case 0x01: /* Y */
+ s->noise ++;
+ s->dav &= 0xfdff;
+ return TSC_CUT_RESOLUTION(Y_TRANSFORM(s->y), s->precision) ^
+ (s->noise & 3);
+
+ case 0x02: /* Z1 */
+ s->dav &= 0xfeff;
+ return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
+ (s->noise & 3);
+
+ case 0x03: /* Z2 */
+ s->dav &= 0xff7f;
+ return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
+ (s->noise & 3);
+
+ case 0x04: /* KPData */
+ return 0xffff;
+
+ case 0x05: /* BAT1 */
+ s->dav &= 0xffbf;
+ return TSC_CUT_RESOLUTION(BAT1_VAL, s->precision);
+
+ case 0x06: /* BAT2 */
+ s->dav &= 0xffdf;
+ return TSC_CUT_RESOLUTION(BAT2_VAL, s->precision);
+
+ case 0x07: /* AUX1 */
+ s->dav &= 0xffef;
+ return TSC_CUT_RESOLUTION(AUX1_VAL, s->precision);
+
+ case 0x08: /* AUX2 */
+ s->dav &= 0xfff7;
+ return 0xffff;
+
+ case 0x09: /* TEMP1 */
+ s->dav &= 0xfffb;
+ return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision);
+
+ case 0x0a: /* TEMP2 */
+ s->dav &= 0xfffd;
+ return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision);
+
+ case 0x0b: /* DAC */
+ s->dav &= 0xfffe;
+ return 0xffff;
+
+ default:
+#ifdef TSC_VERBOSE
+ fprintf(stderr, "tsc2102_data_register_read: "
+ "no such register: 0x%02x\n", reg);
+#endif
+ return 0xffff;
+ }
+}
+
+static uint16_t tsc2102_control_register_read(
+ struct tsc210x_state_s *s, int reg)
+{
+ switch (reg) {
+ case 0x00: /* TSC ADC */
+ return (s->pressure << 15) | ((!s->busy) << 14) |
+ (s->nextfunction << 10) | (s->nextprecision << 8) | s->filter;
+
+ case 0x01: /* Status */
+ return (s->pin_func << 14) | ((!s->enabled) << 13) |
+ (s->host_mode << 12) | ((!!s->dav) << 11) | s->dav;
+
+ case 0x03: /* Reference */
+ return s->ref;
+
+ case 0x04: /* Reset */
+ return 0xffff;
+
+ case 0x05: /* Configuration */
+ return s->timing;
+
+ default:
+#ifdef TSC_VERBOSE
+ fprintf(stderr, "tsc2102_control_register_read: "
+ "no such register: 0x%02x\n", reg);
+#endif
+ return 0xffff;
+ }
+}
+
+static uint16_t tsc2102_audio_register_read(struct tsc210x_state_s *s, int reg)
+{
+ int l_ch, r_ch;
+ uint16_t val;
+
+ switch (reg) {
+ case 0x00: /* Audio Control 1 */
+ return s->audio_ctrl1;
+
+ case 0x01:
+ return 0xff00;
+
+ case 0x02: /* DAC Volume Control */
+ return s->volume;
+
+ case 0x03:
+ return 0x8b00;
+
+ case 0x04: /* Audio Control 2 */
+ l_ch = 1;
+ r_ch = 1;
+ if (s->softstep && !(s->dac_power & (1 << 10))) {
+ l_ch = (qemu_get_clock(vm_clock) >
+ s->volume_change + TSC_SOFTSTEP_DELAY);
+ r_ch = (qemu_get_clock(vm_clock) >
+ s->volume_change + TSC_SOFTSTEP_DELAY);
+ }
+
+ return s->audio_ctrl2 | (l_ch << 3) | (r_ch << 2);
+
+ case 0x05: /* Stereo DAC Power Control */
+ return 0x2aa0 | s->dac_power |
+ (((s->dac_power & (1 << 10)) &&
+ (qemu_get_clock(vm_clock) >
+ s->powerdown + TSC_POWEROFF_DELAY)) << 6);
+
+ case 0x06: /* Audio Control 3 */
+ val = s->audio_ctrl3 | 0x0001;
+ s->audio_ctrl3 &= 0xff3f;
+ return val;
+
+ case 0x07: /* LCH_BASS_BOOST_N0 */
+ case 0x08: /* LCH_BASS_BOOST_N1 */
+ case 0x09: /* LCH_BASS_BOOST_N2 */
+ case 0x0a: /* LCH_BASS_BOOST_N3 */
+ case 0x0b: /* LCH_BASS_BOOST_N4 */
+ case 0x0c: /* LCH_BASS_BOOST_N5 */
+ case 0x0d: /* LCH_BASS_BOOST_D1 */
+ case 0x0e: /* LCH_BASS_BOOST_D2 */
+ case 0x0f: /* LCH_BASS_BOOST_D4 */
+ case 0x10: /* LCH_BASS_BOOST_D5 */
+ case 0x11: /* RCH_BASS_BOOST_N0 */
+ case 0x12: /* RCH_BASS_BOOST_N1 */
+ case 0x13: /* RCH_BASS_BOOST_N2 */
+ case 0x14: /* RCH_BASS_BOOST_N3 */
+ case 0x15: /* RCH_BASS_BOOST_N4 */
+ case 0x16: /* RCH_BASS_BOOST_N5 */
+ case 0x17: /* RCH_BASS_BOOST_D1 */
+ case 0x18: /* RCH_BASS_BOOST_D2 */
+ case 0x19: /* RCH_BASS_BOOST_D4 */
+ case 0x1a: /* RCH_BASS_BOOST_D5 */
+ return s->filter_data[reg - 0x07];
+
+ case 0x1b: /* PLL Programmability 1 */
+ return s->pll[0];
+
+ case 0x1c: /* PLL Programmability 2 */
+ return s->pll[1];
+
+ case 0x1d: /* Audio Control 4 */
+ return (!s->softstep) << 14;
+
+ default:
+#ifdef TSC_VERBOSE
+ fprintf(stderr, "tsc2102_audio_register_read: "
+ "no such register: 0x%02x\n", reg);
+#endif
+ return 0xffff;
+ }
+}
+
+static void tsc2102_data_register_write(
+ struct tsc210x_state_s *s, int reg, uint16_t value)
+{
+ switch (reg) {
+ case 0x00: /* X */
+ case 0x01: /* Y */
+ case 0x02: /* Z1 */
+ case 0x03: /* Z2 */
+ case 0x05: /* BAT1 */
+ case 0x06: /* BAT2 */
+ case 0x07: /* AUX1 */
+ case 0x08: /* AUX2 */
+ case 0x09: /* TEMP1 */
+ case 0x0a: /* TEMP2 */
+ return;
+
+ default:
+#ifdef TSC_VERBOSE
+ fprintf(stderr, "tsc2102_data_register_write: "
+ "no such register: 0x%02x\n", reg);
+#endif
+ }
+}
+
+static void tsc2102_control_register_write(
+ struct tsc210x_state_s *s, int reg, uint16_t value)
+{
+ switch (reg) {
+ case 0x00: /* TSC ADC */
+ s->host_mode = value >> 15;
+ s->enabled = !(value & 0x4000);
+ if (s->busy && !s->enabled)
+ qemu_del_timer(s->timer);
+ s->busy &= s->enabled;
+ s->nextfunction = (value >> 10) & 0xf;
+ s->nextprecision = (value >> 8) & 3;
+ s->filter = value & 0xff;
+ return;
+
+ case 0x01: /* Status */
+ s->pin_func = value >> 14;
+ return;
+
+ case 0x03: /* Reference */
+ s->ref = value & 0x1f;
+ return;
+
+ case 0x04: /* Reset */
+ if (value == 0xbb00) {
+ if (s->busy)
+ qemu_del_timer(s->timer);
+ tsc210x_reset(s);
+#ifdef TSC_VERBOSE
+ } else {
+ fprintf(stderr, "tsc2102_control_register_write: "
+ "wrong value written into RESET\n");
+#endif
+ }
+ return;
+
+ case 0x05: /* Configuration */
+ s->timing = value & 0x3f;
+#ifdef TSC_VERBOSE
+ if (value & ~0x3f)
+ fprintf(stderr, "tsc2102_control_register_write: "
+ "wrong value written into CONFIG\n");
+#endif
+ return;
+
+ default:
+#ifdef TSC_VERBOSE
+ fprintf(stderr, "tsc2102_control_register_write: "
+ "no such register: 0x%02x\n", reg);
+#endif
+ }
+}
+
+static void tsc2102_audio_register_write(
+ struct tsc210x_state_s *s, int reg, uint16_t value)
+{
+ switch (reg) {
+ case 0x00: /* Audio Control 1 */
+ s->audio_ctrl1 = value & 0x0f3f;
+#ifdef TSC_VERBOSE
+ if ((value & ~0x0f3f) || ((value & 7) != ((value >> 3) & 7)))
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into Audio 1\n");
+#endif
+ return;
+
+ case 0x01:
+#ifdef TSC_VERBOSE
+ if (value != 0xff00)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into reg 0x01\n");
+#endif
+ return;
+
+ case 0x02: /* DAC Volume Control */
+ s->volume = value;
+ s->volume_change = qemu_get_clock(vm_clock);
+ return;
+
+ case 0x03:
+#ifdef TSC_VERBOSE
+ if (value != 0x8b00)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into reg 0x03\n");
+#endif
+ return;
+
+ case 0x04: /* Audio Control 2 */
+ s->audio_ctrl2 = value & 0xf7f2;
+#ifdef TSC_VERBOSE
+ if (value & ~0xf7fd)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into Audio 2\n");
+#endif
+ return;
+
+ case 0x05: /* Stereo DAC Power Control */
+ if ((value & ~s->dac_power) & (1 << 10))
+ s->powerdown = qemu_get_clock(vm_clock);
+
+ s->dac_power = value & 0x9543;
+#ifdef TSC_VERBOSE
+ if ((value & ~0x9543) != 0x2aa0)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into Power\n");
+#endif
+ return;
+
+ case 0x06: /* Audio Control 3 */
+ s->audio_ctrl3 &= 0x00c0;
+ s->audio_ctrl3 |= value & 0xf800;
+#ifdef TSC_VERBOSE
+ if (value & ~0xf8c7)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into Audio 3\n");
+#endif
+ return;
+
+ case 0x07: /* LCH_BASS_BOOST_N0 */
+ case 0x08: /* LCH_BASS_BOOST_N1 */
+ case 0x09: /* LCH_BASS_BOOST_N2 */
+ case 0x0a: /* LCH_BASS_BOOST_N3 */
+ case 0x0b: /* LCH_BASS_BOOST_N4 */
+ case 0x0c: /* LCH_BASS_BOOST_N5 */
+ case 0x0d: /* LCH_BASS_BOOST_D1 */
+ case 0x0e: /* LCH_BASS_BOOST_D2 */
+ case 0x0f: /* LCH_BASS_BOOST_D4 */
+ case 0x10: /* LCH_BASS_BOOST_D5 */
+ case 0x11: /* RCH_BASS_BOOST_N0 */
+ case 0x12: /* RCH_BASS_BOOST_N1 */
+ case 0x13: /* RCH_BASS_BOOST_N2 */
+ case 0x14: /* RCH_BASS_BOOST_N3 */
+ case 0x15: /* RCH_BASS_BOOST_N4 */
+ case 0x16: /* RCH_BASS_BOOST_N5 */
+ case 0x17: /* RCH_BASS_BOOST_D1 */
+ case 0x18: /* RCH_BASS_BOOST_D2 */
+ case 0x19: /* RCH_BASS_BOOST_D4 */
+ case 0x1a: /* RCH_BASS_BOOST_D5 */
+ s->filter_data[reg - 0x07] = value;
+ return;
+
+ case 0x1b: /* PLL Programmability 1 */
+ s->pll[0] = value & 0xfffc;
+#ifdef TSC_VERBOSE
+ if (value & ~0xfffc)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into PLL 1\n");
+#endif
+ return;
+
+ case 0x1c: /* PLL Programmability 2 */
+ s->pll[1] = value & 0xfffc;
+#ifdef TSC_VERBOSE
+ if (value & ~0xfffc)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into PLL 2\n");
+#endif
+ return;
+
+ case 0x1d: /* Audio Control 4 */
+ s->softstep = !(value & 0x4000);
+#ifdef TSC_VERBOSE
+ if (value & ~0x4000)
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "wrong value written into Audio 4\n");
+#endif
+ return;
+
+ default:
+#ifdef TSC_VERBOSE
+ fprintf(stderr, "tsc2102_audio_register_write: "
+ "no such register: 0x%02x\n", reg);
+#endif
+ }
+}
+
+/* This handles most of the chip logic. */
+static void tsc210x_pin_update(struct tsc210x_state_s *s)
+{
+ int64_t expires;
+ int pin_state;
+
+ switch (s->pin_func) {
+ case 0:
+ pin_state = s->pressure;
+ break;
+ case 1:
+ pin_state = !!s->dav;
+ break;
+ case 2:
+ default:
+ pin_state = s->pressure && !s->dav;
+ }
+
+ if (!s->enabled)
+ pin_state = 0;
+
+ if (pin_state != s->irq) {
+ s->irq = pin_state;
+ qemu_set_irq(s->pint, s->irq);
+ }
+
+ switch (s->nextfunction) {
+ case TSC_MODE_XY_SCAN:
+ case TSC_MODE_XYZ_SCAN:
+ if (!s->pressure)
+ return;
+ break;
+
+ case TSC_MODE_X:
+ case TSC_MODE_Y:
+ case TSC_MODE_Z:
+ if (!s->pressure)
+ return;
+ /* Fall through */
+ case TSC_MODE_BAT1:
+ case TSC_MODE_BAT2:
+ case TSC_MODE_AUX:
+ case TSC_MODE_TEMP1:
+ case TSC_MODE_TEMP2:
+ if (s->dav)
+ s->enabled = 0;
+ break;
+
+ case TSC_MODE_AUX_SCAN:
+ case TSC_MODE_PORT_SCAN:
+ break;
+
+ case TSC_MODE_NO_SCAN:
+ case TSC_MODE_XX_DRV:
+ case TSC_MODE_YY_DRV:
+ case TSC_MODE_YX_DRV:
+ default:
+ return;
+ }
+
+ if (!s->enabled || s->busy)
+ return;
+
+ s->busy = 1;
+ s->precision = s->nextprecision;
+ s->function = s->nextfunction;
+ expires = qemu_get_clock(vm_clock) + (ticks_per_sec >> 10);
+ qemu_mod_timer(s->timer, expires);
+}
+
+static uint16_t tsc210x_read(struct tsc210x_state_s *s)
+{
+ uint16_t ret = 0x0000;
+
+ if (!s->command)
+ fprintf(stderr, "tsc210x_read: SPI underrun!\n");
+
+ switch (s->page) {
+ case TSC_DATA_REGISTERS_PAGE:
+ ret = tsc2102_data_register_read(s, s->offset);
+ break;
+ case TSC_CONTROL_REGISTERS_PAGE:
+ ret = tsc2102_control_register_read(s, s->offset);
+ break;
+ case TSC_AUDIO_REGISTERS_PAGE:
+ ret = tsc2102_audio_register_read(s, s->offset);
+ break;
+ default:
+ cpu_abort(cpu_single_env, "tsc210x_read: wrong memory page\n");
+ }
+
+ tsc210x_pin_update(s);
+
+ /* Allow sequential reads. */
+ s->offset ++;
+ s->state = 0;
+ return ret;
+}
+
+static void tsc210x_write(struct tsc210x_state_s *s, uint16_t value)
+{
+ /*
+ * This is a two-state state machine for reading
+ * command and data every second time.
+ */
+ if (!s->state) {
+ s->command = value >> 15;
+ s->page = (value >> 11) & 0x0f;
+ s->offset = (value >> 5) & 0x3f;
+ s->state = 1;
+ } else {
+ if (s->command)
+ fprintf(stderr, "tsc210x_write: SPI overrun!\n");
+ else
+ switch (s->page) {
+ case TSC_DATA_REGISTERS_PAGE:
+ tsc2102_data_register_write(s, s->offset, value);
+ break;
+ case TSC_CONTROL_REGISTERS_PAGE:
+ tsc2102_control_register_write(s, s->offset, value);
+ break;
+ case TSC_AUDIO_REGISTERS_PAGE:
+ tsc2102_audio_register_write(s, s->offset, value);
+ break;
+ default:
+ cpu_abort(cpu_single_env,
+ "tsc210x_write: wrong memory page\n");
+ }
+
+ tsc210x_pin_update(s);
+ s->state = 0;
+ }
+}
+
+static void tsc210x_timer_tick(void *opaque)
+{
+ struct tsc210x_state_s *s = opaque;
+
+ /* Timer ticked -- a set of conversions has been finished. */
+
+ if (!s->busy)
+ return;
+
+ s->busy = 0;
+ s->dav |= mode_regs[s->function];
+ tsc210x_pin_update(s);
+}
+
+static void tsc210x_touchscreen_event(void *opaque,
+ int x, int y, int z, int buttons_state)
+{
+ struct tsc210x_state_s *s = opaque;
+ int p = s->pressure;
+
+ if (buttons_state) {
+ s->x = x;
+ s->y = y;
+ }
+ s->pressure = !!buttons_state;
+
+ /*
+ * Note: We would get better responsiveness in the guest by
+ * signaling TS events immediately, but for now we simulate
+ * the first conversion delay for sake of correctness.
+ */
+ if (p != s->pressure)
+ tsc210x_pin_update(s);
+}
+
+static void tsc210x_save(QEMUFile *f, void *opaque)
+{
+ struct tsc210x_state_s *s = (struct tsc210x_state_s *) opaque;
+ int64_t now = qemu_get_clock(vm_clock);
+ int i;
+
+ qemu_put_be16(f, s->x);
+ qemu_put_be16(f, s->y);
+ qemu_put_byte(f, s->pressure);
+
+ qemu_put_byte(f, s->state);
+ qemu_put_byte(f, s->page);
+ qemu_put_byte(f, s->offset);
+ qemu_put_byte(f, s->command);
+
+ qemu_put_byte(f, s->irq);
+ qemu_put_be16s(f, &s->dav);
+
+ qemu_put_timer(f, s->timer);
+ qemu_put_byte(f, s->enabled);
+ qemu_put_byte(f, s->host_mode);
+ qemu_put_byte(f, s->function);
+ qemu_put_byte(f, s->nextfunction);
+ qemu_put_byte(f, s->precision);
+ qemu_put_byte(f, s->nextprecision);
+ qemu_put_byte(f, s->filter);
+ qemu_put_byte(f, s->pin_func);
+ qemu_put_byte(f, s->ref);
+ qemu_put_byte(f, s->timing);
+ qemu_put_be32(f, s->noise);
+
+ qemu_put_be16s(f, &s->audio_ctrl1);
+ qemu_put_be16s(f, &s->audio_ctrl2);
+ qemu_put_be16s(f, &s->audio_ctrl3);
+ qemu_put_be16s(f, &s->pll[0]);
+ qemu_put_be16s(f, &s->pll[1]);
+ qemu_put_be16s(f, &s->volume);
+ qemu_put_be64(f, (uint64_t) (s->volume_change - now));
+ qemu_put_be64(f, (uint64_t) (s->powerdown - now));
+ qemu_put_byte(f, s->softstep);
+ qemu_put_be16s(f, &s->dac_power);
+
+ for (i = 0; i < 0x14; i ++)
+ qemu_put_be16s(f, &s->filter_data[i]);
+}
+
+static int tsc210x_load(QEMUFile *f, void *opaque, int version_id)
+{
+ struct tsc210x_state_s *s = (struct tsc210x_state_s *) opaque;
+ int64_t now = qemu_get_clock(vm_clock);
+ int i;
+
+ s->x = qemu_get_be16(f);
+ s->y = qemu_get_be16(f);
+ s->pressure = qemu_get_byte(f);
+
+ s->state = qemu_get_byte(f);
+ s->page = qemu_get_byte(f);
+ s->offset = qemu_get_byte(f);
+ s->command = qemu_get_byte(f);
+
+ s->irq = qemu_get_byte(f);
+ qemu_get_be16s(f, &s->dav);
+
+ qemu_get_timer(f, s->timer);
+ s->enabled = qemu_get_byte(f);
+ s->host_mode = qemu_get_byte(f);
+ s->function = qemu_get_byte(f);
+ s->nextfunction = qemu_get_byte(f);
+ s->precision = qemu_get_byte(f);
+ s->nextprecision = qemu_get_byte(f);
+ s->filter = qemu_get_byte(f);
+ s->pin_func = qemu_get_byte(f);
+ s->ref = qemu_get_byte(f);
+ s->timing = qemu_get_byte(f);
+ s->noise = qemu_get_be32(f);
+
+ qemu_get_be16s(f, &s->audio_ctrl1);
+ qemu_get_be16s(f, &s->audio_ctrl2);
+ qemu_get_be16s(f, &s->audio_ctrl3);
+ qemu_get_be16s(f, &s->pll[0]);
+ qemu_get_be16s(f, &s->pll[1]);
+ qemu_get_be16s(f, &s->volume);
+ s->volume_change = (int64_t) qemu_get_be64(f) + now;
+ s->powerdown = (int64_t) qemu_get_be64(f) + now;
+ s->softstep = qemu_get_byte(f);
+ qemu_get_be16s(f, &s->dac_power);
+
+ for (i = 0; i < 0x14; i ++)
+ qemu_get_be16s(f, &s->filter_data[i]);
+
+ s->busy = qemu_timer_pending(s->timer);
+ qemu_set_irq(s->pint, s->irq);
+
+ return 0;
+}
+
+static int tsc2102_iid = 0;
+
+struct uwire_slave_s *tsc2102_init(qemu_irq pint)
+{
+ struct tsc210x_state_s *s;
+
+ s = (struct tsc210x_state_s *)
+ qemu_mallocz(sizeof(struct tsc210x_state_s));
+ memset(s, 0, sizeof(struct tsc210x_state_s));
+ s->x = 160;
+ s->y = 160;
+ s->pressure = 0;
+ s->precision = s->nextprecision = 0;
+ s->timer = qemu_new_timer(vm_clock, tsc210x_timer_tick, s);
+ s->pint = pint;
+
+ s->chip.opaque = s;
+ s->chip.send = (void *) tsc210x_write;
+ s->chip.receive = (void *) tsc210x_read;
+
+ tsc210x_reset(s);
+
+ qemu_add_mouse_event_handler(tsc210x_touchscreen_event, s, 1,
+ "QEMU TSC2102-driven Touchscreen");
+
+ qemu_register_reset((void *) tsc210x_reset, s);
+ register_savevm("tsc2102", tsc2102_iid ++, 0,
+ tsc210x_save, tsc210x_load, s);
+
+ return &s->chip;
+}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-11-14 04:44:27 +0100