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Add TSC2301 touchscreen & keypad controller.

Browse source 
Add also a facility for setting up touchscreen calibration data per-board
based on calibration data generated by tslib.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4214 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
balrog 2008-04-14 21:28:11 +00:00
parent 827df9f3c5
commit a5d7eb6534
4 changed files with 290 additions and 28 deletions
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8
console.h
View file

@ -32,6 +32,14 @@ void kbd_put_keycode(int keycode);
void kbd_mouse_event(int dx, int dy, int dz, int buttons_state);
int kbd_mouse_is_absolute(void);
struct mouse_transform_info_s {
/* Touchscreen resolution */
int x;
int y;
/* Calibration values as used/generated by tslib */
int a[7];
};
void do_info_mice(void);
void do_mouse_set(int index);

12
hw/devices.h
View file

@ -16,6 +16,18 @@ uint32_t ads7846_read(void *opaque);
void ads7846_write(void *opaque, uint32_t value);
struct ads7846_state_s *ads7846_init(qemu_irq penirq);
/* tsc210x.c */
struct uwire_slave_s;
struct mouse_transform_info_s;
struct uwire_slave_s *tsc2102_init(qemu_irq pint, AudioState *audio);
struct uwire_slave_s *tsc2301_init(qemu_irq penirq, qemu_irq kbirq,
qemu_irq dav, AudioState *audio);
struct i2s_codec_s *tsc210x_codec(struct uwire_slave_s *chip);
uint32_t tsc210x_txrx(void *opaque, uint32_t value);
void tsc210x_set_transform(struct uwire_slave_s *chip,
struct mouse_transform_info_s *info);
void tsc210x_key_event(struct uwire_slave_s *chip, int key, int down);
/* stellaris_input.c */
void stellaris_gamepad_init(int n, qemu_irq *irq, const int *keycode);

6
hw/omap.h
View file

@ -1125,10 +1125,4 @@ inline static int debug_register_io_memory(int io_index,
# define cpu_register_io_memory debug_register_io_memory
# endif
/* Not really omap specific, but is the only thing that uses the
uwire interface. */
/* tsc210x.c */
struct uwire_slave_s *tsc2102_init(qemu_irq pint, AudioState *audio);
struct i2s_codec_s *tsc210x_codec(struct uwire_slave_s *chip);
#endif /* hw_omap_h */

292
hw/tsc210x.c
View file

@ -1,12 +1,14 @@
/*
* TI TSC2102 (touchscreen/sensors/audio controller) emulator.
* TI TSC2301 (touchscreen/sensors/keypad).
*
* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
* Copyright (C) 2008 Nokia Corporation
*
* 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.
* published by the Free Software Foundation; either version 2 or
* (at your option) version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
@ -35,12 +37,15 @@
struct tsc210x_state_s {
qemu_irq pint;
qemu_irq kbint;
qemu_irq davint;
QEMUTimer *timer;
QEMUSoundCard card;
struct uwire_slave_s chip;
struct i2s_codec_s codec;
uint8_t in_fifo[16384];
uint8_t out_fifo[16384];
uint16_t model;
int x, y;
int pressure;
@ -64,7 +69,7 @@ struct tsc210x_state_s {
uint16_t audio_ctrl1;
uint16_t audio_ctrl2;
uint16_t audio_ctrl3;
uint16_t pll[2];
uint16_t pll[3];
uint16_t volume;
int64_t volume_change;
int softstep;
@ -78,6 +83,17 @@ struct tsc210x_state_s {
int i2s_rx_rate;
int i2s_tx_rate;
AudioState *audio;
int tr[8];
struct {
uint16_t down;
uint16_t mask;
int scan;
int debounce;
int mode;
int intr;
} kb;
};
static const int resolution[4] = { 12, 8, 10, 12 };
@ -118,17 +134,10 @@ static const uint16_t mode_regs[16] = {
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 X_TRANSFORM(s) \
((s->y * s->tr[0] - s->x * s->tr[1]) / s->tr[2] + s->tr[3])
#define Y_TRANSFORM(s) \
((s->y * s->tr[4] - s->x * s->tr[5]) / s->tr[6] + s->tr[7])
#define Z1_TRANSFORM(s) \
((400 - ((s)->x >> 7) + ((s)->pressure << 10)) << 4)
#define Z2_TRANSFORM(s) \
@ -161,6 +170,7 @@ static void tsc210x_reset(struct tsc210x_state_s *s)
s->audio_ctrl3 = 0x0000;
s->pll[0] = 0x1004;
s->pll[1] = 0x0000;
s->pll[2] = 0x1fff;
s->volume = 0xffff;
s->dac_power = 0x8540;
s->softstep = 1;
@ -190,7 +200,15 @@ static void tsc210x_reset(struct tsc210x_state_s *s)
s->i2s_tx_rate = 0;
s->i2s_rx_rate = 0;
s->kb.scan = 1;
s->kb.debounce = 0;
s->kb.mask = 0x0000;
s->kb.mode = 3;
s->kb.intr = 0;
qemu_set_irq(s->pint, !s->irq);
qemu_set_irq(s->davint, !s->dav);
qemu_irq_raise(s->kbint);
}
struct tsc210x_rate_info_s {
@ -344,13 +362,13 @@ 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) +
return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
(s->noise & 3);
case 0x01: /* Y */
s->noise ++;
s->dav &= 0xfdff;
return TSC_CUT_RESOLUTION(Y_TRANSFORM(s->y), s->precision) ^
return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
(s->noise & 3);
case 0x02: /* Z1 */
@ -364,6 +382,14 @@ static uint16_t tsc2102_data_register_read(struct tsc210x_state_s *s, int reg)
(s->noise & 3);
case 0x04: /* KPData */
if ((s->model & 0xff00) == 0x2300) {
if (s->kb.intr && (s->kb.mode & 2)) {
s->kb.intr = 0;
qemu_irq_raise(s->kbint);
}
return s->kb.down;
}
return 0xffff;
case 0x05: /* BAT1 */
@ -414,9 +440,19 @@ static uint16_t tsc2102_control_register_read(
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 0x01: /* Status / Keypad Control */
if ((s->model & 0xff00) == 0x2100)
return (s->pin_func << 14) | ((!s->enabled) << 13) |
(s->host_mode << 12) | ((!!s->dav) << 11) | s->dav;
else
return (s->kb.intr << 15) | ((s->kb.scan || !s->kb.down) << 14) |
(s->kb.debounce << 11);
case 0x02: /* DAC Control */
if ((s->model & 0xff00) == 0x2300)
return s->dac_power & 0x8000;
else
goto bad_reg;
case 0x03: /* Reference */
return s->ref;
@ -427,7 +463,18 @@ static uint16_t tsc2102_control_register_read(
case 0x05: /* Configuration */
return s->timing;
case 0x06: /* Secondary configuration */
if ((s->model & 0xff00) == 0x2100)
goto bad_reg;
return ((!s->dav) << 15) | ((s->kb.mode & 1) << 14) | s->pll[2];
case 0x10: /* Keypad Mask */
if ((s->model & 0xff00) == 0x2100)
goto bad_reg;
return s->kb.mask;
default:
bad_reg:
#ifdef TSC_VERBOSE
fprintf(stderr, "tsc2102_control_register_read: "
"no such register: 0x%02x\n", reg);
@ -556,10 +603,27 @@ static void tsc2102_control_register_write(
s->filter = value & 0xff;
return;
case 0x01: /* Status */
s->pin_func = value >> 14;
case 0x01: /* Status / Keypad Control */
if ((s->model & 0xff00) == 0x2100)
s->pin_func = value >> 14;
else {
s->kb.scan = (value >> 14) & 1;
s->kb.debounce = (value >> 11) & 7;
if (s->kb.intr && s->kb.scan) {
s->kb.intr = 0;
qemu_irq_raise(s->kbint);
}
}
return;
case 0x02: /* DAC Control */
if ((s->model & 0xff00) == 0x2300) {
s->dac_power &= 0x7fff;
s->dac_power |= 0x8000 & value;
} else
goto bad_reg;
break;
case 0x03: /* Reference */
s->ref = value & 0x1f;
return;
@ -586,7 +650,21 @@ static void tsc2102_control_register_write(
#endif
return;
case 0x06: /* Secondary configuration */
if ((s->model & 0xff00) == 0x2100)
goto bad_reg;
s->kb.mode = value >> 14;
s->pll[2] = value & 0x3ffff;
return;
case 0x10: /* Keypad Mask */
if ((s->model & 0xff00) == 0x2100)
goto bad_reg;
s->kb.mask = value;
return;
default:
bad_reg:
#ifdef TSC_VERBOSE
fprintf(stderr, "tsc2102_control_register_write: "
"no such register: 0x%02x\n", reg);
@ -785,7 +863,7 @@ static void tsc210x_pin_update(struct tsc210x_state_s *s)
return;
}
if (!s->enabled || s->busy)
if (!s->enabled || s->busy || s->dav)
return;
s->busy = 1;
@ -805,6 +883,8 @@ static uint16_t tsc210x_read(struct tsc210x_state_s *s)
switch (s->page) {
case TSC_DATA_REGISTERS_PAGE:
ret = tsc2102_data_register_read(s, s->offset);
if (!s->dav)
qemu_irq_raise(s->davint);
break;
case TSC_CONTROL_REGISTERS_PAGE:
ret = tsc2102_control_register_read(s, s->offset);
@ -859,6 +939,22 @@ static void tsc210x_write(struct tsc210x_state_s *s, uint16_t value)
}
}
uint32_t tsc210x_txrx(void *opaque, uint32_t value)
{
struct tsc210x_state_s *s = opaque;
uint32_t ret = 0;
/* TODO: sequential reads etc - how do we make sure the host doesn't
* unintentionally read out a conversion result from a register while
* transmitting the command word of the next command? */
if (!value || (s->state && s->command))
ret = tsc210x_read(s);
if (value || (s->state && !s->command))
tsc210x_write(s, value);
return ret;
}
static void tsc210x_timer_tick(void *opaque)
{
struct tsc210x_state_s *s = opaque;
@ -871,6 +967,7 @@ static void tsc210x_timer_tick(void *opaque)
s->busy = 0;
s->dav |= mode_regs[s->function];
tsc210x_pin_update(s);
qemu_irq_lower(s->davint);
}
static void tsc210x_touchscreen_event(void *opaque,
@ -1001,6 +1098,7 @@ static int tsc210x_load(QEMUFile *f, void *opaque, int version_id)
s->busy = qemu_timer_pending(s->timer);
qemu_set_irq(s->pint, !s->irq);
qemu_set_irq(s->davint, !s->dav);
return 0;
}
@ -1020,9 +1118,19 @@ struct uwire_slave_s *tsc2102_init(qemu_irq pint, AudioState *audio)
s->precision = s->nextprecision = 0;
s->timer = qemu_new_timer(vm_clock, tsc210x_timer_tick, s);
s->pint = pint;
s->model = 0x2102;
s->name = "tsc2102";
s->audio = audio;
s->tr[0] = 0;
s->tr[1] = 1;
s->tr[2] = 0;
s->tr[3] = 1;
s->tr[4] = 1;
s->tr[5] = 0;
s->tr[6] = 0;
s->tr[7] = 1;
s->chip.opaque = s;
s->chip.send = (void *) tsc210x_write;
s->chip.receive = (void *) tsc210x_read;
@ -1048,9 +1156,149 @@ struct uwire_slave_s *tsc2102_init(qemu_irq pint, AudioState *audio)
return &s->chip;
}
struct uwire_slave_s *tsc2301_init(qemu_irq penirq, qemu_irq kbirq,
qemu_irq dav, AudioState *audio)
{
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 = 400;
s->y = 240;
s->pressure = 0;
s->precision = s->nextprecision = 0;
s->timer = qemu_new_timer(vm_clock, tsc210x_timer_tick, s);
s->pint = penirq;
s->kbint = kbirq;
s->davint = dav;
s->model = 0x2301;
s->name = "tsc2301";
s->audio = audio;
s->tr[0] = 0;
s->tr[1] = 1;
s->tr[2] = 0;
s->tr[3] = 1;
s->tr[4] = 1;
s->tr[5] = 0;
s->tr[6] = 0;
s->tr[7] = 1;
s->chip.opaque = s;
s->chip.send = (void *) tsc210x_write;
s->chip.receive = (void *) tsc210x_read;
s->codec.opaque = s;
s->codec.tx_swallow = (void *) tsc210x_i2s_swallow;
s->codec.set_rate = (void *) tsc210x_i2s_set_rate;
s->codec.in.fifo = s->in_fifo;
s->codec.out.fifo = s->out_fifo;
tsc210x_reset(s);
qemu_add_mouse_event_handler(tsc210x_touchscreen_event, s, 1,
"QEMU TSC2301-driven Touchscreen");
if (s->audio)
AUD_register_card(s->audio, s->name, &s->card);
qemu_register_reset((void *) tsc210x_reset, s);
register_savevm(s->name, tsc2102_iid ++, 0,
tsc210x_save, tsc210x_load, s);
return &s->chip;
}
struct i2s_codec_s *tsc210x_codec(struct uwire_slave_s *chip)
{
struct tsc210x_state_s *s = (struct tsc210x_state_s *) chip->opaque;
return &s->codec;
}
/*
* 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);
}
}