Adding upstream version 1:7.2+dfsg.upstream/1%7.2+dfsgupstream

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 558 insertions, 0 deletions

diff --git a/hw/input/tsc2005.c b/hw/input/tsc2005.c
new file mode 100644
index 00000000..14698ce1
--- /dev/null
+++ b/hw/input/tsc2005.c
@@ -0,0 +1,558 @@
+/*
+ * TI TSC2005 emulator.
+ *
+ * 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 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
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "qemu/timer.h"
+#include "sysemu/reset.h"
+#include "ui/console.h"
+#include "hw/input/tsc2xxx.h"
+#include "hw/irq.h"
+#include "migration/vmstate.h"
+#include "trace.h"
+
+#define TSC_CUT_RESOLUTION(value, p)	((value) >> (16 - (p ? 12 : 10)))
+
+typedef struct {
+    qemu_irq pint;	/* Combination of the nPENIRQ and DAV signals */
+    QEMUTimer *timer;
+    uint16_t model;
+
+    int32_t x, y;
+    bool pressure;
+
+    uint8_t reg, state;
+    bool irq, command;
+    uint16_t data, dav;
+
+    bool busy;
+    bool enabled;
+    bool host_mode;
+    int8_t function;
+    int8_t nextfunction;
+    bool precision;
+    bool nextprecision;
+    uint16_t filter;
+    uint8_t pin_func;
+    uint16_t timing[2];
+    uint8_t noise;
+    bool reset;
+    bool pdst;
+    bool pnd0;
+    uint16_t temp_thr[2];
+    uint16_t aux_thr[2];
+
+    int32_t tr[8];
+} TSC2005State;
+
+enum {
+    TSC_MODE_XYZ_SCAN	= 0x0,
+    TSC_MODE_XY_SCAN,
+    TSC_MODE_X,
+    TSC_MODE_Y,
+    TSC_MODE_Z,
+    TSC_MODE_AUX,
+    TSC_MODE_TEMP1,
+    TSC_MODE_TEMP2,
+    TSC_MODE_AUX_SCAN,
+    TSC_MODE_X_TEST,
+    TSC_MODE_Y_TEST,
+    TSC_MODE_TS_TEST,
+    TSC_MODE_RESERVED,
+    TSC_MODE_XX_DRV,
+    TSC_MODE_YY_DRV,
+    TSC_MODE_YX_DRV,
+};
+
+static const uint16_t mode_regs[16] = {
+    0xf000,	/* X, Y, Z scan */
+    0xc000,	/* X, Y scan */
+    0x8000,	/* X */
+    0x4000,	/* Y */
+    0x3000,	/* Z */
+    0x0800,	/* AUX */
+    0x0400,	/* TEMP1 */
+    0x0200,	/* TEMP2 */
+    0x0800,	/* AUX scan */
+    0x0040,	/* X test */
+    0x0020,	/* Y test */
+    0x0080,	/* Short-circuit test */
+    0x0000,	/* Reserved */
+    0x0000,	/* X+, X- drivers */
+    0x0000,	/* Y+, Y- drivers */
+    0x0000,	/* Y+, X- drivers */
+};
+
+#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)			\
+    ((4000 + ((s)->y >> 7) - ((s)->pressure << 10)) << 4)
+
+#define AUX_VAL				(700 << 4)	/* +/- 3 at 12-bit */
+#define TEMP1_VAL			(1264 << 4)	/* +/- 5 at 12-bit */
+#define TEMP2_VAL			(1531 << 4)	/* +/- 5 at 12-bit */
+
+static uint16_t tsc2005_read(TSC2005State *s, int reg)
+{
+    uint16_t ret;
+
+    switch (reg) {
+    case 0x0:	/* X */
+        s->dav &= ~mode_regs[TSC_MODE_X];
+        return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
+                (s->noise & 3);
+    case 0x1:	/* Y */
+        s->dav &= ~mode_regs[TSC_MODE_Y];
+        s->noise ++;
+        return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
+                (s->noise & 3);
+    case 0x2:	/* Z1 */
+        s->dav &= 0xdfff;
+        return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
+                (s->noise & 3);
+    case 0x3:	/* Z2 */
+        s->dav &= 0xefff;
+        return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
+                (s->noise & 3);
+
+    case 0x4:	/* AUX */
+        s->dav &= ~mode_regs[TSC_MODE_AUX];
+        return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
+
+    case 0x5:	/* TEMP1 */
+        s->dav &= ~mode_regs[TSC_MODE_TEMP1];
+        return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
+                (s->noise & 5);
+    case 0x6:	/* TEMP2 */
+        s->dav &= 0xdfff;
+        s->dav &= ~mode_regs[TSC_MODE_TEMP2];
+        return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
+                (s->noise & 3);
+
+    case 0x7:	/* Status */
+        ret = s->dav | (s->reset << 7) | (s->pdst << 2) | 0x0;
+        s->dav &= ~(mode_regs[TSC_MODE_X_TEST] | mode_regs[TSC_MODE_Y_TEST] |
+                        mode_regs[TSC_MODE_TS_TEST]);
+        s->reset = true;
+        return ret;
+
+    case 0x8:	/* AUX high treshold */
+        return s->aux_thr[1];
+    case 0x9:	/* AUX low treshold */
+        return s->aux_thr[0];
+
+    case 0xa:	/* TEMP high treshold */
+        return s->temp_thr[1];
+    case 0xb:	/* TEMP low treshold */
+        return s->temp_thr[0];
+
+    case 0xc:	/* CFR0 */
+        return (s->pressure << 15) | ((!s->busy) << 14) |
+                (s->nextprecision << 13) | s->timing[0]; 
+    case 0xd:	/* CFR1 */
+        return s->timing[1];
+    case 0xe:	/* CFR2 */
+        return (s->pin_func << 14) | s->filter;
+
+    case 0xf:	/* Function select status */
+        return s->function >= 0 ? 1 << s->function : 0;
+    }
+
+    /* Never gets here */
+    return 0xffff;
+}
+
+static void tsc2005_write(TSC2005State *s, int reg, uint16_t data)
+{
+    switch (reg) {
+    case 0x8:	/* AUX high treshold */
+        s->aux_thr[1] = data;
+        break;
+    case 0x9:	/* AUX low treshold */
+        s->aux_thr[0] = data;
+        break;
+
+    case 0xa:	/* TEMP high treshold */
+        s->temp_thr[1] = data;
+        break;
+    case 0xb:	/* TEMP low treshold */
+        s->temp_thr[0] = data;
+        break;
+
+    case 0xc:	/* CFR0 */
+        s->host_mode = (data >> 15) != 0;
+        if (s->enabled != !(data & 0x4000)) {
+            s->enabled = !(data & 0x4000);
+            trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
+            if (s->busy && !s->enabled)
+                timer_del(s->timer);
+            s->busy = s->busy && s->enabled;
+        }
+        s->nextprecision = (data >> 13) & 1;
+        s->timing[0] = data & 0x1fff;
+        if ((s->timing[0] >> 11) == 3) {
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "tsc2005_write: illegal conversion clock setting\n");
+        }
+        break;
+    case 0xd:	/* CFR1 */
+        s->timing[1] = data & 0xf07;
+        break;
+    case 0xe:	/* CFR2 */
+        s->pin_func = (data >> 14) & 3;
+        s->filter = data & 0x3fff;
+        break;
+
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: write into read-only register 0x%x\n",
+                      __func__, reg);
+    }
+}
+
+/* This handles most of the chip's logic.  */
+static void tsc2005_pin_update(TSC2005State *s)
+{
+    int64_t expires;
+    bool pin_state;
+
+    switch (s->pin_func) {
+    case 0:
+        pin_state = !s->pressure && !!s->dav;
+        break;
+    case 1:
+    case 3:
+    default:
+        pin_state = !s->dav;
+        break;
+    case 2:
+        pin_state = !s->pressure;
+    }
+
+    if (pin_state != s->irq) {
+        s->irq = pin_state;
+        qemu_set_irq(s->pint, s->irq);
+    }
+
+    switch (s->nextfunction) {
+    case TSC_MODE_XYZ_SCAN:
+    case TSC_MODE_XY_SCAN:
+        if (!s->host_mode && s->dav)
+            s->enabled = false;
+        if (!s->pressure)
+            return;
+        /* Fall through */
+    case TSC_MODE_AUX_SCAN:
+        break;
+
+    case TSC_MODE_X:
+    case TSC_MODE_Y:
+    case TSC_MODE_Z:
+        if (!s->pressure)
+            return;
+        /* Fall through */
+    case TSC_MODE_AUX:
+    case TSC_MODE_TEMP1:
+    case TSC_MODE_TEMP2:
+    case TSC_MODE_X_TEST:
+    case TSC_MODE_Y_TEST:
+    case TSC_MODE_TS_TEST:
+        if (s->dav)
+            s->enabled = false;
+        break;
+
+    case TSC_MODE_RESERVED:
+    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 = true;
+    s->precision = s->nextprecision;
+    s->function = s->nextfunction;
+    s->pdst = !s->pnd0;	/* Synchronised on internal clock */
+    expires = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+        (NANOSECONDS_PER_SECOND >> 7);
+    timer_mod(s->timer, expires);
+}
+
+static void tsc2005_reset(TSC2005State *s)
+{
+    s->state = 0;
+    s->pin_func = 0;
+    s->enabled = false;
+    s->busy = false;
+    s->nextprecision = false;
+    s->nextfunction = 0;
+    s->timing[0] = 0;
+    s->timing[1] = 0;
+    s->irq = false;
+    s->dav = 0;
+    s->reset = false;
+    s->pdst = true;
+    s->pnd0 = false;
+    s->function = -1;
+    s->temp_thr[0] = 0x000;
+    s->temp_thr[1] = 0xfff;
+    s->aux_thr[0] = 0x000;
+    s->aux_thr[1] = 0xfff;
+
+    tsc2005_pin_update(s);
+}
+
+static uint8_t tsc2005_txrx_word(void *opaque, uint8_t value)
+{
+    TSC2005State *s = opaque;
+    uint32_t ret = 0;
+
+    switch (s->state ++) {
+    case 0:
+        if (value & 0x80) {
+            /* Command */
+            if (value & (1 << 1))
+                tsc2005_reset(s);
+            else {
+                s->nextfunction = (value >> 3) & 0xf;
+                s->nextprecision = (value >> 2) & 1;
+                if (s->enabled != !(value & 1)) {
+                    s->enabled = !(value & 1);
+                    trace_tsc2005_sense(s->enabled ? "enabled" : "disabled");
+                    if (s->busy && !s->enabled)
+                        timer_del(s->timer);
+                    s->busy = s->busy && s->enabled;
+                }
+                tsc2005_pin_update(s);
+            }
+
+            s->state = 0;
+        } else if (value) {
+            /* Data transfer */
+            s->reg = (value >> 3) & 0xf;
+            s->pnd0 = (value >> 1) & 1;
+            s->command = value & 1;
+
+            if (s->command) {
+                /* Read */
+                s->data = tsc2005_read(s, s->reg);
+                tsc2005_pin_update(s);
+            } else
+                s->data = 0;
+        } else
+            s->state = 0;
+        break;
+
+    case 1:
+        if (s->command)
+            ret = (s->data >> 8) & 0xff;
+        else
+            s->data |= value << 8;
+        break;
+
+    case 2:
+        if (s->command)
+            ret = s->data & 0xff;
+        else {
+            s->data |= value;
+            tsc2005_write(s, s->reg, s->data);
+            tsc2005_pin_update(s);
+        }
+
+        s->state = 0;
+        break;
+    }
+
+    return ret;
+}
+
+uint32_t tsc2005_txrx(void *opaque, uint32_t value, int len)
+{
+    uint32_t ret = 0;
+
+    len &= ~7;
+    while (len > 0) {
+        len -= 8;
+        ret |= tsc2005_txrx_word(opaque, (value >> len) & 0xff) << len;
+    }
+
+    return ret;
+}
+
+static void tsc2005_timer_tick(void *opaque)
+{
+    TSC2005State *s = opaque;
+
+    /* Timer ticked -- a set of conversions has been finished.  */
+
+    if (!s->busy)
+        return;
+
+    s->busy = false;
+    s->dav |= mode_regs[s->function];
+    s->function = -1;
+    tsc2005_pin_update(s);
+}
+
+static void tsc2005_touchscreen_event(void *opaque,
+                int x, int y, int z, int buttons_state)
+{
+    TSC2005State *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)
+        tsc2005_pin_update(s);
+}
+
+static int tsc2005_post_load(void *opaque, int version_id)
+{
+    TSC2005State *s = (TSC2005State *) opaque;
+
+    s->busy = timer_pending(s->timer);
+    tsc2005_pin_update(s);
+
+    return 0;
+}
+
+static const VMStateDescription vmstate_tsc2005 = {
+    .name = "tsc2005",
+    .version_id = 2,
+    .minimum_version_id = 2,
+    .post_load = tsc2005_post_load,
+    .fields      = (VMStateField []) {
+        VMSTATE_BOOL(pressure, TSC2005State),
+        VMSTATE_BOOL(irq, TSC2005State),
+        VMSTATE_BOOL(command, TSC2005State),
+        VMSTATE_BOOL(enabled, TSC2005State),
+        VMSTATE_BOOL(host_mode, TSC2005State),
+        VMSTATE_BOOL(reset, TSC2005State),
+        VMSTATE_BOOL(pdst, TSC2005State),
+        VMSTATE_BOOL(pnd0, TSC2005State),
+        VMSTATE_BOOL(precision, TSC2005State),
+        VMSTATE_BOOL(nextprecision, TSC2005State),
+        VMSTATE_UINT8(reg, TSC2005State),
+        VMSTATE_UINT8(state, TSC2005State),
+        VMSTATE_UINT16(data, TSC2005State),
+        VMSTATE_UINT16(dav, TSC2005State),
+        VMSTATE_UINT16(filter, TSC2005State),
+        VMSTATE_INT8(nextfunction, TSC2005State),
+        VMSTATE_INT8(function, TSC2005State),
+        VMSTATE_INT32(x, TSC2005State),
+        VMSTATE_INT32(y, TSC2005State),
+        VMSTATE_TIMER_PTR(timer, TSC2005State),
+        VMSTATE_UINT8(pin_func, TSC2005State),
+        VMSTATE_UINT16_ARRAY(timing, TSC2005State, 2),
+        VMSTATE_UINT8(noise, TSC2005State),
+        VMSTATE_UINT16_ARRAY(temp_thr, TSC2005State, 2),
+        VMSTATE_UINT16_ARRAY(aux_thr, TSC2005State, 2),
+        VMSTATE_INT32_ARRAY(tr, TSC2005State, 8),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+void *tsc2005_init(qemu_irq pintdav)
+{
+    TSC2005State *s;
+
+    s = g_new0(TSC2005State, 1);
+    s->x = 400;
+    s->y = 240;
+    s->pressure = false;
+    s->precision = s->nextprecision = false;
+    s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, tsc2005_timer_tick, s);
+    s->pint = pintdav;
+    s->model = 0x2005;
+
+    s->tr[0] = 0;
+    s->tr[1] = 1;
+    s->tr[2] = 1;
+    s->tr[3] = 0;
+    s->tr[4] = 1;
+    s->tr[5] = 0;
+    s->tr[6] = 1;
+    s->tr[7] = 0;
+
+    tsc2005_reset(s);
+
+    qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
+                    "QEMU TSC2005-driven Touchscreen");
+
+    qemu_register_reset((void *) tsc2005_reset, s);
+    vmstate_register(NULL, 0, &vmstate_tsc2005, s);
+
+    return s;
+}
+
+/*
+ * Use tslib generated calibration data to generate ADC input values
+ * from the touchscreen.  Assuming 12-bit precision was used during
+ * tslib calibration.
+ */
+void tsc2005_set_transform(void *opaque, MouseTransformInfo *info)
+{
+    TSC2005State *s = (TSC2005State *) opaque;
+
+    /* 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;
+}