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[Qemu-devel] [RFC 02/13] ADB: VIA probes ADB bus when it is idle
From: |
Laurent Vivier |
Subject: |
[Qemu-devel] [RFC 02/13] ADB: VIA probes ADB bus when it is idle |
Date: |
Fri, 8 Jun 2018 22:05:47 +0200 |
Signed-off-by: Laurent Vivier <address@hidden>
---
hw/input/adb-kbd.c | 4 ++++
hw/input/adb-mouse.c | 4 ++++
hw/input/adb.c | 33 +++++++++++++++++++++++++--------
hw/misc/mac_via.c | 27 ++++++++++++++++++++++++++-
include/hw/input/adb.h | 1 +
5 files changed, 60 insertions(+), 9 deletions(-)
diff --git a/hw/input/adb-kbd.c b/hw/input/adb-kbd.c
index 50b62712c8..7de92935b8 100644
--- a/hw/input/adb-kbd.c
+++ b/hw/input/adb-kbd.c
@@ -195,6 +195,10 @@ static int adb_kbd_poll(ADBDevice *d, uint8_t *obuf)
int keycode;
int olen;
+ if (obuf == NULL) {
+ return s->count;
+ }
+
olen = 0;
if (s->count == 0) {
return 0;
diff --git a/hw/input/adb-mouse.c b/hw/input/adb-mouse.c
index 3ba6027d33..a3f0b74dd1 100644
--- a/hw/input/adb-mouse.c
+++ b/hw/input/adb-mouse.c
@@ -73,6 +73,10 @@ static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf)
return 0;
}
+ if (obuf == NULL) {
+ return 2;
+ }
+
dx = s->dx;
if (dx < -63) {
dx = -63;
diff --git a/hw/input/adb.c b/hw/input/adb.c
index 2e5460730c..756122ac09 100644
--- a/hw/input/adb.c
+++ b/hw/input/adb.c
@@ -94,28 +94,47 @@ int adb_poll(ADBBusState *s, uint8_t *obuf, uint16_t
poll_mask)
return olen;
}
+int adb_via_poll(ADBBusState *adb, int state, uint8_t *data)
+{
+ if (state != STATE_IDLE) {
+ return 0;
+ }
+ if (adb->data_in_size < adb->data_in_index) {
+ return 0;
+ }
+ if (adb->data_out_index != 0) {
+ return 0;
+ }
+ adb->data_in_index = 0;
+ adb->data_out_index = 0;
+ adb->data_in_size = adb_poll(adb, adb->data_in, 0xffff);
+ if (adb->data_in_size) {
+ *data = adb->data_in[adb->data_in_index++];
+ qemu_irq_raise(adb->data_ready);
+ }
+ return adb->data_in_size;
+}
+
int adb_send(ADBBusState *adb, int state, uint8_t data)
{
switch (state) {
case STATE_NEW:
- adb->data_out[0] = data;
- adb->data_out_index = 1;
+ adb->data_out_index = 0;
break;
case STATE_EVEN:
if ((adb->data_out_index & 1) == 0) {
return 0;
}
- adb->data_out[adb->data_out_index++] = data;
break;
case STATE_ODD:
if (adb->data_out_index & 1) {
return 0;
}
- adb->data_out[adb->data_out_index++] = data;
break;
case STATE_IDLE:
return 0;
}
+ adb->data_out[adb->data_out_index++] = data;
qemu_irq_raise(adb->data_ready);
return 1;
}
@@ -138,7 +157,6 @@ int adb_receive(ADBBusState *adb, int state, uint8_t *data)
if ((adb->data_in_index & 1) == 0) {
return 0;
}
- *data = adb->data_in[adb->data_in_index++];
break;
case STATE_ODD:
if (adb->data_in_size <= 0) {
@@ -153,7 +171,6 @@ int adb_receive(ADBBusState *adb, int state, uint8_t *data)
if (adb->data_in_index & 1) {
return 0;
}
- *data = adb->data_in[adb->data_in_index++];
break;
case STATE_IDLE:
if (adb->data_out_index == 0) {
@@ -162,6 +179,7 @@ int adb_receive(ADBBusState *adb, int state, uint8_t *data)
adb->data_in_size = adb_request(adb, adb->data_in,
adb->data_out, adb->data_out_index);
adb->data_out_index = 0;
+ adb->data_in_index = 0;
if (adb->data_in_size < 0) {
*data = 0xff;
qemu_irq_raise(adb->data_ready);
@@ -170,10 +188,9 @@ int adb_receive(ADBBusState *adb, int state, uint8_t *data)
if (adb->data_in_size == 0) {
return 0;
}
- *data = adb->data_in[0];
- adb->data_in_index = 1;
break;
}
+ *data = adb->data_in[adb->data_in_index++];
qemu_irq_raise(adb->data_ready);
if (*data == 0xff || *data == 0) {
return 0;
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c
index a6a11c5b3d..055091535f 100644
--- a/hw/misc/mac_via.c
+++ b/hw/misc/mac_via.c
@@ -247,6 +247,8 @@
#define VIA1B_vADB_StateMask (VIA1B_vADBS1 | VIA1B_vADBS2)
#define VIA1B_vADB_StateShift 4
+#define VIA_ADB_POLL_FREQ 50 /* XXX: not real */
+
typedef struct VIATimer {
int index;
uint16_t counter; /* Timer counter */
@@ -305,6 +307,7 @@ typedef struct MacVIAState {
/* ADB */
ADBBusState adb_bus;
+ QEMUTimer *adb_poll_timer;
/* external timers */
@@ -596,7 +599,7 @@ static void via1_adb_update(MacVIAState *m)
} else {
/* input mode */
ret = adb_receive(&m->adb_bus, state, &s->sr);
- if (ret > 0) {
+ if (ret > 0 && s->sr != 0xff) {
s->b &= ~VIA1B_vADBInt;
} else {
s->b |= VIA1B_vADBInt;
@@ -604,6 +607,23 @@ static void via1_adb_update(MacVIAState *m)
}
}
+static void via_adb_poll(void *opaque)
+{
+ MacVIAState *m = opaque;
+ VIAState *s = &m->via[0];
+ int state;
+
+ if (s->b & VIA1B_vADBInt) {
+ state = (s->b & VIA1B_vADB_StateMask) >> VIA1B_vADB_StateShift;
+ if (adb_via_poll(&m->adb_bus, state, &s->sr)) {
+ s->b &= ~VIA1B_vADBInt;
+ }
+ }
+ timer_mod(m->adb_poll_timer,
+ qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+ (NANOSECONDS_PER_SECOND / VIA_ADB_POLL_FREQ));
+}
+
static void via_write(void *opaque, hwaddr addr,
uint64_t val, unsigned int size)
{
@@ -858,6 +878,10 @@ static void mac_via_reset(DeviceState *dev)
m->cmd = 0;
m->wprotect = 0;
m->alt = 0;
+
+ timer_mod(m->adb_poll_timer,
+ qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+ (NANOSECONDS_PER_SECOND / VIA_ADB_POLL_FREQ));
}
static void mac_via_realizefn(DeviceState *dev, Error **errp)
@@ -872,6 +896,7 @@ static void mac_via_realizefn(DeviceState *dev, Error
**errp)
qemu_get_timedate(&tm, 0);
m->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
+ m->adb_poll_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, via_adb_poll, m);
/* ouput IRQs */
diff --git a/include/hw/input/adb.h b/include/hw/input/adb.h
index ce393004eb..9ef7fa2f0e 100644
--- a/include/hw/input/adb.h
+++ b/include/hw/input/adb.h
@@ -90,6 +90,7 @@ int adb_poll(ADBBusState *s, uint8_t *buf_out, uint16_t
poll_mask);
#define TYPE_ADB_KEYBOARD "adb-keyboard"
#define TYPE_ADB_MOUSE "adb-mouse"
+int adb_via_poll(ADBBusState *s, int state, uint8_t *data);
int adb_send(ADBBusState *adb, int state, uint8_t data);
int adb_receive(ADBBusState *adb, int state, uint8_t *data);
#endif /* ADB_H */
--
2.14.4
- [Qemu-devel] [RFC 00/13] hw/m68k: add Apple Machintosh Quadra 800 machine, Laurent Vivier, 2018/06/08
- [Qemu-devel] [RFC 02/13] ADB: VIA probes ADB bus when it is idle,
Laurent Vivier <=
- [Qemu-devel] [RFC 03/13] escc: introduce a selector for the register bit, Laurent Vivier, 2018/06/08
- [Qemu-devel] [RFC 05/13] hw/m68k: Apple Sound Chip (ASC) emulation, Laurent Vivier, 2018/06/08
- [Qemu-devel] [RFC 08/13] hw/m68k: add a dummy SWIM floppy controller, Laurent Vivier, 2018/06/08
- [Qemu-devel] [RFC 04/13] hw/m68k: add video card, Laurent Vivier, 2018/06/08
- [Qemu-devel] [RFC 10/13] dp8393x: fix dp8393x_receive, Laurent Vivier, 2018/06/08
- [Qemu-devel] [RFC 01/13] hw/m68k: add via support, Laurent Vivier, 2018/06/08