From: Laurent Vivier <laurent@vivier.eu>
To: qemu-devel@nongnu.org
Cc: "Kevin Wolf" <kwolf@redhat.com>, "Fam Zheng" <fam@euphon.net>,
qemu-block@nongnu.org, "Thomas Huth" <huth@tuxfamily.org>,
"Jason Wang" <jasowang@redhat.com>,
"Mark Cave-Ayland" <mark.cave-ayland@ilande.co.uk>,
"Laurent Vivier" <laurent@vivier.eu>,
"Dr . David Alan Gilbert" <dgilbert@redhat.com>,
"Hervé Poussineau" <hpoussin@reactos.org>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Max Reitz" <mreitz@redhat.com>,
"Aurelien Jarno" <aurelien@aurel32.net>
Subject: [Qemu-devel] [PATCH v8 05/10] hw/m68k: implement ADB bus support for via
Date: Thu, 20 Jun 2019 00:19:28 +0200 [thread overview]
Message-ID: <20190619221933.1981-6-laurent@vivier.eu> (raw)
In-Reply-To: <20190619221933.1981-1-laurent@vivier.eu>
Co-developed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Thomas Huth <huth@tuxfamily.org>
---
hw/misc/mac_via.c | 190 ++++++++++++++++++++++++++++++++++++++
include/hw/misc/mac_via.h | 7 ++
2 files changed, 197 insertions(+)
diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c
index baa87c2879..4249632a57 100644
--- a/hw/misc/mac_via.c
+++ b/hw/misc/mac_via.c
@@ -238,10 +238,16 @@
* Table 19-10 ADB transaction states
*/
+#define ADB_STATE_NEW 0
+#define ADB_STATE_EVEN 1
+#define ADB_STATE_ODD 2
+#define ADB_STATE_IDLE 3
+
#define VIA1B_vADB_StateMask (VIA1B_vADBS1 | VIA1B_vADBS2)
#define VIA1B_vADB_StateShift 4
#define VIA_TIMER_FREQ (783360)
+#define VIA_ADB_POLL_FREQ 50 /* XXX: not real */
/* VIA returns time offset from Jan 1, 1904, not 1970 */
#define RTC_OFFSET 2082844800
@@ -423,6 +429,181 @@ static void via1_rtc_update(MacVIAState *m)
}
}
+static int adb_via_poll(MacVIAState *s, int state, uint8_t *data)
+{
+ if (state != ADB_STATE_IDLE) {
+ return 0;
+ }
+
+ if (s->adb_data_in_size < s->adb_data_in_index) {
+ return 0;
+ }
+
+ if (s->adb_data_out_index != 0) {
+ return 0;
+ }
+
+ s->adb_data_in_index = 0;
+ s->adb_data_out_index = 0;
+ s->adb_data_in_size = adb_poll(&s->adb_bus, s->adb_data_in, 0xffff);
+
+ if (s->adb_data_in_size) {
+ *data = s->adb_data_in[s->adb_data_in_index++];
+ qemu_irq_raise(s->adb_data_ready);
+ }
+
+ return s->adb_data_in_size;
+}
+
+static int adb_via_send(MacVIAState *s, int state, uint8_t data)
+{
+ switch (state) {
+ case ADB_STATE_NEW:
+ s->adb_data_out_index = 0;
+ break;
+ case ADB_STATE_EVEN:
+ if ((s->adb_data_out_index & 1) == 0) {
+ return 0;
+ }
+ break;
+ case ADB_STATE_ODD:
+ if (s->adb_data_out_index & 1) {
+ return 0;
+ }
+ break;
+ case ADB_STATE_IDLE:
+ return 0;
+ }
+
+ assert(s->adb_data_out_index < sizeof(s->adb_data_out) - 1);
+
+ s->adb_data_out[s->adb_data_out_index++] = data;
+ qemu_irq_raise(s->adb_data_ready);
+ return 1;
+}
+
+static int adb_via_receive(MacVIAState *s, int state, uint8_t *data)
+{
+ switch (state) {
+ case ADB_STATE_NEW:
+ return 0;
+
+ case ADB_STATE_EVEN:
+ if (s->adb_data_in_size <= 0) {
+ qemu_irq_raise(s->adb_data_ready);
+ return 0;
+ }
+
+ if (s->adb_data_in_index >= s->adb_data_in_size) {
+ *data = 0;
+ qemu_irq_raise(s->adb_data_ready);
+ return 1;
+ }
+
+ if ((s->adb_data_in_index & 1) == 0) {
+ return 0;
+ }
+
+ break;
+
+ case ADB_STATE_ODD:
+ if (s->adb_data_in_size <= 0) {
+ qemu_irq_raise(s->adb_data_ready);
+ return 0;
+ }
+
+ if (s->adb_data_in_index >= s->adb_data_in_size) {
+ *data = 0;
+ qemu_irq_raise(s->adb_data_ready);
+ return 1;
+ }
+
+ if (s->adb_data_in_index & 1) {
+ return 0;
+ }
+
+ break;
+
+ case ADB_STATE_IDLE:
+ if (s->adb_data_out_index == 0) {
+ return 0;
+ }
+
+ s->adb_data_in_size = adb_request(&s->adb_bus, s->adb_data_in,
+ s->adb_data_out,
+ s->adb_data_out_index);
+ s->adb_data_out_index = 0;
+ s->adb_data_in_index = 0;
+ if (s->adb_data_in_size < 0) {
+ *data = 0xff;
+ qemu_irq_raise(s->adb_data_ready);
+ return -1;
+ }
+
+ if (s->adb_data_in_size == 0) {
+ return 0;
+ }
+
+ break;
+ }
+
+ assert(s->adb_data_in_index < sizeof(s->adb_data_in) - 1);
+
+ *data = s->adb_data_in[s->adb_data_in_index++];
+ qemu_irq_raise(s->adb_data_ready);
+ if (*data == 0xff || *data == 0) {
+ return 0;
+ }
+ return 1;
+}
+
+static void via1_adb_update(MacVIAState *m)
+{
+ MOS6522Q800VIA1State *v1s = MOS6522_Q800_VIA1(&m->mos6522_via1);
+ MOS6522State *s = MOS6522(v1s);
+ int state;
+ int ret;
+
+ state = (s->b & VIA1B_vADB_StateMask) >> VIA1B_vADB_StateShift;
+
+ if (s->acr & VIA1ACR_vShiftOut) {
+ /* output mode */
+ ret = adb_via_send(m, state, s->sr);
+ if (ret > 0) {
+ s->b &= ~VIA1B_vADBInt;
+ } else {
+ s->b |= VIA1B_vADBInt;
+ }
+ } else {
+ /* input mode */
+ ret = adb_via_receive(m, state, &s->sr);
+ if (ret > 0 && s->sr != 0xff) {
+ s->b &= ~VIA1B_vADBInt;
+ } else {
+ s->b |= VIA1B_vADBInt;
+ }
+ }
+}
+
+static void via_adb_poll(void *opaque)
+{
+ MacVIAState *m = opaque;
+ MOS6522Q800VIA1State *v1s = MOS6522_Q800_VIA1(&m->mos6522_via1);
+ MOS6522State *s = MOS6522(v1s);
+ int state;
+
+ if (s->b & VIA1B_vADBInt) {
+ state = (s->b & VIA1B_vADB_StateMask) >> VIA1B_vADB_StateShift;
+ if (adb_via_poll(m, 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 uint64_t mos6522_q800_via1_read(void *opaque, hwaddr addr, unsigned size)
{
MOS6522Q800VIA1State *s = MOS6522_Q800_VIA1(opaque);
@@ -485,6 +666,10 @@ static void mac_via_reset(DeviceState *dev)
{
MacVIAState *m = MAC_VIA(dev);
+ timer_mod(m->adb_poll_timer,
+ qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+ (NANOSECONDS_PER_SECOND / VIA_ADB_POLL_FREQ));
+
timer_mod(m->VBL_timer, (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + 16630)
/ 16630 * 16630);
@@ -523,6 +708,10 @@ static void mac_via_realize(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);
+ m->adb_data_ready = qdev_get_gpio_in_named(dev, "via1-irq",
+ VIA1_IRQ_ADB_READY_BIT);
}
static void mac_via_init(Object *obj)
@@ -571,6 +760,7 @@ static void mos6522_q800_via1_portB_write(MOS6522State *s)
MacVIAState *m = container_of(v1s, MacVIAState, mos6522_via1);
via1_rtc_update(m);
+ via1_adb_update(m);
v1s->last_b = s->b;
}
diff --git a/include/hw/misc/mac_via.h b/include/hw/misc/mac_via.h
index 69bdecabb0..2181140293 100644
--- a/include/hw/misc/mac_via.h
+++ b/include/hw/misc/mac_via.h
@@ -97,6 +97,13 @@ typedef struct MacVIAState {
/* ADB */
ADBBusState adb_bus;
+ QEMUTimer *adb_poll_timer;
+ qemu_irq adb_data_ready;
+ int adb_data_in_size;
+ int adb_data_in_index;
+ int adb_data_out_index;
+ uint8_t adb_data_in[128];
+ uint8_t adb_data_out[16];
/* external timers */
QEMUTimer *one_second_timer;
--
2.21.0
next prev parent reply other threads:[~2019-06-19 22:28 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-19 22:19 [Qemu-devel] [PATCH v8 00/10] hw/m68k: add Apple Machintosh Quadra 800 machine Laurent Vivier
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 01/10] escc: introduce a selector for the register bit Laurent Vivier
2019-06-21 14:09 ` Philippe Mathieu-Daudé
2019-06-24 20:00 ` Laurent Vivier
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 02/10] esp: add pseudo-DMA as used by Macintosh Laurent Vivier
2019-06-24 20:04 ` Laurent Vivier
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 03/10] dp8393x: manage big endian bus Laurent Vivier
2019-06-24 20:07 ` Laurent Vivier
2019-06-25 15:57 ` Philippe Mathieu-Daudé
2019-06-25 17:09 ` Laurent Vivier
2019-06-26 8:57 ` Philippe Mathieu-Daudé
2019-06-26 10:11 ` Laurent Vivier
2019-06-26 17:49 ` Philippe Mathieu-Daudé
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 04/10] hw/m68k: add via support Laurent Vivier
2019-06-19 22:19 ` Laurent Vivier [this message]
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 06/10] hw/m68k: add macfb video card Laurent Vivier
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 07/10] hw/m68k: add Nubus support Laurent Vivier
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 08/10] hw/m68k: add Nubus support for macfb video card Laurent Vivier
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 09/10] hw/m68k: add a dummy SWIM floppy controller Laurent Vivier
2019-06-19 22:19 ` [Qemu-devel] [PATCH v8 10/10] hw/m68k: define Macintosh Quadra 800 Laurent Vivier
2019-06-25 16:30 ` Thomas Huth
2019-06-26 17:51 ` Philippe Mathieu-Daudé
2019-06-26 18:32 ` Thomas Huth
2019-06-19 22:42 ` [Qemu-devel] [PATCH v8 00/10] hw/m68k: add Apple Machintosh Quadra 800 machine no-reply
2019-06-22 14:22 ` Mark Cave-Ayland
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