aboutsummaryrefslogtreecommitdiff
path: root/hw/parallel.c
diff options
context:
space:
mode:
authorbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-11-10 23:58:52 +0000
committerbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-11-10 23:58:52 +0000
commite57a8c0eefcf648bd0f357abd94ee2871888f43d (patch)
tree6977dc86170d203c2beeb039c3f2b9a8c49efbf0 /hw/parallel.c
parent2122c51a9c9d5935773d3a542248bd8f369b172c (diff)
downloadqemu-e57a8c0eefcf648bd0f357abd94ee2871888f43d.zip
qemu-e57a8c0eefcf648bd0f357abd94ee2871888f43d.tar.gz
qemu-e57a8c0eefcf648bd0f357abd94ee2871888f43d.tar.bz2
low level host parallel port access
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1611 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw/parallel.c')
-rw-r--r--hw/parallel.c94
1 files changed, 58 insertions, 36 deletions
diff --git a/hw/parallel.c b/hw/parallel.c
index a304d7f..95ac7fd 100644
--- a/hw/parallel.c
+++ b/hw/parallel.c
@@ -1,7 +1,7 @@
/*
* QEMU Parallel PORT emulation
*
- * Copyright (c) 2003-2004 Fabrice Bellard
+ * Copyright (c) 2003-2005 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -50,6 +50,7 @@ struct ParallelState {
int irq;
int irq_pending;
CharDriverState *chr;
+ int hw_driver;
};
static void parallel_update_irq(ParallelState *s)
@@ -70,29 +71,39 @@ static void parallel_ioport_write(void *opaque, uint32_t addr, uint32_t val)
#endif
switch(addr) {
case 0:
- s->data = val;
- parallel_update_irq(s);
+ if (s->hw_driver) {
+ s->data = val;
+ qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_DATA, &s->data);
+ } else {
+ s->data = val;
+ parallel_update_irq(s);
+ }
break;
case 2:
- if ((val & PARA_CTR_INIT) == 0 ) {
- s->status = PARA_STS_BUSY;
- s->status |= PARA_STS_ACK;
- s->status |= PARA_STS_ONLINE;
- s->status |= PARA_STS_ERROR;
- }
- else if (val & PARA_CTR_SELECT) {
- if (val & PARA_CTR_STROBE) {
- s->status &= ~PARA_STS_BUSY;
- if ((s->control & PARA_CTR_STROBE) == 0)
- qemu_chr_write(s->chr, &s->data, 1);
- } else {
- if (s->control & PARA_CTR_INTEN) {
- s->irq_pending = 1;
+ if (s->hw_driver) {
+ s->control = val;
+ qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_CONTROL, &s->control);
+ } else {
+ if ((val & PARA_CTR_INIT) == 0 ) {
+ s->status = PARA_STS_BUSY;
+ s->status |= PARA_STS_ACK;
+ s->status |= PARA_STS_ONLINE;
+ s->status |= PARA_STS_ERROR;
+ }
+ else if (val & PARA_CTR_SELECT) {
+ if (val & PARA_CTR_STROBE) {
+ s->status &= ~PARA_STS_BUSY;
+ if ((s->control & PARA_CTR_STROBE) == 0)
+ qemu_chr_write(s->chr, &s->data, 1);
+ } else {
+ if (s->control & PARA_CTR_INTEN) {
+ s->irq_pending = 1;
+ }
}
}
+ parallel_update_irq(s);
+ s->control = val;
}
- parallel_update_irq(s);
- s->control = val;
break;
}
}
@@ -105,24 +116,35 @@ static uint32_t parallel_ioport_read(void *opaque, uint32_t addr)
addr &= 7;
switch(addr) {
case 0:
+ if (s->hw_driver) {
+ qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_DATA, &s->data);
+ }
ret = s->data;
break;
case 1:
- ret = s->status;
- s->irq_pending = 0;
- if ((s->status & PARA_STS_BUSY) == 0 && (s->control & PARA_CTR_STROBE) == 0) {
- /* XXX Fixme: wait 5 microseconds */
- if (s->status & PARA_STS_ACK)
- s->status &= ~PARA_STS_ACK;
- else {
- /* XXX Fixme: wait 5 microseconds */
- s->status |= PARA_STS_ACK;
- s->status |= PARA_STS_BUSY;
+ if (s->hw_driver) {
+ qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_STATUS, &s->status);
+ ret = s->status;
+ } else {
+ ret = s->status;
+ s->irq_pending = 0;
+ if ((s->status & PARA_STS_BUSY) == 0 && (s->control & PARA_CTR_STROBE) == 0) {
+ /* XXX Fixme: wait 5 microseconds */
+ if (s->status & PARA_STS_ACK)
+ s->status &= ~PARA_STS_ACK;
+ else {
+ /* XXX Fixme: wait 5 microseconds */
+ s->status |= PARA_STS_ACK;
+ s->status |= PARA_STS_BUSY;
+ }
}
+ parallel_update_irq(s);
}
- parallel_update_irq(s);
break;
case 2:
+ if (s->hw_driver) {
+ qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_CONTROL, &s->control);
+ }
ret = s->control;
break;
}
@@ -153,18 +175,20 @@ static void parallel_receive1(void *opaque, const uint8_t *buf, int size)
parallel_receive_byte(s, buf[0]);
}
-static void parallel_event(void *opaque, int event)
-{
-}
-
/* If fd is zero, it means that the parallel device uses the console */
ParallelState *parallel_init(int base, int irq, CharDriverState *chr)
{
ParallelState *s;
+ uint8_t dummy;
s = qemu_mallocz(sizeof(ParallelState));
if (!s)
return NULL;
+ s->chr = chr;
+ s->hw_driver = 0;
+ if (qemu_chr_ioctl(chr, CHR_IOCTL_PP_READ_STATUS, &dummy) == 0)
+ s->hw_driver = 1;
+
s->irq = irq;
s->data = 0;
s->status = PARA_STS_BUSY;
@@ -176,8 +200,6 @@ ParallelState *parallel_init(int base, int irq, CharDriverState *chr)
register_ioport_write(base, 8, 1, parallel_ioport_write, s);
register_ioport_read(base, 8, 1, parallel_ioport_read, s);
- s->chr = chr;
qemu_chr_add_read_handler(chr, parallel_can_receive1, parallel_receive1, s);
- qemu_chr_add_event_handler(chr, parallel_event);
return s;
}