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serial: add 2x + 4x pci variant 

Add multiport serial card implementation, with two variants, one
featuring two and one featuring four ports.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2012-10-17 09:54:22 +02:00 committed by Anthony Liguori
parent fe4f1793a6
commit d66bbea4e0
1 changed files with 149 additions and 0 deletions
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149
hw/serial-pci.c
View File

@ -26,11 +26,23 @@
#include "serial.h"
#include "pci.h"
#define PCI_SERIAL_MAX_PORTS 4
typedef struct PCISerialState {
PCIDevice dev;
SerialState state;
} PCISerialState;
typedef struct PCIMultiSerialState {
PCIDevice dev;
MemoryRegion iobar;
uint32_t ports;
char *name[PCI_SERIAL_MAX_PORTS];
SerialState state[PCI_SERIAL_MAX_PORTS];
uint32_t level[PCI_SERIAL_MAX_PORTS];
qemu_irq *irqs;
} PCIMultiSerialState;
static int serial_pci_init(PCIDevice *dev)
{
PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
@ -47,6 +59,56 @@ static int serial_pci_init(PCIDevice *dev)
return 0;
}
static void multi_serial_irq_mux(void *opaque, int n, int level)
{
PCIMultiSerialState *pci = opaque;
int i, pending = 0;
pci->level[n] = level;
for (i = 0; i < pci->ports; i++) {
if (pci->level[i]) {
pending = 1;
}
}
qemu_set_irq(pci->dev.irq[0], pending);
}
static int multi_serial_pci_init(PCIDevice *dev)
{
PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);
PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev);
SerialState *s;
int i;
switch (pc->device_id) {
case 0x0003:
pci->ports = 2;
break;
case 0x0004:
pci->ports = 4;
break;
}
assert(pci->ports > 0);
assert(pci->ports <= PCI_SERIAL_MAX_PORTS);
pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
memory_region_init(&pci->iobar, "multiserial", 8 * pci->ports);
pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &pci->iobar);
pci->irqs = qemu_allocate_irqs(multi_serial_irq_mux, pci,
pci->ports);
for (i = 0; i < pci->ports; i++) {
s = pci->state + i;
s->baudbase = 115200;
serial_init_core(s);
s->irq = pci->irqs[i];
pci->name[i] = g_strdup_printf("uart #%d", i+1);
memory_region_init_io(&s->io, &serial_io_ops, s, pci->name[i], 8);
memory_region_add_subregion(&pci->iobar, 8 * i, &s->io);
}
return 0;
}
static void serial_pci_exit(PCIDevice *dev)
{
PCISerialState *pci = DO_UPCAST(PCISerialState, dev, dev);
@ -56,6 +118,22 @@ static void serial_pci_exit(PCIDevice *dev)
memory_region_destroy(&s->io);
}
static void multi_serial_pci_exit(PCIDevice *dev)
{
PCIMultiSerialState *pci = DO_UPCAST(PCIMultiSerialState, dev, dev);
SerialState *s;
int i;
for (i = 0; i < pci->ports; i++) {
s = pci->state + i;
serial_exit_core(s);
memory_region_destroy(&s->io);
g_free(pci->name[i]);
}
memory_region_destroy(&pci->iobar);
qemu_free_irqs(pci->irqs);
}
static const VMStateDescription vmstate_pci_serial = {
.name = "pci-serial",
.version_id = 1,
@ -67,11 +145,38 @@ static const VMStateDescription vmstate_pci_serial = {
}
};
static const VMStateDescription vmstate_pci_multi_serial = {
.name = "pci-serial-multi",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, PCIMultiSerialState),
VMSTATE_STRUCT_ARRAY(state, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS,
0, vmstate_serial, SerialState),
VMSTATE_UINT32_ARRAY(level, PCIMultiSerialState, PCI_SERIAL_MAX_PORTS),
VMSTATE_END_OF_LIST()
}
};
static Property serial_pci_properties[] = {
DEFINE_PROP_CHR("chardev", PCISerialState, state.chr),
DEFINE_PROP_END_OF_LIST(),
};
static Property multi_2x_serial_pci_properties[] = {
DEFINE_PROP_CHR("chardev1", PCIMultiSerialState, state[0].chr),
DEFINE_PROP_CHR("chardev2", PCIMultiSerialState, state[1].chr),
DEFINE_PROP_END_OF_LIST(),
};
static Property multi_4x_serial_pci_properties[] = {
DEFINE_PROP_CHR("chardev1", PCIMultiSerialState, state[0].chr),
DEFINE_PROP_CHR("chardev2", PCIMultiSerialState, state[1].chr),
DEFINE_PROP_CHR("chardev3", PCIMultiSerialState, state[2].chr),
DEFINE_PROP_CHR("chardev4", PCIMultiSerialState, state[3].chr),
DEFINE_PROP_END_OF_LIST(),
};
static void serial_pci_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@ -86,6 +191,34 @@ static void serial_pci_class_initfn(ObjectClass *klass, void *data)
dc->props = serial_pci_properties;
}
static void multi_2x_serial_pci_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
pc->init = multi_serial_pci_init;
pc->exit = multi_serial_pci_exit;
pc->vendor_id = 0x1b36; /* Red Hat */
pc->device_id = 0x0003;
pc->revision = 1;
pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
dc->vmsd = &vmstate_pci_multi_serial;
dc->props = multi_2x_serial_pci_properties;
}
static void multi_4x_serial_pci_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
pc->init = multi_serial_pci_init;
pc->exit = multi_serial_pci_exit;
pc->vendor_id = 0x1b36; /* Red Hat */
pc->device_id = 0x0004;
pc->revision = 1;
pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
dc->vmsd = &vmstate_pci_multi_serial;
dc->props = multi_4x_serial_pci_properties;
}
static TypeInfo serial_pci_info = {
.name = "pci-serial",
.parent = TYPE_PCI_DEVICE,
@ -93,9 +226,25 @@ static TypeInfo serial_pci_info = {
.class_init = serial_pci_class_initfn,
};
static TypeInfo multi_2x_serial_pci_info = {
.name = "pci-serial-2x",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIMultiSerialState),
.class_init = multi_2x_serial_pci_class_initfn,
};
static TypeInfo multi_4x_serial_pci_info = {
.name = "pci-serial-4x",
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(PCIMultiSerialState),
.class_init = multi_4x_serial_pci_class_initfn,
};
static void serial_pci_register_types(void)
{
type_register_static(&serial_pci_info);
type_register_static(&multi_2x_serial_pci_info);
type_register_static(&multi_4x_serial_pci_info);
}
type_init(serial_pci_register_types)