From d66bbea4e0d3faec69e8aa73789a2d1dc3b8312f Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Wed, 17 Oct 2012 09:54:22 +0200 Subject: [PATCH] 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 Signed-off-by: Anthony Liguori --- hw/serial-pci.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) diff --git a/hw/serial-pci.c b/hw/serial-pci.c index 6fcf1170b3..badd297220 100644 --- a/hw/serial-pci.c +++ b/hw/serial-pci.c @@ -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)