hw/char/serial-pci.c - qemu - Git at Google

 /*
  * QEMU 16550A UART emulation
  *
  * Copyright (c) 2003-2004 Fabrice Bellard
  * Copyright (c) 2008 Citrix Systems, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */

 /* see docs/specs/pci-serial.txt */

 #include "hw/char/serial.h"
 #include "hw/pci/pci.h"
 #include "qapi/qmp/qerror.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);
     SerialState *s = &pci->state;
     Error *err = NULL;

     s->baudbase = 115200;
     serial_realize_core(s, &err);
     if (err != NULL) {
         qerror_report_err(err);
         error_free(err);
         return -1;
     }

     pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
     s->irq = pci->dev.irq[0];

     memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8);
     pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
     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;
     Error *err = NULL;
     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_realize_core(s, &err);
         if (err != NULL) {
             qerror_report_err(err);
             error_free(err);
             return -1;
         }
         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);
     SerialState *s = &pci->state;

     serial_exit_core(s);
     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,
     .minimum_version_id = 1,
     .fields      = (VMStateField[]) {
         VMSTATE_PCI_DEVICE(dev, PCISerialState),
         VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
         VMSTATE_END_OF_LIST()
     }
 };

 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);
     PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
     pc->init = serial_pci_init;
     pc->exit = serial_pci_exit;
     pc->vendor_id = PCI_VENDOR_ID_REDHAT;
     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
     pc->revision = 1;
     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
     dc->vmsd = &vmstate_pci_serial;
     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 = PCI_VENDOR_ID_REDHAT;
     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL2;
     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 = PCI_VENDOR_ID_REDHAT;
     pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL4;
     pc->revision = 1;
     pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
     dc->vmsd = &vmstate_pci_multi_serial;
     dc->props = multi_4x_serial_pci_properties;
 }

 static const TypeInfo serial_pci_info = {
     .name          = "pci-serial",
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PCISerialState),
     .class_init    = serial_pci_class_initfn,
 };

 static const 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 const 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)
	/*
	* QEMU 16550A UART emulation
	*
	* Copyright (c) 2003-2004 Fabrice Bellard
	* Copyright (c) 2008 Citrix Systems, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/

	/* see docs/specs/pci-serial.txt */

	#include "hw/char/serial.h"
	#include "hw/pci/pci.h"
	#include "qapi/qmp/qerror.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);
	SerialState *s = &pci->state;
	Error *err = NULL;

	s->baudbase = 115200;
	serial_realize_core(s, &err);
	if (err != NULL) {
	qerror_report_err(err);
	error_free(err);
	return -1;
	}

	pci->dev.config[PCI_INTERRUPT_PIN] = 0x01;
	s->irq = pci->dev.irq[0];

	memory_region_init_io(&s->io, &serial_io_ops, s, "serial", 8);
	pci_register_bar(&pci->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
	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;
	Error *err = NULL;
	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_realize_core(s, &err);
	if (err != NULL) {
	qerror_report_err(err);
	error_free(err);
	return -1;
	}
	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);
	SerialState *s = &pci->state;

	serial_exit_core(s);
	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,
	.minimum_version_id = 1,
	.fields = (VMStateField[]) {
	VMSTATE_PCI_DEVICE(dev, PCISerialState),
	VMSTATE_STRUCT(state, PCISerialState, 0, vmstate_serial, SerialState),
	VMSTATE_END_OF_LIST()
	}
	};

	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);
	PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass);
	pc->init = serial_pci_init;
	pc->exit = serial_pci_exit;
	pc->vendor_id = PCI_VENDOR_ID_REDHAT;
	pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL;
	pc->revision = 1;
	pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
	dc->vmsd = &vmstate_pci_serial;
	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 = PCI_VENDOR_ID_REDHAT;
	pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL2;
	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 = PCI_VENDOR_ID_REDHAT;
	pc->device_id = PCI_DEVICE_ID_REDHAT_SERIAL4;
	pc->revision = 1;
	pc->class_id = PCI_CLASS_COMMUNICATION_SERIAL;
	dc->vmsd = &vmstate_pci_multi_serial;
	dc->props = multi_4x_serial_pci_properties;
	}

	static const TypeInfo serial_pci_info = {
	.name = "pci-serial",
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(PCISerialState),
	.class_init = serial_pci_class_initfn,
	};

	static const 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 const 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)