hw/net/can/can_pcm3680_pci.c - qemu - Git at Google

 /*
  * PCM-3680i PCI CAN device (SJA1000 based) emulation
  *
  * Copyright (c) 2016 Deniz Eren (deniz.eren@icloud.com)
  *
  * Based on Kvaser PCI CAN device (SJA1000 based) emulation implemented by
  * Jin Yang and Pavel Pisa
  *
  * 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.
  */

 #include "qemu/osdep.h"
 #include "qemu/event_notifier.h"
 #include "qemu/module.h"
 #include "qemu/thread.h"
 #include "qemu/sockets.h"
 #include "qapi/error.h"
 #include "chardev/char.h"
 #include "hw/irq.h"
 #include "hw/pci/pci_device.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 #include "net/can_emu.h"

 #include "can_sja1000.h"
 #include "qom/object.h"

 #define TYPE_CAN_PCI_DEV "pcm3680_pci"

 typedef struct Pcm3680iPCIState Pcm3680iPCIState;
 DECLARE_INSTANCE_CHECKER(Pcm3680iPCIState, PCM3680i_PCI_DEV,
                          TYPE_CAN_PCI_DEV)

 /* the PCI device and vendor IDs */
 #ifndef PCM3680i_PCI_VENDOR_ID1
 #define PCM3680i_PCI_VENDOR_ID1     0x13fe
 #endif

 #ifndef PCM3680i_PCI_DEVICE_ID1
 #define PCM3680i_PCI_DEVICE_ID1     0xc002
 #endif

 #define PCM3680i_PCI_SJA_COUNT     2
 #define PCM3680i_PCI_SJA_RANGE     0x100

 #define PCM3680i_PCI_BYTES_PER_SJA 0x20

 struct Pcm3680iPCIState {
     /*< private >*/
     PCIDevice       dev;
     /*< public >*/
     MemoryRegion    sja_io[PCM3680i_PCI_SJA_COUNT];

     CanSJA1000State sja_state[PCM3680i_PCI_SJA_COUNT];
     qemu_irq        irq;

     char            *model; /* The model that support, only SJA1000 now. */
     CanBusState     *canbus[PCM3680i_PCI_SJA_COUNT];
 };

 static void pcm3680i_pci_reset(DeviceState *dev)
 {
     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(dev);
     int i;

     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
         can_sja_hardware_reset(&d->sja_state[i]);
     }
 }

 static uint64_t pcm3680i_pci_sja1_io_read(void *opaque, hwaddr addr,
                                           unsigned size)
 {
     Pcm3680iPCIState *d = opaque;
     CanSJA1000State *s = &d->sja_state[0];

     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
         return 0;
     }

     return can_sja_mem_read(s, addr, size);
 }

 static void pcm3680i_pci_sja1_io_write(void *opaque, hwaddr addr,
                                        uint64_t data, unsigned size)
 {
     Pcm3680iPCIState *d = opaque;
     CanSJA1000State *s = &d->sja_state[0];

     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
         return;
     }

     can_sja_mem_write(s, addr, data, size);
 }

 static uint64_t pcm3680i_pci_sja2_io_read(void *opaque, hwaddr addr,
                                           unsigned size)
 {
     Pcm3680iPCIState *d = opaque;
     CanSJA1000State *s = &d->sja_state[1];

     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
         return 0;
     }

     return can_sja_mem_read(s, addr, size);
 }

 static void pcm3680i_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data,
                              unsigned size)
 {
     Pcm3680iPCIState *d = opaque;
     CanSJA1000State *s = &d->sja_state[1];

     if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
         return;
     }

     can_sja_mem_write(s, addr, data, size);
 }

 static const MemoryRegionOps pcm3680i_pci_sja1_io_ops = {
     .read = pcm3680i_pci_sja1_io_read,
     .write = pcm3680i_pci_sja1_io_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl = {
         .max_access_size = 1,
     },
 };

 static const MemoryRegionOps pcm3680i_pci_sja2_io_ops = {
     .read = pcm3680i_pci_sja2_io_read,
     .write = pcm3680i_pci_sja2_io_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl = {
         .max_access_size = 1,
     },
 };

 static void pcm3680i_pci_realize(PCIDevice *pci_dev, Error **errp)
 {
     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev);
     uint8_t *pci_conf;
     int i;

     pci_conf = pci_dev->config;
     pci_conf[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin A */

     d->irq = pci_allocate_irq(&d->dev);

     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
         can_sja_init(&d->sja_state[i], d->irq);
     }

     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
         if (can_sja_connect_to_bus(&d->sja_state[i], d->canbus[i]) < 0) {
             error_setg(errp, "can_sja_connect_to_bus failed");
             return;
         }
     }

     memory_region_init_io(&d->sja_io[0], OBJECT(d), &pcm3680i_pci_sja1_io_ops,
                           d, "pcm3680i_pci-sja1", PCM3680i_PCI_SJA_RANGE);

     memory_region_init_io(&d->sja_io[1], OBJECT(d), &pcm3680i_pci_sja2_io_ops,
                           d, "pcm3680i_pci-sja2", PCM3680i_PCI_SJA_RANGE);

     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
         pci_register_bar(&d->dev, /*BAR*/ i, PCI_BASE_ADDRESS_SPACE_IO,
                          &d->sja_io[i]);
     }
 }

 static void pcm3680i_pci_exit(PCIDevice *pci_dev)
 {
     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev);
     int i;

     for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
         can_sja_disconnect(&d->sja_state[i]);
     }

     qemu_free_irq(d->irq);
 }

 static const VMStateDescription vmstate_pcm3680i_pci = {
     .name = "pcm3680i_pci",
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_PCI_DEVICE(dev, Pcm3680iPCIState),
         VMSTATE_STRUCT(sja_state[0], Pcm3680iPCIState, 0,
                        vmstate_can_sja, CanSJA1000State),
         VMSTATE_STRUCT(sja_state[1], Pcm3680iPCIState, 0,
                        vmstate_can_sja, CanSJA1000State),
         VMSTATE_END_OF_LIST()
     }
 };

 static void pcm3680i_pci_instance_init(Object *obj)
 {
     Pcm3680iPCIState *d = PCM3680i_PCI_DEV(obj);

     object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
                              (Object **)&d->canbus[0],
                              qdev_prop_allow_set_link_before_realize,
                              0);
     object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
                              (Object **)&d->canbus[1],
                              qdev_prop_allow_set_link_before_realize,
                              0);
 }

 static void pcm3680i_pci_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->realize = pcm3680i_pci_realize;
     k->exit = pcm3680i_pci_exit;
     k->vendor_id = PCM3680i_PCI_VENDOR_ID1;
     k->device_id = PCM3680i_PCI_DEVICE_ID1;
     k->revision = 0x00;
     k->class_id = 0x000c09;
     k->subsystem_vendor_id = PCM3680i_PCI_VENDOR_ID1;
     k->subsystem_id = PCM3680i_PCI_DEVICE_ID1;
     dc->desc = "Pcm3680i PCICANx";
     dc->vmsd = &vmstate_pcm3680i_pci;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     dc->reset = pcm3680i_pci_reset;
 }

 static const TypeInfo pcm3680i_pci_info = {
     .name          = TYPE_CAN_PCI_DEV,
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(Pcm3680iPCIState),
     .class_init    = pcm3680i_pci_class_init,
     .instance_init = pcm3680i_pci_instance_init,
     .interfaces = (InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static void pcm3680i_pci_register_types(void)
 {
     type_register_static(&pcm3680i_pci_info);
 }

 type_init(pcm3680i_pci_register_types)
	/*
	* PCM-3680i PCI CAN device (SJA1000 based) emulation
	*
	* Copyright (c) 2016 Deniz Eren (deniz.eren@icloud.com)
	*
	* Based on Kvaser PCI CAN device (SJA1000 based) emulation implemented by
	* Jin Yang and Pavel Pisa
	*
	* 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.
	*/

	#include "qemu/osdep.h"
	#include "qemu/event_notifier.h"
	#include "qemu/module.h"
	#include "qemu/thread.h"
	#include "qemu/sockets.h"
	#include "qapi/error.h"
	#include "chardev/char.h"
	#include "hw/irq.h"
	#include "hw/pci/pci_device.h"
	#include "hw/qdev-properties.h"
	#include "migration/vmstate.h"
	#include "net/can_emu.h"

	#include "can_sja1000.h"
	#include "qom/object.h"

	#define TYPE_CAN_PCI_DEV "pcm3680_pci"

	typedef struct Pcm3680iPCIState Pcm3680iPCIState;
	DECLARE_INSTANCE_CHECKER(Pcm3680iPCIState, PCM3680i_PCI_DEV,
	TYPE_CAN_PCI_DEV)

	/* the PCI device and vendor IDs */
	#ifndef PCM3680i_PCI_VENDOR_ID1
	#define PCM3680i_PCI_VENDOR_ID1 0x13fe
	#endif

	#ifndef PCM3680i_PCI_DEVICE_ID1
	#define PCM3680i_PCI_DEVICE_ID1 0xc002
	#endif

	#define PCM3680i_PCI_SJA_COUNT 2
	#define PCM3680i_PCI_SJA_RANGE 0x100

	#define PCM3680i_PCI_BYTES_PER_SJA 0x20

	struct Pcm3680iPCIState {
	/< private >/
	PCIDevice dev;
	/< public >/
	MemoryRegion sja_io[PCM3680i_PCI_SJA_COUNT];

	CanSJA1000State sja_state[PCM3680i_PCI_SJA_COUNT];
	qemu_irq irq;

	char model; / The model that support, only SJA1000 now. */
	CanBusState *canbus[PCM3680i_PCI_SJA_COUNT];
	};

	static void pcm3680i_pci_reset(DeviceState *dev)
	{
	Pcm3680iPCIState *d = PCM3680i_PCI_DEV(dev);
	int i;

	for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
	can_sja_hardware_reset(&d->sja_state[i]);
	}
	}

	static uint64_t pcm3680i_pci_sja1_io_read(void *opaque, hwaddr addr,
	unsigned size)
	{
	Pcm3680iPCIState *d = opaque;
	CanSJA1000State *s = &d->sja_state[0];

	if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
	return 0;
	}

	return can_sja_mem_read(s, addr, size);
	}

	static void pcm3680i_pci_sja1_io_write(void *opaque, hwaddr addr,
	uint64_t data, unsigned size)
	{
	Pcm3680iPCIState *d = opaque;
	CanSJA1000State *s = &d->sja_state[0];

	if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
	return;
	}

	can_sja_mem_write(s, addr, data, size);
	}

	static uint64_t pcm3680i_pci_sja2_io_read(void *opaque, hwaddr addr,
	unsigned size)
	{
	Pcm3680iPCIState *d = opaque;
	CanSJA1000State *s = &d->sja_state[1];

	if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
	return 0;
	}

	return can_sja_mem_read(s, addr, size);
	}

	static void pcm3680i_pci_sja2_io_write(void *opaque, hwaddr addr, uint64_t data,
	unsigned size)
	{
	Pcm3680iPCIState *d = opaque;
	CanSJA1000State *s = &d->sja_state[1];

	if (addr >= PCM3680i_PCI_BYTES_PER_SJA) {
	return;
	}

	can_sja_mem_write(s, addr, data, size);
	}

	static const MemoryRegionOps pcm3680i_pci_sja1_io_ops = {
	.read = pcm3680i_pci_sja1_io_read,
	.write = pcm3680i_pci_sja1_io_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	.impl = {
	.max_access_size = 1,
	},
	};

	static const MemoryRegionOps pcm3680i_pci_sja2_io_ops = {
	.read = pcm3680i_pci_sja2_io_read,
	.write = pcm3680i_pci_sja2_io_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	.impl = {
	.max_access_size = 1,
	},
	};

	static void pcm3680i_pci_realize(PCIDevice pci_dev, Error *errp)
	{
	Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev);
	uint8_t *pci_conf;
	int i;

	pci_conf = pci_dev->config;
	pci_conf[PCI_INTERRUPT_PIN] = 0x01; /* interrupt pin A */

	d->irq = pci_allocate_irq(&d->dev);

	for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
	can_sja_init(&d->sja_state[i], d->irq);
	}

	for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
	if (can_sja_connect_to_bus(&d->sja_state[i], d->canbus[i]) < 0) {
	error_setg(errp, "can_sja_connect_to_bus failed");
	return;
	}
	}

	memory_region_init_io(&d->sja_io[0], OBJECT(d), &pcm3680i_pci_sja1_io_ops,
	d, "pcm3680i_pci-sja1", PCM3680i_PCI_SJA_RANGE);

	memory_region_init_io(&d->sja_io[1], OBJECT(d), &pcm3680i_pci_sja2_io_ops,
	d, "pcm3680i_pci-sja2", PCM3680i_PCI_SJA_RANGE);

	for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
	pci_register_bar(&d->dev, /BAR/ i, PCI_BASE_ADDRESS_SPACE_IO,
	&d->sja_io[i]);
	}
	}

	static void pcm3680i_pci_exit(PCIDevice *pci_dev)
	{
	Pcm3680iPCIState *d = PCM3680i_PCI_DEV(pci_dev);
	int i;

	for (i = 0; i < PCM3680i_PCI_SJA_COUNT; i++) {
	can_sja_disconnect(&d->sja_state[i]);
	}

	qemu_free_irq(d->irq);
	}

	static const VMStateDescription vmstate_pcm3680i_pci = {
	.name = "pcm3680i_pci",
	.version_id = 1,
	.minimum_version_id = 1,
	.fields = (VMStateField[]) {
	VMSTATE_PCI_DEVICE(dev, Pcm3680iPCIState),
	VMSTATE_STRUCT(sja_state[0], Pcm3680iPCIState, 0,
	vmstate_can_sja, CanSJA1000State),
	VMSTATE_STRUCT(sja_state[1], Pcm3680iPCIState, 0,
	vmstate_can_sja, CanSJA1000State),
	VMSTATE_END_OF_LIST()
	}
	};

	static void pcm3680i_pci_instance_init(Object *obj)
	{
	Pcm3680iPCIState *d = PCM3680i_PCI_DEV(obj);

	object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
	(Object **)&d->canbus[0],
	qdev_prop_allow_set_link_before_realize,
	0);
	object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
	(Object **)&d->canbus[1],
	qdev_prop_allow_set_link_before_realize,
	0);
	}

	static void pcm3680i_pci_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->realize = pcm3680i_pci_realize;
	k->exit = pcm3680i_pci_exit;
	k->vendor_id = PCM3680i_PCI_VENDOR_ID1;
	k->device_id = PCM3680i_PCI_DEVICE_ID1;
	k->revision = 0x00;
	k->class_id = 0x000c09;
	k->subsystem_vendor_id = PCM3680i_PCI_VENDOR_ID1;
	k->subsystem_id = PCM3680i_PCI_DEVICE_ID1;
	dc->desc = "Pcm3680i PCICANx";
	dc->vmsd = &vmstate_pcm3680i_pci;
	set_bit(DEVICE_CATEGORY_MISC, dc->categories);
	dc->reset = pcm3680i_pci_reset;
	}

	static const TypeInfo pcm3680i_pci_info = {
	.name = TYPE_CAN_PCI_DEV,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(Pcm3680iPCIState),
	.class_init = pcm3680i_pci_class_init,
	.instance_init = pcm3680i_pci_instance_init,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static void pcm3680i_pci_register_types(void)
	{
	type_register_static(&pcm3680i_pci_info);
	}

	type_init(pcm3680i_pci_register_types)