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

 /*
  * CTU CAN FD PCI device emulation
  * http://canbus.pages.fel.cvut.cz/
  *
  * Copyright (c) 2019 Jan Charvat (jancharvat.charvat@gmail.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/module.h"
 #include "qapi/error.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 "ctucan_core.h"

 #define TYPE_CTUCAN_PCI_DEV "ctucan_pci"

 typedef struct CtuCanPCIState CtuCanPCIState;
 DECLARE_INSTANCE_CHECKER(CtuCanPCIState, CTUCAN_PCI_DEV,
                          TYPE_CTUCAN_PCI_DEV)

 #define CTUCAN_PCI_CORE_COUNT     2
 #define CTUCAN_PCI_CORE_RANGE     0x10000

 #define CTUCAN_PCI_BAR_COUNT      2

 #define CTUCAN_PCI_BYTES_PER_CORE 0x4000

 #ifndef PCI_VENDOR_ID_TEDIA
 #define PCI_VENDOR_ID_TEDIA 0x1760
 #endif

 #define PCI_DEVICE_ID_TEDIA_CTUCAN_VER21 0xff00

 #define CTUCAN_BAR0_RANGE 0x8000
 #define CTUCAN_BAR0_CTUCAN_ID 0x0000
 #define CTUCAN_BAR0_CRA_BASE  0x4000
 #define CYCLONE_IV_CRA_A2P_IE (0x0050)

 #define CTUCAN_WITHOUT_CTUCAN_ID  0
 #define CTUCAN_WITH_CTUCAN_ID     1

 struct CtuCanPCIState {
     /*< private >*/
     PCIDevice       dev;
     /*< public >*/
     MemoryRegion    ctucan_io[CTUCAN_PCI_BAR_COUNT];

     CtuCanCoreState ctucan_state[CTUCAN_PCI_CORE_COUNT];
     qemu_irq        irq;

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

 static void ctucan_pci_reset(DeviceState *dev)
 {
     CtuCanPCIState *d = CTUCAN_PCI_DEV(dev);
     int i;

     for (i = 0 ; i < CTUCAN_PCI_CORE_COUNT; i++) {
         ctucan_hardware_reset(&d->ctucan_state[i]);
     }
 }

 static uint64_t ctucan_pci_id_cra_io_read(void *opaque, hwaddr addr,
                                           unsigned size)
 {
     if (addr >= 4) {
         return 0;
     }

     uint64_t tmp = 0xC0000000 + CTUCAN_PCI_CORE_COUNT;
     tmp >>= ((addr & 3) << 3);
     if (size < 8) {
         tmp &= ((uint64_t)1 << (size << 3)) - 1;
     }
     return tmp;
 }

 static void ctucan_pci_id_cra_io_write(void *opaque, hwaddr addr, uint64_t data,
                              unsigned size)
 {

 }

 static uint64_t ctucan_pci_cores_io_read(void *opaque, hwaddr addr,
                                           unsigned size)
 {
     CtuCanPCIState *d = opaque;
     CtuCanCoreState *s;
     hwaddr core_num = addr / CTUCAN_PCI_BYTES_PER_CORE;

     if (core_num >= CTUCAN_PCI_CORE_COUNT) {
         return 0;
     }

     s = &d->ctucan_state[core_num];

     return ctucan_mem_read(s, addr % CTUCAN_PCI_BYTES_PER_CORE, size);
 }

 static void ctucan_pci_cores_io_write(void *opaque, hwaddr addr, uint64_t data,
                              unsigned size)
 {
     CtuCanPCIState *d = opaque;
     CtuCanCoreState *s;
     hwaddr core_num = addr / CTUCAN_PCI_BYTES_PER_CORE;

     if (core_num >= CTUCAN_PCI_CORE_COUNT) {
         return;
     }

     s = &d->ctucan_state[core_num];

     return ctucan_mem_write(s, addr % CTUCAN_PCI_BYTES_PER_CORE, data, size);
 }

 static const MemoryRegionOps ctucan_pci_id_cra_io_ops = {
     .read = ctucan_pci_id_cra_io_read,
     .write = ctucan_pci_id_cra_io_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl.min_access_size = 1,
     .impl.max_access_size = 4,
     .valid.min_access_size = 1,
     .valid.max_access_size = 4,
 };

 static const MemoryRegionOps ctucan_pci_cores_io_ops = {
     .read = ctucan_pci_cores_io_read,
     .write = ctucan_pci_cores_io_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl.min_access_size = 1,
     .impl.max_access_size = 4,
     .valid.min_access_size = 1,
     .valid.max_access_size = 4,
 };

 static void ctucan_pci_realize(PCIDevice *pci_dev, Error **errp)
 {
     CtuCanPCIState *d = CTUCAN_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 < CTUCAN_PCI_CORE_COUNT; i++) {
         ctucan_init(&d->ctucan_state[i], d->irq);
     }

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

     memory_region_init_io(&d->ctucan_io[0], OBJECT(d),
                           &ctucan_pci_id_cra_io_ops, d,
                           "ctucan_pci-core0", CTUCAN_BAR0_RANGE);
     memory_region_init_io(&d->ctucan_io[1], OBJECT(d),
                           &ctucan_pci_cores_io_ops, d,
                           "ctucan_pci-core1", CTUCAN_PCI_CORE_RANGE);

     for (i = 0 ; i < CTUCAN_PCI_BAR_COUNT; i++) {
         pci_register_bar(&d->dev, i, PCI_BASE_ADDRESS_MEM_MASK & 0,
                          &d->ctucan_io[i]);
     }
 }

 static void ctucan_pci_exit(PCIDevice *pci_dev)
 {
     CtuCanPCIState *d = CTUCAN_PCI_DEV(pci_dev);
     int i;

     for (i = 0 ; i < CTUCAN_PCI_CORE_COUNT; i++) {
         ctucan_disconnect(&d->ctucan_state[i]);
     }

     qemu_free_irq(d->irq);
 }

 static const VMStateDescription vmstate_ctucan_pci = {
     .name = "ctucan_pci",
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (const VMStateField[]) {
         VMSTATE_PCI_DEVICE(dev, CtuCanPCIState),
         VMSTATE_STRUCT(ctucan_state[0], CtuCanPCIState, 0, vmstate_ctucan,
                        CtuCanCoreState),
 #if CTUCAN_PCI_CORE_COUNT >= 2
         VMSTATE_STRUCT(ctucan_state[1], CtuCanPCIState, 0, vmstate_ctucan,
                        CtuCanCoreState),
 #endif
         VMSTATE_END_OF_LIST()
     }
 };

 static void ctucan_pci_instance_init(Object *obj)
 {
     CtuCanPCIState *d = CTUCAN_PCI_DEV(obj);

     object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
                              (Object **)&d->canbus[0],
                              qdev_prop_allow_set_link_before_realize, 0);
 #if CTUCAN_PCI_CORE_COUNT >= 2
     object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
                              (Object **)&d->canbus[1],
                              qdev_prop_allow_set_link_before_realize, 0);
 #endif
 }

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

     k->realize = ctucan_pci_realize;
     k->exit = ctucan_pci_exit;
     k->vendor_id = PCI_VENDOR_ID_TEDIA;
     k->device_id = PCI_DEVICE_ID_TEDIA_CTUCAN_VER21;
     k->revision = 0x00;
     k->class_id = 0x000c09;
     k->subsystem_vendor_id = PCI_VENDOR_ID_TEDIA;
     k->subsystem_id = PCI_DEVICE_ID_TEDIA_CTUCAN_VER21;
     dc->desc = "CTU CAN PCI";
     dc->vmsd = &vmstate_ctucan_pci;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     device_class_set_legacy_reset(dc, ctucan_pci_reset);
 }

 static const TypeInfo ctucan_pci_info = {
     .name          = TYPE_CTUCAN_PCI_DEV,
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(CtuCanPCIState),
     .class_init    = ctucan_pci_class_init,
     .instance_init = ctucan_pci_instance_init,
     .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static void ctucan_pci_register_types(void)
 {
     type_register_static(&ctucan_pci_info);
 }

 type_init(ctucan_pci_register_types)
	/*
	* CTU CAN FD PCI device emulation
	* http://canbus.pages.fel.cvut.cz/
	*
	* Copyright (c) 2019 Jan Charvat (jancharvat.charvat@gmail.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/module.h"
	#include "qapi/error.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 "ctucan_core.h"

	#define TYPE_CTUCAN_PCI_DEV "ctucan_pci"

	typedef struct CtuCanPCIState CtuCanPCIState;
	DECLARE_INSTANCE_CHECKER(CtuCanPCIState, CTUCAN_PCI_DEV,
	TYPE_CTUCAN_PCI_DEV)

	#define CTUCAN_PCI_CORE_COUNT 2
	#define CTUCAN_PCI_CORE_RANGE 0x10000

	#define CTUCAN_PCI_BAR_COUNT 2

	#define CTUCAN_PCI_BYTES_PER_CORE 0x4000

	#ifndef PCI_VENDOR_ID_TEDIA
	#define PCI_VENDOR_ID_TEDIA 0x1760
	#endif

	#define PCI_DEVICE_ID_TEDIA_CTUCAN_VER21 0xff00

	#define CTUCAN_BAR0_RANGE 0x8000
	#define CTUCAN_BAR0_CTUCAN_ID 0x0000
	#define CTUCAN_BAR0_CRA_BASE 0x4000
	#define CYCLONE_IV_CRA_A2P_IE (0x0050)

	#define CTUCAN_WITHOUT_CTUCAN_ID 0
	#define CTUCAN_WITH_CTUCAN_ID 1

	struct CtuCanPCIState {
	/< private >/
	PCIDevice dev;
	/< public >/
	MemoryRegion ctucan_io[CTUCAN_PCI_BAR_COUNT];

	CtuCanCoreState ctucan_state[CTUCAN_PCI_CORE_COUNT];
	qemu_irq irq;

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

	static void ctucan_pci_reset(DeviceState *dev)
	{
	CtuCanPCIState *d = CTUCAN_PCI_DEV(dev);
	int i;

	for (i = 0 ; i < CTUCAN_PCI_CORE_COUNT; i++) {
	ctucan_hardware_reset(&d->ctucan_state[i]);
	}
	}

	static uint64_t ctucan_pci_id_cra_io_read(void *opaque, hwaddr addr,
	unsigned size)
	{
	if (addr >= 4) {
	return 0;
	}

	uint64_t tmp = 0xC0000000 + CTUCAN_PCI_CORE_COUNT;
	tmp >>= ((addr & 3) << 3);
	if (size < 8) {
	tmp &= ((uint64_t)1 << (size << 3)) - 1;
	}
	return tmp;
	}

	static void ctucan_pci_id_cra_io_write(void *opaque, hwaddr addr, uint64_t data,
	unsigned size)
	{

	}

	static uint64_t ctucan_pci_cores_io_read(void *opaque, hwaddr addr,
	unsigned size)
	{
	CtuCanPCIState *d = opaque;
	CtuCanCoreState *s;
	hwaddr core_num = addr / CTUCAN_PCI_BYTES_PER_CORE;

	if (core_num >= CTUCAN_PCI_CORE_COUNT) {
	return 0;
	}

	s = &d->ctucan_state[core_num];

	return ctucan_mem_read(s, addr % CTUCAN_PCI_BYTES_PER_CORE, size);
	}

	static void ctucan_pci_cores_io_write(void *opaque, hwaddr addr, uint64_t data,
	unsigned size)
	{
	CtuCanPCIState *d = opaque;
	CtuCanCoreState *s;
	hwaddr core_num = addr / CTUCAN_PCI_BYTES_PER_CORE;

	if (core_num >= CTUCAN_PCI_CORE_COUNT) {
	return;
	}

	s = &d->ctucan_state[core_num];

	return ctucan_mem_write(s, addr % CTUCAN_PCI_BYTES_PER_CORE, data, size);
	}

	static const MemoryRegionOps ctucan_pci_id_cra_io_ops = {
	.read = ctucan_pci_id_cra_io_read,
	.write = ctucan_pci_id_cra_io_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	.impl.min_access_size = 1,
	.impl.max_access_size = 4,
	.valid.min_access_size = 1,
	.valid.max_access_size = 4,
	};

	static const MemoryRegionOps ctucan_pci_cores_io_ops = {
	.read = ctucan_pci_cores_io_read,
	.write = ctucan_pci_cores_io_write,
	.endianness = DEVICE_LITTLE_ENDIAN,
	.impl.min_access_size = 1,
	.impl.max_access_size = 4,
	.valid.min_access_size = 1,
	.valid.max_access_size = 4,
	};

	static void ctucan_pci_realize(PCIDevice pci_dev, Error *errp)
	{
	CtuCanPCIState *d = CTUCAN_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 < CTUCAN_PCI_CORE_COUNT; i++) {
	ctucan_init(&d->ctucan_state[i], d->irq);
	}

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

	memory_region_init_io(&d->ctucan_io[0], OBJECT(d),
	&ctucan_pci_id_cra_io_ops, d,
	"ctucan_pci-core0", CTUCAN_BAR0_RANGE);
	memory_region_init_io(&d->ctucan_io[1], OBJECT(d),
	&ctucan_pci_cores_io_ops, d,
	"ctucan_pci-core1", CTUCAN_PCI_CORE_RANGE);

	for (i = 0 ; i < CTUCAN_PCI_BAR_COUNT; i++) {
	pci_register_bar(&d->dev, i, PCI_BASE_ADDRESS_MEM_MASK & 0,
	&d->ctucan_io[i]);
	}
	}

	static void ctucan_pci_exit(PCIDevice *pci_dev)
	{
	CtuCanPCIState *d = CTUCAN_PCI_DEV(pci_dev);
	int i;

	for (i = 0 ; i < CTUCAN_PCI_CORE_COUNT; i++) {
	ctucan_disconnect(&d->ctucan_state[i]);
	}

	qemu_free_irq(d->irq);
	}

	static const VMStateDescription vmstate_ctucan_pci = {
	.name = "ctucan_pci",
	.version_id = 1,
	.minimum_version_id = 1,
	.fields = (const VMStateField[]) {
	VMSTATE_PCI_DEVICE(dev, CtuCanPCIState),
	VMSTATE_STRUCT(ctucan_state[0], CtuCanPCIState, 0, vmstate_ctucan,
	CtuCanCoreState),
	#if CTUCAN_PCI_CORE_COUNT >= 2
	VMSTATE_STRUCT(ctucan_state[1], CtuCanPCIState, 0, vmstate_ctucan,
	CtuCanCoreState),
	#endif
	VMSTATE_END_OF_LIST()
	}
	};

	static void ctucan_pci_instance_init(Object *obj)
	{
	CtuCanPCIState *d = CTUCAN_PCI_DEV(obj);

	object_property_add_link(obj, "canbus0", TYPE_CAN_BUS,
	(Object **)&d->canbus[0],
	qdev_prop_allow_set_link_before_realize, 0);
	#if CTUCAN_PCI_CORE_COUNT >= 2
	object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
	(Object **)&d->canbus[1],
	qdev_prop_allow_set_link_before_realize, 0);
	#endif
	}

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

	k->realize = ctucan_pci_realize;
	k->exit = ctucan_pci_exit;
	k->vendor_id = PCI_VENDOR_ID_TEDIA;
	k->device_id = PCI_DEVICE_ID_TEDIA_CTUCAN_VER21;
	k->revision = 0x00;
	k->class_id = 0x000c09;
	k->subsystem_vendor_id = PCI_VENDOR_ID_TEDIA;
	k->subsystem_id = PCI_DEVICE_ID_TEDIA_CTUCAN_VER21;
	dc->desc = "CTU CAN PCI";
	dc->vmsd = &vmstate_ctucan_pci;
	set_bit(DEVICE_CATEGORY_MISC, dc->categories);
	device_class_set_legacy_reset(dc, ctucan_pci_reset);
	}

	static const TypeInfo ctucan_pci_info = {
	.name = TYPE_CTUCAN_PCI_DEV,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(CtuCanPCIState),
	.class_init = ctucan_pci_class_init,
	.instance_init = ctucan_pci_instance_init,
	.interfaces = (const InterfaceInfo[]) {
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static void ctucan_pci_register_types(void)
	{
	type_register_static(&ctucan_pci_info);
	}

	type_init(ctucan_pci_register_types)