hw/net/can: PCM-3680I PCI (dual SJA1000 channel) emulation

Signed-off-by: NDeniz Eren <deniz.eren@icloud.com>
Signed-off-by: NPavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/net/can/Makefile.objs

 common-obj-$(CONFIG_CAN_SJA1000) += can_sja1000.o
 common-obj-$(CONFIG_CAN_PCI) += can_kvaser_pci.o
+common-obj-$(CONFIG_CAN_PCI) += can_pcm3680_pci.o

hw/net/can/can_pcm3680_pci.c

+/*
+ * 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/thread.h"
+#include "qemu/sockets.h"
+#include "qapi/error.h"
+#include "chardev/char.h"
+#include "hw/hw.h"
+#include "hw/pci/pci.h"
+#include "net/can_emu.h"
+
+#include "can_sja1000.h"
+
+#define TYPE_CAN_PCI_DEV "pcm3680_pci"
+
+#define PCM3680i_PCI_DEV(obj) \
+    OBJECT_CHECK(Pcm3680iPCIState, (obj), 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
+
+typedef 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];
+} Pcm3680iPCIState;
+
+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,
+    .minimum_version_id_old = 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, &error_abort);
+    object_property_add_link(obj, "canbus1", TYPE_CAN_BUS,
+                             (Object **)&d->canbus[1],
+                             qdev_prop_allow_set_link_before_realize,
+                             0, &error_abort);
+}
+
+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)