[PATCH v4 4/7] usb: hcd-xhci-sysbus: Attach xhci to sysbus device

[Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>]

Use XHCI as sysbus device, add memory region property to get the
address space instance for dma read/write.

Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
---
 hw/usb/Kconfig           |  5 +++
 hw/usb/Makefile.objs     |  1 +
 hw/usb/hcd-xhci-sysbus.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++
 hw/usb/hcd-xhci-sysbus.h | 32 ++++++++++++++++
 hw/usb/hcd-xhci.h        |  1 +
 5 files changed, 138 insertions(+)
 create mode 100644 hw/usb/hcd-xhci-sysbus.c
 create mode 100644 hw/usb/hcd-xhci-sysbus.h

diff --git a/hw/usb/Kconfig b/hw/usb/Kconfig
index d9965c1..a251501 100644
--- a/hw/usb/Kconfig
+++ b/hw/usb/Kconfig
@@ -48,6 +48,11 @@ config USB_XHCI_NEC
     depends on PCI
     select USB_XHCI
 
+config USB_XHCI_SYSBUS
+    bool
+    default y if USB_XHCI
+    select USB
+
 config USB_MUSB
     bool
     select USB
diff --git a/hw/usb/Makefile.objs b/hw/usb/Makefile.objs
index 029b040..f16a3c3 100644
--- a/hw/usb/Makefile.objs
+++ b/hw/usb/Makefile.objs
@@ -12,6 +12,7 @@ common-obj-$(CONFIG_USB_EHCI_SYSBUS) += hcd-ehci-sysbus.o
 common-obj-$(CONFIG_USB_XHCI) += hcd-xhci.o
 common-obj-$(CONFIG_USB_XHCI_NEC) += hcd-xhci-nec.o
 common-obj-$(CONFIG_USB_XHCI_PCI) += hcd-xhci-pci.o
+common-obj-$(CONFIG_USB_XHCI_SYSBUS) += hcd-xhci-sysbus.o
 common-obj-$(CONFIG_USB_MUSB) += hcd-musb.o
 common-obj-$(CONFIG_USB_DWC2) += hcd-dwc2.o
 
diff --git a/hw/usb/hcd-xhci-sysbus.c b/hw/usb/hcd-xhci-sysbus.c
new file mode 100644
index 0000000..d5b4656
--- /dev/null
+++ b/hw/usb/hcd-xhci-sysbus.c
@@ -0,0 +1,99 @@
+/*
+ * USB xHCI controller for system-bus interface
+ * Based on hcd-echi-sysbus.c
+
+ * SPDX-FileCopyrightText: 2020 Xilinx
+ * SPDX-FileContributor: Author: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include "qemu/osdep.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "trace.h"
+#include "qapi/error.h"
+#include "hcd-xhci-sysbus.h"
+#include "hw/irq.h"
+
+static void xhci_sysbus_intr_raise(XHCIState *xhci, int n, bool level)
+{
+    XHCISysbusState *s = container_of(xhci, XHCISysbusState, xhci);
+
+    qemu_set_irq(s->irq[n], level);
+}
+
+void xhci_sysbus_reset(DeviceState *dev)
+{
+    XHCISysbusState *s = XHCI_SYSBUS(dev);
+
+    device_legacy_reset(DEVICE(&s->xhci));
+}
+
+static void xhci_sysbus_realize(DeviceState *dev, Error **errp)
+{
+    XHCISysbusState *s = XHCI_SYSBUS(dev);
+    Error *err = NULL;
+
+    object_property_set_link(OBJECT(&s->xhci), "host", OBJECT(s), NULL);
+    object_property_set_bool(OBJECT(&s->xhci), "realized", true, &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    s->irq = g_new0(qemu_irq, s->xhci.numintrs);
+    qdev_init_gpio_out_named(dev, s->irq, SYSBUS_DEVICE_GPIO_IRQ,
+                             s->xhci.numintrs);
+    if (s->xhci.dma_mr) {
+        s->xhci.as =  g_malloc0(sizeof(AddressSpace));
+        address_space_init(s->xhci.as, s->xhci.dma_mr, NULL);
+    } else {
+        s->xhci.as = &address_space_memory;
+    }
+
+    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->xhci.mem);
+}
+
+static void xhci_sysbus_instance_init(Object *obj)
+{
+    XHCISysbusState *s = XHCI_SYSBUS(obj);
+
+    object_initialize_child(obj, "xhci-core", &s->xhci, TYPE_XHCI);
+    qdev_alias_all_properties(DEVICE(&s->xhci), obj);
+
+    object_property_add_link(obj, "dma", TYPE_MEMORY_REGION,
+                             (Object **)&s->xhci.dma_mr,
+                             qdev_prop_allow_set_link_before_realize,
+                             OBJ_PROP_LINK_STRONG);
+    s->xhci.intr_update = NULL;
+    s->xhci.intr_raise = xhci_sysbus_intr_raise;
+}
+
+static Property xhci_sysbus_props[] = {
+    DEFINE_PROP_UINT32("intrs", XHCISysbusState, xhci.numintrs, MAXINTRS),
+    DEFINE_PROP_UINT32("slots", XHCISysbusState, xhci.numslots, MAXSLOTS),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void xhci_sysbus_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->reset = xhci_sysbus_reset;
+    dc->realize = xhci_sysbus_realize;
+    device_class_set_props(dc, xhci_sysbus_props);
+}
+
+static const TypeInfo xhci_sysbus_info = {
+    .name          = TYPE_XHCI_SYSBUS,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(XHCISysbusState),
+    .class_init    = xhci_sysbus_class_init,
+    .instance_init = xhci_sysbus_instance_init
+};
+
+static void xhci_sysbus_register_types(void)
+{
+    type_register_static(&xhci_sysbus_info);
+}
+
+type_init(xhci_sysbus_register_types);
diff --git a/hw/usb/hcd-xhci-sysbus.h b/hw/usb/hcd-xhci-sysbus.h
new file mode 100644
index 0000000..a308753
--- /dev/null
+++ b/hw/usb/hcd-xhci-sysbus.h
@@ -0,0 +1,32 @@
+/*
+ * USB xHCI controller for system-bus interface
+ *
+ * SPDX-FileCopyrightText: 2020 Xilinx
+ * SPDX-FileContributor: Author: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
+ * SPDX-sourceInfo: Based on hcd-echi-sysbus
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_USB_HCD_XHCI_SYSBUS_H
+#define HW_USB_HCD_XHCI_SYSBUS_H
+
+#include "hw/usb.h"
+#include "hcd-xhci.h"
+#include "hw/sysbus.h"
+
+#define TYPE_XHCI_SYSBUS "sysbus-xhci"
+#define XHCI_SYSBUS(obj) \
+    OBJECT_CHECK(XHCISysbusState, (obj), TYPE_XHCI_SYSBUS)
+
+
+typedef struct XHCISysbusState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+    XHCIState xhci;
+    qemu_irq *irq;
+} XHCISysbusState;
+
+void xhci_sysbus_reset(DeviceState *dev);
+#endif
diff --git a/hw/usb/hcd-xhci.h b/hw/usb/hcd-xhci.h
index fea1761..b951df4 100644
--- a/hw/usb/hcd-xhci.h
+++ b/hw/usb/hcd-xhci.h
@@ -190,6 +190,7 @@ typedef struct XHCIState {
 
     USBBus bus;
     MemoryRegion mem;
+    MemoryRegion *dma_mr;
     AddressSpace *as;
     MemoryRegion mem_cap;
     MemoryRegion mem_oper;
-- 
2.7.4