[v4,10/30] hw/isa/piix3: Create USB controller in host device

Commit Message

Bernhard Beschow Dec. 21, 2022, 4:59 p.m. UTC

The USB controller is an integral part of PIIX3 (function 2). So create
it as part of the south bridge.

Note that the USB function is optional in QEMU. This is why it gets
object_initialize_child()'ed in realize rather than in instance_init.

Signed-off-by: Bernhard Beschow <[e-mail]>
Reviewed-by: Michael S. Tsirkin <[e-mail]>
Message-Id: <[e-mail]>
---
 hw/i386/pc_piix.c             |  7 ++-----
 hw/isa/Kconfig                |  1 +
 hw/isa/piix3.c                | 17 +++++++++++++++++
 include/hw/southbridge/piix.h |  4 ++++
 4 files changed, 24 insertions(+), 5 deletions(-)

Patch

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 5e6dba3558..18523e8a80 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -52,7 +52,6 @@ 
 #include "exec/memory.h"
 #include "hw/acpi/acpi.h"
 #include "hw/acpi/piix4.h"
-#include "hw/usb/hcd-uhci.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "sysemu/xen.h"
@@ -236,6 +235,8 @@  static void pc_init1(MachineState *machine,
         pcms->bus = pci_bus;
 
         pci_dev = pci_new_multifunction(-1, true, type);
+        object_property_set_bool(OBJECT(pci_dev), "has-usb",
+                                 machine_usb(machine), &error_abort);
         pci_realize_and_unref(pci_dev, pci_bus, &error_fatal);
         piix3 = PIIX3_PCI_DEVICE(pci_dev);
         piix3->pic = x86ms->gsi;
@@ -314,10 +315,6 @@  static void pc_init1(MachineState *machine,
     }
 #endif
 
-    if (pcmc->pci_enabled && machine_usb(machine)) {
-        pci_create_simple(pci_bus, piix3_devfn + 2, TYPE_PIIX3_USB_UHCI);
-    }
-
     if (pcmc->pci_enabled && x86_machine_is_acpi_enabled(X86_MACHINE(pcms))) {
         PCIDevice *piix4_pm;
 
diff --git a/hw/isa/Kconfig b/hw/isa/Kconfig
index af5ec9cd61..97b8ea7c06 100644
--- a/hw/isa/Kconfig
+++ b/hw/isa/Kconfig
@@ -36,6 +36,7 @@  config PIIX3
     select I8257
     select ISA_BUS
     select MC146818RTC
+    select USB_UHCI
 
 config PIIX4
     bool
diff --git a/hw/isa/piix3.c b/hw/isa/piix3.c
index e8ddb6a602..45c20dea17 100644
--- a/hw/isa/piix3.c
+++ b/hw/isa/piix3.c
@@ -288,6 +288,7 @@  static const MemoryRegionOps rcr_ops = {
 static void pci_piix3_realize(PCIDevice *dev, Error **errp)
 {
     PIIX3State *d = PIIX3_PCI_DEVICE(dev);
+    PCIBus *pci_bus = pci_get_bus(dev);
     ISABus *isa_bus;
 
     isa_bus = isa_bus_new(DEVICE(d), pci_address_space(dev),
@@ -308,6 +309,16 @@  static void pci_piix3_realize(PCIDevice *dev, Error **errp)
     if (!qdev_realize(DEVICE(&d->rtc), BUS(isa_bus), errp)) {
         return;
     }
+
+    /* USB */
+    if (d->has_usb) {
+        object_initialize_child(OBJECT(dev), "uhci", &d->uhci,
+                                TYPE_PIIX3_USB_UHCI);
+        qdev_prop_set_int32(DEVICE(&d->uhci), "addr", dev->devfn + 2);
+        if (!qdev_realize(DEVICE(&d->uhci), BUS(pci_bus), errp)) {
+            return;
+        }
+    }
 }
 
 static void build_pci_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
@@ -341,6 +352,11 @@  static void pci_piix3_init(Object *obj)
     object_initialize_child(obj, "rtc", &d->rtc, TYPE_MC146818_RTC);
 }
 
+static Property pci_piix3_props[] = {
+    DEFINE_PROP_BOOL("has-usb", PIIX3State, has_usb, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void pci_piix3_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -360,6 +376,7 @@  static void pci_piix3_class_init(ObjectClass *klass, void *data)
      * pc_piix.c's pc_init1()
      */
     dc->user_creatable = false;
+    device_class_set_props(dc, pci_piix3_props);
     adevc->build_dev_aml = build_pci_isa_aml;
 }
 
diff --git a/include/hw/southbridge/piix.h b/include/hw/southbridge/piix.h
index b1fa08dd2b..5367917182 100644
--- a/include/hw/southbridge/piix.h
+++ b/include/hw/southbridge/piix.h
@@ -15,6 +15,7 @@ 
 #include "hw/pci/pci.h"
 #include "qom/object.h"
 #include "hw/rtc/mc146818rtc.h"
+#include "hw/usb/hcd-uhci.h"
 
 /* PIRQRC[A:D]: PIRQx Route Control Registers */
 #define PIIX_PIRQCA 0x60
@@ -54,12 +55,15 @@  struct PIIXState {
     int32_t pci_irq_levels_vmstate[PIIX_NUM_PIRQS];
 
     RTCState rtc;
+    UHCIState uhci;
 
     /* Reset Control Register contents */
     uint8_t rcr;
 
     /* IO memory region for Reset Control Register (PIIX_RCR_IOPORT) */
     MemoryRegion rcr_mem;
+
+    bool has_usb;
 };
 typedef struct PIIXState PIIX3State;