hw/acpi/piix4: use qdev gpio to wire up sci_irq

Introduce piix4_pm_init() instance init function and use it to
initialise the separate qdev gpio for the SCI IRQ.

The sci_irq can now be wired up directly using a qdev gpio instead
of having to set the IRQ externally in piix4_pm_initfn().

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220528091934.15520-9-mark.cave-ayland@ilande.co.uk>
[PMD: Partially squash 20220528091934.15520-8-mark.cave-ayland@ilande.co.uk]
Reviewed-by: Bernhard Beschow <shentey@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

4 files changed, 15 insertions, 10 deletions

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 418ec4e..fe5ec0a 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -497,9 +497,15 @@ static void piix4_pm_realize(PCIDevice *dev, Error **errp)
     piix4_pm_add_properties(s);
 }
 
+static void piix4_pm_init(Object *obj)
+{
+    PIIX4PMState *s = PIIX4_PM(obj);
+
+    qdev_init_gpio_out(DEVICE(obj), &s->irq, 1);
+}
+
 PIIX4PMState *piix4_pm_initfn(PCIBus *bus, int devfn, uint32_t smb_io_base,
-                              qemu_irq sci_irq, qemu_irq smi_irq,
-                              bool smm_enabled)
+                              qemu_irq smi_irq, bool smm_enabled)
 {
     PCIDevice *pci_dev;
     DeviceState *dev;
@@ -511,7 +517,6 @@ PIIX4PMState *piix4_pm_initfn(PCIBus *bus, int devfn, uint32_t smb_io_base,
     qdev_prop_set_bit(dev, "smm-enabled", smm_enabled);
 
     s = PIIX4_PM(dev);
-    s->irq = sci_irq;
     s->smi_irq = smi_irq;
 
     pci_realize_and_unref(pci_dev, bus, &error_fatal);
@@ -663,6 +668,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data)
 static const TypeInfo piix4_pm_info = {
     .name          = TYPE_PIIX4_PM,
     .parent        = TYPE_PCI_DEVICE,
+    .instance_init  = piix4_pm_init,
     .instance_size = sizeof(PIIX4PMState),
     .class_init    = piix4_pm_class_init,
     .interfaces = (InterfaceInfo[]) {
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index fde0fdc..27acba4 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -283,9 +283,9 @@ static void pc_init1(MachineState *machine,
         PIIX4PMState *piix4_pm;
 
         smi_irq = qemu_allocate_irq(pc_acpi_smi_interrupt, first_cpu, 0);
-        piix4_pm = piix4_pm_initfn(pci_bus, piix3_devfn + 3, 0xb100,
-                                   x86ms->gsi[9], smi_irq,
+        piix4_pm = piix4_pm_initfn(pci_bus, piix3_devfn + 3, 0xb100, smi_irq,
                                    x86_machine_is_smm_enabled(x86ms));
+        qdev_connect_gpio_out(DEVICE(piix4_pm), 0, x86ms->gsi[9]);
         pcms->smbus = I2C_BUS(qdev_get_child_bus(DEVICE(piix4_pm), "i2c"));
         /* TODO: Populate SPD eeprom data.  */
         smbus_eeprom_init(pcms->smbus, 8, NULL, 0);
diff --git a/hw/isa/piix4.c b/hw/isa/piix4.c
index 33a7015..0b6ea22 100644
--- a/hw/isa/piix4.c
+++ b/hw/isa/piix4.c
@@ -311,9 +311,9 @@ DeviceState *piix4_create(PCIBus *pci_bus, ISABus **isa_bus, I2CBus **smbus)
 
     pci_create_simple(pci_bus, devfn + 2, "piix4-usb-uhci");
     if (smbus) {
-        pms = piix4_pm_initfn(pci_bus, devfn + 3, 0x1100,
-                              qdev_get_gpio_in_named(dev, "isa", 9),
-                              NULL, 0);
+        pms = piix4_pm_initfn(pci_bus, devfn + 3, 0x1100, NULL, 0);
+        qdev_connect_gpio_out(DEVICE(pms), 0,
+                              qdev_get_gpio_in_named(dev, "isa", 9));
         *smbus = I2C_BUS(qdev_get_child_bus(DEVICE(pms), "i2c"));
     }
 
diff --git a/include/hw/southbridge/piix.h b/include/hw/southbridge/piix.h
index f75a4ad..105d158 100644
--- a/include/hw/southbridge/piix.h
+++ b/include/hw/southbridge/piix.h
@@ -17,8 +17,7 @@
 #include "hw/acpi/piix4.h"
 
 PIIX4PMState *piix4_pm_initfn(PCIBus *bus, int devfn, uint32_t smb_io_base,
-                              qemu_irq sci_irq, qemu_irq smi_irq,
-                              bool smm_enabled);
+                              qemu_irq smi_irq, bool smm_enabled);
 
 /* PIRQRC[A:D]: PIRQx Route Control Registers */
 #define PIIX_PIRQCA 0x60