[PATCH v2 33/35] acpi: tpm-tis: use AcpiDevAmlIfClass:build_dev_aml to provide device's AML

[Igor Mammedov <imammedo@redhat.com>]

.. and clean up not longer needed conditionals in DSTD build code
tpm-tis AML will be fetched and included when ISA bridge will
build its own AML code (including attached devices).

Expected AML change:
    the device under separate _SB.PCI0.ISA scope is moved directly
    under Device(ISA) node.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Ani Sinha <ani@anisinha.ca>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/i386/acpi-build.c | 34 ----------------------------------
 hw/tpm/tpm_tis_isa.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+), 34 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 1204b6da05..0b65fc99cd 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1804,40 +1804,6 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
             Aml *scope = aml_scope("PCI0");
             /* Scan all PCI buses. Generate tables to support hotplug. */
             build_append_pci_bus_devices(scope, bus, pm->pcihp_bridge_en);
-
-#ifdef CONFIG_TPM
-            if (TPM_IS_TIS_ISA(tpm)) {
-                dev = aml_device("ISA.TPM");
-                if (misc->tpm_version == TPM_VERSION_2_0) {
-                    aml_append(dev, aml_name_decl("_HID",
-                                                  aml_string("MSFT0101")));
-                    aml_append(dev,
-                               aml_name_decl("_STR",
-                                             aml_string("TPM 2.0 Device")));
-                } else {
-                    aml_append(dev, aml_name_decl("_HID",
-                                                  aml_eisaid("PNP0C31")));
-                }
-                aml_append(dev, aml_name_decl("_UID", aml_int(1)));
-
-                aml_append(dev, aml_name_decl("_STA", aml_int(0xF)));
-                crs = aml_resource_template();
-                aml_append(crs, aml_memory32_fixed(TPM_TIS_ADDR_BASE,
-                           TPM_TIS_ADDR_SIZE, AML_READ_WRITE));
-                /*
-                    FIXME: TPM_TIS_IRQ=5 conflicts with PNP0C0F irqs,
-                    Rewrite to take IRQ from TPM device model and
-                    fix default IRQ value there to use some unused IRQ
-                 */
-                /* aml_append(crs, aml_irq_no_flags(TPM_TIS_IRQ)); */
-                aml_append(dev, aml_name_decl("_CRS", crs));
-
-                tpm_build_ppi_acpi(tpm, dev);
-
-                aml_append(scope, dev);
-            }
-#endif
-
             aml_append(sb_scope, scope);
         }
     }
diff --git a/hw/tpm/tpm_tis_isa.c b/hw/tpm/tpm_tis_isa.c
index 3477afd735..91e3792248 100644
--- a/hw/tpm/tpm_tis_isa.c
+++ b/hw/tpm/tpm_tis_isa.c
@@ -30,6 +30,7 @@
 #include "tpm_prop.h"
 #include "tpm_tis.h"
 #include "qom/object.h"
+#include "hw/acpi/acpi_aml_interface.h"
 
 struct TPMStateISA {
     /*< private >*/
@@ -138,10 +139,39 @@ static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp)
     }
 }
 
+static void build_tpm_tis_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
+{
+    Aml *dev, *crs;
+    TPMStateISA *isadev = TPM_TIS_ISA(adev);
+    TPMIf *ti = TPM_IF(isadev);
+
+    dev = aml_device("TPM");
+    if (tpm_tis_isa_get_tpm_version(ti) == TPM_VERSION_2_0) {
+        aml_append(dev, aml_name_decl("_HID", aml_string("MSFT0101")));
+        aml_append(dev, aml_name_decl("_STR", aml_string("TPM 2.0 Device")));
+    } else {
+        aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C31")));
+    }
+    aml_append(dev, aml_name_decl("_UID", aml_int(1)));
+    aml_append(dev, aml_name_decl("_STA", aml_int(0xF)));
+    crs = aml_resource_template();
+    aml_append(crs, aml_memory32_fixed(TPM_TIS_ADDR_BASE, TPM_TIS_ADDR_SIZE,
+                                      AML_READ_WRITE));
+    /*
+     * FIXME: TPM_TIS_IRQ=5 conflicts with PNP0C0F irqs,
+     * fix default TPM_TIS_IRQ value there to use some unused IRQ
+     */
+    /* aml_append(crs, aml_irq_no_flags(isadev->state.irq_num)); */
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    tpm_build_ppi_acpi(ti, dev);
+    aml_append(scope, dev);
+}
+
 static void tpm_tis_isa_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     TPMIfClass *tc = TPM_IF_CLASS(klass);
+    AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
 
     device_class_set_props(dc, tpm_tis_isa_properties);
     dc->vmsd  = &vmstate_tpm_tis_isa;
@@ -151,6 +181,7 @@ static void tpm_tis_isa_class_init(ObjectClass *klass, void *data)
     tc->request_completed = tpm_tis_isa_request_completed;
     tc->get_version = tpm_tis_isa_get_tpm_version;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+    adevc->build_dev_aml = build_tpm_tis_isa_aml;
 }
 
 static const TypeInfo tpm_tis_isa_info = {
@@ -161,6 +192,7 @@ static const TypeInfo tpm_tis_isa_info = {
     .class_init  = tpm_tis_isa_class_init,
     .interfaces = (InterfaceInfo[]) {
         { TYPE_TPM_IF },
+        { TYPE_ACPI_DEV_AML_IF },
         { }
     }
 };
-- 
2.31.1