Change in coreboot[master]: drivers/wifi/generic: Add support for CNVi dummy device ops

[Furquan Shaikh (Code Review)]

Furquan Shaikh has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/46862 )

Change subject: drivers/wifi/generic: Add support for CNVi dummy device ops
......................................................................

drivers/wifi/generic: Add support for CNVi dummy device ops

This change reorganizes drivers/wifi/generic to add a new
device_operations structure for dummy CNVi device. This is done to
make the organization of CNVi PCI device in devicetree consistent
with all the other internal PCI devices of the SoC i.e. without a chip
around the PCI device.

Thus, with this change, CNVi entry in devicetree can be changed from:
```
chip drivers/wifi/generic
    register "wake" = "xxyyzz"
    device pci xx.y on end # CNVi PCI device
end
```

to:

```
device pci xx.y on
    chip drivers/wifi/generic
    	register "wake" = "xxyyzz"
    	device generic 0 on end # Dummy CNVi device
    end
end # CNVi PCI device
```

The helper functions for ACPI/SMBIOS generation are also accordingly
updated to include _pcie_ and _cnvi_ in the function name.

Change-Id: Ib3cb9ed9b81ff8d6ac85a9aaf57b641caaa2f907
Signed-off-by: Furquan Shaikh 
---
M src/drivers/wifi/generic/acpi.c
M src/drivers/wifi/generic/generic.c
M src/drivers/wifi/generic/smbios.c
M src/drivers/wifi/generic/wifi_private.h
4 files changed, 45 insertions(+), 9 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/62/46862/1

diff --git a/src/drivers/wifi/generic/acpi.c b/src/drivers/wifi/generic/acpi.c
index 2afd99e..33862d9 100644
--- a/src/drivers/wifi/generic/acpi.c
+++ b/src/drivers/wifi/generic/acpi.c
@@ -218,7 +218,7 @@
           dev_path(dev));
 }

-void wifi_generic_fill_ssdt(const struct device *dev)
+void wifi_pcie_fill_ssdt(const struct device *dev)
 {
    const char *path;

@@ -233,7 +233,7 @@
    wifi_ssdt_write_properties(dev, path);
 }

-const char *wifi_generic_acpi_name(const struct device *dev)
+const char *wifi_pcie_acpi_name(const struct device *dev)
 {
    static char wifi_acpi_name[WIFI_ACPI_NAME_MAX_LEN];

@@ -242,3 +242,17 @@
    	 (dev_path_encode(dev) & 0xff));
    return wifi_acpi_name;
 }
+
+void wifi_cnvi_fill_ssdt(const struct device *dev)
+{
+	const char *path;
+
+	if (!dev->enabled)
+		return;
+
+	path = acpi_device_path(dev->bus->dev);
+	if (!path)
+		return;
+
+	wifi_ssdt_write_properties(dev, path);
+}
diff --git a/src/drivers/wifi/generic/generic.c b/src/drivers/wifi/generic/generic.c
index fcb7294..0b13fa8 100644
--- a/src/drivers/wifi/generic/generic.c
+++ b/src/drivers/wifi/generic/generic.c
@@ -15,21 +15,32 @@
    	elog_add_event_wake(ELOG_WAKE_SOURCE_PME_WIFI, 0);
 }

-struct device_operations wifi_generic_ops = {
+struct device_operations wifi_pcie_ops = {
    .read_resources		= pci_dev_read_resources,
    .set_resources		= pci_dev_set_resources,
    .enable_resources	= pci_dev_enable_resources,
    .init			= wifi_pci_dev_init,
    .ops_pci		= &pci_dev_ops_pci,
 #if CONFIG(HAVE_ACPI_TABLES)
-	.acpi_name		= wifi_generic_acpi_name,
-	.acpi_fill_ssdt		= wifi_generic_fill_ssdt,
+	.acpi_name		= wifi_pcie_acpi_name,
+	.acpi_fill_ssdt		= wifi_pcie_fill_ssdt,
 #endif
 #if CONFIG(GENERATE_SMBIOS_TABLES)
    .get_smbios_data	= smbios_write_wifi,
 #endif
 };

+struct device_operations wifi_cnvi_ops = {
+	.read_resources		= noop_read_resources,
+	.set_resources		= noop_set_resources,
+#if CONFIG(HAVE_ACPI_TABLES)
+	.acpi_fill_ssdt		= wifi_cnvi_fill_ssdt,
+#endif
+#if CONFIG(GENERATE_SMBIOS_TABLES)
+	.get_smbios_data	= smbios_write_cnvi,
+#endif
+};
+
 static void wifi_generic_enable(struct device *dev)
 {
    struct drivers_wifi_generic_config *config = dev ? dev->chip_info : NULL;
@@ -37,7 +48,10 @@
    if (!config)
    	return;

-	dev->ops = &wifi_generic_ops;
+	if (dev->path.type == DEVICE_PATH_PCI)
+		dev->ops = &wifi_pcie_ops;
+	else
+		dev->ops = &wifi_cnvi_ops;
 }

struct chip_operations drivers_wifi_generic_ops = {
@@ -104,7 +118,7 @@
  * `wifi_generic_ops`.
  */
 static const struct pci_driver intel_wifi_pci_driver __pci_driver = {
-	.ops		= &wifi_generic_ops,
+	.ops		= &wifi_pcie_ops,
    .vendor		= PCI_VENDOR_ID_INTEL,
    .devices	= intel_pci_device_ids,
 };
diff --git a/src/drivers/wifi/generic/smbios.c b/src/drivers/wifi/generic/smbios.c
index 0c1b976..770b297 100644
--- a/src/drivers/wifi/generic/smbios.c
+++ b/src/drivers/wifi/generic/smbios.c
@@ -40,3 +40,8 @@

return 0;
 }
+
+int smbios_write_cnvi(struct device *dev, int *handle, unsigned long *current)
+{
+	return smbios_write_wifi(dev->bus->dev, handle, current);
+}
diff --git a/src/drivers/wifi/generic/wifi_private.h b/src/drivers/wifi/generic/wifi_private.h
index 39cdfed..6360130 100644
--- a/src/drivers/wifi/generic/wifi_private.h
+++ b/src/drivers/wifi/generic/wifi_private.h
@@ -4,8 +4,11 @@
 #define _WIFI_GENERIC_PRIVATE_H_

int smbios_write_wifi(struct device *dev, int *handle, unsigned long *current);
+int smbios_write_cnvi(struct device *dev, int *handle, unsigned long *current);

-const char *wifi_generic_acpi_name(const struct device *dev);
-void wifi_generic_fill_ssdt(const struct device *dev);
+const char *wifi_pcie_acpi_name(const struct device *dev);
+void wifi_pcie_fill_ssdt(const struct device *dev);
+
+void wifi_cnvi_fill_ssdt(const struct device *dev);

#endif