drivers/wifi/generic: Move SMBIOS functions to a separate file

This change reorganizes the WiFi generic driver to move the SMBIOS
functions to a separate file. This change is done to reduce the noise
in generic.c file and improve readability of the file.

Change-Id: I38ed46f5ae1594945d2078b00e8315d9234f36d7
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46859
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/drivers/wifi/generic/Makefile.inc

@@ -1,5 +1,11 @@
-ramstage-$(CONFIG_DRIVERS_WIFI_GENERIC) += generic.c
+
+ifeq ($(CONFIG_DRIVERS_WIFI_GENERIC),y)
+
+ramstage-y += generic.c
+ramstage-$(CONFIG_GENERATE_SMBIOS_TABLES) += smbios.c
 
 cbfs-files-$(CONFIG_WIFI_SAR_CBFS)  += wifi_sar_defaults.hex
 wifi_sar_defaults.hex-file := $(call strip_quotes,$(CONFIG_WIFI_SAR_CBFS_FILEPATH))
 wifi_sar_defaults.hex-type := raw
+
+endif

src/drivers/wifi/generic/generic.c

@@ -9,10 +9,9 @@
 #include <device/pci_ids.h>
 #include <elog.h>
 #include <sar.h>
-#include <smbios.h>
-#include <string.h>
 #include <wrdd.h>
 #include "chip.h"
+#include "wifi_private.h"
 
 /* WRDS Spec Revision */
 #define WRDS_REVISION 0x0
@@ -243,42 +242,6 @@ static void wifi_pci_dev_init(struct device *dev)
 		elog_add_event_wake(ELOG_WAKE_SOURCE_PME_WIFI, 0);
 }
 
-#if CONFIG(GENERATE_SMBIOS_TABLES)
-static int smbios_write_intel_wifi(struct device *dev, int *handle, unsigned long *current)
-{
-	struct smbios_type_intel_wifi {
-		u8 type;
-		u8 length;
-		u16 handle;
-		u8 str;
-		u8 eos[2];
-	} __packed;
-
-	struct smbios_type_intel_wifi *t = (struct smbios_type_intel_wifi *)*current;
-	int len = sizeof(struct smbios_type_intel_wifi);
-
-	memset(t, 0, sizeof(struct smbios_type_intel_wifi));
-	t->type = 0x85;
-	t->length = len - 2;
-	t->handle = *handle;
-	/* Intel wifi driver expects this string to be in the table 0x85. */
-	t->str = smbios_add_string(t->eos, "KHOIHGIUCCHHII");
-
-	len = t->length + smbios_string_table_len(t->eos);
-	*current += len;
-	*handle += 1;
-	return len;
-}
-
-static int smbios_write_wifi(struct device *dev, int *handle, unsigned long *current)
-{
-	if (dev->vendor == PCI_VENDOR_ID_INTEL)
-		return smbios_write_intel_wifi(dev, handle, current);
-
-	return 0;
-}
-#endif
-
 struct device_operations wifi_generic_ops = {
 	.read_resources		= pci_dev_read_resources,
 	.set_resources		= pci_dev_set_resources,

src/drivers/wifi/generic/smbios.c

@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/device.h>
+#include <device/pci_ids.h>
+#include <smbios.h>
+#include <string.h>
+
+#include "wifi_private.h"
+
+static int smbios_write_intel_wifi(struct device *dev, int *handle, unsigned long *current)
+{
+	struct smbios_type_intel_wifi {
+		u8 type;
+		u8 length;
+		u16 handle;
+		u8 str;
+		u8 eos[2];
+	} __packed;
+
+	struct smbios_type_intel_wifi *t = (struct smbios_type_intel_wifi *)*current;
+	int len = sizeof(struct smbios_type_intel_wifi);
+
+	memset(t, 0, sizeof(struct smbios_type_intel_wifi));
+	t->type = 0x85;
+	t->length = len - 2;
+	t->handle = *handle;
+	/* Intel wifi driver expects this string to be in the table 0x85. */
+	t->str = smbios_add_string(t->eos, "KHOIHGIUCCHHII");
+
+	len = t->length + smbios_string_table_len(t->eos);
+	*current += len;
+	*handle += 1;
+	return len;
+}
+
+int smbios_write_wifi(struct device *dev, int *handle, unsigned long *current)
+{
+	if (dev->vendor == PCI_VENDOR_ID_INTEL)
+		return smbios_write_intel_wifi(dev, handle, current);
+
+	return 0;
+}

src/drivers/wifi/generic/wifi_private.h

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _WIFI_GENERIC_PRIVATE_H_
+#define _WIFI_GENERIC_PRIVATE_H_
+
+int smbios_write_wifi(struct device *dev, int *handle, unsigned long *current);
+
+#endif