soc/amd/stoneyridge: factor out AGESA-wrapper related FCH functions

Split the code that gets called from the AGESA wrapper from the rest of
the FCH/southbridge code that directly interacts with the hardware.
Since the remaining parts of southbridge.c aren't used in romstage,
drop it from the list of build targets for romstage.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6197add0e1396a82545735653110e1e17bf9c303
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60141
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/src/soc/amd/stoneyridge/fch_agesa.c b/src/soc/amd/stoneyridge/fch_agesa.c
new file mode 100644
index 0000000000..ee6ab91c6d
--- /dev/null
+++ b/src/soc/amd/stoneyridge/fch_agesa.c
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/agesawrapper.h>
+#include <device/device.h>
+#include <soc/pci_devs.h>
+
+static int is_sata_config(void)
+{
+	return !((SataNativeIde == CONFIG_STONEYRIDGE_SATA_MODE)
+			|| (SataLegacyIde == CONFIG_STONEYRIDGE_SATA_MODE));
+}
+
+static inline int sb_sata_enable(void)
+{
+	/* True if IDE or AHCI. */
+	return (SataNativeIde == CONFIG_STONEYRIDGE_SATA_MODE) ||
+		(SataAhci == CONFIG_STONEYRIDGE_SATA_MODE);
+}
+
+static inline int sb_ide_enable(void)
+{
+	/* True if IDE or LEGACY IDE. */
+	return (SataNativeIde == CONFIG_STONEYRIDGE_SATA_MODE) ||
+		(SataLegacyIde == CONFIG_STONEYRIDGE_SATA_MODE);
+}
+
+void SetFchResetParams(FCH_RESET_INTERFACE *params)
+{
+	const struct device *dev = pcidev_path_on_root(SATA_DEVFN);
+	params->Xhci0Enable = CONFIG(STONEYRIDGE_XHCI_ENABLE);
+	if (dev && dev->enabled) {
+		params->SataEnable = sb_sata_enable();
+		params->IdeEnable = sb_ide_enable();
+	} else {
+		params->SataEnable = FALSE;
+		params->IdeEnable = FALSE;
+	}
+}
+
+void SetFchEnvParams(FCH_INTERFACE *params)
+{
+	const struct device *dev = pcidev_path_on_root(SATA_DEVFN);
+	params->AzaliaController = AzEnable;
+	params->SataClass = CONFIG_STONEYRIDGE_SATA_MODE;
+	if (dev && dev->enabled) {
+		params->SataEnable = is_sata_config();
+		params->IdeEnable = !params->SataEnable;
+		params->SataIdeMode = (CONFIG_STONEYRIDGE_SATA_MODE ==
+					SataLegacyIde);
+	} else {
+		params->SataEnable = FALSE;
+		params->IdeEnable = FALSE;
+		params->SataIdeMode = FALSE;
+	}
+}
+
+void SetFchMidParams(FCH_INTERFACE *params)
+{
+	SetFchEnvParams(params);
+}