sb/intel/lynxpoint: Add native PCH init

Implement native PCH initialisation for Lynx Point. This is only needed
when MRC.bin is not used.

Change-Id: I36867bdc8b20000e44ff9d0d7b2c0d63952bd561
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64181
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 49 insertions, 0 deletions

diff --git a/src/southbridge/intel/lynxpoint/hsio/common.c b/src/southbridge/intel/lynxpoint/hsio/common.c
new file mode 100644
index 0000000000..111e6bd35c
--- /dev/null
+++ b/src/southbridge/intel/lynxpoint/hsio/common.c
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <device/pci_ops.h>
+#include <southbridge/intel/lynxpoint/hsio/hsio.h>
+#include <southbridge/intel/lynxpoint/pch.h>
+#include <types.h>
+
+/**
+ * FIXME: Ask Intel whether all lanes need to be programmed as specified
+ * in the PCH BWG. If not, make separate tables and only check this once.
+ */
+void hsio_sata_shared_update(const uint32_t addr, const uint32_t and, const uint32_t or)
+{
+	const uint8_t lane_owner = pci_read_config8(PCH_PCIE_DEV(0), 0x410);
+
+	if ((addr & 0xfe00) == 0x2000 && (lane_owner & (1 << 4)))
+		return;
+
+	if ((addr & 0xfe00) == 0x2200 && (lane_owner & (1 << 5)))
+		return;
+
+	if (CONFIG(INTEL_LYNXPOINT_LP)) {
+		if ((addr & 0xfe00) == 0x2400 && (lane_owner & (1 << 6)))
+			return;
+
+		if ((addr & 0xfe00) == 0x2600 && (lane_owner & (1 << 7)))
+			return;
+	}
+	hsio_update(addr, and, or);
+}
+
+void hsio_xhci_shared_update(const uint32_t addr, const uint32_t and, const uint32_t or)
+{
+	const uint8_t lane_owner = pci_read_config8(PCH_PCIE_DEV(0), 0x410);
+	if (CONFIG(INTEL_LYNXPOINT_LP)) {
+		if ((addr & 0xfe00) == 0x2400 && ((lane_owner >> 0) & 3) != 2)
+			return;
+
+		if ((addr & 0xfe00) == 0x2600 && ((lane_owner >> 2) & 3) != 2)
+			return;
+	} else {
+		if ((addr & 0xfe00) == 0x2c00 && ((lane_owner >> 2) & 3) != 2)
+			return;
+
+		if ((addr & 0xfe00) == 0x2e00 && ((lane_owner >> 0) & 3) != 2)
+			return;
+	}
+	hsio_update(addr, and, or);
+}