sb/intel/common: Add a common interface to set final OPs settings

This adds a common place to set the final opprefix, optype and opmenu,
with a hook to override the opmenu.

Change-Id: I162ae6bad7da3ea02b96854ee28e70594e210947
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33036
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

2 files changed, 79 insertions, 0 deletions

diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c
index e9e66dcda3..8430dc8611 100644
--- a/src/southbridge/intel/common/spi.c
+++ b/src/southbridge/intel/common/spi.c
@@ -31,6 +31,8 @@
 
 #include <spi-generic.h>
 
+#include "spi.h"
+
 #define HSFC_FCYCLE_OFF		1	/* 1-2: FLASH Cycle */
 #define HSFC_FCYCLE		(0x3 << HSFC_FCYCLE_OFF)
 #define HSFC_FDBC_OFF		8	/* 8-13: Flash Data Byte Count */
@@ -1048,6 +1050,45 @@ static int spi_flash_protect(const struct spi_flash *flash,
 	return 0;
 }
 
+void spi_finalize_ops(void)
+{
+	struct ich_spi_controller *cntlr = &g_cntlr;
+	u16 spi_opprefix;
+	u16 optype = 0;
+	struct intel_swseq_spi_config spi_config = {
+		{0x06, 0x50},  /* OPPREFIXES: EWSR and WREN */
+		{ /* OPTYPE and OPCODE */
+			{0x01, WRITE_NO_ADDR},		/* WRSR: Write Status Register */
+			{0x02, WRITE_WITH_ADDR},	/* BYPR: Byte Program */
+			{0x03, READ_WITH_ADDR},		/* READ: Read Data */
+			{0x05, READ_NO_ADDR},		/* RDSR: Read Status Register */
+			{0x20, WRITE_WITH_ADDR},	/* SE20: Sector Erase 0x20 */
+			{0x9f, READ_NO_ADDR},		/* RDID: Read ID */
+			{0xd8, WRITE_WITH_ADDR},	/* BED8: Block Erase 0xd8 */
+			{0x0b, READ_WITH_ADDR},		/* FAST: Fast Read */
+		}
+	};
+	int i;
+
+	if (spi_locked())
+		return;
+
+	intel_southbridge_override_spi(&spi_config);
+
+	spi_opprefix = spi_config.opprefixes[0]
+		| (spi_config.opprefixes[1] << 8);
+	writew_(spi_opprefix, cntlr->preop);
+	for (i = 0; i < ARRAY_SIZE(spi_config.ops); i++) {
+		optype |= (spi_config.ops[i].type & 3) << (i * 2);
+		writeb_(spi_config.ops[i].op, &cntlr->opmenu[i]);
+	}
+	writew_(optype, &cntlr->optype);
+}
+
+__weak void intel_southbridge_override_spi(struct intel_swseq_spi_config *spi_config)
+{
+}
+
 static const struct spi_ctrlr spi_ctrlr = {
 	.xfer_vector = xfer_vectors,
 	.max_xfer_size = member_size(struct ich9_spi_regs, fdata),
diff --git a/src/southbridge/intel/common/spi.h b/src/southbridge/intel/common/spi.h
new file mode 100644
index 0000000000..3b8410cd9f
--- /dev/null
+++ b/src/southbridge/intel/common/spi.h
@@ -0,0 +1,38 @@
+/*
+ * This file is part of the coreboot project.
+
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef SOUTHBRIDGE_INTEL_SPI_H
+#define SOUTHBRIDGE_INTEL_SPI_H
+
+enum optype {
+	READ_NO_ADDR = 0,
+	WRITE_NO_ADDR = 1,
+	READ_WITH_ADDR = 2,
+	WRITE_WITH_ADDR = 3
+};
+
+struct intel_spi_op {
+	u8 op;
+	enum optype type;
+};
+
+struct intel_swseq_spi_config {
+	u8 opprefixes[2];
+	struct intel_spi_op ops[8];
+};
+
+void spi_finalize_ops(void);
+void intel_southbridge_override_spi(struct intel_swseq_spi_config *spi_config);
+
+#endif