soc/intel/common/block/fast_spi: Add SPI Vendor Component Lock

Add fast_spi_set_vcl() to be called by the SOC lockdown function if SPI
Vendor Specific Component Capabilities are desired.

Change-Id: I6d9b58e90fa16c539b90c6b961862e97e1bf29a2
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72478
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/soc/intel/common/block/fast_spi/fast_spi.c b/src/soc/intel/common/block/fast_spi/fast_spi.c
index 4fa10b0bb732..e8b2c3a7f23b 100644
--- a/src/soc/intel/common/block/fast_spi/fast_spi.c
+++ b/src/soc/intel/common/block/fast_spi/fast_spi.c
@@ -464,6 +464,17 @@ void fast_spi_set_bde(void)
 	pci_or_config32(dev, SPI_BIOS_DECODE_EN, SPI_BIOS_DECODE_LOCK);
 }
 
+/* Set FAST_SPIBAR + SPIBAR_SFDP0_VSCC0 (0xc4) Vendor Control Lock */
+void fast_spi_set_vcl(void)
+{
+	void *spibar = fast_spi_get_bar();
+	uint32_t vcss;
+
+	vcss = read32(spibar + SPIBAR_SFDP0_VSCC0);
+	vcss |= SPIBAR_SFDP0_VSCC0_VCL;
+	write32(spibar + SPIBAR_SFDP0_VSCC0, vcss);
+}
+
 void fast_spi_clear_outstanding_status(void)
 {
 	void *spibar = fast_spi_get_bar();