mb/purism/librem_whl: Add new board Librem Mini (WHL-U)

Add new librem_whl baseboard and Librem Mini variant.

Tested with SeaBIOS, Tianocore, and Heads payloads.

All functions working normally except SATA, which is limited
via a FSP UPD to 3Gbps until the correct HSIO PHY settings
can be determined.

https://puri.sm/products/librem-mini/

Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
Change-Id: I36af42766f85eb17f86f6ec9b48b87125fb911e6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40278
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/src/mainboard/purism/librem_whl/romstage.c b/src/mainboard/purism/librem_whl/romstage.c
new file mode 100644
index 0000000000..9f8d600950
--- /dev/null
+++ b/src/mainboard/purism/librem_whl/romstage.c
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <soc/cnl_memcfg_init.h>
+#include <soc/romstage.h>
+
+static const struct cnl_mb_cfg memcfg = {
+
+	/* Parameters required to access SPD for CH0D0/CH0D1/CH1D0/CH1D1. */
+	.spd[0] = {
+		.read_type = READ_SMBUS,
+		.spd_spec = {.spd_smbus_address = 0xa0},
+	},
+	.spd[1] = {.read_type = NOT_EXISTING},
+	.spd[2] = {
+		.read_type = READ_SMBUS,
+		.spd_spec = {.spd_smbus_address = 0xa4},
+	},
+	.spd[3] = {.read_type = NOT_EXISTING},
+
+	/*
+	 * Rcomp resistor values.  These values represent the resistance in
+	 * ohms of the three rcomp resistors attached to the DDR_COMP_0,
+	 * DDR_COMP_1, and DDR_COMP_2 pins on the DRAM.
+	 */
+	.rcomp_resistor = { 121, 81, 100 },
+
+	/* Rcomp target values */
+	.rcomp_targets = { 100, 40, 20, 20, 26 },
+
+	/*
+	 * Indicates whether memory is interleaved.
+	 * Set to 1 for an interleaved design,
+	 * set to 0 for non-interleaved design.
+	 */
+	.dq_pins_interleaved = 1,
+
+	/*
+	 * VREF_CA configuration.
+	 * Set to 0 VREF_CA goes to both CH_A and CH_B,
+	 * set to 1 VREF_CA goes to CH_A and VREF_DQ_A goes to CH_B,
+	 * set to 2 VREF_CA goes to CH_A and VREF_DQ_B goes to CH_B.
+	 */
+	.vref_ca_config = 2,
+
+	/* Early Command Training */
+	.ect = 0,
+};
+
+void mainboard_memory_init_params(FSPM_UPD *memupd)
+{
+	cannonlake_memcfg_init(&memupd->FspmConfig, &memcfg);
+}