SNB+MRC boards: Migrate MRC settings to devicetree

For Sandy Bridge boards with MRC raminit support, migrate as much
MRC settings to devicetree as possible, to stop mainboard code from
needlessly overwriting entire PEI data structure, so they will not
interfere with upcoming transition to one standard Haswell way of
providing SPD info to northbridge.

Some exceptions allowed are described below and in code comments.

SPD-related items are kept out of devicetree for now. They will be
migrated (with a different representation) with the Haswell SPD
transition.

google/{butterfly,link,parrot,stout} have max DDR3 frequency set in
pei_data to 1600 (2*800), but in devicetree to 666. The reason for the
difference seems to be problems with native raminit code. These are
converted into ternaries tied to CONFIG_USE_NATIVE_RAMINIT, with an
added "fix me" tag. asus/p8x7x-series also needs the same treatment,
based on testing various memory on p8z77-m hardware.

TEST=Builds on all affected boards. asus/p8z77-m still works with multiple RAM modules tested.

Change-Id: Ie349a8f400eecca3cdbc196ea0790aebe0549e39
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76962
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

2 files changed, 22 insertions, 41 deletions

diff --git a/src/mainboard/google/link/devicetree.cb b/src/mainboard/google/link/devicetree.cb
index c5a0a08455..88983dcfc6 100644
--- a/src/mainboard/google/link/devicetree.cb
+++ b/src/mainboard/google/link/devicetree.cb
@@ -17,7 +17,26 @@ chip northbridge/intel/sandybridge
 	register "gpu_cpu_backlight" = "0x00000200"
 	register "gpu_pch_backlight" = "0x04000000"
 
-	register "max_mem_clock_mhz" = "666"
+	register "ec_present" = "1"
+	register "ddr3lv_support" = "1"
+	# FIXME: Native raminit requires reduced max clock
+	register "max_mem_clock_mhz" = "CONFIG(USE_NATIVE_RAMINIT) ? 666 : 800"
+
+	register "usb_port_config" = "{
+		{ 0, 3, 0x0000 },
+		{ 1, 0, 0x0040 },
+		{ 1, 1, 0x0040 },
+		{ 1, 3, 0x0040 },
+		{ 0, 3, 0x0000 },
+		{ 1, 3, 0x0040 },
+		{ 0, 3, 0x0000 },
+		{ 0, 3, 0x0000 },
+		{ 1, 4, 0x0040 },
+		{ 1, 4, 0x0040 },
+		{ 0, 4, 0x0000 },
+		{ 0, 4, 0x0000 },
+		{ 0, 4, 0x0000 },
+		{ 0, 4, 0x0000 },}"
 
 	device domain 0 on
 		subsystemid 0x1ae0 0xc000 inherit
diff --git a/src/mainboard/google/link/early_init.c b/src/mainboard/google/link/early_init.c
index 17e8b54b96..a4127f14d8 100644
--- a/src/mainboard/google/link/early_init.c
+++ b/src/mainboard/google/link/early_init.c
@@ -83,46 +83,8 @@ static uint8_t *locate_spd(void)
 
 void mainboard_fill_pei_data(struct pei_data *pei_data)
 {
-	struct pei_data pei_data_template = {
-		.pei_version = PEI_VERSION,
-		.mchbar = CONFIG_FIXED_MCHBAR_MMIO_BASE,
-		.dmibar = CONFIG_FIXED_DMIBAR_MMIO_BASE,
-		.epbar = CONFIG_FIXED_EPBAR_MMIO_BASE,
-		.pciexbar = CONFIG_ECAM_MMCONF_BASE_ADDRESS,
-		.smbusbar = CONFIG_FIXED_SMBUS_IO_BASE,
-		.wdbbar = 0x4000000,
-		.wdbsize = 0x1000,
-		.hpet_address = HPET_BASE_ADDRESS,
-		.rcba = (uintptr_t)DEFAULT_RCBA,
-		.pmbase = DEFAULT_PMBASE,
-		.gpiobase = DEFAULT_GPIOBASE,
-		.thermalbase = 0xfed08000,
-		.system_type = 0, // 0 Mobile, 1 Desktop/Server
-		.tseg_size = CONFIG_SMM_TSEG_SIZE,
-		.ts_addresses = { 0x00, 0x00, 0x00, 0x00 },
-		.ec_present = 1,
-		.ddr3lv_support = 1,
-		.max_ddr3_freq = 1600,
-		.usb_port_config = {
-			/* Empty and onboard Ports 0-7, set to un-used pin OC3 */
-			{ 0, 3, 0x0000 }, /* P0: Empty */
-			{ 1, 0, 0x0040 }, /* P1: Left USB 1  (OC0) */
-			{ 1, 1, 0x0040 }, /* P2: Left USB 2  (OC1) */
-			{ 1, 3, 0x0040 }, /* P3: SDCARD      (no OC) */
-			{ 0, 3, 0x0000 }, /* P4: Empty */
-			{ 1, 3, 0x0040 }, /* P5: WWAN        (no OC) */
-			{ 0, 3, 0x0000 }, /* P6: Empty */
-			{ 0, 3, 0x0000 }, /* P7: Empty */
-			/* Empty and onboard Ports 8-13, set to un-used pin OC4 */
-			{ 1, 4, 0x0040 }, /* P8: Camera      (no OC) */
-			{ 1, 4, 0x0040 }, /* P9: Bluetooth   (no OC) */
-			{ 0, 4, 0x0000 }, /* P10: Empty */
-			{ 0, 4, 0x0000 }, /* P11: Empty */
-			{ 0, 4, 0x0000 }, /* P12: Empty */
-			{ 0, 4, 0x0000 }, /* P13: Empty */
-		},
-	};
-	*pei_data = pei_data_template;
+	/* TODO: Confirm if nortbridge_fill_pei_data() gets .system_type right (should be 0) */
+
 	/* LINK has 2 channels of memory down, so spd_data[0] and [2]
 	   both need to be populated */
 	memcpy(pei_data->spd_data[0], locate_spd(),