mb/google/auron: Factor out SPD indexing

The code to read the SPD file and index it is not variant-specific.

Change-Id: Iaee0a77934a45c65bf32dd0dba23cec654abc0b9
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49773
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

1 files changed, 26 insertions, 1 deletions

diff --git a/src/mainboard/google/auron/spd.c b/src/mainboard/google/auron/spd.c
index 751569e843..20d7498a7b 100644
--- a/src/mainboard/google/auron/spd.c
+++ b/src/mainboard/google/auron/spd.c
@@ -19,7 +19,7 @@
 #define SPD_PART_OFF		128
 #define SPD_PART_LEN		18
 
-void mainboard_print_spd_info(uint8_t spd[])
+static void mainboard_print_spd_info(uint8_t spd[])
 {
 	const int spd_banks[8] = {  8, 16, 32, 64, -1, -1, -1, -1 };
 	const int spd_capmb[8] = {  1,  2,  4,  8, 16, 32, 64,  0 };
@@ -68,3 +68,28 @@ void mainboard_print_spd_info(uint8_t spd[])
 		       capmb / 8 * busw / devw * ranks);
 	}
 }
+
+void fill_spd_for_index(uint8_t spd[], unsigned int spd_index)
+{
+	size_t spd_file_len;
+	uint8_t *spd_file = cbfs_map("spd.bin", &spd_file_len);
+
+	if (!spd_file)
+		die("SPD data not found.");
+
+	if (spd_file_len < SPD_LEN)
+		die("Missing SPD data.");
+
+	if (spd_file_len < ((spd_index + 1) * SPD_LEN)) {
+		printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n");
+		spd_index = 0;
+	}
+
+	memcpy(spd, spd_file + (spd_index * SPD_LEN), SPD_LEN);
+
+	/* Make sure a valid SPD was found */
+	if (spd[0] == 0)
+		die("Invalid SPD data.");
+
+	mainboard_print_spd_info(spd);
+}