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mainboard/intel/kblrvp: Add support to read board ID from EC 

Add a function to identify an Intel RVP board by querying EC

Change-Id: I21337000827639fb8f22c5ee9bc5d86f1ebe1e74
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/17283
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Naresh Solanki <naresh.solanki@intel.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Aamir Bohra 2016-11-08 14:06:17 +05:30 committed by Martin Roth
parent 673a2663a9
commit 6fed46805e
4 changed files with 73 additions and 0 deletions
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1
src/mainboard/intel/kblrvp/Kconfig
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@ -3,6 +3,7 @@ if BOARD_INTEL_KBLRVP3
config BOARD_SPECIFIC_OPTIONS # dummy
def_bool y
select BOARD_ROMSIZE_KB_16384
select EC_ACPI
select HAVE_ACPI_RESUME
select HAVE_ACPI_TABLES
select HAVE_OPTION_TABLE

4
src/mainboard/intel/kblrvp/Makefile.inc
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@ -20,7 +20,11 @@ bootblock-y += bootblock.c
bootblock-$(CONFIG_CHROMEOS) += chromeos.c
verstage-$(CONFIG_CHROMEOS) += chromeos.c
romstage-y += board_id.c
romstage-$(CONFIG_CHROMEOS) += chromeos.c
ramstage-y += board_id.c
ramstage-$(CONFIG_CHROMEOS) += chromeos.c
ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC) += ec.c

32
src/mainboard/intel/kblrvp/board_id.c Normal file
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@ -0,0 +1,32 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Intel Corporation.
*
* 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.
*/
#include "board_id.h"
#include <ec/acpi/ec.h>
#include <stdint.h>
/*
* Get Board ID via EC I/O port write/read
*/
int get_board_id(void)
{
uint8_t buffer[2];
uint8_t index;
if (send_ec_command(EC_FAB_ID_CMD) == 0) {
for (index = 0; index < sizeof(buffer); index++)
buffer[index] = recv_ec_data();
return (buffer[1] << 8) | buffer[0];
}
return -1;
}

36
src/mainboard/intel/kblrvp/board_id.h Normal file
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@ -0,0 +1,36 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Intel Corporation.
*
* 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 _MAINBOARD_BOARD_ID_H_
#define _MAINBOARD_BOARD_ID_H_
/* Mobile Board Id 0x00 - 0xFF */
#define BOARD_ID_SKL_A0_RVP3 0x04
#define BOARD_ID_SKL_RVP7 0x0B
/* 60-6F reserved for KBL RVPs */
#define BOARD_ID_KBL_LPDDR3_RVP3 0x60
#define BOARD_ID_KBL_LPDDR3_RVP7 0x64
/* Board/FAB ID Command */
#define EC_FAB_ID_CMD 0x0D
/*
* Returns board information (board id[15:8] and
* Fab info[7:0]) on success and < 0 on error
*/
int get_board_id(void);
#endif /* _MAINBOARD_BOARD_ID_H_ */