mb/ocp/monolake: Add IPMI CMOS clear support

coreboot would clear CMOS by request via IPMI command, for example
BMC can issue "bios-util server --boot_order enable --clear_CMOS"
to set the request and reboot the system, then coreboot would clear CMOS
on the next boot.

Tested on Mono Lake

Change-Id: I21d44557896680cfac3c3b6d83e07b755b242cad
Signed-off-by: Johnny Lin <johnny_lin@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34857
Reviewed-by: Johnny Lin
Reviewed-by: Andrey Petrov <andrey.petrov@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/mainboard/ocp/monolake/ipmi.c b/src/mainboard/ocp/monolake/ipmi.c
new file mode 100644
index 0000000000..37aacc842e
--- /dev/null
+++ b/src/mainboard/ocp/monolake/ipmi.c
@@ -0,0 +1,80 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2019 Wiwynn Corp.
+ *
+ * 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 <stdint.h>
+#include <drivers/ipmi/ipmi_kcs.h>
+#include <console/console.h>
+#include "ipmi.h"
+
+#define BMC_KCS_BASE 0xca2
+
+int is_ipmi_clear_cmos_set(ipmi_oem_rsp_t *rsp)
+{
+	int ret;
+	ipmi_oem_req_t req;
+
+	if (rsp == NULL) {
+		printk(BIOS_ERR, "%s failed, null pointer parameter\n",
+			 __func__);
+		return 0;
+	}
+	/* IPMI OEM get bios boot order command to check if the valid bit and
+	   the CMOS clear bit are both set from the response BootMode byte. */
+	ret = ipmi_kcs_message(BMC_KCS_BASE, IPMI_NETFN_OEM, 0x0,
+			IPMI_OEM_GET_BIOS_BOOT_ORDER,
+			(const unsigned char *) &req, sizeof(ipmi_oem_req_t),
+			(unsigned char *) rsp, sizeof(ipmi_oem_rsp_t));
+
+	if (ret < sizeof(struct ipmi_rsp) || rsp->CompletionCode) {
+		printk(BIOS_ERR, "IPMI: %s command failed (ret=%d resp=0x%x)\n",
+		__func__, ret, rsp->CompletionCode);
+		return 0;
+	}
+
+	if (GET_VALID_BIT(rsp->Data.BootMode) && GET_CMOS_BIT(rsp->Data.BootMode)) {
+		printk(BIOS_INFO, "IPMI CMOS clear requested\n");
+		return 1;
+	}
+
+	printk(BIOS_DEBUG, "IPMI CMOS clear is not set\n");
+	return 0;
+}
+
+void clear_ipmi_flags(ipmi_oem_rsp_t *rsp_get)
+{
+	int ret;
+	ipmi_oem_req_t req;
+	struct ipmi_rsp rsp;
+
+	if (rsp_get == NULL) {
+		printk(BIOS_ERR, "%s failed, null pointer parameter\n",
+			__func__);
+		return;
+	}
+
+	req = rsp_get->Data;
+	CLEAR_CMOS_AND_VALID_BIT(req.BootMode);
+	ret = ipmi_kcs_message(BMC_KCS_BASE, IPMI_NETFN_OEM, 0x0,
+			IPMI_OEM_SET_BIOS_BOOT_ORDER,
+			(const unsigned char *) &req, sizeof(ipmi_oem_req_t),
+			(unsigned char *) &rsp, sizeof(rsp));
+
+	if (ret < sizeof(struct ipmi_rsp) || rsp.completion_code) {
+		printk(BIOS_ERR, "IPMI: %s command failed (ret=%d resp=0x%x)\n",
+			__func__, ret, rsp.completion_code);
+		return;
+	}
+
+	printk(BIOS_INFO, "clear IPMI flags done\n");
+}