1 files changed, 106 insertions, 0 deletions
diff --git a/src/drivers/ipmi/ipmi_ops.c b/src/drivers/ipmi/ipmi_ops.c
new file mode 100644
index 0000000000..784daeb1fb
--- /dev/null
+++ b/src/drivers/ipmi/ipmi_ops.c
@@ -0,0 +1,106 @@
+/*
+ * 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 <console/console.h>
+#include "ipmi_ops.h"
+
+enum cb_err ipmi_init_and_start_bmc_wdt(const int port, uint16_t countdown,
+				uint8_t action)
+{
+	int ret;
+	struct ipmi_wdt_req req = {0};
+	struct ipmi_rsp rsp;
+	printk(BIOS_INFO, "Initializing IPMI BMC watchdog timer\n");
+	/* BIOS FRB2 */
+	req.timer_use = 1;
+	req.timer_actions = action;
+	/* clear BIOS FRB2 expiration flag */
+	req.timer_use_expiration_flags_clr = 2;
+	req.initial_countdown_val = countdown;
+	ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
+			IPMI_BMC_SET_WDG_TIMER,
+			(const unsigned char *) &req, sizeof(req),
+			(unsigned char *) &rsp, sizeof(rsp));
+
+	if (ret < sizeof(struct ipmi_rsp) || rsp.completion_code) {
+		printk(BIOS_ERR, "IPMI: %s set wdt command failed "
+			"(ret=%d resp=0x%x), failed to initialize and start "
+			"IPMI BMC watchdog timer\n", __func__,
+			ret, rsp.completion_code);
+		return CB_ERR;
+	}
+
+	/* Reset command to start timer */
+	ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
+			IPMI_BMC_RESET_WDG_TIMER, NULL, 0,
+			(unsigned char *) &rsp, sizeof(rsp));
+
+	if (ret < sizeof(struct ipmi_rsp) || rsp.completion_code) {
+		printk(BIOS_ERR, "IPMI: %s reset wdt command failed "
+			"(ret=%d resp=0x%x), failed to initialize and start "
+			"IPMI BMC watchdog timer\n", __func__,
+			ret, rsp.completion_code);
+		return CB_ERR;
+	}
+
+	printk(BIOS_INFO, "IPMI BMC watchdog initialized and started.\n");
+	return CB_SUCCESS;
+}
+
+enum cb_err ipmi_stop_bmc_wdt(const int port)
+{
+	int ret;
+	struct ipmi_wdt_req req;
+	struct ipmi_wdt_rsp rsp = {0};
+	struct ipmi_rsp resp;
+
+	/* Get current timer first */
+	ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
+			IPMI_BMC_GET_WDG_TIMER, NULL, 0,
+			(unsigned char *) &rsp, sizeof(rsp));
+
+	if (ret < sizeof(struct ipmi_rsp) || rsp.resp.completion_code) {
+		printk(BIOS_ERR, "IPMI: %s get wdt command failed "
+			"(ret=%d resp=0x%x), IPMI BMC watchdog timer may still "
+			"be running\n", __func__, ret,
+			 rsp.resp.completion_code);
+		return CB_ERR;
+	}
+	/* If bit 6 in timer_use is 0 then it's already stopped. */
+	if (!(rsp.data.timer_use & (1 << 6))) {
+		printk(BIOS_DEBUG, "IPMI BMC watchdog is already stopped\n");
+		return CB_SUCCESS;
+	}
+	/* Set timer stop running by clearing bit 6. */
+	rsp.data.timer_use &= ~(1 << 6);
+	rsp.data.initial_countdown_val = 0;
+	req = rsp.data;
+	ret = ipmi_kcs_message(port, IPMI_NETFN_APPLICATION, 0x0,
+			IPMI_BMC_SET_WDG_TIMER,
+			(const unsigned char *) &req, sizeof(req),
+			(unsigned char *) &resp, sizeof(resp));
+
+	if (ret < sizeof(struct ipmi_rsp) || resp.completion_code) {
+		printk(BIOS_ERR, "IPMI: %s set wdt command stop timer failed "
+			"(ret=%d resp=0x%x), failed to stop IPMI "
+			"BMC watchdog timer\n", __func__, ret,
+			resp.completion_code);
+		return CB_ERR;
+	}
+	printk(BIOS_DEBUG, "IPMI BMC watchdog is stopped\n");
+
+	return CB_SUCCESS;
+}