drivers/ipmi: add code to set BMC/IPMI enablement from jumper
Some boards, like the Supermicro X11SSM-F, have a jumper for enabling or
disabling the BMC and IPMI. Add a new devicetree driver option to set
the GPIO used for the jumper and enable or disable IPMI according to its
value.
This gets used in a follow-up change by Supermicro X11SSM-F.
Test: Boot with jumper set to each enabled and disabled and check debug
log if IPMI gets enabled/disabled accordingly.
Successfully tested on Supermicro X11SSM-F with CB:48095.
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Tested-by: Michael Niewöhner <foss@mniewoehner.de>
Change-Id: Icde3232843a7138797a4b106560f170972edeb9c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48094
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/drivers/ipmi/chip.h b/src/drivers/ipmi/chip.h
index f561bcd..11bef9b 100644
--- a/src/drivers/ipmi/chip.h
+++ b/src/drivers/ipmi/chip.h
@@ -1,8 +1,12 @@
/* SPDX-License-Identifier: GPL-2.0-only */
+#include <device/device.h>
+
#ifndef _IMPI_CHIP_H_
#define _IPMI_CHIP_H_
+#include <stdint.h>
+
struct drivers_ipmi_config {
u8 bmc_i2c_address;
u8 have_nv_storage;
@@ -11,6 +15,13 @@
u8 gpe_interrupt;
u8 have_apic;
u32 apic_interrupt;
+ /* Device to use for GPIO operations */
+ DEVTREE_CONST struct device *gpio_dev;
+ /*
+ * Jumper GPIO for enabling / disabling BMC/IPMI
+ * If present, the jumper overrides the devicetree.
+ */
+ u32 bmc_jumper_gpio;
/*
* Wait for BMC to boot.
* This can be used if the BMC takes a long time to boot after PoR:
diff --git a/src/drivers/ipmi/ipmi_kcs_ops.c b/src/drivers/ipmi/ipmi_kcs_ops.c
index 38311ee..f261934 100644
--- a/src/drivers/ipmi/ipmi_kcs_ops.c
+++ b/src/drivers/ipmi/ipmi_kcs_ops.c
@@ -11,6 +11,7 @@
#include <arch/io.h>
#include <console/console.h>
#include <device/device.h>
+#include <device/gpio.h>
#include <device/pnp.h>
#if CONFIG(HAVE_ACPI_TABLES)
#include <acpi/acpi.h>
@@ -78,19 +79,32 @@
struct ipmi_devid_rsp rsp;
uint32_t man_id = 0, prod_id = 0;
struct drivers_ipmi_config *conf = dev->chip_info;
+ const struct gpio_operations *gpio_ops;
struct ipmi_selftest_rsp selftestrsp = {0};
uint8_t retry_count;
- if (!dev->enabled)
- return;
-
- printk(BIOS_DEBUG, "IPMI: PNP KCS 0x%x\n", dev->path.pnp.port);
-
if (!conf) {
printk(BIOS_WARNING, "IPMI: chip_info is missing! Skip init.\n");
return;
}
+ if (conf->bmc_jumper_gpio) {
+ gpio_ops = dev_get_gpio_ops(conf->gpio_dev);
+ if (!gpio_ops) {
+ printk(BIOS_WARNING, "IPMI: gpio device is missing gpio ops!\n");
+ } else {
+ /* Get jumper value and set device state accordingly */
+ dev->enabled = gpio_ops->get(conf->bmc_jumper_gpio);
+ if (!dev->enabled)
+ printk(BIOS_INFO, "IPMI: Disabled by jumper\n");
+ }
+ }
+
+ if (!dev->enabled)
+ return;
+
+ printk(BIOS_DEBUG, "IPMI: PNP KCS 0x%x\n", dev->path.pnp.port);
+
/* Get IPMI version for ACPI and SMBIOS */
if (conf->wait_for_bmc && conf->bmc_boot_timeout) {
struct stopwatch sw;