summaryrefslogtreecommitdiff
path: root/src/drivers
diff options
context:
space:
mode:
authorJett Rink <jettrink@chromium.org>2019-03-01 10:20:34 -0700
committerPatrick Georgi <pgeorgi@google.com>2019-03-06 20:01:58 +0000
commit6bdfc8027bb68bcecd7c31069065c1e7c8ef3598 (patch)
tree8b03ef92925c83f4d5a7ecaadc094014046bbcf4 /src/drivers
parent4e8dee51e3f0a69f3a4171723fddbda5ecebe403 (diff)
downloadcoreboot-6bdfc8027bb68bcecd7c31069065c1e7c8ef3598.tar.xz
driver/intel/ish: add ish chip driver support
We want to be able to specify the firmware variant suffix in the devicetree.cb configuration for particular firmware builds. This driver allows us to specify the firmware_variant property in the device tree and have it populate a _DST table in the SSDT ACPI table for the ISH device, thus making the suffix available to the kernel (See crrev.com/c/1433482 for kernel change that uses the value) BUG=b:122722008 TEST=decompile DDST table and verify that new firmware-variant value is present. Also verfied that kernel can access this new field using the shim loader kernel CLs Change-Id: Id8be986185282521aee574027503eaf8968e1508 Signed-off-by: Jett Rink <jettrink@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31682 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/drivers')
-rw-r--r--src/drivers/intel/ish/Kconfig5
-rw-r--r--src/drivers/intel/ish/Makefile.inc1
-rw-r--r--src/drivers/intel/ish/chip.h22
-rw-r--r--src/drivers/intel/ish/ish.c81
4 files changed, 109 insertions, 0 deletions
diff --git a/src/drivers/intel/ish/Kconfig b/src/drivers/intel/ish/Kconfig
new file mode 100644
index 0000000000..635864e143
--- /dev/null
+++ b/src/drivers/intel/ish/Kconfig
@@ -0,0 +1,5 @@
+config DRIVERS_INTEL_ISH
+ bool
+ help
+ When enabled, chip driver/intel/ish will publish information to the
+ SSDT _DSD table for the ISH device.
diff --git a/src/drivers/intel/ish/Makefile.inc b/src/drivers/intel/ish/Makefile.inc
new file mode 100644
index 0000000000..cab2b1d804
--- /dev/null
+++ b/src/drivers/intel/ish/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_INTEL_ISH) += ish.c
diff --git a/src/drivers/intel/ish/chip.h b/src/drivers/intel/ish/chip.h
new file mode 100644
index 0000000000..ae3fb35b8d
--- /dev/null
+++ b/src/drivers/intel/ish/chip.h
@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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.
+ */
+
+/*
+ * Intel Integrated Sensor Hub (ISH)
+ */
+struct drivers_intel_ish_config {
+ /* Firmware name used by kernel for loading ISH firmware */
+ const char *firmware_name;
+};
diff --git a/src/drivers/intel/ish/ish.c b/src/drivers/intel/ish/ish.c
new file mode 100644
index 0000000000..bc1b6fa3c3
--- /dev/null
+++ b/src/drivers/intel/ish/ish.c
@@ -0,0 +1,81 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 Google LLC
+ *
+ * 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 <arch/acpi_device.h>
+#include <arch/acpigen.h>
+#include <console/console.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include "chip.h"
+
+static void ish_fill_ssdt_generator(struct device *dev)
+{
+ struct drivers_intel_ish_config *config = dev->chip_info;
+ struct device *root = dev->bus->dev;
+ struct acpi_dp *dsd;
+
+ if (!dev->enabled || !config || !config->firmware_name)
+ return;
+
+ acpigen_write_scope(acpi_device_path(root));
+
+ dsd = acpi_dp_new_table("_DSD");
+ acpi_dp_add_string(dsd, "firmware-name", config->firmware_name);
+ acpi_dp_write(dsd);
+
+ acpigen_pop_len(); /* Scope */
+
+ printk(BIOS_INFO, "%s: Set firmware-name: %s\n",
+ acpi_device_path(root), config->firmware_name);
+}
+
+static struct device_operations intel_ish_ops = {
+ .read_resources = DEVICE_NOOP,
+ .set_resources = DEVICE_NOOP,
+ .enable_resources = DEVICE_NOOP,
+ .acpi_fill_ssdt_generator = ish_fill_ssdt_generator,
+};
+
+static void intel_ish_enable(struct device *dev)
+{
+ /* This dev is a generic device that is a child to the ISH PCI device */
+ dev->ops = &intel_ish_ops;
+}
+
+/* Copy of default_pci_ops_dev with scan_bus addition */
+static const struct device_operations pci_ish_device_ops = {
+ .read_resources = pci_dev_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = pci_dev_init,
+ .scan_bus = &scan_generic_bus, /* Non-default */
+ .ops_pci = &pci_dev_ops_pci,
+};
+
+static const unsigned short pci_device_ids[] = {
+ PCI_DEVICE_ID_INTEL_CNL_ISHB,
+ 0
+};
+
+static const struct pci_driver ish_intel_driver __pci_driver = {
+ .ops = &pci_ish_device_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .devices = pci_device_ids,
+};
+
+struct chip_operations drivers_intel_ish_ops = {
+ CHIP_NAME("Intel ISH Chip")
+ .enable_dev = intel_ish_enable,
+};