drivers/usb/acpi: Add a driver for generating USB ACPI
Add a support for generating USB port descriptors for ACPI based
on their definition by the board in devicetree.cb. This will
generate a _UPC and _PLD for each port, using a generic _PLD by
default. The _PLD can also be customized for more accurate
descriptions if necessary.
This sample devictree.cb shows a USB 2.0 type-A port behind a root
hub connected to an xHCI controller:
device pci 14.0 on
chip drivers/usb/acpi
register "desc" = ""Root Hub""
register "type" = "UPC_TYPE_HUB"
device usb 0.0 on
chip drivers/usb/acpi
register "desc" = ""USB 2.0 Type-A""
register "type" = "UPC_TYPE_A"
device usb 2.0 on end
end
end
end
end
It will generate the following ACPI code in the SSDT:
Scope (\_SB.PCI0.XHCI.RHUB.HS01)
{
Name (_DDN, "USB 2.0 Type-A")
Name (_UPC, Package (0x04)
{
0xFF,
0x00,
Zero,
Zero
})
Name (_PLD, ToPLD (
PLD_Revision = 0x2,
PLD_IgnoreColor = 0x1,
PLD_Red = 0x0,
PLD_Green = 0x0,
PLD_Blue = 0x0,
PLD_Width = 0x0,
PLD_Height = 0x0,
PLD_UserVisible = 0x1,
PLD_Dock = 0x0,
PLD_Lid = 0x0,
PLD_Panel = "UNKNOWN",
PLD_VerticalPosition = "CENTER",
PLD_HorizontalPosition = "CENTER",
PLD_Shape = "RECTANGLE",
PLD_GroupOrientation = 0x0,
PLD_GroupToken = 0x0,
PLD_GroupPosition = 0x0,
PLD_Bay = 0x0,
PLD_Ejectable = 0x0,
PLD_EjectRequired = 0x0,
PLD_CabinetNumber = 0x0,
PLD_CardCageNumber = 0x0,
PLD_Reference = 0x0,
PLD_Rotation = 0x0,
PLD_Order = 0x0,
PLD_VerticalOffset = 0x0,
PLD_HorizontalOffset = 0x0)
)
}
Change-Id: I7024390e407fda4b195211bd4755bb5ca53b2b37
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/26173
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/usb/acpi/usb_acpi.c b/src/drivers/usb/acpi/usb_acpi.c
new file mode 100644
index 0000000..65f1f82
--- /dev/null
+++ b/src/drivers/usb/acpi/usb_acpi.c
@@ -0,0 +1,75 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 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/acpi_pld.h>
+#include <arch/acpigen.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <stdint.h>
+#include <string.h>
+#include "chip.h"
+
+static void usb_acpi_fill_ssdt_generator(struct device *dev)
+{
+ struct drivers_usb_acpi_config *config = dev->chip_info;
+ const char *path = acpi_device_path(dev);
+
+ if (!dev->enabled || !path || !config)
+ return;
+
+ /* Don't generate output for hubs, only ports */
+ if (config->type == UPC_TYPE_HUB)
+ return;
+
+ acpigen_write_scope(path);
+ if (config->desc)
+ acpigen_write_name_string("_DDN", config->desc);
+ acpigen_write_upc(config->type);
+
+ if (config->use_custom_pld) {
+ /* Use board defined PLD */
+ acpigen_write_pld(&config->custom_pld);
+ } else {
+ /* Fill PLD strucutre based on port type */
+ struct acpi_pld pld;
+ acpi_pld_fill_usb(&pld, config->type);
+ acpigen_write_pld(&pld);
+ }
+
+ acpigen_pop_len();
+
+ printk(BIOS_INFO, "%s: %s at %s\n", path,
+ config->desc ? : dev->chip_ops->name, dev_path(dev));
+}
+
+static struct device_operations usb_acpi_ops = {
+ .read_resources = DEVICE_NOOP,
+ .set_resources = DEVICE_NOOP,
+ .enable_resources = DEVICE_NOOP,
+ .scan_bus = &scan_usb_bus,
+ .acpi_fill_ssdt_generator = &usb_acpi_fill_ssdt_generator,
+};
+
+static void usb_acpi_enable(struct device *dev)
+{
+ dev->ops = &usb_acpi_ops;
+}
+
+struct chip_operations drivers_usb_acpi_ops = {
+ CHIP_NAME("USB ACPI Device")
+ .enable_dev = &usb_acpi_enable
+};