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soc/amd/stoneyridge: Support ACPI USB code generation

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To support generating USB devices in ACPI the platform needs to
know how to determine a device name for each USB port, and for any
root hubs that may be present.

The AMD Stoney Ridge platform has separate controllers for USB 2.0
and USB 3.0.  The USB 2.0 ports are connected through a hub to an
EHCI controller while the USB 3.0 ports are directly connected to
the xHCI controller.

This topology is described in ACPI and the port names are exposed
by the soc_acpi_name() function.

The USB controllers are configured to scan for static USB devices
in the devicetree and use the soc_acpi_name() function to identify
them.

Change-Id: I2bb677f84a49d2531929985dba319455b88e1686
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/26175
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Duncan Laurie
2018-05-07 15:37:28 -07:00
committed by Patrick Georgi
parent bf713b04b6
commit 32bdffaf54
4 changed files with 52 additions and 2 deletions
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34
src/soc/amd/stoneyridge/chip.c
View File

@@ -22,6 +22,7 @@
#include <device/pci.h>
#include <drivers/i2c/designware/dw_i2c.h>
#include <romstage_handoff.h>
#include <soc/acpi.h>
#include <soc/cpu.h>
#include <soc/northbridge.h>
#include <soc/pci_devs.h>
@@ -42,10 +43,41 @@ struct device_operations cpu_bus_ops = {
.acpi_fill_ssdt_generator = generate_cpu_entries,
};
static const char *soc_acpi_name(const struct device *dev)
const char *soc_acpi_name(const struct device *dev)
{
if (dev->path.type == DEVICE_PATH_DOMAIN)
return "PCI0";
if (dev->path.type == DEVICE_PATH_USB) {
switch (dev->path.usb.port_type) {
case 0:
/* Root Hub */
return "RHUB";
case 2:
/* USB2 ports */
switch (dev->path.usb.port_id) {
case 0: return "HS01";
case 1: return "HS02";
case 2: return "HS03";
case 3: return "HS04";
case 4: return "HS05";
case 5: return "HS06";
case 6: return "HS07";
case 7: return "HS08";
}
break;
case 3:
/* USB3 ports */
switch (dev->path.usb.port_id) {
case 0: return "SS01";
case 1: return "SS02";
case 2: return "SS03";
}
break;
}
return NULL;
}
if (dev->path.type != DEVICE_PATH_PCI)
return NULL;