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authorRaul E Rangel <rrangel@chromium.org>2020-05-29 17:16:20 -0600
committerPatrick Georgi <pgeorgi@google.com>2020-06-10 18:50:36 +0000
commita5b7ddf94047aed0444b0fd44c3498a639577d58 (patch)
treea6ca098da0a5b11c4f292f455dbf3f4e3782c7a9 /src/include
parent26a0c66c133aee35f559a62afb8d104915667c53 (diff)
downloadcoreboot-a5b7ddf94047aed0444b0fd44c3498a639577d58.tar.xz
device/xhci: Add xHCI utility to enumerate capabilities
This will allow enumerating an xHCI controller to allow dynamically generating the ACPI device nodes. BUG=b:154756391 TEST=Boot trembyle and see capabilities printed on console xHCI Supported Protocol: Major: 0x2, Minor: 0x0, Protocol: 'USB ' Port Offset: 1, Port Count: 2 xHCI Supported Protocol: Major: 0x3, Minor: 0x10, Protocol: 'USB ' Port Offset: 3, Port Count: 1 Signed-off-by: Raul E Rangel <rrangel@chromium.org> Change-Id: I3065c3fffad01b5378a55cfe904f971079b13d0f Reviewed-on: https://review.coreboot.org/c/coreboot/+/41899 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/include')
-rw-r--r--src/include/device/xhci.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/src/include/device/xhci.h b/src/include/device/xhci.h
new file mode 100644
index 0000000000..25f950be2e
--- /dev/null
+++ b/src/include/device/xhci.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __DEVICE_XHCI_H__
+#define __DEVICE_XHCI_H__
+
+#include <stdint.h>
+#include <device/device.h>
+#include <commonlib/bsd/cb_err.h>
+
+#define XHCI_HCCPARAMS1_XECP 0x12
+
+#define XHCI_ECP_CAP_ID_LEGACY 1
+#define XHCI_ECP_CAP_ID_SUPP 2
+
+struct xhci_supported_protocol {
+ union {
+ uint32_t reg0;
+ struct {
+ uint32_t cap_id : 8;
+ uint32_t next_ptr : 8;
+ uint32_t minor_rev : 8;
+ uint32_t major_rev : 8;
+ };
+ };
+ union {
+ uint32_t reg1;
+ char name[4];
+ };
+ union {
+ uint32_t reg2;
+ struct {
+ uint32_t port_offset : 8;
+ uint32_t port_count : 8;
+ uint32_t reserved : 12;
+ uint32_t protocol_speed_id_count : 4;
+ };
+ };
+};
+
+struct xhci_ext_cap {
+ uint32_t cap_id;
+ /* cap_id is used to select the correct struct in the union. */
+ union {
+ struct xhci_supported_protocol supported_protocol;
+ };
+};
+
+/**
+ * Iterates over the xHCI Extended Capabilities List.
+ */
+enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context,
+ void (*callback)(void *context,
+ const struct xhci_ext_cap *cap));
+
+void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol);
+
+#endif /* __DEVICE_XHCI_H__ */