device/xhci: Add helper method to iterate over xhci_supported_protocl
There is some boilerplate required to iterate over the USB supported protocol structs. Encapsulate all the in a method to make the callers simpler. BUG=b:154756391 TEST=Built test trembyle. Signed-off-by: Raul E Rangel <rrangel@chromium.org> Change-Id: I401f10d242638b0000ba697573856d765333dca0 Reviewed-on: https://review.coreboot.org/c/coreboot/+/43352 Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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@ -1,9 +1,10 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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#include <device/xhci.h>
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#include <arch/mmio.h>
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#include <console/console.h>
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#include <device/pci_def.h>
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#include <arch/mmio.h>
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#include <device/xhci.h>
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#include <string.h>
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union xhci_ext_caps_header {
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uint32_t val;
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@ -75,6 +76,42 @@ enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context,
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return CB_SUCCESS;
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}
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struct supported_usb_cap_context {
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void *context;
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void (*callback)(void *context, const struct xhci_supported_protocol *data);
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};
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static void xhci_supported_usb_cap_handler(void *context, const struct xhci_ext_cap *cap)
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{
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const struct xhci_supported_protocol *data;
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struct supported_usb_cap_context *internal_context = context;
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if (cap->cap_id != XHCI_ECP_CAP_ID_SUPP)
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return;
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data = &cap->supported_protocol;
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if (memcmp(data->name, "USB ", 4)) {
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printk(BIOS_DEBUG, "%s: Unknown Protocol: %.*s\n", __func__,
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(int)sizeof(data->name), data->name);
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return;
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}
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internal_context->callback(internal_context->context, data);
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}
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enum cb_err xhci_for_each_supported_usb_cap(
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const struct device *device, void *context,
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void (*callback)(void *context, const struct xhci_supported_protocol *data))
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{
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struct supported_usb_cap_context internal_context = {
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.context = context,
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.callback = callback,
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};
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return xhci_for_each_ext_cap(device, &internal_context, xhci_supported_usb_cap_handler);
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}
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void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol)
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{
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printk(BIOS_DEBUG, "xHCI Supported Protocol:\n");
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@ -52,6 +52,14 @@ enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context,
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void (*callback)(void *context,
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const struct xhci_ext_cap *cap));
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/**
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* Helper method that iterates over only the USB supported capabilities structures in the
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* xHCI Extended Capabilities List.
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*/
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enum cb_err xhci_for_each_supported_usb_cap(
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const struct device *device, void *context,
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void (*callback)(void *context, const struct xhci_supported_protocol *data));
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void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol);
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#endif /* __DEVICE_XHCI_H__ */
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