diff options
| -rw-r--r-- | src/device/Kconfig | 5 | ||||
| -rw-r--r-- | src/device/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/device/xhci.c | 86 | ||||
| -rw-r--r-- | src/include/device/xhci.h | 57 |
4 files changed, 150 insertions, 0 deletions
diff --git a/src/device/Kconfig b/src/device/Kconfig index 79ce77d66e..f7f4b90c5e 100644 --- a/src/device/Kconfig +++ b/src/device/Kconfig @@ -811,4 +811,9 @@ config RESOURCE_ALLOCATOR_V4 ranges for allocating resources. This allows allocation of resources above 4G boundary as well. +config XHCI_UTILS + def_bool n + help + Provides xHCI utility functions. + endmenu diff --git a/src/device/Makefile.inc b/src/device/Makefile.inc index 2e62d4284d..2fae44ab24 100644 --- a/src/device/Makefile.inc +++ b/src/device/Makefile.inc @@ -62,3 +62,5 @@ ramstage-y += mmio.c ramstage-y += resource_allocator_common.c ramstage-$(CONFIG_RESOURCE_ALLOCATOR_V3) += resource_allocator_v3.c ramstage-$(CONFIG_RESOURCE_ALLOCATOR_V4) += resource_allocator_v4.c + +ramstage-$(CONFIG_XHCI_UTILS) += xhci.c diff --git a/src/device/xhci.c b/src/device/xhci.c new file mode 100644 index 0000000000..ce1c1b2124 --- /dev/null +++ b/src/device/xhci.c @@ -0,0 +1,86 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <device/xhci.h> +#include <console/console.h> +#include <device/pci_def.h> +#include <arch/mmio.h> + +union xhci_ext_caps_header { + uint32_t val; + struct { + uint32_t cap_id : 8; + uint32_t next_ptr : 8; + uint32_t reserved : 16; + }; +}; + +enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context, + void (*callback)(void *context, + const struct xhci_ext_cap *cap)) +{ + struct resource *res; + uint32_t *ext_cap_ptr; + uint32_t ext_caps_word_offset; + union xhci_ext_caps_header header; + struct xhci_ext_cap cap; + + if (!device || !callback) + return CB_ERR_ARG; + + res = probe_resource(device, PCI_BASE_ADDRESS_0); + if (!res) { + printk(BIOS_ERR, "%s: Unable to find BAR resource for %s\n", __func__, + dev_path(device)); + return CB_ERR; + } + + if (!(res->flags & IORESOURCE_ASSIGNED)) { + printk(BIOS_ERR, "%s: BAR is is not assigned\n", __func__); + return CB_ERR; + } + + if (res->limit > 0xFFFFFFFF) { + printk(BIOS_ERR, "%s: 64-bit BAR is not supported\n", __func__); + return CB_ERR; + } + + ext_caps_word_offset = read16(res2mmio(res, XHCI_HCCPARAMS1_XECP, 0)); + + if (!ext_caps_word_offset) { + printk(BIOS_ERR, "%s: No extended capabilities defined\n", __func__); + return CB_ERR; + } + + ext_cap_ptr = res2mmio(res, ext_caps_word_offset << 2, 0); + + while ((uintptr_t)ext_cap_ptr < (uintptr_t)res->limit) { + header.val = read32(ext_cap_ptr); + + cap.cap_id = header.cap_id; + + if (header.cap_id == XHCI_ECP_CAP_ID_SUPP) { + cap.supported_protocol.reg0 = header.val; + cap.supported_protocol.reg1 = read32(ext_cap_ptr + 1); + cap.supported_protocol.reg2 = read32(ext_cap_ptr + 2); + } + + callback(context, &cap); + + if (!header.next_ptr) + break; + + ext_cap_ptr += header.next_ptr; + } + + return CB_SUCCESS; +} + +void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol) +{ + printk(BIOS_DEBUG, "xHCI Supported Protocol:\n"); + printk(BIOS_DEBUG, " Major: %#x, Minor: %#x, Protocol: '%.*s'\n", + supported_protocol->major_rev, supported_protocol->minor_rev, + (int)sizeof(supported_protocol->name), supported_protocol->name); + printk(BIOS_DEBUG, " Port Offset: %d, Port Count: %d\n", + supported_protocol->port_offset, supported_protocol->port_count); +} 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__ */ |