Raul E Rangel | a5b7ddf | 2020-05-29 17:16:20 -0600 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | |
| 3 | #ifndef __DEVICE_XHCI_H__ |
| 4 | #define __DEVICE_XHCI_H__ |
| 5 | |
| 6 | #include <stdint.h> |
| 7 | #include <device/device.h> |
| 8 | #include <commonlib/bsd/cb_err.h> |
| 9 | |
| 10 | #define XHCI_HCCPARAMS1_XECP 0x12 |
| 11 | |
| 12 | #define XHCI_ECP_CAP_ID_LEGACY 1 |
| 13 | #define XHCI_ECP_CAP_ID_SUPP 2 |
| 14 | |
| 15 | struct xhci_supported_protocol { |
| 16 | union { |
| 17 | uint32_t reg0; |
| 18 | struct { |
| 19 | uint32_t cap_id : 8; |
| 20 | uint32_t next_ptr : 8; |
| 21 | uint32_t minor_rev : 8; |
| 22 | uint32_t major_rev : 8; |
| 23 | }; |
| 24 | }; |
| 25 | union { |
| 26 | uint32_t reg1; |
| 27 | char name[4]; |
| 28 | }; |
| 29 | union { |
| 30 | uint32_t reg2; |
| 31 | struct { |
| 32 | uint32_t port_offset : 8; |
| 33 | uint32_t port_count : 8; |
| 34 | uint32_t reserved : 12; |
| 35 | uint32_t protocol_speed_id_count : 4; |
| 36 | }; |
| 37 | }; |
| 38 | }; |
| 39 | |
| 40 | struct xhci_ext_cap { |
| 41 | uint32_t cap_id; |
| 42 | /* cap_id is used to select the correct struct in the union. */ |
| 43 | union { |
| 44 | struct xhci_supported_protocol supported_protocol; |
| 45 | }; |
| 46 | }; |
| 47 | |
| 48 | /** |
| 49 | * Iterates over the xHCI Extended Capabilities List. |
| 50 | */ |
| 51 | enum cb_err xhci_for_each_ext_cap(const struct device *device, void *context, |
| 52 | void (*callback)(void *context, |
| 53 | const struct xhci_ext_cap *cap)); |
| 54 | |
Raul E Rangel | 2c952d6 | 2020-07-10 13:58:48 -0600 | [diff] [blame] | 55 | /** |
| 56 | * Helper method that iterates over only the USB supported capabilities structures in the |
| 57 | * xHCI Extended Capabilities List. |
| 58 | */ |
| 59 | enum cb_err xhci_for_each_supported_usb_cap( |
| 60 | const struct device *device, void *context, |
| 61 | void (*callback)(void *context, const struct xhci_supported_protocol *data)); |
| 62 | |
Raul E Rangel | a5b7ddf | 2020-05-29 17:16:20 -0600 | [diff] [blame] | 63 | void xhci_print_supported_protocol(const struct xhci_supported_protocol *supported_protocol); |
| 64 | |
| 65 | #endif /* __DEVICE_XHCI_H__ */ |