| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #ifndef OPEN_ALLIANCE_HELPERS_H |
| #define OPEN_ALLIANCE_HELPERS_H |
| |
| /* |
| * These defines reflect the TDR (Time Delay Reflection) diagnostic feature |
| * for 1000BASE-T1 automotive Ethernet PHYs as specified by the OPEN Alliance. |
| * |
| * The register values are part of the HDD.TDR register, which provides |
| * information about the cable status and faults. The exact register offset |
| * is device-specific and should be provided by the driver. |
| */ |
| #define OA_1000BT1_HDD_TDR_ACTIVATION_MASK GENMASK(1, 0) |
| #define OA_1000BT1_HDD_TDR_ACTIVATION_OFF 1 |
| #define OA_1000BT1_HDD_TDR_ACTIVATION_ON 2 |
| |
| #define OA_1000BT1_HDD_TDR_STATUS_MASK GENMASK(7, 4) |
| #define OA_1000BT1_HDD_TDR_STATUS_SHORT 3 |
| #define OA_1000BT1_HDD_TDR_STATUS_OPEN 6 |
| #define OA_1000BT1_HDD_TDR_STATUS_NOISE 5 |
| #define OA_1000BT1_HDD_TDR_STATUS_CABLE_OK 7 |
| #define OA_1000BT1_HDD_TDR_STATUS_TEST_IN_PROGRESS 8 |
| #define OA_1000BT1_HDD_TDR_STATUS_TEST_NOT_POSSIBLE 13 |
| |
| /* |
| * OA_1000BT1_HDD_TDR_DISTANCE_MASK: |
| * This mask is used to extract the distance to the first/main fault |
| * detected by the TDR feature. Each bit represents an approximate distance |
| * of 1 meter, ranging from 0 to 31 meters. The exact interpretation of the |
| * bits may vary, but generally: |
| * 000000 = no error |
| * 000001 = error about 0-1m away |
| * 000010 = error between 1-2m away |
| * ... |
| * 011111 = error about 30-31m away |
| * 111111 = resolution not possible / out of distance |
| */ |
| #define OA_1000BT1_HDD_TDR_DISTANCE_MASK GENMASK(13, 8) |
| #define OA_1000BT1_HDD_TDR_DISTANCE_NO_ERROR 0 |
| #define OA_1000BT1_HDD_TDR_DISTANCE_RESOLUTION_NOT_POSSIBLE 0x3f |
| |
| int oa_1000bt1_get_ethtool_cable_result_code(u16 reg_value); |
| int oa_1000bt1_get_tdr_distance(u16 reg_value); |
| |
| #endif /* OPEN_ALLIANCE_HELPERS_H */ |
| |
