1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef OPEN_ALLIANCE_HELPERS_H 4 #define OPEN_ALLIANCE_HELPERS_H 5 6 /* 7 * These defines reflect the TDR (Time Delay Reflection) diagnostic feature 8 * for 1000BASE-T1 automotive Ethernet PHYs as specified by the OPEN Alliance. 9 * 10 * The register values are part of the HDD.TDR register, which provides 11 * information about the cable status and faults. The exact register offset 12 * is device-specific and should be provided by the driver. 13 */ 14 #define OA_1000BT1_HDD_TDR_ACTIVATION_MASK GENMASK(1, 0) 15 #define OA_1000BT1_HDD_TDR_ACTIVATION_OFF 1 16 #define OA_1000BT1_HDD_TDR_ACTIVATION_ON 2 17 18 #define OA_1000BT1_HDD_TDR_STATUS_MASK GENMASK(7, 4) 19 #define OA_1000BT1_HDD_TDR_STATUS_SHORT 3 20 #define OA_1000BT1_HDD_TDR_STATUS_OPEN 6 21 #define OA_1000BT1_HDD_TDR_STATUS_NOISE 5 22 #define OA_1000BT1_HDD_TDR_STATUS_CABLE_OK 7 23 #define OA_1000BT1_HDD_TDR_STATUS_TEST_IN_PROGRESS 8 24 #define OA_1000BT1_HDD_TDR_STATUS_TEST_NOT_POSSIBLE 13 25 26 /* 27 * OA_1000BT1_HDD_TDR_DISTANCE_MASK: 28 * This mask is used to extract the distance to the first/main fault 29 * detected by the TDR feature. Each bit represents an approximate distance 30 * of 1 meter, ranging from 0 to 31 meters. The exact interpretation of the 31 * bits may vary, but generally: 32 * 000000 = no error 33 * 000001 = error about 0-1m away 34 * 000010 = error between 1-2m away 35 * ... 36 * 011111 = error about 30-31m away 37 * 111111 = resolution not possible / out of distance 38 */ 39 #define OA_1000BT1_HDD_TDR_DISTANCE_MASK GENMASK(13, 8) 40 #define OA_1000BT1_HDD_TDR_DISTANCE_NO_ERROR 0 41 #define OA_1000BT1_HDD_TDR_DISTANCE_RESOLUTION_NOT_POSSIBLE 0x3f 42 43 int oa_1000bt1_get_ethtool_cable_result_code(u16 reg_value); 44 int oa_1000bt1_get_tdr_distance(u16 reg_value); 45 46 #endif /* OPEN_ALLIANCE_HELPERS_H */ 47 48