1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015-2016 Marvell International Ltd. 4 */ 5 6 #include <common.h> 7 #include <asm/io.h> 8 9 #include "comphy.h" 10 #include "comphy_hpipe.h" 11 12 /* 13 * comphy_mux_check_config() 14 * description: this function passes over the COMPHY lanes and check if the type 15 * is valid for specific lane. If the type is not valid, 16 * the function update the struct and set the type of the lane as 17 * PHY_TYPE_UNCONNECTED 18 */ 19 static void comphy_mux_check_config(struct comphy_mux_data *mux_data, 20 struct comphy_map *comphy_map_data, int comphy_max_lanes) 21 { 22 struct comphy_mux_options *mux_opt; 23 int lane, opt, valid; 24 25 debug_enter(); 26 27 for (lane = 0; lane < comphy_max_lanes; 28 lane++, comphy_map_data++, mux_data++) { 29 /* Don't check ignored COMPHYs */ 30 if (comphy_map_data->type == PHY_TYPE_IGNORE) 31 continue; 32 33 mux_opt = mux_data->mux_values; 34 for (opt = 0, valid = 0; opt < mux_data->max_lane_values; 35 opt++, mux_opt++) { 36 if (mux_opt->type == comphy_map_data->type) { 37 valid = 1; 38 break; 39 } 40 } 41 if (valid == 0) { 42 debug("lane number %d, had invalid type %d\n", 43 lane, comphy_map_data->type); 44 debug("set lane %d as type %d\n", lane, 45 PHY_TYPE_UNCONNECTED); 46 comphy_map_data->type = PHY_TYPE_UNCONNECTED; 47 } else { 48 debug("lane number %d, has type %d\n", 49 lane, comphy_map_data->type); 50 } 51 } 52 53 debug_exit(); 54 } 55 56 static u32 comphy_mux_get_mux_value(struct comphy_mux_data *mux_data, 57 u32 type, int lane) 58 { 59 struct comphy_mux_options *mux_opt; 60 int opt; 61 u32 value = 0; 62 63 debug_enter(); 64 65 mux_opt = mux_data->mux_values; 66 for (opt = 0 ; opt < mux_data->max_lane_values; opt++, mux_opt++) { 67 if (mux_opt->type == type) { 68 value = mux_opt->mux_value; 69 break; 70 } 71 } 72 73 debug_exit(); 74 75 return value; 76 } 77 78 static void comphy_mux_reg_write(struct comphy_mux_data *mux_data, 79 struct comphy_map *comphy_map_data, 80 int comphy_max_lanes, 81 void __iomem *selector_base, u32 bitcount) 82 { 83 u32 lane, value, offset, mask; 84 85 debug_enter(); 86 87 for (lane = 0; lane < comphy_max_lanes; 88 lane++, comphy_map_data++, mux_data++) { 89 if (comphy_map_data->type == PHY_TYPE_IGNORE) 90 continue; 91 92 offset = lane * bitcount; 93 mask = (((1 << bitcount) - 1) << offset); 94 value = (comphy_mux_get_mux_value(mux_data, 95 comphy_map_data->type, 96 lane) << offset); 97 reg_set(selector_base, value, mask); 98 } 99 100 debug_exit(); 101 } 102 103 void comphy_mux_init(struct chip_serdes_phy_config *chip_cfg, 104 struct comphy_map *comphy_map_data, 105 void __iomem *selector_base) 106 { 107 struct comphy_mux_data *mux_data; 108 u32 mux_bitcount; 109 u32 comphy_max_lanes; 110 111 debug_enter(); 112 113 comphy_max_lanes = chip_cfg->comphy_lanes_count; 114 mux_data = chip_cfg->mux_data; 115 mux_bitcount = chip_cfg->comphy_mux_bitcount; 116 117 /* check if the configuration is valid */ 118 comphy_mux_check_config(mux_data, comphy_map_data, comphy_max_lanes); 119 /* Init COMPHY selectors */ 120 comphy_mux_reg_write(mux_data, comphy_map_data, comphy_max_lanes, 121 selector_base, mux_bitcount); 122 123 debug_exit(); 124 } 125