Krzysztof Halasa | 921a86e | 2010-08-12 23:14:07 +0200 | [diff] [blame] | 1 | /* |
| 2 | * SBE 2T3E3 synchronous serial card driver for Linux |
| 3 | * |
| 4 | * Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of version 2 of the GNU General Public License |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This code is based on a driver written by SBE Inc. |
| 11 | */ |
| 12 | |
| 13 | #include "2t3e3.h" |
| 14 | #include "ctrl.h" |
| 15 | |
| 16 | void exar7300_init(struct channel *sc) |
| 17 | { |
| 18 | exar7300_write(sc, SBE_2T3E3_LIU_REG_REG1, 0); |
| 19 | |
| 20 | /* enable line decodeer and encoder */ |
| 21 | exar7300_write(sc, SBE_2T3E3_LIU_REG_REG2, 0); |
| 22 | exar7300_write(sc, SBE_2T3E3_LIU_REG_REG3, 0); |
| 23 | exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, |
| 24 | SBE_2T3E3_LIU_VAL_T3_MODE_SELECT | |
| 25 | SBE_2T3E3_LIU_VAL_LOOPBACK_OFF); |
| 26 | } |
| 27 | |
| 28 | void exar7300_set_loopback(struct channel *sc, u32 mode) |
| 29 | { |
| 30 | u32 val; |
| 31 | |
| 32 | switch (mode) { |
| 33 | case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF: |
| 34 | case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE: |
| 35 | case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG: |
| 36 | case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL: |
| 37 | break; |
| 38 | default: |
| 39 | return; |
| 40 | } |
| 41 | |
| 42 | val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4); |
| 43 | val &= ~(SBE_2T3E3_LIU_VAL_LOCAL_LOOPBACK | SBE_2T3E3_LIU_VAL_REMOTE_LOOPBACK); |
| 44 | val |= mode; |
| 45 | exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val); |
| 46 | |
| 47 | #if 0 |
| 48 | /* TODO - is it necessary? idea from 2T3E3_HW_Test_code */ |
| 49 | switch (mode) { |
| 50 | case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF: |
| 51 | break; |
| 52 | case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE: |
| 53 | exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON); |
| 54 | break; |
| 55 | case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG: |
| 56 | exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF); |
| 57 | break; |
| 58 | case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL: |
| 59 | exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON); |
| 60 | break; |
| 61 | } |
| 62 | #endif |
| 63 | } |
| 64 | |
| 65 | void exar7300_set_frame_type(struct channel *sc, u32 type) |
| 66 | { |
| 67 | u32 val; |
| 68 | |
| 69 | switch (type) { |
| 70 | case SBE_2T3E3_FRAME_TYPE_T3_CBIT: |
| 71 | case SBE_2T3E3_FRAME_TYPE_T3_M13: |
| 72 | case SBE_2T3E3_FRAME_TYPE_E3_G751: |
| 73 | case SBE_2T3E3_FRAME_TYPE_E3_G832: |
| 74 | break; |
| 75 | default: |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4); |
| 80 | val &= ~(SBE_2T3E3_LIU_VAL_T3_MODE_SELECT | |
| 81 | SBE_2T3E3_LIU_VAL_E3_MODE_SELECT); |
| 82 | |
| 83 | switch (type) { |
| 84 | case SBE_2T3E3_FRAME_TYPE_T3_CBIT: |
| 85 | case SBE_2T3E3_FRAME_TYPE_T3_M13: |
| 86 | val |= SBE_2T3E3_LIU_VAL_T3_MODE_SELECT; |
| 87 | break; |
| 88 | case SBE_2T3E3_FRAME_TYPE_E3_G751: |
| 89 | case SBE_2T3E3_FRAME_TYPE_E3_G832: |
| 90 | val |= SBE_2T3E3_LIU_VAL_E3_MODE_SELECT; |
| 91 | break; |
| 92 | default: |
| 93 | return; |
| 94 | } |
| 95 | |
| 96 | exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val); |
| 97 | } |
| 98 | |
| 99 | |
| 100 | void exar7300_transmit_all_ones_onoff(struct channel *sc, u32 mode) |
| 101 | { |
| 102 | if (sc->p.transmit_all_ones == mode) |
| 103 | return; |
| 104 | |
| 105 | switch (mode) { |
| 106 | case SBE_2T3E3_ON: |
| 107 | exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| 108 | SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES); |
| 109 | break; |
| 110 | case SBE_2T3E3_OFF: |
| 111 | exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| 112 | SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES); |
| 113 | break; |
| 114 | default: |
| 115 | return; |
| 116 | } |
| 117 | |
| 118 | sc->p.transmit_all_ones = mode; |
| 119 | } |
| 120 | |
| 121 | void exar7300_receive_equalization_onoff(struct channel *sc, u32 mode) |
| 122 | { |
| 123 | if (sc->p.receive_equalization == mode) |
| 124 | return; |
| 125 | |
| 126 | switch (mode) { |
| 127 | case SBE_2T3E3_OFF: |
| 128 | exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG2, |
| 129 | SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE); |
| 130 | break; |
| 131 | case SBE_2T3E3_ON: |
| 132 | exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG2, |
| 133 | SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE); |
| 134 | break; |
| 135 | default: |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | sc->p.receive_equalization = mode; |
| 140 | } |
| 141 | |
| 142 | void exar7300_line_build_out_onoff(struct channel *sc, u32 mode) |
| 143 | { |
| 144 | if (sc->p.line_build_out == mode) |
| 145 | return; |
| 146 | |
| 147 | switch (mode) { |
| 148 | case SBE_2T3E3_OFF: |
| 149 | exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| 150 | SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT); |
| 151 | exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF); |
| 152 | break; |
| 153 | case SBE_2T3E3_ON: |
| 154 | exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| 155 | SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT); |
| 156 | exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON); |
| 157 | break; |
| 158 | default: |
| 159 | return; |
| 160 | } |
| 161 | |
| 162 | sc->p.line_build_out = mode; |
| 163 | } |
| 164 | |
| 165 | /* TODO - what about encoder in raw mode??? disable it too? */ |
| 166 | void exar7300_unipolar_onoff(struct channel *sc, u32 mode) |
| 167 | { |
| 168 | switch (mode) { |
| 169 | case SBE_2T3E3_OFF: |
| 170 | exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG3, |
| 171 | SBE_2T3E3_LIU_VAL_DECODER_DISABLE); |
| 172 | exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| 173 | SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA); |
| 174 | break; |
| 175 | case SBE_2T3E3_ON: |
| 176 | exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG3, |
| 177 | SBE_2T3E3_LIU_VAL_DECODER_DISABLE); |
| 178 | exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| 179 | SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA); |
| 180 | break; |
| 181 | } |
| 182 | } |