| /* |
| * SBE 2T3E3 synchronous serial card driver for Linux |
| * |
| * Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License |
| * as published by the Free Software Foundation. |
| * |
| * This code is based on a driver written by SBE Inc. |
| */ |
| |
| #include "2t3e3.h" |
| #include "ctrl.h" |
| |
| void exar7300_init(struct channel *sc) |
| { |
| exar7300_write(sc, SBE_2T3E3_LIU_REG_REG1, 0); |
| |
| /* enable line decodeer and encoder */ |
| exar7300_write(sc, SBE_2T3E3_LIU_REG_REG2, 0); |
| exar7300_write(sc, SBE_2T3E3_LIU_REG_REG3, 0); |
| exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, |
| SBE_2T3E3_LIU_VAL_T3_MODE_SELECT | |
| SBE_2T3E3_LIU_VAL_LOOPBACK_OFF); |
| } |
| |
| void exar7300_set_loopback(struct channel *sc, u32 mode) |
| { |
| u32 val; |
| |
| switch (mode) { |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF: |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE: |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG: |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL: |
| break; |
| default: |
| return; |
| } |
| |
| val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4); |
| val &= ~(SBE_2T3E3_LIU_VAL_LOCAL_LOOPBACK | SBE_2T3E3_LIU_VAL_REMOTE_LOOPBACK); |
| val |= mode; |
| exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val); |
| |
| #if 0 |
| /* TODO - is it necessary? idea from 2T3E3_HW_Test_code */ |
| switch (mode) { |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF: |
| break; |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE: |
| exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON); |
| break; |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG: |
| exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF); |
| break; |
| case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL: |
| exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON); |
| break; |
| } |
| #endif |
| } |
| |
| void exar7300_set_frame_type(struct channel *sc, u32 type) |
| { |
| u32 val; |
| |
| switch (type) { |
| case SBE_2T3E3_FRAME_TYPE_T3_CBIT: |
| case SBE_2T3E3_FRAME_TYPE_T3_M13: |
| case SBE_2T3E3_FRAME_TYPE_E3_G751: |
| case SBE_2T3E3_FRAME_TYPE_E3_G832: |
| break; |
| default: |
| return; |
| } |
| |
| val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4); |
| val &= ~(SBE_2T3E3_LIU_VAL_T3_MODE_SELECT | |
| SBE_2T3E3_LIU_VAL_E3_MODE_SELECT); |
| |
| switch (type) { |
| case SBE_2T3E3_FRAME_TYPE_T3_CBIT: |
| case SBE_2T3E3_FRAME_TYPE_T3_M13: |
| val |= SBE_2T3E3_LIU_VAL_T3_MODE_SELECT; |
| break; |
| case SBE_2T3E3_FRAME_TYPE_E3_G751: |
| case SBE_2T3E3_FRAME_TYPE_E3_G832: |
| val |= SBE_2T3E3_LIU_VAL_E3_MODE_SELECT; |
| break; |
| default: |
| return; |
| } |
| |
| exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val); |
| } |
| |
| |
| void exar7300_transmit_all_ones_onoff(struct channel *sc, u32 mode) |
| { |
| if (sc->p.transmit_all_ones == mode) |
| return; |
| |
| switch (mode) { |
| case SBE_2T3E3_ON: |
| exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES); |
| break; |
| case SBE_2T3E3_OFF: |
| exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES); |
| break; |
| default: |
| return; |
| } |
| |
| sc->p.transmit_all_ones = mode; |
| } |
| |
| void exar7300_receive_equalization_onoff(struct channel *sc, u32 mode) |
| { |
| if (sc->p.receive_equalization == mode) |
| return; |
| |
| switch (mode) { |
| case SBE_2T3E3_OFF: |
| exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG2, |
| SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE); |
| break; |
| case SBE_2T3E3_ON: |
| exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG2, |
| SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE); |
| break; |
| default: |
| return; |
| } |
| |
| sc->p.receive_equalization = mode; |
| } |
| |
| void exar7300_line_build_out_onoff(struct channel *sc, u32 mode) |
| { |
| if (sc->p.line_build_out == mode) |
| return; |
| |
| switch (mode) { |
| case SBE_2T3E3_OFF: |
| exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT); |
| exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF); |
| break; |
| case SBE_2T3E3_ON: |
| exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT); |
| exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON); |
| break; |
| default: |
| return; |
| } |
| |
| sc->p.line_build_out = mode; |
| } |
| |
| /* TODO - what about encoder in raw mode??? disable it too? */ |
| void exar7300_unipolar_onoff(struct channel *sc, u32 mode) |
| { |
| switch (mode) { |
| case SBE_2T3E3_OFF: |
| exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG3, |
| SBE_2T3E3_LIU_VAL_DECODER_DISABLE); |
| exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA); |
| break; |
| case SBE_2T3E3_ON: |
| exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG3, |
| SBE_2T3E3_LIU_VAL_DECODER_DISABLE); |
| exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1, |
| SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA); |
| break; |
| } |
| } |