921a86e0e3
This is a driver for SBE Inc.'s dual port T3/E3 WAN cards. Based on their original GPLed driver. The original driver tarball is now accessible at http://userweb.kernel.org/~chris/SBE_2T3_Linux_2.0c.tgz It needs at least a new generic HDLC setup code (not yet written) before moving to drivers/net/wan. Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
183 lines
4.4 KiB
C
183 lines
4.4 KiB
C
/*
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* SBE 2T3E3 synchronous serial card driver for Linux
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*
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* Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License
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* as published by the Free Software Foundation.
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*
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* This code is based on a driver written by SBE Inc.
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*/
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#include "2t3e3.h"
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#include "ctrl.h"
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void exar7300_init(struct channel *sc)
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{
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exar7300_write(sc, SBE_2T3E3_LIU_REG_REG1, 0);
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/* enable line decodeer and encoder */
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exar7300_write(sc, SBE_2T3E3_LIU_REG_REG2, 0);
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exar7300_write(sc, SBE_2T3E3_LIU_REG_REG3, 0);
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exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4,
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SBE_2T3E3_LIU_VAL_T3_MODE_SELECT |
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SBE_2T3E3_LIU_VAL_LOOPBACK_OFF);
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}
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void exar7300_set_loopback(struct channel *sc, u32 mode)
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{
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u32 val;
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switch (mode) {
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case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF:
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case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE:
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case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG:
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case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL:
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break;
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default:
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return;
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}
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val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4);
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val &= ~(SBE_2T3E3_LIU_VAL_LOCAL_LOOPBACK | SBE_2T3E3_LIU_VAL_REMOTE_LOOPBACK);
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val |= mode;
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exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val);
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#if 0
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/* TODO - is it necessary? idea from 2T3E3_HW_Test_code */
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switch (mode) {
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case SBE_2T3E3_LIU_VAL_LOOPBACK_OFF:
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break;
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case SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE:
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exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
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break;
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case SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG:
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exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF);
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break;
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case SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL:
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exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
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break;
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}
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#endif
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}
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void exar7300_set_frame_type(struct channel *sc, u32 type)
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{
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u32 val;
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switch (type) {
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case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
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case SBE_2T3E3_FRAME_TYPE_T3_M13:
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case SBE_2T3E3_FRAME_TYPE_E3_G751:
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case SBE_2T3E3_FRAME_TYPE_E3_G832:
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break;
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default:
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return;
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}
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val = exar7300_read(sc, SBE_2T3E3_LIU_REG_REG4);
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val &= ~(SBE_2T3E3_LIU_VAL_T3_MODE_SELECT |
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SBE_2T3E3_LIU_VAL_E3_MODE_SELECT);
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switch (type) {
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case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
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case SBE_2T3E3_FRAME_TYPE_T3_M13:
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val |= SBE_2T3E3_LIU_VAL_T3_MODE_SELECT;
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break;
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case SBE_2T3E3_FRAME_TYPE_E3_G751:
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case SBE_2T3E3_FRAME_TYPE_E3_G832:
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val |= SBE_2T3E3_LIU_VAL_E3_MODE_SELECT;
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break;
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default:
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return;
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}
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exar7300_write(sc, SBE_2T3E3_LIU_REG_REG4, val);
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}
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void exar7300_transmit_all_ones_onoff(struct channel *sc, u32 mode)
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{
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if (sc->p.transmit_all_ones == mode)
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return;
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switch (mode) {
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case SBE_2T3E3_ON:
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exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
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SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES);
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break;
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case SBE_2T3E3_OFF:
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exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
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SBE_2T3E3_LIU_VAL_TRANSMIT_ALL_ONES);
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break;
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default:
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return;
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}
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sc->p.transmit_all_ones = mode;
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}
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void exar7300_receive_equalization_onoff(struct channel *sc, u32 mode)
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{
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if (sc->p.receive_equalization == mode)
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return;
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switch (mode) {
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case SBE_2T3E3_OFF:
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exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG2,
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SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE);
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break;
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case SBE_2T3E3_ON:
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exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG2,
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SBE_2T3E3_LIU_VAL_RECEIVE_EQUALIZATION_DISABLE);
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break;
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default:
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return;
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}
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sc->p.receive_equalization = mode;
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}
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void exar7300_line_build_out_onoff(struct channel *sc, u32 mode)
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{
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if (sc->p.line_build_out == mode)
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return;
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switch (mode) {
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case SBE_2T3E3_OFF:
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exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
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SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT);
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exar7300_receive_equalization_onoff(sc, SBE_2T3E3_OFF);
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break;
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case SBE_2T3E3_ON:
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exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
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SBE_2T3E3_LIU_VAL_TRANSMIT_LEVEL_SELECT);
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exar7300_receive_equalization_onoff(sc, SBE_2T3E3_ON);
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break;
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default:
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return;
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}
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sc->p.line_build_out = mode;
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}
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/* TODO - what about encoder in raw mode??? disable it too? */
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void exar7300_unipolar_onoff(struct channel *sc, u32 mode)
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{
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switch (mode) {
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case SBE_2T3E3_OFF:
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exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG3,
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SBE_2T3E3_LIU_VAL_DECODER_DISABLE);
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exar7300_clear_bit(sc, SBE_2T3E3_LIU_REG_REG1,
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SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA);
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break;
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case SBE_2T3E3_ON:
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exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG3,
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SBE_2T3E3_LIU_VAL_DECODER_DISABLE);
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exar7300_set_bit(sc, SBE_2T3E3_LIU_REG_REG1,
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SBE_2T3E3_LIU_VAL_TRANSMIT_BINARY_DATA);
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break;
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}
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}
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