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/*
* 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 exar7250_init(struct channel *sc)
{
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_OPERATING_MODE,
SBE_2T3E3_FRAMER_VAL_T3_CBIT |
SBE_2T3E3_FRAMER_VAL_INTERRUPT_ENABLE_RESET |
SBE_2T3E3_FRAMER_VAL_TIMING_ASYNCH_TXINCLK);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_IO_CONTROL,
SBE_2T3E3_FRAMER_VAL_DISABLE_TX_LOSS_OF_CLOCK |
SBE_2T3E3_FRAMER_VAL_DISABLE_RX_LOSS_OF_CLOCK |
SBE_2T3E3_FRAMER_VAL_AMI_LINE_CODE |
SBE_2T3E3_FRAMER_VAL_RX_LINE_CLOCK_INVERT);
exar7250_set_frame_type(sc, SBE_2T3E3_FRAME_TYPE_T3_CBIT);
}
void exar7250_set_frame_type(struct channel *sc, u32 type)
{
u32 val;
switch (type) {
case SBE_2T3E3_FRAME_TYPE_E3_G751:
case SBE_2T3E3_FRAME_TYPE_E3_G832:
case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
case SBE_2T3E3_FRAME_TYPE_T3_M13:
break;
default:
return;
}
exar7250_stop_intr(sc, type);
val = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_OPERATING_MODE);
val &= ~(SBE_2T3E3_FRAMER_VAL_LOCAL_LOOPBACK_MODE |
SBE_2T3E3_FRAMER_VAL_T3_E3_SELECT |
SBE_2T3E3_FRAMER_VAL_FRAME_FORMAT_SELECT);
switch (type) {
case SBE_2T3E3_FRAME_TYPE_E3_G751:
val |= SBE_2T3E3_FRAMER_VAL_E3_G751;
break;
case SBE_2T3E3_FRAME_TYPE_E3_G832:
val |= SBE_2T3E3_FRAMER_VAL_E3_G832;
break;
case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
val |= SBE_2T3E3_FRAMER_VAL_T3_CBIT;
break;
case SBE_2T3E3_FRAME_TYPE_T3_M13:
val |= SBE_2T3E3_FRAMER_VAL_T3_M13;
break;
default:
return;
}
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_OPERATING_MODE, val);
exar7250_start_intr(sc, type);
}
void exar7250_start_intr(struct channel *sc, u32 type)
{
u32 val;
switch (type) {
case SBE_2T3E3_FRAME_TYPE_E3_G751:
case SBE_2T3E3_FRAME_TYPE_E3_G832:
val = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_RX_CONFIGURATION_STATUS_2);
cpld_LOS_update(sc);
sc->s.OOF = val & SBE_2T3E3_FRAMER_VAL_E3_RX_OOF ? 1 : 0;
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_RX_INTERRUPT_STATUS_1);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_E3_RX_INTERRUPT_ENABLE_1,
SBE_2T3E3_FRAMER_VAL_E3_RX_OOF_INTERRUPT_ENABLE |
SBE_2T3E3_FRAMER_VAL_E3_RX_LOS_INTERRUPT_ENABLE);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_RX_INTERRUPT_STATUS_2);
break;
case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
case SBE_2T3E3_FRAME_TYPE_T3_M13:
val = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_CONFIGURATION_STATUS);
cpld_LOS_update(sc);
sc->s.OOF = val & SBE_2T3E3_FRAMER_VAL_T3_RX_OOF ? 1 : 0;
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_INTERRUPT_STATUS);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_T3_RX_INTERRUPT_ENABLE,
SBE_2T3E3_FRAMER_VAL_T3_RX_LOS_INTERRUPT_ENABLE |
SBE_2T3E3_FRAMER_VAL_T3_RX_OOF_INTERRUPT_ENABLE);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_FEAC_INTERRUPT_ENABLE_STATUS);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_T3_RX_LAPD_CONTROL, 0);
break;
default:
return;
}
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_BLOCK_INTERRUPT_STATUS);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_BLOCK_INTERRUPT_ENABLE,
SBE_2T3E3_FRAMER_VAL_RX_INTERRUPT_ENABLE |
SBE_2T3E3_FRAMER_VAL_TX_INTERRUPT_ENABLE);
}
void exar7250_stop_intr(struct channel *sc, u32 type)
{
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_BLOCK_INTERRUPT_ENABLE, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_BLOCK_INTERRUPT_STATUS);
switch (type) {
case SBE_2T3E3_FRAME_TYPE_E3_G751:
case SBE_2T3E3_FRAME_TYPE_E3_G832:
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_E3_RX_INTERRUPT_ENABLE_1, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_RX_INTERRUPT_STATUS_1);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_E3_RX_INTERRUPT_ENABLE_2, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_RX_INTERRUPT_STATUS_2);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_E3_RX_LAPD_CONTROL, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_RX_LAPD_CONTROL);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_E3_TX_LAPD_STATUS, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_TX_LAPD_STATUS);
break;
case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
case SBE_2T3E3_FRAME_TYPE_T3_M13:
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_T3_RX_INTERRUPT_ENABLE, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_INTERRUPT_STATUS);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_T3_RX_FEAC_INTERRUPT_ENABLE_STATUS, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_FEAC_INTERRUPT_ENABLE_STATUS);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_T3_RX_LAPD_CONTROL, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_LAPD_CONTROL);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_T3_TX_FEAC_CONFIGURATION_STATUS, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_TX_FEAC_CONFIGURATION_STATUS);
exar7250_write(sc, SBE_2T3E3_FRAMER_REG_T3_TX_LAPD_STATUS, 0);
exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_TX_LAPD_STATUS);
break;
}
}
void exar7250_unipolar_onoff(struct channel *sc, u32 mode)
{
switch (mode) {
case SBE_2T3E3_OFF:
exar7300_clear_bit(sc, SBE_2T3E3_FRAMER_REG_IO_CONTROL,
SBE_2T3E3_FRAMER_VAL_UNIPOLAR);
break;
case SBE_2T3E3_ON:
exar7300_set_bit(sc, SBE_2T3E3_FRAMER_REG_IO_CONTROL,
SBE_2T3E3_FRAMER_VAL_UNIPOLAR);
break;
}
}
void exar7250_set_loopback(struct channel *sc, u32 mode)
{
switch (mode) {
case SBE_2T3E3_FRAMER_VAL_LOOPBACK_OFF:
exar7300_clear_bit(sc, SBE_2T3E3_FRAMER_REG_OPERATING_MODE,
SBE_2T3E3_FRAMER_VAL_LOCAL_LOOPBACK_MODE);
break;
case SBE_2T3E3_FRAMER_VAL_LOOPBACK_ON:
exar7300_set_bit(sc, SBE_2T3E3_FRAMER_REG_OPERATING_MODE,
SBE_2T3E3_FRAMER_VAL_LOCAL_LOOPBACK_MODE);
break;
}
}
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