ctrl.c

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/*
 * SBE 2T3E3 synchronous serial card driver for Linux
 *
 * Copyright (C) 2009-2010 Krzysztof Halasa <[email protected]>
 *
 * 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 <linux/types.h>
#include "2t3e3.h"
#include "ctrl.h"

void t3e3_set_frame_type(struct channel *sc, u32 mode)
{
    if (sc->p.frame_type == mode)
        return;

    if (sc->r.flags & SBE_2T3E3_FLAG_NETWORK_UP) {
        dev_err(&sc->pdev->dev, "SBE 2T3E3: changing frame type during active connection\n");
        return;
    }

    exar7300_set_frame_type(sc, mode);
    exar7250_set_frame_type(sc, mode);
    cpld_set_frame_type(sc, mode);

    sc->p.frame_type = mode;
}

void t3e3_set_loopback(struct channel *sc, u32 mode)
{
    u32 tx, rx;

    if (sc->p.loopback == mode)
        return;

    tx = sc->p.transmitter_on;
    rx = sc->p.receiver_on;
    if (tx == SBE_2T3E3_ON)
        dc_transmitter_onoff(sc, SBE_2T3E3_OFF);
    if (rx == SBE_2T3E3_ON)
        dc_receiver_onoff(sc, SBE_2T3E3_OFF);

    /* stop current loopback if any exists */
    switch (sc->p.loopback) {
    case SBE_2T3E3_LOOPBACK_NONE:
        break;
    case SBE_2T3E3_LOOPBACK_ETHERNET:
        dc_set_loopback(sc, SBE_2T3E3_21143_VAL_LOOPBACK_OFF);
        break;
    case SBE_2T3E3_LOOPBACK_FRAMER:
        exar7250_set_loopback(sc, SBE_2T3E3_FRAMER_VAL_LOOPBACK_OFF);
        break;
    case SBE_2T3E3_LOOPBACK_LIU_DIGITAL:
    case SBE_2T3E3_LOOPBACK_LIU_ANALOG:
    case SBE_2T3E3_LOOPBACK_LIU_REMOTE:
        exar7300_set_loopback(sc, SBE_2T3E3_LIU_VAL_LOOPBACK_OFF);
        break;
    default:
        return;
    }

    switch (mode) {
    case SBE_2T3E3_LOOPBACK_NONE:
        break;
    case SBE_2T3E3_LOOPBACK_ETHERNET:
        dc_set_loopback(sc, SBE_2T3E3_21143_VAL_LOOPBACK_INTERNAL);
        break;
    case SBE_2T3E3_LOOPBACK_FRAMER:
        exar7250_set_loopback(sc, SBE_2T3E3_FRAMER_VAL_LOOPBACK_ON);
        break;
    case SBE_2T3E3_LOOPBACK_LIU_DIGITAL:
        exar7300_set_loopback(sc, SBE_2T3E3_LIU_VAL_LOOPBACK_DIGITAL);
        break;
    case SBE_2T3E3_LOOPBACK_LIU_ANALOG:
        exar7300_set_loopback(sc, SBE_2T3E3_LIU_VAL_LOOPBACK_ANALOG);
        break;
    case SBE_2T3E3_LOOPBACK_LIU_REMOTE:
        exar7300_set_loopback(sc, SBE_2T3E3_LIU_VAL_LOOPBACK_REMOTE);
        break;
    default:
        return;
    }

    sc->p.loopback = mode;

    if (tx == SBE_2T3E3_ON)
        dc_transmitter_onoff(sc, SBE_2T3E3_ON);
    if (rx == SBE_2T3E3_ON)
        dc_receiver_onoff(sc, SBE_2T3E3_ON);
}


void t3e3_reg_read(struct channel *sc, u32 *reg, u32 *val)
{
    u32 i;

    *val = 0;

    switch (reg[0]) {
    case SBE_2T3E3_CHIP_21143:
        if (!(reg[1] & 7))
            *val = dc_read(sc->addr, reg[1] / 8);
        break;
    case SBE_2T3E3_CHIP_CPLD:
        for (i = 0; i < SBE_2T3E3_CPLD_REG_MAX; i++)
            if (cpld_reg_map[i][sc->h.slot] == reg[1]) {
                *val = cpld_read(sc, i);
                break;
            }
        break;
    case SBE_2T3E3_CHIP_FRAMER:
        for (i = 0; i < SBE_2T3E3_FRAMER_REG_MAX; i++)
            if (t3e3_framer_reg_map[i] == reg[1]) {
                *val = exar7250_read(sc, i);
                break;
            }
        break;
    case SBE_2T3E3_CHIP_LIU:
        for (i = 0; i < SBE_2T3E3_LIU_REG_MAX; i++)
            if (t3e3_liu_reg_map[i] == reg[1]) {
                *val = exar7300_read(sc, i);
                break;
            }
        break;
    default:
        break;
    }
}

void t3e3_reg_write(struct channel *sc, u32 *reg)
{
    u32 i;

    switch (reg[0]) {
    case SBE_2T3E3_CHIP_21143:
        dc_write(sc->addr, reg[1], reg[2]);
        break;
    case SBE_2T3E3_CHIP_CPLD:
        for (i = 0; i < SBE_2T3E3_CPLD_REG_MAX; i++)
            if (cpld_reg_map[i][sc->h.slot] == reg[1]) {
                cpld_write(sc, i, reg[2]);
                break;
            }
        break;
    case SBE_2T3E3_CHIP_FRAMER:
        for (i = 0; i < SBE_2T3E3_FRAMER_REG_MAX; i++)
            if (t3e3_framer_reg_map[i] == reg[1]) {
                exar7250_write(sc, i, reg[2]);
                break;
            }
        break;
    case SBE_2T3E3_CHIP_LIU:
        for (i = 0; i < SBE_2T3E3_LIU_REG_MAX; i++)
            if (t3e3_liu_reg_map[i] == reg[1]) {
                exar7300_write(sc, i, reg[2]);
                break;
            }
        break;
    }
}

void t3e3_port_get(struct channel *sc, t3e3_param_t *param)
{
    memcpy(param, &(sc->p), sizeof(t3e3_param_t));
}

void t3e3_port_set(struct channel *sc, t3e3_param_t *param)
{
    if (param->frame_mode != 0xff)
        cpld_set_frame_mode(sc, param->frame_mode);

    if (param->fractional_mode != 0xff)
        cpld_set_fractional_mode(sc, param->fractional_mode,
                     param->bandwidth_start,
                     param->bandwidth_stop);

    if (param->pad_count != 0xff)
        cpld_set_pad_count(sc, param->pad_count);

    if (param->crc != 0xff)
        cpld_set_crc(sc, param->crc);

    if (param->receiver_on != 0xff)
        dc_receiver_onoff(sc, param->receiver_on);

    if (param->transmitter_on != 0xff)
        dc_transmitter_onoff(sc, param->transmitter_on);

    if (param->frame_type != 0xff)
        t3e3_set_frame_type(sc, param->frame_type);

    if (param->panel != 0xff)
        cpld_select_panel(sc, param->panel);

    if (param->line_build_out != 0xff)
        exar7300_line_build_out_onoff(sc, param->line_build_out);

    if (param->receive_equalization != 0xff)
        exar7300_receive_equalization_onoff(sc, param->receive_equalization);

    if (param->transmit_all_ones != 0xff)
        exar7300_transmit_all_ones_onoff(sc, param->transmit_all_ones);

    if (param->loopback != 0xff)
        t3e3_set_loopback(sc, param->loopback);

    if (param->clock_source != 0xff)
        cpld_set_clock(sc, param->clock_source);

    if (param->scrambler != 0xff)
        cpld_set_scrambler(sc, param->scrambler);
}

void t3e3_port_get_stats(struct channel *sc,
             t3e3_stats_t *stats)
{
    u32 result;

    sc->s.LOC = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_IO_CONTROL)
        & SBE_2T3E3_FRAMER_VAL_LOSS_OF_CLOCK_STATUS ? 1 : 0;

    switch (sc->p.frame_type) {
    case SBE_2T3E3_FRAME_TYPE_E3_G751:
    case SBE_2T3E3_FRAME_TYPE_E3_G832:
        result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_E3_RX_CONFIGURATION_STATUS_2);
        sc->s.LOF = result & SBE_2T3E3_FRAMER_VAL_E3_RX_LOF ? 1 : 0;
        sc->s.OOF = result & SBE_2T3E3_FRAMER_VAL_E3_RX_OOF ? 1 : 0;

        cpld_LOS_update(sc);

        sc->s.AIS = result & SBE_2T3E3_FRAMER_VAL_E3_RX_AIS ? 1 : 0;
        sc->s.FERF = result & SBE_2T3E3_FRAMER_VAL_E3_RX_FERF ? 1 : 0;
        break;

    case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
    case SBE_2T3E3_FRAME_TYPE_T3_M13:
        result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_CONFIGURATION_STATUS);
        sc->s.AIS = result & SBE_2T3E3_FRAMER_VAL_T3_RX_AIS ? 1 : 0;

        cpld_LOS_update(sc);

        sc->s.IDLE = result & SBE_2T3E3_FRAMER_VAL_T3_RX_IDLE ? 1 : 0;
        sc->s.OOF = result & SBE_2T3E3_FRAMER_VAL_T3_RX_OOF ? 1 : 0;

        result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_STATUS);
        sc->s.FERF = result & SBE_2T3E3_FRAMER_VAL_T3_RX_FERF ? 1 : 0;
        sc->s.AIC = result & SBE_2T3E3_FRAMER_VAL_T3_RX_AIC ? 1 : 0;
        sc->s.FEBE_code = result & SBE_2T3E3_FRAMER_VAL_T3_RX_FEBE;

        sc->s.FEAC = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_T3_RX_FEAC);
        break;

    default:
        break;
    }

    result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_LCV_EVENT_COUNT_MSB) << 8;
    result += exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_HOLDING_REGISTER);
    sc->s.LCV += result;

    result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_FRAMING_BIT_ERROR_EVENT_COUNT_MSB) << 8;
    result += exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_HOLDING_REGISTER);
    sc->s.FRAMING_BIT += result;

    result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_PARITY_ERROR_EVENT_COUNT_MSB) << 8;
    result += exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_HOLDING_REGISTER);
    sc->s.PARITY_ERROR += result;

    result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_FEBE_EVENT_COUNT_MSB) << 8;
    result += exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_HOLDING_REGISTER);
    sc->s.FEBE_count += result;

    result = exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_CP_BIT_ERROR_EVENT_COUNT_MSB) << 8;
    result += exar7250_read(sc, SBE_2T3E3_FRAMER_REG_PMON_HOLDING_REGISTER);
    sc->s.CP_BIT += result;

    memcpy(stats, &(sc->s), sizeof(t3e3_stats_t));
}

void t3e3_port_del_stats(struct channel *sc)
{
    memset(&(sc->s), 0, sizeof(t3e3_stats_t));
}

void t3e3_if_config(struct channel *sc, u32 cmd, char *set,
            t3e3_resp_t *ret, int *rlen)
{
    t3e3_param_t *param = (t3e3_param_t *)set;
    u32 *data = (u32 *)set;

    /* turn off all interrupt */
    /* cpld_stop_intr(sc); */

    switch (cmd) {
    case SBE_2T3E3_PORT_GET:
        t3e3_port_get(sc, &(ret->u.param));
        *rlen = sizeof(ret->u.param);
        break;
    case SBE_2T3E3_PORT_SET:
        t3e3_port_set(sc, param);
        *rlen = 0;
        break;
    case SBE_2T3E3_PORT_GET_STATS:
        t3e3_port_get_stats(sc, &(ret->u.stats));
        *rlen = sizeof(ret->u.stats);
        break;
    case SBE_2T3E3_PORT_DEL_STATS:
        t3e3_port_del_stats(sc);
        *rlen = 0;
        break;
    case SBE_2T3E3_PORT_READ_REGS:
        t3e3_reg_read(sc, data, &(ret->u.data));
        *rlen = sizeof(ret->u.data);
        break;
    case SBE_2T3E3_PORT_WRITE_REGS:
        t3e3_reg_write(sc, data);
        *rlen = 0;
        break;
    case SBE_2T3E3_LOG_LEVEL:
        *rlen = 0;
        break;
    default:
        *rlen = 0;
        break;
    }
}

void t3e3_sc_init(struct channel *sc)
{
    memset(sc, 0, sizeof(*sc));

    sc->p.frame_mode = SBE_2T3E3_FRAME_MODE_HDLC;
    sc->p.fractional_mode = SBE_2T3E3_FRACTIONAL_MODE_NONE;
    sc->p.crc = SBE_2T3E3_CRC_32;
    sc->p.receiver_on = SBE_2T3E3_OFF;
    sc->p.transmitter_on = SBE_2T3E3_OFF;
    sc->p.frame_type = SBE_2T3E3_FRAME_TYPE_T3_CBIT;
    sc->p.panel = SBE_2T3E3_PANEL_FRONT;
    sc->p.line_build_out = SBE_2T3E3_OFF;
    sc->p.receive_equalization = SBE_2T3E3_OFF;
    sc->p.transmit_all_ones = SBE_2T3E3_OFF;
    sc->p.loopback = SBE_2T3E3_LOOPBACK_NONE;
    sc->p.clock_source = SBE_2T3E3_TIMING_LOCAL;
    sc->p.scrambler = SBE_2T3E3_SCRAMBLER_OFF;
    sc->p.pad_count = SBE_2T3E3_PAD_COUNT_1;
}