tsi500.c

Go to the documentation of this file.

/*
 * RapidIO Tsi500 switch support
 *
 * Copyright 2009-2010 Integrated Device Technology, Inc.
 * Alexandre Bounine <[email protected]>
 *  - Modified switch operations initialization.
 *
 * Copyright 2005 MontaVista Software, Inc.
 * Matt Porter <[email protected]>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/rio_ids.h>
#include "../rio.h"

static int
tsi500_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 route_port)
{
    int i;
    u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
    u32 result;

    if (table == 0xff) {
        rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
        result &= ~(0xf << (4*(route_destid & 0x7)));
        for (i=0;i<4;i++)
            rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*i), result | (route_port << (4*(route_destid & 0x7))));
    }
    else {
        rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);
        result &= ~(0xf << (4*(route_destid & 0x7)));
        rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*table), result | (route_port << (4*(route_destid & 0x7))));
    }

    return 0;
}

static int
tsi500_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 *route_port)
{
    int ret = 0;
    u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
    u32 result;

    if (table == 0xff)
        rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
    else
        rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);

    result &= 0xf << (4*(route_destid & 0x7));
    *route_port = result >> (4*(route_destid & 0x7));
    if (*route_port > 3)
        ret = -1;

    return ret;
}

static int tsi500_switch_init(struct rio_dev *rdev, int do_enum)
{
    pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
    rdev->rswitch->add_entry = tsi500_route_add_entry;
    rdev->rswitch->get_entry = tsi500_route_get_entry;
    rdev->rswitch->clr_table = NULL;
    rdev->rswitch->set_domain = NULL;
    rdev->rswitch->get_domain = NULL;
    rdev->rswitch->em_init = NULL;
    rdev->rswitch->em_handle = NULL;

    return 0;
}

DECLARE_RIO_SWITCH_INIT(RIO_VID_TUNDRA, RIO_DID_TSI500, tsi500_switch_init);