LXR linux/drivers/rapidio/switches/tsi500.c

   1/*
   2 * RapidIO Tsi500 switch support
   3 *
   4 * Copyright 2005 MontaVista Software, Inc.
   5 * Matt Porter <mporter@kernel.crashing.org>
   6 *
   7 * This program is free software; you can redistribute  it and/or modify it
   8 * under  the terms of  the GNU General  Public License as published by the
   9 * Free Software Foundation;  either version 2 of the  License, or (at your
  10 * option) any later version.
  11 */
  12
  13#include <linux/rio.h>
  14#include <linux/rio_drv.h>
  15#include <linux/rio_ids.h>
  16#include "../rio.h"
  17
  18static int
  19tsi500_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 route_port)
  20{
  21        int i;
  22        u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
  23        u32 result;
  24
  25        if (table == 0xff) {
  26                rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
  27                result &= ~(0xf << (4*(route_destid & 0x7)));
  28                for (i=0;i<4;i++)
  29                        rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*i), result | (route_port << (4*(route_destid & 0x7))));
  30        }
  31        else {
  32                rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);
  33                result &= ~(0xf << (4*(route_destid & 0x7)));
  34                rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*table), result | (route_port << (4*(route_destid & 0x7))));
  35        }
  36
  37        return 0;
  38}
  39
  40static int
  41tsi500_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 *route_port)
  42{
  43        int ret = 0;
  44        u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
  45        u32 result;
  46
  47        if (table == 0xff)
  48                rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
  49        else
  50                rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);
  51
  52        result &= 0xf << (4*(route_destid & 0x7));
  53        *route_port = result >> (4*(route_destid & 0x7));
  54        if (*route_port > 3)
  55                ret = -1;
  56
  57        return ret;
  58}
  59
  60DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI500, tsi500_route_add_entry, tsi500_route_get_entry);
  61