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
  18 static int
  19 tsi500_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
  40 static int
  41 tsi500_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
  60 DECLARE_RIO_ROUTE_OPS(RIO_VID_TUNDRA, RIO_DID_TSI500, tsi500_route_add_entry, tsi500_route_get_entry);