drivers/rapidio/switches/tsi500.c

   1 /*
   2  * RapidIO Tsi500 switch support
   3  *
   4  * Copyright 2009-2010 Integrated Device Technology, Inc.
   5  * Alexandre Bounine <alexandre.bounine@idt.com>
   6  *  - Modified switch operations initialization.
   7  *
   8  * Copyright 2005 MontaVista Software, Inc.
   9  * Matt Porter <mporter@kernel.crashing.org>
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  */
  16
  17 #include <linux/rio.h>
  18 #include <linux/rio_drv.h>
  19 #include <linux/rio_ids.h>
  20 #include "../rio.h"
  21
  22 static int
  23 tsi500_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 route_port)
  24 {
  25         int i;
  26         u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
  27         u32 result;
  28
  29         if (table == 0xff) {
  30                 rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
  31                 result &= ~(0xf << (4*(route_destid & 0x7)));
  32                 for (i=0;i<4;i++)
  33                         rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*i), result | (route_port << (4*(route_destid & 0x7))));
  34         }
  35         else {
  36                 rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);
  37                 result &= ~(0xf << (4*(route_destid & 0x7)));
  38                 rio_mport_write_config_32(mport, destid, hopcount, offset + (0x20000*table), result | (route_port << (4*(route_destid & 0x7))));
  39         }
  40
  41         return 0;
  42 }
  43
  44 static int
  45 tsi500_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, u16 table, u16 route_destid, u8 *route_port)
  46 {
  47         int ret = 0;
  48         u32 offset = 0x10000 + 0xa00 + ((route_destid / 2)&~0x3);
  49         u32 result;
  50
  51         if (table == 0xff)
  52                 rio_mport_read_config_32(mport, destid, hopcount, offset, &result);
  53         else
  54                 rio_mport_read_config_32(mport, destid, hopcount, offset + (0x20000*table), &result);
  55
  56         result &= 0xf << (4*(route_destid & 0x7));
  57         *route_port = result >> (4*(route_destid & 0x7));
  58         if (*route_port > 3)
  59                 ret = -1;
  60
  61         return ret;
  62 }
  63
  64 static int tsi500_switch_init(struct rio_dev *rdev, int do_enum)
  65 {
  66         pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
  67         rdev->rswitch->add_entry = tsi500_route_add_entry;
  68         rdev->rswitch->get_entry = tsi500_route_get_entry;
  69         rdev->rswitch->clr_table = NULL;
  70         rdev->rswitch->set_domain = NULL;
  71         rdev->rswitch->get_domain = NULL;
  72         rdev->rswitch->em_init = NULL;
  73         rdev->rswitch->em_handle = NULL;
  74
  75         return 0;
  76 }
  77
  78 DECLARE_RIO_SWITCH_INIT(RIO_VID_TUNDRA, RIO_DID_TSI500, tsi500_switch_init);