drivers/rapidio/switches/idtcps.c

   1 /*
   2  * IDT CPS RapidIO switches support
   3  *
   4  * Copyright 2009-2010 Integrated Device Technology, Inc.
   5  * Alexandre Bounine <alexandre.bounine@idt.com>
   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 #define CPS_DEFAULT_ROUTE       0xde
  19 #define CPS_NO_ROUTE            0xdf
  20
  21 #define IDTCPS_RIO_DOMAIN 0xf20020
  22
  23 static int
  24 idtcps_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
  25                        u16 table, u16 route_destid, u8 route_port)
  26 {
  27         u32 result;
  28
  29         if (route_port == RIO_INVALID_ROUTE)
  30                 route_port = CPS_DEFAULT_ROUTE;
  31
  32         if (table == RIO_GLOBAL_TABLE) {
  33                 rio_mport_write_config_32(mport, destid, hopcount,
  34                                 RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
  35
  36                 rio_mport_read_config_32(mport, destid, hopcount,
  37                                 RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
  38
  39                 result = (0xffffff00 & result) | (u32)route_port;
  40                 rio_mport_write_config_32(mport, destid, hopcount,
  41                                 RIO_STD_RTE_CONF_PORT_SEL_CSR, result);
  42         }
  43
  44         return 0;
  45 }
  46
  47 static int
  48 idtcps_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
  49                        u16 table, u16 route_destid, u8 *route_port)
  50 {
  51         u32 result;
  52
  53         if (table == RIO_GLOBAL_TABLE) {
  54                 rio_mport_write_config_32(mport, destid, hopcount,
  55                                 RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid);
  56
  57                 rio_mport_read_config_32(mport, destid, hopcount,
  58                                 RIO_STD_RTE_CONF_PORT_SEL_CSR, &result);
  59
  60                 if (CPS_DEFAULT_ROUTE == (u8)result ||
  61                     CPS_NO_ROUTE == (u8)result)
  62                         *route_port = RIO_INVALID_ROUTE;
  63                 else
  64                         *route_port = (u8)result;
  65         }
  66
  67         return 0;
  68 }
  69
  70 static int
  71 idtcps_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
  72                        u16 table)
  73 {
  74         u32 i;
  75
  76         if (table == RIO_GLOBAL_TABLE) {
  77                 for (i = 0x80000000; i <= 0x800000ff;) {
  78                         rio_mport_write_config_32(mport, destid, hopcount,
  79                                 RIO_STD_RTE_CONF_DESTID_SEL_CSR, i);
  80                         rio_mport_write_config_32(mport, destid, hopcount,
  81                                 RIO_STD_RTE_CONF_PORT_SEL_CSR,
  82                                 (CPS_DEFAULT_ROUTE << 24) |
  83                                 (CPS_DEFAULT_ROUTE << 16) |
  84                                 (CPS_DEFAULT_ROUTE << 8) | CPS_DEFAULT_ROUTE);
  85                         i += 4;
  86                 }
  87         }
  88
  89         return 0;
  90 }
  91
  92 static int
  93 idtcps_set_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
  94                        u8 sw_domain)
  95 {
  96         /*
  97          * Switch domain configuration operates only at global level
  98          */
  99         rio_mport_write_config_32(mport, destid, hopcount,
 100                                   IDTCPS_RIO_DOMAIN, (u32)sw_domain);
 101         return 0;
 102 }
 103
 104 static int
 105 idtcps_get_domain(struct rio_mport *mport, u16 destid, u8 hopcount,
 106                        u8 *sw_domain)
 107 {
 108         u32 regval;
 109
 110         /*
 111          * Switch domain configuration operates only at global level
 112          */
 113         rio_mport_read_config_32(mport, destid, hopcount,
 114                                 IDTCPS_RIO_DOMAIN, &regval);
 115
 116         *sw_domain = (u8)(regval & 0xff);
 117
 118         return 0;
 119 }
 120
 121 static int idtcps_switch_init(struct rio_dev *rdev, int do_enum)
 122 {
 123         pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
 124         rdev->rswitch->add_entry = idtcps_route_add_entry;
 125         rdev->rswitch->get_entry = idtcps_route_get_entry;
 126         rdev->rswitch->clr_table = idtcps_route_clr_table;
 127         rdev->rswitch->set_domain = idtcps_set_domain;
 128         rdev->rswitch->get_domain = idtcps_get_domain;
 129         rdev->rswitch->em_init = NULL;
 130         rdev->rswitch->em_handle = NULL;
 131
 132         if (do_enum) {
 133                 /* set TVAL = ~50us */
 134                 rio_write_config_32(rdev,
 135                         rdev->phys_efptr + RIO_PORT_LINKTO_CTL_CSR, 0x8e << 8);
 136                 /* Ensure that default routing is disabled on startup */
 137                 rio_write_config_32(rdev,
 138                                     RIO_STD_RTE_DEFAULT_PORT, CPS_NO_ROUTE);
 139         }
 140
 141         return 0;
 142 }
 143
 144 DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS6Q, idtcps_switch_init);
 145 DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS8, idtcps_switch_init);
 146 DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS10Q, idtcps_switch_init);
 147 DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS12, idtcps_switch_init);
 148 DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDTCPS16, idtcps_switch_init);
 149 DECLARE_RIO_SWITCH_INIT(RIO_VID_IDT, RIO_DID_IDT70K200, idtcps_switch_init);