drivers/rapidio/switches/tsi568.c

   1 /*
   2  * RapidIO Tsi568 switch support
   3  *
   4  * Copyright 2009-2010 Integrated Device Technology, Inc.
   5  * Alexandre Bounine <alexandre.bounine@idt.com>
   6  *  - Added EM support
   7  *  - Modified switch operations initialization.
   8  *
   9  * Copyright 2005 MontaVista Software, Inc.
  10  * Matt Porter <mporter@kernel.crashing.org>
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17
  18 #include <linux/rio.h>
  19 #include <linux/rio_drv.h>
  20 #include <linux/rio_ids.h>
  21 #include <linux/delay.h>
  22 #include <linux/module.h>
  23 #include "../rio.h"
  24
  25 /* Global (broadcast) route registers */
  26 #define SPBC_ROUTE_CFG_DESTID   0x10070
  27 #define SPBC_ROUTE_CFG_PORT     0x10074
  28
  29 /* Per port route registers */
  30 #define SPP_ROUTE_CFG_DESTID(n) (0x11070 + 0x100*n)
  31 #define SPP_ROUTE_CFG_PORT(n)   (0x11074 + 0x100*n)
  32
  33 #define TSI568_SP_MODE(n)       (0x11004 + 0x100*n)
  34 #define  TSI568_SP_MODE_PW_DIS  0x08000000
  35
  36 static int
  37 tsi568_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
  38                        u16 table, u16 route_destid, u8 route_port)
  39 {
  40         if (table == RIO_GLOBAL_TABLE) {
  41                 rio_mport_write_config_32(mport, destid, hopcount,
  42                                         SPBC_ROUTE_CFG_DESTID, route_destid);
  43                 rio_mport_write_config_32(mport, destid, hopcount,
  44                                         SPBC_ROUTE_CFG_PORT, route_port);
  45         } else {
  46                 rio_mport_write_config_32(mport, destid, hopcount,
  47                                         SPP_ROUTE_CFG_DESTID(table),
  48                                         route_destid);
  49                 rio_mport_write_config_32(mport, destid, hopcount,
  50                                         SPP_ROUTE_CFG_PORT(table), route_port);
  51         }
  52
  53         udelay(10);
  54
  55         return 0;
  56 }
  57
  58 static int
  59 tsi568_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount,
  60                        u16 table, u16 route_destid, u8 *route_port)
  61 {
  62         int ret = 0;
  63         u32 result;
  64
  65         if (table == RIO_GLOBAL_TABLE) {
  66                 rio_mport_write_config_32(mport, destid, hopcount,
  67                                         SPBC_ROUTE_CFG_DESTID, route_destid);
  68                 rio_mport_read_config_32(mport, destid, hopcount,
  69                                         SPBC_ROUTE_CFG_PORT, &result);
  70         } else {
  71                 rio_mport_write_config_32(mport, destid, hopcount,
  72                                         SPP_ROUTE_CFG_DESTID(table),
  73                                         route_destid);
  74                 rio_mport_read_config_32(mport, destid, hopcount,
  75                                         SPP_ROUTE_CFG_PORT(table), &result);
  76         }
  77
  78         *route_port = result;
  79         if (*route_port > 15)
  80                 ret = -1;
  81
  82         return ret;
  83 }
  84
  85 static int
  86 tsi568_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount,
  87                        u16 table)
  88 {
  89         u32 route_idx;
  90         u32 lut_size;
  91
  92         lut_size = (mport->sys_size) ? 0x1ff : 0xff;
  93
  94         if (table == RIO_GLOBAL_TABLE) {
  95                 rio_mport_write_config_32(mport, destid, hopcount,
  96                                         SPBC_ROUTE_CFG_DESTID, 0x80000000);
  97                 for (route_idx = 0; route_idx <= lut_size; route_idx++)
  98                         rio_mport_write_config_32(mport, destid, hopcount,
  99                                                 SPBC_ROUTE_CFG_PORT,
 100                                                 RIO_INVALID_ROUTE);
 101         } else {
 102                 rio_mport_write_config_32(mport, destid, hopcount,
 103                                         SPP_ROUTE_CFG_DESTID(table),
 104                                         0x80000000);
 105                 for (route_idx = 0; route_idx <= lut_size; route_idx++)
 106                         rio_mport_write_config_32(mport, destid, hopcount,
 107                                                 SPP_ROUTE_CFG_PORT(table),
 108                                                 RIO_INVALID_ROUTE);
 109         }
 110
 111         return 0;
 112 }
 113
 114 static int
 115 tsi568_em_init(struct rio_dev *rdev)
 116 {
 117         u32 regval;
 118         int portnum;
 119
 120         pr_debug("TSI568 %s [%d:%d]\n", __func__, rdev->destid, rdev->hopcount);
 121
 122         /* Make sure that Port-Writes are disabled (for all ports) */
 123         for (portnum = 0;
 124              portnum < RIO_GET_TOTAL_PORTS(rdev->swpinfo); portnum++) {
 125                 rio_read_config_32(rdev, TSI568_SP_MODE(portnum), &regval);
 126                 rio_write_config_32(rdev, TSI568_SP_MODE(portnum),
 127                                     regval | TSI568_SP_MODE_PW_DIS);
 128         }
 129
 130         return 0;
 131 }
 132
 133 static struct rio_switch_ops tsi568_switch_ops = {
 134         .owner = THIS_MODULE,
 135         .add_entry = tsi568_route_add_entry,
 136         .get_entry = tsi568_route_get_entry,
 137         .clr_table = tsi568_route_clr_table,
 138         .set_domain = NULL,
 139         .get_domain = NULL,
 140         .em_init = tsi568_em_init,
 141         .em_handle = NULL,
 142 };
 143
 144 static int tsi568_probe(struct rio_dev *rdev, const struct rio_device_id *id)
 145 {
 146         pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
 147
 148         spin_lock(&rdev->rswitch->lock);
 149
 150         if (rdev->rswitch->ops) {
 151                 spin_unlock(&rdev->rswitch->lock);
 152                 return -EINVAL;
 153         }
 154
 155         rdev->rswitch->ops = &tsi568_switch_ops;
 156         spin_unlock(&rdev->rswitch->lock);
 157         return 0;
 158 }
 159
 160 static void tsi568_remove(struct rio_dev *rdev)
 161 {
 162         pr_debug("RIO: %s for %s\n", __func__, rio_name(rdev));
 163         spin_lock(&rdev->rswitch->lock);
 164         if (rdev->rswitch->ops != &tsi568_switch_ops) {
 165                 spin_unlock(&rdev->rswitch->lock);
 166                 return;
 167         }
 168         rdev->rswitch->ops = NULL;
 169         spin_unlock(&rdev->rswitch->lock);
 170 }
 171
 172 static const struct rio_device_id tsi568_id_table[] = {
 173         {RIO_DEVICE(RIO_DID_TSI568, RIO_VID_TUNDRA)},
 174         { 0, }  /* terminate list */
 175 };
 176
 177 static struct rio_driver tsi568_driver = {
 178         .name = "tsi568",
 179         .id_table = tsi568_id_table,
 180         .probe = tsi568_probe,
 181         .remove = tsi568_remove,
 182 };
 183
 184 static int __init tsi568_init(void)
 185 {
 186         return rio_register_driver(&tsi568_driver);
 187 }
 188
 189 static void __exit tsi568_exit(void)
 190 {
 191         rio_unregister_driver(&tsi568_driver);
 192 }
 193
 194 device_initcall(tsi568_init);
 195 module_exit(tsi568_exit);
 196
 197 MODULE_DESCRIPTION("IDT Tsi568 Serial RapidIO switch driver");
 198 MODULE_AUTHOR("Integrated Device Technology, Inc.");
 199 MODULE_LICENSE("GPL");