drivers/net/ixp2000/enp2611.c

   1 /*
   2  * IXP2400 MSF network device driver for the Radisys ENP2611
   3  * Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
   4  * Dedicated to Marija Kulikova.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/config.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/init.h>
  18 #include <linux/moduleparam.h>
  19 #include <asm/hardware/uengine.h>
  20 #include <asm/mach-types.h>
  21 #include <asm/io.h>
  22 #include "ixpdev.h"
  23 #include "caleb.h"
  24 #include "ixp2400-msf.h"
  25 #include "pm3386.h"
  26
  27 /***********************************************************************
  28  * The Radisys ENP2611 is a PCI form factor board with three SFP GBIC
  29  * slots, connected via two PMC/Sierra 3386s and an SPI-3 bridge FPGA
  30  * to the IXP2400.
  31  *
  32  *                +-------------+
  33  * SFP GBIC #0 ---+             |       +---------+
  34  *                |  PM3386 #0  +-------+         |
  35  * SFP GBIC #1 ---+             |       | "Caleb" |         +---------+
  36  *                +-------------+       |         |         |         |
  37  *                                      | SPI-3   +---------+ IXP2400 |
  38  *                +-------------+       | bridge  |         |         |
  39  * SFP GBIC #2 ---+             |       | FPGA    |         +---------+
  40  *                |  PM3386 #1  +-------+         |
  41  *                |             |       +---------+
  42  *                +-------------+
  43  *              ^                   ^                  ^
  44  *              | 1.25Gbaud         | 104MHz           | 104MHz
  45  *              | SERDES ea.        | SPI-3 ea.        | SPI-3
  46  *
  47  ***********************************************************************/
  48 static struct ixp2400_msf_parameters enp2611_msf_parameters =
  49 {
  50         .rx_mode =              IXP2400_RX_MODE_UTOPIA_POS |
  51                                 IXP2400_RX_MODE_1x32 |
  52                                 IXP2400_RX_MODE_MPHY |
  53                                 IXP2400_RX_MODE_MPHY_32 |
  54                                 IXP2400_RX_MODE_MPHY_POLLED_STATUS |
  55                                 IXP2400_RX_MODE_MPHY_LEVEL3 |
  56                                 IXP2400_RX_MODE_RBUF_SIZE_64,
  57
  58         .rxclk01_multiplier =   IXP2400_PLL_MULTIPLIER_16,
  59
  60         .rx_poll_ports =        3,
  61
  62         .rx_channel_mode = {
  63                 IXP2400_PORT_RX_MODE_MASTER |
  64                 IXP2400_PORT_RX_MODE_POS_PHY |
  65                 IXP2400_PORT_RX_MODE_POS_PHY_L3 |
  66                 IXP2400_PORT_RX_MODE_ODD_PARITY |
  67                 IXP2400_PORT_RX_MODE_2_CYCLE_DECODE,
  68
  69                 IXP2400_PORT_RX_MODE_MASTER |
  70                 IXP2400_PORT_RX_MODE_POS_PHY |
  71                 IXP2400_PORT_RX_MODE_POS_PHY_L3 |
  72                 IXP2400_PORT_RX_MODE_ODD_PARITY |
  73                 IXP2400_PORT_RX_MODE_2_CYCLE_DECODE,
  74
  75                 IXP2400_PORT_RX_MODE_MASTER |
  76                 IXP2400_PORT_RX_MODE_POS_PHY |
  77                 IXP2400_PORT_RX_MODE_POS_PHY_L3 |
  78                 IXP2400_PORT_RX_MODE_ODD_PARITY |
  79                 IXP2400_PORT_RX_MODE_2_CYCLE_DECODE,
  80
  81                 IXP2400_PORT_RX_MODE_MASTER |
  82                 IXP2400_PORT_RX_MODE_POS_PHY |
  83                 IXP2400_PORT_RX_MODE_POS_PHY_L3 |
  84                 IXP2400_PORT_RX_MODE_ODD_PARITY |
  85                 IXP2400_PORT_RX_MODE_2_CYCLE_DECODE
  86         },
  87
  88         .tx_mode =              IXP2400_TX_MODE_UTOPIA_POS |
  89                                 IXP2400_TX_MODE_1x32 |
  90                                 IXP2400_TX_MODE_MPHY |
  91                                 IXP2400_TX_MODE_MPHY_32 |
  92                                 IXP2400_TX_MODE_MPHY_POLLED_STATUS |
  93                                 IXP2400_TX_MODE_MPHY_LEVEL3 |
  94                                 IXP2400_TX_MODE_TBUF_SIZE_64,
  95
  96         .txclk01_multiplier =   IXP2400_PLL_MULTIPLIER_16,
  97
  98         .tx_poll_ports =        3,
  99
 100         .tx_channel_mode = {
 101                 IXP2400_PORT_TX_MODE_MASTER |
 102                 IXP2400_PORT_TX_MODE_POS_PHY |
 103                 IXP2400_PORT_TX_MODE_ODD_PARITY |
 104                 IXP2400_PORT_TX_MODE_2_CYCLE_DECODE,
 105
 106                 IXP2400_PORT_TX_MODE_MASTER |
 107                 IXP2400_PORT_TX_MODE_POS_PHY |
 108                 IXP2400_PORT_TX_MODE_ODD_PARITY |
 109                 IXP2400_PORT_TX_MODE_2_CYCLE_DECODE,
 110
 111                 IXP2400_PORT_TX_MODE_MASTER |
 112                 IXP2400_PORT_TX_MODE_POS_PHY |
 113                 IXP2400_PORT_TX_MODE_ODD_PARITY |
 114                 IXP2400_PORT_TX_MODE_2_CYCLE_DECODE,
 115
 116                 IXP2400_PORT_TX_MODE_MASTER |
 117                 IXP2400_PORT_TX_MODE_POS_PHY |
 118                 IXP2400_PORT_TX_MODE_ODD_PARITY |
 119                 IXP2400_PORT_TX_MODE_2_CYCLE_DECODE
 120         }
 121 };
 122
 123 struct enp2611_ixpdev_priv
 124 {
 125         struct ixpdev_priv              ixpdev_priv;
 126         struct net_device_stats         stats;
 127 };
 128
 129 static struct net_device *nds[3];
 130 static struct timer_list link_check_timer;
 131
 132 static struct net_device_stats *enp2611_get_stats(struct net_device *dev)
 133 {
 134         struct enp2611_ixpdev_priv *ip = netdev_priv(dev);
 135
 136         pm3386_get_stats(ip->ixpdev_priv.channel, &(ip->stats));
 137
 138         return &(ip->stats);
 139 }
 140
 141 /* @@@ Poll the SFP moddef0 line too.  */
 142 /* @@@ Try to use the pm3386 DOOL interrupt as well.  */
 143 static void enp2611_check_link_status(unsigned long __dummy)
 144 {
 145         int i;
 146
 147         for (i = 0; i < 3; i++) {
 148                 struct net_device *dev;
 149                 int status;
 150
 151                 dev = nds[i];
 152                 if (dev == NULL)
 153                         continue;
 154
 155                 status = pm3386_is_link_up(i);
 156                 if (status && !netif_carrier_ok(dev)) {
 157                         /* @@@ Should report autonegotiation status.  */
 158                         printk(KERN_INFO "%s: NIC Link is Up\n", dev->name);
 159
 160                         pm3386_enable_tx(i);
 161                         caleb_enable_tx(i);
 162                         netif_carrier_on(dev);
 163                 } else if (!status && netif_carrier_ok(dev)) {
 164                         printk(KERN_INFO "%s: NIC Link is Down\n", dev->name);
 165
 166                         netif_carrier_off(dev);
 167                         caleb_disable_tx(i);
 168                         pm3386_disable_tx(i);
 169                 }
 170         }
 171
 172         link_check_timer.expires = jiffies + HZ / 10;
 173         add_timer(&link_check_timer);
 174 }
 175
 176 static void enp2611_set_port_admin_status(int port, int up)
 177 {
 178         if (up) {
 179                 caleb_enable_rx(port);
 180
 181                 pm3386_set_carrier(port, 1);
 182                 pm3386_enable_rx(port);
 183         } else {
 184                 caleb_disable_tx(port);
 185                 pm3386_disable_tx(port);
 186                 /* @@@ Flush out pending packets.  */
 187                 pm3386_set_carrier(port, 0);
 188
 189                 pm3386_disable_rx(port);
 190                 caleb_disable_rx(port);
 191         }
 192 }
 193
 194 static int __init enp2611_init_module(void)
 195 {
 196         int ports;
 197         int i;
 198
 199         if (!machine_is_enp2611())
 200                 return -ENODEV;
 201
 202         caleb_reset();
 203         pm3386_reset();
 204
 205         ports = pm3386_port_count();
 206         for (i = 0; i < ports; i++) {
 207                 nds[i] = ixpdev_alloc(i, sizeof(struct enp2611_ixpdev_priv));
 208                 if (nds[i] == NULL) {
 209                         while (--i >= 0)
 210                                 free_netdev(nds[i]);
 211                         return -ENOMEM;
 212                 }
 213
 214                 SET_MODULE_OWNER(nds[i]);
 215                 nds[i]->get_stats = enp2611_get_stats;
 216                 pm3386_init_port(i);
 217                 pm3386_get_mac(i, nds[i]->dev_addr);
 218         }
 219
 220         ixp2400_msf_init(&enp2611_msf_parameters);
 221
 222         if (ixpdev_init(ports, nds, enp2611_set_port_admin_status)) {
 223                 for (i = 0; i < ports; i++)
 224                         if (nds[i])
 225                                 free_netdev(nds[i]);
 226                 return -EINVAL;
 227         }
 228
 229         init_timer(&link_check_timer);
 230         link_check_timer.function = enp2611_check_link_status;
 231         link_check_timer.expires = jiffies;
 232         add_timer(&link_check_timer);
 233
 234         return 0;
 235 }
 236
 237 static void __exit enp2611_cleanup_module(void)
 238 {
 239         int i;
 240
 241         del_timer_sync(&link_check_timer);
 242
 243         ixpdev_deinit();
 244         for (i = 0; i < 3; i++)
 245                 free_netdev(nds[i]);
 246 }
 247
 248 module_init(enp2611_init_module);
 249 module_exit(enp2611_cleanup_module);
 250 MODULE_LICENSE("GPL");