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