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linux/drivers/net/ixp2000/enp2611.c
Lennert Buytenhek 1ea739a5f9 The ixp2000 driver for the enp2611 was developed on a board with 
three gigabit ports, but some enp2611 models only have two ports
(and only one onboard PM3386.)  The current driver assumes there
are always three ports and so it doesn't work on the two-port
version of the board at all.

This patch adds a bit of logic to the enp2611 driver to limit the
number of ports to 2 if the second PM3386 isn't detected.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
2006-05-15 12:25:29 -07:00

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/*
* IXP2400 MSF network device driver for the Radisys ENP2611
* Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
* Dedicated to Marija Kulikova.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <asm/hardware/uengine.h>
#include <asm/mach-types.h>
#include <asm/io.h>
#include "ixpdev.h"
#include "caleb.h"
#include "ixp2400-msf.h"
#include "pm3386.h"
/***********************************************************************
* The Radisys ENP2611 is a PCI form factor board with three SFP GBIC
* slots, connected via two PMC/Sierra 3386s and an SPI-3 bridge FPGA
* to the IXP2400.
*
* +-------------+
* SFP GBIC #0 ---+ | +---------+
* | PM3386 #0 +-------+ |
* SFP GBIC #1 ---+ | | "Caleb" | +---------+
* +-------------+ | | | |
* | SPI-3 +---------+ IXP2400 |
* +-------------+ | bridge | | |
* SFP GBIC #2 ---+ | | FPGA | +---------+
* | PM3386 #1 +-------+ |
* | | +---------+
* +-------------+
* ^ ^ ^
* | 1.25Gbaud | 104MHz | 104MHz
* | SERDES ea. | SPI-3 ea. | SPI-3
*
***********************************************************************/
static struct ixp2400_msf_parameters enp2611_msf_parameters =
{
.rx_mode = IXP2400_RX_MODE_UTOPIA_POS |
IXP2400_RX_MODE_1x32 |
IXP2400_RX_MODE_MPHY |
IXP2400_RX_MODE_MPHY_32 |
IXP2400_RX_MODE_MPHY_POLLED_STATUS |
IXP2400_RX_MODE_MPHY_LEVEL3 |
IXP2400_RX_MODE_RBUF_SIZE_64,
.rxclk01_multiplier = IXP2400_PLL_MULTIPLIER_16,
.rx_poll_ports = 3,
.rx_channel_mode = {
IXP2400_PORT_RX_MODE_MASTER |
IXP2400_PORT_RX_MODE_POS_PHY |
IXP2400_PORT_RX_MODE_POS_PHY_L3 |
IXP2400_PORT_RX_MODE_ODD_PARITY |
IXP2400_PORT_RX_MODE_2_CYCLE_DECODE,
IXP2400_PORT_RX_MODE_MASTER |
IXP2400_PORT_RX_MODE_POS_PHY |
IXP2400_PORT_RX_MODE_POS_PHY_L3 |
IXP2400_PORT_RX_MODE_ODD_PARITY |
IXP2400_PORT_RX_MODE_2_CYCLE_DECODE,
IXP2400_PORT_RX_MODE_MASTER |
IXP2400_PORT_RX_MODE_POS_PHY |
IXP2400_PORT_RX_MODE_POS_PHY_L3 |
IXP2400_PORT_RX_MODE_ODD_PARITY |
IXP2400_PORT_RX_MODE_2_CYCLE_DECODE,
IXP2400_PORT_RX_MODE_MASTER |
IXP2400_PORT_RX_MODE_POS_PHY |
IXP2400_PORT_RX_MODE_POS_PHY_L3 |
IXP2400_PORT_RX_MODE_ODD_PARITY |
IXP2400_PORT_RX_MODE_2_CYCLE_DECODE
},
.tx_mode = IXP2400_TX_MODE_UTOPIA_POS |
IXP2400_TX_MODE_1x32 |
IXP2400_TX_MODE_MPHY |
IXP2400_TX_MODE_MPHY_32 |
IXP2400_TX_MODE_MPHY_POLLED_STATUS |
IXP2400_TX_MODE_MPHY_LEVEL3 |
IXP2400_TX_MODE_TBUF_SIZE_64,
.txclk01_multiplier = IXP2400_PLL_MULTIPLIER_16,
.tx_poll_ports = 3,
.tx_channel_mode = {
IXP2400_PORT_TX_MODE_MASTER |
IXP2400_PORT_TX_MODE_POS_PHY |
IXP2400_PORT_TX_MODE_ODD_PARITY |
IXP2400_PORT_TX_MODE_2_CYCLE_DECODE,
IXP2400_PORT_TX_MODE_MASTER |
IXP2400_PORT_TX_MODE_POS_PHY |
IXP2400_PORT_TX_MODE_ODD_PARITY |
IXP2400_PORT_TX_MODE_2_CYCLE_DECODE,
IXP2400_PORT_TX_MODE_MASTER |
IXP2400_PORT_TX_MODE_POS_PHY |
IXP2400_PORT_TX_MODE_ODD_PARITY |
IXP2400_PORT_TX_MODE_2_CYCLE_DECODE,
IXP2400_PORT_TX_MODE_MASTER |
IXP2400_PORT_TX_MODE_POS_PHY |
IXP2400_PORT_TX_MODE_ODD_PARITY |
IXP2400_PORT_TX_MODE_2_CYCLE_DECODE
}
};
struct enp2611_ixpdev_priv
{
struct ixpdev_priv ixpdev_priv;
struct net_device_stats stats;
};
static struct net_device *nds[3];
static struct timer_list link_check_timer;
static struct net_device_stats *enp2611_get_stats(struct net_device *dev)
{
struct enp2611_ixpdev_priv *ip = netdev_priv(dev);
pm3386_get_stats(ip->ixpdev_priv.channel, &(ip->stats));
return &(ip->stats);
}
/* @@@ Poll the SFP moddef0 line too. */
/* @@@ Try to use the pm3386 DOOL interrupt as well. */
static void enp2611_check_link_status(unsigned long __dummy)
{
int i;
for (i = 0; i < 3; i++) {
struct net_device *dev;
int status;
dev = nds[i];
if (dev == NULL)
continue;
status = pm3386_is_link_up(i);
if (status && !netif_carrier_ok(dev)) {
/* @@@ Should report autonegotiation status. */
printk(KERN_INFO "%s: NIC Link is Up\n", dev->name);
pm3386_enable_tx(i);
caleb_enable_tx(i);
netif_carrier_on(dev);
} else if (!status && netif_carrier_ok(dev)) {
printk(KERN_INFO "%s: NIC Link is Down\n", dev->name);
netif_carrier_off(dev);
caleb_disable_tx(i);
pm3386_disable_tx(i);
}
}
link_check_timer.expires = jiffies + HZ / 10;
add_timer(&link_check_timer);
}
static void enp2611_set_port_admin_status(int port, int up)
{
if (up) {
caleb_enable_rx(port);
pm3386_set_carrier(port, 1);
pm3386_enable_rx(port);
} else {
caleb_disable_tx(port);
pm3386_disable_tx(port);
/* @@@ Flush out pending packets. */
pm3386_set_carrier(port, 0);
pm3386_disable_rx(port);
caleb_disable_rx(port);
}
}
static int __init enp2611_init_module(void)
{
int ports;
int i;
if (!machine_is_enp2611())
return -ENODEV;
caleb_reset();
pm3386_reset();
ports = pm3386_port_count();
for (i = 0; i < ports; i++) {
nds[i] = ixpdev_alloc(i, sizeof(struct enp2611_ixpdev_priv));
if (nds[i] == NULL) {
while (--i >= 0)
free_netdev(nds[i]);
return -ENOMEM;
}
SET_MODULE_OWNER(nds[i]);
nds[i]->get_stats = enp2611_get_stats;
pm3386_init_port(i);
pm3386_get_mac(i, nds[i]->dev_addr);
}
ixp2400_msf_init(&enp2611_msf_parameters);
if (ixpdev_init(ports, nds, enp2611_set_port_admin_status)) {
for (i = 0; i < ports; i++)
if (nds[i])
free_netdev(nds[i]);
return -EINVAL;
}
init_timer(&link_check_timer);
link_check_timer.function = enp2611_check_link_status;
link_check_timer.expires = jiffies;
add_timer(&link_check_timer);
return 0;
}
static void __exit enp2611_cleanup_module(void)
{
int i;
del_timer_sync(&link_check_timer);
ixpdev_deinit();
for (i = 0; i < 3; i++)
free_netdev(nds[i]);
}
module_init(enp2611_init_module);
module_exit(enp2611_cleanup_module);
MODULE_LICENSE("GPL");
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