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1750 lines
46 KiB
C
1750 lines
46 KiB
C
/* Intel EtherExpress 16 device driver for Linux
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*
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* Written by John Sullivan, 1995
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* based on original code by Donald Becker, with changes by
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* Alan Cox and Pauline Middelink.
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*
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* Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
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*
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* Many modifications, and currently maintained, by
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* Philip Blundell <philb@gnu.org>
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* Added the Compaq LTE Alan Cox <alan@redhat.com>
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* Added MCA support Adam Fritzler <mid@auk.cx>
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*
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* Note - this driver is experimental still - it has problems on faster
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* machines. Someone needs to sit down and go through it line by line with
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* a databook...
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*/
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/* The EtherExpress 16 is a fairly simple card, based on a shared-memory
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* design using the i82586 Ethernet coprocessor. It bears no relationship,
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* as far as I know, to the similarly-named "EtherExpress Pro" range.
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*
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* Historically, Linux support for these cards has been very bad. However,
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* things seem to be getting better slowly.
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*/
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/* If your card is confused about what sort of interface it has (eg it
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* persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
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* or 'SOFTSET /LISA' from DOS seems to help.
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*/
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/* Here's the scoop on memory mapping.
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*
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* There are three ways to access EtherExpress card memory: either using the
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* shared-memory mapping, or using PIO through the dataport, or using PIO
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* through the "shadow memory" ports.
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*
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* The shadow memory system works by having the card map some of its memory
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* as follows:
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*
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* (the low five bits of the SMPTR are ignored)
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*
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* base+0x4000..400f memory at SMPTR+0..15
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* base+0x8000..800f memory at SMPTR+16..31
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* base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently)
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* base+0xc008..c00f memory at 0x0008..0x000f
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*
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* This last set (the one at c008) is particularly handy because the SCB
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* lives at 0x0008. So that set of ports gives us easy random access to data
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* in the SCB without having to mess around setting up pointers and the like.
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* We always use this method to access the SCB (via the scb_xx() functions).
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*
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* Dataport access works by aiming the appropriate (read or write) pointer
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* at the first address you're interested in, and then reading or writing from
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* the dataport. The pointers auto-increment after each transfer. We use
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* this for data transfer.
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*
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* We don't use the shared-memory system because it allegedly doesn't work on
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* all cards, and because it's a bit more prone to go wrong (it's one more
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* thing to configure...).
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*/
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/* Known bugs:
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*
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* - The card seems to want to give us two interrupts every time something
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* happens, where just one would be better.
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*/
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/*
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*
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* Note by Zoltan Szilagyi 10-12-96:
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*
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* I've succeeded in eliminating the "CU wedged" messages, and hence the
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* lockups, which were only occurring with cards running in 8-bit mode ("force
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* 8-bit operation" in Intel's SoftSet utility). This version of the driver
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* sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
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* CU before submitting a packet for transmission, and then restarts it as soon
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* as the process of handing the packet is complete. This is definitely an
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* unnecessary slowdown if the card is running in 16-bit mode; therefore one
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* should detect 16-bit vs 8-bit mode from the EEPROM settings and act
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* accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
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* ftp's, which is significantly better than I get in DOS, so the overhead of
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* stopping and restarting the CU with each transmit is not prohibitive in
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* practice.
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*
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* Update by David Woodhouse 11/5/99:
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*
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* I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
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* I assume that this is because 16-bit accesses are actually handled as two
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* 8-bit accesses.
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*/
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#ifdef __alpha__
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#define LOCKUP16 1
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#endif
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#ifndef LOCKUP16
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#define LOCKUP16 0
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#endif
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/string.h>
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#include <linux/in.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/mca-legacy.h>
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#include <linux/spinlock.h>
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#include <linux/bitops.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#ifndef NET_DEBUG
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#define NET_DEBUG 4
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#endif
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#include "eexpress.h"
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#define EEXP_IO_EXTENT 16
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/*
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* Private data declarations
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*/
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struct net_local
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{
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struct net_device_stats stats;
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unsigned long last_tx; /* jiffies when last transmit started */
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unsigned long init_time; /* jiffies when eexp_hw_init586 called */
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unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
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unsigned short rx_last; /* last rx buf */
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unsigned short rx_ptr; /* first rx buf to look at */
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unsigned short tx_head; /* next free tx buf */
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unsigned short tx_reap; /* first in-use tx buf */
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unsigned short tx_tail; /* previous tx buf to tx_head */
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unsigned short tx_link; /* last known-executing tx buf */
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unsigned short last_tx_restart; /* set to tx_link when we
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restart the CU */
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unsigned char started;
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unsigned short rx_buf_start;
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unsigned short rx_buf_end;
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unsigned short num_tx_bufs;
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unsigned short num_rx_bufs;
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unsigned char width; /* 0 for 16bit, 1 for 8bit */
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unsigned char was_promisc;
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unsigned char old_mc_count;
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spinlock_t lock;
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};
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/* This is the code and data that is downloaded to the EtherExpress card's
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* memory at boot time.
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*/
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static unsigned short start_code[] = {
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/* 0x0000 */
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0x0001, /* ISCP: busy - cleared after reset */
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0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */
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0x0000,0x0000, /* SCB: status, commands */
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0x0000,0x0000, /* links to first command block,
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first receive descriptor */
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0x0000,0x0000, /* CRC error, alignment error counts */
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0x0000,0x0000, /* out of resources, overrun error counts */
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0x0000,0x0000, /* pad */
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0x0000,0x0000,
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/* 0x20 -- start of 82586 CU program */
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#define CONF_LINK 0x20
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0x0000,Cmd_Config,
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0x0032, /* link to next command */
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0x080c, /* 12 bytes follow : fifo threshold=8 */
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0x2e40, /* don't rx bad frames
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* SRDY/ARDY => ext. sync. : preamble len=8
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* take addresses from data buffers
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* 6 bytes/address
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*/
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0x6000, /* default backoff method & priority
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* interframe spacing = 0x60 */
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0xf200, /* slot time=0x200
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* max collision retry = 0xf */
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#define CONF_PROMISC 0x2e
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0x0000, /* no HDLC : normal CRC : enable broadcast
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* disable promiscuous/multicast modes */
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0x003c, /* minimum frame length = 60 octets) */
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0x0000,Cmd_SetAddr,
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0x003e, /* link to next command */
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#define CONF_HWADDR 0x38
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0x0000,0x0000,0x0000, /* hardware address placed here */
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0x0000,Cmd_MCast,
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0x0076, /* link to next command */
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#define CONF_NR_MULTICAST 0x44
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0x0000, /* number of multicast addresses */
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#define CONF_MULTICAST 0x46
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0x0000, 0x0000, 0x0000, /* some addresses */
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0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000,
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#define CONF_DIAG_RESULT 0x76
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0x0000, Cmd_Diag,
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0x007c, /* link to next command */
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0x0000,Cmd_TDR|Cmd_INT,
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0x0084,
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#define CONF_TDR_RESULT 0x82
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0x0000,
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0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
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0x0084 /* dummy link */
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};
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/* maps irq number to EtherExpress magic value */
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static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
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#ifdef CONFIG_MCA_LEGACY
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/* mapping of the first four bits of the second POS register */
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static unsigned short mca_iomap[] = {
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0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
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0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
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};
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/* bits 5-7 of the second POS register */
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static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
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#endif
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/*
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* Prototypes for Linux interface
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*/
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static int eexp_open(struct net_device *dev);
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static int eexp_close(struct net_device *dev);
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static void eexp_timeout(struct net_device *dev);
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static struct net_device_stats *eexp_stats(struct net_device *dev);
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static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
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static irqreturn_t eexp_irq(int irq, void *dev_addr, struct pt_regs *regs);
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static void eexp_set_multicast(struct net_device *dev);
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/*
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* Prototypes for hardware access functions
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*/
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static void eexp_hw_rx_pio(struct net_device *dev);
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static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
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unsigned short len);
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static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
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static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
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unsigned char location);
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static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
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static void eexp_hw_txrestart(struct net_device *dev);
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static void eexp_hw_txinit (struct net_device *dev);
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static void eexp_hw_rxinit (struct net_device *dev);
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static void eexp_hw_init586 (struct net_device *dev);
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static void eexp_setup_filter (struct net_device *dev);
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static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
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enum eexp_iftype {AUI=0, BNC=1, TPE=2};
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#define STARTED_RU 2
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#define STARTED_CU 1
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/*
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* Primitive hardware access functions.
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*/
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static inline unsigned short scb_status(struct net_device *dev)
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{
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return inw(dev->base_addr + 0xc008);
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}
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static inline unsigned short scb_rdcmd(struct net_device *dev)
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{
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return inw(dev->base_addr + 0xc00a);
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}
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static inline void scb_command(struct net_device *dev, unsigned short cmd)
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{
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outw(cmd, dev->base_addr + 0xc00a);
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}
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static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
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{
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outw(val, dev->base_addr + 0xc00c);
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}
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static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
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{
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outw(val, dev->base_addr + 0xc00e);
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}
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static inline void set_loopback(struct net_device *dev)
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{
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outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
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}
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static inline void clear_loopback(struct net_device *dev)
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{
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outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
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}
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static inline unsigned short int SHADOW(short int addr)
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{
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addr &= 0x1f;
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if (addr > 0xf) addr += 0x3ff0;
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return addr + 0x4000;
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}
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/*
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* Linux interface
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*/
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/*
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* checks for presence of EtherExpress card
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*/
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static int __init do_express_probe(struct net_device *dev)
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{
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unsigned short *port;
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static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
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unsigned short ioaddr = dev->base_addr;
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int dev_irq = dev->irq;
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int err;
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SET_MODULE_OWNER(dev);
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dev->if_port = 0xff; /* not set */
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#ifdef CONFIG_MCA_LEGACY
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if (MCA_bus) {
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int slot = 0;
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/*
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* Only find one card at a time. Subsequent calls
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* will find others, however, proper multicard MCA
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* probing and setup can't be done with the
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* old-style Space.c init routines. -- ASF
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*/
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while (slot != MCA_NOTFOUND) {
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int pos0, pos1;
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slot = mca_find_unused_adapter(0x628B, slot);
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if (slot == MCA_NOTFOUND)
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break;
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pos0 = mca_read_stored_pos(slot, 2);
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pos1 = mca_read_stored_pos(slot, 3);
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ioaddr = mca_iomap[pos1&0xf];
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dev->irq = mca_irqmap[(pos1>>4)&0x7];
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/*
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* XXX: Transciever selection is done
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* differently on the MCA version.
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* How to get it to select something
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* other than external/AUI is currently
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* unknown. This code is just for looks. -- ASF
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*/
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if ((pos0 & 0x7) == 0x1)
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dev->if_port = AUI;
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else if ((pos0 & 0x7) == 0x5) {
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if (pos1 & 0x80)
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dev->if_port = BNC;
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else
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dev->if_port = TPE;
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}
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mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
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mca_set_adapter_procfn(slot, NULL, dev);
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mca_mark_as_used(slot);
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break;
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}
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}
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#endif
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if (ioaddr&0xfe00) {
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if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
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return -EBUSY;
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err = eexp_hw_probe(dev,ioaddr);
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release_region(ioaddr, EEXP_IO_EXTENT);
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return err;
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} else if (ioaddr)
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return -ENXIO;
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for (port=&ports[0] ; *port ; port++ )
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{
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unsigned short sum = 0;
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int i;
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if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
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continue;
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for ( i=0 ; i<4 ; i++ )
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{
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unsigned short t;
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t = inb(*port + ID_PORT);
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sum |= (t>>4) << ((t & 0x03)<<2);
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}
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if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
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release_region(*port, EEXP_IO_EXTENT);
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return 0;
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}
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release_region(*port, EEXP_IO_EXTENT);
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dev->irq = dev_irq;
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}
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return -ENODEV;
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}
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|
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#ifndef MODULE
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struct net_device * __init express_probe(int unit)
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{
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struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
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int err;
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if (!dev)
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return ERR_PTR(-ENOMEM);
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sprintf(dev->name, "eth%d", unit);
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netdev_boot_setup_check(dev);
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err = do_express_probe(dev);
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if (!err)
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return dev;
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free_netdev(dev);
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return ERR_PTR(err);
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}
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#endif
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/*
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* open and initialize the adapter, ready for use
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*/
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static int eexp_open(struct net_device *dev)
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{
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int ret;
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unsigned short ioaddr = dev->base_addr;
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struct net_local *lp = netdev_priv(dev);
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#if NET_DEBUG > 6
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printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
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#endif
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if (!dev->irq || !irqrmap[dev->irq])
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return -ENXIO;
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ret = request_irq(dev->irq,&eexp_irq,0,dev->name,dev);
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if (ret) return ret;
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if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
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printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
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, ioaddr);
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goto err_out1;
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}
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if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
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printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
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, ioaddr+0x4000);
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goto err_out2;
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}
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if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
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printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
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, ioaddr+0x8000);
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goto err_out3;
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}
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if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
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printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
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, ioaddr+0xc000);
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goto err_out4;
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}
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|
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if (lp->width) {
|
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printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
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outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
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}
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|
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eexp_hw_init586(dev);
|
|
netif_start_queue(dev);
|
|
#if NET_DEBUG > 6
|
|
printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
|
|
#endif
|
|
return 0;
|
|
|
|
err_out4:
|
|
release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
|
|
err_out3:
|
|
release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
|
|
err_out2:
|
|
release_region(ioaddr, EEXP_IO_EXTENT);
|
|
err_out1:
|
|
free_irq(dev->irq, dev);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* close and disable the interface, leaving the 586 in reset.
|
|
*/
|
|
|
|
static int eexp_close(struct net_device *dev)
|
|
{
|
|
unsigned short ioaddr = dev->base_addr;
|
|
struct net_local *lp = netdev_priv(dev);
|
|
|
|
int irq = dev->irq;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
|
|
lp->started = 0;
|
|
scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
free_irq(irq,dev);
|
|
outb(i586_RST,ioaddr+EEPROM_Ctrl);
|
|
release_region(ioaddr, EEXP_IO_EXTENT);
|
|
release_region(ioaddr+0x4000, 16);
|
|
release_region(ioaddr+0x8000, 16);
|
|
release_region(ioaddr+0xc000, 16);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return interface stats
|
|
*/
|
|
|
|
static struct net_device_stats *eexp_stats(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
|
|
return &lp->stats;
|
|
}
|
|
|
|
/*
|
|
* This gets called when a higher level thinks we are broken. Check that
|
|
* nothing has become jammed in the CU.
|
|
*/
|
|
|
|
static void unstick_cu(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short ioaddr = dev->base_addr;
|
|
|
|
if (lp->started)
|
|
{
|
|
if ((jiffies - dev->trans_start)>50)
|
|
{
|
|
if (lp->tx_link==lp->last_tx_restart)
|
|
{
|
|
unsigned short boguscount=200,rsst;
|
|
printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
|
|
dev->name, scb_status(dev));
|
|
eexp_hw_txinit(dev);
|
|
lp->last_tx_restart = 0;
|
|
scb_wrcbl(dev, lp->tx_link);
|
|
scb_command(dev, SCB_CUstart);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
while (!SCB_complete(rsst=scb_status(dev)))
|
|
{
|
|
if (!--boguscount)
|
|
{
|
|
boguscount=200;
|
|
printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
|
|
dev->name,rsst);
|
|
scb_wrcbl(dev, lp->tx_link);
|
|
scb_command(dev, SCB_CUstart);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
}
|
|
}
|
|
netif_wake_queue(dev);
|
|
}
|
|
else
|
|
{
|
|
unsigned short status = scb_status(dev);
|
|
if (SCB_CUdead(status))
|
|
{
|
|
unsigned short txstatus = eexp_hw_lasttxstat(dev);
|
|
printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
|
|
dev->name, status, txstatus);
|
|
eexp_hw_txrestart(dev);
|
|
}
|
|
else
|
|
{
|
|
unsigned short txstatus = eexp_hw_lasttxstat(dev);
|
|
if (netif_queue_stopped(dev) && !txstatus)
|
|
{
|
|
printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
|
|
dev->name,status,txstatus);
|
|
eexp_hw_init586(dev);
|
|
netif_wake_queue(dev);
|
|
}
|
|
else
|
|
{
|
|
printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((jiffies-lp->init_time)>10)
|
|
{
|
|
unsigned short status = scb_status(dev);
|
|
printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
|
|
dev->name, status);
|
|
eexp_hw_init586(dev);
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void eexp_timeout(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
#ifdef CONFIG_SMP
|
|
unsigned long flags;
|
|
#endif
|
|
int status;
|
|
|
|
disable_irq(dev->irq);
|
|
|
|
/*
|
|
* Best would be to use synchronize_irq(); spin_lock() here
|
|
* lets make it work first..
|
|
*/
|
|
|
|
#ifdef CONFIG_SMP
|
|
spin_lock_irqsave(&lp->lock, flags);
|
|
#endif
|
|
|
|
status = scb_status(dev);
|
|
unstick_cu(dev);
|
|
printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
|
|
(SCB_complete(status)?"lost interrupt":
|
|
"board on fire"));
|
|
lp->stats.tx_errors++;
|
|
lp->last_tx = jiffies;
|
|
if (!SCB_complete(status)) {
|
|
scb_command(dev, SCB_CUabort);
|
|
outb(0,dev->base_addr+SIGNAL_CA);
|
|
}
|
|
netif_wake_queue(dev);
|
|
#ifdef CONFIG_SMP
|
|
spin_unlock_irqrestore(&lp->lock, flags);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Called to transmit a packet, or to allow us to right ourselves
|
|
* if the kernel thinks we've died.
|
|
*/
|
|
static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
short length = buf->len;
|
|
#ifdef CONFIG_SMP
|
|
unsigned long flags;
|
|
#endif
|
|
|
|
#if NET_DEBUG > 6
|
|
printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
|
|
#endif
|
|
|
|
if (buf->len < ETH_ZLEN) {
|
|
buf = skb_padto(buf, ETH_ZLEN);
|
|
if (buf == NULL)
|
|
return 0;
|
|
length = ETH_ZLEN;
|
|
}
|
|
|
|
disable_irq(dev->irq);
|
|
|
|
/*
|
|
* Best would be to use synchronize_irq(); spin_lock() here
|
|
* lets make it work first..
|
|
*/
|
|
|
|
#ifdef CONFIG_SMP
|
|
spin_lock_irqsave(&lp->lock, flags);
|
|
#endif
|
|
|
|
{
|
|
unsigned short *data = (unsigned short *)buf->data;
|
|
|
|
lp->stats.tx_bytes += length;
|
|
|
|
eexp_hw_tx_pio(dev,data,length);
|
|
}
|
|
dev_kfree_skb(buf);
|
|
#ifdef CONFIG_SMP
|
|
spin_unlock_irqrestore(&lp->lock, flags);
|
|
#endif
|
|
enable_irq(dev->irq);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Handle an EtherExpress interrupt
|
|
* If we've finished initializing, start the RU and CU up.
|
|
* If we've already started, reap tx buffers, handle any received packets,
|
|
* check to make sure we've not become wedged.
|
|
*/
|
|
|
|
/*
|
|
* Handle an EtherExpress interrupt
|
|
* If we've finished initializing, start the RU and CU up.
|
|
* If we've already started, reap tx buffers, handle any received packets,
|
|
* check to make sure we've not become wedged.
|
|
*/
|
|
|
|
static unsigned short eexp_start_irq(struct net_device *dev,
|
|
unsigned short status)
|
|
{
|
|
unsigned short ack_cmd = SCB_ack(status);
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short ioaddr = dev->base_addr;
|
|
if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
|
|
short diag_status, tdr_status;
|
|
while (SCB_CUstat(status)==2)
|
|
status = scb_status(dev);
|
|
#if NET_DEBUG > 4
|
|
printk("%s: CU went non-active (status %04x)\n",
|
|
dev->name, status);
|
|
#endif
|
|
|
|
outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
|
|
diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
|
|
if (diag_status & 1<<11) {
|
|
printk(KERN_WARNING "%s: 82586 failed self-test\n",
|
|
dev->name);
|
|
} else if (!(diag_status & 1<<13)) {
|
|
printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
|
|
}
|
|
|
|
outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
|
|
tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
|
|
if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
|
|
printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : "");
|
|
}
|
|
else if (tdr_status & TDR_XCVRPROBLEM) {
|
|
printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
|
|
}
|
|
else if (tdr_status & TDR_LINKOK) {
|
|
#if NET_DEBUG > 4
|
|
printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
|
|
#endif
|
|
} else {
|
|
printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
|
|
tdr_status);
|
|
}
|
|
|
|
lp->started |= STARTED_CU;
|
|
scb_wrcbl(dev, lp->tx_link);
|
|
/* if the RU isn't running, start it now */
|
|
if (!(lp->started & STARTED_RU)) {
|
|
ack_cmd |= SCB_RUstart;
|
|
scb_wrrfa(dev, lp->rx_buf_start);
|
|
lp->rx_ptr = lp->rx_buf_start;
|
|
lp->started |= STARTED_RU;
|
|
}
|
|
ack_cmd |= SCB_CUstart | 0x2000;
|
|
}
|
|
|
|
if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
|
|
lp->started|=STARTED_RU;
|
|
|
|
return ack_cmd;
|
|
}
|
|
|
|
static void eexp_cmd_clear(struct net_device *dev)
|
|
{
|
|
unsigned long int oldtime = jiffies;
|
|
while (scb_rdcmd(dev) && ((jiffies-oldtime)<10));
|
|
if (scb_rdcmd(dev)) {
|
|
printk("%s: command didn't clear\n", dev->name);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t eexp_irq(int irq, void *dev_info, struct pt_regs *regs)
|
|
{
|
|
struct net_device *dev = dev_info;
|
|
struct net_local *lp;
|
|
unsigned short ioaddr,status,ack_cmd;
|
|
unsigned short old_read_ptr, old_write_ptr;
|
|
|
|
if (dev==NULL)
|
|
{
|
|
printk(KERN_WARNING "eexpress: irq %d for unknown device\n",
|
|
irq);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
lp = netdev_priv(dev);
|
|
ioaddr = dev->base_addr;
|
|
|
|
spin_lock(&lp->lock);
|
|
|
|
old_read_ptr = inw(ioaddr+READ_PTR);
|
|
old_write_ptr = inw(ioaddr+WRITE_PTR);
|
|
|
|
outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
|
|
|
|
|
|
status = scb_status(dev);
|
|
|
|
#if NET_DEBUG > 4
|
|
printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
|
|
#endif
|
|
|
|
if (lp->started == (STARTED_CU | STARTED_RU)) {
|
|
|
|
do {
|
|
eexp_cmd_clear(dev);
|
|
|
|
ack_cmd = SCB_ack(status);
|
|
scb_command(dev, ack_cmd);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
|
|
eexp_cmd_clear(dev);
|
|
|
|
if (SCB_complete(status)) {
|
|
if (!eexp_hw_lasttxstat(dev)) {
|
|
printk("%s: tx interrupt but no status\n", dev->name);
|
|
}
|
|
}
|
|
|
|
if (SCB_rxdframe(status))
|
|
eexp_hw_rx_pio(dev);
|
|
|
|
status = scb_status(dev);
|
|
} while (status & 0xc000);
|
|
|
|
if (SCB_RUdead(status))
|
|
{
|
|
printk(KERN_WARNING "%s: RU stopped: status %04x\n",
|
|
dev->name,status);
|
|
#if 0
|
|
printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
|
|
outw(lp->cur_rfd, ioaddr+READ_PTR);
|
|
printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
|
|
outw(lp->cur_rfd+6, ioaddr+READ_PTR);
|
|
printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
|
|
outw(rbd, ioaddr+READ_PTR);
|
|
printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
|
|
outw(rbd+8, ioaddr+READ_PTR);
|
|
printk("[%04x]\n", inw(ioaddr+DATAPORT));
|
|
#endif
|
|
lp->stats.rx_errors++;
|
|
#if 1
|
|
eexp_hw_rxinit(dev);
|
|
#else
|
|
lp->cur_rfd = lp->first_rfd;
|
|
#endif
|
|
scb_wrrfa(dev, lp->rx_buf_start);
|
|
scb_command(dev, SCB_RUstart);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
}
|
|
} else {
|
|
if (status & 0x8000)
|
|
ack_cmd = eexp_start_irq(dev, status);
|
|
else
|
|
ack_cmd = SCB_ack(status);
|
|
scb_command(dev, ack_cmd);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
}
|
|
|
|
eexp_cmd_clear(dev);
|
|
|
|
outb(SIRQ_en|irqrmap[irq],ioaddr+SET_IRQ);
|
|
|
|
#if NET_DEBUG > 6
|
|
printk("%s: leaving eexp_irq()\n", dev->name);
|
|
#endif
|
|
outw(old_read_ptr, ioaddr+READ_PTR);
|
|
outw(old_write_ptr, ioaddr+WRITE_PTR);
|
|
|
|
spin_unlock(&lp->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* Hardware access functions
|
|
*/
|
|
|
|
/*
|
|
* Set the cable type to use.
|
|
*/
|
|
|
|
static void eexp_hw_set_interface(struct net_device *dev)
|
|
{
|
|
unsigned char oldval = inb(dev->base_addr + 0x300e);
|
|
oldval &= ~0x82;
|
|
switch (dev->if_port) {
|
|
case TPE:
|
|
oldval |= 0x2;
|
|
case BNC:
|
|
oldval |= 0x80;
|
|
break;
|
|
}
|
|
outb(oldval, dev->base_addr+0x300e);
|
|
mdelay(20);
|
|
}
|
|
|
|
/*
|
|
* Check all the receive buffers, and hand any received packets
|
|
* to the upper levels. Basic sanity check on each frame
|
|
* descriptor, though we don't bother trying to fix broken ones.
|
|
*/
|
|
|
|
static void eexp_hw_rx_pio(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short rx_block = lp->rx_ptr;
|
|
unsigned short boguscount = lp->num_rx_bufs;
|
|
unsigned short ioaddr = dev->base_addr;
|
|
unsigned short status;
|
|
|
|
#if NET_DEBUG > 6
|
|
printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
|
|
#endif
|
|
|
|
do {
|
|
unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
|
|
|
|
outw(rx_block, ioaddr + READ_PTR);
|
|
status = inw(ioaddr + DATAPORT);
|
|
|
|
if (FD_Done(status))
|
|
{
|
|
rfd_cmd = inw(ioaddr + DATAPORT);
|
|
rx_next = inw(ioaddr + DATAPORT);
|
|
pbuf = inw(ioaddr + DATAPORT);
|
|
|
|
outw(pbuf, ioaddr + READ_PTR);
|
|
pkt_len = inw(ioaddr + DATAPORT);
|
|
|
|
if (rfd_cmd!=0x0000)
|
|
{
|
|
printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
|
|
dev->name, rfd_cmd);
|
|
continue;
|
|
}
|
|
else if (pbuf!=rx_block+0x16)
|
|
{
|
|
printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
|
|
dev->name, rx_block+0x16, pbuf);
|
|
continue;
|
|
}
|
|
else if ((pkt_len & 0xc000)!=0xc000)
|
|
{
|
|
printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
|
|
dev->name, pkt_len & 0xc000);
|
|
continue;
|
|
}
|
|
else if (!FD_OK(status))
|
|
{
|
|
lp->stats.rx_errors++;
|
|
if (FD_CRC(status))
|
|
lp->stats.rx_crc_errors++;
|
|
if (FD_Align(status))
|
|
lp->stats.rx_frame_errors++;
|
|
if (FD_Resrc(status))
|
|
lp->stats.rx_fifo_errors++;
|
|
if (FD_DMA(status))
|
|
lp->stats.rx_over_errors++;
|
|
if (FD_Short(status))
|
|
lp->stats.rx_length_errors++;
|
|
}
|
|
else
|
|
{
|
|
struct sk_buff *skb;
|
|
pkt_len &= 0x3fff;
|
|
skb = dev_alloc_skb(pkt_len+16);
|
|
if (skb == NULL)
|
|
{
|
|
printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
|
|
lp->stats.rx_dropped++;
|
|
break;
|
|
}
|
|
skb->dev = dev;
|
|
skb_reserve(skb, 2);
|
|
outw(pbuf+10, ioaddr+READ_PTR);
|
|
insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
|
|
skb->protocol = eth_type_trans(skb,dev);
|
|
netif_rx(skb);
|
|
dev->last_rx = jiffies;
|
|
lp->stats.rx_packets++;
|
|
lp->stats.rx_bytes += pkt_len;
|
|
}
|
|
outw(rx_block, ioaddr+WRITE_PTR);
|
|
outw(0, ioaddr+DATAPORT);
|
|
outw(0, ioaddr+DATAPORT);
|
|
rx_block = rx_next;
|
|
}
|
|
} while (FD_Done(status) && boguscount--);
|
|
lp->rx_ptr = rx_block;
|
|
}
|
|
|
|
/*
|
|
* Hand a packet to the card for transmission
|
|
* If we get here, we MUST have already checked
|
|
* to make sure there is room in the transmit
|
|
* buffer region.
|
|
*/
|
|
|
|
static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
|
|
unsigned short len)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short ioaddr = dev->base_addr;
|
|
|
|
if (LOCKUP16 || lp->width) {
|
|
/* Stop the CU so that there is no chance that it
|
|
jumps off to a bogus address while we are writing the
|
|
pointer to the next transmit packet in 8-bit mode --
|
|
this eliminates the "CU wedged" errors in 8-bit mode.
|
|
(Zoltan Szilagyi 10-12-96) */
|
|
scb_command(dev, SCB_CUsuspend);
|
|
outw(0xFFFF, ioaddr+SIGNAL_CA);
|
|
}
|
|
|
|
outw(lp->tx_head, ioaddr + WRITE_PTR);
|
|
|
|
outw(0x0000, ioaddr + DATAPORT);
|
|
outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
|
|
outw(lp->tx_head+0x08, ioaddr + DATAPORT);
|
|
outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
|
|
|
|
outw(0x0000, ioaddr + DATAPORT);
|
|
outw(0x0000, ioaddr + DATAPORT);
|
|
outw(lp->tx_head+0x08, ioaddr + DATAPORT);
|
|
|
|
outw(0x8000|len, ioaddr + DATAPORT);
|
|
outw(-1, ioaddr + DATAPORT);
|
|
outw(lp->tx_head+0x16, ioaddr + DATAPORT);
|
|
outw(0, ioaddr + DATAPORT);
|
|
|
|
outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
|
|
|
|
outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
|
|
outw(lp->tx_head, ioaddr + DATAPORT);
|
|
|
|
dev->trans_start = jiffies;
|
|
lp->tx_tail = lp->tx_head;
|
|
if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
|
|
lp->tx_head = TX_BUF_START;
|
|
else
|
|
lp->tx_head += TX_BUF_SIZE;
|
|
if (lp->tx_head != lp->tx_reap)
|
|
netif_wake_queue(dev);
|
|
|
|
if (LOCKUP16 || lp->width) {
|
|
/* Restart the CU so that the packet can actually
|
|
be transmitted. (Zoltan Szilagyi 10-12-96) */
|
|
scb_command(dev, SCB_CUresume);
|
|
outw(0xFFFF, ioaddr+SIGNAL_CA);
|
|
}
|
|
|
|
lp->stats.tx_packets++;
|
|
lp->last_tx = jiffies;
|
|
}
|
|
|
|
/*
|
|
* Sanity check the suspected EtherExpress card
|
|
* Read hardware address, reset card, size memory and initialize buffer
|
|
* memory pointers. These are held in dev->priv, in case someone has more
|
|
* than one card in a machine.
|
|
*/
|
|
|
|
static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
|
|
{
|
|
unsigned short hw_addr[3];
|
|
unsigned char buswidth;
|
|
unsigned int memory_size;
|
|
int i;
|
|
unsigned short xsum = 0;
|
|
struct net_local *lp = netdev_priv(dev);
|
|
|
|
printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
|
|
|
|
outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
|
|
outb(0, ioaddr+EEPROM_Ctrl);
|
|
udelay(500);
|
|
outb(i586_RST, ioaddr+EEPROM_Ctrl);
|
|
|
|
hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
|
|
hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
|
|
hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
|
|
|
|
/* Standard Address or Compaq LTE Address */
|
|
if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
|
|
(hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
|
|
{
|
|
printk(" rejected: invalid address %04x%04x%04x\n",
|
|
hw_addr[2],hw_addr[1],hw_addr[0]);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Calculate the EEPROM checksum. Carry on anyway if it's bad,
|
|
* though.
|
|
*/
|
|
for (i = 0; i < 64; i++)
|
|
xsum += eexp_hw_readeeprom(ioaddr, i);
|
|
if (xsum != 0xbaba)
|
|
printk(" (bad EEPROM xsum 0x%02x)", xsum);
|
|
|
|
dev->base_addr = ioaddr;
|
|
for ( i=0 ; i<6 ; i++ )
|
|
dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
|
|
|
|
{
|
|
static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
|
|
unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
|
|
|
|
/* Use the IRQ from EEPROM if none was given */
|
|
if (!dev->irq)
|
|
dev->irq = irqmap[setupval>>13];
|
|
|
|
if (dev->if_port == 0xff) {
|
|
dev->if_port = !(setupval & 0x1000) ? AUI :
|
|
eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
|
|
}
|
|
|
|
buswidth = !((setupval & 0x400) >> 10);
|
|
}
|
|
|
|
memset(lp, 0, sizeof(struct net_local));
|
|
spin_lock_init(&lp->lock);
|
|
|
|
printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
|
|
eexp_ifmap[dev->if_port], buswidth?8:16);
|
|
|
|
if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
|
|
return -EBUSY;
|
|
|
|
eexp_hw_set_interface(dev);
|
|
|
|
release_region(dev->base_addr + 0x300e, 1);
|
|
|
|
/* Find out how much RAM we have on the card */
|
|
outw(0, dev->base_addr + WRITE_PTR);
|
|
for (i = 0; i < 32768; i++)
|
|
outw(0, dev->base_addr + DATAPORT);
|
|
|
|
for (memory_size = 0; memory_size < 64; memory_size++)
|
|
{
|
|
outw(memory_size<<10, dev->base_addr + READ_PTR);
|
|
if (inw(dev->base_addr+DATAPORT))
|
|
break;
|
|
outw(memory_size<<10, dev->base_addr + WRITE_PTR);
|
|
outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
|
|
outw(memory_size<<10, dev->base_addr + READ_PTR);
|
|
if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
|
|
break;
|
|
}
|
|
|
|
/* Sort out the number of buffers. We may have 16, 32, 48 or 64k
|
|
* of RAM to play with.
|
|
*/
|
|
lp->num_tx_bufs = 4;
|
|
lp->rx_buf_end = 0x3ff6;
|
|
switch (memory_size)
|
|
{
|
|
case 64:
|
|
lp->rx_buf_end += 0x4000;
|
|
case 48:
|
|
lp->num_tx_bufs += 4;
|
|
lp->rx_buf_end += 0x4000;
|
|
case 32:
|
|
lp->rx_buf_end += 0x4000;
|
|
case 16:
|
|
printk(", %dk RAM)\n", memory_size);
|
|
break;
|
|
default:
|
|
printk(") bad memory size (%dk).\n", memory_size);
|
|
return -ENODEV;
|
|
break;
|
|
}
|
|
|
|
lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
|
|
lp->width = buswidth;
|
|
|
|
dev->open = eexp_open;
|
|
dev->stop = eexp_close;
|
|
dev->hard_start_xmit = eexp_xmit;
|
|
dev->get_stats = eexp_stats;
|
|
dev->set_multicast_list = &eexp_set_multicast;
|
|
dev->tx_timeout = eexp_timeout;
|
|
dev->watchdog_timeo = 2*HZ;
|
|
|
|
return register_netdev(dev);
|
|
}
|
|
|
|
/*
|
|
* Read a word from the EtherExpress on-board serial EEPROM.
|
|
* The EEPROM contains 64 words of 16 bits.
|
|
*/
|
|
static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
|
|
unsigned char location)
|
|
{
|
|
unsigned short cmd = 0x180|(location&0x7f);
|
|
unsigned short rval = 0,wval = EC_CS|i586_RST;
|
|
int i;
|
|
|
|
outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
|
|
for (i=0x100 ; i ; i>>=1 )
|
|
{
|
|
if (cmd&i)
|
|
wval |= EC_Wr;
|
|
else
|
|
wval &= ~EC_Wr;
|
|
|
|
outb(wval,ioaddr+EEPROM_Ctrl);
|
|
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
|
|
eeprom_delay();
|
|
outb(wval,ioaddr+EEPROM_Ctrl);
|
|
eeprom_delay();
|
|
}
|
|
wval &= ~EC_Wr;
|
|
outb(wval,ioaddr+EEPROM_Ctrl);
|
|
for (i=0x8000 ; i ; i>>=1 )
|
|
{
|
|
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
|
|
eeprom_delay();
|
|
if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
|
|
rval |= i;
|
|
outb(wval,ioaddr+EEPROM_Ctrl);
|
|
eeprom_delay();
|
|
}
|
|
wval &= ~EC_CS;
|
|
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
|
|
eeprom_delay();
|
|
outb(wval,ioaddr+EEPROM_Ctrl);
|
|
eeprom_delay();
|
|
return rval;
|
|
}
|
|
|
|
/*
|
|
* Reap tx buffers and return last transmit status.
|
|
* if ==0 then either:
|
|
* a) we're not transmitting anything, so why are we here?
|
|
* b) we've died.
|
|
* otherwise, Stat_Busy(return) means we've still got some packets
|
|
* to transmit, Stat_Done(return) means our buffers should be empty
|
|
* again
|
|
*/
|
|
|
|
static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short tx_block = lp->tx_reap;
|
|
unsigned short status;
|
|
|
|
if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
|
|
return 0x0000;
|
|
|
|
do
|
|
{
|
|
outw(tx_block & ~31, dev->base_addr + SM_PTR);
|
|
status = inw(dev->base_addr + SHADOW(tx_block));
|
|
if (!Stat_Done(status))
|
|
{
|
|
lp->tx_link = tx_block;
|
|
return status;
|
|
}
|
|
else
|
|
{
|
|
lp->last_tx_restart = 0;
|
|
lp->stats.collisions += Stat_NoColl(status);
|
|
if (!Stat_OK(status))
|
|
{
|
|
char *whatsup = NULL;
|
|
lp->stats.tx_errors++;
|
|
if (Stat_Abort(status))
|
|
lp->stats.tx_aborted_errors++;
|
|
if (Stat_TNoCar(status)) {
|
|
whatsup = "aborted, no carrier";
|
|
lp->stats.tx_carrier_errors++;
|
|
}
|
|
if (Stat_TNoCTS(status)) {
|
|
whatsup = "aborted, lost CTS";
|
|
lp->stats.tx_carrier_errors++;
|
|
}
|
|
if (Stat_TNoDMA(status)) {
|
|
whatsup = "FIFO underran";
|
|
lp->stats.tx_fifo_errors++;
|
|
}
|
|
if (Stat_TXColl(status)) {
|
|
whatsup = "aborted, too many collisions";
|
|
lp->stats.tx_aborted_errors++;
|
|
}
|
|
if (whatsup)
|
|
printk(KERN_INFO "%s: transmit %s\n",
|
|
dev->name, whatsup);
|
|
}
|
|
else
|
|
lp->stats.tx_packets++;
|
|
}
|
|
if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
|
|
lp->tx_reap = tx_block = TX_BUF_START;
|
|
else
|
|
lp->tx_reap = tx_block += TX_BUF_SIZE;
|
|
netif_wake_queue(dev);
|
|
}
|
|
while (lp->tx_reap != lp->tx_head);
|
|
|
|
lp->tx_link = lp->tx_tail + 0x08;
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* This should never happen. It is called when some higher routine detects
|
|
* that the CU has stopped, to try to restart it from the last packet we knew
|
|
* we were working on, or the idle loop if we had finished for the time.
|
|
*/
|
|
|
|
static void eexp_hw_txrestart(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short ioaddr = dev->base_addr;
|
|
|
|
lp->last_tx_restart = lp->tx_link;
|
|
scb_wrcbl(dev, lp->tx_link);
|
|
scb_command(dev, SCB_CUstart);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
|
|
{
|
|
unsigned short boguscount=50,failcount=5;
|
|
while (!scb_status(dev))
|
|
{
|
|
if (!--boguscount)
|
|
{
|
|
if (--failcount)
|
|
{
|
|
printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
|
|
scb_wrcbl(dev, lp->tx_link);
|
|
scb_command(dev, SCB_CUstart);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
boguscount = 100;
|
|
}
|
|
else
|
|
{
|
|
printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
|
|
eexp_hw_init586(dev);
|
|
netif_wake_queue(dev);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Writes down the list of transmit buffers into card memory. Each
|
|
* entry consists of an 82586 transmit command, followed by a jump
|
|
* pointing to itself. When we want to transmit a packet, we write
|
|
* the data into the appropriate transmit buffer and then modify the
|
|
* preceding jump to point at the new transmit command. This means that
|
|
* the 586 command unit is continuously active.
|
|
*/
|
|
|
|
static void eexp_hw_txinit(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short tx_block = TX_BUF_START;
|
|
unsigned short curtbuf;
|
|
unsigned short ioaddr = dev->base_addr;
|
|
|
|
for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
|
|
{
|
|
outw(tx_block, ioaddr + WRITE_PTR);
|
|
|
|
outw(0x0000, ioaddr + DATAPORT);
|
|
outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
|
|
outw(tx_block+0x08, ioaddr + DATAPORT);
|
|
outw(tx_block+0x0e, ioaddr + DATAPORT);
|
|
|
|
outw(0x0000, ioaddr + DATAPORT);
|
|
outw(0x0000, ioaddr + DATAPORT);
|
|
outw(tx_block+0x08, ioaddr + DATAPORT);
|
|
|
|
outw(0x8000, ioaddr + DATAPORT);
|
|
outw(-1, ioaddr + DATAPORT);
|
|
outw(tx_block+0x16, ioaddr + DATAPORT);
|
|
outw(0x0000, ioaddr + DATAPORT);
|
|
|
|
tx_block += TX_BUF_SIZE;
|
|
}
|
|
lp->tx_head = TX_BUF_START;
|
|
lp->tx_reap = TX_BUF_START;
|
|
lp->tx_tail = tx_block - TX_BUF_SIZE;
|
|
lp->tx_link = lp->tx_tail + 0x08;
|
|
lp->rx_buf_start = tx_block;
|
|
|
|
}
|
|
|
|
/*
|
|
* Write the circular list of receive buffer descriptors to card memory.
|
|
* The end of the list isn't marked, which means that the 82586 receive
|
|
* unit will loop until buffers become available (this avoids it giving us
|
|
* "out of resources" messages).
|
|
*/
|
|
|
|
static void eexp_hw_rxinit(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short rx_block = lp->rx_buf_start;
|
|
unsigned short ioaddr = dev->base_addr;
|
|
|
|
lp->num_rx_bufs = 0;
|
|
lp->rx_first = lp->rx_ptr = rx_block;
|
|
do
|
|
{
|
|
lp->num_rx_bufs++;
|
|
|
|
outw(rx_block, ioaddr + WRITE_PTR);
|
|
|
|
outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
|
|
outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
|
|
outw(0xffff, ioaddr+DATAPORT);
|
|
|
|
outw(0x0000, ioaddr+DATAPORT);
|
|
outw(0xdead, ioaddr+DATAPORT);
|
|
outw(0xdead, ioaddr+DATAPORT);
|
|
outw(0xdead, ioaddr+DATAPORT);
|
|
outw(0xdead, ioaddr+DATAPORT);
|
|
outw(0xdead, ioaddr+DATAPORT);
|
|
outw(0xdead, ioaddr+DATAPORT);
|
|
|
|
outw(0x0000, ioaddr+DATAPORT);
|
|
outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
|
|
outw(rx_block + 0x20, ioaddr+DATAPORT);
|
|
outw(0, ioaddr+DATAPORT);
|
|
outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
|
|
|
|
lp->rx_last = rx_block;
|
|
rx_block += RX_BUF_SIZE;
|
|
} while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
|
|
|
|
|
|
/* Make first Rx frame descriptor point to first Rx buffer
|
|
descriptor */
|
|
outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
|
|
outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
|
|
|
|
/* Close Rx frame descriptor ring */
|
|
outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
|
|
outw(lp->rx_first, ioaddr+DATAPORT);
|
|
|
|
/* Close Rx buffer descriptor ring */
|
|
outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
|
|
outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
|
|
|
|
}
|
|
|
|
/*
|
|
* Un-reset the 586, and start the configuration sequence. We don't wait for
|
|
* this to finish, but allow the interrupt handler to start the CU and RU for
|
|
* us. We can't start the receive/transmission system up before we know that
|
|
* the hardware is configured correctly.
|
|
*/
|
|
|
|
static void eexp_hw_init586(struct net_device *dev)
|
|
{
|
|
struct net_local *lp = netdev_priv(dev);
|
|
unsigned short ioaddr = dev->base_addr;
|
|
int i;
|
|
|
|
#if NET_DEBUG > 6
|
|
printk("%s: eexp_hw_init586()\n", dev->name);
|
|
#endif
|
|
|
|
lp->started = 0;
|
|
|
|
set_loopback(dev);
|
|
|
|
outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
|
|
|
|
/* Download the startup code */
|
|
outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
|
|
outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
|
|
outw(0x0000, ioaddr + 0x8008);
|
|
outw(0x0000, ioaddr + 0x800a);
|
|
outw(0x0000, ioaddr + 0x800c);
|
|
outw(0x0000, ioaddr + 0x800e);
|
|
|
|
for (i = 0; i < (sizeof(start_code)); i+=32) {
|
|
int j;
|
|
outw(i, ioaddr + SM_PTR);
|
|
for (j = 0; j < 16; j+=2)
|
|
outw(start_code[(i+j)/2],
|
|
ioaddr+0x4000+j);
|
|
for (j = 0; j < 16; j+=2)
|
|
outw(start_code[(i+j+16)/2],
|
|
ioaddr+0x8000+j);
|
|
}
|
|
|
|
/* Do we want promiscuous mode or multicast? */
|
|
outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
|
|
i = inw(ioaddr+SHADOW(CONF_PROMISC));
|
|
outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
|
|
ioaddr+SHADOW(CONF_PROMISC));
|
|
lp->was_promisc = dev->flags & IFF_PROMISC;
|
|
#if 0
|
|
eexp_setup_filter(dev);
|
|
#endif
|
|
|
|
/* Write our hardware address */
|
|
outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
|
|
outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
|
|
outw(((unsigned short *)dev->dev_addr)[1],
|
|
ioaddr+SHADOW(CONF_HWADDR+2));
|
|
outw(((unsigned short *)dev->dev_addr)[2],
|
|
ioaddr+SHADOW(CONF_HWADDR+4));
|
|
|
|
eexp_hw_txinit(dev);
|
|
eexp_hw_rxinit(dev);
|
|
|
|
outb(0,ioaddr+EEPROM_Ctrl);
|
|
mdelay(5);
|
|
|
|
scb_command(dev, 0xf000);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
|
|
outw(0, ioaddr+SM_PTR);
|
|
|
|
{
|
|
unsigned short rboguscount=50,rfailcount=5;
|
|
while (inw(ioaddr+0x4000))
|
|
{
|
|
if (!--rboguscount)
|
|
{
|
|
printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
|
|
dev->name);
|
|
scb_command(dev, 0);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
rboguscount = 100;
|
|
if (!--rfailcount)
|
|
{
|
|
printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
|
|
dev->name);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
scb_wrcbl(dev, CONF_LINK);
|
|
scb_command(dev, 0xf000|SCB_CUstart);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
|
|
{
|
|
unsigned short iboguscount=50,ifailcount=5;
|
|
while (!scb_status(dev))
|
|
{
|
|
if (!--iboguscount)
|
|
{
|
|
if (--ifailcount)
|
|
{
|
|
printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
|
|
dev->name, scb_status(dev), scb_rdcmd(dev));
|
|
scb_wrcbl(dev, CONF_LINK);
|
|
scb_command(dev, 0xf000|SCB_CUstart);
|
|
outb(0,ioaddr+SIGNAL_CA);
|
|
iboguscount = 100;
|
|
}
|
|
else
|
|
{
|
|
printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
clear_loopback(dev);
|
|
outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
|
|
|
|
lp->init_time = jiffies;
|
|
#if NET_DEBUG > 6
|
|
printk("%s: leaving eexp_hw_init586()\n", dev->name);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
static void eexp_setup_filter(struct net_device *dev)
|
|
{
|
|
struct dev_mc_list *dmi = dev->mc_list;
|
|
unsigned short ioaddr = dev->base_addr;
|
|
int count = dev->mc_count;
|
|
int i;
|
|
if (count > 8) {
|
|
printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
|
|
dev->name, count);
|
|
count = 8;
|
|
}
|
|
|
|
outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
|
|
outw(count, ioaddr+SHADOW(CONF_NR_MULTICAST));
|
|
for (i = 0; i < count; i++) {
|
|
unsigned short *data = (unsigned short *)dmi->dmi_addr;
|
|
if (!dmi) {
|
|
printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
|
|
break;
|
|
}
|
|
if (dmi->dmi_addrlen != ETH_ALEN) {
|
|
printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
|
|
continue;
|
|
}
|
|
outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
|
|
outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
|
|
outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
|
|
outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
|
|
outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
|
|
outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set or clear the multicast filter for this adaptor.
|
|
*/
|
|
static void
|
|
eexp_set_multicast(struct net_device *dev)
|
|
{
|
|
unsigned short ioaddr = dev->base_addr;
|
|
struct net_local *lp = netdev_priv(dev);
|
|
int kick = 0, i;
|
|
if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
|
|
outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
|
|
i = inw(ioaddr+SHADOW(CONF_PROMISC));
|
|
outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
|
|
ioaddr+SHADOW(CONF_PROMISC));
|
|
lp->was_promisc = dev->flags & IFF_PROMISC;
|
|
kick = 1;
|
|
}
|
|
if (!(dev->flags & IFF_PROMISC)) {
|
|
eexp_setup_filter(dev);
|
|
if (lp->old_mc_count != dev->mc_count) {
|
|
kick = 1;
|
|
lp->old_mc_count = dev->mc_count;
|
|
}
|
|
}
|
|
if (kick) {
|
|
unsigned long oj;
|
|
scb_command(dev, SCB_CUsuspend);
|
|
outb(0, ioaddr+SIGNAL_CA);
|
|
outb(0, ioaddr+SIGNAL_CA);
|
|
#if 0
|
|
printk("%s: waiting for CU to go suspended\n", dev->name);
|
|
#endif
|
|
oj = jiffies;
|
|
while ((SCB_CUstat(scb_status(dev)) == 2) &&
|
|
((jiffies-oj) < 2000));
|
|
if (SCB_CUstat(scb_status(dev)) == 2)
|
|
printk("%s: warning, CU didn't stop\n", dev->name);
|
|
lp->started &= ~(STARTED_CU);
|
|
scb_wrcbl(dev, CONF_LINK);
|
|
scb_command(dev, SCB_CUstart);
|
|
outb(0, ioaddr+SIGNAL_CA);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* MODULE stuff
|
|
*/
|
|
|
|
#ifdef MODULE
|
|
|
|
#define EEXP_MAX_CARDS 4 /* max number of cards to support */
|
|
|
|
static struct net_device *dev_eexp[EEXP_MAX_CARDS];
|
|
static int irq[EEXP_MAX_CARDS];
|
|
static int io[EEXP_MAX_CARDS];
|
|
|
|
module_param_array(io, int, NULL, 0);
|
|
module_param_array(irq, int, NULL, 0);
|
|
MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
|
|
MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
/* Ideally the user would give us io=, irq= for every card. If any parameters
|
|
* are specified, we verify and then use them. If no parameters are given, we
|
|
* autoprobe for one card only.
|
|
*/
|
|
int init_module(void)
|
|
{
|
|
struct net_device *dev;
|
|
int this_dev, found = 0;
|
|
|
|
for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
|
|
dev = alloc_etherdev(sizeof(struct net_local));
|
|
dev->irq = irq[this_dev];
|
|
dev->base_addr = io[this_dev];
|
|
if (io[this_dev] == 0) {
|
|
if (this_dev)
|
|
break;
|
|
printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
|
|
}
|
|
if (do_express_probe(dev) == 0) {
|
|
dev_eexp[this_dev] = dev;
|
|
found++;
|
|
continue;
|
|
}
|
|
printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
|
|
free_netdev(dev);
|
|
break;
|
|
}
|
|
if (found)
|
|
return 0;
|
|
return -ENXIO;
|
|
}
|
|
|
|
void cleanup_module(void)
|
|
{
|
|
int this_dev;
|
|
|
|
for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
|
|
struct net_device *dev = dev_eexp[this_dev];
|
|
if (dev) {
|
|
unregister_netdev(dev);
|
|
free_netdev(dev);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-file-style: "linux"
|
|
* tab-width: 8
|
|
* End:
|
|
*/
|