1 |
1275 |
phoenix |
/*
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* Linux Ethernet device driver for the 3Com Etherlink Plus (3C505)
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* By Craig Southeren, Juha Laiho and Philip Blundell
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*
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* 3c505.c This module implements an interface to the 3Com
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* Etherlink Plus (3c505) Ethernet card. Linux device
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* driver interface reverse engineered from the Linux 3C509
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* device drivers. Some 3C505 information gleaned from
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* the Crynwr packet driver. Still this driver would not
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* be here without 3C505 technical reference provided by
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* 3Com.
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*
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* $Id: 3c505.c,v 1.1.1.1 2004-04-15 01:44:32 phoenix Exp $
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*
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* Authors: Linux 3c505 device driver by
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* Craig Southeren, <craigs@ineluki.apana.org.au>
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* Final debugging by
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* Andrew Tridgell, <tridge@nimbus.anu.edu.au>
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* Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by
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* Juha Laiho, <jlaiho@ichaos.nullnet.fi>
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* Linux 3C509 driver by
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* Donald Becker, <becker@super.org>
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* (Now at <becker@scyld.com>)
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* Crynwr packet driver by
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* Krishnan Gopalan and Gregg Stefancik,
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* Clemson University Engineering Computer Operations.
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* Portions of the code have been adapted from the 3c505
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* driver for NCSA Telnet by Bruce Orchard and later
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* modified by Warren Van Houten and krus@diku.dk.
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* 3C505 technical information provided by
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* Terry Murphy, of 3Com Network Adapter Division
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* Linux 1.3.0 changes by
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* Alan Cox <Alan.Cox@linux.org>
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* More debugging, DMA support, currently maintained by
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* Philip Blundell <Philip.Blundell@pobox.com>
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* Multicard/soft configurable dma channel/rev 2 hardware support
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* by Christopher Collins <ccollins@pcug.org.au>
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* Ethtool support (jgarzik), 11/17/2001
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*/
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#define DRV_NAME "3c505"
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#define DRV_VERSION "1.10a"
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/* Theory of operation:
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*
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* The 3c505 is quite an intelligent board. All communication with it is done
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* by means of Primary Command Blocks (PCBs); these are transferred using PIO
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* through the command register. The card has 256k of on-board RAM, which is
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* used to buffer received packets. It might seem at first that more buffers
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* are better, but in fact this isn't true. From my tests, it seems that
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* more than about 10 buffers are unnecessary, and there is a noticeable
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* performance hit in having more active on the card. So the majority of the
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* card's memory isn't, in fact, used. Sadly, the card only has one transmit
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* buffer and, short of loading our own firmware into it (which is what some
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* drivers resort to) there's nothing we can do about this.
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*
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* We keep up to 4 "receive packet" commands active on the board at a time.
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* When a packet comes in, so long as there is a receive command active, the
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* board will send us a "packet received" PCB and then add the data for that
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* packet to the DMA queue. If a DMA transfer is not already in progress, we
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* set one up to start uploading the data. We have to maintain a list of
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* backlogged receive packets, because the card may decide to tell us about
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* a newly-arrived packet at any time, and we may not be able to start a DMA
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* transfer immediately (ie one may already be going on). We can't NAK the
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* PCB, because then it would throw the packet away.
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*
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* Trying to send a PCB to the card at the wrong moment seems to have bad
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* effects. If we send it a transmit PCB while a receive DMA is happening,
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* it will just NAK the PCB and so we will have wasted our time. Worse, it
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* sometimes seems to interrupt the transfer. The majority of the low-level
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* code is protected by one huge semaphore -- "busy" -- which is set whenever
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* it probably isn't safe to do anything to the card. The receive routine
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* must gain a lock on "busy" before it can start a DMA transfer, and the
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* transmit routine must gain a lock before it sends the first PCB to the card.
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* The send_pcb() routine also has an internal semaphore to protect it against
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* being re-entered (which would be disastrous) -- this is needed because
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* several things can happen asynchronously (re-priming the receiver and
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* asking the card for statistics, for example). send_pcb() will also refuse
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* to talk to the card at all if a DMA upload is happening. The higher-level
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* networking code will reschedule a later retry if some part of the driver
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* is blocked. In practice, this doesn't seem to happen very often.
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*/
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/* This driver may now work with revision 2.x hardware, since all the read
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* operations on the HCR have been removed (we now keep our own softcopy).
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* But I don't have an old card to test it on.
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*
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* This has had the bad effect that the autoprobe routine is now a bit
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* less friendly to other devices. However, it was never very good.
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* before, so I doubt it will hurt anybody.
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*/
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/* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly
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* to make it more reliable, and secondly to add DMA mode. Many things could
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* probably be done better; the concurrency protection is particularly awful.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/ptrace.h>
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#include <linux/errno.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/ioport.h>
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#include <linux/spinlock.h>
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#include <linux/ethtool.h>
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#include <asm/uaccess.h>
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#include <asm/bitops.h>
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#include <asm/io.h>
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#include <asm/dma.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/init.h>
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#include "3c505.h"
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/*********************************************************
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*
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* define debug messages here as common strings to reduce space
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*
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*********************************************************/
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static const char filename[] = __FILE__;
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static const char timeout_msg[] = "*** timeout at %s:%s (line %d) ***\n";
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#define TIMEOUT_MSG(lineno) \
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printk(timeout_msg, filename,__FUNCTION__,(lineno))
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static const char invalid_pcb_msg[] =
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"*** invalid pcb length %d at %s:%s (line %d) ***\n";
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#define INVALID_PCB_MSG(len) \
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printk(invalid_pcb_msg, (len),filename,__FUNCTION__,__LINE__)
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static char search_msg[] __initdata = "%s: Looking for 3c505 adapter at address %#x...";
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static char stilllooking_msg[] __initdata = "still looking...";
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static char found_msg[] __initdata = "found.\n";
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static char notfound_msg[] __initdata = "not found (reason = %d)\n";
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static char couldnot_msg[] __initdata = "%s: 3c505 not found\n";
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/*********************************************************
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*
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* various other debug stuff
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*
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*********************************************************/
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#ifdef ELP_DEBUG
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static int elp_debug = ELP_DEBUG;
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#else
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static int elp_debug;
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#endif
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#define debug elp_debug
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/*
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* 0 = no messages (well, some)
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* 1 = messages when high level commands performed
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* 2 = messages when low level commands performed
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* 3 = messages when interrupts received
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*/
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/*****************************************************************
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*
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* useful macros
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*
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*****************************************************************/
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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/*****************************************************************
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*
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* List of I/O-addresses we try to auto-sense
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* Last element MUST BE 0!
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*****************************************************************/
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static int addr_list[] __initdata = {0x300, 0x280, 0x310, 0};
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/* Dma Memory related stuff */
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static unsigned long dma_mem_alloc(int size)
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{
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int order = get_order(size);
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return __get_dma_pages(GFP_KERNEL, order);
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}
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/*****************************************************************
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*
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* Functions for I/O (note the inline !)
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*
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*****************************************************************/
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static inline unsigned char inb_status(unsigned int base_addr)
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{
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return inb(base_addr + PORT_STATUS);
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}
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static inline int inb_command(unsigned int base_addr)
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{
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return inb(base_addr + PORT_COMMAND);
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}
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static inline void outb_control(unsigned char val, struct net_device *dev)
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{
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outb(val, dev->base_addr + PORT_CONTROL);
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((elp_device *)(dev->priv))->hcr_val = val;
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}
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#define HCR_VAL(x) (((elp_device *)((x)->priv))->hcr_val)
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static inline void outb_command(unsigned char val, unsigned int base_addr)
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{
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outb(val, base_addr + PORT_COMMAND);
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}
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static inline unsigned int inw_data(unsigned int base_addr)
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{
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return inw(base_addr + PORT_DATA);
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}
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static inline void outw_data(unsigned int val, unsigned int base_addr)
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{
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outw(val, base_addr + PORT_DATA);
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}
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static inline unsigned int backlog_next(unsigned int n)
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{
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return (n + 1) % BACKLOG_SIZE;
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}
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/*****************************************************************
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*
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* useful functions for accessing the adapter
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*
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*****************************************************************/
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/*
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* use this routine when accessing the ASF bits as they are
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* changed asynchronously by the adapter
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*/
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/* get adapter PCB status */
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#define GET_ASF(addr) \
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(get_status(addr)&ASF_PCB_MASK)
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static inline int get_status(unsigned int base_addr)
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{
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int timeout = jiffies + 10*HZ/100;
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register int stat1;
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do {
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stat1 = inb_status(base_addr);
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} while (stat1 != inb_status(base_addr) && time_before(jiffies, timeout));
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if (time_after_eq(jiffies, timeout))
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TIMEOUT_MSG(__LINE__);
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return stat1;
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}
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static inline void set_hsf(struct net_device *dev, int hsf)
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{
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cli();
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outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev);
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sti();
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}
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282 |
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283 |
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static int start_receive(struct net_device *, pcb_struct *);
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285 |
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inline static void adapter_reset(struct net_device *dev)
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{
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287 |
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int timeout;
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elp_device *adapter = dev->priv;
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unsigned char orig_hcr = adapter->hcr_val;
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outb_control(0, dev);
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if (inb_status(dev->base_addr) & ACRF) {
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294 |
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do {
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inb_command(dev->base_addr);
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timeout = jiffies + 2*HZ/100;
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while (time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF));
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298 |
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} while (inb_status(dev->base_addr) & ACRF);
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299 |
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set_hsf(dev, HSF_PCB_NAK);
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}
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outb_control(adapter->hcr_val | ATTN | DIR, dev);
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timeout = jiffies + 1*HZ/100;
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while (time_before_eq(jiffies, timeout));
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outb_control(adapter->hcr_val & ~ATTN, dev);
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timeout = jiffies + 1*HZ/100;
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while (time_before_eq(jiffies, timeout));
|
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outb_control(adapter->hcr_val | FLSH, dev);
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timeout = jiffies + 1*HZ/100;
|
309 |
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while (time_before_eq(jiffies, timeout));
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outb_control(adapter->hcr_val & ~FLSH, dev);
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311 |
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timeout = jiffies + 1*HZ/100;
|
312 |
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while (time_before_eq(jiffies, timeout));
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313 |
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314 |
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outb_control(orig_hcr, dev);
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315 |
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if (!start_receive(dev, &adapter->tx_pcb))
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printk("%s: start receive command failed \n", dev->name);
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}
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318 |
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|
319 |
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/* Check to make sure that a DMA transfer hasn't timed out. This should
|
320 |
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* never happen in theory, but seems to occur occasionally if the card gets
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321 |
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* prodded at the wrong time.
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*/
|
323 |
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static inline void check_3c505_dma(struct net_device *dev)
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{
|
325 |
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elp_device *adapter = dev->priv;
|
326 |
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if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) {
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327 |
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unsigned long flags, f;
|
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printk("%s: DMA %s timed out, %d bytes left\n", dev->name, adapter->current_dma.direction ? "download" : "upload", get_dma_residue(dev->dma));
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329 |
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save_flags(flags);
|
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cli();
|
331 |
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adapter->dmaing = 0;
|
332 |
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adapter->busy = 0;
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333 |
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|
334 |
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f=claim_dma_lock();
|
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disable_dma(dev->dma);
|
336 |
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release_dma_lock(f);
|
337 |
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|
338 |
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if (adapter->rx_active)
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adapter->rx_active--;
|
340 |
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outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
|
341 |
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restore_flags(flags);
|
342 |
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}
|
343 |
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}
|
344 |
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|
345 |
|
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/* Primitive functions used by send_pcb() */
|
346 |
|
|
static inline unsigned int send_pcb_slow(unsigned int base_addr, unsigned char byte)
|
347 |
|
|
{
|
348 |
|
|
unsigned int timeout;
|
349 |
|
|
outb_command(byte, base_addr);
|
350 |
|
|
for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
|
351 |
|
|
if (inb_status(base_addr) & HCRE)
|
352 |
|
|
return FALSE;
|
353 |
|
|
}
|
354 |
|
|
printk("3c505: send_pcb_slow timed out\n");
|
355 |
|
|
return TRUE;
|
356 |
|
|
}
|
357 |
|
|
|
358 |
|
|
static inline unsigned int send_pcb_fast(unsigned int base_addr, unsigned char byte)
|
359 |
|
|
{
|
360 |
|
|
unsigned int timeout;
|
361 |
|
|
outb_command(byte, base_addr);
|
362 |
|
|
for (timeout = 0; timeout < 40000; timeout++) {
|
363 |
|
|
if (inb_status(base_addr) & HCRE)
|
364 |
|
|
return FALSE;
|
365 |
|
|
}
|
366 |
|
|
printk("3c505: send_pcb_fast timed out\n");
|
367 |
|
|
return TRUE;
|
368 |
|
|
}
|
369 |
|
|
|
370 |
|
|
/* Check to see if the receiver needs restarting, and kick it if so */
|
371 |
|
|
static inline void prime_rx(struct net_device *dev)
|
372 |
|
|
{
|
373 |
|
|
elp_device *adapter = dev->priv;
|
374 |
|
|
while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) {
|
375 |
|
|
if (!start_receive(dev, &adapter->itx_pcb))
|
376 |
|
|
break;
|
377 |
|
|
}
|
378 |
|
|
}
|
379 |
|
|
|
380 |
|
|
/*****************************************************************
|
381 |
|
|
*
|
382 |
|
|
* send_pcb
|
383 |
|
|
* Send a PCB to the adapter.
|
384 |
|
|
*
|
385 |
|
|
* output byte to command reg --<--+
|
386 |
|
|
* wait until HCRE is non zero |
|
387 |
|
|
* loop until all bytes sent -->--+
|
388 |
|
|
* set HSF1 and HSF2 to 1
|
389 |
|
|
* output pcb length
|
390 |
|
|
* wait until ASF give ACK or NAK
|
391 |
|
|
* set HSF1 and HSF2 to 0
|
392 |
|
|
*
|
393 |
|
|
*****************************************************************/
|
394 |
|
|
|
395 |
|
|
/* This can be quite slow -- the adapter is allowed to take up to 40ms
|
396 |
|
|
* to respond to the initial interrupt.
|
397 |
|
|
*
|
398 |
|
|
* We run initially with interrupts turned on, but with a semaphore set
|
399 |
|
|
* so that nobody tries to re-enter this code. Once the first byte has
|
400 |
|
|
* gone through, we turn interrupts off and then send the others (the
|
401 |
|
|
* timeout is reduced to 500us).
|
402 |
|
|
*/
|
403 |
|
|
|
404 |
|
|
static int send_pcb(struct net_device *dev, pcb_struct * pcb)
|
405 |
|
|
{
|
406 |
|
|
int i;
|
407 |
|
|
int timeout;
|
408 |
|
|
elp_device *adapter = dev->priv;
|
409 |
|
|
|
410 |
|
|
check_3c505_dma(dev);
|
411 |
|
|
|
412 |
|
|
if (adapter->dmaing && adapter->current_dma.direction == 0)
|
413 |
|
|
return FALSE;
|
414 |
|
|
|
415 |
|
|
/* Avoid contention */
|
416 |
|
|
if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) {
|
417 |
|
|
if (elp_debug >= 3) {
|
418 |
|
|
printk("%s: send_pcb entered while threaded\n", dev->name);
|
419 |
|
|
}
|
420 |
|
|
return FALSE;
|
421 |
|
|
}
|
422 |
|
|
/*
|
423 |
|
|
* load each byte into the command register and
|
424 |
|
|
* wait for the HCRE bit to indicate the adapter
|
425 |
|
|
* had read the byte
|
426 |
|
|
*/
|
427 |
|
|
set_hsf(dev, 0);
|
428 |
|
|
|
429 |
|
|
if (send_pcb_slow(dev->base_addr, pcb->command))
|
430 |
|
|
goto abort;
|
431 |
|
|
|
432 |
|
|
cli();
|
433 |
|
|
|
434 |
|
|
if (send_pcb_fast(dev->base_addr, pcb->length))
|
435 |
|
|
goto sti_abort;
|
436 |
|
|
|
437 |
|
|
for (i = 0; i < pcb->length; i++) {
|
438 |
|
|
if (send_pcb_fast(dev->base_addr, pcb->data.raw[i]))
|
439 |
|
|
goto sti_abort;
|
440 |
|
|
}
|
441 |
|
|
|
442 |
|
|
outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */
|
443 |
|
|
outb_command(2 + pcb->length, dev->base_addr);
|
444 |
|
|
|
445 |
|
|
/* now wait for the acknowledgement */
|
446 |
|
|
sti();
|
447 |
|
|
|
448 |
|
|
for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
|
449 |
|
|
switch (GET_ASF(dev->base_addr)) {
|
450 |
|
|
case ASF_PCB_ACK:
|
451 |
|
|
adapter->send_pcb_semaphore = 0;
|
452 |
|
|
return TRUE;
|
453 |
|
|
break;
|
454 |
|
|
case ASF_PCB_NAK:
|
455 |
|
|
#ifdef ELP_DEBUG
|
456 |
|
|
printk(KERN_DEBUG "%s: send_pcb got NAK\n", dev->name);
|
457 |
|
|
#endif
|
458 |
|
|
goto abort;
|
459 |
|
|
break;
|
460 |
|
|
}
|
461 |
|
|
}
|
462 |
|
|
|
463 |
|
|
if (elp_debug >= 1)
|
464 |
|
|
printk("%s: timeout waiting for PCB acknowledge (status %02x)\n", dev->name, inb_status(dev->base_addr));
|
465 |
|
|
|
466 |
|
|
sti_abort:
|
467 |
|
|
sti();
|
468 |
|
|
abort:
|
469 |
|
|
adapter->send_pcb_semaphore = 0;
|
470 |
|
|
return FALSE;
|
471 |
|
|
}
|
472 |
|
|
|
473 |
|
|
|
474 |
|
|
/*****************************************************************
|
475 |
|
|
*
|
476 |
|
|
* receive_pcb
|
477 |
|
|
* Read a PCB from the adapter
|
478 |
|
|
*
|
479 |
|
|
* wait for ACRF to be non-zero ---<---+
|
480 |
|
|
* input a byte |
|
481 |
|
|
* if ASF1 and ASF2 were not both one |
|
482 |
|
|
* before byte was read, loop --->---+
|
483 |
|
|
* set HSF1 and HSF2 for ack
|
484 |
|
|
*
|
485 |
|
|
*****************************************************************/
|
486 |
|
|
|
487 |
|
|
static int receive_pcb(struct net_device *dev, pcb_struct * pcb)
|
488 |
|
|
{
|
489 |
|
|
int i, j;
|
490 |
|
|
int total_length;
|
491 |
|
|
int stat;
|
492 |
|
|
int timeout;
|
493 |
|
|
|
494 |
|
|
elp_device *adapter = dev->priv;
|
495 |
|
|
|
496 |
|
|
set_hsf(dev, 0);
|
497 |
|
|
|
498 |
|
|
/* get the command code */
|
499 |
|
|
timeout = jiffies + 2*HZ/100;
|
500 |
|
|
while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
|
501 |
|
|
if (time_after_eq(jiffies, timeout)) {
|
502 |
|
|
TIMEOUT_MSG(__LINE__);
|
503 |
|
|
return FALSE;
|
504 |
|
|
}
|
505 |
|
|
pcb->command = inb_command(dev->base_addr);
|
506 |
|
|
|
507 |
|
|
/* read the data length */
|
508 |
|
|
timeout = jiffies + 3*HZ/100;
|
509 |
|
|
while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
|
510 |
|
|
if (time_after_eq(jiffies, timeout)) {
|
511 |
|
|
TIMEOUT_MSG(__LINE__);
|
512 |
|
|
printk("%s: status %02x\n", dev->name, stat);
|
513 |
|
|
return FALSE;
|
514 |
|
|
}
|
515 |
|
|
pcb->length = inb_command(dev->base_addr);
|
516 |
|
|
|
517 |
|
|
if (pcb->length > MAX_PCB_DATA) {
|
518 |
|
|
INVALID_PCB_MSG(pcb->length);
|
519 |
|
|
adapter_reset(dev);
|
520 |
|
|
return FALSE;
|
521 |
|
|
}
|
522 |
|
|
/* read the data */
|
523 |
|
|
cli();
|
524 |
|
|
i = 0;
|
525 |
|
|
do {
|
526 |
|
|
j = 0;
|
527 |
|
|
while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && j++ < 20000);
|
528 |
|
|
pcb->data.raw[i++] = inb_command(dev->base_addr);
|
529 |
|
|
if (i > MAX_PCB_DATA)
|
530 |
|
|
INVALID_PCB_MSG(i);
|
531 |
|
|
} while ((stat & ASF_PCB_MASK) != ASF_PCB_END && j < 20000);
|
532 |
|
|
sti();
|
533 |
|
|
if (j >= 20000) {
|
534 |
|
|
TIMEOUT_MSG(__LINE__);
|
535 |
|
|
return FALSE;
|
536 |
|
|
}
|
537 |
|
|
/* woops, the last "data" byte was really the length! */
|
538 |
|
|
total_length = pcb->data.raw[--i];
|
539 |
|
|
|
540 |
|
|
/* safety check total length vs data length */
|
541 |
|
|
if (total_length != (pcb->length + 2)) {
|
542 |
|
|
if (elp_debug >= 2)
|
543 |
|
|
printk("%s: mangled PCB received\n", dev->name);
|
544 |
|
|
set_hsf(dev, HSF_PCB_NAK);
|
545 |
|
|
return FALSE;
|
546 |
|
|
}
|
547 |
|
|
|
548 |
|
|
if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) {
|
549 |
|
|
if (test_and_set_bit(0, (void *) &adapter->busy)) {
|
550 |
|
|
if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) {
|
551 |
|
|
set_hsf(dev, HSF_PCB_NAK);
|
552 |
|
|
printk("%s: PCB rejected, transfer in progress and backlog full\n", dev->name);
|
553 |
|
|
pcb->command = 0;
|
554 |
|
|
return TRUE;
|
555 |
|
|
} else {
|
556 |
|
|
pcb->command = 0xff;
|
557 |
|
|
}
|
558 |
|
|
}
|
559 |
|
|
}
|
560 |
|
|
set_hsf(dev, HSF_PCB_ACK);
|
561 |
|
|
return TRUE;
|
562 |
|
|
}
|
563 |
|
|
|
564 |
|
|
/******************************************************
|
565 |
|
|
*
|
566 |
|
|
* queue a receive command on the adapter so we will get an
|
567 |
|
|
* interrupt when a packet is received.
|
568 |
|
|
*
|
569 |
|
|
******************************************************/
|
570 |
|
|
|
571 |
|
|
static int start_receive(struct net_device *dev, pcb_struct * tx_pcb)
|
572 |
|
|
{
|
573 |
|
|
int status;
|
574 |
|
|
elp_device *adapter = dev->priv;
|
575 |
|
|
|
576 |
|
|
if (elp_debug >= 3)
|
577 |
|
|
printk("%s: restarting receiver\n", dev->name);
|
578 |
|
|
tx_pcb->command = CMD_RECEIVE_PACKET;
|
579 |
|
|
tx_pcb->length = sizeof(struct Rcv_pkt);
|
580 |
|
|
tx_pcb->data.rcv_pkt.buf_seg
|
581 |
|
|
= tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */
|
582 |
|
|
tx_pcb->data.rcv_pkt.buf_len = 1600;
|
583 |
|
|
tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */
|
584 |
|
|
status = send_pcb(dev, tx_pcb);
|
585 |
|
|
if (status)
|
586 |
|
|
adapter->rx_active++;
|
587 |
|
|
return status;
|
588 |
|
|
}
|
589 |
|
|
|
590 |
|
|
/******************************************************
|
591 |
|
|
*
|
592 |
|
|
* extract a packet from the adapter
|
593 |
|
|
* this routine is only called from within the interrupt
|
594 |
|
|
* service routine, so no cli/sti calls are needed
|
595 |
|
|
* note that the length is always assumed to be even
|
596 |
|
|
*
|
597 |
|
|
******************************************************/
|
598 |
|
|
|
599 |
|
|
static void receive_packet(struct net_device *dev, int len)
|
600 |
|
|
{
|
601 |
|
|
int rlen;
|
602 |
|
|
elp_device *adapter = dev->priv;
|
603 |
|
|
void *target;
|
604 |
|
|
struct sk_buff *skb;
|
605 |
|
|
unsigned long flags;
|
606 |
|
|
|
607 |
|
|
rlen = (len + 1) & ~1;
|
608 |
|
|
skb = dev_alloc_skb(rlen + 2);
|
609 |
|
|
|
610 |
|
|
if (!skb) {
|
611 |
|
|
printk("%s: memory squeeze, dropping packet\n", dev->name);
|
612 |
|
|
target = adapter->dma_buffer;
|
613 |
|
|
adapter->current_dma.target = NULL;
|
614 |
|
|
return;
|
615 |
|
|
}
|
616 |
|
|
|
617 |
|
|
skb_reserve(skb, 2);
|
618 |
|
|
target = skb_put(skb, rlen);
|
619 |
|
|
if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) {
|
620 |
|
|
adapter->current_dma.target = target;
|
621 |
|
|
target = adapter->dma_buffer;
|
622 |
|
|
} else {
|
623 |
|
|
adapter->current_dma.target = NULL;
|
624 |
|
|
}
|
625 |
|
|
|
626 |
|
|
/* if this happens, we die */
|
627 |
|
|
if (test_and_set_bit(0, (void *) &adapter->dmaing))
|
628 |
|
|
printk("%s: rx blocked, DMA in progress, dir %d\n", dev->name, adapter->current_dma.direction);
|
629 |
|
|
|
630 |
|
|
skb->dev = dev;
|
631 |
|
|
adapter->current_dma.direction = 0;
|
632 |
|
|
adapter->current_dma.length = rlen;
|
633 |
|
|
adapter->current_dma.skb = skb;
|
634 |
|
|
adapter->current_dma.start_time = jiffies;
|
635 |
|
|
|
636 |
|
|
outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev);
|
637 |
|
|
|
638 |
|
|
flags=claim_dma_lock();
|
639 |
|
|
disable_dma(dev->dma);
|
640 |
|
|
clear_dma_ff(dev->dma);
|
641 |
|
|
set_dma_mode(dev->dma, 0x04); /* dma read */
|
642 |
|
|
set_dma_addr(dev->dma, virt_to_bus(target));
|
643 |
|
|
set_dma_count(dev->dma, rlen);
|
644 |
|
|
enable_dma(dev->dma);
|
645 |
|
|
release_dma_lock(flags);
|
646 |
|
|
|
647 |
|
|
if (elp_debug >= 3) {
|
648 |
|
|
printk("%s: rx DMA transfer started\n", dev->name);
|
649 |
|
|
}
|
650 |
|
|
|
651 |
|
|
if (adapter->rx_active)
|
652 |
|
|
adapter->rx_active--;
|
653 |
|
|
|
654 |
|
|
if (!adapter->busy)
|
655 |
|
|
printk("%s: receive_packet called, busy not set.\n", dev->name);
|
656 |
|
|
}
|
657 |
|
|
|
658 |
|
|
/******************************************************
|
659 |
|
|
*
|
660 |
|
|
* interrupt handler
|
661 |
|
|
*
|
662 |
|
|
******************************************************/
|
663 |
|
|
|
664 |
|
|
static void elp_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
|
665 |
|
|
{
|
666 |
|
|
int len;
|
667 |
|
|
int dlen;
|
668 |
|
|
int icount = 0;
|
669 |
|
|
struct net_device *dev;
|
670 |
|
|
elp_device *adapter;
|
671 |
|
|
int timeout;
|
672 |
|
|
|
673 |
|
|
dev = dev_id;
|
674 |
|
|
adapter = (elp_device *) dev->priv;
|
675 |
|
|
|
676 |
|
|
spin_lock(&adapter->lock);
|
677 |
|
|
|
678 |
|
|
do {
|
679 |
|
|
/*
|
680 |
|
|
* has a DMA transfer finished?
|
681 |
|
|
*/
|
682 |
|
|
if (inb_status(dev->base_addr) & DONE) {
|
683 |
|
|
if (!adapter->dmaing) {
|
684 |
|
|
printk("%s: phantom DMA completed\n", dev->name);
|
685 |
|
|
}
|
686 |
|
|
if (elp_debug >= 3) {
|
687 |
|
|
printk("%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ? "tx" : "rx", inb_status(dev->base_addr));
|
688 |
|
|
}
|
689 |
|
|
|
690 |
|
|
outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
|
691 |
|
|
if (adapter->current_dma.direction) {
|
692 |
|
|
dev_kfree_skb_irq(adapter->current_dma.skb);
|
693 |
|
|
} else {
|
694 |
|
|
struct sk_buff *skb = adapter->current_dma.skb;
|
695 |
|
|
if (skb) {
|
696 |
|
|
if (adapter->current_dma.target) {
|
697 |
|
|
/* have already done the skb_put() */
|
698 |
|
|
memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length);
|
699 |
|
|
}
|
700 |
|
|
skb->protocol = eth_type_trans(skb,dev);
|
701 |
|
|
adapter->stats.rx_bytes += skb->len;
|
702 |
|
|
netif_rx(skb);
|
703 |
|
|
dev->last_rx = jiffies;
|
704 |
|
|
}
|
705 |
|
|
}
|
706 |
|
|
adapter->dmaing = 0;
|
707 |
|
|
if (adapter->rx_backlog.in != adapter->rx_backlog.out) {
|
708 |
|
|
int t = adapter->rx_backlog.length[adapter->rx_backlog.out];
|
709 |
|
|
adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out);
|
710 |
|
|
if (elp_debug >= 2)
|
711 |
|
|
printk("%s: receiving backlogged packet (%d)\n", dev->name, t);
|
712 |
|
|
receive_packet(dev, t);
|
713 |
|
|
} else {
|
714 |
|
|
adapter->busy = 0;
|
715 |
|
|
}
|
716 |
|
|
} else {
|
717 |
|
|
/* has one timed out? */
|
718 |
|
|
check_3c505_dma(dev);
|
719 |
|
|
}
|
720 |
|
|
|
721 |
|
|
/*
|
722 |
|
|
* receive a PCB from the adapter
|
723 |
|
|
*/
|
724 |
|
|
timeout = jiffies + 3*HZ/100;
|
725 |
|
|
while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) {
|
726 |
|
|
if (receive_pcb(dev, &adapter->irx_pcb)) {
|
727 |
|
|
switch (adapter->irx_pcb.command)
|
728 |
|
|
{
|
729 |
|
|
case 0:
|
730 |
|
|
break;
|
731 |
|
|
/*
|
732 |
|
|
* received a packet - this must be handled fast
|
733 |
|
|
*/
|
734 |
|
|
case 0xff:
|
735 |
|
|
case CMD_RECEIVE_PACKET_COMPLETE:
|
736 |
|
|
/* if the device isn't open, don't pass packets up the stack */
|
737 |
|
|
if (!netif_running(dev))
|
738 |
|
|
break;
|
739 |
|
|
len = adapter->irx_pcb.data.rcv_resp.pkt_len;
|
740 |
|
|
dlen = adapter->irx_pcb.data.rcv_resp.buf_len;
|
741 |
|
|
if (adapter->irx_pcb.data.rcv_resp.timeout != 0) {
|
742 |
|
|
printk(KERN_ERR "%s: interrupt - packet not received correctly\n", dev->name);
|
743 |
|
|
} else {
|
744 |
|
|
if (elp_debug >= 3) {
|
745 |
|
|
printk("%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen);
|
746 |
|
|
}
|
747 |
|
|
if (adapter->irx_pcb.command == 0xff) {
|
748 |
|
|
if (elp_debug >= 2)
|
749 |
|
|
printk("%s: adding packet to backlog (len = %d)\n", dev->name, dlen);
|
750 |
|
|
adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen;
|
751 |
|
|
adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in);
|
752 |
|
|
} else {
|
753 |
|
|
receive_packet(dev, dlen);
|
754 |
|
|
}
|
755 |
|
|
if (elp_debug >= 3)
|
756 |
|
|
printk("%s: packet received\n", dev->name);
|
757 |
|
|
}
|
758 |
|
|
break;
|
759 |
|
|
|
760 |
|
|
/*
|
761 |
|
|
* 82586 configured correctly
|
762 |
|
|
*/
|
763 |
|
|
case CMD_CONFIGURE_82586_RESPONSE:
|
764 |
|
|
adapter->got[CMD_CONFIGURE_82586] = 1;
|
765 |
|
|
if (elp_debug >= 3)
|
766 |
|
|
printk("%s: interrupt - configure response received\n", dev->name);
|
767 |
|
|
break;
|
768 |
|
|
|
769 |
|
|
/*
|
770 |
|
|
* Adapter memory configuration
|
771 |
|
|
*/
|
772 |
|
|
case CMD_CONFIGURE_ADAPTER_RESPONSE:
|
773 |
|
|
adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1;
|
774 |
|
|
if (elp_debug >= 3)
|
775 |
|
|
printk("%s: Adapter memory configuration %s.\n", dev->name,
|
776 |
|
|
adapter->irx_pcb.data.failed ? "failed" : "succeeded");
|
777 |
|
|
break;
|
778 |
|
|
|
779 |
|
|
/*
|
780 |
|
|
* Multicast list loading
|
781 |
|
|
*/
|
782 |
|
|
case CMD_LOAD_MULTICAST_RESPONSE:
|
783 |
|
|
adapter->got[CMD_LOAD_MULTICAST_LIST] = 1;
|
784 |
|
|
if (elp_debug >= 3)
|
785 |
|
|
printk("%s: Multicast address list loading %s.\n", dev->name,
|
786 |
|
|
adapter->irx_pcb.data.failed ? "failed" : "succeeded");
|
787 |
|
|
break;
|
788 |
|
|
|
789 |
|
|
/*
|
790 |
|
|
* Station address setting
|
791 |
|
|
*/
|
792 |
|
|
case CMD_SET_ADDRESS_RESPONSE:
|
793 |
|
|
adapter->got[CMD_SET_STATION_ADDRESS] = 1;
|
794 |
|
|
if (elp_debug >= 3)
|
795 |
|
|
printk("%s: Ethernet address setting %s.\n", dev->name,
|
796 |
|
|
adapter->irx_pcb.data.failed ? "failed" : "succeeded");
|
797 |
|
|
break;
|
798 |
|
|
|
799 |
|
|
|
800 |
|
|
/*
|
801 |
|
|
* received board statistics
|
802 |
|
|
*/
|
803 |
|
|
case CMD_NETWORK_STATISTICS_RESPONSE:
|
804 |
|
|
adapter->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv;
|
805 |
|
|
adapter->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit;
|
806 |
|
|
adapter->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC;
|
807 |
|
|
adapter->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align;
|
808 |
|
|
adapter->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun;
|
809 |
|
|
adapter->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res;
|
810 |
|
|
adapter->got[CMD_NETWORK_STATISTICS] = 1;
|
811 |
|
|
if (elp_debug >= 3)
|
812 |
|
|
printk("%s: interrupt - statistics response received\n", dev->name);
|
813 |
|
|
break;
|
814 |
|
|
|
815 |
|
|
/*
|
816 |
|
|
* sent a packet
|
817 |
|
|
*/
|
818 |
|
|
case CMD_TRANSMIT_PACKET_COMPLETE:
|
819 |
|
|
if (elp_debug >= 3)
|
820 |
|
|
printk("%s: interrupt - packet sent\n", dev->name);
|
821 |
|
|
if (!netif_running(dev))
|
822 |
|
|
break;
|
823 |
|
|
switch (adapter->irx_pcb.data.xmit_resp.c_stat) {
|
824 |
|
|
case 0xffff:
|
825 |
|
|
adapter->stats.tx_aborted_errors++;
|
826 |
|
|
printk(KERN_INFO "%s: transmit timed out, network cable problem?\n", dev->name);
|
827 |
|
|
break;
|
828 |
|
|
case 0xfffe:
|
829 |
|
|
adapter->stats.tx_fifo_errors++;
|
830 |
|
|
printk(KERN_INFO "%s: transmit timed out, FIFO underrun\n", dev->name);
|
831 |
|
|
break;
|
832 |
|
|
}
|
833 |
|
|
netif_wake_queue(dev);
|
834 |
|
|
break;
|
835 |
|
|
|
836 |
|
|
/*
|
837 |
|
|
* some unknown PCB
|
838 |
|
|
*/
|
839 |
|
|
default:
|
840 |
|
|
printk(KERN_DEBUG "%s: unknown PCB received - %2.2x\n", dev->name, adapter->irx_pcb.command);
|
841 |
|
|
break;
|
842 |
|
|
}
|
843 |
|
|
} else {
|
844 |
|
|
printk("%s: failed to read PCB on interrupt\n", dev->name);
|
845 |
|
|
adapter_reset(dev);
|
846 |
|
|
}
|
847 |
|
|
}
|
848 |
|
|
|
849 |
|
|
} while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE)));
|
850 |
|
|
|
851 |
|
|
prime_rx(dev);
|
852 |
|
|
|
853 |
|
|
/*
|
854 |
|
|
* indicate no longer in interrupt routine
|
855 |
|
|
*/
|
856 |
|
|
spin_unlock(&adapter->lock);
|
857 |
|
|
}
|
858 |
|
|
|
859 |
|
|
|
860 |
|
|
/******************************************************
|
861 |
|
|
*
|
862 |
|
|
* open the board
|
863 |
|
|
*
|
864 |
|
|
******************************************************/
|
865 |
|
|
|
866 |
|
|
static int elp_open(struct net_device *dev)
|
867 |
|
|
{
|
868 |
|
|
elp_device *adapter;
|
869 |
|
|
int retval;
|
870 |
|
|
|
871 |
|
|
adapter = dev->priv;
|
872 |
|
|
|
873 |
|
|
if (elp_debug >= 3)
|
874 |
|
|
printk("%s: request to open device\n", dev->name);
|
875 |
|
|
|
876 |
|
|
/*
|
877 |
|
|
* make sure we actually found the device
|
878 |
|
|
*/
|
879 |
|
|
if (adapter == NULL) {
|
880 |
|
|
printk("%s: Opening a non-existent physical device\n", dev->name);
|
881 |
|
|
return -EAGAIN;
|
882 |
|
|
}
|
883 |
|
|
/*
|
884 |
|
|
* disable interrupts on the board
|
885 |
|
|
*/
|
886 |
|
|
outb_control(0, dev);
|
887 |
|
|
|
888 |
|
|
/*
|
889 |
|
|
* clear any pending interrupts
|
890 |
|
|
*/
|
891 |
|
|
inb_command(dev->base_addr);
|
892 |
|
|
adapter_reset(dev);
|
893 |
|
|
|
894 |
|
|
/*
|
895 |
|
|
* no receive PCBs active
|
896 |
|
|
*/
|
897 |
|
|
adapter->rx_active = 0;
|
898 |
|
|
|
899 |
|
|
adapter->busy = 0;
|
900 |
|
|
adapter->send_pcb_semaphore = 0;
|
901 |
|
|
adapter->rx_backlog.in = 0;
|
902 |
|
|
adapter->rx_backlog.out = 0;
|
903 |
|
|
|
904 |
|
|
spin_lock_init(&adapter->lock);
|
905 |
|
|
|
906 |
|
|
/*
|
907 |
|
|
* install our interrupt service routine
|
908 |
|
|
*/
|
909 |
|
|
if ((retval = request_irq(dev->irq, &elp_interrupt, 0, dev->name, dev))) {
|
910 |
|
|
printk(KERN_ERR "%s: could not allocate IRQ%d\n", dev->name, dev->irq);
|
911 |
|
|
return retval;
|
912 |
|
|
}
|
913 |
|
|
if ((retval = request_dma(dev->dma, dev->name))) {
|
914 |
|
|
free_irq(dev->irq, dev);
|
915 |
|
|
printk(KERN_ERR "%s: could not allocate DMA%d channel\n", dev->name, dev->dma);
|
916 |
|
|
return retval;
|
917 |
|
|
}
|
918 |
|
|
adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE);
|
919 |
|
|
if (!adapter->dma_buffer) {
|
920 |
|
|
printk(KERN_ERR "%s: could not allocate DMA buffer\n", dev->name);
|
921 |
|
|
free_dma(dev->dma);
|
922 |
|
|
free_irq(dev->irq, dev);
|
923 |
|
|
return -ENOMEM;
|
924 |
|
|
}
|
925 |
|
|
adapter->dmaing = 0;
|
926 |
|
|
|
927 |
|
|
/*
|
928 |
|
|
* enable interrupts on the board
|
929 |
|
|
*/
|
930 |
|
|
outb_control(CMDE, dev);
|
931 |
|
|
|
932 |
|
|
/*
|
933 |
|
|
* configure adapter memory: we need 10 multicast addresses, default==0
|
934 |
|
|
*/
|
935 |
|
|
if (elp_debug >= 3)
|
936 |
|
|
printk(KERN_DEBUG "%s: sending 3c505 memory configuration command\n", dev->name);
|
937 |
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
|
938 |
|
|
adapter->tx_pcb.data.memconf.cmd_q = 10;
|
939 |
|
|
adapter->tx_pcb.data.memconf.rcv_q = 20;
|
940 |
|
|
adapter->tx_pcb.data.memconf.mcast = 10;
|
941 |
|
|
adapter->tx_pcb.data.memconf.frame = 20;
|
942 |
|
|
adapter->tx_pcb.data.memconf.rcv_b = 20;
|
943 |
|
|
adapter->tx_pcb.data.memconf.progs = 0;
|
944 |
|
|
adapter->tx_pcb.length = sizeof(struct Memconf);
|
945 |
|
|
adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0;
|
946 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
947 |
|
|
printk("%s: couldn't send memory configuration command\n", dev->name);
|
948 |
|
|
else {
|
949 |
|
|
int timeout = jiffies + TIMEOUT;
|
950 |
|
|
while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout));
|
951 |
|
|
if (time_after_eq(jiffies, timeout))
|
952 |
|
|
TIMEOUT_MSG(__LINE__);
|
953 |
|
|
}
|
954 |
|
|
|
955 |
|
|
|
956 |
|
|
/*
|
957 |
|
|
* configure adapter to receive broadcast messages and wait for response
|
958 |
|
|
*/
|
959 |
|
|
if (elp_debug >= 3)
|
960 |
|
|
printk("%s: sending 82586 configure command\n", dev->name);
|
961 |
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_82586;
|
962 |
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
|
963 |
|
|
adapter->tx_pcb.length = 2;
|
964 |
|
|
adapter->got[CMD_CONFIGURE_82586] = 0;
|
965 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
966 |
|
|
printk("%s: couldn't send 82586 configure command\n", dev->name);
|
967 |
|
|
else {
|
968 |
|
|
int timeout = jiffies + TIMEOUT;
|
969 |
|
|
while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
|
970 |
|
|
if (time_after_eq(jiffies, timeout))
|
971 |
|
|
TIMEOUT_MSG(__LINE__);
|
972 |
|
|
}
|
973 |
|
|
|
974 |
|
|
/* enable burst-mode DMA */
|
975 |
|
|
/* outb(0x1, dev->base_addr + PORT_AUXDMA); */
|
976 |
|
|
|
977 |
|
|
/*
|
978 |
|
|
* queue receive commands to provide buffering
|
979 |
|
|
*/
|
980 |
|
|
prime_rx(dev);
|
981 |
|
|
if (elp_debug >= 3)
|
982 |
|
|
printk("%s: %d receive PCBs active\n", dev->name, adapter->rx_active);
|
983 |
|
|
|
984 |
|
|
/*
|
985 |
|
|
* device is now officially open!
|
986 |
|
|
*/
|
987 |
|
|
|
988 |
|
|
netif_start_queue(dev);
|
989 |
|
|
return 0;
|
990 |
|
|
}
|
991 |
|
|
|
992 |
|
|
|
993 |
|
|
/******************************************************
|
994 |
|
|
*
|
995 |
|
|
* send a packet to the adapter
|
996 |
|
|
*
|
997 |
|
|
******************************************************/
|
998 |
|
|
|
999 |
|
|
static int send_packet(struct net_device *dev, struct sk_buff *skb)
|
1000 |
|
|
{
|
1001 |
|
|
elp_device *adapter = dev->priv;
|
1002 |
|
|
unsigned long target;
|
1003 |
|
|
unsigned long flags;
|
1004 |
|
|
|
1005 |
|
|
/*
|
1006 |
|
|
* make sure the length is even and no shorter than 60 bytes
|
1007 |
|
|
*/
|
1008 |
|
|
unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1);
|
1009 |
|
|
|
1010 |
|
|
if (test_and_set_bit(0, (void *) &adapter->busy)) {
|
1011 |
|
|
if (elp_debug >= 2)
|
1012 |
|
|
printk("%s: transmit blocked\n", dev->name);
|
1013 |
|
|
return FALSE;
|
1014 |
|
|
}
|
1015 |
|
|
|
1016 |
|
|
adapter->stats.tx_bytes += nlen;
|
1017 |
|
|
|
1018 |
|
|
/*
|
1019 |
|
|
* send the adapter a transmit packet command. Ignore segment and offset
|
1020 |
|
|
* and make sure the length is even
|
1021 |
|
|
*/
|
1022 |
|
|
adapter->tx_pcb.command = CMD_TRANSMIT_PACKET;
|
1023 |
|
|
adapter->tx_pcb.length = sizeof(struct Xmit_pkt);
|
1024 |
|
|
adapter->tx_pcb.data.xmit_pkt.buf_ofs
|
1025 |
|
|
= adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */
|
1026 |
|
|
adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen;
|
1027 |
|
|
|
1028 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb)) {
|
1029 |
|
|
adapter->busy = 0;
|
1030 |
|
|
return FALSE;
|
1031 |
|
|
}
|
1032 |
|
|
/* if this happens, we die */
|
1033 |
|
|
if (test_and_set_bit(0, (void *) &adapter->dmaing))
|
1034 |
|
|
printk("%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction);
|
1035 |
|
|
|
1036 |
|
|
adapter->current_dma.direction = 1;
|
1037 |
|
|
adapter->current_dma.start_time = jiffies;
|
1038 |
|
|
|
1039 |
|
|
if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) {
|
1040 |
|
|
memcpy(adapter->dma_buffer, skb->data, skb->len);
|
1041 |
|
|
memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len);
|
1042 |
|
|
target = virt_to_bus(adapter->dma_buffer);
|
1043 |
|
|
}
|
1044 |
|
|
else {
|
1045 |
|
|
target = virt_to_bus(skb->data);
|
1046 |
|
|
}
|
1047 |
|
|
adapter->current_dma.skb = skb;
|
1048 |
|
|
|
1049 |
|
|
flags=claim_dma_lock();
|
1050 |
|
|
disable_dma(dev->dma);
|
1051 |
|
|
clear_dma_ff(dev->dma);
|
1052 |
|
|
set_dma_mode(dev->dma, 0x48); /* dma memory -> io */
|
1053 |
|
|
set_dma_addr(dev->dma, target);
|
1054 |
|
|
set_dma_count(dev->dma, nlen);
|
1055 |
|
|
outb_control(adapter->hcr_val | DMAE | TCEN, dev);
|
1056 |
|
|
enable_dma(dev->dma);
|
1057 |
|
|
release_dma_lock(flags);
|
1058 |
|
|
|
1059 |
|
|
if (elp_debug >= 3)
|
1060 |
|
|
printk("%s: DMA transfer started\n", dev->name);
|
1061 |
|
|
|
1062 |
|
|
return TRUE;
|
1063 |
|
|
}
|
1064 |
|
|
|
1065 |
|
|
/*
|
1066 |
|
|
* The upper layer thinks we timed out
|
1067 |
|
|
*/
|
1068 |
|
|
|
1069 |
|
|
static void elp_timeout(struct net_device *dev)
|
1070 |
|
|
{
|
1071 |
|
|
elp_device *adapter = dev->priv;
|
1072 |
|
|
int stat;
|
1073 |
|
|
|
1074 |
|
|
stat = inb_status(dev->base_addr);
|
1075 |
|
|
printk(KERN_WARNING "%s: transmit timed out, lost %s?\n", dev->name, (stat & ACRF) ? "interrupt" : "command");
|
1076 |
|
|
if (elp_debug >= 1)
|
1077 |
|
|
printk("%s: status %#02x\n", dev->name, stat);
|
1078 |
|
|
dev->trans_start = jiffies;
|
1079 |
|
|
adapter->stats.tx_dropped++;
|
1080 |
|
|
netif_wake_queue(dev);
|
1081 |
|
|
}
|
1082 |
|
|
|
1083 |
|
|
/******************************************************
|
1084 |
|
|
*
|
1085 |
|
|
* start the transmitter
|
1086 |
|
|
* return 0 if sent OK, else return 1
|
1087 |
|
|
*
|
1088 |
|
|
******************************************************/
|
1089 |
|
|
|
1090 |
|
|
static int elp_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
1091 |
|
|
{
|
1092 |
|
|
unsigned long flags;
|
1093 |
|
|
elp_device *adapter = dev->priv;
|
1094 |
|
|
|
1095 |
|
|
spin_lock_irqsave(&adapter->lock, flags);
|
1096 |
|
|
check_3c505_dma(dev);
|
1097 |
|
|
|
1098 |
|
|
if (elp_debug >= 3)
|
1099 |
|
|
printk("%s: request to send packet of length %d\n", dev->name, (int) skb->len);
|
1100 |
|
|
|
1101 |
|
|
netif_stop_queue(dev);
|
1102 |
|
|
|
1103 |
|
|
/*
|
1104 |
|
|
* send the packet at skb->data for skb->len
|
1105 |
|
|
*/
|
1106 |
|
|
if (!send_packet(dev, skb)) {
|
1107 |
|
|
if (elp_debug >= 2) {
|
1108 |
|
|
printk("%s: failed to transmit packet\n", dev->name);
|
1109 |
|
|
}
|
1110 |
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
1111 |
|
|
return 1;
|
1112 |
|
|
}
|
1113 |
|
|
if (elp_debug >= 3)
|
1114 |
|
|
printk("%s: packet of length %d sent\n", dev->name, (int) skb->len);
|
1115 |
|
|
|
1116 |
|
|
/*
|
1117 |
|
|
* start the transmit timeout
|
1118 |
|
|
*/
|
1119 |
|
|
dev->trans_start = jiffies;
|
1120 |
|
|
|
1121 |
|
|
prime_rx(dev);
|
1122 |
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
1123 |
|
|
netif_start_queue(dev);
|
1124 |
|
|
return 0;
|
1125 |
|
|
}
|
1126 |
|
|
|
1127 |
|
|
/******************************************************
|
1128 |
|
|
*
|
1129 |
|
|
* return statistics on the board
|
1130 |
|
|
*
|
1131 |
|
|
******************************************************/
|
1132 |
|
|
|
1133 |
|
|
static struct net_device_stats *elp_get_stats(struct net_device *dev)
|
1134 |
|
|
{
|
1135 |
|
|
elp_device *adapter = (elp_device *) dev->priv;
|
1136 |
|
|
|
1137 |
|
|
if (elp_debug >= 3)
|
1138 |
|
|
printk("%s: request for stats\n", dev->name);
|
1139 |
|
|
|
1140 |
|
|
/* If the device is closed, just return the latest stats we have,
|
1141 |
|
|
- we cannot ask from the adapter without interrupts */
|
1142 |
|
|
if (!netif_running(dev))
|
1143 |
|
|
return &adapter->stats;
|
1144 |
|
|
|
1145 |
|
|
/* send a get statistics command to the board */
|
1146 |
|
|
adapter->tx_pcb.command = CMD_NETWORK_STATISTICS;
|
1147 |
|
|
adapter->tx_pcb.length = 0;
|
1148 |
|
|
adapter->got[CMD_NETWORK_STATISTICS] = 0;
|
1149 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
1150 |
|
|
printk("%s: couldn't send get statistics command\n", dev->name);
|
1151 |
|
|
else {
|
1152 |
|
|
int timeout = jiffies + TIMEOUT;
|
1153 |
|
|
while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout));
|
1154 |
|
|
if (time_after_eq(jiffies, timeout)) {
|
1155 |
|
|
TIMEOUT_MSG(__LINE__);
|
1156 |
|
|
return &adapter->stats;
|
1157 |
|
|
}
|
1158 |
|
|
}
|
1159 |
|
|
|
1160 |
|
|
/* statistics are now up to date */
|
1161 |
|
|
return &adapter->stats;
|
1162 |
|
|
}
|
1163 |
|
|
|
1164 |
|
|
/******************************************************
|
1165 |
|
|
*
|
1166 |
|
|
* close the board
|
1167 |
|
|
*
|
1168 |
|
|
******************************************************/
|
1169 |
|
|
|
1170 |
|
|
static int elp_close(struct net_device *dev)
|
1171 |
|
|
{
|
1172 |
|
|
elp_device *adapter;
|
1173 |
|
|
|
1174 |
|
|
adapter = dev->priv;
|
1175 |
|
|
|
1176 |
|
|
if (elp_debug >= 3)
|
1177 |
|
|
printk("%s: request to close device\n", dev->name);
|
1178 |
|
|
|
1179 |
|
|
netif_stop_queue(dev);
|
1180 |
|
|
|
1181 |
|
|
/* Someone may request the device statistic information even when
|
1182 |
|
|
* the interface is closed. The following will update the statistics
|
1183 |
|
|
* structure in the driver, so we'll be able to give current statistics.
|
1184 |
|
|
*/
|
1185 |
|
|
(void) elp_get_stats(dev);
|
1186 |
|
|
|
1187 |
|
|
/*
|
1188 |
|
|
* disable interrupts on the board
|
1189 |
|
|
*/
|
1190 |
|
|
outb_control(0, dev);
|
1191 |
|
|
|
1192 |
|
|
/*
|
1193 |
|
|
* release the IRQ
|
1194 |
|
|
*/
|
1195 |
|
|
free_irq(dev->irq, dev);
|
1196 |
|
|
|
1197 |
|
|
free_dma(dev->dma);
|
1198 |
|
|
free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE));
|
1199 |
|
|
|
1200 |
|
|
return 0;
|
1201 |
|
|
}
|
1202 |
|
|
|
1203 |
|
|
|
1204 |
|
|
/************************************************************
|
1205 |
|
|
*
|
1206 |
|
|
* Set multicast list
|
1207 |
|
|
* num_addrs==0: clear mc_list
|
1208 |
|
|
* num_addrs==-1: set promiscuous mode
|
1209 |
|
|
* num_addrs>0: set mc_list
|
1210 |
|
|
*
|
1211 |
|
|
************************************************************/
|
1212 |
|
|
|
1213 |
|
|
static void elp_set_mc_list(struct net_device *dev)
|
1214 |
|
|
{
|
1215 |
|
|
elp_device *adapter = (elp_device *) dev->priv;
|
1216 |
|
|
struct dev_mc_list *dmi = dev->mc_list;
|
1217 |
|
|
int i;
|
1218 |
|
|
unsigned long flags;
|
1219 |
|
|
|
1220 |
|
|
if (elp_debug >= 3)
|
1221 |
|
|
printk("%s: request to set multicast list\n", dev->name);
|
1222 |
|
|
|
1223 |
|
|
spin_lock_irqsave(&adapter->lock, flags);
|
1224 |
|
|
|
1225 |
|
|
if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
|
1226 |
|
|
/* send a "load multicast list" command to the board, max 10 addrs/cmd */
|
1227 |
|
|
/* if num_addrs==0 the list will be cleared */
|
1228 |
|
|
adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST;
|
1229 |
|
|
adapter->tx_pcb.length = 6 * dev->mc_count;
|
1230 |
|
|
for (i = 0; i < dev->mc_count; i++) {
|
1231 |
|
|
memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr, 6);
|
1232 |
|
|
dmi = dmi->next;
|
1233 |
|
|
}
|
1234 |
|
|
adapter->got[CMD_LOAD_MULTICAST_LIST] = 0;
|
1235 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
1236 |
|
|
printk("%s: couldn't send set_multicast command\n", dev->name);
|
1237 |
|
|
else {
|
1238 |
|
|
int timeout = jiffies + TIMEOUT;
|
1239 |
|
|
while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout));
|
1240 |
|
|
if (time_after_eq(jiffies, timeout)) {
|
1241 |
|
|
TIMEOUT_MSG(__LINE__);
|
1242 |
|
|
}
|
1243 |
|
|
}
|
1244 |
|
|
if (dev->mc_count)
|
1245 |
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI;
|
1246 |
|
|
else /* num_addrs == 0 */
|
1247 |
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
|
1248 |
|
|
} else
|
1249 |
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC;
|
1250 |
|
|
/*
|
1251 |
|
|
* configure adapter to receive messages (as specified above)
|
1252 |
|
|
* and wait for response
|
1253 |
|
|
*/
|
1254 |
|
|
if (elp_debug >= 3)
|
1255 |
|
|
printk("%s: sending 82586 configure command\n", dev->name);
|
1256 |
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_82586;
|
1257 |
|
|
adapter->tx_pcb.length = 2;
|
1258 |
|
|
adapter->got[CMD_CONFIGURE_82586] = 0;
|
1259 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
1260 |
|
|
{
|
1261 |
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
1262 |
|
|
printk("%s: couldn't send 82586 configure command\n", dev->name);
|
1263 |
|
|
}
|
1264 |
|
|
else {
|
1265 |
|
|
int timeout = jiffies + TIMEOUT;
|
1266 |
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
1267 |
|
|
while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
|
1268 |
|
|
if (time_after_eq(jiffies, timeout))
|
1269 |
|
|
TIMEOUT_MSG(__LINE__);
|
1270 |
|
|
}
|
1271 |
|
|
}
|
1272 |
|
|
|
1273 |
|
|
|
1274 |
|
|
static void netdev_get_drvinfo(struct net_device *dev,
|
1275 |
|
|
struct ethtool_drvinfo *info)
|
1276 |
|
|
{
|
1277 |
|
|
strcpy(info->driver, DRV_NAME);
|
1278 |
|
|
strcpy(info->version, DRV_VERSION);
|
1279 |
|
|
sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
|
1280 |
|
|
}
|
1281 |
|
|
|
1282 |
|
|
static u32 netdev_get_msglevel(struct net_device *dev)
|
1283 |
|
|
{
|
1284 |
|
|
return debug;
|
1285 |
|
|
}
|
1286 |
|
|
|
1287 |
|
|
static void netdev_set_msglevel(struct net_device *dev, u32 level)
|
1288 |
|
|
{
|
1289 |
|
|
debug = level;
|
1290 |
|
|
}
|
1291 |
|
|
|
1292 |
|
|
static struct ethtool_ops netdev_ethtool_ops = {
|
1293 |
|
|
.get_drvinfo = netdev_get_drvinfo,
|
1294 |
|
|
.get_msglevel = netdev_get_msglevel,
|
1295 |
|
|
.set_msglevel = netdev_set_msglevel,
|
1296 |
|
|
};
|
1297 |
|
|
|
1298 |
|
|
/******************************************************
|
1299 |
|
|
*
|
1300 |
|
|
* initialise Etherlink Plus board
|
1301 |
|
|
*
|
1302 |
|
|
******************************************************/
|
1303 |
|
|
|
1304 |
|
|
static inline void elp_init(struct net_device *dev)
|
1305 |
|
|
{
|
1306 |
|
|
elp_device *adapter = dev->priv;
|
1307 |
|
|
|
1308 |
|
|
/*
|
1309 |
|
|
* set ptrs to various functions
|
1310 |
|
|
*/
|
1311 |
|
|
dev->open = elp_open; /* local */
|
1312 |
|
|
dev->stop = elp_close; /* local */
|
1313 |
|
|
dev->get_stats = elp_get_stats; /* local */
|
1314 |
|
|
dev->hard_start_xmit = elp_start_xmit; /* local */
|
1315 |
|
|
dev->tx_timeout = elp_timeout; /* local */
|
1316 |
|
|
dev->watchdog_timeo = 10*HZ;
|
1317 |
|
|
dev->set_multicast_list = elp_set_mc_list; /* local */
|
1318 |
|
|
dev->ethtool_ops = &netdev_ethtool_ops; /* local */
|
1319 |
|
|
|
1320 |
|
|
/* Setup the generic properties */
|
1321 |
|
|
ether_setup(dev);
|
1322 |
|
|
|
1323 |
|
|
/*
|
1324 |
|
|
* setup ptr to adapter specific information
|
1325 |
|
|
*/
|
1326 |
|
|
memset(&(adapter->stats), 0, sizeof(struct net_device_stats));
|
1327 |
|
|
|
1328 |
|
|
/*
|
1329 |
|
|
* memory information
|
1330 |
|
|
*/
|
1331 |
|
|
dev->mem_start = dev->mem_end = dev->rmem_end = dev->rmem_start = 0;
|
1332 |
|
|
}
|
1333 |
|
|
|
1334 |
|
|
/************************************************************
|
1335 |
|
|
*
|
1336 |
|
|
* A couple of tests to see if there's 3C505 or not
|
1337 |
|
|
* Called only by elp_autodetect
|
1338 |
|
|
************************************************************/
|
1339 |
|
|
|
1340 |
|
|
static int __init elp_sense(struct net_device *dev)
|
1341 |
|
|
{
|
1342 |
|
|
int timeout;
|
1343 |
|
|
int addr = dev->base_addr;
|
1344 |
|
|
const char *name = dev->name;
|
1345 |
|
|
unsigned long flags;
|
1346 |
|
|
byte orig_HSR;
|
1347 |
|
|
|
1348 |
|
|
if (!request_region(addr, ELP_IO_EXTENT, "3c505"))
|
1349 |
|
|
return -ENODEV;
|
1350 |
|
|
|
1351 |
|
|
orig_HSR = inb_status(addr);
|
1352 |
|
|
|
1353 |
|
|
if (elp_debug > 0)
|
1354 |
|
|
printk(search_msg, name, addr);
|
1355 |
|
|
|
1356 |
|
|
if (orig_HSR == 0xff) {
|
1357 |
|
|
if (elp_debug > 0)
|
1358 |
|
|
printk(notfound_msg, 1);
|
1359 |
|
|
goto out;
|
1360 |
|
|
}
|
1361 |
|
|
/* Enable interrupts - we need timers! */
|
1362 |
|
|
save_flags(flags);
|
1363 |
|
|
sti();
|
1364 |
|
|
|
1365 |
|
|
/* Wait for a while; the adapter may still be booting up */
|
1366 |
|
|
if (elp_debug > 0)
|
1367 |
|
|
printk(stilllooking_msg);
|
1368 |
|
|
|
1369 |
|
|
if (orig_HSR & DIR) {
|
1370 |
|
|
/* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */
|
1371 |
|
|
outb(0, dev->base_addr + PORT_CONTROL);
|
1372 |
|
|
timeout = jiffies + 30*HZ/100;
|
1373 |
|
|
while (time_before(jiffies, timeout));
|
1374 |
|
|
restore_flags(flags);
|
1375 |
|
|
if (inb_status(addr) & DIR) {
|
1376 |
|
|
if (elp_debug > 0)
|
1377 |
|
|
printk(notfound_msg, 2);
|
1378 |
|
|
goto out;
|
1379 |
|
|
}
|
1380 |
|
|
} else {
|
1381 |
|
|
/* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */
|
1382 |
|
|
outb(DIR, dev->base_addr + PORT_CONTROL);
|
1383 |
|
|
timeout = jiffies + 30*HZ/100;
|
1384 |
|
|
while (time_before(jiffies, timeout));
|
1385 |
|
|
restore_flags(flags);
|
1386 |
|
|
if (!(inb_status(addr) & DIR)) {
|
1387 |
|
|
if (elp_debug > 0)
|
1388 |
|
|
printk(notfound_msg, 3);
|
1389 |
|
|
goto out;
|
1390 |
|
|
}
|
1391 |
|
|
}
|
1392 |
|
|
/*
|
1393 |
|
|
* It certainly looks like a 3c505.
|
1394 |
|
|
*/
|
1395 |
|
|
if (elp_debug > 0)
|
1396 |
|
|
printk(found_msg);
|
1397 |
|
|
|
1398 |
|
|
return 0;
|
1399 |
|
|
out:
|
1400 |
|
|
release_region(addr, ELP_IO_EXTENT);
|
1401 |
|
|
return -ENODEV;
|
1402 |
|
|
}
|
1403 |
|
|
|
1404 |
|
|
/*************************************************************
|
1405 |
|
|
*
|
1406 |
|
|
* Search through addr_list[] and try to find a 3C505
|
1407 |
|
|
* Called only by eplus_probe
|
1408 |
|
|
*************************************************************/
|
1409 |
|
|
|
1410 |
|
|
static int __init elp_autodetect(struct net_device *dev)
|
1411 |
|
|
{
|
1412 |
|
|
int idx = 0;
|
1413 |
|
|
|
1414 |
|
|
/* if base address set, then only check that address
|
1415 |
|
|
otherwise, run through the table */
|
1416 |
|
|
if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */
|
1417 |
|
|
if (elp_sense(dev) == 0)
|
1418 |
|
|
return dev->base_addr;
|
1419 |
|
|
} else
|
1420 |
|
|
while ((dev->base_addr = addr_list[idx++])) {
|
1421 |
|
|
if (elp_sense(dev) == 0)
|
1422 |
|
|
return dev->base_addr;
|
1423 |
|
|
}
|
1424 |
|
|
|
1425 |
|
|
/* could not find an adapter */
|
1426 |
|
|
if (elp_debug > 0)
|
1427 |
|
|
printk(couldnot_msg, dev->name);
|
1428 |
|
|
|
1429 |
|
|
return 0; /* Because of this, the layer above will return -ENODEV */
|
1430 |
|
|
}
|
1431 |
|
|
|
1432 |
|
|
|
1433 |
|
|
/******************************************************
|
1434 |
|
|
*
|
1435 |
|
|
* probe for an Etherlink Plus board at the specified address
|
1436 |
|
|
*
|
1437 |
|
|
******************************************************/
|
1438 |
|
|
|
1439 |
|
|
/* There are three situations we need to be able to detect here:
|
1440 |
|
|
|
1441 |
|
|
* a) the card is idle
|
1442 |
|
|
* b) the card is still booting up
|
1443 |
|
|
* c) the card is stuck in a strange state (some DOS drivers do this)
|
1444 |
|
|
*
|
1445 |
|
|
* In case (a), all is well. In case (b), we wait 10 seconds to see if the
|
1446 |
|
|
* card finishes booting, and carry on if so. In case (c), we do a hard reset,
|
1447 |
|
|
* loop round, and hope for the best.
|
1448 |
|
|
*
|
1449 |
|
|
* This is all very unpleasant, but hopefully avoids the problems with the old
|
1450 |
|
|
* probe code (which had a 15-second delay if the card was idle, and didn't
|
1451 |
|
|
* work at all if it was in a weird state).
|
1452 |
|
|
*/
|
1453 |
|
|
|
1454 |
|
|
int __init elplus_probe(struct net_device *dev)
|
1455 |
|
|
{
|
1456 |
|
|
elp_device *adapter;
|
1457 |
|
|
int i, tries, tries1, timeout, okay;
|
1458 |
|
|
unsigned long cookie = 0;
|
1459 |
|
|
|
1460 |
|
|
SET_MODULE_OWNER(dev);
|
1461 |
|
|
|
1462 |
|
|
/*
|
1463 |
|
|
* setup adapter structure
|
1464 |
|
|
*/
|
1465 |
|
|
|
1466 |
|
|
dev->base_addr = elp_autodetect(dev);
|
1467 |
|
|
if (!(dev->base_addr))
|
1468 |
|
|
return -ENODEV;
|
1469 |
|
|
|
1470 |
|
|
/*
|
1471 |
|
|
* setup ptr to adapter specific information
|
1472 |
|
|
*/
|
1473 |
|
|
adapter = (elp_device *) (dev->priv = kmalloc(sizeof(elp_device), GFP_KERNEL));
|
1474 |
|
|
if (adapter == NULL) {
|
1475 |
|
|
printk("%s: out of memory\n", dev->name);
|
1476 |
|
|
return -ENODEV;
|
1477 |
|
|
}
|
1478 |
|
|
|
1479 |
|
|
adapter->send_pcb_semaphore = 0;
|
1480 |
|
|
|
1481 |
|
|
for (tries1 = 0; tries1 < 3; tries1++) {
|
1482 |
|
|
outb_control((adapter->hcr_val | CMDE) & ~DIR, dev);
|
1483 |
|
|
/* First try to write just one byte, to see if the card is
|
1484 |
|
|
* responding at all normally.
|
1485 |
|
|
*/
|
1486 |
|
|
timeout = jiffies + 5*HZ/100;
|
1487 |
|
|
okay = 0;
|
1488 |
|
|
while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
|
1489 |
|
|
if ((inb_status(dev->base_addr) & HCRE)) {
|
1490 |
|
|
outb_command(0, dev->base_addr); /* send a spurious byte */
|
1491 |
|
|
timeout = jiffies + 5*HZ/100;
|
1492 |
|
|
while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
|
1493 |
|
|
if (inb_status(dev->base_addr) & HCRE)
|
1494 |
|
|
okay = 1;
|
1495 |
|
|
}
|
1496 |
|
|
if (!okay) {
|
1497 |
|
|
/* Nope, it's ignoring the command register. This means that
|
1498 |
|
|
* either it's still booting up, or it's died.
|
1499 |
|
|
*/
|
1500 |
|
|
printk("%s: command register wouldn't drain, ", dev->name);
|
1501 |
|
|
if ((inb_status(dev->base_addr) & 7) == 3) {
|
1502 |
|
|
/* If the adapter status is 3, it *could* still be booting.
|
1503 |
|
|
* Give it the benefit of the doubt for 10 seconds.
|
1504 |
|
|
*/
|
1505 |
|
|
printk("assuming 3c505 still starting\n");
|
1506 |
|
|
timeout = jiffies + 10*HZ;
|
1507 |
|
|
while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7));
|
1508 |
|
|
if (inb_status(dev->base_addr) & 7) {
|
1509 |
|
|
printk("%s: 3c505 failed to start\n", dev->name);
|
1510 |
|
|
} else {
|
1511 |
|
|
okay = 1; /* It started */
|
1512 |
|
|
}
|
1513 |
|
|
} else {
|
1514 |
|
|
/* Otherwise, it must just be in a strange
|
1515 |
|
|
* state. We probably need to kick it.
|
1516 |
|
|
*/
|
1517 |
|
|
printk("3c505 is sulking\n");
|
1518 |
|
|
}
|
1519 |
|
|
}
|
1520 |
|
|
for (tries = 0; tries < 5 && okay; tries++) {
|
1521 |
|
|
|
1522 |
|
|
/*
|
1523 |
|
|
* Try to set the Ethernet address, to make sure that the board
|
1524 |
|
|
* is working.
|
1525 |
|
|
*/
|
1526 |
|
|
adapter->tx_pcb.command = CMD_STATION_ADDRESS;
|
1527 |
|
|
adapter->tx_pcb.length = 0;
|
1528 |
|
|
cookie = probe_irq_on();
|
1529 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb)) {
|
1530 |
|
|
printk("%s: could not send first PCB\n", dev->name);
|
1531 |
|
|
probe_irq_off(cookie);
|
1532 |
|
|
continue;
|
1533 |
|
|
}
|
1534 |
|
|
if (!receive_pcb(dev, &adapter->rx_pcb)) {
|
1535 |
|
|
printk("%s: could not read first PCB\n", dev->name);
|
1536 |
|
|
probe_irq_off(cookie);
|
1537 |
|
|
continue;
|
1538 |
|
|
}
|
1539 |
|
|
if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) ||
|
1540 |
|
|
(adapter->rx_pcb.length != 6)) {
|
1541 |
|
|
printk("%s: first PCB wrong (%d, %d)\n", dev->name, adapter->rx_pcb.command, adapter->rx_pcb.length);
|
1542 |
|
|
probe_irq_off(cookie);
|
1543 |
|
|
continue;
|
1544 |
|
|
}
|
1545 |
|
|
goto okay;
|
1546 |
|
|
}
|
1547 |
|
|
/* It's broken. Do a hard reset to re-initialise the board,
|
1548 |
|
|
* and try again.
|
1549 |
|
|
*/
|
1550 |
|
|
printk(KERN_INFO "%s: resetting adapter\n", dev->name);
|
1551 |
|
|
outb_control(adapter->hcr_val | FLSH | ATTN, dev);
|
1552 |
|
|
outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev);
|
1553 |
|
|
}
|
1554 |
|
|
printk("%s: failed to initialise 3c505\n", dev->name);
|
1555 |
|
|
release_region(dev->base_addr, ELP_IO_EXTENT);
|
1556 |
|
|
return -ENODEV;
|
1557 |
|
|
|
1558 |
|
|
okay:
|
1559 |
|
|
if (dev->irq) { /* Is there a preset IRQ? */
|
1560 |
|
|
int rpt = probe_irq_off(cookie);
|
1561 |
|
|
if (dev->irq != rpt) {
|
1562 |
|
|
printk("%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt);
|
1563 |
|
|
}
|
1564 |
|
|
/* if dev->irq == probe_irq_off(cookie), all is well */
|
1565 |
|
|
} else /* No preset IRQ; just use what we can detect */
|
1566 |
|
|
dev->irq = probe_irq_off(cookie);
|
1567 |
|
|
switch (dev->irq) { /* Legal, sane? */
|
1568 |
|
|
case 0:
|
1569 |
|
|
printk("%s: IRQ probe failed: check 3c505 jumpers.\n",
|
1570 |
|
|
dev->name);
|
1571 |
|
|
return -ENODEV;
|
1572 |
|
|
case 1:
|
1573 |
|
|
case 6:
|
1574 |
|
|
case 8:
|
1575 |
|
|
case 13:
|
1576 |
|
|
printk("%s: Impossible IRQ %d reported by probe_irq_off().\n",
|
1577 |
|
|
dev->name, dev->irq);
|
1578 |
|
|
return -ENODEV;
|
1579 |
|
|
}
|
1580 |
|
|
/*
|
1581 |
|
|
* Now we have the IRQ number so we can disable the interrupts from
|
1582 |
|
|
* the board until the board is opened.
|
1583 |
|
|
*/
|
1584 |
|
|
outb_control(adapter->hcr_val & ~CMDE, dev);
|
1585 |
|
|
|
1586 |
|
|
/*
|
1587 |
|
|
* copy Ethernet address into structure
|
1588 |
|
|
*/
|
1589 |
|
|
for (i = 0; i < 6; i++)
|
1590 |
|
|
dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i];
|
1591 |
|
|
|
1592 |
|
|
/* find a DMA channel */
|
1593 |
|
|
if (!dev->dma) {
|
1594 |
|
|
if (dev->mem_start) {
|
1595 |
|
|
dev->dma = dev->mem_start & 7;
|
1596 |
|
|
}
|
1597 |
|
|
else {
|
1598 |
|
|
printk(KERN_WARNING "%s: warning, DMA channel not specified, using default\n", dev->name);
|
1599 |
|
|
dev->dma = ELP_DMA;
|
1600 |
|
|
}
|
1601 |
|
|
}
|
1602 |
|
|
|
1603 |
|
|
/*
|
1604 |
|
|
* print remainder of startup message
|
1605 |
|
|
*/
|
1606 |
|
|
printk("%s: 3c505 at %#lx, irq %d, dma %d, ",
|
1607 |
|
|
dev->name, dev->base_addr, dev->irq, dev->dma);
|
1608 |
|
|
printk("addr %02x:%02x:%02x:%02x:%02x:%02x, ",
|
1609 |
|
|
dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
|
1610 |
|
|
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
|
1611 |
|
|
|
1612 |
|
|
/*
|
1613 |
|
|
* read more information from the adapter
|
1614 |
|
|
*/
|
1615 |
|
|
|
1616 |
|
|
adapter->tx_pcb.command = CMD_ADAPTER_INFO;
|
1617 |
|
|
adapter->tx_pcb.length = 0;
|
1618 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb) ||
|
1619 |
|
|
!receive_pcb(dev, &adapter->rx_pcb) ||
|
1620 |
|
|
(adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) ||
|
1621 |
|
|
(adapter->rx_pcb.length != 10)) {
|
1622 |
|
|
printk("not responding to second PCB\n");
|
1623 |
|
|
}
|
1624 |
|
|
printk("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers, adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz);
|
1625 |
|
|
|
1626 |
|
|
/*
|
1627 |
|
|
* reconfigure the adapter memory to better suit our purposes
|
1628 |
|
|
*/
|
1629 |
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
|
1630 |
|
|
adapter->tx_pcb.length = 12;
|
1631 |
|
|
adapter->tx_pcb.data.memconf.cmd_q = 8;
|
1632 |
|
|
adapter->tx_pcb.data.memconf.rcv_q = 8;
|
1633 |
|
|
adapter->tx_pcb.data.memconf.mcast = 10;
|
1634 |
|
|
adapter->tx_pcb.data.memconf.frame = 10;
|
1635 |
|
|
adapter->tx_pcb.data.memconf.rcv_b = 10;
|
1636 |
|
|
adapter->tx_pcb.data.memconf.progs = 0;
|
1637 |
|
|
if (!send_pcb(dev, &adapter->tx_pcb) ||
|
1638 |
|
|
!receive_pcb(dev, &adapter->rx_pcb) ||
|
1639 |
|
|
(adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) ||
|
1640 |
|
|
(adapter->rx_pcb.length != 2)) {
|
1641 |
|
|
printk("%s: could not configure adapter memory\n", dev->name);
|
1642 |
|
|
}
|
1643 |
|
|
if (adapter->rx_pcb.data.configure) {
|
1644 |
|
|
printk("%s: adapter configuration failed\n", dev->name);
|
1645 |
|
|
}
|
1646 |
|
|
|
1647 |
|
|
/*
|
1648 |
|
|
* initialise the device
|
1649 |
|
|
*/
|
1650 |
|
|
elp_init(dev);
|
1651 |
|
|
|
1652 |
|
|
return 0;
|
1653 |
|
|
}
|
1654 |
|
|
|
1655 |
|
|
#ifdef MODULE
|
1656 |
|
|
static struct net_device dev_3c505[ELP_MAX_CARDS];
|
1657 |
|
|
static int io[ELP_MAX_CARDS];
|
1658 |
|
|
static int irq[ELP_MAX_CARDS];
|
1659 |
|
|
static int dma[ELP_MAX_CARDS];
|
1660 |
|
|
MODULE_PARM(io, "1-" __MODULE_STRING(ELP_MAX_CARDS) "i");
|
1661 |
|
|
MODULE_PARM(irq, "1-" __MODULE_STRING(ELP_MAX_CARDS) "i");
|
1662 |
|
|
MODULE_PARM(dma, "1-" __MODULE_STRING(ELP_MAX_CARDS) "i");
|
1663 |
|
|
MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)");
|
1664 |
|
|
MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)");
|
1665 |
|
|
MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)");
|
1666 |
|
|
|
1667 |
|
|
int init_module(void)
|
1668 |
|
|
{
|
1669 |
|
|
int this_dev, found = 0;
|
1670 |
|
|
|
1671 |
|
|
for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
|
1672 |
|
|
struct net_device *dev = &dev_3c505[this_dev];
|
1673 |
|
|
dev->irq = irq[this_dev];
|
1674 |
|
|
dev->base_addr = io[this_dev];
|
1675 |
|
|
dev->init = elplus_probe;
|
1676 |
|
|
if (dma[this_dev]) {
|
1677 |
|
|
dev->dma = dma[this_dev];
|
1678 |
|
|
} else {
|
1679 |
|
|
dev->dma = ELP_DMA;
|
1680 |
|
|
printk(KERN_WARNING "3c505.c: warning, using default DMA channel,\n");
|
1681 |
|
|
}
|
1682 |
|
|
if (io[this_dev] == 0) {
|
1683 |
|
|
if (this_dev) break;
|
1684 |
|
|
printk(KERN_NOTICE "3c505.c: module autoprobe not recommended, give io=xx.\n");
|
1685 |
|
|
}
|
1686 |
|
|
if (register_netdev(dev) != 0) {
|
1687 |
|
|
printk(KERN_WARNING "3c505.c: Failed to register card at 0x%x.\n", io[this_dev]);
|
1688 |
|
|
if (found != 0) return 0;
|
1689 |
|
|
return -ENXIO;
|
1690 |
|
|
}
|
1691 |
|
|
found++;
|
1692 |
|
|
}
|
1693 |
|
|
return 0;
|
1694 |
|
|
}
|
1695 |
|
|
|
1696 |
|
|
void cleanup_module(void)
|
1697 |
|
|
{
|
1698 |
|
|
int this_dev;
|
1699 |
|
|
|
1700 |
|
|
for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
|
1701 |
|
|
struct net_device *dev = &dev_3c505[this_dev];
|
1702 |
|
|
if (dev->priv != NULL) {
|
1703 |
|
|
unregister_netdev(dev);
|
1704 |
|
|
kfree(dev->priv);
|
1705 |
|
|
dev->priv = NULL;
|
1706 |
|
|
release_region(dev->base_addr, ELP_IO_EXTENT);
|
1707 |
|
|
}
|
1708 |
|
|
}
|
1709 |
|
|
}
|
1710 |
|
|
|
1711 |
|
|
#endif /* MODULE */
|
1712 |
|
|
MODULE_LICENSE("GPL");
|