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27a1de95a1
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1679 lines
48 KiB
C
1679 lines
48 KiB
C
/*
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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 1.10 1996/04/16 13:06:27 phil 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 <philb@gnu.org>
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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/string.h>
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#include <linux/interrupt.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 <linux/delay.h>
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#include <linux/bitops.h>
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#include <asm/uaccess.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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#define filename __FILE__
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#define timeout_msg "*** timeout at %s:%s (line %d) ***\n"
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#define TIMEOUT_MSG(lineno) \
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pr_notice(timeout_msg, filename, __func__, (lineno))
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#define invalid_pcb_msg "*** invalid pcb length %d at %s:%s (line %d) ***\n"
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#define INVALID_PCB_MSG(len) \
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pr_notice(invalid_pcb_msg, (len), filename, __func__, __LINE__)
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#define search_msg "%s: Looking for 3c505 adapter at address %#x..."
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#define stilllooking_msg "still looking..."
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#define found_msg "found.\n"
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#define notfound_msg "not found (reason = %d)\n"
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#define couldnot_msg "%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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* 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 *)(netdev_priv(dev)))->hcr_val = val;
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}
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#define HCR_VAL(x) (((elp_device *)(netdev_priv(x)))->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 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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unsigned long 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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elp_device *adapter = netdev_priv(dev);
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unsigned long flags;
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spin_lock_irqsave(&adapter->lock, flags);
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outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev);
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spin_unlock_irqrestore(&adapter->lock, flags);
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}
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static bool start_receive(struct net_device *, pcb_struct *);
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static inline void adapter_reset(struct net_device *dev)
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{
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unsigned long timeout;
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elp_device *adapter = netdev_priv(dev);
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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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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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} while (inb_status(dev->base_addr) & ACRF);
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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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mdelay(10);
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outb_control(adapter->hcr_val & ~ATTN, dev);
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mdelay(10);
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outb_control(adapter->hcr_val | FLSH, dev);
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mdelay(10);
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outb_control(adapter->hcr_val & ~FLSH, dev);
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mdelay(10);
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outb_control(orig_hcr, dev);
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if (!start_receive(dev, &adapter->tx_pcb))
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pr_err("%s: start receive command failed\n", dev->name);
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}
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/* Check to make sure that a DMA transfer hasn't timed out. This should
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* never happen in theory, but seems to occur occasionally if the card gets
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* prodded at the wrong time.
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*/
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static inline void check_3c505_dma(struct net_device *dev)
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{
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elp_device *adapter = netdev_priv(dev);
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if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) {
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unsigned long flags, f;
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pr_err("%s: DMA %s timed out, %d bytes left\n", dev->name,
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adapter->current_dma.direction ? "download" : "upload",
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get_dma_residue(dev->dma));
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spin_lock_irqsave(&adapter->lock, flags);
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adapter->dmaing = 0;
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adapter->busy = 0;
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f=claim_dma_lock();
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disable_dma(dev->dma);
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release_dma_lock(f);
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if (adapter->rx_active)
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adapter->rx_active--;
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outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
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spin_unlock_irqrestore(&adapter->lock, flags);
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}
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}
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/* Primitive functions used by send_pcb() */
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static inline bool send_pcb_slow(unsigned int base_addr, unsigned char byte)
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{
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unsigned long timeout;
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outb_command(byte, base_addr);
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for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
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if (inb_status(base_addr) & HCRE)
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return false;
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}
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pr_warning("3c505: send_pcb_slow timed out\n");
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return true;
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}
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static inline bool send_pcb_fast(unsigned int base_addr, unsigned char byte)
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{
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unsigned int timeout;
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outb_command(byte, base_addr);
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for (timeout = 0; timeout < 40000; timeout++) {
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if (inb_status(base_addr) & HCRE)
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return false;
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}
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pr_warning("3c505: send_pcb_fast timed out\n");
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return true;
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}
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|
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/* Check to see if the receiver needs restarting, and kick it if so */
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static inline void prime_rx(struct net_device *dev)
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{
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elp_device *adapter = netdev_priv(dev);
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while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) {
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if (!start_receive(dev, &adapter->itx_pcb))
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break;
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}
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}
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/*****************************************************************
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*
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* send_pcb
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* Send a PCB to the adapter.
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*
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* output byte to command reg --<--+
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* wait until HCRE is non zero |
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* loop until all bytes sent -->--+
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* set HSF1 and HSF2 to 1
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* output pcb length
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* wait until ASF give ACK or NAK
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* set HSF1 and HSF2 to 0
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*
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*****************************************************************/
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/* This can be quite slow -- the adapter is allowed to take up to 40ms
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* to respond to the initial interrupt.
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*
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* We run initially with interrupts turned on, but with a semaphore set
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* so that nobody tries to re-enter this code. Once the first byte has
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* gone through, we turn interrupts off and then send the others (the
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* timeout is reduced to 500us).
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*/
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|
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static bool send_pcb(struct net_device *dev, pcb_struct * pcb)
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{
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int i;
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unsigned long timeout;
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elp_device *adapter = netdev_priv(dev);
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unsigned long flags;
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|
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check_3c505_dma(dev);
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|
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if (adapter->dmaing && adapter->current_dma.direction == 0)
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return false;
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|
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/* Avoid contention */
|
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if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) {
|
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if (elp_debug >= 3) {
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pr_debug("%s: send_pcb entered while threaded\n", dev->name);
|
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}
|
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return false;
|
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}
|
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/*
|
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* load each byte into the command register and
|
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* wait for the HCRE bit to indicate the adapter
|
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* had read the byte
|
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*/
|
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set_hsf(dev, 0);
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|
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if (send_pcb_slow(dev->base_addr, pcb->command))
|
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goto abort;
|
|
|
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spin_lock_irqsave(&adapter->lock, flags);
|
|
|
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if (send_pcb_fast(dev->base_addr, pcb->length))
|
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goto sti_abort;
|
|
|
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for (i = 0; i < pcb->length; i++) {
|
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if (send_pcb_fast(dev->base_addr, pcb->data.raw[i]))
|
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goto sti_abort;
|
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}
|
|
|
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outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */
|
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outb_command(2 + pcb->length, dev->base_addr);
|
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|
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/* now wait for the acknowledgement */
|
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spin_unlock_irqrestore(&adapter->lock, flags);
|
|
|
|
for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) {
|
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switch (GET_ASF(dev->base_addr)) {
|
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case ASF_PCB_ACK:
|
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adapter->send_pcb_semaphore = 0;
|
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return true;
|
|
|
|
case ASF_PCB_NAK:
|
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#ifdef ELP_DEBUG
|
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pr_debug("%s: send_pcb got NAK\n", dev->name);
|
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#endif
|
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goto abort;
|
|
}
|
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}
|
|
|
|
if (elp_debug >= 1)
|
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pr_debug("%s: timeout waiting for PCB acknowledge (status %02x)\n",
|
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dev->name, inb_status(dev->base_addr));
|
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goto abort;
|
|
|
|
sti_abort:
|
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spin_unlock_irqrestore(&adapter->lock, flags);
|
|
abort:
|
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adapter->send_pcb_semaphore = 0;
|
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return false;
|
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}
|
|
|
|
|
|
/*****************************************************************
|
|
*
|
|
* receive_pcb
|
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* Read a PCB from the adapter
|
|
*
|
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* wait for ACRF to be non-zero ---<---+
|
|
* input a byte |
|
|
* if ASF1 and ASF2 were not both one |
|
|
* before byte was read, loop --->---+
|
|
* set HSF1 and HSF2 for ack
|
|
*
|
|
*****************************************************************/
|
|
|
|
static bool receive_pcb(struct net_device *dev, pcb_struct * pcb)
|
|
{
|
|
int i, j;
|
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int total_length;
|
|
int stat;
|
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unsigned long timeout;
|
|
unsigned long flags;
|
|
|
|
elp_device *adapter = netdev_priv(dev);
|
|
|
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set_hsf(dev, 0);
|
|
|
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/* get the command code */
|
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timeout = jiffies + 2*HZ/100;
|
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while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
|
|
if (time_after_eq(jiffies, timeout)) {
|
|
TIMEOUT_MSG(__LINE__);
|
|
return false;
|
|
}
|
|
pcb->command = inb_command(dev->base_addr);
|
|
|
|
/* read the data length */
|
|
timeout = jiffies + 3*HZ/100;
|
|
while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout));
|
|
if (time_after_eq(jiffies, timeout)) {
|
|
TIMEOUT_MSG(__LINE__);
|
|
pr_info("%s: status %02x\n", dev->name, stat);
|
|
return false;
|
|
}
|
|
pcb->length = inb_command(dev->base_addr);
|
|
|
|
if (pcb->length > MAX_PCB_DATA) {
|
|
INVALID_PCB_MSG(pcb->length);
|
|
adapter_reset(dev);
|
|
return false;
|
|
}
|
|
/* read the data */
|
|
spin_lock_irqsave(&adapter->lock, flags);
|
|
for (i = 0; i < MAX_PCB_DATA; i++) {
|
|
for (j = 0; j < 20000; j++) {
|
|
stat = get_status(dev->base_addr);
|
|
if (stat & ACRF)
|
|
break;
|
|
}
|
|
pcb->data.raw[i] = inb_command(dev->base_addr);
|
|
if ((stat & ASF_PCB_MASK) == ASF_PCB_END || j >= 20000)
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
|
if (i >= MAX_PCB_DATA) {
|
|
INVALID_PCB_MSG(i);
|
|
return false;
|
|
}
|
|
if (j >= 20000) {
|
|
TIMEOUT_MSG(__LINE__);
|
|
return false;
|
|
}
|
|
/* the last "data" byte was really the length! */
|
|
total_length = pcb->data.raw[i];
|
|
|
|
/* safety check total length vs data length */
|
|
if (total_length != (pcb->length + 2)) {
|
|
if (elp_debug >= 2)
|
|
pr_warning("%s: mangled PCB received\n", dev->name);
|
|
set_hsf(dev, HSF_PCB_NAK);
|
|
return false;
|
|
}
|
|
|
|
if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) {
|
|
if (test_and_set_bit(0, (void *) &adapter->busy)) {
|
|
if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) {
|
|
set_hsf(dev, HSF_PCB_NAK);
|
|
pr_warning("%s: PCB rejected, transfer in progress and backlog full\n", dev->name);
|
|
pcb->command = 0;
|
|
return true;
|
|
} else {
|
|
pcb->command = 0xff;
|
|
}
|
|
}
|
|
}
|
|
set_hsf(dev, HSF_PCB_ACK);
|
|
return true;
|
|
}
|
|
|
|
/******************************************************
|
|
*
|
|
* queue a receive command on the adapter so we will get an
|
|
* interrupt when a packet is received.
|
|
*
|
|
******************************************************/
|
|
|
|
static bool start_receive(struct net_device *dev, pcb_struct * tx_pcb)
|
|
{
|
|
bool status;
|
|
elp_device *adapter = netdev_priv(dev);
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: restarting receiver\n", dev->name);
|
|
tx_pcb->command = CMD_RECEIVE_PACKET;
|
|
tx_pcb->length = sizeof(struct Rcv_pkt);
|
|
tx_pcb->data.rcv_pkt.buf_seg
|
|
= tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */
|
|
tx_pcb->data.rcv_pkt.buf_len = 1600;
|
|
tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */
|
|
status = send_pcb(dev, tx_pcb);
|
|
if (status)
|
|
adapter->rx_active++;
|
|
return status;
|
|
}
|
|
|
|
/******************************************************
|
|
*
|
|
* extract a packet from the adapter
|
|
* this routine is only called from within the interrupt
|
|
* service routine, so no cli/sti calls are needed
|
|
* note that the length is always assumed to be even
|
|
*
|
|
******************************************************/
|
|
|
|
static void receive_packet(struct net_device *dev, int len)
|
|
{
|
|
int rlen;
|
|
elp_device *adapter = netdev_priv(dev);
|
|
void *target;
|
|
struct sk_buff *skb;
|
|
unsigned long flags;
|
|
|
|
rlen = (len + 1) & ~1;
|
|
skb = dev_alloc_skb(rlen + 2);
|
|
|
|
if (!skb) {
|
|
pr_warning("%s: memory squeeze, dropping packet\n", dev->name);
|
|
target = adapter->dma_buffer;
|
|
adapter->current_dma.target = NULL;
|
|
/* FIXME: stats */
|
|
return;
|
|
}
|
|
|
|
skb_reserve(skb, 2);
|
|
target = skb_put(skb, rlen);
|
|
if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) {
|
|
adapter->current_dma.target = target;
|
|
target = adapter->dma_buffer;
|
|
} else {
|
|
adapter->current_dma.target = NULL;
|
|
}
|
|
|
|
/* if this happens, we die */
|
|
if (test_and_set_bit(0, (void *) &adapter->dmaing))
|
|
pr_err("%s: rx blocked, DMA in progress, dir %d\n",
|
|
dev->name, adapter->current_dma.direction);
|
|
|
|
adapter->current_dma.direction = 0;
|
|
adapter->current_dma.length = rlen;
|
|
adapter->current_dma.skb = skb;
|
|
adapter->current_dma.start_time = jiffies;
|
|
|
|
outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev);
|
|
|
|
flags=claim_dma_lock();
|
|
disable_dma(dev->dma);
|
|
clear_dma_ff(dev->dma);
|
|
set_dma_mode(dev->dma, 0x04); /* dma read */
|
|
set_dma_addr(dev->dma, isa_virt_to_bus(target));
|
|
set_dma_count(dev->dma, rlen);
|
|
enable_dma(dev->dma);
|
|
release_dma_lock(flags);
|
|
|
|
if (elp_debug >= 3) {
|
|
pr_debug("%s: rx DMA transfer started\n", dev->name);
|
|
}
|
|
|
|
if (adapter->rx_active)
|
|
adapter->rx_active--;
|
|
|
|
if (!adapter->busy)
|
|
pr_warning("%s: receive_packet called, busy not set.\n", dev->name);
|
|
}
|
|
|
|
/******************************************************
|
|
*
|
|
* interrupt handler
|
|
*
|
|
******************************************************/
|
|
|
|
static irqreturn_t elp_interrupt(int irq, void *dev_id)
|
|
{
|
|
int len;
|
|
int dlen;
|
|
int icount = 0;
|
|
struct net_device *dev = dev_id;
|
|
elp_device *adapter = netdev_priv(dev);
|
|
unsigned long timeout;
|
|
|
|
spin_lock(&adapter->lock);
|
|
|
|
do {
|
|
/*
|
|
* has a DMA transfer finished?
|
|
*/
|
|
if (inb_status(dev->base_addr) & DONE) {
|
|
if (!adapter->dmaing)
|
|
pr_warning("%s: phantom DMA completed\n", dev->name);
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: %s DMA complete, status %02x\n", dev->name,
|
|
adapter->current_dma.direction ? "tx" : "rx",
|
|
inb_status(dev->base_addr));
|
|
|
|
outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
|
|
if (adapter->current_dma.direction) {
|
|
dev_kfree_skb_irq(adapter->current_dma.skb);
|
|
} else {
|
|
struct sk_buff *skb = adapter->current_dma.skb;
|
|
if (skb) {
|
|
if (adapter->current_dma.target) {
|
|
/* have already done the skb_put() */
|
|
memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length);
|
|
}
|
|
skb->protocol = eth_type_trans(skb,dev);
|
|
dev->stats.rx_bytes += skb->len;
|
|
netif_rx(skb);
|
|
}
|
|
}
|
|
adapter->dmaing = 0;
|
|
if (adapter->rx_backlog.in != adapter->rx_backlog.out) {
|
|
int t = adapter->rx_backlog.length[adapter->rx_backlog.out];
|
|
adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out);
|
|
if (elp_debug >= 2)
|
|
pr_debug("%s: receiving backlogged packet (%d)\n", dev->name, t);
|
|
receive_packet(dev, t);
|
|
} else {
|
|
adapter->busy = 0;
|
|
}
|
|
} else {
|
|
/* has one timed out? */
|
|
check_3c505_dma(dev);
|
|
}
|
|
|
|
/*
|
|
* receive a PCB from the adapter
|
|
*/
|
|
timeout = jiffies + 3*HZ/100;
|
|
while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) {
|
|
if (receive_pcb(dev, &adapter->irx_pcb)) {
|
|
switch (adapter->irx_pcb.command)
|
|
{
|
|
case 0:
|
|
break;
|
|
/*
|
|
* received a packet - this must be handled fast
|
|
*/
|
|
case 0xff:
|
|
case CMD_RECEIVE_PACKET_COMPLETE:
|
|
/* if the device isn't open, don't pass packets up the stack */
|
|
if (!netif_running(dev))
|
|
break;
|
|
len = adapter->irx_pcb.data.rcv_resp.pkt_len;
|
|
dlen = adapter->irx_pcb.data.rcv_resp.buf_len;
|
|
if (adapter->irx_pcb.data.rcv_resp.timeout != 0) {
|
|
pr_err("%s: interrupt - packet not received correctly\n", dev->name);
|
|
} else {
|
|
if (elp_debug >= 3) {
|
|
pr_debug("%s: interrupt - packet received of length %i (%i)\n",
|
|
dev->name, len, dlen);
|
|
}
|
|
if (adapter->irx_pcb.command == 0xff) {
|
|
if (elp_debug >= 2)
|
|
pr_debug("%s: adding packet to backlog (len = %d)\n",
|
|
dev->name, dlen);
|
|
adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen;
|
|
adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in);
|
|
} else {
|
|
receive_packet(dev, dlen);
|
|
}
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: packet received\n", dev->name);
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* 82586 configured correctly
|
|
*/
|
|
case CMD_CONFIGURE_82586_RESPONSE:
|
|
adapter->got[CMD_CONFIGURE_82586] = 1;
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: interrupt - configure response received\n", dev->name);
|
|
break;
|
|
|
|
/*
|
|
* Adapter memory configuration
|
|
*/
|
|
case CMD_CONFIGURE_ADAPTER_RESPONSE:
|
|
adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1;
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: Adapter memory configuration %s.\n", dev->name,
|
|
adapter->irx_pcb.data.failed ? "failed" : "succeeded");
|
|
break;
|
|
|
|
/*
|
|
* Multicast list loading
|
|
*/
|
|
case CMD_LOAD_MULTICAST_RESPONSE:
|
|
adapter->got[CMD_LOAD_MULTICAST_LIST] = 1;
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: Multicast address list loading %s.\n", dev->name,
|
|
adapter->irx_pcb.data.failed ? "failed" : "succeeded");
|
|
break;
|
|
|
|
/*
|
|
* Station address setting
|
|
*/
|
|
case CMD_SET_ADDRESS_RESPONSE:
|
|
adapter->got[CMD_SET_STATION_ADDRESS] = 1;
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: Ethernet address setting %s.\n", dev->name,
|
|
adapter->irx_pcb.data.failed ? "failed" : "succeeded");
|
|
break;
|
|
|
|
|
|
/*
|
|
* received board statistics
|
|
*/
|
|
case CMD_NETWORK_STATISTICS_RESPONSE:
|
|
dev->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv;
|
|
dev->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit;
|
|
dev->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC;
|
|
dev->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align;
|
|
dev->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun;
|
|
dev->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res;
|
|
adapter->got[CMD_NETWORK_STATISTICS] = 1;
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: interrupt - statistics response received\n", dev->name);
|
|
break;
|
|
|
|
/*
|
|
* sent a packet
|
|
*/
|
|
case CMD_TRANSMIT_PACKET_COMPLETE:
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: interrupt - packet sent\n", dev->name);
|
|
if (!netif_running(dev))
|
|
break;
|
|
switch (adapter->irx_pcb.data.xmit_resp.c_stat) {
|
|
case 0xffff:
|
|
dev->stats.tx_aborted_errors++;
|
|
pr_info("%s: transmit timed out, network cable problem?\n", dev->name);
|
|
break;
|
|
case 0xfffe:
|
|
dev->stats.tx_fifo_errors++;
|
|
pr_info("%s: transmit timed out, FIFO underrun\n", dev->name);
|
|
break;
|
|
}
|
|
netif_wake_queue(dev);
|
|
break;
|
|
|
|
/*
|
|
* some unknown PCB
|
|
*/
|
|
default:
|
|
pr_debug("%s: unknown PCB received - %2.2x\n",
|
|
dev->name, adapter->irx_pcb.command);
|
|
break;
|
|
}
|
|
} else {
|
|
pr_warning("%s: failed to read PCB on interrupt\n", dev->name);
|
|
adapter_reset(dev);
|
|
}
|
|
}
|
|
|
|
} while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE)));
|
|
|
|
prime_rx(dev);
|
|
|
|
/*
|
|
* indicate no longer in interrupt routine
|
|
*/
|
|
spin_unlock(&adapter->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
*
|
|
* open the board
|
|
*
|
|
******************************************************/
|
|
|
|
static int elp_open(struct net_device *dev)
|
|
{
|
|
elp_device *adapter = netdev_priv(dev);
|
|
int retval;
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: request to open device\n", dev->name);
|
|
|
|
/*
|
|
* make sure we actually found the device
|
|
*/
|
|
if (adapter == NULL) {
|
|
pr_err("%s: Opening a non-existent physical device\n", dev->name);
|
|
return -EAGAIN;
|
|
}
|
|
/*
|
|
* disable interrupts on the board
|
|
*/
|
|
outb_control(0, dev);
|
|
|
|
/*
|
|
* clear any pending interrupts
|
|
*/
|
|
inb_command(dev->base_addr);
|
|
adapter_reset(dev);
|
|
|
|
/*
|
|
* no receive PCBs active
|
|
*/
|
|
adapter->rx_active = 0;
|
|
|
|
adapter->busy = 0;
|
|
adapter->send_pcb_semaphore = 0;
|
|
adapter->rx_backlog.in = 0;
|
|
adapter->rx_backlog.out = 0;
|
|
|
|
spin_lock_init(&adapter->lock);
|
|
|
|
/*
|
|
* install our interrupt service routine
|
|
*/
|
|
if ((retval = request_irq(dev->irq, &elp_interrupt, 0, dev->name, dev))) {
|
|
pr_err("%s: could not allocate IRQ%d\n", dev->name, dev->irq);
|
|
return retval;
|
|
}
|
|
if ((retval = request_dma(dev->dma, dev->name))) {
|
|
free_irq(dev->irq, dev);
|
|
pr_err("%s: could not allocate DMA%d channel\n", dev->name, dev->dma);
|
|
return retval;
|
|
}
|
|
adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE);
|
|
if (!adapter->dma_buffer) {
|
|
pr_err("%s: could not allocate DMA buffer\n", dev->name);
|
|
free_dma(dev->dma);
|
|
free_irq(dev->irq, dev);
|
|
return -ENOMEM;
|
|
}
|
|
adapter->dmaing = 0;
|
|
|
|
/*
|
|
* enable interrupts on the board
|
|
*/
|
|
outb_control(CMDE, dev);
|
|
|
|
/*
|
|
* configure adapter memory: we need 10 multicast addresses, default==0
|
|
*/
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: sending 3c505 memory configuration command\n", dev->name);
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
|
|
adapter->tx_pcb.data.memconf.cmd_q = 10;
|
|
adapter->tx_pcb.data.memconf.rcv_q = 20;
|
|
adapter->tx_pcb.data.memconf.mcast = 10;
|
|
adapter->tx_pcb.data.memconf.frame = 20;
|
|
adapter->tx_pcb.data.memconf.rcv_b = 20;
|
|
adapter->tx_pcb.data.memconf.progs = 0;
|
|
adapter->tx_pcb.length = sizeof(struct Memconf);
|
|
adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0;
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
|
pr_err("%s: couldn't send memory configuration command\n", dev->name);
|
|
else {
|
|
unsigned long timeout = jiffies + TIMEOUT;
|
|
while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout));
|
|
if (time_after_eq(jiffies, timeout))
|
|
TIMEOUT_MSG(__LINE__);
|
|
}
|
|
|
|
|
|
/*
|
|
* configure adapter to receive broadcast messages and wait for response
|
|
*/
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: sending 82586 configure command\n", dev->name);
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_82586;
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
|
|
adapter->tx_pcb.length = 2;
|
|
adapter->got[CMD_CONFIGURE_82586] = 0;
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
|
pr_err("%s: couldn't send 82586 configure command\n", dev->name);
|
|
else {
|
|
unsigned long timeout = jiffies + TIMEOUT;
|
|
while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
|
|
if (time_after_eq(jiffies, timeout))
|
|
TIMEOUT_MSG(__LINE__);
|
|
}
|
|
|
|
/* enable burst-mode DMA */
|
|
/* outb(0x1, dev->base_addr + PORT_AUXDMA); */
|
|
|
|
/*
|
|
* queue receive commands to provide buffering
|
|
*/
|
|
prime_rx(dev);
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: %d receive PCBs active\n", dev->name, adapter->rx_active);
|
|
|
|
/*
|
|
* device is now officially open!
|
|
*/
|
|
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/******************************************************
|
|
*
|
|
* send a packet to the adapter
|
|
*
|
|
******************************************************/
|
|
|
|
static netdev_tx_t send_packet(struct net_device *dev, struct sk_buff *skb)
|
|
{
|
|
elp_device *adapter = netdev_priv(dev);
|
|
unsigned long target;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* make sure the length is even and no shorter than 60 bytes
|
|
*/
|
|
unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1);
|
|
|
|
if (test_and_set_bit(0, (void *) &adapter->busy)) {
|
|
if (elp_debug >= 2)
|
|
pr_debug("%s: transmit blocked\n", dev->name);
|
|
return false;
|
|
}
|
|
|
|
dev->stats.tx_bytes += nlen;
|
|
|
|
/*
|
|
* send the adapter a transmit packet command. Ignore segment and offset
|
|
* and make sure the length is even
|
|
*/
|
|
adapter->tx_pcb.command = CMD_TRANSMIT_PACKET;
|
|
adapter->tx_pcb.length = sizeof(struct Xmit_pkt);
|
|
adapter->tx_pcb.data.xmit_pkt.buf_ofs
|
|
= adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */
|
|
adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen;
|
|
|
|
if (!send_pcb(dev, &adapter->tx_pcb)) {
|
|
adapter->busy = 0;
|
|
return false;
|
|
}
|
|
/* if this happens, we die */
|
|
if (test_and_set_bit(0, (void *) &adapter->dmaing))
|
|
pr_debug("%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction);
|
|
|
|
adapter->current_dma.direction = 1;
|
|
adapter->current_dma.start_time = jiffies;
|
|
|
|
if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS || nlen != skb->len) {
|
|
skb_copy_from_linear_data(skb, adapter->dma_buffer, nlen);
|
|
memset(adapter->dma_buffer+skb->len, 0, nlen-skb->len);
|
|
target = isa_virt_to_bus(adapter->dma_buffer);
|
|
}
|
|
else {
|
|
target = isa_virt_to_bus(skb->data);
|
|
}
|
|
adapter->current_dma.skb = skb;
|
|
|
|
flags=claim_dma_lock();
|
|
disable_dma(dev->dma);
|
|
clear_dma_ff(dev->dma);
|
|
set_dma_mode(dev->dma, 0x48); /* dma memory -> io */
|
|
set_dma_addr(dev->dma, target);
|
|
set_dma_count(dev->dma, nlen);
|
|
outb_control(adapter->hcr_val | DMAE | TCEN, dev);
|
|
enable_dma(dev->dma);
|
|
release_dma_lock(flags);
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: DMA transfer started\n", dev->name);
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* The upper layer thinks we timed out
|
|
*/
|
|
|
|
static void elp_timeout(struct net_device *dev)
|
|
{
|
|
int stat;
|
|
|
|
stat = inb_status(dev->base_addr);
|
|
pr_warning("%s: transmit timed out, lost %s?\n", dev->name,
|
|
(stat & ACRF) ? "interrupt" : "command");
|
|
if (elp_debug >= 1)
|
|
pr_debug("%s: status %#02x\n", dev->name, stat);
|
|
dev->trans_start = jiffies;
|
|
dev->stats.tx_dropped++;
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
/******************************************************
|
|
*
|
|
* start the transmitter
|
|
* return 0 if sent OK, else return 1
|
|
*
|
|
******************************************************/
|
|
|
|
static netdev_tx_t elp_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
unsigned long flags;
|
|
elp_device *adapter = netdev_priv(dev);
|
|
|
|
spin_lock_irqsave(&adapter->lock, flags);
|
|
check_3c505_dma(dev);
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: request to send packet of length %d\n", dev->name, (int) skb->len);
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/*
|
|
* send the packet at skb->data for skb->len
|
|
*/
|
|
if (!send_packet(dev, skb)) {
|
|
if (elp_debug >= 2) {
|
|
pr_debug("%s: failed to transmit packet\n", dev->name);
|
|
}
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: packet of length %d sent\n", dev->name, (int) skb->len);
|
|
|
|
/*
|
|
* start the transmit timeout
|
|
*/
|
|
dev->trans_start = jiffies;
|
|
|
|
prime_rx(dev);
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
|
netif_start_queue(dev);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/******************************************************
|
|
*
|
|
* return statistics on the board
|
|
*
|
|
******************************************************/
|
|
|
|
static struct net_device_stats *elp_get_stats(struct net_device *dev)
|
|
{
|
|
elp_device *adapter = netdev_priv(dev);
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: request for stats\n", dev->name);
|
|
|
|
/* If the device is closed, just return the latest stats we have,
|
|
- we cannot ask from the adapter without interrupts */
|
|
if (!netif_running(dev))
|
|
return &dev->stats;
|
|
|
|
/* send a get statistics command to the board */
|
|
adapter->tx_pcb.command = CMD_NETWORK_STATISTICS;
|
|
adapter->tx_pcb.length = 0;
|
|
adapter->got[CMD_NETWORK_STATISTICS] = 0;
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
|
pr_err("%s: couldn't send get statistics command\n", dev->name);
|
|
else {
|
|
unsigned long timeout = jiffies + TIMEOUT;
|
|
while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout));
|
|
if (time_after_eq(jiffies, timeout)) {
|
|
TIMEOUT_MSG(__LINE__);
|
|
return &dev->stats;
|
|
}
|
|
}
|
|
|
|
/* statistics are now up to date */
|
|
return &dev->stats;
|
|
}
|
|
|
|
|
|
static void netdev_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strcpy(info->driver, DRV_NAME);
|
|
strcpy(info->version, DRV_VERSION);
|
|
sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
|
|
}
|
|
|
|
static u32 netdev_get_msglevel(struct net_device *dev)
|
|
{
|
|
return debug;
|
|
}
|
|
|
|
static void netdev_set_msglevel(struct net_device *dev, u32 level)
|
|
{
|
|
debug = level;
|
|
}
|
|
|
|
static const struct ethtool_ops netdev_ethtool_ops = {
|
|
.get_drvinfo = netdev_get_drvinfo,
|
|
.get_msglevel = netdev_get_msglevel,
|
|
.set_msglevel = netdev_set_msglevel,
|
|
};
|
|
|
|
/******************************************************
|
|
*
|
|
* close the board
|
|
*
|
|
******************************************************/
|
|
|
|
static int elp_close(struct net_device *dev)
|
|
{
|
|
elp_device *adapter = netdev_priv(dev);
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: request to close device\n", dev->name);
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/* Someone may request the device statistic information even when
|
|
* the interface is closed. The following will update the statistics
|
|
* structure in the driver, so we'll be able to give current statistics.
|
|
*/
|
|
(void) elp_get_stats(dev);
|
|
|
|
/*
|
|
* disable interrupts on the board
|
|
*/
|
|
outb_control(0, dev);
|
|
|
|
/*
|
|
* release the IRQ
|
|
*/
|
|
free_irq(dev->irq, dev);
|
|
|
|
free_dma(dev->dma);
|
|
free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/************************************************************
|
|
*
|
|
* Set multicast list
|
|
* num_addrs==0: clear mc_list
|
|
* num_addrs==-1: set promiscuous mode
|
|
* num_addrs>0: set mc_list
|
|
*
|
|
************************************************************/
|
|
|
|
static void elp_set_mc_list(struct net_device *dev)
|
|
{
|
|
elp_device *adapter = netdev_priv(dev);
|
|
struct dev_mc_list *dmi = dev->mc_list;
|
|
int i;
|
|
unsigned long flags;
|
|
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: request to set multicast list\n", dev->name);
|
|
|
|
spin_lock_irqsave(&adapter->lock, flags);
|
|
|
|
if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
|
|
/* send a "load multicast list" command to the board, max 10 addrs/cmd */
|
|
/* if num_addrs==0 the list will be cleared */
|
|
adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST;
|
|
adapter->tx_pcb.length = 6 * dev->mc_count;
|
|
for (i = 0; i < dev->mc_count; i++) {
|
|
memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr, 6);
|
|
dmi = dmi->next;
|
|
}
|
|
adapter->got[CMD_LOAD_MULTICAST_LIST] = 0;
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
|
pr_err("%s: couldn't send set_multicast command\n", dev->name);
|
|
else {
|
|
unsigned long timeout = jiffies + TIMEOUT;
|
|
while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout));
|
|
if (time_after_eq(jiffies, timeout)) {
|
|
TIMEOUT_MSG(__LINE__);
|
|
}
|
|
}
|
|
if (dev->mc_count)
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI;
|
|
else /* num_addrs == 0 */
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD;
|
|
} else
|
|
adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC;
|
|
/*
|
|
* configure adapter to receive messages (as specified above)
|
|
* and wait for response
|
|
*/
|
|
if (elp_debug >= 3)
|
|
pr_debug("%s: sending 82586 configure command\n", dev->name);
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_82586;
|
|
adapter->tx_pcb.length = 2;
|
|
adapter->got[CMD_CONFIGURE_82586] = 0;
|
|
if (!send_pcb(dev, &adapter->tx_pcb))
|
|
{
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
|
pr_err("%s: couldn't send 82586 configure command\n", dev->name);
|
|
}
|
|
else {
|
|
unsigned long timeout = jiffies + TIMEOUT;
|
|
spin_unlock_irqrestore(&adapter->lock, flags);
|
|
while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout));
|
|
if (time_after_eq(jiffies, timeout))
|
|
TIMEOUT_MSG(__LINE__);
|
|
}
|
|
}
|
|
|
|
/************************************************************
|
|
*
|
|
* A couple of tests to see if there's 3C505 or not
|
|
* Called only by elp_autodetect
|
|
************************************************************/
|
|
|
|
static int __init elp_sense(struct net_device *dev)
|
|
{
|
|
int addr = dev->base_addr;
|
|
const char *name = dev->name;
|
|
byte orig_HSR;
|
|
|
|
if (!request_region(addr, ELP_IO_EXTENT, "3c505"))
|
|
return -ENODEV;
|
|
|
|
orig_HSR = inb_status(addr);
|
|
|
|
if (elp_debug > 0)
|
|
pr_debug(search_msg, name, addr);
|
|
|
|
if (orig_HSR == 0xff) {
|
|
if (elp_debug > 0)
|
|
pr_cont(notfound_msg, 1);
|
|
goto out;
|
|
}
|
|
|
|
/* Wait for a while; the adapter may still be booting up */
|
|
if (elp_debug > 0)
|
|
pr_cont(stilllooking_msg);
|
|
|
|
if (orig_HSR & DIR) {
|
|
/* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */
|
|
outb(0, dev->base_addr + PORT_CONTROL);
|
|
msleep(300);
|
|
if (inb_status(addr) & DIR) {
|
|
if (elp_debug > 0)
|
|
pr_cont(notfound_msg, 2);
|
|
goto out;
|
|
}
|
|
} else {
|
|
/* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */
|
|
outb(DIR, dev->base_addr + PORT_CONTROL);
|
|
msleep(300);
|
|
if (!(inb_status(addr) & DIR)) {
|
|
if (elp_debug > 0)
|
|
pr_cont(notfound_msg, 3);
|
|
goto out;
|
|
}
|
|
}
|
|
/*
|
|
* It certainly looks like a 3c505.
|
|
*/
|
|
if (elp_debug > 0)
|
|
pr_cont(found_msg);
|
|
|
|
return 0;
|
|
out:
|
|
release_region(addr, ELP_IO_EXTENT);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*************************************************************
|
|
*
|
|
* Search through addr_list[] and try to find a 3C505
|
|
* Called only by eplus_probe
|
|
*************************************************************/
|
|
|
|
static int __init elp_autodetect(struct net_device *dev)
|
|
{
|
|
int idx = 0;
|
|
|
|
/* if base address set, then only check that address
|
|
otherwise, run through the table */
|
|
if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */
|
|
if (elp_sense(dev) == 0)
|
|
return dev->base_addr;
|
|
} else
|
|
while ((dev->base_addr = addr_list[idx++])) {
|
|
if (elp_sense(dev) == 0)
|
|
return dev->base_addr;
|
|
}
|
|
|
|
/* could not find an adapter */
|
|
if (elp_debug > 0)
|
|
pr_debug(couldnot_msg, dev->name);
|
|
|
|
return 0; /* Because of this, the layer above will return -ENODEV */
|
|
}
|
|
|
|
static const struct net_device_ops elp_netdev_ops = {
|
|
.ndo_open = elp_open,
|
|
.ndo_stop = elp_close,
|
|
.ndo_get_stats = elp_get_stats,
|
|
.ndo_start_xmit = elp_start_xmit,
|
|
.ndo_tx_timeout = elp_timeout,
|
|
.ndo_set_multicast_list = elp_set_mc_list,
|
|
.ndo_change_mtu = eth_change_mtu,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
};
|
|
|
|
/******************************************************
|
|
*
|
|
* probe for an Etherlink Plus board at the specified address
|
|
*
|
|
******************************************************/
|
|
|
|
/* There are three situations we need to be able to detect here:
|
|
|
|
* a) the card is idle
|
|
* b) the card is still booting up
|
|
* c) the card is stuck in a strange state (some DOS drivers do this)
|
|
*
|
|
* In case (a), all is well. In case (b), we wait 10 seconds to see if the
|
|
* card finishes booting, and carry on if so. In case (c), we do a hard reset,
|
|
* loop round, and hope for the best.
|
|
*
|
|
* This is all very unpleasant, but hopefully avoids the problems with the old
|
|
* probe code (which had a 15-second delay if the card was idle, and didn't
|
|
* work at all if it was in a weird state).
|
|
*/
|
|
|
|
static int __init elplus_setup(struct net_device *dev)
|
|
{
|
|
elp_device *adapter = netdev_priv(dev);
|
|
int i, tries, tries1, okay;
|
|
unsigned long timeout;
|
|
unsigned long cookie = 0;
|
|
int err = -ENODEV;
|
|
|
|
/*
|
|
* setup adapter structure
|
|
*/
|
|
|
|
dev->base_addr = elp_autodetect(dev);
|
|
if (!dev->base_addr)
|
|
return -ENODEV;
|
|
|
|
adapter->send_pcb_semaphore = 0;
|
|
|
|
for (tries1 = 0; tries1 < 3; tries1++) {
|
|
outb_control((adapter->hcr_val | CMDE) & ~DIR, dev);
|
|
/* First try to write just one byte, to see if the card is
|
|
* responding at all normally.
|
|
*/
|
|
timeout = jiffies + 5*HZ/100;
|
|
okay = 0;
|
|
while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
|
|
if ((inb_status(dev->base_addr) & HCRE)) {
|
|
outb_command(0, dev->base_addr); /* send a spurious byte */
|
|
timeout = jiffies + 5*HZ/100;
|
|
while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE));
|
|
if (inb_status(dev->base_addr) & HCRE)
|
|
okay = 1;
|
|
}
|
|
if (!okay) {
|
|
/* Nope, it's ignoring the command register. This means that
|
|
* either it's still booting up, or it's died.
|
|
*/
|
|
pr_err("%s: command register wouldn't drain, ", dev->name);
|
|
if ((inb_status(dev->base_addr) & 7) == 3) {
|
|
/* If the adapter status is 3, it *could* still be booting.
|
|
* Give it the benefit of the doubt for 10 seconds.
|
|
*/
|
|
pr_cont("assuming 3c505 still starting\n");
|
|
timeout = jiffies + 10*HZ;
|
|
while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7));
|
|
if (inb_status(dev->base_addr) & 7) {
|
|
pr_err("%s: 3c505 failed to start\n", dev->name);
|
|
} else {
|
|
okay = 1; /* It started */
|
|
}
|
|
} else {
|
|
/* Otherwise, it must just be in a strange
|
|
* state. We probably need to kick it.
|
|
*/
|
|
pr_cont("3c505 is sulking\n");
|
|
}
|
|
}
|
|
for (tries = 0; tries < 5 && okay; tries++) {
|
|
|
|
/*
|
|
* Try to set the Ethernet address, to make sure that the board
|
|
* is working.
|
|
*/
|
|
adapter->tx_pcb.command = CMD_STATION_ADDRESS;
|
|
adapter->tx_pcb.length = 0;
|
|
cookie = probe_irq_on();
|
|
if (!send_pcb(dev, &adapter->tx_pcb)) {
|
|
pr_err("%s: could not send first PCB\n", dev->name);
|
|
probe_irq_off(cookie);
|
|
continue;
|
|
}
|
|
if (!receive_pcb(dev, &adapter->rx_pcb)) {
|
|
pr_err("%s: could not read first PCB\n", dev->name);
|
|
probe_irq_off(cookie);
|
|
continue;
|
|
}
|
|
if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) ||
|
|
(adapter->rx_pcb.length != 6)) {
|
|
pr_err("%s: first PCB wrong (%d, %d)\n", dev->name,
|
|
adapter->rx_pcb.command, adapter->rx_pcb.length);
|
|
probe_irq_off(cookie);
|
|
continue;
|
|
}
|
|
goto okay;
|
|
}
|
|
/* It's broken. Do a hard reset to re-initialise the board,
|
|
* and try again.
|
|
*/
|
|
pr_info("%s: resetting adapter\n", dev->name);
|
|
outb_control(adapter->hcr_val | FLSH | ATTN, dev);
|
|
outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev);
|
|
}
|
|
pr_err("%s: failed to initialise 3c505\n", dev->name);
|
|
goto out;
|
|
|
|
okay:
|
|
if (dev->irq) { /* Is there a preset IRQ? */
|
|
int rpt = probe_irq_off(cookie);
|
|
if (dev->irq != rpt) {
|
|
pr_warning("%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt);
|
|
}
|
|
/* if dev->irq == probe_irq_off(cookie), all is well */
|
|
} else /* No preset IRQ; just use what we can detect */
|
|
dev->irq = probe_irq_off(cookie);
|
|
switch (dev->irq) { /* Legal, sane? */
|
|
case 0:
|
|
pr_err("%s: IRQ probe failed: check 3c505 jumpers.\n",
|
|
dev->name);
|
|
goto out;
|
|
case 1:
|
|
case 6:
|
|
case 8:
|
|
case 13:
|
|
pr_err("%s: Impossible IRQ %d reported by probe_irq_off().\n",
|
|
dev->name, dev->irq);
|
|
goto out;
|
|
}
|
|
/*
|
|
* Now we have the IRQ number so we can disable the interrupts from
|
|
* the board until the board is opened.
|
|
*/
|
|
outb_control(adapter->hcr_val & ~CMDE, dev);
|
|
|
|
/*
|
|
* copy Ethernet address into structure
|
|
*/
|
|
for (i = 0; i < 6; i++)
|
|
dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i];
|
|
|
|
/* find a DMA channel */
|
|
if (!dev->dma) {
|
|
if (dev->mem_start) {
|
|
dev->dma = dev->mem_start & 7;
|
|
}
|
|
else {
|
|
pr_warning("%s: warning, DMA channel not specified, using default\n", dev->name);
|
|
dev->dma = ELP_DMA;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* print remainder of startup message
|
|
*/
|
|
pr_info("%s: 3c505 at %#lx, irq %d, dma %d, addr %pM, ",
|
|
dev->name, dev->base_addr, dev->irq, dev->dma, dev->dev_addr);
|
|
/*
|
|
* read more information from the adapter
|
|
*/
|
|
|
|
adapter->tx_pcb.command = CMD_ADAPTER_INFO;
|
|
adapter->tx_pcb.length = 0;
|
|
if (!send_pcb(dev, &adapter->tx_pcb) ||
|
|
!receive_pcb(dev, &adapter->rx_pcb) ||
|
|
(adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) ||
|
|
(adapter->rx_pcb.length != 10)) {
|
|
pr_cont("not responding to second PCB\n");
|
|
}
|
|
pr_cont("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);
|
|
|
|
/*
|
|
* reconfigure the adapter memory to better suit our purposes
|
|
*/
|
|
adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY;
|
|
adapter->tx_pcb.length = 12;
|
|
adapter->tx_pcb.data.memconf.cmd_q = 8;
|
|
adapter->tx_pcb.data.memconf.rcv_q = 8;
|
|
adapter->tx_pcb.data.memconf.mcast = 10;
|
|
adapter->tx_pcb.data.memconf.frame = 10;
|
|
adapter->tx_pcb.data.memconf.rcv_b = 10;
|
|
adapter->tx_pcb.data.memconf.progs = 0;
|
|
if (!send_pcb(dev, &adapter->tx_pcb) ||
|
|
!receive_pcb(dev, &adapter->rx_pcb) ||
|
|
(adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) ||
|
|
(adapter->rx_pcb.length != 2)) {
|
|
pr_err("%s: could not configure adapter memory\n", dev->name);
|
|
}
|
|
if (adapter->rx_pcb.data.configure) {
|
|
pr_err("%s: adapter configuration failed\n", dev->name);
|
|
}
|
|
|
|
dev->netdev_ops = &elp_netdev_ops;
|
|
dev->watchdog_timeo = 10*HZ;
|
|
dev->ethtool_ops = &netdev_ethtool_ops; /* local */
|
|
|
|
dev->mem_start = dev->mem_end = 0;
|
|
|
|
err = register_netdev(dev);
|
|
if (err)
|
|
goto out;
|
|
|
|
return 0;
|
|
out:
|
|
release_region(dev->base_addr, ELP_IO_EXTENT);
|
|
return err;
|
|
}
|
|
|
|
#ifndef MODULE
|
|
struct net_device * __init elplus_probe(int unit)
|
|
{
|
|
struct net_device *dev = alloc_etherdev(sizeof(elp_device));
|
|
int err;
|
|
if (!dev)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
sprintf(dev->name, "eth%d", unit);
|
|
netdev_boot_setup_check(dev);
|
|
|
|
err = elplus_setup(dev);
|
|
if (err) {
|
|
free_netdev(dev);
|
|
return ERR_PTR(err);
|
|
}
|
|
return dev;
|
|
}
|
|
|
|
#else
|
|
static struct net_device *dev_3c505[ELP_MAX_CARDS];
|
|
static int io[ELP_MAX_CARDS];
|
|
static int irq[ELP_MAX_CARDS];
|
|
static int dma[ELP_MAX_CARDS];
|
|
module_param_array(io, int, NULL, 0);
|
|
module_param_array(irq, int, NULL, 0);
|
|
module_param_array(dma, int, NULL, 0);
|
|
MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)");
|
|
MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)");
|
|
MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)");
|
|
|
|
int __init init_module(void)
|
|
{
|
|
int this_dev, found = 0;
|
|
|
|
for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
|
|
struct net_device *dev = alloc_etherdev(sizeof(elp_device));
|
|
if (!dev)
|
|
break;
|
|
|
|
dev->irq = irq[this_dev];
|
|
dev->base_addr = io[this_dev];
|
|
if (dma[this_dev]) {
|
|
dev->dma = dma[this_dev];
|
|
} else {
|
|
dev->dma = ELP_DMA;
|
|
pr_warning("3c505.c: warning, using default DMA channel,\n");
|
|
}
|
|
if (io[this_dev] == 0) {
|
|
if (this_dev) {
|
|
free_netdev(dev);
|
|
break;
|
|
}
|
|
pr_notice("3c505.c: module autoprobe not recommended, give io=xx.\n");
|
|
}
|
|
if (elplus_setup(dev) != 0) {
|
|
pr_warning("3c505.c: Failed to register card at 0x%x.\n", io[this_dev]);
|
|
free_netdev(dev);
|
|
break;
|
|
}
|
|
dev_3c505[this_dev] = dev;
|
|
found++;
|
|
}
|
|
if (!found)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
void __exit cleanup_module(void)
|
|
{
|
|
int this_dev;
|
|
|
|
for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) {
|
|
struct net_device *dev = dev_3c505[this_dev];
|
|
if (dev) {
|
|
unregister_netdev(dev);
|
|
release_region(dev->base_addr, ELP_IO_EXTENT);
|
|
free_netdev(dev);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif /* MODULE */
|
|
MODULE_LICENSE("GPL");
|