diff options
Diffstat (limited to 'drivers/net/smc9194.c')
| -rw-r--r-- | drivers/net/smc9194.c | 1589 |
1 files changed, 0 insertions, 1589 deletions
diff --git a/drivers/net/smc9194.c b/drivers/net/smc9194.c deleted file mode 100644 index 5b65ac4b3ce..00000000000 --- a/drivers/net/smc9194.c +++ /dev/null @@ -1,1589 +0,0 @@ -/*------------------------------------------------------------------------ - . smc9194.c - . This is a driver for SMC's 9000 series of Ethernet cards. - . - . Copyright (C) 1996 by Erik Stahlman - . This software may be used and distributed according to the terms - . of the GNU General Public License, incorporated herein by reference. - . - . "Features" of the SMC chip: - . 4608 byte packet memory. ( for the 91C92. Others have more ) - . EEPROM for configuration - . AUI/TP selection ( mine has 10Base2/10BaseT select ) - . - . Arguments: - . io = for the base address - . irq = for the IRQ - . ifport = 0 for autodetect, 1 for TP, 2 for AUI ( or 10base2 ) - . - . author: - . Erik Stahlman ( erik@vt.edu ) - . contributors: - . Arnaldo Carvalho de Melo <acme@conectiva.com.br> - . - . Hardware multicast code from Peter Cammaert ( pc@denkart.be ) - . - . Sources: - . o SMC databook - . o skeleton.c by Donald Becker ( becker@scyld.com ) - . o ( a LOT of advice from Becker as well ) - . - . History: - . 12/07/95 Erik Stahlman written, got receive/xmit handled - . 01/03/96 Erik Stahlman worked out some bugs, actually usable!!! :-) - . 01/06/96 Erik Stahlman cleaned up some, better testing, etc - . 01/29/96 Erik Stahlman fixed autoirq, added multicast - . 02/01/96 Erik Stahlman 1. disabled all interrupts in smc_reset - . 2. got rid of post-decrementing bug -- UGH. - . 02/13/96 Erik Stahlman Tried to fix autoirq failure. Added more - . descriptive error messages. - . 02/15/96 Erik Stahlman Fixed typo that caused detection failure - . 02/23/96 Erik Stahlman Modified it to fit into kernel tree - . Added support to change hardware address - . Cleared stats on opens - . 02/26/96 Erik Stahlman Trial support for Kernel 1.2.13 - . Kludge for automatic IRQ detection - . 03/04/96 Erik Stahlman Fixed kernel 1.3.70 + - . Fixed bug reported by Gardner Buchanan in - . smc_enable, with outw instead of outb - . 03/06/96 Erik Stahlman Added hardware multicast from Peter Cammaert - . 04/14/00 Heiko Pruessing (SMA Regelsysteme) Fixed bug in chip memory - . allocation - . 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet - . 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ" - . 11/08/01 Matt Domsch Use common crc32 function - ----------------------------------------------------------------------------*/ - -static const char version[] = - "smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)\n"; - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/in.h> -#include <linux/string.h> -#include <linux/init.h> -#include <linux/crc32.h> -#include <linux/errno.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/bitops.h> - -#include <asm/io.h> - -#include "smc9194.h" - -#define DRV_NAME "smc9194" - -/*------------------------------------------------------------------------ - . - . Configuration options, for the experienced user to change. - . - -------------------------------------------------------------------------*/ - -/* - . Do you want to use 32 bit xfers? This should work on all chips, as - . the chipset is designed to accommodate them. -*/ -#ifdef __sh__ -#undef USE_32_BIT -#else -#define USE_32_BIT 1 -#endif - -#if defined(__H8300H__) || defined(__H8300S__) -#define NO_AUTOPROBE -#undef insl -#undef outsl -#define insl(a,b,l) io_insl_noswap(a,b,l) -#define outsl(a,b,l) io_outsl_noswap(a,b,l) -#endif - -/* - .the SMC9194 can be at any of the following port addresses. To change, - .for a slightly different card, you can add it to the array. Keep in - .mind that the array must end in zero. -*/ - -struct devlist { - unsigned int port; - unsigned int irq; -}; - -#if defined(CONFIG_H8S_EDOSK2674) -static struct devlist smc_devlist[] __initdata = { - {.port = 0xf80000, .irq = 16}, - {.port = 0, .irq = 0 }, -}; -#else -static struct devlist smc_devlist[] __initdata = { - {.port = 0x200, .irq = 0}, - {.port = 0x220, .irq = 0}, - {.port = 0x240, .irq = 0}, - {.port = 0x260, .irq = 0}, - {.port = 0x280, .irq = 0}, - {.port = 0x2A0, .irq = 0}, - {.port = 0x2C0, .irq = 0}, - {.port = 0x2E0, .irq = 0}, - {.port = 0x300, .irq = 0}, - {.port = 0x320, .irq = 0}, - {.port = 0x340, .irq = 0}, - {.port = 0x360, .irq = 0}, - {.port = 0x380, .irq = 0}, - {.port = 0x3A0, .irq = 0}, - {.port = 0x3C0, .irq = 0}, - {.port = 0x3E0, .irq = 0}, - {.port = 0, .irq = 0}, -}; -#endif -/* - . Wait time for memory to be free. This probably shouldn't be - . tuned that much, as waiting for this means nothing else happens - . in the system -*/ -#define MEMORY_WAIT_TIME 16 - -/* - . DEBUGGING LEVELS - . - . 0 for normal operation - . 1 for slightly more details - . >2 for various levels of increasingly useless information - . 2 for interrupt tracking, status flags - . 3 for packet dumps, etc. -*/ -#define SMC_DEBUG 0 - -#if (SMC_DEBUG > 2 ) -#define PRINTK3(x) printk x -#else -#define PRINTK3(x) -#endif - -#if SMC_DEBUG > 1 -#define PRINTK2(x) printk x -#else -#define PRINTK2(x) -#endif - -#ifdef SMC_DEBUG -#define PRINTK(x) printk x -#else -#define PRINTK(x) -#endif - - -/*------------------------------------------------------------------------ - . - . The internal workings of the driver. If you are changing anything - . here with the SMC stuff, you should have the datasheet and known - . what you are doing. - . - -------------------------------------------------------------------------*/ -#define CARDNAME "SMC9194" - - -/* store this information for the driver.. */ -struct smc_local { - /* - If I have to wait until memory is available to send - a packet, I will store the skbuff here, until I get the - desired memory. Then, I'll send it out and free it. - */ - struct sk_buff * saved_skb; - - /* - . This keeps track of how many packets that I have - . sent out. When an TX_EMPTY interrupt comes, I know - . that all of these have been sent. - */ - int packets_waiting; -}; - - -/*----------------------------------------------------------------- - . - . The driver can be entered at any of the following entry points. - . - .------------------------------------------------------------------ */ - -/* - . This is called by register_netdev(). It is responsible for - . checking the portlist for the SMC9000 series chipset. If it finds - . one, then it will initialize the device, find the hardware information, - . and sets up the appropriate device parameters. - . NOTE: Interrupts are *OFF* when this procedure is called. - . - . NB:This shouldn't be static since it is referred to externally. -*/ -struct net_device *smc_init(int unit); - -/* - . The kernel calls this function when someone wants to use the device, - . typically 'ifconfig ethX up'. -*/ -static int smc_open(struct net_device *dev); - -/* - . Our watchdog timed out. Called by the networking layer -*/ -static void smc_timeout(struct net_device *dev); - -/* - . This is called by the kernel in response to 'ifconfig ethX down'. It - . is responsible for cleaning up everything that the open routine - . does, and maybe putting the card into a powerdown state. -*/ -static int smc_close(struct net_device *dev); - -/* - . Finally, a call to set promiscuous mode ( for TCPDUMP and related - . programs ) and multicast modes. -*/ -static void smc_set_multicast_list(struct net_device *dev); - - -/*--------------------------------------------------------------- - . - . Interrupt level calls.. - . - ----------------------------------------------------------------*/ - -/* - . Handles the actual interrupt -*/ -static irqreturn_t smc_interrupt(int irq, void *); -/* - . This is a separate procedure to handle the receipt of a packet, to - . leave the interrupt code looking slightly cleaner -*/ -static inline void smc_rcv( struct net_device *dev ); -/* - . This handles a TX interrupt, which is only called when an error - . relating to a packet is sent. -*/ -static inline void smc_tx( struct net_device * dev ); - -/* - ------------------------------------------------------------ - . - . Internal routines - . - ------------------------------------------------------------ -*/ - -/* - . Test if a given location contains a chip, trying to cause as - . little damage as possible if it's not a SMC chip. -*/ -static int smc_probe(struct net_device *dev, int ioaddr); - -/* - . A rather simple routine to print out a packet for debugging purposes. -*/ -#if SMC_DEBUG > 2 -static void print_packet( byte *, int ); -#endif - -#define tx_done(dev) 1 - -/* this is called to actually send the packet to the chip */ -static void smc_hardware_send_packet( struct net_device * dev ); - -/* Since I am not sure if I will have enough room in the chip's ram - . to store the packet, I call this routine, which either sends it - . now, or generates an interrupt when the card is ready for the - . packet */ -static netdev_tx_t smc_wait_to_send_packet( struct sk_buff * skb, - struct net_device *dev ); - -/* this does a soft reset on the device */ -static void smc_reset( int ioaddr ); - -/* Enable Interrupts, Receive, and Transmit */ -static void smc_enable( int ioaddr ); - -/* this puts the device in an inactive state */ -static void smc_shutdown( int ioaddr ); - -/* This routine will find the IRQ of the driver if one is not - . specified in the input to the device. */ -static int smc_findirq( int ioaddr ); - -/* - . Function: smc_reset( int ioaddr ) - . Purpose: - . This sets the SMC91xx chip to its normal state, hopefully from whatever - . mess that any other DOS driver has put it in. - . - . Maybe I should reset more registers to defaults in here? SOFTRESET should - . do that for me. - . - . Method: - . 1. send a SOFT RESET - . 2. wait for it to finish - . 3. enable autorelease mode - . 4. reset the memory management unit - . 5. clear all interrupts - . -*/ -static void smc_reset( int ioaddr ) -{ - /* This resets the registers mostly to defaults, but doesn't - affect EEPROM. That seems unnecessary */ - SMC_SELECT_BANK( 0 ); - outw( RCR_SOFTRESET, ioaddr + RCR ); - - /* this should pause enough for the chip to be happy */ - SMC_DELAY( ); - - /* Set the transmit and receive configuration registers to - default values */ - outw( RCR_CLEAR, ioaddr + RCR ); - outw( TCR_CLEAR, ioaddr + TCR ); - - /* set the control register to automatically - release successfully transmitted packets, to make the best - use out of our limited memory */ - SMC_SELECT_BANK( 1 ); - outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL ); - - /* Reset the MMU */ - SMC_SELECT_BANK( 2 ); - outw( MC_RESET, ioaddr + MMU_CMD ); - - /* Note: It doesn't seem that waiting for the MMU busy is needed here, - but this is a place where future chipsets _COULD_ break. Be wary - of issuing another MMU command right after this */ - - outb( 0, ioaddr + INT_MASK ); -} - -/* - . Function: smc_enable - . Purpose: let the chip talk to the outside work - . Method: - . 1. Enable the transmitter - . 2. Enable the receiver - . 3. Enable interrupts -*/ -static void smc_enable( int ioaddr ) -{ - SMC_SELECT_BANK( 0 ); - /* see the header file for options in TCR/RCR NORMAL*/ - outw( TCR_NORMAL, ioaddr + TCR ); - outw( RCR_NORMAL, ioaddr + RCR ); - - /* now, enable interrupts */ - SMC_SELECT_BANK( 2 ); - outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK ); -} - -/* - . Function: smc_shutdown - . Purpose: closes down the SMC91xxx chip. - . Method: - . 1. zero the interrupt mask - . 2. clear the enable receive flag - . 3. clear the enable xmit flags - . - . TODO: - . (1) maybe utilize power down mode. - . Why not yet? Because while the chip will go into power down mode, - . the manual says that it will wake up in response to any I/O requests - . in the register space. Empirical results do not show this working. -*/ -static void smc_shutdown( int ioaddr ) -{ - /* no more interrupts for me */ - SMC_SELECT_BANK( 2 ); - outb( 0, ioaddr + INT_MASK ); - - /* and tell the card to stay away from that nasty outside world */ - SMC_SELECT_BANK( 0 ); - outb( RCR_CLEAR, ioaddr + RCR ); - outb( TCR_CLEAR, ioaddr + TCR ); -#if 0 - /* finally, shut the chip down */ - SMC_SELECT_BANK( 1 ); - outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL ); -#endif -} - - -/* - . Function: smc_setmulticast( int ioaddr, struct net_device *dev ) - . Purpose: - . This sets the internal hardware table to filter out unwanted multicast - . packets before they take up memory. - . - . The SMC chip uses a hash table where the high 6 bits of the CRC of - . address are the offset into the table. If that bit is 1, then the - . multicast packet is accepted. Otherwise, it's dropped silently. - . - . To use the 6 bits as an offset into the table, the high 3 bits are the - . number of the 8 bit register, while the low 3 bits are the bit within - . that register. - . - . This routine is based very heavily on the one provided by Peter Cammaert. -*/ - - -static void smc_setmulticast(int ioaddr, struct net_device *dev) -{ - int i; - unsigned char multicast_table[ 8 ]; - struct netdev_hw_addr *ha; - /* table for flipping the order of 3 bits */ - unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 }; - - /* start with a table of all zeros: reject all */ - memset( multicast_table, 0, sizeof( multicast_table ) ); - - netdev_for_each_mc_addr(ha, dev) { - int position; - - /* only use the low order bits */ - position = ether_crc_le(6, ha->addr) & 0x3f; - - /* do some messy swapping to put the bit in the right spot */ - multicast_table[invert3[position&7]] |= - (1<<invert3[(position>>3)&7]); - - } - /* now, the table can be loaded into the chipset */ - SMC_SELECT_BANK( 3 ); - - for ( i = 0; i < 8 ; i++ ) { - outb( multicast_table[i], ioaddr + MULTICAST1 + i ); - } -} - -/* - . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * ) - . Purpose: - . Attempt to allocate memory for a packet, if chip-memory is not - . available, then tell the card to generate an interrupt when it - . is available. - . - . Algorithm: - . - . o if the saved_skb is not currently null, then drop this packet - . on the floor. This should never happen, because of TBUSY. - . o if the saved_skb is null, then replace it with the current packet, - . o See if I can sending it now. - . o (NO): Enable interrupts and let the interrupt handler deal with it. - . o (YES):Send it now. -*/ -static netdev_tx_t smc_wait_to_send_packet(struct sk_buff *skb, - struct net_device *dev) -{ - struct smc_local *lp = netdev_priv(dev); - unsigned int ioaddr = dev->base_addr; - word length; - unsigned short numPages; - word time_out; - - netif_stop_queue(dev); - /* Well, I want to send the packet.. but I don't know - if I can send it right now... */ - - if ( lp->saved_skb) { - /* THIS SHOULD NEVER HAPPEN. */ - dev->stats.tx_aborted_errors++; - printk(CARDNAME": Bad Craziness - sent packet while busy.\n" ); - return NETDEV_TX_BUSY; - } - lp->saved_skb = skb; - - length = skb->len; - - if (length < ETH_ZLEN) { - if (skb_padto(skb, ETH_ZLEN)) { - netif_wake_queue(dev); - return NETDEV_TX_OK; - } - length = ETH_ZLEN; - } - - /* - ** The MMU wants the number of pages to be the number of 256 bytes - ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) - ** - ** Pkt size for allocating is data length +6 (for additional status words, - ** length and ctl!) If odd size last byte is included in this header. - */ - numPages = ((length & 0xfffe) + 6) / 256; - - if (numPages > 7 ) { - printk(CARDNAME": Far too big packet error.\n"); - /* freeing the packet is a good thing here... but should - . any packets of this size get down here? */ - dev_kfree_skb (skb); - lp->saved_skb = NULL; - /* this IS an error, but, i don't want the skb saved */ - netif_wake_queue(dev); - return NETDEV_TX_OK; - } - /* either way, a packet is waiting now */ - lp->packets_waiting++; - - /* now, try to allocate the memory */ - SMC_SELECT_BANK( 2 ); - outw( MC_ALLOC | numPages, ioaddr + MMU_CMD ); - /* - . Performance Hack - . - . wait a short amount of time.. if I can send a packet now, I send - . it now. Otherwise, I enable an interrupt and wait for one to be - . available. - . - . I could have handled this a slightly different way, by checking to - . see if any memory was available in the FREE MEMORY register. However, - . either way, I need to generate an allocation, and the allocation works - . no matter what, so I saw no point in checking free memory. - */ - time_out = MEMORY_WAIT_TIME; - do { - word status; - - status = inb( ioaddr + INTERRUPT ); - if ( status & IM_ALLOC_INT ) { - /* acknowledge the interrupt */ - outb( IM_ALLOC_INT, ioaddr + INTERRUPT ); - break; - } - } while ( -- time_out ); - - if ( !time_out ) { - /* oh well, wait until the chip finds memory later */ - SMC_ENABLE_INT( IM_ALLOC_INT ); - PRINTK2((CARDNAME": memory allocation deferred.\n")); - /* it's deferred, but I'll handle it later */ - return NETDEV_TX_OK; - } - /* or YES! I can send the packet now.. */ - smc_hardware_send_packet(dev); - netif_wake_queue(dev); - return NETDEV_TX_OK; -} - -/* - . Function: smc_hardware_send_packet(struct net_device * ) - . Purpose: - . This sends the actual packet to the SMC9xxx chip. - . - . Algorithm: - . First, see if a saved_skb is available. - . ( this should NOT be called if there is no 'saved_skb' - . Now, find the packet number that the chip allocated - . Point the data pointers at it in memory - . Set the length word in the chip's memory - . Dump the packet to chip memory - . Check if a last byte is needed ( odd length packet ) - . if so, set the control flag right - . Tell the card to send it - . Enable the transmit interrupt, so I know if it failed - . Free the kernel data if I actually sent it. -*/ -static void smc_hardware_send_packet( struct net_device * dev ) -{ - struct smc_local *lp = netdev_priv(dev); - byte packet_no; - struct sk_buff * skb = lp->saved_skb; - word length; - unsigned int ioaddr; - byte * buf; - - ioaddr = dev->base_addr; - - if ( !skb ) { - PRINTK((CARDNAME": In XMIT with no packet to send\n")); - return; - } - length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; - buf = skb->data; - - /* If I get here, I _know_ there is a packet slot waiting for me */ - packet_no = inb( ioaddr + PNR_ARR + 1 ); - if ( packet_no & 0x80 ) { - /* or isn't there? BAD CHIP! */ - printk(KERN_DEBUG CARDNAME": Memory allocation failed.\n"); - dev_kfree_skb_any(skb); - lp->saved_skb = NULL; - netif_wake_queue(dev); - return; - } - - /* we have a packet address, so tell the card to use it */ - outb( packet_no, ioaddr + PNR_ARR ); - - /* point to the beginning of the packet */ - outw( PTR_AUTOINC , ioaddr + POINTER ); - - PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length )); -#if SMC_DEBUG > 2 - print_packet( buf, length ); -#endif - - /* send the packet length ( +6 for status, length and ctl byte ) - and the status word ( set to zeros ) */ -#ifdef USE_32_BIT - outl( (length +6 ) << 16 , ioaddr + DATA_1 ); -#else - outw( 0, ioaddr + DATA_1 ); - /* send the packet length ( +6 for status words, length, and ctl*/ - outb( (length+6) & 0xFF,ioaddr + DATA_1 ); - outb( (length+6) >> 8 , ioaddr + DATA_1 ); -#endif - - /* send the actual data - . I _think_ it's faster to send the longs first, and then - . mop up by sending the last word. It depends heavily - . on alignment, at least on the 486. Maybe it would be - . a good idea to check which is optimal? But that could take - . almost as much time as is saved? - */ -#ifdef USE_32_BIT - if ( length & 0x2 ) { - outsl(ioaddr + DATA_1, buf, length >> 2 ); -#if !defined(__H8300H__) && !defined(__H8300S__) - outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); -#else - ctrl_outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); -#endif - } - else - outsl(ioaddr + DATA_1, buf, length >> 2 ); -#else - outsw(ioaddr + DATA_1 , buf, (length ) >> 1); -#endif - /* Send the last byte, if there is one. */ - - if ( (length & 1) == 0 ) { - outw( 0, ioaddr + DATA_1 ); - } else { - outb( buf[length -1 ], ioaddr + DATA_1 ); - outb( 0x20, ioaddr + DATA_1); - } - - /* enable the interrupts */ - SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) ); - - /* and let the chipset deal with it */ - outw( MC_ENQUEUE , ioaddr + MMU_CMD ); - - PRINTK2((CARDNAME": Sent packet of length %d\n", length)); - - lp->saved_skb = NULL; - dev_kfree_skb_any (skb); - - dev->trans_start = jiffies; - - /* we can send another packet */ - netif_wake_queue(dev); -} - -/*------------------------------------------------------------------------- - | - | smc_init(int unit) - | Input parameters: - | dev->base_addr == 0, try to find all possible locations - | dev->base_addr == 1, return failure code - | dev->base_addr == 2, always allocate space, and return success - | dev->base_addr == <anything else> this is the address to check - | - | Output: - | pointer to net_device or ERR_PTR(error) - | - --------------------------------------------------------------------------- -*/ -static int io; -static int irq; -static int ifport; - -struct net_device * __init smc_init(int unit) -{ - struct net_device *dev = alloc_etherdev(sizeof(struct smc_local)); - struct devlist *smcdev = smc_devlist; - int err = 0; - - if (!dev) - return ERR_PTR(-ENODEV); - - if (unit >= 0) { - sprintf(dev->name, "eth%d", unit); - netdev_boot_setup_check(dev); - io = dev->base_addr; - irq = dev->irq; - } - - if (io > 0x1ff) { /* Check a single specified location. */ - err = smc_probe(dev, io); - } else if (io != 0) { /* Don't probe at all. */ - err = -ENXIO; - } else { - for (;smcdev->port; smcdev++) { - if (smc_probe(dev, smcdev->port) == 0) - break; - } - if (!smcdev->port) - err = -ENODEV; - } - if (err) - goto out; - err = register_netdev(dev); - if (err) - goto out1; - return dev; -out1: - free_irq(dev->irq, dev); - release_region(dev->base_addr, SMC_IO_EXTENT); -out: - free_netdev(dev); - return ERR_PTR(err); -} - -/*---------------------------------------------------------------------- - . smc_findirq - . - . This routine has a simple purpose -- make the SMC chip generate an - . interrupt, so an auto-detect routine can detect it, and find the IRQ, - ------------------------------------------------------------------------ -*/ -static int __init smc_findirq(int ioaddr) -{ -#ifndef NO_AUTOPROBE - int timeout = 20; - unsigned long cookie; - - - cookie = probe_irq_on(); - - /* - * What I try to do here is trigger an ALLOC_INT. This is done - * by allocating a small chunk of memory, which will give an interrupt - * when done. - */ - - - SMC_SELECT_BANK(2); - /* enable ALLOCation interrupts ONLY */ - outb( IM_ALLOC_INT, ioaddr + INT_MASK ); - - /* - . Allocate 512 bytes of memory. Note that the chip was just - . reset so all the memory is available - */ - outw( MC_ALLOC | 1, ioaddr + MMU_CMD ); - - /* - . Wait until positive that the interrupt has been generated - */ - while ( timeout ) { - byte int_status; - - int_status = inb( ioaddr + INTERRUPT ); - - if ( int_status & IM_ALLOC_INT ) - break; /* got the interrupt */ - timeout--; - } - /* there is really nothing that I can do here if timeout fails, - as probe_irq_off will return a 0 anyway, which is what I - want in this case. Plus, the clean up is needed in both - cases. */ - - /* DELAY HERE! - On a fast machine, the status might change before the interrupt - is given to the processor. This means that the interrupt was - never detected, and probe_irq_off fails to report anything. - This should fix probe_irq_* problems. - */ - SMC_DELAY(); - SMC_DELAY(); - - /* and disable all interrupts again */ - outb( 0, ioaddr + INT_MASK ); - - /* and return what I found */ - return probe_irq_off(cookie); -#else /* NO_AUTOPROBE */ - struct devlist *smcdev; - for (smcdev = smc_devlist; smcdev->port; smcdev++) { - if (smcdev->port == ioaddr) - return smcdev->irq; - } - return 0; -#endif -} - -static const struct net_device_ops smc_netdev_ops = { - .ndo_open = smc_open, - .ndo_stop = smc_close, - .ndo_start_xmit = smc_wait_to_send_packet, - .ndo_tx_timeout = smc_timeout, - .ndo_set_multicast_list = smc_set_multicast_list, - .ndo_change_mtu = eth_change_mtu, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, -}; - -/*---------------------------------------------------------------------- - . Function: smc_probe( int ioaddr ) - . - . Purpose: - . Tests to see if a given ioaddr points to an SMC9xxx chip. - . Returns a 0 on success - . - . Algorithm: - . (1) see if the high byte of BANK_SELECT is 0x33 - . (2) compare the ioaddr with the base register's address - . (3) see if I recognize the chip ID in the appropriate register - . - .--------------------------------------------------------------------- - */ - -/*--------------------------------------------------------------- - . Here I do typical initialization tasks. - . - . o Initialize the structure if needed - . o print out my vanity message if not done so already - . o print out what type of hardware is detected - . o print out the ethernet address - . o find the IRQ - . o set up my private data - . o configure the dev structure with my subroutines - . o actually GRAB the irq. - . o GRAB the region - .----------------------------------------------------------------- -*/ -static int __init smc_probe(struct net_device *dev, int ioaddr) -{ - int i, memory, retval; - static unsigned version_printed; - unsigned int bank; - - const char *version_string; - const char *if_string; - - /* registers */ - word revision_register; - word base_address_register; - word configuration_register; - word memory_info_register; - word memory_cfg_register; - - /* Grab the region so that no one else tries to probe our ioports. */ - if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME)) - return -EBUSY; - - dev->irq = irq; - dev->if_port = ifport; - - /* First, see if the high byte is 0x33 */ - bank = inw( ioaddr + BANK_SELECT ); - if ( (bank & 0xFF00) != 0x3300 ) { - retval = -ENODEV; - goto err_out; - } - /* The above MIGHT indicate a device, but I need to write to further - test this. */ - outw( 0x0, ioaddr + BANK_SELECT ); - bank = inw( ioaddr + BANK_SELECT ); - if ( (bank & 0xFF00 ) != 0x3300 ) { - retval = -ENODEV; - goto err_out; - } -#if !defined(CONFIG_H8S_EDOSK2674) - /* well, we've already written once, so hopefully another time won't - hurt. This time, I need to switch the bank register to bank 1, - so I can access the base address register */ - SMC_SELECT_BANK(1); - base_address_register = inw( ioaddr + BASE ); - if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) { - printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). " - "Probably not a SMC chip\n", - ioaddr, base_address_register >> 3 & 0x3E0 ); - /* well, the base address register didn't match. Must not have - been a SMC chip after all. */ - retval = -ENODEV; - goto err_out; - } -#else - (void)base_address_register; /* Warning suppression */ -#endif - - - /* check if the revision register is something that I recognize. - These might need to be added to later, as future revisions - could be added. */ - SMC_SELECT_BANK(3); - revision_register = inw( ioaddr + REVISION ); - if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) { - /* I don't recognize this chip, so... */ - printk(CARDNAME ": IO %x: Unrecognized revision register:" - " %x, Contact author.\n", ioaddr, revision_register); - - retval = -ENODEV; - goto err_out; - } - - /* at this point I'll assume that the chip is an SMC9xxx. - It might be prudent to check a listing of MAC addresses - against the hardware address, or do some other tests. */ - - if (version_printed++ == 0) - printk("%s", version); - - /* fill in some of the fields */ - dev->base_addr = ioaddr; - - /* - . Get the MAC address ( bank 1, regs 4 - 9 ) - */ - SMC_SELECT_BANK( 1 ); - for ( i = 0; i < 6; i += 2 ) { - word address; - - address = inw( ioaddr + ADDR0 + i ); - dev->dev_addr[ i + 1] = address >> 8; - dev->dev_addr[ i ] = address & 0xFF; - } - - /* get the memory information */ - - SMC_SELECT_BANK( 0 ); - memory_info_register = inw( ioaddr + MIR ); - memory_cfg_register = inw( ioaddr + MCR ); - memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */ - memory *= 256 * ( memory_info_register & 0xFF ); - - /* - Now, I want to find out more about the chip. This is sort of - redundant, but it's cleaner to have it in both, rather than having - one VERY long probe procedure. - */ - SMC_SELECT_BANK(3); - revision_register = inw( ioaddr + REVISION ); - version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ]; - if ( !version_string ) { - /* I shouldn't get here because this call was done before.... */ - retval = -ENODEV; - goto err_out; - } - - /* is it using AUI or 10BaseT ? */ - if ( dev->if_port == 0 ) { - SMC_SELECT_BANK(1); - configuration_register = inw( ioaddr + CONFIG ); - if ( configuration_register & CFG_AUI_SELECT ) - dev->if_port = 2; - else - dev->if_port = 1; - } - if_string = interfaces[ dev->if_port - 1 ]; - - /* now, reset the chip, and put it into a known state */ - smc_reset( ioaddr ); - - /* - . If dev->irq is 0, then the device has to be banged on to see - . what the IRQ is. - . - . This banging doesn't always detect the IRQ, for unknown reasons. - . a workaround is to reset the chip and try again. - . - . Interestingly, the DOS packet driver *SETS* the IRQ on the card to - . be what is requested on the command line. I don't do that, mostly - . because the card that I have uses a non-standard method of accessing - . the IRQs, and because this _should_ work in most configurations. - . - . Specifying an IRQ is done with the assumption that the user knows - . what (s)he is doing. No checking is done!!!! - . - */ - if ( dev->irq < 2 ) { - int trials; - - trials = 3; - while ( trials-- ) { - dev->irq = smc_findirq( ioaddr ); - if ( dev->irq ) - break; - /* kick the card and try again */ - smc_reset( ioaddr ); - } - } - if (dev->irq == 0 ) { - printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n"); - retval = -ENODEV; - goto err_out; - } - - /* now, print out the card info, in a short format.. */ - - printk("%s: %s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", dev->name, - version_string, revision_register & 0xF, ioaddr, dev->irq, - if_string, memory ); - /* - . Print the Ethernet address - */ - printk("ADDR: %pM\n", dev->dev_addr); - - /* Grab the IRQ */ - retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev); - if (retval) { - printk("%s: unable to get IRQ %d (irqval=%d).\n", DRV_NAME, - dev->irq, retval); - goto err_out; - } - - dev->netdev_ops = &smc_netdev_ops; - dev->watchdog_timeo = HZ/20; - - return 0; - -err_out: - release_region(ioaddr, SMC_IO_EXTENT); - return retval; -} - -#if SMC_DEBUG > 2 -static void print_packet( byte * buf, int length ) -{ -#if 0 - int i; - int remainder; - int lines; - - printk("Packet of length %d\n", length); - lines = length / 16; - remainder = length % 16; - - for ( i = 0; i < lines ; i ++ ) { - int cur; - - for ( cur = 0; cur < 8; cur ++ ) { - byte a, b; - - a = *(buf ++ ); - b = *(buf ++ ); - printk("%02x%02x ", a, b ); - } - printk("\n"); - } - for ( i = 0; i < remainder/2 ; i++ ) { - byte a, b; - - a = *(buf ++ ); - b = *(buf ++ ); - printk("%02x%02x ", a, b ); - } - printk("\n"); -#endif -} -#endif - - -/* - * Open and Initialize the board - * - * Set up everything, reset the card, etc .. - * - */ -static int smc_open(struct net_device *dev) -{ - int ioaddr = dev->base_addr; - - int i; /* used to set hw ethernet address */ - - /* clear out all the junk that was put here before... */ - memset(netdev_priv(dev), 0, sizeof(struct smc_local)); - - /* reset the hardware */ - - smc_reset( ioaddr ); - smc_enable( ioaddr ); - - /* Select which interface to use */ - - SMC_SELECT_BANK( 1 ); - if ( dev->if_port == 1 ) { - outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT, - ioaddr + CONFIG ); - } - else if ( dev->if_port == 2 ) { - outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT, - ioaddr + CONFIG ); - } - - /* - According to Becker, I have to set the hardware address - at this point, because the (l)user can set it with an - ioctl. Easily done... - */ - SMC_SELECT_BANK( 1 ); - for ( i = 0; i < 6; i += 2 ) { - word address; - - address = dev->dev_addr[ i + 1 ] << 8 ; - address |= dev->dev_addr[ i ]; - outw( address, ioaddr + ADDR0 + i ); - } - - netif_start_queue(dev); - return 0; -} - -/*-------------------------------------------------------- - . Called by the kernel to send a packet out into the void - . of the net. This routine is largely based on - . skeleton.c, from Becker. - .-------------------------------------------------------- -*/ - -static void smc_timeout(struct net_device *dev) -{ - /* If we get here, some higher level has decided we are broken. - There should really be a "kick me" function call instead. */ - printk(KERN_WARNING CARDNAME": transmit timed out, %s?\n", - tx_done(dev) ? "IRQ conflict" : - "network cable problem"); - /* "kick" the adaptor */ - smc_reset( dev->base_addr ); - smc_enable( dev->base_addr ); - dev->trans_start = jiffies; /* prevent tx timeout */ - /* clear anything saved */ - ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL; - netif_wake_queue(dev); -} - -/*------------------------------------------------------------- - . - . smc_rcv - receive a packet from the card - . - . There is ( at least ) a packet waiting to be read from - . chip-memory. - . - . o Read the status - . o If an error, record it - . o otherwise, read in the packet - -------------------------------------------------------------- -*/ -static void smc_rcv(struct net_device *dev) -{ - int ioaddr = dev->base_addr; - int packet_number; - word status; - word packet_length; - - /* assume bank 2 */ - - packet_number = inw( ioaddr + FIFO_PORTS ); - - if ( packet_number & FP_RXEMPTY ) { - /* we got called , but nothing was on the FIFO */ - PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n")); - /* don't need to restore anything */ - return; - } - - /* start reading from the start of the packet */ - outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER ); - - /* First two words are status and packet_length */ - status = inw( ioaddr + DATA_1 ); - packet_length = inw( ioaddr + DATA_1 ); - - packet_length &= 0x07ff; /* mask off top bits */ - - PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length )); - /* - . the packet length contains 3 extra words : - . status, length, and an extra word with an odd byte . - */ - packet_length -= 6; - - if ( !(status & RS_ERRORS ) ){ - /* do stuff to make a new packet */ - struct sk_buff * skb; - byte * data; - - /* read one extra byte */ - if ( status & RS_ODDFRAME ) - packet_length++; - - /* set multicast stats */ - if ( status & RS_MULTICAST ) - dev->stats.multicast++; - - skb = dev_alloc_skb( packet_length + 5); - - if ( skb == NULL ) { - printk(KERN_NOTICE CARDNAME ": Low memory, packet dropped.\n"); - dev->stats.rx_dropped++; - goto done; - } - - /* - ! This should work without alignment, but it could be - ! in the worse case - */ - - skb_reserve( skb, 2 ); /* 16 bit alignment */ - - data = skb_put( skb, packet_length); - -#ifdef USE_32_BIT - /* QUESTION: Like in the TX routine, do I want - to send the DWORDs or the bytes first, or some - mixture. A mixture might improve already slow PIO - performance */ - PRINTK3((" Reading %d dwords (and %d bytes)\n", - packet_length >> 2, packet_length & 3 )); - insl(ioaddr + DATA_1 , data, packet_length >> 2 ); - /* read the left over bytes */ - insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC), - packet_length & 0x3 ); -#else - PRINTK3((" Reading %d words and %d byte(s)\n", - (packet_length >> 1 ), packet_length & 1 )); - insw(ioaddr + DATA_1 , data, packet_length >> 1); - if ( packet_length & 1 ) { - data += packet_length & ~1; - *(data++) = inb( ioaddr + DATA_1 ); - } -#endif -#if SMC_DEBUG > 2 - print_packet( data, packet_length ); -#endif - - skb->protocol = eth_type_trans(skb, dev ); - netif_rx(skb); - dev->stats.rx_packets++; - dev->stats.rx_bytes += packet_length; - } else { - /* error ... */ - dev->stats.rx_errors++; - - if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++; - if ( status & (RS_TOOSHORT | RS_TOOLONG ) ) - dev->stats.rx_length_errors++; - if ( status & RS_BADCRC) dev->stats.rx_crc_errors++; - } - -done: - /* error or good, tell the card to get rid of this packet */ - outw( MC_RELEASE, ioaddr + MMU_CMD ); -} - - -/************************************************************************* - . smc_tx - . - . Purpose: Handle a transmit error message. This will only be called - . when an error, because of the AUTO_RELEASE mode. - . - . Algorithm: - . Save pointer and packet no - . Get the packet no from the top of the queue - . check if it's valid ( if not, is this an error??? ) - . read the status word - . record the error - . ( resend? Not really, since we don't want old packets around ) - . Restore saved values - ************************************************************************/ -static void smc_tx( struct net_device * dev ) -{ - int ioaddr = dev->base_addr; - struct smc_local *lp = netdev_priv(dev); - byte saved_packet; - byte packet_no; - word tx_status; - - - /* assume bank 2 */ - - saved_packet = inb( ioaddr + PNR_ARR ); - packet_no = inw( ioaddr + FIFO_PORTS ); - packet_no &= 0x7F; - - /* select this as the packet to read from */ - outb( packet_no, ioaddr + PNR_ARR ); - - /* read the first word from this packet */ - outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER ); - - tx_status = inw( ioaddr + DATA_1 ); - PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status)); - - dev->stats.tx_errors++; - if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++; - if ( tx_status & TS_LATCOL ) { - printk(KERN_DEBUG CARDNAME - ": Late collision occurred on last xmit.\n"); - dev->stats.tx_window_errors++; - } -#if 0 - if ( tx_status & TS_16COL ) { ... } -#endif - - if ( tx_status & TS_SUCCESS ) { - printk(CARDNAME": Successful packet caused interrupt\n"); - } - /* re-enable transmit */ - SMC_SELECT_BANK( 0 ); - outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR ); - - /* kill the packet */ - SMC_SELECT_BANK( 2 ); - outw( MC_FREEPKT, ioaddr + MMU_CMD ); - - /* one less packet waiting for me */ - lp->packets_waiting--; - - outb( saved_packet, ioaddr + PNR_ARR ); -} - -/*-------------------------------------------------------------------- - . - . This is the main routine of the driver, to handle the device when - . it needs some attention. - . - . So: - . first, save state of the chipset - . branch off into routines to handle each case, and acknowledge - . each to the interrupt register - . and finally restore state. - . - ---------------------------------------------------------------------*/ - -static irqreturn_t smc_interrupt(int irq, void * dev_id) -{ - struct net_device *dev = dev_id; - int ioaddr = dev->base_addr; - struct smc_local *lp = netdev_priv(dev); - - byte status; - word card_stats; - byte mask; - int timeout; - /* state registers */ - word saved_bank; - word saved_pointer; - int handled = 0; - - - PRINTK3((CARDNAME": SMC interrupt started\n")); - - saved_bank = inw( ioaddr + BANK_SELECT ); - - SMC_SELECT_BANK(2); - saved_pointer = inw( ioaddr + POINTER ); - - mask = inb( ioaddr + INT_MASK ); - /* clear all interrupts */ - outb( 0, ioaddr + INT_MASK ); - - - /* set a timeout value, so I don't stay here forever */ - timeout = 4; - - PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask)); - do { - /* read the status flag, and mask it */ - status = inb( ioaddr + INTERRUPT ) & mask; - if (!status ) - break; - - handled = 1; - - PRINTK3((KERN_WARNING CARDNAME - ": Handling interrupt status %x\n", status)); - - if (status & IM_RCV_INT) { - /* Got a packet(s). */ - PRINTK2((KERN_WARNING CARDNAME - ": Receive Interrupt\n")); - smc_rcv(dev); - } else if (status & IM_TX_INT ) { - PRINTK2((KERN_WARNING CARDNAME - ": TX ERROR handled\n")); - smc_tx(dev); - outb(IM_TX_INT, ioaddr + INTERRUPT ); - } else if (status & IM_TX_EMPTY_INT ) { - /* update stats */ - SMC_SELECT_BANK( 0 ); - card_stats = inw( ioaddr + COUNTER ); - /* single collisions */ - dev->stats.collisions += card_stats & 0xF; - card_stats >>= 4; - /* multiple collisions */ - dev->stats.collisions += card_stats & 0xF; - - /* these are for when linux supports these statistics */ - - SMC_SELECT_BANK( 2 ); - PRINTK2((KERN_WARNING CARDNAME - ": TX_BUFFER_EMPTY handled\n")); - outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT ); - mask &= ~IM_TX_EMPTY_INT; - dev->stats.tx_packets += lp->packets_waiting; - lp->packets_waiting = 0; - - } else if (status & IM_ALLOC_INT ) { - PRINTK2((KERN_DEBUG CARDNAME - ": Allocation interrupt\n")); - /* clear this interrupt so it doesn't happen again */ - mask &= ~IM_ALLOC_INT; - - smc_hardware_send_packet( dev ); - - /* enable xmit interrupts based on this */ - mask |= ( IM_TX_EMPTY_INT | IM_TX_INT ); - - /* and let the card send more packets to me */ - netif_wake_queue(dev); - - PRINTK2((CARDNAME": Handoff done successfully.\n")); - } else if (status & IM_RX_OVRN_INT ) { - dev->stats.rx_errors++; - dev->stats.rx_fifo_errors++; - outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT ); - } else if (status & IM_EPH_INT ) { - PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n")); - } else if (status & IM_ERCV_INT ) { - PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n")); - outb( IM_ERCV_INT, ioaddr + INTERRUPT ); - } - } while ( timeout -- ); - - - /* restore state register */ - SMC_SELECT_BANK( 2 ); - outb( mask, ioaddr + INT_MASK ); - - PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask)); - outw( saved_pointer, ioaddr + POINTER ); - - SMC_SELECT_BANK( saved_bank ); - - PRINTK3((CARDNAME ": Interrupt done\n")); - return IRQ_RETVAL(handled); -} - - -/*---------------------------------------------------- - . smc_close - . - . this makes the board clean up everything that it can - . and not talk to the outside world. Caused by - . an 'ifconfig ethX down' - . - -----------------------------------------------------*/ -static int smc_close(struct net_device *dev) -{ - netif_stop_queue(dev); - /* clear everything */ - smc_shutdown( dev->base_addr ); - - /* Update the statistics here. */ - return 0; -} - -/*----------------------------------------------------------- - . smc_set_multicast_list - . - . This routine will, depending on the values passed to it, - . either make it accept multicast packets, go into - . promiscuous mode ( for TCPDUMP and cousins ) or accept - . a select set of multicast packets -*/ -static void smc_set_multicast_list(struct net_device *dev) -{ - short ioaddr = dev->base_addr; - - SMC_SELECT_BANK(0); - if ( dev->flags & IFF_PROMISC ) - outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR ); - -/* BUG? I never disable promiscuous mode if multicasting was turned on. - Now, I turn off promiscuous mode, but I don't do anything to multicasting - when promiscuous mode is turned on. -*/ - - /* Here, I am setting this to accept all multicast packets. - I don't need to zero the multicast table, because the flag is - checked before the table is - */ - else if (dev->flags & IFF_ALLMULTI) - outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR ); - - /* We just get all multicast packets even if we only want them - . from one source. This will be changed at some future - . point. */ - else if (!netdev_mc_empty(dev)) { - /* support hardware multicasting */ - - /* be sure I get rid of flags I might have set */ - outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), - ioaddr + RCR ); - /* NOTE: this has to set the bank, so make sure it is the - last thing called. The bank is set to zero at the top */ - smc_setmulticast(ioaddr, dev); - } - else { - outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), - ioaddr + RCR ); - - /* - since I'm disabling all multicast entirely, I need to - clear the multicast list - */ - SMC_SELECT_BANK( 3 ); - outw( 0, ioaddr + MULTICAST1 ); - outw( 0, ioaddr + MULTICAST2 ); - outw( 0, ioaddr + MULTICAST3 ); - outw( 0, ioaddr + MULTICAST4 ); - } -} - -#ifdef MODULE - -static struct net_device *devSMC9194; -MODULE_LICENSE("GPL"); - -module_param(io, int, 0); -module_param(irq, int, 0); -module_param(ifport, int, 0); -MODULE_PARM_DESC(io, "SMC 99194 I/O base address"); -MODULE_PARM_DESC(irq, "SMC 99194 IRQ number"); -MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)"); - -int __init init_module(void) -{ - if (io == 0) - printk(KERN_WARNING - CARDNAME": You shouldn't use auto-probing with insmod!\n" ); - - /* copy the parameters from insmod into the device structure */ - devSMC9194 = smc_init(-1); - if (IS_ERR(devSMC9194)) - return PTR_ERR(devSMC9194); - return 0; -} - -void __exit cleanup_module(void) -{ - unregister_netdev(devSMC9194); - free_irq(devSMC9194->irq, devSMC9194); - release_region(devSMC9194->base_addr, SMC_IO_EXTENT); - free_netdev(devSMC9194); -} - -#endif /* MODULE */ |