smc9194.rar_The Information

/*------------------------------------------------------------------------ . 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 ( [email protected] ) . contributors: . Arnaldo Carvalho de Melo <[email protected]> . . Hardware multicast code from Peter Cammaert ( [email protected] ) . . Sources: . o SMC databook . o skeleton.c by Donald Becker ( [email protected] ) . 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 ([email protected])"; #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 /* .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; }; 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}, }; /* . 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. *