path: root/drivers/net/sunlance.c

/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
 * lance.c: Linux/Sparc/Lance driver
 *
 *	Written 1995, 1996 by Miguel de Icaza
 * Sources:
 *	The Linux  depca driver
 *	The Linux  lance driver.
 *	The Linux  skeleton driver.
 *	The NetBSD Sparc/Lance driver.
 *	Theo de Raadt (deraadt@openbsd.org)
 *	NCR92C990 Lan Controller manual
 *
 * 1.4:
 *	Added support to run with a ledma on the Sun4m
 *
 * 1.5:
 *	Added multiple card detection.
 *
 *	 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
 *		  (ecd@skynet.be)
 *
 *	 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
 *		  (ecd@skynet.be)
 *
 *	 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
 *		  (davem@caip.rutgers.edu)
 *
 *	 5/29/96: override option 'tpe-link-test?', if it is 'false', as
 *		  this disables auto carrier detection on sun4m. Eddie C. Dost
 *		  (ecd@skynet.be)
 *
 * 1.7:
 *	 6/26/96: Bug fix for multiple ledmas, miguel.
 *
 * 1.8:
 *		  Stole multicast code from depca.c, fixed lance_tx.
 *
 * 1.9:
 *	 8/21/96: Fixed the multicast code (Pedro Roque)
 *
 *	 8/28/96: Send fake packet in lance_open() if auto_select is true,
 *		  so we can detect the carrier loss condition in time.
 *		  Eddie C. Dost (ecd@skynet.be)
 *
 *	 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
 *		  MNA trap during chksum_partial_copy(). (ecd@skynet.be)
 *
 *	11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
 *
 *	12/22/96: Don't loop forever in lance_rx() on incomplete packets.
 *		  This was the sun4c killer. Shit, stupid bug.
 *		  (ecd@skynet.be)
 *
 * 1.10:
 *	 1/26/97: Modularize driver. (ecd@skynet.be)
 *
 * 1.11:
 *	12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
 *
 * 1.12:
 * 	 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
 * 	          Anton Blanchard (anton@progsoc.uts.edu.au)
 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
 *		  David S. Miller (davem@redhat.com)
 * 2.01:
 *      11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
 *
 */

#undef DEBUG_DRIVER

static char lancestr[] = "LANCE";

#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/delay.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <linux/errno.h>
#include <linux/socket.h> /* Used for the temporal inet entries and routing */
#include <linux/route.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <linux/dma-mapping.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/gfp.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/pgtable.h>
#include <asm/byteorder.h>	/* Used by the checksum routines */
#include <asm/idprom.h>
#include <asm/prom.h>
#include <asm/auxio.h>		/* For tpe-link-test? setting */
#include <asm/irq.h>

#define DRV_NAME	"sunlance"
#define DRV_VERSION	"2.02"
#define DRV_RELDATE	"8/24/03"
#define DRV_AUTHOR	"Miguel de Icaza (miguel@nuclecu.unam.mx)"

static char version[] =
	DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";

MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION("Sun Lance ethernet driver");
MODULE_LICENSE("GPL");

/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
#ifndef LANCE_LOG_TX_BUFFERS
#define LANCE_LOG_TX_BUFFERS 4
#define LANCE_LOG_RX_BUFFERS 4
#endif

#define LE_CSR0 0
#define LE_CSR1 1
#define LE_CSR2 2
#define LE_CSR3 3

#define LE_MO_PROM      0x8000  /* Enable promiscuous mode */

#define	LE_C0_ERR	0x8000	/* Error: set if BAB, SQE, MISS or ME is set */
#define	LE_C0_BABL	0x4000	/* BAB:  Babble: tx timeout. */
#define	LE_C0_CERR	0x2000	/* SQE:  Signal quality error */
#define	LE_C0_MISS	0x1000	/* MISS: Missed a packet */
#define	LE_C0_MERR	0x0800	/* ME:   Memory error */
#define	LE_C0_RINT	0x0400	/* Received interrupt */
#define	LE_C0_TINT	0x0200	/* Transmitter Interrupt */
#define	LE_C0_IDON	0x0100	/* IFIN: Init finished. */
#define	LE_C0_INTR	0x0080	/* Interrupt or error */
#define	LE_C0_INEA	0x0040	/* Interrupt enable */
#define	LE_C0_RXON	0x0020	/* Receiver on */
#define	LE_C0_TXON	0x0010	/* Transmitter on */
#define	LE_C0_TDMD	0x0008	/* Transmitter demand */
#define	LE_C0_STOP	0x0004	/* Stop the card */
#define	LE_C0_STRT	0x0002	/* Start the card */
#define	LE_C0_INIT	0x0001	/* Init the card */

#define	LE_C3_BSWP	0x4     /* SWAP */
#define	LE_C3_ACON	0x2	/* ALE Control */
#define	LE_C3_BCON	0x1	/* Byte control */

/* Receive message descriptor 1 */
#define LE_R1_OWN       0x80    /* Who owns the entry */
#define LE_R1_ERR       0x40    /* Error: if FRA, OFL, CRC or BUF is set */
#define LE_R1_FRA       0x20    /* FRA: Frame error */
#define LE_R1_OFL       0x10    /* OFL: Frame overflow */
#define LE_R1_CRC       0x08    /* CRC error */
#define LE_R1_BUF       0x04    /* BUF: Buffer error */
#define LE_R1_SOP       0x02    /* Start of packet */
#define LE_R1_EOP       0x01    /* End of packet */
#define LE_R1_POK       0x03    /* Packet is complete: SOP + EOP */

#define LE_T1_OWN       0x80    /* Lance owns the packet */
#define LE_T1_ERR       0x40    /* Error summary */
#define LE_T1_EMORE     0x10    /* Error: more than one retry needed */
#define LE_T1_EONE      0x08    /* Error: one retry needed */
#define LE_T1_EDEF      0x04    /* Error: deferred */
#define LE_T1_SOP       0x02    /* Start of packet */
#define LE_T1_EOP       0x01    /* End of packet */
#define LE_T1_POK	0x03	/* Packet is complete: SOP + EOP */

#define LE_T3_BUF       0x8000  /* Buffer error */
#define LE_T3_UFL       0x4000  /* Error underflow */
#define LE_T3_LCOL      0x1000  /* Error late collision */
#define LE_T3_CLOS      0x0800  /* Error carrier loss */
#define LE_T3_RTY       0x0400  /* Error retry */
#define LE_T3_TDR       0x03ff  /* Time Domain Reflectometry counter */

#defin