path: root/drivers/net/tulip/tulip.h

/*
	drivers/net/tulip/tulip.h

	Copyright 2000,2001  The Linux Kernel Team
	Written/copyright 1994-2001 by Donald Becker.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

	Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
	for more information on this driver, or visit the project
	Web page at http://sourceforge.net/projects/tulip/

*/

#ifndef __NET_TULIP_H__
#define __NET_TULIP_H__

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/irq.h>



/* undefine, or define to various debugging levels (>4 == obscene levels) */
#define TULIP_DEBUG 1

#ifdef CONFIG_TULIP_MMIO
#define TULIP_BAR	1	/* CBMA */
#else
#define TULIP_BAR	0	/* CBIO */
#endif



struct tulip_chip_table {
	char *chip_name;
	int io_size;
	int valid_intrs;	/* CSR7 interrupt enable settings */
	int flags;
	void (*media_timer) (unsigned long);
	work_func_t media_task;
};


enum tbl_flag {
	HAS_MII			= 0x0001,
	HAS_MEDIA_TABLE		= 0x0002,
	CSR12_IN_SROM		= 0x0004,
	ALWAYS_CHECK_MII	= 0x0008,
	HAS_ACPI		= 0x0010,
	MC_HASH_ONLY		= 0x0020, /* Hash-only multicast filter. */
	HAS_PNICNWAY		= 0x0080,
	HAS_NWAY		= 0x0040, /* Uses internal NWay xcvr. */
	HAS_INTR_MITIGATION	= 0x0100,
	IS_ASIX			= 0x0200,
	HAS_8023X		= 0x0400,
	COMET_MAC_ADDR		= 0x0800,
	HAS_PCI_MWI		= 0x1000,
	HAS_PHY_IRQ		= 0x2000,
	HAS_SWAPPED_SEEPROM	= 0x4000,
	NEEDS_FAKE_MEDIA_TABLE	= 0x8000,
};


/* chip types.  careful!  order is VERY IMPORTANT here, as these
 * are used throughout the driver as indices into arrays */
/* Note 21142 == 21143. */
enum chips {
	DC21040 = 0,
	DC21041 = 1,
	DC21140 = 2,
	DC21142 = 3, DC21143 = 3,
	LC82C168,
	MX98713,
	MX98715,
	MX98725,
	AX88140,
	PNIC2,
	COMET,
	COMPEX9881,
	I21145,
	DM910X,
	CONEXANT,
};


enum MediaIs {
	MediaIsFD = 1,
	MediaAlwaysFD = 2,
	MediaIsMII = 4,
	MediaIsFx = 8,
	MediaIs100 = 16
};


/* Offsets to the Command and Status Registers, "CSRs".  All accesses
   must be longword instructions and quadword aligned. */
enum tulip_offsets {
	CSR0 = 0,
	CSR1 = 0x08,
	CSR2 = 0x10,
	CSR3 = 0x18,
	CSR4 = 0x20,
	CSR5 = 0x28,
	CSR6 = 0x30,
	CSR7 = 0x38,
	CSR8 = 0x40,
	CSR9 = 0x48,
	CSR10 = 0x50,
	CSR11 = 0x58,
	CSR12 = 0x60,
	CSR13 = 0x68,
	CSR14 = 0x70,
	CSR15 = 0x78,
};

/* register offset and bits for CFDD PCI config reg */
enum pci_cfg_driver_reg {
	CFDD = 0x40,
	CFDD_Sleep = (1 << 31),
	CFDD_Snooze = (1 << 30),
};

#define RxPollInt (RxIntr|RxNoBuf|RxDied|RxJabber)

/* The bits in the CSR5 status registers, mostly interrupt sources. */
enum status_bits {
	TimerInt = 0x800,
	SytemError = 0x2000,
	TPLnkFail = 0x1000,
	TPLnkPass = 0x10,
	NormalIntr = 0x10000,
	AbnormalIntr = 0x8000,
	RxJabber = 0x200,
	RxDied = 0x100,
	RxNoBuf = 0x80,
	RxIntr = 0x40,
	TxFIFOUnderflow = 0x20,
	RxErrIntr = 0x10,
	TxJabber = 0x08,
	TxNoBuf = 0x04,
	TxDied = 0x02,
	TxIntr = 0x01,
};

/* bit mask for CSR5 TX/RX process state */
#define CSR5_TS	0x00700000
#define CSR5_RS	0x000e0000

enum tulip_mode_bits {
	TxThreshold		= (1 << 22),
	FullDuplex		= (1 << 9),
	TxOn			= 0x2000,
	AcceptBroadcast		= 0x0100,
	AcceptAllMulticast	= 0x0080,
	AcceptAllPhys		= 0x0040,
	AcceptRunt		= 0x0008,
	RxOn			= 0x0002,
	RxTx			= (TxOn | RxOn),
};


enum tulip_busconfig_bits {
	MWI			= (1 << 24),
	MRL			= (1 << 23),
	MRM			= (1 << 21),
	CALShift		= 14,
	BurstLenShift		= 8,
};


/* The Tulip Rx and Tx buffer descriptors. */
struct tulip_rx_desc {
	s32 status;
	s32 length;
	u32 buffer1;
	u32 buffer2;
};


struct tulip_tx_desc {
	s32 status;
	s32 length;
	u32 buffer1;
	u32 buffer2;		/* We use only buffer 1.  */
};


enum desc_status_bits {
	DescOwned    = 0x80000000,
	DescWholePkt = 0x60000000,
	DescEndPkt   = 0x40000000,
	DescStartPkt = 0x20000000,
	DescEndRing  = 0x02000000,
	DescUseLink  = 0x01000000,
	RxDescFatalErr = 0x008000,
	RxWholePkt   = 0x00000300,
};


enum t21143_csr6_bits {
	csr6_sc = (1<<31),
	csr6_ra = (1<<30),
	csr6_ign_dest_msb = (1<<26),
	csr6_mbo = (1<<25),
	csr6_scr = (1<<24),  /* scramble mode flag: can't be set */
	csr6_pcs = (1<<23),  /* Enables PCS functions (symbol mode requires csr6_ps be set) default is set */
	csr6_ttm = (1<<22),  /* Transmit Threshold Mode, set for 10baseT, 0 for 100BaseTX */
	csr6_sf = (1<<21),   /* Store and forward. If set ignores TR bits */
	csr6_hbd = (1<<19),  /* Heart beat disable. Disables SQE function in 10baseT */
	csr6_ps = (1<<18),   /* Port Select. 0 (defualt) = 10baseT, 1 = 100baseTX: can't be set */
	csr6_ca = (1<<17),   /* Collision Offset Enable. If set uses special algorithm in low collision situations */
	csr6_trh = (1<<15),  /* Transmit Threshold high bit */
	csr6_trl = (1<<14),  /* Transmit Threshold low bit */

	/***************************************************************
	 * This table shows transmit threshold values based on media   *
	 * and these two registers (from PNIC1 & 2 docs) Note: this is *
	 * all meaningless if sf is set.                               *
	 ***************************************************************/

	/***********************************
	 * (trh,trl) * 100BaseTX * 10BaseT *
	 ***********************************
	 *   (0,0)   *     128   *    72   *
	 *   (0,1)   *     256   *    96   *
	 *   (1,0)   *     512   *   128   *
	 *   (1,1)   *    1024   *   160   *
	 ***********************************/

	csr6_fc = (1<<12),   /* Forces a collision in next transmission (for testing in loopback mode) */
	csr6_om_int_loop = (1<<10), /* internal (FIFO) loopback flag */
	csr6_om_ext_loop = (1<<11), /* external (PMD) loopback flag */
	/* set both and you get (PHY) loopback */
	csr6_fd = (1<<9),    /* Full duplex mode, disables hearbeat, no loopback */
	csr6_pm = (1<<7),    /* Pass All Multicast */
	csr6_pr = (1<<6),    /* Promiscuous mode */
	csr6_sb = (1<<5),    /* Start(1)/Stop(0) backoff counter */
	csr6_if = (1<<4),    /* Inverse Filtering, rejects only addresses in address table: can't be set */
	csr6_pb = (1<<3),    /* Pass Bad Frames, (1) causes even bad frames to be passed on */
	csr6_ho = (1<<2),    /* Hash-only filtering mode: can't be set */
	csr6_hp = (1<<0),    /* Hash/Perfect Receive Filtering Mode: can't be set */

	csr6_mask_capture = (csr6_sc | csr6_ca),
	csr6_mask_defstate = (csr6_mask_capture | csr6_mbo),
	csr6_mask_hdcap = (csr6_mask_defstate | csr6_hbd | csr6_ps),
	csr6_mask_hdcaptt = (csr6_mask_hdcap  | csr6_trh | csr6_trl),
	csr6_mask_fullcap = (csr6_mask_hdcaptt | csr6_fd),
	csr6_mask_fullpromisc = (csr6_pr | csr6_pm),
	csr6_mask_filters = (csr6_hp | csr6_ho | csr6_if),
	csr6_mask_100bt = (csr6_scr | csr6_pcs | csr6_hbd),
};


/* Keep the ring sizes a power of two for efficiency.
   Making the Tx ring too large decreases the effectiveness of channel
   bonding and packet priority.
   There are no ill effects from too-large receive rings. */

#define TX_RING_SIZE	32
#define RX_RING_SIZE	128
#define MEDIA_MASK     31

#define PKT_BUF_SZ		1536	/* Size of each temporary Rx buffer. */

#define TULIP_MIN_CACHE_LINE	8	/* in units of 32-bit words */

#if defined(__sparc__) || defined(__hppa__)
/* The UltraSparc PCI controllers will disconnect at every 64-byte
 * crossing anyways so it makes no sense to tell Tulip to burst
 * any more than that.
 */
#define TULIP_MAX_CACHE_LINE	16	/* in units of 32-bit words */
#else
#define TULIP_MAX_CACHE_LINE	32	/* in units of 32-bit words */
#endif


/* Ring-wrap flag in length field, use for last ring entry.
	0x01000000 means chain on buffer2 address,
	0x02000000 means use the ring start address in CSR2/3.
   Note: Some work-alike chips do not function correctly in chained mode.
   The ASIX chip works only in chained mode.
   Thus we indicates ring mode, but always write the 'next' field for
   chained mode as well.
*/
#define DESC_RING_WRAP 0x02000000


#define EEPROM_SIZE 512 	/* 2 << EEPROM_ADDRLEN */


#define RUN_AT(x) (jiffies + (x))

#if defined(__i386__)			/* AKA get_unaligned() */
#define get_u16(ptr) (*(u16 *)(ptr))
#else
#define get_u16(ptr) (((u8*)(ptr))[0] + (((u8*)(ptr))[1]<<8))
#endif

struct medialeaf {
	u8 type;
	u8 media;
	unsigned char *leafdata;
};


struct m