ethernet/amd/7990.h

1 /* SPDX-License-Identifier: GPL-2.0 */
3  * 7990.h -- LANCE ethernet IC generic routines.
11  * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful.
32  * too long (and overflow the RAM on shared-memory cards like the HP LANCE.
41 #define TX_RING_MOD_MASK	(TX_RING_SIZE - 1)
42 #define RX_RING_MOD_MASK	(RX_RING_SIZE - 1)
49 /* Each receive buffer is described by a receive message descriptor (RMD) */
51 	volatile unsigned short rmd0;	    /* low address of packet */
52 	volatile unsigned char  rmd1_bits;  /* descriptor bits */
54 	volatile short    length;	    /* This length is 2s complement (negative)!
56 	volatile unsigned short mblength;   /* Actual number of bytes received */
61 	volatile unsigned short tmd0;	    /* low address of packet */
62 	volatile unsigned char  tmd1_bits;  /* descriptor bits */
64 	volatile short    length;	    /* Length is 2s complement (negative)! */
65 	volatile unsigned short misc;
69  * the initialization block, the receive and transmit descriptor rings,
74 	volatile unsigned short mode;		/* Pre-set mode (reg. 15) */
79 	volatile unsigned short rx_ptr;		/* receive descriptor addr */
80 	volatile unsigned short rx_len;		/* receive len and high addr */
81 	volatile unsigned short tx_ptr;		/* transmit descriptor addr */
82 	volatile unsigned short tx_len;		/* transmit len and high addr */
84 	/* The Tx and Rx ring entries must be aligned on 8-byte boundaries.
85 	 * This will be true if this whole struct is 8-byte aligned.
114 	int auto_select;		/* cable-selection is by carrier */
115 	unsigned short busmaster_regval;
120 	 * a DIO-specific register every time you read/write the LANCE regs :-<
123 	void (*writerap)(void *, unsigned short);
124 	void (*writerdp)(void *, unsigned short);
125 	unsigned short (*readrdp)(void *);
143 #define LE_C0_CERR	0x2000	/* No Heartbeat (10BASE-T) */
172 /* these next ones 0x4000 -- 0x0080 are not available on the LANCE 7990,
173  * but they are in NetBSD's am7990.h, presumably for backwards-compatible chips
183 /* and this one is from the C-LANCE data sheet... */
185 				   (C-LANCE, not original LANCE) */
198 #define LE_R1_OWN	0x80	/* LANCE owns the descriptor */
212 #define LE_T1_OWN	0x80	/* LANCE owns the descriptor */
234 #define TX_BUFFS_AVAIL ((lp->tx_old <= lp->tx_new) ? \
235 			lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new : \
236 			lp->tx_old - lp->tx_new - 1)