1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * sgiseeq.h: Defines for the Seeq8003 ethernet controller.
4 *
5 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
6 */
7#ifndef _SGISEEQ_H
8#define _SGISEEQ_H
9
10struct sgiseeq_wregs {
11	volatile unsigned int multicase_high[2];
12	volatile unsigned int frame_gap;
13	volatile unsigned int control;
14};
15
16struct sgiseeq_rregs {
17	volatile unsigned int collision_tx[2];
18	volatile unsigned int collision_all[2];
19	volatile unsigned int _unused0;
20	volatile unsigned int rflags;
21};
22
23struct sgiseeq_regs {
24	union {
25		volatile unsigned int eth_addr[6];
26		volatile unsigned int multicast_low[6];
27		struct sgiseeq_wregs wregs;
28		struct sgiseeq_rregs rregs;
29	} rw;
30	volatile unsigned int rstat;
31	volatile unsigned int tstat;
32};
33
34/* Seeq8003 receive status register */
35#define SEEQ_RSTAT_OVERF   0x001 /* Overflow */
36#define SEEQ_RSTAT_CERROR  0x002 /* CRC error */
37#define SEEQ_RSTAT_DERROR  0x004 /* Dribble error */
38#define SEEQ_RSTAT_SFRAME  0x008 /* Short frame */
39#define SEEQ_RSTAT_REOF    0x010 /* Received end of frame */
40#define SEEQ_RSTAT_FIG     0x020 /* Frame is good */
41#define SEEQ_RSTAT_TIMEO   0x040 /* Timeout, or late receive */
42#define SEEQ_RSTAT_WHICH   0x080 /* Which status, 1=old 0=new */
43#define SEEQ_RSTAT_LITTLE  0x100 /* DMA is done in little endian format */
44#define SEEQ_RSTAT_SDMA    0x200 /* DMA has started */
45#define SEEQ_RSTAT_ADMA    0x400 /* DMA is active */
46#define SEEQ_RSTAT_ROVERF  0x800 /* Receive buffer overflow */
47
48/* Seeq8003 receive command register */
49#define SEEQ_RCMD_RDISAB   0x000 /* Disable receiver on the Seeq8003 */
50#define SEEQ_RCMD_IOVERF   0x001 /* IRQ on buffer overflows */
51#define SEEQ_RCMD_ICRC     0x002 /* IRQ on CRC errors */
52#define SEEQ_RCMD_IDRIB    0x004 /* IRQ on dribble errors */
53#define SEEQ_RCMD_ISHORT   0x008 /* IRQ on short frames */
54#define SEEQ_RCMD_IEOF     0x010 /* IRQ on end of frame */
55#define SEEQ_RCMD_IGOOD    0x020 /* IRQ on good frames */
56#define SEEQ_RCMD_RANY     0x040 /* Receive any frame */
57#define SEEQ_RCMD_RBCAST   0x080 /* Receive broadcasts */
58#define SEEQ_RCMD_RBMCAST  0x0c0 /* Receive broadcasts/multicasts */
59
60/* Seeq8003 transmit status register */
61#define SEEQ_TSTAT_UFLOW   0x001 /* Transmit buffer underflow */
62#define SEEQ_TSTAT_CLS     0x002 /* Collision detected */
63#define SEEQ_TSTAT_R16     0x004 /* Did 16 retries to tx a frame */
64#define SEEQ_TSTAT_PTRANS  0x008 /* Packet was transmitted ok */
65#define SEEQ_TSTAT_LCLS    0x010 /* Late collision occurred */
66#define SEEQ_TSTAT_WHICH   0x080 /* Which status, 1=old 0=new */
67#define SEEQ_TSTAT_TLE     0x100 /* DMA is done in little endian format */
68#define SEEQ_TSTAT_SDMA    0x200 /* DMA has started */
69#define SEEQ_TSTAT_ADMA    0x400 /* DMA is active */
70
71/* Seeq8003 transmit command register */
72#define SEEQ_TCMD_RB0      0x00 /* Register bank zero w/station addr */
73#define SEEQ_TCMD_IUF      0x01 /* IRQ on tx underflow */
74#define SEEQ_TCMD_IC       0x02 /* IRQ on collisions */
75#define SEEQ_TCMD_I16      0x04 /* IRQ after 16 failed attempts to tx frame */
76#define SEEQ_TCMD_IPT      0x08 /* IRQ when packet successfully transmitted */
77#define SEEQ_TCMD_RB1      0x20 /* Register bank one w/multi-cast low byte */
78#define SEEQ_TCMD_RB2      0x40 /* Register bank two w/multi-cast high byte */
79
80/* Seeq8003 control register */
81#define SEEQ_CTRL_XCNT     0x01
82#define SEEQ_CTRL_ACCNT    0x02
83#define SEEQ_CTRL_SFLAG    0x04
84#define SEEQ_CTRL_EMULTI   0x08
85#define SEEQ_CTRL_ESHORT   0x10
86#define SEEQ_CTRL_ENCARR   0x20
87
88/* Seeq8003 control registers on the SGI Hollywood HPC. */
89#define SEEQ_HPIO_P1BITS  0x00000001 /* cycles to stay in P1 phase for PIO */
90#define SEEQ_HPIO_P2BITS  0x00000060 /* cycles to stay in P2 phase for PIO */
91#define SEEQ_HPIO_P3BITS  0x00000100 /* cycles to stay in P3 phase for PIO */
92#define SEEQ_HDMA_D1BITS  0x00000006 /* cycles to stay in D1 phase for DMA */
93#define SEEQ_HDMA_D2BITS  0x00000020 /* cycles to stay in D2 phase for DMA */
94#define SEEQ_HDMA_D3BITS  0x00000000 /* cycles to stay in D3 phase for DMA */
95#define SEEQ_HDMA_TIMEO   0x00030000 /* cycles for DMA timeout */
96#define SEEQ_HCTL_NORM    0x00000000 /* Normal operation mode */
97#define SEEQ_HCTL_RESET   0x00000001 /* Reset Seeq8003 and HPC interface */
98#define SEEQ_HCTL_IPEND   0x00000002 /* IRQ is pending for the chip */
99#define SEEQ_HCTL_IPG     0x00001000 /* Inter-packet gap */
100#define SEEQ_HCTL_RFIX    0x00002000 /* At rxdc, clear end-of-packet */
101#define SEEQ_HCTL_EFIX    0x00004000 /* fixes intr status bit settings */
102#define SEEQ_HCTL_IFIX    0x00008000 /* enable startup timeouts */
103
104#endif /* !(_SGISEEQ_H) */
105