Annotation of sys/arch/mac68k/dev/sbcvar.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: sbcvar.h,v 1.8 2006/12/13 21:12:56 miod Exp $ */
2: /* $NetBSD: sbcvar.h,v 1.1 1997/03/01 20:19:00 scottr Exp $ */
3:
4: /*
5: * Copyright (C) 1996 Scott Reynolds. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by Scott Reynolds for
18: * the NetBSD Project.
19: * 4. The name of the author may not be used to endorse or promote products
20: * derived from this software without specific prior written permission
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34: /*
35: * Transfers smaller than this are done using PIO
36: * (on assumption they're not worth PDMA overhead)
37: */
38: #define MIN_DMA_LEN 128
39:
40: /*
41: * Transfers larger than 8192 bytes need to be split up
42: * due to the size of the PDMA space.
43: */
44: #define MAX_DMA_LEN 0x2000
45:
46: #ifdef SBC_DEBUG
47: # define SBC_DB_INTR 0x01
48: # define SBC_DB_DMA 0x02
49: # define SBC_DB_REG 0x04
50: # define SBC_DB_BREAK 0x08
51: # ifndef DDB
52: # define Debugger() printf("Debug: sbc.c:%d\n", __LINE__)
53: # endif
54: # define SBC_BREAK \
55: do { if (sbc_debug & SBC_DB_BREAK) Debugger(); } while (0)
56: #else
57: # define SBC_BREAK
58: #endif
59:
60: /*
61: * This structure is used to keep track of PDMA requests.
62: */
63: struct sbc_pdma_handle {
64: int dh_flags; /* flags */
65: #define SBC_DH_BUSY 0x01 /* This handle is in use */
66: #define SBC_DH_OUT 0x02 /* PDMA data out (write) */
67: #define SBC_DH_DONE 0x04 /* PDMA transfer is complete */
68: u_char *dh_addr; /* data buffer */
69: int dh_len; /* length of data buffer */
70: };
71:
72: /*
73: * The first structure member has to be the ncr5380_softc
74: * so we can just cast to go back and forth between them.
75: */
76: struct sbc_softc {
77: struct ncr5380_softc ncr_sc;
78: struct via2hand sc_ih_drq, sc_ih_irq;
79: volatile struct sbc_regs *sc_regs;
80: volatile vaddr_t sc_drq_addr;
81: volatile vaddr_t sc_nodrq_addr;
82: void (*sc_clrintr)(struct ncr5380_softc *);
83: int sc_options; /* options for this instance. */
84: struct sbc_pdma_handle sc_pdma[SCI_OPENINGS];
85: };
86:
87: /*
88: * Options. By default, SCSI interrupts and reselect are disabled.
89: * You may enable either of these features with the `flags' directive
90: * in your kernel's configuration file.
91: *
92: * Alternatively, you can patch your kernel with DDB or some other
93: * mechanism. The sc_options member of the softc is OR'd with
94: * the value in sbc_options.
95: *
96: * The options code is based on the sparc 'si' driver's version of
97: * the same.
98: */
99: #define SBC_PDMA 0x01 /* Use PDMA for polled transfers */
100: #define SBC_INTR 0x02 /* Allow SCSI IRQ/DRQ interrupts */
101: #define SBC_RESELECT 0x04 /* Allow disconnect/reselect */
102: #define SBC_OPTIONS_MASK (SBC_RESELECT|SBC_INTR|SBC_PDMA)
103: #define SBC_OPTIONS_BITS "\10\3RESELECT\2INTR\1PDMA"
104:
105: extern int sbc_debug;
106: extern int sbc_link_flags;
107: extern int sbc_options;
108: extern struct scsi_adapter sbc_ops;
109: extern struct scsi_device sbc_dev;
110:
111: int sbc_pdma_in(struct ncr5380_softc *, int, int, u_char *);
112: int sbc_pdma_out(struct ncr5380_softc *, int, int, u_char *);
113: int sbc_irq_intr(void *);
114: int sbc_drq_intr(void *);
115: void sbc_dma_alloc(struct ncr5380_softc *);
116: void sbc_dma_free(struct ncr5380_softc *);
117: void sbc_dma_poll(struct ncr5380_softc *);
118: void sbc_dma_setup(struct ncr5380_softc *);
119: void sbc_dma_start(struct ncr5380_softc *);
120: void sbc_dma_stop(struct ncr5380_softc *);
121: #ifdef SBC_DEBUG
122: void decode_5380_intr(struct ncr5380_softc *);
123: #endif
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