1 /* ascreg.h - port and bit definitions for the GI-1904 interface
3 * Copyright (c) 1995 Gunther Schadow. All rights reserved.
4 * Copyright (c) 1995 Luigi Rizzo. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Gunther Schadow.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 /*** Registers (base=3EB): ************/
38 #define ASC_CFG (scu->base)
39 /*** ASC_CFG 3EB: configuration register. Write only, mirror in RAM
41 *** - - I_5 I_3 I10 D_3 - D_1
43 /*** #define ASC_CNF_MASK 0x3D */ /* was 0x5a */
44 #define ASC_CNF_DMA1 0x01 /* was (~0x02 & ASC_CNF_MASK) */
45 #define ASC_CNF_DMA3 0x04 /* was (~0x08 & ASC_CNF_MASK) */
46 #define ASC_CNF_IRQ3 0x10 /* was (~0x10 & ASC_CNF_MASK) */
47 #define ASC_CNF_IRQ5 0x20 /* was (~0x40 & ASC_CNF_MASK) */
48 #define ASC_CNF_IRQ10 0x08 /* was (~0x40 & ASC_CNF_MASK) */
50 /*** ASC_STAT 3EC: command/status; rw, mirror in ram
53 *** [<-- Resolution -->] 13h,10h,0eh,0ch,09h, 07h, 04h, 02h
55 #define ASC_STAT (scu->base + 1)
57 #define ASC_RDY_FLAG 0x80
58 #define ASC_RES_MASK 0x3f
59 #define ASC_RES_800 0x13
60 #define ASC_RES_700 0x10
61 #define ASC_RES_600 0x0e
62 #define ASC_RES_500 0x0c
63 #define ASC_RES_400 0x09 /* 0x00 */
64 #define ASC_RES_300 0x07 /* 0x04 */
65 #define ASC_RES_200 0x04 /* 0x20 */
66 #define ASC_RES_100 0x02 /* 0x24 */
68 /*** ASC_CMD 3EC: command/status; rw, mirror in ram
69 *** W: 7 6 5 4 3 2 1 0
71 *** b0: 1: light on & get resolution, 0: light off
72 *** b1: 0: load scan len (sub_16, with b4=1, b7=1)
73 *** b2: 1/0 : dma stuff
74 *** b3: 0/1 : dma stuff
75 *** b4: 1 : load scan len (sub_16, with b1=0, b7=1)
78 *** b7: ? : set at beginning of sub_16
80 #define ASC_CMD (scu->base + 1)
82 #define ASC_LIGHT_ON 0x01
83 #define ASC_SET_B2 0x04
84 #define ASC_OPERATE 0x91 /* from linux driver... */
85 #define ASC_STANDBY 0x05 /* from linux driver... */
87 /*** ASC_LEN_L, ASC_LEN_H 3ED, 3EE: transfer length, lsb first ***/
88 #define ASC_LEN_L ((scu->base)+2)
89 #define ASC_LEN_H ((scu->base)+3)
91 /*** 3EE ASC_PROBE (must read ASC_PROBE_VALUE) ***/
92 #define ASC_PROBE ((scu->base)+3)
93 #define ASC_PROBE_VALUE 0xA5
95 /*** ASC_BOH 3EF: always write 0 at the moment, read some values ? ***/
96 #define ASC_BOH ((scu->base)+4)