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93 lines
3.9 KiB
C
93 lines
3.9 KiB
C
/* ascreg.h - port and bit definitions for the GI-1904 interface
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*
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* Copyright (c) 1995 Gunther Schadow. All rights reserved.
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* Copyright (c) 1995 Luigi Rizzo. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Gunther Schadow.
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* and Luigi Rizzo
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*** Registers (base=3EB): ************/
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#define ASC_CFG (scu->base)
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/*** ASC_CFG 3EB: configuration register. Write only, mirror in RAM
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*** 7 6 5 4 3 2 1 0
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*** - - I_5 I_3 I10 D_3 - D_1
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***/
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/*** #define ASC_CNF_MASK 0x3D */ /* was 0x5a */
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#define ASC_CNF_DMA1 0x01 /* was (~0x02 & ASC_CNF_MASK) */
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#define ASC_CNF_DMA3 0x04 /* was (~0x08 & ASC_CNF_MASK) */
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#define ASC_CNF_IRQ3 0x10 /* was (~0x10 & ASC_CNF_MASK) */
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#define ASC_CNF_IRQ5 0x20 /* was (~0x40 & ASC_CNF_MASK) */
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#define ASC_CNF_IRQ10 0x08 /* was (~0x40 & ASC_CNF_MASK) */
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/*** ASC_STAT 3EC: command/status; rw, mirror in ram
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*** 7 6 5 4 3 2 1 0
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*** BSY - - - - - - -
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*** [<-- Resolution -->] 13h,10h,0eh,0ch,09h, 07h, 04h, 02h
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***/
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#define ASC_STAT (scu->base + 1)
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#define ASC_RDY_FLAG 0x80
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#define ASC_RES_MASK 0x3f
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#define ASC_RES_800 0x13
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#define ASC_RES_700 0x10
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#define ASC_RES_600 0x0e
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#define ASC_RES_500 0x0c
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#define ASC_RES_400 0x09 /* 0x00 */
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#define ASC_RES_300 0x07 /* 0x04 */
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#define ASC_RES_200 0x04 /* 0x20 */
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#define ASC_RES_100 0x02 /* 0x24 */
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/*** ASC_CMD 3EC: command/status; rw, mirror in ram
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*** W: 7 6 5 4 3 2 1 0
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*** . - - . . . . .
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*** b0: 1: light on & get resolution, 0: light off
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*** b1: 0: load scan len (sub_16, with b4=1, b7=1)
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*** b2: 1/0 : dma stuff
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*** b3: 0/1 : dma stuff
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*** b4: 1 : load scan len (sub_16, with b1=0, b7=1)
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*** b5: ?
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*** b6: ?
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*** b7: ? : set at beginning of sub_16
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***/
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#define ASC_CMD (scu->base + 1)
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#define ASC_LIGHT_ON 0x01
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#define ASC_SET_B2 0x04
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#define ASC_OPERATE 0x91 /* from linux driver... */
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#define ASC_STANDBY 0x05 /* from linux driver... */
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/*** ASC_LEN_L, ASC_LEN_H 3ED, 3EE: transfer length, lsb first ***/
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#define ASC_LEN_L ((scu->base)+2)
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#define ASC_LEN_H ((scu->base)+3)
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/*** 3EE ASC_PROBE (must read ASC_PROBE_VALUE) ***/
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#define ASC_PROBE ((scu->base)+3)
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#define ASC_PROBE_VALUE 0xA5
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/*** ASC_BOH 3EF: always write 0 at the moment, read some values ? ***/
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#define ASC_BOH ((scu->base)+4)
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