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