904 lines
25 KiB
C
904 lines
25 KiB
C
/* asc.c - device driver for hand scanners
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*
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* Current version supports:
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*
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* - AmiScan (Mustek) Color and BW hand scanners (GI1904 chipset)
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*
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* Copyright (c) 1995 Gunther Schadow. All rights reserved.
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* Copyright (c) 1995,1996,1997 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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/*
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* $Id: asc.c,v 1.35 1999/04/28 10:52:14 dt Exp $
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*/
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#include "asc.h"
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#if NASC > 0
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/proc.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/poll.h>
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#include <sys/select.h>
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#include "opt_devfs.h"
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include <sys/uio.h>
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#include <machine/asc_ioctl.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/ascreg.h>
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/***
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*** CONSTANTS & DEFINES
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***
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***/
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#define PROBE_FAIL 0
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#define PROBE_SUCCESS IO_ASCSIZE
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#define ATTACH_FAIL 0
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#define ATTACH_SUCCESS 1
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#define SUCCESS 0
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#define FAIL -1
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#define INVALID FAIL
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#define DMA1_READY 0x08
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#define ASCDEBUG
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#ifdef ASCDEBUG
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# define lprintf if(scu->flags & FLAG_DEBUG) printf
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#else
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# define lprintf (void)
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#endif
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#define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
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#define ASCPRI PRIBIO /* priority while reading a buffer */
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/***
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*** LAYOUT OF THE MINOR NUMBER
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***/
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#define UNIT_MASK 0xc0 /* unit asc0 .. asc3 */
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#define UNIT(x) (x >> 6)
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#define DBUG_MASK 0x20
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#define FRMT_MASK 0x18 /* output format */
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#define FRMT_RAW 0x00 /* output bits as read from scanner */
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#define FRMT_GRAY 0x1 /* output gray mode for color scanner */
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#define FRMT_PBM 0x08 /* output pbm format */
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#define FRMT_PGM 0x18
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/***
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*** THE GEMOMETRY TABLE
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***/
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#define GREY_LINE 826 /* 825, or 826 , or 550 ??? */
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static const struct asc_geom {
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int dpi; /* dots per inch */
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int dpl; /* dots per line */
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int bpl; /* bytes per line */
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int g_res; /* get resolution value (ASC_STAT) */
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} geomtab[] = {
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{ 800, 3312, 414, ASC_RES_800},
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{ 700, 2896, 362, ASC_RES_700},
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{ 600, 2480, 310, ASC_RES_600},
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{ 500, 1656, 258, ASC_RES_500},
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{ 400, 1656, 207, ASC_RES_400},
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{ 300, 1240, 155, ASC_RES_300},
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{ 200, 832, 104, ASC_RES_200},
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{ 100, 416, 52, ASC_RES_100},
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{ 200, 3*GREY_LINE, 3*GREY_LINE, 0 /* returned by color scanner */},
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{ 200, GREY_LINE, GREY_LINE, 0 /* color scanner, grey mode */},
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{ INVALID, 416, 52, INVALID } /* terminator */
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};
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/***
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*** THE TABLE OF UNITS
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***/
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struct _sbuf {
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size_t size;
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size_t rptr;
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size_t wptr; /* only changed in ascintr */
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size_t count;
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char *base;
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};
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struct asc_unit {
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long thedev; /* XXX */
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int base; /* base address */
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int dma_num; /* dma number */
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char dma_byte; /* mask of byte for setting DMA value */
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char int_byte; /* mask of byte for setting int value */
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char cfg_byte; /* mirror of byte written to config reg (ASC_CFG). */
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char cmd_byte; /* mirror of byte written to cmd port (ASC_CMD)*/
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char portf_byte;
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int flags;
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#define ATTACHED 0x01
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#define OPEN 0x02
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#define READING 0x04
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#define DMA_ACTIVE 0x08
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#define SLEEPING 0x10
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#define SEL_COLL 0x20
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#define PBM_MODE 0x40
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#define FLAG_DEBUG 0x80
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int geometry; /* resolution as geomtab index */
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int linesize; /* length of one scan line (from geom.table) */
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int blen; /* length of buffer in lines */
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int btime; /* timeout of buffer in seconds/hz */
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struct _sbuf sbuf;
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long icnt; /* interrupt count XXX for debugging */
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struct selinfo selp;
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int height; /* height, for pnm modes */
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size_t bcount; /* bytes to read, for pnm modes */
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#ifdef DEVFS
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void *devfs_asc; /* storage for devfs tokens (handles) */
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void *devfs_ascp;
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void *devfs_ascd;
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void *devfs_ascpd;
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#endif
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};
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static struct asc_unit unittab[NASC];
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/*** I could not find a reasonable buffer size limit other than by
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*** experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
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*** PAGE_SIZE are really too small. There must be something wrong
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*** with isa_dmastart/isa_dmarangecheck HELP!!!
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***
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*** Note, must be DEFAULT_BLEN * samples_per_line <= MAX_BUFSIZE
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***/
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#define MAX_BUFSIZE 0xb000 /* XXX was 0x3000 */
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#define DEFAULT_BLEN 16
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/***
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*** THE PER-DRIVER RECORD FOR ISA.C
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***/
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static int ascprobe (struct isa_device *isdp);
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static int ascattach(struct isa_device *isdp);
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struct isa_driver ascdriver = { ascprobe, ascattach, "asc" };
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static ointhand2_t ascintr;
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static d_open_t ascopen;
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static d_close_t ascclose;
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static d_read_t ascread;
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static d_ioctl_t ascioctl;
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static d_poll_t ascpoll;
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#define CDEV_MAJOR 71
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static struct cdevsw asc_cdevsw =
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{ ascopen, ascclose, ascread, nowrite, /*71*/
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ascioctl, nostop, nullreset, nodevtotty, /* asc */
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ascpoll, nommap, NULL, "asc", NULL, -1 };
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#define STATIC static
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/***
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*** LOCALLY USED SUBROUTINES
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***
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***/
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/***
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*** get_resolution
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*** read resolution from the scanner
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***/
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static void
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get_resolution(struct asc_unit *scu)
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{
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int res, i, delay;
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res=0;
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scu->cmd_byte = ASC_STANDBY;
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outb(ASC_CMD, scu->cmd_byte);
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tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres", hz/10);
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for(delay= 100; (res=inb(ASC_STAT)) & ASC_RDY_FLAG; delay--)
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{
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i = tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres0", 1);
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if ( ( i == 0 ) || ( i == EWOULDBLOCK ) )
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i = SUCCESS;
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else
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break;
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}
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if (delay==0) {
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lprintf("asc.get_resolution: timeout completing command\n");
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return /* -1 */;
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}
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/* ... actual read resolution... */
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res &= ASC_RES_MASK;
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for (i=0; geomtab[i].dpi != INVALID; i++) {
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if (geomtab[i].g_res == res) break;
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}
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if (geomtab[i].dpi==INVALID) {
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scu->geometry= i; /* INVALID; */
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lprintf("asc.get_resolution: wrong resolution\n");
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} else {
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lprintf("asc.get_resolution: %d dpi\n",geomtab[i].dpi);
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scu->geometry = i;
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}
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scu->portf_byte=0; /* default */
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if (geomtab[scu->geometry].g_res==0 && !(scu->thedev&FRMT_GRAY)) {
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/* color scanner seems to require this */
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scu->portf_byte=2;
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/* scu->geometry++; */
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}
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scu->linesize = geomtab[scu->geometry].bpl;
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scu->height = geomtab[scu->geometry].dpl; /* default... */
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}
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/***
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*** buffer_allocate
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*** allocate/reallocate a buffer
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*** Now just checks that the preallocated buffer is large enough.
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***/
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static int
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buffer_allocate(struct asc_unit *scu)
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{
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size_t size, size1;
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size = scu->blen * scu->linesize;
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lprintf("asc.buffer_allocate: need 0x%x bytes\n", size);
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if ( size > MAX_BUFSIZE ) {
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size1=size;
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size= ( (MAX_BUFSIZE+scu->linesize-1) / scu->linesize)*scu->linesize;
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lprintf("asc.buffer_allocate: 0x%x bytes are too much, try 0x%x\n",
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size1, size);
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return ENOMEM;
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}
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scu->sbuf.size = size;
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scu->sbuf.rptr = 0;
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scu->sbuf.wptr = 0;
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scu->sbuf.count = 0; /* available data for reading */
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lprintf("asc.buffer_allocate: ok\n");
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return SUCCESS;
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}
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/*** dma_restart
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*** invoked locally to start dma. Must run in a critical section
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***/
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static void
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dma_restart(struct asc_unit *scu)
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{
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unsigned char al=scu->cmd_byte;
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if (geomtab[scu->geometry].g_res==0) {/* color */
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isa_dmastart(B_READ, scu->sbuf.base+scu->sbuf.wptr,
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scu->linesize + 90 /* XXX */ , scu->dma_num);
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/*
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* looks like we have to set and then clear this
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* bit to enable the scanner to send interrupts
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*/
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outb( ASC_CMD, al |= 4 ); /* seems to disable interrupts */
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#if 0
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outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
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#endif
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outb( ASC_CMD, al &= 0xfb );
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scu->cmd_byte = al;
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} else { /* normal */
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isa_dmastart(B_READ, scu->sbuf.base+scu->sbuf.wptr,
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scu->linesize, scu->dma_num);
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/*** this is done in sub_20, after dmastart ? ***/
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#if 0
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outb( ASC_CMD, al |= 4 );
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outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
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outb( ASC_CMD, al &= 0xfb );
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scu->cmd_byte = al;
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#else
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outb( ASC_CMD, ASC_OPERATE);
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#endif
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}
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scu->flags |= DMA_ACTIVE;
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}
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/***
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*** the main functions
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***/
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/*** asc_reset
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*** resets the scanner and the config bytes...
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***/
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static void
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asc_reset(struct asc_unit *scu)
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{
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scu->cfg_byte = 0 ; /* clear... */
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scu->cmd_byte = 0 ; /* clear... */
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outb(ASC_CFG,scu->cfg_byte); /* for safety, do this here */
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outb(ASC_CMD,scu->cmd_byte); /* probably not needed */
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tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres", hz/10); /* sleep .1 sec */
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scu->blen = DEFAULT_BLEN;
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scu->btime = TIMEOUT;
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scu->height = 0 ; /* don't know better... */
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}
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/**************************************************************************
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***
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*** ascprobe
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*** read status port and check for proper configuration:
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*** - if address group matches (status byte has reasonable value)
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*** cannot check interrupt/dma, only clear the config byte.
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***/
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static int
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ascprobe (struct isa_device *isdp)
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{
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int unit = isdp->id_unit;
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struct asc_unit *scu = unittab + unit;
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int stb;
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scu->base = isdp->id_iobase; /*** needed by the following macros ***/
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scu->flags = FLAG_DEBUG;
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if ( isdp->id_iobase < 0 ) {
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lprintf("asc%d.probe: no iobase given\n", unit);
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return PROBE_FAIL;
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}
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if ((stb=inb(ASC_PROBE)) != ASC_PROBE_VALUE) {
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lprintf("asc%d.probe: failed, got 0x%02x instead of 0x%02x\n",
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unit, stb, ASC_PROBE_VALUE);
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return PROBE_FAIL;
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}
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/*
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* NOTE NOTE NOTE
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* the new AmiScan Color board uses int 10,11,12 instead of 3,5,10
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* respectively. This means that the driver must act accordingly.
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* Unfortunately there is no easy way of telling which board one has,
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* other than trying to get an interrupt and noticing that it is
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* missing. use "option ASC_NEW_BOARD" if you have a new board.
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*
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*/
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#if ASC_NEW_BOARD
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#define ASC_IRQ_A 10
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#define ASC_IRQ_B 11
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#define ASC_IRQ_C 12
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#else
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#define ASC_IRQ_A 3
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#define ASC_IRQ_B 5
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#define ASC_IRQ_C 10
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#endif
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switch(ffs(isdp->id_irq) - 1) {
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case ASC_IRQ_A :
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scu->int_byte = ASC_CNF_IRQ3;
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break;
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case ASC_IRQ_B :
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scu->int_byte = ASC_CNF_IRQ5;
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break;
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case ASC_IRQ_C :
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scu->int_byte = ASC_CNF_IRQ10;
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break;
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#if 0
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case -1:
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scu->int_byte = 0;
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lprintf("asc%d.probe: warning - going interruptless\n", unit);
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break;
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#endif
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default:
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lprintf("asc%d.probe: unsupported INT %d (only 3, 5, 10)\n",
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unit, ffs(isdp->id_irq) - 1 );
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return PROBE_FAIL;
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}
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scu->dma_num = isdp->id_drq;
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switch(scu->dma_num) {
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case 1:
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scu->dma_byte = ASC_CNF_DMA1;
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break;
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case 3:
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scu->dma_byte = ASC_CNF_DMA3;
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break;
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default:
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lprintf("asc%d.probe: unsupported DMA %d (only 1 or 3)\n",
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unit, scu->dma_num);
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return PROBE_FAIL;
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}
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asc_reset(scu);
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/* lprintf("asc%d.probe: ok\n", unit); */
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scu->flags &= ~FLAG_DEBUG;
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scu->icnt = 0;
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return PROBE_SUCCESS;
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}
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/**************************************************************************
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***
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*** ascattach
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*** finish initialization of unit structure, get geometry value (?)
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***/
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static int
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ascattach(struct isa_device *isdp)
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{
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int unit = isdp->id_unit;
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struct asc_unit *scu = unittab + unit;
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isdp->id_ointr = ascintr;
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scu->flags |= FLAG_DEBUG;
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printf("asc%d: [GI1904/Trust Ami-Scan Grey/Color]\n", unit);
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/*
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* Initialize buffer structure.
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* XXX this must be done early to give a good chance of getting a
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* contiguous buffer. This wastes memory.
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*/
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scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
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0ul, 0xfffffful, 1ul, 0x10000ul);
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if ( scu->sbuf.base == NULL )
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{
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lprintf("asc%d.attach: buffer allocation failed\n", unit);
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return ATTACH_FAIL; /* XXX attach must not fail */
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}
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scu->sbuf.size = INVALID;
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scu->sbuf.rptr = INVALID;
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scu->flags |= ATTACHED;
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/* lprintf("asc%d.attach: ok\n", unit); */
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scu->flags &= ~FLAG_DEBUG;
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scu->selp.si_flags=0;
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scu->selp.si_pid=(pid_t)0;
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#ifdef DEVFS
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#define ASC_UID 0
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#define ASC_GID 13
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scu->devfs_asc =
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devfs_add_devswf(&asc_cdevsw, unit<<6, DV_CHR, ASC_UID,
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ASC_GID, 0666, "asc%d", unit);
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scu->devfs_ascp =
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devfs_add_devswf(&asc_cdevsw, ((unit<<6) + FRMT_PBM), DV_CHR,
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ASC_UID, ASC_GID, 0666, "asc%dp", unit);
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scu->devfs_ascd =
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devfs_add_devswf(&asc_cdevsw, ((unit<<6) + DBUG_MASK), DV_CHR,
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ASC_UID, ASC_GID, 0666, "asc%dd", unit);
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scu->devfs_ascpd =
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devfs_add_devswf(&asc_cdevsw, ((unit<<6) + DBUG_MASK+FRMT_PBM),
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DV_CHR, ASC_UID, ASC_GID, 0666, "asc%dpd",
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unit);
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#endif /*DEVFS*/
|
|
return ATTACH_SUCCESS;
|
|
}
|
|
|
|
/**************************************************************************
|
|
***
|
|
*** ascintr
|
|
*** the interrupt routine, at the end of DMA...
|
|
***/
|
|
static void
|
|
ascintr(int unit)
|
|
{
|
|
struct asc_unit *scu = unittab + unit;
|
|
int chan_bit = 0x01 << scu->dma_num;
|
|
|
|
scu->icnt++;
|
|
/* ignore stray interrupts... */
|
|
if ((scu->flags & (OPEN |READING)) != (OPEN | READING) ) {
|
|
/* must be after closing... */
|
|
scu->flags &= ~(OPEN | READING | DMA_ACTIVE | SLEEPING | SEL_COLL);
|
|
return;
|
|
}
|
|
if ( (scu->flags & DMA_ACTIVE) && (inb(DMA1_READY) & chan_bit) != 0) {
|
|
outb( ASC_CMD, ASC_STANDBY);
|
|
scu->flags &= ~DMA_ACTIVE;
|
|
/* bounce buffers... */
|
|
isa_dmadone(B_READ, scu->sbuf.base+scu->sbuf.wptr,
|
|
scu->linesize, scu->dma_num);
|
|
scu->sbuf.wptr += scu->linesize;
|
|
if (scu->sbuf.wptr >= scu->sbuf.size) scu->sbuf.wptr=0;
|
|
scu->sbuf.count += scu->linesize;
|
|
if (scu->flags & SLEEPING) {
|
|
scu->flags &= ~SLEEPING;
|
|
wakeup((caddr_t)scu);
|
|
}
|
|
if (scu->sbuf.size - scu->sbuf.count >= scu->linesize) {
|
|
dma_restart(scu);
|
|
}
|
|
if (scu->selp.si_pid) {
|
|
selwakeup(&scu->selp);
|
|
scu->selp.si_pid=(pid_t)0;
|
|
scu->selp.si_flags = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**************************************************************************
|
|
***
|
|
*** ascopen
|
|
*** set open flag, set modes according to minor number
|
|
*** FOR RELEASE:
|
|
*** don't switch scanner on, wait until first read or ioctls go before
|
|
***/
|
|
|
|
STATIC int
|
|
ascopen(dev_t dev, int flags, int fmt, struct proc *p)
|
|
{
|
|
struct asc_unit *scu;
|
|
int unit;
|
|
|
|
unit = UNIT(minor(dev)) & UNIT_MASK;
|
|
if ( unit >= NASC )
|
|
{
|
|
#ifdef ASCDEBUG
|
|
/* XXX lprintf isn't valid here since there is no scu. */
|
|
printf("asc%d.open: unconfigured unit number (max %d)\n", unit, NASC);
|
|
#endif
|
|
return ENXIO;
|
|
}
|
|
scu = unittab + unit;
|
|
if ( !( scu->flags & ATTACHED ) )
|
|
{
|
|
lprintf("asc%d.open: unit was not attached successfully 0x%04x\n",
|
|
unit, scu->flags);
|
|
return ENXIO;
|
|
}
|
|
|
|
if ( minor(dev) & DBUG_MASK )
|
|
scu->flags |= FLAG_DEBUG;
|
|
else
|
|
scu->flags &= ~FLAG_DEBUG;
|
|
|
|
switch(minor(dev) & FRMT_MASK) {
|
|
case FRMT_PBM:
|
|
scu->flags |= PBM_MODE;
|
|
lprintf("asc%d.open: pbm mode\n", unit);
|
|
break;
|
|
case FRMT_RAW:
|
|
lprintf("asc%d.open: raw mode\n", unit);
|
|
scu->flags &= ~PBM_MODE;
|
|
break;
|
|
default:
|
|
lprintf("asc%d.open: gray maps are not yet supported", unit);
|
|
return ENXIO;
|
|
}
|
|
|
|
lprintf("asc%d.open: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
|
|
|
|
if ( scu->flags & OPEN ) {
|
|
lprintf("asc%d.open: already open", unit);
|
|
return EBUSY;
|
|
}
|
|
if (isa_dma_acquire(scu->dma_num))
|
|
return(EBUSY);
|
|
|
|
scu->flags = ATTACHED | OPEN;
|
|
|
|
asc_reset(scu);
|
|
get_resolution(scu);
|
|
return SUCCESS;
|
|
}
|
|
|
|
static int
|
|
asc_startread(struct asc_unit *scu)
|
|
{
|
|
/*** from here on, things can be delayed to the first read/ioctl ***/
|
|
/*** this was done in sub_12... ***/
|
|
scu->cfg_byte= scu->cmd_byte=0; /* init scanner */
|
|
outb(ASC_CMD, scu->cmd_byte);
|
|
/*** this was done in sub_16, set scan len... ***/
|
|
outb(ASC_BOH, scu->portf_byte );
|
|
if (geomtab[scu->geometry].g_res==0) { /* color */
|
|
scu->cmd_byte = 0x00 ;
|
|
} else {
|
|
scu->cmd_byte = 0x90 ;
|
|
}
|
|
outb(ASC_CMD, scu->cmd_byte);
|
|
outb(ASC_LEN_L, scu->linesize & 0xff /* len_low */);
|
|
outb(ASC_LEN_H, (scu->linesize >>8) & 0xff /* len_high */);
|
|
/*** this was done in sub_21, config DMA ... ***/
|
|
scu->cfg_byte |= scu->dma_byte;
|
|
outb(ASC_CFG, scu->cfg_byte);
|
|
/*** sub_22: enable int on the scanner ***/
|
|
scu->cfg_byte |= scu->int_byte;
|
|
outb(ASC_CFG, scu->cfg_byte);
|
|
/*** sub_28: light on etc...***/
|
|
scu->cmd_byte = ASC_STANDBY;
|
|
outb(ASC_CMD, scu->cmd_byte);
|
|
tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascstrd", hz/10); /* sleep .1 sec */
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**************************************************************************
|
|
***
|
|
*** ascclose
|
|
*** turn off scanner, release the buffer
|
|
*** should probably terminate dma ops, release int and dma. lr 12mar95
|
|
***/
|
|
|
|
STATIC int
|
|
ascclose(dev_t dev, int flags, int fmt, struct proc *p)
|
|
{
|
|
int unit = UNIT(minor(dev));
|
|
struct asc_unit *scu = unittab + unit;
|
|
|
|
lprintf("asc%d.close: minor %d\n",
|
|
unit, minor(dev));
|
|
|
|
if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
|
|
lprintf("asc%d.close: unit was not attached successfully 0x%04x\n",
|
|
unit, scu->flags);
|
|
return ENXIO;
|
|
}
|
|
/* all this is in sub_29... */
|
|
/* cli(); */
|
|
outb(ASC_CFG, 0 ); /* don't save in CFG byte!!! */
|
|
scu->cmd_byte &= ~ASC_LIGHT_ON;
|
|
outb(ASC_CMD, scu->cmd_byte);/* light off */
|
|
tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascclo", hz/2); /* sleep 1/2 sec */
|
|
scu->cfg_byte &= ~ scu->dma_byte ; /* disable scanner dma */
|
|
scu->cfg_byte &= ~ scu->int_byte ; /* disable scanner int */
|
|
outb(ASC_CFG, scu->cfg_byte);
|
|
/* --- disable dma controller ? --- */
|
|
isa_dma_release(scu->dma_num);
|
|
/* --- disable interrupts on the controller (sub_24) --- */
|
|
|
|
scu->sbuf.size = INVALID;
|
|
scu->sbuf.rptr = INVALID;
|
|
|
|
scu->flags &= ~(FLAG_DEBUG | OPEN | READING);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
static void
|
|
pbm_init(struct asc_unit *scu)
|
|
{
|
|
int width = geomtab[scu->geometry].dpl;
|
|
int l= sprintf(scu->sbuf.base,"P4 %d %d\n", width, scu->height);
|
|
char *p;
|
|
|
|
scu->bcount = scu->height * width / 8 + l;
|
|
|
|
/* move header to end of sbuf */
|
|
scu->sbuf.rptr=scu->sbuf.size-l;
|
|
bcopy(scu->sbuf.base, scu->sbuf.base+scu->sbuf.rptr,l);
|
|
scu->sbuf.count = l;
|
|
if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
|
|
for(p = scu->sbuf.base + scu->sbuf.rptr; l; p++, l--)
|
|
*p = ~*p;
|
|
}
|
|
}
|
|
/**************************************************************************
|
|
***
|
|
*** ascread
|
|
***/
|
|
|
|
STATIC int
|
|
ascread(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
int unit = UNIT(minor(dev));
|
|
struct asc_unit *scu = unittab + unit;
|
|
size_t nbytes;
|
|
int sps, res;
|
|
unsigned char *p;
|
|
|
|
lprintf("asc%d.read: minor %d icnt %ld\n", unit, minor(dev), scu->icnt);
|
|
|
|
if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
|
|
lprintf("asc%d.read: unit was not attached successfully 0x%04x\n",
|
|
unit, scu->flags);
|
|
return ENXIO;
|
|
}
|
|
|
|
if ( !(scu->flags & READING) ) { /*** first read... ***/
|
|
/* allocate a buffer for reading data and init things */
|
|
if ( (res = buffer_allocate(scu)) == SUCCESS ) scu->flags |= READING;
|
|
else return res;
|
|
asc_startread(scu);
|
|
if ( scu->flags & PBM_MODE ) { /* initialize for pbm mode */
|
|
pbm_init(scu);
|
|
}
|
|
}
|
|
|
|
lprintf("asc%d.read(before): "
|
|
"sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
|
|
unit, scu->sbuf.size, scu->sbuf.rptr,
|
|
scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,
|
|
scu->icnt);
|
|
|
|
sps=spltty();
|
|
if ( scu->sbuf.count == 0 ) { /* no data avail., must wait */
|
|
if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
|
|
scu->flags |= SLEEPING;
|
|
res = tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascread", 0);
|
|
scu->flags &= ~SLEEPING;
|
|
if ( res == 0 ) res = SUCCESS;
|
|
}
|
|
splx(sps); /* lower priority... */
|
|
if (scu->flags & FLAG_DEBUG)
|
|
tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascdly",hz);
|
|
lprintf("asc%d.read(after): "
|
|
"sz 0x%x, rptr 0x%x, wptr 0x%x, cnt 0x%x bcnt 0x%x flags 0x%x icnt %ld\n",
|
|
unit, scu->sbuf.size, scu->sbuf.rptr,
|
|
scu->sbuf.wptr, scu->sbuf.count, scu->bcount,scu->flags,scu->icnt);
|
|
|
|
/* first, not more than available... */
|
|
nbytes = min( uio->uio_resid, scu->sbuf.count );
|
|
/* second, contiguous data... */
|
|
nbytes = min( nbytes, (scu->sbuf.size - scu->sbuf.rptr) );
|
|
/* third, one line (will remove this later, XXX) */
|
|
nbytes = min( nbytes, scu->linesize );
|
|
if ( (scu->flags & PBM_MODE) )
|
|
nbytes = min( nbytes, scu->bcount );
|
|
lprintf("asc%d.read: transferring 0x%x bytes\n", unit, nbytes);
|
|
if (geomtab[scu->geometry].g_res!=0) { /* BW scanner */
|
|
lprintf("asc%d.read: invert buffer\n",unit);
|
|
for(p = scu->sbuf.base + scu->sbuf.rptr, res=nbytes; res; p++, res--)
|
|
*p = ~*p;
|
|
}
|
|
res = uiomove(scu->sbuf.base + scu->sbuf.rptr, nbytes, uio);
|
|
if ( res != SUCCESS ) {
|
|
lprintf("asc%d.read: uiomove failed %d", unit, res);
|
|
return res;
|
|
}
|
|
|
|
sps=spltty();
|
|
scu->sbuf.rptr += nbytes;
|
|
if (scu->sbuf.rptr >= scu->sbuf.size) scu->sbuf.rptr=0;
|
|
scu->sbuf.count -= nbytes;
|
|
/* having moved some data, can read mode */
|
|
if (!(scu->flags & DMA_ACTIVE)) dma_restart(scu);
|
|
splx(sps); /* lower priority... */
|
|
if ( scu->flags & PBM_MODE ) scu->bcount -= nbytes;
|
|
|
|
lprintf("asc%d.read: size 0x%x, pointer 0x%x, bcount 0x%x, ok\n",
|
|
unit, scu->sbuf.size, scu->sbuf.rptr, scu->bcount);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**************************************************************************
|
|
***
|
|
*** ascioctl
|
|
***/
|
|
|
|
STATIC int
|
|
ascioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p)
|
|
{
|
|
int unit = UNIT(minor(dev));
|
|
struct asc_unit *scu = unittab + unit;
|
|
|
|
lprintf("asc%d.ioctl: minor %d\n",
|
|
unit, minor(dev));
|
|
|
|
if ( unit >= NASC || !( scu->flags & ATTACHED ) ) {
|
|
lprintf("asc%d.ioctl: unit was not attached successfully 0x%04x\n",
|
|
unit, scu->flags);
|
|
return ENXIO;
|
|
}
|
|
switch(cmd) {
|
|
case ASC_GRES:
|
|
asc_reset(scu);
|
|
get_resolution(scu);
|
|
*(int *)data=geomtab[scu->geometry].dpi;
|
|
lprintf("asc%d.ioctl:ASC_GRES %ddpi\n", unit, *(int *)data);
|
|
return SUCCESS;
|
|
case ASC_GWIDTH:
|
|
*(int *)data=geomtab[scu->geometry].dpl;
|
|
lprintf("asc%d.ioctl:ASC_GWIDTH %d\n", unit, *(int *)data);
|
|
return SUCCESS;
|
|
case ASC_GHEIGHT:
|
|
*(int *)data=scu->height;
|
|
lprintf("asc%d.ioctl:ASC_GHEIGHT %d\n", unit, *(int *)data);
|
|
return SUCCESS;
|
|
case ASC_SHEIGHT:
|
|
lprintf("asc%d.ioctl:ASC_SHEIGHT %d\n", unit, *(int *)data);
|
|
if ( scu->flags & READING ) {
|
|
lprintf("asc%d:ioctl on already reading unit\n", unit);
|
|
return EBUSY;
|
|
}
|
|
scu->height=*(int *)data;
|
|
return SUCCESS;
|
|
#if 0
|
|
case ASC_GBLEN:
|
|
*(int *)data=scu->blen;
|
|
lprintf("asc%d.ioctl:ASC_GBLEN %d\n", unit, *(int *)data);
|
|
return SUCCESS;
|
|
case ASC_SBLEN:
|
|
lprintf("asc%d.ioctl:ASC_SBLEN %d\n", unit, *(int *)data);
|
|
if (*(int *)data * geomtab[scu->geometry].dpl / 8 > MAX_BUFSIZE)
|
|
{
|
|
lprintf("asc%d:ioctl buffer size too high\n", unit);
|
|
return ENOMEM;
|
|
}
|
|
scu->blen=*(int *)data;
|
|
return SUCCESS;
|
|
case ASC_GBTIME:
|
|
*(int *)data = scu->btime / hz;
|
|
lprintf("asc%d.ioctl:ASC_GBTIME %d\n", unit, *(int *)data);
|
|
return SUCCESS;
|
|
case ASC_SBTIME:
|
|
scu->btime = *(int *)data * hz;
|
|
lprintf("asc%d.ioctl:ASC_SBTIME %d\n", unit, *(int *)data);
|
|
return SUCCESS;
|
|
#endif
|
|
default: return ENOTTY;
|
|
}
|
|
return SUCCESS;
|
|
}
|
|
|
|
STATIC int
|
|
ascpoll(dev_t dev, int events, struct proc *p)
|
|
{
|
|
int unit = UNIT(minor(dev));
|
|
struct asc_unit *scu = unittab + unit;
|
|
int sps;
|
|
struct proc *p1;
|
|
int revents = 0;
|
|
|
|
sps=spltty();
|
|
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
|
if (scu->sbuf.count >0)
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
else {
|
|
if (!(scu->flags & DMA_ACTIVE))
|
|
dma_restart(scu);
|
|
|
|
if (scu->selp.si_pid && (p1=pfind(scu->selp.si_pid))
|
|
&& p1->p_wchan == (caddr_t)&selwait)
|
|
scu->selp.si_flags = SI_COLL;
|
|
else
|
|
scu->selp.si_pid = p->p_pid;
|
|
}
|
|
}
|
|
splx(sps);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int asc_devsw_installed;
|
|
|
|
static void
|
|
asc_drvinit(void *unused)
|
|
{
|
|
dev_t dev;
|
|
|
|
if( ! asc_devsw_installed ) {
|
|
dev = makedev(CDEV_MAJOR,0);
|
|
cdevsw_add(&dev,&asc_cdevsw,NULL);
|
|
asc_devsw_installed = 1;
|
|
}
|
|
}
|
|
|
|
SYSINIT(ascdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,asc_drvinit,NULL)
|
|
|
|
|
|
#endif /* NASC > 0 */
|