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freebsd/sys/i386/isa/asc.c

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/* asc.c - device driver for hand scanners
*
* Current version supports:
*
* - AmiScan (Mustek) Color and BW hand scanners (GI1904 chipset)
*
* Copyright (c) 1995 Gunther Schadow. All rights reserved.
* Copyright (c) 1995,1996,1997 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.
*/
/*
* $FreeBSD$
*/
#include "asc.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/poll.h>
#include <sys/selinfo.h>
#include <sys/uio.h>
#include <sys/bus.h>
#include <machine/asc_ioctl.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/ascreg.h>
#ifndef COMPAT_OLDISA
#error "The asc device requires the old isa compatibility shims"
#endif
/***
*** CONSTANTS & DEFINES
***
***/
#define PROBE_FAIL 0
#define PROBE_SUCCESS IO_ASCSIZE
#define ATTACH_FAIL 0
#define ATTACH_SUCCESS 1
#define SUCCESS 0
#define FAIL -1
#define INVALID FAIL
#define DMA1_READY 0x08
#define ASCDEBUG
#ifdef ASCDEBUG
# define lprintf if(scu->flags & FLAG_DEBUG) printf
#else
# define lprintf (void)
#endif
#define TIMEOUT (hz*15) /* timeout while reading a buffer - default value */
#define ASCPRI PRIBIO /* priority while reading a buffer */
/***
*** LAYOUT OF THE MINOR NUMBER
***/
#define UNIT_MASK 0xc0 /* unit asc0 .. asc3 */
#define UNIT(x) (x >> 6)
#define DBUG_MASK 0x20
#define FRMT_MASK 0x18 /* output format */
#define FRMT_RAW 0x00 /* output bits as read from scanner */
#define FRMT_GRAY 0x1 /* output gray mode for color scanner */
#define FRMT_PBM 0x08 /* output pbm format */
#define FRMT_PGM 0x18
/***
*** THE GEMOMETRY TABLE
***/
#define GREY_LINE 826 /* 825, or 826 , or 550 ??? */
static const struct asc_geom {
int dpi; /* dots per inch */
int dpl; /* dots per line */
int bpl; /* bytes per line */
int g_res; /* get resolution value (ASC_STAT) */
} geomtab[] = {
{ 800, 3312, 414, ASC_RES_800},
{ 700, 2896, 362, ASC_RES_700},
{ 600, 2480, 310, ASC_RES_600},
{ 500, 1656, 258, ASC_RES_500},
{ 400, 1656, 207, ASC_RES_400},
{ 300, 1240, 155, ASC_RES_300},
{ 200, 832, 104, ASC_RES_200},
{ 100, 416, 52, ASC_RES_100},
{ 200, 3*GREY_LINE, 3*GREY_LINE, 0 /* returned by color scanner */},
{ 200, GREY_LINE, GREY_LINE, 0 /* color scanner, grey mode */},
{ INVALID, 416, 52, INVALID } /* terminator */
};
/***
*** THE TABLE OF UNITS
***/
struct _sbuf {
size_t size;
size_t rptr;
size_t wptr; /* only changed in ascintr */
size_t count;
char *base;
};
struct asc_unit {
long thedev; /* XXX */
int base; /* base address */
int dma_num; /* dma number */
char dma_byte; /* mask of byte for setting DMA value */
char int_byte; /* mask of byte for setting int value */
char cfg_byte; /* mirror of byte written to config reg (ASC_CFG). */
char cmd_byte; /* mirror of byte written to cmd port (ASC_CMD)*/
char portf_byte;
int flags;
#define ATTACHED 0x01
#define OPEN 0x02
#define READING 0x04
#define DMA_ACTIVE 0x08
#define SLEEPING 0x10
#define SEL_COLL 0x20
#define PBM_MODE 0x40
#define FLAG_DEBUG 0x80
int geometry; /* resolution as geomtab index */
int linesize; /* length of one scan line (from geom.table) */
int blen; /* length of buffer in lines */
int btime; /* timeout of buffer in seconds/hz */
struct _sbuf sbuf;
long icnt; /* interrupt count XXX for debugging */
struct selinfo selp;
int height; /* height, for pnm modes */
size_t bcount; /* bytes to read, for pnm modes */
};
static struct asc_unit unittab[NASC];
/*** I could not find a reasonable buffer size limit other than by
*** experiments. MAXPHYS is obviously too much, while DEV_BSIZE and
*** PAGE_SIZE are really too small. There must be something wrong
*** with isa_dmastart/isa_dmarangecheck HELP!!!
***
*** Note, must be DEFAULT_BLEN * samples_per_line <= MAX_BUFSIZE
***/
#define MAX_BUFSIZE 0xb000 /* XXX was 0x3000 */
#define DEFAULT_BLEN 16
/***
*** THE PER-DRIVER RECORD FOR ISA.C
***/
static int ascprobe (struct isa_device *isdp);
static int ascattach(struct isa_device *isdp);
struct isa_driver ascdriver = {
INTR_TYPE_TTY,
ascprobe,
ascattach,
"asc"
};
COMPAT_ISA_DRIVER(asc, ascdriver);
static ointhand2_t ascintr;
static d_open_t ascopen;
static d_close_t ascclose;
static d_read_t ascread;
static d_ioctl_t ascioctl;
static d_poll_t ascpoll;
#define CDEV_MAJOR 71
static struct cdevsw asc_cdevsw = {
/* open */ ascopen,
/* close */ ascclose,
/* read */ ascread,
/* write */ nowrite,
/* ioctl */ ascioctl,
/* poll */ ascpoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "asc",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* bmaj */ -1
};
#define STATIC static
/***
*** LOCALLY USED SUBROUTINES
***
***/
/***
*** get_resolution
*** read resolution from the scanner
***/
static void
get_resolution(struct asc_unit *scu)
{
int res, i, delay;
res=0;
scu->cmd_byte = ASC_STANDBY;
outb(ASC_CMD, scu->cmd_byte);
tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres", hz/10);
for(delay= 100; (res=inb(ASC_STAT)) & ASC_RDY_FLAG; delay--)
{
i = tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres0", 1);
if ( ( i == 0 ) || ( i == EWOULDBLOCK ) )
i = SUCCESS;
else
break;
}
if (delay==0) {
lprintf("asc.get_resolution: timeout completing command\n");
return /* -1 */;
}
/* ... actual read resolution... */
res &= ASC_RES_MASK;
for (i=0; geomtab[i].dpi != INVALID; i++) {
if (geomtab[i].g_res == res) break;
}
if (geomtab[i].dpi==INVALID) {
scu->geometry= i; /* INVALID; */
lprintf("asc.get_resolution: wrong resolution\n");
} else {
lprintf("asc.get_resolution: %d dpi\n",geomtab[i].dpi);
scu->geometry = i;
}
scu->portf_byte=0; /* default */
if (geomtab[scu->geometry].g_res==0 && !(scu->thedev&FRMT_GRAY)) {
/* color scanner seems to require this */
scu->portf_byte=2;
/* scu->geometry++; */
}
scu->linesize = geomtab[scu->geometry].bpl;
scu->height = geomtab[scu->geometry].dpl; /* default... */
}
/***
*** buffer_allocate
*** allocate/reallocate a buffer
*** Now just checks that the preallocated buffer is large enough.
***/
static int
buffer_allocate(struct asc_unit *scu)
{
size_t size, size1;
size = scu->blen * scu->linesize;
lprintf("asc.buffer_allocate: need 0x%x bytes\n", size);
if ( size > MAX_BUFSIZE ) {
size1=size;
size= ( (MAX_BUFSIZE+scu->linesize-1) / scu->linesize)*scu->linesize;
lprintf("asc.buffer_allocate: 0x%x bytes are too much, try 0x%x\n",
size1, size);
return ENOMEM;
}
scu->sbuf.size = size;
scu->sbuf.rptr = 0;
scu->sbuf.wptr = 0;
scu->sbuf.count = 0; /* available data for reading */
lprintf("asc.buffer_allocate: ok\n");
return SUCCESS;
}
/*** dma_restart
*** invoked locally to start dma. Must run in a critical section
***/
static void
dma_restart(struct asc_unit *scu)
{
unsigned char al=scu->cmd_byte;
if (geomtab[scu->geometry].g_res==0) {/* color */
isa_dmastart(ISADMA_READ, scu->sbuf.base+scu->sbuf.wptr,
scu->linesize + 90 /* XXX */ , scu->dma_num);
/*
* looks like we have to set and then clear this
* bit to enable the scanner to send interrupts
*/
outb( ASC_CMD, al |= 4 ); /* seems to disable interrupts */
#if 0
outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
#endif
outb( ASC_CMD, al &= 0xfb );
scu->cmd_byte = al;
} else { /* normal */
isa_dmastart(ISADMA_READ, scu->sbuf.base+scu->sbuf.wptr,
scu->linesize, scu->dma_num);
/*** this is done in sub_20, after dmastart ? ***/
#if 0
outb( ASC_CMD, al |= 4 );
outb( ASC_CMD, al |= 8 ); /* ??? seems useless */
outb( ASC_CMD, al &= 0xfb );
scu->cmd_byte = al;
#else
outb( ASC_CMD, ASC_OPERATE);
#endif
}
scu->flags |= DMA_ACTIVE;
}
/***
*** the main functions
***/
/*** asc_reset
*** resets the scanner and the config bytes...
***/
static void
asc_reset(struct asc_unit *scu)
{
scu->cfg_byte = 0 ; /* clear... */
scu->cmd_byte = 0 ; /* clear... */
outb(ASC_CFG,scu->cfg_byte); /* for safety, do this here */
outb(ASC_CMD,scu->cmd_byte); /* probably not needed */
tsleep((caddr_t)scu, ASCPRI | PCATCH, "ascres", hz/10); /* sleep .1 sec */
scu->blen = DEFAULT_BLEN;
scu->btime = TIMEOUT;
scu->height = 0 ; /* don't know better... */
}
/**************************************************************************
***
*** ascprobe
*** read status port and check for proper configuration:
*** - if address group matches (status byte has reasonable value)
*** cannot check interrupt/dma, only clear the config byte.
***/
static int
ascprobe (struct isa_device *isdp)
{
int unit = isdp->id_unit;
struct asc_unit *scu = unittab + unit;
int stb;
static int once;
if (!once++)
cdevsw_add(&asc_cdevsw);
scu->base = isdp->id_iobase; /*** needed by the following macros ***/
scu->flags = FLAG_DEBUG;
if ( isdp->id_iobase < 0 ) {
lprintf("asc%d.probe: no iobase given\n", unit);
return PROBE_FAIL;
}
if ((stb=inb(ASC_PROBE)) != ASC_PROBE_VALUE) {
lprintf("asc%d.probe: failed, got 0x%02x instead of 0x%02x\n",
unit, stb, ASC_PROBE_VALUE);
return PROBE_FAIL;
}
/*
* NOTE NOTE NOTE
* the new AmiScan Color board uses int 10,11,12 instead of 3,5,10
* respectively. This means that the driver must act accordingly.
* Unfortunately there is no easy way of telling which board one has,
* other than trying to get an interrupt and noticing that it is
* missing. use "option ASC_NEW_BOARD" if you have a new board.
*
*/
#if ASC_NEW_BOARD
#define ASC_IRQ_A 10
#define ASC_IRQ_B 11
#define ASC_IRQ_C 12
#else
#define ASC_IRQ_A 3
#define ASC_IRQ_B 5
#define ASC_IRQ_C 10
#endif
switch(ffs(isdp->id_irq) - 1) {
case ASC_IRQ_A :
scu->int_byte = ASC_CNF_IRQ3;
break;
case ASC_IRQ_B :
scu->int_byte = ASC_CNF_IRQ5;
break;
case ASC_IRQ_C :
scu->int_byte = ASC_CNF_IRQ10;
break;
#if 0
case -1:
scu->int_byte = 0;
lprintf("asc%d.probe: warning - going interruptless\n", unit);
break;
#endif
default:
lprintf("asc%d.probe: unsupported INT %d (only 3, 5, 10)\n",
unit, ffs(isdp->id_irq) - 1 );
return PROBE_FAIL;
}
scu->dma_num = isdp->id_drq;
switch(scu->dma_num) {
case 1:
scu->dma_byte = ASC_CNF_DMA1;
break;
case 3:
scu->dma_byte = ASC_CNF_DMA3;
break;
default:
lprintf("asc%d.probe: unsupported DMA %d (only 1 or 3)\n",
unit, scu->dma_num);
return PROBE_FAIL;
}
asc_reset(scu);
/* lprintf("asc%d.probe: ok\n", unit); */
scu->flags &= ~FLAG_DEBUG;
scu->icnt = 0;
return PROBE_SUCCESS;
}
/**************************************************************************
***
*** ascattach
*** finish initialization of unit structure, get geometry value (?)
***/
static int
ascattach(struct isa_device *isdp)
{
int unit = isdp->id_unit;
struct asc_unit *scu = unittab + unit;
isdp->id_ointr = ascintr;
scu->flags |= FLAG_DEBUG;
printf("asc%d: [GI1904/Trust Ami-Scan Grey/Color]\n", unit);
/*
* Initialize buffer structure.
* XXX this must be done early to give a good chance of getting a
* contiguous buffer. This wastes memory.
*/
scu->sbuf.base = contigmalloc((unsigned long)MAX_BUFSIZE, M_DEVBUF, M_NOWAIT,
0ul, 0xfffffful, 1ul, 0x10000ul);
if ( scu->sbuf.base == NULL )
{
lprintf("asc%d.attach: buffer allocation failed\n", unit);
return ATTACH_FAIL; /* XXX attach must not fail */
}
scu->sbuf.size = INVALID;
scu->sbuf.rptr = INVALID;
scu->flags |= ATTACHED;
/* lprintf("asc%d.attach: ok\n", unit); */
scu->flags &= ~FLAG_DEBUG;
scu->selp.si_flags=0;
scu->selp.si_pid=(pid_t)0;
#define ASC_UID 0
#define ASC_GID 13
make_dev(&asc_cdevsw, unit<<6, ASC_UID, ASC_GID, 0666, "asc%d", unit);
make_dev(&asc_cdevsw, ((unit<<6) + FRMT_PBM),
ASC_UID, ASC_GID, 0666, "asc%dp", unit);
make_dev(&asc_cdevsw, ((unit<<6) + DBUG_MASK),
ASC_UID, ASC_GID, 0666, "asc%dd", unit);
make_dev(&asc_cdevsw, ((unit<<6) + DBUG_MASK+FRMT_PBM),
ASC_UID, ASC_GID, 0666, "asc%dpd", unit);
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(ISADMA_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;
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);
selrecord(p, &scu->selp);
}
}
splx(sps);
return 0;
}
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