/* 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 #include #include #include #include #include #include #include #include #include #include #include #include #include /*** *** 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 = { ascprobe, ascattach, "asc" }; 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(B_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(B_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(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; }