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Device layer rollup commit.

* cdevsw_add() is now required.  cdevsw_add() and cdevsw_remove() may specify
  a mask/match indicating the range of supported minor numbers.  Multiple
  cdevsw_add()'s using the same major number, but distinctly different
  ranges, may be issued.  All devices that failed to call cdevsw_add() before
  now do.

* cdevsw_remove() now automatically marks all devices within its supported
  range as being destroyed.

* vnode->v_rdev is no longer resolved when the vnode is created.  Instead,
  only v_udev (a newly added field) is resolved.  v_rdev is resolved when
  the vnode is opened and cleared on the last close.

* A great deal of code was making rather dubious assumptions with regards
  to the validity of devices associated with vnodes, primarily due to
  the persistence of a device structure due to being indexed by (major, minor)
  instead of by (cdevsw, major, minor).  In particular, if you run a program
  which connects to a USB device and then you pull the USB device and plug
  it back in, the vnode subsystem will continue to believe that the device
  is open when, in fact, it isn't (because it was destroyed and recreated).

  In particular, note that all the VFS mount procedures now check devices
  via v_udev instead of v_rdev prior to calling VOP_OPEN(), since v_rdev
  is NULL prior to the first open.

* The disk layer's device interaction has been rewritten.  The disk layer
  (i.e. the slice and disklabel management layer) no longer overloads
  its data onto the device structure representing the underlying physical
  disk.  Instead, the disk layer uses the new cdevsw_add() functionality
  to register its own cdevsw using the underlying device's major number,
  and simply does NOT register the underlying device's cdevsw.  No
  confusion is created because the device hash is now based on
  (cdevsw,major,minor) rather then (major,minor).

  NOTE: This also means that underlying raw disk devices may use the entire
  device minor number instead of having to reserve the bits used by the disk
  layer, and also means that can we (theoretically) stack a fully
  disklabel-supported 'disk' on top of any block device.

* The new reference counting scheme prevents this by associating a device
  with a cdevsw and disconnecting the device from its cdevsw when the cdevsw
  is removed.  Additionally, all udev2dev() lookups run through the cdevsw
  mask/match and only successfully find devices still associated with an
  active cdevsw.

* Major work on MFS:  MFS no longer shortcuts vnode and device creation.  It
  now creates a real vnode and a real device and implements real open and
  close VOPs.  Additionally, due to the disk layer changes, MFS is no longer
  limited to 255 mounts.  The new limit is 16 million.  Since MFS creates a
  real device node, mount_mfs will now create a real /dev/mfs<PID> device
  that can be read from userland (e.g. so you can dump an MFS filesystem).

* BUF AND DEVICE STRATEGY changes.  The struct buf contains a b_dev field.
  In order to properly handle stacked devices we now require that the b_dev
  field be initialized before the device strategy routine is called.  This
  required some additional work in various VFS implementations.  To enforce
  this requirement, biodone() now sets b_dev to NODEV.  The new disk layer
  will adjust b_dev before forwarding a request to the actual physical
  device.

* A bug in the ISO CD boot sequence which resulted in a panic has been fixed.

Testing by: lots of people, but David Rhodus found the most aggregious bugs.

    1: /*
    2:  * sound/386bsd/soundcard.c
    3:  * 
    4:  * Soundcard driver for 386BSD.
    5:  * 
    6:  * Copyright by Hannu Savolainen 1993
    7:  * 
    8:  * Redistribution and use in source and binary forms, with or without
    9:  * modification, are permitted provided that the following conditions are
   10:  * met: 1. Redistributions of source code must retain the above copyright
   11:  * notice, this list of conditions and the following disclaimer. 2.
   12:  * Redistributions in binary form must reproduce the above copyright notice,
   13:  * this list of conditions and the following disclaimer in the documentation
   14:  * and/or other materials provided with the distribution.
   15:  * 
   16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
   17:  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   18:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   19:  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   20:  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   22:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   23:  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26:  * SUCH DAMAGE.
   27:  *
   28:  * $FreeBSD: src/sys/i386/isa/sound/soundcard.c,v 1.87 1999/12/20 18:05:01 eivind Exp $
   29:  * $DragonFly: src/sys/dev/sound/isa/i386/soundcard.c,v 1.7 2004/05/19 22:52:50 dillon Exp $
   30:  *
   31:  */
   32: #include "use_snd.h"
   33: #include "sound_config.h"
   34: #if NSND > 0	/* from "snd.h" */
   35: #include "use_uart.h"
   36: 
   37: #include <sys/select.h>
   38: #include <vm/vm.h>
   39: #include <vm/pmap.h>
   40: #include <sys/mman.h>
   41: 
   42: #include <bus/isa/i386/isa_device.h>
   43: 
   44: 
   45: /*
   46: **  Register definitions for DMA controller 1 (channels 0..3):
   47: */
   48: #define	DMA1_CHN(c)	(IO_DMA1 + 1*(2*(c)))	/* addr reg for channel c */
   49: #define	DMA1_SMSK	(IO_DMA1 + 1*10)	/* single mask register */
   50: #define	DMA1_MODE	(IO_DMA1 + 1*11)	/* mode register */
   51: #define	DMA1_FFC	(IO_DMA1 + 1*12)	/* clear first/last FF */
   52: 
   53: /*
   54: **  Register definitions for DMA controller 2 (channels 4..7):
   55: */
   56: #define	DMA2_CHN(c)	(IO_DMA2 + 2*(2*(c)))	/* addr reg for channel c */
   57: #define	DMA2_SMSK	(IO_DMA2 + 2*10)	/* single mask register */
   58: #define	DMA2_MODE	(IO_DMA2 + 2*11)	/* mode register */
   59: #define	DMA2_FFC	(IO_DMA2 + 2*12)	/* clear first/last FF */
   60: 
   61: 
   62: #define FIX_RETURN(ret) {if ((ret)<0) return -(ret); else return 0;}
   63: 
   64: static int      soundcards_installed = 0; /* Number of installed soundcards */
   65: static int      soundcard_configured = 0;
   66: 
   67: static struct fileinfo files[SND_NDEVS];
   68: struct selinfo  selinfo[SND_NDEVS >> 4];
   69: 
   70: int
   71: MIDIbuf_poll (int dev, struct fileinfo *file, int events, select_table * wait);
   72: 
   73: int
   74: audio_poll(int dev, struct fileinfo * file, int events, select_table * wait);
   75: 
   76: int
   77: sequencer_poll (int dev, struct fileinfo *file, int events, select_table * wait);
   78: 
   79: static int sndprobe    (struct isa_device *);
   80: static int sndattach   (struct isa_device *);
   81: 
   82: static d_open_t sndopen;
   83: static d_close_t sndclose;
   84: static d_ioctl_t sndioctl;
   85: static d_read_t sndread;
   86: static d_write_t sndwrite;
   87: static d_poll_t sndpoll;
   88: static d_mmap_t sndmmap;
   89: 
   90: static char     driver_name[] = "snd";
   91: 
   92: #define CDEV_MAJOR 30
   93: static struct cdevsw snd_cdevsw = {
   94: 	/* name */	driver_name,
   95: 	/* maj */	CDEV_MAJOR,
   96: 	/* flags */	0,
   97: 	/* port */	NULL,
   98: 	/* clone */	NULL,
   99: 
  100: 	/* open */	sndopen,
  101: 	/* close */	sndclose,
  102: 	/* read */	sndread,
  103: 	/* write */	sndwrite,
  104: 	/* ioctl */	sndioctl,
  105: 	/* poll */	sndpoll,
  106: 	/* mmap */	sndmmap,
  107: 	/* strategy */	nostrategy,
  108: 	/* dump */	nodump,
  109: 	/* psize */	nopsize
  110: };
  111: 
  112: 
  113: 
  114: 
  115: static void     sound_mem_init(void);
  116: 
  117: /*
  118:  * for each "device XXX" entry in the config file, we have
  119:  * a struct isa_driver which is linked into isa_devtab_null[]
  120:  *
  121:  * XXX It is a bit stupid to call the generic routine so many times and
  122:  * switch then to the specific one, but the alternative way would be
  123:  * to replicate some code in the probe/attach routines.
  124:  */
  125: 
  126: struct isa_driver opldriver = {sndprobe, sndattach, "opl"};
  127: struct isa_driver trixdriver = {sndprobe, sndattach, "trix"};
  128: struct isa_driver trixsbdriver = {sndprobe, sndattach, "trixsb"};
  129: struct isa_driver sbdriver = {sndprobe, sndattach, "sb"};
  130: struct isa_driver sbxvidriver = {sndprobe, sndattach, "sbxvi"};
  131: struct isa_driver sbmididriver = {sndprobe, sndattach, "sbmidi"};
  132: struct isa_driver awedriver    = {sndprobe, sndattach, "awe"};
  133: struct isa_driver pasdriver = {sndprobe, sndattach, "pas"};
  134: struct isa_driver mpudriver = {sndprobe, sndattach, "mpu"};
  135: struct isa_driver gusdriver = {sndprobe, sndattach, "gus"};
  136: struct isa_driver gusxvidriver = {sndprobe, sndattach, "gusxvi"};
  137: struct isa_driver gusmaxdriver = {sndprobe, sndattach, "gusmax"};
  138: struct isa_driver uartdriver = {sndprobe, sndattach, "uart"};
  139: struct isa_driver mssdriver = {sndprobe, sndattach, "mss"};
  140: struct isa_driver cssdriver = {sndprobe, sndattach, "css"};
  141: struct isa_driver sscapedriver = {sndprobe, sndattach, "sscape"};
  142: struct isa_driver sscape_mssdriver = {sndprobe, sndattach, "sscape_mss"};
  143: struct isa_driver nssdriver = {sndprobe, sndattach, "nss"};
  144: 
  145: short ipri_to_irq(u_short ipri);
  146: 
  147: static ointhand2_t sndintr;
  148: 
  149: u_long
  150: get_time(void)
  151: {
  152:     struct timeval  timecopy;
  153: 
  154:     getmicrotime(&timecopy);
  155:     return timecopy.tv_usec / (1000000 / hz) +
  156: 		(u_long) timecopy.tv_sec * hz;
  157: }
  158: 
  159: static int
  160: sndmmap( dev_t dev, vm_offset_t offset, int nprot )
  161: {
  162: 	struct dma_buffparms * dmap;
  163: 	u_int min = minor(dev) >> 4;
  164: 
  165: 	if (min > 0 ) return (-1);
  166: 
  167: 	dmap =	audio_devs[min]->dmap_out;
  168: 
  169: 	if (nprot & PROT_EXEC)
  170: 		return( -1 );
  171: 	dmap->mapping_flags |= DMA_MAP_MAPPED ;
  172: 	return( i386_btop(vtophys(dmap->raw_buf) + offset) );
  173: }
  174: 
  175: 
  176: static int
  177: sndread(dev_t dev, struct uio * buf, int flag)
  178: {
  179:     int             count = buf->uio_resid;
  180:     u_int min = minor(dev);
  181: 
  182:     FIX_RETURN(sound_read_sw(min, &files[min], buf, count));
  183: }
  184: 
  185: 
  186: static int
  187: sndwrite(dev_t dev, struct uio * buf, int flag)
  188: {
  189:     int             count = buf->uio_resid;
  190:     u_int min = minor(dev);
  191: 
  192:     FIX_RETURN(sound_write_sw(min, &files[min], buf, count));
  193: }
  194: 
  195: static int
  196: sndopen(dev_t dev, int flags, int mode, struct proc * p)
  197: {
  198:     int             retval;
  199:     struct fileinfo tmp_file;
  200:     u_int min = minor(dev);
  201: 
  202:     if (!soundcard_configured && min) {
  203: 	printf("SoundCard Error: soundcard system has not been configured\n");
  204: 	return ENODEV ;
  205:     }
  206:     tmp_file.mode = 0;
  207: 
  208:     if (flags & FREAD && flags & FWRITE)
  209: 	tmp_file.mode = OPEN_READWRITE;
  210:     else if (flags & FREAD)
  211: 	tmp_file.mode = OPEN_READ;
  212:     else if (flags & FWRITE)
  213: 	tmp_file.mode = OPEN_WRITE;
  214: 
  215:     selinfo[min >> 4].si_pid = 0;
  216:     selinfo[min >> 4].si_flags = 0;
  217:     if ((retval = sound_open_sw(min, &tmp_file)) < 0)
  218: 	FIX_RETURN(retval);
  219: 
  220:     bcopy((char *) &tmp_file, (char *) &files[min], sizeof(tmp_file));
  221: 
  222:     FIX_RETURN(retval);
  223: }
  224: 
  225: 
  226: static int
  227: sndclose(dev_t dev, int flags, int mode, struct proc * p)
  228: {
  229:     u_int min = minor(dev);
  230: 
  231:     sound_release_sw(min, &files[min]);
  232:     return 0 ;
  233: }
  234: 
  235: static int
  236: sndioctl(dev_t dev, u_long cmd, caddr_t arg, int mode, struct proc * p)
  237: {
  238:     u_int min = minor(dev);
  239:     FIX_RETURN(sound_ioctl_sw(min, &files[min], cmd, arg));
  240: }
  241: 
  242: int
  243: sndpoll(dev_t dev, int events, struct proc * p)
  244: {
  245:     u_int min = minor(dev);
  246: 
  247:     /* printf ("snd_select(dev=%d, rw=%d, pid=%d)\n", min, rw, p->p_pid); */
  248: #ifdef ALLOW_POLL
  249:     switch (min & 0x0f) {
  250: #ifdef CONFIG_SEQUENCER
  251:     case SND_DEV_SEQ:
  252:     case SND_DEV_SEQ2:
  253: 	return sequencer_poll(min, &files[min], events, p);
  254: 	break;
  255: #endif
  256: 
  257: #ifdef CONFIG_MIDI
  258:     case SND_DEV_MIDIN:
  259: 	return MIDIbuf_poll(min, &files[min], events, p);
  260: 	break;
  261: #endif
  262: 
  263: #ifdef CONFIG_AUDIO
  264:     case SND_DEV_DSP:
  265:     case SND_DEV_DSP16:
  266:     case SND_DEV_AUDIO:
  267: 
  268: 	return audio_poll(min, &files[min], events, p);
  269: 	break;
  270: #endif
  271: 
  272:     default:
  273: 	return 0;
  274:     }
  275: 
  276: #endif	/* ALLOW_POLL */
  277:     DEB(printf("sound_ioctl(min=%d, cmd=0x%x, arg=0x%x)\n", min, cmd, arg));
  278: 
  279:     return 0 ;
  280: }
  281: 
  282: /* XXX this should become ffs(ipri), perhaps -1 lr 970705 */
  283: short
  284: ipri_to_irq(u_short ipri)
  285: {
  286:     /*
  287:      * Converts the ipri (bitmask) to the corresponding irq number
  288:      */
  289:     int             irq;
  290: 
  291:     for (irq = 0; irq < 16; irq++)
  292: 	if (ipri == (1 << irq))
  293: 	    return irq;
  294: 
  295:     return -1;		/* Invalid argument */
  296: }
  297: 
  298: static int
  299: driver_to_voxunit(struct isa_driver * driver)
  300: {
  301:     /*
  302:      * converts a sound driver pointer into the equivalent VoxWare device
  303:      * unit number
  304:      */
  305:     if (driver == &opldriver)
  306: 	return (SNDCARD_ADLIB);
  307:     else if (driver == &sbdriver)
  308: 	return (SNDCARD_SB);
  309:     else if (driver == &pasdriver)
  310: 	return (SNDCARD_PAS);
  311:     else if (driver == &gusdriver)
  312: 	return (SNDCARD_GUS);
  313:     else if (driver == &mpudriver)
  314: 	return (SNDCARD_MPU401);
  315:     else if (driver == &sbxvidriver)
  316: 	return (SNDCARD_SB16);
  317:     else if (driver == &sbmididriver)
  318: 	return (SNDCARD_SB16MIDI);
  319:     else if(driver == &awedriver)
  320: 	return(SNDCARD_AWE32);
  321:     else if (driver == &uartdriver)
  322: 	return (SNDCARD_UART6850);
  323:     else if (driver == &gusdriver)
  324: 	return (SNDCARD_GUS16);
  325:     else if (driver == &mssdriver)
  326: 	return (SNDCARD_MSS);
  327:     else if (driver == &cssdriver)
  328: 	return (SNDCARD_CS4232);
  329:     else if (driver == &sscapedriver)
  330: 	return(SNDCARD_SSCAPE);
  331:     else if (driver == &sscape_mssdriver)
  332: 	return(SNDCARD_SSCAPE_MSS);
  333:     else if (driver == &trixdriver)
  334: 	return (SNDCARD_TRXPRO);
  335:     else if (driver == &trixsbdriver)
  336: 	return (SNDCARD_TRXPRO_SB);
  337:     else if (driver == &nssdriver)
  338: 	return (SNDCARD_NSS);
  339:     else
  340: 	return (0);
  341: }
  342: 
  343: /*
  344:  * very dirty: tmp_osp is allocated in sndprobe, and used at the next
  345:  * call in sndattach
  346:  */
  347: 
  348: static sound_os_info *temp_osp;
  349: 
  350: /*
  351:  * sndprobe is called for each isa_device. From here, a voxware unit
  352:  * number is determined, and the appropriate probe routine is selected.
  353:  * The parameters from the config line are passed to the hw_config struct.
  354:  */
  355: 
  356: static int
  357: sndprobe(struct isa_device * dev)
  358: {
  359:     struct address_info hw_config;
  360:     int             unit;
  361: 
  362:     temp_osp = (sound_os_info *)malloc(sizeof(sound_os_info),
  363: 	    M_DEVBUF, M_NOWAIT);
  364:     if (!temp_osp)
  365: 	panic("SOUND: Cannot allocate memory\n");
  366: 
  367:     /*
  368:      * get config info from the kernel config. These may be overridden
  369:      * by the local autoconfiguration routines though (e.g. pnp stuff).
  370:      */
  371: 
  372:     hw_config.io_base = dev->id_iobase;
  373:     hw_config.irq = ipri_to_irq(dev->id_irq);
  374:     hw_config.dma = dev->id_drq;
  375: 
  376:     /*
  377:      * misuse the flags field for read dma. Note that, to use 0 as
  378:      * read dma channel, one of the high bits should be set.  lr970705 XXX
  379:      */
  380: 
  381:     if (dev->id_flags != 0)
  382: 	hw_config.dma2 = dev->id_flags & 0x7;
  383:     else
  384: 	hw_config.dma2 = -1;
  385: 
  386:     hw_config.always_detect = 0;
  387:     hw_config.name = NULL;
  388:     hw_config.card_subtype = 0;
  389: 
  390:     temp_osp->unit = dev->id_unit;
  391:     hw_config.osp = temp_osp;
  392:     unit = driver_to_voxunit(dev->id_driver);
  393: 
  394:     if (sndtable_probe(unit, &hw_config)) {
  395: 	dev->id_iobase = hw_config.io_base;
  396: 	dev->id_irq =  hw_config.irq == -1 ? 0 : (1 << hw_config.irq);
  397: 	dev->id_drq = hw_config.dma;
  398: 
  399: 	if (hw_config.dma != hw_config.dma2 && ( hw_config.dma2 != -1))
  400: 	    dev->id_flags = hw_config.dma2 | 0x100; /* XXX lr */
  401: 	else
  402: 	    dev->id_flags = 0;
  403: 	return TRUE;
  404:     }
  405:     return 0;
  406: }
  407: 
  408: static int
  409: sndattach(struct isa_device * dev)
  410: {
  411:     int             unit;
  412:     static int      midi_initialized = 0;
  413:     static int      seq_initialized = 0;
  414:     struct address_info hw_config;
  415:     char   *dname;
  416: 
  417:     /*
  418:      * Associate interrupt handlers with devices.  XXX this may be incomplete.
  419:      */
  420:     dname = dev->id_driver->name;
  421: #if defined(CONFIG_AD1848)
  422:     if (strcmp(dname, "css") == 0 || strcmp(dname, "gusxvi") == 0 ||
  423: 	strcmp(dname, "mss") == 0)
  424: 	dev->id_ointr = adintr;
  425: #endif
  426: #ifdef CONFIG_GUS
  427:     if (strcmp(dname, "gus") == 0)
  428: 	dev->id_ointr = gusintr;
  429: #endif
  430: #ifdef CONFIG_PAS
  431:     if (strcmp(dname, "pas") == 0)
  432: 	dev->id_ointr = pasintr;
  433: #endif
  434: #if NSB > 0 && (defined(CONFIG_MIDI) || defined(CONFIG_AUDIO))
  435:     if (strcmp(dname, "sb") == 0)
  436: 	dev->id_ointr = sbintr;
  437: #endif
  438:     if (strcmp(dname, "sscape_mss") == 0)
  439: 	dev->id_ointr = sndintr;
  440: #if NSSCAPE > 0
  441:     if (strcmp(dname, "sscape") == 0 || strcmp(dname, "trix") == 0)
  442: 	dev->id_ointr = sscapeintr;
  443: #endif
  444: #if NUART > 0
  445:     if (strcmp(dname, "uart0") == 0)
  446: 	dev->id_ointr = m6850intr;
  447: #endif
  448: #if NMPU > 0 && defined(CONFIG_MIDI)
  449:     if (strcmp(dname, "mpu") == 0)
  450: 	dev->id_ointr = mpuintr;
  451: #endif
  452: #if NNSS > 0
  453:     if (strcmp(dname, "nss") == 0)
  454: 	dev->id_ointr = nssintr;
  455: #endif
  456: 
  457:     unit = driver_to_voxunit(dev->id_driver);
  458:     hw_config.io_base = dev->id_iobase;
  459:     hw_config.irq = ipri_to_irq(dev->id_irq);
  460:     hw_config.dma = dev->id_drq;
  461: 
  462:     /* misuse the flags field for read dma */
  463:     if (dev->id_flags != 0)
  464: 	hw_config.dma2 = dev->id_flags & 0x7;
  465:     else
  466: 	hw_config.dma2 = -1;
  467: 
  468:     hw_config.card_subtype = 0;
  469:     hw_config.osp = temp_osp;
  470: 
  471:     if (!unit)
  472: 	return FALSE;
  473: 
  474:     if (!(sndtable_init_card(unit, &hw_config))) {	/* init card */
  475: 	printf(" <Driver not configured>");
  476: 	return FALSE;
  477:     }
  478:     /*
  479:      * Init the high level sound driver
  480:      */
  481: 
  482:     if (!(soundcards_installed = sndtable_get_cardcount())) {
  483: 	DDB(printf("No drivers actually installed\n"));
  484: 	return FALSE;	/* No cards detected */
  485:     }
  486:     printf("\n");
  487: 
  488: #ifdef CONFIG_AUDIO
  489:     if (num_audiodevs) {	/* Audio devices present */
  490: 	DMAbuf_init();
  491: 	sound_mem_init();
  492:     }
  493:     soundcard_configured = 1;
  494: #endif
  495: 
  496:     if (num_midis && !midi_initialized)
  497: 	midi_initialized = 1;
  498: 
  499:     if ((num_midis + num_synths) && !seq_initialized) {
  500: 	seq_initialized = 1;
  501: 	sequencer_init();
  502:     }
  503: 
  504:     cdevsw_add(&snd_cdevsw, 0xf0, dev->id_unit << 4);
  505: #define GID_SND GID_GAMES
  506: #define UID_SND UID_ROOT
  507: #define PERM_SND 0660
  508:     /*
  509:      *	make links to first successfully probed device, don't do it if
  510:      *	duplicate creation of same node failed (ie. bad cookie returned)
  511:      */
  512:     if (dev->id_driver == &opldriver){
  513: 	make_dev(&snd_cdevsw, (dev->id_unit << 4) | SND_DEV_SEQ,
  514: 	    UID_SND, GID_SND, PERM_SND, "sequencer%r", dev->id_unit);
  515:     } else if (dev->id_driver == &mpudriver || 
  516:                dev->id_driver == &sbmididriver ||
  517: 	       dev->id_driver == &uartdriver){
  518: 	make_dev(&snd_cdevsw, (dev->id_unit << 4) | SND_DEV_MIDIN,
  519: 	    UID_SND, GID_SND, PERM_SND, "midi%r", dev->id_unit);
  520:     } else {
  521: 	make_dev(&snd_cdevsw, (dev->id_unit << 4) | SND_DEV_DSP,
  522: 	    UID_SND, GID_SND, PERM_SND, "dsp%r", dev->id_unit);
  523: 	make_dev(&snd_cdevsw, (dev->id_unit << 4) | SND_DEV_DSP16,
  524: 	    UID_SND, GID_SND, PERM_SND, "dspW%r", dev->id_unit);
  525: 	make_dev(&snd_cdevsw, (dev->id_unit << 4) | SND_DEV_AUDIO,
  526: 	    UID_SND, GID_SND, PERM_SND, "audio%r", dev->id_unit);
  527: 	make_dev(&snd_cdevsw, (dev->id_unit << 4) | SND_DEV_CTL,
  528: 	    UID_SND, GID_SND, PERM_SND, "mixer%r", dev->id_unit);
  529: 	make_dev(&snd_cdevsw, (dev->id_unit << 4) | SND_DEV_STATUS,
  530: 	    UID_SND, GID_SND, PERM_SND, "sndstat%r", dev->id_unit);
  531:     }
  532:     return TRUE;
  533: }
  534: 
  535: 
  536: #ifdef CONFIG_AUDIO
  537: 
  538: static void
  539: alloc_dmap(int dev, int chan, struct dma_buffparms * dmap)
  540: {
  541:     char           *tmpbuf;
  542:     int            i;
  543: 
  544:     tmpbuf = contigmalloc(audio_devs[dev]->buffsize, M_DEVBUF, M_NOWAIT,
  545: 		0ul, 0xfffffful, 1ul, chan & 4 ? 0x20000ul : 0x10000ul);
  546:     if (tmpbuf == NULL)
  547: 	printf("soundcard buffer alloc failed \n");
  548: 
  549:     if (tmpbuf == NULL) {
  550: 	printf("snd: Unable to allocate %d bytes of buffer\n",
  551: 	       2 * (int) audio_devs[dev]->buffsize);
  552: 	return;
  553:     }
  554:     dmap->raw_buf = tmpbuf;
  555:     /*
  556:      * Use virtual address as the physical address, since isa_dmastart
  557:      * performs the phys address computation.
  558:      */
  559: 
  560:     dmap->raw_buf_phys = (uintptr_t) tmpbuf;
  561:     for (i = 0; i < audio_devs[dev]->buffsize; i++)   *tmpbuf++ = 0x80; 
  562: 
  563: }
  564: 
  565: static void
  566: sound_mem_init(void)
  567: {
  568:     int             dev;
  569:     static u_long dsp_init_mask = 0;
  570: 
  571:     for (dev = 0; dev < num_audiodevs; dev++)	/* Enumerate devices */
  572: 	if (!(dsp_init_mask & (1 << dev)))	/* Not already done */
  573: 	    if (audio_devs[dev]->dmachan1 >= 0) {
  574: 		dsp_init_mask |= (1 << dev);
  575: 		audio_devs[dev]->buffsize = DSP_BUFFSIZE;
  576: 		/* Now allocate the buffers */
  577: 		alloc_dmap(dev, audio_devs[dev]->dmachan1,
  578: 			audio_devs[dev]->dmap_out);
  579: 		if (audio_devs[dev]->flags & DMA_DUPLEX)
  580: 		    alloc_dmap(dev, audio_devs[dev]->dmachan2,
  581: 			    audio_devs[dev]->dmap_in);
  582: 	    }	/* for dev */
  583: }
  584: 
  585: #endif
  586: 
  587: 
  588: int
  589: snd_ioctl_return(int *addr, int value)
  590: {
  591:     if (value < 0)
  592: 	return value;	/* Error */
  593:     suword(addr, value);
  594:     return 0;
  595: }
  596: 
  597: #define MAX_UNIT 50
  598: typedef void    (*irq_proc_t) (int irq);
  599: static irq_proc_t irq_proc[MAX_UNIT] = {NULL};
  600: static int      irq_irq[MAX_UNIT] = {0};
  601: 
  602: int
  603: snd_set_irq_handler(int int_lvl, void (*hndlr) (int), sound_os_info * osp)
  604: {
  605:     if (osp->unit >= MAX_UNIT) {
  606: 	printf("Sound error: Unit number too high (%d)\n", osp->unit);
  607: 	return 0;
  608:     }
  609:     irq_proc[osp->unit] = hndlr;
  610:     irq_irq[osp->unit] = int_lvl;
  611:     return 1;
  612: }
  613: 
  614: static void
  615: sndintr(int unit)
  616: {
  617:     if ( (unit >= MAX_UNIT) || (irq_proc[unit] == NULL) )
  618: 	return;
  619: 
  620:     irq_proc[unit] (irq_irq[unit]);	/* Call the installed handler */
  621: }
  622: 
  623: void
  624: conf_printf(char *name, struct address_info * hw_config)
  625: {
  626:     if (!trace_init)
  627: 	return;
  628: 
  629:     printf("snd0: <%s> ", name);
  630: #if 0
  631:     if (hw_config->io_base != -1 ) 
  632:     printf("at 0x%03x", hw_config->io_base);
  633: 
  634:     if (hw_config->irq != -1 )
  635: 	printf(" irq %d", hw_config->irq);
  636: 
  637:     if (hw_config->dma != -1 || hw_config->dma2 != -1) {
  638: 	printf(" dma %d", hw_config->dma);
  639: 	if (hw_config->dma2 != -1)
  640: 	    printf(",%d", hw_config->dma2);
  641:     }
  642: #endif
  643: 
  644: }
  645: 
  646: void
  647: conf_printf2(char *name, int base, int irq, int dma, int dma2)
  648: {
  649:     if (!trace_init)
  650: 	return;
  651: 
  652:     printf("snd0: <%s> ", name);
  653: #if 0
  654:     if (hw_config->io_base != -1 ) 
  655:     printf("at 0x%03x", hw_config->io_base);
  656: 
  657:     if (irq)
  658: 	printf(" irq %d", irq);
  659: 
  660:     if (dma != -1 || dma2 != -1) {
  661: 	printf(" dma %d", dma);
  662: 	if (dma2 != -1)
  663: 	    printf(",%d", dma2);
  664:     }
  665: #endif
  666: 
  667: }
  668: 
  669: 
  670: void tenmicrosec (int j)
  671: {
  672:   int             i, k;
  673:   for (k = 0; k < j/10 ; k++) {
  674:       for (i = 0; i < 16; i++)
  675: 	  inb (0x80);
  676:   }
  677: }
  678: 
  679: #endif	/* NSND > 0 */
  680: 
  681: 
  682: 
  683: