isa_dma.c revision 146214
145720Speter/*- 245720Speter * Copyright (c) 1991 The Regents of the University of California. 345720Speter * All rights reserved. 445720Speter * 545720Speter * This code is derived from software contributed to Berkeley by 645720Speter * William Jolitz. 745720Speter * 845720Speter * Redistribution and use in source and binary forms, with or without 945720Speter * modification, are permitted provided that the following conditions 1045720Speter * are met: 1145720Speter * 1. Redistributions of source code must retain the above copyright 1245720Speter * notice, this list of conditions and the following disclaimer. 1345720Speter * 2. Redistributions in binary form must reproduce the above copyright 1445720Speter * notice, this list of conditions and the following disclaimer in the 1545720Speter * documentation and/or other materials provided with the distribution. 1645720Speter * 4. Neither the name of the University nor the names of its contributors 1745720Speter * may be used to endorse or promote products derived from this software 1845720Speter * without specific prior written permission. 1945720Speter * 2045720Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2145720Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2245720Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2345720Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2445720Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2545720Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2645720Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2745720Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2845720Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2945720Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3045720Speter * SUCH DAMAGE. 3145720Speter * 3245720Speter * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 3345720Speter */ 3445720Speter 35115703Sobrien#include <sys/cdefs.h> 36115703Sobrien__FBSDID("$FreeBSD: head/sys/i386/isa/isa_dma.c 146214 2005-05-14 10:14:56Z nyan $"); 37115703Sobrien 3845720Speter/* 3945720Speter * code to manage AT bus 4045720Speter * 4145720Speter * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 4245720Speter * Fixed uninitialized variable problem and added code to deal 4345720Speter * with DMA page boundaries in isa_dmarangecheck(). Fixed word 4445720Speter * mode DMA count compution and reorganized DMA setup code in 4545720Speter * isa_dmastart() 4645720Speter */ 4745720Speter 4845720Speter#include <sys/param.h> 4945720Speter#include <sys/systm.h> 5061994Smsmith#include <sys/bus.h> 5161994Smsmith#include <sys/kernel.h> 5245720Speter#include <sys/malloc.h> 5377081Salfred#include <sys/lock.h> 5479224Sdillon#include <sys/proc.h> 5577081Salfred#include <sys/mutex.h> 5661994Smsmith#include <sys/module.h> 5745720Speter#include <vm/vm.h> 5845720Speter#include <vm/vm_param.h> 5945720Speter#include <vm/pmap.h> 60146214Snyan#include <isa/isareg.h> 6161994Smsmith#include <isa/isavar.h> 62146214Snyan#include <isa/isa_dmareg.h> 6345720Speter 6492765Salfredstatic int isa_dmarangecheck(caddr_t va, u_int length, int chan); 6545720Speter 6645720Speterstatic caddr_t dma_bouncebuf[8]; 6745720Speterstatic u_int dma_bouncebufsize[8]; 6845720Speterstatic u_int8_t dma_bounced = 0; 6945720Speterstatic u_int8_t dma_busy = 0; /* Used in isa_dmastart() */ 7045720Speterstatic u_int8_t dma_inuse = 0; /* User for acquire/release */ 7145720Speterstatic u_int8_t dma_auto_mode = 0; 7245720Speter 7345720Speter#define VALID_DMA_MASK (7) 7445720Speter 7545720Speter/* high byte of address is stored in this port for i-th dma channel */ 7645720Speterstatic int dmapageport[8] = { 0x87, 0x83, 0x81, 0x82, 0x8f, 0x8b, 0x89, 0x8a }; 7745720Speter 7845720Speter/* 7945720Speter * Setup a DMA channel's bounce buffer. 8045720Speter */ 81135262Sphkint 82135262Sphkisa_dma_init(int chan, u_int bouncebufsize, int flag) 8345720Speter{ 8445720Speter void *buf; 8545720Speter 86131647Sphk /* 87135262Sphk * If a DMA channel is shared, both drivers have to call isa_dma_init 88131647Sphk * since they don't know that the other driver will do it. 89131647Sphk * Just return if we're already set up good. 90131647Sphk * XXX: this only works if they agree on the bouncebuf size. This 91131647Sphk * XXX: is typically the case since they are multiple instances of 92131647Sphk * XXX: the same driver. 93131647Sphk */ 94131647Sphk if (dma_bouncebuf[chan] != NULL) 95135262Sphk return (0); 96131647Sphk 9745720Speter#ifdef DIAGNOSTIC 9845720Speter if (chan & ~VALID_DMA_MASK) 99135262Sphk panic("isa_dma_init: channel out of range"); 10045720Speter#endif 10145720Speter 10245720Speter dma_bouncebufsize[chan] = bouncebufsize; 10345720Speter 10445720Speter /* Try malloc() first. It works better if it works. */ 105135262Sphk buf = malloc(bouncebufsize, M_DEVBUF, flag); 10645720Speter if (buf != NULL) { 10745720Speter if (isa_dmarangecheck(buf, bouncebufsize, chan) == 0) { 10845720Speter dma_bouncebuf[chan] = buf; 109135262Sphk return (0); 11045720Speter } 11145720Speter free(buf, M_DEVBUF); 11245720Speter } 113135262Sphk buf = contigmalloc(bouncebufsize, M_DEVBUF, flag, 0ul, 0xfffffful, 11445720Speter 1ul, chan & 4 ? 0x20000ul : 0x10000ul); 11545720Speter if (buf == NULL) 116135262Sphk return (ENOMEM); 117135262Sphk dma_bouncebuf[chan] = buf; 118135262Sphk return (0); 11945720Speter} 12045720Speter 12145720Speter/* 12245720Speter * Register a DMA channel's usage. Usually called from a device driver 12345720Speter * in open() or during its initialization. 12445720Speter */ 12545720Speterint 12645720Speterisa_dma_acquire(chan) 12745720Speter int chan; 12845720Speter{ 12945720Speter#ifdef DIAGNOSTIC 13045720Speter if (chan & ~VALID_DMA_MASK) 13145720Speter panic("isa_dma_acquire: channel out of range"); 13245720Speter#endif 13345720Speter 13445720Speter if (dma_inuse & (1 << chan)) { 13545720Speter printf("isa_dma_acquire: channel %d already in use\n", chan); 13645720Speter return (EBUSY); 13745720Speter } 13845720Speter dma_inuse |= (1 << chan); 13945720Speter dma_auto_mode &= ~(1 << chan); 14045720Speter 14145720Speter return (0); 14245720Speter} 14345720Speter 14445720Speter/* 14545720Speter * Unregister a DMA channel's usage. Usually called from a device driver 14645720Speter * during close() or during its shutdown. 14745720Speter */ 14845720Spetervoid 14945720Speterisa_dma_release(chan) 15045720Speter int chan; 15145720Speter{ 15245720Speter#ifdef DIAGNOSTIC 15345720Speter if (chan & ~VALID_DMA_MASK) 15445720Speter panic("isa_dma_release: channel out of range"); 15545720Speter 15645720Speter if ((dma_inuse & (1 << chan)) == 0) 15745720Speter printf("isa_dma_release: channel %d not in use\n", chan); 15845720Speter#endif 15945720Speter 16045720Speter if (dma_busy & (1 << chan)) { 16145720Speter dma_busy &= ~(1 << chan); 16245720Speter /* 16345720Speter * XXX We should also do "dma_bounced &= (1 << chan);" 16445720Speter * because we are acting on behalf of isa_dmadone() which 16545720Speter * was not called to end the last DMA operation. This does 16645720Speter * not matter now, but it may in the future. 16745720Speter */ 16845720Speter } 16945720Speter 17045720Speter dma_inuse &= ~(1 << chan); 17145720Speter dma_auto_mode &= ~(1 << chan); 17245720Speter} 17345720Speter 17445720Speter/* 17545720Speter * isa_dmacascade(): program 8237 DMA controller channel to accept 17645720Speter * external dma control by a board. 17745720Speter */ 17845720Spetervoid 17945720Speterisa_dmacascade(chan) 18045720Speter int chan; 18145720Speter{ 18245720Speter#ifdef DIAGNOSTIC 18345720Speter if (chan & ~VALID_DMA_MASK) 18445720Speter panic("isa_dmacascade: channel out of range"); 18545720Speter#endif 18645720Speter 18745720Speter /* set dma channel mode, and set dma channel mode */ 18845720Speter if ((chan & 4) == 0) { 18945720Speter outb(DMA1_MODE, DMA37MD_CASCADE | chan); 19045720Speter outb(DMA1_SMSK, chan); 19145720Speter } else { 19245720Speter outb(DMA2_MODE, DMA37MD_CASCADE | (chan & 3)); 19345720Speter outb(DMA2_SMSK, chan & 3); 19445720Speter } 19545720Speter} 19645720Speter 19745720Speter/* 19845720Speter * isa_dmastart(): program 8237 DMA controller channel, avoid page alignment 19945720Speter * problems by using a bounce buffer. 20045720Speter */ 20145720Spetervoid 20245720Speterisa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan) 20345720Speter{ 204112569Sjake vm_paddr_t phys; 20545720Speter int waport; 20645720Speter caddr_t newaddr; 20745720Speter 20879224Sdillon GIANT_REQUIRED; 20979224Sdillon 21045720Speter#ifdef DIAGNOSTIC 21145720Speter if (chan & ~VALID_DMA_MASK) 21245720Speter panic("isa_dmastart: channel out of range"); 21345720Speter 21445720Speter if ((chan < 4 && nbytes > (1<<16)) 21545720Speter || (chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1))) 21645720Speter panic("isa_dmastart: impossible request"); 21745720Speter 21845720Speter if ((dma_inuse & (1 << chan)) == 0) 21945720Speter printf("isa_dmastart: channel %d not acquired\n", chan); 22045720Speter#endif 22145720Speter 22245720Speter#if 0 22345720Speter /* 22445720Speter * XXX This should be checked, but drivers like ad1848 only call 22545720Speter * isa_dmastart() once because they use Auto DMA mode. If we 22645720Speter * leave this in, drivers that do this will print this continuously. 22745720Speter */ 22845720Speter if (dma_busy & (1 << chan)) 22945720Speter printf("isa_dmastart: channel %d busy\n", chan); 23045720Speter#endif 23145720Speter 23245720Speter dma_busy |= (1 << chan); 23345720Speter 23445720Speter if (isa_dmarangecheck(addr, nbytes, chan)) { 23545720Speter if (dma_bouncebuf[chan] == NULL 23645720Speter || dma_bouncebufsize[chan] < nbytes) 23745720Speter panic("isa_dmastart: bad bounce buffer"); 23845720Speter dma_bounced |= (1 << chan); 23945720Speter newaddr = dma_bouncebuf[chan]; 24045720Speter 24145720Speter /* copy bounce buffer on write */ 24257973Sphk if (!(flags & ISADMA_READ)) 24345720Speter bcopy(addr, newaddr, nbytes); 24445720Speter addr = newaddr; 24545720Speter } 24645720Speter 24745720Speter /* translate to physical */ 24895710Speter phys = pmap_extract(kernel_pmap, (vm_offset_t)addr); 24945720Speter 25057973Sphk if (flags & ISADMA_RAW) { 25145720Speter dma_auto_mode |= (1 << chan); 25245720Speter } else { 25345720Speter dma_auto_mode &= ~(1 << chan); 25445720Speter } 25545720Speter 25645720Speter if ((chan & 4) == 0) { 25745720Speter /* 25845720Speter * Program one of DMA channels 0..3. These are 25945720Speter * byte mode channels. 26045720Speter */ 26145720Speter /* set dma channel mode, and reset address ff */ 26245720Speter 26357973Sphk /* If ISADMA_RAW flag is set, then use autoinitialise mode */ 26457973Sphk if (flags & ISADMA_RAW) { 26557973Sphk if (flags & ISADMA_READ) 26645720Speter outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_WRITE|chan); 26745720Speter else 26845720Speter outb(DMA1_MODE, DMA37MD_AUTO|DMA37MD_READ|chan); 26945720Speter } 27045720Speter else 27157973Sphk if (flags & ISADMA_READ) 27245720Speter outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|chan); 27345720Speter else 27445720Speter outb(DMA1_MODE, DMA37MD_SINGLE|DMA37MD_READ|chan); 27545720Speter outb(DMA1_FFC, 0); 27645720Speter 27745720Speter /* send start address */ 27845720Speter waport = DMA1_CHN(chan); 27945720Speter outb(waport, phys); 28045720Speter outb(waport, phys>>8); 28145720Speter outb(dmapageport[chan], phys>>16); 28245720Speter 28345720Speter /* send count */ 28445720Speter outb(waport + 1, --nbytes); 28545720Speter outb(waport + 1, nbytes>>8); 28645720Speter 28745720Speter /* unmask channel */ 28845720Speter outb(DMA1_SMSK, chan); 28945720Speter } else { 29045720Speter /* 29145720Speter * Program one of DMA channels 4..7. These are 29245720Speter * word mode channels. 29345720Speter */ 29445720Speter /* set dma channel mode, and reset address ff */ 29545720Speter 29657973Sphk /* If ISADMA_RAW flag is set, then use autoinitialise mode */ 29757973Sphk if (flags & ISADMA_RAW) { 29857973Sphk if (flags & ISADMA_READ) 29945720Speter outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_WRITE|(chan&3)); 30045720Speter else 30145720Speter outb(DMA2_MODE, DMA37MD_AUTO|DMA37MD_READ|(chan&3)); 30245720Speter } 30345720Speter else 30457973Sphk if (flags & ISADMA_READ) 30545720Speter outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_WRITE|(chan&3)); 30645720Speter else 30745720Speter outb(DMA2_MODE, DMA37MD_SINGLE|DMA37MD_READ|(chan&3)); 30845720Speter outb(DMA2_FFC, 0); 30945720Speter 31045720Speter /* send start address */ 31145720Speter waport = DMA2_CHN(chan - 4); 31245720Speter outb(waport, phys>>1); 31345720Speter outb(waport, phys>>9); 31445720Speter outb(dmapageport[chan], phys>>16); 31545720Speter 31645720Speter /* send count */ 31745720Speter nbytes >>= 1; 31845720Speter outb(waport + 2, --nbytes); 31945720Speter outb(waport + 2, nbytes>>8); 32045720Speter 32145720Speter /* unmask channel */ 32245720Speter outb(DMA2_SMSK, chan & 3); 32345720Speter } 32445720Speter} 32545720Speter 32645720Spetervoid 32745720Speterisa_dmadone(int flags, caddr_t addr, int nbytes, int chan) 32845720Speter{ 32945720Speter#ifdef DIAGNOSTIC 33045720Speter if (chan & ~VALID_DMA_MASK) 33145720Speter panic("isa_dmadone: channel out of range"); 33245720Speter 33345720Speter if ((dma_inuse & (1 << chan)) == 0) 33445720Speter printf("isa_dmadone: channel %d not acquired\n", chan); 33545720Speter#endif 33645720Speter 33745720Speter if (((dma_busy & (1 << chan)) == 0) && 33845720Speter (dma_auto_mode & (1 << chan)) == 0 ) 33945720Speter printf("isa_dmadone: channel %d not busy\n", chan); 34045720Speter 34145720Speter if ((dma_auto_mode & (1 << chan)) == 0) 34245720Speter outb(chan & 4 ? DMA2_SMSK : DMA1_SMSK, (chan & 3) | 4); 34345720Speter 34445720Speter if (dma_bounced & (1 << chan)) { 34545720Speter /* copy bounce buffer on read */ 34657973Sphk if (flags & ISADMA_READ) 34745720Speter bcopy(dma_bouncebuf[chan], addr, nbytes); 34845720Speter 34945720Speter dma_bounced &= ~(1 << chan); 35045720Speter } 35145720Speter dma_busy &= ~(1 << chan); 35245720Speter} 35345720Speter 35445720Speter/* 35545720Speter * Check for problems with the address range of a DMA transfer 35645720Speter * (non-contiguous physical pages, outside of bus address space, 35745720Speter * crossing DMA page boundaries). 35845720Speter * Return true if special handling needed. 35945720Speter */ 36045720Speter 36145720Speterstatic int 36245720Speterisa_dmarangecheck(caddr_t va, u_int length, int chan) 36345720Speter{ 364112569Sjake vm_paddr_t phys, priorpage = 0; 365112569Sjake vm_offset_t endva; 36645720Speter u_int dma_pgmsk = (chan & 4) ? ~(128*1024-1) : ~(64*1024-1); 36745720Speter 36879224Sdillon GIANT_REQUIRED; 36979224Sdillon 37045720Speter endva = (vm_offset_t)round_page((vm_offset_t)va + length); 37145720Speter for (; va < (caddr_t) endva ; va += PAGE_SIZE) { 37295710Speter phys = trunc_page(pmap_extract(kernel_pmap, (vm_offset_t)va)); 37345720Speter#define ISARAM_END RAM_END 37445720Speter if (phys == 0) 37545720Speter panic("isa_dmacheck: no physical page present"); 37645720Speter if (phys >= ISARAM_END) 37745720Speter return (1); 37845720Speter if (priorpage) { 37945720Speter if (priorpage + PAGE_SIZE != phys) 38045720Speter return (1); 38145720Speter /* check if crossing a DMA page boundary */ 38245720Speter if (((u_int)priorpage ^ (u_int)phys) & dma_pgmsk) 38345720Speter return (1); 38445720Speter } 38545720Speter priorpage = phys; 38645720Speter } 38745720Speter return (0); 38845720Speter} 38945720Speter 39045720Speter/* 39145720Speter * Query the progress of a transfer on a DMA channel. 39245720Speter * 39345720Speter * To avoid having to interrupt a transfer in progress, we sample 39445720Speter * each of the high and low databytes twice, and apply the following 39545720Speter * logic to determine the correct count. 39645720Speter * 39745720Speter * Reads are performed with interrupts disabled, thus it is to be 39845720Speter * expected that the time between reads is very small. At most 39945720Speter * one rollover in the low count byte can be expected within the 40045720Speter * four reads that are performed. 40145720Speter * 40245720Speter * There are three gaps in which a rollover can occur : 40345720Speter * 40445720Speter * - read low1 40545720Speter * gap1 40645720Speter * - read high1 40745720Speter * gap2 40845720Speter * - read low2 40945720Speter * gap3 41045720Speter * - read high2 41145720Speter * 41245720Speter * If a rollover occurs in gap1 or gap2, the low2 value will be 41345720Speter * greater than the low1 value. In this case, low2 and high2 are a 41445720Speter * corresponding pair. 41545720Speter * 41645720Speter * In any other case, low1 and high1 can be considered to be correct. 41745720Speter * 41845720Speter * The function returns the number of bytes remaining in the transfer, 41945720Speter * or -1 if the channel requested is not active. 42045720Speter * 42145720Speter */ 42245720Speterint 42345720Speterisa_dmastatus(int chan) 42445720Speter{ 42545720Speter u_long cnt = 0; 42645720Speter int ffport, waport; 42745720Speter u_long low1, high1, low2, high2; 42845720Speter 42945720Speter /* channel active? */ 43045720Speter if ((dma_inuse & (1 << chan)) == 0) { 43145720Speter printf("isa_dmastatus: channel %d not active\n", chan); 43245720Speter return(-1); 43345720Speter } 43445720Speter /* channel busy? */ 43545720Speter 43645720Speter if (((dma_busy & (1 << chan)) == 0) && 43745720Speter (dma_auto_mode & (1 << chan)) == 0 ) { 43845720Speter printf("chan %d not busy\n", chan); 43945720Speter return -2 ; 44045720Speter } 44145720Speter if (chan < 4) { /* low DMA controller */ 44245720Speter ffport = DMA1_FFC; 44345720Speter waport = DMA1_CHN(chan) + 1; 44445720Speter } else { /* high DMA controller */ 44545720Speter ffport = DMA2_FFC; 44645720Speter waport = DMA2_CHN(chan - 4) + 2; 44745720Speter } 44845720Speter 44945720Speter disable_intr(); /* no interrupts Mr Jones! */ 45045720Speter outb(ffport, 0); /* clear register LSB flipflop */ 45145720Speter low1 = inb(waport); 45245720Speter high1 = inb(waport); 45345720Speter outb(ffport, 0); /* clear again */ 45445720Speter low2 = inb(waport); 45545720Speter high2 = inb(waport); 45645720Speter enable_intr(); /* enable interrupts again */ 45745720Speter 45845720Speter /* 45945720Speter * Now decide if a wrap has tried to skew our results. 46045720Speter * Note that after TC, the count will read 0xffff, while we want 46145720Speter * to return zero, so we add and then mask to compensate. 46245720Speter */ 46345720Speter if (low1 >= low2) { 46445720Speter cnt = (low1 + (high1 << 8) + 1) & 0xffff; 46545720Speter } else { 46645720Speter cnt = (low2 + (high2 << 8) + 1) & 0xffff; 46745720Speter } 46845720Speter 46945720Speter if (chan >= 4) /* high channels move words */ 47045720Speter cnt *= 2; 47145720Speter return(cnt); 47245720Speter} 47345720Speter 47445720Speter/* 475141391Sphk * Reached terminal count yet ? 476141391Sphk */ 477141391Sphkint 478141391Sphkisa_dmatc(int chan) 479141391Sphk{ 480141391Sphk 481141391Sphk if (chan < 4) 482141391Sphk return(inb(DMA1_STATUS) & (1 << chan)); 483141391Sphk else 484141391Sphk return(inb(DMA2_STATUS) & (1 << (chan & 3))); 485141391Sphk} 486141391Sphk 487141391Sphk/* 48845720Speter * Stop a DMA transfer currently in progress. 48945720Speter */ 49045720Speterint 49145720Speterisa_dmastop(int chan) 49245720Speter{ 49345720Speter if ((dma_inuse & (1 << chan)) == 0) 49445720Speter printf("isa_dmastop: channel %d not acquired\n", chan); 49545720Speter 49645720Speter if (((dma_busy & (1 << chan)) == 0) && 49745720Speter ((dma_auto_mode & (1 << chan)) == 0)) { 49845720Speter printf("chan %d not busy\n", chan); 49945720Speter return -2 ; 50045720Speter } 50145720Speter 50245720Speter if ((chan & 4) == 0) { 50345720Speter outb(DMA1_SMSK, (chan & 3) | 4 /* disable mask */); 50445720Speter } else { 50545720Speter outb(DMA2_SMSK, (chan & 3) | 4 /* disable mask */); 50645720Speter } 50745720Speter return(isa_dmastatus(chan)); 50845720Speter} 50961994Smsmith 51061994Smsmith/* 51161994Smsmith * Attach to the ISA PnP descriptor for the AT DMA controller 51261994Smsmith */ 51361994Smsmithstatic struct isa_pnp_id atdma_ids[] = { 51461994Smsmith { 0x0002d041 /* PNP0200 */, "AT DMA controller" }, 51561994Smsmith { 0 } 51661994Smsmith}; 51761994Smsmith 51861994Smsmithstatic int 51961994Smsmithatdma_probe(device_t dev) 52061994Smsmith{ 52161994Smsmith int result; 52261994Smsmith 52361994Smsmith if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, atdma_ids)) <= 0) 52461994Smsmith device_quiet(dev); 52561994Smsmith return(result); 52661994Smsmith} 52761994Smsmith 52861994Smsmithstatic int 52961994Smsmithatdma_attach(device_t dev) 53061994Smsmith{ 53161994Smsmith return(0); 53261994Smsmith} 53361994Smsmith 53461994Smsmithstatic device_method_t atdma_methods[] = { 53561994Smsmith /* Device interface */ 53661994Smsmith DEVMETHOD(device_probe, atdma_probe), 53761994Smsmith DEVMETHOD(device_attach, atdma_attach), 53861994Smsmith DEVMETHOD(device_detach, bus_generic_detach), 53961994Smsmith DEVMETHOD(device_shutdown, bus_generic_shutdown), 54061994Smsmith DEVMETHOD(device_suspend, bus_generic_suspend), 54161994Smsmith DEVMETHOD(device_resume, bus_generic_resume), 54261994Smsmith { 0, 0 } 54361994Smsmith}; 54461994Smsmith 54561994Smsmithstatic driver_t atdma_driver = { 54661994Smsmith "atdma", 54761994Smsmith atdma_methods, 54861994Smsmith 1, /* no softc */ 54961994Smsmith}; 55061994Smsmith 55161994Smsmithstatic devclass_t atdma_devclass; 55261994Smsmith 55361994SmsmithDRIVER_MODULE(atdma, isa, atdma_driver, atdma_devclass, 0, 0); 55482555SmsmithDRIVER_MODULE(atdma, acpi, atdma_driver, atdma_devclass, 0, 0); 555