| isa_dma.c (57973) | isa_dma.c (61994) |
|---|---|
| 1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 | 1/*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)isa.c 7.2 (Berkeley) 5/13/91 |
| 37 * $FreeBSD: head/sys/i386/isa/isa_dma.c 57973 2000-03-13 10:19:32Z phk $ | 37 * $FreeBSD: head/sys/i386/isa/isa_dma.c 61994 2000-06-23 07:44:33Z msmith $ |
| 38 */ 39 40/* 41 * code to manage AT bus 42 * 43 * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44 * Fixed uninitialized variable problem and added code to deal 45 * with DMA page boundaries in isa_dmarangecheck(). Fixed word 46 * mode DMA count compution and reorganized DMA setup code in 47 * isa_dmastart() 48 */ 49 50#include <sys/param.h> 51#include <sys/systm.h> | 38 */ 39 40/* 41 * code to manage AT bus 42 * 43 * 92/08/18 Frank P. MacLachlan (fpm@crash.cts.com): 44 * Fixed uninitialized variable problem and added code to deal 45 * with DMA page boundaries in isa_dmarangecheck(). Fixed word 46 * mode DMA count compution and reorganized DMA setup code in 47 * isa_dmastart() 48 */ 49 50#include <sys/param.h> 51#include <sys/systm.h> |
| 52#include <sys/bus.h> 53#include <sys/kernel.h> |
|
| 52#include <sys/malloc.h> | 54#include <sys/malloc.h> |
| 55#include <sys/module.h> |
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| 53#include <vm/vm.h> 54#include <vm/vm_param.h> 55#include <vm/pmap.h> 56#include <i386/isa/isa.h> | 56#include <vm/vm.h> 57#include <vm/vm_param.h> 58#include <vm/pmap.h> 59#include <i386/isa/isa.h> |
| 57#include <i386/isa/isa_dma.h> | |
| 58#include <i386/isa/ic/i8237.h> | 60#include <i386/isa/ic/i8237.h> |
| 61#include <isa/isavar.h> |
|
| 59 60/* 61** Register definitions for DMA controller 1 (channels 0..3): 62*/ 63#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 64#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 65#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 66#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ --- 422 unchanged lines hidden (view full) --- 489 490 if ((chan & 4) == 0) { 491 outb(DMA1_SMSK, (chan & 3) | 4 /* disable mask */); 492 } else { 493 outb(DMA2_SMSK, (chan & 3) | 4 /* disable mask */); 494 } 495 return(isa_dmastatus(chan)); 496} | 62 63/* 64** Register definitions for DMA controller 1 (channels 0..3): 65*/ 66#define DMA1_CHN(c) (IO_DMA1 + 1*(2*(c))) /* addr reg for channel c */ 67#define DMA1_SMSK (IO_DMA1 + 1*10) /* single mask register */ 68#define DMA1_MODE (IO_DMA1 + 1*11) /* mode register */ 69#define DMA1_FFC (IO_DMA1 + 1*12) /* clear first/last FF */ --- 422 unchanged lines hidden (view full) --- 492 493 if ((chan & 4) == 0) { 494 outb(DMA1_SMSK, (chan & 3) | 4 /* disable mask */); 495 } else { 496 outb(DMA2_SMSK, (chan & 3) | 4 /* disable mask */); 497 } 498 return(isa_dmastatus(chan)); 499} |
| 500 501/* 502 * Attach to the ISA PnP descriptor for the AT DMA controller 503 */ 504static struct isa_pnp_id atdma_ids[] = { 505 { 0x0002d041 /* PNP0200 */, "AT DMA controller" }, 506 { 0 } 507}; 508 509static int 510atdma_probe(device_t dev) 511{ 512 int result; 513 514 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, atdma_ids)) <= 0) 515 device_quiet(dev); 516 return(result); 517} 518 519static int 520atdma_attach(device_t dev) 521{ 522 return(0); 523} 524 525static device_method_t atdma_methods[] = { 526 /* Device interface */ 527 DEVMETHOD(device_probe, atdma_probe), 528 DEVMETHOD(device_attach, atdma_attach), 529 DEVMETHOD(device_detach, bus_generic_detach), 530 DEVMETHOD(device_shutdown, bus_generic_shutdown), 531 DEVMETHOD(device_suspend, bus_generic_suspend), 532 DEVMETHOD(device_resume, bus_generic_resume), 533 { 0, 0 } 534}; 535 536static driver_t atdma_driver = { 537 "atdma", 538 atdma_methods, 539 1, /* no softc */ 540}; 541 542static devclass_t atdma_devclass; 543 544DRIVER_MODULE(atdma, isa, atdma_driver, atdma_devclass, 0, 0); |
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