749e4957d9
uses the i8237 without trying to emulate the PC architecture move the register definitions for the i8237 chip into the central include file for the chip, except for the PC98 case which is magic. Add new isa_dmatc() function which tells us as cheaply as possible if the terminal count has been reached for a given channel.
196 lines
5.6 KiB
C
196 lines
5.6 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _ISA_ISAVAR_H_
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#define _ISA_ISAVAR_H_
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struct isa_config;
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struct isa_pnp_id;
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typedef void isa_config_cb(void *arg, struct isa_config *config, int enable);
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#include "isa_if.h"
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#include <isa/pnpvar.h>
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#ifdef _KERNEL
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/*
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* ISA devices are partially ordered. This is to ensure that hardwired
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* devices the BIOS tells us are there appear first, then speculative
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* devices that are sensitive to the probe order, then devices that
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* are hinted to be there, then the most flexible devices which support
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* the ISA bus PNP standard.
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*/
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#define ISA_ORDER_PNPBIOS 10 /* plug-and-play BIOS inflexible hardware */
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#define ISA_ORDER_SENSITIVE 20 /* legacy sensitive hardware */
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#define ISA_ORDER_SPECULATIVE 30 /* legacy non-sensitive hardware */
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#define ISA_ORDER_PNP 40 /* plug-and-play hardware */
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/*
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* Limits on resources that we can manage
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*/
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#define ISA_NPORT 50
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#define ISA_NMEM 50
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#define ISA_NIRQ 50
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#define ISA_NDRQ 50
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/*
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* Limits on resources the hardware can actually handle
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*/
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#define ISA_PNP_NPORT 8
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#define ISA_PNP_NMEM 4
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#define ISA_PNP_NIRQ 2
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#define ISA_PNP_NDRQ 2
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#define ISADMA_READ 0x00100000
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#define ISADMA_WRITE 0
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#define ISADMA_RAW 0x00080000
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/*
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* Plug and play cards can support a range of resource
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* configurations. This structure is used by the isapnp parser to
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* inform the isa bus about the resource possibilities of the
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* device. Each different alternative should be supplied by calling
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* ISA_ADD_CONFIG().
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*/
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struct isa_range {
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u_int32_t ir_start;
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u_int32_t ir_end;
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u_int32_t ir_size;
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u_int32_t ir_align;
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};
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struct isa_config {
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struct isa_range ic_mem[ISA_NMEM];
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struct isa_range ic_port[ISA_NPORT];
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u_int32_t ic_irqmask[ISA_NIRQ];
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u_int32_t ic_drqmask[ISA_NDRQ];
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int ic_nmem;
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int ic_nport;
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int ic_nirq;
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int ic_ndrq;
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};
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/*
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* Used to build lists of IDs and description strings for PnP drivers.
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*/
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struct isa_pnp_id {
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u_int32_t ip_id;
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const char *ip_desc;
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};
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enum isa_device_ivars {
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ISA_IVAR_PORT,
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ISA_IVAR_PORT_0 = ISA_IVAR_PORT,
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ISA_IVAR_PORT_1,
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ISA_IVAR_PORTSIZE,
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ISA_IVAR_PORTSIZE_0 = ISA_IVAR_PORTSIZE,
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ISA_IVAR_PORTSIZE_1,
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ISA_IVAR_MADDR,
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ISA_IVAR_MADDR_0 = ISA_IVAR_MADDR,
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ISA_IVAR_MADDR_1,
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ISA_IVAR_MEMSIZE,
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ISA_IVAR_MEMSIZE_0 = ISA_IVAR_MEMSIZE,
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ISA_IVAR_MEMSIZE_1,
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ISA_IVAR_IRQ,
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ISA_IVAR_IRQ_0 = ISA_IVAR_IRQ,
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ISA_IVAR_IRQ_1,
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ISA_IVAR_DRQ,
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ISA_IVAR_DRQ_0 = ISA_IVAR_DRQ,
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ISA_IVAR_DRQ_1,
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ISA_IVAR_VENDORID,
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ISA_IVAR_SERIAL,
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ISA_IVAR_LOGICALID,
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ISA_IVAR_COMPATID,
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ISA_IVAR_CONFIGATTR
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};
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/*
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* ISA_IVAR_CONFIGATTR bits
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*/
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#define ISACFGATTR_CANDISABLE (1 << 0) /* can be disabled */
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#define ISACFGATTR_DYNAMIC (1 << 1) /* dynamic configuration */
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#define ISACFGATTR_MULTI (1 << 2) /* multiple configurations */
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/*
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* Simplified accessors for isa devices
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*/
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#define ISA_ACCESSOR(var, ivar, type) \
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__BUS_ACCESSOR(isa, var, ISA, ivar, type)
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ISA_ACCESSOR(port, PORT, int)
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ISA_ACCESSOR(portsize, PORTSIZE, int)
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ISA_ACCESSOR(irq, IRQ, int)
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ISA_ACCESSOR(drq, DRQ, int)
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ISA_ACCESSOR(maddr, MADDR, int)
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ISA_ACCESSOR(msize, MEMSIZE, int)
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ISA_ACCESSOR(vendorid, VENDORID, int)
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ISA_ACCESSOR(serial, SERIAL, int)
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ISA_ACCESSOR(logicalid, LOGICALID, int)
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ISA_ACCESSOR(compatid, COMPATID, int)
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ISA_ACCESSOR(configattr, CONFIGATTR, int)
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/* Device class for ISA bridges. */
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extern devclass_t isab_devclass;
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extern intrmask_t isa_irq_pending(void);
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extern void isa_probe_children(device_t dev);
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void isa_dmacascade(int chan);
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void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan);
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int isa_dma_init(int chan, u_int bouncebufsize, int flag);
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void isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan);
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int isa_dma_acquire(int chan);
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void isa_dma_release(int chan);
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int isa_dmastatus(int chan);
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int isa_dmastop(int chan);
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int isa_dmatc(int chan);
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#define isa_dmainit(chan, size) do { \
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if (isa_dma_init(chan, size, M_NOWAIT)) \
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printf("WARNING: isa_dma_init(%d, %ju) failed\n", \
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(int)(chan), (uintmax_t)(size)); \
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} while (0)
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int isab_attach(device_t dev);
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#ifdef PC98
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#include <machine/bus.h>
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/*
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* Allocate discontinuous resources for ISA bus.
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*/
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struct resource *
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isa_alloc_resourcev(device_t child, int type, int *rid,
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bus_addr_t *res, bus_size_t count, u_int flags);
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int
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isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count);
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#endif
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#endif /* _KERNEL */
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#endif /* !_ISA_ISAVAR_H_ */
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