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Code Issues Releases Activity
f3856d8fcb
freebsd/sys/isa/isavar.h
John Baldwin 0d484d249f Allow device hints to wire the unit numbers of devices. 
- An "at" hint now reserves a device name.
- A new BUS_HINT_DEVICE_UNIT method is added to the bus interface.  When
  determining the unit number of a device, this method is invoked to
  let the bus driver specify the unit of a device given a specific
  devclass.  This is the only way a device can be given a name reserved
  via an "at" hint.
- Implement BUS_HINT_DEVICE_UNIT() for the acpi(4) and isa(4) bus drivers.
  Both of these busses implement this by comparing the resources for a
  given hint device with the resources enumerated by ACPI/PnPBIOS and
  wire a unit if the hint resources are a subset of the "real" resources.
- Use bus_hinted_children() for adding hinted devices on isa(4) busses
  now instead of doing it by hand.
- Remove the unit kludging from sio(4) as it is no longer necessary.

Prodding from:	peter, imp
OK'd by:	marcel
MFC after:	1 month
2008-11-18 21:01:54 +00:00

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/*-
* Copyright (c) 1998 Doug Rabson
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#ifndef _ISA_ISAVAR_H_
#define _ISA_ISAVAR_H_
struct isa_config;
struct isa_pnp_id;
typedef void isa_config_cb(void *arg, struct isa_config *config, int enable);
#include "isa_if.h"
#include <isa/pnpvar.h>
#ifdef _KERNEL
/*
* ISA devices are partially ordered. This is to ensure that hardwired
* devices the BIOS tells us are there appear first, then speculative
* devices that are sensitive to the probe order, then devices that
* are hinted to be there, then the most flexible devices which support
* the ISA bus PNP standard.
*/
#define ISA_ORDER_PNPBIOS 10 /* plug-and-play BIOS inflexible hardware */
#define ISA_ORDER_SENSITIVE 20 /* legacy sensitive hardware */
#define ISA_ORDER_SPECULATIVE 30 /* legacy non-sensitive hardware */
#define ISA_ORDER_PNP 40 /* plug-and-play flexible hardware */
/*
* Limits on resources that we can manage
*/
#define ISA_NPORT 50
#define ISA_NMEM 50
#define ISA_NIRQ 50
#define ISA_NDRQ 50
/*
* Limits on resources the hardware can actually handle
*/
#define ISA_PNP_NPORT 8
#define ISA_PNP_NMEM 4
#define ISA_PNP_NIRQ 2
#define ISA_PNP_NDRQ 2
#define ISADMA_READ 0x00100000
#define ISADMA_WRITE 0
#define ISADMA_RAW 0x00080000
/*
* Plug and play cards can support a range of resource
* configurations. This structure is used by the isapnp parser to
* inform the isa bus about the resource possibilities of the
* device. Each different alternative should be supplied by calling
* ISA_ADD_CONFIG().
*/
struct isa_range {
u_int32_t ir_start;
u_int32_t ir_end;
u_int32_t ir_size;
u_int32_t ir_align;
};
struct isa_config {
struct isa_range ic_mem[ISA_NMEM];
struct isa_range ic_port[ISA_NPORT];
u_int32_t ic_irqmask[ISA_NIRQ];
u_int32_t ic_drqmask[ISA_NDRQ];
int ic_nmem;
int ic_nport;
int ic_nirq;
int ic_ndrq;
};
/*
* Used to build lists of IDs and description strings for PnP drivers.
*/
struct isa_pnp_id {
u_int32_t ip_id;
const char *ip_desc;
};
enum isa_device_ivars {
ISA_IVAR_PORT,
ISA_IVAR_PORT_0 = ISA_IVAR_PORT,
ISA_IVAR_PORT_1,
ISA_IVAR_PORTSIZE,
ISA_IVAR_PORTSIZE_0 = ISA_IVAR_PORTSIZE,
ISA_IVAR_PORTSIZE_1,
ISA_IVAR_MADDR,
ISA_IVAR_MADDR_0 = ISA_IVAR_MADDR,
ISA_IVAR_MADDR_1,
ISA_IVAR_MEMSIZE,
ISA_IVAR_MEMSIZE_0 = ISA_IVAR_MEMSIZE,
ISA_IVAR_MEMSIZE_1,
ISA_IVAR_IRQ,
ISA_IVAR_IRQ_0 = ISA_IVAR_IRQ,
ISA_IVAR_IRQ_1,
ISA_IVAR_DRQ,
ISA_IVAR_DRQ_0 = ISA_IVAR_DRQ,
ISA_IVAR_DRQ_1,
ISA_IVAR_VENDORID,
ISA_IVAR_SERIAL,
ISA_IVAR_LOGICALID,
ISA_IVAR_COMPATID,
ISA_IVAR_CONFIGATTR,
ISA_IVAR_PNP_CSN,
ISA_IVAR_PNP_LDN,
ISA_IVAR_PNPBIOS_HANDLE
};
/*
* ISA_IVAR_CONFIGATTR bits
*/
#define ISACFGATTR_CANDISABLE (1 << 0) /* can be disabled */
#define ISACFGATTR_DYNAMIC (1 << 1) /* dynamic configuration */
#define ISACFGATTR_HINTS (1 << 3) /* source of config is hints */
/*
* Simplified accessors for isa devices
*/
#define ISA_ACCESSOR(var, ivar, type) \
__BUS_ACCESSOR(isa, var, ISA, ivar, type)
ISA_ACCESSOR(port, PORT, int)
ISA_ACCESSOR(portsize, PORTSIZE, int)
ISA_ACCESSOR(irq, IRQ, int)
ISA_ACCESSOR(drq, DRQ, int)
ISA_ACCESSOR(maddr, MADDR, int)
ISA_ACCESSOR(msize, MEMSIZE, int)
ISA_ACCESSOR(vendorid, VENDORID, int)
ISA_ACCESSOR(serial, SERIAL, int)
ISA_ACCESSOR(logicalid, LOGICALID, int)
ISA_ACCESSOR(compatid, COMPATID, int)
ISA_ACCESSOR(configattr, CONFIGATTR, int)
ISA_ACCESSOR(pnp_csn, PNP_CSN, int)
ISA_ACCESSOR(pnp_ldn, PNP_LDN, int)
ISA_ACCESSOR(pnpbios_handle, PNPBIOS_HANDLE, int)
/* Device class for ISA bridges. */
extern devclass_t isab_devclass;
extern intrmask_t isa_irq_pending(void);
extern void isa_probe_children(device_t dev);
void isa_dmacascade(int chan);
void isa_dmadone(int flags, caddr_t addr, int nbytes, int chan);
int isa_dma_init(int chan, u_int bouncebufsize, int flag);
void isa_dmastart(int flags, caddr_t addr, u_int nbytes, int chan);
int isa_dma_acquire(int chan);
void isa_dma_release(int chan);
int isa_dmastatus(int chan);
int isa_dmastop(int chan);
int isa_dmatc(int chan);
#define isa_dmainit(chan, size) do { \
if (isa_dma_init(chan, size, M_NOWAIT)) \
printf("WARNING: isa_dma_init(%d, %ju) failed\n", \
(int)(chan), (uintmax_t)(size)); \
} while (0)
void isa_hinted_child(device_t parent, const char *name, int unit);
void isa_hint_device_unit(device_t bus, device_t child, const char *name,
int *unitp);
int isab_attach(device_t dev);
#ifdef PC98
#include <machine/bus.h>
/*
* Allocate discontinuous resources for ISA bus.
*/
struct resource *
isa_alloc_resourcev(device_t child, int type, int *rid,
bus_addr_t *res, bus_size_t count, u_int flags);
int
isa_load_resourcev(struct resource *re, bus_addr_t *res, bus_size_t count);
#endif
#endif /* _KERNEL */
#endif /* !_ISA_ISAVAR_H_ */
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