freebsd-dev/sys/isa/vga_isa.c
Wojciech A. Koszek 9336e0699b Replace explicit calls to video methods with their respective variants
implemented with macros. This patch improves code readability. Reasoning
behind vidd_* is a sort of "video discipline".

List of macros is supposed to be complete--all methods of video_switch
ought to have their respective macros from now on.

Functionally, this code should be no-op. My intention is to leave current
behaviour of touched code as is.

No objections:	rwatson
Silence on:	freebsd-current@
Approved by:	cognet
2007-12-29 23:26:59 +00:00

271 lines
6.6 KiB
C

/*-
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
* 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 as
* the first lines of this file unmodified.
* 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 AUTHORS ``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 AUTHORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_vga.h"
#include "opt_fb.h"
#include "opt_syscons.h" /* should be removed in the future, XXX */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/fbio.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
#ifdef __i386__
#include <machine/pc/bios.h>
#endif
#include <dev/fb/fbreg.h>
#include <dev/fb/vgareg.h>
#include <isa/isareg.h>
#include <isa/isavar.h>
#define VGA_SOFTC(unit) \
((vga_softc_t *)devclass_get_softc(isavga_devclass, unit))
static devclass_t isavga_devclass;
#ifdef FB_INSTALL_CDEV
static d_open_t isavga_open;
static d_close_t isavga_close;
static d_read_t isavga_read;
static d_write_t isavga_write;
static d_ioctl_t isavga_ioctl;
static d_mmap_t isavga_mmap;
static struct cdevsw isavga_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = isavga_open,
.d_close = isavga_close,
.d_read = isavga_read,
.d_write = isavga_write,
.d_ioctl = isavga_ioctl,
.d_mmap = isavga_mmap,
.d_name = VGA_DRIVER_NAME,
};
#endif /* FB_INSTALL_CDEV */
static void
isavga_identify(driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, VGA_DRIVER_NAME, 0);
}
static int
isavga_probe(device_t dev)
{
video_adapter_t adp;
int error;
/* No pnp support */
if (isa_get_vendorid(dev))
return (ENXIO);
device_set_desc(dev, "Generic ISA VGA");
error = vga_probe_unit(device_get_unit(dev), &adp, device_get_flags(dev));
if (error == 0) {
bus_set_resource(dev, SYS_RES_IOPORT, 0,
adp.va_io_base, adp.va_io_size);
bus_set_resource(dev, SYS_RES_MEMORY, 0,
adp.va_mem_base, adp.va_mem_size);
#if 0
isa_set_port(dev, adp.va_io_base);
isa_set_portsize(dev, adp.va_io_size);
isa_set_maddr(dev, adp.va_mem_base);
isa_set_msize(dev, adp.va_mem_size);
#endif
}
return error;
}
static int
isavga_attach(device_t dev)
{
vga_softc_t *sc;
int unit;
int rid;
int error;
unit = device_get_unit(dev);
sc = device_get_softc(dev);
rid = 0;
bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
rid = 0;
bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
error = vga_attach_unit(unit, sc, device_get_flags(dev));
if (error)
return error;
#ifdef FB_INSTALL_CDEV
/* attach a virtual frame buffer device */
error = fb_attach(VGA_MKMINOR(unit), sc->adp, &isavga_cdevsw);
if (error)
return error;
#endif /* FB_INSTALL_CDEV */
if (0 && bootverbose)
vidd_diag(sc->adp, bootverbose);
#if 0 /* experimental */
device_add_child(dev, "fb", -1);
bus_generic_attach(dev);
#endif
return 0;
}
static int
isavga_suspend(device_t dev)
{
vga_softc_t *sc;
int err, nbytes;
sc = device_get_softc(dev);
err = bus_generic_suspend(dev);
if (err)
return (err);
/* Save the video state across the suspend. */
if (sc->state_buf != NULL) {
free(sc->state_buf, M_TEMP);
sc->state_buf = NULL;
}
nbytes = vidd_save_state(sc->adp, NULL, 0);
if (nbytes <= 0)
return (0);
sc->state_buf = malloc(nbytes, M_TEMP, M_NOWAIT | M_ZERO);
if (sc->state_buf == NULL)
return (0);
if (bootverbose)
device_printf(dev, "saving %d bytes of video state\n", nbytes);
if (vidd_save_state(sc->adp, sc->state_buf, nbytes) != 0) {
device_printf(dev, "failed to save state (nbytes=%d)\n",
nbytes);
free(sc->state_buf, M_TEMP);
sc->state_buf = NULL;
}
return (0);
}
static int
isavga_resume(device_t dev)
{
vga_softc_t *sc;
sc = device_get_softc(dev);
if (sc->state_buf != NULL) {
if (vidd_load_state(sc->adp, sc->state_buf) != 0)
device_printf(dev, "failed to reload state\n");
free(sc->state_buf, M_TEMP);
sc->state_buf = NULL;
}
bus_generic_resume(dev);
return 0;
}
#ifdef FB_INSTALL_CDEV
static int
isavga_open(struct cdev *dev, int flag, int mode, struct thread *td)
{
return vga_open(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
}
static int
isavga_close(struct cdev *dev, int flag, int mode, struct thread *td)
{
return vga_close(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
}
static int
isavga_read(struct cdev *dev, struct uio *uio, int flag)
{
return vga_read(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
}
static int
isavga_write(struct cdev *dev, struct uio *uio, int flag)
{
return vga_write(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
}
static int
isavga_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
{
return vga_ioctl(dev, VGA_SOFTC(VGA_UNIT(dev)), cmd, arg, flag, td);
}
static int
isavga_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int prot)
{
return vga_mmap(dev, VGA_SOFTC(VGA_UNIT(dev)), offset, paddr, prot);
}
#endif /* FB_INSTALL_CDEV */
static device_method_t isavga_methods[] = {
DEVMETHOD(device_identify, isavga_identify),
DEVMETHOD(device_probe, isavga_probe),
DEVMETHOD(device_attach, isavga_attach),
DEVMETHOD(device_suspend, isavga_suspend),
DEVMETHOD(device_resume, isavga_resume),
DEVMETHOD(bus_print_child, bus_generic_print_child),
{ 0, 0 }
};
static driver_t isavga_driver = {
VGA_DRIVER_NAME,
isavga_methods,
sizeof(vga_softc_t),
};
DRIVER_MODULE(vga, isa, isavga_driver, isavga_devclass, 0, 0);