freebsd-dev/sys/dev/cy/cy_isa.c

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/*-
* cyclades cyclom-y serial driver
* Andrew Herbert <andrew@werple.apana.org.au>, 17 August 1993
*
* Copyright (c) 1993 Andrew Herbert.
* 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.
* 3. The name Andrew Herbert may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ``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 I 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.
*/
/*
* Cyclades Y ISA serial interface driver
*/
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#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
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#include <sys/module.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <isa/isavar.h>
#include <dev/cy/cyreg.h>
#include <dev/cy/cyvar.h>
static int cy_isa_attach(device_t dev);
static int cy_isa_probe(device_t dev);
static device_method_t cy_isa_methods[] = {
/* Device interface. */
DEVMETHOD(device_probe, cy_isa_probe),
DEVMETHOD(device_attach, cy_isa_attach),
{ 0, 0 }
};
static driver_t cy_isa_driver = {
cy_driver_name,
cy_isa_methods,
0,
};
DRIVER_MODULE(cy, isa, cy_isa_driver, cy_devclass, 0, 0);
static int
cy_isa_probe(device_t dev)
{
struct resource *mem_res;
cy_addr iobase;
int mem_rid;
if (isa_get_logicalid(dev) != 0) /* skip PnP probes */
return (ENXIO);
mem_rid = 0;
mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &mem_rid,
0ul, ~0ul, 0ul, RF_ACTIVE);
if (mem_res == NULL) {
device_printf(dev, "ioport resource allocation failed\n");
return (ENXIO);
}
iobase = rman_get_virtual(mem_res);
the second set of changes in a move towards getting devices to be totally dynamic. this is only the devices in i386/isa I'll do more tomorrow. they're completely masked by #ifdef JREMOD at this stage... the eventual aim is that every driver will do a SYSINIT at startup BEFORE the probes, which will effectively link it into the devsw tables etc. If I'd thought about it more I'd have put that in in this set (damn) The ioconf lines generated by config will also end up in the device's own scope as well, so ioconf.c will eventually be gutted the SYSINIT call to the driver will include a phase where the driver links it's ioconf line into a chain of such. when this phase is done then the user can modify them with the boot: -c config menu if he wants, just like now.. config will put the config lines out in the .h file (e.g. in aha.h will be the addresses for the aha driver to look.) as I said this is a very small first step.. the aim of THIS set of edits is to not have to edit conf.c at all when adding a new device.. the tabe will be a simple skeleton.. when this is done, it will allow other changes to be made, all teh time still having a fully working kernel tree, but the logical outcome is the complete REMOVAL of the devsw tables. By the end of this, linked in drivers will be exactly the same as run-time loaded drivers, except they JUST HAPPEN to already be linked and present at startup.. the SYSINIT calls will be the equivalent of the "init" call made to a newly loaded driver in every respect. For this edit, each of the files has the following code inserted into it: obviously, tailored to suit.. ----------------------somewhere at the top: #ifdef JREMOD #include <sys/conf.h> #define CDEV_MAJOR 13 #define BDEV_MAJOR 4 static void sd_devsw_install(); #endif /*JREMOD */ ---------------------somewhere that's run during bootup: EVENTUALLY a SYSINIT #ifdef JREMOD sd_devsw_install(); #endif /*JREMOD*/ -----------------------at the bottom: #ifdef JREMOD struct bdevsw sd_bdevsw = { sdopen, sdclose, sdstrategy, sdioctl, /*4*/ sddump, sdsize, 0 }; struct cdevsw sd_cdevsw = { sdopen, sdclose, rawread, rawwrite, /*13*/ sdioctl, nostop, nullreset, nodevtotty,/* sd */ seltrue, nommap, sdstrategy }; static sd_devsw_installed = 0; static void sd_devsw_install() { dev_t descript; if( ! sd_devsw_installed ) { descript = makedev(CDEV_MAJOR,0); cdevsw_add(&descript,&sd_cdevsw,NULL); #if defined(BDEV_MAJOR) descript = makedev(BDEV_MAJOR,0); bdevsw_add(&descript,&sd_bdevsw,NULL); #endif /*BDEV_MAJOR*/ sd_devsw_installed = 1; } } #endif /* JREMOD */
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/* Cyclom-16Y hardware reset (Cyclom-8Ys don't care) */
cy_inb(iobase, CY16_RESET, 0); /* XXX? */
DELAY(500); /* wait for the board to get its act together */
/* this is needed to get the board out of reset */
cy_outb(iobase, CY_CLEAR_INTR, 0, 0);
DELAY(500);
bus_release_resource(dev, SYS_RES_MEMORY, mem_rid, mem_res);
return (cy_units(iobase, 0) == 0 ? ENXIO : 0);
}
static int
cy_isa_attach(device_t dev)
{
struct resource *irq_res, *mem_res;
void *irq_cookie, *vaddr, *vsc;
int irq_rid, mem_rid;
irq_res = NULL;
mem_res = NULL;
mem_rid = 0;
mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &mem_rid,
0ul, ~0ul, 0ul, RF_ACTIVE);
if (mem_res == NULL) {
device_printf(dev, "memory resource allocation failed\n");
goto fail;
}
vaddr = rman_get_virtual(mem_res);
vsc = cyattach_common(vaddr, 0);
if (vsc == NULL) {
device_printf(dev, "no ports found!\n");
goto fail;
}
irq_rid = 0;
irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &irq_rid, 0ul, ~0ul, 0ul,
RF_SHAREABLE | RF_ACTIVE);
if (irq_res == NULL) {
device_printf(dev, "interrupt resource allocation failed\n");
goto fail;
}
if (bus_setup_intr(dev, irq_res, INTR_TYPE_TTY | INTR_FAST, cyintr,
vsc, &irq_cookie) != 0) {
device_printf(dev, "interrupt setup failed\n");
goto fail;
}
return (0);
fail:
if (irq_res != NULL)
bus_release_resource(dev, SYS_RES_IRQ, irq_rid, irq_res);
if (mem_res != NULL)
bus_release_resource(dev, SYS_RES_MEMORY, mem_rid, mem_res);
return (ENXIO);
}