freebsd-dev/sys/dev/stg/tmc18c30_subr.c
John Baldwin a92cf726f8 Lock the scsi_low code and the drivers which use it along with other
related cleanups:
- Require each driver to initalize a mutex in the scsi_low_softc that
  is shared with the scsi_low code.  This mutex is used for CAM SIMs,
  timers, and interrupt handlers.
- Replace the osdep function switch with direct calls to the relevant
  CAM functions and direct manipulation of timers via callout(9).
- Collapse the CAM-specific scsi_low_osdep_interface substructure
  directly into scsi_low_softc.
- Use bus_*() instead of bus_space_*().
- Return BUS_PROBE_DEFAULT from probe routines instead of 0.
- No need to zero softcs.
- Pass 0ul and ~0ul instead of 0 and ~0 to bus_alloc_resource().
- Spell "dettach" as "detach".
- Remove unused 'dvname' variables.
- De-spl().

Tested by:	no one
2014-11-20 20:50:05 +00:00

177 lines
4.4 KiB
C

/*-
* [Ported for FreeBSD]
* Copyright (c) 2000
* Noriaki Mitsunaga, Mitsuru Iwasaki and Takanori Watanabe.
* All rights reserved.
* [NetBSD for NEC PC-98 series]
* Copyright (c) 1996, 1997, 1998
* NetBSD/pc98 porting staff. All rights reserved.
* Copyright (c) 1996, 1997, 1998
* Naofumi HONDA. All rights reserved.
* Copyright (c) 1996, 1997, 1998
* Kouichi Matsuda. 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 of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <cam/scsi/scsi_low.h>
#include <dev/stg/tmc18c30reg.h>
#include <dev/stg/tmc18c30var.h>
#include <dev/stg/tmc18c30.h>
#define STG_HOSTID 7
devclass_t stg_devclass;
int
stg_alloc_resource(device_t dev)
{
struct stg_softc * sc = device_get_softc(dev);
u_long maddr, msize;
int error;
mtx_init(&sc->sc_sclow.sl_lock, "stg", NULL, MTX_DEF);
sc->port_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
&sc->port_rid, RF_ACTIVE);
if (sc->port_res == NULL) {
stg_release_resource(dev);
return(ENOMEM);
}
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
RF_ACTIVE);
if (sc->irq_res == NULL) {
stg_release_resource(dev);
return(ENOMEM);
}
error = bus_get_resource(dev, SYS_RES_MEMORY, 0, &maddr, &msize);
if (error) {
return(0); /* XXX */
}
/* no need to allocate memory if not configured */
if (maddr == 0 || msize == 0) {
return(0);
}
sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid,
RF_ACTIVE);
if (sc->mem_res == NULL) {
stg_release_resource(dev);
return(ENOMEM);
}
return(0);
}
void
stg_release_resource(device_t dev)
{
struct stg_softc *sc = device_get_softc(dev);
if (sc->stg_intrhand)
bus_teardown_intr(dev, sc->irq_res, sc->stg_intrhand);
if (sc->port_res)
bus_release_resource(dev, SYS_RES_IOPORT,
sc->port_rid, sc->port_res);
if (sc->irq_res)
bus_release_resource(dev, SYS_RES_IRQ,
sc->irq_rid, sc->irq_res);
if (sc->mem_res)
bus_release_resource(dev, SYS_RES_MEMORY,
sc->mem_rid, sc->mem_res);
mtx_destroy(&sc->sc_sclow.sl_lock);
}
int
stg_probe(device_t dev)
{
int rv;
struct stg_softc *sc = device_get_softc(dev);
rv = stgprobesubr(sc->port_res,
device_get_flags(dev));
return rv;
}
int
stg_attach(device_t dev)
{
struct stg_softc *sc;
struct scsi_low_softc *slp;
u_int32_t flags = device_get_flags(dev);
sc = device_get_softc(dev);
slp = &sc->sc_sclow;
slp->sl_dev = dev;
slp->sl_hostid = STG_HOSTID;
slp->sl_cfgflags = flags;
stgattachsubr(sc);
return(STGIOSZ);
}
int
stg_detach(device_t dev)
{
struct stg_softc *sc = device_get_softc(dev);
scsi_low_deactivate(&sc->sc_sclow);
scsi_low_detach(&sc->sc_sclow);
stg_release_resource(dev);
return (0);
}
void
stg_intr(void *arg)
{
struct stg_softc *sc;
sc = arg;
SCSI_LOW_LOCK(&sc->sc_sclow);
stgintr(sc);
SCSI_LOW_UNLOCK(&sc->sc_sclow);
}