d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
1939b590de
freebsd-nq/sys/dev/scc/scc_bfe_macio.c

94 lines
2.8 KiB
C
Raw Normal View History

Add a MacIO bus attachment. The Z8530 as present in the Mac needs a different register shift and is fed by a different clock than we use for UltraSPARC hardware. To deal with this, the regshft and rclk fields in the class structure are removed and bus frontends now pass the right regshft and rclk to the probe function where they're put in the BAS and passed in to subordinate drivers.
2006-04-01 04:51:56 +00:00
/*-
* Copyright (c) 2006 Marcel Moolenaar
* 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 ``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/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <dev/ofw/ofw_bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/scc/scc_bfe.h>
#define MACIO_REGSHFT 4
#define MACIO_RCLK 230400
static int
scc_macio_probe(device_t dev)
{
struct scc_softc *sc;
const char *nm;
sc = device_get_softc(dev);
nm = ofw_bus_get_name(dev);
if (!strcmp(nm, "escc")) {
device_set_desc(dev, "Zilog Z8530 dual channel SCC");
sc->sc_class = &scc_z8530_class;
Pass the RID from the bus frontends to the core probe function. Currently all RIDs are 0, but for PCI devices this typically isn't the case. This change is made with future PCI support in mind.
2007-03-22 23:45:25 +00:00
return (scc_bfe_probe(dev, MACIO_REGSHFT, MACIO_RCLK, 0));
Add a MacIO bus attachment. The Z8530 as present in the Mac needs a different register shift and is fed by a different clock than we use for UltraSPARC hardware. To deal with this, the regshft and rclk fields in the class structure are removed and bus frontends now pass the right regshft and rclk to the probe function where they're put in the BAS and passed in to subordinate drivers.
2006-04-01 04:51:56 +00:00
}
return (ENXIO);
}
With rev 1.24 of sys/powerpc/powermac/macio.c, we now get a total of 6 interrupt resources for scc(4) on macio(4). This is 3 per channel, of which the 1st of each channel is the interrupt associated with the SCC. The other 2 are for DMA operation. Change scc_bfe_attach() to accept an argument that's the number of interrupts per channel (ipc) and change each bus front-end (bfe) to pass that argument through a wrapper for the device_attach method. For now, we only allocate the 1st interrupt of each channel to perserve behaviour.
2008-04-26 18:40:59 +00:00
static int
scc_macio_attach(device_t dev)
{
return (scc_bfe_attach(dev, 3));
}
Add a MacIO bus attachment. The Z8530 as present in the Mac needs a different register shift and is fed by a different clock than we use for UltraSPARC hardware. To deal with this, the regshft and rclk fields in the class structure are removed and bus frontends now pass the right regshft and rclk to the probe function where they're put in the BAS and passed in to subordinate drivers.
2006-04-01 04:51:56 +00:00
static device_method_t scc_macio_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, scc_macio_probe),
With rev 1.24 of sys/powerpc/powermac/macio.c, we now get a total of 6 interrupt resources for scc(4) on macio(4). This is 3 per channel, of which the 1st of each channel is the interrupt associated with the SCC. The other 2 are for DMA operation. Change scc_bfe_attach() to accept an argument that's the number of interrupts per channel (ipc) and change each bus front-end (bfe) to pass that argument through a wrapper for the device_attach method. For now, we only allocate the 1st interrupt of each channel to perserve behaviour.
2008-04-26 18:40:59 +00:00
DEVMETHOD(device_attach, scc_macio_attach),
Add a MacIO bus attachment. The Z8530 as present in the Mac needs a different register shift and is fed by a different clock than we use for UltraSPARC hardware. To deal with this, the regshft and rclk fields in the class structure are removed and bus frontends now pass the right regshft and rclk to the probe function where they're put in the BAS and passed in to subordinate drivers.
2006-04-01 04:51:56 +00:00
DEVMETHOD(device_detach, scc_bfe_detach),
DEVMETHOD(bus_alloc_resource, scc_bus_alloc_resource),
DEVMETHOD(bus_release_resource, scc_bus_release_resource),
DEVMETHOD(bus_get_resource, scc_bus_get_resource),
DEVMETHOD(bus_read_ivar, scc_bus_read_ivar),
DEVMETHOD(bus_setup_intr, scc_bus_setup_intr),
DEVMETHOD(bus_teardown_intr, scc_bus_teardown_intr),
- There's no need to overwrite the default device method with the default one. Interestingly, these are actually the default for quite some time (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9) since r52045) but even recently added device drivers do this unnecessarily. Discussed with: jhb, marcel - While at it, use DEVMETHOD_END. Discussed with: jhb - Also while at it, use __FBSDID.
2011-11-22 21:28:20 +00:00
DEVMETHOD_END
Add a MacIO bus attachment. The Z8530 as present in the Mac needs a different register shift and is fed by a different clock than we use for UltraSPARC hardware. To deal with this, the regshft and rclk fields in the class structure are removed and bus frontends now pass the right regshft and rclk to the probe function where they're put in the BAS and passed in to subordinate drivers.
2006-04-01 04:51:56 +00:00
};
static driver_t scc_macio_driver = {
scc_driver_name,
scc_macio_methods,
sizeof(struct scc_softc),
};
DRIVER_MODULE(scc, macio, scc_macio_driver, scc_devclass, 0, 0);
Reference in New Issue Copy Permalink