71e7360ed9
Introduce ATA_CAM kernel option, turning ata(4) controller drivers into cam(4) interface modules. When enabled, this option deprecates all ata(4) peripheral drivers (ad, acd, ...) and interfaces and allows cam(4) drivers (ada, cd, ...) and interfaces to be natively used instead. As side effect of this, ata(4) mode setting code was completely rewritten to make controller API more strict and permit above change. While doing this, SATA revision was separated from PATA mode. It allows DMA-incapable SATA devices to operate and makes hw.ata.(ata|atapi)_dma tunable work again. Also allow ata(4) controller drivers (except some specific or broken ones) to handle larger data transfers. Previous constraint of 64K was artificial and is not really required by PCI ATA BM specification or hardware. Submitted by: nwitehorn (powerpc part)
254 lines
6.8 KiB
C
254 lines
6.8 KiB
C
/*-
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* Copyright 2002 by Peter Grehan. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* PSIM local bus ATA controller
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*/
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#include "opt_ata.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <sys/sema.h>
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#include <sys/taskqueue.h>
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#include <machine/stdarg.h>
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#include <vm/uma.h>
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#include <machine/resource.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <sys/ata.h>
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#include <dev/ata/ata-all.h>
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#include <ata_if.h>
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#include <dev/ofw/openfirm.h>
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#include <powerpc/psim/iobusvar.h>
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/*
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* Define the iobus ata bus attachment. This creates a pseudo-bus that
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* the ATA device can be attached to
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*/
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static int ata_iobus_attach(device_t dev);
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static int ata_iobus_probe(device_t dev);
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static int ata_iobus_print_child(device_t dev, device_t child);
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struct resource *ata_iobus_alloc_resource(device_t, device_t, int, int *,
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u_long, u_long, u_long, u_int);
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static int ata_iobus_release_resource(device_t, device_t, int, int,
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struct resource *);
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static device_method_t ata_iobus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ata_iobus_probe),
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DEVMETHOD(device_attach, ata_iobus_attach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus methods */
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DEVMETHOD(bus_print_child, ata_iobus_print_child),
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DEVMETHOD(bus_alloc_resource, ata_iobus_alloc_resource),
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DEVMETHOD(bus_release_resource, ata_iobus_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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{ 0, 0 }
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};
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static driver_t ata_iobus_driver = {
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"ataiobus",
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ata_iobus_methods,
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0,
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};
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static devclass_t ata_iobus_devclass;
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DRIVER_MODULE(ataiobus, iobus, ata_iobus_driver, ata_iobus_devclass, 0, 0);
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MODULE_DEPEND(ata, ata, 1, 1, 1);
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static int
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ata_iobus_probe(device_t dev)
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{
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char *type = iobus_get_name(dev);
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if (strncmp(type, "ata", 3) != 0)
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return (ENXIO);
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device_set_desc(dev, "PSIM ATA Controller");
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return (0);
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}
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static int
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ata_iobus_attach(device_t dev)
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{
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/*
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* Add a single child per controller. Should be able
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* to add two
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*/
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device_add_child(dev, "ata", -1);
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return (bus_generic_attach(dev));
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}
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static int
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ata_iobus_print_child(device_t dev, device_t child)
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{
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int retval = 0;
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retval += bus_print_child_header(dev, child);
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/* irq ? */
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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struct resource *
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ata_iobus_alloc_resource(device_t dev, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct resource *res = NULL;
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int myrid;
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u_int *ofw_regs;
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ofw_regs = iobus_get_regs(dev);
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/*
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* The reg array for the PSIM ata device has 6 start/size entries:
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* 0 - unused
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* 1/2/3 - unused
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* 4/5/6 - primary command
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* 7/8/9 - secondary command
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* 10/11/12 - primary control
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* 13/14/15 - secondary control
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* 16/17/18 - primary/secondary dma registers, unimplemented
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*
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* The resource values are calculated from these registers
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*/
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if (type == SYS_RES_IOPORT) {
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switch (*rid) {
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case ATA_IOADDR_RID:
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myrid = 0;
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start = ofw_regs[4];
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end = start + ATA_IOSIZE - 1;
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count = ATA_IOSIZE;
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res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
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SYS_RES_MEMORY, &myrid,
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start, end, count, flags);
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break;
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case ATA_CTLADDR_RID:
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myrid = 0;
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start = ofw_regs[10];
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end = start + ATA_CTLIOSIZE - 1;
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count = ATA_CTLIOSIZE;
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res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
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SYS_RES_MEMORY, &myrid,
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start, end, count, flags);
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break;
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case ATA_BMADDR_RID:
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/* DMA not properly supported by psim */
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break;
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}
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return (res);
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} else if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) {
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/*
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* Pass this on to the parent
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*/
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return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
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SYS_RES_IRQ, rid, 0, ~0, 1, flags));
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} else {
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return (NULL);
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}
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}
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static int
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ata_iobus_release_resource(device_t dev, device_t child, int type, int rid,
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struct resource *r)
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{
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/* no hotplug... */
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return (0);
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}
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/*
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* Define the actual ATA device. This is a sub-bus to the ata-iobus layer
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* to allow the higher layer bus to massage the resource allocation.
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*/
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static int ata_iobus_sub_probe(device_t dev);
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static int ata_iobus_sub_setmode(device_t dev, int target, int mode);
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static device_method_t ata_iobus_sub_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ata_iobus_sub_probe),
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DEVMETHOD(device_attach, ata_attach),
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DEVMETHOD(device_detach, ata_detach),
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DEVMETHOD(device_resume, ata_resume),
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/* ATA interface */
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DEVMETHOD(ata_setmode, ata_iobus_sub_setmode),
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{ 0, 0 }
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};
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static driver_t ata_iobus_sub_driver = {
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"ata",
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ata_iobus_sub_methods,
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sizeof(struct ata_channel),
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};
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DRIVER_MODULE(ata, ataiobus, ata_iobus_sub_driver, ata_devclass, 0, 0);
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static int
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ata_iobus_sub_probe(device_t dev)
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{
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struct ata_channel *ch = device_get_softc(dev);
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/* Only a single unit per controller thus far */
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ch->unit = 0;
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ch->flags = (ATA_USE_16BIT|ATA_NO_SLAVE);
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ata_generic_hw(dev);
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return ata_probe(dev);
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}
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static int
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ata_iobus_sub_setmode(device_t parent, int target, int mode)
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{
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/* Only ever PIO mode here... */
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return (ATA_PIO);
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}
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