066f913a94
Introduce ATA_CAM kernel option, turning ata(4) controller drivers into cam(4) interface modules. When enabled, this options 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.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)
113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/*-
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* Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
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* 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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* without modification, immediately at the beginning of the file.
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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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*
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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, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ata.h"
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#include <sys/param.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/ata.h>
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#include <sys/bus.h>
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#include <sys/endian.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sema.h>
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#include <sys/taskqueue.h>
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#include <vm/uma.h>
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#include <machine/stdarg.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 <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/ata/ata-all.h>
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#include <dev/ata/ata-pci.h>
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#include <ata_if.h>
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/* local prototypes */
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static int ata_cypress_chipinit(device_t dev);
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static int ata_cypress_setmode(device_t dev, int target, int mode);
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/*
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* Cypress chipset support functions
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*/
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static int
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ata_cypress_probe(device_t dev)
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{
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struct ata_pci_controller *ctlr = device_get_softc(dev);
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/*
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* the Cypress chip is a mess, it contains two ATA functions, but
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* both channels are visible on the first one.
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* simply ignore the second function for now, as the right
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* solution (ignoring the second channel on the first function)
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* doesn't work with the crappy ATA interrupt setup on the alpha.
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*/
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if (pci_get_devid(dev) == ATA_CYPRESS_82C693 &&
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pci_get_function(dev) == 1 &&
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pci_get_subclass(dev) == PCIS_STORAGE_IDE) {
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device_set_desc(dev, "Cypress 82C693 ATA controller");
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ctlr->chipinit = ata_cypress_chipinit;
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return (BUS_PROBE_DEFAULT);
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}
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return ENXIO;
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}
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static int
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ata_cypress_chipinit(device_t dev)
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{
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struct ata_pci_controller *ctlr = device_get_softc(dev);
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if (ata_setup_interrupt(dev, ata_generic_intr))
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return ENXIO;
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ctlr->setmode = ata_cypress_setmode;
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return 0;
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}
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static int
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ata_cypress_setmode(device_t dev, int target, int mode)
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{
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device_t parent = device_get_parent(dev);
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struct ata_channel *ch = device_get_softc(dev);
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mode = min(mode, ATA_WDMA2);
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/* XXX SOS missing WDMA0+1 + PIO modes */
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if (mode == ATA_WDMA2) {
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pci_write_config(parent, ch->unit ? 0x4e : 0x4c, 0x2020, 2);
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}
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/* we could set PIO mode timings, but we assume the BIOS did that */
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return (mode);
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}
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ATA_DECLARE_DRIVER(ata_cypress);
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