ata-cypress.c revision 230132 
1/*-
2 * Copyright (c) 1998 - 2008 S��ren Schmidt <sos@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer,
10 *    without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/ata/chipsets/ata-cypress.c 230132 2012-01-15 13:23:18Z uqs $");
29
30#include "opt_ata.h"
31#include <sys/param.h>
32#include <sys/module.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/ata.h>
36#include <sys/bus.h>
37#include <sys/endian.h>
38#include <sys/malloc.h>
39#include <sys/lock.h>
40#include <sys/mutex.h>
41#include <sys/sema.h>
42#include <sys/taskqueue.h>
43#include <vm/uma.h>
44#include <machine/stdarg.h>
45#include <machine/resource.h>
46#include <machine/bus.h>
47#include <sys/rman.h>
48#include <dev/pci/pcivar.h>
49#include <dev/pci/pcireg.h>
50#include <dev/ata/ata-all.h>
51#include <dev/ata/ata-pci.h>
52#include <ata_if.h>
53
54/* local prototypes */
55static int ata_cypress_chipinit(device_t dev);
56static int ata_cypress_setmode(device_t dev, int target, int mode);
57
58
59/*
60 * Cypress chipset support functions
61 */
62static int
63ata_cypress_probe(device_t dev)
64{
65    struct ata_pci_controller *ctlr = device_get_softc(dev);
66
67    /*
68     * the Cypress chip is a mess, it contains two ATA functions, but
69     * both channels are visible on the first one.
70     * simply ignore the second function for now, as the right
71     * solution (ignoring the second channel on the first function)
72     * doesn't work with the crappy ATA interrupt setup on the alpha.
73     */
74    if (pci_get_devid(dev) == ATA_CYPRESS_82C693 &&
75	pci_get_function(dev) == 1 &&
76	pci_get_subclass(dev) == PCIS_STORAGE_IDE) {
77	device_set_desc(dev, "Cypress 82C693 ATA controller");
78	ctlr->chipinit = ata_cypress_chipinit;
79	return (BUS_PROBE_DEFAULT);
80    }
81    return ENXIO;
82}
83
84static int
85ata_cypress_chipinit(device_t dev)
86{
87    struct ata_pci_controller *ctlr = device_get_softc(dev);
88
89    if (ata_setup_interrupt(dev, ata_generic_intr))
90	return ENXIO;
91
92    ctlr->setmode = ata_cypress_setmode;
93    return 0;
94}
95
96static int
97ata_cypress_setmode(device_t dev, int target, int mode)
98{
99	device_t parent = device_get_parent(dev);
100	struct ata_channel *ch = device_get_softc(dev);
101
102	mode = min(mode, ATA_WDMA2);
103
104	/* XXX SOS missing WDMA0+1 + PIO modes */
105	if (mode == ATA_WDMA2) {
106		pci_write_config(parent, ch->unit ? 0x4e : 0x4c, 0x2020, 2);
107	}
108	/* we could set PIO mode timings, but we assume the BIOS did that */
109	return (mode);
110}
111
112ATA_DECLARE_DRIVER(ata_cypress);
113