ata-cypress.c revision 331722 
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: stable/11/sys/dev/ata/chipsets/ata-cypress.c 331722 2018-03-29 02:50:57Z eadler $");
29
30#include <sys/param.h>
31#include <sys/module.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/ata.h>
35#include <sys/bus.h>
36#include <sys/endian.h>
37#include <sys/malloc.h>
38#include <sys/lock.h>
39#include <sys/mutex.h>
40#include <sys/sema.h>
41#include <sys/taskqueue.h>
42#include <vm/uma.h>
43#include <machine/stdarg.h>
44#include <machine/resource.h>
45#include <machine/bus.h>
46#include <sys/rman.h>
47#include <dev/pci/pcivar.h>
48#include <dev/pci/pcireg.h>
49#include <dev/ata/ata-all.h>
50#include <dev/ata/ata-pci.h>
51#include <ata_if.h>
52
53/* local prototypes */
54static int ata_cypress_chipinit(device_t dev);
55static int ata_cypress_setmode(device_t dev, int target, int mode);
56
57
58/*
59 * Cypress chipset support functions
60 */
61static int
62ata_cypress_probe(device_t dev)
63{
64    struct ata_pci_controller *ctlr = device_get_softc(dev);
65
66    /*
67     * the Cypress chip is a mess, it contains two ATA functions, but
68     * both channels are visible on the first one.
69     * simply ignore the second function for now, as the right
70     * solution (ignoring the second channel on the first function)
71     * doesn't work with the crappy ATA interrupt setup on the alpha.
72     */
73    if (pci_get_devid(dev) == ATA_CYPRESS_82C693 &&
74	pci_get_function(dev) == 1 &&
75	pci_get_subclass(dev) == PCIS_STORAGE_IDE) {
76	device_set_desc(dev, "Cypress 82C693 ATA controller");
77	ctlr->chipinit = ata_cypress_chipinit;
78	return (BUS_PROBE_LOW_PRIORITY);
79    }
80    return ENXIO;
81}
82
83static int
84ata_cypress_chipinit(device_t dev)
85{
86    struct ata_pci_controller *ctlr = device_get_softc(dev);
87
88    if (ata_setup_interrupt(dev, ata_generic_intr))
89	return ENXIO;
90
91    ctlr->setmode = ata_cypress_setmode;
92    return 0;
93}
94
95static int
96ata_cypress_setmode(device_t dev, int target, int mode)
97{
98	device_t parent = device_get_parent(dev);
99	struct ata_channel *ch = device_get_softc(dev);
100
101	mode = min(mode, ATA_WDMA2);
102
103	/* XXX SOS missing WDMA0+1 + PIO modes */
104	if (mode == ATA_WDMA2) {
105		pci_write_config(parent, ch->unit ? 0x4e : 0x4c, 0x2020, 2);
106	}
107	/* we could set PIO mode timings, but we assume the BIOS did that */
108	return (mode);
109}
110
111ATA_DECLARE_DRIVER(ata_cypress);
112