ata-amd.c revision 200171 
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-amd.c 200171 2009-12-06 00:10:13Z mav $");
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_amd_chipinit(device_t dev);
56static int ata_amd_setmode(device_t dev, int target, int mode);
57
58/* misc defines */
59#define AMD_BUG		0x01
60#define AMD_CABLE	0x02
61
62
63/*
64 * American Micro Devices (AMD) chipset support functions
65 */
66static int
67ata_amd_probe(device_t dev)
68{
69    struct ata_pci_controller *ctlr = device_get_softc(dev);
70    static struct ata_chip_id ids[] =
71    {{ ATA_AMD756,  0x00, 0x00,              0, ATA_UDMA4, "756" },
72     { ATA_AMD766,  0x00, AMD_CABLE|AMD_BUG, 0, ATA_UDMA5, "766" },
73     { ATA_AMD768,  0x00, AMD_CABLE,         0, ATA_UDMA5, "768" },
74     { ATA_AMD8111, 0x00, AMD_CABLE,         0, ATA_UDMA6, "8111" },
75     { ATA_AMD5536, 0x00, 0x00,              0, ATA_UDMA5, "CS5536" },
76     { 0, 0, 0, 0, 0, 0}};
77
78    if (pci_get_vendor(dev) != ATA_AMD_ID)
79	return ENXIO;
80
81    if (!(ctlr->chip = ata_match_chip(dev, ids)))
82	return ENXIO;
83
84    ata_set_desc(dev);
85    ctlr->chipinit = ata_amd_chipinit;
86    return (BUS_PROBE_DEFAULT);
87}
88
89static int
90ata_amd_chipinit(device_t dev)
91{
92    struct ata_pci_controller *ctlr = device_get_softc(dev);
93
94    if (ata_setup_interrupt(dev, ata_generic_intr))
95	return ENXIO;
96
97    /* disable/set prefetch, postwrite */
98    if (ctlr->chip->cfg1 & AMD_BUG)
99	pci_write_config(dev, 0x41, pci_read_config(dev, 0x41, 1) & 0x0f, 1);
100    else
101	pci_write_config(dev, 0x41, pci_read_config(dev, 0x41, 1) | 0xf0, 1);
102
103    ctlr->setmode = ata_amd_setmode;
104    return 0;
105}
106
107static int
108ata_amd_setmode(device_t dev, int target, int mode)
109{
110	device_t parent = device_get_parent(dev);
111	struct ata_pci_controller *ctlr = device_get_softc(parent);
112	struct ata_channel *ch = device_get_softc(dev);
113        int devno = (ch->unit << 1) + target;
114	int piomode;
115	u_int8_t timings[] = { 0xa8, 0x65, 0x42, 0x22, 0x20, 0xa8, 0x22, 0x20 };
116	int modes[7] = { 0xc2, 0xc1, 0xc0, 0xc4, 0xc5, 0xc6, 0xc7 };
117	int reg = 0x53 - devno;
118
119	mode = min(mode, ctlr->chip->max_dma);
120	if (ctlr->chip->cfg1 & AMD_CABLE) {
121		if (mode > ATA_UDMA2 &&
122		    !(pci_read_config(parent, 0x42, 1) & (1 << devno))) {
123			ata_print_cable(dev, "controller");
124			mode = ATA_UDMA2;
125		}
126	}
127	/* Set UDMA timings. */
128	if (mode >= ATA_UDMA0) {
129	    pci_write_config(parent, reg, modes[mode & ATA_MODE_MASK], 1);
130	    piomode = ATA_PIO4;
131	} else {
132	    pci_write_config(parent, reg, 0x8b, 1);
133	    piomode = mode;
134	}
135	/* Set WDMA/PIO timings. */
136	pci_write_config(parent, reg - 0x08, timings[ata_mode2idx(piomode)], 1);
137	return (mode);
138}
139
140ATA_DECLARE_DRIVER(ata_amd);
141