ahci_generic.c revision 291689 
1/*-
2 * Copyright (c) 2009-2012 Alexander Motin <mav@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/ahci/ahci_generic.c 291689 2015-12-03 11:24:11Z andrew $");
29
30#include <sys/param.h>
31#include <sys/module.h>
32#include <sys/systm.h>
33#include <sys/kernel.h>
34#include <sys/bus.h>
35#include <sys/conf.h>
36#include <sys/endian.h>
37#include <sys/malloc.h>
38#include <sys/lock.h>
39#include <sys/mutex.h>
40#include <sys/rman.h>
41
42#include <machine/bus.h>
43#include <machine/resource.h>
44
45#include <dev/ahci/ahci.h>
46
47#include <dev/ofw/ofw_bus.h>
48#include <dev/ofw/ofw_bus_subr.h>
49
50static struct ofw_compat_data compat_data[] = {
51	{"generic-ahci", 	1},
52	{"snps,dwc-ahci",	1},
53	{NULL,			0}
54};
55
56static int
57ahci_gen_ctlr_reset(device_t dev)
58{
59
60	return ahci_ctlr_reset(dev);
61}
62
63static int
64ahci_probe(device_t dev)
65{
66
67	if (!ofw_bus_status_okay(dev))
68		return (ENXIO);
69
70	if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
71		return (ENXIO);
72
73	device_set_desc_copy(dev, "AHCI SATA controller");
74	return (BUS_PROBE_DEFAULT);
75}
76
77static int
78ahci_gen_attach(device_t dev)
79{
80	struct ahci_controller *ctlr = device_get_softc(dev);
81	int	error;
82
83	ctlr->r_rid = 0;
84	ctlr->r_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &ctlr->r_rid,
85	    RF_ACTIVE);
86	if (ctlr->r_mem == NULL)
87		return (ENXIO);
88
89	/* Setup controller defaults. */
90	ctlr->numirqs = 1;
91
92	/* Reset controller */
93	if ((error = ahci_gen_ctlr_reset(dev)) == 0)
94		error = ahci_attach(dev);
95
96	if (error != 0) {
97		if (ctlr->r_mem != NULL)
98			bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid,
99			    ctlr->r_mem);
100	}
101	return error;
102}
103
104static int
105ahci_gen_detach(device_t dev)
106{
107
108	ahci_detach(dev);
109	return (0);
110}
111
112static devclass_t ahci_gen_devclass;
113static device_method_t ahci_methods[] = {
114	DEVMETHOD(device_probe,     ahci_probe),
115	DEVMETHOD(device_attach,    ahci_gen_attach),
116	DEVMETHOD(device_detach,    ahci_gen_detach),
117	DEVMETHOD(bus_print_child,  ahci_print_child),
118	DEVMETHOD(bus_alloc_resource,       ahci_alloc_resource),
119	DEVMETHOD(bus_release_resource,     ahci_release_resource),
120	DEVMETHOD(bus_setup_intr,   ahci_setup_intr),
121	DEVMETHOD(bus_teardown_intr,ahci_teardown_intr),
122	DEVMETHOD(bus_child_location_str, ahci_child_location_str),
123	DEVMETHOD(bus_get_dma_tag,  ahci_get_dma_tag),
124	DEVMETHOD_END
125};
126static driver_t ahci_driver = {
127	"ahci",
128	ahci_methods,
129	sizeof(struct ahci_controller)
130};
131DRIVER_MODULE(ahci, simplebus, ahci_driver, ahci_gen_devclass, NULL, NULL);
132