1 /*-
2 * Copyright (c) 2009 Neelkanth Natu
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 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/kernel.h>
29 #include <sys/systm.h>
30 #include <sys/module.h>
31 #include <sys/bus.h>
32 #include <sys/rman.h>
33 #include <sys/lock.h>
34 #include <sys/mutex.h>
35 #include <sys/sema.h>
36 #include <sys/taskqueue.h>
37
38 #include <machine/bus.h>
39
40 #include <vm/uma.h>
41
42 #include <sys/ata.h>
43 #include <dev/ata/ata-all.h>
44
45 #include <machine/resource.h>
46
47 __FBSDID("$FreeBSD$");
48
49 static int
ata_zbbus_probe(device_t dev)50 ata_zbbus_probe(device_t dev)
51 {
52
53 return (ata_probe(dev));
54 }
55
56 static int
ata_zbbus_attach(device_t dev)57 ata_zbbus_attach(device_t dev)
58 {
59 int i, rid, regshift, regoffset;
60 struct ata_channel *ch;
61 struct resource *io;
62
63 ch = device_get_softc(dev);
64
65 if (ch->attached)
66 return (0);
67 ch->attached = 1;
68
69 rid = 0;
70 io = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1, RF_ACTIVE);
71 if (io == NULL)
72 return (ENXIO);
73
74 /*
75 * SWARM needs an address shift of 5 when accessing ATA registers.
76 *
77 * For e.g. an access to register 4 actually needs an address
78 * of (4 << 5) to be output on the generic bus.
79 */
80 regshift = 5;
81 resource_int_value(device_get_name(dev), device_get_unit(dev),
82 "regshift", ®shift);
83 if (regshift && bootverbose)
84 device_printf(dev, "using a register shift of %d\n", regshift);
85
86 regoffset = 0x1F0;
87 resource_int_value(device_get_name(dev), device_get_unit(dev),
88 "regoffset", ®offset);
89 if (regoffset && bootverbose) {
90 device_printf(dev, "using a register offset of 0x%0x\n",
91 regoffset);
92 }
93
94 /* setup the ata register addresses */
95 for (i = ATA_DATA; i <= ATA_COMMAND; ++i) {
96 ch->r_io[i].res = io;
97 ch->r_io[i].offset = (regoffset + i) << regshift;
98 }
99
100 ch->r_io[ATA_CONTROL].res = io;
101 ch->r_io[ATA_CONTROL].offset = (regoffset + ATA_CTLOFFSET) << regshift;
102 ch->r_io[ATA_IDX_ADDR].res = io; /* XXX what is this used for */
103 ata_default_registers(dev);
104
105 /* initialize softc for this channel */
106 ch->unit = 0;
107 ch->flags |= ATA_USE_16BIT;
108 ata_generic_hw(dev);
109
110 return (ata_attach(dev));
111 }
112
113 static int
ata_zbbus_detach(device_t dev)114 ata_zbbus_detach(device_t dev)
115 {
116 int error;
117 struct ata_channel *ch = device_get_softc(dev);
118
119 if (!ch->attached)
120 return (0);
121 ch->attached = 0;
122
123 error = ata_detach(dev);
124
125 bus_release_resource(dev, SYS_RES_MEMORY, 0,
126 ch->r_io[ATA_IDX_ADDR].res);
127
128 return (error);
129 }
130
131 static int
ata_zbbus_suspend(device_t dev)132 ata_zbbus_suspend(device_t dev)
133 {
134 struct ata_channel *ch = device_get_softc(dev);
135
136 if (!ch->attached)
137 return (0);
138
139 return (ata_suspend(dev));
140 }
141
142 static int
ata_zbbus_resume(device_t dev)143 ata_zbbus_resume(device_t dev)
144 {
145 struct ata_channel *ch = device_get_softc(dev);
146
147 if (!ch->attached)
148 return (0);
149
150 return (ata_resume(dev));
151 }
152
153 static device_method_t ata_zbbus_methods[] = {
154 /* device interface */
155 DEVMETHOD(device_probe, ata_zbbus_probe),
156 DEVMETHOD(device_attach, ata_zbbus_attach),
157 DEVMETHOD(device_detach, ata_zbbus_detach),
158 DEVMETHOD(device_suspend, ata_zbbus_suspend),
159 DEVMETHOD(device_resume, ata_zbbus_resume),
160
161 { 0, 0 }
162 };
163
164 static driver_t ata_zbbus_driver = {
165 "ata",
166 ata_zbbus_methods,
167 sizeof(struct ata_channel)
168 };
169
170 DRIVER_MODULE(ata, zbbus, ata_zbbus_driver, ata_devclass, 0, 0);
171