1 /*-
2 * FreeBSD, PCI product support functions
3 *
4 * Copyright (c) 1995-2001 Justin T. Gibbs
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * Alternatively, this software may be distributed under the terms of the
17 * GNU Public License ("GPL").
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#19 $
32 */
33
34 #include <dev/aic7xxx/aic7xxx_osm.h>
35
36 static int ahc_pci_probe(device_t dev);
37 static int ahc_pci_attach(device_t dev);
38
39 static device_method_t ahc_pci_device_methods[] = {
40 /* Device interface */
41 DEVMETHOD(device_probe, ahc_pci_probe),
42 DEVMETHOD(device_attach, ahc_pci_attach),
43 DEVMETHOD(device_detach, ahc_detach),
44 { 0, 0 }
45 };
46
47 static driver_t ahc_pci_driver = {
48 "ahc",
49 ahc_pci_device_methods,
50 sizeof(struct ahc_softc)
51 };
52
53 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, 0, 0);
54 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
55 MODULE_VERSION(ahc_pci, 1);
56
57 static int
ahc_pci_probe(device_t dev)58 ahc_pci_probe(device_t dev)
59 {
60 struct ahc_pci_identity *entry;
61
62 entry = ahc_find_pci_device(dev);
63 if (entry != NULL) {
64 device_set_desc(dev, entry->name);
65 return (BUS_PROBE_DEFAULT);
66 }
67 return (ENXIO);
68 }
69
70 static int
ahc_pci_attach(device_t dev)71 ahc_pci_attach(device_t dev)
72 {
73 struct ahc_pci_identity *entry;
74 struct ahc_softc *ahc;
75 char *name;
76 int error;
77
78 entry = ahc_find_pci_device(dev);
79 if (entry == NULL)
80 return (ENXIO);
81
82 /*
83 * Allocate a softc for this card and
84 * set it up for attachment by our
85 * common detect routine.
86 */
87 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
88 if (name == NULL)
89 return (ENOMEM);
90 strcpy(name, device_get_nameunit(dev));
91 ahc = ahc_alloc(dev, name);
92 if (ahc == NULL)
93 return (ENOMEM);
94
95 ahc_set_unit(ahc, device_get_unit(dev));
96
97 /*
98 * Should we bother disabling 39Bit addressing
99 * based on installed memory?
100 */
101 if (sizeof(bus_addr_t) > 4)
102 ahc->flags |= AHC_39BIT_ADDRESSING;
103
104 /* Allocate a dmatag for our SCB DMA maps */
105 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
106 /*alignment*/1, /*boundary*/0,
107 (ahc->flags & AHC_39BIT_ADDRESSING)
108 ? 0x7FFFFFFFFFLL
109 : BUS_SPACE_MAXADDR_32BIT,
110 /*highaddr*/BUS_SPACE_MAXADDR,
111 /*filter*/NULL, /*filterarg*/NULL,
112 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
113 /*nsegments*/AHC_NSEG,
114 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
115 /*flags*/0,
116 &ahc->parent_dmat);
117
118 if (error != 0) {
119 printf("ahc_pci_attach: Could not allocate DMA tag "
120 "- error %d\n", error);
121 ahc_free(ahc);
122 return (ENOMEM);
123 }
124 ahc->dev_softc = dev;
125 error = ahc_pci_config(ahc, entry);
126 if (error != 0) {
127 ahc_free(ahc);
128 return (error);
129 }
130
131 ahc_attach(ahc);
132 return (0);
133 }
134
135 int
ahc_pci_map_registers(struct ahc_softc * ahc)136 ahc_pci_map_registers(struct ahc_softc *ahc)
137 {
138 struct resource *regs;
139 int regs_type;
140 int regs_id;
141 int allow_memio = 1;
142
143 regs = NULL;
144 regs_type = 0;
145 regs_id = 0;
146
147 /* Retrieve the per-device 'allow_memio' hint */
148 if (resource_int_value(device_get_name(ahc->dev_softc),
149 device_get_unit(ahc->dev_softc),
150 "allow_memio", &allow_memio) != 0) {
151 if (bootverbose)
152 device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
153 #if defined(AHC_ALLOW_MEMIO) && (AHC_ALLOW_MEMIO == 0)
154 if (bootverbose)
155 printf("off\n");
156 allow_memio = 0;
157 #else
158 if (bootverbose)
159 printf("on\n");
160 allow_memio = 1;
161 #endif
162 }
163
164 if (allow_memio != 0) {
165 regs_type = SYS_RES_MEMORY;
166 regs_id = AHC_PCI_MEMADDR;
167 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
168 ®s_id, RF_ACTIVE);
169 if (regs != NULL) {
170 ahc->tag = rman_get_bustag(regs);
171 ahc->bsh = rman_get_bushandle(regs);
172
173 /*
174 * Do a quick test to see if memory mapped
175 * I/O is functioning correctly.
176 */
177 if (ahc_pci_test_register_access(ahc) != 0) {
178 device_printf(ahc->dev_softc,
179 "PCI Device %d:%d:%d failed memory "
180 "mapped test. Using PIO.\n",
181 aic_get_pci_bus(ahc->dev_softc),
182 aic_get_pci_slot(ahc->dev_softc),
183 aic_get_pci_function(ahc->dev_softc));
184 bus_release_resource(ahc->dev_softc, regs_type,
185 regs_id, regs);
186 regs = NULL;
187 }
188 }
189 }
190
191 if (regs == NULL) {
192 regs_type = SYS_RES_IOPORT;
193 regs_id = AHC_PCI_IOADDR;
194 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
195 ®s_id, RF_ACTIVE);
196 if (regs != NULL) {
197 ahc->tag = rman_get_bustag(regs);
198 ahc->bsh = rman_get_bushandle(regs);
199 if (ahc_pci_test_register_access(ahc) != 0) {
200 device_printf(ahc->dev_softc,
201 "PCI Device %d:%d:%d failed I/O "
202 "mapped test.\n",
203 aic_get_pci_bus(ahc->dev_softc),
204 aic_get_pci_slot(ahc->dev_softc),
205 aic_get_pci_function(ahc->dev_softc));
206 bus_release_resource(ahc->dev_softc, regs_type,
207 regs_id, regs);
208 regs = NULL;
209 }
210 }
211 }
212 if (regs == NULL) {
213 device_printf(ahc->dev_softc,
214 "can't allocate register resources\n");
215 return (ENOMEM);
216 }
217 ahc->platform_data->regs_res_type = regs_type;
218 ahc->platform_data->regs_res_id = regs_id;
219 ahc->platform_data->regs = regs;
220 return (0);
221 }
222