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 <sys/cdefs.h>
35 #include <dev/aic7xxx/aic7xxx_osm.h>
36
37 static int ahc_pci_probe(device_t dev);
38 static int ahc_pci_attach(device_t dev);
39
40 static device_method_t ahc_pci_device_methods[] = {
41 /* Device interface */
42 DEVMETHOD(device_probe, ahc_pci_probe),
43 DEVMETHOD(device_attach, ahc_pci_attach),
44 DEVMETHOD(device_detach, ahc_detach),
45 { 0, 0 }
46 };
47
48 static driver_t ahc_pci_driver = {
49 "ahc",
50 ahc_pci_device_methods,
51 sizeof(struct ahc_softc)
52 };
53
54 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, 0, 0);
55 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
56 MODULE_VERSION(ahc_pci, 1);
57
58 static int
ahc_pci_probe(device_t dev)59 ahc_pci_probe(device_t dev)
60 {
61 struct ahc_pci_identity *entry;
62
63 entry = ahc_find_pci_device(dev);
64 if (entry != NULL) {
65 device_set_desc(dev, entry->name);
66 return (BUS_PROBE_DEFAULT);
67 }
68 return (ENXIO);
69 }
70
71 static int
ahc_pci_attach(device_t dev)72 ahc_pci_attach(device_t dev)
73 {
74 struct ahc_pci_identity *entry;
75 struct ahc_softc *ahc;
76 char *name;
77 int error;
78
79 entry = ahc_find_pci_device(dev);
80 if (entry == NULL)
81 return (ENXIO);
82
83 /*
84 * Allocate a softc for this card and
85 * set it up for attachment by our
86 * common detect routine.
87 */
88 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
89 if (name == NULL)
90 return (ENOMEM);
91 strcpy(name, device_get_nameunit(dev));
92 ahc = ahc_alloc(dev, name);
93 if (ahc == NULL)
94 return (ENOMEM);
95
96 ahc_set_unit(ahc, device_get_unit(dev));
97
98 /*
99 * Should we bother disabling 39Bit addressing
100 * based on installed memory?
101 */
102 if (sizeof(bus_addr_t) > 4)
103 ahc->flags |= AHC_39BIT_ADDRESSING;
104
105 /* Allocate a dmatag for our SCB DMA maps */
106 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
107 /*alignment*/1, /*boundary*/0,
108 (ahc->flags & AHC_39BIT_ADDRESSING)
109 ? 0x7FFFFFFFFFLL
110 : BUS_SPACE_MAXADDR_32BIT,
111 /*highaddr*/BUS_SPACE_MAXADDR,
112 /*filter*/NULL, /*filterarg*/NULL,
113 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
114 /*nsegments*/AHC_NSEG,
115 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
116 /*flags*/0,
117 &ahc->parent_dmat);
118
119 if (error != 0) {
120 printf("ahc_pci_attach: Could not allocate DMA tag "
121 "- error %d\n", error);
122 ahc_free(ahc);
123 return (ENOMEM);
124 }
125 ahc->dev_softc = dev;
126 error = ahc_pci_config(ahc, entry);
127 if (error != 0) {
128 ahc_free(ahc);
129 return (error);
130 }
131
132 ahc_attach(ahc);
133 return (0);
134 }
135
136 int
ahc_pci_map_registers(struct ahc_softc * ahc)137 ahc_pci_map_registers(struct ahc_softc *ahc)
138 {
139 struct resource *regs;
140 int regs_type;
141 int regs_id;
142 int allow_memio;
143
144 regs = NULL;
145 regs_type = 0;
146 regs_id = 0;
147
148 /* Retrieve the per-device 'allow_memio' hint */
149 if (resource_int_value(device_get_name(ahc->dev_softc),
150 device_get_unit(ahc->dev_softc),
151 "allow_memio", &allow_memio) != 0) {
152 if (bootverbose)
153 device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
154 #ifdef AHC_ALLOW_MEMIO
155 if (bootverbose)
156 printf("on\n");
157 allow_memio = 1;
158 #else
159 if (bootverbose)
160 printf("off\n");
161 allow_memio = 0;
162 #endif
163 }
164
165 if (allow_memio != 0) {
166 regs_type = SYS_RES_MEMORY;
167 regs_id = AHC_PCI_MEMADDR;
168 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
169 ®s_id, RF_ACTIVE);
170 if (regs != NULL) {
171 ahc->tag = rman_get_bustag(regs);
172 ahc->bsh = rman_get_bushandle(regs);
173
174 /*
175 * Do a quick test to see if memory mapped
176 * I/O is functioning correctly.
177 */
178 if (ahc_pci_test_register_access(ahc) != 0) {
179 device_printf(ahc->dev_softc,
180 "PCI Device %d:%d:%d failed memory "
181 "mapped test. Using PIO.\n",
182 aic_get_pci_bus(ahc->dev_softc),
183 aic_get_pci_slot(ahc->dev_softc),
184 aic_get_pci_function(ahc->dev_softc));
185 bus_release_resource(ahc->dev_softc, regs_type,
186 regs_id, regs);
187 regs = NULL;
188 }
189 }
190 }
191
192 if (regs == NULL) {
193 regs_type = SYS_RES_IOPORT;
194 regs_id = AHC_PCI_IOADDR;
195 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
196 ®s_id, RF_ACTIVE);
197 if (regs != NULL) {
198 ahc->tag = rman_get_bustag(regs);
199 ahc->bsh = rman_get_bushandle(regs);
200 if (ahc_pci_test_register_access(ahc) != 0) {
201 device_printf(ahc->dev_softc,
202 "PCI Device %d:%d:%d failed I/O "
203 "mapped test.\n",
204 aic_get_pci_bus(ahc->dev_softc),
205 aic_get_pci_slot(ahc->dev_softc),
206 aic_get_pci_function(ahc->dev_softc));
207 bus_release_resource(ahc->dev_softc, regs_type,
208 regs_id, regs);
209 regs = NULL;
210 }
211 }
212 }
213 if (regs == NULL) {
214 device_printf(ahc->dev_softc,
215 "can't allocate register resources\n");
216 return (ENOMEM);
217 }
218 ahc->platform_data->regs_res_type = regs_type;
219 ahc->platform_data->regs_res_id = regs_id;
220 ahc->platform_data->regs = regs;
221 return (0);
222 }
223