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 __FBSDID("$FreeBSD: releng/8.4/sys/dev/aic7xxx/ahc_pci.c 233025 2012-03-16 09:22:59Z scottl $");
36
37 #include <dev/aic7xxx/aic7xxx_osm.h>
38
39 static int ahc_pci_probe(device_t dev);
40 static int ahc_pci_attach(device_t dev);
41
42 static device_method_t ahc_pci_device_methods[] = {
43 /* Device interface */
44 DEVMETHOD(device_probe, ahc_pci_probe),
45 DEVMETHOD(device_attach, ahc_pci_attach),
46 DEVMETHOD(device_detach, ahc_detach),
47 { 0, 0 }
48 };
49
50 static driver_t ahc_pci_driver = {
51 "ahc",
52 ahc_pci_device_methods,
53 sizeof(struct ahc_softc)
54 };
55
56 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0);
57 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
58 MODULE_VERSION(ahc_pci, 1);
59
60 static int
61 ahc_pci_probe(device_t dev)
62 {
63 struct ahc_pci_identity *entry;
64
65 entry = ahc_find_pci_device(dev);
66 if (entry != NULL) {
67 device_set_desc(dev, entry->name);
68 return (BUS_PROBE_DEFAULT);
69 }
70 return (ENXIO);
71 }
72
73 static int
74 ahc_pci_attach(device_t dev)
75 {
76 struct ahc_pci_identity *entry;
77 struct ahc_softc *ahc;
78 char *name;
79 int error;
80
81 entry = ahc_find_pci_device(dev);
82 if (entry == NULL)
83 return (ENXIO);
84
85 /*
86 * Allocate a softc for this card and
87 * set it up for attachment by our
88 * common detect routine.
89 */
90 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
91 if (name == NULL)
92 return (ENOMEM);
93 strcpy(name, device_get_nameunit(dev));
94 ahc = ahc_alloc(dev, name);
95 if (ahc == NULL)
96 return (ENOMEM);
97
98 ahc_set_unit(ahc, device_get_unit(dev));
99
100 /*
101 * Should we bother disabling 39Bit addressing
102 * based on installed memory?
103 */
104 if (sizeof(bus_addr_t) > 4)
105 ahc->flags |= AHC_39BIT_ADDRESSING;
106
107 /* Allocate a dmatag for our SCB DMA maps */
108 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
109 /*alignment*/1, /*boundary*/0,
110 (ahc->flags & AHC_39BIT_ADDRESSING)
111 ? 0x7FFFFFFFFFLL
112 : BUS_SPACE_MAXADDR_32BIT,
113 /*highaddr*/BUS_SPACE_MAXADDR,
114 /*filter*/NULL, /*filterarg*/NULL,
115 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
116 /*nsegments*/AHC_NSEG,
117 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
118 /*flags*/0,
119 &ahc->parent_dmat);
120
121 if (error != 0) {
122 printf("ahc_pci_attach: Could not allocate DMA tag "
123 "- error %d\n", error);
124 ahc_free(ahc);
125 return (ENOMEM);
126 }
127 ahc->dev_softc = dev;
128 error = ahc_pci_config(ahc, entry);
129 if (error != 0) {
130 ahc_free(ahc);
131 return (error);
132 }
133
134 ahc_attach(ahc);
135 return (0);
136 }
137
138 int
139 ahc_pci_map_registers(struct ahc_softc *ahc)
140 {
141 struct resource *regs;
142 u_int command;
143 int regs_type;
144 int regs_id;
145 int allow_memio;
146
147 command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
148 regs = NULL;
149 regs_type = 0;
150 regs_id = 0;
151
152 /* Retrieve the per-device 'allow_memio' hint */
153 if (resource_int_value(device_get_name(ahc->dev_softc),
154 device_get_unit(ahc->dev_softc),
155 "allow_memio", &allow_memio) != 0) {
156 if (bootverbose)
157 device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
158 #ifdef AHC_ALLOW_MEMIO
159 if (bootverbose)
160 printf("on\n");
161 allow_memio = 1;
162 #else
163 if (bootverbose)
164 printf("off\n");
165 allow_memio = 0;
166 #endif
167 }
168
169 if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
170
171 regs_type = SYS_RES_MEMORY;
172 regs_id = AHC_PCI_MEMADDR;
173 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
174 ®s_id, RF_ACTIVE);
175 if (regs != NULL) {
176 ahc->tag = rman_get_bustag(regs);
177 ahc->bsh = rman_get_bushandle(regs);
178
179 /*
180 * Do a quick test to see if memory mapped
181 * I/O is functioning correctly.
182 */
183 if (ahc_pci_test_register_access(ahc) != 0) {
184 device_printf(ahc->dev_softc,
185 "PCI Device %d:%d:%d failed memory "
186 "mapped test. Using PIO.\n",
187 aic_get_pci_bus(ahc->dev_softc),
188 aic_get_pci_slot(ahc->dev_softc),
189 aic_get_pci_function(ahc->dev_softc));
190 bus_release_resource(ahc->dev_softc, regs_type,
191 regs_id, regs);
192 regs = NULL;
193 } else {
194 command &= ~PCIM_CMD_PORTEN;
195 aic_pci_write_config(ahc->dev_softc,
196 PCIR_COMMAND,
197 command, /*bytes*/1);
198 }
199 }
200 }
201
202 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
203 regs_type = SYS_RES_IOPORT;
204 regs_id = AHC_PCI_IOADDR;
205 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
206 ®s_id, RF_ACTIVE);
207 if (regs != NULL) {
208 ahc->tag = rman_get_bustag(regs);
209 ahc->bsh = rman_get_bushandle(regs);
210 if (ahc_pci_test_register_access(ahc) != 0) {
211 device_printf(ahc->dev_softc,
212 "PCI Device %d:%d:%d failed I/O "
213 "mapped test.\n",
214 aic_get_pci_bus(ahc->dev_softc),
215 aic_get_pci_slot(ahc->dev_softc),
216 aic_get_pci_function(ahc->dev_softc));
217 bus_release_resource(ahc->dev_softc, regs_type,
218 regs_id, regs);
219 regs = NULL;
220 } else {
221 command &= ~PCIM_CMD_MEMEN;
222 aic_pci_write_config(ahc->dev_softc,
223 PCIR_COMMAND,
224 command, /*bytes*/1);
225 }
226 }
227 }
228 if (regs == NULL) {
229 device_printf(ahc->dev_softc,
230 "can't allocate register resources\n");
231 return (ENOMEM);
232 }
233 ahc->platform_data->regs_res_type = regs_type;
234 ahc->platform_data->regs_res_id = regs_id;
235 ahc->platform_data->regs = regs;
236 return (0);
237 }
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