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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/ahd_pci.c#17 $
32  */
33
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
36
37 #include <dev/aic7xxx/aic79xx_osm.h>
38
39 static int ahd_pci_probe(device_t dev);
40 static int ahd_pci_attach(device_t dev);
41
42 static device_method_t ahd_pci_device_methods[] = {
43         /* Device interface */
44         DEVMETHOD(device_probe,         ahd_pci_probe),
45         DEVMETHOD(device_attach,        ahd_pci_attach),
46         DEVMETHOD(device_detach,        ahd_detach),
47         { 0, 0 }
48 };
49
50 static driver_t ahd_pci_driver = {
51         "ahd",
52         ahd_pci_device_methods,
53         sizeof(struct ahd_softc)
54 };
55
56 static devclass_t ahd_devclass;
57
58 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, 0, 0);
59 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
60 MODULE_VERSION(ahd_pci, 1);
61
62 static int
63 ahd_pci_probe(device_t dev)
64 {
65         struct  ahd_pci_identity *entry;
66
67         entry = ahd_find_pci_device(dev);
68         if (entry != NULL) {
69                 device_set_desc(dev, entry->name);
70                 return (BUS_PROBE_DEFAULT);
71         }
72         return (ENXIO);
73 }
74
75 static int
76 ahd_pci_attach(device_t dev)
77 {
78         struct   ahd_pci_identity *entry;
79         struct   ahd_softc *ahd;
80         char    *name;
81         int      error;
82
83         entry = ahd_find_pci_device(dev);
84         if (entry == NULL)
85                 return (ENXIO);
86
87         /*
88          * Allocate a softc for this card and
89          * set it up for attachment by our
90          * common detect routine.
91          */
92         name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
93         if (name == NULL)
94                 return (ENOMEM);
95         strcpy(name, device_get_nameunit(dev));
96         ahd = ahd_alloc(dev, name);
97         if (ahd == NULL)
98                 return (ENOMEM);
99
100         ahd_set_unit(ahd, device_get_unit(dev));
101
102         /*
103          * Should we bother disabling 39Bit addressing
104          * based on installed memory?
105          */
106         if (sizeof(bus_addr_t) > 4)
107                 ahd->flags |= AHD_39BIT_ADDRESSING;
108
109         /* Allocate a dmatag for our SCB DMA maps */
110         error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev),
111                                    /*alignment*/1, /*boundary*/0,
112                                    (ahd->flags & AHD_39BIT_ADDRESSING)
113                                    ? 0x7FFFFFFFFF
114                                    : BUS_SPACE_MAXADDR_32BIT,
115                                    /*highaddr*/BUS_SPACE_MAXADDR,
116                                    /*filter*/NULL, /*filterarg*/NULL,
117                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
118                                    /*nsegments*/AHD_NSEG,
119                                    /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
120                                    /*flags*/0,
121                                    &ahd->parent_dmat);
122
123         if (error != 0) {
124                 printf("ahd_pci_attach: Could not allocate DMA tag "
125                        "- error %d\n", error);
126                 ahd_free(ahd);
127                 return (ENOMEM);
128         }
129         ahd->dev_softc = dev;
130         error = ahd_pci_config(ahd, entry);
131         if (error != 0) {
132                 ahd_free(ahd);
133                 return (error);
134         }
135
136         ahd_sysctl(ahd);
137         ahd_attach(ahd);
138         return (0);
139 }
140
141 int
142 ahd_pci_map_registers(struct ahd_softc *ahd)
143 {
144         struct  resource *regs;
145         struct  resource *regs2;
146         int     regs_type;
147         int     regs_id;
148         int     regs_id2;
149         int     allow_memio;
150
151         regs = NULL;
152         regs2 = NULL;
153         regs_type = 0;
154         regs_id = 0;
155
156         /* Retrieve the per-device 'allow_memio' hint */
157         if (resource_int_value(device_get_name(ahd->dev_softc),
158                                device_get_unit(ahd->dev_softc),
159                                "allow_memio", &allow_memio) != 0) {
160                 if (bootverbose)
161                         device_printf(ahd->dev_softc,
162                                       "Defaulting to MEMIO on\n");
163                 allow_memio = 1;
164         }
165
166         if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
167          && allow_memio != 0) {
168
169                 regs_type = SYS_RES_MEMORY;
170                 regs_id = AHD_PCI_MEMADDR;
171                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
172                                               &regs_id, RF_ACTIVE);
173                 if (regs != NULL) {
174                         int error;
175
176                         ahd->tags[0] = rman_get_bustag(regs);
177                         ahd->bshs[0] = rman_get_bushandle(regs);
178                         ahd->tags[1] = ahd->tags[0];
179                         error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
180                                                     /*offset*/0x100,
181                                                     /*size*/0x100,
182                                                     &ahd->bshs[1]);
183                         /*
184                          * Do a quick test to see if memory mapped
185                          * I/O is functioning correctly.
186                          */
187                         if (error != 0
188                          || ahd_pci_test_register_access(ahd) != 0) {
189                                 device_printf(ahd->dev_softc,
190                                        "PCI Device %d:%d:%d failed memory "
191                                        "mapped test.  Using PIO.\n",
192                                        aic_get_pci_bus(ahd->dev_softc),
193                                        aic_get_pci_slot(ahd->dev_softc),
194                                        aic_get_pci_function(ahd->dev_softc));
195                                 bus_release_resource(ahd->dev_softc, regs_type,
196                                                      regs_id, regs);
197                                 regs = NULL;
198                                 AHD_CORRECTABLE_ERROR(ahd);
199                         }
200                 }
201         }
202         if (regs == NULL) {
203                 regs_type = SYS_RES_IOPORT;
204                 regs_id = AHD_PCI_IOADDR0;
205                 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
206                                               &regs_id, RF_ACTIVE);
207                 if (regs == NULL) {
208                         device_printf(ahd->dev_softc,
209                                       "can't allocate register resources\n");
210                         AHD_UNCORRECTABLE_ERROR(ahd);
211                         return (ENOMEM);
212                 }
213                 ahd->tags[0] = rman_get_bustag(regs);
214                 ahd->bshs[0] = rman_get_bushandle(regs);
215
216                 /* And now the second BAR */
217                 regs_id2 = AHD_PCI_IOADDR1;
218                 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
219                                                &regs_id2, RF_ACTIVE);
220                 if (regs2 == NULL) {
221                         device_printf(ahd->dev_softc,
222                                       "can't allocate register resources\n");
223                         AHD_UNCORRECTABLE_ERROR(ahd);
224                         return (ENOMEM);
225                 }
226                 ahd->tags[1] = rman_get_bustag(regs2);
227                 ahd->bshs[1] = rman_get_bushandle(regs2);
228                 ahd->platform_data->regs_res_type[1] = regs_type;
229                 ahd->platform_data->regs_res_id[1] = regs_id2;
230                 ahd->platform_data->regs[1] = regs2;
231         }
232         ahd->platform_data->regs_res_type[0] = regs_type;
233         ahd->platform_data->regs_res_id[0] = regs_id;
234         ahd->platform_data->regs[0] = regs;
235         return (0);
236 }
237
238 int
239 ahd_pci_map_int(struct ahd_softc *ahd)
240 {
241         int zero;
242
243         zero = 0;
244         ahd->platform_data->irq =
245             bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
246                                    RF_ACTIVE | RF_SHAREABLE);
247         if (ahd->platform_data->irq == NULL)
248                 return (ENOMEM);
249         ahd->platform_data->irq_res_type = SYS_RES_IRQ;
250         return (ahd_map_int(ahd));
251 }