b7d832041fcae32ba3962931b04be757c682799a
[dragonfly.git] / sys / dev / disk / aic7xxx / ahc_pci.c
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  * $FreeBSD: src/sys/dev/aic7xxx/ahc_pci.c,v 1.61 2004/03/17 17:50:25 njl Exp $
34  * $DragonFly: src/sys/dev/disk/aic7xxx/ahc_pci.c,v 1.11 2007/07/06 01:11:07 pavalos Exp $
35  */
36
37 #include "aic7xxx_osm.h"
38
39 #ifdef AHC_PCI_CONFIG
40
41 static int ahc_pci_probe(device_t dev);
42 static int ahc_pci_attach(device_t dev);
43
44 static device_method_t ahc_pci_device_methods[] = {
45         /* Device interface */
46         DEVMETHOD(device_probe,         ahc_pci_probe),
47         DEVMETHOD(device_attach,        ahc_pci_attach),
48         DEVMETHOD(device_detach,        ahc_detach),
49         { 0, 0 }
50 };
51
52 static driver_t ahc_pci_driver = {
53         "ahc",
54         ahc_pci_device_methods,
55         sizeof(struct ahc_softc)
56 };
57
58 DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_devclass, 0, 0);
59 DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_devclass, 0, 0);
60 MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
61 MODULE_VERSION(ahc_pci, 1);
62
63 static int
64 ahc_pci_probe(device_t dev)
65 {
66         struct  ahc_pci_identity *entry;
67
68         entry = ahc_find_pci_device(dev);
69         if (entry != NULL) {
70                 device_set_desc(dev, entry->name);
71                 return (0);
72         }
73         return (ENXIO);
74 }
75
76 static int
77 ahc_pci_attach(device_t dev)
78 {
79         struct   ahc_pci_identity *entry;
80         struct   ahc_softc *ahc;
81         char    *name;
82         int      error;
83
84         entry = ahc_find_pci_device(dev);
85         if (entry == NULL)
86                 return (ENXIO);
87
88         /*
89          * Allocate a softc for this card and
90          * set it up for attachment by our
91          * common detect routine.
92          */
93         name = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_WAITOK);
94         strcpy(name, device_get_nameunit(dev));
95         ahc = ahc_alloc(dev, name);
96         if (ahc == NULL)
97                 return (ENOMEM);
98
99         ahc_set_unit(ahc, device_get_unit(dev));
100
101         /*
102          * Should we bother disabling 39Bit addressing
103          * based on installed memory?
104          */
105         if (sizeof(bus_addr_t) > 4)
106                 ahc->flags |= AHC_39BIT_ADDRESSING;
107
108         /* Allocate a dmatag for our SCB DMA maps */
109         /* XXX Should be a child of the PCI bus dma tag */
110         error = aic_dma_tag_create(ahc, /*parent*/NULL, /*alignment*/1,
111                                    /*boundary*/0,
112                                    (ahc->flags & AHC_39BIT_ADDRESSING)
113                                    ? 0x7FFFFFFFFFULL
114                                    : BUS_SPACE_MAXADDR_32BIT,
115                                    /*highaddr*/BUS_SPACE_MAXADDR,
116                                    /*filter*/NULL, /*filterarg*/NULL,
117                                    /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
118                                    /*nsegments*/AHC_NSEG,
119                                    /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
120                                    /*flags*/0,
121                                    &ahc->parent_dmat);
122
123         if (error != 0) {
124                 kprintf("ahc_pci_attach: Could not allocate DMA tag "
125                        "- error %d\n", error);
126                 ahc_free(ahc);
127                 return (ENOMEM);
128         }
129         ahc->dev_softc = dev;
130         error = ahc_pci_config(ahc, entry);
131         if (error != 0) {
132                 ahc_free(ahc);
133                 return (error);
134         }
135
136         ahc_attach(ahc);
137         return (0);
138 }
139
140 int
141 ahc_pci_map_registers(struct ahc_softc *ahc)
142 {
143         struct  resource *regs;
144         u_int   command;
145         int     regs_type;
146         int     regs_id;
147         int     allow_memio;
148
149         command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
150         regs = NULL;
151         regs_type = 0;
152         regs_id = 0;
153
154         /* Retrieve the per-device 'allow_memio' hint */
155         if (resource_int_value(device_get_name(ahc->dev_softc),
156                                device_get_unit(ahc->dev_softc),
157                                "allow_memio", &allow_memio) != 0) {
158                 if (bootverbose)
159                         device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
160 #ifdef AHC_ALLOW_MEMIO
161                 if (bootverbose)
162                         kprintf("on\n");
163                 allow_memio = 1;
164 #else
165                 if (bootverbose)
166                         kprintf("off\n");
167                 allow_memio = 0;
168 #endif
169         }
170
171         if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
172
173                 regs_type = SYS_RES_MEMORY;
174                 regs_id = AHC_PCI_MEMADDR;
175                 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
176                                               &regs_id, RF_ACTIVE);
177                 if (regs != NULL) {
178                         ahc->tag = rman_get_bustag(regs);
179                         ahc->bsh = rman_get_bushandle(regs);
180
181                         /*
182                          * Do a quick test to see if memory mapped
183                          * I/O is functioning correctly.
184                          */
185                         if (ahc_pci_test_register_access(ahc) != 0) {
186                                 device_printf(ahc->dev_softc,
187                                        "PCI Device %d:%d:%d failed memory "
188                                        "mapped test.  Using PIO.\n",
189                                        aic_get_pci_bus(ahc->dev_softc),
190                                        aic_get_pci_slot(ahc->dev_softc),
191                                        aic_get_pci_function(ahc->dev_softc));
192                                 bus_release_resource(ahc->dev_softc, regs_type,
193                                                      regs_id, regs);
194                                 regs = NULL;
195                         } else {
196                                 command &= ~PCIM_CMD_PORTEN;
197                                 aic_pci_write_config(ahc->dev_softc,
198                                                      PCIR_COMMAND,
199                                                      command, /*bytes*/1);
200                         }
201                 }
202         }
203
204         if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
205                 regs_type = SYS_RES_IOPORT;
206                 regs_id = AHC_PCI_IOADDR;
207                 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
208                                               &regs_id, RF_ACTIVE);
209                 if (regs != NULL) {
210                         ahc->tag = rman_get_bustag(regs);
211                         ahc->bsh = rman_get_bushandle(regs);
212                         if (ahc_pci_test_register_access(ahc) != 0) {
213                                 device_printf(ahc->dev_softc,
214                                        "PCI Device %d:%d:%d failed I/O "
215                                        "mapped test.\n",
216                                        aic_get_pci_bus(ahc->dev_softc),
217                                        aic_get_pci_slot(ahc->dev_softc),
218                                        aic_get_pci_function(ahc->dev_softc));
219                                 bus_release_resource(ahc->dev_softc, regs_type,
220                                                      regs_id, regs);
221                                 regs = NULL;
222                         } else {
223                                 command &= ~PCIM_CMD_MEMEN;
224                                 aic_pci_write_config(ahc->dev_softc,
225                                                      PCIR_COMMAND,
226                                                      command, /*bytes*/1);
227                         }
228                 }
229         }
230         if (regs == NULL) {
231                 device_printf(ahc->dev_softc,
232                               "can't allocate register resources\n");
233                 return (ENOMEM);
234         }
235         ahc->platform_data->regs_res_type = regs_type;
236         ahc->platform_data->regs_res_id = regs_id;
237         ahc->platform_data->regs = regs;
238         return (0);
239 }
240
241 int
242 ahc_pci_map_int(struct ahc_softc *ahc)
243 {
244         int zero;
245
246         zero = 0;
247         ahc->platform_data->irq =
248             bus_alloc_resource_any(ahc->dev_softc, SYS_RES_IRQ, &zero,
249                                    RF_ACTIVE | RF_SHAREABLE);
250         if (ahc->platform_data->irq == NULL) {
251                 device_printf(ahc->dev_softc,
252                               "bus_alloc_resource() failed to allocate IRQ\n");
253                 return (ENOMEM);
254         }
255         ahc->platform_data->irq_res_type = SYS_RES_IRQ;
256         return (ahc_map_int(ahc));
257 }
258
259
260 #endif