2 * FreeBSD, PCI product support functions
4 * Copyright (c) 1995-2001 Justin T. Gibbs
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
16 * Alternatively, this software may be distributed under the terms of the
17 * GNU Public License ("GPL").
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
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#19 $
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <dev/aic7xxx/aic7xxx_osm.h>
39 static int ahc_pci_probe(device_t dev);
40 static int ahc_pci_attach(device_t dev);
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),
50 static driver_t ahc_pci_driver = {
52 ahc_pci_device_methods,
53 sizeof(struct ahc_softc)
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);
61 ahc_pci_probe(device_t dev)
63 struct ahc_pci_identity *entry;
65 entry = ahc_find_pci_device(dev);
67 device_set_desc(dev, entry->name);
68 return (BUS_PROBE_DEFAULT);
74 ahc_pci_attach(device_t dev)
76 struct ahc_pci_identity *entry;
77 struct ahc_softc *ahc;
81 entry = ahc_find_pci_device(dev);
86 * Allocate a softc for this card and
87 * set it up for attachment by our
88 * common detect routine.
90 name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
93 strcpy(name, device_get_nameunit(dev));
94 ahc = ahc_alloc(dev, name);
98 ahc_set_unit(ahc, device_get_unit(dev));
101 * Should we bother disabling 39Bit addressing
102 * based on installed memory?
104 if (sizeof(bus_addr_t) > 4)
105 ahc->flags |= AHC_39BIT_ADDRESSING;
107 /* Allocate a dmatag for our SCB DMA maps */
108 /* XXX Should be a child of the PCI bus dma tag */
109 error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
110 /*alignment*/1, /*boundary*/0,
111 (ahc->flags & AHC_39BIT_ADDRESSING)
113 : BUS_SPACE_MAXADDR_32BIT,
114 /*highaddr*/BUS_SPACE_MAXADDR,
115 /*filter*/NULL, /*filterarg*/NULL,
116 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
117 /*nsegments*/AHC_NSEG,
118 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
123 printf("ahc_pci_attach: Could not allocate DMA tag "
124 "- error %d\n", error);
128 ahc->dev_softc = dev;
129 error = ahc_pci_config(ahc, entry);
140 ahc_pci_map_registers(struct ahc_softc *ahc)
142 struct resource *regs;
148 command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
153 /* Retrieve the per-device 'allow_memio' hint */
154 if (resource_int_value(device_get_name(ahc->dev_softc),
155 device_get_unit(ahc->dev_softc),
156 "allow_memio", &allow_memio) != 0) {
158 device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
159 #ifdef AHC_ALLOW_MEMIO
170 if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
172 regs_type = SYS_RES_MEMORY;
173 regs_id = AHC_PCI_MEMADDR;
174 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
175 ®s_id, RF_ACTIVE);
177 ahc->tag = rman_get_bustag(regs);
178 ahc->bsh = rman_get_bushandle(regs);
181 * Do a quick test to see if memory mapped
182 * I/O is functioning correctly.
184 if (ahc_pci_test_register_access(ahc) != 0) {
185 device_printf(ahc->dev_softc,
186 "PCI Device %d:%d:%d failed memory "
187 "mapped test. Using PIO.\n",
188 aic_get_pci_bus(ahc->dev_softc),
189 aic_get_pci_slot(ahc->dev_softc),
190 aic_get_pci_function(ahc->dev_softc));
191 bus_release_resource(ahc->dev_softc, regs_type,
195 command &= ~PCIM_CMD_PORTEN;
196 aic_pci_write_config(ahc->dev_softc,
198 command, /*bytes*/1);
203 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
204 regs_type = SYS_RES_IOPORT;
205 regs_id = AHC_PCI_IOADDR;
206 regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
207 ®s_id, RF_ACTIVE);
209 ahc->tag = rman_get_bustag(regs);
210 ahc->bsh = rman_get_bushandle(regs);
211 if (ahc_pci_test_register_access(ahc) != 0) {
212 device_printf(ahc->dev_softc,
213 "PCI Device %d:%d:%d failed I/O "
215 aic_get_pci_bus(ahc->dev_softc),
216 aic_get_pci_slot(ahc->dev_softc),
217 aic_get_pci_function(ahc->dev_softc));
218 bus_release_resource(ahc->dev_softc, regs_type,
222 command &= ~PCIM_CMD_MEMEN;
223 aic_pci_write_config(ahc->dev_softc,
225 command, /*bytes*/1);
230 device_printf(ahc->dev_softc,
231 "can't allocate register resources\n");
234 ahc->platform_data->regs_res_type = regs_type;
235 ahc->platform_data->regs_res_id = regs_id;
236 ahc->platform_data->regs = regs;