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
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22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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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
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31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#19 $
33 * $FreeBSD: src/sys/dev/aic7xxx/ahc_pci.c,v 1.60 2003/12/17 00:02:09 gibbs Exp $
34 * $DragonFly: src/sys/dev/disk/aic7xxx/ahc_pci.c,v 1.10 2007/07/06 00:01:16 pavalos Exp $
37 #include "aic7xxx_osm.h"
41 static int ahc_pci_probe(device_t dev);
42 static int ahc_pci_attach(device_t dev);
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),
52 static driver_t ahc_pci_driver = {
54 ahc_pci_device_methods,
55 sizeof(struct ahc_softc)
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);
64 ahc_pci_probe(device_t dev)
66 struct ahc_pci_identity *entry;
68 entry = ahc_find_pci_device(dev);
70 device_set_desc(dev, entry->name);
77 ahc_pci_attach(device_t dev)
79 struct ahc_pci_identity *entry;
80 struct ahc_softc *ahc;
84 entry = ahc_find_pci_device(dev);
89 * Allocate a softc for this card and
90 * set it up for attachment by our
91 * common detect routine.
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);
99 ahc_set_unit(ahc, device_get_unit(dev));
102 * Should we bother disabling 39Bit addressing
103 * based on installed memory?
105 if (sizeof(bus_addr_t) > 4)
106 ahc->flags |= AHC_39BIT_ADDRESSING;
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,
112 (ahc->flags & AHC_39BIT_ADDRESSING)
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,
124 kprintf("ahc_pci_attach: Could not allocate DMA tag "
125 "- error %d\n", error);
129 ahc->dev_softc = dev;
130 error = ahc_pci_config(ahc, entry);
141 ahc_pci_map_registers(struct ahc_softc *ahc)
143 struct resource *regs;
149 command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
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) {
159 device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
160 #ifdef AHC_ALLOW_MEMIO
171 if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
173 regs_type = SYS_RES_MEMORY;
174 regs_id = AHC_PCI_MEMADDR;
175 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
176 ®s_id, 0, ~0, 1, RF_ACTIVE);
178 ahc->tag = rman_get_bustag(regs);
179 ahc->bsh = rman_get_bushandle(regs);
182 * Do a quick test to see if memory mapped
183 * I/O is functioning correctly.
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,
196 command &= ~PCIM_CMD_PORTEN;
197 aic_pci_write_config(ahc->dev_softc,
199 command, /*bytes*/1);
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(ahc->dev_softc, regs_type,
208 ®s_id, 0, ~0, 1, RF_ACTIVE);
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 "
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,
223 command &= ~PCIM_CMD_MEMEN;
224 aic_pci_write_config(ahc->dev_softc,
226 command, /*bytes*/1);
231 device_printf(ahc->dev_softc,
232 "can't allocate register resources\n");
235 ahc->platform_data->regs_res_type = regs_type;
236 ahc->platform_data->regs_res_id = regs_id;
237 ahc->platform_data->regs = regs;
242 ahc_pci_map_int(struct ahc_softc *ahc)
247 ahc->platform_data->irq =
248 bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
249 0, ~0, 1, 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");
255 ahc->platform_data->irq_res_type = SYS_RES_IRQ;
256 return (ahc_map_int(ahc));