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
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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/ahd_pci.c#17 $
33 * $FreeBSD: src/sys/dev/aic7xxx/ahd_pci.c,v 1.19 2005/09/22 04:56:59 gibbs Exp $
36 #include "aic79xx_osm.h"
38 static int ahd_pci_probe(device_t dev);
39 static int ahd_pci_attach(device_t dev);
41 static device_method_t ahd_pci_device_methods[] = {
42 /* Device interface */
43 DEVMETHOD(device_probe, ahd_pci_probe),
44 DEVMETHOD(device_attach, ahd_pci_attach),
45 DEVMETHOD(device_detach, ahd_detach),
49 static driver_t ahd_pci_driver = {
51 ahd_pci_device_methods,
52 sizeof(struct ahd_softc)
55 static devclass_t ahd_devclass;
57 DRIVER_MODULE(ahd, pci, ahd_pci_driver, ahd_devclass, NULL, NULL);
58 DRIVER_MODULE(ahd, cardbus, ahd_pci_driver, ahd_devclass, NULL, NULL);
59 MODULE_DEPEND(ahd_pci, ahd, 1, 1, 1);
60 MODULE_VERSION(ahd_pci, 1);
63 ahd_pci_probe(device_t dev)
65 struct ahd_pci_identity *entry;
67 entry = ahd_find_pci_device(dev);
69 device_set_desc(dev, entry->name);
70 return (BUS_PROBE_DEFAULT);
76 ahd_pci_attach(device_t dev)
78 struct ahd_pci_identity *entry;
79 struct ahd_softc *ahd;
83 entry = ahd_find_pci_device(dev);
88 * Allocate a softc for this card and
89 * set it up for attachment by our
90 * common detect routine.
92 name = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_INTWAIT);
93 strcpy(name, device_get_nameunit(dev));
94 ahd = ahd_alloc(dev, name);
98 ahd_set_unit(ahd, device_get_unit(dev));
101 * Should we bother disabling 39Bit addressing
102 * based on installed memory?
104 if (sizeof(bus_addr_t) > 4)
105 ahd->flags |= AHD_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(ahd, /*parent*/NULL, /*alignment*/1,
111 (ahd->flags & AHD_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*/AHD_NSEG,
118 /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
123 kprintf("ahd_pci_attach: Could not allocate DMA tag "
124 "- error %d\n", error);
128 ahd->dev_softc = dev;
129 error = ahd_pci_config(ahd, entry);
140 ahd_pci_map_registers(struct ahd_softc *ahd)
142 struct resource *regs;
143 struct resource *regs2;
150 command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
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) {
161 device_printf(ahd->dev_softc,
162 "Defaulting to MEMIO on\n");
166 if ((command & PCIM_CMD_MEMEN) != 0
167 && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
168 && allow_memio != 0) {
170 regs_type = SYS_RES_MEMORY;
171 regs_id = AHD_PCI_MEMADDR;
172 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
173 ®s_id, RF_ACTIVE);
177 ahd->tags[0] = rman_get_bustag(regs);
178 ahd->bshs[0] = rman_get_bushandle(regs);
179 ahd->tags[1] = ahd->tags[0];
180 error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
185 * Do a quick test to see if memory mapped
186 * I/O is functioning correctly.
189 || ahd_pci_test_register_access(ahd) != 0) {
190 device_printf(ahd->dev_softc,
191 "PCI Device %d:%d:%d failed memory "
192 "mapped test. Using PIO.\n",
193 aic_get_pci_bus(ahd->dev_softc),
194 aic_get_pci_slot(ahd->dev_softc),
195 aic_get_pci_function(ahd->dev_softc));
196 bus_release_resource(ahd->dev_softc, regs_type,
200 command &= ~PCIM_CMD_PORTEN;
201 aic_pci_write_config(ahd->dev_softc,
203 command, /*bytes*/1);
207 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
208 regs_type = SYS_RES_IOPORT;
209 regs_id = AHD_PCI_IOADDR0;
210 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
211 ®s_id, RF_ACTIVE);
213 device_printf(ahd->dev_softc,
214 "can't allocate register resources\n");
217 ahd->tags[0] = rman_get_bustag(regs);
218 ahd->bshs[0] = rman_get_bushandle(regs);
220 /* And now the second BAR */
221 regs_id2 = AHD_PCI_IOADDR1;
222 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
223 ®s_id2, RF_ACTIVE);
225 device_printf(ahd->dev_softc,
226 "can't allocate register resources\n");
229 ahd->tags[1] = rman_get_bustag(regs2);
230 ahd->bshs[1] = rman_get_bushandle(regs2);
231 command &= ~PCIM_CMD_MEMEN;
232 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
233 command, /*bytes*/1);
234 ahd->platform_data->regs_res_type[1] = regs_type;
235 ahd->platform_data->regs_res_id[1] = regs_id2;
236 ahd->platform_data->regs[1] = regs2;
238 ahd->platform_data->regs_res_type[0] = regs_type;
239 ahd->platform_data->regs_res_id[0] = regs_id;
240 ahd->platform_data->regs[0] = regs;
245 ahd_pci_map_int(struct ahd_softc *ahd)
250 ahd->platform_data->irq =
251 bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
252 RF_ACTIVE | RF_SHAREABLE);
253 if (ahd->platform_data->irq == NULL)
255 ahd->platform_data->irq_res_type = SYS_RES_IRQ;
256 return (ahd_map_int(ahd));