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
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
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31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahd_pci.c#17 $
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <dev/aic7xxx/aic79xx_osm.h>
39 static int ahd_pci_probe(device_t dev);
40 static int ahd_pci_attach(device_t dev);
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),
50 static driver_t ahd_pci_driver = {
52 ahd_pci_device_methods,
53 sizeof(struct ahd_softc)
56 static devclass_t ahd_devclass;
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);
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 = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
95 strcpy(name, device_get_nameunit(dev));
96 ahd = ahd_alloc(dev, name);
100 ahd_set_unit(ahd, device_get_unit(dev));
103 * Should we bother disabling 39Bit addressing
104 * based on installed memory?
106 if (sizeof(bus_addr_t) > 4)
107 ahd->flags |= AHD_39BIT_ADDRESSING;
109 /* Allocate a dmatag for our SCB DMA maps */
110 /* XXX Should be a child of the PCI bus dma tag */
111 error = aic_dma_tag_create(ahd, /*parent*/bus_get_dma_tag(dev),
112 /*alignment*/1, /*boundary*/0,
113 (ahd->flags & AHD_39BIT_ADDRESSING)
115 : BUS_SPACE_MAXADDR_32BIT,
116 /*highaddr*/BUS_SPACE_MAXADDR,
117 /*filter*/NULL, /*filterarg*/NULL,
118 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
119 /*nsegments*/AHD_NSEG,
120 /*maxsegsz*/AHD_MAXTRANSFER_SIZE,
125 printf("ahd_pci_attach: Could not allocate DMA tag "
126 "- error %d\n", error);
130 ahd->dev_softc = dev;
131 error = ahd_pci_config(ahd, entry);
143 ahd_pci_map_registers(struct ahd_softc *ahd)
145 struct resource *regs;
146 struct resource *regs2;
153 command = aic_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
159 /* Retrieve the per-device 'allow_memio' hint */
160 if (resource_int_value(device_get_name(ahd->dev_softc),
161 device_get_unit(ahd->dev_softc),
162 "allow_memio", &allow_memio) != 0) {
164 device_printf(ahd->dev_softc,
165 "Defaulting to MEMIO on\n");
169 if ((command & PCIM_CMD_MEMEN) != 0
170 && (ahd->bugs & AHD_PCIX_MMAPIO_BUG) == 0
171 && allow_memio != 0) {
173 regs_type = SYS_RES_MEMORY;
174 regs_id = AHD_PCI_MEMADDR;
175 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
176 ®s_id, RF_ACTIVE);
180 ahd->tags[0] = rman_get_bustag(regs);
181 ahd->bshs[0] = rman_get_bushandle(regs);
182 ahd->tags[1] = ahd->tags[0];
183 error = bus_space_subregion(ahd->tags[0], ahd->bshs[0],
188 * Do a quick test to see if memory mapped
189 * I/O is functioning correctly.
192 || ahd_pci_test_register_access(ahd) != 0) {
193 device_printf(ahd->dev_softc,
194 "PCI Device %d:%d:%d failed memory "
195 "mapped test. Using PIO.\n",
196 aic_get_pci_bus(ahd->dev_softc),
197 aic_get_pci_slot(ahd->dev_softc),
198 aic_get_pci_function(ahd->dev_softc));
199 bus_release_resource(ahd->dev_softc, regs_type,
202 AHD_CORRECTABLE_ERROR(ahd);
204 command &= ~PCIM_CMD_PORTEN;
205 aic_pci_write_config(ahd->dev_softc,
207 command, /*bytes*/1);
211 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
212 regs_type = SYS_RES_IOPORT;
213 regs_id = AHD_PCI_IOADDR0;
214 regs = bus_alloc_resource_any(ahd->dev_softc, regs_type,
215 ®s_id, RF_ACTIVE);
217 device_printf(ahd->dev_softc,
218 "can't allocate register resources\n");
219 AHD_UNCORRECTABLE_ERROR(ahd);
222 ahd->tags[0] = rman_get_bustag(regs);
223 ahd->bshs[0] = rman_get_bushandle(regs);
225 /* And now the second BAR */
226 regs_id2 = AHD_PCI_IOADDR1;
227 regs2 = bus_alloc_resource_any(ahd->dev_softc, regs_type,
228 ®s_id2, RF_ACTIVE);
230 device_printf(ahd->dev_softc,
231 "can't allocate register resources\n");
232 AHD_UNCORRECTABLE_ERROR(ahd);
235 ahd->tags[1] = rman_get_bustag(regs2);
236 ahd->bshs[1] = rman_get_bushandle(regs2);
237 command &= ~PCIM_CMD_MEMEN;
238 aic_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
239 command, /*bytes*/1);
240 ahd->platform_data->regs_res_type[1] = regs_type;
241 ahd->platform_data->regs_res_id[1] = regs_id2;
242 ahd->platform_data->regs[1] = regs2;
244 ahd->platform_data->regs_res_type[0] = regs_type;
245 ahd->platform_data->regs_res_id[0] = regs_id;
246 ahd->platform_data->regs[0] = regs;
251 ahd_pci_map_int(struct ahd_softc *ahd)
256 ahd->platform_data->irq =
257 bus_alloc_resource_any(ahd->dev_softc, SYS_RES_IRQ, &zero,
258 RF_ACTIVE | RF_SHAREABLE);
259 if (ahd->platform_data->irq == NULL)
261 ahd->platform_data->irq_res_type = SYS_RES_IRQ;
262 return (ahd_map_int(ahd));