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)
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31 * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#9 $
36 #include <dev/aic7xxx/aic7xxx_osm.h>
38 #define AHC_PCI_IOADDR PCIR_MAPS /* I/O Address */
39 #define AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
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 = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
96 strcpy(name, device_get_nameunit(dev));
97 ahc = ahc_alloc(dev, name);
101 ahc_set_unit(ahc, device_get_unit(dev));
104 * Should we bother disabling 39Bit addressing
105 * based on installed memory?
107 if (sizeof(bus_addr_t) > 4)
108 ahc->flags |= AHC_39BIT_ADDRESSING;
110 /* Allocate a dmatag for our SCB DMA maps */
111 /* XXX Should be a child of the PCI bus dma tag */
112 error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
114 (ahc->flags & AHC_39BIT_ADDRESSING)
116 : BUS_SPACE_MAXADDR_32BIT,
117 /*highaddr*/BUS_SPACE_MAXADDR,
118 /*filter*/NULL, /*filterarg*/NULL,
119 /*maxsize*/MAXBSIZE, /*nsegments*/AHC_NSEG,
120 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
121 /*flags*/BUS_DMA_ALLOCNOW,
125 printf("ahc_pci_attach: Could not allocate DMA tag "
126 "- error %d\n", error);
130 ahc->dev_softc = dev;
131 error = ahc_pci_config(ahc, entry);
142 ahc_pci_map_registers(struct ahc_softc *ahc)
144 struct resource *regs;
149 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
153 #ifdef AHC_ALLOW_MEMIO
154 if ((command & PCIM_CMD_MEMEN) != 0) {
156 regs_type = SYS_RES_MEMORY;
157 regs_id = AHC_PCI_MEMADDR;
158 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
159 ®s_id, 0, ~0, 1, RF_ACTIVE);
161 ahc->tag = rman_get_bustag(regs);
162 ahc->bsh = rman_get_bushandle(regs);
165 * Do a quick test to see if memory mapped
166 * I/O is functioning correctly.
168 if (ahc_inb(ahc, HCNTRL) == 0xFF) {
169 device_printf(ahc->dev_softc,
170 "PCI Device %d:%d:%d failed memory "
171 "mapped test. Using PIO.\n",
172 ahc_get_pci_bus(ahc->dev_softc),
173 ahc_get_pci_slot(ahc->dev_softc),
174 ahc_get_pci_function(ahc->dev_softc));
175 bus_release_resource(ahc->dev_softc, regs_type,
179 command &= ~PCIM_CMD_PORTEN;
180 ahc_pci_write_config(ahc->dev_softc,
182 command, /*bytes*/1);
187 if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
188 regs_type = SYS_RES_IOPORT;
189 regs_id = AHC_PCI_IOADDR;
190 regs = bus_alloc_resource(ahc->dev_softc, regs_type,
191 ®s_id, 0, ~0, 1, RF_ACTIVE);
193 ahc->tag = rman_get_bustag(regs);
194 ahc->bsh = rman_get_bushandle(regs);
195 command &= ~PCIM_CMD_MEMEN;
196 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
197 command, /*bytes*/1);
201 device_printf(ahc->dev_softc,
202 "can't allocate register resources\n");
205 ahc->platform_data->regs_res_type = regs_type;
206 ahc->platform_data->regs_res_id = regs_id;
207 ahc->platform_data->regs = regs;
212 ahc_pci_map_int(struct ahc_softc *ahc)
217 ahc->platform_data->irq =
218 bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
219 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
220 if (ahc->platform_data->irq == NULL) {
221 device_printf(ahc->dev_softc,
222 "bus_alloc_resource() failed to allocate IRQ\n");
225 ahc->platform_data->irq_res_type = SYS_RES_IRQ;
226 return (ahc_map_int(ahc));
230 ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
236 * Traverse the capability list looking for
237 * the power management capability.
240 cap_offset = ahc_pci_read_config(ahc->dev_softc,
241 PCIR_CAP_PTR, /*bytes*/1);
242 while (cap_offset != 0) {
244 cap = ahc_pci_read_config(ahc->dev_softc,
245 cap_offset, /*bytes*/4);
246 if ((cap & 0xFF) == 1
247 && ((cap >> 16) & 0x3) > 0) {
250 pm_control = ahc_pci_read_config(ahc->dev_softc,
254 pm_control |= new_state;
255 ahc_pci_write_config(ahc->dev_softc,
257 pm_control, /*bytes*/2);
260 cap_offset = (cap >> 8) & 0xFF;