2 * FreeBSD, VLB/ISA product support functions
4 * Copyright (c) 2004 Justin T. Gibbs.
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37 * $FreeBSD: src/sys/dev/aic7xxx/ahc_isa.c,v 1.5 2004/10/15 23:39:52 gibbs Exp $
38 * $DragonFly: src/sys/dev/disk/aic7xxx/ahc_isa.c,v 1.4 2008/05/18 20:30:21 pavalos Exp $
41 #include "aic7xxx_osm.h"
43 #include <machine/limits.h> /* For CHAR_BIT */
44 #include <bus/isa/isavar.h> /* For ISA attach glue */
47 static struct aic7770_identity *ahc_isa_find_device(bus_space_tag_t tag,
48 bus_space_handle_t bsh);
49 static void ahc_isa_identify(driver_t *driver,
51 static int ahc_isa_probe(device_t dev);
52 static int ahc_isa_attach(device_t dev);
55 * Perform an EISA probe of the address with the addition
56 * of a "priming" step. The 284X requires priming (a write
57 * to offset 0x80, the first EISA ID register) to ensure it
58 * is not mistaken as an EISA card. Once we have the ID,
59 * lookup the controller in the aic7770 table of supported
62 static struct aic7770_identity *
63 ahc_isa_find_device(bus_space_tag_t tag, bus_space_handle_t bsh) {
70 for (i = 0; i < id_size; i++) {
71 bus_space_write_1(tag, bsh, 0x80, 0x80 + i);
72 id |= bus_space_read_1(tag, bsh, 0x80 + i)
73 << ((id_size - i - 1) * CHAR_BIT);
76 return (aic7770_find_device(id));
80 ahc_isa_identify(driver_t *driver, device_t parent)
86 for (slot = 0; slot <= max_slot; slot++) {
87 struct aic7770_identity *entry;
89 bus_space_handle_t bsh;
90 struct resource *regs;
95 iobase = (slot * AHC_EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET;
96 regs = bus_alloc_resource(parent, SYS_RES_IOPORT, &rid,
97 iobase, iobase, AHC_EISA_IOSIZE,
101 kprintf("ahc_isa_probe %d: ioport 0x%x "
102 "alloc failed\n", slot, iobase);
106 tag = rman_get_bustag(regs);
107 bsh = rman_get_bushandle(regs);
109 entry = ahc_isa_find_device(tag, bsh);
113 child = BUS_ADD_CHILD(parent, parent, ISA_ORDER_SPECULATIVE,
116 device_set_driver(child, driver);
117 bus_set_resource(child, SYS_RES_IOPORT,
118 0, iobase, AHC_EISA_IOSIZE);
121 bus_release_resource(parent, SYS_RES_IOPORT, rid, regs);
126 ahc_isa_probe(device_t dev)
128 struct aic7770_identity *entry;
130 bus_space_handle_t bsh;
131 struct resource *regs;
132 struct resource *irq;
145 /* Skip probes for ISA PnP devices */
146 if (isa_get_logicalid(dev) != 0)
149 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE);
151 device_printf(dev, "No resources allocated.\n");
155 iobase = rman_get_start(regs);
156 tag = rman_get_bustag(regs);
157 bsh = rman_get_bushandle(regs);
159 entry = ahc_isa_find_device(tag, bsh);
163 /* Pause the card preseving the IRQ type */
164 hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS;
165 bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE);
166 while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0)
169 /* Make sure we have a valid interrupt vector */
170 intdef = bus_space_read_1(tag, bsh, INTDEF);
171 irq_num = intdef & VECTOR;
181 device_printf(dev, "@0x%x: illegal irq setting %d\n",
186 if (bus_set_resource(dev, SYS_RES_IRQ, zero, irq_num, 1) != 0)
190 * The 284X only supports edge triggered interrupts,
191 * so do not claim RF_SHAREABLE.
193 irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
194 0 /*!(RF_ACTIVE|RF_SHAREABLE)*/);
197 device_set_desc(dev, entry->name);
199 device_printf(dev, "@0x%x: irq %d allocation failed\n",
204 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs);
209 bus_release_resource(dev, SYS_RES_IRQ, zero, irq);
217 ahc_isa_attach(device_t dev)
219 struct aic7770_identity *entry;
221 bus_space_handle_t bsh;
222 struct resource *regs;
223 struct ahc_softc *ahc;
229 regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE);
233 tag = rman_get_bustag(regs);
234 bsh = rman_get_bushandle(regs);
235 entry = ahc_isa_find_device(tag, bsh);
236 bus_release_resource(dev, SYS_RES_IOPORT, zero, regs);
241 * Allocate a softc for this card and
242 * set it up for attachment by our
243 * common detect routine.
245 name = kmalloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_INTWAIT);
246 strcpy(name, device_get_nameunit(dev));
247 ahc = ahc_alloc(dev, name);
251 ahc_set_unit(ahc, device_get_unit(dev));
253 /* Allocate a dmatag for our SCB DMA maps */
254 /* XXX Should be a child of the VLB/ISA bus dma tag */
255 error = aic_dma_tag_create(ahc, /*parent*/NULL, /*alignment*/1,
257 /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
258 /*highaddr*/BUS_SPACE_MAXADDR,
259 /*filter*/NULL, /*filterarg*/NULL,
260 /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
261 /*nsegments*/AHC_NSEG,
262 /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
267 kprintf("ahc_isa_attach: Could not allocate DMA tag "
268 "- error %d\n", error);
272 ahc->dev_softc = dev;
273 error = aic7770_config(ahc, entry, /*unused ioport arg*/0);
283 static device_method_t ahc_isa_device_methods[] = {
284 /* Device interface */
285 DEVMETHOD(device_identify, ahc_isa_identify),
286 DEVMETHOD(device_probe, ahc_isa_probe),
287 DEVMETHOD(device_attach, ahc_isa_attach),
288 DEVMETHOD(device_detach, ahc_detach),
292 static driver_t ahc_isa_driver = {
294 ahc_isa_device_methods,
295 sizeof(struct ahc_softc)
298 DRIVER_MODULE(ahc_isa, isa, ahc_isa_driver, ahc_devclass, 0, 0);
299 MODULE_DEPEND(ahc_isa, ahc, 1, 1, 1);
300 MODULE_VERSION(ahc_isa, 1);