2 * Copyright 2003 by Peter Grehan. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/module.h>
35 #include <sys/kernel.h>
37 #include <dev/ofw/openfirm.h>
38 #include <dev/ofw/ofw_pci.h>
40 #include <dev/pci/pcivar.h>
41 #include <dev/pci/pcireg.h>
43 #include <machine/bus.h>
44 #include <machine/md_var.h>
45 #include <machine/nexusvar.h>
46 #include <machine/resource.h>
50 #include <powerpc/ofw/ofw_pci.h>
51 #include <powerpc/powermac/gracklevar.h>
58 int badaddr(void *, size_t); /* XXX */
63 static int grackle_probe(device_t);
64 static int grackle_attach(device_t);
69 static int grackle_read_ivar(device_t, device_t, int,
71 static struct resource * grackle_alloc_resource(device_t bus,
72 device_t child, int type, int *rid, u_long start,
73 u_long end, u_long count, u_int flags);
74 static int grackle_release_resource(device_t bus, device_t child,
75 int type, int rid, struct resource *res);
76 static int grackle_activate_resource(device_t bus, device_t child,
77 int type, int rid, struct resource *res);
78 static int grackle_deactivate_resource(device_t bus,
79 device_t child, int type, int rid,
80 struct resource *res);
86 static int grackle_maxslots(device_t);
87 static u_int32_t grackle_read_config(device_t, u_int, u_int, u_int,
89 static void grackle_write_config(device_t, u_int, u_int, u_int,
90 u_int, u_int32_t, int);
91 static int grackle_route_interrupt(device_t, device_t, int);
96 static int grackle_enable_config(struct grackle_softc *, u_int,
98 static void grackle_disable_config(struct grackle_softc *);
103 static device_method_t grackle_methods[] = {
104 /* Device interface */
105 DEVMETHOD(device_probe, grackle_probe),
106 DEVMETHOD(device_attach, grackle_attach),
109 DEVMETHOD(bus_print_child, bus_generic_print_child),
110 DEVMETHOD(bus_read_ivar, grackle_read_ivar),
111 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
112 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
113 DEVMETHOD(bus_alloc_resource, grackle_alloc_resource),
114 DEVMETHOD(bus_release_resource, grackle_release_resource),
115 DEVMETHOD(bus_activate_resource, grackle_activate_resource),
116 DEVMETHOD(bus_deactivate_resource, grackle_deactivate_resource),
119 DEVMETHOD(pcib_maxslots, grackle_maxslots),
120 DEVMETHOD(pcib_read_config, grackle_read_config),
121 DEVMETHOD(pcib_write_config, grackle_write_config),
122 DEVMETHOD(pcib_route_interrupt, grackle_route_interrupt),
127 static driver_t grackle_driver = {
130 sizeof(struct grackle_softc)
133 static devclass_t grackle_devclass;
135 DRIVER_MODULE(grackle, nexus, grackle_driver, grackle_devclass, 0, 0);
138 grackle_probe(device_t dev)
140 char *type, *compatible;
142 type = nexus_get_device_type(dev);
143 compatible = nexus_get_compatible(dev);
145 if (type == NULL || compatible == NULL)
148 if (strcmp(type, "pci") != 0 || strcmp(compatible, "grackle") != 0)
151 device_set_desc(dev, "MPC106 (Grackle) Host-PCI bridge");
156 grackle_attach(device_t dev)
158 struct grackle_softc *sc;
160 u_int32_t busrange[2];
161 struct grackle_range *rp, *io, *mem[2];
164 node = nexus_get_node(dev);
165 sc = device_get_softc(dev);
167 if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
172 sc->sc_bus = busrange[0];
175 * The Grackle PCI config addr/data registers are actually in
176 * PCI space, but since they are needed to actually probe the
177 * PCI bus, use the fact that they are also available directly
178 * on the processor bus and map them
180 sc->sc_addr = (vm_offset_t)pmap_mapdev(GRACKLE_ADDR, PAGE_SIZE);
181 sc->sc_data = (vm_offset_t)pmap_mapdev(GRACKLE_DATA, PAGE_SIZE);
183 bzero(sc->sc_range, sizeof(sc->sc_range));
184 sc->sc_nrange = OF_getprop(node, "ranges", sc->sc_range,
185 sizeof(sc->sc_range));
187 if (sc->sc_nrange == -1) {
188 device_printf(dev, "could not get ranges\n");
192 sc->sc_range[6].pci_hi = 0;
196 for (rp = sc->sc_range; rp->pci_hi != 0; rp++) {
197 switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
198 case OFW_PCI_PHYS_HI_SPACE_CONFIG:
200 case OFW_PCI_PHYS_HI_SPACE_IO:
203 case OFW_PCI_PHYS_HI_SPACE_MEM32:
207 case OFW_PCI_PHYS_HI_SPACE_MEM64:
213 device_printf(dev, "can't find io range\n");
216 sc->sc_io_rman.rm_type = RMAN_ARRAY;
217 sc->sc_io_rman.rm_descr = "Grackle PCI I/O Ports";
218 sc->sc_iostart = io->pci_iospace;
219 if (rman_init(&sc->sc_io_rman) != 0 ||
220 rman_manage_region(&sc->sc_io_rman, io->pci_lo,
221 io->pci_lo + io->size_lo) != 0) {
222 device_printf(dev, "failed to set up io range management\n");
227 device_printf(dev, "can't find mem ranges\n");
230 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
231 sc->sc_mem_rman.rm_descr = "Grackle PCI Memory";
232 if (rman_init(&sc->sc_mem_rman) != 0) {
234 "failed to init mem range resources\n");
237 for (i = 0; i < nmem; i++) {
238 if (rman_manage_region(&sc->sc_mem_rman, mem[i]->pci_lo,
239 mem[i]->pci_lo + mem[i]->size_lo) != 0) {
241 "failed to set up memory range management\n");
247 * Write out the correct PIC interrupt values to config space
248 * of all devices on the bus.
250 ofw_pci_fixup(dev, sc->sc_bus, sc->sc_node);
252 device_add_child(dev, "pci", device_get_unit(dev));
253 return (bus_generic_attach(dev));
257 grackle_maxslots(device_t dev)
260 return (PCI_SLOTMAX);
264 grackle_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
267 struct grackle_softc *sc;
269 u_int32_t retval = 0xffffffff;
271 sc = device_get_softc(dev);
272 caoff = sc->sc_data + (reg & 0x03);
274 if (grackle_enable_config(sc, bus, slot, func, reg) != 0) {
277 * Config probes to non-existent devices on the
278 * secondary bus generates machine checks. Be sure
282 if (badaddr((void *)sc->sc_data, 4)) {
289 retval = (in8rb(caoff));
292 retval = (in16rb(caoff));
295 retval = (in32rb(caoff));
299 grackle_disable_config(sc);
305 grackle_write_config(device_t dev, u_int bus, u_int slot, u_int func,
306 u_int reg, u_int32_t val, int width)
308 struct grackle_softc *sc;
311 sc = device_get_softc(dev);
312 caoff = sc->sc_data + (reg & 0x03);
314 if (grackle_enable_config(sc, bus, slot, func, reg)) {
330 grackle_disable_config(sc);
334 grackle_route_interrupt(device_t bus, device_t dev, int pin)
341 grackle_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
343 struct grackle_softc *sc;
345 sc = device_get_softc(dev);
349 *result = sc->sc_bus;
357 static struct resource *
358 grackle_alloc_resource(device_t bus, device_t child, int type, int *rid,
359 u_long start, u_long end, u_long count, u_int flags)
361 struct grackle_softc *sc;
367 needactivate = flags & RF_ACTIVE;
370 sc = device_get_softc(bus);
374 rm = &sc->sc_mem_rman;
375 bt = PPC_BUS_SPACE_MEM;
379 rm = &sc->sc_io_rman;
380 bt = PPC_BUS_SPACE_IO;
384 return (bus_alloc_resource(bus, type, rid, start, end, count,
389 device_printf(bus, "unknown resource request from %s\n",
390 device_get_nameunit(child));
394 rv = rman_reserve_resource(rm, start, end, count, flags, child);
396 device_printf(bus, "failed to reserve resource for %s\n",
397 device_get_nameunit(child));
401 rman_set_bustag(rv, bt);
402 rman_set_bushandle(rv, rman_get_start(rv));
405 if (bus_activate_resource(child, type, *rid, rv) != 0) {
407 "failed to activate resource for %s\n",
408 device_get_nameunit(child));
409 rman_release_resource(rv);
418 grackle_release_resource(device_t bus, device_t child, int type, int rid,
419 struct resource *res)
421 if (rman_get_flags(res) & RF_ACTIVE) {
422 int error = bus_deactivate_resource(child, type, rid, res);
427 return (rman_release_resource(res));
431 grackle_activate_resource(device_t bus, device_t child, int type, int rid,
432 struct resource *res)
434 struct grackle_softc *sc;
437 sc = device_get_softc(bus);
439 if (type == SYS_RES_IRQ) {
440 return (bus_activate_resource(bus, type, rid, res));
442 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
445 start = (vm_offset_t)rman_get_start(res);
447 * For i/o-ports, convert the start address to the
448 * MPC106 PCI i/o window
450 if (type == SYS_RES_IOPORT)
451 start += sc->sc_iostart;
454 printf("grackle mapdev: start %x, len %ld\n", start,
457 p = pmap_mapdev(start, (vm_size_t)rman_get_size(res));
461 rman_set_virtual(res, p);
462 rman_set_bushandle(res, (u_long)p);
465 return (rman_activate_resource(res));
469 grackle_deactivate_resource(device_t bus, device_t child, int type, int rid,
470 struct resource *res)
473 * If this is a memory resource, unmap it.
475 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
478 psize = rman_get_size(res);
479 pmap_unmapdev((vm_offset_t)rman_get_virtual(res), psize);
482 return (rman_deactivate_resource(res));
487 grackle_enable_config(struct grackle_softc *sc, u_int bus, u_int slot,
488 u_int func, u_int reg)
493 * Unlike UniNorth, the format of the config word is the same
494 * for local (0) and remote busses.
496 cfgval = (bus << 16) | (slot << 11) | (func << 8) | (reg & 0xFC)
497 | GRACKLE_CFG_ENABLE;
499 out32rb(sc->sc_addr, cfgval);
500 (void) in32rb(sc->sc_addr);
506 grackle_disable_config(struct grackle_softc *sc)
509 * Clear the GRACKLE_CFG_ENABLE bit to prevent stray
510 * accesses from causing config cycles
512 out32rb(sc->sc_addr, 0);
516 * Driver to swallow Grackle host bridges from the PCI bus side.
519 grackle_hb_probe(device_t dev)
522 if (pci_get_devid(dev) == 0x00021057) {
523 device_set_desc(dev, "Grackle Host to PCI bridge");
532 grackle_hb_attach(device_t dev)
538 static device_method_t grackle_hb_methods[] = {
539 /* Device interface */
540 DEVMETHOD(device_probe, grackle_hb_probe),
541 DEVMETHOD(device_attach, grackle_hb_attach),
546 static driver_t grackle_hb_driver = {
551 static devclass_t grackle_hb_devclass;
553 DRIVER_MODULE(grackle_hb, pci, grackle_hb_driver, grackle_hb_devclass, 0, 0);