obio.c revision 182901
1178173Simp/*- 2178173Simp * Copyright (c) 2007, Oleksandr Tymoshenko <gonzo@freebsd.org> 3178173Simp * 4178173Simp * Redistribution and use in source and binary forms, with or without 5178173Simp * modification, are permitted provided that the following conditions 6178173Simp * are met: 7178173Simp * 1. Redistributions of source code must retain the above copyright 8178173Simp * notice, this list of conditions and the following disclaimer. 9178173Simp * 2. Redistributions in binary form must reproduce the above copyright 10178173Simp * notice, this list of conditions and the following disclaimer in the 11178173Simp * documentation and/or other materials provided with the distribution. 12178173Simp * 3. All advertising materials mentioning features or use of this software 13178173Simp * must display the following acknowledgement: 14178173Simp * This product includes software developed for the NetBSD Project by 15178173Simp * Wasabi Systems, Inc. 16178173Simp * 4. The name of Wasabi Systems, Inc. may not be used to endorse 17178173Simp * or promote products derived from this software without specific prior 18178173Simp * written permission. 19178173Simp * 20178173Simp * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 21178173Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22178173Simp * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23178173Simp * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 24178173Simp * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25178173Simp * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26178173Simp * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27178173Simp * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28178173Simp * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29178173Simp * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30178173Simp * POSSIBILITY OF SUCH DAMAGE. 31178173Simp */ 32178173Simp 33178173Simp#include <sys/cdefs.h> 34178173Simp__FBSDID("$FreeBSD: head/sys/mips/idt/obio.c 182901 2008-09-10 03:49:08Z gonzo $"); 35178173Simp 36178173Simp#include <sys/param.h> 37178173Simp#include <sys/systm.h> 38178173Simp#include <sys/bus.h> 39178173Simp#include <sys/interrupt.h> 40178173Simp#include <sys/kernel.h> 41178173Simp#include <sys/module.h> 42178173Simp#include <sys/rman.h> 43178173Simp#include <sys/malloc.h> 44178173Simp 45178173Simp#include <machine/bus.h> 46178173Simp 47182901Sgonzo#include <mips/idt/idtreg.h> 48182901Sgonzo#include <mips/idt/obiovar.h> 49178173Simp 50178173Simp#define ICU_REG_READ(o) \ 51178173Simp *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_ICU + (o))) 52178173Simp#define ICU_REG_WRITE(o,v) (ICU_REG_READ(o)) = (v) 53178173Simp 54178173Simp#define GPIO_REG_READ(o) \ 55178173Simp *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_GPIO + (o))) 56178173Simp#define GPIO_REG_WRITE(o,v) (GPIO_REG_READ(o)) = (v) 57178173Simp 58178173Simpstatic int obio_activate_resource(device_t, device_t, int, int, 59178173Simp struct resource *); 60178173Simpstatic device_t obio_add_child(device_t, int, const char *, int); 61178173Simpstatic struct resource * 62178173Simp obio_alloc_resource(device_t, device_t, int, int *, u_long, 63178173Simp u_long, u_long, u_int); 64178173Simpstatic int obio_attach(device_t); 65178173Simpstatic int obio_deactivate_resource(device_t, device_t, int, int, 66178173Simp struct resource *); 67178173Simpstatic struct resource_list * 68178173Simp obio_get_resource_list(device_t, device_t); 69178173Simpstatic void obio_hinted_child(device_t, const char *, int); 70178173Simpstatic int obio_intr(void *); 71178173Simpstatic int obio_probe(device_t); 72178173Simpstatic int obio_release_resource(device_t, device_t, int, int, 73178173Simp struct resource *); 74178173Simpstatic int obio_setup_intr(device_t, device_t, struct resource *, int, 75178173Simp driver_filter_t *, driver_intr_t *, void *, void **); 76178173Simpstatic int obio_teardown_intr(device_t, device_t, struct resource *, 77178173Simp void *); 78178173Simp 79178173Simpstatic void obio_mask_irq(unsigned int irq) 80178173Simp{ 81178173Simp int ip_bit, mask, mask_register; 82178173Simp 83178173Simp /* mask IRQ */ 84178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 85178173Simp ip_bit = ICU_IP_BIT(irq); 86178173Simp 87178173Simp mask = ICU_REG_READ(mask_register); 88178173Simp ICU_REG_WRITE(mask_register, mask | ip_bit); 89178173Simp} 90178173Simp 91178173Simpstatic void obio_unmask_irq(unsigned int irq) 92178173Simp{ 93178173Simp int ip_bit, mask, mask_register; 94178173Simp 95178173Simp /* unmask IRQ */ 96178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 97178173Simp ip_bit = ICU_IP_BIT(irq); 98178173Simp 99178173Simp mask = ICU_REG_READ(mask_register); 100178173Simp ICU_REG_WRITE(mask_register, mask & ~ip_bit); 101178173Simp} 102178173Simp 103178173Simpstatic int 104178173Simpobio_probe(device_t dev) 105178173Simp{ 106178173Simp 107178173Simp return (0); 108178173Simp} 109178173Simp 110178173Simpstatic int 111178173Simpobio_attach(device_t dev) 112178173Simp{ 113178173Simp struct obio_softc *sc = device_get_softc(dev); 114178173Simp int rid, irq; 115178173Simp 116178173Simp sc->oba_mem_rman.rm_type = RMAN_ARRAY; 117178173Simp sc->oba_mem_rman.rm_descr = "OBIO memeory"; 118178173Simp if (rman_init(&sc->oba_mem_rman) != 0 || 119178173Simp rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START, 120178173Simp OBIO_MEM_START + OBIO_MEM_SIZE) != 0) 121178173Simp panic("obio_attach: failed to set up I/O rman"); 122178173Simp 123178173Simp sc->oba_irq_rman.rm_type = RMAN_ARRAY; 124178173Simp sc->oba_irq_rman.rm_descr = "OBIO IRQ"; 125178173Simp 126178173Simp if (rman_init(&sc->oba_irq_rman) != 0 || 127178173Simp rman_manage_region(&sc->oba_irq_rman, IRQ_BASE, IRQ_END) != 0) 128178173Simp panic("obio_attach: failed to set up IRQ rman"); 129178173Simp 130178173Simp /* Hook up our interrupt handlers. We should handle IRQ0..IRQ4*/ 131178173Simp for(irq = 0; irq < 5; irq++) { 132178173Simp if ((sc->sc_irq[irq] = bus_alloc_resource(dev, SYS_RES_IRQ, 133178173Simp &rid, irq, irq, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) { 134178173Simp device_printf(dev, "unable to allocate IRQ resource\n"); 135178173Simp return (ENXIO); 136178173Simp } 137178173Simp 138178173Simp if ((bus_setup_intr(dev, sc->sc_irq[irq], INTR_TYPE_MISC, 139178173Simp obio_intr, NULL, sc, &sc->sc_ih[irq]))) { 140178173Simp device_printf(dev, 141178173Simp "WARNING: unable to register interrupt handler\n"); 142178173Simp return (ENXIO); 143178173Simp } 144178173Simp } 145178173Simp 146178173Simp bus_generic_probe(dev); 147178173Simp bus_enumerate_hinted_children(dev); 148178173Simp bus_generic_attach(dev); 149178173Simp 150178173Simp return (0); 151178173Simp} 152178173Simp 153178173Simpstatic struct resource * 154178173Simpobio_alloc_resource(device_t bus, device_t child, int type, int *rid, 155178173Simp u_long start, u_long end, u_long count, u_int flags) 156178173Simp{ 157178173Simp struct obio_softc *sc = device_get_softc(bus); 158178173Simp struct obio_ivar *ivar = device_get_ivars(child); 159178173Simp struct resource *rv; 160178173Simp struct resource_list_entry *rle; 161178173Simp struct rman *rm; 162178173Simp int isdefault, needactivate, passthrough; 163178173Simp 164178173Simp isdefault = (start == 0UL && end == ~0UL); 165178173Simp needactivate = flags & RF_ACTIVE; 166178173Simp passthrough = (device_get_parent(child) != bus); 167178173Simp rle = NULL; 168178173Simp 169178173Simp if (passthrough) 170178173Simp return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, 171178173Simp rid, start, end, count, flags)); 172178173Simp 173178173Simp /* 174178173Simp * If this is an allocation of the "default" range for a given RID, 175178173Simp * and we know what the resources for this device are (ie. they aren't 176178173Simp * maintained by a child bus), then work out the start/end values. 177178173Simp */ 178178173Simp if (isdefault) { 179178173Simp rle = resource_list_find(&ivar->resources, type, *rid); 180178173Simp if (rle == NULL) 181178173Simp return (NULL); 182178173Simp if (rle->res != NULL) { 183178173Simp panic("%s: resource entry is busy", __func__); 184178173Simp } 185178173Simp start = rle->start; 186178173Simp end = rle->end; 187178173Simp count = rle->count; 188178173Simp } 189178173Simp 190178173Simp switch (type) { 191178173Simp case SYS_RES_IRQ: 192178173Simp rm = &sc->oba_irq_rman; 193178173Simp break; 194178173Simp case SYS_RES_MEMORY: 195178173Simp rm = &sc->oba_mem_rman; 196178173Simp break; 197178173Simp default: 198178173Simp printf("%s: unknown resource type %d\n", __func__, type); 199178173Simp return (0); 200178173Simp } 201178173Simp 202178173Simp rv = rman_reserve_resource(rm, start, end, count, flags, child); 203178173Simp if (rv == 0) { 204178173Simp printf("%s: could not reserve resource\n", __func__); 205178173Simp return (0); 206178173Simp } 207178173Simp 208178173Simp rman_set_rid(rv, *rid); 209178173Simp 210178173Simp if (needactivate) { 211178173Simp if (bus_activate_resource(child, type, *rid, rv)) { 212178173Simp printf("%s: could not activate resource\n", __func__); 213178173Simp rman_release_resource(rv); 214178173Simp return (0); 215178173Simp } 216178173Simp } 217178173Simp 218178173Simp return (rv); 219178173Simp} 220178173Simp 221178173Simpstatic int 222178173Simpobio_activate_resource(device_t bus, device_t child, int type, int rid, 223178173Simp struct resource *r) 224178173Simp{ 225178173Simp 226178173Simp /* XXX: should we mask/unmask IRQ here? */ 227178173Simp return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child, 228178173Simp type, rid, r)); 229178173Simp} 230178173Simp 231178173Simpstatic int 232178173Simpobio_deactivate_resource(device_t bus, device_t child, int type, int rid, 233178173Simp struct resource *r) 234178173Simp{ 235178173Simp 236178173Simp /* XXX: should we mask/unmask IRQ here? */ 237178173Simp return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus), child, 238178173Simp type, rid, r)); 239178173Simp} 240178173Simp 241178173Simpstatic int 242178173Simpobio_release_resource(device_t dev, device_t child, int type, 243178173Simp int rid, struct resource *r) 244178173Simp{ 245178173Simp struct resource_list *rl; 246178173Simp struct resource_list_entry *rle; 247178173Simp 248178173Simp rl = obio_get_resource_list(dev, child); 249178173Simp if (rl == NULL) 250178173Simp return (EINVAL); 251178173Simp rle = resource_list_find(rl, type, rid); 252178173Simp if (rle == NULL) 253178173Simp return (EINVAL); 254178173Simp rman_release_resource(r); 255178173Simp rle->res = NULL; 256178173Simp 257178173Simp return (0); 258178173Simp} 259178173Simp 260178173Simpstatic int 261178173Simpobio_setup_intr(device_t dev, device_t child, struct resource *ires, 262178173Simp int flags, driver_filter_t *filt, driver_intr_t *handler, 263178173Simp void *arg, void **cookiep) 264178173Simp{ 265178173Simp struct obio_softc *sc = device_get_softc(dev); 266178173Simp struct intr_event *event; 267178173Simp int irq, ip_bit, error, mask, mask_register; 268178173Simp 269178173Simp irq = rman_get_start(ires); 270178173Simp 271178173Simp if (irq >= NIRQS) 272178173Simp panic("%s: bad irq %d", __func__, irq); 273178173Simp 274178173Simp event = sc->sc_eventstab[irq]; 275178173Simp if (event == NULL) { 276178173Simp error = intr_event_create(&event, (void *)irq, 0, 277178173Simp (mask_fn)obio_mask_irq, (mask_fn)obio_unmask_irq, 278178173Simp NULL, NULL, 279178173Simp "obio intr%d:", irq); 280178173Simp 281178173Simp sc->sc_eventstab[irq] = event; 282178173Simp } 283178173Simp 284178173Simp intr_event_add_handler(event, device_get_nameunit(child), filt, 285178173Simp handler, arg, intr_priority(flags), flags, cookiep); 286178173Simp 287178173Simp /* unmask IRQ */ 288178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 289178173Simp ip_bit = ICU_IP_BIT(irq); 290178173Simp 291178173Simp mask = ICU_REG_READ(mask_register); 292178173Simp ICU_REG_WRITE(mask_register, mask & ~ip_bit); 293178173Simp 294178173Simp return (0); 295178173Simp} 296178173Simp 297178173Simpstatic int 298178173Simpobio_teardown_intr(device_t dev, device_t child, struct resource *ires, 299178173Simp void *cookie) 300178173Simp{ 301178173Simp struct obio_softc *sc = device_get_softc(dev); 302178173Simp int irq, result; 303178173Simp uint32_t mask_register, mask, ip_bit; 304178173Simp 305178173Simp irq = rman_get_start(ires); 306178173Simp if (irq >= NIRQS) 307178173Simp panic("%s: bad irq %d", __func__, irq); 308178173Simp 309178173Simp if (sc->sc_eventstab[irq] == NULL) 310178173Simp panic("Trying to teardown unoccupied IRQ"); 311178173Simp 312178173Simp /* mask IRQ */ 313178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 314178173Simp ip_bit = ICU_IP_BIT(irq); 315178173Simp 316178173Simp mask = ICU_REG_READ(mask_register); 317178173Simp ICU_REG_WRITE(mask_register, mask | ip_bit); 318178173Simp 319178173Simp result = intr_event_remove_handler(cookie); 320178173Simp if (!result) 321178173Simp sc->sc_eventstab[irq] = NULL; 322178173Simp 323178173Simp return (result); 324178173Simp} 325178173Simp 326178173Simpstatic int 327178173Simpobio_intr(void *arg) 328178173Simp{ 329178173Simp struct obio_softc *sc = arg; 330178173Simp struct intr_event *event; 331178173Simp struct intr_handler *ih; 332178173Simp uint32_t irqstat, ipend, imask, xpend; 333178173Simp int irq, thread, group, i, ret; 334178173Simp 335178173Simp irqstat = 0; 336178173Simp irq = 0; 337178173Simp for (group = 2; group <= 6; group++) { 338178173Simp ipend = ICU_REG_READ(ICU_GROUP_IPEND_REG(group)); 339178173Simp imask = ICU_REG_READ(ICU_GROUP_MASK_REG(group)); 340178173Simp xpend = ipend; 341178173Simp ipend &= ~imask; 342178173Simp 343178173Simp while ((i = fls(xpend)) != 0) { 344178173Simp xpend &= ~(1 << (i - 1)); 345178173Simp irq = IP_IRQ(group, i - 1); 346178173Simp } 347178173Simp 348178173Simp while ((i = fls(ipend)) != 0) { 349178173Simp ipend &= ~(1 << (i - 1)); 350178173Simp irq = IP_IRQ(group, i - 1); 351178173Simp event = sc->sc_eventstab[irq]; 352178173Simp thread = 0; 353178173Simp#ifndef INTR_FILTER 354178173Simp obio_mask_irq(irq); 355178173Simp#endif 356178173Simp if (!event || TAILQ_EMPTY(&event->ie_handlers)) { 357178173Simp#ifdef INTR_FILTER 358178173Simp obio_unmask_irq(irq); 359178173Simp#endif 360178173Simp continue; 361178173Simp } 362178173Simp 363178173Simp#ifdef INTR_FILTER 364178173Simp /* TODO: frame instead of NULL? */ 365178173Simp intr_event_handle(event, NULL); 366178173Simp /* XXX: Log stray IRQs */ 367178173Simp#else 368178173Simp /* Execute fast handlers. */ 369178173Simp TAILQ_FOREACH(ih, &event->ie_handlers, 370178173Simp ih_next) { 371178173Simp if (ih->ih_filter == NULL) 372178173Simp thread = 1; 373178173Simp else 374178173Simp ret = ih->ih_filter(ih->ih_argument); 375178173Simp /* 376178173Simp * Wrapper handler special case: see 377178173Simp * intr_execute_handlers() in 378178173Simp * i386/intr_machdep.c 379178173Simp */ 380178173Simp if (!thread) { 381178173Simp if (ret == FILTER_SCHEDULE_THREAD) 382178173Simp thread = 1; 383178173Simp } 384178173Simp } 385178173Simp 386178173Simp /* Schedule thread if needed. */ 387178173Simp if (thread) 388178173Simp intr_event_schedule_thread(event); 389178173Simp else 390178173Simp obio_unmask_irq(irq); 391178173Simp } 392178173Simp } 393178173Simp#endif 394178173Simp#if 0 395178173Simp ipend = ICU_REG_READ(ICU_IPEND2); 396178173Simp printf("ipend2 = %08x!\n", ipend); 397178173Simp 398178173Simp ipend = ICU_REG_READ(ICU_IPEND3); 399178173Simp printf("ipend3 = %08x!\n", ipend); 400178173Simp 401178173Simp ipend = ICU_REG_READ(ICU_IPEND4); 402178173Simp printf("ipend4 = %08x!\n", ipend); 403178173Simp ipend = ICU_REG_READ(ICU_IPEND5); 404178173Simp printf("ipend5 = %08x!\n", ipend); 405178173Simp 406178173Simp ipend = ICU_REG_READ(ICU_IPEND6); 407178173Simp printf("ipend6 = %08x!\n", ipend); 408178173Simp#endif 409178173Simp while (irqstat != 0) { 410178173Simp if ((irqstat & 1) == 1) { 411178173Simp } 412178173Simp 413178173Simp irq++; 414178173Simp irqstat >>= 1; 415178173Simp } 416178173Simp 417178173Simp return (FILTER_HANDLED); 418178173Simp} 419178173Simp 420178173Simpstatic void 421178173Simpobio_hinted_child(device_t bus, const char *dname, int dunit) 422178173Simp{ 423178173Simp device_t child; 424178173Simp long maddr; 425178173Simp int msize; 426178173Simp int irq; 427178173Simp int result; 428178173Simp 429178173Simp child = BUS_ADD_CHILD(bus, 0, dname, dunit); 430178173Simp 431178173Simp /* 432178173Simp * Set hard-wired resources for hinted child using 433178173Simp * specific RIDs. 434178173Simp */ 435178173Simp resource_long_value(dname, dunit, "maddr", &maddr); 436178173Simp resource_int_value(dname, dunit, "msize", &msize); 437178173Simp 438178173Simp 439178173Simp result = bus_set_resource(child, SYS_RES_MEMORY, 0, 440178173Simp maddr, msize); 441178173Simp if (result != 0) 442178173Simp device_printf(bus, "warning: bus_set_resource() failed\n"); 443178173Simp 444178173Simp if (resource_int_value(dname, dunit, "irq", &irq) == 0) { 445178173Simp result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1); 446178173Simp if (result != 0) 447178173Simp device_printf(bus, 448178173Simp "warning: bus_set_resource() failed\n"); 449178173Simp } 450178173Simp} 451178173Simp 452178173Simpstatic device_t 453178173Simpobio_add_child(device_t bus, int order, const char *name, int unit) 454178173Simp{ 455178173Simp device_t child; 456178173Simp struct obio_ivar *ivar; 457178173Simp 458178173Simp ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO); 459178173Simp if (ivar == NULL) { 460178173Simp printf("Failed to allocate ivar\n"); 461178173Simp return (0); 462178173Simp } 463178173Simp resource_list_init(&ivar->resources); 464178173Simp 465178173Simp child = device_add_child_ordered(bus, order, name, unit); 466178173Simp if (child == NULL) { 467178173Simp printf("Can't add child %s%d ordered\n", name, unit); 468178173Simp return (0); 469178173Simp } 470178173Simp 471178173Simp device_set_ivars(child, ivar); 472178173Simp 473178173Simp return (child); 474178173Simp} 475178173Simp 476178173Simp/* 477178173Simp * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource 478178173Simp * Provides pointer to resource_list for these routines 479178173Simp */ 480178173Simpstatic struct resource_list * 481178173Simpobio_get_resource_list(device_t dev, device_t child) 482178173Simp{ 483178173Simp struct obio_ivar *ivar; 484178173Simp 485178173Simp ivar = device_get_ivars(child); 486178173Simp return (&(ivar->resources)); 487178173Simp} 488178173Simp 489178173Simpstatic device_method_t obio_methods[] = { 490178173Simp DEVMETHOD(bus_activate_resource, obio_activate_resource), 491178173Simp DEVMETHOD(bus_add_child, obio_add_child), 492178173Simp DEVMETHOD(bus_alloc_resource, obio_alloc_resource), 493178173Simp DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource), 494178173Simp DEVMETHOD(bus_get_resource_list, obio_get_resource_list), 495178173Simp DEVMETHOD(bus_hinted_child, obio_hinted_child), 496178173Simp DEVMETHOD(bus_release_resource, obio_release_resource), 497178173Simp DEVMETHOD(bus_setup_intr, obio_setup_intr), 498178173Simp DEVMETHOD(bus_teardown_intr, obio_teardown_intr), 499178173Simp DEVMETHOD(device_attach, obio_attach), 500178173Simp DEVMETHOD(device_probe, obio_probe), 501178173Simp DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 502178173Simp DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 503178173Simp 504178173Simp {0, 0}, 505178173Simp}; 506178173Simp 507178173Simpstatic driver_t obio_driver = { 508178173Simp "obio", 509178173Simp obio_methods, 510178173Simp sizeof(struct obio_softc), 511178173Simp}; 512178173Simpstatic devclass_t obio_devclass; 513178173Simp 514178173SimpDRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0); 515