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("$FreeBSD$"); 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 *); 60212413Savgstatic device_t obio_add_child(device_t, u_int, const char *, int); 61178173Simpstatic struct resource * 62294883Sjhibbits obio_alloc_resource(device_t, device_t, int, int *, rman_res_t, 63294883Sjhibbits rman_res_t, rman_res_t, 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 79202027Simpstatic void 80202027Simpobio_mask_irq(void *arg) 81178173Simp{ 82202027Simp unsigned int irq = (unsigned int)arg; 83178173Simp int ip_bit, mask, mask_register; 84178173Simp 85178173Simp /* mask IRQ */ 86178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 87178173Simp ip_bit = ICU_IP_BIT(irq); 88178173Simp 89178173Simp mask = ICU_REG_READ(mask_register); 90178173Simp ICU_REG_WRITE(mask_register, mask | ip_bit); 91178173Simp} 92178173Simp 93202027Simpstatic void 94202027Simpobio_unmask_irq(void *arg) 95178173Simp{ 96202027Simp unsigned int irq = (unsigned int)arg; 97178173Simp int ip_bit, mask, mask_register; 98178173Simp 99178173Simp /* unmask IRQ */ 100178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 101178173Simp ip_bit = ICU_IP_BIT(irq); 102178173Simp 103178173Simp mask = ICU_REG_READ(mask_register); 104178173Simp ICU_REG_WRITE(mask_register, mask & ~ip_bit); 105178173Simp} 106178173Simp 107178173Simpstatic int 108178173Simpobio_probe(device_t dev) 109178173Simp{ 110178173Simp 111257338Snwhitehorn return (BUS_PROBE_NOWILDCARD); 112178173Simp} 113178173Simp 114178173Simpstatic int 115178173Simpobio_attach(device_t dev) 116178173Simp{ 117178173Simp struct obio_softc *sc = device_get_softc(dev); 118178173Simp int rid, irq; 119178173Simp 120178173Simp sc->oba_mem_rman.rm_type = RMAN_ARRAY; 121178173Simp sc->oba_mem_rman.rm_descr = "OBIO memeory"; 122178173Simp if (rman_init(&sc->oba_mem_rman) != 0 || 123178173Simp rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START, 124178173Simp OBIO_MEM_START + OBIO_MEM_SIZE) != 0) 125178173Simp panic("obio_attach: failed to set up I/O rman"); 126178173Simp 127178173Simp sc->oba_irq_rman.rm_type = RMAN_ARRAY; 128178173Simp sc->oba_irq_rman.rm_descr = "OBIO IRQ"; 129178173Simp 130178173Simp if (rman_init(&sc->oba_irq_rman) != 0 || 131178173Simp rman_manage_region(&sc->oba_irq_rman, IRQ_BASE, IRQ_END) != 0) 132178173Simp panic("obio_attach: failed to set up IRQ rman"); 133178173Simp 134178173Simp /* Hook up our interrupt handlers. We should handle IRQ0..IRQ4*/ 135178173Simp for(irq = 0; irq < 5; irq++) { 136178173Simp if ((sc->sc_irq[irq] = bus_alloc_resource(dev, SYS_RES_IRQ, 137178173Simp &rid, irq, irq, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) { 138178173Simp device_printf(dev, "unable to allocate IRQ resource\n"); 139178173Simp return (ENXIO); 140178173Simp } 141178173Simp 142178173Simp if ((bus_setup_intr(dev, sc->sc_irq[irq], INTR_TYPE_MISC, 143178173Simp obio_intr, NULL, sc, &sc->sc_ih[irq]))) { 144178173Simp device_printf(dev, 145178173Simp "WARNING: unable to register interrupt handler\n"); 146178173Simp return (ENXIO); 147178173Simp } 148178173Simp } 149178173Simp 150178173Simp bus_generic_probe(dev); 151178173Simp bus_enumerate_hinted_children(dev); 152178173Simp bus_generic_attach(dev); 153178173Simp 154178173Simp return (0); 155178173Simp} 156178173Simp 157178173Simpstatic struct resource * 158178173Simpobio_alloc_resource(device_t bus, device_t child, int type, int *rid, 159294883Sjhibbits rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 160178173Simp{ 161178173Simp struct obio_softc *sc = device_get_softc(bus); 162178173Simp struct obio_ivar *ivar = device_get_ivars(child); 163178173Simp struct resource *rv; 164178173Simp struct resource_list_entry *rle; 165178173Simp struct rman *rm; 166178173Simp int isdefault, needactivate, passthrough; 167178173Simp 168295832Sjhibbits isdefault = (RMAN_IS_DEFAULT_RANGE(start, end)); 169178173Simp needactivate = flags & RF_ACTIVE; 170178173Simp passthrough = (device_get_parent(child) != bus); 171178173Simp rle = NULL; 172178173Simp 173178173Simp if (passthrough) 174178173Simp return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, 175178173Simp rid, start, end, count, flags)); 176178173Simp 177178173Simp /* 178178173Simp * If this is an allocation of the "default" range for a given RID, 179178173Simp * and we know what the resources for this device are (ie. they aren't 180178173Simp * maintained by a child bus), then work out the start/end values. 181178173Simp */ 182178173Simp if (isdefault) { 183178173Simp rle = resource_list_find(&ivar->resources, type, *rid); 184178173Simp if (rle == NULL) 185178173Simp return (NULL); 186178173Simp if (rle->res != NULL) { 187178173Simp panic("%s: resource entry is busy", __func__); 188178173Simp } 189178173Simp start = rle->start; 190178173Simp end = rle->end; 191178173Simp count = rle->count; 192178173Simp } 193178173Simp 194178173Simp switch (type) { 195178173Simp case SYS_RES_IRQ: 196178173Simp rm = &sc->oba_irq_rman; 197178173Simp break; 198178173Simp case SYS_RES_MEMORY: 199178173Simp rm = &sc->oba_mem_rman; 200178173Simp break; 201178173Simp default: 202178173Simp printf("%s: unknown resource type %d\n", __func__, type); 203178173Simp return (0); 204178173Simp } 205178173Simp 206178173Simp rv = rman_reserve_resource(rm, start, end, count, flags, child); 207298053Spfg if (rv == NULL) { 208178173Simp printf("%s: could not reserve resource\n", __func__); 209178173Simp return (0); 210178173Simp } 211178173Simp 212178173Simp rman_set_rid(rv, *rid); 213178173Simp 214178173Simp if (needactivate) { 215178173Simp if (bus_activate_resource(child, type, *rid, rv)) { 216178173Simp printf("%s: could not activate resource\n", __func__); 217178173Simp rman_release_resource(rv); 218178173Simp return (0); 219178173Simp } 220178173Simp } 221178173Simp 222178173Simp return (rv); 223178173Simp} 224178173Simp 225178173Simpstatic int 226178173Simpobio_activate_resource(device_t bus, device_t child, int type, int rid, 227178173Simp struct resource *r) 228178173Simp{ 229178173Simp 230178173Simp /* XXX: should we mask/unmask IRQ here? */ 231178173Simp return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child, 232178173Simp type, rid, r)); 233178173Simp} 234178173Simp 235178173Simpstatic int 236178173Simpobio_deactivate_resource(device_t bus, device_t child, int type, int rid, 237178173Simp struct resource *r) 238178173Simp{ 239178173Simp 240178173Simp /* XXX: should we mask/unmask IRQ here? */ 241178173Simp return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus), child, 242178173Simp type, rid, r)); 243178173Simp} 244178173Simp 245178173Simpstatic int 246178173Simpobio_release_resource(device_t dev, device_t child, int type, 247178173Simp int rid, struct resource *r) 248178173Simp{ 249178173Simp struct resource_list *rl; 250178173Simp struct resource_list_entry *rle; 251178173Simp 252178173Simp rl = obio_get_resource_list(dev, child); 253178173Simp if (rl == NULL) 254178173Simp return (EINVAL); 255178173Simp rle = resource_list_find(rl, type, rid); 256178173Simp if (rle == NULL) 257178173Simp return (EINVAL); 258178173Simp rman_release_resource(r); 259178173Simp rle->res = NULL; 260178173Simp 261178173Simp return (0); 262178173Simp} 263178173Simp 264178173Simpstatic int 265178173Simpobio_setup_intr(device_t dev, device_t child, struct resource *ires, 266178173Simp int flags, driver_filter_t *filt, driver_intr_t *handler, 267178173Simp void *arg, void **cookiep) 268178173Simp{ 269178173Simp struct obio_softc *sc = device_get_softc(dev); 270178173Simp struct intr_event *event; 271178173Simp int irq, ip_bit, error, mask, mask_register; 272178173Simp 273178173Simp irq = rman_get_start(ires); 274178173Simp 275178173Simp if (irq >= NIRQS) 276178173Simp panic("%s: bad irq %d", __func__, irq); 277178173Simp 278178173Simp event = sc->sc_eventstab[irq]; 279178173Simp if (event == NULL) { 280183173Simp error = intr_event_create(&event, (void *)irq, 0, irq, 281202027Simp obio_mask_irq, obio_unmask_irq, 282178173Simp NULL, NULL, 283178173Simp "obio intr%d:", irq); 284178173Simp 285178173Simp sc->sc_eventstab[irq] = event; 286178173Simp } 287178173Simp 288178173Simp intr_event_add_handler(event, device_get_nameunit(child), filt, 289178173Simp handler, arg, intr_priority(flags), flags, cookiep); 290178173Simp 291178173Simp /* unmask IRQ */ 292178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 293178173Simp ip_bit = ICU_IP_BIT(irq); 294178173Simp 295178173Simp mask = ICU_REG_READ(mask_register); 296178173Simp ICU_REG_WRITE(mask_register, mask & ~ip_bit); 297178173Simp 298178173Simp return (0); 299178173Simp} 300178173Simp 301178173Simpstatic int 302178173Simpobio_teardown_intr(device_t dev, device_t child, struct resource *ires, 303178173Simp void *cookie) 304178173Simp{ 305178173Simp struct obio_softc *sc = device_get_softc(dev); 306178173Simp int irq, result; 307178173Simp uint32_t mask_register, mask, ip_bit; 308178173Simp 309178173Simp irq = rman_get_start(ires); 310178173Simp if (irq >= NIRQS) 311178173Simp panic("%s: bad irq %d", __func__, irq); 312178173Simp 313178173Simp if (sc->sc_eventstab[irq] == NULL) 314178173Simp panic("Trying to teardown unoccupied IRQ"); 315178173Simp 316178173Simp /* mask IRQ */ 317178173Simp mask_register = ICU_IRQ_MASK_REG(irq); 318178173Simp ip_bit = ICU_IP_BIT(irq); 319178173Simp 320178173Simp mask = ICU_REG_READ(mask_register); 321178173Simp ICU_REG_WRITE(mask_register, mask | ip_bit); 322178173Simp 323178173Simp result = intr_event_remove_handler(cookie); 324178173Simp if (!result) 325178173Simp sc->sc_eventstab[irq] = NULL; 326178173Simp 327178173Simp return (result); 328178173Simp} 329178173Simp 330178173Simpstatic int 331178173Simpobio_intr(void *arg) 332178173Simp{ 333178173Simp struct obio_softc *sc = arg; 334178173Simp struct intr_event *event; 335178173Simp uint32_t irqstat, ipend, imask, xpend; 336183173Simp int irq, thread, group, i; 337178173Simp 338178173Simp irqstat = 0; 339178173Simp irq = 0; 340178173Simp for (group = 2; group <= 6; group++) { 341178173Simp ipend = ICU_REG_READ(ICU_GROUP_IPEND_REG(group)); 342178173Simp imask = ICU_REG_READ(ICU_GROUP_MASK_REG(group)); 343178173Simp xpend = ipend; 344178173Simp ipend &= ~imask; 345178173Simp 346178173Simp while ((i = fls(xpend)) != 0) { 347178173Simp xpend &= ~(1 << (i - 1)); 348178173Simp irq = IP_IRQ(group, i - 1); 349178173Simp } 350178173Simp 351178173Simp while ((i = fls(ipend)) != 0) { 352178173Simp ipend &= ~(1 << (i - 1)); 353178173Simp irq = IP_IRQ(group, i - 1); 354178173Simp event = sc->sc_eventstab[irq]; 355178173Simp thread = 0; 356178173Simp if (!event || TAILQ_EMPTY(&event->ie_handlers)) { 357183173Simp /* TODO: Log stray IRQs */ 358178173Simp continue; 359178173Simp } 360178173Simp 361178173Simp /* TODO: frame instead of NULL? */ 362178173Simp intr_event_handle(event, NULL); 363178173Simp /* XXX: Log stray IRQs */ 364178173Simp } 365178173Simp } 366178173Simp#if 0 367178173Simp ipend = ICU_REG_READ(ICU_IPEND2); 368178173Simp printf("ipend2 = %08x!\n", ipend); 369178173Simp 370178173Simp ipend = ICU_REG_READ(ICU_IPEND3); 371178173Simp printf("ipend3 = %08x!\n", ipend); 372178173Simp 373178173Simp ipend = ICU_REG_READ(ICU_IPEND4); 374178173Simp printf("ipend4 = %08x!\n", ipend); 375178173Simp ipend = ICU_REG_READ(ICU_IPEND5); 376178173Simp printf("ipend5 = %08x!\n", ipend); 377178173Simp 378178173Simp ipend = ICU_REG_READ(ICU_IPEND6); 379178173Simp printf("ipend6 = %08x!\n", ipend); 380178173Simp#endif 381178173Simp while (irqstat != 0) { 382178173Simp if ((irqstat & 1) == 1) { 383178173Simp } 384178173Simp 385178173Simp irq++; 386178173Simp irqstat >>= 1; 387178173Simp } 388178173Simp 389178173Simp return (FILTER_HANDLED); 390178173Simp} 391178173Simp 392178173Simpstatic void 393178173Simpobio_hinted_child(device_t bus, const char *dname, int dunit) 394178173Simp{ 395178173Simp device_t child; 396178173Simp long maddr; 397178173Simp int msize; 398178173Simp int irq; 399178173Simp int result; 400178173Simp 401178173Simp child = BUS_ADD_CHILD(bus, 0, dname, dunit); 402178173Simp 403178173Simp /* 404178173Simp * Set hard-wired resources for hinted child using 405178173Simp * specific RIDs. 406178173Simp */ 407178173Simp resource_long_value(dname, dunit, "maddr", &maddr); 408178173Simp resource_int_value(dname, dunit, "msize", &msize); 409178173Simp 410178173Simp 411178173Simp result = bus_set_resource(child, SYS_RES_MEMORY, 0, 412178173Simp maddr, msize); 413178173Simp if (result != 0) 414178173Simp device_printf(bus, "warning: bus_set_resource() failed\n"); 415178173Simp 416178173Simp if (resource_int_value(dname, dunit, "irq", &irq) == 0) { 417178173Simp result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1); 418178173Simp if (result != 0) 419178173Simp device_printf(bus, 420178173Simp "warning: bus_set_resource() failed\n"); 421178173Simp } 422178173Simp} 423178173Simp 424178173Simpstatic device_t 425212413Savgobio_add_child(device_t bus, u_int order, const char *name, int unit) 426178173Simp{ 427178173Simp device_t child; 428178173Simp struct obio_ivar *ivar; 429178173Simp 430178173Simp ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO); 431178173Simp resource_list_init(&ivar->resources); 432178173Simp 433178173Simp child = device_add_child_ordered(bus, order, name, unit); 434178173Simp if (child == NULL) { 435178173Simp printf("Can't add child %s%d ordered\n", name, unit); 436178173Simp return (0); 437178173Simp } 438178173Simp 439178173Simp device_set_ivars(child, ivar); 440178173Simp 441178173Simp return (child); 442178173Simp} 443178173Simp 444178173Simp/* 445178173Simp * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource 446178173Simp * Provides pointer to resource_list for these routines 447178173Simp */ 448178173Simpstatic struct resource_list * 449178173Simpobio_get_resource_list(device_t dev, device_t child) 450178173Simp{ 451178173Simp struct obio_ivar *ivar; 452178173Simp 453178173Simp ivar = device_get_ivars(child); 454178173Simp return (&(ivar->resources)); 455178173Simp} 456178173Simp 457178173Simpstatic device_method_t obio_methods[] = { 458178173Simp DEVMETHOD(bus_activate_resource, obio_activate_resource), 459178173Simp DEVMETHOD(bus_add_child, obio_add_child), 460178173Simp DEVMETHOD(bus_alloc_resource, obio_alloc_resource), 461178173Simp DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource), 462178173Simp DEVMETHOD(bus_get_resource_list, obio_get_resource_list), 463178173Simp DEVMETHOD(bus_hinted_child, obio_hinted_child), 464178173Simp DEVMETHOD(bus_release_resource, obio_release_resource), 465178173Simp DEVMETHOD(bus_setup_intr, obio_setup_intr), 466178173Simp DEVMETHOD(bus_teardown_intr, obio_teardown_intr), 467178173Simp DEVMETHOD(device_attach, obio_attach), 468178173Simp DEVMETHOD(device_probe, obio_probe), 469178173Simp DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 470178173Simp DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 471178173Simp 472178173Simp {0, 0}, 473178173Simp}; 474178173Simp 475178173Simpstatic driver_t obio_driver = { 476178173Simp "obio", 477178173Simp obio_methods, 478178173Simp sizeof(struct obio_softc), 479178173Simp}; 480178173Simpstatic devclass_t obio_devclass; 481178173Simp 482178173SimpDRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0); 483