1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2013 Rui Paulo <rpaulo@FreeBSD.org> 5 * Copyright (c) 2017 Manuel Stuehn 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/poll.h> 33 #include <sys/time.h> 34 #include <sys/uio.h> 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/fcntl.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 #include <sys/malloc.h> 43 #include <sys/rman.h> 44 #include <sys/types.h> 45 #include <sys/sysctl.h> 46 #include <sys/event.h> 47 #include <sys/selinfo.h> 48 #include <machine/bus.h> 49 #include <machine/cpu.h> 50 #include <machine/frame.h> 51 #include <machine/intr.h> 52 #include <machine/atomic.h> 53 54 #include <dev/ofw/openfirm.h> 55 #include <dev/ofw/ofw_bus.h> 56 #include <dev/ofw/ofw_bus_subr.h> 57 58 #include <arm/ti/ti_prcm.h> 59 #include <arm/ti/ti_pruss.h> 60 61 #ifdef DEBUG 62 #define DPRINTF(fmt, ...) do { \ 63 printf("%s: ", __func__); \ 64 printf(fmt, __VA_ARGS__); \ 65 } while (0) 66 #else 67 #define DPRINTF(fmt, ...) 68 #endif 69 70 static d_open_t ti_pruss_irq_open; 71 static d_read_t ti_pruss_irq_read; 72 static d_poll_t ti_pruss_irq_poll; 73 74 static device_probe_t ti_pruss_probe; 75 static device_attach_t ti_pruss_attach; 76 static device_detach_t ti_pruss_detach; 77 static void ti_pruss_intr(void *); 78 static d_open_t ti_pruss_open; 79 static d_mmap_t ti_pruss_mmap; 80 static void ti_pruss_irq_kqread_detach(struct knote *); 81 static int ti_pruss_irq_kqevent(struct knote *, long); 82 static d_kqfilter_t ti_pruss_irq_kqfilter; 83 static void ti_pruss_privdtor(void *data); 84 85 #define TI_PRUSS_PRU_IRQS 2 86 #define TI_PRUSS_HOST_IRQS 8 87 #define TI_PRUSS_IRQS (TI_PRUSS_HOST_IRQS+TI_PRUSS_PRU_IRQS) 88 #define TI_PRUSS_EVENTS 64 89 #define NOT_SET_STR "NONE" 90 #define TI_TS_ARRAY 16 91 92 struct ctl 93 { 94 size_t cnt; 95 size_t idx; 96 }; 97 98 struct ts_ring_buf 99 { 100 struct ctl ctl; 101 uint64_t ts[TI_TS_ARRAY]; 102 }; 103 104 struct ti_pruss_irqsc 105 { 106 struct mtx sc_mtx; 107 struct cdev *sc_pdev; 108 struct selinfo sc_selinfo; 109 int8_t channel; 110 int8_t last; 111 int8_t event; 112 bool enable; 113 struct ts_ring_buf tstamps; 114 }; 115 116 static struct cdevsw ti_pruss_cdevirq = { 117 .d_version = D_VERSION, 118 .d_name = "ti_pruss_irq", 119 .d_open = ti_pruss_irq_open, 120 .d_read = ti_pruss_irq_read, 121 .d_poll = ti_pruss_irq_poll, 122 .d_kqfilter = ti_pruss_irq_kqfilter, 123 }; 124 125 struct ti_pruss_softc { 126 struct mtx sc_mtx; 127 struct resource *sc_mem_res; 128 struct resource *sc_irq_res[TI_PRUSS_HOST_IRQS]; 129 void *sc_intr[TI_PRUSS_HOST_IRQS]; 130 struct ti_pruss_irqsc sc_irq_devs[TI_PRUSS_IRQS]; 131 bus_space_tag_t sc_bt; 132 bus_space_handle_t sc_bh; 133 struct cdev *sc_pdev; 134 struct selinfo sc_selinfo; 135 bool sc_glob_irqen; 136 }; 137 138 static struct cdevsw ti_pruss_cdevsw = { 139 .d_version = D_VERSION, 140 .d_name = "ti_pruss", 141 .d_open = ti_pruss_open, 142 .d_mmap = ti_pruss_mmap, 143 }; 144 145 static device_method_t ti_pruss_methods[] = { 146 DEVMETHOD(device_probe, ti_pruss_probe), 147 DEVMETHOD(device_attach, ti_pruss_attach), 148 DEVMETHOD(device_detach, ti_pruss_detach), 149 150 DEVMETHOD_END 151 }; 152 153 static driver_t ti_pruss_driver = { 154 "ti_pruss", 155 ti_pruss_methods, 156 sizeof(struct ti_pruss_softc) 157 }; 158 159 static devclass_t ti_pruss_devclass; 160 161 DRIVER_MODULE(ti_pruss, simplebus, ti_pruss_driver, ti_pruss_devclass, 0, 0); 162 MODULE_DEPEND(ti_pruss, ti_prcm, 1, 1, 1); 163 164 static struct resource_spec ti_pruss_irq_spec[] = { 165 { SYS_RES_IRQ, 0, RF_ACTIVE }, 166 { SYS_RES_IRQ, 1, RF_ACTIVE }, 167 { SYS_RES_IRQ, 2, RF_ACTIVE }, 168 { SYS_RES_IRQ, 3, RF_ACTIVE }, 169 { SYS_RES_IRQ, 4, RF_ACTIVE }, 170 { SYS_RES_IRQ, 5, RF_ACTIVE }, 171 { SYS_RES_IRQ, 6, RF_ACTIVE }, 172 { SYS_RES_IRQ, 7, RF_ACTIVE }, 173 { -1, 0, 0 } 174 }; 175 CTASSERT(TI_PRUSS_HOST_IRQS == nitems(ti_pruss_irq_spec) - 1); 176 177 static int 178 ti_pruss_irq_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 179 { 180 struct ctl* irqs; 181 struct ti_pruss_irqsc *sc; 182 sc = dev->si_drv1; 183 184 irqs = malloc(sizeof(struct ctl), M_DEVBUF, M_WAITOK); 185 if (!irqs) 186 return (ENOMEM); 187 188 irqs->cnt = sc->tstamps.ctl.cnt; 189 irqs->idx = sc->tstamps.ctl.idx; 190 191 return devfs_set_cdevpriv(irqs, ti_pruss_privdtor); 192 } 193 194 static void 195 ti_pruss_privdtor(void *data) 196 { 197 free(data, M_DEVBUF); 198 } 199 200 static int 201 ti_pruss_irq_poll(struct cdev *dev, int events, struct thread *td) 202 { 203 struct ctl* irqs; 204 struct ti_pruss_irqsc *sc; 205 sc = dev->si_drv1; 206 207 devfs_get_cdevpriv((void**)&irqs); 208 209 if (events & (POLLIN | POLLRDNORM)) { 210 if (sc->tstamps.ctl.cnt != irqs->cnt) 211 return events & (POLLIN | POLLRDNORM); 212 else 213 selrecord(td, &sc->sc_selinfo); 214 } 215 return 0; 216 } 217 218 static int 219 ti_pruss_irq_read(struct cdev *cdev, struct uio *uio, int ioflag) 220 { 221 const size_t ts_len = sizeof(uint64_t); 222 struct ti_pruss_irqsc* irq; 223 struct ctl* priv; 224 int error = 0; 225 size_t idx; 226 ssize_t level; 227 228 irq = cdev->si_drv1; 229 230 if (uio->uio_resid < ts_len) 231 return (EINVAL); 232 233 error = devfs_get_cdevpriv((void**)&priv); 234 if (error) 235 return (error); 236 237 mtx_lock(&irq->sc_mtx); 238 239 if (irq->tstamps.ctl.cnt - priv->cnt > TI_TS_ARRAY) 240 { 241 priv->cnt = irq->tstamps.ctl.cnt; 242 priv->idx = irq->tstamps.ctl.idx; 243 mtx_unlock(&irq->sc_mtx); 244 return (ENXIO); 245 } 246 247 do { 248 idx = priv->idx; 249 level = irq->tstamps.ctl.idx - idx; 250 if (level < 0) 251 level += TI_TS_ARRAY; 252 253 if (level == 0) { 254 if (ioflag & O_NONBLOCK) { 255 mtx_unlock(&irq->sc_mtx); 256 return (EWOULDBLOCK); 257 } 258 259 error = msleep(irq, &irq->sc_mtx, PCATCH | PDROP, 260 "pruirq", 0); 261 if (error) 262 return error; 263 264 mtx_lock(&irq->sc_mtx); 265 } 266 }while(level == 0); 267 268 mtx_unlock(&irq->sc_mtx); 269 270 error = uiomove(&irq->tstamps.ts[idx], ts_len, uio); 271 272 if (++idx == TI_TS_ARRAY) 273 idx = 0; 274 priv->idx = idx; 275 276 atomic_add_32(&priv->cnt, 1); 277 278 return (error); 279 } 280 281 static struct ti_pruss_irq_arg { 282 int irq; 283 struct ti_pruss_softc *sc; 284 } ti_pruss_irq_args[TI_PRUSS_IRQS]; 285 286 static __inline uint32_t 287 ti_pruss_reg_read(struct ti_pruss_softc *sc, uint32_t reg) 288 { 289 return (bus_space_read_4(sc->sc_bt, sc->sc_bh, reg)); 290 } 291 292 static __inline void 293 ti_pruss_reg_write(struct ti_pruss_softc *sc, uint32_t reg, uint32_t val) 294 { 295 bus_space_write_4(sc->sc_bt, sc->sc_bh, reg, val); 296 } 297 298 static __inline void 299 ti_pruss_interrupts_clear(struct ti_pruss_softc *sc) 300 { 301 /* disable global interrupt */ 302 ti_pruss_reg_write(sc, PRUSS_INTC_GER, 0 ); 303 304 /* clear all events */ 305 ti_pruss_reg_write(sc, PRUSS_INTC_SECR0, 0xFFFFFFFF); 306 ti_pruss_reg_write(sc, PRUSS_INTC_SECR1, 0xFFFFFFFF); 307 308 /* disable all host interrupts */ 309 ti_pruss_reg_write(sc, PRUSS_INTC_HIER, 0); 310 } 311 312 static __inline int 313 ti_pruss_interrupts_enable(struct ti_pruss_softc *sc, int8_t irq, bool enable) 314 { 315 if (enable && ((sc->sc_irq_devs[irq].channel == -1) || 316 (sc->sc_irq_devs[irq].event== -1))) 317 { 318 device_printf( sc->sc_pdev->si_drv1, 319 "Interrupt chain not fully configured, not possible to enable\n" ); 320 return (EINVAL); 321 } 322 323 sc->sc_irq_devs[irq].enable = enable; 324 325 if (sc->sc_irq_devs[irq].sc_pdev) { 326 destroy_dev(sc->sc_irq_devs[irq].sc_pdev); 327 sc->sc_irq_devs[irq].sc_pdev = NULL; 328 } 329 330 if (enable) { 331 sc->sc_irq_devs[irq].sc_pdev = make_dev(&ti_pruss_cdevirq, 0, UID_ROOT, GID_WHEEL, 332 0600, "pruss%d.irq%d", device_get_unit(sc->sc_pdev->si_drv1), irq); 333 sc->sc_irq_devs[irq].sc_pdev->si_drv1 = &sc->sc_irq_devs[irq]; 334 335 sc->sc_irq_devs[irq].tstamps.ctl.idx = 0; 336 } 337 338 uint32_t reg = enable ? PRUSS_INTC_HIEISR : PRUSS_INTC_HIDISR; 339 ti_pruss_reg_write(sc, reg, sc->sc_irq_devs[irq].channel); 340 341 reg = enable ? PRUSS_INTC_EISR : PRUSS_INTC_EICR; 342 ti_pruss_reg_write(sc, reg, sc->sc_irq_devs[irq].event ); 343 344 return (0); 345 } 346 347 static __inline void 348 ti_pruss_map_write(struct ti_pruss_softc *sc, uint32_t basereg, uint8_t index, uint8_t content) 349 { 350 const size_t regadr = basereg + index & ~0x03; 351 const size_t bitpos = (index & 0x03) * 8; 352 uint32_t rmw = ti_pruss_reg_read(sc, regadr); 353 rmw = (rmw & ~( 0xF << bitpos)) | ( (content & 0xF) << bitpos); 354 ti_pruss_reg_write(sc, regadr, rmw); 355 } 356 357 static int 358 ti_pruss_event_map( SYSCTL_HANDLER_ARGS ) 359 { 360 struct ti_pruss_softc *sc; 361 const int8_t irq = arg2; 362 int err; 363 char event[sizeof(NOT_SET_STR)]; 364 365 sc = arg1; 366 367 if(sc->sc_irq_devs[irq].event == -1) 368 bcopy(NOT_SET_STR, event, sizeof(event)); 369 else 370 snprintf(event, sizeof(event), "%d", sc->sc_irq_devs[irq].event); 371 372 err = sysctl_handle_string(oidp, event, sizeof(event), req); 373 if(err != 0) 374 return (err); 375 376 if (req->newptr) { // write event 377 if (strcmp(NOT_SET_STR, event) == 0) { 378 ti_pruss_interrupts_enable(sc, irq, false); 379 sc->sc_irq_devs[irq].event = -1; 380 } else { 381 if (sc->sc_irq_devs[irq].channel == -1) { 382 device_printf( sc->sc_pdev->si_drv1, 383 "corresponding channel not configured\n"); 384 return (ENXIO); 385 } 386 387 const int8_t channelnr = sc->sc_irq_devs[irq].channel; 388 const int8_t eventnr = strtol( event, NULL, 10 ); // TODO: check if strol is valid 389 if (eventnr > TI_PRUSS_EVENTS || eventnr < 0) { 390 device_printf( sc->sc_pdev->si_drv1, 391 "Event number %d not valid (0 - %d)", 392 channelnr, TI_PRUSS_EVENTS -1); 393 return (EINVAL); 394 } 395 396 sc->sc_irq_devs[irq].channel = channelnr; 397 sc->sc_irq_devs[irq].event = eventnr; 398 399 // event[nr] <= channel 400 ti_pruss_map_write(sc, PRUSS_INTC_CMR_BASE, 401 eventnr, channelnr); 402 } 403 } 404 return (err); 405 } 406 407 static int 408 ti_pruss_channel_map(SYSCTL_HANDLER_ARGS) 409 { 410 struct ti_pruss_softc *sc; 411 int err; 412 char channel[sizeof(NOT_SET_STR)]; 413 const int8_t irq = arg2; 414 415 sc = arg1; 416 417 if (sc->sc_irq_devs[irq].channel == -1) 418 bcopy(NOT_SET_STR, channel, sizeof(channel)); 419 else 420 snprintf(channel, sizeof(channel), "%d", sc->sc_irq_devs[irq].channel); 421 422 err = sysctl_handle_string(oidp, channel, sizeof(channel), req); 423 if (err != 0) 424 return (err); 425 426 if (req->newptr) { // write event 427 if (strcmp(NOT_SET_STR, channel) == 0) { 428 ti_pruss_interrupts_enable(sc, irq, false); 429 ti_pruss_reg_write(sc, PRUSS_INTC_HIDISR, 430 sc->sc_irq_devs[irq].channel); 431 sc->sc_irq_devs[irq].channel = -1; 432 } else { 433 const int8_t channelnr = strtol(channel, NULL, 10); // TODO: check if strol is valid 434 if (channelnr > TI_PRUSS_IRQS || channelnr < 0) 435 { 436 device_printf(sc->sc_pdev->si_drv1, 437 "Channel number %d not valid (0 - %d)", 438 channelnr, TI_PRUSS_IRQS-1); 439 return (EINVAL); 440 } 441 442 sc->sc_irq_devs[irq].channel = channelnr; 443 sc->sc_irq_devs[irq].last = -1; 444 445 // channel[nr] <= irqnr 446 ti_pruss_map_write(sc, PRUSS_INTC_HMR_BASE, 447 irq, channelnr); 448 } 449 } 450 451 return (err); 452 } 453 454 static int 455 ti_pruss_interrupt_enable(SYSCTL_HANDLER_ARGS) 456 { 457 struct ti_pruss_softc *sc; 458 int err; 459 bool irqenable; 460 const int8_t irq = arg2; 461 462 sc = arg1; 463 irqenable = sc->sc_irq_devs[arg2].enable; 464 465 err = sysctl_handle_bool(oidp, &irqenable, arg2, req); 466 if (err != 0) 467 return (err); 468 469 if (req->newptr) // write enable 470 return ti_pruss_interrupts_enable(sc, irq, irqenable); 471 472 return (err); 473 } 474 475 static int 476 ti_pruss_global_interrupt_enable(SYSCTL_HANDLER_ARGS) 477 { 478 struct ti_pruss_softc *sc; 479 int err; 480 bool glob_irqen; 481 482 sc = arg1; 483 glob_irqen = sc->sc_glob_irqen; 484 485 err = sysctl_handle_bool(oidp, &glob_irqen, arg2, req); 486 if (err != 0) 487 return (err); 488 489 if (req->newptr) { 490 sc->sc_glob_irqen = glob_irqen; 491 ti_pruss_reg_write(sc, PRUSS_INTC_GER, glob_irqen); 492 } 493 494 return (err); 495 } 496 static int 497 ti_pruss_probe(device_t dev) 498 { 499 500 if (!ofw_bus_status_okay(dev)) 501 return (ENXIO); 502 503 if (ofw_bus_is_compatible(dev, "ti,pruss-v1") || 504 ofw_bus_is_compatible(dev, "ti,pruss-v2")) { 505 device_set_desc(dev, "TI Programmable Realtime Unit Subsystem"); 506 return (BUS_PROBE_DEFAULT); 507 } 508 509 return (ENXIO); 510 } 511 512 static int 513 ti_pruss_attach(device_t dev) 514 { 515 struct ti_pruss_softc *sc; 516 int rid, i; 517 518 if (ti_prcm_clk_enable(PRUSS_CLK) != 0) { 519 device_printf(dev, "could not enable PRUSS clock\n"); 520 return (ENXIO); 521 } 522 sc = device_get_softc(dev); 523 rid = 0; 524 mtx_init(&sc->sc_mtx, "TI PRUSS", NULL, MTX_DEF); 525 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 526 RF_ACTIVE); 527 if (sc->sc_mem_res == NULL) { 528 device_printf(dev, "could not allocate memory resource\n"); 529 return (ENXIO); 530 } 531 532 struct sysctl_ctx_list *clist = device_get_sysctl_ctx(dev); 533 if (!clist) 534 return (EINVAL); 535 536 struct sysctl_oid *poid; 537 poid = device_get_sysctl_tree( dev ); 538 if (!poid) 539 return (EINVAL); 540 541 sc->sc_glob_irqen = false; 542 struct sysctl_oid *irq_root = SYSCTL_ADD_NODE(clist, SYSCTL_CHILDREN(poid), 543 OID_AUTO, "irq", CTLFLAG_RD, 0, 544 "PRUSS Host Interrupts"); 545 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(poid), OID_AUTO, 546 "global_interrupt_enable", CTLFLAG_RW | CTLTYPE_U8, 547 sc, 0, ti_pruss_global_interrupt_enable, 548 "CU", "Global interrupt enable"); 549 550 sc->sc_bt = rman_get_bustag(sc->sc_mem_res); 551 sc->sc_bh = rman_get_bushandle(sc->sc_mem_res); 552 if (bus_alloc_resources(dev, ti_pruss_irq_spec, sc->sc_irq_res) != 0) { 553 device_printf(dev, "could not allocate interrupt resource\n"); 554 ti_pruss_detach(dev); 555 return (ENXIO); 556 } 557 558 ti_pruss_interrupts_clear(sc); 559 560 for (i = 0; i < TI_PRUSS_IRQS; i++) { 561 char name[8]; 562 snprintf(name, sizeof(name), "%d", i); 563 564 struct sysctl_oid *irq_nodes = SYSCTL_ADD_NODE(clist, SYSCTL_CHILDREN(irq_root), 565 OID_AUTO, name, CTLFLAG_RD, 0, 566 "PRUSS Interrupts"); 567 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(irq_nodes), OID_AUTO, 568 "channel", CTLFLAG_RW | CTLTYPE_STRING, sc, i, ti_pruss_channel_map, 569 "A", "Channel attached to this irq"); 570 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(irq_nodes), OID_AUTO, 571 "event", CTLFLAG_RW | CTLTYPE_STRING, sc, i, ti_pruss_event_map, 572 "A", "Event attached to this irq"); 573 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(irq_nodes), OID_AUTO, 574 "enable", CTLFLAG_RW | CTLTYPE_U8, sc, i, ti_pruss_interrupt_enable, 575 "CU", "Enable/Disable interrupt"); 576 577 sc->sc_irq_devs[i].event = -1; 578 sc->sc_irq_devs[i].channel = -1; 579 sc->sc_irq_devs[i].tstamps.ctl.idx = 0; 580 581 if (i < TI_PRUSS_HOST_IRQS) { 582 ti_pruss_irq_args[i].irq = i; 583 ti_pruss_irq_args[i].sc = sc; 584 if (bus_setup_intr(dev, sc->sc_irq_res[i], 585 INTR_MPSAFE | INTR_TYPE_MISC, 586 NULL, ti_pruss_intr, &ti_pruss_irq_args[i], 587 &sc->sc_intr[i]) != 0) { 588 device_printf(dev, 589 "unable to setup the interrupt handler\n"); 590 ti_pruss_detach(dev); 591 592 return (ENXIO); 593 } 594 mtx_init(&sc->sc_irq_devs[i].sc_mtx, "TI PRUSS IRQ", NULL, MTX_DEF); 595 knlist_init_mtx(&sc->sc_irq_devs[i].sc_selinfo.si_note, &sc->sc_irq_devs[i].sc_mtx); 596 } 597 } 598 599 if (ti_pruss_reg_read(sc, PRUSS_AM33XX_INTC) == PRUSS_AM33XX_REV) 600 device_printf(dev, "AM33xx PRU-ICSS\n"); 601 602 sc->sc_pdev = make_dev(&ti_pruss_cdevsw, 0, UID_ROOT, GID_WHEEL, 603 0600, "pruss%d", device_get_unit(dev)); 604 sc->sc_pdev->si_drv1 = dev; 605 606 /* Acc. to datasheet always write 1 to polarity registers */ 607 ti_pruss_reg_write(sc, PRUSS_INTC_SIPR0, 0xFFFFFFFF); 608 ti_pruss_reg_write(sc, PRUSS_INTC_SIPR1, 0xFFFFFFFF); 609 610 /* Acc. to datasheet always write 0 to event type registers */ 611 ti_pruss_reg_write(sc, PRUSS_INTC_SITR0, 0); 612 ti_pruss_reg_write(sc, PRUSS_INTC_SITR1, 0); 613 614 return (0); 615 } 616 617 static int 618 ti_pruss_detach(device_t dev) 619 { 620 struct ti_pruss_softc *sc = device_get_softc(dev); 621 622 ti_pruss_interrupts_clear(sc); 623 624 for (int i = 0; i < TI_PRUSS_HOST_IRQS; i++) { 625 ti_pruss_interrupts_enable( sc, i, false ); 626 627 if (sc->sc_intr[i]) 628 bus_teardown_intr(dev, sc->sc_irq_res[i], sc->sc_intr[i]); 629 if (sc->sc_irq_res[i]) 630 bus_release_resource(dev, SYS_RES_IRQ, 631 rman_get_rid(sc->sc_irq_res[i]), 632 sc->sc_irq_res[i]); 633 knlist_clear(&sc->sc_irq_devs[i].sc_selinfo.si_note, 0); 634 mtx_lock(&sc->sc_irq_devs[i].sc_mtx); 635 if (!knlist_empty(&sc->sc_irq_devs[i].sc_selinfo.si_note)) 636 printf("IRQ %d KQueue not empty!\n", i ); 637 mtx_unlock(&sc->sc_irq_devs[i].sc_mtx); 638 knlist_destroy(&sc->sc_irq_devs[i].sc_selinfo.si_note); 639 mtx_destroy(&sc->sc_irq_devs[i].sc_mtx); 640 } 641 642 mtx_destroy(&sc->sc_mtx); 643 if (sc->sc_mem_res) 644 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->sc_mem_res), 645 sc->sc_mem_res); 646 if (sc->sc_pdev) 647 destroy_dev(sc->sc_pdev); 648 649 return (0); 650 } 651 652 static void 653 ti_pruss_intr(void *arg) 654 { 655 int val; 656 struct ti_pruss_irq_arg *iap = arg; 657 struct ti_pruss_softc *sc = iap->sc; 658 /* 659 * Interrupts pr1_host_intr[0:7] are mapped to 660 * Host-2 to Host-9 of PRU-ICSS IRQ-controller. 661 */ 662 const int pru_int = iap->irq + TI_PRUSS_PRU_IRQS; 663 const int pru_int_mask = (1 << pru_int); 664 const int pru_channel = sc->sc_irq_devs[pru_int].channel; 665 const int pru_event = sc->sc_irq_devs[pru_channel].event; 666 667 val = ti_pruss_reg_read(sc, PRUSS_INTC_HIER); 668 if (!(val & pru_int_mask)) 669 return; 670 671 ti_pruss_reg_write(sc, PRUSS_INTC_HIDISR, pru_int); 672 ti_pruss_reg_write(sc, PRUSS_INTC_SICR, pru_event); 673 ti_pruss_reg_write(sc, PRUSS_INTC_HIEISR, pru_int); 674 675 struct ti_pruss_irqsc* irq = &sc->sc_irq_devs[pru_channel]; 676 size_t wr = irq->tstamps.ctl.idx; 677 678 struct timespec ts; 679 nanouptime(&ts); 680 irq->tstamps.ts[wr] = ts.tv_sec * 1000000000 + ts.tv_nsec; 681 682 if (++wr == TI_TS_ARRAY) 683 wr = 0; 684 atomic_add_32(&irq->tstamps.ctl.cnt, 1); 685 686 irq->tstamps.ctl.idx = wr; 687 688 KNOTE_UNLOCKED(&irq->sc_selinfo.si_note, pru_int); 689 wakeup(irq); 690 selwakeup(&irq->sc_selinfo); 691 } 692 693 static int 694 ti_pruss_open(struct cdev *cdev __unused, int oflags __unused, 695 int devtype __unused, struct thread *td __unused) 696 { 697 return (0); 698 } 699 700 static int 701 ti_pruss_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_paddr_t *paddr, 702 int nprot, vm_memattr_t *memattr) 703 { 704 device_t dev = cdev->si_drv1; 705 struct ti_pruss_softc *sc = device_get_softc(dev); 706 707 if (offset >= rman_get_size(sc->sc_mem_res)) 708 return (ENOSPC); 709 *paddr = rman_get_start(sc->sc_mem_res) + offset; 710 *memattr = VM_MEMATTR_UNCACHEABLE; 711 712 return (0); 713 } 714 715 static struct filterops ti_pruss_kq_read = { 716 .f_isfd = 1, 717 .f_detach = ti_pruss_irq_kqread_detach, 718 .f_event = ti_pruss_irq_kqevent, 719 }; 720 721 static void 722 ti_pruss_irq_kqread_detach(struct knote *kn) 723 { 724 struct ti_pruss_irqsc *sc = kn->kn_hook; 725 726 knlist_remove(&sc->sc_selinfo.si_note, kn, 0); 727 } 728 729 static int 730 ti_pruss_irq_kqevent(struct knote *kn, long hint) 731 { 732 struct ti_pruss_irqsc* irq_sc; 733 int notify; 734 735 irq_sc = kn->kn_hook; 736 737 if (hint > 0) 738 kn->kn_data = hint - 2; 739 740 if (hint > 0 || irq_sc->last > 0) 741 notify = 1; 742 else 743 notify = 0; 744 745 irq_sc->last = hint; 746 747 return (notify); 748 } 749 750 static int 751 ti_pruss_irq_kqfilter(struct cdev *cdev, struct knote *kn) 752 { 753 struct ti_pruss_irqsc *sc = cdev->si_drv1; 754 755 switch (kn->kn_filter) { 756 case EVFILT_READ: 757 kn->kn_hook = sc; 758 kn->kn_fop = &ti_pruss_kq_read; 759 knlist_add(&sc->sc_selinfo.si_note, kn, 0); 760 break; 761 default: 762 return (EINVAL); 763 } 764 765 return (0); 766 } 767