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/lock.h> 42 #include <sys/module.h> 43 #include <sys/malloc.h> 44 #include <sys/mutex.h> 45 #include <sys/rman.h> 46 #include <sys/types.h> 47 #include <sys/sysctl.h> 48 #include <sys/event.h> 49 #include <sys/selinfo.h> 50 #include <machine/bus.h> 51 #include <machine/cpu.h> 52 #include <machine/frame.h> 53 #include <machine/intr.h> 54 #include <machine/atomic.h> 55 56 #include <dev/ofw/openfirm.h> 57 #include <dev/ofw/ofw_bus.h> 58 #include <dev/ofw/ofw_bus_subr.h> 59 60 #include <dev/extres/clk/clk.h> 61 62 #include <arm/ti/ti_sysc.h> 63 #include <arm/ti/ti_pruss.h> 64 #include <arm/ti/ti_prm.h> 65 66 #ifdef DEBUG 67 #define DPRINTF(fmt, ...) do { \ 68 printf("%s: ", __func__); \ 69 printf(fmt, __VA_ARGS__); \ 70 } while (0) 71 #else 72 #define DPRINTF(fmt, ...) 73 #endif 74 75 static d_open_t ti_pruss_irq_open; 76 static d_read_t ti_pruss_irq_read; 77 static d_poll_t ti_pruss_irq_poll; 78 79 static device_probe_t ti_pruss_probe; 80 static device_attach_t ti_pruss_attach; 81 static device_detach_t ti_pruss_detach; 82 static void ti_pruss_intr(void *); 83 static d_open_t ti_pruss_open; 84 static d_mmap_t ti_pruss_mmap; 85 static void ti_pruss_irq_kqread_detach(struct knote *); 86 static int ti_pruss_irq_kqevent(struct knote *, long); 87 static d_kqfilter_t ti_pruss_irq_kqfilter; 88 static void ti_pruss_privdtor(void *data); 89 90 #define TI_PRUSS_PRU_IRQS 2 91 #define TI_PRUSS_HOST_IRQS 8 92 #define TI_PRUSS_IRQS (TI_PRUSS_HOST_IRQS+TI_PRUSS_PRU_IRQS) 93 #define TI_PRUSS_EVENTS 64 94 #define NOT_SET_STR "NONE" 95 #define TI_TS_ARRAY 16 96 97 struct ctl 98 { 99 size_t cnt; 100 size_t idx; 101 }; 102 103 struct ts_ring_buf 104 { 105 struct ctl ctl; 106 uint64_t ts[TI_TS_ARRAY]; 107 }; 108 109 struct ti_pruss_irqsc 110 { 111 struct mtx sc_mtx; 112 struct cdev *sc_pdev; 113 struct selinfo sc_selinfo; 114 int8_t channel; 115 int8_t last; 116 int8_t event; 117 bool enable; 118 struct ts_ring_buf tstamps; 119 }; 120 121 static struct cdevsw ti_pruss_cdevirq = { 122 .d_version = D_VERSION, 123 .d_name = "ti_pruss_irq", 124 .d_open = ti_pruss_irq_open, 125 .d_read = ti_pruss_irq_read, 126 .d_poll = ti_pruss_irq_poll, 127 .d_kqfilter = ti_pruss_irq_kqfilter, 128 }; 129 130 struct ti_pruss_softc { 131 struct mtx sc_mtx; 132 struct resource *sc_mem_res; 133 struct resource *sc_irq_res[TI_PRUSS_HOST_IRQS]; 134 void *sc_intr[TI_PRUSS_HOST_IRQS]; 135 struct ti_pruss_irqsc sc_irq_devs[TI_PRUSS_IRQS]; 136 bus_space_tag_t sc_bt; 137 bus_space_handle_t sc_bh; 138 struct cdev *sc_pdev; 139 struct selinfo sc_selinfo; 140 bool sc_glob_irqen; 141 }; 142 143 static struct cdevsw ti_pruss_cdevsw = { 144 .d_version = D_VERSION, 145 .d_name = "ti_pruss", 146 .d_open = ti_pruss_open, 147 .d_mmap = ti_pruss_mmap, 148 }; 149 150 static device_method_t ti_pruss_methods[] = { 151 DEVMETHOD(device_probe, ti_pruss_probe), 152 DEVMETHOD(device_attach, ti_pruss_attach), 153 DEVMETHOD(device_detach, ti_pruss_detach), 154 155 DEVMETHOD_END 156 }; 157 158 static driver_t ti_pruss_driver = { 159 "ti_pruss", 160 ti_pruss_methods, 161 sizeof(struct ti_pruss_softc) 162 }; 163 164 static devclass_t ti_pruss_devclass; 165 166 DRIVER_MODULE(ti_pruss, simplebus, ti_pruss_driver, ti_pruss_devclass, 0, 0); 167 MODULE_DEPEND(ti_pruss, ti_sysc, 1, 1, 1); 168 MODULE_DEPEND(ti_pruss, ti_prm, 1, 1, 1); 169 170 static struct resource_spec ti_pruss_irq_spec[] = { 171 { SYS_RES_IRQ, 0, RF_ACTIVE }, 172 { SYS_RES_IRQ, 1, RF_ACTIVE }, 173 { SYS_RES_IRQ, 2, RF_ACTIVE }, 174 { SYS_RES_IRQ, 3, RF_ACTIVE }, 175 { SYS_RES_IRQ, 4, RF_ACTIVE }, 176 { SYS_RES_IRQ, 5, RF_ACTIVE }, 177 { SYS_RES_IRQ, 6, RF_ACTIVE }, 178 { SYS_RES_IRQ, 7, RF_ACTIVE }, 179 { -1, 0, 0 } 180 }; 181 CTASSERT(TI_PRUSS_HOST_IRQS == nitems(ti_pruss_irq_spec) - 1); 182 183 static int 184 ti_pruss_irq_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 185 { 186 struct ctl* irqs; 187 struct ti_pruss_irqsc *sc; 188 sc = dev->si_drv1; 189 190 irqs = malloc(sizeof(struct ctl), M_DEVBUF, M_WAITOK); 191 if (!irqs) 192 return (ENOMEM); 193 194 irqs->cnt = sc->tstamps.ctl.cnt; 195 irqs->idx = sc->tstamps.ctl.idx; 196 197 return devfs_set_cdevpriv(irqs, ti_pruss_privdtor); 198 } 199 200 static void 201 ti_pruss_privdtor(void *data) 202 { 203 free(data, M_DEVBUF); 204 } 205 206 static int 207 ti_pruss_irq_poll(struct cdev *dev, int events, struct thread *td) 208 { 209 struct ctl* irqs; 210 struct ti_pruss_irqsc *sc; 211 sc = dev->si_drv1; 212 213 devfs_get_cdevpriv((void**)&irqs); 214 215 if (events & (POLLIN | POLLRDNORM)) { 216 if (sc->tstamps.ctl.cnt != irqs->cnt) 217 return events & (POLLIN | POLLRDNORM); 218 else 219 selrecord(td, &sc->sc_selinfo); 220 } 221 return 0; 222 } 223 224 static int 225 ti_pruss_irq_read(struct cdev *cdev, struct uio *uio, int ioflag) 226 { 227 const size_t ts_len = sizeof(uint64_t); 228 struct ti_pruss_irqsc* irq; 229 struct ctl* priv; 230 int error = 0; 231 size_t idx; 232 ssize_t level; 233 234 irq = cdev->si_drv1; 235 236 if (uio->uio_resid < ts_len) 237 return (EINVAL); 238 239 error = devfs_get_cdevpriv((void**)&priv); 240 if (error) 241 return (error); 242 243 mtx_lock(&irq->sc_mtx); 244 245 if (irq->tstamps.ctl.cnt - priv->cnt > TI_TS_ARRAY) 246 { 247 priv->cnt = irq->tstamps.ctl.cnt; 248 priv->idx = irq->tstamps.ctl.idx; 249 mtx_unlock(&irq->sc_mtx); 250 return (ENXIO); 251 } 252 253 do { 254 idx = priv->idx; 255 level = irq->tstamps.ctl.idx - idx; 256 if (level < 0) 257 level += TI_TS_ARRAY; 258 259 if (level == 0) { 260 if (ioflag & O_NONBLOCK) { 261 mtx_unlock(&irq->sc_mtx); 262 return (EWOULDBLOCK); 263 } 264 265 error = msleep(irq, &irq->sc_mtx, PCATCH | PDROP, 266 "pruirq", 0); 267 if (error) 268 return error; 269 270 mtx_lock(&irq->sc_mtx); 271 } 272 }while(level == 0); 273 274 mtx_unlock(&irq->sc_mtx); 275 276 error = uiomove(&irq->tstamps.ts[idx], ts_len, uio); 277 278 if (++idx == TI_TS_ARRAY) 279 idx = 0; 280 priv->idx = idx; 281 282 atomic_add_32(&priv->cnt, 1); 283 284 return (error); 285 } 286 287 static struct ti_pruss_irq_arg { 288 int irq; 289 struct ti_pruss_softc *sc; 290 } ti_pruss_irq_args[TI_PRUSS_IRQS]; 291 292 static __inline uint32_t 293 ti_pruss_reg_read(struct ti_pruss_softc *sc, uint32_t reg) 294 { 295 return (bus_space_read_4(sc->sc_bt, sc->sc_bh, reg)); 296 } 297 298 static __inline void 299 ti_pruss_reg_write(struct ti_pruss_softc *sc, uint32_t reg, uint32_t val) 300 { 301 bus_space_write_4(sc->sc_bt, sc->sc_bh, reg, val); 302 } 303 304 static __inline void 305 ti_pruss_interrupts_clear(struct ti_pruss_softc *sc) 306 { 307 /* disable global interrupt */ 308 ti_pruss_reg_write(sc, PRUSS_INTC_GER, 0 ); 309 310 /* clear all events */ 311 ti_pruss_reg_write(sc, PRUSS_INTC_SECR0, 0xFFFFFFFF); 312 ti_pruss_reg_write(sc, PRUSS_INTC_SECR1, 0xFFFFFFFF); 313 314 /* disable all host interrupts */ 315 ti_pruss_reg_write(sc, PRUSS_INTC_HIER, 0); 316 } 317 318 static __inline int 319 ti_pruss_interrupts_enable(struct ti_pruss_softc *sc, int8_t irq, bool enable) 320 { 321 if (enable && ((sc->sc_irq_devs[irq].channel == -1) || 322 (sc->sc_irq_devs[irq].event== -1))) 323 { 324 device_printf( sc->sc_pdev->si_drv1, 325 "Interrupt chain not fully configured, not possible to enable\n" ); 326 return (EINVAL); 327 } 328 329 sc->sc_irq_devs[irq].enable = enable; 330 331 if (sc->sc_irq_devs[irq].sc_pdev) { 332 destroy_dev(sc->sc_irq_devs[irq].sc_pdev); 333 sc->sc_irq_devs[irq].sc_pdev = NULL; 334 } 335 336 if (enable) { 337 sc->sc_irq_devs[irq].sc_pdev = make_dev(&ti_pruss_cdevirq, 0, UID_ROOT, GID_WHEEL, 338 0600, "pruss%d.irq%d", device_get_unit(sc->sc_pdev->si_drv1), irq); 339 sc->sc_irq_devs[irq].sc_pdev->si_drv1 = &sc->sc_irq_devs[irq]; 340 341 sc->sc_irq_devs[irq].tstamps.ctl.idx = 0; 342 } 343 344 uint32_t reg = enable ? PRUSS_INTC_HIEISR : PRUSS_INTC_HIDISR; 345 ti_pruss_reg_write(sc, reg, sc->sc_irq_devs[irq].channel); 346 347 reg = enable ? PRUSS_INTC_EISR : PRUSS_INTC_EICR; 348 ti_pruss_reg_write(sc, reg, sc->sc_irq_devs[irq].event ); 349 350 return (0); 351 } 352 353 static __inline void 354 ti_pruss_map_write(struct ti_pruss_softc *sc, uint32_t basereg, uint8_t index, uint8_t content) 355 { 356 const size_t regadr = basereg + index & ~0x03; 357 const size_t bitpos = (index & 0x03) * 8; 358 uint32_t rmw = ti_pruss_reg_read(sc, regadr); 359 rmw = (rmw & ~( 0xF << bitpos)) | ( (content & 0xF) << bitpos); 360 ti_pruss_reg_write(sc, regadr, rmw); 361 } 362 363 static int 364 ti_pruss_event_map( SYSCTL_HANDLER_ARGS ) 365 { 366 struct ti_pruss_softc *sc; 367 const int8_t irq = arg2; 368 int err; 369 char event[sizeof(NOT_SET_STR)]; 370 371 sc = arg1; 372 373 if(sc->sc_irq_devs[irq].event == -1) 374 bcopy(NOT_SET_STR, event, sizeof(event)); 375 else 376 snprintf(event, sizeof(event), "%d", sc->sc_irq_devs[irq].event); 377 378 err = sysctl_handle_string(oidp, event, sizeof(event), req); 379 if(err != 0) 380 return (err); 381 382 if (req->newptr) { // write event 383 if (strcmp(NOT_SET_STR, event) == 0) { 384 ti_pruss_interrupts_enable(sc, irq, false); 385 sc->sc_irq_devs[irq].event = -1; 386 } else { 387 if (sc->sc_irq_devs[irq].channel == -1) { 388 device_printf( sc->sc_pdev->si_drv1, 389 "corresponding channel not configured\n"); 390 return (ENXIO); 391 } 392 393 const int8_t channelnr = sc->sc_irq_devs[irq].channel; 394 const int8_t eventnr = strtol( event, NULL, 10 ); // TODO: check if strol is valid 395 if (eventnr > TI_PRUSS_EVENTS || eventnr < 0) { 396 device_printf( sc->sc_pdev->si_drv1, 397 "Event number %d not valid (0 - %d)", 398 channelnr, TI_PRUSS_EVENTS -1); 399 return (EINVAL); 400 } 401 402 sc->sc_irq_devs[irq].channel = channelnr; 403 sc->sc_irq_devs[irq].event = eventnr; 404 405 // event[nr] <= channel 406 ti_pruss_map_write(sc, PRUSS_INTC_CMR_BASE, 407 eventnr, channelnr); 408 } 409 } 410 return (err); 411 } 412 413 static int 414 ti_pruss_channel_map(SYSCTL_HANDLER_ARGS) 415 { 416 struct ti_pruss_softc *sc; 417 int err; 418 char channel[sizeof(NOT_SET_STR)]; 419 const int8_t irq = arg2; 420 421 sc = arg1; 422 423 if (sc->sc_irq_devs[irq].channel == -1) 424 bcopy(NOT_SET_STR, channel, sizeof(channel)); 425 else 426 snprintf(channel, sizeof(channel), "%d", sc->sc_irq_devs[irq].channel); 427 428 err = sysctl_handle_string(oidp, channel, sizeof(channel), req); 429 if (err != 0) 430 return (err); 431 432 if (req->newptr) { // write event 433 if (strcmp(NOT_SET_STR, channel) == 0) { 434 ti_pruss_interrupts_enable(sc, irq, false); 435 ti_pruss_reg_write(sc, PRUSS_INTC_HIDISR, 436 sc->sc_irq_devs[irq].channel); 437 sc->sc_irq_devs[irq].channel = -1; 438 } else { 439 const int8_t channelnr = strtol(channel, NULL, 10); // TODO: check if strol is valid 440 if (channelnr > TI_PRUSS_IRQS || channelnr < 0) 441 { 442 device_printf(sc->sc_pdev->si_drv1, 443 "Channel number %d not valid (0 - %d)", 444 channelnr, TI_PRUSS_IRQS-1); 445 return (EINVAL); 446 } 447 448 sc->sc_irq_devs[irq].channel = channelnr; 449 sc->sc_irq_devs[irq].last = -1; 450 451 // channel[nr] <= irqnr 452 ti_pruss_map_write(sc, PRUSS_INTC_HMR_BASE, 453 irq, channelnr); 454 } 455 } 456 457 return (err); 458 } 459 460 static int 461 ti_pruss_interrupt_enable(SYSCTL_HANDLER_ARGS) 462 { 463 struct ti_pruss_softc *sc; 464 int err; 465 bool irqenable; 466 const int8_t irq = arg2; 467 468 sc = arg1; 469 irqenable = sc->sc_irq_devs[arg2].enable; 470 471 err = sysctl_handle_bool(oidp, &irqenable, arg2, req); 472 if (err != 0) 473 return (err); 474 475 if (req->newptr) // write enable 476 return ti_pruss_interrupts_enable(sc, irq, irqenable); 477 478 return (err); 479 } 480 481 static int 482 ti_pruss_global_interrupt_enable(SYSCTL_HANDLER_ARGS) 483 { 484 struct ti_pruss_softc *sc; 485 int err; 486 bool glob_irqen; 487 488 sc = arg1; 489 glob_irqen = sc->sc_glob_irqen; 490 491 err = sysctl_handle_bool(oidp, &glob_irqen, arg2, req); 492 if (err != 0) 493 return (err); 494 495 if (req->newptr) { 496 sc->sc_glob_irqen = glob_irqen; 497 ti_pruss_reg_write(sc, PRUSS_INTC_GER, glob_irqen); 498 } 499 500 return (err); 501 } 502 static int 503 ti_pruss_probe(device_t dev) 504 { 505 506 if (!ofw_bus_status_okay(dev)) 507 return (ENXIO); 508 509 if (ofw_bus_is_compatible(dev, "ti,pruss-v1") || 510 ofw_bus_is_compatible(dev, "ti,pruss-v2")) { 511 device_set_desc(dev, "TI Programmable Realtime Unit Subsystem"); 512 return (BUS_PROBE_DEFAULT); 513 } 514 515 return (ENXIO); 516 } 517 518 static int 519 ti_pruss_attach(device_t dev) 520 { 521 struct ti_pruss_softc *sc; 522 int rid, i, err, ncells; 523 phandle_t node; 524 clk_t l3_gclk, pruss_ocp_gclk; 525 phandle_t ti_prm_ref, *cells; 526 device_t ti_prm_dev; 527 528 rid = 0; 529 sc = device_get_softc(dev); 530 node = ofw_bus_get_node(device_get_parent(dev)); 531 if (node <= 0) { 532 device_printf(dev, "Cant get ofw node\n"); 533 return (ENXIO); 534 } 535 536 /* 537 * Follow activate pattern from sys/arm/ti/am335x/am335x_prcm.c 538 * by Damjan Marion 539 */ 540 541 /* Set MODULEMODE to ENABLE(2) */ 542 /* Wait for MODULEMODE to become ENABLE(2) */ 543 if (ti_sysc_clock_enable(device_get_parent(dev)) != 0) { 544 device_printf(dev, "Could not enable PRUSS clock\n"); 545 return (ENXIO); 546 } 547 548 /* Set CLKTRCTRL to SW_WKUP(2) */ 549 /* Wait for the 200 MHz OCP clock to become active */ 550 /* Wait for the 200 MHz IEP clock to become active */ 551 /* Wait for the 192 MHz UART clock to become active */ 552 /* 553 * At the moment there is no reference to CM_PER_PRU_ICSS_CLKSTCTRL@140 554 * in the devicetree. The register reset state are SW_WKUP(2) as default 555 * so at the moment ignore setting this register. 556 */ 557 558 /* Select L3F as OCP clock */ 559 /* Get the clock and set the parent */ 560 err = clk_get_by_name(dev, "l3_gclk", &l3_gclk); 561 if (err) { 562 device_printf(dev, "Cant get l3_gclk err %d\n", err); 563 return (ENXIO); 564 } 565 566 err = clk_get_by_name(dev, "pruss_ocp_gclk@530", &pruss_ocp_gclk); 567 if (err) { 568 device_printf(dev, "Cant get pruss_ocp_gclk@530 err %d\n", err); 569 return (ENXIO); 570 } 571 572 err = clk_set_parent_by_clk(pruss_ocp_gclk, l3_gclk); 573 if (err) { 574 device_printf(dev, 575 "Cant set pruss_ocp_gclk parent to l3_gclk err %d\n", err); 576 return (ENXIO); 577 } 578 579 /* Clear the RESET bit */ 580 /* Find the ti_prm */ 581 /* #reset-cells should not been used in this way but... */ 582 err = ofw_bus_parse_xref_list_alloc(node, "resets", "#reset-cells", 0, 583 &ti_prm_ref, &ncells, &cells); 584 OF_prop_free(cells); 585 if (err) { 586 device_printf(dev, 587 "Cant fetch \"resets\" reference %x\n", err); 588 return (ENXIO); 589 } 590 591 ti_prm_dev = OF_device_from_xref(ti_prm_ref); 592 if (ti_prm_dev == NULL) { 593 device_printf(dev, "Cant get device from \"resets\"\n"); 594 return (ENXIO); 595 } 596 597 err = ti_prm_reset(ti_prm_dev); 598 if (err) { 599 device_printf(dev, "ti_prm_reset failed %d\n", err); 600 return (ENXIO); 601 } 602 /* End of clock activation */ 603 604 mtx_init(&sc->sc_mtx, "TI PRUSS", NULL, MTX_DEF); 605 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 606 RF_ACTIVE); 607 if (sc->sc_mem_res == NULL) { 608 device_printf(dev, "could not allocate memory resource\n"); 609 return (ENXIO); 610 } 611 612 struct sysctl_ctx_list *clist = device_get_sysctl_ctx(dev); 613 if (!clist) 614 return (EINVAL); 615 616 struct sysctl_oid *poid; 617 poid = device_get_sysctl_tree( dev ); 618 if (!poid) 619 return (EINVAL); 620 621 sc->sc_glob_irqen = false; 622 struct sysctl_oid *irq_root = SYSCTL_ADD_NODE(clist, SYSCTL_CHILDREN(poid), 623 OID_AUTO, "irq", CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 624 "PRUSS Host Interrupts"); 625 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(poid), OID_AUTO, 626 "global_interrupt_enable", 627 CTLFLAG_RW | CTLTYPE_U8 | CTLFLAG_NEEDGIANT, 628 sc, 0, ti_pruss_global_interrupt_enable, 629 "CU", "Global interrupt enable"); 630 631 sc->sc_bt = rman_get_bustag(sc->sc_mem_res); 632 sc->sc_bh = rman_get_bushandle(sc->sc_mem_res); 633 if (bus_alloc_resources(dev, ti_pruss_irq_spec, sc->sc_irq_res) != 0) { 634 device_printf(dev, "could not allocate interrupt resource\n"); 635 ti_pruss_detach(dev); 636 return (ENXIO); 637 } 638 639 ti_pruss_interrupts_clear(sc); 640 641 for (i = 0; i < TI_PRUSS_IRQS; i++) { 642 char name[8]; 643 snprintf(name, sizeof(name), "%d", i); 644 645 struct sysctl_oid *irq_nodes = SYSCTL_ADD_NODE(clist, SYSCTL_CHILDREN(irq_root), 646 OID_AUTO, name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 647 "PRUSS Interrupts"); 648 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(irq_nodes), OID_AUTO, 649 "channel", CTLFLAG_RW | CTLTYPE_STRING | CTLFLAG_NEEDGIANT, 650 sc, i, ti_pruss_channel_map, 651 "A", "Channel attached to this irq"); 652 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(irq_nodes), OID_AUTO, 653 "event", CTLFLAG_RW | CTLTYPE_STRING | CTLFLAG_NEEDGIANT, 654 sc, i, ti_pruss_event_map, 655 "A", "Event attached to this irq"); 656 SYSCTL_ADD_PROC(clist, SYSCTL_CHILDREN(irq_nodes), OID_AUTO, 657 "enable", CTLFLAG_RW | CTLTYPE_U8 | CTLFLAG_NEEDGIANT, 658 sc, i, ti_pruss_interrupt_enable, 659 "CU", "Enable/Disable interrupt"); 660 661 sc->sc_irq_devs[i].event = -1; 662 sc->sc_irq_devs[i].channel = -1; 663 sc->sc_irq_devs[i].tstamps.ctl.idx = 0; 664 665 if (i < TI_PRUSS_HOST_IRQS) { 666 ti_pruss_irq_args[i].irq = i; 667 ti_pruss_irq_args[i].sc = sc; 668 if (bus_setup_intr(dev, sc->sc_irq_res[i], 669 INTR_MPSAFE | INTR_TYPE_MISC, 670 NULL, ti_pruss_intr, &ti_pruss_irq_args[i], 671 &sc->sc_intr[i]) != 0) { 672 device_printf(dev, 673 "unable to setup the interrupt handler\n"); 674 ti_pruss_detach(dev); 675 676 return (ENXIO); 677 } 678 mtx_init(&sc->sc_irq_devs[i].sc_mtx, "TI PRUSS IRQ", NULL, MTX_DEF); 679 knlist_init_mtx(&sc->sc_irq_devs[i].sc_selinfo.si_note, &sc->sc_irq_devs[i].sc_mtx); 680 } 681 } 682 683 if (ti_pruss_reg_read(sc, PRUSS_AM33XX_INTC) == PRUSS_AM33XX_REV) 684 device_printf(dev, "AM33xx PRU-ICSS\n"); 685 686 sc->sc_pdev = make_dev(&ti_pruss_cdevsw, 0, UID_ROOT, GID_WHEEL, 687 0600, "pruss%d", device_get_unit(dev)); 688 sc->sc_pdev->si_drv1 = dev; 689 690 /* Acc. to datasheet always write 1 to polarity registers */ 691 ti_pruss_reg_write(sc, PRUSS_INTC_SIPR0, 0xFFFFFFFF); 692 ti_pruss_reg_write(sc, PRUSS_INTC_SIPR1, 0xFFFFFFFF); 693 694 /* Acc. to datasheet always write 0 to event type registers */ 695 ti_pruss_reg_write(sc, PRUSS_INTC_SITR0, 0); 696 ti_pruss_reg_write(sc, PRUSS_INTC_SITR1, 0); 697 698 return (0); 699 } 700 701 static int 702 ti_pruss_detach(device_t dev) 703 { 704 struct ti_pruss_softc *sc = device_get_softc(dev); 705 706 ti_pruss_interrupts_clear(sc); 707 708 for (int i = 0; i < TI_PRUSS_HOST_IRQS; i++) { 709 ti_pruss_interrupts_enable( sc, i, false ); 710 711 if (sc->sc_intr[i]) 712 bus_teardown_intr(dev, sc->sc_irq_res[i], sc->sc_intr[i]); 713 if (sc->sc_irq_res[i]) 714 bus_release_resource(dev, SYS_RES_IRQ, 715 rman_get_rid(sc->sc_irq_res[i]), 716 sc->sc_irq_res[i]); 717 knlist_clear(&sc->sc_irq_devs[i].sc_selinfo.si_note, 0); 718 mtx_lock(&sc->sc_irq_devs[i].sc_mtx); 719 if (!knlist_empty(&sc->sc_irq_devs[i].sc_selinfo.si_note)) 720 printf("IRQ %d KQueue not empty!\n", i ); 721 mtx_unlock(&sc->sc_irq_devs[i].sc_mtx); 722 knlist_destroy(&sc->sc_irq_devs[i].sc_selinfo.si_note); 723 mtx_destroy(&sc->sc_irq_devs[i].sc_mtx); 724 } 725 726 mtx_destroy(&sc->sc_mtx); 727 if (sc->sc_mem_res) 728 bus_release_resource(dev, SYS_RES_MEMORY, rman_get_rid(sc->sc_mem_res), 729 sc->sc_mem_res); 730 if (sc->sc_pdev) 731 destroy_dev(sc->sc_pdev); 732 733 return (0); 734 } 735 736 static void 737 ti_pruss_intr(void *arg) 738 { 739 int val; 740 struct ti_pruss_irq_arg *iap = arg; 741 struct ti_pruss_softc *sc = iap->sc; 742 /* 743 * Interrupts pr1_host_intr[0:7] are mapped to 744 * Host-2 to Host-9 of PRU-ICSS IRQ-controller. 745 */ 746 const int pru_int = iap->irq + TI_PRUSS_PRU_IRQS; 747 const int pru_int_mask = (1 << pru_int); 748 const int pru_channel = sc->sc_irq_devs[pru_int].channel; 749 const int pru_event = sc->sc_irq_devs[pru_channel].event; 750 751 val = ti_pruss_reg_read(sc, PRUSS_INTC_HIER); 752 if (!(val & pru_int_mask)) 753 return; 754 755 ti_pruss_reg_write(sc, PRUSS_INTC_HIDISR, pru_int); 756 ti_pruss_reg_write(sc, PRUSS_INTC_SICR, pru_event); 757 ti_pruss_reg_write(sc, PRUSS_INTC_HIEISR, pru_int); 758 759 struct ti_pruss_irqsc* irq = &sc->sc_irq_devs[pru_channel]; 760 size_t wr = irq->tstamps.ctl.idx; 761 762 struct timespec ts; 763 nanouptime(&ts); 764 irq->tstamps.ts[wr] = ts.tv_sec * 1000000000 + ts.tv_nsec; 765 766 if (++wr == TI_TS_ARRAY) 767 wr = 0; 768 atomic_add_32(&irq->tstamps.ctl.cnt, 1); 769 770 irq->tstamps.ctl.idx = wr; 771 772 KNOTE_UNLOCKED(&irq->sc_selinfo.si_note, pru_int); 773 wakeup(irq); 774 selwakeup(&irq->sc_selinfo); 775 } 776 777 static int 778 ti_pruss_open(struct cdev *cdev __unused, int oflags __unused, 779 int devtype __unused, struct thread *td __unused) 780 { 781 return (0); 782 } 783 784 static int 785 ti_pruss_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_paddr_t *paddr, 786 int nprot, vm_memattr_t *memattr) 787 { 788 device_t dev = cdev->si_drv1; 789 struct ti_pruss_softc *sc = device_get_softc(dev); 790 791 if (offset >= rman_get_size(sc->sc_mem_res)) 792 return (ENOSPC); 793 *paddr = rman_get_start(sc->sc_mem_res) + offset; 794 *memattr = VM_MEMATTR_UNCACHEABLE; 795 796 return (0); 797 } 798 799 static struct filterops ti_pruss_kq_read = { 800 .f_isfd = 1, 801 .f_detach = ti_pruss_irq_kqread_detach, 802 .f_event = ti_pruss_irq_kqevent, 803 }; 804 805 static void 806 ti_pruss_irq_kqread_detach(struct knote *kn) 807 { 808 struct ti_pruss_irqsc *sc = kn->kn_hook; 809 810 knlist_remove(&sc->sc_selinfo.si_note, kn, 0); 811 } 812 813 static int 814 ti_pruss_irq_kqevent(struct knote *kn, long hint) 815 { 816 struct ti_pruss_irqsc* irq_sc; 817 int notify; 818 819 irq_sc = kn->kn_hook; 820 821 if (hint > 0) 822 kn->kn_data = hint - 2; 823 824 if (hint > 0 || irq_sc->last > 0) 825 notify = 1; 826 else 827 notify = 0; 828 829 irq_sc->last = hint; 830 831 return (notify); 832 } 833 834 static int 835 ti_pruss_irq_kqfilter(struct cdev *cdev, struct knote *kn) 836 { 837 struct ti_pruss_irqsc *sc = cdev->si_drv1; 838 839 switch (kn->kn_filter) { 840 case EVFILT_READ: 841 kn->kn_hook = sc; 842 kn->kn_fop = &ti_pruss_kq_read; 843 knlist_add(&sc->sc_selinfo.si_note, kn, 0); 844 break; 845 default: 846 return (EINVAL); 847 } 848 849 return (0); 850 } 851