Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/flash/cqspi.c
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1 /*- 2 * Copyright (c) 2017-2018 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by SRI International and the University of 6 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 7 * ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* 32 * Cadence Quad SPI Flash Controller driver. 33 * 4B-addressing mode supported only. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "opt_platform.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/bio.h> 44 #include <sys/bus.h> 45 #include <sys/conf.h> 46 #include <sys/kernel.h> 47 #include <sys/kthread.h> 48 #include <sys/lock.h> 49 #include <sys/mbuf.h> 50 #include <sys/malloc.h> 51 #include <sys/module.h> 52 #include <sys/mutex.h> 53 #include <sys/rman.h> 54 #include <geom/geom_disk.h> 55 56 #include <machine/bus.h> 57 58 #include <dev/fdt/simplebus.h> 59 #include <dev/fdt/fdt_common.h> 60 #include <dev/ofw/ofw_bus_subr.h> 61 #include <dev/ofw/openfirm.h> 62 63 #include <dev/flash/cqspi.h> 64 #include <dev/flash/mx25lreg.h> 65 #include <dev/xdma/xdma.h> 66 67 #include "qspi_if.h" 68 69 #define CQSPI_DEBUG 70 #undef CQSPI_DEBUG 71 72 #ifdef CQSPI_DEBUG 73 #define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__) 74 #else 75 #define dprintf(fmt, ...) 76 #endif 77 78 #define CQSPI_SECTORSIZE 512 79 #define TX_QUEUE_SIZE 16 80 #define RX_QUEUE_SIZE 16 81 82 #define READ4(_sc, _reg) bus_read_4((_sc)->res[0], _reg) 83 #define READ2(_sc, _reg) bus_read_2((_sc)->res[0], _reg) 84 #define READ1(_sc, _reg) bus_read_1((_sc)->res[0], _reg) 85 #define WRITE4(_sc, _reg, _val) bus_write_4((_sc)->res[0], _reg, _val) 86 #define WRITE2(_sc, _reg, _val) bus_write_2((_sc)->res[0], _reg, _val) 87 #define WRITE1(_sc, _reg, _val) bus_write_1((_sc)->res[0], _reg, _val) 88 #define READ_DATA_4(_sc, _reg) bus_read_4((_sc)->res[1], _reg) 89 #define READ_DATA_1(_sc, _reg) bus_read_1((_sc)->res[1], _reg) 90 #define WRITE_DATA_4(_sc, _reg, _val) bus_write_4((_sc)->res[1], _reg, _val) 91 #define WRITE_DATA_1(_sc, _reg, _val) bus_write_1((_sc)->res[1], _reg, _val) 92 93 struct cqspi_softc { 94 device_t dev; 95 96 struct resource *res[3]; 97 bus_space_tag_t bst; 98 bus_space_handle_t bsh; 99 void *ih; 100 uint8_t read_op_done; 101 uint8_t write_op_done; 102 103 uint32_t fifo_depth; 104 uint32_t fifo_width; 105 uint32_t trigger_address; 106 uint32_t sram_phys; 107 108 /* xDMA */ 109 xdma_controller_t *xdma_tx; 110 xdma_channel_t *xchan_tx; 111 void *ih_tx; 112 113 xdma_controller_t *xdma_rx; 114 xdma_channel_t *xchan_rx; 115 void *ih_rx; 116 117 struct intr_config_hook config_intrhook; 118 struct mtx sc_mtx; 119 }; 120 121 #define CQSPI_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 122 #define CQSPI_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 123 #define CQSPI_LOCK_INIT(_sc) \ 124 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 125 "cqspi", MTX_DEF) 126 #define CQSPI_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 127 #define CQSPI_ASSERT_LOCKED(_sc) \ 128 mtx_assert(&_sc->sc_mtx, MA_OWNED); 129 #define CQSPI_ASSERT_UNLOCKED(_sc) \ 130 mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 131 132 static struct resource_spec cqspi_spec[] = { 133 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 134 { SYS_RES_MEMORY, 1, RF_ACTIVE }, 135 { SYS_RES_IRQ, 0, RF_ACTIVE }, 136 { -1, 0 } 137 }; 138 139 static struct ofw_compat_data compat_data[] = { 140 { "cdns,qspi-nor", 1 }, 141 { NULL, 0 }, 142 }; 143 144 static void 145 cqspi_intr(void *arg) 146 { 147 struct cqspi_softc *sc; 148 uint32_t pending; 149 150 sc = arg; 151 152 pending = READ4(sc, CQSPI_IRQSTAT); 153 154 dprintf("%s: IRQSTAT %x\n", __func__, pending); 155 156 if (pending & (IRQMASK_INDOPDONE | IRQMASK_INDXFRLVL | 157 IRQMASK_INDSRAMFULL)) { 158 /* TODO: PIO operation done */ 159 } 160 161 WRITE4(sc, CQSPI_IRQSTAT, pending); 162 } 163 164 static int 165 cqspi_xdma_tx_intr(void *arg, xdma_transfer_status_t *status) 166 { 167 struct xdma_transfer_status st; 168 struct cqspi_softc *sc; 169 struct bio *bp; 170 int ret; 171 int deq; 172 173 sc = arg; 174 175 dprintf("%s\n", __func__); 176 177 deq = 0; 178 179 while (1) { 180 ret = xdma_dequeue_bio(sc->xchan_tx, &bp, &st); 181 if (ret != 0) { 182 break; 183 } 184 sc->write_op_done = 1; 185 deq++; 186 } 187 188 if (deq > 1) 189 device_printf(sc->dev, 190 "Warning: more than 1 tx bio dequeued\n"); 191 192 wakeup(&sc->xdma_tx); 193 194 return (0); 195 } 196 197 static int 198 cqspi_xdma_rx_intr(void *arg, xdma_transfer_status_t *status) 199 { 200 struct xdma_transfer_status st; 201 struct cqspi_softc *sc; 202 struct bio *bp; 203 int ret; 204 int deq; 205 206 sc = arg; 207 208 dprintf("%s\n", __func__); 209 210 deq = 0; 211 212 while (1) { 213 ret = xdma_dequeue_bio(sc->xchan_rx, &bp, &st); 214 if (ret != 0) { 215 break; 216 } 217 sc->read_op_done = 1; 218 deq++; 219 } 220 221 if (deq > 1) 222 device_printf(sc->dev, 223 "Warning: more than 1 rx bio dequeued\n"); 224 225 wakeup(&sc->xdma_rx); 226 227 return (0); 228 } 229 230 static int 231 cqspi_wait_for_completion(struct cqspi_softc *sc) 232 { 233 int timeout; 234 int i; 235 236 timeout = 10000; 237 238 for (i = timeout; i > 0; i--) { 239 if ((READ4(sc, CQSPI_FLASHCMD) & FLASHCMD_CMDEXECSTAT) == 0) { 240 break; 241 } 242 } 243 244 if (i == 0) { 245 device_printf(sc->dev, "%s: cmd timed out: %x\n", 246 __func__, READ4(sc, CQSPI_FLASHCMD)); 247 return (-1); 248 } 249 250 return (0); 251 } 252 253 static int 254 cqspi_cmd_write_addr(struct cqspi_softc *sc, uint8_t cmd, 255 uint32_t addr, uint32_t len) 256 { 257 uint32_t reg; 258 int ret; 259 260 dprintf("%s: %x\n", __func__, cmd); 261 262 WRITE4(sc, CQSPI_FLASHCMDADDR, addr); 263 reg = (cmd << FLASHCMD_CMDOPCODE_S); 264 reg |= (FLASHCMD_ENCMDADDR); 265 reg |= ((len - 1) << FLASHCMD_NUMADDRBYTES_S); 266 WRITE4(sc, CQSPI_FLASHCMD, reg); 267 268 reg |= FLASHCMD_EXECCMD; 269 WRITE4(sc, CQSPI_FLASHCMD, reg); 270 271 ret = cqspi_wait_for_completion(sc); 272 273 return (ret); 274 } 275 276 static int 277 cqspi_cmd_write(struct cqspi_softc *sc, uint8_t cmd, 278 uint8_t *addr, uint32_t len) 279 { 280 uint32_t reg; 281 int ret; 282 283 reg = (cmd << FLASHCMD_CMDOPCODE_S); 284 WRITE4(sc, CQSPI_FLASHCMD, reg); 285 reg |= FLASHCMD_EXECCMD; 286 WRITE4(sc, CQSPI_FLASHCMD, reg); 287 288 ret = cqspi_wait_for_completion(sc); 289 290 return (ret); 291 } 292 293 static int 294 cqspi_cmd_read(struct cqspi_softc *sc, uint8_t cmd, 295 uint8_t *addr, uint32_t len) 296 { 297 uint32_t data; 298 uint32_t reg; 299 uint8_t *buf; 300 int ret; 301 int i; 302 303 if (len > 8) { 304 device_printf(sc->dev, "Failed to read data\n"); 305 return (-1); 306 } 307 308 dprintf("%s: %x\n", __func__, cmd); 309 310 buf = (uint8_t *)addr; 311 312 reg = (cmd << FLASHCMD_CMDOPCODE_S); 313 reg |= ((len - 1) << FLASHCMD_NUMRDDATABYTES_S); 314 reg |= FLASHCMD_ENRDDATA; 315 WRITE4(sc, CQSPI_FLASHCMD, reg); 316 317 reg |= FLASHCMD_EXECCMD; 318 WRITE4(sc, CQSPI_FLASHCMD, reg); 319 320 ret = cqspi_wait_for_completion(sc); 321 if (ret != 0) { 322 device_printf(sc->dev, "%s: cmd failed: %x\n", 323 __func__, cmd); 324 return (ret); 325 } 326 327 data = READ4(sc, CQSPI_FLASHCMDRDDATALO); 328 329 for (i = 0; i < len; i++) 330 buf[i] = (data >> (i * 8)) & 0xff; 331 332 return (0); 333 } 334 335 static int 336 cqspi_wait_ready(struct cqspi_softc *sc) 337 { 338 uint8_t data; 339 340 do { 341 cqspi_cmd_read(sc, CMD_READ_STATUS, &data, 1); 342 } while (data & STATUS_WIP); 343 344 return (0); 345 } 346 347 static int 348 cqspi_write_reg(device_t dev, device_t child, 349 uint8_t opcode, uint8_t *addr, uint32_t len) 350 { 351 struct cqspi_softc *sc; 352 int ret; 353 354 sc = device_get_softc(dev); 355 356 ret = cqspi_cmd_write(sc, opcode, addr, len); 357 358 return (ret); 359 } 360 361 static int 362 cqspi_read_reg(device_t dev, device_t child, 363 uint8_t opcode, uint8_t *addr, uint32_t len) 364 { 365 struct cqspi_softc *sc; 366 int ret; 367 368 sc = device_get_softc(dev); 369 370 ret = cqspi_cmd_read(sc, opcode, addr, len); 371 372 return (ret); 373 } 374 375 static int 376 cqspi_wait_idle(struct cqspi_softc *sc) 377 { 378 uint32_t reg; 379 380 do { 381 reg = READ4(sc, CQSPI_CFG); 382 if (reg & CFG_IDLE) { 383 break; 384 } 385 } while (1); 386 387 return (0); 388 } 389 390 static int 391 cqspi_erase(device_t dev, device_t child, off_t offset) 392 { 393 struct cqspi_softc *sc; 394 395 sc = device_get_softc(dev); 396 397 cqspi_wait_idle(sc); 398 cqspi_wait_ready(sc); 399 cqspi_cmd_write(sc, CMD_WRITE_ENABLE, 0, 0); 400 401 cqspi_wait_idle(sc); 402 cqspi_wait_ready(sc); 403 cqspi_cmd_write_addr(sc, CMD_QUAD_SECTOR_ERASE, offset, 4); 404 405 cqspi_wait_idle(sc); 406 407 return (0); 408 } 409 410 static int 411 cqspi_write(device_t dev, device_t child, struct bio *bp, 412 off_t offset, caddr_t data, off_t count) 413 { 414 struct cqspi_softc *sc; 415 uint32_t reg; 416 417 dprintf("%s: offset 0x%llx count %lld bytes\n", 418 __func__, offset, count); 419 420 sc = device_get_softc(dev); 421 422 cqspi_wait_ready(sc); 423 cqspi_cmd_write(sc, CMD_WRITE_ENABLE, 0, 0); 424 425 cqspi_wait_idle(sc); 426 cqspi_wait_ready(sc); 427 cqspi_wait_idle(sc); 428 429 reg = DMAPER_NUMSGLREQBYTES_4; 430 reg |= DMAPER_NUMBURSTREQBYTES_4; 431 WRITE4(sc, CQSPI_DMAPER, reg); 432 433 WRITE4(sc, CQSPI_INDWRWATER, 64); 434 WRITE4(sc, CQSPI_INDWR, INDRD_IND_OPS_DONE_STATUS); 435 WRITE4(sc, CQSPI_INDWR, 0); 436 437 WRITE4(sc, CQSPI_INDWRCNT, count); 438 WRITE4(sc, CQSPI_INDWRSTADDR, offset); 439 440 reg = (0 << DEVWR_DUMMYWRCLKS_S); 441 reg |= DEVWR_DATA_WIDTH_QUAD; 442 reg |= DEVWR_ADDR_WIDTH_SINGLE; 443 reg |= (CMD_QUAD_PAGE_PROGRAM << DEVWR_WROPCODE_S); 444 WRITE4(sc, CQSPI_DEVWR, reg); 445 446 reg = DEVRD_DATA_WIDTH_QUAD; 447 reg |= DEVRD_ADDR_WIDTH_SINGLE; 448 reg |= DEVRD_INST_WIDTH_SINGLE; 449 WRITE4(sc, CQSPI_DEVRD, reg); 450 451 xdma_enqueue_bio(sc->xchan_tx, &bp, 452 sc->sram_phys, 4, 4, XDMA_MEM_TO_DEV); 453 xdma_queue_submit(sc->xchan_tx); 454 455 sc->write_op_done = 0; 456 457 WRITE4(sc, CQSPI_INDWR, INDRD_START); 458 459 while (sc->write_op_done == 0) 460 tsleep(&sc->xdma_tx, PCATCH | PZERO, "spi", hz/2); 461 462 cqspi_wait_idle(sc); 463 464 return (0); 465 } 466 467 static int 468 cqspi_read(device_t dev, device_t child, struct bio *bp, 469 off_t offset, caddr_t data, off_t count) 470 { 471 struct cqspi_softc *sc; 472 uint32_t reg; 473 474 sc = device_get_softc(dev); 475 476 dprintf("%s: offset 0x%llx count %lld bytes\n", 477 __func__, offset, count); 478 479 cqspi_wait_idle(sc); 480 481 reg = DMAPER_NUMSGLREQBYTES_4; 482 reg |= DMAPER_NUMBURSTREQBYTES_4; 483 WRITE4(sc, CQSPI_DMAPER, reg); 484 485 WRITE4(sc, CQSPI_INDRDWATER, 64); 486 WRITE4(sc, CQSPI_INDRD, INDRD_IND_OPS_DONE_STATUS); 487 WRITE4(sc, CQSPI_INDRD, 0); 488 489 WRITE4(sc, CQSPI_INDRDCNT, count); 490 WRITE4(sc, CQSPI_INDRDSTADDR, offset); 491 492 reg = (0 << DEVRD_DUMMYRDCLKS_S); 493 reg |= DEVRD_DATA_WIDTH_QUAD; 494 reg |= DEVRD_ADDR_WIDTH_SINGLE; 495 reg |= DEVRD_INST_WIDTH_SINGLE; 496 reg |= DEVRD_ENMODEBITS; 497 reg |= (CMD_READ_4B_QUAD_OUTPUT << DEVRD_RDOPCODE_S); 498 WRITE4(sc, CQSPI_DEVRD, reg); 499 500 WRITE4(sc, CQSPI_MODEBIT, 0xff); 501 WRITE4(sc, CQSPI_IRQMASK, 0); 502 503 xdma_enqueue_bio(sc->xchan_rx, &bp, sc->sram_phys, 4, 4, 504 XDMA_DEV_TO_MEM); 505 xdma_queue_submit(sc->xchan_rx); 506 507 sc->read_op_done = 0; 508 509 WRITE4(sc, CQSPI_INDRD, INDRD_START); 510 511 while (sc->read_op_done == 0) 512 tsleep(&sc->xdma_rx, PCATCH | PZERO, "spi", hz/2); 513 514 cqspi_wait_idle(sc); 515 516 return (0); 517 } 518 519 static int 520 cqspi_init(struct cqspi_softc *sc) 521 { 522 pcell_t dts_value[1]; 523 phandle_t node; 524 uint32_t reg; 525 int len; 526 527 device_printf(sc->dev, "Module ID %x\n", 528 READ4(sc, CQSPI_MODULEID)); 529 530 if ((node = ofw_bus_get_node(sc->dev)) == -1) { 531 return (ENXIO); 532 } 533 534 if ((len = OF_getproplen(node, "cdns,fifo-depth")) <= 0) { 535 return (ENXIO); 536 } 537 OF_getencprop(node, "cdns,fifo-depth", dts_value, len); 538 sc->fifo_depth = dts_value[0]; 539 540 if ((len = OF_getproplen(node, "cdns,fifo-width")) <= 0) { 541 return (ENXIO); 542 } 543 OF_getencprop(node, "cdns,fifo-width", dts_value, len); 544 sc->fifo_width = dts_value[0]; 545 546 if ((len = OF_getproplen(node, "cdns,trigger-address")) <= 0) { 547 return (ENXIO); 548 } 549 OF_getencprop(node, "cdns,trigger-address", dts_value, len); 550 sc->trigger_address = dts_value[0]; 551 552 /* Disable controller */ 553 reg = READ4(sc, CQSPI_CFG); 554 reg &= ~(CFG_EN); 555 WRITE4(sc, CQSPI_CFG, reg); 556 557 reg = READ4(sc, CQSPI_DEVSZ); 558 reg &= ~(DEVSZ_NUMADDRBYTES_M); 559 reg |= ((4 - 1) - DEVSZ_NUMADDRBYTES_S); 560 WRITE4(sc, CQSPI_DEVSZ, reg); 561 562 WRITE4(sc, CQSPI_SRAMPART, sc->fifo_depth/2); 563 564 /* TODO: calculate baud rate and delay values. */ 565 566 reg = READ4(sc, CQSPI_CFG); 567 /* Configure baud rate */ 568 reg &= ~(CFG_BAUD_M); 569 reg |= CFG_BAUD12; 570 reg |= CFG_ENDMA; 571 WRITE4(sc, CQSPI_CFG, reg); 572 573 reg = (3 << DELAY_NSS_S); 574 reg |= (3 << DELAY_BTWN_S); 575 reg |= (1 << DELAY_AFTER_S); 576 reg |= (1 << DELAY_INIT_S); 577 WRITE4(sc, CQSPI_DELAY, reg); 578 579 READ4(sc, CQSPI_RDDATACAP); 580 reg &= ~(RDDATACAP_DELAY_M); 581 reg |= (1 << RDDATACAP_DELAY_S); 582 WRITE4(sc, CQSPI_RDDATACAP, reg); 583 584 /* Enable controller */ 585 reg = READ4(sc, CQSPI_CFG); 586 reg |= (CFG_EN); 587 WRITE4(sc, CQSPI_CFG, reg); 588 589 return (0); 590 } 591 592 static int 593 cqspi_add_devices(device_t dev) 594 { 595 phandle_t child, node; 596 device_t child_dev; 597 int error; 598 599 node = ofw_bus_get_node(dev); 600 601 for (child = OF_child(node); child != 0; child = OF_peer(child)) { 602 child_dev = 603 simplebus_add_device(dev, child, 0, NULL, -1, NULL); 604 if (child_dev == NULL) { 605 return (ENXIO); 606 } 607 608 error = device_probe_and_attach(child_dev); 609 if (error != 0) { 610 printf("can't probe and attach: %d\n", error); 611 } 612 } 613 614 return (0); 615 } 616 617 static void 618 cqspi_delayed_attach(void *arg) 619 { 620 struct cqspi_softc *sc; 621 622 sc = arg; 623 624 cqspi_add_devices(sc->dev); 625 bus_generic_attach(sc->dev); 626 627 config_intrhook_disestablish(&sc->config_intrhook); 628 } 629 630 static int 631 cqspi_probe(device_t dev) 632 { 633 634 if (!ofw_bus_status_okay(dev)) { 635 return (ENXIO); 636 } 637 638 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data) { 639 return (ENXIO); 640 } 641 642 device_set_desc(dev, "Cadence Quad SPI controller"); 643 644 return (0); 645 } 646 647 static int 648 cqspi_attach(device_t dev) 649 { 650 struct cqspi_softc *sc; 651 uint32_t caps; 652 int error; 653 654 sc = device_get_softc(dev); 655 sc->dev = dev; 656 657 if (bus_alloc_resources(dev, cqspi_spec, sc->res)) { 658 device_printf(dev, "could not allocate resources\n"); 659 return (ENXIO); 660 } 661 662 /* Memory interface */ 663 sc->bst = rman_get_bustag(sc->res[0]); 664 sc->bsh = rman_get_bushandle(sc->res[0]); 665 666 sc->sram_phys = rman_get_start(sc->res[1]); 667 668 /* Setup interrupt handlers */ 669 if (bus_setup_intr(sc->dev, sc->res[2], INTR_TYPE_BIO | INTR_MPSAFE, 670 NULL, cqspi_intr, sc, &sc->ih)) { 671 device_printf(sc->dev, "Unable to setup intr\n"); 672 return (ENXIO); 673 } 674 675 CQSPI_LOCK_INIT(sc); 676 677 caps = 0; 678 679 /* Get xDMA controller. */ 680 sc->xdma_tx = xdma_ofw_get(sc->dev, "tx"); 681 if (sc->xdma_tx == NULL) { 682 device_printf(dev, "Can't find DMA controller.\n"); 683 return (ENXIO); 684 } 685 686 sc->xdma_rx = xdma_ofw_get(sc->dev, "rx"); 687 if (sc->xdma_rx == NULL) { 688 device_printf(dev, "Can't find DMA controller.\n"); 689 return (ENXIO); 690 } 691 692 /* Alloc xDMA virtual channels. */ 693 sc->xchan_tx = xdma_channel_alloc(sc->xdma_tx, caps); 694 if (sc->xchan_tx == NULL) { 695 device_printf(dev, "Can't alloc virtual DMA channel.\n"); 696 return (ENXIO); 697 } 698 699 sc->xchan_rx = xdma_channel_alloc(sc->xdma_rx, caps); 700 if (sc->xchan_rx == NULL) { 701 device_printf(dev, "Can't alloc virtual DMA channel.\n"); 702 return (ENXIO); 703 } 704 705 /* Setup xDMA interrupt handlers. */ 706 error = xdma_setup_intr(sc->xchan_tx, 0, cqspi_xdma_tx_intr, 707 sc, &sc->ih_tx); 708 if (error) { 709 device_printf(sc->dev, 710 "Can't setup xDMA interrupt handler.\n"); 711 return (ENXIO); 712 } 713 714 error = xdma_setup_intr(sc->xchan_rx, 0, cqspi_xdma_rx_intr, 715 sc, &sc->ih_rx); 716 if (error) { 717 device_printf(sc->dev, 718 "Can't setup xDMA interrupt handler.\n"); 719 return (ENXIO); 720 } 721 722 xdma_prep_sg(sc->xchan_tx, TX_QUEUE_SIZE, maxphys, 8, 16, 0, 723 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR); 724 xdma_prep_sg(sc->xchan_rx, TX_QUEUE_SIZE, maxphys, 8, 16, 0, 725 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR); 726 727 cqspi_init(sc); 728 729 sc->config_intrhook.ich_func = cqspi_delayed_attach; 730 sc->config_intrhook.ich_arg = sc; 731 if (config_intrhook_establish(&sc->config_intrhook) != 0) { 732 device_printf(dev, "config_intrhook_establish failed\n"); 733 return (ENOMEM); 734 } 735 736 return (0); 737 } 738 739 static int 740 cqspi_detach(device_t dev) 741 { 742 743 return (ENXIO); 744 } 745 746 static device_method_t cqspi_methods[] = { 747 /* Device interface */ 748 DEVMETHOD(device_probe, cqspi_probe), 749 DEVMETHOD(device_attach, cqspi_attach), 750 DEVMETHOD(device_detach, cqspi_detach), 751 752 /* Quad SPI Flash Interface */ 753 DEVMETHOD(qspi_read_reg, cqspi_read_reg), 754 DEVMETHOD(qspi_write_reg, cqspi_write_reg), 755 DEVMETHOD(qspi_read, cqspi_read), 756 DEVMETHOD(qspi_write, cqspi_write), 757 DEVMETHOD(qspi_erase, cqspi_erase), 758 759 { 0, 0 } 760 }; 761 762 DEFINE_CLASS_1(cqspi, cqspi_driver, cqspi_methods, 763 sizeof(struct cqspi_softc), simplebus_driver); 764 765 DRIVER_MODULE(cqspi, simplebus, cqspi_driver, 0, 0);
Cache object: 31b91ca7ae06ae0883250578ec6eacf4
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