1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006 M. Warner Losh. All rights reserved. 5 * Copyright (c) 2009 Oleksandr Tymoshenko. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_platform.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bio.h> 36 #include <sys/bus.h> 37 #include <sys/conf.h> 38 #include <sys/kernel.h> 39 #include <sys/kthread.h> 40 #include <sys/lock.h> 41 #include <sys/mbuf.h> 42 #include <sys/malloc.h> 43 #include <sys/module.h> 44 #include <sys/mutex.h> 45 #include <geom/geom_disk.h> 46 47 #ifdef FDT 48 #include <dev/fdt/fdt_common.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 #include <dev/ofw/openfirm.h> 51 #endif 52 53 #include <dev/spibus/spi.h> 54 #include "spibus_if.h" 55 56 #include <dev/flash/mx25lreg.h> 57 58 #define FL_NONE 0x00 59 #define FL_ERASE_4K 0x01 60 #define FL_ERASE_32K 0x02 61 #define FL_ENABLE_4B_ADDR 0x04 62 #define FL_DISABLE_4B_ADDR 0x08 63 64 /* 65 * Define the sectorsize to be a smaller size rather than the flash 66 * sector size. Trying to run FFS off of a 64k flash sector size 67 * results in a completely un-usable system. 68 */ 69 #define MX25L_SECTORSIZE 512 70 71 struct mx25l_flash_ident 72 { 73 const char *name; 74 uint8_t manufacturer_id; 75 uint16_t device_id; 76 unsigned int sectorsize; 77 unsigned int sectorcount; 78 unsigned int flags; 79 }; 80 81 struct mx25l_softc 82 { 83 device_t sc_dev; 84 uint8_t sc_manufacturer_id; 85 uint16_t sc_device_id; 86 unsigned int sc_sectorsize; 87 struct mtx sc_mtx; 88 struct disk *sc_disk; 89 struct proc *sc_p; 90 struct bio_queue_head sc_bio_queue; 91 unsigned int sc_flags; 92 unsigned int sc_taskstate; 93 uint8_t sc_dummybuf[FLASH_PAGE_SIZE]; 94 }; 95 96 #define TSTATE_STOPPED 0 97 #define TSTATE_STOPPING 1 98 #define TSTATE_RUNNING 2 99 100 #define M25PXX_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 101 #define M25PXX_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 102 #define M25PXX_LOCK_INIT(_sc) \ 103 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \ 104 "mx25l", MTX_DEF) 105 #define M25PXX_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 106 #define M25PXX_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 107 #define M25PXX_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 108 109 /* disk routines */ 110 static int mx25l_open(struct disk *dp); 111 static int mx25l_close(struct disk *dp); 112 static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *); 113 static void mx25l_strategy(struct bio *bp); 114 static int mx25l_getattr(struct bio *bp); 115 static void mx25l_task(void *arg); 116 117 struct mx25l_flash_ident flash_devices[] = { 118 { "en25f32", 0x1c, 0x3116, 64 * 1024, 64, FL_NONE }, 119 { "en25p32", 0x1c, 0x2016, 64 * 1024, 64, FL_NONE }, 120 { "en25p64", 0x1c, 0x2017, 64 * 1024, 128, FL_NONE }, 121 { "en25q32", 0x1c, 0x3016, 64 * 1024, 64, FL_NONE }, 122 { "en25q64", 0x1c, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 123 { "m25p32", 0x20, 0x2016, 64 * 1024, 64, FL_NONE }, 124 { "m25p64", 0x20, 0x2017, 64 * 1024, 128, FL_NONE }, 125 { "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64, FL_NONE }, 126 { "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128, FL_NONE }, 127 { "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256, FL_ERASE_4K | FL_ERASE_32K }, 128 { "mx25ll256", 0xc2, 0x2019, 64 * 1024, 512, FL_ERASE_4K | FL_ERASE_32K | FL_ENABLE_4B_ADDR }, 129 { "s25fl032", 0x01, 0x0215, 64 * 1024, 64, FL_NONE }, 130 { "s25fl064", 0x01, 0x0216, 64 * 1024, 128, FL_NONE }, 131 { "s25fl128", 0x01, 0x2018, 64 * 1024, 256, FL_NONE }, 132 { "s25fl256s", 0x01, 0x0219, 64 * 1024, 512, FL_NONE }, 133 { "SST25VF010A", 0xbf, 0x2549, 4 * 1024, 32, FL_ERASE_4K | FL_ERASE_32K }, 134 { "SST25VF032B", 0xbf, 0x254a, 64 * 1024, 64, FL_ERASE_4K | FL_ERASE_32K }, 135 136 /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */ 137 { "w25x32", 0xef, 0x3016, 64 * 1024, 64, FL_ERASE_4K }, 138 { "w25x64", 0xef, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 139 { "w25q32", 0xef, 0x4016, 64 * 1024, 64, FL_ERASE_4K }, 140 { "w25q64", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 141 { "w25q64bv", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 142 { "w25q128", 0xef, 0x4018, 64 * 1024, 256, FL_ERASE_4K }, 143 { "w25q256", 0xef, 0x4019, 64 * 1024, 512, FL_ERASE_4K }, 144 145 /* Atmel */ 146 { "at25df641", 0x1f, 0x4800, 64 * 1024, 128, FL_ERASE_4K }, 147 148 /* GigaDevice */ 149 { "gd25q64", 0xc8, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 150 }; 151 152 static uint8_t 153 mx25l_get_status(device_t dev) 154 { 155 uint8_t txBuf[2], rxBuf[2]; 156 struct spi_command cmd; 157 int err; 158 159 memset(&cmd, 0, sizeof(cmd)); 160 memset(txBuf, 0, sizeof(txBuf)); 161 memset(rxBuf, 0, sizeof(rxBuf)); 162 163 txBuf[0] = CMD_READ_STATUS; 164 cmd.tx_cmd = txBuf; 165 cmd.rx_cmd = rxBuf; 166 cmd.rx_cmd_sz = 2; 167 cmd.tx_cmd_sz = 2; 168 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd); 169 return (rxBuf[1]); 170 } 171 172 static void 173 mx25l_wait_for_device_ready(device_t dev) 174 { 175 while ((mx25l_get_status(dev) & STATUS_WIP)) 176 continue; 177 } 178 179 static struct mx25l_flash_ident* 180 mx25l_get_device_ident(struct mx25l_softc *sc) 181 { 182 device_t dev = sc->sc_dev; 183 uint8_t txBuf[8], rxBuf[8]; 184 struct spi_command cmd; 185 uint8_t manufacturer_id; 186 uint16_t dev_id; 187 int err, i; 188 189 memset(&cmd, 0, sizeof(cmd)); 190 memset(txBuf, 0, sizeof(txBuf)); 191 memset(rxBuf, 0, sizeof(rxBuf)); 192 193 txBuf[0] = CMD_READ_IDENT; 194 cmd.tx_cmd = &txBuf; 195 cmd.rx_cmd = &rxBuf; 196 /* 197 * Some compatible devices has extended two-bytes ID 198 * We'll use only manufacturer/deviceid atm 199 */ 200 cmd.tx_cmd_sz = 4; 201 cmd.rx_cmd_sz = 4; 202 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd); 203 if (err) 204 return (NULL); 205 206 manufacturer_id = rxBuf[1]; 207 dev_id = (rxBuf[2] << 8) | (rxBuf[3]); 208 209 for (i = 0; 210 i < nitems(flash_devices); i++) { 211 if ((flash_devices[i].manufacturer_id == manufacturer_id) && 212 (flash_devices[i].device_id == dev_id)) 213 return &flash_devices[i]; 214 } 215 216 printf("Unknown SPI flash device. Vendor: %02x, device id: %04x\n", 217 manufacturer_id, dev_id); 218 return (NULL); 219 } 220 221 static void 222 mx25l_set_writable(device_t dev, int writable) 223 { 224 uint8_t txBuf[1], rxBuf[1]; 225 struct spi_command cmd; 226 int err; 227 228 memset(&cmd, 0, sizeof(cmd)); 229 memset(txBuf, 0, sizeof(txBuf)); 230 memset(rxBuf, 0, sizeof(rxBuf)); 231 232 txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE; 233 cmd.tx_cmd = txBuf; 234 cmd.rx_cmd = rxBuf; 235 cmd.rx_cmd_sz = 1; 236 cmd.tx_cmd_sz = 1; 237 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd); 238 } 239 240 static void 241 mx25l_erase_cmd(device_t dev, off_t sector, uint8_t ecmd) 242 { 243 struct mx25l_softc *sc; 244 uint8_t txBuf[5], rxBuf[5]; 245 struct spi_command cmd; 246 int err; 247 248 sc = device_get_softc(dev); 249 250 mx25l_wait_for_device_ready(dev); 251 mx25l_set_writable(dev, 1); 252 253 memset(&cmd, 0, sizeof(cmd)); 254 memset(txBuf, 0, sizeof(txBuf)); 255 memset(rxBuf, 0, sizeof(rxBuf)); 256 257 txBuf[0] = ecmd; 258 cmd.tx_cmd = txBuf; 259 cmd.rx_cmd = rxBuf; 260 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 261 cmd.rx_cmd_sz = 5; 262 cmd.tx_cmd_sz = 5; 263 txBuf[1] = ((sector >> 24) & 0xff); 264 txBuf[2] = ((sector >> 16) & 0xff); 265 txBuf[3] = ((sector >> 8) & 0xff); 266 txBuf[4] = (sector & 0xff); 267 } else { 268 cmd.rx_cmd_sz = 4; 269 cmd.tx_cmd_sz = 4; 270 txBuf[1] = ((sector >> 16) & 0xff); 271 txBuf[2] = ((sector >> 8) & 0xff); 272 txBuf[3] = (sector & 0xff); 273 } 274 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd); 275 } 276 277 static int 278 mx25l_write(device_t dev, off_t offset, caddr_t data, off_t count) 279 { 280 struct mx25l_softc *sc; 281 uint8_t txBuf[8], rxBuf[8]; 282 struct spi_command cmd; 283 off_t bytes_to_write; 284 device_t pdev; 285 int err = 0; 286 287 pdev = device_get_parent(dev); 288 sc = device_get_softc(dev); 289 290 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 291 cmd.tx_cmd_sz = 5; 292 cmd.rx_cmd_sz = 5; 293 } else { 294 cmd.tx_cmd_sz = 4; 295 cmd.rx_cmd_sz = 4; 296 } 297 298 /* 299 * Writes must be aligned to the erase sectorsize, since blocks are 300 * fully erased before they're written to. 301 */ 302 if (count % sc->sc_sectorsize != 0 || offset % sc->sc_sectorsize != 0) 303 return (EIO); 304 305 /* 306 * Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop 307 * to write chunks of FLASH_PAGE_SIZE bytes each. 308 */ 309 while (count != 0) { 310 /* If we crossed a sector boundary, erase the next sector. */ 311 if (((offset) % sc->sc_sectorsize) == 0) 312 mx25l_erase_cmd(dev, offset, CMD_SECTOR_ERASE); 313 314 txBuf[0] = CMD_PAGE_PROGRAM; 315 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 316 txBuf[1] = (offset >> 24) & 0xff; 317 txBuf[2] = (offset >> 16) & 0xff; 318 txBuf[3] = (offset >> 8) & 0xff; 319 txBuf[4] = offset & 0xff; 320 } else { 321 txBuf[1] = (offset >> 16) & 0xff; 322 txBuf[2] = (offset >> 8) & 0xff; 323 txBuf[3] = offset & 0xff; 324 } 325 326 bytes_to_write = MIN(FLASH_PAGE_SIZE, count); 327 cmd.tx_cmd = txBuf; 328 cmd.rx_cmd = rxBuf; 329 cmd.tx_data = data; 330 cmd.rx_data = sc->sc_dummybuf; 331 cmd.tx_data_sz = (uint32_t)bytes_to_write; 332 cmd.rx_data_sz = (uint32_t)bytes_to_write; 333 334 /* 335 * Each completed write operation resets WEL (write enable 336 * latch) to disabled state, so we re-enable it here. 337 */ 338 mx25l_wait_for_device_ready(dev); 339 mx25l_set_writable(dev, 1); 340 341 err = SPIBUS_TRANSFER(pdev, dev, &cmd); 342 if (err) 343 break; 344 345 data += bytes_to_write; 346 offset += bytes_to_write; 347 count -= bytes_to_write; 348 } 349 350 return (err); 351 } 352 353 static int 354 mx25l_read(device_t dev, off_t offset, caddr_t data, off_t count) 355 { 356 struct mx25l_softc *sc; 357 uint8_t txBuf[8], rxBuf[8]; 358 struct spi_command cmd; 359 device_t pdev; 360 int err = 0; 361 362 pdev = device_get_parent(dev); 363 sc = device_get_softc(dev); 364 365 /* 366 * Enforce that reads are aligned to the disk sectorsize, not the 367 * erase sectorsize. In this way, smaller read IO is possible, 368 * dramatically speeding up filesystem/geom_compress access. 369 */ 370 if (count % sc->sc_disk->d_sectorsize != 0 || 371 offset % sc->sc_disk->d_sectorsize != 0) 372 return (EIO); 373 374 txBuf[0] = CMD_FAST_READ; 375 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 376 cmd.tx_cmd_sz = 6; 377 cmd.rx_cmd_sz = 6; 378 379 txBuf[1] = (offset >> 24) & 0xff; 380 txBuf[2] = (offset >> 16) & 0xff; 381 txBuf[3] = (offset >> 8) & 0xff; 382 txBuf[4] = offset & 0xff; 383 /* Dummy byte */ 384 txBuf[5] = 0; 385 } else { 386 cmd.tx_cmd_sz = 5; 387 cmd.rx_cmd_sz = 5; 388 389 txBuf[1] = (offset >> 16) & 0xff; 390 txBuf[2] = (offset >> 8) & 0xff; 391 txBuf[3] = offset & 0xff; 392 /* Dummy byte */ 393 txBuf[4] = 0; 394 } 395 396 cmd.tx_cmd = txBuf; 397 cmd.rx_cmd = rxBuf; 398 cmd.tx_data = data; 399 cmd.rx_data = data; 400 cmd.tx_data_sz = count; 401 cmd.rx_data_sz = count; 402 403 err = SPIBUS_TRANSFER(pdev, dev, &cmd); 404 405 return (err); 406 } 407 408 static int 409 mx25l_set_4b_mode(device_t dev, uint8_t command) 410 { 411 uint8_t txBuf[1], rxBuf[1]; 412 struct spi_command cmd; 413 device_t pdev; 414 int err; 415 416 memset(&cmd, 0, sizeof(cmd)); 417 memset(txBuf, 0, sizeof(txBuf)); 418 memset(rxBuf, 0, sizeof(rxBuf)); 419 420 pdev = device_get_parent(dev); 421 422 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1; 423 424 cmd.tx_cmd = txBuf; 425 cmd.rx_cmd = rxBuf; 426 427 txBuf[0] = command; 428 429 err = SPIBUS_TRANSFER(pdev, dev, &cmd); 430 431 mx25l_wait_for_device_ready(dev); 432 433 return (err); 434 } 435 436 #ifdef FDT 437 static struct ofw_compat_data compat_data[] = { 438 { "st,m25p", 1 }, 439 { "jedec,spi-nor", 1 }, 440 { NULL, 0 }, 441 }; 442 #endif 443 444 static int 445 mx25l_probe(device_t dev) 446 { 447 #ifdef FDT 448 int i; 449 450 if (!ofw_bus_status_okay(dev)) 451 return (ENXIO); 452 453 /* First try to match the compatible property to the compat_data */ 454 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1) 455 goto found; 456 457 /* 458 * Next, try to find a compatible device using the names in the 459 * flash_devices structure 460 */ 461 for (i = 0; i < nitems(flash_devices); i++) 462 if (ofw_bus_is_compatible(dev, flash_devices[i].name)) 463 goto found; 464 465 return (ENXIO); 466 found: 467 #endif 468 device_set_desc(dev, "M25Pxx Flash Family"); 469 470 return (0); 471 } 472 473 static int 474 mx25l_attach(device_t dev) 475 { 476 struct mx25l_softc *sc; 477 struct mx25l_flash_ident *ident; 478 479 sc = device_get_softc(dev); 480 sc->sc_dev = dev; 481 M25PXX_LOCK_INIT(sc); 482 483 ident = mx25l_get_device_ident(sc); 484 if (ident == NULL) 485 return (ENXIO); 486 487 mx25l_wait_for_device_ready(sc->sc_dev); 488 489 sc->sc_disk = disk_alloc(); 490 sc->sc_disk->d_open = mx25l_open; 491 sc->sc_disk->d_close = mx25l_close; 492 sc->sc_disk->d_strategy = mx25l_strategy; 493 sc->sc_disk->d_getattr = mx25l_getattr; 494 sc->sc_disk->d_ioctl = mx25l_ioctl; 495 sc->sc_disk->d_name = "flash/spi"; 496 sc->sc_disk->d_drv1 = sc; 497 sc->sc_disk->d_maxsize = DFLTPHYS; 498 sc->sc_disk->d_sectorsize = MX25L_SECTORSIZE; 499 sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount; 500 sc->sc_disk->d_unit = device_get_unit(sc->sc_dev); 501 sc->sc_disk->d_dump = NULL; /* NB: no dumps */ 502 /* Sectorsize for erase operations */ 503 sc->sc_sectorsize = ident->sectorsize; 504 sc->sc_flags = ident->flags; 505 506 if (sc->sc_flags & FL_ENABLE_4B_ADDR) 507 mx25l_set_4b_mode(dev, CMD_ENTER_4B_MODE); 508 509 if (sc->sc_flags & FL_DISABLE_4B_ADDR) 510 mx25l_set_4b_mode(dev, CMD_EXIT_4B_MODE); 511 512 /* NB: use stripesize to hold the erase/region size for RedBoot */ 513 sc->sc_disk->d_stripesize = ident->sectorsize; 514 515 disk_create(sc->sc_disk, DISK_VERSION); 516 bioq_init(&sc->sc_bio_queue); 517 518 kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash"); 519 sc->sc_taskstate = TSTATE_RUNNING; 520 521 device_printf(sc->sc_dev, "%s, sector %d bytes, %d sectors\n", 522 ident->name, ident->sectorsize, ident->sectorcount); 523 524 return (0); 525 } 526 527 static int 528 mx25l_detach(device_t dev) 529 { 530 struct mx25l_softc *sc; 531 int err; 532 533 sc = device_get_softc(dev); 534 err = 0; 535 536 M25PXX_LOCK(sc); 537 if (sc->sc_taskstate == TSTATE_RUNNING) { 538 sc->sc_taskstate = TSTATE_STOPPING; 539 wakeup(sc); 540 while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) { 541 err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3); 542 if (err != 0) { 543 sc->sc_taskstate = TSTATE_RUNNING; 544 device_printf(dev, 545 "Failed to stop queue task\n"); 546 } 547 } 548 } 549 M25PXX_UNLOCK(sc); 550 551 if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) { 552 disk_destroy(sc->sc_disk); 553 bioq_flush(&sc->sc_bio_queue, NULL, ENXIO); 554 M25PXX_LOCK_DESTROY(sc); 555 } 556 return (err); 557 } 558 559 static int 560 mx25l_open(struct disk *dp) 561 { 562 return (0); 563 } 564 565 static int 566 mx25l_close(struct disk *dp) 567 { 568 569 return (0); 570 } 571 572 static int 573 mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag, 574 struct thread *td) 575 { 576 577 return (EINVAL); 578 } 579 580 static void 581 mx25l_strategy(struct bio *bp) 582 { 583 struct mx25l_softc *sc; 584 585 sc = (struct mx25l_softc *)bp->bio_disk->d_drv1; 586 M25PXX_LOCK(sc); 587 bioq_disksort(&sc->sc_bio_queue, bp); 588 wakeup(sc); 589 M25PXX_UNLOCK(sc); 590 } 591 592 static int 593 mx25l_getattr(struct bio *bp) 594 { 595 struct mx25l_softc *sc; 596 device_t dev; 597 598 if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL) 599 return (ENXIO); 600 601 sc = bp->bio_disk->d_drv1; 602 dev = sc->sc_dev; 603 604 if (strcmp(bp->bio_attribute, "SPI::device") == 0) { 605 if (bp->bio_length != sizeof(dev)) 606 return (EFAULT); 607 bcopy(&dev, bp->bio_data, sizeof(dev)); 608 } else 609 return (-1); 610 return (0); 611 } 612 613 static void 614 mx25l_task(void *arg) 615 { 616 struct mx25l_softc *sc = (struct mx25l_softc*)arg; 617 struct bio *bp; 618 device_t dev; 619 620 for (;;) { 621 dev = sc->sc_dev; 622 M25PXX_LOCK(sc); 623 do { 624 if (sc->sc_taskstate == TSTATE_STOPPING) { 625 sc->sc_taskstate = TSTATE_STOPPED; 626 M25PXX_UNLOCK(sc); 627 wakeup(sc); 628 kproc_exit(0); 629 } 630 bp = bioq_first(&sc->sc_bio_queue); 631 if (bp == NULL) 632 msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0); 633 } while (bp == NULL); 634 bioq_remove(&sc->sc_bio_queue, bp); 635 M25PXX_UNLOCK(sc); 636 637 switch (bp->bio_cmd) { 638 case BIO_READ: 639 bp->bio_error = mx25l_read(dev, bp->bio_offset, 640 bp->bio_data, bp->bio_bcount); 641 break; 642 case BIO_WRITE: 643 bp->bio_error = mx25l_write(dev, bp->bio_offset, 644 bp->bio_data, bp->bio_bcount); 645 break; 646 default: 647 bp->bio_error = EINVAL; 648 } 649 650 651 biodone(bp); 652 } 653 } 654 655 static devclass_t mx25l_devclass; 656 657 static device_method_t mx25l_methods[] = { 658 /* Device interface */ 659 DEVMETHOD(device_probe, mx25l_probe), 660 DEVMETHOD(device_attach, mx25l_attach), 661 DEVMETHOD(device_detach, mx25l_detach), 662 663 { 0, 0 } 664 }; 665 666 static driver_t mx25l_driver = { 667 "mx25l", 668 mx25l_methods, 669 sizeof(struct mx25l_softc), 670 }; 671 672 DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0); 673 MODULE_DEPEND(mx25l, spibus, 1, 1, 1); 674