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 device_t sc_parent; 85 uint8_t sc_manufacturer_id; 86 uint16_t sc_device_id; 87 unsigned int sc_sectorsize; 88 struct mtx sc_mtx; 89 struct disk *sc_disk; 90 struct proc *sc_p; 91 struct bio_queue_head sc_bio_queue; 92 unsigned int sc_flags; 93 unsigned int sc_taskstate; 94 uint8_t sc_dummybuf[FLASH_PAGE_SIZE]; 95 }; 96 97 #define TSTATE_STOPPED 0 98 #define TSTATE_STOPPING 1 99 #define TSTATE_RUNNING 2 100 101 #define M25PXX_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 102 #define M25PXX_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 103 #define M25PXX_LOCK_INIT(_sc) \ 104 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \ 105 "mx25l", MTX_DEF) 106 #define M25PXX_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 107 #define M25PXX_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 108 #define M25PXX_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 109 110 /* disk routines */ 111 static int mx25l_open(struct disk *dp); 112 static int mx25l_close(struct disk *dp); 113 static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *); 114 static void mx25l_strategy(struct bio *bp); 115 static int mx25l_getattr(struct bio *bp); 116 static void mx25l_task(void *arg); 117 118 struct mx25l_flash_ident flash_devices[] = { 119 { "en25f32", 0x1c, 0x3116, 64 * 1024, 64, FL_NONE }, 120 { "en25p32", 0x1c, 0x2016, 64 * 1024, 64, FL_NONE }, 121 { "en25p64", 0x1c, 0x2017, 64 * 1024, 128, FL_NONE }, 122 { "en25q32", 0x1c, 0x3016, 64 * 1024, 64, FL_NONE }, 123 { "en25q64", 0x1c, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 124 { "m25p32", 0x20, 0x2016, 64 * 1024, 64, FL_NONE }, 125 { "m25p64", 0x20, 0x2017, 64 * 1024, 128, FL_NONE }, 126 { "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64, FL_NONE }, 127 { "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128, FL_NONE }, 128 { "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256, FL_ERASE_4K | FL_ERASE_32K }, 129 { "mx25ll256", 0xc2, 0x2019, 64 * 1024, 512, FL_ERASE_4K | FL_ERASE_32K | FL_ENABLE_4B_ADDR }, 130 { "s25fl032", 0x01, 0x0215, 64 * 1024, 64, FL_NONE }, 131 { "s25fl064", 0x01, 0x0216, 64 * 1024, 128, FL_NONE }, 132 { "s25fl128", 0x01, 0x2018, 64 * 1024, 256, FL_NONE }, 133 { "s25fl256s", 0x01, 0x0219, 64 * 1024, 512, FL_NONE }, 134 { "SST25VF010A", 0xbf, 0x2549, 4 * 1024, 32, FL_ERASE_4K | FL_ERASE_32K }, 135 { "SST25VF032B", 0xbf, 0x254a, 64 * 1024, 64, FL_ERASE_4K | FL_ERASE_32K }, 136 137 /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */ 138 { "w25x32", 0xef, 0x3016, 64 * 1024, 64, FL_ERASE_4K }, 139 { "w25x64", 0xef, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 140 { "w25q32", 0xef, 0x4016, 64 * 1024, 64, FL_ERASE_4K }, 141 { "w25q64", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 142 { "w25q64bv", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 143 { "w25q128", 0xef, 0x4018, 64 * 1024, 256, FL_ERASE_4K }, 144 { "w25q256", 0xef, 0x4019, 64 * 1024, 512, FL_ERASE_4K }, 145 146 /* Atmel */ 147 { "at25df641", 0x1f, 0x4800, 64 * 1024, 128, FL_ERASE_4K }, 148 149 /* GigaDevice */ 150 { "gd25q64", 0xc8, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 151 }; 152 153 static uint8_t 154 mx25l_get_status(struct mx25l_softc *sc) 155 { 156 uint8_t txBuf[2], rxBuf[2]; 157 struct spi_command cmd; 158 int err; 159 160 memset(&cmd, 0, sizeof(cmd)); 161 memset(txBuf, 0, sizeof(txBuf)); 162 memset(rxBuf, 0, sizeof(rxBuf)); 163 164 txBuf[0] = CMD_READ_STATUS; 165 cmd.tx_cmd = txBuf; 166 cmd.rx_cmd = rxBuf; 167 cmd.rx_cmd_sz = 2; 168 cmd.tx_cmd_sz = 2; 169 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 170 return (rxBuf[1]); 171 } 172 173 static void 174 mx25l_wait_for_device_ready(struct mx25l_softc *sc) 175 { 176 while ((mx25l_get_status(sc) & STATUS_WIP)) 177 continue; 178 } 179 180 static struct mx25l_flash_ident* 181 mx25l_get_device_ident(struct mx25l_softc *sc) 182 { 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(sc->sc_parent, sc->sc_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 device_printf(sc->sc_dev, 217 "Unknown SPI flash device. Vendor: %02x, device id: %04x\n", 218 manufacturer_id, dev_id); 219 return (NULL); 220 } 221 222 static void 223 mx25l_set_writable(struct mx25l_softc *sc, int writable) 224 { 225 uint8_t txBuf[1], rxBuf[1]; 226 struct spi_command cmd; 227 int err; 228 229 memset(&cmd, 0, sizeof(cmd)); 230 memset(txBuf, 0, sizeof(txBuf)); 231 memset(rxBuf, 0, sizeof(rxBuf)); 232 233 txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE; 234 cmd.tx_cmd = txBuf; 235 cmd.rx_cmd = rxBuf; 236 cmd.rx_cmd_sz = 1; 237 cmd.tx_cmd_sz = 1; 238 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 239 } 240 241 static void 242 mx25l_erase_cmd(struct mx25l_softc *sc, off_t sector, uint8_t ecmd) 243 { 244 uint8_t txBuf[5], rxBuf[5]; 245 struct spi_command cmd; 246 int err; 247 248 mx25l_set_writable(sc, 1); 249 250 memset(&cmd, 0, sizeof(cmd)); 251 memset(txBuf, 0, sizeof(txBuf)); 252 memset(rxBuf, 0, sizeof(rxBuf)); 253 254 txBuf[0] = ecmd; 255 cmd.tx_cmd = txBuf; 256 cmd.rx_cmd = rxBuf; 257 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 258 cmd.rx_cmd_sz = 5; 259 cmd.tx_cmd_sz = 5; 260 txBuf[1] = ((sector >> 24) & 0xff); 261 txBuf[2] = ((sector >> 16) & 0xff); 262 txBuf[3] = ((sector >> 8) & 0xff); 263 txBuf[4] = (sector & 0xff); 264 } else { 265 cmd.rx_cmd_sz = 4; 266 cmd.tx_cmd_sz = 4; 267 txBuf[1] = ((sector >> 16) & 0xff); 268 txBuf[2] = ((sector >> 8) & 0xff); 269 txBuf[3] = (sector & 0xff); 270 } 271 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 272 mx25l_wait_for_device_ready(sc); 273 } 274 275 static int 276 mx25l_write(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 277 { 278 uint8_t txBuf[8], rxBuf[8]; 279 struct spi_command cmd; 280 off_t bytes_to_write; 281 int err = 0; 282 283 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 284 cmd.tx_cmd_sz = 5; 285 cmd.rx_cmd_sz = 5; 286 } else { 287 cmd.tx_cmd_sz = 4; 288 cmd.rx_cmd_sz = 4; 289 } 290 291 /* 292 * Writes must be aligned to the erase sectorsize, since blocks are 293 * fully erased before they're written to. 294 */ 295 if (count % sc->sc_sectorsize != 0 || offset % sc->sc_sectorsize != 0) 296 return (EIO); 297 298 /* 299 * Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop 300 * to write chunks of FLASH_PAGE_SIZE bytes each. 301 */ 302 while (count != 0) { 303 /* If we crossed a sector boundary, erase the next sector. */ 304 if (((offset) % sc->sc_sectorsize) == 0) 305 mx25l_erase_cmd(sc, offset, CMD_SECTOR_ERASE); 306 307 txBuf[0] = CMD_PAGE_PROGRAM; 308 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 309 txBuf[1] = (offset >> 24) & 0xff; 310 txBuf[2] = (offset >> 16) & 0xff; 311 txBuf[3] = (offset >> 8) & 0xff; 312 txBuf[4] = offset & 0xff; 313 } else { 314 txBuf[1] = (offset >> 16) & 0xff; 315 txBuf[2] = (offset >> 8) & 0xff; 316 txBuf[3] = offset & 0xff; 317 } 318 319 bytes_to_write = MIN(FLASH_PAGE_SIZE, count); 320 cmd.tx_cmd = txBuf; 321 cmd.rx_cmd = rxBuf; 322 cmd.tx_data = data; 323 cmd.rx_data = sc->sc_dummybuf; 324 cmd.tx_data_sz = (uint32_t)bytes_to_write; 325 cmd.rx_data_sz = (uint32_t)bytes_to_write; 326 327 /* 328 * Each completed write operation resets WEL (write enable 329 * latch) to disabled state, so we re-enable it here. 330 */ 331 mx25l_wait_for_device_ready(sc); 332 mx25l_set_writable(sc, 1); 333 334 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 335 mx25l_wait_for_device_ready(sc); 336 if (err) 337 break; 338 339 data += bytes_to_write; 340 offset += bytes_to_write; 341 count -= bytes_to_write; 342 } 343 344 return (err); 345 } 346 347 static int 348 mx25l_read(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 349 { 350 uint8_t txBuf[8], rxBuf[8]; 351 struct spi_command cmd; 352 int err = 0; 353 354 /* 355 * Enforce that reads are aligned to the disk sectorsize, not the 356 * erase sectorsize. In this way, smaller read IO is possible, 357 * dramatically speeding up filesystem/geom_compress access. 358 */ 359 if (count % sc->sc_disk->d_sectorsize != 0 || 360 offset % sc->sc_disk->d_sectorsize != 0) 361 return (EIO); 362 363 txBuf[0] = CMD_FAST_READ; 364 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 365 cmd.tx_cmd_sz = 6; 366 cmd.rx_cmd_sz = 6; 367 368 txBuf[1] = (offset >> 24) & 0xff; 369 txBuf[2] = (offset >> 16) & 0xff; 370 txBuf[3] = (offset >> 8) & 0xff; 371 txBuf[4] = offset & 0xff; 372 /* Dummy byte */ 373 txBuf[5] = 0; 374 } else { 375 cmd.tx_cmd_sz = 5; 376 cmd.rx_cmd_sz = 5; 377 378 txBuf[1] = (offset >> 16) & 0xff; 379 txBuf[2] = (offset >> 8) & 0xff; 380 txBuf[3] = offset & 0xff; 381 /* Dummy byte */ 382 txBuf[4] = 0; 383 } 384 385 cmd.tx_cmd = txBuf; 386 cmd.rx_cmd = rxBuf; 387 cmd.tx_data = data; 388 cmd.rx_data = data; 389 cmd.tx_data_sz = count; 390 cmd.rx_data_sz = count; 391 392 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 393 394 return (err); 395 } 396 397 static int 398 mx25l_set_4b_mode(struct mx25l_softc *sc, uint8_t command) 399 { 400 uint8_t txBuf[1], rxBuf[1]; 401 struct spi_command cmd; 402 int err; 403 404 memset(&cmd, 0, sizeof(cmd)); 405 memset(txBuf, 0, sizeof(txBuf)); 406 memset(rxBuf, 0, sizeof(rxBuf)); 407 408 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1; 409 410 cmd.tx_cmd = txBuf; 411 cmd.rx_cmd = rxBuf; 412 413 txBuf[0] = command; 414 415 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 416 417 mx25l_wait_for_device_ready(sc); 418 419 return (err); 420 } 421 422 #ifdef FDT 423 static struct ofw_compat_data compat_data[] = { 424 { "st,m25p", 1 }, 425 { "jedec,spi-nor", 1 }, 426 { NULL, 0 }, 427 }; 428 #endif 429 430 static int 431 mx25l_probe(device_t dev) 432 { 433 #ifdef FDT 434 int i; 435 436 if (!ofw_bus_status_okay(dev)) 437 return (ENXIO); 438 439 /* First try to match the compatible property to the compat_data */ 440 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1) 441 goto found; 442 443 /* 444 * Next, try to find a compatible device using the names in the 445 * flash_devices structure 446 */ 447 for (i = 0; i < nitems(flash_devices); i++) 448 if (ofw_bus_is_compatible(dev, flash_devices[i].name)) 449 goto found; 450 451 return (ENXIO); 452 found: 453 #endif 454 device_set_desc(dev, "M25Pxx Flash Family"); 455 456 return (0); 457 } 458 459 static int 460 mx25l_attach(device_t dev) 461 { 462 struct mx25l_softc *sc; 463 struct mx25l_flash_ident *ident; 464 465 sc = device_get_softc(dev); 466 sc->sc_dev = dev; 467 sc->sc_parent = device_get_parent(sc->sc_dev); 468 469 M25PXX_LOCK_INIT(sc); 470 471 ident = mx25l_get_device_ident(sc); 472 if (ident == NULL) 473 return (ENXIO); 474 475 mx25l_wait_for_device_ready(sc); 476 477 sc->sc_disk = disk_alloc(); 478 sc->sc_disk->d_open = mx25l_open; 479 sc->sc_disk->d_close = mx25l_close; 480 sc->sc_disk->d_strategy = mx25l_strategy; 481 sc->sc_disk->d_getattr = mx25l_getattr; 482 sc->sc_disk->d_ioctl = mx25l_ioctl; 483 sc->sc_disk->d_name = "flash/spi"; 484 sc->sc_disk->d_drv1 = sc; 485 sc->sc_disk->d_maxsize = DFLTPHYS; 486 sc->sc_disk->d_sectorsize = MX25L_SECTORSIZE; 487 sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount; 488 sc->sc_disk->d_unit = device_get_unit(sc->sc_dev); 489 sc->sc_disk->d_dump = NULL; /* NB: no dumps */ 490 /* Sectorsize for erase operations */ 491 sc->sc_sectorsize = ident->sectorsize; 492 sc->sc_flags = ident->flags; 493 494 if (sc->sc_flags & FL_ENABLE_4B_ADDR) 495 mx25l_set_4b_mode(sc, CMD_ENTER_4B_MODE); 496 497 if (sc->sc_flags & FL_DISABLE_4B_ADDR) 498 mx25l_set_4b_mode(sc, CMD_EXIT_4B_MODE); 499 500 /* NB: use stripesize to hold the erase/region size for RedBoot */ 501 sc->sc_disk->d_stripesize = ident->sectorsize; 502 503 disk_create(sc->sc_disk, DISK_VERSION); 504 bioq_init(&sc->sc_bio_queue); 505 506 kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash"); 507 sc->sc_taskstate = TSTATE_RUNNING; 508 509 device_printf(sc->sc_dev, "%s, sector %d bytes, %d sectors\n", 510 ident->name, ident->sectorsize, ident->sectorcount); 511 512 return (0); 513 } 514 515 static int 516 mx25l_detach(device_t dev) 517 { 518 struct mx25l_softc *sc; 519 int err; 520 521 sc = device_get_softc(dev); 522 err = 0; 523 524 M25PXX_LOCK(sc); 525 if (sc->sc_taskstate == TSTATE_RUNNING) { 526 sc->sc_taskstate = TSTATE_STOPPING; 527 wakeup(sc); 528 while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) { 529 err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3); 530 if (err != 0) { 531 sc->sc_taskstate = TSTATE_RUNNING; 532 device_printf(sc->sc_dev, 533 "Failed to stop queue task\n"); 534 } 535 } 536 } 537 M25PXX_UNLOCK(sc); 538 539 if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) { 540 disk_destroy(sc->sc_disk); 541 bioq_flush(&sc->sc_bio_queue, NULL, ENXIO); 542 M25PXX_LOCK_DESTROY(sc); 543 } 544 return (err); 545 } 546 547 static int 548 mx25l_open(struct disk *dp) 549 { 550 return (0); 551 } 552 553 static int 554 mx25l_close(struct disk *dp) 555 { 556 557 return (0); 558 } 559 560 static int 561 mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag, 562 struct thread *td) 563 { 564 565 return (EINVAL); 566 } 567 568 static void 569 mx25l_strategy(struct bio *bp) 570 { 571 struct mx25l_softc *sc; 572 573 sc = (struct mx25l_softc *)bp->bio_disk->d_drv1; 574 M25PXX_LOCK(sc); 575 bioq_disksort(&sc->sc_bio_queue, bp); 576 wakeup(sc); 577 M25PXX_UNLOCK(sc); 578 } 579 580 static int 581 mx25l_getattr(struct bio *bp) 582 { 583 struct mx25l_softc *sc; 584 device_t dev; 585 586 if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL) 587 return (ENXIO); 588 589 sc = bp->bio_disk->d_drv1; 590 dev = sc->sc_dev; 591 592 if (strcmp(bp->bio_attribute, "SPI::device") == 0) { 593 if (bp->bio_length != sizeof(dev)) 594 return (EFAULT); 595 bcopy(&dev, bp->bio_data, sizeof(dev)); 596 } else 597 return (-1); 598 return (0); 599 } 600 601 static void 602 mx25l_task(void *arg) 603 { 604 struct mx25l_softc *sc = (struct mx25l_softc*)arg; 605 struct bio *bp; 606 device_t dev; 607 608 for (;;) { 609 dev = sc->sc_dev; 610 M25PXX_LOCK(sc); 611 do { 612 if (sc->sc_taskstate == TSTATE_STOPPING) { 613 sc->sc_taskstate = TSTATE_STOPPED; 614 M25PXX_UNLOCK(sc); 615 wakeup(sc); 616 kproc_exit(0); 617 } 618 bp = bioq_first(&sc->sc_bio_queue); 619 if (bp == NULL) 620 msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0); 621 } while (bp == NULL); 622 bioq_remove(&sc->sc_bio_queue, bp); 623 M25PXX_UNLOCK(sc); 624 625 switch (bp->bio_cmd) { 626 case BIO_READ: 627 bp->bio_error = mx25l_read(sc, bp->bio_offset, 628 bp->bio_data, bp->bio_bcount); 629 break; 630 case BIO_WRITE: 631 bp->bio_error = mx25l_write(sc, bp->bio_offset, 632 bp->bio_data, bp->bio_bcount); 633 break; 634 default: 635 bp->bio_error = EINVAL; 636 } 637 638 639 biodone(bp); 640 } 641 } 642 643 static devclass_t mx25l_devclass; 644 645 static device_method_t mx25l_methods[] = { 646 /* Device interface */ 647 DEVMETHOD(device_probe, mx25l_probe), 648 DEVMETHOD(device_attach, mx25l_attach), 649 DEVMETHOD(device_detach, mx25l_detach), 650 651 { 0, 0 } 652 }; 653 654 static driver_t mx25l_driver = { 655 "mx25l", 656 mx25l_methods, 657 sizeof(struct mx25l_softc), 658 }; 659 660 DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0); 661 MODULE_DEPEND(mx25l, spibus, 1, 1, 1); 662