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 int 154 mx25l_wait_for_device_ready(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)); 161 162 do { 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(sc->sc_parent, sc->sc_dev, &cmd); 169 } while (err == 0 && (rxBuf[1] & STATUS_WIP)); 170 171 return (err); 172 } 173 174 static struct mx25l_flash_ident* 175 mx25l_get_device_ident(struct mx25l_softc *sc) 176 { 177 uint8_t txBuf[8], rxBuf[8]; 178 struct spi_command cmd; 179 uint8_t manufacturer_id; 180 uint16_t dev_id; 181 int err, i; 182 183 memset(&cmd, 0, sizeof(cmd)); 184 memset(txBuf, 0, sizeof(txBuf)); 185 memset(rxBuf, 0, sizeof(rxBuf)); 186 187 txBuf[0] = CMD_READ_IDENT; 188 cmd.tx_cmd = &txBuf; 189 cmd.rx_cmd = &rxBuf; 190 /* 191 * Some compatible devices has extended two-bytes ID 192 * We'll use only manufacturer/deviceid atm 193 */ 194 cmd.tx_cmd_sz = 4; 195 cmd.rx_cmd_sz = 4; 196 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 197 if (err) 198 return (NULL); 199 200 manufacturer_id = rxBuf[1]; 201 dev_id = (rxBuf[2] << 8) | (rxBuf[3]); 202 203 for (i = 0; i < nitems(flash_devices); i++) { 204 if ((flash_devices[i].manufacturer_id == manufacturer_id) && 205 (flash_devices[i].device_id == dev_id)) 206 return &flash_devices[i]; 207 } 208 209 device_printf(sc->sc_dev, 210 "Unknown SPI flash device. Vendor: %02x, device id: %04x\n", 211 manufacturer_id, dev_id); 212 return (NULL); 213 } 214 215 static int 216 mx25l_set_writable(struct mx25l_softc *sc, int writable) 217 { 218 uint8_t txBuf[1], rxBuf[1]; 219 struct spi_command cmd; 220 int err; 221 222 memset(&cmd, 0, sizeof(cmd)); 223 memset(txBuf, 0, sizeof(txBuf)); 224 memset(rxBuf, 0, sizeof(rxBuf)); 225 226 txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE; 227 cmd.tx_cmd = txBuf; 228 cmd.rx_cmd = rxBuf; 229 cmd.rx_cmd_sz = 1; 230 cmd.tx_cmd_sz = 1; 231 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 232 return (err); 233 } 234 235 static int 236 mx25l_erase_cmd(struct mx25l_softc *sc, off_t sector, uint8_t ecmd) 237 { 238 uint8_t txBuf[5], rxBuf[5]; 239 struct spi_command cmd; 240 int err; 241 242 if ((err = mx25l_set_writable(sc, 1)) != 0) 243 return (err); 244 245 memset(&cmd, 0, sizeof(cmd)); 246 memset(txBuf, 0, sizeof(txBuf)); 247 memset(rxBuf, 0, sizeof(rxBuf)); 248 249 txBuf[0] = ecmd; 250 cmd.tx_cmd = txBuf; 251 cmd.rx_cmd = rxBuf; 252 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 253 cmd.rx_cmd_sz = 5; 254 cmd.tx_cmd_sz = 5; 255 txBuf[1] = ((sector >> 24) & 0xff); 256 txBuf[2] = ((sector >> 16) & 0xff); 257 txBuf[3] = ((sector >> 8) & 0xff); 258 txBuf[4] = (sector & 0xff); 259 } else { 260 cmd.rx_cmd_sz = 4; 261 cmd.tx_cmd_sz = 4; 262 txBuf[1] = ((sector >> 16) & 0xff); 263 txBuf[2] = ((sector >> 8) & 0xff); 264 txBuf[3] = (sector & 0xff); 265 } 266 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) != 0) 267 return (err); 268 err = mx25l_wait_for_device_ready(sc); 269 return (err); 270 } 271 272 static int 273 mx25l_write(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 274 { 275 uint8_t txBuf[8], rxBuf[8]; 276 struct spi_command cmd; 277 off_t bytes_to_write; 278 int err = 0; 279 280 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 281 cmd.tx_cmd_sz = 5; 282 cmd.rx_cmd_sz = 5; 283 } else { 284 cmd.tx_cmd_sz = 4; 285 cmd.rx_cmd_sz = 4; 286 } 287 288 /* 289 * Writes must be aligned to the erase sectorsize, since blocks are 290 * fully erased before they're written to. 291 */ 292 if (count % sc->sc_sectorsize != 0 || offset % sc->sc_sectorsize != 0) 293 return (EIO); 294 295 /* 296 * Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop 297 * to write chunks of FLASH_PAGE_SIZE bytes each. 298 */ 299 while (count != 0) { 300 /* If we crossed a sector boundary, erase the next sector. */ 301 if (((offset) % sc->sc_sectorsize) == 0) { 302 err = mx25l_erase_cmd(sc, offset, CMD_SECTOR_ERASE); 303 if (err) 304 break; 305 } 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 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 332 break; 333 if ((err = mx25l_set_writable(sc, 1)) != 0) 334 break; 335 336 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 337 if (err != 0) 338 break; 339 err = mx25l_wait_for_device_ready(sc); 340 if (err) 341 break; 342 343 data += bytes_to_write; 344 offset += bytes_to_write; 345 count -= bytes_to_write; 346 } 347 348 return (err); 349 } 350 351 static int 352 mx25l_read(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 353 { 354 uint8_t txBuf[8], rxBuf[8]; 355 struct spi_command cmd; 356 int err = 0; 357 358 /* 359 * Enforce that reads are aligned to the disk sectorsize, not the 360 * erase sectorsize. In this way, smaller read IO is possible, 361 * dramatically speeding up filesystem/geom_compress access. 362 */ 363 if (count % sc->sc_disk->d_sectorsize != 0 || 364 offset % sc->sc_disk->d_sectorsize != 0) 365 return (EIO); 366 367 txBuf[0] = CMD_FAST_READ; 368 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 369 cmd.tx_cmd_sz = 6; 370 cmd.rx_cmd_sz = 6; 371 372 txBuf[1] = (offset >> 24) & 0xff; 373 txBuf[2] = (offset >> 16) & 0xff; 374 txBuf[3] = (offset >> 8) & 0xff; 375 txBuf[4] = offset & 0xff; 376 /* Dummy byte */ 377 txBuf[5] = 0; 378 } else { 379 cmd.tx_cmd_sz = 5; 380 cmd.rx_cmd_sz = 5; 381 382 txBuf[1] = (offset >> 16) & 0xff; 383 txBuf[2] = (offset >> 8) & 0xff; 384 txBuf[3] = offset & 0xff; 385 /* Dummy byte */ 386 txBuf[4] = 0; 387 } 388 389 cmd.tx_cmd = txBuf; 390 cmd.rx_cmd = rxBuf; 391 cmd.tx_data = data; 392 cmd.rx_data = data; 393 cmd.tx_data_sz = count; 394 cmd.rx_data_sz = count; 395 396 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 397 return (err); 398 } 399 400 static int 401 mx25l_set_4b_mode(struct mx25l_softc *sc, uint8_t command) 402 { 403 uint8_t txBuf[1], rxBuf[1]; 404 struct spi_command cmd; 405 int err; 406 407 memset(&cmd, 0, sizeof(cmd)); 408 memset(txBuf, 0, sizeof(txBuf)); 409 memset(rxBuf, 0, sizeof(rxBuf)); 410 411 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1; 412 413 cmd.tx_cmd = txBuf; 414 cmd.rx_cmd = rxBuf; 415 416 txBuf[0] = command; 417 418 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) == 0) 419 err = mx25l_wait_for_device_ready(sc); 420 421 return (err); 422 } 423 424 #ifdef FDT 425 static struct ofw_compat_data compat_data[] = { 426 { "st,m25p", 1 }, 427 { "jedec,spi-nor", 1 }, 428 { NULL, 0 }, 429 }; 430 #endif 431 432 static int 433 mx25l_probe(device_t dev) 434 { 435 #ifdef FDT 436 int i; 437 438 if (!ofw_bus_status_okay(dev)) 439 return (ENXIO); 440 441 /* First try to match the compatible property to the compat_data */ 442 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1) 443 goto found; 444 445 /* 446 * Next, try to find a compatible device using the names in the 447 * flash_devices structure 448 */ 449 for (i = 0; i < nitems(flash_devices); i++) 450 if (ofw_bus_is_compatible(dev, flash_devices[i].name)) 451 goto found; 452 453 return (ENXIO); 454 found: 455 #endif 456 device_set_desc(dev, "M25Pxx Flash Family"); 457 458 return (0); 459 } 460 461 static int 462 mx25l_attach(device_t dev) 463 { 464 struct mx25l_softc *sc; 465 struct mx25l_flash_ident *ident; 466 int err; 467 468 sc = device_get_softc(dev); 469 sc->sc_dev = dev; 470 sc->sc_parent = device_get_parent(sc->sc_dev); 471 472 M25PXX_LOCK_INIT(sc); 473 474 ident = mx25l_get_device_ident(sc); 475 if (ident == NULL) 476 return (ENXIO); 477 478 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 479 return (err); 480 481 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 482 if ((err = mx25l_set_4b_mode(sc, CMD_ENTER_4B_MODE)) != 0) 483 return (err); 484 } else if (sc->sc_flags & FL_DISABLE_4B_ADDR) { 485 if ((err = mx25l_set_4b_mode(sc, CMD_EXIT_4B_MODE)) != 0) 486 return (err); 487 } 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 /* NB: use stripesize to hold the erase/region size for RedBoot */ 507 sc->sc_disk->d_stripesize = ident->sectorsize; 508 509 disk_create(sc->sc_disk, DISK_VERSION); 510 bioq_init(&sc->sc_bio_queue); 511 512 kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash"); 513 sc->sc_taskstate = TSTATE_RUNNING; 514 515 device_printf(sc->sc_dev, "%s, sector %d bytes, %d sectors\n", 516 ident->name, ident->sectorsize, ident->sectorcount); 517 518 return (0); 519 } 520 521 static int 522 mx25l_detach(device_t dev) 523 { 524 struct mx25l_softc *sc; 525 int err; 526 527 sc = device_get_softc(dev); 528 err = 0; 529 530 M25PXX_LOCK(sc); 531 if (sc->sc_taskstate == TSTATE_RUNNING) { 532 sc->sc_taskstate = TSTATE_STOPPING; 533 wakeup(sc); 534 while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) { 535 err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3); 536 if (err != 0) { 537 sc->sc_taskstate = TSTATE_RUNNING; 538 device_printf(sc->sc_dev, 539 "Failed to stop queue task\n"); 540 } 541 } 542 } 543 M25PXX_UNLOCK(sc); 544 545 if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) { 546 disk_destroy(sc->sc_disk); 547 bioq_flush(&sc->sc_bio_queue, NULL, ENXIO); 548 M25PXX_LOCK_DESTROY(sc); 549 } 550 return (err); 551 } 552 553 static int 554 mx25l_open(struct disk *dp) 555 { 556 return (0); 557 } 558 559 static int 560 mx25l_close(struct disk *dp) 561 { 562 563 return (0); 564 } 565 566 static int 567 mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag, 568 struct thread *td) 569 { 570 571 return (EINVAL); 572 } 573 574 static void 575 mx25l_strategy(struct bio *bp) 576 { 577 struct mx25l_softc *sc; 578 579 sc = (struct mx25l_softc *)bp->bio_disk->d_drv1; 580 M25PXX_LOCK(sc); 581 bioq_disksort(&sc->sc_bio_queue, bp); 582 wakeup(sc); 583 M25PXX_UNLOCK(sc); 584 } 585 586 static int 587 mx25l_getattr(struct bio *bp) 588 { 589 struct mx25l_softc *sc; 590 device_t dev; 591 592 if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL) 593 return (ENXIO); 594 595 sc = bp->bio_disk->d_drv1; 596 dev = sc->sc_dev; 597 598 if (strcmp(bp->bio_attribute, "SPI::device") == 0) { 599 if (bp->bio_length != sizeof(dev)) 600 return (EFAULT); 601 bcopy(&dev, bp->bio_data, sizeof(dev)); 602 } else 603 return (-1); 604 return (0); 605 } 606 607 static void 608 mx25l_task(void *arg) 609 { 610 struct mx25l_softc *sc = (struct mx25l_softc*)arg; 611 struct bio *bp; 612 device_t dev; 613 614 for (;;) { 615 dev = sc->sc_dev; 616 M25PXX_LOCK(sc); 617 do { 618 if (sc->sc_taskstate == TSTATE_STOPPING) { 619 sc->sc_taskstate = TSTATE_STOPPED; 620 M25PXX_UNLOCK(sc); 621 wakeup(sc); 622 kproc_exit(0); 623 } 624 bp = bioq_first(&sc->sc_bio_queue); 625 if (bp == NULL) 626 msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0); 627 } while (bp == NULL); 628 bioq_remove(&sc->sc_bio_queue, bp); 629 M25PXX_UNLOCK(sc); 630 631 switch (bp->bio_cmd) { 632 case BIO_READ: 633 bp->bio_error = mx25l_read(sc, bp->bio_offset, 634 bp->bio_data, bp->bio_bcount); 635 break; 636 case BIO_WRITE: 637 bp->bio_error = mx25l_write(sc, bp->bio_offset, 638 bp->bio_data, bp->bio_bcount); 639 break; 640 default: 641 bp->bio_error = EINVAL; 642 } 643 644 645 biodone(bp); 646 } 647 } 648 649 static devclass_t mx25l_devclass; 650 651 static device_method_t mx25l_methods[] = { 652 /* Device interface */ 653 DEVMETHOD(device_probe, mx25l_probe), 654 DEVMETHOD(device_attach, mx25l_attach), 655 DEVMETHOD(device_detach, mx25l_detach), 656 657 { 0, 0 } 658 }; 659 660 static driver_t mx25l_driver = { 661 "mx25l", 662 mx25l_methods, 663 sizeof(struct mx25l_softc), 664 }; 665 666 DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0); 667 MODULE_DEPEND(mx25l, spibus, 1, 1, 1); 668