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 * Copyright (c) 2018 Ian Lepore. 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 WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_platform.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/bio.h> 37 #include <sys/bus.h> 38 #include <sys/conf.h> 39 #include <sys/kernel.h> 40 #include <sys/kthread.h> 41 #include <sys/lock.h> 42 #include <sys/mbuf.h> 43 #include <sys/malloc.h> 44 #include <sys/module.h> 45 #include <sys/mutex.h> 46 #include <geom/geom_disk.h> 47 48 #ifdef FDT 49 #include <dev/fdt/fdt_common.h> 50 #include <dev/ofw/ofw_bus_subr.h> 51 #include <dev/ofw/openfirm.h> 52 #endif 53 54 #include <dev/spibus/spi.h> 55 #include "spibus_if.h" 56 57 #include <dev/flash/mx25lreg.h> 58 59 #define FL_NONE 0x00 60 #define FL_ERASE_4K 0x01 61 #define FL_ERASE_32K 0x02 62 #define FL_ENABLE_4B_ADDR 0x04 63 #define FL_DISABLE_4B_ADDR 0x08 64 65 /* 66 * Define the sectorsize to be a smaller size rather than the flash 67 * sector size. Trying to run FFS off of a 64k flash sector size 68 * results in a completely un-usable system. 69 */ 70 #define MX25L_SECTORSIZE 512 71 72 struct mx25l_flash_ident 73 { 74 const char *name; 75 uint8_t manufacturer_id; 76 uint16_t device_id; 77 unsigned int sectorsize; 78 unsigned int sectorcount; 79 unsigned int flags; 80 }; 81 82 struct mx25l_softc 83 { 84 device_t sc_dev; 85 device_t sc_parent; 86 uint8_t sc_manufacturer_id; 87 uint16_t sc_device_id; 88 unsigned int sc_erasesize; 89 struct mtx sc_mtx; 90 struct disk *sc_disk; 91 struct proc *sc_p; 92 struct bio_queue_head sc_bio_queue; 93 unsigned int sc_flags; 94 unsigned int sc_taskstate; 95 uint8_t sc_dummybuf[FLASH_PAGE_SIZE]; 96 }; 97 98 #define TSTATE_STOPPED 0 99 #define TSTATE_STOPPING 1 100 #define TSTATE_RUNNING 2 101 102 #define M25PXX_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 103 #define M25PXX_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 104 #define M25PXX_LOCK_INIT(_sc) \ 105 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \ 106 "mx25l", MTX_DEF) 107 #define M25PXX_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 108 #define M25PXX_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 109 #define M25PXX_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 110 111 /* disk routines */ 112 static int mx25l_open(struct disk *dp); 113 static int mx25l_close(struct disk *dp); 114 static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *); 115 static void mx25l_strategy(struct bio *bp); 116 static int mx25l_getattr(struct bio *bp); 117 static void mx25l_task(void *arg); 118 119 struct mx25l_flash_ident flash_devices[] = { 120 { "en25f32", 0x1c, 0x3116, 64 * 1024, 64, FL_NONE }, 121 { "en25p32", 0x1c, 0x2016, 64 * 1024, 64, FL_NONE }, 122 { "en25p64", 0x1c, 0x2017, 64 * 1024, 128, FL_NONE }, 123 { "en25q32", 0x1c, 0x3016, 64 * 1024, 64, FL_NONE }, 124 { "en25q64", 0x1c, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 125 { "m25p32", 0x20, 0x2016, 64 * 1024, 64, FL_NONE }, 126 { "m25p64", 0x20, 0x2017, 64 * 1024, 128, FL_NONE }, 127 { "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64, FL_NONE }, 128 { "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128, FL_NONE }, 129 { "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256, FL_ERASE_4K | FL_ERASE_32K }, 130 { "mx25ll256", 0xc2, 0x2019, 64 * 1024, 512, FL_ERASE_4K | FL_ERASE_32K | FL_ENABLE_4B_ADDR }, 131 { "s25fl032", 0x01, 0x0215, 64 * 1024, 64, FL_NONE }, 132 { "s25fl064", 0x01, 0x0216, 64 * 1024, 128, FL_NONE }, 133 { "s25fl128", 0x01, 0x2018, 64 * 1024, 256, FL_NONE }, 134 { "s25fl256s", 0x01, 0x0219, 64 * 1024, 512, FL_NONE }, 135 { "SST25VF010A", 0xbf, 0x2549, 4 * 1024, 32, FL_ERASE_4K | FL_ERASE_32K }, 136 { "SST25VF032B", 0xbf, 0x254a, 64 * 1024, 64, FL_ERASE_4K | FL_ERASE_32K }, 137 138 /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */ 139 { "w25x32", 0xef, 0x3016, 64 * 1024, 64, FL_ERASE_4K }, 140 { "w25x64", 0xef, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 141 { "w25q32", 0xef, 0x4016, 64 * 1024, 64, FL_ERASE_4K }, 142 { "w25q64", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 143 { "w25q64bv", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 144 { "w25q128", 0xef, 0x4018, 64 * 1024, 256, FL_ERASE_4K }, 145 { "w25q256", 0xef, 0x4019, 64 * 1024, 512, FL_ERASE_4K }, 146 147 /* Atmel */ 148 { "at25df641", 0x1f, 0x4800, 64 * 1024, 128, FL_ERASE_4K }, 149 150 /* GigaDevice */ 151 { "gd25q64", 0xc8, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 152 }; 153 154 static int 155 mx25l_wait_for_device_ready(struct mx25l_softc *sc) 156 { 157 uint8_t txBuf[2], rxBuf[2]; 158 struct spi_command cmd; 159 int err; 160 161 memset(&cmd, 0, sizeof(cmd)); 162 163 do { 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 } while (err == 0 && (rxBuf[1] & STATUS_WIP)); 171 172 return (err); 173 } 174 175 static struct mx25l_flash_ident* 176 mx25l_get_device_ident(struct mx25l_softc *sc) 177 { 178 uint8_t txBuf[8], rxBuf[8]; 179 struct spi_command cmd; 180 uint8_t manufacturer_id; 181 uint16_t dev_id; 182 int err, i; 183 184 memset(&cmd, 0, sizeof(cmd)); 185 memset(txBuf, 0, sizeof(txBuf)); 186 memset(rxBuf, 0, sizeof(rxBuf)); 187 188 txBuf[0] = CMD_READ_IDENT; 189 cmd.tx_cmd = &txBuf; 190 cmd.rx_cmd = &rxBuf; 191 /* 192 * Some compatible devices has extended two-bytes ID 193 * We'll use only manufacturer/deviceid atm 194 */ 195 cmd.tx_cmd_sz = 4; 196 cmd.rx_cmd_sz = 4; 197 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 198 if (err) 199 return (NULL); 200 201 manufacturer_id = rxBuf[1]; 202 dev_id = (rxBuf[2] << 8) | (rxBuf[3]); 203 204 for (i = 0; i < nitems(flash_devices); i++) { 205 if ((flash_devices[i].manufacturer_id == manufacturer_id) && 206 (flash_devices[i].device_id == dev_id)) 207 return &flash_devices[i]; 208 } 209 210 device_printf(sc->sc_dev, 211 "Unknown SPI flash device. Vendor: %02x, device id: %04x\n", 212 manufacturer_id, dev_id); 213 return (NULL); 214 } 215 216 static int 217 mx25l_set_writable(struct mx25l_softc *sc, int writable) 218 { 219 uint8_t txBuf[1], rxBuf[1]; 220 struct spi_command cmd; 221 int err; 222 223 memset(&cmd, 0, sizeof(cmd)); 224 memset(txBuf, 0, sizeof(txBuf)); 225 memset(rxBuf, 0, sizeof(rxBuf)); 226 227 txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE; 228 cmd.tx_cmd = txBuf; 229 cmd.rx_cmd = rxBuf; 230 cmd.rx_cmd_sz = 1; 231 cmd.tx_cmd_sz = 1; 232 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 233 return (err); 234 } 235 236 static int 237 mx25l_erase_cmd(struct mx25l_softc *sc, off_t sector) 238 { 239 uint8_t txBuf[5], rxBuf[5]; 240 struct spi_command cmd; 241 int err; 242 243 if ((err = mx25l_set_writable(sc, 1)) != 0) 244 return (err); 245 246 memset(&cmd, 0, sizeof(cmd)); 247 memset(txBuf, 0, sizeof(txBuf)); 248 memset(rxBuf, 0, sizeof(rxBuf)); 249 250 cmd.tx_cmd = txBuf; 251 cmd.rx_cmd = rxBuf; 252 253 if (sc->sc_flags & FL_ERASE_4K) 254 txBuf[0] = CMD_BLOCK_4K_ERASE; 255 else if (sc->sc_flags & FL_ERASE_32K) 256 txBuf[0] = CMD_BLOCK_32K_ERASE; 257 else 258 txBuf[0] = CMD_SECTOR_ERASE; 259 260 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 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) != 0) 275 return (err); 276 err = mx25l_wait_for_device_ready(sc); 277 return (err); 278 } 279 280 static int 281 mx25l_write(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 282 { 283 uint8_t txBuf[8], rxBuf[8]; 284 struct spi_command cmd; 285 off_t bytes_to_write; 286 int err = 0; 287 288 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 289 cmd.tx_cmd_sz = 5; 290 cmd.rx_cmd_sz = 5; 291 } else { 292 cmd.tx_cmd_sz = 4; 293 cmd.rx_cmd_sz = 4; 294 } 295 296 /* 297 * Writes must be aligned to the erase sectorsize, since blocks are 298 * fully erased before they're written to. 299 */ 300 if (count % sc->sc_erasesize != 0 || offset % sc->sc_erasesize != 0) 301 return (EIO); 302 303 /* 304 * Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop 305 * to write chunks of FLASH_PAGE_SIZE bytes each. 306 */ 307 while (count != 0) { 308 /* If we crossed a sector boundary, erase the next sector. */ 309 if (((offset) % sc->sc_erasesize) == 0) { 310 err = mx25l_erase_cmd(sc, offset); 311 if (err) 312 break; 313 } 314 315 txBuf[0] = CMD_PAGE_PROGRAM; 316 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 317 txBuf[1] = (offset >> 24) & 0xff; 318 txBuf[2] = (offset >> 16) & 0xff; 319 txBuf[3] = (offset >> 8) & 0xff; 320 txBuf[4] = offset & 0xff; 321 } else { 322 txBuf[1] = (offset >> 16) & 0xff; 323 txBuf[2] = (offset >> 8) & 0xff; 324 txBuf[3] = offset & 0xff; 325 } 326 327 bytes_to_write = MIN(FLASH_PAGE_SIZE, count); 328 cmd.tx_cmd = txBuf; 329 cmd.rx_cmd = rxBuf; 330 cmd.tx_data = data; 331 cmd.rx_data = sc->sc_dummybuf; 332 cmd.tx_data_sz = (uint32_t)bytes_to_write; 333 cmd.rx_data_sz = (uint32_t)bytes_to_write; 334 335 /* 336 * Each completed write operation resets WEL (write enable 337 * latch) to disabled state, so we re-enable it here. 338 */ 339 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 340 break; 341 if ((err = mx25l_set_writable(sc, 1)) != 0) 342 break; 343 344 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 345 if (err != 0) 346 break; 347 err = mx25l_wait_for_device_ready(sc); 348 if (err) 349 break; 350 351 data += bytes_to_write; 352 offset += bytes_to_write; 353 count -= bytes_to_write; 354 } 355 356 return (err); 357 } 358 359 static int 360 mx25l_read(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 361 { 362 uint8_t txBuf[8], rxBuf[8]; 363 struct spi_command cmd; 364 int err = 0; 365 366 /* 367 * Enforce that reads are aligned to the disk sectorsize, not the 368 * erase sectorsize. In this way, smaller read IO is possible, 369 * dramatically speeding up filesystem/geom_compress access. 370 */ 371 if (count % sc->sc_disk->d_sectorsize != 0 || 372 offset % sc->sc_disk->d_sectorsize != 0) 373 return (EIO); 374 375 txBuf[0] = CMD_FAST_READ; 376 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 377 cmd.tx_cmd_sz = 6; 378 cmd.rx_cmd_sz = 6; 379 380 txBuf[1] = (offset >> 24) & 0xff; 381 txBuf[2] = (offset >> 16) & 0xff; 382 txBuf[3] = (offset >> 8) & 0xff; 383 txBuf[4] = offset & 0xff; 384 /* Dummy byte */ 385 txBuf[5] = 0; 386 } else { 387 cmd.tx_cmd_sz = 5; 388 cmd.rx_cmd_sz = 5; 389 390 txBuf[1] = (offset >> 16) & 0xff; 391 txBuf[2] = (offset >> 8) & 0xff; 392 txBuf[3] = offset & 0xff; 393 /* Dummy byte */ 394 txBuf[4] = 0; 395 } 396 397 cmd.tx_cmd = txBuf; 398 cmd.rx_cmd = rxBuf; 399 cmd.tx_data = data; 400 cmd.rx_data = data; 401 cmd.tx_data_sz = count; 402 cmd.rx_data_sz = count; 403 404 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 405 return (err); 406 } 407 408 static int 409 mx25l_set_4b_mode(struct mx25l_softc *sc, uint8_t command) 410 { 411 uint8_t txBuf[1], rxBuf[1]; 412 struct spi_command cmd; 413 int err; 414 415 memset(&cmd, 0, sizeof(cmd)); 416 memset(txBuf, 0, sizeof(txBuf)); 417 memset(rxBuf, 0, sizeof(rxBuf)); 418 419 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1; 420 421 cmd.tx_cmd = txBuf; 422 cmd.rx_cmd = rxBuf; 423 424 txBuf[0] = command; 425 426 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) == 0) 427 err = mx25l_wait_for_device_ready(sc); 428 429 return (err); 430 } 431 432 #ifdef FDT 433 static struct ofw_compat_data compat_data[] = { 434 { "st,m25p", 1 }, 435 { "jedec,spi-nor", 1 }, 436 { NULL, 0 }, 437 }; 438 #endif 439 440 static int 441 mx25l_probe(device_t dev) 442 { 443 #ifdef FDT 444 int i; 445 446 if (!ofw_bus_status_okay(dev)) 447 return (ENXIO); 448 449 /* First try to match the compatible property to the compat_data */ 450 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1) 451 goto found; 452 453 /* 454 * Next, try to find a compatible device using the names in the 455 * flash_devices structure 456 */ 457 for (i = 0; i < nitems(flash_devices); i++) 458 if (ofw_bus_is_compatible(dev, flash_devices[i].name)) 459 goto found; 460 461 return (ENXIO); 462 found: 463 #endif 464 device_set_desc(dev, "M25Pxx Flash Family"); 465 466 return (0); 467 } 468 469 static int 470 mx25l_attach(device_t dev) 471 { 472 struct mx25l_softc *sc; 473 struct mx25l_flash_ident *ident; 474 int err; 475 476 sc = device_get_softc(dev); 477 sc->sc_dev = dev; 478 sc->sc_parent = device_get_parent(sc->sc_dev); 479 480 M25PXX_LOCK_INIT(sc); 481 482 ident = mx25l_get_device_ident(sc); 483 if (ident == NULL) 484 return (ENXIO); 485 486 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 487 return (err); 488 489 sc->sc_flags = ident->flags; 490 491 if (sc->sc_flags & FL_ERASE_4K) 492 sc->sc_erasesize = 4 * 1024; 493 else if (sc->sc_flags & FL_ERASE_32K) 494 sc->sc_erasesize = 32 * 1024; 495 else 496 sc->sc_erasesize = ident->sectorsize; 497 498 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 499 if ((err = mx25l_set_4b_mode(sc, CMD_ENTER_4B_MODE)) != 0) 500 return (err); 501 } else if (sc->sc_flags & FL_DISABLE_4B_ADDR) { 502 if ((err = mx25l_set_4b_mode(sc, CMD_EXIT_4B_MODE)) != 0) 503 return (err); 504 } 505 506 sc->sc_disk = disk_alloc(); 507 sc->sc_disk->d_open = mx25l_open; 508 sc->sc_disk->d_close = mx25l_close; 509 sc->sc_disk->d_strategy = mx25l_strategy; 510 sc->sc_disk->d_getattr = mx25l_getattr; 511 sc->sc_disk->d_ioctl = mx25l_ioctl; 512 sc->sc_disk->d_name = "flash/spi"; 513 sc->sc_disk->d_drv1 = sc; 514 sc->sc_disk->d_maxsize = DFLTPHYS; 515 sc->sc_disk->d_sectorsize = MX25L_SECTORSIZE; 516 sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount; 517 sc->sc_disk->d_stripesize = sc->sc_erasesize; 518 sc->sc_disk->d_unit = device_get_unit(sc->sc_dev); 519 sc->sc_disk->d_dump = NULL; /* NB: no dumps */ 520 strlcpy(sc->sc_disk->d_descr, ident->name, 521 sizeof(sc->sc_disk->d_descr)); 522 523 disk_create(sc->sc_disk, DISK_VERSION); 524 bioq_init(&sc->sc_bio_queue); 525 526 kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash"); 527 sc->sc_taskstate = TSTATE_RUNNING; 528 529 device_printf(sc->sc_dev, 530 "device type %s, size %dK in %d sectors of %dK, erase size %dK\n", 531 ident->name, 532 ident->sectorcount * ident->sectorsize / 1024, 533 ident->sectorcount, ident->sectorsize / 1024, 534 sc->sc_erasesize / 1024); 535 536 return (0); 537 } 538 539 static int 540 mx25l_detach(device_t dev) 541 { 542 struct mx25l_softc *sc; 543 int err; 544 545 sc = device_get_softc(dev); 546 err = 0; 547 548 M25PXX_LOCK(sc); 549 if (sc->sc_taskstate == TSTATE_RUNNING) { 550 sc->sc_taskstate = TSTATE_STOPPING; 551 wakeup(sc); 552 while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) { 553 err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3); 554 if (err != 0) { 555 sc->sc_taskstate = TSTATE_RUNNING; 556 device_printf(sc->sc_dev, 557 "Failed to stop queue task\n"); 558 } 559 } 560 } 561 M25PXX_UNLOCK(sc); 562 563 if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) { 564 disk_destroy(sc->sc_disk); 565 bioq_flush(&sc->sc_bio_queue, NULL, ENXIO); 566 M25PXX_LOCK_DESTROY(sc); 567 } 568 return (err); 569 } 570 571 static int 572 mx25l_open(struct disk *dp) 573 { 574 return (0); 575 } 576 577 static int 578 mx25l_close(struct disk *dp) 579 { 580 581 return (0); 582 } 583 584 static int 585 mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag, 586 struct thread *td) 587 { 588 589 return (EINVAL); 590 } 591 592 static void 593 mx25l_strategy(struct bio *bp) 594 { 595 struct mx25l_softc *sc; 596 597 sc = (struct mx25l_softc *)bp->bio_disk->d_drv1; 598 M25PXX_LOCK(sc); 599 bioq_disksort(&sc->sc_bio_queue, bp); 600 wakeup(sc); 601 M25PXX_UNLOCK(sc); 602 } 603 604 static int 605 mx25l_getattr(struct bio *bp) 606 { 607 struct mx25l_softc *sc; 608 device_t dev; 609 610 if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL) 611 return (ENXIO); 612 613 sc = bp->bio_disk->d_drv1; 614 dev = sc->sc_dev; 615 616 if (strcmp(bp->bio_attribute, "SPI::device") == 0) { 617 if (bp->bio_length != sizeof(dev)) 618 return (EFAULT); 619 bcopy(&dev, bp->bio_data, sizeof(dev)); 620 } else 621 return (-1); 622 return (0); 623 } 624 625 static void 626 mx25l_task(void *arg) 627 { 628 struct mx25l_softc *sc = (struct mx25l_softc*)arg; 629 struct bio *bp; 630 device_t dev; 631 632 for (;;) { 633 dev = sc->sc_dev; 634 M25PXX_LOCK(sc); 635 do { 636 if (sc->sc_taskstate == TSTATE_STOPPING) { 637 sc->sc_taskstate = TSTATE_STOPPED; 638 M25PXX_UNLOCK(sc); 639 wakeup(sc); 640 kproc_exit(0); 641 } 642 bp = bioq_first(&sc->sc_bio_queue); 643 if (bp == NULL) 644 msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0); 645 } while (bp == NULL); 646 bioq_remove(&sc->sc_bio_queue, bp); 647 M25PXX_UNLOCK(sc); 648 649 switch (bp->bio_cmd) { 650 case BIO_READ: 651 bp->bio_error = mx25l_read(sc, bp->bio_offset, 652 bp->bio_data, bp->bio_bcount); 653 break; 654 case BIO_WRITE: 655 bp->bio_error = mx25l_write(sc, bp->bio_offset, 656 bp->bio_data, bp->bio_bcount); 657 break; 658 default: 659 bp->bio_error = EINVAL; 660 } 661 662 663 biodone(bp); 664 } 665 } 666 667 static devclass_t mx25l_devclass; 668 669 static device_method_t mx25l_methods[] = { 670 /* Device interface */ 671 DEVMETHOD(device_probe, mx25l_probe), 672 DEVMETHOD(device_attach, mx25l_attach), 673 DEVMETHOD(device_detach, mx25l_detach), 674 675 { 0, 0 } 676 }; 677 678 static driver_t mx25l_driver = { 679 "mx25l", 680 mx25l_methods, 681 sizeof(struct mx25l_softc), 682 }; 683 684 DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0); 685 MODULE_DEPEND(mx25l, spibus, 1, 1, 1); 686