mx25l.c revision 346557
1/*- 2 * Copyright (c) 2006 M. Warner Losh. All rights reserved. 3 * Copyright (c) 2009 Oleksandr Tymoshenko. All rights reserved. 4 * Copyright (c) 2018 Ian Lepore. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/11/sys/dev/flash/mx25l.c 346557 2019-04-22 15:04:11Z ian $"); 29 30#include "opt_platform.h" 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/bio.h> 35#include <sys/bus.h> 36#include <sys/conf.h> 37#include <sys/kernel.h> 38#include <sys/kthread.h> 39#include <sys/lock.h> 40#include <sys/mbuf.h> 41#include <sys/malloc.h> 42#include <sys/module.h> 43#include <sys/mutex.h> 44#include <geom/geom_disk.h> 45 46#ifdef FDT 47#include <dev/fdt/fdt_common.h> 48#include <dev/ofw/ofw_bus_subr.h> 49#include <dev/ofw/openfirm.h> 50#endif 51 52#include <dev/spibus/spi.h> 53#include "spibus_if.h" 54 55#include <dev/flash/mx25lreg.h> 56 57#define FL_NONE 0x00 58#define FL_ERASE_4K 0x01 59#define FL_ERASE_32K 0x02 60#define FL_ENABLE_4B_ADDR 0x04 61#define FL_DISABLE_4B_ADDR 0x08 62 63/* 64 * Define the sectorsize to be a smaller size rather than the flash 65 * sector size. Trying to run FFS off of a 64k flash sector size 66 * results in a completely un-usable system. 67 */ 68#define MX25L_SECTORSIZE 512 69 70struct mx25l_flash_ident 71{ 72 const char *name; 73 uint8_t manufacturer_id; 74 uint16_t device_id; 75 unsigned int sectorsize; 76 unsigned int sectorcount; 77 unsigned int flags; 78}; 79 80struct mx25l_softc 81{ 82 device_t sc_dev; 83 device_t sc_parent; 84 uint8_t sc_manufacturer_id; 85 uint16_t sc_device_id; 86 unsigned int sc_erasesize; 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 */ 110static int mx25l_open(struct disk *dp); 111static int mx25l_close(struct disk *dp); 112static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *); 113static void mx25l_strategy(struct bio *bp); 114static int mx25l_getattr(struct bio *bp); 115static void mx25l_task(void *arg); 116 117struct 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 152static int 153mx25l_wait_for_device_ready(struct mx25l_softc *sc) 154{ 155 uint8_t txBuf[2], rxBuf[2]; 156 struct spi_command cmd; 157 int err; 158 159 memset(&cmd, 0, sizeof(cmd)); 160 161 do { 162 txBuf[0] = CMD_READ_STATUS; 163 cmd.tx_cmd = txBuf; 164 cmd.rx_cmd = rxBuf; 165 cmd.rx_cmd_sz = 2; 166 cmd.tx_cmd_sz = 2; 167 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 168 } while (err == 0 && (rxBuf[1] & STATUS_WIP)); 169 170 return (err); 171} 172 173static struct mx25l_flash_ident* 174mx25l_get_device_ident(struct mx25l_softc *sc) 175{ 176 uint8_t txBuf[8], rxBuf[8]; 177 struct spi_command cmd; 178 uint8_t manufacturer_id; 179 uint16_t dev_id; 180 int err, i; 181 182 memset(&cmd, 0, sizeof(cmd)); 183 memset(txBuf, 0, sizeof(txBuf)); 184 memset(rxBuf, 0, sizeof(rxBuf)); 185 186 txBuf[0] = CMD_READ_IDENT; 187 cmd.tx_cmd = &txBuf; 188 cmd.rx_cmd = &rxBuf; 189 /* 190 * Some compatible devices has extended two-bytes ID 191 * We'll use only manufacturer/deviceid atm 192 */ 193 cmd.tx_cmd_sz = 4; 194 cmd.rx_cmd_sz = 4; 195 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 196 if (err) 197 return (NULL); 198 199 manufacturer_id = rxBuf[1]; 200 dev_id = (rxBuf[2] << 8) | (rxBuf[3]); 201 202 for (i = 0; i < nitems(flash_devices); i++) { 203 if ((flash_devices[i].manufacturer_id == manufacturer_id) && 204 (flash_devices[i].device_id == dev_id)) 205 return &flash_devices[i]; 206 } 207 208 device_printf(sc->sc_dev, 209 "Unknown SPI flash device. Vendor: %02x, device id: %04x\n", 210 manufacturer_id, dev_id); 211 return (NULL); 212} 213 214static int 215mx25l_set_writable(struct mx25l_softc *sc, int writable) 216{ 217 uint8_t txBuf[1], rxBuf[1]; 218 struct spi_command cmd; 219 int err; 220 221 memset(&cmd, 0, sizeof(cmd)); 222 memset(txBuf, 0, sizeof(txBuf)); 223 memset(rxBuf, 0, sizeof(rxBuf)); 224 225 txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE; 226 cmd.tx_cmd = txBuf; 227 cmd.rx_cmd = rxBuf; 228 cmd.rx_cmd_sz = 1; 229 cmd.tx_cmd_sz = 1; 230 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 231 return (err); 232} 233 234static int 235mx25l_erase_cmd(struct mx25l_softc *sc, off_t sector) 236{ 237 uint8_t txBuf[5], rxBuf[5]; 238 struct spi_command cmd; 239 int err; 240 241 if ((err = mx25l_set_writable(sc, 1)) != 0) 242 return (err); 243 244 memset(&cmd, 0, sizeof(cmd)); 245 memset(txBuf, 0, sizeof(txBuf)); 246 memset(rxBuf, 0, sizeof(rxBuf)); 247 248 cmd.tx_cmd = txBuf; 249 cmd.rx_cmd = rxBuf; 250 251 if (sc->sc_flags & FL_ERASE_4K) 252 txBuf[0] = CMD_BLOCK_4K_ERASE; 253 else if (sc->sc_flags & FL_ERASE_32K) 254 txBuf[0] = CMD_BLOCK_32K_ERASE; 255 else 256 txBuf[0] = CMD_SECTOR_ERASE; 257 258 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 259 cmd.rx_cmd_sz = 5; 260 cmd.tx_cmd_sz = 5; 261 txBuf[1] = ((sector >> 24) & 0xff); 262 txBuf[2] = ((sector >> 16) & 0xff); 263 txBuf[3] = ((sector >> 8) & 0xff); 264 txBuf[4] = (sector & 0xff); 265 } else { 266 cmd.rx_cmd_sz = 4; 267 cmd.tx_cmd_sz = 4; 268 txBuf[1] = ((sector >> 16) & 0xff); 269 txBuf[2] = ((sector >> 8) & 0xff); 270 txBuf[3] = (sector & 0xff); 271 } 272 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) != 0) 273 return (err); 274 err = mx25l_wait_for_device_ready(sc); 275 return (err); 276} 277 278static int 279mx25l_write(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 280{ 281 uint8_t txBuf[8], rxBuf[8]; 282 struct spi_command cmd; 283 off_t bytes_to_write; 284 int err = 0; 285 286 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 287 cmd.tx_cmd_sz = 5; 288 cmd.rx_cmd_sz = 5; 289 } else { 290 cmd.tx_cmd_sz = 4; 291 cmd.rx_cmd_sz = 4; 292 } 293 294 /* 295 * Writes must be aligned to the erase sectorsize, since blocks are 296 * fully erased before they're written to. 297 */ 298 if (count % sc->sc_erasesize != 0 || offset % sc->sc_erasesize != 0) 299 return (EIO); 300 301 /* 302 * Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop 303 * to write chunks of FLASH_PAGE_SIZE bytes each. 304 */ 305 while (count != 0) { 306 /* If we crossed a sector boundary, erase the next sector. */ 307 if (((offset) % sc->sc_erasesize) == 0) { 308 err = mx25l_erase_cmd(sc, offset); 309 if (err) 310 break; 311 } 312 313 txBuf[0] = CMD_PAGE_PROGRAM; 314 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 315 txBuf[1] = (offset >> 24) & 0xff; 316 txBuf[2] = (offset >> 16) & 0xff; 317 txBuf[3] = (offset >> 8) & 0xff; 318 txBuf[4] = offset & 0xff; 319 } else { 320 txBuf[1] = (offset >> 16) & 0xff; 321 txBuf[2] = (offset >> 8) & 0xff; 322 txBuf[3] = offset & 0xff; 323 } 324 325 bytes_to_write = MIN(FLASH_PAGE_SIZE, count); 326 cmd.tx_cmd = txBuf; 327 cmd.rx_cmd = rxBuf; 328 cmd.tx_data = data; 329 cmd.rx_data = sc->sc_dummybuf; 330 cmd.tx_data_sz = (uint32_t)bytes_to_write; 331 cmd.rx_data_sz = (uint32_t)bytes_to_write; 332 333 /* 334 * Each completed write operation resets WEL (write enable 335 * latch) to disabled state, so we re-enable it here. 336 */ 337 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 338 break; 339 if ((err = mx25l_set_writable(sc, 1)) != 0) 340 break; 341 342 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 343 if (err != 0) 344 break; 345 err = mx25l_wait_for_device_ready(sc); 346 if (err) 347 break; 348 349 data += bytes_to_write; 350 offset += bytes_to_write; 351 count -= bytes_to_write; 352 } 353 354 return (err); 355} 356 357static int 358mx25l_read(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 359{ 360 uint8_t txBuf[8], rxBuf[8]; 361 struct spi_command cmd; 362 int err = 0; 363 364 /* 365 * Enforce that reads are aligned to the disk sectorsize, not the 366 * erase sectorsize. In this way, smaller read IO is possible, 367 * dramatically speeding up filesystem/geom_compress access. 368 */ 369 if (count % sc->sc_disk->d_sectorsize != 0 || 370 offset % sc->sc_disk->d_sectorsize != 0) 371 return (EIO); 372 373 txBuf[0] = CMD_FAST_READ; 374 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 375 cmd.tx_cmd_sz = 6; 376 cmd.rx_cmd_sz = 6; 377 378 txBuf[1] = (offset >> 24) & 0xff; 379 txBuf[2] = (offset >> 16) & 0xff; 380 txBuf[3] = (offset >> 8) & 0xff; 381 txBuf[4] = offset & 0xff; 382 /* Dummy byte */ 383 txBuf[5] = 0; 384 } else { 385 cmd.tx_cmd_sz = 5; 386 cmd.rx_cmd_sz = 5; 387 388 txBuf[1] = (offset >> 16) & 0xff; 389 txBuf[2] = (offset >> 8) & 0xff; 390 txBuf[3] = offset & 0xff; 391 /* Dummy byte */ 392 txBuf[4] = 0; 393 } 394 395 cmd.tx_cmd = txBuf; 396 cmd.rx_cmd = rxBuf; 397 cmd.tx_data = data; 398 cmd.rx_data = data; 399 cmd.tx_data_sz = count; 400 cmd.rx_data_sz = count; 401 402 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 403 return (err); 404} 405 406static int 407mx25l_set_4b_mode(struct mx25l_softc *sc, uint8_t command) 408{ 409 uint8_t txBuf[1], rxBuf[1]; 410 struct spi_command cmd; 411 int err; 412 413 memset(&cmd, 0, sizeof(cmd)); 414 memset(txBuf, 0, sizeof(txBuf)); 415 memset(rxBuf, 0, sizeof(rxBuf)); 416 417 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1; 418 419 cmd.tx_cmd = txBuf; 420 cmd.rx_cmd = rxBuf; 421 422 txBuf[0] = command; 423 424 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) == 0) 425 err = mx25l_wait_for_device_ready(sc); 426 427 return (err); 428} 429 430#ifdef FDT 431static struct ofw_compat_data compat_data[] = { 432 { "st,m25p", 1 }, 433 { "jedec,spi-nor", 1 }, 434 { NULL, 0 }, 435}; 436#endif 437 438static int 439mx25l_probe(device_t dev) 440{ 441#ifdef FDT 442 int i; 443 444 if (!ofw_bus_status_okay(dev)) 445 return (ENXIO); 446 447 /* First try to match the compatible property to the compat_data */ 448 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1) 449 goto found; 450 451 /* 452 * Next, try to find a compatible device using the names in the 453 * flash_devices structure 454 */ 455 for (i = 0; i < nitems(flash_devices); i++) 456 if (ofw_bus_is_compatible(dev, flash_devices[i].name)) 457 goto found; 458 459 return (ENXIO); 460found: 461#endif 462 device_set_desc(dev, "M25Pxx Flash Family"); 463 464 return (0); 465} 466 467static int 468mx25l_attach(device_t dev) 469{ 470 struct mx25l_softc *sc; 471 struct mx25l_flash_ident *ident; 472 int err; 473 474 sc = device_get_softc(dev); 475 sc->sc_dev = dev; 476 sc->sc_parent = device_get_parent(sc->sc_dev); 477 478 M25PXX_LOCK_INIT(sc); 479 480 ident = mx25l_get_device_ident(sc); 481 if (ident == NULL) 482 return (ENXIO); 483 484 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 485 return (err); 486 487 sc->sc_flags = ident->flags; 488 489 if (sc->sc_flags & FL_ERASE_4K) 490 sc->sc_erasesize = 4 * 1024; 491 else if (sc->sc_flags & FL_ERASE_32K) 492 sc->sc_erasesize = 32 * 1024; 493 else 494 sc->sc_erasesize = ident->sectorsize; 495 496 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 497 if ((err = mx25l_set_4b_mode(sc, CMD_ENTER_4B_MODE)) != 0) 498 return (err); 499 } else if (sc->sc_flags & FL_DISABLE_4B_ADDR) { 500 if ((err = mx25l_set_4b_mode(sc, CMD_EXIT_4B_MODE)) != 0) 501 return (err); 502 } 503 504 sc->sc_disk = disk_alloc(); 505 sc->sc_disk->d_open = mx25l_open; 506 sc->sc_disk->d_close = mx25l_close; 507 sc->sc_disk->d_strategy = mx25l_strategy; 508 sc->sc_disk->d_getattr = mx25l_getattr; 509 sc->sc_disk->d_ioctl = mx25l_ioctl; 510 sc->sc_disk->d_name = "flash/spi"; 511 sc->sc_disk->d_drv1 = sc; 512 sc->sc_disk->d_maxsize = DFLTPHYS; 513 sc->sc_disk->d_sectorsize = MX25L_SECTORSIZE; 514 sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount; 515 sc->sc_disk->d_stripesize = sc->sc_erasesize; 516 sc->sc_disk->d_unit = device_get_unit(sc->sc_dev); 517 sc->sc_disk->d_dump = NULL; /* NB: no dumps */ 518 strlcpy(sc->sc_disk->d_descr, ident->name, 519 sizeof(sc->sc_disk->d_descr)); 520 521 disk_create(sc->sc_disk, DISK_VERSION); 522 bioq_init(&sc->sc_bio_queue); 523 524 kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash"); 525 sc->sc_taskstate = TSTATE_RUNNING; 526 527 device_printf(sc->sc_dev, 528 "device type %s, size %dK in %d sectors of %dK, erase size %dK\n", 529 ident->name, 530 ident->sectorcount * ident->sectorsize / 1024, 531 ident->sectorcount, ident->sectorsize / 1024, 532 sc->sc_erasesize / 1024); 533 534 return (0); 535} 536 537static int 538mx25l_detach(device_t dev) 539{ 540 struct mx25l_softc *sc; 541 int err; 542 543 sc = device_get_softc(dev); 544 err = 0; 545 546 M25PXX_LOCK(sc); 547 if (sc->sc_taskstate == TSTATE_RUNNING) { 548 sc->sc_taskstate = TSTATE_STOPPING; 549 wakeup(sc); 550 while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) { 551 err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3); 552 if (err != 0) { 553 sc->sc_taskstate = TSTATE_RUNNING; 554 device_printf(sc->sc_dev, 555 "Failed to stop queue task\n"); 556 } 557 } 558 } 559 M25PXX_UNLOCK(sc); 560 561 if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) { 562 disk_destroy(sc->sc_disk); 563 bioq_flush(&sc->sc_bio_queue, NULL, ENXIO); 564 M25PXX_LOCK_DESTROY(sc); 565 } 566 return (err); 567} 568 569static int 570mx25l_open(struct disk *dp) 571{ 572 return (0); 573} 574 575static int 576mx25l_close(struct disk *dp) 577{ 578 579 return (0); 580} 581 582static int 583mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag, 584 struct thread *td) 585{ 586 587 return (EINVAL); 588} 589 590static void 591mx25l_strategy(struct bio *bp) 592{ 593 struct mx25l_softc *sc; 594 595 sc = (struct mx25l_softc *)bp->bio_disk->d_drv1; 596 M25PXX_LOCK(sc); 597 bioq_disksort(&sc->sc_bio_queue, bp); 598 wakeup(sc); 599 M25PXX_UNLOCK(sc); 600} 601 602static int 603mx25l_getattr(struct bio *bp) 604{ 605 struct mx25l_softc *sc; 606 device_t dev; 607 608 if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL) 609 return (ENXIO); 610 611 sc = bp->bio_disk->d_drv1; 612 dev = sc->sc_dev; 613 614 if (strcmp(bp->bio_attribute, "SPI::device") == 0) { 615 if (bp->bio_length != sizeof(dev)) 616 return (EFAULT); 617 bcopy(&dev, bp->bio_data, sizeof(dev)); 618 } else 619 return (-1); 620 return (0); 621} 622 623static void 624mx25l_task(void *arg) 625{ 626 struct mx25l_softc *sc = (struct mx25l_softc*)arg; 627 struct bio *bp; 628 device_t dev; 629 630 for (;;) { 631 dev = sc->sc_dev; 632 M25PXX_LOCK(sc); 633 do { 634 if (sc->sc_taskstate == TSTATE_STOPPING) { 635 sc->sc_taskstate = TSTATE_STOPPED; 636 M25PXX_UNLOCK(sc); 637 wakeup(sc); 638 kproc_exit(0); 639 } 640 bp = bioq_first(&sc->sc_bio_queue); 641 if (bp == NULL) 642 msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0); 643 } while (bp == NULL); 644 bioq_remove(&sc->sc_bio_queue, bp); 645 M25PXX_UNLOCK(sc); 646 647 switch (bp->bio_cmd) { 648 case BIO_READ: 649 bp->bio_error = mx25l_read(sc, bp->bio_offset, 650 bp->bio_data, bp->bio_bcount); 651 break; 652 case BIO_WRITE: 653 bp->bio_error = mx25l_write(sc, bp->bio_offset, 654 bp->bio_data, bp->bio_bcount); 655 break; 656 default: 657 bp->bio_error = EINVAL; 658 } 659 660 661 biodone(bp); 662 } 663} 664 665static devclass_t mx25l_devclass; 666 667static device_method_t mx25l_methods[] = { 668 /* Device interface */ 669 DEVMETHOD(device_probe, mx25l_probe), 670 DEVMETHOD(device_attach, mx25l_attach), 671 DEVMETHOD(device_detach, mx25l_detach), 672 673 { 0, 0 } 674}; 675 676static driver_t mx25l_driver = { 677 "mx25l", 678 mx25l_methods, 679 sizeof(struct mx25l_softc), 680}; 681 682DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0); 683MODULE_DEPEND(mx25l, spibus, 1, 1, 1); 684MODULE_DEPEND(mx25l, fdt_slicer, 1, 1, 1); 685