mx25l.c revision 331506
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: stable/11/sys/dev/flash/mx25l.c 331506 2018-03-24 23:23:31Z ian $"); 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 71struct 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 81struct 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}; 94 95#define TSTATE_STOPPED 0 96#define TSTATE_STOPPING 1 97#define TSTATE_RUNNING 2 98 99#define M25PXX_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 100#define M25PXX_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 101#define M25PXX_LOCK_INIT(_sc) \ 102 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \ 103 "mx25l", MTX_DEF) 104#define M25PXX_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 105#define M25PXX_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 106#define M25PXX_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 107 108/* disk routines */ 109static int mx25l_open(struct disk *dp); 110static int mx25l_close(struct disk *dp); 111static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *); 112static void mx25l_strategy(struct bio *bp); 113static int mx25l_getattr(struct bio *bp); 114static void mx25l_task(void *arg); 115 116struct mx25l_flash_ident flash_devices[] = { 117 { "en25f32", 0x1c, 0x3116, 64 * 1024, 64, FL_NONE }, 118 { "en25p32", 0x1c, 0x2016, 64 * 1024, 64, FL_NONE }, 119 { "en25p64", 0x1c, 0x2017, 64 * 1024, 128, FL_NONE }, 120 { "en25q32", 0x1c, 0x3016, 64 * 1024, 64, FL_NONE }, 121 { "en25q64", 0x1c, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 122 { "m25p32", 0x20, 0x2016, 64 * 1024, 64, FL_NONE }, 123 { "m25p64", 0x20, 0x2017, 64 * 1024, 128, FL_NONE }, 124 { "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64, FL_NONE }, 125 { "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128, FL_NONE }, 126 { "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256, FL_ERASE_4K | FL_ERASE_32K }, 127 { "mx25ll256", 0xc2, 0x2019, 64 * 1024, 512, FL_ERASE_4K | FL_ERASE_32K | FL_ENABLE_4B_ADDR }, 128 { "s25fl032", 0x01, 0x0215, 64 * 1024, 64, FL_NONE }, 129 { "s25fl064", 0x01, 0x0216, 64 * 1024, 128, FL_NONE }, 130 { "s25fl128", 0x01, 0x2018, 64 * 1024, 256, FL_NONE }, 131 { "s25fl256s", 0x01, 0x0219, 64 * 1024, 512, FL_NONE }, 132 { "SST25VF010A", 0xbf, 0x2549, 4 * 1024, 32, FL_ERASE_4K | FL_ERASE_32K }, 133 { "SST25VF032B", 0xbf, 0x254a, 64 * 1024, 64, FL_ERASE_4K | FL_ERASE_32K }, 134 135 /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */ 136 { "w25x32", 0xef, 0x3016, 64 * 1024, 64, FL_ERASE_4K }, 137 { "w25x64", 0xef, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 138 { "w25q32", 0xef, 0x4016, 64 * 1024, 64, FL_ERASE_4K }, 139 { "w25q64", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 140 { "w25q64bv", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 141 { "w25q128", 0xef, 0x4018, 64 * 1024, 256, FL_ERASE_4K }, 142 { "w25q256", 0xef, 0x4019, 64 * 1024, 512, FL_ERASE_4K }, 143 144 /* Atmel */ 145 { "at25df641", 0x1f, 0x4800, 64 * 1024, 128, FL_ERASE_4K }, 146 147 /* GigaDevice */ 148 { "gd25q64", 0xc8, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 149}; 150 151static uint8_t 152mx25l_get_status(device_t dev) 153{ 154 uint8_t txBuf[2], rxBuf[2]; 155 struct spi_command cmd; 156 int err; 157 158 memset(&cmd, 0, sizeof(cmd)); 159 memset(txBuf, 0, sizeof(txBuf)); 160 memset(rxBuf, 0, sizeof(rxBuf)); 161 162 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(device_get_parent(dev), dev, &cmd); 168 return (rxBuf[1]); 169} 170 171static void 172mx25l_wait_for_device_ready(device_t dev) 173{ 174 while ((mx25l_get_status(dev) & STATUS_WIP)) 175 continue; 176} 177 178static struct mx25l_flash_ident* 179mx25l_get_device_ident(struct mx25l_softc *sc) 180{ 181 device_t dev = sc->sc_dev; 182 uint8_t txBuf[8], rxBuf[8]; 183 struct spi_command cmd; 184 uint8_t manufacturer_id; 185 uint16_t dev_id; 186 int err, i; 187 188 memset(&cmd, 0, sizeof(cmd)); 189 memset(txBuf, 0, sizeof(txBuf)); 190 memset(rxBuf, 0, sizeof(rxBuf)); 191 192 txBuf[0] = CMD_READ_IDENT; 193 cmd.tx_cmd = &txBuf; 194 cmd.rx_cmd = &rxBuf; 195 /* 196 * Some compatible devices has extended two-bytes ID 197 * We'll use only manufacturer/deviceid atm 198 */ 199 cmd.tx_cmd_sz = 4; 200 cmd.rx_cmd_sz = 4; 201 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd); 202 if (err) 203 return (NULL); 204 205 manufacturer_id = rxBuf[1]; 206 dev_id = (rxBuf[2] << 8) | (rxBuf[3]); 207 208 for (i = 0; 209 i < nitems(flash_devices); i++) { 210 if ((flash_devices[i].manufacturer_id == manufacturer_id) && 211 (flash_devices[i].device_id == dev_id)) 212 return &flash_devices[i]; 213 } 214 215 printf("Unknown SPI flash device. Vendor: %02x, device id: %04x\n", 216 manufacturer_id, dev_id); 217 return (NULL); 218} 219 220static void 221mx25l_set_writable(device_t dev, int writable) 222{ 223 uint8_t txBuf[1], rxBuf[1]; 224 struct spi_command cmd; 225 int err; 226 227 memset(&cmd, 0, sizeof(cmd)); 228 memset(txBuf, 0, sizeof(txBuf)); 229 memset(rxBuf, 0, sizeof(rxBuf)); 230 231 txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE; 232 cmd.tx_cmd = txBuf; 233 cmd.rx_cmd = rxBuf; 234 cmd.rx_cmd_sz = 1; 235 cmd.tx_cmd_sz = 1; 236 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd); 237} 238 239static void 240mx25l_erase_cmd(device_t dev, off_t sector, uint8_t ecmd) 241{ 242 struct mx25l_softc *sc; 243 uint8_t txBuf[5], rxBuf[5]; 244 struct spi_command cmd; 245 int err; 246 247 sc = device_get_softc(dev); 248 249 mx25l_wait_for_device_ready(dev); 250 mx25l_set_writable(dev, 1); 251 252 memset(&cmd, 0, sizeof(cmd)); 253 memset(txBuf, 0, sizeof(txBuf)); 254 memset(rxBuf, 0, sizeof(rxBuf)); 255 256 txBuf[0] = ecmd; 257 cmd.tx_cmd = txBuf; 258 cmd.rx_cmd = rxBuf; 259 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 260 cmd.rx_cmd_sz = 5; 261 cmd.tx_cmd_sz = 5; 262 txBuf[1] = ((sector >> 24) & 0xff); 263 txBuf[2] = ((sector >> 16) & 0xff); 264 txBuf[3] = ((sector >> 8) & 0xff); 265 txBuf[4] = (sector & 0xff); 266 } else { 267 cmd.rx_cmd_sz = 4; 268 cmd.tx_cmd_sz = 4; 269 txBuf[1] = ((sector >> 16) & 0xff); 270 txBuf[2] = ((sector >> 8) & 0xff); 271 txBuf[3] = (sector & 0xff); 272 } 273 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd); 274} 275 276static int 277mx25l_write(device_t dev, off_t offset, caddr_t data, off_t count) 278{ 279 struct mx25l_softc *sc; 280 uint8_t txBuf[8], rxBuf[8]; 281 struct spi_command cmd; 282 off_t write_offset; 283 long bytes_to_write, bytes_writen; 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 bytes_writen = 0; 299 write_offset = offset; 300 301 /* 302 * Use the erase sectorsize here since blocks are fully erased 303 * first before they're written to. 304 */ 305 if (count % sc->sc_sectorsize != 0 || offset % sc->sc_sectorsize != 0) 306 return (EIO); 307 308 /* 309 * Assume here that we write per-sector only 310 * and sector size should be 256 bytes aligned 311 */ 312 KASSERT(write_offset % FLASH_PAGE_SIZE == 0, 313 ("offset for BIO_WRITE is not page size (%d bytes) aligned", 314 FLASH_PAGE_SIZE)); 315 316 /* 317 * Maximum write size for CMD_PAGE_PROGRAM is 318 * FLASH_PAGE_SIZE, so split data to chunks 319 * FLASH_PAGE_SIZE bytes eash and write them 320 * one by one 321 */ 322 while (bytes_writen < count) { 323 /* 324 * If we crossed sector boundary - erase next sector 325 */ 326 if (((offset + bytes_writen) % sc->sc_sectorsize) == 0) 327 mx25l_erase_cmd(dev, offset + bytes_writen, CMD_SECTOR_ERASE); 328 329 txBuf[0] = CMD_PAGE_PROGRAM; 330 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 331 txBuf[1] = ((write_offset >> 24) & 0xff); 332 txBuf[2] = ((write_offset >> 16) & 0xff); 333 txBuf[3] = ((write_offset >> 8) & 0xff); 334 txBuf[4] = (write_offset & 0xff); 335 } else { 336 txBuf[1] = ((write_offset >> 16) & 0xff); 337 txBuf[2] = ((write_offset >> 8) & 0xff); 338 txBuf[3] = (write_offset & 0xff); 339 } 340 341 bytes_to_write = MIN(FLASH_PAGE_SIZE, 342 count - bytes_writen); 343 cmd.tx_cmd = txBuf; 344 cmd.rx_cmd = rxBuf; 345 cmd.tx_data = data + bytes_writen; 346 cmd.tx_data_sz = bytes_to_write; 347 cmd.rx_data = data + bytes_writen; 348 cmd.rx_data_sz = bytes_to_write; 349 350 /* 351 * Eash completed write operation resets WEL 352 * (write enable latch) to disabled state, 353 * so we re-enable it here 354 */ 355 mx25l_wait_for_device_ready(dev); 356 mx25l_set_writable(dev, 1); 357 358 err = SPIBUS_TRANSFER(pdev, dev, &cmd); 359 if (err) 360 break; 361 362 bytes_writen += bytes_to_write; 363 write_offset += bytes_to_write; 364 } 365 366 return (err); 367} 368 369static int 370mx25l_read(device_t dev, off_t offset, caddr_t data, off_t count) 371{ 372 struct mx25l_softc *sc; 373 uint8_t txBuf[8], rxBuf[8]; 374 struct spi_command cmd; 375 device_t pdev; 376 int err = 0; 377 378 pdev = device_get_parent(dev); 379 sc = device_get_softc(dev); 380 381 /* 382 * Enforce the disk read sectorsize not the erase sectorsize. 383 * In this way, smaller read IO is possible,dramatically 384 * speeding up filesystem/geom_compress access. 385 */ 386 if (count % sc->sc_disk->d_sectorsize != 0 387 || offset % sc->sc_disk->d_sectorsize != 0) 388 return (EIO); 389 390 txBuf[0] = CMD_FAST_READ; 391 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 392 cmd.tx_cmd_sz = 6; 393 cmd.rx_cmd_sz = 6; 394 395 txBuf[1] = ((offset >> 24) & 0xff); 396 txBuf[2] = ((offset >> 16) & 0xff); 397 txBuf[3] = ((offset >> 8) & 0xff); 398 txBuf[4] = (offset & 0xff); 399 /* Dummy byte */ 400 txBuf[5] = 0; 401 } else { 402 cmd.tx_cmd_sz = 5; 403 cmd.rx_cmd_sz = 5; 404 405 txBuf[1] = ((offset >> 16) & 0xff); 406 txBuf[2] = ((offset >> 8) & 0xff); 407 txBuf[3] = (offset & 0xff); 408 /* Dummy byte */ 409 txBuf[4] = 0; 410 } 411 412 cmd.tx_cmd = txBuf; 413 cmd.rx_cmd = rxBuf; 414 cmd.tx_data = data; 415 cmd.tx_data_sz = count; 416 cmd.rx_data = data; 417 cmd.rx_data_sz = count; 418 419 err = SPIBUS_TRANSFER(pdev, dev, &cmd); 420 421 return (err); 422} 423 424static int 425mx25l_set_4b_mode(device_t dev, uint8_t command) 426{ 427 uint8_t txBuf[1], rxBuf[1]; 428 struct spi_command cmd; 429 device_t pdev; 430 int err; 431 432 memset(&cmd, 0, sizeof(cmd)); 433 memset(txBuf, 0, sizeof(txBuf)); 434 memset(rxBuf, 0, sizeof(rxBuf)); 435 436 pdev = device_get_parent(dev); 437 438 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1; 439 440 cmd.tx_cmd = txBuf; 441 cmd.rx_cmd = rxBuf; 442 443 txBuf[0] = command; 444 445 err = SPIBUS_TRANSFER(pdev, dev, &cmd); 446 447 mx25l_wait_for_device_ready(dev); 448 449 return (err); 450} 451 452#ifdef FDT 453static struct ofw_compat_data compat_data[] = { 454 { "st,m25p", 1 }, 455 { "jedec,spi-nor", 1 }, 456 { NULL, 0 }, 457}; 458#endif 459 460static int 461mx25l_probe(device_t dev) 462{ 463#ifdef FDT 464 int i; 465 466 if (!ofw_bus_status_okay(dev)) 467 return (ENXIO); 468 469 /* First try to match the compatible property to the compat_data */ 470 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1) 471 goto found; 472 473 /* 474 * Next, try to find a compatible device using the names in the 475 * flash_devices structure 476 */ 477 for (i = 0; i < nitems(flash_devices); i++) 478 if (ofw_bus_is_compatible(dev, flash_devices[i].name)) 479 goto found; 480 481 return (ENXIO); 482found: 483#endif 484 device_set_desc(dev, "M25Pxx Flash Family"); 485 486 return (0); 487} 488 489static int 490mx25l_attach(device_t dev) 491{ 492 struct mx25l_softc *sc; 493 struct mx25l_flash_ident *ident; 494 495 sc = device_get_softc(dev); 496 sc->sc_dev = dev; 497 M25PXX_LOCK_INIT(sc); 498 499 ident = mx25l_get_device_ident(sc); 500 if (ident == NULL) 501 return (ENXIO); 502 503 mx25l_wait_for_device_ready(sc->sc_dev); 504 505 sc->sc_disk = disk_alloc(); 506 sc->sc_disk->d_open = mx25l_open; 507 sc->sc_disk->d_close = mx25l_close; 508 sc->sc_disk->d_strategy = mx25l_strategy; 509 sc->sc_disk->d_getattr = mx25l_getattr; 510 sc->sc_disk->d_ioctl = mx25l_ioctl; 511 sc->sc_disk->d_name = "flash/spi"; 512 sc->sc_disk->d_drv1 = sc; 513 sc->sc_disk->d_maxsize = DFLTPHYS; 514 sc->sc_disk->d_sectorsize = MX25L_SECTORSIZE; 515 sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount; 516 sc->sc_disk->d_unit = device_get_unit(sc->sc_dev); 517 sc->sc_disk->d_dump = NULL; /* NB: no dumps */ 518 /* Sectorsize for erase operations */ 519 sc->sc_sectorsize = ident->sectorsize; 520 sc->sc_flags = ident->flags; 521 522 if (sc->sc_flags & FL_ENABLE_4B_ADDR) 523 mx25l_set_4b_mode(dev, CMD_ENTER_4B_MODE); 524 525 if (sc->sc_flags & FL_DISABLE_4B_ADDR) 526 mx25l_set_4b_mode(dev, CMD_EXIT_4B_MODE); 527 528 /* NB: use stripesize to hold the erase/region size for RedBoot */ 529 sc->sc_disk->d_stripesize = ident->sectorsize; 530 531 disk_create(sc->sc_disk, DISK_VERSION); 532 bioq_init(&sc->sc_bio_queue); 533 534 kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash"); 535 sc->sc_taskstate = TSTATE_RUNNING; 536 537 device_printf(sc->sc_dev, "%s, sector %d bytes, %d sectors\n", 538 ident->name, ident->sectorsize, ident->sectorcount); 539 540 return (0); 541} 542 543static int 544mx25l_detach(device_t dev) 545{ 546 struct mx25l_softc *sc; 547 int err; 548 549 sc = device_get_softc(dev); 550 err = 0; 551 552 M25PXX_LOCK(sc); 553 if (sc->sc_taskstate == TSTATE_RUNNING) { 554 sc->sc_taskstate = TSTATE_STOPPING; 555 wakeup(sc); 556 while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) { 557 err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3); 558 if (err != 0) { 559 sc->sc_taskstate = TSTATE_RUNNING; 560 device_printf(dev, 561 "Failed to stop queue task\n"); 562 } 563 } 564 } 565 M25PXX_UNLOCK(sc); 566 567 if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) { 568 disk_destroy(sc->sc_disk); 569 bioq_flush(&sc->sc_bio_queue, NULL, ENXIO); 570 M25PXX_LOCK_DESTROY(sc); 571 } 572 return (err); 573} 574 575static int 576mx25l_open(struct disk *dp) 577{ 578 return (0); 579} 580 581static int 582mx25l_close(struct disk *dp) 583{ 584 585 return (0); 586} 587 588static int 589mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag, 590 struct thread *td) 591{ 592 593 return (EINVAL); 594} 595 596static void 597mx25l_strategy(struct bio *bp) 598{ 599 struct mx25l_softc *sc; 600 601 sc = (struct mx25l_softc *)bp->bio_disk->d_drv1; 602 M25PXX_LOCK(sc); 603 bioq_disksort(&sc->sc_bio_queue, bp); 604 wakeup(sc); 605 M25PXX_UNLOCK(sc); 606} 607 608static int 609mx25l_getattr(struct bio *bp) 610{ 611 struct mx25l_softc *sc; 612 device_t dev; 613 614 if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL) 615 return (ENXIO); 616 617 sc = bp->bio_disk->d_drv1; 618 dev = sc->sc_dev; 619 620 if (strcmp(bp->bio_attribute, "SPI::device") == 0) { 621 if (bp->bio_length != sizeof(dev)) 622 return (EFAULT); 623 bcopy(&dev, bp->bio_data, sizeof(dev)); 624 } else 625 return (-1); 626 return (0); 627} 628 629static void 630mx25l_task(void *arg) 631{ 632 struct mx25l_softc *sc = (struct mx25l_softc*)arg; 633 struct bio *bp; 634 device_t dev; 635 636 for (;;) { 637 dev = sc->sc_dev; 638 M25PXX_LOCK(sc); 639 do { 640 if (sc->sc_taskstate == TSTATE_STOPPING) { 641 sc->sc_taskstate = TSTATE_STOPPED; 642 M25PXX_UNLOCK(sc); 643 wakeup(sc); 644 kproc_exit(0); 645 } 646 bp = bioq_first(&sc->sc_bio_queue); 647 if (bp == NULL) 648 msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0); 649 } while (bp == NULL); 650 bioq_remove(&sc->sc_bio_queue, bp); 651 M25PXX_UNLOCK(sc); 652 653 switch (bp->bio_cmd) { 654 case BIO_READ: 655 bp->bio_error = mx25l_read(dev, bp->bio_offset, 656 bp->bio_data, bp->bio_bcount); 657 break; 658 case BIO_WRITE: 659 bp->bio_error = mx25l_write(dev, bp->bio_offset, 660 bp->bio_data, bp->bio_bcount); 661 break; 662 default: 663 bp->bio_error = EINVAL; 664 } 665 666 667 biodone(bp); 668 } 669} 670 671static devclass_t mx25l_devclass; 672 673static device_method_t mx25l_methods[] = { 674 /* Device interface */ 675 DEVMETHOD(device_probe, mx25l_probe), 676 DEVMETHOD(device_attach, mx25l_attach), 677 DEVMETHOD(device_detach, mx25l_detach), 678 679 { 0, 0 } 680}; 681 682static driver_t mx25l_driver = { 683 "mx25l", 684 mx25l_methods, 685 sizeof(struct mx25l_softc), 686}; 687 688DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0); 689MODULE_DEPEND(mx25l, spibus, 1, 1, 1); 690