Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/flash/mx25l.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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: releng/12.0/sys/dev/flash/mx25l.c 336869 2018-07-29 16:55:28Z ian $"); 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 static 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 { "mx25l1606e", 0xc2, 0x2015, 64 * 1024, 32, FL_ERASE_4K}, 128 { "mx25ll32", 0xc2, 0x2016, 64 * 1024, 64, FL_NONE }, 129 { "mx25ll64", 0xc2, 0x2017, 64 * 1024, 128, FL_NONE }, 130 { "mx25ll128", 0xc2, 0x2018, 64 * 1024, 256, FL_ERASE_4K | FL_ERASE_32K }, 131 { "mx25ll256", 0xc2, 0x2019, 64 * 1024, 512, FL_ERASE_4K | FL_ERASE_32K | FL_ENABLE_4B_ADDR }, 132 { "s25fl032", 0x01, 0x0215, 64 * 1024, 64, FL_NONE }, 133 { "s25fl064", 0x01, 0x0216, 64 * 1024, 128, FL_NONE }, 134 { "s25fl128", 0x01, 0x2018, 64 * 1024, 256, FL_NONE }, 135 { "s25fl256s", 0x01, 0x0219, 64 * 1024, 512, FL_NONE }, 136 { "SST25VF010A", 0xbf, 0x2549, 4 * 1024, 32, FL_ERASE_4K | FL_ERASE_32K }, 137 { "SST25VF032B", 0xbf, 0x254a, 64 * 1024, 64, FL_ERASE_4K | FL_ERASE_32K }, 138 139 /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */ 140 { "w25x32", 0xef, 0x3016, 64 * 1024, 64, FL_ERASE_4K }, 141 { "w25x64", 0xef, 0x3017, 64 * 1024, 128, FL_ERASE_4K }, 142 { "w25q32", 0xef, 0x4016, 64 * 1024, 64, FL_ERASE_4K }, 143 { "w25q64", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 144 { "w25q64bv", 0xef, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 145 { "w25q128", 0xef, 0x4018, 64 * 1024, 256, FL_ERASE_4K }, 146 { "w25q256", 0xef, 0x4019, 64 * 1024, 512, FL_ERASE_4K }, 147 148 /* Atmel */ 149 { "at25df641", 0x1f, 0x4800, 64 * 1024, 128, FL_ERASE_4K }, 150 151 /* GigaDevice */ 152 { "gd25q64", 0xc8, 0x4017, 64 * 1024, 128, FL_ERASE_4K }, 153 }; 154 155 static int 156 mx25l_wait_for_device_ready(struct mx25l_softc *sc) 157 { 158 uint8_t txBuf[2], rxBuf[2]; 159 struct spi_command cmd; 160 int err; 161 162 memset(&cmd, 0, sizeof(cmd)); 163 164 do { 165 txBuf[0] = CMD_READ_STATUS; 166 cmd.tx_cmd = txBuf; 167 cmd.rx_cmd = rxBuf; 168 cmd.rx_cmd_sz = 2; 169 cmd.tx_cmd_sz = 2; 170 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 171 } while (err == 0 && (rxBuf[1] & STATUS_WIP)); 172 173 return (err); 174 } 175 176 static struct mx25l_flash_ident* 177 mx25l_get_device_ident(struct mx25l_softc *sc) 178 { 179 uint8_t txBuf[8], rxBuf[8]; 180 struct spi_command cmd; 181 uint8_t manufacturer_id; 182 uint16_t dev_id; 183 int err, i; 184 185 memset(&cmd, 0, sizeof(cmd)); 186 memset(txBuf, 0, sizeof(txBuf)); 187 memset(rxBuf, 0, sizeof(rxBuf)); 188 189 txBuf[0] = CMD_READ_IDENT; 190 cmd.tx_cmd = &txBuf; 191 cmd.rx_cmd = &rxBuf; 192 /* 193 * Some compatible devices has extended two-bytes ID 194 * We'll use only manufacturer/deviceid atm 195 */ 196 cmd.tx_cmd_sz = 4; 197 cmd.rx_cmd_sz = 4; 198 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 199 if (err) 200 return (NULL); 201 202 manufacturer_id = rxBuf[1]; 203 dev_id = (rxBuf[2] << 8) | (rxBuf[3]); 204 205 for (i = 0; i < nitems(flash_devices); i++) { 206 if ((flash_devices[i].manufacturer_id == manufacturer_id) && 207 (flash_devices[i].device_id == dev_id)) 208 return &flash_devices[i]; 209 } 210 211 device_printf(sc->sc_dev, 212 "Unknown SPI flash device. Vendor: %02x, device id: %04x\n", 213 manufacturer_id, dev_id); 214 return (NULL); 215 } 216 217 static int 218 mx25l_set_writable(struct mx25l_softc *sc, int writable) 219 { 220 uint8_t txBuf[1], rxBuf[1]; 221 struct spi_command cmd; 222 int err; 223 224 memset(&cmd, 0, sizeof(cmd)); 225 memset(txBuf, 0, sizeof(txBuf)); 226 memset(rxBuf, 0, sizeof(rxBuf)); 227 228 txBuf[0] = writable ? CMD_WRITE_ENABLE : CMD_WRITE_DISABLE; 229 cmd.tx_cmd = txBuf; 230 cmd.rx_cmd = rxBuf; 231 cmd.rx_cmd_sz = 1; 232 cmd.tx_cmd_sz = 1; 233 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 234 return (err); 235 } 236 237 static int 238 mx25l_erase_cmd(struct mx25l_softc *sc, off_t sector) 239 { 240 uint8_t txBuf[5], rxBuf[5]; 241 struct spi_command cmd; 242 int err; 243 244 if ((err = mx25l_set_writable(sc, 1)) != 0) 245 return (err); 246 247 memset(&cmd, 0, sizeof(cmd)); 248 memset(txBuf, 0, sizeof(txBuf)); 249 memset(rxBuf, 0, sizeof(rxBuf)); 250 251 cmd.tx_cmd = txBuf; 252 cmd.rx_cmd = rxBuf; 253 254 if (sc->sc_flags & FL_ERASE_4K) 255 txBuf[0] = CMD_BLOCK_4K_ERASE; 256 else if (sc->sc_flags & FL_ERASE_32K) 257 txBuf[0] = CMD_BLOCK_32K_ERASE; 258 else 259 txBuf[0] = CMD_SECTOR_ERASE; 260 261 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 262 cmd.rx_cmd_sz = 5; 263 cmd.tx_cmd_sz = 5; 264 txBuf[1] = ((sector >> 24) & 0xff); 265 txBuf[2] = ((sector >> 16) & 0xff); 266 txBuf[3] = ((sector >> 8) & 0xff); 267 txBuf[4] = (sector & 0xff); 268 } else { 269 cmd.rx_cmd_sz = 4; 270 cmd.tx_cmd_sz = 4; 271 txBuf[1] = ((sector >> 16) & 0xff); 272 txBuf[2] = ((sector >> 8) & 0xff); 273 txBuf[3] = (sector & 0xff); 274 } 275 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) != 0) 276 return (err); 277 err = mx25l_wait_for_device_ready(sc); 278 return (err); 279 } 280 281 static int 282 mx25l_write(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 283 { 284 uint8_t txBuf[8], rxBuf[8]; 285 struct spi_command cmd; 286 off_t bytes_to_write; 287 int err = 0; 288 289 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 290 cmd.tx_cmd_sz = 5; 291 cmd.rx_cmd_sz = 5; 292 } else { 293 cmd.tx_cmd_sz = 4; 294 cmd.rx_cmd_sz = 4; 295 } 296 297 /* 298 * Writes must be aligned to the erase sectorsize, since blocks are 299 * fully erased before they're written to. 300 */ 301 if (count % sc->sc_erasesize != 0 || offset % sc->sc_erasesize != 0) 302 return (EIO); 303 304 /* 305 * Maximum write size for CMD_PAGE_PROGRAM is FLASH_PAGE_SIZE, so loop 306 * to write chunks of FLASH_PAGE_SIZE bytes each. 307 */ 308 while (count != 0) { 309 /* If we crossed a sector boundary, erase the next sector. */ 310 if (((offset) % sc->sc_erasesize) == 0) { 311 err = mx25l_erase_cmd(sc, offset); 312 if (err) 313 break; 314 } 315 316 txBuf[0] = CMD_PAGE_PROGRAM; 317 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 318 txBuf[1] = (offset >> 24) & 0xff; 319 txBuf[2] = (offset >> 16) & 0xff; 320 txBuf[3] = (offset >> 8) & 0xff; 321 txBuf[4] = offset & 0xff; 322 } else { 323 txBuf[1] = (offset >> 16) & 0xff; 324 txBuf[2] = (offset >> 8) & 0xff; 325 txBuf[3] = offset & 0xff; 326 } 327 328 bytes_to_write = MIN(FLASH_PAGE_SIZE, count); 329 cmd.tx_cmd = txBuf; 330 cmd.rx_cmd = rxBuf; 331 cmd.tx_data = data; 332 cmd.rx_data = sc->sc_dummybuf; 333 cmd.tx_data_sz = (uint32_t)bytes_to_write; 334 cmd.rx_data_sz = (uint32_t)bytes_to_write; 335 336 /* 337 * Each completed write operation resets WEL (write enable 338 * latch) to disabled state, so we re-enable it here. 339 */ 340 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 341 break; 342 if ((err = mx25l_set_writable(sc, 1)) != 0) 343 break; 344 345 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 346 if (err != 0) 347 break; 348 err = mx25l_wait_for_device_ready(sc); 349 if (err) 350 break; 351 352 data += bytes_to_write; 353 offset += bytes_to_write; 354 count -= bytes_to_write; 355 } 356 357 return (err); 358 } 359 360 static int 361 mx25l_read(struct mx25l_softc *sc, off_t offset, caddr_t data, off_t count) 362 { 363 uint8_t txBuf[8], rxBuf[8]; 364 struct spi_command cmd; 365 int err = 0; 366 367 /* 368 * Enforce that reads are aligned to the disk sectorsize, not the 369 * erase sectorsize. In this way, smaller read IO is possible, 370 * dramatically speeding up filesystem/geom_compress access. 371 */ 372 if (count % sc->sc_disk->d_sectorsize != 0 || 373 offset % sc->sc_disk->d_sectorsize != 0) 374 return (EIO); 375 376 txBuf[0] = CMD_FAST_READ; 377 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 378 cmd.tx_cmd_sz = 6; 379 cmd.rx_cmd_sz = 6; 380 381 txBuf[1] = (offset >> 24) & 0xff; 382 txBuf[2] = (offset >> 16) & 0xff; 383 txBuf[3] = (offset >> 8) & 0xff; 384 txBuf[4] = offset & 0xff; 385 /* Dummy byte */ 386 txBuf[5] = 0; 387 } else { 388 cmd.tx_cmd_sz = 5; 389 cmd.rx_cmd_sz = 5; 390 391 txBuf[1] = (offset >> 16) & 0xff; 392 txBuf[2] = (offset >> 8) & 0xff; 393 txBuf[3] = offset & 0xff; 394 /* Dummy byte */ 395 txBuf[4] = 0; 396 } 397 398 cmd.tx_cmd = txBuf; 399 cmd.rx_cmd = rxBuf; 400 cmd.tx_data = data; 401 cmd.rx_data = data; 402 cmd.tx_data_sz = count; 403 cmd.rx_data_sz = count; 404 405 err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd); 406 return (err); 407 } 408 409 static int 410 mx25l_set_4b_mode(struct mx25l_softc *sc, uint8_t command) 411 { 412 uint8_t txBuf[1], rxBuf[1]; 413 struct spi_command cmd; 414 int err; 415 416 memset(&cmd, 0, sizeof(cmd)); 417 memset(txBuf, 0, sizeof(txBuf)); 418 memset(rxBuf, 0, sizeof(rxBuf)); 419 420 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 1; 421 422 cmd.tx_cmd = txBuf; 423 cmd.rx_cmd = rxBuf; 424 425 txBuf[0] = command; 426 427 if ((err = SPIBUS_TRANSFER(sc->sc_parent, sc->sc_dev, &cmd)) == 0) 428 err = mx25l_wait_for_device_ready(sc); 429 430 return (err); 431 } 432 433 #ifdef FDT 434 static struct ofw_compat_data compat_data[] = { 435 { "st,m25p", 1 }, 436 { "jedec,spi-nor", 1 }, 437 { NULL, 0 }, 438 }; 439 #endif 440 441 static int 442 mx25l_probe(device_t dev) 443 { 444 #ifdef FDT 445 int i; 446 447 if (!ofw_bus_status_okay(dev)) 448 return (ENXIO); 449 450 /* First try to match the compatible property to the compat_data */ 451 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 1) 452 goto found; 453 454 /* 455 * Next, try to find a compatible device using the names in the 456 * flash_devices structure 457 */ 458 for (i = 0; i < nitems(flash_devices); i++) 459 if (ofw_bus_is_compatible(dev, flash_devices[i].name)) 460 goto found; 461 462 return (ENXIO); 463 found: 464 #endif 465 device_set_desc(dev, "M25Pxx Flash Family"); 466 467 return (0); 468 } 469 470 static int 471 mx25l_attach(device_t dev) 472 { 473 struct mx25l_softc *sc; 474 struct mx25l_flash_ident *ident; 475 int err; 476 477 sc = device_get_softc(dev); 478 sc->sc_dev = dev; 479 sc->sc_parent = device_get_parent(sc->sc_dev); 480 481 M25PXX_LOCK_INIT(sc); 482 483 ident = mx25l_get_device_ident(sc); 484 if (ident == NULL) 485 return (ENXIO); 486 487 if ((err = mx25l_wait_for_device_ready(sc)) != 0) 488 return (err); 489 490 sc->sc_flags = ident->flags; 491 492 if (sc->sc_flags & FL_ERASE_4K) 493 sc->sc_erasesize = 4 * 1024; 494 else if (sc->sc_flags & FL_ERASE_32K) 495 sc->sc_erasesize = 32 * 1024; 496 else 497 sc->sc_erasesize = ident->sectorsize; 498 499 if (sc->sc_flags & FL_ENABLE_4B_ADDR) { 500 if ((err = mx25l_set_4b_mode(sc, CMD_ENTER_4B_MODE)) != 0) 501 return (err); 502 } else if (sc->sc_flags & FL_DISABLE_4B_ADDR) { 503 if ((err = mx25l_set_4b_mode(sc, CMD_EXIT_4B_MODE)) != 0) 504 return (err); 505 } 506 507 sc->sc_disk = disk_alloc(); 508 sc->sc_disk->d_open = mx25l_open; 509 sc->sc_disk->d_close = mx25l_close; 510 sc->sc_disk->d_strategy = mx25l_strategy; 511 sc->sc_disk->d_getattr = mx25l_getattr; 512 sc->sc_disk->d_ioctl = mx25l_ioctl; 513 sc->sc_disk->d_name = "flash/spi"; 514 sc->sc_disk->d_drv1 = sc; 515 sc->sc_disk->d_maxsize = DFLTPHYS; 516 sc->sc_disk->d_sectorsize = MX25L_SECTORSIZE; 517 sc->sc_disk->d_mediasize = ident->sectorsize * ident->sectorcount; 518 sc->sc_disk->d_stripesize = sc->sc_erasesize; 519 sc->sc_disk->d_unit = device_get_unit(sc->sc_dev); 520 sc->sc_disk->d_dump = NULL; /* NB: no dumps */ 521 strlcpy(sc->sc_disk->d_descr, ident->name, 522 sizeof(sc->sc_disk->d_descr)); 523 524 disk_create(sc->sc_disk, DISK_VERSION); 525 bioq_init(&sc->sc_bio_queue); 526 527 kproc_create(&mx25l_task, sc, &sc->sc_p, 0, 0, "task: mx25l flash"); 528 sc->sc_taskstate = TSTATE_RUNNING; 529 530 device_printf(sc->sc_dev, 531 "device type %s, size %dK in %d sectors of %dK, erase size %dK\n", 532 ident->name, 533 ident->sectorcount * ident->sectorsize / 1024, 534 ident->sectorcount, ident->sectorsize / 1024, 535 sc->sc_erasesize / 1024); 536 537 return (0); 538 } 539 540 static int 541 mx25l_detach(device_t dev) 542 { 543 struct mx25l_softc *sc; 544 int err; 545 546 sc = device_get_softc(dev); 547 err = 0; 548 549 M25PXX_LOCK(sc); 550 if (sc->sc_taskstate == TSTATE_RUNNING) { 551 sc->sc_taskstate = TSTATE_STOPPING; 552 wakeup(sc); 553 while (err == 0 && sc->sc_taskstate != TSTATE_STOPPED) { 554 err = msleep(sc, &sc->sc_mtx, 0, "mx25dt", hz * 3); 555 if (err != 0) { 556 sc->sc_taskstate = TSTATE_RUNNING; 557 device_printf(sc->sc_dev, 558 "Failed to stop queue task\n"); 559 } 560 } 561 } 562 M25PXX_UNLOCK(sc); 563 564 if (err == 0 && sc->sc_taskstate == TSTATE_STOPPED) { 565 disk_destroy(sc->sc_disk); 566 bioq_flush(&sc->sc_bio_queue, NULL, ENXIO); 567 M25PXX_LOCK_DESTROY(sc); 568 } 569 return (err); 570 } 571 572 static int 573 mx25l_open(struct disk *dp) 574 { 575 return (0); 576 } 577 578 static int 579 mx25l_close(struct disk *dp) 580 { 581 582 return (0); 583 } 584 585 static int 586 mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag, 587 struct thread *td) 588 { 589 590 return (EINVAL); 591 } 592 593 static void 594 mx25l_strategy(struct bio *bp) 595 { 596 struct mx25l_softc *sc; 597 598 sc = (struct mx25l_softc *)bp->bio_disk->d_drv1; 599 M25PXX_LOCK(sc); 600 bioq_disksort(&sc->sc_bio_queue, bp); 601 wakeup(sc); 602 M25PXX_UNLOCK(sc); 603 } 604 605 static int 606 mx25l_getattr(struct bio *bp) 607 { 608 struct mx25l_softc *sc; 609 device_t dev; 610 611 if (bp->bio_disk == NULL || bp->bio_disk->d_drv1 == NULL) 612 return (ENXIO); 613 614 sc = bp->bio_disk->d_drv1; 615 dev = sc->sc_dev; 616 617 if (strcmp(bp->bio_attribute, "SPI::device") == 0) { 618 if (bp->bio_length != sizeof(dev)) 619 return (EFAULT); 620 bcopy(&dev, bp->bio_data, sizeof(dev)); 621 } else 622 return (-1); 623 return (0); 624 } 625 626 static void 627 mx25l_task(void *arg) 628 { 629 struct mx25l_softc *sc = (struct mx25l_softc*)arg; 630 struct bio *bp; 631 device_t dev; 632 633 for (;;) { 634 dev = sc->sc_dev; 635 M25PXX_LOCK(sc); 636 do { 637 if (sc->sc_taskstate == TSTATE_STOPPING) { 638 sc->sc_taskstate = TSTATE_STOPPED; 639 M25PXX_UNLOCK(sc); 640 wakeup(sc); 641 kproc_exit(0); 642 } 643 bp = bioq_first(&sc->sc_bio_queue); 644 if (bp == NULL) 645 msleep(sc, &sc->sc_mtx, PRIBIO, "mx25jq", 0); 646 } while (bp == NULL); 647 bioq_remove(&sc->sc_bio_queue, bp); 648 M25PXX_UNLOCK(sc); 649 650 switch (bp->bio_cmd) { 651 case BIO_READ: 652 bp->bio_error = mx25l_read(sc, bp->bio_offset, 653 bp->bio_data, bp->bio_bcount); 654 break; 655 case BIO_WRITE: 656 bp->bio_error = mx25l_write(sc, bp->bio_offset, 657 bp->bio_data, bp->bio_bcount); 658 break; 659 default: 660 bp->bio_error = EINVAL; 661 } 662 663 664 biodone(bp); 665 } 666 } 667 668 static devclass_t mx25l_devclass; 669 670 static device_method_t mx25l_methods[] = { 671 /* Device interface */ 672 DEVMETHOD(device_probe, mx25l_probe), 673 DEVMETHOD(device_attach, mx25l_attach), 674 DEVMETHOD(device_detach, mx25l_detach), 675 676 { 0, 0 } 677 }; 678 679 static driver_t mx25l_driver = { 680 "mx25l", 681 mx25l_methods, 682 sizeof(struct mx25l_softc), 683 }; 684 685 DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0); 686 MODULE_DEPEND(mx25l, spibus, 1, 1, 1); 687 #ifdef FDT 688 SPIBUS_PNP_INFO(compat_data); 689 #endif
Cache object: b456937cae18fefcc810f2b0648e5ecd
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]