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("$FreeBSD$");
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
70 struct 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
80 struct 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 */
110 static int mx25l_open(struct disk *dp);
111 static int mx25l_close(struct disk *dp);
112 static int mx25l_ioctl(struct disk *, u_long, void *, int, struct thread *);
113 static void mx25l_strategy(struct bio *bp);
114 static int mx25l_getattr(struct bio *bp);
115 static void mx25l_task(void *arg);
116
117 struct 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
152 static int
mx25l_wait_for_device_ready(struct mx25l_softc * sc)153 mx25l_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
173 static struct mx25l_flash_ident*
mx25l_get_device_ident(struct mx25l_softc * sc)174 mx25l_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
214 static int
mx25l_set_writable(struct mx25l_softc * sc,int writable)215 mx25l_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
234 static int
mx25l_erase_cmd(struct mx25l_softc * sc,off_t sector)235 mx25l_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
278 static int
mx25l_write(struct mx25l_softc * sc,off_t offset,caddr_t data,off_t count)279 mx25l_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
357 static int
mx25l_read(struct mx25l_softc * sc,off_t offset,caddr_t data,off_t count)358 mx25l_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
406 static int
mx25l_set_4b_mode(struct mx25l_softc * sc,uint8_t command)407 mx25l_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
431 static struct ofw_compat_data compat_data[] = {
432 { "st,m25p", 1 },
433 { "jedec,spi-nor", 1 },
434 { NULL, 0 },
435 };
436 #endif
437
438 static int
mx25l_probe(device_t dev)439 mx25l_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);
460 found:
461 #endif
462 device_set_desc(dev, "M25Pxx Flash Family");
463
464 return (0);
465 }
466
467 static int
mx25l_attach(device_t dev)468 mx25l_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
537 static int
mx25l_detach(device_t dev)538 mx25l_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
569 static int
mx25l_open(struct disk * dp)570 mx25l_open(struct disk *dp)
571 {
572 return (0);
573 }
574
575 static int
mx25l_close(struct disk * dp)576 mx25l_close(struct disk *dp)
577 {
578
579 return (0);
580 }
581
582 static int
mx25l_ioctl(struct disk * dp,u_long cmd,void * data,int fflag,struct thread * td)583 mx25l_ioctl(struct disk *dp, u_long cmd, void *data, int fflag,
584 struct thread *td)
585 {
586
587 return (EINVAL);
588 }
589
590 static void
mx25l_strategy(struct bio * bp)591 mx25l_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
602 static int
mx25l_getattr(struct bio * bp)603 mx25l_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
623 static void
mx25l_task(void * arg)624 mx25l_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
665 static devclass_t mx25l_devclass;
666
667 static 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
676 static driver_t mx25l_driver = {
677 "mx25l",
678 mx25l_methods,
679 sizeof(struct mx25l_softc),
680 };
681
682 DRIVER_MODULE(mx25l, spibus, mx25l_driver, mx25l_devclass, 0, 0);
683 MODULE_DEPEND(mx25l, spibus, 1, 1, 1);
684 MODULE_DEPEND(mx25l, fdt_slicer, 1, 1, 1);
685