Deleted Added
sdiff udiff text old ( 237240 ) new ( 242625 )
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at45d.c (237240) at45d.c (242625)
1/*-
2 * Copyright (c) 2006 M. Warner Losh
3 * Copyright (c) 2011-2012 Ian Lepore
4 * Copyright (c) 2012 Marius Strobl <marius@FreeBSD.org>
5 * 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>
1/*-
2 * Copyright (c) 2006 M. Warner Losh
3 * Copyright (c) 2011-2012 Ian Lepore
4 * Copyright (c) 2012 Marius Strobl <marius@FreeBSD.org>
5 * 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: head/sys/dev/flash/at45d.c 237240 2012-06-18 20:19:07Z marius $");
29__FBSDID("$FreeBSD: head/sys/dev/flash/at45d.c 242625 2012-11-05 19:16:27Z dim $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/bio.h>
34#include <sys/bus.h>
35#include <sys/conf.h>
36#include <sys/kernel.h>
37#include <sys/kthread.h>
38#include <sys/lock.h>
39#include <sys/mbuf.h>
40#include <sys/malloc.h>
41#include <sys/module.h>
42#include <sys/mutex.h>
43#include <geom/geom_disk.h>
44
45#include <dev/spibus/spi.h>
46#include "spibus_if.h"
47
48struct at45d_flash_ident
49{
50 const char *name;
51 uint32_t jedec;
52 uint16_t pagecount;
53 uint16_t pageoffset;
54 uint16_t pagesize;
55 uint16_t pagesize2n;
56};
57
58struct at45d_softc
59{
60 struct bio_queue_head bio_queue;
61 struct mtx sc_mtx;
62 struct disk *disk;
63 struct proc *p;
64 struct intr_config_hook config_intrhook;
65 device_t dev;
66 uint16_t pagecount;
67 uint16_t pageoffset;
68 uint16_t pagesize;
69};
70
71#define AT45D_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
72#define AT45D_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
73#define AT45D_LOCK_INIT(_sc) \
74 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
75 "at45d", MTX_DEF)
76#define AT45D_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
77#define AT45D_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
78#define AT45D_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
79
80/* bus entry points */
81static device_attach_t at45d_attach;
82static device_detach_t at45d_detach;
83static device_probe_t at45d_probe;
84
85/* disk routines */
86static int at45d_close(struct disk *dp);
87static int at45d_open(struct disk *dp);
88static void at45d_strategy(struct bio *bp);
89static void at45d_task(void *arg);
90
91/* helper routines */
92static void at45d_delayed_attach(void *xsc);
93static int at45d_get_mfg_info(device_t dev, uint8_t *resp);
94static int at45d_get_status(device_t dev, uint8_t *status);
95static int at45d_wait_ready(device_t dev, uint8_t *status);
96
97#define BUFFER_TRANSFER 0x53
98#define BUFFER_COMPARE 0x60
99#define PROGRAM_THROUGH_BUFFER 0x82
100#define MANUFACTURER_ID 0x9f
101#define STATUS_REGISTER_READ 0xd7
102#define CONTINUOUS_ARRAY_READ 0xe8
103
104/*
105 * A sectorsize2n != 0 is used to indicate that a device optionally supports
106 * 2^N byte pages. If support for the latter is enabled, the sector offset
107 * has to be reduced by one.
108 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/bio.h>
34#include <sys/bus.h>
35#include <sys/conf.h>
36#include <sys/kernel.h>
37#include <sys/kthread.h>
38#include <sys/lock.h>
39#include <sys/mbuf.h>
40#include <sys/malloc.h>
41#include <sys/module.h>
42#include <sys/mutex.h>
43#include <geom/geom_disk.h>
44
45#include <dev/spibus/spi.h>
46#include "spibus_if.h"
47
48struct at45d_flash_ident
49{
50 const char *name;
51 uint32_t jedec;
52 uint16_t pagecount;
53 uint16_t pageoffset;
54 uint16_t pagesize;
55 uint16_t pagesize2n;
56};
57
58struct at45d_softc
59{
60 struct bio_queue_head bio_queue;
61 struct mtx sc_mtx;
62 struct disk *disk;
63 struct proc *p;
64 struct intr_config_hook config_intrhook;
65 device_t dev;
66 uint16_t pagecount;
67 uint16_t pageoffset;
68 uint16_t pagesize;
69};
70
71#define AT45D_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
72#define AT45D_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
73#define AT45D_LOCK_INIT(_sc) \
74 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \
75 "at45d", MTX_DEF)
76#define AT45D_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
77#define AT45D_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED);
78#define AT45D_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
79
80/* bus entry points */
81static device_attach_t at45d_attach;
82static device_detach_t at45d_detach;
83static device_probe_t at45d_probe;
84
85/* disk routines */
86static int at45d_close(struct disk *dp);
87static int at45d_open(struct disk *dp);
88static void at45d_strategy(struct bio *bp);
89static void at45d_task(void *arg);
90
91/* helper routines */
92static void at45d_delayed_attach(void *xsc);
93static int at45d_get_mfg_info(device_t dev, uint8_t *resp);
94static int at45d_get_status(device_t dev, uint8_t *status);
95static int at45d_wait_ready(device_t dev, uint8_t *status);
96
97#define BUFFER_TRANSFER 0x53
98#define BUFFER_COMPARE 0x60
99#define PROGRAM_THROUGH_BUFFER 0x82
100#define MANUFACTURER_ID 0x9f
101#define STATUS_REGISTER_READ 0xd7
102#define CONTINUOUS_ARRAY_READ 0xe8
103
104/*
105 * A sectorsize2n != 0 is used to indicate that a device optionally supports
106 * 2^N byte pages. If support for the latter is enabled, the sector offset
107 * has to be reduced by one.
108 */
109static const struct at45d_flash_ident const at45d_flash_devices[] = {
109static const struct at45d_flash_ident at45d_flash_devices[] = {
110 { "AT45DB011B", 0x1f2200, 512, 9, 264, 256 },
111 { "AT45DB021B", 0x1f2300, 1024, 9, 264, 256 },
112 { "AT45DB041x", 0x1f2400, 2028, 9, 264, 256 },
113 { "AT45DB081B", 0x1f2500, 4096, 9, 264, 256 },
114 { "AT45DB161x", 0x1f2600, 4096, 10, 528, 512 },
115 { "AT45DB321x", 0x1f2700, 8192, 10, 528, 0 },
116 { "AT45DB321x", 0x1f2701, 8192, 10, 528, 512 },
117 { "AT45DB642x", 0x1f2800, 8192, 11, 1056, 1024 }
118};
119
120static int
121at45d_get_status(device_t dev, uint8_t *status)
122{
123 uint8_t rxBuf[8], txBuf[8];
124 struct spi_command cmd;
125 int err;
126
127 memset(&cmd, 0, sizeof(cmd));
128 memset(txBuf, 0, sizeof(txBuf));
129 memset(rxBuf, 0, sizeof(rxBuf));
130
131 txBuf[0] = STATUS_REGISTER_READ;
132 cmd.tx_cmd = txBuf;
133 cmd.rx_cmd = rxBuf;
134 cmd.rx_cmd_sz = cmd.tx_cmd_sz = 2;
135 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
136 *status = rxBuf[1];
137 return (err);
138}
139
140static int
141at45d_get_mfg_info(device_t dev, uint8_t *resp)
142{
143 uint8_t rxBuf[8], txBuf[8];
144 struct spi_command cmd;
145 int err;
146
147 memset(&cmd, 0, sizeof(cmd));
148 memset(txBuf, 0, sizeof(txBuf));
149 memset(rxBuf, 0, sizeof(rxBuf));
150
151 txBuf[0] = MANUFACTURER_ID;
152 cmd.tx_cmd = &txBuf;
153 cmd.rx_cmd = &rxBuf;
154 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 5;
155 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
156 if (err)
157 return (err);
158 memcpy(resp, rxBuf + 1, 4);
159 return (0);
160}
161
162static int
163at45d_wait_ready(device_t dev, uint8_t *status)
164{
165 struct timeval now, tout;
166 int err;
167
168 getmicrouptime(&tout);
169 tout.tv_sec += 3;
170 do {
171 getmicrouptime(&now);
172 if (now.tv_sec > tout.tv_sec)
173 err = ETIMEDOUT;
174 else
175 err = at45d_get_status(dev, status);
176 } while (err == 0 && (*status & 0x80) == 0);
177 return (err);
178}
179
180static int
181at45d_probe(device_t dev)
182{
183
184 device_set_desc(dev, "AT45D Flash Family");
185 return (0);
186}
187
188static int
189at45d_attach(device_t dev)
190{
191 struct at45d_softc *sc;
192
193 sc = device_get_softc(dev);
194 sc->dev = dev;
195 AT45D_LOCK_INIT(sc);
196
197 /* We'll see what kind of flash we have later... */
198 sc->config_intrhook.ich_func = at45d_delayed_attach;
199 sc->config_intrhook.ich_arg = sc;
200 if (config_intrhook_establish(&sc->config_intrhook) != 0)
201 device_printf(dev, "config_intrhook_establish failed\n");
202 return (0);
203}
204
205static int
206at45d_detach(device_t dev)
207{
208
209 return (EBUSY) /* XXX */;
210}
211
212static void
213at45d_delayed_attach(void *xsc)
214{
215 struct at45d_softc *sc;
216 const struct at45d_flash_ident *ident;
217 u_int i;
218 uint32_t jedec;
219 uint16_t pagesize;
220 uint8_t buf[4], status;
221
222 sc = xsc;
223 ident = NULL;
224 jedec = 0;
225
226 if (at45d_wait_ready(sc->dev, &status) != 0)
227 device_printf(sc->dev, "Error waiting for device-ready.\n");
228 else if (at45d_get_mfg_info(sc->dev, buf) != 0)
229 device_printf(sc->dev, "Failed to get ID.\n");
230 else {
231 jedec = buf[0] << 16 | buf[1] << 8 | buf[2];
232 for (i = 0; i < nitems(at45d_flash_devices); i++) {
233 if (at45d_flash_devices[i].jedec == jedec) {
234 ident = &at45d_flash_devices[i];
235 break;
236 }
237 }
238 }
239 if (ident == NULL)
240 device_printf(sc->dev, "JEDEC 0x%x not in list.\n", jedec);
241 else {
242 sc->pagecount = ident->pagecount;
243 sc->pageoffset = ident->pageoffset;
244 if (ident->pagesize2n != 0 && (status & 0x01) != 0) {
245 sc->pageoffset -= 1;
246 pagesize = ident->pagesize2n;
247 } else
248 pagesize = ident->pagesize;
249 sc->pagesize = pagesize;
250
251 sc->disk = disk_alloc();
252 sc->disk->d_open = at45d_open;
253 sc->disk->d_close = at45d_close;
254 sc->disk->d_strategy = at45d_strategy;
255 sc->disk->d_name = "flash/spi";
256 sc->disk->d_drv1 = sc;
257 sc->disk->d_maxsize = DFLTPHYS;
258 sc->disk->d_sectorsize = pagesize;
259 sc->disk->d_mediasize = pagesize * ident->pagecount;
260 sc->disk->d_unit = device_get_unit(sc->dev);
261 disk_create(sc->disk, DISK_VERSION);
262 bioq_init(&sc->bio_queue);
263 kproc_create(&at45d_task, sc, &sc->p, 0, 0,
264 "task: at45d flash");
265 device_printf(sc->dev, "%s, %d bytes per page, %d pages\n",
266 ident->name, pagesize, ident->pagecount);
267 }
268
269 config_intrhook_disestablish(&sc->config_intrhook);
270}
271
272static int
273at45d_open(struct disk *dp)
274{
275
276 return (0);
277}
278
279static int
280at45d_close(struct disk *dp)
281{
282
283 return (0);
284}
285
286static void
287at45d_strategy(struct bio *bp)
288{
289 struct at45d_softc *sc;
290
291 sc = (struct at45d_softc *)bp->bio_disk->d_drv1;
292 AT45D_LOCK(sc);
293 bioq_disksort(&sc->bio_queue, bp);
294 wakeup(sc);
295 AT45D_UNLOCK(sc);
296}
297
298static void
299at45d_task(void *arg)
300{
301 uint8_t rxBuf[8], txBuf[8];
302 struct at45d_softc *sc;
303 struct bio *bp;
304 struct spi_command cmd;
305 device_t dev, pdev;
306 caddr_t buf;
307 u_long len, resid;
308 u_int addr, berr, err, offset, page;
309 uint8_t status;
310
311 sc = (struct at45d_softc*)arg;
312 dev = sc->dev;
313 pdev = device_get_parent(dev);
314 memset(&cmd, 0, sizeof(cmd));
315 memset(txBuf, 0, sizeof(txBuf));
316 memset(rxBuf, 0, sizeof(rxBuf));
317 cmd.tx_cmd = txBuf;
318 cmd.rx_cmd = rxBuf;
319
320 for (;;) {
321 AT45D_LOCK(sc);
322 do {
323 bp = bioq_takefirst(&sc->bio_queue);
324 if (bp == NULL)
325 msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
326 } while (bp == NULL);
327 AT45D_UNLOCK(sc);
328
329 berr = 0;
330 buf = bp->bio_data;
331 len = resid = bp->bio_bcount;
332 page = bp->bio_offset / sc->pagesize;
333 offset = bp->bio_offset % sc->pagesize;
334
335 switch (bp->bio_cmd) {
336 case BIO_READ:
337 txBuf[0] = CONTINUOUS_ARRAY_READ;
338 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 8;
339 cmd.tx_data = cmd.rx_data = buf;
340 break;
341 case BIO_WRITE:
342 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 4;
343 cmd.tx_data = cmd.rx_data = buf;
344 if (resid + offset > sc->pagesize)
345 len = sc->pagesize - offset;
346 break;
347 default:
348 berr = EINVAL;
349 goto out;
350 }
351
352 /*
353 * NB: for BIO_READ, this loop is only traversed once.
354 */
355 while (resid > 0) {
356 if (page > sc->pagecount) {
357 berr = EINVAL;
358 goto out;
359 }
360 addr = page << sc->pageoffset;
361 if (bp->bio_cmd == BIO_WRITE) {
362 if (len != sc->pagesize) {
363 txBuf[0] = BUFFER_TRANSFER;
364 txBuf[1] = ((addr >> 16) & 0xff);
365 txBuf[2] = ((addr >> 8) & 0xff);
366 txBuf[3] = 0;
367 cmd.tx_data_sz = cmd.rx_data_sz = 0;
368 err = SPIBUS_TRANSFER(pdev, dev,
369 &cmd);
370 if (err == 0)
371 err = at45d_wait_ready(dev,
372 &status);
373 if (err != 0) {
374 berr = EIO;
375 goto out;
376 }
377 }
378 txBuf[0] = PROGRAM_THROUGH_BUFFER;
379 }
380
381 addr += offset;
382 txBuf[1] = ((addr >> 16) & 0xff);
383 txBuf[2] = ((addr >> 8) & 0xff);
384 txBuf[3] = (addr & 0xff);
385 cmd.tx_data_sz = cmd.rx_data_sz = len;
386 err = SPIBUS_TRANSFER(pdev, dev, &cmd);
387 if (err == 0 && bp->bio_cmd != BIO_READ)
388 err = at45d_wait_ready(dev, &status);
389 if (err != 0) {
390 berr = EIO;
391 goto out;
392 }
393 if (bp->bio_cmd == BIO_WRITE) {
394 addr = page << sc->pageoffset;
395 txBuf[0] = BUFFER_COMPARE;
396 txBuf[1] = ((addr >> 16) & 0xff);
397 txBuf[2] = ((addr >> 8) & 0xff);
398 txBuf[3] = 0;
399 cmd.tx_data_sz = cmd.rx_data_sz = 0;
400 err = SPIBUS_TRANSFER(pdev, dev, &cmd);
401 if (err == 0)
402 err = at45d_wait_ready(dev, &status);
403 if (err != 0 || (status & 0x40) != 0) {
404 device_printf(dev, "comparing page "
405 "%d failed (status=0x%x)\n", addr,
406 status);
407 berr = EIO;
408 goto out;
409 }
410 }
411 page++;
412 buf += len;
413 offset = 0;
414 resid -= len;
415 if (resid > sc->pagesize)
416 len = sc->pagesize;
417 else
418 len = resid;
419 cmd.tx_data = cmd.rx_data = buf;
420 }
421 out:
422 if (berr != 0) {
423 bp->bio_flags |= BIO_ERROR;
424 bp->bio_error = berr;
425 }
426 bp->bio_resid = resid;
427 biodone(bp);
428 }
429}
430
431static devclass_t at45d_devclass;
432
433static device_method_t at45d_methods[] = {
434 /* Device interface */
435 DEVMETHOD(device_probe, at45d_probe),
436 DEVMETHOD(device_attach, at45d_attach),
437 DEVMETHOD(device_detach, at45d_detach),
438
439 DEVMETHOD_END
440};
441
442static driver_t at45d_driver = {
443 "at45d",
444 at45d_methods,
445 sizeof(struct at45d_softc),
446};
447
448DRIVER_MODULE(at45d, spibus, at45d_driver, at45d_devclass, NULL, NULL);
110 { "AT45DB011B", 0x1f2200, 512, 9, 264, 256 },
111 { "AT45DB021B", 0x1f2300, 1024, 9, 264, 256 },
112 { "AT45DB041x", 0x1f2400, 2028, 9, 264, 256 },
113 { "AT45DB081B", 0x1f2500, 4096, 9, 264, 256 },
114 { "AT45DB161x", 0x1f2600, 4096, 10, 528, 512 },
115 { "AT45DB321x", 0x1f2700, 8192, 10, 528, 0 },
116 { "AT45DB321x", 0x1f2701, 8192, 10, 528, 512 },
117 { "AT45DB642x", 0x1f2800, 8192, 11, 1056, 1024 }
118};
119
120static int
121at45d_get_status(device_t dev, uint8_t *status)
122{
123 uint8_t rxBuf[8], txBuf[8];
124 struct spi_command cmd;
125 int err;
126
127 memset(&cmd, 0, sizeof(cmd));
128 memset(txBuf, 0, sizeof(txBuf));
129 memset(rxBuf, 0, sizeof(rxBuf));
130
131 txBuf[0] = STATUS_REGISTER_READ;
132 cmd.tx_cmd = txBuf;
133 cmd.rx_cmd = rxBuf;
134 cmd.rx_cmd_sz = cmd.tx_cmd_sz = 2;
135 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
136 *status = rxBuf[1];
137 return (err);
138}
139
140static int
141at45d_get_mfg_info(device_t dev, uint8_t *resp)
142{
143 uint8_t rxBuf[8], txBuf[8];
144 struct spi_command cmd;
145 int err;
146
147 memset(&cmd, 0, sizeof(cmd));
148 memset(txBuf, 0, sizeof(txBuf));
149 memset(rxBuf, 0, sizeof(rxBuf));
150
151 txBuf[0] = MANUFACTURER_ID;
152 cmd.tx_cmd = &txBuf;
153 cmd.rx_cmd = &rxBuf;
154 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 5;
155 err = SPIBUS_TRANSFER(device_get_parent(dev), dev, &cmd);
156 if (err)
157 return (err);
158 memcpy(resp, rxBuf + 1, 4);
159 return (0);
160}
161
162static int
163at45d_wait_ready(device_t dev, uint8_t *status)
164{
165 struct timeval now, tout;
166 int err;
167
168 getmicrouptime(&tout);
169 tout.tv_sec += 3;
170 do {
171 getmicrouptime(&now);
172 if (now.tv_sec > tout.tv_sec)
173 err = ETIMEDOUT;
174 else
175 err = at45d_get_status(dev, status);
176 } while (err == 0 && (*status & 0x80) == 0);
177 return (err);
178}
179
180static int
181at45d_probe(device_t dev)
182{
183
184 device_set_desc(dev, "AT45D Flash Family");
185 return (0);
186}
187
188static int
189at45d_attach(device_t dev)
190{
191 struct at45d_softc *sc;
192
193 sc = device_get_softc(dev);
194 sc->dev = dev;
195 AT45D_LOCK_INIT(sc);
196
197 /* We'll see what kind of flash we have later... */
198 sc->config_intrhook.ich_func = at45d_delayed_attach;
199 sc->config_intrhook.ich_arg = sc;
200 if (config_intrhook_establish(&sc->config_intrhook) != 0)
201 device_printf(dev, "config_intrhook_establish failed\n");
202 return (0);
203}
204
205static int
206at45d_detach(device_t dev)
207{
208
209 return (EBUSY) /* XXX */;
210}
211
212static void
213at45d_delayed_attach(void *xsc)
214{
215 struct at45d_softc *sc;
216 const struct at45d_flash_ident *ident;
217 u_int i;
218 uint32_t jedec;
219 uint16_t pagesize;
220 uint8_t buf[4], status;
221
222 sc = xsc;
223 ident = NULL;
224 jedec = 0;
225
226 if (at45d_wait_ready(sc->dev, &status) != 0)
227 device_printf(sc->dev, "Error waiting for device-ready.\n");
228 else if (at45d_get_mfg_info(sc->dev, buf) != 0)
229 device_printf(sc->dev, "Failed to get ID.\n");
230 else {
231 jedec = buf[0] << 16 | buf[1] << 8 | buf[2];
232 for (i = 0; i < nitems(at45d_flash_devices); i++) {
233 if (at45d_flash_devices[i].jedec == jedec) {
234 ident = &at45d_flash_devices[i];
235 break;
236 }
237 }
238 }
239 if (ident == NULL)
240 device_printf(sc->dev, "JEDEC 0x%x not in list.\n", jedec);
241 else {
242 sc->pagecount = ident->pagecount;
243 sc->pageoffset = ident->pageoffset;
244 if (ident->pagesize2n != 0 && (status & 0x01) != 0) {
245 sc->pageoffset -= 1;
246 pagesize = ident->pagesize2n;
247 } else
248 pagesize = ident->pagesize;
249 sc->pagesize = pagesize;
250
251 sc->disk = disk_alloc();
252 sc->disk->d_open = at45d_open;
253 sc->disk->d_close = at45d_close;
254 sc->disk->d_strategy = at45d_strategy;
255 sc->disk->d_name = "flash/spi";
256 sc->disk->d_drv1 = sc;
257 sc->disk->d_maxsize = DFLTPHYS;
258 sc->disk->d_sectorsize = pagesize;
259 sc->disk->d_mediasize = pagesize * ident->pagecount;
260 sc->disk->d_unit = device_get_unit(sc->dev);
261 disk_create(sc->disk, DISK_VERSION);
262 bioq_init(&sc->bio_queue);
263 kproc_create(&at45d_task, sc, &sc->p, 0, 0,
264 "task: at45d flash");
265 device_printf(sc->dev, "%s, %d bytes per page, %d pages\n",
266 ident->name, pagesize, ident->pagecount);
267 }
268
269 config_intrhook_disestablish(&sc->config_intrhook);
270}
271
272static int
273at45d_open(struct disk *dp)
274{
275
276 return (0);
277}
278
279static int
280at45d_close(struct disk *dp)
281{
282
283 return (0);
284}
285
286static void
287at45d_strategy(struct bio *bp)
288{
289 struct at45d_softc *sc;
290
291 sc = (struct at45d_softc *)bp->bio_disk->d_drv1;
292 AT45D_LOCK(sc);
293 bioq_disksort(&sc->bio_queue, bp);
294 wakeup(sc);
295 AT45D_UNLOCK(sc);
296}
297
298static void
299at45d_task(void *arg)
300{
301 uint8_t rxBuf[8], txBuf[8];
302 struct at45d_softc *sc;
303 struct bio *bp;
304 struct spi_command cmd;
305 device_t dev, pdev;
306 caddr_t buf;
307 u_long len, resid;
308 u_int addr, berr, err, offset, page;
309 uint8_t status;
310
311 sc = (struct at45d_softc*)arg;
312 dev = sc->dev;
313 pdev = device_get_parent(dev);
314 memset(&cmd, 0, sizeof(cmd));
315 memset(txBuf, 0, sizeof(txBuf));
316 memset(rxBuf, 0, sizeof(rxBuf));
317 cmd.tx_cmd = txBuf;
318 cmd.rx_cmd = rxBuf;
319
320 for (;;) {
321 AT45D_LOCK(sc);
322 do {
323 bp = bioq_takefirst(&sc->bio_queue);
324 if (bp == NULL)
325 msleep(sc, &sc->sc_mtx, PRIBIO, "jobqueue", 0);
326 } while (bp == NULL);
327 AT45D_UNLOCK(sc);
328
329 berr = 0;
330 buf = bp->bio_data;
331 len = resid = bp->bio_bcount;
332 page = bp->bio_offset / sc->pagesize;
333 offset = bp->bio_offset % sc->pagesize;
334
335 switch (bp->bio_cmd) {
336 case BIO_READ:
337 txBuf[0] = CONTINUOUS_ARRAY_READ;
338 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 8;
339 cmd.tx_data = cmd.rx_data = buf;
340 break;
341 case BIO_WRITE:
342 cmd.tx_cmd_sz = cmd.rx_cmd_sz = 4;
343 cmd.tx_data = cmd.rx_data = buf;
344 if (resid + offset > sc->pagesize)
345 len = sc->pagesize - offset;
346 break;
347 default:
348 berr = EINVAL;
349 goto out;
350 }
351
352 /*
353 * NB: for BIO_READ, this loop is only traversed once.
354 */
355 while (resid > 0) {
356 if (page > sc->pagecount) {
357 berr = EINVAL;
358 goto out;
359 }
360 addr = page << sc->pageoffset;
361 if (bp->bio_cmd == BIO_WRITE) {
362 if (len != sc->pagesize) {
363 txBuf[0] = BUFFER_TRANSFER;
364 txBuf[1] = ((addr >> 16) & 0xff);
365 txBuf[2] = ((addr >> 8) & 0xff);
366 txBuf[3] = 0;
367 cmd.tx_data_sz = cmd.rx_data_sz = 0;
368 err = SPIBUS_TRANSFER(pdev, dev,
369 &cmd);
370 if (err == 0)
371 err = at45d_wait_ready(dev,
372 &status);
373 if (err != 0) {
374 berr = EIO;
375 goto out;
376 }
377 }
378 txBuf[0] = PROGRAM_THROUGH_BUFFER;
379 }
380
381 addr += offset;
382 txBuf[1] = ((addr >> 16) & 0xff);
383 txBuf[2] = ((addr >> 8) & 0xff);
384 txBuf[3] = (addr & 0xff);
385 cmd.tx_data_sz = cmd.rx_data_sz = len;
386 err = SPIBUS_TRANSFER(pdev, dev, &cmd);
387 if (err == 0 && bp->bio_cmd != BIO_READ)
388 err = at45d_wait_ready(dev, &status);
389 if (err != 0) {
390 berr = EIO;
391 goto out;
392 }
393 if (bp->bio_cmd == BIO_WRITE) {
394 addr = page << sc->pageoffset;
395 txBuf[0] = BUFFER_COMPARE;
396 txBuf[1] = ((addr >> 16) & 0xff);
397 txBuf[2] = ((addr >> 8) & 0xff);
398 txBuf[3] = 0;
399 cmd.tx_data_sz = cmd.rx_data_sz = 0;
400 err = SPIBUS_TRANSFER(pdev, dev, &cmd);
401 if (err == 0)
402 err = at45d_wait_ready(dev, &status);
403 if (err != 0 || (status & 0x40) != 0) {
404 device_printf(dev, "comparing page "
405 "%d failed (status=0x%x)\n", addr,
406 status);
407 berr = EIO;
408 goto out;
409 }
410 }
411 page++;
412 buf += len;
413 offset = 0;
414 resid -= len;
415 if (resid > sc->pagesize)
416 len = sc->pagesize;
417 else
418 len = resid;
419 cmd.tx_data = cmd.rx_data = buf;
420 }
421 out:
422 if (berr != 0) {
423 bp->bio_flags |= BIO_ERROR;
424 bp->bio_error = berr;
425 }
426 bp->bio_resid = resid;
427 biodone(bp);
428 }
429}
430
431static devclass_t at45d_devclass;
432
433static device_method_t at45d_methods[] = {
434 /* Device interface */
435 DEVMETHOD(device_probe, at45d_probe),
436 DEVMETHOD(device_attach, at45d_attach),
437 DEVMETHOD(device_detach, at45d_detach),
438
439 DEVMETHOD_END
440};
441
442static driver_t at45d_driver = {
443 "at45d",
444 at45d_methods,
445 sizeof(struct at45d_softc),
446};
447
448DRIVER_MODULE(at45d, spibus, at45d_driver, at45d_devclass, NULL, NULL);