4 * Author: Archie Cobbs <archie@freebsd.org>
5 * Copyright (c) 2000 Whistle Communications, Inc.
8 * Subject to the following obligations and disclaimer of warranty, use and
9 * redistribution of this software, in source or object code forms, with or
10 * without modifications are expressly permitted by Whistle Communications;
11 * provided, however, that:
12 * 1. Any and all reproductions of the source or object code must include the
13 * copyright notice above and the following disclaimer of warranties; and
14 * 2. No rights are granted, in any manner or form, to use Whistle
15 * Communications, Inc. trademarks, including the mark "WHISTLE
16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
17 * such appears in the above copyright notice or in the software.
19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * Support for the SMBus controller logical device which is part of the
43 * Intel 81801AA (ICH) and 81801AB (ICH0) I/O controller hub chips.
45 * This driver assumes that the generic SMBus code will ensure that
46 * at most one process at a time calls into the SMBus methods below.
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
52 #include <sys/errno.h>
54 #include <sys/mutex.h>
55 #include <sys/syslog.h>
58 #include <machine/bus.h>
60 #include <machine/resource.h>
62 #include <dev/smbus/smbconf.h>
64 #include <dev/ichsmb/ichsmb_var.h>
65 #include <dev/ichsmb/ichsmb_reg.h>
68 * Enable debugging by defining ICHSMB_DEBUG to a non-zero value.
70 #define ICHSMB_DEBUG 0
71 #if ICHSMB_DEBUG != 0 && (defined(__GNUC__) || defined(__INTEL_COMPILER))
72 #define DBG(fmt, args...) \
73 do { log(LOG_DEBUG, "%s: " fmt, __func__ , ## args); } while (0)
75 #define DBG(fmt, args...) do { } while (0)
79 * Our child device driver name
81 #define DRIVER_SMBUS "smbus"
86 static int ichsmb_wait(sc_p sc);
88 /********************************************************************
89 BUS-INDEPENDENT BUS METHODS
90 ********************************************************************/
93 * Handle probe-time duties that are independent of the bus
94 * our device lives on.
97 ichsmb_probe(device_t dev)
101 /* Add child: an instance of the "smbus" device */
102 if ((smb = device_add_child(dev, DRIVER_SMBUS, -1)) == NULL) {
103 log(LOG_ERR, "%s: no \"%s\" child found\n",
104 device_get_nameunit(dev), DRIVER_SMBUS);
111 * Handle attach-time duties that are independent of the bus
112 * our device lives on.
115 ichsmb_attach(device_t dev)
117 const sc_p sc = device_get_softc(dev);
120 /* Clear interrupt conditions */
121 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_STA, 0xff);
123 /* Add "smbus" child */
124 if ((error = bus_generic_attach(dev)) != 0) {
125 log(LOG_ERR, "%s: failed to attach child: %d\n",
126 device_get_nameunit(dev), error);
131 mtx_init(&sc->mutex, device_get_nameunit(dev), "ichsmb", MTX_DEF);
135 /********************************************************************
137 ********************************************************************/
140 ichsmb_callback(device_t dev, int index, caddr_t data)
144 DBG("index=%d how=%d\n", index, data ? *(int *)data : -1);
146 case SMB_REQUEST_BUS:
148 case SMB_RELEASE_BUS:
151 smb_error = SMB_EABORT; /* XXX */
154 DBG("smb_error=%d\n", smb_error);
159 ichsmb_quick(device_t dev, u_char slave, int how)
161 const sc_p sc = device_get_softc(dev);
164 DBG("slave=0x%02x how=%d\n", slave, how);
165 KASSERT(sc->ich_cmd == -1,
166 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
170 mtx_lock(&sc->mutex);
171 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_QUICK;
172 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
173 (slave << 1) | (how == SMB_QREAD ?
174 ICH_XMIT_SLVA_READ : ICH_XMIT_SLVA_WRITE));
175 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
176 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
177 smb_error = ichsmb_wait(sc);
178 mtx_unlock(&sc->mutex);
181 smb_error = SMB_ENOTSUPP;
183 DBG("smb_error=%d\n", smb_error);
188 ichsmb_sendb(device_t dev, u_char slave, char byte)
190 const sc_p sc = device_get_softc(dev);
193 DBG("slave=0x%02x byte=0x%02x\n", slave, (u_char)byte);
194 KASSERT(sc->ich_cmd == -1,
195 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
196 mtx_lock(&sc->mutex);
197 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE;
198 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
199 (slave << 1) | ICH_XMIT_SLVA_WRITE);
200 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, byte);
201 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
202 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
203 smb_error = ichsmb_wait(sc);
204 mtx_unlock(&sc->mutex);
205 DBG("smb_error=%d\n", smb_error);
210 ichsmb_recvb(device_t dev, u_char slave, char *byte)
212 const sc_p sc = device_get_softc(dev);
215 DBG("slave=0x%02x\n", slave);
216 KASSERT(sc->ich_cmd == -1,
217 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
218 mtx_lock(&sc->mutex);
219 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE;
220 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
221 (slave << 1) | ICH_XMIT_SLVA_READ);
222 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
223 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
224 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR)
225 *byte = bus_space_read_1(sc->io_bst, sc->io_bsh, ICH_D0);
226 mtx_unlock(&sc->mutex);
227 DBG("smb_error=%d byte=0x%02x\n", smb_error, (u_char)*byte);
232 ichsmb_writeb(device_t dev, u_char slave, char cmd, char byte)
234 const sc_p sc = device_get_softc(dev);
237 DBG("slave=0x%02x cmd=0x%02x byte=0x%02x\n",
238 slave, (u_char)cmd, (u_char)byte);
239 KASSERT(sc->ich_cmd == -1,
240 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
241 mtx_lock(&sc->mutex);
242 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE_DATA;
243 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
244 (slave << 1) | ICH_XMIT_SLVA_WRITE);
245 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, cmd);
246 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_D0, byte);
247 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
248 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
249 smb_error = ichsmb_wait(sc);
250 mtx_unlock(&sc->mutex);
251 DBG("smb_error=%d\n", smb_error);
256 ichsmb_writew(device_t dev, u_char slave, char cmd, short word)
258 const sc_p sc = device_get_softc(dev);
261 DBG("slave=0x%02x cmd=0x%02x word=0x%04x\n",
262 slave, (u_char)cmd, (u_int16_t)word);
263 KASSERT(sc->ich_cmd == -1,
264 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
265 mtx_lock(&sc->mutex);
266 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_WORD_DATA;
267 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
268 (slave << 1) | ICH_XMIT_SLVA_WRITE);
269 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, cmd);
270 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_D0, word & 0xff);
271 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_D1, word >> 8);
272 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
273 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
274 smb_error = ichsmb_wait(sc);
275 mtx_unlock(&sc->mutex);
276 DBG("smb_error=%d\n", smb_error);
281 ichsmb_readb(device_t dev, u_char slave, char cmd, char *byte)
283 const sc_p sc = device_get_softc(dev);
286 DBG("slave=0x%02x cmd=0x%02x\n", slave, (u_char)cmd);
287 KASSERT(sc->ich_cmd == -1,
288 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
289 mtx_lock(&sc->mutex);
290 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE_DATA;
291 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
292 (slave << 1) | ICH_XMIT_SLVA_READ);
293 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, cmd);
294 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
295 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
296 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR)
297 *byte = bus_space_read_1(sc->io_bst, sc->io_bsh, ICH_D0);
298 mtx_unlock(&sc->mutex);
299 DBG("smb_error=%d byte=0x%02x\n", smb_error, (u_char)*byte);
304 ichsmb_readw(device_t dev, u_char slave, char cmd, short *word)
306 const sc_p sc = device_get_softc(dev);
309 DBG("slave=0x%02x cmd=0x%02x\n", slave, (u_char)cmd);
310 KASSERT(sc->ich_cmd == -1,
311 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
312 mtx_lock(&sc->mutex);
313 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_WORD_DATA;
314 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
315 (slave << 1) | ICH_XMIT_SLVA_READ);
316 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, cmd);
317 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
318 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
319 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) {
320 *word = (bus_space_read_1(sc->io_bst,
321 sc->io_bsh, ICH_D0) & 0xff)
322 | (bus_space_read_1(sc->io_bst,
323 sc->io_bsh, ICH_D1) << 8);
325 mtx_unlock(&sc->mutex);
326 DBG("smb_error=%d word=0x%04x\n", smb_error, (u_int16_t)*word);
331 ichsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata)
333 const sc_p sc = device_get_softc(dev);
336 DBG("slave=0x%02x cmd=0x%02x sdata=0x%04x\n",
337 slave, (u_char)cmd, (u_int16_t)sdata);
338 KASSERT(sc->ich_cmd == -1,
339 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
340 mtx_lock(&sc->mutex);
341 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_PROC_CALL;
342 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
343 (slave << 1) | ICH_XMIT_SLVA_WRITE);
344 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, cmd);
345 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_D0, sdata & 0xff);
346 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_D1, sdata >> 8);
347 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
348 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
349 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) {
350 *rdata = (bus_space_read_1(sc->io_bst,
351 sc->io_bsh, ICH_D0) & 0xff)
352 | (bus_space_read_1(sc->io_bst,
353 sc->io_bsh, ICH_D1) << 8);
355 mtx_unlock(&sc->mutex);
356 DBG("smb_error=%d rdata=0x%04x\n", smb_error, (u_int16_t)*rdata);
361 ichsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
363 const sc_p sc = device_get_softc(dev);
366 DBG("slave=0x%02x cmd=0x%02x count=%d\n", slave, (u_char)cmd, count);
368 #define DISP(ch) (((ch) < 0x20 || (ch) >= 0x7e) ? '.' : (ch))
372 for (p = (u_char *)buf; p - (u_char *)buf < 32; p += 8) {
373 DBG("%02x: %02x %02x %02x %02x %02x %02x %02x %02x"
374 " %c%c%c%c%c%c%c%c", (p - (u_char *)buf),
375 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
376 DISP(p[0]), DISP(p[1]), DISP(p[2]), DISP(p[3]),
377 DISP(p[4]), DISP(p[5]), DISP(p[6]), DISP(p[7]));
382 KASSERT(sc->ich_cmd == -1,
383 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
384 if (count < 1 || count > 32)
386 bcopy(buf, sc->block_data, count);
387 sc->block_count = count;
391 mtx_lock(&sc->mutex);
392 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BLOCK;
393 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
394 (slave << 1) | ICH_XMIT_SLVA_WRITE);
395 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, cmd);
396 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_D0, count);
397 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_BLOCK_DB, buf[0]);
398 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
399 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
400 smb_error = ichsmb_wait(sc);
401 mtx_unlock(&sc->mutex);
402 DBG("smb_error=%d\n", smb_error);
407 ichsmb_bread(device_t dev, u_char slave, char cmd, u_char count, char *buf)
409 const sc_p sc = device_get_softc(dev);
412 DBG("slave=0x%02x cmd=0x%02x count=%d\n", slave, (u_char)cmd, count);
413 KASSERT(sc->ich_cmd == -1,
414 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
415 if (count < 1 || count > 32)
417 bzero(sc->block_data, sizeof(sc->block_data));
418 sc->block_count = count;
422 mtx_lock(&sc->mutex);
423 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BLOCK;
424 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_XMIT_SLVA,
425 (slave << 1) | ICH_XMIT_SLVA_READ);
426 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CMD, cmd);
427 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_D0, count); /* XXX? */
428 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_CNT,
429 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
430 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR)
431 bcopy(sc->block_data, buf, sc->block_count);
432 mtx_unlock(&sc->mutex);
433 DBG("smb_error=%d\n", smb_error);
435 #define DISP(ch) (((ch) < 0x20 || (ch) >= 0x7e) ? '.' : (ch))
439 for (p = (u_char *)buf; p - (u_char *)buf < 32; p += 8) {
440 DBG("%02x: %02x %02x %02x %02x %02x %02x %02x %02x"
441 " %c%c%c%c%c%c%c%c", (p - (u_char *)buf),
442 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
443 DISP(p[0]), DISP(p[1]), DISP(p[2]), DISP(p[3]),
444 DISP(p[4]), DISP(p[5]), DISP(p[6]), DISP(p[7]));
452 /********************************************************************
454 ********************************************************************/
457 * This table describes what interrupts we should ever expect to
458 * see after each ICH command, not including the SMBALERT interrupt.
460 static const u_int8_t ichsmb_state_irqs[] = {
462 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
464 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
466 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
468 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
470 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
472 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR
473 | ICH_HST_STA_BYTE_DONE_STS),
474 /* i2c read (not used) */
475 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR
476 | ICH_HST_STA_BYTE_DONE_STS)
480 * Interrupt handler. This handler is bus-independent. Note that our
481 * interrupt may be shared, so we must handle "false" interrupts.
484 ichsmb_device_intr(void *cookie)
486 const sc_p sc = cookie;
487 const device_t dev = sc->dev;
488 const int maxloops = 16;
494 mtx_lock(&sc->mutex);
495 for (count = 0; count < maxloops; count++) {
497 /* Get and reset status bits */
498 status = bus_space_read_1(sc->io_bst, sc->io_bsh, ICH_HST_STA);
500 if ((status & ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY))
502 DBG("%d stat=0x%02x\n", count, status);
505 status &= ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY);
509 /* Check for unexpected interrupt */
510 ok_bits = ICH_HST_STA_SMBALERT_STS;
511 cmd_index = sc->ich_cmd >> 2;
512 if (sc->ich_cmd != -1) {
513 KASSERT(cmd_index < sizeof(ichsmb_state_irqs),
514 ("%s: ich_cmd=%d", device_get_nameunit(dev),
516 ok_bits |= ichsmb_state_irqs[cmd_index];
518 if ((status & ~ok_bits) != 0) {
519 log(LOG_ERR, "%s: irq 0x%02x during %d\n",
520 device_get_nameunit(dev), status, cmd_index);
521 bus_space_write_1(sc->io_bst, sc->io_bsh,
522 ICH_HST_STA, (status & ~ok_bits));
526 /* Handle SMBALERT interrupt */
527 if (status & ICH_HST_STA_SMBALERT_STS) {
528 static int smbalert_count = 16;
529 if (smbalert_count > 0) {
530 log(LOG_WARNING, "%s: SMBALERT# rec'd\n",
531 device_get_nameunit(dev));
532 if (--smbalert_count == 0) {
534 "%s: not logging anymore\n",
535 device_get_nameunit(dev));
540 /* Check for bus error */
541 if (status & ICH_HST_STA_BUS_ERR) {
542 sc->smb_error = SMB_ECOLLI; /* XXX SMB_EBUSERR? */
546 /* Check for device error */
547 if (status & ICH_HST_STA_DEV_ERR) {
548 sc->smb_error = SMB_ENOACK; /* or SMB_ETIMEOUT? */
552 /* Check for byte completion in block transfer */
553 if (status & ICH_HST_STA_BYTE_DONE_STS) {
554 if (sc->block_write) {
555 if (sc->block_index < sc->block_count) {
557 /* Write next byte */
558 bus_space_write_1(sc->io_bst,
559 sc->io_bsh, ICH_BLOCK_DB,
560 sc->block_data[sc->block_index++]);
564 /* First interrupt, get the count also */
565 if (sc->block_index == 0) {
566 sc->block_count = bus_space_read_1(
567 sc->io_bst, sc->io_bsh, ICH_D0);
570 /* Get next byte, if any */
571 if (sc->block_index < sc->block_count) {
574 sc->block_data[sc->block_index++] =
575 bus_space_read_1(sc->io_bst,
576 sc->io_bsh, ICH_BLOCK_DB);
578 /* Set "LAST_BYTE" bit before reading
579 the last byte of block data */
581 >= sc->block_count - 1) {
582 bus_space_write_1(sc->io_bst,
583 sc->io_bsh, ICH_HST_CNT,
584 ICH_HST_CNT_LAST_BYTE
592 /* Check command completion */
593 if (status & ICH_HST_STA_INTR) {
594 sc->smb_error = SMB_ENOERR;
597 bus_space_write_1(sc->io_bst, sc->io_bsh,
598 ICH_HST_STA, status);
603 /* Clear status bits and try again */
604 bus_space_write_1(sc->io_bst, sc->io_bsh, ICH_HST_STA, status);
606 mtx_unlock(&sc->mutex);
608 /* Too many loops? */
609 if (count == maxloops) {
610 log(LOG_ERR, "%s: interrupt loop, status=0x%02x\n",
611 device_get_nameunit(dev),
612 bus_space_read_1(sc->io_bst, sc->io_bsh, ICH_HST_STA));
617 * Wait for command completion. Assumes mutex is held.
618 * Returns an SMB_* error code.
623 const device_t dev = sc->dev;
624 int error, smb_error;
626 KASSERT(sc->ich_cmd != -1,
627 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
628 mtx_assert(&sc->mutex, MA_OWNED);
630 error = msleep(sc, &sc->mutex, PZERO | PCATCH, "ichsmb", hz / 4);
631 DBG("msleep -> %d\n", error);
634 if (sc->ich_cmd != -1)
638 smb_error = sc->smb_error;
641 log(LOG_ERR, "%s: device timeout, status=0x%02x\n",
642 device_get_nameunit(dev),
643 bus_space_read_1(sc->io_bst, sc->io_bsh, ICH_HST_STA));
645 smb_error = SMB_ETIMEOUT;
648 smb_error = SMB_EABORT;
655 * Release resources associated with device.
658 ichsmb_release_resources(sc_p sc)
660 const device_t dev = sc->dev;
662 if (sc->irq_handle != NULL) {
663 bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
664 sc->irq_handle = NULL;
666 if (sc->irq_res != NULL) {
667 bus_release_resource(dev,
668 SYS_RES_IRQ, sc->irq_rid, sc->irq_res);
671 if (sc->io_res != NULL) {
672 bus_release_resource(dev,
673 SYS_RES_IOPORT, sc->io_rid, sc->io_res);