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/module.h>
55 #include <sys/mutex.h>
56 #include <sys/syslog.h>
59 #include <machine/bus.h>
61 #include <machine/resource.h>
63 #include <dev/smbus/smbconf.h>
65 #include <dev/ichsmb/ichsmb_var.h>
66 #include <dev/ichsmb/ichsmb_reg.h>
69 * Enable debugging by defining ICHSMB_DEBUG to a non-zero value.
71 #define ICHSMB_DEBUG 0
72 #if ICHSMB_DEBUG != 0 && defined(__CC_SUPPORTS___FUNC__)
73 #define DBG(fmt, args...) \
74 do { printf("%s: " fmt, __func__ , ## args); } while (0)
76 #define DBG(fmt, args...) do { } while (0)
80 * Our child device driver name
82 #define DRIVER_SMBUS "smbus"
87 static int ichsmb_wait(sc_p sc);
89 /********************************************************************
90 BUS-INDEPENDENT BUS METHODS
91 ********************************************************************/
94 * Handle probe-time duties that are independent of the bus
95 * our device lives on.
98 ichsmb_probe(device_t dev)
100 return (BUS_PROBE_DEFAULT);
104 * Handle attach-time duties that are independent of the bus
105 * our device lives on.
108 ichsmb_attach(device_t dev)
110 const sc_p sc = device_get_softc(dev);
114 mtx_init(&sc->mutex, device_get_nameunit(dev), "ichsmb", MTX_DEF);
116 /* Add child: an instance of the "smbus" device */
117 if ((sc->smb = device_add_child(dev, DRIVER_SMBUS, -1)) == NULL) {
118 device_printf(dev, "no \"%s\" child found\n", DRIVER_SMBUS);
123 /* Clear interrupt conditions */
124 bus_write_1(sc->io_res, ICH_HST_STA, 0xff);
126 /* Set up interrupt handler */
127 error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
128 NULL, ichsmb_device_intr, sc, &sc->irq_handle);
130 device_printf(dev, "can't setup irq\n");
134 /* Attach children when interrupts are available */
135 return (bus_delayed_attach_children(dev));
137 mtx_destroy(&sc->mutex);
141 /********************************************************************
143 ********************************************************************/
146 ichsmb_callback(device_t dev, int index, void *data)
150 DBG("index=%d how=%d\n", index, data ? *(int *)data : -1);
152 case SMB_REQUEST_BUS:
154 case SMB_RELEASE_BUS:
157 smb_error = SMB_EABORT; /* XXX */
160 DBG("smb_error=%d\n", smb_error);
165 ichsmb_quick(device_t dev, u_char slave, int how)
167 const sc_p sc = device_get_softc(dev);
170 DBG("slave=0x%02x how=%d\n", slave, how);
171 KASSERT(sc->ich_cmd == -1,
172 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
176 mtx_lock(&sc->mutex);
177 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_QUICK;
178 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
179 slave | (how == SMB_QREAD ?
180 ICH_XMIT_SLVA_READ : ICH_XMIT_SLVA_WRITE));
181 bus_write_1(sc->io_res, ICH_HST_CNT,
182 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
183 smb_error = ichsmb_wait(sc);
184 mtx_unlock(&sc->mutex);
187 smb_error = SMB_ENOTSUPP;
189 DBG("smb_error=%d\n", smb_error);
194 ichsmb_sendb(device_t dev, u_char slave, char byte)
196 const sc_p sc = device_get_softc(dev);
199 DBG("slave=0x%02x byte=0x%02x\n", slave, (u_char)byte);
200 KASSERT(sc->ich_cmd == -1,
201 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
202 mtx_lock(&sc->mutex);
203 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE;
204 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
205 slave | ICH_XMIT_SLVA_WRITE);
206 bus_write_1(sc->io_res, ICH_HST_CMD, byte);
207 bus_write_1(sc->io_res, ICH_HST_CNT,
208 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
209 smb_error = ichsmb_wait(sc);
210 mtx_unlock(&sc->mutex);
211 DBG("smb_error=%d\n", smb_error);
216 ichsmb_recvb(device_t dev, u_char slave, char *byte)
218 const sc_p sc = device_get_softc(dev);
221 DBG("slave=0x%02x\n", slave);
222 KASSERT(sc->ich_cmd == -1,
223 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
224 mtx_lock(&sc->mutex);
225 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE;
226 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
227 slave | ICH_XMIT_SLVA_READ);
228 bus_write_1(sc->io_res, ICH_HST_CNT,
229 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
230 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR)
231 *byte = bus_read_1(sc->io_res, ICH_D0);
232 mtx_unlock(&sc->mutex);
233 DBG("smb_error=%d byte=0x%02x\n", smb_error, (u_char)*byte);
238 ichsmb_writeb(device_t dev, u_char slave, char cmd, char byte)
240 const sc_p sc = device_get_softc(dev);
243 DBG("slave=0x%02x cmd=0x%02x byte=0x%02x\n",
244 slave, (u_char)cmd, (u_char)byte);
245 KASSERT(sc->ich_cmd == -1,
246 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
247 mtx_lock(&sc->mutex);
248 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE_DATA;
249 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
250 slave | ICH_XMIT_SLVA_WRITE);
251 bus_write_1(sc->io_res, ICH_HST_CMD, cmd);
252 bus_write_1(sc->io_res, ICH_D0, byte);
253 bus_write_1(sc->io_res, ICH_HST_CNT,
254 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
255 smb_error = ichsmb_wait(sc);
256 mtx_unlock(&sc->mutex);
257 DBG("smb_error=%d\n", smb_error);
262 ichsmb_writew(device_t dev, u_char slave, char cmd, short word)
264 const sc_p sc = device_get_softc(dev);
267 DBG("slave=0x%02x cmd=0x%02x word=0x%04x\n",
268 slave, (u_char)cmd, (u_int16_t)word);
269 KASSERT(sc->ich_cmd == -1,
270 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
271 mtx_lock(&sc->mutex);
272 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_WORD_DATA;
273 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
274 slave | ICH_XMIT_SLVA_WRITE);
275 bus_write_1(sc->io_res, ICH_HST_CMD, cmd);
276 bus_write_1(sc->io_res, ICH_D0, word & 0xff);
277 bus_write_1(sc->io_res, ICH_D1, word >> 8);
278 bus_write_1(sc->io_res, ICH_HST_CNT,
279 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
280 smb_error = ichsmb_wait(sc);
281 mtx_unlock(&sc->mutex);
282 DBG("smb_error=%d\n", smb_error);
287 ichsmb_readb(device_t dev, u_char slave, char cmd, char *byte)
289 const sc_p sc = device_get_softc(dev);
292 DBG("slave=0x%02x cmd=0x%02x\n", slave, (u_char)cmd);
293 KASSERT(sc->ich_cmd == -1,
294 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
295 mtx_lock(&sc->mutex);
296 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE_DATA;
297 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
298 slave | ICH_XMIT_SLVA_READ);
299 bus_write_1(sc->io_res, ICH_HST_CMD, cmd);
300 bus_write_1(sc->io_res, ICH_HST_CNT,
301 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
302 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR)
303 *byte = bus_read_1(sc->io_res, ICH_D0);
304 mtx_unlock(&sc->mutex);
305 DBG("smb_error=%d byte=0x%02x\n", smb_error, (u_char)*byte);
310 ichsmb_readw(device_t dev, u_char slave, char cmd, short *word)
312 const sc_p sc = device_get_softc(dev);
315 DBG("slave=0x%02x cmd=0x%02x\n", slave, (u_char)cmd);
316 KASSERT(sc->ich_cmd == -1,
317 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
318 mtx_lock(&sc->mutex);
319 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_WORD_DATA;
320 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
321 slave | ICH_XMIT_SLVA_READ);
322 bus_write_1(sc->io_res, ICH_HST_CMD, cmd);
323 bus_write_1(sc->io_res, ICH_HST_CNT,
324 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
325 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) {
326 *word = (bus_read_1(sc->io_res,
328 | (bus_read_1(sc->io_res,
331 mtx_unlock(&sc->mutex);
332 DBG("smb_error=%d word=0x%04x\n", smb_error, (u_int16_t)*word);
337 ichsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata)
339 const sc_p sc = device_get_softc(dev);
342 DBG("slave=0x%02x cmd=0x%02x sdata=0x%04x\n",
343 slave, (u_char)cmd, (u_int16_t)sdata);
344 KASSERT(sc->ich_cmd == -1,
345 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
346 mtx_lock(&sc->mutex);
347 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_PROC_CALL;
348 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
349 slave | ICH_XMIT_SLVA_WRITE);
350 bus_write_1(sc->io_res, ICH_HST_CMD, cmd);
351 bus_write_1(sc->io_res, ICH_D0, sdata & 0xff);
352 bus_write_1(sc->io_res, ICH_D1, sdata >> 8);
353 bus_write_1(sc->io_res, ICH_HST_CNT,
354 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
355 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) {
356 *rdata = (bus_read_1(sc->io_res,
358 | (bus_read_1(sc->io_res,
361 mtx_unlock(&sc->mutex);
362 DBG("smb_error=%d rdata=0x%04x\n", smb_error, (u_int16_t)*rdata);
367 ichsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
369 const sc_p sc = device_get_softc(dev);
372 DBG("slave=0x%02x cmd=0x%02x count=%d\n", slave, (u_char)cmd, count);
374 #define DISP(ch) (((ch) < 0x20 || (ch) >= 0x7e) ? '.' : (ch))
378 for (p = (u_char *)buf; p - (u_char *)buf < 32; p += 8) {
379 DBG("%02x: %02x %02x %02x %02x %02x %02x %02x %02x"
380 " %c%c%c%c%c%c%c%c", (p - (u_char *)buf),
381 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
382 DISP(p[0]), DISP(p[1]), DISP(p[2]), DISP(p[3]),
383 DISP(p[4]), DISP(p[5]), DISP(p[6]), DISP(p[7]));
388 KASSERT(sc->ich_cmd == -1,
389 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
390 if (count < 1 || count > 32)
392 bcopy(buf, sc->block_data, count);
393 sc->block_count = count;
397 mtx_lock(&sc->mutex);
398 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BLOCK;
399 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
400 slave | ICH_XMIT_SLVA_WRITE);
401 bus_write_1(sc->io_res, ICH_HST_CMD, cmd);
402 bus_write_1(sc->io_res, ICH_D0, count);
403 bus_write_1(sc->io_res, ICH_BLOCK_DB, buf[0]);
404 bus_write_1(sc->io_res, ICH_HST_CNT,
405 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
406 smb_error = ichsmb_wait(sc);
407 mtx_unlock(&sc->mutex);
408 DBG("smb_error=%d\n", smb_error);
413 ichsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf)
415 const sc_p sc = device_get_softc(dev);
418 DBG("slave=0x%02x cmd=0x%02x count=%d\n", slave, (u_char)cmd, count);
419 KASSERT(sc->ich_cmd == -1,
420 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
421 if (*count < 1 || *count > 32)
423 bzero(sc->block_data, sizeof(sc->block_data));
428 mtx_lock(&sc->mutex);
429 sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BLOCK;
430 bus_write_1(sc->io_res, ICH_XMIT_SLVA,
431 slave | ICH_XMIT_SLVA_READ);
432 bus_write_1(sc->io_res, ICH_HST_CMD, cmd);
433 bus_write_1(sc->io_res, ICH_D0, *count); /* XXX? */
434 bus_write_1(sc->io_res, ICH_HST_CNT,
435 ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd);
436 if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) {
437 bcopy(sc->block_data, buf, min(sc->block_count, *count));
438 *count = sc->block_count;
440 mtx_unlock(&sc->mutex);
441 DBG("smb_error=%d\n", smb_error);
443 #define DISP(ch) (((ch) < 0x20 || (ch) >= 0x7e) ? '.' : (ch))
447 for (p = (u_char *)buf; p - (u_char *)buf < 32; p += 8) {
448 DBG("%02x: %02x %02x %02x %02x %02x %02x %02x %02x"
449 " %c%c%c%c%c%c%c%c", (p - (u_char *)buf),
450 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
451 DISP(p[0]), DISP(p[1]), DISP(p[2]), DISP(p[3]),
452 DISP(p[4]), DISP(p[5]), DISP(p[6]), DISP(p[7]));
460 /********************************************************************
462 ********************************************************************/
465 * This table describes what interrupts we should ever expect to
466 * see after each ICH command, not including the SMBALERT interrupt.
468 static const u_int8_t ichsmb_state_irqs[] = {
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),
474 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
476 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
478 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR),
480 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR
481 | ICH_HST_STA_BYTE_DONE_STS),
482 /* i2c read (not used) */
483 (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR
484 | ICH_HST_STA_BYTE_DONE_STS)
488 * Interrupt handler. This handler is bus-independent. Note that our
489 * interrupt may be shared, so we must handle "false" interrupts.
492 ichsmb_device_intr(void *cookie)
494 const sc_p sc = cookie;
495 const device_t dev = sc->dev;
496 const int maxloops = 16;
502 mtx_lock(&sc->mutex);
503 for (count = 0; count < maxloops; count++) {
505 /* Get and reset status bits */
506 status = bus_read_1(sc->io_res, ICH_HST_STA);
508 if ((status & ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY))
510 DBG("%d stat=0x%02x\n", count, status);
513 status &= ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY);
517 /* Check for unexpected interrupt */
518 ok_bits = ICH_HST_STA_SMBALERT_STS;
519 cmd_index = sc->ich_cmd >> 2;
520 if (sc->ich_cmd != -1) {
521 KASSERT(cmd_index < sizeof(ichsmb_state_irqs),
522 ("%s: ich_cmd=%d", device_get_nameunit(dev),
524 ok_bits |= ichsmb_state_irqs[cmd_index];
526 if ((status & ~ok_bits) != 0) {
527 device_printf(dev, "irq 0x%02x during %d\n", status,
529 bus_write_1(sc->io_res,
530 ICH_HST_STA, (status & ~ok_bits));
534 /* Handle SMBALERT interrupt */
535 if (status & ICH_HST_STA_SMBALERT_STS) {
536 static int smbalert_count = 16;
537 if (smbalert_count > 0) {
538 device_printf(dev, "SMBALERT# rec'd\n");
539 if (--smbalert_count == 0) {
541 "not logging anymore\n");
546 /* Check for bus error */
547 if (status & ICH_HST_STA_BUS_ERR) {
548 sc->smb_error = SMB_ECOLLI; /* XXX SMB_EBUSERR? */
552 /* Check for device error */
553 if (status & ICH_HST_STA_DEV_ERR) {
554 sc->smb_error = SMB_ENOACK; /* or SMB_ETIMEOUT? */
558 /* Check for byte completion in block transfer */
559 if (status & ICH_HST_STA_BYTE_DONE_STS) {
560 if (sc->block_write) {
561 if (sc->block_index < sc->block_count) {
563 /* Write next byte */
564 bus_write_1(sc->io_res,
566 sc->block_data[sc->block_index++]);
570 /* First interrupt, get the count also */
571 if (sc->block_index == 0) {
572 sc->block_count = bus_read_1(
576 /* Get next byte, if any */
577 if (sc->block_index < sc->block_count) {
580 sc->block_data[sc->block_index++] =
581 bus_read_1(sc->io_res,
584 /* Set "LAST_BYTE" bit before reading
585 the last byte of block data */
587 >= sc->block_count - 1) {
588 bus_write_1(sc->io_res,
590 ICH_HST_CNT_LAST_BYTE
598 /* Check command completion */
599 if (status & ICH_HST_STA_INTR) {
600 sc->smb_error = SMB_ENOERR;
603 bus_write_1(sc->io_res,
604 ICH_HST_STA, status);
609 /* Clear status bits and try again */
610 bus_write_1(sc->io_res, ICH_HST_STA, status);
612 mtx_unlock(&sc->mutex);
614 /* Too many loops? */
615 if (count == maxloops) {
616 device_printf(dev, "interrupt loop, status=0x%02x\n",
617 bus_read_1(sc->io_res, ICH_HST_STA));
622 * Wait for command completion. Assumes mutex is held.
623 * Returns an SMB_* error code.
628 const device_t dev = sc->dev;
629 int error, smb_error;
631 KASSERT(sc->ich_cmd != -1,
632 ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd));
633 mtx_assert(&sc->mutex, MA_OWNED);
634 error = msleep(sc, &sc->mutex, PZERO, "ichsmb", hz / 4);
635 DBG("msleep -> %d\n", error);
638 smb_error = sc->smb_error;
641 device_printf(dev, "device timeout, status=0x%02x\n",
642 bus_read_1(sc->io_res, ICH_HST_STA));
644 smb_error = SMB_ETIMEOUT;
647 smb_error = SMB_EABORT;
654 * Release resources associated with device.
657 ichsmb_release_resources(sc_p sc)
659 const device_t dev = sc->dev;
661 if (sc->irq_handle != NULL) {
662 bus_teardown_intr(dev, sc->irq_res, sc->irq_handle);
663 sc->irq_handle = NULL;
665 if (sc->irq_res != NULL) {
666 bus_release_resource(dev,
667 SYS_RES_IRQ, sc->irq_rid, sc->irq_res);
670 if (sc->io_res != NULL) {
671 bus_release_resource(dev,
672 SYS_RES_IOPORT, sc->io_rid, sc->io_res);
678 ichsmb_detach(device_t dev)
680 const sc_p sc = device_get_softc(dev);
683 error = bus_generic_detach(dev);
686 device_delete_child(dev, sc->smb);
687 ichsmb_release_resources(sc);
688 mtx_destroy(&sc->mutex);
693 DRIVER_MODULE(smbus, ichsmb, smbus_driver, smbus_devclass, 0, 0);