diff --git a/sys/dev/ichsmb/ichsmb.c b/sys/dev/ichsmb/ichsmb.c index 5354d5ca94c6..ca7c185ec73b 100644 --- a/sys/dev/ichsmb/ichsmb.c +++ b/sys/dev/ichsmb/ichsmb.c @@ -1,693 +1,693 @@ /*- * ichsmb.c * * Author: Archie Cobbs * Copyright (c) 2000 Whistle Communications, Inc. * All rights reserved. * * Subject to the following obligations and disclaimer of warranty, use and * redistribution of this software, in source or object code forms, with or * without modifications are expressly permitted by Whistle Communications; * provided, however, that: * 1. Any and all reproductions of the source or object code must include the * copyright notice above and the following disclaimer of warranties; and * 2. No rights are granted, in any manner or form, to use Whistle * Communications, Inc. trademarks, including the mark "WHISTLE * COMMUNICATIONS" on advertising, endorsements, or otherwise except as * such appears in the above copyright notice or in the software. * * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); /* * Support for the SMBus controller logical device which is part of the * Intel 81801AA (ICH) and 81801AB (ICH0) I/O controller hub chips. * * This driver assumes that the generic SMBus code will ensure that * at most one process at a time calls into the SMBus methods below. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Enable debugging by defining ICHSMB_DEBUG to a non-zero value. */ #define ICHSMB_DEBUG 0 -#if ICHSMB_DEBUG != 0 && defined(__CC_SUPPORTS___FUNC__) +#if ICHSMB_DEBUG != 0 #define DBG(fmt, args...) \ do { printf("%s: " fmt, __func__ , ## args); } while (0) #else #define DBG(fmt, args...) do { } while (0) #endif /* * Our child device driver name */ #define DRIVER_SMBUS "smbus" /* * Internal functions */ static int ichsmb_wait(sc_p sc); /******************************************************************** BUS-INDEPENDENT BUS METHODS ********************************************************************/ /* * Handle probe-time duties that are independent of the bus * our device lives on. */ int ichsmb_probe(device_t dev) { return (BUS_PROBE_DEFAULT); } /* * Handle attach-time duties that are independent of the bus * our device lives on. */ int ichsmb_attach(device_t dev) { const sc_p sc = device_get_softc(dev); int error; /* Create mutex */ mtx_init(&sc->mutex, device_get_nameunit(dev), "ichsmb", MTX_DEF); /* Add child: an instance of the "smbus" device */ if ((sc->smb = device_add_child(dev, DRIVER_SMBUS, -1)) == NULL) { device_printf(dev, "no \"%s\" child found\n", DRIVER_SMBUS); error = ENXIO; goto fail; } /* Clear interrupt conditions */ bus_write_1(sc->io_res, ICH_HST_STA, 0xff); /* Set up interrupt handler */ error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, NULL, ichsmb_device_intr, sc, &sc->irq_handle); if (error != 0) { device_printf(dev, "can't setup irq\n"); goto fail; } /* Attach children when interrupts are available */ return (bus_delayed_attach_children(dev)); fail: mtx_destroy(&sc->mutex); return (error); } /******************************************************************** SMBUS METHODS ********************************************************************/ int ichsmb_callback(device_t dev, int index, void *data) { int smb_error = 0; DBG("index=%d how=%d\n", index, data ? *(int *)data : -1); switch (index) { case SMB_REQUEST_BUS: break; case SMB_RELEASE_BUS: break; default: smb_error = SMB_EABORT; /* XXX */ break; } DBG("smb_error=%d\n", smb_error); return (smb_error); } int ichsmb_quick(device_t dev, u_char slave, int how) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x how=%d\n", slave, how); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); switch (how) { case SMB_QREAD: case SMB_QWRITE: mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_QUICK; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | (how == SMB_QREAD ? ICH_XMIT_SLVA_READ : ICH_XMIT_SLVA_WRITE)); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); smb_error = ichsmb_wait(sc); mtx_unlock(&sc->mutex); break; default: smb_error = SMB_ENOTSUPP; } DBG("smb_error=%d\n", smb_error); return (smb_error); } int ichsmb_sendb(device_t dev, u_char slave, char byte) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x byte=0x%02x\n", slave, (u_char)byte); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_WRITE); bus_write_1(sc->io_res, ICH_HST_CMD, byte); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); smb_error = ichsmb_wait(sc); mtx_unlock(&sc->mutex); DBG("smb_error=%d\n", smb_error); return (smb_error); } int ichsmb_recvb(device_t dev, u_char slave, char *byte) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x\n", slave); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_READ); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) *byte = bus_read_1(sc->io_res, ICH_D0); mtx_unlock(&sc->mutex); DBG("smb_error=%d byte=0x%02x\n", smb_error, (u_char)*byte); return (smb_error); } int ichsmb_writeb(device_t dev, u_char slave, char cmd, char byte) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x cmd=0x%02x byte=0x%02x\n", slave, (u_char)cmd, (u_char)byte); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE_DATA; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_WRITE); bus_write_1(sc->io_res, ICH_HST_CMD, cmd); bus_write_1(sc->io_res, ICH_D0, byte); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); smb_error = ichsmb_wait(sc); mtx_unlock(&sc->mutex); DBG("smb_error=%d\n", smb_error); return (smb_error); } int ichsmb_writew(device_t dev, u_char slave, char cmd, short word) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x cmd=0x%02x word=0x%04x\n", slave, (u_char)cmd, (u_int16_t)word); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_WORD_DATA; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_WRITE); bus_write_1(sc->io_res, ICH_HST_CMD, cmd); bus_write_1(sc->io_res, ICH_D0, word & 0xff); bus_write_1(sc->io_res, ICH_D1, word >> 8); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); smb_error = ichsmb_wait(sc); mtx_unlock(&sc->mutex); DBG("smb_error=%d\n", smb_error); return (smb_error); } int ichsmb_readb(device_t dev, u_char slave, char cmd, char *byte) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x cmd=0x%02x\n", slave, (u_char)cmd); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BYTE_DATA; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_READ); bus_write_1(sc->io_res, ICH_HST_CMD, cmd); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) *byte = bus_read_1(sc->io_res, ICH_D0); mtx_unlock(&sc->mutex); DBG("smb_error=%d byte=0x%02x\n", smb_error, (u_char)*byte); return (smb_error); } int ichsmb_readw(device_t dev, u_char slave, char cmd, short *word) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x cmd=0x%02x\n", slave, (u_char)cmd); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_WORD_DATA; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_READ); bus_write_1(sc->io_res, ICH_HST_CMD, cmd); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) { *word = (bus_read_1(sc->io_res, ICH_D0) & 0xff) | (bus_read_1(sc->io_res, ICH_D1) << 8); } mtx_unlock(&sc->mutex); DBG("smb_error=%d word=0x%04x\n", smb_error, (u_int16_t)*word); return (smb_error); } int ichsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x cmd=0x%02x sdata=0x%04x\n", slave, (u_char)cmd, (u_int16_t)sdata); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_PROC_CALL; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_WRITE); bus_write_1(sc->io_res, ICH_HST_CMD, cmd); bus_write_1(sc->io_res, ICH_D0, sdata & 0xff); bus_write_1(sc->io_res, ICH_D1, sdata >> 8); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) { *rdata = (bus_read_1(sc->io_res, ICH_D0) & 0xff) | (bus_read_1(sc->io_res, ICH_D1) << 8); } mtx_unlock(&sc->mutex); DBG("smb_error=%d rdata=0x%04x\n", smb_error, (u_int16_t)*rdata); return (smb_error); } int ichsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x cmd=0x%02x count=%d\n", slave, (u_char)cmd, count); #if ICHSMB_DEBUG #define DISP(ch) (((ch) < 0x20 || (ch) >= 0x7e) ? '.' : (ch)) { u_char *p; for (p = (u_char *)buf; p - (u_char *)buf < 32; p += 8) { DBG("%02x: %02x %02x %02x %02x %02x %02x %02x %02x" " %c%c%c%c%c%c%c%c", (p - (u_char *)buf), p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], DISP(p[0]), DISP(p[1]), DISP(p[2]), DISP(p[3]), DISP(p[4]), DISP(p[5]), DISP(p[6]), DISP(p[7])); } } #undef DISP #endif KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); if (count < 1 || count > 32) return (SMB_EINVAL); bcopy(buf, sc->block_data, count); sc->block_count = count; sc->block_index = 1; sc->block_write = 1; mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BLOCK; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_WRITE); bus_write_1(sc->io_res, ICH_HST_CMD, cmd); bus_write_1(sc->io_res, ICH_D0, count); bus_write_1(sc->io_res, ICH_BLOCK_DB, buf[0]); bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); smb_error = ichsmb_wait(sc); mtx_unlock(&sc->mutex); DBG("smb_error=%d\n", smb_error); return (smb_error); } int ichsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf) { const sc_p sc = device_get_softc(dev); int smb_error; DBG("slave=0x%02x cmd=0x%02x count=%d\n", slave, (u_char)cmd, count); KASSERT(sc->ich_cmd == -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); if (*count < 1 || *count > 32) return (SMB_EINVAL); bzero(sc->block_data, sizeof(sc->block_data)); sc->block_count = 0; sc->block_index = 0; sc->block_write = 0; mtx_lock(&sc->mutex); sc->ich_cmd = ICH_HST_CNT_SMB_CMD_BLOCK; bus_write_1(sc->io_res, ICH_XMIT_SLVA, slave | ICH_XMIT_SLVA_READ); bus_write_1(sc->io_res, ICH_HST_CMD, cmd); bus_write_1(sc->io_res, ICH_D0, *count); /* XXX? */ bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_START | ICH_HST_CNT_INTREN | sc->ich_cmd); if ((smb_error = ichsmb_wait(sc)) == SMB_ENOERR) { bcopy(sc->block_data, buf, min(sc->block_count, *count)); *count = sc->block_count; } mtx_unlock(&sc->mutex); DBG("smb_error=%d\n", smb_error); #if ICHSMB_DEBUG #define DISP(ch) (((ch) < 0x20 || (ch) >= 0x7e) ? '.' : (ch)) { u_char *p; for (p = (u_char *)buf; p - (u_char *)buf < 32; p += 8) { DBG("%02x: %02x %02x %02x %02x %02x %02x %02x %02x" " %c%c%c%c%c%c%c%c", (p - (u_char *)buf), p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], DISP(p[0]), DISP(p[1]), DISP(p[2]), DISP(p[3]), DISP(p[4]), DISP(p[5]), DISP(p[6]), DISP(p[7])); } } #undef DISP #endif return (smb_error); } /******************************************************************** OTHER FUNCTIONS ********************************************************************/ /* * This table describes what interrupts we should ever expect to * see after each ICH command, not including the SMBALERT interrupt. */ static const u_int8_t ichsmb_state_irqs[] = { /* quick */ (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR), /* byte */ (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR), /* byte data */ (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR), /* word data */ (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR), /* process call */ (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR), /* block */ (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR | ICH_HST_STA_BYTE_DONE_STS), /* i2c read (not used) */ (ICH_HST_STA_BUS_ERR | ICH_HST_STA_DEV_ERR | ICH_HST_STA_INTR | ICH_HST_STA_BYTE_DONE_STS) }; /* * Interrupt handler. This handler is bus-independent. Note that our * interrupt may be shared, so we must handle "false" interrupts. */ void ichsmb_device_intr(void *cookie) { const sc_p sc = cookie; const device_t dev = sc->dev; const int maxloops = 16; u_int8_t status; u_int8_t ok_bits; int cmd_index; int count; mtx_lock(&sc->mutex); for (count = 0; count < maxloops; count++) { /* Get and reset status bits */ status = bus_read_1(sc->io_res, ICH_HST_STA); #if ICHSMB_DEBUG if ((status & ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY)) || count > 0) { DBG("%d stat=0x%02x\n", count, status); } #endif status &= ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY); if (status == 0) break; /* Check for unexpected interrupt */ ok_bits = ICH_HST_STA_SMBALERT_STS; cmd_index = sc->ich_cmd >> 2; if (sc->ich_cmd != -1) { KASSERT(cmd_index < sizeof(ichsmb_state_irqs), ("%s: ich_cmd=%d", device_get_nameunit(dev), sc->ich_cmd)); ok_bits |= ichsmb_state_irqs[cmd_index]; } if ((status & ~ok_bits) != 0) { device_printf(dev, "irq 0x%02x during %d\n", status, cmd_index); bus_write_1(sc->io_res, ICH_HST_STA, (status & ~ok_bits)); continue; } /* Handle SMBALERT interrupt */ if (status & ICH_HST_STA_SMBALERT_STS) { static int smbalert_count = 16; if (smbalert_count > 0) { device_printf(dev, "SMBALERT# rec'd\n"); if (--smbalert_count == 0) { device_printf(dev, "not logging anymore\n"); } } } /* Check for bus error */ if (status & ICH_HST_STA_BUS_ERR) { sc->smb_error = SMB_ECOLLI; /* XXX SMB_EBUSERR? */ goto finished; } /* Check for device error */ if (status & ICH_HST_STA_DEV_ERR) { sc->smb_error = SMB_ENOACK; /* or SMB_ETIMEOUT? */ goto finished; } /* Check for byte completion in block transfer */ if (status & ICH_HST_STA_BYTE_DONE_STS) { if (sc->block_write) { if (sc->block_index < sc->block_count) { /* Write next byte */ bus_write_1(sc->io_res, ICH_BLOCK_DB, sc->block_data[sc->block_index++]); } } else { /* First interrupt, get the count also */ if (sc->block_index == 0) { sc->block_count = bus_read_1( sc->io_res, ICH_D0); } /* Get next byte, if any */ if (sc->block_index < sc->block_count) { /* Read next byte */ sc->block_data[sc->block_index++] = bus_read_1(sc->io_res, ICH_BLOCK_DB); /* Set "LAST_BYTE" bit before reading the last byte of block data */ if (sc->block_index >= sc->block_count - 1) { bus_write_1(sc->io_res, ICH_HST_CNT, ICH_HST_CNT_LAST_BYTE | ICH_HST_CNT_INTREN | sc->ich_cmd); } } } } /* Check command completion */ if (status & ICH_HST_STA_INTR) { sc->smb_error = SMB_ENOERR; finished: sc->ich_cmd = -1; bus_write_1(sc->io_res, ICH_HST_STA, status); wakeup(sc); break; } /* Clear status bits and try again */ bus_write_1(sc->io_res, ICH_HST_STA, status); } mtx_unlock(&sc->mutex); /* Too many loops? */ if (count == maxloops) { device_printf(dev, "interrupt loop, status=0x%02x\n", bus_read_1(sc->io_res, ICH_HST_STA)); } } /* * Wait for command completion. Assumes mutex is held. * Returns an SMB_* error code. */ static int ichsmb_wait(sc_p sc) { const device_t dev = sc->dev; int error, smb_error; KASSERT(sc->ich_cmd != -1, ("%s: ich_cmd=%d\n", __func__ , sc->ich_cmd)); mtx_assert(&sc->mutex, MA_OWNED); error = msleep(sc, &sc->mutex, PZERO, "ichsmb", hz / 4); DBG("msleep -> %d\n", error); switch (error) { case 0: smb_error = sc->smb_error; break; case EWOULDBLOCK: device_printf(dev, "device timeout, status=0x%02x\n", bus_read_1(sc->io_res, ICH_HST_STA)); sc->ich_cmd = -1; smb_error = SMB_ETIMEOUT; break; default: smb_error = SMB_EABORT; break; } return (smb_error); } /* * Release resources associated with device. */ void ichsmb_release_resources(sc_p sc) { const device_t dev = sc->dev; if (sc->irq_handle != NULL) { bus_teardown_intr(dev, sc->irq_res, sc->irq_handle); sc->irq_handle = NULL; } if (sc->irq_res != NULL) { bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq_res); sc->irq_res = NULL; } if (sc->io_res != NULL) { bus_release_resource(dev, SYS_RES_IOPORT, sc->io_rid, sc->io_res); sc->io_res = NULL; } } int ichsmb_detach(device_t dev) { const sc_p sc = device_get_softc(dev); int error; error = bus_generic_detach(dev); if (error) return (error); device_delete_child(dev, sc->smb); ichsmb_release_resources(sc); mtx_destroy(&sc->mutex); return 0; } DRIVER_MODULE(smbus, ichsmb, smbus_driver, smbus_devclass, 0, 0);