/*- * Copyright (c) 1998, 1999 Takanori Watanabe * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON 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 ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include "smbus_if.h" #include #include #include #include "opt_intpm.h" struct intsmb_softc { device_t dev; struct resource *io_res; struct resource *irq_res; void *irq_hand; device_t smbus; int isbusy; int cfg_irq9; int poll; struct mtx lock; }; #define INTSMB_LOCK(sc) mtx_lock(&(sc)->lock) #define INTSMB_UNLOCK(sc) mtx_unlock(&(sc)->lock) #define INTSMB_LOCK_ASSERT(sc) mtx_assert(&(sc)->lock, MA_OWNED) static int intsmb_probe(device_t); static int intsmb_attach(device_t); static int intsmb_detach(device_t); static int intsmb_intr(struct intsmb_softc *sc); static int intsmb_slvintr(struct intsmb_softc *sc); static void intsmb_alrintr(struct intsmb_softc *sc); static int intsmb_callback(device_t dev, int index, void *data); static int intsmb_quick(device_t dev, u_char slave, int how); static int intsmb_sendb(device_t dev, u_char slave, char byte); static int intsmb_recvb(device_t dev, u_char slave, char *byte); static int intsmb_writeb(device_t dev, u_char slave, char cmd, char byte); static int intsmb_writew(device_t dev, u_char slave, char cmd, short word); static int intsmb_readb(device_t dev, u_char slave, char cmd, char *byte); static int intsmb_readw(device_t dev, u_char slave, char cmd, short *word); static int intsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata); static int intsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf); static int intsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf); static void intsmb_start(struct intsmb_softc *sc, u_char cmd, int nointr); static int intsmb_stop(struct intsmb_softc *sc); static int intsmb_stop_poll(struct intsmb_softc *sc); static int intsmb_free(struct intsmb_softc *sc); static void intsmb_rawintr(void *arg); static int intsmb_probe(device_t dev) { switch (pci_get_devid(dev)) { case 0x71138086: /* Intel 82371AB */ case 0x719b8086: /* Intel 82443MX */ #if 0 /* Not a good idea yet, this stops isab0 functioning */ case 0x02001166: /* ServerWorks OSB4 */ #endif device_set_desc(dev, "Intel PIIX4 SMBUS Interface"); break; case 0x43721002: device_set_desc(dev, "ATI IXP400 SMBus Controller"); break; case 0x43851002: /* SB800 and newer can not be configured in a compatible way. */ if (pci_get_revid(dev) >= 0x40) return (ENXIO); device_set_desc(dev, "AMD SB600/700/710/750 SMBus Controller"); /* XXX Maybe force polling right here? */ break; default: return (ENXIO); } return (BUS_PROBE_DEFAULT); } static int intsmb_attach(device_t dev) { struct intsmb_softc *sc = device_get_softc(dev); int error, rid, value; int intr; char *str; sc->dev = dev; mtx_init(&sc->lock, device_get_nameunit(dev), "intsmb", MTX_DEF); sc->cfg_irq9 = 0; #ifndef NO_CHANGE_PCICONF switch (pci_get_devid(dev)) { case 0x71138086: /* Intel 82371AB */ case 0x719b8086: /* Intel 82443MX */ /* Changing configuration is allowed. */ sc->cfg_irq9 = 1; break; } #endif rid = PCI_BASE_ADDR_SMB; sc->io_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE); if (sc->io_res == NULL) { device_printf(dev, "Could not allocate I/O space\n"); error = ENXIO; goto fail; } if (sc->cfg_irq9) { pci_write_config(dev, PCIR_INTLINE, 0x9, 1); pci_write_config(dev, PCI_HST_CFG_SMB, PCI_INTR_SMB_IRQ9 | PCI_INTR_SMB_ENABLE, 1); } value = pci_read_config(dev, PCI_HST_CFG_SMB, 1); sc->poll = (value & PCI_INTR_SMB_ENABLE) == 0; intr = value & PCI_INTR_SMB_MASK; switch (intr) { case PCI_INTR_SMB_SMI: str = "SMI"; break; case PCI_INTR_SMB_IRQ9: str = "IRQ 9"; break; case PCI_INTR_SMB_IRQ_PCI: str = "PCI IRQ"; break; default: str = "BOGUS"; } device_printf(dev, "intr %s %s ", str, sc->poll == 0 ? "enabled" : "disabled"); printf("revision %d\n", pci_read_config(dev, PCI_REVID_SMB, 1)); if (!sc->poll && intr == PCI_INTR_SMB_SMI) { device_printf(dev, "using polling mode when configured interrupt is SMI\n"); sc->poll = 1; } if (sc->poll) goto no_intr; if (intr != PCI_INTR_SMB_IRQ9 && intr != PCI_INTR_SMB_IRQ_PCI) { device_printf(dev, "Unsupported interrupt mode\n"); error = ENXIO; goto fail; } /* Force IRQ 9. */ rid = 0; if (sc->cfg_irq9) bus_set_resource(dev, SYS_RES_IRQ, rid, 9, 1); sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE); if (sc->irq_res == NULL) { device_printf(dev, "Could not allocate irq\n"); error = ENXIO; goto fail; } error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, NULL, intsmb_rawintr, sc, &sc->irq_hand); if (error) { device_printf(dev, "Failed to map intr\n"); goto fail; } no_intr: sc->isbusy = 0; sc->smbus = device_add_child(dev, "smbus", -1); if (sc->smbus == NULL) { error = ENXIO; goto fail; } error = device_probe_and_attach(sc->smbus); if (error) goto fail; #ifdef ENABLE_ALART /* Enable Arart */ bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN); #endif return (0); fail: intsmb_detach(dev); return (error); } static int intsmb_detach(device_t dev) { struct intsmb_softc *sc = device_get_softc(dev); int error; error = bus_generic_detach(dev); if (error) return (error); if (sc->smbus) device_delete_child(dev, sc->smbus); if (sc->irq_hand) bus_teardown_intr(dev, sc->irq_res, sc->irq_hand); if (sc->irq_res) bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); if (sc->io_res) bus_release_resource(dev, SYS_RES_IOPORT, PCI_BASE_ADDR_SMB, sc->io_res); mtx_destroy(&sc->lock); return (0); } static void intsmb_rawintr(void *arg) { struct intsmb_softc *sc = arg; INTSMB_LOCK(sc); intsmb_intr(sc); intsmb_slvintr(sc); INTSMB_UNLOCK(sc); } static int intsmb_callback(device_t dev, int index, void *data) { int error = 0; switch (index) { case SMB_REQUEST_BUS: break; case SMB_RELEASE_BUS: break; default: error = SMB_EINVAL; } return (error); } /* Counterpart of smbtx_smb_free(). */ static int intsmb_free(struct intsmb_softc *sc) { INTSMB_LOCK_ASSERT(sc); if ((bus_read_1(sc->io_res, PIIX4_SMBHSTSTS) & PIIX4_SMBHSTSTAT_BUSY) || #ifdef ENABLE_ALART (bus_read_1(sc->io_res, PIIX4_SMBSLVSTS) & PIIX4_SMBSLVSTS_BUSY) || #endif sc->isbusy) return (SMB_EBUSY); sc->isbusy = 1; /* Disable Interrupt in slave part. */ #ifndef ENABLE_ALART bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, 0); #endif /* Reset INTR Flag to prepare INTR. */ bus_write_1(sc->io_res, PIIX4_SMBHSTSTS, PIIX4_SMBHSTSTAT_INTR | PIIX4_SMBHSTSTAT_ERR | PIIX4_SMBHSTSTAT_BUSC | PIIX4_SMBHSTSTAT_FAIL); return (0); } static int intsmb_intr(struct intsmb_softc *sc) { int status, tmp; status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS); if (status & PIIX4_SMBHSTSTAT_BUSY) return (1); if (status & (PIIX4_SMBHSTSTAT_INTR | PIIX4_SMBHSTSTAT_ERR | PIIX4_SMBHSTSTAT_BUSC | PIIX4_SMBHSTSTAT_FAIL)) { tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT); bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp & ~PIIX4_SMBHSTCNT_INTREN); if (sc->isbusy) { sc->isbusy = 0; wakeup(sc); } return (0); } return (1); /* Not Completed */ } static int intsmb_slvintr(struct intsmb_softc *sc) { int status; status = bus_read_1(sc->io_res, PIIX4_SMBSLVSTS); if (status & PIIX4_SMBSLVSTS_BUSY) return (1); if (status & PIIX4_SMBSLVSTS_ALART) intsmb_alrintr(sc); else if (status & ~(PIIX4_SMBSLVSTS_ALART | PIIX4_SMBSLVSTS_SDW2 | PIIX4_SMBSLVSTS_SDW1)) { } /* Reset Status Register */ bus_write_1(sc->io_res, PIIX4_SMBSLVSTS, PIIX4_SMBSLVSTS_ALART | PIIX4_SMBSLVSTS_SDW2 | PIIX4_SMBSLVSTS_SDW1 | PIIX4_SMBSLVSTS_SLV); return (0); } static void intsmb_alrintr(struct intsmb_softc *sc) { int slvcnt; #ifdef ENABLE_ALART int error; uint8_t addr; #endif /* Stop generating INTR from ALART. */ slvcnt = bus_read_1(sc->io_res, PIIX4_SMBSLVCNT); #ifdef ENABLE_ALART bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, slvcnt & ~PIIX4_SMBSLVCNT_ALTEN); #endif DELAY(5); /* Ask bus who asserted it and then ask it what's the matter. */ #ifdef ENABLE_ALART error = intsmb_free(sc); if (error) return; bus_write_1(sc->io_res, PIIX4_SMBHSTADD, SMBALTRESP | LSB); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BYTE, 1); error = intsmb_stop_poll(sc); if (error) device_printf(sc->dev, "ALART: ERROR\n"); else { addr = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0); device_printf(sc->dev, "ALART_RESPONSE: 0x%x\n", addr); } /* Re-enable INTR from ALART. */ bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, slvcnt | PIIX4_SMBSLVCNT_ALTEN); DELAY(5); #endif } static void intsmb_start(struct intsmb_softc *sc, unsigned char cmd, int nointr) { unsigned char tmp; INTSMB_LOCK_ASSERT(sc); tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT); tmp &= 0xe0; tmp |= cmd; tmp |= PIIX4_SMBHSTCNT_START; /* While not in autoconfiguration enable interrupts. */ if (!sc->poll && !cold && !nointr) tmp |= PIIX4_SMBHSTCNT_INTREN; bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp); } static int intsmb_error(device_t dev, int status) { int error = 0; if (status & PIIX4_SMBHSTSTAT_ERR) error |= SMB_EBUSERR; if (status & PIIX4_SMBHSTSTAT_BUSC) error |= SMB_ECOLLI; if (status & PIIX4_SMBHSTSTAT_FAIL) error |= SMB_ENOACK; if (error != 0 && bootverbose) device_printf(dev, "error = %d, status = %#x\n", error, status); return (error); } /* * Polling Code. * * Polling is not encouraged because it requires waiting for the * device if it is busy. * (29063505.pdf from Intel) But during boot, interrupt cannot be used, so use * polling code then. */ static int intsmb_stop_poll(struct intsmb_softc *sc) { int error, i, status, tmp; INTSMB_LOCK_ASSERT(sc); /* First, wait for busy to be set. */ for (i = 0; i < 0x7fff; i++) if (bus_read_1(sc->io_res, PIIX4_SMBHSTSTS) & PIIX4_SMBHSTSTAT_BUSY) break; /* Wait for busy to clear. */ for (i = 0; i < 0x7fff; i++) { status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS); if (!(status & PIIX4_SMBHSTSTAT_BUSY)) { sc->isbusy = 0; error = intsmb_error(sc->dev, status); return (error); } } /* Timed out waiting for busy to clear. */ sc->isbusy = 0; tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT); bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp & ~PIIX4_SMBHSTCNT_INTREN); return (SMB_ETIMEOUT); } /* * Wait for completion and return result. */ static int intsmb_stop(struct intsmb_softc *sc) { int error, status; INTSMB_LOCK_ASSERT(sc); if (sc->poll || cold) /* So that it can use device during device probe on SMBus. */ return (intsmb_stop_poll(sc)); error = msleep(sc, &sc->lock, PWAIT | PCATCH, "SMBWAI", hz / 8); if (error == 0) { status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS); if (!(status & PIIX4_SMBHSTSTAT_BUSY)) { error = intsmb_error(sc->dev, status); if (error == 0 && !(status & PIIX4_SMBHSTSTAT_INTR)) device_printf(sc->dev, "unknown cause why?\n"); #ifdef ENABLE_ALART bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN); #endif return (error); } } /* Timeout Procedure. */ sc->isbusy = 0; /* Re-enable supressed interrupt from slave part. */ bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN); if (error == EWOULDBLOCK) return (SMB_ETIMEOUT); else return (SMB_EABORT); } static int intsmb_quick(device_t dev, u_char slave, int how) { struct intsmb_softc *sc = device_get_softc(dev); int error; u_char data; data = slave; /* Quick command is part of Address, I think. */ switch(how) { case SMB_QWRITE: data &= ~LSB; break; case SMB_QREAD: data |= LSB; break; default: return (SMB_EINVAL); } INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, data); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_QUICK, 0); error = intsmb_stop(sc); INTSMB_UNLOCK(sc); return (error); } static int intsmb_sendb(device_t dev, u_char slave, char byte) { struct intsmb_softc *sc = device_get_softc(dev); int error; INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, byte); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BYTE, 0); error = intsmb_stop(sc); INTSMB_UNLOCK(sc); return (error); } static int intsmb_recvb(device_t dev, u_char slave, char *byte) { struct intsmb_softc *sc = device_get_softc(dev); int error; INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BYTE, 0); error = intsmb_stop(sc); if (error == 0) { #ifdef RECV_IS_IN_CMD /* * Linux SMBus stuff also troubles * Because Intel's datasheet does not make clear. */ *byte = bus_read_1(sc->io_res, PIIX4_SMBHSTCMD); #else *byte = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0); #endif } INTSMB_UNLOCK(sc); return (error); } static int intsmb_writeb(device_t dev, u_char slave, char cmd, char byte) { struct intsmb_softc *sc = device_get_softc(dev); int error; INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd); bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, byte); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BDATA, 0); error = intsmb_stop(sc); INTSMB_UNLOCK(sc); return (error); } static int intsmb_writew(device_t dev, u_char slave, char cmd, short word) { struct intsmb_softc *sc = device_get_softc(dev); int error; INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd); bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, word & 0xff); bus_write_1(sc->io_res, PIIX4_SMBHSTDAT1, (word >> 8) & 0xff); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_WDATA, 0); error = intsmb_stop(sc); INTSMB_UNLOCK(sc); return (error); } static int intsmb_readb(device_t dev, u_char slave, char cmd, char *byte) { struct intsmb_softc *sc = device_get_softc(dev); int error; INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BDATA, 0); error = intsmb_stop(sc); if (error == 0) *byte = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0); INTSMB_UNLOCK(sc); return (error); } static int intsmb_readw(device_t dev, u_char slave, char cmd, short *word) { struct intsmb_softc *sc = device_get_softc(dev); int error; INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_WDATA, 0); error = intsmb_stop(sc); if (error == 0) { *word = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0); *word |= bus_read_1(sc->io_res, PIIX4_SMBHSTDAT1) << 8; } INTSMB_UNLOCK(sc); return (error); } /* * Data sheet claims that it implements all function, but also claims * that it implements 7 function and not mention PCALL. So I don't know * whether it will work. */ static int intsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata) { #ifdef PROCCALL_TEST struct intsmb_softc *sc = device_get_softc(dev); int error; INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd); bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, sdata & 0xff); bus_write_1(sc->io_res, PIIX4_SMBHSTDAT1, (sdata & 0xff) >> 8); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_WDATA, 0); error = intsmb_stop(sc); if (error == 0) { *rdata = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0); *rdata |= bus_read_1(sc->io_res, PIIX4_SMBHSTDAT1) << 8; } INTSMB_UNLOCK(sc); return (error); #else return (SMB_ENOTSUPP); #endif } static int intsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf) { struct intsmb_softc *sc = device_get_softc(dev); int error, i; if (count > SMBBLOCKTRANS_MAX || count == 0) return (SMB_EINVAL); INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } /* Reset internal array index. */ bus_read_1(sc->io_res, PIIX4_SMBHSTCNT); bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd); for (i = 0; i < count; i++) bus_write_1(sc->io_res, PIIX4_SMBBLKDAT, buf[i]); bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, count); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BLOCK, 0); error = intsmb_stop(sc); INTSMB_UNLOCK(sc); return (error); } static int intsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf) { struct intsmb_softc *sc = device_get_softc(dev); int error, i; u_char data, nread; if (*count > SMBBLOCKTRANS_MAX || *count == 0) return (SMB_EINVAL); INTSMB_LOCK(sc); error = intsmb_free(sc); if (error) { INTSMB_UNLOCK(sc); return (error); } /* Reset internal array index. */ bus_read_1(sc->io_res, PIIX4_SMBHSTCNT); bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB); bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd); bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, *count); intsmb_start(sc, PIIX4_SMBHSTCNT_PROT_BLOCK, 0); error = intsmb_stop(sc); if (error == 0) { nread = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0); if (nread != 0 && nread <= SMBBLOCKTRANS_MAX) { for (i = 0; i < nread; i++) { data = bus_read_1(sc->io_res, PIIX4_SMBBLKDAT); if (i < *count) buf[i] = data; } *count = nread; } else error = SMB_EBUSERR; } INTSMB_UNLOCK(sc); return (error); } static devclass_t intsmb_devclass; static device_method_t intsmb_methods[] = { /* Device interface */ DEVMETHOD(device_probe, intsmb_probe), DEVMETHOD(device_attach, intsmb_attach), DEVMETHOD(device_detach, intsmb_detach), /* SMBus interface */ DEVMETHOD(smbus_callback, intsmb_callback), DEVMETHOD(smbus_quick, intsmb_quick), DEVMETHOD(smbus_sendb, intsmb_sendb), DEVMETHOD(smbus_recvb, intsmb_recvb), DEVMETHOD(smbus_writeb, intsmb_writeb), DEVMETHOD(smbus_writew, intsmb_writew), DEVMETHOD(smbus_readb, intsmb_readb), DEVMETHOD(smbus_readw, intsmb_readw), DEVMETHOD(smbus_pcall, intsmb_pcall), DEVMETHOD(smbus_bwrite, intsmb_bwrite), DEVMETHOD(smbus_bread, intsmb_bread), DEVMETHOD_END }; static driver_t intsmb_driver = { "intsmb", intsmb_methods, sizeof(struct intsmb_softc), }; DRIVER_MODULE(intsmb, pci, intsmb_driver, intsmb_devclass, 0, 0); DRIVER_MODULE(smbus, intsmb, smbus_driver, smbus_devclass, 0, 0); MODULE_DEPEND(intsmb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER); MODULE_VERSION(intsmb, 1);