1 /*-
36 #include <dev/smbus/smbconf.h>
40 #include <dev/pci/pcireg.h>
41 #include <dev/pci/pcivar.h>
42 #include <dev/intpm/intpmreg.h>
43 #include <dev/amdsbwd/amd_chipset.h>
48 	device_t		dev;  member
62 #define	INTSMB_LOCK(sc)		mtx_lock(&(sc)->lock)
63 #define	INTSMB_UNLOCK(sc)	mtx_unlock(&(sc)->lock)
64 #define	INTSMB_LOCK_ASSERT(sc)	mtx_assert(&(sc)->lock, MA_OWNED)
72 static int intsmb_callback(device_t dev, int index, void *data);
73 static int intsmb_quick(device_t dev, u_char slave, int how);
74 static int intsmb_sendb(device_t dev, u_char slave, char byte);
75 static int intsmb_recvb(device_t dev, u_char slave, char *byte);
76 static int intsmb_writeb(device_t dev, u_char slave, char cmd, char byte);
77 static int intsmb_writew(device_t dev, u_char slave, char cmd, short word);
78 static int intsmb_readb(device_t dev, u_char slave, char cmd, char *byte);
79 static int intsmb_readw(device_t dev, u_char slave, char cmd, short *word);
80 static int intsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata);
81 static int intsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf);
82 static int intsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf);
107 intsmb_probe(device_t dev)  in intsmb_probe()  argument
113 	devid = pci_get_devid(dev);  in intsmb_probe()
116 		if (isd->devid == devid) {  in intsmb_probe()
117 			device_set_desc(dev, isd->description);  in intsmb_probe()
132 sb8xx_attach(device_t dev)  in sb8xx_attach()  argument
144 	sc = device_get_softc(dev);  in sb8xx_attach()
145 	devid = pci_get_devid(dev);  in sb8xx_attach()
146 	revid = pci_get_revid(dev);  in sb8xx_attach()
149 	 * Comment from Linux i2c-piix4.c:  in sb8xx_attach()
156 		sc->type = SYS_RES_MEMORY;  in sb8xx_attach()
159 		sc->type = SYS_RES_IOPORT;  in sb8xx_attach()
164 	rc = bus_set_resource(dev, sc->type, rid, addr,  in sb8xx_attach()
167 		device_printf(dev, "bus_set_resource for PM IO failed\n");  in sb8xx_attach()
170 	res = bus_alloc_resource_any(dev, sc->type, &rid,  in sb8xx_attach()
173 		device_printf(dev, "bus_alloc_resource for PM IO failed\n");  in sb8xx_attach()
196 	bus_release_resource(dev, sc->type, rid, res);  in sb8xx_attach()
197 	bus_delete_resource(dev, sc->type, rid);  in sb8xx_attach()
200 		device_printf(dev, "SB8xx/SB9xx/FCH SMBus not enabled\n");  in sb8xx_attach()
204 	sc->io_rid = 0;  in sb8xx_attach()
205 	rc = bus_set_resource(dev, sc->type, sc->io_rid, addr,  in sb8xx_attach()
208 		device_printf(dev, "bus_set_resource for SMBus IO failed\n");  in sb8xx_attach()
211 	sc->io_res = bus_alloc_resource_any(dev, sc->type, &sc->io_rid,  in sb8xx_attach()
213 	if (sc->io_res == NULL) {  in sb8xx_attach()
214 		device_printf(dev, "Could not allocate I/O space\n");  in sb8xx_attach()
217 	sc->poll = 1;  in sb8xx_attach()
222 intsmb_release_resources(device_t dev)  in intsmb_release_resources()  argument
224 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_release_resources()
226 	device_delete_children(dev);  in intsmb_release_resources()
227 	if (sc->irq_hand)  in intsmb_release_resources()
228 		bus_teardown_intr(dev, sc->irq_res, sc->irq_hand);  in intsmb_release_resources()
229 	if (sc->irq_res)  in intsmb_release_resources()
230 		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);  in intsmb_release_resources()
231 	if (sc->io_res)  in intsmb_release_resources()
232 		bus_release_resource(dev, sc->type, sc->io_rid,  in intsmb_release_resources()
233 		    sc->io_res);  in intsmb_release_resources()
234 	mtx_destroy(&sc->lock);  in intsmb_release_resources()
238 intsmb_attach(device_t dev)  in intsmb_attach()  argument
240 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_attach()
245 	sc->dev = dev;  in intsmb_attach()
247 	mtx_init(&sc->lock, device_get_nameunit(dev), "intsmb", MTX_DEF);  in intsmb_attach()
249 	sc->cfg_irq9 = 0;  in intsmb_attach()
250 	sc->type = SYS_RES_IOPORT;  in intsmb_attach()
251 	switch (pci_get_devid(dev)) {  in intsmb_attach()
256 		sc->cfg_irq9 = 1;  in intsmb_attach()
260 		if (pci_get_revid(dev) >= AMDSB8_SMBUS_REVID)  in intsmb_attach()
261 			sc->sb8xx = 1;  in intsmb_attach()
266 		sc->sb8xx = 1;  in intsmb_attach()
270 	if (sc->sb8xx) {  in intsmb_attach()
271 		error = sb8xx_attach(dev);  in intsmb_attach()
278 	sc->io_rid = PCI_BASE_ADDR_SMB;  in intsmb_attach()
279 	sc->io_res = bus_alloc_resource_any(dev, sc->type, &sc->io_rid,  in intsmb_attach()
281 	if (sc->io_res == NULL) {  in intsmb_attach()
282 		device_printf(dev, "Could not allocate I/O space\n");  in intsmb_attach()
287 	if (sc->cfg_irq9) {  in intsmb_attach()
288 		pci_write_config(dev, PCIR_INTLINE, 0x9, 1);  in intsmb_attach()
289 		pci_write_config(dev, PCI_HST_CFG_SMB,  in intsmb_attach()
292 	value = pci_read_config(dev, PCI_HST_CFG_SMB, 1);  in intsmb_attach()
293 	sc->poll = (value & PCI_INTR_SMB_ENABLE) == 0;  in intsmb_attach()
309 	device_printf(dev, "intr %s %s ", str,  in intsmb_attach()
310 	    sc->poll == 0 ? "enabled" : "disabled");  in intsmb_attach()
311 	printf("revision %d\n", pci_read_config(dev, PCI_REVID_SMB, 1));  in intsmb_attach()
313 	if (!sc->poll && intr == PCI_INTR_SMB_SMI) {  in intsmb_attach()
314 		device_printf(dev,  in intsmb_attach()
316 		sc->poll = 1;  in intsmb_attach()
319 	if (sc->poll)  in intsmb_attach()
323 		device_printf(dev, "Unsupported interrupt mode\n");  in intsmb_attach()
330 	if (sc->cfg_irq9)  in intsmb_attach()
331 		bus_set_resource(dev, SYS_RES_IRQ, rid, 9, 1);  in intsmb_attach()
333 	sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,  in intsmb_attach()
335 	if (sc->irq_res == NULL) {  in intsmb_attach()
336 		device_printf(dev, "Could not allocate irq\n");  in intsmb_attach()
341 	error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,  in intsmb_attach()
342 	    NULL, intsmb_rawintr, sc, &sc->irq_hand);  in intsmb_attach()
344 		device_printf(dev, "Failed to map intr\n");  in intsmb_attach()
349 	sc->isbusy = 0;  in intsmb_attach()
350 	sc->smbus = device_add_child(dev, "smbus", DEVICE_UNIT_ANY);  in intsmb_attach()
351 	if (sc->smbus == NULL) {  in intsmb_attach()
352 		device_printf(dev, "failed to add smbus child\n");  in intsmb_attach()
356 	error = device_probe_and_attach(sc->smbus);  in intsmb_attach()
358 		device_printf(dev, "failed to probe+attach smbus child\n");  in intsmb_attach()
364 	bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN);  in intsmb_attach()
369 	intsmb_release_resources(dev);  in intsmb_attach()
374 intsmb_detach(device_t dev)  in intsmb_detach()  argument
378 	error = bus_generic_detach(dev);  in intsmb_detach()
380 		device_printf(dev, "bus detach failed\n");  in intsmb_detach()
384 	intsmb_release_resources(dev);  in intsmb_detach()
400 intsmb_callback(device_t dev, int index, void *data)  in intsmb_callback()  argument
422 	if ((bus_read_1(sc->io_res, PIIX4_SMBHSTSTS) & PIIX4_SMBHSTSTAT_BUSY) ||  in intsmb_free()
424 	    (bus_read_1(sc->io_res, PIIX4_SMBSLVSTS) & PIIX4_SMBSLVSTS_BUSY) ||  in intsmb_free()
426 	    sc->isbusy)  in intsmb_free()
429 	sc->isbusy = 1;  in intsmb_free()
430 	/* Disable Interrupt in slave part. */  in intsmb_free()
432 	bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, 0);  in intsmb_free()
435 	bus_write_1(sc->io_res, PIIX4_SMBHSTSTS,  in intsmb_free()
446 	status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS);  in intsmb_intr()
453 		tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);  in intsmb_intr()
454 		bus_write_1(sc->io_res, PIIX4_SMBHSTCNT,  in intsmb_intr()
456 		if (sc->isbusy) {  in intsmb_intr()
457 			sc->isbusy = 0;  in intsmb_intr()
470 	status = bus_read_1(sc->io_res, PIIX4_SMBSLVSTS);  in intsmb_slvintr()
480 	bus_write_1(sc->io_res, PIIX4_SMBSLVSTS,  in intsmb_slvintr()
496 	slvcnt = bus_read_1(sc->io_res, PIIX4_SMBSLVCNT);  in intsmb_alrintr()
498 	bus_write_1(sc->io_res, PIIX4_SMBSLVCNT,  in intsmb_alrintr()
509 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, SMBALTRESP | LSB);  in intsmb_alrintr()
513 		device_printf(sc->dev, "ALART: ERROR\n");  in intsmb_alrintr()
515 		addr = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);  in intsmb_alrintr()
516 		device_printf(sc->dev, "ALART_RESPONSE: 0x%x\n", addr);  in intsmb_alrintr()
519 	/* Re-enable INTR from ALART. */  in intsmb_alrintr()
520 	bus_write_1(sc->io_res, PIIX4_SMBSLVCNT,  in intsmb_alrintr()
532 	tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);  in intsmb_start()
538 	if (!sc->poll && !cold && !nointr)  in intsmb_start()
540 	bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp);  in intsmb_start()
544 intsmb_error(device_t dev, int status)  in intsmb_error()  argument
550 	 * - SMB_ENOACK ("Unclaimed cycle"),  in intsmb_error()
551 	 * - SMB_ETIMEOUT ("Host device time-out"),  in intsmb_error()
552 	 * - SMB_EINVAL ("Illegal command field").  in intsmb_error()
563 		device_printf(dev, "error = %d, status = %#x\n", error, status);  in intsmb_error()
585 		if (bus_read_1(sc->io_res, PIIX4_SMBHSTSTS) &  in intsmb_stop_poll()
591 		status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS);  in intsmb_stop_poll()
593 			sc->isbusy = 0;  in intsmb_stop_poll()
594 			error = intsmb_error(sc->dev, status);  in intsmb_stop_poll()
600 	sc->isbusy = 0;  in intsmb_stop_poll()
601 	tmp = bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);  in intsmb_stop_poll()
602 	bus_write_1(sc->io_res, PIIX4_SMBHSTCNT, tmp & ~PIIX4_SMBHSTCNT_INTREN);  in intsmb_stop_poll()
616 	if (sc->poll || cold)  in intsmb_stop()
620 	error = msleep(sc, &sc->lock, PWAIT | PCATCH, "SMBWAI", hz / 8);  in intsmb_stop()
622 		status = bus_read_1(sc->io_res, PIIX4_SMBHSTSTS);  in intsmb_stop()
624 			error = intsmb_error(sc->dev, status);  in intsmb_stop()
626 				device_printf(sc->dev, "unknown cause why?\n");  in intsmb_stop()
628 			bus_write_1(sc->io_res, PIIX4_SMBSLVCNT,  in intsmb_stop()
636 	sc->isbusy = 0;  in intsmb_stop()
638 	/* Re-enable suppressed interrupt from slave part. */  in intsmb_stop()
639 	bus_write_1(sc->io_res, PIIX4_SMBSLVCNT, PIIX4_SMBSLVCNT_ALTEN);  in intsmb_stop()
647 intsmb_quick(device_t dev, u_char slave, int how)  in intsmb_quick()  argument
649 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_quick()
653 	data = slave;  in intsmb_quick()
673 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, data);  in intsmb_quick()
681 intsmb_sendb(device_t dev, u_char slave, char byte)  in intsmb_sendb()  argument
683 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_sendb()
692 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB);  in intsmb_sendb()
693 	bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, byte);  in intsmb_sendb()
701 intsmb_recvb(device_t dev, u_char slave, char *byte)  in intsmb_recvb()  argument
703 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_recvb()
712 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB);  in intsmb_recvb()
721 		*byte = bus_read_1(sc->io_res, PIIX4_SMBHSTCMD);  in intsmb_recvb()
723 		*byte = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);  in intsmb_recvb()
731 intsmb_writeb(device_t dev, u_char slave, char cmd, char byte)  in intsmb_writeb()  argument
733 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_writeb()
742 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB);  in intsmb_writeb()
743 	bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);  in intsmb_writeb()
744 	bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, byte);  in intsmb_writeb()
752 intsmb_writew(device_t dev, u_char slave, char cmd, short word)  in intsmb_writew()  argument
754 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_writew()
763 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB);  in intsmb_writew()
764 	bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);  in intsmb_writew()
765 	bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, word & 0xff);  in intsmb_writew()
766 	bus_write_1(sc->io_res, PIIX4_SMBHSTDAT1, (word >> 8) & 0xff);  in intsmb_writew()
774 intsmb_readb(device_t dev, u_char slave, char cmd, char *byte)  in intsmb_readb()  argument
776 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_readb()
785 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB);  in intsmb_readb()
786 	bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);  in intsmb_readb()
790 		*byte = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);  in intsmb_readb()
796 intsmb_readw(device_t dev, u_char slave, char cmd, short *word)  in intsmb_readw()  argument
798 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_readw()
807 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB);  in intsmb_readw()
808 	bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);  in intsmb_readw()
812 		*word = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);  in intsmb_readw()
813 		*word |= bus_read_1(sc->io_res, PIIX4_SMBHSTDAT1) << 8;  in intsmb_readw()
820 intsmb_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata)  in intsmb_pcall()  argument
827 intsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)  in intsmb_bwrite()  argument
829 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_bwrite()
843 	bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);  in intsmb_bwrite()
845 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave & ~LSB);  in intsmb_bwrite()
846 	bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);  in intsmb_bwrite()
848 		bus_write_1(sc->io_res, PIIX4_SMBBLKDAT, buf[i]);  in intsmb_bwrite()
849 	bus_write_1(sc->io_res, PIIX4_SMBHSTDAT0, count);  in intsmb_bwrite()
857 intsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf)  in intsmb_bread()  argument
859 	struct intsmb_softc *sc = device_get_softc(dev);  in intsmb_bread()
871 	bus_read_1(sc->io_res, PIIX4_SMBHSTCNT);  in intsmb_bread()
873 	bus_write_1(sc->io_res, PIIX4_SMBHSTADD, slave | LSB);  in intsmb_bread()
874 	bus_write_1(sc->io_res, PIIX4_SMBHSTCMD, cmd);  in intsmb_bread()
878 		nread = bus_read_1(sc->io_res, PIIX4_SMBHSTDAT0);  in intsmb_bread()
882 				bus_read_1(sc->io_res, PIIX4_SMBBLKDAT);  in intsmb_bread()