/* $OpenBSD: ioc.c,v 1.21 2009/08/18 19:32:47 miod Exp $ */ /* * Copyright (c) 2008 Joel Sing. * Copyright (c) 2008, 2009 Miodrag Vallat. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * IOC3 device driver. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int ioc_match(struct device *, void *, void *); void ioc_attach(struct device *, struct device *, void *); struct device * ioc_attach_child(struct device *, const char *, bus_addr_t, int); int ioc_search_onewire(struct device *, void *, void *); int ioc_search_mundane(struct device *, void *, void *); int ioc_print(void *, const char *); struct ioc_intr { struct ioc_softc *ii_ioc; int (*ii_func)(void *); void *ii_arg; struct evcount ii_count; int ii_level; }; struct ioc_softc { struct device sc_dev; struct mips_bus_space *sc_mem_bus_space; bus_space_tag_t sc_memt; bus_space_handle_t sc_memh; bus_dma_tag_t sc_dmat; pci_chipset_tag_t sc_pc; void *sc_ih1; /* Ethernet interrupt */ void *sc_ih2; /* SuperIO interrupt */ struct ioc_intr *sc_intr[IOC_NDEVS]; struct onewire_bus sc_bus; struct owmac_softc *sc_owmac; struct owserial_softc *sc_owserial; }; struct cfattach ioc_ca = { sizeof(struct ioc_softc), ioc_match, ioc_attach, }; struct cfdriver ioc_cd = { NULL, "ioc", DV_DULL, }; int ioc_intr_dispatch(struct ioc_softc *, int); int ioc_intr_ethernet(void *); int ioc_intr_shared(void *); int ioc_intr_superio(void *); int iocow_reset(void *); int iocow_read_bit(struct ioc_softc *); int iocow_send_bit(void *, int); int iocow_read_byte(void *); int iocow_triplet(void *, int); int iocow_pulse(struct ioc_softc *, int, int); int ioc_match(struct device *parent, void *match, void *aux) { struct pci_attach_args *pa = aux; if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SGI && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SGI_IOC3) return (1); return (0); } int ioc_print(void *aux, const char *iocname) { struct ioc_attach_args *iaa = aux; if (iocname != NULL) printf("%s at %s", iaa->iaa_name, iocname); if ((int)iaa->iaa_base > 0) /* no base for onewire */ printf(" base 0x%x", iaa->iaa_base); return (UNCONF); } void ioc_attach(struct device *parent, struct device *self, void *aux) { struct ioc_softc *sc = (struct ioc_softc *)self; struct pci_attach_args *pa = aux; pci_intr_handle_t ih1, ih2; bus_space_tag_t memt; bus_space_handle_t memh; bus_size_t memsize; uint32_t data; int dev; int dual_irq, shared_handler, has_ethernet, has_ps2, has_serial; struct device *child; if (pci_mapreg_map(pa, PCI_MAPREG_START, PCI_MAPREG_TYPE_MEM, 0, &memt, &memh, NULL, &memsize, 0)) { printf(": can't map mem space\n"); return; } sc->sc_pc = pa->pa_pc; sc->sc_dmat = pa->pa_dmat; /* * Initialise IOC3 ASIC. */ data = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); data |= PCI_COMMAND_MEM_ENABLE | PCI_COMMAND_PARITY_ENABLE | PCI_COMMAND_SERR_ENABLE; data &= ~PCI_COMMAND_INTERRUPT_DISABLE; pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, data); printf("\n"); /* * Build a suitable bus_space_handle by restoring the original * non-swapped subword access methods. * * XXX This is horrible and will need to be rethought if * XXX we ever support ioc3 cards not plugged to xbridges. */ sc->sc_mem_bus_space = malloc(sizeof (*sc->sc_mem_bus_space), M_DEVBUF, M_NOWAIT); if (sc->sc_mem_bus_space == NULL) { printf("%s: can't allocate bus_space\n", self->dv_xname); goto unmap; } bcopy(memt, sc->sc_mem_bus_space, sizeof(*sc->sc_mem_bus_space)); sc->sc_mem_bus_space->_space_read_1 = xbow_read_1; sc->sc_mem_bus_space->_space_read_2 = xbow_read_2; sc->sc_mem_bus_space->_space_read_raw_2 = xbow_read_raw_2; sc->sc_mem_bus_space->_space_write_1 = xbow_write_1; sc->sc_mem_bus_space->_space_write_2 = xbow_write_2; sc->sc_mem_bus_space->_space_write_raw_2 = xbow_write_raw_2; sc->sc_memt = sc->sc_mem_bus_space; sc->sc_memh = memh; /* * Attach the 1-Wire bus now, so that we can get our own part * number and deduce which devices are really available on the * board. */ config_search(ioc_search_onewire, self, aux); /* * Now figure out what our configuration is. */ printf("%s: ", self->dv_xname); dual_irq = shared_handler = 0; has_ethernet = has_ps2 = has_serial = 0; if (sc->sc_owserial != NULL) { if (strncmp(sc->sc_owserial->sc_product, "030-0873-", 9) == 0) { /* MENET board */ has_ethernet = has_serial = 1; shared_handler = 1; } else if (strncmp(sc->sc_owserial->sc_product, "030-0891-", 9) == 0) { /* IP30 on-board IOC3 */ has_ethernet = has_ps2 = has_serial = 1; dual_irq = 1; } else if (strncmp(sc->sc_owserial->sc_product, "030-1155-", 9) == 0) { /* CADDuo board */ has_ps2 = has_ethernet = 1; shared_handler = 1; } else if (strncmp(sc->sc_owserial->sc_product, "030-1657-", 9) == 0 || strncmp(sc->sc_owserial->sc_product, "030-1664-", 9) == 0) { /* PCI_SIO_UFC dual serial board */ has_serial = 1; } else { goto unknown; } } else { /* * If no owserial device has been found, then it is * very likely that we are the on-board IOC3 found * on IP27 and IP35 systems. */ if (sys_config.system_type == SGI_O200 || sys_config.system_type == SGI_O300) { has_ethernet = has_ps2 = has_serial = 1; dual_irq = 1; /* * XXX On IP35 class machines, there are no * XXX Number-In-a-Can chips to tell us the * XXX Ethernet address, we need to query * XXX the L1 controller. */ } else { unknown: /* * Well, we don't really know what kind of device * we are. We should probe various registers * to figure out, but for now we'll just * chicken out. */ printf("unknown flavour\n"); return; } } /* * IOC3 is not a real PCI device - it's a poor wrapper over a set * of convenience chips. And when it is in full-blown configuration, * it actually needs to use two interrupts, one for the superio * chip, and the other for the Ethernet chip. * * Since our pci layer doesn't handle this, we have to compute * the superio interrupt cookie ourselves, with the help of the * pci bridge driver. * * (What the above means is that you should wear peril-sensitive * sunglasses from now on). * * To make things ever worse, some IOC3 boards (real boards, not * on-board components) lack the Ethernet component. We should * eventually handle them there, but it's not worth doing yet... * (and we'll need to parse the ownum serial numbers to know * this anyway) */ if (pci_intr_map(pa, &ih1) != 0) { printf("failed to map interrupt!\n"); goto unmap; } /* * The second vector source seems to be the first unused PCI * slot. */ if (dual_irq) { for (dev = 0; dev < pci_bus_maxdevs(pa->pa_pc, pa->pa_bus); dev++) { pcitag_t tag; int line, rc; if (dev == pa->pa_device) continue; tag = pci_make_tag(pa->pa_pc, pa->pa_bus, dev, 0); if (pci_conf_read(pa->pa_pc, tag, PCI_ID_REG) != 0xffffffff) continue; /* slot in use... */ line = pa->pa_intrline; pa->pa_intrline = dev; rc = pci_intr_map(pa, &ih2); pa->pa_intrline = line; if (rc != 0) { printf(": failed to map superio interrupt!\n"); goto unmap; } goto establish; } /* * There are no empty slots, thus we can't steal an * interrupt. I don't know how IOC3 behaves in this * situation, but it's probably safe to revert to * a shared, single interrupt. */ shared_handler = 1; dual_irq = 0; } if (dual_irq) { establish: /* * Register the second (superio) interrupt. */ sc->sc_ih2 = pci_intr_establish(sc->sc_pc, ih2, IPL_TTY, ioc_intr_superio, sc, self->dv_xname); if (sc->sc_ih2 == NULL) { printf("failed to establish superio interrupt at %s\n", pci_intr_string(sc->sc_pc, ih2)); goto unmap; } printf("superio %s", pci_intr_string(sc->sc_pc, ih2)); } /* * Register the main (Ethernet if available, superio otherwise) * interrupt. */ sc->sc_ih1 = pci_intr_establish(sc->sc_pc, ih1, IPL_NET, shared_handler ? ioc_intr_shared : ioc_intr_ethernet, sc, self->dv_xname); if (sc->sc_ih1 == NULL) { printf("\n%s: failed to establish %sinterrupt!\n", self->dv_xname, dual_irq ? "ethernet " : ""); goto unregister; } printf("%s%s\n", dual_irq ? ", ethernet " : "", pci_intr_string(sc->sc_pc, ih1)); /* * Acknowledge all pending interrupts, and disable them. */ bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IEC, ~0x0); bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IES, 0x0); bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IR, bus_space_read_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IR)); /* * Attach other sub-devices. */ if (has_serial) { ioc_attach_child(self, "com", IOC3_UARTA_BASE, IOCDEV_SERIAL_A); ioc_attach_child(self, "com", IOC3_UARTB_BASE, IOCDEV_SERIAL_B); } if (has_ps2) ioc_attach_child(self, "iockbc", IOC3_KBC_BASE, IOCDEV_KBC); if (has_ethernet) { child = ioc_attach_child(self, "iec", IOC3_EF_BASE, IOCDEV_EF); if (dual_irq != 0 && child == NULL) { /* * If we did not attach an ethernet driver and * this is the dual interrupt design, unhook the * network interrupt, because ARCS might have left * interrupt conditions pending, which will not be * acknowledged at the IOC3 driver level. */ pci_intr_disestablish(sc->sc_pc, sc->sc_ih1); } } /* XXX what about the parallel port? */ ioc_attach_child(self, "dsrtc", 0 /* IOC3_RTC_BASE */, IOCDEV_RTC); return; unregister: if (dual_irq) pci_intr_disestablish(sc->sc_pc, sc->sc_ih2); unmap: bus_space_unmap(memt, memh, memsize); } struct device * ioc_attach_child(struct device *ioc, const char *name, bus_addr_t base, int dev) { struct ioc_softc *sc = (struct ioc_softc *)ioc; struct ioc_attach_args iaa; iaa.iaa_name = name; iaa.iaa_memt = sc->sc_memt; iaa.iaa_memh = sc->sc_memh; iaa.iaa_dmat = sc->sc_dmat; iaa.iaa_base = base; iaa.iaa_dev = dev; if (sc->sc_owmac != NULL) memcpy(iaa.iaa_enaddr, sc->sc_owmac->sc_enaddr, 6); else { /* * XXX On IP35, there is no Number-In-a-Can attached to * XXX the onboard IOC3; instead, the Ethernet address * XXX is stored in the machine eeprom and can be * XXX queried by sending the appropriate L1 command * XXX to the L1 UART. This L1 code is not written yet. */ bzero(iaa.iaa_enaddr, 6); } return config_found_sm(ioc, &iaa, ioc_print, ioc_search_mundane); } int ioc_search_mundane(struct device *parent, void *vcf, void *args) { struct cfdata *cf = vcf; struct ioc_attach_args *iaa = (struct ioc_attach_args *)args; if (strcmp(cf->cf_driver->cd_name, iaa->iaa_name) != 0) return 0; if (cf->cf_loc[0] != -1 && cf->cf_loc[0] != (int)iaa->iaa_base) return 0; return (*cf->cf_attach->ca_match)(parent, cf, iaa); } /* * Number-In-a-Can access driver (1-Wire interface through IOC) */ int ioc_search_onewire(struct device *parent, void *vcf, void *args) { struct ioc_softc *sc = (struct ioc_softc *)parent; struct cfdata *cf = vcf; struct onewirebus_attach_args oba; struct device *owdev, *dev; extern struct cfdriver owmac_cd; extern struct cfdriver owserial_cd; struct owserial_softc *s; if (strcmp(cf->cf_driver->cd_name, "onewire") != 0) return 0; sc->sc_bus.bus_cookie = sc; sc->sc_bus.bus_reset = iocow_reset; sc->sc_bus.bus_bit = iocow_send_bit; sc->sc_bus.bus_read_byte = iocow_read_byte; sc->sc_bus.bus_write_byte = NULL; /* use default routine */ sc->sc_bus.bus_read_block = NULL; /* use default routine */ sc->sc_bus.bus_write_block = NULL; /* use default routine */ sc->sc_bus.bus_triplet = iocow_triplet; sc->sc_bus.bus_matchrom = NULL; /* use default routine */ sc->sc_bus.bus_search = NULL; /* use default routine */ oba.oba_bus = &sc->sc_bus; oba.oba_flags = ONEWIRE_SCAN_NOW | ONEWIRE_NO_PERIODIC_SCAN; /* In case onewire is disabled in UKC... */ if ((*cf->cf_attach->ca_match)(parent, cf, &oba) == 0) return 0; owdev = config_attach(parent, cf, &oba, onewirebus_print); /* * Find the first owmac child of the onewire bus, and keep * a pointer to it. This allows us to pass the ethernet * address to the ethernet subdevice. */ if (owdev != NULL) { TAILQ_FOREACH(dev, &alldevs, dv_list) if (dev->dv_parent == owdev && dev->dv_cfdata->cf_driver == &owmac_cd) { sc->sc_owmac = (struct owmac_softc *)dev; break; } } /* * Find the first owserial child of the onewire bus not * reporting power supply information, and keep a pointer * to it. This is a bit overkill since we do not need to * keep the pointer after attach, but it makes that kind * of code contained in the same place. */ if (owdev != NULL) { TAILQ_FOREACH(dev, &alldevs, dv_list) if (dev->dv_parent == owdev && dev->dv_cfdata->cf_driver == &owserial_cd) { s = (struct owserial_softc *)dev; if (strncmp(s->sc_name, "PWR", 3) == 0) continue; sc->sc_owserial = s; break; } } return 1; } int iocow_reset(void *v) { struct ioc_softc *sc = v; return iocow_pulse(sc, 500, 65); } int iocow_read_bit(struct ioc_softc *sc) { return iocow_pulse(sc, 6, 13); } int iocow_send_bit(void *v, int bit) { struct ioc_softc *sc = v; int rc; if (bit != 0) rc = iocow_pulse(sc, 6, 110); else rc = iocow_pulse(sc, 80, 30); return rc; } int iocow_read_byte(void *v) { struct ioc_softc *sc = v; unsigned int byte = 0; int i; for (i = 0; i < 8; i++) byte |= iocow_read_bit(sc) << i; return byte; } int iocow_triplet(void *v, int dir) { struct ioc_softc *sc = v; int rc; rc = iocow_read_bit(sc); rc <<= 1; rc |= iocow_read_bit(sc); switch (rc) { case 0x0: iocow_send_bit(v, dir); break; case 0x1: iocow_send_bit(v, 0); break; default: iocow_send_bit(v, 1); break; } return (rc); } int iocow_pulse(struct ioc_softc *sc, int pulse, int data) { uint32_t mcr_value; mcr_value = (pulse << 10) | (data << 2); bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_MCR, mcr_value); do { mcr_value = bus_space_read_4(sc->sc_memt, sc->sc_memh, IOC3_MCR); } while ((mcr_value & 0x00000002) == 0); delay(500); return (mcr_value & 1); } /* * Interrupt handling. */ /* * List of interrupt bits to enable for each device. * * For the serial ports, we only enable the passthrough interrupt and * let com(4) tinker with the appropriate registers, instead of adding * an unnecessary layer there. */ static const uint32_t ioc_intrbits[IOC_NDEVS] = { IOC3_IRQ_UARTA, IOC3_IRQ_UARTB, IOC3_IRQ_LPT, IOC3_IRQ_KBC, 0, /* RTC */ 0 /* Ethernet, handled differently */ }; void * ioc_intr_establish(void *cookie, u_long dev, int level, int (*func)(void *), void *arg, char *name) { struct ioc_softc *sc = cookie; struct ioc_intr *ii; if (dev < 0 || dev >= IOC_NDEVS) return NULL; ii = (struct ioc_intr *)malloc(sizeof(*ii), M_DEVBUF, M_NOWAIT); if (ii == NULL) return NULL; ii->ii_ioc = sc; ii->ii_func = func; ii->ii_arg = arg; ii->ii_level = level; evcount_attach(&ii->ii_count, name, &ii->ii_level, &evcount_intr); sc->sc_intr[dev] = ii; /* enable hardware source if necessary */ bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IES, ioc_intrbits[dev]); return (ii); } int ioc_intr_superio(void *v) { struct ioc_softc *sc = (struct ioc_softc *)v; uint32_t pending, mask; int dev; pending = bus_space_read_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IR) & bus_space_read_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IES); if (pending == 0) return 0; /* Disable pending interrupts */ bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IEC, pending); for (dev = 0; dev < IOC_NDEVS - 1 /* skip Ethernet */; dev++) { mask = pending & ioc_intrbits[dev]; if (mask != 0) { (void)ioc_intr_dispatch(sc, dev); /* Ack, then reenable, pending interrupts */ bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IR, mask); bus_space_write_4(sc->sc_memt, sc->sc_memh, IOC3_SIO_IES, mask); } } return 1; } int ioc_intr_ethernet(void *v) { struct ioc_softc *sc = (struct ioc_softc *)v; /* This interrupt source is not shared between several devices. */ return ioc_intr_dispatch(sc, IOCDEV_EF); } int ioc_intr_shared(void *v) { return ioc_intr_superio(v) | ioc_intr_ethernet(v); } int ioc_intr_dispatch(struct ioc_softc *sc, int dev) { struct ioc_intr *ii; int rc = 0; /* Call registered interrupt function. */ if ((ii = sc->sc_intr[dev]) != NULL && ii->ii_func != NULL) { rc = (*ii->ii_func)(ii->ii_arg); if (rc != 0) ii->ii_count.ec_count++; } return rc; }