/* $NetBSD: i82365_isasubr.c,v 1.48 2012/10/27 17:18:24 chs Exp $ */ /* * Copyright (c) 2000 Christian E. Hopps. All rights reserved. * Copyright (c) 1998 Bill Sommerfeld. All rights reserved. * Copyright (c) 1997 Marc Horowitz. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Marc Horowitz. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 __KERNEL_RCSID(0, "$NetBSD: i82365_isasubr.c,v 1.48 2012/10/27 17:18:24 chs Exp $"); #define PCICISADEBUG #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /***************************************************************************** * Configurable parameters. *****************************************************************************/ #include "opt_pcic_isa_alloc_iobase.h" #include "opt_pcic_isa_alloc_iosize.h" #include "opt_pcic_isa_intr_alloc_mask.h" /* * Default I/O allocation range. If both are set to non-zero, these * values will be used instead. Otherwise, the code attempts to probe * the bus width. Systems with 10 address bits should use 0x300 and 0xff. * Systems with 12 address bits (most) should use 0x400 and 0xbff. */ #ifndef PCIC_ISA_ALLOC_IOBASE #define PCIC_ISA_ALLOC_IOBASE 0 #endif #ifndef PCIC_ISA_ALLOC_IOSIZE #define PCIC_ISA_ALLOC_IOSIZE 0 #endif int pcic_isa_alloc_iobase = PCIC_ISA_ALLOC_IOBASE; int pcic_isa_alloc_iosize = PCIC_ISA_ALLOC_IOSIZE; /* * Default IRQ allocation bitmask. This defines the range of allowable * IRQs for PCMCIA slots. Useful if order of probing would screw up other * devices, or if PCIC hardware/cards have trouble with certain interrupt * lines. */ #ifndef PCIC_ISA_INTR_ALLOC_MASK #define PCIC_ISA_INTR_ALLOC_MASK 0xffff #endif int pcic_isa_intr_alloc_mask = PCIC_ISA_INTR_ALLOC_MASK; #ifndef PCIC_IRQ_PROBE #ifdef hpcmips /* * The irq probing doesn't work with current vrisab implementation. * The irq is just an key to find matching GPIO port to use and is fixed. */ #define PCIC_IRQ_PROBE 0 #else #define PCIC_IRQ_PROBE 1 #endif #endif int pcic_irq_probe = PCIC_IRQ_PROBE; /***************************************************************************** * End of configurable parameters. *****************************************************************************/ #ifdef PCICISADEBUG int pcicsubr_debug = 0; #define DPRINTF(arg) do { if (pcicsubr_debug) printf arg ; } while (0) #else #define DPRINTF(arg) #endif /* * count the interrupt if we have a status set * just use socket 0 */ void pcic_isa_probe_interrupts(struct pcic_isa_softc *, struct pcic_handle *); static int pcic_isa_count_intr(void *); static int pcic_isa_count_intr(void *arg) { struct pcic_softc *sc; struct pcic_isa_softc *isc; struct pcic_handle *h; int cscreg; h = arg; isc = device_private(h->ph_parent); sc = &isc->sc_pcic; cscreg = pcic_read(h, PCIC_CSC); if (cscreg & PCIC_CSC_CD) { if ((++sc->intr_detect % 20) == 0) printf("."); else DPRINTF((".")); return 1; } /* * make sure we don't get stuck in a loop due to * unhandled level interrupts */ if (++sc->intr_false > 40) { pcic_write(h, PCIC_CSC_INTR, 0); delay(10); } #ifdef PCICISADEBUG if (cscreg) DPRINTF(("o")); else DPRINTF(("X")); #endif return cscreg ? 1 : 0; } /* * use soft interrupt card detect to find out which irqs are available * for this controller */ void pcic_isa_probe_interrupts(struct pcic_isa_softc *isc, struct pcic_handle *h) { struct pcic_softc *sc = &isc->sc_pcic; isa_chipset_tag_t ic; int i, j, mask, irq; int cd, cscintr, intr, csc; ic = isc->sc_ic; printf("%s: controller %d detecting irqs with mask 0x%04x:", device_xname(sc->dev), h->chip, sc->intr_mask[h->chip]); DPRINTF(("\n")); /* clear any current interrupt */ pcic_read(h, PCIC_CSC); /* first disable the status irq, card detect is enabled later */ pcic_write(h, PCIC_CSC_INTR, 0); /* steer the interrupt to isa and disable ring and interrupt */ intr = pcic_read(h, PCIC_INTR); DPRINTF(("pcic: old intr 0x%x\n", intr)); intr &= ~(PCIC_INTR_RI_ENABLE | PCIC_INTR_ENABLE | PCIC_INTR_IRQ_MASK); pcic_write(h, PCIC_INTR, intr); /* clear any current interrupt */ pcic_read(h, PCIC_CSC); cd = pcic_read(h, PCIC_CARD_DETECT); cd |= PCIC_CARD_DETECT_SW_INTR; mask = 0; for (i = 0; i < 16; i++) { /* honor configured limitations */ if ((sc->intr_mask[h->chip] & (1 << i)) == 0) continue; DPRINTF(("probing irq %d: ", i)); /* ask for a pulse interrupt so we don't share */ if (isa_intr_alloc(ic, (1 << i), IST_PULSE, &irq)) { DPRINTF(("currently allocated\n")); continue; } cscintr = PCIC_CSC_INTR_CD_ENABLE; cscintr |= (irq << PCIC_CSC_INTR_IRQ_SHIFT); pcic_write(h, PCIC_CSC_INTR, cscintr); delay(10); /* Clear any pending interrupt. */ (void) pcic_read(h, PCIC_CSC); if ((sc->ih = isa_intr_establish(ic, irq, IST_EDGE, IPL_TTY, pcic_isa_count_intr, h)) == NULL) panic("cant get interrupt"); /* interrupt 40 times */ sc->intr_detect = 0; for (j = 0; j < 40 && sc->ih; j++) { sc->intr_false = 0; pcic_write(h, PCIC_CARD_DETECT, cd); delay(100); csc = pcic_read(h, PCIC_CSC); DPRINTF(("%s", csc ? "-" : "")); } DPRINTF((" total %d\n", sc->intr_detect)); /* allow for misses */ if (sc->intr_detect > 37 && sc->intr_detect <= 40) { printf("%d", i); DPRINTF((" succeded\n")); mask |= (1 << i); } if (sc->ih != NULL) { isa_intr_disestablish(ic, sc->ih); sc->ih = NULL; pcic_write(h, PCIC_CSC_INTR, 0); delay(10); } } sc->intr_mask[h->chip] = mask; printf("%s\n", sc->intr_mask[h->chip] ? "" : " none"); } /* * called with interrupts enabled, light up the irqs to find out * which irq lines are actually hooked up to our pcic */ void pcic_isa_config_interrupts(device_t self) { struct pcic_softc *sc; struct pcic_isa_softc *isc; struct pcic_handle *h; isa_chipset_tag_t ic; int s, i, chipmask, chipuniq; isc = device_private(self); sc = &isc->sc_pcic; ic = isc->sc_ic; /* probe each controller */ chipmask = 0xffff; for (i = 0; i < PCIC_NSLOTS; i += 2) { if (sc->handle[i].flags & PCIC_FLAG_SOCKETP) h = &sc->handle[i]; else if (sc->handle[i + 1].flags & PCIC_FLAG_SOCKETP) h = &sc->handle[i + 1]; else continue; sc->intr_mask[h->chip] = PCIC_INTR_IRQ_VALIDMASK & pcic_isa_intr_alloc_mask; /* the cirrus chips lack support for the soft interrupt */ if (pcic_irq_probe != 0 && h->vendor != PCIC_VENDOR_CIRRUS_PD67XX) pcic_isa_probe_interrupts(isc, h); chipmask &= sc->intr_mask[h->chip]; } /* now see if there is at least one irq per chip not shared by all */ chipuniq = 1; for (i = 0; i < PCIC_NSLOTS; i += 2) { if ((sc->handle[i].flags & PCIC_FLAG_SOCKETP) == 0 && (sc->handle[i + 1].flags & PCIC_FLAG_SOCKETP) == 0) continue; if ((sc->intr_mask[i / 2] & ~chipmask) == 0) { chipuniq = 0; break; } } /* * the rest of the following code used to run at config time with * no interrupts and gets unhappy if this is violated so... */ s = splhigh(); /* * allocate our irq. it will be used by both controllers. I could * use two different interrupts, but interrupts are relatively * scarce, shareable, and for PCIC controllers, very infrequent. */ if ((device_cfdata(self)->cf_flags & 1) == 0) { if (sc->irq != ISA_UNKNOWN_IRQ) { if ((chipmask & (1 << sc->irq)) == 0) printf("%s: warning: configured irq %d not " "detected as available\n", device_xname(self), sc->irq); } else if (chipmask == 0 || isa_intr_alloc(ic, chipmask, IST_EDGE, &sc->irq)) { aprint_error_dev(self, "no available irq; "); sc->irq = ISA_UNKNOWN_IRQ; } else if ((chipmask & ~(1 << sc->irq)) == 0 && chipuniq == 0) { aprint_error_dev(self, "can't share irq with cards; "); sc->irq = ISA_UNKNOWN_IRQ; } } else { printf("%s: ", device_xname(self)); sc->irq = ISA_UNKNOWN_IRQ; } if (sc->irq != ISA_UNKNOWN_IRQ) { sc->ih = isa_intr_establish(ic, sc->irq, IST_EDGE, IPL_TTY, pcic_intr, sc); if (sc->ih == NULL) { aprint_error_dev(self, "can't establish interrupt"); sc->irq = ISA_UNKNOWN_IRQ; } } if (sc->irq == ISA_UNKNOWN_IRQ) printf("polling for socket events\n"); else printf("%s: using irq %d for socket events\n", device_xname(self), sc->irq); pcic_attach_sockets_finish(sc); splx(s); } /* * XXX This routine does not deal with the aliasing issue that its * trying to. * * Any isa device may be decoding only 10 bits of address including * the pcic. This routine only detects if the pcic is doing 10 bits. * * What should be done is detect the pcic's idea of the bus width, * and then within those limits allocate a sparse map, where the * each sub region is offset by 0x400. */ void pcic_isa_bus_width_probe(struct pcic_softc *sc, bus_space_tag_t iot, bus_space_handle_t ioh, bus_addr_t base, uint32_t length) { bus_space_handle_t ioh_high; int i, iobuswidth, tmp1, tmp2; /* * figure out how wide the isa bus is. Do this by checking if the * pcic controller is mirrored 0x400 above where we expect it to be. */ iobuswidth = 12; /* Map i/o space. */ if (bus_space_map(iot, base + 0x400, length, 0, &ioh_high)) { aprint_error_dev(sc->dev, "can't map high i/o space\n"); return; } for (i = 0; i < PCIC_NSLOTS; i++) { if (sc->handle[i].flags & PCIC_FLAG_SOCKETP) { /* * read the ident flags from the normal space and * from the mirror, and compare them */ bus_space_write_1(iot, ioh, PCIC_REG_INDEX, sc->handle[i].sock + PCIC_IDENT); tmp1 = bus_space_read_1(iot, ioh, PCIC_REG_DATA); bus_space_write_1(iot, ioh_high, PCIC_REG_INDEX, sc->handle[i].sock + PCIC_IDENT); tmp2 = bus_space_read_1(iot, ioh_high, PCIC_REG_DATA); if (tmp1 == tmp2) iobuswidth = 10; } } bus_space_free(iot, ioh_high, length); /* * XXX some hardware doesn't seem to grok addresses in 0x400 range-- * apparently missing a bit or more of address lines. (e.g. * CIRRUS_PD672X with Linksys EthernetCard ne2000 clone in TI * TravelMate 5000--not clear which is at fault) * * Add a kludge to detect 10 bit wide buses and deal with them, * and also a config file option to override the probe. */ if (iobuswidth == 10) { sc->iobase = 0x300; sc->iosize = 0x0ff; } else { sc->iobase = 0x400; sc->iosize = 0xbff; } DPRINTF(("%s: bus_space_alloc range 0x%04lx-0x%04lx (probed)\n", device_xname(sc->dev), (long) sc->iobase, (long)(sc->iobase + sc->iosize))); if (pcic_isa_alloc_iobase && pcic_isa_alloc_iosize) { sc->iobase = pcic_isa_alloc_iobase; sc->iosize = pcic_isa_alloc_iosize; DPRINTF(("%s: bus_space_alloc range 0x%04lx-0x%04lx " "(config override)\n", device_xname(sc->dev), (long) sc->iobase, (long)(sc->iobase + sc->iosize))); } } void * pcic_isa_chip_intr_establish(pcmcia_chipset_handle_t pch, struct pcmcia_function *pf, int ipl, int (*fct)(void *), void *arg) { struct pcic_handle *h = (struct pcic_handle *) pch; struct pcic_isa_softc *isc = device_private(h->ph_parent); struct pcic_softc *sc = &isc->sc_pcic; isa_chipset_tag_t ic = isc->sc_ic; int irq, ist; void *ih; int reg; /* * PLEASE NOTE: * The IRQLEVEL bit has no bearing on what happens on the host side of * the PCMCIA controller. ISA interrupts are defined to be edge- * triggered, and as this attachment is for ISA devices, the interrupt * *must* be configured for edge-trigger. If you think you should * change this to use IST_LEVEL, you are *wrong*. You should figure * out what your real problem is and leave this code alone rather than * breaking everyone else's systems. - mycroft */ if (pf->cfe->flags & PCMCIA_CFE_IRQLEVEL) ist = IST_EDGE; /* SEE COMMENT ABOVE */ else if (pf->cfe->flags & PCMCIA_CFE_IRQPULSE) ist = IST_PULSE; /* SEE COMMENT ABOVE */ else ist = IST_EDGE; /* SEE COMMENT ABOVE */ if (isa_intr_alloc(ic, sc->intr_mask[h->chip], ist, &irq)) return NULL; h->ih_irq = irq; if (h->flags & PCIC_FLAG_ENABLED) { reg = pcic_read(h, PCIC_INTR); reg &= ~PCIC_INTR_IRQ_MASK; pcic_write(h, PCIC_INTR, reg | irq); } if ((ih = isa_intr_establish(ic, irq, ist, ipl, fct, arg)) == NULL) return NULL; printf("%s: card irq %d\n", device_xname(h->pcmcia), irq); return ih; } void pcic_isa_chip_intr_disestablish(pcmcia_chipset_handle_t pch, void *ih) { struct pcic_handle *h = (struct pcic_handle *) pch; struct pcic_isa_softc *isc = device_private(h->ph_parent); isa_chipset_tag_t ic = isc->sc_ic; int reg; isa_intr_disestablish(ic, ih); h->ih_irq = 0; if (h->flags & PCIC_FLAG_ENABLED) { reg = pcic_read(h, PCIC_INTR); reg &= ~PCIC_INTR_IRQ_MASK; pcic_write(h, PCIC_INTR, reg); } }