/* $OpenBSD: piix.c,v 1.11 2015/09/01 06:01:24 deraadt Exp $ */ /* $NetBSD: piix.c,v 1.1 1999/11/17 01:21:20 thorpej Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Copyright (c) 1999, by UCHIYAMA Yasushi * 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. The name of the developer 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 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. */ /* * Support for the Intel PIIX PCI-ISA bridge interrupt controller. */ #include #include #include #include #include #include #include #include #include #include #include #include #ifdef PIIX_DEBUG #define DPRINTF(arg) printf arg #else #define DPRINTF(arg) #endif int piix_getclink(pciintr_icu_handle_t, int, int *); int piix_get_intr(pciintr_icu_handle_t, int, int *); int piix_set_intr(pciintr_icu_handle_t, int, int); #ifdef PIIX_DEBUG void piix_pir_dump(struct piix_handle *); #endif const struct pciintr_icu piix_pci_icu = { piix_getclink, piix_get_intr, piix_set_intr, piix_get_trigger, piix_set_trigger, }; int piix_init(pci_chipset_tag_t pc, bus_space_tag_t iot, pcitag_t tag, pciintr_icu_tag_t *ptagp, pciintr_icu_handle_t *phandp) { struct piix_handle *ph; ph = malloc(sizeof(*ph), M_DEVBUF, M_NOWAIT); if (ph == NULL) return (1); ph->ph_iot = iot; ph->ph_pc = pc; ph->ph_tag = tag; if (bus_space_map(iot, PIIX_REG_ELCR, PIIX_REG_ELCR_SIZE, 0, &ph->ph_elcr_ioh) != 0) { free(ph, M_DEVBUF, sizeof *ph); return (1); } #ifdef PIIX_DEBUG piix_pir_dump(ph); #endif *ptagp = &piix_pci_icu; *phandp = ph; return (0); } int piix_getclink(pciintr_icu_handle_t v, int link, int *clinkp) { DPRINTF(("PIIX link value 0x%x: ", link)); /* Pattern 1: simple. */ if (PIIX_LEGAL_LINK(link - 1)) { *clinkp = link - 1; DPRINTF(("PIRQ %d (simple)\n", *clinkp)); return (0); } /* Pattern 2: configuration register offset */ if (link >= 0x60 && link <= 0x63) { *clinkp = link - 0x60; DPRINTF(("PIRQ %d (register offset)\n", *clinkp)); return (0); } /* Pattern 3: configuration register offset, PIRQE# - PIRQH# */ if (link >= 0x68 && link <= 0x6b) { *clinkp = link - 0x64; DPRINTF(("PIRQ %d (high register offset)\n", *clinkp)); return (0); } DPRINTF(("bogus IRQ selection source\n")); return (1); } int piix_get_intr(pciintr_icu_handle_t v, int clink, int *irqp) { struct piix_handle *ph = v; int shift, off; pcireg_t reg; if (PIIX_LEGAL_LINK(clink) == 0) return (1); off = PIIX_CFG_PIRQ; if (clink > 3) { off += 8; clink -= 4; } reg = pci_conf_read(ph->ph_pc, ph->ph_tag, off); shift = clink << 3; if ((reg >> shift) & PIIX_CFG_PIRQ_NONE) *irqp = I386_PCI_INTERRUPT_LINE_NO_CONNECTION; else *irqp = PIIX_PIRQ(reg, clink); return (0); } int piix_set_intr(pciintr_icu_handle_t v, int clink, int irq) { struct piix_handle *ph = v; int shift, off; pcireg_t reg; if (PIIX_LEGAL_LINK(clink) == 0 || PIIX_LEGAL_IRQ(irq) == 0) return (1); off = PIIX_CFG_PIRQ; if (clink > 3) { off += 8; clink -= 4; } reg = pci_conf_read(ph->ph_pc, ph->ph_tag, off); shift = clink << 3; reg &= ~((PIIX_CFG_PIRQ_NONE | PIIX_CFG_PIRQ_MASK) << shift); reg |= irq << shift; pci_conf_write(ph->ph_pc, ph->ph_tag, off, reg); return (0); } int piix_get_trigger(pciintr_icu_handle_t v, int irq, int *triggerp) { struct piix_handle *ph = v; int off, bit; u_int8_t elcr; if (PIIX_LEGAL_IRQ(irq) == 0) return (1); off = (irq > 7) ? 1 : 0; bit = irq & 7; elcr = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, off); if (elcr & (1 << bit)) *triggerp = IST_LEVEL; else *triggerp = IST_EDGE; return (0); } int piix_set_trigger(pciintr_icu_handle_t v, int irq, int trigger) { struct piix_handle *ph = v; int off, bit; u_int8_t elcr; if (PIIX_LEGAL_IRQ(irq) == 0) return (1); off = (irq > 7) ? 1 : 0; bit = irq & 7; elcr = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, off); if (trigger == IST_LEVEL) elcr |= (1 << bit); else elcr &= ~(1 << bit); bus_space_write_1(ph->ph_iot, ph->ph_elcr_ioh, off, elcr); return (0); } #ifdef PIIX_DEBUG void piix_pir_dump(struct piix_handle *ph) { int i, irq; pcireg_t irqs = pci_conf_read(ph->ph_pc, ph->ph_tag, PIIX_CFG_PIRQ); u_int8_t elcr[2]; elcr[0] = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, 0); elcr[1] = bus_space_read_1(ph->ph_iot, ph->ph_elcr_ioh, 1); for (i = 0; i < 8; i++) { if (i == 4) irqs = pci_conf_read(ph->ph_pc, ph->ph_tag, PIIX_CFG_PIRQH); irq = PIIX_PIRQ(irqs, i); if (irq & PIIX_CFG_PIRQ_NONE) printf("PIIX PIRQ %d: irq none (0x%x)\n", i, irq); else printf("PIIX PIRQ %d: irq %d\n", i, irq); } printf("PIIX irq:"); for (i = 0; i < 16; i++) printf(" %2d", i); printf("\n"); printf(" trigger:"); for (i = 0; i < 16; i++) printf(" %c", (elcr[(i & 8) ? 1 : 0] & (1 << (i & 7))) ? 'L' : 'E'); printf("\n"); } #endif /* PIIX_DEBUG */