/* $NetBSD: gapspci_pci.c,v 1.17 2015/10/23 08:40:08 knakahara Exp $ */ /*- * Copyright (c) 2001 Marcus Comstedt. * Copyright (c) 2001 Jason R. Thorpe. * 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 Marcus Comstedt. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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. */ /* * PCI configuraiton space implementation for the SEGA GAPS PCI bridge. */ #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: gapspci_pci.c,v 1.17 2015/10/23 08:40:08 knakahara Exp $"); #include #include #include #include #include #include #include #include #include #include void gaps_attach_hook(device_t, device_t, struct pcibus_attach_args *); int gaps_bus_maxdevs(void *, int); pcitag_t gaps_make_tag(void *, int, int, int); void gaps_decompose_tag(void *, pcitag_t, int *, int *, int *); pcireg_t gaps_conf_read(void *, pcitag_t, int); void gaps_conf_write(void *, pcitag_t, int, pcireg_t); int gaps_intr_map(const struct pci_attach_args *, pci_intr_handle_t *); const char *gaps_intr_string(void *, pci_intr_handle_t, char *buf, size_t len); void *gaps_intr_establish(void *, pci_intr_handle_t, int, int (*)(void *), void *); void gaps_intr_disestablish(void *, void *); void gaps_pci_init(struct gaps_softc *sc) { pci_chipset_tag_t pc = &sc->sc_pc; memset(pc, 0, sizeof(*pc)); pc->pc_attach_hook = gaps_attach_hook; pc->pc_bus_maxdevs = gaps_bus_maxdevs; pc->pc_make_tag = gaps_make_tag; pc->pc_decompose_tag = gaps_decompose_tag; pc->pc_conf_read = gaps_conf_read; pc->pc_conf_write = gaps_conf_write; pc->pc_conf_v = sc; pc->pc_intr_map = gaps_intr_map; pc->pc_intr_string = gaps_intr_string; pc->pc_intr_establish = gaps_intr_establish; pc->pc_intr_disestablish = gaps_intr_disestablish; if (bus_space_map(sc->sc_memt, 0x01001600, 0x100, 0, &sc->sc_pci_memh) != 0) panic("gaps_pci_init: can't map PCI configuration space"); } #define GAPS_PCITAG_MAGIC 0x022473 void gaps_attach_hook(device_t parent, device_t pci, struct pcibus_attach_args *pba) { struct gaps_softc *sc = device_private(parent); /* * Now that we know there's a bus configured, go ahead and * program the BAR on the device. */ pci_conf_write(&sc->sc_pc, GAPS_PCITAG_MAGIC, PCI_MAPREG_START + 4, 0x01000000); pci_conf_write(&sc->sc_pc, GAPS_PCITAG_MAGIC, PCI_COMMAND_STATUS_REG, pci_conf_read(&sc->sc_pc, 0, PCI_COMMAND_STATUS_REG) | PCI_COMMAND_MEM_ENABLE | PCI_COMMAND_MASTER_ENABLE); } int gaps_bus_maxdevs(void *v, int bus) { return 1; } pcitag_t gaps_make_tag(void *v, int bus, int dev, int func) { if (bus == 0 && dev == 0 && func == 0) return GAPS_PCITAG_MAGIC; return 0; } void gaps_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) { int b, d, f; if (tag == GAPS_PCITAG_MAGIC) b = d = f = 0; else { /* * Invalid for GAPS. These values ensure that a valid * tag cannot be built. */ b = 0xff; d = 0x1f; f = 0x7; } if (bp != NULL) *bp = b; if (dp != NULL) *dp = d; if (fp != NULL) *fp = f; } pcireg_t gaps_conf_read(void *v, pcitag_t tag, int reg) { struct gaps_softc *sc = v; if (tag != GAPS_PCITAG_MAGIC) return -1; if ((unsigned int)reg >= PCI_CONF_SIZE) return -1; if (reg == (PCI_MAPREG_START + 4)) { /* * We fake the BAR -- just return the physical address * to which the device is mapped. */ return 0x01001700; } return bus_space_read_4(sc->sc_memt, sc->sc_pci_memh, reg); } void gaps_conf_write(void *v, pcitag_t tag, int reg, pcireg_t val) { struct gaps_softc *sc = v; if (tag != GAPS_PCITAG_MAGIC) return; if ((unsigned int)reg >= PCI_CONF_SIZE) return; /* Disallow writing to the "BAR" ... it doesn't actually exist. */ if (reg == (PCI_MAPREG_START + 4) && val != 0x01000000) return; bus_space_write_4(sc->sc_memt, sc->sc_pci_memh, reg, val); } int gaps_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) { *ihp = SYSASIC_EVENT_EXT; return 0; } const char * gaps_intr_string(void *v, pci_intr_handle_t ih, char *buf, size_t len) { strlcpy(buf, sysasic_intr_string(SYSASIC_IRL11), len); return buf; } void * gaps_intr_establish(void *v, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg) { return sysasic_intr_establish(ih, level, SYSASIC_IRL11, func, arg); } void gaps_intr_disestablish(void *v, void *ih) { return sysasic_intr_disestablish(ih); }