/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright 2002 by Peter Grehan. 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. 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. * * $FreeBSD$ */ /* * PSIM 'iobus' local bus. Should be set up in the device tree like: * * /iobus@0x80000000/name psim-iobus * * Code borrowed from various nexus.c and uninorth.c :-) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct iobus_softc { phandle_t sc_node; vm_offset_t sc_addr; vm_offset_t sc_size; struct rman sc_mem_rman; }; static MALLOC_DEFINE(M_IOBUS, "iobus", "iobus device information"); static int iobus_probe(device_t); static int iobus_attach(device_t); static int iobus_print_child(device_t dev, device_t child); static void iobus_probe_nomatch(device_t, device_t); static int iobus_read_ivar(device_t, device_t, int, uintptr_t *); static int iobus_write_ivar(device_t, device_t, int, uintptr_t); static struct resource *iobus_alloc_resource(device_t, device_t, int, int *, rman_res_t, rman_res_t, rman_res_t, u_int); static int iobus_activate_resource(device_t, device_t, int, int, struct resource *); static int iobus_deactivate_resource(device_t, device_t, int, int, struct resource *); static int iobus_release_resource(device_t, device_t, int, int, struct resource *); /* * Bus interface definition */ static device_method_t iobus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, iobus_probe), DEVMETHOD(device_attach, iobus_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* Bus interface */ DEVMETHOD(bus_print_child, iobus_print_child), DEVMETHOD(bus_probe_nomatch, iobus_probe_nomatch), DEVMETHOD(bus_read_ivar, iobus_read_ivar), DEVMETHOD(bus_write_ivar, iobus_write_ivar), DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), DEVMETHOD(bus_alloc_resource, iobus_alloc_resource), DEVMETHOD(bus_release_resource, iobus_release_resource), DEVMETHOD(bus_activate_resource, iobus_activate_resource), DEVMETHOD(bus_deactivate_resource, iobus_deactivate_resource), { 0, 0 } }; static driver_t iobus_driver = { "iobus", iobus_methods, sizeof(struct iobus_softc) }; DRIVER_MODULE(iobus, ofwbus, iobus_driver, 0, 0); static int iobus_probe(device_t dev) { const char *type = ofw_bus_get_name(dev); if (strcmp(type, "psim-iobus") != 0) return (ENXIO); device_set_desc(dev, "PSIM local bus"); return (0); } /* * Add interrupt/addr range to the dev's resource list if present */ static void iobus_add_intr(phandle_t devnode, struct iobus_devinfo *dinfo) { u_int intr = -1; if (OF_getprop(devnode, "interrupt", &intr, sizeof(intr)) != -1) { resource_list_add(&dinfo->id_resources, SYS_RES_IRQ, 0, intr, intr, 1); } dinfo->id_interrupt = intr; } static void iobus_add_reg(phandle_t devnode, struct iobus_devinfo *dinfo, vm_offset_t iobus_off) { u_int size; int i; size = OF_getprop(devnode, "reg", dinfo->id_reg,sizeof(dinfo->id_reg)); if (size != -1) { dinfo->id_nregs = size / (sizeof(dinfo->id_reg[0])); for (i = 0; i < dinfo->id_nregs; i+= 3) { /* * Scale the absolute addresses back to iobus * relative offsets. This is to better simulate * macio */ dinfo->id_reg[i+1] -= iobus_off; resource_list_add(&dinfo->id_resources, SYS_RES_MEMORY, 0, dinfo->id_reg[i+1], dinfo->id_reg[i+1] + dinfo->id_reg[i+2], dinfo->id_reg[i+2]); } } } static int iobus_attach(device_t dev) { struct iobus_softc *sc; struct iobus_devinfo *dinfo; phandle_t root; phandle_t child; device_t cdev; char *name; u_int reg[2]; int size; sc = device_get_softc(dev); sc->sc_node = ofw_bus_get_node(dev); /* * Find the base addr/size of the iobus, and initialize the * resource manager */ size = OF_getprop(sc->sc_node, "reg", reg, sizeof(reg)); if (size == sizeof(reg)) { sc->sc_addr = reg[0]; sc->sc_size = reg[1]; } else { return (ENXIO); } sc->sc_mem_rman.rm_type = RMAN_ARRAY; sc->sc_mem_rman.rm_descr = "IOBus Device Memory"; if (rman_init(&sc->sc_mem_rman) != 0) { device_printf(dev, "failed to init mem range resources\n"); return (ENXIO); } rman_manage_region(&sc->sc_mem_rman, 0, sc->sc_size); /* * Iterate through the sub-devices */ root = sc->sc_node; for (child = OF_child(root); child != 0; child = OF_peer(child)) { OF_getprop_alloc(child, "name", (void **)&name); cdev = device_add_child(dev, NULL, -1); if (cdev != NULL) { dinfo = malloc(sizeof(*dinfo), M_IOBUS, M_WAITOK); memset(dinfo, 0, sizeof(*dinfo)); resource_list_init(&dinfo->id_resources); dinfo->id_node = child; dinfo->id_name = name; iobus_add_intr(child, dinfo); iobus_add_reg(child, dinfo, sc->sc_addr); device_set_ivars(cdev, dinfo); } else { OF_prop_free(name); } } return (bus_generic_attach(dev)); } static int iobus_print_child(device_t dev, device_t child) { struct iobus_devinfo *dinfo; struct resource_list *rl; int retval = 0; dinfo = device_get_ivars(child); rl = &dinfo->id_resources; retval += bus_print_child_header(dev, child); retval += printf(" offset 0x%x", dinfo->id_reg[1]); retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); retval += bus_print_child_footer(dev, child); return (retval); } static void iobus_probe_nomatch(device_t dev, device_t child) { } static int iobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) { struct iobus_devinfo *dinfo; if ((dinfo = device_get_ivars(child)) == NULL) return (ENOENT); switch (which) { case IOBUS_IVAR_NODE: *result = dinfo->id_node; break; case IOBUS_IVAR_NAME: *result = (uintptr_t)dinfo->id_name; break; case IOBUS_IVAR_NREGS: *result = dinfo->id_nregs; break; case IOBUS_IVAR_REGS: *result = (uintptr_t)dinfo->id_reg; break; default: return (ENOENT); } return (0); } static int iobus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) { return (EINVAL); } static struct resource * iobus_alloc_resource(device_t bus, device_t child, int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) { struct iobus_softc *sc; int needactivate; struct resource *rv; struct rman *rm; sc = device_get_softc(bus); needactivate = flags & RF_ACTIVE; flags &= ~RF_ACTIVE; switch (type) { case SYS_RES_MEMORY: case SYS_RES_IOPORT: rm = &sc->sc_mem_rman; break; case SYS_RES_IRQ: return (bus_alloc_resource(bus, type, rid, start, end, count, flags)); default: device_printf(bus, "unknown resource request from %s\n", device_get_nameunit(child)); return (NULL); } rv = rman_reserve_resource(rm, start, end, count, flags, child); if (rv == NULL) { device_printf(bus, "failed to reserve resource for %s\n", device_get_nameunit(child)); return (NULL); } rman_set_rid(rv, *rid); if (needactivate) { if (bus_activate_resource(child, type, *rid, rv) != 0) { device_printf(bus, "failed to activate resource for %s\n", device_get_nameunit(child)); rman_release_resource(rv); return (NULL); } } return (rv); } static int iobus_release_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { if (rman_get_flags(res) & RF_ACTIVE) { int error = bus_deactivate_resource(child, type, rid, res); if (error) return error; } return (rman_release_resource(res)); } static int iobus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { struct iobus_softc *sc; void *p; sc = device_get_softc(bus); if (type == SYS_RES_IRQ) return (bus_activate_resource(bus, type, rid, res)); if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { p = pmap_mapdev((vm_paddr_t)rman_get_start(res) + sc->sc_addr, (vm_size_t)rman_get_size(res)); if (p == NULL) return (ENOMEM); rman_set_virtual(res, p); rman_set_bustag(res, &bs_le_tag); rman_set_bushandle(res, (u_long)p); } return (rman_activate_resource(res)); } static int iobus_deactivate_resource(device_t bus, device_t child, int type, int rid, struct resource *res) { /* * If this is a memory resource, unmap it. */ if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { u_int32_t psize; psize = rman_get_size(res); pmap_unmapdev(rman_get_virtual(res), psize); } return (rman_deactivate_resource(res)); }