298 lines
8.4 KiB
C
298 lines
8.4 KiB
C
/*-
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* Copyright (C) 2012 Margarida Gouveia
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/cpu.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/platform.h>
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#include <machine/pmap.h>
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#include <machine/resource.h>
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#include <powerpc/wii/wii_picreg.h>
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#include <powerpc/wii/wii_fbreg.h>
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#include <powerpc/wii/wii_exireg.h>
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#include <powerpc/wii/wii_ipcreg.h>
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#include <powerpc/wii/wii_gpioreg.h>
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static void wiibus_identify(driver_t *, device_t);
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static int wiibus_probe(device_t);
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static int wiibus_attach(device_t);
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static int wiibus_print_child(device_t, device_t);
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static struct resource *
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wiibus_alloc_resource(device_t, device_t, int, int *,
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unsigned long, unsigned long, unsigned long,
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unsigned int);
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static int wiibus_activate_resource(device_t, device_t, int, int,
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struct resource *);
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static device_method_t wiibus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, wiibus_identify),
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DEVMETHOD(device_probe, wiibus_probe),
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DEVMETHOD(device_attach, wiibus_attach),
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/* Bus interface */
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DEVMETHOD(bus_add_child, bus_generic_add_child),
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DEVMETHOD(bus_print_child, wiibus_print_child),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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DEVMETHOD(bus_alloc_resource, wiibus_alloc_resource),
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DEVMETHOD(bus_activate_resource,wiibus_activate_resource),
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DEVMETHOD_END
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};
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struct wiibus_softc {
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device_t sc_dev;
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struct rman sc_rman;
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};
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static MALLOC_DEFINE(M_WIIBUS, "wiibus", "Nintendo Wii system bus");
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struct wiibus_devinfo {
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struct resource_list di_resources;
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uint8_t di_init;
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};
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static driver_t wiibus_driver = {
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"wiibus",
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wiibus_methods,
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sizeof(struct wiibus_softc)
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};
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static devclass_t wiibus_devclass;
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DRIVER_MODULE(wiibus, nexus, wiibus_driver, wiibus_devclass, 0, 0);
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static void
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wiibus_identify(driver_t *driver, device_t parent)
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{
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if (strcmp(installed_platform(), "wii") != 0)
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return;
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if (device_find_child(parent, "wiibus", -1) == NULL)
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BUS_ADD_CHILD(parent, 0, "wiibus", 0);
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}
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static int
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wiibus_probe(device_t dev)
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{
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device_set_desc(dev, "Nintendo Wii System Bus");
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return (BUS_PROBE_NOWILDCARD);
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}
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static void
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wiibus_init_device_resources(struct rman *rm, struct wiibus_devinfo *dinfo,
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unsigned int rid, uintptr_t addr, size_t len, unsigned int irq)
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{
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if (!dinfo->di_init) {
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resource_list_init(&dinfo->di_resources);
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dinfo->di_init++;
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}
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if (addr) {
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rman_manage_region(rm, addr, addr + len - 1);
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resource_list_add(&dinfo->di_resources, SYS_RES_MEMORY, rid,
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addr, addr + len, len);
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}
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if (irq)
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resource_list_add(&dinfo->di_resources, SYS_RES_IRQ, rid,
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irq, irq, 1);
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}
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static int
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wiibus_attach(device_t self)
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{
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struct wiibus_softc *sc;
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struct wiibus_devinfo *dinfo;
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device_t cdev;
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sc = device_get_softc(self);
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sc->sc_rman.rm_type = RMAN_ARRAY;
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sc->sc_rman.rm_descr = "Wii Bus Memory Mapped I/O";
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rman_init(&sc->sc_rman);
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/* Nintendo PIC */
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dinfo = malloc(sizeof(*dinfo), M_WIIBUS, M_WAITOK | M_ZERO);
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wiibus_init_device_resources(&sc->sc_rman, dinfo, 0, WIIPIC_REG_ADDR,
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WIIPIC_REG_LEN, 0);
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cdev = BUS_ADD_CHILD(self, 0, "wiipic", 0);
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device_set_ivars(cdev, dinfo);
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/* Framebuffer */
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dinfo = malloc(sizeof(*dinfo), M_WIIBUS, M_WAITOK | M_ZERO);
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wiibus_init_device_resources(&sc->sc_rman, dinfo, 0, WIIFB_REG_ADDR,
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WIIFB_REG_LEN, 8);
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wiibus_init_device_resources(&sc->sc_rman, dinfo, 1, WIIFB_FB_ADDR,
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WIIFB_FB_LEN, 0);
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cdev = BUS_ADD_CHILD(self, 0, "wiifb", 0);
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device_set_ivars(cdev, dinfo);
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/* External Interface Bus */
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dinfo = malloc(sizeof(*dinfo), M_WIIBUS, M_WAITOK | M_ZERO);
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wiibus_init_device_resources(&sc->sc_rman, dinfo, 0, WIIEXI_REG_ADDR,
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WIIEXI_REG_LEN, 4);
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cdev = BUS_ADD_CHILD(self, 0, "wiiexi", 0);
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device_set_ivars(cdev, dinfo);
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/* Nintendo IOS IPC */
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dinfo = malloc(sizeof(*dinfo), M_WIIBUS, M_WAITOK | M_ZERO);
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wiibus_init_device_resources(&sc->sc_rman, dinfo, 0, WIIIPC_REG_ADDR,
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WIIIPC_REG_LEN, 14);
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wiibus_init_device_resources(&sc->sc_rman, dinfo, 1, WIIIPC_IOH_ADDR,
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WIIIPC_IOH_LEN, 0);
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cdev = BUS_ADD_CHILD(self, 0, "wiiipc", 0);
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device_set_ivars(cdev, dinfo);
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/* GPIO */
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dinfo = malloc(sizeof(*dinfo), M_WIIBUS, M_WAITOK | M_ZERO);
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wiibus_init_device_resources(&sc->sc_rman, dinfo, 0, WIIGPIO_REG_ADDR,
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WIIGPIO_REG_LEN, 0);
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cdev = BUS_ADD_CHILD(self, 0, "wiigpio", 0);
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device_set_ivars(cdev, dinfo);
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return (bus_generic_attach(self));
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}
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static int
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wiibus_print_child(device_t dev, device_t child)
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{
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struct wiibus_devinfo *dinfo = device_get_ivars(child);
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int retval = 0;
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retval += bus_print_child_header(dev, child);
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retval += resource_list_print_type(&dinfo->di_resources, "mem",
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SYS_RES_MEMORY, "%#lx");
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retval += resource_list_print_type(&dinfo->di_resources, "irq",
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SYS_RES_IRQ, "%ld");
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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static struct resource *
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wiibus_alloc_resource(device_t bus, device_t child, int type,
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int *rid, unsigned long start, unsigned long end,
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unsigned long count, unsigned int flags)
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{
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struct wiibus_softc *sc;
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struct wiibus_devinfo *dinfo;
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struct resource_list_entry *rle;
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struct resource *rv;
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int needactivate;
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sc = device_get_softc(bus);
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dinfo = device_get_ivars(child);
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needactivate = flags & RF_ACTIVE;
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flags &= ~RF_ACTIVE;
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switch (type) {
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case SYS_RES_MEMORY:
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rle = resource_list_find(&dinfo->di_resources, SYS_RES_MEMORY,
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*rid);
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if (rle == NULL) {
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device_printf(bus, "no res entry for %s memory 0x%x\n",
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device_get_nameunit(child), *rid);
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return (NULL);
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}
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rv = rman_reserve_resource(&sc->sc_rman, rle->start, rle->end,
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rle->count, flags, child);
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if (rv == NULL) {
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device_printf(bus,
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"failed to reserve resource for %s\n",
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device_get_nameunit(child));
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return (NULL);
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}
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rman_set_rid(rv, *rid);
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break;
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case SYS_RES_IRQ:
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return (resource_list_alloc(&dinfo->di_resources, bus, child,
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type, rid, start, end, count, flags));
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default:
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device_printf(bus, "unknown resource request from %s\n",
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device_get_nameunit(child));
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return (NULL);
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}
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if (needactivate) {
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if (bus_activate_resource(child, type, *rid, rv) != 0) {
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device_printf(bus,
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"failed to activate resource for %s\n",
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device_get_nameunit(child));
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return (NULL);
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}
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}
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return (rv);
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}
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static int
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wiibus_activate_resource(device_t bus, device_t child, int type, int rid,
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struct resource *res)
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{
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void *p;
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switch (type) {
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case SYS_RES_MEMORY:
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p = pmap_mapdev(rman_get_start(res), rman_get_size(res));
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if (p == NULL)
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return (ENOMEM);
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rman_set_virtual(res, p);
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rman_set_bustag(res, &bs_be_tag);
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rman_set_bushandle(res, (unsigned long)p);
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break;
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case SYS_RES_IRQ:
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return (bus_activate_resource(bus, type, rid, res));
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default:
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device_printf(bus,
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"unknown activate resource request from %s\n",
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device_get_nameunit(child));
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return (ENXIO);
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}
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return (rman_activate_resource(res));
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}
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