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155 lines
4.3 KiB
C
155 lines
4.3 KiB
C
/*-
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* Copyright (c) 2007 Bruce M. Simpson.
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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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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Child driver for ChipCommon core.
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* This is not MI code at the moment.
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* Two 16C550 compatible UARTs live here. On the WGT634U, uart1 is the
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* system console, and uart0 is not pinned out.
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* Because their presence is conditional, they should probably
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* be attached from here.
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* GPIO lives here.
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* The hardware watchdog lives here.
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* Clock control registers live here.
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* You don't need to read them to determine the clock speed on the 5365,
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* which is always 200MHz and thus may be hardcoded (for now).
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* Flash config registers live here. There may or may not be system flash.
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* The external interface bus lives here (conditionally).
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* There is a JTAG interface here which may be used to attach probes to
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* the SoC for debugging.
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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/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <dev/siba/siba_ids.h>
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#include <dev/siba/sibareg.h>
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#include <dev/siba/sibavar.h>
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static int siba_cc_attach(device_t);
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static int siba_cc_probe(device_t);
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static void siba_cc_intr(void *v);
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static int
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siba_cc_probe(device_t dev)
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{
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if (siba_get_vendor(dev) == SIBA_VID_BROADCOM &&
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siba_get_device(dev) == SIBA_DEVID_CHIPCOMMON) {
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device_set_desc(dev, "ChipCommon core");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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struct siba_cc_softc {
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void *notused;
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};
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static int
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siba_cc_attach(device_t dev)
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{
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//struct siba_cc_softc *sc = device_get_softc(dev);
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struct resource *mem;
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struct resource *irq;
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int rid;
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/*
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* Allocate the resources which the parent bus has already
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* determined for us.
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* TODO: interrupt routing
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*/
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#define MIPS_MEM_RID 0x20
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rid = MIPS_MEM_RID;
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mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (mem == NULL) {
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device_printf(dev, "unable to allocate memory\n");
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return (ENXIO);
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}
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rid = 0;
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irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 0);
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if (irq == NULL) {
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device_printf(dev, "unable to allocate irq\n");
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return (ENXIO);
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}
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/* now setup the interrupt */
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/* may be fast, exclusive or mpsafe at a later date */
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/*
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* XXX is this interrupt line in ChipCommon used for anything
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* other than the uart? in that case we shouldn't hog it ourselves
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* and let uart claim it to avoid polled mode.
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*/
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int err;
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void *cookie;
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err = bus_setup_intr(dev, irq, INTR_TYPE_TTY, NULL, siba_cc_intr, NULL,
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&cookie);
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if (err != 0) {
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device_printf(dev, "unable to setup intr\n");
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return (ENXIO);
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}
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/* TODO: attach uart child */
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return (0);
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}
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static void
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siba_cc_intr(void *v)
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{
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}
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static device_method_t siba_cc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_attach, siba_cc_attach),
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DEVMETHOD(device_probe, siba_cc_probe),
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{0, 0},
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};
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static driver_t siba_cc_driver = {
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"siba_cc",
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siba_cc_methods,
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sizeof(struct siba_softc),
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};
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static devclass_t siba_cc_devclass;
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DRIVER_MODULE(siba_cc, siba, siba_cc_driver, siba_cc_devclass, 0, 0);
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