71e3c3083b
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
406 lines
11 KiB
C
406 lines
11 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright 2008 by Nathan Whitehorn. 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 ``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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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* $FreeBSD$
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*/
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/*
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* Driver for MacIO GPIO controller
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*/
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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/malloc.h>
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#include <sys/module.h>
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#include <sys/bus.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/intr_machdep.h>
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#include <machine/resource.h>
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#include <machine/vmparam.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/openfirm.h>
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#include <powerpc/powermac/macgpiovar.h>
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/*
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* Macgpio softc
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*/
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struct macgpio_softc {
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phandle_t sc_node;
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struct resource *sc_gpios;
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int sc_gpios_rid;
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uint32_t sc_saved_gpio_levels[2];
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uint32_t sc_saved_gpios[GPIO_COUNT];
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uint32_t sc_saved_extint_gpios[GPIO_EXTINT_COUNT];
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};
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static MALLOC_DEFINE(M_MACGPIO, "macgpio", "macgpio device information");
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static int macgpio_probe(device_t);
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static int macgpio_attach(device_t);
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static int macgpio_print_child(device_t dev, device_t child);
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static void macgpio_probe_nomatch(device_t, device_t);
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static struct resource *macgpio_alloc_resource(device_t, device_t, int, int *,
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rman_res_t, rman_res_t, rman_res_t, u_int);
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static int macgpio_activate_resource(device_t, device_t, int, int,
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struct resource *);
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static int macgpio_deactivate_resource(device_t, device_t, int, int,
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struct resource *);
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static ofw_bus_get_devinfo_t macgpio_get_devinfo;
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static int macgpio_suspend(device_t dev);
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static int macgpio_resume(device_t dev);
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/*
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* Bus interface definition
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*/
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static device_method_t macgpio_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, macgpio_probe),
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DEVMETHOD(device_attach, macgpio_attach),
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DEVMETHOD(device_detach, bus_generic_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, macgpio_suspend),
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DEVMETHOD(device_resume, macgpio_resume),
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/* Bus interface */
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DEVMETHOD(bus_print_child, macgpio_print_child),
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DEVMETHOD(bus_probe_nomatch, macgpio_probe_nomatch),
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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, macgpio_alloc_resource),
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DEVMETHOD(bus_activate_resource, macgpio_activate_resource),
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DEVMETHOD(bus_deactivate_resource, macgpio_deactivate_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_devinfo, macgpio_get_devinfo),
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DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
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DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
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DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
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DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
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DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
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{ 0, 0 }
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};
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static driver_t macgpio_pci_driver = {
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"macgpio",
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macgpio_methods,
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sizeof(struct macgpio_softc)
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};
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devclass_t macgpio_devclass;
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DRIVER_MODULE(macgpio, macio, macgpio_pci_driver, macgpio_devclass, 0, 0);
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struct macgpio_devinfo {
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struct ofw_bus_devinfo mdi_obdinfo;
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struct resource_list mdi_resources;
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int gpio_num;
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};
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static int
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macgpio_probe(device_t dev)
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{
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const char *name;
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name = ofw_bus_get_name(dev);
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if (name && strcmp(name, "gpio") == 0) {
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device_set_desc(dev, "MacIO GPIO Controller");
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return (0);
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}
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return (ENXIO);
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}
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/*
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* Scan Open Firmware child nodes, and attach these as children
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* of the macgpio bus
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*/
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static int
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macgpio_attach(device_t dev)
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{
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struct macgpio_softc *sc;
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struct macgpio_devinfo *dinfo;
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phandle_t root, child, iparent;
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device_t cdev;
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uint32_t irq;
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sc = device_get_softc(dev);
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root = sc->sc_node = ofw_bus_get_node(dev);
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sc->sc_gpios = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->sc_gpios_rid, RF_ACTIVE);
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/*
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* Iterate through the sub-devices
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*/
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for (child = OF_child(root); child != 0; child = OF_peer(child)) {
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dinfo = malloc(sizeof(*dinfo), M_MACGPIO, M_WAITOK | M_ZERO);
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if (ofw_bus_gen_setup_devinfo(&dinfo->mdi_obdinfo, child) !=
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0) {
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free(dinfo, M_MACGPIO);
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continue;
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}
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if (OF_getencprop(child, "reg", &dinfo->gpio_num,
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sizeof(dinfo->gpio_num)) != sizeof(dinfo->gpio_num)) {
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/*
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* Some early GPIO controllers don't provide GPIO
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* numbers for GPIOs designed only to provide
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* interrupt resources. We should still allow these
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* to attach, but with caution.
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*/
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dinfo->gpio_num = -1;
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}
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resource_list_init(&dinfo->mdi_resources);
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if (OF_getencprop(child, "interrupts", &irq, sizeof(irq)) ==
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sizeof(irq)) {
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OF_searchencprop(child, "interrupt-parent", &iparent,
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sizeof(iparent));
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resource_list_add(&dinfo->mdi_resources, SYS_RES_IRQ,
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0, MAP_IRQ(iparent, irq), MAP_IRQ(iparent, irq),
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1);
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}
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/* Fix messed-up offsets */
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if (dinfo->gpio_num > 0x50)
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dinfo->gpio_num -= 0x50;
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cdev = device_add_child(dev, NULL, -1);
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if (cdev == NULL) {
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device_printf(dev, "<%s>: device_add_child failed\n",
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dinfo->mdi_obdinfo.obd_name);
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ofw_bus_gen_destroy_devinfo(&dinfo->mdi_obdinfo);
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free(dinfo, M_MACGPIO);
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continue;
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}
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device_set_ivars(cdev, dinfo);
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}
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return (bus_generic_attach(dev));
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}
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static int
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macgpio_print_child(device_t dev, device_t child)
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{
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struct macgpio_devinfo *dinfo;
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int retval = 0;
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dinfo = device_get_ivars(child);
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retval += bus_print_child_header(dev, child);
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if (dinfo->gpio_num >= GPIO_BASE)
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printf(" gpio %d", dinfo->gpio_num - GPIO_BASE);
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else if (dinfo->gpio_num >= GPIO_EXTINT_BASE)
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printf(" extint-gpio %d", dinfo->gpio_num - GPIO_EXTINT_BASE);
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else if (dinfo->gpio_num >= 0)
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printf(" addr 0x%02x", dinfo->gpio_num); /* should not happen */
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resource_list_print_type(&dinfo->mdi_resources, "irq", SYS_RES_IRQ,
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"%jd");
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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 void
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macgpio_probe_nomatch(device_t dev, device_t child)
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{
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struct macgpio_devinfo *dinfo;
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const char *type;
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if (bootverbose) {
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dinfo = device_get_ivars(child);
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if ((type = ofw_bus_get_type(child)) == NULL)
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type = "(unknown)";
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device_printf(dev, "<%s, %s>", type, ofw_bus_get_name(child));
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if (dinfo->gpio_num >= 0)
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printf(" gpio %d",dinfo->gpio_num);
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resource_list_print_type(&dinfo->mdi_resources, "irq",
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SYS_RES_IRQ, "%jd");
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printf(" (no driver attached)\n");
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}
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}
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static struct resource *
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macgpio_alloc_resource(device_t bus, device_t child, int type, int *rid,
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rman_res_t start, rman_res_t end, rman_res_t count,
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u_int flags)
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{
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struct macgpio_devinfo *dinfo;
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dinfo = device_get_ivars(child);
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if (type != SYS_RES_IRQ)
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return (NULL);
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return (resource_list_alloc(&dinfo->mdi_resources, bus, child, type,
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rid, start, end, count, flags));
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}
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static int
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macgpio_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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struct macgpio_softc *sc;
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struct macgpio_devinfo *dinfo;
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u_char val;
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sc = device_get_softc(bus);
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dinfo = device_get_ivars(child);
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if (type != SYS_RES_IRQ)
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return ENXIO;
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if (dinfo->gpio_num >= 0) {
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val = bus_read_1(sc->sc_gpios,dinfo->gpio_num);
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val |= 0x80;
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bus_write_1(sc->sc_gpios,dinfo->gpio_num,val);
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}
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return (bus_activate_resource(bus, type, rid, res));
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}
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static int
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macgpio_deactivate_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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struct macgpio_softc *sc;
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struct macgpio_devinfo *dinfo;
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u_char val;
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sc = device_get_softc(bus);
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dinfo = device_get_ivars(child);
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if (type != SYS_RES_IRQ)
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return ENXIO;
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if (dinfo->gpio_num >= 0) {
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val = bus_read_1(sc->sc_gpios,dinfo->gpio_num);
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val &= ~0x80;
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bus_write_1(sc->sc_gpios,dinfo->gpio_num,val);
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}
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return (bus_deactivate_resource(bus, type, rid, res));
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}
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uint8_t
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macgpio_read(device_t dev)
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{
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struct macgpio_softc *sc;
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struct macgpio_devinfo *dinfo;
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sc = device_get_softc(device_get_parent(dev));
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dinfo = device_get_ivars(dev);
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if (dinfo->gpio_num < 0)
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return (0);
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return (bus_read_1(sc->sc_gpios,dinfo->gpio_num));
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}
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void
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macgpio_write(device_t dev, uint8_t val)
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{
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struct macgpio_softc *sc;
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struct macgpio_devinfo *dinfo;
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sc = device_get_softc(device_get_parent(dev));
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dinfo = device_get_ivars(dev);
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if (dinfo->gpio_num < 0)
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return;
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bus_write_1(sc->sc_gpios,dinfo->gpio_num,val);
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}
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static const struct ofw_bus_devinfo *
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macgpio_get_devinfo(device_t dev, device_t child)
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{
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struct macgpio_devinfo *dinfo;
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dinfo = device_get_ivars(child);
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return (&dinfo->mdi_obdinfo);
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}
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static int
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macgpio_suspend(device_t dev)
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{
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struct macgpio_softc *sc;
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int i;
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sc = device_get_softc(dev);
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sc->sc_saved_gpio_levels[0] = bus_read_4(sc->sc_gpios, GPIO_LEVELS_0);
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sc->sc_saved_gpio_levels[1] = bus_read_4(sc->sc_gpios, GPIO_LEVELS_1);
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for (i = 0; i < GPIO_COUNT; i++)
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sc->sc_saved_gpios[i] = bus_read_1(sc->sc_gpios, GPIO_BASE + i);
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for (i = 0; i < GPIO_EXTINT_COUNT; i++)
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sc->sc_saved_extint_gpios[i] = bus_read_1(sc->sc_gpios, GPIO_EXTINT_BASE + i);
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return (0);
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}
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static int
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macgpio_resume(device_t dev)
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{
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struct macgpio_softc *sc;
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int i;
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sc = device_get_softc(dev);
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bus_write_4(sc->sc_gpios, GPIO_LEVELS_0, sc->sc_saved_gpio_levels[0]);
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bus_write_4(sc->sc_gpios, GPIO_LEVELS_1, sc->sc_saved_gpio_levels[1]);
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for (i = 0; i < GPIO_COUNT; i++)
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bus_write_1(sc->sc_gpios, GPIO_BASE + i, sc->sc_saved_gpios[i]);
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for (i = 0; i < GPIO_EXTINT_COUNT; i++)
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bus_write_1(sc->sc_gpios, GPIO_EXTINT_BASE + i, sc->sc_saved_extint_gpios[i]);
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return (0);
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}
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