dd03e19c08
Currently the code is not built by any modules. That will be fixed later. The Atmel ARM bus interface file part of this commit is just for sake of example. All registers and bits are declared like macros and not C-structures like in official Synopsis header files. This driver mostly origins from the musb_otg.c driver in FreeBSD except that the chip specific programming has been replaced by the one for DWC 2.0 USB OTG. Some parts related to system suspend and resume have been left like empty functions for the future. USB suspend and resume is fully supported.
200 lines
5.5 KiB
C
200 lines
5.5 KiB
C
/*-
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* Copyright (c) 2012 Hans Petter Selasky. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_util.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_bus.h>
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#include <dev/usb/controller/dwc_otg.h>
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static device_probe_t dwc_otg_probe;
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static device_attach_t dwc_otg_attach;
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static device_detach_t dwc_otg_detach;
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struct dwc_otg_super_softc {
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struct dwc_otg_softc sc_otg; /* must be first */
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};
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static int
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dwc_otg_probe(device_t dev)
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{
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device_set_desc(dev, "DWC OTG 2.0 integrated USB controller");
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return (0);
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}
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static int
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dwc_otg_attach(device_t dev)
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{
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struct dwc_otg_super_softc *sc = device_get_softc(dev);
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int err;
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int rid;
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/* initialise some bus fields */
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sc->sc_otg.sc_bus.parent = dev;
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sc->sc_otg.sc_bus.devices = sc->sc_otg.sc_devices;
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sc->sc_otg.sc_bus.devices_max = DWC_OTG_MAX_DEVICES;
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/* get all DMA memory */
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if (usb_bus_mem_alloc_all(&sc->sc_otg.sc_bus,
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USB_GET_DMA_TAG(dev), NULL)) {
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return (ENOMEM);
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}
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rid = 0;
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sc->sc_otg.sc_io_res =
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bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (!(sc->sc_otg.sc_io_res)) {
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err = ENOMEM;
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goto error;
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}
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sc->sc_otg.sc_io_tag = rman_get_bustag(sc->sc_otg.sc_io_res);
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sc->sc_otg.sc_io_hdl = rman_get_bushandle(sc->sc_otg.sc_io_res);
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sc->sc_otg.sc_io_size = rman_get_size(sc->sc_otg.sc_io_res);
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rid = 0;
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sc->sc_otg.sc_irq_res =
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bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
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if (sc->sc_otg.sc_irq_res == NULL)
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goto error;
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sc->sc_otg.sc_bus.bdev = device_add_child(dev, "usbus", -1);
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if (sc->sc_otg.sc_bus.bdev == NULL)
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goto error;
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device_set_ivars(sc->sc_otg.sc_bus.bdev, &sc->sc_otg.sc_bus);
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err = bus_setup_intr(dev, sc->sc_otg.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, (driver_intr_t *)dwc_otg_interrupt, sc, &sc->sc_otg.sc_intr_hdl);
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if (err) {
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sc->sc_otg.sc_intr_hdl = NULL;
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goto error;
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}
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err = dwc_otg_init(&sc->sc_otg);
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if (err == 0) {
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err = device_probe_and_attach(sc->sc_otg.sc_bus.bdev);
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}
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if (err)
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goto error;
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return (0);
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error:
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dwc_otg_detach(dev);
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return (ENXIO);
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}
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static int
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dwc_otg_detach(device_t dev)
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{
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struct dwc_otg_super_softc *sc = device_get_softc(dev);
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device_t bdev;
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int err;
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if (sc->sc_otg.sc_bus.bdev) {
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bdev = sc->sc_otg.sc_bus.bdev;
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device_detach(bdev);
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device_delete_child(dev, bdev);
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}
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/* during module unload there are lots of children leftover */
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device_delete_children(dev);
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if (sc->sc_otg.sc_irq_res && sc->sc_otg.sc_intr_hdl) {
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/*
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* only call dwc_otg_uninit() after dwc_otg_init()
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*/
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dwc_otg_uninit(&sc->sc_otg);
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err = bus_teardown_intr(dev, sc->sc_otg.sc_irq_res,
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sc->sc_otg.sc_intr_hdl);
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sc->sc_otg.sc_intr_hdl = NULL;
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}
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/* free IRQ channel, if any */
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if (sc->sc_otg.sc_irq_res) {
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bus_release_resource(dev, SYS_RES_IRQ, 0,
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sc->sc_otg.sc_irq_res);
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sc->sc_otg.sc_irq_res = NULL;
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}
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/* free memory resource, if any */
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if (sc->sc_otg.sc_io_res) {
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bus_release_resource(dev, SYS_RES_MEMORY, 0,
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sc->sc_otg.sc_io_res);
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sc->sc_otg.sc_io_res = NULL;
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}
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usb_bus_mem_free_all(&sc->sc_otg.sc_bus, NULL);
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return (0);
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}
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static device_method_t dwc_otg_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, dwc_otg_probe),
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DEVMETHOD(device_attach, dwc_otg_attach),
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DEVMETHOD(device_detach, dwc_otg_detach),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD_END
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};
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static driver_t dwc_otg_driver = {
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.name = "dwc_otg",
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.methods = dwc_otg_methods,
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.size = sizeof(struct dwc_otg_super_softc),
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};
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static devclass_t dwc_otg_devclass;
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DRIVER_MODULE(dwcotg, atmelarm, dwc_otg_driver, dwc_otg_devclass, 0, 0);
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MODULE_DEPEND(dwcotg, usb, 1, 1, 1);
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