source: rtems-libbsd/freebsd/sys/dev/usb/controller/saf1761_otg_fdt.c @ f9d4e1d

#include <machine/rtems-bsd-kernel-space.h>

/* $FreeBSD$ */
/*-
 * Copyright (c) 2014 Hans Petter Selasky <hselasky@FreeBSD.org>
 * All rights reserved.
 *
 * This software was developed by SRI International and the University of
 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
 * ("CTSRD"), as part of the DARPA CRASH research programme.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 */

#ifdef USB_GLOBAL_INCLUDE_FILE
#include USB_GLOBAL_INCLUDE_FILE
#else
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <rtems/bsd/sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <sys/rman.h>

#include <dev/fdt/fdt_common.h>

#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>

#include <dev/usb/usb_core.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/usb_transfer.h>
#include <dev/usb/usb_device.h>
#include <dev/usb/usb_hub.h>
#include <dev/usb/usb_util.h>

#include <dev/usb/usb_controller.h>
#include <dev/usb/usb_bus.h>
#endif                                  /* USB_GLOBAL_INCLUDE_FILE */

#include <dev/usb/controller/saf1761_otg.h>
#include <dev/usb/controller/saf1761_otg_reg.h>
#ifdef __rtems__
#include <rtems.h>
#include <bsp.h>
#ifdef LIBBSP_ARM_ATSAM_BSP_H
#include <bsp/pin-config.h>
#endif /* LIBBSP_ARM_ATSAM_BSP_H */
#endif /* __rtems__ */

static device_probe_t saf1761_otg_fdt_probe;
static device_attach_t saf1761_otg_fdt_attach;
static device_detach_t saf1761_otg_fdt_detach;

static device_method_t saf1761_otg_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe, saf1761_otg_fdt_probe),
        DEVMETHOD(device_attach, saf1761_otg_fdt_attach),
        DEVMETHOD(device_detach, saf1761_otg_fdt_detach),
        DEVMETHOD(device_suspend, bus_generic_suspend),
        DEVMETHOD(device_resume, bus_generic_resume),
        DEVMETHOD(device_shutdown, bus_generic_shutdown),

        DEVMETHOD_END
};

static driver_t saf1761_otg_driver = {
        .name = "saf1761otg",
        .methods = saf1761_otg_methods,
        .size = sizeof(struct saf1761_otg_softc),
};

static devclass_t saf1761_otg_devclass;

#ifndef __rtems__
DRIVER_MODULE(saf1761otg, simplebus, saf1761_otg_driver, saf1761_otg_devclass, 0, 0);
#else /* __rtems__ */
DRIVER_MODULE(saf1761otg, nexus, saf1761_otg_driver, saf1761_otg_devclass, 0, 0);
#endif /* __rtems__ */
MODULE_DEPEND(saf1761otg, usb, 1, 1, 1);

static int
saf1761_otg_fdt_probe(device_t dev)
{
#ifndef __rtems__
        if (!ofw_bus_status_okay(dev))
                return (ENXIO);

        if (!ofw_bus_is_compatible(dev, "nxp,usb-isp1761"))
                return (ENXIO);
#else /* __rtems__ */
        if (device_get_unit(dev) != 0)
                return (ENXIO);
#endif /* __rtems__ */

        device_set_desc(dev, "ISP1761/SAF1761 DCI USB 2.0 Device Controller");

        return (0);
}

static int
saf1761_otg_fdt_attach(device_t dev)
{
        struct saf1761_otg_softc *sc = device_get_softc(dev);
        char param[24];
        int err;
        int rid;

#ifndef __rtems__
        /* get configuration from FDT */

        /* get bus-width, if any */
        if (OF_getprop(ofw_bus_get_node(dev), "bus-width",
            &param, sizeof(param)) > 0) {
                param[sizeof(param) - 1] = 0;
                if (strcmp(param, "32") == 0)
                        sc->sc_hw_mode |= SOTG_HW_MODE_CTRL_DATA_BUS_WIDTH;
        } else {
                /* assume 32-bit data bus */
                sc->sc_hw_mode |= SOTG_HW_MODE_CTRL_DATA_BUS_WIDTH;
        }

        /* get analog over-current setting */
        if (OF_getprop(ofw_bus_get_node(dev), "analog-oc",
            &param, sizeof(param)) > 0) {
                sc->sc_hw_mode |= SOTG_HW_MODE_CTRL_ANA_DIGI_OC;
        }

        /* get DACK polarity */
        if (OF_getprop(ofw_bus_get_node(dev), "dack-polarity",
            &param, sizeof(param)) > 0) {
                sc->sc_hw_mode |= SOTG_HW_MODE_CTRL_DACK_POL;
        }

        /* get DREQ polarity */
        if (OF_getprop(ofw_bus_get_node(dev), "dreq-polarity",
            &param, sizeof(param)) > 0) {
                sc->sc_hw_mode |= SOTG_HW_MODE_CTRL_DREQ_POL;
        }

        /* get IRQ polarity */
        if (OF_getprop(ofw_bus_get_node(dev), "int-polarity",
            &param, sizeof(param)) > 0) {
                sc->sc_interrupt_cfg |= SOTG_INTERRUPT_CFG_INTPOL;
                sc->sc_hw_mode |= SOTG_HW_MODE_CTRL_INTR_POL;
        }

        /* get IRQ level triggering */
        if (OF_getprop(ofw_bus_get_node(dev), "int-level",
            &param, sizeof(param)) > 0) {
                sc->sc_interrupt_cfg |= SOTG_INTERRUPT_CFG_INTLVL;
                sc->sc_hw_mode |= SOTG_HW_MODE_CTRL_INTR_LEVEL;
        }
#else /* __rtems__ */
        /* set 16-bit data bus */
        sc->sc_hw_mode = 0;
#endif /* __rtems__ */

        /* initialise some bus fields */
        sc->sc_bus.parent = dev;
        sc->sc_bus.devices = sc->sc_devices;
        sc->sc_bus.devices_max = SOTG_MAX_DEVICES;
        sc->sc_bus.dma_bits = 32;

        /* get all DMA memory */
        if (usb_bus_mem_alloc_all(&sc->sc_bus,
            USB_GET_DMA_TAG(dev), NULL)) {
                return (ENOMEM);
        }
        rid = 0;
        sc->sc_io_res =
            bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);

        if (sc->sc_io_res == NULL) 
                goto error;

        sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
        sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
        sc->sc_io_size = rman_get_size(sc->sc_io_res);

        /* try to allocate the HC interrupt first */
        rid = 1;
        sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
            RF_SHAREABLE | RF_ACTIVE);
        if (sc->sc_irq_res == NULL) {
                /* try to allocate a common IRQ second */
                rid = 0;
                sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
                    RF_SHAREABLE | RF_ACTIVE);
                if (sc->sc_irq_res == NULL)
                        goto error;
        }

        sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
        if (sc->sc_bus.bdev == NULL)
                goto error;

        device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);

#ifdef __rtems__
#ifdef LIBBSP_ARM_ATSAM_BSP_H
        const Pin saf_irq = {PIO_PC16, PIOC, ID_PIOC, PIO_INPUT, PIO_PULLUP | PIO_IT_LOW_LEVEL};
        /* Activate pin interrupt. Add a default handler that just clears the
         * status. */
        PIO_Configure(&saf_irq, 1);
        PIO_EnableIt(&saf_irq);
#endif /* LIBBSP_ARM_ATSAM_BSP_H */
#endif /* __rtems__ */
        err = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_TTY | INTR_MPSAFE,
            &saf1761_otg_filter_interrupt, &saf1761_otg_interrupt, sc, &sc->sc_intr_hdl);
        if (err) {
                sc->sc_intr_hdl = NULL;
                goto error;
        }
        err = saf1761_otg_init(sc);
        if (err) {
                device_printf(dev, "Init failed\n");
                goto error;
        }
        err = device_probe_and_attach(sc->sc_bus.bdev);
        if (err) {
                device_printf(dev, "USB probe and attach failed\n");
                goto error;
        }
        return (0);

error:
        saf1761_otg_fdt_detach(dev);
        return (ENXIO);
}

static int
saf1761_otg_fdt_detach(device_t dev)
{
        struct saf1761_otg_softc *sc = device_get_softc(dev);
        int err;

        /* during module unload there are lots of children leftover */
        device_delete_children(dev);

        if (sc->sc_irq_res && sc->sc_intr_hdl) {
                /*
                 * Only call uninit() after init()
                 */
                saf1761_otg_uninit(sc);

                err = bus_teardown_intr(dev, sc->sc_irq_res,
                    sc->sc_intr_hdl);
                sc->sc_intr_hdl = NULL;
        }
        if (sc->sc_irq_res) {
                bus_release_resource(dev, SYS_RES_IRQ, 0,
                    sc->sc_irq_res);
                sc->sc_irq_res = NULL;
        }
        if (sc->sc_io_res) {
                bus_release_resource(dev, SYS_RES_MEMORY, 0,
                    sc->sc_io_res);
                sc->sc_io_res = NULL;
        }
        usb_bus_mem_free_all(&sc->sc_bus, NULL);

        return (0);
}