251 lines
7.1 KiB
C
251 lines
7.1 KiB
C
/*-
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* Copyright (c) 2006 M. Warner Losh. 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, 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/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/ohci.h>
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#include <dev/usb/controller/ohcireg.h>
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#include <sys/rman.h>
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#include <arm/at91/at91_pmcvar.h>
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#include <dev/fdt/fdt_common.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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#define MEM_RID 0
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static device_probe_t ohci_at91_fdt_probe;
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static device_attach_t ohci_at91_fdt_attach;
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static device_detach_t ohci_at91_fdt_detach;
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struct at91_ohci_softc {
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struct ohci_softc sc_ohci; /* must be first */
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struct at91_pmc_clock *mclk;
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struct at91_pmc_clock *iclk;
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struct at91_pmc_clock *fclk;
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};
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static int
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ohci_at91_fdt_probe(device_t dev)
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{
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if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-ohci"))
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return (ENXIO);
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device_set_desc(dev, "AT91 integrated OHCI controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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ohci_at91_fdt_attach(device_t dev)
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{
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struct at91_ohci_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_ohci.sc_bus.parent = dev;
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sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices;
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sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES;
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/* get all DMA memory */
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if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
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USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
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return (ENOMEM);
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}
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sc->mclk = at91_pmc_clock_ref("mck");
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sc->iclk = at91_pmc_clock_ref("ohci_clk");
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sc->fclk = at91_pmc_clock_ref("uhpck");
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sc->sc_ohci.sc_dev = dev;
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rid = MEM_RID;
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sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&rid, RF_ACTIVE);
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if (!(sc->sc_ohci.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_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
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sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
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sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
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rid = 0;
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sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_ACTIVE);
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if (!(sc->sc_ohci.sc_irq_res)) {
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goto error;
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}
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sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
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if (!(sc->sc_ohci.sc_bus.bdev)) {
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goto error;
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}
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device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
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strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor));
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err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl);
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if (err) {
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sc->sc_ohci.sc_intr_hdl = NULL;
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goto error;
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}
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/*
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* turn on the clocks from the AT91's point of view. Keep the unit in reset.
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*/
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at91_pmc_clock_enable(sc->mclk);
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at91_pmc_clock_enable(sc->iclk);
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at91_pmc_clock_enable(sc->fclk);
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bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
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OHCI_CONTROL, 0);
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err = ohci_init(&sc->sc_ohci);
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if (!err) {
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err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
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}
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if (err) {
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goto error;
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}
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return (0);
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error:
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ohci_at91_fdt_detach(dev);
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return (ENXIO);
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}
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static int
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ohci_at91_fdt_detach(device_t dev)
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{
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struct at91_ohci_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_ohci.sc_bus.bdev) {
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bdev = sc->sc_ohci.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_ohci.sc_io_res != NULL) {
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/*
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* Put the controller into reset, then disable clocks and do
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* the MI tear down. We have to disable the clocks/hardware
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* after we do the rest of the teardown. We also disable the
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* clocks in the opposite order we acquire them, but that
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* doesn't seem to be absolutely necessary. We free up the
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* clocks after we disable them, so the system could, in
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* theory, reuse them.
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*/
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bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
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OHCI_CONTROL, 0);
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at91_pmc_clock_disable(sc->fclk);
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at91_pmc_clock_disable(sc->iclk);
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at91_pmc_clock_disable(sc->mclk);
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at91_pmc_clock_deref(sc->fclk);
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at91_pmc_clock_deref(sc->iclk);
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at91_pmc_clock_deref(sc->mclk);
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if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
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/*
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* only call ohci_detach() after ohci_init()
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*/
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ohci_detach(&sc->sc_ohci);
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err = bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res,
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sc->sc_ohci.sc_intr_hdl);
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sc->sc_ohci.sc_intr_hdl = NULL;
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}
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if (sc->sc_ohci.sc_irq_res) {
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
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sc->sc_ohci.sc_irq_res = NULL;
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}
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if (sc->sc_ohci.sc_io_res) {
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bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID,
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sc->sc_ohci.sc_io_res);
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sc->sc_ohci.sc_io_res = NULL;
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}
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}
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usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
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return (0);
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}
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static device_method_t ohci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ohci_at91_fdt_probe),
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DEVMETHOD(device_attach, ohci_at91_fdt_attach),
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DEVMETHOD(device_detach, ohci_at91_fdt_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 ohci_driver = {
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.name = "ohci",
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.methods = ohci_methods,
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.size = sizeof(struct at91_ohci_softc),
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};
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static devclass_t ohci_devclass;
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DRIVER_MODULE(ohci, simplebus, ohci_driver, ohci_devclass, 0, 0);
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MODULE_DEPEND(ohci, usb, 1, 1, 1);
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