1def609a63
all host controllers at the same time, we avoid problems where the BIOS will actually write to the USB registers of all the USB host controllers every time we handover one of them, and consequently reset the OS programmed values. Submitted by: avg Reviewed by: jhb
243 lines
6.8 KiB
C
243 lines
6.8 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/linker_set.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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#define MEM_RID 0
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static device_probe_t ohci_atmelarm_probe;
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static device_attach_t ohci_atmelarm_attach;
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static device_detach_t ohci_atmelarm_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 *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_atmelarm_probe(device_t dev)
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{
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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_atmelarm_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->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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#if (__FreeBSD_version >= 700031)
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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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#else
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err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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(driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl);
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#endif
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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->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_atmelarm_detach(dev);
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return (ENXIO);
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}
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static int
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ohci_atmelarm_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_all_children(dev);
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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_deref(sc->fclk);
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at91_pmc_clock_deref(sc->iclk);
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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, 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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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_atmelarm_probe),
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DEVMETHOD(device_attach, ohci_atmelarm_attach),
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DEVMETHOD(device_detach, ohci_atmelarm_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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/* Bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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{0, 0}
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};
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static driver_t ohci_driver = {
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"ohci",
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ohci_methods,
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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, atmelarm, ohci_driver, ohci_devclass, 0, 0);
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MODULE_DEPEND(ohci, usb, 1, 1, 1);
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