232 lines
6.6 KiB
C
232 lines
6.6 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 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 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/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/bus.h>
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#include <sys/queue.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.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/usbdivar.h>
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#include <dev/usb/usb_mem.h>
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#include <dev/usb/ohcireg.h>
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#include <dev/usb/ohcivar.h>
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#include <arm/at91/at91_pmcvar.h>
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#define MEM_RID 0
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static int ohci_atmelarm_attach(device_t dev);
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static int ohci_atmelarm_detach(device_t dev);
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struct at91_ohci_softc
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{
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struct ohci_softc sc_ohci;
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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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sc->iclk = at91_pmc_clock_ref("ohci_clk");
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sc->fclk = at91_pmc_clock_ref("uhpck");
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rid = MEM_RID;
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sc->sc_ohci.io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->sc_ohci.io_res == NULL) {
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err = ENOMEM;
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goto error;
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}
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sc->sc_ohci.iot = rman_get_bustag(sc->sc_ohci.io_res);
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sc->sc_ohci.ioh = rman_get_bushandle(sc->sc_ohci.io_res);
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rid = 0;
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sc->sc_ohci.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.irq_res == NULL) {
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err = ENOMEM;
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goto error;
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}
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sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usb", -1);
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if (sc->sc_ohci.sc_bus.bdev == NULL) {
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err = ENOMEM;
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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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/* Allocate a parent dma tag for DMA maps */
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err = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
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BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
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BUS_SPACE_MAXSIZE_32BIT, USB_DMA_NSEG, BUS_SPACE_MAXSIZE_32BIT, 0,
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NULL, NULL, &sc->sc_ohci.sc_bus.parent_dmatag);
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if (err) {
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device_printf(dev, "Could not allocate parent DMA tag (%d)\n",
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err);
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err = ENXIO;
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goto error;
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}
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/* Allocate a dma tag for transfer buffers */
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err = bus_dma_tag_create(sc->sc_ohci.sc_bus.parent_dmatag, 1, 0,
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BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
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BUS_SPACE_MAXSIZE_32BIT, USB_DMA_NSEG, BUS_SPACE_MAXSIZE_32BIT, 0,
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busdma_lock_mutex, &Giant, &sc->sc_ohci.sc_bus.buffer_dmatag);
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if (err) {
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device_printf(dev, "Could not allocate transfer tag (%d)\n",
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err);
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err = ENXIO;
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goto error;
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}
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err = bus_setup_intr(dev, sc->sc_ohci.irq_res, INTR_TYPE_BIO, NULL,
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ohci_intr, sc, &sc->sc_ohci.ih);
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if (err) {
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err = ENXIO;
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goto error;
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}
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strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor));
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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.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
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err = ohci_init(&sc->sc_ohci);
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if (!err) {
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sc->sc_ohci.sc_flags |= OHCI_SCFLG_DONEINIT;
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err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
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}
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error:;
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if (err) {
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ohci_atmelarm_detach(dev);
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return (err);
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}
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return (err);
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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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if (sc->sc_ohci.sc_flags & OHCI_SCFLG_DONEINIT) {
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ohci_detach(&sc->sc_ohci, 0);
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sc->sc_ohci.sc_flags &= ~OHCI_SCFLG_DONEINIT;
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}
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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.iot, sc->sc_ohci.ioh, 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.ih) {
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bus_teardown_intr(dev, sc->sc_ohci.irq_res, sc->sc_ohci.ih);
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sc->sc_ohci.ih = NULL;
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}
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if (sc->sc_ohci.sc_bus.parent_dmatag != NULL)
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bus_dma_tag_destroy(sc->sc_ohci.sc_bus.parent_dmatag);
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if (sc->sc_ohci.sc_bus.buffer_dmatag != NULL)
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bus_dma_tag_destroy(sc->sc_ohci.sc_bus.buffer_dmatag);
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if (sc->sc_ohci.sc_bus.bdev) {
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device_delete_child(dev, sc->sc_ohci.sc_bus.bdev);
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sc->sc_ohci.sc_bus.bdev = NULL;
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}
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if (sc->sc_ohci.irq_res) {
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bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.irq_res);
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sc->sc_ohci.irq_res = NULL;
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}
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if (sc->sc_ohci.io_res) {
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bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID, sc->sc_ohci.io_res);
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sc->sc_ohci.io_res = NULL;
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sc->sc_ohci.iot = 0;
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sc->sc_ohci.ioh = 0;
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}
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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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