diff options
Diffstat (limited to 'sys/arm/at91/at91_ohci_fdt.c')
| -rw-r--r-- | sys/arm/at91/at91_ohci_fdt.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/sys/arm/at91/at91_ohci_fdt.c b/sys/arm/at91/at91_ohci_fdt.c new file mode 100644 index 000000000000..091cd98305f1 --- /dev/null +++ b/sys/arm/at91/at91_ohci_fdt.c @@ -0,0 +1,244 @@ +/*- + * Copyright (c) 2006 M. Warner Losh. All rights reserved. + * + * 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 ``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 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#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 <sys/unistd.h> +#include <sys/callout.h> +#include <sys/malloc.h> +#include <sys/priv.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_util.h> + +#include <dev/usb/usb_controller.h> +#include <dev/usb/usb_bus.h> +#include <dev/usb/controller/ohci.h> +#include <dev/usb/controller/ohcireg.h> + +#include <sys/rman.h> + +#include <arm/at91/at91_pmcvar.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#define MEM_RID 0 + +static device_probe_t ohci_at91_fdt_probe; +static device_attach_t ohci_at91_fdt_attach; +static device_detach_t ohci_at91_fdt_detach; + +struct at91_ohci_softc { + struct ohci_softc sc_ohci; /* must be first */ + struct at91_pmc_clock *mclk; + struct at91_pmc_clock *iclk; + struct at91_pmc_clock *fclk; +}; + +static int +ohci_at91_fdt_probe(device_t dev) +{ + if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-ohci")) + return (ENXIO); + device_set_desc(dev, "AT91 integrated OHCI controller"); + + return (BUS_PROBE_DEFAULT); +} + +static int +ohci_at91_fdt_attach(device_t dev) +{ + struct at91_ohci_softc *sc = device_get_softc(dev); + int err; + int rid; + + /* initialise some bus fields */ + sc->sc_ohci.sc_bus.parent = dev; + sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices; + sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES; + sc->sc_ohci.sc_bus.dma_bits = 32; + + /* get all DMA memory */ + if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus, + USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) { + return (ENOMEM); + } + sc->mclk = at91_pmc_clock_ref("mck"); + sc->iclk = at91_pmc_clock_ref("ohci_clk"); + sc->fclk = at91_pmc_clock_ref("uhpck"); + + sc->sc_ohci.sc_dev = dev; + + rid = MEM_RID; + sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, + &rid, RF_ACTIVE); + + if (!(sc->sc_ohci.sc_io_res)) { + err = ENOMEM; + goto error; + } + sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res); + sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res); + sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res); + + rid = 0; + sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, + RF_ACTIVE); + if (!(sc->sc_ohci.sc_irq_res)) { + goto error; + } + sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1); + if (!(sc->sc_ohci.sc_bus.bdev)) { + goto error; + } + device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus); + + strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor)); + + err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE, + NULL, (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl); + if (err) { + sc->sc_ohci.sc_intr_hdl = NULL; + goto error; + } + /* + * turn on the clocks from the AT91's point of view. Keep the unit in reset. + */ + at91_pmc_clock_enable(sc->mclk); + at91_pmc_clock_enable(sc->iclk); + at91_pmc_clock_enable(sc->fclk); + bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, + OHCI_CONTROL, 0); + + err = ohci_init(&sc->sc_ohci); + if (!err) { + err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev); + } + if (err) { + goto error; + } + return (0); + +error: + ohci_at91_fdt_detach(dev); + return (ENXIO); +} + +static int +ohci_at91_fdt_detach(device_t dev) +{ + struct at91_ohci_softc *sc = device_get_softc(dev); + int err; + + /* during module unload there are lots of children leftover */ + device_delete_children(dev); + + if (sc->sc_ohci.sc_io_res != NULL) { + /* + * Put the controller into reset, then disable clocks and do + * the MI tear down. We have to disable the clocks/hardware + * after we do the rest of the teardown. We also disable the + * clocks in the opposite order we acquire them, but that + * doesn't seem to be absolutely necessary. We free up the + * clocks after we disable them, so the system could, in + * theory, reuse them. + */ + bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, + OHCI_CONTROL, 0); + + at91_pmc_clock_disable(sc->fclk); + at91_pmc_clock_disable(sc->iclk); + at91_pmc_clock_disable(sc->mclk); + at91_pmc_clock_deref(sc->fclk); + at91_pmc_clock_deref(sc->iclk); + at91_pmc_clock_deref(sc->mclk); + + if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) { + /* + * only call ohci_detach() after ohci_init() + */ + ohci_detach(&sc->sc_ohci); + + err = bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, + sc->sc_ohci.sc_intr_hdl); + sc->sc_ohci.sc_intr_hdl = NULL; + } + if (sc->sc_ohci.sc_irq_res) { + bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res); + sc->sc_ohci.sc_irq_res = NULL; + } + if (sc->sc_ohci.sc_io_res) { + bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID, + sc->sc_ohci.sc_io_res); + sc->sc_ohci.sc_io_res = NULL; + } + } + usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc); + + return (0); +} + +static device_method_t ohci_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, ohci_at91_fdt_probe), + DEVMETHOD(device_attach, ohci_at91_fdt_attach), + DEVMETHOD(device_detach, ohci_at91_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 ohci_driver = { + .name = "ohci", + .methods = ohci_methods, + .size = sizeof(struct at91_ohci_softc), +}; + +static devclass_t ohci_devclass; + +DRIVER_MODULE(ohci, simplebus, ohci_driver, ohci_devclass, 0, 0); +MODULE_DEPEND(ohci, usb, 1, 1, 1); |