sys/arm/at91/at91_ohci_fdt.c

   1 /*-
   2  * Copyright (c) 2006 M. Warner Losh.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include <sys/cdefs.h>
  26 __FBSDID("$FreeBSD$");
  27
  28 #include <sys/stdint.h>
  29 #include <sys/stddef.h>
  30 #include <sys/param.h>
  31 #include <sys/queue.h>
  32 #include <sys/types.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/bus.h>
  36 #include <sys/module.h>
  37 #include <sys/lock.h>
  38 #include <sys/mutex.h>
  39 #include <sys/condvar.h>
  40 #include <sys/sysctl.h>
  41 #include <sys/sx.h>
  42 #include <sys/unistd.h>
  43 #include <sys/callout.h>
  44 #include <sys/malloc.h>
  45 #include <sys/priv.h>
  46
  47 #include <dev/usb/usb.h>
  48 #include <dev/usb/usbdi.h>
  49
  50 #include <dev/usb/usb_core.h>
  51 #include <dev/usb/usb_busdma.h>
  52 #include <dev/usb/usb_process.h>
  53 #include <dev/usb/usb_util.h>
  54
  55 #include <dev/usb/usb_controller.h>
  56 #include <dev/usb/usb_bus.h>
  57 #include <dev/usb/controller/ohci.h>
  58 #include <dev/usb/controller/ohcireg.h>
  59
  60 #include <sys/rman.h>
  61
  62 #include <arm/at91/at91_pmcvar.h>
  63
  64 #include <dev/ofw/ofw_bus.h>
  65 #include <dev/ofw/ofw_bus_subr.h>
  66
  67 #define MEM_RID 0
  68
  69 static device_probe_t ohci_at91_fdt_probe;
  70 static device_attach_t ohci_at91_fdt_attach;
  71 static device_detach_t ohci_at91_fdt_detach;
  72
  73 struct at91_ohci_softc {
  74         struct ohci_softc sc_ohci;      /* must be first */
  75         struct at91_pmc_clock *mclk;
  76         struct at91_pmc_clock *iclk;
  77         struct at91_pmc_clock *fclk;
  78 };
  79
  80 static int
  81 ohci_at91_fdt_probe(device_t dev)
  82 {
  83         if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-ohci"))
  84                 return (ENXIO);
  85         device_set_desc(dev, "AT91 integrated OHCI controller");
  86
  87         return (BUS_PROBE_DEFAULT);
  88 }
  89
  90 static int
  91 ohci_at91_fdt_attach(device_t dev)
  92 {
  93         struct at91_ohci_softc *sc = device_get_softc(dev);
  94         int err;
  95         int rid;
  96
  97         /* initialise some bus fields */
  98         sc->sc_ohci.sc_bus.parent = dev;
  99         sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices;
 100         sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES;
 101         sc->sc_ohci.sc_bus.dma_bits = 32;
 102
 103         /* get all DMA memory */
 104         if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
 105             USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
 106                 return (ENOMEM);
 107         }
 108         sc->mclk = at91_pmc_clock_ref("mck");
 109         sc->iclk = at91_pmc_clock_ref("ohci_clk");
 110         sc->fclk = at91_pmc_clock_ref("uhpck");
 111
 112         sc->sc_ohci.sc_dev = dev;
 113
 114         rid = MEM_RID;
 115         sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
 116             &rid, RF_ACTIVE);
 117
 118         if (!(sc->sc_ohci.sc_io_res)) {
 119                 err = ENOMEM;
 120                 goto error;
 121         }
 122         sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
 123         sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
 124         sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
 125
 126         rid = 0;
 127         sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
 128             RF_ACTIVE);
 129         if (!(sc->sc_ohci.sc_irq_res)) {
 130                 goto error;
 131         }
 132         sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
 133         if (!(sc->sc_ohci.sc_bus.bdev)) {
 134                 goto error;
 135         }
 136         device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
 137
 138         strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor));
 139
 140         err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
 141             NULL, (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl);
 142         if (err) {
 143                 sc->sc_ohci.sc_intr_hdl = NULL;
 144                 goto error;
 145         }
 146         /*
 147          * turn on the clocks from the AT91's point of view.  Keep the unit in reset.
 148          */
 149         at91_pmc_clock_enable(sc->mclk);
 150         at91_pmc_clock_enable(sc->iclk);
 151         at91_pmc_clock_enable(sc->fclk);
 152         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
 153             OHCI_CONTROL, 0);
 154
 155         err = ohci_init(&sc->sc_ohci);
 156         if (!err) {
 157                 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
 158         }
 159         if (err) {
 160                 goto error;
 161         }
 162         return (0);
 163
 164 error:
 165         ohci_at91_fdt_detach(dev);
 166         return (ENXIO);
 167 }
 168
 169 static int
 170 ohci_at91_fdt_detach(device_t dev)
 171 {
 172         struct at91_ohci_softc *sc = device_get_softc(dev);
 173         int err;
 174
 175         /* during module unload there are lots of children leftover */
 176         device_delete_children(dev);
 177
 178         if (sc->sc_ohci.sc_io_res != NULL) {
 179                 /*
 180                  * Put the controller into reset, then disable clocks and do
 181                  * the MI tear down.  We have to disable the clocks/hardware
 182                  * after we do the rest of the teardown.  We also disable the
 183                  * clocks in the opposite order we acquire them, but that
 184                  * doesn't seem to be absolutely necessary.  We free up the
 185                  * clocks after we disable them, so the system could, in
 186                  * theory, reuse them.
 187                  */
 188                 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
 189                                   OHCI_CONTROL, 0);
 190
 191                 at91_pmc_clock_disable(sc->fclk);
 192                 at91_pmc_clock_disable(sc->iclk);
 193                 at91_pmc_clock_disable(sc->mclk);
 194                 at91_pmc_clock_deref(sc->fclk);
 195                 at91_pmc_clock_deref(sc->iclk);
 196                 at91_pmc_clock_deref(sc->mclk);
 197
 198                 if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
 199                         /*
 200                          * only call ohci_detach() after ohci_init()
 201                          */
 202                         ohci_detach(&sc->sc_ohci);
 203
 204                         err = bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res,
 205                             sc->sc_ohci.sc_intr_hdl);
 206                         sc->sc_ohci.sc_intr_hdl = NULL;
 207                 }
 208                 if (sc->sc_ohci.sc_irq_res) {
 209                         bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
 210                         sc->sc_ohci.sc_irq_res = NULL;
 211                 }
 212                 if (sc->sc_ohci.sc_io_res) {
 213                         bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID,
 214                                              sc->sc_ohci.sc_io_res);
 215                         sc->sc_ohci.sc_io_res = NULL;
 216                 }
 217         }
 218         usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
 219
 220         return (0);
 221 }
 222
 223 static device_method_t ohci_methods[] = {
 224         /* Device interface */
 225         DEVMETHOD(device_probe, ohci_at91_fdt_probe),
 226         DEVMETHOD(device_attach, ohci_at91_fdt_attach),
 227         DEVMETHOD(device_detach, ohci_at91_fdt_detach),
 228         DEVMETHOD(device_suspend, bus_generic_suspend),
 229         DEVMETHOD(device_resume, bus_generic_resume),
 230         DEVMETHOD(device_shutdown, bus_generic_shutdown),
 231
 232         DEVMETHOD_END
 233 };
 234
 235 static driver_t ohci_driver = {
 236         .name = "ohci",
 237         .methods = ohci_methods,
 238         .size = sizeof(struct at91_ohci_softc),
 239 };
 240
 241 static devclass_t ohci_devclass;
 242
 243 DRIVER_MODULE(ohci, simplebus, ohci_driver, ohci_devclass, 0, 0);
 244 MODULE_DEPEND(ohci, usb, 1, 1, 1);