dwc_otg_fdt.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2012 Hans Petter Selasky.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/bus.h>
   34 #include <sys/condvar.h>
   35 #include <sys/kernel.h>
   36 #include <sys/lock.h>
   37 #include <sys/malloc.h>
   38 #include <sys/module.h>
   39 #include <sys/mutex.h>
   40 #include <sys/rman.h>
   41 
   42 #include <dev/ofw/openfirm.h>
   43 #include <dev/ofw/ofw_bus.h>
   44 #include <dev/ofw/ofw_bus_subr.h>
   45 
   46 #include <dev/usb/usb.h>
   47 #include <dev/usb/usbdi.h>
   48 
   49 #include <dev/usb/usb_core.h>
   50 #include <dev/usb/usb_busdma.h>
   51 #include <dev/usb/usb_process.h>
   52 #include <dev/usb/usb_util.h>
   53 
   54 #include <dev/usb/usb_controller.h>
   55 #include <dev/usb/usb_bus.h>
   56 
   57 #include <dev/usb/controller/dwc_otg.h>
   58 #include <dev/usb/controller/dwc_otg_fdt.h>
   59 
   60 static device_probe_t dwc_otg_probe;
   61 
   62 static struct ofw_compat_data compat_data[] = {
   63         { "synopsys,designware-hs-otg2",        1 },
   64         { "snps,dwc2",                          1 },
   65         { NULL,                                 0 }
   66 };
   67 
   68 static int
   69 dwc_otg_probe(device_t dev)
   70 {
   71 
   72         if (!ofw_bus_status_okay(dev))
   73                 return (ENXIO);
   74 
   75         if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
   76                 return (ENXIO);
   77 
   78         device_set_desc(dev, "DWC OTG 2.0 integrated USB controller");
   79 
   80         return (BUS_PROBE_DEFAULT);
   81 }
   82 
   83 static int
   84 dwc_otg_irq_index(device_t dev, int *rid)
   85 {
   86         int idx, rv;
   87         phandle_t node;
   88 
   89         node = ofw_bus_get_node(dev);
   90         rv = ofw_bus_find_string_index(node, "interrupt-names", "usb", &idx);
   91         if (rv != 0)
   92                 return (rv);
   93         *rid = idx;
   94         return (0);
   95 }
   96 
   97 int
   98 dwc_otg_attach(device_t dev)
   99 {
  100         struct dwc_otg_fdt_softc *sc = device_get_softc(dev);
  101         char usb_mode[24];
  102         int err;
  103         int rid;
  104 
  105         sc->sc_otg.sc_bus.parent = dev;
  106 
  107         /* get USB mode, if any */
  108         if (OF_getprop(ofw_bus_get_node(dev), "dr_mode",
  109             &usb_mode, sizeof(usb_mode)) > 0) {
  110                 /* ensure proper zero termination */
  111                 usb_mode[sizeof(usb_mode) - 1] = 0;
  112 
  113                 if (strcasecmp(usb_mode, "host") == 0)
  114                         sc->sc_otg.sc_mode = DWC_MODE_HOST;
  115                 else if (strcasecmp(usb_mode, "peripheral") == 0)
  116                         sc->sc_otg.sc_mode = DWC_MODE_DEVICE;
  117                 else if (strcasecmp(usb_mode, "otg") != 0) {
  118                         device_printf(dev, "Invalid FDT dr_mode: %s\n",
  119                             usb_mode);
  120                 }
  121         }
  122 
  123         rid = 0;
  124         sc->sc_otg.sc_io_res =
  125             bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  126 
  127         if (!(sc->sc_otg.sc_io_res))
  128                 goto error;
  129 
  130         /*
  131          * brcm,bcm2708-usb FDT provides two interrupts, we need only the USB
  132          * interrupt (VC_USB).  The latest FDT for it provides an
  133          * interrupt-names property and swapped them around, while older ones
  134          * did not have interrupt-names and put the usb interrupt in the second
  135          * position.  We'll attempt to use interrupt-names first with a fallback
  136          * to the old method of assuming the index based on the compatible
  137          * string.
  138          */
  139         if (dwc_otg_irq_index(dev, &rid) != 0)
  140                 rid = ofw_bus_is_compatible(dev, "brcm,bcm2708-usb") ? 1 : 0;
  141         sc->sc_otg.sc_irq_res =
  142             bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
  143         if (sc->sc_otg.sc_irq_res == NULL)
  144                 goto error;
  145 
  146         sc->sc_otg.sc_bus.bdev = device_add_child(dev, "usbus", -1);
  147         if (sc->sc_otg.sc_bus.bdev == NULL)
  148                 goto error;
  149 
  150         err = dwc_otg_init(&sc->sc_otg);
  151         if (err == 0) {
  152                 err = device_probe_and_attach(sc->sc_otg.sc_bus.bdev);
  153         }
  154         if (err)
  155                 goto error;
  156 
  157         return (0);
  158 
  159 error:
  160         dwc_otg_detach(dev);
  161         return (ENXIO);
  162 }
  163 
  164 int
  165 dwc_otg_detach(device_t dev)
  166 {
  167         struct dwc_otg_fdt_softc *sc = device_get_softc(dev);
  168 
  169         /* during module unload there are lots of children leftover */
  170         device_delete_children(dev);
  171 
  172         if (sc->sc_otg.sc_irq_res && sc->sc_otg.sc_intr_hdl) {
  173                 /*
  174                  * only call dwc_otg_uninit() after dwc_otg_init()
  175                  */
  176                 dwc_otg_uninit(&sc->sc_otg);
  177 
  178                 bus_teardown_intr(dev, sc->sc_otg.sc_irq_res,
  179                     sc->sc_otg.sc_intr_hdl);
  180                 sc->sc_otg.sc_intr_hdl = NULL;
  181         }
  182         /* free IRQ channel, if any */
  183         if (sc->sc_otg.sc_irq_res) {
  184                 bus_release_resource(dev, SYS_RES_IRQ, 0,
  185                     sc->sc_otg.sc_irq_res);
  186                 sc->sc_otg.sc_irq_res = NULL;
  187         }
  188         /* free memory resource, if any */
  189         if (sc->sc_otg.sc_io_res) {
  190                 bus_release_resource(dev, SYS_RES_MEMORY, 0,
  191                     sc->sc_otg.sc_io_res);
  192                 sc->sc_otg.sc_io_res = NULL;
  193         }
  194         usb_bus_mem_free_all(&sc->sc_otg.sc_bus, NULL);
  195 
  196         return (0);
  197 }
  198 
  199 static device_method_t dwc_otg_methods[] = {
  200         /* Device interface */
  201         DEVMETHOD(device_probe, dwc_otg_probe),
  202         DEVMETHOD(device_attach, dwc_otg_attach),
  203         DEVMETHOD(device_detach, dwc_otg_detach),
  204         DEVMETHOD(device_suspend, bus_generic_suspend),
  205         DEVMETHOD(device_resume, bus_generic_resume),
  206         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  207 
  208         DEVMETHOD_END
  209 };
  210 
  211 driver_t dwc_otg_driver = {
  212         .name = "dwcotg",
  213         .methods = dwc_otg_methods,
  214         .size = sizeof(struct dwc_otg_fdt_softc),
  215 };
  216 
  217 DRIVER_MODULE(dwcotg, simplebus, dwc_otg_driver, 0, 0);
  218 MODULE_DEPEND(dwcotg, usb, 1, 1, 1);

Cache object: 3e0ff15190440f953ce76eb97b91032e

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FreeBSD/Linux Kernel Cross Reference sys/dev/usb/controller/dwc_otg_fdt.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/controller/dwc_otg_fdt.c