The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/mediatek/mtk_ehci.c

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    1 #include <sys/cdefs.h>
    2 __FBSDID("$FreeBSD: stable/12/sys/mips/mediatek/mtk_ehci.c 307518 2016-10-17 10:20:38Z hselasky $");
    3 
    4 /*-
    5  * Copyright (c) 2015 Stanislav Galabov. All rights reserved.
    6  * Copyright (c) 2010,2011 Aleksandr Rybalko. All rights reserved.
    7  * Copyright (c) 2007-2008 Hans Petter Selasky. All rights reserved.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  */
   30 
   31 #include <sys/stdint.h>
   32 #include <sys/stddef.h>
   33 #include <sys/param.h>
   34 #include <sys/queue.h>
   35 #include <sys/types.h>
   36 #include <sys/systm.h>
   37 #include <sys/kernel.h>
   38 #include <sys/bus.h>
   39 #include <sys/module.h>
   40 #include <sys/lock.h>
   41 #include <sys/mutex.h>
   42 #include <sys/condvar.h>
   43 #include <sys/sysctl.h>
   44 #include <sys/sx.h>
   45 #include <sys/unistd.h>
   46 #include <sys/callout.h>
   47 #include <sys/malloc.h>
   48 #include <sys/priv.h>
   49 #include <sys/rman.h>
   50 
   51 #include <dev/usb/usb.h>
   52 #include <dev/usb/usbdi.h>
   53 
   54 #include <dev/usb/usb_core.h>
   55 #include <dev/usb/usb_busdma.h>
   56 #include <dev/usb/usb_process.h>
   57 #include <dev/usb/usb_util.h>
   58 
   59 #include <dev/usb/usb_controller.h>
   60 #include <dev/usb/usb_bus.h>
   61 
   62 #include <dev/usb/controller/ehci.h>
   63 
   64 #include <dev/ofw/openfirm.h>
   65 #include <dev/ofw/ofw_bus.h>
   66 #include <dev/ofw/ofw_bus_subr.h>
   67 
   68 #define EHCI_HC_DEVSTR  "MTK USB 2.0 Controller"
   69 
   70 static device_probe_t ehci_fdt_probe;
   71 static device_attach_t ehci_fdt_attach;
   72 static device_detach_t ehci_fdt_detach;
   73 
   74 static int
   75 ehci_fdt_probe(device_t self)
   76 {
   77 
   78         if (!ofw_bus_status_okay(self))
   79                 return (ENXIO);
   80 
   81         if (!ofw_bus_is_compatible(self, "generic-ehci"))
   82                 return (ENXIO);
   83 
   84         device_set_desc(self, EHCI_HC_DEVSTR);
   85 
   86         return (BUS_PROBE_DEFAULT);
   87 }
   88 
   89 static int
   90 ehci_fdt_attach(device_t self)
   91 {
   92         ehci_softc_t *sc = device_get_softc(self);
   93         int err;
   94         int rid;
   95 
   96         /* initialise some bus fields */
   97         sc->sc_bus.parent = self;
   98         sc->sc_bus.devices = sc->sc_devices;
   99         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  100         sc->sc_bus.dma_bits = 32;
  101 
  102         /* get all DMA memory */
  103         if (usb_bus_mem_alloc_all(&sc->sc_bus,
  104             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
  105                 printf("No mem\n");
  106                 return (ENOMEM);
  107         }
  108 
  109         rid = 0;
  110         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
  111                                 RF_ACTIVE);
  112         if (!sc->sc_io_res) {
  113                 device_printf(self, "Could not map memory\n");
  114                 goto error;
  115         }
  116         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
  117         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
  118         sc->sc_io_size = rman_get_size(sc->sc_io_res);
  119 
  120         rid = 0;
  121         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  122                 RF_SHAREABLE | RF_ACTIVE);
  123         if (sc->sc_irq_res == NULL) {
  124                 device_printf(self, "Could not allocate irq\n");
  125                 goto error;
  126         }
  127 
  128         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  129         if (!(sc->sc_bus.bdev)) {
  130                 device_printf(self, "Could not add USB device\n");
  131                 goto error;
  132         }
  133         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  134         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  135 
  136         sprintf(sc->sc_vendor, "MediaTek");
  137 
  138         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  139                 NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  140         if (err) {
  141                 device_printf(self, "Could not setup irq, %d\n", err);
  142                 sc->sc_intr_hdl = NULL;
  143                 goto error;
  144         }
  145 
  146         err = ehci_init(sc);
  147         if (!err) {
  148                 err = device_probe_and_attach(sc->sc_bus.bdev);
  149         }
  150         if (err) {
  151                 device_printf(self, "USB init failed err=%d\n", err);
  152                 goto error;
  153         }
  154         return (0);
  155 
  156 error:
  157         ehci_fdt_detach(self);
  158         return (ENXIO);
  159 }
  160 
  161 static int
  162 ehci_fdt_detach(device_t self)
  163 {
  164         ehci_softc_t *sc = device_get_softc(self);
  165         int err;
  166 
  167         /* during module unload there are lots of children leftover */
  168         device_delete_children(self);
  169 
  170         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  171                 /*
  172                  * only call ehci_detach() after ehci_init()
  173                  */
  174                 ehci_detach(sc);
  175 
  176                 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  177                 if (err)
  178                         device_printf(self, "Could not tear down irq, %d\n",
  179                                 err);
  180                 sc->sc_intr_hdl = NULL;
  181         }
  182         if (sc->sc_irq_res) {
  183                 bus_release_resource(self, SYS_RES_IRQ, 0,
  184                     sc->sc_irq_res);
  185                 sc->sc_irq_res = NULL;
  186         }
  187         if (sc->sc_io_res) {
  188                 bus_release_resource(self, SYS_RES_MEMORY, 0,
  189                     sc->sc_io_res);
  190                 sc->sc_io_res = NULL;
  191         }
  192         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  193 
  194         return (0);
  195 }
  196 
  197 static device_method_t ehci_fdt_methods[] = {
  198         /* Device interface */
  199         DEVMETHOD(device_probe, ehci_fdt_probe),
  200         DEVMETHOD(device_attach, ehci_fdt_attach),
  201         DEVMETHOD(device_detach, ehci_fdt_detach),
  202         DEVMETHOD(device_suspend, bus_generic_suspend),
  203         DEVMETHOD(device_resume, bus_generic_resume),
  204         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  205 
  206         DEVMETHOD_END
  207 };
  208 
  209 static driver_t ehci_fdt_driver = {
  210         .name = "ehci",
  211         .methods = ehci_fdt_methods,
  212         .size = sizeof(ehci_softc_t),
  213 };
  214 
  215 static devclass_t ehci_fdt_devclass;
  216 
  217 DRIVER_MODULE(ehci, simplebus, ehci_fdt_driver, ehci_fdt_devclass, 0, 0);

Cache object: f9d2cd363a2d05a78c9fd35be697678c


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