bhnd_ehci.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
    5  * Copyright (c) 2010, Aleksandr Rybalko <ray@ddteam.net>
    6  * All rights reserved.
    7  *
    8  * Developed by Semihalf.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. Neither the name of MARVELL nor the names of contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 /*
   39  * BHND attachment driver for the USB Enhanced Host Controller.
   40  * Ported from ZRouter with insignificant adaptations for FreeBSD11.
   41  */
   42 
   43 #include "opt_bus.h"
   44 
   45 #include <sys/stdint.h>
   46 #include <sys/stddef.h>
   47 #include <sys/param.h>
   48 #include <sys/queue.h>
   49 #include <sys/rman.h>
   50 #include <sys/types.h>
   51 #include <sys/systm.h>
   52 #include <sys/kernel.h>
   53 #include <sys/bus.h>
   54 #include <sys/linker_set.h>
   55 #include <sys/module.h>
   56 #include <sys/lock.h>
   57 #include <sys/mutex.h>
   58 #include <sys/condvar.h>
   59 #include <sys/sysctl.h>
   60 #include <sys/sx.h>
   61 #include <sys/unistd.h>
   62 #include <sys/callout.h>
   63 #include <sys/malloc.h>
   64 #include <sys/priv.h>
   65 
   66 #include <dev/usb/usb.h>
   67 #include <dev/usb/usbdi.h>
   68 
   69 #include <dev/usb/usb_core.h>
   70 #include <dev/usb/usb_busdma.h>
   71 #include <dev/usb/usb_process.h>
   72 #include <dev/usb/usb_util.h>
   73 
   74 #include <dev/usb/usb_controller.h>
   75 #include <dev/usb/usb_bus.h>
   76 #include <dev/usb/controller/ehci.h>
   77 #include <dev/usb/controller/ehcireg.h>
   78 
   79 #include <dev/bhnd/bhnd.h>
   80 
   81 #define EHCI_HC_DEVSTR          "Broadcom EHCI"
   82 
   83 #define USB_BRIDGE_INTR_CAUSE   0x210
   84 #define USB_BRIDGE_INTR_MASK    0x214
   85 
   86 static device_attach_t  bhnd_ehci_attach;
   87 static device_detach_t  bhnd_ehci_detach;
   88 
   89 static int              bhnd_ehci_probe(device_t self);
   90 static void             bhnd_ehci_post_reset(struct ehci_softc *ehci_softc);
   91 
   92 static int
   93 bhnd_ehci_probe(device_t self)
   94 {
   95 
   96         device_set_desc(self, EHCI_HC_DEVSTR);
   97 
   98         return (BUS_PROBE_DEFAULT);
   99 }
  100 
  101 static void
  102 bhnd_ehci_post_reset(struct ehci_softc *ehci_softc)
  103 {
  104         uint32_t        usbmode;
  105 
  106         /* Force HOST mode */
  107         usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_NOLPM);
  108         usbmode &= ~EHCI_UM_CM;
  109         usbmode |= EHCI_UM_CM_HOST;
  110         EOWRITE4(ehci_softc, EHCI_USBMODE_NOLPM, usbmode);
  111 }
  112 
  113 static int
  114 bhnd_ehci_attach(device_t self)
  115 {
  116         ehci_softc_t    *sc;
  117         int              err;
  118         int              rid;
  119 
  120         sc = device_get_softc(self);
  121         /* initialise some bus fields */
  122         sc->sc_bus.parent = self;
  123         sc->sc_bus.devices = sc->sc_devices;
  124         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  125         sc->sc_bus.usbrev = USB_REV_2_0;
  126         sc->sc_bus.dma_bits = 32;
  127 
  128         /* get all DMA memory */
  129         if ((err = usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(self),
  130             &ehci_iterate_hw_softc)) != 0) {
  131                 BHND_ERROR_DEV(self, "can't allocate DMA memory: %d", err);
  132                 return (ENOMEM);
  133         }
  134 
  135         rid = 0;
  136         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, 
  137             RF_ACTIVE);
  138         if (!sc->sc_io_res) {
  139                 BHND_ERROR_DEV(self, "Could not map memory");
  140                 goto error;
  141         }
  142         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
  143         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
  144         sc->sc_io_size = rman_get_size(sc->sc_io_res);
  145 
  146         rid = 0;
  147         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  148             RF_SHAREABLE | RF_ACTIVE);
  149 
  150         if (sc->sc_irq_res == NULL) {
  151                 BHND_ERROR_DEV(self, "Could not allocate error irq");
  152                 bhnd_ehci_detach(self);
  153                 return (ENXIO);
  154         }
  155 
  156         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  157         if (!sc->sc_bus.bdev) {
  158                 BHND_ERROR_DEV(self, "Could not add USB device");
  159                 goto error;
  160         }
  161         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  162         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  163 
  164         sprintf(sc->sc_vendor, "Broadcom");
  165 
  166         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  167             NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  168         if (err) {
  169                 BHND_ERROR_DEV(self, "Could not setup irq, %d", err);
  170                 sc->sc_intr_hdl = NULL;
  171                 goto error;
  172         }
  173 
  174         sc->sc_flags |= EHCI_SCFLG_LOSTINTRBUG;
  175         sc->sc_vendor_post_reset = bhnd_ehci_post_reset;
  176 
  177         err = ehci_init(sc);
  178         if (!err) {
  179                 err = device_probe_and_attach(sc->sc_bus.bdev);
  180         }
  181         if (err) {
  182                 BHND_ERROR_DEV(self, "USB init failed err=%d", err);
  183                 goto error;
  184         }
  185         return (0);
  186 
  187 error:
  188         bhnd_ehci_detach(self);
  189         return (ENXIO);
  190 }
  191 
  192 static int
  193 bhnd_ehci_detach(device_t self)
  194 {
  195         ehci_softc_t    *sc;
  196         int              err;
  197 
  198         sc = device_get_softc(self);
  199 
  200         /* during module unload there are lots of children leftover */
  201         device_delete_children(self);
  202 
  203         /*
  204          * disable interrupts that might have been switched on in ehci_init
  205          */
  206 #ifdef notyet
  207         if (sc->sc_io_res) {
  208                 EWRITE4(sc, EHCI_USBINTR, 0);
  209                 EWRITE4(sc, USB_BRIDGE_INTR_MASK, 0);
  210         }
  211 #endif
  212         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  213                 /*
  214                  * only call ehci_detach() after ehci_init()
  215                  */
  216                 ehci_detach(sc);
  217 
  218                 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  219 
  220                 if (err)
  221                         /* XXX or should we panic? */
  222                         BHND_ERROR_DEV(self, "Could not tear down irq, %d", err);
  223 
  224                 sc->sc_intr_hdl = NULL;
  225         }
  226         if (sc->sc_irq_res) {
  227                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
  228                 sc->sc_irq_res = NULL;
  229         }
  230         if (sc->sc_io_res) {
  231                 bus_release_resource(self, SYS_RES_MEMORY, 0, sc->sc_io_res);
  232                 sc->sc_io_res = NULL;
  233         }
  234         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  235 
  236         return (0);
  237 }
  238 
  239 static device_method_t ehci_methods[] = {
  240         /* Device interface */
  241         DEVMETHOD(device_probe,         bhnd_ehci_probe),
  242         DEVMETHOD(device_attach,        bhnd_ehci_attach),
  243         DEVMETHOD(device_detach,        bhnd_ehci_detach),
  244         DEVMETHOD(device_suspend,       bus_generic_suspend),
  245         DEVMETHOD(device_resume,        bus_generic_resume),
  246         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  247 
  248         /* Bus interface */
  249         DEVMETHOD(bus_print_child,      bus_generic_print_child),
  250         {0, 0}
  251 };
  252 
  253 static driver_t ehci_driver = {
  254         "ehci",
  255         ehci_methods,
  256         sizeof(ehci_softc_t),
  257 };
  258 
  259 DRIVER_MODULE(ehci, bhnd_usb, ehci_driver, 0, 0);
  260 MODULE_DEPEND(ehci, usb, 1, 1, 1);

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FreeBSD/Linux Kernel Cross Reference sys/dev/bhnd/cores/usb/bhnd_ehci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/bhnd/cores/usb/bhnd_ehci.c