ehci_msm.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2018 Ruslan Bukin <br@bsdpad.com>
    5  * All rights reserved.
    6  *
    7  * This software was developed by BAE Systems, the University of Cambridge
    8  * Computer Laboratory, and Memorial University under DARPA/AFRL contract
    9  * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
   10  * (TC) research program.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD$");
   36 
   37 #include "opt_bus.h"
   38 
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/bus.h>
   42 #include <sys/rman.h>
   43 #include <sys/condvar.h>
   44 #include <sys/kernel.h>
   45 #include <sys/module.h>
   46 
   47 #include <dev/ofw/ofw_bus.h>
   48 #include <dev/ofw/ofw_bus_subr.h>
   49 
   50 #include <dev/usb/usb.h>
   51 #include <dev/usb/usbdi.h>
   52 
   53 #include <dev/usb/usb_core.h>
   54 #include <dev/usb/usb_busdma.h>
   55 #include <dev/usb/usb_process.h>
   56 #include <dev/usb/usb_util.h>
   57 
   58 #include <dev/usb/usb_controller.h>
   59 #include <dev/usb/usb_bus.h>
   60 #include <dev/usb/controller/ehci.h>
   61 #include <dev/usb/controller/ehcireg.h>
   62 
   63 struct ehci_msm_softc {
   64         ehci_softc_t            base;
   65         struct resource         *res[3];
   66 };
   67 
   68 static struct resource_spec ehci_msm_spec[] = {
   69         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   70         { SYS_RES_MEMORY,       1,      RF_ACTIVE },
   71         { SYS_RES_IRQ,          0,      RF_ACTIVE },
   72         { -1, 0 }
   73 };
   74 
   75 #define EHCI_HC_DEVSTR          "Qualcomm USB 2.0 controller"
   76 
   77 static device_attach_t ehci_msm_attach;
   78 static device_detach_t ehci_msm_detach;
   79 
   80 static int
   81 ehci_msm_probe(device_t dev)
   82 {
   83 
   84         if (!ofw_bus_is_compatible(dev, "qcom,ci-hdrc"))
   85                 return (ENXIO);
   86 
   87         device_set_desc(dev, EHCI_HC_DEVSTR);
   88 
   89         return (BUS_PROBE_DEFAULT);
   90 }
   91 
   92 static int
   93 ehci_msm_attach(device_t dev)
   94 {
   95         struct ehci_msm_softc *esc;
   96         bus_space_handle_t bsh;
   97         ehci_softc_t *sc;
   98         int err;
   99 
  100         esc = device_get_softc(dev);
  101         sc = &esc->base;
  102         sc->sc_bus.parent = dev;
  103         sc->sc_bus.devices = sc->sc_devices;
  104         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  105         sc->sc_bus.dma_bits = 32;
  106 
  107         if (bus_alloc_resources(dev, ehci_msm_spec, esc->res)) {
  108                 device_printf(dev, "could not allocate resources\n");
  109                 return (ENXIO);
  110         }
  111 
  112         sc->sc_io_tag = rman_get_bustag(esc->res[0]);
  113 
  114         /* Get all DMA memory */
  115         if (usb_bus_mem_alloc_all(&sc->sc_bus,
  116             USB_GET_DMA_TAG(dev), &ehci_iterate_hw_softc)) {
  117                 return (ENOMEM);
  118         }
  119 
  120         /* EHCI registers */
  121         sc->sc_io_tag = rman_get_bustag(esc->res[0]);
  122         bsh = rman_get_bushandle(esc->res[0]);
  123         sc->sc_io_size = rman_get_size(esc->res[0]);
  124 
  125         if (bus_space_subregion(sc->sc_io_tag, bsh, 0x100,
  126             sc->sc_io_size, &sc->sc_io_hdl) != 0)
  127                 panic("%s: unable to subregion USB host registers",
  128                     device_get_name(dev));
  129 
  130         sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
  131         if (!sc->sc_bus.bdev) {
  132                 device_printf(dev, "Could not add USB device\n");
  133                 goto error;
  134         }
  135         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  136         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  137 
  138         sprintf(sc->sc_vendor, "Qualcomm");
  139 
  140         err = bus_setup_intr(dev, esc->res[2], INTR_TYPE_BIO | INTR_MPSAFE,
  141             NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  142         if (err) {
  143                 device_printf(dev, "Could not setup irq, %d\n", err);
  144                 sc->sc_intr_hdl = NULL;
  145                 goto error;
  146         }
  147 
  148         sc->sc_flags |= EHCI_SCFLG_DONTRESET | EHCI_SCFLG_NORESTERM;
  149 
  150         err = ehci_init(sc);
  151         if (!err) {
  152                 sc->sc_flags |= EHCI_SCFLG_DONEINIT;
  153                 err = device_probe_and_attach(sc->sc_bus.bdev);
  154         }
  155 
  156         if (err) {
  157                 device_printf(dev, "USB init failed err=%d\n", err);
  158                 goto error;
  159         }
  160         return (0);
  161 
  162 error:
  163         ehci_msm_detach(dev);
  164         return (ENXIO);
  165 }
  166 
  167 static int
  168 ehci_msm_detach(device_t dev)
  169 {
  170         ehci_softc_t *sc;
  171         device_t bdev;
  172         int err;
  173 
  174         sc = device_get_softc(dev);
  175 
  176         if (sc->sc_bus.bdev) {
  177                 bdev = sc->sc_bus.bdev;
  178                 device_detach(bdev);
  179                 device_delete_child(dev, bdev);
  180         }
  181 
  182         device_delete_children(dev);
  183 
  184         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  185                 /* only call ehci_detach() after ehci_init() */
  186                 ehci_detach(sc);
  187 
  188                 err = bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intr_hdl);
  189                 if (err)
  190                         device_printf(dev, "Could not tear down irq, %d\n",
  191                             err);
  192                 sc->sc_intr_hdl = NULL;
  193         }
  194 
  195         if (sc->sc_irq_res) {
  196                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
  197                 sc->sc_irq_res = NULL;
  198         }
  199         if (sc->sc_io_res) {
  200                 bus_release_resource(dev, SYS_RES_MEMORY, 0,
  201                     sc->sc_io_res);
  202                 sc->sc_io_res = NULL;
  203         }
  204 
  205         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  206 
  207         return (0);
  208 }
  209 
  210 static device_method_t ehci_methods[] = {
  211         /* Device interface */
  212         DEVMETHOD(device_probe,         ehci_msm_probe),
  213         DEVMETHOD(device_attach,        ehci_msm_attach),
  214         DEVMETHOD(device_detach,        ehci_msm_detach),
  215         DEVMETHOD(device_suspend,       bus_generic_suspend),
  216         DEVMETHOD(device_resume,        bus_generic_resume),
  217         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  218         DEVMETHOD_END
  219 };
  220 
  221 static driver_t ehci_driver = {
  222         .name = "ehci",
  223         .methods = ehci_methods,
  224         .size = sizeof(ehci_softc_t),
  225 };
  226 
  227 DRIVER_MODULE(ehci_msm, simplebus, ehci_driver, 0, 0);
  228 MODULE_DEPEND(ehci_msm, usb, 1, 1, 1);

Cache object: 4a2ad24c5f8a592d50058e01ba8d184f

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

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