ar71xx_ehci.c

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    1 /*-
    2  * Copyright (c) 2008 Sam Leffler.  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 /*
   26  * AR71XX attachment driver for the USB Enhanced Host Controller.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/9.0/sys/mips/atheros/ar71xx_ehci.c 220558 2011-04-12 07:49:11Z hselasky $");
   31 
   32 #include "opt_bus.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/bus.h>
   37 #include <sys/rman.h>
   38 #include <sys/condvar.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 
   42 #include <machine/bus.h>
   43 
   44 #include <dev/usb/usb.h>
   45 #include <dev/usb/usbdi.h>
   46 
   47 #include <dev/usb/usb_core.h>
   48 #include <dev/usb/usb_busdma.h>
   49 #include <dev/usb/usb_process.h>
   50 #include <dev/usb/usb_util.h>
   51 
   52 #include <dev/usb/usb_controller.h>
   53 #include <dev/usb/usb_bus.h>
   54 #include <dev/usb/controller/ehci.h>
   55 #include <dev/usb/controller/ehcireg.h>
   56 
   57 #include <mips/atheros/ar71xx_setup.h>
   58 #include <mips/atheros/ar71xx_bus_space_reversed.h>
   59 
   60 #define EHCI_HC_DEVSTR          "AR71XX Integrated USB 2.0 controller"
   61 
   62 struct ar71xx_ehci_softc {
   63         ehci_softc_t            base;   /* storage for EHCI code */
   64 };
   65 
   66 static device_attach_t ar71xx_ehci_attach;
   67 static device_detach_t ar71xx_ehci_detach;
   68 static device_shutdown_t ar71xx_ehci_shutdown;
   69 static device_suspend_t ar71xx_ehci_suspend;
   70 static device_resume_t ar71xx_ehci_resume;
   71 
   72 bs_r_1_proto(reversed);
   73 bs_w_1_proto(reversed);
   74 
   75 static int
   76 ar71xx_ehci_suspend(device_t self)
   77 {
   78         ehci_softc_t *sc = device_get_softc(self);
   79         int err;
   80 
   81         err = bus_generic_suspend(self);
   82         if (err)
   83                 return (err);
   84         ehci_suspend(sc);
   85         return (0);
   86 }
   87 
   88 static int
   89 ar71xx_ehci_resume(device_t self)
   90 {
   91         ehci_softc_t *sc = device_get_softc(self);
   92 
   93         ehci_resume(sc);
   94 
   95         bus_generic_resume(self);
   96 
   97         return (0);
   98 }
   99 
  100 static int
  101 ar71xx_ehci_shutdown(device_t self)
  102 {
  103         ehci_softc_t *sc = device_get_softc(self);
  104         int err;
  105 
  106         err = bus_generic_shutdown(self);
  107         if (err)
  108                 return (err);
  109         ehci_shutdown(sc);
  110 
  111         return (0);
  112 }
  113 
  114 static int
  115 ar71xx_ehci_probe(device_t self)
  116 {
  117 
  118         device_set_desc(self, EHCI_HC_DEVSTR);
  119 
  120         return (BUS_PROBE_DEFAULT);
  121 }
  122 
  123 static int
  124 ar71xx_ehci_attach(device_t self)
  125 {
  126         struct ar71xx_ehci_softc *isc = device_get_softc(self);
  127         ehci_softc_t *sc = &isc->base;
  128         int err;
  129         int rid;
  130 
  131         /* initialise some bus fields */
  132         sc->sc_bus.parent = self;
  133         sc->sc_bus.devices = sc->sc_devices;
  134         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  135 
  136         /* get all DMA memory */
  137         if (usb_bus_mem_alloc_all(&sc->sc_bus,
  138             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
  139                 return (ENOMEM);
  140         }
  141 
  142         sc->sc_bus.usbrev = USB_REV_2_0;
  143 
  144         /* NB: hints fix the memory location and irq */
  145 
  146         rid = 0;
  147         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  148         if (!sc->sc_io_res) {
  149                 device_printf(self, "Could not map memory\n");
  150                 goto error;
  151         }
  152 
  153         /*
  154          * Craft special resource for bus space ops that handle
  155          * byte-alignment of non-word addresses.  
  156          */
  157         sc->sc_io_tag = ar71xx_bus_space_reversed;
  158         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
  159         sc->sc_io_size = rman_get_size(sc->sc_io_res);
  160 
  161         rid = 0;
  162         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
  163             RF_ACTIVE);
  164         if (sc->sc_irq_res == NULL) {
  165                 device_printf(self, "Could not allocate irq\n");
  166                 goto error;
  167         }
  168         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  169         if (!sc->sc_bus.bdev) {
  170                 device_printf(self, "Could not add USB device\n");
  171                 goto error;
  172         }
  173         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  174         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  175 
  176         sprintf(sc->sc_vendor, "Atheros");
  177 
  178 
  179         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  180             NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
  181         if (err) {
  182                 device_printf(self, "Could not setup irq, %d\n", err);
  183                 sc->sc_intr_hdl = NULL;
  184                 goto error;
  185         }
  186 
  187         /*
  188          * Arrange to force Host mode, select big-endian byte alignment,
  189          * and arrange to not terminate reset operations (the adapter
  190          * will ignore it if we do but might as well save a reg write).
  191          * Also, the controller has an embedded Transaction Translator
  192          * which means port speed must be read from the Port Status
  193          * register following a port enable.
  194          */
  195         sc->sc_flags = EHCI_SCFLG_SETMODE;
  196 
  197         switch (ar71xx_soc) {
  198                 case AR71XX_SOC_AR7241:
  199                 case AR71XX_SOC_AR7242:
  200                 case AR71XX_SOC_AR9130:
  201                 case AR71XX_SOC_AR9132:
  202                         sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
  203                         break;
  204                 default:
  205                         /* fallthrough */
  206                         break;
  207         }
  208 
  209         /*
  210          * ehci_reset() needs the correct offset to access the host controller
  211          * registers. The AR724x/AR913x offsets aren't 0.
  212         */
  213         sc->sc_offs = EHCI_CAPLENGTH(EREAD4(sc, EHCI_CAPLEN_HCIVERSION));
  214 
  215 
  216         (void) ehci_reset(sc);
  217 
  218         err = ehci_init(sc);
  219         if (!err) {
  220                 err = device_probe_and_attach(sc->sc_bus.bdev);
  221         }
  222         if (err) {
  223                 device_printf(self, "USB init failed err=%d\n", err);
  224                 goto error;
  225         }
  226         return (0);
  227 
  228 error:
  229         ar71xx_ehci_detach(self);
  230         return (ENXIO);
  231 }
  232 
  233 static int
  234 ar71xx_ehci_detach(device_t self)
  235 {
  236         struct ar71xx_ehci_softc *isc = device_get_softc(self);
  237         ehci_softc_t *sc = &isc->base;
  238         device_t bdev;
  239         int err;
  240 
  241         if (sc->sc_bus.bdev) {
  242                 bdev = sc->sc_bus.bdev;
  243                 device_detach(bdev);
  244                 device_delete_child(self, bdev);
  245         }
  246         /* during module unload there are lots of children leftover */
  247         device_delete_all_children(self);
  248 
  249         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  250                 /*
  251                  * only call ehci_detach() after ehci_init()
  252                  */
  253                 ehci_detach(sc);
  254 
  255                 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  256 
  257                 if (err)
  258                         /* XXX or should we panic? */
  259                         device_printf(self, "Could not tear down irq, %d\n",
  260                             err);
  261                 sc->sc_intr_hdl = NULL;
  262         }
  263 
  264         if (sc->sc_irq_res) {
  265                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
  266                 sc->sc_irq_res = NULL;
  267         }
  268         if (sc->sc_io_res) {
  269                 bus_release_resource(self, SYS_RES_MEMORY, 0,
  270                     sc->sc_io_res);
  271                 sc->sc_io_res = NULL;
  272         }
  273         usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
  274 
  275         return (0);
  276 }
  277 
  278 static device_method_t ehci_methods[] = {
  279         /* Device interface */
  280         DEVMETHOD(device_probe, ar71xx_ehci_probe),
  281         DEVMETHOD(device_attach, ar71xx_ehci_attach),
  282         DEVMETHOD(device_detach, ar71xx_ehci_detach),
  283         DEVMETHOD(device_suspend, ar71xx_ehci_suspend),
  284         DEVMETHOD(device_resume, ar71xx_ehci_resume),
  285         DEVMETHOD(device_shutdown, ar71xx_ehci_shutdown),
  286 
  287         /* Bus interface */
  288         DEVMETHOD(bus_print_child, bus_generic_print_child),
  289 
  290         {0, 0}
  291 };
  292 
  293 static driver_t ehci_driver = {
  294         "ehci",
  295         ehci_methods,
  296         sizeof(struct ar71xx_ehci_softc),
  297 };
  298 
  299 static devclass_t ehci_devclass;
  300 
  301 DRIVER_MODULE(ehci, nexus, ehci_driver, ehci_devclass, 0, 0);
  302 MODULE_DEPEND(ehci, usb, 1, 1, 1);

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FreeBSD/Linux Kernel Cross Reference sys/mips/atheros/ar71xx_ehci.c

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sys/mips/atheros/ar71xx_ehci.c