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/10.3/sys/mips/atheros/ar71xx_ehci.c 278278 2015-02-05 20:03:02Z 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 
   69 bs_r_1_proto(reversed);
   70 bs_w_1_proto(reversed);
   71 
   72 static int
   73 ar71xx_ehci_probe(device_t self)
   74 {
   75 
   76         device_set_desc(self, EHCI_HC_DEVSTR);
   77 
   78         return (BUS_PROBE_NOWILDCARD);
   79 }
   80 
   81 static int
   82 ar71xx_ehci_attach(device_t self)
   83 {
   84         struct ar71xx_ehci_softc *isc = device_get_softc(self);
   85         ehci_softc_t *sc = &isc->base;
   86         int err;
   87         int rid;
   88 
   89         /* initialise some bus fields */
   90         sc->sc_bus.parent = self;
   91         sc->sc_bus.devices = sc->sc_devices;
   92         sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
   93         sc->sc_bus.dma_bits = 32;
   94 
   95         /* get all DMA memory */
   96         if (usb_bus_mem_alloc_all(&sc->sc_bus,
   97             USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
   98                 return (ENOMEM);
   99         }
  100 
  101         sc->sc_bus.usbrev = USB_REV_2_0;
  102 
  103         /* NB: hints fix the memory location and irq */
  104 
  105         rid = 0;
  106         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  107         if (!sc->sc_io_res) {
  108                 device_printf(self, "Could not map memory\n");
  109                 goto error;
  110         }
  111 
  112         /*
  113          * Craft special resource for bus space ops that handle
  114          * byte-alignment of non-word addresses.  
  115          */
  116         sc->sc_io_tag = ar71xx_bus_space_reversed;
  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_ACTIVE);
  123         if (sc->sc_irq_res == NULL) {
  124                 device_printf(self, "Could not allocate irq\n");
  125                 goto error;
  126         }
  127         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
  128         if (!sc->sc_bus.bdev) {
  129                 device_printf(self, "Could not add USB device\n");
  130                 goto error;
  131         }
  132         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
  133         device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
  134 
  135         sprintf(sc->sc_vendor, "Atheros");
  136 
  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         /*
  147          * Arrange to force Host mode, select big-endian byte alignment,
  148          * and arrange to not terminate reset operations (the adapter
  149          * will ignore it if we do but might as well save a reg write).
  150          * Also, the controller has an embedded Transaction Translator
  151          * which means port speed must be read from the Port Status
  152          * register following a port enable.
  153          */
  154         sc->sc_flags = EHCI_SCFLG_SETMODE;
  155 
  156         switch (ar71xx_soc) {
  157                 case AR71XX_SOC_AR7241:
  158                 case AR71XX_SOC_AR7242:
  159                 case AR71XX_SOC_AR9130:
  160                 case AR71XX_SOC_AR9132:
  161                 case AR71XX_SOC_AR9330:
  162                 case AR71XX_SOC_AR9331:
  163                         sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
  164                         break;
  165                 default:
  166                         /* fallthrough */
  167                         break;
  168         }
  169 
  170         /*
  171          * ehci_reset() needs the correct offset to access the host controller
  172          * registers. The AR724x/AR913x offsets aren't 0.
  173         */
  174         sc->sc_offs = EHCI_CAPLENGTH(EREAD4(sc, EHCI_CAPLEN_HCIVERSION));
  175 
  176 
  177         (void) ehci_reset(sc);
  178 
  179         err = ehci_init(sc);
  180         if (!err) {
  181                 err = device_probe_and_attach(sc->sc_bus.bdev);
  182         }
  183         if (err) {
  184                 device_printf(self, "USB init failed err=%d\n", err);
  185                 goto error;
  186         }
  187         return (0);
  188 
  189 error:
  190         ar71xx_ehci_detach(self);
  191         return (ENXIO);
  192 }
  193 
  194 static int
  195 ar71xx_ehci_detach(device_t self)
  196 {
  197         struct ar71xx_ehci_softc *isc = device_get_softc(self);
  198         ehci_softc_t *sc = &isc->base;
  199         device_t bdev;
  200         int err;
  201 
  202         if (sc->sc_bus.bdev) {
  203                 bdev = sc->sc_bus.bdev;
  204                 device_detach(bdev);
  205                 device_delete_child(self, bdev);
  206         }
  207         /* during module unload there are lots of children leftover */
  208         device_delete_children(self);
  209 
  210         if (sc->sc_irq_res && sc->sc_intr_hdl) {
  211                 /*
  212                  * only call ehci_detach() after ehci_init()
  213                  */
  214                 ehci_detach(sc);
  215 
  216                 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
  217 
  218                 if (err)
  219                         /* XXX or should we panic? */
  220                         device_printf(self, "Could not tear down irq, %d\n",
  221                             err);
  222                 sc->sc_intr_hdl = NULL;
  223         }
  224 
  225         if (sc->sc_irq_res) {
  226                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
  227                 sc->sc_irq_res = NULL;
  228         }
  229         if (sc->sc_io_res) {
  230                 bus_release_resource(self, SYS_RES_MEMORY, 0,
  231                     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, ar71xx_ehci_probe),
  242         DEVMETHOD(device_attach, ar71xx_ehci_attach),
  243         DEVMETHOD(device_detach, ar71xx_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         DEVMETHOD_END
  249 };
  250 
  251 static driver_t ehci_driver = {
  252         .name = "ehci",
  253         .methods = ehci_methods,
  254         .size = sizeof(struct ar71xx_ehci_softc),
  255 };
  256 
  257 static devclass_t ehci_devclass;
  258 
  259 DRIVER_MODULE(ehci, nexus, ehci_driver, ehci_devclass, 0, 0);
  260 MODULE_DEPEND(ehci, usb, 1, 1, 1);

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

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