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/ingenic/jz4780_ohci.c

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    1 /*-
    2  * Copyright (c) 2015, Alexander Kabaev <kan@FreeBSD.org>
    3  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice unmodified, this list of conditions, and the following
   11  *    disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: stable/12/sys/mips/ingenic/jz4780_ohci.c 308857 2016-11-19 17:46:18Z br $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/bus.h>
   35 #include <sys/rman.h>
   36 #include <sys/condvar.h>
   37 #include <sys/kernel.h>
   38 #include <sys/module.h>
   39 #include <sys/gpio.h>
   40 
   41 #include <dev/extres/clk/clk.h>
   42 
   43 #include <dev/usb/usb.h>
   44 #include <dev/usb/usbdi.h>
   45 
   46 #include <dev/usb/usb_core.h>
   47 #include <dev/usb/usb_busdma.h>
   48 #include <dev/usb/usb_process.h>
   49 #include <dev/usb/usb_util.h>
   50 
   51 #include <dev/usb/usb_controller.h>
   52 #include <dev/usb/usb_bus.h>
   53 #include <dev/usb/controller/ohci.h>
   54 #include <dev/usb/controller/ohcireg.h>
   55 
   56 #include <dev/ofw/ofw_bus.h>
   57 #include <dev/ofw/ofw_bus_subr.h>
   58 
   59 #include <dev/gpio/gpiobusvar.h>
   60 
   61 #include <mips/ingenic/jz4780_clock.h>
   62 #include <mips/ingenic/jz4780_regs.h>
   63 
   64 static int jz4780_ohci_attach(device_t dev);
   65 static int jz4780_ohci_detach(device_t dev);
   66 static int jz4780_ohci_probe(device_t dev);
   67 
   68 struct jz4780_ohci_softc
   69 {
   70         struct ohci_softc sc_ohci;
   71         struct gpiobus_pin *gpio_vbus;
   72         clk_t clk;
   73 };
   74 
   75 static int
   76 jz4780_ohci_probe(device_t dev)
   77 {
   78         if (!ofw_bus_status_okay(dev))
   79                 return (ENXIO);
   80 
   81         if (!ofw_bus_is_compatible(dev, "ingenic,jz4780-ohci"))
   82                 return (ENXIO);
   83 
   84         device_set_desc(dev, "Ingenic JZ4780 OHCI");
   85 
   86         return (BUS_PROBE_DEFAULT);
   87 }
   88 
   89 static int
   90 jz4780_ohci_vbus_gpio_enable(device_t dev, struct jz4780_ohci_softc *sc)
   91 {
   92         struct gpiobus_pin *gpio_vbus;
   93         int error;
   94 
   95         error = ofw_gpiobus_parse_gpios(dev, "ingenic,vbus-gpio", &gpio_vbus);
   96         /*
   97          * The pin can be mapped already by other device. Assume it also has need
   98          * activated and proceed happily.
   99          */
  100         if (error <= 0)
  101                 return (0);
  102 
  103         sc->gpio_vbus = gpio_vbus;
  104         if (error > 1) {
  105                 device_printf(dev, "too many vbus gpios\n");
  106                 return (ENXIO);
  107         }
  108 
  109         if (sc->gpio_vbus != NULL) {
  110                 error = GPIO_PIN_SET(sc->gpio_vbus->dev, sc->gpio_vbus->pin, 1);
  111                 if (error != 0) {
  112                         device_printf(dev, "Cannot configure GPIO pin %d on %s\n",
  113                             sc->gpio_vbus->pin, device_get_nameunit(sc->gpio_vbus->dev));
  114                         return (error);
  115                 }
  116 
  117                 error = GPIO_PIN_SETFLAGS(sc->gpio_vbus->dev, sc->gpio_vbus->pin,
  118                     GPIO_PIN_OUTPUT);
  119                 if (error != 0) {
  120                         device_printf(dev, "Cannot configure GPIO pin %d on %s\n",
  121                             sc->gpio_vbus->pin, device_get_nameunit(sc->gpio_vbus->dev));
  122                         return (error);
  123                 }
  124         }
  125         return (0);
  126 }
  127 
  128 static int
  129 jz4780_ohci_clk_enable(device_t dev)
  130 {
  131         struct jz4780_ohci_softc *sc;
  132         int err;
  133 
  134         sc = device_get_softc(dev);
  135 
  136         err = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);
  137         if (err != 0) {
  138                 device_printf(dev, "unable to lookup device clock\n");
  139                 return (err);
  140         }
  141         err = clk_enable(sc->clk);
  142         if (err != 0) {
  143                 device_printf(dev, "unable to enable device clock\n");
  144                 return (err);
  145         }
  146         err = clk_set_freq(sc->clk, 48000000, 0);
  147         if (err != 0) {
  148                 device_printf(dev, "unable to set device clock to 48 kHZ\n");
  149                 return (err);
  150         }
  151         return (0);
  152 }
  153 
  154 static int
  155 jz4780_ohci_attach(device_t dev)
  156 {
  157         struct jz4780_ohci_softc *sc = device_get_softc(dev);
  158         int err;
  159         int rid;
  160 
  161         /* initialize some bus fields */
  162         sc->sc_ohci.sc_bus.parent = dev;
  163         sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices;
  164         sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES;
  165         sc->sc_ohci.sc_bus.dma_bits = 32;
  166 
  167         /* get all DMA memory */
  168         if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
  169             USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
  170                 return (ENOMEM);
  171         }
  172 
  173         sc->sc_ohci.sc_dev = dev;
  174 
  175         /* frob vbus gpio */
  176         err = jz4780_ohci_vbus_gpio_enable(dev, sc);
  177         if (err)
  178                 goto error;
  179 
  180         err = jz4780_ohci_clk_enable(dev);
  181         if (err)
  182                 goto error;
  183 
  184         rid = 0;
  185         sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
  186             RF_ACTIVE);
  187         if (sc->sc_ohci.sc_io_res == NULL) {
  188                 err = ENOMEM;
  189                 goto error;
  190         }
  191         sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
  192         sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
  193         sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
  194 
  195         rid = 0;
  196         sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
  197             RF_ACTIVE);
  198         if (sc->sc_ohci.sc_irq_res == NULL) {
  199                 err = ENOMEM;
  200                 goto error;
  201         }
  202 
  203         if (jz4780_ohci_enable() != 0) {
  204                 device_printf(dev, "CGU failed to enable OHCI\n");
  205                 err = ENXIO;
  206                 goto error;
  207         }
  208 
  209         sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
  210         if (sc->sc_ohci.sc_bus.bdev == NULL) {
  211                 err = ENOMEM;
  212                 goto error;
  213         }
  214         device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
  215 
  216         err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res,
  217             INTR_TYPE_BIO | INTR_MPSAFE, NULL,
  218             (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl);
  219         if (err) {
  220                 err = ENXIO;
  221                 goto error;
  222         }
  223 
  224         strlcpy(sc->sc_ohci.sc_vendor, "Ingenic", sizeof(sc->sc_ohci.sc_vendor));
  225         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, OHCI_CONTROL, 0);
  226 
  227         err = ohci_init(&sc->sc_ohci);
  228         if (!err)
  229                 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
  230 
  231         if (err)
  232                 goto error;
  233         return (0);
  234 
  235 error:
  236         if (err)
  237                 jz4780_ohci_detach(dev);
  238         return (err);
  239 }
  240 
  241 static int
  242 jz4780_ohci_detach(device_t dev)
  243 {
  244         struct jz4780_ohci_softc *sc = device_get_softc(dev);
  245         device_t bdev;
  246 
  247         if (sc->sc_ohci.sc_bus.bdev) {
  248                 bdev = sc->sc_ohci.sc_bus.bdev;
  249                 device_detach(bdev);
  250                 device_delete_child(dev, bdev);
  251         }
  252         /* during module unload there are lots of children leftover */
  253         device_delete_children(dev);
  254 
  255         /*
  256          * Put the controller into reset, then disable clocks and do
  257          * the MI tear down.  We have to disable the clocks/hardware
  258          * after we do the rest of the teardown.  We also disable the
  259          * clocks in the opposite order we acquire them, but that
  260          * doesn't seem to be absolutely necessary.  We free up the
  261          * clocks after we disable them, so the system could, in
  262          * theory, reuse them.
  263          */
  264         if (sc->sc_ohci.sc_io_res != NULL) {
  265                 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
  266                     OHCI_CONTROL, 0);
  267         }
  268 
  269         if (sc->sc_ohci.sc_intr_hdl) {
  270                 bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl);
  271                 sc->sc_ohci.sc_intr_hdl = NULL;
  272         }
  273 
  274         if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
  275                 /*
  276                  * only call ohci_detach() after ohci_init()
  277                  */
  278                 ohci_detach(&sc->sc_ohci);
  279 
  280                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
  281                 sc->sc_ohci.sc_irq_res = NULL;
  282         }
  283         if (sc->sc_ohci.sc_io_res) {
  284                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_ohci.sc_io_res);
  285                 sc->sc_ohci.sc_io_res = NULL;
  286                 sc->sc_ohci.sc_io_tag = 0;
  287                 sc->sc_ohci.sc_io_hdl = 0;
  288         }
  289 
  290         if (sc->clk != NULL)
  291                 clk_release(sc->clk);
  292 
  293         usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
  294         free(sc->gpio_vbus, M_DEVBUF);
  295         return (0);
  296 }
  297 
  298 static device_method_t ohci_methods[] = {
  299         /* Device interface */
  300         DEVMETHOD(device_probe, jz4780_ohci_probe),
  301         DEVMETHOD(device_attach, jz4780_ohci_attach),
  302         DEVMETHOD(device_detach, jz4780_ohci_detach),
  303         DEVMETHOD(device_suspend, bus_generic_suspend),
  304         DEVMETHOD(device_resume, bus_generic_resume),
  305         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  306 
  307         DEVMETHOD_END
  308 };
  309 
  310 static driver_t ohci_driver = {
  311         .name = "ohci",
  312         .methods = ohci_methods,
  313         .size = sizeof(struct jz4780_ohci_softc),
  314 };
  315 
  316 static devclass_t ohci_devclass;
  317 
  318 DRIVER_MODULE(ohci, simplebus, ohci_driver, ohci_devclass, 0, 0);

Cache object: 7db49cbe45a2afa18746acafc7b59d97


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