tegra_ehci.c

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    1 /*-
    2  * Copyright (c) 2016 Michal Meloun <mmel@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 /*
   31  * EHCI driver for Tegra SoCs.
   32  */
   33 #include "opt_bus.h"
   34 #include "opt_platform.h"
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/kernel.h>
   39 #include <sys/module.h>
   40 #include <sys/bus.h>
   41 #include <sys/condvar.h>
   42 #include <sys/rman.h>
   43 
   44 #include <machine/bus.h>
   45 #include <machine/resource.h>
   46 
   47 #include <dev/extres/clk/clk.h>
   48 #include <dev/extres/hwreset/hwreset.h>
   49 #include <dev/extres/phy/phy.h>
   50 #include <dev/ofw/ofw_bus.h>
   51 #include <dev/ofw/ofw_bus_subr.h>
   52 #include <dev/usb/usb.h>
   53 #include <dev/usb/usbdi.h>
   54 #include <dev/usb/usb_busdma.h>
   55 #include <dev/usb/usb_process.h>
   56 #include <dev/usb/usb_controller.h>
   57 #include <dev/usb/usb_bus.h>
   58 #include <dev/usb/controller/ehci.h>
   59 #include <dev/usb/controller/ehcireg.h>
   60 
   61 #include "usbdevs.h"
   62 
   63 #define TEGRA_EHCI_REG_OFF      0x100
   64 #define TEGRA_EHCI_REG_SIZE     0x100
   65 
   66 /* Compatible devices. */
   67 #define TEGRA124_EHCI           1
   68 #define TEGRA210_EHCI           2
   69 static struct ofw_compat_data compat_data[] = {
   70         {"nvidia,tegra124-ehci",        (uintptr_t)TEGRA124_EHCI},
   71         {"nvidia,tegra210-ehci",        (uintptr_t)TEGRA210_EHCI},
   72         {NULL,                  0},
   73 };
   74 
   75 struct tegra_ehci_softc {
   76         ehci_softc_t    ehci_softc;
   77         device_t        dev;
   78         struct resource *ehci_mem_res;  /* EHCI core regs. */
   79         struct resource *ehci_irq_res;  /* EHCI core IRQ. */
   80         int             usb_alloc_called;
   81         clk_t           clk;
   82         phy_t           phy;
   83         hwreset_t       reset;
   84 };
   85 
   86 static void
   87 tegra_ehci_post_reset(struct ehci_softc *ehci_softc)
   88 {
   89         uint32_t usbmode;
   90 
   91         /* Force HOST mode. */
   92         usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_LPM);
   93         usbmode &= ~EHCI_UM_CM;
   94         usbmode |= EHCI_UM_CM_HOST;
   95         device_printf(ehci_softc->sc_bus.bdev, "set host controller mode\n");
   96         EOWRITE4(ehci_softc, EHCI_USBMODE_LPM, usbmode);
   97 }
   98 
   99 static int
  100 tegra_ehci_probe(device_t dev)
  101 {
  102 
  103         if (!ofw_bus_status_okay(dev))
  104                 return (ENXIO);
  105 
  106         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {
  107                 device_set_desc(dev, "Nvidia Tegra EHCI controller");
  108                 return (BUS_PROBE_DEFAULT);
  109         }
  110         return (ENXIO);
  111 }
  112 
  113 static int
  114 tegra_ehci_detach(device_t dev)
  115 {
  116         struct tegra_ehci_softc *sc;
  117         ehci_softc_t *esc;
  118 
  119         sc = device_get_softc(dev);
  120 
  121         esc = &sc->ehci_softc;
  122         if (sc->clk != NULL)
  123                 clk_release(sc->clk);
  124         if (esc->sc_bus.bdev != NULL)
  125                 device_delete_child(dev, esc->sc_bus.bdev);
  126         if (esc->sc_flags & EHCI_SCFLG_DONEINIT)
  127                 ehci_detach(esc);
  128         if (esc->sc_intr_hdl != NULL)
  129                 bus_teardown_intr(dev, esc->sc_irq_res,
  130                     esc->sc_intr_hdl);
  131         if (sc->ehci_irq_res != NULL)
  132                 bus_release_resource(dev, SYS_RES_IRQ, 0,
  133                     sc->ehci_irq_res);
  134         if (sc->ehci_mem_res != NULL)
  135                 bus_release_resource(dev, SYS_RES_MEMORY, 0,
  136                     sc->ehci_mem_res);
  137         if (sc->usb_alloc_called)
  138                 usb_bus_mem_free_all(&esc->sc_bus, &ehci_iterate_hw_softc);
  139 
  140         /* During module unload there are lots of children leftover. */
  141         device_delete_children(dev);
  142 
  143         return (0);
  144 }
  145 
  146 static int
  147 tegra_ehci_attach(device_t dev)
  148 {
  149         struct tegra_ehci_softc *sc;
  150         ehci_softc_t *esc;
  151         int rv, rid;
  152         uint64_t freq;
  153         phandle_t node;
  154 
  155         sc = device_get_softc(dev);
  156         sc->dev = dev;
  157         node = ofw_bus_get_node(dev);
  158         esc = &sc->ehci_softc;
  159 
  160         /* Allocate resources. */
  161         rid = 0;
  162         sc->ehci_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
  163             RF_ACTIVE | RF_SHAREABLE);
  164         if (sc->ehci_mem_res == NULL) {
  165                 device_printf(dev, "Cannot allocate memory resources\n");
  166                 rv = ENXIO;
  167                 goto out;
  168         }
  169 
  170         rid = 0;
  171         sc->ehci_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
  172             RF_ACTIVE);
  173         if (sc->ehci_irq_res == NULL) {
  174                 device_printf(dev, "Cannot allocate IRQ resources\n");
  175                 rv = ENXIO;
  176                 goto out;
  177         }
  178 
  179         rv = hwreset_get_by_ofw_name(dev, 0, "usb", &sc->reset);
  180         if (rv != 0) {
  181                 device_printf(dev, "Cannot get reset\n");
  182                 rv = ENXIO;
  183                 goto out;
  184         }
  185 
  186         rv = phy_get_by_ofw_property(sc->dev, 0, "nvidia,phy", &sc->phy);
  187         if (rv != 0) {
  188                 device_printf(sc->dev, "Cannot get 'nvidia,phy' phy\n");
  189                 rv = ENXIO;
  190                 goto out;
  191         }
  192 
  193         rv = clk_get_by_ofw_index(sc->dev, 0, 0, &sc->clk);
  194         if (rv != 0) {
  195                 device_printf(dev, "Cannot get clock\n");
  196                 goto out;
  197         }
  198 
  199         rv = clk_enable(sc->clk);
  200         if (rv != 0) {
  201                 device_printf(dev, "Cannot enable clock\n");
  202                 goto out;
  203         }
  204 
  205         freq = 0;
  206         rv = clk_get_freq(sc->clk, &freq);
  207         if (rv != 0) {
  208                 device_printf(dev, "Cannot get clock frequency\n");
  209                 goto out;
  210         }
  211 
  212         rv = hwreset_deassert(sc->reset);
  213         if (rv != 0) {
  214                 device_printf(dev, "Cannot clear reset: %d\n", rv);
  215                 rv = ENXIO;
  216                 goto out;
  217         }
  218 
  219         rv = phy_enable(sc->phy);
  220         if (rv != 0) {
  221                 device_printf(dev, "Cannot enable phy: %d\n", rv);
  222                 goto out;
  223         }
  224 
  225         /* Fill data for EHCI driver. */
  226         esc->sc_vendor_get_port_speed = ehci_get_port_speed_hostc;
  227         esc->sc_vendor_post_reset = tegra_ehci_post_reset;
  228         esc->sc_io_tag = rman_get_bustag(sc->ehci_mem_res);
  229         esc->sc_bus.parent = dev;
  230         esc->sc_bus.devices = esc->sc_devices;
  231         esc->sc_bus.devices_max = EHCI_MAX_DEVICES;
  232         esc->sc_bus.dma_bits = 32;
  233 
  234         /* Allocate all DMA memory. */
  235         rv = usb_bus_mem_alloc_all(&esc->sc_bus, USB_GET_DMA_TAG(dev),
  236             &ehci_iterate_hw_softc);
  237         sc->usb_alloc_called = 1;
  238         if (rv != 0) {
  239                 device_printf(dev, "usb_bus_mem_alloc_all() failed\n");
  240                 rv = ENOMEM;
  241                 goto out;
  242         }
  243 
  244         /*
  245          * Set handle to USB related registers subregion used by
  246          * generic EHCI driver.
  247          */
  248         rv = bus_space_subregion(esc->sc_io_tag,
  249             rman_get_bushandle(sc->ehci_mem_res),
  250             TEGRA_EHCI_REG_OFF, TEGRA_EHCI_REG_SIZE, &esc->sc_io_hdl);
  251         if (rv != 0) {
  252                 device_printf(dev, "Could not create USB memory subregion\n");
  253                 rv = ENXIO;
  254                 goto out;
  255         }
  256 
  257         /* Setup interrupt handler. */
  258         rv = bus_setup_intr(dev, sc->ehci_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
  259             NULL, (driver_intr_t *)ehci_interrupt, esc, &esc->sc_intr_hdl);
  260         if (rv != 0) {
  261                 device_printf(dev, "Could not setup IRQ\n");
  262                 goto out;
  263         }
  264 
  265         /* Add USB bus device. */
  266         esc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
  267         if (esc->sc_bus.bdev == NULL) {
  268                 device_printf(dev, "Could not add USB device\n");
  269                 goto out;
  270         }
  271         device_set_ivars(esc->sc_bus.bdev, &esc->sc_bus);
  272 
  273         esc->sc_id_vendor = USB_VENDOR_FREESCALE;
  274         strlcpy(esc->sc_vendor, "Nvidia", sizeof(esc->sc_vendor));
  275 
  276         /* Set flags that affect ehci_init() behavior. */
  277         esc->sc_flags |= EHCI_SCFLG_TT;
  278         esc->sc_flags |= EHCI_SCFLG_NORESTERM;
  279         rv = ehci_init(esc);
  280         if (rv != 0) {
  281                 device_printf(dev, "USB init failed: %d\n",
  282                     rv);
  283                 goto out;
  284         }
  285         esc->sc_flags |= EHCI_SCFLG_DONEINIT;
  286 
  287         /* Probe the bus. */
  288         rv = device_probe_and_attach(esc->sc_bus.bdev);
  289         if (rv != 0) {
  290                 device_printf(dev,
  291                     "device_probe_and_attach() failed\n");
  292                 goto out;
  293         }
  294         return (0);
  295 
  296 out:
  297         tegra_ehci_detach(dev);
  298         return (rv);
  299 }
  300 
  301 static device_method_t ehci_methods[] = {
  302         /* Device interface */
  303         DEVMETHOD(device_probe, tegra_ehci_probe),
  304         DEVMETHOD(device_attach, tegra_ehci_attach),
  305         DEVMETHOD(device_detach, tegra_ehci_detach),
  306         DEVMETHOD(device_suspend, bus_generic_suspend),
  307         DEVMETHOD(device_resume, bus_generic_resume),
  308         DEVMETHOD(device_shutdown, bus_generic_shutdown),
  309 
  310         /* Bus interface */
  311         DEVMETHOD(bus_print_child, bus_generic_print_child),
  312 
  313         DEVMETHOD_END
  314 };
  315 
  316 static devclass_t ehci_devclass;
  317 static DEFINE_CLASS_0(ehci, ehci_driver, ehci_methods,
  318     sizeof(struct tegra_ehci_softc));
  319 DRIVER_MODULE(tegra_ehci, simplebus, ehci_driver, ehci_devclass, NULL, NULL);
  320 MODULE_DEPEND(tegra_ehci, usb, 1, 1, 1);
Cache object: a3ebc253d5bf3a78775a1066699f102c
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FreeBSD/Linux Kernel Cross Reference sys/arm/nvidia/tegra_ehci.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/nvidia/tegra_ehci.c
