dwc_otg_fdt.c revision 308401
1/*- 2 * Copyright (c) 2012 Hans Petter Selasky. 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 AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h> 27__FBSDID("$FreeBSD: stable/11/sys/dev/usb/controller/dwc_otg_fdt.c 308401 2016-11-07 08:36:06Z hselasky $"); 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/bus.h> 32#include <sys/condvar.h> 33#include <sys/kernel.h> 34#include <sys/lock.h> 35#include <sys/malloc.h> 36#include <sys/module.h> 37#include <sys/mutex.h> 38#include <sys/rman.h> 39 40#include <dev/ofw/openfirm.h> 41#include <dev/ofw/ofw_bus.h> 42#include <dev/ofw/ofw_bus_subr.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 55#include <dev/usb/controller/dwc_otg.h> 56#include <dev/usb/controller/dwc_otg_fdt.h> 57 58static device_probe_t dwc_otg_probe; 59static device_detach_t dwc_otg_detach; 60 61static int 62dwc_otg_probe(device_t dev) 63{ 64 65 if (!ofw_bus_status_okay(dev)) 66 return (ENXIO); 67 68 if (!ofw_bus_is_compatible(dev, "synopsys,designware-hs-otg2")) 69 return (ENXIO); 70 71 device_set_desc(dev, "DWC OTG 2.0 integrated USB controller"); 72 73 return (BUS_PROBE_DEFAULT); 74} 75 76int 77dwc_otg_attach(device_t dev) 78{ 79 struct dwc_otg_fdt_softc *sc = device_get_softc(dev); 80 char usb_mode[24]; 81 int err; 82 int rid; 83 84 /* initialise some bus fields */ 85 sc->sc_otg.sc_bus.parent = dev; 86 sc->sc_otg.sc_bus.devices = sc->sc_otg.sc_devices; 87 sc->sc_otg.sc_bus.devices_max = DWC_OTG_MAX_DEVICES; 88 sc->sc_otg.sc_bus.dma_bits = 32; 89 90 /* get USB mode, if any */ 91 if (OF_getprop(ofw_bus_get_node(dev), "dr_mode", 92 &usb_mode, sizeof(usb_mode)) > 0) { 93 94 /* ensure proper zero termination */ 95 usb_mode[sizeof(usb_mode) - 1] = 0; 96 97 if (strcasecmp(usb_mode, "host") == 0) 98 sc->sc_otg.sc_mode = DWC_MODE_HOST; 99 else if (strcasecmp(usb_mode, "peripheral") == 0) 100 sc->sc_otg.sc_mode = DWC_MODE_DEVICE; 101 else if (strcasecmp(usb_mode, "otg") != 0) { 102 device_printf(dev, "Invalid FDT dr_mode: %s\n", 103 usb_mode); 104 } 105 } 106 107 /* get all DMA memory */ 108 if (usb_bus_mem_alloc_all(&sc->sc_otg.sc_bus, 109 USB_GET_DMA_TAG(dev), NULL)) { 110 return (ENOMEM); 111 } 112 rid = 0; 113 sc->sc_otg.sc_io_res = 114 bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 115 116 if (!(sc->sc_otg.sc_io_res)) { 117 err = ENOMEM; 118 goto error; 119 } 120 sc->sc_otg.sc_io_tag = rman_get_bustag(sc->sc_otg.sc_io_res); 121 sc->sc_otg.sc_io_hdl = rman_get_bushandle(sc->sc_otg.sc_io_res); 122 sc->sc_otg.sc_io_size = rman_get_size(sc->sc_otg.sc_io_res); 123 124 125 /* 126 * brcm,bcm2708-usb FDT provides two interrupts, 127 * we need only second one (VC_USB) 128 */ 129 rid = ofw_bus_is_compatible(dev, "brcm,bcm2708-usb") ? 1 : 0; 130 sc->sc_otg.sc_irq_res = 131 bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 132 if (sc->sc_otg.sc_irq_res == NULL) 133 goto error; 134 135 sc->sc_otg.sc_bus.bdev = device_add_child(dev, "usbus", -1); 136 if (sc->sc_otg.sc_bus.bdev == NULL) 137 goto error; 138 139 device_set_ivars(sc->sc_otg.sc_bus.bdev, &sc->sc_otg.sc_bus); 140 141 err = bus_setup_intr(dev, sc->sc_otg.sc_irq_res, INTR_TYPE_TTY | INTR_MPSAFE, 142 &dwc_otg_filter_interrupt, &dwc_otg_interrupt, sc, &sc->sc_otg.sc_intr_hdl); 143 if (err) { 144 sc->sc_otg.sc_intr_hdl = NULL; 145 goto error; 146 } 147 err = dwc_otg_init(&sc->sc_otg); 148 if (err == 0) { 149 err = device_probe_and_attach(sc->sc_otg.sc_bus.bdev); 150 } 151 if (err) 152 goto error; 153 154 155 return (0); 156 157error: 158 dwc_otg_detach(dev); 159 return (ENXIO); 160} 161 162static int 163dwc_otg_detach(device_t dev) 164{ 165 struct dwc_otg_fdt_softc *sc = device_get_softc(dev); 166 int err; 167 168 /* during module unload there are lots of children leftover */ 169 device_delete_children(dev); 170 171 if (sc->sc_otg.sc_irq_res && sc->sc_otg.sc_intr_hdl) { 172 /* 173 * only call dwc_otg_uninit() after dwc_otg_init() 174 */ 175 dwc_otg_uninit(&sc->sc_otg); 176 177 err = bus_teardown_intr(dev, sc->sc_otg.sc_irq_res, 178 sc->sc_otg.sc_intr_hdl); 179 sc->sc_otg.sc_intr_hdl = NULL; 180 } 181 /* free IRQ channel, if any */ 182 if (sc->sc_otg.sc_irq_res) { 183 bus_release_resource(dev, SYS_RES_IRQ, 0, 184 sc->sc_otg.sc_irq_res); 185 sc->sc_otg.sc_irq_res = NULL; 186 } 187 /* free memory resource, if any */ 188 if (sc->sc_otg.sc_io_res) { 189 bus_release_resource(dev, SYS_RES_MEMORY, 0, 190 sc->sc_otg.sc_io_res); 191 sc->sc_otg.sc_io_res = NULL; 192 } 193 usb_bus_mem_free_all(&sc->sc_otg.sc_bus, NULL); 194 195 return (0); 196} 197 198static device_method_t dwc_otg_methods[] = { 199 /* Device interface */ 200 DEVMETHOD(device_probe, dwc_otg_probe), 201 DEVMETHOD(device_attach, dwc_otg_attach), 202 DEVMETHOD(device_detach, dwc_otg_detach), 203 DEVMETHOD(device_suspend, bus_generic_suspend), 204 DEVMETHOD(device_resume, bus_generic_resume), 205 DEVMETHOD(device_shutdown, bus_generic_shutdown), 206 207 DEVMETHOD_END 208}; 209 210driver_t dwc_otg_driver = { 211 .name = "dwcotg", 212 .methods = dwc_otg_methods, 213 .size = sizeof(struct dwc_otg_fdt_softc), 214}; 215 216static devclass_t dwc_otg_devclass; 217 218DRIVER_MODULE(dwcotg, simplebus, dwc_otg_driver, dwc_otg_devclass, 0, 0); 219MODULE_DEPEND(dwcotg, usb, 1, 1, 1); 220