ar71xx_ohci.c revision 308402
1/*- 2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@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 unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: stable/10/sys/mips/atheros/ar71xx_ohci.c 308402 2016-11-07 09:19:04Z hselasky $"); 30 31#include <sys/param.h> 32#include <sys/systm.h> 33#include <sys/bus.h> 34#include <sys/rman.h> 35#include <sys/condvar.h> 36#include <sys/kernel.h> 37#include <sys/module.h> 38 39#include <dev/usb/usb.h> 40#include <dev/usb/usbdi.h> 41 42#include <dev/usb/usb_core.h> 43#include <dev/usb/usb_busdma.h> 44#include <dev/usb/usb_process.h> 45#include <dev/usb/usb_util.h> 46 47#include <dev/usb/usb_controller.h> 48#include <dev/usb/usb_bus.h> 49#include <dev/usb/controller/ohci.h> 50#include <dev/usb/controller/ohcireg.h> 51 52static int ar71xx_ohci_attach(device_t dev); 53static int ar71xx_ohci_detach(device_t dev); 54static int ar71xx_ohci_probe(device_t dev); 55 56struct ar71xx_ohci_softc 57{ 58 struct ohci_softc sc_ohci; 59}; 60 61static int 62ar71xx_ohci_probe(device_t dev) 63{ 64 device_set_desc(dev, "AR71XX integrated OHCI controller"); 65 return (BUS_PROBE_DEFAULT); 66} 67 68static int 69ar71xx_ohci_attach(device_t dev) 70{ 71 struct ar71xx_ohci_softc *sc = device_get_softc(dev); 72 int err; 73 int rid; 74 75 /* initialise some bus fields */ 76 sc->sc_ohci.sc_bus.parent = dev; 77 sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices; 78 sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES; 79 sc->sc_ohci.sc_bus.dma_bits = 32; 80 81 /* get all DMA memory */ 82 if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus, 83 USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) { 84 return (ENOMEM); 85 } 86 87 sc->sc_ohci.sc_dev = dev; 88 89 rid = 0; 90 sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 91 RF_ACTIVE); 92 if (sc->sc_ohci.sc_io_res == NULL) { 93 err = ENOMEM; 94 goto error; 95 } 96 sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res); 97 sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res); 98 sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res); 99 100 rid = 0; 101 sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 102 RF_ACTIVE); 103 if (sc->sc_ohci.sc_irq_res == NULL) { 104 err = ENOMEM; 105 goto error; 106 } 107 sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1); 108 if (sc->sc_ohci.sc_bus.bdev == NULL) { 109 err = ENOMEM; 110 goto error; 111 } 112 device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus); 113 114 err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, 115 INTR_TYPE_BIO | INTR_MPSAFE, NULL, 116 (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl); 117 if (err) { 118 err = ENXIO; 119 goto error; 120 } 121 122 strlcpy(sc->sc_ohci.sc_vendor, "Atheros", sizeof(sc->sc_ohci.sc_vendor)); 123 124 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, OHCI_CONTROL, 0); 125 126 err = ohci_init(&sc->sc_ohci); 127 if (!err) 128 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev); 129 130 if (err) 131 goto error; 132 return (0); 133 134error: 135 if (err) { 136 ar71xx_ohci_detach(dev); 137 return (err); 138 } 139 return (err); 140} 141 142static int 143ar71xx_ohci_detach(device_t dev) 144{ 145 struct ar71xx_ohci_softc *sc = device_get_softc(dev); 146 147 /* during module unload there are lots of children leftover */ 148 device_delete_children(dev); 149 150 /* 151 * Put the controller into reset, then disable clocks and do 152 * the MI tear down. We have to disable the clocks/hardware 153 * after we do the rest of the teardown. We also disable the 154 * clocks in the opposite order we acquire them, but that 155 * doesn't seem to be absolutely necessary. We free up the 156 * clocks after we disable them, so the system could, in 157 * theory, reuse them. 158 */ 159 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, 160 OHCI_CONTROL, 0); 161 162 if (sc->sc_ohci.sc_intr_hdl) { 163 bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl); 164 sc->sc_ohci.sc_intr_hdl = NULL; 165 } 166 167 if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) { 168 /* 169 * only call ohci_detach() after ohci_init() 170 */ 171 ohci_detach(&sc->sc_ohci); 172 173 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res); 174 sc->sc_ohci.sc_irq_res = NULL; 175 } 176 if (sc->sc_ohci.sc_io_res) { 177 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_ohci.sc_io_res); 178 sc->sc_ohci.sc_io_res = NULL; 179 sc->sc_ohci.sc_io_tag = 0; 180 sc->sc_ohci.sc_io_hdl = 0; 181 } 182 usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc); 183 184 return (0); 185} 186 187static device_method_t ohci_methods[] = { 188 /* Device interface */ 189 DEVMETHOD(device_probe, ar71xx_ohci_probe), 190 DEVMETHOD(device_attach, ar71xx_ohci_attach), 191 DEVMETHOD(device_detach, ar71xx_ohci_detach), 192 DEVMETHOD(device_suspend, bus_generic_suspend), 193 DEVMETHOD(device_resume, bus_generic_resume), 194 DEVMETHOD(device_shutdown, bus_generic_shutdown), 195 196 DEVMETHOD_END 197}; 198 199static driver_t ohci_driver = { 200 .name = "ohci", 201 .methods = ohci_methods, 202 .size = sizeof(struct ar71xx_ohci_softc), 203}; 204 205static devclass_t ohci_devclass; 206 207DRIVER_MODULE(ohci, apb, ohci_driver, ohci_devclass, 0, 0); 208