ohci_atmelarm.c revision 266170
1/*- 2 * Copyright (c) 2006 M. Warner Losh. 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#include <sys/cdefs.h> 26__FBSDID("$FreeBSD: stable/10/sys/dev/usb/controller/ohci_atmelarm.c 266170 2014-05-15 18:38:19Z ian $"); 27 28#include <sys/stdint.h> 29#include <sys/stddef.h> 30#include <sys/param.h> 31#include <sys/queue.h> 32#include <sys/types.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/bus.h> 36#include <sys/module.h> 37#include <sys/lock.h> 38#include <sys/mutex.h> 39#include <sys/condvar.h> 40#include <sys/sysctl.h> 41#include <sys/sx.h> 42#include <sys/unistd.h> 43#include <sys/callout.h> 44#include <sys/malloc.h> 45#include <sys/priv.h> 46 47#include <dev/usb/usb.h> 48#include <dev/usb/usbdi.h> 49 50#include <dev/usb/usb_core.h> 51#include <dev/usb/usb_busdma.h> 52#include <dev/usb/usb_process.h> 53#include <dev/usb/usb_util.h> 54 55#include <dev/usb/usb_controller.h> 56#include <dev/usb/usb_bus.h> 57#include <dev/usb/controller/ohci.h> 58#include <dev/usb/controller/ohcireg.h> 59 60#include <sys/rman.h> 61 62#include <arm/at91/at91_pmcvar.h> 63 64#define MEM_RID 0 65 66static device_probe_t ohci_atmelarm_probe; 67static device_attach_t ohci_atmelarm_attach; 68static device_detach_t ohci_atmelarm_detach; 69 70struct at91_ohci_softc { 71 struct ohci_softc sc_ohci; /* must be first */ 72 struct at91_pmc_clock *mclk; 73 struct at91_pmc_clock *iclk; 74 struct at91_pmc_clock *fclk; 75}; 76 77static int 78ohci_atmelarm_probe(device_t dev) 79{ 80 81 device_set_desc(dev, "AT91 integrated OHCI controller"); 82 return (BUS_PROBE_DEFAULT); 83} 84 85static int 86ohci_atmelarm_attach(device_t dev) 87{ 88 struct at91_ohci_softc *sc = device_get_softc(dev); 89 int err; 90 int rid; 91 92 /* initialise some bus fields */ 93 sc->sc_ohci.sc_bus.parent = dev; 94 sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices; 95 sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES; 96 97 /* get all DMA memory */ 98 if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus, 99 USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) { 100 return (ENOMEM); 101 } 102 sc->mclk = at91_pmc_clock_ref("mck"); 103 sc->iclk = at91_pmc_clock_ref("ohci_clk"); 104 sc->fclk = at91_pmc_clock_ref("uhpck"); 105 106 sc->sc_ohci.sc_dev = dev; 107 108 rid = MEM_RID; 109 sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 110 &rid, RF_ACTIVE); 111 112 if (!(sc->sc_ohci.sc_io_res)) { 113 err = ENOMEM; 114 goto error; 115 } 116 sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res); 117 sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res); 118 sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res); 119 120 rid = 0; 121 sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 122 RF_ACTIVE); 123 if (!(sc->sc_ohci.sc_irq_res)) { 124 goto error; 125 } 126 sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1); 127 if (!(sc->sc_ohci.sc_bus.bdev)) { 128 goto error; 129 } 130 device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus); 131 132 strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor)); 133 134 err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE, 135 NULL, (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl); 136 if (err) { 137 sc->sc_ohci.sc_intr_hdl = NULL; 138 goto error; 139 } 140 /* 141 * turn on the clocks from the AT91's point of view. Keep the unit in reset. 142 */ 143 at91_pmc_clock_enable(sc->mclk); 144 at91_pmc_clock_enable(sc->iclk); 145 at91_pmc_clock_enable(sc->fclk); 146 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, 147 OHCI_CONTROL, 0); 148 149 err = ohci_init(&sc->sc_ohci); 150 if (!err) { 151 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev); 152 } 153 if (err) { 154 goto error; 155 } 156 return (0); 157 158error: 159 ohci_atmelarm_detach(dev); 160 return (ENXIO); 161} 162 163static int 164ohci_atmelarm_detach(device_t dev) 165{ 166 struct at91_ohci_softc *sc = device_get_softc(dev); 167 device_t bdev; 168 int err; 169 170 if (sc->sc_ohci.sc_bus.bdev) { 171 bdev = sc->sc_ohci.sc_bus.bdev; 172 device_detach(bdev); 173 device_delete_child(dev, bdev); 174 } 175 /* during module unload there are lots of children leftover */ 176 device_delete_children(dev); 177 178 /* 179 * Put the controller into reset, then disable clocks and do 180 * the MI tear down. We have to disable the clocks/hardware 181 * after we do the rest of the teardown. We also disable the 182 * clocks in the opposite order we acquire them, but that 183 * doesn't seem to be absolutely necessary. We free up the 184 * clocks after we disable them, so the system could, in 185 * theory, reuse them. 186 */ 187 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, 188 OHCI_CONTROL, 0); 189 190 at91_pmc_clock_disable(sc->fclk); 191 at91_pmc_clock_disable(sc->iclk); 192 at91_pmc_clock_disable(sc->mclk); 193 at91_pmc_clock_deref(sc->fclk); 194 at91_pmc_clock_deref(sc->iclk); 195 at91_pmc_clock_deref(sc->mclk); 196 197 if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) { 198 /* 199 * only call ohci_detach() after ohci_init() 200 */ 201 ohci_detach(&sc->sc_ohci); 202 203 err = bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl); 204 sc->sc_ohci.sc_intr_hdl = NULL; 205 } 206 if (sc->sc_ohci.sc_irq_res) { 207 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res); 208 sc->sc_ohci.sc_irq_res = NULL; 209 } 210 if (sc->sc_ohci.sc_io_res) { 211 bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID, 212 sc->sc_ohci.sc_io_res); 213 sc->sc_ohci.sc_io_res = NULL; 214 } 215 usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc); 216 217 return (0); 218} 219 220static device_method_t ohci_methods[] = { 221 /* Device interface */ 222 DEVMETHOD(device_probe, ohci_atmelarm_probe), 223 DEVMETHOD(device_attach, ohci_atmelarm_attach), 224 DEVMETHOD(device_detach, ohci_atmelarm_detach), 225 DEVMETHOD(device_suspend, bus_generic_suspend), 226 DEVMETHOD(device_resume, bus_generic_resume), 227 DEVMETHOD(device_shutdown, bus_generic_shutdown), 228 229 DEVMETHOD_END 230}; 231 232static driver_t ohci_driver = { 233 .name = "ohci", 234 .methods = ohci_methods, 235 .size = sizeof(struct at91_ohci_softc), 236}; 237 238static devclass_t ohci_devclass; 239 240DRIVER_MODULE(ohci, atmelarm, ohci_driver, ohci_devclass, 0, 0); 241MODULE_DEPEND(ohci, usb, 1, 1, 1); 242