ohci_fdt.c revision 266217
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_fdt.c 266217 2014-05-16 12:43:45Z 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#include <dev/fdt/fdt_common.h> 65#include <dev/ofw/ofw_bus.h> 66#include <dev/ofw/ofw_bus_subr.h> 67 68#define MEM_RID 0 69 70static device_probe_t ohci_at91_fdt_probe; 71static device_attach_t ohci_at91_fdt_attach; 72static device_detach_t ohci_at91_fdt_detach; 73 74struct at91_ohci_softc { 75 struct ohci_softc sc_ohci; /* must be first */ 76 struct at91_pmc_clock *mclk; 77 struct at91_pmc_clock *iclk; 78 struct at91_pmc_clock *fclk; 79}; 80 81static int 82ohci_at91_fdt_probe(device_t dev) 83{ 84 if (!ofw_bus_is_compatible(dev, "atmel,at91rm9200-ohci")) 85 return (ENXIO); 86 device_set_desc(dev, "AT91 integrated OHCI controller"); 87 88 return (BUS_PROBE_DEFAULT); 89} 90 91static int 92ohci_at91_fdt_attach(device_t dev) 93{ 94 struct at91_ohci_softc *sc = device_get_softc(dev); 95 int err; 96 int rid; 97 98 /* initialise some bus fields */ 99 sc->sc_ohci.sc_bus.parent = dev; 100 sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices; 101 sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES; 102 103 /* get all DMA memory */ 104 if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus, 105 USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) { 106 return (ENOMEM); 107 } 108 sc->mclk = at91_pmc_clock_ref("mck"); 109 sc->iclk = at91_pmc_clock_ref("ohci_clk"); 110 sc->fclk = at91_pmc_clock_ref("uhpck"); 111 112 sc->sc_ohci.sc_dev = dev; 113 114 rid = MEM_RID; 115 sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 116 &rid, RF_ACTIVE); 117 118 if (!(sc->sc_ohci.sc_io_res)) { 119 err = ENOMEM; 120 goto error; 121 } 122 sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res); 123 sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res); 124 sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res); 125 126 rid = 0; 127 sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 128 RF_ACTIVE); 129 if (!(sc->sc_ohci.sc_irq_res)) { 130 goto error; 131 } 132 sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1); 133 if (!(sc->sc_ohci.sc_bus.bdev)) { 134 goto error; 135 } 136 device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus); 137 138 strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor)); 139 140 err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE, 141 NULL, (driver_intr_t *)ohci_interrupt, sc, &sc->sc_ohci.sc_intr_hdl); 142 if (err) { 143 sc->sc_ohci.sc_intr_hdl = NULL; 144 goto error; 145 } 146 /* 147 * turn on the clocks from the AT91's point of view. Keep the unit in reset. 148 */ 149 at91_pmc_clock_enable(sc->mclk); 150 at91_pmc_clock_enable(sc->iclk); 151 at91_pmc_clock_enable(sc->fclk); 152 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, 153 OHCI_CONTROL, 0); 154 155 err = ohci_init(&sc->sc_ohci); 156 if (!err) { 157 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev); 158 } 159 if (err) { 160 goto error; 161 } 162 return (0); 163 164error: 165 ohci_at91_fdt_detach(dev); 166 return (ENXIO); 167} 168 169static int 170ohci_at91_fdt_detach(device_t dev) 171{ 172 struct at91_ohci_softc *sc = device_get_softc(dev); 173 device_t bdev; 174 int err; 175 176 if (sc->sc_ohci.sc_bus.bdev) { 177 bdev = sc->sc_ohci.sc_bus.bdev; 178 device_detach(bdev); 179 device_delete_child(dev, bdev); 180 } 181 /* during module unload there are lots of children leftover */ 182 device_delete_children(dev); 183 184 if (sc->sc_ohci.sc_io_res != NULL) { 185 /* 186 * Put the controller into reset, then disable clocks and do 187 * the MI tear down. We have to disable the clocks/hardware 188 * after we do the rest of the teardown. We also disable the 189 * clocks in the opposite order we acquire them, but that 190 * doesn't seem to be absolutely necessary. We free up the 191 * clocks after we disable them, so the system could, in 192 * theory, reuse them. 193 */ 194 bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, 195 OHCI_CONTROL, 0); 196 197 at91_pmc_clock_disable(sc->fclk); 198 at91_pmc_clock_disable(sc->iclk); 199 at91_pmc_clock_disable(sc->mclk); 200 at91_pmc_clock_deref(sc->fclk); 201 at91_pmc_clock_deref(sc->iclk); 202 at91_pmc_clock_deref(sc->mclk); 203 204 if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) { 205 /* 206 * only call ohci_detach() after ohci_init() 207 */ 208 ohci_detach(&sc->sc_ohci); 209 210 err = bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, 211 sc->sc_ohci.sc_intr_hdl); 212 sc->sc_ohci.sc_intr_hdl = NULL; 213 } 214 if (sc->sc_ohci.sc_irq_res) { 215 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res); 216 sc->sc_ohci.sc_irq_res = NULL; 217 } 218 if (sc->sc_ohci.sc_io_res) { 219 bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID, 220 sc->sc_ohci.sc_io_res); 221 sc->sc_ohci.sc_io_res = NULL; 222 } 223 } 224 usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc); 225 226 return (0); 227} 228 229static device_method_t ohci_methods[] = { 230 /* Device interface */ 231 DEVMETHOD(device_probe, ohci_at91_fdt_probe), 232 DEVMETHOD(device_attach, ohci_at91_fdt_attach), 233 DEVMETHOD(device_detach, ohci_at91_fdt_detach), 234 DEVMETHOD(device_suspend, bus_generic_suspend), 235 DEVMETHOD(device_resume, bus_generic_resume), 236 DEVMETHOD(device_shutdown, bus_generic_shutdown), 237 238 DEVMETHOD_END 239}; 240 241static driver_t ohci_driver = { 242 .name = "ohci", 243 .methods = ohci_methods, 244 .size = sizeof(struct at91_ohci_softc), 245}; 246 247static devclass_t ohci_devclass; 248 249DRIVER_MODULE(ohci, simplebus, ohci_driver, ohci_devclass, 0, 0); 250MODULE_DEPEND(ohci, usb, 1, 1, 1); 251