1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 Hans Petter Selasky. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following 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("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/condvar.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/mutex.h> 40 #include <sys/rman.h> 41 42 #include <dev/ofw/openfirm.h> 43 #include <dev/ofw/ofw_bus.h> 44 #include <dev/ofw/ofw_bus_subr.h> 45 46 #include <dev/usb/usb.h> 47 #include <dev/usb/usbdi.h> 48 49 #include <dev/usb/usb_core.h> 50 #include <dev/usb/usb_busdma.h> 51 #include <dev/usb/usb_process.h> 52 #include <dev/usb/usb_util.h> 53 54 #include <dev/usb/usb_controller.h> 55 #include <dev/usb/usb_bus.h> 56 57 #include <dev/usb/controller/dwc_otg.h> 58 #include <dev/usb/controller/dwc_otg_fdt.h> 59 60 static device_probe_t dwc_otg_probe; 61 62 static struct ofw_compat_data compat_data[] = { 63 { "synopsys,designware-hs-otg2", 1 }, 64 { "snps,dwc2", 1 }, 65 { NULL, 0 } 66 }; 67 68 static int 69 dwc_otg_probe(device_t dev) 70 { 71 72 if (!ofw_bus_status_okay(dev)) 73 return (ENXIO); 74 75 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data) 76 return (ENXIO); 77 78 device_set_desc(dev, "DWC OTG 2.0 integrated USB controller"); 79 80 return (BUS_PROBE_DEFAULT); 81 } 82 83 static int 84 dwc_otg_irq_index(device_t dev, int *rid) 85 { 86 int idx, rv; 87 phandle_t node; 88 89 node = ofw_bus_get_node(dev); 90 rv = ofw_bus_find_string_index(node, "interrupt-names", "usb", &idx); 91 if (rv != 0) 92 return (rv); 93 *rid = idx; 94 return (0); 95 } 96 97 int 98 dwc_otg_attach(device_t dev) 99 { 100 struct dwc_otg_fdt_softc *sc = device_get_softc(dev); 101 char usb_mode[24]; 102 int err; 103 int rid; 104 105 sc->sc_otg.sc_bus.parent = dev; 106 107 /* get USB mode, if any */ 108 if (OF_getprop(ofw_bus_get_node(dev), "dr_mode", 109 &usb_mode, sizeof(usb_mode)) > 0) { 110 /* ensure proper zero termination */ 111 usb_mode[sizeof(usb_mode) - 1] = 0; 112 113 if (strcasecmp(usb_mode, "host") == 0) 114 sc->sc_otg.sc_mode = DWC_MODE_HOST; 115 else if (strcasecmp(usb_mode, "peripheral") == 0) 116 sc->sc_otg.sc_mode = DWC_MODE_DEVICE; 117 else if (strcasecmp(usb_mode, "otg") != 0) { 118 device_printf(dev, "Invalid FDT dr_mode: %s\n", 119 usb_mode); 120 } 121 } 122 123 rid = 0; 124 sc->sc_otg.sc_io_res = 125 bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); 126 127 if (!(sc->sc_otg.sc_io_res)) 128 goto error; 129 130 /* 131 * brcm,bcm2708-usb FDT provides two interrupts, we need only the USB 132 * interrupt (VC_USB). The latest FDT for it provides an 133 * interrupt-names property and swapped them around, while older ones 134 * did not have interrupt-names and put the usb interrupt in the second 135 * position. We'll attempt to use interrupt-names first with a fallback 136 * to the old method of assuming the index based on the compatible 137 * string. 138 */ 139 if (dwc_otg_irq_index(dev, &rid) != 0) 140 rid = ofw_bus_is_compatible(dev, "brcm,bcm2708-usb") ? 1 : 0; 141 sc->sc_otg.sc_irq_res = 142 bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE); 143 if (sc->sc_otg.sc_irq_res == NULL) 144 goto error; 145 146 sc->sc_otg.sc_bus.bdev = device_add_child(dev, "usbus", -1); 147 if (sc->sc_otg.sc_bus.bdev == NULL) 148 goto error; 149 150 err = dwc_otg_init(&sc->sc_otg); 151 if (err == 0) { 152 err = device_probe_and_attach(sc->sc_otg.sc_bus.bdev); 153 } 154 if (err) 155 goto error; 156 157 return (0); 158 159 error: 160 dwc_otg_detach(dev); 161 return (ENXIO); 162 } 163 164 int 165 dwc_otg_detach(device_t dev) 166 { 167 struct dwc_otg_fdt_softc *sc = device_get_softc(dev); 168 169 /* during module unload there are lots of children leftover */ 170 device_delete_children(dev); 171 172 if (sc->sc_otg.sc_irq_res && sc->sc_otg.sc_intr_hdl) { 173 /* 174 * only call dwc_otg_uninit() after dwc_otg_init() 175 */ 176 dwc_otg_uninit(&sc->sc_otg); 177 178 bus_teardown_intr(dev, sc->sc_otg.sc_irq_res, 179 sc->sc_otg.sc_intr_hdl); 180 sc->sc_otg.sc_intr_hdl = NULL; 181 } 182 /* free IRQ channel, if any */ 183 if (sc->sc_otg.sc_irq_res) { 184 bus_release_resource(dev, SYS_RES_IRQ, 0, 185 sc->sc_otg.sc_irq_res); 186 sc->sc_otg.sc_irq_res = NULL; 187 } 188 /* free memory resource, if any */ 189 if (sc->sc_otg.sc_io_res) { 190 bus_release_resource(dev, SYS_RES_MEMORY, 0, 191 sc->sc_otg.sc_io_res); 192 sc->sc_otg.sc_io_res = NULL; 193 } 194 usb_bus_mem_free_all(&sc->sc_otg.sc_bus, NULL); 195 196 return (0); 197 } 198 199 static device_method_t dwc_otg_methods[] = { 200 /* Device interface */ 201 DEVMETHOD(device_probe, dwc_otg_probe), 202 DEVMETHOD(device_attach, dwc_otg_attach), 203 DEVMETHOD(device_detach, dwc_otg_detach), 204 DEVMETHOD(device_suspend, bus_generic_suspend), 205 DEVMETHOD(device_resume, bus_generic_resume), 206 DEVMETHOD(device_shutdown, bus_generic_shutdown), 207 208 DEVMETHOD_END 209 }; 210 211 driver_t dwc_otg_driver = { 212 .name = "dwcotg", 213 .methods = dwc_otg_methods, 214 .size = sizeof(struct dwc_otg_fdt_softc), 215 }; 216 217 DRIVER_MODULE(dwcotg, simplebus, dwc_otg_driver, 0, 0); 218 MODULE_DEPEND(dwcotg, usb, 1, 1, 1); 219