1 /*- 2 * Copyright (c) 2006 M. Warner Losh. All rights reserved. 3 * Copyright (c) 2016 Emmanuel Vadot <manu@freebsd.org> 4 * All rights reserved. 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 /* 29 * Generic OHCI driver based on AT91 OHCI 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/rman.h> 39 #include <sys/condvar.h> 40 #include <sys/kernel.h> 41 #include <sys/module.h> 42 43 #include <machine/bus.h> 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.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 #ifdef EXT_RESOURCES 61 #include <dev/extres/clk/clk.h> 62 #include <dev/extres/hwreset/hwreset.h> 63 #include <dev/extres/phy/phy.h> 64 #endif 65 66 #include "generic_usb_if.h" 67 68 #ifdef EXT_RESOURCES 69 struct clk_list { 70 TAILQ_ENTRY(clk_list) next; 71 clk_t clk; 72 }; 73 #endif 74 75 struct generic_ohci_softc { 76 ohci_softc_t ohci_sc; 77 78 #ifdef EXT_RESOURCES 79 hwreset_t rst; 80 phy_t phy; 81 TAILQ_HEAD(, clk_list) clk_list; 82 #endif 83 }; 84 85 static int generic_ohci_detach(device_t); 86 87 static int 88 generic_ohci_probe(device_t dev) 89 { 90 91 if (!ofw_bus_status_okay(dev)) 92 return (ENXIO); 93 94 if (!ofw_bus_is_compatible(dev, "generic-ohci")) 95 return (ENXIO); 96 97 device_set_desc(dev, "Generic OHCI Controller"); 98 99 return (BUS_PROBE_DEFAULT); 100 } 101 102 static int 103 generic_ohci_attach(device_t dev) 104 { 105 struct generic_ohci_softc *sc = device_get_softc(dev); 106 int err, rid; 107 #ifdef EXT_RESOURCES 108 int off; 109 struct clk_list *clkp; 110 clk_t clk; 111 #endif 112 113 sc->ohci_sc.sc_bus.parent = dev; 114 sc->ohci_sc.sc_bus.devices = sc->ohci_sc.sc_devices; 115 sc->ohci_sc.sc_bus.devices_max = OHCI_MAX_DEVICES; 116 sc->ohci_sc.sc_bus.dma_bits = 32; 117 118 /* get all DMA memory */ 119 if (usb_bus_mem_alloc_all(&sc->ohci_sc.sc_bus, 120 USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) { 121 return (ENOMEM); 122 } 123 124 rid = 0; 125 sc->ohci_sc.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 126 &rid, RF_ACTIVE); 127 if (sc->ohci_sc.sc_io_res == 0) { 128 err = ENOMEM; 129 goto error; 130 } 131 132 sc->ohci_sc.sc_io_tag = rman_get_bustag(sc->ohci_sc.sc_io_res); 133 sc->ohci_sc.sc_io_hdl = rman_get_bushandle(sc->ohci_sc.sc_io_res); 134 sc->ohci_sc.sc_io_size = rman_get_size(sc->ohci_sc.sc_io_res); 135 136 rid = 0; 137 sc->ohci_sc.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 138 RF_ACTIVE); 139 if (sc->ohci_sc.sc_irq_res == 0) { 140 err = ENXIO; 141 goto error; 142 } 143 sc->ohci_sc.sc_bus.bdev = device_add_child(dev, "usbus", -1); 144 if (sc->ohci_sc.sc_bus.bdev == 0) { 145 err = ENXIO; 146 goto error; 147 } 148 device_set_ivars(sc->ohci_sc.sc_bus.bdev, &sc->ohci_sc.sc_bus); 149 150 strlcpy(sc->ohci_sc.sc_vendor, "Generic", 151 sizeof(sc->ohci_sc.sc_vendor)); 152 153 err = bus_setup_intr(dev, sc->ohci_sc.sc_irq_res, 154 INTR_TYPE_BIO | INTR_MPSAFE, NULL, 155 (driver_intr_t *)ohci_interrupt, sc, &sc->ohci_sc.sc_intr_hdl); 156 if (err) { 157 sc->ohci_sc.sc_intr_hdl = NULL; 158 goto error; 159 } 160 161 #ifdef EXT_RESOURCES 162 TAILQ_INIT(&sc->clk_list); 163 /* Enable clock */ 164 for (off = 0; clk_get_by_ofw_index(dev, 0, off, &clk) == 0; off++) { 165 err = clk_enable(clk); 166 if (err != 0) { 167 device_printf(dev, "Could not enable clock %s\n", 168 clk_get_name(clk)); 169 goto error; 170 } 171 clkp = malloc(sizeof(*clkp), M_DEVBUF, M_WAITOK | M_ZERO); 172 clkp->clk = clk; 173 TAILQ_INSERT_TAIL(&sc->clk_list, clkp, next); 174 } 175 176 /* De-assert reset */ 177 if (hwreset_get_by_ofw_idx(dev, 0, 0, &sc->rst) == 0) { 178 err = hwreset_deassert(sc->rst); 179 if (err != 0) { 180 device_printf(dev, "Could not de-assert reset %d\n", 181 off); 182 goto error; 183 } 184 } 185 186 /* Enable phy */ 187 if (phy_get_by_ofw_name(dev, 0, "usb", &sc->phy) == 0) { 188 err = phy_enable(sc->phy); 189 if (err != 0) { 190 device_printf(dev, "Could not enable phy\n"); 191 goto error; 192 } 193 } 194 #endif 195 196 if (GENERIC_USB_INIT(dev) != 0) { 197 err = ENXIO; 198 goto error; 199 } 200 201 err = ohci_init(&sc->ohci_sc); 202 if (err == 0) 203 err = device_probe_and_attach(sc->ohci_sc.sc_bus.bdev); 204 if (err) 205 goto error; 206 207 return (0); 208 error: 209 generic_ohci_detach(dev); 210 return (err); 211 } 212 213 static int 214 generic_ohci_detach(device_t dev) 215 { 216 struct generic_ohci_softc *sc = device_get_softc(dev); 217 int err; 218 #ifdef EXT_RESOURCES 219 struct clk_list *clk, *clk_tmp; 220 #endif 221 222 /* during module unload there are lots of children leftover */ 223 device_delete_children(dev); 224 225 /* 226 * Put the controller into reset, then disable clocks and do 227 * the MI tear down. We have to disable the clocks/hardware 228 * after we do the rest of the teardown. We also disable the 229 * clocks in the opposite order we acquire them, but that 230 * doesn't seem to be absolutely necessary. We free up the 231 * clocks after we disable them, so the system could, in 232 * theory, reuse them. 233 */ 234 bus_space_write_4(sc->ohci_sc.sc_io_tag, sc->ohci_sc.sc_io_hdl, 235 OHCI_CONTROL, 0); 236 237 if (sc->ohci_sc.sc_irq_res && sc->ohci_sc.sc_intr_hdl) { 238 /* 239 * only call ohci_detach() after ohci_init() 240 */ 241 ohci_detach(&sc->ohci_sc); 242 243 err = bus_teardown_intr(dev, sc->ohci_sc.sc_irq_res, 244 sc->ohci_sc.sc_intr_hdl); 245 sc->ohci_sc.sc_intr_hdl = NULL; 246 } 247 if (sc->ohci_sc.sc_irq_res) { 248 bus_release_resource(dev, SYS_RES_IRQ, 0, 249 sc->ohci_sc.sc_irq_res); 250 sc->ohci_sc.sc_irq_res = NULL; 251 } 252 if (sc->ohci_sc.sc_io_res) { 253 bus_release_resource(dev, SYS_RES_MEMORY, 0, 254 sc->ohci_sc.sc_io_res); 255 sc->ohci_sc.sc_io_res = NULL; 256 } 257 usb_bus_mem_free_all(&sc->ohci_sc.sc_bus, &ohci_iterate_hw_softc); 258 259 #ifdef EXT_RESOURCES 260 /* Disable phy */ 261 if (sc->phy) { 262 err = phy_disable(sc->phy); 263 if (err != 0) 264 device_printf(dev, "Could not disable phy\n"); 265 phy_release(sc->phy); 266 } 267 268 /* Disable clock */ 269 TAILQ_FOREACH_SAFE(clk, &sc->clk_list, next, clk_tmp) { 270 err = clk_disable(clk->clk); 271 if (err != 0) 272 device_printf(dev, "Could not disable clock %s\n", 273 clk_get_name(clk->clk)); 274 err = clk_release(clk->clk); 275 if (err != 0) 276 device_printf(dev, "Could not release clock %s\n", 277 clk_get_name(clk->clk)); 278 TAILQ_REMOVE(&sc->clk_list, clk, next); 279 free(clk, M_DEVBUF); 280 } 281 282 /* De-assert reset */ 283 if (sc->rst) { 284 err = hwreset_assert(sc->rst); 285 if (err != 0) 286 device_printf(dev, "Could not assert reset\n"); 287 hwreset_release(sc->rst); 288 } 289 #endif 290 291 if (GENERIC_USB_DEINIT(dev) != 0) 292 return (ENXIO); 293 294 return (0); 295 } 296 297 static device_method_t generic_ohci_methods[] = { 298 /* Device interface */ 299 DEVMETHOD(device_probe, generic_ohci_probe), 300 DEVMETHOD(device_attach, generic_ohci_attach), 301 DEVMETHOD(device_detach, generic_ohci_detach), 302 303 DEVMETHOD(device_suspend, bus_generic_suspend), 304 DEVMETHOD(device_resume, bus_generic_resume), 305 DEVMETHOD(device_shutdown, bus_generic_shutdown), 306 307 DEVMETHOD_END 308 }; 309 310 driver_t generic_ohci_driver = { 311 .name = "ohci", 312 .methods = generic_ohci_methods, 313 .size = sizeof(struct generic_ohci_softc), 314 }; 315 316 static devclass_t generic_ohci_devclass; 317 318 DRIVER_MODULE(ohci, simplebus, generic_ohci_driver, 319 generic_ohci_devclass, 0, 0); 320 MODULE_DEPEND(ohci, usb, 1, 1, 1); 321