1 /*- 2 * Copyright (c) 2016 Michal Meloun <mmel@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, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 /* 29 * EHCI driver for Tegra SoCs. 30 */ 31 #include "opt_bus.h" 32 #include "opt_platform.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/condvar.h> 40 #include <sys/rman.h> 41 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 45 #include <dev/clk/clk.h> 46 #include <dev/hwreset/hwreset.h> 47 #include <dev/phy/phy.h> 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 #include <dev/usb/usb.h> 51 #include <dev/usb/usbdi.h> 52 #include <dev/usb/usb_busdma.h> 53 #include <dev/usb/usb_process.h> 54 #include <dev/usb/usb_controller.h> 55 #include <dev/usb/usb_bus.h> 56 #include <dev/usb/controller/ehci.h> 57 #include <dev/usb/controller/ehcireg.h> 58 59 #include "usbdevs.h" 60 61 #define TEGRA_EHCI_REG_OFF 0x100 62 #define TEGRA_EHCI_REG_SIZE 0x100 63 64 /* Compatible devices. */ 65 #define TEGRA124_EHCI 1 66 #define TEGRA210_EHCI 2 67 static struct ofw_compat_data compat_data[] = { 68 {"nvidia,tegra124-ehci", (uintptr_t)TEGRA124_EHCI}, 69 {"nvidia,tegra210-ehci", (uintptr_t)TEGRA210_EHCI}, 70 {NULL, 0}, 71 }; 72 73 struct tegra_ehci_softc { 74 ehci_softc_t ehci_softc; 75 device_t dev; 76 struct resource *ehci_mem_res; /* EHCI core regs. */ 77 struct resource *ehci_irq_res; /* EHCI core IRQ. */ 78 int usb_alloc_called; 79 clk_t clk; 80 phy_t phy; 81 hwreset_t reset; 82 }; 83 84 static void 85 tegra_ehci_post_reset(struct ehci_softc *ehci_softc) 86 { 87 uint32_t usbmode; 88 89 /* Force HOST mode. */ 90 usbmode = EOREAD4(ehci_softc, EHCI_USBMODE_LPM); 91 usbmode &= ~EHCI_UM_CM; 92 usbmode |= EHCI_UM_CM_HOST; 93 device_printf(ehci_softc->sc_bus.bdev, "set host controller mode\n"); 94 EOWRITE4(ehci_softc, EHCI_USBMODE_LPM, usbmode); 95 } 96 97 static int 98 tegra_ehci_probe(device_t dev) 99 { 100 101 if (!ofw_bus_status_okay(dev)) 102 return (ENXIO); 103 104 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) { 105 device_set_desc(dev, "Nvidia Tegra EHCI controller"); 106 return (BUS_PROBE_DEFAULT); 107 } 108 return (ENXIO); 109 } 110 111 static int 112 tegra_ehci_detach(device_t dev) 113 { 114 struct tegra_ehci_softc *sc; 115 ehci_softc_t *esc; 116 117 sc = device_get_softc(dev); 118 119 esc = &sc->ehci_softc; 120 if (sc->clk != NULL) 121 clk_release(sc->clk); 122 if (esc->sc_bus.bdev != NULL) 123 device_delete_child(dev, esc->sc_bus.bdev); 124 if (esc->sc_flags & EHCI_SCFLG_DONEINIT) 125 ehci_detach(esc); 126 if (esc->sc_intr_hdl != NULL) 127 bus_teardown_intr(dev, esc->sc_irq_res, 128 esc->sc_intr_hdl); 129 if (sc->ehci_irq_res != NULL) 130 bus_release_resource(dev, SYS_RES_IRQ, 0, 131 sc->ehci_irq_res); 132 if (sc->ehci_mem_res != NULL) 133 bus_release_resource(dev, SYS_RES_MEMORY, 0, 134 sc->ehci_mem_res); 135 if (sc->usb_alloc_called) 136 usb_bus_mem_free_all(&esc->sc_bus, &ehci_iterate_hw_softc); 137 138 /* During module unload there are lots of children leftover. */ 139 device_delete_children(dev); 140 141 return (0); 142 } 143 144 static int 145 tegra_ehci_attach(device_t dev) 146 { 147 struct tegra_ehci_softc *sc; 148 ehci_softc_t *esc; 149 int rv, rid; 150 uint64_t freq; 151 152 sc = device_get_softc(dev); 153 sc->dev = dev; 154 esc = &sc->ehci_softc; 155 156 /* Allocate resources. */ 157 rid = 0; 158 sc->ehci_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 159 RF_ACTIVE | RF_SHAREABLE); 160 if (sc->ehci_mem_res == NULL) { 161 device_printf(dev, "Cannot allocate memory resources\n"); 162 rv = ENXIO; 163 goto out; 164 } 165 166 rid = 0; 167 sc->ehci_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 168 RF_ACTIVE); 169 if (sc->ehci_irq_res == NULL) { 170 device_printf(dev, "Cannot allocate IRQ resources\n"); 171 rv = ENXIO; 172 goto out; 173 } 174 175 rv = hwreset_get_by_ofw_name(dev, 0, "usb", &sc->reset); 176 if (rv != 0) { 177 device_printf(dev, "Cannot get reset\n"); 178 rv = ENXIO; 179 goto out; 180 } 181 182 rv = phy_get_by_ofw_property(sc->dev, 0, "nvidia,phy", &sc->phy); 183 if (rv != 0) { 184 device_printf(sc->dev, "Cannot get 'nvidia,phy' phy\n"); 185 rv = ENXIO; 186 goto out; 187 } 188 189 rv = clk_get_by_ofw_index(sc->dev, 0, 0, &sc->clk); 190 if (rv != 0) { 191 device_printf(dev, "Cannot get clock\n"); 192 goto out; 193 } 194 195 rv = clk_enable(sc->clk); 196 if (rv != 0) { 197 device_printf(dev, "Cannot enable clock\n"); 198 goto out; 199 } 200 201 freq = 0; 202 rv = clk_get_freq(sc->clk, &freq); 203 if (rv != 0) { 204 device_printf(dev, "Cannot get clock frequency\n"); 205 goto out; 206 } 207 208 rv = hwreset_deassert(sc->reset); 209 if (rv != 0) { 210 device_printf(dev, "Cannot clear reset: %d\n", rv); 211 rv = ENXIO; 212 goto out; 213 } 214 215 rv = phy_enable(sc->phy); 216 if (rv != 0) { 217 device_printf(dev, "Cannot enable phy: %d\n", rv); 218 goto out; 219 } 220 221 /* Fill data for EHCI driver. */ 222 esc->sc_vendor_get_port_speed = ehci_get_port_speed_hostc; 223 esc->sc_vendor_post_reset = tegra_ehci_post_reset; 224 esc->sc_io_tag = rman_get_bustag(sc->ehci_mem_res); 225 esc->sc_bus.parent = dev; 226 esc->sc_bus.devices = esc->sc_devices; 227 esc->sc_bus.devices_max = EHCI_MAX_DEVICES; 228 esc->sc_bus.dma_bits = 32; 229 230 /* Allocate all DMA memory. */ 231 rv = usb_bus_mem_alloc_all(&esc->sc_bus, USB_GET_DMA_TAG(dev), 232 &ehci_iterate_hw_softc); 233 sc->usb_alloc_called = 1; 234 if (rv != 0) { 235 device_printf(dev, "usb_bus_mem_alloc_all() failed\n"); 236 rv = ENOMEM; 237 goto out; 238 } 239 240 /* 241 * Set handle to USB related registers subregion used by 242 * generic EHCI driver. 243 */ 244 rv = bus_space_subregion(esc->sc_io_tag, 245 rman_get_bushandle(sc->ehci_mem_res), 246 TEGRA_EHCI_REG_OFF, TEGRA_EHCI_REG_SIZE, &esc->sc_io_hdl); 247 if (rv != 0) { 248 device_printf(dev, "Could not create USB memory subregion\n"); 249 rv = ENXIO; 250 goto out; 251 } 252 253 /* Setup interrupt handler. */ 254 rv = bus_setup_intr(dev, sc->ehci_irq_res, INTR_TYPE_BIO | INTR_MPSAFE, 255 NULL, (driver_intr_t *)ehci_interrupt, esc, &esc->sc_intr_hdl); 256 if (rv != 0) { 257 device_printf(dev, "Could not setup IRQ\n"); 258 goto out; 259 } 260 261 /* Add USB bus device. */ 262 esc->sc_bus.bdev = device_add_child(dev, "usbus", DEVICE_UNIT_ANY); 263 if (esc->sc_bus.bdev == NULL) { 264 device_printf(dev, "Could not add USB device\n"); 265 goto out; 266 } 267 device_set_ivars(esc->sc_bus.bdev, &esc->sc_bus); 268 269 esc->sc_id_vendor = USB_VENDOR_FREESCALE; 270 strlcpy(esc->sc_vendor, "Nvidia", sizeof(esc->sc_vendor)); 271 272 /* Set flags that affect ehci_init() behavior. */ 273 esc->sc_flags |= EHCI_SCFLG_TT; 274 esc->sc_flags |= EHCI_SCFLG_NORESTERM; 275 rv = ehci_init(esc); 276 if (rv != 0) { 277 device_printf(dev, "USB init failed: %d\n", 278 rv); 279 goto out; 280 } 281 esc->sc_flags |= EHCI_SCFLG_DONEINIT; 282 283 /* Probe the bus. */ 284 rv = device_probe_and_attach(esc->sc_bus.bdev); 285 if (rv != 0) { 286 device_printf(dev, 287 "device_probe_and_attach() failed\n"); 288 goto out; 289 } 290 return (0); 291 292 out: 293 tegra_ehci_detach(dev); 294 return (rv); 295 } 296 297 static device_method_t ehci_methods[] = { 298 /* Device interface */ 299 DEVMETHOD(device_probe, tegra_ehci_probe), 300 DEVMETHOD(device_attach, tegra_ehci_attach), 301 DEVMETHOD(device_detach, tegra_ehci_detach), 302 DEVMETHOD(device_suspend, bus_generic_suspend), 303 DEVMETHOD(device_resume, bus_generic_resume), 304 DEVMETHOD(device_shutdown, bus_generic_shutdown), 305 306 /* Bus interface */ 307 DEVMETHOD(bus_print_child, bus_generic_print_child), 308 309 DEVMETHOD_END 310 }; 311 312 static DEFINE_CLASS_0(ehci, ehci_driver, ehci_methods, 313 sizeof(struct tegra_ehci_softc)); 314 DRIVER_MODULE(tegra_ehci, simplebus, ehci_driver, NULL, NULL); 315 MODULE_DEPEND(tegra_ehci, usb, 1, 1, 1); 316