imxusb.c revision 1.9
1 /* $NetBSD: imxusb.c,v 1.9 2015/09/10 04:00:32 hkenken Exp $ */ 2 /* 3 * Copyright (c) 2009, 2010 Genetec Corporation. All rights reserved. 4 * Written by Hashimoto Kenichi and Hiroyuki Bessho for Genetec Corporation. 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 GENETEC CORPORATION ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: imxusb.c,v 1.9 2015/09/10 04:00:32 hkenken Exp $"); 29 30 #include "opt_imx.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/conf.h> 35 #include <sys/kernel.h> 36 #include <sys/device.h> 37 #include <sys/intr.h> 38 #include <sys/bus.h> 39 40 #include <dev/usb/usb.h> 41 #include <dev/usb/usbdi.h> 42 #include <dev/usb/usbdivar.h> 43 #include <dev/usb/usb_mem.h> 44 45 #include <dev/usb/ehcireg.h> 46 #include <dev/usb/ehcivar.h> 47 48 #include <arm/pic/picvar.h> /* XXX: for intr_establish! */ 49 50 #include <arm/imx/imxusbreg.h> 51 #include <arm/imx/imxusbvar.h> 52 #include <arm/imx/imxgpiovar.h> 53 #include "locators.h" 54 55 #include <dev/usb/ulpireg.h> /* for test */ 56 57 static int imxehci_match(device_t, cfdata_t, void *); 58 static void imxehci_attach(device_t, device_t, void *); 59 60 uint8_t imxusb_ulpi_read(struct imxehci_softc *sc, int addr); 61 void imxusb_ulpi_write(struct imxehci_softc *sc, int addr, uint8_t data); 62 static void ulpi_reset(struct imxehci_softc *sc); 63 64 static void imxehci_select_interface(struct imxehci_softc *, enum imx_usb_if); 65 static void imxehci_init(struct ehci_softc *); 66 67 /* attach structures */ 68 CFATTACH_DECL_NEW(imxehci, sizeof(struct imxehci_softc), 69 imxehci_match, imxehci_attach, NULL, NULL); 70 71 static int 72 imxehci_match(device_t parent, cfdata_t cf, void *aux) 73 { 74 struct imxusbc_attach_args *aa = aux; 75 76 if (aa->aa_unit < 0 || 3 < aa->aa_unit) { 77 return 0; 78 } 79 80 return 1; 81 } 82 83 static void 84 imxehci_attach(device_t parent, device_t self, void *aux) 85 { 86 struct imxusbc_attach_args *aa = aux; 87 struct imxusbc_softc *usbc = device_private(parent); 88 struct imxehci_softc *sc = device_private(self); 89 ehci_softc_t *hsc = &sc->sc_hsc; 90 bus_space_tag_t iot; 91 uint16_t hcirev; 92 usbd_status r; 93 uint32_t id, hwhost, hwdevice; 94 const char *comma; 95 96 sc->sc_hsc.sc_dev = self; 97 iot = sc->sc_iot = sc->sc_hsc.iot = aa->aa_iot; 98 sc->sc_unit = aa->aa_unit; 99 sc->sc_usbc = usbc; 100 hsc->sc_bus.hci_private = sc; 101 hsc->sc_flags |= EHCIF_ETTF; 102 hsc->sc_vendor_init = imxehci_init; 103 104 aprint_naive("\n"); 105 aprint_normal(": i.MX USB Controller\n"); 106 107 /* per unit registers */ 108 if (bus_space_subregion(iot, aa->aa_ioh, 109 aa->aa_unit * IMXUSB_EHCI_SIZE, IMXUSB_EHCI_SIZE, 110 &sc->sc_ioh) || 111 bus_space_subregion(iot, aa->aa_ioh, 112 aa->aa_unit * IMXUSB_EHCI_SIZE + IMXUSB_EHCIREGS, 113 IMXUSB_EHCI_SIZE - IMXUSB_EHCIREGS, 114 &sc->sc_hsc.ioh)) { 115 116 aprint_error_dev(self, "can't subregion\n"); 117 return; 118 } 119 120 id = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_ID); 121 hcirev = bus_space_read_2(iot, sc->sc_hsc.ioh, EHCI_HCIVERSION); 122 123 aprint_normal_dev(self, 124 "id=%d revision=%d HCI revision=0x%x\n", 125 (int)__SHIFTOUT(id, IMXUSB_ID_ID), 126 (int)__SHIFTOUT(id, IMXUSB_ID_REVISION), 127 hcirev); 128 129 hwhost = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_HWHOST); 130 hwdevice = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_HWDEVICE); 131 132 aprint_normal_dev(self, ""); 133 134 comma = ""; 135 if (hwhost & HWHOST_HC) { 136 int n_ports = 1 + __SHIFTOUT(hwhost, HWHOST_NPORT); 137 aprint_normal("%d host port%s", 138 n_ports, n_ports > 1 ? "s" : ""); 139 comma = ", "; 140 } 141 142 if (hwdevice & HWDEVICE_DC) { 143 int n_endpoints = __SHIFTOUT(hwdevice, HWDEVICE_DEVEP); 144 aprint_normal("%sdevice capable, %d endpoint%s", 145 comma, 146 n_endpoints, n_endpoints > 1 ? "s" : ""); 147 } 148 aprint_normal("\n"); 149 150 sc->sc_hsc.sc_bus.dmatag = aa->aa_dmat; 151 152 sc->sc_hsc.sc_offs = bus_space_read_1(iot, sc->sc_hsc.ioh, 153 EHCI_CAPLENGTH); 154 155 /* Platform dependent setup */ 156 if (usbc->sc_init_md_hook) 157 usbc->sc_init_md_hook(sc); 158 159 imxehci_reset(sc); 160 imxehci_select_interface(sc, sc->sc_iftype); 161 162 if (sc->sc_iftype == IMXUSBC_IF_ULPI) { 163 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, 0); 164 165 aprint_normal_dev(hsc->sc_dev, 166 "ULPI phy VID 0x%04x PID 0x%04x\n", 167 (imxusb_ulpi_read(sc, ULPI_VENDOR_ID_LOW) | 168 imxusb_ulpi_read(sc, ULPI_VENDOR_ID_HIGH) << 8), 169 (imxusb_ulpi_read(sc, ULPI_PRODUCT_ID_LOW) | 170 imxusb_ulpi_read(sc, ULPI_PRODUCT_ID_HIGH) << 8)); 171 172 ulpi_reset(sc); 173 174 } 175 176 if (usbc->sc_setup_md_hook) 177 usbc->sc_setup_md_hook(sc, IMXUSB_HOST); 178 179 if (sc->sc_iftype == IMXUSBC_IF_ULPI) { 180 #if 0 181 if(hsc->sc_bus.usbrev == USBREV_2_0) 182 ulpi_write(hsc, ULPI_FUNCTION_CONTROL + ULPI_REG_CLEAR, (1 << 0)); 183 else 184 ulpi_write(hsc, ULPI_FUNCTION_CONTROL + ULPI_REG_SET, (1 << 2)); 185 #endif 186 187 imxusb_ulpi_write(sc, ULPI_FUNCTION_CONTROL + ULPI_REG_CLEAR, 188 OTG_CONTROL_IDPULLUP); 189 190 imxusb_ulpi_write(sc, ULPI_OTG_CONTROL + ULPI_REG_SET, 191 OTG_CONTROL_USEEXTVBUSIND | 192 OTG_CONTROL_DRVVBUSEXT | 193 OTG_CONTROL_DRVVBUS | 194 OTG_CONTROL_CHRGVBUS 195 ); 196 } 197 198 /* Disable interrupts, so we don't get any spurious ones. */ 199 EOWRITE4(hsc, EHCI_USBINTR, 0); 200 201 intr_establish(aa->aa_irq, IPL_USB, IST_LEVEL, ehci_intr, hsc); 202 203 /* Figure out vendor for root hub descriptor. */ 204 strlcpy(hsc->sc_vendor, "i.MX", sizeof(hsc->sc_vendor)); 205 206 r = ehci_init(hsc); 207 if (r != USBD_NORMAL_COMPLETION) { 208 aprint_error_dev(self, "init failed, error=%d\n", r); 209 return; 210 } 211 212 /* Attach usb device. */ 213 hsc->sc_child = config_found(self, &hsc->sc_bus, usbctlprint); 214 } 215 216 static void 217 imxehci_select_interface(struct imxehci_softc *sc, enum imx_usb_if interface) 218 { 219 uint32_t reg; 220 struct ehci_softc *hsc = &sc->sc_hsc; 221 222 reg = EOREAD4(hsc, EHCI_PORTSC(1)); 223 reg &= ~(PORTSC_PTS | PORTSC_PTW); 224 switch (interface) { 225 case IMXUSBC_IF_UTMI_WIDE: 226 reg |= PORTSC_PTW_16; 227 case IMXUSBC_IF_UTMI: 228 reg |= PORTSC_PTS_UTMI; 229 break; 230 case IMXUSBC_IF_PHILIPS: 231 reg |= PORTSC_PTS_PHILIPS; 232 break; 233 case IMXUSBC_IF_ULPI: 234 reg |= PORTSC_PTS_ULPI; 235 break; 236 case IMXUSBC_IF_SERIAL: 237 reg |= PORTSC_PTS_SERIAL; 238 break; 239 } 240 EOWRITE4(hsc, EHCI_PORTSC(1), reg); 241 } 242 243 static uint32_t 244 ulpi_wakeup(struct imxehci_softc *sc, int tout) 245 { 246 uint32_t ulpi_view; 247 int i = 0; 248 ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); 249 250 if ( !(ulpi_view & ULPI_SS) ) { 251 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 252 IMXUSB_ULPIVIEW, ULPI_WU); 253 for (i = 0; (tout < 0) || (i < tout); i++) { 254 ulpi_view = bus_space_read_4(sc->sc_iot, 255 sc->sc_ioh, IMXUSB_ULPIVIEW); 256 if ( !(ulpi_view & ULPI_WU) ) 257 break; 258 delay(1); 259 }; 260 } 261 262 if ((tout > 0) && (i >= tout)) { 263 aprint_error_dev(sc->sc_hsc.sc_dev, "%s: timeout\n", __func__); 264 } 265 266 return ulpi_view; 267 } 268 269 static uint32_t 270 ulpi_wait(struct imxehci_softc *sc, int tout) 271 { 272 uint32_t ulpi_view; 273 int i; 274 ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); 275 276 for (i = 0; (tout < 0) | (i < tout); i++) { 277 ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 278 IMXUSB_ULPIVIEW); 279 if (!(ulpi_view & ULPI_RUN)) 280 break; 281 delay(1); 282 } 283 284 if ((tout > 0) && (i >= tout)) { 285 aprint_error_dev(sc->sc_hsc.sc_dev, "%s: timeout\n", __func__); 286 } 287 288 return ulpi_view; 289 } 290 291 #define TIMEOUT 100000 292 293 uint8_t 294 imxusb_ulpi_read(struct imxehci_softc *sc, int addr) 295 { 296 uint32_t data; 297 298 ulpi_wakeup(sc, TIMEOUT); 299 300 data = ULPI_RUN | __SHIFTIN(addr, ULPI_ADDR); 301 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, data); 302 303 data = ulpi_wait(sc, TIMEOUT); 304 305 return __SHIFTOUT(data, ULPI_DATRD); 306 } 307 308 void 309 imxusb_ulpi_write(struct imxehci_softc *sc, int addr, uint8_t data) 310 { 311 uint32_t reg; 312 313 ulpi_wakeup(sc, TIMEOUT); 314 315 reg = ULPI_RUN | ULPI_RW | __SHIFTIN(addr, ULPI_ADDR) | __SHIFTIN(data, ULPI_DATWR); 316 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, reg); 317 318 ulpi_wait(sc, TIMEOUT); 319 320 return; 321 } 322 323 #if 0 324 static int 325 ulpi_scratch_test(struct imxehci_softc *sc) 326 { 327 uint32_t ulpi_view; 328 329 ulpi_view = ulpi_wakeup(sc, 1000); 330 if (ulpi_view & ULPI_WU) { 331 return -1; 332 } 333 334 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, 335 (ULPI_RUN | ULPI_RW | 336 (ULPI_SCRATCH << ULPI_ADDR_SHIFT) | 0xAA)); 337 338 ulpi_view = ulpi_wait(sc, 1000); 339 340 if (ulpi_view & ULPI_RUN) { 341 return -1; 342 } 343 344 return 0; 345 } 346 #endif 347 348 static void 349 ulpi_reset(struct imxehci_softc *sc) 350 { 351 uint8_t data; 352 int timo = 1000 * 1000; /* XXXX: 1sec */ 353 354 imxusb_ulpi_write(sc, ULPI_FUNCTION_CONTROL + ULPI_REG_SET, 355 FUNCTION_CONTROL_RESET /*0x20*/); 356 do { 357 data = imxusb_ulpi_read(sc, ULPI_FUNCTION_CONTROL); 358 if (!(data & FUNCTION_CONTROL_RESET)) 359 break; 360 delay(100); 361 timo -= 100; 362 } while (timo > 0); 363 if (timo <= 0) { 364 aprint_error_dev(sc->sc_hsc.sc_dev, "%s: reset failed!!\n", 365 __func__); 366 return; 367 } 368 369 return; 370 } 371 372 void 373 imxehci_reset(struct imxehci_softc *sc) 374 { 375 uint32_t reg; 376 int i; 377 struct ehci_softc *hsc = &sc->sc_hsc; 378 #define RESET_TIMEOUT 100 379 380 reg = EOREAD4(hsc, EHCI_USBCMD); 381 reg &= ~EHCI_CMD_RS; 382 EOWRITE4(hsc, EHCI_USBCMD, reg); 383 384 for (i=0; i < RESET_TIMEOUT; ++i) { 385 reg = EOREAD4(hsc, EHCI_USBCMD); 386 if ((reg & EHCI_CMD_RS) == 0) 387 break; 388 usb_delay_ms(&hsc->sc_bus, 1); 389 } 390 391 EOWRITE4(hsc, EHCI_USBCMD, reg | EHCI_CMD_HCRESET); 392 for (i = 0; i < RESET_TIMEOUT; i++) { 393 reg = EOREAD4(hsc, EHCI_USBCMD); 394 if ((reg & EHCI_CMD_HCRESET) == 0) 395 break; 396 usb_delay_ms(&hsc->sc_bus, 1); 397 } 398 if (i >= RESET_TIMEOUT) { 399 aprint_error_dev(hsc->sc_dev, "reset timeout (%x)\n", reg); 400 } 401 402 usb_delay_ms(&hsc->sc_bus, 100); 403 } 404 405 static void 406 imxehci_init(struct ehci_softc *hsc) 407 { 408 struct imxehci_softc *sc = device_private(hsc->sc_dev); 409 uint32_t reg; 410 411 reg = EOREAD4(hsc, EHCI_PORTSC(1)); 412 reg &= ~(EHCI_PS_CSC | EHCI_PS_PEC | EHCI_PS_OCC); 413 reg |= EHCI_PS_PP | EHCI_PS_PE; 414 EOWRITE4(hsc, EHCI_PORTSC(1), reg); 415 416 reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGSC); 417 reg |= OTGSC_IDPU; 418 /* disable IDIE not to conflict with SSP1_DETECT. */ 419 //reg |= OTGSC_DPIE | OTGSC_IDIE; 420 reg |= OTGSC_DPIE; 421 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGSC, reg); 422 423 reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_USBMODE); 424 reg &= ~USBMODE_CM; 425 reg |= USBMODE_CM_HOST; 426 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_USBMODE, reg); 427 } 428
Indexes created Thu Oct 02 10:09:58 GMT 2025