imxusb.c revision 1.7.2.4
1 /* $NetBSD: imxusb.c,v 1.7.2.4 2015/09/22 12:05:37 skrll 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 1.7.2.4 2015/09/22 12:05:37 skrll 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 uint32_t id, hwhost, hwdevice; 93 const char *comma; 94 95 sc->sc_hsc.sc_dev = self; 96 iot = sc->sc_iot = sc->sc_hsc.iot = aa->aa_iot; 97 sc->sc_unit = aa->aa_unit; 98 sc->sc_usbc = usbc; 99 hsc->sc_bus.ub_hcpriv = sc; 100 hsc->sc_flags |= EHCIF_ETTF; 101 hsc->sc_vendor_init = imxehci_init; 102 103 aprint_naive("\n"); 104 aprint_normal(": i.MX USB Controller\n"); 105 106 /* per unit registers */ 107 if (bus_space_subregion(iot, aa->aa_ioh, 108 aa->aa_unit * IMXUSB_EHCI_SIZE, IMXUSB_EHCI_SIZE, 109 &sc->sc_ioh) || 110 bus_space_subregion(iot, aa->aa_ioh, 111 aa->aa_unit * IMXUSB_EHCI_SIZE + IMXUSB_EHCIREGS, 112 IMXUSB_EHCI_SIZE - IMXUSB_EHCIREGS, 113 &sc->sc_hsc.ioh)) { 114 115 aprint_error_dev(self, "can't subregion\n"); 116 return; 117 } 118 119 id = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_ID); 120 hcirev = bus_space_read_2(iot, sc->sc_hsc.ioh, EHCI_HCIVERSION); 121 122 aprint_normal_dev(self, 123 "id=%d revision=%d HCI revision=0x%x\n", 124 (int)__SHIFTOUT(id, IMXUSB_ID_ID), 125 (int)__SHIFTOUT(id, IMXUSB_ID_REVISION), 126 hcirev); 127 128 hwhost = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_HWHOST); 129 hwdevice = bus_space_read_4(iot, sc->sc_ioh, IMXUSB_HWDEVICE); 130 131 aprint_normal_dev(self, ""); 132 133 comma = ""; 134 if (hwhost & HWHOST_HC) { 135 int n_ports = 1 + __SHIFTOUT(hwhost, HWHOST_NPORT); 136 aprint_normal("%d host port%s", 137 n_ports, n_ports > 1 ? "s" : ""); 138 comma = ", "; 139 } 140 141 if (hwdevice & HWDEVICE_DC) { 142 int n_endpoints = __SHIFTOUT(hwdevice, HWDEVICE_DEVEP); 143 aprint_normal("%sdevice capable, %d endpoint%s", 144 comma, 145 n_endpoints, n_endpoints > 1 ? "s" : ""); 146 } 147 aprint_normal("\n"); 148 149 sc->sc_hsc.sc_bus.ub_dmatag = aa->aa_dmat; 150 151 sc->sc_hsc.sc_offs = bus_space_read_1(iot, sc->sc_hsc.ioh, 152 EHCI_CAPLENGTH); 153 154 /* Platform dependent setup */ 155 if (usbc->sc_init_md_hook) 156 usbc->sc_init_md_hook(sc); 157 158 imxehci_reset(sc); 159 imxehci_select_interface(sc, sc->sc_iftype); 160 161 if (sc->sc_iftype == IMXUSBC_IF_ULPI) { 162 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, 0); 163 164 aprint_normal_dev(hsc->sc_dev, 165 "ULPI phy VID 0x%04x PID 0x%04x\n", 166 (imxusb_ulpi_read(sc, ULPI_VENDOR_ID_LOW) | 167 imxusb_ulpi_read(sc, ULPI_VENDOR_ID_HIGH) << 8), 168 (imxusb_ulpi_read(sc, ULPI_PRODUCT_ID_LOW) | 169 imxusb_ulpi_read(sc, ULPI_PRODUCT_ID_HIGH) << 8)); 170 171 ulpi_reset(sc); 172 173 } 174 175 if (usbc->sc_setup_md_hook) 176 usbc->sc_setup_md_hook(sc, IMXUSB_HOST); 177 178 if (sc->sc_iftype == IMXUSBC_IF_ULPI) { 179 #if 0 180 if(hsc->sc_bus.ub_revision == USBREV_2_0) 181 ulpi_write(hsc, ULPI_FUNCTION_CONTROL + ULPI_REG_CLEAR, (1 << 0)); 182 else 183 ulpi_write(hsc, ULPI_FUNCTION_CONTROL + ULPI_REG_SET, (1 << 2)); 184 #endif 185 186 imxusb_ulpi_write(sc, ULPI_FUNCTION_CONTROL + ULPI_REG_CLEAR, 187 OTG_CONTROL_IDPULLUP); 188 189 imxusb_ulpi_write(sc, ULPI_OTG_CONTROL + ULPI_REG_SET, 190 OTG_CONTROL_USEEXTVBUSIND | 191 OTG_CONTROL_DRVVBUSEXT | 192 OTG_CONTROL_DRVVBUS | 193 OTG_CONTROL_CHRGVBUS 194 ); 195 } 196 197 /* Disable interrupts, so we don't get any spurious ones. */ 198 EOWRITE4(hsc, EHCI_USBINTR, 0); 199 200 intr_establish(aa->aa_irq, IPL_USB, IST_LEVEL, ehci_intr, hsc); 201 202 /* Figure out vendor for root hub descriptor. */ 203 strlcpy(hsc->sc_vendor, "i.MX", sizeof(hsc->sc_vendor)); 204 205 int err = ehci_init(hsc); 206 if (err) { 207 aprint_error_dev(self, "init failed, error=%d\n", err); 208 return; 209 } 210 211 /* Attach usb device. */ 212 hsc->sc_child = config_found(self, &hsc->sc_bus, usbctlprint); 213 } 214 215 static void 216 imxehci_select_interface(struct imxehci_softc *sc, enum imx_usb_if interface) 217 { 218 uint32_t reg; 219 struct ehci_softc *hsc = &sc->sc_hsc; 220 221 reg = EOREAD4(hsc, EHCI_PORTSC(1)); 222 reg &= ~(PORTSC_PTS | PORTSC_PTW); 223 switch (interface) { 224 case IMXUSBC_IF_UTMI_WIDE: 225 reg |= PORTSC_PTW_16; 226 case IMXUSBC_IF_UTMI: 227 reg |= PORTSC_PTS_UTMI; 228 break; 229 case IMXUSBC_IF_PHILIPS: 230 reg |= PORTSC_PTS_PHILIPS; 231 break; 232 case IMXUSBC_IF_ULPI: 233 reg |= PORTSC_PTS_ULPI; 234 break; 235 case IMXUSBC_IF_SERIAL: 236 reg |= PORTSC_PTS_SERIAL; 237 break; 238 } 239 EOWRITE4(hsc, EHCI_PORTSC(1), reg); 240 } 241 242 static uint32_t 243 ulpi_wakeup(struct imxehci_softc *sc, int tout) 244 { 245 uint32_t ulpi_view; 246 int i = 0; 247 ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); 248 249 if ( !(ulpi_view & ULPI_SS) ) { 250 bus_space_write_4(sc->sc_iot, sc->sc_ioh, 251 IMXUSB_ULPIVIEW, ULPI_WU); 252 for (i = 0; (tout < 0) || (i < tout); i++) { 253 ulpi_view = bus_space_read_4(sc->sc_iot, 254 sc->sc_ioh, IMXUSB_ULPIVIEW); 255 if ( !(ulpi_view & ULPI_WU) ) 256 break; 257 delay(1); 258 }; 259 } 260 261 if ((tout > 0) && (i >= tout)) { 262 aprint_error_dev(sc->sc_hsc.sc_dev, "%s: timeout\n", __func__); 263 } 264 265 return ulpi_view; 266 } 267 268 static uint32_t 269 ulpi_wait(struct imxehci_softc *sc, int tout) 270 { 271 uint32_t ulpi_view; 272 int i; 273 ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW); 274 275 for (i = 0; (tout < 0) | (i < tout); i++) { 276 ulpi_view = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 277 IMXUSB_ULPIVIEW); 278 if (!(ulpi_view & ULPI_RUN)) 279 break; 280 delay(1); 281 } 282 283 if ((tout > 0) && (i >= tout)) { 284 aprint_error_dev(sc->sc_hsc.sc_dev, "%s: timeout\n", __func__); 285 } 286 287 return ulpi_view; 288 } 289 290 #define TIMEOUT 100000 291 292 uint8_t 293 imxusb_ulpi_read(struct imxehci_softc *sc, int addr) 294 { 295 uint32_t data; 296 297 ulpi_wakeup(sc, TIMEOUT); 298 299 data = ULPI_RUN | __SHIFTIN(addr, ULPI_ADDR); 300 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, data); 301 302 data = ulpi_wait(sc, TIMEOUT); 303 304 return __SHIFTOUT(data, ULPI_DATRD); 305 } 306 307 void 308 imxusb_ulpi_write(struct imxehci_softc *sc, int addr, uint8_t data) 309 { 310 uint32_t reg; 311 312 ulpi_wakeup(sc, TIMEOUT); 313 314 reg = ULPI_RUN | ULPI_RW | __SHIFTIN(addr, ULPI_ADDR) | __SHIFTIN(data, ULPI_DATWR); 315 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, reg); 316 317 ulpi_wait(sc, TIMEOUT); 318 319 return; 320 } 321 322 #if 0 323 static int 324 ulpi_scratch_test(struct imxehci_softc *sc) 325 { 326 uint32_t ulpi_view; 327 328 ulpi_view = ulpi_wakeup(sc, 1000); 329 if (ulpi_view & ULPI_WU) { 330 return -1; 331 } 332 333 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_ULPIVIEW, 334 (ULPI_RUN | ULPI_RW | 335 (ULPI_SCRATCH << ULPI_ADDR_SHIFT) | 0xAA)); 336 337 ulpi_view = ulpi_wait(sc, 1000); 338 339 if (ulpi_view & ULPI_RUN) { 340 return -1; 341 } 342 343 return 0; 344 } 345 #endif 346 347 static void 348 ulpi_reset(struct imxehci_softc *sc) 349 { 350 uint8_t data; 351 int timo = 1000 * 1000; /* XXXX: 1sec */ 352 353 imxusb_ulpi_write(sc, ULPI_FUNCTION_CONTROL + ULPI_REG_SET, 354 FUNCTION_CONTROL_RESET /*0x20*/); 355 do { 356 data = imxusb_ulpi_read(sc, ULPI_FUNCTION_CONTROL); 357 if (!(data & FUNCTION_CONTROL_RESET)) 358 break; 359 delay(100); 360 timo -= 100; 361 } while (timo > 0); 362 if (timo <= 0) { 363 aprint_error_dev(sc->sc_hsc.sc_dev, "%s: reset failed!!\n", 364 __func__); 365 return; 366 } 367 368 return; 369 } 370 371 void 372 imxehci_reset(struct imxehci_softc *sc) 373 { 374 uint32_t reg; 375 int i; 376 struct ehci_softc *hsc = &sc->sc_hsc; 377 #define RESET_TIMEOUT 100 378 379 reg = EOREAD4(hsc, EHCI_USBCMD); 380 reg &= ~EHCI_CMD_RS; 381 EOWRITE4(hsc, EHCI_USBCMD, reg); 382 383 for (i=0; i < RESET_TIMEOUT; ++i) { 384 reg = EOREAD4(hsc, EHCI_USBCMD); 385 if ((reg & EHCI_CMD_RS) == 0) 386 break; 387 usb_delay_ms(&hsc->sc_bus, 1); 388 } 389 390 EOWRITE4(hsc, EHCI_USBCMD, reg | EHCI_CMD_HCRESET); 391 for (i = 0; i < RESET_TIMEOUT; i++) { 392 reg = EOREAD4(hsc, EHCI_USBCMD); 393 if ((reg & EHCI_CMD_HCRESET) == 0) 394 break; 395 usb_delay_ms(&hsc->sc_bus, 1); 396 } 397 if (i >= RESET_TIMEOUT) { 398 aprint_error_dev(hsc->sc_dev, "reset timeout (%x)\n", reg); 399 } 400 401 usb_delay_ms(&hsc->sc_bus, 100); 402 } 403 404 static void 405 imxehci_init(struct ehci_softc *hsc) 406 { 407 struct imxehci_softc *sc = device_private(hsc->sc_dev); 408 uint32_t reg; 409 410 reg = EOREAD4(hsc, EHCI_PORTSC(1)); 411 reg &= ~(EHCI_PS_CSC | EHCI_PS_PEC | EHCI_PS_OCC); 412 reg |= EHCI_PS_PP | EHCI_PS_PE; 413 EOWRITE4(hsc, EHCI_PORTSC(1), reg); 414 415 reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGSC); 416 reg |= OTGSC_IDPU; 417 /* disable IDIE not to conflict with SSP1_DETECT. */ 418 //reg |= OTGSC_DPIE | OTGSC_IDIE; 419 reg |= OTGSC_DPIE; 420 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_OTGSC, reg); 421 422 reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IMXUSB_USBMODE); 423 reg &= ~USBMODE_CM; 424 reg |= USBMODE_CM_HOST; 425 bus_space_write_4(sc->sc_iot, sc->sc_ioh, IMXUSB_USBMODE, reg); 426 } 427
Indexes created Thu Oct 02 10:09:58 GMT 2025