1 /* $NetBSD: umcs.c,v 1.10 2016/07/07 06:55:42 msaitoh Exp $ */ 2 /* $FreeBSD: head/sys/dev/usb/serial/umcs.c 260559 2014-01-12 11:44:28Z hselasky $ */ 3 4 /*- 5 * Copyright (c) 2010 Lev Serebryakov <lev@FreeBSD.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* 31 * This driver supports several multiport USB-to-RS232 serial adapters driven 32 * by MosChip mos7820 and mos7840, bridge chips. 33 * The adapters are sold under many different brand names. 34 * 35 * Datasheets are available at MosChip www site at 36 * http://www.moschip.com. The datasheets don't contain full 37 * programming information for the chip. 38 * 39 * It is nornal to have only two enabled ports in devices, based on 40 * quad-port mos7840. 41 * 42 */ 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: umcs.c,v 1.10 2016/07/07 06:55:42 msaitoh Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/atomic.h> 49 #include <sys/kernel.h> 50 #include <sys/conf.h> 51 #include <sys/tty.h> 52 #include <sys/device.h> 53 #include <sys/kmem.h> 54 55 #include <dev/usb/usb.h> 56 #include <dev/usb/usbdi.h> 57 #include <dev/usb/usbdi_util.h> 58 #include <dev/usb/usbdevs.h> 59 60 #include <dev/usb/usbdevs.h> 61 #include <dev/usb/ucomvar.h> 62 63 #include "umcs.h" 64 65 #if 0 66 #define DPRINTF(ARG) printf ARG 67 #else 68 #define DPRINTF(ARG) 69 #endif 70 71 /* 72 * Two-port devices (both with 7820 chip and 7840 chip configured as two-port) 73 * have ports 0 and 2, with ports 1 and 3 omitted. 74 * So, PHYSICAL port numbers on two-port device will be 0 and 2. 75 * 76 * We use an array of the following struct, indexed by ucom port index, 77 * and include the physical port number in it. 78 */ 79 struct umcs7840_softc_oneport { 80 device_t sc_port_ucom; /* ucom subdevice */ 81 unsigned int sc_port_phys; /* physical port number */ 82 uint8_t sc_port_lcr; /* local line control register */ 83 uint8_t sc_port_mcr; /* local modem control register */ 84 }; 85 86 struct umcs7840_softc { 87 device_t sc_dev; /* ourself */ 88 struct usbd_interface *sc_iface; /* the usb interface */ 89 struct usbd_device *sc_udev; /* the usb device */ 90 struct usbd_pipe *sc_intr_pipe; /* interrupt pipe */ 91 uint8_t *sc_intr_buf; /* buffer for interrupt xfer */ 92 unsigned int sc_intr_buflen; /* size of buffer */ 93 struct usb_task sc_change_task; /* async status changes */ 94 volatile uint32_t sc_change_mask; /* mask of port changes */ 95 struct umcs7840_softc_oneport sc_ports[UMCS7840_MAX_PORTS]; 96 /* data for each port */ 97 uint8_t sc_numports; /* number of ports (subunits) */ 98 bool sc_init_done; /* special one time init in open */ 99 bool sc_dying; /* we have been deactivated */ 100 }; 101 102 static int umcs7840_get_reg(struct umcs7840_softc *, uint8_t, uint8_t *); 103 static int umcs7840_set_reg(struct umcs7840_softc *, uint8_t, uint8_t); 104 static int umcs7840_get_UART_reg(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t *); 105 static int umcs7840_set_UART_reg(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t ); 106 static int umcs7840_calc_baudrate(uint32_t, uint16_t *, uint8_t *); 107 static void umcs7840_dtr(struct umcs7840_softc *, int, bool); 108 static void umcs7840_rts(struct umcs7840_softc *, int, bool); 109 static void umcs7840_break(struct umcs7840_softc *, int, bool ); 110 111 static int umcs7840_match(device_t, cfdata_t, void *); 112 static void umcs7840_attach(device_t, device_t, void *); 113 static int umcs7840_detach(device_t, int); 114 static void umcs7840_intr(struct usbd_xfer *, void *, usbd_status); 115 static void umcs7840_change_task(void *arg); 116 static int umcs7840_activate(device_t, enum devact); 117 static void umcs7840_childdet(device_t, device_t); 118 119 static void umcs7840_get_status(void *, int, u_char *, u_char *); 120 static void umcs7840_set(void *, int, int, int); 121 static int umcs7840_param(void *, int, struct termios *); 122 static int umcs7840_port_open(void *, int); 123 static void umcs7840_port_close(void *, int); 124 125 struct ucom_methods umcs7840_methods = { 126 .ucom_get_status = umcs7840_get_status, 127 .ucom_set = umcs7840_set, 128 .ucom_param = umcs7840_param, 129 .ucom_open = umcs7840_port_open, 130 .ucom_close = umcs7840_port_close, 131 }; 132 133 static const struct usb_devno umcs7840_devs[] = { 134 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703 }, 135 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7810 }, 136 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7820 }, 137 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7840 }, 138 { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC2324 } 139 }; 140 #define umcs7840_lookup(v, p) usb_lookup(umcs7840_devs, v, p) 141 142 CFATTACH_DECL2_NEW(umcs, sizeof(struct umcs7840_softc), umcs7840_match, 143 umcs7840_attach, umcs7840_detach, umcs7840_activate, NULL, 144 umcs7840_childdet); 145 146 static inline int 147 umcs7840_reg_sp(int phyport) 148 { 149 KASSERT(phyport >= 0 && phyport < 4); 150 switch (phyport) { 151 default: 152 case 0: return MCS7840_DEV_REG_SP1; 153 case 1: return MCS7840_DEV_REG_SP2; 154 case 2: return MCS7840_DEV_REG_SP3; 155 case 3: return MCS7840_DEV_REG_SP4; 156 } 157 } 158 159 static inline int 160 umcs7840_reg_ctrl(int phyport) 161 { 162 KASSERT(phyport >= 0 && phyport < 4); 163 switch (phyport) { 164 default: 165 case 0: return MCS7840_DEV_REG_CONTROL1; 166 case 1: return MCS7840_DEV_REG_CONTROL2; 167 case 2: return MCS7840_DEV_REG_CONTROL3; 168 case 3: return MCS7840_DEV_REG_CONTROL4; 169 } 170 } 171 172 static int 173 umcs7840_match(device_t dev, cfdata_t match, void *aux) 174 { 175 struct usb_attach_arg *uaa = aux; 176 177 return umcs7840_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? 178 UMATCH_VENDOR_PRODUCT : UMATCH_NONE; 179 } 180 181 static void 182 umcs7840_attach(device_t parent, device_t self, void *aux) 183 { 184 struct umcs7840_softc *sc = device_private(self); 185 struct usb_attach_arg *uaa = aux; 186 struct usbd_device *dev = uaa->uaa_device; 187 usb_interface_descriptor_t *id; 188 usb_endpoint_descriptor_t *ed; 189 char *devinfop; 190 struct ucom_attach_args ucaa; 191 int error, i, intr_addr; 192 uint8_t data; 193 194 sc->sc_dev = self; 195 sc->sc_udev = uaa->uaa_device; 196 197 if (usbd_set_config_index(sc->sc_udev, MCS7840_CONFIG_INDEX, 1) != 0) { 198 aprint_error(": could not set configuration no\n"); 199 return; 200 } 201 202 /* get the first interface handle */ 203 error = usbd_device2interface_handle(sc->sc_udev, MCS7840_IFACE_INDEX, 204 &sc->sc_iface); 205 if (error != 0) { 206 aprint_error(": could not get interface handle\n"); 207 return; 208 } 209 210 /* 211 * Get number of ports 212 * Documentation (full datasheet) says, that number of ports is 213 * set as MCS7840_DEV_MODE_SELECT24S bit in MODE R/Only 214 * register. But vendor driver uses these undocumented 215 * register & bit. 216 * 217 * Experiments show, that MODE register can have `0' 218 * (4 ports) bit on 2-port device, so use vendor driver's way. 219 * 220 * Also, see notes in header file for these constants. 221 */ 222 umcs7840_get_reg(sc, MCS7840_DEV_REG_GPIO, &data); 223 if (data & MCS7840_DEV_GPIO_4PORTS) { 224 sc->sc_numports = 4; 225 /* physical port no are : 0, 1, 2, 3 */ 226 } else { 227 if (uaa->uaa_product == USB_PRODUCT_MOSCHIP_MCS7810) 228 sc->sc_numports = 1; 229 else { 230 sc->sc_numports = 2; 231 /* physical port no are : 0 and 2 */ 232 } 233 } 234 devinfop = usbd_devinfo_alloc(dev, 0); 235 aprint_normal(": %s\n", devinfop); 236 usbd_devinfo_free(devinfop); 237 aprint_verbose_dev(self, "found %d active ports\n", sc->sc_numports); 238 239 if (!umcs7840_get_reg(sc, MCS7840_DEV_REG_MODE, &data)) { 240 aprint_verbose_dev(self, "On-die confguration: RST: active %s, " 241 "HRD: %s, PLL: %s, POR: %s, Ports: %s, EEPROM write %s, " 242 "IrDA is %savailable\n", 243 (data & MCS7840_DEV_MODE_RESET) ? "low" : "high", 244 (data & MCS7840_DEV_MODE_SER_PRSNT) ? "yes" : "no", 245 (data & MCS7840_DEV_MODE_PLLBYPASS) ? "bypassed" : "avail", 246 (data & MCS7840_DEV_MODE_PORBYPASS) ? "bypassed" : "avail", 247 (data & MCS7840_DEV_MODE_SELECT24S) ? "2" : "4", 248 (data & MCS7840_DEV_MODE_EEPROMWR) ? "enabled" : "disabled", 249 (data & MCS7840_DEV_MODE_IRDA) ? "" : "not "); 250 } 251 252 /* 253 * Set up the interrupt pipe 254 */ 255 id = usbd_get_interface_descriptor(sc->sc_iface); 256 intr_addr = -1; 257 for (i = 0 ; i < id->bNumEndpoints ; i++) { 258 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 259 if (ed == NULL) continue; 260 if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN 261 || UE_GET_XFERTYPE(ed->bmAttributes) != UE_INTERRUPT) 262 continue; 263 sc->sc_intr_buflen = UGETW(ed->wMaxPacketSize); 264 intr_addr = ed->bEndpointAddress; 265 break; 266 } 267 if (intr_addr < 0) { 268 aprint_error_dev(self, "interrupt pipe not found\n"); 269 return; 270 } 271 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_buflen, KM_SLEEP); 272 273 error = usbd_open_pipe_intr(sc->sc_iface, intr_addr, 274 USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf, 275 sc->sc_intr_buflen, umcs7840_intr, 100); 276 if (error) { 277 aprint_error_dev(self, "cannot open interrupt pipe " 278 "(addr %d)\n", intr_addr); 279 return; 280 } 281 282 usb_init_task(&sc->sc_change_task, umcs7840_change_task, sc, 283 USB_TASKQ_MPSAFE); 284 285 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 286 287 memset(&ucaa, 0, sizeof(ucaa)); 288 ucaa.ucaa_ibufsize = 256; 289 ucaa.ucaa_obufsize = 256; 290 ucaa.ucaa_ibufsizepad = 256; 291 ucaa.ucaa_opkthdrlen = 0; 292 ucaa.ucaa_device = sc->sc_udev; 293 ucaa.ucaa_iface = sc->sc_iface; 294 ucaa.ucaa_methods = &umcs7840_methods; 295 ucaa.ucaa_arg = sc; 296 297 for (i = 0; i < sc->sc_numports; i++) { 298 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1; 299 300 /* 301 * On four port cards, endpoints are 0/1 for first, 302 * 2/3 for second, ... 303 * On two port cards, they are 0/1 for first, 4/5 for second. 304 * On single port, just 0/1 will be used. 305 */ 306 int phyport = i * (sc->sc_numports == 2 ? 2 : 1); 307 308 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 309 phyport*2); 310 if (ed == NULL) { 311 aprint_error_dev(self, 312 "no bulk in endpoint found for %d\n", i); 313 return; 314 } 315 ucaa.ucaa_bulkin = ed->bEndpointAddress; 316 317 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 318 phyport*2 + 1); 319 if (ed == NULL) { 320 aprint_error_dev(self, 321 "no bulk out endpoint found for %d\n", i); 322 return; 323 } 324 ucaa.ucaa_bulkout = ed->bEndpointAddress; 325 ucaa.ucaa_portno = i; 326 DPRINTF(("port %d physical port %d bulk-in %d bulk-out %d\n", 327 i, phyport, ucaa.ucaa_bulkin, ucaa.ucaa_bulkout)); 328 329 sc->sc_ports[i].sc_port_phys = phyport; 330 sc->sc_ports[i].sc_port_ucom = 331 config_found_sm_loc(self, "ucombus", NULL, &ucaa, 332 ucomprint, ucomsubmatch); 333 } 334 } 335 336 static int 337 umcs7840_get_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data) 338 { 339 usb_device_request_t req; 340 int err; 341 342 req.bmRequestType = UT_READ_VENDOR_DEVICE; 343 req.bRequest = MCS7840_RDREQ; 344 USETW(req.wValue, 0); 345 USETW(req.wIndex, reg); 346 USETW(req.wLength, UMCS7840_READ_LENGTH); 347 348 err = usbd_do_request(sc->sc_udev, &req, data); 349 if (err) 350 aprint_normal_dev(sc->sc_dev, 351 "Reading register %d failed: %s\n", reg, usbd_errstr(err)); 352 return err; 353 } 354 355 static int 356 umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data) 357 { 358 usb_device_request_t req; 359 int err; 360 361 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 362 req.bRequest = MCS7840_WRREQ; 363 USETW(req.wValue, data); 364 USETW(req.wIndex, reg); 365 USETW(req.wLength, 0); 366 367 err = usbd_do_request(sc->sc_udev, &req, 0); 368 if (err) 369 aprint_normal_dev(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err)); 370 371 return err; 372 } 373 374 static int 375 umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, 376 uint8_t reg, uint8_t *data) 377 { 378 usb_device_request_t req; 379 uint16_t wVal; 380 int err; 381 382 /* portno is port number */ 383 wVal = ((uint16_t)(portno + 1)) << 8; 384 385 req.bmRequestType = UT_READ_VENDOR_DEVICE; 386 req.bRequest = MCS7840_RDREQ; 387 USETW(req.wValue, wVal); 388 USETW(req.wIndex, reg); 389 USETW(req.wLength, UMCS7840_READ_LENGTH); 390 391 err = usbd_do_request(sc->sc_udev, &req, data); 392 if (err) 393 aprint_normal_dev(sc->sc_dev, "Reading UART %d register %d failed: %s\n", portno, reg, usbd_errstr(err)); 394 return err; 395 } 396 397 static int 398 umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data) 399 { 400 usb_device_request_t req; 401 int err; 402 uint16_t wVal; 403 404 /* portno is the physical port number */ 405 wVal = ((uint16_t)(portno + 1)) << 8 | data; 406 407 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 408 req.bRequest = MCS7840_WRREQ; 409 USETW(req.wValue, wVal); 410 USETW(req.wIndex, reg); 411 USETW(req.wLength, 0); 412 413 err = usbd_do_request(sc->sc_udev, &req, NULL); 414 if (err) 415 aprint_error_dev(sc->sc_dev, 416 "Writing UART %d register %d failed: %s\n", 417 portno, reg, usbd_errstr(err)); 418 return err; 419 } 420 421 static int 422 umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, 423 uint32_t rate) 424 { 425 int err; 426 uint16_t divisor; 427 uint8_t clk; 428 uint8_t data; 429 uint8_t physport = sc->sc_ports[portno].sc_port_phys; 430 int spreg = umcs7840_reg_sp(physport); 431 432 if (umcs7840_calc_baudrate(rate, &divisor, &clk)) { 433 DPRINTF(("Port %d bad speed: %d\n", portno, rate)); 434 return -1; 435 } 436 if (divisor == 0 || (clk & MCS7840_DEV_SPx_CLOCK_MASK) != clk) { 437 DPRINTF(("Port %d bad speed calculation: %d\n", portno, 438 rate)); 439 return -1; 440 } 441 DPRINTF(("Port %d set speed: %d (%02x / %d)\n", portno, rate, clk, divisor)); 442 443 /* Set clock source for standard BAUD frequences */ 444 err = umcs7840_get_reg(sc, spreg, &data); 445 if (err) 446 return err; 447 data &= MCS7840_DEV_SPx_CLOCK_MASK; 448 data |= clk; 449 err = umcs7840_set_reg(sc, spreg, data); 450 if (err) 451 return err; 452 453 /* Set divider */ 454 sc->sc_ports[portno].sc_port_lcr |= MCS7840_UART_LCR_DIVISORS; 455 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 456 if (err) 457 return err; 458 459 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff)); 460 if (err) 461 return err; 462 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLM, (uint8_t)((divisor >> 8) & 0xff)); 463 if (err) 464 return err; 465 466 /* Turn off access to DLL/DLM registers of UART */ 467 sc->sc_ports[portno].sc_port_lcr &= ~MCS7840_UART_LCR_DIVISORS; 468 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 469 if (err) 470 return err; 471 return 0; 472 } 473 474 static int 475 umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk) 476 { 477 /* Maximum speeds for standard frequences, when PLL is not used */ 478 static const uint32_t umcs7840_baudrate_divisors[] = 479 {0, 115200, 230400, 403200, 460800, 806400, 921600, 480 1572864, 3145728,}; 481 static const uint8_t umcs7840_baudrate_divisors_len = 482 __arraycount(umcs7840_baudrate_divisors); 483 uint8_t i = 0; 484 485 if (rate > umcs7840_baudrate_divisors[umcs7840_baudrate_divisors_len - 1]) 486 return -1; 487 488 for (i = 0; i < umcs7840_baudrate_divisors_len - 1 489 && !(rate > umcs7840_baudrate_divisors[i] 490 && rate <= umcs7840_baudrate_divisors[i + 1]); ++i); 491 *divisor = umcs7840_baudrate_divisors[i + 1] / rate; 492 /* 0x00 .. 0x70 */ 493 *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; 494 return 0; 495 } 496 497 static int 498 umcs7840_detach(device_t self, int flags) 499 { 500 struct umcs7840_softc *sc = device_private(self); 501 int rv = 0, i; 502 503 sc->sc_dying = true; 504 505 /* close interrupt pipe */ 506 if (sc->sc_intr_pipe != NULL) { 507 rv = usbd_abort_pipe(sc->sc_intr_pipe); 508 if (rv) 509 aprint_error_dev(sc->sc_dev, 510 "abort interrupt pipe failed: %s\n", 511 usbd_errstr(rv)); 512 rv = usbd_close_pipe(sc->sc_intr_pipe); 513 if (rv) 514 aprint_error_dev(sc->sc_dev, 515 "failed to close interrupt pipe: %s\n", 516 usbd_errstr(rv)); 517 kmem_free(sc->sc_intr_buf, sc->sc_intr_buflen); 518 sc->sc_intr_pipe = NULL; 519 } 520 usb_rem_task(sc->sc_udev, &sc->sc_change_task); 521 522 /* detach children */ 523 for (i = 0; i < sc->sc_numports; i++) { 524 if (sc->sc_ports[i].sc_port_ucom) { 525 rv = config_detach(sc->sc_ports[i].sc_port_ucom, 526 flags); 527 if (rv) 528 break; 529 } 530 } 531 532 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 533 534 return rv; 535 } 536 537 int 538 umcs7840_activate(device_t self, enum devact act) 539 { 540 struct umcs7840_softc *sc = device_private(self); 541 542 switch (act) { 543 case DVACT_DEACTIVATE: 544 sc->sc_dying = true; 545 return 0; 546 default: 547 return EOPNOTSUPP; 548 } 549 } 550 551 static void 552 umcs7840_childdet(device_t self, device_t child) 553 { 554 struct umcs7840_softc *sc = device_private(self); 555 int i; 556 557 for (i = 0; i < sc->sc_numports; i++) { 558 if (child == sc->sc_ports[i].sc_port_ucom) { 559 sc->sc_ports[i].sc_port_ucom = NULL; 560 return; 561 } 562 } 563 } 564 565 static void 566 umcs7840_get_status(void *self, int portno, u_char *lsr, u_char *msr) 567 { 568 struct umcs7840_softc *sc = self; 569 uint8_t pn = sc->sc_ports[portno].sc_port_phys; 570 uint8_t hw_lsr = 0; /* local line status register */ 571 uint8_t hw_msr = 0; /* local modem status register */ 572 573 if (sc->sc_dying) 574 return; 575 576 /* Read LSR & MSR */ 577 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LSR, &hw_lsr); 578 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); 579 580 *lsr = hw_lsr; 581 *msr = hw_msr; 582 } 583 584 static void 585 umcs7840_set(void *self, int portno, int reg, int onoff) 586 { 587 struct umcs7840_softc *sc = self; 588 589 if (sc->sc_dying) 590 return; 591 592 switch (reg) { 593 case UCOM_SET_DTR: 594 umcs7840_dtr(sc, portno, onoff); 595 break; 596 case UCOM_SET_RTS: 597 umcs7840_rts(sc, portno, onoff); 598 break; 599 case UCOM_SET_BREAK: 600 umcs7840_break(sc, portno, onoff); 601 break; 602 default: 603 break; 604 } 605 } 606 607 static int 608 umcs7840_param(void *self, int portno, struct termios *t) 609 { 610 struct umcs7840_softc *sc = self; 611 int pn = sc->sc_ports[portno].sc_port_phys; 612 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 613 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 614 615 if (t->c_cflag & CSTOPB) { 616 lcr |= MCS7840_UART_LCR_STOPB2; 617 } else { 618 lcr |= MCS7840_UART_LCR_STOPB1; 619 } 620 621 lcr &= ~MCS7840_UART_LCR_PARITYMASK; 622 if (t->c_cflag & PARENB) { 623 lcr |= MCS7840_UART_LCR_PARITYON; 624 if (t->c_cflag & PARODD) { 625 lcr = MCS7840_UART_LCR_PARITYODD; 626 } else { 627 lcr = MCS7840_UART_LCR_PARITYEVEN; 628 } 629 } else { 630 lcr &= ~MCS7840_UART_LCR_PARITYON; 631 } 632 633 lcr &= ~MCS7840_UART_LCR_DATALENMASK; 634 switch (t->c_cflag & CSIZE) { 635 case CS5: 636 lcr |= MCS7840_UART_LCR_DATALEN5; 637 break; 638 case CS6: 639 lcr |= MCS7840_UART_LCR_DATALEN6; 640 break; 641 case CS7: 642 lcr |= MCS7840_UART_LCR_DATALEN7; 643 break; 644 case CS8: 645 lcr |= MCS7840_UART_LCR_DATALEN8; 646 break; 647 } 648 649 if (t->c_cflag & CRTSCTS) 650 mcr |= MCS7840_UART_MCR_CTSRTS; 651 else 652 mcr &= ~MCS7840_UART_MCR_CTSRTS; 653 654 if (t->c_cflag & CLOCAL) 655 mcr &= ~MCS7840_UART_MCR_DTRDSR; 656 else 657 mcr |= MCS7840_UART_MCR_DTRDSR; 658 659 sc->sc_ports[portno].sc_port_lcr = lcr; 660 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 661 sc->sc_ports[pn].sc_port_lcr); 662 663 sc->sc_ports[portno].sc_port_mcr = mcr; 664 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 665 sc->sc_ports[pn].sc_port_mcr); 666 667 if (umcs7840_set_baudrate(sc, portno, t->c_ospeed)) 668 return EIO; 669 670 return 0; 671 } 672 673 static void 674 umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff) 675 { 676 int pn = sc->sc_ports[portno].sc_port_phys; 677 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 678 679 if (onoff) 680 mcr |= MCS7840_UART_MCR_DTR; 681 else 682 mcr &= ~MCS7840_UART_MCR_DTR; 683 684 sc->sc_ports[portno].sc_port_mcr = mcr; 685 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 686 sc->sc_ports[pn].sc_port_mcr); 687 } 688 689 static void 690 umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff) 691 { 692 int pn = sc->sc_ports[portno].sc_port_phys; 693 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 694 695 if (onoff) 696 mcr |= MCS7840_UART_MCR_RTS; 697 else 698 mcr &= ~MCS7840_UART_MCR_RTS; 699 700 sc->sc_ports[portno].sc_port_mcr = mcr; 701 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 702 sc->sc_ports[pn].sc_port_mcr); 703 } 704 705 static void 706 umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff) 707 { 708 int pn = sc->sc_ports[portno].sc_port_phys; 709 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 710 711 if (onoff) 712 lcr |= MCS7840_UART_LCR_BREAK; 713 else 714 lcr &= ~MCS7840_UART_LCR_BREAK; 715 716 sc->sc_ports[portno].sc_port_lcr = lcr; 717 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 718 sc->sc_ports[pn].sc_port_lcr); 719 } 720 721 static int 722 umcs7840_port_open(void *self, int portno) 723 { 724 struct umcs7840_softc *sc = self; 725 int pn = sc->sc_ports[portno].sc_port_phys; 726 int spreg = umcs7840_reg_sp(pn); 727 int ctrlreg = umcs7840_reg_ctrl(pn); 728 uint8_t data; 729 730 if (sc->sc_dying) 731 return EIO; 732 733 /* If it very first open, finish global configuration */ 734 if (!sc->sc_init_done) { 735 if (umcs7840_get_reg(sc, MCS7840_DEV_REG_CONTROL1, &data)) 736 return EIO; 737 data |= MCS7840_DEV_CONTROL1_DRIVER_DONE; 738 if (umcs7840_set_reg(sc, MCS7840_DEV_REG_CONTROL1, data)) 739 return EIO; 740 sc->sc_init_done = 1; 741 } 742 743 /* Toggle reset bit on-off */ 744 if (umcs7840_get_reg(sc, spreg, &data)) 745 return EIO; 746 data |= MCS7840_DEV_SPx_UART_RESET; 747 if (umcs7840_set_reg(sc, spreg, data)) 748 return EIO; 749 data &= ~MCS7840_DEV_SPx_UART_RESET; 750 if (umcs7840_set_reg(sc, spreg, data)) 751 return EIO; 752 753 /* Set RS-232 mode */ 754 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_SCRATCHPAD, 755 MCS7840_UART_SCRATCHPAD_RS232)) 756 return EIO; 757 758 /* Disable RX on time of initialization */ 759 if (umcs7840_get_reg(sc, ctrlreg, &data)) 760 return EIO; 761 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 762 if (umcs7840_set_reg(sc, ctrlreg, data)) 763 return EIO; 764 765 /* Disable all interrupts */ 766 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0)) 767 return EIO; 768 769 /* Reset FIFO -- documented */ 770 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 0)) 771 return EIO; 772 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 773 MCS7840_UART_FCR_ENABLE | MCS7840_UART_FCR_FLUSHRHR | 774 MCS7840_UART_FCR_FLUSHTHR | MCS7840_UART_FCR_RTL_1_14)) 775 return EIO; 776 777 /* Set 8 bit, no parity, 1 stop bit -- documented */ 778 sc->sc_ports[pn].sc_port_lcr = 779 MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1; 780 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 781 sc->sc_ports[pn].sc_port_lcr)) 782 return EIO; 783 784 /* 785 * Enable DTR/RTS on modem control, enable modem interrupts -- 786 * documented 787 */ 788 sc->sc_ports[pn].sc_port_mcr = MCS7840_UART_MCR_DTR 789 | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE; 790 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 791 sc->sc_ports[pn].sc_port_mcr)) 792 return EIO; 793 794 /* Clearing Bulkin and Bulkout FIFO */ 795 if (umcs7840_get_reg(sc, spreg, &data)) 796 return EIO; 797 data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO; 798 if (umcs7840_set_reg(sc, spreg, data)) 799 return EIO; 800 data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO 801 | MCS7840_DEV_SPx_RESET_IN_FIFO); 802 if (umcs7840_set_reg(sc, spreg, data)) 803 return EIO; 804 805 /* Set speed 9600 */ 806 if (umcs7840_set_baudrate(sc, portno, 9600)) 807 return EIO; 808 809 810 /* Finally enable all interrupts -- documented */ 811 /* 812 * Copied from vendor driver, I don't know why we should read LCR 813 * here 814 */ 815 if (umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 816 &sc->sc_ports[pn].sc_port_lcr)) 817 return EIO; 818 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 819 MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM)) 820 return EIO; 821 822 /* Enable RX */ 823 if (umcs7840_get_reg(sc, ctrlreg, &data)) 824 return EIO; 825 data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE; 826 if (umcs7840_set_reg(sc, ctrlreg, data)) 827 return EIO; 828 return 0; 829 } 830 831 static void 832 umcs7840_port_close(void *self, int portno) 833 { 834 struct umcs7840_softc *sc = self; 835 int pn = sc->sc_ports[portno].sc_port_phys; 836 int ctrlreg = umcs7840_reg_ctrl(pn); 837 uint8_t data; 838 839 if (sc->sc_dying) 840 return; 841 842 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 0); 843 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0); 844 845 /* Disable RX */ 846 if (umcs7840_get_reg(sc, ctrlreg, &data)) 847 return; 848 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 849 if (umcs7840_set_reg(sc, ctrlreg, data)) 850 return; 851 } 852 853 static void 854 umcs7840_intr(struct usbd_xfer *xfer, void *priv, 855 usbd_status status) 856 { 857 struct umcs7840_softc *sc = priv; 858 u_char *buf = sc->sc_intr_buf; 859 int actlen; 860 int subunit; 861 862 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED 863 || status == USBD_IOERROR) 864 return; 865 866 if (status != USBD_NORMAL_COMPLETION) { 867 aprint_error_dev(sc->sc_dev, 868 "umcs7840_intr: abnormal status: %s\n", 869 usbd_errstr(status)); 870 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 871 return; 872 } 873 874 usbd_get_xfer_status(xfer, NULL, NULL, &actlen, NULL); 875 if (actlen == 5 || actlen == 13) { 876 uint32_t change_mask = 0; 877 /* Check status of all ports */ 878 for (subunit = 0; subunit < sc->sc_numports; subunit++) { 879 uint8_t pn = sc->sc_ports[subunit].sc_port_phys; 880 if (buf[pn] & MCS7840_UART_ISR_NOPENDING) 881 continue; 882 DPRINTF(("Port %d has pending interrupt: %02x " 883 "(FIFO: %02x)\n", pn, 884 buf[pn] & MCS7840_UART_ISR_INTMASK, 885 buf[pn] & (~MCS7840_UART_ISR_INTMASK))); 886 switch (buf[pn] & MCS7840_UART_ISR_INTMASK) { 887 case MCS7840_UART_ISR_RXERR: 888 case MCS7840_UART_ISR_RXHASDATA: 889 case MCS7840_UART_ISR_RXTIMEOUT: 890 case MCS7840_UART_ISR_MSCHANGE: 891 change_mask |= (1U << subunit); 892 break; 893 default: 894 /* Do nothing */ 895 break; 896 } 897 } 898 899 if (change_mask != 0) { 900 atomic_or_32(&sc->sc_change_mask, change_mask); 901 usb_add_task(sc->sc_udev, &sc->sc_change_task, 902 USB_TASKQ_DRIVER); 903 } 904 } else { 905 aprint_error_dev(sc->sc_dev, 906 "Invalid interrupt data length %d", actlen); 907 } 908 } 909 910 static void 911 umcs7840_change_task(void *arg) 912 { 913 struct umcs7840_softc *sc = arg; 914 uint32_t change_mask; 915 int i; 916 917 change_mask = atomic_swap_32(&sc->sc_change_mask, 0); 918 for (i = 0; i < sc->sc_numports; i++) { 919 if (ISSET(change_mask, (1U << i))) 920 ucom_status_change(device_private( 921 sc->sc_ports[i].sc_port_ucom)); 922 } 923 } 924