umcs.c revision 1.4
1 /* $NetBSD: umcs.c,v 1.4 2014/03/17 21:21:57 martin 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 (at) 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 1.4 2014/03/17 21:21:57 martin 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 #include <sys/workqueue.h> 55 56 #include <dev/usb/usb.h> 57 #include <dev/usb/usbdi.h> 58 #include <dev/usb/usbdi_util.h> 59 #include <dev/usb/usbdevs.h> 60 61 #include <dev/usb/usbdevs.h> 62 #include <dev/usb/ucomvar.h> 63 64 #include "umcs.h" 65 66 #if 0 67 #define DPRINTF(ARG) printf ARG 68 #else 69 #define DPRINTF(ARG) 70 #endif 71 72 /* 73 * Two-port devices (both with 7820 chip and 7840 chip configured as two-port) 74 * have ports 0 and 2, with ports 1 and 3 omitted. 75 * So, PHYSICAL port numbers on two-port device will be 0 and 2. 76 * 77 * We use an array of the following struct, indexed by ucom port index, 78 * and include the physical port number in it. 79 */ 80 struct umcs7840_softc_oneport { 81 device_t sc_port_ucom; /* ucom subdevice */ 82 uint32_t sc_port_changed; /* call ucom_status_change() */ 83 unsigned int sc_port_phys; /* physical port number */ 84 uint8_t sc_port_lcr; /* local line control register */ 85 uint8_t sc_port_mcr; /* local modem control register */ 86 }; 87 88 struct umcs7840_softc { 89 device_t sc_dev; /* ourself */ 90 usbd_interface_handle sc_iface; /* the usb interface */ 91 usbd_device_handle sc_udev; /* the usb device */ 92 usbd_pipe_handle sc_intr_pipe; /* interrupt pipe */ 93 uint8_t *sc_intr_buf; /* buffer for interrupt xfer */ 94 unsigned int sc_intr_buflen; /* size of buffer */ 95 struct workqueue *sc_change_wq; /* workqueue for status changes */ 96 struct work sc_work; /* work for said workqueue. */ 97 struct umcs7840_softc_oneport sc_ports[UMCS7840_MAX_PORTS]; 98 /* data for each port */ 99 uint8_t sc_numports; /* number of ports (subunits) */ 100 bool sc_init_done; /* special one time init in open */ 101 bool sc_dying; /* we have been deactivated */ 102 }; 103 104 static int umcs7840_get_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data); 105 static int umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data); 106 static int umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t *data); 107 static int umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data); 108 static int umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk); 109 static void umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff); 110 static void umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff); 111 static void umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff); 112 113 static int umcs7840_match(device_t, cfdata_t, void *); 114 static void umcs7840_attach(device_t, device_t, void *); 115 static int umcs7840_detach(device_t, int); 116 static void umcs7840_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status); 117 static void umcs7840_change_worker(struct work *w, void *arg); 118 static int umcs7840_activate(device_t, enum devact); 119 static void umcs7840_childdet(device_t, device_t); 120 121 static void umcs7840_get_status(void *, int, u_char *, u_char *); 122 static void umcs7840_set(void *, int, int, int); 123 static int umcs7840_param(void *, int, struct termios *); 124 static int umcs7840_port_open(void *sc, int portno); 125 static void umcs7840_port_close(void *sc, int portno); 126 127 struct ucom_methods umcs7840_methods = { 128 .ucom_get_status = umcs7840_get_status, 129 .ucom_set = umcs7840_set, 130 .ucom_param = umcs7840_param, 131 .ucom_open = umcs7840_port_open, 132 .ucom_close = umcs7840_port_close, 133 }; 134 135 static const struct usb_devno umcs7840_devs[] = { 136 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703 }, 137 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7810 }, 138 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7820 }, 139 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7840 }, 140 { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC2324 } 141 }; 142 #define umcs7840_lookup(v, p) usb_lookup(umcs7840_devs, v, p) 143 144 CFATTACH_DECL2_NEW(umcs, sizeof(struct umcs7840_softc), umcs7840_match, 145 umcs7840_attach, umcs7840_detach, umcs7840_activate, NULL, 146 umcs7840_childdet); 147 148 static inline int 149 umcs7840_reg_sp(int phyport) 150 { 151 KASSERT(phyport >= 0 && phyport < 4); 152 switch (phyport) { 153 default: 154 case 0: return MCS7840_DEV_REG_SP1; 155 case 1: return MCS7840_DEV_REG_SP2; 156 case 2: return MCS7840_DEV_REG_SP3; 157 case 3: return MCS7840_DEV_REG_SP4; 158 } 159 } 160 161 static inline int 162 umcs7840_reg_ctrl(int phyport) 163 { 164 KASSERT(phyport >= 0 && phyport < 4); 165 switch (phyport) { 166 default: 167 case 0: return MCS7840_DEV_REG_CONTROL1; 168 case 1: return MCS7840_DEV_REG_CONTROL2; 169 case 2: return MCS7840_DEV_REG_CONTROL3; 170 case 3: return MCS7840_DEV_REG_CONTROL4; 171 } 172 } 173 174 static inline int 175 umcs7840_reg_dcr0(int phyport) 176 { 177 KASSERT(phyport >= 0 && phyport < 4); 178 switch (phyport) { 179 default: 180 case 0: return MCS7840_DEV_REG_DCR0_1; 181 case 1: return MCS7840_DEV_REG_DCR0_2; 182 case 2: return MCS7840_DEV_REG_DCR0_3; 183 case 3: return MCS7840_DEV_REG_DCR0_4; 184 } 185 } 186 187 static int 188 umcs7840_match(device_t dev, cfdata_t match, void *aux) 189 { 190 struct usb_attach_arg *uaa = aux; 191 192 return (umcs7840_lookup(uaa->vendor, uaa->product) != NULL ? 193 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 194 } 195 196 static void 197 umcs7840_attach(device_t parent, device_t self, void * aux) 198 { 199 struct umcs7840_softc *sc = device_private(self); 200 struct usb_attach_arg *uaa = aux; 201 usbd_device_handle dev = uaa->device; 202 usb_interface_descriptor_t *id; 203 usb_endpoint_descriptor_t *ed; 204 char *devinfop; 205 struct ucom_attach_args uca; 206 int error, i, intr_addr; 207 uint8_t data; 208 209 sc->sc_dev = self; 210 sc->sc_udev = uaa->device; 211 212 if (usbd_set_config_index(sc->sc_udev, MCS7840_CONFIG_INDEX, 1) != 0) { 213 aprint_error(": could not set configuration no\n"); 214 return; 215 } 216 217 /* get the first interface handle */ 218 error = usbd_device2interface_handle(sc->sc_udev, MCS7840_IFACE_INDEX, 219 &sc->sc_iface); 220 if (error != 0) { 221 aprint_error(": could not get interface handle\n"); 222 return; 223 } 224 225 /* 226 * Get number of ports 227 * Documentation (full datasheet) says, that number of ports is 228 * set as MCS7840_DEV_MODE_SELECT24S bit in MODE R/Only 229 * register. But vendor driver uses these undocumented 230 * register & bit. 231 * 232 * Experiments show, that MODE register can have `0' 233 * (4 ports) bit on 2-port device, so use vendor driver's way. 234 * 235 * Also, see notes in header file for these constants. 236 */ 237 umcs7840_get_reg(sc, MCS7840_DEV_REG_GPIO, &data); 238 if (data & MCS7840_DEV_GPIO_4PORTS) { 239 sc->sc_numports = 4; 240 /* physical port no are : 0, 1, 2, 3 */ 241 } else { 242 if (uaa->product == USB_PRODUCT_MOSCHIP_MCS7810) 243 sc->sc_numports = 1; 244 else { 245 sc->sc_numports = 2; 246 /* physical port no are : 0 and 2 */ 247 } 248 } 249 devinfop = usbd_devinfo_alloc(dev, 0); 250 aprint_normal(": %s\n", devinfop); 251 usbd_devinfo_free(devinfop); 252 aprint_verbose_dev(self, "found %d active ports\n", sc->sc_numports); 253 254 if (!umcs7840_get_reg(sc, MCS7840_DEV_REG_MODE, &data)) { 255 aprint_verbose_dev(self, "On-die confguration: RST: active %s, " 256 "HRD: %s, PLL: %s, POR: %s, Ports: %s, EEPROM write %s, " 257 "IrDA is %savailable\n", 258 (data & MCS7840_DEV_MODE_RESET) ? "low" : "high", 259 (data & MCS7840_DEV_MODE_SER_PRSNT) ? "yes" : "no", 260 (data & MCS7840_DEV_MODE_PLLBYPASS) ? "bypassed" : "avail", 261 (data & MCS7840_DEV_MODE_PORBYPASS) ? "bypassed" : "avail", 262 (data & MCS7840_DEV_MODE_SELECT24S) ? "2" : "4", 263 (data & MCS7840_DEV_MODE_EEPROMWR) ? "enabled" : "disabled", 264 (data & MCS7840_DEV_MODE_IRDA) ? "" : "not "); 265 } 266 267 /* 268 * Set up the interrupt pipe 269 */ 270 id = usbd_get_interface_descriptor(sc->sc_iface); 271 intr_addr = -1; 272 for (i = 0 ; i < id->bNumEndpoints ; i++) { 273 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 274 if (ed == NULL) continue; 275 if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN 276 || UE_GET_XFERTYPE(ed->bmAttributes) != UE_INTERRUPT) 277 continue; 278 sc->sc_intr_buflen = UGETW(ed->wMaxPacketSize); 279 intr_addr = ed->bEndpointAddress; 280 break; 281 } 282 if (intr_addr < 0) { 283 aprint_error_dev(self, "interrupt pipe not found\n"); 284 return; 285 } 286 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_buflen, KM_SLEEP); 287 288 error = usbd_open_pipe_intr(sc->sc_iface, intr_addr, 289 USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf, 290 sc->sc_intr_buflen, umcs7840_intr, 100); 291 if (error) { 292 aprint_error_dev(self, "cannot open interrupt pipe " 293 "(addr %d)\n", intr_addr); 294 return; 295 } 296 297 if (workqueue_create(&sc->sc_change_wq, "umcsq", 298 umcs7840_change_worker, sc, PRI_NONE, IPL_USB, WQ_MPSAFE)) { 299 aprint_error_dev(self, "workqueue creation failed\n"); 300 return; 301 } 302 303 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 304 sc->sc_dev); 305 306 memset(&uca, 0, sizeof uca); 307 uca.ibufsize = 256; 308 uca.obufsize = 256; 309 uca.ibufsizepad = 256; 310 uca.opkthdrlen = 0; 311 uca.device = sc->sc_udev; 312 uca.iface = sc->sc_iface; 313 uca.methods = &umcs7840_methods; 314 uca.arg = sc; 315 316 for (i = 0; i < sc->sc_numports; i++) { 317 uca.bulkin = uca.bulkout = -1; 318 319 /* 320 * On four port cards, endpoints are 0/1 for first, 321 * 2/3 for second, ... 322 * On two port cards, they are 0/1 for first, 4/5 for second. 323 * On single port, just 0/1 will be used. 324 */ 325 int phyport = i * (sc->sc_numports == 2 ? 2 : 1); 326 327 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 328 phyport*2); 329 if (ed == NULL) { 330 aprint_error_dev(self, 331 "no bulk in endpoint found for %d\n", i); 332 return; 333 } 334 uca.bulkin = ed->bEndpointAddress; 335 336 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 337 phyport*2 + 1); 338 if (ed == NULL) { 339 aprint_error_dev(self, 340 "no bulk out endpoint found for %d\n", i); 341 return; 342 } 343 uca.bulkout = ed->bEndpointAddress; 344 uca.portno = i; 345 DPRINTF(("port %d physical port %d bulk-in %d bulk-out %d\n", 346 i, phyport, uca.bulkin, uca.bulkout)); 347 348 sc->sc_ports[i].sc_port_phys = phyport; 349 sc->sc_ports[i].sc_port_ucom = 350 config_found_sm_loc(self, "ucombus", NULL, &uca, 351 ucomprint, ucomsubmatch); 352 } 353 } 354 355 static int 356 umcs7840_get_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_READ_VENDOR_DEVICE; 362 req.bRequest = MCS7840_RDREQ; 363 USETW(req.wValue, 0); 364 USETW(req.wIndex, reg); 365 USETW(req.wLength, UMCS7840_READ_LENGTH); 366 367 err = usbd_do_request(sc->sc_udev, &req, data); 368 if (err) 369 aprint_normal_dev(sc->sc_dev, 370 "Reading register %d failed: %s\n", reg, usbd_errstr(err)); 371 return err; 372 } 373 374 static int 375 umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data) 376 { 377 usb_device_request_t req; 378 int err; 379 380 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 381 req.bRequest = MCS7840_WRREQ; 382 USETW(req.wValue, data); 383 USETW(req.wIndex, reg); 384 USETW(req.wLength, 0); 385 386 err = usbd_do_request(sc->sc_udev, &req, 0); 387 if (err) 388 aprint_normal_dev(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err)); 389 390 return err; 391 } 392 393 static int 394 umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, 395 uint8_t reg, uint8_t *data) 396 { 397 usb_device_request_t req; 398 uint16_t wVal; 399 int err; 400 401 /* portno is port number */ 402 wVal = ((uint16_t)(portno + 1)) << 8; 403 404 req.bmRequestType = UT_READ_VENDOR_DEVICE; 405 req.bRequest = MCS7840_RDREQ; 406 USETW(req.wValue, wVal); 407 USETW(req.wIndex, reg); 408 USETW(req.wLength, UMCS7840_READ_LENGTH); 409 410 err = usbd_do_request(sc->sc_udev, &req, data); 411 if (err) 412 aprint_normal_dev(sc->sc_dev, "Reading UART %d register %d failed: %s\n", portno, reg, usbd_errstr(err)); 413 return err; 414 } 415 416 static int 417 umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data) 418 { 419 usb_device_request_t req; 420 int err; 421 uint16_t wVal; 422 423 /* portno is the physical port number */ 424 wVal = ((uint16_t)(portno + 1)) << 8 | data; 425 426 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 427 req.bRequest = MCS7840_WRREQ; 428 USETW(req.wValue, wVal); 429 USETW(req.wIndex, reg); 430 USETW(req.wLength, 0); 431 432 err = usbd_do_request(sc->sc_udev, &req, NULL); 433 if (err) 434 aprint_error_dev(sc->sc_dev, 435 "Writing UART %d register %d failed: %s\n", 436 portno, reg, usbd_errstr(err)); 437 return err; 438 } 439 440 static int 441 umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, uint32_t rate) 442 { 443 int err; 444 uint16_t divisor; 445 uint8_t clk; 446 uint8_t data; 447 uint8_t physport = sc->sc_ports[portno].sc_port_phys; 448 int spreg = umcs7840_reg_sp(physport); 449 450 if (umcs7840_calc_baudrate(rate, &divisor, &clk)) { 451 DPRINTF(("Port %d bad speed: %d\n", portno, rate)); 452 return (-1); 453 } 454 if (divisor == 0 || (clk & MCS7840_DEV_SPx_CLOCK_MASK) != clk) { 455 DPRINTF(("Port %d bad speed calculation: %d\n", portno, rate)); 456 return (-1); 457 } 458 DPRINTF(("Port %d set speed: %d (%02x / %d)\n", portno, rate, clk, divisor)); 459 460 /* Set clock source for standard BAUD frequences */ 461 err = umcs7840_get_reg(sc, spreg, &data); 462 if (err) 463 return err; 464 data &= MCS7840_DEV_SPx_CLOCK_MASK; 465 data |= clk; 466 err = umcs7840_set_reg(sc, spreg, data); 467 if (err) 468 return err; 469 470 /* Set divider */ 471 sc->sc_ports[portno].sc_port_lcr |= MCS7840_UART_LCR_DIVISORS; 472 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 473 if (err) 474 return err; 475 476 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff)); 477 if (err) 478 return err; 479 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLM, (uint8_t)((divisor >> 8) & 0xff)); 480 if (err) 481 return err; 482 483 /* Turn off access to DLL/DLM registers of UART */ 484 sc->sc_ports[portno].sc_port_lcr &= ~MCS7840_UART_LCR_DIVISORS; 485 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 486 if (err) 487 return err; 488 return (0); 489 } 490 491 static int 492 umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk) 493 { 494 /* Maximum speeds for standard frequences, when PLL is not used */ 495 static const uint32_t umcs7840_baudrate_divisors[] = 496 {0, 115200, 230400, 403200, 460800, 806400, 921600, 497 1572864, 3145728,}; 498 static const uint8_t umcs7840_baudrate_divisors_len = 499 __arraycount(umcs7840_baudrate_divisors); 500 uint8_t i = 0; 501 502 if (rate > umcs7840_baudrate_divisors[umcs7840_baudrate_divisors_len - 1]) 503 return (-1); 504 505 for (i = 0; i < umcs7840_baudrate_divisors_len - 1 506 && !(rate > umcs7840_baudrate_divisors[i] 507 && rate <= umcs7840_baudrate_divisors[i + 1]); ++i); 508 *divisor = umcs7840_baudrate_divisors[i + 1] / rate; 509 /* 0x00 .. 0x70 */ 510 *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; 511 return (0); 512 } 513 514 static int 515 umcs7840_detach(device_t self, int flags) 516 { 517 struct umcs7840_softc *sc = device_private(self); 518 int rv = 0, i; 519 520 sc->sc_dying = true; 521 522 /* close interrupt pipe */ 523 if (sc->sc_intr_pipe != NULL) { 524 rv = usbd_abort_pipe(sc->sc_intr_pipe); 525 if (rv) 526 aprint_error_dev(sc->sc_dev, 527 "abort interrupt pipe failed: %s\n", 528 usbd_errstr(rv)); 529 rv = usbd_close_pipe(sc->sc_intr_pipe); 530 if (rv) 531 aprint_error_dev(sc->sc_dev, 532 "failed to close interrupt pipe: %s\n", 533 usbd_errstr(rv)); 534 kmem_free(sc->sc_intr_buf, sc->sc_intr_buflen); 535 sc->sc_intr_pipe = NULL; 536 } 537 if (sc->sc_change_wq != NULL) 538 workqueue_destroy(sc->sc_change_wq); 539 540 /* detach children */ 541 for (i = 0; i < sc->sc_numports; i++) { 542 if (sc->sc_ports[i].sc_port_ucom) { 543 rv = config_detach(sc->sc_ports[i].sc_port_ucom, 544 flags); 545 if (rv) 546 break; 547 } 548 } 549 550 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 551 sc->sc_dev); 552 553 return rv; 554 } 555 556 int 557 umcs7840_activate(device_t self, enum devact act) 558 { 559 struct umcs7840_softc *sc = device_private(self); 560 561 switch (act) { 562 case DVACT_DEACTIVATE: 563 sc->sc_dying = true; 564 return 0; 565 default: 566 return EOPNOTSUPP; 567 } 568 } 569 570 static void 571 umcs7840_childdet(device_t self, device_t child) 572 { 573 struct umcs7840_softc *sc = device_private(self); 574 int i; 575 576 for (i = 0; i < sc->sc_numports; i++) { 577 if (child == sc->sc_ports[i].sc_port_ucom) { 578 sc->sc_ports[i].sc_port_ucom = NULL; 579 return; 580 } 581 } 582 } 583 584 static void 585 umcs7840_get_status(void *self, int portno, u_char *lsr, u_char *msr) 586 { 587 struct umcs7840_softc *sc = self; 588 uint8_t pn = sc->sc_ports[portno].sc_port_phys; 589 uint8_t hw_lsr = 0; /* local line status register */ 590 uint8_t hw_msr = 0; /* local modem status register */ 591 592 if (sc->sc_dying) 593 return; 594 595 /* Read LSR & MSR */ 596 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LSR, &hw_lsr); 597 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); 598 599 *lsr = hw_lsr; 600 *msr = hw_msr; 601 } 602 603 static void 604 umcs7840_set(void *self, int portno, int reg, int onoff) 605 { 606 struct umcs7840_softc *sc = self; 607 int pn = sc->sc_ports[portno].sc_port_phys; 608 609 if (sc->sc_dying) 610 return; 611 612 switch (reg) { 613 case UCOM_SET_DTR: 614 umcs7840_dtr(sc, pn, onoff); 615 break; 616 case UCOM_SET_RTS: 617 umcs7840_rts(sc, pn, onoff); 618 break; 619 case UCOM_SET_BREAK: 620 umcs7840_break(sc, pn, onoff); 621 break; 622 default: 623 break; 624 } 625 } 626 627 static int 628 umcs7840_param(void *self, int portno, struct termios *t) 629 { 630 struct umcs7840_softc *sc = self; 631 int pn = sc->sc_ports[portno].sc_port_phys; 632 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 633 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 634 635 if (t->c_cflag & CSTOPB) { 636 lcr |= MCS7840_UART_LCR_STOPB2; 637 } else { 638 lcr |= MCS7840_UART_LCR_STOPB1; 639 } 640 641 lcr &= ~MCS7840_UART_LCR_PARITYMASK; 642 if (t->c_cflag & PARENB) { 643 lcr |= MCS7840_UART_LCR_PARITYON; 644 if (t->c_cflag & PARODD) { 645 lcr = MCS7840_UART_LCR_PARITYODD; 646 } else { 647 lcr = MCS7840_UART_LCR_PARITYEVEN; 648 } 649 } else { 650 lcr &= ~MCS7840_UART_LCR_PARITYON; 651 } 652 653 lcr &= ~MCS7840_UART_LCR_DATALENMASK; 654 switch (t->c_cflag & CSIZE) { 655 case CS5: 656 lcr |= MCS7840_UART_LCR_DATALEN5; 657 break; 658 case CS6: 659 lcr |= MCS7840_UART_LCR_DATALEN6; 660 break; 661 case CS7: 662 lcr |= MCS7840_UART_LCR_DATALEN7; 663 break; 664 case CS8: 665 lcr |= MCS7840_UART_LCR_DATALEN8; 666 break; 667 } 668 669 if (t->c_cflag & CRTSCTS) 670 mcr |= MCS7840_UART_MCR_CTSRTS; 671 else 672 mcr &= ~MCS7840_UART_MCR_CTSRTS; 673 674 if (t->c_cflag & CLOCAL) 675 mcr &= ~MCS7840_UART_MCR_DTRDSR; 676 else 677 mcr |= MCS7840_UART_MCR_DTRDSR; 678 679 sc->sc_ports[portno].sc_port_lcr = lcr; 680 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 681 sc->sc_ports[pn].sc_port_lcr); 682 683 sc->sc_ports[portno].sc_port_mcr = mcr; 684 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 685 sc->sc_ports[pn].sc_port_mcr); 686 687 if (umcs7840_set_baudrate(sc, pn, t->c_ospeed)) 688 return EIO; 689 690 return 0; 691 } 692 693 static void 694 umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff) 695 { 696 int pn = sc->sc_ports[portno].sc_port_phys; 697 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 698 699 if (onoff) 700 mcr |= MCS7840_UART_MCR_DTR; 701 else 702 mcr &= ~MCS7840_UART_MCR_DTR; 703 704 sc->sc_ports[portno].sc_port_mcr = mcr; 705 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 706 sc->sc_ports[pn].sc_port_mcr); 707 } 708 709 static void 710 umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff) 711 { 712 int pn = sc->sc_ports[portno].sc_port_phys; 713 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 714 715 if (onoff) 716 mcr |= MCS7840_UART_MCR_RTS; 717 else 718 mcr &= ~MCS7840_UART_MCR_RTS; 719 720 sc->sc_ports[portno].sc_port_mcr = mcr; 721 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 722 sc->sc_ports[pn].sc_port_mcr); 723 } 724 725 static void 726 umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff) 727 { 728 int pn = sc->sc_ports[portno].sc_port_phys; 729 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 730 731 if (onoff) 732 lcr |= MCS7840_UART_LCR_BREAK; 733 else 734 lcr &= ~MCS7840_UART_LCR_BREAK; 735 736 sc->sc_ports[portno].sc_port_lcr = lcr; 737 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 738 sc->sc_ports[pn].sc_port_lcr); 739 } 740 741 static int 742 umcs7840_port_open(void *self, int portno) 743 { 744 struct umcs7840_softc *sc = self; 745 int pn = sc->sc_ports[portno].sc_port_phys; 746 int spreg = umcs7840_reg_sp(pn); 747 int ctrlreg = umcs7840_reg_ctrl(pn); 748 uint8_t data; 749 750 if (sc->sc_dying) 751 return EIO; 752 753 /* If it very first open, finish global configuration */ 754 if (!sc->sc_init_done) { 755 if (umcs7840_get_reg(sc, MCS7840_DEV_REG_CONTROL1, &data)) 756 return EIO; 757 data |= MCS7840_DEV_CONTROL1_DRIVER_DONE; 758 if (umcs7840_set_reg(sc, MCS7840_DEV_REG_CONTROL1, data)) 759 return EIO; 760 sc->sc_init_done = 1; 761 } 762 763 /* Toggle reset bit on-off */ 764 if (umcs7840_get_reg(sc, spreg, &data)) 765 return EIO; 766 data |= MCS7840_DEV_SPx_UART_RESET; 767 if (umcs7840_set_reg(sc, spreg, data)) 768 return EIO; 769 data &= ~MCS7840_DEV_SPx_UART_RESET; 770 if (umcs7840_set_reg(sc, spreg, data)) 771 return EIO; 772 773 /* Set RS-232 mode */ 774 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_SCRATCHPAD, 775 MCS7840_UART_SCRATCHPAD_RS232)) 776 return EIO; 777 778 /* Disable RX on time of initialization */ 779 if (umcs7840_get_reg(sc, ctrlreg, &data)) 780 return EIO; 781 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 782 if (umcs7840_set_reg(sc, ctrlreg, data)) 783 return EIO; 784 785 /* Disable all interrupts */ 786 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0)) 787 return EIO; 788 789 /* Reset FIFO -- documented */ 790 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 0)) 791 return EIO; 792 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 793 MCS7840_UART_FCR_ENABLE | MCS7840_UART_FCR_FLUSHRHR | 794 MCS7840_UART_FCR_FLUSHTHR | MCS7840_UART_FCR_RTL_1_14)) 795 return EIO; 796 797 /* Set 8 bit, no parity, 1 stop bit -- documented */ 798 sc->sc_ports[pn].sc_port_lcr = 799 MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1; 800 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 801 sc->sc_ports[pn].sc_port_lcr)) 802 return EIO; 803 804 /* 805 * Enable DTR/RTS on modem control, enable modem interrupts -- 806 * documented 807 */ 808 sc->sc_ports[pn].sc_port_mcr = MCS7840_UART_MCR_DTR 809 | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE; 810 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 811 sc->sc_ports[pn].sc_port_mcr)) 812 return EIO; 813 814 /* Clearing Bulkin and Bulkout FIFO */ 815 if (umcs7840_get_reg(sc, spreg, &data)) 816 return EIO; 817 data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO; 818 if (umcs7840_set_reg(sc, spreg, data)) 819 return EIO; 820 data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO 821 | MCS7840_DEV_SPx_RESET_IN_FIFO); 822 if (umcs7840_set_reg(sc, spreg, data)) 823 return EIO; 824 825 /* Set speed 9600 */ 826 if (umcs7840_set_baudrate(sc, pn, 9600)) 827 return EIO; 828 829 830 /* Finally enable all interrupts -- documented */ 831 /* 832 * Copied from vendor driver, I don't know why we should read LCR 833 * here 834 */ 835 if (umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 836 &sc->sc_ports[pn].sc_port_lcr)) 837 return EIO; 838 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 839 MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM)) 840 return EIO; 841 842 /* Enable RX */ 843 if (umcs7840_get_reg(sc, ctrlreg, &data)) 844 return EIO; 845 data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE; 846 if (umcs7840_set_reg(sc, ctrlreg, data)) 847 return EIO; 848 return 0; 849 } 850 851 static void 852 umcs7840_port_close(void *self, int portno) 853 { 854 struct umcs7840_softc *sc = self; 855 int pn = sc->sc_ports[portno].sc_port_phys; 856 int ctrlreg = umcs7840_reg_ctrl(pn); 857 uint8_t data; 858 859 atomic_swap_32(&sc->sc_ports[portno].sc_port_changed, 0); 860 861 if (sc->sc_dying) 862 return; 863 864 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 0); 865 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0); 866 867 /* Disable RX */ 868 if (umcs7840_get_reg(sc, ctrlreg, &data)) 869 return; 870 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 871 if (umcs7840_set_reg(sc, ctrlreg, data)) 872 return; 873 } 874 875 static void 876 umcs7840_intr(usbd_xfer_handle xfer, usbd_private_handle priv, 877 usbd_status status) 878 { 879 struct umcs7840_softc *sc = priv; 880 u_char *buf = sc->sc_intr_buf; 881 int actlen; 882 int subunit, found; 883 884 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED 885 || status == USBD_IOERROR) 886 return; 887 888 found = 0; 889 if (status != USBD_NORMAL_COMPLETION) { 890 aprint_error_dev(sc->sc_dev, 891 "umcs7840_intr: abnormal status: %s\n", 892 usbd_errstr(status)); 893 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 894 return; 895 } 896 897 usbd_get_xfer_status(xfer, NULL, NULL, &actlen, NULL); 898 if (actlen == 5 || actlen == 13) { 899 /* Check status of all ports */ 900 for (subunit = 0; subunit < sc->sc_numports; subunit++) { 901 uint8_t pn = sc->sc_ports[subunit].sc_port_phys; 902 if (buf[pn] & MCS7840_UART_ISR_NOPENDING) 903 continue; 904 DPRINTF(("Port %d has pending interrupt: %02x " 905 "(FIFO: %02x)\n", pn, 906 buf[pn] & MCS7840_UART_ISR_INTMASK, 907 buf[pn] & (~MCS7840_UART_ISR_INTMASK))); 908 switch (buf[pn] & MCS7840_UART_ISR_INTMASK) { 909 case MCS7840_UART_ISR_RXERR: 910 case MCS7840_UART_ISR_RXHASDATA: 911 case MCS7840_UART_ISR_RXTIMEOUT: 912 case MCS7840_UART_ISR_MSCHANGE: 913 atomic_swap_32( 914 &sc->sc_ports[subunit].sc_port_changed, 915 1); 916 found++; 917 break; 918 default: 919 /* Do nothing */ 920 break; 921 } 922 } 923 if (found) 924 workqueue_enqueue(sc->sc_change_wq, &sc->sc_work, 925 NULL); 926 } else { 927 aprint_error_dev(sc->sc_dev, 928 "Invalid interrupt data length %d", actlen); 929 } 930 } 931 932 static void 933 umcs7840_change_worker(struct work *w, void *arg) 934 { 935 struct umcs7840_softc *sc = arg; 936 int i; 937 938 for (i = 0; i < sc->sc_numports; i++) { 939 if (sc->sc_ports[i].sc_port_changed) { 940 ucom_status_change(device_private( 941 sc->sc_ports[i].sc_port_ucom)); 942 atomic_swap_32(&sc->sc_ports[i].sc_port_changed, 0); 943 } 944 } 945 } 946
Indexes created Tue Sep 30 20:09:53 GMT 2025