1 /* $NetBSD: umcs.c,v 1.22 2024/02/09 22:08:37 andvar 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 normal 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 1.22 2024/02/09 22:08:37 andvar 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 enum { 89 UMCS_INIT_NONE, 90 UMCS_INIT_INITED 91 } sc_init_state; 92 struct usbd_interface *sc_iface; /* the usb interface */ 93 struct usbd_device *sc_udev; /* the usb device */ 94 struct usbd_pipe *sc_intr_pipe; /* interrupt pipe */ 95 uint8_t *sc_intr_buf; /* buffer for interrupt xfer */ 96 unsigned int sc_intr_buflen; /* size of buffer */ 97 struct usb_task sc_change_task; /* async status changes */ 98 volatile uint32_t sc_change_mask; /* mask of port changes */ 99 struct umcs7840_softc_oneport sc_ports[UMCS7840_MAX_PORTS]; 100 /* data for each port */ 101 uint8_t sc_numports; /* number of ports (subunits) */ 102 bool sc_init_done; /* special one time init in open */ 103 bool sc_dying; /* we have been deactivated */ 104 }; 105 106 static int umcs7840_get_reg(struct umcs7840_softc *, uint8_t, uint8_t *); 107 static int umcs7840_set_reg(struct umcs7840_softc *, uint8_t, uint8_t); 108 static int umcs7840_get_UART_reg(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t *); 109 static int umcs7840_set_UART_reg(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t ); 110 static int umcs7840_calc_baudrate(uint32_t, uint16_t *, uint8_t *); 111 static void umcs7840_dtr(struct umcs7840_softc *, int, bool); 112 static void umcs7840_rts(struct umcs7840_softc *, int, bool); 113 static void umcs7840_break(struct umcs7840_softc *, int, bool ); 114 115 static int umcs7840_match(device_t, cfdata_t, void *); 116 static void umcs7840_attach(device_t, device_t, void *); 117 static int umcs7840_detach(device_t, int); 118 static void umcs7840_intr(struct usbd_xfer *, void *, usbd_status); 119 static void umcs7840_change_task(void *arg); 120 static void umcs7840_childdet(device_t, device_t); 121 122 static void umcs7840_get_status(void *, int, u_char *, u_char *); 123 static void umcs7840_set(void *, int, int, int); 124 static int umcs7840_param(void *, int, struct termios *); 125 static int umcs7840_port_open(void *, int); 126 static void umcs7840_port_close(void *, int); 127 128 static const struct ucom_methods umcs7840_methods = { 129 .ucom_get_status = umcs7840_get_status, 130 .ucom_set = umcs7840_set, 131 .ucom_param = umcs7840_param, 132 .ucom_open = umcs7840_port_open, 133 .ucom_close = umcs7840_port_close, 134 }; 135 136 static const struct usb_devno umcs7840_devs[] = { 137 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703 }, 138 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7810 }, 139 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7820 }, 140 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7840 }, 141 { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC2324 } 142 }; 143 #define umcs7840_lookup(v, p) usb_lookup(umcs7840_devs, v, p) 144 145 CFATTACH_DECL2_NEW(umcs, sizeof(struct umcs7840_softc), umcs7840_match, 146 umcs7840_attach, umcs7840_detach, NULL, NULL, 147 umcs7840_childdet); 148 149 static inline int 150 umcs7840_reg_sp(int phyport) 151 { 152 KASSERT(phyport >= 0 && phyport < 4); 153 switch (phyport) { 154 default: 155 case 0: return MCS7840_DEV_REG_SP1; 156 case 1: return MCS7840_DEV_REG_SP2; 157 case 2: return MCS7840_DEV_REG_SP3; 158 case 3: return MCS7840_DEV_REG_SP4; 159 } 160 } 161 162 static inline int 163 umcs7840_reg_ctrl(int phyport) 164 { 165 KASSERT(phyport >= 0 && phyport < 4); 166 switch (phyport) { 167 default: 168 case 0: return MCS7840_DEV_REG_CONTROL1; 169 case 1: return MCS7840_DEV_REG_CONTROL2; 170 case 2: return MCS7840_DEV_REG_CONTROL3; 171 case 3: return MCS7840_DEV_REG_CONTROL4; 172 } 173 } 174 175 static int 176 umcs7840_match(device_t dev, cfdata_t match, void *aux) 177 { 178 struct usb_attach_arg *uaa = aux; 179 180 return umcs7840_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? 181 UMATCH_VENDOR_PRODUCT : UMATCH_NONE; 182 } 183 184 static void 185 umcs7840_attach(device_t parent, device_t self, void *aux) 186 { 187 struct umcs7840_softc *sc = device_private(self); 188 struct usb_attach_arg *uaa = aux; 189 struct usbd_device *dev = uaa->uaa_device; 190 usb_interface_descriptor_t *id; 191 usb_endpoint_descriptor_t *ed; 192 char *devinfop; 193 struct ucom_attach_args ucaa; 194 int error, i, intr_addr; 195 uint8_t data; 196 197 sc->sc_dev = self; 198 sc->sc_udev = uaa->uaa_device; 199 sc->sc_dying = false; 200 sc->sc_init_state = UMCS_INIT_NONE; 201 202 if (usbd_set_config_index(sc->sc_udev, MCS7840_CONFIG_INDEX, 1) != 0) { 203 aprint_error(": could not set configuration no\n"); 204 sc->sc_dying = true; 205 return; 206 } 207 208 /* get the first interface handle */ 209 error = usbd_device2interface_handle(sc->sc_udev, MCS7840_IFACE_INDEX, 210 &sc->sc_iface); 211 if (error != 0) { 212 aprint_error(": could not get interface handle\n"); 213 sc->sc_dying = true; 214 return; 215 } 216 217 /* 218 * Get number of ports 219 * Documentation (full datasheet) says, that number of ports is 220 * set as MCS7840_DEV_MODE_SELECT24S bit in MODE R/Only 221 * register. But vendor driver uses these undocumented 222 * register & bit. 223 * 224 * Experiments show, that MODE register can have `0' 225 * (4 ports) bit on 2-port device, so use vendor driver's way. 226 * 227 * Also, see notes in header file for these constants. 228 */ 229 error = umcs7840_get_reg(sc, MCS7840_DEV_REG_GPIO, &data); 230 if (error == 0 && (data & MCS7840_DEV_GPIO_4PORTS) != 0) { 231 sc->sc_numports = 4; 232 /* physical port no are : 0, 1, 2, 3 */ 233 } else { 234 if (uaa->uaa_product == USB_PRODUCT_MOSCHIP_MCS7810) 235 sc->sc_numports = 1; 236 else { 237 sc->sc_numports = 2; 238 /* physical port no are : 0 and 2 */ 239 } 240 } 241 devinfop = usbd_devinfo_alloc(dev, 0); 242 aprint_normal(": %s\n", devinfop); 243 usbd_devinfo_free(devinfop); 244 aprint_verbose_dev(self, "found %d active ports\n", sc->sc_numports); 245 246 if (!umcs7840_get_reg(sc, MCS7840_DEV_REG_MODE, &data)) { 247 aprint_verbose_dev(self, "On-die configuration: RST: active %s, " 248 "HRD: %s, PLL: %s, POR: %s, Ports: %s, EEPROM write %s, " 249 "IrDA is %savailable\n", 250 (data & MCS7840_DEV_MODE_RESET) ? "low" : "high", 251 (data & MCS7840_DEV_MODE_SER_PRSNT) ? "yes" : "no", 252 (data & MCS7840_DEV_MODE_PLLBYPASS) ? "bypassed" : "avail", 253 (data & MCS7840_DEV_MODE_PORBYPASS) ? "bypassed" : "avail", 254 (data & MCS7840_DEV_MODE_SELECT24S) ? "2" : "4", 255 (data & MCS7840_DEV_MODE_EEPROMWR) ? "enabled" : "disabled", 256 (data & MCS7840_DEV_MODE_IRDA) ? "" : "not "); 257 } 258 259 /* 260 * Set up the interrupt pipe 261 */ 262 id = usbd_get_interface_descriptor(sc->sc_iface); 263 intr_addr = -1; 264 for (i = 0 ; i < id->bNumEndpoints ; i++) { 265 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 266 if (ed == NULL) continue; 267 if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN 268 || UE_GET_XFERTYPE(ed->bmAttributes) != UE_INTERRUPT) 269 continue; 270 sc->sc_intr_buflen = UGETW(ed->wMaxPacketSize); 271 intr_addr = ed->bEndpointAddress; 272 break; 273 } 274 if (intr_addr < 0) { 275 aprint_error_dev(self, "interrupt pipe not found\n"); 276 sc->sc_dying = true; 277 return; 278 } 279 if (sc->sc_intr_buflen == 0) { 280 aprint_error_dev(self, "invalid interrupt endpoint" 281 " (addr %d)\n", intr_addr); 282 sc->sc_dying = true; 283 return; 284 } 285 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_buflen, KM_SLEEP); 286 287 error = usbd_open_pipe_intr(sc->sc_iface, intr_addr, 288 USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf, 289 sc->sc_intr_buflen, umcs7840_intr, 100); 290 if (error) { 291 aprint_error_dev(self, "cannot open interrupt pipe " 292 "(addr %d): error %d\n", intr_addr, error); 293 sc->sc_dying = true; 294 return; 295 } 296 297 usb_init_task(&sc->sc_change_task, umcs7840_change_task, sc, 298 USB_TASKQ_MPSAFE); 299 300 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 301 302 sc->sc_init_state = UMCS_INIT_INITED; 303 304 memset(&ucaa, 0, sizeof(ucaa)); 305 ucaa.ucaa_ibufsize = 256; 306 ucaa.ucaa_obufsize = 256; 307 ucaa.ucaa_ibufsizepad = 256; 308 ucaa.ucaa_opkthdrlen = 0; 309 ucaa.ucaa_device = sc->sc_udev; 310 ucaa.ucaa_iface = sc->sc_iface; 311 ucaa.ucaa_methods = &umcs7840_methods; 312 ucaa.ucaa_arg = sc; 313 314 for (i = 0; i < sc->sc_numports; i++) { 315 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1; 316 317 /* 318 * On four port cards, endpoints are 0/1 for first, 319 * 2/3 for second, ... 320 * On two port cards, they are 0/1 for first, 4/5 for second. 321 * On single port, just 0/1 will be used. 322 */ 323 int phyport = i * (sc->sc_numports == 2 ? 2 : 1); 324 325 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 326 phyport*2); 327 if (ed == NULL) { 328 aprint_error_dev(self, 329 "no bulk in endpoint found for %d\n", i); 330 sc->sc_dying = true; 331 return; 332 } 333 ucaa.ucaa_bulkin = ed->bEndpointAddress; 334 335 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 336 phyport*2 + 1); 337 if (ed == NULL) { 338 aprint_error_dev(self, 339 "no bulk out endpoint found for %d\n", i); 340 return; 341 } 342 ucaa.ucaa_bulkout = ed->bEndpointAddress; 343 ucaa.ucaa_portno = i; 344 DPRINTF(("port %d physical port %d bulk-in %d bulk-out %d\n", 345 i, phyport, ucaa.ucaa_bulkin, ucaa.ucaa_bulkout)); 346 347 sc->sc_ports[i].sc_port_phys = phyport; 348 sc->sc_ports[i].sc_port_ucom = 349 config_found(self, &ucaa, ucomprint, 350 CFARGS(.submatch = ucomsubmatch)); 351 } 352 } 353 354 static int 355 umcs7840_get_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data) 356 { 357 usb_device_request_t req; 358 int err; 359 360 req.bmRequestType = UT_READ_VENDOR_DEVICE; 361 req.bRequest = MCS7840_RDREQ; 362 USETW(req.wValue, 0); 363 USETW(req.wIndex, reg); 364 USETW(req.wLength, UMCS7840_READ_LENGTH); 365 366 err = usbd_do_request(sc->sc_udev, &req, data); 367 if (err) 368 aprint_normal_dev(sc->sc_dev, 369 "Reading register %d failed: %s\n", reg, usbd_errstr(err)); 370 return err; 371 } 372 373 static int 374 umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data) 375 { 376 usb_device_request_t req; 377 int err; 378 379 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 380 req.bRequest = MCS7840_WRREQ; 381 USETW(req.wValue, data); 382 USETW(req.wIndex, reg); 383 USETW(req.wLength, 0); 384 385 err = usbd_do_request(sc->sc_udev, &req, 0); 386 if (err) 387 aprint_normal_dev(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err)); 388 389 return err; 390 } 391 392 static int 393 umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, 394 uint8_t reg, uint8_t *data) 395 { 396 usb_device_request_t req; 397 uint16_t wVal; 398 int err; 399 400 /* portno is port number */ 401 wVal = ((uint16_t)(portno + 1)) << 8; 402 403 req.bmRequestType = UT_READ_VENDOR_DEVICE; 404 req.bRequest = MCS7840_RDREQ; 405 USETW(req.wValue, wVal); 406 USETW(req.wIndex, reg); 407 USETW(req.wLength, UMCS7840_READ_LENGTH); 408 409 err = usbd_do_request(sc->sc_udev, &req, data); 410 if (err) 411 aprint_normal_dev(sc->sc_dev, "Reading UART %d register %d failed: %s\n", portno, reg, usbd_errstr(err)); 412 return err; 413 } 414 415 static int 416 umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data) 417 { 418 usb_device_request_t req; 419 int err; 420 uint16_t wVal; 421 422 /* portno is the physical port number */ 423 wVal = ((uint16_t)(portno + 1)) << 8 | data; 424 425 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 426 req.bRequest = MCS7840_WRREQ; 427 USETW(req.wValue, wVal); 428 USETW(req.wIndex, reg); 429 USETW(req.wLength, 0); 430 431 err = usbd_do_request(sc->sc_udev, &req, NULL); 432 if (err) 433 aprint_error_dev(sc->sc_dev, 434 "Writing UART %d register %d failed: %s\n", 435 portno, reg, usbd_errstr(err)); 436 return err; 437 } 438 439 static int 440 umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, 441 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, 456 rate)); 457 return -1; 458 } 459 DPRINTF(("Port %d set speed: %d (%02x / %d)\n", portno, rate, clk, divisor)); 460 461 /* Set clock source for standard BAUD frequencies */ 462 err = umcs7840_get_reg(sc, spreg, &data); 463 if (err) 464 return err; 465 data &= MCS7840_DEV_SPx_CLOCK_MASK; 466 data |= clk; 467 err = umcs7840_set_reg(sc, spreg, data); 468 if (err) 469 return err; 470 471 /* Set divider */ 472 sc->sc_ports[portno].sc_port_lcr |= MCS7840_UART_LCR_DIVISORS; 473 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 474 if (err) 475 return err; 476 477 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff)); 478 if (err) 479 return err; 480 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLM, (uint8_t)((divisor >> 8) & 0xff)); 481 if (err) 482 return err; 483 484 /* Turn off access to DLL/DLM registers of UART */ 485 sc->sc_ports[portno].sc_port_lcr &= ~MCS7840_UART_LCR_DIVISORS; 486 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 487 if (err) 488 return err; 489 return 0; 490 } 491 492 static int 493 umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk) 494 { 495 /* Maximum speeds for standard frequencies, when PLL is not used */ 496 static const uint32_t umcs7840_baudrate_divisors[] = 497 {0, 115200, 230400, 403200, 460800, 806400, 921600, 498 1572864, 3145728,}; 499 static const uint8_t umcs7840_baudrate_divisors_len = 500 __arraycount(umcs7840_baudrate_divisors); 501 uint8_t i = 0; 502 503 if (rate > umcs7840_baudrate_divisors[umcs7840_baudrate_divisors_len - 1]) 504 return -1; 505 506 for (i = 0; i < umcs7840_baudrate_divisors_len - 1 507 && !(rate > umcs7840_baudrate_divisors[i] 508 && rate <= umcs7840_baudrate_divisors[i + 1]); ++i); 509 *divisor = umcs7840_baudrate_divisors[i + 1] / rate; 510 /* 0x00 .. 0x70 */ 511 *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; 512 return 0; 513 } 514 515 static int 516 umcs7840_detach(device_t self, int flags) 517 { 518 struct umcs7840_softc *sc = device_private(self); 519 int rv = 0, i; 520 521 sc->sc_dying = true; 522 523 /* close interrupt pipe */ 524 if (sc->sc_intr_pipe != NULL) { 525 usbd_abort_pipe(sc->sc_intr_pipe); 526 usbd_close_pipe(sc->sc_intr_pipe); 527 sc->sc_intr_pipe = NULL; 528 } 529 if (sc->sc_intr_buf != NULL) { 530 kmem_free(sc->sc_intr_buf, sc->sc_intr_buflen); 531 sc->sc_intr_buf = NULL; 532 } 533 534 if (sc->sc_init_state < UMCS_INIT_INITED) 535 return 0; 536 537 usb_rem_task_wait(sc->sc_udev, &sc->sc_change_task, USB_TASKQ_DRIVER, 538 NULL); 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 sc->sc_ports[i].sc_port_ucom = NULL; 546 } 547 } 548 549 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 550 551 return rv; 552 } 553 554 static void 555 umcs7840_childdet(device_t self, device_t child) 556 { 557 struct umcs7840_softc *sc = device_private(self); 558 int i; 559 560 for (i = 0; i < sc->sc_numports; i++) { 561 if (child == sc->sc_ports[i].sc_port_ucom) { 562 sc->sc_ports[i].sc_port_ucom = NULL; 563 return; 564 } 565 } 566 } 567 568 static void 569 umcs7840_get_status(void *self, int portno, u_char *lsr, u_char *msr) 570 { 571 struct umcs7840_softc *sc = self; 572 uint8_t pn = sc->sc_ports[portno].sc_port_phys; 573 uint8_t hw_lsr = 0; /* local line status register */ 574 uint8_t hw_msr = 0; /* local modem status register */ 575 576 if (sc->sc_dying) 577 return; 578 579 /* Read LSR & MSR */ 580 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LSR, &hw_lsr); 581 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); 582 583 *lsr = hw_lsr; 584 *msr = hw_msr; 585 } 586 587 static void 588 umcs7840_set(void *self, int portno, int reg, int onoff) 589 { 590 struct umcs7840_softc *sc = self; 591 592 if (sc->sc_dying) 593 return; 594 595 switch (reg) { 596 case UCOM_SET_DTR: 597 umcs7840_dtr(sc, portno, onoff); 598 break; 599 case UCOM_SET_RTS: 600 umcs7840_rts(sc, portno, onoff); 601 break; 602 case UCOM_SET_BREAK: 603 umcs7840_break(sc, portno, onoff); 604 break; 605 default: 606 break; 607 } 608 } 609 610 static int 611 umcs7840_param(void *self, int portno, struct termios *t) 612 { 613 struct umcs7840_softc *sc = self; 614 int pn = sc->sc_ports[portno].sc_port_phys; 615 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 616 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 617 618 if (sc->sc_dying) 619 return EIO; 620 621 if (t->c_cflag & CSTOPB) { 622 lcr |= MCS7840_UART_LCR_STOPB2; 623 } else { 624 lcr |= MCS7840_UART_LCR_STOPB1; 625 } 626 627 lcr &= ~MCS7840_UART_LCR_PARITYMASK; 628 if (t->c_cflag & PARENB) { 629 lcr |= MCS7840_UART_LCR_PARITYON; 630 if (t->c_cflag & PARODD) { 631 lcr = MCS7840_UART_LCR_PARITYODD; 632 } else { 633 lcr = MCS7840_UART_LCR_PARITYEVEN; 634 } 635 } else { 636 lcr &= ~MCS7840_UART_LCR_PARITYON; 637 } 638 639 lcr &= ~MCS7840_UART_LCR_DATALENMASK; 640 switch (t->c_cflag & CSIZE) { 641 case CS5: 642 lcr |= MCS7840_UART_LCR_DATALEN5; 643 break; 644 case CS6: 645 lcr |= MCS7840_UART_LCR_DATALEN6; 646 break; 647 case CS7: 648 lcr |= MCS7840_UART_LCR_DATALEN7; 649 break; 650 case CS8: 651 lcr |= MCS7840_UART_LCR_DATALEN8; 652 break; 653 } 654 655 if (t->c_cflag & CRTSCTS) 656 mcr |= MCS7840_UART_MCR_CTSRTS; 657 else 658 mcr &= ~MCS7840_UART_MCR_CTSRTS; 659 660 if (t->c_cflag & CLOCAL) 661 mcr &= ~MCS7840_UART_MCR_DTRDSR; 662 else 663 mcr |= MCS7840_UART_MCR_DTRDSR; 664 665 sc->sc_ports[portno].sc_port_lcr = lcr; 666 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 667 sc->sc_ports[pn].sc_port_lcr); 668 669 sc->sc_ports[portno].sc_port_mcr = mcr; 670 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 671 sc->sc_ports[pn].sc_port_mcr); 672 673 if (umcs7840_set_baudrate(sc, portno, t->c_ospeed)) 674 return EIO; 675 676 return 0; 677 } 678 679 static void 680 umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff) 681 { 682 int pn = sc->sc_ports[portno].sc_port_phys; 683 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 684 685 if (onoff) 686 mcr |= MCS7840_UART_MCR_DTR; 687 else 688 mcr &= ~MCS7840_UART_MCR_DTR; 689 690 sc->sc_ports[portno].sc_port_mcr = mcr; 691 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 692 sc->sc_ports[pn].sc_port_mcr); 693 } 694 695 static void 696 umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff) 697 { 698 int pn = sc->sc_ports[portno].sc_port_phys; 699 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 700 701 if (onoff) 702 mcr |= MCS7840_UART_MCR_RTS; 703 else 704 mcr &= ~MCS7840_UART_MCR_RTS; 705 706 sc->sc_ports[portno].sc_port_mcr = mcr; 707 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 708 sc->sc_ports[pn].sc_port_mcr); 709 } 710 711 static void 712 umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff) 713 { 714 int pn = sc->sc_ports[portno].sc_port_phys; 715 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 716 717 if (onoff) 718 lcr |= MCS7840_UART_LCR_BREAK; 719 else 720 lcr &= ~MCS7840_UART_LCR_BREAK; 721 722 sc->sc_ports[portno].sc_port_lcr = lcr; 723 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 724 sc->sc_ports[pn].sc_port_lcr); 725 } 726 727 static int 728 umcs7840_port_open(void *self, int portno) 729 { 730 struct umcs7840_softc *sc = self; 731 int pn = sc->sc_ports[portno].sc_port_phys; 732 int spreg = umcs7840_reg_sp(pn); 733 int ctrlreg = umcs7840_reg_ctrl(pn); 734 uint8_t data; 735 736 if (sc->sc_dying) 737 return EIO; 738 739 /* If it very first open, finish global configuration */ 740 if (!sc->sc_init_done) { 741 if (umcs7840_get_reg(sc, MCS7840_DEV_REG_CONTROL1, &data)) 742 return EIO; 743 data |= MCS7840_DEV_CONTROL1_DRIVER_DONE; 744 if (umcs7840_set_reg(sc, MCS7840_DEV_REG_CONTROL1, data)) 745 return EIO; 746 sc->sc_init_done = 1; 747 } 748 749 /* Toggle reset bit on-off */ 750 if (umcs7840_get_reg(sc, spreg, &data)) 751 return EIO; 752 data |= MCS7840_DEV_SPx_UART_RESET; 753 if (umcs7840_set_reg(sc, spreg, data)) 754 return EIO; 755 data &= ~MCS7840_DEV_SPx_UART_RESET; 756 if (umcs7840_set_reg(sc, spreg, data)) 757 return EIO; 758 759 /* Set RS-232 mode */ 760 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_SCRATCHPAD, 761 MCS7840_UART_SCRATCHPAD_RS232)) 762 return EIO; 763 764 /* Disable RX on time of initialization */ 765 if (umcs7840_get_reg(sc, ctrlreg, &data)) 766 return EIO; 767 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 768 if (umcs7840_set_reg(sc, ctrlreg, data)) 769 return EIO; 770 771 /* Disable all interrupts */ 772 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0)) 773 return EIO; 774 775 /* Reset FIFO -- documented */ 776 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 0)) 777 return EIO; 778 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 779 MCS7840_UART_FCR_ENABLE | MCS7840_UART_FCR_FLUSHRHR | 780 MCS7840_UART_FCR_FLUSHTHR | MCS7840_UART_FCR_RTL_1_14)) 781 return EIO; 782 783 /* Set 8 bit, no parity, 1 stop bit -- documented */ 784 sc->sc_ports[pn].sc_port_lcr = 785 MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1; 786 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 787 sc->sc_ports[pn].sc_port_lcr)) 788 return EIO; 789 790 /* 791 * Enable DTR/RTS on modem control, enable modem interrupts -- 792 * documented 793 */ 794 sc->sc_ports[pn].sc_port_mcr = MCS7840_UART_MCR_DTR 795 | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE; 796 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 797 sc->sc_ports[pn].sc_port_mcr)) 798 return EIO; 799 800 /* Clearing Bulkin and Bulkout FIFO */ 801 if (umcs7840_get_reg(sc, spreg, &data)) 802 return EIO; 803 data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO; 804 if (umcs7840_set_reg(sc, spreg, data)) 805 return EIO; 806 data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO 807 | MCS7840_DEV_SPx_RESET_IN_FIFO); 808 if (umcs7840_set_reg(sc, spreg, data)) 809 return EIO; 810 811 /* Set speed 9600 */ 812 if (umcs7840_set_baudrate(sc, portno, 9600)) 813 return EIO; 814 815 816 /* Finally enable all interrupts -- documented */ 817 /* 818 * Copied from vendor driver, I don't know why we should read LCR 819 * here 820 */ 821 if (umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 822 &sc->sc_ports[pn].sc_port_lcr)) 823 return EIO; 824 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 825 MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM)) 826 return EIO; 827 828 /* Enable RX */ 829 if (umcs7840_get_reg(sc, ctrlreg, &data)) 830 return EIO; 831 data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE; 832 if (umcs7840_set_reg(sc, ctrlreg, data)) 833 return EIO; 834 return 0; 835 } 836 837 static void 838 umcs7840_port_close(void *self, int portno) 839 { 840 struct umcs7840_softc *sc = self; 841 int pn = sc->sc_ports[portno].sc_port_phys; 842 int ctrlreg = umcs7840_reg_ctrl(pn); 843 uint8_t data; 844 845 if (sc->sc_dying) 846 return; 847 848 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 0); 849 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0); 850 851 /* Disable RX */ 852 if (umcs7840_get_reg(sc, ctrlreg, &data)) 853 return; 854 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 855 if (umcs7840_set_reg(sc, ctrlreg, data)) 856 return; 857 } 858 859 static void 860 umcs7840_intr(struct usbd_xfer *xfer, void *priv, 861 usbd_status status) 862 { 863 struct umcs7840_softc *sc = priv; 864 u_char *buf = sc->sc_intr_buf; 865 int actlen; 866 int subunit; 867 868 if (sc->sc_dying) 869 return; 870 871 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED 872 || status == USBD_IOERROR) 873 return; 874 875 if (status != USBD_NORMAL_COMPLETION) { 876 aprint_error_dev(sc->sc_dev, 877 "umcs7840_intr: abnormal status: %s\n", 878 usbd_errstr(status)); 879 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 880 return; 881 } 882 883 usbd_get_xfer_status(xfer, NULL, NULL, &actlen, NULL); 884 if (actlen == 5 || actlen == 13) { 885 uint32_t change_mask = 0; 886 /* Check status of all ports */ 887 for (subunit = 0; subunit < sc->sc_numports; subunit++) { 888 uint8_t pn = sc->sc_ports[subunit].sc_port_phys; 889 if (buf[pn] & MCS7840_UART_ISR_NOPENDING) 890 continue; 891 DPRINTF(("Port %d has pending interrupt: %02x " 892 "(FIFO: %02x)\n", pn, 893 buf[pn] & MCS7840_UART_ISR_INTMASK, 894 buf[pn] & (~MCS7840_UART_ISR_INTMASK))); 895 switch (buf[pn] & MCS7840_UART_ISR_INTMASK) { 896 case MCS7840_UART_ISR_RXERR: 897 case MCS7840_UART_ISR_RXHASDATA: 898 case MCS7840_UART_ISR_RXTIMEOUT: 899 case MCS7840_UART_ISR_MSCHANGE: 900 change_mask |= (1U << subunit); 901 break; 902 default: 903 /* Do nothing */ 904 break; 905 } 906 } 907 908 if (change_mask != 0) { 909 atomic_or_32(&sc->sc_change_mask, change_mask); 910 usb_add_task(sc->sc_udev, &sc->sc_change_task, 911 USB_TASKQ_DRIVER); 912 } 913 } else { 914 aprint_error_dev(sc->sc_dev, 915 "Invalid interrupt data length %d", actlen); 916 } 917 } 918 919 static void 920 umcs7840_change_task(void *arg) 921 { 922 struct umcs7840_softc *sc = arg; 923 uint32_t change_mask; 924 int i; 925 926 change_mask = atomic_swap_32(&sc->sc_change_mask, 0); 927 for (i = 0; i < sc->sc_numports; i++) { 928 if (ISSET(change_mask, (1U << i))) 929 ucom_status_change(device_private( 930 sc->sc_ports[i].sc_port_ucom)); 931 } 932 } 933
Indexes created Tue Sep 30 20:09:53 GMT 2025