umcs.c revision 1.15.10.1
1 /* $NetBSD: umcs.c,v 1.15.10.1 2021/03/22 02:01:02 thorpej 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 1.15.10.1 2021/03/22 02:01:02 thorpej 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 umcs7840_get_reg(sc, MCS7840_DEV_REG_GPIO, &data); 230 if (data & MCS7840_DEV_GPIO_4PORTS) { 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 confguration: 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 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_buflen, KM_SLEEP); 280 281 error = usbd_open_pipe_intr(sc->sc_iface, intr_addr, 282 USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf, 283 sc->sc_intr_buflen, umcs7840_intr, 100); 284 if (error) { 285 aprint_error_dev(self, "cannot open interrupt pipe " 286 "(addr %d)\n", intr_addr); 287 sc->sc_dying = true; 288 return; 289 } 290 291 usb_init_task(&sc->sc_change_task, umcs7840_change_task, sc, 292 USB_TASKQ_MPSAFE); 293 294 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 295 296 sc->sc_init_state = UMCS_INIT_INITED; 297 298 memset(&ucaa, 0, sizeof(ucaa)); 299 ucaa.ucaa_ibufsize = 256; 300 ucaa.ucaa_obufsize = 256; 301 ucaa.ucaa_ibufsizepad = 256; 302 ucaa.ucaa_opkthdrlen = 0; 303 ucaa.ucaa_device = sc->sc_udev; 304 ucaa.ucaa_iface = sc->sc_iface; 305 ucaa.ucaa_methods = &umcs7840_methods; 306 ucaa.ucaa_arg = sc; 307 308 for (i = 0; i < sc->sc_numports; i++) { 309 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1; 310 311 /* 312 * On four port cards, endpoints are 0/1 for first, 313 * 2/3 for second, ... 314 * On two port cards, they are 0/1 for first, 4/5 for second. 315 * On single port, just 0/1 will be used. 316 */ 317 int phyport = i * (sc->sc_numports == 2 ? 2 : 1); 318 319 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 320 phyport*2); 321 if (ed == NULL) { 322 aprint_error_dev(self, 323 "no bulk in endpoint found for %d\n", i); 324 sc->sc_dying = true; 325 return; 326 } 327 ucaa.ucaa_bulkin = ed->bEndpointAddress; 328 329 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 330 phyport*2 + 1); 331 if (ed == NULL) { 332 aprint_error_dev(self, 333 "no bulk out endpoint found for %d\n", i); 334 return; 335 } 336 ucaa.ucaa_bulkout = ed->bEndpointAddress; 337 ucaa.ucaa_portno = i; 338 DPRINTF(("port %d physical port %d bulk-in %d bulk-out %d\n", 339 i, phyport, ucaa.ucaa_bulkin, ucaa.ucaa_bulkout)); 340 341 sc->sc_ports[i].sc_port_phys = phyport; 342 sc->sc_ports[i].sc_port_ucom = 343 config_found(self, &ucaa, ucomprint, 344 CFARG_SUBMATCH, ucomsubmatch, 345 CFARG_IATTR, "ucombus", 346 CFARG_EOL); 347 } 348 } 349 350 static int 351 umcs7840_get_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data) 352 { 353 usb_device_request_t req; 354 int err; 355 356 req.bmRequestType = UT_READ_VENDOR_DEVICE; 357 req.bRequest = MCS7840_RDREQ; 358 USETW(req.wValue, 0); 359 USETW(req.wIndex, reg); 360 USETW(req.wLength, UMCS7840_READ_LENGTH); 361 362 err = usbd_do_request(sc->sc_udev, &req, data); 363 if (err) 364 aprint_normal_dev(sc->sc_dev, 365 "Reading register %d failed: %s\n", reg, usbd_errstr(err)); 366 return err; 367 } 368 369 static int 370 umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data) 371 { 372 usb_device_request_t req; 373 int err; 374 375 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 376 req.bRequest = MCS7840_WRREQ; 377 USETW(req.wValue, data); 378 USETW(req.wIndex, reg); 379 USETW(req.wLength, 0); 380 381 err = usbd_do_request(sc->sc_udev, &req, 0); 382 if (err) 383 aprint_normal_dev(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err)); 384 385 return err; 386 } 387 388 static int 389 umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, 390 uint8_t reg, uint8_t *data) 391 { 392 usb_device_request_t req; 393 uint16_t wVal; 394 int err; 395 396 /* portno is port number */ 397 wVal = ((uint16_t)(portno + 1)) << 8; 398 399 req.bmRequestType = UT_READ_VENDOR_DEVICE; 400 req.bRequest = MCS7840_RDREQ; 401 USETW(req.wValue, wVal); 402 USETW(req.wIndex, reg); 403 USETW(req.wLength, UMCS7840_READ_LENGTH); 404 405 err = usbd_do_request(sc->sc_udev, &req, data); 406 if (err) 407 aprint_normal_dev(sc->sc_dev, "Reading UART %d register %d failed: %s\n", portno, reg, usbd_errstr(err)); 408 return err; 409 } 410 411 static int 412 umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data) 413 { 414 usb_device_request_t req; 415 int err; 416 uint16_t wVal; 417 418 /* portno is the physical port number */ 419 wVal = ((uint16_t)(portno + 1)) << 8 | data; 420 421 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 422 req.bRequest = MCS7840_WRREQ; 423 USETW(req.wValue, wVal); 424 USETW(req.wIndex, reg); 425 USETW(req.wLength, 0); 426 427 err = usbd_do_request(sc->sc_udev, &req, NULL); 428 if (err) 429 aprint_error_dev(sc->sc_dev, 430 "Writing UART %d register %d failed: %s\n", 431 portno, reg, usbd_errstr(err)); 432 return err; 433 } 434 435 static int 436 umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, 437 uint32_t rate) 438 { 439 int err; 440 uint16_t divisor; 441 uint8_t clk; 442 uint8_t data; 443 uint8_t physport = sc->sc_ports[portno].sc_port_phys; 444 int spreg = umcs7840_reg_sp(physport); 445 446 if (umcs7840_calc_baudrate(rate, &divisor, &clk)) { 447 DPRINTF(("Port %d bad speed: %d\n", portno, rate)); 448 return -1; 449 } 450 if (divisor == 0 || (clk & MCS7840_DEV_SPx_CLOCK_MASK) != clk) { 451 DPRINTF(("Port %d bad speed calculation: %d\n", portno, 452 rate)); 453 return -1; 454 } 455 DPRINTF(("Port %d set speed: %d (%02x / %d)\n", portno, rate, clk, divisor)); 456 457 /* Set clock source for standard BAUD frequences */ 458 err = umcs7840_get_reg(sc, spreg, &data); 459 if (err) 460 return err; 461 data &= MCS7840_DEV_SPx_CLOCK_MASK; 462 data |= clk; 463 err = umcs7840_set_reg(sc, spreg, data); 464 if (err) 465 return err; 466 467 /* Set divider */ 468 sc->sc_ports[portno].sc_port_lcr |= MCS7840_UART_LCR_DIVISORS; 469 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 470 if (err) 471 return err; 472 473 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff)); 474 if (err) 475 return err; 476 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLM, (uint8_t)((divisor >> 8) & 0xff)); 477 if (err) 478 return err; 479 480 /* Turn off access to DLL/DLM registers of UART */ 481 sc->sc_ports[portno].sc_port_lcr &= ~MCS7840_UART_LCR_DIVISORS; 482 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 483 if (err) 484 return err; 485 return 0; 486 } 487 488 static int 489 umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk) 490 { 491 /* Maximum speeds for standard frequences, when PLL is not used */ 492 static const uint32_t umcs7840_baudrate_divisors[] = 493 {0, 115200, 230400, 403200, 460800, 806400, 921600, 494 1572864, 3145728,}; 495 static const uint8_t umcs7840_baudrate_divisors_len = 496 __arraycount(umcs7840_baudrate_divisors); 497 uint8_t i = 0; 498 499 if (rate > umcs7840_baudrate_divisors[umcs7840_baudrate_divisors_len - 1]) 500 return -1; 501 502 for (i = 0; i < umcs7840_baudrate_divisors_len - 1 503 && !(rate > umcs7840_baudrate_divisors[i] 504 && rate <= umcs7840_baudrate_divisors[i + 1]); ++i); 505 *divisor = umcs7840_baudrate_divisors[i + 1] / rate; 506 /* 0x00 .. 0x70 */ 507 *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; 508 return 0; 509 } 510 511 static int 512 umcs7840_detach(device_t self, int flags) 513 { 514 struct umcs7840_softc *sc = device_private(self); 515 int rv = 0, i; 516 517 sc->sc_dying = true; 518 519 /* close interrupt pipe */ 520 if (sc->sc_intr_pipe != NULL) { 521 usbd_abort_pipe(sc->sc_intr_pipe); 522 usbd_close_pipe(sc->sc_intr_pipe); 523 sc->sc_intr_pipe = NULL; 524 } 525 if (sc->sc_intr_buf != NULL) { 526 kmem_free(sc->sc_intr_buf, sc->sc_intr_buflen); 527 sc->sc_intr_buf = NULL; 528 } 529 530 if (sc->sc_init_state < UMCS_INIT_INITED) 531 return 0; 532 533 usb_rem_task_wait(sc->sc_udev, &sc->sc_change_task, USB_TASKQ_DRIVER, 534 NULL); 535 536 /* detach children */ 537 for (i = 0; i < sc->sc_numports; i++) { 538 if (sc->sc_ports[i].sc_port_ucom) { 539 rv |= config_detach(sc->sc_ports[i].sc_port_ucom, 540 flags); 541 sc->sc_ports[i].sc_port_ucom = NULL; 542 } 543 } 544 545 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 546 547 return rv; 548 } 549 550 static void 551 umcs7840_childdet(device_t self, device_t child) 552 { 553 struct umcs7840_softc *sc = device_private(self); 554 int i; 555 556 for (i = 0; i < sc->sc_numports; i++) { 557 if (child == sc->sc_ports[i].sc_port_ucom) { 558 sc->sc_ports[i].sc_port_ucom = NULL; 559 return; 560 } 561 } 562 } 563 564 static void 565 umcs7840_get_status(void *self, int portno, u_char *lsr, u_char *msr) 566 { 567 struct umcs7840_softc *sc = self; 568 uint8_t pn = sc->sc_ports[portno].sc_port_phys; 569 uint8_t hw_lsr = 0; /* local line status register */ 570 uint8_t hw_msr = 0; /* local modem status register */ 571 572 if (sc->sc_dying) 573 return; 574 575 /* Read LSR & MSR */ 576 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LSR, &hw_lsr); 577 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); 578 579 *lsr = hw_lsr; 580 *msr = hw_msr; 581 } 582 583 static void 584 umcs7840_set(void *self, int portno, int reg, int onoff) 585 { 586 struct umcs7840_softc *sc = self; 587 588 if (sc->sc_dying) 589 return; 590 591 switch (reg) { 592 case UCOM_SET_DTR: 593 umcs7840_dtr(sc, portno, onoff); 594 break; 595 case UCOM_SET_RTS: 596 umcs7840_rts(sc, portno, onoff); 597 break; 598 case UCOM_SET_BREAK: 599 umcs7840_break(sc, portno, onoff); 600 break; 601 default: 602 break; 603 } 604 } 605 606 static int 607 umcs7840_param(void *self, int portno, struct termios *t) 608 { 609 struct umcs7840_softc *sc = self; 610 int pn = sc->sc_ports[portno].sc_port_phys; 611 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 612 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 613 614 if (sc->sc_dying) 615 return EIO; 616 617 if (t->c_cflag & CSTOPB) { 618 lcr |= MCS7840_UART_LCR_STOPB2; 619 } else { 620 lcr |= MCS7840_UART_LCR_STOPB1; 621 } 622 623 lcr &= ~MCS7840_UART_LCR_PARITYMASK; 624 if (t->c_cflag & PARENB) { 625 lcr |= MCS7840_UART_LCR_PARITYON; 626 if (t->c_cflag & PARODD) { 627 lcr = MCS7840_UART_LCR_PARITYODD; 628 } else { 629 lcr = MCS7840_UART_LCR_PARITYEVEN; 630 } 631 } else { 632 lcr &= ~MCS7840_UART_LCR_PARITYON; 633 } 634 635 lcr &= ~MCS7840_UART_LCR_DATALENMASK; 636 switch (t->c_cflag & CSIZE) { 637 case CS5: 638 lcr |= MCS7840_UART_LCR_DATALEN5; 639 break; 640 case CS6: 641 lcr |= MCS7840_UART_LCR_DATALEN6; 642 break; 643 case CS7: 644 lcr |= MCS7840_UART_LCR_DATALEN7; 645 break; 646 case CS8: 647 lcr |= MCS7840_UART_LCR_DATALEN8; 648 break; 649 } 650 651 if (t->c_cflag & CRTSCTS) 652 mcr |= MCS7840_UART_MCR_CTSRTS; 653 else 654 mcr &= ~MCS7840_UART_MCR_CTSRTS; 655 656 if (t->c_cflag & CLOCAL) 657 mcr &= ~MCS7840_UART_MCR_DTRDSR; 658 else 659 mcr |= MCS7840_UART_MCR_DTRDSR; 660 661 sc->sc_ports[portno].sc_port_lcr = lcr; 662 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 663 sc->sc_ports[pn].sc_port_lcr); 664 665 sc->sc_ports[portno].sc_port_mcr = mcr; 666 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 667 sc->sc_ports[pn].sc_port_mcr); 668 669 if (umcs7840_set_baudrate(sc, portno, t->c_ospeed)) 670 return EIO; 671 672 return 0; 673 } 674 675 static void 676 umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff) 677 { 678 int pn = sc->sc_ports[portno].sc_port_phys; 679 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 680 681 if (onoff) 682 mcr |= MCS7840_UART_MCR_DTR; 683 else 684 mcr &= ~MCS7840_UART_MCR_DTR; 685 686 sc->sc_ports[portno].sc_port_mcr = mcr; 687 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 688 sc->sc_ports[pn].sc_port_mcr); 689 } 690 691 static void 692 umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff) 693 { 694 int pn = sc->sc_ports[portno].sc_port_phys; 695 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 696 697 if (onoff) 698 mcr |= MCS7840_UART_MCR_RTS; 699 else 700 mcr &= ~MCS7840_UART_MCR_RTS; 701 702 sc->sc_ports[portno].sc_port_mcr = mcr; 703 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 704 sc->sc_ports[pn].sc_port_mcr); 705 } 706 707 static void 708 umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff) 709 { 710 int pn = sc->sc_ports[portno].sc_port_phys; 711 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 712 713 if (onoff) 714 lcr |= MCS7840_UART_LCR_BREAK; 715 else 716 lcr &= ~MCS7840_UART_LCR_BREAK; 717 718 sc->sc_ports[portno].sc_port_lcr = lcr; 719 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 720 sc->sc_ports[pn].sc_port_lcr); 721 } 722 723 static int 724 umcs7840_port_open(void *self, int portno) 725 { 726 struct umcs7840_softc *sc = self; 727 int pn = sc->sc_ports[portno].sc_port_phys; 728 int spreg = umcs7840_reg_sp(pn); 729 int ctrlreg = umcs7840_reg_ctrl(pn); 730 uint8_t data; 731 732 if (sc->sc_dying) 733 return EIO; 734 735 /* If it very first open, finish global configuration */ 736 if (!sc->sc_init_done) { 737 if (umcs7840_get_reg(sc, MCS7840_DEV_REG_CONTROL1, &data)) 738 return EIO; 739 data |= MCS7840_DEV_CONTROL1_DRIVER_DONE; 740 if (umcs7840_set_reg(sc, MCS7840_DEV_REG_CONTROL1, data)) 741 return EIO; 742 sc->sc_init_done = 1; 743 } 744 745 /* Toggle reset bit on-off */ 746 if (umcs7840_get_reg(sc, spreg, &data)) 747 return EIO; 748 data |= MCS7840_DEV_SPx_UART_RESET; 749 if (umcs7840_set_reg(sc, spreg, data)) 750 return EIO; 751 data &= ~MCS7840_DEV_SPx_UART_RESET; 752 if (umcs7840_set_reg(sc, spreg, data)) 753 return EIO; 754 755 /* Set RS-232 mode */ 756 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_SCRATCHPAD, 757 MCS7840_UART_SCRATCHPAD_RS232)) 758 return EIO; 759 760 /* Disable RX on time of initialization */ 761 if (umcs7840_get_reg(sc, ctrlreg, &data)) 762 return EIO; 763 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 764 if (umcs7840_set_reg(sc, ctrlreg, data)) 765 return EIO; 766 767 /* Disable all interrupts */ 768 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0)) 769 return EIO; 770 771 /* Reset FIFO -- documented */ 772 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 0)) 773 return EIO; 774 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 775 MCS7840_UART_FCR_ENABLE | MCS7840_UART_FCR_FLUSHRHR | 776 MCS7840_UART_FCR_FLUSHTHR | MCS7840_UART_FCR_RTL_1_14)) 777 return EIO; 778 779 /* Set 8 bit, no parity, 1 stop bit -- documented */ 780 sc->sc_ports[pn].sc_port_lcr = 781 MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1; 782 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 783 sc->sc_ports[pn].sc_port_lcr)) 784 return EIO; 785 786 /* 787 * Enable DTR/RTS on modem control, enable modem interrupts -- 788 * documented 789 */ 790 sc->sc_ports[pn].sc_port_mcr = MCS7840_UART_MCR_DTR 791 | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE; 792 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 793 sc->sc_ports[pn].sc_port_mcr)) 794 return EIO; 795 796 /* Clearing Bulkin and Bulkout FIFO */ 797 if (umcs7840_get_reg(sc, spreg, &data)) 798 return EIO; 799 data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO; 800 if (umcs7840_set_reg(sc, spreg, data)) 801 return EIO; 802 data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO 803 | MCS7840_DEV_SPx_RESET_IN_FIFO); 804 if (umcs7840_set_reg(sc, spreg, data)) 805 return EIO; 806 807 /* Set speed 9600 */ 808 if (umcs7840_set_baudrate(sc, portno, 9600)) 809 return EIO; 810 811 812 /* Finally enable all interrupts -- documented */ 813 /* 814 * Copied from vendor driver, I don't know why we should read LCR 815 * here 816 */ 817 if (umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 818 &sc->sc_ports[pn].sc_port_lcr)) 819 return EIO; 820 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 821 MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM)) 822 return EIO; 823 824 /* Enable RX */ 825 if (umcs7840_get_reg(sc, ctrlreg, &data)) 826 return EIO; 827 data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE; 828 if (umcs7840_set_reg(sc, ctrlreg, data)) 829 return EIO; 830 return 0; 831 } 832 833 static void 834 umcs7840_port_close(void *self, int portno) 835 { 836 struct umcs7840_softc *sc = self; 837 int pn = sc->sc_ports[portno].sc_port_phys; 838 int ctrlreg = umcs7840_reg_ctrl(pn); 839 uint8_t data; 840 841 if (sc->sc_dying) 842 return; 843 844 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 0); 845 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0); 846 847 /* Disable RX */ 848 if (umcs7840_get_reg(sc, ctrlreg, &data)) 849 return; 850 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 851 if (umcs7840_set_reg(sc, ctrlreg, data)) 852 return; 853 } 854 855 static void 856 umcs7840_intr(struct usbd_xfer *xfer, void *priv, 857 usbd_status status) 858 { 859 struct umcs7840_softc *sc = priv; 860 u_char *buf = sc->sc_intr_buf; 861 int actlen; 862 int subunit; 863 864 if (sc->sc_dying) 865 return; 866 867 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED 868 || status == USBD_IOERROR) 869 return; 870 871 if (status != USBD_NORMAL_COMPLETION) { 872 aprint_error_dev(sc->sc_dev, 873 "umcs7840_intr: abnormal status: %s\n", 874 usbd_errstr(status)); 875 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 876 return; 877 } 878 879 usbd_get_xfer_status(xfer, NULL, NULL, &actlen, NULL); 880 if (actlen == 5 || actlen == 13) { 881 uint32_t change_mask = 0; 882 /* Check status of all ports */ 883 for (subunit = 0; subunit < sc->sc_numports; subunit++) { 884 uint8_t pn = sc->sc_ports[subunit].sc_port_phys; 885 if (buf[pn] & MCS7840_UART_ISR_NOPENDING) 886 continue; 887 DPRINTF(("Port %d has pending interrupt: %02x " 888 "(FIFO: %02x)\n", pn, 889 buf[pn] & MCS7840_UART_ISR_INTMASK, 890 buf[pn] & (~MCS7840_UART_ISR_INTMASK))); 891 switch (buf[pn] & MCS7840_UART_ISR_INTMASK) { 892 case MCS7840_UART_ISR_RXERR: 893 case MCS7840_UART_ISR_RXHASDATA: 894 case MCS7840_UART_ISR_RXTIMEOUT: 895 case MCS7840_UART_ISR_MSCHANGE: 896 change_mask |= (1U << subunit); 897 break; 898 default: 899 /* Do nothing */ 900 break; 901 } 902 } 903 904 if (change_mask != 0) { 905 atomic_or_32(&sc->sc_change_mask, change_mask); 906 usb_add_task(sc->sc_udev, &sc->sc_change_task, 907 USB_TASKQ_DRIVER); 908 } 909 } else { 910 aprint_error_dev(sc->sc_dev, 911 "Invalid interrupt data length %d", actlen); 912 } 913 } 914 915 static void 916 umcs7840_change_task(void *arg) 917 { 918 struct umcs7840_softc *sc = arg; 919 uint32_t change_mask; 920 int i; 921 922 change_mask = atomic_swap_32(&sc->sc_change_mask, 0); 923 for (i = 0; i < sc->sc_numports; i++) { 924 if (ISSET(change_mask, (1U << i))) 925 ucom_status_change(device_private( 926 sc->sc_ports[i].sc_port_ucom)); 927 } 928 } 929
Indexes created Tue Sep 30 20:09:53 GMT 2025