umcs.c revision 1.10.18.1
1 /* $NetBSD: umcs.c,v 1.10.18.1 2019/06/10 22:07:34 christos 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 1.10.18.1 2019/06/10 22:07:34 christos 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 void umcs7840_childdet(device_t, device_t); 117 118 static void umcs7840_get_status(void *, int, u_char *, u_char *); 119 static void umcs7840_set(void *, int, int, int); 120 static int umcs7840_param(void *, int, struct termios *); 121 static int umcs7840_port_open(void *, int); 122 static void umcs7840_port_close(void *, int); 123 124 struct ucom_methods umcs7840_methods = { 125 .ucom_get_status = umcs7840_get_status, 126 .ucom_set = umcs7840_set, 127 .ucom_param = umcs7840_param, 128 .ucom_open = umcs7840_port_open, 129 .ucom_close = umcs7840_port_close, 130 }; 131 132 static const struct usb_devno umcs7840_devs[] = { 133 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703 }, 134 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7810 }, 135 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7820 }, 136 { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7840 }, 137 { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC2324 } 138 }; 139 #define umcs7840_lookup(v, p) usb_lookup(umcs7840_devs, v, p) 140 141 CFATTACH_DECL2_NEW(umcs, sizeof(struct umcs7840_softc), umcs7840_match, 142 umcs7840_attach, umcs7840_detach, NULL, NULL, 143 umcs7840_childdet); 144 145 static inline int 146 umcs7840_reg_sp(int phyport) 147 { 148 KASSERT(phyport >= 0 && phyport < 4); 149 switch (phyport) { 150 default: 151 case 0: return MCS7840_DEV_REG_SP1; 152 case 1: return MCS7840_DEV_REG_SP2; 153 case 2: return MCS7840_DEV_REG_SP3; 154 case 3: return MCS7840_DEV_REG_SP4; 155 } 156 } 157 158 static inline int 159 umcs7840_reg_ctrl(int phyport) 160 { 161 KASSERT(phyport >= 0 && phyport < 4); 162 switch (phyport) { 163 default: 164 case 0: return MCS7840_DEV_REG_CONTROL1; 165 case 1: return MCS7840_DEV_REG_CONTROL2; 166 case 2: return MCS7840_DEV_REG_CONTROL3; 167 case 3: return MCS7840_DEV_REG_CONTROL4; 168 } 169 } 170 171 static int 172 umcs7840_match(device_t dev, cfdata_t match, void *aux) 173 { 174 struct usb_attach_arg *uaa = aux; 175 176 return umcs7840_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? 177 UMATCH_VENDOR_PRODUCT : UMATCH_NONE; 178 } 179 180 static void 181 umcs7840_attach(device_t parent, device_t self, void *aux) 182 { 183 struct umcs7840_softc *sc = device_private(self); 184 struct usb_attach_arg *uaa = aux; 185 struct usbd_device *dev = uaa->uaa_device; 186 usb_interface_descriptor_t *id; 187 usb_endpoint_descriptor_t *ed; 188 char *devinfop; 189 struct ucom_attach_args ucaa; 190 int error, i, intr_addr; 191 uint8_t data; 192 193 sc->sc_dev = self; 194 sc->sc_udev = uaa->uaa_device; 195 sc->sc_dying = false; 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 sc->sc_dying = true; 200 return; 201 } 202 203 /* get the first interface handle */ 204 error = usbd_device2interface_handle(sc->sc_udev, MCS7840_IFACE_INDEX, 205 &sc->sc_iface); 206 if (error != 0) { 207 aprint_error(": could not get interface handle\n"); 208 sc->sc_dying = true; 209 return; 210 } 211 212 /* 213 * Get number of ports 214 * Documentation (full datasheet) says, that number of ports is 215 * set as MCS7840_DEV_MODE_SELECT24S bit in MODE R/Only 216 * register. But vendor driver uses these undocumented 217 * register & bit. 218 * 219 * Experiments show, that MODE register can have `0' 220 * (4 ports) bit on 2-port device, so use vendor driver's way. 221 * 222 * Also, see notes in header file for these constants. 223 */ 224 umcs7840_get_reg(sc, MCS7840_DEV_REG_GPIO, &data); 225 if (data & MCS7840_DEV_GPIO_4PORTS) { 226 sc->sc_numports = 4; 227 /* physical port no are : 0, 1, 2, 3 */ 228 } else { 229 if (uaa->uaa_product == USB_PRODUCT_MOSCHIP_MCS7810) 230 sc->sc_numports = 1; 231 else { 232 sc->sc_numports = 2; 233 /* physical port no are : 0 and 2 */ 234 } 235 } 236 devinfop = usbd_devinfo_alloc(dev, 0); 237 aprint_normal(": %s\n", devinfop); 238 usbd_devinfo_free(devinfop); 239 aprint_verbose_dev(self, "found %d active ports\n", sc->sc_numports); 240 241 if (!umcs7840_get_reg(sc, MCS7840_DEV_REG_MODE, &data)) { 242 aprint_verbose_dev(self, "On-die confguration: RST: active %s, " 243 "HRD: %s, PLL: %s, POR: %s, Ports: %s, EEPROM write %s, " 244 "IrDA is %savailable\n", 245 (data & MCS7840_DEV_MODE_RESET) ? "low" : "high", 246 (data & MCS7840_DEV_MODE_SER_PRSNT) ? "yes" : "no", 247 (data & MCS7840_DEV_MODE_PLLBYPASS) ? "bypassed" : "avail", 248 (data & MCS7840_DEV_MODE_PORBYPASS) ? "bypassed" : "avail", 249 (data & MCS7840_DEV_MODE_SELECT24S) ? "2" : "4", 250 (data & MCS7840_DEV_MODE_EEPROMWR) ? "enabled" : "disabled", 251 (data & MCS7840_DEV_MODE_IRDA) ? "" : "not "); 252 } 253 254 /* 255 * Set up the interrupt pipe 256 */ 257 id = usbd_get_interface_descriptor(sc->sc_iface); 258 intr_addr = -1; 259 for (i = 0 ; i < id->bNumEndpoints ; i++) { 260 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 261 if (ed == NULL) continue; 262 if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN 263 || UE_GET_XFERTYPE(ed->bmAttributes) != UE_INTERRUPT) 264 continue; 265 sc->sc_intr_buflen = UGETW(ed->wMaxPacketSize); 266 intr_addr = ed->bEndpointAddress; 267 break; 268 } 269 if (intr_addr < 0) { 270 aprint_error_dev(self, "interrupt pipe not found\n"); 271 sc->sc_dying = true; 272 return; 273 } 274 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_buflen, KM_SLEEP); 275 276 error = usbd_open_pipe_intr(sc->sc_iface, intr_addr, 277 USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf, 278 sc->sc_intr_buflen, umcs7840_intr, 100); 279 if (error) { 280 aprint_error_dev(self, "cannot open interrupt pipe " 281 "(addr %d)\n", intr_addr); 282 sc->sc_dying = true; 283 return; 284 } 285 286 usb_init_task(&sc->sc_change_task, umcs7840_change_task, sc, 287 USB_TASKQ_MPSAFE); 288 289 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 290 291 memset(&ucaa, 0, sizeof(ucaa)); 292 ucaa.ucaa_ibufsize = 256; 293 ucaa.ucaa_obufsize = 256; 294 ucaa.ucaa_ibufsizepad = 256; 295 ucaa.ucaa_opkthdrlen = 0; 296 ucaa.ucaa_device = sc->sc_udev; 297 ucaa.ucaa_iface = sc->sc_iface; 298 ucaa.ucaa_methods = &umcs7840_methods; 299 ucaa.ucaa_arg = sc; 300 301 for (i = 0; i < sc->sc_numports; i++) { 302 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1; 303 304 /* 305 * On four port cards, endpoints are 0/1 for first, 306 * 2/3 for second, ... 307 * On two port cards, they are 0/1 for first, 4/5 for second. 308 * On single port, just 0/1 will be used. 309 */ 310 int phyport = i * (sc->sc_numports == 2 ? 2 : 1); 311 312 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 313 phyport*2); 314 if (ed == NULL) { 315 aprint_error_dev(self, 316 "no bulk in endpoint found for %d\n", i); 317 sc->sc_dying = true; 318 return; 319 } 320 ucaa.ucaa_bulkin = ed->bEndpointAddress; 321 322 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, 323 phyport*2 + 1); 324 if (ed == NULL) { 325 aprint_error_dev(self, 326 "no bulk out endpoint found for %d\n", i); 327 return; 328 } 329 ucaa.ucaa_bulkout = ed->bEndpointAddress; 330 ucaa.ucaa_portno = i; 331 DPRINTF(("port %d physical port %d bulk-in %d bulk-out %d\n", 332 i, phyport, ucaa.ucaa_bulkin, ucaa.ucaa_bulkout)); 333 334 sc->sc_ports[i].sc_port_phys = phyport; 335 sc->sc_ports[i].sc_port_ucom = 336 config_found_sm_loc(self, "ucombus", NULL, &ucaa, 337 ucomprint, ucomsubmatch); 338 } 339 } 340 341 static int 342 umcs7840_get_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data) 343 { 344 usb_device_request_t req; 345 int err; 346 347 req.bmRequestType = UT_READ_VENDOR_DEVICE; 348 req.bRequest = MCS7840_RDREQ; 349 USETW(req.wValue, 0); 350 USETW(req.wIndex, reg); 351 USETW(req.wLength, UMCS7840_READ_LENGTH); 352 353 err = usbd_do_request(sc->sc_udev, &req, data); 354 if (err) 355 aprint_normal_dev(sc->sc_dev, 356 "Reading register %d failed: %s\n", reg, usbd_errstr(err)); 357 return err; 358 } 359 360 static int 361 umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data) 362 { 363 usb_device_request_t req; 364 int err; 365 366 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 367 req.bRequest = MCS7840_WRREQ; 368 USETW(req.wValue, data); 369 USETW(req.wIndex, reg); 370 USETW(req.wLength, 0); 371 372 err = usbd_do_request(sc->sc_udev, &req, 0); 373 if (err) 374 aprint_normal_dev(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err)); 375 376 return err; 377 } 378 379 static int 380 umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, 381 uint8_t reg, uint8_t *data) 382 { 383 usb_device_request_t req; 384 uint16_t wVal; 385 int err; 386 387 /* portno is port number */ 388 wVal = ((uint16_t)(portno + 1)) << 8; 389 390 req.bmRequestType = UT_READ_VENDOR_DEVICE; 391 req.bRequest = MCS7840_RDREQ; 392 USETW(req.wValue, wVal); 393 USETW(req.wIndex, reg); 394 USETW(req.wLength, UMCS7840_READ_LENGTH); 395 396 err = usbd_do_request(sc->sc_udev, &req, data); 397 if (err) 398 aprint_normal_dev(sc->sc_dev, "Reading UART %d register %d failed: %s\n", portno, reg, usbd_errstr(err)); 399 return err; 400 } 401 402 static int 403 umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data) 404 { 405 usb_device_request_t req; 406 int err; 407 uint16_t wVal; 408 409 /* portno is the physical port number */ 410 wVal = ((uint16_t)(portno + 1)) << 8 | data; 411 412 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 413 req.bRequest = MCS7840_WRREQ; 414 USETW(req.wValue, wVal); 415 USETW(req.wIndex, reg); 416 USETW(req.wLength, 0); 417 418 err = usbd_do_request(sc->sc_udev, &req, NULL); 419 if (err) 420 aprint_error_dev(sc->sc_dev, 421 "Writing UART %d register %d failed: %s\n", 422 portno, reg, usbd_errstr(err)); 423 return err; 424 } 425 426 static int 427 umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, 428 uint32_t rate) 429 { 430 int err; 431 uint16_t divisor; 432 uint8_t clk; 433 uint8_t data; 434 uint8_t physport = sc->sc_ports[portno].sc_port_phys; 435 int spreg = umcs7840_reg_sp(physport); 436 437 if (umcs7840_calc_baudrate(rate, &divisor, &clk)) { 438 DPRINTF(("Port %d bad speed: %d\n", portno, rate)); 439 return -1; 440 } 441 if (divisor == 0 || (clk & MCS7840_DEV_SPx_CLOCK_MASK) != clk) { 442 DPRINTF(("Port %d bad speed calculation: %d\n", portno, 443 rate)); 444 return -1; 445 } 446 DPRINTF(("Port %d set speed: %d (%02x / %d)\n", portno, rate, clk, divisor)); 447 448 /* Set clock source for standard BAUD frequences */ 449 err = umcs7840_get_reg(sc, spreg, &data); 450 if (err) 451 return err; 452 data &= MCS7840_DEV_SPx_CLOCK_MASK; 453 data |= clk; 454 err = umcs7840_set_reg(sc, spreg, data); 455 if (err) 456 return err; 457 458 /* Set divider */ 459 sc->sc_ports[portno].sc_port_lcr |= MCS7840_UART_LCR_DIVISORS; 460 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); 461 if (err) 462 return err; 463 464 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff)); 465 if (err) 466 return err; 467 err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLM, (uint8_t)((divisor >> 8) & 0xff)); 468 if (err) 469 return err; 470 471 /* Turn off access to DLL/DLM registers of UART */ 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 return 0; 477 } 478 479 static int 480 umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk) 481 { 482 /* Maximum speeds for standard frequences, when PLL is not used */ 483 static const uint32_t umcs7840_baudrate_divisors[] = 484 {0, 115200, 230400, 403200, 460800, 806400, 921600, 485 1572864, 3145728,}; 486 static const uint8_t umcs7840_baudrate_divisors_len = 487 __arraycount(umcs7840_baudrate_divisors); 488 uint8_t i = 0; 489 490 if (rate > umcs7840_baudrate_divisors[umcs7840_baudrate_divisors_len - 1]) 491 return -1; 492 493 for (i = 0; i < umcs7840_baudrate_divisors_len - 1 494 && !(rate > umcs7840_baudrate_divisors[i] 495 && rate <= umcs7840_baudrate_divisors[i + 1]); ++i); 496 *divisor = umcs7840_baudrate_divisors[i + 1] / rate; 497 /* 0x00 .. 0x70 */ 498 *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; 499 return 0; 500 } 501 502 static int 503 umcs7840_detach(device_t self, int flags) 504 { 505 struct umcs7840_softc *sc = device_private(self); 506 int rv = 0, i; 507 508 sc->sc_dying = true; 509 510 /* close interrupt pipe */ 511 if (sc->sc_intr_pipe != NULL) { 512 usbd_abort_pipe(sc->sc_intr_pipe); 513 usbd_close_pipe(sc->sc_intr_pipe); 514 sc->sc_intr_pipe = NULL; 515 } 516 if (sc->sc_intr_buf != NULL) { 517 kmem_free(sc->sc_intr_buf, sc->sc_intr_buflen); 518 sc->sc_intr_buf = NULL; 519 } 520 usb_rem_task_wait(sc->sc_udev, &sc->sc_change_task, USB_TASKQ_DRIVER, 521 NULL); 522 523 /* detach children */ 524 for (i = 0; i < sc->sc_numports; i++) { 525 if (sc->sc_ports[i].sc_port_ucom) { 526 rv |= config_detach(sc->sc_ports[i].sc_port_ucom, 527 flags); 528 sc->sc_ports[i].sc_port_ucom = NULL; 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 static void 538 umcs7840_childdet(device_t self, device_t child) 539 { 540 struct umcs7840_softc *sc = device_private(self); 541 int i; 542 543 for (i = 0; i < sc->sc_numports; i++) { 544 if (child == sc->sc_ports[i].sc_port_ucom) { 545 sc->sc_ports[i].sc_port_ucom = NULL; 546 return; 547 } 548 } 549 } 550 551 static void 552 umcs7840_get_status(void *self, int portno, u_char *lsr, u_char *msr) 553 { 554 struct umcs7840_softc *sc = self; 555 uint8_t pn = sc->sc_ports[portno].sc_port_phys; 556 uint8_t hw_lsr = 0; /* local line status register */ 557 uint8_t hw_msr = 0; /* local modem status register */ 558 559 if (sc->sc_dying) 560 return; 561 562 /* Read LSR & MSR */ 563 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LSR, &hw_lsr); 564 umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); 565 566 *lsr = hw_lsr; 567 *msr = hw_msr; 568 } 569 570 static void 571 umcs7840_set(void *self, int portno, int reg, int onoff) 572 { 573 struct umcs7840_softc *sc = self; 574 575 if (sc->sc_dying) 576 return; 577 578 switch (reg) { 579 case UCOM_SET_DTR: 580 umcs7840_dtr(sc, portno, onoff); 581 break; 582 case UCOM_SET_RTS: 583 umcs7840_rts(sc, portno, onoff); 584 break; 585 case UCOM_SET_BREAK: 586 umcs7840_break(sc, portno, onoff); 587 break; 588 default: 589 break; 590 } 591 } 592 593 static int 594 umcs7840_param(void *self, int portno, struct termios *t) 595 { 596 struct umcs7840_softc *sc = self; 597 int pn = sc->sc_ports[portno].sc_port_phys; 598 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 599 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 600 601 if (sc->sc_dying) 602 return EIO; 603 604 if (t->c_cflag & CSTOPB) { 605 lcr |= MCS7840_UART_LCR_STOPB2; 606 } else { 607 lcr |= MCS7840_UART_LCR_STOPB1; 608 } 609 610 lcr &= ~MCS7840_UART_LCR_PARITYMASK; 611 if (t->c_cflag & PARENB) { 612 lcr |= MCS7840_UART_LCR_PARITYON; 613 if (t->c_cflag & PARODD) { 614 lcr = MCS7840_UART_LCR_PARITYODD; 615 } else { 616 lcr = MCS7840_UART_LCR_PARITYEVEN; 617 } 618 } else { 619 lcr &= ~MCS7840_UART_LCR_PARITYON; 620 } 621 622 lcr &= ~MCS7840_UART_LCR_DATALENMASK; 623 switch (t->c_cflag & CSIZE) { 624 case CS5: 625 lcr |= MCS7840_UART_LCR_DATALEN5; 626 break; 627 case CS6: 628 lcr |= MCS7840_UART_LCR_DATALEN6; 629 break; 630 case CS7: 631 lcr |= MCS7840_UART_LCR_DATALEN7; 632 break; 633 case CS8: 634 lcr |= MCS7840_UART_LCR_DATALEN8; 635 break; 636 } 637 638 if (t->c_cflag & CRTSCTS) 639 mcr |= MCS7840_UART_MCR_CTSRTS; 640 else 641 mcr &= ~MCS7840_UART_MCR_CTSRTS; 642 643 if (t->c_cflag & CLOCAL) 644 mcr &= ~MCS7840_UART_MCR_DTRDSR; 645 else 646 mcr |= MCS7840_UART_MCR_DTRDSR; 647 648 sc->sc_ports[portno].sc_port_lcr = lcr; 649 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 650 sc->sc_ports[pn].sc_port_lcr); 651 652 sc->sc_ports[portno].sc_port_mcr = mcr; 653 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 654 sc->sc_ports[pn].sc_port_mcr); 655 656 if (umcs7840_set_baudrate(sc, portno, t->c_ospeed)) 657 return EIO; 658 659 return 0; 660 } 661 662 static void 663 umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff) 664 { 665 int pn = sc->sc_ports[portno].sc_port_phys; 666 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 667 668 if (onoff) 669 mcr |= MCS7840_UART_MCR_DTR; 670 else 671 mcr &= ~MCS7840_UART_MCR_DTR; 672 673 sc->sc_ports[portno].sc_port_mcr = mcr; 674 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 675 sc->sc_ports[pn].sc_port_mcr); 676 } 677 678 static void 679 umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff) 680 { 681 int pn = sc->sc_ports[portno].sc_port_phys; 682 uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; 683 684 if (onoff) 685 mcr |= MCS7840_UART_MCR_RTS; 686 else 687 mcr &= ~MCS7840_UART_MCR_RTS; 688 689 sc->sc_ports[portno].sc_port_mcr = mcr; 690 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 691 sc->sc_ports[pn].sc_port_mcr); 692 } 693 694 static void 695 umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff) 696 { 697 int pn = sc->sc_ports[portno].sc_port_phys; 698 uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; 699 700 if (onoff) 701 lcr |= MCS7840_UART_LCR_BREAK; 702 else 703 lcr &= ~MCS7840_UART_LCR_BREAK; 704 705 sc->sc_ports[portno].sc_port_lcr = lcr; 706 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 707 sc->sc_ports[pn].sc_port_lcr); 708 } 709 710 static int 711 umcs7840_port_open(void *self, int portno) 712 { 713 struct umcs7840_softc *sc = self; 714 int pn = sc->sc_ports[portno].sc_port_phys; 715 int spreg = umcs7840_reg_sp(pn); 716 int ctrlreg = umcs7840_reg_ctrl(pn); 717 uint8_t data; 718 719 if (sc->sc_dying) 720 return EIO; 721 722 /* If it very first open, finish global configuration */ 723 if (!sc->sc_init_done) { 724 if (umcs7840_get_reg(sc, MCS7840_DEV_REG_CONTROL1, &data)) 725 return EIO; 726 data |= MCS7840_DEV_CONTROL1_DRIVER_DONE; 727 if (umcs7840_set_reg(sc, MCS7840_DEV_REG_CONTROL1, data)) 728 return EIO; 729 sc->sc_init_done = 1; 730 } 731 732 /* Toggle reset bit on-off */ 733 if (umcs7840_get_reg(sc, spreg, &data)) 734 return EIO; 735 data |= MCS7840_DEV_SPx_UART_RESET; 736 if (umcs7840_set_reg(sc, spreg, data)) 737 return EIO; 738 data &= ~MCS7840_DEV_SPx_UART_RESET; 739 if (umcs7840_set_reg(sc, spreg, data)) 740 return EIO; 741 742 /* Set RS-232 mode */ 743 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_SCRATCHPAD, 744 MCS7840_UART_SCRATCHPAD_RS232)) 745 return EIO; 746 747 /* Disable RX on time of initialization */ 748 if (umcs7840_get_reg(sc, ctrlreg, &data)) 749 return EIO; 750 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 751 if (umcs7840_set_reg(sc, ctrlreg, data)) 752 return EIO; 753 754 /* Disable all interrupts */ 755 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0)) 756 return EIO; 757 758 /* Reset FIFO -- documented */ 759 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 0)) 760 return EIO; 761 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 762 MCS7840_UART_FCR_ENABLE | MCS7840_UART_FCR_FLUSHRHR | 763 MCS7840_UART_FCR_FLUSHTHR | MCS7840_UART_FCR_RTL_1_14)) 764 return EIO; 765 766 /* Set 8 bit, no parity, 1 stop bit -- documented */ 767 sc->sc_ports[pn].sc_port_lcr = 768 MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1; 769 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 770 sc->sc_ports[pn].sc_port_lcr)) 771 return EIO; 772 773 /* 774 * Enable DTR/RTS on modem control, enable modem interrupts -- 775 * documented 776 */ 777 sc->sc_ports[pn].sc_port_mcr = MCS7840_UART_MCR_DTR 778 | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE; 779 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 780 sc->sc_ports[pn].sc_port_mcr)) 781 return EIO; 782 783 /* Clearing Bulkin and Bulkout FIFO */ 784 if (umcs7840_get_reg(sc, spreg, &data)) 785 return EIO; 786 data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO; 787 if (umcs7840_set_reg(sc, spreg, data)) 788 return EIO; 789 data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO 790 | MCS7840_DEV_SPx_RESET_IN_FIFO); 791 if (umcs7840_set_reg(sc, spreg, data)) 792 return EIO; 793 794 /* Set speed 9600 */ 795 if (umcs7840_set_baudrate(sc, portno, 9600)) 796 return EIO; 797 798 799 /* Finally enable all interrupts -- documented */ 800 /* 801 * Copied from vendor driver, I don't know why we should read LCR 802 * here 803 */ 804 if (umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LCR, 805 &sc->sc_ports[pn].sc_port_lcr)) 806 return EIO; 807 if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 808 MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM)) 809 return EIO; 810 811 /* Enable RX */ 812 if (umcs7840_get_reg(sc, ctrlreg, &data)) 813 return EIO; 814 data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE; 815 if (umcs7840_set_reg(sc, ctrlreg, data)) 816 return EIO; 817 return 0; 818 } 819 820 static void 821 umcs7840_port_close(void *self, int portno) 822 { 823 struct umcs7840_softc *sc = self; 824 int pn = sc->sc_ports[portno].sc_port_phys; 825 int ctrlreg = umcs7840_reg_ctrl(pn); 826 uint8_t data; 827 828 if (sc->sc_dying) 829 return; 830 831 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 0); 832 umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0); 833 834 /* Disable RX */ 835 if (umcs7840_get_reg(sc, ctrlreg, &data)) 836 return; 837 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 838 if (umcs7840_set_reg(sc, ctrlreg, data)) 839 return; 840 } 841 842 static void 843 umcs7840_intr(struct usbd_xfer *xfer, void *priv, 844 usbd_status status) 845 { 846 struct umcs7840_softc *sc = priv; 847 u_char *buf = sc->sc_intr_buf; 848 int actlen; 849 int subunit; 850 851 if (sc->sc_dying) 852 return; 853 854 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED 855 || status == USBD_IOERROR) 856 return; 857 858 if (status != USBD_NORMAL_COMPLETION) { 859 aprint_error_dev(sc->sc_dev, 860 "umcs7840_intr: abnormal status: %s\n", 861 usbd_errstr(status)); 862 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 863 return; 864 } 865 866 usbd_get_xfer_status(xfer, NULL, NULL, &actlen, NULL); 867 if (actlen == 5 || actlen == 13) { 868 uint32_t change_mask = 0; 869 /* Check status of all ports */ 870 for (subunit = 0; subunit < sc->sc_numports; subunit++) { 871 uint8_t pn = sc->sc_ports[subunit].sc_port_phys; 872 if (buf[pn] & MCS7840_UART_ISR_NOPENDING) 873 continue; 874 DPRINTF(("Port %d has pending interrupt: %02x " 875 "(FIFO: %02x)\n", pn, 876 buf[pn] & MCS7840_UART_ISR_INTMASK, 877 buf[pn] & (~MCS7840_UART_ISR_INTMASK))); 878 switch (buf[pn] & MCS7840_UART_ISR_INTMASK) { 879 case MCS7840_UART_ISR_RXERR: 880 case MCS7840_UART_ISR_RXHASDATA: 881 case MCS7840_UART_ISR_RXTIMEOUT: 882 case MCS7840_UART_ISR_MSCHANGE: 883 change_mask |= (1U << subunit); 884 break; 885 default: 886 /* Do nothing */ 887 break; 888 } 889 } 890 891 if (change_mask != 0) { 892 atomic_or_32(&sc->sc_change_mask, change_mask); 893 usb_add_task(sc->sc_udev, &sc->sc_change_task, 894 USB_TASKQ_DRIVER); 895 } 896 } else { 897 aprint_error_dev(sc->sc_dev, 898 "Invalid interrupt data length %d", actlen); 899 } 900 } 901 902 static void 903 umcs7840_change_task(void *arg) 904 { 905 struct umcs7840_softc *sc = arg; 906 uint32_t change_mask; 907 int i; 908 909 change_mask = atomic_swap_32(&sc->sc_change_mask, 0); 910 for (i = 0; i < sc->sc_numports; i++) { 911 if (ISSET(change_mask, (1U << i))) 912 ucom_status_change(device_private( 913 sc->sc_ports[i].sc_port_ucom)); 914 } 915 } 916
Indexes created Tue Sep 30 20:09:53 GMT 2025