1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010 Lev Serebryakov <lev@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * This driver supports several multiport USB-to-RS232 serial adapters driven 31 * by MosChip mos7820 and mos7840, bridge chips. 32 * The adapters are sold under many different brand names. 33 * 34 * Datasheets are available at MosChip www site at 35 * http://www.moschip.com. The datasheets don't contain full 36 * programming information for the chip. 37 * 38 * It is nornal to have only two enabled ports in devices, based on 39 * quad-port mos7840. 40 * 41 */ 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/stdint.h> 46 #include <sys/stddef.h> 47 #include <sys/param.h> 48 #include <sys/queue.h> 49 #include <sys/types.h> 50 #include <sys/systm.h> 51 #include <sys/kernel.h> 52 #include <sys/bus.h> 53 #include <sys/linker_set.h> 54 #include <sys/module.h> 55 #include <sys/lock.h> 56 #include <sys/mutex.h> 57 #include <sys/condvar.h> 58 #include <sys/sysctl.h> 59 #include <sys/sx.h> 60 #include <sys/unistd.h> 61 #include <sys/callout.h> 62 #include <sys/malloc.h> 63 #include <sys/priv.h> 64 65 #include <dev/usb/usb.h> 66 #include <dev/usb/usbdi.h> 67 #include <dev/usb/usbdi_util.h> 68 #include <dev/usb/usb_cdc.h> 69 #include "usbdevs.h" 70 71 #define USB_DEBUG_VAR umcs_debug 72 #include <dev/usb/usb_debug.h> 73 #include <dev/usb/usb_process.h> 74 75 #include <dev/usb/serial/usb_serial.h> 76 77 #include <dev/usb/serial/umcs.h> 78 79 #define UMCS7840_MODVER 1 80 81 #ifdef USB_DEBUG 82 static int umcs_debug = 0; 83 84 static SYSCTL_NODE(_hw_usb, OID_AUTO, umcs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 85 "USB umcs quadport serial adapter"); 86 SYSCTL_INT(_hw_usb_umcs, OID_AUTO, debug, CTLFLAG_RWTUN, &umcs_debug, 0, "Debug level"); 87 #endif /* USB_DEBUG */ 88 89 /* 90 * Two-port devices (both with 7820 chip and 7840 chip configured as two-port) 91 * have ports 0 and 2, with ports 1 and 3 omitted. 92 * So,PHYSICAL port numbers (indexes) on two-port device will be 0 and 2. 93 * This driver trys to use physical numbers as much as possible. 94 */ 95 96 /* 97 * Indexed by PHYSICAL port number. 98 * Pack non-regular registers to array to easier if-less access. 99 */ 100 struct umcs7840_port_registers { 101 uint8_t reg_sp; /* SP register. */ 102 uint8_t reg_control; /* CONTROL register. */ 103 uint8_t reg_dcr; /* DCR0 register. DCR1 & DCR2 can be 104 * calculated */ 105 }; 106 107 static const struct umcs7840_port_registers umcs7840_port_registers[UMCS7840_MAX_PORTS] = { 108 {.reg_sp = MCS7840_DEV_REG_SP1,.reg_control = MCS7840_DEV_REG_CONTROL1,.reg_dcr = MCS7840_DEV_REG_DCR0_1}, 109 {.reg_sp = MCS7840_DEV_REG_SP2,.reg_control = MCS7840_DEV_REG_CONTROL2,.reg_dcr = MCS7840_DEV_REG_DCR0_2}, 110 {.reg_sp = MCS7840_DEV_REG_SP3,.reg_control = MCS7840_DEV_REG_CONTROL3,.reg_dcr = MCS7840_DEV_REG_DCR0_3}, 111 {.reg_sp = MCS7840_DEV_REG_SP4,.reg_control = MCS7840_DEV_REG_CONTROL4,.reg_dcr = MCS7840_DEV_REG_DCR0_4}, 112 }; 113 114 enum { 115 UMCS7840_BULK_RD_EP, 116 UMCS7840_BULK_WR_EP, 117 UMCS7840_N_TRANSFERS 118 }; 119 120 struct umcs7840_softc_oneport { 121 struct usb_xfer *sc_xfer[UMCS7840_N_TRANSFERS]; /* Control structures 122 * for two transfers */ 123 124 uint8_t sc_lcr; /* local line control register */ 125 uint8_t sc_mcr; /* local modem control register */ 126 }; 127 128 struct umcs7840_softc { 129 struct ucom_super_softc sc_super_ucom; 130 struct ucom_softc sc_ucom[UMCS7840_MAX_PORTS]; /* Need to be continuous 131 * array, so indexed by 132 * LOGICAL port 133 * (subunit) number */ 134 135 struct usb_xfer *sc_intr_xfer; /* Interrupt endpoint */ 136 137 device_t sc_dev; /* Device for error prints */ 138 struct usb_device *sc_udev; /* USB Device for all operations */ 139 struct mtx sc_mtx; /* ucom requires this */ 140 141 uint8_t sc_driver_done; /* Flag when enumeration is finished */ 142 143 uint8_t sc_numports; /* Number of ports (subunits) */ 144 struct umcs7840_softc_oneport sc_ports[UMCS7840_MAX_PORTS]; /* Indexed by PHYSICAL 145 * port number. */ 146 }; 147 148 /* prototypes */ 149 static usb_error_t umcs7840_get_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t *); 150 static usb_error_t umcs7840_set_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t); 151 static usb_error_t umcs7840_get_UART_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t *); 152 static usb_error_t umcs7840_set_UART_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t); 153 154 static usb_error_t umcs7840_set_baudrate(struct umcs7840_softc *, uint8_t, uint32_t); 155 static usb_error_t umcs7840_calc_baudrate(uint32_t rate, uint16_t *, uint8_t *); 156 157 static void umcs7840_free(struct ucom_softc *); 158 static void umcs7840_cfg_get_status(struct ucom_softc *, uint8_t *, uint8_t *); 159 static void umcs7840_cfg_set_dtr(struct ucom_softc *, uint8_t); 160 static void umcs7840_cfg_set_rts(struct ucom_softc *, uint8_t); 161 static void umcs7840_cfg_set_break(struct ucom_softc *, uint8_t); 162 static void umcs7840_cfg_param(struct ucom_softc *, struct termios *); 163 static void umcs7840_cfg_open(struct ucom_softc *); 164 static void umcs7840_cfg_close(struct ucom_softc *); 165 166 static int umcs7840_pre_param(struct ucom_softc *, struct termios *); 167 168 static void umcs7840_start_read(struct ucom_softc *); 169 static void umcs7840_stop_read(struct ucom_softc *); 170 171 static void umcs7840_start_write(struct ucom_softc *); 172 static void umcs7840_stop_write(struct ucom_softc *); 173 174 static void umcs7840_poll(struct ucom_softc *ucom); 175 176 static device_probe_t umcs7840_probe; 177 static device_attach_t umcs7840_attach; 178 static device_detach_t umcs7840_detach; 179 static void umcs7840_free_softc(struct umcs7840_softc *); 180 181 static usb_callback_t umcs7840_intr_callback; 182 static usb_callback_t umcs7840_read_callback1; 183 static usb_callback_t umcs7840_read_callback2; 184 static usb_callback_t umcs7840_read_callback3; 185 static usb_callback_t umcs7840_read_callback4; 186 static usb_callback_t umcs7840_write_callback1; 187 static usb_callback_t umcs7840_write_callback2; 188 static usb_callback_t umcs7840_write_callback3; 189 static usb_callback_t umcs7840_write_callback4; 190 191 static void umcs7840_read_callbackN(struct usb_xfer *, usb_error_t, uint8_t); 192 static void umcs7840_write_callbackN(struct usb_xfer *, usb_error_t, uint8_t); 193 194 /* Indexed by LOGICAL port number (subunit), so two-port device uses 0 & 1 */ 195 static usb_callback_t *umcs7840_rw_callbacks[UMCS7840_MAX_PORTS][UMCS7840_N_TRANSFERS] = { 196 {&umcs7840_read_callback1, &umcs7840_write_callback1}, 197 {&umcs7840_read_callback2, &umcs7840_write_callback2}, 198 {&umcs7840_read_callback3, &umcs7840_write_callback3}, 199 {&umcs7840_read_callback4, &umcs7840_write_callback4}, 200 }; 201 202 static const struct usb_config umcs7840_bulk_config_data[UMCS7840_N_TRANSFERS] = { 203 [UMCS7840_BULK_RD_EP] = { 204 .type = UE_BULK, 205 .endpoint = 0x01, 206 .direction = UE_DIR_IN, 207 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 208 .bufsize = 0, /* use wMaxPacketSize */ 209 .callback = &umcs7840_read_callback1, 210 .if_index = 0, 211 }, 212 213 [UMCS7840_BULK_WR_EP] = { 214 .type = UE_BULK, 215 .endpoint = 0x02, 216 .direction = UE_DIR_OUT, 217 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 218 .bufsize = 0, /* use wMaxPacketSize */ 219 .callback = &umcs7840_write_callback1, 220 .if_index = 0, 221 }, 222 }; 223 224 static const struct usb_config umcs7840_intr_config_data[1] = { 225 [0] = { 226 .type = UE_INTERRUPT, 227 .endpoint = 0x09, 228 .direction = UE_DIR_IN, 229 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 230 .bufsize = 0, /* use wMaxPacketSize */ 231 .callback = &umcs7840_intr_callback, 232 .if_index = 0, 233 }, 234 }; 235 236 static struct ucom_callback umcs7840_callback = { 237 .ucom_cfg_get_status = &umcs7840_cfg_get_status, 238 239 .ucom_cfg_set_dtr = &umcs7840_cfg_set_dtr, 240 .ucom_cfg_set_rts = &umcs7840_cfg_set_rts, 241 .ucom_cfg_set_break = &umcs7840_cfg_set_break, 242 243 .ucom_cfg_param = &umcs7840_cfg_param, 244 .ucom_cfg_open = &umcs7840_cfg_open, 245 .ucom_cfg_close = &umcs7840_cfg_close, 246 247 .ucom_pre_param = &umcs7840_pre_param, 248 249 .ucom_start_read = &umcs7840_start_read, 250 .ucom_stop_read = &umcs7840_stop_read, 251 252 .ucom_start_write = &umcs7840_start_write, 253 .ucom_stop_write = &umcs7840_stop_write, 254 255 .ucom_poll = &umcs7840_poll, 256 .ucom_free = &umcs7840_free, 257 }; 258 259 static const STRUCT_USB_HOST_ID umcs7840_devs[] = { 260 {USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7820, 0)}, 261 {USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7840, 0)}, 262 }; 263 264 static device_method_t umcs7840_methods[] = { 265 DEVMETHOD(device_probe, umcs7840_probe), 266 DEVMETHOD(device_attach, umcs7840_attach), 267 DEVMETHOD(device_detach, umcs7840_detach), 268 DEVMETHOD_END 269 }; 270 271 static driver_t umcs7840_driver = { 272 .name = "umcs7840", 273 .methods = umcs7840_methods, 274 .size = sizeof(struct umcs7840_softc), 275 }; 276 277 DRIVER_MODULE(umcs7840, uhub, umcs7840_driver, 0, 0); 278 MODULE_DEPEND(umcs7840, ucom, 1, 1, 1); 279 MODULE_DEPEND(umcs7840, usb, 1, 1, 1); 280 MODULE_VERSION(umcs7840, UMCS7840_MODVER); 281 USB_PNP_HOST_INFO(umcs7840_devs); 282 283 static int 284 umcs7840_probe(device_t dev) 285 { 286 struct usb_attach_arg *uaa = device_get_ivars(dev); 287 288 if (uaa->usb_mode != USB_MODE_HOST) 289 return (ENXIO); 290 if (uaa->info.bConfigIndex != MCS7840_CONFIG_INDEX) 291 return (ENXIO); 292 if (uaa->info.bIfaceIndex != MCS7840_IFACE_INDEX) 293 return (ENXIO); 294 return (usbd_lookup_id_by_uaa(umcs7840_devs, sizeof(umcs7840_devs), uaa)); 295 } 296 297 static int 298 umcs7840_attach(device_t dev) 299 { 300 struct usb_config umcs7840_config_tmp[UMCS7840_N_TRANSFERS]; 301 struct usb_attach_arg *uaa = device_get_ivars(dev); 302 struct umcs7840_softc *sc = device_get_softc(dev); 303 304 uint8_t iface_index = MCS7840_IFACE_INDEX; 305 int error; 306 int subunit; 307 int n; 308 uint8_t data; 309 310 for (n = 0; n < UMCS7840_N_TRANSFERS; ++n) 311 umcs7840_config_tmp[n] = umcs7840_bulk_config_data[n]; 312 313 device_set_usb_desc(dev); 314 mtx_init(&sc->sc_mtx, "umcs7840", NULL, MTX_DEF); 315 ucom_ref(&sc->sc_super_ucom); 316 317 sc->sc_dev = dev; 318 sc->sc_udev = uaa->device; 319 320 /* 321 * Get number of ports 322 * Documentation (full datasheet) says, that number of ports is 323 * set as MCS7840_DEV_MODE_SELECT24S bit in MODE R/Only 324 * register. But vendor driver uses these undocumented 325 * register & bit. 326 * 327 * Experiments show, that MODE register can have `0' 328 * (4 ports) bit on 2-port device, so use vendor driver's way. 329 * 330 * Also, see notes in header file for these constants. 331 */ 332 umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_GPIO, &data); 333 if (data & MCS7840_DEV_GPIO_4PORTS) { 334 sc->sc_numports = 4; 335 /* Store physical port numbers in sc_portno */ 336 sc->sc_ucom[0].sc_portno = 0; 337 sc->sc_ucom[1].sc_portno = 1; 338 sc->sc_ucom[2].sc_portno = 2; 339 sc->sc_ucom[3].sc_portno = 3; 340 } else { 341 sc->sc_numports = 2; 342 /* Store physical port numbers in sc_portno */ 343 sc->sc_ucom[0].sc_portno = 0; 344 sc->sc_ucom[1].sc_portno = 2; /* '1' is skipped */ 345 } 346 device_printf(dev, "Chip mcs%04x, found %d active ports\n", uaa->info.idProduct, sc->sc_numports); 347 if (!umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_MODE, &data)) { 348 device_printf(dev, "On-die confguration: RST: active %s, HRD: %s, PLL: %s, POR: %s, Ports: %s, EEPROM write %s, IrDA is %savailable\n", 349 (data & MCS7840_DEV_MODE_RESET) ? "low" : "high", 350 (data & MCS7840_DEV_MODE_SER_PRSNT) ? "yes" : "no", 351 (data & MCS7840_DEV_MODE_PLLBYPASS) ? "bypassed" : "avail", 352 (data & MCS7840_DEV_MODE_PORBYPASS) ? "bypassed" : "avail", 353 (data & MCS7840_DEV_MODE_SELECT24S) ? "2" : "4", 354 (data & MCS7840_DEV_MODE_EEPROMWR) ? "enabled" : "disabled", 355 (data & MCS7840_DEV_MODE_IRDA) ? "" : "not "); 356 } 357 /* Setup all transfers */ 358 for (subunit = 0; subunit < sc->sc_numports; ++subunit) { 359 for (n = 0; n < UMCS7840_N_TRANSFERS; ++n) { 360 /* Set endpoint address */ 361 umcs7840_config_tmp[n].endpoint = umcs7840_bulk_config_data[n].endpoint + 2 * sc->sc_ucom[subunit].sc_portno; 362 umcs7840_config_tmp[n].callback = umcs7840_rw_callbacks[subunit][n]; 363 } 364 error = usbd_transfer_setup(uaa->device, 365 &iface_index, sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer, umcs7840_config_tmp, 366 UMCS7840_N_TRANSFERS, sc, &sc->sc_mtx); 367 if (error) { 368 device_printf(dev, "allocating USB transfers failed for subunit %d of %d\n", 369 subunit + 1, sc->sc_numports); 370 goto detach; 371 } 372 } 373 error = usbd_transfer_setup(uaa->device, 374 &iface_index, &sc->sc_intr_xfer, umcs7840_intr_config_data, 375 1, sc, &sc->sc_mtx); 376 if (error) { 377 device_printf(dev, "allocating USB transfers failed for interrupt\n"); 378 goto detach; 379 } 380 /* clear stall at first run */ 381 mtx_lock(&sc->sc_mtx); 382 for (subunit = 0; subunit < sc->sc_numports; ++subunit) { 383 usbd_xfer_set_stall(sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer[UMCS7840_BULK_RD_EP]); 384 usbd_xfer_set_stall(sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer[UMCS7840_BULK_WR_EP]); 385 } 386 mtx_unlock(&sc->sc_mtx); 387 388 error = ucom_attach(&sc->sc_super_ucom, sc->sc_ucom, sc->sc_numports, sc, 389 &umcs7840_callback, &sc->sc_mtx); 390 if (error) 391 goto detach; 392 393 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); 394 395 return (0); 396 397 detach: 398 umcs7840_detach(dev); 399 return (ENXIO); 400 } 401 402 static int 403 umcs7840_detach(device_t dev) 404 { 405 struct umcs7840_softc *sc = device_get_softc(dev); 406 int subunit; 407 408 ucom_detach(&sc->sc_super_ucom, sc->sc_ucom); 409 410 for (subunit = 0; subunit < sc->sc_numports; ++subunit) 411 usbd_transfer_unsetup(sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer, UMCS7840_N_TRANSFERS); 412 usbd_transfer_unsetup(&sc->sc_intr_xfer, 1); 413 414 device_claim_softc(dev); 415 416 umcs7840_free_softc(sc); 417 418 return (0); 419 } 420 421 UCOM_UNLOAD_DRAIN(umcs7840); 422 423 static void 424 umcs7840_free_softc(struct umcs7840_softc *sc) 425 { 426 if (ucom_unref(&sc->sc_super_ucom)) { 427 mtx_destroy(&sc->sc_mtx); 428 device_free_softc(sc); 429 } 430 } 431 432 static void 433 umcs7840_free(struct ucom_softc *ucom) 434 { 435 umcs7840_free_softc(ucom->sc_parent); 436 } 437 438 static void 439 umcs7840_cfg_open(struct ucom_softc *ucom) 440 { 441 struct umcs7840_softc *sc = ucom->sc_parent; 442 uint16_t pn = ucom->sc_portno; 443 uint8_t data; 444 445 /* If it very first open, finish global configuration */ 446 if (!sc->sc_driver_done) { 447 /* 448 * USB enumeration is finished, pass internal memory to FIFOs 449 * If it is done in the end of "attach", kernel panics. 450 */ 451 if (umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_CONTROL1, &data)) 452 return; 453 data |= MCS7840_DEV_CONTROL1_DRIVER_DONE; 454 if (umcs7840_set_reg_sync(sc, MCS7840_DEV_REG_CONTROL1, data)) 455 return; 456 sc->sc_driver_done = 1; 457 } 458 /* Toggle reset bit on-off */ 459 if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, &data)) 460 return; 461 data |= MCS7840_DEV_SPx_UART_RESET; 462 if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data)) 463 return; 464 data &= ~MCS7840_DEV_SPx_UART_RESET; 465 if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data)) 466 return; 467 468 /* Set RS-232 mode */ 469 if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_SCRATCHPAD, MCS7840_UART_SCRATCHPAD_RS232)) 470 return; 471 472 /* Disable RX on time of initialization */ 473 if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data)) 474 return; 475 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 476 if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data)) 477 return; 478 479 /* Disable all interrupts */ 480 if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_IER, 0)) 481 return; 482 483 /* Reset FIFO -- documented */ 484 if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_FCR, 0)) 485 return; 486 if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_FCR, 487 MCS7840_UART_FCR_ENABLE | MCS7840_UART_FCR_FLUSHRHR | 488 MCS7840_UART_FCR_FLUSHTHR | MCS7840_UART_FCR_RTL_1_14)) 489 return; 490 491 /* Set 8 bit, no parity, 1 stop bit -- documented */ 492 sc->sc_ports[pn].sc_lcr = MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1; 493 if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_lcr)) 494 return; 495 496 /* 497 * Enable DTR/RTS on modem control, enable modem interrupts -- 498 * documented 499 */ 500 sc->sc_ports[pn].sc_mcr = MCS7840_UART_MCR_IE; 501 if (ucom->sc_tty == NULL || (ucom->sc_tty->t_termios.c_cflag & CNO_RTSDTR) == 0) 502 sc->sc_ports[pn].sc_mcr |= MCS7840_UART_MCR_DTR | MCS7840_UART_MCR_RTS; 503 if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr)) 504 return; 505 506 /* Clearing Bulkin and Bulkout FIFO */ 507 if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, &data)) 508 return; 509 data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO; 510 if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data)) 511 return; 512 data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO); 513 if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data)) 514 return; 515 516 /* Set speed 9600 */ 517 if (umcs7840_set_baudrate(sc, pn, 9600)) 518 return; 519 520 /* Finally enable all interrupts -- documented */ 521 /* 522 * Copied from vendor driver, I don't know why we should read LCR 523 * here 524 */ 525 if (umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, &sc->sc_ports[pn].sc_lcr)) 526 return; 527 if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_IER, 528 MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM)) 529 return; 530 531 /* Enable RX */ 532 if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data)) 533 return; 534 data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE; 535 if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data)) 536 return; 537 538 DPRINTF("Port %d has been opened\n", pn); 539 } 540 541 static void 542 umcs7840_cfg_close(struct ucom_softc *ucom) 543 { 544 struct umcs7840_softc *sc = ucom->sc_parent; 545 uint16_t pn = ucom->sc_portno; 546 uint8_t data; 547 548 umcs7840_stop_read(ucom); 549 umcs7840_stop_write(ucom); 550 551 umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, 0); 552 umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_IER, 0); 553 554 /* Disable RX */ 555 if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data)) 556 return; 557 data |= MCS7840_DEV_CONTROLx_RX_DISABLE; 558 if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data)) 559 return; 560 DPRINTF("Port %d has been closed\n", pn); 561 } 562 563 static void 564 umcs7840_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff) 565 { 566 struct umcs7840_softc *sc = ucom->sc_parent; 567 uint8_t pn = ucom->sc_portno; 568 569 if (onoff) 570 sc->sc_ports[pn].sc_mcr |= MCS7840_UART_MCR_DTR; 571 else 572 sc->sc_ports[pn].sc_mcr &= ~MCS7840_UART_MCR_DTR; 573 574 umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr); 575 DPRINTF("Port %d DTR set to: %s\n", pn, onoff ? "on" : "off"); 576 } 577 578 static void 579 umcs7840_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff) 580 { 581 struct umcs7840_softc *sc = ucom->sc_parent; 582 uint8_t pn = ucom->sc_portno; 583 584 if (onoff) 585 sc->sc_ports[pn].sc_mcr |= MCS7840_UART_MCR_RTS; 586 else 587 sc->sc_ports[pn].sc_mcr &= ~MCS7840_UART_MCR_RTS; 588 589 umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr); 590 DPRINTF("Port %d RTS set to: %s\n", pn, onoff ? "on" : "off"); 591 } 592 593 static void 594 umcs7840_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) 595 { 596 struct umcs7840_softc *sc = ucom->sc_parent; 597 uint8_t pn = ucom->sc_portno; 598 599 if (onoff) 600 sc->sc_ports[pn].sc_lcr |= MCS7840_UART_LCR_BREAK; 601 else 602 sc->sc_ports[pn].sc_lcr &= ~MCS7840_UART_LCR_BREAK; 603 604 umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_lcr); 605 DPRINTF("Port %d BREAK set to: %s\n", pn, onoff ? "on" : "off"); 606 } 607 608 static void 609 umcs7840_cfg_param(struct ucom_softc *ucom, struct termios *t) 610 { 611 struct umcs7840_softc *sc = ucom->sc_parent; 612 uint8_t pn = ucom->sc_portno; 613 uint8_t lcr = sc->sc_ports[pn].sc_lcr; 614 uint8_t mcr = sc->sc_ports[pn].sc_mcr; 615 616 DPRINTF("Port %d config:\n", pn); 617 if (t->c_cflag & CSTOPB) { 618 DPRINTF(" 2 stop bits\n"); 619 lcr |= MCS7840_UART_LCR_STOPB2; 620 } else { 621 lcr |= MCS7840_UART_LCR_STOPB1; 622 DPRINTF(" 1 stop bit\n"); 623 } 624 625 lcr &= ~MCS7840_UART_LCR_PARITYMASK; 626 if (t->c_cflag & PARENB) { 627 lcr |= MCS7840_UART_LCR_PARITYON; 628 if (t->c_cflag & PARODD) { 629 lcr = MCS7840_UART_LCR_PARITYODD; 630 DPRINTF(" parity on - odd\n"); 631 } else { 632 lcr = MCS7840_UART_LCR_PARITYEVEN; 633 DPRINTF(" parity on - even\n"); 634 } 635 } else { 636 lcr &= ~MCS7840_UART_LCR_PARITYON; 637 DPRINTF(" parity off\n"); 638 } 639 640 lcr &= ~MCS7840_UART_LCR_DATALENMASK; 641 switch (t->c_cflag & CSIZE) { 642 case CS5: 643 lcr |= MCS7840_UART_LCR_DATALEN5; 644 DPRINTF(" 5 bit\n"); 645 break; 646 case CS6: 647 lcr |= MCS7840_UART_LCR_DATALEN6; 648 DPRINTF(" 6 bit\n"); 649 break; 650 case CS7: 651 lcr |= MCS7840_UART_LCR_DATALEN7; 652 DPRINTF(" 7 bit\n"); 653 break; 654 case CS8: 655 lcr |= MCS7840_UART_LCR_DATALEN8; 656 DPRINTF(" 8 bit\n"); 657 break; 658 } 659 660 if (t->c_cflag & CRTSCTS) { 661 mcr |= MCS7840_UART_MCR_CTSRTS; 662 DPRINTF(" CTS/RTS\n"); 663 } else 664 mcr &= ~MCS7840_UART_MCR_CTSRTS; 665 666 if (t->c_cflag & (CDTR_IFLOW | CDSR_OFLOW)) { 667 mcr |= MCS7840_UART_MCR_DTRDSR; 668 DPRINTF(" DTR/DSR\n"); 669 } else 670 mcr &= ~MCS7840_UART_MCR_DTRDSR; 671 672 sc->sc_ports[pn].sc_lcr = lcr; 673 umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_lcr); 674 DPRINTF("Port %d LCR=%02x\n", pn, sc->sc_ports[pn].sc_lcr); 675 676 sc->sc_ports[pn].sc_mcr = mcr; 677 umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr); 678 DPRINTF("Port %d MCR=%02x\n", pn, sc->sc_ports[pn].sc_mcr); 679 680 umcs7840_set_baudrate(sc, pn, t->c_ospeed); 681 } 682 683 static int 684 umcs7840_pre_param(struct ucom_softc *ucom, struct termios *t) 685 { 686 uint8_t clk; 687 uint16_t divisor; 688 689 if (umcs7840_calc_baudrate(t->c_ospeed, &divisor, &clk) || !divisor) 690 return (EINVAL); 691 return (0); 692 } 693 694 static void 695 umcs7840_start_read(struct ucom_softc *ucom) 696 { 697 struct umcs7840_softc *sc = ucom->sc_parent; 698 uint8_t pn = ucom->sc_portno; 699 700 /* Start interrupt transfer */ 701 usbd_transfer_start(sc->sc_intr_xfer); 702 703 /* Start read transfer */ 704 usbd_transfer_start(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_RD_EP]); 705 } 706 707 static void 708 umcs7840_stop_read(struct ucom_softc *ucom) 709 { 710 struct umcs7840_softc *sc = ucom->sc_parent; 711 uint8_t pn = ucom->sc_portno; 712 713 /* Stop read transfer */ 714 usbd_transfer_stop(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_RD_EP]); 715 } 716 717 static void 718 umcs7840_start_write(struct ucom_softc *ucom) 719 { 720 struct umcs7840_softc *sc = ucom->sc_parent; 721 uint8_t pn = ucom->sc_portno; 722 723 /* Start interrupt transfer */ 724 usbd_transfer_start(sc->sc_intr_xfer); 725 726 /* Start write transfer */ 727 usbd_transfer_start(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_WR_EP]); 728 } 729 730 static void 731 umcs7840_stop_write(struct ucom_softc *ucom) 732 { 733 struct umcs7840_softc *sc = ucom->sc_parent; 734 uint8_t pn = ucom->sc_portno; 735 736 /* Stop write transfer */ 737 usbd_transfer_stop(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_WR_EP]); 738 } 739 740 static void 741 umcs7840_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) 742 { 743 struct umcs7840_softc *sc = ucom->sc_parent; 744 uint8_t pn = ucom->sc_portno; 745 uint8_t hw_msr = 0; /* local modem status register */ 746 747 /* 748 * Read status registers. MSR bits need translation from ns16550 to 749 * SER_* values. LSR bits are ns16550 in hardware and ucom. 750 */ 751 umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_LSR, lsr); 752 umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); 753 754 if (hw_msr & MCS7840_UART_MSR_NEGCTS) 755 *msr |= SER_CTS; 756 757 if (hw_msr & MCS7840_UART_MSR_NEGDCD) 758 *msr |= SER_DCD; 759 760 if (hw_msr & MCS7840_UART_MSR_NEGRI) 761 *msr |= SER_RI; 762 763 if (hw_msr & MCS7840_UART_MSR_NEGDSR) 764 *msr |= SER_DSR; 765 766 DPRINTF("Port %d status: LSR=%02x MSR=%02x\n", ucom->sc_portno, *lsr, *msr); 767 } 768 769 static void 770 umcs7840_intr_callback(struct usb_xfer *xfer, usb_error_t error) 771 { 772 struct umcs7840_softc *sc = usbd_xfer_softc(xfer); 773 struct usb_page_cache *pc; 774 uint8_t buf[13]; 775 int actlen; 776 int subunit; 777 778 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 779 780 switch (USB_GET_STATE(xfer)) { 781 case USB_ST_TRANSFERRED: 782 if (actlen == 5 || actlen == 13) { 783 pc = usbd_xfer_get_frame(xfer, 0); 784 usbd_copy_out(pc, 0, buf, actlen); 785 /* Check status of all ports */ 786 for (subunit = 0; subunit < sc->sc_numports; ++subunit) { 787 uint8_t pn = sc->sc_ucom[subunit].sc_portno; 788 789 if (buf[pn] & MCS7840_UART_ISR_NOPENDING) 790 continue; 791 DPRINTF("Port %d has pending interrupt: %02x (FIFO: %02x)\n", pn, buf[pn] & MCS7840_UART_ISR_INTMASK, buf[pn] & (~MCS7840_UART_ISR_INTMASK)); 792 switch (buf[pn] & MCS7840_UART_ISR_INTMASK) { 793 case MCS7840_UART_ISR_RXERR: 794 case MCS7840_UART_ISR_RXHASDATA: 795 case MCS7840_UART_ISR_RXTIMEOUT: 796 case MCS7840_UART_ISR_MSCHANGE: 797 ucom_status_change(&sc->sc_ucom[subunit]); 798 break; 799 default: 800 /* Do nothing */ 801 break; 802 } 803 } 804 } else 805 device_printf(sc->sc_dev, "Invalid interrupt data length %d", actlen); 806 /* FALLTHROUGH */ 807 case USB_ST_SETUP: 808 tr_setup: 809 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 810 usbd_transfer_submit(xfer); 811 return; 812 813 default: /* Error */ 814 if (error != USB_ERR_CANCELLED) { 815 /* try to clear stall first */ 816 usbd_xfer_set_stall(xfer); 817 goto tr_setup; 818 } 819 return; 820 } 821 } 822 823 static void 824 umcs7840_read_callback1(struct usb_xfer *xfer, usb_error_t error) 825 { 826 umcs7840_read_callbackN(xfer, error, 0); 827 } 828 829 static void 830 umcs7840_read_callback2(struct usb_xfer *xfer, usb_error_t error) 831 { 832 umcs7840_read_callbackN(xfer, error, 1); 833 } 834 static void 835 umcs7840_read_callback3(struct usb_xfer *xfer, usb_error_t error) 836 { 837 umcs7840_read_callbackN(xfer, error, 2); 838 } 839 840 static void 841 umcs7840_read_callback4(struct usb_xfer *xfer, usb_error_t error) 842 { 843 umcs7840_read_callbackN(xfer, error, 3); 844 } 845 846 static void 847 umcs7840_read_callbackN(struct usb_xfer *xfer, usb_error_t error, uint8_t subunit) 848 { 849 struct umcs7840_softc *sc = usbd_xfer_softc(xfer); 850 struct ucom_softc *ucom = &sc->sc_ucom[subunit]; 851 struct usb_page_cache *pc; 852 int actlen; 853 854 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 855 856 DPRINTF("Port %d read, state = %d, data length = %d\n", ucom->sc_portno, USB_GET_STATE(xfer), actlen); 857 858 switch (USB_GET_STATE(xfer)) { 859 case USB_ST_TRANSFERRED: 860 pc = usbd_xfer_get_frame(xfer, 0); 861 ucom_put_data(ucom, pc, 0, actlen); 862 /* FALLTHROUGH */ 863 case USB_ST_SETUP: 864 tr_setup: 865 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 866 usbd_transfer_submit(xfer); 867 return; 868 869 default: /* Error */ 870 if (error != USB_ERR_CANCELLED) { 871 /* try to clear stall first */ 872 usbd_xfer_set_stall(xfer); 873 goto tr_setup; 874 } 875 return; 876 } 877 } 878 879 static void 880 umcs7840_write_callback1(struct usb_xfer *xfer, usb_error_t error) 881 { 882 umcs7840_write_callbackN(xfer, error, 0); 883 } 884 885 static void 886 umcs7840_write_callback2(struct usb_xfer *xfer, usb_error_t error) 887 { 888 umcs7840_write_callbackN(xfer, error, 1); 889 } 890 891 static void 892 umcs7840_write_callback3(struct usb_xfer *xfer, usb_error_t error) 893 { 894 umcs7840_write_callbackN(xfer, error, 2); 895 } 896 897 static void 898 umcs7840_write_callback4(struct usb_xfer *xfer, usb_error_t error) 899 { 900 umcs7840_write_callbackN(xfer, error, 3); 901 } 902 903 static void 904 umcs7840_write_callbackN(struct usb_xfer *xfer, usb_error_t error, uint8_t subunit) 905 { 906 struct umcs7840_softc *sc = usbd_xfer_softc(xfer); 907 struct ucom_softc *ucom = &sc->sc_ucom[subunit]; 908 struct usb_page_cache *pc; 909 uint32_t actlen; 910 911 DPRINTF("Port %d write, state = %d\n", ucom->sc_portno, USB_GET_STATE(xfer)); 912 913 switch (USB_GET_STATE(xfer)) { 914 case USB_ST_SETUP: 915 case USB_ST_TRANSFERRED: 916 tr_setup: 917 pc = usbd_xfer_get_frame(xfer, 0); 918 if (ucom_get_data(ucom, pc, 0, usbd_xfer_max_len(xfer), &actlen)) { 919 DPRINTF("Port %d write, has %d bytes\n", ucom->sc_portno, actlen); 920 usbd_xfer_set_frame_len(xfer, 0, actlen); 921 usbd_transfer_submit(xfer); 922 } 923 return; 924 925 default: /* Error */ 926 if (error != USB_ERR_CANCELLED) { 927 /* try to clear stall first */ 928 usbd_xfer_set_stall(xfer); 929 goto tr_setup; 930 } 931 return; 932 } 933 } 934 935 static void 936 umcs7840_poll(struct ucom_softc *ucom) 937 { 938 struct umcs7840_softc *sc = ucom->sc_parent; 939 940 DPRINTF("Port %d poll\n", ucom->sc_portno); 941 usbd_transfer_poll(sc->sc_ports[ucom->sc_portno].sc_xfer, UMCS7840_N_TRANSFERS); 942 usbd_transfer_poll(&sc->sc_intr_xfer, 1); 943 } 944 945 static usb_error_t 946 umcs7840_get_reg_sync(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data) 947 { 948 struct usb_device_request req; 949 usb_error_t err; 950 uint16_t len; 951 952 req.bmRequestType = UT_READ_VENDOR_DEVICE; 953 req.bRequest = MCS7840_RDREQ; 954 USETW(req.wValue, 0); 955 USETW(req.wIndex, reg); 956 USETW(req.wLength, UMCS7840_READ_LENGTH); 957 958 err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, (void *)data, 0, &len, UMCS7840_CTRL_TIMEOUT); 959 if (err == USB_ERR_NORMAL_COMPLETION && len != 1) { 960 device_printf(sc->sc_dev, "Reading register %d failed: invalid length %d\n", reg, len); 961 return (USB_ERR_INVAL); 962 } else if (err) 963 device_printf(sc->sc_dev, "Reading register %d failed: %s\n", reg, usbd_errstr(err)); 964 return (err); 965 } 966 967 static usb_error_t 968 umcs7840_set_reg_sync(struct umcs7840_softc *sc, uint8_t reg, uint8_t data) 969 { 970 struct usb_device_request req; 971 usb_error_t err; 972 973 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 974 req.bRequest = MCS7840_WRREQ; 975 USETW(req.wValue, data); 976 USETW(req.wIndex, reg); 977 USETW(req.wLength, 0); 978 979 err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, NULL, 0, NULL, UMCS7840_CTRL_TIMEOUT); 980 if (err) 981 device_printf(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err)); 982 983 return (err); 984 } 985 986 static usb_error_t 987 umcs7840_get_UART_reg_sync(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t *data) 988 { 989 struct usb_device_request req; 990 uint16_t wVal; 991 usb_error_t err; 992 uint16_t len; 993 994 /* portno is port number */ 995 wVal = ((uint16_t)(portno + 1)) << 8; 996 997 req.bmRequestType = UT_READ_VENDOR_DEVICE; 998 req.bRequest = MCS7840_RDREQ; 999 USETW(req.wValue, wVal); 1000 USETW(req.wIndex, reg); 1001 USETW(req.wLength, UMCS7840_READ_LENGTH); 1002 1003 err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, (void *)data, 0, &len, UMCS7840_CTRL_TIMEOUT); 1004 if (err == USB_ERR_NORMAL_COMPLETION && len != 1) { 1005 device_printf(sc->sc_dev, "Reading UART%d register %d failed: invalid length %d\n", portno, reg, len); 1006 return (USB_ERR_INVAL); 1007 } else if (err) 1008 device_printf(sc->sc_dev, "Reading UART%d register %d failed: %s\n", portno, reg, usbd_errstr(err)); 1009 return (err); 1010 } 1011 1012 static usb_error_t 1013 umcs7840_set_UART_reg_sync(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data) 1014 { 1015 struct usb_device_request req; 1016 usb_error_t err; 1017 uint16_t wVal; 1018 1019 /* portno is port number */ 1020 wVal = ((uint16_t)(portno + 1)) << 8 | data; 1021 1022 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 1023 req.bRequest = MCS7840_WRREQ; 1024 USETW(req.wValue, wVal); 1025 USETW(req.wIndex, reg); 1026 USETW(req.wLength, 0); 1027 1028 err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, NULL, 0, NULL, UMCS7840_CTRL_TIMEOUT); 1029 if (err) 1030 device_printf(sc->sc_dev, "Writing UART%d register %d failed: %s\n", portno, reg, usbd_errstr(err)); 1031 return (err); 1032 } 1033 1034 static usb_error_t 1035 umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, uint32_t rate) 1036 { 1037 usb_error_t err; 1038 uint16_t divisor; 1039 uint8_t clk; 1040 uint8_t data; 1041 1042 if (umcs7840_calc_baudrate(rate, &divisor, &clk)) { 1043 DPRINTF("Port %d bad speed: %d\n", portno, rate); 1044 return (-1); 1045 } 1046 if (divisor == 0 || (clk & MCS7840_DEV_SPx_CLOCK_MASK) != clk) { 1047 DPRINTF("Port %d bad speed calculation: %d\n", portno, rate); 1048 return (-1); 1049 } 1050 DPRINTF("Port %d set speed: %d (%02x / %d)\n", portno, rate, clk, divisor); 1051 1052 /* Set clock source for standard BAUD frequences */ 1053 err = umcs7840_get_reg_sync(sc, umcs7840_port_registers[portno].reg_sp, &data); 1054 if (err) 1055 return (err); 1056 data &= MCS7840_DEV_SPx_CLOCK_MASK; 1057 data |= clk; 1058 err = umcs7840_set_reg_sync(sc, umcs7840_port_registers[portno].reg_sp, data); 1059 if (err) 1060 return (err); 1061 1062 /* Set divider */ 1063 sc->sc_ports[portno].sc_lcr |= MCS7840_UART_LCR_DIVISORS; 1064 err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_lcr); 1065 if (err) 1066 return (err); 1067 1068 err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff)); 1069 if (err) 1070 return (err); 1071 err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_DLM, (uint8_t)((divisor >> 8) & 0xff)); 1072 if (err) 1073 return (err); 1074 1075 /* Turn off access to DLL/DLM registers of UART */ 1076 sc->sc_ports[portno].sc_lcr &= ~MCS7840_UART_LCR_DIVISORS; 1077 err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_lcr); 1078 if (err) 1079 return (err); 1080 return (0); 1081 } 1082 1083 /* Maximum speeds for standard frequences, when PLL is not used */ 1084 static const uint32_t umcs7840_baudrate_divisors[] = {0, 115200, 230400, 403200, 460800, 806400, 921600, 1572864, 3145728,}; 1085 static const uint8_t umcs7840_baudrate_divisors_len = nitems(umcs7840_baudrate_divisors); 1086 1087 static usb_error_t 1088 umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk) 1089 { 1090 uint8_t i = 0; 1091 1092 if (rate > umcs7840_baudrate_divisors[umcs7840_baudrate_divisors_len - 1]) 1093 return (-1); 1094 1095 for (i = 0; i < umcs7840_baudrate_divisors_len - 1 && 1096 !(rate > umcs7840_baudrate_divisors[i] && rate <= umcs7840_baudrate_divisors[i + 1]); ++i); 1097 if (rate == 0) 1098 *divisor = 1; /* XXX */ 1099 else 1100 *divisor = umcs7840_baudrate_divisors[i + 1] / rate; 1101 /* 0x00 .. 0x70 */ 1102 *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; 1103 return (0); 1104 } 1105