sys/dev/usb/serial/umoscom.c

   1 /* $FreeBSD$ */
   2 /*      $OpenBSD: umoscom.c,v 1.2 2006/10/26 06:02:43 jsg Exp $ */
   3
   4 /*
   5  * Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org>
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #include <sys/stdint.h>
  21 #include <sys/stddef.h>
  22 #include <sys/param.h>
  23 #include <sys/queue.h>
  24 #include <sys/types.h>
  25 #include <sys/systm.h>
  26 #include <sys/kernel.h>
  27 #include <sys/bus.h>
  28 #include <sys/module.h>
  29 #include <sys/lock.h>
  30 #include <sys/mutex.h>
  31 #include <sys/condvar.h>
  32 #include <sys/sysctl.h>
  33 #include <sys/sx.h>
  34 #include <sys/unistd.h>
  35 #include <sys/callout.h>
  36 #include <sys/malloc.h>
  37 #include <sys/priv.h>
  38
  39 #include <dev/usb/usb.h>
  40 #include <dev/usb/usbdi.h>
  41 #include <dev/usb/usbdi_util.h>
  42 #include "usbdevs.h"
  43
  44 #define USB_DEBUG_VAR umoscom_debug
  45 #include <dev/usb/usb_debug.h>
  46 #include <dev/usb/usb_process.h>
  47
  48 #include <dev/usb/serial/usb_serial.h>
  49
  50 #ifdef USB_DEBUG
  51 static int umoscom_debug = 0;
  52
  53 static SYSCTL_NODE(_hw_usb, OID_AUTO, umoscom, CTLFLAG_RW, 0, "USB umoscom");
  54 SYSCTL_INT(_hw_usb_umoscom, OID_AUTO, debug, CTLFLAG_RWTUN,
  55     &umoscom_debug, 0, "Debug level");
  56 #endif
  57
  58 #define UMOSCOM_BUFSIZE        1024     /* bytes */
  59
  60 #define UMOSCOM_CONFIG_INDEX    0
  61 #define UMOSCOM_IFACE_INDEX     0
  62
  63 /* interrupt packet */
  64 #define UMOSCOM_IIR_RLS         0x06
  65 #define UMOSCOM_IIR_RDA         0x04
  66 #define UMOSCOM_IIR_CTI         0x0c
  67 #define UMOSCOM_IIR_THR         0x02
  68 #define UMOSCOM_IIR_MS          0x00
  69
  70 /* registers */
  71 #define UMOSCOM_READ            0x0d
  72 #define UMOSCOM_WRITE           0x0e
  73 #define UMOSCOM_UART_REG        0x0300
  74 #define UMOSCOM_VEND_REG        0x0000
  75
  76 #define UMOSCOM_TXBUF           0x00    /* Write */
  77 #define UMOSCOM_RXBUF           0x00    /* Read */
  78 #define UMOSCOM_INT             0x01
  79 #define UMOSCOM_FIFO            0x02    /* Write */
  80 #define UMOSCOM_ISR             0x02    /* Read */
  81 #define UMOSCOM_LCR             0x03
  82 #define UMOSCOM_MCR             0x04
  83 #define UMOSCOM_LSR             0x05
  84 #define UMOSCOM_MSR             0x06
  85 #define UMOSCOM_SCRATCH         0x07
  86 #define UMOSCOM_DIV_LO          0x08
  87 #define UMOSCOM_DIV_HI          0x09
  88 #define UMOSCOM_EFR             0x0a
  89 #define UMOSCOM_XON1            0x0b
  90 #define UMOSCOM_XON2            0x0c
  91 #define UMOSCOM_XOFF1           0x0d
  92 #define UMOSCOM_XOFF2           0x0e
  93
  94 #define UMOSCOM_BAUDLO          0x00
  95 #define UMOSCOM_BAUDHI          0x01
  96
  97 #define UMOSCOM_INT_RXEN        0x01
  98 #define UMOSCOM_INT_TXEN        0x02
  99 #define UMOSCOM_INT_RSEN        0x04
 100 #define UMOSCOM_INT_MDMEM       0x08
 101 #define UMOSCOM_INT_SLEEP       0x10
 102 #define UMOSCOM_INT_XOFF        0x20
 103 #define UMOSCOM_INT_RTS         0x40
 104
 105 #define UMOSCOM_FIFO_EN         0x01
 106 #define UMOSCOM_FIFO_RXCLR      0x02
 107 #define UMOSCOM_FIFO_TXCLR      0x04
 108 #define UMOSCOM_FIFO_DMA_BLK    0x08
 109 #define UMOSCOM_FIFO_TXLVL_MASK 0x30
 110 #define UMOSCOM_FIFO_TXLVL_8    0x00
 111 #define UMOSCOM_FIFO_TXLVL_16   0x10
 112 #define UMOSCOM_FIFO_TXLVL_32   0x20
 113 #define UMOSCOM_FIFO_TXLVL_56   0x30
 114 #define UMOSCOM_FIFO_RXLVL_MASK 0xc0
 115 #define UMOSCOM_FIFO_RXLVL_8    0x00
 116 #define UMOSCOM_FIFO_RXLVL_16   0x40
 117 #define UMOSCOM_FIFO_RXLVL_56   0x80
 118 #define UMOSCOM_FIFO_RXLVL_80   0xc0
 119
 120 #define UMOSCOM_ISR_MDM         0x00
 121 #define UMOSCOM_ISR_NONE        0x01
 122 #define UMOSCOM_ISR_TX          0x02
 123 #define UMOSCOM_ISR_RX          0x04
 124 #define UMOSCOM_ISR_LINE        0x06
 125 #define UMOSCOM_ISR_RXTIMEOUT   0x0c
 126 #define UMOSCOM_ISR_RX_XOFF     0x10
 127 #define UMOSCOM_ISR_RTSCTS      0x20
 128 #define UMOSCOM_ISR_FIFOEN      0xc0
 129
 130 #define UMOSCOM_LCR_DBITS(x)    ((x) - 5)
 131 #define UMOSCOM_LCR_STOP_BITS_1 0x00
 132 #define UMOSCOM_LCR_STOP_BITS_2 0x04    /* 2 if 6-8 bits/char or 1.5 if 5 */
 133 #define UMOSCOM_LCR_PARITY_NONE 0x00
 134 #define UMOSCOM_LCR_PARITY_ODD  0x08
 135 #define UMOSCOM_LCR_PARITY_EVEN 0x18
 136 #define UMOSCOM_LCR_BREAK       0x40
 137 #define UMOSCOM_LCR_DIVLATCH_EN 0x80
 138
 139 #define UMOSCOM_MCR_DTR         0x01
 140 #define UMOSCOM_MCR_RTS         0x02
 141 #define UMOSCOM_MCR_LOOP        0x04
 142 #define UMOSCOM_MCR_INTEN       0x08
 143 #define UMOSCOM_MCR_LOOPBACK    0x10
 144 #define UMOSCOM_MCR_XONANY      0x20
 145 #define UMOSCOM_MCR_IRDA_EN     0x40
 146 #define UMOSCOM_MCR_BAUD_DIV4   0x80
 147
 148 #define UMOSCOM_LSR_RXDATA      0x01
 149 #define UMOSCOM_LSR_RXOVER      0x02
 150 #define UMOSCOM_LSR_RXPAR_ERR   0x04
 151 #define UMOSCOM_LSR_RXFRM_ERR   0x08
 152 #define UMOSCOM_LSR_RXBREAK     0x10
 153 #define UMOSCOM_LSR_TXEMPTY     0x20
 154 #define UMOSCOM_LSR_TXALLEMPTY  0x40
 155 #define UMOSCOM_LSR_TXFIFO_ERR  0x80
 156
 157 #define UMOSCOM_MSR_CTS_CHG     0x01
 158 #define UMOSCOM_MSR_DSR_CHG     0x02
 159 #define UMOSCOM_MSR_RI_CHG      0x04
 160 #define UMOSCOM_MSR_CD_CHG      0x08
 161 #define UMOSCOM_MSR_CTS         0x10
 162 #define UMOSCOM_MSR_RTS         0x20
 163 #define UMOSCOM_MSR_RI          0x40
 164 #define UMOSCOM_MSR_CD          0x80
 165
 166 #define UMOSCOM_BAUD_REF        115200
 167
 168 enum {
 169         UMOSCOM_BULK_DT_WR,
 170         UMOSCOM_BULK_DT_RD,
 171         UMOSCOM_INTR_DT_RD,
 172         UMOSCOM_N_TRANSFER,
 173 };
 174
 175 struct umoscom_softc {
 176         struct ucom_super_softc sc_super_ucom;
 177         struct ucom_softc sc_ucom;
 178
 179         struct usb_xfer *sc_xfer[UMOSCOM_N_TRANSFER];
 180         struct usb_device *sc_udev;
 181         struct mtx sc_mtx;
 182
 183         uint8_t sc_mcr;
 184         uint8_t sc_lcr;
 185 };
 186
 187 /* prototypes */
 188
 189 static device_probe_t umoscom_probe;
 190 static device_attach_t umoscom_attach;
 191 static device_detach_t umoscom_detach;
 192 static void umoscom_free_softc(struct umoscom_softc *);
 193
 194 static usb_callback_t umoscom_write_callback;
 195 static usb_callback_t umoscom_read_callback;
 196 static usb_callback_t umoscom_intr_callback;
 197
 198 static void     umoscom_free(struct ucom_softc *);
 199 static void     umoscom_cfg_open(struct ucom_softc *);
 200 static void     umoscom_cfg_close(struct ucom_softc *);
 201 static void     umoscom_cfg_set_break(struct ucom_softc *, uint8_t);
 202 static void     umoscom_cfg_set_dtr(struct ucom_softc *, uint8_t);
 203 static void     umoscom_cfg_set_rts(struct ucom_softc *, uint8_t);
 204 static int      umoscom_pre_param(struct ucom_softc *, struct termios *);
 205 static void     umoscom_cfg_param(struct ucom_softc *, struct termios *);
 206 static void     umoscom_cfg_get_status(struct ucom_softc *, uint8_t *,
 207                     uint8_t *);
 208 static void     umoscom_cfg_write(struct umoscom_softc *, uint16_t, uint16_t);
 209 static uint8_t  umoscom_cfg_read(struct umoscom_softc *, uint16_t);
 210 static void     umoscom_start_read(struct ucom_softc *);
 211 static void     umoscom_stop_read(struct ucom_softc *);
 212 static void     umoscom_start_write(struct ucom_softc *);
 213 static void     umoscom_stop_write(struct ucom_softc *);
 214 static void     umoscom_poll(struct ucom_softc *ucom);
 215
 216 static const struct usb_config umoscom_config_data[UMOSCOM_N_TRANSFER] = {
 217
 218         [UMOSCOM_BULK_DT_WR] = {
 219                 .type = UE_BULK,
 220                 .endpoint = UE_ADDR_ANY,
 221                 .direction = UE_DIR_OUT,
 222                 .bufsize = UMOSCOM_BUFSIZE,
 223                 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
 224                 .callback = &umoscom_write_callback,
 225         },
 226
 227         [UMOSCOM_BULK_DT_RD] = {
 228                 .type = UE_BULK,
 229                 .endpoint = UE_ADDR_ANY,
 230                 .direction = UE_DIR_IN,
 231                 .bufsize = UMOSCOM_BUFSIZE,
 232                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 233                 .callback = &umoscom_read_callback,
 234         },
 235
 236         [UMOSCOM_INTR_DT_RD] = {
 237                 .type = UE_INTERRUPT,
 238                 .endpoint = UE_ADDR_ANY,
 239                 .direction = UE_DIR_IN,
 240                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 241                 .bufsize = 0,   /* use wMaxPacketSize */
 242                 .callback = &umoscom_intr_callback,
 243         },
 244 };
 245
 246 static const struct ucom_callback umoscom_callback = {
 247         /* configuration callbacks */
 248         .ucom_cfg_get_status = &umoscom_cfg_get_status,
 249         .ucom_cfg_set_dtr = &umoscom_cfg_set_dtr,
 250         .ucom_cfg_set_rts = &umoscom_cfg_set_rts,
 251         .ucom_cfg_set_break = &umoscom_cfg_set_break,
 252         .ucom_cfg_param = &umoscom_cfg_param,
 253         .ucom_cfg_open = &umoscom_cfg_open,
 254         .ucom_cfg_close = &umoscom_cfg_close,
 255
 256         /* other callbacks */
 257         .ucom_pre_param = &umoscom_pre_param,
 258         .ucom_start_read = &umoscom_start_read,
 259         .ucom_stop_read = &umoscom_stop_read,
 260         .ucom_start_write = &umoscom_start_write,
 261         .ucom_stop_write = &umoscom_stop_write,
 262         .ucom_poll = &umoscom_poll,
 263         .ucom_free = &umoscom_free,
 264 };
 265
 266 static device_method_t umoscom_methods[] = {
 267         DEVMETHOD(device_probe, umoscom_probe),
 268         DEVMETHOD(device_attach, umoscom_attach),
 269         DEVMETHOD(device_detach, umoscom_detach),
 270         DEVMETHOD_END
 271 };
 272
 273 static devclass_t umoscom_devclass;
 274
 275 static driver_t umoscom_driver = {
 276         .name = "umoscom",
 277         .methods = umoscom_methods,
 278         .size = sizeof(struct umoscom_softc),
 279 };
 280
 281 static const STRUCT_USB_HOST_ID umoscom_devs[] = {
 282         {USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703, 0)}
 283 };
 284
 285 DRIVER_MODULE(umoscom, uhub, umoscom_driver, umoscom_devclass, NULL, 0);
 286 MODULE_DEPEND(umoscom, ucom, 1, 1, 1);
 287 MODULE_DEPEND(umoscom, usb, 1, 1, 1);
 288 MODULE_VERSION(umoscom, 1);
 289 USB_PNP_HOST_INFO(umoscom_devs);
 290
 291 static int
 292 umoscom_probe(device_t dev)
 293 {
 294         struct usb_attach_arg *uaa = device_get_ivars(dev);
 295
 296         if (uaa->usb_mode != USB_MODE_HOST) {
 297                 return (ENXIO);
 298         }
 299         if (uaa->info.bConfigIndex != UMOSCOM_CONFIG_INDEX) {
 300                 return (ENXIO);
 301         }
 302         if (uaa->info.bIfaceIndex != UMOSCOM_IFACE_INDEX) {
 303                 return (ENXIO);
 304         }
 305         return (usbd_lookup_id_by_uaa(umoscom_devs, sizeof(umoscom_devs), uaa));
 306 }
 307
 308 static int
 309 umoscom_attach(device_t dev)
 310 {
 311         struct usb_attach_arg *uaa = device_get_ivars(dev);
 312         struct umoscom_softc *sc = device_get_softc(dev);
 313         int error;
 314         uint8_t iface_index;
 315
 316         sc->sc_udev = uaa->device;
 317         sc->sc_mcr = 0x08;              /* enable interrupts */
 318
 319         /* XXX the device doesn't provide any ID string, so set a static one */
 320         device_set_desc(dev, "MOSCHIP USB Serial Port Adapter");
 321         device_printf(dev, "<MOSCHIP USB Serial Port Adapter>\n");
 322
 323         mtx_init(&sc->sc_mtx, "umoscom", NULL, MTX_DEF);
 324         ucom_ref(&sc->sc_super_ucom);
 325
 326         iface_index = UMOSCOM_IFACE_INDEX;
 327         error = usbd_transfer_setup(uaa->device, &iface_index,
 328             sc->sc_xfer, umoscom_config_data,
 329             UMOSCOM_N_TRANSFER, sc, &sc->sc_mtx);
 330
 331         if (error) {
 332                 goto detach;
 333         }
 334         /* clear stall at first run */
 335         mtx_lock(&sc->sc_mtx);
 336         usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 337         usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 338         mtx_unlock(&sc->sc_mtx);
 339
 340         error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
 341             &umoscom_callback, &sc->sc_mtx);
 342         if (error) {
 343                 goto detach;
 344         }
 345         ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
 346
 347         return (0);
 348
 349 detach:
 350         device_printf(dev, "attach error: %s\n", usbd_errstr(error));
 351         umoscom_detach(dev);
 352         return (ENXIO);
 353 }
 354
 355 static int
 356 umoscom_detach(device_t dev)
 357 {
 358         struct umoscom_softc *sc = device_get_softc(dev);
 359
 360         ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
 361         usbd_transfer_unsetup(sc->sc_xfer, UMOSCOM_N_TRANSFER);
 362
 363         device_claim_softc(dev);
 364
 365         umoscom_free_softc(sc);
 366
 367         return (0);
 368 }
 369
 370 UCOM_UNLOAD_DRAIN(umoscom);
 371
 372 static void
 373 umoscom_free_softc(struct umoscom_softc *sc)
 374 {
 375         if (ucom_unref(&sc->sc_super_ucom)) {
 376                 mtx_destroy(&sc->sc_mtx);
 377                 device_free_softc(sc);
 378         }
 379 }
 380
 381 static void
 382 umoscom_free(struct ucom_softc *ucom)
 383 {
 384         umoscom_free_softc(ucom->sc_parent);
 385 }
 386
 387 static void
 388 umoscom_cfg_open(struct ucom_softc *ucom)
 389 {
 390         struct umoscom_softc *sc = ucom->sc_parent;
 391
 392         DPRINTF("\n");
 393
 394         /* Purge FIFOs or odd things happen */
 395         umoscom_cfg_write(sc, UMOSCOM_FIFO, 0x00 | UMOSCOM_UART_REG);
 396
 397         /* Enable FIFO */
 398         umoscom_cfg_write(sc, UMOSCOM_FIFO, UMOSCOM_FIFO_EN |
 399             UMOSCOM_FIFO_RXCLR | UMOSCOM_FIFO_TXCLR |
 400             UMOSCOM_FIFO_DMA_BLK | UMOSCOM_FIFO_RXLVL_MASK |
 401             UMOSCOM_UART_REG);
 402
 403         /* Enable Interrupt Registers */
 404         umoscom_cfg_write(sc, UMOSCOM_INT, 0x0C | UMOSCOM_UART_REG);
 405
 406         /* Magic */
 407         umoscom_cfg_write(sc, 0x01, 0x08);
 408
 409         /* Magic */
 410         umoscom_cfg_write(sc, 0x00, 0x02);
 411 }
 412
 413 static void
 414 umoscom_cfg_close(struct ucom_softc *ucom)
 415 {
 416         return;
 417 }
 418
 419 static void
 420 umoscom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
 421 {
 422         struct umoscom_softc *sc = ucom->sc_parent;
 423         uint16_t val;
 424
 425         val = sc->sc_lcr;
 426         if (onoff)
 427                 val |= UMOSCOM_LCR_BREAK;
 428
 429         umoscom_cfg_write(sc, UMOSCOM_LCR, val | UMOSCOM_UART_REG);
 430 }
 431
 432 static void
 433 umoscom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
 434 {
 435         struct umoscom_softc *sc = ucom->sc_parent;
 436
 437         if (onoff)
 438                 sc->sc_mcr |= UMOSCOM_MCR_DTR;
 439         else
 440                 sc->sc_mcr &= ~UMOSCOM_MCR_DTR;
 441
 442         umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
 443 }
 444
 445 static void
 446 umoscom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
 447 {
 448         struct umoscom_softc *sc = ucom->sc_parent;
 449
 450         if (onoff)
 451                 sc->sc_mcr |= UMOSCOM_MCR_RTS;
 452         else
 453                 sc->sc_mcr &= ~UMOSCOM_MCR_RTS;
 454
 455         umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
 456 }
 457
 458 static int
 459 umoscom_pre_param(struct ucom_softc *ucom, struct termios *t)
 460 {
 461         if ((t->c_ospeed <= 1) || (t->c_ospeed > 115200))
 462                 return (EINVAL);
 463
 464         return (0);
 465 }
 466
 467 static void
 468 umoscom_cfg_param(struct ucom_softc *ucom, struct termios *t)
 469 {
 470         struct umoscom_softc *sc = ucom->sc_parent;
 471         uint16_t data;
 472
 473         DPRINTF("speed=%d\n", t->c_ospeed);
 474
 475         data = ((uint32_t)UMOSCOM_BAUD_REF) / ((uint32_t)t->c_ospeed);
 476
 477         if (data == 0) {
 478                 DPRINTF("invalid baud rate!\n");
 479                 return;
 480         }
 481         umoscom_cfg_write(sc, UMOSCOM_LCR,
 482             UMOSCOM_LCR_DIVLATCH_EN | UMOSCOM_UART_REG);
 483
 484         umoscom_cfg_write(sc, UMOSCOM_BAUDLO,
 485             (data & 0xFF) | UMOSCOM_UART_REG);
 486
 487         umoscom_cfg_write(sc, UMOSCOM_BAUDHI,
 488             ((data >> 8) & 0xFF) | UMOSCOM_UART_REG);
 489
 490         if (t->c_cflag & CSTOPB)
 491                 data = UMOSCOM_LCR_STOP_BITS_2;
 492         else
 493                 data = UMOSCOM_LCR_STOP_BITS_1;
 494
 495         if (t->c_cflag & PARENB) {
 496                 if (t->c_cflag & PARODD)
 497                         data |= UMOSCOM_LCR_PARITY_ODD;
 498                 else
 499                         data |= UMOSCOM_LCR_PARITY_EVEN;
 500         } else
 501                 data |= UMOSCOM_LCR_PARITY_NONE;
 502
 503         switch (t->c_cflag & CSIZE) {
 504         case CS5:
 505                 data |= UMOSCOM_LCR_DBITS(5);
 506                 break;
 507         case CS6:
 508                 data |= UMOSCOM_LCR_DBITS(6);
 509                 break;
 510         case CS7:
 511                 data |= UMOSCOM_LCR_DBITS(7);
 512                 break;
 513         case CS8:
 514                 data |= UMOSCOM_LCR_DBITS(8);
 515                 break;
 516         }
 517
 518         sc->sc_lcr = data;
 519         umoscom_cfg_write(sc, UMOSCOM_LCR, data | UMOSCOM_UART_REG);
 520 }
 521
 522 static void
 523 umoscom_cfg_get_status(struct ucom_softc *ucom, uint8_t *p_lsr, uint8_t *p_msr)
 524 {
 525         struct umoscom_softc *sc = ucom->sc_parent;
 526         uint8_t msr;
 527
 528         DPRINTFN(5, "\n");
 529
 530         /*
 531          * Read status registers.  MSR bits need translation from ns16550 to
 532          * SER_* values.  LSR bits are ns16550 in hardware and ucom.
 533          */
 534
 535         *p_lsr = umoscom_cfg_read(sc, UMOSCOM_LSR);
 536         msr = umoscom_cfg_read(sc, UMOSCOM_MSR);
 537
 538         /* translate bits */
 539
 540         if (msr & UMOSCOM_MSR_CTS)
 541                 *p_msr |= SER_CTS;
 542
 543         if (msr & UMOSCOM_MSR_CD)
 544                 *p_msr |= SER_DCD;
 545
 546         if (msr & UMOSCOM_MSR_RI)
 547                 *p_msr |= SER_RI;
 548
 549         if (msr & UMOSCOM_MSR_RTS)
 550                 *p_msr |= SER_DSR;
 551 }
 552
 553 static void
 554 umoscom_cfg_write(struct umoscom_softc *sc, uint16_t reg, uint16_t val)
 555 {
 556         struct usb_device_request req;
 557
 558         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 559         req.bRequest = UMOSCOM_WRITE;
 560         USETW(req.wValue, val);
 561         USETW(req.wIndex, reg);
 562         USETW(req.wLength, 0);
 563
 564         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 565             &req, NULL, 0, 1000);
 566 }
 567
 568 static uint8_t
 569 umoscom_cfg_read(struct umoscom_softc *sc, uint16_t reg)
 570 {
 571         struct usb_device_request req;
 572         uint8_t val;
 573
 574         req.bmRequestType = UT_READ_VENDOR_DEVICE;
 575         req.bRequest = UMOSCOM_READ;
 576         USETW(req.wValue, 0);
 577         USETW(req.wIndex, reg);
 578         USETW(req.wLength, 1);
 579
 580         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 581             &req, &val, 0, 1000);
 582
 583         DPRINTF("reg=0x%04x, val=0x%02x\n", reg, val);
 584
 585         return (val);
 586 }
 587
 588 static void
 589 umoscom_start_read(struct ucom_softc *ucom)
 590 {
 591         struct umoscom_softc *sc = ucom->sc_parent;
 592
 593 #if 0
 594         /* start interrupt endpoint */
 595         usbd_transfer_start(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
 596 #endif
 597         /* start read endpoint */
 598         usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 599 }
 600
 601 static void
 602 umoscom_stop_read(struct ucom_softc *ucom)
 603 {
 604         struct umoscom_softc *sc = ucom->sc_parent;
 605
 606         /* stop interrupt transfer */
 607         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
 608
 609         /* stop read endpoint */
 610         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 611 }
 612
 613 static void
 614 umoscom_start_write(struct ucom_softc *ucom)
 615 {
 616         struct umoscom_softc *sc = ucom->sc_parent;
 617
 618         usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 619 }
 620
 621 static void
 622 umoscom_stop_write(struct ucom_softc *ucom)
 623 {
 624         struct umoscom_softc *sc = ucom->sc_parent;
 625
 626         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 627 }
 628
 629 static void
 630 umoscom_write_callback(struct usb_xfer *xfer, usb_error_t error)
 631 {
 632         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 633         struct usb_page_cache *pc;
 634         uint32_t actlen;
 635
 636         switch (USB_GET_STATE(xfer)) {
 637         case USB_ST_SETUP:
 638         case USB_ST_TRANSFERRED:
 639 tr_setup:
 640                 DPRINTF("\n");
 641
 642                 pc = usbd_xfer_get_frame(xfer, 0);
 643                 if (ucom_get_data(&sc->sc_ucom, pc, 0,
 644                     UMOSCOM_BUFSIZE, &actlen)) {
 645
 646                         usbd_xfer_set_frame_len(xfer, 0, actlen);
 647                         usbd_transfer_submit(xfer);
 648                 }
 649                 return;
 650
 651         default:                        /* Error */
 652                 if (error != USB_ERR_CANCELLED) {
 653                         DPRINTFN(0, "transfer failed\n");
 654                         /* try to clear stall first */
 655                         usbd_xfer_set_stall(xfer);
 656                         goto tr_setup;
 657                 }
 658                 return;
 659         }
 660 }
 661
 662 static void
 663 umoscom_read_callback(struct usb_xfer *xfer, usb_error_t error)
 664 {
 665         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 666         struct usb_page_cache *pc;
 667         int actlen;
 668
 669         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 670
 671         switch (USB_GET_STATE(xfer)) {
 672         case USB_ST_TRANSFERRED:
 673                 DPRINTF("got %d bytes\n", actlen);
 674                 pc = usbd_xfer_get_frame(xfer, 0);
 675                 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
 676
 677         case USB_ST_SETUP:
 678 tr_setup:
 679                 DPRINTF("\n");
 680
 681                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 682                 usbd_transfer_submit(xfer);
 683                 return;
 684
 685         default:                        /* Error */
 686                 if (error != USB_ERR_CANCELLED) {
 687                         DPRINTFN(0, "transfer failed\n");
 688                         /* try to clear stall first */
 689                         usbd_xfer_set_stall(xfer);
 690                         goto tr_setup;
 691                 }
 692                 return;
 693         }
 694 }
 695
 696 static void
 697 umoscom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
 698 {
 699         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 700         int actlen;
 701
 702         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 703
 704         switch (USB_GET_STATE(xfer)) {
 705         case USB_ST_TRANSFERRED:
 706                 if (actlen < 2) {
 707                         DPRINTF("too short message\n");
 708                         goto tr_setup;
 709                 }
 710                 ucom_status_change(&sc->sc_ucom);
 711
 712         case USB_ST_SETUP:
 713 tr_setup:
 714                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 715                 usbd_transfer_submit(xfer);
 716                 return;
 717
 718         default:                        /* Error */
 719                 if (error != USB_ERR_CANCELLED) {
 720                         DPRINTFN(0, "transfer failed\n");
 721                         /* try to clear stall first */
 722                         usbd_xfer_set_stall(xfer);
 723                         goto tr_setup;
 724                 }
 725                 return;
 726         }
 727 }
 728
 729 static void
 730 umoscom_poll(struct ucom_softc *ucom)
 731 {
 732         struct umoscom_softc *sc = ucom->sc_parent;
 733         usbd_transfer_poll(sc->sc_xfer, UMOSCOM_N_TRANSFER);
 734 }