sys/bus/u4b/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/param.h>
  22 #include <sys/queue.h>
  23 #include <sys/types.h>
  24 #include <sys/systm.h>
  25 #include <sys/kernel.h>
  26 #include <sys/bus.h>
  27 #include <sys/module.h>
  28 #include <sys/lock.h>
  29 #include <sys/condvar.h>
  30 #include <sys/sysctl.h>
  31 #include <sys/unistd.h>
  32 #include <sys/callout.h>
  33 #include <sys/malloc.h>
  34 #include <sys/priv.h>
  35 #include <sys/serial.h>
  36
  37 #include <bus/u4b/usb.h>
  38 #include <bus/u4b/usbdi.h>
  39 #include <bus/u4b/usbdi_util.h>
  40 #include "usbdevs.h"
  41
  42 #define USB_DEBUG_VAR umoscom_debug
  43 #include <bus/u4b/usb_debug.h>
  44 #include <bus/u4b/usb_process.h>
  45
  46 #include <bus/u4b/serial/usb_serial.h>
  47
  48 #ifdef USB_DEBUG
  49 static int umoscom_debug = 0;
  50
  51 static SYSCTL_NODE(_hw_usb, OID_AUTO, umoscom, CTLFLAG_RW, 0, "USB umoscom");
  52 SYSCTL_INT(_hw_usb_umoscom, OID_AUTO, debug, CTLFLAG_RW,
  53     &umoscom_debug, 0, "Debug level");
  54 #endif
  55
  56 #define UMOSCOM_BUFSIZE        1024     /* bytes */
  57
  58 #define UMOSCOM_CONFIG_INDEX    0
  59 #define UMOSCOM_IFACE_INDEX     0
  60
  61 /* interrupt packet */
  62 #define UMOSCOM_IIR_RLS         0x06
  63 #define UMOSCOM_IIR_RDA         0x04
  64 #define UMOSCOM_IIR_CTI         0x0c
  65 #define UMOSCOM_IIR_THR         0x02
  66 #define UMOSCOM_IIR_MS          0x00
  67
  68 /* registers */
  69 #define UMOSCOM_READ            0x0d
  70 #define UMOSCOM_WRITE           0x0e
  71 #define UMOSCOM_UART_REG        0x0300
  72 #define UMOSCOM_VEND_REG        0x0000
  73
  74 #define UMOSCOM_TXBUF           0x00    /* Write */
  75 #define UMOSCOM_RXBUF           0x00    /* Read */
  76 #define UMOSCOM_INT             0x01
  77 #define UMOSCOM_FIFO            0x02    /* Write */
  78 #define UMOSCOM_ISR             0x02    /* Read */
  79 #define UMOSCOM_LCR             0x03
  80 #define UMOSCOM_MCR             0x04
  81 #define UMOSCOM_LSR             0x05
  82 #define UMOSCOM_MSR             0x06
  83 #define UMOSCOM_SCRATCH         0x07
  84 #define UMOSCOM_DIV_LO          0x08
  85 #define UMOSCOM_DIV_HI          0x09
  86 #define UMOSCOM_EFR             0x0a
  87 #define UMOSCOM_XON1            0x0b
  88 #define UMOSCOM_XON2            0x0c
  89 #define UMOSCOM_XOFF1           0x0d
  90 #define UMOSCOM_XOFF2           0x0e
  91
  92 #define UMOSCOM_BAUDLO          0x00
  93 #define UMOSCOM_BAUDHI          0x01
  94
  95 #define UMOSCOM_INT_RXEN        0x01
  96 #define UMOSCOM_INT_TXEN        0x02
  97 #define UMOSCOM_INT_RSEN        0x04
  98 #define UMOSCOM_INT_MDMEM       0x08
  99 #define UMOSCOM_INT_SLEEP       0x10
 100 #define UMOSCOM_INT_XOFF        0x20
 101 #define UMOSCOM_INT_RTS         0x40
 102
 103 #define UMOSCOM_FIFO_EN         0x01
 104 #define UMOSCOM_FIFO_RXCLR      0x02
 105 #define UMOSCOM_FIFO_TXCLR      0x04
 106 #define UMOSCOM_FIFO_DMA_BLK    0x08
 107 #define UMOSCOM_FIFO_TXLVL_MASK 0x30
 108 #define UMOSCOM_FIFO_TXLVL_8    0x00
 109 #define UMOSCOM_FIFO_TXLVL_16   0x10
 110 #define UMOSCOM_FIFO_TXLVL_32   0x20
 111 #define UMOSCOM_FIFO_TXLVL_56   0x30
 112 #define UMOSCOM_FIFO_RXLVL_MASK 0xc0
 113 #define UMOSCOM_FIFO_RXLVL_8    0x00
 114 #define UMOSCOM_FIFO_RXLVL_16   0x40
 115 #define UMOSCOM_FIFO_RXLVL_56   0x80
 116 #define UMOSCOM_FIFO_RXLVL_80   0xc0
 117
 118 #define UMOSCOM_ISR_MDM         0x00
 119 #define UMOSCOM_ISR_NONE        0x01
 120 #define UMOSCOM_ISR_TX          0x02
 121 #define UMOSCOM_ISR_RX          0x04
 122 #define UMOSCOM_ISR_LINE        0x06
 123 #define UMOSCOM_ISR_RXTIMEOUT   0x0c
 124 #define UMOSCOM_ISR_RX_XOFF     0x10
 125 #define UMOSCOM_ISR_RTSCTS      0x20
 126 #define UMOSCOM_ISR_FIFOEN      0xc0
 127
 128 #define UMOSCOM_LCR_DBITS(x)    ((x) - 5)
 129 #define UMOSCOM_LCR_STOP_BITS_1 0x00
 130 #define UMOSCOM_LCR_STOP_BITS_2 0x04    /* 2 if 6-8 bits/char or 1.5 if 5 */
 131 #define UMOSCOM_LCR_PARITY_NONE 0x00
 132 #define UMOSCOM_LCR_PARITY_ODD  0x08
 133 #define UMOSCOM_LCR_PARITY_EVEN 0x18
 134 #define UMOSCOM_LCR_BREAK       0x40
 135 #define UMOSCOM_LCR_DIVLATCH_EN 0x80
 136
 137 #define UMOSCOM_MCR_DTR         0x01
 138 #define UMOSCOM_MCR_RTS         0x02
 139 #define UMOSCOM_MCR_LOOP        0x04
 140 #define UMOSCOM_MCR_INTEN       0x08
 141 #define UMOSCOM_MCR_LOOPBACK    0x10
 142 #define UMOSCOM_MCR_XONANY      0x20
 143 #define UMOSCOM_MCR_IRDA_EN     0x40
 144 #define UMOSCOM_MCR_BAUD_DIV4   0x80
 145
 146 #define UMOSCOM_LSR_RXDATA      0x01
 147 #define UMOSCOM_LSR_RXOVER      0x02
 148 #define UMOSCOM_LSR_RXPAR_ERR   0x04
 149 #define UMOSCOM_LSR_RXFRM_ERR   0x08
 150 #define UMOSCOM_LSR_RXBREAK     0x10
 151 #define UMOSCOM_LSR_TXEMPTY     0x20
 152 #define UMOSCOM_LSR_TXALLEMPTY  0x40
 153 #define UMOSCOM_LSR_TXFIFO_ERR  0x80
 154
 155 #define UMOSCOM_MSR_CTS_CHG     0x01
 156 #define UMOSCOM_MSR_DSR_CHG     0x02
 157 #define UMOSCOM_MSR_RI_CHG      0x04
 158 #define UMOSCOM_MSR_CD_CHG      0x08
 159 #define UMOSCOM_MSR_CTS         0x10
 160 #define UMOSCOM_MSR_RTS         0x20
 161 #define UMOSCOM_MSR_RI          0x40
 162 #define UMOSCOM_MSR_CD          0x80
 163
 164 #define UMOSCOM_BAUD_REF        115200
 165
 166 enum {
 167         UMOSCOM_BULK_DT_WR,
 168         UMOSCOM_BULK_DT_RD,
 169         UMOSCOM_INTR_DT_RD,
 170         UMOSCOM_N_TRANSFER,
 171 };
 172
 173 struct umoscom_softc {
 174         struct ucom_super_softc sc_super_ucom;
 175         struct ucom_softc sc_ucom;
 176
 177         struct usb_xfer *sc_xfer[UMOSCOM_N_TRANSFER];
 178         struct usb_device *sc_udev;
 179         struct lock sc_lock;
 180
 181         uint8_t sc_mcr;
 182         uint8_t sc_lcr;
 183 };
 184
 185 /* prototypes */
 186
 187 static device_probe_t umoscom_probe;
 188 static device_attach_t umoscom_attach;
 189 static device_detach_t umoscom_detach;
 190
 191 static usb_callback_t umoscom_write_callback;
 192 static usb_callback_t umoscom_read_callback;
 193 static usb_callback_t umoscom_intr_callback;
 194
 195 static void     umoscom_cfg_open(struct ucom_softc *);
 196 static void     umoscom_cfg_close(struct ucom_softc *);
 197 static void     umoscom_cfg_set_break(struct ucom_softc *, uint8_t);
 198 static void     umoscom_cfg_set_dtr(struct ucom_softc *, uint8_t);
 199 static void     umoscom_cfg_set_rts(struct ucom_softc *, uint8_t);
 200 static int      umoscom_pre_param(struct ucom_softc *, struct termios *);
 201 static void     umoscom_cfg_param(struct ucom_softc *, struct termios *);
 202 static void     umoscom_cfg_get_status(struct ucom_softc *, uint8_t *,
 203                     uint8_t *);
 204 static void     umoscom_cfg_write(struct umoscom_softc *, uint16_t, uint16_t);
 205 static uint8_t  umoscom_cfg_read(struct umoscom_softc *, uint16_t);
 206 static void     umoscom_start_read(struct ucom_softc *);
 207 static void     umoscom_stop_read(struct ucom_softc *);
 208 static void     umoscom_start_write(struct ucom_softc *);
 209 static void     umoscom_stop_write(struct ucom_softc *);
 210 static void     umoscom_poll(struct ucom_softc *ucom);
 211
 212 static const struct usb_config umoscom_config_data[UMOSCOM_N_TRANSFER] = {
 213
 214         [UMOSCOM_BULK_DT_WR] = {
 215                 .type = UE_BULK,
 216                 .endpoint = UE_ADDR_ANY,
 217                 .direction = UE_DIR_OUT,
 218                 .bufsize = UMOSCOM_BUFSIZE,
 219                 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
 220                 .callback = &umoscom_write_callback,
 221         },
 222
 223         [UMOSCOM_BULK_DT_RD] = {
 224                 .type = UE_BULK,
 225                 .endpoint = UE_ADDR_ANY,
 226                 .direction = UE_DIR_IN,
 227                 .bufsize = UMOSCOM_BUFSIZE,
 228                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 229                 .callback = &umoscom_read_callback,
 230         },
 231
 232         [UMOSCOM_INTR_DT_RD] = {
 233                 .type = UE_INTERRUPT,
 234                 .endpoint = UE_ADDR_ANY,
 235                 .direction = UE_DIR_IN,
 236                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 237                 .bufsize = 0,   /* use wMaxPacketSize */
 238                 .callback = &umoscom_intr_callback,
 239         },
 240 };
 241
 242 static const struct ucom_callback umoscom_callback = {
 243         /* configuration callbacks */
 244         .ucom_cfg_get_status = &umoscom_cfg_get_status,
 245         .ucom_cfg_set_dtr = &umoscom_cfg_set_dtr,
 246         .ucom_cfg_set_rts = &umoscom_cfg_set_rts,
 247         .ucom_cfg_set_break = &umoscom_cfg_set_break,
 248         .ucom_cfg_param = &umoscom_cfg_param,
 249         .ucom_cfg_open = &umoscom_cfg_open,
 250         .ucom_cfg_close = &umoscom_cfg_close,
 251
 252         /* other callbacks */
 253         .ucom_pre_param = &umoscom_pre_param,
 254         .ucom_start_read = &umoscom_start_read,
 255         .ucom_stop_read = &umoscom_stop_read,
 256         .ucom_start_write = &umoscom_start_write,
 257         .ucom_stop_write = &umoscom_stop_write,
 258         .ucom_poll = &umoscom_poll,
 259 };
 260
 261 static device_method_t umoscom_methods[] = {
 262         DEVMETHOD(device_probe, umoscom_probe),
 263         DEVMETHOD(device_attach, umoscom_attach),
 264         DEVMETHOD(device_detach, umoscom_detach),
 265         DEVMETHOD_END
 266 };
 267
 268 static devclass_t umoscom_devclass;
 269
 270 static driver_t umoscom_driver = {
 271         .name = "umoscom",
 272         .methods = umoscom_methods,
 273         .size = sizeof(struct umoscom_softc),
 274 };
 275
 276 static const STRUCT_USB_HOST_ID umoscom_devs[] = {
 277         {USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703, 0)}
 278 };
 279
 280 DRIVER_MODULE(umoscom, uhub, umoscom_driver, umoscom_devclass, NULL, NULL);
 281 MODULE_DEPEND(umoscom, ucom, 1, 1, 1);
 282 MODULE_DEPEND(umoscom, usb, 1, 1, 1);
 283 MODULE_VERSION(umoscom, 1);
 284
 285 static int
 286 umoscom_probe(device_t dev)
 287 {
 288         struct usb_attach_arg *uaa = device_get_ivars(dev);
 289
 290         if (uaa->usb_mode != USB_MODE_HOST) {
 291                 return (ENXIO);
 292         }
 293         if (uaa->info.bConfigIndex != UMOSCOM_CONFIG_INDEX) {
 294                 return (ENXIO);
 295         }
 296         if (uaa->info.bIfaceIndex != UMOSCOM_IFACE_INDEX) {
 297                 return (ENXIO);
 298         }
 299         return (usbd_lookup_id_by_uaa(umoscom_devs, sizeof(umoscom_devs), uaa));
 300 }
 301
 302 static int
 303 umoscom_attach(device_t dev)
 304 {
 305         struct usb_attach_arg *uaa = device_get_ivars(dev);
 306         struct umoscom_softc *sc = device_get_softc(dev);
 307         int error;
 308         uint8_t iface_index;
 309
 310         sc->sc_udev = uaa->device;
 311         sc->sc_mcr = 0x08;              /* enable interrupts */
 312
 313         /* XXX the device doesn't provide any ID string, so set a static one */
 314         device_set_desc(dev, "MOSCHIP USB Serial Port Adapter");
 315         device_printf(dev, "<MOSCHIP USB Serial Port Adapter>\n");
 316
 317         lockinit(&sc->sc_lock, "umoscom", 0, LK_CANRECURSE);
 318
 319         iface_index = UMOSCOM_IFACE_INDEX;
 320         error = usbd_transfer_setup(uaa->device, &iface_index,
 321             sc->sc_xfer, umoscom_config_data,
 322             UMOSCOM_N_TRANSFER, sc, &sc->sc_lock);
 323
 324         if (error) {
 325                 goto detach;
 326         }
 327         /* clear stall at first run */
 328         lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 329         usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 330         usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 331         lockmgr(&sc->sc_lock, LK_RELEASE);
 332
 333         error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
 334             &umoscom_callback, &sc->sc_lock);
 335         if (error) {
 336                 goto detach;
 337         }
 338         ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
 339
 340         return (0);
 341
 342 detach:
 343         device_printf(dev, "attach error: %s\n", usbd_errstr(error));
 344         umoscom_detach(dev);
 345         return (ENXIO);
 346 }
 347
 348 static int
 349 umoscom_detach(device_t dev)
 350 {
 351         struct umoscom_softc *sc = device_get_softc(dev);
 352
 353         ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
 354         usbd_transfer_unsetup(sc->sc_xfer, UMOSCOM_N_TRANSFER);
 355         lockuninit(&sc->sc_lock);
 356
 357         return (0);
 358 }
 359
 360 static void
 361 umoscom_cfg_open(struct ucom_softc *ucom)
 362 {
 363         struct umoscom_softc *sc = ucom->sc_parent;
 364
 365         DPRINTF("\n");
 366
 367         /* Purge FIFOs or odd things happen */
 368         umoscom_cfg_write(sc, UMOSCOM_FIFO, 0x00 | UMOSCOM_UART_REG);
 369
 370         /* Enable FIFO */
 371         umoscom_cfg_write(sc, UMOSCOM_FIFO, UMOSCOM_FIFO_EN |
 372             UMOSCOM_FIFO_RXCLR | UMOSCOM_FIFO_TXCLR |
 373             UMOSCOM_FIFO_DMA_BLK | UMOSCOM_FIFO_RXLVL_MASK |
 374             UMOSCOM_UART_REG);
 375
 376         /* Enable Interrupt Registers */
 377         umoscom_cfg_write(sc, UMOSCOM_INT, 0x0C | UMOSCOM_UART_REG);
 378
 379         /* Magic */
 380         umoscom_cfg_write(sc, 0x01, 0x08);
 381
 382         /* Magic */
 383         umoscom_cfg_write(sc, 0x00, 0x02);
 384 }
 385
 386 static void
 387 umoscom_cfg_close(struct ucom_softc *ucom)
 388 {
 389         return;
 390 }
 391
 392 static void
 393 umoscom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
 394 {
 395         struct umoscom_softc *sc = ucom->sc_parent;
 396         uint16_t val;
 397
 398         val = sc->sc_lcr;
 399         if (onoff)
 400                 val |= UMOSCOM_LCR_BREAK;
 401
 402         umoscom_cfg_write(sc, UMOSCOM_LCR, val | UMOSCOM_UART_REG);
 403 }
 404
 405 static void
 406 umoscom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
 407 {
 408         struct umoscom_softc *sc = ucom->sc_parent;
 409
 410         if (onoff)
 411                 sc->sc_mcr |= UMOSCOM_MCR_DTR;
 412         else
 413                 sc->sc_mcr &= ~UMOSCOM_MCR_DTR;
 414
 415         umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
 416 }
 417
 418 static void
 419 umoscom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
 420 {
 421         struct umoscom_softc *sc = ucom->sc_parent;
 422
 423         if (onoff)
 424                 sc->sc_mcr |= UMOSCOM_MCR_RTS;
 425         else
 426                 sc->sc_mcr &= ~UMOSCOM_MCR_RTS;
 427
 428         umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
 429 }
 430
 431 static int
 432 umoscom_pre_param(struct ucom_softc *ucom, struct termios *t)
 433 {
 434         if ((t->c_ospeed <= 1) || (t->c_ospeed > 115200))
 435                 return (EINVAL);
 436
 437         return (0);
 438 }
 439
 440 static void
 441 umoscom_cfg_param(struct ucom_softc *ucom, struct termios *t)
 442 {
 443         struct umoscom_softc *sc = ucom->sc_parent;
 444         uint16_t data;
 445
 446         DPRINTF("speed=%d\n", t->c_ospeed);
 447
 448         data = ((uint32_t)UMOSCOM_BAUD_REF) / ((uint32_t)t->c_ospeed);
 449
 450         if (data == 0) {
 451                 DPRINTF("invalid baud rate!\n");
 452                 return;
 453         }
 454         umoscom_cfg_write(sc, UMOSCOM_LCR,
 455             UMOSCOM_LCR_DIVLATCH_EN | UMOSCOM_UART_REG);
 456
 457         umoscom_cfg_write(sc, UMOSCOM_BAUDLO,
 458             (data & 0xFF) | UMOSCOM_UART_REG);
 459
 460         umoscom_cfg_write(sc, UMOSCOM_BAUDHI,
 461             ((data >> 8) & 0xFF) | UMOSCOM_UART_REG);
 462
 463         if (t->c_cflag & CSTOPB)
 464                 data = UMOSCOM_LCR_STOP_BITS_2;
 465         else
 466                 data = UMOSCOM_LCR_STOP_BITS_1;
 467
 468         if (t->c_cflag & PARENB) {
 469                 if (t->c_cflag & PARODD)
 470                         data |= UMOSCOM_LCR_PARITY_ODD;
 471                 else
 472                         data |= UMOSCOM_LCR_PARITY_EVEN;
 473         } else
 474                 data |= UMOSCOM_LCR_PARITY_NONE;
 475
 476         switch (t->c_cflag & CSIZE) {
 477         case CS5:
 478                 data |= UMOSCOM_LCR_DBITS(5);
 479                 break;
 480         case CS6:
 481                 data |= UMOSCOM_LCR_DBITS(6);
 482                 break;
 483         case CS7:
 484                 data |= UMOSCOM_LCR_DBITS(7);
 485                 break;
 486         case CS8:
 487                 data |= UMOSCOM_LCR_DBITS(8);
 488                 break;
 489         }
 490
 491         sc->sc_lcr = data;
 492         umoscom_cfg_write(sc, UMOSCOM_LCR, data | UMOSCOM_UART_REG);
 493 }
 494
 495 static void
 496 umoscom_cfg_get_status(struct ucom_softc *ucom, uint8_t *p_lsr, uint8_t *p_msr)
 497 {
 498         struct umoscom_softc *sc = ucom->sc_parent;
 499         uint8_t lsr;
 500         uint8_t msr;
 501
 502         DPRINTFN(5, "\n");
 503
 504         /* read status registers */
 505
 506         lsr = umoscom_cfg_read(sc, UMOSCOM_LSR);
 507         msr = umoscom_cfg_read(sc, UMOSCOM_MSR);
 508
 509         /* translate bits */
 510
 511         if (msr & UMOSCOM_MSR_CTS)
 512                 *p_msr |= SER_CTS;
 513
 514         if (msr & UMOSCOM_MSR_CD)
 515                 *p_msr |= SER_DCD;
 516
 517         if (msr & UMOSCOM_MSR_RI)
 518                 *p_msr |= SER_RI;
 519
 520         if (msr & UMOSCOM_MSR_RTS)
 521                 *p_msr |= SER_DSR;
 522 }
 523
 524 static void
 525 umoscom_cfg_write(struct umoscom_softc *sc, uint16_t reg, uint16_t val)
 526 {
 527         struct usb_device_request req;
 528
 529         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 530         req.bRequest = UMOSCOM_WRITE;
 531         USETW(req.wValue, val);
 532         USETW(req.wIndex, reg);
 533         USETW(req.wLength, 0);
 534
 535         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 536             &req, NULL, 0, 1000);
 537 }
 538
 539 static uint8_t
 540 umoscom_cfg_read(struct umoscom_softc *sc, uint16_t reg)
 541 {
 542         struct usb_device_request req;
 543         uint8_t val;
 544
 545         req.bmRequestType = UT_READ_VENDOR_DEVICE;
 546         req.bRequest = UMOSCOM_READ;
 547         USETW(req.wValue, 0);
 548         USETW(req.wIndex, reg);
 549         USETW(req.wLength, 1);
 550
 551         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 552             &req, &val, 0, 1000);
 553
 554         DPRINTF("reg=0x%04x, val=0x%02x\n", reg, val);
 555
 556         return (val);
 557 }
 558
 559 static void
 560 umoscom_start_read(struct ucom_softc *ucom)
 561 {
 562         struct umoscom_softc *sc = ucom->sc_parent;
 563
 564 #if 0
 565         /* start interrupt endpoint */
 566         usbd_transfer_start(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
 567 #endif
 568         /* start read endpoint */
 569         usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 570 }
 571
 572 static void
 573 umoscom_stop_read(struct ucom_softc *ucom)
 574 {
 575         struct umoscom_softc *sc = ucom->sc_parent;
 576
 577         /* stop interrupt transfer */
 578         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
 579
 580         /* stop read endpoint */
 581         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 582 }
 583
 584 static void
 585 umoscom_start_write(struct ucom_softc *ucom)
 586 {
 587         struct umoscom_softc *sc = ucom->sc_parent;
 588
 589         usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 590 }
 591
 592 static void
 593 umoscom_stop_write(struct ucom_softc *ucom)
 594 {
 595         struct umoscom_softc *sc = ucom->sc_parent;
 596
 597         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 598 }
 599
 600 static void
 601 umoscom_write_callback(struct usb_xfer *xfer, usb_error_t error)
 602 {
 603         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 604         struct usb_page_cache *pc;
 605         uint32_t actlen;
 606
 607         switch (USB_GET_STATE(xfer)) {
 608         case USB_ST_SETUP:
 609         case USB_ST_TRANSFERRED:
 610 tr_setup:
 611                 DPRINTF("\n");
 612
 613                 pc = usbd_xfer_get_frame(xfer, 0);
 614                 if (ucom_get_data(&sc->sc_ucom, pc, 0,
 615                     UMOSCOM_BUFSIZE, &actlen)) {
 616
 617                         usbd_xfer_set_frame_len(xfer, 0, actlen);
 618                         usbd_transfer_submit(xfer);
 619                 }
 620                 return;
 621
 622         default:                        /* Error */
 623                 if (error != USB_ERR_CANCELLED) {
 624                         DPRINTFN(0, "transfer failed\n");
 625                         /* try to clear stall first */
 626                         usbd_xfer_set_stall(xfer);
 627                         goto tr_setup;
 628                 }
 629                 return;
 630         }
 631 }
 632
 633 static void
 634 umoscom_read_callback(struct usb_xfer *xfer, usb_error_t error)
 635 {
 636         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 637         struct usb_page_cache *pc;
 638         int actlen;
 639
 640         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 641
 642         switch (USB_GET_STATE(xfer)) {
 643         case USB_ST_TRANSFERRED:
 644                 DPRINTF("got %d bytes\n", actlen);
 645                 pc = usbd_xfer_get_frame(xfer, 0);
 646                 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
 647
 648         case USB_ST_SETUP:
 649 tr_setup:
 650                 DPRINTF("\n");
 651
 652                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 653                 usbd_transfer_submit(xfer);
 654                 return;
 655
 656         default:                        /* Error */
 657                 if (error != USB_ERR_CANCELLED) {
 658                         DPRINTFN(0, "transfer failed\n");
 659                         /* try to clear stall first */
 660                         usbd_xfer_set_stall(xfer);
 661                         goto tr_setup;
 662                 }
 663                 return;
 664         }
 665 }
 666
 667 static void
 668 umoscom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
 669 {
 670         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 671         int actlen;
 672
 673         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 674
 675         switch (USB_GET_STATE(xfer)) {
 676         case USB_ST_TRANSFERRED:
 677                 if (actlen < 2) {
 678                         DPRINTF("too short message\n");
 679                         goto tr_setup;
 680                 }
 681                 ucom_status_change(&sc->sc_ucom);
 682
 683         case USB_ST_SETUP:
 684 tr_setup:
 685                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 686                 usbd_transfer_submit(xfer);
 687                 return;
 688
 689         default:                        /* Error */
 690                 if (error != USB_ERR_CANCELLED) {
 691                         DPRINTFN(0, "transfer failed\n");
 692                         /* try to clear stall first */
 693                         usbd_xfer_set_stall(xfer);
 694                         goto tr_setup;
 695                 }
 696                 return;
 697         }
 698 }
 699
 700 static void
 701 umoscom_poll(struct ucom_softc *ucom)
 702 {
 703         struct umoscom_softc *sc = ucom->sc_parent;
 704         usbd_transfer_poll(sc->sc_xfer, UMOSCOM_N_TRANSFER);
 705 }