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