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 SYSCTL_NODE(_hw_usb, OID_AUTO, umoscom, CTLFLAG_RW, 0, "USB umoscom");
  54 SYSCTL_INT(_hw_usb_umoscom, OID_AUTO, debug, CTLFLAG_RW,
  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
 193 static usb_callback_t umoscom_write_callback;
 194 static usb_callback_t umoscom_read_callback;
 195 static usb_callback_t umoscom_intr_callback;
 196
 197 static void     umoscom_cfg_open(struct ucom_softc *);
 198 static void     umoscom_cfg_close(struct ucom_softc *);
 199 static void     umoscom_cfg_set_break(struct ucom_softc *, uint8_t);
 200 static void     umoscom_cfg_set_dtr(struct ucom_softc *, uint8_t);
 201 static void     umoscom_cfg_set_rts(struct ucom_softc *, uint8_t);
 202 static int      umoscom_pre_param(struct ucom_softc *, struct termios *);
 203 static void     umoscom_cfg_param(struct ucom_softc *, struct termios *);
 204 static void     umoscom_cfg_get_status(struct ucom_softc *, uint8_t *,
 205                     uint8_t *);
 206 static void     umoscom_cfg_write(struct umoscom_softc *, uint16_t, uint16_t);
 207 static uint8_t  umoscom_cfg_read(struct umoscom_softc *, uint16_t);
 208 static void     umoscom_start_read(struct ucom_softc *);
 209 static void     umoscom_stop_read(struct ucom_softc *);
 210 static void     umoscom_start_write(struct ucom_softc *);
 211 static void     umoscom_stop_write(struct ucom_softc *);
 212 static void     umoscom_poll(struct ucom_softc *ucom);
 213
 214 static const struct usb_config umoscom_config_data[UMOSCOM_N_TRANSFER] = {
 215
 216         [UMOSCOM_BULK_DT_WR] = {
 217                 .type = UE_BULK,
 218                 .endpoint = UE_ADDR_ANY,
 219                 .direction = UE_DIR_OUT,
 220                 .bufsize = UMOSCOM_BUFSIZE,
 221                 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
 222                 .callback = &umoscom_write_callback,
 223         },
 224
 225         [UMOSCOM_BULK_DT_RD] = {
 226                 .type = UE_BULK,
 227                 .endpoint = UE_ADDR_ANY,
 228                 .direction = UE_DIR_IN,
 229                 .bufsize = UMOSCOM_BUFSIZE,
 230                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 231                 .callback = &umoscom_read_callback,
 232         },
 233
 234         [UMOSCOM_INTR_DT_RD] = {
 235                 .type = UE_INTERRUPT,
 236                 .endpoint = UE_ADDR_ANY,
 237                 .direction = UE_DIR_IN,
 238                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 239                 .bufsize = 0,   /* use wMaxPacketSize */
 240                 .callback = &umoscom_intr_callback,
 241         },
 242 };
 243
 244 static const struct ucom_callback umoscom_callback = {
 245         /* configuration callbacks */
 246         .ucom_cfg_get_status = &umoscom_cfg_get_status,
 247         .ucom_cfg_set_dtr = &umoscom_cfg_set_dtr,
 248         .ucom_cfg_set_rts = &umoscom_cfg_set_rts,
 249         .ucom_cfg_set_break = &umoscom_cfg_set_break,
 250         .ucom_cfg_param = &umoscom_cfg_param,
 251         .ucom_cfg_open = &umoscom_cfg_open,
 252         .ucom_cfg_close = &umoscom_cfg_close,
 253
 254         /* other callbacks */
 255         .ucom_pre_param = &umoscom_pre_param,
 256         .ucom_start_read = &umoscom_start_read,
 257         .ucom_stop_read = &umoscom_stop_read,
 258         .ucom_start_write = &umoscom_start_write,
 259         .ucom_stop_write = &umoscom_stop_write,
 260         .ucom_poll = &umoscom_poll,
 261 };
 262
 263 static device_method_t umoscom_methods[] = {
 264         DEVMETHOD(device_probe, umoscom_probe),
 265         DEVMETHOD(device_attach, umoscom_attach),
 266         DEVMETHOD(device_detach, umoscom_detach),
 267         {0, 0}
 268 };
 269
 270 static devclass_t umoscom_devclass;
 271
 272 static driver_t umoscom_driver = {
 273         .name = "umoscom",
 274         .methods = umoscom_methods,
 275         .size = sizeof(struct umoscom_softc),
 276 };
 277
 278 DRIVER_MODULE(umoscom, uhub, umoscom_driver, umoscom_devclass, NULL, 0);
 279 MODULE_DEPEND(umoscom, ucom, 1, 1, 1);
 280 MODULE_DEPEND(umoscom, usb, 1, 1, 1);
 281 MODULE_VERSION(umoscom, 1);
 282
 283 static const STRUCT_USB_HOST_ID umoscom_devs[] = {
 284         {USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703, 0)}
 285 };
 286
 287 static int
 288 umoscom_probe(device_t dev)
 289 {
 290         struct usb_attach_arg *uaa = device_get_ivars(dev);
 291
 292         if (uaa->usb_mode != USB_MODE_HOST) {
 293                 return (ENXIO);
 294         }
 295         if (uaa->info.bConfigIndex != UMOSCOM_CONFIG_INDEX) {
 296                 return (ENXIO);
 297         }
 298         if (uaa->info.bIfaceIndex != UMOSCOM_IFACE_INDEX) {
 299                 return (ENXIO);
 300         }
 301         return (usbd_lookup_id_by_uaa(umoscom_devs, sizeof(umoscom_devs), uaa));
 302 }
 303
 304 static int
 305 umoscom_attach(device_t dev)
 306 {
 307         struct usb_attach_arg *uaa = device_get_ivars(dev);
 308         struct umoscom_softc *sc = device_get_softc(dev);
 309         int error;
 310         uint8_t iface_index;
 311
 312         sc->sc_udev = uaa->device;
 313         sc->sc_mcr = 0x08;              /* enable interrupts */
 314
 315         /* XXX the device doesn't provide any ID string, so set a static one */
 316         device_set_desc(dev, "MOSCHIP USB Serial Port Adapter");
 317         device_printf(dev, "<MOSCHIP USB Serial Port Adapter>\n");
 318
 319         mtx_init(&sc->sc_mtx, "umoscom", NULL, MTX_DEF);
 320
 321         iface_index = UMOSCOM_IFACE_INDEX;
 322         error = usbd_transfer_setup(uaa->device, &iface_index,
 323             sc->sc_xfer, umoscom_config_data,
 324             UMOSCOM_N_TRANSFER, sc, &sc->sc_mtx);
 325
 326         if (error) {
 327                 goto detach;
 328         }
 329         /* clear stall at first run */
 330         mtx_lock(&sc->sc_mtx);
 331         usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 332         usbd_xfer_set_stall(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 333         mtx_unlock(&sc->sc_mtx);
 334
 335         error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
 336             &umoscom_callback, &sc->sc_mtx);
 337         if (error) {
 338                 goto detach;
 339         }
 340         ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
 341
 342         return (0);
 343
 344 detach:
 345         device_printf(dev, "attach error: %s\n", usbd_errstr(error));
 346         umoscom_detach(dev);
 347         return (ENXIO);
 348 }
 349
 350 static int
 351 umoscom_detach(device_t dev)
 352 {
 353         struct umoscom_softc *sc = device_get_softc(dev);
 354
 355         ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
 356         usbd_transfer_unsetup(sc->sc_xfer, UMOSCOM_N_TRANSFER);
 357         mtx_destroy(&sc->sc_mtx);
 358
 359         return (0);
 360 }
 361
 362 static void
 363 umoscom_cfg_open(struct ucom_softc *ucom)
 364 {
 365         struct umoscom_softc *sc = ucom->sc_parent;
 366
 367         DPRINTF("\n");
 368
 369         /* Purge FIFOs or odd things happen */
 370         umoscom_cfg_write(sc, UMOSCOM_FIFO, 0x00 | UMOSCOM_UART_REG);
 371
 372         /* Enable FIFO */
 373         umoscom_cfg_write(sc, UMOSCOM_FIFO, UMOSCOM_FIFO_EN |
 374             UMOSCOM_FIFO_RXCLR | UMOSCOM_FIFO_TXCLR |
 375             UMOSCOM_FIFO_DMA_BLK | UMOSCOM_FIFO_RXLVL_MASK |
 376             UMOSCOM_UART_REG);
 377
 378         /* Enable Interrupt Registers */
 379         umoscom_cfg_write(sc, UMOSCOM_INT, 0x0C | UMOSCOM_UART_REG);
 380
 381         /* Magic */
 382         umoscom_cfg_write(sc, 0x01, 0x08);
 383
 384         /* Magic */
 385         umoscom_cfg_write(sc, 0x00, 0x02);
 386 }
 387
 388 static void
 389 umoscom_cfg_close(struct ucom_softc *ucom)
 390 {
 391         return;
 392 }
 393
 394 static void
 395 umoscom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
 396 {
 397         struct umoscom_softc *sc = ucom->sc_parent;
 398         uint16_t val;
 399
 400         val = sc->sc_lcr;
 401         if (onoff)
 402                 val |= UMOSCOM_LCR_BREAK;
 403
 404         umoscom_cfg_write(sc, UMOSCOM_LCR, val | UMOSCOM_UART_REG);
 405 }
 406
 407 static void
 408 umoscom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
 409 {
 410         struct umoscom_softc *sc = ucom->sc_parent;
 411
 412         if (onoff)
 413                 sc->sc_mcr |= UMOSCOM_MCR_DTR;
 414         else
 415                 sc->sc_mcr &= ~UMOSCOM_MCR_DTR;
 416
 417         umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
 418 }
 419
 420 static void
 421 umoscom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
 422 {
 423         struct umoscom_softc *sc = ucom->sc_parent;
 424
 425         if (onoff)
 426                 sc->sc_mcr |= UMOSCOM_MCR_RTS;
 427         else
 428                 sc->sc_mcr &= ~UMOSCOM_MCR_RTS;
 429
 430         umoscom_cfg_write(sc, UMOSCOM_MCR, sc->sc_mcr | UMOSCOM_UART_REG);
 431 }
 432
 433 static int
 434 umoscom_pre_param(struct ucom_softc *ucom, struct termios *t)
 435 {
 436         if ((t->c_ospeed <= 1) || (t->c_ospeed > 115200))
 437                 return (EINVAL);
 438
 439         return (0);
 440 }
 441
 442 static void
 443 umoscom_cfg_param(struct ucom_softc *ucom, struct termios *t)
 444 {
 445         struct umoscom_softc *sc = ucom->sc_parent;
 446         uint16_t data;
 447
 448         DPRINTF("speed=%d\n", t->c_ospeed);
 449
 450         data = ((uint32_t)UMOSCOM_BAUD_REF) / ((uint32_t)t->c_ospeed);
 451
 452         if (data == 0) {
 453                 DPRINTF("invalid baud rate!\n");
 454                 return;
 455         }
 456         umoscom_cfg_write(sc, UMOSCOM_LCR,
 457             UMOSCOM_LCR_DIVLATCH_EN | UMOSCOM_UART_REG);
 458
 459         umoscom_cfg_write(sc, UMOSCOM_BAUDLO,
 460             (data & 0xFF) | UMOSCOM_UART_REG);
 461
 462         umoscom_cfg_write(sc, UMOSCOM_BAUDHI,
 463             ((data >> 8) & 0xFF) | UMOSCOM_UART_REG);
 464
 465         if (t->c_cflag & CSTOPB)
 466                 data = UMOSCOM_LCR_STOP_BITS_2;
 467         else
 468                 data = UMOSCOM_LCR_STOP_BITS_1;
 469
 470         if (t->c_cflag & PARENB) {
 471                 if (t->c_cflag & PARODD)
 472                         data |= UMOSCOM_LCR_PARITY_ODD;
 473                 else
 474                         data |= UMOSCOM_LCR_PARITY_EVEN;
 475         } else
 476                 data |= UMOSCOM_LCR_PARITY_NONE;
 477
 478         switch (t->c_cflag & CSIZE) {
 479         case CS5:
 480                 data |= UMOSCOM_LCR_DBITS(5);
 481                 break;
 482         case CS6:
 483                 data |= UMOSCOM_LCR_DBITS(6);
 484                 break;
 485         case CS7:
 486                 data |= UMOSCOM_LCR_DBITS(7);
 487                 break;
 488         case CS8:
 489                 data |= UMOSCOM_LCR_DBITS(8);
 490                 break;
 491         }
 492
 493         sc->sc_lcr = data;
 494         umoscom_cfg_write(sc, UMOSCOM_LCR, data | UMOSCOM_UART_REG);
 495 }
 496
 497 static void
 498 umoscom_cfg_get_status(struct ucom_softc *ucom, uint8_t *p_lsr, uint8_t *p_msr)
 499 {
 500         struct umoscom_softc *sc = ucom->sc_parent;
 501         uint8_t lsr;
 502         uint8_t msr;
 503
 504         DPRINTFN(5, "\n");
 505
 506         /* read status registers */
 507
 508         lsr = umoscom_cfg_read(sc, UMOSCOM_LSR);
 509         msr = umoscom_cfg_read(sc, UMOSCOM_MSR);
 510
 511         /* translate bits */
 512
 513         if (msr & UMOSCOM_MSR_CTS)
 514                 *p_msr |= SER_CTS;
 515
 516         if (msr & UMOSCOM_MSR_CD)
 517                 *p_msr |= SER_DCD;
 518
 519         if (msr & UMOSCOM_MSR_RI)
 520                 *p_msr |= SER_RI;
 521
 522         if (msr & UMOSCOM_MSR_RTS)
 523                 *p_msr |= SER_DSR;
 524 }
 525
 526 static void
 527 umoscom_cfg_write(struct umoscom_softc *sc, uint16_t reg, uint16_t val)
 528 {
 529         struct usb_device_request req;
 530
 531         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 532         req.bRequest = UMOSCOM_WRITE;
 533         USETW(req.wValue, val);
 534         USETW(req.wIndex, reg);
 535         USETW(req.wLength, 0);
 536
 537         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 538             &req, NULL, 0, 1000);
 539 }
 540
 541 static uint8_t
 542 umoscom_cfg_read(struct umoscom_softc *sc, uint16_t reg)
 543 {
 544         struct usb_device_request req;
 545         uint8_t val;
 546
 547         req.bmRequestType = UT_READ_VENDOR_DEVICE;
 548         req.bRequest = UMOSCOM_READ;
 549         USETW(req.wValue, 0);
 550         USETW(req.wIndex, reg);
 551         USETW(req.wLength, 1);
 552
 553         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 554             &req, &val, 0, 1000);
 555
 556         DPRINTF("reg=0x%04x, val=0x%02x\n", reg, val);
 557
 558         return (val);
 559 }
 560
 561 static void
 562 umoscom_start_read(struct ucom_softc *ucom)
 563 {
 564         struct umoscom_softc *sc = ucom->sc_parent;
 565
 566 #if 0
 567         /* start interrupt endpoint */
 568         usbd_transfer_start(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
 569 #endif
 570         /* start read endpoint */
 571         usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 572 }
 573
 574 static void
 575 umoscom_stop_read(struct ucom_softc *ucom)
 576 {
 577         struct umoscom_softc *sc = ucom->sc_parent;
 578
 579         /* stop interrupt transfer */
 580         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_INTR_DT_RD]);
 581
 582         /* stop read endpoint */
 583         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_RD]);
 584 }
 585
 586 static void
 587 umoscom_start_write(struct ucom_softc *ucom)
 588 {
 589         struct umoscom_softc *sc = ucom->sc_parent;
 590
 591         usbd_transfer_start(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 592 }
 593
 594 static void
 595 umoscom_stop_write(struct ucom_softc *ucom)
 596 {
 597         struct umoscom_softc *sc = ucom->sc_parent;
 598
 599         usbd_transfer_stop(sc->sc_xfer[UMOSCOM_BULK_DT_WR]);
 600 }
 601
 602 static void
 603 umoscom_write_callback(struct usb_xfer *xfer, usb_error_t error)
 604 {
 605         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 606         struct usb_page_cache *pc;
 607         uint32_t actlen;
 608
 609         switch (USB_GET_STATE(xfer)) {
 610         case USB_ST_SETUP:
 611         case USB_ST_TRANSFERRED:
 612 tr_setup:
 613                 DPRINTF("\n");
 614
 615                 pc = usbd_xfer_get_frame(xfer, 0);
 616                 if (ucom_get_data(&sc->sc_ucom, pc, 0,
 617                     UMOSCOM_BUFSIZE, &actlen)) {
 618
 619                         usbd_xfer_set_frame_len(xfer, 0, actlen);
 620                         usbd_transfer_submit(xfer);
 621                 }
 622                 return;
 623
 624         default:                        /* Error */
 625                 if (error != USB_ERR_CANCELLED) {
 626                         DPRINTFN(0, "transfer failed\n");
 627                         /* try to clear stall first */
 628                         usbd_xfer_set_stall(xfer);
 629                         goto tr_setup;
 630                 }
 631                 return;
 632         }
 633 }
 634
 635 static void
 636 umoscom_read_callback(struct usb_xfer *xfer, usb_error_t error)
 637 {
 638         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 639         struct usb_page_cache *pc;
 640         int actlen;
 641
 642         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 643
 644         switch (USB_GET_STATE(xfer)) {
 645         case USB_ST_TRANSFERRED:
 646                 DPRINTF("got %d bytes\n", actlen);
 647                 pc = usbd_xfer_get_frame(xfer, 0);
 648                 ucom_put_data(&sc->sc_ucom, pc, 0, actlen);
 649
 650         case USB_ST_SETUP:
 651 tr_setup:
 652                 DPRINTF("\n");
 653
 654                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 655                 usbd_transfer_submit(xfer);
 656                 return;
 657
 658         default:                        /* Error */
 659                 if (error != USB_ERR_CANCELLED) {
 660                         DPRINTFN(0, "transfer failed\n");
 661                         /* try to clear stall first */
 662                         usbd_xfer_set_stall(xfer);
 663                         goto tr_setup;
 664                 }
 665                 return;
 666         }
 667 }
 668
 669 static void
 670 umoscom_intr_callback(struct usb_xfer *xfer, usb_error_t error)
 671 {
 672         struct umoscom_softc *sc = usbd_xfer_softc(xfer);
 673         int actlen;
 674
 675         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 676
 677         switch (USB_GET_STATE(xfer)) {
 678         case USB_ST_TRANSFERRED:
 679                 if (actlen < 2) {
 680                         DPRINTF("too short message\n");
 681                         goto tr_setup;
 682                 }
 683                 ucom_status_change(&sc->sc_ucom);
 684
 685         case USB_ST_SETUP:
 686 tr_setup:
 687                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 688                 usbd_transfer_submit(xfer);
 689                 return;
 690
 691         default:                        /* Error */
 692                 if (error != USB_ERR_CANCELLED) {
 693                         DPRINTFN(0, "transfer failed\n");
 694                         /* try to clear stall first */
 695                         usbd_xfer_set_stall(xfer);
 696                         goto tr_setup;
 697                 }
 698                 return;
 699         }
 700 }
 701
 702 static void
 703 umoscom_poll(struct ucom_softc *ucom)
 704 {
 705         struct umoscom_softc *sc = ucom->sc_parent;
 706         usbd_transfer_poll(sc->sc_xfer, UMOSCOM_N_TRANSFER);
 707 }