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