drivers/usb/serial/iuu_phoenix.c

   1 /*
   2  * Infinity Unlimited USB Phoenix driver
   3  *
   4  * Copyright (C) 2010 James Courtier-Dutton (James@superbug.co.uk)
   5
   6  * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
   7  *
   8  * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos BorrÃ¡s)
   9  *
  10  *      This program is free software; you can redistribute it and/or modify
  11  *      it under the terms of the GNU General Public License as published by
  12  *      the Free Software Foundation; either version 2 of the License, or
  13  *      (at your option) any later version.
  14  *
  15  *  And tested with help of WB Electronics
  16  *
  17  */
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/slab.h>
  21 #include <linux/tty.h>
  22 #include <linux/tty_driver.h>
  23 #include <linux/tty_flip.h>
  24 #include <linux/serial.h>
  25 #include <linux/module.h>
  26 #include <linux/moduleparam.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/usb.h>
  30 #include <linux/usb/serial.h>
  31 #include "iuu_phoenix.h"
  32 #include <linux/random.h>
  33
  34 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
  35
  36 static const struct usb_device_id id_table[] = {
  37         {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
  38         {}                      /* Terminating entry */
  39 };
  40 MODULE_DEVICE_TABLE(usb, id_table);
  41
  42 /* turbo parameter */
  43 static int boost = 100;
  44 static int clockmode = 1;
  45 static int cdmode = 1;
  46 static int iuu_cardin;
  47 static int iuu_cardout;
  48 static bool xmas;
  49 static int vcc_default = 5;
  50
  51 static int iuu_create_sysfs_attrs(struct usb_serial_port *port);
  52 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port);
  53 static void read_rxcmd_callback(struct urb *urb);
  54
  55 struct iuu_private {
  56         spinlock_t lock;        /* store irq state */
  57         u8 line_status;
  58         int tiostatus;          /* store IUART SIGNAL for tiocmget call */
  59         u8 reset;               /* if 1 reset is needed */
  60         int poll;               /* number of poll */
  61         u8 *writebuf;           /* buffer for writing to device */
  62         int writelen;           /* num of byte to write to device */
  63         u8 *buf;                /* used for initialize speed */
  64         u8 len;
  65         int vcc;                /* vcc (either 3 or 5 V) */
  66         u32 baud;
  67         u32 boost;
  68         u32 clk;
  69 };
  70
  71 static int iuu_attach(struct usb_serial *serial)
  72 {
  73         unsigned char num_ports = serial->num_ports;
  74
  75         if (serial->num_bulk_in < num_ports || serial->num_bulk_out < num_ports)
  76                 return -ENODEV;
  77
  78         return 0;
  79 }
  80
  81 static int iuu_port_probe(struct usb_serial_port *port)
  82 {
  83         struct iuu_private *priv;
  84         int ret;
  85
  86         priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
  87         if (!priv)
  88                 return -ENOMEM;
  89
  90         priv->buf = kzalloc(256, GFP_KERNEL);
  91         if (!priv->buf) {
  92                 kfree(priv);
  93                 return -ENOMEM;
  94         }
  95
  96         priv->writebuf = kzalloc(256, GFP_KERNEL);
  97         if (!priv->writebuf) {
  98                 kfree(priv->buf);
  99                 kfree(priv);
 100                 return -ENOMEM;
 101         }
 102
 103         priv->vcc = vcc_default;
 104         spin_lock_init(&priv->lock);
 105
 106         usb_set_serial_port_data(port, priv);
 107
 108         ret = iuu_create_sysfs_attrs(port);
 109         if (ret) {
 110                 kfree(priv->writebuf);
 111                 kfree(priv->buf);
 112                 kfree(priv);
 113                 return ret;
 114         }
 115
 116         return 0;
 117 }
 118
 119 static int iuu_port_remove(struct usb_serial_port *port)
 120 {
 121         struct iuu_private *priv = usb_get_serial_port_data(port);
 122
 123         iuu_remove_sysfs_attrs(port);
 124         kfree(priv->writebuf);
 125         kfree(priv->buf);
 126         kfree(priv);
 127
 128         return 0;
 129 }
 130
 131 static int iuu_tiocmset(struct tty_struct *tty,
 132                         unsigned int set, unsigned int clear)
 133 {
 134         struct usb_serial_port *port = tty->driver_data;
 135         struct iuu_private *priv = usb_get_serial_port_data(port);
 136         unsigned long flags;
 137
 138         /* FIXME: locking on tiomstatus */
 139         dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
 140                 __func__, set, clear);
 141
 142         spin_lock_irqsave(&priv->lock, flags);
 143
 144         if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
 145                 dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
 146                 priv->reset = 1;
 147         }
 148         if (set & TIOCM_RTS)
 149                 priv->tiostatus = TIOCM_RTS;
 150
 151         spin_unlock_irqrestore(&priv->lock, flags);
 152         return 0;
 153 }
 154
 155 /* This is used to provide a carrier detect mechanism
 156  * When a card is present, the response is 0x00
 157  * When no card , the reader respond with TIOCM_CD
 158  * This is known as CD autodetect mechanism
 159  */
 160 static int iuu_tiocmget(struct tty_struct *tty)
 161 {
 162         struct usb_serial_port *port = tty->driver_data;
 163         struct iuu_private *priv = usb_get_serial_port_data(port);
 164         unsigned long flags;
 165         int rc;
 166
 167         spin_lock_irqsave(&priv->lock, flags);
 168         rc = priv->tiostatus;
 169         spin_unlock_irqrestore(&priv->lock, flags);
 170
 171         return rc;
 172 }
 173
 174 static void iuu_rxcmd(struct urb *urb)
 175 {
 176         struct usb_serial_port *port = urb->context;
 177         int result;
 178         int status = urb->status;
 179
 180         if (status) {
 181                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 182                 /* error stop all */
 183                 return;
 184         }
 185
 186
 187         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
 188         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 189                           usb_sndbulkpipe(port->serial->dev,
 190                                           port->bulk_out_endpointAddress),
 191                           port->write_urb->transfer_buffer, 1,
 192                           read_rxcmd_callback, port);
 193         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 194 }
 195
 196 static int iuu_reset(struct usb_serial_port *port, u8 wt)
 197 {
 198         struct iuu_private *priv = usb_get_serial_port_data(port);
 199         int result;
 200         char *buf_ptr = port->write_urb->transfer_buffer;
 201
 202         /* Prepare the reset sequence */
 203
 204         *buf_ptr++ = IUU_RST_SET;
 205         *buf_ptr++ = IUU_DELAY_MS;
 206         *buf_ptr++ = wt;
 207         *buf_ptr = IUU_RST_CLEAR;
 208
 209         /* send the sequence */
 210
 211         usb_fill_bulk_urb(port->write_urb,
 212                           port->serial->dev,
 213                           usb_sndbulkpipe(port->serial->dev,
 214                                           port->bulk_out_endpointAddress),
 215                           port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
 216         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 217         priv->reset = 0;
 218         return result;
 219 }
 220
 221 /* Status Function
 222  * Return value is
 223  * 0x00 = no card
 224  * 0x01 = smartcard
 225  * 0x02 = sim card
 226  */
 227 static void iuu_update_status_callback(struct urb *urb)
 228 {
 229         struct usb_serial_port *port = urb->context;
 230         struct iuu_private *priv = usb_get_serial_port_data(port);
 231         u8 *st;
 232         int status = urb->status;
 233
 234         if (status) {
 235                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 236                 /* error stop all */
 237                 return;
 238         }
 239
 240         st = urb->transfer_buffer;
 241         dev_dbg(&port->dev, "%s - enter\n", __func__);
 242         if (urb->actual_length == 1) {
 243                 switch (st[0]) {
 244                 case 0x1:
 245                         priv->tiostatus = iuu_cardout;
 246                         break;
 247                 case 0x0:
 248                         priv->tiostatus = iuu_cardin;
 249                         break;
 250                 default:
 251                         priv->tiostatus = iuu_cardin;
 252                 }
 253         }
 254         iuu_rxcmd(urb);
 255 }
 256
 257 static void iuu_status_callback(struct urb *urb)
 258 {
 259         struct usb_serial_port *port = urb->context;
 260         int result;
 261         int status = urb->status;
 262
 263         dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 264         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 265                           usb_rcvbulkpipe(port->serial->dev,
 266                                           port->bulk_in_endpointAddress),
 267                           port->read_urb->transfer_buffer, 256,
 268                           iuu_update_status_callback, port);
 269         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 270 }
 271
 272 static int iuu_status(struct usb_serial_port *port)
 273 {
 274         int result;
 275
 276         memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
 277         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 278                           usb_sndbulkpipe(port->serial->dev,
 279                                           port->bulk_out_endpointAddress),
 280                           port->write_urb->transfer_buffer, 1,
 281                           iuu_status_callback, port);
 282         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 283         return result;
 284
 285 }
 286
 287 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 288 {
 289         int status;
 290         struct usb_serial *serial = port->serial;
 291         int actual = 0;
 292
 293         /* send the data out the bulk port */
 294
 295         status =
 296             usb_bulk_msg(serial->dev,
 297                          usb_sndbulkpipe(serial->dev,
 298                                          port->bulk_out_endpointAddress), buf,
 299                          count, &actual, 1000);
 300
 301         if (status != IUU_OPERATION_OK)
 302                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 303         else
 304                 dev_dbg(&port->dev, "%s - write OK !\n", __func__);
 305         return status;
 306 }
 307
 308 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 309 {
 310         int status;
 311         struct usb_serial *serial = port->serial;
 312         int actual = 0;
 313
 314         /* send the data out the bulk port */
 315         status =
 316             usb_bulk_msg(serial->dev,
 317                          usb_rcvbulkpipe(serial->dev,
 318                                          port->bulk_in_endpointAddress), buf,
 319                          count, &actual, 1000);
 320
 321         if (status != IUU_OPERATION_OK)
 322                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 323         else
 324                 dev_dbg(&port->dev, "%s - read OK !\n", __func__);
 325         return status;
 326 }
 327
 328 static int iuu_led(struct usb_serial_port *port, unsigned int R,
 329                    unsigned int G, unsigned int B, u8 f)
 330 {
 331         int status;
 332         u8 *buf;
 333         buf = kmalloc(8, GFP_KERNEL);
 334         if (!buf)
 335                 return -ENOMEM;
 336
 337         buf[0] = IUU_SET_LED;
 338         buf[1] = R & 0xFF;
 339         buf[2] = (R >> 8) & 0xFF;
 340         buf[3] = G & 0xFF;
 341         buf[4] = (G >> 8) & 0xFF;
 342         buf[5] = B & 0xFF;
 343         buf[6] = (B >> 8) & 0xFF;
 344         buf[7] = f;
 345         status = bulk_immediate(port, buf, 8);
 346         kfree(buf);
 347         if (status != IUU_OPERATION_OK)
 348                 dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
 349         else
 350                 dev_dbg(&port->dev, "%s - led OK !\n", __func__);
 351         return IUU_OPERATION_OK;
 352 }
 353
 354 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
 355                                  u8 b2, u8 freq)
 356 {
 357         *buf++ = IUU_SET_LED;
 358         *buf++ = r1;
 359         *buf++ = r2;
 360         *buf++ = g1;
 361         *buf++ = g2;
 362         *buf++ = b1;
 363         *buf++ = b2;
 364         *buf = freq;
 365 }
 366
 367 static void iuu_led_activity_on(struct urb *urb)
 368 {
 369         struct usb_serial_port *port = urb->context;
 370         int result;
 371         char *buf_ptr = port->write_urb->transfer_buffer;
 372         *buf_ptr++ = IUU_SET_LED;
 373         if (xmas == 1) {
 374                 get_random_bytes(buf_ptr, 6);
 375                 *(buf_ptr+7) = 1;
 376         } else {
 377                 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
 378         }
 379
 380         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 381                           usb_sndbulkpipe(port->serial->dev,
 382                                           port->bulk_out_endpointAddress),
 383                           port->write_urb->transfer_buffer, 8 ,
 384                           iuu_rxcmd, port);
 385         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 386 }
 387
 388 static void iuu_led_activity_off(struct urb *urb)
 389 {
 390         struct usb_serial_port *port = urb->context;
 391         int result;
 392         char *buf_ptr = port->write_urb->transfer_buffer;
 393         if (xmas == 1) {
 394                 iuu_rxcmd(urb);
 395                 return;
 396         } else {
 397                 *buf_ptr++ = IUU_SET_LED;
 398                 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
 399         }
 400         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 401                           usb_sndbulkpipe(port->serial->dev,
 402                                           port->bulk_out_endpointAddress),
 403                           port->write_urb->transfer_buffer, 8 ,
 404                           iuu_rxcmd, port);
 405         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 406 }
 407
 408
 409
 410 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
 411 {
 412         int status;
 413         struct iuu_private *priv = usb_get_serial_port_data(port);
 414         int Count = 0;
 415         u8 FrqGenAdr = 0x69;
 416         u8 DIV = 0;             /* 8bit */
 417         u8 XDRV = 0;            /* 8bit */
 418         u8 PUMP = 0;            /* 3bit */
 419         u8 PBmsb = 0;           /* 2bit */
 420         u8 PBlsb = 0;           /* 8bit */
 421         u8 PO = 0;              /* 1bit */
 422         u8 Q = 0;               /* 7bit */
 423         /* 24bit = 3bytes */
 424         unsigned int P = 0;
 425         unsigned int P2 = 0;
 426         int frq = (int)dwFrq;
 427
 428         if (frq == 0) {
 429                 priv->buf[Count++] = IUU_UART_WRITE_I2C;
 430                 priv->buf[Count++] = FrqGenAdr << 1;
 431                 priv->buf[Count++] = 0x09;
 432                 priv->buf[Count++] = 0x00;
 433
 434                 status = bulk_immediate(port, (u8 *) priv->buf, Count);
 435                 if (status != 0) {
 436                         dev_dbg(&port->dev, "%s - write error\n", __func__);
 437                         return status;
 438                 }
 439         } else if (frq == 3579000) {
 440                 DIV = 100;
 441                 P = 1193;
 442                 Q = 40;
 443                 XDRV = 0;
 444         } else if (frq == 3680000) {
 445                 DIV = 105;
 446                 P = 161;
 447                 Q = 5;
 448                 XDRV = 0;
 449         } else if (frq == 6000000) {
 450                 DIV = 66;
 451                 P = 66;
 452                 Q = 2;
 453                 XDRV = 0x28;
 454         } else {
 455                 unsigned int result = 0;
 456                 unsigned int tmp = 0;
 457                 unsigned int check;
 458                 unsigned int check2;
 459                 char found = 0x00;
 460                 unsigned int lQ = 2;
 461                 unsigned int lP = 2055;
 462                 unsigned int lDiv = 4;
 463
 464                 for (lQ = 2; lQ <= 47 && !found; lQ++)
 465                         for (lP = 2055; lP >= 8 && !found; lP--)
 466                                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
 467                                         tmp = (12000000 / lDiv) * (lP / lQ);
 468                                         if (abs((int)(tmp - frq)) <
 469                                             abs((int)(frq - result))) {
 470                                                 check2 = (12000000 / lQ);
 471                                                 if (check2 < 250000)
 472                                                         continue;
 473                                                 check = (12000000 / lQ) * lP;
 474                                                 if (check > 400000000)
 475                                                         continue;
 476                                                 if (check < 100000000)
 477                                                         continue;
 478                                                 if (lDiv < 4 || lDiv > 127)
 479                                                         continue;
 480                                                 result = tmp;
 481                                                 P = lP;
 482                                                 DIV = lDiv;
 483                                                 Q = lQ;
 484                                                 if (result == frq)
 485                                                         found = 0x01;
 486                                         }
 487                                 }
 488         }
 489         P2 = ((P - PO) / 2) - 4;
 490         DIV = DIV;
 491         PUMP = 0x04;
 492         PBmsb = (P2 >> 8 & 0x03);
 493         PBlsb = P2 & 0xFF;
 494         PO = (P >> 10) & 0x01;
 495         Q = Q - 2;
 496
 497         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 498         priv->buf[Count++] = FrqGenAdr << 1;
 499         priv->buf[Count++] = 0x09;
 500         priv->buf[Count++] = 0x20;      /* Adr = 0x09 */
 501         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 502         priv->buf[Count++] = FrqGenAdr << 1;
 503         priv->buf[Count++] = 0x0C;
 504         priv->buf[Count++] = DIV;       /* Adr = 0x0C */
 505         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 506         priv->buf[Count++] = FrqGenAdr << 1;
 507         priv->buf[Count++] = 0x12;
 508         priv->buf[Count++] = XDRV;      /* Adr = 0x12 */
 509         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 510         priv->buf[Count++] = FrqGenAdr << 1;
 511         priv->buf[Count++] = 0x13;
 512         priv->buf[Count++] = 0x6B;      /* Adr = 0x13 */
 513         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 514         priv->buf[Count++] = FrqGenAdr << 1;
 515         priv->buf[Count++] = 0x40;
 516         priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
 517                              (PBmsb & 0x03);    /* Adr = 0x40 */
 518         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 519         priv->buf[Count++] = FrqGenAdr << 1;
 520         priv->buf[Count++] = 0x41;
 521         priv->buf[Count++] = PBlsb;     /* Adr = 0x41 */
 522         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 523         priv->buf[Count++] = FrqGenAdr << 1;
 524         priv->buf[Count++] = 0x42;
 525         priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
 526         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 527         priv->buf[Count++] = FrqGenAdr << 1;
 528         priv->buf[Count++] = 0x44;
 529         priv->buf[Count++] = (char)0xFF;        /* Adr = 0x44 */
 530         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 531         priv->buf[Count++] = FrqGenAdr << 1;
 532         priv->buf[Count++] = 0x45;
 533         priv->buf[Count++] = (char)0xFE;        /* Adr = 0x45 */
 534         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 535         priv->buf[Count++] = FrqGenAdr << 1;
 536         priv->buf[Count++] = 0x46;
 537         priv->buf[Count++] = 0x7F;      /* Adr = 0x46 */
 538         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 539         priv->buf[Count++] = FrqGenAdr << 1;
 540         priv->buf[Count++] = 0x47;
 541         priv->buf[Count++] = (char)0x84;        /* Adr = 0x47 */
 542
 543         status = bulk_immediate(port, (u8 *) priv->buf, Count);
 544         if (status != IUU_OPERATION_OK)
 545                 dev_dbg(&port->dev, "%s - write error\n", __func__);
 546         return status;
 547 }
 548
 549 static int iuu_uart_flush(struct usb_serial_port *port)
 550 {
 551         struct device *dev = &port->dev;
 552         int i;
 553         int status;
 554         u8 *rxcmd;
 555         struct iuu_private *priv = usb_get_serial_port_data(port);
 556
 557         if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
 558                 return -EIO;
 559
 560         rxcmd = kmalloc(1, GFP_KERNEL);
 561         if (!rxcmd)
 562                 return -ENOMEM;
 563
 564         rxcmd[0] = IUU_UART_RX;
 565
 566         for (i = 0; i < 2; i++) {
 567                 status = bulk_immediate(port, rxcmd, 1);
 568                 if (status != IUU_OPERATION_OK) {
 569                         dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
 570                         goto out_free;
 571                 }
 572
 573                 status = read_immediate(port, &priv->len, 1);
 574                 if (status != IUU_OPERATION_OK) {
 575                         dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 576                         goto out_free;
 577                 }
 578
 579                 if (priv->len > 0) {
 580                         dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
 581                         status = read_immediate(port, priv->buf, priv->len);
 582                         if (status != IUU_OPERATION_OK) {
 583                                 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 584                                 goto out_free;
 585                         }
 586                 }
 587         }
 588         dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
 589         iuu_led(port, 0, 0xF000, 0, 0xFF);
 590
 591 out_free:
 592         kfree(rxcmd);
 593
 594         return status;
 595 }
 596
 597 static void read_buf_callback(struct urb *urb)
 598 {
 599         struct usb_serial_port *port = urb->context;
 600         unsigned char *data = urb->transfer_buffer;
 601         int status = urb->status;
 602
 603         if (status) {
 604                 if (status == -EPROTO) {
 605                         /* reschedule needed */
 606                 }
 607                 return;
 608         }
 609
 610         dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
 611         if (data == NULL)
 612                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 613         if (urb->actual_length && data) {
 614                 tty_insert_flip_string(&port->port, data, urb->actual_length);
 615                 tty_flip_buffer_push(&port->port);
 616         }
 617         iuu_led_activity_on(urb);
 618 }
 619
 620 static int iuu_bulk_write(struct usb_serial_port *port)
 621 {
 622         struct iuu_private *priv = usb_get_serial_port_data(port);
 623         unsigned long flags;
 624         int result;
 625         int buf_len;
 626         char *buf_ptr = port->write_urb->transfer_buffer;
 627
 628         spin_lock_irqsave(&priv->lock, flags);
 629         *buf_ptr++ = IUU_UART_ESC;
 630         *buf_ptr++ = IUU_UART_TX;
 631         *buf_ptr++ = priv->writelen;
 632
 633         memcpy(buf_ptr, priv->writebuf, priv->writelen);
 634         buf_len = priv->writelen;
 635         priv->writelen = 0;
 636         spin_unlock_irqrestore(&priv->lock, flags);
 637         dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
 638                 buf_len, buf_len, buf_ptr);
 639         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 640                           usb_sndbulkpipe(port->serial->dev,
 641                                           port->bulk_out_endpointAddress),
 642                           port->write_urb->transfer_buffer, buf_len + 3,
 643                           iuu_rxcmd, port);
 644         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 645         usb_serial_port_softint(port);
 646         return result;
 647 }
 648
 649 static int iuu_read_buf(struct usb_serial_port *port, int len)
 650 {
 651         int result;
 652
 653         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 654                           usb_rcvbulkpipe(port->serial->dev,
 655                                           port->bulk_in_endpointAddress),
 656                           port->read_urb->transfer_buffer, len,
 657                           read_buf_callback, port);
 658         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 659         return result;
 660 }
 661
 662 static void iuu_uart_read_callback(struct urb *urb)
 663 {
 664         struct usb_serial_port *port = urb->context;
 665         struct iuu_private *priv = usb_get_serial_port_data(port);
 666         unsigned long flags;
 667         int status = urb->status;
 668         int error = 0;
 669         int len = 0;
 670         unsigned char *data = urb->transfer_buffer;
 671         priv->poll++;
 672
 673         if (status) {
 674                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 675                 /* error stop all */
 676                 return;
 677         }
 678         if (data == NULL)
 679                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 680
 681         if (urb->actual_length == 1  && data != NULL)
 682                 len = (int) data[0];
 683
 684         if (urb->actual_length > 1) {
 685                 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
 686                     urb->actual_length);
 687                 error = 1;
 688                 return;
 689         }
 690         /* if len > 0 call readbuf */
 691
 692         if (len > 0 && error == 0) {
 693                 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
 694                         __func__, len);
 695                 status = iuu_read_buf(port, len);
 696                 return;
 697         }
 698         /* need to update status  ? */
 699         if (priv->poll > 99) {
 700                 status = iuu_status(port);
 701                 priv->poll = 0;
 702                 return;
 703         }
 704
 705         /* reset waiting ? */
 706
 707         if (priv->reset == 1) {
 708                 status = iuu_reset(port, 0xC);
 709                 return;
 710         }
 711         /* Writebuf is waiting */
 712         spin_lock_irqsave(&priv->lock, flags);
 713         if (priv->writelen > 0) {
 714                 spin_unlock_irqrestore(&priv->lock, flags);
 715                 status = iuu_bulk_write(port);
 716                 return;
 717         }
 718         spin_unlock_irqrestore(&priv->lock, flags);
 719         /* if nothing to write call again rxcmd */
 720         dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
 721         iuu_led_activity_off(urb);
 722 }
 723
 724 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
 725                           const u8 *buf, int count)
 726 {
 727         struct iuu_private *priv = usb_get_serial_port_data(port);
 728         unsigned long flags;
 729
 730         spin_lock_irqsave(&priv->lock, flags);
 731
 732         count = min(count, 256 - priv->writelen);
 733         if (count == 0)
 734                 goto out;
 735
 736         /* fill the buffer */
 737         memcpy(priv->writebuf + priv->writelen, buf, count);
 738         priv->writelen += count;
 739 out:
 740         spin_unlock_irqrestore(&priv->lock, flags);
 741
 742         return count;
 743 }
 744
 745 static void read_rxcmd_callback(struct urb *urb)
 746 {
 747         struct usb_serial_port *port = urb->context;
 748         int result;
 749         int status = urb->status;
 750
 751         if (status) {
 752                 /* error stop all */
 753                 return;
 754         }
 755
 756         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 757                           usb_rcvbulkpipe(port->serial->dev,
 758                                           port->bulk_in_endpointAddress),
 759                           port->read_urb->transfer_buffer, 256,
 760                           iuu_uart_read_callback, port);
 761         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 762         dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
 763 }
 764
 765 static int iuu_uart_on(struct usb_serial_port *port)
 766 {
 767         int status;
 768         u8 *buf;
 769
 770         buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
 771
 772         if (!buf)
 773                 return -ENOMEM;
 774
 775         buf[0] = IUU_UART_ENABLE;
 776         buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
 777         buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
 778         buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
 779
 780         status = bulk_immediate(port, buf, 4);
 781         if (status != IUU_OPERATION_OK) {
 782                 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
 783                 goto uart_enable_failed;
 784         }
 785         /*  iuu_reset() the card after iuu_uart_on() */
 786         status = iuu_uart_flush(port);
 787         if (status != IUU_OPERATION_OK)
 788                 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
 789 uart_enable_failed:
 790         kfree(buf);
 791         return status;
 792 }
 793
 794 /*  Disables the IUU UART (a.k.a. the Phoenix voiderface) */
 795 static int iuu_uart_off(struct usb_serial_port *port)
 796 {
 797         int status;
 798         u8 *buf;
 799         buf = kmalloc(1, GFP_KERNEL);
 800         if (!buf)
 801                 return -ENOMEM;
 802         buf[0] = IUU_UART_DISABLE;
 803
 804         status = bulk_immediate(port, buf, 1);
 805         if (status != IUU_OPERATION_OK)
 806                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 807
 808         kfree(buf);
 809         return status;
 810 }
 811
 812 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 813                          u32 *actual, u8 parity)
 814 {
 815         int status;
 816         u32 baud;
 817         u8 *dataout;
 818         u8 DataCount = 0;
 819         u8 T1Frekvens = 0;
 820         u8 T1reload = 0;
 821         unsigned int T1FrekvensHZ = 0;
 822
 823         dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
 824         dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
 825
 826         if (!dataout)
 827                 return -ENOMEM;
 828         /*baud = (((priv->clk / 35) * baud_base) / 100000); */
 829         baud = baud_base;
 830
 831         if (baud < 1200 || baud > 230400) {
 832                 kfree(dataout);
 833                 return IUU_INVALID_PARAMETER;
 834         }
 835         if (baud > 977) {
 836                 T1Frekvens = 3;
 837                 T1FrekvensHZ = 500000;
 838         }
 839
 840         if (baud > 3906) {
 841                 T1Frekvens = 2;
 842                 T1FrekvensHZ = 2000000;
 843         }
 844
 845         if (baud > 11718) {
 846                 T1Frekvens = 1;
 847                 T1FrekvensHZ = 6000000;
 848         }
 849
 850         if (baud > 46875) {
 851                 T1Frekvens = 0;
 852                 T1FrekvensHZ = 24000000;
 853         }
 854
 855         T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
 856
 857         /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
 858         dataout[DataCount++] = IUU_UART_ESC;
 859         /*  magic number here:  CHANGE_BAUD; */
 860         dataout[DataCount++] = IUU_UART_CHANGE;
 861         dataout[DataCount++] = T1Frekvens;
 862         dataout[DataCount++] = T1reload;
 863
 864         *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
 865
 866         switch (parity & 0x0F) {
 867         case IUU_PARITY_NONE:
 868                 dataout[DataCount++] = 0x00;
 869                 break;
 870         case IUU_PARITY_EVEN:
 871                 dataout[DataCount++] = 0x01;
 872                 break;
 873         case IUU_PARITY_ODD:
 874                 dataout[DataCount++] = 0x02;
 875                 break;
 876         case IUU_PARITY_MARK:
 877                 dataout[DataCount++] = 0x03;
 878                 break;
 879         case IUU_PARITY_SPACE:
 880                 dataout[DataCount++] = 0x04;
 881                 break;
 882         default:
 883                 kfree(dataout);
 884                 return IUU_INVALID_PARAMETER;
 885                 break;
 886         }
 887
 888         switch (parity & 0xF0) {
 889         case IUU_ONE_STOP_BIT:
 890                 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
 891                 break;
 892
 893         case IUU_TWO_STOP_BITS:
 894                 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 895                 break;
 896         default:
 897                 kfree(dataout);
 898                 return IUU_INVALID_PARAMETER;
 899                 break;
 900         }
 901
 902         status = bulk_immediate(port, dataout, DataCount);
 903         if (status != IUU_OPERATION_OK)
 904                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 905         kfree(dataout);
 906         return status;
 907 }
 908
 909 static void iuu_set_termios(struct tty_struct *tty,
 910                 struct usb_serial_port *port, struct ktermios *old_termios)
 911 {
 912         const u32 supported_mask = CMSPAR|PARENB|PARODD;
 913         struct iuu_private *priv = usb_get_serial_port_data(port);
 914         unsigned int cflag = tty->termios.c_cflag;
 915         int status;
 916         u32 actual;
 917         u32 parity;
 918         int csize = CS7;
 919         int baud;
 920         u32 newval = cflag & supported_mask;
 921
 922         /* Just use the ospeed. ispeed should be the same. */
 923         baud = tty->termios.c_ospeed;
 924
 925         dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
 926
 927         /* compute the parity parameter */
 928         parity = 0;
 929         if (cflag & CMSPAR) {   /* Using mark space */
 930                 if (cflag & PARODD)
 931                         parity |= IUU_PARITY_SPACE;
 932                 else
 933                         parity |= IUU_PARITY_MARK;
 934         } else if (!(cflag & PARENB)) {
 935                 parity |= IUU_PARITY_NONE;
 936                 csize = CS8;
 937         } else if (cflag & PARODD)
 938                 parity |= IUU_PARITY_ODD;
 939         else
 940                 parity |= IUU_PARITY_EVEN;
 941
 942         parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
 943
 944         /* set it */
 945         status = iuu_uart_baud(port,
 946                         baud * priv->boost / 100,
 947                         &actual, parity);
 948
 949         /* set the termios value to the real one, so the user now what has
 950          * changed. We support few fields so its easies to copy the old hw
 951          * settings back over and then adjust them
 952          */
 953         if (old_termios)
 954                 tty_termios_copy_hw(&tty->termios, old_termios);
 955         if (status != 0)        /* Set failed - return old bits */
 956                 return;
 957         /* Re-encode speed, parity and csize */
 958         tty_encode_baud_rate(tty, baud, baud);
 959         tty->termios.c_cflag &= ~(supported_mask|CSIZE);
 960         tty->termios.c_cflag |= newval | csize;
 961 }
 962
 963 static void iuu_close(struct usb_serial_port *port)
 964 {
 965         /* iuu_led (port,255,0,0,0); */
 966
 967         iuu_uart_off(port);
 968
 969         usb_kill_urb(port->write_urb);
 970         usb_kill_urb(port->read_urb);
 971
 972         iuu_led(port, 0, 0, 0xF000, 0xFF);
 973 }
 974
 975 static void iuu_init_termios(struct tty_struct *tty)
 976 {
 977         tty->termios = tty_std_termios;
 978         tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
 979                                 | TIOCM_CTS | CSTOPB | PARENB;
 980         tty->termios.c_ispeed = 9600;
 981         tty->termios.c_ospeed = 9600;
 982         tty->termios.c_lflag = 0;
 983         tty->termios.c_oflag = 0;
 984         tty->termios.c_iflag = 0;
 985 }
 986
 987 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 988 {
 989         struct usb_serial *serial = port->serial;
 990         struct device *dev = &port->dev;
 991         u8 *buf;
 992         int result;
 993         int baud;
 994         u32 actual;
 995         struct iuu_private *priv = usb_get_serial_port_data(port);
 996
 997         baud = tty->termios.c_ospeed;
 998         tty->termios.c_ispeed = baud;
 999         /* Re-encode speed */
1000         tty_encode_baud_rate(tty, baud, baud);
1001
1002         dev_dbg(dev, "%s - baud %d\n", __func__, baud);
1003         usb_clear_halt(serial->dev, port->write_urb->pipe);
1004         usb_clear_halt(serial->dev, port->read_urb->pipe);
1005
1006         buf = kmalloc(10, GFP_KERNEL);
1007         if (buf == NULL)
1008                 return -ENOMEM;
1009
1010         priv->poll = 0;
1011
1012         /* initialize writebuf */
1013 #define FISH(a, b, c, d) do { \
1014         result = usb_control_msg(port->serial->dev,     \
1015                                 usb_rcvctrlpipe(port->serial->dev, 0),  \
1016                                 b, a, c, d, buf, 1, 1000); \
1017         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n", a, b, c, d, result, \
1018                                 buf[0]); } while (0);
1019
1020 #define SOUP(a, b, c, d)  do { \
1021         result = usb_control_msg(port->serial->dev,     \
1022                                 usb_sndctrlpipe(port->serial->dev, 0),  \
1023                                 b, a, c, d, NULL, 0, 1000); \
1024         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d\n", a, b, c, d, result); } while (0)
1025
1026         /*  This is not UART related but IUU USB driver related or something */
1027         /*  like that. Basically no IUU will accept any commands from the USB */
1028         /*  host unless it has received the following message */
1029         /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1030
1031         SOUP(0x03, 0x02, 0x02, 0x0);
1032         kfree(buf);
1033         iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1034         iuu_uart_on(port);
1035         if (boost < 100)
1036                 boost = 100;
1037         priv->boost = boost;
1038         priv->baud = baud;
1039         switch (clockmode) {
1040         case 2:         /*  3.680 Mhz */
1041                 priv->clk = IUU_CLK_3680000;
1042                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1043                 result =
1044                     iuu_uart_baud(port, baud * boost / 100, &actual,
1045                                   IUU_PARITY_EVEN);
1046                 break;
1047         case 3:         /*  6.00 Mhz */
1048                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1049                 priv->clk = IUU_CLK_6000000;
1050                 /* Ratio of 6000000 to 3500000 for baud 9600 */
1051                 result =
1052                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
1053                                   IUU_PARITY_EVEN);
1054                 break;
1055         default:                /*  3.579 Mhz */
1056                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1057                 priv->clk = IUU_CLK_3579000;
1058                 result =
1059                     iuu_uart_baud(port, baud * boost / 100, &actual,
1060                                   IUU_PARITY_EVEN);
1061         }
1062
1063         /* set the cardin cardout signals */
1064         switch (cdmode) {
1065         case 0:
1066                 iuu_cardin = 0;
1067                 iuu_cardout = 0;
1068                 break;
1069         case 1:
1070                 iuu_cardin = TIOCM_CD;
1071                 iuu_cardout =  0;
1072                 break;
1073         case 2:
1074                 iuu_cardin = 0;
1075                 iuu_cardout = TIOCM_CD;
1076                 break;
1077         case 3:
1078                 iuu_cardin = TIOCM_DSR;
1079                 iuu_cardout = 0;
1080                 break;
1081         case 4:
1082                 iuu_cardin = 0;
1083                 iuu_cardout = TIOCM_DSR;
1084                 break;
1085         case 5:
1086                 iuu_cardin = TIOCM_CTS;
1087                 iuu_cardout = 0;
1088                 break;
1089         case 6:
1090                 iuu_cardin = 0;
1091                 iuu_cardout = TIOCM_CTS;
1092                 break;
1093         case 7:
1094                 iuu_cardin = TIOCM_RNG;
1095                 iuu_cardout = 0;
1096                 break;
1097         case 8:
1098                 iuu_cardin = 0;
1099                 iuu_cardout = TIOCM_RNG;
1100         }
1101
1102         iuu_uart_flush(port);
1103
1104         dev_dbg(dev, "%s - initialization done\n", __func__);
1105
1106         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1107         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1108                           usb_sndbulkpipe(port->serial->dev,
1109                                           port->bulk_out_endpointAddress),
1110                           port->write_urb->transfer_buffer, 1,
1111                           read_rxcmd_callback, port);
1112         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1113         if (result) {
1114                 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1115                 iuu_close(port);
1116         } else {
1117                 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1118         }
1119
1120         return result;
1121 }
1122
1123 /* how to change VCC */
1124 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1125 {
1126         int status;
1127         u8 *buf;
1128
1129         buf = kmalloc(5, GFP_KERNEL);
1130         if (!buf)
1131                 return -ENOMEM;
1132
1133         buf[0] = IUU_SET_VCC;
1134         buf[1] = vcc & 0xFF;
1135         buf[2] = (vcc >> 8) & 0xFF;
1136         buf[3] = (vcc >> 16) & 0xFF;
1137         buf[4] = (vcc >> 24) & 0xFF;
1138
1139         status = bulk_immediate(port, buf, 5);
1140         kfree(buf);
1141
1142         if (status != IUU_OPERATION_OK)
1143                 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1144         else
1145                 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1146
1147         return status;
1148 }
1149
1150 /*
1151  * Sysfs Attributes
1152  */
1153
1154 static ssize_t vcc_mode_show(struct device *dev,
1155         struct device_attribute *attr, char *buf)
1156 {
1157         struct usb_serial_port *port = to_usb_serial_port(dev);
1158         struct iuu_private *priv = usb_get_serial_port_data(port);
1159
1160         return sprintf(buf, "%d\n", priv->vcc);
1161 }
1162
1163 static ssize_t vcc_mode_store(struct device *dev,
1164         struct device_attribute *attr, const char *buf, size_t count)
1165 {
1166         struct usb_serial_port *port = to_usb_serial_port(dev);
1167         struct iuu_private *priv = usb_get_serial_port_data(port);
1168         unsigned long v;
1169
1170         if (kstrtoul(buf, 10, &v)) {
1171                 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1172                                 __func__, buf);
1173                 goto fail_store_vcc_mode;
1174         }
1175
1176         dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1177
1178         if ((v != 3) && (v != 5)) {
1179                 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1180         } else {
1181                 iuu_vcc_set(port, v);
1182                 priv->vcc = v;
1183         }
1184 fail_store_vcc_mode:
1185         return count;
1186 }
1187 static DEVICE_ATTR_RW(vcc_mode);
1188
1189 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1190 {
1191         return device_create_file(&port->dev, &dev_attr_vcc_mode);
1192 }
1193
1194 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1195 {
1196         device_remove_file(&port->dev, &dev_attr_vcc_mode);
1197         return 0;
1198 }
1199
1200 /*
1201  * End Sysfs Attributes
1202  */
1203
1204 static struct usb_serial_driver iuu_device = {
1205         .driver = {
1206                    .owner = THIS_MODULE,
1207                    .name = "iuu_phoenix",
1208                    },
1209         .id_table = id_table,
1210         .num_ports = 1,
1211         .bulk_in_size = 512,
1212         .bulk_out_size = 512,
1213         .open = iuu_open,
1214         .close = iuu_close,
1215         .write = iuu_uart_write,
1216         .read_bulk_callback = iuu_uart_read_callback,
1217         .tiocmget = iuu_tiocmget,
1218         .tiocmset = iuu_tiocmset,
1219         .set_termios = iuu_set_termios,
1220         .init_termios = iuu_init_termios,
1221         .attach = iuu_attach,
1222         .port_probe = iuu_port_probe,
1223         .port_remove = iuu_port_remove,
1224 };
1225
1226 static struct usb_serial_driver * const serial_drivers[] = {
1227         &iuu_device, NULL
1228 };
1229
1230 module_usb_serial_driver(serial_drivers, id_table);
1231
1232 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1233
1234 MODULE_DESCRIPTION(DRIVER_DESC);
1235 MODULE_LICENSE("GPL");
1236
1237 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1238 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1239
1240 module_param(boost, int, S_IRUGO | S_IWUSR);
1241 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1242
1243 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1244 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1245                 "3=6 Mhz)");
1246
1247 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1248 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1249                  "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1250
1251 module_param(vcc_default, int, S_IRUGO | S_IWUSR);
1252 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1253                 "for 5V). Default to 5.");