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
 373         if (xmas) {
 374                 buf_ptr[0] = IUU_SET_LED;
 375                 get_random_bytes(buf_ptr + 1, 6);
 376                 buf_ptr[7] = 1;
 377         } else {
 378                 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
 379         }
 380
 381         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 382                           usb_sndbulkpipe(port->serial->dev,
 383                                           port->bulk_out_endpointAddress),
 384                           port->write_urb->transfer_buffer, 8 ,
 385                           iuu_rxcmd, port);
 386         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 387 }
 388
 389 static void iuu_led_activity_off(struct urb *urb)
 390 {
 391         struct usb_serial_port *port = urb->context;
 392         int result;
 393         char *buf_ptr = port->write_urb->transfer_buffer;
 394
 395         if (xmas) {
 396                 iuu_rxcmd(urb);
 397                 return;
 398         }
 399
 400         iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
 401
 402         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 403                           usb_sndbulkpipe(port->serial->dev,
 404                                           port->bulk_out_endpointAddress),
 405                           port->write_urb->transfer_buffer, 8 ,
 406                           iuu_rxcmd, port);
 407         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 408 }
 409
 410
 411
 412 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
 413 {
 414         int status;
 415         struct iuu_private *priv = usb_get_serial_port_data(port);
 416         int Count = 0;
 417         u8 FrqGenAdr = 0x69;
 418         u8 DIV = 0;             /* 8bit */
 419         u8 XDRV = 0;            /* 8bit */
 420         u8 PUMP = 0;            /* 3bit */
 421         u8 PBmsb = 0;           /* 2bit */
 422         u8 PBlsb = 0;           /* 8bit */
 423         u8 PO = 0;              /* 1bit */
 424         u8 Q = 0;               /* 7bit */
 425         /* 24bit = 3bytes */
 426         unsigned int P = 0;
 427         unsigned int P2 = 0;
 428         int frq = (int)dwFrq;
 429
 430         if (frq == 0) {
 431                 priv->buf[Count++] = IUU_UART_WRITE_I2C;
 432                 priv->buf[Count++] = FrqGenAdr << 1;
 433                 priv->buf[Count++] = 0x09;
 434                 priv->buf[Count++] = 0x00;
 435
 436                 status = bulk_immediate(port, (u8 *) priv->buf, Count);
 437                 if (status != 0) {
 438                         dev_dbg(&port->dev, "%s - write error\n", __func__);
 439                         return status;
 440                 }
 441         } else if (frq == 3579000) {
 442                 DIV = 100;
 443                 P = 1193;
 444                 Q = 40;
 445                 XDRV = 0;
 446         } else if (frq == 3680000) {
 447                 DIV = 105;
 448                 P = 161;
 449                 Q = 5;
 450                 XDRV = 0;
 451         } else if (frq == 6000000) {
 452                 DIV = 66;
 453                 P = 66;
 454                 Q = 2;
 455                 XDRV = 0x28;
 456         } else {
 457                 unsigned int result = 0;
 458                 unsigned int tmp = 0;
 459                 unsigned int check;
 460                 unsigned int check2;
 461                 char found = 0x00;
 462                 unsigned int lQ = 2;
 463                 unsigned int lP = 2055;
 464                 unsigned int lDiv = 4;
 465
 466                 for (lQ = 2; lQ <= 47 && !found; lQ++)
 467                         for (lP = 2055; lP >= 8 && !found; lP--)
 468                                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
 469                                         tmp = (12000000 / lDiv) * (lP / lQ);
 470                                         if (abs((int)(tmp - frq)) <
 471                                             abs((int)(frq - result))) {
 472                                                 check2 = (12000000 / lQ);
 473                                                 if (check2 < 250000)
 474                                                         continue;
 475                                                 check = (12000000 / lQ) * lP;
 476                                                 if (check > 400000000)
 477                                                         continue;
 478                                                 if (check < 100000000)
 479                                                         continue;
 480                                                 if (lDiv < 4 || lDiv > 127)
 481                                                         continue;
 482                                                 result = tmp;
 483                                                 P = lP;
 484                                                 DIV = lDiv;
 485                                                 Q = lQ;
 486                                                 if (result == frq)
 487                                                         found = 0x01;
 488                                         }
 489                                 }
 490         }
 491         P2 = ((P - PO) / 2) - 4;
 492         DIV = DIV;
 493         PUMP = 0x04;
 494         PBmsb = (P2 >> 8 & 0x03);
 495         PBlsb = P2 & 0xFF;
 496         PO = (P >> 10) & 0x01;
 497         Q = Q - 2;
 498
 499         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 500         priv->buf[Count++] = FrqGenAdr << 1;
 501         priv->buf[Count++] = 0x09;
 502         priv->buf[Count++] = 0x20;      /* Adr = 0x09 */
 503         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 504         priv->buf[Count++] = FrqGenAdr << 1;
 505         priv->buf[Count++] = 0x0C;
 506         priv->buf[Count++] = DIV;       /* Adr = 0x0C */
 507         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 508         priv->buf[Count++] = FrqGenAdr << 1;
 509         priv->buf[Count++] = 0x12;
 510         priv->buf[Count++] = XDRV;      /* Adr = 0x12 */
 511         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 512         priv->buf[Count++] = FrqGenAdr << 1;
 513         priv->buf[Count++] = 0x13;
 514         priv->buf[Count++] = 0x6B;      /* Adr = 0x13 */
 515         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 516         priv->buf[Count++] = FrqGenAdr << 1;
 517         priv->buf[Count++] = 0x40;
 518         priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
 519                              (PBmsb & 0x03);    /* Adr = 0x40 */
 520         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 521         priv->buf[Count++] = FrqGenAdr << 1;
 522         priv->buf[Count++] = 0x41;
 523         priv->buf[Count++] = PBlsb;     /* Adr = 0x41 */
 524         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 525         priv->buf[Count++] = FrqGenAdr << 1;
 526         priv->buf[Count++] = 0x42;
 527         priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
 528         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 529         priv->buf[Count++] = FrqGenAdr << 1;
 530         priv->buf[Count++] = 0x44;
 531         priv->buf[Count++] = (char)0xFF;        /* Adr = 0x44 */
 532         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 533         priv->buf[Count++] = FrqGenAdr << 1;
 534         priv->buf[Count++] = 0x45;
 535         priv->buf[Count++] = (char)0xFE;        /* Adr = 0x45 */
 536         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 537         priv->buf[Count++] = FrqGenAdr << 1;
 538         priv->buf[Count++] = 0x46;
 539         priv->buf[Count++] = 0x7F;      /* Adr = 0x46 */
 540         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 541         priv->buf[Count++] = FrqGenAdr << 1;
 542         priv->buf[Count++] = 0x47;
 543         priv->buf[Count++] = (char)0x84;        /* Adr = 0x47 */
 544
 545         status = bulk_immediate(port, (u8 *) priv->buf, Count);
 546         if (status != IUU_OPERATION_OK)
 547                 dev_dbg(&port->dev, "%s - write error\n", __func__);
 548         return status;
 549 }
 550
 551 static int iuu_uart_flush(struct usb_serial_port *port)
 552 {
 553         struct device *dev = &port->dev;
 554         int i;
 555         int status;
 556         u8 *rxcmd;
 557         struct iuu_private *priv = usb_get_serial_port_data(port);
 558
 559         if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
 560                 return -EIO;
 561
 562         rxcmd = kmalloc(1, GFP_KERNEL);
 563         if (!rxcmd)
 564                 return -ENOMEM;
 565
 566         rxcmd[0] = IUU_UART_RX;
 567
 568         for (i = 0; i < 2; i++) {
 569                 status = bulk_immediate(port, rxcmd, 1);
 570                 if (status != IUU_OPERATION_OK) {
 571                         dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
 572                         goto out_free;
 573                 }
 574
 575                 status = read_immediate(port, &priv->len, 1);
 576                 if (status != IUU_OPERATION_OK) {
 577                         dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 578                         goto out_free;
 579                 }
 580
 581                 if (priv->len > 0) {
 582                         dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
 583                         status = read_immediate(port, priv->buf, priv->len);
 584                         if (status != IUU_OPERATION_OK) {
 585                                 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 586                                 goto out_free;
 587                         }
 588                 }
 589         }
 590         dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
 591         iuu_led(port, 0, 0xF000, 0, 0xFF);
 592
 593 out_free:
 594         kfree(rxcmd);
 595
 596         return status;
 597 }
 598
 599 static void read_buf_callback(struct urb *urb)
 600 {
 601         struct usb_serial_port *port = urb->context;
 602         unsigned char *data = urb->transfer_buffer;
 603         int status = urb->status;
 604
 605         if (status) {
 606                 if (status == -EPROTO) {
 607                         /* reschedule needed */
 608                 }
 609                 return;
 610         }
 611
 612         dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
 613         if (data == NULL)
 614                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 615         if (urb->actual_length && data) {
 616                 tty_insert_flip_string(&port->port, data, urb->actual_length);
 617                 tty_flip_buffer_push(&port->port);
 618         }
 619         iuu_led_activity_on(urb);
 620 }
 621
 622 static int iuu_bulk_write(struct usb_serial_port *port)
 623 {
 624         struct iuu_private *priv = usb_get_serial_port_data(port);
 625         unsigned long flags;
 626         int result;
 627         int buf_len;
 628         char *buf_ptr = port->write_urb->transfer_buffer;
 629
 630         spin_lock_irqsave(&priv->lock, flags);
 631         *buf_ptr++ = IUU_UART_ESC;
 632         *buf_ptr++ = IUU_UART_TX;
 633         *buf_ptr++ = priv->writelen;
 634
 635         memcpy(buf_ptr, priv->writebuf, priv->writelen);
 636         buf_len = priv->writelen;
 637         priv->writelen = 0;
 638         spin_unlock_irqrestore(&priv->lock, flags);
 639         dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
 640                 buf_len, buf_len, buf_ptr);
 641         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 642                           usb_sndbulkpipe(port->serial->dev,
 643                                           port->bulk_out_endpointAddress),
 644                           port->write_urb->transfer_buffer, buf_len + 3,
 645                           iuu_rxcmd, port);
 646         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 647         usb_serial_port_softint(port);
 648         return result;
 649 }
 650
 651 static int iuu_read_buf(struct usb_serial_port *port, int len)
 652 {
 653         int result;
 654
 655         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 656                           usb_rcvbulkpipe(port->serial->dev,
 657                                           port->bulk_in_endpointAddress),
 658                           port->read_urb->transfer_buffer, len,
 659                           read_buf_callback, port);
 660         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 661         return result;
 662 }
 663
 664 static void iuu_uart_read_callback(struct urb *urb)
 665 {
 666         struct usb_serial_port *port = urb->context;
 667         struct iuu_private *priv = usb_get_serial_port_data(port);
 668         unsigned long flags;
 669         int status = urb->status;
 670         int error = 0;
 671         int len = 0;
 672         unsigned char *data = urb->transfer_buffer;
 673         priv->poll++;
 674
 675         if (status) {
 676                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 677                 /* error stop all */
 678                 return;
 679         }
 680         if (data == NULL)
 681                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 682
 683         if (urb->actual_length == 1  && data != NULL)
 684                 len = (int) data[0];
 685
 686         if (urb->actual_length > 1) {
 687                 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
 688                     urb->actual_length);
 689                 error = 1;
 690                 return;
 691         }
 692         /* if len > 0 call readbuf */
 693
 694         if (len > 0 && error == 0) {
 695                 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
 696                         __func__, len);
 697                 status = iuu_read_buf(port, len);
 698                 return;
 699         }
 700         /* need to update status  ? */
 701         if (priv->poll > 99) {
 702                 status = iuu_status(port);
 703                 priv->poll = 0;
 704                 return;
 705         }
 706
 707         /* reset waiting ? */
 708
 709         if (priv->reset == 1) {
 710                 status = iuu_reset(port, 0xC);
 711                 return;
 712         }
 713         /* Writebuf is waiting */
 714         spin_lock_irqsave(&priv->lock, flags);
 715         if (priv->writelen > 0) {
 716                 spin_unlock_irqrestore(&priv->lock, flags);
 717                 status = iuu_bulk_write(port);
 718                 return;
 719         }
 720         spin_unlock_irqrestore(&priv->lock, flags);
 721         /* if nothing to write call again rxcmd */
 722         dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
 723         iuu_led_activity_off(urb);
 724 }
 725
 726 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
 727                           const u8 *buf, int count)
 728 {
 729         struct iuu_private *priv = usb_get_serial_port_data(port);
 730         unsigned long flags;
 731
 732         spin_lock_irqsave(&priv->lock, flags);
 733
 734         count = min(count, 256 - priv->writelen);
 735         if (count == 0)
 736                 goto out;
 737
 738         /* fill the buffer */
 739         memcpy(priv->writebuf + priv->writelen, buf, count);
 740         priv->writelen += count;
 741 out:
 742         spin_unlock_irqrestore(&priv->lock, flags);
 743
 744         return count;
 745 }
 746
 747 static void read_rxcmd_callback(struct urb *urb)
 748 {
 749         struct usb_serial_port *port = urb->context;
 750         int result;
 751         int status = urb->status;
 752
 753         if (status) {
 754                 /* error stop all */
 755                 return;
 756         }
 757
 758         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 759                           usb_rcvbulkpipe(port->serial->dev,
 760                                           port->bulk_in_endpointAddress),
 761                           port->read_urb->transfer_buffer, 256,
 762                           iuu_uart_read_callback, port);
 763         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 764         dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
 765 }
 766
 767 static int iuu_uart_on(struct usb_serial_port *port)
 768 {
 769         int status;
 770         u8 *buf;
 771
 772         buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
 773
 774         if (!buf)
 775                 return -ENOMEM;
 776
 777         buf[0] = IUU_UART_ENABLE;
 778         buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
 779         buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
 780         buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
 781
 782         status = bulk_immediate(port, buf, 4);
 783         if (status != IUU_OPERATION_OK) {
 784                 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
 785                 goto uart_enable_failed;
 786         }
 787         /*  iuu_reset() the card after iuu_uart_on() */
 788         status = iuu_uart_flush(port);
 789         if (status != IUU_OPERATION_OK)
 790                 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
 791 uart_enable_failed:
 792         kfree(buf);
 793         return status;
 794 }
 795
 796 /*  Disables the IUU UART (a.k.a. the Phoenix voiderface) */
 797 static int iuu_uart_off(struct usb_serial_port *port)
 798 {
 799         int status;
 800         u8 *buf;
 801         buf = kmalloc(1, GFP_KERNEL);
 802         if (!buf)
 803                 return -ENOMEM;
 804         buf[0] = IUU_UART_DISABLE;
 805
 806         status = bulk_immediate(port, buf, 1);
 807         if (status != IUU_OPERATION_OK)
 808                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 809
 810         kfree(buf);
 811         return status;
 812 }
 813
 814 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 815                          u32 *actual, u8 parity)
 816 {
 817         int status;
 818         u32 baud;
 819         u8 *dataout;
 820         u8 DataCount = 0;
 821         u8 T1Frekvens = 0;
 822         u8 T1reload = 0;
 823         unsigned int T1FrekvensHZ = 0;
 824
 825         dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
 826         dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
 827
 828         if (!dataout)
 829                 return -ENOMEM;
 830         /*baud = (((priv->clk / 35) * baud_base) / 100000); */
 831         baud = baud_base;
 832
 833         if (baud < 1200 || baud > 230400) {
 834                 kfree(dataout);
 835                 return IUU_INVALID_PARAMETER;
 836         }
 837         if (baud > 977) {
 838                 T1Frekvens = 3;
 839                 T1FrekvensHZ = 500000;
 840         }
 841
 842         if (baud > 3906) {
 843                 T1Frekvens = 2;
 844                 T1FrekvensHZ = 2000000;
 845         }
 846
 847         if (baud > 11718) {
 848                 T1Frekvens = 1;
 849                 T1FrekvensHZ = 6000000;
 850         }
 851
 852         if (baud > 46875) {
 853                 T1Frekvens = 0;
 854                 T1FrekvensHZ = 24000000;
 855         }
 856
 857         T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
 858
 859         /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
 860         dataout[DataCount++] = IUU_UART_ESC;
 861         /*  magic number here:  CHANGE_BAUD; */
 862         dataout[DataCount++] = IUU_UART_CHANGE;
 863         dataout[DataCount++] = T1Frekvens;
 864         dataout[DataCount++] = T1reload;
 865
 866         *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
 867
 868         switch (parity & 0x0F) {
 869         case IUU_PARITY_NONE:
 870                 dataout[DataCount++] = 0x00;
 871                 break;
 872         case IUU_PARITY_EVEN:
 873                 dataout[DataCount++] = 0x01;
 874                 break;
 875         case IUU_PARITY_ODD:
 876                 dataout[DataCount++] = 0x02;
 877                 break;
 878         case IUU_PARITY_MARK:
 879                 dataout[DataCount++] = 0x03;
 880                 break;
 881         case IUU_PARITY_SPACE:
 882                 dataout[DataCount++] = 0x04;
 883                 break;
 884         default:
 885                 kfree(dataout);
 886                 return IUU_INVALID_PARAMETER;
 887                 break;
 888         }
 889
 890         switch (parity & 0xF0) {
 891         case IUU_ONE_STOP_BIT:
 892                 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
 893                 break;
 894
 895         case IUU_TWO_STOP_BITS:
 896                 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 897                 break;
 898         default:
 899                 kfree(dataout);
 900                 return IUU_INVALID_PARAMETER;
 901                 break;
 902         }
 903
 904         status = bulk_immediate(port, dataout, DataCount);
 905         if (status != IUU_OPERATION_OK)
 906                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 907         kfree(dataout);
 908         return status;
 909 }
 910
 911 static void iuu_set_termios(struct tty_struct *tty,
 912                 struct usb_serial_port *port, struct ktermios *old_termios)
 913 {
 914         const u32 supported_mask = CMSPAR|PARENB|PARODD;
 915         struct iuu_private *priv = usb_get_serial_port_data(port);
 916         unsigned int cflag = tty->termios.c_cflag;
 917         int status;
 918         u32 actual;
 919         u32 parity;
 920         int csize = CS7;
 921         int baud;
 922         u32 newval = cflag & supported_mask;
 923
 924         /* Just use the ospeed. ispeed should be the same. */
 925         baud = tty->termios.c_ospeed;
 926
 927         dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
 928
 929         /* compute the parity parameter */
 930         parity = 0;
 931         if (cflag & CMSPAR) {   /* Using mark space */
 932                 if (cflag & PARODD)
 933                         parity |= IUU_PARITY_SPACE;
 934                 else
 935                         parity |= IUU_PARITY_MARK;
 936         } else if (!(cflag & PARENB)) {
 937                 parity |= IUU_PARITY_NONE;
 938                 csize = CS8;
 939         } else if (cflag & PARODD)
 940                 parity |= IUU_PARITY_ODD;
 941         else
 942                 parity |= IUU_PARITY_EVEN;
 943
 944         parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
 945
 946         /* set it */
 947         status = iuu_uart_baud(port,
 948                         baud * priv->boost / 100,
 949                         &actual, parity);
 950
 951         /* set the termios value to the real one, so the user now what has
 952          * changed. We support few fields so its easies to copy the old hw
 953          * settings back over and then adjust them
 954          */
 955         if (old_termios)
 956                 tty_termios_copy_hw(&tty->termios, old_termios);
 957         if (status != 0)        /* Set failed - return old bits */
 958                 return;
 959         /* Re-encode speed, parity and csize */
 960         tty_encode_baud_rate(tty, baud, baud);
 961         tty->termios.c_cflag &= ~(supported_mask|CSIZE);
 962         tty->termios.c_cflag |= newval | csize;
 963 }
 964
 965 static void iuu_close(struct usb_serial_port *port)
 966 {
 967         /* iuu_led (port,255,0,0,0); */
 968
 969         iuu_uart_off(port);
 970
 971         usb_kill_urb(port->write_urb);
 972         usb_kill_urb(port->read_urb);
 973
 974         iuu_led(port, 0, 0, 0xF000, 0xFF);
 975 }
 976
 977 static void iuu_init_termios(struct tty_struct *tty)
 978 {
 979         tty->termios = tty_std_termios;
 980         tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
 981                                 | TIOCM_CTS | CSTOPB | PARENB;
 982         tty->termios.c_ispeed = 9600;
 983         tty->termios.c_ospeed = 9600;
 984         tty->termios.c_lflag = 0;
 985         tty->termios.c_oflag = 0;
 986         tty->termios.c_iflag = 0;
 987 }
 988
 989 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 990 {
 991         struct usb_serial *serial = port->serial;
 992         struct device *dev = &port->dev;
 993         u8 *buf;
 994         int result;
 995         int baud;
 996         u32 actual;
 997         struct iuu_private *priv = usb_get_serial_port_data(port);
 998
 999         baud = tty->termios.c_ospeed;
1000         tty->termios.c_ispeed = baud;
1001         /* Re-encode speed */
1002         tty_encode_baud_rate(tty, baud, baud);
1003
1004         dev_dbg(dev, "%s - baud %d\n", __func__, baud);
1005         usb_clear_halt(serial->dev, port->write_urb->pipe);
1006         usb_clear_halt(serial->dev, port->read_urb->pipe);
1007
1008         buf = kmalloc(10, GFP_KERNEL);
1009         if (buf == NULL)
1010                 return -ENOMEM;
1011
1012         priv->poll = 0;
1013
1014         /* initialize writebuf */
1015 #define FISH(a, b, c, d) do { \
1016         result = usb_control_msg(port->serial->dev,     \
1017                                 usb_rcvctrlpipe(port->serial->dev, 0),  \
1018                                 b, a, c, d, buf, 1, 1000); \
1019         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n", a, b, c, d, result, \
1020                                 buf[0]); } while (0);
1021
1022 #define SOUP(a, b, c, d)  do { \
1023         result = usb_control_msg(port->serial->dev,     \
1024                                 usb_sndctrlpipe(port->serial->dev, 0),  \
1025                                 b, a, c, d, NULL, 0, 1000); \
1026         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d\n", a, b, c, d, result); } while (0)
1027
1028         /*  This is not UART related but IUU USB driver related or something */
1029         /*  like that. Basically no IUU will accept any commands from the USB */
1030         /*  host unless it has received the following message */
1031         /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1032
1033         SOUP(0x03, 0x02, 0x02, 0x0);
1034         kfree(buf);
1035         iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1036         iuu_uart_on(port);
1037         if (boost < 100)
1038                 boost = 100;
1039         priv->boost = boost;
1040         priv->baud = baud;
1041         switch (clockmode) {
1042         case 2:         /*  3.680 Mhz */
1043                 priv->clk = IUU_CLK_3680000;
1044                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1045                 result =
1046                     iuu_uart_baud(port, baud * boost / 100, &actual,
1047                                   IUU_PARITY_EVEN);
1048                 break;
1049         case 3:         /*  6.00 Mhz */
1050                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1051                 priv->clk = IUU_CLK_6000000;
1052                 /* Ratio of 6000000 to 3500000 for baud 9600 */
1053                 result =
1054                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
1055                                   IUU_PARITY_EVEN);
1056                 break;
1057         default:                /*  3.579 Mhz */
1058                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1059                 priv->clk = IUU_CLK_3579000;
1060                 result =
1061                     iuu_uart_baud(port, baud * boost / 100, &actual,
1062                                   IUU_PARITY_EVEN);
1063         }
1064
1065         /* set the cardin cardout signals */
1066         switch (cdmode) {
1067         case 0:
1068                 iuu_cardin = 0;
1069                 iuu_cardout = 0;
1070                 break;
1071         case 1:
1072                 iuu_cardin = TIOCM_CD;
1073                 iuu_cardout =  0;
1074                 break;
1075         case 2:
1076                 iuu_cardin = 0;
1077                 iuu_cardout = TIOCM_CD;
1078                 break;
1079         case 3:
1080                 iuu_cardin = TIOCM_DSR;
1081                 iuu_cardout = 0;
1082                 break;
1083         case 4:
1084                 iuu_cardin = 0;
1085                 iuu_cardout = TIOCM_DSR;
1086                 break;
1087         case 5:
1088                 iuu_cardin = TIOCM_CTS;
1089                 iuu_cardout = 0;
1090                 break;
1091         case 6:
1092                 iuu_cardin = 0;
1093                 iuu_cardout = TIOCM_CTS;
1094                 break;
1095         case 7:
1096                 iuu_cardin = TIOCM_RNG;
1097                 iuu_cardout = 0;
1098                 break;
1099         case 8:
1100                 iuu_cardin = 0;
1101                 iuu_cardout = TIOCM_RNG;
1102         }
1103
1104         iuu_uart_flush(port);
1105
1106         dev_dbg(dev, "%s - initialization done\n", __func__);
1107
1108         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1109         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1110                           usb_sndbulkpipe(port->serial->dev,
1111                                           port->bulk_out_endpointAddress),
1112                           port->write_urb->transfer_buffer, 1,
1113                           read_rxcmd_callback, port);
1114         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1115         if (result) {
1116                 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1117                 iuu_close(port);
1118         } else {
1119                 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1120         }
1121
1122         return result;
1123 }
1124
1125 /* how to change VCC */
1126 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1127 {
1128         int status;
1129         u8 *buf;
1130
1131         buf = kmalloc(5, GFP_KERNEL);
1132         if (!buf)
1133                 return -ENOMEM;
1134
1135         buf[0] = IUU_SET_VCC;
1136         buf[1] = vcc & 0xFF;
1137         buf[2] = (vcc >> 8) & 0xFF;
1138         buf[3] = (vcc >> 16) & 0xFF;
1139         buf[4] = (vcc >> 24) & 0xFF;
1140
1141         status = bulk_immediate(port, buf, 5);
1142         kfree(buf);
1143
1144         if (status != IUU_OPERATION_OK)
1145                 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1146         else
1147                 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1148
1149         return status;
1150 }
1151
1152 /*
1153  * Sysfs Attributes
1154  */
1155
1156 static ssize_t vcc_mode_show(struct device *dev,
1157         struct device_attribute *attr, char *buf)
1158 {
1159         struct usb_serial_port *port = to_usb_serial_port(dev);
1160         struct iuu_private *priv = usb_get_serial_port_data(port);
1161
1162         return sprintf(buf, "%d\n", priv->vcc);
1163 }
1164
1165 static ssize_t vcc_mode_store(struct device *dev,
1166         struct device_attribute *attr, const char *buf, size_t count)
1167 {
1168         struct usb_serial_port *port = to_usb_serial_port(dev);
1169         struct iuu_private *priv = usb_get_serial_port_data(port);
1170         unsigned long v;
1171
1172         if (kstrtoul(buf, 10, &v)) {
1173                 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1174                                 __func__, buf);
1175                 goto fail_store_vcc_mode;
1176         }
1177
1178         dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1179
1180         if ((v != 3) && (v != 5)) {
1181                 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1182         } else {
1183                 iuu_vcc_set(port, v);
1184                 priv->vcc = v;
1185         }
1186 fail_store_vcc_mode:
1187         return count;
1188 }
1189 static DEVICE_ATTR_RW(vcc_mode);
1190
1191 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1192 {
1193         return device_create_file(&port->dev, &dev_attr_vcc_mode);
1194 }
1195
1196 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1197 {
1198         device_remove_file(&port->dev, &dev_attr_vcc_mode);
1199         return 0;
1200 }
1201
1202 /*
1203  * End Sysfs Attributes
1204  */
1205
1206 static struct usb_serial_driver iuu_device = {
1207         .driver = {
1208                    .owner = THIS_MODULE,
1209                    .name = "iuu_phoenix",
1210                    },
1211         .id_table = id_table,
1212         .num_ports = 1,
1213         .bulk_in_size = 512,
1214         .bulk_out_size = 512,
1215         .open = iuu_open,
1216         .close = iuu_close,
1217         .write = iuu_uart_write,
1218         .read_bulk_callback = iuu_uart_read_callback,
1219         .tiocmget = iuu_tiocmget,
1220         .tiocmset = iuu_tiocmset,
1221         .set_termios = iuu_set_termios,
1222         .init_termios = iuu_init_termios,
1223         .attach = iuu_attach,
1224         .port_probe = iuu_port_probe,
1225         .port_remove = iuu_port_remove,
1226 };
1227
1228 static struct usb_serial_driver * const serial_drivers[] = {
1229         &iuu_device, NULL
1230 };
1231
1232 module_usb_serial_driver(serial_drivers, id_table);
1233
1234 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1235
1236 MODULE_DESCRIPTION(DRIVER_DESC);
1237 MODULE_LICENSE("GPL");
1238
1239 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1240 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1241
1242 module_param(boost, int, S_IRUGO | S_IWUSR);
1243 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1244
1245 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1246 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1247                 "3=6 Mhz)");
1248
1249 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1250 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1251                  "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1252
1253 module_param(vcc_default, int, S_IRUGO | S_IWUSR);
1254 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1255                 "for 5V). Default to 5.");