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/init.h>
  21 #include <linux/slab.h>
  22 #include <linux/tty.h>
  23 #include <linux/tty_driver.h>
  24 #include <linux/tty_flip.h>
  25 #include <linux/serial.h>
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/uaccess.h>
  30 #include <linux/usb.h>
  31 #include <linux/usb/serial.h>
  32 #include "iuu_phoenix.h"
  33 #include <linux/random.h>
  34
  35 /*
  36  * Version Information
  37  */
  38 #define DRIVER_VERSION "v0.12"
  39 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
  40
  41 static const struct usb_device_id id_table[] = {
  42         {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
  43         {}                      /* Terminating entry */
  44 };
  45 MODULE_DEVICE_TABLE(usb, id_table);
  46
  47 /* turbo parameter */
  48 static int boost = 100;
  49 static int clockmode = 1;
  50 static int cdmode = 1;
  51 static int iuu_cardin;
  52 static int iuu_cardout;
  53 static bool xmas;
  54 static int vcc_default = 5;
  55
  56 static void read_rxcmd_callback(struct urb *urb);
  57
  58 struct iuu_private {
  59         spinlock_t lock;        /* store irq state */
  60         wait_queue_head_t delta_msr_wait;
  61         u8 line_status;
  62         int tiostatus;          /* store IUART SIGNAL for tiocmget call */
  63         u8 reset;               /* if 1 reset is needed */
  64         int poll;               /* number of poll */
  65         u8 *writebuf;           /* buffer for writing to device */
  66         int writelen;           /* num of byte to write to device */
  67         u8 *buf;                /* used for initialize speed */
  68         u8 len;
  69         int vcc;                /* vcc (either 3 or 5 V) */
  70         u32 baud;
  71         u32 boost;
  72         u32 clk;
  73 };
  74
  75 static int iuu_port_probe(struct usb_serial_port *port)
  76 {
  77         struct iuu_private *priv;
  78
  79         priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
  80         if (!priv)
  81                 return -ENOMEM;
  82
  83         priv->buf = kzalloc(256, GFP_KERNEL);
  84         if (!priv->buf) {
  85                 kfree(priv);
  86                 return -ENOMEM;
  87         }
  88
  89         priv->writebuf = kzalloc(256, GFP_KERNEL);
  90         if (!priv->writebuf) {
  91                 kfree(priv->buf);
  92                 kfree(priv);
  93                 return -ENOMEM;
  94         }
  95
  96         priv->vcc = vcc_default;
  97         spin_lock_init(&priv->lock);
  98         init_waitqueue_head(&priv->delta_msr_wait);
  99
 100         usb_set_serial_port_data(port, priv);
 101
 102         return 0;
 103 }
 104
 105 static int iuu_port_remove(struct usb_serial_port *port)
 106 {
 107         struct iuu_private *priv = usb_get_serial_port_data(port);
 108
 109         kfree(priv->writebuf);
 110         kfree(priv->buf);
 111         kfree(priv);
 112
 113         return 0;
 114 }
 115
 116 static int iuu_tiocmset(struct tty_struct *tty,
 117                         unsigned int set, unsigned int clear)
 118 {
 119         struct usb_serial_port *port = tty->driver_data;
 120         struct iuu_private *priv = usb_get_serial_port_data(port);
 121         unsigned long flags;
 122
 123         /* FIXME: locking on tiomstatus */
 124         dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
 125                 __func__, set, clear);
 126
 127         spin_lock_irqsave(&priv->lock, flags);
 128
 129         if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
 130                 dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
 131                 priv->reset = 1;
 132         }
 133         if (set & TIOCM_RTS)
 134                 priv->tiostatus = TIOCM_RTS;
 135
 136         spin_unlock_irqrestore(&priv->lock, flags);
 137         return 0;
 138 }
 139
 140 /* This is used to provide a carrier detect mechanism
 141  * When a card is present, the response is 0x00
 142  * When no card , the reader respond with TIOCM_CD
 143  * This is known as CD autodetect mechanism
 144  */
 145 static int iuu_tiocmget(struct tty_struct *tty)
 146 {
 147         struct usb_serial_port *port = tty->driver_data;
 148         struct iuu_private *priv = usb_get_serial_port_data(port);
 149         unsigned long flags;
 150         int rc;
 151
 152         spin_lock_irqsave(&priv->lock, flags);
 153         rc = priv->tiostatus;
 154         spin_unlock_irqrestore(&priv->lock, flags);
 155
 156         return rc;
 157 }
 158
 159 static void iuu_rxcmd(struct urb *urb)
 160 {
 161         struct usb_serial_port *port = urb->context;
 162         int result;
 163         int status = urb->status;
 164
 165         if (status) {
 166                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 167                 /* error stop all */
 168                 return;
 169         }
 170
 171
 172         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
 173         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 174                           usb_sndbulkpipe(port->serial->dev,
 175                                           port->bulk_out_endpointAddress),
 176                           port->write_urb->transfer_buffer, 1,
 177                           read_rxcmd_callback, port);
 178         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 179 }
 180
 181 static int iuu_reset(struct usb_serial_port *port, u8 wt)
 182 {
 183         struct iuu_private *priv = usb_get_serial_port_data(port);
 184         int result;
 185         char *buf_ptr = port->write_urb->transfer_buffer;
 186
 187         /* Prepare the reset sequence */
 188
 189         *buf_ptr++ = IUU_RST_SET;
 190         *buf_ptr++ = IUU_DELAY_MS;
 191         *buf_ptr++ = wt;
 192         *buf_ptr = IUU_RST_CLEAR;
 193
 194         /* send the sequence */
 195
 196         usb_fill_bulk_urb(port->write_urb,
 197                           port->serial->dev,
 198                           usb_sndbulkpipe(port->serial->dev,
 199                                           port->bulk_out_endpointAddress),
 200                           port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
 201         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 202         priv->reset = 0;
 203         return result;
 204 }
 205
 206 /* Status Function
 207  * Return value is
 208  * 0x00 = no card
 209  * 0x01 = smartcard
 210  * 0x02 = sim card
 211  */
 212 static void iuu_update_status_callback(struct urb *urb)
 213 {
 214         struct usb_serial_port *port = urb->context;
 215         struct iuu_private *priv = usb_get_serial_port_data(port);
 216         u8 *st;
 217         int status = urb->status;
 218
 219         if (status) {
 220                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 221                 /* error stop all */
 222                 return;
 223         }
 224
 225         st = urb->transfer_buffer;
 226         dev_dbg(&port->dev, "%s - enter\n", __func__);
 227         if (urb->actual_length == 1) {
 228                 switch (st[0]) {
 229                 case 0x1:
 230                         priv->tiostatus = iuu_cardout;
 231                         break;
 232                 case 0x0:
 233                         priv->tiostatus = iuu_cardin;
 234                         break;
 235                 default:
 236                         priv->tiostatus = iuu_cardin;
 237                 }
 238         }
 239         iuu_rxcmd(urb);
 240 }
 241
 242 static void iuu_status_callback(struct urb *urb)
 243 {
 244         struct usb_serial_port *port = urb->context;
 245         int result;
 246         int status = urb->status;
 247
 248         dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 249         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 250                           usb_rcvbulkpipe(port->serial->dev,
 251                                           port->bulk_in_endpointAddress),
 252                           port->read_urb->transfer_buffer, 256,
 253                           iuu_update_status_callback, port);
 254         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 255 }
 256
 257 static int iuu_status(struct usb_serial_port *port)
 258 {
 259         int result;
 260
 261         memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
 262         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 263                           usb_sndbulkpipe(port->serial->dev,
 264                                           port->bulk_out_endpointAddress),
 265                           port->write_urb->transfer_buffer, 1,
 266                           iuu_status_callback, port);
 267         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 268         return result;
 269
 270 }
 271
 272 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 273 {
 274         int status;
 275         struct usb_serial *serial = port->serial;
 276         int actual = 0;
 277
 278         /* send the data out the bulk port */
 279
 280         status =
 281             usb_bulk_msg(serial->dev,
 282                          usb_sndbulkpipe(serial->dev,
 283                                          port->bulk_out_endpointAddress), buf,
 284                          count, &actual, HZ * 1);
 285
 286         if (status != IUU_OPERATION_OK)
 287                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 288         else
 289                 dev_dbg(&port->dev, "%s - write OK !\n", __func__);
 290         return status;
 291 }
 292
 293 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 294 {
 295         int status;
 296         struct usb_serial *serial = port->serial;
 297         int actual = 0;
 298
 299         /* send the data out the bulk port */
 300         status =
 301             usb_bulk_msg(serial->dev,
 302                          usb_rcvbulkpipe(serial->dev,
 303                                          port->bulk_in_endpointAddress), buf,
 304                          count, &actual, HZ * 1);
 305
 306         if (status != IUU_OPERATION_OK)
 307                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 308         else
 309                 dev_dbg(&port->dev, "%s - read OK !\n", __func__);
 310         return status;
 311 }
 312
 313 static int iuu_led(struct usb_serial_port *port, unsigned int R,
 314                    unsigned int G, unsigned int B, u8 f)
 315 {
 316         int status;
 317         u8 *buf;
 318         buf = kmalloc(8, GFP_KERNEL);
 319         if (!buf)
 320                 return -ENOMEM;
 321
 322         buf[0] = IUU_SET_LED;
 323         buf[1] = R & 0xFF;
 324         buf[2] = (R >> 8) & 0xFF;
 325         buf[3] = G & 0xFF;
 326         buf[4] = (G >> 8) & 0xFF;
 327         buf[5] = B & 0xFF;
 328         buf[6] = (B >> 8) & 0xFF;
 329         buf[7] = f;
 330         status = bulk_immediate(port, buf, 8);
 331         kfree(buf);
 332         if (status != IUU_OPERATION_OK)
 333                 dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
 334         else
 335                 dev_dbg(&port->dev, "%s - led OK !\n", __func__);
 336         return IUU_OPERATION_OK;
 337 }
 338
 339 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
 340                                  u8 b2, u8 freq)
 341 {
 342         *buf++ = IUU_SET_LED;
 343         *buf++ = r1;
 344         *buf++ = r2;
 345         *buf++ = g1;
 346         *buf++ = g2;
 347         *buf++ = b1;
 348         *buf++ = b2;
 349         *buf = freq;
 350 }
 351
 352 static void iuu_led_activity_on(struct urb *urb)
 353 {
 354         struct usb_serial_port *port = urb->context;
 355         int result;
 356         char *buf_ptr = port->write_urb->transfer_buffer;
 357         *buf_ptr++ = IUU_SET_LED;
 358         if (xmas == 1) {
 359                 get_random_bytes(buf_ptr, 6);
 360                 *(buf_ptr+7) = 1;
 361         } else {
 362                 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
 363         }
 364
 365         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 366                           usb_sndbulkpipe(port->serial->dev,
 367                                           port->bulk_out_endpointAddress),
 368                           port->write_urb->transfer_buffer, 8 ,
 369                           iuu_rxcmd, port);
 370         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 371 }
 372
 373 static void iuu_led_activity_off(struct urb *urb)
 374 {
 375         struct usb_serial_port *port = urb->context;
 376         int result;
 377         char *buf_ptr = port->write_urb->transfer_buffer;
 378         if (xmas == 1) {
 379                 iuu_rxcmd(urb);
 380                 return;
 381         } else {
 382                 *buf_ptr++ = IUU_SET_LED;
 383                 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
 384         }
 385         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 386                           usb_sndbulkpipe(port->serial->dev,
 387                                           port->bulk_out_endpointAddress),
 388                           port->write_urb->transfer_buffer, 8 ,
 389                           iuu_rxcmd, port);
 390         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 391 }
 392
 393
 394
 395 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
 396 {
 397         int status;
 398         struct iuu_private *priv = usb_get_serial_port_data(port);
 399         int Count = 0;
 400         u8 FrqGenAdr = 0x69;
 401         u8 DIV = 0;             /* 8bit */
 402         u8 XDRV = 0;            /* 8bit */
 403         u8 PUMP = 0;            /* 3bit */
 404         u8 PBmsb = 0;           /* 2bit */
 405         u8 PBlsb = 0;           /* 8bit */
 406         u8 PO = 0;              /* 1bit */
 407         u8 Q = 0;               /* 7bit */
 408         /* 24bit = 3bytes */
 409         unsigned int P = 0;
 410         unsigned int P2 = 0;
 411         int frq = (int)dwFrq;
 412
 413         if (frq == 0) {
 414                 priv->buf[Count++] = IUU_UART_WRITE_I2C;
 415                 priv->buf[Count++] = FrqGenAdr << 1;
 416                 priv->buf[Count++] = 0x09;
 417                 priv->buf[Count++] = 0x00;
 418
 419                 status = bulk_immediate(port, (u8 *) priv->buf, Count);
 420                 if (status != 0) {
 421                         dev_dbg(&port->dev, "%s - write error\n", __func__);
 422                         return status;
 423                 }
 424         } else if (frq == 3579000) {
 425                 DIV = 100;
 426                 P = 1193;
 427                 Q = 40;
 428                 XDRV = 0;
 429         } else if (frq == 3680000) {
 430                 DIV = 105;
 431                 P = 161;
 432                 Q = 5;
 433                 XDRV = 0;
 434         } else if (frq == 6000000) {
 435                 DIV = 66;
 436                 P = 66;
 437                 Q = 2;
 438                 XDRV = 0x28;
 439         } else {
 440                 unsigned int result = 0;
 441                 unsigned int tmp = 0;
 442                 unsigned int check;
 443                 unsigned int check2;
 444                 char found = 0x00;
 445                 unsigned int lQ = 2;
 446                 unsigned int lP = 2055;
 447                 unsigned int lDiv = 4;
 448
 449                 for (lQ = 2; lQ <= 47 && !found; lQ++)
 450                         for (lP = 2055; lP >= 8 && !found; lP--)
 451                                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
 452                                         tmp = (12000000 / lDiv) * (lP / lQ);
 453                                         if (abs((int)(tmp - frq)) <
 454                                             abs((int)(frq - result))) {
 455                                                 check2 = (12000000 / lQ);
 456                                                 if (check2 < 250000)
 457                                                         continue;
 458                                                 check = (12000000 / lQ) * lP;
 459                                                 if (check > 400000000)
 460                                                         continue;
 461                                                 if (check < 100000000)
 462                                                         continue;
 463                                                 if (lDiv < 4 || lDiv > 127)
 464                                                         continue;
 465                                                 result = tmp;
 466                                                 P = lP;
 467                                                 DIV = lDiv;
 468                                                 Q = lQ;
 469                                                 if (result == frq)
 470                                                         found = 0x01;
 471                                         }
 472                                 }
 473         }
 474         P2 = ((P - PO) / 2) - 4;
 475         DIV = DIV;
 476         PUMP = 0x04;
 477         PBmsb = (P2 >> 8 & 0x03);
 478         PBlsb = P2 & 0xFF;
 479         PO = (P >> 10) & 0x01;
 480         Q = Q - 2;
 481
 482         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 483         priv->buf[Count++] = FrqGenAdr << 1;
 484         priv->buf[Count++] = 0x09;
 485         priv->buf[Count++] = 0x20;      /* Adr = 0x09 */
 486         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 487         priv->buf[Count++] = FrqGenAdr << 1;
 488         priv->buf[Count++] = 0x0C;
 489         priv->buf[Count++] = DIV;       /* Adr = 0x0C */
 490         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 491         priv->buf[Count++] = FrqGenAdr << 1;
 492         priv->buf[Count++] = 0x12;
 493         priv->buf[Count++] = XDRV;      /* Adr = 0x12 */
 494         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 495         priv->buf[Count++] = FrqGenAdr << 1;
 496         priv->buf[Count++] = 0x13;
 497         priv->buf[Count++] = 0x6B;      /* Adr = 0x13 */
 498         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 499         priv->buf[Count++] = FrqGenAdr << 1;
 500         priv->buf[Count++] = 0x40;
 501         priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
 502                              (PBmsb & 0x03);    /* Adr = 0x40 */
 503         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 504         priv->buf[Count++] = FrqGenAdr << 1;
 505         priv->buf[Count++] = 0x41;
 506         priv->buf[Count++] = PBlsb;     /* Adr = 0x41 */
 507         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 508         priv->buf[Count++] = FrqGenAdr << 1;
 509         priv->buf[Count++] = 0x42;
 510         priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
 511         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 512         priv->buf[Count++] = FrqGenAdr << 1;
 513         priv->buf[Count++] = 0x44;
 514         priv->buf[Count++] = (char)0xFF;        /* Adr = 0x44 */
 515         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 516         priv->buf[Count++] = FrqGenAdr << 1;
 517         priv->buf[Count++] = 0x45;
 518         priv->buf[Count++] = (char)0xFE;        /* Adr = 0x45 */
 519         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 520         priv->buf[Count++] = FrqGenAdr << 1;
 521         priv->buf[Count++] = 0x46;
 522         priv->buf[Count++] = 0x7F;      /* Adr = 0x46 */
 523         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 524         priv->buf[Count++] = FrqGenAdr << 1;
 525         priv->buf[Count++] = 0x47;
 526         priv->buf[Count++] = (char)0x84;        /* Adr = 0x47 */
 527
 528         status = bulk_immediate(port, (u8 *) priv->buf, Count);
 529         if (status != IUU_OPERATION_OK)
 530                 dev_dbg(&port->dev, "%s - write error\n", __func__);
 531         return status;
 532 }
 533
 534 static int iuu_uart_flush(struct usb_serial_port *port)
 535 {
 536         struct device *dev = &port->dev;
 537         int i;
 538         int status;
 539         u8 rxcmd = IUU_UART_RX;
 540         struct iuu_private *priv = usb_get_serial_port_data(port);
 541
 542         if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
 543                 return -EIO;
 544
 545         for (i = 0; i < 2; i++) {
 546                 status = bulk_immediate(port, &rxcmd, 1);
 547                 if (status != IUU_OPERATION_OK) {
 548                         dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
 549                         return status;
 550                 }
 551
 552                 status = read_immediate(port, &priv->len, 1);
 553                 if (status != IUU_OPERATION_OK) {
 554                         dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 555                         return status;
 556                 }
 557
 558                 if (priv->len > 0) {
 559                         dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
 560                         status = read_immediate(port, priv->buf, priv->len);
 561                         if (status != IUU_OPERATION_OK) {
 562                                 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 563                                 return status;
 564                         }
 565                 }
 566         }
 567         dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
 568         iuu_led(port, 0, 0xF000, 0, 0xFF);
 569         return status;
 570 }
 571
 572 static void read_buf_callback(struct urb *urb)
 573 {
 574         struct usb_serial_port *port = urb->context;
 575         unsigned char *data = urb->transfer_buffer;
 576         struct tty_struct *tty;
 577         int status = urb->status;
 578
 579         if (status) {
 580                 if (status == -EPROTO) {
 581                         /* reschedule needed */
 582                 }
 583                 return;
 584         }
 585
 586         dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
 587         tty = tty_port_tty_get(&port->port);
 588         if (data == NULL)
 589                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 590         if (tty && urb->actual_length && data) {
 591                 tty_insert_flip_string(tty, data, urb->actual_length);
 592                 tty_flip_buffer_push(tty);
 593         }
 594         tty_kref_put(tty);
 595         iuu_led_activity_on(urb);
 596 }
 597
 598 static int iuu_bulk_write(struct usb_serial_port *port)
 599 {
 600         struct iuu_private *priv = usb_get_serial_port_data(port);
 601         unsigned long flags;
 602         int result;
 603         int buf_len;
 604         char *buf_ptr = port->write_urb->transfer_buffer;
 605
 606         spin_lock_irqsave(&priv->lock, flags);
 607         *buf_ptr++ = IUU_UART_ESC;
 608         *buf_ptr++ = IUU_UART_TX;
 609         *buf_ptr++ = priv->writelen;
 610
 611         memcpy(buf_ptr, priv->writebuf, priv->writelen);
 612         buf_len = priv->writelen;
 613         priv->writelen = 0;
 614         spin_unlock_irqrestore(&priv->lock, flags);
 615         dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
 616                 buf_len, buf_len, buf_ptr);
 617         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 618                           usb_sndbulkpipe(port->serial->dev,
 619                                           port->bulk_out_endpointAddress),
 620                           port->write_urb->transfer_buffer, buf_len + 3,
 621                           iuu_rxcmd, port);
 622         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 623         usb_serial_port_softint(port);
 624         return result;
 625 }
 626
 627 static int iuu_read_buf(struct usb_serial_port *port, int len)
 628 {
 629         int result;
 630
 631         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 632                           usb_rcvbulkpipe(port->serial->dev,
 633                                           port->bulk_in_endpointAddress),
 634                           port->read_urb->transfer_buffer, len,
 635                           read_buf_callback, port);
 636         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 637         return result;
 638 }
 639
 640 static void iuu_uart_read_callback(struct urb *urb)
 641 {
 642         struct usb_serial_port *port = urb->context;
 643         struct iuu_private *priv = usb_get_serial_port_data(port);
 644         unsigned long flags;
 645         int status = urb->status;
 646         int error = 0;
 647         int len = 0;
 648         unsigned char *data = urb->transfer_buffer;
 649         priv->poll++;
 650
 651         if (status) {
 652                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 653                 /* error stop all */
 654                 return;
 655         }
 656         if (data == NULL)
 657                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 658
 659         if (urb->actual_length == 1  && data != NULL)
 660                 len = (int) data[0];
 661
 662         if (urb->actual_length > 1) {
 663                 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
 664                     urb->actual_length);
 665                 error = 1;
 666                 return;
 667         }
 668         /* if len > 0 call readbuf */
 669
 670         if (len > 0 && error == 0) {
 671                 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
 672                         __func__, len);
 673                 status = iuu_read_buf(port, len);
 674                 return;
 675         }
 676         /* need to update status  ? */
 677         if (priv->poll > 99) {
 678                 status = iuu_status(port);
 679                 priv->poll = 0;
 680                 return;
 681         }
 682
 683         /* reset waiting ? */
 684
 685         if (priv->reset == 1) {
 686                 status = iuu_reset(port, 0xC);
 687                 return;
 688         }
 689         /* Writebuf is waiting */
 690         spin_lock_irqsave(&priv->lock, flags);
 691         if (priv->writelen > 0) {
 692                 spin_unlock_irqrestore(&priv->lock, flags);
 693                 status = iuu_bulk_write(port);
 694                 return;
 695         }
 696         spin_unlock_irqrestore(&priv->lock, flags);
 697         /* if nothing to write call again rxcmd */
 698         dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
 699         iuu_led_activity_off(urb);
 700 }
 701
 702 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
 703                           const u8 *buf, int count)
 704 {
 705         struct iuu_private *priv = usb_get_serial_port_data(port);
 706         unsigned long flags;
 707
 708         if (count > 256)
 709                 return -ENOMEM;
 710
 711         spin_lock_irqsave(&priv->lock, flags);
 712
 713         /* fill the buffer */
 714         memcpy(priv->writebuf + priv->writelen, buf, count);
 715         priv->writelen += count;
 716         spin_unlock_irqrestore(&priv->lock, flags);
 717
 718         return count;
 719 }
 720
 721 static void read_rxcmd_callback(struct urb *urb)
 722 {
 723         struct usb_serial_port *port = urb->context;
 724         int result;
 725         int status = urb->status;
 726
 727         if (status) {
 728                 /* error stop all */
 729                 return;
 730         }
 731
 732         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 733                           usb_rcvbulkpipe(port->serial->dev,
 734                                           port->bulk_in_endpointAddress),
 735                           port->read_urb->transfer_buffer, 256,
 736                           iuu_uart_read_callback, port);
 737         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 738         dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
 739 }
 740
 741 static int iuu_uart_on(struct usb_serial_port *port)
 742 {
 743         int status;
 744         u8 *buf;
 745
 746         buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
 747
 748         if (!buf)
 749                 return -ENOMEM;
 750
 751         buf[0] = IUU_UART_ENABLE;
 752         buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
 753         buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
 754         buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
 755
 756         status = bulk_immediate(port, buf, 4);
 757         if (status != IUU_OPERATION_OK) {
 758                 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
 759                 goto uart_enable_failed;
 760         }
 761         /*  iuu_reset() the card after iuu_uart_on() */
 762         status = iuu_uart_flush(port);
 763         if (status != IUU_OPERATION_OK)
 764                 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
 765 uart_enable_failed:
 766         kfree(buf);
 767         return status;
 768 }
 769
 770 /*  Diables the IUU UART (a.k.a. the Phoenix voiderface) */
 771 static int iuu_uart_off(struct usb_serial_port *port)
 772 {
 773         int status;
 774         u8 *buf;
 775         buf = kmalloc(1, GFP_KERNEL);
 776         if (!buf)
 777                 return -ENOMEM;
 778         buf[0] = IUU_UART_DISABLE;
 779
 780         status = bulk_immediate(port, buf, 1);
 781         if (status != IUU_OPERATION_OK)
 782                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 783
 784         kfree(buf);
 785         return status;
 786 }
 787
 788 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 789                          u32 *actual, u8 parity)
 790 {
 791         int status;
 792         u32 baud;
 793         u8 *dataout;
 794         u8 DataCount = 0;
 795         u8 T1Frekvens = 0;
 796         u8 T1reload = 0;
 797         unsigned int T1FrekvensHZ = 0;
 798
 799         dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
 800         dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
 801
 802         if (!dataout)
 803                 return -ENOMEM;
 804         /*baud = (((priv->clk / 35) * baud_base) / 100000); */
 805         baud = baud_base;
 806
 807         if (baud < 1200 || baud > 230400) {
 808                 kfree(dataout);
 809                 return IUU_INVALID_PARAMETER;
 810         }
 811         if (baud > 977) {
 812                 T1Frekvens = 3;
 813                 T1FrekvensHZ = 500000;
 814         }
 815
 816         if (baud > 3906) {
 817                 T1Frekvens = 2;
 818                 T1FrekvensHZ = 2000000;
 819         }
 820
 821         if (baud > 11718) {
 822                 T1Frekvens = 1;
 823                 T1FrekvensHZ = 6000000;
 824         }
 825
 826         if (baud > 46875) {
 827                 T1Frekvens = 0;
 828                 T1FrekvensHZ = 24000000;
 829         }
 830
 831         T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
 832
 833         /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
 834         dataout[DataCount++] = IUU_UART_ESC;
 835         /*  magic number here:  CHANGE_BAUD; */
 836         dataout[DataCount++] = IUU_UART_CHANGE;
 837         dataout[DataCount++] = T1Frekvens;
 838         dataout[DataCount++] = T1reload;
 839
 840         *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
 841
 842         switch (parity & 0x0F) {
 843         case IUU_PARITY_NONE:
 844                 dataout[DataCount++] = 0x00;
 845                 break;
 846         case IUU_PARITY_EVEN:
 847                 dataout[DataCount++] = 0x01;
 848                 break;
 849         case IUU_PARITY_ODD:
 850                 dataout[DataCount++] = 0x02;
 851                 break;
 852         case IUU_PARITY_MARK:
 853                 dataout[DataCount++] = 0x03;
 854                 break;
 855         case IUU_PARITY_SPACE:
 856                 dataout[DataCount++] = 0x04;
 857                 break;
 858         default:
 859                 kfree(dataout);
 860                 return IUU_INVALID_PARAMETER;
 861                 break;
 862         }
 863
 864         switch (parity & 0xF0) {
 865         case IUU_ONE_STOP_BIT:
 866                 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
 867                 break;
 868
 869         case IUU_TWO_STOP_BITS:
 870                 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 871                 break;
 872         default:
 873                 kfree(dataout);
 874                 return IUU_INVALID_PARAMETER;
 875                 break;
 876         }
 877
 878         status = bulk_immediate(port, dataout, DataCount);
 879         if (status != IUU_OPERATION_OK)
 880                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 881         kfree(dataout);
 882         return status;
 883 }
 884
 885 static void iuu_set_termios(struct tty_struct *tty,
 886                 struct usb_serial_port *port, struct ktermios *old_termios)
 887 {
 888         const u32 supported_mask = CMSPAR|PARENB|PARODD;
 889         struct iuu_private *priv = usb_get_serial_port_data(port);
 890         unsigned int cflag = tty->termios.c_cflag;
 891         int status;
 892         u32 actual;
 893         u32 parity;
 894         int csize = CS7;
 895         int baud;
 896         u32 newval = cflag & supported_mask;
 897
 898         /* Just use the ospeed. ispeed should be the same. */
 899         baud = tty->termios.c_ospeed;
 900
 901         dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
 902
 903         /* compute the parity parameter */
 904         parity = 0;
 905         if (cflag & CMSPAR) {   /* Using mark space */
 906                 if (cflag & PARODD)
 907                         parity |= IUU_PARITY_SPACE;
 908                 else
 909                         parity |= IUU_PARITY_MARK;
 910         } else if (!(cflag & PARENB)) {
 911                 parity |= IUU_PARITY_NONE;
 912                 csize = CS8;
 913         } else if (cflag & PARODD)
 914                 parity |= IUU_PARITY_ODD;
 915         else
 916                 parity |= IUU_PARITY_EVEN;
 917
 918         parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
 919
 920         /* set it */
 921         status = iuu_uart_baud(port,
 922                         baud * priv->boost / 100,
 923                         &actual, parity);
 924
 925         /* set the termios value to the real one, so the user now what has
 926          * changed. We support few fields so its easies to copy the old hw
 927          * settings back over and then adjust them
 928          */
 929         if (old_termios)
 930                 tty_termios_copy_hw(&tty->termios, old_termios);
 931         if (status != 0)        /* Set failed - return old bits */
 932                 return;
 933         /* Re-encode speed, parity and csize */
 934         tty_encode_baud_rate(tty, baud, baud);
 935         tty->termios.c_cflag &= ~(supported_mask|CSIZE);
 936         tty->termios.c_cflag |= newval | csize;
 937 }
 938
 939 static void iuu_close(struct usb_serial_port *port)
 940 {
 941         /* iuu_led (port,255,0,0,0); */
 942         struct usb_serial *serial;
 943
 944         serial = port->serial;
 945         if (!serial)
 946                 return;
 947
 948         iuu_uart_off(port);
 949         if (serial->dev) {
 950                 /* free writebuf */
 951                 /* shutdown our urbs */
 952                 dev_dbg(&port->dev, "%s - shutting down urbs\n", __func__);
 953                 usb_kill_urb(port->write_urb);
 954                 usb_kill_urb(port->read_urb);
 955                 usb_kill_urb(port->interrupt_in_urb);
 956                 iuu_led(port, 0, 0, 0xF000, 0xFF);
 957         }
 958 }
 959
 960 static void iuu_init_termios(struct tty_struct *tty)
 961 {
 962         tty->termios = tty_std_termios;
 963         tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
 964                                 | TIOCM_CTS | CSTOPB | PARENB;
 965         tty->termios.c_ispeed = 9600;
 966         tty->termios.c_ospeed = 9600;
 967         tty->termios.c_lflag = 0;
 968         tty->termios.c_oflag = 0;
 969         tty->termios.c_iflag = 0;
 970 }
 971
 972 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 973 {
 974         struct usb_serial *serial = port->serial;
 975         struct device *dev = &port->dev;
 976         u8 *buf;
 977         int result;
 978         int baud;
 979         u32 actual;
 980         struct iuu_private *priv = usb_get_serial_port_data(port);
 981
 982         baud = tty->termios.c_ospeed;
 983         tty->termios.c_ispeed = baud;
 984         /* Re-encode speed */
 985         tty_encode_baud_rate(tty, baud, baud);
 986
 987         dev_dbg(dev, "%s - baud %d\n", __func__, baud);
 988         usb_clear_halt(serial->dev, port->write_urb->pipe);
 989         usb_clear_halt(serial->dev, port->read_urb->pipe);
 990
 991         buf = kmalloc(10, GFP_KERNEL);
 992         if (buf == NULL)
 993                 return -ENOMEM;
 994
 995         priv->poll = 0;
 996
 997         /* initialize writebuf */
 998 #define FISH(a, b, c, d) do { \
 999         result = usb_control_msg(port->serial->dev,     \
1000                                 usb_rcvctrlpipe(port->serial->dev, 0),  \
1001                                 b, a, c, d, buf, 1, 1000); \
1002         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n", a, b, c, d, result, \
1003                                 buf[0]); } while (0);
1004
1005 #define SOUP(a, b, c, d)  do { \
1006         result = usb_control_msg(port->serial->dev,     \
1007                                 usb_sndctrlpipe(port->serial->dev, 0),  \
1008                                 b, a, c, d, NULL, 0, 1000); \
1009         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d\n", a, b, c, d, result); } while (0)
1010
1011         /*  This is not UART related but IUU USB driver related or something */
1012         /*  like that. Basically no IUU will accept any commands from the USB */
1013         /*  host unless it has received the following message */
1014         /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1015
1016         SOUP(0x03, 0x02, 0x02, 0x0);
1017         kfree(buf);
1018         iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1019         iuu_uart_on(port);
1020         if (boost < 100)
1021                 boost = 100;
1022         priv->boost = boost;
1023         priv->baud = baud;
1024         switch (clockmode) {
1025         case 2:         /*  3.680 Mhz */
1026                 priv->clk = IUU_CLK_3680000;
1027                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1028                 result =
1029                     iuu_uart_baud(port, baud * boost / 100, &actual,
1030                                   IUU_PARITY_EVEN);
1031                 break;
1032         case 3:         /*  6.00 Mhz */
1033                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1034                 priv->clk = IUU_CLK_6000000;
1035                 /* Ratio of 6000000 to 3500000 for baud 9600 */
1036                 result =
1037                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
1038                                   IUU_PARITY_EVEN);
1039                 break;
1040         default:                /*  3.579 Mhz */
1041                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1042                 priv->clk = IUU_CLK_3579000;
1043                 result =
1044                     iuu_uart_baud(port, baud * boost / 100, &actual,
1045                                   IUU_PARITY_EVEN);
1046         }
1047
1048         /* set the cardin cardout signals */
1049         switch (cdmode) {
1050         case 0:
1051                 iuu_cardin = 0;
1052                 iuu_cardout = 0;
1053                 break;
1054         case 1:
1055                 iuu_cardin = TIOCM_CD;
1056                 iuu_cardout =  0;
1057                 break;
1058         case 2:
1059                 iuu_cardin = 0;
1060                 iuu_cardout = TIOCM_CD;
1061                 break;
1062         case 3:
1063                 iuu_cardin = TIOCM_DSR;
1064                 iuu_cardout = 0;
1065                 break;
1066         case 4:
1067                 iuu_cardin = 0;
1068                 iuu_cardout = TIOCM_DSR;
1069                 break;
1070         case 5:
1071                 iuu_cardin = TIOCM_CTS;
1072                 iuu_cardout = 0;
1073                 break;
1074         case 6:
1075                 iuu_cardin = 0;
1076                 iuu_cardout = TIOCM_CTS;
1077                 break;
1078         case 7:
1079                 iuu_cardin = TIOCM_RNG;
1080                 iuu_cardout = 0;
1081                 break;
1082         case 8:
1083                 iuu_cardin = 0;
1084                 iuu_cardout = TIOCM_RNG;
1085         }
1086
1087         iuu_uart_flush(port);
1088
1089         dev_dbg(dev, "%s - initialization done\n", __func__);
1090
1091         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1092         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1093                           usb_sndbulkpipe(port->serial->dev,
1094                                           port->bulk_out_endpointAddress),
1095                           port->write_urb->transfer_buffer, 1,
1096                           read_rxcmd_callback, port);
1097         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1098         if (result) {
1099                 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1100                 iuu_close(port);
1101         } else {
1102                 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1103         }
1104
1105         return result;
1106 }
1107
1108 /* how to change VCC */
1109 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1110 {
1111         int status;
1112         u8 *buf;
1113
1114         buf = kmalloc(5, GFP_KERNEL);
1115         if (!buf)
1116                 return -ENOMEM;
1117
1118         buf[0] = IUU_SET_VCC;
1119         buf[1] = vcc & 0xFF;
1120         buf[2] = (vcc >> 8) & 0xFF;
1121         buf[3] = (vcc >> 16) & 0xFF;
1122         buf[4] = (vcc >> 24) & 0xFF;
1123
1124         status = bulk_immediate(port, buf, 5);
1125         kfree(buf);
1126
1127         if (status != IUU_OPERATION_OK)
1128                 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1129         else
1130                 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1131
1132         return status;
1133 }
1134
1135 /*
1136  * Sysfs Attributes
1137  */
1138
1139 static ssize_t show_vcc_mode(struct device *dev,
1140         struct device_attribute *attr, char *buf)
1141 {
1142         struct usb_serial_port *port = to_usb_serial_port(dev);
1143         struct iuu_private *priv = usb_get_serial_port_data(port);
1144
1145         return sprintf(buf, "%d\n", priv->vcc);
1146 }
1147
1148 static ssize_t store_vcc_mode(struct device *dev,
1149         struct device_attribute *attr, const char *buf, size_t count)
1150 {
1151         struct usb_serial_port *port = to_usb_serial_port(dev);
1152         struct iuu_private *priv = usb_get_serial_port_data(port);
1153         unsigned long v;
1154
1155         if (strict_strtoul(buf, 10, &v)) {
1156                 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1157                                 __func__, buf);
1158                 goto fail_store_vcc_mode;
1159         }
1160
1161         dev_dbg(dev, "%s: setting vcc_mode = %ld", __func__, v);
1162
1163         if ((v != 3) && (v != 5)) {
1164                 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1165         } else {
1166                 iuu_vcc_set(port, v);
1167                 priv->vcc = v;
1168         }
1169 fail_store_vcc_mode:
1170         return count;
1171 }
1172
1173 static DEVICE_ATTR(vcc_mode, S_IRUSR | S_IWUSR, show_vcc_mode,
1174         store_vcc_mode);
1175
1176 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1177 {
1178         return device_create_file(&port->dev, &dev_attr_vcc_mode);
1179 }
1180
1181 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1182 {
1183         device_remove_file(&port->dev, &dev_attr_vcc_mode);
1184         return 0;
1185 }
1186
1187 /*
1188  * End Sysfs Attributes
1189  */
1190
1191 static struct usb_serial_driver iuu_device = {
1192         .driver = {
1193                    .owner = THIS_MODULE,
1194                    .name = "iuu_phoenix",
1195                    },
1196         .id_table = id_table,
1197         .num_ports = 1,
1198         .bulk_in_size = 512,
1199         .bulk_out_size = 512,
1200         .port_probe = iuu_create_sysfs_attrs,
1201         .port_remove = iuu_remove_sysfs_attrs,
1202         .open = iuu_open,
1203         .close = iuu_close,
1204         .write = iuu_uart_write,
1205         .read_bulk_callback = iuu_uart_read_callback,
1206         .tiocmget = iuu_tiocmget,
1207         .tiocmset = iuu_tiocmset,
1208         .set_termios = iuu_set_termios,
1209         .init_termios = iuu_init_termios,
1210         .port_probe = iuu_port_probe,
1211         .port_remove = iuu_port_remove,
1212 };
1213
1214 static struct usb_serial_driver * const serial_drivers[] = {
1215         &iuu_device, NULL
1216 };
1217
1218 module_usb_serial_driver(serial_drivers, id_table);
1219
1220 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1221
1222 MODULE_DESCRIPTION(DRIVER_DESC);
1223 MODULE_LICENSE("GPL");
1224
1225 MODULE_VERSION(DRIVER_VERSION);
1226
1227 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1228 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1229
1230 module_param(boost, int, S_IRUGO | S_IWUSR);
1231 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1232
1233 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1234 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1235                 "3=6 Mhz)");
1236
1237 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1238 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1239                  "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1240
1241 module_param(vcc_default, int, S_IRUGO | S_IWUSR);
1242 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1243                 "for 5V). Default to 5.");