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