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