drivers/usb/serial/iuu_phoenix.c

   1 /*
   2  * Infinity Unlimited USB Phoenix driver
   3  *
   4  * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
   5  *
   6  * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos BorrÃ¡s)
   7  *
   8  *      This program is free software; you can redistribute it and/or modify
   9  *      it under the terms of the GNU General Public License as published by
  10  *      the Free Software Foundation; either version 2 of the License, or
  11  *      (at your option) any later version.
  12  *
  13  *  And tested with help of WB Electronics
  14  *
  15  */
  16 #include <linux/kernel.h>
  17 #include <linux/errno.h>
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/tty.h>
  21 #include <linux/tty_driver.h>
  22 #include <linux/tty_flip.h>
  23 #include <linux/serial.h>
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/uaccess.h>
  28 #include <linux/usb.h>
  29 #include <linux/usb/serial.h>
  30 #include "iuu_phoenix.h"
  31 #include <linux/random.h>
  32
  33
  34 #ifdef CONFIG_USB_SERIAL_DEBUG
  35 static int debug = 1;
  36 #else
  37 static int debug;
  38 #endif
  39
  40 /*
  41  * Version Information
  42  */
  43 #define DRIVER_VERSION "v0.5"
  44 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
  45
  46 static struct usb_device_id id_table[] = {
  47         {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
  48         {}                      /* Terminating entry */
  49 };
  50 MODULE_DEVICE_TABLE(usb, id_table);
  51
  52 static struct usb_driver iuu_driver = {
  53         .name = "iuu_phoenix",
  54         .probe = usb_serial_probe,
  55         .disconnect = usb_serial_disconnect,
  56         .id_table = id_table,
  57         .no_dynamic_id = 1,
  58 };
  59
  60 /* turbo parameter */
  61 static int boost = 100;
  62 static int clockmode = 1;
  63 static int cdmode = 1;
  64 static int iuu_cardin;
  65 static int iuu_cardout;
  66 static int xmas;
  67
  68 static void read_rxcmd_callback(struct urb *urb);
  69
  70 struct iuu_private {
  71         spinlock_t lock;        /* store irq state */
  72         wait_queue_head_t delta_msr_wait;
  73         u8 line_control;
  74         u8 line_status;
  75         u8 termios_initialized;
  76         int tiostatus;          /* store IUART SIGNAL for tiocmget call */
  77         u8 reset;               /* if 1 reset is needed */
  78         int poll;               /* number of poll */
  79         u8 *writebuf;           /* buffer for writing to device */
  80         int writelen;           /* num of byte to write to device */
  81         u8 *buf;                /* used for initialize speed */
  82         u8 *dbgbuf;             /* debug buffer */
  83         u8 len;
  84 };
  85
  86
  87 static void iuu_free_buf(struct iuu_private *priv)
  88 {
  89         kfree(priv->buf);
  90         kfree(priv->dbgbuf);
  91         kfree(priv->writebuf);
  92 }
  93
  94 static int iuu_alloc_buf(struct iuu_private *priv)
  95 {
  96         priv->buf = kzalloc(256, GFP_KERNEL);
  97         priv->dbgbuf = kzalloc(256, GFP_KERNEL);
  98         priv->writebuf = kzalloc(256, GFP_KERNEL);
  99         if (!priv->buf || !priv->dbgbuf || !priv->writebuf) {
 100                 iuu_free_buf(priv);
 101                 dbg("%s problem allocation buffer", __func__);
 102                 return -ENOMEM;
 103         }
 104         dbg("%s - Privates buffers allocation success", __func__);
 105         return 0;
 106 }
 107
 108 static int iuu_startup(struct usb_serial *serial)
 109 {
 110         struct iuu_private *priv;
 111         priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
 112         dbg("%s- priv allocation success", __func__);
 113         if (!priv)
 114                 return -ENOMEM;
 115         if (iuu_alloc_buf(priv)) {
 116                 kfree(priv);
 117                 return -ENOMEM;
 118         }
 119         spin_lock_init(&priv->lock);
 120         init_waitqueue_head(&priv->delta_msr_wait);
 121         usb_set_serial_port_data(serial->port[0], priv);
 122         return 0;
 123 }
 124
 125 /* Shutdown function */
 126 static void iuu_shutdown(struct usb_serial *serial)
 127 {
 128         struct usb_serial_port *port = serial->port[0];
 129         struct iuu_private *priv = usb_get_serial_port_data(port);
 130         if (!port)
 131                 return;
 132
 133         dbg("%s", __func__);
 134
 135         if (priv) {
 136                 iuu_free_buf(priv);
 137                 dbg("%s - I will free all", __func__);
 138                 usb_set_serial_port_data(port, NULL);
 139
 140                 dbg("%s - priv is not anymore in port structure", __func__);
 141                 kfree(priv);
 142
 143                 dbg("%s priv is now kfree", __func__);
 144         }
 145 }
 146
 147 static int iuu_tiocmset(struct tty_struct *tty, struct file *file,
 148                         unsigned int set, unsigned int clear)
 149 {
 150         struct usb_serial_port *port = tty->driver_data;
 151         struct iuu_private *priv = usb_get_serial_port_data(port);
 152         unsigned long flags;
 153
 154         /* FIXME: locking on tiomstatus */
 155         dbg("%s (%d) msg : SET = 0x%04x, CLEAR = 0x%04x ", __func__,
 156             port->number, set, clear);
 157
 158         spin_lock_irqsave(&priv->lock, flags);
 159         if (set & TIOCM_RTS)
 160                 priv->tiostatus = TIOCM_RTS;
 161
 162         if (!(set & TIOCM_RTS) && priv->tiostatus == TIOCM_RTS) {
 163                 dbg("%s TIOCMSET RESET called !!!", __func__);
 164                 priv->reset = 1;
 165         }
 166         spin_unlock_irqrestore(&priv->lock, flags);
 167         return 0;
 168 }
 169
 170 /* This is used to provide a carrier detect mechanism
 171  * When a card is present, the response is 0x00
 172  * When no card , the reader respond with TIOCM_CD
 173  * This is known as CD autodetect mechanism
 174  */
 175 static int iuu_tiocmget(struct tty_struct *tty, struct file *file)
 176 {
 177         struct usb_serial_port *port = tty->driver_data;
 178         struct iuu_private *priv = usb_get_serial_port_data(port);
 179         unsigned long flags;
 180         int rc;
 181
 182         spin_lock_irqsave(&priv->lock, flags);
 183         rc = priv->tiostatus;
 184         spin_unlock_irqrestore(&priv->lock, flags);
 185
 186         return rc;
 187 }
 188
 189 static void iuu_rxcmd(struct urb *urb)
 190 {
 191         struct usb_serial_port *port = urb->context;
 192         int result;
 193         dbg("%s - enter", __func__);
 194
 195         if (urb->status) {
 196                 dbg("%s - urb->status = %d", __func__, urb->status);
 197                 /* error stop all */
 198                 return;
 199         }
 200
 201
 202         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
 203         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 204                           usb_sndbulkpipe(port->serial->dev,
 205                                           port->bulk_out_endpointAddress),
 206                           port->write_urb->transfer_buffer, 1,
 207                           read_rxcmd_callback, port);
 208         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 209 }
 210
 211 static int iuu_reset(struct usb_serial_port *port, u8 wt)
 212 {
 213         struct iuu_private *priv = usb_get_serial_port_data(port);
 214         int result;
 215         char *buf_ptr = port->write_urb->transfer_buffer;
 216         dbg("%s - enter", __func__);
 217
 218         /* Prepare the reset sequence */
 219
 220         *buf_ptr++ = IUU_RST_SET;
 221         *buf_ptr++ = IUU_DELAY_MS;
 222         *buf_ptr++ = wt;
 223         *buf_ptr = IUU_RST_CLEAR;
 224
 225         /* send the sequence */
 226
 227         usb_fill_bulk_urb(port->write_urb,
 228                           port->serial->dev,
 229                           usb_sndbulkpipe(port->serial->dev,
 230                                           port->bulk_out_endpointAddress),
 231                           port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
 232         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 233         priv->reset = 0;
 234         return result;
 235 }
 236
 237 /* Status Function
 238  * Return value is
 239  * 0x00 = no card
 240  * 0x01 = smartcard
 241  * 0x02 = sim card
 242  */
 243 static void iuu_update_status_callback(struct urb *urb)
 244 {
 245         struct usb_serial_port *port = urb->context;
 246         struct iuu_private *priv = usb_get_serial_port_data(port);
 247         u8 *st;
 248         dbg("%s - enter", __func__);
 249
 250         if (urb->status) {
 251                 dbg("%s - urb->status = %d", __func__, urb->status);
 252                 /* error stop all */
 253                 return;
 254         }
 255
 256         st = urb->transfer_buffer;
 257         dbg("%s - enter", __func__);
 258         if (urb->actual_length == 1) {
 259                 switch (st[0]) {
 260                 case 0x1:
 261                         priv->tiostatus = iuu_cardout;
 262                         break;
 263                 case 0x0:
 264                         priv->tiostatus = iuu_cardin;
 265                         break;
 266                 default:
 267                         priv->tiostatus = iuu_cardin;
 268                 }
 269         }
 270         iuu_rxcmd(urb);
 271 }
 272
 273 static void iuu_status_callback(struct urb *urb)
 274 {
 275         struct usb_serial_port *port = urb->context;
 276         int result;
 277         dbg("%s - enter", __func__);
 278
 279         dbg("%s - urb->status = %d", __func__, urb->status);
 280         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 281                           usb_rcvbulkpipe(port->serial->dev,
 282                                           port->bulk_in_endpointAddress),
 283                           port->read_urb->transfer_buffer, 256,
 284                           iuu_update_status_callback, port);
 285         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 286 }
 287
 288 static int iuu_status(struct usb_serial_port *port)
 289 {
 290         int result;
 291
 292         dbg("%s - enter", __func__);
 293
 294         memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
 295         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 296                           usb_sndbulkpipe(port->serial->dev,
 297                                           port->bulk_out_endpointAddress),
 298                           port->write_urb->transfer_buffer, 1,
 299                           iuu_status_callback, port);
 300         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 301         return result;
 302
 303 }
 304
 305 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 306 {
 307         int status;
 308         struct usb_serial *serial = port->serial;
 309         int actual = 0;
 310
 311         dbg("%s - enter", __func__);
 312
 313         /* send the data out the bulk port */
 314
 315         status =
 316             usb_bulk_msg(serial->dev,
 317                          usb_sndbulkpipe(serial->dev,
 318                                          port->bulk_out_endpointAddress), buf,
 319                          count, &actual, HZ * 1);
 320
 321         if (status != IUU_OPERATION_OK)
 322                 dbg("%s - error = %2x", __func__, status);
 323         else
 324                 dbg("%s - write OK !", __func__);
 325         return status;
 326 }
 327
 328 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 329 {
 330         int status;
 331         struct usb_serial *serial = port->serial;
 332         int actual = 0;
 333
 334         dbg("%s - enter", __func__);
 335
 336         /* send the data out the bulk port */
 337
 338         status =
 339             usb_bulk_msg(serial->dev,
 340                          usb_rcvbulkpipe(serial->dev,
 341                                          port->bulk_in_endpointAddress), buf,
 342                          count, &actual, HZ * 1);
 343
 344         if (status != IUU_OPERATION_OK)
 345                 dbg("%s - error = %2x", __func__, status);
 346         else
 347                 dbg("%s - read OK !", __func__);
 348         return status;
 349 }
 350
 351 static int iuu_led(struct usb_serial_port *port, unsigned int R,
 352                    unsigned int G, unsigned int B, u8 f)
 353 {
 354         int status;
 355         u8 *buf;
 356         buf = kmalloc(8, GFP_KERNEL);
 357         if (!buf)
 358                 return -ENOMEM;
 359
 360         dbg("%s - enter", __func__);
 361
 362         buf[0] = IUU_SET_LED;
 363         buf[1] = R & 0xFF;
 364         buf[2] = (R >> 8) & 0xFF;
 365         buf[3] = G & 0xFF;
 366         buf[4] = (G >> 8) & 0xFF;
 367         buf[5] = B & 0xFF;
 368         buf[6] = (B >> 8) & 0xFF;
 369         buf[7] = f;
 370         status = bulk_immediate(port, buf, 8);
 371         kfree(buf);
 372         if (status != IUU_OPERATION_OK)
 373                 dbg("%s - led error status = %2x", __func__, status);
 374         else
 375                 dbg("%s - led OK !", __func__);
 376         return IUU_OPERATION_OK;
 377 }
 378
 379 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
 380                                  u8 b2, u8 freq)
 381 {
 382         *buf++ = IUU_SET_LED;
 383         *buf++ = r1;
 384         *buf++ = r2;
 385         *buf++ = g1;
 386         *buf++ = g2;
 387         *buf++ = b1;
 388         *buf++ = b2;
 389         *buf = freq;
 390 }
 391
 392 static void iuu_led_activity_on(struct urb *urb)
 393 {
 394         struct usb_serial_port *port = urb->context;
 395         int result;
 396         char *buf_ptr = port->write_urb->transfer_buffer;
 397         *buf_ptr++ = IUU_SET_LED;
 398         if (xmas == 1) {
 399                 get_random_bytes(buf_ptr, 6);
 400                 *(buf_ptr+7) = 1;
 401         } else {
 402                 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
 403         }
 404
 405         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 406                           usb_sndbulkpipe(port->serial->dev,
 407                                           port->bulk_out_endpointAddress),
 408                           port->write_urb->transfer_buffer, 8 ,
 409                           iuu_rxcmd, port);
 410         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 411 }
 412
 413 static void iuu_led_activity_off(struct urb *urb)
 414 {
 415         struct usb_serial_port *port = urb->context;
 416         int result;
 417         char *buf_ptr = port->write_urb->transfer_buffer;
 418         if (xmas == 1) {
 419                 iuu_rxcmd(urb);
 420                 return;
 421         } else {
 422                 *buf_ptr++ = IUU_SET_LED;
 423                 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
 424         }
 425         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 426                           usb_sndbulkpipe(port->serial->dev,
 427                                           port->bulk_out_endpointAddress),
 428                           port->write_urb->transfer_buffer, 8 ,
 429                           iuu_rxcmd, port);
 430         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 431 }
 432
 433
 434
 435 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
 436 {
 437         int status;
 438         struct iuu_private *priv = usb_get_serial_port_data(port);
 439         int Count = 0;
 440         u8 FrqGenAdr = 0x69;
 441         u8 DIV = 0;             /* 8bit */
 442         u8 XDRV = 0;            /* 8bit */
 443         u8 PUMP = 0;            /* 3bit */
 444         u8 PBmsb = 0;           /* 2bit */
 445         u8 PBlsb = 0;           /* 8bit */
 446         u8 PO = 0;              /* 1bit */
 447         u8 Q = 0;               /* 7bit */
 448         /* 24bit = 3bytes */
 449         unsigned int P = 0;
 450         unsigned int P2 = 0;
 451         int frq = (int)dwFrq;
 452
 453         dbg("%s - enter", __func__);
 454
 455         if (frq == 0) {
 456                 priv->buf[Count++] = IUU_UART_WRITE_I2C;
 457                 priv->buf[Count++] = FrqGenAdr << 1;
 458                 priv->buf[Count++] = 0x09;
 459                 priv->buf[Count++] = 0x00;
 460
 461                 status = bulk_immediate(port, (u8 *) priv->buf, Count);
 462                 if (status != 0) {
 463                         dbg("%s - write error ", __func__);
 464                         return status;
 465                 }
 466         } else if (frq == 3579000) {
 467                 DIV = 100;
 468                 P = 1193;
 469                 Q = 40;
 470                 XDRV = 0;
 471         } else if (frq == 3680000) {
 472                 DIV = 105;
 473                 P = 161;
 474                 Q = 5;
 475                 XDRV = 0;
 476         } else if (frq == 6000000) {
 477                 DIV = 66;
 478                 P = 66;
 479                 Q = 2;
 480                 XDRV = 0x28;
 481         } else {
 482                 unsigned int result = 0;
 483                 unsigned int tmp = 0;
 484                 unsigned int check;
 485                 unsigned int check2;
 486                 char found = 0x00;
 487                 unsigned int lQ = 2;
 488                 unsigned int lP = 2055;
 489                 unsigned int lDiv = 4;
 490
 491                 for (lQ = 2; lQ <= 47 && !found; lQ++)
 492                         for (lP = 2055; lP >= 8 && !found; lP--)
 493                                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
 494                                         tmp = (12000000 / lDiv) * (lP / lQ);
 495                                         if (abs((int)(tmp - frq)) <
 496                                             abs((int)(frq - result))) {
 497                                                 check2 = (12000000 / lQ);
 498                                                 if (check2 < 250000)
 499                                                         continue;
 500                                                 check = (12000000 / lQ) * lP;
 501                                                 if (check > 400000000)
 502                                                         continue;
 503                                                 if (check < 100000000)
 504                                                         continue;
 505                                                 if (lDiv < 4 || lDiv > 127)
 506                                                         continue;
 507                                                 result = tmp;
 508                                                 P = lP;
 509                                                 DIV = lDiv;
 510                                                 Q = lQ;
 511                                                 if (result == frq)
 512                                                         found = 0x01;
 513                                         }
 514                                 }
 515         }
 516         P2 = ((P - PO) / 2) - 4;
 517         DIV = DIV;
 518         PUMP = 0x04;
 519         PBmsb = (P2 >> 8 & 0x03);
 520         PBlsb = P2 & 0xFF;
 521         PO = (P >> 10) & 0x01;
 522         Q = Q - 2;
 523
 524         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 525         priv->buf[Count++] = FrqGenAdr << 1;
 526         priv->buf[Count++] = 0x09;
 527         priv->buf[Count++] = 0x20;      /* Adr = 0x09 */
 528         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 529         priv->buf[Count++] = FrqGenAdr << 1;
 530         priv->buf[Count++] = 0x0C;
 531         priv->buf[Count++] = DIV;       /* Adr = 0x0C */
 532         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 533         priv->buf[Count++] = FrqGenAdr << 1;
 534         priv->buf[Count++] = 0x12;
 535         priv->buf[Count++] = XDRV;      /* Adr = 0x12 */
 536         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 537         priv->buf[Count++] = FrqGenAdr << 1;
 538         priv->buf[Count++] = 0x13;
 539         priv->buf[Count++] = 0x6B;      /* Adr = 0x13 */
 540         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 541         priv->buf[Count++] = FrqGenAdr << 1;
 542         priv->buf[Count++] = 0x40;
 543         priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
 544                              (PBmsb & 0x03);    /* Adr = 0x40 */
 545         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 546         priv->buf[Count++] = FrqGenAdr << 1;
 547         priv->buf[Count++] = 0x41;
 548         priv->buf[Count++] = PBlsb;     /* Adr = 0x41 */
 549         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 550         priv->buf[Count++] = FrqGenAdr << 1;
 551         priv->buf[Count++] = 0x42;
 552         priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
 553         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 554         priv->buf[Count++] = FrqGenAdr << 1;
 555         priv->buf[Count++] = 0x44;
 556         priv->buf[Count++] = (char)0xFF;        /* Adr = 0x44 */
 557         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 558         priv->buf[Count++] = FrqGenAdr << 1;
 559         priv->buf[Count++] = 0x45;
 560         priv->buf[Count++] = (char)0xFE;        /* Adr = 0x45 */
 561         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 562         priv->buf[Count++] = FrqGenAdr << 1;
 563         priv->buf[Count++] = 0x46;
 564         priv->buf[Count++] = 0x7F;      /* Adr = 0x46 */
 565         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 566         priv->buf[Count++] = FrqGenAdr << 1;
 567         priv->buf[Count++] = 0x47;
 568         priv->buf[Count++] = (char)0x84;        /* Adr = 0x47 */
 569
 570         status = bulk_immediate(port, (u8 *) priv->buf, Count);
 571         if (status != IUU_OPERATION_OK)
 572                 dbg("%s - write error ", __func__);
 573         return status;
 574 }
 575
 576 static int iuu_uart_flush(struct usb_serial_port *port)
 577 {
 578         int i;
 579         int status;
 580         u8 rxcmd = IUU_UART_RX;
 581         struct iuu_private *priv = usb_get_serial_port_data(port);
 582
 583         dbg("%s - enter", __func__);
 584
 585         if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
 586                 return -EIO;
 587
 588         for (i = 0; i < 2; i++) {
 589                 status = bulk_immediate(port, &rxcmd, 1);
 590                 if (status != IUU_OPERATION_OK) {
 591                         dbg("%s - uart_flush_write error", __func__);
 592                         return status;
 593                 }
 594
 595                 status = read_immediate(port, &priv->len, 1);
 596                 if (status != IUU_OPERATION_OK) {
 597                         dbg("%s - uart_flush_read error", __func__);
 598                         return status;
 599                 }
 600
 601                 if (priv->len > 0) {
 602                         dbg("%s - uart_flush datalen is : %i ", __func__,
 603                             priv->len);
 604                         status = read_immediate(port, priv->buf, priv->len);
 605                         if (status != IUU_OPERATION_OK) {
 606                                 dbg("%s - uart_flush_read error", __func__);
 607                                 return status;
 608                         }
 609                 }
 610         }
 611         dbg("%s - uart_flush_read OK!", __func__);
 612         iuu_led(port, 0, 0xF000, 0, 0xFF);
 613         return status;
 614 }
 615
 616 static void read_buf_callback(struct urb *urb)
 617 {
 618         struct usb_serial_port *port = urb->context;
 619         unsigned char *data = urb->transfer_buffer;
 620         struct tty_struct *tty;
 621         dbg("%s - urb->status = %d", __func__, urb->status);
 622
 623         if (urb->status) {
 624                 dbg("%s - urb->status = %d", __func__, urb->status);
 625                 if (urb->status == -EPROTO) {
 626                         /* reschedule needed */
 627                 }
 628                 return;
 629         }
 630
 631         dbg("%s - %i chars to write", __func__, urb->actual_length);
 632         tty = port->port.tty;
 633         if (data == NULL)
 634                 dbg("%s - data is NULL !!!", __func__);
 635         if (tty && urb->actual_length && data) {
 636                 tty_insert_flip_string(tty, data, urb->actual_length);
 637                 tty_flip_buffer_push(tty);
 638         }
 639         iuu_led_activity_on(urb);
 640 }
 641
 642 static int iuu_bulk_write(struct usb_serial_port *port)
 643 {
 644         struct iuu_private *priv = usb_get_serial_port_data(port);
 645         unsigned long flags;
 646         int result;
 647         int i;
 648         char *buf_ptr = port->write_urb->transfer_buffer;
 649         dbg("%s - enter", __func__);
 650
 651         *buf_ptr++ = IUU_UART_ESC;
 652         *buf_ptr++ = IUU_UART_TX;
 653         *buf_ptr++ = priv->writelen;
 654
 655         memcpy(buf_ptr, priv->writebuf,
 656                priv->writelen);
 657         if (debug == 1) {
 658                 for (i = 0; i < priv->writelen; i++)
 659                         sprintf(priv->dbgbuf + i*2 ,
 660                                 "%02X", priv->writebuf[i]);
 661                 priv->dbgbuf[priv->writelen+i*2] = 0;
 662                 dbg("%s - writing %i chars : %s", __func__,
 663                     priv->writelen, priv->dbgbuf);
 664         }
 665         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 666                           usb_sndbulkpipe(port->serial->dev,
 667                                           port->bulk_out_endpointAddress),
 668                           port->write_urb->transfer_buffer, priv->writelen + 3,
 669                           iuu_rxcmd, port);
 670         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 671         spin_lock_irqsave(&priv->lock, flags);
 672         priv->writelen = 0;
 673         spin_unlock_irqrestore(&priv->lock, flags);
 674         usb_serial_port_softint(port);
 675         return result;
 676 }
 677
 678 static int iuu_read_buf(struct usb_serial_port *port, int len)
 679 {
 680         int result;
 681         dbg("%s - enter", __func__);
 682
 683         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 684                           usb_rcvbulkpipe(port->serial->dev,
 685                                           port->bulk_in_endpointAddress),
 686                           port->read_urb->transfer_buffer, len,
 687                           read_buf_callback, port);
 688         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 689         return result;
 690 }
 691
 692 static void iuu_uart_read_callback(struct urb *urb)
 693 {
 694         struct usb_serial_port *port = urb->context;
 695         struct iuu_private *priv = usb_get_serial_port_data(port);
 696         unsigned long flags;
 697         int status;
 698         int error = 0;
 699         int len = 0;
 700         unsigned char *data = urb->transfer_buffer;
 701         priv->poll++;
 702
 703         dbg("%s - enter", __func__);
 704
 705         if (urb->status) {
 706                 dbg("%s - urb->status = %d", __func__, urb->status);
 707                 /* error stop all */
 708                 return;
 709         }
 710         if (data == NULL)
 711                 dbg("%s - data is NULL !!!", __func__);
 712
 713         if (urb->actual_length == 1  && data != NULL)
 714                 len = (int) data[0];
 715
 716         if (urb->actual_length > 1) {
 717                 dbg("%s - urb->actual_length = %i", __func__,
 718                     urb->actual_length);
 719                 error = 1;
 720                 return;
 721         }
 722         /* if len > 0 call readbuf */
 723
 724         if (len > 0 && error == 0) {
 725                 dbg("%s - call read buf - len to read is %i ",
 726                         __func__, len);
 727                 status = iuu_read_buf(port, len);
 728                 return;
 729         }
 730         /* need to update status  ? */
 731         if (priv->poll > 99) {
 732                 status = iuu_status(port);
 733                 priv->poll = 0;
 734                 return;
 735         }
 736
 737         /* reset waiting ? */
 738
 739         if (priv->reset == 1) {
 740                 status = iuu_reset(port, 0xC);
 741                 return;
 742         }
 743         /* Writebuf is waiting */
 744         spin_lock_irqsave(&priv->lock, flags);
 745         if (priv->writelen > 0) {
 746                 spin_unlock_irqrestore(&priv->lock, flags);
 747                 status = iuu_bulk_write(port);
 748                 return;
 749         }
 750         spin_unlock_irqrestore(&priv->lock, flags);
 751         /* if nothing to write call again rxcmd */
 752         dbg("%s - rxcmd recall", __func__);
 753         iuu_led_activity_off(urb);
 754 }
 755
 756 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
 757                           const u8 *buf, int count)
 758 {
 759         struct iuu_private *priv = usb_get_serial_port_data(port);
 760         unsigned long flags;
 761         dbg("%s - enter", __func__);
 762
 763         if (count > 256)
 764                 return -ENOMEM;
 765
 766         spin_lock_irqsave(&priv->lock, flags);
 767         if (priv->writelen > 0) {
 768                 /* buffer already filled but not commited */
 769                 spin_unlock_irqrestore(&priv->lock, flags);
 770                 return 0;
 771         }
 772         /* fill the buffer */
 773         memcpy(priv->writebuf, buf, count);
 774         priv->writelen = count;
 775         spin_unlock_irqrestore(&priv->lock, flags);
 776
 777         return count;
 778 }
 779
 780 static void read_rxcmd_callback(struct urb *urb)
 781 {
 782         struct usb_serial_port *port = urb->context;
 783         int result;
 784         dbg("%s - enter", __func__);
 785
 786         dbg("%s - urb->status = %d", __func__, urb->status);
 787
 788         if (urb->status) {
 789                 dbg("%s - urb->status = %d", __func__, urb->status);
 790                 /* error stop all */
 791                 return;
 792         }
 793
 794         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 795                           usb_rcvbulkpipe(port->serial->dev,
 796                                           port->bulk_in_endpointAddress),
 797                           port->read_urb->transfer_buffer, 256,
 798                           iuu_uart_read_callback, port);
 799         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 800         dbg("%s - submit result = %d", __func__, result);
 801         return;
 802 }
 803
 804 static int iuu_uart_on(struct usb_serial_port *port)
 805 {
 806         int status;
 807         u8 *buf;
 808
 809         buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
 810
 811         if (!buf)
 812                 return -ENOMEM;
 813
 814         buf[0] = IUU_UART_ENABLE;
 815         buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
 816         buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
 817         buf[3] = (u8) (0x0F0 & IUU_TWO_STOP_BITS) | (0x07 & IUU_PARITY_EVEN);
 818
 819         status = bulk_immediate(port, buf, 4);
 820         if (status != IUU_OPERATION_OK) {
 821                 dbg("%s - uart_on error", __func__);
 822                 goto uart_enable_failed;
 823         }
 824         /*  iuu_reset() the card after iuu_uart_on() */
 825         status = iuu_uart_flush(port);
 826         if (status != IUU_OPERATION_OK)
 827                 dbg("%s - uart_flush error", __func__);
 828 uart_enable_failed:
 829         kfree(buf);
 830         return status;
 831 }
 832
 833 /*  Diables the IUU UART (a.k.a. the Phoenix voiderface) */
 834 static int iuu_uart_off(struct usb_serial_port *port)
 835 {
 836         int status;
 837         u8 *buf;
 838         buf = kmalloc(1, GFP_KERNEL);
 839         if (!buf)
 840                 return -ENOMEM;
 841         buf[0] = IUU_UART_DISABLE;
 842
 843         status = bulk_immediate(port, buf, 1);
 844         if (status != IUU_OPERATION_OK)
 845                 dbg("%s - uart_off error", __func__);
 846
 847         kfree(buf);
 848         return status;
 849 }
 850
 851 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud,
 852                          u32 *actual, u8 parity)
 853 {
 854         int status;
 855         u8 *dataout;
 856         u8 DataCount = 0;
 857         u8 T1Frekvens = 0;
 858         u8 T1reload = 0;
 859         unsigned int T1FrekvensHZ = 0;
 860
 861         dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
 862
 863         if (!dataout)
 864                 return -ENOMEM;
 865
 866         if (baud < 1200 || baud > 230400) {
 867                 kfree(dataout);
 868                 return IUU_INVALID_PARAMETER;
 869         }
 870         if (baud > 977) {
 871                 T1Frekvens = 3;
 872                 T1FrekvensHZ = 500000;
 873         }
 874
 875         if (baud > 3906) {
 876                 T1Frekvens = 2;
 877                 T1FrekvensHZ = 2000000;
 878         }
 879
 880         if (baud > 11718) {
 881                 T1Frekvens = 1;
 882                 T1FrekvensHZ = 6000000;
 883         }
 884
 885         if (baud > 46875) {
 886                 T1Frekvens = 0;
 887                 T1FrekvensHZ = 24000000;
 888         }
 889
 890         T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
 891
 892         /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
 893         dataout[DataCount++] = IUU_UART_ESC;
 894         /*  magic number here:  CHANGE_BAUD; */
 895         dataout[DataCount++] = IUU_UART_CHANGE;
 896         dataout[DataCount++] = T1Frekvens;
 897         dataout[DataCount++] = T1reload;
 898
 899         *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
 900
 901         switch (parity & 0x0F) {
 902         case IUU_PARITY_NONE:
 903                 dataout[DataCount++] = 0x00;
 904                 break;
 905         case IUU_PARITY_EVEN:
 906                 dataout[DataCount++] = 0x01;
 907                 break;
 908         case IUU_PARITY_ODD:
 909                 dataout[DataCount++] = 0x02;
 910                 break;
 911         case IUU_PARITY_MARK:
 912                 dataout[DataCount++] = 0x03;
 913                 break;
 914         case IUU_PARITY_SPACE:
 915                 dataout[DataCount++] = 0x04;
 916                 break;
 917         default:
 918                 kfree(dataout);
 919                 return IUU_INVALID_PARAMETER;
 920                 break;
 921         }
 922
 923         switch (parity & 0xF0) {
 924         case IUU_ONE_STOP_BIT:
 925                 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
 926                 break;
 927
 928         case IUU_TWO_STOP_BITS:
 929                 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 930                 break;
 931         default:
 932                 kfree(dataout);
 933                 return IUU_INVALID_PARAMETER;
 934                 break;
 935         }
 936
 937         status = bulk_immediate(port, dataout, DataCount);
 938         if (status != IUU_OPERATION_OK)
 939                 dbg("%s - uart_off error", __func__);
 940         kfree(dataout);
 941         return status;
 942 }
 943
 944 static int set_control_lines(struct usb_device *dev, u8 value)
 945 {
 946         return 0;
 947 }
 948
 949 static void iuu_close(struct tty_struct *tty,
 950                         struct usb_serial_port *port, struct file *filp)
 951 {
 952         /* iuu_led (port,255,0,0,0); */
 953         struct usb_serial *serial;
 954         struct iuu_private *priv = usb_get_serial_port_data(port);
 955         unsigned long flags;
 956         unsigned int c_cflag;
 957
 958         serial = port->serial;
 959         if (!serial)
 960                 return;
 961
 962         dbg("%s - port %d", __func__, port->number);
 963
 964         iuu_uart_off(port);
 965         if (serial->dev) {
 966                 if (tty) {
 967                         c_cflag = tty->termios->c_cflag;
 968                         if (c_cflag & HUPCL) {
 969                                 /* drop DTR and RTS */
 970                                 priv = usb_get_serial_port_data(port);
 971                                 spin_lock_irqsave(&priv->lock, flags);
 972                                 priv->line_control = 0;
 973                                 spin_unlock_irqrestore(&priv->lock, flags);
 974                                 set_control_lines(port->serial->dev, 0);
 975                         }
 976                 }
 977                 /* free writebuf */
 978                 /* shutdown our urbs */
 979                 dbg("%s - shutting down urbs", __func__);
 980                 usb_kill_urb(port->write_urb);
 981                 usb_kill_urb(port->read_urb);
 982                 usb_kill_urb(port->interrupt_in_urb);
 983                 msleep(1000);
 984                 /* wait one second to free all buffers */
 985                 iuu_led(port, 0, 0, 0xF000, 0xFF);
 986                 msleep(1000);
 987                 usb_reset_device(port->serial->dev);
 988         }
 989 }
 990
 991 static int iuu_open(struct tty_struct *tty,
 992                         struct usb_serial_port *port, struct file *filp)
 993 {
 994         struct usb_serial *serial = port->serial;
 995         u8 *buf;
 996         int result;
 997         u32 actual;
 998         unsigned long flags;
 999         struct iuu_private *priv = usb_get_serial_port_data(port);
1000
1001         dbg("%s -  port %d", __func__, port->number);
1002         usb_clear_halt(serial->dev, port->write_urb->pipe);
1003         usb_clear_halt(serial->dev, port->read_urb->pipe);
1004
1005         buf = kmalloc(10, GFP_KERNEL);
1006         if (buf == NULL)
1007                 return -ENOMEM;
1008
1009         /* fixup the endpoint buffer size */
1010         kfree(port->bulk_out_buffer);
1011         port->bulk_out_buffer = kmalloc(512, GFP_KERNEL);
1012         port->bulk_out_size = 512;
1013         kfree(port->bulk_in_buffer);
1014         port->bulk_in_buffer = kmalloc(512, GFP_KERNEL);
1015         port->bulk_in_size = 512;
1016
1017         if (!port->bulk_out_buffer || !port->bulk_in_buffer) {
1018                 kfree(port->bulk_out_buffer);
1019                 kfree(port->bulk_in_buffer);
1020                 kfree(buf);
1021                 return -ENOMEM;
1022         }
1023
1024         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1025                           usb_sndbulkpipe(port->serial->dev,
1026                                           port->bulk_out_endpointAddress),
1027                           port->bulk_out_buffer, 512,
1028                           NULL, NULL);
1029
1030
1031         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1032                           usb_rcvbulkpipe(port->serial->dev,
1033                                           port->bulk_in_endpointAddress),
1034                           port->bulk_in_buffer, 512,
1035                           NULL, NULL);
1036
1037         /* set the termios structure */
1038         spin_lock_irqsave(&priv->lock, flags);
1039         if (tty && !priv->termios_initialized) {
1040                 *(tty->termios) = tty_std_termios;
1041                 tty->termios->c_cflag = CLOCAL | CREAD | CS8 | B9600
1042                                         | TIOCM_CTS | CSTOPB | PARENB;
1043                 tty->termios->c_ispeed = 9600;
1044                 tty->termios->c_ospeed = 9600;
1045                 tty->termios->c_lflag = 0;
1046                 tty->termios->c_oflag = 0;
1047                 tty->termios->c_iflag = 0;
1048                 priv->termios_initialized = 1;
1049                 tty->low_latency = 1;
1050                 priv->poll = 0;
1051          }
1052         spin_unlock_irqrestore(&priv->lock, flags);
1053
1054         /* initialize writebuf */
1055 #define FISH(a, b, c, d) do { \
1056         result = usb_control_msg(port->serial->dev,     \
1057                                 usb_rcvctrlpipe(port->serial->dev, 0),  \
1058                                 b, a, c, d, buf, 1, 1000); \
1059         dbg("0x%x:0x%x:0x%x:0x%x  %d - %x", a, b, c, d, result, \
1060                                 buf[0]); } while (0);
1061
1062 #define SOUP(a, b, c, d)  do { \
1063         result = usb_control_msg(port->serial->dev,     \
1064                                 usb_sndctrlpipe(port->serial->dev, 0),  \
1065                                 b, a, c, d, NULL, 0, 1000); \
1066         dbg("0x%x:0x%x:0x%x:0x%x  %d", a, b, c, d, result); } while (0)
1067
1068         /*  This is not UART related but IUU USB driver related or something */
1069         /*  like that. Basically no IUU will accept any commands from the USB */
1070         /*  host unless it has received the following message */
1071         /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1072
1073         SOUP(0x03, 0x02, 0x02, 0x0);
1074         kfree(buf);
1075         iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1076         iuu_uart_on(port);
1077         if (boost < 100)
1078                 boost = 100;
1079         switch (clockmode) {
1080         case 2:         /*  3.680 Mhz */
1081                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1082                 result =
1083                     iuu_uart_baud(port, 9600 * boost / 100, &actual,
1084                                   IUU_PARITY_EVEN);
1085                 break;
1086         case 3:         /*  6.00 Mhz */
1087                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1088                 result =
1089                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
1090                                   IUU_PARITY_EVEN);
1091                 break;
1092         default:                /*  3.579 Mhz */
1093                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1094                 result =
1095                     iuu_uart_baud(port, 9600 * boost / 100, &actual,
1096                                   IUU_PARITY_EVEN);
1097         }
1098
1099         /* set the cardin cardout signals */
1100         switch (cdmode) {
1101         case 0:
1102                 iuu_cardin = 0;
1103                 iuu_cardout = 0;
1104                 break;
1105         case 1:
1106                 iuu_cardin = TIOCM_CD;
1107                 iuu_cardout =  0;
1108                 break;
1109         case 2:
1110                 iuu_cardin = 0;
1111                 iuu_cardout = TIOCM_CD;
1112                 break;
1113         case 3:
1114                 iuu_cardin = TIOCM_DSR;
1115                 iuu_cardout = 0;
1116                 break;
1117         case 4:
1118                 iuu_cardin = 0;
1119                 iuu_cardout = TIOCM_DSR;
1120                 break;
1121         case 5:
1122                 iuu_cardin = TIOCM_CTS;
1123                 iuu_cardout = 0;
1124                 break;
1125         case 6:
1126                 iuu_cardin = 0;
1127                 iuu_cardout = TIOCM_CTS;
1128                 break;
1129         case 7:
1130                 iuu_cardin = TIOCM_RNG;
1131                 iuu_cardout = 0;
1132                 break;
1133         case 8:
1134                 iuu_cardin = 0;
1135                 iuu_cardout = TIOCM_RNG;
1136         }
1137
1138         iuu_uart_flush(port);
1139
1140         dbg("%s - initialization done", __func__);
1141
1142         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1143         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1144                           usb_sndbulkpipe(port->serial->dev,
1145                                           port->bulk_out_endpointAddress),
1146                           port->write_urb->transfer_buffer, 1,
1147                           read_rxcmd_callback, port);
1148         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1149
1150         if (result) {
1151                 dev_err(&port->dev, "%s - failed submitting read urb,"
1152                         " error %d\n", __func__, result);
1153                 iuu_close(tty, port, NULL);
1154                 return -EPROTO;
1155         } else {
1156                 dbg("%s - rxcmd OK", __func__);
1157         }
1158         return result;
1159 }
1160
1161 static struct usb_serial_driver iuu_device = {
1162         .driver = {
1163                    .owner = THIS_MODULE,
1164                    .name = "iuu_phoenix",
1165                    },
1166         .id_table = id_table,
1167         .num_ports = 1,
1168         .open = iuu_open,
1169         .close = iuu_close,
1170         .write = iuu_uart_write,
1171         .read_bulk_callback = iuu_uart_read_callback,
1172         .tiocmget = iuu_tiocmget,
1173         .tiocmset = iuu_tiocmset,
1174         .attach = iuu_startup,
1175         .shutdown = iuu_shutdown,
1176 };
1177
1178 static int __init iuu_init(void)
1179 {
1180         int retval;
1181         retval = usb_serial_register(&iuu_device);
1182         if (retval)
1183                 goto failed_usb_serial_register;
1184         retval = usb_register(&iuu_driver);
1185         if (retval)
1186                 goto failed_usb_register;
1187         info(DRIVER_DESC " " DRIVER_VERSION);
1188         return 0;
1189 failed_usb_register:
1190         usb_serial_deregister(&iuu_device);
1191 failed_usb_serial_register:
1192         return retval;
1193 }
1194
1195 static void __exit iuu_exit(void)
1196 {
1197         usb_deregister(&iuu_driver);
1198         usb_serial_deregister(&iuu_device);
1199 }
1200
1201 module_init(iuu_init);
1202 module_exit(iuu_exit);
1203
1204 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1205
1206 MODULE_DESCRIPTION(DRIVER_DESC);
1207 MODULE_LICENSE("GPL");
1208
1209 MODULE_VERSION(DRIVER_VERSION);
1210 module_param(debug, bool, S_IRUGO | S_IWUSR);
1211 MODULE_PARM_DESC(debug, "Debug enabled or not");
1212
1213 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1214 MODULE_PARM_DESC(xmas, "xmas color enabled or not");
1215
1216 module_param(boost, int, S_IRUGO | S_IWUSR);
1217 MODULE_PARM_DESC(boost, "overclock boost percent 100 to 500");
1218
1219 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1220 MODULE_PARM_DESC(clockmode, "1=3Mhz579,2=3Mhz680,3=6Mhz");
1221
1222 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1223 MODULE_PARM_DESC(cdmode, "Card detect mode 0=none, 1=CD, 2=!CD, 3=DSR, "
1224                  "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING");