kernel/drivers/usb/serial/iuu_phoenix.c

   1 /*
   2  * Infinity Unlimited USB Phoenix driver
   3  *
   4  * Copyright (C) 2010 James Courtier-Dutton (James@superbug.co.uk)
   5
   6  * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
   7  *
   8  * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos BorrÃ¡s)
   9  *
  10  *      This program is free software; you can redistribute it and/or modify
  11  *      it under the terms of the GNU General Public License as published by
  12  *      the Free Software Foundation; either version 2 of the License, or
  13  *      (at your option) any later version.
  14  *
  15  *  And tested with help of WB Electronics
  16  *
  17  */
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/slab.h>
  21 #include <linux/tty.h>
  22 #include <linux/tty_driver.h>
  23 #include <linux/tty_flip.h>
  24 #include <linux/serial.h>
  25 #include <linux/module.h>
  26 #include <linux/moduleparam.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/usb.h>
  30 #include <linux/usb/serial.h>
  31 #include "iuu_phoenix.h"
  32 #include <linux/random.h>
  33
  34 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
  35
  36 static const struct usb_device_id id_table[] = {
  37         {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
  38         {}                      /* Terminating entry */
  39 };
  40 MODULE_DEVICE_TABLE(usb, id_table);
  41
  42 /* turbo parameter */
  43 static int boost = 100;
  44 static int clockmode = 1;
  45 static int cdmode = 1;
  46 static int iuu_cardin;
  47 static int iuu_cardout;
  48 static bool xmas;
  49 static int vcc_default = 5;
  50
  51 static int iuu_create_sysfs_attrs(struct usb_serial_port *port);
  52 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port);
  53 static void read_rxcmd_callback(struct urb *urb);
  54
  55 struct iuu_private {
  56         spinlock_t lock;        /* store irq state */
  57         u8 line_status;
  58         int tiostatus;          /* store IUART SIGNAL for tiocmget call */
  59         u8 reset;               /* if 1 reset is needed */
  60         int poll;               /* number of poll */
  61         u8 *writebuf;           /* buffer for writing to device */
  62         int writelen;           /* num of byte to write to device */
  63         u8 *buf;                /* used for initialize speed */
  64         u8 len;
  65         int vcc;                /* vcc (either 3 or 5 V) */
  66         u32 baud;
  67         u32 boost;
  68         u32 clk;
  69 };
  70
  71 static int iuu_port_probe(struct usb_serial_port *port)
  72 {
  73         struct iuu_private *priv;
  74         int ret;
  75
  76         priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
  77         if (!priv)
  78                 return -ENOMEM;
  79
  80         priv->buf = kzalloc(256, GFP_KERNEL);
  81         if (!priv->buf) {
  82                 kfree(priv);
  83                 return -ENOMEM;
  84         }
  85
  86         priv->writebuf = kzalloc(256, GFP_KERNEL);
  87         if (!priv->writebuf) {
  88                 kfree(priv->buf);
  89                 kfree(priv);
  90                 return -ENOMEM;
  91         }
  92
  93         priv->vcc = vcc_default;
  94         spin_lock_init(&priv->lock);
  95
  96         usb_set_serial_port_data(port, priv);
  97
  98         ret = iuu_create_sysfs_attrs(port);
  99         if (ret) {
 100                 kfree(priv->writebuf);
 101                 kfree(priv->buf);
 102                 kfree(priv);
 103                 return ret;
 104         }
 105
 106         return 0;
 107 }
 108
 109 static int iuu_port_remove(struct usb_serial_port *port)
 110 {
 111         struct iuu_private *priv = usb_get_serial_port_data(port);
 112
 113         iuu_remove_sysfs_attrs(port);
 114         kfree(priv->writebuf);
 115         kfree(priv->buf);
 116         kfree(priv);
 117
 118         return 0;
 119 }
 120
 121 static int iuu_tiocmset(struct tty_struct *tty,
 122                         unsigned int set, unsigned int clear)
 123 {
 124         struct usb_serial_port *port = tty->driver_data;
 125         struct iuu_private *priv = usb_get_serial_port_data(port);
 126         unsigned long flags;
 127
 128         /* FIXME: locking on tiomstatus */
 129         dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
 130                 __func__, set, clear);
 131
 132         spin_lock_irqsave(&priv->lock, flags);
 133
 134         if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
 135                 dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
 136                 priv->reset = 1;
 137         }
 138         if (set & TIOCM_RTS)
 139                 priv->tiostatus = TIOCM_RTS;
 140
 141         spin_unlock_irqrestore(&priv->lock, flags);
 142         return 0;
 143 }
 144
 145 /* This is used to provide a carrier detect mechanism
 146  * When a card is present, the response is 0x00
 147  * When no card , the reader respond with TIOCM_CD
 148  * This is known as CD autodetect mechanism
 149  */
 150 static int iuu_tiocmget(struct tty_struct *tty)
 151 {
 152         struct usb_serial_port *port = tty->driver_data;
 153         struct iuu_private *priv = usb_get_serial_port_data(port);
 154         unsigned long flags;
 155         int rc;
 156
 157         spin_lock_irqsave(&priv->lock, flags);
 158         rc = priv->tiostatus;
 159         spin_unlock_irqrestore(&priv->lock, flags);
 160
 161         return rc;
 162 }
 163
 164 static void iuu_rxcmd(struct urb *urb)
 165 {
 166         struct usb_serial_port *port = urb->context;
 167         int result;
 168         int status = urb->status;
 169
 170         if (status) {
 171                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 172                 /* error stop all */
 173                 return;
 174         }
 175
 176
 177         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
 178         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 179                           usb_sndbulkpipe(port->serial->dev,
 180                                           port->bulk_out_endpointAddress),
 181                           port->write_urb->transfer_buffer, 1,
 182                           read_rxcmd_callback, port);
 183         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 184 }
 185
 186 static int iuu_reset(struct usb_serial_port *port, u8 wt)
 187 {
 188         struct iuu_private *priv = usb_get_serial_port_data(port);
 189         int result;
 190         char *buf_ptr = port->write_urb->transfer_buffer;
 191
 192         /* Prepare the reset sequence */
 193
 194         *buf_ptr++ = IUU_RST_SET;
 195         *buf_ptr++ = IUU_DELAY_MS;
 196         *buf_ptr++ = wt;
 197         *buf_ptr = IUU_RST_CLEAR;
 198
 199         /* send the sequence */
 200
 201         usb_fill_bulk_urb(port->write_urb,
 202                           port->serial->dev,
 203                           usb_sndbulkpipe(port->serial->dev,
 204                                           port->bulk_out_endpointAddress),
 205                           port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
 206         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 207         priv->reset = 0;
 208         return result;
 209 }
 210
 211 /* Status Function
 212  * Return value is
 213  * 0x00 = no card
 214  * 0x01 = smartcard
 215  * 0x02 = sim card
 216  */
 217 static void iuu_update_status_callback(struct urb *urb)
 218 {
 219         struct usb_serial_port *port = urb->context;
 220         struct iuu_private *priv = usb_get_serial_port_data(port);
 221         u8 *st;
 222         int status = urb->status;
 223
 224         if (status) {
 225                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 226                 /* error stop all */
 227                 return;
 228         }
 229
 230         st = urb->transfer_buffer;
 231         dev_dbg(&port->dev, "%s - enter\n", __func__);
 232         if (urb->actual_length == 1) {
 233                 switch (st[0]) {
 234                 case 0x1:
 235                         priv->tiostatus = iuu_cardout;
 236                         break;
 237                 case 0x0:
 238                         priv->tiostatus = iuu_cardin;
 239                         break;
 240                 default:
 241                         priv->tiostatus = iuu_cardin;
 242                 }
 243         }
 244         iuu_rxcmd(urb);
 245 }
 246
 247 static void iuu_status_callback(struct urb *urb)
 248 {
 249         struct usb_serial_port *port = urb->context;
 250         int result;
 251         int status = urb->status;
 252
 253         dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 254         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 255                           usb_rcvbulkpipe(port->serial->dev,
 256                                           port->bulk_in_endpointAddress),
 257                           port->read_urb->transfer_buffer, 256,
 258                           iuu_update_status_callback, port);
 259         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 260 }
 261
 262 static int iuu_status(struct usb_serial_port *port)
 263 {
 264         int result;
 265
 266         memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
 267         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 268                           usb_sndbulkpipe(port->serial->dev,
 269                                           port->bulk_out_endpointAddress),
 270                           port->write_urb->transfer_buffer, 1,
 271                           iuu_status_callback, port);
 272         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 273         return result;
 274
 275 }
 276
 277 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 278 {
 279         int status;
 280         struct usb_serial *serial = port->serial;
 281         int actual = 0;
 282
 283         /* send the data out the bulk port */
 284
 285         status =
 286             usb_bulk_msg(serial->dev,
 287                          usb_sndbulkpipe(serial->dev,
 288                                          port->bulk_out_endpointAddress), buf,
 289                          count, &actual, 1000);
 290
 291         if (status != IUU_OPERATION_OK)
 292                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 293         else
 294                 dev_dbg(&port->dev, "%s - write OK !\n", __func__);
 295         return status;
 296 }
 297
 298 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 299 {
 300         int status;
 301         struct usb_serial *serial = port->serial;
 302         int actual = 0;
 303
 304         /* send the data out the bulk port */
 305         status =
 306             usb_bulk_msg(serial->dev,
 307                          usb_rcvbulkpipe(serial->dev,
 308                                          port->bulk_in_endpointAddress), buf,
 309                          count, &actual, 1000);
 310
 311         if (status != IUU_OPERATION_OK)
 312                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 313         else
 314                 dev_dbg(&port->dev, "%s - read OK !\n", __func__);
 315         return status;
 316 }
 317
 318 static int iuu_led(struct usb_serial_port *port, unsigned int R,
 319                    unsigned int G, unsigned int B, u8 f)
 320 {
 321         int status;
 322         u8 *buf;
 323         buf = kmalloc(8, GFP_KERNEL);
 324         if (!buf)
 325                 return -ENOMEM;
 326
 327         buf[0] = IUU_SET_LED;
 328         buf[1] = R & 0xFF;
 329         buf[2] = (R >> 8) & 0xFF;
 330         buf[3] = G & 0xFF;
 331         buf[4] = (G >> 8) & 0xFF;
 332         buf[5] = B & 0xFF;
 333         buf[6] = (B >> 8) & 0xFF;
 334         buf[7] = f;
 335         status = bulk_immediate(port, buf, 8);
 336         kfree(buf);
 337         if (status != IUU_OPERATION_OK)
 338                 dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
 339         else
 340                 dev_dbg(&port->dev, "%s - led OK !\n", __func__);
 341         return IUU_OPERATION_OK;
 342 }
 343
 344 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
 345                                  u8 b2, u8 freq)
 346 {
 347         *buf++ = IUU_SET_LED;
 348         *buf++ = r1;
 349         *buf++ = r2;
 350         *buf++ = g1;
 351         *buf++ = g2;
 352         *buf++ = b1;
 353         *buf++ = b2;
 354         *buf = freq;
 355 }
 356
 357 static void iuu_led_activity_on(struct urb *urb)
 358 {
 359         struct usb_serial_port *port = urb->context;
 360         int result;
 361         char *buf_ptr = port->write_urb->transfer_buffer;
 362         *buf_ptr++ = IUU_SET_LED;
 363         if (xmas == 1) {
 364                 get_random_bytes(buf_ptr, 6);
 365                 *(buf_ptr+7) = 1;
 366         } else {
 367                 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
 368         }
 369
 370         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 371                           usb_sndbulkpipe(port->serial->dev,
 372                                           port->bulk_out_endpointAddress),
 373                           port->write_urb->transfer_buffer, 8 ,
 374                           iuu_rxcmd, port);
 375         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 376 }
 377
 378 static void iuu_led_activity_off(struct urb *urb)
 379 {
 380         struct usb_serial_port *port = urb->context;
 381         int result;
 382         char *buf_ptr = port->write_urb->transfer_buffer;
 383         if (xmas == 1) {
 384                 iuu_rxcmd(urb);
 385                 return;
 386         } else {
 387                 *buf_ptr++ = IUU_SET_LED;
 388                 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
 389         }
 390         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 391                           usb_sndbulkpipe(port->serial->dev,
 392                                           port->bulk_out_endpointAddress),
 393                           port->write_urb->transfer_buffer, 8 ,
 394                           iuu_rxcmd, port);
 395         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 396 }
 397
 398
 399
 400 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
 401 {
 402         int status;
 403         struct iuu_private *priv = usb_get_serial_port_data(port);
 404         int Count = 0;
 405         u8 FrqGenAdr = 0x69;
 406         u8 DIV = 0;             /* 8bit */
 407         u8 XDRV = 0;            /* 8bit */
 408         u8 PUMP = 0;            /* 3bit */
 409         u8 PBmsb = 0;           /* 2bit */
 410         u8 PBlsb = 0;           /* 8bit */
 411         u8 PO = 0;              /* 1bit */
 412         u8 Q = 0;               /* 7bit */
 413         /* 24bit = 3bytes */
 414         unsigned int P = 0;
 415         unsigned int P2 = 0;
 416         int frq = (int)dwFrq;
 417
 418         if (frq == 0) {
 419                 priv->buf[Count++] = IUU_UART_WRITE_I2C;
 420                 priv->buf[Count++] = FrqGenAdr << 1;
 421                 priv->buf[Count++] = 0x09;
 422                 priv->buf[Count++] = 0x00;
 423
 424                 status = bulk_immediate(port, (u8 *) priv->buf, Count);
 425                 if (status != 0) {
 426                         dev_dbg(&port->dev, "%s - write error\n", __func__);
 427                         return status;
 428                 }
 429         } else if (frq == 3579000) {
 430                 DIV = 100;
 431                 P = 1193;
 432                 Q = 40;
 433                 XDRV = 0;
 434         } else if (frq == 3680000) {
 435                 DIV = 105;
 436                 P = 161;
 437                 Q = 5;
 438                 XDRV = 0;
 439         } else if (frq == 6000000) {
 440                 DIV = 66;
 441                 P = 66;
 442                 Q = 2;
 443                 XDRV = 0x28;
 444         } else {
 445                 unsigned int result = 0;
 446                 unsigned int tmp = 0;
 447                 unsigned int check;
 448                 unsigned int check2;
 449                 char found = 0x00;
 450                 unsigned int lQ = 2;
 451                 unsigned int lP = 2055;
 452                 unsigned int lDiv = 4;
 453
 454                 for (lQ = 2; lQ <= 47 && !found; lQ++)
 455                         for (lP = 2055; lP >= 8 && !found; lP--)
 456                                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
 457                                         tmp = (12000000 / lDiv) * (lP / lQ);
 458                                         if (abs((int)(tmp - frq)) <
 459                                             abs((int)(frq - result))) {
 460                                                 check2 = (12000000 / lQ);
 461                                                 if (check2 < 250000)
 462                                                         continue;
 463                                                 check = (12000000 / lQ) * lP;
 464                                                 if (check > 400000000)
 465                                                         continue;
 466                                                 if (check < 100000000)
 467                                                         continue;
 468                                                 if (lDiv < 4 || lDiv > 127)
 469                                                         continue;
 470                                                 result = tmp;
 471                                                 P = lP;
 472                                                 DIV = lDiv;
 473                                                 Q = lQ;
 474                                                 if (result == frq)
 475                                                         found = 0x01;
 476                                         }
 477                                 }
 478         }
 479         P2 = ((P - PO) / 2) - 4;
 480         DIV = DIV;
 481         PUMP = 0x04;
 482         PBmsb = (P2 >> 8 & 0x03);
 483         PBlsb = P2 & 0xFF;
 484         PO = (P >> 10) & 0x01;
 485         Q = Q - 2;
 486
 487         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 488         priv->buf[Count++] = FrqGenAdr << 1;
 489         priv->buf[Count++] = 0x09;
 490         priv->buf[Count++] = 0x20;      /* Adr = 0x09 */
 491         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 492         priv->buf[Count++] = FrqGenAdr << 1;
 493         priv->buf[Count++] = 0x0C;
 494         priv->buf[Count++] = DIV;       /* Adr = 0x0C */
 495         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 496         priv->buf[Count++] = FrqGenAdr << 1;
 497         priv->buf[Count++] = 0x12;
 498         priv->buf[Count++] = XDRV;      /* Adr = 0x12 */
 499         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 500         priv->buf[Count++] = FrqGenAdr << 1;
 501         priv->buf[Count++] = 0x13;
 502         priv->buf[Count++] = 0x6B;      /* Adr = 0x13 */
 503         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 504         priv->buf[Count++] = FrqGenAdr << 1;
 505         priv->buf[Count++] = 0x40;
 506         priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
 507                              (PBmsb & 0x03);    /* Adr = 0x40 */
 508         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 509         priv->buf[Count++] = FrqGenAdr << 1;
 510         priv->buf[Count++] = 0x41;
 511         priv->buf[Count++] = PBlsb;     /* Adr = 0x41 */
 512         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 513         priv->buf[Count++] = FrqGenAdr << 1;
 514         priv->buf[Count++] = 0x42;
 515         priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
 516         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 517         priv->buf[Count++] = FrqGenAdr << 1;
 518         priv->buf[Count++] = 0x44;
 519         priv->buf[Count++] = (char)0xFF;        /* Adr = 0x44 */
 520         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 521         priv->buf[Count++] = FrqGenAdr << 1;
 522         priv->buf[Count++] = 0x45;
 523         priv->buf[Count++] = (char)0xFE;        /* Adr = 0x45 */
 524         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 525         priv->buf[Count++] = FrqGenAdr << 1;
 526         priv->buf[Count++] = 0x46;
 527         priv->buf[Count++] = 0x7F;      /* Adr = 0x46 */
 528         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 529         priv->buf[Count++] = FrqGenAdr << 1;
 530         priv->buf[Count++] = 0x47;
 531         priv->buf[Count++] = (char)0x84;        /* Adr = 0x47 */
 532
 533         status = bulk_immediate(port, (u8 *) priv->buf, Count);
 534         if (status != IUU_OPERATION_OK)
 535                 dev_dbg(&port->dev, "%s - write error\n", __func__);
 536         return status;
 537 }
 538
 539 static int iuu_uart_flush(struct usb_serial_port *port)
 540 {
 541         struct device *dev = &port->dev;
 542         int i;
 543         int status;
 544         u8 rxcmd = IUU_UART_RX;
 545         struct iuu_private *priv = usb_get_serial_port_data(port);
 546
 547         if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
 548                 return -EIO;
 549
 550         for (i = 0; i < 2; i++) {
 551                 status = bulk_immediate(port, &rxcmd, 1);
 552                 if (status != IUU_OPERATION_OK) {
 553                         dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
 554                         return status;
 555                 }
 556
 557                 status = read_immediate(port, &priv->len, 1);
 558                 if (status != IUU_OPERATION_OK) {
 559                         dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 560                         return status;
 561                 }
 562
 563                 if (priv->len > 0) {
 564                         dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
 565                         status = read_immediate(port, priv->buf, priv->len);
 566                         if (status != IUU_OPERATION_OK) {
 567                                 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 568                                 return status;
 569                         }
 570                 }
 571         }
 572         dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
 573         iuu_led(port, 0, 0xF000, 0, 0xFF);
 574         return status;
 575 }
 576
 577 static void read_buf_callback(struct urb *urb)
 578 {
 579         struct usb_serial_port *port = urb->context;
 580         unsigned char *data = urb->transfer_buffer;
 581         int status = urb->status;
 582
 583         if (status) {
 584                 if (status == -EPROTO) {
 585                         /* reschedule needed */
 586                 }
 587                 return;
 588         }
 589
 590         dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
 591         if (data == NULL)
 592                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 593         if (urb->actual_length && data) {
 594                 tty_insert_flip_string(&port->port, data, urb->actual_length);
 595                 tty_flip_buffer_push(&port->port);
 596         }
 597         iuu_led_activity_on(urb);
 598 }
 599
 600 static int iuu_bulk_write(struct usb_serial_port *port)
 601 {
 602         struct iuu_private *priv = usb_get_serial_port_data(port);
 603         unsigned long flags;
 604         int result;
 605         int buf_len;
 606         char *buf_ptr = port->write_urb->transfer_buffer;
 607
 608         spin_lock_irqsave(&priv->lock, flags);
 609         *buf_ptr++ = IUU_UART_ESC;
 610         *buf_ptr++ = IUU_UART_TX;
 611         *buf_ptr++ = priv->writelen;
 612
 613         memcpy(buf_ptr, priv->writebuf, priv->writelen);
 614         buf_len = priv->writelen;
 615         priv->writelen = 0;
 616         spin_unlock_irqrestore(&priv->lock, flags);
 617         dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
 618                 buf_len, buf_len, buf_ptr);
 619         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 620                           usb_sndbulkpipe(port->serial->dev,
 621                                           port->bulk_out_endpointAddress),
 622                           port->write_urb->transfer_buffer, buf_len + 3,
 623                           iuu_rxcmd, port);
 624         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 625         usb_serial_port_softint(port);
 626         return result;
 627 }
 628
 629 static int iuu_read_buf(struct usb_serial_port *port, int len)
 630 {
 631         int result;
 632
 633         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 634                           usb_rcvbulkpipe(port->serial->dev,
 635                                           port->bulk_in_endpointAddress),
 636                           port->read_urb->transfer_buffer, len,
 637                           read_buf_callback, port);
 638         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 639         return result;
 640 }
 641
 642 static void iuu_uart_read_callback(struct urb *urb)
 643 {
 644         struct usb_serial_port *port = urb->context;
 645         struct iuu_private *priv = usb_get_serial_port_data(port);
 646         unsigned long flags;
 647         int status = urb->status;
 648         int error = 0;
 649         int len = 0;
 650         unsigned char *data = urb->transfer_buffer;
 651         priv->poll++;
 652
 653         if (status) {
 654                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 655                 /* error stop all */
 656                 return;
 657         }
 658         if (data == NULL)
 659                 dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
 660
 661         if (urb->actual_length == 1  && data != NULL)
 662                 len = (int) data[0];
 663
 664         if (urb->actual_length > 1) {
 665                 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
 666                     urb->actual_length);
 667                 error = 1;
 668                 return;
 669         }
 670         /* if len > 0 call readbuf */
 671
 672         if (len > 0 && error == 0) {
 673                 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
 674                         __func__, len);
 675                 status = iuu_read_buf(port, len);
 676                 return;
 677         }
 678         /* need to update status  ? */
 679         if (priv->poll > 99) {
 680                 status = iuu_status(port);
 681                 priv->poll = 0;
 682                 return;
 683         }
 684
 685         /* reset waiting ? */
 686
 687         if (priv->reset == 1) {
 688                 status = iuu_reset(port, 0xC);
 689                 return;
 690         }
 691         /* Writebuf is waiting */
 692         spin_lock_irqsave(&priv->lock, flags);
 693         if (priv->writelen > 0) {
 694                 spin_unlock_irqrestore(&priv->lock, flags);
 695                 status = iuu_bulk_write(port);
 696                 return;
 697         }
 698         spin_unlock_irqrestore(&priv->lock, flags);
 699         /* if nothing to write call again rxcmd */
 700         dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
 701         iuu_led_activity_off(urb);
 702 }
 703
 704 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
 705                           const u8 *buf, int count)
 706 {
 707         struct iuu_private *priv = usb_get_serial_port_data(port);
 708         unsigned long flags;
 709
 710         if (count > 256)
 711                 return -ENOMEM;
 712
 713         spin_lock_irqsave(&priv->lock, flags);
 714
 715         /* fill the buffer */
 716         memcpy(priv->writebuf + priv->writelen, buf, count);
 717         priv->writelen += count;
 718         spin_unlock_irqrestore(&priv->lock, flags);
 719
 720         return count;
 721 }
 722
 723 static void read_rxcmd_callback(struct urb *urb)
 724 {
 725         struct usb_serial_port *port = urb->context;
 726         int result;
 727         int status = urb->status;
 728
 729         if (status) {
 730                 /* error stop all */
 731                 return;
 732         }
 733
 734         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 735                           usb_rcvbulkpipe(port->serial->dev,
 736                                           port->bulk_in_endpointAddress),
 737                           port->read_urb->transfer_buffer, 256,
 738                           iuu_uart_read_callback, port);
 739         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 740         dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
 741 }
 742
 743 static int iuu_uart_on(struct usb_serial_port *port)
 744 {
 745         int status;
 746         u8 *buf;
 747
 748         buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
 749
 750         if (!buf)
 751                 return -ENOMEM;
 752
 753         buf[0] = IUU_UART_ENABLE;
 754         buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
 755         buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
 756         buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
 757
 758         status = bulk_immediate(port, buf, 4);
 759         if (status != IUU_OPERATION_OK) {
 760                 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
 761                 goto uart_enable_failed;
 762         }
 763         /*  iuu_reset() the card after iuu_uart_on() */
 764         status = iuu_uart_flush(port);
 765         if (status != IUU_OPERATION_OK)
 766                 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
 767 uart_enable_failed:
 768         kfree(buf);
 769         return status;
 770 }
 771
 772 /*  Disables the IUU UART (a.k.a. the Phoenix voiderface) */
 773 static int iuu_uart_off(struct usb_serial_port *port)
 774 {
 775         int status;
 776         u8 *buf;
 777         buf = kmalloc(1, GFP_KERNEL);
 778         if (!buf)
 779                 return -ENOMEM;
 780         buf[0] = IUU_UART_DISABLE;
 781
 782         status = bulk_immediate(port, buf, 1);
 783         if (status != IUU_OPERATION_OK)
 784                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 785
 786         kfree(buf);
 787         return status;
 788 }
 789
 790 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 791                          u32 *actual, u8 parity)
 792 {
 793         int status;
 794         u32 baud;
 795         u8 *dataout;
 796         u8 DataCount = 0;
 797         u8 T1Frekvens = 0;
 798         u8 T1reload = 0;
 799         unsigned int T1FrekvensHZ = 0;
 800
 801         dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
 802         dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
 803
 804         if (!dataout)
 805                 return -ENOMEM;
 806         /*baud = (((priv->clk / 35) * baud_base) / 100000); */
 807         baud = baud_base;
 808
 809         if (baud < 1200 || baud > 230400) {
 810                 kfree(dataout);
 811                 return IUU_INVALID_PARAMETER;
 812         }
 813         if (baud > 977) {
 814                 T1Frekvens = 3;
 815                 T1FrekvensHZ = 500000;
 816         }
 817
 818         if (baud > 3906) {
 819                 T1Frekvens = 2;
 820                 T1FrekvensHZ = 2000000;
 821         }
 822
 823         if (baud > 11718) {
 824                 T1Frekvens = 1;
 825                 T1FrekvensHZ = 6000000;
 826         }
 827
 828         if (baud > 46875) {
 829                 T1Frekvens = 0;
 830                 T1FrekvensHZ = 24000000;
 831         }
 832
 833         T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
 834
 835         /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
 836         dataout[DataCount++] = IUU_UART_ESC;
 837         /*  magic number here:  CHANGE_BAUD; */
 838         dataout[DataCount++] = IUU_UART_CHANGE;
 839         dataout[DataCount++] = T1Frekvens;
 840         dataout[DataCount++] = T1reload;
 841
 842         *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
 843
 844         switch (parity & 0x0F) {
 845         case IUU_PARITY_NONE:
 846                 dataout[DataCount++] = 0x00;
 847                 break;
 848         case IUU_PARITY_EVEN:
 849                 dataout[DataCount++] = 0x01;
 850                 break;
 851         case IUU_PARITY_ODD:
 852                 dataout[DataCount++] = 0x02;
 853                 break;
 854         case IUU_PARITY_MARK:
 855                 dataout[DataCount++] = 0x03;
 856                 break;
 857         case IUU_PARITY_SPACE:
 858                 dataout[DataCount++] = 0x04;
 859                 break;
 860         default:
 861                 kfree(dataout);
 862                 return IUU_INVALID_PARAMETER;
 863                 break;
 864         }
 865
 866         switch (parity & 0xF0) {
 867         case IUU_ONE_STOP_BIT:
 868                 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
 869                 break;
 870
 871         case IUU_TWO_STOP_BITS:
 872                 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 873                 break;
 874         default:
 875                 kfree(dataout);
 876                 return IUU_INVALID_PARAMETER;
 877                 break;
 878         }
 879
 880         status = bulk_immediate(port, dataout, DataCount);
 881         if (status != IUU_OPERATION_OK)
 882                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 883         kfree(dataout);
 884         return status;
 885 }
 886
 887 static void iuu_set_termios(struct tty_struct *tty,
 888                 struct usb_serial_port *port, struct ktermios *old_termios)
 889 {
 890         const u32 supported_mask = CMSPAR|PARENB|PARODD;
 891         struct iuu_private *priv = usb_get_serial_port_data(port);
 892         unsigned int cflag = tty->termios.c_cflag;
 893         int status;
 894         u32 actual;
 895         u32 parity;
 896         int csize = CS7;
 897         int baud;
 898         u32 newval = cflag & supported_mask;
 899
 900         /* Just use the ospeed. ispeed should be the same. */
 901         baud = tty->termios.c_ospeed;
 902
 903         dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
 904
 905         /* compute the parity parameter */
 906         parity = 0;
 907         if (cflag & CMSPAR) {   /* Using mark space */
 908                 if (cflag & PARODD)
 909                         parity |= IUU_PARITY_SPACE;
 910                 else
 911                         parity |= IUU_PARITY_MARK;
 912         } else if (!(cflag & PARENB)) {
 913                 parity |= IUU_PARITY_NONE;
 914                 csize = CS8;
 915         } else if (cflag & PARODD)
 916                 parity |= IUU_PARITY_ODD;
 917         else
 918                 parity |= IUU_PARITY_EVEN;
 919
 920         parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
 921
 922         /* set it */
 923         status = iuu_uart_baud(port,
 924                         baud * priv->boost / 100,
 925                         &actual, parity);
 926
 927         /* set the termios value to the real one, so the user now what has
 928          * changed. We support few fields so its easies to copy the old hw
 929          * settings back over and then adjust them
 930          */
 931         if (old_termios)
 932                 tty_termios_copy_hw(&tty->termios, old_termios);
 933         if (status != 0)        /* Set failed - return old bits */
 934                 return;
 935         /* Re-encode speed, parity and csize */
 936         tty_encode_baud_rate(tty, baud, baud);
 937         tty->termios.c_cflag &= ~(supported_mask|CSIZE);
 938         tty->termios.c_cflag |= newval | csize;
 939 }
 940
 941 static void iuu_close(struct usb_serial_port *port)
 942 {
 943         /* iuu_led (port,255,0,0,0); */
 944
 945         iuu_uart_off(port);
 946
 947         usb_kill_urb(port->write_urb);
 948         usb_kill_urb(port->read_urb);
 949
 950         iuu_led(port, 0, 0, 0xF000, 0xFF);
 951 }
 952
 953 static void iuu_init_termios(struct tty_struct *tty)
 954 {
 955         tty->termios = tty_std_termios;
 956         tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
 957                                 | TIOCM_CTS | CSTOPB | PARENB;
 958         tty->termios.c_ispeed = 9600;
 959         tty->termios.c_ospeed = 9600;
 960         tty->termios.c_lflag = 0;
 961         tty->termios.c_oflag = 0;
 962         tty->termios.c_iflag = 0;
 963 }
 964
 965 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 966 {
 967         struct usb_serial *serial = port->serial;
 968         struct device *dev = &port->dev;
 969         u8 *buf;
 970         int result;
 971         int baud;
 972         u32 actual;
 973         struct iuu_private *priv = usb_get_serial_port_data(port);
 974
 975         baud = tty->termios.c_ospeed;
 976         tty->termios.c_ispeed = baud;
 977         /* Re-encode speed */
 978         tty_encode_baud_rate(tty, baud, baud);
 979
 980         dev_dbg(dev, "%s - baud %d\n", __func__, baud);
 981         usb_clear_halt(serial->dev, port->write_urb->pipe);
 982         usb_clear_halt(serial->dev, port->read_urb->pipe);
 983
 984         buf = kmalloc(10, GFP_KERNEL);
 985         if (buf == NULL)
 986                 return -ENOMEM;
 987
 988         priv->poll = 0;
 989
 990         /* initialize writebuf */
 991 #define FISH(a, b, c, d) do { \
 992         result = usb_control_msg(port->serial->dev,     \
 993                                 usb_rcvctrlpipe(port->serial->dev, 0),  \
 994                                 b, a, c, d, buf, 1, 1000); \
 995         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n", a, b, c, d, result, \
 996                                 buf[0]); } while (0);
 997
 998 #define SOUP(a, b, c, d)  do { \
 999         result = usb_control_msg(port->serial->dev,     \
1000                                 usb_sndctrlpipe(port->serial->dev, 0),  \
1001                                 b, a, c, d, NULL, 0, 1000); \
1002         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d\n", a, b, c, d, result); } while (0)
1003
1004         /*  This is not UART related but IUU USB driver related or something */
1005         /*  like that. Basically no IUU will accept any commands from the USB */
1006         /*  host unless it has received the following message */
1007         /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1008
1009         SOUP(0x03, 0x02, 0x02, 0x0);
1010         kfree(buf);
1011         iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1012         iuu_uart_on(port);
1013         if (boost < 100)
1014                 boost = 100;
1015         priv->boost = boost;
1016         priv->baud = baud;
1017         switch (clockmode) {
1018         case 2:         /*  3.680 Mhz */
1019                 priv->clk = IUU_CLK_3680000;
1020                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1021                 result =
1022                     iuu_uart_baud(port, baud * boost / 100, &actual,
1023                                   IUU_PARITY_EVEN);
1024                 break;
1025         case 3:         /*  6.00 Mhz */
1026                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1027                 priv->clk = IUU_CLK_6000000;
1028                 /* Ratio of 6000000 to 3500000 for baud 9600 */
1029                 result =
1030                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
1031                                   IUU_PARITY_EVEN);
1032                 break;
1033         default:                /*  3.579 Mhz */
1034                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1035                 priv->clk = IUU_CLK_3579000;
1036                 result =
1037                     iuu_uart_baud(port, baud * boost / 100, &actual,
1038                                   IUU_PARITY_EVEN);
1039         }
1040
1041         /* set the cardin cardout signals */
1042         switch (cdmode) {
1043         case 0:
1044                 iuu_cardin = 0;
1045                 iuu_cardout = 0;
1046                 break;
1047         case 1:
1048                 iuu_cardin = TIOCM_CD;
1049                 iuu_cardout =  0;
1050                 break;
1051         case 2:
1052                 iuu_cardin = 0;
1053                 iuu_cardout = TIOCM_CD;
1054                 break;
1055         case 3:
1056                 iuu_cardin = TIOCM_DSR;
1057                 iuu_cardout = 0;
1058                 break;
1059         case 4:
1060                 iuu_cardin = 0;
1061                 iuu_cardout = TIOCM_DSR;
1062                 break;
1063         case 5:
1064                 iuu_cardin = TIOCM_CTS;
1065                 iuu_cardout = 0;
1066                 break;
1067         case 6:
1068                 iuu_cardin = 0;
1069                 iuu_cardout = TIOCM_CTS;
1070                 break;
1071         case 7:
1072                 iuu_cardin = TIOCM_RNG;
1073                 iuu_cardout = 0;
1074                 break;
1075         case 8:
1076                 iuu_cardin = 0;
1077                 iuu_cardout = TIOCM_RNG;
1078         }
1079
1080         iuu_uart_flush(port);
1081
1082         dev_dbg(dev, "%s - initialization done\n", __func__);
1083
1084         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1085         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1086                           usb_sndbulkpipe(port->serial->dev,
1087                                           port->bulk_out_endpointAddress),
1088                           port->write_urb->transfer_buffer, 1,
1089                           read_rxcmd_callback, port);
1090         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1091         if (result) {
1092                 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1093                 iuu_close(port);
1094         } else {
1095                 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1096         }
1097
1098         return result;
1099 }
1100
1101 /* how to change VCC */
1102 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1103 {
1104         int status;
1105         u8 *buf;
1106
1107         buf = kmalloc(5, GFP_KERNEL);
1108         if (!buf)
1109                 return -ENOMEM;
1110
1111         buf[0] = IUU_SET_VCC;
1112         buf[1] = vcc & 0xFF;
1113         buf[2] = (vcc >> 8) & 0xFF;
1114         buf[3] = (vcc >> 16) & 0xFF;
1115         buf[4] = (vcc >> 24) & 0xFF;
1116
1117         status = bulk_immediate(port, buf, 5);
1118         kfree(buf);
1119
1120         if (status != IUU_OPERATION_OK)
1121                 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1122         else
1123                 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1124
1125         return status;
1126 }
1127
1128 /*
1129  * Sysfs Attributes
1130  */
1131
1132 static ssize_t vcc_mode_show(struct device *dev,
1133         struct device_attribute *attr, char *buf)
1134 {
1135         struct usb_serial_port *port = to_usb_serial_port(dev);
1136         struct iuu_private *priv = usb_get_serial_port_data(port);
1137
1138         return sprintf(buf, "%d\n", priv->vcc);
1139 }
1140
1141 static ssize_t vcc_mode_store(struct device *dev,
1142         struct device_attribute *attr, const char *buf, size_t count)
1143 {
1144         struct usb_serial_port *port = to_usb_serial_port(dev);
1145         struct iuu_private *priv = usb_get_serial_port_data(port);
1146         unsigned long v;
1147
1148         if (kstrtoul(buf, 10, &v)) {
1149                 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1150                                 __func__, buf);
1151                 goto fail_store_vcc_mode;
1152         }
1153
1154         dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1155
1156         if ((v != 3) && (v != 5)) {
1157                 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1158         } else {
1159                 iuu_vcc_set(port, v);
1160                 priv->vcc = v;
1161         }
1162 fail_store_vcc_mode:
1163         return count;
1164 }
1165 static DEVICE_ATTR_RW(vcc_mode);
1166
1167 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1168 {
1169         return device_create_file(&port->dev, &dev_attr_vcc_mode);
1170 }
1171
1172 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1173 {
1174         device_remove_file(&port->dev, &dev_attr_vcc_mode);
1175         return 0;
1176 }
1177
1178 /*
1179  * End Sysfs Attributes
1180  */
1181
1182 static struct usb_serial_driver iuu_device = {
1183         .driver = {
1184                    .owner = THIS_MODULE,
1185                    .name = "iuu_phoenix",
1186                    },
1187         .id_table = id_table,
1188         .num_ports = 1,
1189         .bulk_in_size = 512,
1190         .bulk_out_size = 512,
1191         .open = iuu_open,
1192         .close = iuu_close,
1193         .write = iuu_uart_write,
1194         .read_bulk_callback = iuu_uart_read_callback,
1195         .tiocmget = iuu_tiocmget,
1196         .tiocmset = iuu_tiocmset,
1197         .set_termios = iuu_set_termios,
1198         .init_termios = iuu_init_termios,
1199         .port_probe = iuu_port_probe,
1200         .port_remove = iuu_port_remove,
1201 };
1202
1203 static struct usb_serial_driver * const serial_drivers[] = {
1204         &iuu_device, NULL
1205 };
1206
1207 module_usb_serial_driver(serial_drivers, id_table);
1208
1209 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1210
1211 MODULE_DESCRIPTION(DRIVER_DESC);
1212 MODULE_LICENSE("GPL");
1213
1214 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1215 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1216
1217 module_param(boost, int, S_IRUGO | S_IWUSR);
1218 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1219
1220 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1221 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1222                 "3=6 Mhz)");
1223
1224 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1225 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1226                  "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1227
1228 module_param(vcc_default, int, S_IRUGO | S_IWUSR);
1229 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1230                 "for 5V). Default to 5.");