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
 363         if (xmas) {
 364                 buf_ptr[0] = IUU_SET_LED;
 365                 get_random_bytes(buf_ptr + 1, 6);
 366                 buf_ptr[7] = 1;
 367         } else {
 368                 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
 369         }
 370
 371         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 372                           usb_sndbulkpipe(port->serial->dev,
 373                                           port->bulk_out_endpointAddress),
 374                           port->write_urb->transfer_buffer, 8 ,
 375                           iuu_rxcmd, port);
 376         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 377 }
 378
 379 static void iuu_led_activity_off(struct urb *urb)
 380 {
 381         struct usb_serial_port *port = urb->context;
 382         int result;
 383         char *buf_ptr = port->write_urb->transfer_buffer;
 384
 385         if (xmas) {
 386                 iuu_rxcmd(urb);
 387                 return;
 388         }
 389
 390         iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
 391
 392         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 393                           usb_sndbulkpipe(port->serial->dev,
 394                                           port->bulk_out_endpointAddress),
 395                           port->write_urb->transfer_buffer, 8 ,
 396                           iuu_rxcmd, port);
 397         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 398 }
 399
 400
 401
 402 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
 403 {
 404         int status;
 405         struct iuu_private *priv = usb_get_serial_port_data(port);
 406         int Count = 0;
 407         u8 FrqGenAdr = 0x69;
 408         u8 DIV = 0;             /* 8bit */
 409         u8 XDRV = 0;            /* 8bit */
 410         u8 PUMP = 0;            /* 3bit */
 411         u8 PBmsb = 0;           /* 2bit */
 412         u8 PBlsb = 0;           /* 8bit */
 413         u8 PO = 0;              /* 1bit */
 414         u8 Q = 0;               /* 7bit */
 415         /* 24bit = 3bytes */
 416         unsigned int P = 0;
 417         unsigned int P2 = 0;
 418         int frq = (int)dwFrq;
 419
 420         if (frq == 0) {
 421                 priv->buf[Count++] = IUU_UART_WRITE_I2C;
 422                 priv->buf[Count++] = FrqGenAdr << 1;
 423                 priv->buf[Count++] = 0x09;
 424                 priv->buf[Count++] = 0x00;
 425
 426                 status = bulk_immediate(port, (u8 *) priv->buf, Count);
 427                 if (status != 0) {
 428                         dev_dbg(&port->dev, "%s - write error\n", __func__);
 429                         return status;
 430                 }
 431         } else if (frq == 3579000) {
 432                 DIV = 100;
 433                 P = 1193;
 434                 Q = 40;
 435                 XDRV = 0;
 436         } else if (frq == 3680000) {
 437                 DIV = 105;
 438                 P = 161;
 439                 Q = 5;
 440                 XDRV = 0;
 441         } else if (frq == 6000000) {
 442                 DIV = 66;
 443                 P = 66;
 444                 Q = 2;
 445                 XDRV = 0x28;
 446         } else {
 447                 unsigned int result = 0;
 448                 unsigned int tmp = 0;
 449                 unsigned int check;
 450                 unsigned int check2;
 451                 char found = 0x00;
 452                 unsigned int lQ = 2;
 453                 unsigned int lP = 2055;
 454                 unsigned int lDiv = 4;
 455
 456                 for (lQ = 2; lQ <= 47 && !found; lQ++)
 457                         for (lP = 2055; lP >= 8 && !found; lP--)
 458                                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
 459                                         tmp = (12000000 / lDiv) * (lP / lQ);
 460                                         if (abs((int)(tmp - frq)) <
 461                                             abs((int)(frq - result))) {
 462                                                 check2 = (12000000 / lQ);
 463                                                 if (check2 < 250000)
 464                                                         continue;
 465                                                 check = (12000000 / lQ) * lP;
 466                                                 if (check > 400000000)
 467                                                         continue;
 468                                                 if (check < 100000000)
 469                                                         continue;
 470                                                 if (lDiv < 4 || lDiv > 127)
 471                                                         continue;
 472                                                 result = tmp;
 473                                                 P = lP;
 474                                                 DIV = lDiv;
 475                                                 Q = lQ;
 476                                                 if (result == frq)
 477                                                         found = 0x01;
 478                                         }
 479                                 }
 480         }
 481         P2 = ((P - PO) / 2) - 4;
 482         DIV = DIV;
 483         PUMP = 0x04;
 484         PBmsb = (P2 >> 8 & 0x03);
 485         PBlsb = P2 & 0xFF;
 486         PO = (P >> 10) & 0x01;
 487         Q = Q - 2;
 488
 489         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 490         priv->buf[Count++] = FrqGenAdr << 1;
 491         priv->buf[Count++] = 0x09;
 492         priv->buf[Count++] = 0x20;      /* Adr = 0x09 */
 493         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 494         priv->buf[Count++] = FrqGenAdr << 1;
 495         priv->buf[Count++] = 0x0C;
 496         priv->buf[Count++] = DIV;       /* Adr = 0x0C */
 497         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 498         priv->buf[Count++] = FrqGenAdr << 1;
 499         priv->buf[Count++] = 0x12;
 500         priv->buf[Count++] = XDRV;      /* Adr = 0x12 */
 501         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 502         priv->buf[Count++] = FrqGenAdr << 1;
 503         priv->buf[Count++] = 0x13;
 504         priv->buf[Count++] = 0x6B;      /* Adr = 0x13 */
 505         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 506         priv->buf[Count++] = FrqGenAdr << 1;
 507         priv->buf[Count++] = 0x40;
 508         priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
 509                              (PBmsb & 0x03);    /* Adr = 0x40 */
 510         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 511         priv->buf[Count++] = FrqGenAdr << 1;
 512         priv->buf[Count++] = 0x41;
 513         priv->buf[Count++] = PBlsb;     /* Adr = 0x41 */
 514         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 515         priv->buf[Count++] = FrqGenAdr << 1;
 516         priv->buf[Count++] = 0x42;
 517         priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
 518         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 519         priv->buf[Count++] = FrqGenAdr << 1;
 520         priv->buf[Count++] = 0x44;
 521         priv->buf[Count++] = (char)0xFF;        /* Adr = 0x44 */
 522         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 523         priv->buf[Count++] = FrqGenAdr << 1;
 524         priv->buf[Count++] = 0x45;
 525         priv->buf[Count++] = (char)0xFE;        /* Adr = 0x45 */
 526         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 527         priv->buf[Count++] = FrqGenAdr << 1;
 528         priv->buf[Count++] = 0x46;
 529         priv->buf[Count++] = 0x7F;      /* Adr = 0x46 */
 530         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 531         priv->buf[Count++] = FrqGenAdr << 1;
 532         priv->buf[Count++] = 0x47;
 533         priv->buf[Count++] = (char)0x84;        /* Adr = 0x47 */
 534
 535         status = bulk_immediate(port, (u8 *) priv->buf, Count);
 536         if (status != IUU_OPERATION_OK)
 537                 dev_dbg(&port->dev, "%s - write error\n", __func__);
 538         return status;
 539 }
 540
 541 static int iuu_uart_flush(struct usb_serial_port *port)
 542 {
 543         struct device *dev = &port->dev;
 544         int i;
 545         int status;
 546         u8 *rxcmd;
 547         struct iuu_private *priv = usb_get_serial_port_data(port);
 548
 549         if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
 550                 return -EIO;
 551
 552         rxcmd = kmalloc(1, GFP_KERNEL);
 553         if (!rxcmd)
 554                 return -ENOMEM;
 555
 556         rxcmd[0] = IUU_UART_RX;
 557
 558         for (i = 0; i < 2; i++) {
 559                 status = bulk_immediate(port, rxcmd, 1);
 560                 if (status != IUU_OPERATION_OK) {
 561                         dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
 562                         goto out_free;
 563                 }
 564
 565                 status = read_immediate(port, &priv->len, 1);
 566                 if (status != IUU_OPERATION_OK) {
 567                         dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 568                         goto out_free;
 569                 }
 570
 571                 if (priv->len > 0) {
 572                         dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
 573                         status = read_immediate(port, priv->buf, priv->len);
 574                         if (status != IUU_OPERATION_OK) {
 575                                 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 576                                 goto out_free;
 577                         }
 578                 }
 579         }
 580         dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
 581         iuu_led(port, 0, 0xF000, 0, 0xFF);
 582
 583 out_free:
 584         kfree(rxcmd);
 585
 586         return status;
 587 }
 588
 589 static void read_buf_callback(struct urb *urb)
 590 {
 591         struct usb_serial_port *port = urb->context;
 592         unsigned char *data = urb->transfer_buffer;
 593         int status = urb->status;
 594
 595         if (status) {
 596                 if (status == -EPROTO) {
 597                         /* reschedule needed */
 598                 }
 599                 return;
 600         }
 601
 602         dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
 603
 604         if (urb->actual_length) {
 605                 tty_insert_flip_string(&port->port, data, urb->actual_length);
 606                 tty_flip_buffer_push(&port->port);
 607         }
 608         iuu_led_activity_on(urb);
 609 }
 610
 611 static int iuu_bulk_write(struct usb_serial_port *port)
 612 {
 613         struct iuu_private *priv = usb_get_serial_port_data(port);
 614         unsigned long flags;
 615         int result;
 616         int buf_len;
 617         char *buf_ptr = port->write_urb->transfer_buffer;
 618
 619         spin_lock_irqsave(&priv->lock, flags);
 620         *buf_ptr++ = IUU_UART_ESC;
 621         *buf_ptr++ = IUU_UART_TX;
 622         *buf_ptr++ = priv->writelen;
 623
 624         memcpy(buf_ptr, priv->writebuf, priv->writelen);
 625         buf_len = priv->writelen;
 626         priv->writelen = 0;
 627         spin_unlock_irqrestore(&priv->lock, flags);
 628         dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
 629                 buf_len, buf_len, buf_ptr);
 630         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 631                           usb_sndbulkpipe(port->serial->dev,
 632                                           port->bulk_out_endpointAddress),
 633                           port->write_urb->transfer_buffer, buf_len + 3,
 634                           iuu_rxcmd, port);
 635         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 636         usb_serial_port_softint(port);
 637         return result;
 638 }
 639
 640 static int iuu_read_buf(struct usb_serial_port *port, int len)
 641 {
 642         int result;
 643
 644         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 645                           usb_rcvbulkpipe(port->serial->dev,
 646                                           port->bulk_in_endpointAddress),
 647                           port->read_urb->transfer_buffer, len,
 648                           read_buf_callback, port);
 649         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 650         return result;
 651 }
 652
 653 static void iuu_uart_read_callback(struct urb *urb)
 654 {
 655         struct usb_serial_port *port = urb->context;
 656         struct iuu_private *priv = usb_get_serial_port_data(port);
 657         unsigned long flags;
 658         int status = urb->status;
 659         int error = 0;
 660         int len = 0;
 661         unsigned char *data = urb->transfer_buffer;
 662         priv->poll++;
 663
 664         if (status) {
 665                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 666                 /* error stop all */
 667                 return;
 668         }
 669
 670         if (urb->actual_length == 1)
 671                 len = (int) data[0];
 672
 673         if (urb->actual_length > 1) {
 674                 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
 675                     urb->actual_length);
 676                 error = 1;
 677                 return;
 678         }
 679         /* if len > 0 call readbuf */
 680
 681         if (len > 0 && error == 0) {
 682                 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
 683                         __func__, len);
 684                 status = iuu_read_buf(port, len);
 685                 return;
 686         }
 687         /* need to update status  ? */
 688         if (priv->poll > 99) {
 689                 status = iuu_status(port);
 690                 priv->poll = 0;
 691                 return;
 692         }
 693
 694         /* reset waiting ? */
 695
 696         if (priv->reset == 1) {
 697                 status = iuu_reset(port, 0xC);
 698                 return;
 699         }
 700         /* Writebuf is waiting */
 701         spin_lock_irqsave(&priv->lock, flags);
 702         if (priv->writelen > 0) {
 703                 spin_unlock_irqrestore(&priv->lock, flags);
 704                 status = iuu_bulk_write(port);
 705                 return;
 706         }
 707         spin_unlock_irqrestore(&priv->lock, flags);
 708         /* if nothing to write call again rxcmd */
 709         dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
 710         iuu_led_activity_off(urb);
 711 }
 712
 713 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
 714                           const u8 *buf, int count)
 715 {
 716         struct iuu_private *priv = usb_get_serial_port_data(port);
 717         unsigned long flags;
 718
 719         spin_lock_irqsave(&priv->lock, flags);
 720
 721         count = min(count, 256 - priv->writelen);
 722         if (count == 0)
 723                 goto out;
 724
 725         /* fill the buffer */
 726         memcpy(priv->writebuf + priv->writelen, buf, count);
 727         priv->writelen += count;
 728 out:
 729         spin_unlock_irqrestore(&priv->lock, flags);
 730
 731         return count;
 732 }
 733
 734 static void read_rxcmd_callback(struct urb *urb)
 735 {
 736         struct usb_serial_port *port = urb->context;
 737         int result;
 738         int status = urb->status;
 739
 740         if (status) {
 741                 /* error stop all */
 742                 return;
 743         }
 744
 745         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 746                           usb_rcvbulkpipe(port->serial->dev,
 747                                           port->bulk_in_endpointAddress),
 748                           port->read_urb->transfer_buffer, 256,
 749                           iuu_uart_read_callback, port);
 750         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 751         dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
 752 }
 753
 754 static int iuu_uart_on(struct usb_serial_port *port)
 755 {
 756         int status;
 757         u8 *buf;
 758
 759         buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
 760
 761         if (!buf)
 762                 return -ENOMEM;
 763
 764         buf[0] = IUU_UART_ENABLE;
 765         buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
 766         buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
 767         buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
 768
 769         status = bulk_immediate(port, buf, 4);
 770         if (status != IUU_OPERATION_OK) {
 771                 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
 772                 goto uart_enable_failed;
 773         }
 774         /*  iuu_reset() the card after iuu_uart_on() */
 775         status = iuu_uart_flush(port);
 776         if (status != IUU_OPERATION_OK)
 777                 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
 778 uart_enable_failed:
 779         kfree(buf);
 780         return status;
 781 }
 782
 783 /*  Disables the IUU UART (a.k.a. the Phoenix voiderface) */
 784 static int iuu_uart_off(struct usb_serial_port *port)
 785 {
 786         int status;
 787         u8 *buf;
 788         buf = kmalloc(1, GFP_KERNEL);
 789         if (!buf)
 790                 return -ENOMEM;
 791         buf[0] = IUU_UART_DISABLE;
 792
 793         status = bulk_immediate(port, buf, 1);
 794         if (status != IUU_OPERATION_OK)
 795                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 796
 797         kfree(buf);
 798         return status;
 799 }
 800
 801 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 802                          u32 *actual, u8 parity)
 803 {
 804         int status;
 805         u32 baud;
 806         u8 *dataout;
 807         u8 DataCount = 0;
 808         u8 T1Frekvens = 0;
 809         u8 T1reload = 0;
 810         unsigned int T1FrekvensHZ = 0;
 811
 812         dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
 813         dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
 814
 815         if (!dataout)
 816                 return -ENOMEM;
 817         /*baud = (((priv->clk / 35) * baud_base) / 100000); */
 818         baud = baud_base;
 819
 820         if (baud < 1200 || baud > 230400) {
 821                 kfree(dataout);
 822                 return IUU_INVALID_PARAMETER;
 823         }
 824         if (baud > 977) {
 825                 T1Frekvens = 3;
 826                 T1FrekvensHZ = 500000;
 827         }
 828
 829         if (baud > 3906) {
 830                 T1Frekvens = 2;
 831                 T1FrekvensHZ = 2000000;
 832         }
 833
 834         if (baud > 11718) {
 835                 T1Frekvens = 1;
 836                 T1FrekvensHZ = 6000000;
 837         }
 838
 839         if (baud > 46875) {
 840                 T1Frekvens = 0;
 841                 T1FrekvensHZ = 24000000;
 842         }
 843
 844         T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
 845
 846         /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
 847         dataout[DataCount++] = IUU_UART_ESC;
 848         /*  magic number here:  CHANGE_BAUD; */
 849         dataout[DataCount++] = IUU_UART_CHANGE;
 850         dataout[DataCount++] = T1Frekvens;
 851         dataout[DataCount++] = T1reload;
 852
 853         *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
 854
 855         switch (parity & 0x0F) {
 856         case IUU_PARITY_NONE:
 857                 dataout[DataCount++] = 0x00;
 858                 break;
 859         case IUU_PARITY_EVEN:
 860                 dataout[DataCount++] = 0x01;
 861                 break;
 862         case IUU_PARITY_ODD:
 863                 dataout[DataCount++] = 0x02;
 864                 break;
 865         case IUU_PARITY_MARK:
 866                 dataout[DataCount++] = 0x03;
 867                 break;
 868         case IUU_PARITY_SPACE:
 869                 dataout[DataCount++] = 0x04;
 870                 break;
 871         default:
 872                 kfree(dataout);
 873                 return IUU_INVALID_PARAMETER;
 874                 break;
 875         }
 876
 877         switch (parity & 0xF0) {
 878         case IUU_ONE_STOP_BIT:
 879                 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
 880                 break;
 881
 882         case IUU_TWO_STOP_BITS:
 883                 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 884                 break;
 885         default:
 886                 kfree(dataout);
 887                 return IUU_INVALID_PARAMETER;
 888                 break;
 889         }
 890
 891         status = bulk_immediate(port, dataout, DataCount);
 892         if (status != IUU_OPERATION_OK)
 893                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 894         kfree(dataout);
 895         return status;
 896 }
 897
 898 static void iuu_set_termios(struct tty_struct *tty,
 899                 struct usb_serial_port *port, struct ktermios *old_termios)
 900 {
 901         const u32 supported_mask = CMSPAR|PARENB|PARODD;
 902         struct iuu_private *priv = usb_get_serial_port_data(port);
 903         unsigned int cflag = tty->termios.c_cflag;
 904         int status;
 905         u32 actual;
 906         u32 parity;
 907         int csize = CS7;
 908         int baud;
 909         u32 newval = cflag & supported_mask;
 910
 911         /* Just use the ospeed. ispeed should be the same. */
 912         baud = tty->termios.c_ospeed;
 913
 914         dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
 915
 916         /* compute the parity parameter */
 917         parity = 0;
 918         if (cflag & CMSPAR) {   /* Using mark space */
 919                 if (cflag & PARODD)
 920                         parity |= IUU_PARITY_SPACE;
 921                 else
 922                         parity |= IUU_PARITY_MARK;
 923         } else if (!(cflag & PARENB)) {
 924                 parity |= IUU_PARITY_NONE;
 925                 csize = CS8;
 926         } else if (cflag & PARODD)
 927                 parity |= IUU_PARITY_ODD;
 928         else
 929                 parity |= IUU_PARITY_EVEN;
 930
 931         parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
 932
 933         /* set it */
 934         status = iuu_uart_baud(port,
 935                         baud * priv->boost / 100,
 936                         &actual, parity);
 937
 938         /* set the termios value to the real one, so the user now what has
 939          * changed. We support few fields so its easies to copy the old hw
 940          * settings back over and then adjust them
 941          */
 942         if (old_termios)
 943                 tty_termios_copy_hw(&tty->termios, old_termios);
 944         if (status != 0)        /* Set failed - return old bits */
 945                 return;
 946         /* Re-encode speed, parity and csize */
 947         tty_encode_baud_rate(tty, baud, baud);
 948         tty->termios.c_cflag &= ~(supported_mask|CSIZE);
 949         tty->termios.c_cflag |= newval | csize;
 950 }
 951
 952 static void iuu_close(struct usb_serial_port *port)
 953 {
 954         /* iuu_led (port,255,0,0,0); */
 955
 956         iuu_uart_off(port);
 957
 958         usb_kill_urb(port->write_urb);
 959         usb_kill_urb(port->read_urb);
 960
 961         iuu_led(port, 0, 0, 0xF000, 0xFF);
 962 }
 963
 964 static void iuu_init_termios(struct tty_struct *tty)
 965 {
 966         tty->termios = tty_std_termios;
 967         tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
 968                                 | TIOCM_CTS | CSTOPB | PARENB;
 969         tty->termios.c_ispeed = 9600;
 970         tty->termios.c_ospeed = 9600;
 971         tty->termios.c_lflag = 0;
 972         tty->termios.c_oflag = 0;
 973         tty->termios.c_iflag = 0;
 974 }
 975
 976 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 977 {
 978         struct usb_serial *serial = port->serial;
 979         struct device *dev = &port->dev;
 980         int result;
 981         int baud;
 982         u32 actual;
 983         struct iuu_private *priv = usb_get_serial_port_data(port);
 984
 985         baud = tty->termios.c_ospeed;
 986         tty->termios.c_ispeed = baud;
 987         /* Re-encode speed */
 988         tty_encode_baud_rate(tty, baud, baud);
 989
 990         dev_dbg(dev, "%s - baud %d\n", __func__, baud);
 991         usb_clear_halt(serial->dev, port->write_urb->pipe);
 992         usb_clear_halt(serial->dev, port->read_urb->pipe);
 993
 994         priv->poll = 0;
 995
 996 #define SOUP(a, b, c, d)  do { \
 997         result = usb_control_msg(port->serial->dev,     \
 998                                 usb_sndctrlpipe(port->serial->dev, 0),  \
 999                                 b, a, c, d, NULL, 0, 1000); \
1000         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d\n", a, b, c, d, result); } while (0)
1001
1002         /*  This is not UART related but IUU USB driver related or something */
1003         /*  like that. Basically no IUU will accept any commands from the USB */
1004         /*  host unless it has received the following message */
1005         /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1006
1007         SOUP(0x03, 0x02, 0x02, 0x0);
1008
1009         iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1010         iuu_uart_on(port);
1011         if (boost < 100)
1012                 boost = 100;
1013         priv->boost = boost;
1014         priv->baud = baud;
1015         switch (clockmode) {
1016         case 2:         /*  3.680 Mhz */
1017                 priv->clk = IUU_CLK_3680000;
1018                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1019                 result =
1020                     iuu_uart_baud(port, baud * boost / 100, &actual,
1021                                   IUU_PARITY_EVEN);
1022                 break;
1023         case 3:         /*  6.00 Mhz */
1024                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1025                 priv->clk = IUU_CLK_6000000;
1026                 /* Ratio of 6000000 to 3500000 for baud 9600 */
1027                 result =
1028                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
1029                                   IUU_PARITY_EVEN);
1030                 break;
1031         default:                /*  3.579 Mhz */
1032                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1033                 priv->clk = IUU_CLK_3579000;
1034                 result =
1035                     iuu_uart_baud(port, baud * boost / 100, &actual,
1036                                   IUU_PARITY_EVEN);
1037         }
1038
1039         /* set the cardin cardout signals */
1040         switch (cdmode) {
1041         case 0:
1042                 iuu_cardin = 0;
1043                 iuu_cardout = 0;
1044                 break;
1045         case 1:
1046                 iuu_cardin = TIOCM_CD;
1047                 iuu_cardout =  0;
1048                 break;
1049         case 2:
1050                 iuu_cardin = 0;
1051                 iuu_cardout = TIOCM_CD;
1052                 break;
1053         case 3:
1054                 iuu_cardin = TIOCM_DSR;
1055                 iuu_cardout = 0;
1056                 break;
1057         case 4:
1058                 iuu_cardin = 0;
1059                 iuu_cardout = TIOCM_DSR;
1060                 break;
1061         case 5:
1062                 iuu_cardin = TIOCM_CTS;
1063                 iuu_cardout = 0;
1064                 break;
1065         case 6:
1066                 iuu_cardin = 0;
1067                 iuu_cardout = TIOCM_CTS;
1068                 break;
1069         case 7:
1070                 iuu_cardin = TIOCM_RNG;
1071                 iuu_cardout = 0;
1072                 break;
1073         case 8:
1074                 iuu_cardin = 0;
1075                 iuu_cardout = TIOCM_RNG;
1076         }
1077
1078         iuu_uart_flush(port);
1079
1080         dev_dbg(dev, "%s - initialization done\n", __func__);
1081
1082         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1083         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1084                           usb_sndbulkpipe(port->serial->dev,
1085                                           port->bulk_out_endpointAddress),
1086                           port->write_urb->transfer_buffer, 1,
1087                           read_rxcmd_callback, port);
1088         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1089         if (result) {
1090                 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1091                 iuu_close(port);
1092         } else {
1093                 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1094         }
1095
1096         return result;
1097 }
1098
1099 /* how to change VCC */
1100 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1101 {
1102         int status;
1103         u8 *buf;
1104
1105         buf = kmalloc(5, GFP_KERNEL);
1106         if (!buf)
1107                 return -ENOMEM;
1108
1109         buf[0] = IUU_SET_VCC;
1110         buf[1] = vcc & 0xFF;
1111         buf[2] = (vcc >> 8) & 0xFF;
1112         buf[3] = (vcc >> 16) & 0xFF;
1113         buf[4] = (vcc >> 24) & 0xFF;
1114
1115         status = bulk_immediate(port, buf, 5);
1116         kfree(buf);
1117
1118         if (status != IUU_OPERATION_OK)
1119                 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1120         else
1121                 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1122
1123         return status;
1124 }
1125
1126 /*
1127  * Sysfs Attributes
1128  */
1129
1130 static ssize_t vcc_mode_show(struct device *dev,
1131         struct device_attribute *attr, char *buf)
1132 {
1133         struct usb_serial_port *port = to_usb_serial_port(dev);
1134         struct iuu_private *priv = usb_get_serial_port_data(port);
1135
1136         return sprintf(buf, "%d\n", priv->vcc);
1137 }
1138
1139 static ssize_t vcc_mode_store(struct device *dev,
1140         struct device_attribute *attr, const char *buf, size_t count)
1141 {
1142         struct usb_serial_port *port = to_usb_serial_port(dev);
1143         struct iuu_private *priv = usb_get_serial_port_data(port);
1144         unsigned long v;
1145
1146         if (kstrtoul(buf, 10, &v)) {
1147                 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1148                                 __func__, buf);
1149                 goto fail_store_vcc_mode;
1150         }
1151
1152         dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1153
1154         if ((v != 3) && (v != 5)) {
1155                 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1156         } else {
1157                 iuu_vcc_set(port, v);
1158                 priv->vcc = v;
1159         }
1160 fail_store_vcc_mode:
1161         return count;
1162 }
1163 static DEVICE_ATTR_RW(vcc_mode);
1164
1165 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1166 {
1167         return device_create_file(&port->dev, &dev_attr_vcc_mode);
1168 }
1169
1170 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1171 {
1172         device_remove_file(&port->dev, &dev_attr_vcc_mode);
1173         return 0;
1174 }
1175
1176 /*
1177  * End Sysfs Attributes
1178  */
1179
1180 static struct usb_serial_driver iuu_device = {
1181         .driver = {
1182                    .owner = THIS_MODULE,
1183                    .name = "iuu_phoenix",
1184                    },
1185         .id_table = id_table,
1186         .num_ports = 1,
1187         .num_bulk_in = 1,
1188         .num_bulk_out = 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.");