drivers/usb/serial/iuu_phoenix.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Infinity Unlimited USB Phoenix driver
   4  *
   5  * Copyright (C) 2010 James Courtier-Dutton (James@superbug.co.uk)
   6
   7  * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
   8  *
   9  * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos BorrÃ¡s)
  10  *
  11  *  And tested with help of WB Electronics
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/errno.h>
  15 #include <linux/slab.h>
  16 #include <linux/tty.h>
  17 #include <linux/tty_driver.h>
  18 #include <linux/tty_flip.h>
  19 #include <linux/serial.h>
  20 #include <linux/module.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/uaccess.h>
  24 #include <linux/usb.h>
  25 #include <linux/usb/serial.h>
  26 #include "iuu_phoenix.h"
  27 #include <linux/random.h>
  28
  29 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
  30
  31 static const struct usb_device_id id_table[] = {
  32         {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
  33         {}                      /* Terminating entry */
  34 };
  35 MODULE_DEVICE_TABLE(usb, id_table);
  36
  37 /* turbo parameter */
  38 static int boost = 100;
  39 static int clockmode = 1;
  40 static int cdmode = 1;
  41 static int iuu_cardin;
  42 static int iuu_cardout;
  43 static bool xmas;
  44 static int vcc_default = 5;
  45
  46 static int iuu_create_sysfs_attrs(struct usb_serial_port *port);
  47 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port);
  48 static void read_rxcmd_callback(struct urb *urb);
  49
  50 struct iuu_private {
  51         spinlock_t lock;        /* store irq state */
  52         u8 line_status;
  53         int tiostatus;          /* store IUART SIGNAL for tiocmget call */
  54         u8 reset;               /* if 1 reset is needed */
  55         int poll;               /* number of poll */
  56         u8 *writebuf;           /* buffer for writing to device */
  57         int writelen;           /* num of byte to write to device */
  58         u8 *buf;                /* used for initialize speed */
  59         u8 len;
  60         int vcc;                /* vcc (either 3 or 5 V) */
  61         u32 baud;
  62         u32 boost;
  63         u32 clk;
  64 };
  65
  66 static int iuu_port_probe(struct usb_serial_port *port)
  67 {
  68         struct iuu_private *priv;
  69         int ret;
  70
  71         priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
  72         if (!priv)
  73                 return -ENOMEM;
  74
  75         priv->buf = kzalloc(256, GFP_KERNEL);
  76         if (!priv->buf) {
  77                 kfree(priv);
  78                 return -ENOMEM;
  79         }
  80
  81         priv->writebuf = kzalloc(256, GFP_KERNEL);
  82         if (!priv->writebuf) {
  83                 kfree(priv->buf);
  84                 kfree(priv);
  85                 return -ENOMEM;
  86         }
  87
  88         priv->vcc = vcc_default;
  89         spin_lock_init(&priv->lock);
  90
  91         usb_set_serial_port_data(port, priv);
  92
  93         ret = iuu_create_sysfs_attrs(port);
  94         if (ret) {
  95                 kfree(priv->writebuf);
  96                 kfree(priv->buf);
  97                 kfree(priv);
  98                 return ret;
  99         }
 100
 101         return 0;
 102 }
 103
 104 static int iuu_port_remove(struct usb_serial_port *port)
 105 {
 106         struct iuu_private *priv = usb_get_serial_port_data(port);
 107
 108         iuu_remove_sysfs_attrs(port);
 109         kfree(priv->writebuf);
 110         kfree(priv->buf);
 111         kfree(priv);
 112
 113         return 0;
 114 }
 115
 116 static int iuu_tiocmset(struct tty_struct *tty,
 117                         unsigned int set, unsigned int clear)
 118 {
 119         struct usb_serial_port *port = tty->driver_data;
 120         struct iuu_private *priv = usb_get_serial_port_data(port);
 121         unsigned long flags;
 122
 123         /* FIXME: locking on tiomstatus */
 124         dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
 125                 __func__, set, clear);
 126
 127         spin_lock_irqsave(&priv->lock, flags);
 128
 129         if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
 130                 dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
 131                 priv->reset = 1;
 132         }
 133         if (set & TIOCM_RTS)
 134                 priv->tiostatus = TIOCM_RTS;
 135
 136         spin_unlock_irqrestore(&priv->lock, flags);
 137         return 0;
 138 }
 139
 140 /* This is used to provide a carrier detect mechanism
 141  * When a card is present, the response is 0x00
 142  * When no card , the reader respond with TIOCM_CD
 143  * This is known as CD autodetect mechanism
 144  */
 145 static int iuu_tiocmget(struct tty_struct *tty)
 146 {
 147         struct usb_serial_port *port = tty->driver_data;
 148         struct iuu_private *priv = usb_get_serial_port_data(port);
 149         unsigned long flags;
 150         int rc;
 151
 152         spin_lock_irqsave(&priv->lock, flags);
 153         rc = priv->tiostatus;
 154         spin_unlock_irqrestore(&priv->lock, flags);
 155
 156         return rc;
 157 }
 158
 159 static void iuu_rxcmd(struct urb *urb)
 160 {
 161         struct usb_serial_port *port = urb->context;
 162         int result;
 163         int status = urb->status;
 164
 165         if (status) {
 166                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 167                 /* error stop all */
 168                 return;
 169         }
 170
 171
 172         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
 173         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 174                           usb_sndbulkpipe(port->serial->dev,
 175                                           port->bulk_out_endpointAddress),
 176                           port->write_urb->transfer_buffer, 1,
 177                           read_rxcmd_callback, port);
 178         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 179 }
 180
 181 static int iuu_reset(struct usb_serial_port *port, u8 wt)
 182 {
 183         struct iuu_private *priv = usb_get_serial_port_data(port);
 184         int result;
 185         char *buf_ptr = port->write_urb->transfer_buffer;
 186
 187         /* Prepare the reset sequence */
 188
 189         *buf_ptr++ = IUU_RST_SET;
 190         *buf_ptr++ = IUU_DELAY_MS;
 191         *buf_ptr++ = wt;
 192         *buf_ptr = IUU_RST_CLEAR;
 193
 194         /* send the sequence */
 195
 196         usb_fill_bulk_urb(port->write_urb,
 197                           port->serial->dev,
 198                           usb_sndbulkpipe(port->serial->dev,
 199                                           port->bulk_out_endpointAddress),
 200                           port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
 201         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 202         priv->reset = 0;
 203         return result;
 204 }
 205
 206 /* Status Function
 207  * Return value is
 208  * 0x00 = no card
 209  * 0x01 = smartcard
 210  * 0x02 = sim card
 211  */
 212 static void iuu_update_status_callback(struct urb *urb)
 213 {
 214         struct usb_serial_port *port = urb->context;
 215         struct iuu_private *priv = usb_get_serial_port_data(port);
 216         u8 *st;
 217         int status = urb->status;
 218
 219         if (status) {
 220                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 221                 /* error stop all */
 222                 return;
 223         }
 224
 225         st = urb->transfer_buffer;
 226         dev_dbg(&port->dev, "%s - enter\n", __func__);
 227         if (urb->actual_length == 1) {
 228                 switch (st[0]) {
 229                 case 0x1:
 230                         priv->tiostatus = iuu_cardout;
 231                         break;
 232                 case 0x0:
 233                         priv->tiostatus = iuu_cardin;
 234                         break;
 235                 default:
 236                         priv->tiostatus = iuu_cardin;
 237                 }
 238         }
 239         iuu_rxcmd(urb);
 240 }
 241
 242 static void iuu_status_callback(struct urb *urb)
 243 {
 244         struct usb_serial_port *port = urb->context;
 245         int result;
 246         int status = urb->status;
 247
 248         dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 249         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 250                           usb_rcvbulkpipe(port->serial->dev,
 251                                           port->bulk_in_endpointAddress),
 252                           port->read_urb->transfer_buffer, 256,
 253                           iuu_update_status_callback, port);
 254         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 255 }
 256
 257 static int iuu_status(struct usb_serial_port *port)
 258 {
 259         int result;
 260
 261         memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
 262         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 263                           usb_sndbulkpipe(port->serial->dev,
 264                                           port->bulk_out_endpointAddress),
 265                           port->write_urb->transfer_buffer, 1,
 266                           iuu_status_callback, port);
 267         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 268         return result;
 269
 270 }
 271
 272 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 273 {
 274         int status;
 275         struct usb_serial *serial = port->serial;
 276         int actual = 0;
 277
 278         /* send the data out the bulk port */
 279
 280         status =
 281             usb_bulk_msg(serial->dev,
 282                          usb_sndbulkpipe(serial->dev,
 283                                          port->bulk_out_endpointAddress), buf,
 284                          count, &actual, 1000);
 285
 286         if (status != IUU_OPERATION_OK)
 287                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 288         else
 289                 dev_dbg(&port->dev, "%s - write OK !\n", __func__);
 290         return status;
 291 }
 292
 293 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
 294 {
 295         int status;
 296         struct usb_serial *serial = port->serial;
 297         int actual = 0;
 298
 299         /* send the data out the bulk port */
 300         status =
 301             usb_bulk_msg(serial->dev,
 302                          usb_rcvbulkpipe(serial->dev,
 303                                          port->bulk_in_endpointAddress), buf,
 304                          count, &actual, 1000);
 305
 306         if (status != IUU_OPERATION_OK)
 307                 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
 308         else
 309                 dev_dbg(&port->dev, "%s - read OK !\n", __func__);
 310         return status;
 311 }
 312
 313 static int iuu_led(struct usb_serial_port *port, unsigned int R,
 314                    unsigned int G, unsigned int B, u8 f)
 315 {
 316         int status;
 317         u8 *buf;
 318         buf = kmalloc(8, GFP_KERNEL);
 319         if (!buf)
 320                 return -ENOMEM;
 321
 322         buf[0] = IUU_SET_LED;
 323         buf[1] = R & 0xFF;
 324         buf[2] = (R >> 8) & 0xFF;
 325         buf[3] = G & 0xFF;
 326         buf[4] = (G >> 8) & 0xFF;
 327         buf[5] = B & 0xFF;
 328         buf[6] = (B >> 8) & 0xFF;
 329         buf[7] = f;
 330         status = bulk_immediate(port, buf, 8);
 331         kfree(buf);
 332         if (status != IUU_OPERATION_OK)
 333                 dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
 334         else
 335                 dev_dbg(&port->dev, "%s - led OK !\n", __func__);
 336         return IUU_OPERATION_OK;
 337 }
 338
 339 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
 340                                  u8 b2, u8 freq)
 341 {
 342         *buf++ = IUU_SET_LED;
 343         *buf++ = r1;
 344         *buf++ = r2;
 345         *buf++ = g1;
 346         *buf++ = g2;
 347         *buf++ = b1;
 348         *buf++ = b2;
 349         *buf = freq;
 350 }
 351
 352 static void iuu_led_activity_on(struct urb *urb)
 353 {
 354         struct usb_serial_port *port = urb->context;
 355         int result;
 356         char *buf_ptr = port->write_urb->transfer_buffer;
 357         *buf_ptr++ = IUU_SET_LED;
 358         if (xmas) {
 359                 get_random_bytes(buf_ptr, 6);
 360                 *(buf_ptr+7) = 1;
 361         } else {
 362                 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
 363         }
 364
 365         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 366                           usb_sndbulkpipe(port->serial->dev,
 367                                           port->bulk_out_endpointAddress),
 368                           port->write_urb->transfer_buffer, 8 ,
 369                           iuu_rxcmd, port);
 370         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 371 }
 372
 373 static void iuu_led_activity_off(struct urb *urb)
 374 {
 375         struct usb_serial_port *port = urb->context;
 376         int result;
 377         char *buf_ptr = port->write_urb->transfer_buffer;
 378         if (xmas) {
 379                 iuu_rxcmd(urb);
 380                 return;
 381         } else {
 382                 *buf_ptr++ = IUU_SET_LED;
 383                 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
 384         }
 385         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 386                           usb_sndbulkpipe(port->serial->dev,
 387                                           port->bulk_out_endpointAddress),
 388                           port->write_urb->transfer_buffer, 8 ,
 389                           iuu_rxcmd, port);
 390         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 391 }
 392
 393
 394
 395 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
 396 {
 397         int status;
 398         struct iuu_private *priv = usb_get_serial_port_data(port);
 399         int Count = 0;
 400         u8 FrqGenAdr = 0x69;
 401         u8 DIV = 0;             /* 8bit */
 402         u8 XDRV = 0;            /* 8bit */
 403         u8 PUMP = 0;            /* 3bit */
 404         u8 PBmsb = 0;           /* 2bit */
 405         u8 PBlsb = 0;           /* 8bit */
 406         u8 PO = 0;              /* 1bit */
 407         u8 Q = 0;               /* 7bit */
 408         /* 24bit = 3bytes */
 409         unsigned int P = 0;
 410         unsigned int P2 = 0;
 411         int frq = (int)dwFrq;
 412
 413         if (frq == 0) {
 414                 priv->buf[Count++] = IUU_UART_WRITE_I2C;
 415                 priv->buf[Count++] = FrqGenAdr << 1;
 416                 priv->buf[Count++] = 0x09;
 417                 priv->buf[Count++] = 0x00;
 418
 419                 status = bulk_immediate(port, (u8 *) priv->buf, Count);
 420                 if (status != 0) {
 421                         dev_dbg(&port->dev, "%s - write error\n", __func__);
 422                         return status;
 423                 }
 424         } else if (frq == 3579000) {
 425                 DIV = 100;
 426                 P = 1193;
 427                 Q = 40;
 428                 XDRV = 0;
 429         } else if (frq == 3680000) {
 430                 DIV = 105;
 431                 P = 161;
 432                 Q = 5;
 433                 XDRV = 0;
 434         } else if (frq == 6000000) {
 435                 DIV = 66;
 436                 P = 66;
 437                 Q = 2;
 438                 XDRV = 0x28;
 439         } else {
 440                 unsigned int result = 0;
 441                 unsigned int tmp = 0;
 442                 unsigned int check;
 443                 unsigned int check2;
 444                 char found = 0x00;
 445                 unsigned int lQ = 2;
 446                 unsigned int lP = 2055;
 447                 unsigned int lDiv = 4;
 448
 449                 for (lQ = 2; lQ <= 47 && !found; lQ++)
 450                         for (lP = 2055; lP >= 8 && !found; lP--)
 451                                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
 452                                         tmp = (12000000 / lDiv) * (lP / lQ);
 453                                         if (abs((int)(tmp - frq)) <
 454                                             abs((int)(frq - result))) {
 455                                                 check2 = (12000000 / lQ);
 456                                                 if (check2 < 250000)
 457                                                         continue;
 458                                                 check = (12000000 / lQ) * lP;
 459                                                 if (check > 400000000)
 460                                                         continue;
 461                                                 if (check < 100000000)
 462                                                         continue;
 463                                                 if (lDiv < 4 || lDiv > 127)
 464                                                         continue;
 465                                                 result = tmp;
 466                                                 P = lP;
 467                                                 DIV = lDiv;
 468                                                 Q = lQ;
 469                                                 if (result == frq)
 470                                                         found = 0x01;
 471                                         }
 472                                 }
 473         }
 474         P2 = ((P - PO) / 2) - 4;
 475         PUMP = 0x04;
 476         PBmsb = (P2 >> 8 & 0x03);
 477         PBlsb = P2 & 0xFF;
 478         PO = (P >> 10) & 0x01;
 479         Q = Q - 2;
 480
 481         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 482         priv->buf[Count++] = FrqGenAdr << 1;
 483         priv->buf[Count++] = 0x09;
 484         priv->buf[Count++] = 0x20;      /* Adr = 0x09 */
 485         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 486         priv->buf[Count++] = FrqGenAdr << 1;
 487         priv->buf[Count++] = 0x0C;
 488         priv->buf[Count++] = DIV;       /* Adr = 0x0C */
 489         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /* 0x4C */
 490         priv->buf[Count++] = FrqGenAdr << 1;
 491         priv->buf[Count++] = 0x12;
 492         priv->buf[Count++] = XDRV;      /* Adr = 0x12 */
 493         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 494         priv->buf[Count++] = FrqGenAdr << 1;
 495         priv->buf[Count++] = 0x13;
 496         priv->buf[Count++] = 0x6B;      /* Adr = 0x13 */
 497         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 498         priv->buf[Count++] = FrqGenAdr << 1;
 499         priv->buf[Count++] = 0x40;
 500         priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
 501                              (PBmsb & 0x03);    /* Adr = 0x40 */
 502         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 503         priv->buf[Count++] = FrqGenAdr << 1;
 504         priv->buf[Count++] = 0x41;
 505         priv->buf[Count++] = PBlsb;     /* Adr = 0x41 */
 506         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 507         priv->buf[Count++] = FrqGenAdr << 1;
 508         priv->buf[Count++] = 0x42;
 509         priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
 510         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 511         priv->buf[Count++] = FrqGenAdr << 1;
 512         priv->buf[Count++] = 0x44;
 513         priv->buf[Count++] = (char)0xFF;        /* Adr = 0x44 */
 514         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 515         priv->buf[Count++] = FrqGenAdr << 1;
 516         priv->buf[Count++] = 0x45;
 517         priv->buf[Count++] = (char)0xFE;        /* Adr = 0x45 */
 518         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 519         priv->buf[Count++] = FrqGenAdr << 1;
 520         priv->buf[Count++] = 0x46;
 521         priv->buf[Count++] = 0x7F;      /* Adr = 0x46 */
 522         priv->buf[Count++] = IUU_UART_WRITE_I2C;        /*  0x4C */
 523         priv->buf[Count++] = FrqGenAdr << 1;
 524         priv->buf[Count++] = 0x47;
 525         priv->buf[Count++] = (char)0x84;        /* Adr = 0x47 */
 526
 527         status = bulk_immediate(port, (u8 *) priv->buf, Count);
 528         if (status != IUU_OPERATION_OK)
 529                 dev_dbg(&port->dev, "%s - write error\n", __func__);
 530         return status;
 531 }
 532
 533 static int iuu_uart_flush(struct usb_serial_port *port)
 534 {
 535         struct device *dev = &port->dev;
 536         int i;
 537         int status;
 538         u8 rxcmd = IUU_UART_RX;
 539         struct iuu_private *priv = usb_get_serial_port_data(port);
 540
 541         if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
 542                 return -EIO;
 543
 544         for (i = 0; i < 2; i++) {
 545                 status = bulk_immediate(port, &rxcmd, 1);
 546                 if (status != IUU_OPERATION_OK) {
 547                         dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
 548                         return status;
 549                 }
 550
 551                 status = read_immediate(port, &priv->len, 1);
 552                 if (status != IUU_OPERATION_OK) {
 553                         dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 554                         return status;
 555                 }
 556
 557                 if (priv->len > 0) {
 558                         dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
 559                         status = read_immediate(port, priv->buf, priv->len);
 560                         if (status != IUU_OPERATION_OK) {
 561                                 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
 562                                 return status;
 563                         }
 564                 }
 565         }
 566         dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
 567         iuu_led(port, 0, 0xF000, 0, 0xFF);
 568         return status;
 569 }
 570
 571 static void read_buf_callback(struct urb *urb)
 572 {
 573         struct usb_serial_port *port = urb->context;
 574         unsigned char *data = urb->transfer_buffer;
 575         int status = urb->status;
 576
 577         if (status) {
 578                 if (status == -EPROTO) {
 579                         /* reschedule needed */
 580                 }
 581                 return;
 582         }
 583
 584         dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
 585
 586         if (urb->actual_length) {
 587                 tty_insert_flip_string(&port->port, data, urb->actual_length);
 588                 tty_flip_buffer_push(&port->port);
 589         }
 590         iuu_led_activity_on(urb);
 591 }
 592
 593 static int iuu_bulk_write(struct usb_serial_port *port)
 594 {
 595         struct iuu_private *priv = usb_get_serial_port_data(port);
 596         unsigned long flags;
 597         int result;
 598         int buf_len;
 599         char *buf_ptr = port->write_urb->transfer_buffer;
 600
 601         spin_lock_irqsave(&priv->lock, flags);
 602         *buf_ptr++ = IUU_UART_ESC;
 603         *buf_ptr++ = IUU_UART_TX;
 604         *buf_ptr++ = priv->writelen;
 605
 606         memcpy(buf_ptr, priv->writebuf, priv->writelen);
 607         buf_len = priv->writelen;
 608         priv->writelen = 0;
 609         spin_unlock_irqrestore(&priv->lock, flags);
 610         dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
 611                 buf_len, buf_len, buf_ptr);
 612         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
 613                           usb_sndbulkpipe(port->serial->dev,
 614                                           port->bulk_out_endpointAddress),
 615                           port->write_urb->transfer_buffer, buf_len + 3,
 616                           iuu_rxcmd, port);
 617         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 618         usb_serial_port_softint(port);
 619         return result;
 620 }
 621
 622 static int iuu_read_buf(struct usb_serial_port *port, int len)
 623 {
 624         int result;
 625
 626         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 627                           usb_rcvbulkpipe(port->serial->dev,
 628                                           port->bulk_in_endpointAddress),
 629                           port->read_urb->transfer_buffer, len,
 630                           read_buf_callback, port);
 631         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 632         return result;
 633 }
 634
 635 static void iuu_uart_read_callback(struct urb *urb)
 636 {
 637         struct usb_serial_port *port = urb->context;
 638         struct iuu_private *priv = usb_get_serial_port_data(port);
 639         unsigned long flags;
 640         int status = urb->status;
 641         int error = 0;
 642         int len = 0;
 643         unsigned char *data = urb->transfer_buffer;
 644         priv->poll++;
 645
 646         if (status) {
 647                 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
 648                 /* error stop all */
 649                 return;
 650         }
 651
 652         if (urb->actual_length == 1)
 653                 len = (int) data[0];
 654
 655         if (urb->actual_length > 1) {
 656                 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
 657                     urb->actual_length);
 658                 error = 1;
 659                 return;
 660         }
 661         /* if len > 0 call readbuf */
 662
 663         if (len > 0 && error == 0) {
 664                 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
 665                         __func__, len);
 666                 status = iuu_read_buf(port, len);
 667                 return;
 668         }
 669         /* need to update status  ? */
 670         if (priv->poll > 99) {
 671                 status = iuu_status(port);
 672                 priv->poll = 0;
 673                 return;
 674         }
 675
 676         /* reset waiting ? */
 677
 678         if (priv->reset == 1) {
 679                 status = iuu_reset(port, 0xC);
 680                 return;
 681         }
 682         /* Writebuf is waiting */
 683         spin_lock_irqsave(&priv->lock, flags);
 684         if (priv->writelen > 0) {
 685                 spin_unlock_irqrestore(&priv->lock, flags);
 686                 status = iuu_bulk_write(port);
 687                 return;
 688         }
 689         spin_unlock_irqrestore(&priv->lock, flags);
 690         /* if nothing to write call again rxcmd */
 691         dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
 692         iuu_led_activity_off(urb);
 693 }
 694
 695 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
 696                           const u8 *buf, int count)
 697 {
 698         struct iuu_private *priv = usb_get_serial_port_data(port);
 699         unsigned long flags;
 700
 701         if (count > 256)
 702                 return -ENOMEM;
 703
 704         spin_lock_irqsave(&priv->lock, flags);
 705
 706         /* fill the buffer */
 707         memcpy(priv->writebuf + priv->writelen, buf, count);
 708         priv->writelen += count;
 709         spin_unlock_irqrestore(&priv->lock, flags);
 710
 711         return count;
 712 }
 713
 714 static void read_rxcmd_callback(struct urb *urb)
 715 {
 716         struct usb_serial_port *port = urb->context;
 717         int result;
 718         int status = urb->status;
 719
 720         if (status) {
 721                 /* error stop all */
 722                 return;
 723         }
 724
 725         usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 726                           usb_rcvbulkpipe(port->serial->dev,
 727                                           port->bulk_in_endpointAddress),
 728                           port->read_urb->transfer_buffer, 256,
 729                           iuu_uart_read_callback, port);
 730         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 731         dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
 732 }
 733
 734 static int iuu_uart_on(struct usb_serial_port *port)
 735 {
 736         int status;
 737         u8 *buf;
 738
 739         buf = kmalloc(4, GFP_KERNEL);
 740
 741         if (!buf)
 742                 return -ENOMEM;
 743
 744         buf[0] = IUU_UART_ENABLE;
 745         buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
 746         buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
 747         buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
 748
 749         status = bulk_immediate(port, buf, 4);
 750         if (status != IUU_OPERATION_OK) {
 751                 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
 752                 goto uart_enable_failed;
 753         }
 754         /*  iuu_reset() the card after iuu_uart_on() */
 755         status = iuu_uart_flush(port);
 756         if (status != IUU_OPERATION_OK)
 757                 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
 758 uart_enable_failed:
 759         kfree(buf);
 760         return status;
 761 }
 762
 763 /*  Disables the IUU UART (a.k.a. the Phoenix voiderface) */
 764 static int iuu_uart_off(struct usb_serial_port *port)
 765 {
 766         int status;
 767         u8 *buf;
 768         buf = kmalloc(1, GFP_KERNEL);
 769         if (!buf)
 770                 return -ENOMEM;
 771         buf[0] = IUU_UART_DISABLE;
 772
 773         status = bulk_immediate(port, buf, 1);
 774         if (status != IUU_OPERATION_OK)
 775                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 776
 777         kfree(buf);
 778         return status;
 779 }
 780
 781 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
 782                          u32 *actual, u8 parity)
 783 {
 784         int status;
 785         u32 baud;
 786         u8 *dataout;
 787         u8 DataCount = 0;
 788         u8 T1Frekvens = 0;
 789         u8 T1reload = 0;
 790         unsigned int T1FrekvensHZ = 0;
 791
 792         dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
 793         dataout = kmalloc(5, GFP_KERNEL);
 794
 795         if (!dataout)
 796                 return -ENOMEM;
 797         /*baud = (((priv->clk / 35) * baud_base) / 100000); */
 798         baud = baud_base;
 799
 800         if (baud < 1200 || baud > 230400) {
 801                 kfree(dataout);
 802                 return IUU_INVALID_PARAMETER;
 803         }
 804         if (baud > 977) {
 805                 T1Frekvens = 3;
 806                 T1FrekvensHZ = 500000;
 807         }
 808
 809         if (baud > 3906) {
 810                 T1Frekvens = 2;
 811                 T1FrekvensHZ = 2000000;
 812         }
 813
 814         if (baud > 11718) {
 815                 T1Frekvens = 1;
 816                 T1FrekvensHZ = 6000000;
 817         }
 818
 819         if (baud > 46875) {
 820                 T1Frekvens = 0;
 821                 T1FrekvensHZ = 24000000;
 822         }
 823
 824         T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
 825
 826         /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
 827         dataout[DataCount++] = IUU_UART_ESC;
 828         /*  magic number here:  CHANGE_BAUD; */
 829         dataout[DataCount++] = IUU_UART_CHANGE;
 830         dataout[DataCount++] = T1Frekvens;
 831         dataout[DataCount++] = T1reload;
 832
 833         *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
 834
 835         switch (parity & 0x0F) {
 836         case IUU_PARITY_NONE:
 837                 dataout[DataCount++] = 0x00;
 838                 break;
 839         case IUU_PARITY_EVEN:
 840                 dataout[DataCount++] = 0x01;
 841                 break;
 842         case IUU_PARITY_ODD:
 843                 dataout[DataCount++] = 0x02;
 844                 break;
 845         case IUU_PARITY_MARK:
 846                 dataout[DataCount++] = 0x03;
 847                 break;
 848         case IUU_PARITY_SPACE:
 849                 dataout[DataCount++] = 0x04;
 850                 break;
 851         default:
 852                 kfree(dataout);
 853                 return IUU_INVALID_PARAMETER;
 854                 break;
 855         }
 856
 857         switch (parity & 0xF0) {
 858         case IUU_ONE_STOP_BIT:
 859                 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
 860                 break;
 861
 862         case IUU_TWO_STOP_BITS:
 863                 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
 864                 break;
 865         default:
 866                 kfree(dataout);
 867                 return IUU_INVALID_PARAMETER;
 868                 break;
 869         }
 870
 871         status = bulk_immediate(port, dataout, DataCount);
 872         if (status != IUU_OPERATION_OK)
 873                 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
 874         kfree(dataout);
 875         return status;
 876 }
 877
 878 static void iuu_set_termios(struct tty_struct *tty,
 879                 struct usb_serial_port *port, struct ktermios *old_termios)
 880 {
 881         const u32 supported_mask = CMSPAR|PARENB|PARODD;
 882         struct iuu_private *priv = usb_get_serial_port_data(port);
 883         unsigned int cflag = tty->termios.c_cflag;
 884         int status;
 885         u32 actual;
 886         u32 parity;
 887         int csize = CS7;
 888         int baud;
 889         u32 newval = cflag & supported_mask;
 890
 891         /* Just use the ospeed. ispeed should be the same. */
 892         baud = tty->termios.c_ospeed;
 893
 894         dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
 895
 896         /* compute the parity parameter */
 897         parity = 0;
 898         if (cflag & CMSPAR) {   /* Using mark space */
 899                 if (cflag & PARODD)
 900                         parity |= IUU_PARITY_SPACE;
 901                 else
 902                         parity |= IUU_PARITY_MARK;
 903         } else if (!(cflag & PARENB)) {
 904                 parity |= IUU_PARITY_NONE;
 905                 csize = CS8;
 906         } else if (cflag & PARODD)
 907                 parity |= IUU_PARITY_ODD;
 908         else
 909                 parity |= IUU_PARITY_EVEN;
 910
 911         parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
 912
 913         /* set it */
 914         status = iuu_uart_baud(port,
 915                         baud * priv->boost / 100,
 916                         &actual, parity);
 917
 918         /* set the termios value to the real one, so the user now what has
 919          * changed. We support few fields so its easies to copy the old hw
 920          * settings back over and then adjust them
 921          */
 922         if (old_termios)
 923                 tty_termios_copy_hw(&tty->termios, old_termios);
 924         if (status != 0)        /* Set failed - return old bits */
 925                 return;
 926         /* Re-encode speed, parity and csize */
 927         tty_encode_baud_rate(tty, baud, baud);
 928         tty->termios.c_cflag &= ~(supported_mask|CSIZE);
 929         tty->termios.c_cflag |= newval | csize;
 930 }
 931
 932 static void iuu_close(struct usb_serial_port *port)
 933 {
 934         /* iuu_led (port,255,0,0,0); */
 935
 936         iuu_uart_off(port);
 937
 938         usb_kill_urb(port->write_urb);
 939         usb_kill_urb(port->read_urb);
 940
 941         iuu_led(port, 0, 0, 0xF000, 0xFF);
 942 }
 943
 944 static void iuu_init_termios(struct tty_struct *tty)
 945 {
 946         tty->termios = tty_std_termios;
 947         tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
 948                                 | TIOCM_CTS | CSTOPB | PARENB;
 949         tty->termios.c_ispeed = 9600;
 950         tty->termios.c_ospeed = 9600;
 951         tty->termios.c_lflag = 0;
 952         tty->termios.c_oflag = 0;
 953         tty->termios.c_iflag = 0;
 954 }
 955
 956 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
 957 {
 958         struct usb_serial *serial = port->serial;
 959         struct device *dev = &port->dev;
 960         int result;
 961         int baud;
 962         u32 actual;
 963         struct iuu_private *priv = usb_get_serial_port_data(port);
 964
 965         baud = tty->termios.c_ospeed;
 966         tty->termios.c_ispeed = baud;
 967         /* Re-encode speed */
 968         tty_encode_baud_rate(tty, baud, baud);
 969
 970         dev_dbg(dev, "%s - baud %d\n", __func__, baud);
 971         usb_clear_halt(serial->dev, port->write_urb->pipe);
 972         usb_clear_halt(serial->dev, port->read_urb->pipe);
 973
 974         priv->poll = 0;
 975
 976 #define SOUP(a, b, c, d)  do { \
 977         result = usb_control_msg(port->serial->dev,     \
 978                                 usb_sndctrlpipe(port->serial->dev, 0),  \
 979                                 b, a, c, d, NULL, 0, 1000); \
 980         dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d\n", a, b, c, d, result); } while (0)
 981
 982         /*  This is not UART related but IUU USB driver related or something */
 983         /*  like that. Basically no IUU will accept any commands from the USB */
 984         /*  host unless it has received the following message */
 985         /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
 986
 987         SOUP(0x03, 0x02, 0x02, 0x0);
 988
 989         iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
 990         iuu_uart_on(port);
 991         if (boost < 100)
 992                 boost = 100;
 993         priv->boost = boost;
 994         priv->baud = baud;
 995         switch (clockmode) {
 996         case 2:         /*  3.680 Mhz */
 997                 priv->clk = IUU_CLK_3680000;
 998                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
 999                 result =
1000                     iuu_uart_baud(port, baud * boost / 100, &actual,
1001                                   IUU_PARITY_EVEN);
1002                 break;
1003         case 3:         /*  6.00 Mhz */
1004                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1005                 priv->clk = IUU_CLK_6000000;
1006                 /* Ratio of 6000000 to 3500000 for baud 9600 */
1007                 result =
1008                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
1009                                   IUU_PARITY_EVEN);
1010                 break;
1011         default:                /*  3.579 Mhz */
1012                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1013                 priv->clk = IUU_CLK_3579000;
1014                 result =
1015                     iuu_uart_baud(port, baud * boost / 100, &actual,
1016                                   IUU_PARITY_EVEN);
1017         }
1018
1019         /* set the cardin cardout signals */
1020         switch (cdmode) {
1021         case 0:
1022                 iuu_cardin = 0;
1023                 iuu_cardout = 0;
1024                 break;
1025         case 1:
1026                 iuu_cardin = TIOCM_CD;
1027                 iuu_cardout =  0;
1028                 break;
1029         case 2:
1030                 iuu_cardin = 0;
1031                 iuu_cardout = TIOCM_CD;
1032                 break;
1033         case 3:
1034                 iuu_cardin = TIOCM_DSR;
1035                 iuu_cardout = 0;
1036                 break;
1037         case 4:
1038                 iuu_cardin = 0;
1039                 iuu_cardout = TIOCM_DSR;
1040                 break;
1041         case 5:
1042                 iuu_cardin = TIOCM_CTS;
1043                 iuu_cardout = 0;
1044                 break;
1045         case 6:
1046                 iuu_cardin = 0;
1047                 iuu_cardout = TIOCM_CTS;
1048                 break;
1049         case 7:
1050                 iuu_cardin = TIOCM_RNG;
1051                 iuu_cardout = 0;
1052                 break;
1053         case 8:
1054                 iuu_cardin = 0;
1055                 iuu_cardout = TIOCM_RNG;
1056         }
1057
1058         iuu_uart_flush(port);
1059
1060         dev_dbg(dev, "%s - initialization done\n", __func__);
1061
1062         memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1063         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1064                           usb_sndbulkpipe(port->serial->dev,
1065                                           port->bulk_out_endpointAddress),
1066                           port->write_urb->transfer_buffer, 1,
1067                           read_rxcmd_callback, port);
1068         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1069         if (result) {
1070                 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1071                 iuu_close(port);
1072         } else {
1073                 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1074         }
1075
1076         return result;
1077 }
1078
1079 /* how to change VCC */
1080 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1081 {
1082         int status;
1083         u8 *buf;
1084
1085         buf = kmalloc(5, GFP_KERNEL);
1086         if (!buf)
1087                 return -ENOMEM;
1088
1089         buf[0] = IUU_SET_VCC;
1090         buf[1] = vcc & 0xFF;
1091         buf[2] = (vcc >> 8) & 0xFF;
1092         buf[3] = (vcc >> 16) & 0xFF;
1093         buf[4] = (vcc >> 24) & 0xFF;
1094
1095         status = bulk_immediate(port, buf, 5);
1096         kfree(buf);
1097
1098         if (status != IUU_OPERATION_OK)
1099                 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1100         else
1101                 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1102
1103         return status;
1104 }
1105
1106 /*
1107  * Sysfs Attributes
1108  */
1109
1110 static ssize_t vcc_mode_show(struct device *dev,
1111         struct device_attribute *attr, char *buf)
1112 {
1113         struct usb_serial_port *port = to_usb_serial_port(dev);
1114         struct iuu_private *priv = usb_get_serial_port_data(port);
1115
1116         return sprintf(buf, "%d\n", priv->vcc);
1117 }
1118
1119 static ssize_t vcc_mode_store(struct device *dev,
1120         struct device_attribute *attr, const char *buf, size_t count)
1121 {
1122         struct usb_serial_port *port = to_usb_serial_port(dev);
1123         struct iuu_private *priv = usb_get_serial_port_data(port);
1124         unsigned long v;
1125
1126         if (kstrtoul(buf, 10, &v)) {
1127                 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1128                                 __func__, buf);
1129                 goto fail_store_vcc_mode;
1130         }
1131
1132         dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1133
1134         if ((v != 3) && (v != 5)) {
1135                 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1136         } else {
1137                 iuu_vcc_set(port, v);
1138                 priv->vcc = v;
1139         }
1140 fail_store_vcc_mode:
1141         return count;
1142 }
1143 static DEVICE_ATTR_RW(vcc_mode);
1144
1145 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1146 {
1147         return device_create_file(&port->dev, &dev_attr_vcc_mode);
1148 }
1149
1150 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1151 {
1152         device_remove_file(&port->dev, &dev_attr_vcc_mode);
1153         return 0;
1154 }
1155
1156 /*
1157  * End Sysfs Attributes
1158  */
1159
1160 static struct usb_serial_driver iuu_device = {
1161         .driver = {
1162                    .owner = THIS_MODULE,
1163                    .name = "iuu_phoenix",
1164                    },
1165         .id_table = id_table,
1166         .num_ports = 1,
1167         .num_bulk_in = 1,
1168         .num_bulk_out = 1,
1169         .bulk_in_size = 512,
1170         .bulk_out_size = 512,
1171         .open = iuu_open,
1172         .close = iuu_close,
1173         .write = iuu_uart_write,
1174         .read_bulk_callback = iuu_uart_read_callback,
1175         .tiocmget = iuu_tiocmget,
1176         .tiocmset = iuu_tiocmset,
1177         .set_termios = iuu_set_termios,
1178         .init_termios = iuu_init_termios,
1179         .port_probe = iuu_port_probe,
1180         .port_remove = iuu_port_remove,
1181 };
1182
1183 static struct usb_serial_driver * const serial_drivers[] = {
1184         &iuu_device, NULL
1185 };
1186
1187 module_usb_serial_driver(serial_drivers, id_table);
1188
1189 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1190
1191 MODULE_DESCRIPTION(DRIVER_DESC);
1192 MODULE_LICENSE("GPL");
1193
1194 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1195 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1196
1197 module_param(boost, int, S_IRUGO | S_IWUSR);
1198 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1199
1200 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1201 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1202                 "3=6 Mhz)");
1203
1204 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1205 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1206                  "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1207
1208 module_param(vcc_default, int, S_IRUGO | S_IWUSR);
1209 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1210                 "for 5V). Default to 5.");