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