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iuu_phoenix.c
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1 /*
2  * Infinity Unlimited USB Phoenix driver
3  *
4  * Copyright (C) 2010 James Courtier-Dutton ([email protected])
5 
6  * Copyright (C) 2007 Alain Degreffe ([email protected])
7  *
8  * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos Borrás)
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * And tested with help of WB Electronics
16  *
17  */
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/slab.h>
22 #include <linux/tty.h>
23 #include <linux/tty_driver.h>
24 #include <linux/tty_flip.h>
25 #include <linux/serial.h>
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/spinlock.h>
29 #include <linux/uaccess.h>
30 #include <linux/usb.h>
31 #include <linux/usb/serial.h>
32 #include "iuu_phoenix.h"
33 #include <linux/random.h>
34 
35 /*
36  * Version Information
37  */
38 #define DRIVER_VERSION "v0.12"
39 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
40 
41 static const struct usb_device_id id_table[] = {
42  {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
43  {} /* Terminating entry */
44 };
45 MODULE_DEVICE_TABLE(usb, id_table);
46 
47 /* turbo parameter */
48 static int boost = 100;
49 static int clockmode = 1;
50 static int cdmode = 1;
51 static int iuu_cardin;
52 static int iuu_cardout;
53 static bool xmas;
54 static int vcc_default = 5;
55 
56 static int iuu_create_sysfs_attrs(struct usb_serial_port *port);
57 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port);
58 static void read_rxcmd_callback(struct urb *urb);
59 
60 struct iuu_private {
61  spinlock_t lock; /* store irq state */
62  wait_queue_head_t delta_msr_wait;
63  u8 line_status;
64  int tiostatus; /* store IUART SIGNAL for tiocmget call */
65  u8 reset; /* if 1 reset is needed */
66  int poll; /* number of poll */
67  u8 *writebuf; /* buffer for writing to device */
68  int writelen; /* num of byte to write to device */
69  u8 *buf; /* used for initialize speed */
70  u8 len;
71  int vcc; /* vcc (either 3 or 5 V) */
72  u32 baud;
73  u32 boost;
74  u32 clk;
75 };
76 
77 static int iuu_port_probe(struct usb_serial_port *port)
78 {
79  struct iuu_private *priv;
80  int ret;
81 
82  priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
83  if (!priv)
84  return -ENOMEM;
85 
86  priv->buf = kzalloc(256, GFP_KERNEL);
87  if (!priv->buf) {
88  kfree(priv);
89  return -ENOMEM;
90  }
91 
92  priv->writebuf = kzalloc(256, GFP_KERNEL);
93  if (!priv->writebuf) {
94  kfree(priv->buf);
95  kfree(priv);
96  return -ENOMEM;
97  }
98 
99  priv->vcc = vcc_default;
100  spin_lock_init(&priv->lock);
101  init_waitqueue_head(&priv->delta_msr_wait);
102 
103  usb_set_serial_port_data(port, priv);
104 
105  ret = iuu_create_sysfs_attrs(port);
106  if (ret) {
107  kfree(priv->writebuf);
108  kfree(priv->buf);
109  kfree(priv);
110  return ret;
111  }
112 
113  return 0;
114 }
115 
116 static int iuu_port_remove(struct usb_serial_port *port)
117 {
118  struct iuu_private *priv = usb_get_serial_port_data(port);
119 
120  iuu_remove_sysfs_attrs(port);
121  kfree(priv->writebuf);
122  kfree(priv->buf);
123  kfree(priv);
124 
125  return 0;
126 }
127 
128 static int iuu_tiocmset(struct tty_struct *tty,
129  unsigned int set, unsigned int clear)
130 {
131  struct usb_serial_port *port = tty->driver_data;
132  struct iuu_private *priv = usb_get_serial_port_data(port);
133  unsigned long flags;
134 
135  /* FIXME: locking on tiomstatus */
136  dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
137  __func__, set, clear);
138 
139  spin_lock_irqsave(&priv->lock, flags);
140 
141  if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
142  dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
143  priv->reset = 1;
144  }
145  if (set & TIOCM_RTS)
146  priv->tiostatus = TIOCM_RTS;
147 
148  spin_unlock_irqrestore(&priv->lock, flags);
149  return 0;
150 }
151 
152 /* This is used to provide a carrier detect mechanism
153  * When a card is present, the response is 0x00
154  * When no card , the reader respond with TIOCM_CD
155  * This is known as CD autodetect mechanism
156  */
157 static int iuu_tiocmget(struct tty_struct *tty)
158 {
159  struct usb_serial_port *port = tty->driver_data;
160  struct iuu_private *priv = usb_get_serial_port_data(port);
161  unsigned long flags;
162  int rc;
163 
164  spin_lock_irqsave(&priv->lock, flags);
165  rc = priv->tiostatus;
166  spin_unlock_irqrestore(&priv->lock, flags);
167 
168  return rc;
169 }
170 
171 static void iuu_rxcmd(struct urb *urb)
172 {
173  struct usb_serial_port *port = urb->context;
174  int result;
175  int status = urb->status;
176 
177  if (status) {
178  dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
179  /* error stop all */
180  return;
181  }
182 
183 
184  memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
185  usb_fill_bulk_urb(port->write_urb, port->serial->dev,
186  usb_sndbulkpipe(port->serial->dev,
187  port->bulk_out_endpointAddress),
188  port->write_urb->transfer_buffer, 1,
189  read_rxcmd_callback, port);
190  result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
191 }
192 
193 static int iuu_reset(struct usb_serial_port *port, u8 wt)
194 {
195  struct iuu_private *priv = usb_get_serial_port_data(port);
196  int result;
197  char *buf_ptr = port->write_urb->transfer_buffer;
198 
199  /* Prepare the reset sequence */
200 
201  *buf_ptr++ = IUU_RST_SET;
202  *buf_ptr++ = IUU_DELAY_MS;
203  *buf_ptr++ = wt;
204  *buf_ptr = IUU_RST_CLEAR;
205 
206  /* send the sequence */
207 
208  usb_fill_bulk_urb(port->write_urb,
209  port->serial->dev,
210  usb_sndbulkpipe(port->serial->dev,
211  port->bulk_out_endpointAddress),
212  port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
213  result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
214  priv->reset = 0;
215  return result;
216 }
217 
218 /* Status Function
219  * Return value is
220  * 0x00 = no card
221  * 0x01 = smartcard
222  * 0x02 = sim card
223  */
224 static void iuu_update_status_callback(struct urb *urb)
225 {
226  struct usb_serial_port *port = urb->context;
227  struct iuu_private *priv = usb_get_serial_port_data(port);
228  u8 *st;
229  int status = urb->status;
230 
231  if (status) {
232  dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
233  /* error stop all */
234  return;
235  }
236 
237  st = urb->transfer_buffer;
238  dev_dbg(&port->dev, "%s - enter\n", __func__);
239  if (urb->actual_length == 1) {
240  switch (st[0]) {
241  case 0x1:
242  priv->tiostatus = iuu_cardout;
243  break;
244  case 0x0:
245  priv->tiostatus = iuu_cardin;
246  break;
247  default:
248  priv->tiostatus = iuu_cardin;
249  }
250  }
251  iuu_rxcmd(urb);
252 }
253 
254 static void iuu_status_callback(struct urb *urb)
255 {
256  struct usb_serial_port *port = urb->context;
257  int result;
258  int status = urb->status;
259 
260  dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
261  usb_fill_bulk_urb(port->read_urb, port->serial->dev,
262  usb_rcvbulkpipe(port->serial->dev,
263  port->bulk_in_endpointAddress),
264  port->read_urb->transfer_buffer, 256,
265  iuu_update_status_callback, port);
266  result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
267 }
268 
269 static int iuu_status(struct usb_serial_port *port)
270 {
271  int result;
272 
273  memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
274  usb_fill_bulk_urb(port->write_urb, port->serial->dev,
275  usb_sndbulkpipe(port->serial->dev,
276  port->bulk_out_endpointAddress),
277  port->write_urb->transfer_buffer, 1,
278  iuu_status_callback, port);
279  result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
280  return result;
281 
282 }
283 
284 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
285 {
286  int status;
287  struct usb_serial *serial = port->serial;
288  int actual = 0;
289 
290  /* send the data out the bulk port */
291 
292  status =
293  usb_bulk_msg(serial->dev,
294  usb_sndbulkpipe(serial->dev,
295  port->bulk_out_endpointAddress), buf,
296  count, &actual, HZ * 1);
297 
298  if (status != IUU_OPERATION_OK)
299  dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
300  else
301  dev_dbg(&port->dev, "%s - write OK !\n", __func__);
302  return status;
303 }
304 
305 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
306 {
307  int status;
308  struct usb_serial *serial = port->serial;
309  int actual = 0;
310 
311  /* send the data out the bulk port */
312  status =
313  usb_bulk_msg(serial->dev,
314  usb_rcvbulkpipe(serial->dev,
315  port->bulk_in_endpointAddress), buf,
316  count, &actual, HZ * 1);
317 
318  if (status != IUU_OPERATION_OK)
319  dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
320  else
321  dev_dbg(&port->dev, "%s - read OK !\n", __func__);
322  return status;
323 }
324 
325 static int iuu_led(struct usb_serial_port *port, unsigned int R,
326  unsigned int G, unsigned int B, u8 f)
327 {
328  int status;
329  u8 *buf;
330  buf = kmalloc(8, GFP_KERNEL);
331  if (!buf)
332  return -ENOMEM;
333 
334  buf[0] = IUU_SET_LED;
335  buf[1] = R & 0xFF;
336  buf[2] = (R >> 8) & 0xFF;
337  buf[3] = G & 0xFF;
338  buf[4] = (G >> 8) & 0xFF;
339  buf[5] = B & 0xFF;
340  buf[6] = (B >> 8) & 0xFF;
341  buf[7] = f;
342  status = bulk_immediate(port, buf, 8);
343  kfree(buf);
344  if (status != IUU_OPERATION_OK)
345  dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
346  else
347  dev_dbg(&port->dev, "%s - led OK !\n", __func__);
348  return IUU_OPERATION_OK;
349 }
350 
351 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
352  u8 b2, u8 freq)
353 {
354  *buf++ = IUU_SET_LED;
355  *buf++ = r1;
356  *buf++ = r2;
357  *buf++ = g1;
358  *buf++ = g2;
359  *buf++ = b1;
360  *buf++ = b2;
361  *buf = freq;
362 }
363 
364 static void iuu_led_activity_on(struct urb *urb)
365 {
366  struct usb_serial_port *port = urb->context;
367  int result;
368  char *buf_ptr = port->write_urb->transfer_buffer;
369  *buf_ptr++ = IUU_SET_LED;
370  if (xmas == 1) {
371  get_random_bytes(buf_ptr, 6);
372  *(buf_ptr+7) = 1;
373  } else {
374  iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
375  }
376 
377  usb_fill_bulk_urb(port->write_urb, port->serial->dev,
378  usb_sndbulkpipe(port->serial->dev,
379  port->bulk_out_endpointAddress),
380  port->write_urb->transfer_buffer, 8 ,
381  iuu_rxcmd, port);
382  result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
383 }
384 
385 static void iuu_led_activity_off(struct urb *urb)
386 {
387  struct usb_serial_port *port = urb->context;
388  int result;
389  char *buf_ptr = port->write_urb->transfer_buffer;
390  if (xmas == 1) {
391  iuu_rxcmd(urb);
392  return;
393  } else {
394  *buf_ptr++ = IUU_SET_LED;
395  iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
396  }
397  usb_fill_bulk_urb(port->write_urb, port->serial->dev,
398  usb_sndbulkpipe(port->serial->dev,
399  port->bulk_out_endpointAddress),
400  port->write_urb->transfer_buffer, 8 ,
401  iuu_rxcmd, port);
402  result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
403 }
404 
405 
406 
407 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
408 {
409  int status;
410  struct iuu_private *priv = usb_get_serial_port_data(port);
411  int Count = 0;
412  u8 FrqGenAdr = 0x69;
413  u8 DIV = 0; /* 8bit */
414  u8 XDRV = 0; /* 8bit */
415  u8 PUMP = 0; /* 3bit */
416  u8 PBmsb = 0; /* 2bit */
417  u8 PBlsb = 0; /* 8bit */
418  u8 PO = 0; /* 1bit */
419  u8 Q = 0; /* 7bit */
420  /* 24bit = 3bytes */
421  unsigned int P = 0;
422  unsigned int P2 = 0;
423  int frq = (int)dwFrq;
424 
425  if (frq == 0) {
426  priv->buf[Count++] = IUU_UART_WRITE_I2C;
427  priv->buf[Count++] = FrqGenAdr << 1;
428  priv->buf[Count++] = 0x09;
429  priv->buf[Count++] = 0x00;
430 
431  status = bulk_immediate(port, (u8 *) priv->buf, Count);
432  if (status != 0) {
433  dev_dbg(&port->dev, "%s - write error\n", __func__);
434  return status;
435  }
436  } else if (frq == 3579000) {
437  DIV = 100;
438  P = 1193;
439  Q = 40;
440  XDRV = 0;
441  } else if (frq == 3680000) {
442  DIV = 105;
443  P = 161;
444  Q = 5;
445  XDRV = 0;
446  } else if (frq == 6000000) {
447  DIV = 66;
448  P = 66;
449  Q = 2;
450  XDRV = 0x28;
451  } else {
452  unsigned int result = 0;
453  unsigned int tmp = 0;
454  unsigned int check;
455  unsigned int check2;
456  char found = 0x00;
457  unsigned int lQ = 2;
458  unsigned int lP = 2055;
459  unsigned int lDiv = 4;
460 
461  for (lQ = 2; lQ <= 47 && !found; lQ++)
462  for (lP = 2055; lP >= 8 && !found; lP--)
463  for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
464  tmp = (12000000 / lDiv) * (lP / lQ);
465  if (abs((int)(tmp - frq)) <
466  abs((int)(frq - result))) {
467  check2 = (12000000 / lQ);
468  if (check2 < 250000)
469  continue;
470  check = (12000000 / lQ) * lP;
471  if (check > 400000000)
472  continue;
473  if (check < 100000000)
474  continue;
475  if (lDiv < 4 || lDiv > 127)
476  continue;
477  result = tmp;
478  P = lP;
479  DIV = lDiv;
480  Q = lQ;
481  if (result == frq)
482  found = 0x01;
483  }
484  }
485  }
486  P2 = ((P - PO) / 2) - 4;
487  DIV = DIV;
488  PUMP = 0x04;
489  PBmsb = (P2 >> 8 & 0x03);
490  PBlsb = P2 & 0xFF;
491  PO = (P >> 10) & 0x01;
492  Q = Q - 2;
493 
494  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
495  priv->buf[Count++] = FrqGenAdr << 1;
496  priv->buf[Count++] = 0x09;
497  priv->buf[Count++] = 0x20; /* Adr = 0x09 */
498  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
499  priv->buf[Count++] = FrqGenAdr << 1;
500  priv->buf[Count++] = 0x0C;
501  priv->buf[Count++] = DIV; /* Adr = 0x0C */
502  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
503  priv->buf[Count++] = FrqGenAdr << 1;
504  priv->buf[Count++] = 0x12;
505  priv->buf[Count++] = XDRV; /* Adr = 0x12 */
506  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
507  priv->buf[Count++] = FrqGenAdr << 1;
508  priv->buf[Count++] = 0x13;
509  priv->buf[Count++] = 0x6B; /* Adr = 0x13 */
510  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
511  priv->buf[Count++] = FrqGenAdr << 1;
512  priv->buf[Count++] = 0x40;
513  priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
514  (PBmsb & 0x03); /* Adr = 0x40 */
515  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
516  priv->buf[Count++] = FrqGenAdr << 1;
517  priv->buf[Count++] = 0x41;
518  priv->buf[Count++] = PBlsb; /* Adr = 0x41 */
519  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
520  priv->buf[Count++] = FrqGenAdr << 1;
521  priv->buf[Count++] = 0x42;
522  priv->buf[Count++] = Q | (((PO & 0x01) << 7)); /* Adr = 0x42 */
523  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
524  priv->buf[Count++] = FrqGenAdr << 1;
525  priv->buf[Count++] = 0x44;
526  priv->buf[Count++] = (char)0xFF; /* Adr = 0x44 */
527  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
528  priv->buf[Count++] = FrqGenAdr << 1;
529  priv->buf[Count++] = 0x45;
530  priv->buf[Count++] = (char)0xFE; /* Adr = 0x45 */
531  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
532  priv->buf[Count++] = FrqGenAdr << 1;
533  priv->buf[Count++] = 0x46;
534  priv->buf[Count++] = 0x7F; /* Adr = 0x46 */
535  priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
536  priv->buf[Count++] = FrqGenAdr << 1;
537  priv->buf[Count++] = 0x47;
538  priv->buf[Count++] = (char)0x84; /* Adr = 0x47 */
539 
540  status = bulk_immediate(port, (u8 *) priv->buf, Count);
541  if (status != IUU_OPERATION_OK)
542  dev_dbg(&port->dev, "%s - write error\n", __func__);
543  return status;
544 }
545 
546 static int iuu_uart_flush(struct usb_serial_port *port)
547 {
548  struct device *dev = &port->dev;
549  int i;
550  int status;
551  u8 rxcmd = IUU_UART_RX;
552  struct iuu_private *priv = usb_get_serial_port_data(port);
553 
554  if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
555  return -EIO;
556 
557  for (i = 0; i < 2; i++) {
558  status = bulk_immediate(port, &rxcmd, 1);
559  if (status != IUU_OPERATION_OK) {
560  dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
561  return status;
562  }
563 
564  status = read_immediate(port, &priv->len, 1);
565  if (status != IUU_OPERATION_OK) {
566  dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
567  return status;
568  }
569 
570  if (priv->len > 0) {
571  dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
572  status = read_immediate(port, priv->buf, priv->len);
573  if (status != IUU_OPERATION_OK) {
574  dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
575  return status;
576  }
577  }
578  }
579  dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
580  iuu_led(port, 0, 0xF000, 0, 0xFF);
581  return status;
582 }
583 
584 static void read_buf_callback(struct urb *urb)
585 {
586  struct usb_serial_port *port = urb->context;
587  unsigned char *data = urb->transfer_buffer;
588  struct tty_struct *tty;
589  int status = urb->status;
590 
591  if (status) {
592  if (status == -EPROTO) {
593  /* reschedule needed */
594  }
595  return;
596  }
597 
598  dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
599  tty = tty_port_tty_get(&port->port);
600  if (data == NULL)
601  dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
602  if (tty && urb->actual_length && data) {
603  tty_insert_flip_string(tty, data, urb->actual_length);
604  tty_flip_buffer_push(tty);
605  }
606  tty_kref_put(tty);
607  iuu_led_activity_on(urb);
608 }
609 
610 static int iuu_bulk_write(struct usb_serial_port *port)
611 {
612  struct iuu_private *priv = usb_get_serial_port_data(port);
613  unsigned long flags;
614  int result;
615  int buf_len;
616  char *buf_ptr = port->write_urb->transfer_buffer;
617 
618  spin_lock_irqsave(&priv->lock, flags);
619  *buf_ptr++ = IUU_UART_ESC;
620  *buf_ptr++ = IUU_UART_TX;
621  *buf_ptr++ = priv->writelen;
622 
623  memcpy(buf_ptr, priv->writebuf, priv->writelen);
624  buf_len = priv->writelen;
625  priv->writelen = 0;
626  spin_unlock_irqrestore(&priv->lock, flags);
627  dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
628  buf_len, buf_len, buf_ptr);
629  usb_fill_bulk_urb(port->write_urb, port->serial->dev,
630  usb_sndbulkpipe(port->serial->dev,
631  port->bulk_out_endpointAddress),
632  port->write_urb->transfer_buffer, buf_len + 3,
633  iuu_rxcmd, port);
634  result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
635  usb_serial_port_softint(port);
636  return result;
637 }
638 
639 static int iuu_read_buf(struct usb_serial_port *port, int len)
640 {
641  int result;
642 
643  usb_fill_bulk_urb(port->read_urb, port->serial->dev,
644  usb_rcvbulkpipe(port->serial->dev,
645  port->bulk_in_endpointAddress),
646  port->read_urb->transfer_buffer, len,
647  read_buf_callback, port);
648  result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
649  return result;
650 }
651 
652 static void iuu_uart_read_callback(struct urb *urb)
653 {
654  struct usb_serial_port *port = urb->context;
655  struct iuu_private *priv = usb_get_serial_port_data(port);
656  unsigned long flags;
657  int status = urb->status;
658  int error = 0;
659  int len = 0;
660  unsigned char *data = urb->transfer_buffer;
661  priv->poll++;
662 
663  if (status) {
664  dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
665  /* error stop all */
666  return;
667  }
668  if (data == NULL)
669  dev_dbg(&port->dev, "%s - data is NULL !!!\n", __func__);
670 
671  if (urb->actual_length == 1 && data != NULL)
672  len = (int) data[0];
673 
674  if (urb->actual_length > 1) {
675  dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
676  urb->actual_length);
677  error = 1;
678  return;
679  }
680  /* if len > 0 call readbuf */
681 
682  if (len > 0 && error == 0) {
683  dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
684  __func__, len);
685  status = iuu_read_buf(port, len);
686  return;
687  }
688  /* need to update status ? */
689  if (priv->poll > 99) {
690  status = iuu_status(port);
691  priv->poll = 0;
692  return;
693  }
694 
695  /* reset waiting ? */
696 
697  if (priv->reset == 1) {
698  status = iuu_reset(port, 0xC);
699  return;
700  }
701  /* Writebuf is waiting */
702  spin_lock_irqsave(&priv->lock, flags);
703  if (priv->writelen > 0) {
704  spin_unlock_irqrestore(&priv->lock, flags);
705  status = iuu_bulk_write(port);
706  return;
707  }
708  spin_unlock_irqrestore(&priv->lock, flags);
709  /* if nothing to write call again rxcmd */
710  dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
711  iuu_led_activity_off(urb);
712 }
713 
714 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
715  const u8 *buf, int count)
716 {
717  struct iuu_private *priv = usb_get_serial_port_data(port);
718  unsigned long flags;
719 
720  if (count > 256)
721  return -ENOMEM;
722 
723  spin_lock_irqsave(&priv->lock, flags);
724 
725  /* fill the buffer */
726  memcpy(priv->writebuf + priv->writelen, buf, count);
727  priv->writelen += count;
728  spin_unlock_irqrestore(&priv->lock, flags);
729 
730  return count;
731 }
732 
733 static void read_rxcmd_callback(struct urb *urb)
734 {
735  struct usb_serial_port *port = urb->context;
736  int result;
737  int status = urb->status;
738 
739  if (status) {
740  /* error stop all */
741  return;
742  }
743 
744  usb_fill_bulk_urb(port->read_urb, port->serial->dev,
745  usb_rcvbulkpipe(port->serial->dev,
746  port->bulk_in_endpointAddress),
747  port->read_urb->transfer_buffer, 256,
748  iuu_uart_read_callback, port);
749  result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
750  dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
751 }
752 
753 static int iuu_uart_on(struct usb_serial_port *port)
754 {
755  int status;
756  u8 *buf;
757 
758  buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
759 
760  if (!buf)
761  return -ENOMEM;
762 
763  buf[0] = IUU_UART_ENABLE;
764  buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
765  buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
766  buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
767 
768  status = bulk_immediate(port, buf, 4);
769  if (status != IUU_OPERATION_OK) {
770  dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
771  goto uart_enable_failed;
772  }
773  /* iuu_reset() the card after iuu_uart_on() */
774  status = iuu_uart_flush(port);
775  if (status != IUU_OPERATION_OK)
776  dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
777 uart_enable_failed:
778  kfree(buf);
779  return status;
780 }
781 
782 /* Diables the IUU UART (a.k.a. the Phoenix voiderface) */
783 static int iuu_uart_off(struct usb_serial_port *port)
784 {
785  int status;
786  u8 *buf;
787  buf = kmalloc(1, GFP_KERNEL);
788  if (!buf)
789  return -ENOMEM;
790  buf[0] = IUU_UART_DISABLE;
791 
792  status = bulk_immediate(port, buf, 1);
793  if (status != IUU_OPERATION_OK)
794  dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
795 
796  kfree(buf);
797  return status;
798 }
799 
800 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
801  u32 *actual, u8 parity)
802 {
803  int status;
804  u32 baud;
805  u8 *dataout;
806  u8 DataCount = 0;
807  u8 T1Frekvens = 0;
808  u8 T1reload = 0;
809  unsigned int T1FrekvensHZ = 0;
810 
811  dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
812  dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
813 
814  if (!dataout)
815  return -ENOMEM;
816  /*baud = (((priv->clk / 35) * baud_base) / 100000); */
817  baud = baud_base;
818 
819  if (baud < 1200 || baud > 230400) {
820  kfree(dataout);
821  return IUU_INVALID_PARAMETER;
822  }
823  if (baud > 977) {
824  T1Frekvens = 3;
825  T1FrekvensHZ = 500000;
826  }
827 
828  if (baud > 3906) {
829  T1Frekvens = 2;
830  T1FrekvensHZ = 2000000;
831  }
832 
833  if (baud > 11718) {
834  T1Frekvens = 1;
835  T1FrekvensHZ = 6000000;
836  }
837 
838  if (baud > 46875) {
839  T1Frekvens = 0;
840  T1FrekvensHZ = 24000000;
841  }
842 
843  T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
844 
845  /* magic number here: ENTER_FIRMWARE_UPDATE; */
846  dataout[DataCount++] = IUU_UART_ESC;
847  /* magic number here: CHANGE_BAUD; */
848  dataout[DataCount++] = IUU_UART_CHANGE;
849  dataout[DataCount++] = T1Frekvens;
850  dataout[DataCount++] = T1reload;
851 
852  *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
853 
854  switch (parity & 0x0F) {
855  case IUU_PARITY_NONE:
856  dataout[DataCount++] = 0x00;
857  break;
858  case IUU_PARITY_EVEN:
859  dataout[DataCount++] = 0x01;
860  break;
861  case IUU_PARITY_ODD:
862  dataout[DataCount++] = 0x02;
863  break;
864  case IUU_PARITY_MARK:
865  dataout[DataCount++] = 0x03;
866  break;
867  case IUU_PARITY_SPACE:
868  dataout[DataCount++] = 0x04;
869  break;
870  default:
871  kfree(dataout);
872  return IUU_INVALID_PARAMETER;
873  break;
874  }
875 
876  switch (parity & 0xF0) {
877  case IUU_ONE_STOP_BIT:
878  dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
879  break;
880 
881  case IUU_TWO_STOP_BITS:
882  dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
883  break;
884  default:
885  kfree(dataout);
886  return IUU_INVALID_PARAMETER;
887  break;
888  }
889 
890  status = bulk_immediate(port, dataout, DataCount);
891  if (status != IUU_OPERATION_OK)
892  dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
893  kfree(dataout);
894  return status;
895 }
896 
897 static void iuu_set_termios(struct tty_struct *tty,
898  struct usb_serial_port *port, struct ktermios *old_termios)
899 {
900  const u32 supported_mask = CMSPAR|PARENB|PARODD;
901  struct iuu_private *priv = usb_get_serial_port_data(port);
902  unsigned int cflag = tty->termios.c_cflag;
903  int status;
904  u32 actual;
905  u32 parity;
906  int csize = CS7;
907  int baud;
908  u32 newval = cflag & supported_mask;
909 
910  /* Just use the ospeed. ispeed should be the same. */
911  baud = tty->termios.c_ospeed;
912 
913  dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
914 
915  /* compute the parity parameter */
916  parity = 0;
917  if (cflag & CMSPAR) { /* Using mark space */
918  if (cflag & PARODD)
919  parity |= IUU_PARITY_SPACE;
920  else
921  parity |= IUU_PARITY_MARK;
922  } else if (!(cflag & PARENB)) {
923  parity |= IUU_PARITY_NONE;
924  csize = CS8;
925  } else if (cflag & PARODD)
926  parity |= IUU_PARITY_ODD;
927  else
928  parity |= IUU_PARITY_EVEN;
929 
930  parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
931 
932  /* set it */
933  status = iuu_uart_baud(port,
934  baud * priv->boost / 100,
935  &actual, parity);
936 
937  /* set the termios value to the real one, so the user now what has
938  * changed. We support few fields so its easies to copy the old hw
939  * settings back over and then adjust them
940  */
941  if (old_termios)
942  tty_termios_copy_hw(&tty->termios, old_termios);
943  if (status != 0) /* Set failed - return old bits */
944  return;
945  /* Re-encode speed, parity and csize */
946  tty_encode_baud_rate(tty, baud, baud);
947  tty->termios.c_cflag &= ~(supported_mask|CSIZE);
948  tty->termios.c_cflag |= newval | csize;
949 }
950 
951 static void iuu_close(struct usb_serial_port *port)
952 {
953  /* iuu_led (port,255,0,0,0); */
954  struct usb_serial *serial;
955 
956  serial = port->serial;
957  if (!serial)
958  return;
959 
960  iuu_uart_off(port);
961  if (serial->dev) {
962  /* free writebuf */
963  /* shutdown our urbs */
964  dev_dbg(&port->dev, "%s - shutting down urbs\n", __func__);
965  usb_kill_urb(port->write_urb);
966  usb_kill_urb(port->read_urb);
967  usb_kill_urb(port->interrupt_in_urb);
968  iuu_led(port, 0, 0, 0xF000, 0xFF);
969  }
970 }
971 
972 static void iuu_init_termios(struct tty_struct *tty)
973 {
974  tty->termios = tty_std_termios;
975  tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
976  | TIOCM_CTS | CSTOPB | PARENB;
977  tty->termios.c_ispeed = 9600;
978  tty->termios.c_ospeed = 9600;
979  tty->termios.c_lflag = 0;
980  tty->termios.c_oflag = 0;
981  tty->termios.c_iflag = 0;
982 }
983 
984 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
985 {
986  struct usb_serial *serial = port->serial;
987  struct device *dev = &port->dev;
988  u8 *buf;
989  int result;
990  int baud;
991  u32 actual;
992  struct iuu_private *priv = usb_get_serial_port_data(port);
993 
994  baud = tty->termios.c_ospeed;
995  tty->termios.c_ispeed = baud;
996  /* Re-encode speed */
997  tty_encode_baud_rate(tty, baud, baud);
998 
999  dev_dbg(dev, "%s - baud %d\n", __func__, baud);
1000  usb_clear_halt(serial->dev, port->write_urb->pipe);
1001  usb_clear_halt(serial->dev, port->read_urb->pipe);
1002 
1003  buf = kmalloc(10, GFP_KERNEL);
1004  if (buf == NULL)
1005  return -ENOMEM;
1006 
1007  priv->poll = 0;
1008 
1009  /* initialize writebuf */
1010 #define FISH(a, b, c, d) do { \
1011  result = usb_control_msg(port->serial->dev, \
1012  usb_rcvctrlpipe(port->serial->dev, 0), \
1013  b, a, c, d, buf, 1, 1000); \
1014  dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n", a, b, c, d, result, \
1015  buf[0]); } while (0);
1016 
1017 #define SOUP(a, b, c, d) do { \
1018  result = usb_control_msg(port->serial->dev, \
1019  usb_sndctrlpipe(port->serial->dev, 0), \
1020  b, a, c, d, NULL, 0, 1000); \
1021  dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x %d\n", a, b, c, d, result); } while (0)
1022 
1023  /* This is not UART related but IUU USB driver related or something */
1024  /* like that. Basically no IUU will accept any commands from the USB */
1025  /* host unless it has received the following message */
1026  /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1027 
1028  SOUP(0x03, 0x02, 0x02, 0x0);
1029  kfree(buf);
1030  iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1031  iuu_uart_on(port);
1032  if (boost < 100)
1033  boost = 100;
1034  priv->boost = boost;
1035  priv->baud = baud;
1036  switch (clockmode) {
1037  case 2: /* 3.680 Mhz */
1038  priv->clk = IUU_CLK_3680000;
1039  iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1040  result =
1041  iuu_uart_baud(port, baud * boost / 100, &actual,
1042  IUU_PARITY_EVEN);
1043  break;
1044  case 3: /* 6.00 Mhz */
1045  iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1046  priv->clk = IUU_CLK_6000000;
1047  /* Ratio of 6000000 to 3500000 for baud 9600 */
1048  result =
1049  iuu_uart_baud(port, 16457 * boost / 100, &actual,
1050  IUU_PARITY_EVEN);
1051  break;
1052  default: /* 3.579 Mhz */
1053  iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1054  priv->clk = IUU_CLK_3579000;
1055  result =
1056  iuu_uart_baud(port, baud * boost / 100, &actual,
1057  IUU_PARITY_EVEN);
1058  }
1059 
1060  /* set the cardin cardout signals */
1061  switch (cdmode) {
1062  case 0:
1063  iuu_cardin = 0;
1064  iuu_cardout = 0;
1065  break;
1066  case 1:
1067  iuu_cardin = TIOCM_CD;
1068  iuu_cardout = 0;
1069  break;
1070  case 2:
1071  iuu_cardin = 0;
1072  iuu_cardout = TIOCM_CD;
1073  break;
1074  case 3:
1075  iuu_cardin = TIOCM_DSR;
1076  iuu_cardout = 0;
1077  break;
1078  case 4:
1079  iuu_cardin = 0;
1080  iuu_cardout = TIOCM_DSR;
1081  break;
1082  case 5:
1083  iuu_cardin = TIOCM_CTS;
1084  iuu_cardout = 0;
1085  break;
1086  case 6:
1087  iuu_cardin = 0;
1088  iuu_cardout = TIOCM_CTS;
1089  break;
1090  case 7:
1091  iuu_cardin = TIOCM_RNG;
1092  iuu_cardout = 0;
1093  break;
1094  case 8:
1095  iuu_cardin = 0;
1096  iuu_cardout = TIOCM_RNG;
1097  }
1098 
1099  iuu_uart_flush(port);
1100 
1101  dev_dbg(dev, "%s - initialization done\n", __func__);
1102 
1103  memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1104  usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1105  usb_sndbulkpipe(port->serial->dev,
1106  port->bulk_out_endpointAddress),
1107  port->write_urb->transfer_buffer, 1,
1108  read_rxcmd_callback, port);
1109  result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1110  if (result) {
1111  dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1112  iuu_close(port);
1113  } else {
1114  dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1115  }
1116 
1117  return result;
1118 }
1119 
1120 /* how to change VCC */
1121 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1122 {
1123  int status;
1124  u8 *buf;
1125 
1126  buf = kmalloc(5, GFP_KERNEL);
1127  if (!buf)
1128  return -ENOMEM;
1129 
1130  buf[0] = IUU_SET_VCC;
1131  buf[1] = vcc & 0xFF;
1132  buf[2] = (vcc >> 8) & 0xFF;
1133  buf[3] = (vcc >> 16) & 0xFF;
1134  buf[4] = (vcc >> 24) & 0xFF;
1135 
1136  status = bulk_immediate(port, buf, 5);
1137  kfree(buf);
1138 
1139  if (status != IUU_OPERATION_OK)
1140  dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1141  else
1142  dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1143 
1144  return status;
1145 }
1146 
1147 /*
1148  * Sysfs Attributes
1149  */
1150 
1151 static ssize_t show_vcc_mode(struct device *dev,
1152  struct device_attribute *attr, char *buf)
1153 {
1154  struct usb_serial_port *port = to_usb_serial_port(dev);
1155  struct iuu_private *priv = usb_get_serial_port_data(port);
1156 
1157  return sprintf(buf, "%d\n", priv->vcc);
1158 }
1159 
1160 static ssize_t store_vcc_mode(struct device *dev,
1161  struct device_attribute *attr, const char *buf, size_t count)
1162 {
1163  struct usb_serial_port *port = to_usb_serial_port(dev);
1164  struct iuu_private *priv = usb_get_serial_port_data(port);
1165  unsigned long v;
1166 
1167  if (strict_strtoul(buf, 10, &v)) {
1168  dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1169  __func__, buf);
1170  goto fail_store_vcc_mode;
1171  }
1172 
1173  dev_dbg(dev, "%s: setting vcc_mode = %ld", __func__, v);
1174 
1175  if ((v != 3) && (v != 5)) {
1176  dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1177  } else {
1178  iuu_vcc_set(port, v);
1179  priv->vcc = v;
1180  }
1181 fail_store_vcc_mode:
1182  return count;
1183 }
1184 
1185 static DEVICE_ATTR(vcc_mode, S_IRUSR | S_IWUSR, show_vcc_mode,
1186  store_vcc_mode);
1187 
1188 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1189 {
1190  return device_create_file(&port->dev, &dev_attr_vcc_mode);
1191 }
1192 
1193 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1194 {
1195  device_remove_file(&port->dev, &dev_attr_vcc_mode);
1196  return 0;
1197 }
1198 
1199 /*
1200  * End Sysfs Attributes
1201  */
1202 
1203 static struct usb_serial_driver iuu_device = {
1204  .driver = {
1205  .owner = THIS_MODULE,
1206  .name = "iuu_phoenix",
1207  },
1208  .id_table = id_table,
1209  .num_ports = 1,
1210  .bulk_in_size = 512,
1211  .bulk_out_size = 512,
1212  .open = iuu_open,
1213  .close = iuu_close,
1214  .write = iuu_uart_write,
1215  .read_bulk_callback = iuu_uart_read_callback,
1216  .tiocmget = iuu_tiocmget,
1217  .tiocmset = iuu_tiocmset,
1218  .set_termios = iuu_set_termios,
1219  .init_termios = iuu_init_termios,
1220  .port_probe = iuu_port_probe,
1221  .port_remove = iuu_port_remove,
1222 };
1223 
1224 static struct usb_serial_driver * const serial_drivers[] = {
1225  &iuu_device, NULL
1226 };
1227 
1228 module_usb_serial_driver(serial_drivers, id_table);
1229 
1230 MODULE_AUTHOR("Alain Degreffe [email protected]");
1231 
1232 MODULE_DESCRIPTION(DRIVER_DESC);
1233 MODULE_LICENSE("GPL");
1234 
1235 MODULE_VERSION(DRIVER_VERSION);
1236 
1237 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1238 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1239 
1240 module_param(boost, int, S_IRUGO | S_IWUSR);
1241 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1242 
1243 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1244 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1245  "3=6 Mhz)");
1246 
1247 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1248 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1249  "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1250 
1251 module_param(vcc_default, int, S_IRUGO | S_IWUSR);
1252 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1253  "for 5V). Default to 5.");
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