Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/drivers/usb/serial/iuu_phoenix.c

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

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