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USB: removal of tty->low_latency hack dating back to the old serial code
[deliverable/linux.git] / drivers / usb / serial / iuu_phoenix.c
1 /*
2 * Infinity Unlimited USB Phoenix driver
3 *
4 * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
5 *
6 * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos Borrás)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * And tested with help of WB Electronics
14 *
15 */
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/init.h>
19 #include <linux/slab.h>
20 #include <linux/tty.h>
21 #include <linux/tty_driver.h>
22 #include <linux/tty_flip.h>
23 #include <linux/serial.h>
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/spinlock.h>
27 #include <linux/uaccess.h>
28 #include <linux/usb.h>
29 #include <linux/usb/serial.h>
30 #include "iuu_phoenix.h"
31 #include <linux/random.h>
32
33
34 #ifdef CONFIG_USB_SERIAL_DEBUG
35 static int debug = 1;
36 #else
37 static int debug;
38 #endif
39
40 /*
41 * Version Information
42 */
43 #define DRIVER_VERSION "v0.5"
44 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
45
46 static struct usb_device_id id_table[] = {
47 {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
48 {} /* Terminating entry */
49 };
50 MODULE_DEVICE_TABLE(usb, id_table);
51
52 static struct usb_driver iuu_driver = {
53 .name = "iuu_phoenix",
54 .probe = usb_serial_probe,
55 .disconnect = usb_serial_disconnect,
56 .id_table = id_table,
57 .no_dynamic_id = 1,
58 };
59
60 /* turbo parameter */
61 static int boost = 100;
62 static int clockmode = 1;
63 static int cdmode = 1;
64 static int iuu_cardin;
65 static int iuu_cardout;
66 static int xmas;
67
68 static void read_rxcmd_callback(struct urb *urb);
69
70 struct iuu_private {
71 spinlock_t lock; /* store irq state */
72 wait_queue_head_t delta_msr_wait;
73 u8 line_control;
74 u8 line_status;
75 u8 termios_initialized;
76 int tiostatus; /* store IUART SIGNAL for tiocmget call */
77 u8 reset; /* if 1 reset is needed */
78 int poll; /* number of poll */
79 u8 *writebuf; /* buffer for writing to device */
80 int writelen; /* num of byte to write to device */
81 u8 *buf; /* used for initialize speed */
82 u8 *dbgbuf; /* debug buffer */
83 u8 len;
84 };
85
86
87 static void iuu_free_buf(struct iuu_private *priv)
88 {
89 kfree(priv->buf);
90 kfree(priv->dbgbuf);
91 kfree(priv->writebuf);
92 }
93
94 static int iuu_alloc_buf(struct iuu_private *priv)
95 {
96 priv->buf = kzalloc(256, GFP_KERNEL);
97 priv->dbgbuf = kzalloc(256, GFP_KERNEL);
98 priv->writebuf = kzalloc(256, GFP_KERNEL);
99 if (!priv->buf || !priv->dbgbuf || !priv->writebuf) {
100 iuu_free_buf(priv);
101 dbg("%s problem allocation buffer", __func__);
102 return -ENOMEM;
103 }
104 dbg("%s - Privates buffers allocation success", __func__);
105 return 0;
106 }
107
108 static int iuu_startup(struct usb_serial *serial)
109 {
110 struct iuu_private *priv;
111 priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
112 dbg("%s- priv allocation success", __func__);
113 if (!priv)
114 return -ENOMEM;
115 if (iuu_alloc_buf(priv)) {
116 kfree(priv);
117 return -ENOMEM;
118 }
119 spin_lock_init(&priv->lock);
120 init_waitqueue_head(&priv->delta_msr_wait);
121 usb_set_serial_port_data(serial->port[0], priv);
122 return 0;
123 }
124
125 /* Shutdown function */
126 static void iuu_shutdown(struct usb_serial *serial)
127 {
128 struct usb_serial_port *port = serial->port[0];
129 struct iuu_private *priv = usb_get_serial_port_data(port);
130 if (!port)
131 return;
132
133 dbg("%s", __func__);
134
135 if (priv) {
136 iuu_free_buf(priv);
137 dbg("%s - I will free all", __func__);
138 usb_set_serial_port_data(port, NULL);
139
140 dbg("%s - priv is not anymore in port structure", __func__);
141 kfree(priv);
142
143 dbg("%s priv is now kfree", __func__);
144 }
145 }
146
147 static int iuu_tiocmset(struct tty_struct *tty, struct file *file,
148 unsigned int set, unsigned int clear)
149 {
150 struct usb_serial_port *port = tty->driver_data;
151 struct iuu_private *priv = usb_get_serial_port_data(port);
152 unsigned long flags;
153
154 /* FIXME: locking on tiomstatus */
155 dbg("%s (%d) msg : SET = 0x%04x, CLEAR = 0x%04x ", __func__,
156 port->number, set, clear);
157
158 spin_lock_irqsave(&priv->lock, flags);
159 if (set & TIOCM_RTS)
160 priv->tiostatus = TIOCM_RTS;
161
162 if (!(set & TIOCM_RTS) && priv->tiostatus == TIOCM_RTS) {
163 dbg("%s TIOCMSET RESET called !!!", __func__);
164 priv->reset = 1;
165 }
166 spin_unlock_irqrestore(&priv->lock, flags);
167 return 0;
168 }
169
170 /* This is used to provide a carrier detect mechanism
171 * When a card is present, the response is 0x00
172 * When no card , the reader respond with TIOCM_CD
173 * This is known as CD autodetect mechanism
174 */
175 static int iuu_tiocmget(struct tty_struct *tty, struct file *file)
176 {
177 struct usb_serial_port *port = tty->driver_data;
178 struct iuu_private *priv = usb_get_serial_port_data(port);
179 unsigned long flags;
180 int rc;
181
182 spin_lock_irqsave(&priv->lock, flags);
183 rc = priv->tiostatus;
184 spin_unlock_irqrestore(&priv->lock, flags);
185
186 return rc;
187 }
188
189 static void iuu_rxcmd(struct urb *urb)
190 {
191 struct usb_serial_port *port = urb->context;
192 int result;
193 int status = urb->status;
194
195 dbg("%s - enter", __func__);
196
197 if (status) {
198 dbg("%s - status = %d", __func__, status);
199 /* error stop all */
200 return;
201 }
202
203
204 memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
205 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
206 usb_sndbulkpipe(port->serial->dev,
207 port->bulk_out_endpointAddress),
208 port->write_urb->transfer_buffer, 1,
209 read_rxcmd_callback, port);
210 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
211 }
212
213 static int iuu_reset(struct usb_serial_port *port, u8 wt)
214 {
215 struct iuu_private *priv = usb_get_serial_port_data(port);
216 int result;
217 char *buf_ptr = port->write_urb->transfer_buffer;
218 dbg("%s - enter", __func__);
219
220 /* Prepare the reset sequence */
221
222 *buf_ptr++ = IUU_RST_SET;
223 *buf_ptr++ = IUU_DELAY_MS;
224 *buf_ptr++ = wt;
225 *buf_ptr = IUU_RST_CLEAR;
226
227 /* send the sequence */
228
229 usb_fill_bulk_urb(port->write_urb,
230 port->serial->dev,
231 usb_sndbulkpipe(port->serial->dev,
232 port->bulk_out_endpointAddress),
233 port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
234 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
235 priv->reset = 0;
236 return result;
237 }
238
239 /* Status Function
240 * Return value is
241 * 0x00 = no card
242 * 0x01 = smartcard
243 * 0x02 = sim card
244 */
245 static void iuu_update_status_callback(struct urb *urb)
246 {
247 struct usb_serial_port *port = urb->context;
248 struct iuu_private *priv = usb_get_serial_port_data(port);
249 u8 *st;
250 int status = urb->status;
251
252 dbg("%s - enter", __func__);
253
254 if (status) {
255 dbg("%s - status = %d", __func__, status);
256 /* error stop all */
257 return;
258 }
259
260 st = urb->transfer_buffer;
261 dbg("%s - enter", __func__);
262 if (urb->actual_length == 1) {
263 switch (st[0]) {
264 case 0x1:
265 priv->tiostatus = iuu_cardout;
266 break;
267 case 0x0:
268 priv->tiostatus = iuu_cardin;
269 break;
270 default:
271 priv->tiostatus = iuu_cardin;
272 }
273 }
274 iuu_rxcmd(urb);
275 }
276
277 static void iuu_status_callback(struct urb *urb)
278 {
279 struct usb_serial_port *port = urb->context;
280 int result;
281 int status = urb->status;
282
283 dbg("%s - status = %d", __func__, status);
284 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
285 usb_rcvbulkpipe(port->serial->dev,
286 port->bulk_in_endpointAddress),
287 port->read_urb->transfer_buffer, 256,
288 iuu_update_status_callback, port);
289 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
290 }
291
292 static int iuu_status(struct usb_serial_port *port)
293 {
294 int result;
295
296 dbg("%s - enter", __func__);
297
298 memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
299 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
300 usb_sndbulkpipe(port->serial->dev,
301 port->bulk_out_endpointAddress),
302 port->write_urb->transfer_buffer, 1,
303 iuu_status_callback, port);
304 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
305 return result;
306
307 }
308
309 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
310 {
311 int status;
312 struct usb_serial *serial = port->serial;
313 int actual = 0;
314
315 dbg("%s - enter", __func__);
316
317 /* send the data out the bulk port */
318
319 status =
320 usb_bulk_msg(serial->dev,
321 usb_sndbulkpipe(serial->dev,
322 port->bulk_out_endpointAddress), buf,
323 count, &actual, HZ * 1);
324
325 if (status != IUU_OPERATION_OK)
326 dbg("%s - error = %2x", __func__, status);
327 else
328 dbg("%s - write OK !", __func__);
329 return status;
330 }
331
332 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
333 {
334 int status;
335 struct usb_serial *serial = port->serial;
336 int actual = 0;
337
338 dbg("%s - enter", __func__);
339
340 /* send the data out the bulk port */
341
342 status =
343 usb_bulk_msg(serial->dev,
344 usb_rcvbulkpipe(serial->dev,
345 port->bulk_in_endpointAddress), buf,
346 count, &actual, HZ * 1);
347
348 if (status != IUU_OPERATION_OK)
349 dbg("%s - error = %2x", __func__, status);
350 else
351 dbg("%s - read OK !", __func__);
352 return status;
353 }
354
355 static int iuu_led(struct usb_serial_port *port, unsigned int R,
356 unsigned int G, unsigned int B, u8 f)
357 {
358 int status;
359 u8 *buf;
360 buf = kmalloc(8, GFP_KERNEL);
361 if (!buf)
362 return -ENOMEM;
363
364 dbg("%s - enter", __func__);
365
366 buf[0] = IUU_SET_LED;
367 buf[1] = R & 0xFF;
368 buf[2] = (R >> 8) & 0xFF;
369 buf[3] = G & 0xFF;
370 buf[4] = (G >> 8) & 0xFF;
371 buf[5] = B & 0xFF;
372 buf[6] = (B >> 8) & 0xFF;
373 buf[7] = f;
374 status = bulk_immediate(port, buf, 8);
375 kfree(buf);
376 if (status != IUU_OPERATION_OK)
377 dbg("%s - led error status = %2x", __func__, status);
378 else
379 dbg("%s - led OK !", __func__);
380 return IUU_OPERATION_OK;
381 }
382
383 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
384 u8 b2, u8 freq)
385 {
386 *buf++ = IUU_SET_LED;
387 *buf++ = r1;
388 *buf++ = r2;
389 *buf++ = g1;
390 *buf++ = g2;
391 *buf++ = b1;
392 *buf++ = b2;
393 *buf = freq;
394 }
395
396 static void iuu_led_activity_on(struct urb *urb)
397 {
398 struct usb_serial_port *port = urb->context;
399 int result;
400 char *buf_ptr = port->write_urb->transfer_buffer;
401 *buf_ptr++ = IUU_SET_LED;
402 if (xmas == 1) {
403 get_random_bytes(buf_ptr, 6);
404 *(buf_ptr+7) = 1;
405 } else {
406 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
407 }
408
409 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
410 usb_sndbulkpipe(port->serial->dev,
411 port->bulk_out_endpointAddress),
412 port->write_urb->transfer_buffer, 8 ,
413 iuu_rxcmd, port);
414 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
415 }
416
417 static void iuu_led_activity_off(struct urb *urb)
418 {
419 struct usb_serial_port *port = urb->context;
420 int result;
421 char *buf_ptr = port->write_urb->transfer_buffer;
422 if (xmas == 1) {
423 iuu_rxcmd(urb);
424 return;
425 } else {
426 *buf_ptr++ = IUU_SET_LED;
427 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
428 }
429 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
430 usb_sndbulkpipe(port->serial->dev,
431 port->bulk_out_endpointAddress),
432 port->write_urb->transfer_buffer, 8 ,
433 iuu_rxcmd, port);
434 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
435 }
436
437
438
439 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
440 {
441 int status;
442 struct iuu_private *priv = usb_get_serial_port_data(port);
443 int Count = 0;
444 u8 FrqGenAdr = 0x69;
445 u8 DIV = 0; /* 8bit */
446 u8 XDRV = 0; /* 8bit */
447 u8 PUMP = 0; /* 3bit */
448 u8 PBmsb = 0; /* 2bit */
449 u8 PBlsb = 0; /* 8bit */
450 u8 PO = 0; /* 1bit */
451 u8 Q = 0; /* 7bit */
452 /* 24bit = 3bytes */
453 unsigned int P = 0;
454 unsigned int P2 = 0;
455 int frq = (int)dwFrq;
456
457 dbg("%s - enter", __func__);
458
459 if (frq == 0) {
460 priv->buf[Count++] = IUU_UART_WRITE_I2C;
461 priv->buf[Count++] = FrqGenAdr << 1;
462 priv->buf[Count++] = 0x09;
463 priv->buf[Count++] = 0x00;
464
465 status = bulk_immediate(port, (u8 *) priv->buf, Count);
466 if (status != 0) {
467 dbg("%s - write error ", __func__);
468 return status;
469 }
470 } else if (frq == 3579000) {
471 DIV = 100;
472 P = 1193;
473 Q = 40;
474 XDRV = 0;
475 } else if (frq == 3680000) {
476 DIV = 105;
477 P = 161;
478 Q = 5;
479 XDRV = 0;
480 } else if (frq == 6000000) {
481 DIV = 66;
482 P = 66;
483 Q = 2;
484 XDRV = 0x28;
485 } else {
486 unsigned int result = 0;
487 unsigned int tmp = 0;
488 unsigned int check;
489 unsigned int check2;
490 char found = 0x00;
491 unsigned int lQ = 2;
492 unsigned int lP = 2055;
493 unsigned int lDiv = 4;
494
495 for (lQ = 2; lQ <= 47 && !found; lQ++)
496 for (lP = 2055; lP >= 8 && !found; lP--)
497 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
498 tmp = (12000000 / lDiv) * (lP / lQ);
499 if (abs((int)(tmp - frq)) <
500 abs((int)(frq - result))) {
501 check2 = (12000000 / lQ);
502 if (check2 < 250000)
503 continue;
504 check = (12000000 / lQ) * lP;
505 if (check > 400000000)
506 continue;
507 if (check < 100000000)
508 continue;
509 if (lDiv < 4 || lDiv > 127)
510 continue;
511 result = tmp;
512 P = lP;
513 DIV = lDiv;
514 Q = lQ;
515 if (result == frq)
516 found = 0x01;
517 }
518 }
519 }
520 P2 = ((P - PO) / 2) - 4;
521 DIV = DIV;
522 PUMP = 0x04;
523 PBmsb = (P2 >> 8 & 0x03);
524 PBlsb = P2 & 0xFF;
525 PO = (P >> 10) & 0x01;
526 Q = Q - 2;
527
528 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
529 priv->buf[Count++] = FrqGenAdr << 1;
530 priv->buf[Count++] = 0x09;
531 priv->buf[Count++] = 0x20; /* Adr = 0x09 */
532 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
533 priv->buf[Count++] = FrqGenAdr << 1;
534 priv->buf[Count++] = 0x0C;
535 priv->buf[Count++] = DIV; /* Adr = 0x0C */
536 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
537 priv->buf[Count++] = FrqGenAdr << 1;
538 priv->buf[Count++] = 0x12;
539 priv->buf[Count++] = XDRV; /* Adr = 0x12 */
540 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
541 priv->buf[Count++] = FrqGenAdr << 1;
542 priv->buf[Count++] = 0x13;
543 priv->buf[Count++] = 0x6B; /* Adr = 0x13 */
544 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
545 priv->buf[Count++] = FrqGenAdr << 1;
546 priv->buf[Count++] = 0x40;
547 priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
548 (PBmsb & 0x03); /* Adr = 0x40 */
549 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
550 priv->buf[Count++] = FrqGenAdr << 1;
551 priv->buf[Count++] = 0x41;
552 priv->buf[Count++] = PBlsb; /* Adr = 0x41 */
553 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
554 priv->buf[Count++] = FrqGenAdr << 1;
555 priv->buf[Count++] = 0x42;
556 priv->buf[Count++] = Q | (((PO & 0x01) << 7)); /* Adr = 0x42 */
557 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
558 priv->buf[Count++] = FrqGenAdr << 1;
559 priv->buf[Count++] = 0x44;
560 priv->buf[Count++] = (char)0xFF; /* Adr = 0x44 */
561 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
562 priv->buf[Count++] = FrqGenAdr << 1;
563 priv->buf[Count++] = 0x45;
564 priv->buf[Count++] = (char)0xFE; /* Adr = 0x45 */
565 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
566 priv->buf[Count++] = FrqGenAdr << 1;
567 priv->buf[Count++] = 0x46;
568 priv->buf[Count++] = 0x7F; /* Adr = 0x46 */
569 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
570 priv->buf[Count++] = FrqGenAdr << 1;
571 priv->buf[Count++] = 0x47;
572 priv->buf[Count++] = (char)0x84; /* Adr = 0x47 */
573
574 status = bulk_immediate(port, (u8 *) priv->buf, Count);
575 if (status != IUU_OPERATION_OK)
576 dbg("%s - write error ", __func__);
577 return status;
578 }
579
580 static int iuu_uart_flush(struct usb_serial_port *port)
581 {
582 int i;
583 int status;
584 u8 rxcmd = IUU_UART_RX;
585 struct iuu_private *priv = usb_get_serial_port_data(port);
586
587 dbg("%s - enter", __func__);
588
589 if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
590 return -EIO;
591
592 for (i = 0; i < 2; i++) {
593 status = bulk_immediate(port, &rxcmd, 1);
594 if (status != IUU_OPERATION_OK) {
595 dbg("%s - uart_flush_write error", __func__);
596 return status;
597 }
598
599 status = read_immediate(port, &priv->len, 1);
600 if (status != IUU_OPERATION_OK) {
601 dbg("%s - uart_flush_read error", __func__);
602 return status;
603 }
604
605 if (priv->len > 0) {
606 dbg("%s - uart_flush datalen is : %i ", __func__,
607 priv->len);
608 status = read_immediate(port, priv->buf, priv->len);
609 if (status != IUU_OPERATION_OK) {
610 dbg("%s - uart_flush_read error", __func__);
611 return status;
612 }
613 }
614 }
615 dbg("%s - uart_flush_read OK!", __func__);
616 iuu_led(port, 0, 0xF000, 0, 0xFF);
617 return status;
618 }
619
620 static void read_buf_callback(struct urb *urb)
621 {
622 struct usb_serial_port *port = urb->context;
623 unsigned char *data = urb->transfer_buffer;
624 struct tty_struct *tty;
625 int status = urb->status;
626
627 dbg("%s - status = %d", __func__, status);
628
629 if (status) {
630 if (status == -EPROTO) {
631 /* reschedule needed */
632 }
633 return;
634 }
635
636 dbg("%s - %i chars to write", __func__, urb->actual_length);
637 tty = tty_port_tty_get(&port->port);
638 if (data == NULL)
639 dbg("%s - data is NULL !!!", __func__);
640 if (tty && urb->actual_length && data) {
641 tty_insert_flip_string(tty, data, urb->actual_length);
642 tty_flip_buffer_push(tty);
643 }
644 tty_kref_put(tty);
645 iuu_led_activity_on(urb);
646 }
647
648 static int iuu_bulk_write(struct usb_serial_port *port)
649 {
650 struct iuu_private *priv = usb_get_serial_port_data(port);
651 unsigned long flags;
652 int result;
653 int i;
654 char *buf_ptr = port->write_urb->transfer_buffer;
655 dbg("%s - enter", __func__);
656
657 *buf_ptr++ = IUU_UART_ESC;
658 *buf_ptr++ = IUU_UART_TX;
659 *buf_ptr++ = priv->writelen;
660
661 memcpy(buf_ptr, priv->writebuf,
662 priv->writelen);
663 if (debug == 1) {
664 for (i = 0; i < priv->writelen; i++)
665 sprintf(priv->dbgbuf + i*2 ,
666 "%02X", priv->writebuf[i]);
667 priv->dbgbuf[priv->writelen+i*2] = 0;
668 dbg("%s - writing %i chars : %s", __func__,
669 priv->writelen, priv->dbgbuf);
670 }
671 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
672 usb_sndbulkpipe(port->serial->dev,
673 port->bulk_out_endpointAddress),
674 port->write_urb->transfer_buffer, priv->writelen + 3,
675 iuu_rxcmd, port);
676 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
677 spin_lock_irqsave(&priv->lock, flags);
678 priv->writelen = 0;
679 spin_unlock_irqrestore(&priv->lock, flags);
680 usb_serial_port_softint(port);
681 return result;
682 }
683
684 static int iuu_read_buf(struct usb_serial_port *port, int len)
685 {
686 int result;
687 dbg("%s - enter", __func__);
688
689 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
690 usb_rcvbulkpipe(port->serial->dev,
691 port->bulk_in_endpointAddress),
692 port->read_urb->transfer_buffer, len,
693 read_buf_callback, port);
694 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
695 return result;
696 }
697
698 static void iuu_uart_read_callback(struct urb *urb)
699 {
700 struct usb_serial_port *port = urb->context;
701 struct iuu_private *priv = usb_get_serial_port_data(port);
702 unsigned long flags;
703 int status = urb->status;
704 int error = 0;
705 int len = 0;
706 unsigned char *data = urb->transfer_buffer;
707 priv->poll++;
708
709 dbg("%s - enter", __func__);
710
711 if (status) {
712 dbg("%s - status = %d", __func__, status);
713 /* error stop all */
714 return;
715 }
716 if (data == NULL)
717 dbg("%s - data is NULL !!!", __func__);
718
719 if (urb->actual_length == 1 && data != NULL)
720 len = (int) data[0];
721
722 if (urb->actual_length > 1) {
723 dbg("%s - urb->actual_length = %i", __func__,
724 urb->actual_length);
725 error = 1;
726 return;
727 }
728 /* if len > 0 call readbuf */
729
730 if (len > 0 && error == 0) {
731 dbg("%s - call read buf - len to read is %i ",
732 __func__, len);
733 status = iuu_read_buf(port, len);
734 return;
735 }
736 /* need to update status ? */
737 if (priv->poll > 99) {
738 status = iuu_status(port);
739 priv->poll = 0;
740 return;
741 }
742
743 /* reset waiting ? */
744
745 if (priv->reset == 1) {
746 status = iuu_reset(port, 0xC);
747 return;
748 }
749 /* Writebuf is waiting */
750 spin_lock_irqsave(&priv->lock, flags);
751 if (priv->writelen > 0) {
752 spin_unlock_irqrestore(&priv->lock, flags);
753 status = iuu_bulk_write(port);
754 return;
755 }
756 spin_unlock_irqrestore(&priv->lock, flags);
757 /* if nothing to write call again rxcmd */
758 dbg("%s - rxcmd recall", __func__);
759 iuu_led_activity_off(urb);
760 }
761
762 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
763 const u8 *buf, int count)
764 {
765 struct iuu_private *priv = usb_get_serial_port_data(port);
766 unsigned long flags;
767 dbg("%s - enter", __func__);
768
769 if (count > 256)
770 return -ENOMEM;
771
772 spin_lock_irqsave(&priv->lock, flags);
773 if (priv->writelen > 0) {
774 /* buffer already filled but not commited */
775 spin_unlock_irqrestore(&priv->lock, flags);
776 return 0;
777 }
778 /* fill the buffer */
779 memcpy(priv->writebuf, buf, count);
780 priv->writelen = count;
781 spin_unlock_irqrestore(&priv->lock, flags);
782
783 return count;
784 }
785
786 static void read_rxcmd_callback(struct urb *urb)
787 {
788 struct usb_serial_port *port = urb->context;
789 int result;
790 int status = urb->status;
791
792 dbg("%s - status = %d", __func__, status);
793
794 if (status) {
795 /* error stop all */
796 return;
797 }
798
799 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
800 usb_rcvbulkpipe(port->serial->dev,
801 port->bulk_in_endpointAddress),
802 port->read_urb->transfer_buffer, 256,
803 iuu_uart_read_callback, port);
804 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
805 dbg("%s - submit result = %d", __func__, result);
806 return;
807 }
808
809 static int iuu_uart_on(struct usb_serial_port *port)
810 {
811 int status;
812 u8 *buf;
813
814 buf = kmalloc(sizeof(u8) * 4, GFP_KERNEL);
815
816 if (!buf)
817 return -ENOMEM;
818
819 buf[0] = IUU_UART_ENABLE;
820 buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
821 buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
822 buf[3] = (u8) (0x0F0 & IUU_TWO_STOP_BITS) | (0x07 & IUU_PARITY_EVEN);
823
824 status = bulk_immediate(port, buf, 4);
825 if (status != IUU_OPERATION_OK) {
826 dbg("%s - uart_on error", __func__);
827 goto uart_enable_failed;
828 }
829 /* iuu_reset() the card after iuu_uart_on() */
830 status = iuu_uart_flush(port);
831 if (status != IUU_OPERATION_OK)
832 dbg("%s - uart_flush error", __func__);
833 uart_enable_failed:
834 kfree(buf);
835 return status;
836 }
837
838 /* Diables the IUU UART (a.k.a. the Phoenix voiderface) */
839 static int iuu_uart_off(struct usb_serial_port *port)
840 {
841 int status;
842 u8 *buf;
843 buf = kmalloc(1, GFP_KERNEL);
844 if (!buf)
845 return -ENOMEM;
846 buf[0] = IUU_UART_DISABLE;
847
848 status = bulk_immediate(port, buf, 1);
849 if (status != IUU_OPERATION_OK)
850 dbg("%s - uart_off error", __func__);
851
852 kfree(buf);
853 return status;
854 }
855
856 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud,
857 u32 *actual, u8 parity)
858 {
859 int status;
860 u8 *dataout;
861 u8 DataCount = 0;
862 u8 T1Frekvens = 0;
863 u8 T1reload = 0;
864 unsigned int T1FrekvensHZ = 0;
865
866 dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
867
868 if (!dataout)
869 return -ENOMEM;
870
871 if (baud < 1200 || baud > 230400) {
872 kfree(dataout);
873 return IUU_INVALID_PARAMETER;
874 }
875 if (baud > 977) {
876 T1Frekvens = 3;
877 T1FrekvensHZ = 500000;
878 }
879
880 if (baud > 3906) {
881 T1Frekvens = 2;
882 T1FrekvensHZ = 2000000;
883 }
884
885 if (baud > 11718) {
886 T1Frekvens = 1;
887 T1FrekvensHZ = 6000000;
888 }
889
890 if (baud > 46875) {
891 T1Frekvens = 0;
892 T1FrekvensHZ = 24000000;
893 }
894
895 T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
896
897 /* magic number here: ENTER_FIRMWARE_UPDATE; */
898 dataout[DataCount++] = IUU_UART_ESC;
899 /* magic number here: CHANGE_BAUD; */
900 dataout[DataCount++] = IUU_UART_CHANGE;
901 dataout[DataCount++] = T1Frekvens;
902 dataout[DataCount++] = T1reload;
903
904 *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
905
906 switch (parity & 0x0F) {
907 case IUU_PARITY_NONE:
908 dataout[DataCount++] = 0x00;
909 break;
910 case IUU_PARITY_EVEN:
911 dataout[DataCount++] = 0x01;
912 break;
913 case IUU_PARITY_ODD:
914 dataout[DataCount++] = 0x02;
915 break;
916 case IUU_PARITY_MARK:
917 dataout[DataCount++] = 0x03;
918 break;
919 case IUU_PARITY_SPACE:
920 dataout[DataCount++] = 0x04;
921 break;
922 default:
923 kfree(dataout);
924 return IUU_INVALID_PARAMETER;
925 break;
926 }
927
928 switch (parity & 0xF0) {
929 case IUU_ONE_STOP_BIT:
930 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
931 break;
932
933 case IUU_TWO_STOP_BITS:
934 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
935 break;
936 default:
937 kfree(dataout);
938 return IUU_INVALID_PARAMETER;
939 break;
940 }
941
942 status = bulk_immediate(port, dataout, DataCount);
943 if (status != IUU_OPERATION_OK)
944 dbg("%s - uart_off error", __func__);
945 kfree(dataout);
946 return status;
947 }
948
949 static int set_control_lines(struct usb_device *dev, u8 value)
950 {
951 return 0;
952 }
953
954 static void iuu_close(struct tty_struct *tty,
955 struct usb_serial_port *port, struct file *filp)
956 {
957 /* iuu_led (port,255,0,0,0); */
958 struct usb_serial *serial;
959 struct iuu_private *priv = usb_get_serial_port_data(port);
960 unsigned long flags;
961 unsigned int c_cflag;
962
963 serial = port->serial;
964 if (!serial)
965 return;
966
967 dbg("%s - port %d", __func__, port->number);
968
969 iuu_uart_off(port);
970 if (serial->dev) {
971 if (tty) {
972 c_cflag = tty->termios->c_cflag;
973 if (c_cflag & HUPCL) {
974 /* drop DTR and RTS */
975 priv = usb_get_serial_port_data(port);
976 spin_lock_irqsave(&priv->lock, flags);
977 priv->line_control = 0;
978 spin_unlock_irqrestore(&priv->lock, flags);
979 set_control_lines(port->serial->dev, 0);
980 }
981 }
982 /* free writebuf */
983 /* shutdown our urbs */
984 dbg("%s - shutting down urbs", __func__);
985 usb_kill_urb(port->write_urb);
986 usb_kill_urb(port->read_urb);
987 usb_kill_urb(port->interrupt_in_urb);
988 msleep(1000);
989 /* wait one second to free all buffers */
990 iuu_led(port, 0, 0, 0xF000, 0xFF);
991 msleep(1000);
992 usb_reset_device(port->serial->dev);
993 }
994 }
995
996 static int iuu_open(struct tty_struct *tty,
997 struct usb_serial_port *port, struct file *filp)
998 {
999 struct usb_serial *serial = port->serial;
1000 u8 *buf;
1001 int result;
1002 u32 actual;
1003 unsigned long flags;
1004 struct iuu_private *priv = usb_get_serial_port_data(port);
1005
1006 dbg("%s - port %d", __func__, port->number);
1007 usb_clear_halt(serial->dev, port->write_urb->pipe);
1008 usb_clear_halt(serial->dev, port->read_urb->pipe);
1009
1010 buf = kmalloc(10, GFP_KERNEL);
1011 if (buf == NULL)
1012 return -ENOMEM;
1013
1014 /* fixup the endpoint buffer size */
1015 kfree(port->bulk_out_buffer);
1016 port->bulk_out_buffer = kmalloc(512, GFP_KERNEL);
1017 port->bulk_out_size = 512;
1018 kfree(port->bulk_in_buffer);
1019 port->bulk_in_buffer = kmalloc(512, GFP_KERNEL);
1020 port->bulk_in_size = 512;
1021
1022 if (!port->bulk_out_buffer || !port->bulk_in_buffer) {
1023 kfree(port->bulk_out_buffer);
1024 kfree(port->bulk_in_buffer);
1025 kfree(buf);
1026 return -ENOMEM;
1027 }
1028
1029 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1030 usb_sndbulkpipe(port->serial->dev,
1031 port->bulk_out_endpointAddress),
1032 port->bulk_out_buffer, 512,
1033 NULL, NULL);
1034
1035
1036 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
1037 usb_rcvbulkpipe(port->serial->dev,
1038 port->bulk_in_endpointAddress),
1039 port->bulk_in_buffer, 512,
1040 NULL, NULL);
1041
1042 /* set the termios structure */
1043 spin_lock_irqsave(&priv->lock, flags);
1044 if (tty && !priv->termios_initialized) {
1045 *(tty->termios) = tty_std_termios;
1046 tty->termios->c_cflag = CLOCAL | CREAD | CS8 | B9600
1047 | TIOCM_CTS | CSTOPB | PARENB;
1048 tty->termios->c_ispeed = 9600;
1049 tty->termios->c_ospeed = 9600;
1050 tty->termios->c_lflag = 0;
1051 tty->termios->c_oflag = 0;
1052 tty->termios->c_iflag = 0;
1053 priv->termios_initialized = 1;
1054 priv->poll = 0;
1055 }
1056 spin_unlock_irqrestore(&priv->lock, flags);
1057
1058 /* initialize writebuf */
1059 #define FISH(a, b, c, d) do { \
1060 result = usb_control_msg(port->serial->dev, \
1061 usb_rcvctrlpipe(port->serial->dev, 0), \
1062 b, a, c, d, buf, 1, 1000); \
1063 dbg("0x%x:0x%x:0x%x:0x%x %d - %x", a, b, c, d, result, \
1064 buf[0]); } while (0);
1065
1066 #define SOUP(a, b, c, d) do { \
1067 result = usb_control_msg(port->serial->dev, \
1068 usb_sndctrlpipe(port->serial->dev, 0), \
1069 b, a, c, d, NULL, 0, 1000); \
1070 dbg("0x%x:0x%x:0x%x:0x%x %d", a, b, c, d, result); } while (0)
1071
1072 /* This is not UART related but IUU USB driver related or something */
1073 /* like that. Basically no IUU will accept any commands from the USB */
1074 /* host unless it has received the following message */
1075 /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
1076
1077 SOUP(0x03, 0x02, 0x02, 0x0);
1078 kfree(buf);
1079 iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
1080 iuu_uart_on(port);
1081 if (boost < 100)
1082 boost = 100;
1083 switch (clockmode) {
1084 case 2: /* 3.680 Mhz */
1085 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
1086 result =
1087 iuu_uart_baud(port, 9600 * boost / 100, &actual,
1088 IUU_PARITY_EVEN);
1089 break;
1090 case 3: /* 6.00 Mhz */
1091 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1092 result =
1093 iuu_uart_baud(port, 16457 * boost / 100, &actual,
1094 IUU_PARITY_EVEN);
1095 break;
1096 default: /* 3.579 Mhz */
1097 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1098 result =
1099 iuu_uart_baud(port, 9600 * boost / 100, &actual,
1100 IUU_PARITY_EVEN);
1101 }
1102
1103 /* set the cardin cardout signals */
1104 switch (cdmode) {
1105 case 0:
1106 iuu_cardin = 0;
1107 iuu_cardout = 0;
1108 break;
1109 case 1:
1110 iuu_cardin = TIOCM_CD;
1111 iuu_cardout = 0;
1112 break;
1113 case 2:
1114 iuu_cardin = 0;
1115 iuu_cardout = TIOCM_CD;
1116 break;
1117 case 3:
1118 iuu_cardin = TIOCM_DSR;
1119 iuu_cardout = 0;
1120 break;
1121 case 4:
1122 iuu_cardin = 0;
1123 iuu_cardout = TIOCM_DSR;
1124 break;
1125 case 5:
1126 iuu_cardin = TIOCM_CTS;
1127 iuu_cardout = 0;
1128 break;
1129 case 6:
1130 iuu_cardin = 0;
1131 iuu_cardout = TIOCM_CTS;
1132 break;
1133 case 7:
1134 iuu_cardin = TIOCM_RNG;
1135 iuu_cardout = 0;
1136 break;
1137 case 8:
1138 iuu_cardin = 0;
1139 iuu_cardout = TIOCM_RNG;
1140 }
1141
1142 iuu_uart_flush(port);
1143
1144 dbg("%s - initialization done", __func__);
1145
1146 memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1147 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1148 usb_sndbulkpipe(port->serial->dev,
1149 port->bulk_out_endpointAddress),
1150 port->write_urb->transfer_buffer, 1,
1151 read_rxcmd_callback, port);
1152 result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1153
1154 if (result) {
1155 dev_err(&port->dev, "%s - failed submitting read urb,"
1156 " error %d\n", __func__, result);
1157 iuu_close(tty, port, NULL);
1158 return -EPROTO;
1159 } else {
1160 dbg("%s - rxcmd OK", __func__);
1161 }
1162 return result;
1163 }
1164
1165 static struct usb_serial_driver iuu_device = {
1166 .driver = {
1167 .owner = THIS_MODULE,
1168 .name = "iuu_phoenix",
1169 },
1170 .id_table = id_table,
1171 .num_ports = 1,
1172 .open = iuu_open,
1173 .close = iuu_close,
1174 .write = iuu_uart_write,
1175 .read_bulk_callback = iuu_uart_read_callback,
1176 .tiocmget = iuu_tiocmget,
1177 .tiocmset = iuu_tiocmset,
1178 .attach = iuu_startup,
1179 .shutdown = iuu_shutdown,
1180 };
1181
1182 static int __init iuu_init(void)
1183 {
1184 int retval;
1185 retval = usb_serial_register(&iuu_device);
1186 if (retval)
1187 goto failed_usb_serial_register;
1188 retval = usb_register(&iuu_driver);
1189 if (retval)
1190 goto failed_usb_register;
1191 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1192 DRIVER_DESC "\n");
1193 return 0;
1194 failed_usb_register:
1195 usb_serial_deregister(&iuu_device);
1196 failed_usb_serial_register:
1197 return retval;
1198 }
1199
1200 static void __exit iuu_exit(void)
1201 {
1202 usb_deregister(&iuu_driver);
1203 usb_serial_deregister(&iuu_device);
1204 }
1205
1206 module_init(iuu_init);
1207 module_exit(iuu_exit);
1208
1209 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1210
1211 MODULE_DESCRIPTION(DRIVER_DESC);
1212 MODULE_LICENSE("GPL");
1213
1214 MODULE_VERSION(DRIVER_VERSION);
1215 module_param(debug, bool, S_IRUGO | S_IWUSR);
1216 MODULE_PARM_DESC(debug, "Debug enabled or not");
1217
1218 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1219 MODULE_PARM_DESC(xmas, "xmas color enabled or not");
1220
1221 module_param(boost, int, S_IRUGO | S_IWUSR);
1222 MODULE_PARM_DESC(boost, "overclock boost percent 100 to 500");
1223
1224 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1225 MODULE_PARM_DESC(clockmode, "1=3Mhz579,2=3Mhz680,3=6Mhz");
1226
1227 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1228 MODULE_PARM_DESC(cdmode, "Card detect mode 0=none, 1=CD, 2=!CD, 3=DSR, "
1229 "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING");
Linux kernel - Deliverables
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