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Merge tag 'usb-4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
[linux-2.6/btrfs-unstable.git] / drivers / usb / serial / iuu_phoenix.c
blob449e89db9ceaa1920accbfc373cf72bbddda81e8
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Infinity Unlimited USB Phoenix driver
4 *
5 * Copyright (C) 2010 James Courtier-Dutton (James@superbug.co.uk)
6
7 * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
8 *
9 * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos Borrás)
10 *
11 * And tested with help of WB Electronics
12 */
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/slab.h>
16 #include <linux/tty.h>
17 #include <linux/tty_driver.h>
18 #include <linux/tty_flip.h>
19 #include <linux/serial.h>
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/spinlock.h>
23 #include <linux/uaccess.h>
24 #include <linux/usb.h>
25 #include <linux/usb/serial.h>
26 #include "iuu_phoenix.h"
27 #include <linux/random.h>
28
29 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
30
31 static const struct usb_device_id id_table[] = {
32 {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
33 {} /* Terminating entry */
34 };
35 MODULE_DEVICE_TABLE(usb, id_table);
36
37 /* turbo parameter */
38 static int boost = 100;
39 static int clockmode = 1;
40 static int cdmode = 1;
41 static int iuu_cardin;
42 static int iuu_cardout;
43 static bool xmas;
44 static int vcc_default = 5;
45
46 static int iuu_create_sysfs_attrs(struct usb_serial_port *port);
47 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port);
48 static void read_rxcmd_callback(struct urb *urb);
49
50 struct iuu_private {
51 spinlock_t lock; /* store irq state */
52 u8 line_status;
53 int tiostatus; /* store IUART SIGNAL for tiocmget call */
54 u8 reset; /* if 1 reset is needed */
55 int poll; /* number of poll */
56 u8 *writebuf; /* buffer for writing to device */
57 int writelen; /* num of byte to write to device */
58 u8 *buf; /* used for initialize speed */
59 u8 len;
60 int vcc; /* vcc (either 3 or 5 V) */
61 u32 boost;
62 u32 clk;
63 };
64
65 static int iuu_port_probe(struct usb_serial_port *port)
66 {
67 struct iuu_private *priv;
68 int ret;
69
70 priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
71 if (!priv)
72 return -ENOMEM;
73
74 priv->buf = kzalloc(256, GFP_KERNEL);
75 if (!priv->buf) {
76 kfree(priv);
77 return -ENOMEM;
78 }
79
80 priv->writebuf = kzalloc(256, GFP_KERNEL);
81 if (!priv->writebuf) {
82 kfree(priv->buf);
83 kfree(priv);
84 return -ENOMEM;
85 }
86
87 priv->vcc = vcc_default;
88 spin_lock_init(&priv->lock);
89
90 usb_set_serial_port_data(port, priv);
91
92 ret = iuu_create_sysfs_attrs(port);
93 if (ret) {
94 kfree(priv->writebuf);
95 kfree(priv->buf);
96 kfree(priv);
97 return ret;
98 }
99
100 return 0;
101 }
102
103 static int iuu_port_remove(struct usb_serial_port *port)
104 {
105 struct iuu_private *priv = usb_get_serial_port_data(port);
106
107 iuu_remove_sysfs_attrs(port);
108 kfree(priv->writebuf);
109 kfree(priv->buf);
110 kfree(priv);
111
112 return 0;
113 }
114
115 static int iuu_tiocmset(struct tty_struct *tty,
116 unsigned int set, unsigned int clear)
117 {
118 struct usb_serial_port *port = tty->driver_data;
119 struct iuu_private *priv = usb_get_serial_port_data(port);
120 unsigned long flags;
121
122 /* FIXME: locking on tiomstatus */
123 dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
124 __func__, set, clear);
125
126 spin_lock_irqsave(&priv->lock, flags);
127
128 if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
129 dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
130 priv->reset = 1;
131 }
132 if (set & TIOCM_RTS)
133 priv->tiostatus = TIOCM_RTS;
134
135 spin_unlock_irqrestore(&priv->lock, flags);
136 return 0;
137 }
138
139 /* This is used to provide a carrier detect mechanism
140 * When a card is present, the response is 0x00
141 * When no card , the reader respond with TIOCM_CD
142 * This is known as CD autodetect mechanism
143 */
144 static int iuu_tiocmget(struct tty_struct *tty)
145 {
146 struct usb_serial_port *port = tty->driver_data;
147 struct iuu_private *priv = usb_get_serial_port_data(port);
148 unsigned long flags;
149 int rc;
150
151 spin_lock_irqsave(&priv->lock, flags);
152 rc = priv->tiostatus;
153 spin_unlock_irqrestore(&priv->lock, flags);
154
155 return rc;
156 }
157
158 static void iuu_rxcmd(struct urb *urb)
159 {
160 struct usb_serial_port *port = urb->context;
161 int result;
162 int status = urb->status;
163
164 if (status) {
165 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
166 /* error stop all */
167 return;
168 }
169
170
171 memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
172 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
173 usb_sndbulkpipe(port->serial->dev,
174 port->bulk_out_endpointAddress),
175 port->write_urb->transfer_buffer, 1,
176 read_rxcmd_callback, port);
177 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
178 }
179
180 static int iuu_reset(struct usb_serial_port *port, u8 wt)
181 {
182 struct iuu_private *priv = usb_get_serial_port_data(port);
183 int result;
184 char *buf_ptr = port->write_urb->transfer_buffer;
185
186 /* Prepare the reset sequence */
187
188 *buf_ptr++ = IUU_RST_SET;
189 *buf_ptr++ = IUU_DELAY_MS;
190 *buf_ptr++ = wt;
191 *buf_ptr = IUU_RST_CLEAR;
192
193 /* send the sequence */
194
195 usb_fill_bulk_urb(port->write_urb,
196 port->serial->dev,
197 usb_sndbulkpipe(port->serial->dev,
198 port->bulk_out_endpointAddress),
199 port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
200 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
201 priv->reset = 0;
202 return result;
203 }
204
205 /* Status Function
206 * Return value is
207 * 0x00 = no card
208 * 0x01 = smartcard
209 * 0x02 = sim card
210 */
211 static void iuu_update_status_callback(struct urb *urb)
212 {
213 struct usb_serial_port *port = urb->context;
214 struct iuu_private *priv = usb_get_serial_port_data(port);
215 u8 *st;
216 int status = urb->status;
217
218 if (status) {
219 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
220 /* error stop all */
221 return;
222 }
223
224 st = urb->transfer_buffer;
225 dev_dbg(&port->dev, "%s - enter\n", __func__);
226 if (urb->actual_length == 1) {
227 switch (st[0]) {
228 case 0x1:
229 priv->tiostatus = iuu_cardout;
230 break;
231 case 0x0:
232 priv->tiostatus = iuu_cardin;
233 break;
234 default:
235 priv->tiostatus = iuu_cardin;
236 }
237 }
238 iuu_rxcmd(urb);
239 }
240
241 static void iuu_status_callback(struct urb *urb)
242 {
243 struct usb_serial_port *port = urb->context;
244 int result;
245 int status = urb->status;
246
247 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
248 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
249 usb_rcvbulkpipe(port->serial->dev,
250 port->bulk_in_endpointAddress),
251 port->read_urb->transfer_buffer, 256,
252 iuu_update_status_callback, port);
253 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
254 }
255
256 static int iuu_status(struct usb_serial_port *port)
257 {
258 int result;
259
260 memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
261 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
262 usb_sndbulkpipe(port->serial->dev,
263 port->bulk_out_endpointAddress),
264 port->write_urb->transfer_buffer, 1,
265 iuu_status_callback, port);
266 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
267 return result;
268
269 }
270
271 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
272 {
273 int status;
274 struct usb_serial *serial = port->serial;
275 int actual = 0;
276
277 /* send the data out the bulk port */
278
279 status =
280 usb_bulk_msg(serial->dev,
281 usb_sndbulkpipe(serial->dev,
282 port->bulk_out_endpointAddress), buf,
283 count, &actual, 1000);
284
285 if (status != IUU_OPERATION_OK)
286 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
287 else
288 dev_dbg(&port->dev, "%s - write OK !\n", __func__);
289 return status;
290 }
291
292 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
293 {
294 int status;
295 struct usb_serial *serial = port->serial;
296 int actual = 0;
297
298 /* send the data out the bulk port */
299 status =
300 usb_bulk_msg(serial->dev,
301 usb_rcvbulkpipe(serial->dev,
302 port->bulk_in_endpointAddress), buf,
303 count, &actual, 1000);
304
305 if (status != IUU_OPERATION_OK)
306 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
307 else
308 dev_dbg(&port->dev, "%s - read OK !\n", __func__);
309 return status;
310 }
311
312 static int iuu_led(struct usb_serial_port *port, unsigned int R,
313 unsigned int G, unsigned int B, u8 f)
314 {
315 int status;
316 u8 *buf;
317 buf = kmalloc(8, GFP_KERNEL);
318 if (!buf)
319 return -ENOMEM;
320
321 buf[0] = IUU_SET_LED;
322 buf[1] = R & 0xFF;
323 buf[2] = (R >> 8) & 0xFF;
324 buf[3] = G & 0xFF;
325 buf[4] = (G >> 8) & 0xFF;
326 buf[5] = B & 0xFF;
327 buf[6] = (B >> 8) & 0xFF;
328 buf[7] = f;
329 status = bulk_immediate(port, buf, 8);
330 kfree(buf);
331 if (status != IUU_OPERATION_OK)
332 dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
333 else
334 dev_dbg(&port->dev, "%s - led OK !\n", __func__);
335 return IUU_OPERATION_OK;
336 }
337
338 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
339 u8 b2, u8 freq)
340 {
341 *buf++ = IUU_SET_LED;
342 *buf++ = r1;
343 *buf++ = r2;
344 *buf++ = g1;
345 *buf++ = g2;
346 *buf++ = b1;
347 *buf++ = b2;
348 *buf = freq;
349 }
350
351 static void iuu_led_activity_on(struct urb *urb)
352 {
353 struct usb_serial_port *port = urb->context;
354 int result;
355 char *buf_ptr = port->write_urb->transfer_buffer;
356 *buf_ptr++ = IUU_SET_LED;
357 if (xmas) {
358 get_random_bytes(buf_ptr, 6);
359 *(buf_ptr+7) = 1;
360 } else {
361 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
362 }
363
364 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
365 usb_sndbulkpipe(port->serial->dev,
366 port->bulk_out_endpointAddress),
367 port->write_urb->transfer_buffer, 8 ,
368 iuu_rxcmd, port);
369 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
370 }
371
372 static void iuu_led_activity_off(struct urb *urb)
373 {
374 struct usb_serial_port *port = urb->context;
375 int result;
376 char *buf_ptr = port->write_urb->transfer_buffer;
377 if (xmas) {
378 iuu_rxcmd(urb);
379 return;
380 } else {
381 *buf_ptr++ = IUU_SET_LED;
382 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
383 }
384 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
385 usb_sndbulkpipe(port->serial->dev,
386 port->bulk_out_endpointAddress),
387 port->write_urb->transfer_buffer, 8 ,
388 iuu_rxcmd, port);
389 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
390 }
391
392
393
394 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
395 {
396 int status;
397 struct iuu_private *priv = usb_get_serial_port_data(port);
398 int Count = 0;
399 u8 FrqGenAdr = 0x69;
400 u8 DIV = 0; /* 8bit */
401 u8 XDRV = 0; /* 8bit */
402 u8 PUMP = 0; /* 3bit */
403 u8 PBmsb = 0; /* 2bit */
404 u8 PBlsb = 0; /* 8bit */
405 u8 PO = 0; /* 1bit */
406 u8 Q = 0; /* 7bit */
407 /* 24bit = 3bytes */
408 unsigned int P = 0;
409 unsigned int P2 = 0;
410 int frq = (int)dwFrq;
411
412 if (frq == 0) {
413 priv->buf[Count++] = IUU_UART_WRITE_I2C;
414 priv->buf[Count++] = FrqGenAdr << 1;
415 priv->buf[Count++] = 0x09;
416 priv->buf[Count++] = 0x00;
417
418 status = bulk_immediate(port, (u8 *) priv->buf, Count);
419 if (status != 0) {
420 dev_dbg(&port->dev, "%s - write error\n", __func__);
421 return status;
422 }
423 } else if (frq == 3579000) {
424 DIV = 100;
425 P = 1193;
426 Q = 40;
427 XDRV = 0;
428 } else if (frq == 3680000) {
429 DIV = 105;
430 P = 161;
431 Q = 5;
432 XDRV = 0;
433 } else if (frq == 6000000) {
434 DIV = 66;
435 P = 66;
436 Q = 2;
437 XDRV = 0x28;
438 } else {
439 unsigned int result = 0;
440 unsigned int tmp = 0;
441 unsigned int check;
442 unsigned int check2;
443 char found = 0x00;
444 unsigned int lQ = 2;
445 unsigned int lP = 2055;
446 unsigned int lDiv = 4;
447
448 for (lQ = 2; lQ <= 47 && !found; lQ++)
449 for (lP = 2055; lP >= 8 && !found; lP--)
450 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
451 tmp = (12000000 / lDiv) * (lP / lQ);
452 if (abs((int)(tmp - frq)) <
453 abs((int)(frq - result))) {
454 check2 = (12000000 / lQ);
455 if (check2 < 250000)
456 continue;
457 check = (12000000 / lQ) * lP;
458 if (check > 400000000)
459 continue;
460 if (check < 100000000)
461 continue;
462 if (lDiv < 4 || lDiv > 127)
463 continue;
464 result = tmp;
465 P = lP;
466 DIV = lDiv;
467 Q = lQ;
468 if (result == frq)
469 found = 0x01;
470 }
471 }
472 }
473 P2 = ((P - PO) / 2) - 4;
474 PUMP = 0x04;
475 PBmsb = (P2 >> 8 & 0x03);
476 PBlsb = P2 & 0xFF;
477 PO = (P >> 10) & 0x01;
478 Q = Q - 2;
479
480 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
481 priv->buf[Count++] = FrqGenAdr << 1;
482 priv->buf[Count++] = 0x09;
483 priv->buf[Count++] = 0x20; /* Adr = 0x09 */
484 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
485 priv->buf[Count++] = FrqGenAdr << 1;
486 priv->buf[Count++] = 0x0C;
487 priv->buf[Count++] = DIV; /* Adr = 0x0C */
488 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
489 priv->buf[Count++] = FrqGenAdr << 1;
490 priv->buf[Count++] = 0x12;
491 priv->buf[Count++] = XDRV; /* Adr = 0x12 */
492 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
493 priv->buf[Count++] = FrqGenAdr << 1;
494 priv->buf[Count++] = 0x13;
495 priv->buf[Count++] = 0x6B; /* Adr = 0x13 */
496 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
497 priv->buf[Count++] = FrqGenAdr << 1;
498 priv->buf[Count++] = 0x40;
499 priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
500 (PBmsb & 0x03); /* Adr = 0x40 */
501 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
502 priv->buf[Count++] = FrqGenAdr << 1;
503 priv->buf[Count++] = 0x41;
504 priv->buf[Count++] = PBlsb; /* Adr = 0x41 */
505 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
506 priv->buf[Count++] = FrqGenAdr << 1;
507 priv->buf[Count++] = 0x42;
508 priv->buf[Count++] = Q | (((PO & 0x01) << 7)); /* Adr = 0x42 */
509 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
510 priv->buf[Count++] = FrqGenAdr << 1;
511 priv->buf[Count++] = 0x44;
512 priv->buf[Count++] = (char)0xFF; /* Adr = 0x44 */
513 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
514 priv->buf[Count++] = FrqGenAdr << 1;
515 priv->buf[Count++] = 0x45;
516 priv->buf[Count++] = (char)0xFE; /* Adr = 0x45 */
517 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
518 priv->buf[Count++] = FrqGenAdr << 1;
519 priv->buf[Count++] = 0x46;
520 priv->buf[Count++] = 0x7F; /* Adr = 0x46 */
521 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
522 priv->buf[Count++] = FrqGenAdr << 1;
523 priv->buf[Count++] = 0x47;
524 priv->buf[Count++] = (char)0x84; /* Adr = 0x47 */
525
526 status = bulk_immediate(port, (u8 *) priv->buf, Count);
527 if (status != IUU_OPERATION_OK)
528 dev_dbg(&port->dev, "%s - write error\n", __func__);
529 return status;
530 }
531
532 static int iuu_uart_flush(struct usb_serial_port *port)
533 {
534 struct device *dev = &port->dev;
535 int i;
536 int status;
537 u8 rxcmd = IUU_UART_RX;
538 struct iuu_private *priv = usb_get_serial_port_data(port);
539
540 if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
541 return -EIO;
542
543 for (i = 0; i < 2; i++) {
544 status = bulk_immediate(port, &rxcmd, 1);
545 if (status != IUU_OPERATION_OK) {
546 dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
547 return status;
548 }
549
550 status = read_immediate(port, &priv->len, 1);
551 if (status != IUU_OPERATION_OK) {
552 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
553 return status;
554 }
555
556 if (priv->len > 0) {
557 dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
558 status = read_immediate(port, priv->buf, priv->len);
559 if (status != IUU_OPERATION_OK) {
560 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
561 return status;
562 }
563 }
564 }
565 dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
566 iuu_led(port, 0, 0xF000, 0, 0xFF);
567 return status;
568 }
569
570 static void read_buf_callback(struct urb *urb)
571 {
572 struct usb_serial_port *port = urb->context;
573 unsigned char *data = urb->transfer_buffer;
574 int status = urb->status;
575
576 if (status) {
577 if (status == -EPROTO) {
578 /* reschedule needed */
579 }
580 return;
581 }
582
583 dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
584
585 if (urb->actual_length) {
586 tty_insert_flip_string(&port->port, data, urb->actual_length);
587 tty_flip_buffer_push(&port->port);
588 }
589 iuu_led_activity_on(urb);
590 }
591
592 static int iuu_bulk_write(struct usb_serial_port *port)
593 {
594 struct iuu_private *priv = usb_get_serial_port_data(port);
595 unsigned long flags;
596 int result;
597 int buf_len;
598 char *buf_ptr = port->write_urb->transfer_buffer;
599
600 spin_lock_irqsave(&priv->lock, flags);
601 *buf_ptr++ = IUU_UART_ESC;
602 *buf_ptr++ = IUU_UART_TX;
603 *buf_ptr++ = priv->writelen;
604
605 memcpy(buf_ptr, priv->writebuf, priv->writelen);
606 buf_len = priv->writelen;
607 priv->writelen = 0;
608 spin_unlock_irqrestore(&priv->lock, flags);
609 dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
610 buf_len, buf_len, buf_ptr);
611 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
612 usb_sndbulkpipe(port->serial->dev,
613 port->bulk_out_endpointAddress),
614 port->write_urb->transfer_buffer, buf_len + 3,
615 iuu_rxcmd, port);
616 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
617 usb_serial_port_softint(port);
618 return result;
619 }
620
621 static int iuu_read_buf(struct usb_serial_port *port, int len)
622 {
623 int result;
624
625 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
626 usb_rcvbulkpipe(port->serial->dev,
627 port->bulk_in_endpointAddress),
628 port->read_urb->transfer_buffer, len,
629 read_buf_callback, port);
630 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
631 return result;
632 }
633
634 static void iuu_uart_read_callback(struct urb *urb)
635 {
636 struct usb_serial_port *port = urb->context;
637 struct iuu_private *priv = usb_get_serial_port_data(port);
638 unsigned long flags;
639 int status = urb->status;
640 int error = 0;
641 int len = 0;
642 unsigned char *data = urb->transfer_buffer;
643 priv->poll++;
644
645 if (status) {
646 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
647 /* error stop all */
648 return;
649 }
650
651 if (urb->actual_length == 1)
652 len = (int) data[0];
653
654 if (urb->actual_length > 1) {
655 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
656 urb->actual_length);
657 error = 1;
658 return;
659 }
660 /* if len > 0 call readbuf */
661
662 if (len > 0 && error == 0) {
663 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
664 __func__, len);
665 status = iuu_read_buf(port, len);
666 return;
667 }
668 /* need to update status ? */
669 if (priv->poll > 99) {
670 status = iuu_status(port);
671 priv->poll = 0;
672 return;
673 }
674
675 /* reset waiting ? */
676
677 if (priv->reset == 1) {
678 status = iuu_reset(port, 0xC);
679 return;
680 }
681 /* Writebuf is waiting */
682 spin_lock_irqsave(&priv->lock, flags);
683 if (priv->writelen > 0) {
684 spin_unlock_irqrestore(&priv->lock, flags);
685 status = iuu_bulk_write(port);
686 return;
687 }
688 spin_unlock_irqrestore(&priv->lock, flags);
689 /* if nothing to write call again rxcmd */
690 dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
691 iuu_led_activity_off(urb);
692 }
693
694 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
695 const u8 *buf, int count)
696 {
697 struct iuu_private *priv = usb_get_serial_port_data(port);
698 unsigned long flags;
699
700 if (count > 256)
701 return -ENOMEM;
702
703 spin_lock_irqsave(&priv->lock, flags);
704
705 /* fill the buffer */
706 memcpy(priv->writebuf + priv->writelen, buf, count);
707 priv->writelen += count;
708 spin_unlock_irqrestore(&priv->lock, flags);
709
710 return count;
711 }
712
713 static void read_rxcmd_callback(struct urb *urb)
714 {
715 struct usb_serial_port *port = urb->context;
716 int result;
717 int status = urb->status;
718
719 if (status) {
720 /* error stop all */
721 return;
722 }
723
724 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
725 usb_rcvbulkpipe(port->serial->dev,
726 port->bulk_in_endpointAddress),
727 port->read_urb->transfer_buffer, 256,
728 iuu_uart_read_callback, port);
729 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
730 dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
731 }
732
733 static int iuu_uart_on(struct usb_serial_port *port)
734 {
735 int status;
736 u8 *buf;
737
738 buf = kmalloc(4, GFP_KERNEL);
739
740 if (!buf)
741 return -ENOMEM;
742
743 buf[0] = IUU_UART_ENABLE;
744 buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
745 buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
746 buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
747
748 status = bulk_immediate(port, buf, 4);
749 if (status != IUU_OPERATION_OK) {
750 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
751 goto uart_enable_failed;
752 }
753 /* iuu_reset() the card after iuu_uart_on() */
754 status = iuu_uart_flush(port);
755 if (status != IUU_OPERATION_OK)
756 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
757 uart_enable_failed:
758 kfree(buf);
759 return status;
760 }
761
762 /* Disables the IUU UART (a.k.a. the Phoenix voiderface) */
763 static int iuu_uart_off(struct usb_serial_port *port)
764 {
765 int status;
766 u8 *buf;
767 buf = kmalloc(1, GFP_KERNEL);
768 if (!buf)
769 return -ENOMEM;
770 buf[0] = IUU_UART_DISABLE;
771
772 status = bulk_immediate(port, buf, 1);
773 if (status != IUU_OPERATION_OK)
774 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
775
776 kfree(buf);
777 return status;
778 }
779
780 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
781 u32 *actual, u8 parity)
782 {
783 int status;
784 u32 baud;
785 u8 *dataout;
786 u8 DataCount = 0;
787 u8 T1Frekvens = 0;
788 u8 T1reload = 0;
789 unsigned int T1FrekvensHZ = 0;
790
791 dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
792 dataout = kmalloc(5, GFP_KERNEL);
793
794 if (!dataout)
795 return -ENOMEM;
796 /*baud = (((priv->clk / 35) * baud_base) / 100000); */
797 baud = baud_base;
798
799 if (baud < 1200 || baud > 230400) {
800 kfree(dataout);
801 return IUU_INVALID_PARAMETER;
802 }
803 if (baud > 977) {
804 T1Frekvens = 3;
805 T1FrekvensHZ = 500000;
806 }
807
808 if (baud > 3906) {
809 T1Frekvens = 2;
810 T1FrekvensHZ = 2000000;
811 }
812
813 if (baud > 11718) {
814 T1Frekvens = 1;
815 T1FrekvensHZ = 6000000;
816 }
817
818 if (baud > 46875) {
819 T1Frekvens = 0;
820 T1FrekvensHZ = 24000000;
821 }
822
823 T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
824
825 /* magic number here: ENTER_FIRMWARE_UPDATE; */
826 dataout[DataCount++] = IUU_UART_ESC;
827 /* magic number here: CHANGE_BAUD; */
828 dataout[DataCount++] = IUU_UART_CHANGE;
829 dataout[DataCount++] = T1Frekvens;
830 dataout[DataCount++] = T1reload;
831
832 *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
833
834 switch (parity & 0x0F) {
835 case IUU_PARITY_NONE:
836 dataout[DataCount++] = 0x00;
837 break;
838 case IUU_PARITY_EVEN:
839 dataout[DataCount++] = 0x01;
840 break;
841 case IUU_PARITY_ODD:
842 dataout[DataCount++] = 0x02;
843 break;
844 case IUU_PARITY_MARK:
845 dataout[DataCount++] = 0x03;
846 break;
847 case IUU_PARITY_SPACE:
848 dataout[DataCount++] = 0x04;
849 break;
850 default:
851 kfree(dataout);
852 return IUU_INVALID_PARAMETER;
853 break;
854 }
855
856 switch (parity & 0xF0) {
857 case IUU_ONE_STOP_BIT:
858 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
859 break;
860
861 case IUU_TWO_STOP_BITS:
862 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
863 break;
864 default:
865 kfree(dataout);
866 return IUU_INVALID_PARAMETER;
867 break;
868 }
869
870 status = bulk_immediate(port, dataout, DataCount);
871 if (status != IUU_OPERATION_OK)
872 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
873 kfree(dataout);
874 return status;
875 }
876
877 static void iuu_set_termios(struct tty_struct *tty,
878 struct usb_serial_port *port, struct ktermios *old_termios)
879 {
880 const u32 supported_mask = CMSPAR|PARENB|PARODD;
881 struct iuu_private *priv = usb_get_serial_port_data(port);
882 unsigned int cflag = tty->termios.c_cflag;
883 int status;
884 u32 actual;
885 u32 parity;
886 int csize = CS7;
887 int baud;
888 u32 newval = cflag & supported_mask;
889
890 /* Just use the ospeed. ispeed should be the same. */
891 baud = tty->termios.c_ospeed;
892
893 dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
894
895 /* compute the parity parameter */
896 parity = 0;
897 if (cflag & CMSPAR) { /* Using mark space */
898 if (cflag & PARODD)
899 parity |= IUU_PARITY_SPACE;
900 else
901 parity |= IUU_PARITY_MARK;
902 } else if (!(cflag & PARENB)) {
903 parity |= IUU_PARITY_NONE;
904 csize = CS8;
905 } else if (cflag & PARODD)
906 parity |= IUU_PARITY_ODD;
907 else
908 parity |= IUU_PARITY_EVEN;
909
910 parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
911
912 /* set it */
913 status = iuu_uart_baud(port,
914 baud * priv->boost / 100,
915 &actual, parity);
916
917 /* set the termios value to the real one, so the user now what has
918 * changed. We support few fields so its easies to copy the old hw
919 * settings back over and then adjust them
920 */
921 if (old_termios)
922 tty_termios_copy_hw(&tty->termios, old_termios);
923 if (status != 0) /* Set failed - return old bits */
924 return;
925 /* Re-encode speed, parity and csize */
926 tty_encode_baud_rate(tty, baud, baud);
927 tty->termios.c_cflag &= ~(supported_mask|CSIZE);
928 tty->termios.c_cflag |= newval | csize;
929 }
930
931 static void iuu_close(struct usb_serial_port *port)
932 {
933 /* iuu_led (port,255,0,0,0); */
934
935 iuu_uart_off(port);
936
937 usb_kill_urb(port->write_urb);
938 usb_kill_urb(port->read_urb);
939
940 iuu_led(port, 0, 0, 0xF000, 0xFF);
941 }
942
943 static void iuu_init_termios(struct tty_struct *tty)
944 {
945 tty->termios = tty_std_termios;
946 tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600
947 | TIOCM_CTS | CSTOPB | PARENB;
948 tty->termios.c_ispeed = 9600;
949 tty->termios.c_ospeed = 9600;
950 tty->termios.c_lflag = 0;
951 tty->termios.c_oflag = 0;
952 tty->termios.c_iflag = 0;
953 }
954
955 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
956 {
957 struct usb_serial *serial = port->serial;
958 struct device *dev = &port->dev;
959 int result;
960 int baud;
961 u32 actual;
962 struct iuu_private *priv = usb_get_serial_port_data(port);
963
964 baud = tty->termios.c_ospeed;
965
966 dev_dbg(dev, "%s - baud %d\n", __func__, baud);
967 usb_clear_halt(serial->dev, port->write_urb->pipe);
968 usb_clear_halt(serial->dev, port->read_urb->pipe);
969
970 priv->poll = 0;
971
972 #define SOUP(a, b, c, d) do { \
973 result = usb_control_msg(port->serial->dev, \
974 usb_sndctrlpipe(port->serial->dev, 0), \
975 b, a, c, d, NULL, 0, 1000); \
976 dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x %d\n", a, b, c, d, result); } while (0)
977
978 /* This is not UART related but IUU USB driver related or something */
979 /* like that. Basically no IUU will accept any commands from the USB */
980 /* host unless it has received the following message */
981 /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
982
983 SOUP(0x03, 0x02, 0x02, 0x0);
984
985 iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
986 iuu_uart_on(port);
987 if (boost < 100)
988 boost = 100;
989 priv->boost = boost;
990 switch (clockmode) {
991 case 2: /* 3.680 Mhz */
992 priv->clk = IUU_CLK_3680000;
993 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
994 result =
995 iuu_uart_baud(port, baud * boost / 100, &actual,
996 IUU_PARITY_EVEN);
997 break;
998 case 3: /* 6.00 Mhz */
999 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1000 priv->clk = IUU_CLK_6000000;
1001 /* Ratio of 6000000 to 3500000 for baud 9600 */
1002 result =
1003 iuu_uart_baud(port, 16457 * boost / 100, &actual,
1004 IUU_PARITY_EVEN);
1005 break;
1006 default: /* 3.579 Mhz */
1007 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1008 priv->clk = IUU_CLK_3579000;
1009 result =
1010 iuu_uart_baud(port, baud * boost / 100, &actual,
1011 IUU_PARITY_EVEN);
1012 }
1013
1014 /* set the cardin cardout signals */
1015 switch (cdmode) {
1016 case 0:
1017 iuu_cardin = 0;
1018 iuu_cardout = 0;
1019 break;
1020 case 1:
1021 iuu_cardin = TIOCM_CD;
1022 iuu_cardout = 0;
1023 break;
1024 case 2:
1025 iuu_cardin = 0;
1026 iuu_cardout = TIOCM_CD;
1027 break;
1028 case 3:
1029 iuu_cardin = TIOCM_DSR;
1030 iuu_cardout = 0;
1031 break;
1032 case 4:
1033 iuu_cardin = 0;
1034 iuu_cardout = TIOCM_DSR;
1035 break;
1036 case 5:
1037 iuu_cardin = TIOCM_CTS;
1038 iuu_cardout = 0;
1039 break;
1040 case 6:
1041 iuu_cardin = 0;
1042 iuu_cardout = TIOCM_CTS;
1043 break;
1044 case 7:
1045 iuu_cardin = TIOCM_RNG;
1046 iuu_cardout = 0;
1047 break;
1048 case 8:
1049 iuu_cardin = 0;
1050 iuu_cardout = TIOCM_RNG;
1051 }
1052
1053 iuu_uart_flush(port);
1054
1055 dev_dbg(dev, "%s - initialization done\n", __func__);
1056
1057 memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1058 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1059 usb_sndbulkpipe(port->serial->dev,
1060 port->bulk_out_endpointAddress),
1061 port->write_urb->transfer_buffer, 1,
1062 read_rxcmd_callback, port);
1063 result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1064 if (result) {
1065 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1066 iuu_close(port);
1067 } else {
1068 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1069 }
1070
1071 return result;
1072 }
1073
1074 /* how to change VCC */
1075 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1076 {
1077 int status;
1078 u8 *buf;
1079
1080 buf = kmalloc(5, GFP_KERNEL);
1081 if (!buf)
1082 return -ENOMEM;
1083
1084 buf[0] = IUU_SET_VCC;
1085 buf[1] = vcc & 0xFF;
1086 buf[2] = (vcc >> 8) & 0xFF;
1087 buf[3] = (vcc >> 16) & 0xFF;
1088 buf[4] = (vcc >> 24) & 0xFF;
1089
1090 status = bulk_immediate(port, buf, 5);
1091 kfree(buf);
1092
1093 if (status != IUU_OPERATION_OK)
1094 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1095 else
1096 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1097
1098 return status;
1099 }
1100
1101 /*
1102 * Sysfs Attributes
1103 */
1104
1105 static ssize_t vcc_mode_show(struct device *dev,
1106 struct device_attribute *attr, char *buf)
1107 {
1108 struct usb_serial_port *port = to_usb_serial_port(dev);
1109 struct iuu_private *priv = usb_get_serial_port_data(port);
1110
1111 return sprintf(buf, "%d\n", priv->vcc);
1112 }
1113
1114 static ssize_t vcc_mode_store(struct device *dev,
1115 struct device_attribute *attr, const char *buf, size_t count)
1116 {
1117 struct usb_serial_port *port = to_usb_serial_port(dev);
1118 struct iuu_private *priv = usb_get_serial_port_data(port);
1119 unsigned long v;
1120
1121 if (kstrtoul(buf, 10, &v)) {
1122 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1123 __func__, buf);
1124 goto fail_store_vcc_mode;
1125 }
1126
1127 dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1128
1129 if ((v != 3) && (v != 5)) {
1130 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1131 } else {
1132 iuu_vcc_set(port, v);
1133 priv->vcc = v;
1134 }
1135 fail_store_vcc_mode:
1136 return count;
1137 }
1138 static DEVICE_ATTR_RW(vcc_mode);
1139
1140 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1141 {
1142 return device_create_file(&port->dev, &dev_attr_vcc_mode);
1143 }
1144
1145 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1146 {
1147 device_remove_file(&port->dev, &dev_attr_vcc_mode);
1148 return 0;
1149 }
1150
1151 /*
1152 * End Sysfs Attributes
1153 */
1154
1155 static struct usb_serial_driver iuu_device = {
1156 .driver = {
1157 .owner = THIS_MODULE,
1158 .name = "iuu_phoenix",
1159 },
1160 .id_table = id_table,
1161 .num_ports = 1,
1162 .num_bulk_in = 1,
1163 .num_bulk_out = 1,
1164 .bulk_in_size = 512,
1165 .bulk_out_size = 512,
1166 .open = iuu_open,
1167 .close = iuu_close,
1168 .write = iuu_uart_write,
1169 .read_bulk_callback = iuu_uart_read_callback,
1170 .tiocmget = iuu_tiocmget,
1171 .tiocmset = iuu_tiocmset,
1172 .set_termios = iuu_set_termios,
1173 .init_termios = iuu_init_termios,
1174 .port_probe = iuu_port_probe,
1175 .port_remove = iuu_port_remove,
1176 };
1177
1178 static struct usb_serial_driver * const serial_drivers[] = {
1179 &iuu_device, NULL
1180 };
1181
1182 module_usb_serial_driver(serial_drivers, id_table);
1183
1184 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1185
1186 MODULE_DESCRIPTION(DRIVER_DESC);
1187 MODULE_LICENSE("GPL");
1188
1189 module_param(xmas, bool, S_IRUGO | S_IWUSR);
1190 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1191
1192 module_param(boost, int, S_IRUGO | S_IWUSR);
1193 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1194
1195 module_param(clockmode, int, S_IRUGO | S_IWUSR);
1196 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1197 "3=6 Mhz)");
1198
1199 module_param(cdmode, int, S_IRUGO | S_IWUSR);
1200 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1201 "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1202
1203 module_param(vcc_default, int, S_IRUGO | S_IWUSR);
1204 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1205 "for 5V). Default to 5.");
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