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
iuu_port_probe(struct usb_serial_port * port)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
iuu_port_remove(struct usb_serial_port * port)103 static void 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
iuu_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)113 static int iuu_tiocmset(struct tty_struct *tty,
114 unsigned int set, unsigned int clear)
115 {
116 struct usb_serial_port *port = tty->driver_data;
117 struct iuu_private *priv = usb_get_serial_port_data(port);
118 unsigned long flags;
119
120 /* FIXME: locking on tiomstatus */
121 dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
122 __func__, set, clear);
123
124 spin_lock_irqsave(&priv->lock, flags);
125
126 if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
127 dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
128 priv->reset = 1;
129 }
130 if (set & TIOCM_RTS)
131 priv->tiostatus = TIOCM_RTS;
132
133 spin_unlock_irqrestore(&priv->lock, flags);
134 return 0;
135 }
136
137 /* This is used to provide a carrier detect mechanism
138 * When a card is present, the response is 0x00
139 * When no card , the reader respond with TIOCM_CD
140 * This is known as CD autodetect mechanism
141 */
iuu_tiocmget(struct tty_struct * tty)142 static int iuu_tiocmget(struct tty_struct *tty)
143 {
144 struct usb_serial_port *port = tty->driver_data;
145 struct iuu_private *priv = usb_get_serial_port_data(port);
146 unsigned long flags;
147 int rc;
148
149 spin_lock_irqsave(&priv->lock, flags);
150 rc = priv->tiostatus;
151 spin_unlock_irqrestore(&priv->lock, flags);
152
153 return rc;
154 }
155
iuu_rxcmd(struct urb * urb)156 static void iuu_rxcmd(struct urb *urb)
157 {
158 struct usb_serial_port *port = urb->context;
159 int status = urb->status;
160
161 if (status) {
162 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
163 /* error stop all */
164 return;
165 }
166
167
168 memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
169 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
170 usb_sndbulkpipe(port->serial->dev,
171 port->bulk_out_endpointAddress),
172 port->write_urb->transfer_buffer, 1,
173 read_rxcmd_callback, port);
174 usb_submit_urb(port->write_urb, GFP_ATOMIC);
175 }
176
iuu_reset(struct usb_serial_port * port,u8 wt)177 static int iuu_reset(struct usb_serial_port *port, u8 wt)
178 {
179 struct iuu_private *priv = usb_get_serial_port_data(port);
180 int result;
181 char *buf_ptr = port->write_urb->transfer_buffer;
182
183 /* Prepare the reset sequence */
184
185 *buf_ptr++ = IUU_RST_SET;
186 *buf_ptr++ = IUU_DELAY_MS;
187 *buf_ptr++ = wt;
188 *buf_ptr = IUU_RST_CLEAR;
189
190 /* send the sequence */
191
192 usb_fill_bulk_urb(port->write_urb,
193 port->serial->dev,
194 usb_sndbulkpipe(port->serial->dev,
195 port->bulk_out_endpointAddress),
196 port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
197 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
198 priv->reset = 0;
199 return result;
200 }
201
202 /* Status Function
203 * Return value is
204 * 0x00 = no card
205 * 0x01 = smartcard
206 * 0x02 = sim card
207 */
iuu_update_status_callback(struct urb * urb)208 static void iuu_update_status_callback(struct urb *urb)
209 {
210 struct usb_serial_port *port = urb->context;
211 struct iuu_private *priv = usb_get_serial_port_data(port);
212 u8 *st;
213 int status = urb->status;
214
215 if (status) {
216 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
217 /* error stop all */
218 return;
219 }
220
221 st = urb->transfer_buffer;
222 dev_dbg(&port->dev, "%s - enter\n", __func__);
223 if (urb->actual_length == 1) {
224 switch (st[0]) {
225 case 0x1:
226 priv->tiostatus = iuu_cardout;
227 break;
228 case 0x0:
229 priv->tiostatus = iuu_cardin;
230 break;
231 default:
232 priv->tiostatus = iuu_cardin;
233 }
234 }
235 iuu_rxcmd(urb);
236 }
237
iuu_status_callback(struct urb * urb)238 static void iuu_status_callback(struct urb *urb)
239 {
240 struct usb_serial_port *port = urb->context;
241 int status = urb->status;
242
243 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
244 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
245 usb_rcvbulkpipe(port->serial->dev,
246 port->bulk_in_endpointAddress),
247 port->read_urb->transfer_buffer, 256,
248 iuu_update_status_callback, port);
249 usb_submit_urb(port->read_urb, GFP_ATOMIC);
250 }
251
iuu_status(struct usb_serial_port * port)252 static int iuu_status(struct usb_serial_port *port)
253 {
254 int result;
255
256 memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
257 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
258 usb_sndbulkpipe(port->serial->dev,
259 port->bulk_out_endpointAddress),
260 port->write_urb->transfer_buffer, 1,
261 iuu_status_callback, port);
262 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
263 return result;
264
265 }
266
bulk_immediate(struct usb_serial_port * port,u8 * buf,u8 count)267 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
268 {
269 int status;
270 struct usb_serial *serial = port->serial;
271 int actual = 0;
272
273 /* send the data out the bulk port */
274
275 status =
276 usb_bulk_msg(serial->dev,
277 usb_sndbulkpipe(serial->dev,
278 port->bulk_out_endpointAddress), buf,
279 count, &actual, 1000);
280
281 if (status != IUU_OPERATION_OK)
282 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
283 else
284 dev_dbg(&port->dev, "%s - write OK !\n", __func__);
285 return status;
286 }
287
read_immediate(struct usb_serial_port * port,u8 * buf,u8 count)288 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
289 {
290 int status;
291 struct usb_serial *serial = port->serial;
292 int actual = 0;
293
294 /* send the data out the bulk port */
295 status =
296 usb_bulk_msg(serial->dev,
297 usb_rcvbulkpipe(serial->dev,
298 port->bulk_in_endpointAddress), buf,
299 count, &actual, 1000);
300
301 if (status != IUU_OPERATION_OK)
302 dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
303 else
304 dev_dbg(&port->dev, "%s - read OK !\n", __func__);
305 return status;
306 }
307
iuu_led(struct usb_serial_port * port,unsigned int R,unsigned int G,unsigned int B,u8 f)308 static int iuu_led(struct usb_serial_port *port, unsigned int R,
309 unsigned int G, unsigned int B, u8 f)
310 {
311 int status;
312 u8 *buf;
313 buf = kmalloc(8, GFP_KERNEL);
314 if (!buf)
315 return -ENOMEM;
316
317 buf[0] = IUU_SET_LED;
318 buf[1] = R & 0xFF;
319 buf[2] = (R >> 8) & 0xFF;
320 buf[3] = G & 0xFF;
321 buf[4] = (G >> 8) & 0xFF;
322 buf[5] = B & 0xFF;
323 buf[6] = (B >> 8) & 0xFF;
324 buf[7] = f;
325 status = bulk_immediate(port, buf, 8);
326 kfree(buf);
327 if (status != IUU_OPERATION_OK)
328 dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
329 else
330 dev_dbg(&port->dev, "%s - led OK !\n", __func__);
331 return IUU_OPERATION_OK;
332 }
333
iuu_rgbf_fill_buffer(u8 * buf,u8 r1,u8 r2,u8 g1,u8 g2,u8 b1,u8 b2,u8 freq)334 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
335 u8 b2, u8 freq)
336 {
337 *buf++ = IUU_SET_LED;
338 *buf++ = r1;
339 *buf++ = r2;
340 *buf++ = g1;
341 *buf++ = g2;
342 *buf++ = b1;
343 *buf++ = b2;
344 *buf = freq;
345 }
346
iuu_led_activity_on(struct urb * urb)347 static void iuu_led_activity_on(struct urb *urb)
348 {
349 struct usb_serial_port *port = urb->context;
350 char *buf_ptr = port->write_urb->transfer_buffer;
351
352 if (xmas) {
353 buf_ptr[0] = IUU_SET_LED;
354 get_random_bytes(buf_ptr + 1, 6);
355 buf_ptr[7] = 1;
356 } else {
357 iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
358 }
359
360 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
361 usb_sndbulkpipe(port->serial->dev,
362 port->bulk_out_endpointAddress),
363 port->write_urb->transfer_buffer, 8 ,
364 iuu_rxcmd, port);
365 usb_submit_urb(port->write_urb, GFP_ATOMIC);
366 }
367
iuu_led_activity_off(struct urb * urb)368 static void iuu_led_activity_off(struct urb *urb)
369 {
370 struct usb_serial_port *port = urb->context;
371 char *buf_ptr = port->write_urb->transfer_buffer;
372
373 if (xmas) {
374 iuu_rxcmd(urb);
375 return;
376 }
377
378 iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
379
380 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
381 usb_sndbulkpipe(port->serial->dev,
382 port->bulk_out_endpointAddress),
383 port->write_urb->transfer_buffer, 8 ,
384 iuu_rxcmd, port);
385 usb_submit_urb(port->write_urb, GFP_ATOMIC);
386 }
387
388
389
iuu_clk(struct usb_serial_port * port,int dwFrq)390 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
391 {
392 int status;
393 struct iuu_private *priv = usb_get_serial_port_data(port);
394 int Count = 0;
395 u8 FrqGenAdr = 0x69;
396 u8 DIV = 0; /* 8bit */
397 u8 XDRV = 0; /* 8bit */
398 u8 PUMP = 0; /* 3bit */
399 u8 PBmsb = 0; /* 2bit */
400 u8 PBlsb = 0; /* 8bit */
401 u8 PO = 0; /* 1bit */
402 u8 Q = 0; /* 7bit */
403 /* 24bit = 3bytes */
404 unsigned int P = 0;
405 unsigned int P2 = 0;
406 int frq = (int)dwFrq;
407
408 if (frq == 0) {
409 priv->buf[Count++] = IUU_UART_WRITE_I2C;
410 priv->buf[Count++] = FrqGenAdr << 1;
411 priv->buf[Count++] = 0x09;
412 priv->buf[Count++] = 0x00;
413
414 status = bulk_immediate(port, (u8 *) priv->buf, Count);
415 if (status != 0) {
416 dev_dbg(&port->dev, "%s - write error\n", __func__);
417 return status;
418 }
419 } else if (frq == 3579000) {
420 DIV = 100;
421 P = 1193;
422 Q = 40;
423 XDRV = 0;
424 } else if (frq == 3680000) {
425 DIV = 105;
426 P = 161;
427 Q = 5;
428 XDRV = 0;
429 } else if (frq == 6000000) {
430 DIV = 66;
431 P = 66;
432 Q = 2;
433 XDRV = 0x28;
434 } else {
435 unsigned int result = 0;
436 unsigned int tmp = 0;
437 unsigned int check;
438 unsigned int check2;
439 char found = 0x00;
440 unsigned int lQ = 2;
441 unsigned int lP = 2055;
442 unsigned int lDiv = 4;
443
444 for (lQ = 2; lQ <= 47 && !found; lQ++)
445 for (lP = 2055; lP >= 8 && !found; lP--)
446 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
447 tmp = (12000000 / lDiv) * (lP / lQ);
448 if (abs((int)(tmp - frq)) <
449 abs((int)(frq - result))) {
450 check2 = (12000000 / lQ);
451 if (check2 < 250000)
452 continue;
453 check = (12000000 / lQ) * lP;
454 if (check > 400000000)
455 continue;
456 if (check < 100000000)
457 continue;
458 if (lDiv < 4 || lDiv > 127)
459 continue;
460 result = tmp;
461 P = lP;
462 DIV = lDiv;
463 Q = lQ;
464 if (result == frq)
465 found = 0x01;
466 }
467 }
468 }
469 P2 = ((P - PO) / 2) - 4;
470 PUMP = 0x04;
471 PBmsb = (P2 >> 8 & 0x03);
472 PBlsb = P2 & 0xFF;
473 PO = (P >> 10) & 0x01;
474 Q = Q - 2;
475
476 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
477 priv->buf[Count++] = FrqGenAdr << 1;
478 priv->buf[Count++] = 0x09;
479 priv->buf[Count++] = 0x20; /* Adr = 0x09 */
480 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
481 priv->buf[Count++] = FrqGenAdr << 1;
482 priv->buf[Count++] = 0x0C;
483 priv->buf[Count++] = DIV; /* Adr = 0x0C */
484 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
485 priv->buf[Count++] = FrqGenAdr << 1;
486 priv->buf[Count++] = 0x12;
487 priv->buf[Count++] = XDRV; /* Adr = 0x12 */
488 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
489 priv->buf[Count++] = FrqGenAdr << 1;
490 priv->buf[Count++] = 0x13;
491 priv->buf[Count++] = 0x6B; /* Adr = 0x13 */
492 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
493 priv->buf[Count++] = FrqGenAdr << 1;
494 priv->buf[Count++] = 0x40;
495 priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
496 (PBmsb & 0x03); /* Adr = 0x40 */
497 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
498 priv->buf[Count++] = FrqGenAdr << 1;
499 priv->buf[Count++] = 0x41;
500 priv->buf[Count++] = PBlsb; /* Adr = 0x41 */
501 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
502 priv->buf[Count++] = FrqGenAdr << 1;
503 priv->buf[Count++] = 0x42;
504 priv->buf[Count++] = Q | (((PO & 0x01) << 7)); /* Adr = 0x42 */
505 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
506 priv->buf[Count++] = FrqGenAdr << 1;
507 priv->buf[Count++] = 0x44;
508 priv->buf[Count++] = (char)0xFF; /* Adr = 0x44 */
509 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
510 priv->buf[Count++] = FrqGenAdr << 1;
511 priv->buf[Count++] = 0x45;
512 priv->buf[Count++] = (char)0xFE; /* Adr = 0x45 */
513 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
514 priv->buf[Count++] = FrqGenAdr << 1;
515 priv->buf[Count++] = 0x46;
516 priv->buf[Count++] = 0x7F; /* Adr = 0x46 */
517 priv->buf[Count++] = IUU_UART_WRITE_I2C; /* 0x4C */
518 priv->buf[Count++] = FrqGenAdr << 1;
519 priv->buf[Count++] = 0x47;
520 priv->buf[Count++] = (char)0x84; /* Adr = 0x47 */
521
522 status = bulk_immediate(port, (u8 *) priv->buf, Count);
523 if (status != IUU_OPERATION_OK)
524 dev_dbg(&port->dev, "%s - write error\n", __func__);
525 return status;
526 }
527
iuu_uart_flush(struct usb_serial_port * port)528 static int iuu_uart_flush(struct usb_serial_port *port)
529 {
530 struct device *dev = &port->dev;
531 int i;
532 int status;
533 u8 *rxcmd;
534 struct iuu_private *priv = usb_get_serial_port_data(port);
535
536 if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
537 return -EIO;
538
539 rxcmd = kmalloc(1, GFP_KERNEL);
540 if (!rxcmd)
541 return -ENOMEM;
542
543 rxcmd[0] = IUU_UART_RX;
544
545 for (i = 0; i < 2; i++) {
546 status = bulk_immediate(port, rxcmd, 1);
547 if (status != IUU_OPERATION_OK) {
548 dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
549 goto out_free;
550 }
551
552 status = read_immediate(port, &priv->len, 1);
553 if (status != IUU_OPERATION_OK) {
554 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
555 goto out_free;
556 }
557
558 if (priv->len > 0) {
559 dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
560 status = read_immediate(port, priv->buf, priv->len);
561 if (status != IUU_OPERATION_OK) {
562 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
563 goto out_free;
564 }
565 }
566 }
567 dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
568 iuu_led(port, 0, 0xF000, 0, 0xFF);
569
570 out_free:
571 kfree(rxcmd);
572
573 return status;
574 }
575
read_buf_callback(struct urb * urb)576 static void read_buf_callback(struct urb *urb)
577 {
578 struct usb_serial_port *port = urb->context;
579 unsigned char *data = urb->transfer_buffer;
580 int status = urb->status;
581
582 if (status) {
583 if (status == -EPROTO) {
584 /* reschedule needed */
585 }
586 return;
587 }
588
589 dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
590
591 if (urb->actual_length) {
592 tty_insert_flip_string(&port->port, data, urb->actual_length);
593 tty_flip_buffer_push(&port->port);
594 }
595 iuu_led_activity_on(urb);
596 }
597
iuu_bulk_write(struct usb_serial_port * port)598 static int iuu_bulk_write(struct usb_serial_port *port)
599 {
600 struct iuu_private *priv = usb_get_serial_port_data(port);
601 unsigned long flags;
602 int result;
603 int buf_len;
604 char *buf_ptr = port->write_urb->transfer_buffer;
605
606 spin_lock_irqsave(&priv->lock, flags);
607 *buf_ptr++ = IUU_UART_ESC;
608 *buf_ptr++ = IUU_UART_TX;
609 *buf_ptr++ = priv->writelen;
610
611 memcpy(buf_ptr, priv->writebuf, priv->writelen);
612 buf_len = priv->writelen;
613 priv->writelen = 0;
614 spin_unlock_irqrestore(&priv->lock, flags);
615 dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
616 buf_len, buf_len, buf_ptr);
617 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
618 usb_sndbulkpipe(port->serial->dev,
619 port->bulk_out_endpointAddress),
620 port->write_urb->transfer_buffer, buf_len + 3,
621 iuu_rxcmd, port);
622 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
623 usb_serial_port_softint(port);
624 return result;
625 }
626
iuu_read_buf(struct usb_serial_port * port,int len)627 static int iuu_read_buf(struct usb_serial_port *port, int len)
628 {
629 int result;
630
631 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
632 usb_rcvbulkpipe(port->serial->dev,
633 port->bulk_in_endpointAddress),
634 port->read_urb->transfer_buffer, len,
635 read_buf_callback, port);
636 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
637 return result;
638 }
639
iuu_uart_read_callback(struct urb * urb)640 static void iuu_uart_read_callback(struct urb *urb)
641 {
642 struct usb_serial_port *port = urb->context;
643 struct iuu_private *priv = usb_get_serial_port_data(port);
644 unsigned long flags;
645 int status = urb->status;
646 int len = 0;
647 unsigned char *data = urb->transfer_buffer;
648 priv->poll++;
649
650 if (status) {
651 dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
652 /* error stop all */
653 return;
654 }
655
656 if (urb->actual_length == 1)
657 len = (int) data[0];
658
659 if (urb->actual_length > 1) {
660 dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
661 urb->actual_length);
662 return;
663 }
664 /* if len > 0 call readbuf */
665
666 if (len > 0) {
667 dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
668 __func__, len);
669 status = iuu_read_buf(port, len);
670 return;
671 }
672 /* need to update status ? */
673 if (priv->poll > 99) {
674 status = iuu_status(port);
675 priv->poll = 0;
676 return;
677 }
678
679 /* reset waiting ? */
680
681 if (priv->reset == 1) {
682 status = iuu_reset(port, 0xC);
683 return;
684 }
685 /* Writebuf is waiting */
686 spin_lock_irqsave(&priv->lock, flags);
687 if (priv->writelen > 0) {
688 spin_unlock_irqrestore(&priv->lock, flags);
689 status = iuu_bulk_write(port);
690 return;
691 }
692 spin_unlock_irqrestore(&priv->lock, flags);
693 /* if nothing to write call again rxcmd */
694 dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
695 iuu_led_activity_off(urb);
696 }
697
iuu_uart_write(struct tty_struct * tty,struct usb_serial_port * port,const u8 * buf,int count)698 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
699 const u8 *buf, int count)
700 {
701 struct iuu_private *priv = usb_get_serial_port_data(port);
702 unsigned long flags;
703
704 spin_lock_irqsave(&priv->lock, flags);
705
706 count = min(count, 256 - priv->writelen);
707 if (count == 0)
708 goto out;
709
710 /* fill the buffer */
711 memcpy(priv->writebuf + priv->writelen, buf, count);
712 priv->writelen += count;
713 out:
714 spin_unlock_irqrestore(&priv->lock, flags);
715
716 return count;
717 }
718
read_rxcmd_callback(struct urb * urb)719 static void read_rxcmd_callback(struct urb *urb)
720 {
721 struct usb_serial_port *port = urb->context;
722 int result;
723 int status = urb->status;
724
725 if (status) {
726 /* error stop all */
727 return;
728 }
729
730 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
731 usb_rcvbulkpipe(port->serial->dev,
732 port->bulk_in_endpointAddress),
733 port->read_urb->transfer_buffer, 256,
734 iuu_uart_read_callback, port);
735 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
736 dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
737 }
738
iuu_uart_on(struct usb_serial_port * port)739 static int iuu_uart_on(struct usb_serial_port *port)
740 {
741 int status;
742 u8 *buf;
743
744 buf = kmalloc(4, GFP_KERNEL);
745
746 if (!buf)
747 return -ENOMEM;
748
749 buf[0] = IUU_UART_ENABLE;
750 buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
751 buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
752 buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
753
754 status = bulk_immediate(port, buf, 4);
755 if (status != IUU_OPERATION_OK) {
756 dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
757 goto uart_enable_failed;
758 }
759 /* iuu_reset() the card after iuu_uart_on() */
760 status = iuu_uart_flush(port);
761 if (status != IUU_OPERATION_OK)
762 dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
763 uart_enable_failed:
764 kfree(buf);
765 return status;
766 }
767
768 /* Disables the IUU UART (a.k.a. the Phoenix voiderface) */
iuu_uart_off(struct usb_serial_port * port)769 static int iuu_uart_off(struct usb_serial_port *port)
770 {
771 int status;
772 u8 *buf;
773 buf = kmalloc(1, GFP_KERNEL);
774 if (!buf)
775 return -ENOMEM;
776 buf[0] = IUU_UART_DISABLE;
777
778 status = bulk_immediate(port, buf, 1);
779 if (status != IUU_OPERATION_OK)
780 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
781
782 kfree(buf);
783 return status;
784 }
785
iuu_uart_baud(struct usb_serial_port * port,u32 baud_base,u32 * actual,u8 parity)786 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
787 u32 *actual, u8 parity)
788 {
789 int status;
790 u32 baud;
791 u8 *dataout;
792 u8 DataCount = 0;
793 u8 T1Frekvens = 0;
794 u8 T1reload = 0;
795 unsigned int T1FrekvensHZ = 0;
796
797 dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
798 dataout = kmalloc(5, GFP_KERNEL);
799
800 if (!dataout)
801 return -ENOMEM;
802 /*baud = (((priv->clk / 35) * baud_base) / 100000); */
803 baud = baud_base;
804
805 if (baud < 1200 || baud > 230400) {
806 kfree(dataout);
807 return IUU_INVALID_PARAMETER;
808 }
809 if (baud > 977) {
810 T1Frekvens = 3;
811 T1FrekvensHZ = 500000;
812 }
813
814 if (baud > 3906) {
815 T1Frekvens = 2;
816 T1FrekvensHZ = 2000000;
817 }
818
819 if (baud > 11718) {
820 T1Frekvens = 1;
821 T1FrekvensHZ = 6000000;
822 }
823
824 if (baud > 46875) {
825 T1Frekvens = 0;
826 T1FrekvensHZ = 24000000;
827 }
828
829 T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
830
831 /* magic number here: ENTER_FIRMWARE_UPDATE; */
832 dataout[DataCount++] = IUU_UART_ESC;
833 /* magic number here: CHANGE_BAUD; */
834 dataout[DataCount++] = IUU_UART_CHANGE;
835 dataout[DataCount++] = T1Frekvens;
836 dataout[DataCount++] = T1reload;
837
838 *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
839
840 switch (parity & 0x0F) {
841 case IUU_PARITY_NONE:
842 dataout[DataCount++] = 0x00;
843 break;
844 case IUU_PARITY_EVEN:
845 dataout[DataCount++] = 0x01;
846 break;
847 case IUU_PARITY_ODD:
848 dataout[DataCount++] = 0x02;
849 break;
850 case IUU_PARITY_MARK:
851 dataout[DataCount++] = 0x03;
852 break;
853 case IUU_PARITY_SPACE:
854 dataout[DataCount++] = 0x04;
855 break;
856 default:
857 kfree(dataout);
858 return IUU_INVALID_PARAMETER;
859 }
860
861 switch (parity & 0xF0) {
862 case IUU_ONE_STOP_BIT:
863 dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
864 break;
865
866 case IUU_TWO_STOP_BITS:
867 dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
868 break;
869 default:
870 kfree(dataout);
871 return IUU_INVALID_PARAMETER;
872 }
873
874 status = bulk_immediate(port, dataout, DataCount);
875 if (status != IUU_OPERATION_OK)
876 dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
877 kfree(dataout);
878 return status;
879 }
880
iuu_set_termios(struct tty_struct * tty,struct usb_serial_port * port,const struct ktermios * old_termios)881 static void iuu_set_termios(struct tty_struct *tty,
882 struct usb_serial_port *port,
883 const struct ktermios *old_termios)
884 {
885 const u32 supported_mask = CMSPAR|PARENB|PARODD;
886 struct iuu_private *priv = usb_get_serial_port_data(port);
887 unsigned int cflag = tty->termios.c_cflag;
888 int status;
889 u32 actual;
890 u32 parity;
891 int csize = CS7;
892 int baud;
893 u32 newval = cflag & supported_mask;
894
895 /* Just use the ospeed. ispeed should be the same. */
896 baud = tty->termios.c_ospeed;
897
898 dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
899
900 /* compute the parity parameter */
901 parity = 0;
902 if (cflag & CMSPAR) { /* Using mark space */
903 if (cflag & PARODD)
904 parity |= IUU_PARITY_SPACE;
905 else
906 parity |= IUU_PARITY_MARK;
907 } else if (!(cflag & PARENB)) {
908 parity |= IUU_PARITY_NONE;
909 csize = CS8;
910 } else if (cflag & PARODD)
911 parity |= IUU_PARITY_ODD;
912 else
913 parity |= IUU_PARITY_EVEN;
914
915 parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
916
917 /* set it */
918 status = iuu_uart_baud(port,
919 baud * priv->boost / 100,
920 &actual, parity);
921
922 /* set the termios value to the real one, so the user now what has
923 * changed. We support few fields so its easies to copy the old hw
924 * settings back over and then adjust them
925 */
926 if (old_termios)
927 tty_termios_copy_hw(&tty->termios, old_termios);
928 if (status != 0) /* Set failed - return old bits */
929 return;
930 /* Re-encode speed, parity and csize */
931 tty_encode_baud_rate(tty, baud, baud);
932 tty->termios.c_cflag &= ~(supported_mask|CSIZE);
933 tty->termios.c_cflag |= newval | csize;
934 }
935
iuu_close(struct usb_serial_port * port)936 static void iuu_close(struct usb_serial_port *port)
937 {
938 /* iuu_led (port,255,0,0,0); */
939
940 iuu_uart_off(port);
941
942 usb_kill_urb(port->write_urb);
943 usb_kill_urb(port->read_urb);
944
945 iuu_led(port, 0, 0, 0xF000, 0xFF);
946 }
947
iuu_init_termios(struct tty_struct * tty)948 static void iuu_init_termios(struct tty_struct *tty)
949 {
950 tty->termios.c_cflag = B9600 | CS8 | CSTOPB | CREAD | PARENB | CLOCAL;
951 tty->termios.c_ispeed = 9600;
952 tty->termios.c_ospeed = 9600;
953 tty->termios.c_lflag = 0;
954 tty->termios.c_oflag = 0;
955 tty->termios.c_iflag = 0;
956 }
957
iuu_open(struct tty_struct * tty,struct usb_serial_port * port)958 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
959 {
960 struct usb_serial *serial = port->serial;
961 struct device *dev = &port->dev;
962 int result;
963 int baud;
964 u32 actual;
965 struct iuu_private *priv = usb_get_serial_port_data(port);
966
967 baud = tty->termios.c_ospeed;
968
969 dev_dbg(dev, "%s - baud %d\n", __func__, baud);
970 usb_clear_halt(serial->dev, port->write_urb->pipe);
971 usb_clear_halt(serial->dev, port->read_urb->pipe);
972
973 priv->poll = 0;
974
975 #define SOUP(a, b, c, d) do { \
976 result = usb_control_msg(port->serial->dev, \
977 usb_sndctrlpipe(port->serial->dev, 0), \
978 b, a, c, d, NULL, 0, 1000); \
979 dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x %d\n", a, b, c, d, result); } while (0)
980
981 /* This is not UART related but IUU USB driver related or something */
982 /* like that. Basically no IUU will accept any commands from the USB */
983 /* host unless it has received the following message */
984 /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
985
986 SOUP(0x03, 0x02, 0x02, 0x0);
987
988 iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
989 iuu_uart_on(port);
990 if (boost < 100)
991 boost = 100;
992 priv->boost = boost;
993 switch (clockmode) {
994 case 2: /* 3.680 Mhz */
995 priv->clk = IUU_CLK_3680000;
996 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
997 result =
998 iuu_uart_baud(port, baud * boost / 100, &actual,
999 IUU_PARITY_EVEN);
1000 break;
1001 case 3: /* 6.00 Mhz */
1002 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1003 priv->clk = IUU_CLK_6000000;
1004 /* Ratio of 6000000 to 3500000 for baud 9600 */
1005 result =
1006 iuu_uart_baud(port, 16457 * boost / 100, &actual,
1007 IUU_PARITY_EVEN);
1008 break;
1009 default: /* 3.579 Mhz */
1010 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1011 priv->clk = IUU_CLK_3579000;
1012 result =
1013 iuu_uart_baud(port, baud * boost / 100, &actual,
1014 IUU_PARITY_EVEN);
1015 }
1016
1017 /* set the cardin cardout signals */
1018 switch (cdmode) {
1019 case 0:
1020 iuu_cardin = 0;
1021 iuu_cardout = 0;
1022 break;
1023 case 1:
1024 iuu_cardin = TIOCM_CD;
1025 iuu_cardout = 0;
1026 break;
1027 case 2:
1028 iuu_cardin = 0;
1029 iuu_cardout = TIOCM_CD;
1030 break;
1031 case 3:
1032 iuu_cardin = TIOCM_DSR;
1033 iuu_cardout = 0;
1034 break;
1035 case 4:
1036 iuu_cardin = 0;
1037 iuu_cardout = TIOCM_DSR;
1038 break;
1039 case 5:
1040 iuu_cardin = TIOCM_CTS;
1041 iuu_cardout = 0;
1042 break;
1043 case 6:
1044 iuu_cardin = 0;
1045 iuu_cardout = TIOCM_CTS;
1046 break;
1047 case 7:
1048 iuu_cardin = TIOCM_RNG;
1049 iuu_cardout = 0;
1050 break;
1051 case 8:
1052 iuu_cardin = 0;
1053 iuu_cardout = TIOCM_RNG;
1054 }
1055
1056 iuu_uart_flush(port);
1057
1058 dev_dbg(dev, "%s - initialization done\n", __func__);
1059
1060 memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1061 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1062 usb_sndbulkpipe(port->serial->dev,
1063 port->bulk_out_endpointAddress),
1064 port->write_urb->transfer_buffer, 1,
1065 read_rxcmd_callback, port);
1066 result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1067 if (result) {
1068 dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1069 iuu_close(port);
1070 } else {
1071 dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1072 }
1073
1074 return result;
1075 }
1076
1077 /* how to change VCC */
iuu_vcc_set(struct usb_serial_port * port,unsigned int vcc)1078 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1079 {
1080 int status;
1081 u8 *buf;
1082
1083 buf = kmalloc(5, GFP_KERNEL);
1084 if (!buf)
1085 return -ENOMEM;
1086
1087 buf[0] = IUU_SET_VCC;
1088 buf[1] = vcc & 0xFF;
1089 buf[2] = (vcc >> 8) & 0xFF;
1090 buf[3] = (vcc >> 16) & 0xFF;
1091 buf[4] = (vcc >> 24) & 0xFF;
1092
1093 status = bulk_immediate(port, buf, 5);
1094 kfree(buf);
1095
1096 if (status != IUU_OPERATION_OK)
1097 dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1098 else
1099 dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1100
1101 return status;
1102 }
1103
1104 /*
1105 * Sysfs Attributes
1106 */
1107
vcc_mode_show(struct device * dev,struct device_attribute * attr,char * buf)1108 static ssize_t vcc_mode_show(struct device *dev,
1109 struct device_attribute *attr, char *buf)
1110 {
1111 struct usb_serial_port *port = to_usb_serial_port(dev);
1112 struct iuu_private *priv = usb_get_serial_port_data(port);
1113
1114 return sprintf(buf, "%d\n", priv->vcc);
1115 }
1116
vcc_mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)1117 static ssize_t vcc_mode_store(struct device *dev,
1118 struct device_attribute *attr, const char *buf, size_t count)
1119 {
1120 struct usb_serial_port *port = to_usb_serial_port(dev);
1121 struct iuu_private *priv = usb_get_serial_port_data(port);
1122 unsigned long v;
1123
1124 if (kstrtoul(buf, 10, &v)) {
1125 dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1126 __func__, buf);
1127 goto fail_store_vcc_mode;
1128 }
1129
1130 dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1131
1132 if ((v != 3) && (v != 5)) {
1133 dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1134 } else {
1135 iuu_vcc_set(port, v);
1136 priv->vcc = v;
1137 }
1138 fail_store_vcc_mode:
1139 return count;
1140 }
1141 static DEVICE_ATTR_RW(vcc_mode);
1142
iuu_create_sysfs_attrs(struct usb_serial_port * port)1143 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1144 {
1145 return device_create_file(&port->dev, &dev_attr_vcc_mode);
1146 }
1147
iuu_remove_sysfs_attrs(struct usb_serial_port * port)1148 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1149 {
1150 device_remove_file(&port->dev, &dev_attr_vcc_mode);
1151 return 0;
1152 }
1153
1154 /*
1155 * End Sysfs Attributes
1156 */
1157
1158 static struct usb_serial_driver iuu_device = {
1159 .driver = {
1160 .owner = THIS_MODULE,
1161 .name = "iuu_phoenix",
1162 },
1163 .id_table = id_table,
1164 .num_ports = 1,
1165 .num_bulk_in = 1,
1166 .num_bulk_out = 1,
1167 .bulk_in_size = 512,
1168 .bulk_out_size = 512,
1169 .open = iuu_open,
1170 .close = iuu_close,
1171 .write = iuu_uart_write,
1172 .read_bulk_callback = iuu_uart_read_callback,
1173 .tiocmget = iuu_tiocmget,
1174 .tiocmset = iuu_tiocmset,
1175 .set_termios = iuu_set_termios,
1176 .init_termios = iuu_init_termios,
1177 .port_probe = iuu_port_probe,
1178 .port_remove = iuu_port_remove,
1179 };
1180
1181 static struct usb_serial_driver * const serial_drivers[] = {
1182 &iuu_device, NULL
1183 };
1184
1185 module_usb_serial_driver(serial_drivers, id_table);
1186
1187 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1188
1189 MODULE_DESCRIPTION(DRIVER_DESC);
1190 MODULE_LICENSE("GPL");
1191
1192 module_param(xmas, bool, 0644);
1193 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1194
1195 module_param(boost, int, 0644);
1196 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1197
1198 module_param(clockmode, int, 0644);
1199 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1200 "3=6 Mhz)");
1201
1202 module_param(cdmode, int, 0644);
1203 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1204 "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1205
1206 module_param(vcc_default, int, 0644);
1207 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1208 "for 5V). Default to 5.");
1209
