3 * Simon Schulz (ark3116_driver <at> auctionant.de)
6 * - implements a driver for the arkmicro ark3116 chipset (vendor=0x6547,
7 * productid=0x0232) (used in a datacable called KQ-U8A)
9 * - based on code by krisfx -> thanks !!
10 * (see http://www.linuxquestions.org/questions/showthread.php?p=2184457#post2184457)
12 * - based on logs created by usbsnoopy
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/tty.h>
23 #include <linux/module.h>
24 #include <linux/usb.h>
25 #include <linux/usb/serial.h>
26 #include <linux/serial.h>
27 #include <asm/uaccess.h>
32 static struct usb_device_id id_table [] = {
33 { USB_DEVICE(0x6547, 0x0232) },
36 MODULE_DEVICE_TABLE(usb, id_table);
38 struct ark3116_private {
40 u8 termios_initialized;
43 static inline void ARK3116_SND(struct usb_serial *serial, int seq,
44 __u8 request, __u8 requesttype,
45 __u16 value, __u16 index)
48 result = usb_control_msg(serial->dev,
49 usb_sndctrlpipe(serial->dev, 0),
50 request, requesttype, value, index,
52 dbg("%03d > ok", seq);
55 static inline void ARK3116_RCV(struct usb_serial *serial, int seq,
56 __u8 request, __u8 requesttype,
57 __u16 value, __u16 index, __u8 expected,
61 result = usb_control_msg(serial->dev,
62 usb_rcvctrlpipe(serial->dev, 0),
63 request, requesttype, value, index,
64 buf, 0x0000001, 1000);
66 dbg("%03d < %d bytes [0x%02X]", seq, result, buf[0]);
68 dbg("%03d < 0 bytes", seq);
71 static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
72 __u8 request, __u8 requesttype,
73 __u16 value, __u16 index, char *buf)
75 usb_control_msg(serial->dev,
76 usb_rcvctrlpipe(serial->dev, 0),
77 request, requesttype, value, index,
78 buf, 0x0000001, 1000);
81 static int ark3116_attach(struct usb_serial *serial)
84 struct ark3116_private *priv;
87 for (i = 0; i < serial->num_ports; ++i) {
88 priv = kzalloc(sizeof(struct ark3116_private), GFP_KERNEL);
91 spin_lock_init(&priv->lock);
93 usb_set_serial_port_data(serial->port[i], priv);
96 buf = kmalloc(1, GFP_KERNEL);
98 dbg("error kmalloc -> out of mem?");
103 ARK3116_SND(serial, 3, 0xFE, 0x40, 0x0008, 0x0002);
104 ARK3116_SND(serial, 4, 0xFE, 0x40, 0x0008, 0x0001);
105 ARK3116_SND(serial, 5, 0xFE, 0x40, 0x0000, 0x0008);
106 ARK3116_SND(serial, 6, 0xFE, 0x40, 0x0000, 0x000B);
109 ARK3116_RCV(serial, 7, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
110 ARK3116_SND(serial, 8, 0xFE, 0x40, 0x0080, 0x0003);
111 ARK3116_SND(serial, 9, 0xFE, 0x40, 0x001A, 0x0000);
112 ARK3116_SND(serial, 10, 0xFE, 0x40, 0x0000, 0x0001);
113 ARK3116_SND(serial, 11, 0xFE, 0x40, 0x0000, 0x0003);
116 ARK3116_RCV(serial, 12, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
117 ARK3116_SND(serial, 13, 0xFE, 0x40, 0x0000, 0x0004);
120 ARK3116_RCV(serial, 14, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
121 ARK3116_SND(serial, 15, 0xFE, 0x40, 0x0000, 0x0004);
124 ARK3116_RCV(serial, 16, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
126 ARK3116_SND(serial, 17, 0xFE, 0x40, 0x0001, 0x0004);
129 ARK3116_RCV(serial, 18, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
132 ARK3116_SND(serial, 19, 0xFE, 0x40, 0x0003, 0x0004);
135 /* seems like serial port status info (RTS, CTS, ...) */
136 /* returns modem control line status?! */
137 ARK3116_RCV(serial, 20, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
139 /* set 9600 baud & do some init?! */
140 ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
141 ARK3116_SND(serial, 148, 0xFE, 0x40, 0x0038, 0x0000);
142 ARK3116_SND(serial, 149, 0xFE, 0x40, 0x0001, 0x0001);
143 ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
144 ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
145 ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
146 ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
147 ARK3116_SND(serial, 154, 0xFE, 0x40, 0x0003, 0x0003);
153 for (--i; i >= 0; --i)
154 usb_set_serial_port_data(serial->port[i], NULL);
158 static void ark3116_set_termios(struct usb_serial_port *port,
159 struct ktermios *old_termios)
161 struct usb_serial *serial = port->serial;
162 struct ark3116_private *priv = usb_get_serial_port_data(port);
163 unsigned int cflag = port->tty->termios->c_cflag;
172 dbg("%s - port %d", __FUNCTION__, port->number);
174 if ((!port->tty) || (!port->tty->termios)) {
175 dbg("%s - no tty structures", __FUNCTION__);
179 spin_lock_irqsave(&priv->lock, flags);
180 if (!priv->termios_initialized) {
181 *(port->tty->termios) = tty_std_termios;
182 port->tty->termios->c_cflag = B9600 | CS8
183 | CREAD | HUPCL | CLOCAL;
184 priv->termios_initialized = 1;
186 spin_unlock_irqrestore(&priv->lock, flags);
188 cflag = port->tty->termios->c_cflag;
190 /* check that they really want us to change something: */
192 if ((cflag == old_termios->c_cflag) &&
193 (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
194 RELEVANT_IFLAG(old_termios->c_iflag))) {
195 dbg("%s - nothing to change...", __FUNCTION__);
200 buf = kmalloc(1, GFP_KERNEL);
202 dbg("error kmalloc");
206 /* set data bit count (8/7/6/5) */
208 switch (cflag & CSIZE) {
222 err("CSIZE was set but not CS5-CS8, using CS8!");
231 /* set parity (NONE/EVEN/ODD) */
232 if (cflag & PARENB) {
233 if (cflag & PARODD) {
235 dbg("setting parity to ODD");
238 dbg("setting parity to EVEN");
241 dbg("setting parity to NONE");
244 /* set stop bit (1/2) */
245 if (cflag & CSTOPB) {
247 dbg("setting 2 stop bits");
249 dbg("setting 1 stop bit");
254 switch (cflag & CBAUD) {
256 err("can't set 0 baud, using 9600 instead");
258 case B75: baud = 75; break;
259 case B150: baud = 150; break;
260 case B300: baud = 300; break;
261 case B600: baud = 600; break;
262 case B1200: baud = 1200; break;
263 case B1800: baud = 1800; break;
264 case B2400: baud = 2400; break;
265 case B4800: baud = 4800; break;
266 case B9600: baud = 9600; break;
267 case B19200: baud = 19200; break;
268 case B38400: baud = 38400; break;
269 case B57600: baud = 57600; break;
270 case B115200: baud = 115200; break;
271 case B230400: baud = 230400; break;
272 case B460800: baud = 460800; break;
274 dbg("does not support the baudrate requested (fix it)");
278 /* set 9600 as default (if given baudrate is invalid for example) */
283 * found by try'n'error, be careful, maybe there are other options
284 * for multiplicator etc!
287 /* strange, for 460800 the formula is wrong
288 * if using round() then 9600baud is wrong) */
291 ark3116_baud = 3000000 / baud;
294 ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
296 /* offset = buf[0]; */
298 /* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
301 dbg("setting baudrate to %d (->reg=%d)", baud, ark3116_baud);
302 ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
303 ARK3116_SND(serial, 148, 0xFE, 0x40,
304 (ark3116_baud & 0x00FF), 0x0000);
305 ARK3116_SND(serial, 149, 0xFE, 0x40,
306 (ark3116_baud & 0xFF00) >> 8, 0x0001);
307 ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
310 ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
311 ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
313 /* set data bit count, stop bit count & parity: */
314 dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
315 ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
316 ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
319 dbg("CRTSCTS not supported by chipset?!");
321 /* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
327 static int ark3116_open(struct usb_serial_port *port, struct file *filp)
329 struct ktermios tmp_termios;
330 struct usb_serial *serial = port->serial;
334 dbg("%s - port %d", __FUNCTION__, port->number);
336 buf = kmalloc(1, GFP_KERNEL);
338 dbg("error kmalloc -> out of mem?");
342 result = usb_serial_generic_open(port, filp);
347 ARK3116_RCV(serial, 111, 0xFE, 0xC0, 0x0000, 0x0003, 0x02, buf);
349 ARK3116_SND(serial, 112, 0xFE, 0x40, 0x0082, 0x0003);
350 ARK3116_SND(serial, 113, 0xFE, 0x40, 0x001A, 0x0000);
351 ARK3116_SND(serial, 114, 0xFE, 0x40, 0x0000, 0x0001);
352 ARK3116_SND(serial, 115, 0xFE, 0x40, 0x0002, 0x0003);
354 ARK3116_RCV(serial, 116, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
355 ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
357 ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
358 ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
360 ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
362 ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
364 ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
366 ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
368 /* returns different values (control lines?!) */
369 ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
371 /* initialise termios */
373 ark3116_set_termios(port, &tmp_termios);
381 static int ark3116_ioctl(struct usb_serial_port *port, struct file *file,
382 unsigned int cmd, unsigned long arg)
384 struct serial_struct serstruct;
385 void __user *user_arg = (void __user *)arg;
389 /* XXX: Some of these values are probably wrong. */
390 memset(&serstruct, 0, sizeof (serstruct));
391 serstruct.type = PORT_16654;
392 serstruct.line = port->serial->minor;
393 serstruct.port = port->number;
394 serstruct.custom_divisor = 0;
395 serstruct.baud_base = 460800;
397 if (copy_to_user(user_arg, &serstruct, sizeof (serstruct)))
402 if (copy_from_user(&serstruct, user_arg, sizeof (serstruct)))
406 dbg("%s cmd 0x%04x not supported", __FUNCTION__, cmd);
413 static int ark3116_tiocmget(struct usb_serial_port *port, struct file *file)
415 struct usb_serial *serial = port->serial;
419 /* seems like serial port status info (RTS, CTS, ...) is stored
421 * pcb connection point 11 = GND -> sets bit4 of response
422 * pcb connection point 7 = GND -> sets bit6 of response
425 buf = kmalloc(1, GFP_KERNEL);
427 dbg("error kmalloc");
432 ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
436 /* i do not really know if bit4=CTS and bit6=DSR... just a
439 return (temp & (1<<4) ? TIOCM_CTS : 0)
440 | (temp & (1<<6) ? TIOCM_DSR : 0);
443 static struct usb_driver ark3116_driver = {
445 .probe = usb_serial_probe,
446 .disconnect = usb_serial_disconnect,
447 .id_table = id_table,
451 static struct usb_serial_driver ark3116_device = {
453 .owner = THIS_MODULE,
456 .id_table = id_table,
457 .usb_driver = &ark3116_driver,
458 .num_interrupt_in = 1,
462 .attach = ark3116_attach,
463 .set_termios = ark3116_set_termios,
464 .ioctl = ark3116_ioctl,
465 .tiocmget = ark3116_tiocmget,
466 .open = ark3116_open,
469 static int __init ark3116_init(void)
473 retval = usb_serial_register(&ark3116_device);
476 retval = usb_register(&ark3116_driver);
478 usb_serial_deregister(&ark3116_device);
482 static void __exit ark3116_exit(void)
484 usb_deregister(&ark3116_driver);
485 usb_serial_deregister(&ark3116_device);
488 module_init(ark3116_init);
489 module_exit(ark3116_exit);
490 MODULE_LICENSE("GPL");
492 module_param(debug, bool, S_IRUGO | S_IWUSR);
493 MODULE_PARM_DESC(debug, "Debug enabled or not");