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,
67 ((unsigned char *)buf)[0]);
69 dbg("%03d < 0 bytes", seq);
72 static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
73 __u8 request, __u8 requesttype,
74 __u16 value, __u16 index, char *buf)
76 usb_control_msg(serial->dev,
77 usb_rcvctrlpipe(serial->dev, 0),
78 request, requesttype, value, index,
79 buf, 0x0000001, 1000);
82 static int ark3116_attach(struct usb_serial *serial)
85 struct ark3116_private *priv;
88 for (i = 0; i < serial->num_ports; ++i) {
89 priv = kzalloc(sizeof(struct ark3116_private), GFP_KERNEL);
92 spin_lock_init(&priv->lock);
94 usb_set_serial_port_data(serial->port[i], priv);
97 buf = kmalloc(1, GFP_KERNEL);
99 dbg("error kmalloc -> out of mem?");
104 ARK3116_SND(serial, 3, 0xFE, 0x40, 0x0008, 0x0002);
105 ARK3116_SND(serial, 4, 0xFE, 0x40, 0x0008, 0x0001);
106 ARK3116_SND(serial, 5, 0xFE, 0x40, 0x0000, 0x0008);
107 ARK3116_SND(serial, 6, 0xFE, 0x40, 0x0000, 0x000B);
110 ARK3116_RCV(serial, 7, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
111 ARK3116_SND(serial, 8, 0xFE, 0x40, 0x0080, 0x0003);
112 ARK3116_SND(serial, 9, 0xFE, 0x40, 0x001A, 0x0000);
113 ARK3116_SND(serial, 10, 0xFE, 0x40, 0x0000, 0x0001);
114 ARK3116_SND(serial, 11, 0xFE, 0x40, 0x0000, 0x0003);
117 ARK3116_RCV(serial, 12, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
118 ARK3116_SND(serial, 13, 0xFE, 0x40, 0x0000, 0x0004);
121 ARK3116_RCV(serial, 14, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
122 ARK3116_SND(serial, 15, 0xFE, 0x40, 0x0000, 0x0004);
125 ARK3116_RCV(serial, 16, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
127 ARK3116_SND(serial, 17, 0xFE, 0x40, 0x0001, 0x0004);
130 ARK3116_RCV(serial, 18, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
133 ARK3116_SND(serial, 19, 0xFE, 0x40, 0x0003, 0x0004);
136 /* seems like serial port status info (RTS, CTS, ...) */
137 /* returns modem control line status?! */
138 ARK3116_RCV(serial, 20, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
140 /* set 9600 baud & do some init?! */
141 ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
142 ARK3116_SND(serial, 148, 0xFE, 0x40, 0x0038, 0x0000);
143 ARK3116_SND(serial, 149, 0xFE, 0x40, 0x0001, 0x0001);
144 ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
145 ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
146 ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
147 ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
148 ARK3116_SND(serial, 154, 0xFE, 0x40, 0x0003, 0x0003);
154 for (--i; i >= 0; --i) {
155 kfree(usb_get_serial_port_data(serial->port[i]));
156 usb_set_serial_port_data(serial->port[i], NULL);
161 static void ark3116_set_termios(struct usb_serial_port *port,
162 struct ktermios *old_termios)
164 struct usb_serial *serial = port->serial;
165 struct ark3116_private *priv = usb_get_serial_port_data(port);
166 struct ktermios *termios = port->tty->termios;
167 unsigned int cflag = termios->c_cflag;
176 dbg("%s - port %d", __func__, port->number);
178 spin_lock_irqsave(&priv->lock, flags);
179 if (!priv->termios_initialized) {
180 *(port->tty->termios) = tty_std_termios;
181 port->tty->termios->c_cflag = B9600 | CS8
182 | CREAD | HUPCL | CLOCAL;
183 termios->c_ispeed = 9600;
184 termios->c_ospeed = 9600;
185 priv->termios_initialized = 1;
187 spin_unlock_irqrestore(&priv->lock, flags);
189 cflag = termios->c_cflag;
190 termios->c_cflag &= ~(CMSPAR|CRTSCTS);
192 buf = kmalloc(1, GFP_KERNEL);
194 dbg("error kmalloc");
195 *port->tty->termios = *old_termios;
199 /* set data bit count (8/7/6/5) */
201 switch (cflag & CSIZE) {
215 dbg("CSIZE was set but not CS5-CS8, using CS8!");
224 /* set parity (NONE/EVEN/ODD) */
225 if (cflag & PARENB) {
226 if (cflag & PARODD) {
228 dbg("setting parity to ODD");
231 dbg("setting parity to EVEN");
234 dbg("setting parity to NONE");
237 /* set stop bit (1/2) */
238 if (cflag & CSTOPB) {
240 dbg("setting 2 stop bits");
242 dbg("setting 1 stop bit");
246 baud = tty_get_baud_rate(port->tty);
264 /* Report the resulting rate back to the caller */
265 tty_encode_baud_rate(port->tty, baud, baud);
267 /* set 9600 as default (if given baudrate is invalid for example) */
269 tty_encode_baud_rate(port->tty, 9600, 9600);
275 * found by try'n'error, be careful, maybe there are other options
276 * for multiplicator etc! (3.5 for example)
279 /* strange, for 460800 the formula is wrong
280 * if using round() then 9600baud is wrong) */
283 ark3116_baud = 3000000 / baud;
286 ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
288 /* offset = buf[0]; */
290 /* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
293 dbg("setting baudrate to %d (->reg=%d)", baud, ark3116_baud);
294 ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
295 ARK3116_SND(serial, 148, 0xFE, 0x40,
296 (ark3116_baud & 0x00FF), 0x0000);
297 ARK3116_SND(serial, 149, 0xFE, 0x40,
298 (ark3116_baud & 0xFF00) >> 8, 0x0001);
299 ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
302 ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
303 ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
305 /* set data bit count, stop bit count & parity: */
306 dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
307 ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
308 ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
311 dbg("CRTSCTS not supported by chipset?!");
313 /* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
320 static int ark3116_open(struct usb_serial_port *port, struct file *filp)
322 struct ktermios tmp_termios;
323 struct usb_serial *serial = port->serial;
327 dbg("%s - port %d", __func__, port->number);
329 buf = kmalloc(1, GFP_KERNEL);
331 dbg("error kmalloc -> out of mem?");
335 result = usb_serial_generic_open(port, filp);
340 ARK3116_RCV(serial, 111, 0xFE, 0xC0, 0x0000, 0x0003, 0x02, buf);
342 ARK3116_SND(serial, 112, 0xFE, 0x40, 0x0082, 0x0003);
343 ARK3116_SND(serial, 113, 0xFE, 0x40, 0x001A, 0x0000);
344 ARK3116_SND(serial, 114, 0xFE, 0x40, 0x0000, 0x0001);
345 ARK3116_SND(serial, 115, 0xFE, 0x40, 0x0002, 0x0003);
347 ARK3116_RCV(serial, 116, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
348 ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
350 ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
351 ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
353 ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
355 ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
357 ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
359 ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
361 /* returns different values (control lines?!) */
362 ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
364 /* initialise termios */
366 ark3116_set_termios(port, &tmp_termios);
374 static int ark3116_ioctl(struct usb_serial_port *port, struct file *file,
375 unsigned int cmd, unsigned long arg)
377 struct serial_struct serstruct;
378 void __user *user_arg = (void __user *)arg;
382 /* XXX: Some of these values are probably wrong. */
383 memset(&serstruct, 0, sizeof (serstruct));
384 serstruct.type = PORT_16654;
385 serstruct.line = port->serial->minor;
386 serstruct.port = port->number;
387 serstruct.custom_divisor = 0;
388 serstruct.baud_base = 460800;
390 if (copy_to_user(user_arg, &serstruct, sizeof (serstruct)))
395 if (copy_from_user(&serstruct, user_arg, sizeof (serstruct)))
399 dbg("%s cmd 0x%04x not supported", __func__, cmd);
406 static int ark3116_tiocmget(struct usb_serial_port *port, struct file *file)
408 struct usb_serial *serial = port->serial;
412 /* seems like serial port status info (RTS, CTS, ...) is stored
414 * pcb connection point 11 = GND -> sets bit4 of response
415 * pcb connection point 7 = GND -> sets bit6 of response
418 buf = kmalloc(1, GFP_KERNEL);
420 dbg("error kmalloc");
425 ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
429 /* i do not really know if bit4=CTS and bit6=DSR... just a
432 return (temp & (1<<4) ? TIOCM_CTS : 0)
433 | (temp & (1<<6) ? TIOCM_DSR : 0);
436 static struct usb_driver ark3116_driver = {
438 .probe = usb_serial_probe,
439 .disconnect = usb_serial_disconnect,
440 .id_table = id_table,
444 static struct usb_serial_driver ark3116_device = {
446 .owner = THIS_MODULE,
449 .id_table = id_table,
450 .usb_driver = &ark3116_driver,
452 .attach = ark3116_attach,
453 .set_termios = ark3116_set_termios,
454 .ioctl = ark3116_ioctl,
455 .tiocmget = ark3116_tiocmget,
456 .open = ark3116_open,
459 static int __init ark3116_init(void)
463 retval = usb_serial_register(&ark3116_device);
466 retval = usb_register(&ark3116_driver);
468 usb_serial_deregister(&ark3116_device);
472 static void __exit ark3116_exit(void)
474 usb_deregister(&ark3116_driver);
475 usb_serial_deregister(&ark3116_device);
478 module_init(ark3116_init);
479 module_exit(ark3116_exit);
480 MODULE_LICENSE("GPL");
482 module_param(debug, bool, S_IRUGO | S_IWUSR);
483 MODULE_PARM_DESC(debug, "Debug enabled or not");