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linux/drivers/usb/serial/ark3116.c
Alan Cox 606d099cdd [PATCH] tty: switch to ktermios 
This is the grungy swap all the occurrences in the right places patch that
goes with the updates.  At this point we have the same functionality as
before (except that sgttyb() returns speeds not zero) and are ready to
begin turning new stuff on providing nobody reports lots of bugs

If you are a tty driver author converting an out of tree driver the only
impact should be termios->ktermios name changes for the speed/property
setting functions from your upper layers.

If you are implementing your own TCGETS function before then your driver
was broken already and its about to get a whole lot more painful for you so
please fix it 8)

Also fill in c_ispeed/ospeed on init for most devices, although the current
code will do this for you anyway but I'd like eventually to lose that extra
paranoia

[akpm@osdl.org: bluetooth fix]
[mp3@de.ibm.com: sclp fix]
[mp3@de.ibm.com: warning fix for tty3270]
[hugh@veritas.com: fix tty_ioctl powerpc build]
[jdike@addtoit.com: uml: fix ->set_termios declaration]
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Acked-by: Peter Oberparleiter <oberpar@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-08 08:28:57 -08:00

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/*
* Copyright (C) 2006
* Simon Schulz (ark3116_driver <at> auctionant.de)
*
* ark3116
* - implements a driver for the arkmicro ark3116 chipset (vendor=0x6547,
* productid=0x0232) (used in a datacable called KQ-U8A)
*
* - based on code by krisfx -> thanks !!
* (see http://www.linuxquestions.org/questions/showthread.php?p=2184457#post2184457)
*
* - based on logs created by usbsnoopy
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/serial.h>
#include <asm/uaccess.h>
static int debug;
static struct usb_device_id id_table [] = {
{ USB_DEVICE(0x6547, 0x0232) },
{ },
};
MODULE_DEVICE_TABLE(usb, id_table);
struct ark3116_private {
spinlock_t lock;
u8 termios_initialized;
};
static inline void ARK3116_SND(struct usb_serial *serial, int seq,
__u8 request, __u8 requesttype,
__u16 value, __u16 index)
{
int result;
result = usb_control_msg(serial->dev,
usb_sndctrlpipe(serial->dev, 0),
request, requesttype, value, index,
NULL, 0x00, 1000);
dbg("%03d > ok", seq);
}
static inline void ARK3116_RCV(struct usb_serial *serial, int seq,
__u8 request, __u8 requesttype,
__u16 value, __u16 index, __u8 expected,
char *buf)
{
int result;
result = usb_control_msg(serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
request, requesttype, value, index,
buf, 0x0000001, 1000);
if (result)
dbg("%03d < %d bytes [0x%02X]", seq, result, buf[0]);
else
dbg("%03d < 0 bytes", seq);
}
static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
__u8 request, __u8 requesttype,
__u16 value, __u16 index, char *buf)
{
usb_control_msg(serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
request, requesttype, value, index,
buf, 0x0000001, 1000);
}
static int ark3116_attach(struct usb_serial *serial)
{
char *buf;
struct ark3116_private *priv;
int i;
for (i = 0; i < serial->num_ports; ++i) {
priv = kzalloc(sizeof(struct ark3116_private), GFP_KERNEL);
if (!priv)
goto cleanup;
spin_lock_init(&priv->lock);
usb_set_serial_port_data(serial->port[i], priv);
}
buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
dbg("error kmalloc -> out of mem?");
goto cleanup;
}
/* 3 */
ARK3116_SND(serial, 3, 0xFE, 0x40, 0x0008, 0x0002);
ARK3116_SND(serial, 4, 0xFE, 0x40, 0x0008, 0x0001);
ARK3116_SND(serial, 5, 0xFE, 0x40, 0x0000, 0x0008);
ARK3116_SND(serial, 6, 0xFE, 0x40, 0x0000, 0x000B);
/* <-- seq7 */
ARK3116_RCV(serial, 7, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
ARK3116_SND(serial, 8, 0xFE, 0x40, 0x0080, 0x0003);
ARK3116_SND(serial, 9, 0xFE, 0x40, 0x001A, 0x0000);
ARK3116_SND(serial, 10, 0xFE, 0x40, 0x0000, 0x0001);
ARK3116_SND(serial, 11, 0xFE, 0x40, 0x0000, 0x0003);
/* <-- seq12 */
ARK3116_RCV(serial, 12, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
ARK3116_SND(serial, 13, 0xFE, 0x40, 0x0000, 0x0004);
/* 14 */
ARK3116_RCV(serial, 14, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
ARK3116_SND(serial, 15, 0xFE, 0x40, 0x0000, 0x0004);
/* 16 */
ARK3116_RCV(serial, 16, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
/* --> seq17 */
ARK3116_SND(serial, 17, 0xFE, 0x40, 0x0001, 0x0004);
/* <-- seq18 */
ARK3116_RCV(serial, 18, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
/* --> seq19 */
ARK3116_SND(serial, 19, 0xFE, 0x40, 0x0003, 0x0004);
/* <-- seq20 */
/* seems like serial port status info (RTS, CTS, ...) */
/* returns modem control line status?! */
ARK3116_RCV(serial, 20, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
/* set 9600 baud & do some init?! */
ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
ARK3116_SND(serial, 148, 0xFE, 0x40, 0x0038, 0x0000);
ARK3116_SND(serial, 149, 0xFE, 0x40, 0x0001, 0x0001);
ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
ARK3116_SND(serial, 154, 0xFE, 0x40, 0x0003, 0x0003);
kfree(buf);
return 0;
cleanup:
for (--i; i >= 0; --i)
usb_set_serial_port_data(serial->port[i], NULL);
return -ENOMEM;
}
static void ark3116_set_termios(struct usb_serial_port *port,
struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct ark3116_private *priv = usb_get_serial_port_data(port);
unsigned int cflag = port->tty->termios->c_cflag;
unsigned long flags;
int baud;
int ark3116_baud;
char *buf;
char config;
config = 0;
dbg("%s - port %d", __FUNCTION__, port->number);
if ((!port->tty) || (!port->tty->termios)) {
dbg("%s - no tty structures", __FUNCTION__);
return;
}
spin_lock_irqsave(&priv->lock, flags);
if (!priv->termios_initialized) {
*(port->tty->termios) = tty_std_termios;
port->tty->termios->c_cflag = B9600 | CS8
| CREAD | HUPCL | CLOCAL;
priv->termios_initialized = 1;
}
spin_unlock_irqrestore(&priv->lock, flags);
cflag = port->tty->termios->c_cflag;
/* check that they really want us to change something: */
if (old_termios) {
if ((cflag == old_termios->c_cflag) &&
(RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
RELEVANT_IFLAG(old_termios->c_iflag))) {
dbg("%s - nothing to change...", __FUNCTION__);
return;
}
}
buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
dbg("error kmalloc");
return;
}
/* set data bit count (8/7/6/5) */
if (cflag & CSIZE) {
switch (cflag & CSIZE) {
case CS5:
config |= 0x00;
dbg("setting CS5");
break;
case CS6:
config |= 0x01;
dbg("setting CS6");
break;
case CS7:
config |= 0x02;
dbg("setting CS7");
break;
default:
err("CSIZE was set but not CS5-CS8, using CS8!");
/* fall through */
case CS8:
config |= 0x03;
dbg("setting CS8");
break;
}
}
/* set parity (NONE/EVEN/ODD) */
if (cflag & PARENB) {
if (cflag & PARODD) {
config |= 0x08;
dbg("setting parity to ODD");
} else {
config |= 0x18;
dbg("setting parity to EVEN");
}
} else {
dbg("setting parity to NONE");
}
/* set stop bit (1/2) */
if (cflag & CSTOPB) {
config |= 0x04;
dbg("setting 2 stop bits");
} else {
dbg("setting 1 stop bit");
}
/* set baudrate */
baud = 0;
switch (cflag & CBAUD) {
case B0:
err("can't set 0 baud, using 9600 instead");
break;
case B75: baud = 75; break;
case B150: baud = 150; break;
case B300: baud = 300; break;
case B600: baud = 600; break;
case B1200: baud = 1200; break;
case B1800: baud = 1800; break;
case B2400: baud = 2400; break;
case B4800: baud = 4800; break;
case B9600: baud = 9600; break;
case B19200: baud = 19200; break;
case B38400: baud = 38400; break;
case B57600: baud = 57600; break;
case B115200: baud = 115200; break;
case B230400: baud = 230400; break;
case B460800: baud = 460800; break;
default:
dbg("does not support the baudrate requested (fix it)");
break;
}
/* set 9600 as default (if given baudrate is invalid for example) */
if (baud == 0)
baud = 9600;
/*
* found by try'n'error, be careful, maybe there are other options
* for multiplicator etc!
*/
if (baud == 460800)
/* strange, for 460800 the formula is wrong
* if using round() then 9600baud is wrong) */
ark3116_baud = 7;
else
ark3116_baud = 3000000 / baud;
/* ? */
ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
/* offset = buf[0]; */
/* offset = 0x03; */
/* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
/* set baudrate */
dbg("setting baudrate to %d (->reg=%d)", baud, ark3116_baud);
ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
ARK3116_SND(serial, 148, 0xFE, 0x40,
(ark3116_baud & 0x00FF), 0x0000);
ARK3116_SND(serial, 149, 0xFE, 0x40,
(ark3116_baud & 0xFF00) >> 8, 0x0001);
ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
/* ? */
ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
/* set data bit count, stop bit count & parity: */
dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
if (cflag & CRTSCTS)
dbg("CRTSCTS not supported by chipset?!");
/* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
kfree(buf);
return;
}
static int ark3116_open(struct usb_serial_port *port, struct file *filp)
{
struct ktermios tmp_termios;
struct usb_serial *serial = port->serial;
char *buf;
int result = 0;
dbg("%s - port %d", __FUNCTION__, port->number);
buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
dbg("error kmalloc -> out of mem?");
return -ENOMEM;
}
result = usb_serial_generic_open(port, filp);
if (result)
return result;
/* open */
ARK3116_RCV(serial, 111, 0xFE, 0xC0, 0x0000, 0x0003, 0x02, buf);
ARK3116_SND(serial, 112, 0xFE, 0x40, 0x0082, 0x0003);
ARK3116_SND(serial, 113, 0xFE, 0x40, 0x001A, 0x0000);
ARK3116_SND(serial, 114, 0xFE, 0x40, 0x0000, 0x0001);
ARK3116_SND(serial, 115, 0xFE, 0x40, 0x0002, 0x0003);
ARK3116_RCV(serial, 116, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
/* returns different values (control lines?!) */
ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
/* initialise termios */
if (port->tty)
ark3116_set_termios(port, &tmp_termios);
kfree(buf);
return result;
}
static int ark3116_ioctl(struct usb_serial_port *port, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct serial_struct serstruct;
void __user *user_arg = (void __user *)arg;
switch (cmd) {
case TIOCGSERIAL:
/* XXX: Some of these values are probably wrong. */
memset(&serstruct, 0, sizeof (serstruct));
serstruct.type = PORT_16654;
serstruct.line = port->serial->minor;
serstruct.port = port->number;
serstruct.custom_divisor = 0;
serstruct.baud_base = 460800;
if (copy_to_user(user_arg, &serstruct, sizeof (serstruct)))
return -EFAULT;
return 0;
case TIOCSSERIAL:
if (copy_from_user(&serstruct, user_arg, sizeof (serstruct)))
return -EFAULT;
return 0;
default:
dbg("%s cmd 0x%04x not supported", __FUNCTION__, cmd);
break;
}
return -ENOIOCTLCMD;
}
static int ark3116_tiocmget(struct usb_serial_port *port, struct file *file)
{
struct usb_serial *serial = port->serial;
char *buf;
char temp;
/* seems like serial port status info (RTS, CTS, ...) is stored
* in reg(?) 0x0006
* pcb connection point 11 = GND -> sets bit4 of response
* pcb connection point 7 = GND -> sets bit6 of response
*/
buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
dbg("error kmalloc");
return -ENOMEM;
}
/* read register */
ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
temp = buf[0];
kfree(buf);
/* i do not really know if bit4=CTS and bit6=DSR... just a
* quick guess!
*/
return (temp & (1<<4) ? TIOCM_CTS : 0)
| (temp & (1<<6) ? TIOCM_DSR : 0);
}
static struct usb_driver ark3116_driver = {
.name = "ark3116",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table,
};
static struct usb_serial_driver ark3116_device = {
.driver = {
.owner = THIS_MODULE,
.name = "ark3116",
},
.id_table = id_table,
.num_interrupt_in = 1,
.num_bulk_in = 1,
.num_bulk_out = 1,
.num_ports = 1,
.attach = ark3116_attach,
.set_termios = ark3116_set_termios,
.ioctl = ark3116_ioctl,
.tiocmget = ark3116_tiocmget,
.open = ark3116_open,
};
static int __init ark3116_init(void)
{
int retval;
retval = usb_serial_register(&ark3116_device);
if (retval)
return retval;
retval = usb_register(&ark3116_driver);
if (retval)
usb_serial_deregister(&ark3116_device);
return retval;
}
static void __exit ark3116_exit(void)
{
usb_deregister(&ark3116_driver);
usb_serial_deregister(&ark3116_device);
}
module_init(ark3116_init);
module_exit(ark3116_exit);
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
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