466 lines
12 KiB
C
466 lines
12 KiB
C
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/*
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* ark3116
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* - implements a driver for the arkmicro ark3116 chipset (vendor=0x6547,
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* productid=0x0232) (used in a datacable called KQ-U8A)
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*
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* - based on code by krisfx -> thanks !!
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* (see http://www.linuxquestions.org/questions/showthread.php?p=2184457#post2184457)
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*
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* - based on logs created by usbsnoopy
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*
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* Author : Simon Schulz [ark3116_driver<AT>auctionant.de]
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/tty.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include "usb-serial.h"
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static int debug;
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(0x6547, 0x0232) },
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{ },
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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struct ark3116_private {
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spinlock_t lock;
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u8 termios_initialized;
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};
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static inline void ARK3116_SND(struct usb_serial *serial, int seq,
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__u8 request, __u8 requesttype,
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__u16 value, __u16 index)
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{
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int result;
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result = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev,0),
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request, requesttype, value, index,
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NULL,0x00, 1000);
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dbg("%03d > ok",seq);
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}
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static inline void ARK3116_RCV(struct usb_serial *serial, int seq,
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__u8 request, __u8 requesttype,
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__u16 value, __u16 index, __u8 expected,
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char *buf)
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{
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int result;
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result = usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev,0),
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request, requesttype, value, index,
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buf, 0x0000001, 1000);
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if (result)
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dbg("%03d < %d bytes [0x%02X]",seq, result, buf[0]);
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else
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dbg("%03d < 0 bytes", seq);
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}
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static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
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__u8 request, __u8 requesttype,
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__u16 value, __u16 index, char *buf)
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{
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usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev,0),
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request, requesttype, value, index,
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buf, 0x0000001, 1000);
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}
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static int ark3116_attach(struct usb_serial *serial)
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{
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char *buf;
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struct ark3116_private *priv;
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int i;
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for (i = 0; i < serial->num_ports; ++i) {
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priv = kmalloc (sizeof (struct ark3116_private), GFP_KERNEL);
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if (!priv)
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goto cleanup;
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memset (priv, 0x00, sizeof (struct ark3116_private));
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spin_lock_init(&priv->lock);
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usb_set_serial_port_data(serial->port[i], priv);
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}
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buf = kmalloc(1, GFP_KERNEL);
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if (!buf) {
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dbg("error kmalloc -> out of mem ?");
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goto cleanup;
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}
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/* 3 */
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ARK3116_SND(serial, 3,0xFE,0x40,0x0008,0x0002);
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ARK3116_SND(serial, 4,0xFE,0x40,0x0008,0x0001);
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ARK3116_SND(serial, 5,0xFE,0x40,0x0000,0x0008);
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ARK3116_SND(serial, 6,0xFE,0x40,0x0000,0x000B);
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/* <-- seq7 */
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ARK3116_RCV(serial, 7,0xFE,0xC0,0x0000,0x0003, 0x00, buf);
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ARK3116_SND(serial, 8,0xFE,0x40,0x0080,0x0003);
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ARK3116_SND(serial, 9,0xFE,0x40,0x001A,0x0000);
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ARK3116_SND(serial,10,0xFE,0x40,0x0000,0x0001);
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ARK3116_SND(serial,11,0xFE,0x40,0x0000,0x0003);
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/* <-- seq12 */
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ARK3116_RCV(serial,12,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
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ARK3116_SND(serial,13,0xFE,0x40,0x0000,0x0004);
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/* 14 */
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ARK3116_RCV(serial,14,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
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ARK3116_SND(serial,15,0xFE,0x40,0x0000,0x0004);
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/* 16 */
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ARK3116_RCV(serial,16,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
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/* --> seq17 */
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ARK3116_SND(serial,17,0xFE,0x40,0x0001,0x0004);
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/* <-- seq18 */
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ARK3116_RCV(serial,18,0xFE,0xC0,0x0000,0x0004, 0x01, buf);
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/* --> seq19 */
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ARK3116_SND(serial,19,0xFE,0x40,0x0003,0x0004);
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/* <-- seq20 */
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/* seems like serial port status info (RTS, CTS,...) */
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/* returns modem control line status ?! */
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ARK3116_RCV(serial,20,0xFE,0xC0,0x0000,0x0006, 0xFF, buf);
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/* set 9600 baud & do some init ?! */
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ARK3116_SND(serial,147,0xFE,0x40,0x0083,0x0003);
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ARK3116_SND(serial,148,0xFE,0x40,0x0038,0x0000);
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ARK3116_SND(serial,149,0xFE,0x40,0x0001,0x0001);
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ARK3116_SND(serial,150,0xFE,0x40,0x0003,0x0003);
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ARK3116_RCV(serial,151,0xFE,0xC0,0x0000,0x0004,0x03, buf);
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ARK3116_SND(serial,152,0xFE,0x40,0x0000,0x0003);
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ARK3116_RCV(serial,153,0xFE,0xC0,0x0000,0x0003,0x00, buf);
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ARK3116_SND(serial,154,0xFE,0x40,0x0003,0x0003);
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kfree(buf);
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return(0);
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cleanup:
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for (--i; i>=0; --i)
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usb_set_serial_port_data(serial->port[i], NULL);
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return -ENOMEM;
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}
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static void ark3116_set_termios(struct usb_serial_port *port,
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struct termios *old_termios)
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{
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struct usb_serial *serial = port->serial;
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struct ark3116_private *priv = usb_get_serial_port_data(port);
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unsigned int cflag = port->tty->termios->c_cflag;
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unsigned long flags;
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int baud;
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int ark3116_baud;
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char *buf;
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char config;
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config = 0;
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dbg("%s - port %d", __FUNCTION__, port->number);
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if ((!port->tty) || (!port->tty->termios)) {
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dbg("%s - no tty structures", __FUNCTION__);
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return;
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}
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spin_lock_irqsave(&priv->lock, flags);
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if (!priv->termios_initialized) {
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*(port->tty->termios) = tty_std_termios;
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port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
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priv->termios_initialized = 1;
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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cflag = port->tty->termios->c_cflag;
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/* check that they really want us to change something: */
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if (old_termios) {
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if ((cflag == old_termios->c_cflag) &&
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(RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
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RELEVANT_IFLAG(old_termios->c_iflag))) {
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dbg("%s - nothing to change...", __FUNCTION__);
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return;
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}
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}
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buf = kmalloc(1, GFP_KERNEL);
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if (!buf) {
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dbg("error kmalloc");
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return;
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}
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/* set data bit count (8/7/6/5) */
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if (cflag & CSIZE){
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switch (cflag & CSIZE){
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case CS5:
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config |= 0x00;
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dbg("setting CS5");
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break;
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case CS6:
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config |= 0x01;
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dbg("setting CS6");
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break;
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case CS7:
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config |= 0x02;
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dbg("setting CS7");
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break;
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default:
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err ("CSIZE was set but not CS5-CS8, using CS8!");
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case CS8:
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config |= 0x03;
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dbg("setting CS8");
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break;
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}
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}
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/* set parity (NONE,EVEN,ODD) */
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if (cflag & PARENB){
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if (cflag & PARODD) {
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config |= 0x08;
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dbg("setting parity to ODD");
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} else {
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config |= 0x18;
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dbg("setting parity to EVEN");
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}
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} else {
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dbg("setting parity to NONE");
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}
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/* SET STOPBIT (1/2) */
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if (cflag & CSTOPB) {
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config |= 0x04;
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dbg ("setting 2 stop bits");
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} else {
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dbg ("setting 1 stop bit");
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}
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/* set baudrate: */
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baud = 0;
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switch (cflag & CBAUD){
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case B0:
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err("can't set 0baud, using 9600 instead");
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break;
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case B75: baud = 75; break;
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case B150: baud = 150; break;
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case B300: baud = 300; break;
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case B600: baud = 600; break;
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case B1200: baud = 1200; break;
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case B1800: baud = 1800; break;
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case B2400: baud = 2400; break;
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case B4800: baud = 4800; break;
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case B9600: baud = 9600; break;
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case B19200: baud = 19200; break;
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case B38400: baud = 38400; break;
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case B57600: baud = 57600; break;
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case B115200: baud = 115200; break;
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case B230400: baud = 230400; break;
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case B460800: baud = 460800; break;
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default:
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dbg("does not support the baudrate requested (fix it)");
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break;
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}
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/* set 9600 as default (if given baudrate is invalid for example) */
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if (baud == 0)
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baud = 9600;
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/*
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* found by try'n'error, be careful, maybe there are other options
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* for multiplicator etc!
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*/
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if (baud == 460800)
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/* strange, for 460800 the formula is wrong
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* (dont use round(), then 9600baud is wrong) */
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ark3116_baud = 7;
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else
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ark3116_baud = 3000000 / baud;
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/* ? */
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ARK3116_RCV(serial,0,0xFE,0xC0,0x0000,0x0003, 0x03, buf);
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/* offset = buf[0]; */
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/* offset = 0x03; */
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/* dbg("using 0x%04X as target for 0x0003:",0x0080+offset); */
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/* set baudrate */
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dbg("setting baudrate to %d (->reg=%d)",baud,ark3116_baud);
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ARK3116_SND(serial,147,0xFE,0x40,0x0083,0x0003);
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ARK3116_SND(serial,148,0xFE,0x40,(ark3116_baud & 0x00FF) ,0x0000);
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ARK3116_SND(serial,149,0xFE,0x40,(ark3116_baud & 0xFF00)>>8,0x0001);
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ARK3116_SND(serial,150,0xFE,0x40,0x0003,0x0003);
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/* ? */
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ARK3116_RCV(serial,151,0xFE,0xC0,0x0000,0x0004,0x03, buf);
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ARK3116_SND(serial,152,0xFE,0x40,0x0000,0x0003);
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/* set data bit count, stop bit count & parity: */
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dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
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ARK3116_RCV(serial,153,0xFE,0xC0,0x0000,0x0003,0x00, buf);
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ARK3116_SND(serial,154,0xFE,0x40,config,0x0003);
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if (cflag & CRTSCTS)
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dbg("CRTSCTS not supported by chipset ?!");
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/* TEST ARK3116_SND(154,0xFE,0x40,0xFFFF, 0x0006); */
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kfree(buf);
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return;
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}
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static int ark3116_open(struct usb_serial_port *port, struct file *filp)
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{
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struct termios tmp_termios;
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struct usb_serial *serial = port->serial;
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char *buf;
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int result = 0;
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dbg("%s - port %d", __FUNCTION__, port->number);
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buf = kmalloc(1, GFP_KERNEL);
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if (!buf) {
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dbg("error kmalloc -> out of mem ?");
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return -ENOMEM;
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}
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result = usb_serial_generic_open(port, filp);
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if (result)
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return result;
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/* open */
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ARK3116_RCV(serial,111,0xFE,0xC0,0x0000,0x0003, 0x02, buf);
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ARK3116_SND(serial,112,0xFE,0x40,0x0082,0x0003);
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ARK3116_SND(serial,113,0xFE,0x40,0x001A,0x0000);
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ARK3116_SND(serial,114,0xFE,0x40,0x0000,0x0001);
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ARK3116_SND(serial,115,0xFE,0x40,0x0002,0x0003);
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|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
dbg("ioctl not supported yet...");
|
||
|
|
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... was 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");
|
||
|
|
|