485 lines
12 KiB
C
485 lines
12 KiB
C
/*
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* Copyright (C) 2006
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* Simon Schulz (ark3116_driver <at> auctionant.de)
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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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* 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 <linux/usb/serial.h>
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#include <linux/serial.h>
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#include <linux/uaccess.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,
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((unsigned char *)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 = kzalloc(sizeof(struct ark3116_private), GFP_KERNEL);
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if (!priv)
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goto cleanup;
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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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kfree(usb_get_serial_port_data(serial->port[i]));
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usb_set_serial_port_data(serial->port[i], NULL);
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}
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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 ktermios *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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struct ktermios *termios = port->tty->termios;
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unsigned int cflag = 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", __func__, port->number);
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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
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| CREAD | HUPCL | CLOCAL;
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termios->c_ispeed = 9600;
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termios->c_ospeed = 9600;
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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 = termios->c_cflag;
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termios->c_cflag &= ~(CMSPAR|CRTSCTS);
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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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*port->tty->termios = *old_termios;
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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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dbg("CSIZE was set but not CS5-CS8, using CS8!");
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/* fall through */
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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 stop bit (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 = tty_get_baud_rate(port->tty);
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switch (baud) {
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case 75:
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case 150:
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case 300:
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case 600:
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case 1200:
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case 1800:
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case 2400:
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case 4800:
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case 9600:
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case 19200:
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case 38400:
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case 57600:
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case 115200:
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case 230400:
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case 460800:
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/* Report the resulting rate back to the caller */
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tty_encode_baud_rate(port->tty, baud, baud);
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break;
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/* set 9600 as default (if given baudrate is invalid for example) */
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default:
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tty_encode_baud_rate(port->tty, 9600, 9600);
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case 0:
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baud = 9600;
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}
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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! (3.5 for example)
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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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* if using 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,
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(ark3116_baud & 0x00FF), 0x0000);
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ARK3116_SND(serial, 149, 0xFE, 0x40,
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(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 ktermios 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", __func__, 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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goto err_out;
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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);
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ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
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ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
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ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
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ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
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ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
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ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
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ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
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/* returns different values (control lines?!) */
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ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
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/* initialise termios */
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if (port->tty)
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ark3116_set_termios(port, &tmp_termios);
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err_out:
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kfree(buf);
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return result;
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}
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static int ark3116_ioctl(struct usb_serial_port *port, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct serial_struct serstruct;
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void __user *user_arg = (void __user *)arg;
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switch (cmd) {
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case TIOCGSERIAL:
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/* XXX: Some of these values are probably wrong. */
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memset(&serstruct, 0, sizeof(serstruct));
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serstruct.type = PORT_16654;
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serstruct.line = port->serial->minor;
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serstruct.port = port->number;
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serstruct.custom_divisor = 0;
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serstruct.baud_base = 460800;
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if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
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return -EFAULT;
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return 0;
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case TIOCSSERIAL:
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if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
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return -EFAULT;
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return 0;
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default:
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dbg("%s cmd 0x%04x not supported", __func__, cmd);
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break;
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}
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return -ENOIOCTLCMD;
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}
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static int ark3116_tiocmget(struct usb_serial_port *port, struct file *file)
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{
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struct usb_serial *serial = port->serial;
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char *buf;
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char temp;
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/* seems like serial port status info (RTS, CTS, ...) is stored
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* in reg(?) 0x0006
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* pcb connection point 11 = GND -> sets bit4 of response
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* pcb connection point 7 = GND -> sets bit6 of response
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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 -ENOMEM;
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}
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/* read register */
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ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
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temp = buf[0];
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kfree(buf);
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/* i do not really know if bit4=CTS and bit6=DSR... just a
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* quick guess!
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*/
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return (temp & (1<<4) ? TIOCM_CTS : 0)
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| (temp & (1<<6) ? TIOCM_DSR : 0);
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}
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static struct usb_driver ark3116_driver = {
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.name = "ark3116",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table,
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.no_dynamic_id = 1,
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};
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static struct usb_serial_driver ark3116_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "ark3116",
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},
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.id_table = id_table,
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.usb_driver = &ark3116_driver,
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.num_ports = 1,
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.attach = ark3116_attach,
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.set_termios = ark3116_set_termios,
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.ioctl = ark3116_ioctl,
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.tiocmget = ark3116_tiocmget,
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.open = ark3116_open,
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};
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static int __init ark3116_init(void)
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{
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int retval;
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retval = usb_serial_register(&ark3116_device);
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if (retval)
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return retval;
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retval = usb_register(&ark3116_driver);
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if (retval)
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usb_serial_deregister(&ark3116_device);
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return retval;
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}
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static void __exit ark3116_exit(void)
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{
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usb_deregister(&ark3116_driver);
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usb_serial_deregister(&ark3116_device);
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}
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module_init(ark3116_init);
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module_exit(ark3116_exit);
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MODULE_LICENSE("GPL");
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module_param(debug, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "Debug enabled or not");
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