2006-05-12 12:05:29 -06:00
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/*
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2009-10-28 03:43:25 -06:00
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* Copyright (C) 2009 by Bart Hartgers (bart.hartgers+ark3116@gmail.com)
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* Original version:
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2006-07-18 09:00:52 -06:00
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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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2006-05-12 12:05:29 -06:00
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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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2009-10-28 03:43:25 -06:00
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* Supports full modem status lines, break, hardware flow control. Does not
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* support software flow control, since I do not know how to enable it in hw.
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2006-05-12 12:05:29 -06:00
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*
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2009-10-28 03:43:25 -06:00
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* This driver is a essentially new implementation. I initially dug
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* into the old ark3116.c driver and suddenly realized the ark3116 is
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* a 16450 with a USB interface glued to it. See comments at the
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* bottom of this file.
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2006-05-12 12:05:29 -06:00
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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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2009-10-28 03:43:25 -06:00
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#include <linux/ioctl.h>
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2006-05-12 12:05:29 -06:00
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#include <linux/tty.h>
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2009-10-28 03:43:25 -06:00
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#include <linux/tty_flip.h>
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2006-05-12 12:05:29 -06:00
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#include <linux/module.h>
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#include <linux/usb.h>
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2006-07-11 22:22:58 -06:00
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#include <linux/usb/serial.h>
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2006-07-18 09:00:52 -06:00
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#include <linux/serial.h>
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2009-10-28 03:43:25 -06:00
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#include <linux/serial_reg.h>
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2008-04-29 07:35:39 -06:00
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#include <linux/uaccess.h>
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2009-10-28 03:43:25 -06:00
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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2006-05-12 12:05:29 -06:00
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static int debug;
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2009-10-28 03:43:25 -06:00
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/*
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* Version information
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*/
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#define DRIVER_VERSION "v0.5"
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#define DRIVER_AUTHOR "Bart Hartgers <bart.hartgers+ark3116@gmail.com>"
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#define DRIVER_DESC "USB ARK3116 serial/IrDA driver"
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#define DRIVER_DEV_DESC "ARK3116 RS232/IrDA"
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#define DRIVER_NAME "ark3116"
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/* usb timeout of 1 second */
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#define ARK_TIMEOUT (1*HZ)
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2006-05-12 12:05:29 -06:00
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(0x6547, 0x0232) },
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2009-08-06 17:09:52 -06:00
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{ USB_DEVICE(0x18ec, 0x3118) }, /* USB to IrDA adapter */
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2006-05-12 12:05:29 -06:00
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{ },
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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2009-08-06 17:09:52 -06:00
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static int is_irda(struct usb_serial *serial)
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{
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struct usb_device *dev = serial->dev;
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if (le16_to_cpu(dev->descriptor.idVendor) == 0x18ec &&
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le16_to_cpu(dev->descriptor.idProduct) == 0x3118)
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return 1;
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return 0;
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}
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2009-10-28 03:43:25 -06:00
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struct ark3116_private {
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wait_queue_head_t delta_msr_wait;
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struct async_icount icount;
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int irda; /* 1 for irda device */
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/* protects hw register updates */
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struct mutex hw_lock;
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int quot; /* baudrate divisor */
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__u32 lcr; /* line control register value */
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__u32 hcr; /* handshake control register (0x8)
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* value */
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__u32 mcr; /* modem contol register value */
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/* protects the status values below */
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spinlock_t status_lock;
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__u32 msr; /* modem status register value */
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__u32 lsr; /* line status register value */
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};
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static int ark3116_write_reg(struct usb_serial *serial,
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unsigned reg, __u8 val)
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{
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int result;
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/* 0xfe 0x40 are magic values taken from original driver */
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result = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev, 0),
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0xfe, 0x40, val, reg,
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NULL, 0, ARK_TIMEOUT);
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return result;
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}
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static int ark3116_read_reg(struct usb_serial *serial,
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unsigned reg, unsigned char *buf)
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{
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int result;
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/* 0xfe 0xc0 are magic values taken from original driver */
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result = usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev, 0),
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0xfe, 0xc0, 0, reg,
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buf, 1, ARK_TIMEOUT);
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if (result < 0)
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return result;
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else
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return buf[0];
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}
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2006-05-12 12:05:29 -06:00
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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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2006-07-18 09:00:22 -06:00
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usb_sndctrlpipe(serial->dev, 0),
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2006-05-12 12:05:29 -06:00
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request, requesttype, value, index,
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2006-07-18 09:00:22 -06:00
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NULL, 0x00, 1000);
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dbg("%03d > ok", seq);
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2006-05-12 12:05:29 -06:00
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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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2006-07-18 09:00:22 -06:00
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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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2006-05-12 12:05:29 -06:00
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if (result)
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2007-05-17 09:16:44 -06:00
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dbg("%03d < %d bytes [0x%02X]", seq, result,
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((unsigned char *)buf)[0]);
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2006-05-12 12:05:29 -06:00
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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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2006-07-18 09:00:22 -06:00
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usb_rcvctrlpipe(serial->dev, 0),
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2006-05-12 12:05:29 -06:00
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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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buf = kmalloc(1, GFP_KERNEL);
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if (!buf) {
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2006-07-18 09:00:22 -06:00
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dbg("error kmalloc -> out of mem?");
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2009-09-19 14:13:33 -06:00
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return -ENOMEM;
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2006-05-12 12:05:29 -06:00
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}
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2009-08-06 17:09:52 -06:00
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if (is_irda(serial))
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dbg("IrDA mode");
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2006-05-12 12:05:29 -06:00
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/* 3 */
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2006-07-18 09:00:22 -06:00
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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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2009-08-06 17:09:52 -06:00
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ARK3116_SND(serial, 6, 0xFE, 0x40, is_irda(serial) ? 0x0001 : 0x0000,
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0x000B);
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if (is_irda(serial)) {
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ARK3116_SND(serial, 1001, 0xFE, 0x40, 0x0000, 0x000C);
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ARK3116_SND(serial, 1002, 0xFE, 0x40, 0x0041, 0x000D);
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ARK3116_SND(serial, 1003, 0xFE, 0x40, 0x0001, 0x000A);
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}
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2006-05-12 12:05:29 -06:00
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/* <-- seq7 */
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2006-07-18 09:00:22 -06:00
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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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2006-05-12 12:05:29 -06:00
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/* <-- seq12 */
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2006-07-18 09:00:22 -06:00
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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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2006-05-12 12:05:29 -06:00
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/* 14 */
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2006-07-18 09:00:22 -06:00
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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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2006-05-12 12:05:29 -06:00
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/* 16 */
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2006-07-18 09:00:22 -06:00
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ARK3116_RCV(serial, 16, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
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2006-05-12 12:05:29 -06:00
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/* --> seq17 */
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2006-07-18 09:00:22 -06:00
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ARK3116_SND(serial, 17, 0xFE, 0x40, 0x0001, 0x0004);
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2006-05-12 12:05:29 -06:00
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/* <-- seq18 */
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2006-07-18 09:00:22 -06:00
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ARK3116_RCV(serial, 18, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
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2006-05-12 12:05:29 -06:00
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/* --> seq19 */
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2006-07-18 09:00:22 -06:00
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ARK3116_SND(serial, 19, 0xFE, 0x40, 0x0003, 0x0004);
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2006-05-12 12:05:29 -06:00
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/* <-- seq20 */
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2006-07-18 09:00:22 -06:00
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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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2009-08-06 17:09:52 -06:00
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if (is_irda(serial))
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ARK3116_SND(serial, 1004, 0xFE, 0x40, 0x0000, 0x0009);
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2006-07-18 09:00:22 -06:00
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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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2006-05-12 12:05:29 -06:00
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kfree(buf);
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2006-07-18 09:00:22 -06:00
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return 0;
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2009-09-19 14:13:33 -06:00
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}
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2006-05-12 12:05:29 -06:00
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2009-09-19 14:13:33 -06:00
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static void ark3116_init_termios(struct tty_struct *tty)
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{
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struct ktermios *termios = tty->termios;
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*termios = tty_std_termios;
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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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2006-05-12 12:05:29 -06:00
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}
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2008-07-22 04:09:07 -06:00
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static void ark3116_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port,
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2006-12-08 03:38:45 -07:00
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struct ktermios *old_termios)
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2006-05-12 12:05:29 -06:00
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{
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struct usb_serial *serial = port->serial;
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2008-07-22 04:09:07 -06:00
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struct ktermios *termios = tty->termios;
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2007-10-18 02:24:17 -06:00
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unsigned int cflag = termios->c_cflag;
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2006-05-12 12:05:29 -06:00
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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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2008-03-03 17:08:34 -07:00
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dbg("%s - port %d", __func__, port->number);
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2006-05-12 12:05:29 -06:00
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2007-10-18 02:24:17 -06:00
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cflag = termios->c_cflag;
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termios->c_cflag &= ~(CMSPAR|CRTSCTS);
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2006-05-12 12:05:29 -06:00
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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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2008-07-22 04:09:07 -06:00
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*termios = *old_termios;
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2006-05-12 12:05:29 -06:00
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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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2006-07-18 09:00:22 -06:00
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if (cflag & CSIZE) {
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switch (cflag & CSIZE) {
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2006-05-12 12:05:29 -06:00
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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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2007-06-22 07:36:29 -06:00
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dbg("CSIZE was set but not CS5-CS8, using CS8!");
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2006-07-18 09:00:22 -06:00
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/* fall through */
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2006-05-12 12:05:29 -06:00
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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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2006-07-18 09:00:22 -06:00
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/* set parity (NONE/EVEN/ODD) */
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if (cflag & PARENB) {
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2006-05-12 12:05:29 -06:00
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if (cflag & PARODD) {
|
|
|
|
config |= 0x08;
|
|
|
|
dbg("setting parity to ODD");
|
|
|
|
} else {
|
|
|
|
config |= 0x18;
|
|
|
|
dbg("setting parity to EVEN");
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
dbg("setting parity to NONE");
|
|
|
|
}
|
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* set stop bit (1/2) */
|
2006-05-12 12:05:29 -06:00
|
|
|
if (cflag & CSTOPB) {
|
|
|
|
config |= 0x04;
|
2006-07-18 09:00:22 -06:00
|
|
|
dbg("setting 2 stop bits");
|
2006-05-12 12:05:29 -06:00
|
|
|
} else {
|
2006-07-18 09:00:22 -06:00
|
|
|
dbg("setting 1 stop bit");
|
2006-05-12 12:05:29 -06:00
|
|
|
}
|
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* set baudrate */
|
2008-07-22 04:09:07 -06:00
|
|
|
baud = tty_get_baud_rate(tty);
|
2007-06-22 07:36:29 -06:00
|
|
|
|
|
|
|
switch (baud) {
|
2008-04-29 07:35:39 -06:00
|
|
|
case 75:
|
|
|
|
case 150:
|
|
|
|
case 300:
|
|
|
|
case 600:
|
|
|
|
case 1200:
|
|
|
|
case 1800:
|
|
|
|
case 2400:
|
|
|
|
case 4800:
|
|
|
|
case 9600:
|
|
|
|
case 19200:
|
|
|
|
case 38400:
|
|
|
|
case 57600:
|
|
|
|
case 115200:
|
|
|
|
case 230400:
|
|
|
|
case 460800:
|
|
|
|
/* Report the resulting rate back to the caller */
|
2008-07-22 04:09:07 -06:00
|
|
|
tty_encode_baud_rate(tty, baud, baud);
|
2008-04-29 07:35:39 -06:00
|
|
|
break;
|
|
|
|
/* set 9600 as default (if given baudrate is invalid for example) */
|
|
|
|
default:
|
2008-07-22 04:09:07 -06:00
|
|
|
tty_encode_baud_rate(tty, 9600, 9600);
|
2008-04-29 07:35:39 -06:00
|
|
|
case 0:
|
|
|
|
baud = 9600;
|
2006-05-12 12:05:29 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* found by try'n'error, be careful, maybe there are other options
|
2007-06-22 07:36:29 -06:00
|
|
|
* for multiplicator etc! (3.5 for example)
|
2006-05-12 12:05:29 -06:00
|
|
|
*/
|
|
|
|
if (baud == 460800)
|
|
|
|
/* strange, for 460800 the formula is wrong
|
2006-07-18 09:00:22 -06:00
|
|
|
* if using round() then 9600baud is wrong) */
|
2006-05-12 12:05:29 -06:00
|
|
|
ark3116_baud = 7;
|
|
|
|
else
|
|
|
|
ark3116_baud = 3000000 / baud;
|
|
|
|
|
|
|
|
/* ? */
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
|
|
|
|
|
2006-05-12 12:05:29 -06:00
|
|
|
/* offset = buf[0]; */
|
|
|
|
/* offset = 0x03; */
|
2006-07-18 09:00:22 -06:00
|
|
|
/* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
|
2006-05-12 12:05:29 -06:00
|
|
|
|
|
|
|
/* set baudrate */
|
2006-07-18 09:00:22 -06:00
|
|
|
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);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
|
|
|
/* ? */
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
|
|
|
|
ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
|
|
|
/* set data bit count, stop bit count & parity: */
|
|
|
|
dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
|
|
|
|
ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
|
|
|
if (cflag & CRTSCTS)
|
2006-07-18 09:00:22 -06:00
|
|
|
dbg("CRTSCTS not supported by chipset?!");
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
|
2006-05-12 12:05:29 -06:00
|
|
|
|
|
|
|
kfree(buf);
|
2007-10-18 02:24:17 -06:00
|
|
|
|
2006-05-12 12:05:29 -06:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2009-09-19 14:13:26 -06:00
|
|
|
static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
|
2006-05-12 12:05:29 -06:00
|
|
|
{
|
2006-12-08 03:38:45 -07:00
|
|
|
struct ktermios tmp_termios;
|
2006-05-12 12:05:29 -06:00
|
|
|
struct usb_serial *serial = port->serial;
|
|
|
|
char *buf;
|
|
|
|
int result = 0;
|
|
|
|
|
2008-03-03 17:08:34 -07:00
|
|
|
dbg("%s - port %d", __func__, port->number);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
|
|
|
buf = kmalloc(1, GFP_KERNEL);
|
|
|
|
if (!buf) {
|
2006-07-18 09:00:22 -06:00
|
|
|
dbg("error kmalloc -> out of mem?");
|
2006-05-12 12:05:29 -06:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2009-09-19 14:13:26 -06:00
|
|
|
result = usb_serial_generic_open(tty, port);
|
2006-05-12 12:05:29 -06:00
|
|
|
if (result)
|
2007-03-26 10:12:44 -06:00
|
|
|
goto err_out;
|
2006-05-12 12:05:29 -06:00
|
|
|
|
|
|
|
/* open */
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 111, 0xFE, 0xC0, 0x0000, 0x0003, 0x02, buf);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
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);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 116, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
|
|
|
|
ARK3116_SND(serial, 117, 0xFE, 0x40, 0x0002, 0x0004);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 118, 0xFE, 0xC0, 0x0000, 0x0004, 0x02, buf);
|
|
|
|
ARK3116_SND(serial, 119, 0xFE, 0x40, 0x0000, 0x0004);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 120, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* returns different values (control lines?!) */
|
|
|
|
ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* initialise termios */
|
2008-07-22 04:09:07 -06:00
|
|
|
if (tty)
|
|
|
|
ark3116_set_termios(tty, port, &tmp_termios);
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2007-03-26 10:12:44 -06:00
|
|
|
err_out:
|
2006-05-12 12:05:29 -06:00
|
|
|
kfree(buf);
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
2008-07-22 04:09:07 -06:00
|
|
|
static int ark3116_ioctl(struct tty_struct *tty, struct file *file,
|
2006-05-12 12:05:29 -06:00
|
|
|
unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
2008-07-22 04:09:07 -06:00
|
|
|
struct usb_serial_port *port = tty->driver_data;
|
2006-07-18 09:00:52 -06:00
|
|
|
struct serial_struct serstruct;
|
|
|
|
void __user *user_arg = (void __user *)arg;
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case TIOCGSERIAL:
|
|
|
|
/* XXX: Some of these values are probably wrong. */
|
2008-04-29 07:35:39 -06:00
|
|
|
memset(&serstruct, 0, sizeof(serstruct));
|
2006-07-18 09:00:52 -06:00
|
|
|
serstruct.type = PORT_16654;
|
|
|
|
serstruct.line = port->serial->minor;
|
|
|
|
serstruct.port = port->number;
|
|
|
|
serstruct.custom_divisor = 0;
|
|
|
|
serstruct.baud_base = 460800;
|
|
|
|
|
2008-04-29 07:35:39 -06:00
|
|
|
if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
|
2006-07-18 09:00:52 -06:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
case TIOCSSERIAL:
|
2008-04-29 07:35:39 -06:00
|
|
|
if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
|
2006-07-18 09:00:52 -06:00
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
default:
|
2008-03-03 17:08:34 -07:00
|
|
|
dbg("%s cmd 0x%04x not supported", __func__, cmd);
|
2006-07-18 09:00:52 -06:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2006-05-12 12:05:29 -06:00
|
|
|
return -ENOIOCTLCMD;
|
|
|
|
}
|
|
|
|
|
2008-07-22 04:09:07 -06:00
|
|
|
static int ark3116_tiocmget(struct tty_struct *tty, struct file *file)
|
2006-05-12 12:05:29 -06:00
|
|
|
{
|
2008-07-22 04:09:07 -06:00
|
|
|
struct usb_serial_port *port = tty->driver_data;
|
2006-05-12 12:05:29 -06:00
|
|
|
struct usb_serial *serial = port->serial;
|
|
|
|
char *buf;
|
|
|
|
char temp;
|
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* seems like serial port status info (RTS, CTS, ...) is stored
|
2006-05-12 12:05:29 -06:00
|
|
|
* 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;
|
|
|
|
}
|
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* read register */
|
|
|
|
ARK3116_RCV_QUIET(serial, 0xFE, 0xC0, 0x0000, 0x0006, buf);
|
2006-05-12 12:05:29 -06:00
|
|
|
temp = buf[0];
|
|
|
|
kfree(buf);
|
|
|
|
|
2006-07-18 09:00:22 -06:00
|
|
|
/* i do not really know if bit4=CTS and bit6=DSR... just a
|
|
|
|
* quick guess!
|
2006-05-12 12:05:29 -06:00
|
|
|
*/
|
2006-07-18 09:00:22 -06:00
|
|
|
return (temp & (1<<4) ? TIOCM_CTS : 0)
|
|
|
|
| (temp & (1<<6) ? TIOCM_DSR : 0);
|
2006-05-12 12:05:29 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct usb_driver ark3116_driver = {
|
|
|
|
.name = "ark3116",
|
|
|
|
.probe = usb_serial_probe,
|
|
|
|
.disconnect = usb_serial_disconnect,
|
|
|
|
.id_table = id_table,
|
2006-12-17 13:50:24 -07:00
|
|
|
.no_dynamic_id = 1,
|
2006-05-12 12:05:29 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
static struct usb_serial_driver ark3116_device = {
|
|
|
|
.driver = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = "ark3116",
|
|
|
|
},
|
|
|
|
.id_table = id_table,
|
2006-12-17 13:50:24 -07:00
|
|
|
.usb_driver = &ark3116_driver,
|
2006-05-12 12:05:29 -06:00
|
|
|
.num_ports = 1,
|
|
|
|
.attach = ark3116_attach,
|
|
|
|
.set_termios = ark3116_set_termios,
|
2009-09-19 14:13:33 -06:00
|
|
|
.init_termios = ark3116_init_termios,
|
2006-05-12 12:05:29 -06:00
|
|
|
.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);
|
2009-10-28 03:43:25 -06:00
|
|
|
if (retval == 0) {
|
|
|
|
printk(KERN_INFO "%s:"
|
|
|
|
DRIVER_VERSION ":"
|
|
|
|
DRIVER_DESC "\n",
|
|
|
|
KBUILD_MODNAME);
|
|
|
|
} else
|
2006-05-12 12:05:29 -06:00
|
|
|
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");
|
|
|
|
|
2009-10-28 03:43:25 -06:00
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
|
|
|
2006-05-12 12:05:29 -06:00
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
2009-10-28 03:43:25 -06:00
|
|
|
MODULE_PARM_DESC(debug, "Enable debug");
|
2006-05-12 12:05:29 -06:00
|
|
|
|
2009-10-28 03:43:25 -06:00
|
|
|
/*
|
|
|
|
* The following describes what I learned from studying the old
|
|
|
|
* ark3116.c driver, disassembling the windows driver, and some lucky
|
|
|
|
* guesses. Since I do not have any datasheet or other
|
|
|
|
* documentation, inaccuracies are almost guaranteed.
|
|
|
|
*
|
|
|
|
* Some specs for the ARK3116 can be found here:
|
|
|
|
* http://web.archive.org/web/20060318000438/
|
|
|
|
* www.arkmicro.com/en/products/view.php?id=10
|
|
|
|
* On that page, 2 GPIO pins are mentioned: I assume these are the
|
|
|
|
* OUT1 and OUT2 pins of the UART, so I added support for those
|
|
|
|
* through the MCR. Since the pins are not available on my hardware,
|
|
|
|
* I could not verify this.
|
|
|
|
* Also, it states there is "on-chip hardware flow control". I have
|
|
|
|
* discovered how to enable that. Unfortunately, I do not know how to
|
|
|
|
* enable XON/XOFF (software) flow control, which would need support
|
|
|
|
* from the chip as well to work. Because of the wording on the web
|
|
|
|
* page there is a real possibility the chip simply does not support
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* software flow control.
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*
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* I got my ark3116 as part of a mobile phone adapter cable. On the
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* PCB, the following numbered contacts are present:
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*
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* 1:- +5V
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* 2:o DTR
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* 3:i RX
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* 4:i DCD
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* 5:o RTS
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* 6:o TX
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* 7:i RI
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* 8:i DSR
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* 10:- 0V
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* 11:i CTS
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*
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* On my chip, all signals seem to be 3.3V, but 5V tolerant. But that
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* may be different for the one you have ;-).
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*
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* The windows driver limits the registers to 0-F, so I assume there
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* are actually 16 present on the device.
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*
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* On an UART interrupt, 4 bytes of data come in on the interrupt
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* endpoint. The bytes are 0xe8 IIR LSR MSR.
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*
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* The baudrate seems to be generated from the 12MHz crystal, using
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* 4-times subsampling. So quot=12e6/(4*baud). Also see description
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* of register E.
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*
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* Registers 0-7:
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* These seem to be the same as for a regular 16450. The FCR is set
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* to UART_FCR_DMA_SELECT (0x8), I guess to enable transfers between
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* the UART and the USB bridge/DMA engine.
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*
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* Register 8:
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* By trial and error, I found out that bit 0 enables hardware CTS,
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* stopping TX when CTS is +5V. Bit 1 does the same for RTS, making
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* RTS +5V when the 3116 cannot transfer the data to the USB bus
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* (verified by disabling the reading URB). Note that as far as I can
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* tell, the windows driver does NOT use this, so there might be some
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* hardware bug or something.
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*
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* According to a patch provided here
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* (http://lkml.org/lkml/2009/7/26/56), the ARK3116 can also be used
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* as an IrDA dongle. Since I do not have such a thing, I could not
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* investigate that aspect. However, I can speculate ;-).
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*
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* - IrDA encodes data differently than RS232. Most likely, one of
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* the bits in registers 9..E enables the IR ENDEC (encoder/decoder).
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* - Depending on the IR transceiver, the input and output need to be
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* inverted, so there are probably bits for that as well.
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* - IrDA is half-duplex, so there should be a bit for selecting that.
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*
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* This still leaves at least two registers unaccounted for. Perhaps
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* The chip can do XON/XOFF or CRC in HW?
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*
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* Register 9:
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* Set to 0x00 for IrDA, when the baudrate is initialised.
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*
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* Register A:
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* Set to 0x01 for IrDA, at init.
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*
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* Register B:
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* Set to 0x01 for IrDA, 0x00 for RS232, at init.
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*
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* Register C:
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* Set to 00 for IrDA, at init.
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*
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* Register D:
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* Set to 0x41 for IrDA, at init.
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*
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* Register E:
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* Somekind of baudrate override. The windows driver seems to set
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* this to 0x00 for normal baudrates, 0x01 for 460800, 0x02 for 921600.
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* Since 460800 and 921600 cannot be obtained by dividing 3MHz by an integer,
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* it could be somekind of subdivisor thingy.
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* However,it does not seem to do anything: selecting 921600 (divisor 3,
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* reg E=2), still gets 1 MHz. I also checked if registers 9, C or F would
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* work, but they don't.
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*
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* Register F: unknown
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*/
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