kobil_sct.c

优龙2410linux2.6.8内核源代码

		  kfree(dbg_data);
		*/
		// END DEBUG

		for (i = 0; i < purb->actual_length; ++i) {
			// if we insert more than TTY_FLIPBUF_SIZE characters, we drop them.
			if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
				tty_flip_buffer_push(tty);
			}
			// this doesn't actually push the data through unless tty->low_latency is set
			tty_insert_flip_char(tty, data[i], 0);
		}
		tty_flip_buffer_push(tty);
	}

	// someone sets the dev to 0 if the close method has been called
	port->interrupt_in_urb->dev = port->serial->dev;

	result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC ); 
	dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
}


static void kobil_write_callback( struct urb *purb, struct pt_regs *regs )
{
}


static int kobil_write (struct usb_serial_port *port, int from_user, 
			const unsigned char *buf, int count)
{
	int length = 0;
	int result = 0;
	int todo = 0;
	struct kobil_private * priv;

	if (count == 0) {
		dbg("%s - port %d write request of 0 bytes", __FUNCTION__, port->number);
		return 0;
	}

	priv = usb_get_serial_port_data(port);

	if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
		dbg("%s - port %d Error: write request bigger than buffer size", __FUNCTION__, port->number);
		return -ENOMEM;
	}

	// Copy data to buffer
	if (from_user) {
		if (copy_from_user(priv->buf + priv->filled, buf, count)) {
			return -EFAULT;
		}
	} else {
		memcpy (priv->buf + priv->filled, buf, count);
	}

	usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, priv->buf + priv->filled);

	priv->filled = priv->filled + count;


	// only send complete block. TWIN, KAAN SIM and adapter K use the same protocol.
	if ( ((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) || 
	     ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4))) ) {
		
		// stop reading (except TWIN and KAAN SIM)
		if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) ) {
			usb_unlink_urb( port->interrupt_in_urb );
		}

		todo = priv->filled - priv->cur_pos;

		while(todo > 0) {
			// max 8 byte in one urb (endpoint size)
			length = (todo < 8) ? todo : 8;
			// copy data to transfer buffer
			memcpy(port->write_urb->transfer_buffer, priv->buf + priv->cur_pos, length );
			usb_fill_int_urb( port->write_urb,
					  port->serial->dev,
					  usb_sndintpipe(port->serial->dev, priv->write_int_endpoint_address),
					  port->write_urb->transfer_buffer,
					  length,
					  kobil_write_callback,
					  port,
					  8
				);

			priv->cur_pos = priv->cur_pos + length;
			result = usb_submit_urb( port->write_urb, GFP_NOIO );
			dbg("%s - port %d Send write URB returns: %i", __FUNCTION__, port->number, result);
			todo = priv->filled - priv->cur_pos;

			if (todo > 0) {
				msleep(24);
			}

		} // end while
		
		priv->filled = 0;
		priv->cur_pos = 0;

		// someone sets the dev to 0 if the close method has been called
		port->interrupt_in_urb->dev = port->serial->dev;
		
		// start reading (except TWIN and KAAN SIM)
		if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) ) {
			// someone sets the dev to 0 if the close method has been called
			port->interrupt_in_urb->dev = port->serial->dev;
			
			result = usb_submit_urb( port->interrupt_in_urb, GFP_NOIO ); 
			dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
		}
	}
	return count;
}


static int kobil_write_room (struct usb_serial_port *port)
{
	//dbg("%s - port %d", __FUNCTION__, port->number);
	return 8;
}


static int kobil_tiocmget(struct usb_serial_port *port, struct file *file)
{
	struct kobil_private * priv;
	int result;
	unsigned char *transfer_buffer;
	int transfer_buffer_length = 8;

	priv = usb_get_serial_port_data(port);
	if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
		// This device doesn't support ioctl calls
		return -EINVAL;
	}

	// allocate memory for transfer buffer
	transfer_buffer = (unsigned char *) kmalloc(transfer_buffer_length, GFP_KERNEL);  
	if (!transfer_buffer) {
		return -ENOMEM;
	}
	memset(transfer_buffer, 0, transfer_buffer_length);

	result = usb_control_msg( port->serial->dev, 
				  usb_rcvctrlpipe(port->serial->dev, 0 ), 
				  SUSBCRequest_GetStatusLineState,
				  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
				  0,
				  0,
				  transfer_buffer,
				  transfer_buffer_length,
				  KOBIL_TIMEOUT);

	dbg("%s - port %d Send get_status_line_state URB returns: %i. Statusline: %02x", 
	    __FUNCTION__, port->number, result, transfer_buffer[0]);

	if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0) {
		priv->line_state |= TIOCM_DSR;
	} else {
		priv->line_state &= ~TIOCM_DSR; 
	}

	kfree(transfer_buffer);
	return priv->line_state;
}

static int  kobil_tiocmset(struct usb_serial_port *port, struct file *file,
			   unsigned int set, unsigned int clear)
{
	struct kobil_private * priv;
	int result;
	int dtr = 0;
	int rts = 0;
	unsigned char *transfer_buffer;
	int transfer_buffer_length = 8;

	priv = usb_get_serial_port_data(port);
	if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
		// This device doesn't support ioctl calls
		return -EINVAL;
	}

	// allocate memory for transfer buffer
	transfer_buffer = (unsigned char *) kmalloc(transfer_buffer_length, GFP_KERNEL);
	if (! transfer_buffer) {
		return -ENOMEM;
	}
	memset(transfer_buffer, 0, transfer_buffer_length);

	if (set & TIOCM_RTS)
		rts = 1;
	if (set & TIOCM_DTR)
		dtr = 1;
	if (clear & TIOCM_RTS)
		rts = 0;
	if (clear & TIOCM_DTR)
		dtr = 0;

	if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
		if (dtr != 0)
			dbg("%s - port %d Setting DTR", __FUNCTION__, port->number);
		else
			dbg("%s - port %d Clearing DTR", __FUNCTION__, port->number);
		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_SetStatusLinesOrQueues,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
					  0,
					  transfer_buffer,
					  0,
					  KOBIL_TIMEOUT);
	} else {
		if (rts != 0)
			dbg("%s - port %d Setting RTS", __FUNCTION__, port->number);
		else
			dbg("%s - port %d Clearing RTS", __FUNCTION__, port->number);
		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_SetStatusLinesOrQueues,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
					  0,
					  transfer_buffer,
					  0,
					  KOBIL_TIMEOUT);
	}
	dbg("%s - port %d Send set_status_line URB returns: %i", __FUNCTION__, port->number, result);
	kfree(transfer_buffer);
	return (result < 0) ? result : 0;
}


static int  kobil_ioctl(struct usb_serial_port *port, struct file *file,
			unsigned int cmd, unsigned long arg)
{
	struct kobil_private * priv;
	int result;
	unsigned short urb_val = 0;
	unsigned char *transfer_buffer;
	int transfer_buffer_length = 8;
	char *settings;
	void __user *user_arg = (void __user *)arg;

	priv = usb_get_serial_port_data(port);
	if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
		// This device doesn't support ioctl calls
		return 0;
	}

	switch (cmd) {
	case TCGETS:   // 0x5401
		result = verify_area(VERIFY_WRITE, user_arg, sizeof(struct termios));
		if (result) {
			dbg("%s - port %d Error in verify_area", __FUNCTION__, port->number);
			return(result);
		}
		if (kernel_termios_to_user_termios((struct termios __user *)arg,
						   &priv->internal_termios))
			return -EFAULT;
		return 0;

	case TCSETS:   // 0x5402
		if (!(port->tty->termios)) {
			dbg("%s - port %d Error: port->tty->termios is NULL", __FUNCTION__, port->number);
			return -ENOTTY;
		}
		result = verify_area(VERIFY_READ, user_arg, sizeof(struct termios));
		if (result) {
			dbg("%s - port %d Error in verify_area", __FUNCTION__, port->number);
			return result;
		}
		if (user_termios_to_kernel_termios(&priv->internal_termios,
						   (struct termios __user *)arg))
			return -EFAULT;
		
		settings = (unsigned char *) kmalloc(50, GFP_KERNEL);  
		if (! settings) {
			return -ENOBUFS;
		}
		memset(settings, 0, 50);

		switch (priv->internal_termios.c_cflag & CBAUD) {
		case B1200:
			urb_val = SUSBCR_SBR_1200;
			strcat(settings, "1200 ");
			break;
		case B9600:
		default:
			urb_val = SUSBCR_SBR_9600;
			strcat(settings, "9600 ");
			break;
		}

		urb_val |= (priv->internal_termios.c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits : SUSBCR_SPASB_1StopBit;
		strcat(settings, (priv->internal_termios.c_cflag & CSTOPB) ? "2 StopBits " : "1 StopBit ");

		if (priv->internal_termios.c_cflag & PARENB) {
			if  (priv->internal_termios.c_cflag & PARODD) {
				urb_val |= SUSBCR_SPASB_OddParity;
				strcat(settings, "Odd Parity");
			} else {
				urb_val |= SUSBCR_SPASB_EvenParity;
				strcat(settings, "Even Parity");
			}
		} else {
			urb_val |= SUSBCR_SPASB_NoParity;
			strcat(settings, "No Parity");
		}
		dbg("%s - port %d setting port to: %s", __FUNCTION__, port->number, settings );

		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_SetBaudRateParityAndStopBits,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  urb_val,
					  0,
					  settings,
					  0,
					  KOBIL_TIMEOUT
			);

		dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
		kfree(settings);
		return 0;

	case TCFLSH:   // 0x540B
		transfer_buffer = (unsigned char *) kmalloc(transfer_buffer_length, GFP_KERNEL);
		if (! transfer_buffer) {
		 	return -ENOBUFS;
		}

		result = usb_control_msg( port->serial->dev, 
		 			  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_Misc,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  SUSBCR_MSC_ResetAllQueues,
					  0,
					  NULL,//transfer_buffer,
					  0,
					  KOBIL_TIMEOUT
			);
		
		dbg("%s - port %d Send reset_all_queues (FLUSH) URB returns: %i", __FUNCTION__, port->number, result);

		kfree(transfer_buffer);
		return ((result < 0) ? -EFAULT : 0);

	}
	return -ENOIOCTLCMD;
}


static int __init kobil_init (void)
{
	int retval;
	retval = usb_serial_register(&kobil_device);
	if (retval)
		goto failed_usb_serial_register;
	retval = usb_register(&kobil_driver);
	if (retval) 
		goto failed_usb_register;

	info(DRIVER_VERSION " " DRIVER_AUTHOR);
	info(DRIVER_DESC);

	return 0;
failed_usb_register:
	usb_serial_deregister(&kobil_device);
failed_usb_serial_register:
	return retval;
}


static void __exit kobil_exit (void)
{
	usb_deregister (&kobil_driver);
	usb_serial_deregister (&kobil_device);
}

module_init(kobil_init);
module_exit(kobil_exit);

MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE( "GPL" );

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");