patch-2.3.22 linux/drivers/usb/serial.c

• Lines: 692
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.21/linux/drivers/usb/serial.c
• Orig date: Sat Oct 9 11:47:50 1999

diff -u --recursive --new-file v2.3.21/linux/drivers/usb/serial.c linux/drivers/usb/serial.c
@@ -1,691 +0,0 @@
-/*
- * USB Serial Converter driver
- *
- * Greg Kroah-Hartman (greg@kroah.com)
- *
- * This was based on the ACM driver by Armin Fuerst (which was based
- * on a driver by Brad Keryan)
- *
- * Currently only works for the Belkin and Peracom Serial converters.
- * Should also work on the Etek serial converter, if anyone knows the
- * vendor and device ids for that device.
- *
- * 
- * version 0.1.1 (10/05/99) gkh
- *  Changed the major number to not conflict with anything else.
- *
- * version 0.1 (09/28/99) gkh
- *  Can recognize the two different devices and start up a read from
- * device when asked to. Writes also work. No control signals yet, this
- * all is vendor specific data (i.e. no spec), also no control for
- * different baud rates or other bit settings.
- * Currently we are using the same devid as the acm driver. This needs
- * to change.
- * 
- * (C) Copyright 1999 Greg Kroah-Hartman (greg@kroah.com)
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/poll.h>
-#include <linux/init.h>
-#include <linux/malloc.h>
-#include <linux/fcntl.h>
-#include <linux/tty_driver.h>
-#include <linux/tty_flip.h>
-#include <linux/tty.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-
-
-#include "usb.h"
-/*#define SERIAL_DEBUG 1*/
-
-#ifdef SERIAL_DEBUG
-	#define debug_info(message); printk(message);
-#else
-	#define debug_info(message);
-#endif
-
-
-/* USB Serial devices vendor ids and device ids that this driver supports */
-#define BELKIN_VENDOR_ID		0x056c
-#define BELKIN_SERIAL_CONVERTER		0x8007
-#define PERACOM_VENDOR_ID		0x0565
-#define PERACOM_SERIAL_CONVERTER	0x0001
-
-
-#define SERIAL_MAJOR	240
-
-#define NUM_PORTS	4	/* Have to pick a number for now. Need to look */
-				/* into dynamically creating them at insertion time. */
-
-
-static int usb_serial_probe(struct usb_device *dev);
-static void usb_serial_disconnect(struct usb_device *dev);
-
-typedef enum {
-	unknown = 0,
-	Belkin = 1,
-	Peracom = 2
-	} SERIAL_TYPE;
-
-struct usb_serial_state {
-	struct usb_device *	dev;
-	SERIAL_TYPE		type;		/* what manufacturer's type of converter */
-	void *			irq_handle;
-	unsigned int		irqpipe;
-	struct tty_struct	*tty;		/* the coresponding tty for this device */
-	char			present;
-	char			active;
-
-	char			interrupt_in_inuse;
-	__u8			interrupt_in_endpoint;
-	__u8			interrupt_in_interval;
-	__u16			interrupt_in_size;
-	unsigned int		interrupt_in_pipe;
-	unsigned char *		interrupt_in_buffer;
-	void *			interrupt_in_transfer;
-
-	char			bulk_in_inuse;
-	__u8			bulk_in_endpoint;
-	__u8			bulk_in_interval;
-	__u16			bulk_in_size;
-	unsigned int		bulk_in_pipe;
-	unsigned char *		bulk_in_buffer;
-	void *			bulk_in_transfer;
-
-	char			bulk_out_inuse;
-	__u8			bulk_out_endpoint;
-	__u8			bulk_out_interval;
-	__u16			bulk_out_size;
-	unsigned int		bulk_out_pipe;
-	unsigned char *		bulk_out_buffer;
-	void *			bulk_out_transfer;
-};
-
-static struct usb_driver usb_serial_driver = {
-	"serial",
-	usb_serial_probe,
-	usb_serial_disconnect,
-	{ NULL, NULL }
-};
-
-static int			serial_refcount;
-static struct tty_driver 	serial_tty_driver;
-static struct tty_struct *	serial_tty[NUM_PORTS];
-static struct termios *		serial_termios[NUM_PORTS];
-static struct termios *		serial_termios_locked[NUM_PORTS];
-static struct usb_serial_state	serial_state_table[NUM_PORTS];
-
-
-
-static int serial_read_irq (int state, void *buffer, int count, void *dev_id)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *)dev_id;
-       	struct tty_struct *tty = serial->tty; 
-       	unsigned char* data = buffer;
-	int i;
-
-	debug_info("USB: serial_read_irq\n");
-
-#ifdef SERIAL_DEBUG
-	if (count) {
-		printk("%d %s\n", count, data);
-	}
-#endif
-
-	if (count) {
-		for (i=0;i<count;i++) {
-			 tty_insert_flip_char(tty,data[i],0);
-	  	}
-	  	tty_flip_buffer_push(tty);
-	}
-
-	/* Continue transfer */
-	/* return (1); */
-
-	/* No more transfer, let the irq schedule us again */
-	serial->bulk_in_inuse = 0;
-	return (0);
-}
-
-
-static int serial_write_irq (int state, void *buffer, int count, void *dev_id)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *) dev_id; 
-       	struct tty_struct *tty = serial->tty; 
-
-	debug_info("USB Serial: serial_write_irq\n");
-
-	if (!serial->bulk_out_inuse) {
-		debug_info("USB Serial: write irq for a finished pipe?\n");
-		return (0);
-		}
-
-	usb_terminate_bulk (serial->dev, serial->bulk_out_transfer);
-	serial->bulk_out_inuse = 0;
-
-	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
-		(tty->ldisc.write_wakeup)(tty);
-
-	wake_up_interruptible(&tty->write_wait);
-	
-	return 0;
-}
-
-
-static int usb_serial_irq (int state, void *buffer, int len, void *dev_id)
-{
-//	struct usb_serial_state *serial = (struct usb_serial_state *) dev_id;
-
-	debug_info("USB Serial: usb_serial_irq\n");
-
-	/* ask for a bulk read */
-//	serial->bulk_in_inuse = 1;
-//	serial->bulk_in_transfer = usb_request_bulk (serial->dev, serial->bulk_in_pipe, serial_read_irq, serial->bulk_in_buffer, serial->bulk_in_size, serial);
-
-	return (1);
-}
-
-
-
-
-
-/* tty interface functions */
-static int serial_open (struct tty_struct *tty, struct file * filp)
-{
-	struct usb_serial_state *serial;
-	
-	debug_info("USB: serial_open\n");
-
-	serial = &serial_state_table [MINOR(tty->device)-tty->driver.minor_start];
-	tty->driver_data = serial;
-	serial->tty = tty;
-	 
-	if (!serial->present) {
-		debug_info("USB Serial: no device registered\n");
-		return -EINVAL;
-	}
-
-	if (serial->active) {
-		debug_info ("USB Serial: device already open\n");
-		return -EINVAL;
-	}
-	serial->active = 1;
- 
-	/*Start reading from the device*/
-	serial->bulk_in_inuse = 1;
-	serial->bulk_in_transfer = usb_request_bulk (serial->dev, serial->bulk_in_pipe, serial_read_irq, serial->bulk_in_buffer, serial->bulk_in_size, serial);
-
-	/* Need to do device specific setup here (control lines, baud rate, etc.) */
-	/* FIXME!!! */
-				                  
-	return (0);
-}
-
-
-static void serial_close(struct tty_struct *tty, struct file * filp)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *) tty->driver_data; 
-	debug_info("USB: serial_close\n");
-	
-	if (!serial->present) {
-		debug_info("USB Serial: no device registered\n");
-		return;
-	}
-
-	if (!serial->active) {
-		debug_info ("USB Serial: device already open\n");
-		return;
-	}
-
-	/* Need to change the control lines here */
-	/* FIXME */
-	
-	if (serial->bulk_out_inuse){
-		usb_terminate_bulk (serial->dev, serial->bulk_out_transfer);
-		serial->bulk_out_inuse = 0;
-	}
-	if (serial->bulk_in_inuse){
-		usb_terminate_bulk (serial->dev, serial->bulk_in_transfer);
-		serial->bulk_in_inuse = 0;
-	}
-
-	/* release the irq? */
-	
-	serial->active = 0;
-}
-
-
-static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *) tty->driver_data; 
-	int written;
-	
-	debug_info("USB Serial: serial_write\n");
-
-	if (!serial->present) {
-		debug_info("USB Serial: device not registered\n");
-		return (-EINVAL);
-	}
-
-	if (!serial->active) {
-		debug_info ("USB Serial: device not opened\n");
-		return (-EINVAL);
-	}
-	
-	if (serial->bulk_out_inuse) {
-		debug_info ("USB Serial: already writing\n");
-		return (0);
-	}
-
-	written = (count > serial->bulk_out_size) ? serial->bulk_out_size : count;
-	  
-	if (from_user) {
-		copy_from_user(serial->bulk_out_buffer, buf, written);
-	}
-	else {
-		memcpy (serial->bulk_out_buffer, buf, written);
-	}  
-
-	/* send the data out the bulk port */
-	serial->bulk_out_inuse = 1;
-	serial->bulk_out_transfer = usb_request_bulk (serial->dev, serial->bulk_out_pipe, serial_write_irq, serial->bulk_out_buffer, written, serial);
-
-	return (written);
-} 
-
-
-static void serial_put_char (struct tty_struct *tty, unsigned char ch)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *)tty->driver_data; 
-	
-	debug_info("USB Serial: serial_put_char\n");
-	
-	if (!serial->present) {
-		debug_info("USB Serial: no device registered\n");
-		return;
-	}
-
-	if (!serial->active) {
-		debug_info ("USB Serial: device not open\n");
-		return;
-	}
-
-	if (serial->bulk_out_inuse) {
-		debug_info ("USB Serial: already writing\n");
-		return;
-	}
-
-	/* send the single character out the bulk port */
-	serial->bulk_out_buffer[0] = ch;
-	serial->bulk_out_inuse = 1;
-	serial->bulk_out_transfer = usb_request_bulk (serial->dev, serial->bulk_out_pipe, serial_write_irq, serial->bulk_out_buffer, 1, serial);
-
-	return;
-}                   
-
-
-static int serial_write_room (struct tty_struct *tty) 
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *)tty->driver_data; 
-
-	debug_info("USB Serial: serial_write_room\n");
-	
-	if (!serial->present) {
-		debug_info("USB Serial: no device registered\n");
-		return (-EINVAL);
-	}
-
-	if (!serial->active) {
-		debug_info ("USB Serial: device not open\n");
-		return (-EINVAL);
-	}
-	
-	if (serial->bulk_out_inuse) {
-		return (0);
-	}
-
-	return serial->bulk_out_size;
-}
-
-
-static int serial_chars_in_buffer (struct tty_struct *tty) 
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *)tty->driver_data; 
-
-	debug_info("USB Serial: serial_chars_in_buffer\n");
-	
-	if (!serial->present) {
-		debug_info("USB Serial: no device registered\n");
-		return (-EINVAL);
-	}
-
-	if (!serial->active) {
-		debug_info ("USB Serial: device not open\n");
-		return (-EINVAL);
-	}
-	
-	if (serial->bulk_out_inuse) {
-		return (serial->bulk_out_size);
-	}
-
-	return (0);
-}
-
-
-static void serial_throttle (struct tty_struct * tty)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *) tty->driver_data; 
-
-	debug_info("USB Serial: serial_throttle\n");
-	
-	if (!serial->present) {
-		debug_info("USB Serial: no device registered\n");
-		return;
-	}
-
-	if (!serial->active) {
-		debug_info ("USB Serial: device not open\n");
-		return;
-	}
-
-
-	/* Change the control signals */
-	/* FIXME!!! */
-
-	return;
-}
-
-
-static void serial_unthrottle (struct tty_struct * tty)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *) tty->driver_data; 
-
-	debug_info("USB Serial: serial_unthrottle\n");
-	
-	if (!serial->present) {
-		debug_info("USB Serial: no device registered\n");
-		return;
-	}
-
-	if (!serial->active) {
-		debug_info ("USB Serial: device not open\n");
-		return;
-	}
-
-
-	/* Change the control signals */
-	/* FIXME!!! */
-
-	return;
-}
-
-
-static int Get_Free_Serial (void)
-{
-	int i;
- 
-	for (i=0; i < NUM_PORTS; ++i) {
-		if (!serial_state_table[i].present)
-			return (i);
-	}
-	return (-1);
-}
-
-
-static int usb_serial_probe(struct usb_device *dev)
-{
-	struct usb_serial_state *serial;
-	struct usb_interface_descriptor *interface;
-	struct usb_endpoint_descriptor *endpoint;
-	SERIAL_TYPE type;
-	int serial_num;
-//	int ret;
-	int i;
-	
-	/* look at the device descriptor to see if it is a type that we	recognize */
-	type = unknown;
-	if ((dev->descriptor.idVendor == BELKIN_VENDOR_ID) &&
-	    (dev->descriptor.idProduct == BELKIN_SERIAL_CONVERTER)) {
-		/* This is the Belkin serial convertor */
-		type = Belkin;
-		}
-	
-	if ((dev->descriptor.idVendor == PERACOM_VENDOR_ID) &&
-	    (dev->descriptor.idProduct == PERACOM_SERIAL_CONVERTER)) {
-		/* This is the Peracom serial convertor */
-		type = Peracom;
-		}
-
-	if (type == unknown)
-		return (-1);	
-
-	printk (KERN_INFO "USB serial converter detected.\n");
-
-	if (usb_set_configuration(dev, dev->config[0].bConfigurationValue)) {
-		printk (KERN_INFO " Failed usb_set_configuration: serial\n");
-		return (-1);
-	}
-
-	if (0>(serial_num = Get_Free_Serial())) {
-		debug_info("USB Serial: Too many devices connected\n");
-		return (-1);
-	}
-	
-	serial = &serial_state_table[serial_num];
-
-       	memset(serial, 0, sizeof(serial));
-       	serial->dev = dev;
-	serial->type = type;
-       	dev->private = serial;
-
-	/* we should have 1 bulk in, 1 bulk out, and 1 interrupt in endpoints */
-	interface = &dev->config[0].interface[0].altsetting[0];
-	for (i = 0; i < interface->bNumEndpoints; ++i) {
-		endpoint = &interface->endpoint[i];
-		
-		if ((endpoint->bEndpointAddress & 0x80) &&
-		    ((endpoint->bmAttributes & 3) == 0x02)) {
-			/* we found the bulk in endpoint */
-			serial->bulk_in_inuse = 0;
-			serial->bulk_in_endpoint = endpoint->bEndpointAddress;
-			serial->bulk_in_size = endpoint->wMaxPacketSize;
-			serial->bulk_in_interval = endpoint->bInterval;
-			serial->bulk_in_pipe = usb_rcvbulkpipe (dev, serial->bulk_in_endpoint);
-			serial->bulk_in_buffer = kmalloc (serial->bulk_in_size, GFP_KERNEL);
-			if (!serial->bulk_in_buffer) {
-				printk("USB Serial: Couldn't allocate bulk_in_buffer\n");
-				goto probe_error;
-			}
-		}
-
-		if (((endpoint->bEndpointAddress & 0x80) == 0x00) &&
-		    ((endpoint->bmAttributes & 3) == 0x02)) {
-			/* we found the bulk out endpoint */
-			serial->bulk_out_inuse = 0;
-			serial->bulk_out_endpoint = endpoint->bEndpointAddress;
-			serial->bulk_out_size = endpoint->wMaxPacketSize;
-			serial->bulk_out_interval = endpoint->bInterval;
-			serial->bulk_out_pipe = usb_rcvbulkpipe (dev, serial->bulk_out_endpoint);
-			serial->bulk_out_buffer = kmalloc (serial->bulk_out_size, GFP_KERNEL);
-			if (!serial->bulk_out_buffer) {
-				printk("USB Serial: Couldn't allocate bulk_out_buffer\n");
-				goto probe_error;
-			}
-		}
-		
-		if ((endpoint->bEndpointAddress & 0x80) &&
-		    ((endpoint->bmAttributes & 3) == 0x03)) {
-			/* we found the interrupt in endpoint */
-			serial->interrupt_in_inuse = 0;
-			serial->interrupt_in_endpoint = endpoint->bEndpointAddress;
-			serial->interrupt_in_size = endpoint->wMaxPacketSize;
-			serial->interrupt_in_interval = endpoint->bInterval;
-			/* serial->interrupt_in_pipe = usb_rcvbulkpipe (dev, serial->bulk_in_endpoint); */
-			serial->interrupt_in_buffer = kmalloc (serial->bulk_in_size, GFP_KERNEL);
-			if (!serial->bulk_in_buffer) {
-				printk("USB Serial: Couldn't allocate interrupt_in_buffer\n");
-				goto probe_error;
-			}
-		}
-
-	}
-	
-
-	/* verify that we found all of the endpoints that we need */
-	if ((!serial->bulk_in_buffer) || 
-	    (!serial->bulk_out_buffer) ||
-	    (!serial->interrupt_in_buffer)) {
-		printk("USB Serial: did not find all of the required endpoints\n");
-		goto probe_error;
-	}
-		
-
-	/* set up an interrupt for out bulk in pipe */
-	/* ask for a bulk read */
-//	serial->bulk_in_inuse = 1;
-//	serial->bulk_in_transfer = usb_request_bulk (serial->dev, serial->bulk_in_pipe, serial_read_irq, serial->bulk_in_buffer, serial->bulk_in_size, serial);
-
-	/* set up our interrupt to be the time for the bulk in read */
-//	ret = usb_request_irq (dev, serial->bulk_in_pipe, usb_serial_irq, serial->bulk_in_interval, serial, &serial->irq_handle);
-//	if (ret) {
-//		printk(KERN_INFO "USB Serial failed usb_request_irq (0x%x)\n", ret);
-//		goto probe_error;
-//	}
-	
-	serial->present = 1;
-	MOD_INC_USE_COUNT;
-
-	return (0);
-
-probe_error:
-	if (serial) {
-		if (serial->bulk_in_buffer)
-			kfree (serial->bulk_in_buffer);
-		if (serial->bulk_out_buffer)
-			kfree (serial->bulk_out_buffer);
-		if (serial->interrupt_in_buffer)
-			kfree (serial->interrupt_in_buffer);
-	}
-	return (-1);
-}
-
-
-static void usb_serial_disconnect(struct usb_device *dev)
-{
-	struct usb_serial_state *serial = (struct usb_serial_state *)dev->private;
-
-	if (serial) {
-		if (!serial->present) {
-			/* something strange is going on */
-			debug_info("USB Serial: disconnect but not present?\n")
-			return;
-			}
-
-		/* need to stop any transfers...*/
-		if (serial->bulk_in_inuse) {
-			usb_terminate_bulk (serial->dev, serial->bulk_in_transfer);
-			serial->bulk_in_inuse = 0;
-		}
-		if (serial->bulk_out_inuse) {
-			usb_terminate_bulk (serial->dev, serial->bulk_out_transfer);
-			serial->bulk_out_inuse = 0;
-		}
-		// usb_release_irq (serial->dev, serial->irq_handle, serial->bulk_in_pipe);
-		if (serial->bulk_in_buffer)
-			kfree (serial->bulk_in_buffer);
-		if (serial->bulk_out_buffer)
-			kfree (serial->bulk_out_buffer);
-		if (serial->interrupt_in_buffer)
-			kfree (serial->interrupt_in_buffer);
-
-		serial->present = 0;
-		serial->active = 0;
-	}
-       	dev->private = NULL;
-	
-	MOD_DEC_USE_COUNT;
-
-	printk (KERN_INFO "USB Serial device disconnected.\n");
-}
-
-
-
-int usb_serial_init(void)
-{
-	int i;
-
-	/* Initalize our global data */
-	for (i = 0; i < NUM_PORTS; ++i) {
-		memset(&serial_state_table[i], 0x00, sizeof(struct usb_serial_state));
-	}
-
-	/* register the tty driver */
-	memset (&serial_tty_driver, 0, sizeof(struct tty_driver));
-	serial_tty_driver.magic			= TTY_DRIVER_MAGIC;
-	serial_tty_driver.driver_name		= "usb";
-	serial_tty_driver.name			= "ttyUSB";
-	serial_tty_driver.major			= SERIAL_MAJOR;
-	serial_tty_driver.minor_start		= 0;
-	serial_tty_driver.num			= NUM_PORTS;
-	serial_tty_driver.type			= TTY_DRIVER_TYPE_SERIAL;
-	serial_tty_driver.subtype		= SERIAL_TYPE_NORMAL;
-	serial_tty_driver.init_termios		= tty_std_termios;
-	serial_tty_driver.init_termios.c_cflag	= B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-	serial_tty_driver.flags			= TTY_DRIVER_REAL_RAW;
-	serial_tty_driver.refcount		= &serial_refcount;
-	serial_tty_driver.table			= serial_tty;
-	serial_tty_driver.termios		= serial_termios;
-	serial_tty_driver.termios_locked	= serial_termios_locked;
-	
-	serial_tty_driver.open			= serial_open;
-	serial_tty_driver.close			= serial_close;
-	serial_tty_driver.write			= serial_write;
-	serial_tty_driver.put_char		= serial_put_char;
-	serial_tty_driver.flush_chars		= NULL; //serial_flush_chars;
-	serial_tty_driver.write_room		= serial_write_room;
-	serial_tty_driver.ioctl			= NULL; //serial_ioctl;
-	serial_tty_driver.set_termios		= NULL; //serial_set_termios;
-	serial_tty_driver.set_ldisc		= NULL; 
-	serial_tty_driver.throttle		= serial_throttle;
-	serial_tty_driver.unthrottle		= serial_unthrottle;
-	serial_tty_driver.stop			= NULL; //serial_stop;
-	serial_tty_driver.start			= NULL; //serial_start;
-	serial_tty_driver.hangup		= NULL; //serial_hangup;
-	serial_tty_driver.break_ctl		= NULL; //serial_break;
-	serial_tty_driver.wait_until_sent	= NULL; //serial_wait_until_sent;
-	serial_tty_driver.send_xchar		= NULL; //serial_send_xchar;
-	serial_tty_driver.read_proc		= NULL; //serial_read_proc;
-	serial_tty_driver.chars_in_buffer	= serial_chars_in_buffer;
-	serial_tty_driver.flush_buffer		= NULL; //serial_flush_buffer;
-	if (tty_register_driver (&serial_tty_driver)) {
-		printk( "USB Serial: failed to register tty driver\n" );
-		return -EPERM;
-	}
-	
-	/* register the USB driver */
-	usb_register(&usb_serial_driver);
-	printk(KERN_INFO "USB Serial support registered.\n");
-	return 0;
-}
-
-
-#ifdef MODULE
-int init_module(void)
-{
-	return usb_serial_init();
-}
-
-void cleanup_module(void)
-{
-	tty_unregister_driver(&serial_tty_driver);
-	usb_deregister(&usb_serial_driver);
-}
-
-#endif
-