Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 596 insertions, 0 deletions

diff --git a/drivers/usb/serial/empeg.c b/drivers/usb/serial/empeg.c
new file mode 100644
index 00000000000..4d46394f351
--- /dev/null
+++ b/drivers/usb/serial/empeg.c
@@ -0,0 +1,596 @@
+/*
+ * USB Empeg empeg-car player driver
+ *
+ *	Copyright (C) 2000, 2001
+ *	    Gary Brubaker (xavyer@ix.netcom.com)
+ *
+ *	Copyright (C) 1999 - 2001
+ *	    Greg Kroah-Hartman (greg@kroah.com)
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License, as published by
+ *	the Free Software Foundation, version 2.
+ *
+ * See Documentation/usb/usb-serial.txt for more information on using this driver
+ * 
+ * (07/16/2001) gb
+ *	remove unused code in empeg_close() (thanks to Oliver Neukum for pointing this
+ *	out) and rewrote empeg_set_termios().
+ * 
+ * (05/30/2001) gkh
+ *	switched from using spinlock to a semaphore, which fixes lots of problems.
+ *
+ * (04/08/2001) gb
+ *      Identify version on module load.
+ * 
+ * (01/22/2001) gb
+ *	Added write_room() and chars_in_buffer() support. 
+ * 
+ * (12/21/2000) gb
+ *	Moved termio stuff inside the port->active check.
+ *	Moved MOD_DEC_USE_COUNT to end of empeg_close().
+ * 
+ * (12/03/2000) gb
+ *	Added port->tty->ldisc.set_termios(port->tty, NULL) to empeg_open()
+ *	This notifies the tty driver that the termios have changed.
+ * 
+ * (11/13/2000) gb
+ *	Moved tty->low_latency = 1 from empeg_read_bulk_callback() to empeg_open()
+ *	(It only needs to be set once - Doh!)
+ * 
+ * (11/11/2000) gb
+ *	Updated to work with id_table structure.
+ * 
+ * (11/04/2000) gb
+ *	Forked this from visor.c, and hacked it up to work with an
+ *	Empeg ltd. empeg-car player.  Constructive criticism welcomed.
+ *	I would like to say, 'Thank You' to Greg Kroah-Hartman for the
+ *	use of his code, and for his guidance, advice and patience. :)
+ *	A 'Thank You' is in order for John Ripley of Empeg ltd for his
+ *	advice, and patience too.
+ * 
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <asm/uaccess.h>
+#include <linux/usb.h>
+#include "usb-serial.h"
+
+static int debug;
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v1.2"
+#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>"
+#define DRIVER_DESC "USB Empeg Mark I/II Driver"
+
+#define EMPEG_VENDOR_ID			0x084f
+#define EMPEG_PRODUCT_ID		0x0001
+
+/* function prototypes for an empeg-car player */
+static int  empeg_open			(struct usb_serial_port *port, struct file *filp);
+static void empeg_close			(struct usb_serial_port *port, struct file *filp);
+static int  empeg_write			(struct usb_serial_port *port,
+					const unsigned char *buf,
+					int count);
+static int  empeg_write_room		(struct usb_serial_port *port);
+static int  empeg_chars_in_buffer	(struct usb_serial_port *port);
+static void empeg_throttle		(struct usb_serial_port *port);
+static void empeg_unthrottle		(struct usb_serial_port *port);
+static int  empeg_startup		(struct usb_serial *serial);
+static void empeg_shutdown		(struct usb_serial *serial);
+static int  empeg_ioctl			(struct usb_serial_port *port,
+					struct file * file,
+					unsigned int cmd,
+					unsigned long arg);
+static void empeg_set_termios		(struct usb_serial_port *port, struct termios *old_termios);
+static void empeg_write_bulk_callback	(struct urb *urb, struct pt_regs *regs);
+static void empeg_read_bulk_callback	(struct urb *urb, struct pt_regs *regs);
+
+static struct usb_device_id id_table [] = {
+	{ USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) },
+	{ }					/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+static struct usb_driver empeg_driver = {
+	.owner =	THIS_MODULE,
+	.name =		"empeg",
+	.probe =	usb_serial_probe,
+	.disconnect =	usb_serial_disconnect,
+	.id_table =	id_table,
+};
+
+static struct usb_serial_device_type empeg_device = {
+	.owner =		THIS_MODULE,
+	.name =			"Empeg",
+	.id_table =		id_table,
+	.num_interrupt_in =	0,
+	.num_bulk_in =		1,
+	.num_bulk_out =		1,
+	.num_ports =		1,
+	.open =			empeg_open,
+	.close =		empeg_close,
+	.throttle =		empeg_throttle,
+	.unthrottle =		empeg_unthrottle,
+	.attach =		empeg_startup,
+	.shutdown =		empeg_shutdown,
+	.ioctl =		empeg_ioctl,
+	.set_termios =		empeg_set_termios,
+	.write =		empeg_write,
+	.write_room =		empeg_write_room,
+	.chars_in_buffer =	empeg_chars_in_buffer,
+	.write_bulk_callback =	empeg_write_bulk_callback,
+	.read_bulk_callback =	empeg_read_bulk_callback,
+};
+
+#define NUM_URBS			16
+#define URB_TRANSFER_BUFFER_SIZE	4096
+
+static struct urb	*write_urb_pool[NUM_URBS];
+static spinlock_t	write_urb_pool_lock;
+static int		bytes_in;
+static int		bytes_out;
+
+/******************************************************************************
+ * Empeg specific driver functions
+ ******************************************************************************/
+static int empeg_open (struct usb_serial_port *port, struct file *filp)
+{
+	struct usb_serial *serial = port->serial;
+	int result = 0;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	/* Force default termio settings */
+	empeg_set_termios (port, NULL) ;
+
+	bytes_in = 0;
+	bytes_out = 0;
+
+	/* Start reading from the device */
+	usb_fill_bulk_urb(
+		port->read_urb,
+		serial->dev, 
+		usb_rcvbulkpipe(serial->dev,
+			port->bulk_in_endpointAddress),
+		port->read_urb->transfer_buffer,
+		port->read_urb->transfer_buffer_length,
+		empeg_read_bulk_callback,
+		port);
+
+	result = usb_submit_urb(port->read_urb, GFP_KERNEL);
+
+	if (result)
+		dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
+
+	return result;
+}
+
+
+static void empeg_close (struct usb_serial_port *port, struct file * filp)
+{
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	/* shutdown our bulk read */
+	usb_kill_urb(port->read_urb);
+	/* Uncomment the following line if you want to see some statistics in your syslog */
+	/* dev_info (&port->dev, "Bytes In = %d  Bytes Out = %d\n", bytes_in, bytes_out); */
+}
+
+
+static int empeg_write (struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+	struct usb_serial *serial = port->serial;
+	struct urb *urb;
+	const unsigned char *current_position = buf;
+	unsigned long flags;
+	int status;
+	int i;
+	int bytes_sent = 0;
+	int transfer_size;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	while (count > 0) {
+
+		/* try to find a free urb in our list of them */
+		urb = NULL;
+
+		spin_lock_irqsave (&write_urb_pool_lock, flags);
+
+		for (i = 0; i < NUM_URBS; ++i) {
+			if (write_urb_pool[i]->status != -EINPROGRESS) {
+				urb = write_urb_pool[i];
+				break;
+			}
+		}
+
+		spin_unlock_irqrestore (&write_urb_pool_lock, flags);
+
+		if (urb == NULL) {
+			dbg("%s - no more free urbs", __FUNCTION__);
+			goto exit;
+		}
+
+		if (urb->transfer_buffer == NULL) {
+			urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
+			if (urb->transfer_buffer == NULL) {
+				dev_err(&port->dev, "%s no more kernel memory...\n", __FUNCTION__);
+				goto exit;
+			}
+		}
+
+		transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE);
+
+		memcpy (urb->transfer_buffer, current_position, transfer_size);
+
+		usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, urb->transfer_buffer);
+
+		/* build up our urb */
+		usb_fill_bulk_urb (
+			urb,
+			serial->dev,
+			usb_sndbulkpipe(serial->dev,
+				port->bulk_out_endpointAddress), 
+			urb->transfer_buffer,
+			transfer_size,
+			empeg_write_bulk_callback,
+			port);
+
+		/* send it down the pipe */
+		status = usb_submit_urb(urb, GFP_ATOMIC);
+		if (status) {
+			dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed with status = %d\n", __FUNCTION__, status);
+			bytes_sent = status;
+			break;
+		}
+
+		current_position += transfer_size;
+		bytes_sent += transfer_size;
+		count -= transfer_size;
+		bytes_out += transfer_size;
+
+	}
+
+exit:
+	return bytes_sent;
+
+} 
+
+
+static int empeg_write_room (struct usb_serial_port *port)
+{
+	unsigned long flags;
+	int i;
+	int room = 0;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	spin_lock_irqsave (&write_urb_pool_lock, flags);
+
+	/* tally up the number of bytes available */
+	for (i = 0; i < NUM_URBS; ++i) {
+		if (write_urb_pool[i]->status != -EINPROGRESS) {
+			room += URB_TRANSFER_BUFFER_SIZE;
+		}
+	} 
+
+	spin_unlock_irqrestore (&write_urb_pool_lock, flags);
+
+	dbg("%s - returns %d", __FUNCTION__, room);
+
+	return (room);
+
+}
+
+
+static int empeg_chars_in_buffer (struct usb_serial_port *port)
+{
+	unsigned long flags;
+	int i;
+	int chars = 0;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	spin_lock_irqsave (&write_urb_pool_lock, flags);
+
+	/* tally up the number of bytes waiting */
+	for (i = 0; i < NUM_URBS; ++i) {
+		if (write_urb_pool[i]->status == -EINPROGRESS) {
+			chars += URB_TRANSFER_BUFFER_SIZE;
+		}
+	}
+
+	spin_unlock_irqrestore (&write_urb_pool_lock, flags);
+
+	dbg("%s - returns %d", __FUNCTION__, chars);
+
+	return (chars);
+
+}
+
+
+static void empeg_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (urb->status) {
+		dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
+		return;
+	}
+
+	schedule_work(&port->work);
+}
+
+
+static void empeg_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
+{
+	struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+	struct tty_struct *tty;
+	unsigned char *data = urb->transfer_buffer;
+	int i;
+	int result;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if (urb->status) {
+		dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
+		return;
+	}
+
+	usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
+
+	tty = port->tty;
+
+	if (urb->actual_length) {
+		for (i = 0; i < urb->actual_length ; ++i) {
+			/* gb - 2000/11/13
+			 * If we insert too many characters we'll overflow the buffer.
+			 * This means we'll lose bytes - Decidedly bad.
+			 */
+			if(tty->flip.count >= TTY_FLIPBUF_SIZE) {
+				tty_flip_buffer_push(tty);
+				}
+			tty_insert_flip_char(tty, data[i], 0);
+		}
+		/* gb - 2000/11/13
+		 * Goes straight through instead of scheduling - if tty->low_latency is set.
+		 */
+		tty_flip_buffer_push(tty);
+		bytes_in += urb->actual_length;
+	}
+
+	/* Continue trying to always read  */
+	usb_fill_bulk_urb(
+		port->read_urb,
+		port->serial->dev, 
+		usb_rcvbulkpipe(port->serial->dev,
+			port->bulk_in_endpointAddress),
+		port->read_urb->transfer_buffer,
+		port->read_urb->transfer_buffer_length,
+		empeg_read_bulk_callback,
+		port);
+
+	result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+
+	if (result)
+		dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+
+	return;
+
+}
+
+
+static void empeg_throttle (struct usb_serial_port *port)
+{
+	dbg("%s - port %d", __FUNCTION__, port->number);
+	usb_kill_urb(port->read_urb);
+}
+
+
+static void empeg_unthrottle (struct usb_serial_port *port)
+{
+	int result;
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	port->read_urb->dev = port->serial->dev;
+
+	result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+
+	if (result)
+		dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
+
+	return;
+}
+
+
+static int  empeg_startup (struct usb_serial *serial)
+{
+	int r;
+
+	dbg("%s", __FUNCTION__);
+
+	if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
+		err("active config #%d != 1 ??",
+			serial->dev->actconfig->desc.bConfigurationValue);
+		return -ENODEV;
+	}
+	dbg("%s - reset config", __FUNCTION__);
+	r = usb_reset_configuration (serial->dev);
+
+	/* continue on with initialization */
+	return r;
+
+}
+
+
+static void empeg_shutdown (struct usb_serial *serial)
+{
+	dbg ("%s", __FUNCTION__);
+}
+
+
+static int empeg_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
+{
+	dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
+
+	return -ENOIOCTLCMD;
+}
+
+
+static void empeg_set_termios (struct usb_serial_port *port, struct termios *old_termios)
+{
+
+	dbg("%s - port %d", __FUNCTION__, port->number);
+
+	if ((!port->tty) || (!port->tty->termios)) {
+		dbg("%s - no tty structures", __FUNCTION__);
+		return;
+	}
+
+	/*
+         * The empeg-car player wants these particular tty settings.
+         * You could, for example, change the baud rate, however the
+         * player only supports 115200 (currently), so there is really
+         * no point in support for changes to the tty settings.
+         * (at least for now)
+         *
+         * The default requirements for this device are:
+         */
+	port->tty->termios->c_iflag
+		&= ~(IGNBRK	/* disable ignore break */
+		| BRKINT	/* disable break causes interrupt */
+		| PARMRK	/* disable mark parity errors */
+		| ISTRIP	/* disable clear high bit of input characters */
+		| INLCR		/* disable translate NL to CR */
+		| IGNCR		/* disable ignore CR */
+		| ICRNL		/* disable translate CR to NL */
+		| IXON);	/* disable enable XON/XOFF flow control */
+
+	port->tty->termios->c_oflag
+		&= ~OPOST;	/* disable postprocess output characters */
+
+	port->tty->termios->c_lflag
+		&= ~(ECHO	/* disable echo input characters */
+		| ECHONL	/* disable echo new line */
+		| ICANON	/* disable erase, kill, werase, and rprnt special characters */
+		| ISIG		/* disable interrupt, quit, and suspend special characters */
+		| IEXTEN);	/* disable non-POSIX special characters */
+
+	port->tty->termios->c_cflag
+		&= ~(CSIZE	/* no size */
+		| PARENB	/* disable parity bit */
+		| CBAUD);	/* clear current baud rate */
+
+	port->tty->termios->c_cflag
+		|= (CS8		/* character size 8 bits */
+		| B115200);	/* baud rate 115200 */
+
+	/*
+	 * Force low_latency on; otherwise the pushes are scheduled;
+	 * this is bad as it opens up the possibility of dropping bytes
+	 * on the floor.  We don't want to drop bytes on the floor. :)
+	 */
+	port->tty->low_latency = 1;
+
+	return;
+}
+
+
+static int __init empeg_init (void)
+{
+	struct urb *urb;
+	int i, retval;
+
+	/* create our write urb pool and transfer buffers */ 
+	spin_lock_init (&write_urb_pool_lock);
+	for (i = 0; i < NUM_URBS; ++i) {
+		urb = usb_alloc_urb(0, GFP_KERNEL);
+		write_urb_pool[i] = urb;
+		if (urb == NULL) {
+			err("No more urbs???");
+			continue;
+		}
+
+		urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
+		if (!urb->transfer_buffer) {
+			err("%s - out of memory for urb buffers.", 
+			    __FUNCTION__);
+			continue;
+		}
+	}
+
+	retval = usb_serial_register(&empeg_device);
+	if (retval)
+		goto failed_usb_serial_register;
+	retval = usb_register(&empeg_driver);
+	if (retval)
+		goto failed_usb_register;
+
+	info(DRIVER_VERSION ":" DRIVER_DESC);
+
+	return 0;
+failed_usb_register:
+	usb_serial_deregister(&empeg_device);
+failed_usb_serial_register:
+	for (i = 0; i < NUM_URBS; ++i) {
+		if (write_urb_pool[i]) {
+			if (write_urb_pool[i]->transfer_buffer)
+				kfree(write_urb_pool[i]->transfer_buffer);
+			usb_free_urb(write_urb_pool[i]);
+		}
+	}
+	return retval;
+}
+
+
+static void __exit empeg_exit (void)
+{
+	int i;
+	unsigned long flags;
+
+	usb_deregister(&empeg_driver);
+	usb_serial_deregister (&empeg_device);
+
+	spin_lock_irqsave (&write_urb_pool_lock, flags);
+
+	for (i = 0; i < NUM_URBS; ++i) {
+		if (write_urb_pool[i]) {
+			/* FIXME - uncomment the following usb_kill_urb call when
+			 * the host controllers get fixed to set urb->dev = NULL after
+			 * the urb is finished.  Otherwise this call oopses. */
+			/* usb_kill_urb(write_urb_pool[i]); */
+			if (write_urb_pool[i]->transfer_buffer)
+				kfree(write_urb_pool[i]->transfer_buffer);
+			usb_free_urb (write_urb_pool[i]);
+		}
+	}
+
+	spin_unlock_irqrestore (&write_urb_pool_lock, flags);
+}
+
+
+module_init(empeg_init);
+module_exit(empeg_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");