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 000000000000..4d46394f351b
--- /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");