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, 315 insertions, 0 deletions

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
new file mode 100644
index 000000000000..99214aa3cd19
--- /dev/null
+++ b/drivers/usb/serial/generic.c
@@ -0,0 +1,315 @@
+/*
+ * USB Serial Converter Generic functions
+ *
+ * Copyright (C) 1999 - 2002 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 version
+ *      2 as published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/usb.h>
+#include <asm/uaccess.h>
+#include "usb-serial.h"
+
+static int debug;
+
+#ifdef CONFIG_USB_SERIAL_GENERIC
+static __u16 vendor  = 0x05f9;
+static __u16 product = 0xffff;
+
+module_param(vendor, ushort, 0);
+MODULE_PARM_DESC(vendor, "User specified USB idVendor");
+
+module_param(product, ushort, 0);
+MODULE_PARM_DESC(product, "User specified USB idProduct");
+
+static struct usb_device_id generic_device_ids[2]; /* Initially all zeroes. */
+
+/* All of the device info needed for the Generic Serial Converter */
+struct usb_serial_device_type usb_serial_generic_device = {
+        .owner =                THIS_MODULE,
+        .name =                 "Generic",
+        .short_name =           "generic",
+        .id_table =             generic_device_ids,
+        .num_interrupt_in =     NUM_DONT_CARE,
+        .num_bulk_in =          NUM_DONT_CARE,
+        .num_bulk_out =         NUM_DONT_CARE,
+        .num_ports =            1,
+        .shutdown =             usb_serial_generic_shutdown,
+};
+
+/* we want to look at all devices, as the vendor/product id can change
+ * depending on the command line argument */
+static struct usb_device_id generic_serial_ids[] = {
+        {.driver_info = 42},
+        {}
+};
+
+static int generic_probe(struct usb_interface *interface,
+                               const struct usb_device_id *id)
+{
+        const struct usb_device_id *id_pattern;
+
+        id_pattern = usb_match_id(interface, generic_device_ids);
+        if (id_pattern != NULL)
+                return usb_serial_probe(interface, id);
+        return -ENODEV;
+}
+
+static struct usb_driver generic_driver = {
+        .owner =        THIS_MODULE,
+        .name =         "usbserial_generic",
+        .probe =        generic_probe,
+        .disconnect =   usb_serial_disconnect,
+        .id_table =     generic_serial_ids,
+};
+#endif
+
+int usb_serial_generic_register (int _debug)
+{
+        int retval = 0;
+
+        debug = _debug;
+#ifdef CONFIG_USB_SERIAL_GENERIC
+        generic_device_ids[0].idVendor = vendor;
+        generic_device_ids[0].idProduct = product;
+        generic_device_ids[0].match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT;
+
+        /* register our generic driver with ourselves */
+        retval = usb_serial_register (&usb_serial_generic_device);
+        if (retval)
+                goto exit;
+        retval = usb_register(&generic_driver);
+        if (retval)
+                usb_serial_deregister(&usb_serial_generic_device);
+exit:
+#endif
+        return retval;
+}
+
+void usb_serial_generic_deregister (void)
+{
+#ifdef CONFIG_USB_SERIAL_GENERIC
+        /* remove our generic driver */
+        usb_deregister(&generic_driver);
+        usb_serial_deregister (&usb_serial_generic_device);
+#endif
+}
+
+int usb_serial_generic_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 low_latency on so that our tty_push actually forces the data through, 
+           otherwise it is scheduled, and with high data rates (like with OHCI) data
+           can get lost. */
+        if (port->tty)
+                port->tty->low_latency = 1;
+
+        /* if we have a bulk interrupt, start reading from it */
+        if (serial->num_bulk_in) {
+                /* 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,
+                                   ((serial->type->read_bulk_callback) ?
+                                     serial->type->read_bulk_callback :
+                                     usb_serial_generic_read_bulk_callback),
+                                   port);
+                result = usb_submit_urb(port->read_urb, GFP_KERNEL);
+                if (result)
+                        dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+        }
+
+        return result;
+}
+
+static void generic_cleanup (struct usb_serial_port *port)
+{
+        struct usb_serial *serial = port->serial;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (serial->dev) {
+                /* shutdown any bulk reads that might be going on */
+                if (serial->num_bulk_out)
+                        usb_kill_urb(port->write_urb);
+                if (serial->num_bulk_in)
+                        usb_kill_urb(port->read_urb);
+        }
+}
+
+void usb_serial_generic_close (struct usb_serial_port *port, struct file * filp)
+{
+        dbg("%s - port %d", __FUNCTION__, port->number);
+        generic_cleanup (port);
+}
+
+int usb_serial_generic_write(struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+        struct usb_serial *serial = port->serial;
+        int result;
+        unsigned char *data;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (count == 0) {
+                dbg("%s - write request of 0 bytes", __FUNCTION__);
+                return (0);
+        }
+
+        /* only do something if we have a bulk out endpoint */
+        if (serial->num_bulk_out) {
+                if (port->write_urb->status == -EINPROGRESS) {
+                        dbg("%s - already writing", __FUNCTION__);
+                        return (0);
+                }
+
+                count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
+
+                memcpy (port->write_urb->transfer_buffer, buf, count);
+                data = port->write_urb->transfer_buffer;
+                usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, data);
+
+                /* set up our urb */
+                usb_fill_bulk_urb (port->write_urb, serial->dev,
+                                   usb_sndbulkpipe (serial->dev,
+                                                    port->bulk_out_endpointAddress),
+                                   port->write_urb->transfer_buffer, count,
+                                   ((serial->type->write_bulk_callback) ? 
+                                     serial->type->write_bulk_callback :
+                                     usb_serial_generic_write_bulk_callback), port);
+
+                /* send the data out the bulk port */
+                result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+                if (result)
+                        dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
+                else
+                        result = count;
+
+                return result;
+        }
+
+        /* no bulk out, so return 0 bytes written */
+        return (0);
+}
+
+int usb_serial_generic_write_room (struct usb_serial_port *port)
+{
+        struct usb_serial *serial = port->serial;
+        int room = 0;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+        
+        if (serial->num_bulk_out) {
+                if (port->write_urb->status != -EINPROGRESS)
+                        room = port->bulk_out_size;
+        }
+
+        dbg("%s - returns %d", __FUNCTION__, room);
+        return (room);
+}
+
+int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port)
+{
+        struct usb_serial *serial = port->serial;
+        int chars = 0;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (serial->num_bulk_out) {
+                if (port->write_urb->status == -EINPROGRESS)
+                        chars = port->write_urb->transfer_buffer_length;
+        }
+
+        dbg("%s - returns %d", __FUNCTION__, chars);
+        return (chars);
+}
+
+void usb_serial_generic_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
+{
+        struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
+        struct usb_serial *serial = port->serial;
+        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 (tty && urb->actual_length) {
+                for (i = 0; i < urb->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);
+        }
+
+        /* Continue trying to always read  */
+        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,
+                           ((serial->type->read_bulk_callback) ? 
+                             serial->type->read_bulk_callback : 
+                             usb_serial_generic_read_bulk_callback), port);
+        result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+        if (result)
+                dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+}
+
+void usb_serial_generic_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;
+        }
+
+        usb_serial_port_softint((void *)port);
+
+        schedule_work(&port->work);
+}
+
+void usb_serial_generic_shutdown (struct usb_serial *serial)
+{
+        int i;
+
+        dbg("%s", __FUNCTION__);
+
+        /* stop reads and writes on all ports */
+        for (i=0; i < serial->num_ports; ++i) {
+                generic_cleanup(serial->port[i]);
+        }
+}
+