[PATCH] USB serial: add navman driver

Thanks to Warren Lewis <wlewis@scn.org> for the information needed to
write the driver and for testing it out.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 165 insertions, 0 deletions

diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig
index be5dc80836c3..5a8a2c91c2b2 100644
--- a/drivers/usb/serial/Kconfig
+++ b/drivers/usb/serial/Kconfig
@@ -403,6 +403,13 @@ config USB_SERIAL_MCT_U232
           To compile this driver as a module, choose M here: the
           module will be called mct_u232.
 
+config USB_SERIAL_NAVMAN
+        tristate "USB Navman GPS device"
+        depends on USB_SERIAL
+        help
+          To compile this driver as a module, choose M here: the
+          module will be called navman.
+
 config USB_SERIAL_PL2303
         tristate "USB Prolific 2303 Single Port Serial Driver"
         depends on USB_SERIAL
diff --git a/drivers/usb/serial/Makefile b/drivers/usb/serial/Makefile
index f0b04420cea1..f7fe4172efed 100644
--- a/drivers/usb/serial/Makefile
+++ b/drivers/usb/serial/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_USB_SERIAL_KEYSPAN_PDA)		+= keyspan_pda.o
 obj-$(CONFIG_USB_SERIAL_KLSI)                   += kl5kusb105.o
 obj-$(CONFIG_USB_SERIAL_KOBIL_SCT)              += kobil_sct.o
 obj-$(CONFIG_USB_SERIAL_MCT_U232)               += mct_u232.o
+obj-$(CONFIG_USB_SERIAL_NAVMAN)                 += navman.o
 obj-$(CONFIG_USB_SERIAL_OMNINET)                += omninet.o
 obj-$(CONFIG_USB_SERIAL_OPTION)                 += option.o
 obj-$(CONFIG_USB_SERIAL_PL2303)                 += pl2303.o
diff --git a/drivers/usb/serial/navman.c b/drivers/usb/serial/navman.c
new file mode 100644
index 000000000000..7f544081032e
--- /dev/null
+++ b/drivers/usb/serial/navman.c
@@ -0,0 +1,157 @@
+/*
+ * Navman Serial USB driver
+ *
+ * Copyright (C) 2006 Greg Kroah-Hartman <gregkh@suse.de>
+ *
+ *      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/kernel.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include "usb-serial.h"
+
+static int debug;
+
+static struct usb_device_id id_table [] = {
+        { USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
+        { },
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static struct usb_driver navman_driver = {
+        .name =         "navman",
+        .probe =        usb_serial_probe,
+        .disconnect =   usb_serial_disconnect,
+        .id_table =     id_table,
+        .no_dynamic_id =        1,
+};
+
+static void navman_read_int_callback(struct urb *urb, struct pt_regs *regs)
+{
+        struct usb_serial_port *port = urb->context;
+        unsigned char *data = urb->transfer_buffer;
+        struct tty_struct *tty;
+        int result;
+
+        switch (urb->status) {
+        case 0:
+                /* success */
+                break;
+        case -ECONNRESET:
+        case -ENOENT:
+        case -ESHUTDOWN:
+                /* this urb is terminated, clean up */
+                dbg("%s - urb shutting down with status: %d",
+                    __FUNCTION__, urb->status);
+                return;
+        default:
+                dbg("%s - nonzero urb status received: %d",
+                    __FUNCTION__, urb->status);
+                goto exit;
+        }
+
+        usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
+                              urb->actual_length, data);
+
+        tty = port->tty;
+        if (tty && urb->actual_length) {
+                tty_buffer_request_room(tty, urb->actual_length);
+                tty_insert_flip_string(tty, data, urb->actual_length);
+                tty_flip_buffer_push(tty);
+        }
+
+exit:
+        result = usb_submit_urb(urb, GFP_ATOMIC);
+        if (result)
+                dev_err(&urb->dev->dev,
+                        "%s - Error %d submitting interrupt urb\n",
+                        __FUNCTION__, result);
+}
+
+static int navman_open(struct usb_serial_port *port, struct file *filp)
+{
+        int result = 0;
+
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (port->interrupt_in_urb) {
+                dbg("%s - adding interrupt input for treo", __FUNCTION__);
+                result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
+                if (result)
+                        dev_err(&port->dev,
+                                "%s - failed submitting interrupt urb, error %d\n",
+                                __FUNCTION__, result);
+        }
+        return result;
+}
+
+static void navman_close(struct usb_serial_port *port, struct file *filp)
+{
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        if (port->interrupt_in_urb)
+                usb_kill_urb(port->interrupt_in_urb);
+}
+
+static int navman_write(struct usb_serial_port *port,
+                        const unsigned char *buf, int count)
+{
+        dbg("%s - port %d", __FUNCTION__, port->number);
+
+        /*
+         * This device can't write any data, only read from the device
+         * so we just silently eat all data sent to us and say it was
+         * successfully sent.
+         * Evil, I know, but do you have a better idea?
+         */
+
+        return count;
+}
+
+static struct usb_serial_driver navman_device = {
+        .driver = {
+                .owner =        THIS_MODULE,
+                .name =         "navman",
+        },
+        .id_table =             id_table,
+        .num_interrupt_in =     NUM_DONT_CARE,
+        .num_bulk_in =          NUM_DONT_CARE,
+        .num_bulk_out =         NUM_DONT_CARE,
+        .num_ports =            1,
+        .open =                 navman_open,
+        .close =                navman_close,
+        .write =                navman_write,
+        .read_int_callback =    navman_read_int_callback,
+};
+
+static int __init navman_init(void)
+{
+        int retval;
+
+        retval = usb_serial_register(&navman_device);
+        if (retval)
+                return retval;
+        retval = usb_register(&navman_driver);
+        if (retval)
+                usb_serial_deregister(&navman_device);
+        return retval;
+}
+
+static void __exit navman_exit(void)
+{
+        usb_deregister(&navman_driver);
+        usb_serial_deregister(&navman_device);
+}
+
+module_init(navman_init);
+module_exit(navman_exit);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");