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path: root/drivers/usb/serial/airprime.c
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Diffstat (limited to 'drivers/usb/serial/airprime.c')
-rw-r--r--drivers/usb/serial/airprime.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/drivers/usb/serial/airprime.c b/drivers/usb/serial/airprime.c
new file mode 100644
index 000000000000..b3f1d1e82468
--- /dev/null
+++ b/drivers/usb/serial/airprime.c
@@ -0,0 +1,355 @@
+/*
+ * AirPrime CDMA Wireless Serial USB driver
+ *
+ * Copyright (C) 2005-2006 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 <linux/usb/serial.h>
+
+static struct usb_device_id id_table [] = {
+ { USB_DEVICE(0x0c88, 0x17da) }, /* Kyocera Wireless KPC650/Passport */
+ { },
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+#define URB_TRANSFER_BUFFER_SIZE 4096
+#define NUM_READ_URBS 4
+#define NUM_WRITE_URBS 4
+#define NUM_BULK_EPS 3
+#define MAX_BULK_EPS 6
+
+/* if overridden by the user, then use their value for the size of the
+ * read and write urbs, and the number of endpoints */
+static int buffer_size = URB_TRANSFER_BUFFER_SIZE;
+static int endpoints = NUM_BULK_EPS;
+static int debug;
+struct airprime_private {
+ spinlock_t lock;
+ int outstanding_urbs;
+ int throttled;
+ struct urb *read_urbp[NUM_READ_URBS];
+
+ /* Settings for the port */
+ int rts_state; /* Handshaking pins (outputs) */
+ int dtr_state;
+ int cts_state; /* Handshaking pins (inputs) */
+ int dsr_state;
+ int dcd_state;
+ int ri_state;
+};
+
+static int airprime_send_setup(struct usb_serial_port *port)
+{
+ struct usb_serial *serial = port->serial;
+ struct airprime_private *priv;
+
+ dbg("%s", __func__);
+
+ if (port->number != 0)
+ return 0;
+
+ priv = usb_get_serial_port_data(port);
+
+ if (port->port.tty) {
+ int val = 0;
+ if (priv->dtr_state)
+ val |= 0x01;
+ if (priv->rts_state)
+ val |= 0x02;
+
+ return usb_control_msg(serial->dev,
+ usb_rcvctrlpipe(serial->dev, 0),
+ 0x22, 0x21, val, 0, NULL, 0,
+ USB_CTRL_SET_TIMEOUT);
+ }
+
+ return 0;
+}
+
+static void airprime_read_bulk_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ unsigned char *data = urb->transfer_buffer;
+ struct tty_struct *tty;
+ int result;
+ int status = urb->status;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (status) {
+ dbg("%s - nonzero read bulk status received: %d",
+ __func__, status);
+ return;
+ }
+ usb_serial_debug_data(debug, &port->dev, __func__,
+ urb->actual_length, data);
+
+ tty = port->port.tty;
+ if (tty && urb->actual_length) {
+ tty_insert_flip_string(tty, data, urb->actual_length);
+ tty_flip_buffer_push(tty);
+ }
+
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result)
+ dev_err(&port->dev,
+ "%s - failed resubmitting read urb, error %d\n",
+ __func__, result);
+ return;
+}
+
+static void airprime_write_bulk_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ struct airprime_private *priv = usb_get_serial_port_data(port);
+ int status = urb->status;
+ unsigned long flags;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ /* free up the transfer buffer, as usb_free_urb() does not do this */
+ kfree(urb->transfer_buffer);
+
+ if (status)
+ dbg("%s - nonzero write bulk status received: %d",
+ __func__, status);
+ spin_lock_irqsave(&priv->lock, flags);
+ --priv->outstanding_urbs;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ usb_serial_port_softint(port);
+}
+
+static int airprime_open(struct tty_struct *tty, struct usb_serial_port *port,
+ struct file *filp)
+{
+ struct airprime_private *priv = usb_get_serial_port_data(port);
+ struct usb_serial *serial = port->serial;
+ struct urb *urb;
+ char *buffer = NULL;
+ int i;
+ int result = 0;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ /* initialize our private data structure if it isn't already created */
+ if (!priv) {
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ result = -ENOMEM;
+ goto out;
+ }
+ spin_lock_init(&priv->lock);
+ usb_set_serial_port_data(port, priv);
+ }
+
+ /* Set some sane defaults */
+ priv->rts_state = 1;
+ priv->dtr_state = 1;
+
+ for (i = 0; i < NUM_READ_URBS; ++i) {
+ buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (!buffer) {
+ dev_err(&port->dev, "%s - out of memory.\n",
+ __func__);
+ result = -ENOMEM;
+ goto errout;
+ }
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb) {
+ kfree(buffer);
+ dev_err(&port->dev, "%s - no more urbs?\n",
+ __func__);
+ result = -ENOMEM;
+ goto errout;
+ }
+ usb_fill_bulk_urb(urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_out_endpointAddress),
+ buffer, buffer_size,
+ airprime_read_bulk_callback, port);
+ result = usb_submit_urb(urb, GFP_KERNEL);
+ if (result) {
+ usb_free_urb(urb);
+ kfree(buffer);
+ dev_err(&port->dev,
+ "%s - failed submitting read urb %d for port %d, error %d\n",
+ __func__, i, port->number, result);
+ goto errout;
+ }
+ /* remember this urb so we can kill it when the
+ port is closed */
+ priv->read_urbp[i] = urb;
+ }
+
+ airprime_send_setup(port);
+
+ goto out;
+
+ errout:
+ /* some error happened, cancel any submitted urbs and clean up
+ anything that got allocated successfully */
+
+ while (i-- != 0) {
+ urb = priv->read_urbp[i];
+ buffer = urb->transfer_buffer;
+ usb_kill_urb(urb);
+ usb_free_urb(urb);
+ kfree(buffer);
+ }
+
+ out:
+ return result;
+}
+
+static void airprime_close(struct tty_struct *tty,
+ struct usb_serial_port *port, struct file *filp)
+{
+ struct airprime_private *priv = usb_get_serial_port_data(port);
+ int i;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ priv->rts_state = 0;
+ priv->dtr_state = 0;
+
+ mutex_lock(&port->serial->disc_mutex);
+ if (!port->serial->disconnected)
+ airprime_send_setup(port);
+ mutex_unlock(&port->serial->disc_mutex);
+
+ for (i = 0; i < NUM_READ_URBS; ++i) {
+ usb_kill_urb(priv->read_urbp[i]);
+ kfree(priv->read_urbp[i]->transfer_buffer);
+ usb_free_urb(priv->read_urbp[i]);
+ }
+
+ /* free up private structure */
+ kfree(priv);
+ usb_set_serial_port_data(port, NULL);
+}
+
+static int airprime_write(struct tty_struct *tty, struct usb_serial_port *port,
+ const unsigned char *buf, int count)
+{
+ struct airprime_private *priv = usb_get_serial_port_data(port);
+ struct usb_serial *serial = port->serial;
+ struct urb *urb;
+ unsigned char *buffer;
+ unsigned long flags;
+ int status;
+ dbg("%s - port %d", __func__, port->number);
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (priv->outstanding_urbs > NUM_WRITE_URBS) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ dbg("%s - write limit hit\n", __func__);
+ return 0;
+ }
+ spin_unlock_irqrestore(&priv->lock, flags);
+ buffer = kmalloc(count, GFP_ATOMIC);
+ if (!buffer) {
+ dev_err(&port->dev, "out of memory\n");
+ return -ENOMEM;
+ }
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urb) {
+ dev_err(&port->dev, "no more free urbs\n");
+ kfree(buffer);
+ return -ENOMEM;
+ }
+ memcpy(buffer, buf, count);
+
+ usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
+
+ usb_fill_bulk_urb(urb, serial->dev,
+ usb_sndbulkpipe(serial->dev,
+ port->bulk_out_endpointAddress),
+ buffer, count,
+ airprime_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",
+ __func__, status);
+ count = status;
+ kfree(buffer);
+ } else {
+ spin_lock_irqsave(&priv->lock, flags);
+ ++priv->outstanding_urbs;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+ /* we are done with this urb, so let the host driver
+ * really free it when it is finished with it */
+ usb_free_urb(urb);
+ return count;
+}
+
+static struct usb_driver airprime_driver = {
+ .name = "airprime",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = id_table,
+ .no_dynamic_id = 1,
+};
+
+static struct usb_serial_driver airprime_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "airprime",
+ },
+ .usb_driver = &airprime_driver,
+ .id_table = id_table,
+ .open = airprime_open,
+ .close = airprime_close,
+ .write = airprime_write,
+};
+
+static int __init airprime_init(void)
+{
+ int retval;
+
+ airprime_device.num_ports = endpoints;
+ if (endpoints < 0 || endpoints >= MAX_BULK_EPS)
+ airprime_device.num_ports = NUM_BULK_EPS;
+
+ retval = usb_serial_register(&airprime_device);
+ if (retval)
+ return retval;
+ retval = usb_register(&airprime_driver);
+ if (retval)
+ usb_serial_deregister(&airprime_device);
+ return retval;
+}
+
+static void __exit airprime_exit(void)
+{
+ dbg("%s", __func__);
+
+ usb_deregister(&airprime_driver);
+ usb_serial_deregister(&airprime_device);
+}
+
+module_init(airprime_init);
+module_exit(airprime_exit);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled");
+module_param(buffer_size, int, 0);
+MODULE_PARM_DESC(buffer_size,
+ "Size of the transfer buffers in bytes (default 4096)");
+module_param(endpoints, int, 0);
+MODULE_PARM_DESC(endpoints, "Number of bulk EPs to configure (default 3)");