+++ /dev/null
-/*
- * 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)");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff