| /* |
| * 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 */ |
| { USB_DEVICE(0x1410, 0x1110) }, /* Novatel Wireless Merlin CDMA */ |
| { USB_DEVICE(0x1410, 0x1130) }, /* Novatel Wireless S720 CDMA/EV-DO */ |
| { USB_DEVICE(0x1410, 0x2110) }, /* Novatel Wireless U720 CDMA/EV-DO */ |
| { USB_DEVICE(0x1410, 0x1430) }, /* Novatel Merlin XU870 HSDPA/3G */ |
| { USB_DEVICE(0x1410, 0x1100) }, /* ExpressCard34 Qualcomm 3G CDMA */ |
| { USB_DEVICE(0x413c, 0x8115) }, /* Dell Wireless HSDPA 5500 */ |
| { }, |
| }; |
| 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]; |
| }; |
| |
| 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; |
| |
| 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) { |
| 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", |
| __FUNCTION__, 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); |
| unsigned long flags; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| /* free up the transfer buffer, as usb_free_urb() does not do this */ |
| kfree (urb->transfer_buffer); |
| |
| if (urb->status) |
| dbg("%s - nonzero write bulk status received: %d", |
| __FUNCTION__, urb->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 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", __FUNCTION__, 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); |
| } |
| |
| 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", |
| __FUNCTION__); |
| result = -ENOMEM; |
| goto errout; |
| } |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| kfree(buffer); |
| dev_err(&port->dev, "%s - no more urbs?\n", |
| __FUNCTION__); |
| 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", |
| __FUNCTION__, i, port->number, result); |
| goto errout; |
| } |
| /* remember this urb so we can kill it when the port is closed */ |
| priv->read_urbp[i] = urb; |
| } |
| 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 usb_serial_port *port, struct file * filp) |
| { |
| struct airprime_private *priv = usb_get_serial_port_data(port); |
| int i; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| 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 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", __FUNCTION__, 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", __FUNCTION__); |
| 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, __FUNCTION__, 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", |
| __FUNCTION__, 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, |
| .num_interrupt_in = NUM_DONT_CARE, |
| .num_bulk_in = NUM_DONT_CARE, |
| .num_bulk_out = NUM_DONT_CARE, |
| .open = airprime_open, |
| .close = airprime_close, |
| .write = airprime_write, |
| }; |
| |
| static int __init airprime_init(void) |
| { |
| int retval; |
| |
| airprime_device.num_ports = |
| (endpoints > 0 && endpoints <= MAX_BULK_EPS) ? endpoints : 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", __FUNCTION__); |
| |
| 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)"); |