![Greg Kroah-Hartman](/assets/img/avatar_default.png)
This removes the ugly code that was copied from the keyspan driver and allocates the in urbs in a much shorter code path that can be understood easier. Also turned off the interrupt urb when no port was open as it's not nice to keep the bus busy for no good reason at all (this should be a power savings.) All in all, this saved over 40 lines of code and cleaned things up better. Cc: Kevin Lloyd <linux@sierrawireless.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
679 lines
18 KiB
C
679 lines
18 KiB
C
/*
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USB Driver for Sierra Wireless
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Copyright (C) 2006 Kevin Lloyd <linux@sierrawireless.com>
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IMPORTANT DISCLAIMER: This driver is not commercially supported by
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Sierra Wireless. Use at your own risk.
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This driver is free software; you can redistribute it and/or modify
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it under the terms of Version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
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Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
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*/
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#define DRIVER_VERSION "v.1.0.6"
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#define DRIVER_AUTHOR "Kevin Lloyd <linux@sierrawireless.com>"
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#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
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#include <linux/kernel.h>
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#include <linux/jiffies.h>
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#include <linux/errno.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
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{ USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
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{ USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
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{ USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
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{ USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
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{ USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless AirCard 595U */
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{ USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
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{ USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
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{ USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
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{ USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
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{ USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 */
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{ USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
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{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
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{ USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra PC 5220 */
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{ }
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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static struct usb_device_id id_table_1port [] = {
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{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
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{ USB_DEVICE(0x0F3D, 0x0112) }, /* AirPrime/Sierra PC 5220 */
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{ }
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};
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static struct usb_device_id id_table_3port [] = {
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{ USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
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{ USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
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{ USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
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{ USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
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{ USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
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{ USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless AirCard 595U */
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{ USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
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{ USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
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{ USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
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{ USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
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{ USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 */
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{ USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
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{ }
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};
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static struct usb_driver sierra_driver = {
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.name = "sierra",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table,
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.no_dynamic_id = 1,
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};
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static int debug;
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/* per port private data */
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#define N_IN_URB 4
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#define N_OUT_URB 4
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#define IN_BUFLEN 4096
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struct sierra_port_private {
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spinlock_t lock; /* lock the structure */
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int outstanding_urbs; /* number of out urbs in flight */
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/* Input endpoints and buffer for this port */
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struct urb *in_urbs[N_IN_URB];
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char in_buffer[N_IN_URB][IN_BUFLEN];
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/* Settings for the port */
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int rts_state; /* Handshaking pins (outputs) */
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int dtr_state;
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int cts_state; /* Handshaking pins (inputs) */
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int dsr_state;
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int dcd_state;
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int ri_state;
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};
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static int sierra_send_setup(struct usb_serial_port *port)
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{
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struct usb_serial *serial = port->serial;
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struct sierra_port_private *portdata;
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dbg("%s", __FUNCTION__);
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portdata = usb_get_serial_port_data(port);
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if (port->tty) {
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int val = 0;
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if (portdata->dtr_state)
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val |= 0x01;
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if (portdata->rts_state)
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val |= 0x02;
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return usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev, 0),
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0x22,0x21,val,0,NULL,0,USB_CTRL_SET_TIMEOUT);
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}
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return 0;
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}
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static void sierra_rx_throttle(struct usb_serial_port *port)
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{
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dbg("%s", __FUNCTION__);
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}
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static void sierra_rx_unthrottle(struct usb_serial_port *port)
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{
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dbg("%s", __FUNCTION__);
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}
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static void sierra_break_ctl(struct usb_serial_port *port, int break_state)
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{
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/* Unfortunately, I don't know how to send a break */
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dbg("%s", __FUNCTION__);
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}
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static void sierra_set_termios(struct usb_serial_port *port,
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struct ktermios *old_termios)
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{
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dbg("%s", __FUNCTION__);
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sierra_send_setup(port);
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}
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static int sierra_tiocmget(struct usb_serial_port *port, struct file *file)
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{
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unsigned int value;
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struct sierra_port_private *portdata;
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portdata = usb_get_serial_port_data(port);
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value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
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((portdata->dtr_state) ? TIOCM_DTR : 0) |
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((portdata->cts_state) ? TIOCM_CTS : 0) |
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((portdata->dsr_state) ? TIOCM_DSR : 0) |
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((portdata->dcd_state) ? TIOCM_CAR : 0) |
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((portdata->ri_state) ? TIOCM_RNG : 0);
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return value;
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}
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static int sierra_tiocmset(struct usb_serial_port *port, struct file *file,
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unsigned int set, unsigned int clear)
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{
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struct sierra_port_private *portdata;
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portdata = usb_get_serial_port_data(port);
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if (set & TIOCM_RTS)
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portdata->rts_state = 1;
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if (set & TIOCM_DTR)
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portdata->dtr_state = 1;
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if (clear & TIOCM_RTS)
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portdata->rts_state = 0;
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if (clear & TIOCM_DTR)
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portdata->dtr_state = 0;
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return sierra_send_setup(port);
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}
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static int sierra_ioctl(struct usb_serial_port *port, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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return -ENOIOCTLCMD;
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}
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static void sierra_outdat_callback(struct urb *urb)
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{
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struct usb_serial_port *port = urb->context;
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struct sierra_port_private *portdata = usb_get_serial_port_data(port);
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int status = urb->status;
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unsigned long flags;
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dbg("%s - port %d", __FUNCTION__, port->number);
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/* free up the transfer buffer, as usb_free_urb() does not do this */
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kfree(urb->transfer_buffer);
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if (status)
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dbg("%s - nonzero write bulk status received: %d",
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__FUNCTION__, status);
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spin_lock_irqsave(&portdata->lock, flags);
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--portdata->outstanding_urbs;
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spin_unlock_irqrestore(&portdata->lock, flags);
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usb_serial_port_softint(port);
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}
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/* Write */
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static int sierra_write(struct usb_serial_port *port,
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const unsigned char *buf, int count)
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{
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struct sierra_port_private *portdata = usb_get_serial_port_data(port);
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struct usb_serial *serial = port->serial;
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unsigned long flags;
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unsigned char *buffer;
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struct urb *urb;
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int status;
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portdata = usb_get_serial_port_data(port);
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dbg("%s: write (%d chars)", __FUNCTION__, count);
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spin_lock_irqsave(&portdata->lock, flags);
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if (portdata->outstanding_urbs > N_OUT_URB) {
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spin_unlock_irqrestore(&portdata->lock, flags);
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dbg("%s - write limit hit\n", __FUNCTION__);
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return 0;
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}
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portdata->outstanding_urbs++;
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spin_unlock_irqrestore(&portdata->lock, flags);
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buffer = kmalloc(count, GFP_ATOMIC);
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if (!buffer) {
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dev_err(&port->dev, "out of memory\n");
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count = -ENOMEM;
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goto error_no_buffer;
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}
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb) {
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dev_err(&port->dev, "no more free urbs\n");
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count = -ENOMEM;
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goto error_no_urb;
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}
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memcpy(buffer, buf, count);
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usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, buffer);
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usb_fill_bulk_urb(urb, serial->dev,
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usb_sndbulkpipe(serial->dev,
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port->bulk_out_endpointAddress),
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buffer, count, sierra_outdat_callback, port);
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/* send it down the pipe */
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status = usb_submit_urb(urb, GFP_ATOMIC);
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if (status) {
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dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
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"with status = %d\n", __FUNCTION__, status);
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count = status;
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goto error;
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}
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/* we are done with this urb, so let the host driver
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* really free it when it is finished with it */
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usb_free_urb(urb);
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return count;
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error:
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usb_free_urb(urb);
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error_no_urb:
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kfree(buffer);
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error_no_buffer:
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spin_lock_irqsave(&portdata->lock, flags);
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--portdata->outstanding_urbs;
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spin_unlock_irqrestore(&portdata->lock, flags);
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return count;
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}
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static void sierra_indat_callback(struct urb *urb)
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{
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int err;
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int endpoint;
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struct usb_serial_port *port;
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struct tty_struct *tty;
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unsigned char *data = urb->transfer_buffer;
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int status = urb->status;
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dbg("%s: %p", __FUNCTION__, urb);
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endpoint = usb_pipeendpoint(urb->pipe);
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port = (struct usb_serial_port *) urb->context;
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if (status) {
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dbg("%s: nonzero status: %d on endpoint %02x.",
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__FUNCTION__, status, endpoint);
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} else {
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tty = port->tty;
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if (urb->actual_length) {
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tty_buffer_request_room(tty, urb->actual_length);
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tty_insert_flip_string(tty, data, urb->actual_length);
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tty_flip_buffer_push(tty);
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} else {
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dbg("%s: empty read urb received", __FUNCTION__);
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}
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/* Resubmit urb so we continue receiving */
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if (port->open_count && status != -ESHUTDOWN) {
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err)
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dev_err(&port->dev, "resubmit read urb failed."
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"(%d)", err);
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}
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}
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return;
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}
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static void sierra_instat_callback(struct urb *urb)
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{
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int err;
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int status = urb->status;
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struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
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struct sierra_port_private *portdata = usb_get_serial_port_data(port);
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struct usb_serial *serial = port->serial;
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dbg("%s", __FUNCTION__);
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dbg("%s: urb %p port %p has data %p", __FUNCTION__,urb,port,portdata);
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if (status == 0) {
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struct usb_ctrlrequest *req_pkt =
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(struct usb_ctrlrequest *)urb->transfer_buffer;
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if (!req_pkt) {
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dbg("%s: NULL req_pkt\n", __FUNCTION__);
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return;
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}
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if ((req_pkt->bRequestType == 0xA1) &&
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(req_pkt->bRequest == 0x20)) {
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int old_dcd_state;
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unsigned char signals = *((unsigned char *)
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urb->transfer_buffer +
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sizeof(struct usb_ctrlrequest));
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dbg("%s: signal x%x", __FUNCTION__, signals);
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old_dcd_state = portdata->dcd_state;
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portdata->cts_state = 1;
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portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
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portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
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portdata->ri_state = ((signals & 0x08) ? 1 : 0);
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if (port->tty && !C_CLOCAL(port->tty) &&
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old_dcd_state && !portdata->dcd_state)
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tty_hangup(port->tty);
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} else {
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dbg("%s: type %x req %x", __FUNCTION__,
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req_pkt->bRequestType,req_pkt->bRequest);
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}
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} else
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dbg("%s: error %d", __FUNCTION__, status);
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/* Resubmit urb so we continue receiving IRQ data */
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if (status != -ESHUTDOWN) {
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urb->dev = serial->dev;
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err)
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dbg("%s: resubmit intr urb failed. (%d)",
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__FUNCTION__, err);
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}
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}
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static int sierra_write_room(struct usb_serial_port *port)
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{
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struct sierra_port_private *portdata = usb_get_serial_port_data(port);
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unsigned long flags;
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dbg("%s - port %d", __FUNCTION__, port->number);
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/* try to give a good number back based on if we have any free urbs at
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* this point in time */
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spin_lock_irqsave(&portdata->lock, flags);
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if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
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spin_unlock_irqrestore(&portdata->lock, flags);
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dbg("%s - write limit hit\n", __FUNCTION__);
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return 0;
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}
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spin_unlock_irqrestore(&portdata->lock, flags);
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return 2048;
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}
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static int sierra_chars_in_buffer(struct usb_serial_port *port)
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{
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dbg("%s - port %d", __FUNCTION__, port->number);
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/*
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* We can't really account for how much data we
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* have sent out, but hasn't made it through to the
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* device as we can't see the backend here, so just
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* tell the tty layer that everything is flushed.
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*/
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return 0;
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}
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static int sierra_open(struct usb_serial_port *port, struct file *filp)
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{
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struct sierra_port_private *portdata;
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struct usb_serial *serial = port->serial;
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int i;
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struct urb *urb;
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int result;
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__u16 set_mode_dzero = 0x0000;
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portdata = usb_get_serial_port_data(port);
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dbg("%s", __FUNCTION__);
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/* Set some sane defaults */
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portdata->rts_state = 1;
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portdata->dtr_state = 1;
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/* Reset low level data toggle and start reading from endpoints */
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for (i = 0; i < N_IN_URB; i++) {
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urb = portdata->in_urbs[i];
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if (!urb)
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continue;
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if (urb->dev != serial->dev) {
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dbg("%s: dev %p != %p", __FUNCTION__,
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urb->dev, serial->dev);
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continue;
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}
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/*
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* make sure endpoint data toggle is synchronized with the
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* device
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*/
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usb_clear_halt(urb->dev, urb->pipe);
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result = usb_submit_urb(urb, GFP_KERNEL);
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if (result) {
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dev_err(&port->dev, "submit urb %d failed (%d) %d",
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i, result, urb->transfer_buffer_length);
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}
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}
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port->tty->low_latency = 1;
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/* set mode to D0 */
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result = usb_control_msg(serial->dev,
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usb_rcvctrlpipe(serial->dev, 0),
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0x00, 0x40, set_mode_dzero, 0, NULL,
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0, USB_CTRL_SET_TIMEOUT);
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sierra_send_setup(port);
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/* start up the interrupt endpoint if we have one */
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if (port->interrupt_in_urb) {
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result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
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if (result)
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dev_err(&port->dev, "submit irq_in urb failed %d",
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result);
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}
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return 0;
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}
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static void sierra_close(struct usb_serial_port *port, struct file *filp)
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{
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int i;
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struct usb_serial *serial = port->serial;
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struct sierra_port_private *portdata;
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dbg("%s", __FUNCTION__);
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portdata = usb_get_serial_port_data(port);
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portdata->rts_state = 0;
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portdata->dtr_state = 0;
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if (serial->dev) {
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sierra_send_setup(port);
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/* Stop reading/writing urbs */
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for (i = 0; i < N_IN_URB; i++)
|
|
usb_kill_urb(portdata->in_urbs[i]);
|
|
}
|
|
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
|
|
port->tty = NULL;
|
|
}
|
|
|
|
static int sierra_startup(struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *port;
|
|
struct sierra_port_private *portdata;
|
|
struct urb *urb;
|
|
int i;
|
|
int j;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
/* Now setup per port private data */
|
|
for (i = 0; i < serial->num_ports; i++) {
|
|
port = serial->port[i];
|
|
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
|
|
if (!portdata) {
|
|
dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
|
|
__FUNCTION__, i);
|
|
return -ENOMEM;
|
|
}
|
|
spin_lock_init(&portdata->lock);
|
|
|
|
usb_set_serial_port_data(port, portdata);
|
|
|
|
/* initialize the in urbs */
|
|
for (j = 0; j < N_IN_URB; ++j) {
|
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (urb == NULL) {
|
|
dbg("%s: alloc for in port failed.",
|
|
__FUNCTION__);
|
|
continue;
|
|
}
|
|
/* Fill URB using supplied data. */
|
|
usb_fill_bulk_urb(urb, serial->dev,
|
|
usb_rcvbulkpipe(serial->dev,
|
|
port->bulk_in_endpointAddress),
|
|
portdata->in_buffer[j], IN_BUFLEN,
|
|
sierra_indat_callback, port);
|
|
portdata->in_urbs[j] = urb;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sierra_shutdown(struct usb_serial *serial)
|
|
{
|
|
int i, j;
|
|
struct usb_serial_port *port;
|
|
struct sierra_port_private *portdata;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
port = serial->port[i];
|
|
if (!port)
|
|
continue;
|
|
portdata = usb_get_serial_port_data(port);
|
|
if (!portdata)
|
|
continue;
|
|
|
|
for (j = 0; j < N_IN_URB; j++) {
|
|
usb_kill_urb(portdata->in_urbs[j]);
|
|
usb_free_urb(portdata->in_urbs[j]);
|
|
portdata->in_urbs[j] = NULL;
|
|
}
|
|
kfree(portdata);
|
|
usb_set_serial_port_data(port, NULL);
|
|
}
|
|
}
|
|
|
|
static struct usb_serial_driver sierra_1port_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "sierra1",
|
|
},
|
|
.description = "Sierra USB modem (1 port)",
|
|
.id_table = id_table_1port,
|
|
.usb_driver = &sierra_driver,
|
|
.num_interrupt_in = NUM_DONT_CARE,
|
|
.num_bulk_in = 1,
|
|
.num_bulk_out = 1,
|
|
.num_ports = 1,
|
|
.open = sierra_open,
|
|
.close = sierra_close,
|
|
.write = sierra_write,
|
|
.write_room = sierra_write_room,
|
|
.chars_in_buffer = sierra_chars_in_buffer,
|
|
.throttle = sierra_rx_throttle,
|
|
.unthrottle = sierra_rx_unthrottle,
|
|
.ioctl = sierra_ioctl,
|
|
.set_termios = sierra_set_termios,
|
|
.break_ctl = sierra_break_ctl,
|
|
.tiocmget = sierra_tiocmget,
|
|
.tiocmset = sierra_tiocmset,
|
|
.attach = sierra_startup,
|
|
.shutdown = sierra_shutdown,
|
|
.read_int_callback = sierra_instat_callback,
|
|
};
|
|
|
|
static struct usb_serial_driver sierra_3port_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "sierra3",
|
|
},
|
|
.description = "Sierra USB modem (3 port)",
|
|
.id_table = id_table_3port,
|
|
.usb_driver = &sierra_driver,
|
|
.num_interrupt_in = NUM_DONT_CARE,
|
|
.num_bulk_in = 3,
|
|
.num_bulk_out = 3,
|
|
.num_ports = 3,
|
|
.open = sierra_open,
|
|
.close = sierra_close,
|
|
.write = sierra_write,
|
|
.write_room = sierra_write_room,
|
|
.chars_in_buffer = sierra_chars_in_buffer,
|
|
.throttle = sierra_rx_throttle,
|
|
.unthrottle = sierra_rx_unthrottle,
|
|
.ioctl = sierra_ioctl,
|
|
.set_termios = sierra_set_termios,
|
|
.break_ctl = sierra_break_ctl,
|
|
.tiocmget = sierra_tiocmget,
|
|
.tiocmset = sierra_tiocmset,
|
|
.attach = sierra_startup,
|
|
.shutdown = sierra_shutdown,
|
|
.read_int_callback = sierra_instat_callback,
|
|
};
|
|
|
|
/* Functions used by new usb-serial code. */
|
|
static int __init sierra_init(void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&sierra_1port_device);
|
|
if (retval)
|
|
goto failed_1port_device_register;
|
|
retval = usb_serial_register(&sierra_3port_device);
|
|
if (retval)
|
|
goto failed_3port_device_register;
|
|
|
|
|
|
retval = usb_register(&sierra_driver);
|
|
if (retval)
|
|
goto failed_driver_register;
|
|
|
|
info(DRIVER_DESC ": " DRIVER_VERSION);
|
|
|
|
return 0;
|
|
|
|
failed_driver_register:
|
|
usb_serial_deregister(&sierra_3port_device);
|
|
failed_3port_device_register:
|
|
usb_serial_deregister(&sierra_1port_device);
|
|
failed_1port_device_register:
|
|
return retval;
|
|
}
|
|
|
|
static void __exit sierra_exit(void)
|
|
{
|
|
usb_deregister (&sierra_driver);
|
|
usb_serial_deregister(&sierra_1port_device);
|
|
usb_serial_deregister(&sierra_3port_device);
|
|
}
|
|
|
|
module_init(sierra_init);
|
|
module_exit(sierra_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#ifdef CONFIG_USB_DEBUG
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug messages");
|
|
#endif
|
|
|