forked from Minki/linux
b64dc0a597
This patch presents fixes for the autosuspend feature implementation in sierra usb serial driver in functions sierra_open(), sierra_close() and stop_read_write_urbs(). The patch "sierra_close() must resume the device before it notifies it of a closure" submitted by Oliver Neukum on Wed, October 14 has been merged as fix in sierra_close() function. The bug fix in sierra_open() function restores the autopm interface state on error condition. The bug fix in in stop_read_write_urbs() function assures that both receive and interrupt urbs are recycled. Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1071 lines
29 KiB
C
1071 lines
29 KiB
C
/*
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USB Driver for Sierra Wireless
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Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
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Copyright (C) 2008, 2009 Elina Pasheva, Matthew Safar, Rory Filer
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<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.1.3.8"
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#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
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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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#define SWIMS_USB_REQUEST_SetPower 0x00
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#define SWIMS_USB_REQUEST_SetNmea 0x07
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#define N_IN_URB 8
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#define N_OUT_URB 64
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#define IN_BUFLEN 4096
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#define MAX_TRANSFER (PAGE_SIZE - 512)
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/* MAX_TRANSFER is chosen so that the VM is not stressed by
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allocations > PAGE_SIZE and the number of packets in a page
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is an integer 512 is the largest possible packet on EHCI */
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static int debug;
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static int nmea;
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/* Used in interface blacklisting */
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struct sierra_iface_info {
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const u32 infolen; /* number of interface numbers on blacklist */
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const u8 *ifaceinfo; /* pointer to the array holding the numbers */
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};
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struct sierra_intf_private {
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spinlock_t susp_lock;
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unsigned int suspended:1;
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int in_flight;
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};
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static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
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{
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int result;
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dev_dbg(&udev->dev, "%s\n", __func__);
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result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
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SWIMS_USB_REQUEST_SetPower, /* __u8 request */
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USB_TYPE_VENDOR, /* __u8 request type */
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swiState, /* __u16 value */
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0, /* __u16 index */
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NULL, /* void *data */
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0, /* __u16 size */
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USB_CTRL_SET_TIMEOUT); /* int timeout */
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return result;
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}
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static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
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{
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int result;
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dev_dbg(&udev->dev, "%s\n", __func__);
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result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
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SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
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USB_TYPE_VENDOR, /* __u8 request type */
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enable, /* __u16 value */
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0x0000, /* __u16 index */
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NULL, /* void *data */
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0, /* __u16 size */
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USB_CTRL_SET_TIMEOUT); /* int timeout */
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return result;
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}
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static int sierra_calc_num_ports(struct usb_serial *serial)
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{
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int num_ports = 0;
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u8 ifnum, numendpoints;
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dev_dbg(&serial->dev->dev, "%s\n", __func__);
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ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
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numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
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/* Dummy interface present on some SKUs should be ignored */
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if (ifnum == 0x99)
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num_ports = 0;
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else if (numendpoints <= 3)
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num_ports = 1;
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else
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num_ports = (numendpoints-1)/2;
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return num_ports;
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}
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static int is_blacklisted(const u8 ifnum,
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const struct sierra_iface_info *blacklist)
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{
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const u8 *info;
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int i;
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if (blacklist) {
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info = blacklist->ifaceinfo;
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for (i = 0; i < blacklist->infolen; i++) {
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if (info[i] == ifnum)
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return 1;
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}
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}
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return 0;
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}
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static int sierra_calc_interface(struct usb_serial *serial)
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{
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int interface;
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struct usb_interface *p_interface;
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struct usb_host_interface *p_host_interface;
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dev_dbg(&serial->dev->dev, "%s\n", __func__);
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/* Get the interface structure pointer from the serial struct */
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p_interface = serial->interface;
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/* Get a pointer to the host interface structure */
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p_host_interface = p_interface->cur_altsetting;
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/* read the interface descriptor for this active altsetting
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* to find out the interface number we are on
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*/
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interface = p_host_interface->desc.bInterfaceNumber;
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return interface;
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}
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static int sierra_probe(struct usb_serial *serial,
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const struct usb_device_id *id)
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{
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int result = 0;
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struct usb_device *udev;
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struct sierra_intf_private *data;
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u8 ifnum;
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udev = serial->dev;
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dev_dbg(&udev->dev, "%s\n", __func__);
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ifnum = sierra_calc_interface(serial);
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/*
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* If this interface supports more than 1 alternate
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* select the 2nd one
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*/
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if (serial->interface->num_altsetting == 2) {
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dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
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ifnum);
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/* We know the alternate setting is 1 for the MC8785 */
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usb_set_interface(udev, ifnum, 1);
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}
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/* ifnum could have changed - by calling usb_set_interface */
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ifnum = sierra_calc_interface(serial);
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if (is_blacklisted(ifnum,
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(struct sierra_iface_info *)id->driver_info)) {
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dev_dbg(&serial->dev->dev,
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"Ignoring blacklisted interface #%d\n", ifnum);
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return -ENODEV;
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}
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data = serial->private = kzalloc(sizeof(struct sierra_intf_private), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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spin_lock_init(&data->susp_lock);
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return result;
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}
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static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
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static const struct sierra_iface_info direct_ip_interface_blacklist = {
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.infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
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.ifaceinfo = direct_ip_non_serial_ifaces,
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};
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
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{ USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
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{ USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
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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, 0x0220) }, /* Sierra Wireless MC5725 */
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{ USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
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{ USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
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{ USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
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{ USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
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{ USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
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{ USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
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{ USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
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/* Sierra Wireless C597 */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
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/* Sierra Wireless T598 */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
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{ USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
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{ USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
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{ USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
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{ USB_DEVICE(0x1199, 0x0029) }, /* Sierra Wireless Device */
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{ USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
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{ USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
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{ USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
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{ USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
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{ USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
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{ USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
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{ USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
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{ USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
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{ USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
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{ USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
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{ USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
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{ USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
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{ USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
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{ USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
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{ USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
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{ USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
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{ USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
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{ USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
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{ USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
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{ USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
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{ USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
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/* Sierra Wireless MC8790, MC8791, MC8792 Composite */
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{ USB_DEVICE(0x1199, 0x683C) },
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{ USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
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/* Sierra Wireless MC8790, MC8791, MC8792 */
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{ USB_DEVICE(0x1199, 0x683E) },
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{ USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
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{ USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
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{ USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
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{ USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
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{ USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
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{ USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
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{ USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
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{ USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
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/* Sierra Wireless C885 */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
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/* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
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/* Sierra Wireless C22/C33 */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
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/* Sierra Wireless HSPA Non-Composite Device */
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
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{ USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
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{ USB_DEVICE(0x1199, 0x68A3), /* Sierra Wireless Direct IP modems */
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.driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
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},
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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_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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.suspend = usb_serial_suspend,
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.resume = usb_serial_resume,
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.id_table = id_table,
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.no_dynamic_id = 1,
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.supports_autosuspend = 1,
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};
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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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struct usb_anchor active;
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struct usb_anchor delayed;
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/* Input endpoints and buffers for this port */
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struct urb *in_urbs[N_IN_URB];
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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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unsigned int opened:1;
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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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__u16 interface = 0;
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int val = 0;
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int do_send = 0;
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int retval;
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dev_dbg(&port->dev, "%s\n", __func__);
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portdata = usb_get_serial_port_data(port);
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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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/* If composite device then properly report interface */
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if (serial->num_ports == 1) {
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interface = sierra_calc_interface(serial);
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/* Control message is sent only to interfaces with
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* interrupt_in endpoints
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*/
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if (port->interrupt_in_urb) {
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/* send control message */
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do_send = 1;
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}
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}
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/* Otherwise the need to do non-composite mapping */
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else {
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if (port->bulk_out_endpointAddress == 2)
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interface = 0;
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else if (port->bulk_out_endpointAddress == 4)
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interface = 1;
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else if (port->bulk_out_endpointAddress == 5)
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interface = 2;
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do_send = 1;
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}
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if (!do_send)
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return 0;
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usb_autopm_get_interface(serial->interface);
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retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
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0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
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usb_autopm_put_interface(serial->interface);
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return retval;
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}
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static void sierra_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port, struct ktermios *old_termios)
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{
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dev_dbg(&port->dev, "%s\n", __func__);
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tty_termios_copy_hw(tty->termios, old_termios);
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sierra_send_setup(port);
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}
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static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
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{
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struct usb_serial_port *port = tty->driver_data;
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unsigned int value;
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struct sierra_port_private *portdata;
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dev_dbg(&port->dev, "%s\n", __func__);
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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 tty_struct *tty, struct file *file,
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unsigned int set, unsigned int clear)
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{
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struct usb_serial_port *port = tty->driver_data;
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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 void sierra_release_urb(struct urb *urb)
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{
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struct usb_serial_port *port;
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if (urb) {
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port = urb->context;
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dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
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kfree(urb->transfer_buffer);
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usb_free_urb(urb);
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}
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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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struct sierra_intf_private *intfdata;
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int status = urb->status;
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dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
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intfdata = port->serial->private;
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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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usb_autopm_put_interface_async(port->serial->interface);
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if (status)
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dev_dbg(&port->dev, "%s - nonzero write bulk status "
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"received: %d\n", __func__, status);
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spin_lock(&portdata->lock);
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--portdata->outstanding_urbs;
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spin_unlock(&portdata->lock);
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spin_lock(&intfdata->susp_lock);
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--intfdata->in_flight;
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spin_unlock(&intfdata->susp_lock);
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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 tty_struct *tty, struct usb_serial_port *port,
|
|
const unsigned char *buf, int count)
|
|
{
|
|
struct sierra_port_private *portdata = usb_get_serial_port_data(port);
|
|
struct sierra_intf_private *intfdata;
|
|
struct usb_serial *serial = port->serial;
|
|
unsigned long flags;
|
|
unsigned char *buffer;
|
|
struct urb *urb;
|
|
size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
|
|
int retval = 0;
|
|
|
|
/* verify that we actually have some data to write */
|
|
if (count == 0)
|
|
return 0;
|
|
|
|
portdata = usb_get_serial_port_data(port);
|
|
intfdata = serial->private;
|
|
|
|
dev_dbg(&port->dev, "%s: write (%zd bytes)\n", __func__, writesize);
|
|
spin_lock_irqsave(&portdata->lock, flags);
|
|
dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
|
|
portdata->outstanding_urbs);
|
|
if (portdata->outstanding_urbs > N_OUT_URB) {
|
|
spin_unlock_irqrestore(&portdata->lock, flags);
|
|
dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
|
|
return 0;
|
|
}
|
|
portdata->outstanding_urbs++;
|
|
dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
|
|
portdata->outstanding_urbs);
|
|
spin_unlock_irqrestore(&portdata->lock, flags);
|
|
|
|
retval = usb_autopm_get_interface_async(serial->interface);
|
|
if (retval < 0) {
|
|
spin_lock_irqsave(&portdata->lock, flags);
|
|
portdata->outstanding_urbs--;
|
|
spin_unlock_irqrestore(&portdata->lock, flags);
|
|
goto error_simple;
|
|
}
|
|
|
|
buffer = kmalloc(writesize, GFP_ATOMIC);
|
|
if (!buffer) {
|
|
dev_err(&port->dev, "out of memory\n");
|
|
retval = -ENOMEM;
|
|
goto error_no_buffer;
|
|
}
|
|
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
|
if (!urb) {
|
|
dev_err(&port->dev, "no more free urbs\n");
|
|
retval = -ENOMEM;
|
|
goto error_no_urb;
|
|
}
|
|
|
|
memcpy(buffer, buf, writesize);
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
|
|
|
|
usb_fill_bulk_urb(urb, serial->dev,
|
|
usb_sndbulkpipe(serial->dev,
|
|
port->bulk_out_endpointAddress),
|
|
buffer, writesize, sierra_outdat_callback, port);
|
|
|
|
/* Handle the need to send a zero length packet */
|
|
urb->transfer_flags |= URB_ZERO_PACKET;
|
|
|
|
spin_lock_irqsave(&intfdata->susp_lock, flags);
|
|
|
|
if (intfdata->suspended) {
|
|
usb_anchor_urb(urb, &portdata->delayed);
|
|
spin_unlock_irqrestore(&intfdata->susp_lock, flags);
|
|
goto skip_power;
|
|
} else {
|
|
usb_anchor_urb(urb, &portdata->active);
|
|
}
|
|
/* send it down the pipe */
|
|
retval = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (retval) {
|
|
usb_unanchor_urb(urb);
|
|
spin_unlock_irqrestore(&intfdata->susp_lock, flags);
|
|
dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
|
|
"with status = %d\n", __func__, retval);
|
|
goto error;
|
|
} else {
|
|
intfdata->in_flight++;
|
|
spin_unlock_irqrestore(&intfdata->susp_lock, flags);
|
|
}
|
|
|
|
skip_power:
|
|
/* 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 writesize;
|
|
error:
|
|
usb_free_urb(urb);
|
|
error_no_urb:
|
|
kfree(buffer);
|
|
error_no_buffer:
|
|
spin_lock_irqsave(&portdata->lock, flags);
|
|
--portdata->outstanding_urbs;
|
|
dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
|
|
portdata->outstanding_urbs);
|
|
spin_unlock_irqrestore(&portdata->lock, flags);
|
|
usb_autopm_put_interface_async(serial->interface);
|
|
error_simple:
|
|
return retval;
|
|
}
|
|
|
|
static void sierra_indat_callback(struct urb *urb)
|
|
{
|
|
int err;
|
|
int endpoint;
|
|
struct usb_serial_port *port;
|
|
struct tty_struct *tty;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
int status = urb->status;
|
|
|
|
endpoint = usb_pipeendpoint(urb->pipe);
|
|
port = urb->context;
|
|
|
|
dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
|
|
|
|
if (status) {
|
|
dev_dbg(&port->dev, "%s: nonzero status: %d on"
|
|
" endpoint %02x\n", __func__, status, endpoint);
|
|
} else {
|
|
if (urb->actual_length) {
|
|
tty = tty_port_tty_get(&port->port);
|
|
|
|
tty_buffer_request_room(tty, urb->actual_length);
|
|
tty_insert_flip_string(tty, data, urb->actual_length);
|
|
tty_flip_buffer_push(tty);
|
|
|
|
tty_kref_put(tty);
|
|
usb_serial_debug_data(debug, &port->dev, __func__,
|
|
urb->actual_length, data);
|
|
} else {
|
|
dev_dbg(&port->dev, "%s: empty read urb"
|
|
" received\n", __func__);
|
|
}
|
|
}
|
|
|
|
/* Resubmit urb so we continue receiving */
|
|
if (port->port.count && status != -ESHUTDOWN && status != -EPERM) {
|
|
usb_mark_last_busy(port->serial->dev);
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (err)
|
|
dev_err(&port->dev, "resubmit read urb failed."
|
|
"(%d)\n", err);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static void sierra_instat_callback(struct urb *urb)
|
|
{
|
|
int err;
|
|
int status = urb->status;
|
|
struct usb_serial_port *port = urb->context;
|
|
struct sierra_port_private *portdata = usb_get_serial_port_data(port);
|
|
struct usb_serial *serial = port->serial;
|
|
|
|
dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
|
|
urb, port, portdata);
|
|
|
|
if (status == 0) {
|
|
struct usb_ctrlrequest *req_pkt =
|
|
(struct usb_ctrlrequest *)urb->transfer_buffer;
|
|
|
|
if (!req_pkt) {
|
|
dev_dbg(&port->dev, "%s: NULL req_pkt\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
if ((req_pkt->bRequestType == 0xA1) &&
|
|
(req_pkt->bRequest == 0x20)) {
|
|
int old_dcd_state;
|
|
unsigned char signals = *((unsigned char *)
|
|
urb->transfer_buffer +
|
|
sizeof(struct usb_ctrlrequest));
|
|
struct tty_struct *tty;
|
|
|
|
dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
|
|
signals);
|
|
|
|
old_dcd_state = portdata->dcd_state;
|
|
portdata->cts_state = 1;
|
|
portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
|
|
portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
|
|
portdata->ri_state = ((signals & 0x08) ? 1 : 0);
|
|
|
|
tty = tty_port_tty_get(&port->port);
|
|
if (tty && !C_CLOCAL(tty) &&
|
|
old_dcd_state && !portdata->dcd_state)
|
|
tty_hangup(tty);
|
|
tty_kref_put(tty);
|
|
} else {
|
|
dev_dbg(&port->dev, "%s: type %x req %x\n",
|
|
__func__, req_pkt->bRequestType,
|
|
req_pkt->bRequest);
|
|
}
|
|
} else
|
|
dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
|
|
|
|
/* Resubmit urb so we continue receiving IRQ data */
|
|
if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) {
|
|
usb_mark_last_busy(serial->dev);
|
|
urb->dev = serial->dev;
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (err)
|
|
dev_err(&port->dev, "%s: resubmit intr urb "
|
|
"failed. (%d)\n", __func__, err);
|
|
}
|
|
}
|
|
|
|
static int sierra_write_room(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct sierra_port_private *portdata = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
|
|
dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
|
|
|
|
/* try to give a good number back based on if we have any free urbs at
|
|
* this point in time */
|
|
spin_lock_irqsave(&portdata->lock, flags);
|
|
if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
|
|
spin_unlock_irqrestore(&portdata->lock, flags);
|
|
dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
|
|
return 0;
|
|
}
|
|
spin_unlock_irqrestore(&portdata->lock, flags);
|
|
|
|
return 2048;
|
|
}
|
|
|
|
static void sierra_stop_rx_urbs(struct usb_serial_port *port)
|
|
{
|
|
int i;
|
|
struct sierra_port_private *portdata = usb_get_serial_port_data(port);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++)
|
|
usb_kill_urb(portdata->in_urbs[i]);
|
|
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
}
|
|
|
|
static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
|
|
{
|
|
int ok_cnt;
|
|
int err = -EINVAL;
|
|
int i;
|
|
struct urb *urb;
|
|
struct sierra_port_private *portdata = usb_get_serial_port_data(port);
|
|
|
|
ok_cnt = 0;
|
|
for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
|
|
urb = portdata->in_urbs[i];
|
|
if (!urb)
|
|
continue;
|
|
err = usb_submit_urb(urb, mem_flags);
|
|
if (err) {
|
|
dev_err(&port->dev, "%s: submit urb failed: %d\n",
|
|
__func__, err);
|
|
} else {
|
|
ok_cnt++;
|
|
}
|
|
}
|
|
|
|
if (ok_cnt && port->interrupt_in_urb) {
|
|
err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
|
|
if (err) {
|
|
dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
|
|
__func__, err);
|
|
}
|
|
}
|
|
|
|
if (ok_cnt > 0) /* at least one rx urb submitted */
|
|
return 0;
|
|
else
|
|
return err;
|
|
}
|
|
|
|
static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
|
|
int dir, void *ctx, int len,
|
|
gfp_t mem_flags,
|
|
usb_complete_t callback)
|
|
{
|
|
struct urb *urb;
|
|
u8 *buf;
|
|
|
|
if (endpoint == -1)
|
|
return NULL;
|
|
|
|
urb = usb_alloc_urb(0, mem_flags);
|
|
if (urb == NULL) {
|
|
dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
|
|
__func__, endpoint);
|
|
return NULL;
|
|
}
|
|
|
|
buf = kmalloc(len, mem_flags);
|
|
if (buf) {
|
|
/* Fill URB using supplied data */
|
|
usb_fill_bulk_urb(urb, serial->dev,
|
|
usb_sndbulkpipe(serial->dev, endpoint) | dir,
|
|
buf, len, callback, ctx);
|
|
|
|
/* debug */
|
|
dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
|
|
dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
|
|
} else {
|
|
dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
|
|
dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
|
|
|
|
sierra_release_urb(urb);
|
|
urb = NULL;
|
|
}
|
|
|
|
return urb;
|
|
}
|
|
|
|
static void sierra_close(struct usb_serial_port *port)
|
|
{
|
|
int i;
|
|
struct usb_serial *serial = port->serial;
|
|
struct sierra_port_private *portdata;
|
|
struct sierra_intf_private *intfdata = port->serial->private;
|
|
|
|
|
|
dev_dbg(&port->dev, "%s\n", __func__);
|
|
portdata = usb_get_serial_port_data(port);
|
|
|
|
portdata->rts_state = 0;
|
|
portdata->dtr_state = 0;
|
|
|
|
if (serial->dev) {
|
|
mutex_lock(&serial->disc_mutex);
|
|
if (!serial->disconnected) {
|
|
serial->interface->needs_remote_wakeup = 0;
|
|
usb_autopm_get_interface(serial->interface);
|
|
sierra_send_setup(port);
|
|
}
|
|
mutex_unlock(&serial->disc_mutex);
|
|
spin_lock_irq(&intfdata->susp_lock);
|
|
portdata->opened = 0;
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
|
|
|
|
|
/* Stop reading urbs */
|
|
sierra_stop_rx_urbs(port);
|
|
/* .. and release them */
|
|
for (i = 0; i < N_IN_URB; i++) {
|
|
sierra_release_urb(portdata->in_urbs[i]);
|
|
portdata->in_urbs[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct sierra_port_private *portdata;
|
|
struct usb_serial *serial = port->serial;
|
|
struct sierra_intf_private *intfdata = serial->private;
|
|
int i;
|
|
int err;
|
|
int endpoint;
|
|
struct urb *urb;
|
|
|
|
portdata = usb_get_serial_port_data(port);
|
|
|
|
dev_dbg(&port->dev, "%s\n", __func__);
|
|
|
|
/* Set some sane defaults */
|
|
portdata->rts_state = 1;
|
|
portdata->dtr_state = 1;
|
|
|
|
|
|
endpoint = port->bulk_in_endpointAddress;
|
|
for (i = 0; i < ARRAY_SIZE(portdata->in_urbs); i++) {
|
|
urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
|
|
IN_BUFLEN, GFP_KERNEL,
|
|
sierra_indat_callback);
|
|
portdata->in_urbs[i] = urb;
|
|
}
|
|
/* clear halt condition */
|
|
usb_clear_halt(serial->dev,
|
|
usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
|
|
|
|
err = sierra_submit_rx_urbs(port, GFP_KERNEL);
|
|
if (err) {
|
|
/* get rid of everything as in close */
|
|
sierra_close(port);
|
|
/* restore balance for autopm */
|
|
usb_autopm_put_interface(serial->interface);
|
|
return err;
|
|
}
|
|
sierra_send_setup(port);
|
|
|
|
serial->interface->needs_remote_wakeup = 1;
|
|
spin_lock_irq(&intfdata->susp_lock);
|
|
portdata->opened = 1;
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
|
usb_autopm_put_interface(serial->interface);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void sierra_dtr_rts(struct usb_serial_port *port, int on)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct sierra_port_private *portdata;
|
|
|
|
portdata = usb_get_serial_port_data(port);
|
|
portdata->rts_state = on;
|
|
portdata->dtr_state = on;
|
|
|
|
if (serial->dev) {
|
|
mutex_lock(&serial->disc_mutex);
|
|
if (!serial->disconnected)
|
|
sierra_send_setup(port);
|
|
mutex_unlock(&serial->disc_mutex);
|
|
}
|
|
}
|
|
|
|
static int sierra_startup(struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *port;
|
|
struct sierra_port_private *portdata;
|
|
int i;
|
|
|
|
dev_dbg(&serial->dev->dev, "%s\n", __func__);
|
|
|
|
/* Set Device mode to D0 */
|
|
sierra_set_power_state(serial->dev, 0x0000);
|
|
|
|
/* Check NMEA and set */
|
|
if (nmea)
|
|
sierra_vsc_set_nmea(serial->dev, 1);
|
|
|
|
/* 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) {
|
|
dev_dbg(&port->dev, "%s: kmalloc for "
|
|
"sierra_port_private (%d) failed!.\n",
|
|
__func__, i);
|
|
return -ENOMEM;
|
|
}
|
|
spin_lock_init(&portdata->lock);
|
|
init_usb_anchor(&portdata->active);
|
|
init_usb_anchor(&portdata->delayed);
|
|
/* Set the port private data pointer */
|
|
usb_set_serial_port_data(port, portdata);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sierra_release(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
struct usb_serial_port *port;
|
|
struct sierra_port_private *portdata;
|
|
|
|
dev_dbg(&serial->dev->dev, "%s\n", __func__);
|
|
|
|
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;
|
|
kfree(portdata);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static void stop_read_write_urbs(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
struct usb_serial_port *port;
|
|
struct sierra_port_private *portdata;
|
|
|
|
/* Stop reading/writing urbs */
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
port = serial->port[i];
|
|
portdata = usb_get_serial_port_data(port);
|
|
sierra_stop_rx_urbs(port);
|
|
usb_kill_anchored_urbs(&portdata->active);
|
|
}
|
|
}
|
|
|
|
static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
|
|
{
|
|
struct sierra_intf_private *intfdata;
|
|
int b;
|
|
|
|
if (serial->dev->auto_pm) {
|
|
intfdata = serial->private;
|
|
spin_lock_irq(&intfdata->susp_lock);
|
|
b = intfdata->in_flight;
|
|
|
|
if (b) {
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
|
return -EBUSY;
|
|
} else {
|
|
intfdata->suspended = 1;
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
|
}
|
|
}
|
|
stop_read_write_urbs(serial);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sierra_resume(struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *port;
|
|
struct sierra_intf_private *intfdata = serial->private;
|
|
struct sierra_port_private *portdata;
|
|
struct urb *urb;
|
|
int ec = 0;
|
|
int i, err;
|
|
|
|
spin_lock_irq(&intfdata->susp_lock);
|
|
for (i = 0; i < serial->num_ports; i++) {
|
|
port = serial->port[i];
|
|
portdata = usb_get_serial_port_data(port);
|
|
|
|
while ((urb = usb_get_from_anchor(&portdata->delayed))) {
|
|
usb_anchor_urb(urb, &portdata->active);
|
|
intfdata->in_flight++;
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (err < 0) {
|
|
intfdata->in_flight--;
|
|
usb_unanchor_urb(urb);
|
|
usb_scuttle_anchored_urbs(&portdata->delayed);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (portdata->opened) {
|
|
err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
|
|
if (err)
|
|
ec++;
|
|
}
|
|
}
|
|
intfdata->suspended = 0;
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
|
|
|
return ec ? -EIO : 0;
|
|
}
|
|
#else
|
|
#define sierra_suspend NULL
|
|
#define sierra_resume NULL
|
|
#endif
|
|
|
|
static struct usb_serial_driver sierra_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "sierra",
|
|
},
|
|
.description = "Sierra USB modem",
|
|
.id_table = id_table,
|
|
.usb_driver = &sierra_driver,
|
|
.calc_num_ports = sierra_calc_num_ports,
|
|
.probe = sierra_probe,
|
|
.open = sierra_open,
|
|
.close = sierra_close,
|
|
.dtr_rts = sierra_dtr_rts,
|
|
.write = sierra_write,
|
|
.write_room = sierra_write_room,
|
|
.set_termios = sierra_set_termios,
|
|
.tiocmget = sierra_tiocmget,
|
|
.tiocmset = sierra_tiocmset,
|
|
.attach = sierra_startup,
|
|
.release = sierra_release,
|
|
.suspend = sierra_suspend,
|
|
.resume = sierra_resume,
|
|
.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_device);
|
|
if (retval)
|
|
goto failed_device_register;
|
|
|
|
|
|
retval = usb_register(&sierra_driver);
|
|
if (retval)
|
|
goto failed_driver_register;
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
|
|
return 0;
|
|
|
|
failed_driver_register:
|
|
usb_serial_deregister(&sierra_device);
|
|
failed_device_register:
|
|
return retval;
|
|
}
|
|
|
|
static void __exit sierra_exit(void)
|
|
{
|
|
usb_deregister(&sierra_driver);
|
|
usb_serial_deregister(&sierra_device);
|
|
}
|
|
|
|
module_init(sierra_init);
|
|
module_exit(sierra_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(nmea, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(nmea, "NMEA streaming");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug messages");
|