+/*
+ USB Driver for Sierra Wireless
+
+ Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
+
+ Copyright (C) 2008 - 2011 Elina Pasheva, Matthew Safar, Rory Filer
+ <linux@sierrawireless.com>
+
+ IMPORTANT DISCLAIMER: This driver is not commercially supported by
+ Sierra Wireless. Use at your own risk.
+
+ This driver is free software; you can redistribute it and/or modify
+ it under the terms of Version 2 of the GNU General Public License as
+ published by the Free Software Foundation.
+
+ Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
+ Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
+*/
+/* Uncomment to log function calls */
+/*#define DEBUG*/
+/* Uncomment to force power level set to auto when attaching a device */
+/*#define POWER_LEVEL_AUTO*/
+
+/* Sierra driver - kernel 3.0 */
+#define DRIVER_VERSION "v.1.7.40"
+#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
+#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
+
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include <asm/unaligned.h>
+
+#define SWIMS_USB_REQUEST_SetPower 0x00
+#define SWIMS_USB_REQUEST_GetFwAttr 0x06
+#define SWIMS_USB_REQUEST_SetNmea 0x07
+#define USB_REQUEST_TYPE_CLASS 0xA1
+#define USB_REQUEST_IFACE 0x20
+
+#define N_IN_URB_HM 8
+#define N_OUT_URB_HM 64
+#define N_IN_URB 4
+#define N_OUT_URB 4
+#define IN_BUFLEN 4096
+
+#define MAX_TRANSFER (PAGE_SIZE - 512)
+/* MAX_TRANSFER is chosen so that the VM is not stressed by
+ allocations > PAGE_SIZE and the number of packets in a page
+ is an integer 512 is the largest possible packet on EHCI */
+
+#define SWI_FW_ATTR_PM_MASK 0x02
+/* PORTION_LEN defines the length of device attribute buffer */
+#define PORTION_LEN 4096
+
+static int debug;
+static int nmea;
+
+/* sysfs attributes */
+static int sierra_create_sysfs_attrs(struct usb_serial_port *port);
+static int sierra_remove_sysfs_attrs(struct usb_serial_port *port);
+
+/* Used in interface blacklisting */
+struct sierra_iface_info {
+ const u32 infolen; /* number of interface numbers on blacklist */
+ const u8 *ifaceinfo; /* pointer to the array holding the numbers */
+};
+
+/* per interface statistics */
+struct sierra_intf_stats {
+ atomic_t rx_bytes; /* received bytes */
+ atomic_t indat_cb_cnt; /* indat callback count */
+ atomic_t indat_cb_fail; /* indat cb with error */
+
+ atomic_t tx_bytes; /* transmitted bytes */
+ atomic_t write_cnt; /* no. of writes */
+ atomic_t write_err; /* no. of failed writes */
+
+ atomic_t delayed_writes; /* no. of delayed writes */
+ atomic_t delayed_write_err; /* no. of delayed write errs */
+
+ atomic_t outdat_cb_cnt; /* outdat callback count */
+ atomic_t outdat_cb_fail; /* outdat cb with error */
+
+};
+
+struct sierra_intf_private {
+ spinlock_t susp_lock;
+ unsigned int suspended:1;
+ int in_flight;
+
+ struct sierra_intf_stats stats;
+};
+
+static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
+{
+ int result;
+ dev_dbg(&udev->dev, "%s\n", __func__);
+ result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ SWIMS_USB_REQUEST_SetPower, /* __u8 request */
+ USB_TYPE_VENDOR, /* __u8 request type */
+ swiState, /* __u16 value */
+ 0, /* __u16 index */
+ NULL, /* void *data */
+ 0, /* __u16 size */
+ USB_CTRL_SET_TIMEOUT); /* int timeout */
+ return result;
+}
+
+static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
+{
+ int result;
+ dev_dbg(&udev->dev, "%s\n", __func__);
+ result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
+ USB_TYPE_VENDOR, /* __u8 request type */
+ enable, /* __u16 value */
+ 0x0000, /* __u16 index */
+ NULL, /* void *data */
+ 0, /* __u16 size */
+ USB_CTRL_SET_TIMEOUT); /* int timeout */
+ return result;
+}
+
+static int sierra_get_fw_attr(struct usb_device *udev, u16 *data)
+{
+ int result;
+ u16 *attrdata;
+
+ dev_dbg(&udev->dev, "%s\n", __func__);
+
+ attrdata = kmalloc(sizeof(*attrdata), GFP_KERNEL);
+ if (!attrdata)
+ return -ENOMEM;
+
+ result = usb_control_msg(udev,
+ usb_rcvctrlpipe(udev, 0),
+ SWIMS_USB_REQUEST_GetFwAttr, /* __u8 request*/
+ USB_TYPE_VENDOR | USB_DIR_IN, /* request type*/
+ 0x0000, /* __u16 value */
+ 0x0000, /* __u16 index */
+ attrdata, /* void *data */
+ sizeof(*attrdata), /* _u16 size */
+ USB_CTRL_SET_TIMEOUT); /* in timeout */
+
+ if (result < 0) {
+ kfree(attrdata);
+ return -EIO;
+ }
+
+ *data = *attrdata;
+
+ kfree(attrdata);
+ return result;
+}
+
+static int sierra_calc_num_ports(struct usb_serial *serial)
+{
+ int num_ports = 0;
+ u8 ifnum, numendpoints;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
+ numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
+
+ /* Dummy interface present on some SKUs should be ignored */
+ if (ifnum == 0x99)
+ num_ports = 0;
+ else if (numendpoints <= 3)
+ num_ports = 1;
+ else
+ num_ports = (numendpoints-1)/2;
+ return num_ports;
+}
+
+static int is_blacklisted(const u8 ifnum,
+ const struct sierra_iface_info *blacklist)
+{
+ const u8 *info;
+ int i;
+
+ if (blacklist) {
+ info = blacklist->ifaceinfo;
+
+ for (i = 0; i < blacklist->infolen; i++) {
+ if (info[i] == ifnum)
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int is_himemory(const u8 ifnum,
+ const struct sierra_iface_info *himemorylist)
+{
+ const u8 *info;
+ int i;
+
+ if (himemorylist) {
+ info = himemorylist->ifaceinfo;
+
+ for (i=0; i < himemorylist->infolen; i++) {
+ if (info[i] == ifnum)
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int sierra_calc_interface(struct usb_serial *serial)
+{
+ int interface;
+ struct usb_interface *p_interface;
+ struct usb_host_interface *p_host_interface;
+
+ /* Get the interface structure pointer from the serial struct */
+ p_interface = serial->interface;
+
+ /* Get a pointer to the host interface structure */
+ p_host_interface = p_interface->cur_altsetting;
+
+ /* read the interface descriptor for this active altsetting
+ * to find out the interface number we are on */
+ interface = p_host_interface->desc.bInterfaceNumber;
+
+ return interface;
+}
+
+static int sierra_probe(struct usb_serial *serial,
+ const struct usb_device_id *id)
+{
+ int result = 0;
+ struct usb_device *udev;
+ struct sierra_intf_private *intfdata;
+ u8 ifnum;
+
+ udev = serial->dev;
+ dev_dbg(&udev->dev, "%s\n", __func__);
+
+ ifnum = sierra_calc_interface(serial);
+ /*
+ * If this interface supports more than 1 alternate
+ * select the 2nd one
+ */
+ if (serial->interface->num_altsetting == 2) {
+ dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
+ ifnum);
+ /* We know the alternate setting is for composite USB interface
+ * modems
+ */
+ usb_set_interface(udev, ifnum, 1);
+ }
+
+ /* ifnum could have changed - by calling usb_set_interface */
+ ifnum = sierra_calc_interface(serial);
+
+ if (is_blacklisted(ifnum,
+ (struct sierra_iface_info *)id->driver_info)) {
+ dev_dbg(&serial->dev->dev,
+ "Ignoring blacklisted interface #%d\n", ifnum);
+ return -ENODEV;
+ }
+
+ intfdata = serial->private = kzalloc(sizeof(struct sierra_intf_private),
+ GFP_KERNEL);
+ if (!intfdata)
+ return -ENOMEM;
+ spin_lock_init(&intfdata->susp_lock);
+
+ return result;
+}
+
+/* interfaces with higher memory requirements */
+static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
+static const struct sierra_iface_info typeA_interface_list = {
+ .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
+ .ifaceinfo = hi_memory_typeA_ifaces,
+};
+
+static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
+static const struct sierra_iface_info typeB_interface_list = {
+ .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
+ .ifaceinfo = hi_memory_typeB_ifaces,
+};
+
+/* 'blacklist' of interfaces not served by this driver */
+static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
+static const struct sierra_iface_info direct_ip_interface_blacklist = {
+ .infolen = ARRAY_SIZE( direct_ip_non_serial_ifaces ),
+ .ifaceinfo = direct_ip_non_serial_ifaces,
+};
+
+static const struct usb_device_id id_table [] = {
+ { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
+ { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
+ { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
+ { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
+
+ { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
+ { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
+ { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
+ { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
+ { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
+ { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
+ { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
+ { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
+ { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
+ { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
+ { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
+ { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
+ { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U/3G */
+ /* Sierra Wireless MC5728 */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0400, 0xFF, 0xFF, 0xFF) },
+
+ /* Sierra Wireless C597 */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
+ /* Sierra Wireless T598 */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
+ { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
+ { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
+ { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
+ { USB_DEVICE(0x114F, 0x6000) }, /* Sierra Wireless Q26 Elite */
+
+ { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
+ { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
+ { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
+ { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
+ { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
+ { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
+ { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
+ { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
+ { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
+ { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
+ { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
+ { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
+ { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
+ { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
+ { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
+ { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
+ { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
+ { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
+ { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
+ { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
+ { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
+ /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
+ { USB_DEVICE(0x1199, 0x683C) },
+ { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
+ /* Sierra Wireless MC8790, MC8791, MC8792 */
+ { USB_DEVICE(0x1199, 0x683E) },
+ { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
+ { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
+ { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
+ { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
+ { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
+ { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
+ { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
+ { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
+ /* Sierra Wireless C885 */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
+ /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
+ /* Sierra Wireless C22/C33 */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
+ /* Sierra Wireless HSPA Non-Composite Device */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
+ { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
+ /* Sierra Wireless Direct IP modems */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF),
+ .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
+ },
+ /* AT&T Direct IP modems */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
+ .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
+ },
+ /* Sierra Wireless Direct IP LTE modems */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
+ .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
+ },
+ /* AT&T Direct IP LTE modems */
+ { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
+ .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
+ },
+ /* Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
+ { USB_DEVICE(0x413C, 0x8133) },
+
+ { }
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+/* per port private data */
+struct sierra_port_private {
+ spinlock_t lock; /* lock the structure */
+ int outstanding_urbs; /* number of out urbs in flight */
+
+ struct usb_anchor active;
+ struct usb_anchor delayed;
+
+ int num_out_urbs;
+ int num_in_urbs;
+ /* Input endpoints and buffers for this port */
+ struct urb *in_urbs[N_IN_URB_HM];
+
+ /* Settings for the port */
+ int rts_state; /* Handshaking pins (outputs) */
+ int dtr_state;
+ int cts_state; /* Handshaking pins (inputs) */
+ int dsr_state;
+ int dcd_state;
+ int ri_state;
+ unsigned int opened:1;
+};
+
+static int sierra_send_setup(struct usb_serial_port *port)
+{
+ struct usb_serial *serial = port->serial;
+ struct sierra_port_private *portdata = usb_get_serial_port_data(port);
+ __u16 interface = 0;
+ int val = 0;
+ int do_send = 0;
+ int retval;
+
+ dev_dbg(&port->dev, "%s\n", __func__);
+
+ if (portdata->dtr_state)
+ val |= 0x01;
+ if (portdata->rts_state)
+ val |= 0x02;
+
+ /* If composite device then properly report interface */
+ if (serial->num_ports == 1) {
+ interface = sierra_calc_interface(serial);
+ /* Control message is sent only to interfaces with
+ * interrupt_in endpoints
+ */
+ if (port->interrupt_in_urb) {
+ /* send control message */
+ do_send = 1;
+ }
+ }
+
+ /* Otherwise the need to do non-composite mapping */
+ else {
+ if (port->bulk_out_endpointAddress == 2)
+ interface = 0;
+ else if (port->bulk_out_endpointAddress == 4)
+ interface = 1;
+ else if (port->bulk_out_endpointAddress == 5)
+ interface = 2;
+
+ do_send = 1;
+ }
+ if (!do_send)
+ return 0;
+
+ usb_autopm_get_interface(serial->interface);
+ retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
+ usb_autopm_put_interface(serial->interface);
+
+ return retval;
+}
+
+static void sierra_set_termios(struct tty_struct *tty,
+ struct usb_serial_port *port, struct ktermios *old_termios)
+{
+ dev_dbg(&port->dev, "%s\n", __func__);
+ tty_termios_copy_hw(tty->termios, old_termios);
+ sierra_send_setup(port);
+}
+
+static int sierra_tiocmget(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ unsigned int value;
+ struct sierra_port_private *portdata;
+
+ dev_dbg(&port->dev, "%s\n", __func__);
+ portdata = usb_get_serial_port_data(port);
+
+ value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
+ ((portdata->dtr_state) ? TIOCM_DTR : 0) |
+ ((portdata->cts_state) ? TIOCM_CTS : 0) |
+ ((portdata->dsr_state) ? TIOCM_DSR : 0) |
+ ((portdata->dcd_state) ? TIOCM_CAR : 0) |
+ ((portdata->ri_state) ? TIOCM_RNG : 0);
+
+ return value;
+}
+
+static int sierra_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct sierra_port_private *portdata;
+
+ portdata = usb_get_serial_port_data(port);
+
+ if (set & TIOCM_RTS)
+ portdata->rts_state = 1;
+ if (set & TIOCM_DTR)
+ portdata->dtr_state = 1;
+
+ if (clear & TIOCM_RTS)
+ portdata->rts_state = 0;
+ if (clear & TIOCM_DTR)
+ portdata->dtr_state = 0;
+ return sierra_send_setup(port);
+}
+
+static void sierra_release_urb(struct urb *urb)
+{
+ struct usb_serial_port *port;
+ if (urb) {
+ port = urb->context;
+ dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
+ usb_free_urb(urb);
+ }
+}
+
+/* Sysfs Attributes */
+
+static ssize_t show_suspend_status(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct usb_serial_port *port;
+ struct sierra_port_private *portdata;
+ struct sierra_intf_private *intfdata;
+ unsigned long flags;
+ unsigned int flag_suspended = 0;
+
+ port = to_usb_serial_port(dev);
+ portdata = usb_get_serial_port_data(port);
+ intfdata = port->serial->private;
+
+ spin_lock_irqsave(&intfdata->susp_lock, flags);
+ flag_suspended = intfdata->suspended;
+ spin_unlock_irqrestore(&intfdata->susp_lock, flags);
+
+ return snprintf(buf, PORTION_LEN, "%i\n", flag_suspended);
+}
+
+static ssize_t show_stats(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct usb_serial_port *port;
+ struct sierra_intf_private *intfdata;
+
+ port = to_usb_serial_port(dev);
+ intfdata = port->serial->private;
+
+ return snprintf(buf, PORTION_LEN,
+ "rx: %i B\tindat: %i\tindat err: %i\n"
+ "tx: %i B\toutdat: %i\toutdat err: %i\n"
+ "writes: %i\t\twrite err: %i\n"
+ "delayed writes: %i\tdelayed write err: %i\n",
+ atomic_read(&intfdata->stats.rx_bytes), atomic_read(&intfdata->stats.indat_cb_cnt), atomic_read(&intfdata->stats.indat_cb_fail),
+ atomic_read(&intfdata->stats.tx_bytes), atomic_read(&intfdata->stats.outdat_cb_cnt), atomic_read(&intfdata->stats.outdat_cb_fail),
+ atomic_read(&intfdata->stats.write_cnt), atomic_read(&intfdata->stats.write_err),
+ atomic_read(&intfdata->stats.delayed_writes), atomic_read(&intfdata->stats.delayed_write_err)
+ );
+}
+
+/* Read only suspend status */
+static DEVICE_ATTR(suspend_status, S_IWUSR | S_IRUGO, show_suspend_status,
+ NULL);
+
+/* Read only statistics */
+static DEVICE_ATTR(stats, S_IWUSR | S_IRUGO, show_stats, NULL);
+
+static int sierra_create_sysfs_attrs(struct usb_serial_port *port)
+{
+ int result = 0;
+
+ result = device_create_file(&port->dev, &dev_attr_stats);
+ if (unlikely (result < 0))
+ return result;
+ return device_create_file(&port->dev, &dev_attr_suspend_status);
+}
+
+static int sierra_remove_sysfs_attrs(struct usb_serial_port *port)
+{
+ device_remove_file(&port->dev, &dev_attr_stats);
+ device_remove_file(&port->dev, &dev_attr_suspend_status);
+ return 0;
+}
+
+static void sierra_outdat_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ struct sierra_port_private *portdata = usb_get_serial_port_data(port);
+ struct sierra_intf_private *intfdata;
+ int status = urb->status;
+
+ dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
+ intfdata = port->serial->private;
+
+ usb_autopm_put_interface_async(port->serial->interface);
+
+ atomic_inc(&intfdata->stats.outdat_cb_cnt);
+
+ if (status) {
+ dev_dbg(&port->dev, "%s - nonzero write bulk status "
+ "received: %d\n", __func__, status);
+ atomic_inc(&intfdata->stats.outdat_cb_fail);
+ }
+
+ spin_lock(&portdata->lock);
+ --portdata->outstanding_urbs;
+ spin_unlock(&portdata->lock);
+
+ spin_lock(&intfdata->susp_lock);
+ --intfdata->in_flight;
+ spin_unlock(&intfdata->susp_lock);
+
+ usb_serial_port_softint(port);
+}
+
+/* Write */
+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;
+
+ dev_dbg(&port->dev, "%s: write (%zu bytes)\n", __func__, writesize);
+
+ intfdata = serial->private;
+
+ spin_lock_irqsave(&portdata->lock, flags);
+ if (portdata->outstanding_urbs > portdata->num_out_urbs) {
+ spin_unlock_irqrestore(&portdata->lock, flags);
+ dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
+ return 0;
+ }
+ portdata->outstanding_urbs++;
+ spin_unlock_irqrestore(&portdata->lock, flags);
+
+ retval = usb_autopm_get_interface_async(serial->interface);
+ if (unlikely(retval < 0)) {
+ spin_lock_irqsave(&portdata->lock, flags);
+ portdata->outstanding_urbs--;
+ spin_unlock_irqrestore(&portdata->lock, flags);
+ return retval;
+ }
+
+ buffer = kmalloc(writesize, GFP_ATOMIC);
+ if (!buffer) {
+ dev_err(&port->dev, "out of memory\n");
+ spin_lock_irqsave(&portdata->lock, flags);
+ --portdata->outstanding_urbs;
+ spin_unlock_irqrestore(&portdata->lock, flags);
+ usb_autopm_put_interface_async(serial->interface);
+ return -ENOMEM;
+ }
+
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urb) {
+ dev_err(&port->dev, "no more free urbs\n");
+ kfree(buffer);
+ spin_lock_irqsave(&portdata->lock, flags);
+ --portdata->outstanding_urbs;
+ spin_unlock_irqrestore(&portdata->lock, flags);
+ usb_autopm_put_interface_async(serial->interface);
+ return -ENOMEM;
+ }
+
+ 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 and release the
+ * transfer buffer
+ */
+ urb->transfer_flags |= (URB_ZERO_PACKET | URB_FREE_BUFFER);
+
+ spin_lock_irqsave(&intfdata->susp_lock, flags);
+
+ if (intfdata->suspended) {
+ usb_anchor_urb(urb, &portdata->delayed);
+ spin_unlock_irqrestore(&intfdata->susp_lock, flags);
+ /* release our reference to this urb, the USB core will
+ * eventually free it entirely */
+ usb_free_urb(urb);
+ return writesize;
+ }
+ 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);
+ usb_free_urb(urb);
+ spin_lock_irqsave(&portdata->lock, flags);
+ --portdata->outstanding_urbs;
+ spin_unlock_irqrestore(&portdata->lock, flags);
+ usb_autopm_put_interface_async(serial->interface);
+ atomic_inc(&intfdata->stats.write_err);
+ return retval;
+ } else {
+ intfdata->in_flight++;
+ spin_unlock_irqrestore(&intfdata->susp_lock, flags);
+ atomic_inc(&intfdata->stats.write_cnt);
+ atomic_add(writesize, &intfdata->stats.tx_bytes);
+ }
+ /* release our reference to this urb, the USB core will eventually
+ * free it entirely */
+ usb_free_urb(urb);
+
+ return writesize;
+}
+
+static void sierra_indat_callback(struct urb *urb)
+{
+ int err;
+ int endpoint;
+ struct usb_serial_port *port = urb->context;
+ struct tty_struct *tty;
+ struct sierra_intf_private *intfdata;
+ unsigned char *data = urb->transfer_buffer;
+ int status = urb->status;
+
+ endpoint = usb_pipeendpoint(urb->pipe);
+
+ dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
+
+ intfdata = port->serial->private;
+
+ atomic_inc(&intfdata->stats.indat_cb_cnt); /* indat calls */
+
+ if (status) {
+ dev_dbg(&port->dev, "%s: nonzero status: %d on"
+ " endpoint %02x\n", __func__, status, endpoint);
+ atomic_inc(&intfdata->stats.indat_cb_fail); /* indat fails */
+ } else {
+ if (urb->actual_length) {
+ tty = tty_port_tty_get(&port->port);
+ if (tty) {
+ tty_insert_flip_string(tty, data,
+ urb->actual_length);
+ tty_flip_buffer_push(tty);
+
+ tty_kref_put(tty);
+ /* tty invalid after this point */
+ /* rx'd bytes */
+ atomic_add(urb->actual_length,
+ &intfdata->stats.rx_bytes);
+ 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 (status != -ESHUTDOWN && status != -ENOENT && status != -ENODEV) {
+ usb_mark_last_busy(port->serial->dev);
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err && err != -ENODEV)
+ 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: %p\n", __func__, urb);
+
+ if (status == 0) {
+ struct usb_ctrlrequest *req_pkt =
+ (struct usb_ctrlrequest *)urb->transfer_buffer;
+
+ const u16 *sigp = (u16 *)(req_pkt + 1);
+ /* usb_ctrlrequest we parsed is followed by two bytes of data
+ * make sure we received that many bytes
+ */
+ if (urb->actual_length >= sizeof(*req_pkt) + sizeof(*sigp) &&
+ req_pkt->bRequestType == USB_REQUEST_TYPE_CLASS &&
+ req_pkt->bRequest == USB_REQUEST_IFACE) {
+ int old_dcd_state;
+ const u16 signals = get_unaligned_le16(sigp);
+ struct tty_struct *tty;
+
+ dev_dbg(&port->dev, "%s: signal 0x%x\n", __func__,
+ signals);
+
+ old_dcd_state = portdata->dcd_state;
+ /* Note: CTS from modem is in reverse logic! */
+ portdata->cts_state = ((signals & 0x100) ? 0 : 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 {
+ /* dump the data we don't understand to log */
+ usb_serial_debug_data(1, &port->dev, __func__,
+ urb->actual_length, urb->transfer_buffer);
+ }
+ } else
+ dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
+
+ /* Resubmit urb so we continue receiving IRQ data */
+ if (status != -ESHUTDOWN && status != -ENOENT && status != -ENODEV) {
+ usb_mark_last_busy(serial->dev);
+ urb->dev = serial->dev;
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err && err != -ENODEV)
+ 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;
+ int retval;
+
+ 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 */
+ retval = MAX_TRANSFER;
+
+ spin_lock_irqsave(&portdata->lock, flags);
+ if (portdata->outstanding_urbs >= portdata->num_out_urbs) {
+ retval = 0;
+ }
+ spin_unlock_irqrestore(&portdata->lock, flags);
+
+ return retval;
+}
+
+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 < portdata->num_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 < portdata->num_in_urbs; i++) {
+ urb = portdata->in_urbs[i];
+ if (!urb)
+ continue;
+ urb->transfer_flags |= URB_FREE_BUFFER;
+ 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 urb *urb;
+ 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;
+
+ usb_autopm_get_interface(serial->interface);
+
+ if (serial->dev) {
+ mutex_lock(&serial->disc_mutex);
+ if (!serial->disconnected)
+ 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 < portdata->num_in_urbs; i++) {
+ sierra_release_urb(portdata->in_urbs[i]);
+ portdata->in_urbs[i] = NULL;
+ }
+ while((urb = usb_get_from_anchor(&portdata->delayed))) {
+ sierra_release_urb(urb);
+ usb_autopm_put_interface(serial->interface);
+ }
+ /* wait for active to finish */
+ usb_wait_anchor_empty_timeout(&portdata->active, 500);
+ usb_kill_anchored_urbs(&portdata->active);
+
+ }
+}
+
+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 < portdata->num_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);
+
+ /* reset outstanding out urbs counter */
+ spin_lock_irq(&portdata->lock);
+ portdata->outstanding_urbs = 0;
+ spin_unlock_irq(&portdata->lock);
+
+ err = sierra_submit_rx_urbs(port, GFP_KERNEL);
+ if (err) {
+ /* do everything as in close() but do not call close() because
+ * usbserial calls sierra_open() with mutex taken;
+ * then if we call sierra_close() inside sierra_open() we
+ * violate 'no nested mutexes' kernel condition
+ */
+ portdata->rts_state = 0;
+ portdata->dtr_state = 0;
+ usb_autopm_get_interface(serial->interface);
+ /* Stop reading urbs */
+ sierra_stop_rx_urbs(port);
+ /* .. and release them */
+ for (i = 0; i < portdata->num_in_urbs; i++) {
+ sierra_release_urb(portdata->in_urbs[i]);
+ portdata->in_urbs[i] = NULL;
+ }
+ while((urb = usb_get_from_anchor(&portdata->delayed))) {
+ sierra_release_urb(urb);
+ usb_autopm_put_interface(serial->interface);
+ }
+ /* wait for active to finish */
+ usb_wait_anchor_empty_timeout(&portdata->active, 500);
+ usb_kill_anchored_urbs(&portdata->active);
+ /* restore balance for autopm */
+ usb_autopm_put_interface(serial->interface);
+ return err;
+ }
+ sierra_send_setup(port);
+
+ 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 = NULL;
+ struct sierra_port_private *portdata = NULL;
+ struct sierra_iface_info *himemoryp = NULL;
+ int i;
+ u8 ifnum;
+ u16 fw_attr;
+ int result;
+
+ 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);
+
+ if (serial->num_ports) {
+ /* Note: One big piece of memory is allocated for all ports
+ * private data in one shot. This memory is split into equal
+ * pieces for each port.
+ */
+ portdata = (struct sierra_port_private *)kzalloc
+ (sizeof(*portdata) * serial->num_ports, GFP_KERNEL);
+ if (!portdata) {
+ dev_dbg(&serial->dev->dev, "%s: No memory!\n", __func__);
+ return -ENOMEM;
+ }
+ }
+
+ /* Now setup per port private data */
+ for (i = 0; i < serial->num_ports; i++, portdata++) {
+ port = serial->port[i];
+ /* Initialize selected members of private data because these
+ * may be referred to right away */
+ spin_lock_init(&portdata->lock);
+ init_usb_anchor(&portdata->active);
+ init_usb_anchor(&portdata->delayed);
+
+ portdata->cts_state = 1;
+
+ ifnum = i;
+ /* Assume low memory requirements */
+ portdata->num_out_urbs = N_OUT_URB;
+ portdata->num_in_urbs = N_IN_URB;
+
+ /* Determine actual memory requirements */
+ if (serial->num_ports == 1) {
+ /* Get interface number for composite device */
+ ifnum = sierra_calc_interface(serial);
+ himemoryp =
+ (struct sierra_iface_info *)&typeB_interface_list;
+ if (is_himemory(ifnum, himemoryp)) {
+ portdata->num_out_urbs = N_OUT_URB_HM;
+ portdata->num_in_urbs = N_IN_URB_HM;
+ }
+ }
+ else {
+ himemoryp =
+ (struct sierra_iface_info *)&typeA_interface_list;
+ if (is_himemory(i, himemoryp)) {
+ portdata->num_out_urbs = N_OUT_URB_HM;
+ portdata->num_in_urbs = N_IN_URB_HM;
+ }
+ }
+ dev_dbg(&serial->dev->dev,
+ "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
+ ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
+ /* Set the port private data pointer */
+ usb_set_serial_port_data(port, portdata);
+ }
+ serial->interface->needs_remote_wakeup = 1;
+
+ result = sierra_get_fw_attr(serial->dev, &fw_attr);
+ if (result == sizeof(fw_attr) && (fw_attr & SWI_FW_ATTR_PM_MASK) ) {
+ dev_info(&serial->dev->dev,
+ "APM supported, enabling autosuspend.\n");
+/*******************************************************************************
+ * If you want the default /sys/bus/usb/devices/.../.../power/level to be forced
+ * to auto, the following needs to be compiled in.
+ */
+#ifdef POWER_LEVEL_AUTO
+ /* make power level default be 'auto' */
+ usb_enable_autosuspend(serial->dev);
+#endif
+ } else {
+ usb_disable_autosuspend(serial->dev);
+ }
+
+ return 0;
+}
+
+static void sierra_release(struct usb_serial *serial)
+{
+ int i;
+ struct usb_serial_port *port;
+ struct sierra_intf_private *intfdata = serial->private;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ if (serial->num_ports > 0) {
+ port = serial->port[0];
+ if (port)
+ /* Note: The entire piece of memory that was allocated
+ * in the startup routine can be released by passing
+ * a pointer to the beginning of the piece.
+ * This address corresponds to the address of the chunk
+ * that was given to port 0.
+ */
+ kfree(usb_get_serial_port_data(port));
+ }
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ port = serial->port[i];
+ if (!port)
+ continue;
+ usb_set_serial_port_data(port, NULL);
+ }
+ kfree(intfdata);
+}
+
+#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;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ intfdata = serial->private;
+ spin_lock_irq(&intfdata->susp_lock);
+
+ if (message.event & PM_EVENT_AUTO) {
+ if (intfdata->in_flight) {
+ spin_unlock_irq(&intfdata->susp_lock);
+ return -EBUSY;
+ }
+ }
+ 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;
+ int len;
+ int failed_submits;
+
+ dev_dbg(&serial->dev->dev, "%s\n", __func__);
+
+ 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);
+ failed_submits = 0;
+ while ((urb = usb_get_from_anchor(&portdata->delayed))) {
+ usb_anchor_urb(urb, &portdata->active);
+ intfdata->in_flight++;
+ len = urb->transfer_buffer_length;
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err < 0) {
+ intfdata->in_flight--;
+ usb_unanchor_urb(urb);
+ failed_submits++;
+ atomic_inc(&intfdata->stats.delayed_write_err);
+ /* fix pm_usage_cnt */
+ usb_autopm_put_interface_async(
+ port->serial->interface);
+ } else {
+ atomic_inc(&intfdata->stats.delayed_writes);
+ atomic_add(len, &intfdata->stats.tx_bytes);
+ }
+ /* release urb - usb_get_from_anchor increased kref */
+ usb_free_urb(urb);
+ }
+
+ if (portdata->opened) {
+ err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
+ if (err)
+ ec++;
+ }
+ if (failed_submits) {
+ /* fix outstanding_urbs counter */
+ spin_lock(&portdata->lock); /* assuming irq disabled */
+ portdata->outstanding_urbs -= failed_submits;
+ spin_unlock(&portdata->lock);
+ /* unblock a writer */
+ usb_serial_port_softint(port);
+ }
+ }
+ intfdata->suspended = 0;
+ spin_unlock_irq(&intfdata->susp_lock);
+
+ return ec ? -EIO : 0;
+}
+#else
+#define sierra_suspend NULL
+#define sierra_resume NULL
+#endif
+
+static int sierra_reset_resume(struct usb_interface *intf)
+{
+ struct usb_serial *serial = usb_get_intfdata(intf);
+ dev_err(&serial->dev->dev, "%s\n", __func__);
+ return usb_serial_resume(intf);
+}
+
+static struct usb_driver sierra_driver = {
+ .name = "sierra",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .suspend = usb_serial_suspend,
+ .resume = usb_serial_resume,
+ .reset_resume = sierra_reset_resume,
+ .id_table = id_table,
+
+ .no_dynamic_id = 1,
+ .supports_autosuspend = 1,
+};
+
+
+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,
+ .port_probe = sierra_create_sysfs_attrs,
+ .port_remove = sierra_remove_sysfs_attrs,
+ .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");
projects / openwrt / openwrt.git / commitdiff