Root/package/sierra-directip/src/sierra.c

1/*
2  USB Driver for Sierra Wireless
3
4  Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>,
5
6  Copyright (C) 2008 - 2011 Elina Pasheva, Matthew Safar, Rory Filer
7            <linux@sierrawireless.com>
8
9  IMPORTANT DISCLAIMER: This driver is not commercially supported by
10  Sierra Wireless. Use at your own risk.
11
12  This driver is free software; you can redistribute it and/or modify
13  it under the terms of Version 2 of the GNU General Public License as
14  published by the Free Software Foundation.
15
16  Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
17  Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
18*/
19/* Uncomment to log function calls */
20/*#define DEBUG*/
21/* Uncomment to force power level set to auto when attaching a device */
22/*#define POWER_LEVEL_AUTO*/
23
24/* Sierra driver - kernel 3.0 */
25#define DRIVER_VERSION "v.1.7.40"
26#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
27#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
28
29#include <linux/kernel.h>
30#include <linux/jiffies.h>
31#include <linux/errno.h>
32#include <linux/tty.h>
33#include <linux/slab.h>
34#include <linux/tty_flip.h>
35#include <linux/module.h>
36#include <linux/usb.h>
37#include <linux/usb/serial.h>
38#include <asm/unaligned.h>
39
40#define SWIMS_USB_REQUEST_SetPower 0x00
41#define SWIMS_USB_REQUEST_GetFwAttr 0x06
42#define SWIMS_USB_REQUEST_SetNmea 0x07
43#define USB_REQUEST_TYPE_CLASS 0xA1
44#define USB_REQUEST_IFACE 0x20
45
46#define N_IN_URB_HM 8
47#define N_OUT_URB_HM 64
48#define N_IN_URB 4
49#define N_OUT_URB 4
50#define IN_BUFLEN 4096
51
52#define MAX_TRANSFER (PAGE_SIZE - 512)
53/* MAX_TRANSFER is chosen so that the VM is not stressed by
54   allocations > PAGE_SIZE and the number of packets in a page
55   is an integer 512 is the largest possible packet on EHCI */
56
57#define SWI_FW_ATTR_PM_MASK 0x02
58/* PORTION_LEN defines the length of device attribute buffer */
59#define PORTION_LEN 4096
60
61static int debug;
62static int nmea;
63
64/* sysfs attributes */
65static int sierra_create_sysfs_attrs(struct usb_serial_port *port);
66static int sierra_remove_sysfs_attrs(struct usb_serial_port *port);
67
68/* Used in interface blacklisting */
69struct sierra_iface_info {
70    const u32 infolen; /* number of interface numbers on blacklist */
71    const u8 *ifaceinfo; /* pointer to the array holding the numbers */
72};
73
74/* per interface statistics */
75struct sierra_intf_stats {
76    atomic_t rx_bytes; /* received bytes */
77    atomic_t indat_cb_cnt; /* indat callback count */
78    atomic_t indat_cb_fail; /* indat cb with error */
79
80    atomic_t tx_bytes; /* transmitted bytes */
81    atomic_t write_cnt; /* no. of writes */
82    atomic_t write_err; /* no. of failed writes */
83
84    atomic_t delayed_writes; /* no. of delayed writes */
85    atomic_t delayed_write_err; /* no. of delayed write errs */
86
87    atomic_t outdat_cb_cnt; /* outdat callback count */
88    atomic_t outdat_cb_fail; /* outdat cb with error */
89
90};
91
92struct sierra_intf_private {
93    spinlock_t susp_lock;
94    unsigned int suspended:1;
95    int in_flight;
96
97    struct sierra_intf_stats stats;
98};
99
100static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
101{
102    int result;
103    dev_dbg(&udev->dev, "%s\n", __func__);
104    result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
105            SWIMS_USB_REQUEST_SetPower, /* __u8 request */
106            USB_TYPE_VENDOR, /* __u8 request type */
107            swiState, /* __u16 value */
108            0, /* __u16 index */
109            NULL, /* void *data */
110            0, /* __u16 size */
111            USB_CTRL_SET_TIMEOUT); /* int timeout */
112    return result;
113}
114
115static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
116{
117    int result;
118    dev_dbg(&udev->dev, "%s\n", __func__);
119    result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
120            SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
121            USB_TYPE_VENDOR, /* __u8 request type */
122            enable, /* __u16 value */
123            0x0000, /* __u16 index */
124            NULL, /* void *data */
125            0, /* __u16 size */
126            USB_CTRL_SET_TIMEOUT); /* int timeout */
127    return result;
128}
129
130static int sierra_get_fw_attr(struct usb_device *udev, u16 *data)
131{
132    int result;
133    u16 *attrdata;
134
135    dev_dbg(&udev->dev, "%s\n", __func__);
136
137    attrdata = kmalloc(sizeof(*attrdata), GFP_KERNEL);
138    if (!attrdata)
139        return -ENOMEM;
140
141    result = usb_control_msg(udev,
142                usb_rcvctrlpipe(udev, 0),
143                SWIMS_USB_REQUEST_GetFwAttr, /* __u8 request*/
144                USB_TYPE_VENDOR | USB_DIR_IN, /* request type*/
145                0x0000, /* __u16 value */
146                0x0000, /* __u16 index */
147                attrdata, /* void *data */
148                sizeof(*attrdata), /* _u16 size */
149                USB_CTRL_SET_TIMEOUT); /* in timeout */
150
151    if (result < 0) {
152        kfree(attrdata);
153        return -EIO;
154    }
155
156    *data = *attrdata;
157
158    kfree(attrdata);
159    return result;
160}
161
162static int sierra_calc_num_ports(struct usb_serial *serial)
163{
164    int num_ports = 0;
165    u8 ifnum, numendpoints;
166
167    dev_dbg(&serial->dev->dev, "%s\n", __func__);
168
169    ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
170    numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
171
172    /* Dummy interface present on some SKUs should be ignored */
173    if (ifnum == 0x99)
174        num_ports = 0;
175    else if (numendpoints <= 3)
176        num_ports = 1;
177    else
178        num_ports = (numendpoints-1)/2;
179    return num_ports;
180}
181
182static int is_blacklisted(const u8 ifnum,
183                const struct sierra_iface_info *blacklist)
184{
185    const u8 *info;
186    int i;
187
188    if (blacklist) {
189        info = blacklist->ifaceinfo;
190
191        for (i = 0; i < blacklist->infolen; i++) {
192            if (info[i] == ifnum)
193                return 1;
194        }
195    }
196    return 0;
197}
198
199static int is_himemory(const u8 ifnum,
200                const struct sierra_iface_info *himemorylist)
201{
202    const u8 *info;
203    int i;
204
205    if (himemorylist) {
206        info = himemorylist->ifaceinfo;
207
208        for (i=0; i < himemorylist->infolen; i++) {
209            if (info[i] == ifnum)
210                return 1;
211        }
212    }
213    return 0;
214}
215
216static int sierra_calc_interface(struct usb_serial *serial)
217{
218    int interface;
219    struct usb_interface *p_interface;
220    struct usb_host_interface *p_host_interface;
221
222    /* Get the interface structure pointer from the serial struct */
223    p_interface = serial->interface;
224
225    /* Get a pointer to the host interface structure */
226    p_host_interface = p_interface->cur_altsetting;
227
228    /* read the interface descriptor for this active altsetting
229     * to find out the interface number we are on */
230    interface = p_host_interface->desc.bInterfaceNumber;
231
232    return interface;
233}
234
235static int sierra_probe(struct usb_serial *serial,
236            const struct usb_device_id *id)
237{
238    int result = 0;
239    struct usb_device *udev;
240    struct sierra_intf_private *intfdata;
241    u8 ifnum;
242
243    udev = serial->dev;
244    dev_dbg(&udev->dev, "%s\n", __func__);
245
246    ifnum = sierra_calc_interface(serial);
247    /*
248     * If this interface supports more than 1 alternate
249     * select the 2nd one
250     */
251    if (serial->interface->num_altsetting == 2) {
252        dev_dbg(&udev->dev, "Selecting alt setting for interface %d\n",
253            ifnum);
254        /* We know the alternate setting is for composite USB interface
255         * modems
256         */
257        usb_set_interface(udev, ifnum, 1);
258    }
259
260    /* ifnum could have changed - by calling usb_set_interface */
261    ifnum = sierra_calc_interface(serial);
262
263    if (is_blacklisted(ifnum,
264                (struct sierra_iface_info *)id->driver_info)) {
265        dev_dbg(&serial->dev->dev,
266            "Ignoring blacklisted interface #%d\n", ifnum);
267        return -ENODEV;
268    }
269
270    intfdata = serial->private = kzalloc(sizeof(struct sierra_intf_private),
271                        GFP_KERNEL);
272    if (!intfdata)
273        return -ENOMEM;
274    spin_lock_init(&intfdata->susp_lock);
275
276    return result;
277}
278
279/* interfaces with higher memory requirements */
280static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
281static const struct sierra_iface_info typeA_interface_list = {
282    .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
283    .ifaceinfo = hi_memory_typeA_ifaces,
284};
285
286static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
287static const struct sierra_iface_info typeB_interface_list = {
288    .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
289    .ifaceinfo = hi_memory_typeB_ifaces,
290};
291
292/* 'blacklist' of interfaces not served by this driver */
293static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11 };
294static const struct sierra_iface_info direct_ip_interface_blacklist = {
295    .infolen = ARRAY_SIZE( direct_ip_non_serial_ifaces ),
296    .ifaceinfo = direct_ip_non_serial_ifaces,
297};
298
299static const struct usb_device_id id_table [] = {
300    { USB_DEVICE(0x0F3D, 0x0112) }, /* Airprime/Sierra PC 5220 */
301    { USB_DEVICE(0x03F0, 0x1B1D) }, /* HP ev2200 a.k.a MC5720 */
302    { USB_DEVICE(0x03F0, 0x1E1D) }, /* HP hs2300 a.k.a MC8775 */
303    { USB_DEVICE(0x03F0, 0x211D) }, /* HP ev2210 a.k.a MC5725 */
304
305    { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
306    { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
307    { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
308    { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
309    { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
310    { USB_DEVICE(0x1199, 0x0022) }, /* Sierra Wireless EM5725 */
311    { USB_DEVICE(0x1199, 0x0024) }, /* Sierra Wireless MC5727 */
312    { USB_DEVICE(0x1199, 0x0224) }, /* Sierra Wireless MC5727 */
313    { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
314    { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
315    { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless AirCard 580 */
316    { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
317    { USB_DEVICE(0x1199, 0x0301) }, /* Sierra Wireless USB Dongle 250U/3G */
318    /* Sierra Wireless MC5728 */
319    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0400, 0xFF, 0xFF, 0xFF) },
320
321    /* Sierra Wireless C597 */
322    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) },
323    /* Sierra Wireless T598 */
324    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0025, 0xFF, 0xFF, 0xFF) },
325    { USB_DEVICE(0x1199, 0x0026) }, /* Sierra Wireless T11 */
326    { USB_DEVICE(0x1199, 0x0027) }, /* Sierra Wireless AC402 */
327    { USB_DEVICE(0x1199, 0x0028) }, /* Sierra Wireless MC5728 */
328    { USB_DEVICE(0x114F, 0x6000) }, /* Sierra Wireless Q26 Elite */
329
330    { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
331    { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
332    { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
333    { USB_DEVICE(0x1199, 0x6805) }, /* Sierra Wireless MC8765 */
334    { USB_DEVICE(0x1199, 0x6808) }, /* Sierra Wireless MC8755 */
335    { USB_DEVICE(0x1199, 0x6809) }, /* Sierra Wireless MC8765 */
336    { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
337    { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 */
338    { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
339    { USB_DEVICE(0x1199, 0x6816) }, /* Sierra Wireless MC8775 */
340    { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
341    { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
342    { USB_DEVICE(0x1199, 0x6822) }, /* Sierra Wireless AirCard 875E */
343    { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780 */
344    { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781 */
345    { USB_DEVICE(0x1199, 0x6834) }, /* Sierra Wireless MC8780 */
346    { USB_DEVICE(0x1199, 0x6835) }, /* Sierra Wireless MC8781 */
347    { USB_DEVICE(0x1199, 0x6838) }, /* Sierra Wireless MC8780 */
348    { USB_DEVICE(0x1199, 0x6839) }, /* Sierra Wireless MC8781 */
349    { USB_DEVICE(0x1199, 0x683A) }, /* Sierra Wireless MC8785 */
350    { USB_DEVICE(0x1199, 0x683B) }, /* Sierra Wireless MC8785 Composite */
351    /* Sierra Wireless MC8790, MC8791, MC8792 Composite */
352    { USB_DEVICE(0x1199, 0x683C) },
353    { USB_DEVICE(0x1199, 0x683D) }, /* Sierra Wireless MC8791 Composite */
354    /* Sierra Wireless MC8790, MC8791, MC8792 */
355    { USB_DEVICE(0x1199, 0x683E) },
356    { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
357    { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
358    { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
359    { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
360    { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
361    { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
362    { USB_DEVICE(0x1199, 0x6859) }, /* Sierra Wireless AirCard 885 E */
363    { USB_DEVICE(0x1199, 0x685A) }, /* Sierra Wireless AirCard 885 E */
364    /* Sierra Wireless C885 */
365    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6880, 0xFF, 0xFF, 0xFF)},
366    /* Sierra Wireless C888, Air Card 501, USB 303, USB 304 */
367    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6890, 0xFF, 0xFF, 0xFF)},
368    /* Sierra Wireless C22/C33 */
369    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6891, 0xFF, 0xFF, 0xFF)},
370    /* Sierra Wireless HSPA Non-Composite Device */
371    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x6892, 0xFF, 0xFF, 0xFF)},
372    { USB_DEVICE(0x1199, 0x6893) }, /* Sierra Wireless Device */
373    /* Sierra Wireless Direct IP modems */
374    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68A3, 0xFF, 0xFF, 0xFF),
375      .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
376    },
377    /* AT&T Direct IP modems */
378    { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68A3, 0xFF, 0xFF, 0xFF),
379      .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
380    },
381    /* Sierra Wireless Direct IP LTE modems */
382    { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x68AA, 0xFF, 0xFF, 0xFF),
383      .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
384    },
385    /* AT&T Direct IP LTE modems */
386    { USB_DEVICE_AND_INTERFACE_INFO(0x0F3D, 0x68AA, 0xFF, 0xFF, 0xFF),
387      .driver_info = (kernel_ulong_t)&direct_ip_interface_blacklist
388    },
389    /* Wireless 5720 VZW Mobile Broadband (EVDO Rev-A) Minicard GPS Port */
390    { USB_DEVICE(0x413C, 0x8133) },
391
392    { }
393};
394MODULE_DEVICE_TABLE(usb, id_table);
395
396/* per port private data */
397struct sierra_port_private {
398    spinlock_t lock; /* lock the structure */
399    int outstanding_urbs; /* number of out urbs in flight */
400
401    struct usb_anchor active;
402    struct usb_anchor delayed;
403
404    int num_out_urbs;
405    int num_in_urbs;
406    /* Input endpoints and buffers for this port */
407    struct urb *in_urbs[N_IN_URB_HM];
408
409    /* Settings for the port */
410    int rts_state; /* Handshaking pins (outputs) */
411    int dtr_state;
412    int cts_state; /* Handshaking pins (inputs) */
413    int dsr_state;
414    int dcd_state;
415    int ri_state;
416    unsigned int opened:1;
417};
418
419static int sierra_send_setup(struct usb_serial_port *port)
420{
421    struct usb_serial *serial = port->serial;
422    struct sierra_port_private *portdata = usb_get_serial_port_data(port);
423    __u16 interface = 0;
424    int val = 0;
425    int do_send = 0;
426    int retval;
427
428    dev_dbg(&port->dev, "%s\n", __func__);
429
430    if (portdata->dtr_state)
431        val |= 0x01;
432    if (portdata->rts_state)
433        val |= 0x02;
434
435    /* If composite device then properly report interface */
436    if (serial->num_ports == 1) {
437        interface = sierra_calc_interface(serial);
438        /* Control message is sent only to interfaces with
439         * interrupt_in endpoints
440         */
441        if (port->interrupt_in_urb) {
442            /* send control message */
443            do_send = 1;
444        }
445    }
446
447    /* Otherwise the need to do non-composite mapping */
448    else {
449        if (port->bulk_out_endpointAddress == 2)
450            interface = 0;
451        else if (port->bulk_out_endpointAddress == 4)
452            interface = 1;
453        else if (port->bulk_out_endpointAddress == 5)
454            interface = 2;
455
456        do_send = 1;
457    }
458    if (!do_send)
459        return 0;
460
461    usb_autopm_get_interface(serial->interface);
462    retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
463        0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT);
464    usb_autopm_put_interface(serial->interface);
465
466    return retval;
467}
468
469static void sierra_set_termios(struct tty_struct *tty,
470        struct usb_serial_port *port, struct ktermios *old_termios)
471{
472    dev_dbg(&port->dev, "%s\n", __func__);
473    tty_termios_copy_hw(tty->termios, old_termios);
474    sierra_send_setup(port);
475}
476
477static int sierra_tiocmget(struct tty_struct *tty)
478{
479    struct usb_serial_port *port = tty->driver_data;
480    unsigned int value;
481    struct sierra_port_private *portdata;
482
483    dev_dbg(&port->dev, "%s\n", __func__);
484    portdata = usb_get_serial_port_data(port);
485
486    value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
487        ((portdata->dtr_state) ? TIOCM_DTR : 0) |
488        ((portdata->cts_state) ? TIOCM_CTS : 0) |
489        ((portdata->dsr_state) ? TIOCM_DSR : 0) |
490        ((portdata->dcd_state) ? TIOCM_CAR : 0) |
491        ((portdata->ri_state) ? TIOCM_RNG : 0);
492
493    return value;
494}
495
496static int sierra_tiocmset(struct tty_struct *tty,
497            unsigned int set, unsigned int clear)
498{
499    struct usb_serial_port *port = tty->driver_data;
500    struct sierra_port_private *portdata;
501
502    portdata = usb_get_serial_port_data(port);
503
504    if (set & TIOCM_RTS)
505        portdata->rts_state = 1;
506    if (set & TIOCM_DTR)
507        portdata->dtr_state = 1;
508
509    if (clear & TIOCM_RTS)
510        portdata->rts_state = 0;
511    if (clear & TIOCM_DTR)
512        portdata->dtr_state = 0;
513    return sierra_send_setup(port);
514}
515
516static void sierra_release_urb(struct urb *urb)
517{
518    struct usb_serial_port *port;
519    if (urb) {
520        port = urb->context;
521        dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
522        usb_free_urb(urb);
523    }
524}
525
526/* Sysfs Attributes */
527
528static ssize_t show_suspend_status(struct device *dev,
529    struct device_attribute *attr, char *buf)
530{
531    struct usb_serial_port *port;
532    struct sierra_port_private *portdata;
533    struct sierra_intf_private *intfdata;
534    unsigned long flags;
535    unsigned int flag_suspended = 0;
536
537    port = to_usb_serial_port(dev);
538    portdata = usb_get_serial_port_data(port);
539    intfdata = port->serial->private;
540
541    spin_lock_irqsave(&intfdata->susp_lock, flags);
542    flag_suspended = intfdata->suspended;
543    spin_unlock_irqrestore(&intfdata->susp_lock, flags);
544
545    return snprintf(buf, PORTION_LEN, "%i\n", flag_suspended);
546}
547
548static ssize_t show_stats(struct device *dev,
549    struct device_attribute *attr, char *buf)
550{
551    struct usb_serial_port *port;
552    struct sierra_intf_private *intfdata;
553
554    port = to_usb_serial_port(dev);
555    intfdata = port->serial->private;
556
557    return snprintf(buf, PORTION_LEN,
558        "rx: %i B\tindat: %i\tindat err: %i\n"
559        "tx: %i B\toutdat: %i\toutdat err: %i\n"
560        "writes: %i\t\twrite err: %i\n"
561        "delayed writes: %i\tdelayed write err: %i\n",
562        atomic_read(&intfdata->stats.rx_bytes), atomic_read(&intfdata->stats.indat_cb_cnt), atomic_read(&intfdata->stats.indat_cb_fail),
563        atomic_read(&intfdata->stats.tx_bytes), atomic_read(&intfdata->stats.outdat_cb_cnt), atomic_read(&intfdata->stats.outdat_cb_fail),
564        atomic_read(&intfdata->stats.write_cnt), atomic_read(&intfdata->stats.write_err),
565        atomic_read(&intfdata->stats.delayed_writes), atomic_read(&intfdata->stats.delayed_write_err)
566    );
567}
568
569/* Read only suspend status */
570static DEVICE_ATTR(suspend_status, S_IWUSR | S_IRUGO, show_suspend_status,
571                            NULL);
572
573/* Read only statistics */
574static DEVICE_ATTR(stats, S_IWUSR | S_IRUGO, show_stats, NULL);
575
576static int sierra_create_sysfs_attrs(struct usb_serial_port *port)
577{
578    int result = 0;
579
580    result = device_create_file(&port->dev, &dev_attr_stats);
581    if (unlikely (result < 0))
582        return result;
583    return device_create_file(&port->dev, &dev_attr_suspend_status);
584}
585
586static int sierra_remove_sysfs_attrs(struct usb_serial_port *port)
587{
588    device_remove_file(&port->dev, &dev_attr_stats);
589    device_remove_file(&port->dev, &dev_attr_suspend_status);
590    return 0;
591}
592
593static void sierra_outdat_callback(struct urb *urb)
594{
595    struct usb_serial_port *port = urb->context;
596    struct sierra_port_private *portdata = usb_get_serial_port_data(port);
597    struct sierra_intf_private *intfdata;
598    int status = urb->status;
599
600    dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
601    intfdata = port->serial->private;
602
603    usb_autopm_put_interface_async(port->serial->interface);
604
605    atomic_inc(&intfdata->stats.outdat_cb_cnt);
606
607    if (status) {
608        dev_dbg(&port->dev, "%s - nonzero write bulk status "
609            "received: %d\n", __func__, status);
610        atomic_inc(&intfdata->stats.outdat_cb_fail);
611    }
612
613    spin_lock(&portdata->lock);
614    --portdata->outstanding_urbs;
615    spin_unlock(&portdata->lock);
616
617    spin_lock(&intfdata->susp_lock);
618    --intfdata->in_flight;
619    spin_unlock(&intfdata->susp_lock);
620
621    usb_serial_port_softint(port);
622}
623
624/* Write */
625static int sierra_write(struct tty_struct *tty,
626            struct usb_serial_port *port,
627            const unsigned char *buf, int count)
628{
629    struct sierra_port_private *portdata = usb_get_serial_port_data(port);
630    struct sierra_intf_private *intfdata;
631    struct usb_serial *serial = port->serial;
632    unsigned long flags;
633    unsigned char *buffer;
634    struct urb *urb;
635    size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
636    int retval = 0;
637
638    /* verify that we actually have some data to write */
639    if (count == 0)
640        return 0;
641
642    dev_dbg(&port->dev, "%s: write (%zu bytes)\n", __func__, writesize);
643
644    intfdata = serial->private;
645
646    spin_lock_irqsave(&portdata->lock, flags);
647    if (portdata->outstanding_urbs > portdata->num_out_urbs) {
648        spin_unlock_irqrestore(&portdata->lock, flags);
649        dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
650        return 0;
651    }
652    portdata->outstanding_urbs++;
653    spin_unlock_irqrestore(&portdata->lock, flags);
654
655    retval = usb_autopm_get_interface_async(serial->interface);
656    if (unlikely(retval < 0)) {
657        spin_lock_irqsave(&portdata->lock, flags);
658        portdata->outstanding_urbs--;
659        spin_unlock_irqrestore(&portdata->lock, flags);
660        return retval;
661    }
662
663    buffer = kmalloc(writesize, GFP_ATOMIC);
664    if (!buffer) {
665        dev_err(&port->dev, "out of memory\n");
666        spin_lock_irqsave(&portdata->lock, flags);
667        --portdata->outstanding_urbs;
668        spin_unlock_irqrestore(&portdata->lock, flags);
669        usb_autopm_put_interface_async(serial->interface);
670        return -ENOMEM;
671    }
672
673    urb = usb_alloc_urb(0, GFP_ATOMIC);
674    if (!urb) {
675        dev_err(&port->dev, "no more free urbs\n");
676        kfree(buffer);
677        spin_lock_irqsave(&portdata->lock, flags);
678        --portdata->outstanding_urbs;
679        spin_unlock_irqrestore(&portdata->lock, flags);
680        usb_autopm_put_interface_async(serial->interface);
681        return -ENOMEM;
682    }
683
684    memcpy(buffer, buf, writesize);
685
686    usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
687
688    usb_fill_bulk_urb(urb, serial->dev,
689              usb_sndbulkpipe(serial->dev,
690                      port->bulk_out_endpointAddress),
691              buffer, writesize, sierra_outdat_callback, port);
692
693    /* Handle the need to send a zero length packet and release the
694     * transfer buffer
695     */
696    urb->transfer_flags |= (URB_ZERO_PACKET | URB_FREE_BUFFER);
697
698    spin_lock_irqsave(&intfdata->susp_lock, flags);
699
700    if (intfdata->suspended) {
701        usb_anchor_urb(urb, &portdata->delayed);
702        spin_unlock_irqrestore(&intfdata->susp_lock, flags);
703        /* release our reference to this urb, the USB core will
704         * eventually free it entirely */
705        usb_free_urb(urb);
706        return writesize;
707    }
708    usb_anchor_urb(urb, &portdata->active);
709
710    /* send it down the pipe */
711    retval = usb_submit_urb(urb, GFP_ATOMIC);
712    if (retval) {
713        usb_unanchor_urb(urb);
714        spin_unlock_irqrestore(&intfdata->susp_lock, flags);
715
716        dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
717            "with status = %d\n", __func__, retval);
718        usb_free_urb(urb);
719        spin_lock_irqsave(&portdata->lock, flags);
720        --portdata->outstanding_urbs;
721        spin_unlock_irqrestore(&portdata->lock, flags);
722        usb_autopm_put_interface_async(serial->interface);
723        atomic_inc(&intfdata->stats.write_err);
724        return retval;
725    } else {
726        intfdata->in_flight++;
727        spin_unlock_irqrestore(&intfdata->susp_lock, flags);
728        atomic_inc(&intfdata->stats.write_cnt);
729        atomic_add(writesize, &intfdata->stats.tx_bytes);
730    }
731    /* release our reference to this urb, the USB core will eventually
732     * free it entirely */
733    usb_free_urb(urb);
734
735    return writesize;
736}
737
738static void sierra_indat_callback(struct urb *urb)
739{
740    int err;
741    int endpoint;
742    struct usb_serial_port *port = urb->context;
743    struct tty_struct *tty;
744    struct sierra_intf_private *intfdata;
745    unsigned char *data = urb->transfer_buffer;
746    int status = urb->status;
747
748    endpoint = usb_pipeendpoint(urb->pipe);
749
750    dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
751
752    intfdata = port->serial->private;
753
754    atomic_inc(&intfdata->stats.indat_cb_cnt); /* indat calls */
755
756    if (status) {
757        dev_dbg(&port->dev, "%s: nonzero status: %d on"
758            " endpoint %02x\n", __func__, status, endpoint);
759        atomic_inc(&intfdata->stats.indat_cb_fail); /* indat fails */
760    } else {
761        if (urb->actual_length) {
762            tty = tty_port_tty_get(&port->port);
763            if (tty) {
764                tty_insert_flip_string(tty, data,
765                    urb->actual_length);
766                tty_flip_buffer_push(tty);
767
768                tty_kref_put(tty);
769                /* tty invalid after this point */
770                /* rx'd bytes */
771                atomic_add(urb->actual_length,
772                &intfdata->stats.rx_bytes);
773                usb_serial_debug_data(debug, &port->dev,
774                    __func__, urb->actual_length, data);
775            }
776        } else {
777            dev_dbg(&port->dev, "%s: empty read urb"
778                " received\n", __func__);
779        }
780    }
781
782    /* Resubmit urb so we continue receiving */
783    if (status != -ESHUTDOWN && status != -ENOENT && status != -ENODEV) {
784        usb_mark_last_busy(port->serial->dev);
785        err = usb_submit_urb(urb, GFP_ATOMIC);
786        if (err && err != -ENODEV)
787            dev_err(&port->dev, "resubmit read urb failed."
788                "(%d)\n", err);
789    }
790
791    return;
792}
793
794static void sierra_instat_callback(struct urb *urb)
795{
796    int err;
797    int status = urb->status;
798    struct usb_serial_port *port = urb->context;
799    struct sierra_port_private *portdata = usb_get_serial_port_data(port);
800    struct usb_serial *serial = port->serial;
801
802    dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
803
804    if (status == 0) {
805        struct usb_ctrlrequest *req_pkt =
806                (struct usb_ctrlrequest *)urb->transfer_buffer;
807
808        const u16 *sigp = (u16 *)(req_pkt + 1);
809        /* usb_ctrlrequest we parsed is followed by two bytes of data
810         * make sure we received that many bytes
811         */
812        if (urb->actual_length >= sizeof(*req_pkt) + sizeof(*sigp) &&
813            req_pkt->bRequestType == USB_REQUEST_TYPE_CLASS &&
814            req_pkt->bRequest == USB_REQUEST_IFACE) {
815            int old_dcd_state;
816            const u16 signals = get_unaligned_le16(sigp);
817            struct tty_struct *tty;
818
819            dev_dbg(&port->dev, "%s: signal 0x%x\n", __func__,
820                signals);
821
822            old_dcd_state = portdata->dcd_state;
823            /* Note: CTS from modem is in reverse logic! */
824            portdata->cts_state = ((signals & 0x100) ? 0 : 1);
825            portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
826            portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
827            portdata->ri_state = ((signals & 0x08) ? 1 : 0);
828
829            tty = tty_port_tty_get(&port->port);
830            if (tty && !C_CLOCAL(tty) &&
831                    old_dcd_state && !portdata->dcd_state)
832                tty_hangup(tty);
833            tty_kref_put(tty);
834        } else {
835            /* dump the data we don't understand to log */
836            usb_serial_debug_data(1, &port->dev, __func__,
837                urb->actual_length, urb->transfer_buffer);
838        }
839    } else
840        dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
841
842    /* Resubmit urb so we continue receiving IRQ data */
843    if (status != -ESHUTDOWN && status != -ENOENT && status != -ENODEV) {
844        usb_mark_last_busy(serial->dev);
845        urb->dev = serial->dev;
846        err = usb_submit_urb(urb, GFP_ATOMIC);
847        if (err && err != -ENODEV)
848            dev_err(&port->dev, "%s: resubmit intr urb "
849                "failed. (%d)\n", __func__, err);
850    }
851}
852
853static int sierra_write_room(struct tty_struct *tty)
854{
855    struct usb_serial_port *port = tty->driver_data;
856    struct sierra_port_private *portdata = usb_get_serial_port_data(port);
857    unsigned long flags;
858    int retval;
859
860    dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
861
862    /* try to give a good number back based on if we have any free urbs at
863     * this point in time */
864    retval = MAX_TRANSFER;
865
866    spin_lock_irqsave(&portdata->lock, flags);
867    if (portdata->outstanding_urbs >= portdata->num_out_urbs) {
868        retval = 0;
869    }
870    spin_unlock_irqrestore(&portdata->lock, flags);
871
872    return retval;
873}
874
875static void sierra_stop_rx_urbs(struct usb_serial_port *port)
876{
877    int i;
878    struct sierra_port_private *portdata = usb_get_serial_port_data(port);
879
880    for (i = 0; i < portdata->num_in_urbs; i++)
881        usb_kill_urb(portdata->in_urbs[i]);
882
883    usb_kill_urb(port->interrupt_in_urb);
884}
885
886static int sierra_submit_rx_urbs(struct usb_serial_port *port, gfp_t mem_flags)
887{
888    int ok_cnt;
889    int err = -EINVAL;
890    int i;
891    struct urb *urb;
892    struct sierra_port_private *portdata = usb_get_serial_port_data(port);
893
894    ok_cnt = 0;
895    for (i = 0; i < portdata->num_in_urbs; i++) {
896        urb = portdata->in_urbs[i];
897        if (!urb)
898            continue;
899        urb->transfer_flags |= URB_FREE_BUFFER;
900        err = usb_submit_urb(urb, mem_flags);
901        if (err) {
902            dev_err(&port->dev, "%s: submit urb failed: %d\n",
903                __func__, err);
904        } else {
905            ok_cnt++;
906        }
907    }
908
909    if (ok_cnt && port->interrupt_in_urb) {
910        err = usb_submit_urb(port->interrupt_in_urb, mem_flags);
911        if (err) {
912            dev_err(&port->dev, "%s: submit intr urb failed: %d\n",
913                __func__, err);
914        }
915    }
916
917    if (ok_cnt > 0) /* at least one rx urb submitted */
918        return 0;
919    else
920        return err;
921}
922
923static struct urb *sierra_setup_urb(struct usb_serial *serial, int endpoint,
924                    int dir, void *ctx, int len,
925                    gfp_t mem_flags,
926                    usb_complete_t callback)
927{
928    struct urb *urb;
929    u8 *buf;
930
931    if (endpoint == -1)
932        return NULL;
933
934    urb = usb_alloc_urb(0, mem_flags);
935    if (urb == NULL) {
936        dev_dbg(&serial->dev->dev, "%s: alloc for endpoint %d failed\n",
937            __func__, endpoint);
938        return NULL;
939    }
940
941    buf = kmalloc(len, mem_flags);
942    if (buf) {
943        /* Fill URB using supplied data */
944        usb_fill_bulk_urb(urb, serial->dev,
945            usb_sndbulkpipe(serial->dev, endpoint) | dir,
946            buf, len, callback, ctx);
947
948        /* debug */
949        dev_dbg(&serial->dev->dev, "%s %c u : %p d:%p\n", __func__,
950                dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
951    } else {
952        dev_dbg(&serial->dev->dev, "%s %c u:%p d:%p\n", __func__,
953                dir == USB_DIR_IN ? 'i' : 'o', urb, buf);
954
955        sierra_release_urb(urb);
956        urb = NULL;
957    }
958
959    return urb;
960}
961static void sierra_close(struct usb_serial_port *port)
962{
963    int i;
964    struct urb *urb;
965    struct usb_serial *serial = port->serial;
966    struct sierra_port_private *portdata;
967    struct sierra_intf_private *intfdata = port->serial->private;
968
969    dev_dbg(&port->dev, "%s\n", __func__);
970    portdata = usb_get_serial_port_data(port);
971
972    portdata->rts_state = 0;
973    portdata->dtr_state = 0;
974
975    usb_autopm_get_interface(serial->interface);
976
977    if (serial->dev) {
978        mutex_lock(&serial->disc_mutex);
979        if (!serial->disconnected)
980            sierra_send_setup(port);
981        mutex_unlock(&serial->disc_mutex);
982        spin_lock_irq(&intfdata->susp_lock);
983        portdata->opened = 0;
984        spin_unlock_irq(&intfdata->susp_lock);
985
986        /* Stop reading urbs */
987        sierra_stop_rx_urbs(port);
988        /* .. and release them */
989        for (i = 0; i < portdata->num_in_urbs; i++) {
990            sierra_release_urb(portdata->in_urbs[i]);
991            portdata->in_urbs[i] = NULL;
992        }
993        while((urb = usb_get_from_anchor(&portdata->delayed))) {
994            sierra_release_urb(urb);
995            usb_autopm_put_interface(serial->interface);
996        }
997        /* wait for active to finish */
998        usb_wait_anchor_empty_timeout(&portdata->active, 500);
999        usb_kill_anchored_urbs(&portdata->active);
1000
1001    }
1002}
1003
1004static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
1005{
1006    struct sierra_port_private *portdata;
1007    struct usb_serial *serial = port->serial;
1008    struct sierra_intf_private *intfdata = serial->private;
1009    int i;
1010    int err;
1011    int endpoint;
1012    struct urb *urb;
1013
1014    portdata = usb_get_serial_port_data(port);
1015
1016    dev_dbg(&port->dev, "%s\n", __func__);
1017
1018    /* Set some sane defaults */
1019    portdata->rts_state = 1;
1020    portdata->dtr_state = 1;
1021
1022
1023    endpoint = port->bulk_in_endpointAddress;
1024    for (i = 0; i < portdata->num_in_urbs; i++) {
1025        urb = sierra_setup_urb(serial, endpoint, USB_DIR_IN, port,
1026                    IN_BUFLEN, GFP_KERNEL,
1027                    sierra_indat_callback);
1028        portdata->in_urbs[i] = urb;
1029    }
1030    /* clear halt condition */
1031    usb_clear_halt(serial->dev,
1032            usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN);
1033
1034    /* reset outstanding out urbs counter */
1035    spin_lock_irq(&portdata->lock);
1036    portdata->outstanding_urbs = 0;
1037    spin_unlock_irq(&portdata->lock);
1038
1039    err = sierra_submit_rx_urbs(port, GFP_KERNEL);
1040    if (err) {
1041        /* do everything as in close() but do not call close() because
1042         * usbserial calls sierra_open() with mutex taken;
1043         * then if we call sierra_close() inside sierra_open() we
1044         * violate 'no nested mutexes' kernel condition
1045         */
1046        portdata->rts_state = 0;
1047        portdata->dtr_state = 0;
1048        usb_autopm_get_interface(serial->interface);
1049        /* Stop reading urbs */
1050        sierra_stop_rx_urbs(port);
1051        /* .. and release them */
1052        for (i = 0; i < portdata->num_in_urbs; i++) {
1053            sierra_release_urb(portdata->in_urbs[i]);
1054            portdata->in_urbs[i] = NULL;
1055        }
1056        while((urb = usb_get_from_anchor(&portdata->delayed))) {
1057            sierra_release_urb(urb);
1058            usb_autopm_put_interface(serial->interface);
1059        }
1060        /* wait for active to finish */
1061        usb_wait_anchor_empty_timeout(&portdata->active, 500);
1062        usb_kill_anchored_urbs(&portdata->active);
1063        /* restore balance for autopm */
1064        usb_autopm_put_interface(serial->interface);
1065        return err;
1066    }
1067    sierra_send_setup(port);
1068
1069    spin_lock_irq(&intfdata->susp_lock);
1070    portdata->opened = 1;
1071    spin_unlock_irq(&intfdata->susp_lock);
1072    usb_autopm_put_interface(serial->interface);
1073
1074    return 0;
1075}
1076
1077static void sierra_dtr_rts(struct usb_serial_port *port, int on)
1078{
1079    struct usb_serial *serial = port->serial;
1080    struct sierra_port_private *portdata;
1081
1082    portdata = usb_get_serial_port_data(port);
1083    portdata->rts_state = on;
1084    portdata->dtr_state = on;
1085
1086    if (serial->dev) {
1087        mutex_lock(&serial->disc_mutex);
1088        if (!serial->disconnected)
1089            sierra_send_setup(port);
1090        mutex_unlock(&serial->disc_mutex);
1091    }
1092}
1093
1094static int sierra_startup(struct usb_serial *serial)
1095{
1096    struct usb_serial_port *port = NULL;
1097    struct sierra_port_private *portdata = NULL;
1098    struct sierra_iface_info *himemoryp = NULL;
1099    int i;
1100    u8 ifnum;
1101    u16 fw_attr;
1102    int result;
1103
1104    dev_dbg(&serial->dev->dev, "%s\n", __func__);
1105
1106    /* Set Device mode to D0 */
1107    sierra_set_power_state(serial->dev, 0x0000);
1108
1109    /* Check NMEA and set */
1110    if (nmea)
1111        sierra_vsc_set_nmea(serial->dev, 1);
1112
1113    if (serial->num_ports) {
1114        /* Note: One big piece of memory is allocated for all ports
1115         * private data in one shot. This memory is split into equal
1116         * pieces for each port.
1117         */
1118        portdata = (struct sierra_port_private *)kzalloc
1119            (sizeof(*portdata) * serial->num_ports, GFP_KERNEL);
1120        if (!portdata) {
1121            dev_dbg(&serial->dev->dev, "%s: No memory!\n", __func__);
1122            return -ENOMEM;
1123        }
1124    }
1125
1126    /* Now setup per port private data */
1127    for (i = 0; i < serial->num_ports; i++, portdata++) {
1128        port = serial->port[i];
1129        /* Initialize selected members of private data because these
1130         * may be referred to right away */
1131        spin_lock_init(&portdata->lock);
1132        init_usb_anchor(&portdata->active);
1133        init_usb_anchor(&portdata->delayed);
1134
1135        portdata->cts_state = 1;
1136
1137        ifnum = i;
1138        /* Assume low memory requirements */
1139        portdata->num_out_urbs = N_OUT_URB;
1140        portdata->num_in_urbs = N_IN_URB;
1141
1142        /* Determine actual memory requirements */
1143        if (serial->num_ports == 1) {
1144            /* Get interface number for composite device */
1145            ifnum = sierra_calc_interface(serial);
1146            himemoryp =
1147                (struct sierra_iface_info *)&typeB_interface_list;
1148            if (is_himemory(ifnum, himemoryp)) {
1149                portdata->num_out_urbs = N_OUT_URB_HM;
1150                portdata->num_in_urbs = N_IN_URB_HM;
1151            }
1152        }
1153        else {
1154            himemoryp =
1155                (struct sierra_iface_info *)&typeA_interface_list;
1156            if (is_himemory(i, himemoryp)) {
1157                portdata->num_out_urbs = N_OUT_URB_HM;
1158                portdata->num_in_urbs = N_IN_URB_HM;
1159            }
1160        }
1161        dev_dbg(&serial->dev->dev,
1162            "Memory usage (urbs) interface #%d, in=%d, out=%d\n",
1163            ifnum,portdata->num_in_urbs, portdata->num_out_urbs );
1164        /* Set the port private data pointer */
1165        usb_set_serial_port_data(port, portdata);
1166    }
1167    serial->interface->needs_remote_wakeup = 1;
1168
1169    result = sierra_get_fw_attr(serial->dev, &fw_attr);
1170    if (result == sizeof(fw_attr) && (fw_attr & SWI_FW_ATTR_PM_MASK) ) {
1171        dev_info(&serial->dev->dev,
1172            "APM supported, enabling autosuspend.\n");
1173/*******************************************************************************
1174 * If you want the default /sys/bus/usb/devices/.../.../power/level to be forced
1175 * to auto, the following needs to be compiled in.
1176 */
1177#ifdef POWER_LEVEL_AUTO
1178        /* make power level default be 'auto' */
1179        usb_enable_autosuspend(serial->dev);
1180#endif
1181    } else {
1182        usb_disable_autosuspend(serial->dev);
1183    }
1184
1185    return 0;
1186}
1187
1188static void sierra_release(struct usb_serial *serial)
1189{
1190    int i;
1191    struct usb_serial_port *port;
1192    struct sierra_intf_private *intfdata = serial->private;
1193
1194    dev_dbg(&serial->dev->dev, "%s\n", __func__);
1195
1196    if (serial->num_ports > 0) {
1197        port = serial->port[0];
1198        if (port)
1199            /* Note: The entire piece of memory that was allocated
1200             * in the startup routine can be released by passing
1201             * a pointer to the beginning of the piece.
1202             * This address corresponds to the address of the chunk
1203             * that was given to port 0.
1204              */
1205            kfree(usb_get_serial_port_data(port));
1206    }
1207
1208    for (i = 0; i < serial->num_ports; ++i) {
1209        port = serial->port[i];
1210        if (!port)
1211            continue;
1212        usb_set_serial_port_data(port, NULL);
1213    }
1214    kfree(intfdata);
1215}
1216
1217#ifdef CONFIG_PM
1218static void stop_read_write_urbs(struct usb_serial *serial)
1219{
1220    int i;
1221    struct usb_serial_port *port;
1222    struct sierra_port_private *portdata;
1223
1224    /* Stop reading/writing urbs */
1225    for (i = 0; i < serial->num_ports; ++i) {
1226        port = serial->port[i];
1227        portdata = usb_get_serial_port_data(port);
1228        sierra_stop_rx_urbs(port);
1229        usb_kill_anchored_urbs(&portdata->active);
1230    }
1231}
1232
1233static int sierra_suspend(struct usb_serial *serial, pm_message_t message)
1234{
1235    struct sierra_intf_private *intfdata;
1236
1237    dev_dbg(&serial->dev->dev, "%s\n", __func__);
1238
1239    intfdata = serial->private;
1240    spin_lock_irq(&intfdata->susp_lock);
1241
1242    if (message.event & PM_EVENT_AUTO) {
1243        if (intfdata->in_flight) {
1244            spin_unlock_irq(&intfdata->susp_lock);
1245            return -EBUSY;
1246        }
1247    }
1248    intfdata->suspended = 1;
1249    spin_unlock_irq(&intfdata->susp_lock);
1250
1251    stop_read_write_urbs(serial);
1252
1253    return 0;
1254}
1255
1256static int sierra_resume(struct usb_serial *serial)
1257{
1258    struct usb_serial_port *port;
1259    struct sierra_intf_private *intfdata = serial->private;
1260    struct sierra_port_private *portdata;
1261    struct urb *urb;
1262    int ec = 0;
1263    int i, err;
1264    int len;
1265    int failed_submits;
1266
1267    dev_dbg(&serial->dev->dev, "%s\n", __func__);
1268    
1269    spin_lock_irq(&intfdata->susp_lock);
1270    for (i = 0; i < serial->num_ports; i++) {
1271        port = serial->port[i];
1272        portdata = usb_get_serial_port_data(port);
1273        failed_submits = 0;
1274        while ((urb = usb_get_from_anchor(&portdata->delayed))) {
1275            usb_anchor_urb(urb, &portdata->active);
1276            intfdata->in_flight++;
1277            len = urb->transfer_buffer_length;
1278            err = usb_submit_urb(urb, GFP_ATOMIC);
1279            if (err < 0) {
1280                intfdata->in_flight--;
1281                usb_unanchor_urb(urb);
1282                failed_submits++;
1283                atomic_inc(&intfdata->stats.delayed_write_err);
1284                /* fix pm_usage_cnt */
1285                usb_autopm_put_interface_async(
1286                    port->serial->interface);
1287            } else {
1288                atomic_inc(&intfdata->stats.delayed_writes);
1289                atomic_add(len, &intfdata->stats.tx_bytes);
1290            }
1291            /* release urb - usb_get_from_anchor increased kref */
1292            usb_free_urb(urb);
1293        }
1294
1295        if (portdata->opened) {
1296            err = sierra_submit_rx_urbs(port, GFP_ATOMIC);
1297            if (err)
1298                ec++;
1299        }
1300        if (failed_submits) {
1301            /* fix outstanding_urbs counter */
1302            spin_lock(&portdata->lock); /* assuming irq disabled */
1303            portdata->outstanding_urbs -= failed_submits;
1304            spin_unlock(&portdata->lock);
1305            /* unblock a writer */
1306            usb_serial_port_softint(port);
1307        }
1308    }
1309    intfdata->suspended = 0;
1310    spin_unlock_irq(&intfdata->susp_lock);
1311
1312    return ec ? -EIO : 0;
1313}
1314#else
1315#define sierra_suspend NULL
1316#define sierra_resume NULL
1317#endif
1318
1319static int sierra_reset_resume(struct usb_interface *intf)
1320{
1321    struct usb_serial *serial = usb_get_intfdata(intf);
1322    dev_err(&serial->dev->dev, "%s\n", __func__);
1323    return usb_serial_resume(intf);
1324}
1325
1326static struct usb_driver sierra_driver = {
1327    .name = "sierra",
1328    .probe = usb_serial_probe,
1329    .disconnect = usb_serial_disconnect,
1330    .suspend = usb_serial_suspend,
1331    .resume = usb_serial_resume,
1332    .reset_resume = sierra_reset_resume,
1333    .id_table = id_table,
1334
1335    .no_dynamic_id = 1,
1336    .supports_autosuspend = 1,
1337};
1338
1339
1340static struct usb_serial_driver sierra_device = {
1341    .driver = {
1342        .owner = THIS_MODULE,
1343        .name = "sierra",
1344    },
1345    .description = "Sierra USB modem",
1346    .id_table = id_table,
1347    .usb_driver = &sierra_driver,
1348    .calc_num_ports = sierra_calc_num_ports,
1349    .probe = sierra_probe,
1350    .open = sierra_open,
1351    .close = sierra_close,
1352    .dtr_rts = sierra_dtr_rts,
1353    .write = sierra_write,
1354    .write_room = sierra_write_room,
1355    .set_termios = sierra_set_termios,
1356    .tiocmget = sierra_tiocmget,
1357    .tiocmset = sierra_tiocmset,
1358    .attach = sierra_startup,
1359    .release = sierra_release,
1360    .port_probe = sierra_create_sysfs_attrs,
1361    .port_remove = sierra_remove_sysfs_attrs,
1362    .suspend = sierra_suspend,
1363    .resume = sierra_resume,
1364    .read_int_callback = sierra_instat_callback,
1365
1366};
1367
1368/* Functions used by new usb-serial code. */
1369static int __init sierra_init(void)
1370{
1371    int retval;
1372    retval = usb_serial_register(&sierra_device);
1373    if (retval)
1374        goto failed_device_register;
1375
1376    retval = usb_register(&sierra_driver);
1377    if (retval)
1378        goto failed_driver_register;
1379
1380    printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1381           DRIVER_DESC "\n");
1382
1383    return 0;
1384
1385failed_driver_register:
1386    usb_serial_deregister(&sierra_device);
1387failed_device_register:
1388    return retval;
1389}
1390
1391static void __exit sierra_exit(void)
1392{
1393    usb_deregister(&sierra_driver);
1394    usb_serial_deregister(&sierra_device);
1395}
1396
1397module_init(sierra_init);
1398module_exit(sierra_exit);
1399
1400MODULE_AUTHOR(DRIVER_AUTHOR);
1401MODULE_DESCRIPTION(DRIVER_DESC);
1402MODULE_VERSION(DRIVER_VERSION);
1403MODULE_LICENSE("GPL");
1404
1405module_param(nmea, bool, S_IRUGO | S_IWUSR);
1406MODULE_PARM_DESC(nmea, "NMEA streaming");
1407
1408module_param(debug, bool, S_IRUGO | S_IWUSR);
1409MODULE_PARM_DESC(debug, "Debug messages");
1410

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