2 * USB driver for Gigaset 307x base via direct USB connection.
4 * Copyright (c) 2001 by Hansjoerg Lipp <hjlipp@web.de>,
5 * Tilman Schmidt <tilman@imap.cc>,
8 * =====================================================================
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 * =====================================================================
18 #include <linux/errno.h>
19 #include <linux/init.h>
20 #include <linux/slab.h>
21 #include <linux/timer.h>
22 #include <linux/usb.h>
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
26 /* Version Information */
27 #define DRIVER_AUTHOR "Tilman Schmidt <tilman@imap.cc>, Hansjoerg Lipp <hjlipp@web.de>, Stefan Eilers"
28 #define DRIVER_DESC "USB Driver for Gigaset 307x"
31 /* Module parameters */
33 static int startmode
= SM_ISDN
;
34 static int cidmode
= 1;
36 module_param(startmode
, int, S_IRUGO
);
37 module_param(cidmode
, int, S_IRUGO
);
38 MODULE_PARM_DESC(startmode
, "start in isdn4linux mode");
39 MODULE_PARM_DESC(cidmode
, "Call-ID mode");
41 #define GIGASET_MINORS 1
42 #define GIGASET_MINOR 16
43 #define GIGASET_MODULENAME "bas_gigaset"
44 #define GIGASET_DEVFSNAME "gig/bas/"
45 #define GIGASET_DEVNAME "ttyGB"
47 /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
48 #define IF_WRITEBUF 264
50 /* Values for the Gigaset 307x */
51 #define USB_GIGA_VENDOR_ID 0x0681
52 #define USB_3070_PRODUCT_ID 0x0001
53 #define USB_3075_PRODUCT_ID 0x0002
54 #define USB_SX303_PRODUCT_ID 0x0021
55 #define USB_SX353_PRODUCT_ID 0x0022
57 /* table of devices that work with this driver */
58 static struct usb_device_id gigaset_table
[] = {
59 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_3070_PRODUCT_ID
) },
60 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_3075_PRODUCT_ID
) },
61 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_SX303_PRODUCT_ID
) },
62 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_SX353_PRODUCT_ID
) },
63 { } /* Terminating entry */
66 MODULE_DEVICE_TABLE(usb
, gigaset_table
);
68 /*======================= local function prototypes ==========================*/
70 /* function called if a new device belonging to this driver is connected */
71 static int gigaset_probe(struct usb_interface
*interface
,
72 const struct usb_device_id
*id
);
74 /* Function will be called if the device is unplugged */
75 static void gigaset_disconnect(struct usb_interface
*interface
);
77 static int atread_submit(struct cardstate
*, int);
78 static void stopurbs(struct bas_bc_state
*);
79 static int req_submit(struct bc_state
*, int, int, int);
80 static int atwrite_submit(struct cardstate
*, unsigned char *, int);
81 static int start_cbsend(struct cardstate
*);
83 /*============================================================================*/
85 struct bas_cardstate
{
86 struct usb_device
*udev
; /* USB device pointer */
87 struct usb_interface
*interface
; /* interface for this device */
88 unsigned char minor
; /* starting minor number */
90 struct urb
*urb_ctrl
; /* control pipe default URB */
91 struct usb_ctrlrequest dr_ctrl
;
92 struct timer_list timer_ctrl
; /* control request timeout */
95 struct timer_list timer_atrdy
; /* AT command ready timeout */
96 struct urb
*urb_cmd_out
; /* for sending AT commands */
97 struct usb_ctrlrequest dr_cmd_out
;
100 struct urb
*urb_cmd_in
; /* for receiving AT replies */
101 struct usb_ctrlrequest dr_cmd_in
;
102 struct timer_list timer_cmd_in
; /* receive request timeout */
103 unsigned char *rcvbuf
; /* AT reply receive buffer */
105 struct urb
*urb_int_in
; /* URB for interrupt pipe */
106 unsigned char int_in_buf
[3];
108 spinlock_t lock
; /* locks all following */
109 atomic_t basstate
; /* bitmap (BS_*) */
110 int pending
; /* uncompleted base request */
111 int rcvbuf_size
; /* size of AT receive buffer */
112 /* 0: no receive in progress */
113 int retry_cmd_in
; /* receive req retry count */
116 /* status of direct USB connection to 307x base (bits in basstate) */
117 #define BS_ATOPEN 0x001 /* AT channel open */
118 #define BS_B1OPEN 0x002 /* B channel 1 open */
119 #define BS_B2OPEN 0x004 /* B channel 2 open */
120 #define BS_ATREADY 0x008 /* base ready for AT command */
121 #define BS_INIT 0x010 /* base has signalled INIT_OK */
122 #define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */
123 #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */
124 #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */
127 static struct gigaset_driver
*driver
= NULL
;
128 static struct cardstate
*cardstate
= NULL
;
130 /* usb specific object needed to register this driver with the usb subsystem */
131 static struct usb_driver gigaset_usb_driver
= {
132 .name
= GIGASET_MODULENAME
,
133 .probe
= gigaset_probe
,
134 .disconnect
= gigaset_disconnect
,
135 .id_table
= gigaset_table
,
138 /* get message text for usb_submit_urb return code
140 static char *get_usb_rcmsg(int rc
)
142 static char unkmsg
[28];
148 return "out of memory";
150 return "device not present";
152 return "endpoint not present";
154 return "URB type not supported";
156 return "invalid argument";
158 return "start frame too early or too much scheduled";
160 return "too many isochronous frames requested";
162 return "endpoint stalled";
164 return "invalid packet size";
166 return "would overcommit USB bandwidth";
168 return "device shut down";
170 return "reject flag set";
172 return "device suspended";
174 snprintf(unkmsg
, sizeof(unkmsg
), "unknown error %d", rc
);
179 /* get message text for USB status code
181 static char *get_usb_statmsg(int status
)
183 static char unkmsg
[28];
189 return "unlinked (sync)";
193 return "bit stuffing error, timeout, or unknown USB error";
195 return "CRC mismatch, timeout, or unknown USB error";
199 return "endpoint stalled";
201 return "IN buffer overrun";
203 return "OUT buffer underrun";
205 return "too much data";
207 return "short packet detected";
209 return "device removed";
211 return "partial isochronous transfer";
213 return "invalid argument";
215 return "unlinked (async)";
217 return "device shut down";
219 snprintf(unkmsg
, sizeof(unkmsg
), "unknown status %d", status
);
225 * retrieve string representation of USB pipe type
227 static inline char *usb_pipetype_str(int pipe
)
229 if (usb_pipeisoc(pipe
))
231 if (usb_pipeint(pipe
))
233 if (usb_pipecontrol(pipe
))
235 if (usb_pipebulk(pipe
))
241 * write content of URB to syslog for debugging
243 static inline void dump_urb(enum debuglevel level
, const char *tag
,
246 #ifdef CONFIG_GIGASET_DEBUG
248 gig_dbg(level
, "%s urb(0x%08lx)->{", tag
, (unsigned long) urb
);
251 " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
252 "status=%d, hcpriv=0x%08lx, transfer_flags=0x%x,",
253 (unsigned long) urb
->dev
,
254 usb_pipetype_str(urb
->pipe
),
255 usb_pipeendpoint(urb
->pipe
), usb_pipedevice(urb
->pipe
),
256 usb_pipein(urb
->pipe
) ? "in" : "out",
257 urb
->status
, (unsigned long) urb
->hcpriv
,
258 urb
->transfer_flags
);
260 " transfer_buffer=0x%08lx[%d], actual_length=%d, "
261 "bandwidth=%d, setup_packet=0x%08lx,",
262 (unsigned long) urb
->transfer_buffer
,
263 urb
->transfer_buffer_length
, urb
->actual_length
,
264 urb
->bandwidth
, (unsigned long) urb
->setup_packet
);
266 " start_frame=%d, number_of_packets=%d, interval=%d, "
268 urb
->start_frame
, urb
->number_of_packets
, urb
->interval
,
271 " context=0x%08lx, complete=0x%08lx, "
272 "iso_frame_desc[]={",
273 (unsigned long) urb
->context
,
274 (unsigned long) urb
->complete
);
275 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
276 struct usb_iso_packet_descriptor
*pifd
277 = &urb
->iso_frame_desc
[i
];
279 " {offset=%u, length=%u, actual_length=%u, "
281 pifd
->offset
, pifd
->length
, pifd
->actual_length
,
285 gig_dbg(level
, "}}");
289 /* read/set modem control bits etc. (m10x only) */
290 static int gigaset_set_modem_ctrl(struct cardstate
*cs
, unsigned old_state
,
296 static int gigaset_baud_rate(struct cardstate
*cs
, unsigned cflag
)
301 static int gigaset_set_line_ctrl(struct cardstate
*cs
, unsigned cflag
)
307 * hang up any existing connection because of an unrecoverable error
308 * This function may be called from any context and takes care of scheduling
309 * the necessary actions for execution outside of interrupt context.
310 * cs->lock must not be held.
312 * B channel control structure
314 static inline void error_hangup(struct bc_state
*bcs
)
316 struct cardstate
*cs
= bcs
->cs
;
318 gig_dbg(DEBUG_ANY
, "%s: scheduling HUP for channel %d",
319 __func__
, bcs
->channel
);
321 if (!gigaset_add_event(cs
, &bcs
->at_state
, EV_HUP
, NULL
, 0, NULL
))
322 dev_err(cs
->dev
, "event queue full\n");
324 gigaset_schedule_event(cs
);
328 * reset Gigaset device because of an unrecoverable error
329 * This function may be called from any context, and takes care of
330 * scheduling the necessary actions for execution outside of interrupt context.
331 * cs->lock must not be held.
333 * controller state structure
335 static inline void error_reset(struct cardstate
*cs
)
337 /* close AT command channel to recover (ignore errors) */
338 req_submit(cs
->bcs
, HD_CLOSE_ATCHANNEL
, 0, BAS_TIMEOUT
);
340 //FIXME try to recover without bothering the user
342 "unrecoverable error - please disconnect Gigaset base to reset\n");
346 * check for completion of pending control request
348 * ucs hardware specific controller state structure
350 static void check_pending(struct bas_cardstate
*ucs
)
354 spin_lock_irqsave(&ucs
->lock
, flags
);
355 switch (ucs
->pending
) {
358 case HD_OPEN_ATCHANNEL
:
359 if (atomic_read(&ucs
->basstate
) & BS_ATOPEN
)
362 case HD_OPEN_B1CHANNEL
:
363 if (atomic_read(&ucs
->basstate
) & BS_B1OPEN
)
366 case HD_OPEN_B2CHANNEL
:
367 if (atomic_read(&ucs
->basstate
) & BS_B2OPEN
)
370 case HD_CLOSE_ATCHANNEL
:
371 if (!(atomic_read(&ucs
->basstate
) & BS_ATOPEN
))
374 case HD_CLOSE_B1CHANNEL
:
375 if (!(atomic_read(&ucs
->basstate
) & BS_B1OPEN
))
378 case HD_CLOSE_B2CHANNEL
:
379 if (!(atomic_read(&ucs
->basstate
) & BS_B2OPEN
))
382 case HD_DEVICE_INIT_ACK
: /* no reply expected */
385 /* HD_READ_ATMESSAGE, HD_WRITE_ATMESSAGE, HD_RESET_INTERRUPTPIPE
386 * are handled separately and should never end up here
389 dev_warn(&ucs
->interface
->dev
,
390 "unknown pending request 0x%02x cleared\n",
396 del_timer(&ucs
->timer_ctrl
);
398 spin_unlock_irqrestore(&ucs
->lock
, flags
);
402 * timeout routine for command input request
404 * controller state structure
406 static void cmd_in_timeout(unsigned long data
)
408 struct cardstate
*cs
= (struct cardstate
*) data
;
409 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
412 if (!ucs
->rcvbuf_size
) {
413 gig_dbg(DEBUG_USBREQ
, "%s: no receive in progress", __func__
);
417 if (ucs
->retry_cmd_in
++ < BAS_RETRY
) {
418 dev_notice(cs
->dev
, "control read: timeout, retry %d\n",
420 rc
= atread_submit(cs
, BAS_TIMEOUT
);
421 if (rc
>= 0 || rc
== -ENODEV
)
422 /* resubmitted or disconnected */
423 /* - bypass regular exit block */
427 "control read: timeout, giving up after %d tries\n",
432 ucs
->rcvbuf_size
= 0;
436 /* set/clear bits in base connection state, return previous state
438 inline static int update_basstate(struct bas_cardstate
*ucs
,
444 spin_lock_irqsave(&ucs
->lock
, flags
);
445 state
= atomic_read(&ucs
->basstate
);
446 atomic_set(&ucs
->basstate
, (state
& ~clear
) | set
);
447 spin_unlock_irqrestore(&ucs
->lock
, flags
);
451 /* read_ctrl_callback
452 * USB completion handler for control pipe input
453 * called by the USB subsystem in interrupt context
455 * urb USB request block
456 * urb->context = inbuf structure for controller state
458 static void read_ctrl_callback(struct urb
*urb
, struct pt_regs
*regs
)
460 struct inbuf_t
*inbuf
= urb
->context
;
461 struct cardstate
*cs
= inbuf
->cs
;
462 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
467 update_basstate(ucs
, 0, BS_ATRDPEND
);
469 if (!ucs
->rcvbuf_size
) {
470 dev_warn(cs
->dev
, "%s: no receive in progress\n", __func__
);
474 del_timer(&ucs
->timer_cmd_in
);
476 switch (urb
->status
) {
477 case 0: /* normal completion */
478 numbytes
= urb
->actual_length
;
479 if (unlikely(numbytes
!= ucs
->rcvbuf_size
)) {
481 "control read: received %d chars, expected %d\n",
482 numbytes
, ucs
->rcvbuf_size
);
483 if (numbytes
> ucs
->rcvbuf_size
)
484 numbytes
= ucs
->rcvbuf_size
;
487 /* copy received bytes to inbuf */
488 have_data
= gigaset_fill_inbuf(inbuf
, ucs
->rcvbuf
, numbytes
);
490 if (unlikely(numbytes
< ucs
->rcvbuf_size
)) {
491 /* incomplete - resubmit for remaining bytes */
492 ucs
->rcvbuf_size
-= numbytes
;
493 ucs
->retry_cmd_in
= 0;
494 rc
= atread_submit(cs
, BAS_TIMEOUT
);
495 if (rc
>= 0 || rc
== -ENODEV
)
496 /* resubmitted or disconnected */
497 /* - bypass regular exit block */
503 case -ENOENT
: /* cancelled */
504 case -ECONNRESET
: /* cancelled (async) */
505 case -EINPROGRESS
: /* pending */
506 case -ENODEV
: /* device removed */
507 case -ESHUTDOWN
: /* device shut down */
508 /* no action necessary */
509 gig_dbg(DEBUG_USBREQ
, "%s: %s",
510 __func__
, get_usb_statmsg(urb
->status
));
513 default: /* severe trouble */
514 dev_warn(cs
->dev
, "control read: %s\n",
515 get_usb_statmsg(urb
->status
));
516 if (ucs
->retry_cmd_in
++ < BAS_RETRY
) {
517 dev_notice(cs
->dev
, "control read: retry %d\n",
519 rc
= atread_submit(cs
, BAS_TIMEOUT
);
520 if (rc
>= 0 || rc
== -ENODEV
)
521 /* resubmitted or disconnected */
522 /* - bypass regular exit block */
526 "control read: giving up after %d tries\n",
534 ucs
->rcvbuf_size
= 0;
536 gig_dbg(DEBUG_INTR
, "%s-->BH", __func__
);
537 gigaset_schedule_event(cs
);
542 * submit an HD_READ_ATMESSAGE command URB and optionally start a timeout
544 * cs controller state structure
545 * timeout timeout in 1/10 sec., 0: none
548 * -EBUSY if another request is pending
549 * any URB submission error code
551 static int atread_submit(struct cardstate
*cs
, int timeout
)
553 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
556 gig_dbg(DEBUG_USBREQ
, "-------> HD_READ_ATMESSAGE (%d)",
559 if (update_basstate(ucs
, BS_ATRDPEND
, 0) & BS_ATRDPEND
) {
561 "could not submit HD_READ_ATMESSAGE: URB busy\n");
565 ucs
->dr_cmd_in
.bRequestType
= IN_VENDOR_REQ
;
566 ucs
->dr_cmd_in
.bRequest
= HD_READ_ATMESSAGE
;
567 ucs
->dr_cmd_in
.wValue
= 0;
568 ucs
->dr_cmd_in
.wIndex
= 0;
569 ucs
->dr_cmd_in
.wLength
= cpu_to_le16(ucs
->rcvbuf_size
);
570 usb_fill_control_urb(ucs
->urb_cmd_in
, ucs
->udev
,
571 usb_rcvctrlpipe(ucs
->udev
, 0),
572 (unsigned char*) & ucs
->dr_cmd_in
,
573 ucs
->rcvbuf
, ucs
->rcvbuf_size
,
574 read_ctrl_callback
, cs
->inbuf
);
576 if ((ret
= usb_submit_urb(ucs
->urb_cmd_in
, SLAB_ATOMIC
)) != 0) {
577 update_basstate(ucs
, 0, BS_ATRDPEND
);
578 dev_err(cs
->dev
, "could not submit HD_READ_ATMESSAGE: %s\n",
584 gig_dbg(DEBUG_USBREQ
, "setting timeout of %d/10 secs", timeout
);
585 ucs
->timer_cmd_in
.expires
= jiffies
+ timeout
* HZ
/ 10;
586 ucs
->timer_cmd_in
.data
= (unsigned long) cs
;
587 ucs
->timer_cmd_in
.function
= cmd_in_timeout
;
588 add_timer(&ucs
->timer_cmd_in
);
594 * USB completion handler for interrupt pipe input
595 * called by the USB subsystem in interrupt context
597 * urb USB request block
598 * urb->context = controller state structure
600 static void read_int_callback(struct urb
*urb
, struct pt_regs
*regs
)
602 struct cardstate
*cs
= urb
->context
;
603 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
604 struct bc_state
*bcs
;
610 switch (urb
->status
) {
611 case 0: /* success */
613 case -ENOENT
: /* cancelled */
614 case -ECONNRESET
: /* cancelled (async) */
615 case -EINPROGRESS
: /* pending */
616 /* ignore silently */
617 gig_dbg(DEBUG_USBREQ
, "%s: %s",
618 __func__
, get_usb_statmsg(urb
->status
));
620 case -ENODEV
: /* device removed */
621 case -ESHUTDOWN
: /* device shut down */
622 //FIXME use this as disconnect indicator?
623 gig_dbg(DEBUG_USBREQ
, "%s: device disconnected", __func__
);
625 default: /* severe trouble */
626 dev_warn(cs
->dev
, "interrupt read: %s\n",
627 get_usb_statmsg(urb
->status
));
628 //FIXME corrective action? resubmission always ok?
632 /* drop incomplete packets even if the missing bytes wouldn't matter */
633 if (unlikely(urb
->actual_length
< 3)) {
634 dev_warn(cs
->dev
, "incomplete interrupt packet (%d bytes)\n",
639 l
= (unsigned) ucs
->int_in_buf
[1] +
640 (((unsigned) ucs
->int_in_buf
[2]) << 8);
642 gig_dbg(DEBUG_USBREQ
, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])",
643 urb
->actual_length
, (int)ucs
->int_in_buf
[0], l
,
644 (int)ucs
->int_in_buf
[1], (int)ucs
->int_in_buf
[2]);
648 switch (ucs
->int_in_buf
[0]) {
649 case HD_DEVICE_INIT_OK
:
650 update_basstate(ucs
, BS_INIT
, 0);
653 case HD_READY_SEND_ATDATA
:
654 del_timer(&ucs
->timer_atrdy
);
655 update_basstate(ucs
, BS_ATREADY
, BS_ATTIMER
);
659 case HD_OPEN_B2CHANNEL_ACK
:
661 case HD_OPEN_B1CHANNEL_ACK
:
662 bcs
= cs
->bcs
+ channel
;
663 update_basstate(ucs
, BS_B1OPEN
<< channel
, 0);
664 gigaset_bchannel_up(bcs
);
667 case HD_OPEN_ATCHANNEL_ACK
:
668 update_basstate(ucs
, BS_ATOPEN
, 0);
672 case HD_CLOSE_B2CHANNEL_ACK
:
674 case HD_CLOSE_B1CHANNEL_ACK
:
675 bcs
= cs
->bcs
+ channel
;
676 update_basstate(ucs
, 0, BS_B1OPEN
<< channel
);
677 stopurbs(bcs
->hw
.bas
);
678 gigaset_bchannel_down(bcs
);
681 case HD_CLOSE_ATCHANNEL_ACK
:
682 update_basstate(ucs
, 0, BS_ATOPEN
);
685 case HD_B2_FLOW_CONTROL
:
687 case HD_B1_FLOW_CONTROL
:
688 bcs
= cs
->bcs
+ channel
;
689 atomic_add((l
- BAS_NORMFRAME
) * BAS_CORRFRAMES
,
690 &bcs
->hw
.bas
->corrbytes
);
692 "Flow control (channel %d, sub %d): 0x%02x => %d",
693 channel
, bcs
->hw
.bas
->numsub
, l
,
694 atomic_read(&bcs
->hw
.bas
->corrbytes
));
697 case HD_RECEIVEATDATA_ACK
: /* AT response ready to be received */
700 "HD_RECEIVEATDATA_ACK with length 0 ignored\n");
703 spin_lock_irqsave(&cs
->lock
, flags
);
704 if (ucs
->rcvbuf_size
) {
705 /* throw away previous buffer - we have no queue */
707 "receive AT data overrun, %d bytes lost\n",
710 ucs
->rcvbuf_size
= 0;
712 if ((ucs
->rcvbuf
= kmalloc(l
, GFP_ATOMIC
)) == NULL
) {
713 spin_unlock_irqrestore(&cs
->lock
, flags
);
714 dev_err(cs
->dev
, "out of memory receiving AT data\n");
718 ucs
->rcvbuf_size
= l
;
719 ucs
->retry_cmd_in
= 0;
720 if ((rc
= atread_submit(cs
, BAS_TIMEOUT
)) < 0) {
723 ucs
->rcvbuf_size
= 0;
725 //FIXME corrective action?
726 spin_unlock_irqrestore(&cs
->lock
, flags
);
731 spin_unlock_irqrestore(&cs
->lock
, flags
);
734 case HD_RESET_INTERRUPT_PIPE_ACK
:
735 gig_dbg(DEBUG_USBREQ
, "HD_RESET_INTERRUPT_PIPE_ACK");
739 gig_dbg(DEBUG_USBREQ
, "HD_SUSPEND_END");
744 "unknown Gigaset signal 0x%02x (%u) ignored\n",
745 (int) ucs
->int_in_buf
[0], l
);
751 rc
= usb_submit_urb(urb
, SLAB_ATOMIC
);
752 if (unlikely(rc
!= 0 && rc
!= -ENODEV
)) {
753 dev_err(cs
->dev
, "could not resubmit interrupt URB: %s\n",
760 * USB completion handler for B channel isochronous input
761 * called by the USB subsystem in interrupt context
763 * urb USB request block of completed request
764 * urb->context = bc_state structure
766 static void read_iso_callback(struct urb
*urb
, struct pt_regs
*regs
)
768 struct bc_state
*bcs
;
769 struct bas_bc_state
*ubc
;
773 /* status codes not worth bothering the tasklet with */
774 if (unlikely(urb
->status
== -ENOENT
||
775 urb
->status
== -ECONNRESET
||
776 urb
->status
== -EINPROGRESS
||
777 urb
->status
== -ENODEV
||
778 urb
->status
== -ESHUTDOWN
)) {
779 gig_dbg(DEBUG_ISO
, "%s: %s",
780 __func__
, get_usb_statmsg(urb
->status
));
787 spin_lock_irqsave(&ubc
->isoinlock
, flags
);
788 if (likely(ubc
->isoindone
== NULL
)) {
789 /* pass URB to tasklet */
790 ubc
->isoindone
= urb
;
791 tasklet_schedule(&ubc
->rcvd_tasklet
);
793 /* tasklet still busy, drop data and resubmit URB */
794 ubc
->loststatus
= urb
->status
;
795 for (i
= 0; i
< BAS_NUMFRAMES
; i
++) {
796 ubc
->isoinlost
+= urb
->iso_frame_desc
[i
].actual_length
;
797 if (unlikely(urb
->iso_frame_desc
[i
].status
!= 0 &&
798 urb
->iso_frame_desc
[i
].status
!=
800 ubc
->loststatus
= urb
->iso_frame_desc
[i
].status
;
801 urb
->iso_frame_desc
[i
].status
= 0;
802 urb
->iso_frame_desc
[i
].actual_length
= 0;
804 if (likely(atomic_read(&ubc
->running
))) {
805 /* urb->dev is clobbered by USB subsystem */
806 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
807 urb
->transfer_flags
= URB_ISO_ASAP
;
808 urb
->number_of_packets
= BAS_NUMFRAMES
;
809 gig_dbg(DEBUG_ISO
, "%s: isoc read overrun/resubmit",
811 rc
= usb_submit_urb(urb
, SLAB_ATOMIC
);
812 if (unlikely(rc
!= 0 && rc
!= -ENODEV
)) {
813 dev_err(bcs
->cs
->dev
,
814 "could not resubmit isochronous read "
815 "URB: %s\n", get_usb_rcmsg(rc
));
816 dump_urb(DEBUG_ISO
, "isoc read", urb
);
821 spin_unlock_irqrestore(&ubc
->isoinlock
, flags
);
824 /* write_iso_callback
825 * USB completion handler for B channel isochronous output
826 * called by the USB subsystem in interrupt context
828 * urb USB request block of completed request
829 * urb->context = isow_urbctx_t structure
831 static void write_iso_callback(struct urb
*urb
, struct pt_regs
*regs
)
833 struct isow_urbctx_t
*ucx
;
834 struct bas_bc_state
*ubc
;
837 /* status codes not worth bothering the tasklet with */
838 if (unlikely(urb
->status
== -ENOENT
||
839 urb
->status
== -ECONNRESET
||
840 urb
->status
== -EINPROGRESS
||
841 urb
->status
== -ENODEV
||
842 urb
->status
== -ESHUTDOWN
)) {
843 gig_dbg(DEBUG_ISO
, "%s: %s",
844 __func__
, get_usb_statmsg(urb
->status
));
848 /* pass URB context to tasklet */
850 ubc
= ucx
->bcs
->hw
.bas
;
852 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
853 ubc
->isooutovfl
= ubc
->isooutdone
;
854 ubc
->isooutdone
= ucx
;
855 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
856 tasklet_schedule(&ubc
->sent_tasklet
);
860 * prepare and submit USB request blocks for isochronous input and output
862 * B channel control structure
865 * < 0 on error (no URBs submitted)
867 static int starturbs(struct bc_state
*bcs
)
869 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
874 /* initialize L2 reception */
875 if (bcs
->proto2
== ISDN_PROTO_L2_HDLC
)
876 bcs
->inputstate
|= INS_flag_hunt
;
878 /* submit all isochronous input URBs */
879 atomic_set(&ubc
->running
, 1);
880 for (k
= 0; k
< BAS_INURBS
; k
++) {
881 urb
= ubc
->isoinurbs
[k
];
887 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
888 urb
->pipe
= usb_rcvisocpipe(urb
->dev
, 3 + 2 * bcs
->channel
);
889 urb
->transfer_flags
= URB_ISO_ASAP
;
890 urb
->transfer_buffer
= ubc
->isoinbuf
+ k
* BAS_INBUFSIZE
;
891 urb
->transfer_buffer_length
= BAS_INBUFSIZE
;
892 urb
->number_of_packets
= BAS_NUMFRAMES
;
893 urb
->interval
= BAS_FRAMETIME
;
894 urb
->complete
= read_iso_callback
;
896 for (j
= 0; j
< BAS_NUMFRAMES
; j
++) {
897 urb
->iso_frame_desc
[j
].offset
= j
* BAS_MAXFRAME
;
898 urb
->iso_frame_desc
[j
].length
= BAS_MAXFRAME
;
899 urb
->iso_frame_desc
[j
].status
= 0;
900 urb
->iso_frame_desc
[j
].actual_length
= 0;
903 dump_urb(DEBUG_ISO
, "Initial isoc read", urb
);
904 if ((rc
= usb_submit_urb(urb
, SLAB_ATOMIC
)) != 0)
908 /* initialize L2 transmission */
909 gigaset_isowbuf_init(ubc
->isooutbuf
, PPP_FLAG
);
911 /* set up isochronous output URBs for flag idling */
912 for (k
= 0; k
< BAS_OUTURBS
; ++k
) {
913 urb
= ubc
->isoouturbs
[k
].urb
;
918 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
919 urb
->pipe
= usb_sndisocpipe(urb
->dev
, 4 + 2 * bcs
->channel
);
920 urb
->transfer_flags
= URB_ISO_ASAP
;
921 urb
->transfer_buffer
= ubc
->isooutbuf
->data
;
922 urb
->transfer_buffer_length
= sizeof(ubc
->isooutbuf
->data
);
923 urb
->number_of_packets
= BAS_NUMFRAMES
;
924 urb
->interval
= BAS_FRAMETIME
;
925 urb
->complete
= write_iso_callback
;
926 urb
->context
= &ubc
->isoouturbs
[k
];
927 for (j
= 0; j
< BAS_NUMFRAMES
; ++j
) {
928 urb
->iso_frame_desc
[j
].offset
= BAS_OUTBUFSIZE
;
929 urb
->iso_frame_desc
[j
].length
= BAS_NORMFRAME
;
930 urb
->iso_frame_desc
[j
].status
= 0;
931 urb
->iso_frame_desc
[j
].actual_length
= 0;
933 ubc
->isoouturbs
[k
].limit
= -1;
936 /* submit two URBs, keep third one */
937 for (k
= 0; k
< 2; ++k
) {
938 dump_urb(DEBUG_ISO
, "Initial isoc write", urb
);
939 rc
= usb_submit_urb(ubc
->isoouturbs
[k
].urb
, SLAB_ATOMIC
);
943 dump_urb(DEBUG_ISO
, "Initial isoc write (free)", urb
);
944 ubc
->isooutfree
= &ubc
->isoouturbs
[2];
945 ubc
->isooutdone
= ubc
->isooutovfl
= NULL
;
953 * cancel the USB request blocks for isochronous input and output
954 * errors are silently ignored
956 * B channel control structure
958 static void stopurbs(struct bas_bc_state
*ubc
)
962 atomic_set(&ubc
->running
, 0);
964 for (k
= 0; k
< BAS_INURBS
; ++k
) {
965 rc
= usb_unlink_urb(ubc
->isoinurbs
[k
]);
967 "%s: isoc input URB %d unlinked, result = %s",
968 __func__
, k
, get_usb_rcmsg(rc
));
971 for (k
= 0; k
< BAS_OUTURBS
; ++k
) {
972 rc
= usb_unlink_urb(ubc
->isoouturbs
[k
].urb
);
974 "%s: isoc output URB %d unlinked, result = %s",
975 __func__
, k
, get_usb_rcmsg(rc
));
979 /* Isochronous Write - Bottom Half */
980 /* =============================== */
982 /* submit_iso_write_urb
983 * fill and submit the next isochronous write URB
985 * ucx context structure containing URB
987 * number of frames submitted in URB
988 * 0 if URB not submitted because no data available (isooutbuf busy)
989 * error code < 0 on error
991 static int submit_iso_write_urb(struct isow_urbctx_t
*ucx
)
993 struct urb
*urb
= ucx
->urb
;
994 struct bas_bc_state
*ubc
= ucx
->bcs
->hw
.bas
;
995 struct usb_iso_packet_descriptor
*ifd
;
996 int corrbytes
, nframe
, rc
;
998 /* urb->dev is clobbered by USB subsystem */
999 urb
->dev
= ucx
->bcs
->cs
->hw
.bas
->udev
;
1000 urb
->transfer_flags
= URB_ISO_ASAP
;
1001 urb
->transfer_buffer
= ubc
->isooutbuf
->data
;
1002 urb
->transfer_buffer_length
= sizeof(ubc
->isooutbuf
->data
);
1004 for (nframe
= 0; nframe
< BAS_NUMFRAMES
; nframe
++) {
1005 ifd
= &urb
->iso_frame_desc
[nframe
];
1007 /* compute frame length according to flow control */
1008 ifd
->length
= BAS_NORMFRAME
;
1009 if ((corrbytes
= atomic_read(&ubc
->corrbytes
)) != 0) {
1010 gig_dbg(DEBUG_ISO
, "%s: corrbytes=%d",
1011 __func__
, corrbytes
);
1012 if (corrbytes
> BAS_HIGHFRAME
- BAS_NORMFRAME
)
1013 corrbytes
= BAS_HIGHFRAME
- BAS_NORMFRAME
;
1014 else if (corrbytes
< BAS_LOWFRAME
- BAS_NORMFRAME
)
1015 corrbytes
= BAS_LOWFRAME
- BAS_NORMFRAME
;
1016 ifd
->length
+= corrbytes
;
1017 atomic_add(-corrbytes
, &ubc
->corrbytes
);
1020 /* retrieve block of data to send */
1021 ifd
->offset
= gigaset_isowbuf_getbytes(ubc
->isooutbuf
,
1023 if (ifd
->offset
< 0) {
1024 if (ifd
->offset
== -EBUSY
) {
1026 "%s: buffer busy at frame %d",
1028 /* tasklet will be restarted from
1029 gigaset_send_skb() */
1031 dev_err(ucx
->bcs
->cs
->dev
,
1032 "%s: buffer error %d at frame %d\n",
1033 __func__
, ifd
->offset
, nframe
);
1038 ucx
->limit
= atomic_read(&ubc
->isooutbuf
->nextread
);
1040 ifd
->actual_length
= 0;
1042 if (unlikely(nframe
== 0))
1043 return 0; /* no data to send */
1044 urb
->number_of_packets
= nframe
;
1046 rc
= usb_submit_urb(urb
, SLAB_ATOMIC
);
1049 /* device removed - give up silently */
1050 gig_dbg(DEBUG_ISO
, "%s: disconnected", __func__
);
1052 dev_err(ucx
->bcs
->cs
->dev
,
1053 "could not submit isochronous write URB: %s\n",
1061 /* write_iso_tasklet
1062 * tasklet scheduled when an isochronous output URB from the Gigaset device
1065 * data B channel state structure
1067 static void write_iso_tasklet(unsigned long data
)
1069 struct bc_state
*bcs
= (struct bc_state
*) data
;
1070 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
1071 struct cardstate
*cs
= bcs
->cs
;
1072 struct isow_urbctx_t
*done
, *next
, *ovfl
;
1074 struct usb_iso_packet_descriptor
*ifd
;
1076 unsigned long flags
;
1078 struct sk_buff
*skb
;
1082 /* loop while completed URBs arrive in time */
1084 if (unlikely(!(atomic_read(&ubc
->running
)))) {
1085 gig_dbg(DEBUG_ISO
, "%s: not running", __func__
);
1089 /* retrieve completed URBs */
1090 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1091 done
= ubc
->isooutdone
;
1092 ubc
->isooutdone
= NULL
;
1093 ovfl
= ubc
->isooutovfl
;
1094 ubc
->isooutovfl
= NULL
;
1095 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1097 dev_err(cs
->dev
, "isochronous write buffer underrun\n");
1104 /* submit free URB if available */
1105 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1106 next
= ubc
->isooutfree
;
1107 ubc
->isooutfree
= NULL
;
1108 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1110 rc
= submit_iso_write_urb(next
);
1111 if (unlikely(rc
<= 0 && rc
!= -ENODEV
)) {
1112 /* could not submit URB, put it back */
1113 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1114 if (ubc
->isooutfree
== NULL
) {
1115 ubc
->isooutfree
= next
;
1118 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1120 /* couldn't put it back */
1122 "losing isochronous write URB\n");
1128 /* process completed URB */
1130 switch (urb
->status
) {
1131 case -EXDEV
: /* partial completion */
1132 gig_dbg(DEBUG_ISO
, "%s: URB partially completed",
1134 /* fall through - what's the difference anyway? */
1135 case 0: /* normal completion */
1136 /* inspect individual frames
1137 * assumptions (for lack of documentation):
1138 * - actual_length bytes of first frame in error are
1140 * - all following frames are not sent at all
1142 offset
= done
->limit
; /* default (no error) */
1143 for (i
= 0; i
< BAS_NUMFRAMES
; i
++) {
1144 ifd
= &urb
->iso_frame_desc
[i
];
1146 ifd
->actual_length
!= ifd
->length
) {
1148 "isochronous write: frame %d: %s, "
1149 "only %d of %d bytes sent\n",
1150 i
, get_usb_statmsg(ifd
->status
),
1151 ifd
->actual_length
, ifd
->length
);
1152 offset
= (ifd
->offset
+
1158 #ifdef CONFIG_GIGASET_DEBUG
1159 /* check assumption on remaining frames */
1160 for (; i
< BAS_NUMFRAMES
; i
++) {
1161 ifd
= &urb
->iso_frame_desc
[i
];
1162 if (ifd
->status
!= -EINPROGRESS
1163 || ifd
->actual_length
!= 0) {
1165 "isochronous write: frame %d: %s, "
1166 "%d of %d bytes sent\n",
1167 i
, get_usb_statmsg(ifd
->status
),
1168 ifd
->actual_length
, ifd
->length
);
1169 offset
= (ifd
->offset
+
1177 case -EPIPE
: /* stall - probably underrun */
1178 dev_err(cs
->dev
, "isochronous write stalled\n");
1181 default: /* severe trouble */
1182 dev_warn(cs
->dev
, "isochronous write: %s\n",
1183 get_usb_statmsg(urb
->status
));
1186 /* mark the write buffer area covered by this URB as free */
1187 if (done
->limit
>= 0)
1188 atomic_set(&ubc
->isooutbuf
->read
, done
->limit
);
1190 /* mark URB as free */
1191 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1192 next
= ubc
->isooutfree
;
1193 ubc
->isooutfree
= done
;
1194 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1196 /* only one URB still active - resubmit one */
1197 rc
= submit_iso_write_urb(next
);
1198 if (unlikely(rc
<= 0 && rc
!= -ENODEV
)) {
1199 /* couldn't submit */
1205 /* process queued SKBs */
1206 while ((skb
= skb_dequeue(&bcs
->squeue
))) {
1207 /* copy to output buffer, doing L2 encapsulation */
1209 if (gigaset_isoc_buildframe(bcs
, skb
->data
, len
) == -EAGAIN
) {
1210 /* insufficient buffer space, push back onto queue */
1211 skb_queue_head(&bcs
->squeue
, skb
);
1212 gig_dbg(DEBUG_ISO
, "%s: skb requeued, qlen=%d",
1213 __func__
, skb_queue_len(&bcs
->squeue
));
1217 gigaset_skb_sent(bcs
, skb
);
1218 dev_kfree_skb_any(skb
);
1222 /* Isochronous Read - Bottom Half */
1223 /* ============================== */
1226 * tasklet scheduled when an isochronous input URB from the Gigaset device
1229 * data B channel state structure
1231 static void read_iso_tasklet(unsigned long data
)
1233 struct bc_state
*bcs
= (struct bc_state
*) data
;
1234 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
1235 struct cardstate
*cs
= bcs
->cs
;
1238 unsigned long flags
;
1239 int totleft
, numbytes
, offset
, frame
, rc
;
1241 /* loop while more completed URBs arrive in the meantime */
1244 spin_lock_irqsave(&ubc
->isoinlock
, flags
);
1245 if (!(urb
= ubc
->isoindone
)) {
1246 spin_unlock_irqrestore(&ubc
->isoinlock
, flags
);
1249 ubc
->isoindone
= NULL
;
1250 if (unlikely(ubc
->loststatus
!= -EINPROGRESS
)) {
1252 "isochronous read overrun, "
1253 "dropped URB with status: %s, %d bytes lost\n",
1254 get_usb_statmsg(ubc
->loststatus
),
1256 ubc
->loststatus
= -EINPROGRESS
;
1258 spin_unlock_irqrestore(&ubc
->isoinlock
, flags
);
1260 if (unlikely(!(atomic_read(&ubc
->running
)))) {
1262 "%s: channel not running, "
1263 "dropped URB with status: %s",
1264 __func__
, get_usb_statmsg(urb
->status
));
1268 switch (urb
->status
) {
1269 case 0: /* normal completion */
1271 case -EXDEV
: /* inspect individual frames
1272 (we do that anyway) */
1273 gig_dbg(DEBUG_ISO
, "%s: URB partially completed",
1279 gig_dbg(DEBUG_ISO
, "%s: %s",
1280 __func__
, get_usb_statmsg(urb
->status
));
1281 continue; /* -> skip */
1283 dev_err(cs
->dev
, "isochronous read stalled\n");
1285 continue; /* -> skip */
1286 default: /* severe trouble */
1287 dev_warn(cs
->dev
, "isochronous read: %s\n",
1288 get_usb_statmsg(urb
->status
));
1292 rcvbuf
= urb
->transfer_buffer
;
1293 totleft
= urb
->actual_length
;
1294 for (frame
= 0; totleft
> 0 && frame
< BAS_NUMFRAMES
; frame
++) {
1295 if (unlikely(urb
->iso_frame_desc
[frame
].status
)) {
1297 "isochronous read: frame %d: %s\n",
1300 urb
->iso_frame_desc
[frame
].status
));
1303 numbytes
= urb
->iso_frame_desc
[frame
].actual_length
;
1304 if (unlikely(numbytes
> BAS_MAXFRAME
)) {
1306 "isochronous read: frame %d: "
1307 "numbytes (%d) > BAS_MAXFRAME\n",
1311 if (unlikely(numbytes
> totleft
)) {
1313 "isochronous read: frame %d: "
1314 "numbytes (%d) > totleft (%d)\n",
1315 frame
, numbytes
, totleft
);
1318 offset
= urb
->iso_frame_desc
[frame
].offset
;
1319 if (unlikely(offset
+ numbytes
> BAS_INBUFSIZE
)) {
1321 "isochronous read: frame %d: "
1322 "offset (%d) + numbytes (%d) "
1323 "> BAS_INBUFSIZE\n",
1324 frame
, offset
, numbytes
);
1327 gigaset_isoc_receive(rcvbuf
+ offset
, numbytes
, bcs
);
1328 totleft
-= numbytes
;
1330 if (unlikely(totleft
> 0))
1332 "isochronous read: %d data bytes missing\n",
1336 /* URB processed, resubmit */
1337 for (frame
= 0; frame
< BAS_NUMFRAMES
; frame
++) {
1338 urb
->iso_frame_desc
[frame
].status
= 0;
1339 urb
->iso_frame_desc
[frame
].actual_length
= 0;
1341 /* urb->dev is clobbered by USB subsystem */
1342 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
1343 urb
->transfer_flags
= URB_ISO_ASAP
;
1344 urb
->number_of_packets
= BAS_NUMFRAMES
;
1345 rc
= usb_submit_urb(urb
, SLAB_ATOMIC
);
1346 if (unlikely(rc
!= 0 && rc
!= -ENODEV
)) {
1348 "could not resubmit isochronous read URB: %s\n",
1350 dump_urb(DEBUG_ISO
, "resubmit iso read", urb
);
1356 /* Channel Operations */
1357 /* ================== */
1360 * timeout routine for control output request
1362 * B channel control structure
1364 static void req_timeout(unsigned long data
)
1366 struct bc_state
*bcs
= (struct bc_state
*) data
;
1367 struct bas_cardstate
*ucs
= bcs
->cs
->hw
.bas
;
1369 unsigned long flags
;
1373 spin_lock_irqsave(&ucs
->lock
, flags
);
1374 pending
= ucs
->pending
;
1376 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1379 case 0: /* no pending request */
1380 gig_dbg(DEBUG_USBREQ
, "%s: no request pending", __func__
);
1383 case HD_OPEN_ATCHANNEL
:
1384 dev_err(bcs
->cs
->dev
, "timeout opening AT channel\n");
1385 error_reset(bcs
->cs
);
1388 case HD_OPEN_B2CHANNEL
:
1389 case HD_OPEN_B1CHANNEL
:
1390 dev_err(bcs
->cs
->dev
, "timeout opening channel %d\n",
1395 case HD_CLOSE_ATCHANNEL
:
1396 dev_err(bcs
->cs
->dev
, "timeout closing AT channel\n");
1399 case HD_CLOSE_B2CHANNEL
:
1400 case HD_CLOSE_B1CHANNEL
:
1401 dev_err(bcs
->cs
->dev
, "timeout closing channel %d\n",
1403 error_reset(bcs
->cs
);
1407 dev_warn(bcs
->cs
->dev
, "request 0x%02x timed out, clearing\n",
1412 /* write_ctrl_callback
1413 * USB completion handler for control pipe output
1414 * called by the USB subsystem in interrupt context
1416 * urb USB request block of completed request
1417 * urb->context = hardware specific controller state structure
1419 static void write_ctrl_callback(struct urb
*urb
, struct pt_regs
*regs
)
1421 struct bas_cardstate
*ucs
= urb
->context
;
1423 unsigned long flags
;
1426 switch (urb
->status
) {
1427 case 0: /* normal completion */
1428 spin_lock_irqsave(&ucs
->lock
, flags
);
1429 switch (ucs
->pending
) {
1430 case HD_DEVICE_INIT_ACK
: /* no reply expected */
1431 del_timer(&ucs
->timer_ctrl
);
1435 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1438 case -ENOENT
: /* cancelled */
1439 case -ECONNRESET
: /* cancelled (async) */
1440 case -EINPROGRESS
: /* pending */
1441 case -ENODEV
: /* device removed */
1442 case -ESHUTDOWN
: /* device shut down */
1443 /* ignore silently */
1444 gig_dbg(DEBUG_USBREQ
, "%s: %s",
1445 __func__
, get_usb_statmsg(urb
->status
));
1448 default: /* any failure */
1449 if (++ucs
->retry_ctrl
> BAS_RETRY
) {
1450 dev_err(&ucs
->interface
->dev
,
1451 "control request 0x%02x failed: %s\n",
1452 ucs
->dr_ctrl
.bRequest
,
1453 get_usb_statmsg(urb
->status
));
1454 break; /* give up */
1456 dev_notice(&ucs
->interface
->dev
,
1457 "control request 0x%02x: %s, retry %d\n",
1458 ucs
->dr_ctrl
.bRequest
, get_usb_statmsg(urb
->status
),
1460 /* urb->dev is clobbered by USB subsystem */
1461 urb
->dev
= ucs
->udev
;
1462 rc
= usb_submit_urb(urb
, SLAB_ATOMIC
);
1464 dev_err(&ucs
->interface
->dev
,
1465 "could not resubmit request 0x%02x: %s\n",
1466 ucs
->dr_ctrl
.bRequest
, get_usb_rcmsg(rc
));
1473 /* failed, clear pending request */
1474 spin_lock_irqsave(&ucs
->lock
, flags
);
1475 del_timer(&ucs
->timer_ctrl
);
1477 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1481 * submit a control output request without message buffer to the Gigaset base
1482 * and optionally start a timeout
1484 * bcs B channel control structure
1485 * req control request code (HD_*)
1486 * val control request parameter value (set to 0 if unused)
1487 * timeout timeout in seconds (0: no timeout)
1490 * -EBUSY if another request is pending
1491 * any URB submission error code
1493 static int req_submit(struct bc_state
*bcs
, int req
, int val
, int timeout
)
1495 struct bas_cardstate
*ucs
= bcs
->cs
->hw
.bas
;
1497 unsigned long flags
;
1499 gig_dbg(DEBUG_USBREQ
, "-------> 0x%02x (%d)", req
, val
);
1501 spin_lock_irqsave(&ucs
->lock
, flags
);
1503 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1504 dev_err(bcs
->cs
->dev
,
1505 "submission of request 0x%02x failed: "
1506 "request 0x%02x still pending\n",
1511 ucs
->dr_ctrl
.bRequestType
= OUT_VENDOR_REQ
;
1512 ucs
->dr_ctrl
.bRequest
= req
;
1513 ucs
->dr_ctrl
.wValue
= cpu_to_le16(val
);
1514 ucs
->dr_ctrl
.wIndex
= 0;
1515 ucs
->dr_ctrl
.wLength
= 0;
1516 usb_fill_control_urb(ucs
->urb_ctrl
, ucs
->udev
,
1517 usb_sndctrlpipe(ucs
->udev
, 0),
1518 (unsigned char*) &ucs
->dr_ctrl
, NULL
, 0,
1519 write_ctrl_callback
, ucs
);
1520 ucs
->retry_ctrl
= 0;
1521 ret
= usb_submit_urb(ucs
->urb_ctrl
, SLAB_ATOMIC
);
1522 if (unlikely(ret
)) {
1523 dev_err(bcs
->cs
->dev
, "could not submit request 0x%02x: %s\n",
1524 req
, get_usb_rcmsg(ret
));
1525 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1531 gig_dbg(DEBUG_USBREQ
, "setting timeout of %d/10 secs", timeout
);
1532 ucs
->timer_ctrl
.expires
= jiffies
+ timeout
* HZ
/ 10;
1533 ucs
->timer_ctrl
.data
= (unsigned long) bcs
;
1534 ucs
->timer_ctrl
.function
= req_timeout
;
1535 add_timer(&ucs
->timer_ctrl
);
1538 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1542 /* gigaset_init_bchannel
1543 * called by common.c to connect a B channel
1544 * initialize isochronous I/O and tell the Gigaset base to open the channel
1546 * B channel control structure
1548 * 0 on success, error code < 0 on error
1550 static int gigaset_init_bchannel(struct bc_state
*bcs
)
1553 unsigned long flags
;
1555 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
1556 if (unlikely(!bcs
->cs
->connected
)) {
1557 gig_dbg(DEBUG_USBREQ
, "%s: not connected", __func__
);
1558 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
1562 if ((ret
= starturbs(bcs
)) < 0) {
1563 dev_err(bcs
->cs
->dev
,
1564 "could not start isochronous I/O for channel B%d: %s\n",
1566 ret
== -EFAULT
? "null URB" : get_usb_rcmsg(ret
));
1569 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
1573 req
= bcs
->channel
? HD_OPEN_B2CHANNEL
: HD_OPEN_B1CHANNEL
;
1574 if ((ret
= req_submit(bcs
, req
, 0, BAS_TIMEOUT
)) < 0) {
1575 dev_err(bcs
->cs
->dev
, "could not open channel B%d\n",
1577 stopurbs(bcs
->hw
.bas
);
1582 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
1586 /* gigaset_close_bchannel
1587 * called by common.c to disconnect a B channel
1588 * tell the Gigaset base to close the channel
1589 * stopping isochronous I/O and LL notification will be done when the
1590 * acknowledgement for the close arrives
1592 * B channel control structure
1594 * 0 on success, error code < 0 on error
1596 static int gigaset_close_bchannel(struct bc_state
*bcs
)
1599 unsigned long flags
;
1601 spin_lock_irqsave(&bcs
->cs
->lock
, flags
);
1602 if (unlikely(!bcs
->cs
->connected
)) {
1603 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
1604 gig_dbg(DEBUG_USBREQ
, "%s: not connected", __func__
);
1608 if (!(atomic_read(&bcs
->cs
->hw
.bas
->basstate
) &
1609 (bcs
->channel
? BS_B2OPEN
: BS_B1OPEN
))) {
1610 /* channel not running: just signal common.c */
1611 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
1612 gigaset_bchannel_down(bcs
);
1616 /* channel running: tell device to close it */
1617 req
= bcs
->channel
? HD_CLOSE_B2CHANNEL
: HD_CLOSE_B1CHANNEL
;
1618 if ((ret
= req_submit(bcs
, req
, 0, BAS_TIMEOUT
)) < 0)
1619 dev_err(bcs
->cs
->dev
, "closing channel B%d failed\n",
1622 spin_unlock_irqrestore(&bcs
->cs
->lock
, flags
);
1626 /* Device Operations */
1627 /* ================= */
1630 * unqueue first command buffer from queue, waking any sleepers
1631 * must be called with cs->cmdlock held
1633 * cs controller state structure
1635 static void complete_cb(struct cardstate
*cs
)
1637 struct cmdbuf_t
*cb
= cs
->cmdbuf
;
1639 /* unqueue completed buffer */
1640 cs
->cmdbytes
-= cs
->curlen
;
1641 gig_dbg(DEBUG_TRANSCMD
|DEBUG_LOCKCMD
,
1642 "write_command: sent %u bytes, %u left",
1643 cs
->curlen
, cs
->cmdbytes
);
1644 if ((cs
->cmdbuf
= cb
->next
) != NULL
) {
1645 cs
->cmdbuf
->prev
= NULL
;
1646 cs
->curlen
= cs
->cmdbuf
->len
;
1648 cs
->lastcmdbuf
= NULL
;
1652 if (cb
->wake_tasklet
)
1653 tasklet_schedule(cb
->wake_tasklet
);
1658 /* write_command_callback
1659 * USB completion handler for AT command transmission
1660 * called by the USB subsystem in interrupt context
1662 * urb USB request block of completed request
1663 * urb->context = controller state structure
1665 static void write_command_callback(struct urb
*urb
, struct pt_regs
*regs
)
1667 struct cardstate
*cs
= urb
->context
;
1668 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1669 unsigned long flags
;
1671 update_basstate(ucs
, 0, BS_ATWRPEND
);
1674 switch (urb
->status
) {
1675 case 0: /* normal completion */
1677 case -ENOENT
: /* cancelled */
1678 case -ECONNRESET
: /* cancelled (async) */
1679 case -EINPROGRESS
: /* pending */
1680 case -ENODEV
: /* device removed */
1681 case -ESHUTDOWN
: /* device shut down */
1682 /* ignore silently */
1683 gig_dbg(DEBUG_USBREQ
, "%s: %s",
1684 __func__
, get_usb_statmsg(urb
->status
));
1686 default: /* any failure */
1687 if (++ucs
->retry_cmd_out
> BAS_RETRY
) {
1689 "command write: %s, "
1690 "giving up after %d retries\n",
1691 get_usb_statmsg(urb
->status
),
1692 ucs
->retry_cmd_out
);
1695 if (cs
->cmdbuf
== NULL
) {
1697 "command write: %s, "
1698 "cannot retry - cmdbuf gone\n",
1699 get_usb_statmsg(urb
->status
));
1702 dev_notice(cs
->dev
, "command write: %s, retry %d\n",
1703 get_usb_statmsg(urb
->status
), ucs
->retry_cmd_out
);
1704 if (atwrite_submit(cs
, cs
->cmdbuf
->buf
, cs
->cmdbuf
->len
) >= 0)
1705 /* resubmitted - bypass regular exit block */
1707 /* command send failed, assume base still waiting */
1708 update_basstate(ucs
, BS_ATREADY
, 0);
1711 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1712 if (cs
->cmdbuf
!= NULL
)
1714 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1718 * timeout routine for AT command transmission
1720 * controller state structure
1722 static void atrdy_timeout(unsigned long data
)
1724 struct cardstate
*cs
= (struct cardstate
*) data
;
1725 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1727 dev_warn(cs
->dev
, "timeout waiting for HD_READY_SEND_ATDATA\n");
1729 /* fake the missing signal - what else can I do? */
1730 update_basstate(ucs
, BS_ATREADY
, BS_ATTIMER
);
1735 * submit an HD_WRITE_ATMESSAGE command URB
1737 * cs controller state structure
1738 * buf buffer containing command to send
1739 * len length of command to send
1742 * -EBUSY if another request is pending
1743 * any URB submission error code
1745 static int atwrite_submit(struct cardstate
*cs
, unsigned char *buf
, int len
)
1747 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1750 gig_dbg(DEBUG_USBREQ
, "-------> HD_WRITE_ATMESSAGE (%d)", len
);
1752 if (update_basstate(ucs
, BS_ATWRPEND
, 0) & BS_ATWRPEND
) {
1754 "could not submit HD_WRITE_ATMESSAGE: URB busy\n");
1758 ucs
->dr_cmd_out
.bRequestType
= OUT_VENDOR_REQ
;
1759 ucs
->dr_cmd_out
.bRequest
= HD_WRITE_ATMESSAGE
;
1760 ucs
->dr_cmd_out
.wValue
= 0;
1761 ucs
->dr_cmd_out
.wIndex
= 0;
1762 ucs
->dr_cmd_out
.wLength
= cpu_to_le16(len
);
1763 usb_fill_control_urb(ucs
->urb_cmd_out
, ucs
->udev
,
1764 usb_sndctrlpipe(ucs
->udev
, 0),
1765 (unsigned char*) &ucs
->dr_cmd_out
, buf
, len
,
1766 write_command_callback
, cs
);
1767 rc
= usb_submit_urb(ucs
->urb_cmd_out
, SLAB_ATOMIC
);
1769 update_basstate(ucs
, 0, BS_ATWRPEND
);
1770 dev_err(cs
->dev
, "could not submit HD_WRITE_ATMESSAGE: %s\n",
1775 /* submitted successfully, start timeout if necessary */
1776 if (!(update_basstate(ucs
, BS_ATTIMER
, BS_ATREADY
) & BS_ATTIMER
)) {
1777 gig_dbg(DEBUG_OUTPUT
, "setting ATREADY timeout of %d/10 secs",
1779 ucs
->timer_atrdy
.expires
= jiffies
+ ATRDY_TIMEOUT
* HZ
/ 10;
1780 ucs
->timer_atrdy
.data
= (unsigned long) cs
;
1781 ucs
->timer_atrdy
.function
= atrdy_timeout
;
1782 add_timer(&ucs
->timer_atrdy
);
1788 * start transmission of AT command queue if necessary
1790 * cs controller state structure
1793 * error code < 0 on error
1795 static int start_cbsend(struct cardstate
*cs
)
1797 struct cmdbuf_t
*cb
;
1798 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1799 unsigned long flags
;
1803 /* check if AT channel is open */
1804 if (!(atomic_read(&ucs
->basstate
) & BS_ATOPEN
)) {
1805 gig_dbg(DEBUG_TRANSCMD
|DEBUG_LOCKCMD
, "AT channel not open");
1806 rc
= req_submit(cs
->bcs
, HD_OPEN_ATCHANNEL
, 0, BAS_TIMEOUT
);
1808 /* flush command queue */
1809 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1810 while (cs
->cmdbuf
!= NULL
)
1812 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1817 /* try to send first command in queue */
1818 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1820 while ((cb
= cs
->cmdbuf
) != NULL
&&
1821 atomic_read(&ucs
->basstate
) & BS_ATREADY
) {
1822 ucs
->retry_cmd_out
= 0;
1823 rc
= atwrite_submit(cs
, cb
->buf
, cb
->len
);
1830 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1834 /* gigaset_write_cmd
1835 * This function is called by the device independent part of the driver
1836 * to transmit an AT command string to the Gigaset device.
1837 * It encapsulates the device specific method for transmission over the
1838 * direct USB connection to the base.
1839 * The command string is added to the queue of commands to send, and
1840 * USB transmission is started if necessary.
1842 * cs controller state structure
1843 * buf command string to send
1844 * len number of bytes to send (max. IF_WRITEBUF)
1845 * wake_tasklet tasklet to run when transmission is completed
1848 * number of bytes queued on success
1849 * error code < 0 on error
1851 static int gigaset_write_cmd(struct cardstate
*cs
,
1852 const unsigned char *buf
, int len
,
1853 struct tasklet_struct
*wake_tasklet
)
1855 struct cmdbuf_t
*cb
;
1856 unsigned long flags
;
1859 gigaset_dbg_buffer(atomic_read(&cs
->mstate
) != MS_LOCKED
?
1860 DEBUG_TRANSCMD
: DEBUG_LOCKCMD
,
1861 "CMD Transmit", len
, buf
);
1864 return 0; /* nothing to do */
1866 if (len
> IF_WRITEBUF
)
1868 if (!(cb
= kmalloc(sizeof(struct cmdbuf_t
) + len
, GFP_ATOMIC
))) {
1869 dev_err(cs
->dev
, "%s: out of memory\n", __func__
);
1873 memcpy(cb
->buf
, buf
, len
);
1877 cb
->wake_tasklet
= wake_tasklet
;
1879 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1880 cb
->prev
= cs
->lastcmdbuf
;
1882 cs
->lastcmdbuf
->next
= cb
;
1887 cs
->cmdbytes
+= len
;
1888 cs
->lastcmdbuf
= cb
;
1889 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1891 spin_lock_irqsave(&cs
->lock
, flags
);
1892 if (unlikely(!cs
->connected
)) {
1893 spin_unlock_irqrestore(&cs
->lock
, flags
);
1894 gig_dbg(DEBUG_USBREQ
, "%s: not connected", __func__
);
1897 status
= start_cbsend(cs
);
1898 spin_unlock_irqrestore(&cs
->lock
, flags
);
1899 return status
< 0 ? status
: len
;
1902 /* gigaset_write_room
1903 * tty_driver.write_room interface routine
1904 * return number of characters the driver will accept to be written via
1907 * controller state structure
1909 * number of characters
1911 static int gigaset_write_room(struct cardstate
*cs
)
1916 /* gigaset_chars_in_buffer
1917 * tty_driver.chars_in_buffer interface routine
1918 * return number of characters waiting to be sent
1920 * controller state structure
1922 * number of characters
1924 static int gigaset_chars_in_buffer(struct cardstate
*cs
)
1926 unsigned long flags
;
1929 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1930 bytes
= cs
->cmdbytes
;
1931 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1937 * implementation of ioctl(GIGASET_BRKCHARS)
1939 * controller state structure
1941 * -EINVAL (unimplemented function)
1943 static int gigaset_brkchars(struct cardstate
*cs
, const unsigned char buf
[6])
1949 /* Device Initialization/Shutdown */
1950 /* ============================== */
1952 /* Free hardware dependent part of the B channel structure
1954 * bcs B channel structure
1958 static int gigaset_freebcshw(struct bc_state
*bcs
)
1960 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
1966 /* kill URBs and tasklets before freeing - better safe than sorry */
1967 atomic_set(&ubc
->running
, 0);
1968 for (i
= 0; i
< BAS_OUTURBS
; ++i
)
1969 if (ubc
->isoouturbs
[i
].urb
) {
1970 gig_dbg(DEBUG_INIT
, "%s: killing iso out URB %d",
1972 usb_kill_urb(ubc
->isoouturbs
[i
].urb
);
1973 usb_free_urb(ubc
->isoouturbs
[i
].urb
);
1975 for (i
= 0; i
< BAS_INURBS
; ++i
)
1976 if (ubc
->isoinurbs
[i
]) {
1977 gig_dbg(DEBUG_INIT
, "%s: killing iso in URB %d",
1979 usb_kill_urb(ubc
->isoinurbs
[i
]);
1980 usb_free_urb(ubc
->isoinurbs
[i
]);
1982 tasklet_kill(&ubc
->sent_tasklet
);
1983 tasklet_kill(&ubc
->rcvd_tasklet
);
1984 kfree(ubc
->isooutbuf
);
1990 /* Initialize hardware dependent part of the B channel structure
1992 * bcs B channel structure
1996 static int gigaset_initbcshw(struct bc_state
*bcs
)
1999 struct bas_bc_state
*ubc
;
2001 bcs
->hw
.bas
= ubc
= kmalloc(sizeof(struct bas_bc_state
), GFP_KERNEL
);
2003 err("could not allocate bas_bc_state");
2007 atomic_set(&ubc
->running
, 0);
2008 atomic_set(&ubc
->corrbytes
, 0);
2009 spin_lock_init(&ubc
->isooutlock
);
2010 for (i
= 0; i
< BAS_OUTURBS
; ++i
) {
2011 ubc
->isoouturbs
[i
].urb
= NULL
;
2012 ubc
->isoouturbs
[i
].bcs
= bcs
;
2014 ubc
->isooutdone
= ubc
->isooutfree
= ubc
->isooutovfl
= NULL
;
2016 if (!(ubc
->isooutbuf
= kmalloc(sizeof(struct isowbuf_t
), GFP_KERNEL
))) {
2017 err("could not allocate isochronous output buffer");
2022 tasklet_init(&ubc
->sent_tasklet
,
2023 &write_iso_tasklet
, (unsigned long) bcs
);
2025 spin_lock_init(&ubc
->isoinlock
);
2026 for (i
= 0; i
< BAS_INURBS
; ++i
)
2027 ubc
->isoinurbs
[i
] = NULL
;
2028 ubc
->isoindone
= NULL
;
2029 ubc
->loststatus
= -EINPROGRESS
;
2043 tasklet_init(&ubc
->rcvd_tasklet
,
2044 &read_iso_tasklet
, (unsigned long) bcs
);
2048 static void gigaset_reinitbcshw(struct bc_state
*bcs
)
2050 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
2052 atomic_set(&bcs
->hw
.bas
->running
, 0);
2053 atomic_set(&bcs
->hw
.bas
->corrbytes
, 0);
2054 bcs
->hw
.bas
->numsub
= 0;
2055 spin_lock_init(&ubc
->isooutlock
);
2056 spin_lock_init(&ubc
->isoinlock
);
2057 ubc
->loststatus
= -EINPROGRESS
;
2060 static void gigaset_freecshw(struct cardstate
*cs
)
2062 /* timers, URBs and rcvbuf are disposed of in disconnect */
2067 static int gigaset_initcshw(struct cardstate
*cs
)
2069 struct bas_cardstate
*ucs
;
2071 cs
->hw
.bas
= ucs
= kmalloc(sizeof *ucs
, GFP_KERNEL
);
2075 ucs
->urb_cmd_in
= NULL
;
2076 ucs
->urb_cmd_out
= NULL
;
2078 ucs
->rcvbuf_size
= 0;
2080 spin_lock_init(&ucs
->lock
);
2083 atomic_set(&ucs
->basstate
, 0);
2084 init_timer(&ucs
->timer_ctrl
);
2085 init_timer(&ucs
->timer_atrdy
);
2086 init_timer(&ucs
->timer_cmd_in
);
2092 * unlink and deallocate all URBs unconditionally
2093 * caller must make sure that no commands are still in progress
2095 * cs controller state structure
2097 static void freeurbs(struct cardstate
*cs
)
2099 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
2100 struct bas_bc_state
*ubc
;
2103 for (j
= 0; j
< 2; ++j
) {
2104 ubc
= cs
->bcs
[j
].hw
.bas
;
2105 for (i
= 0; i
< BAS_OUTURBS
; ++i
)
2106 if (ubc
->isoouturbs
[i
].urb
) {
2107 usb_kill_urb(ubc
->isoouturbs
[i
].urb
);
2109 "%s: isoc output URB %d/%d unlinked",
2111 usb_free_urb(ubc
->isoouturbs
[i
].urb
);
2112 ubc
->isoouturbs
[i
].urb
= NULL
;
2114 for (i
= 0; i
< BAS_INURBS
; ++i
)
2115 if (ubc
->isoinurbs
[i
]) {
2116 usb_kill_urb(ubc
->isoinurbs
[i
]);
2118 "%s: isoc input URB %d/%d unlinked",
2120 usb_free_urb(ubc
->isoinurbs
[i
]);
2121 ubc
->isoinurbs
[i
] = NULL
;
2124 if (ucs
->urb_int_in
) {
2125 usb_kill_urb(ucs
->urb_int_in
);
2126 gig_dbg(DEBUG_INIT
, "%s: interrupt input URB unlinked",
2128 usb_free_urb(ucs
->urb_int_in
);
2129 ucs
->urb_int_in
= NULL
;
2131 if (ucs
->urb_cmd_out
) {
2132 usb_kill_urb(ucs
->urb_cmd_out
);
2133 gig_dbg(DEBUG_INIT
, "%s: command output URB unlinked",
2135 usb_free_urb(ucs
->urb_cmd_out
);
2136 ucs
->urb_cmd_out
= NULL
;
2138 if (ucs
->urb_cmd_in
) {
2139 usb_kill_urb(ucs
->urb_cmd_in
);
2140 gig_dbg(DEBUG_INIT
, "%s: command input URB unlinked",
2142 usb_free_urb(ucs
->urb_cmd_in
);
2143 ucs
->urb_cmd_in
= NULL
;
2145 if (ucs
->urb_ctrl
) {
2146 usb_kill_urb(ucs
->urb_ctrl
);
2147 gig_dbg(DEBUG_INIT
, "%s: control output URB unlinked",
2149 usb_free_urb(ucs
->urb_ctrl
);
2150 ucs
->urb_ctrl
= NULL
;
2155 * This function is called when a new USB device is connected.
2156 * It checks whether the new device is handled by this driver.
2158 static int gigaset_probe(struct usb_interface
*interface
,
2159 const struct usb_device_id
*id
)
2161 struct usb_host_interface
*hostif
;
2162 struct usb_device
*udev
= interface_to_usbdev(interface
);
2163 struct cardstate
*cs
= NULL
;
2164 struct bas_cardstate
*ucs
= NULL
;
2165 struct bas_bc_state
*ubc
;
2166 struct usb_endpoint_descriptor
*endpoint
;
2171 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
2172 __func__
, le16_to_cpu(udev
->descriptor
.idVendor
),
2173 le16_to_cpu(udev
->descriptor
.idProduct
));
2175 /* set required alternate setting */
2176 hostif
= interface
->cur_altsetting
;
2177 if (hostif
->desc
.bAlternateSetting
!= 3) {
2179 "%s: wrong alternate setting %d - trying to switch",
2180 __func__
, hostif
->desc
.bAlternateSetting
);
2181 if (usb_set_interface(udev
, hostif
->desc
.bInterfaceNumber
, 3) < 0) {
2182 dev_warn(&udev
->dev
, "usb_set_interface failed, "
2183 "device %d interface %d altsetting %d\n",
2184 udev
->devnum
, hostif
->desc
.bInterfaceNumber
,
2185 hostif
->desc
.bAlternateSetting
);
2188 hostif
= interface
->cur_altsetting
;
2191 /* Reject application specific interfaces
2193 if (hostif
->desc
.bInterfaceClass
!= 255) {
2194 dev_warn(&udev
->dev
, "%s: bInterfaceClass == %d\n",
2195 __func__
, hostif
->desc
.bInterfaceClass
);
2199 dev_info(&udev
->dev
,
2200 "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n",
2201 __func__
, le16_to_cpu(udev
->descriptor
.idVendor
),
2202 le16_to_cpu(udev
->descriptor
.idProduct
));
2204 cs
= gigaset_getunassignedcs(driver
);
2206 dev_err(&udev
->dev
, "no free cardstate\n");
2211 /* save off device structure ptrs for later use */
2214 ucs
->interface
= interface
;
2215 cs
->dev
= &interface
->dev
;
2218 * - one for the interrupt pipe
2219 * - three for the different uses of the default control pipe
2220 * - three for each isochronous pipe
2222 if (!(ucs
->urb_int_in
= usb_alloc_urb(0, SLAB_KERNEL
)) ||
2223 !(ucs
->urb_cmd_in
= usb_alloc_urb(0, SLAB_KERNEL
)) ||
2224 !(ucs
->urb_cmd_out
= usb_alloc_urb(0, SLAB_KERNEL
)) ||
2225 !(ucs
->urb_ctrl
= usb_alloc_urb(0, SLAB_KERNEL
)))
2228 for (j
= 0; j
< 2; ++j
) {
2229 ubc
= cs
->bcs
[j
].hw
.bas
;
2230 for (i
= 0; i
< BAS_OUTURBS
; ++i
)
2231 if (!(ubc
->isoouturbs
[i
].urb
=
2232 usb_alloc_urb(BAS_NUMFRAMES
, SLAB_KERNEL
)))
2234 for (i
= 0; i
< BAS_INURBS
; ++i
)
2235 if (!(ubc
->isoinurbs
[i
] =
2236 usb_alloc_urb(BAS_NUMFRAMES
, SLAB_KERNEL
)))
2241 ucs
->rcvbuf_size
= 0;
2243 /* Fill the interrupt urb and send it to the core */
2244 endpoint
= &hostif
->endpoint
[0].desc
;
2245 usb_fill_int_urb(ucs
->urb_int_in
, udev
,
2246 usb_rcvintpipe(udev
,
2247 (endpoint
->bEndpointAddress
) & 0x0f),
2248 ucs
->int_in_buf
, 3, read_int_callback
, cs
,
2249 endpoint
->bInterval
);
2250 if ((rc
= usb_submit_urb(ucs
->urb_int_in
, SLAB_KERNEL
)) != 0) {
2251 dev_err(cs
->dev
, "could not submit interrupt URB: %s\n",
2256 /* tell the device that the driver is ready */
2257 if ((rc
= req_submit(cs
->bcs
, HD_DEVICE_INIT_ACK
, 0, 0)) != 0)
2260 /* tell common part that the device is ready */
2261 if (startmode
== SM_LOCKED
)
2262 atomic_set(&cs
->mstate
, MS_LOCKED
);
2264 /* save address of controller structure */
2265 usb_set_intfdata(interface
, cs
);
2267 if (!gigaset_start(cs
))
2273 dev_err(cs
->dev
, "could not allocate URBs\n");
2276 usb_set_intfdata(interface
, NULL
);
2277 gigaset_unassign(cs
);
2281 /* gigaset_disconnect
2282 * This function is called when the Gigaset base is unplugged.
2284 static void gigaset_disconnect(struct usb_interface
*interface
)
2286 struct cardstate
*cs
;
2287 struct bas_cardstate
*ucs
;
2290 cs
= usb_get_intfdata(interface
);
2294 dev_info(cs
->dev
, "disconnecting Gigaset base\n");
2296 /* mark base as not ready, all channels disconnected */
2297 atomic_set(&ucs
->basstate
, 0);
2299 /* tell LL all channels are down */
2300 //FIXME shouldn't gigaset_stop() do this?
2301 for (j
= 0; j
< 2; ++j
)
2302 gigaset_bchannel_down(cs
->bcs
+ j
);
2304 /* stop driver (common part) */
2307 /* stop timers and URBs, free ressources */
2308 del_timer_sync(&ucs
->timer_ctrl
);
2309 del_timer_sync(&ucs
->timer_atrdy
);
2310 del_timer_sync(&ucs
->timer_cmd_in
);
2312 usb_set_intfdata(interface
, NULL
);
2315 ucs
->rcvbuf_size
= 0;
2316 usb_put_dev(ucs
->udev
);
2317 ucs
->interface
= NULL
;
2320 gigaset_unassign(cs
);
2323 static struct gigaset_ops gigops
= {
2326 gigaset_chars_in_buffer
,
2328 gigaset_init_bchannel
,
2329 gigaset_close_bchannel
,
2332 gigaset_reinitbcshw
,
2335 gigaset_set_modem_ctrl
,
2337 gigaset_set_line_ctrl
,
2338 gigaset_isoc_send_skb
,
2343 * This function is called after the kernel module is loaded.
2345 static int __init
bas_gigaset_init(void)
2349 /* allocate memory for our driver state and intialize it */
2350 if ((driver
= gigaset_initdriver(GIGASET_MINOR
, GIGASET_MINORS
,
2351 GIGASET_MODULENAME
, GIGASET_DEVNAME
,
2352 GIGASET_DEVFSNAME
, &gigops
,
2353 THIS_MODULE
)) == NULL
)
2356 /* allocate memory for our device state and intialize it */
2357 cardstate
= gigaset_initcs(driver
, 2, 0, 0, cidmode
,
2358 GIGASET_MODULENAME
);
2362 /* register this driver with the USB subsystem */
2363 result
= usb_register(&gigaset_usb_driver
);
2365 err("usb_register failed (error %d)", -result
);
2369 info(DRIVER_AUTHOR
);
2373 error
: if (cardstate
)
2374 gigaset_freecs(cardstate
);
2377 gigaset_freedriver(driver
);
2383 * This function is called before the kernel module is unloaded.
2385 static void __exit
bas_gigaset_exit(void)
2387 struct bas_cardstate
*ucs
= cardstate
->hw
.bas
;
2389 gigaset_blockdriver(driver
); /* => probe will fail
2390 * => no gigaset_start any more
2393 gigaset_shutdown(cardstate
);
2394 /* from now on, no isdn callback should be possible */
2396 /* close all still open channels */
2397 if (atomic_read(&ucs
->basstate
) & BS_B1OPEN
) {
2398 gig_dbg(DEBUG_INIT
, "closing B1 channel");
2399 usb_control_msg(ucs
->udev
, usb_sndctrlpipe(ucs
->udev
, 0),
2400 HD_CLOSE_B1CHANNEL
, OUT_VENDOR_REQ
, 0, 0,
2401 NULL
, 0, BAS_TIMEOUT
);
2403 if (atomic_read(&ucs
->basstate
) & BS_B2OPEN
) {
2404 gig_dbg(DEBUG_INIT
, "closing B2 channel");
2405 usb_control_msg(ucs
->udev
, usb_sndctrlpipe(ucs
->udev
, 0),
2406 HD_CLOSE_B2CHANNEL
, OUT_VENDOR_REQ
, 0, 0,
2407 NULL
, 0, BAS_TIMEOUT
);
2409 if (atomic_read(&ucs
->basstate
) & BS_ATOPEN
) {
2410 gig_dbg(DEBUG_INIT
, "closing AT channel");
2411 usb_control_msg(ucs
->udev
, usb_sndctrlpipe(ucs
->udev
, 0),
2412 HD_CLOSE_ATCHANNEL
, OUT_VENDOR_REQ
, 0, 0,
2413 NULL
, 0, BAS_TIMEOUT
);
2415 atomic_set(&ucs
->basstate
, 0);
2417 /* deregister this driver with the USB subsystem */
2418 usb_deregister(&gigaset_usb_driver
);
2419 /* this will call the disconnect-callback */
2420 /* from now on, no disconnect/probe callback should be running */
2422 gigaset_freecs(cardstate
);
2424 gigaset_freedriver(driver
);
2429 module_init(bas_gigaset_init
);
2430 module_exit(bas_gigaset_exit
);
2432 MODULE_AUTHOR(DRIVER_AUTHOR
);
2433 MODULE_DESCRIPTION(DRIVER_DESC
);
2434 MODULE_LICENSE("GPL");