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_DEVNAME "ttyGB"
46 /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
47 #define IF_WRITEBUF 264
49 /* interrupt pipe message size according to ibid. ch. 2.2 */
52 /* Values for the Gigaset 307x */
53 #define USB_GIGA_VENDOR_ID 0x0681
54 #define USB_3070_PRODUCT_ID 0x0001
55 #define USB_3075_PRODUCT_ID 0x0002
56 #define USB_SX303_PRODUCT_ID 0x0021
57 #define USB_SX353_PRODUCT_ID 0x0022
59 /* table of devices that work with this driver */
60 static const struct usb_device_id gigaset_table
[] = {
61 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_3070_PRODUCT_ID
) },
62 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_3075_PRODUCT_ID
) },
63 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_SX303_PRODUCT_ID
) },
64 { USB_DEVICE(USB_GIGA_VENDOR_ID
, USB_SX353_PRODUCT_ID
) },
65 { } /* Terminating entry */
68 MODULE_DEVICE_TABLE(usb
, gigaset_table
);
70 /*======================= local function prototypes ==========================*/
72 /* function called if a new device belonging to this driver is connected */
73 static int gigaset_probe(struct usb_interface
*interface
,
74 const struct usb_device_id
*id
);
76 /* Function will be called if the device is unplugged */
77 static void gigaset_disconnect(struct usb_interface
*interface
);
79 /* functions called before/after suspend */
80 static int gigaset_suspend(struct usb_interface
*intf
, pm_message_t message
);
81 static int gigaset_resume(struct usb_interface
*intf
);
83 /* functions called before/after device reset */
84 static int gigaset_pre_reset(struct usb_interface
*intf
);
85 static int gigaset_post_reset(struct usb_interface
*intf
);
87 static int atread_submit(struct cardstate
*, int);
88 static void stopurbs(struct bas_bc_state
*);
89 static int req_submit(struct bc_state
*, int, int, int);
90 static int atwrite_submit(struct cardstate
*, unsigned char *, int);
91 static int start_cbsend(struct cardstate
*);
93 /*============================================================================*/
95 struct bas_cardstate
{
96 struct usb_device
*udev
; /* USB device pointer */
97 struct usb_interface
*interface
; /* interface for this device */
98 unsigned char minor
; /* starting minor number */
100 struct urb
*urb_ctrl
; /* control pipe default URB */
101 struct usb_ctrlrequest dr_ctrl
;
102 struct timer_list timer_ctrl
; /* control request timeout */
105 struct timer_list timer_atrdy
; /* AT command ready timeout */
106 struct urb
*urb_cmd_out
; /* for sending AT commands */
107 struct usb_ctrlrequest dr_cmd_out
;
110 struct urb
*urb_cmd_in
; /* for receiving AT replies */
111 struct usb_ctrlrequest dr_cmd_in
;
112 struct timer_list timer_cmd_in
; /* receive request timeout */
113 unsigned char *rcvbuf
; /* AT reply receive buffer */
115 struct urb
*urb_int_in
; /* URB for interrupt pipe */
116 unsigned char *int_in_buf
;
118 spinlock_t lock
; /* locks all following */
119 int basstate
; /* bitmap (BS_*) */
120 int pending
; /* uncompleted base request */
121 wait_queue_head_t waitqueue
;
122 int rcvbuf_size
; /* size of AT receive buffer */
123 /* 0: no receive in progress */
124 int retry_cmd_in
; /* receive req retry count */
127 /* status of direct USB connection to 307x base (bits in basstate) */
128 #define BS_ATOPEN 0x001 /* AT channel open */
129 #define BS_B1OPEN 0x002 /* B channel 1 open */
130 #define BS_B2OPEN 0x004 /* B channel 2 open */
131 #define BS_ATREADY 0x008 /* base ready for AT command */
132 #define BS_INIT 0x010 /* base has signalled INIT_OK */
133 #define BS_ATTIMER 0x020 /* waiting for HD_READY_SEND_ATDATA */
134 #define BS_ATRDPEND 0x040 /* urb_cmd_in in use */
135 #define BS_ATWRPEND 0x080 /* urb_cmd_out in use */
136 #define BS_SUSPEND 0x100 /* USB port suspended */
137 #define BS_RESETTING 0x200 /* waiting for HD_RESET_INTERRUPT_PIPE_ACK */
140 static struct gigaset_driver
*driver
;
142 /* usb specific object needed to register this driver with the usb subsystem */
143 static struct usb_driver gigaset_usb_driver
= {
144 .name
= GIGASET_MODULENAME
,
145 .probe
= gigaset_probe
,
146 .disconnect
= gigaset_disconnect
,
147 .id_table
= gigaset_table
,
148 .suspend
= gigaset_suspend
,
149 .resume
= gigaset_resume
,
150 .reset_resume
= gigaset_post_reset
,
151 .pre_reset
= gigaset_pre_reset
,
152 .post_reset
= gigaset_post_reset
,
155 /* get message text for usb_submit_urb return code
157 static char *get_usb_rcmsg(int rc
)
159 static char unkmsg
[28];
165 return "out of memory";
167 return "device not present";
169 return "endpoint not present";
171 return "URB type not supported";
173 return "invalid argument";
175 return "start frame too early or too much scheduled";
177 return "too many isochronous frames requested";
179 return "endpoint stalled";
181 return "invalid packet size";
183 return "would overcommit USB bandwidth";
185 return "device shut down";
187 return "reject flag set";
189 return "device suspended";
191 snprintf(unkmsg
, sizeof(unkmsg
), "unknown error %d", rc
);
196 /* get message text for USB status code
198 static char *get_usb_statmsg(int status
)
200 static char unkmsg
[28];
206 return "unlinked (sync)";
210 return "bit stuffing error, timeout, or unknown USB error";
212 return "CRC mismatch, timeout, or unknown USB error";
216 return "endpoint stalled";
218 return "IN buffer overrun";
220 return "OUT buffer underrun";
222 return "too much data";
224 return "short packet detected";
226 return "device removed";
228 return "partial isochronous transfer";
230 return "invalid argument";
232 return "unlinked (async)";
234 return "device shut down";
236 snprintf(unkmsg
, sizeof(unkmsg
), "unknown status %d", status
);
242 * retrieve string representation of USB pipe type
244 static inline char *usb_pipetype_str(int pipe
)
246 if (usb_pipeisoc(pipe
))
248 if (usb_pipeint(pipe
))
250 if (usb_pipecontrol(pipe
))
252 if (usb_pipebulk(pipe
))
258 * write content of URB to syslog for debugging
260 static inline void dump_urb(enum debuglevel level
, const char *tag
,
263 #ifdef CONFIG_GIGASET_DEBUG
265 gig_dbg(level
, "%s urb(0x%08lx)->{", tag
, (unsigned long) urb
);
268 " dev=0x%08lx, pipe=%s:EP%d/DV%d:%s, "
269 "hcpriv=0x%08lx, transfer_flags=0x%x,",
270 (unsigned long) urb
->dev
,
271 usb_pipetype_str(urb
->pipe
),
272 usb_pipeendpoint(urb
->pipe
), usb_pipedevice(urb
->pipe
),
273 usb_pipein(urb
->pipe
) ? "in" : "out",
274 (unsigned long) urb
->hcpriv
,
275 urb
->transfer_flags
);
277 " transfer_buffer=0x%08lx[%d], actual_length=%d, "
278 "setup_packet=0x%08lx,",
279 (unsigned long) urb
->transfer_buffer
,
280 urb
->transfer_buffer_length
, urb
->actual_length
,
281 (unsigned long) urb
->setup_packet
);
283 " start_frame=%d, number_of_packets=%d, interval=%d, "
285 urb
->start_frame
, urb
->number_of_packets
, urb
->interval
,
288 " context=0x%08lx, complete=0x%08lx, "
289 "iso_frame_desc[]={",
290 (unsigned long) urb
->context
,
291 (unsigned long) urb
->complete
);
292 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
293 struct usb_iso_packet_descriptor
*pifd
294 = &urb
->iso_frame_desc
[i
];
296 " {offset=%u, length=%u, actual_length=%u, "
298 pifd
->offset
, pifd
->length
, pifd
->actual_length
,
302 gig_dbg(level
, "}}");
306 /* read/set modem control bits etc. (m10x only) */
307 static int gigaset_set_modem_ctrl(struct cardstate
*cs
, unsigned old_state
,
313 static int gigaset_baud_rate(struct cardstate
*cs
, unsigned cflag
)
318 static int gigaset_set_line_ctrl(struct cardstate
*cs
, unsigned cflag
)
323 /* set/clear bits in base connection state, return previous state
325 static inline int update_basstate(struct bas_cardstate
*ucs
,
331 spin_lock_irqsave(&ucs
->lock
, flags
);
332 state
= ucs
->basstate
;
333 ucs
->basstate
= (state
& ~clear
) | set
;
334 spin_unlock_irqrestore(&ucs
->lock
, flags
);
339 * hang up any existing connection because of an unrecoverable error
340 * This function may be called from any context and takes care of scheduling
341 * the necessary actions for execution outside of interrupt context.
342 * cs->lock must not be held.
344 * B channel control structure
346 static inline void error_hangup(struct bc_state
*bcs
)
348 struct cardstate
*cs
= bcs
->cs
;
350 gig_dbg(DEBUG_ANY
, "%s: scheduling HUP for channel %d",
351 __func__
, bcs
->channel
);
353 if (!gigaset_add_event(cs
, &bcs
->at_state
, EV_HUP
, NULL
, 0, NULL
))
354 dev_err(cs
->dev
, "event queue full\n");
356 gigaset_schedule_event(cs
);
360 * reset Gigaset device because of an unrecoverable error
361 * This function may be called from any context, and takes care of
362 * scheduling the necessary actions for execution outside of interrupt context.
363 * cs->lock must not be held.
365 * controller state structure
367 static inline void error_reset(struct cardstate
*cs
)
369 /* reset interrupt pipe to recover (ignore errors) */
370 update_basstate(cs
->hw
.bas
, BS_RESETTING
, 0);
371 req_submit(cs
->bcs
, HD_RESET_INTERRUPT_PIPE
, 0, BAS_TIMEOUT
);
375 * check for completion of pending control request
377 * ucs hardware specific controller state structure
379 static void check_pending(struct bas_cardstate
*ucs
)
383 spin_lock_irqsave(&ucs
->lock
, flags
);
384 switch (ucs
->pending
) {
387 case HD_OPEN_ATCHANNEL
:
388 if (ucs
->basstate
& BS_ATOPEN
)
391 case HD_OPEN_B1CHANNEL
:
392 if (ucs
->basstate
& BS_B1OPEN
)
395 case HD_OPEN_B2CHANNEL
:
396 if (ucs
->basstate
& BS_B2OPEN
)
399 case HD_CLOSE_ATCHANNEL
:
400 if (!(ucs
->basstate
& BS_ATOPEN
))
403 case HD_CLOSE_B1CHANNEL
:
404 if (!(ucs
->basstate
& BS_B1OPEN
))
407 case HD_CLOSE_B2CHANNEL
:
408 if (!(ucs
->basstate
& BS_B2OPEN
))
411 case HD_DEVICE_INIT_ACK
: /* no reply expected */
414 case HD_RESET_INTERRUPT_PIPE
:
415 if (!(ucs
->basstate
& BS_RESETTING
))
419 * HD_READ_ATMESSAGE and HD_WRITE_ATMESSAGE are handled separately
420 * and should never end up here
423 dev_warn(&ucs
->interface
->dev
,
424 "unknown pending request 0x%02x cleared\n",
430 del_timer(&ucs
->timer_ctrl
);
432 spin_unlock_irqrestore(&ucs
->lock
, flags
);
436 * timeout routine for command input request
438 * controller state structure
440 static void cmd_in_timeout(unsigned long data
)
442 struct cardstate
*cs
= (struct cardstate
*) data
;
443 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
446 if (!ucs
->rcvbuf_size
) {
447 gig_dbg(DEBUG_USBREQ
, "%s: no receive in progress", __func__
);
451 if (ucs
->retry_cmd_in
++ < BAS_RETRY
) {
452 dev_notice(cs
->dev
, "control read: timeout, retry %d\n",
454 rc
= atread_submit(cs
, BAS_TIMEOUT
);
455 if (rc
>= 0 || rc
== -ENODEV
)
456 /* resubmitted or disconnected */
457 /* - bypass regular exit block */
461 "control read: timeout, giving up after %d tries\n",
466 ucs
->rcvbuf_size
= 0;
470 /* read_ctrl_callback
471 * USB completion handler for control pipe input
472 * called by the USB subsystem in interrupt context
474 * urb USB request block
475 * urb->context = inbuf structure for controller state
477 static void read_ctrl_callback(struct urb
*urb
)
479 struct inbuf_t
*inbuf
= urb
->context
;
480 struct cardstate
*cs
= inbuf
->cs
;
481 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
482 int status
= urb
->status
;
487 update_basstate(ucs
, 0, BS_ATRDPEND
);
488 wake_up(&ucs
->waitqueue
);
490 if (!ucs
->rcvbuf_size
) {
491 dev_warn(cs
->dev
, "%s: no receive in progress\n", __func__
);
495 del_timer(&ucs
->timer_cmd_in
);
498 case 0: /* normal completion */
499 numbytes
= urb
->actual_length
;
500 if (unlikely(numbytes
!= ucs
->rcvbuf_size
)) {
502 "control read: received %d chars, expected %d\n",
503 numbytes
, ucs
->rcvbuf_size
);
504 if (numbytes
> ucs
->rcvbuf_size
)
505 numbytes
= ucs
->rcvbuf_size
;
508 /* copy received bytes to inbuf */
509 have_data
= gigaset_fill_inbuf(inbuf
, ucs
->rcvbuf
, numbytes
);
511 if (unlikely(numbytes
< ucs
->rcvbuf_size
)) {
512 /* incomplete - resubmit for remaining bytes */
513 ucs
->rcvbuf_size
-= numbytes
;
514 ucs
->retry_cmd_in
= 0;
515 rc
= atread_submit(cs
, BAS_TIMEOUT
);
516 if (rc
>= 0 || rc
== -ENODEV
)
517 /* resubmitted or disconnected */
518 /* - bypass regular exit block */
524 case -ENOENT
: /* cancelled */
525 case -ECONNRESET
: /* cancelled (async) */
526 case -EINPROGRESS
: /* pending */
527 case -ENODEV
: /* device removed */
528 case -ESHUTDOWN
: /* device shut down */
529 /* no action necessary */
530 gig_dbg(DEBUG_USBREQ
, "%s: %s",
531 __func__
, get_usb_statmsg(status
));
534 default: /* severe trouble */
535 dev_warn(cs
->dev
, "control read: %s\n",
536 get_usb_statmsg(status
));
537 if (ucs
->retry_cmd_in
++ < BAS_RETRY
) {
538 dev_notice(cs
->dev
, "control read: retry %d\n",
540 rc
= atread_submit(cs
, BAS_TIMEOUT
);
541 if (rc
>= 0 || rc
== -ENODEV
)
542 /* resubmitted or disconnected */
543 /* - bypass regular exit block */
547 "control read: giving up after %d tries\n",
555 ucs
->rcvbuf_size
= 0;
557 gig_dbg(DEBUG_INTR
, "%s-->BH", __func__
);
558 gigaset_schedule_event(cs
);
563 * submit an HD_READ_ATMESSAGE command URB and optionally start a timeout
565 * cs controller state structure
566 * timeout timeout in 1/10 sec., 0: none
569 * -EBUSY if another request is pending
570 * any URB submission error code
572 static int atread_submit(struct cardstate
*cs
, int timeout
)
574 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
578 gig_dbg(DEBUG_USBREQ
, "-------> HD_READ_ATMESSAGE (%d)",
581 basstate
= update_basstate(ucs
, BS_ATRDPEND
, 0);
582 if (basstate
& BS_ATRDPEND
) {
584 "could not submit HD_READ_ATMESSAGE: URB busy\n");
588 if (basstate
& BS_SUSPEND
) {
590 "HD_READ_ATMESSAGE not submitted, "
591 "suspend in progress\n");
592 update_basstate(ucs
, 0, BS_ATRDPEND
);
593 /* treat like disconnect */
597 ucs
->dr_cmd_in
.bRequestType
= IN_VENDOR_REQ
;
598 ucs
->dr_cmd_in
.bRequest
= HD_READ_ATMESSAGE
;
599 ucs
->dr_cmd_in
.wValue
= 0;
600 ucs
->dr_cmd_in
.wIndex
= 0;
601 ucs
->dr_cmd_in
.wLength
= cpu_to_le16(ucs
->rcvbuf_size
);
602 usb_fill_control_urb(ucs
->urb_cmd_in
, ucs
->udev
,
603 usb_rcvctrlpipe(ucs
->udev
, 0),
604 (unsigned char *) &ucs
->dr_cmd_in
,
605 ucs
->rcvbuf
, ucs
->rcvbuf_size
,
606 read_ctrl_callback
, cs
->inbuf
);
608 ret
= usb_submit_urb(ucs
->urb_cmd_in
, GFP_ATOMIC
);
610 update_basstate(ucs
, 0, BS_ATRDPEND
);
611 dev_err(cs
->dev
, "could not submit HD_READ_ATMESSAGE: %s\n",
617 gig_dbg(DEBUG_USBREQ
, "setting timeout of %d/10 secs", timeout
);
618 ucs
->timer_cmd_in
.expires
= jiffies
+ timeout
* HZ
/ 10;
619 ucs
->timer_cmd_in
.data
= (unsigned long) cs
;
620 ucs
->timer_cmd_in
.function
= cmd_in_timeout
;
621 add_timer(&ucs
->timer_cmd_in
);
627 * USB completion handler for interrupt pipe input
628 * called by the USB subsystem in interrupt context
630 * urb USB request block
631 * urb->context = controller state structure
633 static void read_int_callback(struct urb
*urb
)
635 struct cardstate
*cs
= urb
->context
;
636 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
637 struct bc_state
*bcs
;
638 int status
= urb
->status
;
645 case 0: /* success */
647 case -ENOENT
: /* cancelled */
648 case -ECONNRESET
: /* cancelled (async) */
649 case -EINPROGRESS
: /* pending */
650 /* ignore silently */
651 gig_dbg(DEBUG_USBREQ
, "%s: %s",
652 __func__
, get_usb_statmsg(status
));
654 case -ENODEV
: /* device removed */
655 case -ESHUTDOWN
: /* device shut down */
656 gig_dbg(DEBUG_USBREQ
, "%s: device disconnected", __func__
);
658 default: /* severe trouble */
659 dev_warn(cs
->dev
, "interrupt read: %s\n",
660 get_usb_statmsg(status
));
664 /* drop incomplete packets even if the missing bytes wouldn't matter */
665 if (unlikely(urb
->actual_length
< IP_MSGSIZE
)) {
666 dev_warn(cs
->dev
, "incomplete interrupt packet (%d bytes)\n",
671 l
= (unsigned) ucs
->int_in_buf
[1] +
672 (((unsigned) ucs
->int_in_buf
[2]) << 8);
674 gig_dbg(DEBUG_USBREQ
, "<-------%d: 0x%02x (%u [0x%02x 0x%02x])",
675 urb
->actual_length
, (int)ucs
->int_in_buf
[0], l
,
676 (int)ucs
->int_in_buf
[1], (int)ucs
->int_in_buf
[2]);
680 switch (ucs
->int_in_buf
[0]) {
681 case HD_DEVICE_INIT_OK
:
682 update_basstate(ucs
, BS_INIT
, 0);
685 case HD_READY_SEND_ATDATA
:
686 del_timer(&ucs
->timer_atrdy
);
687 update_basstate(ucs
, BS_ATREADY
, BS_ATTIMER
);
691 case HD_OPEN_B2CHANNEL_ACK
:
693 case HD_OPEN_B1CHANNEL_ACK
:
694 bcs
= cs
->bcs
+ channel
;
695 update_basstate(ucs
, BS_B1OPEN
<< channel
, 0);
696 gigaset_bchannel_up(bcs
);
699 case HD_OPEN_ATCHANNEL_ACK
:
700 update_basstate(ucs
, BS_ATOPEN
, 0);
704 case HD_CLOSE_B2CHANNEL_ACK
:
706 case HD_CLOSE_B1CHANNEL_ACK
:
707 bcs
= cs
->bcs
+ channel
;
708 update_basstate(ucs
, 0, BS_B1OPEN
<< channel
);
709 stopurbs(bcs
->hw
.bas
);
710 gigaset_bchannel_down(bcs
);
713 case HD_CLOSE_ATCHANNEL_ACK
:
714 update_basstate(ucs
, 0, BS_ATOPEN
);
717 case HD_B2_FLOW_CONTROL
:
719 case HD_B1_FLOW_CONTROL
:
720 bcs
= cs
->bcs
+ channel
;
721 atomic_add((l
- BAS_NORMFRAME
) * BAS_CORRFRAMES
,
722 &bcs
->hw
.bas
->corrbytes
);
724 "Flow control (channel %d, sub %d): 0x%02x => %d",
725 channel
, bcs
->hw
.bas
->numsub
, l
,
726 atomic_read(&bcs
->hw
.bas
->corrbytes
));
729 case HD_RECEIVEATDATA_ACK
: /* AT response ready to be received */
732 "HD_RECEIVEATDATA_ACK with length 0 ignored\n");
735 spin_lock_irqsave(&cs
->lock
, flags
);
736 if (ucs
->rcvbuf_size
) {
737 /* throw away previous buffer - we have no queue */
739 "receive AT data overrun, %d bytes lost\n",
742 ucs
->rcvbuf_size
= 0;
744 ucs
->rcvbuf
= kmalloc(l
, GFP_ATOMIC
);
745 if (ucs
->rcvbuf
== NULL
) {
746 spin_unlock_irqrestore(&cs
->lock
, flags
);
747 dev_err(cs
->dev
, "out of memory receiving AT data\n");
751 ucs
->rcvbuf_size
= l
;
752 ucs
->retry_cmd_in
= 0;
753 rc
= atread_submit(cs
, BAS_TIMEOUT
);
757 ucs
->rcvbuf_size
= 0;
759 spin_unlock_irqrestore(&cs
->lock
, flags
);
764 spin_unlock_irqrestore(&cs
->lock
, flags
);
767 case HD_RESET_INTERRUPT_PIPE_ACK
:
768 update_basstate(ucs
, 0, BS_RESETTING
);
769 dev_notice(cs
->dev
, "interrupt pipe reset\n");
773 gig_dbg(DEBUG_USBREQ
, "HD_SUSPEND_END");
778 "unknown Gigaset signal 0x%02x (%u) ignored\n",
779 (int) ucs
->int_in_buf
[0], l
);
783 wake_up(&ucs
->waitqueue
);
786 rc
= usb_submit_urb(urb
, GFP_ATOMIC
);
787 if (unlikely(rc
!= 0 && rc
!= -ENODEV
)) {
788 dev_err(cs
->dev
, "could not resubmit interrupt URB: %s\n",
795 * USB completion handler for B channel isochronous input
796 * called by the USB subsystem in interrupt context
798 * urb USB request block of completed request
799 * urb->context = bc_state structure
801 static void read_iso_callback(struct urb
*urb
)
803 struct bc_state
*bcs
;
804 struct bas_bc_state
*ubc
;
805 int status
= urb
->status
;
809 /* status codes not worth bothering the tasklet with */
810 if (unlikely(status
== -ENOENT
||
811 status
== -ECONNRESET
||
812 status
== -EINPROGRESS
||
814 status
== -ESHUTDOWN
)) {
815 gig_dbg(DEBUG_ISO
, "%s: %s",
816 __func__
, get_usb_statmsg(status
));
823 spin_lock_irqsave(&ubc
->isoinlock
, flags
);
824 if (likely(ubc
->isoindone
== NULL
)) {
825 /* pass URB to tasklet */
826 ubc
->isoindone
= urb
;
827 ubc
->isoinstatus
= status
;
828 tasklet_hi_schedule(&ubc
->rcvd_tasklet
);
830 /* tasklet still busy, drop data and resubmit URB */
831 ubc
->loststatus
= status
;
832 for (i
= 0; i
< BAS_NUMFRAMES
; i
++) {
833 ubc
->isoinlost
+= urb
->iso_frame_desc
[i
].actual_length
;
834 if (unlikely(urb
->iso_frame_desc
[i
].status
!= 0 &&
835 urb
->iso_frame_desc
[i
].status
!=
837 ubc
->loststatus
= urb
->iso_frame_desc
[i
].status
;
838 urb
->iso_frame_desc
[i
].status
= 0;
839 urb
->iso_frame_desc
[i
].actual_length
= 0;
841 if (likely(ubc
->running
)) {
842 /* urb->dev is clobbered by USB subsystem */
843 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
844 urb
->transfer_flags
= URB_ISO_ASAP
;
845 urb
->number_of_packets
= BAS_NUMFRAMES
;
846 gig_dbg(DEBUG_ISO
, "%s: isoc read overrun/resubmit",
848 rc
= usb_submit_urb(urb
, GFP_ATOMIC
);
849 if (unlikely(rc
!= 0 && rc
!= -ENODEV
)) {
850 dev_err(bcs
->cs
->dev
,
851 "could not resubmit isochronous read "
852 "URB: %s\n", get_usb_rcmsg(rc
));
853 dump_urb(DEBUG_ISO
, "isoc read", urb
);
858 spin_unlock_irqrestore(&ubc
->isoinlock
, flags
);
861 /* write_iso_callback
862 * USB completion handler for B channel isochronous output
863 * called by the USB subsystem in interrupt context
865 * urb USB request block of completed request
866 * urb->context = isow_urbctx_t structure
868 static void write_iso_callback(struct urb
*urb
)
870 struct isow_urbctx_t
*ucx
;
871 struct bas_bc_state
*ubc
;
872 int status
= urb
->status
;
875 /* status codes not worth bothering the tasklet with */
876 if (unlikely(status
== -ENOENT
||
877 status
== -ECONNRESET
||
878 status
== -EINPROGRESS
||
880 status
== -ESHUTDOWN
)) {
881 gig_dbg(DEBUG_ISO
, "%s: %s",
882 __func__
, get_usb_statmsg(status
));
886 /* pass URB context to tasklet */
888 ubc
= ucx
->bcs
->hw
.bas
;
889 ucx
->status
= status
;
891 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
892 ubc
->isooutovfl
= ubc
->isooutdone
;
893 ubc
->isooutdone
= ucx
;
894 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
895 tasklet_hi_schedule(&ubc
->sent_tasklet
);
899 * prepare and submit USB request blocks for isochronous input and output
901 * B channel control structure
904 * < 0 on error (no URBs submitted)
906 static int starturbs(struct bc_state
*bcs
)
908 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
913 /* initialize L2 reception */
914 if (bcs
->proto2
== L2_HDLC
)
915 bcs
->inputstate
|= INS_flag_hunt
;
917 /* submit all isochronous input URBs */
919 for (k
= 0; k
< BAS_INURBS
; k
++) {
920 urb
= ubc
->isoinurbs
[k
];
926 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
927 urb
->pipe
= usb_rcvisocpipe(urb
->dev
, 3 + 2 * bcs
->channel
);
928 urb
->transfer_flags
= URB_ISO_ASAP
;
929 urb
->transfer_buffer
= ubc
->isoinbuf
+ k
* BAS_INBUFSIZE
;
930 urb
->transfer_buffer_length
= BAS_INBUFSIZE
;
931 urb
->number_of_packets
= BAS_NUMFRAMES
;
932 urb
->interval
= BAS_FRAMETIME
;
933 urb
->complete
= read_iso_callback
;
935 for (j
= 0; j
< BAS_NUMFRAMES
; j
++) {
936 urb
->iso_frame_desc
[j
].offset
= j
* BAS_MAXFRAME
;
937 urb
->iso_frame_desc
[j
].length
= BAS_MAXFRAME
;
938 urb
->iso_frame_desc
[j
].status
= 0;
939 urb
->iso_frame_desc
[j
].actual_length
= 0;
942 dump_urb(DEBUG_ISO
, "Initial isoc read", urb
);
943 rc
= usb_submit_urb(urb
, GFP_ATOMIC
);
948 /* initialize L2 transmission */
949 gigaset_isowbuf_init(ubc
->isooutbuf
, PPP_FLAG
);
951 /* set up isochronous output URBs for flag idling */
952 for (k
= 0; k
< BAS_OUTURBS
; ++k
) {
953 urb
= ubc
->isoouturbs
[k
].urb
;
958 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
959 urb
->pipe
= usb_sndisocpipe(urb
->dev
, 4 + 2 * bcs
->channel
);
960 urb
->transfer_flags
= URB_ISO_ASAP
;
961 urb
->transfer_buffer
= ubc
->isooutbuf
->data
;
962 urb
->transfer_buffer_length
= sizeof(ubc
->isooutbuf
->data
);
963 urb
->number_of_packets
= BAS_NUMFRAMES
;
964 urb
->interval
= BAS_FRAMETIME
;
965 urb
->complete
= write_iso_callback
;
966 urb
->context
= &ubc
->isoouturbs
[k
];
967 for (j
= 0; j
< BAS_NUMFRAMES
; ++j
) {
968 urb
->iso_frame_desc
[j
].offset
= BAS_OUTBUFSIZE
;
969 urb
->iso_frame_desc
[j
].length
= BAS_NORMFRAME
;
970 urb
->iso_frame_desc
[j
].status
= 0;
971 urb
->iso_frame_desc
[j
].actual_length
= 0;
973 ubc
->isoouturbs
[k
].limit
= -1;
976 /* keep one URB free, submit the others */
977 for (k
= 0; k
< BAS_OUTURBS
-1; ++k
) {
978 dump_urb(DEBUG_ISO
, "Initial isoc write", urb
);
979 rc
= usb_submit_urb(ubc
->isoouturbs
[k
].urb
, GFP_ATOMIC
);
983 dump_urb(DEBUG_ISO
, "Initial isoc write (free)", urb
);
984 ubc
->isooutfree
= &ubc
->isoouturbs
[BAS_OUTURBS
-1];
985 ubc
->isooutdone
= ubc
->isooutovfl
= NULL
;
993 * cancel the USB request blocks for isochronous input and output
994 * errors are silently ignored
996 * B channel control structure
998 static void stopurbs(struct bas_bc_state
*ubc
)
1004 for (k
= 0; k
< BAS_INURBS
; ++k
) {
1005 rc
= usb_unlink_urb(ubc
->isoinurbs
[k
]);
1007 "%s: isoc input URB %d unlinked, result = %s",
1008 __func__
, k
, get_usb_rcmsg(rc
));
1011 for (k
= 0; k
< BAS_OUTURBS
; ++k
) {
1012 rc
= usb_unlink_urb(ubc
->isoouturbs
[k
].urb
);
1014 "%s: isoc output URB %d unlinked, result = %s",
1015 __func__
, k
, get_usb_rcmsg(rc
));
1019 /* Isochronous Write - Bottom Half */
1020 /* =============================== */
1022 /* submit_iso_write_urb
1023 * fill and submit the next isochronous write URB
1025 * ucx context structure containing URB
1027 * number of frames submitted in URB
1028 * 0 if URB not submitted because no data available (isooutbuf busy)
1029 * error code < 0 on error
1031 static int submit_iso_write_urb(struct isow_urbctx_t
*ucx
)
1033 struct urb
*urb
= ucx
->urb
;
1034 struct bas_bc_state
*ubc
= ucx
->bcs
->hw
.bas
;
1035 struct usb_iso_packet_descriptor
*ifd
;
1036 int corrbytes
, nframe
, rc
;
1038 /* urb->dev is clobbered by USB subsystem */
1039 urb
->dev
= ucx
->bcs
->cs
->hw
.bas
->udev
;
1040 urb
->transfer_flags
= URB_ISO_ASAP
;
1041 urb
->transfer_buffer
= ubc
->isooutbuf
->data
;
1042 urb
->transfer_buffer_length
= sizeof(ubc
->isooutbuf
->data
);
1044 for (nframe
= 0; nframe
< BAS_NUMFRAMES
; nframe
++) {
1045 ifd
= &urb
->iso_frame_desc
[nframe
];
1047 /* compute frame length according to flow control */
1048 ifd
->length
= BAS_NORMFRAME
;
1049 corrbytes
= atomic_read(&ubc
->corrbytes
);
1050 if (corrbytes
!= 0) {
1051 gig_dbg(DEBUG_ISO
, "%s: corrbytes=%d",
1052 __func__
, corrbytes
);
1053 if (corrbytes
> BAS_HIGHFRAME
- BAS_NORMFRAME
)
1054 corrbytes
= BAS_HIGHFRAME
- BAS_NORMFRAME
;
1055 else if (corrbytes
< BAS_LOWFRAME
- BAS_NORMFRAME
)
1056 corrbytes
= BAS_LOWFRAME
- BAS_NORMFRAME
;
1057 ifd
->length
+= corrbytes
;
1058 atomic_add(-corrbytes
, &ubc
->corrbytes
);
1061 /* retrieve block of data to send */
1062 rc
= gigaset_isowbuf_getbytes(ubc
->isooutbuf
, ifd
->length
);
1066 "%s: buffer busy at frame %d",
1068 /* tasklet will be restarted from
1069 gigaset_isoc_send_skb() */
1071 dev_err(ucx
->bcs
->cs
->dev
,
1072 "%s: buffer error %d at frame %d\n",
1073 __func__
, rc
, nframe
);
1079 ucx
->limit
= ubc
->isooutbuf
->nextread
;
1081 ifd
->actual_length
= 0;
1083 if (unlikely(nframe
== 0))
1084 return 0; /* no data to send */
1085 urb
->number_of_packets
= nframe
;
1087 rc
= usb_submit_urb(urb
, GFP_ATOMIC
);
1090 /* device removed - give up silently */
1091 gig_dbg(DEBUG_ISO
, "%s: disconnected", __func__
);
1093 dev_err(ucx
->bcs
->cs
->dev
,
1094 "could not submit isochronous write URB: %s\n",
1102 /* write_iso_tasklet
1103 * tasklet scheduled when an isochronous output URB from the Gigaset device
1106 * data B channel state structure
1108 static void write_iso_tasklet(unsigned long data
)
1110 struct bc_state
*bcs
= (struct bc_state
*) data
;
1111 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
1112 struct cardstate
*cs
= bcs
->cs
;
1113 struct isow_urbctx_t
*done
, *next
, *ovfl
;
1116 struct usb_iso_packet_descriptor
*ifd
;
1118 unsigned long flags
;
1120 struct sk_buff
*skb
;
1124 /* loop while completed URBs arrive in time */
1126 if (unlikely(!(ubc
->running
))) {
1127 gig_dbg(DEBUG_ISO
, "%s: not running", __func__
);
1131 /* retrieve completed URBs */
1132 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1133 done
= ubc
->isooutdone
;
1134 ubc
->isooutdone
= NULL
;
1135 ovfl
= ubc
->isooutovfl
;
1136 ubc
->isooutovfl
= NULL
;
1137 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1139 dev_err(cs
->dev
, "isochronous write buffer underrun\n");
1146 /* submit free URB if available */
1147 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1148 next
= ubc
->isooutfree
;
1149 ubc
->isooutfree
= NULL
;
1150 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1152 rc
= submit_iso_write_urb(next
);
1153 if (unlikely(rc
<= 0 && rc
!= -ENODEV
)) {
1154 /* could not submit URB, put it back */
1155 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1156 if (ubc
->isooutfree
== NULL
) {
1157 ubc
->isooutfree
= next
;
1160 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1162 /* couldn't put it back */
1164 "losing isochronous write URB\n");
1170 /* process completed URB */
1172 status
= done
->status
;
1174 case -EXDEV
: /* partial completion */
1175 gig_dbg(DEBUG_ISO
, "%s: URB partially completed",
1177 /* fall through - what's the difference anyway? */
1178 case 0: /* normal completion */
1179 /* inspect individual frames
1180 * assumptions (for lack of documentation):
1181 * - actual_length bytes of first frame in error are
1183 * - all following frames are not sent at all
1185 offset
= done
->limit
; /* default (no error) */
1186 for (i
= 0; i
< BAS_NUMFRAMES
; i
++) {
1187 ifd
= &urb
->iso_frame_desc
[i
];
1189 ifd
->actual_length
!= ifd
->length
) {
1191 "isochronous write: frame %d: %s, "
1192 "only %d of %d bytes sent\n",
1193 i
, get_usb_statmsg(ifd
->status
),
1194 ifd
->actual_length
, ifd
->length
);
1195 offset
= (ifd
->offset
+
1201 #ifdef CONFIG_GIGASET_DEBUG
1202 /* check assumption on remaining frames */
1203 for (; i
< BAS_NUMFRAMES
; i
++) {
1204 ifd
= &urb
->iso_frame_desc
[i
];
1205 if (ifd
->status
!= -EINPROGRESS
1206 || ifd
->actual_length
!= 0) {
1208 "isochronous write: frame %d: %s, "
1209 "%d of %d bytes sent\n",
1210 i
, get_usb_statmsg(ifd
->status
),
1211 ifd
->actual_length
, ifd
->length
);
1212 offset
= (ifd
->offset
+
1220 case -EPIPE
: /* stall - probably underrun */
1221 dev_err(cs
->dev
, "isochronous write stalled\n");
1224 default: /* severe trouble */
1225 dev_warn(cs
->dev
, "isochronous write: %s\n",
1226 get_usb_statmsg(status
));
1229 /* mark the write buffer area covered by this URB as free */
1230 if (done
->limit
>= 0)
1231 ubc
->isooutbuf
->read
= done
->limit
;
1233 /* mark URB as free */
1234 spin_lock_irqsave(&ubc
->isooutlock
, flags
);
1235 next
= ubc
->isooutfree
;
1236 ubc
->isooutfree
= done
;
1237 spin_unlock_irqrestore(&ubc
->isooutlock
, flags
);
1239 /* only one URB still active - resubmit one */
1240 rc
= submit_iso_write_urb(next
);
1241 if (unlikely(rc
<= 0 && rc
!= -ENODEV
)) {
1242 /* couldn't submit */
1248 /* process queued SKBs */
1249 while ((skb
= skb_dequeue(&bcs
->squeue
))) {
1250 /* copy to output buffer, doing L2 encapsulation */
1252 if (gigaset_isoc_buildframe(bcs
, skb
->data
, len
) == -EAGAIN
) {
1253 /* insufficient buffer space, push back onto queue */
1254 skb_queue_head(&bcs
->squeue
, skb
);
1255 gig_dbg(DEBUG_ISO
, "%s: skb requeued, qlen=%d",
1256 __func__
, skb_queue_len(&bcs
->squeue
));
1260 gigaset_skb_sent(bcs
, skb
);
1261 dev_kfree_skb_any(skb
);
1265 /* Isochronous Read - Bottom Half */
1266 /* ============================== */
1269 * tasklet scheduled when an isochronous input URB from the Gigaset device
1272 * data B channel state structure
1274 static void read_iso_tasklet(unsigned long data
)
1276 struct bc_state
*bcs
= (struct bc_state
*) data
;
1277 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
1278 struct cardstate
*cs
= bcs
->cs
;
1282 unsigned long flags
;
1283 int totleft
, numbytes
, offset
, frame
, rc
;
1285 /* loop while more completed URBs arrive in the meantime */
1288 spin_lock_irqsave(&ubc
->isoinlock
, flags
);
1289 urb
= ubc
->isoindone
;
1291 spin_unlock_irqrestore(&ubc
->isoinlock
, flags
);
1294 status
= ubc
->isoinstatus
;
1295 ubc
->isoindone
= NULL
;
1296 if (unlikely(ubc
->loststatus
!= -EINPROGRESS
)) {
1298 "isochronous read overrun, "
1299 "dropped URB with status: %s, %d bytes lost\n",
1300 get_usb_statmsg(ubc
->loststatus
),
1302 ubc
->loststatus
= -EINPROGRESS
;
1304 spin_unlock_irqrestore(&ubc
->isoinlock
, flags
);
1306 if (unlikely(!(ubc
->running
))) {
1308 "%s: channel not running, "
1309 "dropped URB with status: %s",
1310 __func__
, get_usb_statmsg(status
));
1315 case 0: /* normal completion */
1317 case -EXDEV
: /* inspect individual frames
1318 (we do that anyway) */
1319 gig_dbg(DEBUG_ISO
, "%s: URB partially completed",
1325 gig_dbg(DEBUG_ISO
, "%s: %s",
1326 __func__
, get_usb_statmsg(status
));
1327 continue; /* -> skip */
1329 dev_err(cs
->dev
, "isochronous read stalled\n");
1331 continue; /* -> skip */
1332 default: /* severe trouble */
1333 dev_warn(cs
->dev
, "isochronous read: %s\n",
1334 get_usb_statmsg(status
));
1338 rcvbuf
= urb
->transfer_buffer
;
1339 totleft
= urb
->actual_length
;
1340 for (frame
= 0; totleft
> 0 && frame
< BAS_NUMFRAMES
; frame
++) {
1341 numbytes
= urb
->iso_frame_desc
[frame
].actual_length
;
1342 if (unlikely(urb
->iso_frame_desc
[frame
].status
))
1344 "isochronous read: frame %d[%d]: %s\n",
1347 urb
->iso_frame_desc
[frame
].status
));
1348 if (unlikely(numbytes
> BAS_MAXFRAME
))
1350 "isochronous read: frame %d: "
1351 "numbytes (%d) > BAS_MAXFRAME\n",
1353 if (unlikely(numbytes
> totleft
)) {
1355 "isochronous read: frame %d: "
1356 "numbytes (%d) > totleft (%d)\n",
1357 frame
, numbytes
, totleft
);
1360 offset
= urb
->iso_frame_desc
[frame
].offset
;
1361 if (unlikely(offset
+ numbytes
> BAS_INBUFSIZE
)) {
1363 "isochronous read: frame %d: "
1364 "offset (%d) + numbytes (%d) "
1365 "> BAS_INBUFSIZE\n",
1366 frame
, offset
, numbytes
);
1367 numbytes
= BAS_INBUFSIZE
- offset
;
1369 gigaset_isoc_receive(rcvbuf
+ offset
, numbytes
, bcs
);
1370 totleft
-= numbytes
;
1372 if (unlikely(totleft
> 0))
1374 "isochronous read: %d data bytes missing\n",
1378 /* URB processed, resubmit */
1379 for (frame
= 0; frame
< BAS_NUMFRAMES
; frame
++) {
1380 urb
->iso_frame_desc
[frame
].status
= 0;
1381 urb
->iso_frame_desc
[frame
].actual_length
= 0;
1383 /* urb->dev is clobbered by USB subsystem */
1384 urb
->dev
= bcs
->cs
->hw
.bas
->udev
;
1385 urb
->transfer_flags
= URB_ISO_ASAP
;
1386 urb
->number_of_packets
= BAS_NUMFRAMES
;
1387 rc
= usb_submit_urb(urb
, GFP_ATOMIC
);
1388 if (unlikely(rc
!= 0 && rc
!= -ENODEV
)) {
1390 "could not resubmit isochronous read URB: %s\n",
1392 dump_urb(DEBUG_ISO
, "resubmit iso read", urb
);
1398 /* Channel Operations */
1399 /* ================== */
1402 * timeout routine for control output request
1404 * B channel control structure
1406 static void req_timeout(unsigned long data
)
1408 struct bc_state
*bcs
= (struct bc_state
*) data
;
1409 struct bas_cardstate
*ucs
= bcs
->cs
->hw
.bas
;
1411 unsigned long flags
;
1415 spin_lock_irqsave(&ucs
->lock
, flags
);
1416 pending
= ucs
->pending
;
1418 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1421 case 0: /* no pending request */
1422 gig_dbg(DEBUG_USBREQ
, "%s: no request pending", __func__
);
1425 case HD_OPEN_ATCHANNEL
:
1426 dev_err(bcs
->cs
->dev
, "timeout opening AT channel\n");
1427 error_reset(bcs
->cs
);
1430 case HD_OPEN_B2CHANNEL
:
1431 case HD_OPEN_B1CHANNEL
:
1432 dev_err(bcs
->cs
->dev
, "timeout opening channel %d\n",
1437 case HD_CLOSE_ATCHANNEL
:
1438 dev_err(bcs
->cs
->dev
, "timeout closing AT channel\n");
1439 error_reset(bcs
->cs
);
1442 case HD_CLOSE_B2CHANNEL
:
1443 case HD_CLOSE_B1CHANNEL
:
1444 dev_err(bcs
->cs
->dev
, "timeout closing channel %d\n",
1446 error_reset(bcs
->cs
);
1449 case HD_RESET_INTERRUPT_PIPE
:
1450 /* error recovery escalation */
1451 dev_err(bcs
->cs
->dev
,
1452 "reset interrupt pipe timeout, attempting USB reset\n");
1453 usb_queue_reset_device(bcs
->cs
->hw
.bas
->interface
);
1457 dev_warn(bcs
->cs
->dev
, "request 0x%02x timed out, clearing\n",
1461 wake_up(&ucs
->waitqueue
);
1464 /* write_ctrl_callback
1465 * USB completion handler for control pipe output
1466 * called by the USB subsystem in interrupt context
1468 * urb USB request block of completed request
1469 * urb->context = hardware specific controller state structure
1471 static void write_ctrl_callback(struct urb
*urb
)
1473 struct bas_cardstate
*ucs
= urb
->context
;
1474 int status
= urb
->status
;
1476 unsigned long flags
;
1480 case 0: /* normal completion */
1481 spin_lock_irqsave(&ucs
->lock
, flags
);
1482 switch (ucs
->pending
) {
1483 case HD_DEVICE_INIT_ACK
: /* no reply expected */
1484 del_timer(&ucs
->timer_ctrl
);
1488 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1491 case -ENOENT
: /* cancelled */
1492 case -ECONNRESET
: /* cancelled (async) */
1493 case -EINPROGRESS
: /* pending */
1494 case -ENODEV
: /* device removed */
1495 case -ESHUTDOWN
: /* device shut down */
1496 /* ignore silently */
1497 gig_dbg(DEBUG_USBREQ
, "%s: %s",
1498 __func__
, get_usb_statmsg(status
));
1501 default: /* any failure */
1502 /* don't retry if suspend requested */
1503 if (++ucs
->retry_ctrl
> BAS_RETRY
||
1504 (ucs
->basstate
& BS_SUSPEND
)) {
1505 dev_err(&ucs
->interface
->dev
,
1506 "control request 0x%02x failed: %s\n",
1507 ucs
->dr_ctrl
.bRequest
,
1508 get_usb_statmsg(status
));
1509 break; /* give up */
1511 dev_notice(&ucs
->interface
->dev
,
1512 "control request 0x%02x: %s, retry %d\n",
1513 ucs
->dr_ctrl
.bRequest
, get_usb_statmsg(status
),
1515 /* urb->dev is clobbered by USB subsystem */
1516 urb
->dev
= ucs
->udev
;
1517 rc
= usb_submit_urb(urb
, GFP_ATOMIC
);
1519 dev_err(&ucs
->interface
->dev
,
1520 "could not resubmit request 0x%02x: %s\n",
1521 ucs
->dr_ctrl
.bRequest
, get_usb_rcmsg(rc
));
1528 /* failed, clear pending request */
1529 spin_lock_irqsave(&ucs
->lock
, flags
);
1530 del_timer(&ucs
->timer_ctrl
);
1532 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1533 wake_up(&ucs
->waitqueue
);
1537 * submit a control output request without message buffer to the Gigaset base
1538 * and optionally start a timeout
1540 * bcs B channel control structure
1541 * req control request code (HD_*)
1542 * val control request parameter value (set to 0 if unused)
1543 * timeout timeout in seconds (0: no timeout)
1546 * -EBUSY if another request is pending
1547 * any URB submission error code
1549 static int req_submit(struct bc_state
*bcs
, int req
, int val
, int timeout
)
1551 struct bas_cardstate
*ucs
= bcs
->cs
->hw
.bas
;
1553 unsigned long flags
;
1555 gig_dbg(DEBUG_USBREQ
, "-------> 0x%02x (%d)", req
, val
);
1557 spin_lock_irqsave(&ucs
->lock
, flags
);
1559 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1560 dev_err(bcs
->cs
->dev
,
1561 "submission of request 0x%02x failed: "
1562 "request 0x%02x still pending\n",
1567 ucs
->dr_ctrl
.bRequestType
= OUT_VENDOR_REQ
;
1568 ucs
->dr_ctrl
.bRequest
= req
;
1569 ucs
->dr_ctrl
.wValue
= cpu_to_le16(val
);
1570 ucs
->dr_ctrl
.wIndex
= 0;
1571 ucs
->dr_ctrl
.wLength
= 0;
1572 usb_fill_control_urb(ucs
->urb_ctrl
, ucs
->udev
,
1573 usb_sndctrlpipe(ucs
->udev
, 0),
1574 (unsigned char *) &ucs
->dr_ctrl
, NULL
, 0,
1575 write_ctrl_callback
, ucs
);
1576 ucs
->retry_ctrl
= 0;
1577 ret
= usb_submit_urb(ucs
->urb_ctrl
, GFP_ATOMIC
);
1578 if (unlikely(ret
)) {
1579 dev_err(bcs
->cs
->dev
, "could not submit request 0x%02x: %s\n",
1580 req
, get_usb_rcmsg(ret
));
1581 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1587 gig_dbg(DEBUG_USBREQ
, "setting timeout of %d/10 secs", timeout
);
1588 ucs
->timer_ctrl
.expires
= jiffies
+ timeout
* HZ
/ 10;
1589 ucs
->timer_ctrl
.data
= (unsigned long) bcs
;
1590 ucs
->timer_ctrl
.function
= req_timeout
;
1591 add_timer(&ucs
->timer_ctrl
);
1594 spin_unlock_irqrestore(&ucs
->lock
, flags
);
1598 /* gigaset_init_bchannel
1599 * called by common.c to connect a B channel
1600 * initialize isochronous I/O and tell the Gigaset base to open the channel
1602 * B channel control structure
1604 * 0 on success, error code < 0 on error
1606 static int gigaset_init_bchannel(struct bc_state
*bcs
)
1608 struct cardstate
*cs
= bcs
->cs
;
1610 unsigned long flags
;
1612 spin_lock_irqsave(&cs
->lock
, flags
);
1613 if (unlikely(!cs
->connected
)) {
1614 gig_dbg(DEBUG_USBREQ
, "%s: not connected", __func__
);
1615 spin_unlock_irqrestore(&cs
->lock
, flags
);
1619 if (cs
->hw
.bas
->basstate
& BS_SUSPEND
) {
1621 "not starting isochronous I/O, "
1622 "suspend in progress\n");
1623 spin_unlock_irqrestore(&cs
->lock
, flags
);
1624 return -EHOSTUNREACH
;
1627 ret
= starturbs(bcs
);
1630 "could not start isochronous I/O for channel B%d: %s\n",
1632 ret
== -EFAULT
? "null URB" : get_usb_rcmsg(ret
));
1635 spin_unlock_irqrestore(&cs
->lock
, flags
);
1639 req
= bcs
->channel
? HD_OPEN_B2CHANNEL
: HD_OPEN_B1CHANNEL
;
1640 ret
= req_submit(bcs
, req
, 0, BAS_TIMEOUT
);
1642 dev_err(cs
->dev
, "could not open channel B%d\n",
1644 stopurbs(bcs
->hw
.bas
);
1649 spin_unlock_irqrestore(&cs
->lock
, flags
);
1653 /* gigaset_close_bchannel
1654 * called by common.c to disconnect a B channel
1655 * tell the Gigaset base to close the channel
1656 * stopping isochronous I/O and LL notification will be done when the
1657 * acknowledgement for the close arrives
1659 * B channel control structure
1661 * 0 on success, error code < 0 on error
1663 static int gigaset_close_bchannel(struct bc_state
*bcs
)
1665 struct cardstate
*cs
= bcs
->cs
;
1667 unsigned long flags
;
1669 spin_lock_irqsave(&cs
->lock
, flags
);
1670 if (unlikely(!cs
->connected
)) {
1671 spin_unlock_irqrestore(&cs
->lock
, flags
);
1672 gig_dbg(DEBUG_USBREQ
, "%s: not connected", __func__
);
1676 if (!(cs
->hw
.bas
->basstate
& (bcs
->channel
? BS_B2OPEN
: BS_B1OPEN
))) {
1677 /* channel not running: just signal common.c */
1678 spin_unlock_irqrestore(&cs
->lock
, flags
);
1679 gigaset_bchannel_down(bcs
);
1683 /* channel running: tell device to close it */
1684 req
= bcs
->channel
? HD_CLOSE_B2CHANNEL
: HD_CLOSE_B1CHANNEL
;
1685 ret
= req_submit(bcs
, req
, 0, BAS_TIMEOUT
);
1687 dev_err(cs
->dev
, "closing channel B%d failed\n",
1690 spin_unlock_irqrestore(&cs
->lock
, flags
);
1694 /* Device Operations */
1695 /* ================= */
1698 * unqueue first command buffer from queue, waking any sleepers
1699 * must be called with cs->cmdlock held
1701 * cs controller state structure
1703 static void complete_cb(struct cardstate
*cs
)
1705 struct cmdbuf_t
*cb
= cs
->cmdbuf
;
1707 /* unqueue completed buffer */
1708 cs
->cmdbytes
-= cs
->curlen
;
1709 gig_dbg(DEBUG_TRANSCMD
|DEBUG_LOCKCMD
,
1710 "write_command: sent %u bytes, %u left",
1711 cs
->curlen
, cs
->cmdbytes
);
1712 if (cb
->next
!= NULL
) {
1713 cs
->cmdbuf
= cb
->next
;
1714 cs
->cmdbuf
->prev
= NULL
;
1715 cs
->curlen
= cs
->cmdbuf
->len
;
1718 cs
->lastcmdbuf
= NULL
;
1722 if (cb
->wake_tasklet
)
1723 tasklet_schedule(cb
->wake_tasklet
);
1728 /* write_command_callback
1729 * USB completion handler for AT command transmission
1730 * called by the USB subsystem in interrupt context
1732 * urb USB request block of completed request
1733 * urb->context = controller state structure
1735 static void write_command_callback(struct urb
*urb
)
1737 struct cardstate
*cs
= urb
->context
;
1738 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1739 int status
= urb
->status
;
1740 unsigned long flags
;
1742 update_basstate(ucs
, 0, BS_ATWRPEND
);
1743 wake_up(&ucs
->waitqueue
);
1747 case 0: /* normal completion */
1749 case -ENOENT
: /* cancelled */
1750 case -ECONNRESET
: /* cancelled (async) */
1751 case -EINPROGRESS
: /* pending */
1752 case -ENODEV
: /* device removed */
1753 case -ESHUTDOWN
: /* device shut down */
1754 /* ignore silently */
1755 gig_dbg(DEBUG_USBREQ
, "%s: %s",
1756 __func__
, get_usb_statmsg(status
));
1758 default: /* any failure */
1759 if (++ucs
->retry_cmd_out
> BAS_RETRY
) {
1761 "command write: %s, "
1762 "giving up after %d retries\n",
1763 get_usb_statmsg(status
),
1764 ucs
->retry_cmd_out
);
1767 if (ucs
->basstate
& BS_SUSPEND
) {
1769 "command write: %s, "
1770 "won't retry - suspend requested\n",
1771 get_usb_statmsg(status
));
1774 if (cs
->cmdbuf
== NULL
) {
1776 "command write: %s, "
1777 "cannot retry - cmdbuf gone\n",
1778 get_usb_statmsg(status
));
1781 dev_notice(cs
->dev
, "command write: %s, retry %d\n",
1782 get_usb_statmsg(status
), ucs
->retry_cmd_out
);
1783 if (atwrite_submit(cs
, cs
->cmdbuf
->buf
, cs
->cmdbuf
->len
) >= 0)
1784 /* resubmitted - bypass regular exit block */
1786 /* command send failed, assume base still waiting */
1787 update_basstate(ucs
, BS_ATREADY
, 0);
1790 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1791 if (cs
->cmdbuf
!= NULL
)
1793 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1797 * timeout routine for AT command transmission
1799 * controller state structure
1801 static void atrdy_timeout(unsigned long data
)
1803 struct cardstate
*cs
= (struct cardstate
*) data
;
1804 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1806 dev_warn(cs
->dev
, "timeout waiting for HD_READY_SEND_ATDATA\n");
1808 /* fake the missing signal - what else can I do? */
1809 update_basstate(ucs
, BS_ATREADY
, BS_ATTIMER
);
1814 * submit an HD_WRITE_ATMESSAGE command URB
1816 * cs controller state structure
1817 * buf buffer containing command to send
1818 * len length of command to send
1821 * -EBUSY if another request is pending
1822 * any URB submission error code
1824 static int atwrite_submit(struct cardstate
*cs
, unsigned char *buf
, int len
)
1826 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1829 gig_dbg(DEBUG_USBREQ
, "-------> HD_WRITE_ATMESSAGE (%d)", len
);
1831 if (update_basstate(ucs
, BS_ATWRPEND
, 0) & BS_ATWRPEND
) {
1833 "could not submit HD_WRITE_ATMESSAGE: URB busy\n");
1837 ucs
->dr_cmd_out
.bRequestType
= OUT_VENDOR_REQ
;
1838 ucs
->dr_cmd_out
.bRequest
= HD_WRITE_ATMESSAGE
;
1839 ucs
->dr_cmd_out
.wValue
= 0;
1840 ucs
->dr_cmd_out
.wIndex
= 0;
1841 ucs
->dr_cmd_out
.wLength
= cpu_to_le16(len
);
1842 usb_fill_control_urb(ucs
->urb_cmd_out
, ucs
->udev
,
1843 usb_sndctrlpipe(ucs
->udev
, 0),
1844 (unsigned char *) &ucs
->dr_cmd_out
, buf
, len
,
1845 write_command_callback
, cs
);
1846 rc
= usb_submit_urb(ucs
->urb_cmd_out
, GFP_ATOMIC
);
1848 update_basstate(ucs
, 0, BS_ATWRPEND
);
1849 dev_err(cs
->dev
, "could not submit HD_WRITE_ATMESSAGE: %s\n",
1854 /* submitted successfully, start timeout if necessary */
1855 if (!(update_basstate(ucs
, BS_ATTIMER
, BS_ATREADY
) & BS_ATTIMER
)) {
1856 gig_dbg(DEBUG_OUTPUT
, "setting ATREADY timeout of %d/10 secs",
1858 ucs
->timer_atrdy
.expires
= jiffies
+ ATRDY_TIMEOUT
* HZ
/ 10;
1859 ucs
->timer_atrdy
.data
= (unsigned long) cs
;
1860 ucs
->timer_atrdy
.function
= atrdy_timeout
;
1861 add_timer(&ucs
->timer_atrdy
);
1867 * start transmission of AT command queue if necessary
1869 * cs controller state structure
1872 * error code < 0 on error
1874 static int start_cbsend(struct cardstate
*cs
)
1876 struct cmdbuf_t
*cb
;
1877 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
1878 unsigned long flags
;
1882 /* check if suspend requested */
1883 if (ucs
->basstate
& BS_SUSPEND
) {
1884 gig_dbg(DEBUG_TRANSCMD
|DEBUG_LOCKCMD
, "suspending");
1885 return -EHOSTUNREACH
;
1888 /* check if AT channel is open */
1889 if (!(ucs
->basstate
& BS_ATOPEN
)) {
1890 gig_dbg(DEBUG_TRANSCMD
|DEBUG_LOCKCMD
, "AT channel not open");
1891 rc
= req_submit(cs
->bcs
, HD_OPEN_ATCHANNEL
, 0, BAS_TIMEOUT
);
1893 /* flush command queue */
1894 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1895 while (cs
->cmdbuf
!= NULL
)
1897 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1902 /* try to send first command in queue */
1903 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1905 while ((cb
= cs
->cmdbuf
) != NULL
&& (ucs
->basstate
& BS_ATREADY
)) {
1906 ucs
->retry_cmd_out
= 0;
1907 rc
= atwrite_submit(cs
, cb
->buf
, cb
->len
);
1914 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1918 /* gigaset_write_cmd
1919 * This function is called by the device independent part of the driver
1920 * to transmit an AT command string to the Gigaset device.
1921 * It encapsulates the device specific method for transmission over the
1922 * direct USB connection to the base.
1923 * The command string is added to the queue of commands to send, and
1924 * USB transmission is started if necessary.
1926 * cs controller state structure
1927 * buf command string to send
1928 * len number of bytes to send (max. IF_WRITEBUF)
1929 * wake_tasklet tasklet to run when transmission is completed
1932 * number of bytes queued on success
1933 * error code < 0 on error
1935 static int gigaset_write_cmd(struct cardstate
*cs
,
1936 const unsigned char *buf
, int len
,
1937 struct tasklet_struct
*wake_tasklet
)
1939 struct cmdbuf_t
*cb
;
1940 unsigned long flags
;
1943 gigaset_dbg_buffer(cs
->mstate
!= MS_LOCKED
?
1944 DEBUG_TRANSCMD
: DEBUG_LOCKCMD
,
1945 "CMD Transmit", len
, buf
);
1953 /* translate "+++" escape sequence sent as a single separate command
1954 * into "close AT channel" command for error recovery
1955 * The next command will reopen the AT channel automatically.
1957 if (len
== 3 && !memcmp(buf
, "+++", 3)) {
1958 rc
= req_submit(cs
->bcs
, HD_CLOSE_ATCHANNEL
, 0, BAS_TIMEOUT
);
1962 if (len
> IF_WRITEBUF
)
1964 cb
= kmalloc(sizeof(struct cmdbuf_t
) + len
, GFP_ATOMIC
);
1966 dev_err(cs
->dev
, "%s: out of memory\n", __func__
);
1971 memcpy(cb
->buf
, buf
, len
);
1975 cb
->wake_tasklet
= wake_tasklet
;
1977 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1978 cb
->prev
= cs
->lastcmdbuf
;
1980 cs
->lastcmdbuf
->next
= cb
;
1985 cs
->cmdbytes
+= len
;
1986 cs
->lastcmdbuf
= cb
;
1987 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
1989 spin_lock_irqsave(&cs
->lock
, flags
);
1990 if (unlikely(!cs
->connected
)) {
1991 spin_unlock_irqrestore(&cs
->lock
, flags
);
1992 gig_dbg(DEBUG_USBREQ
, "%s: not connected", __func__
);
1993 /* flush command queue */
1994 spin_lock_irqsave(&cs
->cmdlock
, flags
);
1995 while (cs
->cmdbuf
!= NULL
)
1997 spin_unlock_irqrestore(&cs
->cmdlock
, flags
);
2000 rc
= start_cbsend(cs
);
2001 spin_unlock_irqrestore(&cs
->lock
, flags
);
2002 return rc
< 0 ? rc
: len
;
2004 notqueued
: /* request handled without queuing */
2006 tasklet_schedule(wake_tasklet
);
2010 /* gigaset_write_room
2011 * tty_driver.write_room interface routine
2012 * return number of characters the driver will accept to be written via
2015 * controller state structure
2017 * number of characters
2019 static int gigaset_write_room(struct cardstate
*cs
)
2024 /* gigaset_chars_in_buffer
2025 * tty_driver.chars_in_buffer interface routine
2026 * return number of characters waiting to be sent
2028 * controller state structure
2030 * number of characters
2032 static int gigaset_chars_in_buffer(struct cardstate
*cs
)
2034 return cs
->cmdbytes
;
2038 * implementation of ioctl(GIGASET_BRKCHARS)
2040 * controller state structure
2042 * -EINVAL (unimplemented function)
2044 static int gigaset_brkchars(struct cardstate
*cs
, const unsigned char buf
[6])
2050 /* Device Initialization/Shutdown */
2051 /* ============================== */
2053 /* Free hardware dependent part of the B channel structure
2055 * bcs B channel structure
2059 static int gigaset_freebcshw(struct bc_state
*bcs
)
2061 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
2067 /* kill URBs and tasklets before freeing - better safe than sorry */
2069 gig_dbg(DEBUG_INIT
, "%s: killing iso URBs", __func__
);
2070 for (i
= 0; i
< BAS_OUTURBS
; ++i
) {
2071 usb_kill_urb(ubc
->isoouturbs
[i
].urb
);
2072 usb_free_urb(ubc
->isoouturbs
[i
].urb
);
2074 for (i
= 0; i
< BAS_INURBS
; ++i
) {
2075 usb_kill_urb(ubc
->isoinurbs
[i
]);
2076 usb_free_urb(ubc
->isoinurbs
[i
]);
2078 tasklet_kill(&ubc
->sent_tasklet
);
2079 tasklet_kill(&ubc
->rcvd_tasklet
);
2080 kfree(ubc
->isooutbuf
);
2086 /* Initialize hardware dependent part of the B channel structure
2088 * bcs B channel structure
2092 static int gigaset_initbcshw(struct bc_state
*bcs
)
2095 struct bas_bc_state
*ubc
;
2097 bcs
->hw
.bas
= ubc
= kmalloc(sizeof(struct bas_bc_state
), GFP_KERNEL
);
2099 pr_err("out of memory\n");
2104 atomic_set(&ubc
->corrbytes
, 0);
2105 spin_lock_init(&ubc
->isooutlock
);
2106 for (i
= 0; i
< BAS_OUTURBS
; ++i
) {
2107 ubc
->isoouturbs
[i
].urb
= NULL
;
2108 ubc
->isoouturbs
[i
].bcs
= bcs
;
2110 ubc
->isooutdone
= ubc
->isooutfree
= ubc
->isooutovfl
= NULL
;
2112 ubc
->isooutbuf
= kmalloc(sizeof(struct isowbuf_t
), GFP_KERNEL
);
2113 if (!ubc
->isooutbuf
) {
2114 pr_err("out of memory\n");
2119 tasklet_init(&ubc
->sent_tasklet
,
2120 write_iso_tasklet
, (unsigned long) bcs
);
2122 spin_lock_init(&ubc
->isoinlock
);
2123 for (i
= 0; i
< BAS_INURBS
; ++i
)
2124 ubc
->isoinurbs
[i
] = NULL
;
2125 ubc
->isoindone
= NULL
;
2126 ubc
->loststatus
= -EINPROGRESS
;
2140 tasklet_init(&ubc
->rcvd_tasklet
,
2141 read_iso_tasklet
, (unsigned long) bcs
);
2145 static void gigaset_reinitbcshw(struct bc_state
*bcs
)
2147 struct bas_bc_state
*ubc
= bcs
->hw
.bas
;
2149 bcs
->hw
.bas
->running
= 0;
2150 atomic_set(&bcs
->hw
.bas
->corrbytes
, 0);
2151 bcs
->hw
.bas
->numsub
= 0;
2152 spin_lock_init(&ubc
->isooutlock
);
2153 spin_lock_init(&ubc
->isoinlock
);
2154 ubc
->loststatus
= -EINPROGRESS
;
2157 static void gigaset_freecshw(struct cardstate
*cs
)
2159 /* timers, URBs and rcvbuf are disposed of in disconnect */
2160 kfree(cs
->hw
.bas
->int_in_buf
);
2165 static int gigaset_initcshw(struct cardstate
*cs
)
2167 struct bas_cardstate
*ucs
;
2169 cs
->hw
.bas
= ucs
= kmalloc(sizeof *ucs
, GFP_KERNEL
);
2171 pr_err("out of memory\n");
2174 ucs
->int_in_buf
= kmalloc(IP_MSGSIZE
, GFP_KERNEL
);
2175 if (!ucs
->int_in_buf
) {
2177 pr_err("out of memory\n");
2181 ucs
->urb_cmd_in
= NULL
;
2182 ucs
->urb_cmd_out
= NULL
;
2184 ucs
->rcvbuf_size
= 0;
2186 spin_lock_init(&ucs
->lock
);
2190 init_timer(&ucs
->timer_ctrl
);
2191 init_timer(&ucs
->timer_atrdy
);
2192 init_timer(&ucs
->timer_cmd_in
);
2193 init_waitqueue_head(&ucs
->waitqueue
);
2199 * unlink and deallocate all URBs unconditionally
2200 * caller must make sure that no commands are still in progress
2202 * cs controller state structure
2204 static void freeurbs(struct cardstate
*cs
)
2206 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
2207 struct bas_bc_state
*ubc
;
2210 gig_dbg(DEBUG_INIT
, "%s: killing URBs", __func__
);
2211 for (j
= 0; j
< BAS_CHANNELS
; ++j
) {
2212 ubc
= cs
->bcs
[j
].hw
.bas
;
2213 for (i
= 0; i
< BAS_OUTURBS
; ++i
) {
2214 usb_kill_urb(ubc
->isoouturbs
[i
].urb
);
2215 usb_free_urb(ubc
->isoouturbs
[i
].urb
);
2216 ubc
->isoouturbs
[i
].urb
= NULL
;
2218 for (i
= 0; i
< BAS_INURBS
; ++i
) {
2219 usb_kill_urb(ubc
->isoinurbs
[i
]);
2220 usb_free_urb(ubc
->isoinurbs
[i
]);
2221 ubc
->isoinurbs
[i
] = NULL
;
2224 usb_kill_urb(ucs
->urb_int_in
);
2225 usb_free_urb(ucs
->urb_int_in
);
2226 ucs
->urb_int_in
= NULL
;
2227 usb_kill_urb(ucs
->urb_cmd_out
);
2228 usb_free_urb(ucs
->urb_cmd_out
);
2229 ucs
->urb_cmd_out
= NULL
;
2230 usb_kill_urb(ucs
->urb_cmd_in
);
2231 usb_free_urb(ucs
->urb_cmd_in
);
2232 ucs
->urb_cmd_in
= NULL
;
2233 usb_kill_urb(ucs
->urb_ctrl
);
2234 usb_free_urb(ucs
->urb_ctrl
);
2235 ucs
->urb_ctrl
= NULL
;
2239 * This function is called when a new USB device is connected.
2240 * It checks whether the new device is handled by this driver.
2242 static int gigaset_probe(struct usb_interface
*interface
,
2243 const struct usb_device_id
*id
)
2245 struct usb_host_interface
*hostif
;
2246 struct usb_device
*udev
= interface_to_usbdev(interface
);
2247 struct cardstate
*cs
= NULL
;
2248 struct bas_cardstate
*ucs
= NULL
;
2249 struct bas_bc_state
*ubc
;
2250 struct usb_endpoint_descriptor
*endpoint
;
2255 "%s: Check if device matches .. (Vendor: 0x%x, Product: 0x%x)",
2256 __func__
, le16_to_cpu(udev
->descriptor
.idVendor
),
2257 le16_to_cpu(udev
->descriptor
.idProduct
));
2259 /* set required alternate setting */
2260 hostif
= interface
->cur_altsetting
;
2261 if (hostif
->desc
.bAlternateSetting
!= 3) {
2263 "%s: wrong alternate setting %d - trying to switch",
2264 __func__
, hostif
->desc
.bAlternateSetting
);
2265 if (usb_set_interface(udev
, hostif
->desc
.bInterfaceNumber
, 3)
2267 dev_warn(&udev
->dev
, "usb_set_interface failed, "
2268 "device %d interface %d altsetting %d\n",
2269 udev
->devnum
, hostif
->desc
.bInterfaceNumber
,
2270 hostif
->desc
.bAlternateSetting
);
2273 hostif
= interface
->cur_altsetting
;
2276 /* Reject application specific interfaces
2278 if (hostif
->desc
.bInterfaceClass
!= 255) {
2279 dev_warn(&udev
->dev
, "%s: bInterfaceClass == %d\n",
2280 __func__
, hostif
->desc
.bInterfaceClass
);
2284 dev_info(&udev
->dev
,
2285 "%s: Device matched (Vendor: 0x%x, Product: 0x%x)\n",
2286 __func__
, le16_to_cpu(udev
->descriptor
.idVendor
),
2287 le16_to_cpu(udev
->descriptor
.idProduct
));
2289 /* allocate memory for our device state and intialize it */
2290 cs
= gigaset_initcs(driver
, BAS_CHANNELS
, 0, 0, cidmode
,
2291 GIGASET_MODULENAME
);
2296 /* save off device structure ptrs for later use */
2299 ucs
->interface
= interface
;
2300 cs
->dev
= &interface
->dev
;
2303 * - one for the interrupt pipe
2304 * - three for the different uses of the default control pipe
2305 * - three for each isochronous pipe
2307 if (!(ucs
->urb_int_in
= usb_alloc_urb(0, GFP_KERNEL
)) ||
2308 !(ucs
->urb_cmd_in
= usb_alloc_urb(0, GFP_KERNEL
)) ||
2309 !(ucs
->urb_cmd_out
= usb_alloc_urb(0, GFP_KERNEL
)) ||
2310 !(ucs
->urb_ctrl
= usb_alloc_urb(0, GFP_KERNEL
)))
2313 for (j
= 0; j
< BAS_CHANNELS
; ++j
) {
2314 ubc
= cs
->bcs
[j
].hw
.bas
;
2315 for (i
= 0; i
< BAS_OUTURBS
; ++i
)
2316 if (!(ubc
->isoouturbs
[i
].urb
=
2317 usb_alloc_urb(BAS_NUMFRAMES
, GFP_KERNEL
)))
2319 for (i
= 0; i
< BAS_INURBS
; ++i
)
2320 if (!(ubc
->isoinurbs
[i
] =
2321 usb_alloc_urb(BAS_NUMFRAMES
, GFP_KERNEL
)))
2326 ucs
->rcvbuf_size
= 0;
2328 /* Fill the interrupt urb and send it to the core */
2329 endpoint
= &hostif
->endpoint
[0].desc
;
2330 usb_fill_int_urb(ucs
->urb_int_in
, udev
,
2331 usb_rcvintpipe(udev
,
2332 (endpoint
->bEndpointAddress
) & 0x0f),
2333 ucs
->int_in_buf
, IP_MSGSIZE
, read_int_callback
, cs
,
2334 endpoint
->bInterval
);
2335 rc
= usb_submit_urb(ucs
->urb_int_in
, GFP_KERNEL
);
2337 dev_err(cs
->dev
, "could not submit interrupt URB: %s\n",
2342 /* tell the device that the driver is ready */
2343 rc
= req_submit(cs
->bcs
, HD_DEVICE_INIT_ACK
, 0, 0);
2347 /* tell common part that the device is ready */
2348 if (startmode
== SM_LOCKED
)
2349 cs
->mstate
= MS_LOCKED
;
2351 /* save address of controller structure */
2352 usb_set_intfdata(interface
, cs
);
2354 if (!gigaset_start(cs
))
2360 dev_err(cs
->dev
, "could not allocate URBs\n");
2363 usb_set_intfdata(interface
, NULL
);
2368 /* gigaset_disconnect
2369 * This function is called when the Gigaset base is unplugged.
2371 static void gigaset_disconnect(struct usb_interface
*interface
)
2373 struct cardstate
*cs
;
2374 struct bas_cardstate
*ucs
;
2377 cs
= usb_get_intfdata(interface
);
2381 dev_info(cs
->dev
, "disconnecting Gigaset base\n");
2383 /* mark base as not ready, all channels disconnected */
2386 /* tell LL all channels are down */
2387 for (j
= 0; j
< BAS_CHANNELS
; ++j
)
2388 gigaset_bchannel_down(cs
->bcs
+ j
);
2390 /* stop driver (common part) */
2393 /* stop timers and URBs, free ressources */
2394 del_timer_sync(&ucs
->timer_ctrl
);
2395 del_timer_sync(&ucs
->timer_atrdy
);
2396 del_timer_sync(&ucs
->timer_cmd_in
);
2398 usb_set_intfdata(interface
, NULL
);
2401 ucs
->rcvbuf_size
= 0;
2402 usb_put_dev(ucs
->udev
);
2403 ucs
->interface
= NULL
;
2410 * This function is called before the USB connection is suspended.
2412 static int gigaset_suspend(struct usb_interface
*intf
, pm_message_t message
)
2414 struct cardstate
*cs
= usb_get_intfdata(intf
);
2415 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
2418 /* set suspend flag; this stops AT command/response traffic */
2419 if (update_basstate(ucs
, BS_SUSPEND
, 0) & BS_SUSPEND
) {
2420 gig_dbg(DEBUG_SUSPEND
, "already suspended");
2424 /* wait a bit for blocking conditions to go away */
2425 rc
= wait_event_timeout(ucs
->waitqueue
,
2427 (BS_B1OPEN
|BS_B2OPEN
|BS_ATRDPEND
|BS_ATWRPEND
)),
2429 gig_dbg(DEBUG_SUSPEND
, "wait_event_timeout() -> %d", rc
);
2431 /* check for conditions preventing suspend */
2432 if (ucs
->basstate
& (BS_B1OPEN
|BS_B2OPEN
|BS_ATRDPEND
|BS_ATWRPEND
)) {
2433 dev_warn(cs
->dev
, "cannot suspend:\n");
2434 if (ucs
->basstate
& BS_B1OPEN
)
2435 dev_warn(cs
->dev
, " B channel 1 open\n");
2436 if (ucs
->basstate
& BS_B2OPEN
)
2437 dev_warn(cs
->dev
, " B channel 2 open\n");
2438 if (ucs
->basstate
& BS_ATRDPEND
)
2439 dev_warn(cs
->dev
, " receiving AT reply\n");
2440 if (ucs
->basstate
& BS_ATWRPEND
)
2441 dev_warn(cs
->dev
, " sending AT command\n");
2442 update_basstate(ucs
, 0, BS_SUSPEND
);
2446 /* close AT channel if open */
2447 if (ucs
->basstate
& BS_ATOPEN
) {
2448 gig_dbg(DEBUG_SUSPEND
, "closing AT channel");
2449 rc
= req_submit(cs
->bcs
, HD_CLOSE_ATCHANNEL
, 0, 0);
2451 update_basstate(ucs
, 0, BS_SUSPEND
);
2454 wait_event_timeout(ucs
->waitqueue
, !ucs
->pending
,
2456 /* in case of timeout, proceed anyway */
2459 /* kill all URBs and timers that might still be pending */
2460 usb_kill_urb(ucs
->urb_ctrl
);
2461 usb_kill_urb(ucs
->urb_int_in
);
2462 del_timer_sync(&ucs
->timer_ctrl
);
2464 gig_dbg(DEBUG_SUSPEND
, "suspend complete");
2469 * This function is called after the USB connection has been resumed.
2471 static int gigaset_resume(struct usb_interface
*intf
)
2473 struct cardstate
*cs
= usb_get_intfdata(intf
);
2474 struct bas_cardstate
*ucs
= cs
->hw
.bas
;
2477 /* resubmit interrupt URB for spontaneous messages from base */
2478 rc
= usb_submit_urb(ucs
->urb_int_in
, GFP_KERNEL
);
2480 dev_err(cs
->dev
, "could not resubmit interrupt URB: %s\n",
2485 /* clear suspend flag to reallow activity */
2486 update_basstate(ucs
, 0, BS_SUSPEND
);
2488 gig_dbg(DEBUG_SUSPEND
, "resume complete");
2492 /* gigaset_pre_reset
2493 * This function is called before the USB connection is reset.
2495 static int gigaset_pre_reset(struct usb_interface
*intf
)
2497 /* handle just like suspend */
2498 return gigaset_suspend(intf
, PMSG_ON
);
2501 /* gigaset_post_reset
2502 * This function is called after the USB connection has been reset.
2504 static int gigaset_post_reset(struct usb_interface
*intf
)
2506 /* FIXME: send HD_DEVICE_INIT_ACK? */
2508 /* resume operations */
2509 return gigaset_resume(intf
);
2513 static const struct gigaset_ops gigops
= {
2516 gigaset_chars_in_buffer
,
2518 gigaset_init_bchannel
,
2519 gigaset_close_bchannel
,
2522 gigaset_reinitbcshw
,
2525 gigaset_set_modem_ctrl
,
2527 gigaset_set_line_ctrl
,
2528 gigaset_isoc_send_skb
,
2533 * This function is called after the kernel module is loaded.
2535 static int __init
bas_gigaset_init(void)
2539 /* allocate memory for our driver state and intialize it */
2540 driver
= gigaset_initdriver(GIGASET_MINOR
, GIGASET_MINORS
,
2541 GIGASET_MODULENAME
, GIGASET_DEVNAME
,
2542 &gigops
, THIS_MODULE
);
2546 /* register this driver with the USB subsystem */
2547 result
= usb_register(&gigaset_usb_driver
);
2549 pr_err("error %d registering USB driver\n", -result
);
2553 pr_info(DRIVER_DESC
"\n");
2558 gigaset_freedriver(driver
);
2564 * This function is called before the kernel module is unloaded.
2566 static void __exit
bas_gigaset_exit(void)
2568 struct bas_cardstate
*ucs
;
2571 gigaset_blockdriver(driver
); /* => probe will fail
2572 * => no gigaset_start any more
2575 /* stop all connected devices */
2576 for (i
= 0; i
< driver
->minors
; i
++) {
2577 if (gigaset_shutdown(driver
->cs
+ i
) < 0)
2578 continue; /* no device */
2579 /* from now on, no isdn callback should be possible */
2581 /* close all still open channels */
2582 ucs
= driver
->cs
[i
].hw
.bas
;
2583 if (ucs
->basstate
& BS_B1OPEN
) {
2584 gig_dbg(DEBUG_INIT
, "closing B1 channel");
2585 usb_control_msg(ucs
->udev
,
2586 usb_sndctrlpipe(ucs
->udev
, 0),
2587 HD_CLOSE_B1CHANNEL
, OUT_VENDOR_REQ
,
2588 0, 0, NULL
, 0, BAS_TIMEOUT
);
2590 if (ucs
->basstate
& BS_B2OPEN
) {
2591 gig_dbg(DEBUG_INIT
, "closing B2 channel");
2592 usb_control_msg(ucs
->udev
,
2593 usb_sndctrlpipe(ucs
->udev
, 0),
2594 HD_CLOSE_B2CHANNEL
, OUT_VENDOR_REQ
,
2595 0, 0, NULL
, 0, BAS_TIMEOUT
);
2597 if (ucs
->basstate
& BS_ATOPEN
) {
2598 gig_dbg(DEBUG_INIT
, "closing AT channel");
2599 usb_control_msg(ucs
->udev
,
2600 usb_sndctrlpipe(ucs
->udev
, 0),
2601 HD_CLOSE_ATCHANNEL
, OUT_VENDOR_REQ
,
2602 0, 0, NULL
, 0, BAS_TIMEOUT
);
2607 /* deregister this driver with the USB subsystem */
2608 usb_deregister(&gigaset_usb_driver
);
2609 /* this will call the disconnect-callback */
2610 /* from now on, no disconnect/probe callback should be running */
2612 gigaset_freedriver(driver
);
2617 module_init(bas_gigaset_init
);
2618 module_exit(bas_gigaset_exit
);
2620 MODULE_AUTHOR(DRIVER_AUTHOR
);
2621 MODULE_DESCRIPTION(DRIVER_DESC
);
2622 MODULE_LICENSE("GPL");