diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-05 11:06:45 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-05 11:06:45 -0700 |
commit | 3516c6a8dc0b1153c611c4cf0dc4a51631f052bb (patch) | |
tree | c54a5fc916cbe73e43dee20902642f367f44a551 /drivers/staging/line6/dumprequest.c | |
parent | 714f83d5d9f7c785f622259dad1f4fad12d64664 (diff) | |
parent | ba0e1ebb7ea0616eebc29d2077355bacea62a9d8 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (714 commits)
Staging: sxg: slicoss: Specify the license for Sahara SXG and Slicoss drivers
Staging: serqt_usb: fix build due to proc tty changes
Staging: serqt_usb: fix checkpatch errors
Staging: serqt_usb: add TODO file
Staging: serqt_usb: Lindent the code
Staging: add USB serial Quatech driver
staging: document that the wifi staging drivers a bit better
Staging: echo cleanup
Staging: BUG to BUG_ON changes
Staging: remove some pointless conditionals before kfree_skb()
Staging: line6: fix build error, select SND_RAWMIDI
Staging: line6: fix checkpatch errors in variax.c
Staging: line6: fix checkpatch errors in toneport.c
Staging: line6: fix checkpatch errors in pcm.c
Staging: line6: fix checkpatch errors in midibuf.c
Staging: line6: fix checkpatch errors in midi.c
Staging: line6: fix checkpatch errors in dumprequest.c
Staging: line6: fix checkpatch errors in driver.c
Staging: line6: fix checkpatch errors in audio.c
Staging: line6: fix checkpatch errors in pod.c
...
Diffstat (limited to 'drivers/staging/line6/dumprequest.c')
-rw-r--r-- | drivers/staging/line6/dumprequest.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/staging/line6/dumprequest.c b/drivers/staging/line6/dumprequest.c new file mode 100644 index 00000000000..decbaa971b6 --- /dev/null +++ b/drivers/staging/line6/dumprequest.c @@ -0,0 +1,151 @@ +/* + * Line6 Linux USB driver - 0.8.0 + * + * Copyright (C) 2004-2009 Markus Grabner (grabner@icg.tugraz.at) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2. + * + */ + +#include "driver.h" +#include "dumprequest.h" + + +/* + Set "dump in progress" flag. +*/ +void line6_dump_started(struct line6_dump_request *l6dr, int dest) +{ + l6dr->in_progress = dest; +} + +/* + Invalidate current channel, i.e., set "dump in progress" flag. + Reading from the "dump" special file blocks until dump is completed. +*/ +void line6_invalidate_current(struct line6_dump_request *l6dr) +{ + line6_dump_started(l6dr, LINE6_DUMP_CURRENT); +} + +/* + Clear "dump in progress" flag and notify waiting processes. +*/ +void line6_dump_finished(struct line6_dump_request *l6dr) +{ + l6dr->in_progress = LINE6_DUMP_NONE; + wake_up_interruptible(&l6dr->wait); +} + +/* + Send an asynchronous channel dump request. +*/ +int line6_dump_request_async(struct line6_dump_request *l6dr, + struct usb_line6 *line6, int num) +{ + int ret; + line6_invalidate_current(l6dr); + ret = line6_send_raw_message_async(line6, l6dr->reqbufs[num].buffer, + l6dr->reqbufs[num].length); + + if (ret < 0) + line6_dump_finished(l6dr); + + return ret; +} + +/* + Send an asynchronous dump request after a given interval. +*/ +void line6_startup_delayed(struct line6_dump_request *l6dr, int seconds, + void (*function)(unsigned long), void *data) +{ + l6dr->timer.expires = jiffies + seconds * HZ; + l6dr->timer.function = function; + l6dr->timer.data = (unsigned long)data; + add_timer(&l6dr->timer); +} + +/* + Wait for completion. +*/ +int line6_wait_dump(struct line6_dump_request *l6dr, int nonblock) +{ + int retval = 0; + DECLARE_WAITQUEUE(wait, current); + add_wait_queue(&l6dr->wait, &wait); + current->state = TASK_INTERRUPTIBLE; + + while (l6dr->in_progress) { + if (nonblock) { + retval = -EAGAIN; + break; + } + + if (signal_pending(current)) { + retval = -ERESTARTSYS; + break; + } else + schedule(); + } + + current->state = TASK_RUNNING; + remove_wait_queue(&l6dr->wait, &wait); + return retval; +} + +/* + Initialize dump request buffer. +*/ +int line6_dumpreq_initbuf(struct line6_dump_request *l6dr, const void *buf, + size_t len, int num) +{ + l6dr->reqbufs[num].buffer = kmalloc(len, GFP_KERNEL); + if (l6dr->reqbufs[num].buffer == NULL) + return -ENOMEM; + memcpy(l6dr->reqbufs[num].buffer, buf, len); + l6dr->reqbufs[num].length = len; + return 0; +} + +/* + Initialize dump request data structure (including one buffer). +*/ +int line6_dumpreq_init(struct line6_dump_request *l6dr, const void *buf, + size_t len) +{ + int ret; + ret = line6_dumpreq_initbuf(l6dr, buf, len, 0); + if (ret < 0) + return ret; + init_waitqueue_head(&l6dr->wait); + init_timer(&l6dr->timer); + return 0; +} + +/* + Destruct dump request data structure. +*/ +void line6_dumpreq_destructbuf(struct line6_dump_request *l6dr, int num) +{ + if (l6dr == NULL) + return; + if (l6dr->reqbufs[num].buffer == NULL) + return; + kfree(l6dr->reqbufs[num].buffer); + l6dr->reqbufs[num].buffer = NULL; +} + +/* + Destruct dump request data structure. +*/ +void line6_dumpreq_destruct(struct line6_dump_request *l6dr) +{ + if (l6dr->reqbufs[0].buffer == NULL) + return; + line6_dumpreq_destructbuf(l6dr, 0); + l6dr->ok = 1; + del_timer_sync(&l6dr->timer); +} |