2009-08-03 07:13:23 +00:00
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/*
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* Jeilinj subdriver
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*
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* Supports some Jeilin dual-mode cameras which use bulk transport and
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* download raw JPEG data.
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*
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* Copyright (C) 2009 Theodore Kilgore
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define MODULE_NAME "jeilinj"
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#include <linux/workqueue.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2009-08-03 07:13:23 +00:00
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#include "gspca.h"
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#include "jpeg.h"
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MODULE_AUTHOR("Theodore Kilgore <kilgota@auburn.edu>");
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MODULE_DESCRIPTION("GSPCA/JEILINJ USB Camera Driver");
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MODULE_LICENSE("GPL");
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/* Default timeouts, in ms */
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#define JEILINJ_CMD_TIMEOUT 500
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#define JEILINJ_DATA_TIMEOUT 1000
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/* Maximum transfer size to use. */
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#define JEILINJ_MAX_TRANSFER 0x200
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#define FRAME_HEADER_LEN 0x10
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/* Structure to hold all of our device specific stuff */
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struct sd {
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struct gspca_dev gspca_dev; /* !! must be the first item */
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const struct v4l2_pix_format *cap_mode;
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/* Driver stuff */
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struct work_struct work_struct;
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struct workqueue_struct *work_thread;
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u8 quality; /* image quality */
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u8 jpegqual; /* webcam quality */
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u8 *jpeg_hdr;
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};
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struct jlj_command {
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unsigned char instruction[2];
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unsigned char ack_wanted;
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};
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/* AFAICT these cameras will only do 320x240. */
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static struct v4l2_pix_format jlj_mode[] = {
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{ 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
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.bytesperline = 320,
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.sizeimage = 320 * 240,
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.colorspace = V4L2_COLORSPACE_JPEG,
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.priv = 0}
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};
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/*
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* cam uses endpoint 0x03 to send commands, 0x84 for read commands,
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* and 0x82 for bulk transfer.
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*/
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/* All commands are two bytes only */
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static int jlj_write2(struct gspca_dev *gspca_dev, unsigned char *command)
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{
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int retval;
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memcpy(gspca_dev->usb_buf, command, 2);
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retval = usb_bulk_msg(gspca_dev->dev,
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usb_sndbulkpipe(gspca_dev->dev, 3),
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gspca_dev->usb_buf, 2, NULL, 500);
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if (retval < 0)
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PDEBUG(D_ERR, "command write [%02x] error %d",
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gspca_dev->usb_buf[0], retval);
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return retval;
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}
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/* Responses are one byte only */
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static int jlj_read1(struct gspca_dev *gspca_dev, unsigned char response)
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{
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int retval;
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retval = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x84),
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gspca_dev->usb_buf, 1, NULL, 500);
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response = gspca_dev->usb_buf[0];
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if (retval < 0)
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PDEBUG(D_ERR, "read command [%02x] error %d",
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gspca_dev->usb_buf[0], retval);
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return retval;
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}
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static int jlj_start(struct gspca_dev *gspca_dev)
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{
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int i;
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int retval = -1;
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u8 response = 0xff;
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struct jlj_command start_commands[] = {
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{{0x71, 0x81}, 0},
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{{0x70, 0x05}, 0},
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{{0x95, 0x70}, 1},
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{{0x71, 0x81}, 0},
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{{0x70, 0x04}, 0},
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{{0x95, 0x70}, 1},
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{{0x71, 0x00}, 0},
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{{0x70, 0x08}, 0},
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{{0x95, 0x70}, 1},
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{{0x94, 0x02}, 0},
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{{0xde, 0x24}, 0},
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{{0x94, 0x02}, 0},
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{{0xdd, 0xf0}, 0},
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{{0x94, 0x02}, 0},
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{{0xe3, 0x2c}, 0},
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{{0x94, 0x02}, 0},
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{{0xe4, 0x00}, 0},
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{{0x94, 0x02}, 0},
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{{0xe5, 0x00}, 0},
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{{0x94, 0x02}, 0},
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{{0xe6, 0x2c}, 0},
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{{0x94, 0x03}, 0},
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{{0xaa, 0x00}, 0},
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{{0x71, 0x1e}, 0},
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{{0x70, 0x06}, 0},
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{{0x71, 0x80}, 0},
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{{0x70, 0x07}, 0}
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};
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for (i = 0; i < ARRAY_SIZE(start_commands); i++) {
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retval = jlj_write2(gspca_dev, start_commands[i].instruction);
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if (retval < 0)
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return retval;
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if (start_commands[i].ack_wanted)
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retval = jlj_read1(gspca_dev, response);
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if (retval < 0)
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return retval;
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}
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PDEBUG(D_ERR, "jlj_start retval is %d", retval);
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return retval;
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}
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static int jlj_stop(struct gspca_dev *gspca_dev)
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{
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int i;
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int retval;
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struct jlj_command stop_commands[] = {
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{{0x71, 0x00}, 0},
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{{0x70, 0x09}, 0},
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{{0x71, 0x80}, 0},
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{{0x70, 0x05}, 0}
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};
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for (i = 0; i < ARRAY_SIZE(stop_commands); i++) {
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retval = jlj_write2(gspca_dev, stop_commands[i].instruction);
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if (retval < 0)
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return retval;
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}
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return retval;
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}
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/* This function is called as a workqueue function and runs whenever the camera
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* is streaming data. Because it is a workqueue function it is allowed to sleep
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* so we can use synchronous USB calls. To avoid possible collisions with other
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* threads attempting to use the camera's USB interface the gspca usb_lock is
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* used when performing the one USB control operation inside the workqueue,
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* which tells the camera to close the stream. In practice the only thing
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* which needs to be protected against is the usb_set_interface call that
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* gspca makes during stream_off. Otherwise the camera doesn't provide any
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* controls that the user could try to change.
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*/
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static void jlj_dostream(struct work_struct *work)
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{
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struct sd *dev = container_of(work, struct sd, work_struct);
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struct gspca_dev *gspca_dev = &dev->gspca_dev;
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int blocks_left; /* 0x200-sized blocks remaining in current frame. */
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int size_in_blocks;
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int act_len;
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int packet_type;
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int ret;
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u8 *buffer;
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buffer = kmalloc(JEILINJ_MAX_TRANSFER, GFP_KERNEL | GFP_DMA);
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if (!buffer) {
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PDEBUG(D_ERR, "Couldn't allocate USB buffer");
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goto quit_stream;
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}
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while (gspca_dev->present && gspca_dev->streaming) {
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/*
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* Now request data block 0. Line 0 reports the size
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* to download, in blocks of size 0x200, and also tells the
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* "actual" data size, in bytes, which seems best to ignore.
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*/
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ret = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x82),
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buffer, JEILINJ_MAX_TRANSFER, &act_len,
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JEILINJ_DATA_TIMEOUT);
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PDEBUG(D_STREAM,
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"Got %d bytes out of %d for Block 0",
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act_len, JEILINJ_MAX_TRANSFER);
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if (ret < 0 || act_len < FRAME_HEADER_LEN)
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goto quit_stream;
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size_in_blocks = buffer[0x0a];
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blocks_left = buffer[0x0a] - 1;
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PDEBUG(D_STREAM, "blocks_left = 0x%x", blocks_left);
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2009-10-09 06:58:35 +00:00
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/* Start a new frame, and add the JPEG header, first thing */
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2009-11-13 12:21:03 +00:00
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gspca_frame_add(gspca_dev, FIRST_PACKET,
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dev->jpeg_hdr, JPEG_HDR_SZ);
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/* Toss line 0 of data block 0, keep the rest. */
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gspca_frame_add(gspca_dev, INTER_PACKET,
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buffer + FRAME_HEADER_LEN,
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2009-08-03 07:13:23 +00:00
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JEILINJ_MAX_TRANSFER - FRAME_HEADER_LEN);
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2009-11-13 12:21:03 +00:00
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2009-08-03 07:13:23 +00:00
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while (blocks_left > 0) {
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if (!gspca_dev->present)
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goto quit_stream;
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ret = usb_bulk_msg(gspca_dev->dev,
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usb_rcvbulkpipe(gspca_dev->dev, 0x82),
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buffer, JEILINJ_MAX_TRANSFER, &act_len,
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JEILINJ_DATA_TIMEOUT);
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if (ret < 0 || act_len < JEILINJ_MAX_TRANSFER)
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goto quit_stream;
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PDEBUG(D_STREAM,
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"%d blocks remaining for frame", blocks_left);
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blocks_left -= 1;
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if (blocks_left == 0)
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packet_type = LAST_PACKET;
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else
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packet_type = INTER_PACKET;
|
2009-11-13 12:21:03 +00:00
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gspca_frame_add(gspca_dev, packet_type,
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buffer, JEILINJ_MAX_TRANSFER);
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2009-08-03 07:13:23 +00:00
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}
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}
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quit_stream:
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mutex_lock(&gspca_dev->usb_lock);
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if (gspca_dev->present)
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jlj_stop(gspca_dev);
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mutex_unlock(&gspca_dev->usb_lock);
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kfree(buffer);
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}
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/* This function is called at probe time just before sd_init */
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static int sd_config(struct gspca_dev *gspca_dev,
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const struct usb_device_id *id)
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{
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struct cam *cam = &gspca_dev->cam;
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struct sd *dev = (struct sd *) gspca_dev;
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dev->quality = 85;
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dev->jpegqual = 85;
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PDEBUG(D_PROBE,
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"JEILINJ camera detected"
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" (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
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cam->cam_mode = jlj_mode;
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cam->nmodes = 1;
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cam->bulk = 1;
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/* We don't use the buffer gspca allocates so make it small. */
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cam->bulk_size = 32;
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INIT_WORK(&dev->work_struct, jlj_dostream);
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return 0;
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}
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/* called on streamoff with alt==0 and on disconnect */
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/* the usb_lock is held at entry - restore on exit */
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static void sd_stop0(struct gspca_dev *gspca_dev)
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{
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struct sd *dev = (struct sd *) gspca_dev;
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/* wait for the work queue to terminate */
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mutex_unlock(&gspca_dev->usb_lock);
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/* This waits for jlj_dostream to finish */
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destroy_workqueue(dev->work_thread);
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dev->work_thread = NULL;
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mutex_lock(&gspca_dev->usb_lock);
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kfree(dev->jpeg_hdr);
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}
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/* this function is called at probe and resume time */
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static int sd_init(struct gspca_dev *gspca_dev)
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|
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{
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return 0;
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}
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/* Set up for getting frames. */
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static int sd_start(struct gspca_dev *gspca_dev)
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{
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struct sd *dev = (struct sd *) gspca_dev;
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|
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int ret;
|
|
|
|
|
|
|
|
/* create the JPEG header */
|
|
|
|
dev->jpeg_hdr = kmalloc(JPEG_HDR_SZ, GFP_KERNEL);
|
2009-09-18 23:33:27 +00:00
|
|
|
if (dev->jpeg_hdr == NULL)
|
|
|
|
return -ENOMEM;
|
2009-08-03 07:13:23 +00:00
|
|
|
jpeg_define(dev->jpeg_hdr, gspca_dev->height, gspca_dev->width,
|
|
|
|
0x21); /* JPEG 422 */
|
|
|
|
jpeg_set_qual(dev->jpeg_hdr, dev->quality);
|
|
|
|
PDEBUG(D_STREAM, "Start streaming at 320x240");
|
|
|
|
ret = jlj_start(gspca_dev);
|
|
|
|
if (ret < 0) {
|
|
|
|
PDEBUG(D_ERR, "Start streaming command failed");
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
/* Start the workqueue function to do the streaming */
|
|
|
|
dev->work_thread = create_singlethread_workqueue(MODULE_NAME);
|
|
|
|
queue_work(dev->work_thread, &dev->work_struct);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Table of supported USB devices */
|
|
|
|
static const __devinitdata struct usb_device_id device_table[] = {
|
|
|
|
{USB_DEVICE(0x0979, 0x0280)},
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DEVICE_TABLE(usb, device_table);
|
|
|
|
|
|
|
|
/* sub-driver description */
|
|
|
|
static const struct sd_desc sd_desc = {
|
|
|
|
.name = MODULE_NAME,
|
|
|
|
.config = sd_config,
|
|
|
|
.init = sd_init,
|
|
|
|
.start = sd_start,
|
|
|
|
.stop0 = sd_stop0,
|
|
|
|
};
|
|
|
|
|
|
|
|
/* -- device connect -- */
|
|
|
|
static int sd_probe(struct usb_interface *intf,
|
|
|
|
const struct usb_device_id *id)
|
|
|
|
{
|
|
|
|
return gspca_dev_probe(intf, id,
|
|
|
|
&sd_desc,
|
|
|
|
sizeof(struct sd),
|
|
|
|
THIS_MODULE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct usb_driver sd_driver = {
|
|
|
|
.name = MODULE_NAME,
|
|
|
|
.id_table = device_table,
|
|
|
|
.probe = sd_probe,
|
|
|
|
.disconnect = gspca_disconnect,
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
.suspend = gspca_suspend,
|
|
|
|
.resume = gspca_resume,
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
/* -- module insert / remove -- */
|
|
|
|
static int __init sd_mod_init(void)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = usb_register(&sd_driver);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
PDEBUG(D_PROBE, "registered");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit sd_mod_exit(void)
|
|
|
|
{
|
|
|
|
usb_deregister(&sd_driver);
|
|
|
|
PDEBUG(D_PROBE, "deregistered");
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(sd_mod_init);
|
|
|
|
module_exit(sd_mod_exit);
|