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authorLuca Risolia <luca.risolia@studio.unibo.it>2006-01-10 21:06:59 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-31 20:23:39 -0500
commit7ce08c93e388922e25a96a7d9895784182e4c72c (patch)
treea76883260255bd2d287dd9b5358e56cdddd11158
parentcd6fcc555fe278263880abdb93352ab205099db9 (diff)
[PATCH] USB: Add ET61X[12]51 Video4Linux2 driver
This patch adds a Video4Linux2 driver giving support to ET61X151 and ET61X251 PC Camera Controllers made by Etoms Electronics. Signed-off-by: Luca Risolia <luca.risolia@studio.unibo.it> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat
-rw-r--r--Documentation/usb/et61x251.txt306
-rw-r--r--MAINTAINERS10
-rw-r--r--drivers/usb/Makefile1
-rw-r--r--drivers/usb/media/Kconfig17
-rw-r--r--drivers/usb/media/Makefile2
-rw-r--r--drivers/usb/media/et61x251.h220
-rw-r--r--drivers/usb/media/et61x251_core.c2605
-rw-r--r--drivers/usb/media/et61x251_sensor.h115
-rw-r--r--drivers/usb/media/et61x251_tas5130d1b.c137
-rw-r--r--include/linux/videodev2.h1
10 files changed, 3412 insertions, 2 deletions
diff --git a/Documentation/usb/et61x251.txt b/Documentation/usb/et61x251.txt
new file mode 100644
index 00000000000..b44dda407ce
--- /dev/null
+++ b/Documentation/usb/et61x251.txt
@@ -0,0 +1,306 @@
1
2 ET61X[12]51 PC Camera Controllers
3 Driver for Linux
4 =================================
5
6 - Documentation -
7
8
9Index
10=====
111. Copyright
122. Disclaimer
133. License
144. Overview and features
155. Module dependencies
166. Module loading
177. Module parameters
188. Optional device control through "sysfs"
199. Supported devices
2010. Notes for V4L2 application developers
2111. Contact information
22
23
241. Copyright
25============
26Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it>
27
28
292. Disclaimer
30=============
31Etoms is a trademark of Etoms Electronics Corp.
32This software is not developed or sponsored by Etoms Electronics.
33
34
353. License
36==========
37This program is free software; you can redistribute it and/or modify
38it under the terms of the GNU General Public License as published by
39the Free Software Foundation; either version 2 of the License, or
40(at your option) any later version.
41
42This program is distributed in the hope that it will be useful,
43but WITHOUT ANY WARRANTY; without even the implied warranty of
44MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
45GNU General Public License for more details.
46
47You should have received a copy of the GNU General Public License
48along with this program; if not, write to the Free Software
49Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
50
51
524. Overview and features
53========================
54This driver supports the video interface of the devices mounting the ET61X151
55or ET61X251 PC Camera Controllers.
56
57It's worth to note that Etoms Electronics has never collaborated with the
58author during the development of this project; despite several requests,
59Etoms Electronics also refused to release enough detailed specifications of
60the video compression engine.
61
62The driver relies on the Video4Linux2 and USB core modules. It has been
63designed to run properly on SMP systems as well.
64
65The latest version of the ET61X[12]51 driver can be found at the following URL:
66http://www.linux-projects.org/
67
68Some of the features of the driver are:
69
70- full compliance with the Video4Linux2 API (see also "Notes for V4L2
71 application developers" paragraph);
72- available mmap or read/poll methods for video streaming through isochronous
73 data transfers;
74- automatic detection of image sensor;
75- support for any window resolutions and optional panning within the maximum
76 pixel area of image sensor;
77- image downscaling with arbitrary scaling factors from 1 and 2 in both
78 directions (see "Notes for V4L2 application developers" paragraph);
79- two different video formats for uncompressed or compressed data in low or
80 high compression quality (see also "Notes for V4L2 application developers"
81 paragraph);
82- full support for the capabilities of every possible image sensors that can
83 be connected to the ET61X[12]51 bridges, including, for istance, red, green,
84 blue and global gain adjustments and exposure control (see "Supported
85 devices" paragraph for details);
86- use of default color settings for sunlight conditions;
87- dynamic I/O interface for both ET61X[12]51 and image sensor control (see
88 "Optional device control through 'sysfs'" paragraph);
89- dynamic driver control thanks to various module parameters (see "Module
90 parameters" paragraph);
91- up to 64 cameras can be handled at the same time; they can be connected and
92 disconnected from the host many times without turning off the computer, if
93 the system supports hotplugging;
94- no known bugs.
95
96
975. Module dependencies
98======================
99For it to work properly, the driver needs kernel support for Video4Linux and
100USB.
101
102The following options of the kernel configuration file must be enabled and
103corresponding modules must be compiled:
104
105 # Multimedia devices
106 #
107 CONFIG_VIDEO_DEV=m
108
109To enable advanced debugging functionality on the device through /sysfs:
110
111 # Multimedia devices
112 #
113 CONFIG_VIDEO_ADV_DEBUG=y
114
115 # USB support
116 #
117 CONFIG_USB=m
118
119In addition, depending on the hardware being used, the modules below are
120necessary:
121
122 # USB Host Controller Drivers
123 #
124 CONFIG_USB_EHCI_HCD=m
125 CONFIG_USB_UHCI_HCD=m
126 CONFIG_USB_OHCI_HCD=m
127
128And finally:
129
130 # USB Multimedia devices
131 #
132 CONFIG_USB_ET61X251=m
133
134
1356. Module loading
136=================
137To use the driver, it is necessary to load the "et61x251" module into memory
138after every other module required: "videodev", "usbcore" and, depending on
139the USB host controller you have, "ehci-hcd", "uhci-hcd" or "ohci-hcd".
140
141Loading can be done as shown below:
142
143 [root@localhost home]# modprobe et61x251
144
145At this point the devices should be recognized. You can invoke "dmesg" to
146analyze kernel messages and verify that the loading process has gone well:
147
148 [user@localhost home]$ dmesg
149
150
1517. Module parameters
152====================
153Module parameters are listed below:
154-------------------------------------------------------------------------------
155Name: video_nr
156Type: short array (min = 0, max = 64)
157Syntax: <-1|n[,...]>
158Description: Specify V4L2 minor mode number:
159 -1 = use next available
160 n = use minor number n
161 You can specify up to 64 cameras this way.
162 For example:
163 video_nr=-1,2,-1 would assign minor number 2 to the second
164 registered camera and use auto for the first one and for every
165 other camera.
166Default: -1
167-------------------------------------------------------------------------------
168Name: force_munmap
169Type: bool array (min = 0, max = 64)
170Syntax: <0|1[,...]>
171Description: Force the application to unmap previously mapped buffer memory
172 before calling any VIDIOC_S_CROP or VIDIOC_S_FMT ioctl's. Not
173 all the applications support this feature. This parameter is
174 specific for each detected camera.
175 0 = do not force memory unmapping
176 1 = force memory unmapping (save memory)
177Default: 0
178-------------------------------------------------------------------------------
179Name: debug
180Type: ushort
181Syntax: <n>
182Description: Debugging information level, from 0 to 3:
183 0 = none (use carefully)
184 1 = critical errors
185 2 = significant informations
186 3 = more verbose messages
187 Level 3 is useful for testing only, when only one device
188 is used at the same time. It also shows some more informations
189 about the hardware being detected. This module parameter can be
190 changed at runtime thanks to the /sys filesystem interface.
191Default: 2
192-------------------------------------------------------------------------------
193
194
1958. Optional device control through "sysfs"
196==========================================
197If the kernel has been compiled with the CONFIG_VIDEO_ADV_DEBUG option enabled,
198it is possible to read and write both the ET61X[12]51 and the image sensor
199registers by using the "sysfs" filesystem interface.
200
201There are four files in the /sys/class/video4linux/videoX directory for each
202registered camera: "reg", "val", "i2c_reg" and "i2c_val". The first two files
203control the ET61X[12]51 bridge, while the other two control the sensor chip.
204"reg" and "i2c_reg" hold the values of the current register index where the
205following reading/writing operations are addressed at through "val" and
206"i2c_val". Their use is not intended for end-users, unless you know what you
207are doing. Remember that you must be logged in as root before writing to them.
208
209As an example, suppose we were to want to read the value contained in the
210register number 1 of the sensor register table - which is usually the product
211identifier - of the camera registered as "/dev/video0":
212
213 [root@localhost #] cd /sys/class/video4linux/video0
214 [root@localhost #] echo 1 > i2c_reg
215 [root@localhost #] cat i2c_val
216
217Note that if the sensor registers can not be read, "cat" will fail.
218To avoid race conditions, all the I/O accesses to the files are serialized.
219
220
2219. Supported devices
222====================
223None of the names of the companies as well as their products will be mentioned
224here. They have never collaborated with the author, so no advertising.
225
226From the point of view of a driver, what unambiguously identify a device are
227its vendor and product USB identifiers. Below is a list of known identifiers of
228devices mounting the ET61X[12]51 PC camera controllers:
229
230Vendor ID Product ID
231--------- ----------
2320x102c 0x6151
2330x102c 0x6251
2340x102c 0x6253
2350x102c 0x6254
2360x102c 0x6255
2370x102c 0x6256
2380x102c 0x6257
2390x102c 0x6258
2400x102c 0x6259
2410x102c 0x625a
2420x102c 0x625b
2430x102c 0x625c
2440x102c 0x625d
2450x102c 0x625e
2460x102c 0x625f
2470x102c 0x6260
2480x102c 0x6261
2490x102c 0x6262
2500x102c 0x6263
2510x102c 0x6264
2520x102c 0x6265
2530x102c 0x6266
2540x102c 0x6267
2550x102c 0x6268
2560x102c 0x6269
257
258The following image sensors are supported:
259
260Model Manufacturer
261----- ------------
262TAS5130D1B Taiwan Advanced Sensor Corporation
263
264All the available control settings of each image sensor are supported through
265the V4L2 interface.
266
267
26810. Notes for V4L2 application developers
269========================================
270This driver follows the V4L2 API specifications. In particular, it enforces two
271rules:
272
273- exactly one I/O method, either "mmap" or "read", is associated with each
274file descriptor. Once it is selected, the application must close and reopen the
275device to switch to the other I/O method;
276
277- although it is not mandatory, previously mapped buffer memory should always
278be unmapped before calling any "VIDIOC_S_CROP" or "VIDIOC_S_FMT" ioctl's.
279The same number of buffers as before will be allocated again to match the size
280of the new video frames, so you have to map the buffers again before any I/O
281attempts on them.
282
283Consistently with the hardware limits, this driver also supports image
284downscaling with arbitrary scaling factors from 1 and 2 in both directions.
285However, the V4L2 API specifications don't correctly define how the scaling
286factor can be chosen arbitrarily by the "negotiation" of the "source" and
287"target" rectangles. To work around this flaw, we have added the convention
288that, during the negotiation, whenever the "VIDIOC_S_CROP" ioctl is issued, the
289scaling factor is restored to 1.
290
291This driver supports two different video formats: the first one is the "8-bit
292Sequential Bayer" format and can be used to obtain uncompressed video data
293from the device through the current I/O method, while the second one provides
294"raw" compressed video data (without frame headers not related to the
295compressed data). The current compression quality may vary from 0 to 1 and can
296be selected or queried thanks to the VIDIOC_S_JPEGCOMP and VIDIOC_G_JPEGCOMP
297V4L2 ioctl's.
298
299
30011. Contact information
301=======================
302The author may be contacted by e-mail at <luca.risolia@studio.unibo.it>.
303
304GPG/PGP encrypted e-mail's are accepted. The GPG key ID of the author is
305'FCE635A4'; the public 1024-bit key should be available at any keyserver;
306the fingerprint is: '88E8 F32F 7244 68BA 3958 5D40 99DA 5D2A FCE6 35A4'.
diff --git a/MAINTAINERS b/MAINTAINERS
index a37a2b38a55..42955fe1ffa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2673,6 +2673,14 @@ M: dbrownell@users.sourceforge.net
2673L: linux-usb-devel@lists.sourceforge.net 2673L: linux-usb-devel@lists.sourceforge.net
2674S: Maintained 2674S: Maintained
2675 2675
2676USB ET61X[12]51 DRIVER
2677P: Luca Risolia
2678M: luca.risolia@studio.unibo.it
2679L: linux-usb-devel@lists.sourceforge.net
2680L: video4linux-list@redhat.com
2681W: http://www.linux-projects.org
2682S: Maintained
2683
2676USB HID/HIDBP DRIVERS 2684USB HID/HIDBP DRIVERS
2677P: Vojtech Pavlik 2685P: Vojtech Pavlik
2678M: vojtech@suse.cz 2686M: vojtech@suse.cz
@@ -2836,6 +2844,7 @@ USB SN9C10x DRIVER
2836P: Luca Risolia 2844P: Luca Risolia
2837M: luca.risolia@studio.unibo.it 2845M: luca.risolia@studio.unibo.it
2838L: linux-usb-devel@lists.sourceforge.net 2846L: linux-usb-devel@lists.sourceforge.net
2847L: video4linux-list@redhat.com
2839W: http://www.linux-projects.org 2848W: http://www.linux-projects.org
2840S: Maintained 2849S: Maintained
2841 2850
@@ -2865,6 +2874,7 @@ USB W996[87]CF DRIVER
2865P: Luca Risolia 2874P: Luca Risolia
2866M: luca.risolia@studio.unibo.it 2875M: luca.risolia@studio.unibo.it
2867L: linux-usb-devel@lists.sourceforge.net 2876L: linux-usb-devel@lists.sourceforge.net
2877L: video4linux-list@redhat.com
2868W: http://www.linux-projects.org 2878W: http://www.linux-projects.org
2869S: Maintained 2879S: Maintained
2870 2880
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 3639c3f8d35..36e476dd912 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_USB_XPAD) += input/
38 38
39obj-$(CONFIG_USB_DABUSB) += media/ 39obj-$(CONFIG_USB_DABUSB) += media/
40obj-$(CONFIG_USB_DSBR) += media/ 40obj-$(CONFIG_USB_DSBR) += media/
41obj-$(CONFIG_USB_ET61X251) += media/
41obj-$(CONFIG_USB_IBMCAM) += media/ 42obj-$(CONFIG_USB_IBMCAM) += media/
42obj-$(CONFIG_USB_KONICAWC) += media/ 43obj-$(CONFIG_USB_KONICAWC) += media/
43obj-$(CONFIG_USB_OV511) += media/ 44obj-$(CONFIG_USB_OV511) += media/
diff --git a/drivers/usb/media/Kconfig b/drivers/usb/media/Kconfig
index 21232ee2974..0d3d2cc5d7b 100644
--- a/drivers/usb/media/Kconfig
+++ b/drivers/usb/media/Kconfig
@@ -53,6 +53,21 @@ config USB_DSBR
53 To compile this driver as a module, choose M here: the 53 To compile this driver as a module, choose M here: the
54 module will be called dsbr100. 54 module will be called dsbr100.
55 55
56config USB_ET61X251
57 tristate "USB ET61X[12]51 PC Camera Controller support"
58 depends on USB && VIDEO_DEV
59 ---help---
60 Say Y here if you want support for cameras based on Etoms ET61X151
61 or ET61X251 PC Camera Controllers.
62
63 See <file:Documentation/usb/et61x251.txt> for more informations.
64
65 This driver uses the Video For Linux API. You must say Y or M to
66 "Video For Linux" to use this driver.
67
68 To compile this driver as a module, choose M here: the
69 module will be called et61x251.
70
56config USB_IBMCAM 71config USB_IBMCAM
57 tristate "USB IBM (Xirlink) C-it Camera support" 72 tristate "USB IBM (Xirlink) C-it Camera support"
58 depends on USB && VIDEO_DEV 73 depends on USB && VIDEO_DEV
@@ -209,5 +224,3 @@ config USB_PWC
209 224
210 To compile this driver as a module, choose M here: the 225 To compile this driver as a module, choose M here: the
211 module will be called pwc. 226 module will be called pwc.
212
213
diff --git a/drivers/usb/media/Makefile b/drivers/usb/media/Makefile
index d83adffa925..3957aa1be0f 100644
--- a/drivers/usb/media/Makefile
+++ b/drivers/usb/media/Makefile
@@ -3,9 +3,11 @@
3# 3#
4 4
5sn9c102-objs := sn9c102_core.o sn9c102_hv7131d.o sn9c102_mi0343.o sn9c102_ov7630.o sn9c102_pas106b.o sn9c102_pas202bcb.o sn9c102_tas5110c1b.o sn9c102_tas5130d1b.o 5sn9c102-objs := sn9c102_core.o sn9c102_hv7131d.o sn9c102_mi0343.o sn9c102_ov7630.o sn9c102_pas106b.o sn9c102_pas202bcb.o sn9c102_tas5110c1b.o sn9c102_tas5130d1b.o
6et61x251-objs := et61x251_core.o et61x251_tas5130d1b.o
6 7
7obj-$(CONFIG_USB_DABUSB) += dabusb.o 8obj-$(CONFIG_USB_DABUSB) += dabusb.o
8obj-$(CONFIG_USB_DSBR) += dsbr100.o 9obj-$(CONFIG_USB_DSBR) += dsbr100.o
10obj-$(CONFIG_USB_ET61X251) += et61x251.o
9obj-$(CONFIG_USB_IBMCAM) += ibmcam.o usbvideo.o ultracam.o 11obj-$(CONFIG_USB_IBMCAM) += ibmcam.o usbvideo.o ultracam.o
10obj-$(CONFIG_USB_KONICAWC) += konicawc.o usbvideo.o 12obj-$(CONFIG_USB_KONICAWC) += konicawc.o usbvideo.o
11obj-$(CONFIG_USB_OV511) += ov511.o 13obj-$(CONFIG_USB_OV511) += ov511.o
diff --git a/drivers/usb/media/et61x251.h b/drivers/usb/media/et61x251.h
new file mode 100644
index 00000000000..652238f329f
--- /dev/null
+++ b/drivers/usb/media/et61x251.h
@@ -0,0 +1,220 @@
1/***************************************************************************
2 * V4L2 driver for ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21#ifndef _ET61X251_H_
22#define _ET61X251_H_
23
24#include <linux/version.h>
25#include <linux/usb.h>
26#include <linux/videodev2.h>
27#include <media/v4l2-common.h>
28#include <linux/device.h>
29#include <linux/list.h>
30#include <linux/spinlock.h>
31#include <linux/time.h>
32#include <linux/wait.h>
33#include <linux/types.h>
34#include <linux/param.h>
35#include <linux/rwsem.h>
36#include <asm/semaphore.h>
37
38#include "et61x251_sensor.h"
39
40/*****************************************************************************/
41
42#define ET61X251_DEBUG
43#define ET61X251_DEBUG_LEVEL 2
44#define ET61X251_MAX_DEVICES 64
45#define ET61X251_PRESERVE_IMGSCALE 0
46#define ET61X251_FORCE_MUNMAP 0
47#define ET61X251_MAX_FRAMES 32
48#define ET61X251_COMPRESSION_QUALITY 0
49#define ET61X251_URBS 2
50#define ET61X251_ISO_PACKETS 7
51#define ET61X251_ALTERNATE_SETTING 13
52#define ET61X251_URB_TIMEOUT msecs_to_jiffies(2 * ET61X251_ISO_PACKETS)
53#define ET61X251_CTRL_TIMEOUT 100
54
55/*****************************************************************************/
56
57static const struct usb_device_id et61x251_id_table[] = {
58 { USB_DEVICE(0x102c, 0x6151), },
59 { USB_DEVICE(0x102c, 0x6251), },
60 { USB_DEVICE(0x102c, 0x6253), },
61 { USB_DEVICE(0x102c, 0x6254), },
62 { USB_DEVICE(0x102c, 0x6255), },
63 { USB_DEVICE(0x102c, 0x6256), },
64 { USB_DEVICE(0x102c, 0x6257), },
65 { USB_DEVICE(0x102c, 0x6258), },
66 { USB_DEVICE(0x102c, 0x6259), },
67 { USB_DEVICE(0x102c, 0x625a), },
68 { USB_DEVICE(0x102c, 0x625b), },
69 { USB_DEVICE(0x102c, 0x625c), },
70 { USB_DEVICE(0x102c, 0x625d), },
71 { USB_DEVICE(0x102c, 0x625e), },
72 { USB_DEVICE(0x102c, 0x625f), },
73 { USB_DEVICE(0x102c, 0x6260), },
74 { USB_DEVICE(0x102c, 0x6261), },
75 { USB_DEVICE(0x102c, 0x6262), },
76 { USB_DEVICE(0x102c, 0x6263), },
77 { USB_DEVICE(0x102c, 0x6264), },
78 { USB_DEVICE(0x102c, 0x6265), },
79 { USB_DEVICE(0x102c, 0x6266), },
80 { USB_DEVICE(0x102c, 0x6267), },
81 { USB_DEVICE(0x102c, 0x6268), },
82 { USB_DEVICE(0x102c, 0x6269), },
83 { }
84};
85
86ET61X251_SENSOR_TABLE
87
88/*****************************************************************************/
89
90enum et61x251_frame_state {
91 F_UNUSED,
92 F_QUEUED,
93 F_GRABBING,
94 F_DONE,
95 F_ERROR,
96};
97
98struct et61x251_frame_t {
99 void* bufmem;
100 struct v4l2_buffer buf;
101 enum et61x251_frame_state state;
102 struct list_head frame;
103 unsigned long vma_use_count;
104};
105
106enum et61x251_dev_state {
107 DEV_INITIALIZED = 0x01,
108 DEV_DISCONNECTED = 0x02,
109 DEV_MISCONFIGURED = 0x04,
110};
111
112enum et61x251_io_method {
113 IO_NONE,
114 IO_READ,
115 IO_MMAP,
116};
117
118enum et61x251_stream_state {
119 STREAM_OFF,
120 STREAM_INTERRUPT,
121 STREAM_ON,
122};
123
124struct et61x251_sysfs_attr {
125 u8 reg, i2c_reg;
126};
127
128struct et61x251_module_param {
129 u8 force_munmap;
130};
131
132static DECLARE_MUTEX(et61x251_sysfs_lock);
133static DECLARE_RWSEM(et61x251_disconnect);
134
135struct et61x251_device {
136 struct video_device* v4ldev;
137
138 struct et61x251_sensor* sensor;
139
140 struct usb_device* usbdev;
141 struct urb* urb[ET61X251_URBS];
142 void* transfer_buffer[ET61X251_URBS];
143 u8* control_buffer;
144
145 struct et61x251_frame_t *frame_current, frame[ET61X251_MAX_FRAMES];
146 struct list_head inqueue, outqueue;
147 u32 frame_count, nbuffers, nreadbuffers;
148
149 enum et61x251_io_method io;
150 enum et61x251_stream_state stream;
151
152 struct v4l2_jpegcompression compression;
153
154 struct et61x251_sysfs_attr sysfs;
155 struct et61x251_module_param module_param;
156
157 enum et61x251_dev_state state;
158 u8 users;
159
160 struct semaphore dev_sem, fileop_sem;
161 spinlock_t queue_lock;
162 wait_queue_head_t open, wait_frame, wait_stream;
163};
164
165/*****************************************************************************/
166
167void
168et61x251_attach_sensor(struct et61x251_device* cam,
169 struct et61x251_sensor* sensor)
170{
171 cam->sensor = sensor;
172 cam->sensor->usbdev = cam->usbdev;
173}
174
175/*****************************************************************************/
176
177#undef DBG
178#undef KDBG
179#ifdef ET61X251_DEBUG
180# define DBG(level, fmt, args...) \
181do { \
182 if (debug >= (level)) { \
183 if ((level) == 1) \
184 dev_err(&cam->usbdev->dev, fmt "\n", ## args); \
185 else if ((level) == 2) \
186 dev_info(&cam->usbdev->dev, fmt "\n", ## args); \
187 else if ((level) >= 3) \
188 dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n", \
189 __FUNCTION__, __LINE__ , ## args); \
190 } \
191} while (0)
192# define KDBG(level, fmt, args...) \
193do { \
194 if (debug >= (level)) { \
195 if ((level) == 1 || (level) == 2) \
196 pr_info("et61x251: " fmt "\n", ## args); \
197 else if ((level) == 3) \
198 pr_debug("et61x251: [%s:%d] " fmt "\n", __FUNCTION__, \
199 __LINE__ , ## args); \
200 } \
201} while (0)
202# define V4LDBG(level, name, cmd) \
203do { \
204 if (debug >= (level)) \
205 v4l_print_ioctl(name, cmd); \
206} while (0)
207#else
208# define DBG(level, fmt, args...) do {;} while(0)
209# define KDBG(level, fmt, args...) do {;} while(0)
210# define V4LDBG(level, name, cmd) do {;} while(0)
211#endif
212
213#undef PDBG
214#define PDBG(fmt, args...) \
215dev_info(&cam->dev, "[%s:%d] " fmt "\n", __FUNCTION__, __LINE__ , ## args)
216
217#undef PDBGG
218#define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
219
220#endif /* _ET61X251_H_ */
diff --git a/drivers/usb/media/et61x251_core.c b/drivers/usb/media/et61x251_core.c
new file mode 100644
index 00000000000..2c0171a5ad6
--- /dev/null
+++ b/drivers/usb/media/et61x251_core.c
@@ -0,0 +1,2605 @@
1/***************************************************************************
2 * V4L2 driver for ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/param.h>
25#include <linux/moduleparam.h>
26#include <linux/errno.h>
27#include <linux/slab.h>
28#include <linux/string.h>
29#include <linux/device.h>
30#include <linux/fs.h>
31#include <linux/delay.h>
32#include <linux/stddef.h>
33#include <linux/compiler.h>
34#include <linux/ioctl.h>
35#include <linux/poll.h>
36#include <linux/stat.h>
37#include <linux/mm.h>
38#include <linux/vmalloc.h>
39#include <linux/page-flags.h>
40#include <linux/byteorder/generic.h>
41#include <asm/page.h>
42#include <asm/uaccess.h>
43
44#include "et61x251.h"
45
46/*****************************************************************************/
47
48#define ET61X251_MODULE_NAME "V4L2 driver for ET61X[12]51 " \
49 "PC Camera Controllers"
50#define ET61X251_MODULE_AUTHOR "(C) 2006 Luca Risolia"
51#define ET61X251_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
52#define ET61X251_MODULE_LICENSE "GPL"
53#define ET61X251_MODULE_VERSION "1:1.01"
54#define ET61X251_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 1)
55
56/*****************************************************************************/
57
58MODULE_DEVICE_TABLE(usb, et61x251_id_table);
59
60MODULE_AUTHOR(ET61X251_MODULE_AUTHOR " " ET61X251_AUTHOR_EMAIL);
61MODULE_DESCRIPTION(ET61X251_MODULE_NAME);
62MODULE_VERSION(ET61X251_MODULE_VERSION);
63MODULE_LICENSE(ET61X251_MODULE_LICENSE);
64
65static short video_nr[] = {[0 ... ET61X251_MAX_DEVICES-1] = -1};
66module_param_array(video_nr, short, NULL, 0444);
67MODULE_PARM_DESC(video_nr,
68 "\n<-1|n[,...]> Specify V4L2 minor mode number."
69 "\n -1 = use next available (default)"
70 "\n n = use minor number n (integer >= 0)"
71 "\nYou can specify up to "
72 __MODULE_STRING(ET61X251_MAX_DEVICES) " cameras this way."
73 "\nFor example:"
74 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
75 "\nthe second registered camera and use auto for the first"
76 "\none and for every other camera."
77 "\n");
78
79static short force_munmap[] = {[0 ... ET61X251_MAX_DEVICES-1] =
80 ET61X251_FORCE_MUNMAP};
81module_param_array(force_munmap, bool, NULL, 0444);
82MODULE_PARM_DESC(force_munmap,
83 "\n<0|1[,...]> Force the application to unmap previously"
84 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
85 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
86 "\nthis feature. This parameter is specific for each"
87 "\ndetected camera."
88 "\n 0 = do not force memory unmapping"
89 "\n 1 = force memory unmapping (save memory)"
90 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
91 "\n");
92
93#ifdef ET61X251_DEBUG
94static unsigned short debug = ET61X251_DEBUG_LEVEL;
95module_param(debug, ushort, 0644);
96MODULE_PARM_DESC(debug,
97 "\n<n> Debugging information level, from 0 to 3:"
98 "\n0 = none (use carefully)"
99 "\n1 = critical errors"
100 "\n2 = significant informations"
101 "\n3 = more verbose messages"
102 "\nLevel 3 is useful for testing only, when only "
103 "one device is used."
104 "\nDefault value is "__MODULE_STRING(ET61X251_DEBUG_LEVEL)"."
105 "\n");
106#endif
107
108/*****************************************************************************/
109
110static u32
111et61x251_request_buffers(struct et61x251_device* cam, u32 count,
112 enum et61x251_io_method io)
113{
114 struct v4l2_pix_format* p = &(cam->sensor->pix_format);
115 struct v4l2_rect* r = &(cam->sensor->cropcap.bounds);
116 const size_t imagesize = cam->module_param.force_munmap ||
117 io == IO_READ ?
118 (p->width * p->height * p->priv) / 8 :
119 (r->width * r->height * p->priv) / 8;
120 void* buff = NULL;
121 u32 i;
122
123 if (count > ET61X251_MAX_FRAMES)
124 count = ET61X251_MAX_FRAMES;
125
126 cam->nbuffers = count;
127 while (cam->nbuffers > 0) {
128 if ((buff = vmalloc_32(cam->nbuffers * PAGE_ALIGN(imagesize))))
129 break;
130 cam->nbuffers--;
131 }
132
133 for (i = 0; i < cam->nbuffers; i++) {
134 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
135 cam->frame[i].buf.index = i;
136 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
137 cam->frame[i].buf.length = imagesize;
138 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
139 cam->frame[i].buf.sequence = 0;
140 cam->frame[i].buf.field = V4L2_FIELD_NONE;
141 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
142 cam->frame[i].buf.flags = 0;
143 }
144
145 return cam->nbuffers;
146}
147
148
149static void et61x251_release_buffers(struct et61x251_device* cam)
150{
151 if (cam->nbuffers) {
152 vfree(cam->frame[0].bufmem);
153 cam->nbuffers = 0;
154 }
155 cam->frame_current = NULL;
156}
157
158
159static void et61x251_empty_framequeues(struct et61x251_device* cam)
160{
161 u32 i;
162
163 INIT_LIST_HEAD(&cam->inqueue);
164 INIT_LIST_HEAD(&cam->outqueue);
165
166 for (i = 0; i < ET61X251_MAX_FRAMES; i++) {
167 cam->frame[i].state = F_UNUSED;
168 cam->frame[i].buf.bytesused = 0;
169 }
170}
171
172
173static void et61x251_requeue_outqueue(struct et61x251_device* cam)
174{
175 struct et61x251_frame_t *i;
176
177 list_for_each_entry(i, &cam->outqueue, frame) {
178 i->state = F_QUEUED;
179 list_add(&i->frame, &cam->inqueue);
180 }
181
182 INIT_LIST_HEAD(&cam->outqueue);
183}
184
185
186static void et61x251_queue_unusedframes(struct et61x251_device* cam)
187{
188 unsigned long lock_flags;
189 u32 i;
190
191 for (i = 0; i < cam->nbuffers; i++)
192 if (cam->frame[i].state == F_UNUSED) {
193 cam->frame[i].state = F_QUEUED;
194 spin_lock_irqsave(&cam->queue_lock, lock_flags);
195 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
196 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
197 }
198}
199
200/*****************************************************************************/
201
202int et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
203{
204 struct usb_device* udev = cam->usbdev;
205 u8* buff = cam->control_buffer;
206 int res;
207
208 *buff = value;
209
210 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
211 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
212 if (res < 0) {
213 DBG(3, "Failed to write a register (value 0x%02X, index "
214 "0x%02X, error %d)", value, index, res);
215 return -1;
216 }
217
218 return 0;
219}
220
221
222int et61x251_read_reg(struct et61x251_device* cam, u16 index)
223{
224 struct usb_device* udev = cam->usbdev;
225 u8* buff = cam->control_buffer;
226 int res;
227
228 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
229 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
230 if (res < 0)
231 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
232 index, res);
233
234 return (res >= 0) ? (int)(*buff) : -1;
235}
236
237
238static int
239et61x251_i2c_wait(struct et61x251_device* cam, struct et61x251_sensor* sensor)
240{
241 int i, r;
242
243 for (i = 1; i <= 8; i++) {
244 if (sensor->interface == ET61X251_I2C_3WIRES) {
245 r = et61x251_read_reg(cam, 0x8e);
246 if (!(r & 0x02) && (r >= 0))
247 return 0;
248 } else {
249 r = et61x251_read_reg(cam, 0x8b);
250 if (!(r & 0x01) && (r >= 0))
251 return 0;
252 }
253 if (r < 0)
254 return -EIO;
255 udelay(8*8); /* minimum for sensors at 400kHz */
256 }
257
258 return -EBUSY;
259}
260
261
262int
263et61x251_i2c_try_read(struct et61x251_device* cam,
264 struct et61x251_sensor* sensor, u8 address)
265{
266 struct usb_device* udev = cam->usbdev;
267 u8* data = cam->control_buffer;
268 int err = 0, res;
269
270 data[0] = address;
271 data[1] = cam->sensor->i2c_slave_id;
272 data[2] = cam->sensor->rsta | 0x10;
273 data[3] = !(et61x251_read_reg(cam, 0x8b) & 0x02);
274 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
275 0, 0x88, data, 4, ET61X251_CTRL_TIMEOUT);
276 if (res < 0)
277 err += res;
278
279 err += et61x251_i2c_wait(cam, sensor);
280
281 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
282 0, 0x80, data, 8, ET61X251_CTRL_TIMEOUT);
283 if (res < 0)
284 err += res;
285
286 if (err)
287 DBG(3, "I2C read failed for %s image sensor", sensor->name);
288
289 PDBGG("I2C read: address 0x%02X, value: 0x%02X", address, data[0]);
290
291 return err ? -1 : (int)data[0];
292}
293
294
295int
296et61x251_i2c_try_write(struct et61x251_device* cam,
297 struct et61x251_sensor* sensor, u8 address, u8 value)
298{
299 struct usb_device* udev = cam->usbdev;
300 u8* data = cam->control_buffer;
301 int err = 0, res;
302
303 data[0] = address;
304 data[1] = cam->sensor->i2c_slave_id;
305 data[2] = cam->sensor->rsta | 0x12;
306 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
307 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
308 if (res < 0)
309 err += res;
310
311 data[0] = value;
312 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
313 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
314 if (res < 0)
315 err += res;
316
317 err += et61x251_i2c_wait(cam, sensor);
318
319 if (err)
320 DBG(3, "I2C write failed for %s image sensor", sensor->name);
321
322 PDBGG("I2C write: address 0x%02X, value: 0x%02X", address, value);
323
324 return err ? -1 : 0;
325}
326
327
328int
329et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
330 u8 data3, u8 data4, u8 data5, u8 data6, u8 data7,
331 u8 data8, u8 address)
332{
333 struct usb_device* udev = cam->usbdev;
334 u8* data = cam->control_buffer;
335 int err = 0, res;
336
337 if (!cam->sensor)
338 return -1;
339
340 data[0] = data2;
341 data[1] = data3;
342 data[2] = data4;
343 data[3] = data5;
344 data[4] = data6;
345 data[5] = data7;
346 data[6] = data8;
347 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
348 0, 0x81, data, n-1, ET61X251_CTRL_TIMEOUT);
349 if (res < 0)
350 err += res;
351
352 data[0] = address;
353 data[1] = cam->sensor->i2c_slave_id;
354 data[2] = cam->sensor->rsta | 0x02 | (n << 4);
355 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
356 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
357 if (res < 0)
358 err += res;
359
360 /* Start writing through the serial interface */
361 data[0] = data1;
362 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
363 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
364 if (res < 0)
365 err += res;
366
367 err += et61x251_i2c_wait(cam, cam->sensor);
368
369 if (err)
370 DBG(3, "I2C raw write failed for %s image sensor",
371 cam->sensor->name);
372
373 PDBGG("I2C raw write: %u bytes, address = 0x%02X, data1 = 0x%02X, "
374 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X,"
375 " data6 = 0x%02X, data7 = 0x%02X, data8 = 0x%02X", n, address,
376 data1, data2, data3, data4, data5, data6, data7, data8);
377
378 return err ? -1 : 0;
379
380}
381
382
383int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
384{
385 if (!cam->sensor)
386 return -1;
387
388 return et61x251_i2c_try_read(cam, cam->sensor, address);
389}
390
391
392int et61x251_i2c_write(struct et61x251_device* cam, u8 address, u8 value)
393{
394 if (!cam->sensor)
395 return -1;
396
397 return et61x251_i2c_try_write(cam, cam->sensor, address, value);
398}
399
400/*****************************************************************************/
401
402static void et61x251_urb_complete(struct urb *urb, struct pt_regs* regs)
403{
404 struct et61x251_device* cam = urb->context;
405 struct et61x251_frame_t** f;
406 size_t imagesize;
407 u8 i;
408 int err = 0;
409
410 if (urb->status == -ENOENT)
411 return;
412
413 f = &cam->frame_current;
414
415 if (cam->stream == STREAM_INTERRUPT) {
416 cam->stream = STREAM_OFF;
417 if ((*f))
418 (*f)->state = F_QUEUED;
419 DBG(3, "Stream interrupted");
420 wake_up_interruptible(&cam->wait_stream);
421 }
422
423 if (cam->state & DEV_DISCONNECTED)
424 return;
425
426 if (cam->state & DEV_MISCONFIGURED) {
427 wake_up_interruptible(&cam->wait_frame);
428 return;
429 }
430
431 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
432 goto resubmit_urb;
433
434 if (!(*f))
435 (*f) = list_entry(cam->inqueue.next, struct et61x251_frame_t,
436 frame);
437
438 imagesize = (cam->sensor->pix_format.width *
439 cam->sensor->pix_format.height *
440 cam->sensor->pix_format.priv) / 8;
441
442 for (i = 0; i < urb->number_of_packets; i++) {
443 unsigned int len, status;
444 void *pos;
445 u8* b1, * b2, sof;
446 const u8 VOID_BYTES = 6;
447 size_t imglen;
448
449 len = urb->iso_frame_desc[i].actual_length;
450 status = urb->iso_frame_desc[i].status;
451 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
452
453 if (status) {
454 DBG(3, "Error in isochronous frame");
455 (*f)->state = F_ERROR;
456 continue;
457 }
458
459 b1 = pos++;
460 b2 = pos++;
461 sof = ((*b1 & 0x3f) == 63);
462 imglen = ((*b1 & 0xc0) << 2) | *b2;
463
464 PDBGG("Isochrnous frame: length %u, #%u i, image length %zu",
465 len, i, imglen);
466
467 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
468start_of_frame:
469 if (sof) {
470 (*f)->state = F_GRABBING;
471 (*f)->buf.bytesused = 0;
472 do_gettimeofday(&(*f)->buf.timestamp);
473 pos += 22;
474 DBG(3, "SOF detected: new video frame");
475 }
476
477 if ((*f)->state == F_GRABBING) {
478 if (sof && (*f)->buf.bytesused) {
479 if (cam->sensor->pix_format.pixelformat ==
480 V4L2_PIX_FMT_ET61X251)
481 goto end_of_frame;
482 else {
483 DBG(3, "Not expected SOF detected "
484 "after %lu bytes",
485 (unsigned long)(*f)->buf.bytesused);
486 (*f)->state = F_ERROR;
487 continue;
488 }
489 }
490
491 if ((*f)->buf.bytesused + imglen > imagesize) {
492 DBG(3, "Video frame size exceeded");
493 (*f)->state = F_ERROR;
494 continue;
495 }
496
497 pos += VOID_BYTES;
498
499 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, imglen);
500 (*f)->buf.bytesused += imglen;
501
502 if ((*f)->buf.bytesused == imagesize) {
503 u32 b;
504end_of_frame:
505 b = (*f)->buf.bytesused;
506 (*f)->state = F_DONE;
507 (*f)->buf.sequence= ++cam->frame_count;
508 spin_lock(&cam->queue_lock);
509 list_move_tail(&(*f)->frame, &cam->outqueue);
510 if (!list_empty(&cam->inqueue))
511 (*f) = list_entry(cam->inqueue.next,
512 struct et61x251_frame_t,
513 frame);
514 else
515 (*f) = NULL;
516 spin_unlock(&cam->queue_lock);
517 DBG(3, "Video frame captured: : %lu bytes",
518 (unsigned long)(b));
519
520 if (!(*f))
521 goto resubmit_urb;
522
523 if (sof &&
524 cam->sensor->pix_format.pixelformat ==
525 V4L2_PIX_FMT_ET61X251)
526 goto start_of_frame;
527 }
528 }
529 }
530
531resubmit_urb:
532 urb->dev = cam->usbdev;
533 err = usb_submit_urb(urb, GFP_ATOMIC);
534 if (err < 0 && err != -EPERM) {
535 cam->state |= DEV_MISCONFIGURED;
536 DBG(1, "usb_submit_urb() failed");
537 }
538
539 wake_up_interruptible(&cam->wait_frame);
540}
541
542
543static int et61x251_start_transfer(struct et61x251_device* cam)
544{
545 struct usb_device *udev = cam->usbdev;
546 struct urb* urb;
547 const unsigned int wMaxPacketSize[] = {0, 256, 384, 512, 640, 768, 832,
548 864, 896, 920, 956, 980, 1000,
549 1022};
550 const unsigned int psz = wMaxPacketSize[ET61X251_ALTERNATE_SETTING];
551 s8 i, j;
552 int err = 0;
553
554 for (i = 0; i < ET61X251_URBS; i++) {
555 cam->transfer_buffer[i] = kzalloc(ET61X251_ISO_PACKETS * psz,
556 GFP_KERNEL);
557 if (!cam->transfer_buffer[i]) {
558 err = -ENOMEM;
559 DBG(1, "Not enough memory");
560 goto free_buffers;
561 }
562 }
563
564 for (i = 0; i < ET61X251_URBS; i++) {
565 urb = usb_alloc_urb(ET61X251_ISO_PACKETS, GFP_KERNEL);
566 cam->urb[i] = urb;
567 if (!urb) {
568 err = -ENOMEM;
569 DBG(1, "usb_alloc_urb() failed");
570 goto free_urbs;
571 }
572 urb->dev = udev;
573 urb->context = cam;
574 urb->pipe = usb_rcvisocpipe(udev, 1);
575 urb->transfer_flags = URB_ISO_ASAP;
576 urb->number_of_packets = ET61X251_ISO_PACKETS;
577 urb->complete = et61x251_urb_complete;
578 urb->transfer_buffer = cam->transfer_buffer[i];
579 urb->transfer_buffer_length = psz * ET61X251_ISO_PACKETS;
580 urb->interval = 1;
581 for (j = 0; j < ET61X251_ISO_PACKETS; j++) {
582 urb->iso_frame_desc[j].offset = psz * j;
583 urb->iso_frame_desc[j].length = psz;
584 }
585 }
586
587 err = et61x251_write_reg(cam, 0x01, 0x03);
588 err = et61x251_write_reg(cam, 0x00, 0x03);
589 err = et61x251_write_reg(cam, 0x08, 0x03);
590 if (err) {
591 err = -EIO;
592 DBG(1, "I/O hardware error");
593 goto free_urbs;
594 }
595
596 err = usb_set_interface(udev, 0, ET61X251_ALTERNATE_SETTING);
597 if (err) {
598 DBG(1, "usb_set_interface() failed");
599 goto free_urbs;
600 }
601
602 cam->frame_current = NULL;
603
604 for (i = 0; i < ET61X251_URBS; i++) {
605 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
606 if (err) {
607 for (j = i-1; j >= 0; j--)
608 usb_kill_urb(cam->urb[j]);
609 DBG(1, "usb_submit_urb() failed, error %d", err);
610 goto free_urbs;
611 }
612 }
613
614 return 0;
615
616free_urbs:
617 for (i = 0; (i < ET61X251_URBS) && cam->urb[i]; i++)
618 usb_free_urb(cam->urb[i]);
619
620free_buffers:
621 for (i = 0; (i < ET61X251_URBS) && cam->transfer_buffer[i]; i++)
622 kfree(cam->transfer_buffer[i]);
623
624 return err;
625}
626
627
628static int et61x251_stop_transfer(struct et61x251_device* cam)
629{
630 struct usb_device *udev = cam->usbdev;
631 s8 i;
632 int err = 0;
633
634 if (cam->state & DEV_DISCONNECTED)
635 return 0;
636
637 for (i = ET61X251_URBS-1; i >= 0; i--) {
638 usb_kill_urb(cam->urb[i]);
639 usb_free_urb(cam->urb[i]);
640 kfree(cam->transfer_buffer[i]);
641 }
642
643 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
644 if (err)
645 DBG(3, "usb_set_interface() failed");
646
647 return err;
648}
649
650
651static int et61x251_stream_interrupt(struct et61x251_device* cam)
652{
653 int err = 0;
654
655 cam->stream = STREAM_INTERRUPT;
656 err = wait_event_timeout(cam->wait_stream,
657 (cam->stream == STREAM_OFF) ||
658 (cam->state & DEV_DISCONNECTED),
659 ET61X251_URB_TIMEOUT);
660 if (cam->state & DEV_DISCONNECTED)
661 return -ENODEV;
662 else if (err) {
663 cam->state |= DEV_MISCONFIGURED;
664 DBG(1, "URB timeout reached. The camera is misconfigured. To "
665 "use it, close and open /dev/video%d again.",
666 cam->v4ldev->minor);
667 return err;
668 }
669
670 return 0;
671}
672
673/*****************************************************************************/
674
675#ifdef CONFIG_VIDEO_ADV_DEBUG
676static u8 et61x251_strtou8(const char* buff, size_t len, ssize_t* count)
677{
678 char str[5];
679 char* endp;
680 unsigned long val;
681
682 if (len < 4) {
683 strncpy(str, buff, len);
684 str[len+1] = '\0';
685 } else {
686 strncpy(str, buff, 4);
687 str[4] = '\0';
688 }
689
690 val = simple_strtoul(str, &endp, 0);
691
692 *count = 0;
693 if (val <= 0xff)
694 *count = (ssize_t)(endp - str);
695 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
696 *count += 1;
697
698 return (u8)val;
699}
700
701/*
702 NOTE 1: being inside one of the following methods implies that the v4l
703 device exists for sure (see kobjects and reference counters)
704 NOTE 2: buffers are PAGE_SIZE long
705*/
706
707static ssize_t et61x251_show_reg(struct class_device* cd, char* buf)
708{
709 struct et61x251_device* cam;
710 ssize_t count;
711
712 if (down_interruptible(&et61x251_sysfs_lock))
713 return -ERESTARTSYS;
714
715 cam = video_get_drvdata(to_video_device(cd));
716 if (!cam) {
717 up(&et61x251_sysfs_lock);
718 return -ENODEV;
719 }
720
721 count = sprintf(buf, "%u\n", cam->sysfs.reg);
722
723 up(&et61x251_sysfs_lock);
724
725 return count;
726}
727
728
729static ssize_t
730et61x251_store_reg(struct class_device* cd, const char* buf, size_t len)
731{
732 struct et61x251_device* cam;
733 u8 index;
734 ssize_t count;
735
736 if (down_interruptible(&et61x251_sysfs_lock))
737 return -ERESTARTSYS;
738
739 cam = video_get_drvdata(to_video_device(cd));
740 if (!cam) {
741 up(&et61x251_sysfs_lock);
742 return -ENODEV;
743 }
744
745 index = et61x251_strtou8(buf, len, &count);
746 if (index > 0x8e || !count) {
747 up(&et61x251_sysfs_lock);
748 return -EINVAL;
749 }
750
751 cam->sysfs.reg = index;
752
753 DBG(2, "Moved ET61X[12]51 register index to 0x%02X", cam->sysfs.reg);
754 DBG(3, "Written bytes: %zd", count);
755
756 up(&et61x251_sysfs_lock);
757
758 return count;
759}
760
761
762static ssize_t et61x251_show_val(struct class_device* cd, char* buf)
763{
764 struct et61x251_device* cam;
765 ssize_t count;
766 int val;
767
768 if (down_interruptible(&et61x251_sysfs_lock))
769 return -ERESTARTSYS;
770
771 cam = video_get_drvdata(to_video_device(cd));
772 if (!cam) {
773 up(&et61x251_sysfs_lock);
774 return -ENODEV;
775 }
776
777 if ((val = et61x251_read_reg(cam, cam->sysfs.reg)) < 0) {
778 up(&et61x251_sysfs_lock);
779 return -EIO;
780 }
781
782 count = sprintf(buf, "%d\n", val);
783
784 DBG(3, "Read bytes: %zd", count);
785
786 up(&et61x251_sysfs_lock);
787
788 return count;
789}
790
791
792static ssize_t
793et61x251_store_val(struct class_device* cd, const char* buf, size_t len)
794{
795 struct et61x251_device* cam;
796 u8 value;
797 ssize_t count;
798 int err;
799
800 if (down_interruptible(&et61x251_sysfs_lock))
801 return -ERESTARTSYS;
802
803 cam = video_get_drvdata(to_video_device(cd));
804 if (!cam) {
805 up(&et61x251_sysfs_lock);
806 return -ENODEV;
807 }
808
809 value = et61x251_strtou8(buf, len, &count);
810 if (!count) {
811 up(&et61x251_sysfs_lock);
812 return -EINVAL;
813 }
814
815 err = et61x251_write_reg(cam, value, cam->sysfs.reg);
816 if (err) {
817 up(&et61x251_sysfs_lock);
818 return -EIO;
819 }
820
821 DBG(2, "Written ET61X[12]51 reg. 0x%02X, val. 0x%02X",
822 cam->sysfs.reg, value);
823 DBG(3, "Written bytes: %zd", count);
824
825 up(&et61x251_sysfs_lock);
826
827 return count;
828}
829
830
831static ssize_t et61x251_show_i2c_reg(struct class_device* cd, char* buf)
832{
833 struct et61x251_device* cam;
834 ssize_t count;
835
836 if (down_interruptible(&et61x251_sysfs_lock))
837 return -ERESTARTSYS;
838
839 cam = video_get_drvdata(to_video_device(cd));
840 if (!cam) {
841 up(&et61x251_sysfs_lock);
842 return -ENODEV;
843 }
844
845 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
846
847 DBG(3, "Read bytes: %zd", count);
848
849 up(&et61x251_sysfs_lock);
850
851 return count;
852}
853
854
855static ssize_t
856et61x251_store_i2c_reg(struct class_device* cd, const char* buf, size_t len)
857{
858 struct et61x251_device* cam;
859 u8 index;
860 ssize_t count;
861
862 if (down_interruptible(&et61x251_sysfs_lock))
863 return -ERESTARTSYS;
864
865 cam = video_get_drvdata(to_video_device(cd));
866 if (!cam) {
867 up(&et61x251_sysfs_lock);
868 return -ENODEV;
869 }
870
871 index = et61x251_strtou8(buf, len, &count);
872 if (!count) {
873 up(&et61x251_sysfs_lock);
874 return -EINVAL;
875 }
876
877 cam->sysfs.i2c_reg = index;
878
879 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
880 DBG(3, "Written bytes: %zd", count);
881
882 up(&et61x251_sysfs_lock);
883
884 return count;
885}
886
887
888static ssize_t et61x251_show_i2c_val(struct class_device* cd, char* buf)
889{
890 struct et61x251_device* cam;
891 ssize_t count;
892 int val;
893
894 if (down_interruptible(&et61x251_sysfs_lock))
895 return -ERESTARTSYS;
896
897 cam = video_get_drvdata(to_video_device(cd));
898 if (!cam) {
899 up(&et61x251_sysfs_lock);
900 return -ENODEV;
901 }
902
903 if (!(cam->sensor->sysfs_ops & ET61X251_I2C_READ)) {
904 up(&et61x251_sysfs_lock);
905 return -ENOSYS;
906 }
907
908 if ((val = et61x251_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
909 up(&et61x251_sysfs_lock);
910 return -EIO;
911 }
912
913 count = sprintf(buf, "%d\n", val);
914
915 DBG(3, "Read bytes: %zd", count);
916
917 up(&et61x251_sysfs_lock);
918
919 return count;
920}
921
922
923static ssize_t
924et61x251_store_i2c_val(struct class_device* cd, const char* buf, size_t len)
925{
926 struct et61x251_device* cam;
927 u8 value;
928 ssize_t count;
929 int err;
930
931 if (down_interruptible(&et61x251_sysfs_lock))
932 return -ERESTARTSYS;
933
934 cam = video_get_drvdata(to_video_device(cd));
935 if (!cam) {
936 up(&et61x251_sysfs_lock);
937 return -ENODEV;
938 }
939
940 if (!(cam->sensor->sysfs_ops & ET61X251_I2C_READ)) {
941 up(&et61x251_sysfs_lock);
942 return -ENOSYS;
943 }
944
945 value = et61x251_strtou8(buf, len, &count);
946 if (!count) {
947 up(&et61x251_sysfs_lock);
948 return -EINVAL;
949 }
950
951 err = et61x251_i2c_write(cam, cam->sysfs.i2c_reg, value);
952 if (err) {
953 up(&et61x251_sysfs_lock);
954 return -EIO;
955 }
956
957 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
958 cam->sysfs.i2c_reg, value);
959 DBG(3, "Written bytes: %zd", count);
960
961 up(&et61x251_sysfs_lock);
962
963 return count;
964}
965
966
967static CLASS_DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
968 et61x251_show_reg, et61x251_store_reg);
969static CLASS_DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
970 et61x251_show_val, et61x251_store_val);
971static CLASS_DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
972 et61x251_show_i2c_reg, et61x251_store_i2c_reg);
973static CLASS_DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
974 et61x251_show_i2c_val, et61x251_store_i2c_val);
975
976
977static void et61x251_create_sysfs(struct et61x251_device* cam)
978{
979 struct video_device *v4ldev = cam->v4ldev;
980
981 video_device_create_file(v4ldev, &class_device_attr_reg);
982 video_device_create_file(v4ldev, &class_device_attr_val);
983 if (cam->sensor && cam->sensor->sysfs_ops) {
984 video_device_create_file(v4ldev, &class_device_attr_i2c_reg);
985 video_device_create_file(v4ldev, &class_device_attr_i2c_val);
986 }
987}
988#endif /* CONFIG_VIDEO_ADV_DEBUG */
989
990/*****************************************************************************/
991
992static int
993et61x251_set_pix_format(struct et61x251_device* cam,
994 struct v4l2_pix_format* pix)
995{
996 int r, err = 0;
997
998 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
999 err += r;
1000 if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1001 err += et61x251_write_reg(cam, r & 0xfd, 0x12);
1002 else
1003 err += et61x251_write_reg(cam, r | 0x02, 0x12);
1004
1005 return err ? -EIO : 0;
1006}
1007
1008
1009static int
1010et61x251_set_compression(struct et61x251_device* cam,
1011 struct v4l2_jpegcompression* compression)
1012{
1013 int r, err = 0;
1014
1015 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1016 err += r;
1017 if (compression->quality == 0)
1018 err += et61x251_write_reg(cam, r & 0xfb, 0x12);
1019 else
1020 err += et61x251_write_reg(cam, r | 0x04, 0x12);
1021
1022 return err ? -EIO : 0;
1023}
1024
1025
1026static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
1027{
1028 int r = 0, err = 0;
1029
1030 r = et61x251_read_reg(cam, 0x12);
1031 if (r < 0)
1032 err += r;
1033
1034 if (scale == 1)
1035 err += et61x251_write_reg(cam, r & ~0x01, 0x12);
1036 else if (scale == 2)
1037 err += et61x251_write_reg(cam, r | 0x01, 0x12);
1038
1039 if (err)
1040 return -EIO;
1041
1042 PDBGG("Scaling factor: %u", scale);
1043
1044 return 0;
1045}
1046
1047
1048static int
1049et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
1050{
1051 struct et61x251_sensor* s = cam->sensor;
1052 u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
1053 s->active_pixel.left),
1054 fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
1055 s->active_pixel.top),
1056 fmw_length = (u16)(rect->width),
1057 fmw_height = (u16)(rect->height);
1058 int err = 0;
1059
1060 err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
1061 err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
1062 err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
1063 err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
1064 err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
1065 | ((fmw_length & 0x300) >> 4)
1066 | ((fmw_height & 0x300) >> 2), 0x6d);
1067 if (err)
1068 return -EIO;
1069
1070 PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
1071 fmw_sx, fmw_sy, fmw_length, fmw_height);
1072
1073 return 0;
1074}
1075
1076
1077static int et61x251_init(struct et61x251_device* cam)
1078{
1079 struct et61x251_sensor* s = cam->sensor;
1080 struct v4l2_control ctrl;
1081 struct v4l2_queryctrl *qctrl;
1082 struct v4l2_rect* rect;
1083 u8 i = 0;
1084 int err = 0;
1085
1086 if (!(cam->state & DEV_INITIALIZED)) {
1087 init_waitqueue_head(&cam->open);
1088 qctrl = s->qctrl;
1089 rect = &(s->cropcap.defrect);
1090 cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
1091 } else { /* use current values */
1092 qctrl = s->_qctrl;
1093 rect = &(s->_rect);
1094 }
1095
1096 err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
1097 err += et61x251_set_crop(cam, rect);
1098 if (err)
1099 return err;
1100
1101 if (s->init) {
1102 err = s->init(cam);
1103 if (err) {
1104 DBG(3, "Sensor initialization failed");
1105 return err;
1106 }
1107 }
1108
1109 err += et61x251_set_compression(cam, &cam->compression);
1110 err += et61x251_set_pix_format(cam, &s->pix_format);
1111 if (s->set_pix_format)
1112 err += s->set_pix_format(cam, &s->pix_format);
1113 if (err)
1114 return err;
1115
1116 if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
1117 DBG(3, "Compressed video format is active, quality %d",
1118 cam->compression.quality);
1119 else
1120 DBG(3, "Uncompressed video format is active");
1121
1122 if (s->set_crop)
1123 if ((err = s->set_crop(cam, rect))) {
1124 DBG(3, "set_crop() failed");
1125 return err;
1126 }
1127
1128 if (s->set_ctrl) {
1129 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1130 if (s->qctrl[i].id != 0 &&
1131 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1132 ctrl.id = s->qctrl[i].id;
1133 ctrl.value = qctrl[i].default_value;
1134 err = s->set_ctrl(cam, &ctrl);
1135 if (err) {
1136 DBG(3, "Set %s control failed",
1137 s->qctrl[i].name);
1138 return err;
1139 }
1140 DBG(3, "Image sensor supports '%s' control",
1141 s->qctrl[i].name);
1142 }
1143 }
1144
1145 if (!(cam->state & DEV_INITIALIZED)) {
1146 init_MUTEX(&cam->fileop_sem);
1147 spin_lock_init(&cam->queue_lock);
1148 init_waitqueue_head(&cam->wait_frame);
1149 init_waitqueue_head(&cam->wait_stream);
1150 cam->nreadbuffers = 2;
1151 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1152 memcpy(&(s->_rect), &(s->cropcap.defrect),
1153 sizeof(struct v4l2_rect));
1154 cam->state |= DEV_INITIALIZED;
1155 }
1156
1157 DBG(2, "Initialization succeeded");
1158 return 0;
1159}
1160
1161
1162static void et61x251_release_resources(struct et61x251_device* cam)
1163{
1164 down(&et61x251_sysfs_lock);
1165
1166 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
1167 video_set_drvdata(cam->v4ldev, NULL);
1168 video_unregister_device(cam->v4ldev);
1169
1170 up(&et61x251_sysfs_lock);
1171
1172 kfree(cam->control_buffer);
1173}
1174
1175/*****************************************************************************/
1176
1177static int et61x251_open(struct inode* inode, struct file* filp)
1178{
1179 struct et61x251_device* cam;
1180 int err = 0;
1181
1182 /*
1183 This is the only safe way to prevent race conditions with
1184 disconnect
1185 */
1186 if (!down_read_trylock(&et61x251_disconnect))
1187 return -ERESTARTSYS;
1188
1189 cam = video_get_drvdata(video_devdata(filp));
1190
1191 if (down_interruptible(&cam->dev_sem)) {
1192 up_read(&et61x251_disconnect);
1193 return -ERESTARTSYS;
1194 }
1195
1196 if (cam->users) {
1197 DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
1198 if ((filp->f_flags & O_NONBLOCK) ||
1199 (filp->f_flags & O_NDELAY)) {
1200 err = -EWOULDBLOCK;
1201 goto out;
1202 }
1203 up(&cam->dev_sem);
1204 err = wait_event_interruptible_exclusive(cam->open,
1205 cam->state & DEV_DISCONNECTED
1206 || !cam->users);
1207 if (err) {
1208 up_read(&et61x251_disconnect);
1209 return err;
1210 }
1211 if (cam->state & DEV_DISCONNECTED) {
1212 up_read(&et61x251_disconnect);
1213 return -ENODEV;
1214 }
1215 down(&cam->dev_sem);
1216 }
1217
1218
1219 if (cam->state & DEV_MISCONFIGURED) {
1220 err = et61x251_init(cam);
1221 if (err) {
1222 DBG(1, "Initialization failed again. "
1223 "I will retry on next open().");
1224 goto out;
1225 }
1226 cam->state &= ~DEV_MISCONFIGURED;
1227 }
1228
1229 if ((err = et61x251_start_transfer(cam)))
1230 goto out;
1231
1232 filp->private_data = cam;
1233 cam->users++;
1234 cam->io = IO_NONE;
1235 cam->stream = STREAM_OFF;
1236 cam->nbuffers = 0;
1237 cam->frame_count = 0;
1238 et61x251_empty_framequeues(cam);
1239
1240 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
1241
1242out:
1243 up(&cam->dev_sem);
1244 up_read(&et61x251_disconnect);
1245 return err;
1246}
1247
1248
1249static int et61x251_release(struct inode* inode, struct file* filp)
1250{
1251 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1252
1253 down(&cam->dev_sem); /* prevent disconnect() to be called */
1254
1255 et61x251_stop_transfer(cam);
1256
1257 et61x251_release_buffers(cam);
1258
1259 if (cam->state & DEV_DISCONNECTED) {
1260 et61x251_release_resources(cam);
1261 up(&cam->dev_sem);
1262 kfree(cam);
1263 return 0;
1264 }
1265
1266 cam->users--;
1267 wake_up_interruptible_nr(&cam->open, 1);
1268
1269 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
1270
1271 up(&cam->dev_sem);
1272
1273 return 0;
1274}
1275
1276
1277static ssize_t
1278et61x251_read(struct file* filp, char __user * buf,
1279 size_t count, loff_t* f_pos)
1280{
1281 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1282 struct et61x251_frame_t* f, * i;
1283 unsigned long lock_flags;
1284 int err = 0;
1285
1286 if (down_interruptible(&cam->fileop_sem))
1287 return -ERESTARTSYS;
1288
1289 if (cam->state & DEV_DISCONNECTED) {
1290 DBG(1, "Device not present");
1291 up(&cam->fileop_sem);
1292 return -ENODEV;
1293 }
1294
1295 if (cam->state & DEV_MISCONFIGURED) {
1296 DBG(1, "The camera is misconfigured. Close and open it "
1297 "again.");
1298 up(&cam->fileop_sem);
1299 return -EIO;
1300 }
1301
1302 if (cam->io == IO_MMAP) {
1303 DBG(3, "Close and open the device again to choose the read "
1304 "method");
1305 up(&cam->fileop_sem);
1306 return -EINVAL;
1307 }
1308
1309 if (cam->io == IO_NONE) {
1310 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1311 IO_READ)) {
1312 DBG(1, "read() failed, not enough memory");
1313 up(&cam->fileop_sem);
1314 return -ENOMEM;
1315 }
1316 cam->io = IO_READ;
1317 cam->stream = STREAM_ON;
1318 }
1319
1320 if (list_empty(&cam->inqueue)) {
1321 if (!list_empty(&cam->outqueue))
1322 et61x251_empty_framequeues(cam);
1323 et61x251_queue_unusedframes(cam);
1324 }
1325
1326 if (!count) {
1327 up(&cam->fileop_sem);
1328 return 0;
1329 }
1330
1331 if (list_empty(&cam->outqueue)) {
1332 if (filp->f_flags & O_NONBLOCK) {
1333 up(&cam->fileop_sem);
1334 return -EAGAIN;
1335 }
1336 err = wait_event_interruptible
1337 ( cam->wait_frame,
1338 (!list_empty(&cam->outqueue)) ||
1339 (cam->state & DEV_DISCONNECTED) ||
1340 (cam->state & DEV_MISCONFIGURED) );
1341 if (err) {
1342 up(&cam->fileop_sem);
1343 return err;
1344 }
1345 if (cam->state & DEV_DISCONNECTED) {
1346 up(&cam->fileop_sem);
1347 return -ENODEV;
1348 }
1349 if (cam->state & DEV_MISCONFIGURED) {
1350 up(&cam->fileop_sem);
1351 return -EIO;
1352 }
1353 }
1354
1355 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1356
1357 if (count > f->buf.bytesused)
1358 count = f->buf.bytesused;
1359
1360 if (copy_to_user(buf, f->bufmem, count)) {
1361 err = -EFAULT;
1362 goto exit;
1363 }
1364 *f_pos += count;
1365
1366exit:
1367 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1368 list_for_each_entry(i, &cam->outqueue, frame)
1369 i->state = F_UNUSED;
1370 INIT_LIST_HEAD(&cam->outqueue);
1371 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1372
1373 et61x251_queue_unusedframes(cam);
1374
1375 PDBGG("Frame #%lu, bytes read: %zu",
1376 (unsigned long)f->buf.index, count);
1377
1378 up(&cam->fileop_sem);
1379
1380 return err ? err : count;
1381}
1382
1383
1384static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1385{
1386 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1387 struct et61x251_frame_t* f;
1388 unsigned long lock_flags;
1389 unsigned int mask = 0;
1390
1391 if (down_interruptible(&cam->fileop_sem))
1392 return POLLERR;
1393
1394 if (cam->state & DEV_DISCONNECTED) {
1395 DBG(1, "Device not present");
1396 goto error;
1397 }
1398
1399 if (cam->state & DEV_MISCONFIGURED) {
1400 DBG(1, "The camera is misconfigured. Close and open it "
1401 "again.");
1402 goto error;
1403 }
1404
1405 if (cam->io == IO_NONE) {
1406 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1407 IO_READ)) {
1408 DBG(1, "poll() failed, not enough memory");
1409 goto error;
1410 }
1411 cam->io = IO_READ;
1412 cam->stream = STREAM_ON;
1413 }
1414
1415 if (cam->io == IO_READ) {
1416 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1417 list_for_each_entry(f, &cam->outqueue, frame)
1418 f->state = F_UNUSED;
1419 INIT_LIST_HEAD(&cam->outqueue);
1420 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1421 et61x251_queue_unusedframes(cam);
1422 }
1423
1424 poll_wait(filp, &cam->wait_frame, wait);
1425
1426 if (!list_empty(&cam->outqueue))
1427 mask |= POLLIN | POLLRDNORM;
1428
1429 up(&cam->fileop_sem);
1430
1431 return mask;
1432
1433error:
1434 up(&cam->fileop_sem);
1435 return POLLERR;
1436}
1437
1438
1439static void et61x251_vm_open(struct vm_area_struct* vma)
1440{
1441 struct et61x251_frame_t* f = vma->vm_private_data;
1442 f->vma_use_count++;
1443}
1444
1445
1446static void et61x251_vm_close(struct vm_area_struct* vma)
1447{
1448 /* NOTE: buffers are not freed here */
1449 struct et61x251_frame_t* f = vma->vm_private_data;
1450 f->vma_use_count--;
1451}
1452
1453
1454static struct vm_operations_struct et61x251_vm_ops = {
1455 .open = et61x251_vm_open,
1456 .close = et61x251_vm_close,
1457};
1458
1459
1460static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1461{
1462 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1463 unsigned long size = vma->vm_end - vma->vm_start,
1464 start = vma->vm_start;
1465 void *pos;
1466 u32 i;
1467
1468 if (down_interruptible(&cam->fileop_sem))
1469 return -ERESTARTSYS;
1470
1471 if (cam->state & DEV_DISCONNECTED) {
1472 DBG(1, "Device not present");
1473 up(&cam->fileop_sem);
1474 return -ENODEV;
1475 }
1476
1477 if (cam->state & DEV_MISCONFIGURED) {
1478 DBG(1, "The camera is misconfigured. Close and open it "
1479 "again.");
1480 up(&cam->fileop_sem);
1481 return -EIO;
1482 }
1483
1484 if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
1485 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1486 up(&cam->fileop_sem);
1487 return -EINVAL;
1488 }
1489
1490 for (i = 0; i < cam->nbuffers; i++) {
1491 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1492 break;
1493 }
1494 if (i == cam->nbuffers) {
1495 up(&cam->fileop_sem);
1496 return -EINVAL;
1497 }
1498
1499 vma->vm_flags |= VM_IO;
1500 vma->vm_flags |= VM_RESERVED;
1501
1502 pos = cam->frame[i].bufmem;
1503 while (size > 0) { /* size is page-aligned */
1504 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1505 up(&cam->fileop_sem);
1506 return -EAGAIN;
1507 }
1508 start += PAGE_SIZE;
1509 pos += PAGE_SIZE;
1510 size -= PAGE_SIZE;
1511 }
1512
1513 vma->vm_ops = &et61x251_vm_ops;
1514 vma->vm_private_data = &cam->frame[i];
1515
1516 et61x251_vm_open(vma);
1517
1518 up(&cam->fileop_sem);
1519
1520 return 0;
1521}
1522
1523/*****************************************************************************/
1524
1525static int
1526et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1527{
1528 struct v4l2_capability cap = {
1529 .driver = "et61x251",
1530 .version = ET61X251_MODULE_VERSION_CODE,
1531 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1532 V4L2_CAP_STREAMING,
1533 };
1534
1535 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1536 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1537 strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
1538 sizeof(cap.bus_info));
1539
1540 if (copy_to_user(arg, &cap, sizeof(cap)))
1541 return -EFAULT;
1542
1543 return 0;
1544}
1545
1546
1547static int
1548et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1549{
1550 struct v4l2_input i;
1551
1552 if (copy_from_user(&i, arg, sizeof(i)))
1553 return -EFAULT;
1554
1555 if (i.index)
1556 return -EINVAL;
1557
1558 memset(&i, 0, sizeof(i));
1559 strcpy(i.name, "Camera");
1560
1561 if (copy_to_user(arg, &i, sizeof(i)))
1562 return -EFAULT;
1563
1564 return 0;
1565}
1566
1567
1568static int
1569et61x251_vidioc_gs_input(struct et61x251_device* cam, void __user * arg)
1570{
1571 int index;
1572
1573 if (copy_from_user(&index, arg, sizeof(index)))
1574 return -EFAULT;
1575
1576 if (index != 0)
1577 return -EINVAL;
1578
1579 return 0;
1580}
1581
1582
1583static int
1584et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1585{
1586 struct et61x251_sensor* s = cam->sensor;
1587 struct v4l2_queryctrl qc;
1588 u8 i;
1589
1590 if (copy_from_user(&qc, arg, sizeof(qc)))
1591 return -EFAULT;
1592
1593 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1594 if (qc.id && qc.id == s->qctrl[i].id) {
1595 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1596 if (copy_to_user(arg, &qc, sizeof(qc)))
1597 return -EFAULT;
1598 return 0;
1599 }
1600
1601 return -EINVAL;
1602}
1603
1604
1605static int
1606et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1607{
1608 struct et61x251_sensor* s = cam->sensor;
1609 struct v4l2_control ctrl;
1610 int err = 0;
1611 u8 i;
1612
1613 if (!s->get_ctrl && !s->set_ctrl)
1614 return -EINVAL;
1615
1616 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1617 return -EFAULT;
1618
1619 if (!s->get_ctrl) {
1620 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1621 if (ctrl.id == s->qctrl[i].id) {
1622 ctrl.value = s->_qctrl[i].default_value;
1623 goto exit;
1624 }
1625 return -EINVAL;
1626 } else
1627 err = s->get_ctrl(cam, &ctrl);
1628
1629exit:
1630 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1631 return -EFAULT;
1632
1633 return err;
1634}
1635
1636
1637static int
1638et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1639{
1640 struct et61x251_sensor* s = cam->sensor;
1641 struct v4l2_control ctrl;
1642 u8 i;
1643 int err = 0;
1644
1645 if (!s->set_ctrl)
1646 return -EINVAL;
1647
1648 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1649 return -EFAULT;
1650
1651 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1652 if (ctrl.id == s->qctrl[i].id) {
1653 if (ctrl.value < s->qctrl[i].minimum ||
1654 ctrl.value > s->qctrl[i].maximum)
1655 return -ERANGE;
1656 ctrl.value -= ctrl.value % s->qctrl[i].step;
1657 break;
1658 }
1659
1660 if ((err = s->set_ctrl(cam, &ctrl)))
1661 return err;
1662
1663 s->_qctrl[i].default_value = ctrl.value;
1664
1665 return 0;
1666}
1667
1668
1669static int
1670et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1671{
1672 struct v4l2_cropcap* cc = &(cam->sensor->cropcap);
1673
1674 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1675 cc->pixelaspect.numerator = 1;
1676 cc->pixelaspect.denominator = 1;
1677
1678 if (copy_to_user(arg, cc, sizeof(*cc)))
1679 return -EFAULT;
1680
1681 return 0;
1682}
1683
1684
1685static int
1686et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1687{
1688 struct et61x251_sensor* s = cam->sensor;
1689 struct v4l2_crop crop = {
1690 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1691 };
1692
1693 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1694
1695 if (copy_to_user(arg, &crop, sizeof(crop)))
1696 return -EFAULT;
1697
1698 return 0;
1699}
1700
1701
1702static int
1703et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1704{
1705 struct et61x251_sensor* s = cam->sensor;
1706 struct v4l2_crop crop;
1707 struct v4l2_rect* rect;
1708 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1709 struct v4l2_pix_format* pix_format = &(s->pix_format);
1710 u8 scale;
1711 const enum et61x251_stream_state stream = cam->stream;
1712 const u32 nbuffers = cam->nbuffers;
1713 u32 i;
1714 int err = 0;
1715
1716 if (copy_from_user(&crop, arg, sizeof(crop)))
1717 return -EFAULT;
1718
1719 rect = &(crop.c);
1720
1721 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1722 return -EINVAL;
1723
1724 if (cam->module_param.force_munmap)
1725 for (i = 0; i < cam->nbuffers; i++)
1726 if (cam->frame[i].vma_use_count) {
1727 DBG(3, "VIDIOC_S_CROP failed. "
1728 "Unmap the buffers first.");
1729 return -EINVAL;
1730 }
1731
1732 /* Preserve R,G or B origin */
1733 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1734 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1735
1736 if (rect->width < 4)
1737 rect->width = 4;
1738 if (rect->height < 4)
1739 rect->height = 4;
1740 if (rect->width > bounds->width)
1741 rect->width = bounds->width;
1742 if (rect->height > bounds->height)
1743 rect->height = bounds->height;
1744 if (rect->left < bounds->left)
1745 rect->left = bounds->left;
1746 if (rect->top < bounds->top)
1747 rect->top = bounds->top;
1748 if (rect->left + rect->width > bounds->left + bounds->width)
1749 rect->left = bounds->left+bounds->width - rect->width;
1750 if (rect->top + rect->height > bounds->top + bounds->height)
1751 rect->top = bounds->top+bounds->height - rect->height;
1752
1753 rect->width &= ~3L;
1754 rect->height &= ~3L;
1755
1756 if (ET61X251_PRESERVE_IMGSCALE) {
1757 /* Calculate the actual scaling factor */
1758 u32 a, b;
1759 a = rect->width * rect->height;
1760 b = pix_format->width * pix_format->height;
1761 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1762 } else
1763 scale = 1;
1764
1765 if (cam->stream == STREAM_ON)
1766 if ((err = et61x251_stream_interrupt(cam)))
1767 return err;
1768
1769 if (copy_to_user(arg, &crop, sizeof(crop))) {
1770 cam->stream = stream;
1771 return -EFAULT;
1772 }
1773
1774 if (cam->module_param.force_munmap || cam->io == IO_READ)
1775 et61x251_release_buffers(cam);
1776
1777 err = et61x251_set_crop(cam, rect);
1778 if (s->set_crop)
1779 err += s->set_crop(cam, rect);
1780 err += et61x251_set_scale(cam, scale);
1781
1782 if (err) { /* atomic, no rollback in ioctl() */
1783 cam->state |= DEV_MISCONFIGURED;
1784 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1785 "use the camera, close and open /dev/video%d again.",
1786 cam->v4ldev->minor);
1787 return -EIO;
1788 }
1789
1790 s->pix_format.width = rect->width/scale;
1791 s->pix_format.height = rect->height/scale;
1792 memcpy(&(s->_rect), rect, sizeof(*rect));
1793
1794 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1795 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1796 cam->state |= DEV_MISCONFIGURED;
1797 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1798 "use the camera, close and open /dev/video%d again.",
1799 cam->v4ldev->minor);
1800 return -ENOMEM;
1801 }
1802
1803 if (cam->io == IO_READ)
1804 et61x251_empty_framequeues(cam);
1805 else if (cam->module_param.force_munmap)
1806 et61x251_requeue_outqueue(cam);
1807
1808 cam->stream = stream;
1809
1810 return 0;
1811}
1812
1813
1814static int
1815et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1816{
1817 struct v4l2_fmtdesc fmtd;
1818
1819 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1820 return -EFAULT;
1821
1822 if (fmtd.index == 0) {
1823 strcpy(fmtd.description, "bayer rgb");
1824 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1825 } else if (fmtd.index == 1) {
1826 strcpy(fmtd.description, "compressed");
1827 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1828 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1829 } else
1830 return -EINVAL;
1831
1832 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1833 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1834
1835 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1836 return -EFAULT;
1837
1838 return 0;
1839}
1840
1841
1842static int
1843et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1844{
1845 struct v4l2_format format;
1846 struct v4l2_pix_format* pfmt = &(cam->sensor->pix_format);
1847
1848 if (copy_from_user(&format, arg, sizeof(format)))
1849 return -EFAULT;
1850
1851 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1852 return -EINVAL;
1853
1854 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1855 ? 0 : (pfmt->width * pfmt->priv) / 8;
1856 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1857 pfmt->field = V4L2_FIELD_NONE;
1858 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1859
1860 if (copy_to_user(arg, &format, sizeof(format)))
1861 return -EFAULT;
1862
1863 return 0;
1864}
1865
1866
1867static int
1868et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1869 void __user * arg)
1870{
1871 struct et61x251_sensor* s = cam->sensor;
1872 struct v4l2_format format;
1873 struct v4l2_pix_format* pix;
1874 struct v4l2_pix_format* pfmt = &(s->pix_format);
1875 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1876 struct v4l2_rect rect;
1877 u8 scale;
1878 const enum et61x251_stream_state stream = cam->stream;
1879 const u32 nbuffers = cam->nbuffers;
1880 u32 i;
1881 int err = 0;
1882
1883 if (copy_from_user(&format, arg, sizeof(format)))
1884 return -EFAULT;
1885
1886 pix = &(format.fmt.pix);
1887
1888 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1889 return -EINVAL;
1890
1891 memcpy(&rect, &(s->_rect), sizeof(rect));
1892
1893 { /* calculate the actual scaling factor */
1894 u32 a, b;
1895 a = rect.width * rect.height;
1896 b = pix->width * pix->height;
1897 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1898 }
1899
1900 rect.width = scale * pix->width;
1901 rect.height = scale * pix->height;
1902
1903 if (rect.width < 4)
1904 rect.width = 4;
1905 if (rect.height < 4)
1906 rect.height = 4;
1907 if (rect.width > bounds->left + bounds->width - rect.left)
1908 rect.width = bounds->left + bounds->width - rect.left;
1909 if (rect.height > bounds->top + bounds->height - rect.top)
1910 rect.height = bounds->top + bounds->height - rect.top;
1911
1912 rect.width &= ~3L;
1913 rect.height &= ~3L;
1914
1915 { /* adjust the scaling factor */
1916 u32 a, b;
1917 a = rect.width * rect.height;
1918 b = pix->width * pix->height;
1919 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1920 }
1921
1922 pix->width = rect.width / scale;
1923 pix->height = rect.height / scale;
1924
1925 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
1926 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
1927 pix->pixelformat = pfmt->pixelformat;
1928 pix->priv = pfmt->priv; /* bpp */
1929 pix->colorspace = pfmt->colorspace;
1930 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1931 ? 0 : (pix->width * pix->priv) / 8;
1932 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
1933 pix->field = V4L2_FIELD_NONE;
1934
1935 if (cmd == VIDIOC_TRY_FMT) {
1936 if (copy_to_user(arg, &format, sizeof(format)))
1937 return -EFAULT;
1938 return 0;
1939 }
1940
1941 if (cam->module_param.force_munmap)
1942 for (i = 0; i < cam->nbuffers; i++)
1943 if (cam->frame[i].vma_use_count) {
1944 DBG(3, "VIDIOC_S_FMT failed. "
1945 "Unmap the buffers first.");
1946 return -EINVAL;
1947 }
1948
1949 if (cam->stream == STREAM_ON)
1950 if ((err = et61x251_stream_interrupt(cam)))
1951 return err;
1952
1953 if (copy_to_user(arg, &format, sizeof(format))) {
1954 cam->stream = stream;
1955 return -EFAULT;
1956 }
1957
1958 if (cam->module_param.force_munmap || cam->io == IO_READ)
1959 et61x251_release_buffers(cam);
1960
1961 err += et61x251_set_pix_format(cam, pix);
1962 err += et61x251_set_crop(cam, &rect);
1963 if (s->set_pix_format)
1964 err += s->set_pix_format(cam, pix);
1965 if (s->set_crop)
1966 err += s->set_crop(cam, &rect);
1967 err += et61x251_set_scale(cam, scale);
1968
1969 if (err) { /* atomic, no rollback in ioctl() */
1970 cam->state |= DEV_MISCONFIGURED;
1971 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
1972 "use the camera, close and open /dev/video%d again.",
1973 cam->v4ldev->minor);
1974 return -EIO;
1975 }
1976
1977 memcpy(pfmt, pix, sizeof(*pix));
1978 memcpy(&(s->_rect), &rect, sizeof(rect));
1979
1980 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1981 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1982 cam->state |= DEV_MISCONFIGURED;
1983 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
1984 "use the camera, close and open /dev/video%d again.",
1985 cam->v4ldev->minor);
1986 return -ENOMEM;
1987 }
1988
1989 if (cam->io == IO_READ)
1990 et61x251_empty_framequeues(cam);
1991 else if (cam->module_param.force_munmap)
1992 et61x251_requeue_outqueue(cam);
1993
1994 cam->stream = stream;
1995
1996 return 0;
1997}
1998
1999
2000static int
2001et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2002{
2003 if (copy_to_user(arg, &cam->compression,
2004 sizeof(cam->compression)))
2005 return -EFAULT;
2006
2007 return 0;
2008}
2009
2010
2011static int
2012et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2013{
2014 struct v4l2_jpegcompression jc;
2015 const enum et61x251_stream_state stream = cam->stream;
2016 int err = 0;
2017
2018 if (copy_from_user(&jc, arg, sizeof(jc)))
2019 return -EFAULT;
2020
2021 if (jc.quality != 0 && jc.quality != 1)
2022 return -EINVAL;
2023
2024 if (cam->stream == STREAM_ON)
2025 if ((err = et61x251_stream_interrupt(cam)))
2026 return err;
2027
2028 err += et61x251_set_compression(cam, &jc);
2029 if (err) { /* atomic, no rollback in ioctl() */
2030 cam->state |= DEV_MISCONFIGURED;
2031 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2032 "problems. To use the camera, close and open "
2033 "/dev/video%d again.", cam->v4ldev->minor);
2034 return -EIO;
2035 }
2036
2037 cam->compression.quality = jc.quality;
2038
2039 cam->stream = stream;
2040
2041 return 0;
2042}
2043
2044
2045static int
2046et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2047{
2048 struct v4l2_requestbuffers rb;
2049 u32 i;
2050 int err;
2051
2052 if (copy_from_user(&rb, arg, sizeof(rb)))
2053 return -EFAULT;
2054
2055 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2056 rb.memory != V4L2_MEMORY_MMAP)
2057 return -EINVAL;
2058
2059 if (cam->io == IO_READ) {
2060 DBG(3, "Close and open the device again to choose the mmap "
2061 "I/O method");
2062 return -EINVAL;
2063 }
2064
2065 for (i = 0; i < cam->nbuffers; i++)
2066 if (cam->frame[i].vma_use_count) {
2067 DBG(3, "VIDIOC_REQBUFS failed. "
2068 "Previous buffers are still mapped.");
2069 return -EINVAL;
2070 }
2071
2072 if (cam->stream == STREAM_ON)
2073 if ((err = et61x251_stream_interrupt(cam)))
2074 return err;
2075
2076 et61x251_empty_framequeues(cam);
2077
2078 et61x251_release_buffers(cam);
2079 if (rb.count)
2080 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2081
2082 if (copy_to_user(arg, &rb, sizeof(rb))) {
2083 et61x251_release_buffers(cam);
2084 cam->io = IO_NONE;
2085 return -EFAULT;
2086 }
2087
2088 cam->io = rb.count ? IO_MMAP : IO_NONE;
2089
2090 return 0;
2091}
2092
2093
2094static int
2095et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2096{
2097 struct v4l2_buffer b;
2098
2099 if (copy_from_user(&b, arg, sizeof(b)))
2100 return -EFAULT;
2101
2102 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2103 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2104 return -EINVAL;
2105
2106 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2107
2108 if (cam->frame[b.index].vma_use_count)
2109 b.flags |= V4L2_BUF_FLAG_MAPPED;
2110
2111 if (cam->frame[b.index].state == F_DONE)
2112 b.flags |= V4L2_BUF_FLAG_DONE;
2113 else if (cam->frame[b.index].state != F_UNUSED)
2114 b.flags |= V4L2_BUF_FLAG_QUEUED;
2115
2116 if (copy_to_user(arg, &b, sizeof(b)))
2117 return -EFAULT;
2118
2119 return 0;
2120}
2121
2122
2123static int
2124et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2125{
2126 struct v4l2_buffer b;
2127 unsigned long lock_flags;
2128
2129 if (copy_from_user(&b, arg, sizeof(b)))
2130 return -EFAULT;
2131
2132 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2133 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2134 return -EINVAL;
2135
2136 if (cam->frame[b.index].state != F_UNUSED)
2137 return -EINVAL;
2138
2139 cam->frame[b.index].state = F_QUEUED;
2140
2141 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2142 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2143 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2144
2145 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2146
2147 return 0;
2148}
2149
2150
2151static int
2152et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2153 void __user * arg)
2154{
2155 struct v4l2_buffer b;
2156 struct et61x251_frame_t *f;
2157 unsigned long lock_flags;
2158 int err = 0;
2159
2160 if (copy_from_user(&b, arg, sizeof(b)))
2161 return -EFAULT;
2162
2163 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2164 return -EINVAL;
2165
2166 if (list_empty(&cam->outqueue)) {
2167 if (cam->stream == STREAM_OFF)
2168 return -EINVAL;
2169 if (filp->f_flags & O_NONBLOCK)
2170 return -EAGAIN;
2171 err = wait_event_interruptible
2172 ( cam->wait_frame,
2173 (!list_empty(&cam->outqueue)) ||
2174 (cam->state & DEV_DISCONNECTED) ||
2175 (cam->state & DEV_MISCONFIGURED) );
2176 if (err)
2177 return err;
2178 if (cam->state & DEV_DISCONNECTED)
2179 return -ENODEV;
2180 if (cam->state & DEV_MISCONFIGURED)
2181 return -EIO;
2182 }
2183
2184 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2185 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2186 list_del(cam->outqueue.next);
2187 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2188
2189 f->state = F_UNUSED;
2190
2191 memcpy(&b, &f->buf, sizeof(b));
2192 if (f->vma_use_count)
2193 b.flags |= V4L2_BUF_FLAG_MAPPED;
2194
2195 if (copy_to_user(arg, &b, sizeof(b)))
2196 return -EFAULT;
2197
2198 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2199
2200 return 0;
2201}
2202
2203
2204static int
2205et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2206{
2207 int type;
2208
2209 if (copy_from_user(&type, arg, sizeof(type)))
2210 return -EFAULT;
2211
2212 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2213 return -EINVAL;
2214
2215 if (list_empty(&cam->inqueue))
2216 return -EINVAL;
2217
2218 cam->stream = STREAM_ON;
2219
2220 DBG(3, "Stream on");
2221
2222 return 0;
2223}
2224
2225
2226static int
2227et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2228{
2229 int type, err;
2230
2231 if (copy_from_user(&type, arg, sizeof(type)))
2232 return -EFAULT;
2233
2234 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2235 return -EINVAL;
2236
2237 if (cam->stream == STREAM_ON)
2238 if ((err = et61x251_stream_interrupt(cam)))
2239 return err;
2240
2241 et61x251_empty_framequeues(cam);
2242
2243 DBG(3, "Stream off");
2244
2245 return 0;
2246}
2247
2248
2249static int
2250et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2251{
2252 struct v4l2_streamparm sp;
2253
2254 if (copy_from_user(&sp, arg, sizeof(sp)))
2255 return -EFAULT;
2256
2257 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2258 return -EINVAL;
2259
2260 sp.parm.capture.extendedmode = 0;
2261 sp.parm.capture.readbuffers = cam->nreadbuffers;
2262
2263 if (copy_to_user(arg, &sp, sizeof(sp)))
2264 return -EFAULT;
2265
2266 return 0;
2267}
2268
2269
2270static int
2271et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2272{
2273 struct v4l2_streamparm sp;
2274
2275 if (copy_from_user(&sp, arg, sizeof(sp)))
2276 return -EFAULT;
2277
2278 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2279 return -EINVAL;
2280
2281 sp.parm.capture.extendedmode = 0;
2282
2283 if (sp.parm.capture.readbuffers == 0)
2284 sp.parm.capture.readbuffers = cam->nreadbuffers;
2285
2286 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2287 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2288
2289 if (copy_to_user(arg, &sp, sizeof(sp)))
2290 return -EFAULT;
2291
2292 cam->nreadbuffers = sp.parm.capture.readbuffers;
2293
2294 return 0;
2295}
2296
2297
2298static int et61x251_ioctl_v4l2(struct inode* inode, struct file* filp,
2299 unsigned int cmd, void __user * arg)
2300{
2301 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2302
2303 switch (cmd) {
2304
2305 case VIDIOC_QUERYCAP:
2306 return et61x251_vidioc_querycap(cam, arg);
2307
2308 case VIDIOC_ENUMINPUT:
2309 return et61x251_vidioc_enuminput(cam, arg);
2310
2311 case VIDIOC_G_INPUT:
2312 case VIDIOC_S_INPUT:
2313 return et61x251_vidioc_gs_input(cam, arg);
2314
2315 case VIDIOC_QUERYCTRL:
2316 return et61x251_vidioc_query_ctrl(cam, arg);
2317
2318 case VIDIOC_G_CTRL:
2319 return et61x251_vidioc_g_ctrl(cam, arg);
2320
2321 case VIDIOC_S_CTRL_OLD:
2322 case VIDIOC_S_CTRL:
2323 return et61x251_vidioc_s_ctrl(cam, arg);
2324
2325 case VIDIOC_CROPCAP_OLD:
2326 case VIDIOC_CROPCAP:
2327 return et61x251_vidioc_cropcap(cam, arg);
2328
2329 case VIDIOC_G_CROP:
2330 return et61x251_vidioc_g_crop(cam, arg);
2331
2332 case VIDIOC_S_CROP:
2333 return et61x251_vidioc_s_crop(cam, arg);
2334
2335 case VIDIOC_ENUM_FMT:
2336 return et61x251_vidioc_enum_fmt(cam, arg);
2337
2338 case VIDIOC_G_FMT:
2339 return et61x251_vidioc_g_fmt(cam, arg);
2340
2341 case VIDIOC_TRY_FMT:
2342 case VIDIOC_S_FMT:
2343 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2344
2345 case VIDIOC_G_JPEGCOMP:
2346 return et61x251_vidioc_g_jpegcomp(cam, arg);
2347
2348 case VIDIOC_S_JPEGCOMP:
2349 return et61x251_vidioc_s_jpegcomp(cam, arg);
2350
2351 case VIDIOC_REQBUFS:
2352 return et61x251_vidioc_reqbufs(cam, arg);
2353
2354 case VIDIOC_QUERYBUF:
2355 return et61x251_vidioc_querybuf(cam, arg);
2356
2357 case VIDIOC_QBUF:
2358 return et61x251_vidioc_qbuf(cam, arg);
2359
2360 case VIDIOC_DQBUF:
2361 return et61x251_vidioc_dqbuf(cam, filp, arg);
2362
2363 case VIDIOC_STREAMON:
2364 return et61x251_vidioc_streamon(cam, arg);
2365
2366 case VIDIOC_STREAMOFF:
2367 return et61x251_vidioc_streamoff(cam, arg);
2368
2369 case VIDIOC_G_PARM:
2370 return et61x251_vidioc_g_parm(cam, arg);
2371
2372 case VIDIOC_S_PARM_OLD:
2373 case VIDIOC_S_PARM:
2374 return et61x251_vidioc_s_parm(cam, arg);
2375
2376 case VIDIOC_G_STD:
2377 case VIDIOC_S_STD:
2378 case VIDIOC_QUERYSTD:
2379 case VIDIOC_ENUMSTD:
2380 case VIDIOC_QUERYMENU:
2381 return -EINVAL;
2382
2383 default:
2384 return -EINVAL;
2385
2386 }
2387}
2388
2389
2390static int et61x251_ioctl(struct inode* inode, struct file* filp,
2391 unsigned int cmd, unsigned long arg)
2392{
2393 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2394 int err = 0;
2395
2396 if (down_interruptible(&cam->fileop_sem))
2397 return -ERESTARTSYS;
2398
2399 if (cam->state & DEV_DISCONNECTED) {
2400 DBG(1, "Device not present");
2401 up(&cam->fileop_sem);
2402 return -ENODEV;
2403 }
2404
2405 if (cam->state & DEV_MISCONFIGURED) {
2406 DBG(1, "The camera is misconfigured. Close and open it "
2407 "again.");
2408 up(&cam->fileop_sem);
2409 return -EIO;
2410 }
2411
2412 V4LDBG(3, "et61x251", cmd);
2413
2414 err = et61x251_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
2415
2416 up(&cam->fileop_sem);
2417
2418 return err;
2419}
2420
2421
2422static struct file_operations et61x251_fops = {
2423 .owner = THIS_MODULE,
2424 .open = et61x251_open,
2425 .release = et61x251_release,
2426 .ioctl = et61x251_ioctl,
2427 .read = et61x251_read,
2428 .poll = et61x251_poll,
2429 .mmap = et61x251_mmap,
2430 .llseek = no_llseek,
2431};
2432
2433/*****************************************************************************/
2434
2435/* It exists a single interface only. We do not need to validate anything. */
2436static int
2437et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2438{
2439 struct usb_device *udev = interface_to_usbdev(intf);
2440 struct et61x251_device* cam;
2441 static unsigned int dev_nr = 0;
2442 unsigned int i;
2443 int err = 0;
2444
2445 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2446 return -ENOMEM;
2447
2448 cam->usbdev = udev;
2449
2450 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2451 DBG(1, "kmalloc() failed");
2452 err = -ENOMEM;
2453 goto fail;
2454 }
2455
2456 if (!(cam->v4ldev = video_device_alloc())) {
2457 DBG(1, "video_device_alloc() failed");
2458 err = -ENOMEM;
2459 goto fail;
2460 }
2461
2462 init_MUTEX(&cam->dev_sem);
2463
2464 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2465 "(vid/pid 0x%04X/0x%04X)",id->idVendor, id->idProduct);
2466
2467 for (i = 0; et61x251_sensor_table[i]; i++) {
2468 err = et61x251_sensor_table[i](cam);
2469 if (!err)
2470 break;
2471 }
2472
2473 if (!err && cam->sensor)
2474 DBG(2, "%s image sensor detected", cam->sensor->name);
2475 else {
2476 DBG(1, "No supported image sensor detected");
2477 err = -ENODEV;
2478 goto fail;
2479 }
2480
2481 if (et61x251_init(cam)) {
2482 DBG(1, "Initialization failed. I will retry on open().");
2483 cam->state |= DEV_MISCONFIGURED;
2484 }
2485
2486 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2487 cam->v4ldev->owner = THIS_MODULE;
2488 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
2489 cam->v4ldev->hardware = 0;
2490 cam->v4ldev->fops = &et61x251_fops;
2491 cam->v4ldev->minor = video_nr[dev_nr];
2492 cam->v4ldev->release = video_device_release;
2493 video_set_drvdata(cam->v4ldev, cam);
2494
2495 down(&cam->dev_sem);
2496
2497 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2498 video_nr[dev_nr]);
2499 if (err) {
2500 DBG(1, "V4L2 device registration failed");
2501 if (err == -ENFILE && video_nr[dev_nr] == -1)
2502 DBG(1, "Free /dev/videoX node not found");
2503 video_nr[dev_nr] = -1;
2504 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2505 up(&cam->dev_sem);
2506 goto fail;
2507 }
2508
2509 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
2510
2511 cam->module_param.force_munmap = force_munmap[dev_nr];
2512
2513 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2514
2515#ifdef CONFIG_VIDEO_ADV_DEBUG
2516 et61x251_create_sysfs(cam);
2517 DBG(2, "Optional device control through 'sysfs' interface ready");
2518#endif
2519
2520 usb_set_intfdata(intf, cam);
2521
2522 up(&cam->dev_sem);
2523
2524 return 0;
2525
2526fail:
2527 if (cam) {
2528 kfree(cam->control_buffer);
2529 if (cam->v4ldev)
2530 video_device_release(cam->v4ldev);
2531 kfree(cam);
2532 }
2533 return err;
2534}
2535
2536
2537static void et61x251_usb_disconnect(struct usb_interface* intf)
2538{
2539 struct et61x251_device* cam = usb_get_intfdata(intf);
2540
2541 if (!cam)
2542 return;
2543
2544 down_write(&et61x251_disconnect);
2545
2546 down(&cam->dev_sem);
2547
2548 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2549
2550 wake_up_interruptible_all(&cam->open);
2551
2552 if (cam->users) {
2553 DBG(2, "Device /dev/video%d is open! Deregistration and "
2554 "memory deallocation are deferred on close.",
2555 cam->v4ldev->minor);
2556 cam->state |= DEV_MISCONFIGURED;
2557 et61x251_stop_transfer(cam);
2558 cam->state |= DEV_DISCONNECTED;
2559 wake_up_interruptible(&cam->wait_frame);
2560 wake_up_interruptible(&cam->wait_stream);
2561 } else {
2562 cam->state |= DEV_DISCONNECTED;
2563 et61x251_release_resources(cam);
2564 }
2565
2566 up(&cam->dev_sem);
2567
2568 if (!cam->users)
2569 kfree(cam);
2570
2571 up_write(&et61x251_disconnect);
2572}
2573
2574
2575static struct usb_driver et61x251_usb_driver = {
2576 .name = "et61x251",
2577 .id_table = et61x251_id_table,
2578 .probe = et61x251_usb_probe,
2579 .disconnect = et61x251_usb_disconnect,
2580};
2581
2582/*****************************************************************************/
2583
2584static int __init et61x251_module_init(void)
2585{
2586 int err = 0;
2587
2588 KDBG(2, ET61X251_MODULE_NAME " v" ET61X251_MODULE_VERSION);
2589 KDBG(3, ET61X251_MODULE_AUTHOR);
2590
2591 if ((err = usb_register(&et61x251_usb_driver)))
2592 KDBG(1, "usb_register() failed");
2593
2594 return err;
2595}
2596
2597
2598static void __exit et61x251_module_exit(void)
2599{
2600 usb_deregister(&et61x251_usb_driver);
2601}
2602
2603
2604module_init(et61x251_module_init);
2605module_exit(et61x251_module_exit);
diff --git a/drivers/usb/media/et61x251_sensor.h b/drivers/usb/media/et61x251_sensor.h
new file mode 100644
index 00000000000..b9df91062fc
--- /dev/null
+++ b/drivers/usb/media/et61x251_sensor.h
@@ -0,0 +1,115 @@
1/***************************************************************************
2 * API for image sensors connected to ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21#ifndef _ET61X251_SENSOR_H_
22#define _ET61X251_SENSOR_H_
23
24#include <linux/usb.h>
25#include <linux/videodev.h>
26#include <linux/device.h>
27#include <linux/stddef.h>
28#include <linux/errno.h>
29#include <asm/types.h>
30
31struct et61x251_device;
32struct et61x251_sensor;
33
34/*****************************************************************************/
35
36extern int et61x251_probe_tas5130d1b(struct et61x251_device* cam);
37
38#define ET61X251_SENSOR_TABLE \
39/* Weak detections must go at the end of the list */ \
40static int (*et61x251_sensor_table[])(struct et61x251_device*) = { \
41 &et61x251_probe_tas5130d1b, \
42 NULL, \
43};
44
45extern void
46et61x251_attach_sensor(struct et61x251_device* cam,
47 struct et61x251_sensor* sensor);
48
49/*****************************************************************************/
50
51extern int et61x251_write_reg(struct et61x251_device*, u8 value, u16 index);
52extern int et61x251_read_reg(struct et61x251_device*, u16 index);
53extern int et61x251_i2c_write(struct et61x251_device*, u8 address, u8 value);
54extern int et61x251_i2c_read(struct et61x251_device*, u8 address);
55extern int et61x251_i2c_try_write(struct et61x251_device*,
56 struct et61x251_sensor*, u8 address,
57 u8 value);
58extern int et61x251_i2c_try_read(struct et61x251_device*,
59 struct et61x251_sensor*, u8 address);
60extern int et61x251_i2c_raw_write(struct et61x251_device*, u8 n, u8 data1,
61 u8 data2, u8 data3, u8 data4, u8 data5,
62 u8 data6, u8 data7, u8 data8, u8 address);
63
64/*****************************************************************************/
65
66enum et61x251_i2c_sysfs_ops {
67 ET61X251_I2C_READ = 0x01,
68 ET61X251_I2C_WRITE = 0x02,
69};
70
71enum et61x251_i2c_interface {
72 ET61X251_I2C_2WIRES,
73 ET61X251_I2C_3WIRES,
74};
75
76/* Repeat start condition when RSTA is high */
77enum et61x251_i2c_rsta {
78 ET61X251_I2C_RSTA_STOP = 0x00, /* stop then start */
79 ET61X251_I2C_RSTA_REPEAT = 0x01, /* repeat start */
80};
81
82#define ET61X251_MAX_CTRLS V4L2_CID_LASTP1-V4L2_CID_BASE+10
83
84struct et61x251_sensor {
85 char name[32];
86
87 enum et61x251_i2c_sysfs_ops sysfs_ops;
88
89 enum et61x251_i2c_interface interface;
90 u8 i2c_slave_id;
91 enum et61x251_i2c_rsta rsta;
92 struct v4l2_rect active_pixel; /* left and top define FVSX and FVSY */
93
94 struct v4l2_queryctrl qctrl[ET61X251_MAX_CTRLS];
95 struct v4l2_cropcap cropcap;
96 struct v4l2_pix_format pix_format;
97
98 int (*init)(struct et61x251_device* cam);
99 int (*get_ctrl)(struct et61x251_device* cam,
100 struct v4l2_control* ctrl);
101 int (*set_ctrl)(struct et61x251_device* cam,
102 const struct v4l2_control* ctrl);
103 int (*set_crop)(struct et61x251_device* cam,
104 const struct v4l2_rect* rect);
105 int (*set_pix_format)(struct et61x251_device* cam,
106 const struct v4l2_pix_format* pix);
107
108 const struct usb_device* usbdev;
109
110 /* Private */
111 struct v4l2_queryctrl _qctrl[ET61X251_MAX_CTRLS];
112 struct v4l2_rect _rect;
113};
114
115#endif /* _ET61X251_SENSOR_H_ */
diff --git a/drivers/usb/media/et61x251_tas5130d1b.c b/drivers/usb/media/et61x251_tas5130d1b.c
new file mode 100644
index 00000000000..65f1ae9cf2b
--- /dev/null
+++ b/drivers/usb/media/et61x251_tas5130d1b.c
@@ -0,0 +1,137 @@
1/***************************************************************************
2 * Plug-in for TAS5130D1B image sensor connected to the ET61X[12]51 *
3 * PC Camera Controllers *
4 * *
5 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
16 * *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the Free Software *
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
20 ***************************************************************************/
21
22#include "et61x251_sensor.h"
23
24
25static int tas5130d1b_init(struct et61x251_device* cam)
26{
27 int err = 0;
28
29 err += et61x251_write_reg(cam, 0x14, 0x01);
30 err += et61x251_write_reg(cam, 0x1b, 0x02);
31 err += et61x251_write_reg(cam, 0x02, 0x12);
32 err += et61x251_write_reg(cam, 0x0e, 0x60);
33 err += et61x251_write_reg(cam, 0x80, 0x61);
34 err += et61x251_write_reg(cam, 0xf0, 0x62);
35 err += et61x251_write_reg(cam, 0x03, 0x63);
36 err += et61x251_write_reg(cam, 0x14, 0x64);
37 err += et61x251_write_reg(cam, 0xf4, 0x65);
38 err += et61x251_write_reg(cam, 0x01, 0x66);
39 err += et61x251_write_reg(cam, 0x05, 0x67);
40 err += et61x251_write_reg(cam, 0x8f, 0x68);
41 err += et61x251_write_reg(cam, 0x0f, 0x8d);
42 err += et61x251_write_reg(cam, 0x08, 0x8e);
43
44 return err;
45}
46
47
48static int tas5130d1b_set_ctrl(struct et61x251_device* cam,
49 const struct v4l2_control* ctrl)
50{
51 int err = 0;
52
53 switch (ctrl->id) {
54 case V4L2_CID_GAIN:
55 err += et61x251_i2c_raw_write(cam, 2, 0x20,
56 0xf6-ctrl->value, 0, 0, 0,
57 0, 0, 0, 0);
58 break;
59 case V4L2_CID_EXPOSURE:
60 err += et61x251_i2c_raw_write(cam, 2, 0x40,
61 0x47-ctrl->value, 0, 0, 0,
62 0, 0, 0, 0);
63 break;
64 default:
65 return -EINVAL;
66 }
67
68 return err ? -EIO : 0;
69}
70
71
72static struct et61x251_sensor tas5130d1b = {
73 .name = "TAS5130D1B",
74 .interface = ET61X251_I2C_3WIRES,
75 .rsta = ET61X251_I2C_RSTA_STOP,
76 .active_pixel = {
77 .left = 106,
78 .top = 13,
79 },
80 .init = &tas5130d1b_init,
81 .qctrl = {
82 {
83 .id = V4L2_CID_GAIN,
84 .type = V4L2_CTRL_TYPE_INTEGER,
85 .name = "global gain",
86 .minimum = 0x00,
87 .maximum = 0xf6,
88 .step = 0x02,
89 .default_value = 0x0d,
90 .flags = 0,
91 },
92 {
93 .id = V4L2_CID_EXPOSURE,
94 .type = V4L2_CTRL_TYPE_INTEGER,
95 .name = "exposure",
96 .minimum = 0x00,
97 .maximum = 0x47,
98 .step = 0x01,
99 .default_value = 0x23,
100 .flags = 0,
101 },
102 },
103 .set_ctrl = &tas5130d1b_set_ctrl,
104 .cropcap = {
105 .bounds = {
106 .left = 0,
107 .top = 0,
108 .width = 640,
109 .height = 480,
110 },
111 .defrect = {
112 .left = 0,
113 .top = 0,
114 .width = 640,
115 .height = 480,
116 },
117 },
118 .pix_format = {
119 .width = 640,
120 .height = 480,
121 .pixelformat = V4L2_PIX_FMT_SBGGR8,
122 .priv = 8,
123 },
124};
125
126
127int et61x251_probe_tas5130d1b(struct et61x251_device* cam)
128{
129 /* This sensor has no identifiers, so let's attach it anyway */
130 et61x251_attach_sensor(cam, &tas5130d1b);
131
132 /* Sensor detection is based on USB pid/vid */
133 if (le16_to_cpu(tas5130d1b.usbdev->descriptor.idProduct) != 0x6251)
134 return -ENODEV;
135
136 return 0;
137}
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index ce40675324b..6f6c6977764 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -315,6 +315,7 @@ struct v4l2_pix_format
315#define V4L2_PIX_FMT_SN9C10X v4l2_fourcc('S','9','1','0') /* SN9C10x compression */ 315#define V4L2_PIX_FMT_SN9C10X v4l2_fourcc('S','9','1','0') /* SN9C10x compression */
316#define V4L2_PIX_FMT_PWC1 v4l2_fourcc('P','W','C','1') /* pwc older webcam */ 316#define V4L2_PIX_FMT_PWC1 v4l2_fourcc('P','W','C','1') /* pwc older webcam */
317#define V4L2_PIX_FMT_PWC2 v4l2_fourcc('P','W','C','2') /* pwc newer webcam */ 317#define V4L2_PIX_FMT_PWC2 v4l2_fourcc('P','W','C','2') /* pwc newer webcam */
318#define V4L2_PIX_FMT_ET61X251 v4l2_fourcc('E','6','2','5') /* ET61X251 compression */
318 319
319/* 320/*
320 * F O R M A T E N U M E R A T I O N 321 * F O R M A T E N U M E R A T I O N
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 21:58:19 -0500