1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
374 lines
18 KiB
C
374 lines
18 KiB
C
/***************************************************************************
|
|
* API for image sensors connected to the SN9C10x PC Camera Controllers *
|
|
* *
|
|
* Copyright (C) 2004-2005 by Luca Risolia <luca.risolia@studio.unibo.it> *
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
* This program is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
* GNU General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the GNU General Public License *
|
|
* along with this program; if not, write to the Free Software *
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
|
|
***************************************************************************/
|
|
|
|
#ifndef _SN9C102_SENSOR_H_
|
|
#define _SN9C102_SENSOR_H_
|
|
|
|
#include <linux/usb.h>
|
|
#include <linux/videodev.h>
|
|
#include <linux/device.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/types.h>
|
|
|
|
struct sn9c102_device;
|
|
struct sn9c102_sensor;
|
|
|
|
/*****************************************************************************/
|
|
|
|
/*
|
|
OVERVIEW.
|
|
This is a small interface that allows you to add support for any CCD/CMOS
|
|
image sensors connected to the SN9C10X bridges. The entire API is documented
|
|
below. In the most general case, to support a sensor there are three steps
|
|
you have to follow:
|
|
1) define the main "sn9c102_sensor" structure by setting the basic fields;
|
|
2) write a probing function to be called by the core module when the USB
|
|
camera is recognized, then add both the USB ids and the name of that
|
|
function to the two corresponding tables SENSOR_TABLE and ID_TABLE (see
|
|
below);
|
|
3) implement the methods that you want/need (and fill the rest of the main
|
|
structure accordingly).
|
|
"sn9c102_pas106b.c" is an example of all this stuff. Remember that you do
|
|
NOT need to touch the source code of the core module for the things to work
|
|
properly, unless you find bugs or flaws in it. Finally, do not forget to
|
|
read the V4L2 API for completeness.
|
|
*/
|
|
|
|
/*****************************************************************************/
|
|
|
|
/*
|
|
Probing functions: on success, you must attach the sensor to the camera
|
|
by calling sn9c102_attach_sensor() provided below.
|
|
To enable the I2C communication, you might need to perform a really basic
|
|
initialization of the SN9C10X chip by using the write function declared
|
|
ahead.
|
|
Functions must return 0 on success, the appropriate error otherwise.
|
|
*/
|
|
extern int sn9c102_probe_hv7131d(struct sn9c102_device* cam);
|
|
extern int sn9c102_probe_mi0343(struct sn9c102_device* cam);
|
|
extern int sn9c102_probe_pas106b(struct sn9c102_device* cam);
|
|
extern int sn9c102_probe_pas202bcb(struct sn9c102_device* cam);
|
|
extern int sn9c102_probe_tas5110c1b(struct sn9c102_device* cam);
|
|
extern int sn9c102_probe_tas5130d1b(struct sn9c102_device* cam);
|
|
|
|
/*
|
|
Add the above entries to this table. Be sure to add the entry in the right
|
|
place, since, on failure, the next probing routine is called according to
|
|
the order of the list below, from top to bottom.
|
|
*/
|
|
#define SN9C102_SENSOR_TABLE \
|
|
static int (*sn9c102_sensor_table[])(struct sn9c102_device*) = { \
|
|
&sn9c102_probe_mi0343, /* strong detection based on SENSOR ids */ \
|
|
&sn9c102_probe_pas106b, /* strong detection based on SENSOR ids */ \
|
|
&sn9c102_probe_pas202bcb, /* strong detection based on SENSOR ids */ \
|
|
&sn9c102_probe_hv7131d, /* strong detection based on SENSOR ids */ \
|
|
&sn9c102_probe_tas5110c1b, /* detection based on USB pid/vid */ \
|
|
&sn9c102_probe_tas5130d1b, /* detection based on USB pid/vid */ \
|
|
NULL, \
|
|
};
|
|
|
|
/* Attach a probed sensor to the camera. */
|
|
extern void
|
|
sn9c102_attach_sensor(struct sn9c102_device* cam,
|
|
struct sn9c102_sensor* sensor);
|
|
|
|
/* Each SN9C10X camera has proper PID/VID identifiers. Add them here in case.*/
|
|
#define SN9C102_ID_TABLE \
|
|
static const struct usb_device_id sn9c102_id_table[] = { \
|
|
{ USB_DEVICE(0x0c45, 0x6001), }, /* TAS5110C1B */ \
|
|
{ USB_DEVICE(0x0c45, 0x6005), }, /* TAS5110C1B */ \
|
|
{ USB_DEVICE(0x0c45, 0x6009), }, /* PAS106B */ \
|
|
{ USB_DEVICE(0x0c45, 0x600d), }, /* PAS106B */ \
|
|
{ USB_DEVICE(0x0c45, 0x6024), }, \
|
|
{ USB_DEVICE(0x0c45, 0x6025), }, /* TAS5130D1B and TAS5110C1B */ \
|
|
{ USB_DEVICE(0x0c45, 0x6028), }, /* PAS202BCB */ \
|
|
{ USB_DEVICE(0x0c45, 0x6029), }, /* PAS106B */ \
|
|
{ USB_DEVICE(0x0c45, 0x602a), }, /* HV7131D */ \
|
|
{ USB_DEVICE(0x0c45, 0x602b), }, /* MI-0343 */ \
|
|
{ USB_DEVICE(0x0c45, 0x602c), }, /* OV7620 */ \
|
|
{ USB_DEVICE(0x0c45, 0x6030), }, /* MI03x */ \
|
|
{ USB_DEVICE(0x0c45, 0x6080), }, \
|
|
{ USB_DEVICE(0x0c45, 0x6082), }, /* MI0343 and MI0360 */ \
|
|
{ USB_DEVICE(0x0c45, 0x6083), }, /* HV7131[D|E1] */ \
|
|
{ USB_DEVICE(0x0c45, 0x6088), }, \
|
|
{ USB_DEVICE(0x0c45, 0x608a), }, \
|
|
{ USB_DEVICE(0x0c45, 0x608b), }, \
|
|
{ USB_DEVICE(0x0c45, 0x608c), }, /* HV7131x */ \
|
|
{ USB_DEVICE(0x0c45, 0x608e), }, /* CIS-VF10 */ \
|
|
{ USB_DEVICE(0x0c45, 0x608f), }, /* OV7630 */ \
|
|
{ USB_DEVICE(0x0c45, 0x60a0), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60a2), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60a3), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60a8), }, /* PAS106B */ \
|
|
{ USB_DEVICE(0x0c45, 0x60aa), }, /* TAS5130D1B */ \
|
|
{ USB_DEVICE(0x0c45, 0x60ab), }, /* TAS5110C1B */ \
|
|
{ USB_DEVICE(0x0c45, 0x60ac), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60ae), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60af), }, /* PAS202BCB */ \
|
|
{ USB_DEVICE(0x0c45, 0x60b0), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60b2), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60b3), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60b8), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60ba), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60bb), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60bc), }, \
|
|
{ USB_DEVICE(0x0c45, 0x60be), }, \
|
|
{ } \
|
|
};
|
|
|
|
/*****************************************************************************/
|
|
|
|
/*
|
|
Read/write routines: they always return -1 on error, 0 or the read value
|
|
otherwise. NOTE that a real read operation is not supported by the SN9C10X
|
|
chip for some of its registers. To work around this problem, a pseudo-read
|
|
call is provided instead: it returns the last successfully written value
|
|
on the register (0 if it has never been written), the usual -1 on error.
|
|
*/
|
|
|
|
/* The "try" I2C I/O versions are used when probing the sensor */
|
|
extern int sn9c102_i2c_try_write(struct sn9c102_device*,struct sn9c102_sensor*,
|
|
u8 address, u8 value);
|
|
extern int sn9c102_i2c_try_read(struct sn9c102_device*,struct sn9c102_sensor*,
|
|
u8 address);
|
|
|
|
/*
|
|
These must be used if and only if the sensor doesn't implement the standard
|
|
I2C protocol. There are a number of good reasons why you must use the
|
|
single-byte versions of these functions: do not abuse. The first function
|
|
writes n bytes, from data0 to datan, to registers 0x09 - 0x09+n of SN9C10X
|
|
chip. The second one programs the registers 0x09 and 0x10 with data0 and
|
|
data1, and places the n bytes read from the sensor register table in the
|
|
buffer pointed by 'buffer'. Both the functions return -1 on error; the write
|
|
version returns 0 on success, while the read version returns the first read
|
|
byte.
|
|
*/
|
|
extern int sn9c102_i2c_try_raw_write(struct sn9c102_device* cam,
|
|
struct sn9c102_sensor* sensor, u8 n,
|
|
u8 data0, u8 data1, u8 data2, u8 data3,
|
|
u8 data4, u8 data5);
|
|
extern int sn9c102_i2c_try_raw_read(struct sn9c102_device* cam,
|
|
struct sn9c102_sensor* sensor, u8 data0,
|
|
u8 data1, u8 n, u8 buffer[]);
|
|
|
|
/* To be used after the sensor struct has been attached to the camera struct */
|
|
extern int sn9c102_i2c_write(struct sn9c102_device*, u8 address, u8 value);
|
|
extern int sn9c102_i2c_read(struct sn9c102_device*, u8 address);
|
|
|
|
/* I/O on registers in the bridge. Could be used by the sensor methods too */
|
|
extern int sn9c102_write_reg(struct sn9c102_device*, u8 value, u16 index);
|
|
extern int sn9c102_pread_reg(struct sn9c102_device*, u16 index);
|
|
|
|
/*
|
|
NOTE: there are no exported debugging functions. To uniform the output you
|
|
must use the dev_info()/dev_warn()/dev_err() macros defined in device.h,
|
|
already included here, the argument being the struct device 'dev' of the
|
|
sensor structure. Do NOT use these macros before the sensor is attached or
|
|
the kernel will crash! However, you should not need to notify the user about
|
|
common errors or other messages, since this is done by the master module.
|
|
*/
|
|
|
|
/*****************************************************************************/
|
|
|
|
enum sn9c102_i2c_sysfs_ops {
|
|
SN9C102_I2C_READ = 0x01,
|
|
SN9C102_I2C_WRITE = 0x02,
|
|
};
|
|
|
|
enum sn9c102_i2c_frequency { /* sensors may support both the frequencies */
|
|
SN9C102_I2C_100KHZ = 0x01,
|
|
SN9C102_I2C_400KHZ = 0x02,
|
|
};
|
|
|
|
enum sn9c102_i2c_interface {
|
|
SN9C102_I2C_2WIRES,
|
|
SN9C102_I2C_3WIRES,
|
|
};
|
|
|
|
struct sn9c102_sensor {
|
|
char name[32], /* sensor name */
|
|
maintainer[64]; /* name of the mantainer <email> */
|
|
|
|
/* Supported operations through the 'sysfs' interface */
|
|
enum sn9c102_i2c_sysfs_ops sysfs_ops;
|
|
|
|
/*
|
|
These sensor capabilities must be provided if the SN9C10X controller
|
|
needs to communicate through the sensor serial interface by using
|
|
at least one of the i2c functions available.
|
|
*/
|
|
enum sn9c102_i2c_frequency frequency;
|
|
enum sn9c102_i2c_interface interface;
|
|
|
|
/*
|
|
This identifier must be provided if the image sensor implements
|
|
the standard I2C protocol.
|
|
*/
|
|
u8 i2c_slave_id; /* reg. 0x09 */
|
|
|
|
/*
|
|
NOTE: Where not noted,most of the functions below are not mandatory.
|
|
Set to null if you do not implement them. If implemented,
|
|
they must return 0 on success, the proper error otherwise.
|
|
*/
|
|
|
|
int (*init)(struct sn9c102_device* cam);
|
|
/*
|
|
This function will be called after the sensor has been attached.
|
|
It should be used to initialize the sensor only, but may also
|
|
configure part of the SN9C10X chip if necessary. You don't need to
|
|
setup picture settings like brightness, contrast, etc.. here, if
|
|
the corrisponding controls are implemented (see below), since
|
|
they are adjusted in the core driver by calling the set_ctrl()
|
|
method after init(), where the arguments are the default values
|
|
specified in the v4l2_queryctrl list of supported controls;
|
|
Same suggestions apply for other settings, _if_ the corresponding
|
|
methods are present; if not, the initialization must configure the
|
|
sensor according to the default configuration structures below.
|
|
*/
|
|
|
|
struct v4l2_queryctrl qctrl[V4L2_CID_LASTP1-V4L2_CID_BASE];
|
|
/*
|
|
Optional list of default controls, defined as indicated in the
|
|
V4L2 API. Menu type controls are not handled by this interface.
|
|
*/
|
|
|
|
int (*get_ctrl)(struct sn9c102_device* cam, struct v4l2_control* ctrl);
|
|
int (*set_ctrl)(struct sn9c102_device* cam,
|
|
const struct v4l2_control* ctrl);
|
|
/*
|
|
You must implement at least the set_ctrl method if you have defined
|
|
the list above. The returned value must follow the V4L2
|
|
specifications for the VIDIOC_G|C_CTRL ioctls. V4L2_CID_H|VCENTER
|
|
are not supported by this driver, so do not implement them. Also,
|
|
you don't have to check whether the passed values are out of bounds,
|
|
given that this is done by the core module.
|
|
*/
|
|
|
|
struct v4l2_cropcap cropcap;
|
|
/*
|
|
Think the image sensor as a grid of R,G,B monochromatic pixels
|
|
disposed according to a particular Bayer pattern, which describes
|
|
the complete array of pixels, from (0,0) to (xmax, ymax). We will
|
|
use this coordinate system from now on. It is assumed the sensor
|
|
chip can be programmed to capture/transmit a subsection of that
|
|
array of pixels: we will call this subsection "active window".
|
|
It is not always true that the largest achievable active window can
|
|
cover the whole array of pixels. The V4L2 API defines another
|
|
area called "source rectangle", which, in turn, is a subrectangle of
|
|
the active window. The SN9C10X chip is always programmed to read the
|
|
source rectangle.
|
|
The bounds of both the active window and the source rectangle are
|
|
specified in the cropcap substructures 'bounds' and 'defrect'.
|
|
By default, the source rectangle should cover the largest possible
|
|
area. Again, it is not always true that the largest source rectangle
|
|
can cover the entire active window, although it is a rare case for
|
|
the hardware we have. The bounds of the source rectangle _must_ be
|
|
multiple of 16 and must use the same coordinate system as indicated
|
|
before; their centers shall align initially.
|
|
If necessary, the sensor chip must be initialized during init() to
|
|
set the bounds of the active sensor window; however, by default, it
|
|
usually covers the largest achievable area (maxwidth x maxheight)
|
|
of pixels, so no particular initialization is needed, if you have
|
|
defined the correct default bounds in the structures.
|
|
See the V4L2 API for further details.
|
|
NOTE: once you have defined the bounds of the active window
|
|
(struct cropcap.bounds) you must not change them.anymore.
|
|
Only 'bounds' and 'defrect' fields are mandatory, other fields
|
|
will be ignored.
|
|
*/
|
|
|
|
int (*set_crop)(struct sn9c102_device* cam,
|
|
const struct v4l2_rect* rect);
|
|
/*
|
|
To be called on VIDIOC_C_SETCROP. The core module always calls a
|
|
default routine which configures the appropriate SN9C10X regs (also
|
|
scaling), but you may need to override/adjust specific stuff.
|
|
'rect' contains width and height values that are multiple of 16: in
|
|
case you override the default function, you always have to program
|
|
the chip to match those values; on error return the corresponding
|
|
error code without rolling back.
|
|
NOTE: in case, you must program the SN9C10X chip to get rid of
|
|
blank pixels or blank lines at the _start_ of each line or
|
|
frame after each HSYNC or VSYNC, so that the image starts with
|
|
real RGB data (see regs 0x12, 0x13) (having set H_SIZE and,
|
|
V_SIZE you don't have to care about blank pixels or blank
|
|
lines at the end of each line or frame).
|
|
*/
|
|
|
|
struct v4l2_pix_format pix_format;
|
|
/*
|
|
What you have to define here are: 1) initial 'width' and 'height' of
|
|
the target rectangle 2) the initial 'pixelformat', which can be
|
|
either V4L2_PIX_FMT_SN9C10X (for compressed video) or
|
|
V4L2_PIX_FMT_SBGGR8 3) 'priv', which we'll be used to indicate the
|
|
number of bits per pixel for uncompressed video, 8 or 9 (despite the
|
|
current value of 'pixelformat').
|
|
NOTE 1: both 'width' and 'height' _must_ be either 1/1 or 1/2 or 1/4
|
|
of cropcap.defrect.width and cropcap.defrect.height. I
|
|
suggest 1/1.
|
|
NOTE 2: The initial compression quality is defined by the first bit
|
|
of reg 0x17 during the initialization of the image sensor.
|
|
NOTE 3: as said above, you have to program the SN9C10X chip to get
|
|
rid of any blank pixels, so that the output of the sensor
|
|
matches the RGB bayer sequence (i.e. BGBGBG...GRGRGR).
|
|
*/
|
|
|
|
int (*set_pix_format)(struct sn9c102_device* cam,
|
|
const struct v4l2_pix_format* pix);
|
|
/*
|
|
To be called on VIDIOC_S_FMT, when switching from the SBGGR8 to
|
|
SN9C10X pixel format or viceversa. On error return the corresponding
|
|
error code without rolling back.
|
|
*/
|
|
|
|
const struct device* dev;
|
|
/*
|
|
This is the argument for dev_err(), dev_info() and dev_warn(). It
|
|
is used for debugging purposes. You must not access the struct
|
|
before the sensor is attached.
|
|
*/
|
|
|
|
const struct usb_device* usbdev;
|
|
/*
|
|
Points to the usb_device struct after the sensor is attached.
|
|
Do not touch unless you know what you are doing.
|
|
*/
|
|
|
|
/*
|
|
Do NOT write to the data below, it's READ ONLY. It is used by the
|
|
core module to store successfully updated values of the above
|
|
settings, for rollbacks..etc..in case of errors during atomic I/O
|
|
*/
|
|
struct v4l2_queryctrl _qctrl[V4L2_CID_LASTP1-V4L2_CID_BASE];
|
|
struct v4l2_rect _rect;
|
|
};
|
|
|
|
/*****************************************************************************/
|
|
|
|
/* Private ioctl's for control settings supported by some image sensors */
|
|
#define SN9C102_V4L2_CID_DAC_MAGNITUDE V4L2_CID_PRIVATE_BASE
|
|
#define SN9C102_V4L2_CID_GREEN_BALANCE V4L2_CID_PRIVATE_BASE + 1
|
|
#define SN9C102_V4L2_CID_RESET_LEVEL V4L2_CID_PRIVATE_BASE + 2
|
|
#define SN9C102_V4L2_CID_PIXEL_BIAS_VOLTAGE V4L2_CID_PRIVATE_BASE + 3
|
|
|
|
#endif /* _SN9C102_SENSOR_H_ */
|