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author | Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> | 2008-04-22 14:42:03 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-24 14:07:42 -0300 |
commit | e55222ef27a2390d8abce27a3ce2d4c719ad5f1b (patch) | |
tree | edf00fea5b924b53c08a69f702520523dc734a16 /include | |
parent | a7c7402f68cf97c9a021466c04029f039f9f4f27 (diff) | |
download | linux-stable-e55222ef27a2390d8abce27a3ce2d4c719ad5f1b.tar.gz linux-stable-e55222ef27a2390d8abce27a3ce2d4c719ad5f1b.tar.bz2 linux-stable-e55222ef27a2390d8abce27a3ce2d4c719ad5f1b.zip |
V4L/DVB (7170): soc_camera V4L2 driver for directly-connected SoC-based cameras
This driver provides an interface between platform-specific camera
busses and camera devices. It should be used if the camera is connected
not over a "proper" bus like PCI or USB, but over a special bus, like,
for example, the Quick Capture interface on PXA270 SoCs. Later it should
also be used for i.MX31 SoCs from Freescale. It can handle multiple
cameras and / or multiple busses, which can be used, e.g., in
stereo-vision applications.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/media/soc_camera.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h new file mode 100644 index 000000000000..69aba7188e44 --- /dev/null +++ b/include/media/soc_camera.h @@ -0,0 +1,147 @@ +/* + * camera image capture (abstract) bus driver header + * + * Copyright (C) 2006, Sascha Hauer, Pengutronix + * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef SOC_CAMERA_H +#define SOC_CAMERA_H + +#include <linux/videodev2.h> +#include <media/videobuf-dma-sg.h> + +struct soc_camera_device { + struct list_head list; + struct device dev; + struct device *control; + unsigned short width; /* Current window */ + unsigned short height; /* sizes */ + unsigned short x_min; /* Camera capabilities */ + unsigned short y_min; + unsigned short x_current; /* Current window location */ + unsigned short y_current; + unsigned short width_min; + unsigned short width_max; + unsigned short height_min; + unsigned short height_max; + unsigned short y_skip_top; /* Lines to skip at the top */ + unsigned short gain; + unsigned short exposure; + unsigned char iface; /* Host number */ + unsigned char devnum; /* Device number per host */ + unsigned char cached_datawidth; /* See comment in .c */ + struct soc_camera_ops *ops; + struct video_device *vdev; + const struct soc_camera_data_format *current_fmt; + int (*probe)(struct soc_camera_device *icd); + void (*remove)(struct soc_camera_device *icd); + struct module *owner; +}; + +struct soc_camera_file { + struct soc_camera_device *icd; + struct videobuf_queue vb_vidq; +}; + +struct soc_camera_host { + struct list_head list; + struct device dev; + unsigned char nr; /* Host number */ + size_t msize; + struct videobuf_queue_ops *vbq_ops; + struct module *owner; + void *priv; + char *drv_name; + int (*add)(struct soc_camera_device *); + void (*remove)(struct soc_camera_device *); + int (*set_capture_format)(struct soc_camera_device *, __u32, + struct v4l2_rect *); + int (*try_fmt_cap)(struct soc_camera_host *, struct v4l2_format *); + int (*reqbufs)(struct soc_camera_file *, struct v4l2_requestbuffers *); + int (*querycap)(struct soc_camera_host *, struct v4l2_capability *); + unsigned int (*poll)(struct file *, poll_table *); +}; + +struct soc_camera_link { + /* Camera bus id, used to match a camera and a bus */ + int bus_id; + /* GPIO number to switch between 8 and 10 bit modes */ + unsigned int gpio; +}; + +static inline struct soc_camera_device *to_soc_camera_dev(struct device *dev) +{ + return container_of(dev, struct soc_camera_device, dev); +} + +static inline struct soc_camera_host *to_soc_camera_host(struct device *dev) +{ + return container_of(dev, struct soc_camera_host, dev); +} + +extern int soc_camera_host_register(struct soc_camera_host *ici, + struct module *owner); +extern void soc_camera_host_unregister(struct soc_camera_host *ici); +extern int soc_camera_device_register(struct soc_camera_device *icd); +extern void soc_camera_device_unregister(struct soc_camera_device *icd); + +extern int soc_camera_video_start(struct soc_camera_device *icd); +extern void soc_camera_video_stop(struct soc_camera_device *icd); + +struct soc_camera_data_format { + char *name; + unsigned int depth; + __u32 fourcc; + enum v4l2_colorspace colorspace; +}; + +struct soc_camera_ops { + struct module *owner; + int (*init)(struct soc_camera_device *); + int (*release)(struct soc_camera_device *); + int (*start_capture)(struct soc_camera_device *); + int (*stop_capture)(struct soc_camera_device *); + int (*set_capture_format)(struct soc_camera_device *, __u32, + struct v4l2_rect *, unsigned int); + int (*try_fmt_cap)(struct soc_camera_device *, struct v4l2_format *); + int (*get_chip_id)(struct soc_camera_device *, + struct v4l2_chip_ident *); +#ifdef CONFIG_VIDEO_ADV_DEBUG + int (*get_register)(struct soc_camera_device *, struct v4l2_register *); + int (*set_register)(struct soc_camera_device *, struct v4l2_register *); +#endif + const struct soc_camera_data_format *formats; + int num_formats; + int (*get_control)(struct soc_camera_device *, struct v4l2_control *); + int (*set_control)(struct soc_camera_device *, struct v4l2_control *); + const struct v4l2_queryctrl *controls; + int num_controls; + unsigned int(*get_datawidth)(struct soc_camera_device *icd); +}; + +static inline struct v4l2_queryctrl const *soc_camera_find_qctrl( + struct soc_camera_ops *ops, int id) +{ + int i; + + for (i = 0; i < ops->num_controls; i++) + if (ops->controls[i].id == id) + return &ops->controls[i]; + + return NULL; +} + +#define IS_MASTER (1<<0) +#define IS_HSYNC_ACTIVE_HIGH (1<<1) +#define IS_VSYNC_ACTIVE_HIGH (1<<2) +#define IS_DATAWIDTH_8 (1<<3) +#define IS_DATAWIDTH_9 (1<<4) +#define IS_DATAWIDTH_10 (1<<5) +#define IS_PCLK_SAMPLE_RISING (1<<6) + +#endif |