/* * camera image capture (abstract) bus driver header * * Copyright (C) 2006, Sascha Hauer, Pengutronix * Copyright (C) 2008, Guennadi Liakhovetski * * 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 #include #include 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 buswidth; /* See comment in .c */ struct soc_camera_sense *sense; /* See comment in struct definition */ struct soc_camera_ops *ops; struct video_device *vdev; const struct soc_camera_data_format *current_fmt; const struct soc_camera_data_format *formats; int num_formats; struct soc_camera_format_xlate *user_formats; int num_user_formats; struct module *owner; void *host_priv; /* per-device host private data */ /* soc_camera.c private count. Only accessed with video_lock held */ int use_count; }; 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 */ void *priv; const char *drv_name; struct soc_camera_host_ops *ops; }; struct soc_camera_host_ops { struct module *owner; int (*add)(struct soc_camera_device *); void (*remove)(struct soc_camera_device *); int (*suspend)(struct soc_camera_device *, pm_message_t); int (*resume)(struct soc_camera_device *); int (*get_formats)(struct soc_camera_device *, int, struct soc_camera_format_xlate *); int (*set_fmt)(struct soc_camera_device *, __u32, struct v4l2_rect *); int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *); void (*init_videobuf)(struct videobuf_queue *, struct soc_camera_device *); int (*reqbufs)(struct soc_camera_file *, struct v4l2_requestbuffers *); int (*querycap)(struct soc_camera_host *, struct v4l2_capability *); int (*set_bus_param)(struct soc_camera_device *, __u32); unsigned int (*poll)(struct file *, poll_table *); }; #define SOCAM_SENSOR_INVERT_PCLK (1 << 0) #define SOCAM_SENSOR_INVERT_MCLK (1 << 1) #define SOCAM_SENSOR_INVERT_HSYNC (1 << 2) #define SOCAM_SENSOR_INVERT_VSYNC (1 << 3) #define SOCAM_SENSOR_INVERT_DATA (1 << 4) 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; /* Per camera SOCAM_SENSOR_* bus flags */ unsigned long flags; /* Optional callbacks to power on or off and reset the sensor */ int (*power)(struct device *, int); int (*reset)(struct device *); }; 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); 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); extern const struct soc_camera_data_format *soc_camera_format_by_fourcc( struct soc_camera_device *icd, unsigned int fourcc); extern const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( struct soc_camera_device *icd, unsigned int fourcc); struct soc_camera_data_format { const char *name; unsigned int depth; __u32 fourcc; enum v4l2_colorspace colorspace; }; /** * struct soc_camera_format_xlate - match between host and sensor formats * @cam_fmt: sensor format provided by the sensor * @host_fmt: host format after host translation from cam_fmt * @buswidth: bus width for this format * * Host and sensor translation structure. Used in table of host and sensor * formats matchings in soc_camera_device. A host can override the generic list * generation by implementing get_formats(), and use it for format checks and * format setup. */ struct soc_camera_format_xlate { const struct soc_camera_data_format *cam_fmt; const struct soc_camera_data_format *host_fmt; unsigned char buswidth; }; struct soc_camera_ops { struct module *owner; int (*probe)(struct soc_camera_device *); void (*remove)(struct soc_camera_device *); int (*suspend)(struct soc_camera_device *, pm_message_t state); int (*resume)(struct soc_camera_device *); 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_fmt)(struct soc_camera_device *, __u32, struct v4l2_rect *); int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *); unsigned long (*query_bus_param)(struct soc_camera_device *); int (*set_bus_param)(struct soc_camera_device *, unsigned long); 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 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; }; #define SOCAM_SENSE_PCLK_CHANGED (1 << 0) /** * This struct can be attached to struct soc_camera_device by the host driver * to request sense from the camera, for example, when calling .set_fmt(). The * host then can check which flags are set and verify respective values if any. * For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has * changed during this operation. After completion the host should detach sense. * * @flags ored SOCAM_SENSE_* flags * @master_clock if the host wants to be informed about pixel-clock * change, it better set master_clock. * @pixel_clock_max maximum pixel clock frequency supported by the host, * camera is not allowed to exceed this. * @pixel_clock if the camera driver changed pixel clock during this * operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses * master_clock to calculate the new pixel-clock and * sets this field. */ struct soc_camera_sense { unsigned long flags; unsigned long master_clock; unsigned long pixel_clock_max; unsigned long pixel_clock; }; 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 SOCAM_MASTER (1 << 0) #define SOCAM_SLAVE (1 << 1) #define SOCAM_HSYNC_ACTIVE_HIGH (1 << 2) #define SOCAM_HSYNC_ACTIVE_LOW (1 << 3) #define SOCAM_VSYNC_ACTIVE_HIGH (1 << 4) #define SOCAM_VSYNC_ACTIVE_LOW (1 << 5) #define SOCAM_DATAWIDTH_8 (1 << 6) #define SOCAM_DATAWIDTH_9 (1 << 7) #define SOCAM_DATAWIDTH_10 (1 << 8) #define SOCAM_DATAWIDTH_16 (1 << 9) #define SOCAM_PCLK_SAMPLE_RISING (1 << 10) #define SOCAM_PCLK_SAMPLE_FALLING (1 << 11) #define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_9 | \ SOCAM_DATAWIDTH_10 | SOCAM_DATAWIDTH_16) static inline unsigned long soc_camera_bus_param_compatible( unsigned long camera_flags, unsigned long bus_flags) { unsigned long common_flags, hsync, vsync, pclk; common_flags = camera_flags & bus_flags; hsync = common_flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW); vsync = common_flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW); pclk = common_flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING); return (!hsync || !vsync || !pclk) ? 0 : common_flags; } extern unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, unsigned long flags); #endif