/* * 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/device.h> #include <linux/mutex.h> #include <linux/pm.h> #include <linux/videodev2.h> #include <media/videobuf-core.h> #include <media/v4l2-device.h> extern struct bus_type soc_camera_bus_type; struct soc_camera_device { struct list_head list; struct device dev; struct device *pdev; /* Platform device */ s32 user_width; s32 user_height; enum v4l2_colorspace colorspace; unsigned char iface; /* Host number */ unsigned char devnum; /* Device number per host */ struct soc_camera_sense *sense; /* See comment in struct definition */ struct soc_camera_ops *ops; struct video_device *vdev; const struct soc_camera_format_xlate *current_fmt; struct soc_camera_format_xlate *user_formats; int num_user_formats; enum v4l2_field field; /* Preserve field over close() */ void *host_priv; /* Per-device host private data */ /* soc_camera.c private count. Only accessed with .video_lock held */ int use_count; struct mutex video_lock; /* Protects device data */ }; struct soc_camera_file { struct soc_camera_device *icd; struct videobuf_queue vb_vidq; }; struct soc_camera_host { struct v4l2_device v4l2_dev; struct list_head list; 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 *); /* * .get_formats() is called for each client device format, but * .put_formats() is only called once. Further, if any of the calls to * .get_formats() fail, .put_formats() will not be called at all, the * failing .get_formats() must then clean up internally. */ int (*get_formats)(struct soc_camera_device *, unsigned int, struct soc_camera_format_xlate *); void (*put_formats)(struct soc_camera_device *); int (*cropcap)(struct soc_camera_device *, struct v4l2_cropcap *); int (*get_crop)(struct soc_camera_device *, struct v4l2_crop *); int (*set_crop)(struct soc_camera_device *, struct v4l2_crop *); int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *); 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); int (*get_ctrl)(struct soc_camera_device *, struct v4l2_control *); int (*set_ctrl)(struct soc_camera_device *, struct v4l2_control *); int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *); int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *); unsigned int (*poll)(struct file *, poll_table *); const struct v4l2_queryctrl *controls; int num_controls; }; #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 i2c_board_info; struct soc_camera_link { /* Camera bus id, used to match a camera and a bus */ int bus_id; /* Per camera SOCAM_SENSOR_* bus flags */ unsigned long flags; int i2c_adapter_id; struct i2c_board_info *board_info; const char *module_name; void *priv; /* * For non-I2C devices platform platform has to provide methods to * add a device to the system and to remove */ int (*add_device)(struct soc_camera_link *, struct device *); void (*del_device)(struct soc_camera_link *); /* Optional callbacks to power on or off and reset the sensor */ int (*power)(struct device *, int); int (*reset)(struct device *); /* * some platforms may support different data widths than the sensors * native ones due to different data line routing. Let the board code * overwrite the width flags. */ int (*set_bus_param)(struct soc_camera_link *, unsigned long flags); unsigned long (*query_bus_param)(struct soc_camera_link *); void (*free_bus)(struct soc_camera_link *); }; static inline struct soc_camera_device *to_soc_camera_dev( const struct device *dev) { return container_of(dev, struct soc_camera_device, dev); } static inline struct soc_camera_host *to_soc_camera_host( const struct device *dev) { struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); return container_of(v4l2_dev, struct soc_camera_host, v4l2_dev); } static inline struct soc_camera_link *to_soc_camera_link( const struct soc_camera_device *icd) { return icd->dev.platform_data; } static inline struct device *to_soc_camera_control( const struct soc_camera_device *icd) { return dev_get_drvdata(&icd->dev); } static inline struct v4l2_subdev *soc_camera_to_subdev( const struct soc_camera_device *icd) { struct device *control = to_soc_camera_control(icd); return dev_get_drvdata(control); } int soc_camera_host_register(struct soc_camera_host *ici); void soc_camera_host_unregister(struct soc_camera_host *ici); const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( struct soc_camera_device *icd, unsigned int fourcc); /** * struct soc_camera_format_xlate - match between host and sensor formats * @code: code of a sensor provided format * @host_fmt: host format after host translation from code * * 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 { enum v4l2_mbus_pixelcode code; const struct soc_mbus_pixelfmt *host_fmt; }; struct soc_camera_ops { int (*suspend)(struct soc_camera_device *, pm_message_t state); int (*resume)(struct soc_camera_device *); unsigned long (*query_bus_param)(struct soc_camera_device *); int (*set_bus_param)(struct soc_camera_device *, unsigned long); int (*enum_input)(struct soc_camera_device *, struct v4l2_input *); 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_4 (1 << 6) #define SOCAM_DATAWIDTH_8 (1 << 7) #define SOCAM_DATAWIDTH_9 (1 << 8) #define SOCAM_DATAWIDTH_10 (1 << 9) #define SOCAM_DATAWIDTH_15 (1 << 10) #define SOCAM_DATAWIDTH_16 (1 << 11) #define SOCAM_PCLK_SAMPLE_RISING (1 << 12) #define SOCAM_PCLK_SAMPLE_FALLING (1 << 13) #define SOCAM_DATA_ACTIVE_HIGH (1 << 14) #define SOCAM_DATA_ACTIVE_LOW (1 << 15) #define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 | SOCAM_DATAWIDTH_8 | \ SOCAM_DATAWIDTH_9 | SOCAM_DATAWIDTH_10 | \ SOCAM_DATAWIDTH_15 | 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, data, buswidth, mode; 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); data = common_flags & (SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW); mode = common_flags & (SOCAM_MASTER | SOCAM_SLAVE); buswidth = common_flags & SOCAM_DATAWIDTH_MASK; return (!hsync || !vsync || !pclk || !data || !mode || !buswidth) ? 0 : common_flags; } static inline void soc_camera_limit_side(int *start, int *length, unsigned int start_min, unsigned int length_min, unsigned int length_max) { if (*length < length_min) *length = length_min; else if (*length > length_max) *length = length_max; if (*start < start_min) *start = start_min; else if (*start > start_min + length_max - *length) *start = start_min + length_max - *length; } extern unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl, unsigned long flags); /* This is only temporary here - until v4l2-subdev begins to link to video_device */ #include <linux/i2c.h> static inline struct video_device *soc_camera_i2c_to_vdev(struct i2c_client *client) { struct soc_camera_device *icd = client->dev.platform_data; return icd->vdev; } #endif