// SPDX-License-Identifier: GPL-2.0
/*
* Xilinx Video IP Core
*
* Copyright ( C ) 2013 - 2015 Ideas on Board
* Copyright ( C ) 2013 - 2015 Xilinx , Inc .
*
* Contacts : Hyun Kwon < hyun . kwon @ xilinx . com >
* Laurent Pinchart < laurent . pinchart @ ideasonboard . com >
*/
#include <linux/clk.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <dt-bindings/media/xilinx-vip.h>
#include "xilinx-vip.h"
/* -----------------------------------------------------------------------------
* Helper functions
*/
static const struct xvip_video_format xvip_video_formats[] = {
{ XVIP_VF_YUV_422, 8 , NULL, MEDIA_BUS_FMT_UYVY8_1X16,
2 , V4L2_PIX_FMT_YUYV },
{ XVIP_VF_YUV_444, 8 , NULL, MEDIA_BUS_FMT_VUY8_1X24,
3 , V4L2_PIX_FMT_YUV444 },
{ XVIP_VF_RBG, 8 , NULL, MEDIA_BUS_FMT_RBG888_1X24,
3 , 0 },
{ XVIP_VF_MONO_SENSOR, 8 , "mono" , MEDIA_BUS_FMT_Y8_1X8,
1 , V4L2_PIX_FMT_GREY },
{ XVIP_VF_MONO_SENSOR, 8 , "rggb" , MEDIA_BUS_FMT_SRGGB8_1X8,
1 , V4L2_PIX_FMT_SRGGB8 },
{ XVIP_VF_MONO_SENSOR, 8 , "grbg" , MEDIA_BUS_FMT_SGRBG8_1X8,
1 , V4L2_PIX_FMT_SGRBG8 },
{ XVIP_VF_MONO_SENSOR, 8 , "gbrg" , MEDIA_BUS_FMT_SGBRG8_1X8,
1 , V4L2_PIX_FMT_SGBRG8 },
{ XVIP_VF_MONO_SENSOR, 8 , "bggr" , MEDIA_BUS_FMT_SBGGR8_1X8,
1 , V4L2_PIX_FMT_SBGGR8 },
{ XVIP_VF_MONO_SENSOR, 12 , "mono" , MEDIA_BUS_FMT_Y12_1X12,
2 , V4L2_PIX_FMT_Y12 },
};
/**
* xvip_get_format_by_code - Retrieve format information for a media bus code
* @ code : the format media bus code
*
* Return : a pointer to the format information structure corresponding to the
* given V4L2 media bus format @ code , or ERR_PTR if no corresponding format can
* be found .
*/
const struct xvip_video_format *xvip_get_format_by_code(unsigned int code)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(xvip_video_formats); ++i) {
const struct xvip_video_format *format = &xvip_video_formats[i];
if (format->code == code)
return format;
}
return ERR_PTR(-EINVAL);
}
EXPORT_SYMBOL_GPL(xvip_get_format_by_code);
/**
* xvip_get_format_by_fourcc - Retrieve format information for a 4 CC
* @ fourcc : the format 4 CC
*
* Return : a pointer to the format information structure corresponding to the
* given V4L2 format @ fourcc . If not found , return a pointer to the first
* available format ( V4L2_PIX_FMT_YUYV ) .
*/
const struct xvip_video_format *xvip_get_format_by_fourcc(u32 fourcc)
{
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(xvip_video_formats); ++i) {
const struct xvip_video_format *format = &xvip_video_formats[i];
if (format->fourcc == fourcc)
return format;
}
return &xvip_video_formats[0 ];
}
EXPORT_SYMBOL_GPL(xvip_get_format_by_fourcc);
/**
* xvip_of_get_format - Parse a device tree node and return format information
* @ node : the device tree node
*
* Read the xlnx , video - format , xlnx , video - width and xlnx , cfa - pattern properties
* from the device tree @ node passed as an argument and return the corresponding
* format information .
*
* Return : a pointer to the format information structure corresponding to the
* format name and width , or ERR_PTR if no corresponding format can be found .
*/
const struct xvip_video_format *xvip_of_get_format(struct device_node *node)
{
const char *pattern = "mono" ;
unsigned int vf_code;
unsigned int i;
u32 width;
int ret;
ret = of_property_read_u32(node, "xlnx,video-format" , &vf_code);
if (ret < 0 )
return ERR_PTR(ret);
ret = of_property_read_u32(node, "xlnx,video-width" , &width);
if (ret < 0 )
return ERR_PTR(ret);
if (vf_code == XVIP_VF_MONO_SENSOR)
of_property_read_string(node, "xlnx,cfa-pattern" , &pattern);
for (i = 0 ; i < ARRAY_SIZE(xvip_video_formats); ++i) {
const struct xvip_video_format *format = &xvip_video_formats[i];
if (format->vf_code != vf_code || format->width != width)
continue ;
if (vf_code == XVIP_VF_MONO_SENSOR &&
strcmp(pattern, format->pattern))
continue ;
return format;
}
return ERR_PTR(-EINVAL);
}
EXPORT_SYMBOL_GPL(xvip_of_get_format);
/**
* xvip_set_format_size - Set the media bus frame format size
* @ format : V4L2 frame format on media bus
* @ fmt : media bus format
*
* Set the media bus frame format size . The width / height from the subdevice
* format are set to the given media bus format . The new format size is stored
* in @ format . The width and height are clamped using default min / max values .
*/
void xvip_set_format_size(struct v4l2_mbus_framefmt *format,
const struct v4l2_subdev_format *fmt)
{
format->width = clamp_t(unsigned int , fmt->format.width,
XVIP_MIN_WIDTH, XVIP_MAX_WIDTH);
format->height = clamp_t(unsigned int , fmt->format.height,
XVIP_MIN_HEIGHT, XVIP_MAX_HEIGHT);
}
EXPORT_SYMBOL_GPL(xvip_set_format_size);
/**
* xvip_clr_or_set - Clear or set the register with a bitmask
* @ xvip : Xilinx Video IP device
* @ addr : address of register
* @ mask : bitmask to be set or cleared
* @ set : boolean flag indicating whether to set or clear
*
* Clear or set the register at address @ addr with a bitmask @ mask depending on
* the boolean flag @ set . When the flag @ set is true , the bitmask is set in
* the register , otherwise the bitmask is cleared from the register
* when the flag @ set is false .
*
* Fox example , this function can be used to set a control with a boolean value
* requested by users . If the caller knows whether to set or clear in the first
* place , the caller should call xvip_clr ( ) or xvip_set ( ) directly instead of
* using this function .
*/
void xvip_clr_or_set(struct xvip_device *xvip, u32 addr, u32 mask, bool set)
{
u32 reg;
reg = xvip_read(xvip, addr);
reg = set ? reg | mask : reg & ~mask;
xvip_write(xvip, addr, reg);
}
EXPORT_SYMBOL_GPL(xvip_clr_or_set);
/**
* xvip_clr_and_set - Clear and set the register with a bitmask
* @ xvip : Xilinx Video IP device
* @ addr : address of register
* @ clr : bitmask to be cleared
* @ set : bitmask to be set
*
* Clear a bit ( s ) of mask @ clr in the register at address @ addr , then set
* a bit ( s ) of mask @ set in the register after .
*/
void xvip_clr_and_set(struct xvip_device *xvip, u32 addr, u32 clr, u32 set)
{
u32 reg;
reg = xvip_read(xvip, addr);
reg &= ~clr;
reg |= set;
xvip_write(xvip, addr, reg);
}
EXPORT_SYMBOL_GPL(xvip_clr_and_set);
int xvip_init_resources(struct xvip_device *xvip)
{
struct platform_device *pdev = to_platform_device(xvip->dev);
xvip->iomem = devm_platform_ioremap_resource(pdev, 0 );
if (IS_ERR(xvip->iomem))
return PTR_ERR(xvip->iomem);
xvip->clk = devm_clk_get(xvip->dev, NULL);
if (IS_ERR(xvip->clk))
return PTR_ERR(xvip->clk);
clk_prepare_enable(xvip->clk);
return 0 ;
}
EXPORT_SYMBOL_GPL(xvip_init_resources);
void xvip_cleanup_resources(struct xvip_device *xvip)
{
clk_disable_unprepare(xvip->clk);
}
EXPORT_SYMBOL_GPL(xvip_cleanup_resources);
/* -----------------------------------------------------------------------------
* Subdev operations handlers
*/
/**
* xvip_enum_mbus_code - Enumerate the media format code
* @ subdev : V4L2 subdevice
* @ sd_state : V4L2 subdev state
* @ code : returning media bus code
*
* Enumerate the media bus code of the subdevice . Return the corresponding
* pad format code . This function only works for subdevices with fixed format
* on all pads . Subdevices with multiple format should have their own
* function to enumerate mbus codes .
*
* Return : 0 if the media bus code is found , or - EINVAL if the format index
* is not valid .
*/
int xvip_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct v4l2_mbus_framefmt *format;
/* Enumerating frame sizes based on the active configuration isn't
* supported yet .
*/
if (code->which == V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
if (code->index)
return -EINVAL;
format = v4l2_subdev_state_get_format(sd_state, code->pad);
code->code = format->code;
return 0 ;
}
EXPORT_SYMBOL_GPL(xvip_enum_mbus_code);
/**
* xvip_enum_frame_size - Enumerate the media bus frame size
* @ subdev : V4L2 subdevice
* @ sd_state : V4L2 subdev state
* @ fse : returning media bus frame size
*
* This function is a drop - in implementation of the subdev enum_frame_size pad
* operation . It assumes that the subdevice has one sink pad and one source
* pad , and that the format on the source pad is always identical to the
* format on the sink pad . Entities with different requirements need to
* implement their own enum_frame_size handlers .
*
* Return : 0 if the media bus frame size is found , or - EINVAL
* if the index or the code is not valid .
*/
int xvip_enum_frame_size(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
struct v4l2_mbus_framefmt *format;
/* Enumerating frame sizes based on the active configuration isn't
* supported yet .
*/
if (fse->which == V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
format = v4l2_subdev_state_get_format(sd_state, fse->pad);
if (fse->index || fse->code != format->code)
return -EINVAL;
if (fse->pad == XVIP_PAD_SINK) {
fse->min_width = XVIP_MIN_WIDTH;
fse->max_width = XVIP_MAX_WIDTH;
fse->min_height = XVIP_MIN_HEIGHT;
fse->max_height = XVIP_MAX_HEIGHT;
} else {
/* The size on the source pad is fixed and always identical to
* the size on the sink pad .
*/
fse->min_width = format->width;
fse->max_width = format->width;
fse->min_height = format->height;
fse->max_height = format->height;
}
return 0 ;
}
EXPORT_SYMBOL_GPL(xvip_enum_frame_size);
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