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- /*
- * 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>
- *
- * 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.
- */
- #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, "4:2:2, packed, YUYV" },
- { XVIP_VF_YUV_444, 8, NULL, MEDIA_BUS_FMT_VUY8_1X24,
- 3, V4L2_PIX_FMT_YUV444, "4:4:4, packed, YUYV" },
- { XVIP_VF_RBG, 8, NULL, MEDIA_BUS_FMT_RBG888_1X24,
- 3, 0, NULL },
- { XVIP_VF_MONO_SENSOR, 8, "mono", MEDIA_BUS_FMT_Y8_1X8,
- 1, V4L2_PIX_FMT_GREY, "Greyscale 8-bit" },
- { XVIP_VF_MONO_SENSOR, 8, "rggb", MEDIA_BUS_FMT_SRGGB8_1X8,
- 1, V4L2_PIX_FMT_SGRBG8, "Bayer 8-bit RGGB" },
- { XVIP_VF_MONO_SENSOR, 8, "grbg", MEDIA_BUS_FMT_SGRBG8_1X8,
- 1, V4L2_PIX_FMT_SGRBG8, "Bayer 8-bit GRBG" },
- { XVIP_VF_MONO_SENSOR, 8, "gbrg", MEDIA_BUS_FMT_SGBRG8_1X8,
- 1, V4L2_PIX_FMT_SGBRG8, "Bayer 8-bit GBRG" },
- { XVIP_VF_MONO_SENSOR, 8, "bggr", MEDIA_BUS_FMT_SBGGR8_1X8,
- 1, V4L2_PIX_FMT_SBGGR8, "Bayer 8-bit BGGR" },
- };
- /**
- * 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 4CC
- * @fourcc: the format 4CC
- *
- * Return: a pointer to the format information structure corresponding to the
- * given V4L2 format @fourcc, or ERR_PTR if no corresponding format can be
- * found.
- */
- 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 ERR_PTR(-EINVAL);
- }
- 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 eample, 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);
- struct resource *res;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- xvip->iomem = devm_ioremap_resource(xvip->dev, res);
- 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
- * @cfg: V4L2 subdev pad configuration
- * @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_pad_config *cfg,
- 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_get_try_format(subdev, cfg, 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
- * @cfg: V4L2 subdev pad configuration
- * @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_pad_config *cfg,
- 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_get_try_format(subdev, cfg, 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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