// SPDX-License-Identifier: GPL-2.0
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/*
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* Xilinx Video IP Core
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*
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* Copyright (C) 2013-2015 Ideas on Board
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* Copyright (C) 2013-2015 Xilinx, Inc.
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*
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* Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
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* Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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*/
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#include <linux/clk.h>
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <dt-bindings/media/xilinx-vip.h>
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#include "xilinx-vip.h"
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/* -----------------------------------------------------------------------------
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* Helper functions
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*/
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static const struct xvip_video_format xvip_video_formats[] = {
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{ XVIP_VF_YUV_422, 8, NULL, MEDIA_BUS_FMT_UYVY8_1X16,
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2, V4L2_PIX_FMT_YUYV },
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{ XVIP_VF_YUV_444, 8, NULL, MEDIA_BUS_FMT_VUY8_1X24,
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3, V4L2_PIX_FMT_YUV444 },
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{ XVIP_VF_RBG, 8, NULL, MEDIA_BUS_FMT_RBG888_1X24,
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3, 0 },
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{ XVIP_VF_MONO_SENSOR, 8, "mono", MEDIA_BUS_FMT_Y8_1X8,
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1, V4L2_PIX_FMT_GREY },
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{ XVIP_VF_MONO_SENSOR, 8, "rggb", MEDIA_BUS_FMT_SRGGB8_1X8,
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1, V4L2_PIX_FMT_SRGGB8 },
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{ XVIP_VF_MONO_SENSOR, 8, "grbg", MEDIA_BUS_FMT_SGRBG8_1X8,
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1, V4L2_PIX_FMT_SGRBG8 },
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{ XVIP_VF_MONO_SENSOR, 8, "gbrg", MEDIA_BUS_FMT_SGBRG8_1X8,
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1, V4L2_PIX_FMT_SGBRG8 },
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{ XVIP_VF_MONO_SENSOR, 8, "bggr", MEDIA_BUS_FMT_SBGGR8_1X8,
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1, V4L2_PIX_FMT_SBGGR8 },
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};
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/**
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* xvip_get_format_by_code - Retrieve format information for a media bus code
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* @code: the format media bus code
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*
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* Return: a pointer to the format information structure corresponding to the
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* given V4L2 media bus format @code, or ERR_PTR if no corresponding format can
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* be found.
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*/
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const struct xvip_video_format *xvip_get_format_by_code(unsigned int code)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) {
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const struct xvip_video_format *format = &xvip_video_formats[i];
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if (format->code == code)
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return format;
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}
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return ERR_PTR(-EINVAL);
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}
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EXPORT_SYMBOL_GPL(xvip_get_format_by_code);
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/**
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* xvip_get_format_by_fourcc - Retrieve format information for a 4CC
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* @fourcc: the format 4CC
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*
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* Return: a pointer to the format information structure corresponding to the
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* given V4L2 format @fourcc, or ERR_PTR if no corresponding format can be
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* found.
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*/
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const struct xvip_video_format *xvip_get_format_by_fourcc(u32 fourcc)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) {
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const struct xvip_video_format *format = &xvip_video_formats[i];
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if (format->fourcc == fourcc)
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return format;
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}
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return ERR_PTR(-EINVAL);
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}
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EXPORT_SYMBOL_GPL(xvip_get_format_by_fourcc);
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/**
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* xvip_of_get_format - Parse a device tree node and return format information
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* @node: the device tree node
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*
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* Read the xlnx,video-format, xlnx,video-width and xlnx,cfa-pattern properties
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* from the device tree @node passed as an argument and return the corresponding
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* format information.
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*
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* Return: a pointer to the format information structure corresponding to the
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* format name and width, or ERR_PTR if no corresponding format can be found.
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*/
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const struct xvip_video_format *xvip_of_get_format(struct device_node *node)
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{
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const char *pattern = "mono";
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unsigned int vf_code;
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unsigned int i;
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u32 width;
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int ret;
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ret = of_property_read_u32(node, "xlnx,video-format", &vf_code);
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if (ret < 0)
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return ERR_PTR(ret);
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ret = of_property_read_u32(node, "xlnx,video-width", &width);
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if (ret < 0)
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return ERR_PTR(ret);
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if (vf_code == XVIP_VF_MONO_SENSOR)
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of_property_read_string(node, "xlnx,cfa-pattern", &pattern);
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for (i = 0; i < ARRAY_SIZE(xvip_video_formats); ++i) {
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const struct xvip_video_format *format = &xvip_video_formats[i];
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if (format->vf_code != vf_code || format->width != width)
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continue;
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if (vf_code == XVIP_VF_MONO_SENSOR &&
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strcmp(pattern, format->pattern))
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continue;
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return format;
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}
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return ERR_PTR(-EINVAL);
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}
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EXPORT_SYMBOL_GPL(xvip_of_get_format);
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/**
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* xvip_set_format_size - Set the media bus frame format size
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* @format: V4L2 frame format on media bus
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* @fmt: media bus format
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*
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* Set the media bus frame format size. The width / height from the subdevice
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* format are set to the given media bus format. The new format size is stored
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* in @format. The width and height are clamped using default min / max values.
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*/
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void xvip_set_format_size(struct v4l2_mbus_framefmt *format,
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const struct v4l2_subdev_format *fmt)
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{
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format->width = clamp_t(unsigned int, fmt->format.width,
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XVIP_MIN_WIDTH, XVIP_MAX_WIDTH);
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format->height = clamp_t(unsigned int, fmt->format.height,
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XVIP_MIN_HEIGHT, XVIP_MAX_HEIGHT);
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}
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EXPORT_SYMBOL_GPL(xvip_set_format_size);
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/**
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* xvip_clr_or_set - Clear or set the register with a bitmask
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* @xvip: Xilinx Video IP device
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* @addr: address of register
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* @mask: bitmask to be set or cleared
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* @set: boolean flag indicating whether to set or clear
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*
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* Clear or set the register at address @addr with a bitmask @mask depending on
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* the boolean flag @set. When the flag @set is true, the bitmask is set in
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* the register, otherwise the bitmask is cleared from the register
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* when the flag @set is false.
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*
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* Fox example, this function can be used to set a control with a boolean value
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* requested by users. If the caller knows whether to set or clear in the first
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* place, the caller should call xvip_clr() or xvip_set() directly instead of
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* using this function.
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*/
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void xvip_clr_or_set(struct xvip_device *xvip, u32 addr, u32 mask, bool set)
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{
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u32 reg;
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reg = xvip_read(xvip, addr);
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reg = set ? reg | mask : reg & ~mask;
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xvip_write(xvip, addr, reg);
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}
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EXPORT_SYMBOL_GPL(xvip_clr_or_set);
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/**
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* xvip_clr_and_set - Clear and set the register with a bitmask
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* @xvip: Xilinx Video IP device
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* @addr: address of register
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* @clr: bitmask to be cleared
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* @set: bitmask to be set
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*
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* Clear a bit(s) of mask @clr in the register at address @addr, then set
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* a bit(s) of mask @set in the register after.
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*/
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void xvip_clr_and_set(struct xvip_device *xvip, u32 addr, u32 clr, u32 set)
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{
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u32 reg;
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reg = xvip_read(xvip, addr);
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reg &= ~clr;
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reg |= set;
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xvip_write(xvip, addr, reg);
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}
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EXPORT_SYMBOL_GPL(xvip_clr_and_set);
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int xvip_init_resources(struct xvip_device *xvip)
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{
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struct platform_device *pdev = to_platform_device(xvip->dev);
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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xvip->iomem = devm_ioremap_resource(xvip->dev, res);
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if (IS_ERR(xvip->iomem))
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return PTR_ERR(xvip->iomem);
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xvip->clk = devm_clk_get(xvip->dev, NULL);
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if (IS_ERR(xvip->clk))
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return PTR_ERR(xvip->clk);
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clk_prepare_enable(xvip->clk);
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return 0;
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}
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EXPORT_SYMBOL_GPL(xvip_init_resources);
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void xvip_cleanup_resources(struct xvip_device *xvip)
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{
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clk_disable_unprepare(xvip->clk);
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}
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EXPORT_SYMBOL_GPL(xvip_cleanup_resources);
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/* -----------------------------------------------------------------------------
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* Subdev operations handlers
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*/
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/**
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* xvip_enum_mbus_code - Enumerate the media format code
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* @subdev: V4L2 subdevice
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* @cfg: V4L2 subdev pad configuration
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* @code: returning media bus code
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*
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* Enumerate the media bus code of the subdevice. Return the corresponding
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* pad format code. This function only works for subdevices with fixed format
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* on all pads. Subdevices with multiple format should have their own
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* function to enumerate mbus codes.
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*
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* Return: 0 if the media bus code is found, or -EINVAL if the format index
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* is not valid.
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*/
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int xvip_enum_mbus_code(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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struct v4l2_mbus_framefmt *format;
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/* Enumerating frame sizes based on the active configuration isn't
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* supported yet.
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*/
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if (code->which == V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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if (code->index)
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return -EINVAL;
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format = v4l2_subdev_get_try_format(subdev, cfg, code->pad);
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code->code = format->code;
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return 0;
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}
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EXPORT_SYMBOL_GPL(xvip_enum_mbus_code);
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/**
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* xvip_enum_frame_size - Enumerate the media bus frame size
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* @subdev: V4L2 subdevice
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* @cfg: V4L2 subdev pad configuration
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* @fse: returning media bus frame size
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*
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* This function is a drop-in implementation of the subdev enum_frame_size pad
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* operation. It assumes that the subdevice has one sink pad and one source
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* pad, and that the format on the source pad is always identical to the
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* format on the sink pad. Entities with different requirements need to
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* implement their own enum_frame_size handlers.
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*
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* Return: 0 if the media bus frame size is found, or -EINVAL
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* if the index or the code is not valid.
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*/
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int xvip_enum_frame_size(struct v4l2_subdev *subdev,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_frame_size_enum *fse)
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{
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struct v4l2_mbus_framefmt *format;
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/* Enumerating frame sizes based on the active configuration isn't
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* supported yet.
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*/
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if (fse->which == V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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format = v4l2_subdev_get_try_format(subdev, cfg, fse->pad);
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if (fse->index || fse->code != format->code)
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return -EINVAL;
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if (fse->pad == XVIP_PAD_SINK) {
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fse->min_width = XVIP_MIN_WIDTH;
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fse->max_width = XVIP_MAX_WIDTH;
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fse->min_height = XVIP_MIN_HEIGHT;
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fse->max_height = XVIP_MAX_HEIGHT;
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} else {
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/* The size on the source pad is fixed and always identical to
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* the size on the sink pad.
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*/
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fse->min_width = format->width;
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fse->max_width = format->width;
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fse->min_height = format->height;
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fse->max_height = format->height;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(xvip_enum_frame_size);
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