--- /dev/null
+/*
+ * 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);
Code Review / kvmfornfv.git / blobdiff