| // 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, "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_SRGGB8, "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); |