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author | Yong Deng <yong.deng@magewell.com> | 2018-10-30 04:18:10 -0400 |
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committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-11-23 05:15:59 -0500 |
commit | 5cc7522d89655770a4b838ea77aeedf62f151891 (patch) | |
tree | c689a93c463fcbd2f0f6e2c60beb153ceb7af25b | |
parent | d959c40f370e9c072a575db08415c7e258796424 (diff) | |
download | linux-5cc7522d89655770a4b838ea77aeedf62f151891.tar.gz linux-5cc7522d89655770a4b838ea77aeedf62f151891.tar.bz2 linux-5cc7522d89655770a4b838ea77aeedf62f151891.zip |
media: sun6i: Add support for Allwinner CSI V3s
Allwinner V3s SoC features a CSI module with parallel interface.
This patch implement a v4l2 framework driver for it.
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Tested-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Yong Deng <yong.deng@magewell.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
-rw-r--r-- | drivers/media/platform/Kconfig | 1 | ||||
-rw-r--r-- | drivers/media/platform/Makefile | 2 | ||||
-rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/Kconfig | 9 | ||||
-rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/Makefile | 3 | ||||
-rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 912 | ||||
-rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h | 135 | ||||
-rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_reg.h | 196 | ||||
-rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c | 678 | ||||
-rw-r--r-- | drivers/media/platform/sunxi/sun6i-csi/sun6i_video.h | 38 |
9 files changed, 1974 insertions, 0 deletions
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 2667df2b486e..ea3306341edf 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -138,6 +138,7 @@ source "drivers/media/platform/am437x/Kconfig" source "drivers/media/platform/xilinx/Kconfig" source "drivers/media/platform/rcar-vin/Kconfig" source "drivers/media/platform/atmel/Kconfig" +source "drivers/media/platform/sunxi/sun6i-csi/Kconfig" config VIDEO_TI_CAL tristate "TI CAL (Camera Adaptation Layer) driver" diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index 81aad4931734..d347a556522e 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -100,3 +100,5 @@ obj-$(CONFIG_VIDEO_QCOM_VENUS) += qcom/venus/ obj-y += meson/ obj-y += cros-ec-cec/ + +obj-$(CONFIG_VIDEO_SUN6I_CSI) += sunxi/sun6i-csi/ diff --git a/drivers/media/platform/sunxi/sun6i-csi/Kconfig b/drivers/media/platform/sunxi/sun6i-csi/Kconfig new file mode 100644 index 000000000000..018e3ec788c0 --- /dev/null +++ b/drivers/media/platform/sunxi/sun6i-csi/Kconfig @@ -0,0 +1,9 @@ +config VIDEO_SUN6I_CSI + tristate "Allwinner V3s Camera Sensor Interface driver" + depends on VIDEO_V4L2 && COMMON_CLK && VIDEO_V4L2_SUBDEV_API && HAS_DMA + depends on ARCH_SUNXI || COMPILE_TEST + select VIDEOBUF2_DMA_CONTIG + select REGMAP_MMIO + select V4L2_FWNODE + help + Support for the Allwinner Camera Sensor Interface Controller on V3s. diff --git a/drivers/media/platform/sunxi/sun6i-csi/Makefile b/drivers/media/platform/sunxi/sun6i-csi/Makefile new file mode 100644 index 000000000000..213cb6be9e9c --- /dev/null +++ b/drivers/media/platform/sunxi/sun6i-csi/Makefile @@ -0,0 +1,3 @@ +sun6i-csi-y += sun6i_video.o sun6i_csi.o + +obj-$(CONFIG_VIDEO_SUN6I_CSI) += sun6i-csi.o diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c new file mode 100644 index 000000000000..7af55ad142dc --- /dev/null +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c @@ -0,0 +1,912 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing) + * All rights reserved. + * Author: Yong Deng <yong.deng@magewell.com> + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/fs.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/ioctl.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/sched.h> +#include <linux/sizes.h> +#include <linux/slab.h> + +#include "sun6i_csi.h" +#include "sun6i_csi_reg.h" + +#define MODULE_NAME "sun6i-csi" + +struct sun6i_csi_dev { + struct sun6i_csi csi; + struct device *dev; + + struct regmap *regmap; + struct clk *clk_mod; + struct clk *clk_ram; + struct reset_control *rstc_bus; + + int planar_offset[3]; +}; + +static inline struct sun6i_csi_dev *sun6i_csi_to_dev(struct sun6i_csi *csi) +{ + return container_of(csi, struct sun6i_csi_dev, csi); +} + +/* TODO add 10&12 bit YUV, RGB support */ +bool sun6i_csi_is_format_supported(struct sun6i_csi *csi, + u32 pixformat, u32 mbus_code) +{ + struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi); + + /* + * Some video receivers have the ability to be compatible with + * 8bit and 16bit bus width. + * Identify the media bus format from device tree. + */ + if ((sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_PARALLEL + || sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_BT656) + && sdev->csi.v4l2_ep.bus.parallel.bus_width == 16) { + switch (pixformat) { + case V4L2_PIX_FMT_HM12: + case V4L2_PIX_FMT_NV12: + case V4L2_PIX_FMT_NV21: + case V4L2_PIX_FMT_NV16: + case V4L2_PIX_FMT_NV61: + case V4L2_PIX_FMT_YUV420: + case V4L2_PIX_FMT_YVU420: + case V4L2_PIX_FMT_YUV422P: + switch (mbus_code) { + case MEDIA_BUS_FMT_UYVY8_1X16: + case MEDIA_BUS_FMT_VYUY8_1X16: + case MEDIA_BUS_FMT_YUYV8_1X16: + case MEDIA_BUS_FMT_YVYU8_1X16: + return true; + default: + dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n", + mbus_code); + break; + } + break; + default: + dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n", + pixformat); + break; + } + return false; + } + + switch (pixformat) { + case V4L2_PIX_FMT_SBGGR8: + return (mbus_code == MEDIA_BUS_FMT_SBGGR8_1X8); + case V4L2_PIX_FMT_SGBRG8: + return (mbus_code == MEDIA_BUS_FMT_SGBRG8_1X8); + case V4L2_PIX_FMT_SGRBG8: + return (mbus_code == MEDIA_BUS_FMT_SGRBG8_1X8); + case V4L2_PIX_FMT_SRGGB8: + return (mbus_code == MEDIA_BUS_FMT_SRGGB8_1X8); + case V4L2_PIX_FMT_SBGGR10: + return (mbus_code == MEDIA_BUS_FMT_SBGGR10_1X10); + case V4L2_PIX_FMT_SGBRG10: + return (mbus_code == MEDIA_BUS_FMT_SGBRG10_1X10); + case V4L2_PIX_FMT_SGRBG10: + return (mbus_code == MEDIA_BUS_FMT_SGRBG10_1X10); + case V4L2_PIX_FMT_SRGGB10: + return (mbus_code == MEDIA_BUS_FMT_SRGGB10_1X10); + case V4L2_PIX_FMT_SBGGR12: + return (mbus_code == MEDIA_BUS_FMT_SBGGR12_1X12); + case V4L2_PIX_FMT_SGBRG12: + return (mbus_code == MEDIA_BUS_FMT_SGBRG12_1X12); + case V4L2_PIX_FMT_SGRBG12: + return (mbus_code == MEDIA_BUS_FMT_SGRBG12_1X12); + case V4L2_PIX_FMT_SRGGB12: + return (mbus_code == MEDIA_BUS_FMT_SRGGB12_1X12); + + case V4L2_PIX_FMT_YUYV: + return (mbus_code == MEDIA_BUS_FMT_YUYV8_2X8); + case V4L2_PIX_FMT_YVYU: + return (mbus_code == MEDIA_BUS_FMT_YVYU8_2X8); + case V4L2_PIX_FMT_UYVY: + return (mbus_code == MEDIA_BUS_FMT_UYVY8_2X8); + case V4L2_PIX_FMT_VYUY: + return (mbus_code == MEDIA_BUS_FMT_VYUY8_2X8); + + case V4L2_PIX_FMT_HM12: + case V4L2_PIX_FMT_NV12: + case V4L2_PIX_FMT_NV21: + case V4L2_PIX_FMT_NV16: + case V4L2_PIX_FMT_NV61: + case V4L2_PIX_FMT_YUV420: + case V4L2_PIX_FMT_YVU420: + case V4L2_PIX_FMT_YUV422P: + switch (mbus_code) { + case MEDIA_BUS_FMT_UYVY8_2X8: + case MEDIA_BUS_FMT_VYUY8_2X8: + case MEDIA_BUS_FMT_YUYV8_2X8: + case MEDIA_BUS_FMT_YVYU8_2X8: + return true; + default: + dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n", + mbus_code); + break; + } + break; + default: + dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat); + break; + } + + return false; +} + +int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable) +{ + struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi); + struct regmap *regmap = sdev->regmap; + int ret; + + if (!enable) { + regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0); + + clk_disable_unprepare(sdev->clk_ram); + clk_disable_unprepare(sdev->clk_mod); + reset_control_assert(sdev->rstc_bus); + return 0; + } + + ret = clk_prepare_enable(sdev->clk_mod); + if (ret) { + dev_err(sdev->dev, "Enable csi clk err %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(sdev->clk_ram); + if (ret) { + dev_err(sdev->dev, "Enable clk_dram_csi clk err %d\n", ret); + goto clk_mod_disable; + } + + ret = reset_control_deassert(sdev->rstc_bus); + if (ret) { + dev_err(sdev->dev, "reset err %d\n", ret); + goto clk_ram_disable; + } + + regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, CSI_EN_CSI_EN); + + return 0; + +clk_ram_disable: + clk_disable_unprepare(sdev->clk_ram); +clk_mod_disable: + clk_disable_unprepare(sdev->clk_mod); + return ret; +} + +static enum csi_input_fmt get_csi_input_format(struct sun6i_csi_dev *sdev, + u32 mbus_code, u32 pixformat) +{ + /* bayer */ + if ((mbus_code & 0xF000) == 0x3000) + return CSI_INPUT_FORMAT_RAW; + + switch (pixformat) { + case V4L2_PIX_FMT_YUYV: + case V4L2_PIX_FMT_YVYU: + case V4L2_PIX_FMT_UYVY: + case V4L2_PIX_FMT_VYUY: + return CSI_INPUT_FORMAT_RAW; + default: + break; + } + + /* not support YUV420 input format yet */ + dev_dbg(sdev->dev, "Select YUV422 as default input format of CSI.\n"); + return CSI_INPUT_FORMAT_YUV422; +} + +static enum csi_output_fmt get_csi_output_format(struct sun6i_csi_dev *sdev, + u32 pixformat, u32 field) +{ + bool buf_interlaced = false; + + if (field == V4L2_FIELD_INTERLACED + || field == V4L2_FIELD_INTERLACED_TB + || field == V4L2_FIELD_INTERLACED_BT) + buf_interlaced = true; + + switch (pixformat) { + case V4L2_PIX_FMT_SBGGR8: + case V4L2_PIX_FMT_SGBRG8: + case V4L2_PIX_FMT_SGRBG8: + case V4L2_PIX_FMT_SRGGB8: + return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8; + case V4L2_PIX_FMT_SBGGR10: + case V4L2_PIX_FMT_SGBRG10: + case V4L2_PIX_FMT_SGRBG10: + case V4L2_PIX_FMT_SRGGB10: + return buf_interlaced ? CSI_FRAME_RAW_10 : CSI_FIELD_RAW_10; + case V4L2_PIX_FMT_SBGGR12: + case V4L2_PIX_FMT_SGBRG12: + case V4L2_PIX_FMT_SGRBG12: + case V4L2_PIX_FMT_SRGGB12: + return buf_interlaced ? CSI_FRAME_RAW_12 : CSI_FIELD_RAW_12; + + case V4L2_PIX_FMT_YUYV: + case V4L2_PIX_FMT_YVYU: + case V4L2_PIX_FMT_UYVY: + case V4L2_PIX_FMT_VYUY: + return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8; + + case V4L2_PIX_FMT_HM12: + return buf_interlaced ? CSI_FRAME_MB_YUV420 : + CSI_FIELD_MB_YUV420; + case V4L2_PIX_FMT_NV12: + case V4L2_PIX_FMT_NV21: + return buf_interlaced ? CSI_FRAME_UV_CB_YUV420 : + CSI_FIELD_UV_CB_YUV420; + case V4L2_PIX_FMT_YUV420: + case V4L2_PIX_FMT_YVU420: + return buf_interlaced ? CSI_FRAME_PLANAR_YUV420 : + CSI_FIELD_PLANAR_YUV420; + case V4L2_PIX_FMT_NV16: + case V4L2_PIX_FMT_NV61: + return buf_interlaced ? CSI_FRAME_UV_CB_YUV422 : + CSI_FIELD_UV_CB_YUV422; + case V4L2_PIX_FMT_YUV422P: + return buf_interlaced ? CSI_FRAME_PLANAR_YUV422 : + CSI_FIELD_PLANAR_YUV422; + default: + dev_warn(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat); + break; + } + + return CSI_FIELD_RAW_8; +} + +static enum csi_input_seq get_csi_input_seq(struct sun6i_csi_dev *sdev, + u32 mbus_code, u32 pixformat) +{ + + switch (pixformat) { + case V4L2_PIX_FMT_HM12: + case V4L2_PIX_FMT_NV12: + case V4L2_PIX_FMT_NV16: + case V4L2_PIX_FMT_YUV420: + case V4L2_PIX_FMT_YUV422P: + switch (mbus_code) { + case MEDIA_BUS_FMT_UYVY8_2X8: + case MEDIA_BUS_FMT_UYVY8_1X16: + return CSI_INPUT_SEQ_UYVY; + case MEDIA_BUS_FMT_VYUY8_2X8: + case MEDIA_BUS_FMT_VYUY8_1X16: + return CSI_INPUT_SEQ_VYUY; + case MEDIA_BUS_FMT_YUYV8_2X8: + case MEDIA_BUS_FMT_YUYV8_1X16: + return CSI_INPUT_SEQ_YUYV; + case MEDIA_BUS_FMT_YVYU8_1X16: + case MEDIA_BUS_FMT_YVYU8_2X8: + return CSI_INPUT_SEQ_YVYU; + default: + dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n", + mbus_code); + break; + } + break; + case V4L2_PIX_FMT_NV21: + case V4L2_PIX_FMT_NV61: + case V4L2_PIX_FMT_YVU420: + switch (mbus_code) { + case MEDIA_BUS_FMT_UYVY8_2X8: + case MEDIA_BUS_FMT_UYVY8_1X16: + return CSI_INPUT_SEQ_VYUY; + case MEDIA_BUS_FMT_VYUY8_2X8: + case MEDIA_BUS_FMT_VYUY8_1X16: + return CSI_INPUT_SEQ_UYVY; + case MEDIA_BUS_FMT_YUYV8_2X8: + case MEDIA_BUS_FMT_YUYV8_1X16: + return CSI_INPUT_SEQ_YVYU; + case MEDIA_BUS_FMT_YVYU8_1X16: + case MEDIA_BUS_FMT_YVYU8_2X8: + return CSI_INPUT_SEQ_YUYV; + default: + dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n", + mbus_code); + break; + } + break; + + case V4L2_PIX_FMT_YUYV: + return CSI_INPUT_SEQ_YUYV; + + default: + dev_warn(sdev->dev, "Unsupported pixformat: 0x%x, defaulting to YUYV\n", + pixformat); + break; + } + + return CSI_INPUT_SEQ_YUYV; +} + +static void sun6i_csi_setup_bus(struct sun6i_csi_dev *sdev) +{ + struct v4l2_fwnode_endpoint *endpoint = &sdev->csi.v4l2_ep; + struct sun6i_csi *csi = &sdev->csi; + unsigned char bus_width; + u32 flags; + u32 cfg; + bool input_interlaced = false; + + if (csi->config.field == V4L2_FIELD_INTERLACED + || csi->config.field == V4L2_FIELD_INTERLACED_TB + || csi->config.field == V4L2_FIELD_INTERLACED_BT) + input_interlaced = true; + + bus_width = endpoint->bus.parallel.bus_width; + + regmap_read(sdev->regmap, CSI_IF_CFG_REG, &cfg); + + cfg &= ~(CSI_IF_CFG_CSI_IF_MASK | CSI_IF_CFG_MIPI_IF_MASK | + CSI_IF_CFG_IF_DATA_WIDTH_MASK | + CSI_IF_CFG_CLK_POL_MASK | CSI_IF_CFG_VREF_POL_MASK | + CSI_IF_CFG_HREF_POL_MASK | CSI_IF_CFG_FIELD_MASK | + CSI_IF_CFG_SRC_TYPE_MASK); + + if (input_interlaced) + cfg |= CSI_IF_CFG_SRC_TYPE_INTERLACED; + else + cfg |= CSI_IF_CFG_SRC_TYPE_PROGRESSED; + + switch (endpoint->bus_type) { + case V4L2_MBUS_PARALLEL: + cfg |= CSI_IF_CFG_MIPI_IF_CSI; + + flags = endpoint->bus.parallel.flags; + + cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_YUV422_16BIT : + CSI_IF_CFG_CSI_IF_YUV422_INTLV; + + if (flags & V4L2_MBUS_FIELD_EVEN_LOW) + cfg |= CSI_IF_CFG_FIELD_POSITIVE; + + if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) + cfg |= CSI_IF_CFG_VREF_POL_POSITIVE; + if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) + cfg |= CSI_IF_CFG_HREF_POL_POSITIVE; + + if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING) + cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE; + break; + case V4L2_MBUS_BT656: + cfg |= CSI_IF_CFG_MIPI_IF_CSI; + + flags = endpoint->bus.parallel.flags; + + cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_BT1120 : + CSI_IF_CFG_CSI_IF_BT656; + + if (flags & V4L2_MBUS_FIELD_EVEN_LOW) + cfg |= CSI_IF_CFG_FIELD_POSITIVE; + + if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) + cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE; + break; + default: + dev_warn(sdev->dev, "Unsupported bus type: %d\n", + endpoint->bus_type); + break; + } + + switch (bus_width) { + case 8: + cfg |= CSI_IF_CFG_IF_DATA_WIDTH_8BIT; + break; + case 10: + cfg |= CSI_IF_CFG_IF_DATA_WIDTH_10BIT; + break; + case 12: + cfg |= CSI_IF_CFG_IF_DATA_WIDTH_12BIT; + break; + case 16: /* No need to configure DATA_WIDTH for 16bit */ + break; + default: + dev_warn(sdev->dev, "Unsupported bus width: %u\n", bus_width); + break; + } + + regmap_write(sdev->regmap, CSI_IF_CFG_REG, cfg); +} + +static void sun6i_csi_set_format(struct sun6i_csi_dev *sdev) +{ + struct sun6i_csi *csi = &sdev->csi; + u32 cfg; + u32 val; + + regmap_read(sdev->regmap, CSI_CH_CFG_REG, &cfg); + + cfg &= ~(CSI_CH_CFG_INPUT_FMT_MASK | + CSI_CH_CFG_OUTPUT_FMT_MASK | CSI_CH_CFG_VFLIP_EN | + CSI_CH_CFG_HFLIP_EN | CSI_CH_CFG_FIELD_SEL_MASK | + CSI_CH_CFG_INPUT_SEQ_MASK); + + val = get_csi_input_format(sdev, csi->config.code, + csi->config.pixelformat); + cfg |= CSI_CH_CFG_INPUT_FMT(val); + + val = get_csi_output_format(sdev, csi->config.pixelformat, + csi->config.field); + cfg |= CSI_CH_CFG_OUTPUT_FMT(val); + + val = get_csi_input_seq(sdev, csi->config.code, + csi->config.pixelformat); + cfg |= CSI_CH_CFG_INPUT_SEQ(val); + + if (csi->config.field == V4L2_FIELD_TOP) + cfg |= CSI_CH_CFG_FIELD_SEL_FIELD0; + else if (csi->config.field == V4L2_FIELD_BOTTOM) + cfg |= CSI_CH_CFG_FIELD_SEL_FIELD1; + else + cfg |= CSI_CH_CFG_FIELD_SEL_BOTH; + + regmap_write(sdev->regmap, CSI_CH_CFG_REG, cfg); +} + +static void sun6i_csi_set_window(struct sun6i_csi_dev *sdev) +{ + struct sun6i_csi_config *config = &sdev->csi.config; + u32 bytesperline_y; + u32 bytesperline_c; + int *planar_offset = sdev->planar_offset; + u32 width = config->width; + u32 height = config->height; + u32 hor_len = width; + + switch (config->pixelformat) { + case V4L2_PIX_FMT_YUYV: + case V4L2_PIX_FMT_YVYU: + case V4L2_PIX_FMT_UYVY: + case V4L2_PIX_FMT_VYUY: + dev_dbg(sdev->dev, + "Horizontal length should be 2 times of width for packed YUV formats!\n"); + hor_len = width * 2; + break; + default: + break; + } + + regmap_write(sdev->regmap, CSI_CH_HSIZE_REG, + CSI_CH_HSIZE_HOR_LEN(hor_len) | + CSI_CH_HSIZE_HOR_START(0)); + regmap_write(sdev->regmap, CSI_CH_VSIZE_REG, + CSI_CH_VSIZE_VER_LEN(height) | + CSI_CH_VSIZE_VER_START(0)); + + planar_offset[0] = 0; + switch (config->pixelformat) { + case V4L2_PIX_FMT_HM12: + case V4L2_PIX_FMT_NV12: + case V4L2_PIX_FMT_NV21: + case V4L2_PIX_FMT_NV16: + case V4L2_PIX_FMT_NV61: + bytesperline_y = width; + bytesperline_c = width; + planar_offset[1] = bytesperline_y * height; + planar_offset[2] = -1; + break; + case V4L2_PIX_FMT_YUV420: + case V4L2_PIX_FMT_YVU420: + bytesperline_y = width; + bytesperline_c = width / 2; + planar_offset[1] = bytesperline_y * height; + planar_offset[2] = planar_offset[1] + + bytesperline_c * height / 2; + break; + case V4L2_PIX_FMT_YUV422P: + bytesperline_y = width; + bytesperline_c = width / 2; + planar_offset[1] = bytesperline_y * height; + planar_offset[2] = planar_offset[1] + + bytesperline_c * height; + break; + default: /* raw */ + dev_dbg(sdev->dev, + "Calculating pixelformat(0x%x)'s bytesperline as a packed format\n", + config->pixelformat); + bytesperline_y = (sun6i_csi_get_bpp(config->pixelformat) * + config->width) / 8; + bytesperline_c = 0; + planar_offset[1] = -1; + planar_offset[2] = -1; + break; + } + + regmap_write(sdev->regmap, CSI_CH_BUF_LEN_REG, + CSI_CH_BUF_LEN_BUF_LEN_C(bytesperline_c) | + CSI_CH_BUF_LEN_BUF_LEN_Y(bytesperline_y)); +} + +int sun6i_csi_update_config(struct sun6i_csi *csi, + struct sun6i_csi_config *config) +{ + struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi); + + if (config == NULL) + return -EINVAL; + + memcpy(&csi->config, config, sizeof(csi->config)); + + sun6i_csi_setup_bus(sdev); + sun6i_csi_set_format(sdev); + sun6i_csi_set_window(sdev); + + return 0; +} + +void sun6i_csi_update_buf_addr(struct sun6i_csi *csi, dma_addr_t addr) +{ + struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi); + + regmap_write(sdev->regmap, CSI_CH_F0_BUFA_REG, + (addr + sdev->planar_offset[0]) >> 2); + if (sdev->planar_offset[1] != -1) + regmap_write(sdev->regmap, CSI_CH_F1_BUFA_REG, + (addr + sdev->planar_offset[1]) >> 2); + if (sdev->planar_offset[2] != -1) + regmap_write(sdev->regmap, CSI_CH_F2_BUFA_REG, + (addr + sdev->planar_offset[2]) >> 2); +} + +void sun6i_csi_set_stream(struct sun6i_csi *csi, bool enable) +{ + struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi); + struct regmap *regmap = sdev->regmap; + + if (!enable) { + regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON, 0); + regmap_write(regmap, CSI_CH_INT_EN_REG, 0); + return; + } + + regmap_write(regmap, CSI_CH_INT_STA_REG, 0xFF); + regmap_write(regmap, CSI_CH_INT_EN_REG, + CSI_CH_INT_EN_HB_OF_INT_EN | + CSI_CH_INT_EN_FIFO2_OF_INT_EN | + CSI_CH_INT_EN_FIFO1_OF_INT_EN | + CSI_CH_INT_EN_FIFO0_OF_INT_EN | + CSI_CH_INT_EN_FD_INT_EN | + CSI_CH_INT_EN_CD_INT_EN); + + regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON, + CSI_CAP_CH0_VCAP_ON); +} + +/* ----------------------------------------------------------------------------- + * Media Controller and V4L2 + */ +static int sun6i_csi_link_entity(struct sun6i_csi *csi, + struct media_entity *entity, + struct fwnode_handle *fwnode) +{ + struct media_entity *sink; + struct media_pad *sink_pad; + int src_pad_index; + int ret; + + ret = media_entity_get_fwnode_pad(entity, fwnode, MEDIA_PAD_FL_SOURCE); + if (ret < 0) { + dev_err(csi->dev, "%s: no source pad in external entity %s\n", + __func__, entity->name); + return -EINVAL; + } + + src_pad_index = ret; + + sink = &csi->video.vdev.entity; + sink_pad = &csi->video.pad; + + dev_dbg(csi->dev, "creating %s:%u -> %s:%u link\n", + entity->name, src_pad_index, sink->name, sink_pad->index); + ret = media_create_pad_link(entity, src_pad_index, sink, + sink_pad->index, + MEDIA_LNK_FL_ENABLED | + MEDIA_LNK_FL_IMMUTABLE); + if (ret < 0) { + dev_err(csi->dev, "failed to create %s:%u -> %s:%u link\n", + entity->name, src_pad_index, + sink->name, sink_pad->index); + return ret; + } + + return 0; +} + +static int sun6i_subdev_notify_complete(struct v4l2_async_notifier *notifier) +{ + struct sun6i_csi *csi = container_of(notifier, struct sun6i_csi, + notifier); + struct v4l2_device *v4l2_dev = &csi->v4l2_dev; + struct v4l2_subdev *sd; + int ret; + + dev_dbg(csi->dev, "notify complete, all subdevs registered\n"); + + sd = list_first_entry(&v4l2_dev->subdevs, struct v4l2_subdev, list); + if (sd == NULL) + return -EINVAL; + + ret = sun6i_csi_link_entity(csi, &sd->entity, sd->fwnode); + if (ret < 0) + return ret; + + ret = v4l2_device_register_subdev_nodes(&csi->v4l2_dev); + if (ret < 0) + return ret; + + return media_device_register(&csi->media_dev); +} + +static const struct v4l2_async_notifier_operations sun6i_csi_async_ops = { + .complete = sun6i_subdev_notify_complete, +}; + +static int sun6i_csi_fwnode_parse(struct device *dev, + struct v4l2_fwnode_endpoint *vep, + struct v4l2_async_subdev *asd) +{ + struct sun6i_csi *csi = dev_get_drvdata(dev); + + if (vep->base.port || vep->base.id) { + dev_warn(dev, "Only support a single port with one endpoint\n"); + return -ENOTCONN; + } + + switch (vep->bus_type) { + case V4L2_MBUS_PARALLEL: + case V4L2_MBUS_BT656: + csi->v4l2_ep = *vep; + return 0; + default: + dev_err(dev, "Unsupported media bus type\n"); + return -ENOTCONN; + } +} + +static void sun6i_csi_v4l2_cleanup(struct sun6i_csi *csi) +{ + media_device_unregister(&csi->media_dev); + v4l2_async_notifier_unregister(&csi->notifier); + v4l2_async_notifier_cleanup(&csi->notifier); + sun6i_video_cleanup(&csi->video); + v4l2_device_unregister(&csi->v4l2_dev); + v4l2_ctrl_handler_free(&csi->ctrl_handler); + media_device_cleanup(&csi->media_dev); +} + +static int sun6i_csi_v4l2_init(struct sun6i_csi *csi) +{ + int ret; + + csi->media_dev.dev = csi->dev; + strscpy(csi->media_dev.model, "Allwinner Video Capture Device", + sizeof(csi->media_dev.model)); + csi->media_dev.hw_revision = 0; + + media_device_init(&csi->media_dev); + v4l2_async_notifier_init(&csi->notifier); + + ret = v4l2_ctrl_handler_init(&csi->ctrl_handler, 0); + if (ret) { + dev_err(csi->dev, "V4L2 controls handler init failed (%d)\n", + ret); + goto clean_media; + } + + csi->v4l2_dev.mdev = &csi->media_dev; + csi->v4l2_dev.ctrl_handler = &csi->ctrl_handler; + ret = v4l2_device_register(csi->dev, &csi->v4l2_dev); + if (ret) { + dev_err(csi->dev, "V4L2 device registration failed (%d)\n", + ret); + goto free_ctrl; + } + + ret = sun6i_video_init(&csi->video, csi, "sun6i-csi"); + if (ret) + goto unreg_v4l2; + + ret = v4l2_async_notifier_parse_fwnode_endpoints( + csi->dev, &csi->notifier, sizeof(struct v4l2_async_subdev), + sun6i_csi_fwnode_parse); + if (ret) + goto clean_video; + + csi->notifier.ops = &sun6i_csi_async_ops; + + ret = v4l2_async_notifier_register(&csi->v4l2_dev, &csi->notifier); + if (ret) { + dev_err(csi->dev, "notifier registration failed\n"); + goto clean_video; + } + + return 0; + +clean_video: + sun6i_video_cleanup(&csi->video); +unreg_v4l2: + v4l2_device_unregister(&csi->v4l2_dev); +free_ctrl: + v4l2_ctrl_handler_free(&csi->ctrl_handler); +clean_media: + v4l2_async_notifier_cleanup(&csi->notifier); + media_device_cleanup(&csi->media_dev); + + return ret; +} + +/* ----------------------------------------------------------------------------- + * Resources and IRQ + */ +static irqreturn_t sun6i_csi_isr(int irq, void *dev_id) +{ + struct sun6i_csi_dev *sdev = (struct sun6i_csi_dev *)dev_id; + struct regmap *regmap = sdev->regmap; + u32 status; + + regmap_read(regmap, CSI_CH_INT_STA_REG, &status); + + if (!(status & 0xFF)) + return IRQ_NONE; + + if ((status & CSI_CH_INT_STA_FIFO0_OF_PD) || + (status & CSI_CH_INT_STA_FIFO1_OF_PD) || + (status & CSI_CH_INT_STA_FIFO2_OF_PD) || + (status & CSI_CH_INT_STA_HB_OF_PD)) { + regmap_write(regmap, CSI_CH_INT_STA_REG, status); + regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0); + regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, + CSI_EN_CSI_EN); + return IRQ_HANDLED; + } + + if (status & CSI_CH_INT_STA_FD_PD) + sun6i_video_frame_done(&sdev->csi.video); + + regmap_write(regmap, CSI_CH_INT_STA_REG, status); + + return IRQ_HANDLED; +} + +static const struct regmap_config sun6i_csi_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = 0x1000, +}; + +static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev, + struct platform_device *pdev) +{ + struct resource *res; + void __iomem *io_base; + int ret; + int irq; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + io_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(io_base)) + return PTR_ERR(io_base); + + sdev->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "bus", io_base, + &sun6i_csi_regmap_config); + if (IS_ERR(sdev->regmap)) { + dev_err(&pdev->dev, "Failed to init register map\n"); + return PTR_ERR(sdev->regmap); + } + + sdev->clk_mod = devm_clk_get(&pdev->dev, "mod"); + if (IS_ERR(sdev->clk_mod)) { + dev_err(&pdev->dev, "Unable to acquire csi clock\n"); + return PTR_ERR(sdev->clk_mod); + } + + sdev->clk_ram = devm_clk_get(&pdev->dev, "ram"); + if (IS_ERR(sdev->clk_ram)) { + dev_err(&pdev->dev, "Unable to acquire dram-csi clock\n"); + return PTR_ERR(sdev->clk_ram); + } + + sdev->rstc_bus = devm_reset_control_get_shared(&pdev->dev, NULL); + if (IS_ERR(sdev->rstc_bus)) { + dev_err(&pdev->dev, "Cannot get reset controller\n"); + return PTR_ERR(sdev->rstc_bus); + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "No csi IRQ specified\n"); + ret = -ENXIO; + return ret; + } + + ret = devm_request_irq(&pdev->dev, irq, sun6i_csi_isr, 0, MODULE_NAME, + sdev); + if (ret) { + dev_err(&pdev->dev, "Cannot request csi IRQ\n"); + return ret; + } + + return 0; +} + +/* + * PHYS_OFFSET isn't available on all architectures. In order to + * accomodate for COMPILE_TEST, let's define it to something dumb. + */ +#if defined(CONFIG_COMPILE_TEST) && !defined(PHYS_OFFSET) +#define PHYS_OFFSET 0 +#endif + +static int sun6i_csi_probe(struct platform_device *pdev) +{ + struct sun6i_csi_dev *sdev; + int ret; + + sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL); + if (!sdev) + return -ENOMEM; + + sdev->dev = &pdev->dev; + /* The DMA bus has the memory mapped at 0 */ + sdev->dev->dma_pfn_offset = PHYS_OFFSET >> PAGE_SHIFT; + + ret = sun6i_csi_resource_request(sdev, pdev); + if (ret) + return ret; + + platform_set_drvdata(pdev, sdev); + + sdev->csi.dev = &pdev->dev; + return sun6i_csi_v4l2_init(&sdev->csi); +} + +static int sun6i_csi_remove(struct platform_device *pdev) +{ + struct sun6i_csi_dev *sdev = platform_get_drvdata(pdev); + + sun6i_csi_v4l2_cleanup(&sdev->csi); + + return 0; +} + +static const struct of_device_id sun6i_csi_of_match[] = { + { .compatible = "allwinner,sun8i-v3s-csi", }, + {}, +}; +MODULE_DEVICE_TABLE(of, sun6i_csi_of_match); + +static struct platform_driver sun6i_csi_platform_driver = { + .probe = sun6i_csi_probe, + .remove = sun6i_csi_remove, + .driver = { + .name = MODULE_NAME, + .of_match_table = of_match_ptr(sun6i_csi_of_match), + }, +}; +module_platform_driver(sun6i_csi_platform_driver); + +MODULE_DESCRIPTION("Allwinner V3s Camera Sensor Interface driver"); +MODULE_AUTHOR("Yong Deng <yong.deng@magewell.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h new file mode 100644 index 000000000000..bd9be36aabfe --- /dev/null +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.h @@ -0,0 +1,135 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing) + * All rights reserved. + * Author: Yong Deng <yong.deng@magewell.com> + */ + +#ifndef __SUN6I_CSI_H__ +#define __SUN6I_CSI_H__ + +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-fwnode.h> + +#include "sun6i_video.h" + +struct sun6i_csi; + +/** + * struct sun6i_csi_config - configs for sun6i csi + * @pixelformat: v4l2 pixel format (V4L2_PIX_FMT_*) + * @code: media bus format code (MEDIA_BUS_FMT_*) + * @field: used interlacing type (enum v4l2_field) + * @width: frame width + * @height: frame height + */ +struct sun6i_csi_config { + u32 pixelformat; + u32 code; + u32 field; + u32 width; + u32 height; +}; + +struct sun6i_csi { + struct device *dev; + struct v4l2_ctrl_handler ctrl_handler; + struct v4l2_device v4l2_dev; + struct media_device media_dev; + + struct v4l2_async_notifier notifier; + + /* video port settings */ + struct v4l2_fwnode_endpoint v4l2_ep; + + struct sun6i_csi_config config; + + struct sun6i_video video; +}; + +/** + * sun6i_csi_is_format_supported() - check if the format supported by csi + * @csi: pointer to the csi + * @pixformat: v4l2 pixel format (V4L2_PIX_FMT_*) + * @mbus_code: media bus format code (MEDIA_BUS_FMT_*) + */ +bool sun6i_csi_is_format_supported(struct sun6i_csi *csi, u32 pixformat, + u32 mbus_code); + +/** + * sun6i_csi_set_power() - power on/off the csi + * @csi: pointer to the csi + * @enable: on/off + */ +int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable); + +/** + * sun6i_csi_update_config() - update the csi register setttings + * @csi: pointer to the csi + * @config: see struct sun6i_csi_config + */ +int sun6i_csi_update_config(struct sun6i_csi *csi, + struct sun6i_csi_config *config); + +/** + * sun6i_csi_update_buf_addr() - update the csi frame buffer address + * @csi: pointer to the csi + * @addr: frame buffer's physical address + */ +void sun6i_csi_update_buf_addr(struct sun6i_csi *csi, dma_addr_t addr); + +/** + * sun6i_csi_set_stream() - start/stop csi streaming + * @csi: pointer to the csi + * @enable: start/stop + */ +void sun6i_csi_set_stream(struct sun6i_csi *csi, bool enable); + +/* get bpp form v4l2 pixformat */ +static inline int sun6i_csi_get_bpp(unsigned int pixformat) +{ + switch (pixformat) { + case V4L2_PIX_FMT_SBGGR8: + case V4L2_PIX_FMT_SGBRG8: + case V4L2_PIX_FMT_SGRBG8: + case V4L2_PIX_FMT_SRGGB8: + return 8; + case V4L2_PIX_FMT_SBGGR10: + case V4L2_PIX_FMT_SGBRG10: + case V4L2_PIX_FMT_SGRBG10: + case V4L2_PIX_FMT_SRGGB10: + return 10; + case V4L2_PIX_FMT_SBGGR12: + case V4L2_PIX_FMT_SGBRG12: + case V4L2_PIX_FMT_SGRBG12: + case V4L2_PIX_FMT_SRGGB12: + case V4L2_PIX_FMT_HM12: + case V4L2_PIX_FMT_NV12: + case V4L2_PIX_FMT_NV21: + case V4L2_PIX_FMT_YUV420: + case V4L2_PIX_FMT_YVU420: + return 12; + case V4L2_PIX_FMT_YUYV: + case V4L2_PIX_FMT_YVYU: + case V4L2_PIX_FMT_UYVY: + case V4L2_PIX_FMT_VYUY: + case V4L2_PIX_FMT_NV16: + case V4L2_PIX_FMT_NV61: + case V4L2_PIX_FMT_YUV422P: + return 16; + case V4L2_PIX_FMT_RGB24: + case V4L2_PIX_FMT_BGR24: + return 24; + case V4L2_PIX_FMT_RGB32: + case V4L2_PIX_FMT_BGR32: + return 32; + default: + WARN(1, "Unsupported pixformat: 0x%x\n", pixformat); + break; + } + + return 0; +} + +#endif /* __SUN6I_CSI_H__ */ diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_reg.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_reg.h new file mode 100644 index 000000000000..3a55836a5a4d --- /dev/null +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_reg.h @@ -0,0 +1,196 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing) + * All rights reserved. + * Author: Yong Deng <yong.deng@magewell.com> + */ + +#ifndef __SUN6I_CSI_REG_H__ +#define __SUN6I_CSI_REG_H__ + +#include <linux/kernel.h> + +#define CSI_EN_REG 0x0 +#define CSI_EN_VER_EN BIT(30) +#define CSI_EN_CSI_EN BIT(0) + +#define CSI_IF_CFG_REG 0x4 +#define CSI_IF_CFG_SRC_TYPE_MASK BIT(21) +#define CSI_IF_CFG_SRC_TYPE_PROGRESSED ((0 << 21) & CSI_IF_CFG_SRC_TYPE_MASK) +#define CSI_IF_CFG_SRC_TYPE_INTERLACED ((1 << 21) & CSI_IF_CFG_SRC_TYPE_MASK) +#define CSI_IF_CFG_FPS_DS_EN BIT(20) +#define CSI_IF_CFG_FIELD_MASK BIT(19) +#define CSI_IF_CFG_FIELD_NEGATIVE ((0 << 19) & CSI_IF_CFG_FIELD_MASK) +#define CSI_IF_CFG_FIELD_POSITIVE ((1 << 19) & CSI_IF_CFG_FIELD_MASK) +#define CSI_IF_CFG_VREF_POL_MASK BIT(18) +#define CSI_IF_CFG_VREF_POL_NEGATIVE ((0 << 18) & CSI_IF_CFG_VREF_POL_MASK) +#define CSI_IF_CFG_VREF_POL_POSITIVE ((1 << 18) & CSI_IF_CFG_VREF_POL_MASK) +#define CSI_IF_CFG_HREF_POL_MASK BIT(17) +#define CSI_IF_CFG_HREF_POL_NEGATIVE ((0 << 17) & CSI_IF_CFG_HREF_POL_MASK) +#define CSI_IF_CFG_HREF_POL_POSITIVE ((1 << 17) & CSI_IF_CFG_HREF_POL_MASK) +#define CSI_IF_CFG_CLK_POL_MASK BIT(16) +#define CSI_IF_CFG_CLK_POL_RISING_EDGE ((0 << 16) & CSI_IF_CFG_CLK_POL_MASK) +#define CSI_IF_CFG_CLK_POL_FALLING_EDGE ((1 << 16) & CSI_IF_CFG_CLK_POL_MASK) +#define CSI_IF_CFG_IF_DATA_WIDTH_MASK GENMASK(10, 8) +#define CSI_IF_CFG_IF_DATA_WIDTH_8BIT ((0 << 8) & CSI_IF_CFG_IF_DATA_WIDTH_MASK) +#define CSI_IF_CFG_IF_DATA_WIDTH_10BIT ((1 << 8) & CSI_IF_CFG_IF_DATA_WIDTH_MASK) +#define CSI_IF_CFG_IF_DATA_WIDTH_12BIT ((2 << 8) & CSI_IF_CFG_IF_DATA_WIDTH_MASK) +#define CSI_IF_CFG_MIPI_IF_MASK BIT(7) +#define CSI_IF_CFG_MIPI_IF_CSI (0 << 7) +#define CSI_IF_CFG_MIPI_IF_MIPI (1 << 7) +#define CSI_IF_CFG_CSI_IF_MASK GENMASK(4, 0) +#define CSI_IF_CFG_CSI_IF_YUV422_INTLV ((0 << 0) & CSI_IF_CFG_CSI_IF_MASK) +#define CSI_IF_CFG_CSI_IF_YUV422_16BIT ((1 << 0) & CSI_IF_CFG_CSI_IF_MASK) +#define CSI_IF_CFG_CSI_IF_BT656 ((4 << 0) & CSI_IF_CFG_CSI_IF_MASK) +#define CSI_IF_CFG_CSI_IF_BT1120 ((5 << 0) & CSI_IF_CFG_CSI_IF_MASK) + +#define CSI_CAP_REG 0x8 +#define CSI_CAP_CH0_CAP_MASK_MASK GENMASK(5, 2) +#define CSI_CAP_CH0_CAP_MASK(count) ((count << 2) & CSI_CAP_CH0_CAP_MASK_MASK) +#define CSI_CAP_CH0_VCAP_ON BIT(1) +#define CSI_CAP_CH0_SCAP_ON BIT(0) + +#define CSI_SYNC_CNT_REG 0xc +#define CSI_FIFO_THRS_REG 0x10 +#define CSI_BT656_HEAD_CFG_REG 0x14 +#define CSI_PTN_LEN_REG 0x30 +#define CSI_PTN_ADDR_REG 0x34 +#define CSI_VER_REG 0x3c + +#define CSI_CH_CFG_REG 0x44 +#define CSI_CH_CFG_INPUT_FMT_MASK GENMASK(23, 20) +#define CSI_CH_CFG_INPUT_FMT(fmt) ((fmt << 20) & CSI_CH_CFG_INPUT_FMT_MASK) +#define CSI_CH_CFG_OUTPUT_FMT_MASK GENMASK(19, 16) +#define CSI_CH_CFG_OUTPUT_FMT(fmt) ((fmt << 16) & CSI_CH_CFG_OUTPUT_FMT_MASK) +#define CSI_CH_CFG_VFLIP_EN BIT(13) +#define CSI_CH_CFG_HFLIP_EN BIT(12) +#define CSI_CH_CFG_FIELD_SEL_MASK GENMASK(11, 10) +#define CSI_CH_CFG_FIELD_SEL_FIELD0 ((0 << 10) & CSI_CH_CFG_FIELD_SEL_MASK) +#define CSI_CH_CFG_FIELD_SEL_FIELD1 ((1 << 10) & CSI_CH_CFG_FIELD_SEL_MASK) +#define CSI_CH_CFG_FIELD_SEL_BOTH ((2 << 10) & CSI_CH_CFG_FIELD_SEL_MASK) +#define CSI_CH_CFG_INPUT_SEQ_MASK GENMASK(9, 8) +#define CSI_CH_CFG_INPUT_SEQ(seq) ((seq << 8) & CSI_CH_CFG_INPUT_SEQ_MASK) + +#define CSI_CH_SCALE_REG 0x4c +#define CSI_CH_SCALE_QUART_EN BIT(0) + +#define CSI_CH_F0_BUFA_REG 0x50 + +#define CSI_CH_F1_BUFA_REG 0x58 + +#define CSI_CH_F2_BUFA_REG 0x60 + +#define CSI_CH_STA_REG 0x6c +#define CSI_CH_STA_FIELD_STA_MASK BIT(2) +#define CSI_CH_STA_FIELD_STA_FIELD0 ((0 << 2) & CSI_CH_STA_FIELD_STA_MASK) +#define CSI_CH_STA_FIELD_STA_FIELD1 ((1 << 2) & CSI_CH_STA_FIELD_STA_MASK) +#define CSI_CH_STA_VCAP_STA BIT(1) +#define CSI_CH_STA_SCAP_STA BIT(0) + +#define CSI_CH_INT_EN_REG 0x70 +#define CSI_CH_INT_EN_VS_INT_EN BIT(7) +#define CSI_CH_INT_EN_HB_OF_INT_EN BIT(6) +#define CSI_CH_INT_EN_MUL_ERR_INT_EN BIT(5) +#define CSI_CH_INT_EN_FIFO2_OF_INT_EN BIT(4) +#define CSI_CH_INT_EN_FIFO1_OF_INT_EN BIT(3) +#define CSI_CH_INT_EN_FIFO0_OF_INT_EN BIT(2) +#define CSI_CH_INT_EN_FD_INT_EN BIT(1) +#define CSI_CH_INT_EN_CD_INT_EN BIT(0) + +#define CSI_CH_INT_STA_REG 0x74 +#define CSI_CH_INT_STA_VS_PD BIT(7) +#define CSI_CH_INT_STA_HB_OF_PD BIT(6) +#define CSI_CH_INT_STA_MUL_ERR_PD BIT(5) +#define CSI_CH_INT_STA_FIFO2_OF_PD BIT(4) +#define CSI_CH_INT_STA_FIFO1_OF_PD BIT(3) +#define CSI_CH_INT_STA_FIFO0_OF_PD BIT(2) +#define CSI_CH_INT_STA_FD_PD BIT(1) +#define CSI_CH_INT_STA_CD_PD BIT(0) + +#define CSI_CH_FLD1_VSIZE_REG 0x78 + +#define CSI_CH_HSIZE_REG 0x80 +#define CSI_CH_HSIZE_HOR_LEN_MASK GENMASK(28, 16) +#define CSI_CH_HSIZE_HOR_LEN(len) ((len << 16) & CSI_CH_HSIZE_HOR_LEN_MASK) +#define CSI_CH_HSIZE_HOR_START_MASK GENMASK(12, 0) +#define CSI_CH_HSIZE_HOR_START(start) ((start << 0) & CSI_CH_HSIZE_HOR_START_MASK) + +#define CSI_CH_VSIZE_REG 0x84 +#define CSI_CH_VSIZE_VER_LEN_MASK GENMASK(28, 16) +#define CSI_CH_VSIZE_VER_LEN(len) ((len << 16) & CSI_CH_VSIZE_VER_LEN_MASK) +#define CSI_CH_VSIZE_VER_START_MASK GENMASK(12, 0) +#define CSI_CH_VSIZE_VER_START(start) ((start << 0) & CSI_CH_VSIZE_VER_START_MASK) + +#define CSI_CH_BUF_LEN_REG 0x88 +#define CSI_CH_BUF_LEN_BUF_LEN_C_MASK GENMASK(29, 16) +#define CSI_CH_BUF_LEN_BUF_LEN_C(len) ((len << 16) & CSI_CH_BUF_LEN_BUF_LEN_C_MASK) +#define CSI_CH_BUF_LEN_BUF_LEN_Y_MASK GENMASK(13, 0) +#define CSI_CH_BUF_LEN_BUF_LEN_Y(len) ((len << 0) & CSI_CH_BUF_LEN_BUF_LEN_Y_MASK) + +#define CSI_CH_FLIP_SIZE_REG 0x8c +#define CSI_CH_FLIP_SIZE_VER_LEN_MASK GENMASK(28, 16) +#define CSI_CH_FLIP_SIZE_VER_LEN(len) ((len << 16) & CSI_CH_FLIP_SIZE_VER_LEN_MASK) +#define CSI_CH_FLIP_SIZE_VALID_LEN_MASK GENMASK(12, 0) +#define CSI_CH_FLIP_SIZE_VALID_LEN(len) ((len << 0) & CSI_CH_FLIP_SIZE_VALID_LEN_MASK) + +#define CSI_CH_FRM_CLK_CNT_REG 0x90 +#define CSI_CH_ACC_ITNL_CLK_CNT_REG 0x94 +#define CSI_CH_FIFO_STAT_REG 0x98 +#define CSI_CH_PCLK_STAT_REG 0x9c + +/* + * csi input data format + */ +enum csi_input_fmt { + CSI_INPUT_FORMAT_RAW = 0, + CSI_INPUT_FORMAT_YUV422 = 3, + CSI_INPUT_FORMAT_YUV420 = 4, +}; + +/* + * csi output data format + */ +enum csi_output_fmt { + /* only when input format is RAW */ + CSI_FIELD_RAW_8 = 0, + CSI_FIELD_RAW_10 = 1, + CSI_FIELD_RAW_12 = 2, + CSI_FIELD_RGB565 = 4, + CSI_FIELD_RGB888 = 5, + CSI_FIELD_PRGB888 = 6, + CSI_FRAME_RAW_8 = 8, + CSI_FRAME_RAW_10 = 9, + CSI_FRAME_RAW_12 = 10, + CSI_FRAME_RGB565 = 12, + CSI_FRAME_RGB888 = 13, + CSI_FRAME_PRGB888 = 14, + + /* only when input format is YUV422 */ + CSI_FIELD_PLANAR_YUV422 = 0, + CSI_FIELD_PLANAR_YUV420 = 1, + CSI_FRAME_PLANAR_YUV420 = 2, + CSI_FRAME_PLANAR_YUV422 = 3, + CSI_FIELD_UV_CB_YUV422 = 4, + CSI_FIELD_UV_CB_YUV420 = 5, + CSI_FRAME_UV_CB_YUV420 = 6, + CSI_FRAME_UV_CB_YUV422 = 7, + CSI_FIELD_MB_YUV422 = 8, + CSI_FIELD_MB_YUV420 = 9, + CSI_FRAME_MB_YUV420 = 10, + CSI_FRAME_MB_YUV422 = 11, + CSI_FIELD_UV_CB_YUV422_10 = 12, + CSI_FIELD_UV_CB_YUV420_10 = 13, +}; + +/* + * csi YUV input data sequence + */ +enum csi_input_seq { + /* only when input format is YUV422 */ + CSI_INPUT_SEQ_YUYV = 0, + CSI_INPUT_SEQ_YVYU, + CSI_INPUT_SEQ_UYVY, + CSI_INPUT_SEQ_VYUY, +}; + +#endif /* __SUN6I_CSI_REG_H__ */ diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c new file mode 100644 index 000000000000..e1901a38726f --- /dev/null +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c @@ -0,0 +1,678 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing) + * All rights reserved. + * Author: Yong Deng <yong.deng@magewell.com> + */ + +#include <linux/of.h> + +#include <media/v4l2-device.h> +#include <media/v4l2-event.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-mc.h> +#include <media/videobuf2-dma-contig.h> +#include <media/videobuf2-v4l2.h> + +#include "sun6i_csi.h" +#include "sun6i_video.h" + +/* This is got from BSP sources. */ +#define MIN_WIDTH (32) +#define MIN_HEIGHT (32) +#define MAX_WIDTH (4800) +#define MAX_HEIGHT (4800) + +struct sun6i_csi_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; + + dma_addr_t dma_addr; + bool queued_to_csi; +}; + +static const u32 supported_pixformats[] = { + V4L2_PIX_FMT_SBGGR8, + V4L2_PIX_FMT_SGBRG8, + V4L2_PIX_FMT_SGRBG8, + V4L2_PIX_FMT_SRGGB8, + V4L2_PIX_FMT_SBGGR10, + V4L2_PIX_FMT_SGBRG10, + V4L2_PIX_FMT_SGRBG10, + V4L2_PIX_FMT_SRGGB10, + V4L2_PIX_FMT_SBGGR12, + V4L2_PIX_FMT_SGBRG12, + V4L2_PIX_FMT_SGRBG12, + V4L2_PIX_FMT_SRGGB12, + V4L2_PIX_FMT_YUYV, + V4L2_PIX_FMT_YVYU, + V4L2_PIX_FMT_UYVY, + V4L2_PIX_FMT_VYUY, + V4L2_PIX_FMT_HM12, + V4L2_PIX_FMT_NV12, + V4L2_PIX_FMT_NV21, + V4L2_PIX_FMT_YUV420, + V4L2_PIX_FMT_YVU420, + V4L2_PIX_FMT_NV16, + V4L2_PIX_FMT_NV61, + V4L2_PIX_FMT_YUV422P, +}; + +static bool is_pixformat_valid(unsigned int pixformat) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(supported_pixformats); i++) + if (supported_pixformats[i] == pixformat) + return true; + + return false; +} + +static struct v4l2_subdev * +sun6i_video_remote_subdev(struct sun6i_video *video, u32 *pad) +{ + struct media_pad *remote; + + remote = media_entity_remote_pad(&video->pad); + + if (!remote || !is_media_entity_v4l2_subdev(remote->entity)) + return NULL; + + if (pad) + *pad = remote->index; + + return media_entity_to_v4l2_subdev(remote->entity); +} + +static int sun6i_video_queue_setup(struct vb2_queue *vq, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct sun6i_video *video = vb2_get_drv_priv(vq); + unsigned int size = video->fmt.fmt.pix.sizeimage; + + if (*nplanes) + return sizes[0] < size ? -EINVAL : 0; + + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int sun6i_video_buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct sun6i_csi_buffer *buf = + container_of(vbuf, struct sun6i_csi_buffer, vb); + struct sun6i_video *video = vb2_get_drv_priv(vb->vb2_queue); + unsigned long size = video->fmt.fmt.pix.sizeimage; + + if (vb2_plane_size(vb, 0) < size) { + v4l2_err(video->vdev.v4l2_dev, "buffer too small (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + + buf->dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0); + + vbuf->field = video->fmt.fmt.pix.field; + + return 0; +} + +static int sun6i_video_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct sun6i_video *video = vb2_get_drv_priv(vq); + struct sun6i_csi_buffer *buf; + struct sun6i_csi_buffer *next_buf; + struct sun6i_csi_config config; + struct v4l2_subdev *subdev; + unsigned long flags; + int ret; + + video->sequence = 0; + + ret = media_pipeline_start(&video->vdev.entity, &video->vdev.pipe); + if (ret < 0) + goto clear_dma_queue; + + if (video->mbus_code == 0) { + ret = -EINVAL; + goto stop_media_pipeline; + } + + subdev = sun6i_video_remote_subdev(video, NULL); + if (!subdev) + goto stop_media_pipeline; + + config.pixelformat = video->fmt.fmt.pix.pixelformat; + config.code = video->mbus_code; + config.field = video->fmt.fmt.pix.field; + config.width = video->fmt.fmt.pix.width; + config.height = video->fmt.fmt.pix.height; + + ret = sun6i_csi_update_config(video->csi, &config); + if (ret < 0) + goto stop_media_pipeline; + + spin_lock_irqsave(&video->dma_queue_lock, flags); + + buf = list_first_entry(&video->dma_queue, + struct sun6i_csi_buffer, list); + buf->queued_to_csi = true; + sun6i_csi_update_buf_addr(video->csi, buf->dma_addr); + + sun6i_csi_set_stream(video->csi, true); + + /* + * CSI will lookup the next dma buffer for next frame before the + * the current frame done IRQ triggered. This is not documented + * but reported by Ondřej Jirman. + * The BSP code has workaround for this too. It skip to mark the + * first buffer as frame done for VB2 and pass the second buffer + * to CSI in the first frame done ISR call. Then in second frame + * done ISR call, it mark the first buffer as frame done for VB2 + * and pass the third buffer to CSI. And so on. The bad thing is + * that the first buffer will be written twice and the first frame + * is dropped even the queued buffer is sufficient. + * So, I make some improvement here. Pass the next buffer to CSI + * just follow starting the CSI. In this case, the first frame + * will be stored in first buffer, second frame in second buffer. + * This method is used to avoid dropping the first frame, it + * would also drop frame when lacking of queued buffer. + */ + next_buf = list_next_entry(buf, list); + next_buf->queued_to_csi = true; + sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr); + + spin_unlock_irqrestore(&video->dma_queue_lock, flags); + + ret = v4l2_subdev_call(subdev, video, s_stream, 1); + if (ret && ret != -ENOIOCTLCMD) + goto stop_csi_stream; + + return 0; + +stop_csi_stream: + sun6i_csi_set_stream(video->csi, false); +stop_media_pipeline: + media_pipeline_stop(&video->vdev.entity); +clear_dma_queue: + spin_lock_irqsave(&video->dma_queue_lock, flags); + list_for_each_entry(buf, &video->dma_queue, list) + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + INIT_LIST_HEAD(&video->dma_queue); + spin_unlock_irqrestore(&video->dma_queue_lock, flags); + + return ret; +} + +static void sun6i_video_stop_streaming(struct vb2_queue *vq) +{ + struct sun6i_video *video = vb2_get_drv_priv(vq); + struct v4l2_subdev *subdev; + unsigned long flags; + struct sun6i_csi_buffer *buf; + + subdev = sun6i_video_remote_subdev(video, NULL); + if (subdev) + v4l2_subdev_call(subdev, video, s_stream, 0); + + sun6i_csi_set_stream(video->csi, false); + + media_pipeline_stop(&video->vdev.entity); + + /* Release all active buffers */ + spin_lock_irqsave(&video->dma_queue_lock, flags); + list_for_each_entry(buf, &video->dma_queue, list) + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + INIT_LIST_HEAD(&video->dma_queue); + spin_unlock_irqrestore(&video->dma_queue_lock, flags); +} + +static void sun6i_video_buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct sun6i_csi_buffer *buf = + container_of(vbuf, struct sun6i_csi_buffer, vb); + struct sun6i_video *video = vb2_get_drv_priv(vb->vb2_queue); + unsigned long flags; + + spin_lock_irqsave(&video->dma_queue_lock, flags); + buf->queued_to_csi = false; + list_add_tail(&buf->list, &video->dma_queue); + spin_unlock_irqrestore(&video->dma_queue_lock, flags); +} + +void sun6i_video_frame_done(struct sun6i_video *video) +{ + struct sun6i_csi_buffer *buf; + struct sun6i_csi_buffer *next_buf; + struct vb2_v4l2_buffer *vbuf; + + spin_lock(&video->dma_queue_lock); + + buf = list_first_entry(&video->dma_queue, + struct sun6i_csi_buffer, list); + if (list_is_last(&buf->list, &video->dma_queue)) { + dev_dbg(video->csi->dev, "Frame droped!\n"); + goto unlock; + } + + next_buf = list_next_entry(buf, list); + /* If a new buffer (#next_buf) had not been queued to CSI, the old + * buffer (#buf) is still holding by CSI for storing the next + * frame. So, we queue a new buffer (#next_buf) to CSI then wait + * for next ISR call. + */ + if (!next_buf->queued_to_csi) { + next_buf->queued_to_csi = true; + sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr); + dev_dbg(video->csi->dev, "Frame droped!\n"); + goto unlock; + } + + list_del(&buf->list); + vbuf = &buf->vb; + vbuf->vb2_buf.timestamp = ktime_get_ns(); + vbuf->sequence = video->sequence; + vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE); + + /* Prepare buffer for next frame but one. */ + if (!list_is_last(&next_buf->list, &video->dma_queue)) { + next_buf = list_next_entry(next_buf, list); + next_buf->queued_to_csi = true; + sun6i_csi_update_buf_addr(video->csi, next_buf->dma_addr); + } else { + dev_dbg(video->csi->dev, "Next frame will be dropped!\n"); + } + +unlock: + video->sequence++; + spin_unlock(&video->dma_queue_lock); +} + +static const struct vb2_ops sun6i_csi_vb2_ops = { + .queue_setup = sun6i_video_queue_setup, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .buf_prepare = sun6i_video_buffer_prepare, + .start_streaming = sun6i_video_start_streaming, + .stop_streaming = sun6i_video_stop_streaming, + .buf_queue = sun6i_video_buffer_queue, +}; + +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct sun6i_video *video = video_drvdata(file); + + strscpy(cap->driver, "sun6i-video", sizeof(cap->driver)); + strscpy(cap->card, video->vdev.name, sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", + video->csi->dev->of_node->name); + + return 0; +} + +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + u32 index = f->index; + + if (index >= ARRAY_SIZE(supported_pixformats)) + return -EINVAL; + + f->pixelformat = supported_pixformats[index]; + + return 0; +} + +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct sun6i_video *video = video_drvdata(file); + + *fmt = video->fmt; + + return 0; +} + +static int sun6i_video_try_fmt(struct sun6i_video *video, + struct v4l2_format *f) +{ + struct v4l2_pix_format *pixfmt = &f->fmt.pix; + int bpp; + + if (!is_pixformat_valid(pixfmt->pixelformat)) + pixfmt->pixelformat = supported_pixformats[0]; + + v4l_bound_align_image(&pixfmt->width, MIN_WIDTH, MAX_WIDTH, 1, + &pixfmt->height, MIN_HEIGHT, MAX_WIDTH, 1, 1); + + bpp = sun6i_csi_get_bpp(pixfmt->pixelformat); + pixfmt->bytesperline = (pixfmt->width * bpp) >> 3; + pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; + + if (pixfmt->field == V4L2_FIELD_ANY) + pixfmt->field = V4L2_FIELD_NONE; + + pixfmt->colorspace = V4L2_COLORSPACE_RAW; + pixfmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; + pixfmt->quantization = V4L2_QUANTIZATION_DEFAULT; + pixfmt->xfer_func = V4L2_XFER_FUNC_DEFAULT; + + return 0; +} + +static int sun6i_video_set_fmt(struct sun6i_video *video, struct v4l2_format *f) +{ + int ret; + + ret = sun6i_video_try_fmt(video, f); + if (ret) + return ret; + + video->fmt = *f; + + return 0; +} + +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct sun6i_video *video = video_drvdata(file); + + if (vb2_is_busy(&video->vb2_vidq)) + return -EBUSY; + + return sun6i_video_set_fmt(video, f); +} + +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct sun6i_video *video = video_drvdata(file); + + return sun6i_video_try_fmt(video, f); +} + +static int vidioc_enum_input(struct file *file, void *fh, + struct v4l2_input *inp) +{ + if (inp->index != 0) + return -EINVAL; + + strlcpy(inp->name, "camera", sizeof(inp->name)); + inp->type = V4L2_INPUT_TYPE_CAMERA; + + return 0; +} + +static int vidioc_g_input(struct file *file, void *fh, unsigned int *i) +{ + *i = 0; + + return 0; +} + +static int vidioc_s_input(struct file *file, void *fh, unsigned int i) +{ + if (i != 0) + return -EINVAL; + + return 0; +} + +static const struct v4l2_ioctl_ops sun6i_video_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, + + .vidioc_enum_input = vidioc_enum_input, + .vidioc_s_input = vidioc_s_input, + .vidioc_g_input = vidioc_g_input, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +/* ----------------------------------------------------------------------------- + * V4L2 file operations + */ +static int sun6i_video_open(struct file *file) +{ + struct sun6i_video *video = video_drvdata(file); + int ret; + + if (mutex_lock_interruptible(&video->lock)) + return -ERESTARTSYS; + + ret = v4l2_fh_open(file); + if (ret < 0) + goto unlock; + + ret = v4l2_pipeline_pm_use(&video->vdev.entity, 1); + if (ret < 0) + goto fh_release; + + /* check if already powered */ + if (!v4l2_fh_is_singular_file(file)) + goto unlock; + + ret = sun6i_csi_set_power(video->csi, true); + if (ret < 0) + goto fh_release; + + mutex_unlock(&video->lock); + return 0; + +fh_release: + v4l2_fh_release(file); +unlock: + mutex_unlock(&video->lock); + return ret; +} + +static int sun6i_video_close(struct file *file) +{ + struct sun6i_video *video = video_drvdata(file); + bool last_fh; + + mutex_lock(&video->lock); + + last_fh = v4l2_fh_is_singular_file(file); + + _vb2_fop_release(file, NULL); + + v4l2_pipeline_pm_use(&video->vdev.entity, 0); + + if (last_fh) + sun6i_csi_set_power(video->csi, false); + + mutex_unlock(&video->lock); + + return 0; +} + +static const struct v4l2_file_operations sun6i_video_fops = { + .owner = THIS_MODULE, + .open = sun6i_video_open, + .release = sun6i_video_close, + .unlocked_ioctl = video_ioctl2, + .mmap = vb2_fop_mmap, + .poll = vb2_fop_poll +}; + +/* ----------------------------------------------------------------------------- + * Media Operations + */ +static int sun6i_video_link_validate_get_format(struct media_pad *pad, + struct v4l2_subdev_format *fmt) +{ + if (is_media_entity_v4l2_subdev(pad->entity)) { + struct v4l2_subdev *sd = + media_entity_to_v4l2_subdev(pad->entity); + + fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE; + fmt->pad = pad->index; + return v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt); + } + + return -EINVAL; +} + +static int sun6i_video_link_validate(struct media_link *link) +{ + struct video_device *vdev = container_of(link->sink->entity, + struct video_device, entity); + struct sun6i_video *video = video_get_drvdata(vdev); + struct v4l2_subdev_format source_fmt; + int ret; + + video->mbus_code = 0; + + if (!media_entity_remote_pad(link->sink->entity->pads)) { + dev_info(video->csi->dev, + "video node %s pad not connected\n", vdev->name); + return -ENOLINK; + } + + ret = sun6i_video_link_validate_get_format(link->source, &source_fmt); + if (ret < 0) + return ret; + + if (!sun6i_csi_is_format_supported(video->csi, + video->fmt.fmt.pix.pixelformat, + source_fmt.format.code)) { + dev_err(video->csi->dev, + "Unsupported pixformat: 0x%x with mbus code: 0x%x!\n", + video->fmt.fmt.pix.pixelformat, + source_fmt.format.code); + return -EPIPE; + } + + if (source_fmt.format.width != video->fmt.fmt.pix.width || + source_fmt.format.height != video->fmt.fmt.pix.height) { + dev_err(video->csi->dev, + "Wrong width or height %ux%u (%ux%u expected)\n", + video->fmt.fmt.pix.width, video->fmt.fmt.pix.height, + source_fmt.format.width, source_fmt.format.height); + return -EPIPE; + } + + video->mbus_code = source_fmt.format.code; + + return 0; +} + +static const struct media_entity_operations sun6i_video_media_ops = { + .link_validate = sun6i_video_link_validate +}; + +int sun6i_video_init(struct sun6i_video *video, struct sun6i_csi *csi, + const char *name) +{ + struct video_device *vdev = &video->vdev; + struct vb2_queue *vidq = &video->vb2_vidq; + struct v4l2_format fmt = { 0 }; + int ret; + + video->csi = csi; + + /* Initialize the media entity... */ + video->pad.flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT; + vdev->entity.ops = &sun6i_video_media_ops; + ret = media_entity_pads_init(&vdev->entity, 1, &video->pad); + if (ret < 0) + return ret; + + mutex_init(&video->lock); + + INIT_LIST_HEAD(&video->dma_queue); + spin_lock_init(&video->dma_queue_lock); + + video->sequence = 0; + + /* Setup default format */ + fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + fmt.fmt.pix.pixelformat = supported_pixformats[0]; + fmt.fmt.pix.width = 1280; + fmt.fmt.pix.height = 720; + fmt.fmt.pix.field = V4L2_FIELD_NONE; + sun6i_video_set_fmt(video, &fmt); + + /* Initialize videobuf2 queue */ + vidq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + vidq->io_modes = VB2_MMAP | VB2_DMABUF; + vidq->drv_priv = video; + vidq->buf_struct_size = sizeof(struct sun6i_csi_buffer); + vidq->ops = &sun6i_csi_vb2_ops; + vidq->mem_ops = &vb2_dma_contig_memops; + vidq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + vidq->lock = &video->lock; + /* Make sure non-dropped frame */ + vidq->min_buffers_needed = 3; + vidq->dev = csi->dev; + + ret = vb2_queue_init(vidq); + if (ret) { + v4l2_err(&csi->v4l2_dev, "vb2_queue_init failed: %d\n", ret); + goto clean_entity; + } + + /* Register video device */ + strlcpy(vdev->name, name, sizeof(vdev->name)); + vdev->release = video_device_release_empty; + vdev->fops = &sun6i_video_fops; + vdev->ioctl_ops = &sun6i_video_ioctl_ops; + vdev->vfl_type = VFL_TYPE_GRABBER; + vdev->vfl_dir = VFL_DIR_RX; + vdev->v4l2_dev = &csi->v4l2_dev; + vdev->queue = vidq; + vdev->lock = &video->lock; + vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE; + video_set_drvdata(vdev, video); + + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + v4l2_err(&csi->v4l2_dev, + "video_register_device failed: %d\n", ret); + goto release_vb2; + } + + return 0; + +release_vb2: + vb2_queue_release(&video->vb2_vidq); +clean_entity: + media_entity_cleanup(&video->vdev.entity); + mutex_destroy(&video->lock); + return ret; +} + +void sun6i_video_cleanup(struct sun6i_video *video) +{ + video_unregister_device(&video->vdev); + media_entity_cleanup(&video->vdev.entity); + vb2_queue_release(&video->vb2_vidq); + mutex_destroy(&video->lock); +} diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.h b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.h new file mode 100644 index 000000000000..b9cd919c24ac --- /dev/null +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing) + * All rights reserved. + * Author: Yong Deng <yong.deng@magewell.com> + */ + +#ifndef __SUN6I_VIDEO_H__ +#define __SUN6I_VIDEO_H__ + +#include <media/v4l2-dev.h> +#include <media/videobuf2-core.h> + +struct sun6i_csi; + +struct sun6i_video { + struct video_device vdev; + struct media_pad pad; + struct sun6i_csi *csi; + + struct mutex lock; + + struct vb2_queue vb2_vidq; + spinlock_t dma_queue_lock; + struct list_head dma_queue; + + unsigned int sequence; + struct v4l2_format fmt; + u32 mbus_code; +}; + +int sun6i_video_init(struct sun6i_video *video, struct sun6i_csi *csi, + const char *name); +void sun6i_video_cleanup(struct sun6i_video *video); + +void sun6i_video_frame_done(struct sun6i_video *video); + +#endif /* __SUN6I_VIDEO_H__ */ |