From 8f4208f42c896b71abe54b697cd044f0af490e67 Mon Sep 17 00:00:00 2001 From: Naushir Patuck Date: Wed, 1 Apr 2020 08:39:49 +0100 Subject: [PATCH] media: bcm2835-unicam: Driver for CCP2/CSI2 camera interface Add driver for the Unicam camera receiver block on BCM283x processors. This commit is made up of a series of changes cherry-picked from the rpi-4.19.y branch. Signed-off-by: Dave Stevenson Signed-off-by: Naushir Patuck --- MAINTAINERS | 2 +- drivers/media/platform/Kconfig | 1 + drivers/media/platform/Makefile | 2 + drivers/media/platform/bcm2835/Kconfig | 14 + drivers/media/platform/bcm2835/Makefile | 3 + .../media/platform/bcm2835/bcm2835-unicam.c | 2369 +++++++++++++++++ .../media/platform/bcm2835/vc4-regs-unicam.h | 253 ++ 7 files changed, 2643 insertions(+), 1 deletion(-) create mode 100644 drivers/media/platform/bcm2835/Kconfig create mode 100644 drivers/media/platform/bcm2835/Makefile create mode 100644 drivers/media/platform/bcm2835/bcm2835-unicam.c create mode 100644 drivers/media/platform/bcm2835/vc4-regs-unicam.h --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3562,7 +3562,7 @@ F: Documentation/devicetree/bindings/med F: drivers/staging/media/rpivid BROADCOM BCM2835 CAMERA DRIVER -M: Dave Stevenson +M: Raspberry Pi Kernel Maintenance L: linux-media@vger.kernel.org S: Maintained F: drivers/media/platform/bcm2835/ --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -170,6 +170,7 @@ source "drivers/media/platform/am437x/Kc source "drivers/media/platform/xilinx/Kconfig" source "drivers/media/platform/rcar-vin/Kconfig" source "drivers/media/platform/atmel/Kconfig" +source "drivers/media/platform/bcm2835/Kconfig" source "drivers/media/platform/sunxi/Kconfig" config VIDEO_TI_CAL --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -83,6 +83,8 @@ obj-$(CONFIG_VIDEO_QCOM_CAMSS) += qcom/ obj-$(CONFIG_VIDEO_QCOM_VENUS) += qcom/venus/ +obj-y += bcm2835/ + obj-y += sunxi/ obj-$(CONFIG_VIDEO_MESON_GE2D) += meson/ge2d/ --- /dev/null +++ b/drivers/media/platform/bcm2835/Kconfig @@ -0,0 +1,14 @@ +# Broadcom VideoCore4 V4L2 camera support + +config VIDEO_BCM2835_UNICAM + tristate "Broadcom BCM2835 Unicam video capture driver" + depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && MEDIA_CONTROLLER + depends on ARCH_BCM2835 || COMPILE_TEST + select VIDEOBUF2_DMA_CONTIG + select V4L2_FWNODE + help + Say Y here to enable V4L2 subdevice for CSI2 receiver. + This is a V4L2 subdevice that interfaces directly to the VC4 peripheral. + + To compile this driver as a module, choose M here. The module + will be called bcm2835-unicam. --- /dev/null +++ b/drivers/media/platform/bcm2835/Makefile @@ -0,0 +1,3 @@ +# Makefile for BCM2835 Unicam driver + +obj-$(CONFIG_VIDEO_BCM2835_UNICAM) += bcm2835-unicam.o --- /dev/null +++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c @@ -0,0 +1,2369 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * BCM2835 Unicam Capture Driver + * + * Copyright (C) 2017-2020 - Raspberry Pi (Trading) Ltd. + * + * Dave Stevenson + * + * Based on TI am437x driver by + * Benoit Parrot + * Lad, Prabhakar + * + * and TI CAL camera interface driver by + * Benoit Parrot + * + * + * There are two camera drivers in the kernel for BCM283x - this one + * and bcm2835-camera (currently in staging). + * + * This driver directly controls the Unicam peripheral - there is no + * involvement with the VideoCore firmware. Unicam receives CSI-2 or + * CCP2 data and writes it into SDRAM. + * The only potential processing options are to repack Bayer data into an + * alternate format, and applying windowing. + * The repacking does not shift the data, so can repack V4L2_PIX_FMT_Sxxxx10P + * to V4L2_PIX_FMT_Sxxxx10, or V4L2_PIX_FMT_Sxxxx12P to V4L2_PIX_FMT_Sxxxx12, + * but not generically up to V4L2_PIX_FMT_Sxxxx16. The driver will add both + * formats where the relevant formats are defined, and will automatically + * configure the repacking as required. + * Support for windowing may be added later. + * + * It should be possible to connect this driver to any sensor with a + * suitable output interface and V4L2 subdevice driver. + * + * bcm2835-camera uses the VideoCore firmware to control the sensor, + * Unicam, ISP, and all tuner control loops. Fully processed frames are + * delivered to the driver by the firmware. It only has sensor drivers + * for Omnivision OV5647, and Sony IMX219 sensors. + * + * The two drivers are mutually exclusive for the same Unicam instance. + * The VideoCore firmware checks the device tree configuration during boot. + * If it finds device tree nodes called csi0 or csi1 it will block the + * firmware from accessing the peripheral, and bcm2835-camera will + * not be able to stream data. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "vc4-regs-unicam.h" + +#define UNICAM_MODULE_NAME "unicam" +#define UNICAM_VERSION "0.1.0" + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Debug level 0-3"); + +#define unicam_dbg(level, dev, fmt, arg...) \ + v4l2_dbg(level, debug, &(dev)->v4l2_dev, fmt, ##arg) +#define unicam_info(dev, fmt, arg...) \ + v4l2_info(&(dev)->v4l2_dev, fmt, ##arg) +#define unicam_err(dev, fmt, arg...) \ + v4l2_err(&(dev)->v4l2_dev, fmt, ##arg) + +/* To protect against a dodgy sensor driver never returning an error from + * enum_mbus_code, set a maximum index value to be used. + */ +#define MAX_ENUM_MBUS_CODE 128 + +/* + * Stride is a 16 bit register, but also has to be a multiple of 32. + */ +#define BPL_ALIGNMENT 32 +#define MAX_BYTESPERLINE ((1 << 16) - BPL_ALIGNMENT) +/* + * Max width is therefore determined by the max stride divided by + * the number of bits per pixel. Take 32bpp as a + * worst case. + * No imposed limit on the height, so adopt a square image for want + * of anything better. + */ +#define MAX_WIDTH (MAX_BYTESPERLINE / 4) +#define MAX_HEIGHT MAX_WIDTH +/* Define a nominal minimum image size */ +#define MIN_WIDTH 16 +#define MIN_HEIGHT 16 + +/* + * struct unicam_fmt - Unicam media bus format information + * @pixelformat: V4L2 pixel format FCC identifier. 0 if n/a. + * @repacked_fourcc: V4L2 pixel format FCC identifier if the data is expanded + * out to 16bpp. 0 if n/a. + * @code: V4L2 media bus format code. + * @depth: Bits per pixel as delivered from the source. + * @csi_dt: CSI data type. + * @check_variants: Flag to denote that there are multiple mediabus formats + * still in the list that could match this V4L2 format. + */ +struct unicam_fmt { + u32 fourcc; + u32 repacked_fourcc; + u32 code; + u8 depth; + u8 csi_dt; + u8 check_variants; +}; + +static const struct unicam_fmt formats[] = { + /* YUV Formats */ + { + .fourcc = V4L2_PIX_FMT_YUYV, + .code = MEDIA_BUS_FMT_YUYV8_2X8, + .depth = 16, + .csi_dt = 0x1e, + .check_variants = 1, + }, { + .fourcc = V4L2_PIX_FMT_UYVY, + .code = MEDIA_BUS_FMT_UYVY8_2X8, + .depth = 16, + .csi_dt = 0x1e, + .check_variants = 1, + }, { + .fourcc = V4L2_PIX_FMT_YVYU, + .code = MEDIA_BUS_FMT_YVYU8_2X8, + .depth = 16, + .csi_dt = 0x1e, + .check_variants = 1, + }, { + .fourcc = V4L2_PIX_FMT_VYUY, + .code = MEDIA_BUS_FMT_VYUY8_2X8, + .depth = 16, + .csi_dt = 0x1e, + .check_variants = 1, + }, { + .fourcc = V4L2_PIX_FMT_YUYV, + .code = MEDIA_BUS_FMT_YUYV8_1X16, + .depth = 16, + .csi_dt = 0x1e, + }, { + .fourcc = V4L2_PIX_FMT_UYVY, + .code = MEDIA_BUS_FMT_UYVY8_1X16, + .depth = 16, + .csi_dt = 0x1e, + }, { + .fourcc = V4L2_PIX_FMT_YVYU, + .code = MEDIA_BUS_FMT_YVYU8_1X16, + .depth = 16, + .csi_dt = 0x1e, + }, { + .fourcc = V4L2_PIX_FMT_VYUY, + .code = MEDIA_BUS_FMT_VYUY8_1X16, + .depth = 16, + .csi_dt = 0x1e, + }, { + /* RGB Formats */ + .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */ + .code = MEDIA_BUS_FMT_RGB565_2X8_LE, + .depth = 16, + .csi_dt = 0x22, + }, { + .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */ + .code = MEDIA_BUS_FMT_RGB565_2X8_BE, + .depth = 16, + .csi_dt = 0x22 + }, { + .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */ + .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE, + .depth = 16, + .csi_dt = 0x21, + }, { + .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */ + .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE, + .depth = 16, + .csi_dt = 0x21, + }, { + .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */ + .code = MEDIA_BUS_FMT_RGB888_1X24, + .depth = 24, + .csi_dt = 0x24, + }, { + .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */ + .code = MEDIA_BUS_FMT_BGR888_1X24, + .depth = 24, + .csi_dt = 0x24, + }, { + .fourcc = V4L2_PIX_FMT_RGB32, /* argb */ + .code = MEDIA_BUS_FMT_ARGB8888_1X32, + .depth = 32, + .csi_dt = 0x0, + }, { + /* Bayer Formats */ + .fourcc = V4L2_PIX_FMT_SBGGR8, + .code = MEDIA_BUS_FMT_SBGGR8_1X8, + .depth = 8, + .csi_dt = 0x2a, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG8, + .code = MEDIA_BUS_FMT_SGBRG8_1X8, + .depth = 8, + .csi_dt = 0x2a, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG8, + .code = MEDIA_BUS_FMT_SGRBG8_1X8, + .depth = 8, + .csi_dt = 0x2a, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB8, + .code = MEDIA_BUS_FMT_SRGGB8_1X8, + .depth = 8, + .csi_dt = 0x2a, + }, { + .fourcc = V4L2_PIX_FMT_SBGGR10P, + .repacked_fourcc = V4L2_PIX_FMT_SBGGR10, + .code = MEDIA_BUS_FMT_SBGGR10_1X10, + .depth = 10, + .csi_dt = 0x2b, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG10P, + .repacked_fourcc = V4L2_PIX_FMT_SGBRG10, + .code = MEDIA_BUS_FMT_SGBRG10_1X10, + .depth = 10, + .csi_dt = 0x2b, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG10P, + .repacked_fourcc = V4L2_PIX_FMT_SGRBG10, + .code = MEDIA_BUS_FMT_SGRBG10_1X10, + .depth = 10, + .csi_dt = 0x2b, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB10P, + .repacked_fourcc = V4L2_PIX_FMT_SRGGB10, + .code = MEDIA_BUS_FMT_SRGGB10_1X10, + .depth = 10, + .csi_dt = 0x2b, + }, { + .fourcc = V4L2_PIX_FMT_SBGGR12P, + .repacked_fourcc = V4L2_PIX_FMT_SBGGR12, + .code = MEDIA_BUS_FMT_SBGGR12_1X12, + .depth = 12, + .csi_dt = 0x2c, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG12P, + .repacked_fourcc = V4L2_PIX_FMT_SGBRG12, + .code = MEDIA_BUS_FMT_SGBRG12_1X12, + .depth = 12, + .csi_dt = 0x2c, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG12P, + .repacked_fourcc = V4L2_PIX_FMT_SGRBG12, + .code = MEDIA_BUS_FMT_SGRBG12_1X12, + .depth = 12, + .csi_dt = 0x2c, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB12P, + .repacked_fourcc = V4L2_PIX_FMT_SRGGB12, + .code = MEDIA_BUS_FMT_SRGGB12_1X12, + .depth = 12, + .csi_dt = 0x2c, + }, { + .fourcc = V4L2_PIX_FMT_SBGGR14P, + .code = MEDIA_BUS_FMT_SBGGR14_1X14, + .depth = 14, + .csi_dt = 0x2d, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG14P, + .code = MEDIA_BUS_FMT_SGBRG14_1X14, + .depth = 14, + .csi_dt = 0x2d, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG14P, + .code = MEDIA_BUS_FMT_SGRBG14_1X14, + .depth = 14, + .csi_dt = 0x2d, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB14P, + .code = MEDIA_BUS_FMT_SRGGB14_1X14, + .depth = 14, + .csi_dt = 0x2d, + }, { + /* + * 16 bit Bayer formats could be supported, but there is no CSI2 + * data_type defined for raw 16, and no sensors that produce it at + * present. + */ + + /* Greyscale formats */ + .fourcc = V4L2_PIX_FMT_GREY, + .code = MEDIA_BUS_FMT_Y8_1X8, + .depth = 8, + .csi_dt = 0x2a, + }, { + .fourcc = V4L2_PIX_FMT_Y10P, + .repacked_fourcc = V4L2_PIX_FMT_Y10, + .code = MEDIA_BUS_FMT_Y10_1X10, + .depth = 10, + .csi_dt = 0x2b, + }, { + /* NB There is no packed V4L2 fourcc for this format. */ + .repacked_fourcc = V4L2_PIX_FMT_Y12, + .code = MEDIA_BUS_FMT_Y12_1X12, + .depth = 12, + .csi_dt = 0x2c, + }, +}; + +struct unicam_dmaqueue { + struct list_head active; +}; + +struct unicam_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; +}; + +struct unicam_cfg { + /* peripheral base address */ + void __iomem *base; + /* clock gating base address */ + void __iomem *clk_gate_base; +}; + +#define MAX_POSSIBLE_PIX_FMTS (ARRAY_SIZE(formats)) + +struct unicam_device { + /* V4l2 specific parameters */ + /* Identifies video device for this channel */ + struct video_device video_dev; + struct v4l2_ctrl_handler ctrl_handler; + + struct v4l2_fwnode_endpoint endpoint; + + struct v4l2_async_subdev asd; + + /* unicam cfg */ + struct unicam_cfg cfg; + /* clock handle */ + struct clk *clock; + /* V4l2 device */ + struct v4l2_device v4l2_dev; + struct media_device mdev; + struct media_pad pad; + + /* parent device */ + struct platform_device *pdev; + /* subdevice async Notifier */ + struct v4l2_async_notifier notifier; + unsigned int sequence; + + /* ptr to sub device */ + struct v4l2_subdev *sensor; + /* Pad config for the sensor */ + struct v4l2_subdev_pad_config *sensor_config; + /* current input at the sub device */ + int current_input; + + /* Pointer pointing to current v4l2_buffer */ + struct unicam_buffer *cur_frm; + /* Pointer pointing to next v4l2_buffer */ + struct unicam_buffer *next_frm; + + /* video capture */ + const struct unicam_fmt *fmt; + /* Used to store current pixel format */ + struct v4l2_format v_fmt; + /* Used to store current mbus frame format */ + struct v4l2_mbus_framefmt m_fmt; + + unsigned int virtual_channel; + enum v4l2_mbus_type bus_type; + /* + * Stores bus.mipi_csi2.flags for CSI2 sensors, or + * bus.mipi_csi1.strobe for CCP2. + */ + unsigned int bus_flags; + unsigned int max_data_lanes; + unsigned int active_data_lanes; + + struct v4l2_rect crop; + + /* Currently selected input on subdev */ + int input; + + /* Buffer queue used in video-buf */ + struct vb2_queue buffer_queue; + /* Queue of filled frames */ + struct unicam_dmaqueue dma_queue; + /* IRQ lock for DMA queue */ + spinlock_t dma_queue_lock; + /* lock used to access this structure */ + struct mutex lock; + /* Flag to denote that we are processing buffers */ + int streaming; +}; + +/* Hardware access */ +#define clk_write(dev, val) writel((val) | 0x5a000000, (dev)->clk_gate_base) +#define clk_read(dev) readl((dev)->clk_gate_base) + +#define reg_read(dev, offset) readl((dev)->base + (offset)) +#define reg_write(dev, offset, val) writel(val, (dev)->base + (offset)) + +#define reg_read_field(dev, offset, mask) get_field(reg_read((dev), (offset), \ + mask)) + +static inline int get_field(u32 value, u32 mask) +{ + return (value & mask) >> __ffs(mask); +} + +static inline void set_field(u32 *valp, u32 field, u32 mask) +{ + u32 val = *valp; + + val &= ~mask; + val |= (field << __ffs(mask)) & mask; + *valp = val; +} + +static inline void reg_write_field(struct unicam_cfg *dev, u32 offset, + u32 field, u32 mask) +{ + u32 val = reg_read((dev), (offset)); + + set_field(&val, field, mask); + reg_write((dev), (offset), val); +} + +/* Power management functions */ +static inline int unicam_runtime_get(struct unicam_device *dev) +{ + return pm_runtime_get_sync(&dev->pdev->dev); +} + +static inline void unicam_runtime_put(struct unicam_device *dev) +{ + pm_runtime_put_sync(&dev->pdev->dev); +} + +/* Format setup functions */ +static const struct unicam_fmt *find_format_by_code(u32 code) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(formats); i++) { + if (formats[i].code == code) + return &formats[i]; + } + + return NULL; +} + +static int check_mbus_format(struct unicam_device *dev, + const struct unicam_fmt *format) +{ + struct v4l2_subdev_mbus_code_enum mbus_code; + int ret = 0; + int i; + + for (i = 0; !ret && i < MAX_ENUM_MBUS_CODE; i++) { + memset(&mbus_code, 0, sizeof(mbus_code)); + mbus_code.index = i; + mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE; + + ret = v4l2_subdev_call(dev->sensor, pad, enum_mbus_code, + NULL, &mbus_code); + + if (!ret && mbus_code.code == format->code) + return 1; + } + + return 0; +} + +static const struct unicam_fmt *find_format_by_pix(struct unicam_device *dev, + u32 pixelformat) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(formats); i++) { + if (formats[i].fourcc == pixelformat || + formats[i].repacked_fourcc == pixelformat) { + if (formats[i].check_variants && + !check_mbus_format(dev, &formats[i])) + continue; + return &formats[i]; + } + } + + return NULL; +} + +static inline unsigned int bytes_per_line(u32 width, + const struct unicam_fmt *fmt, + u32 v4l2_fourcc) +{ + if (v4l2_fourcc == fmt->repacked_fourcc) + /* Repacking always goes to 16bpp */ + return ALIGN(width << 1, BPL_ALIGNMENT); + else + return ALIGN((width * fmt->depth) >> 3, BPL_ALIGNMENT); +} + +static int __subdev_get_format(struct unicam_device *dev, + struct v4l2_mbus_framefmt *fmt) +{ + struct v4l2_subdev_format sd_fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + int ret; + + ret = v4l2_subdev_call(dev->sensor, pad, get_fmt, dev->sensor_config, + &sd_fmt); + if (ret < 0) + return ret; + + *fmt = sd_fmt.format; + + unicam_dbg(1, dev, "%s %dx%d code:%04x\n", __func__, + fmt->width, fmt->height, fmt->code); + + return 0; +} + +static int __subdev_set_format(struct unicam_device *dev, + struct v4l2_mbus_framefmt *fmt) +{ + struct v4l2_subdev_format sd_fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + int ret; + + sd_fmt.format = *fmt; + + ret = v4l2_subdev_call(dev->sensor, pad, set_fmt, dev->sensor_config, + &sd_fmt); + if (ret < 0) + return ret; + + unicam_dbg(1, dev, "%s %dx%d code:%04x\n", __func__, + fmt->width, fmt->height, fmt->code); + + return 0; +} + +static int unicam_calc_format_size_bpl(struct unicam_device *dev, + const struct unicam_fmt *fmt, + struct v4l2_format *f) +{ + unsigned int min_bytesperline; + + v4l_bound_align_image(&f->fmt.pix.width, MIN_WIDTH, MAX_WIDTH, 2, + &f->fmt.pix.height, MIN_HEIGHT, MAX_HEIGHT, 0, + 0); + + min_bytesperline = bytes_per_line(f->fmt.pix.width, fmt, + f->fmt.pix.pixelformat); + + if (f->fmt.pix.bytesperline > min_bytesperline && + f->fmt.pix.bytesperline <= MAX_BYTESPERLINE) + f->fmt.pix.bytesperline = ALIGN(f->fmt.pix.bytesperline, + BPL_ALIGNMENT); + else + f->fmt.pix.bytesperline = min_bytesperline; + + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; + + unicam_dbg(3, dev, "%s: fourcc: %08X size: %dx%d bpl:%d img_size:%d\n", + __func__, + f->fmt.pix.pixelformat, + f->fmt.pix.width, f->fmt.pix.height, + f->fmt.pix.bytesperline, f->fmt.pix.sizeimage); + + return 0; +} + +static int unicam_reset_format(struct unicam_device *dev) +{ + struct v4l2_mbus_framefmt mbus_fmt; + int ret; + + ret = __subdev_get_format(dev, &mbus_fmt); + if (ret) { + unicam_err(dev, "Failed to get_format - ret %d\n", ret); + return ret; + } + + if (mbus_fmt.code != dev->fmt->code) { + unicam_err(dev, "code mismatch - fmt->code %08x, mbus_fmt.code %08x\n", + dev->fmt->code, mbus_fmt.code); + return ret; + } + + v4l2_fill_pix_format(&dev->v_fmt.fmt.pix, &mbus_fmt); + dev->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + + unicam_calc_format_size_bpl(dev, dev->fmt, &dev->v_fmt); + + dev->m_fmt = mbus_fmt; + + return 0; +} + +static void unicam_wr_dma_addr(struct unicam_device *dev, dma_addr_t dmaaddr) +{ + /* + * dmaaddr should be a 32-bit address with the top two bits set to 0x3 + * to signify uncached access through the Videocore memory controller. + */ + BUG_ON((dmaaddr >> 30) != 0x3); + + reg_write(&dev->cfg, UNICAM_IBSA0, dmaaddr); + reg_write(&dev->cfg, UNICAM_IBEA0, + dmaaddr + dev->v_fmt.fmt.pix.sizeimage); +} + +static inline unsigned int unicam_get_lines_done(struct unicam_device *dev) +{ + dma_addr_t start_addr, cur_addr; + unsigned int stride = dev->v_fmt.fmt.pix.bytesperline; + struct unicam_buffer *frm = dev->cur_frm; + + if (!frm) + return 0; + + start_addr = vb2_dma_contig_plane_dma_addr(&frm->vb.vb2_buf, 0); + cur_addr = reg_read(&dev->cfg, UNICAM_IBWP); + return (unsigned int)(cur_addr - start_addr) / stride; +} + +static inline void unicam_schedule_next_buffer(struct unicam_device *dev) +{ + struct unicam_dmaqueue *dma_q = &dev->dma_queue; + struct unicam_buffer *buf; + dma_addr_t addr; + + buf = list_entry(dma_q->active.next, struct unicam_buffer, list); + dev->next_frm = buf; + list_del(&buf->list); + + addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0); + unicam_wr_dma_addr(dev, addr); +} + +static inline void unicam_process_buffer_complete(struct unicam_device *dev) +{ + dev->cur_frm->vb.field = dev->m_fmt.field; + dev->cur_frm->vb.sequence = dev->sequence++; + + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE); + dev->cur_frm = dev->next_frm; +} + +/* + * unicam_isr : ISR handler for unicam capture + * @irq: irq number + * @dev_id: dev_id ptr + * + * It changes status of the captured buffer, takes next buffer from the queue + * and sets its address in unicam registers + */ +static irqreturn_t unicam_isr(int irq, void *dev) +{ + struct unicam_device *unicam = (struct unicam_device *)dev; + struct unicam_cfg *cfg = &unicam->cfg; + struct unicam_dmaqueue *dma_q = &unicam->dma_queue; + unsigned int lines_done = unicam_get_lines_done(dev); + unsigned int sequence = unicam->sequence; + int ista, sta; + + /* + * Don't service interrupts if not streaming. + * Avoids issues if the VPU should enable the + * peripheral without the kernel knowing (that + * shouldn't happen, but causes issues if it does). + */ + if (!unicam->streaming) + return IRQ_HANDLED; + + sta = reg_read(cfg, UNICAM_STA); + /* Write value back to clear the interrupts */ + reg_write(cfg, UNICAM_STA, sta); + + ista = reg_read(cfg, UNICAM_ISTA); + /* Write value back to clear the interrupts */ + reg_write(cfg, UNICAM_ISTA, ista); + + unicam_dbg(3, unicam, "ISR: ISTA: 0x%X, STA: 0x%X, sequence %d, lines done %d", + ista, sta, sequence, lines_done); + + if (!(sta && (UNICAM_IS | UNICAM_PI0))) + return IRQ_HANDLED; + + if (ista & UNICAM_FSI) { + /* + * Timestamp is to be when the first data byte was captured, + * aka frame start. + */ + if (unicam->cur_frm) + unicam->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns(); + } + if (ista & UNICAM_FEI || sta & UNICAM_PI0) { + /* + * Ensure we have swapped buffers already as we can't + * stop the peripheral. Overwrite the frame we've just + * captured instead. + */ + if (unicam->cur_frm && unicam->cur_frm != unicam->next_frm) + unicam_process_buffer_complete(unicam); + } + + /* Cannot swap buffer at frame end, there may be a race condition + * where the HW does not actually swap it if the new frame has + * already started. + */ + if (ista & (UNICAM_FSI | UNICAM_LCI) && !(ista & UNICAM_FEI)) { + spin_lock(&unicam->dma_queue_lock); + if (!list_empty(&dma_q->active) && + unicam->cur_frm == unicam->next_frm) + unicam_schedule_next_buffer(unicam); + spin_unlock(&unicam->dma_queue_lock); + } + + if (reg_read(&unicam->cfg, UNICAM_ICTL) & UNICAM_FCM) { + /* Switch out of trigger mode if selected */ + reg_write_field(&unicam->cfg, UNICAM_ICTL, 1, UNICAM_TFC); + reg_write_field(&unicam->cfg, UNICAM_ICTL, 0, UNICAM_FCM); + } + return IRQ_HANDLED; +} + +static int unicam_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct unicam_device *dev = video_drvdata(file); + + strlcpy(cap->driver, UNICAM_MODULE_NAME, sizeof(cap->driver)); + strlcpy(cap->card, UNICAM_MODULE_NAME, sizeof(cap->card)); + + snprintf(cap->bus_info, sizeof(cap->bus_info), + "platform:%s", dev->v4l2_dev.name); + + return 0; +} + +static int unicam_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct unicam_device *dev = video_drvdata(file); + struct v4l2_subdev_mbus_code_enum mbus_code; + const struct unicam_fmt *fmt = NULL; + int index = 0; + int ret = 0; + int i; + + for (i = 0; !ret && i < MAX_ENUM_MBUS_CODE; i++) { + memset(&mbus_code, 0, sizeof(mbus_code)); + mbus_code.index = i; + + ret = v4l2_subdev_call(dev->sensor, pad, enum_mbus_code, + NULL, &mbus_code); + if (ret < 0) { + unicam_dbg(2, dev, + "subdev->enum_mbus_code idx %d returned %d - index invalid\n", + i, ret); + return -EINVAL; + } + + fmt = find_format_by_code(mbus_code.code); + if (fmt) { + if (fmt->fourcc) { + if (index == f->index) { + f->pixelformat = fmt->fourcc; + break; + } + index++; + } + if (fmt->repacked_fourcc) { + if (index == f->index) { + f->pixelformat = fmt->repacked_fourcc; + break; + } + index++; + } + } + } + + return 0; +} + +static int unicam_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct unicam_device *dev = video_drvdata(file); + + *f = dev->v_fmt; + + return 0; +} + +static +const struct unicam_fmt *get_first_supported_format(struct unicam_device *dev) +{ + struct v4l2_subdev_mbus_code_enum mbus_code; + const struct unicam_fmt *fmt = NULL; + int ret; + int j; + + for (j = 0; ret != -EINVAL && ret != -ENOIOCTLCMD; ++j) { + memset(&mbus_code, 0, sizeof(mbus_code)); + mbus_code.index = j; + ret = v4l2_subdev_call(dev->sensor, pad, enum_mbus_code, NULL, + &mbus_code); + if (ret < 0) { + unicam_dbg(2, dev, + "subdev->enum_mbus_code idx %d returned %d - continue\n", + j, ret); + continue; + } + + unicam_dbg(2, dev, "subdev %s: code: 0x%08x idx: %d\n", + dev->sensor->name, mbus_code.code, j); + + fmt = find_format_by_code(mbus_code.code); + unicam_dbg(2, dev, "fmt 0x%08x returned as %p, V4L2 FOURCC 0x%08x, csi_dt 0x%02x\n", + mbus_code.code, fmt, fmt ? fmt->fourcc : 0, + fmt ? fmt->csi_dt : 0); + if (fmt) + return fmt; + } + + return NULL; +} + +static int unicam_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct unicam_device *dev = video_drvdata(file); + struct v4l2_subdev_format sd_fmt = { + .which = V4L2_SUBDEV_FORMAT_TRY, + }; + struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format; + const struct unicam_fmt *fmt; + int ret; + + fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat); + if (!fmt) { + /* Pixel format not supported by unicam. Choose the first + * supported format, and let the sensor choose something else. + */ + unicam_dbg(3, dev, "Fourcc format (0x%08x) not found. Use first format.\n", + f->fmt.pix.pixelformat); + + fmt = &formats[0]; + f->fmt.pix.pixelformat = fmt->fourcc; + } + + v4l2_fill_mbus_format(mbus_fmt, &f->fmt.pix, fmt->code); + /* + * No support for receiving interlaced video, so never + * request it from the sensor subdev. + */ + mbus_fmt->field = V4L2_FIELD_NONE; + + ret = v4l2_subdev_call(dev->sensor, pad, set_fmt, dev->sensor_config, + &sd_fmt); + if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) + return ret; + + if (mbus_fmt->field != V4L2_FIELD_NONE) + unicam_info(dev, "Sensor trying to send interlaced video - results may be unpredictable\n"); + + v4l2_fill_pix_format(&f->fmt.pix, &sd_fmt.format); + if (mbus_fmt->code != fmt->code) { + /* Sensor has returned an alternate format */ + fmt = find_format_by_code(mbus_fmt->code); + if (!fmt) { + /* The alternate format is one unicam can't support. + * Find the first format that is supported by both, and + * then set that. + */ + fmt = get_first_supported_format(dev); + mbus_fmt->code = fmt->code; + + ret = v4l2_subdev_call(dev->sensor, pad, set_fmt, + dev->sensor_config, &sd_fmt); + if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) + return ret; + + if (mbus_fmt->field != V4L2_FIELD_NONE) + unicam_info(dev, "Sensor trying to send interlaced video - results may be unpredictable\n"); + + v4l2_fill_pix_format(&f->fmt.pix, &sd_fmt.format); + + if (mbus_fmt->code != fmt->code) { + /* We've set a format that the sensor reports + * as being supported, but it refuses to set it. + * Not much else we can do. + * Assume that the sensor driver may accept the + * format when it is set (rather than tried). + */ + unicam_err(dev, "Sensor won't accept default format, and Unicam can't support sensor default\n"); + } + } + + if (fmt->fourcc) + f->fmt.pix.pixelformat = fmt->fourcc; + else + f->fmt.pix.pixelformat = fmt->repacked_fourcc; + } + + return unicam_calc_format_size_bpl(dev, fmt, f); +} + +static int unicam_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct unicam_device *dev = video_drvdata(file); + struct vb2_queue *q = &dev->buffer_queue; + struct v4l2_mbus_framefmt mbus_fmt = {0}; + const struct unicam_fmt *fmt; + int ret; + + if (vb2_is_busy(q)) + return -EBUSY; + + ret = unicam_try_fmt_vid_cap(file, priv, f); + if (ret < 0) + return ret; + + fmt = find_format_by_pix(dev, f->fmt.pix.pixelformat); + if (!fmt) { + /* Unknown pixel format - adopt a default. + * This shouldn't happen as try_fmt should have resolved any + * issues first. + */ + fmt = get_first_supported_format(dev); + if (!fmt) + /* It shouldn't be possible to get here with no + * supported formats + */ + return -EINVAL; + f->fmt.pix.pixelformat = fmt->fourcc; + return -EINVAL; + } + + v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, fmt->code); + + ret = __subdev_set_format(dev, &mbus_fmt); + if (ret) { + unicam_dbg(3, dev, "%s __subdev_set_format failed %d\n", + __func__, ret); + return ret; + } + + /* Just double check nothing has gone wrong */ + if (mbus_fmt.code != fmt->code) { + unicam_dbg(3, dev, + "%s subdev changed format on us, this should not happen\n", + __func__); + return -EINVAL; + } + + dev->fmt = fmt; + dev->v_fmt.fmt.pix.pixelformat = f->fmt.pix.pixelformat; + dev->v_fmt.fmt.pix.bytesperline = f->fmt.pix.bytesperline; + unicam_reset_format(dev); + + unicam_dbg(3, dev, "%s %dx%d, mbus_fmt 0x%08X, V4L2 pix 0x%08X.\n", + __func__, dev->v_fmt.fmt.pix.width, + dev->v_fmt.fmt.pix.height, mbus_fmt.code, + dev->v_fmt.fmt.pix.pixelformat); + + *f = dev->v_fmt; + + return 0; +} + +static int unicam_queue_setup(struct vb2_queue *vq, + unsigned int *nbuffers, + unsigned int *nplanes, + unsigned int sizes[], + struct device *alloc_devs[]) +{ + struct unicam_device *dev = vb2_get_drv_priv(vq); + unsigned int size = dev->v_fmt.fmt.pix.sizeimage; + + if (vq->num_buffers + *nbuffers < 3) + *nbuffers = 3 - vq->num_buffers; + + if (*nplanes) { + if (sizes[0] < size) { + unicam_err(dev, "sizes[0] %i < size %u\n", sizes[0], + size); + return -EINVAL; + } + size = sizes[0]; + } + + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int unicam_buffer_prepare(struct vb2_buffer *vb) +{ + struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue); + struct unicam_buffer *buf = container_of(vb, struct unicam_buffer, + vb.vb2_buf); + unsigned long size; + + if (WARN_ON(!dev->fmt)) + return -EINVAL; + + size = dev->v_fmt.fmt.pix.sizeimage; + if (vb2_plane_size(vb, 0) < size) { + unicam_err(dev, "data will not fit into plane (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size); + return 0; +} + +static void unicam_buffer_queue(struct vb2_buffer *vb) +{ + struct unicam_device *dev = vb2_get_drv_priv(vb->vb2_queue); + struct unicam_buffer *buf = container_of(vb, struct unicam_buffer, + vb.vb2_buf); + struct unicam_dmaqueue *dma_queue = &dev->dma_queue; + unsigned long flags = 0; + + spin_lock_irqsave(&dev->dma_queue_lock, flags); + list_add_tail(&buf->list, &dma_queue->active); + spin_unlock_irqrestore(&dev->dma_queue_lock, flags); +} + +static void unicam_set_packing_config(struct unicam_device *dev) +{ + int pack, unpack; + u32 val; + + if (dev->v_fmt.fmt.pix.pixelformat == dev->fmt->fourcc) { + unpack = UNICAM_PUM_NONE; + pack = UNICAM_PPM_NONE; + } else { + switch (dev->fmt->depth) { + case 8: + unpack = UNICAM_PUM_UNPACK8; + break; + case 10: + unpack = UNICAM_PUM_UNPACK10; + break; + case 12: + unpack = UNICAM_PUM_UNPACK12; + break; + case 14: + unpack = UNICAM_PUM_UNPACK14; + break; + case 16: + unpack = UNICAM_PUM_UNPACK16; + break; + default: + unpack = UNICAM_PUM_NONE; + break; + } + + /* Repacking is always to 16bpp */ + pack = UNICAM_PPM_PACK16; + } + + val = 0; + set_field(&val, unpack, UNICAM_PUM_MASK); + set_field(&val, pack, UNICAM_PPM_MASK); + reg_write(&dev->cfg, UNICAM_IPIPE, val); +} + +static void unicam_cfg_image_id(struct unicam_device *dev) +{ + struct unicam_cfg *cfg = &dev->cfg; + + if (dev->bus_type == V4L2_MBUS_CSI2_DPHY) { + /* CSI2 mode */ + reg_write(cfg, UNICAM_IDI0, + (dev->virtual_channel << 6) | dev->fmt->csi_dt); + } else { + /* CCP2 mode */ + reg_write(cfg, UNICAM_IDI0, (0x80 | dev->fmt->csi_dt)); + } +} + +static void unicam_start_rx(struct unicam_device *dev, unsigned long addr) +{ + struct unicam_cfg *cfg = &dev->cfg; + int line_int_freq = dev->v_fmt.fmt.pix.height >> 2; + unsigned int i; + u32 val; + + if (line_int_freq < 128) + line_int_freq = 128; + + /* Enable lane clocks */ + val = 1; + for (i = 0; i < dev->active_data_lanes; i++) + val = val << 2 | 1; + clk_write(cfg, val); + + /* Basic init */ + reg_write(cfg, UNICAM_CTRL, UNICAM_MEM); + + /* Enable analogue control, and leave in reset. */ + val = UNICAM_AR; + set_field(&val, 7, UNICAM_CTATADJ_MASK); + set_field(&val, 7, UNICAM_PTATADJ_MASK); + reg_write(cfg, UNICAM_ANA, val); + usleep_range(1000, 2000); + + /* Come out of reset */ + reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_AR); + + /* Peripheral reset */ + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR); + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR); + + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE); + + /* Enable Rx control. */ + val = reg_read(cfg, UNICAM_CTRL); + if (dev->bus_type == V4L2_MBUS_CSI2_DPHY) { + set_field(&val, UNICAM_CPM_CSI2, UNICAM_CPM_MASK); + set_field(&val, UNICAM_DCM_STROBE, UNICAM_DCM_MASK); + } else { + set_field(&val, UNICAM_CPM_CCP2, UNICAM_CPM_MASK); + set_field(&val, dev->bus_flags, UNICAM_DCM_MASK); + } + /* Packet framer timeout */ + set_field(&val, 0xf, UNICAM_PFT_MASK); + set_field(&val, 128, UNICAM_OET_MASK); + reg_write(cfg, UNICAM_CTRL, val); + + reg_write(cfg, UNICAM_IHWIN, 0); + reg_write(cfg, UNICAM_IVWIN, 0); + + /* AXI bus access QoS setup */ + val = reg_read(&dev->cfg, UNICAM_PRI); + set_field(&val, 0, UNICAM_BL_MASK); + set_field(&val, 0, UNICAM_BS_MASK); + set_field(&val, 0xe, UNICAM_PP_MASK); + set_field(&val, 8, UNICAM_NP_MASK); + set_field(&val, 2, UNICAM_PT_MASK); + set_field(&val, 1, UNICAM_PE); + reg_write(cfg, UNICAM_PRI, val); + + reg_write_field(cfg, UNICAM_ANA, 0, UNICAM_DDL); + + /* Always start in trigger frame capture mode (UNICAM_FCM set) */ + val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM; + set_field(&val, line_int_freq, UNICAM_LCIE_MASK); + reg_write(cfg, UNICAM_ICTL, val); + reg_write(cfg, UNICAM_STA, UNICAM_STA_MASK_ALL); + reg_write(cfg, UNICAM_ISTA, UNICAM_ISTA_MASK_ALL); + + /* tclk_term_en */ + reg_write_field(cfg, UNICAM_CLT, 2, UNICAM_CLT1_MASK); + /* tclk_settle */ + reg_write_field(cfg, UNICAM_CLT, 6, UNICAM_CLT2_MASK); + /* td_term_en */ + reg_write_field(cfg, UNICAM_DLT, 2, UNICAM_DLT1_MASK); + /* ths_settle */ + reg_write_field(cfg, UNICAM_DLT, 6, UNICAM_DLT2_MASK); + /* trx_enable */ + reg_write_field(cfg, UNICAM_DLT, 0, UNICAM_DLT3_MASK); + + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_SOE); + + /* Packet compare setup - required to avoid missing frame ends */ + val = 0; + set_field(&val, 1, UNICAM_PCE); + set_field(&val, 1, UNICAM_GI); + set_field(&val, 1, UNICAM_CPH); + set_field(&val, 0, UNICAM_PCVC_MASK); + set_field(&val, 1, UNICAM_PCDT_MASK); + reg_write(cfg, UNICAM_CMP0, val); + + /* Enable clock lane and set up terminations */ + val = 0; + if (dev->bus_type == V4L2_MBUS_CSI2_DPHY) { + /* CSI2 */ + set_field(&val, 1, UNICAM_CLE); + set_field(&val, 1, UNICAM_CLLPE); + if (dev->bus_flags & V4L2_MBUS_CSI2_CONTINUOUS_CLOCK) { + set_field(&val, 1, UNICAM_CLTRE); + set_field(&val, 1, UNICAM_CLHSE); + } + } else { + /* CCP2 */ + set_field(&val, 1, UNICAM_CLE); + set_field(&val, 1, UNICAM_CLHSE); + set_field(&val, 1, UNICAM_CLTRE); + } + reg_write(cfg, UNICAM_CLK, val); + + /* + * Enable required data lanes with appropriate terminations. + * The same value needs to be written to UNICAM_DATn registers for + * the active lanes, and 0 for inactive ones. + */ + val = 0; + if (dev->bus_type == V4L2_MBUS_CSI2_DPHY) { + /* CSI2 */ + set_field(&val, 1, UNICAM_DLE); + set_field(&val, 1, UNICAM_DLLPE); + if (dev->bus_flags & V4L2_MBUS_CSI2_CONTINUOUS_CLOCK) { + set_field(&val, 1, UNICAM_DLTRE); + set_field(&val, 1, UNICAM_DLHSE); + } + } else { + /* CCP2 */ + set_field(&val, 1, UNICAM_DLE); + set_field(&val, 1, UNICAM_DLHSE); + set_field(&val, 1, UNICAM_DLTRE); + } + reg_write(cfg, UNICAM_DAT0, val); + + if (dev->active_data_lanes == 1) + val = 0; + reg_write(cfg, UNICAM_DAT1, val); + + if (dev->max_data_lanes > 2) { + /* + * Registers UNICAM_DAT2 and UNICAM_DAT3 only valid if the + * instance supports more than 2 data lanes. + */ + if (dev->active_data_lanes == 2) + val = 0; + reg_write(cfg, UNICAM_DAT2, val); + + if (dev->active_data_lanes == 3) + val = 0; + reg_write(cfg, UNICAM_DAT3, val); + } + + reg_write(&dev->cfg, UNICAM_IBLS, dev->v_fmt.fmt.pix.bytesperline); + unicam_wr_dma_addr(dev, addr); + unicam_set_packing_config(dev); + unicam_cfg_image_id(dev); + + /* Disabled embedded data */ + val = 0; + set_field(&val, 0, UNICAM_EDL_MASK); + reg_write(cfg, UNICAM_DCS, val); + + val = reg_read(cfg, UNICAM_MISC); + set_field(&val, 1, UNICAM_FL0); + set_field(&val, 1, UNICAM_FL1); + reg_write(cfg, UNICAM_MISC, val); + + /* Enable peripheral */ + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPE); + + /* Load image pointers */ + reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_LIP_MASK); + + /* + * Enable trigger only for the first frame to + * sync correctly to the FS from the source. + */ + reg_write_field(cfg, UNICAM_ICTL, 1, UNICAM_TFC); +} + +static void unicam_disable(struct unicam_device *dev) +{ + struct unicam_cfg *cfg = &dev->cfg; + + /* Analogue lane control disable */ + reg_write_field(cfg, UNICAM_ANA, 1, UNICAM_DDL); + + /* Stop the output engine */ + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_SOE); + + /* Disable the data lanes. */ + reg_write(cfg, UNICAM_DAT0, 0); + reg_write(cfg, UNICAM_DAT1, 0); + + if (dev->max_data_lanes > 2) { + reg_write(cfg, UNICAM_DAT2, 0); + reg_write(cfg, UNICAM_DAT3, 0); + } + + /* Peripheral reset */ + reg_write_field(cfg, UNICAM_CTRL, 1, UNICAM_CPR); + usleep_range(50, 100); + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPR); + + /* Disable peripheral */ + reg_write_field(cfg, UNICAM_CTRL, 0, UNICAM_CPE); + + /* Disable all lane clocks */ + clk_write(cfg, 0); +} + +static int unicam_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct unicam_device *dev = vb2_get_drv_priv(vq); + struct unicam_dmaqueue *dma_q = &dev->dma_queue; + struct unicam_buffer *buf, *tmp; + unsigned long addr = 0; + unsigned long flags; + int ret; + + spin_lock_irqsave(&dev->dma_queue_lock, flags); + buf = list_entry(dma_q->active.next, struct unicam_buffer, list); + dev->cur_frm = buf; + dev->next_frm = buf; + list_del(&buf->list); + spin_unlock_irqrestore(&dev->dma_queue_lock, flags); + + addr = vb2_dma_contig_plane_dma_addr(&dev->cur_frm->vb.vb2_buf, 0); + dev->sequence = 0; + + ret = unicam_runtime_get(dev); + if (ret < 0) { + unicam_dbg(3, dev, "unicam_runtime_get failed\n"); + goto err_release_buffers; + } + + dev->active_data_lanes = dev->max_data_lanes; + if (dev->bus_type == V4L2_MBUS_CSI2_DPHY && + v4l2_subdev_has_op(dev->sensor, video, g_mbus_config)) { + struct v4l2_mbus_config mbus_config; + + ret = v4l2_subdev_call(dev->sensor, video, g_mbus_config, + &mbus_config); + if (ret < 0) { + unicam_dbg(3, dev, "g_mbus_config failed\n"); + goto err_pm_put; + } + + dev->active_data_lanes = + (mbus_config.flags & V4L2_MBUS_CSI2_LANE_MASK) >> + __ffs(V4L2_MBUS_CSI2_LANE_MASK); + if (!dev->active_data_lanes) + dev->active_data_lanes = dev->max_data_lanes; + } + if (dev->active_data_lanes > dev->max_data_lanes) { + unicam_err(dev, "Device has requested %u data lanes, which is >%u configured in DT\n", + dev->active_data_lanes, dev->max_data_lanes); + ret = -EINVAL; + goto err_pm_put; + } + + unicam_dbg(1, dev, "Running with %u data lanes\n", + dev->active_data_lanes); + + ret = clk_set_rate(dev->clock, 100 * 1000 * 1000); + if (ret) { + unicam_err(dev, "failed to set up clock\n"); + goto err_pm_put; + } + + ret = clk_prepare_enable(dev->clock); + if (ret) { + unicam_err(dev, "Failed to enable CSI clock: %d\n", ret); + goto err_pm_put; + } + dev->streaming = 1; + + unicam_start_rx(dev, addr); + + ret = v4l2_subdev_call(dev->sensor, video, s_stream, 1); + if (ret < 0) { + unicam_err(dev, "stream on failed in subdev\n"); + goto err_disable_unicam; + } + + return 0; + +err_disable_unicam: + unicam_disable(dev); + clk_disable_unprepare(dev->clock); +err_pm_put: + unicam_runtime_put(dev); +err_release_buffers: + list_for_each_entry_safe(buf, tmp, &dma_q->active, list) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + } + if (dev->cur_frm != dev->next_frm) + vb2_buffer_done(&dev->next_frm->vb.vb2_buf, + VB2_BUF_STATE_QUEUED); + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + dev->next_frm = NULL; + dev->cur_frm = NULL; + + return ret; +} + +static void unicam_stop_streaming(struct vb2_queue *vq) +{ + struct unicam_device *dev = vb2_get_drv_priv(vq); + struct unicam_dmaqueue *dma_q = &dev->dma_queue; + struct unicam_buffer *buf, *tmp; + unsigned long flags; + + if (v4l2_subdev_call(dev->sensor, video, s_stream, 0) < 0) + unicam_err(dev, "stream off failed in subdev\n"); + + unicam_disable(dev); + + /* Release all active buffers */ + spin_lock_irqsave(&dev->dma_queue_lock, flags); + list_for_each_entry_safe(buf, tmp, &dma_q->active, list) { + list_del(&buf->list); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + + if (dev->cur_frm == dev->next_frm) { + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } else { + vb2_buffer_done(&dev->cur_frm->vb.vb2_buf, VB2_BUF_STATE_ERROR); + vb2_buffer_done(&dev->next_frm->vb.vb2_buf, + VB2_BUF_STATE_ERROR); + } + dev->cur_frm = NULL; + dev->next_frm = NULL; + spin_unlock_irqrestore(&dev->dma_queue_lock, flags); + + clk_disable_unprepare(dev->clock); + unicam_runtime_put(dev); +} + +static int unicam_enum_input(struct file *file, void *priv, + struct v4l2_input *inp) +{ + struct unicam_device *dev = video_drvdata(file); + + if (inp->index != 0) + return -EINVAL; + + inp->type = V4L2_INPUT_TYPE_CAMERA; + if (v4l2_subdev_has_op(dev->sensor, video, s_dv_timings)) { + inp->capabilities = V4L2_IN_CAP_DV_TIMINGS; + inp->std = 0; + } else if (v4l2_subdev_has_op(dev->sensor, video, s_std)) { + inp->capabilities = V4L2_IN_CAP_STD; + if (v4l2_subdev_call(dev->sensor, video, g_tvnorms, &inp->std) + < 0) + inp->std = V4L2_STD_ALL; + } else { + inp->capabilities = 0; + inp->std = 0; + } + sprintf(inp->name, "Camera 0"); + return 0; +} + +static int unicam_g_input(struct file *file, void *priv, unsigned int *i) +{ + *i = 0; + + return 0; +} + +static int unicam_s_input(struct file *file, void *priv, unsigned int i) +{ + /* + * FIXME: Ideally we would like to be able to query the source + * subdevice for information over the input connectors it supports, + * and map that through in to a call to video_ops->s_routing. + * There is no infrastructure support for defining that within + * devicetree at present. Until that is implemented we can't + * map a user physical connector number to s_routing input number. + */ + if (i > 0) + return -EINVAL; + + return 0; +} + +static int unicam_querystd(struct file *file, void *priv, + v4l2_std_id *std) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, video, querystd, std); +} + +static int unicam_g_std(struct file *file, void *priv, v4l2_std_id *std) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, video, g_std, std); +} + +static int unicam_s_std(struct file *file, void *priv, v4l2_std_id std) +{ + struct unicam_device *dev = video_drvdata(file); + int ret; + v4l2_std_id current_std; + + ret = v4l2_subdev_call(dev->sensor, video, g_std, ¤t_std); + if (ret) + return ret; + + if (std == current_std) + return 0; + + if (vb2_is_busy(&dev->buffer_queue)) + return -EBUSY; + + ret = v4l2_subdev_call(dev->sensor, video, s_std, std); + + /* Force recomputation of bytesperline */ + dev->v_fmt.fmt.pix.bytesperline = 0; + + unicam_reset_format(dev); + + return ret; +} + +static int unicam_s_edid(struct file *file, void *priv, struct v4l2_edid *edid) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, pad, set_edid, edid); +} + +static int unicam_g_edid(struct file *file, void *priv, struct v4l2_edid *edid) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, pad, get_edid, edid); +} + +static int unicam_enum_framesizes(struct file *file, void *priv, + struct v4l2_frmsizeenum *fsize) +{ + struct unicam_device *dev = video_drvdata(file); + const struct unicam_fmt *fmt; + struct v4l2_subdev_frame_size_enum fse; + int ret; + + /* check for valid format */ + fmt = find_format_by_pix(dev, fsize->pixel_format); + if (!fmt) { + unicam_dbg(3, dev, "Invalid pixel code: %x\n", + fsize->pixel_format); + return -EINVAL; + } + + fse.index = fsize->index; + fse.pad = 0; + fse.code = fmt->code; + + ret = v4l2_subdev_call(dev->sensor, pad, enum_frame_size, NULL, &fse); + if (ret) + return ret; + + unicam_dbg(1, dev, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n", + __func__, fse.index, fse.code, fse.min_width, fse.max_width, + fse.min_height, fse.max_height); + + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = fse.max_width; + fsize->discrete.height = fse.max_height; + + return 0; +} + +static int unicam_enum_frameintervals(struct file *file, void *priv, + struct v4l2_frmivalenum *fival) +{ + struct unicam_device *dev = video_drvdata(file); + const struct unicam_fmt *fmt; + struct v4l2_subdev_frame_interval_enum fie = { + .index = fival->index, + .width = fival->width, + .height = fival->height, + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + int ret; + + fmt = find_format_by_pix(dev, fival->pixel_format); + if (!fmt) + return -EINVAL; + + fie.code = fmt->code; + ret = v4l2_subdev_call(dev->sensor, pad, enum_frame_interval, + NULL, &fie); + if (ret) + return ret; + + fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; + fival->discrete = fie.interval; + + return 0; +} + +static int unicam_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_g_parm_cap(video_devdata(file), dev->sensor, a); +} + +static int unicam_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_s_parm_cap(video_devdata(file), dev->sensor, a); +} + +static int unicam_g_dv_timings(struct file *file, void *priv, + struct v4l2_dv_timings *timings) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, video, g_dv_timings, timings); +} + +static int unicam_s_dv_timings(struct file *file, void *priv, + struct v4l2_dv_timings *timings) +{ + struct unicam_device *dev = video_drvdata(file); + struct v4l2_dv_timings current_timings; + int ret; + + ret = v4l2_subdev_call(dev->sensor, video, g_dv_timings, + ¤t_timings); + + if (v4l2_match_dv_timings(timings, ¤t_timings, 0, false)) + return 0; + + if (vb2_is_busy(&dev->buffer_queue)) + return -EBUSY; + + ret = v4l2_subdev_call(dev->sensor, video, s_dv_timings, timings); + + /* Force recomputation of bytesperline */ + dev->v_fmt.fmt.pix.bytesperline = 0; + + unicam_reset_format(dev); + + return ret; +} + +static int unicam_query_dv_timings(struct file *file, void *priv, + struct v4l2_dv_timings *timings) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, video, query_dv_timings, timings); +} + +static int unicam_enum_dv_timings(struct file *file, void *priv, + struct v4l2_enum_dv_timings *timings) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, pad, enum_dv_timings, timings); +} + +static int unicam_dv_timings_cap(struct file *file, void *priv, + struct v4l2_dv_timings_cap *cap) +{ + struct unicam_device *dev = video_drvdata(file); + + return v4l2_subdev_call(dev->sensor, pad, dv_timings_cap, cap); +} + +static int unicam_subscribe_event(struct v4l2_fh *fh, + const struct v4l2_event_subscription *sub) +{ + switch (sub->type) { + case V4L2_EVENT_SOURCE_CHANGE: + return v4l2_event_subscribe(fh, sub, 4, NULL); + } + + return v4l2_ctrl_subscribe_event(fh, sub); +} + +static int unicam_log_status(struct file *file, void *fh) +{ + struct unicam_device *dev = video_drvdata(file); + struct unicam_cfg *cfg = &dev->cfg; + u32 reg; + + /* status for sub devices */ + v4l2_device_call_all(&dev->v4l2_dev, 0, core, log_status); + + unicam_info(dev, "-----Receiver status-----\n"); + unicam_info(dev, "V4L2 width/height: %ux%u\n", + dev->v_fmt.fmt.pix.width, dev->v_fmt.fmt.pix.height); + unicam_info(dev, "Mediabus format: %08x\n", dev->fmt->code); + unicam_info(dev, "V4L2 format: %08x\n", + dev->v_fmt.fmt.pix.pixelformat); + reg = reg_read(&dev->cfg, UNICAM_IPIPE); + unicam_info(dev, "Unpacking/packing: %u / %u\n", + get_field(reg, UNICAM_PUM_MASK), + get_field(reg, UNICAM_PPM_MASK)); + unicam_info(dev, "----Live data----\n"); + unicam_info(dev, "Programmed stride: %4u\n", + reg_read(cfg, UNICAM_IBLS)); + unicam_info(dev, "Detected resolution: %ux%u\n", + reg_read(cfg, UNICAM_IHSTA), + reg_read(cfg, UNICAM_IVSTA)); + unicam_info(dev, "Write pointer: %08x\n", + reg_read(cfg, UNICAM_IBWP)); + + return 0; +} + +static void unicam_notify(struct v4l2_subdev *sd, + unsigned int notification, void *arg) +{ + struct unicam_device *dev = + container_of(sd->v4l2_dev, struct unicam_device, v4l2_dev); + + switch (notification) { + case V4L2_DEVICE_NOTIFY_EVENT: + v4l2_event_queue(&dev->video_dev, arg); + break; + default: + break; + } +} + +static const struct vb2_ops unicam_video_qops = { + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .queue_setup = unicam_queue_setup, + .buf_prepare = unicam_buffer_prepare, + .buf_queue = unicam_buffer_queue, + .start_streaming = unicam_start_streaming, + .stop_streaming = unicam_stop_streaming, +}; + +/* + * unicam_open : This function is based on the v4l2_fh_open helper function. + * It has been augmented to handle sensor subdevice power management, + */ +static int unicam_open(struct file *file) +{ + struct unicam_device *dev = video_drvdata(file); + int ret; + + mutex_lock(&dev->lock); + + ret = v4l2_fh_open(file); + if (ret) { + unicam_err(dev, "v4l2_fh_open failed\n"); + goto unlock; + } + + if (!v4l2_fh_is_singular_file(file)) + goto unlock; + + ret = v4l2_subdev_call(dev->sensor, core, s_power, 1); + if (ret < 0 && ret != -ENOIOCTLCMD) { + v4l2_fh_release(file); + goto unlock; + } + + ret = 0; + +unlock: + mutex_unlock(&dev->lock); + return ret; +} + +static int unicam_release(struct file *file) +{ + struct unicam_device *dev = video_drvdata(file); + struct v4l2_subdev *sd = dev->sensor; + bool fh_singular; + int ret; + + mutex_lock(&dev->lock); + + fh_singular = v4l2_fh_is_singular_file(file); + + ret = _vb2_fop_release(file, NULL); + + if (fh_singular) + v4l2_subdev_call(sd, core, s_power, 0); + + mutex_unlock(&dev->lock); + + return ret; +} + +/* unicam capture driver file operations */ +static const struct v4l2_file_operations unicam_fops = { + .owner = THIS_MODULE, + .open = unicam_open, + .release = unicam_release, + .read = vb2_fop_read, + .poll = vb2_fop_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = vb2_fop_mmap, +}; + +/* unicam capture ioctl operations */ +static const struct v4l2_ioctl_ops unicam_ioctl_ops = { + .vidioc_querycap = unicam_querycap, + .vidioc_enum_fmt_vid_cap = unicam_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = unicam_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = unicam_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = unicam_try_fmt_vid_cap, + + .vidioc_enum_input = unicam_enum_input, + .vidioc_g_input = unicam_g_input, + .vidioc_s_input = unicam_s_input, + + .vidioc_querystd = unicam_querystd, + .vidioc_s_std = unicam_s_std, + .vidioc_g_std = unicam_g_std, + + .vidioc_g_edid = unicam_g_edid, + .vidioc_s_edid = unicam_s_edid, + + .vidioc_enum_framesizes = unicam_enum_framesizes, + .vidioc_enum_frameintervals = unicam_enum_frameintervals, + + .vidioc_g_parm = unicam_g_parm, + .vidioc_s_parm = unicam_s_parm, + + .vidioc_s_dv_timings = unicam_s_dv_timings, + .vidioc_g_dv_timings = unicam_g_dv_timings, + .vidioc_query_dv_timings = unicam_query_dv_timings, + .vidioc_enum_dv_timings = unicam_enum_dv_timings, + .vidioc_dv_timings_cap = unicam_dv_timings_cap, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + + .vidioc_log_status = unicam_log_status, + .vidioc_subscribe_event = unicam_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static int +unicam_async_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct unicam_device *unicam = container_of(notifier->v4l2_dev, + struct unicam_device, v4l2_dev); + + if (unicam->sensor) { + unicam_info(unicam, "Rejecting subdev %s (Already set!!)", + subdev->name); + return 0; + } + + unicam->sensor = subdev; + unicam_dbg(1, unicam, "Using sensor %s for capture\n", subdev->name); + + return 0; +} + +static int unicam_probe_complete(struct unicam_device *unicam) +{ + struct video_device *vdev; + struct vb2_queue *q; + struct v4l2_mbus_framefmt mbus_fmt = {0}; + const struct unicam_fmt *fmt; + int ret; + + v4l2_set_subdev_hostdata(unicam->sensor, unicam); + + unicam->v4l2_dev.notify = unicam_notify; + + unicam->sensor_config = v4l2_subdev_alloc_pad_config(unicam->sensor); + if (!unicam->sensor_config) + return -ENOMEM; + + ret = __subdev_get_format(unicam, &mbus_fmt); + if (ret) { + unicam_err(unicam, "Failed to get_format - ret %d\n", ret); + return ret; + } + + fmt = find_format_by_code(mbus_fmt.code); + if (!fmt) { + /* Find the first format that the sensor and unicam both + * support + */ + fmt = get_first_supported_format(unicam); + + if (!fmt) + /* No compatible formats */ + return -EINVAL; + + mbus_fmt.code = fmt->code; + ret = __subdev_set_format(unicam, &mbus_fmt); + if (ret) + return -EINVAL; + } + if (mbus_fmt.field != V4L2_FIELD_NONE) { + /* Interlaced not supported - disable it now. */ + mbus_fmt.field = V4L2_FIELD_NONE; + ret = __subdev_set_format(unicam, &mbus_fmt); + if (ret) + return -EINVAL; + } + + unicam->fmt = fmt; + if (fmt->fourcc) + unicam->v_fmt.fmt.pix.pixelformat = fmt->fourcc; + else + unicam->v_fmt.fmt.pix.pixelformat = fmt->repacked_fourcc; + + /* Read current subdev format */ + unicam_reset_format(unicam); + + if (v4l2_subdev_has_op(unicam->sensor, video, s_std)) { + v4l2_std_id tvnorms; + + if (WARN_ON(!v4l2_subdev_has_op(unicam->sensor, video, + g_tvnorms))) + /* + * Subdevice should not advertise s_std but not + * g_tvnorms + */ + return -EINVAL; + + ret = v4l2_subdev_call(unicam->sensor, video, + g_tvnorms, &tvnorms); + if (WARN_ON(ret)) + return -EINVAL; + unicam->video_dev.tvnorms |= tvnorms; + } + + spin_lock_init(&unicam->dma_queue_lock); + mutex_init(&unicam->lock); + + /* Add controls from the subdevice */ + ret = v4l2_ctrl_add_handler(&unicam->ctrl_handler, + unicam->sensor->ctrl_handler, NULL, true); + if (ret < 0) + return ret; + + q = &unicam->buffer_queue; + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; + q->drv_priv = unicam; + q->ops = &unicam_video_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->buf_struct_size = sizeof(struct unicam_buffer); + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->lock = &unicam->lock; + q->min_buffers_needed = 2; + q->dev = &unicam->pdev->dev; + + ret = vb2_queue_init(q); + if (ret) { + unicam_err(unicam, "vb2_queue_init() failed\n"); + return ret; + } + + INIT_LIST_HEAD(&unicam->dma_queue.active); + + vdev = &unicam->video_dev; + strlcpy(vdev->name, UNICAM_MODULE_NAME, sizeof(vdev->name)); + vdev->release = video_device_release_empty; + vdev->fops = &unicam_fops; + vdev->ioctl_ops = &unicam_ioctl_ops; + vdev->v4l2_dev = &unicam->v4l2_dev; + vdev->vfl_dir = VFL_DIR_RX; + vdev->queue = q; + vdev->lock = &unicam->lock; + vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | + V4L2_CAP_READWRITE; + + /* If the source has no controls then remove our ctrl handler. */ + if (list_empty(&unicam->ctrl_handler.ctrls)) + unicam->v4l2_dev.ctrl_handler = NULL; + + video_set_drvdata(vdev, unicam); + vdev->entity.flags |= MEDIA_ENT_FL_DEFAULT; + + if (!v4l2_subdev_has_op(unicam->sensor, video, s_std)) { + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_S_STD); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_G_STD); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_ENUMSTD); + } + if (!v4l2_subdev_has_op(unicam->sensor, video, querystd)) + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_QUERYSTD); + if (!v4l2_subdev_has_op(unicam->sensor, video, s_dv_timings)) { + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_S_EDID); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_G_EDID); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_DV_TIMINGS_CAP); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_G_DV_TIMINGS); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_S_DV_TIMINGS); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_ENUM_DV_TIMINGS); + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_QUERY_DV_TIMINGS); + } + if (!v4l2_subdev_has_op(unicam->sensor, pad, enum_frame_interval)) + v4l2_disable_ioctl(&unicam->video_dev, + VIDIOC_ENUM_FRAMEINTERVALS); + if (!v4l2_subdev_has_op(unicam->sensor, video, g_frame_interval)) + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_G_PARM); + if (!v4l2_subdev_has_op(unicam->sensor, video, s_frame_interval)) + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_S_PARM); + + if (!v4l2_subdev_has_op(unicam->sensor, pad, enum_frame_size)) + v4l2_disable_ioctl(&unicam->video_dev, VIDIOC_ENUM_FRAMESIZES); + + ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); + if (ret) { + unicam_err(unicam, "Unable to register video device.\n"); + return ret; + } + + ret = v4l2_device_register_ro_subdev_nodes(&unicam->v4l2_dev); + if (ret) { + unicam_err(unicam, + "Unable to register subdev nodes.\n"); + video_unregister_device(&unicam->video_dev); + return ret; + } + + ret = media_create_pad_link(&unicam->sensor->entity, 0, + &unicam->video_dev.entity, 0, + MEDIA_LNK_FL_ENABLED | + MEDIA_LNK_FL_IMMUTABLE); + if (ret) { + unicam_err(unicam, "Unable to create pad links.\n"); + video_unregister_device(&unicam->video_dev); + return ret; + } + + return 0; +} + +static int unicam_async_complete(struct v4l2_async_notifier *notifier) +{ + struct unicam_device *unicam = container_of(notifier->v4l2_dev, + struct unicam_device, v4l2_dev); + + return unicam_probe_complete(unicam); +} + +static const struct v4l2_async_notifier_operations unicam_async_ops = { + .bound = unicam_async_bound, + .complete = unicam_async_complete, +}; + +static int of_unicam_connect_subdevs(struct unicam_device *dev) +{ + struct platform_device *pdev = dev->pdev; + struct device_node *parent, *ep_node = NULL, *remote_ep = NULL, + *sensor_node = NULL; + struct v4l2_fwnode_endpoint *ep; + struct v4l2_async_subdev *asd; + unsigned int peripheral_data_lanes; + int ret = -EINVAL; + unsigned int lane; + + parent = pdev->dev.of_node; + + asd = &dev->asd; + ep = &dev->endpoint; + + ep_node = of_graph_get_next_endpoint(parent, NULL); + if (!ep_node) { + unicam_dbg(3, dev, "can't get next endpoint\n"); + goto cleanup_exit; + } + + unicam_dbg(3, dev, "ep_node is %s\n", ep_node->name); + + v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep_node), ep); + + for (lane = 0; lane < ep->bus.mipi_csi2.num_data_lanes; lane++) { + if (ep->bus.mipi_csi2.data_lanes[lane] != lane + 1) { + unicam_err(dev, "Local endpoint - data lane reordering not supported\n"); + goto cleanup_exit; + } + } + + peripheral_data_lanes = ep->bus.mipi_csi2.num_data_lanes; + + sensor_node = of_graph_get_remote_port_parent(ep_node); + if (!sensor_node) { + unicam_dbg(3, dev, "can't get remote parent\n"); + goto cleanup_exit; + } + unicam_dbg(3, dev, "sensor_node is %s\n", sensor_node->name); + asd->match_type = V4L2_ASYNC_MATCH_FWNODE; + asd->match.fwnode = of_fwnode_handle(sensor_node); + + remote_ep = of_graph_get_remote_endpoint(ep_node); + if (!remote_ep) { + unicam_dbg(3, dev, "can't get remote-endpoint\n"); + goto cleanup_exit; + } + unicam_dbg(3, dev, "remote_ep is %s\n", remote_ep->name); + v4l2_fwnode_endpoint_parse(of_fwnode_handle(remote_ep), ep); + unicam_dbg(3, dev, "parsed remote_ep to endpoint. nr_of_link_frequencies %u, bus_type %u\n", + ep->nr_of_link_frequencies, ep->bus_type); + + switch (ep->bus_type) { + case V4L2_MBUS_CSI2_DPHY: + if (ep->bus.mipi_csi2.num_data_lanes > + peripheral_data_lanes) { + unicam_err(dev, "Subdevice %s wants too many data lanes (%u > %u)\n", + sensor_node->name, + ep->bus.mipi_csi2.num_data_lanes, + peripheral_data_lanes); + goto cleanup_exit; + } + for (lane = 0; + lane < ep->bus.mipi_csi2.num_data_lanes; + lane++) { + if (ep->bus.mipi_csi2.data_lanes[lane] != lane + 1) { + unicam_err(dev, "Subdevice %s - incompatible data lane config\n", + sensor_node->name); + goto cleanup_exit; + } + } + dev->max_data_lanes = ep->bus.mipi_csi2.num_data_lanes; + dev->bus_flags = ep->bus.mipi_csi2.flags; + break; + case V4L2_MBUS_CCP2: + if (ep->bus.mipi_csi1.clock_lane != 0 || + ep->bus.mipi_csi1.data_lane != 1) { + unicam_err(dev, "Subdevice %s incompatible lane config\n", + sensor_node->name); + goto cleanup_exit; + } + dev->max_data_lanes = 1; + dev->bus_flags = ep->bus.mipi_csi1.strobe; + break; + default: + /* Unsupported bus type */ + unicam_err(dev, "sub-device %s is not a CSI2 or CCP2 device %d\n", + sensor_node->name, ep->bus_type); + goto cleanup_exit; + } + + /* Store bus type - CSI2 or CCP2 */ + dev->bus_type = ep->bus_type; + unicam_dbg(3, dev, "bus_type is %d\n", dev->bus_type); + + /* Store Virtual Channel number */ + dev->virtual_channel = ep->base.id; + + unicam_dbg(3, dev, "v4l2-endpoint: %s\n", + dev->bus_type == V4L2_MBUS_CSI2_DPHY ? "CSI2" : "CCP2"); + unicam_dbg(3, dev, "Virtual Channel=%d\n", dev->virtual_channel); + if (dev->bus_type == V4L2_MBUS_CSI2_DPHY) + unicam_dbg(3, dev, "flags=0x%08x\n", ep->bus.mipi_csi2.flags); + unicam_dbg(3, dev, "num_data_lanes=%d\n", dev->max_data_lanes); + + unicam_dbg(1, dev, "found sub-device %s\n", sensor_node->name); + + v4l2_async_notifier_init(&dev->notifier); + + ret = v4l2_async_notifier_add_subdev(&dev->notifier, asd); + if (ret) { + unicam_err(dev, "Error adding subdevice - ret %d\n", ret); + goto cleanup_exit; + } + + dev->notifier.ops = &unicam_async_ops; + ret = v4l2_async_notifier_register(&dev->v4l2_dev, + &dev->notifier); + if (ret) { + unicam_err(dev, "Error registering async notifier - ret %d\n", + ret); + ret = -EINVAL; + } + +cleanup_exit: + if (remote_ep) + of_node_put(remote_ep); + if (sensor_node) + of_node_put(sensor_node); + if (ep_node) + of_node_put(ep_node); + + return ret; +} + +static int unicam_probe(struct platform_device *pdev) +{ + struct unicam_cfg *unicam_cfg; + struct unicam_device *unicam; + struct v4l2_ctrl_handler *hdl; + struct resource *res; + int ret; + + unicam = devm_kzalloc(&pdev->dev, sizeof(*unicam), GFP_KERNEL); + if (!unicam) + return -ENOMEM; + + unicam->pdev = pdev; + unicam_cfg = &unicam->cfg; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + unicam_cfg->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(unicam_cfg->base)) { + unicam_err(unicam, "Failed to get main io block\n"); + return PTR_ERR(unicam_cfg->base); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + unicam_cfg->clk_gate_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(unicam_cfg->clk_gate_base)) { + unicam_err(unicam, "Failed to get 2nd io block\n"); + return PTR_ERR(unicam_cfg->clk_gate_base); + } + + unicam->clock = devm_clk_get(&pdev->dev, "lp"); + if (IS_ERR(unicam->clock)) { + unicam_err(unicam, "Failed to get clock\n"); + return PTR_ERR(unicam->clock); + } + + ret = platform_get_irq(pdev, 0); + if (ret <= 0) { + dev_err(&pdev->dev, "No IRQ resource\n"); + return -ENODEV; + } + + ret = devm_request_irq(&pdev->dev, ret, unicam_isr, 0, + "unicam_capture0", unicam); + if (ret) { + dev_err(&pdev->dev, "Unable to request interrupt\n"); + return -EINVAL; + } + + unicam->mdev.dev = &pdev->dev; + strscpy(unicam->mdev.model, UNICAM_MODULE_NAME, + sizeof(unicam->mdev.model)); + strscpy(unicam->mdev.serial, "", sizeof(unicam->mdev.serial)); + snprintf(unicam->mdev.bus_info, sizeof(unicam->mdev.bus_info), + "platform:%s %s", + pdev->dev.driver->name, dev_name(&pdev->dev)); + unicam->mdev.hw_revision = 1; + + media_entity_pads_init(&unicam->video_dev.entity, 1, &unicam->pad); + media_device_init(&unicam->mdev); + + unicam->v4l2_dev.mdev = &unicam->mdev; + + ret = v4l2_device_register(&pdev->dev, &unicam->v4l2_dev); + if (ret) { + unicam_err(unicam, + "Unable to register v4l2 device.\n"); + goto media_cleanup; + } + + ret = media_device_register(&unicam->mdev); + if (ret < 0) { + unicam_err(unicam, + "Unable to register media-controller device.\n"); + goto probe_out_v4l2_unregister; + } + + /* Reserve space for the controls */ + hdl = &unicam->ctrl_handler; + ret = v4l2_ctrl_handler_init(hdl, 16); + if (ret < 0) + goto media_unregister; + unicam->v4l2_dev.ctrl_handler = hdl; + + /* set the driver data in platform device */ + platform_set_drvdata(pdev, unicam); + + ret = of_unicam_connect_subdevs(unicam); + if (ret) { + dev_err(&pdev->dev, "Failed to connect subdevs\n"); + goto free_hdl; + } + + /* Enable the block power domain */ + pm_runtime_enable(&pdev->dev); + + return 0; + +free_hdl: + v4l2_ctrl_handler_free(hdl); +media_unregister: + media_device_unregister(&unicam->mdev); +probe_out_v4l2_unregister: + v4l2_device_unregister(&unicam->v4l2_dev); +media_cleanup: + media_device_cleanup(&unicam->mdev); + + return ret; +} + +static int unicam_remove(struct platform_device *pdev) +{ + struct unicam_device *unicam = platform_get_drvdata(pdev); + + unicam_dbg(2, unicam, "%s\n", __func__); + + pm_runtime_disable(&pdev->dev); + + v4l2_async_notifier_unregister(&unicam->notifier); + v4l2_ctrl_handler_free(&unicam->ctrl_handler); + v4l2_device_unregister(&unicam->v4l2_dev); + video_unregister_device(&unicam->video_dev); + if (unicam->sensor_config) + v4l2_subdev_free_pad_config(unicam->sensor_config); + media_device_unregister(&unicam->mdev); + media_device_cleanup(&unicam->mdev); + + return 0; +} + +static const struct of_device_id unicam_of_match[] = { + { .compatible = "brcm,bcm2835-unicam", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, unicam_of_match); + +static struct platform_driver unicam_driver = { + .probe = unicam_probe, + .remove = unicam_remove, + .driver = { + .name = UNICAM_MODULE_NAME, + .of_match_table = of_match_ptr(unicam_of_match), + }, +}; + +module_platform_driver(unicam_driver); + +MODULE_AUTHOR("Dave Stevenson "); +MODULE_DESCRIPTION("BCM2835 Unicam driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(UNICAM_VERSION); --- /dev/null +++ b/drivers/media/platform/bcm2835/vc4-regs-unicam.h @@ -0,0 +1,253 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * Copyright (C) 2017-2020 Raspberry Pi Trading. + * Dave Stevenson + */ + +#ifndef VC4_REGS_UNICAM_H +#define VC4_REGS_UNICAM_H + +/* + * The following values are taken from files found within the code drop + * made by Broadcom for the BCM21553 Graphics Driver, predominantly in + * brcm_usrlib/dag/vmcsx/vcinclude/hardware_vc4.h. + * They have been modified to be only the register offset. + */ +#define UNICAM_CTRL 0x000 +#define UNICAM_STA 0x004 +#define UNICAM_ANA 0x008 +#define UNICAM_PRI 0x00c +#define UNICAM_CLK 0x010 +#define UNICAM_CLT 0x014 +#define UNICAM_DAT0 0x018 +#define UNICAM_DAT1 0x01c +#define UNICAM_DAT2 0x020 +#define UNICAM_DAT3 0x024 +#define UNICAM_DLT 0x028 +#define UNICAM_CMP0 0x02c +#define UNICAM_CMP1 0x030 +#define UNICAM_CAP0 0x034 +#define UNICAM_CAP1 0x038 +#define UNICAM_ICTL 0x100 +#define UNICAM_ISTA 0x104 +#define UNICAM_IDI0 0x108 +#define UNICAM_IPIPE 0x10c +#define UNICAM_IBSA0 0x110 +#define UNICAM_IBEA0 0x114 +#define UNICAM_IBLS 0x118 +#define UNICAM_IBWP 0x11c +#define UNICAM_IHWIN 0x120 +#define UNICAM_IHSTA 0x124 +#define UNICAM_IVWIN 0x128 +#define UNICAM_IVSTA 0x12c +#define UNICAM_ICC 0x130 +#define UNICAM_ICS 0x134 +#define UNICAM_IDC 0x138 +#define UNICAM_IDPO 0x13c +#define UNICAM_IDCA 0x140 +#define UNICAM_IDCD 0x144 +#define UNICAM_IDS 0x148 +#define UNICAM_DCS 0x200 +#define UNICAM_DBSA0 0x204 +#define UNICAM_DBEA0 0x208 +#define UNICAM_DBWP 0x20c +#define UNICAM_DBCTL 0x300 +#define UNICAM_IBSA1 0x304 +#define UNICAM_IBEA1 0x308 +#define UNICAM_IDI1 0x30c +#define UNICAM_DBSA1 0x310 +#define UNICAM_DBEA1 0x314 +#define UNICAM_MISC 0x400 + +/* + * The following bitmasks are from the kernel released by Broadcom + * for Android - https://android.googlesource.com/kernel/bcm/ + * The Rhea, Hawaii, and Java chips all contain the same VideoCore4 + * Unicam block as BCM2835, as defined in eg + * arch/arm/mach-rhea/include/mach/rdb_A0/brcm_rdb_cam.h and similar. + * Values reworked to use the kernel BIT and GENMASK macros. + * + * Some of the bit mnenomics have been amended to match the datasheet. + */ +/* UNICAM_CTRL Register */ +#define UNICAM_CPE BIT(0) +#define UNICAM_MEM BIT(1) +#define UNICAM_CPR BIT(2) +#define UNICAM_CPM_MASK GENMASK(3, 3) +#define UNICAM_CPM_CSI2 0 +#define UNICAM_CPM_CCP2 1 +#define UNICAM_SOE BIT(4) +#define UNICAM_DCM_MASK GENMASK(5, 5) +#define UNICAM_DCM_STROBE 0 +#define UNICAM_DCM_DATA 1 +#define UNICAM_SLS BIT(6) +#define UNICAM_PFT_MASK GENMASK(11, 8) +#define UNICAM_OET_MASK GENMASK(20, 12) + +/* UNICAM_STA Register */ +#define UNICAM_SYN BIT(0) +#define UNICAM_CS BIT(1) +#define UNICAM_SBE BIT(2) +#define UNICAM_PBE BIT(3) +#define UNICAM_HOE BIT(4) +#define UNICAM_PLE BIT(5) +#define UNICAM_SSC BIT(6) +#define UNICAM_CRCE BIT(7) +#define UNICAM_OES BIT(8) +#define UNICAM_IFO BIT(9) +#define UNICAM_OFO BIT(10) +#define UNICAM_BFO BIT(11) +#define UNICAM_DL BIT(12) +#define UNICAM_PS BIT(13) +#define UNICAM_IS BIT(14) +#define UNICAM_PI0 BIT(15) +#define UNICAM_PI1 BIT(16) +#define UNICAM_FSI_S BIT(17) +#define UNICAM_FEI_S BIT(18) +#define UNICAM_LCI_S BIT(19) +#define UNICAM_BUF0_RDY BIT(20) +#define UNICAM_BUF0_NO BIT(21) +#define UNICAM_BUF1_RDY BIT(22) +#define UNICAM_BUF1_NO BIT(23) +#define UNICAM_DI BIT(24) + +#define UNICAM_STA_MASK_ALL \ + (UNICAM_DL + \ + UNICAM_SBE + \ + UNICAM_PBE + \ + UNICAM_HOE + \ + UNICAM_PLE + \ + UNICAM_SSC + \ + UNICAM_CRCE + \ + UNICAM_IFO + \ + UNICAM_OFO + \ + UNICAM_PS + \ + UNICAM_PI0 + \ + UNICAM_PI1) + +/* UNICAM_ANA Register */ +#define UNICAM_APD BIT(0) +#define UNICAM_BPD BIT(1) +#define UNICAM_AR BIT(2) +#define UNICAM_DDL BIT(3) +#define UNICAM_CTATADJ_MASK GENMASK(7, 4) +#define UNICAM_PTATADJ_MASK GENMASK(11, 8) + +/* UNICAM_PRI Register */ +#define UNICAM_PE BIT(0) +#define UNICAM_PT_MASK GENMASK(2, 1) +#define UNICAM_NP_MASK GENMASK(7, 4) +#define UNICAM_PP_MASK GENMASK(11, 8) +#define UNICAM_BS_MASK GENMASK(15, 12) +#define UNICAM_BL_MASK GENMASK(17, 16) + +/* UNICAM_CLK Register */ +#define UNICAM_CLE BIT(0) +#define UNICAM_CLPD BIT(1) +#define UNICAM_CLLPE BIT(2) +#define UNICAM_CLHSE BIT(3) +#define UNICAM_CLTRE BIT(4) +#define UNICAM_CLAC_MASK GENMASK(8, 5) +#define UNICAM_CLSTE BIT(29) + +/* UNICAM_CLT Register */ +#define UNICAM_CLT1_MASK GENMASK(7, 0) +#define UNICAM_CLT2_MASK GENMASK(15, 8) + +/* UNICAM_DATn Registers */ +#define UNICAM_DLE BIT(0) +#define UNICAM_DLPD BIT(1) +#define UNICAM_DLLPE BIT(2) +#define UNICAM_DLHSE BIT(3) +#define UNICAM_DLTRE BIT(4) +#define UNICAM_DLSM BIT(5) +#define UNICAM_DLFO BIT(28) +#define UNICAM_DLSTE BIT(29) + +#define UNICAM_DAT_MASK_ALL (UNICAM_DLSTE + UNICAM_DLFO) + +/* UNICAM_DLT Register */ +#define UNICAM_DLT1_MASK GENMASK(7, 0) +#define UNICAM_DLT2_MASK GENMASK(15, 8) +#define UNICAM_DLT3_MASK GENMASK(23, 16) + +/* UNICAM_ICTL Register */ +#define UNICAM_FSIE BIT(0) +#define UNICAM_FEIE BIT(1) +#define UNICAM_IBOB BIT(2) +#define UNICAM_FCM BIT(3) +#define UNICAM_TFC BIT(4) +#define UNICAM_LIP_MASK GENMASK(6, 5) +#define UNICAM_LCIE_MASK GENMASK(28, 16) + +/* UNICAM_IDI0/1 Register */ +#define UNICAM_ID0_MASK GENMASK(7, 0) +#define UNICAM_ID1_MASK GENMASK(15, 8) +#define UNICAM_ID2_MASK GENMASK(23, 16) +#define UNICAM_ID3_MASK GENMASK(31, 24) + +/* UNICAM_ISTA Register */ +#define UNICAM_FSI BIT(0) +#define UNICAM_FEI BIT(1) +#define UNICAM_LCI BIT(2) + +#define UNICAM_ISTA_MASK_ALL (UNICAM_FSI + UNICAM_FEI + UNICAM_LCI) + +/* UNICAM_IPIPE Register */ +#define UNICAM_PUM_MASK GENMASK(2, 0) + /* Unpacking modes */ + #define UNICAM_PUM_NONE 0 + #define UNICAM_PUM_UNPACK6 1 + #define UNICAM_PUM_UNPACK7 2 + #define UNICAM_PUM_UNPACK8 3 + #define UNICAM_PUM_UNPACK10 4 + #define UNICAM_PUM_UNPACK12 5 + #define UNICAM_PUM_UNPACK14 6 + #define UNICAM_PUM_UNPACK16 7 +#define UNICAM_DDM_MASK GENMASK(6, 3) +#define UNICAM_PPM_MASK GENMASK(9, 7) + /* Packing modes */ + #define UNICAM_PPM_NONE 0 + #define UNICAM_PPM_PACK8 1 + #define UNICAM_PPM_PACK10 2 + #define UNICAM_PPM_PACK12 3 + #define UNICAM_PPM_PACK14 4 + #define UNICAM_PPM_PACK16 5 +#define UNICAM_DEM_MASK GENMASK(11, 10) +#define UNICAM_DEBL_MASK GENMASK(14, 12) +#define UNICAM_ICM_MASK GENMASK(16, 15) +#define UNICAM_IDM_MASK GENMASK(17, 17) + +/* UNICAM_ICC Register */ +#define UNICAM_ICFL_MASK GENMASK(4, 0) +#define UNICAM_ICFH_MASK GENMASK(9, 5) +#define UNICAM_ICST_MASK GENMASK(12, 10) +#define UNICAM_ICLT_MASK GENMASK(15, 13) +#define UNICAM_ICLL_MASK GENMASK(31, 16) + +/* UNICAM_DCS Register */ +#define UNICAM_DIE BIT(0) +#define UNICAM_DIM BIT(1) +#define UNICAM_DBOB BIT(3) +#define UNICAM_FDE BIT(4) +#define UNICAM_LDP BIT(5) +#define UNICAM_EDL_MASK GENMASK(15, 8) + +/* UNICAM_DBCTL Register */ +#define UNICAM_DBEN BIT(0) +#define UNICAM_BUF0_IE BIT(1) +#define UNICAM_BUF1_IE BIT(2) + +/* UNICAM_CMP[0,1] register */ +#define UNICAM_PCE BIT(31) +#define UNICAM_GI BIT(9) +#define UNICAM_CPH BIT(8) +#define UNICAM_PCVC_MASK GENMASK(7, 6) +#define UNICAM_PCDT_MASK GENMASK(5, 0) + +/* UNICAM_MISC register */ +#define UNICAM_FL0 BIT(6) +#define UNICAM_FL1 BIT(9) + +#endif