--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * BCM2835 Unicam Capture Driver
+ *
+ * Copyright (C) 2017-2020 - Raspberry Pi (Trading) Ltd.
+ *
+ * Dave Stevenson <dave.stevenson@raspberrypi.com>
+ *
+ * Based on TI am437x driver by
+ * Benoit Parrot <bparrot@ti.com>
+ * Lad, Prabhakar <prabhakar.csengg@gmail.com>
+ *
+ * and TI CAL camera interface driver by
+ * Benoit Parrot <bparrot@ti.com>
+ *
+ *
+ * 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 <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dv-timings.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fwnode.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <media/v4l2-async.h>
+
+#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
+/* Default size of the embedded buffer */
+#define UNICAM_EMBEDDED_SIZE 8192
+
+/*
+ * Size of the dummy buffer. Can be any size really, but the DMA
+ * allocation works in units of page sizes.
+ */
+#define DUMMY_BUF_SIZE (PAGE_SIZE)
+
+enum pad_types {
+ IMAGE_PAD,
+ METADATA_PAD,
+ MAX_NODES
+};
+
+/*
+ * 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,
+ },
+ /* Embedded data format */
+ {
+ .fourcc = V4L2_META_FMT_SENSOR_DATA,
+ .code = MEDIA_BUS_FMT_SENSOR_DATA,
+ .depth = 8,
+ }
+};
+
+struct unicam_buffer {
+ struct vb2_v4l2_buffer vb;
+ struct list_head list;
+};
+
+static inline struct unicam_buffer *to_unicam_buffer(struct vb2_buffer *vb)
+{
+ return container_of(vb, struct unicam_buffer, vb.vb2_buf);
+}
+
+struct unicam_node {
+ bool registered;
+ int open;
+ bool streaming;
+ unsigned int pad_id;
+ /* 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;
+ /* Buffer queue used in video-buf */
+ struct vb2_queue buffer_queue;
+ /* Queue of filled frames */
+ struct list_head dma_queue;
+ /* IRQ lock for DMA queue */
+ spinlock_t dma_queue_lock;
+ /* lock used to access this structure */
+ struct mutex lock;
+ /* Identifies video device for this channel */
+ struct video_device video_dev;
+ /* Pointer to the parent handle */
+ struct unicam_device *dev;
+ struct media_pad pad;
+ unsigned int embedded_lines;
+ /*
+ * Dummy buffer intended to be used by unicam
+ * if we have no other queued buffers to swap to.
+ */
+ void *dummy_buf_cpu_addr;
+ dma_addr_t dummy_buf_dma_addr;
+};
+
+struct unicam_device {
+ struct kref kref;
+
+ /* V4l2 specific parameters */
+ struct v4l2_async_subdev asd;
+
+ /* peripheral base address */
+ void __iomem *base;
+ /* clock gating base address */
+ void __iomem *clk_gate_base;
+ /* clock handle */
+ struct clk *clock;
+ /* V4l2 device */
+ struct v4l2_device v4l2_dev;
+ struct media_device mdev;
+
+ /* 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;
+
+ 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;
+ bool sensor_embedded_data;
+
+ struct unicam_node node[MAX_NODES];
+ struct v4l2_ctrl_handler ctrl_handler;
+};
+
+static inline struct unicam_device *
+to_unicam_device(struct v4l2_device *v4l2_dev)
+{
+ return container_of(v4l2_dev, struct unicam_device, v4l2_dev);
+}
+
+/* Hardware access */
+static inline void clk_write(struct unicam_device *dev, u32 val)
+{
+ writel(val | 0x5a000000, dev->clk_gate_base);
+}
+
+static inline u32 reg_read(struct unicam_device *dev, u32 offset)
+{
+ return readl(dev->base + offset);
+}
+
+static inline void reg_write(struct unicam_device *dev, u32 offset, u32 val)
+{
+ writel(val, dev->base + offset);
+}
+
+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 u32 reg_read_field(struct unicam_device *dev, u32 offset,
+ u32 mask)
+{
+ return get_field(reg_read(dev, offset), mask);
+}
+
+static inline void reg_write_field(struct unicam_device *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)
+{
+ unsigned int i;
+ int ret = 0;
+
+ for (i = 0; !ret && i < MAX_ENUM_MBUS_CODE; i++) {
+ struct v4l2_subdev_mbus_code_enum mbus_code = {
+ .index = i,
+ .pad = IMAGE_PAD,
+ .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, int pad_id)
+{
+ struct v4l2_subdev_format sd_fmt = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ .pad = pad_id
+ };
+ 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, int pad_id)
+{
+ struct v4l2_subdev_format sd_fmt = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ .pad = pad_id
+ };
+ 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;
+
+ *fmt = sd_fmt.format;
+
+ if (pad_id == IMAGE_PAD)
+ unicam_dbg(1, dev, "%s %dx%d code:%04x\n", __func__, fmt->width,
+ fmt->height, fmt->code);
+ else
+ unicam_dbg(1, dev, "%s Embedded data code:%04x\n", __func__,
+ sd_fmt.format.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_node *node)
+{
+ struct unicam_device *dev = node->dev;
+ struct v4l2_mbus_framefmt mbus_fmt;
+ int ret;
+
+ if (dev->sensor_embedded_data || node->pad_id != METADATA_PAD) {
+ ret = __subdev_get_format(dev, &mbus_fmt, node->pad_id);
+ if (ret) {
+ unicam_err(dev, "Failed to get_format - ret %d\n", ret);
+ return ret;
+ }
+
+ if (mbus_fmt.code != node->fmt->code) {
+ unicam_err(dev, "code mismatch - fmt->code %08x, mbus_fmt.code %08x\n",
+ node->fmt->code, mbus_fmt.code);
+ return ret;
+ }
+ }
+
+ if (node->pad_id == IMAGE_PAD) {
+ v4l2_fill_pix_format(&node->v_fmt.fmt.pix, &mbus_fmt);
+ node->v_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ unicam_calc_format_size_bpl(dev, node->fmt, &node->v_fmt);
+ } else {
+ node->v_fmt.type = V4L2_BUF_TYPE_META_CAPTURE;
+ node->v_fmt.fmt.meta.dataformat = V4L2_META_FMT_SENSOR_DATA;
+ if (dev->sensor_embedded_data) {
+ node->v_fmt.fmt.meta.buffersize =
+ mbus_fmt.width * mbus_fmt.height;
+ node->embedded_lines = mbus_fmt.height;
+ } else {
+ node->v_fmt.fmt.meta.buffersize = UNICAM_EMBEDDED_SIZE;
+ node->embedded_lines = 1;
+ }
+ }
+
+ node->m_fmt = mbus_fmt;
+ return 0;
+}
+
+static void unicam_wr_dma_addr(struct unicam_device *dev, dma_addr_t dmaaddr,
+ unsigned int buffer_size, int pad_id)
+{
+ dma_addr_t endaddr = dmaaddr + buffer_size;
+
+ /*
+ * dmaaddr and endaddr should be a 32-bit address with the top two bits
+ * set to 0x3 to signify uncached access through the Videocore memory
+ * controller.
+ */
+ WARN_ON((dmaaddr >> 30) != 0x3 || (endaddr >> 30) != 0x3);
+
+ if (pad_id == IMAGE_PAD) {
+ reg_write(dev, UNICAM_IBSA0, dmaaddr);
+ reg_write(dev, UNICAM_IBEA0, endaddr);
+ } else {
+ reg_write(dev, UNICAM_DBSA0, dmaaddr);
+ reg_write(dev, UNICAM_DBEA0, endaddr);
+ }
+}
+
+static inline unsigned int unicam_get_lines_done(struct unicam_device *dev)
+{
+ dma_addr_t start_addr, cur_addr;
+ unsigned int stride = dev->node[IMAGE_PAD].v_fmt.fmt.pix.bytesperline;
+ struct unicam_buffer *frm = dev->node[IMAGE_PAD].cur_frm;
+
+ if (!frm)
+ return 0;
+
+ start_addr = vb2_dma_contig_plane_dma_addr(&frm->vb.vb2_buf, 0);
+ cur_addr = reg_read(dev, UNICAM_IBWP);
+ return (unsigned int)(cur_addr - start_addr) / stride;
+}
+
+static inline void unicam_schedule_next_buffer(struct unicam_node *node)
+{
+ struct unicam_device *dev = node->dev;
+ struct unicam_buffer *buf;
+ unsigned int size;
+ dma_addr_t addr;
+
+ buf = list_first_entry(&node->dma_queue, struct unicam_buffer, list);
+ node->next_frm = buf;
+ list_del(&buf->list);
+
+ addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
+ size = (node->pad_id == IMAGE_PAD) ?
+ node->v_fmt.fmt.pix.sizeimage :
+ node->v_fmt.fmt.meta.buffersize;
+
+ unicam_wr_dma_addr(dev, addr, size, node->pad_id);
+}
+
+static inline void unicam_schedule_dummy_buffer(struct unicam_node *node)
+{
+ struct unicam_device *dev = node->dev;
+
+ unicam_dbg(3, dev, "Scheduling dummy buffer for node %d\n",
+ node->pad_id);
+
+ unicam_wr_dma_addr(dev, node->dummy_buf_dma_addr, DUMMY_BUF_SIZE,
+ node->pad_id);
+ node->next_frm = NULL;
+}
+
+static inline void unicam_process_buffer_complete(struct unicam_node *node,
+ unsigned int sequence)
+{
+ node->cur_frm->vb.field = node->m_fmt.field;
+ node->cur_frm->vb.sequence = sequence;
+
+ vb2_buffer_done(&node->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
+}
+
+static bool unicam_all_nodes_streaming(struct unicam_device *dev)
+{
+ bool ret;
+
+ ret = dev->node[IMAGE_PAD].open && dev->node[IMAGE_PAD].streaming;
+ ret &= !dev->node[METADATA_PAD].open ||
+ dev->node[METADATA_PAD].streaming;
+ return ret;
+}
+
+static bool unicam_all_nodes_disabled(struct unicam_device *dev)
+{
+ return !dev->node[IMAGE_PAD].streaming &&
+ !dev->node[METADATA_PAD].streaming;
+}
+
+static void unicam_queue_event_sof(struct unicam_device *unicam)
+{
+ struct v4l2_event event = {
+ .type = V4L2_EVENT_FRAME_SYNC,
+ .u.frame_sync.frame_sequence = unicam->sequence,
+ };
+
+ v4l2_event_queue(&unicam->node[IMAGE_PAD].video_dev, &event);
+}
+
+/*
+ * 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 = dev;
+ unsigned int lines_done = unicam_get_lines_done(dev);
+ unsigned int sequence = unicam->sequence;
+ unsigned int i;
+ u32 ista, sta;
+ u64 ts;
+
+ /*
+ * 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_all_nodes_disabled(unicam))
+ return IRQ_NONE;
+
+ sta = reg_read(unicam, UNICAM_STA);
+ /* Write value back to clear the interrupts */
+ reg_write(unicam, UNICAM_STA, sta);
+
+ ista = reg_read(unicam, UNICAM_ISTA);
+ /* Write value back to clear the interrupts */
+ reg_write(unicam, 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;
+
+ /*
+ * We must run the frame end handler first. If we have a valid next_frm
+ * and we get a simultaneout FE + FS interrupt, running the FS handler
+ * first would null out the next_frm ptr and we would have lost the
+ * buffer forever.
+ */
+ if (ista & UNICAM_FEI || sta & UNICAM_PI0) {
+ /*
+ * Ensure we have swapped buffers already as we can't
+ * stop the peripheral. If no buffer is available, use a
+ * dummy buffer to dump out frames until we get a new buffer
+ * to use.
+ */
+ for (i = 0; i < ARRAY_SIZE(unicam->node); i++) {
+ if (!unicam->node[i].streaming)
+ continue;
+
+ if (unicam->node[i].cur_frm)
+ unicam_process_buffer_complete(&unicam->node[i],
+ sequence);
+ unicam->node[i].cur_frm = unicam->node[i].next_frm;
+ }
+ unicam->sequence++;
+ }
+
+ if (ista & UNICAM_FSI) {
+ /*
+ * Timestamp is to be when the first data byte was captured,
+ * aka frame start.
+ */
+ ts = ktime_get_ns();
+ for (i = 0; i < ARRAY_SIZE(unicam->node); i++) {
+ if (!unicam->node[i].streaming)
+ continue;
+
+ if (unicam->node[i].cur_frm)
+ unicam->node[i].cur_frm->vb.vb2_buf.timestamp =
+ ts;
+ /*
+ * Set the next frame output to go to a dummy frame
+ * if we have not managed to obtain another frame
+ * from the queue.
+ */
+ unicam_schedule_dummy_buffer(&unicam->node[i]);
+ }
+
+ unicam_queue_event_sof(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)) {
+ for (i = 0; i < ARRAY_SIZE(unicam->node); i++) {
+ if (!unicam->node[i].streaming)
+ continue;
+
+ spin_lock(&unicam->node[i].dma_queue_lock);
+ if (!list_empty(&unicam->node[i].dma_queue) &&
+ !unicam->node[i].next_frm)
+ unicam_schedule_next_buffer(&unicam->node[i]);
+ spin_unlock(&unicam->node[i].dma_queue_lock);
+ }
+ }
+
+ if (reg_read(unicam, UNICAM_ICTL) & UNICAM_FCM) {
+ /* Switch out of trigger mode if selected */
+ reg_write_field(unicam, UNICAM_ICTL, 1, UNICAM_TFC);
+ reg_write_field(unicam, UNICAM_ICTL, 0, UNICAM_FCM);
+ }
+ return IRQ_HANDLED;
+}
+
+static int unicam_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_name(&dev->pdev->dev));
+
+ cap->capabilities |= V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_META_CAPTURE;
+
+ return 0;
+}
+
+static int unicam_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ unsigned int index = 0;
+ unsigned int i;
+ int ret = 0;
+
+ if (node->pad_id != IMAGE_PAD)
+ return -EINVAL;
+
+ for (i = 0; !ret && i < MAX_ENUM_MBUS_CODE; i++) {
+ struct v4l2_subdev_mbus_code_enum mbus_code = {
+ .index = i,
+ .pad = IMAGE_PAD,
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ const struct unicam_fmt *fmt;
+
+ 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 v4l2_mbus_framefmt mbus_fmt = {0};
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ const struct unicam_fmt *fmt = NULL;
+ int ret;
+
+ if (node->pad_id != IMAGE_PAD)
+ return -EINVAL;
+
+ /*
+ * If a flip has occurred in the sensor, the fmt code might have
+ * changed. So we will need to re-fetch the format from the subdevice.
+ */
+ ret = __subdev_get_format(dev, &mbus_fmt, node->pad_id);
+ if (ret)
+ return -EINVAL;
+
+ /* Find the V4L2 format from mbus code. We must match a known format. */
+ fmt = find_format_by_code(mbus_fmt.code);
+ if (!fmt)
+ return -EINVAL;
+
+ node->fmt = fmt;
+ node->v_fmt.fmt.pix.pixelformat = fmt->fourcc;
+ *f = node->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;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ret != -EINVAL && ret != -ENOIOCTLCMD; ++i) {
+ memset(&mbus_code, 0, sizeof(mbus_code));
+ mbus_code.index = i;
+ mbus_code.pad = IMAGE_PAD;
+ mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+
+ 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 %u returned %d - continue\n",
+ i, ret);
+ continue;
+ }
+
+ unicam_dbg(2, dev, "subdev %s: code: 0x%08x idx: %u\n",
+ dev->sensor->name, mbus_code.code, i);
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ struct v4l2_subdev_format sd_fmt = {
+ .which = V4L2_SUBDEV_FORMAT_TRY,
+ .pad = IMAGE_PAD
+ };
+ struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
+ const struct unicam_fmt *fmt;
+ int ret;
+
+ if (node->pad_id != IMAGE_PAD)
+ return -EINVAL;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ struct vb2_queue *q = &node->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, node->pad_id);
+ 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;
+ }
+
+ node->fmt = fmt;
+ node->v_fmt.fmt.pix.pixelformat = f->fmt.pix.pixelformat;
+ node->v_fmt.fmt.pix.bytesperline = f->fmt.pix.bytesperline;
+ unicam_reset_format(node);
+
+ unicam_dbg(3, dev,
+ "%s %dx%d, mbus_fmt 0x%08X, V4L2 pix 0x%08X.\n",
+ __func__, node->v_fmt.fmt.pix.width,
+ node->v_fmt.fmt.pix.height, mbus_fmt.code,
+ node->v_fmt.fmt.pix.pixelformat);
+
+ *f = node->v_fmt;
+
+ return 0;
+}
+
+static int unicam_enum_fmt_meta_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ const struct unicam_fmt *fmt;
+ u32 code;
+ int ret = 0;
+
+ if (node->pad_id != METADATA_PAD || f->index != 0)
+ return -EINVAL;
+
+ if (dev->sensor_embedded_data) {
+ struct v4l2_subdev_mbus_code_enum mbus_code = {
+ .index = f->index,
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ .pad = METADATA_PAD,
+ };
+
+ 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 0 returned %d - index invalid\n",
+ ret);
+ return -EINVAL;
+ }
+
+ code = mbus_code.code;
+ } else {
+ code = MEDIA_BUS_FMT_SENSOR_DATA;
+ }
+
+ fmt = find_format_by_code(code);
+ if (fmt)
+ f->pixelformat = fmt->fourcc;
+
+ return 0;
+}
+
+static int unicam_g_fmt_meta_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct unicam_node *node = video_drvdata(file);
+
+ if (node->pad_id != METADATA_PAD)
+ return -EINVAL;
+
+ *f = node->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_node *node = vb2_get_drv_priv(vq);
+ struct unicam_device *dev = node->dev;
+ unsigned int size = node->pad_id == IMAGE_PAD ?
+ node->v_fmt.fmt.pix.sizeimage :
+ node->v_fmt.fmt.meta.buffersize;
+
+ 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_node *node = vb2_get_drv_priv(vb->vb2_queue);
+ struct unicam_device *dev = node->dev;
+ struct unicam_buffer *buf = to_unicam_buffer(vb);
+ unsigned long size;
+
+ if (WARN_ON(!node->fmt))
+ return -EINVAL;
+
+ size = node->pad_id == IMAGE_PAD ? node->v_fmt.fmt.pix.sizeimage :
+ node->v_fmt.fmt.meta.buffersize;
+ 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_node *node = vb2_get_drv_priv(vb->vb2_queue);
+ struct unicam_buffer *buf = to_unicam_buffer(vb);
+ unsigned long flags;
+
+ spin_lock_irqsave(&node->dma_queue_lock, flags);
+ list_add_tail(&buf->list, &node->dma_queue);
+ spin_unlock_irqrestore(&node->dma_queue_lock, flags);
+}
+
+static void unicam_set_packing_config(struct unicam_device *dev)
+{
+ u32 pack, unpack;
+ u32 val;
+
+ if (dev->node[IMAGE_PAD].v_fmt.fmt.pix.pixelformat ==
+ dev->node[IMAGE_PAD].fmt->fourcc) {
+ unpack = UNICAM_PUM_NONE;
+ pack = UNICAM_PPM_NONE;
+ } else {
+ switch (dev->node[IMAGE_PAD].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, UNICAM_IPIPE, val);
+}
+
+static void unicam_cfg_image_id(struct unicam_device *dev)
+{
+ if (dev->bus_type == V4L2_MBUS_CSI2_DPHY) {
+ /* CSI2 mode, hardcode VC 0 for now. */
+ reg_write(dev, UNICAM_IDI0,
+ (0 << 6) | dev->node[IMAGE_PAD].fmt->csi_dt);
+ } else {
+ /* CCP2 mode */
+ reg_write(dev, UNICAM_IDI0,
+ 0x80 | dev->node[IMAGE_PAD].fmt->csi_dt);
+ }
+}
+
+static void unicam_enable_ed(struct unicam_device *dev)
+{
+ u32 val = reg_read(dev, UNICAM_DCS);
+
+ set_field(&val, 2, UNICAM_EDL_MASK);
+ /* Do not wrap at the end of the embedded data buffer */
+ set_field(&val, 0, UNICAM_DBOB);
+
+ reg_write(dev, UNICAM_DCS, val);
+}
+
+static void unicam_start_rx(struct unicam_device *dev, dma_addr_t *addr)
+{
+ int line_int_freq = dev->node[IMAGE_PAD].v_fmt.fmt.pix.height >> 2;
+ unsigned int size, 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(dev, val);
+
+ /* Basic init */
+ reg_write(dev, 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(dev, UNICAM_ANA, val);
+ usleep_range(1000, 2000);
+
+ /* Come out of reset */
+ reg_write_field(dev, UNICAM_ANA, 0, UNICAM_AR);
+
+ /* Peripheral reset */
+ reg_write_field(dev, UNICAM_CTRL, 1, UNICAM_CPR);
+ reg_write_field(dev, UNICAM_CTRL, 0, UNICAM_CPR);
+
+ reg_write_field(dev, UNICAM_CTRL, 0, UNICAM_CPE);
+
+ /* Enable Rx control. */
+ val = reg_read(dev, 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(dev, UNICAM_CTRL, val);
+
+ reg_write(dev, UNICAM_IHWIN, 0);
+ reg_write(dev, UNICAM_IVWIN, 0);
+
+ /* AXI bus access QoS setup */
+ val = reg_read(dev, 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(dev, UNICAM_PRI, val);
+
+ reg_write_field(dev, UNICAM_ANA, 0, UNICAM_DDL);
+
+ /* Always start in trigger frame capture mode (UNICAM_FCM set) */
+ val = UNICAM_FSIE | UNICAM_FEIE | UNICAM_FCM | UNICAM_IBOB;
+ set_field(&val, line_int_freq, UNICAM_LCIE_MASK);
+ reg_write(dev, UNICAM_ICTL, val);
+ reg_write(dev, UNICAM_STA, UNICAM_STA_MASK_ALL);
+ reg_write(dev, UNICAM_ISTA, UNICAM_ISTA_MASK_ALL);
+
+ /* tclk_term_en */
+ reg_write_field(dev, UNICAM_CLT, 2, UNICAM_CLT1_MASK);
+ /* tclk_settle */
+ reg_write_field(dev, UNICAM_CLT, 6, UNICAM_CLT2_MASK);
+ /* td_term_en */
+ reg_write_field(dev, UNICAM_DLT, 2, UNICAM_DLT1_MASK);
+ /* ths_settle */
+ reg_write_field(dev, UNICAM_DLT, 6, UNICAM_DLT2_MASK);
+ /* trx_enable */
+ reg_write_field(dev, UNICAM_DLT, 0, UNICAM_DLT3_MASK);
+
+ reg_write_field(dev, 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(dev, 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(dev, 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(dev, UNICAM_DAT0, val);
+
+ if (dev->active_data_lanes == 1)
+ val = 0;
+ reg_write(dev, 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(dev, UNICAM_DAT2, val);
+
+ if (dev->active_data_lanes == 3)
+ val = 0;
+ reg_write(dev, UNICAM_DAT3, val);
+ }
+
+ reg_write(dev, UNICAM_IBLS,
+ dev->node[IMAGE_PAD].v_fmt.fmt.pix.bytesperline);
+ size = dev->node[IMAGE_PAD].v_fmt.fmt.pix.sizeimage;
+ unicam_wr_dma_addr(dev, addr[IMAGE_PAD], size, IMAGE_PAD);
+ unicam_set_packing_config(dev);
+ unicam_cfg_image_id(dev);
+
+ val = reg_read(dev, UNICAM_MISC);
+ set_field(&val, 1, UNICAM_FL0);
+ set_field(&val, 1, UNICAM_FL1);
+ reg_write(dev, UNICAM_MISC, val);
+
+ if (dev->node[METADATA_PAD].streaming && dev->sensor_embedded_data) {
+ size = dev->node[METADATA_PAD].v_fmt.fmt.meta.buffersize;
+ unicam_enable_ed(dev);
+ unicam_wr_dma_addr(dev, addr[METADATA_PAD], size, METADATA_PAD);
+ }
+
+ /* Enable peripheral */
+ reg_write_field(dev, UNICAM_CTRL, 1, UNICAM_CPE);
+
+ /* Load image pointers */
+ reg_write_field(dev, UNICAM_ICTL, 1, UNICAM_LIP_MASK);
+
+ /* Load embedded data buffer pointers if needed */
+ if (dev->node[METADATA_PAD].streaming && dev->sensor_embedded_data)
+ reg_write_field(dev, UNICAM_DCS, 1, UNICAM_LDP);
+
+ /*
+ * Enable trigger only for the first frame to
+ * sync correctly to the FS from the source.
+ */
+ reg_write_field(dev, UNICAM_ICTL, 1, UNICAM_TFC);
+}
+
+static void unicam_disable(struct unicam_device *dev)
+{
+ /* Analogue lane control disable */
+ reg_write_field(dev, UNICAM_ANA, 1, UNICAM_DDL);
+
+ /* Stop the output engine */
+ reg_write_field(dev, UNICAM_CTRL, 1, UNICAM_SOE);
+
+ /* Disable the data lanes. */
+ reg_write(dev, UNICAM_DAT0, 0);
+ reg_write(dev, UNICAM_DAT1, 0);
+
+ if (dev->max_data_lanes > 2) {
+ reg_write(dev, UNICAM_DAT2, 0);
+ reg_write(dev, UNICAM_DAT3, 0);
+ }
+
+ /* Peripheral reset */
+ reg_write_field(dev, UNICAM_CTRL, 1, UNICAM_CPR);
+ usleep_range(50, 100);
+ reg_write_field(dev, UNICAM_CTRL, 0, UNICAM_CPR);
+
+ /* Disable peripheral */
+ reg_write_field(dev, UNICAM_CTRL, 0, UNICAM_CPE);
+
+ /* Clear ED setup */
+ reg_write(dev, UNICAM_DCS, 0);
+
+ /* Disable all lane clocks */
+ clk_write(dev, 0);
+}
+
+static void unicam_return_buffers(struct unicam_node *node)
+{
+ struct unicam_buffer *buf, *tmp;
+ unsigned long flags;
+
+ spin_lock_irqsave(&node->dma_queue_lock, flags);
+ list_for_each_entry_safe(buf, tmp, &node->dma_queue, list) {
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ }
+
+ if (node->cur_frm)
+ vb2_buffer_done(&node->cur_frm->vb.vb2_buf,
+ VB2_BUF_STATE_ERROR);
+ if (node->next_frm && node->cur_frm != node->next_frm)
+ vb2_buffer_done(&node->next_frm->vb.vb2_buf,
+ VB2_BUF_STATE_ERROR);
+
+ node->cur_frm = NULL;
+ node->next_frm = NULL;
+ spin_unlock_irqrestore(&node->dma_queue_lock, flags);
+}
+
+static int unicam_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct unicam_node *node = vb2_get_drv_priv(vq);
+ struct unicam_device *dev = node->dev;
+ dma_addr_t buffer_addr[MAX_NODES] = { 0 };
+ unsigned long flags;
+ unsigned int i;
+ int ret;
+
+ node->streaming = true;
+ if (!unicam_all_nodes_streaming(dev)) {
+ unicam_dbg(3, dev, "Not all nodes are streaming yet.");
+ return 0;
+ }
+
+ dev->sequence = 0;
+ ret = unicam_runtime_get(dev);
+ if (ret < 0) {
+ unicam_dbg(3, dev, "unicam_runtime_get failed\n");
+ goto err_streaming;
+ }
+
+ /*
+ * TODO: Retrieve the number of active data lanes from the connected
+ * subdevice.
+ */
+ dev->active_data_lanes = dev->max_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;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(dev->node); i++) {
+ struct unicam_buffer *buf;
+
+ if (!dev->node[i].streaming)
+ continue;
+
+ spin_lock_irqsave(&dev->node[i].dma_queue_lock, flags);
+ buf = list_first_entry(&dev->node[i].dma_queue,
+ struct unicam_buffer, list);
+ dev->node[i].cur_frm = buf;
+ dev->node[i].next_frm = buf;
+ list_del(&buf->list);
+ spin_unlock_irqrestore(&dev->node[i].dma_queue_lock, flags);
+
+ buffer_addr[i] =
+ vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
+ }
+
+ unicam_start_rx(dev, buffer_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_streaming:
+ unicam_return_buffers(node);
+ node->streaming = false;
+
+ return ret;
+}
+
+static void unicam_stop_streaming(struct vb2_queue *vq)
+{
+ struct unicam_node *node = vb2_get_drv_priv(vq);
+ struct unicam_device *dev = node->dev;
+
+ node->streaming = false;
+
+ if (node->pad_id == IMAGE_PAD) {
+ /*
+ * Stop streaming the sensor and disable the peripheral.
+ * We cannot continue streaming embedded data with the
+ * image pad disabled.
+ */
+ if (v4l2_subdev_call(dev->sensor, video, s_stream, 0) < 0)
+ unicam_err(dev, "stream off failed in subdev\n");
+
+ unicam_disable(dev);
+ clk_disable_unprepare(dev->clock);
+ unicam_runtime_put(dev);
+
+ } else if (node->pad_id == METADATA_PAD) {
+ /*
+ * Allow the hardware to spin in the dummy buffer.
+ * This is only really needed if the embedded data pad is
+ * disabled before the image pad.
+ */
+ unicam_wr_dma_addr(dev, node->dummy_buf_dma_addr,
+ DUMMY_BUF_SIZE, METADATA_PAD);
+ }
+
+ /* Clear all queued buffers for the node */
+ unicam_return_buffers(node);
+}
+
+static int unicam_enum_input(struct file *file, void *priv,
+ struct v4l2_input *inp)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ 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(&node->buffer_queue))
+ return -EBUSY;
+
+ ret = v4l2_subdev_call(dev->sensor, video, s_std, std);
+
+ /* Force recomputation of bytesperline */
+ node->v_fmt.fmt.pix.bytesperline = 0;
+
+ unicam_reset_format(node);
+
+ return ret;
+}
+
+static int unicam_s_edid(struct file *file, void *priv, struct v4l2_edid *edid)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ return v4l2_subdev_call(dev->sensor, pad, get_edid, edid);
+}
+
+static int unicam_s_selection(struct file *file, void *priv,
+ struct v4l2_selection *sel)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ struct v4l2_subdev_selection sdsel = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ .target = sel->target,
+ .flags = sel->flags,
+ .r = sel->r,
+ };
+
+ return v4l2_subdev_call(dev->sensor, pad, set_selection, NULL, &sdsel);
+}
+
+static int unicam_g_selection(struct file *file, void *priv,
+ struct v4l2_selection *sel)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ struct v4l2_subdev_selection sdsel = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ .target = sel->target,
+ };
+ int ret;
+
+ ret = v4l2_subdev_call(dev->sensor, pad, get_selection, NULL, &sdsel);
+ if (!ret)
+ sel->r = sdsel.r;
+
+ return ret;
+}
+
+static int unicam_enum_framesizes(struct file *file, void *priv,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ 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.code = fmt->code;
+
+ fse.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ fse.index = fsize->index;
+ fse.pad = node->pad_id;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ 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(&node->buffer_queue))
+ return -EBUSY;
+
+ ret = v4l2_subdev_call(dev->sensor, video, s_dv_timings, timings);
+
+ /* Force recomputation of bytesperline */
+ node->v_fmt.fmt.pix.bytesperline = 0;
+
+ unicam_reset_format(node);
+
+ return ret;
+}
+
+static int unicam_query_dv_timings(struct file *file, void *priv,
+ struct v4l2_dv_timings *timings)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+
+ 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_FRAME_SYNC:
+ return v4l2_event_subscribe(fh, sub, 2, NULL);
+ 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_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ 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",
+ node->v_fmt.fmt.pix.width, node->v_fmt.fmt.pix.height);
+ unicam_info(dev, "Mediabus format: %08x\n", node->fmt->code);
+ unicam_info(dev, "V4L2 format: %08x\n",
+ node->v_fmt.fmt.pix.pixelformat);
+ reg = reg_read(dev, 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(dev, UNICAM_IBLS));
+ unicam_info(dev, "Detected resolution: %ux%u\n",
+ reg_read(dev, UNICAM_IHSTA),
+ reg_read(dev, UNICAM_IVSTA));
+ unicam_info(dev, "Write pointer: %08x\n",
+ reg_read(dev, UNICAM_IBWP));
+
+ return 0;
+}
+
+static void unicam_notify(struct v4l2_subdev *sd,
+ unsigned int notification, void *arg)
+{
+ struct unicam_device *dev = to_unicam_device(sd->v4l2_dev);
+
+ switch (notification) {
+ case V4L2_DEVICE_NOTIFY_EVENT:
+ v4l2_event_queue(&dev->node[IMAGE_PAD].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_v4l2_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_v4l2_open(struct file *file)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ int ret;
+
+ mutex_lock(&node->lock);
+
+ ret = v4l2_fh_open(file);
+ if (ret) {
+ unicam_err(dev, "v4l2_fh_open failed\n");
+ goto unlock;
+ }
+
+ node->open++;
+
+ 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);
+ node->open--;
+ goto unlock;
+ }
+
+ ret = 0;
+
+unlock:
+ mutex_unlock(&node->lock);
+ return ret;
+}
+
+static int unicam_v4l2_release(struct file *file)
+{
+ struct unicam_node *node = video_drvdata(file);
+ struct unicam_device *dev = node->dev;
+ struct v4l2_subdev *sd = dev->sensor;
+ bool fh_singular;
+ int ret;
+
+ mutex_lock(&node->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);
+
+ node->open--;
+ mutex_unlock(&node->lock);
+
+ return ret;
+}
+
+/* unicam capture driver file operations */
+static const struct v4l2_file_operations unicam_fops = {
+ .owner = THIS_MODULE,
+ .open = unicam_v4l2_open,
+ .release = unicam_v4l2_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_fmt_meta_cap = unicam_enum_fmt_meta_cap,
+ .vidioc_g_fmt_meta_cap = unicam_g_fmt_meta_cap,
+ .vidioc_s_fmt_meta_cap = unicam_g_fmt_meta_cap,
+ .vidioc_try_fmt_meta_cap = unicam_g_fmt_meta_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_selection = unicam_g_selection,
+ .vidioc_s_selection = unicam_s_selection,
+
+ .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 = to_unicam_device(notifier->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 void unicam_release(struct kref *kref)
+{
+ struct unicam_device *unicam =
+ container_of(kref, struct unicam_device, kref);
+
+ v4l2_ctrl_handler_free(&unicam->ctrl_handler);
+ media_device_cleanup(&unicam->mdev);
+
+ if (unicam->sensor_config)
+ v4l2_subdev_free_pad_config(unicam->sensor_config);
+
+ kfree(unicam);
+}
+
+static void unicam_put(struct unicam_device *unicam)
+{
+ kref_put(&unicam->kref, unicam_release);
+}
+
+static void unicam_get(struct unicam_device *unicam)
+{
+ kref_get(&unicam->kref);
+}
+
+static void unicam_node_release(struct video_device *vdev)
+{
+ struct unicam_node *node = video_get_drvdata(vdev);
+
+ unicam_put(node->dev);
+}
+
+static int register_node(struct unicam_device *unicam, struct unicam_node *node,
+ enum v4l2_buf_type type, int pad_id)
+{
+ struct video_device *vdev;
+ struct vb2_queue *q;
+ struct v4l2_mbus_framefmt mbus_fmt = {0};
+ const struct unicam_fmt *fmt;
+ int ret;
+
+ if (pad_id == IMAGE_PAD) {
+ ret = __subdev_get_format(unicam, &mbus_fmt, pad_id);
+ 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, pad_id);
+ 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, pad_id);
+ if (ret)
+ return -EINVAL;
+ }
+
+ node->v_fmt.fmt.pix.pixelformat = fmt->fourcc ? fmt->fourcc
+ : fmt->repacked_fourcc;
+ } else {
+ /* Fix this node format as embedded data. */
+ fmt = find_format_by_code(MEDIA_BUS_FMT_SENSOR_DATA);
+ node->v_fmt.fmt.meta.dataformat = fmt->fourcc;
+ }
+
+ node->dev = unicam;
+ node->pad_id = pad_id;
+ node->fmt = fmt;
+
+ /* Read current subdev format */
+ unicam_reset_format(node);
+
+ 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;
+ node->video_dev.tvnorms |= tvnorms;
+ }
+
+ spin_lock_init(&node->dma_queue_lock);
+ mutex_init(&node->lock);
+
+ vdev = &node->video_dev;
+ if (pad_id == IMAGE_PAD) {
+ /* Add controls from the subdevice */
+ ret = v4l2_ctrl_add_handler(&unicam->ctrl_handler,
+ unicam->sensor->ctrl_handler, NULL,
+ true);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * If the sensor subdevice has any controls, associate the node
+ * with the ctrl handler to allow access from userland.
+ */
+ if (!list_empty(&unicam->ctrl_handler.ctrls))
+ vdev->ctrl_handler = &unicam->ctrl_handler;
+ }
+
+ q = &node->buffer_queue;
+ q->type = type;
+ q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
+ q->drv_priv = node;
+ 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 = &node->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(&node->dma_queue);
+
+ vdev->release = unicam_node_release;
+ 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 = &node->lock;
+ vdev->device_caps = (pad_id == IMAGE_PAD) ?
+ (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING) :
+ (V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING);
+
+ /* Define the device names */
+ snprintf(vdev->name, sizeof(vdev->name), "%s-%s", UNICAM_MODULE_NAME,
+ pad_id == IMAGE_PAD ? "image" : "embedded");
+
+ video_set_drvdata(vdev, node);
+ if (pad_id == IMAGE_PAD)
+ vdev->entity.flags |= MEDIA_ENT_FL_DEFAULT;
+ node->pad.flags = MEDIA_PAD_FL_SINK;
+ media_entity_pads_init(&vdev->entity, 1, &node->pad);
+
+ node->dummy_buf_cpu_addr = dma_alloc_coherent(&unicam->pdev->dev,
+ DUMMY_BUF_SIZE,
+ &node->dummy_buf_dma_addr,
+ GFP_KERNEL);
+ if (!node->dummy_buf_cpu_addr) {
+ unicam_err(unicam, "Unable to allocate dummy buffer.\n");
+ return -ENOMEM;
+ }
+
+ if (pad_id == METADATA_PAD) {
+ v4l2_disable_ioctl(vdev, VIDIOC_DQEVENT);
+ v4l2_disable_ioctl(vdev, VIDIOC_SUBSCRIBE_EVENT);
+ v4l2_disable_ioctl(vdev, VIDIOC_UNSUBSCRIBE_EVENT);
+ }
+ if (pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, video, s_std)) {
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_STD);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_G_STD);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_ENUMSTD);
+ }
+ if (pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, video, querystd))
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_QUERYSTD);
+ if (pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, video, s_dv_timings)) {
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_EDID);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_G_EDID);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_DV_TIMINGS_CAP);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_G_DV_TIMINGS);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_DV_TIMINGS);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_ENUM_DV_TIMINGS);
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_QUERY_DV_TIMINGS);
+ }
+ if (pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, pad, enum_frame_interval))
+ v4l2_disable_ioctl(&node->video_dev,
+ VIDIOC_ENUM_FRAMEINTERVALS);
+ if (pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, video, g_frame_interval))
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_G_PARM);
+ if (pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, video, s_frame_interval))
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_PARM);
+
+ if (pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, pad, enum_frame_size))
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_ENUM_FRAMESIZES);
+
+ if (node->pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, pad, set_selection))
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_S_SELECTION);
+
+ if (node->pad_id == METADATA_PAD ||
+ !v4l2_subdev_has_op(unicam->sensor, pad, get_selection))
+ v4l2_disable_ioctl(&node->video_dev, VIDIOC_G_SELECTION);
+
+ ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
+ if (ret) {
+ unicam_err(unicam, "Unable to register video device %s\n",
+ vdev->name);
+ return ret;
+ }
+
+ /*
+ * Acquire a reference to unicam, which will be released when the video
+ * device will be unregistered and userspace will have closed all open
+ * file handles.
+ */
+ unicam_get(unicam);
+ node->registered = true;
+
+ if (pad_id != METADATA_PAD || unicam->sensor_embedded_data) {
+ ret = media_create_pad_link(&unicam->sensor->entity, pad_id,
+ &node->video_dev.entity, 0,
+ MEDIA_LNK_FL_ENABLED |
+ MEDIA_LNK_FL_IMMUTABLE);
+ if (ret)
+ unicam_err(unicam, "Unable to create pad link for %s\n",
+ vdev->name);
+ }
+
+ return ret;
+}
+
+static void unregister_nodes(struct unicam_device *unicam)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(unicam->node); i++) {
+ struct unicam_node *node = &unicam->node[i];
+
+ if (node->dummy_buf_cpu_addr) {
+ dma_free_coherent(&unicam->pdev->dev, DUMMY_BUF_SIZE,
+ node->dummy_buf_cpu_addr,
+ node->dummy_buf_dma_addr);
+ }
+
+ if (node->registered) {
+ node->registered = false;
+ video_unregister_device(&node->video_dev);
+ }
+ }
+}
+
+static int unicam_probe_complete(struct unicam_device *unicam)
+{
+ int ret;
+
+ unicam->v4l2_dev.notify = unicam_notify;
+
+ unicam->sensor_config = v4l2_subdev_alloc_pad_config(unicam->sensor);
+ if (!unicam->sensor_config)
+ return -ENOMEM;
+
+ unicam->sensor_embedded_data = (unicam->sensor->entity.num_pads >= 2);
+
+ ret = register_node(unicam, &unicam->node[IMAGE_PAD],
+ V4L2_BUF_TYPE_VIDEO_CAPTURE, IMAGE_PAD);
+ if (ret) {
+ unicam_err(unicam, "Unable to register image video device.\n");
+ goto unregister;
+ }
+
+ ret = register_node(unicam, &unicam->node[METADATA_PAD],
+ V4L2_BUF_TYPE_META_CAPTURE, METADATA_PAD);
+ if (ret) {
+ unicam_err(unicam, "Unable to register metadata video device.\n");
+ goto unregister;
+ }
+
+ ret = v4l2_device_register_ro_subdev_nodes(&unicam->v4l2_dev);
+ if (ret) {
+ unicam_err(unicam, "Unable to register subdev nodes.\n");
+ goto unregister;
+ }
+
+ /*
+ * Release the initial reference, all references are now owned by the
+ * video devices.
+ */
+ unicam_put(unicam);
+ return 0;
+
+unregister:
+ unregister_nodes(unicam);
+ unicam_put(unicam);
+
+ return ret;
+}
+
+static int unicam_async_complete(struct v4l2_async_notifier *notifier)
+{
+ struct unicam_device *unicam = to_unicam_device(notifier->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 v4l2_fwnode_endpoint ep = { 0 };
+ struct device_node *ep_node;
+ struct device_node *sensor_node;
+ unsigned int lane;
+ int ret = -EINVAL;
+
+ if (of_property_read_u32(pdev->dev.of_node, "brcm,num-data-lanes",
+ &dev->max_data_lanes) < 0) {
+ unicam_err(dev, "number of data lanes not set\n");
+ return -EINVAL;
+ }
+
+ /* Get the local endpoint and remote device. */
+ ep_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);
+ if (!ep_node) {
+ unicam_dbg(3, dev, "can't get next endpoint\n");
+ return -EINVAL;
+ }
+
+ unicam_dbg(3, dev, "ep_node is %pOF\n", ep_node);
+
+ 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(1, dev, "found subdevice %pOF\n", sensor_node);
+
+ /* Parse the local endpoint and validate its configuration. */
+ v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep_node), &ep);
+
+ unicam_dbg(3, dev, "parsed local endpoint, bus_type %u\n",
+ ep.bus_type);
+
+ dev->bus_type = ep.bus_type;
+
+ switch (ep.bus_type) {
+ case V4L2_MBUS_CSI2_DPHY:
+ switch (ep.bus.mipi_csi2.num_data_lanes) {
+ case 1:
+ case 2:
+ case 4:
+ break;
+
+ default:
+ unicam_err(dev, "subdevice %pOF: %u data lanes not supported\n",
+ sensor_node,
+ ep.bus.mipi_csi2.num_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 %pOF: data lanes reordering not supported\n",
+ sensor_node);
+ goto cleanup_exit;
+ }
+ }
+
+ if (ep.bus.mipi_csi2.num_data_lanes > dev->max_data_lanes) {
+ unicam_err(dev, "subdevice requires %u data lanes when %u are supported\n",
+ ep.bus.mipi_csi2.num_data_lanes,
+ dev->max_data_lanes);
+ }
+
+ 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 %pOF: unsupported lanes configuration\n",
+ sensor_node);
+ goto cleanup_exit;
+ }
+
+ dev->max_data_lanes = 1;
+ dev->bus_flags = ep.bus.mipi_csi1.strobe;
+ break;
+
+ default:
+ /* Unsupported bus type */
+ unicam_err(dev, "subdevice %pOF: unsupported bus type %u\n",
+ sensor_node, ep.bus_type);
+ goto cleanup_exit;
+ }
+
+ unicam_dbg(3, dev, "subdevice %pOF: %s bus, %u data lanes, flags=0x%08x\n",
+ sensor_node,
+ dev->bus_type == V4L2_MBUS_CSI2_DPHY ? "CSI-2" : "CCP2",
+ dev->max_data_lanes, dev->bus_flags);
+
+ /* Initialize and register the async notifier. */
+ v4l2_async_nf_init(&dev->notifier);
+ dev->notifier.ops = &unicam_async_ops;
+
+ dev->asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
+ dev->asd.match.fwnode = of_fwnode_handle(sensor_node);
+ ret = __v4l2_async_nf_add_subdev(&dev->notifier, &dev->asd);
+ if (ret) {
+ unicam_err(dev, "Error adding subdevice: %d\n", ret);
+ goto cleanup_exit;
+ }
+
+ ret = v4l2_async_nf_register(&dev->v4l2_dev, &dev->notifier);
+ if (ret) {
+ unicam_err(dev, "Error registering async notifier: %d\n", ret);
+ ret = -EINVAL;
+ }
+
+cleanup_exit:
+ of_node_put(sensor_node);
+ of_node_put(ep_node);
+
+ return ret;
+}
+
+static int unicam_probe(struct platform_device *pdev)
+{
+ struct unicam_device *unicam;
+ int ret;
+
+ unicam = kzalloc(sizeof(*unicam), GFP_KERNEL);
+ if (!unicam)
+ return -ENOMEM;
+
+ kref_init(&unicam->kref);
+ unicam->pdev = pdev;
+
+ unicam->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(unicam->base)) {
+ unicam_err(unicam, "Failed to get main io block\n");
+ ret = PTR_ERR(unicam->base);
+ goto err_unicam_put;
+ }
+
+ unicam->clk_gate_base = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(unicam->clk_gate_base)) {
+ unicam_err(unicam, "Failed to get 2nd io block\n");
+ ret = PTR_ERR(unicam->clk_gate_base);
+ goto err_unicam_put;
+ }
+
+ unicam->clock = devm_clk_get(&pdev->dev, "lp");
+ if (IS_ERR(unicam->clock)) {
+ unicam_err(unicam, "Failed to get clock\n");
+ ret = PTR_ERR(unicam->clock);
+ goto err_unicam_put;
+ }
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret <= 0) {
+ dev_err(&pdev->dev, "No IRQ resource\n");
+ ret = -EINVAL;
+ goto err_unicam_put;
+ }
+
+ ret = devm_request_irq(&pdev->dev, ret, unicam_isr, 0,
+ "unicam_capture0", unicam);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to request interrupt\n");
+ ret = -EINVAL;
+ goto err_unicam_put;
+ }
+
+ 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", dev_name(&pdev->dev));
+ unicam->mdev.hw_revision = 0;
+
+ 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 err_unicam_put;
+ }
+
+ ret = media_device_register(&unicam->mdev);
+ if (ret < 0) {
+ unicam_err(unicam,
+ "Unable to register media-controller device.\n");
+ goto err_v4l2_unregister;
+ }
+
+ /* Reserve space for the controls */
+ ret = v4l2_ctrl_handler_init(&unicam->ctrl_handler, 16);
+ if (ret < 0)
+ goto err_media_unregister;
+
+ /* 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 err_media_unregister;
+ }
+
+ /* Enable the block power domain */
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+
+err_media_unregister:
+ media_device_unregister(&unicam->mdev);
+err_v4l2_unregister:
+ v4l2_device_unregister(&unicam->v4l2_dev);
+err_unicam_put:
+ unicam_put(unicam);
+
+ 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__);
+
+ v4l2_async_nf_unregister(&unicam->notifier);
+ v4l2_device_unregister(&unicam->v4l2_dev);
+ media_device_unregister(&unicam->mdev);
+ unregister_nodes(unicam);
+
+ pm_runtime_disable(&pdev->dev);
+
+ 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 <dave.stevenson@raspberrypi.com>");
+MODULE_DESCRIPTION("BCM2835 Unicam driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(UNICAM_VERSION);
projects / platform / kernel / linux-rpi.git / commitdiff