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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * A virtual v4l2-mem2mem example device.
- *
- * This is a virtual device driver for testing mem-to-mem videobuf framework.
- * It simulates a device that uses memory buffers for both source and
- * destination, processes the data and issues an "irq" (simulated by a delayed
- * workqueue).
- * The device is capable of multi-instance, multi-buffer-per-transaction
- * operation (via the mem2mem framework).
- *
- * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
- * Pawel Osciak, <pawel@osciak.com>
- * Marek Szyprowski, <m.szyprowski@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version
- */
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/fs.h>
- #include <linux/sched.h>
- #include <linux/slab.h>
- #include <linux/platform_device.h>
- #include <media/v4l2-mem2mem.h>
- #include <media/v4l2-device.h>
- #include <media/v4l2-ioctl.h>
- #include <media/v4l2-ctrls.h>
- #include <media/v4l2-event.h>
- #include <media/videobuf2-vmalloc.h>
- MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
- MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
- MODULE_LICENSE("GPL");
- MODULE_VERSION("0.2");
- MODULE_ALIAS("mem2mem_testdev");
- static unsigned int debug;
- module_param(debug, uint, 0644);
- MODULE_PARM_DESC(debug, "debug level");
- /* Default transaction time in msec */
- static unsigned int default_transtime = 40; /* Max 25 fps */
- module_param(default_transtime, uint, 0644);
- MODULE_PARM_DESC(default_transtime, "default transaction time in ms");
- #define MIN_W 32
- #define MIN_H 32
- #define MAX_W 640
- #define MAX_H 480
- /* Pixel alignment for non-bayer formats */
- #define WIDTH_ALIGN 2
- #define HEIGHT_ALIGN 1
- /* Pixel alignment for bayer formats */
- #define BAYER_WIDTH_ALIGN 2
- #define BAYER_HEIGHT_ALIGN 2
- /* Flags that indicate a format can be used for capture/output */
- #define MEM2MEM_CAPTURE BIT(0)
- #define MEM2MEM_OUTPUT BIT(1)
- #define MEM2MEM_NAME "vim2m"
- /* Per queue */
- #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
- /* In bytes, per queue */
- #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
- /* Flags that indicate processing mode */
- #define MEM2MEM_HFLIP BIT(0)
- #define MEM2MEM_VFLIP BIT(1)
- #define dprintk(dev, lvl, fmt, arg...) \
- v4l2_dbg(lvl, debug, &(dev)->v4l2_dev, "%s: " fmt, __func__, ## arg)
- static void vim2m_dev_release(struct device *dev)
- {}
- static struct platform_device vim2m_pdev = {
- .name = MEM2MEM_NAME,
- .dev.release = vim2m_dev_release,
- };
- struct vim2m_fmt {
- u32 fourcc;
- int depth;
- /* Types the format can be used for */
- u32 types;
- };
- static struct vim2m_fmt formats[] = {
- {
- .fourcc = V4L2_PIX_FMT_RGB565, /* rrrrrggg gggbbbbb */
- .depth = 16,
- .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
- }, {
- .fourcc = V4L2_PIX_FMT_RGB565X, /* gggbbbbb rrrrrggg */
- .depth = 16,
- .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
- }, {
- .fourcc = V4L2_PIX_FMT_RGB24,
- .depth = 24,
- .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
- }, {
- .fourcc = V4L2_PIX_FMT_BGR24,
- .depth = 24,
- .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
- }, {
- .fourcc = V4L2_PIX_FMT_YUYV,
- .depth = 16,
- .types = MEM2MEM_CAPTURE,
- }, {
- .fourcc = V4L2_PIX_FMT_SBGGR8,
- .depth = 8,
- .types = MEM2MEM_CAPTURE,
- }, {
- .fourcc = V4L2_PIX_FMT_SGBRG8,
- .depth = 8,
- .types = MEM2MEM_CAPTURE,
- }, {
- .fourcc = V4L2_PIX_FMT_SGRBG8,
- .depth = 8,
- .types = MEM2MEM_CAPTURE,
- }, {
- .fourcc = V4L2_PIX_FMT_SRGGB8,
- .depth = 8,
- .types = MEM2MEM_CAPTURE,
- },
- };
- #define NUM_FORMATS ARRAY_SIZE(formats)
- /* Per-queue, driver-specific private data */
- struct vim2m_q_data {
- unsigned int width;
- unsigned int height;
- unsigned int sizeimage;
- unsigned int sequence;
- struct vim2m_fmt *fmt;
- };
- enum {
- V4L2_M2M_SRC = 0,
- V4L2_M2M_DST = 1,
- };
- #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000)
- #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001)
- static struct vim2m_fmt *find_format(u32 fourcc)
- {
- struct vim2m_fmt *fmt;
- unsigned int k;
- for (k = 0; k < NUM_FORMATS; k++) {
- fmt = &formats[k];
- if (fmt->fourcc == fourcc)
- break;
- }
- if (k == NUM_FORMATS)
- return NULL;
- return &formats[k];
- }
- static void get_alignment(u32 fourcc,
- unsigned int *walign, unsigned int *halign)
- {
- switch (fourcc) {
- case V4L2_PIX_FMT_SBGGR8:
- case V4L2_PIX_FMT_SGBRG8:
- case V4L2_PIX_FMT_SGRBG8:
- case V4L2_PIX_FMT_SRGGB8:
- *walign = BAYER_WIDTH_ALIGN;
- *halign = BAYER_HEIGHT_ALIGN;
- return;
- default:
- *walign = WIDTH_ALIGN;
- *halign = HEIGHT_ALIGN;
- return;
- }
- }
- struct vim2m_dev {
- struct v4l2_device v4l2_dev;
- struct video_device vfd;
- #ifdef CONFIG_MEDIA_CONTROLLER
- struct media_device mdev;
- #endif
- atomic_t num_inst;
- struct mutex dev_mutex;
- struct v4l2_m2m_dev *m2m_dev;
- };
- struct vim2m_ctx {
- struct v4l2_fh fh;
- struct vim2m_dev *dev;
- struct v4l2_ctrl_handler hdl;
- /* Processed buffers in this transaction */
- u8 num_processed;
- /* Transaction length (i.e. how many buffers per transaction) */
- u32 translen;
- /* Transaction time (i.e. simulated processing time) in milliseconds */
- u32 transtime;
- struct mutex vb_mutex;
- struct delayed_work work_run;
- spinlock_t irqlock;
- /* Abort requested by m2m */
- int aborting;
- /* Processing mode */
- int mode;
- enum v4l2_colorspace colorspace;
- enum v4l2_ycbcr_encoding ycbcr_enc;
- enum v4l2_xfer_func xfer_func;
- enum v4l2_quantization quant;
- /* Source and destination queue data */
- struct vim2m_q_data q_data[2];
- };
- static inline struct vim2m_ctx *file2ctx(struct file *file)
- {
- return container_of(file->private_data, struct vim2m_ctx, fh);
- }
- static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
- enum v4l2_buf_type type)
- {
- switch (type) {
- case V4L2_BUF_TYPE_VIDEO_OUTPUT:
- return &ctx->q_data[V4L2_M2M_SRC];
- case V4L2_BUF_TYPE_VIDEO_CAPTURE:
- return &ctx->q_data[V4L2_M2M_DST];
- default:
- return NULL;
- }
- }
- static const char *type_name(enum v4l2_buf_type type)
- {
- switch (type) {
- case V4L2_BUF_TYPE_VIDEO_OUTPUT:
- return "Output";
- case V4L2_BUF_TYPE_VIDEO_CAPTURE:
- return "Capture";
- default:
- return "Invalid";
- }
- }
- #define CLIP(__color) \
- (u8)(((__color) > 0xff) ? 0xff : (((__color) < 0) ? 0 : (__color)))
- static void copy_line(struct vim2m_q_data *q_data_out,
- u8 *src, u8 *dst, bool reverse)
- {
- int x, depth = q_data_out->fmt->depth >> 3;
- if (!reverse) {
- memcpy(dst, src, q_data_out->width * depth);
- } else {
- for (x = 0; x < q_data_out->width >> 1; x++) {
- memcpy(dst, src, depth);
- memcpy(dst + depth, src - depth, depth);
- src -= depth << 1;
- dst += depth << 1;
- }
- return;
- }
- }
- static void copy_two_pixels(struct vim2m_q_data *q_data_in,
- struct vim2m_q_data *q_data_out,
- u8 *src[2], u8 **dst, int ypos, bool reverse)
- {
- struct vim2m_fmt *out = q_data_out->fmt;
- struct vim2m_fmt *in = q_data_in->fmt;
- u8 _r[2], _g[2], _b[2], *r, *g, *b;
- int i;
- /* Step 1: read two consecutive pixels from src pointer */
- r = _r;
- g = _g;
- b = _b;
- switch (in->fourcc) {
- case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */
- for (i = 0; i < 2; i++) {
- u16 pix = le16_to_cpu(*(__le16 *)(src[i]));
- *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07;
- *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03;
- *b++ = (u8)((pix & 0x1f) << 3) | 0x07;
- }
- break;
- case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */
- for (i = 0; i < 2; i++) {
- u16 pix = be16_to_cpu(*(__be16 *)(src[i]));
- *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07;
- *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03;
- *b++ = (u8)((pix & 0x1f) << 3) | 0x07;
- }
- break;
- default:
- case V4L2_PIX_FMT_RGB24:
- for (i = 0; i < 2; i++) {
- *r++ = src[i][0];
- *g++ = src[i][1];
- *b++ = src[i][2];
- }
- break;
- case V4L2_PIX_FMT_BGR24:
- for (i = 0; i < 2; i++) {
- *b++ = src[i][0];
- *g++ = src[i][1];
- *r++ = src[i][2];
- }
- break;
- }
- /* Step 2: store two consecutive points, reversing them if needed */
- r = _r;
- g = _g;
- b = _b;
- switch (out->fourcc) {
- case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */
- for (i = 0; i < 2; i++) {
- u16 pix;
- __le16 *dst_pix = (__le16 *)*dst;
- pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) |
- (*b >> 3);
- *dst_pix = cpu_to_le16(pix);
- *dst += 2;
- }
- return;
- case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */
- for (i = 0; i < 2; i++) {
- u16 pix;
- __be16 *dst_pix = (__be16 *)*dst;
- pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) |
- (*b >> 3);
- *dst_pix = cpu_to_be16(pix);
- *dst += 2;
- }
- return;
- case V4L2_PIX_FMT_RGB24:
- for (i = 0; i < 2; i++) {
- *(*dst)++ = *r++;
- *(*dst)++ = *g++;
- *(*dst)++ = *b++;
- }
- return;
- case V4L2_PIX_FMT_BGR24:
- for (i = 0; i < 2; i++) {
- *(*dst)++ = *b++;
- *(*dst)++ = *g++;
- *(*dst)++ = *r++;
- }
- return;
- case V4L2_PIX_FMT_YUYV:
- default:
- {
- u8 y, y1, u, v;
- y = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b)
- + 524288) >> 15);
- u = ((-4878 * (*r) - 9578 * (*g) + 14456 * (*b)
- + 4210688) >> 15);
- v = ((14456 * (*r++) - 12105 * (*g++) - 2351 * (*b++)
- + 4210688) >> 15);
- y1 = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b)
- + 524288) >> 15);
- *(*dst)++ = y;
- *(*dst)++ = u;
- *(*dst)++ = y1;
- *(*dst)++ = v;
- return;
- }
- case V4L2_PIX_FMT_SBGGR8:
- if (!(ypos & 1)) {
- *(*dst)++ = *b;
- *(*dst)++ = *++g;
- } else {
- *(*dst)++ = *g;
- *(*dst)++ = *++r;
- }
- return;
- case V4L2_PIX_FMT_SGBRG8:
- if (!(ypos & 1)) {
- *(*dst)++ = *g;
- *(*dst)++ = *++b;
- } else {
- *(*dst)++ = *r;
- *(*dst)++ = *++g;
- }
- return;
- case V4L2_PIX_FMT_SGRBG8:
- if (!(ypos & 1)) {
- *(*dst)++ = *g;
- *(*dst)++ = *++r;
- } else {
- *(*dst)++ = *b;
- *(*dst)++ = *++g;
- }
- return;
- case V4L2_PIX_FMT_SRGGB8:
- if (!(ypos & 1)) {
- *(*dst)++ = *r;
- *(*dst)++ = *++g;
- } else {
- *(*dst)++ = *g;
- *(*dst)++ = *++b;
- }
- return;
- }
- }
- static int device_process(struct vim2m_ctx *ctx,
- struct vb2_v4l2_buffer *in_vb,
- struct vb2_v4l2_buffer *out_vb)
- {
- struct vim2m_dev *dev = ctx->dev;
- struct vim2m_q_data *q_data_in, *q_data_out;
- u8 *p_in, *p_line, *p_in_x[2], *p, *p_out;
- unsigned int width, height, bytesperline, bytes_per_pixel;
- unsigned int x, y, y_in, y_out, x_int, x_fract, x_err, x_offset;
- int start, end, step;
- q_data_in = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
- if (!q_data_in)
- return 0;
- bytesperline = (q_data_in->width * q_data_in->fmt->depth) >> 3;
- bytes_per_pixel = q_data_in->fmt->depth >> 3;
- q_data_out = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
- if (!q_data_out)
- return 0;
- /* As we're doing scaling, use the output dimensions here */
- height = q_data_out->height;
- width = q_data_out->width;
- p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0);
- p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0);
- if (!p_in || !p_out) {
- v4l2_err(&dev->v4l2_dev,
- "Acquiring kernel pointers to buffers failed\n");
- return -EFAULT;
- }
- out_vb->sequence = q_data_out->sequence++;
- in_vb->sequence = q_data_in->sequence++;
- v4l2_m2m_buf_copy_metadata(in_vb, out_vb, true);
- if (ctx->mode & MEM2MEM_VFLIP) {
- start = height - 1;
- end = -1;
- step = -1;
- } else {
- start = 0;
- end = height;
- step = 1;
- }
- y_out = 0;
- /*
- * When format and resolution are identical,
- * we can use a faster copy logic
- */
- if (q_data_in->fmt->fourcc == q_data_out->fmt->fourcc &&
- q_data_in->width == q_data_out->width &&
- q_data_in->height == q_data_out->height) {
- for (y = start; y != end; y += step, y_out++) {
- p = p_in + (y * bytesperline);
- if (ctx->mode & MEM2MEM_HFLIP)
- p += bytesperline - (q_data_in->fmt->depth >> 3);
- copy_line(q_data_out, p, p_out,
- ctx->mode & MEM2MEM_HFLIP);
- p_out += bytesperline;
- }
- return 0;
- }
- /* Slower algorithm with format conversion, hflip, vflip and scaler */
- /* To speed scaler up, use Bresenham for X dimension */
- x_int = q_data_in->width / q_data_out->width;
- x_fract = q_data_in->width % q_data_out->width;
- for (y = start; y != end; y += step, y_out++) {
- y_in = (y * q_data_in->height) / q_data_out->height;
- x_offset = 0;
- x_err = 0;
- p_line = p_in + (y_in * bytesperline);
- if (ctx->mode & MEM2MEM_HFLIP)
- p_line += bytesperline - (q_data_in->fmt->depth >> 3);
- p_in_x[0] = p_line;
- for (x = 0; x < width >> 1; x++) {
- x_offset += x_int;
- x_err += x_fract;
- if (x_err > width) {
- x_offset++;
- x_err -= width;
- }
- if (ctx->mode & MEM2MEM_HFLIP)
- p_in_x[1] = p_line - x_offset * bytes_per_pixel;
- else
- p_in_x[1] = p_line + x_offset * bytes_per_pixel;
- copy_two_pixels(q_data_in, q_data_out,
- p_in_x, &p_out, y_out,
- ctx->mode & MEM2MEM_HFLIP);
- /* Calculate the next p_in_x0 */
- x_offset += x_int;
- x_err += x_fract;
- if (x_err > width) {
- x_offset++;
- x_err -= width;
- }
- if (ctx->mode & MEM2MEM_HFLIP)
- p_in_x[0] = p_line - x_offset * bytes_per_pixel;
- else
- p_in_x[0] = p_line + x_offset * bytes_per_pixel;
- }
- }
- return 0;
- }
- /*
- * mem2mem callbacks
- */
- /*
- * job_ready() - check whether an instance is ready to be scheduled to run
- */
- static int job_ready(void *priv)
- {
- struct vim2m_ctx *ctx = priv;
- if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
- || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
- dprintk(ctx->dev, 1, "Not enough buffers available\n");
- return 0;
- }
- return 1;
- }
- static void job_abort(void *priv)
- {
- struct vim2m_ctx *ctx = priv;
- /* Will cancel the transaction in the next interrupt handler */
- ctx->aborting = 1;
- }
- /* device_run() - prepares and starts the device
- *
- * This simulates all the immediate preparations required before starting
- * a device. This will be called by the framework when it decides to schedule
- * a particular instance.
- */
- static void device_run(void *priv)
- {
- struct vim2m_ctx *ctx = priv;
- struct vb2_v4l2_buffer *src_buf, *dst_buf;
- src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
- dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
- /* Apply request controls if any */
- v4l2_ctrl_request_setup(src_buf->vb2_buf.req_obj.req,
- &ctx->hdl);
- device_process(ctx, src_buf, dst_buf);
- /* Complete request controls if any */
- v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req,
- &ctx->hdl);
- /* Run delayed work, which simulates a hardware irq */
- schedule_delayed_work(&ctx->work_run, msecs_to_jiffies(ctx->transtime));
- }
- static void device_work(struct work_struct *w)
- {
- struct vim2m_ctx *curr_ctx;
- struct vim2m_dev *vim2m_dev;
- struct vb2_v4l2_buffer *src_vb, *dst_vb;
- unsigned long flags;
- curr_ctx = container_of(w, struct vim2m_ctx, work_run.work);
- if (!curr_ctx) {
- pr_err("Instance released before the end of transaction\n");
- return;
- }
- vim2m_dev = curr_ctx->dev;
- src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
- dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
- curr_ctx->num_processed++;
- spin_lock_irqsave(&curr_ctx->irqlock, flags);
- v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
- v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
- spin_unlock_irqrestore(&curr_ctx->irqlock, flags);
- if (curr_ctx->num_processed == curr_ctx->translen
- || curr_ctx->aborting) {
- dprintk(curr_ctx->dev, 2, "Finishing capture buffer fill\n");
- curr_ctx->num_processed = 0;
- v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
- } else {
- device_run(curr_ctx);
- }
- }
- /*
- * video ioctls
- */
- static int vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *cap)
- {
- strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
- strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
- snprintf(cap->bus_info, sizeof(cap->bus_info),
- "platform:%s", MEM2MEM_NAME);
- return 0;
- }
- static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
- {
- int i, num;
- struct vim2m_fmt *fmt;
- num = 0;
- for (i = 0; i < NUM_FORMATS; ++i) {
- if (formats[i].types & type) {
- /* index-th format of type type found ? */
- if (num == f->index)
- break;
- /*
- * Correct type but haven't reached our index yet,
- * just increment per-type index
- */
- ++num;
- }
- }
- if (i < NUM_FORMATS) {
- /* Format found */
- fmt = &formats[i];
- f->pixelformat = fmt->fourcc;
- return 0;
- }
- /* Format not found */
- return -EINVAL;
- }
- static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_fmtdesc *f)
- {
- return enum_fmt(f, MEM2MEM_CAPTURE);
- }
- static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_fmtdesc *f)
- {
- return enum_fmt(f, MEM2MEM_OUTPUT);
- }
- static int vidioc_enum_framesizes(struct file *file, void *priv,
- struct v4l2_frmsizeenum *fsize)
- {
- if (fsize->index != 0)
- return -EINVAL;
- if (!find_format(fsize->pixel_format))
- return -EINVAL;
- fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
- fsize->stepwise.min_width = MIN_W;
- fsize->stepwise.min_height = MIN_H;
- fsize->stepwise.max_width = MAX_W;
- fsize->stepwise.max_height = MAX_H;
- get_alignment(fsize->pixel_format,
- &fsize->stepwise.step_width,
- &fsize->stepwise.step_height);
- return 0;
- }
- static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
- {
- struct vb2_queue *vq;
- struct vim2m_q_data *q_data;
- vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
- if (!vq)
- return -EINVAL;
- q_data = get_q_data(ctx, f->type);
- if (!q_data)
- return -EINVAL;
- f->fmt.pix.width = q_data->width;
- f->fmt.pix.height = q_data->height;
- f->fmt.pix.field = V4L2_FIELD_NONE;
- f->fmt.pix.pixelformat = q_data->fmt->fourcc;
- f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
- f->fmt.pix.sizeimage = q_data->sizeimage;
- f->fmt.pix.colorspace = ctx->colorspace;
- f->fmt.pix.xfer_func = ctx->xfer_func;
- f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
- f->fmt.pix.quantization = ctx->quant;
- return 0;
- }
- static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- return vidioc_g_fmt(file2ctx(file), f);
- }
- static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- return vidioc_g_fmt(file2ctx(file), f);
- }
- static int vidioc_try_fmt(struct v4l2_format *f, struct vim2m_fmt *fmt)
- {
- int walign, halign;
- /*
- * V4L2 specification specifies the driver corrects the
- * format struct if any of the dimensions is unsupported
- */
- if (f->fmt.pix.height < MIN_H)
- f->fmt.pix.height = MIN_H;
- else if (f->fmt.pix.height > MAX_H)
- f->fmt.pix.height = MAX_H;
- if (f->fmt.pix.width < MIN_W)
- f->fmt.pix.width = MIN_W;
- else if (f->fmt.pix.width > MAX_W)
- f->fmt.pix.width = MAX_W;
- get_alignment(f->fmt.pix.pixelformat, &walign, &halign);
- f->fmt.pix.width &= ~(walign - 1);
- f->fmt.pix.height &= ~(halign - 1);
- f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
- f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
- f->fmt.pix.field = V4L2_FIELD_NONE;
- return 0;
- }
- static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- struct vim2m_fmt *fmt;
- struct vim2m_ctx *ctx = file2ctx(file);
- fmt = find_format(f->fmt.pix.pixelformat);
- if (!fmt) {
- f->fmt.pix.pixelformat = formats[0].fourcc;
- fmt = find_format(f->fmt.pix.pixelformat);
- }
- if (!(fmt->types & MEM2MEM_CAPTURE)) {
- v4l2_err(&ctx->dev->v4l2_dev,
- "Fourcc format (0x%08x) invalid.\n",
- f->fmt.pix.pixelformat);
- return -EINVAL;
- }
- f->fmt.pix.colorspace = ctx->colorspace;
- f->fmt.pix.xfer_func = ctx->xfer_func;
- f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
- f->fmt.pix.quantization = ctx->quant;
- return vidioc_try_fmt(f, fmt);
- }
- static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- struct vim2m_fmt *fmt;
- struct vim2m_ctx *ctx = file2ctx(file);
- fmt = find_format(f->fmt.pix.pixelformat);
- if (!fmt) {
- f->fmt.pix.pixelformat = formats[0].fourcc;
- fmt = find_format(f->fmt.pix.pixelformat);
- }
- if (!(fmt->types & MEM2MEM_OUTPUT)) {
- v4l2_err(&ctx->dev->v4l2_dev,
- "Fourcc format (0x%08x) invalid.\n",
- f->fmt.pix.pixelformat);
- return -EINVAL;
- }
- if (!f->fmt.pix.colorspace)
- f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
- return vidioc_try_fmt(f, fmt);
- }
- static int vidioc_s_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
- {
- struct vim2m_q_data *q_data;
- struct vb2_queue *vq;
- vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
- if (!vq)
- return -EINVAL;
- q_data = get_q_data(ctx, f->type);
- if (!q_data)
- return -EINVAL;
- if (vb2_is_busy(vq)) {
- v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
- return -EBUSY;
- }
- q_data->fmt = find_format(f->fmt.pix.pixelformat);
- q_data->width = f->fmt.pix.width;
- q_data->height = f->fmt.pix.height;
- q_data->sizeimage = q_data->width * q_data->height
- * q_data->fmt->depth >> 3;
- dprintk(ctx->dev, 1,
- "Format for type %s: %dx%d (%d bpp), fmt: %c%c%c%c\n",
- type_name(f->type), q_data->width, q_data->height,
- q_data->fmt->depth,
- (q_data->fmt->fourcc & 0xff),
- (q_data->fmt->fourcc >> 8) & 0xff,
- (q_data->fmt->fourcc >> 16) & 0xff,
- (q_data->fmt->fourcc >> 24) & 0xff);
- return 0;
- }
- static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- int ret;
- ret = vidioc_try_fmt_vid_cap(file, priv, f);
- if (ret)
- return ret;
- return vidioc_s_fmt(file2ctx(file), f);
- }
- static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- struct vim2m_ctx *ctx = file2ctx(file);
- int ret;
- ret = vidioc_try_fmt_vid_out(file, priv, f);
- if (ret)
- return ret;
- ret = vidioc_s_fmt(file2ctx(file), f);
- if (!ret) {
- ctx->colorspace = f->fmt.pix.colorspace;
- ctx->xfer_func = f->fmt.pix.xfer_func;
- ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
- ctx->quant = f->fmt.pix.quantization;
- }
- return ret;
- }
- static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
- {
- struct vim2m_ctx *ctx =
- container_of(ctrl->handler, struct vim2m_ctx, hdl);
- switch (ctrl->id) {
- case V4L2_CID_HFLIP:
- if (ctrl->val)
- ctx->mode |= MEM2MEM_HFLIP;
- else
- ctx->mode &= ~MEM2MEM_HFLIP;
- break;
- case V4L2_CID_VFLIP:
- if (ctrl->val)
- ctx->mode |= MEM2MEM_VFLIP;
- else
- ctx->mode &= ~MEM2MEM_VFLIP;
- break;
- case V4L2_CID_TRANS_TIME_MSEC:
- ctx->transtime = ctrl->val;
- if (ctx->transtime < 1)
- ctx->transtime = 1;
- break;
- case V4L2_CID_TRANS_NUM_BUFS:
- ctx->translen = ctrl->val;
- break;
- default:
- v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
- return -EINVAL;
- }
- return 0;
- }
- static const struct v4l2_ctrl_ops vim2m_ctrl_ops = {
- .s_ctrl = vim2m_s_ctrl,
- };
- static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
- .vidioc_querycap = vidioc_querycap,
- .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
- .vidioc_enum_framesizes = vidioc_enum_framesizes,
- .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
- .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
- .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
- .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
- .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
- .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
- .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
- .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
- .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
- .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
- .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
- .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
- .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
- .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
- .vidioc_streamon = v4l2_m2m_ioctl_streamon,
- .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
- .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
- .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
- };
- /*
- * Queue operations
- */
- static int vim2m_queue_setup(struct vb2_queue *vq,
- unsigned int *nbuffers,
- unsigned int *nplanes,
- unsigned int sizes[],
- struct device *alloc_devs[])
- {
- struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
- struct vim2m_q_data *q_data;
- unsigned int size, count = *nbuffers;
- q_data = get_q_data(ctx, vq->type);
- if (!q_data)
- return -EINVAL;
- size = q_data->width * q_data->height * q_data->fmt->depth >> 3;
- while (size * count > MEM2MEM_VID_MEM_LIMIT)
- (count)--;
- *nbuffers = count;
- if (*nplanes)
- return sizes[0] < size ? -EINVAL : 0;
- *nplanes = 1;
- sizes[0] = size;
- dprintk(ctx->dev, 1, "%s: get %d buffer(s) of size %d each.\n",
- type_name(vq->type), count, size);
- return 0;
- }
- static int vim2m_buf_out_validate(struct vb2_buffer *vb)
- {
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
- if (vbuf->field == V4L2_FIELD_ANY)
- vbuf->field = V4L2_FIELD_NONE;
- if (vbuf->field != V4L2_FIELD_NONE) {
- dprintk(ctx->dev, 1, "%s field isn't supported\n", __func__);
- return -EINVAL;
- }
- return 0;
- }
- static int vim2m_buf_prepare(struct vb2_buffer *vb)
- {
- struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
- struct vim2m_q_data *q_data;
- dprintk(ctx->dev, 2, "type: %s\n", type_name(vb->vb2_queue->type));
- q_data = get_q_data(ctx, vb->vb2_queue->type);
- if (!q_data)
- return -EINVAL;
- if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
- dprintk(ctx->dev, 1,
- "%s data will not fit into plane (%lu < %lu)\n",
- __func__, vb2_plane_size(vb, 0),
- (long)q_data->sizeimage);
- return -EINVAL;
- }
- vb2_set_plane_payload(vb, 0, q_data->sizeimage);
- return 0;
- }
- static void vim2m_buf_queue(struct vb2_buffer *vb)
- {
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
- v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
- }
- static int vim2m_start_streaming(struct vb2_queue *q, unsigned int count)
- {
- struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
- struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
- if (!q_data)
- return -EINVAL;
- if (V4L2_TYPE_IS_OUTPUT(q->type))
- ctx->aborting = 0;
- q_data->sequence = 0;
- return 0;
- }
- static void vim2m_stop_streaming(struct vb2_queue *q)
- {
- struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
- struct vb2_v4l2_buffer *vbuf;
- unsigned long flags;
- cancel_delayed_work_sync(&ctx->work_run);
- for (;;) {
- if (V4L2_TYPE_IS_OUTPUT(q->type))
- vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
- else
- vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
- if (!vbuf)
- return;
- v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req,
- &ctx->hdl);
- spin_lock_irqsave(&ctx->irqlock, flags);
- v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
- spin_unlock_irqrestore(&ctx->irqlock, flags);
- }
- }
- static void vim2m_buf_request_complete(struct vb2_buffer *vb)
- {
- struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
- v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl);
- }
- static const struct vb2_ops vim2m_qops = {
- .queue_setup = vim2m_queue_setup,
- .buf_out_validate = vim2m_buf_out_validate,
- .buf_prepare = vim2m_buf_prepare,
- .buf_queue = vim2m_buf_queue,
- .start_streaming = vim2m_start_streaming,
- .stop_streaming = vim2m_stop_streaming,
- .wait_prepare = vb2_ops_wait_prepare,
- .wait_finish = vb2_ops_wait_finish,
- .buf_request_complete = vim2m_buf_request_complete,
- };
- static int queue_init(void *priv, struct vb2_queue *src_vq,
- struct vb2_queue *dst_vq)
- {
- struct vim2m_ctx *ctx = priv;
- int ret;
- src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
- src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
- src_vq->drv_priv = ctx;
- src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
- src_vq->ops = &vim2m_qops;
- src_vq->mem_ops = &vb2_vmalloc_memops;
- src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
- src_vq->lock = &ctx->vb_mutex;
- src_vq->supports_requests = true;
- ret = vb2_queue_init(src_vq);
- if (ret)
- return ret;
- dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
- dst_vq->drv_priv = ctx;
- dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
- dst_vq->ops = &vim2m_qops;
- dst_vq->mem_ops = &vb2_vmalloc_memops;
- dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
- dst_vq->lock = &ctx->vb_mutex;
- return vb2_queue_init(dst_vq);
- }
- static struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
- .ops = &vim2m_ctrl_ops,
- .id = V4L2_CID_TRANS_TIME_MSEC,
- .name = "Transaction Time (msec)",
- .type = V4L2_CTRL_TYPE_INTEGER,
- .min = 1,
- .max = 10001,
- .step = 1,
- };
- static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
- .ops = &vim2m_ctrl_ops,
- .id = V4L2_CID_TRANS_NUM_BUFS,
- .name = "Buffers Per Transaction",
- .type = V4L2_CTRL_TYPE_INTEGER,
- .def = 1,
- .min = 1,
- .max = MEM2MEM_DEF_NUM_BUFS,
- .step = 1,
- };
- /*
- * File operations
- */
- static int vim2m_open(struct file *file)
- {
- struct vim2m_dev *dev = video_drvdata(file);
- struct vim2m_ctx *ctx = NULL;
- struct v4l2_ctrl_handler *hdl;
- int rc = 0;
- if (mutex_lock_interruptible(&dev->dev_mutex))
- return -ERESTARTSYS;
- ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
- if (!ctx) {
- rc = -ENOMEM;
- goto open_unlock;
- }
- v4l2_fh_init(&ctx->fh, video_devdata(file));
- file->private_data = &ctx->fh;
- ctx->dev = dev;
- hdl = &ctx->hdl;
- v4l2_ctrl_handler_init(hdl, 4);
- v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
- v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
- vim2m_ctrl_trans_time_msec.def = default_transtime;
- v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
- v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
- if (hdl->error) {
- rc = hdl->error;
- v4l2_ctrl_handler_free(hdl);
- kfree(ctx);
- goto open_unlock;
- }
- ctx->fh.ctrl_handler = hdl;
- v4l2_ctrl_handler_setup(hdl);
- ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0];
- ctx->q_data[V4L2_M2M_SRC].width = 640;
- ctx->q_data[V4L2_M2M_SRC].height = 480;
- ctx->q_data[V4L2_M2M_SRC].sizeimage =
- ctx->q_data[V4L2_M2M_SRC].width *
- ctx->q_data[V4L2_M2M_SRC].height *
- (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3);
- ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC];
- ctx->colorspace = V4L2_COLORSPACE_REC709;
- ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
- mutex_init(&ctx->vb_mutex);
- spin_lock_init(&ctx->irqlock);
- INIT_DELAYED_WORK(&ctx->work_run, device_work);
- if (IS_ERR(ctx->fh.m2m_ctx)) {
- rc = PTR_ERR(ctx->fh.m2m_ctx);
- v4l2_ctrl_handler_free(hdl);
- v4l2_fh_exit(&ctx->fh);
- kfree(ctx);
- goto open_unlock;
- }
- v4l2_fh_add(&ctx->fh);
- atomic_inc(&dev->num_inst);
- dprintk(dev, 1, "Created instance: %p, m2m_ctx: %p\n",
- ctx, ctx->fh.m2m_ctx);
- open_unlock:
- mutex_unlock(&dev->dev_mutex);
- return rc;
- }
- static int vim2m_release(struct file *file)
- {
- struct vim2m_dev *dev = video_drvdata(file);
- struct vim2m_ctx *ctx = file2ctx(file);
- dprintk(dev, 1, "Releasing instance %p\n", ctx);
- v4l2_fh_del(&ctx->fh);
- v4l2_fh_exit(&ctx->fh);
- v4l2_ctrl_handler_free(&ctx->hdl);
- mutex_lock(&dev->dev_mutex);
- v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
- mutex_unlock(&dev->dev_mutex);
- kfree(ctx);
- atomic_dec(&dev->num_inst);
- return 0;
- }
- static void vim2m_device_release(struct video_device *vdev)
- {
- struct vim2m_dev *dev = container_of(vdev, struct vim2m_dev, vfd);
- v4l2_device_unregister(&dev->v4l2_dev);
- v4l2_m2m_release(dev->m2m_dev);
- #ifdef CONFIG_MEDIA_CONTROLLER
- media_device_cleanup(&dev->mdev);
- #endif
- kfree(dev);
- }
- static const struct v4l2_file_operations vim2m_fops = {
- .owner = THIS_MODULE,
- .open = vim2m_open,
- .release = vim2m_release,
- .poll = v4l2_m2m_fop_poll,
- .unlocked_ioctl = video_ioctl2,
- .mmap = v4l2_m2m_fop_mmap,
- };
- static const struct video_device vim2m_videodev = {
- .name = MEM2MEM_NAME,
- .vfl_dir = VFL_DIR_M2M,
- .fops = &vim2m_fops,
- .ioctl_ops = &vim2m_ioctl_ops,
- .minor = -1,
- .release = vim2m_device_release,
- .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
- };
- static const struct v4l2_m2m_ops m2m_ops = {
- .device_run = device_run,
- .job_ready = job_ready,
- .job_abort = job_abort,
- };
- static const struct media_device_ops m2m_media_ops = {
- .req_validate = vb2_request_validate,
- .req_queue = v4l2_m2m_request_queue,
- };
- static int vim2m_probe(struct platform_device *pdev)
- {
- struct vim2m_dev *dev;
- struct video_device *vfd;
- int ret;
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
- ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
- if (ret)
- goto error_free;
- atomic_set(&dev->num_inst, 0);
- mutex_init(&dev->dev_mutex);
- dev->vfd = vim2m_videodev;
- vfd = &dev->vfd;
- vfd->lock = &dev->dev_mutex;
- vfd->v4l2_dev = &dev->v4l2_dev;
- ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
- if (ret) {
- v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
- goto error_v4l2;
- }
- video_set_drvdata(vfd, dev);
- v4l2_info(&dev->v4l2_dev,
- "Device registered as /dev/video%d\n", vfd->num);
- platform_set_drvdata(pdev, dev);
- dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
- if (IS_ERR(dev->m2m_dev)) {
- v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
- ret = PTR_ERR(dev->m2m_dev);
- dev->m2m_dev = NULL;
- goto error_dev;
- }
- #ifdef CONFIG_MEDIA_CONTROLLER
- dev->mdev.dev = &pdev->dev;
- strscpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model));
- strscpy(dev->mdev.bus_info, "platform:vim2m",
- sizeof(dev->mdev.bus_info));
- media_device_init(&dev->mdev);
- dev->mdev.ops = &m2m_media_ops;
- dev->v4l2_dev.mdev = &dev->mdev;
- ret = v4l2_m2m_register_media_controller(dev->m2m_dev, vfd,
- MEDIA_ENT_F_PROC_VIDEO_SCALER);
- if (ret) {
- v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
- goto error_dev;
- }
- ret = media_device_register(&dev->mdev);
- if (ret) {
- v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
- goto error_m2m_mc;
- }
- #endif
- return 0;
- #ifdef CONFIG_MEDIA_CONTROLLER
- error_m2m_mc:
- v4l2_m2m_unregister_media_controller(dev->m2m_dev);
- #endif
- error_dev:
- video_unregister_device(&dev->vfd);
- /* vim2m_device_release called by video_unregister_device to release various objects */
- return ret;
- error_v4l2:
- v4l2_device_unregister(&dev->v4l2_dev);
- error_free:
- kfree(dev);
- return ret;
- }
- static int vim2m_remove(struct platform_device *pdev)
- {
- struct vim2m_dev *dev = platform_get_drvdata(pdev);
- v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
- #ifdef CONFIG_MEDIA_CONTROLLER
- media_device_unregister(&dev->mdev);
- v4l2_m2m_unregister_media_controller(dev->m2m_dev);
- #endif
- video_unregister_device(&dev->vfd);
- return 0;
- }
- static struct platform_driver vim2m_pdrv = {
- .probe = vim2m_probe,
- .remove = vim2m_remove,
- .driver = {
- .name = MEM2MEM_NAME,
- },
- };
- static void __exit vim2m_exit(void)
- {
- platform_driver_unregister(&vim2m_pdrv);
- platform_device_unregister(&vim2m_pdev);
- }
- static int __init vim2m_init(void)
- {
- int ret;
- ret = platform_device_register(&vim2m_pdev);
- if (ret)
- return ret;
- ret = platform_driver_register(&vim2m_pdrv);
- if (ret)
- platform_device_unregister(&vim2m_pdev);
- return ret;
- }
- module_init(vim2m_init);
- module_exit(vim2m_exit);
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