linux/drivers/media/platform/mx2_emmaprp.c
Linus Torvalds e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00

1011 lines
26 KiB
C

/*
* Support eMMa-PrP through mem2mem framework.
*
* eMMa-PrP is a piece of HW that allows fetching buffers
* from one memory location and do several operations on
* them such as scaling or format conversion giving, as a result
* a new processed buffer in another memory location.
*
* Based on mem2mem_testdev.c by Pawel Osciak.
*
* Copyright (c) 2011 Vista Silicon S.L.
* Javier Martin <javier.martin@vista-silicon.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/clk.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-dma-contig.h>
#include <linux/sizes.h>
#define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.0.1");
static bool debug;
module_param(debug, bool, 0644);
#define MIN_W 32
#define MIN_H 32
#define MAX_W 2040
#define MAX_H 2046
#define S_ALIGN 1 /* multiple of 2 */
#define W_ALIGN_YUV420 3 /* multiple of 8 */
#define W_ALIGN_OTHERS 2 /* multiple of 4 */
#define H_ALIGN 1 /* multiple of 2 */
/* Flags that indicate a format can be used for capture/output */
#define MEM2MEM_CAPTURE (1 << 0)
#define MEM2MEM_OUTPUT (1 << 1)
#define MEM2MEM_NAME "m2m-emmaprp"
/* In bytes, per queue */
#define MEM2MEM_VID_MEM_LIMIT SZ_16M
#define dprintk(dev, fmt, arg...) \
v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
/* EMMA PrP */
#define PRP_CNTL 0x00
#define PRP_INTR_CNTL 0x04
#define PRP_INTRSTATUS 0x08
#define PRP_SOURCE_Y_PTR 0x0c
#define PRP_SOURCE_CB_PTR 0x10
#define PRP_SOURCE_CR_PTR 0x14
#define PRP_DEST_RGB1_PTR 0x18
#define PRP_DEST_RGB2_PTR 0x1c
#define PRP_DEST_Y_PTR 0x20
#define PRP_DEST_CB_PTR 0x24
#define PRP_DEST_CR_PTR 0x28
#define PRP_SRC_FRAME_SIZE 0x2c
#define PRP_DEST_CH1_LINE_STRIDE 0x30
#define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
#define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
#define PRP_CH1_OUT_IMAGE_SIZE 0x3c
#define PRP_CH2_OUT_IMAGE_SIZE 0x40
#define PRP_SRC_LINE_STRIDE 0x44
#define PRP_CSC_COEF_012 0x48
#define PRP_CSC_COEF_345 0x4c
#define PRP_CSC_COEF_678 0x50
#define PRP_CH1_RZ_HORI_COEF1 0x54
#define PRP_CH1_RZ_HORI_COEF2 0x58
#define PRP_CH1_RZ_HORI_VALID 0x5c
#define PRP_CH1_RZ_VERT_COEF1 0x60
#define PRP_CH1_RZ_VERT_COEF2 0x64
#define PRP_CH1_RZ_VERT_VALID 0x68
#define PRP_CH2_RZ_HORI_COEF1 0x6c
#define PRP_CH2_RZ_HORI_COEF2 0x70
#define PRP_CH2_RZ_HORI_VALID 0x74
#define PRP_CH2_RZ_VERT_COEF1 0x78
#define PRP_CH2_RZ_VERT_COEF2 0x7c
#define PRP_CH2_RZ_VERT_VALID 0x80
#define PRP_CNTL_CH1EN (1 << 0)
#define PRP_CNTL_CH2EN (1 << 1)
#define PRP_CNTL_CSIEN (1 << 2)
#define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
#define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
#define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
#define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
#define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
#define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
#define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
#define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
#define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
#define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
#define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
#define PRP_CNTL_CH1_LEN (1 << 9)
#define PRP_CNTL_CH2_LEN (1 << 10)
#define PRP_CNTL_SKIP_FRAME (1 << 11)
#define PRP_CNTL_SWRST (1 << 12)
#define PRP_CNTL_CLKEN (1 << 13)
#define PRP_CNTL_WEN (1 << 14)
#define PRP_CNTL_CH1BYP (1 << 15)
#define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
#define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
#define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
#define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
#define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
#define PRP_CNTL_CH2B1EN (1 << 29)
#define PRP_CNTL_CH2B2EN (1 << 30)
#define PRP_CNTL_CH2FEN (1 << 31)
#define PRP_SIZE_HEIGHT(x) (x)
#define PRP_SIZE_WIDTH(x) ((x) << 16)
/* IRQ Enable and status register */
#define PRP_INTR_RDERR (1 << 0)
#define PRP_INTR_CH1WERR (1 << 1)
#define PRP_INTR_CH2WERR (1 << 2)
#define PRP_INTR_CH1FC (1 << 3)
#define PRP_INTR_CH2FC (1 << 5)
#define PRP_INTR_LBOVF (1 << 7)
#define PRP_INTR_CH2OVF (1 << 8)
#define PRP_INTR_ST_RDERR (1 << 0)
#define PRP_INTR_ST_CH1WERR (1 << 1)
#define PRP_INTR_ST_CH2WERR (1 << 2)
#define PRP_INTR_ST_CH2B2CI (1 << 3)
#define PRP_INTR_ST_CH2B1CI (1 << 4)
#define PRP_INTR_ST_CH1B2CI (1 << 5)
#define PRP_INTR_ST_CH1B1CI (1 << 6)
#define PRP_INTR_ST_LBOVF (1 << 7)
#define PRP_INTR_ST_CH2OVF (1 << 8)
struct emmaprp_fmt {
char *name;
u32 fourcc;
/* Types the format can be used for */
u32 types;
};
static struct emmaprp_fmt formats[] = {
{
.name = "YUV 4:2:0 Planar",
.fourcc = V4L2_PIX_FMT_YUV420,
.types = MEM2MEM_CAPTURE,
},
{
.name = "4:2:2, packed, YUYV",
.fourcc = V4L2_PIX_FMT_YUYV,
.types = MEM2MEM_OUTPUT,
},
};
/* Per-queue, driver-specific private data */
struct emmaprp_q_data {
unsigned int width;
unsigned int height;
unsigned int sizeimage;
struct emmaprp_fmt *fmt;
};
enum {
V4L2_M2M_SRC = 0,
V4L2_M2M_DST = 1,
};
#define NUM_FORMATS ARRAY_SIZE(formats)
static struct emmaprp_fmt *find_format(struct v4l2_format *f)
{
struct emmaprp_fmt *fmt;
unsigned int k;
for (k = 0; k < NUM_FORMATS; k++) {
fmt = &formats[k];
if (fmt->fourcc == f->fmt.pix.pixelformat)
break;
}
if (k == NUM_FORMATS)
return NULL;
return &formats[k];
}
struct emmaprp_dev {
struct v4l2_device v4l2_dev;
struct video_device *vfd;
struct mutex dev_mutex;
spinlock_t irqlock;
void __iomem *base_emma;
struct clk *clk_emma_ahb, *clk_emma_ipg;
struct v4l2_m2m_dev *m2m_dev;
struct vb2_alloc_ctx *alloc_ctx;
};
struct emmaprp_ctx {
struct emmaprp_dev *dev;
/* Abort requested by m2m */
int aborting;
struct emmaprp_q_data q_data[2];
struct v4l2_m2m_ctx *m2m_ctx;
};
static struct emmaprp_q_data *get_q_data(struct emmaprp_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:
BUG();
}
return NULL;
}
/*
* mem2mem callbacks
*/
static void emmaprp_job_abort(void *priv)
{
struct emmaprp_ctx *ctx = priv;
struct emmaprp_dev *pcdev = ctx->dev;
ctx->aborting = 1;
dprintk(pcdev, "Aborting task\n");
v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
}
static void emmaprp_lock(void *priv)
{
struct emmaprp_ctx *ctx = priv;
struct emmaprp_dev *pcdev = ctx->dev;
mutex_lock(&pcdev->dev_mutex);
}
static void emmaprp_unlock(void *priv)
{
struct emmaprp_ctx *ctx = priv;
struct emmaprp_dev *pcdev = ctx->dev;
mutex_unlock(&pcdev->dev_mutex);
}
static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
{
dprintk(pcdev,
"eMMa-PrP Registers:\n"
" SOURCE_Y_PTR = 0x%08X\n"
" SRC_FRAME_SIZE = 0x%08X\n"
" DEST_Y_PTR = 0x%08X\n"
" DEST_CR_PTR = 0x%08X\n"
" DEST_CB_PTR = 0x%08X\n"
" CH2_OUT_IMAGE_SIZE = 0x%08X\n"
" CNTL = 0x%08X\n",
readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
readl(pcdev->base_emma + PRP_DEST_Y_PTR),
readl(pcdev->base_emma + PRP_DEST_CR_PTR),
readl(pcdev->base_emma + PRP_DEST_CB_PTR),
readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
readl(pcdev->base_emma + PRP_CNTL));
}
static void emmaprp_device_run(void *priv)
{
struct emmaprp_ctx *ctx = priv;
struct emmaprp_q_data *s_q_data, *d_q_data;
struct vb2_buffer *src_buf, *dst_buf;
struct emmaprp_dev *pcdev = ctx->dev;
unsigned int s_width, s_height;
unsigned int d_width, d_height;
unsigned int d_size;
dma_addr_t p_in, p_out;
u32 tmp;
src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
s_width = s_q_data->width;
s_height = s_q_data->height;
d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
d_width = d_q_data->width;
d_height = d_q_data->height;
d_size = d_width * d_height;
p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0);
p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
if (!p_in || !p_out) {
v4l2_err(&pcdev->v4l2_dev,
"Acquiring kernel pointers to buffers failed\n");
return;
}
/* Input frame parameters */
writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
pcdev->base_emma + PRP_SRC_FRAME_SIZE);
/* Output frame parameters */
writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
writel(p_out + d_size + (d_size >> 2),
pcdev->base_emma + PRP_DEST_CR_PTR);
writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
/* IRQ configuration */
tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
writel(tmp | PRP_INTR_RDERR |
PRP_INTR_CH2WERR |
PRP_INTR_CH2FC,
pcdev->base_emma + PRP_INTR_CNTL);
emmaprp_dump_regs(pcdev);
/* Enable transfer */
tmp = readl(pcdev->base_emma + PRP_CNTL);
writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
PRP_CNTL_DATA_IN_YUV422 |
PRP_CNTL_CH2EN,
pcdev->base_emma + PRP_CNTL);
}
static irqreturn_t emmaprp_irq(int irq_emma, void *data)
{
struct emmaprp_dev *pcdev = data;
struct emmaprp_ctx *curr_ctx;
struct vb2_buffer *src_vb, *dst_vb;
unsigned long flags;
u32 irqst;
/* Check irq flags and clear irq */
irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
dprintk(pcdev, "irqst = 0x%08x\n", irqst);
curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
if (curr_ctx == NULL) {
pr_err("Instance released before the end of transaction\n");
return IRQ_HANDLED;
}
if (!curr_ctx->aborting) {
if ((irqst & PRP_INTR_ST_RDERR) ||
(irqst & PRP_INTR_ST_CH2WERR)) {
pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
} else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
dst_vb->v4l2_buf.flags &=
~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
dst_vb->v4l2_buf.flags |=
src_vb->v4l2_buf.flags
& V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
dst_vb->v4l2_buf.timecode = src_vb->v4l2_buf.timecode;
spin_lock_irqsave(&pcdev->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(&pcdev->irqlock, flags);
}
}
v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
return IRQ_HANDLED;
}
/*
* video ioctls
*/
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
{
int i, num;
struct emmaprp_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];
strlcpy(f->description, fmt->name, sizeof(f->description) - 1);
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_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
{
struct vb2_queue *vq;
struct emmaprp_q_data *q_data;
vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
if (!vq)
return -EINVAL;
q_data = get_q_data(ctx, f->type);
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;
if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
f->fmt.pix.bytesperline = q_data->width * 3 / 2;
else /* YUYV */
f->fmt.pix.bytesperline = q_data->width * 2;
f->fmt.pix.sizeimage = q_data->sizeimage;
return 0;
}
static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
return vidioc_g_fmt(priv, f);
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
return vidioc_g_fmt(priv, f);
}
static int vidioc_try_fmt(struct v4l2_format *f)
{
enum v4l2_field field;
if (!find_format(f))
return -EINVAL;
field = f->fmt.pix.field;
if (field == V4L2_FIELD_ANY)
field = V4L2_FIELD_NONE;
else if (V4L2_FIELD_NONE != field)
return -EINVAL;
/* V4L2 specification suggests the driver corrects the format struct
* if any of the dimensions is unsupported */
f->fmt.pix.field = field;
if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
W_ALIGN_YUV420, &f->fmt.pix.height,
MIN_H, MAX_H, H_ALIGN, S_ALIGN);
f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
} else {
v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
W_ALIGN_OTHERS, &f->fmt.pix.height,
MIN_H, MAX_H, H_ALIGN, S_ALIGN);
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
}
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
return 0;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct emmaprp_fmt *fmt;
struct emmaprp_ctx *ctx = priv;
fmt = find_format(f);
if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
v4l2_err(&ctx->dev->v4l2_dev,
"Fourcc format (0x%08x) invalid.\n",
f->fmt.pix.pixelformat);
return -EINVAL;
}
return vidioc_try_fmt(f);
}
static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct emmaprp_fmt *fmt;
struct emmaprp_ctx *ctx = priv;
fmt = find_format(f);
if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
v4l2_err(&ctx->dev->v4l2_dev,
"Fourcc format (0x%08x) invalid.\n",
f->fmt.pix.pixelformat);
return -EINVAL;
}
return vidioc_try_fmt(f);
}
static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
{
struct emmaprp_q_data *q_data;
struct vb2_queue *vq;
int ret;
vq = v4l2_m2m_get_vq(ctx->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;
}
ret = vidioc_try_fmt(f);
if (ret)
return ret;
q_data->fmt = find_format(f);
q_data->width = f->fmt.pix.width;
q_data->height = f->fmt.pix.height;
if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
else /* YUYV */
q_data->sizeimage = q_data->width * q_data->height * 2;
dprintk(ctx->dev,
"Setting format for type %d, wxh: %dx%d, fmt: %d\n",
f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
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(priv, f);
}
static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
int ret;
ret = vidioc_try_fmt_vid_out(file, priv, f);
if (ret)
return ret;
return vidioc_s_fmt(priv, f);
}
static int vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct emmaprp_ctx *ctx = priv;
return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
}
static int vidioc_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct emmaprp_ctx *ctx = priv;
return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
}
static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct emmaprp_ctx *ctx = priv;
return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
}
static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct emmaprp_ctx *ctx = priv;
return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
}
static int vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct emmaprp_ctx *ctx = priv;
return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
}
static int vidioc_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct emmaprp_ctx *ctx = priv;
return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
}
static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_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 = vidioc_reqbufs,
.vidioc_querybuf = vidioc_querybuf,
.vidioc_qbuf = vidioc_qbuf,
.vidioc_dqbuf = vidioc_dqbuf,
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
};
/*
* Queue operations
*/
static int emmaprp_queue_setup(struct vb2_queue *vq,
const struct v4l2_format *fmt,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
struct emmaprp_q_data *q_data;
unsigned int size, count = *nbuffers;
q_data = get_q_data(ctx, vq->type);
if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
size = q_data->width * q_data->height * 3 / 2;
else
size = q_data->width * q_data->height * 2;
while (size * count > MEM2MEM_VID_MEM_LIMIT)
(count)--;
*nplanes = 1;
*nbuffers = count;
sizes[0] = size;
alloc_ctxs[0] = ctx->dev->alloc_ctx;
dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
return 0;
}
static int emmaprp_buf_prepare(struct vb2_buffer *vb)
{
struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct emmaprp_q_data *q_data;
dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
q_data = get_q_data(ctx, vb->vb2_queue->type);
if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
dprintk(ctx->dev, "%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 emmaprp_buf_queue(struct vb2_buffer *vb)
{
struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
}
static struct vb2_ops emmaprp_qops = {
.queue_setup = emmaprp_queue_setup,
.buf_prepare = emmaprp_buf_prepare,
.buf_queue = emmaprp_buf_queue,
};
static int queue_init(void *priv, struct vb2_queue *src_vq,
struct vb2_queue *dst_vq)
{
struct emmaprp_ctx *ctx = priv;
int ret;
src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
src_vq->drv_priv = ctx;
src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
src_vq->ops = &emmaprp_qops;
src_vq->mem_ops = &vb2_dma_contig_memops;
src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
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;
dst_vq->drv_priv = ctx;
dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
dst_vq->ops = &emmaprp_qops;
dst_vq->mem_ops = &vb2_dma_contig_memops;
dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
return vb2_queue_init(dst_vq);
}
/*
* File operations
*/
static int emmaprp_open(struct file *file)
{
struct emmaprp_dev *pcdev = video_drvdata(file);
struct emmaprp_ctx *ctx;
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
if (!ctx)
return -ENOMEM;
file->private_data = ctx;
ctx->dev = pcdev;
if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
kfree(ctx);
return -ERESTARTSYS;
}
ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
if (IS_ERR(ctx->m2m_ctx)) {
int ret = PTR_ERR(ctx->m2m_ctx);
mutex_unlock(&pcdev->dev_mutex);
kfree(ctx);
return ret;
}
clk_prepare_enable(pcdev->clk_emma_ipg);
clk_prepare_enable(pcdev->clk_emma_ahb);
ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
mutex_unlock(&pcdev->dev_mutex);
dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
return 0;
}
static int emmaprp_release(struct file *file)
{
struct emmaprp_dev *pcdev = video_drvdata(file);
struct emmaprp_ctx *ctx = file->private_data;
dprintk(pcdev, "Releasing instance %p\n", ctx);
mutex_lock(&pcdev->dev_mutex);
clk_disable_unprepare(pcdev->clk_emma_ahb);
clk_disable_unprepare(pcdev->clk_emma_ipg);
v4l2_m2m_ctx_release(ctx->m2m_ctx);
mutex_unlock(&pcdev->dev_mutex);
kfree(ctx);
return 0;
}
static unsigned int emmaprp_poll(struct file *file,
struct poll_table_struct *wait)
{
struct emmaprp_dev *pcdev = video_drvdata(file);
struct emmaprp_ctx *ctx = file->private_data;
unsigned int res;
mutex_lock(&pcdev->dev_mutex);
res = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
mutex_unlock(&pcdev->dev_mutex);
return res;
}
static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma)
{
struct emmaprp_dev *pcdev = video_drvdata(file);
struct emmaprp_ctx *ctx = file->private_data;
int ret;
if (mutex_lock_interruptible(&pcdev->dev_mutex))
return -ERESTARTSYS;
ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
mutex_unlock(&pcdev->dev_mutex);
return ret;
}
static const struct v4l2_file_operations emmaprp_fops = {
.owner = THIS_MODULE,
.open = emmaprp_open,
.release = emmaprp_release,
.poll = emmaprp_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = emmaprp_mmap,
};
static struct video_device emmaprp_videodev = {
.name = MEM2MEM_NAME,
.fops = &emmaprp_fops,
.ioctl_ops = &emmaprp_ioctl_ops,
.minor = -1,
.release = video_device_release,
.vfl_dir = VFL_DIR_M2M,
};
static struct v4l2_m2m_ops m2m_ops = {
.device_run = emmaprp_device_run,
.job_abort = emmaprp_job_abort,
.lock = emmaprp_lock,
.unlock = emmaprp_unlock,
};
static int emmaprp_probe(struct platform_device *pdev)
{
struct emmaprp_dev *pcdev;
struct video_device *vfd;
struct resource *res;
int irq, ret;
pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
if (!pcdev)
return -ENOMEM;
spin_lock_init(&pcdev->irqlock);
pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
if (IS_ERR(pcdev->clk_emma_ipg)) {
return PTR_ERR(pcdev->clk_emma_ipg);
}
pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
if (IS_ERR(pcdev->clk_emma_ahb))
return PTR_ERR(pcdev->clk_emma_ahb);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pcdev->base_emma))
return PTR_ERR(pcdev->base_emma);
ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
if (ret)
return ret;
mutex_init(&pcdev->dev_mutex);
vfd = video_device_alloc();
if (!vfd) {
v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
ret = -ENOMEM;
goto unreg_dev;
}
*vfd = emmaprp_videodev;
vfd->lock = &pcdev->dev_mutex;
vfd->v4l2_dev = &pcdev->v4l2_dev;
video_set_drvdata(vfd, pcdev);
snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name);
pcdev->vfd = vfd;
v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
" Device registered as /dev/video%d\n", vfd->num);
platform_set_drvdata(pdev, pcdev);
irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
dev_name(&pdev->dev), pcdev);
if (ret)
goto rel_vdev;
pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
if (IS_ERR(pcdev->alloc_ctx)) {
v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
ret = PTR_ERR(pcdev->alloc_ctx);
goto rel_vdev;
}
pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
if (IS_ERR(pcdev->m2m_dev)) {
v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
ret = PTR_ERR(pcdev->m2m_dev);
goto rel_ctx;
}
ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
if (ret) {
v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
goto rel_m2m;
}
return 0;
rel_m2m:
v4l2_m2m_release(pcdev->m2m_dev);
rel_ctx:
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
rel_vdev:
video_device_release(vfd);
unreg_dev:
v4l2_device_unregister(&pcdev->v4l2_dev);
mutex_destroy(&pcdev->dev_mutex);
return ret;
}
static int emmaprp_remove(struct platform_device *pdev)
{
struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
video_unregister_device(pcdev->vfd);
v4l2_m2m_release(pcdev->m2m_dev);
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
v4l2_device_unregister(&pcdev->v4l2_dev);
mutex_destroy(&pcdev->dev_mutex);
return 0;
}
static struct platform_driver emmaprp_pdrv = {
.probe = emmaprp_probe,
.remove = emmaprp_remove,
.driver = {
.name = MEM2MEM_NAME,
},
};
module_platform_driver(emmaprp_pdrv);