/*
* sh-mobile VEU mem2mem driver
*
* Copyright (C) 2012 Renesas Electronics Corporation
* Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
* Copyright (C) 2008 Magnus Damm
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the version 2 of the GNU General Public License as
* published by the Free Software Foundation
*/
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>
#define VEU_STR 0x00 /* start register */
#define VEU_SWR 0x10 /* src: line length */
#define VEU_SSR 0x14 /* src: image size */
#define VEU_SAYR 0x18 /* src: y/rgb plane address */
#define VEU_SACR 0x1c /* src: c plane address */
#define VEU_BSSR 0x20 /* bundle mode register */
#define VEU_EDWR 0x30 /* dst: line length */
#define VEU_DAYR 0x34 /* dst: y/rgb plane address */
#define VEU_DACR 0x38 /* dst: c plane address */
#define VEU_TRCR 0x50 /* transform control */
#define VEU_RFCR 0x54 /* resize scale */
#define VEU_RFSR 0x58 /* resize clip */
#define VEU_ENHR 0x5c /* enhance */
#define VEU_FMCR 0x70 /* filter mode */
#define VEU_VTCR 0x74 /* lowpass vertical */
#define VEU_HTCR 0x78 /* lowpass horizontal */
#define VEU_APCR 0x80 /* color match */
#define VEU_ECCR 0x84 /* color replace */
#define VEU_AFXR 0x90 /* fixed mode */
#define VEU_SWPR 0x94 /* swap */
#define VEU_EIER 0xa0 /* interrupt mask */
#define VEU_EVTR 0xa4 /* interrupt event */
#define VEU_STAR 0xb0 /* status */
#define VEU_BSRR 0xb4 /* reset */
#define VEU_MCR00 0x200 /* color conversion matrix coefficient 00 */
#define VEU_MCR01 0x204 /* color conversion matrix coefficient 01 */
#define VEU_MCR02 0x208 /* color conversion matrix coefficient 02 */
#define VEU_MCR10 0x20c /* color conversion matrix coefficient 10 */
#define VEU_MCR11 0x210 /* color conversion matrix coefficient 11 */
#define VEU_MCR12 0x214 /* color conversion matrix coefficient 12 */
#define VEU_MCR20 0x218 /* color conversion matrix coefficient 20 */
#define VEU_MCR21 0x21c /* color conversion matrix coefficient 21 */
#define VEU_MCR22 0x220 /* color conversion matrix coefficient 22 */
#define VEU_COFFR 0x224 /* color conversion offset */
#define VEU_CBR 0x228 /* color conversion clip */
/*
* 4092x4092 max size is the normal case. In some cases it can be reduced to
* 2048x2048, in other cases it can be 4092x8188 or even 8188x8188.
*/
#define MAX_W 4092
#define MAX_H 4092
#define MIN_W 8
#define MIN_H 8
#define ALIGN_W 4
/* 3 buffers of 2048 x 1536 - 3 megapixels @ 16bpp */
#define VIDEO_MEM_LIMIT ALIGN(2048 * 1536 * 2 * 3, 1024 * 1024)
#define MEM2MEM_DEF_TRANSLEN 1
struct sh_veu_dev;
struct sh_veu_file {
struct sh_veu_dev *veu_dev;
bool cfg_needed;
};
struct sh_veu_format {
char *name;
u32 fourcc;
unsigned int depth;
unsigned int ydepth;
};
/* video data format */
struct sh_veu_vfmt {
/* Replace with v4l2_rect */
struct v4l2_rect frame;
unsigned int bytesperline;
unsigned int offset_y;
unsigned int offset_c;
const struct sh_veu_format *fmt;
};
struct sh_veu_dev {
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct v4l2_m2m_dev *m2m_dev;
struct device *dev;
struct v4l2_m2m_ctx *m2m_ctx;
struct sh_veu_vfmt vfmt_out;
struct sh_veu_vfmt vfmt_in;
/* Only single user per direction so far */
struct sh_veu_file *capture;
struct sh_veu_file *output;
struct mutex fop_lock;
void __iomem *base;
struct vb2_alloc_ctx *alloc_ctx;
spinlock_t lock;
bool is_2h;
unsigned int xaction;
bool aborting;
};
enum sh_veu_fmt_idx {
SH_VEU_FMT_NV12,
SH_VEU_FMT_NV16,
SH_VEU_FMT_NV24,
SH_VEU_FMT_RGB332,
SH_VEU_FMT_RGB444,
SH_VEU_FMT_RGB565,
SH_VEU_FMT_RGB666,
SH_VEU_FMT_RGB24,
};
#define VGA_WIDTH 640
#define VGA_HEIGHT 480
#define DEFAULT_IN_WIDTH VGA_WIDTH
#define DEFAULT_IN_HEIGHT VGA_HEIGHT
#define DEFAULT_IN_FMTIDX SH_VEU_FMT_NV12
#define DEFAULT_OUT_WIDTH VGA_WIDTH
#define DEFAULT_OUT_HEIGHT VGA_HEIGHT
#define DEFAULT_OUT_FMTIDX SH_VEU_FMT_RGB565
/*
* Alignment: Y-plane should be 4-byte aligned for NV12 and NV16, and 8-byte
* aligned for NV24.
*/
static const struct sh_veu_format sh_veu_fmt[] = {
[SH_VEU_FMT_NV12] = { .ydepth = 8, .depth = 12, .name = "NV12", .fourcc = V4L2_PIX_FMT_NV12 },
[SH_VEU_FMT_NV16] = { .ydepth = 8, .depth = 16, .name = "NV16", .fourcc = V4L2_PIX_FMT_NV16 },
[SH_VEU_FMT_NV24] = { .ydepth = 8, .depth = 24, .name = "NV24", .fourcc = V4L2_PIX_FMT_NV24 },
[SH_VEU_FMT_RGB332] = { .ydepth = 8, .depth = 8, .name = "RGB332", .fourcc = V4L2_PIX_FMT_RGB332 },
[SH_VEU_FMT_RGB444] = { .ydepth = 16, .depth = 16, .name = "RGB444", .fourcc = V4L2_PIX_FMT_RGB444 },
[SH_VEU_FMT_RGB565] = { .ydepth = 16, .depth = 16, .name = "RGB565", .fourcc = V4L2_PIX_FMT_RGB565 },
[SH_VEU_FMT_RGB666] = { .ydepth = 32, .depth = 32, .name = "BGR666", .fourcc = V4L2_PIX_FMT_BGR666 },
[SH_VEU_FMT_RGB24] = { .ydepth = 24, .depth = 24, .name = "RGB24", .fourcc = V4L2_PIX_FMT_RGB24 },
};
#define DEFAULT_IN_VFMT (struct sh_veu_vfmt){ \
.frame = { \
.width = VGA_WIDTH, \
.height = VGA_HEIGHT, \
}, \
.bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_IN_FMTIDX].ydepth) >> 3, \
.fmt = &sh_veu_fmt[DEFAULT_IN_FMTIDX], \
}
#define DEFAULT_OUT_VFMT (struct sh_veu_vfmt){ \
.frame = { \
.width = VGA_WIDTH, \
.height = VGA_HEIGHT, \
}, \
.bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_OUT_FMTIDX].ydepth) >> 3, \
.fmt = &sh_veu_fmt[DEFAULT_OUT_FMTIDX], \
}
/*
* TODO: add support for further output formats:
* SH_VEU_FMT_NV12,
* SH_VEU_FMT_NV16,
* SH_VEU_FMT_NV24,
* SH_VEU_FMT_RGB332,
* SH_VEU_FMT_RGB444,
* SH_VEU_FMT_RGB666,
* SH_VEU_FMT_RGB24,
*/
static const int sh_veu_fmt_out[] = {
SH_VEU_FMT_RGB565,
};
/*
* TODO: add support for further input formats:
* SH_VEU_FMT_NV16,
* SH_VEU_FMT_NV24,
* SH_VEU_FMT_RGB565,
* SH_VEU_FMT_RGB666,
* SH_VEU_FMT_RGB24,
*/
static const int sh_veu_fmt_in[] = {
SH_VEU_FMT_NV12,
};
static enum v4l2_colorspace sh_veu_4cc2cspace(u32 fourcc)
{
switch (fourcc) {
default:
BUG();
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV24:
return V4L2_COLORSPACE_JPEG;
case V4L2_PIX_FMT_RGB332:
case V4L2_PIX_FMT_RGB444:
case V4L2_PIX_FMT_RGB565:
case V4L2_PIX_FMT_BGR666:
case V4L2_PIX_FMT_RGB24:
return V4L2_COLORSPACE_SRGB;
}
}
static u32 sh_veu_reg_read(struct sh_veu_dev *veu, unsigned int reg)
{
return ioread32(veu->base + reg);
}
static void sh_veu_reg_write(struct sh_veu_dev *veu, unsigned int reg,
u32 value)
{
iowrite32(value, veu->base + reg);
}
/* ========== mem2mem callbacks ========== */
static void sh_veu_job_abort(void *priv)
{
struct sh_veu_dev *veu = priv;
/* Will cancel the transaction in the next interrupt handler */
veu->aborting = true;
}
static void sh_veu_lock(void *priv)
{
struct sh_veu_dev *veu = priv;
mutex_lock(&veu->fop_lock);
}
static void sh_veu_unlock(void *priv)
{
struct sh_veu_dev *veu = priv;
mutex_unlock(&veu->fop_lock);
}
static void sh_veu_process(struct sh_veu_dev *veu,
struct vb2_buffer *src_buf,
struct vb2_buffer *dst_buf)
{
dma_addr_t addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
sh_veu_reg_write(veu, VEU_DAYR, addr + veu->vfmt_out.offset_y);
sh_veu_reg_write(veu, VEU_DACR, veu->vfmt_out.offset_c ?
addr + veu->vfmt_out.offset_c : 0);
dev_dbg(veu->dev, "%s(): dst base %lx, y: %x, c: %x\n", __func__,
(unsigned long)addr,
veu->vfmt_out.offset_y, veu->vfmt_out.offset_c);
addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
sh_veu_reg_write(veu, VEU_SAYR, addr + veu->vfmt_in.offset_y);
sh_veu_reg_write(veu, VEU_SACR, veu->vfmt_in.offset_c ?
addr + veu->vfmt_in.offset_c : 0);
dev_dbg(veu->dev, "%s(): src base %lx, y: %x, c: %x\n", __func__,
(unsigned long)addr,
veu->vfmt_in.offset_y, veu->vfmt_in.offset_c);
sh_veu_reg_write(veu, VEU_STR, 1);
sh_veu_reg_write(veu, VEU_EIER, 1); /* enable interrupt in VEU */
}
/**
* sh_veu_device_run() - prepares and starts the device
*
* This will be called by the framework when it decides to schedule a particular
* instance.
*/
static void sh_veu_device_run(void *priv)
{
struct sh_veu_dev *veu = priv;
struct vb2_buffer *src_buf, *dst_buf;
src_buf = v4l2_m2m_next_src_buf(veu->m2m_ctx);
dst_buf = v4l2_m2m_next_dst_buf(veu->m2m_ctx);
if (src_buf && dst_buf)
sh_veu_process(veu, src_buf, dst_buf);
}
/* ========== video ioctls ========== */
static bool sh_veu_is_streamer(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
enum v4l2_buf_type type)
{
return (type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
veu_file == veu->capture) ||
(type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
veu_file == veu->output);
}
static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
struct vb2_queue *dst_vq);
/*
* It is not unusual to have video nodes open()ed multiple times. While some
* V4L2 operations are non-intrusive, like querying formats and various
* parameters, others, like setting formats, starting and stopping streaming,
* queuing and dequeuing buffers, directly affect hardware configuration and /
* or execution. This function verifies availability of the requested interface
* and, if available, reserves it for the requesting user.
*/
static int sh_veu_stream_init(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
enum v4l2_buf_type type)
{
struct sh_veu_file **stream;
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
stream = &veu->capture;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
stream = &veu->output;
break;
default:
return -EINVAL;
}
if (*stream == veu_file)
return 0;
if (*stream)
return -EBUSY;
*stream = veu_file;
return 0;
}
static int sh_veu_context_init(struct sh_veu_dev *veu)
{
if (veu->m2m_ctx)
return 0;
veu->m2m_ctx = v4l2_m2m_ctx_init(veu->m2m_dev, veu,
sh_veu_queue_init);
if (IS_ERR(veu->m2m_ctx))
return PTR_ERR(veu->m2m_ctx);
return 0;
}
static int sh_veu_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strlcpy(cap->driver, "sh-veu", sizeof(cap->driver));
strlcpy(cap->card, "sh-mobile VEU", sizeof(cap->card));
strlcpy(cap->bus_info, "platform:sh-veu", sizeof(cap->bus_info));
cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int sh_veu_enum_fmt(struct v4l2_fmtdesc *f, const int *fmt, int fmt_num)
{
if (f->index >= fmt_num)
return -EINVAL;
strlcpy(f->description, sh_veu_fmt[fmt[f->index]].name, sizeof(f->description));
f->pixelformat = sh_veu_fmt[fmt[f->index]].fourcc;
return 0;
}
static int sh_veu_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
return sh_veu_enum_fmt(f, sh_veu_fmt_out, ARRAY_SIZE(sh_veu_fmt_out));
}
static int sh_veu_enum_fmt_vid_out(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
return sh_veu_enum_fmt(f, sh_veu_fmt_in, ARRAY_SIZE(sh_veu_fmt_in));
}
static struct sh_veu_vfmt *sh_veu_get_vfmt(struct sh_veu_dev *veu,
enum v4l2_buf_type type)
{
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
return &veu->vfmt_out;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
return &veu->vfmt_in;
default:
return NULL;
}
}
static int sh_veu_g_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
struct sh_veu_dev *veu = veu_file->veu_dev;
struct sh_veu_vfmt *vfmt;
vfmt = sh_veu_get_vfmt(veu, f->type);
pix->width = vfmt->frame.width;
pix->height = vfmt->frame.height;
pix->field = V4L2_FIELD_NONE;
pix->pixelformat = vfmt->fmt->fourcc;
pix->colorspace = sh_veu_4cc2cspace(pix->pixelformat);
pix->bytesperline = vfmt->bytesperline;
pix->sizeimage = vfmt->bytesperline * pix->height *
vfmt->fmt->depth / vfmt->fmt->ydepth;
pix->priv = 0;
dev_dbg(veu->dev, "%s(): type: %d, size %u @ %ux%u, fmt %x\n", __func__,
f->type, pix->sizeimage, pix->width, pix->height, pix->pixelformat);
return 0;
}
static int sh_veu_g_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
return sh_veu_g_fmt(priv, f);
}
static int sh_veu_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
return sh_veu_g_fmt(priv, f);
}
static int sh_veu_try_fmt(struct v4l2_format *f, const struct sh_veu_format *fmt)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
unsigned int y_bytes_used;
/*
* V4L2 specification suggests, that the driver should correct the
* format struct if any of the dimensions is unsupported
*/
switch (pix->field) {
default:
case V4L2_FIELD_ANY:
pix->field = V4L2_FIELD_NONE;
/* fall through: continue handling V4L2_FIELD_NONE */
case V4L2_FIELD_NONE:
break;
}
v4l_bound_align_image(&pix->width, MIN_W, MAX_W, ALIGN_W,
&pix->height, MIN_H, MAX_H, 0, 0);
y_bytes_used = (pix->width * fmt->ydepth) >> 3;
if (pix->bytesperline < y_bytes_used)
pix->bytesperline = y_bytes_used;
pix->sizeimage = pix->height * pix->bytesperline * fmt->depth / fmt->ydepth;
pix->pixelformat = fmt->fourcc;
pix->colorspace = sh_veu_4cc2cspace(pix->pixelformat);
pix->priv = 0;
pr_debug("%s(): type: %d, size %u\n", __func__, f->type, pix->sizeimage);
return 0;
}
static const struct sh_veu_format *sh_veu_find_fmt(const struct v4l2_format *f)
{
const int *fmt;
int i, n, dflt;
pr_debug("%s(%d;%d)\n", __func__, f->type, f->fmt.pix.field);
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
fmt = sh_veu_fmt_out;
n = ARRAY_SIZE(sh_veu_fmt_out);
dflt = DEFAULT_OUT_FMTIDX;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
default:
fmt = sh_veu_fmt_in;
n = ARRAY_SIZE(sh_veu_fmt_in);
dflt = DEFAULT_IN_FMTIDX;
break;
}
for (i = 0; i < n; i++)
if (sh_veu_fmt[fmt[i]].fourcc == f->fmt.pix.pixelformat)
return &sh_veu_fmt[fmt[i]];
return &sh_veu_fmt[dflt];
}
static int sh_veu_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
const struct sh_veu_format *fmt;
fmt = sh_veu_find_fmt(f);
if (!fmt)
/* wrong buffer type */
return -EINVAL;
return sh_veu_try_fmt(f, fmt);
}
static int sh_veu_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
const struct sh_veu_format *fmt;
fmt = sh_veu_find_fmt(f);
if (!fmt)
/* wrong buffer type */
return -EINVAL;
return sh_veu_try_fmt(f, fmt);
}
static void sh_veu_colour_offset(struct sh_veu_dev *veu, struct sh_veu_vfmt *vfmt)
{
/* dst_left and dst_top validity will be verified in CROP / COMPOSE */
unsigned int left = vfmt->frame.left & ~0x03;
unsigned int top = vfmt->frame.top;
dma_addr_t offset = ((left * veu->vfmt_out.fmt->depth) >> 3) +
top * veu->vfmt_out.bytesperline;
unsigned int y_line;
vfmt->offset_y = offset;
switch (vfmt->fmt->fourcc) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV24:
y_line = ALIGN(vfmt->frame.width, 16);
vfmt->offset_c = offset + y_line * vfmt->frame.height;
break;
case V4L2_PIX_FMT_RGB332:
case V4L2_PIX_FMT_RGB444:
case V4L2_PIX_FMT_RGB565:
case V4L2_PIX_FMT_BGR666:
case V4L2_PIX_FMT_RGB24:
vfmt->offset_c = 0;
break;
default:
BUG();
}
}
static int sh_veu_s_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
struct sh_veu_dev *veu = veu_file->veu_dev;
struct sh_veu_vfmt *vfmt;
struct vb2_queue *vq;
int ret = sh_veu_context_init(veu);
if (ret < 0)
return ret;
vq = v4l2_m2m_get_vq(veu->m2m_ctx, f->type);
if (!vq)
return -EINVAL;
if (vb2_is_busy(vq)) {
v4l2_err(&veu_file->veu_dev->v4l2_dev, "%s queue busy\n", __func__);
return -EBUSY;
}
vfmt = sh_veu_get_vfmt(veu, f->type);
/* called after try_fmt(), hence vfmt != NULL. Implicit BUG_ON() below */
vfmt->fmt = sh_veu_find_fmt(f);
/* vfmt->fmt != NULL following the same argument as above */
vfmt->frame.width = pix->width;
vfmt->frame.height = pix->height;
vfmt->bytesperline = pix->bytesperline;
sh_veu_colour_offset(veu, vfmt);
/*
* We could also verify and require configuration only if any parameters
* actually have changed, but it is unlikely, that the user requests the
* same configuration several times without closing the device.
*/
veu_file->cfg_needed = true;
dev_dbg(veu->dev,
"Setting format for type %d, wxh: %dx%d, fmt: %x\n",
f->type, pix->width, pix->height, vfmt->fmt->fourcc);
return 0;
}
static int sh_veu_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
int ret = sh_veu_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
return sh_veu_s_fmt(priv, f);
}
static int sh_veu_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
int ret = sh_veu_try_fmt_vid_out(file, priv, f);
if (ret)
return ret;
return sh_veu_s_fmt(priv, f);
}
static int sh_veu_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct sh_veu_file *veu_file = priv;
struct sh_veu_dev *veu = veu_file->veu_dev;
int ret = sh_veu_context_init(veu);
if (ret < 0)
return ret;
ret = sh_veu_stream_init(veu, veu_file, reqbufs->type);
if (ret < 0)
return ret;
return v4l2_m2m_reqbufs(file, veu->m2m_ctx, reqbufs);
}
static int sh_veu_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct sh_veu_file *veu_file = priv;
if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
return -EBUSY;
return v4l2_m2m_querybuf(file, veu_file->veu_dev->m2m_ctx, buf);
}
static int sh_veu_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct sh_veu_file *veu_file = priv;
dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
return -EBUSY;
return v4l2_m2m_qbuf(file, veu_file->veu_dev->m2m_ctx, buf);
}
static int sh_veu_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct sh_veu_file *veu_file = priv;
dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
return -EBUSY;
return v4l2_m2m_dqbuf(file, veu_file->veu_dev->m2m_ctx, buf);
}
static void sh_veu_calc_scale(struct sh_veu_dev *veu,
int size_in, int size_out, int crop_out,
u32 *mant, u32 *frac, u32 *rep)
{
u32 fixpoint;
/* calculate FRAC and MANT */
*rep = *mant = *frac = 0;
if (size_in == size_out) {
if (crop_out != size_out)
*mant = 1; /* needed for cropping */
return;
}
/* VEU2H special upscale */
if (veu->is_2h && size_out > size_in) {
u32 fixpoint = (4096 * size_in) / size_out;
*mant = fixpoint / 4096;
*frac = (fixpoint - (*mant * 4096)) & ~0x07;
switch (*frac) {
case 0x800:
*rep = 1;
break;
case 0x400:
*rep = 3;
break;
case 0x200:
*rep = 7;
break;
}
if (*rep)
return;
}
fixpoint = (4096 * (size_in - 1)) / (size_out + 1);
*mant = fixpoint / 4096;
*frac = fixpoint - (*mant * 4096);
if (*frac & 0x07) {
/*
* FIXME: do we really have to round down twice in the
* up-scaling case?
*/
*frac &= ~0x07;
if (size_out > size_in)
*frac -= 8; /* round down if scaling up */
else
*frac += 8; /* round up if scaling down */
}
}
static unsigned long sh_veu_scale_v(struct sh_veu_dev *veu,
int size_in, int size_out, int crop_out)
{
u32 mant, frac, value, rep;
sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
/* set scale */
value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff0000) |
(((mant << 12) | frac) << 16);
sh_veu_reg_write(veu, VEU_RFCR, value);
/* set clip */
value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff0000) |
(((rep << 12) | crop_out) << 16);
sh_veu_reg_write(veu, VEU_RFSR, value);
return ALIGN((size_in * crop_out) / size_out, 4);
}
static unsigned long sh_veu_scale_h(struct sh_veu_dev *veu,
int size_in, int size_out, int crop_out)
{
u32 mant, frac, value, rep;
sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
/* set scale */
value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff) |
(mant << 12) | frac;
sh_veu_reg_write(veu, VEU_RFCR, value);
/* set clip */
value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff) |
(rep << 12) | crop_out;
sh_veu_reg_write(veu, VEU_RFSR, value);
return ALIGN((size_in * crop_out) / size_out, 4);
}
static void sh_veu_configure(struct sh_veu_dev *veu)
{
u32 src_width, src_stride, src_height;
u32 dst_width, dst_stride, dst_height;
u32 real_w, real_h;
/* reset VEU */
sh_veu_reg_write(veu, VEU_BSRR, 0x100);
src_width = veu->vfmt_in.frame.width;
src_height = veu->vfmt_in.frame.height;
src_stride = ALIGN(veu->vfmt_in.frame.width, 16);
dst_width = real_w = veu->vfmt_out.frame.width;
dst_height = real_h = veu->vfmt_out.frame.height;
/* Datasheet is unclear - whether it's always number of bytes or not */
dst_stride = veu->vfmt_out.bytesperline;
/*
* So far real_w == dst_width && real_h == dst_height, but it wasn't
* necessarily the case in the original vidix driver, so, it may change
* here in the future too.
*/
src_width = sh_veu_scale_h(veu, src_width, real_w, dst_width);
src_height = sh_veu_scale_v(veu, src_height, real_h, dst_height);
sh_veu_reg_write(veu, VEU_SWR, src_stride);
sh_veu_reg_write(veu, VEU_SSR, src_width | (src_height << 16));
sh_veu_reg_write(veu, VEU_BSSR, 0); /* not using bundle mode */
sh_veu_reg_write(veu, VEU_EDWR, dst_stride);
sh_veu_reg_write(veu, VEU_DACR, 0); /* unused for RGB */
sh_veu_reg_write(veu, VEU_SWPR, 0x67);
sh_veu_reg_write(veu, VEU_TRCR, (6 << 16) | (0 << 14) | 2 | 4);
if (veu->is_2h) {
sh_veu_reg_write(veu, VEU_MCR00, 0x0cc5);
sh_veu_reg_write(veu, VEU_MCR01, 0x0950);
sh_veu_reg_write(veu, VEU_MCR02, 0x0000);
sh_veu_reg_write(veu, VEU_MCR10, 0x397f);
sh_veu_reg_write(veu, VEU_MCR11, 0x0950);
sh_veu_reg_write(veu, VEU_MCR12, 0x3ccd);
sh_veu_reg_write(veu, VEU_MCR20, 0x0000);
sh_veu_reg_write(veu, VEU_MCR21, 0x0950);
sh_veu_reg_write(veu, VEU_MCR22, 0x1023);
sh_veu_reg_write(veu, VEU_COFFR, 0x00800010);
}
}
static int sh_veu_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct sh_veu_file *veu_file = priv;
if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
return -EBUSY;
if (veu_file->cfg_needed) {
struct sh_veu_dev *veu = veu_file->veu_dev;
veu_file->cfg_needed = false;
sh_veu_configure(veu_file->veu_dev);
veu->xaction = 0;
veu->aborting = false;
}
return v4l2_m2m_streamon(file, veu_file->veu_dev->m2m_ctx, type);
}
static int sh_veu_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct sh_veu_file *veu_file = priv;
if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
return -EBUSY;
return v4l2_m2m_streamoff(file, veu_file->veu_dev->m2m_ctx, type);
}
static const struct v4l2_ioctl_ops sh_veu_ioctl_ops = {
.vidioc_querycap = sh_veu_querycap,
.vidioc_enum_fmt_vid_cap = sh_veu_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = sh_veu_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = sh_veu_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = sh_veu_s_fmt_vid_cap,
.vidioc_enum_fmt_vid_out = sh_veu_enum_fmt_vid_out,
.vidioc_g_fmt_vid_out = sh_veu_g_fmt_vid_out,
.vidioc_try_fmt_vid_out = sh_veu_try_fmt_vid_out,
.vidioc_s_fmt_vid_out = sh_veu_s_fmt_vid_out,
.vidioc_reqbufs = sh_veu_reqbufs,
.vidioc_querybuf = sh_veu_querybuf,
.vidioc_qbuf = sh_veu_qbuf,
.vidioc_dqbuf = sh_veu_dqbuf,
.vidioc_streamon = sh_veu_streamon,
.vidioc_streamoff = sh_veu_streamoff,
};
/* ========== Queue operations ========== */
static int sh_veu_queue_setup(struct vb2_queue *vq,
const struct v4l2_format *f,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct sh_veu_dev *veu = vb2_get_drv_priv(vq);
struct sh_veu_vfmt *vfmt;
unsigned int size, count = *nbuffers;
if (f) {
const struct v4l2_pix_format *pix = &f->fmt.pix;
const struct sh_veu_format *fmt = sh_veu_find_fmt(f);
struct v4l2_format ftmp = *f;
if (fmt->fourcc != pix->pixelformat)
return -EINVAL;
sh_veu_try_fmt(&ftmp, fmt);
if (ftmp.fmt.pix.width != pix->width ||
ftmp.fmt.pix.height != pix->height)
return -EINVAL;
size = pix->bytesperline ? pix->bytesperline * pix->height * fmt->depth / fmt->ydepth :
pix->width * pix->height * fmt->depth / fmt->ydepth;
} else {
vfmt = sh_veu_get_vfmt(veu, vq->type);
size = vfmt->bytesperline * vfmt->frame.height * vfmt->fmt->depth / vfmt->fmt->ydepth;
}
if (count < 2)
*nbuffers = count = 2;
if (size * count > VIDEO_MEM_LIMIT) {
count = VIDEO_MEM_LIMIT / size;
*nbuffers = count;
}
*nplanes = 1;
sizes[0] = size;
alloc_ctxs[0] = veu->alloc_ctx;
dev_dbg(veu->dev, "get %d buffer(s) of size %d each.\n", count, size);
return 0;
}
static int sh_veu_buf_prepare(struct vb2_buffer *vb)
{
struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
struct sh_veu_vfmt *vfmt;
unsigned int sizeimage;
vfmt = sh_veu_get_vfmt(veu, vb->vb2_queue->type);
sizeimage = vfmt->bytesperline * vfmt->frame.height *
vfmt->fmt->depth / vfmt->fmt->ydepth;
if (vb2_plane_size(vb, 0) < sizeimage) {
dev_dbg(veu->dev, "%s data will not fit into plane (%lu < %u)\n",
__func__, vb2_plane_size(vb, 0), sizeimage);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, sizeimage);
return 0;
}
static void sh_veu_buf_queue(struct vb2_buffer *vb)
{
struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
dev_dbg(veu->dev, "%s(%d)\n", __func__, vb->v4l2_buf.type);
v4l2_m2m_buf_queue(veu->m2m_ctx, vb);
}
static void sh_veu_wait_prepare(struct vb2_queue *q)
{
sh_veu_unlock(vb2_get_drv_priv(q));
}
static void sh_veu_wait_finish(struct vb2_queue *q)
{
sh_veu_lock(vb2_get_drv_priv(q));
}
static const struct vb2_ops sh_veu_qops = {
.queue_setup = sh_veu_queue_setup,
.buf_prepare = sh_veu_buf_prepare,
.buf_queue = sh_veu_buf_queue,
.wait_prepare = sh_veu_wait_prepare,
.wait_finish = sh_veu_wait_finish,
};
static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
struct vb2_queue *dst_vq)
{
int ret;
memset(src_vq, 0, sizeof(*src_vq));
src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
src_vq->drv_priv = priv;
src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
src_vq->ops = &sh_veu_qops;
src_vq->mem_ops = &vb2_dma_contig_memops;
ret = vb2_queue_init(src_vq);
if (ret < 0)
return ret;
memset(dst_vq, 0, sizeof(*dst_vq));
dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
dst_vq->drv_priv = priv;
dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
dst_vq->ops = &sh_veu_qops;
dst_vq->mem_ops = &vb2_dma_contig_memops;
return vb2_queue_init(dst_vq);
}
/* ========== File operations ========== */
static int sh_veu_open(struct file *file)
{
struct sh_veu_dev *veu = video_drvdata(file);
struct sh_veu_file *veu_file;
veu_file = kzalloc(sizeof(*veu_file), GFP_KERNEL);
if (!veu_file)
return -ENOMEM;
veu_file->veu_dev = veu;
veu_file->cfg_needed = true;
file->private_data = veu_file;
pm_runtime_get_sync(veu->dev);
dev_dbg(veu->dev, "Created instance %p\n", veu_file);
return 0;
}
static int sh_veu_release(struct file *file)
{
struct sh_veu_dev *veu = video_drvdata(file);
struct sh_veu_file *veu_file = file->private_data;
dev_dbg(veu->dev, "Releasing instance %p\n", veu_file);
if (veu_file == veu->capture) {
veu->capture = NULL;
vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE));
}
if (veu_file == veu->output) {
veu->output = NULL;
vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT));
}
if (!veu->output && !veu->capture && veu->m2m_ctx) {
v4l2_m2m_ctx_release(veu->m2m_ctx);
veu->m2m_ctx = NULL;
}
pm_runtime_put(veu->dev);
kfree(veu_file);
return 0;
}
static unsigned int sh_veu_poll(struct file *file,
struct poll_table_struct *wait)
{
struct sh_veu_file *veu_file = file->private_data;
return v4l2_m2m_poll(file, veu_file->veu_dev->m2m_ctx, wait);
}
static int sh_veu_mmap(struct file *file, struct vm_area_struct *vma)
{
struct sh_veu_file *veu_file = file->private_data;
return v4l2_m2m_mmap(file, veu_file->veu_dev->m2m_ctx, vma);
}
static const struct v4l2_file_operations sh_veu_fops = {
.owner = THIS_MODULE,
.open = sh_veu_open,
.release = sh_veu_release,
.poll = sh_veu_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = sh_veu_mmap,
};
static const struct video_device sh_veu_videodev = {
.name = "sh-veu",
.fops = &sh_veu_fops,
.ioctl_ops = &sh_veu_ioctl_ops,
.minor = -1,
.release = video_device_release_empty,
.vfl_dir = VFL_DIR_M2M,
};
static const struct v4l2_m2m_ops sh_veu_m2m_ops = {
.device_run = sh_veu_device_run,
.job_abort = sh_veu_job_abort,
};
static irqreturn_t sh_veu_bh(int irq, void *dev_id)
{
struct sh_veu_dev *veu = dev_id;
if (veu->xaction == MEM2MEM_DEF_TRANSLEN || veu->aborting) {
v4l2_m2m_job_finish(veu->m2m_dev, veu->m2m_ctx);
veu->xaction = 0;
} else {
sh_veu_device_run(veu);
}
return IRQ_HANDLED;
}
static irqreturn_t sh_veu_isr(int irq, void *dev_id)
{
struct sh_veu_dev *veu = dev_id;
struct vb2_buffer *dst;
struct vb2_buffer *src;
u32 status = sh_veu_reg_read(veu, VEU_EVTR);
/* bundle read mode not used */
if (!(status & 1))
return IRQ_NONE;
/* disable interrupt in VEU */
sh_veu_reg_write(veu, VEU_EIER, 0);
/* halt operation */
sh_veu_reg_write(veu, VEU_STR, 0);
/* ack int, write 0 to clear bits */
sh_veu_reg_write(veu, VEU_EVTR, status & ~1);
/* conversion completed */
dst = v4l2_m2m_dst_buf_remove(veu->m2m_ctx);
src = v4l2_m2m_src_buf_remove(veu->m2m_ctx);
if (!src || !dst)
return IRQ_NONE;
spin_lock(&veu->lock);
v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
spin_unlock(&veu->lock);
veu->xaction++;
return IRQ_WAKE_THREAD;
}
static int sh_veu_probe(struct platform_device *pdev)
{
struct sh_veu_dev *veu;
struct resource *reg_res;
struct video_device *vdev;
int irq, ret;
reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!reg_res || irq <= 0) {
dev_err(&pdev->dev, "Insufficient VEU platform information.\n");
return -ENODEV;
}
veu = devm_kzalloc(&pdev->dev, sizeof(*veu), GFP_KERNEL);
if (!veu)
return -ENOMEM;
veu->is_2h = resource_size(reg_res) == 0x22c;
veu->base = devm_ioremap_resource(&pdev->dev, reg_res);
if (IS_ERR(veu->base))
return PTR_ERR(veu->base);
ret = devm_request_threaded_irq(&pdev->dev, irq, sh_veu_isr, sh_veu_bh,
0, "veu", veu);
if (ret < 0)
return ret;
ret = v4l2_device_register(&pdev->dev, &veu->v4l2_dev);
if (ret < 0) {
dev_err(&pdev->dev, "Error registering v4l2 device\n");
return ret;
}
vdev = &veu->vdev;
veu->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
if (IS_ERR(veu->alloc_ctx)) {
ret = PTR_ERR(veu->alloc_ctx);
goto einitctx;
}
*vdev = sh_veu_videodev;
spin_lock_init(&veu->lock);
mutex_init(&veu->fop_lock);
vdev->lock = &veu->fop_lock;
video_set_drvdata(vdev, veu);
veu->dev = &pdev->dev;
veu->vfmt_out = DEFAULT_OUT_VFMT;
veu->vfmt_in = DEFAULT_IN_VFMT;
veu->m2m_dev = v4l2_m2m_init(&sh_veu_m2m_ops);
if (IS_ERR(veu->m2m_dev)) {
ret = PTR_ERR(veu->m2m_dev);
v4l2_err(&veu->v4l2_dev, "Failed to init mem2mem device: %d\n", ret);
goto em2minit;
}
pm_runtime_enable(&pdev->dev);
pm_runtime_resume(&pdev->dev);
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
pm_runtime_suspend(&pdev->dev);
if (ret < 0)
goto evidreg;
return ret;
evidreg:
pm_runtime_disable(&pdev->dev);
v4l2_m2m_release(veu->m2m_dev);
em2minit:
vb2_dma_contig_cleanup_ctx(veu->alloc_ctx);
einitctx:
v4l2_device_unregister(&veu->v4l2_dev);
return ret;
}
static int sh_veu_remove(struct platform_device *pdev)
{
struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
struct sh_veu_dev *veu = container_of(v4l2_dev,
struct sh_veu_dev, v4l2_dev);
video_unregister_device(&veu->vdev);
pm_runtime_disable(&pdev->dev);
v4l2_m2m_release(veu->m2m_dev);
vb2_dma_contig_cleanup_ctx(veu->alloc_ctx);
v4l2_device_unregister(&veu->v4l2_dev);
return 0;
}
static struct platform_driver __refdata sh_veu_pdrv = {
.remove = sh_veu_remove,
.driver = {
.name = "sh_veu",
.owner = THIS_MODULE,
},
};
module_platform_driver_probe(sh_veu_pdrv, sh_veu_probe);
MODULE_DESCRIPTION("sh-mobile VEU mem2mem driver");
MODULE_AUTHOR("Guennadi Liakhovetski, <g.liakhovetski@gmx.de>");
MODULE_LICENSE("GPL v2");