--- /dev/null
+/*
+ * 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/v4l2-image-sizes.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 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_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);
+
+ return PTR_ERR_OR_ZERO(veu->m2m_ctx);
+}
+
+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;
+ 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);
+
+ 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 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 = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct sh_veu_dev *veu = priv;
+ 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 = veu;
+ src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ src_vq->ops = &sh_veu_qops;
+ src_vq->mem_ops = &vb2_dma_contig_memops;
+ src_vq->lock = &veu->fop_lock;
+
+ 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 = veu;
+ dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ dst_vq->ops = &sh_veu_qops;
+ dst_vq->mem_ops = &vb2_dma_contig_memops;
+ dst_vq->lock = &veu->fop_lock;
+
+ 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;
+ vdev->v4l2_dev = &veu->v4l2_dev;
+ 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",
+ },
+};
+
+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");
Code Review / kvmfornfv.git / blobdiff