V4L/DVB: V4L: SuperH Video Output Unit (VOU) driver
Guennadi Liakhovetski [Wed, 17 Mar 2010 14:21:13 +0000 (11:21 -0300)]
A number of SuperH Mobile SoCs, including sh7724, include a Video Output Unit.
This patch adds a video (V4L2) output driver for it. The driver uses v4l2-subdev
and mediabus APIs to interface to TV encoders.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig
drivers/media/video/Makefile
drivers/media/video/sh_vou.c [new file with mode: 0644]
include/media/sh_vou.h [new file with mode: 0644]

index 7847431..e2fad46 100644 (file)
@@ -520,6 +520,13 @@ config DISPLAY_DAVINCI_DM646X_EVM
          To compile this driver as a module, choose M here: the
          module will be called vpif_display.
 
+config VIDEO_SH_VOU
+       tristate "SuperH VOU video output driver"
+       depends on VIDEO_DEV && ARCH_SHMOBILE
+       select VIDEOBUF_DMA_CONTIG
+       help
+         Support for the Video Output Unit (VOU) on SuperH SoCs.
+
 config CAPTURE_DAVINCI_DM646X_EVM
        tristate "DM646x EVM Video Capture"
        depends on VIDEO_DEV && MACH_DAVINCI_DM6467_EVM
index c51c386..ed52b6b 100644 (file)
@@ -160,6 +160,10 @@ obj-$(CONFIG_VIDEO_MX3)                    += mx3_camera.o
 obj-$(CONFIG_VIDEO_PXA27x)             += pxa_camera.o
 obj-$(CONFIG_VIDEO_SH_MOBILE_CEU)      += sh_mobile_ceu_camera.o
 
+obj-$(CONFIG_ARCH_DAVINCI)             += davinci/
+
+obj-$(CONFIG_VIDEO_SH_VOU)             += sh_vou.o
+
 obj-$(CONFIG_VIDEO_AU0828) += au0828/
 
 obj-$(CONFIG_USB_VIDEO_CLASS)  += uvc/
diff --git a/drivers/media/video/sh_vou.c b/drivers/media/video/sh_vou.c
new file mode 100644 (file)
index 0000000..f5b892a
--- /dev/null
@@ -0,0 +1,1476 @@
+/*
+ * SuperH Video Output Unit (VOU) driver
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/version.h>
+#include <linux/videodev2.h>
+
+#include <media/sh_vou.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mediabus.h>
+#include <media/videobuf-dma-contig.h>
+
+/* Mirror addresses are not available for all registers */
+#define VOUER  0
+#define VOUCR  4
+#define VOUSTR 8
+#define VOUVCR 0xc
+#define VOUISR 0x10
+#define VOUBCR 0x14
+#define VOUDPR 0x18
+#define VOUDSR 0x1c
+#define VOUVPR 0x20
+#define VOUIR  0x24
+#define VOUSRR 0x28
+#define VOUMSR 0x2c
+#define VOUHIR 0x30
+#define VOUDFR 0x34
+#define VOUAD1R        0x38
+#define VOUAD2R        0x3c
+#define VOUAIR 0x40
+#define VOUSWR 0x44
+#define VOURCR 0x48
+#define VOURPR 0x50
+
+enum sh_vou_status {
+       SH_VOU_IDLE,
+       SH_VOU_INITIALISING,
+       SH_VOU_RUNNING,
+};
+
+#define VOU_MAX_IMAGE_WIDTH    720
+#define VOU_MAX_IMAGE_HEIGHT   480
+
+struct sh_vou_device {
+       struct v4l2_device v4l2_dev;
+       struct video_device *vdev;
+       atomic_t use_count;
+       struct sh_vou_pdata *pdata;
+       spinlock_t lock;
+       void __iomem *base;
+       /* State information */
+       struct v4l2_pix_format pix;
+       struct v4l2_rect rect;
+       struct list_head queue;
+       v4l2_std_id std;
+       int pix_idx;
+       struct videobuf_buffer *active;
+       enum sh_vou_status status;
+};
+
+struct sh_vou_file {
+       struct videobuf_queue vbq;
+};
+
+/* Register access routines for sides A, B and mirror addresses */
+static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
+                              u32 value)
+{
+       __raw_writel(value, vou_dev->base + reg);
+}
+
+static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
+                               u32 value)
+{
+       __raw_writel(value, vou_dev->base + reg);
+       __raw_writel(value, vou_dev->base + reg + 0x1000);
+}
+
+static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
+                              u32 value)
+{
+       __raw_writel(value, vou_dev->base + reg + 0x2000);
+}
+
+static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
+{
+       return __raw_readl(vou_dev->base + reg);
+}
+
+static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
+                            u32 value, u32 mask)
+{
+       u32 old = __raw_readl(vou_dev->base + reg);
+
+       value = (value & mask) | (old & ~mask);
+       __raw_writel(value, vou_dev->base + reg);
+}
+
+static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
+                            u32 value, u32 mask)
+{
+       sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
+}
+
+static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
+                             u32 value, u32 mask)
+{
+       sh_vou_reg_a_set(vou_dev, reg, value, mask);
+       sh_vou_reg_b_set(vou_dev, reg, value, mask);
+}
+
+struct sh_vou_fmt {
+       u32             pfmt;
+       char            *desc;
+       unsigned char   bpp;
+       unsigned char   rgb;
+       unsigned char   yf;
+       unsigned char   pkf;
+};
+
+/* Further pixel formats can be added */
+static struct sh_vou_fmt vou_fmt[] = {
+       {
+               .pfmt   = V4L2_PIX_FMT_NV12,
+               .bpp    = 12,
+               .desc   = "YVU420 planar",
+               .yf     = 0,
+               .rgb    = 0,
+       },
+       {
+               .pfmt   = V4L2_PIX_FMT_NV16,
+               .bpp    = 16,
+               .desc   = "YVYU planar",
+               .yf     = 1,
+               .rgb    = 0,
+       },
+       {
+               .pfmt   = V4L2_PIX_FMT_RGB24,
+               .bpp    = 24,
+               .desc   = "RGB24",
+               .pkf    = 2,
+               .rgb    = 1,
+       },
+       {
+               .pfmt   = V4L2_PIX_FMT_RGB565,
+               .bpp    = 16,
+               .desc   = "RGB565",
+               .pkf    = 3,
+               .rgb    = 1,
+       },
+       {
+               .pfmt   = V4L2_PIX_FMT_RGB565X,
+               .bpp    = 16,
+               .desc   = "RGB565 byteswapped",
+               .pkf    = 3,
+               .rgb    = 1,
+       },
+};
+
+static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
+                                struct videobuf_buffer *vb)
+{
+       dma_addr_t addr1, addr2;
+
+       addr1 = videobuf_to_dma_contig(vb);
+       switch (vou_dev->pix.pixelformat) {
+       case V4L2_PIX_FMT_NV12:
+       case V4L2_PIX_FMT_NV16:
+               addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
+               break;
+       default:
+               addr2 = 0;
+       }
+
+       sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
+       sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
+}
+
+static void sh_vou_stream_start(struct sh_vou_device *vou_dev,
+                               struct videobuf_buffer *vb)
+{
+       unsigned int row_coeff;
+#ifdef __LITTLE_ENDIAN
+       u32 dataswap = 7;
+#else
+       u32 dataswap = 0;
+#endif
+
+       switch (vou_dev->pix.pixelformat) {
+       case V4L2_PIX_FMT_NV12:
+       case V4L2_PIX_FMT_NV16:
+               row_coeff = 1;
+               break;
+       case V4L2_PIX_FMT_RGB565:
+               dataswap ^= 1;
+       case V4L2_PIX_FMT_RGB565X:
+               row_coeff = 2;
+               break;
+       case V4L2_PIX_FMT_RGB24:
+               row_coeff = 3;
+               break;
+       }
+
+       sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
+       sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
+       sh_vou_schedule_next(vou_dev, vb);
+}
+
+static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+       BUG_ON(in_interrupt());
+
+       /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
+       videobuf_waiton(vb, 0, 0);
+       videobuf_dma_contig_free(vq, vb);
+       vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+/* Locking: caller holds vq->vb_lock mutex */
+static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
+                           unsigned int *size)
+{
+       struct video_device *vdev = vq->priv_data;
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
+               vou_dev->pix.height / 8;
+
+       if (*count < 2)
+               *count = 2;
+
+       /* Taking into account maximum frame size, *count will stay >= 2 */
+       if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
+               *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
+
+       dev_dbg(vq->dev, "%s(): count=%d, size=%d\n", __func__, *count, *size);
+
+       return 0;
+}
+
+/* Locking: caller holds vq->vb_lock mutex */
+static int sh_vou_buf_prepare(struct videobuf_queue *vq,
+                             struct videobuf_buffer *vb,
+                             enum v4l2_field field)
+{
+       struct video_device *vdev = vq->priv_data;
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       struct v4l2_pix_format *pix = &vou_dev->pix;
+       int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
+       int ret;
+
+       dev_dbg(vq->dev, "%s()\n", __func__);
+
+       if (vb->width   != pix->width ||
+           vb->height  != pix->height ||
+           vb->field   != pix->field) {
+               vb->width       = pix->width;
+               vb->height      = pix->height;
+               vb->field       = field;
+               if (vb->state != VIDEOBUF_NEEDS_INIT)
+                       free_buffer(vq, vb);
+       }
+
+       vb->size = vb->height * bytes_per_line;
+       if (vb->baddr && vb->bsize < vb->size) {
+               /* User buffer too small */
+               dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
+                        vb->bsize, vb->baddr);
+               return -EINVAL;
+       }
+
+       if (vb->state == VIDEOBUF_NEEDS_INIT) {
+               ret = videobuf_iolock(vq, vb, NULL);
+               if (ret < 0) {
+                       dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
+                                vb->memory, ret);
+                       return ret;
+               }
+               vb->state = VIDEOBUF_PREPARED;
+       }
+
+       dev_dbg(vq->dev,
+               "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
+               __func__, vou_dev->pix_idx, bytes_per_line,
+               videobuf_to_dma_contig(vb), vb->memory, vb->state);
+
+       return 0;
+}
+
+/* Locking: caller holds vq->vb_lock mutex and vq->irqlock spinlock */
+static void sh_vou_buf_queue(struct videobuf_queue *vq,
+                            struct videobuf_buffer *vb)
+{
+       struct video_device *vdev = vq->priv_data;
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       dev_dbg(vq->dev, "%s()\n", __func__);
+
+       vb->state = VIDEOBUF_QUEUED;
+       list_add_tail(&vb->queue, &vou_dev->queue);
+
+       if (vou_dev->status == SH_VOU_RUNNING) {
+               return;
+       } else if (!vou_dev->active) {
+               vou_dev->active = vb;
+               /* Start from side A: we use mirror addresses, so, set B */
+               sh_vou_reg_a_write(vou_dev, VOURPR, 1);
+               dev_dbg(vq->dev, "%s: first buffer status 0x%x\n", __func__,
+                       sh_vou_reg_a_read(vou_dev, VOUSTR));
+               sh_vou_schedule_next(vou_dev, vb);
+               /* Only activate VOU after the second buffer */
+       } else if (vou_dev->active->queue.next == &vb->queue) {
+               /* Second buffer - initialise register side B */
+               sh_vou_reg_a_write(vou_dev, VOURPR, 0);
+               sh_vou_stream_start(vou_dev, vb);
+
+               /* Register side switching with frame VSYNC */
+               sh_vou_reg_a_write(vou_dev, VOURCR, 5);
+               dev_dbg(vq->dev, "%s: second buffer status 0x%x\n", __func__,
+                       sh_vou_reg_a_read(vou_dev, VOUSTR));
+
+               /* Enable End-of-Frame (VSYNC) interrupts */
+               sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
+               /* Two buffers on the queue - activate the hardware */
+
+               vou_dev->status = SH_VOU_RUNNING;
+               sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
+       }
+}
+
+static void sh_vou_buf_release(struct videobuf_queue *vq,
+                              struct videobuf_buffer *vb)
+{
+       struct video_device *vdev = vq->priv_data;
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       unsigned long flags;
+
+       dev_dbg(vq->dev, "%s()\n", __func__);
+
+       spin_lock_irqsave(&vou_dev->lock, flags);
+
+       if (vou_dev->active == vb) {
+               /* disable output */
+               sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
+               /* ...but the current frame will complete */
+               sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
+               vou_dev->active = NULL;
+       }
+
+       if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
+               vb->state = VIDEOBUF_ERROR;
+               list_del(&vb->queue);
+       }
+
+       spin_unlock_irqrestore(&vou_dev->lock, flags);
+
+       free_buffer(vq, vb);
+}
+
+static struct videobuf_queue_ops sh_vou_video_qops = {
+       .buf_setup      = sh_vou_buf_setup,
+       .buf_prepare    = sh_vou_buf_prepare,
+       .buf_queue      = sh_vou_buf_queue,
+       .buf_release    = sh_vou_buf_release,
+};
+
+/* Video IOCTLs */
+static int sh_vou_querycap(struct file *file, void  *priv,
+                          struct v4l2_capability *cap)
+{
+       struct sh_vou_file *vou_file = priv;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
+       cap->version = KERNEL_VERSION(0, 1, 0);
+       cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+       return 0;
+}
+
+/* Enumerate formats, that the device can accept from the user */
+static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
+                                  struct v4l2_fmtdesc *fmt)
+{
+       struct sh_vou_file *vou_file = priv;
+
+       if (fmt->index >= ARRAY_SIZE(vou_fmt))
+               return -EINVAL;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+       strlcpy(fmt->description, vou_fmt[fmt->index].desc,
+               sizeof(fmt->description));
+       fmt->pixelformat = vou_fmt[fmt->index].pfmt;
+
+       return 0;
+}
+
+static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
+                               struct v4l2_format *fmt)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
+
+       fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+       fmt->fmt.pix = vou_dev->pix;
+
+       return 0;
+}
+
+static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
+static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
+static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
+static const unsigned char vou_scale_v_num[] = {1, 2, 4};
+static const unsigned char vou_scale_v_den[] = {1, 1, 1};
+static const unsigned char vou_scale_v_fld[] = {0, 1};
+
+static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
+                                     int pix_idx, int w_idx, int h_idx)
+{
+       struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
+       unsigned int black_left, black_top, width_max, height_max,
+               frame_in_height, frame_out_height, frame_out_top;
+       struct v4l2_rect *rect = &vou_dev->rect;
+       struct v4l2_pix_format *pix = &vou_dev->pix;
+       u32 vouvcr = 0, dsr_h, dsr_v;
+
+       if (vou_dev->std & V4L2_STD_525_60) {
+               width_max = 858;
+               height_max = 262;
+       } else {
+               width_max = 864;
+               height_max = 312;
+       }
+
+       frame_in_height = pix->height / 2;
+       frame_out_height = rect->height / 2;
+       frame_out_top = rect->top / 2;
+
+       /*
+        * Cropping scheme: max useful image is 720x480, and the total video
+        * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
+        * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
+        * of which the first 33 / 25 clocks HSYNC must be held active. This
+        * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
+        * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
+        * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
+        * beyond DSR, specified on the left and top by the VPR register "black
+        * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
+        * at 138 / 144 : 20, because that's the HSYNC timing, that our first
+        * client requires, and that's exactly what leaves us 720 pixels for the
+        * image; we leave VPR[VVP] at default 20 for now, because the client
+        * doesn't seem to have any special requirements for it. Otherwise we
+        * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
+        * the selected standard, and DPR and DSR are selected according to
+        * cropping. Q: how does the client detect the first valid line? Does
+        * HSYNC stay inactive during invalid (black) lines?
+        */
+       black_left = width_max - VOU_MAX_IMAGE_WIDTH;
+       black_top = 20;
+
+       dsr_h = rect->width + rect->left;
+       dsr_v = frame_out_height + frame_out_top;
+
+       dev_dbg(vou_dev->v4l2_dev.dev,
+               "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
+               pix->width, frame_in_height, black_left, black_top,
+               rect->left, frame_out_top, dsr_h, dsr_v);
+
+       /* VOUISR height - half of a frame height in frame mode */
+       sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
+       sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
+       sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
+       sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
+
+       /*
+        * if necessary, we could set VOUHIR to
+        * max(black_left + dsr_h, width_max) here
+        */
+
+       if (w_idx)
+               vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
+       if (h_idx)
+               vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
+
+       /* To produce a colour bar for testing set bit 23 of VOUVCR */
+       sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
+       sh_vou_reg_ab_write(vou_dev, VOUDFR,
+                           fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
+}
+
+struct sh_vou_geometry {
+       struct v4l2_rect output;
+       unsigned int in_width;
+       unsigned int in_height;
+       int scale_idx_h;
+       int scale_idx_v;
+};
+
+/*
+ * Find input geometry, that we can use to produce output, closest to the
+ * requested rectangle, using VOU scaling
+ */
+static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
+{
+       /* The compiler cannot know, that best and idx will indeed be set */
+       unsigned int best_err = UINT_MAX, best = 0, width_max, height_max;
+       int i, idx = 0;
+
+       if (std & V4L2_STD_525_60) {
+               width_max = 858;
+               height_max = 262;
+       } else {
+               width_max = 864;
+               height_max = 312;
+       }
+
+       /* Image width must be a multiple of 4 */
+       v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
+                             &geo->in_height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
+
+       /* Select scales to come as close as possible to the output image */
+       for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
+               unsigned int err;
+               unsigned int found = geo->output.width * vou_scale_h_den[i] /
+                       vou_scale_h_num[i];
+
+               if (found > VOU_MAX_IMAGE_WIDTH)
+                       /* scales increase */
+                       break;
+
+               err = abs(found - geo->in_width);
+               if (err < best_err) {
+                       best_err = err;
+                       idx = i;
+                       best = found;
+               }
+               if (!err)
+                       break;
+       }
+
+       geo->in_width = best;
+       geo->scale_idx_h = idx;
+
+       best_err = UINT_MAX;
+
+       /* This loop can be replaced with one division */
+       for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
+               unsigned int err;
+               unsigned int found = geo->output.height * vou_scale_v_den[i] /
+                       vou_scale_v_num[i];
+
+               if (found > VOU_MAX_IMAGE_HEIGHT)
+                       /* scales increase */
+                       break;
+
+               err = abs(found - geo->in_height);
+               if (err < best_err) {
+                       best_err = err;
+                       idx = i;
+                       best = found;
+               }
+               if (!err)
+                       break;
+       }
+
+       geo->in_height = best;
+       geo->scale_idx_v = idx;
+}
+
+/*
+ * Find output geometry, that we can produce, using VOU scaling, closest to
+ * the requested rectangle
+ */
+static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
+{
+       unsigned int best_err = UINT_MAX, best, width_max, height_max;
+       int i, idx;
+
+       if (std & V4L2_STD_525_60) {
+               width_max = 858;
+               height_max = 262 * 2;
+       } else {
+               width_max = 864;
+               height_max = 312 * 2;
+       }
+
+       /* Select scales to come as close as possible to the output image */
+       for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
+               unsigned int err;
+               unsigned int found = geo->in_width * vou_scale_h_num[i] /
+                       vou_scale_h_den[i];
+
+               if (found > VOU_MAX_IMAGE_WIDTH)
+                       /* scales increase */
+                       break;
+
+               err = abs(found - geo->output.width);
+               if (err < best_err) {
+                       best_err = err;
+                       idx = i;
+                       best = found;
+               }
+               if (!err)
+                       break;
+       }
+
+       geo->output.width = best;
+       geo->scale_idx_h = idx;
+       if (geo->output.left + best > width_max)
+               geo->output.left = width_max - best;
+
+       pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
+                vou_scale_h_num[idx], vou_scale_h_den[idx], best);
+
+       best_err = UINT_MAX;
+
+       /* This loop can be replaced with one division */
+       for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
+               unsigned int err;
+               unsigned int found = geo->in_height * vou_scale_v_num[i] /
+                       vou_scale_v_den[i];
+
+               if (found > VOU_MAX_IMAGE_HEIGHT)
+                       /* scales increase */
+                       break;
+
+               err = abs(found - geo->output.height);
+               if (err < best_err) {
+                       best_err = err;
+                       idx = i;
+                       best = found;
+               }
+               if (!err)
+                       break;
+       }
+
+       geo->output.height = best;
+       geo->scale_idx_v = idx;
+       if (geo->output.top + best > height_max)
+               geo->output.top = height_max - best;
+
+       pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
+                vou_scale_v_num[idx], vou_scale_v_den[idx], best);
+}
+
+static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
+                               struct v4l2_format *fmt)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       struct v4l2_pix_format *pix = &fmt->fmt.pix;
+       int pix_idx;
+       struct sh_vou_geometry geo;
+       struct v4l2_mbus_framefmt mbfmt = {
+               /* Revisit: is this the correct code? */
+               .code = V4L2_MBUS_FMT_YUYV8_2X8_LE,
+               .field = V4L2_FIELD_INTERLACED,
+               .colorspace = V4L2_COLORSPACE_SMPTE170M,
+       };
+       int ret;
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
+               vou_dev->rect.width, vou_dev->rect.height,
+               pix->width, pix->height);
+
+       if (pix->field == V4L2_FIELD_ANY)
+               pix->field = V4L2_FIELD_NONE;
+
+       if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
+           pix->field != V4L2_FIELD_NONE)
+               return -EINVAL;
+
+       for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
+               if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
+                       break;
+
+       if (pix_idx == ARRAY_SIZE(vou_fmt))
+               return -EINVAL;
+
+       /* Image width must be a multiple of 4 */
+       v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
+                             &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
+
+       geo.in_width = pix->width;
+       geo.in_height = pix->height;
+       geo.output = vou_dev->rect;
+
+       vou_adjust_output(&geo, vou_dev->std);
+
+       mbfmt.width = geo.output.width;
+       mbfmt.height = geo.output.height;
+       ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
+                                        s_mbus_fmt, &mbfmt);
+       /* Must be implemented, so, don't check for -ENOIOCTLCMD */
+       if (ret < 0)
+               return ret;
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
+               geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
+
+       /* Sanity checks */
+       if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
+           (unsigned)mbfmt.height > VOU_MAX_IMAGE_HEIGHT ||
+           mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8_LE)
+               return -EIO;
+
+       if (mbfmt.width != geo.output.width ||
+           mbfmt.height != geo.output.height) {
+               geo.output.width = mbfmt.width;
+               geo.output.height = mbfmt.height;
+
+               vou_adjust_input(&geo, vou_dev->std);
+       }
+
+       /* We tried to preserve output rectangle, but it could have changed */
+       vou_dev->rect = geo.output;
+       pix->width = geo.in_width;
+       pix->height = geo.in_height;
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
+               pix->width, pix->height);
+
+       vou_dev->pix_idx = pix_idx;
+
+       vou_dev->pix = *pix;
+
+       sh_vou_configure_geometry(vou_dev, pix_idx,
+                                 geo.scale_idx_h, geo.scale_idx_v);
+
+       return 0;
+}
+
+static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
+                                 struct v4l2_format *fmt)
+{
+       struct sh_vou_file *vou_file = priv;
+       struct v4l2_pix_format *pix = &fmt->fmt.pix;
+       int i;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+       pix->field = V4L2_FIELD_NONE;
+
+       v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
+                             &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
+
+       for (i = 0; ARRAY_SIZE(vou_fmt); i++)
+               if (vou_fmt[i].pfmt == pix->pixelformat)
+                       return 0;
+
+       pix->pixelformat = vou_fmt[0].pfmt;
+
+       return 0;
+}
+
+static int sh_vou_reqbufs(struct file *file, void *priv,
+                         struct v4l2_requestbuffers *req)
+{
+       struct sh_vou_file *vou_file = priv;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+               return -EINVAL;
+
+       return videobuf_reqbufs(&vou_file->vbq, req);
+}
+
+static int sh_vou_querybuf(struct file *file, void *priv,
+                          struct v4l2_buffer *b)
+{
+       struct sh_vou_file *vou_file = priv;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       return videobuf_querybuf(&vou_file->vbq, b);
+}
+
+static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
+{
+       struct sh_vou_file *vou_file = priv;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       return videobuf_qbuf(&vou_file->vbq, b);
+}
+
+static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
+{
+       struct sh_vou_file *vou_file = priv;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
+}
+
+static int sh_vou_streamon(struct file *file, void *priv,
+                          enum v4l2_buf_type buftype)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       struct sh_vou_file *vou_file = priv;
+       int ret;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
+                                        video, s_stream, 1);
+       if (ret < 0 && ret != -ENOIOCTLCMD)
+               return ret;
+
+       /* This calls our .buf_queue() (== sh_vou_buf_queue) */
+       return videobuf_streamon(&vou_file->vbq);
+}
+
+static int sh_vou_streamoff(struct file *file, void *priv,
+                           enum v4l2_buf_type buftype)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       struct sh_vou_file *vou_file = priv;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       /*
+        * This calls buf_release from host driver's videobuf_queue_ops for all
+        * remaining buffers. When the last buffer is freed, stop streaming
+        */
+       videobuf_streamoff(&vou_file->vbq);
+       v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
+
+       return 0;
+}
+
+static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
+{
+       switch (bus_fmt) {
+       default:
+               pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
+                          __func__, bus_fmt);
+       case SH_VOU_BUS_8BIT:
+               return 1;
+       case SH_VOU_BUS_16BIT:
+               return 0;
+       case SH_VOU_BUS_BT656:
+               return 3;
+       }
+}
+
+static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       int ret;
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
+
+       if (*std_id & ~vdev->tvnorms)
+               return -EINVAL;
+
+       ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
+                                        s_std_output, *std_id);
+       /* Shall we continue, if the subdev doesn't support .s_std_output()? */
+       if (ret < 0 && ret != -ENOIOCTLCMD)
+               return ret;
+
+       if (*std_id & V4L2_STD_525_60)
+               sh_vou_reg_ab_set(vou_dev, VOUCR,
+                       sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
+       else
+               sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
+
+       vou_dev->std = *std_id;
+
+       return 0;
+}
+
+static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
+
+       *std = vou_dev->std;
+
+       return 0;
+}
+
+static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
+
+       a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+       a->c = vou_dev->rect;
+
+       return 0;
+}
+
+/* Assume a dull encoder, do all the work ourselves. */
+static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       struct v4l2_rect *rect = &a->c;
+       struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
+       struct v4l2_pix_format *pix = &vou_dev->pix;
+       struct sh_vou_geometry geo;
+       struct v4l2_mbus_framefmt mbfmt = {
+               /* Revisit: is this the correct code? */
+               .code = V4L2_MBUS_FMT_YUYV8_2X8_LE,
+               .field = V4L2_FIELD_INTERLACED,
+               .colorspace = V4L2_COLORSPACE_SMPTE170M,
+       };
+       int ret;
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
+               rect->width, rect->height, rect->left, rect->top);
+
+       if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+               return -EINVAL;
+
+       v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
+                             &rect->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
+
+       if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
+               rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
+
+       if (rect->height + rect->top > VOU_MAX_IMAGE_HEIGHT)
+               rect->top = VOU_MAX_IMAGE_HEIGHT - rect->height;
+
+       geo.output = *rect;
+       geo.in_width = pix->width;
+       geo.in_height = pix->height;
+
+       /* Configure the encoder one-to-one, position at 0, ignore errors */
+       sd_crop.c.width = geo.output.width;
+       sd_crop.c.height = geo.output.height;
+       /*
+        * We first issue a S_CROP, so that the subsequent S_FMT delivers the
+        * final encoder configuration.
+        */
+       v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
+                                  s_crop, &sd_crop);
+       mbfmt.width = geo.output.width;
+       mbfmt.height = geo.output.height;
+       ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
+                                        s_mbus_fmt, &mbfmt);
+       /* Must be implemented, so, don't check for -ENOIOCTLCMD */
+       if (ret < 0)
+               return ret;
+
+       /* Sanity checks */
+       if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
+           (unsigned)mbfmt.height > VOU_MAX_IMAGE_HEIGHT ||
+           mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8_LE)
+               return -EIO;
+
+       geo.output.width = mbfmt.width;
+       geo.output.height = mbfmt.height;
+
+       /*
+        * No down-scaling. According to the API, current call has precedence:
+        * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
+        */
+       vou_adjust_input(&geo, vou_dev->std);
+
+       /* We tried to preserve output rectangle, but it could have changed */
+       vou_dev->rect = geo.output;
+       pix->width = geo.in_width;
+       pix->height = geo.in_height;
+
+       sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
+                                 geo.scale_idx_h, geo.scale_idx_v);
+
+       return 0;
+}
+
+/*
+ * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
+ * is the initial register values, height takes the interlaced format into
+ * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
+ * actually only meaningfully contain values <= 720 and <= 240 respectively, and
+ * not <= 864 and <= 312.
+ */
+static int sh_vou_cropcap(struct file *file, void *priv,
+                         struct v4l2_cropcap *a)
+{
+       struct sh_vou_file *vou_file = priv;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       a->type                         = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+       a->bounds.left                  = 0;
+       a->bounds.top                   = 0;
+       a->bounds.width                 = VOU_MAX_IMAGE_WIDTH;
+       a->bounds.height                = VOU_MAX_IMAGE_HEIGHT;
+       /* Default = max, set VOUDPR = 0, which is not hardware default */
+       a->defrect.left                 = 0;
+       a->defrect.top                  = 0;
+       a->defrect.width                = VOU_MAX_IMAGE_WIDTH;
+       a->defrect.height               = VOU_MAX_IMAGE_HEIGHT;
+       a->pixelaspect.numerator        = 1;
+       a->pixelaspect.denominator      = 1;
+
+       return 0;
+}
+
+static irqreturn_t sh_vou_isr(int irq, void *dev_id)
+{
+       struct sh_vou_device *vou_dev = dev_id;
+       static unsigned long j;
+       struct videobuf_buffer *vb;
+       static int cnt;
+       static int side;
+       u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
+       u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
+
+       if (!(irq_status & 0x300)) {
+               if (printk_timed_ratelimit(&j, 500))
+                       dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
+                                irq_status);
+               return IRQ_NONE;
+       }
+
+       spin_lock(&vou_dev->lock);
+       if (!vou_dev->active || list_empty(&vou_dev->queue)) {
+               if (printk_timed_ratelimit(&j, 500))
+                       dev_warn(vou_dev->v4l2_dev.dev,
+                                "IRQ without active buffer: %x!\n", irq_status);
+               /* Just ack: buf_release will disable further interrupts */
+               sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
+               spin_unlock(&vou_dev->lock);
+               return IRQ_HANDLED;
+       }
+
+       masked = ~(0x300 & irq_status) & irq_status & 0x30304;
+       dev_dbg(vou_dev->v4l2_dev.dev,
+               "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
+               irq_status, masked, vou_status, cnt);
+
+       cnt++;
+       side = vou_status & 0x10000;
+
+       /* Clear only set interrupts */
+       sh_vou_reg_a_write(vou_dev, VOUIR, masked);
+
+       vb = vou_dev->active;
+       list_del(&vb->queue);
+
+       vb->state = VIDEOBUF_DONE;
+       do_gettimeofday(&vb->ts);
+       vb->field_count++;
+       wake_up(&vb->done);
+
+       if (list_empty(&vou_dev->queue)) {
+               /* Stop VOU */
+               dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
+                       __func__, cnt);
+               sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
+               vou_dev->active = NULL;
+               vou_dev->status = SH_VOU_INITIALISING;
+               /* Disable End-of-Frame (VSYNC) interrupts */
+               sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
+               spin_unlock(&vou_dev->lock);
+               return IRQ_HANDLED;
+       }
+
+       vou_dev->active = list_entry(vou_dev->queue.next,
+                                    struct videobuf_buffer, queue);
+
+       if (vou_dev->active->queue.next != &vou_dev->queue) {
+               struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
+                                               struct videobuf_buffer, queue);
+               sh_vou_schedule_next(vou_dev, new);
+       }
+
+       spin_unlock(&vou_dev->lock);
+
+       return IRQ_HANDLED;
+}
+
+static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
+{
+       struct sh_vou_pdata *pdata = vou_dev->pdata;
+       u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
+       int i = 100;
+
+       /* Disable all IRQs */
+       sh_vou_reg_a_write(vou_dev, VOUIR, 0);
+
+       /* Reset VOU interfaces - registers unaffected */
+       sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
+       while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
+               udelay(1);
+
+       if (!i)
+               return -ETIMEDOUT;
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
+
+       if (pdata->flags & SH_VOU_PCLK_FALLING)
+               voucr |= 1 << 28;
+       if (pdata->flags & SH_VOU_HSYNC_LOW)
+               voucr |= 1 << 27;
+       if (pdata->flags & SH_VOU_VSYNC_LOW)
+               voucr |= 1 << 26;
+       sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
+
+       /* Manual register side switching at first */
+       sh_vou_reg_a_write(vou_dev, VOURCR, 4);
+       /* Default - fixed HSYNC length, can be made configurable is required */
+       sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
+
+       return 0;
+}
+
+/* File operations */
+static int sh_vou_open(struct file *file)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
+                                              GFP_KERNEL);
+
+       if (!vou_file)
+               return -ENOMEM;
+
+       dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
+
+       file->private_data = vou_file;
+
+       if (atomic_inc_return(&vou_dev->use_count) == 1) {
+               int ret;
+               /* First open */
+               vou_dev->status = SH_VOU_INITIALISING;
+               pm_runtime_get_sync(vdev->v4l2_dev->dev);
+               ret = sh_vou_hw_init(vou_dev);
+               if (ret < 0) {
+                       atomic_dec(&vou_dev->use_count);
+                       pm_runtime_put(vdev->v4l2_dev->dev);
+                       vou_dev->status = SH_VOU_IDLE;
+                       return ret;
+               }
+       }
+
+       videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
+                                      vou_dev->v4l2_dev.dev, &vou_dev->lock,
+                                      V4L2_BUF_TYPE_VIDEO_OUTPUT,
+                                      V4L2_FIELD_NONE,
+                                      sizeof(struct videobuf_buffer), vdev);
+
+       return 0;
+}
+
+static int sh_vou_release(struct file *file)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+       struct sh_vou_file *vou_file = file->private_data;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       if (!atomic_dec_return(&vou_dev->use_count)) {
+               /* Last close */
+               vou_dev->status = SH_VOU_IDLE;
+               sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
+               pm_runtime_put(vdev->v4l2_dev->dev);
+       }
+
+       file->private_data = NULL;
+       kfree(vou_file);
+
+       return 0;
+}
+
+static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
+{
+       struct sh_vou_file *vou_file = file->private_data;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       return videobuf_mmap_mapper(&vou_file->vbq, vma);
+}
+
+static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
+{
+       struct sh_vou_file *vou_file = file->private_data;
+
+       dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
+
+       return videobuf_poll_stream(file, &vou_file->vbq, wait);
+}
+
+static int sh_vou_g_chip_ident(struct file *file, void *fh,
+                                  struct v4l2_dbg_chip_ident *id)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int sh_vou_g_register(struct file *file, void *fh,
+                                struct v4l2_dbg_register *reg)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
+}
+
+static int sh_vou_s_register(struct file *file, void *fh,
+                                struct v4l2_dbg_register *reg)
+{
+       struct video_device *vdev = video_devdata(file);
+       struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
+
+       return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
+}
+#endif
+
+/* sh_vou display ioctl operations */
+static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
+       .vidioc_querycap                = sh_vou_querycap,
+       .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
+       .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
+       .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
+       .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
+       .vidioc_reqbufs                 = sh_vou_reqbufs,
+       .vidioc_querybuf                = sh_vou_querybuf,
+       .vidioc_qbuf                    = sh_vou_qbuf,
+       .vidioc_dqbuf                   = sh_vou_dqbuf,
+       .vidioc_streamon                = sh_vou_streamon,
+       .vidioc_streamoff               = sh_vou_streamoff,
+       .vidioc_s_std                   = sh_vou_s_std,
+       .vidioc_g_std                   = sh_vou_g_std,
+       .vidioc_cropcap                 = sh_vou_cropcap,
+       .vidioc_g_crop                  = sh_vou_g_crop,
+       .vidioc_s_crop                  = sh_vou_s_crop,
+       .vidioc_g_chip_ident            = sh_vou_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       .vidioc_g_register              = sh_vou_g_register,
+       .vidioc_s_register              = sh_vou_s_register,
+#endif
+};
+
+static const struct v4l2_file_operations sh_vou_fops = {
+       .owner          = THIS_MODULE,
+       .open           = sh_vou_open,
+       .release        = sh_vou_release,
+       .ioctl          = video_ioctl2,
+       .mmap           = sh_vou_mmap,
+       .poll           = sh_vou_poll,
+};
+
+static const struct video_device sh_vou_video_template = {
+       .name           = "sh_vou",
+       .fops           = &sh_vou_fops,
+       .ioctl_ops      = &sh_vou_ioctl_ops,
+       .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
+       .current_norm   = V4L2_STD_NTSC_M,
+};
+
+static int __devinit sh_vou_probe(struct platform_device *pdev)
+{
+       struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
+       struct v4l2_rect *rect;
+       struct v4l2_pix_format *pix;
+       struct i2c_adapter *i2c_adap;
+       struct video_device *vdev;
+       struct sh_vou_device *vou_dev;
+       struct resource *reg_res, *region;
+       struct v4l2_subdev *subdev;
+       int irq, ret;
+
+       reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       irq = platform_get_irq(pdev, 0);
+
+       if (!vou_pdata || !reg_res || irq <= 0) {
+               dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
+               return -ENODEV;
+       }
+
+       vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
+       if (!vou_dev)
+               return -ENOMEM;
+
+       INIT_LIST_HEAD(&vou_dev->queue);
+       spin_lock_init(&vou_dev->lock);
+       atomic_set(&vou_dev->use_count, 0);
+       vou_dev->pdata = vou_pdata;
+       vou_dev->status = SH_VOU_IDLE;
+
+       rect = &vou_dev->rect;
+       pix = &vou_dev->pix;
+
+       /* Fill in defaults */
+       vou_dev->std            = sh_vou_video_template.current_norm;
+       rect->left              = 0;
+       rect->top               = 0;
+       rect->width             = VOU_MAX_IMAGE_WIDTH;
+       rect->height            = VOU_MAX_IMAGE_HEIGHT;
+       pix->width              = VOU_MAX_IMAGE_WIDTH;
+       pix->height             = VOU_MAX_IMAGE_HEIGHT;
+       pix->pixelformat        = V4L2_PIX_FMT_YVYU;
+       pix->field              = V4L2_FIELD_NONE;
+       pix->bytesperline       = VOU_MAX_IMAGE_WIDTH * 2;
+       pix->sizeimage          = VOU_MAX_IMAGE_WIDTH * 2 * VOU_MAX_IMAGE_HEIGHT;
+       pix->colorspace         = V4L2_COLORSPACE_SMPTE170M;
+
+       region = request_mem_region(reg_res->start, resource_size(reg_res),
+                                   pdev->name);
+       if (!region) {
+               dev_err(&pdev->dev, "VOU region already claimed\n");
+               ret = -EBUSY;
+               goto ereqmemreg;
+       }
+
+       vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
+       if (!vou_dev->base) {
+               ret = -ENOMEM;
+               goto emap;
+       }
+
+       ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
+       if (ret < 0)
+               goto ereqirq;
+
+       ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
+       if (ret < 0) {
+               dev_err(&pdev->dev, "Error registering v4l2 device\n");
+               goto ev4l2devreg;
+       }
+
+       /* Allocate memory for video device */
+       vdev = video_device_alloc();
+       if (vdev == NULL) {
+               ret = -ENOMEM;
+               goto evdevalloc;
+       }
+
+       *vdev = sh_vou_video_template;
+       if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
+               vdev->tvnorms |= V4L2_STD_PAL;
+       vdev->v4l2_dev = &vou_dev->v4l2_dev;
+       vdev->release = video_device_release;
+
+       vou_dev->vdev = vdev;
+       video_set_drvdata(vdev, vou_dev);
+
+       pm_runtime_enable(&pdev->dev);
+       pm_runtime_resume(&pdev->dev);
+
+       i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
+       if (!i2c_adap) {
+               ret = -ENODEV;
+               goto ei2cgadap;
+       }
+
+       ret = sh_vou_hw_init(vou_dev);
+       if (ret < 0)
+               goto ereset;
+
+       subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
+                       vou_pdata->module_name, vou_pdata->board_info, NULL);
+       if (!subdev) {
+               ret = -ENOMEM;
+               goto ei2cnd;
+       }
+
+       ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+       if (ret < 0)
+               goto evregdev;
+
+       return 0;
+
+evregdev:
+ei2cnd:
+ereset:
+       i2c_put_adapter(i2c_adap);
+ei2cgadap:
+       video_device_release(vdev);
+       pm_runtime_disable(&pdev->dev);
+evdevalloc:
+       v4l2_device_unregister(&vou_dev->v4l2_dev);
+ev4l2devreg:
+       free_irq(irq, vou_dev);
+ereqirq:
+       iounmap(vou_dev->base);
+emap:
+       release_mem_region(reg_res->start, resource_size(reg_res));
+ereqmemreg:
+       kfree(vou_dev);
+       return ret;
+}
+
+static int __devexit sh_vou_remove(struct platform_device *pdev)
+{
+       int irq = platform_get_irq(pdev, 0);
+       struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+       struct sh_vou_device *vou_dev = container_of(v4l2_dev,
+                                               struct sh_vou_device, v4l2_dev);
+       struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
+                                           struct v4l2_subdev, list);
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct resource *reg_res;
+
+       if (irq > 0)
+               free_irq(irq, vou_dev);
+       pm_runtime_disable(&pdev->dev);
+       video_unregister_device(vou_dev->vdev);
+       i2c_put_adapter(client->adapter);
+       v4l2_device_unregister(&vou_dev->v4l2_dev);
+       iounmap(vou_dev->base);
+       reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (reg_res)
+               release_mem_region(reg_res->start, resource_size(reg_res));
+       kfree(vou_dev);
+       return 0;
+}
+
+static struct platform_driver __refdata sh_vou = {
+       .remove  = __devexit_p(sh_vou_remove),
+       .driver  = {
+               .name   = "sh-vou",
+               .owner  = THIS_MODULE,
+       },
+};
+
+static int __init sh_vou_init(void)
+{
+       return platform_driver_probe(&sh_vou, sh_vou_probe);
+}
+
+static void __exit sh_vou_exit(void)
+{
+       platform_driver_unregister(&sh_vou);
+}
+
+module_init(sh_vou_init);
+module_exit(sh_vou_exit);
+
+MODULE_DESCRIPTION("SuperH VOU driver");
+MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:sh-vou");
diff --git a/include/media/sh_vou.h b/include/media/sh_vou.h
new file mode 100644 (file)
index 0000000..a3ef302
--- /dev/null
@@ -0,0 +1,34 @@
+/*
+ * SuperH Video Output Unit (VOU) driver header
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef SH_VOU_H
+#define SH_VOU_H
+
+#include <linux/i2c.h>
+
+/* Bus flags */
+#define SH_VOU_PCLK_FALLING    (1 << 0)
+#define SH_VOU_HSYNC_LOW       (1 << 1)
+#define SH_VOU_VSYNC_LOW       (1 << 2)
+
+enum sh_vou_bus_fmt {
+       SH_VOU_BUS_8BIT,
+       SH_VOU_BUS_16BIT,
+       SH_VOU_BUS_BT656,
+};
+
+struct sh_vou_pdata {
+       enum sh_vou_bus_fmt bus_fmt;
+       int i2c_adap;
+       struct i2c_board_info *board_info;
+       unsigned long flags;
+       char *module_name;
+};
+
+#endif