>From 3d5844cb025a6489c80a17aa78f54efceadd03b1 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
Date: Wed, 17 Mar 2010 15:21:13 +0100
Subject: [PATCH 1/3] V4L: SuperH Video Output Unit (VOU) driver
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.liakhovet...@gmx.de>
Acked-by: Paul Mundt <let...@linux-sh.org>
---
v2 -> v3:
1. Added "Mobile" in the patch description
2. Changed Kconfig to only depend on ARCH_SHMOBILE, instead of (SUPERH ||
ARCH_SHMOBILE)
3. Added an Acked-by from Paul Mundt
drivers/media/video/Kconfig | 7 +
drivers/media/video/Makefile | 2 +
drivers/media/video/sh_vou.c | 1476 ++++++++++++++++++++++++++++++++++++++++++
include/media/sh_vou.h | 34 +
4 files changed, 1519 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/sh_vou.c
create mode 100644 include/media/sh_vou.h
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index f8fc865..503dffa 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -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
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index b88b617..ed52b6b 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -162,6 +162,8 @@ 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
index 0000000..f5b892a
--- /dev/null
+++ b/drivers/media/video/sh_vou.c
@@ -0,0 +1,1476 @@
+/*
+ * SuperH Video Output Unit (VOU) driver
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovet...@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(): %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.liakhovet...@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
index 0000000..a3ef302
--- /dev/null
+++ b/include/media/sh_vou.h
@@ -0,0 +1,34 @@
+/*
+ * SuperH Video Output Unit (VOU) driver header
+ *
+ * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovet...@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
--
1.6.2.4
--
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