Adds support for Video-In (VIU) unit of Freescale
MPC5121e. The driver supports RGB888/RGB565 formats,
capture and overlay on MPC5121e DIU frame buffer.
Signed-off-by: Hongjun Chen <hong-jun.chen@xxxxxxxxxxxxx>
Signed-off-by: Anatolij Gustschin <agust@xxxxxxx>
---
Please review and consider for inclusion in 2.6.36. Thanks!
Changes since first patch version:
- fixed problems with DMA auto-deinterlace while capturing
- reworked and simplified interrupt handler
- moved a number of global variables into driver's private
structure
- reworked and simplified overlay enable code
- reworked viu_dma_stop() to ensure the DMA transfer really
stops after calling
drivers/media/video/Kconfig | 12 +
drivers/media/video/Makefile | 1 +
drivers/media/video/fsl-viu.c | 1632 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 1645 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/fsl-viu.c
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index bdbc9d3..45bef41 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -557,6 +557,18 @@ config VIDEO_DAVINCI_VPIF
To compile this driver as a module, choose M here: the
module will be called vpif.
+config VIDEO_VIU
+ tristate "Freescale VIU Video Driver"
+ depends on VIDEO_V4L2 && PPC_MPC512x
+ select VIDEOBUF_DMA_CONTIG
+ default y
+ ---help---
+ Support for Freescale VIU video driver. This device captures
+ video data, or overlays video on DIU frame buffer.
+
+ Say Y here if you want to enable VIU device on MPC5121e Rev2+.
+ In doubt, say N.
+
config VIDEO_VIVI
tristate "Virtual Video Driver"
depends on VIDEO_DEV && VIDEO_V4L2 && !SPARC32 && !SPARC64 && FONTS
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index cc93859..542d786 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -151,6 +151,7 @@ obj-$(CONFIG_USB_S2255) += s2255drv.o
obj-$(CONFIG_VIDEO_IVTV) += ivtv/
obj-$(CONFIG_VIDEO_CX18) += cx18/
+obj-$(CONFIG_VIDEO_VIU) += fsl-viu.o
obj-$(CONFIG_VIDEO_VIVI) += vivi.o
obj-$(CONFIG_VIDEO_MEM2MEM_TESTDEV) += mem2mem_testdev.o
obj-$(CONFIG_VIDEO_CX23885) += cx23885/
diff --git a/drivers/media/video/fsl-viu.c b/drivers/media/video/fsl-viu.c
new file mode 100644
index 0000000..8f1c94f
--- /dev/null
+++ b/drivers/media/video/fsl-viu.c
@@ -0,0 +1,1632 @@
+/*
+ * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * Freescale VIU video driver
+ *
+ * Authors: Hongjun Chen <hong-jun.chen@xxxxxxxxxxxxx>
+ * Porting to 2.6.35 by DENX Software Engineering,
+ * Anatolij Gustschin <agust@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+#include <linux/version.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf-dma-contig.h>
+
+#define DRV_NAME "fsl_viu"
+#define VIU_MAJOR_VERSION 0
+#define VIU_MINOR_VERSION 5
+#define VIU_RELEASE 0
+#define VIU_VERSION KERNEL_VERSION(VIU_MAJOR_VERSION, \
+ VIU_MINOR_VERSION, \
+ VIU_RELEASE)
+
+#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
+
+#define VIU_VID_MEM_LIMIT 4 /* Video memory limit, in Mb */
+
+/* I2C address of video decoder chip is 0x4A */
+#define VIU_VIDEO_DECODER_ADDR 0x25
+
+/* supported controls */
+static struct v4l2_queryctrl viu_qctrl[] = {
+ {
+ .id = V4L2_CID_BRIGHTNESS,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Brightness",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = 127,
+ .flags = 0,
+ }, {
+ .id = V4L2_CID_CONTRAST,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Contrast",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 0x1,
+ .default_value = 0x10,
+ .flags = 0,
+ }, {
+ .id = V4L2_CID_SATURATION,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Saturation",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 0x1,
+ .default_value = 127,
+ .flags = 0,
+ }, {
+ .id = V4L2_CID_HUE,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Hue",
+ .minimum = -128,
+ .maximum = 127,
+ .step = 0x1,
+ .default_value = 0,
+ .flags = 0,
+ }
+};
+
+static int qctl_regs[ARRAY_SIZE(viu_qctrl)];
+
+static int info_level;
+
+#define dprintk(level, fmt, arg...) \
+ do { \
+ if (level <= info_level) \
+ printk(KERN_DEBUG "viu: " fmt , ## arg); \
+ } while (0)
+
+/*
+ * Basic structures
+ */
+struct viu_fmt {
+ char name[32];
+ u32 fourcc; /* v4l2 format id */
+ u32 pixelformat;
+ int depth;
+};
+
+static struct viu_fmt formats[] = {
+ {
+ .name = "RGB-16 (5/B-6/G-5/R)",
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .pixelformat = V4L2_PIX_FMT_RGB565,
+ .depth = 16,
+ }, {
+ .name = "RGB-32 (A-R-G-B)",
+ .fourcc = V4L2_PIX_FMT_RGB32,
+ .pixelformat = V4L2_PIX_FMT_RGB32,
+ .depth = 32,
+ }
+};
+
+struct viu_dev;
+struct viu_buf;
+
+/* buffer for one video frame */
+struct viu_buf {
+ /* common v4l buffer stuff -- must be first */
+ struct videobuf_buffer vb;
+ struct viu_fmt *fmt;
+};
+
+struct viu_dmaqueue {
+ struct viu_dev *dev;
+ struct list_head active;
+ struct list_head queued;
+ struct timer_list timeout;
+};
+
+struct viu_status {
+ u32 field_irq;
+ u32 vsync_irq;
+ u32 hsync_irq;
+ u32 vstart_irq;
+ u32 dma_end_irq;
+ u32 error_irq;
+};
+
+struct viu_reg {
+ u32 status_cfg;
+ u32 luminance;
+ u32 chroma_r;
+ u32 chroma_g;
+ u32 chroma_b;
+ u32 field_base_addr;
+ u32 dma_inc;
+ u32 picture_count;
+ u32 req_alarm;
+ u32 alpha;
+} __attribute__ ((packed));
+
+struct viu_dev {
+ struct v4l2_device v4l2_dev;
+ struct mutex lock;
+ spinlock_t slock;
+ int users;
+
+ struct device *dev;
+ /* various device info */
+ struct video_device *vdev;
+ struct viu_dmaqueue vidq;
+ enum v4l2_field capfield;
+ int field;
+ int first;
+ int dma_done;
+
+ /* Hardware register area */
+ struct viu_reg *vr;
+
+ /* Interrupt vector */
+ int irq;
+ struct viu_status irqs;
+
+ /* video overlay */
+ struct v4l2_framebuffer ovbuf;
+ struct viu_fmt *ovfmt;
+ unsigned int ovenable;
+ enum v4l2_field ovfield;
+
+ /* crop */
+ struct v4l2_rect crop_current;
+
+ /* clock pointer */
+ struct clk *clk;
+
+ /* decoder */
+ struct v4l2_subdev *decoder;
+};
+
+struct viu_fh {
+ struct viu_dev *dev;
+
+ /* video capture */
+ struct videobuf_queue vb_vidq;
+ spinlock_t vbq_lock; /* spinlock for the videobuf queue */
+
+ /* video overlay */
+ struct v4l2_window win;
+ struct v4l2_clip clips[1];
+
+ /* video capture */
+ struct viu_fmt *fmt;
+ int width, height, sizeimage;
+ enum v4l2_buf_type type;
+};
+
+static struct viu_reg reg_val;
+
+/*
+ * Macro definitions of VIU registers
+ */
+
+/* STATUS_CONFIG register */
+enum status_config {
+ SOFT_RST = 1 << 0,
+
+ ERR_MASK = 0x0f << 4, /* Error code mask */
+ ERR_NO = 0x00, /* No error */
+ ERR_DMA_V = 0x01 << 4, /* DMA in vertical active */
+ ERR_DMA_VB = 0x02 << 4, /* DMA in vertical blanking */
+ ERR_LINE_TOO_LONG = 0x04 << 4, /* Line too long */
+ ERR_TOO_MANG_LINES = 0x05 << 4, /* Too many lines in field */
+ ERR_LINE_TOO_SHORT = 0x06 << 4, /* Line too short */
+ ERR_NOT_ENOUGH_LINE = 0x07 << 4, /* Not enough lines in field */
+ ERR_FIFO_OVERFLOW = 0x08 << 4, /* FIFO overflow */
+ ERR_FIFO_UNDERFLOW = 0x09 << 4, /* FIFO underflow */
+ ERR_1bit_ECC = 0x0a << 4, /* One bit ECC error */
+ ERR_MORE_ECC = 0x0b << 4, /* Two/more bits ECC error */
+
+ INT_FIELD_EN = 0x01 << 8, /* Enable field interrupt */
+ INT_VSYNC_EN = 0x01 << 9, /* Enable vsync interrupt */
+ INT_HSYNC_EN = 0x01 << 10, /* Enable hsync interrupt */
+ INT_VSTART_EN = 0x01 << 11, /* Enable vstart interrupt */
+ INT_DMA_END_EN = 0x01 << 12, /* Enable DMA end interrupt */
+ INT_ERROR_EN = 0x01 << 13, /* Enable error interrupt */
+ INT_ECC_EN = 0x01 << 14, /* Enable ECC interrupt */
+
+ INT_FIELD_STATUS = 0x01 << 16, /* field interrupt status */
+ INT_VSYNC_STATUS = 0x01 << 17, /* vsync interrupt status */
+ INT_HSYNC_STATUS = 0x01 << 18, /* hsync interrupt status */
+ INT_VSTART_STATUS = 0x01 << 19, /* vstart interrupt status */
+ INT_DMA_END_STATUS = 0x01 << 20, /* DMA end interrupt status */
+ INT_ERROR_STATUS = 0x01 << 21, /* error interrupt status */
+
+ DMA_ACT = 0x01 << 27, /* Enable DMA transfer */
+ FIELD_NO = 0x01 << 28, /* Field number */
+ DITHER_ON = 0x01 << 29, /* Dithering is on */
+ ROUND_ON = 0x01 << 30, /* Round is on */
+ MODE_32BIT = 0x01 << 31, /* Data in RGBa888,
+ * 0 in RGB565
+ */
+};
+
+#define norm_maxw() 720
+#define norm_maxh() 576
+
+#define INT_ALL_STATUS (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
+ INT_HSYNC_STATUS | INT_VSTART_STATUS | \
+ INT_DMA_END_STATUS | INT_ERROR_STATUS)
+
+#define NUM_FORMATS ARRAY_SIZE(formats)
+
+static irqreturn_t viu_intr(int irq, void *dev_id);
+
+struct viu_fmt *format_by_fourcc(int fourcc)
+{
+ int i;
+
+ for (i = 0; i < NUM_FORMATS; i++) {
+ if (formats[i].pixelformat == fourcc)
+ return formats + i;
+ }
+
+ dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
+ return NULL;
+}
+
+void viu_start_dma(struct viu_dev *dev)
+{
+ struct viu_reg *vr = dev->vr;
+
+ dev->field = 0;
+
+ /* Enable DMA operation */
+ out_be32(&vr->status_cfg, SOFT_RST);
+ out_be32(&vr->status_cfg, INT_FIELD_EN);
+}
+
+void viu_stop_dma(struct viu_dev *dev)
+{
+ struct viu_reg *vr = dev->vr;
+ int cnt = 100;
+ u32 status_cfg;
+
+ out_be32(&vr->status_cfg, 0);
+
+ /* Clear pending interrupts */
+ status_cfg = in_be32(&vr->status_cfg);
+ if (status_cfg & 0x3f0000)
+ out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
+
+ if (status_cfg & DMA_ACT) {
+ do {
+ status_cfg = in_be32(&vr->status_cfg);
+ if (status_cfg & INT_DMA_END_STATUS)
+ break;
+ } while (cnt--);
+
+ if (cnt < 0) {
+ /* timed out, issue soft reset */
+ out_be32(&vr->status_cfg, SOFT_RST);
+ out_be32(&vr->status_cfg, 0);
+ } else {
+ /* clear DMA_END and other pending irqs */
+ out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
+ }
+ }
+
+ dev->field = 0;
+}
+
+static int restart_video_queue(struct viu_dmaqueue *vidq)
+{
+ struct viu_buf *buf, *prev;
+
+ dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
+ if (!list_empty(&vidq->active)) {
+ buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
+ dprintk(2, "restart_queue [%p/%d]: restart dma\n",
+ buf, buf->vb.i);
+
+ viu_stop_dma(vidq->dev);
+
+ /* cancel all outstanding capture requests */
+ list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
+ list_del(&buf->vb.queue);
+ buf->vb.state = VIDEOBUF_ERROR;
+ wake_up(&buf->vb.done);
+ }
+ mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
+ return 0;
+ }
+
+ prev = NULL;
+ for (;;) {
+ if (list_empty(&vidq->queued))
+ return 0;
+ buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
+ if (prev == NULL) {
+ list_del(&buf->vb.queue);
+ list_add_tail(&buf->vb.queue, &vidq->active);
+
+ dprintk(1, "Restarting video dma\n");
+ viu_stop_dma(vidq->dev);
+ viu_start_dma(vidq->dev);
+
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
+ dprintk(2, "[%p/%d] restart_queue - first active\n",
+ buf, buf->vb.i);
+
+ } else if (prev->vb.width == buf->vb.width &&
+ prev->vb.height == buf->vb.height &&
+ prev->fmt == buf->fmt) {
+ list_del(&buf->vb.queue);
+ list_add_tail(&buf->vb.queue, &vidq->active);
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ dprintk(2, "[%p/%d] restart_queue - move to active\n",
+ buf, buf->vb.i);
+ } else {
+ return 0;
+ }
+ prev = buf;
+ }
+}
+
+static void viu_vid_timeout(unsigned long data)
+{
+ struct viu_dev *dev = (struct viu_dev *)data;
+ struct viu_buf *buf;
+ struct viu_dmaqueue *vidq = &dev->vidq;
+
+ while (!list_empty(&vidq->active)) {
+ buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
+ list_del(&buf->vb.queue);
+ buf->vb.state = VIDEOBUF_ERROR;
+ wake_up(&buf->vb.done);
+ dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
+ }
+
+ restart_video_queue(vidq);
+}
+
+/*
+ * Videobuf operations
+ */
+static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
+ unsigned int *size)
+{
+ struct viu_fh *fh = vq->priv_data;
+
+ *size = fh->width * fh->height * fh->fmt->depth >> 3;
+ if (*count == 0)
+ *count = 32;
+
+ while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
+ (*count)--;
+
+ dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
+ return 0;
+}
+
+static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
+{
+ struct videobuf_buffer *vb = &buf->vb;
+ void *vaddr = NULL;
+
+ BUG_ON(in_interrupt());
+
+ videobuf_waiton(&buf->vb, 0, 0);
+
+ if (vq->int_ops && vq->int_ops->vaddr)
+ vaddr = vq->int_ops->vaddr(vb);
+
+ if (vaddr)
+ videobuf_dma_contig_free(vq, &buf->vb);
+
+ buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
+{
+ struct viu_reg *vr = dev->vr;
+ int bpp;
+
+ /* setup the DMA base address */
+ reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
+
+ dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
+ buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
+
+ /* interlace is on by default, set horizontal DMA increment */
+ reg_val.status_cfg = 0;
+ bpp = buf->fmt->depth >> 3;
+ switch (bpp) {
+ case 2:
+ reg_val.status_cfg &= ~MODE_32BIT;
+ reg_val.dma_inc = buf->vb.width * 2;
+ break;
+ case 4:
+ reg_val.status_cfg |= MODE_32BIT;
+ reg_val.dma_inc = buf->vb.width * 4;
+ break;
+ default:
+ dprintk(0, "doesn't support color depth(%d)\n",
+ bpp * 8);
+ return -EINVAL;
+ }
+
+ /* setup picture_count register */
+ reg_val.picture_count = (buf->vb.height / 2) << 16 |
+ buf->vb.width;
+
+ reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
+
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ dev->capfield = buf->vb.field;
+
+ /* reset dma increment if needed */
+ if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
+ reg_val.dma_inc = 0;
+
+ out_be32(&vr->dma_inc, reg_val.dma_inc);
+ out_be32(&vr->picture_count, reg_val.picture_count);
+ out_be32(&vr->field_base_addr, reg_val.field_base_addr);
+ mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
+ return 0;
+}
+
+static int buffer_prepare(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ struct viu_fh *fh = vq->priv_data;
+ struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
+ int rc;
+
+ BUG_ON(fh->fmt == NULL);
+
+ if (fh->width < 48 || fh->width > norm_maxw() ||
+ fh->height < 32 || fh->height > norm_maxh())
+ return -EINVAL;
+ buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
+ if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
+ return -EINVAL;
+
+ if (buf->fmt != fh->fmt ||
+ buf->vb.width != fh->width ||
+ buf->vb.height != fh->height ||
+ buf->vb.field != field) {
+ buf->fmt = fh->fmt;
+ buf->vb.width = fh->width;
+ buf->vb.height = fh->height;
+ buf->vb.field = field;
+ }
+
+ if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
+ rc = videobuf_iolock(vq, &buf->vb, NULL);
+ if (rc != 0)
+ goto fail;
+
+ buf->vb.width = fh->width;
+ buf->vb.height = fh->height;
+ buf->vb.field = field;
+ buf->fmt = fh->fmt;
+ }
+
+ buf->vb.state = VIDEOBUF_PREPARED;
+ return 0;
+
+fail:
+ free_buffer(vq, buf);
+ return rc;
+}
+
+static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+ struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
+ struct viu_fh *fh = vq->priv_data;
+ struct viu_dev *dev = fh->dev;
+ struct viu_dmaqueue *vidq = &dev->vidq;
+ struct viu_buf *prev;
+
+ if (!list_empty(&vidq->queued)) {
+ dprintk(1, "adding vb queue=0x%08lx\n",
+ (unsigned long)&buf->vb.queue);
+ dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
+ vidq, &vidq->queued);
+ dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
+ dev, &vidq->queued, vidq->queued.next,
+ vidq->queued.prev);
+ list_add_tail(&buf->vb.queue, &vidq->queued);
+ buf->vb.state = VIDEOBUF_QUEUED;
+ dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
+ buf, buf->vb.i);
+ } else if (list_empty(&vidq->active)) {
+ dprintk(1, "adding vb active=0x%08lx\n",
+ (unsigned long)&buf->vb.queue);
+ list_add_tail(&buf->vb.queue, &vidq->active);
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
+ dprintk(2, "[%p/%d] buffer_queue - first active\n",
+ buf, buf->vb.i);
+
+ buffer_activate(dev, buf);
+ } else {
+ dprintk(1, "adding vb queue2=0x%08lx\n",
+ (unsigned long)&buf->vb.queue);
+ prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
+ if (prev->vb.width == buf->vb.width &&
+ prev->vb.height == buf->vb.height &&
+ prev->fmt == buf->fmt) {
+ list_add_tail(&buf->vb.queue, &vidq->active);
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ dprintk(2, "[%p/%d] buffer_queue - append to active\n",
+ buf, buf->vb.i);
+ } else {
+ list_add_tail(&buf->vb.queue, &vidq->queued);
+ buf->vb.state = VIDEOBUF_QUEUED;
+ dprintk(2, "[%p/%d] buffer_queue - first queued\n",
+ buf, buf->vb.i);
+ }
+ }
+}
+
+static void buffer_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
+ struct viu_fh *fh = vq->priv_data;
+ struct viu_dev *dev = (struct viu_dev *)fh->dev;
+
+ viu_stop_dma(dev);
+ free_buffer(vq, buf);
+}
+
+static struct videobuf_queue_ops viu_video_qops = {
+ .buf_setup = buffer_setup,
+ .buf_prepare = buffer_prepare,
+ .buf_queue = buffer_queue,
+ .buf_release = buffer_release,
+};
+
+/*
+ * IOCTL vidioc handling
+ */
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strcpy(cap->driver, "viu");
+ strcpy(cap->card, "viu");
+ cap->version = VIU_VERSION;
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_STREAMING |
+ V4L2_CAP_VIDEO_OVERLAY |
+ V4L2_CAP_READWRITE;
+ return 0;
+}
+
+static int vidioc_enum_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ int index = f->index;
+
+ if (f->index > NUM_FORMATS)
+ return -EINVAL;
+
+ strlcpy(f->description, formats[index].name, sizeof(f->description));
+ f->pixelformat = formats[index].fourcc;
+ return 0;
+}
+
+static int vidioc_g_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct viu_fh *fh = priv;
+
+ f->fmt.pix.width = fh->width;
+ f->fmt.pix.height = fh->height;
+ f->fmt.pix.field = fh->vb_vidq.field;
+ f->fmt.pix.pixelformat = fh->fmt->pixelformat;
+ f->fmt.pix.bytesperline =
+ (f->fmt.pix.width * fh->fmt->depth) >> 3;
+ f->fmt.pix.sizeimage = fh->sizeimage;
+ return 0;
+}
+
+static int vidioc_try_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct viu_fmt *fmt;
+ enum v4l2_field field;
+ unsigned int maxw, maxh;
+
+ fmt = format_by_fourcc(f->fmt.pix.pixelformat);
+ if (!fmt) {
+ dprintk(1, "Fourcc format (0x%08x) invalid.",
+ f->fmt.pix.pixelformat);
+ return -EINVAL;
+ }
+
+ field = f->fmt.pix.field;
+
+ if (field == V4L2_FIELD_ANY) {
+ field = V4L2_FIELD_INTERLACED;
+ } else if (field != V4L2_FIELD_INTERLACED) {
+ dprintk(1, "Field type invalid.\n");
+ return -EINVAL;
+ }
+
+ maxw = norm_maxw();
+ maxh = norm_maxh();
+
+ f->fmt.pix.field = field;
+ if (f->fmt.pix.height < 32)
+ f->fmt.pix.height = 32;
+ if (f->fmt.pix.height > maxh)
+ f->fmt.pix.height = maxh;
+ if (f->fmt.pix.width < 48)
+ f->fmt.pix.width = 48;
+ if (f->fmt.pix.width > maxw)
+ f->fmt.pix.width = maxw;
+ f->fmt.pix.width &= ~0x03;
+ f->fmt.pix.bytesperline =
+ (f->fmt.pix.width * fmt->depth) >> 3;
+
+ return 0;
+}
+
+static int vidioc_s_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct viu_fh *fh = priv;
+ int ret;
+
+ ret = vidioc_try_fmt_cap(file, fh, f);
+ if (ret < 0)
+ return ret;
+
+ fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat);
+ fh->width = f->fmt.pix.width;
+ fh->height = f->fmt.pix.height;
+ fh->sizeimage = f->fmt.pix.sizeimage;
+ fh->vb_vidq.field = f->fmt.pix.field;
+ fh->type = f->type;
+ dprintk(1, "set to pixelformat '%4.6s'\n", (char *)&fh->fmt->name);
+ return 0;
+}
+
+static int vidioc_g_fmt_overlay(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct viu_fh *fh = priv;
+
+ f->fmt.win = fh->win;
+ return 0;
+}
+
+static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
+{
+ enum v4l2_field field;
+ int maxw, maxh;
+
+ if (dev->ovbuf.base == NULL)
+ return -EINVAL;
+ if (dev->ovfmt == NULL)
+ return -EINVAL;
+ if (win->w.width < 48 || win->w.height < 32)
+ return -EINVAL;
+
+ field = win->field;
+ maxw = dev->crop_current.width;
+ maxh = dev->crop_current.height;
+
+ if (field == V4L2_FIELD_ANY) {
+ field = (win->w.height > maxh/2)
+ ? V4L2_FIELD_INTERLACED
+ : V4L2_FIELD_TOP;
+ }
+ switch (field) {
+ case V4L2_FIELD_TOP:
+ case V4L2_FIELD_BOTTOM:
+ maxh = maxh / 2;
+ break;
+ case V4L2_FIELD_INTERLACED:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ win->field = field;
+ if (win->w.width > maxw)
+ win->w.width = maxw;
+ if (win->w.height > maxh)
+ win->w.height = maxh;
+ return 0;
+}
+
+inline void viu_activate_overlay(struct viu_reg *viu_reg)
+{
+ struct viu_reg *vr = viu_reg;
+
+ out_be32(&vr->field_base_addr, reg_val.field_base_addr);
+ out_be32(&vr->dma_inc, reg_val.dma_inc);
+ out_be32(&vr->picture_count, reg_val.picture_count);
+}
+
+static int viu_start_preview(struct viu_dev *dev, struct viu_fh *fh)
+{
+ int bpp;
+
+ dprintk(1, "%s %dx%d %s\n", __func__,
+ fh->win.w.width, fh->win.w.height, dev->ovfmt->name);
+
+ reg_val.status_cfg = 0;
+
+ /* setup window */
+ reg_val.picture_count = (fh->win.w.height / 2) << 16 |
+ fh->win.w.width;
+
+ /* setup color depth and dma increment */
+ bpp = dev->ovfmt->depth / 8;
+ switch (bpp) {
+ case 2:
+ reg_val.status_cfg &= ~MODE_32BIT;
+ reg_val.dma_inc = fh->win.w.width * 2;
+ break;
+ case 4:
+ reg_val.status_cfg |= MODE_32BIT;
+ reg_val.dma_inc = fh->win.w.width * 4;
+ break;
+ default:
+ dprintk(0, "device doesn't support color depth(%d)\n",
+ bpp * 8);
+ return -EINVAL;
+ }
+
+ dev->ovfield = fh->win.field;
+ if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
+ reg_val.dma_inc = 0;
+
+ reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
+
+ /* setup the base address of the overlay buffer */
+ reg_val.field_base_addr = (u32)dev->ovbuf.base;
+
+ dev->ovenable = 1;
+ viu_activate_overlay(dev->vr);
+
+ /* start dma */
+ viu_start_dma(dev);
+ return 0;
+}
+
+static int vidioc_s_fmt_overlay(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct viu_fh *fh = priv;
+ struct viu_dev *dev = (struct viu_dev *)fh->dev;
+ unsigned long flags;
+ int err;
+
+ err = verify_preview(dev, &f->fmt.win);
+ if (err)
+ return err;
+
+ mutex_lock(&dev->lock);
+ fh->win = f->fmt.win;
+
+ spin_lock_irqsave(&dev->slock, flags);
+ viu_start_preview(dev, fh);
+ spin_unlock_irqrestore(&dev->slock, flags);
+ mutex_unlock(&dev->lock);
+ return 0;
+}
+
+static int vidioc_try_fmt_overlay(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ return 0;
+}
+
+int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
+{
+ struct viu_fh *fh = priv;
+ struct viu_dev *dev = fh->dev;
+ struct v4l2_framebuffer *fb = arg;
+
+ *fb = dev->ovbuf;
+ fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
+ return 0;
+}
+
+int vidioc_s_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
+{
+ struct viu_fh *fh = priv;
+ struct viu_dev *dev = fh->dev;
+ struct v4l2_framebuffer *fb = arg;
+ struct viu_fmt *fmt;
+
+ if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
+ return -EPERM;
+
+ /* check args */
+ fmt = format_by_fourcc(fb->fmt.pixelformat);
+ if (fmt == NULL)
+ return -EINVAL;
+
+ /* ok, accept it */
+ dev->ovbuf = *fb;
+ dev->ovfmt = fmt;
+ if (dev->ovbuf.fmt.bytesperline == 0) {
+ dev->ovbuf.fmt.bytesperline =
+ dev->ovbuf.fmt.width * fmt->depth / 8;
+ }
+ return 0;
+}
+
+static int vidioc_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *p)
+{
+ struct viu_fh *fh = priv;
+
+ return videobuf_reqbufs(&fh->vb_vidq, p);
+}
+
+static int vidioc_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *p)
+{
+ struct viu_fh *fh = priv;
+
+ return videobuf_querybuf(&fh->vb_vidq, p);
+}
+
+static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct viu_fh *fh = priv;
+
+ return videobuf_qbuf(&fh->vb_vidq, p);
+}
+
+static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+ struct viu_fh *fh = priv;
+
+ return videobuf_dqbuf(&fh->vb_vidq, p,
+ file->f_flags & O_NONBLOCK);
+}
+
+static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+ struct viu_fh *fh = priv;
+
+ if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (fh->type != i)
+ return -EINVAL;
+
+ return videobuf_streamon(&fh->vb_vidq);
+}
+
+static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+ struct viu_fh *fh = priv;
+
+ if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (fh->type != i)
+ return -EINVAL;
+
+ return videobuf_streamoff(&fh->vb_vidq);
+}
+
+#define decoder_call(viu, o, f, args...) \
+ v4l2_subdev_call(viu->decoder, o, f, ##args)
+
+static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *id)
+{
+ struct viu_fh *fh = priv;
+
+ decoder_call(fh->dev, core, s_std, *id);
+ return 0;
+}
+
+/* only one input in this driver */
+static int vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *inp)
+{
+ struct viu_fh *fh = priv;
+
+ if (inp->index != 0)
+ return -EINVAL;
+
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+ inp->std = fh->dev->vdev->tvnorms;
+ strcpy(inp->name, "Camera");
+ return 0;
+}
+
+static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
+{
+ struct viu_fh *fh = priv;
+
+ if (i > 1)
+ return -EINVAL;
+
+ decoder_call(fh->dev, video, s_routing, i, 0, 0);
+ return 0;
+}
+
+/* Controls */
+static int vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
+ if (qc->id && qc->id == viu_qctrl[i].id) {
+ memcpy(qc, &(viu_qctrl[i]), sizeof(*qc));
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
+ if (ctrl->id == viu_qctrl[i].id) {
+ ctrl->value = qctl_regs[i];
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+static int vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
+ if (ctrl->id == viu_qctrl[i].id) {
+ if (ctrl->value < viu_qctrl[i].minimum
+ || ctrl->value > viu_qctrl[i].maximum)
+ return -ERANGE;
+ qctl_regs[i] = ctrl->value;
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+inline void viu_activate_next_buf(struct viu_dev *dev,
+ struct viu_dmaqueue *viuq)
+{
+ struct viu_dmaqueue *vidq = viuq;
+ struct viu_buf *buf;
+
+ /* launch another DMA operation for an active/queued buffer */
+ if (!list_empty(&vidq->active)) {
+ buf = list_entry(vidq->active.next, struct viu_buf,
+ vb.queue);
+ dprintk(1, "start another queued buffer: 0x%p\n", buf);
+ buffer_activate(dev, buf);
+ } else if (!list_empty(&vidq->queued)) {
+ buf = list_entry(vidq->queued.next, struct viu_buf,
+ vb.queue);
+ list_del(&buf->vb.queue);
+
+ dprintk(1, "start another queued buffer: 0x%p\n", buf);
+ list_add_tail(&buf->vb.queue, &vidq->active);
+ buf->vb.state = VIDEOBUF_ACTIVE;
+ buffer_activate(dev, buf);
+ }
+}
+
+inline void viu_default_settings(struct viu_reg *viu_reg)
+{
+ struct viu_reg *vr = viu_reg;
+
+ out_be32(&vr->luminance, 0x9512A254);
+ out_be32(&vr->chroma_r, 0x03310000);
+ out_be32(&vr->chroma_g, 0x06600F38);
+ out_be32(&vr->chroma_b, 0x00000409);
+ out_be32(&vr->alpha, 0x000000ff);
+ out_be32(&vr->req_alarm, 0x00000090);
+ dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
+ in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
+}
+
+static void viu_overlay_intr(struct viu_dev *dev, u32 status)
+{
+ struct viu_reg *vr = dev->vr;
+
+ if (status & INT_DMA_END_STATUS)
+ dev->dma_done = 1;
+
+ if (status & INT_FIELD_STATUS) {
+ if (dev->dma_done) {
+ u32 addr = reg_val.field_base_addr;
+
+ dev->dma_done = 0;
+ if (status & FIELD_NO)
+ addr += reg_val.dma_inc;
+
+ out_be32(&vr->field_base_addr, addr);
+ out_be32(&vr->dma_inc, reg_val.dma_inc);
+ out_be32(&vr->status_cfg,
+ (status & 0xffc0ffff) |
+ (status & INT_ALL_STATUS) |
+ reg_val.status_cfg);
+ } else if (status & INT_VSYNC_STATUS) {
+ out_be32(&vr->status_cfg,
+ (status & 0xffc0ffff) |
+ (status & INT_ALL_STATUS) |
+ reg_val.status_cfg);
+ }
+ }
+}
+
+static void viu_capture_intr(struct viu_dev *dev, u32 status)
+{
+ struct viu_dmaqueue *vidq = &dev->vidq;
+ struct viu_reg *vr = dev->vr;
+ struct viu_buf *buf;
+ int field_num;
+ int need_two;
+ int dma_done = 0;
+
+ field_num = status & FIELD_NO;
+ need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
+
+ if (status & INT_DMA_END_STATUS) {
+ dma_done = 1;
+ if (((field_num == 0) && (dev->field == 0)) ||
+ (field_num && (dev->field == 1)))
+ dev->field++;
+ }
+
+ if (status & INT_FIELD_STATUS) {
+ dprintk(1, "irq: field %d, done %d\n",
+ !!field_num, dma_done);
+ if (unlikely(dev->first)) {
+ if (field_num == 0) {
+ dev->first = 0;
+ dprintk(1, "activate first buf\n");
+ viu_activate_next_buf(dev, vidq);
+ } else
+ dprintk(1, "wait field 0\n");
+ return;
+ }
+
+ /* setup buffer address for next dma operation */
+ if (!list_empty(&vidq->active)) {
+ u32 addr = reg_val.field_base_addr;
+
+ if (field_num && need_two) {
+ addr += reg_val.dma_inc;
+ dprintk(1, "field 1, 0x%lx, dev field %d\n",
+ (unsigned long)addr, dev->field);
+ }
+ out_be32(&vr->field_base_addr, addr);
+ out_be32(&vr->dma_inc, reg_val.dma_inc);
+ out_be32(&vr->status_cfg,
+ (status & 0xffc0ffff) |
+ (status & INT_ALL_STATUS) |
+ reg_val.status_cfg);
+ return;
+ }
+ }
+
+ if (dma_done && field_num && (dev->field == 2)) {
+ dev->field = 0;
+ buf = list_entry(vidq->active.next,
+ struct viu_buf, vb.queue);
+ dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
+ buf, buf->vb.i,
+ (unsigned long)videobuf_to_dma_contig(&buf->vb),
+ (unsigned long)in_be32(&vr->field_base_addr));
+
+ if (waitqueue_active(&buf->vb.done)) {
+ list_del(&buf->vb.queue);
+ do_gettimeofday(&buf->vb.ts);
+ buf->vb.state = VIDEOBUF_DONE;
+ buf->vb.field_count++;
+ wake_up(&buf->vb.done);
+ }
+ /* activate next dma buffer */
+ viu_activate_next_buf(dev, vidq);
+ }
+}
+
+static irqreturn_t viu_intr(int irq, void *dev_id)
+{
+ struct viu_dev *dev = (struct viu_dev *)dev_id;
+ struct viu_reg *vr = dev->vr;
+ u32 status;
+ u32 error;
+
+ status = in_be32(&vr->status_cfg);
+
+ if (status & INT_ERROR_STATUS) {
+ dev->irqs.error_irq++;
+ error = status & ERR_MASK;
+ if (error)
+ dprintk(1, "Err: error(%d), times:%d!\n",
+ error >> 4, dev->irqs.error_irq);
+ /* Clear interrupt error bit and error flags */
+ out_be32(&vr->status_cfg,
+ (status & 0xffc0ffff) | INT_ERROR_STATUS);
+ }
+
+ if (status & INT_DMA_END_STATUS) {
+ dev->irqs.dma_end_irq++;
+ dev->dma_done = 1;
+ dprintk(2, "VIU DMA end interrupt times: %d\n",
+ dev->irqs.dma_end_irq);
+ }
+
+ if (status & INT_HSYNC_STATUS)
+ dev->irqs.hsync_irq++;
+
+ if (status & INT_FIELD_STATUS) {
+ dev->irqs.field_irq++;
+ dprintk(2, "VIU field interrupt times: %d\n",
+ dev->irqs.field_irq);
+ }
+
+ if (status & INT_VSTART_STATUS)
+ dev->irqs.vstart_irq++;
+
+ if (status & INT_VSYNC_STATUS) {
+ dev->irqs.vsync_irq++;
+ dprintk(2, "VIU vsync interrupt times: %d\n",
+ dev->irqs.vsync_irq);
+ }
+
+ /* clear all pending irqs */
+ status = in_be32(&vr->status_cfg);
+ out_be32(&vr->status_cfg,
+ (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
+
+ if (dev->ovenable) {
+ viu_overlay_intr(dev, status);
+ return IRQ_HANDLED;
+ }
+
+ /* Capture mode */
+ viu_capture_intr(dev, status);
+ return IRQ_HANDLED;
+}
+
+/*
+ * File operations for the device
+ */
+static int viu_open(struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct viu_dev *dev = video_get_drvdata(vdev);
+ struct viu_fh *fh;
+ struct viu_reg *vr;
+ int minor = vdev->minor;
+ u32 status_cfg;
+ int i;
+
+ dprintk(1, "viu: open (minor=%d)\n", minor);
+
+ dev->users++;
+ if (dev->users > 1) {
+ dev->users--;
+ return -EBUSY;
+ }
+
+ vr = dev->vr;
+
+ dprintk(1, "open minor=%d type=%s users=%d\n", minor,
+ v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
+
+ /* allocate and initialize per filehandle data */
+ fh = kzalloc(sizeof(*fh), GFP_KERNEL);
+ if (!fh) {
+ dev->users--;
+ return -ENOMEM;
+ }
+
+ file->private_data = fh;
+ fh->dev = dev;
+
+ fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ fh->fmt = format_by_fourcc(V4L2_PIX_FMT_RGB32);
+ fh->width = norm_maxw();
+ fh->height = norm_maxh();
+ dev->crop_current.width = fh->width;
+ dev->crop_current.height = fh->height;
+
+ /* Put all controls at a sane state */
+ for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
+ qctl_regs[i] = viu_qctrl[i].default_value;
+
+ dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
+ (unsigned long)fh, (unsigned long)dev,
+ (unsigned long)&dev->vidq);
+ dprintk(1, "Open: list_empty queued=%d\n",
+ list_empty(&dev->vidq.queued));
+ dprintk(1, "Open: list_empty active=%d\n",
+ list_empty(&dev->vidq.active));
+
+ viu_default_settings(vr);
+
+ status_cfg = in_be32(&vr->status_cfg);
+ out_be32(&vr->status_cfg,
+ status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
+ INT_FIELD_EN | INT_VSTART_EN |
+ INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
+
+ status_cfg = in_be32(&vr->status_cfg);
+ out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
+
+ spin_lock_init(&fh->vbq_lock);
+ videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
+ dev->dev, &fh->vbq_lock,
+ fh->type, V4L2_FIELD_INTERLACED,
+ sizeof(struct viu_buf), fh);
+ return 0;
+}
+
+static ssize_t viu_read(struct file *file, char __user *data, size_t count,
+ loff_t *ppos)
+{
+ struct viu_fh *fh = file->private_data;
+ struct viu_dev *dev = fh->dev;
+ int ret = 0;
+
+ dprintk(2, "%s\n", __func__);
+ if (dev->ovenable)
+ dev->ovenable = 0;
+
+ if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ viu_start_dma(dev);
+ ret = videobuf_read_stream(&fh->vb_vidq, data, count,
+ ppos, 0, file->f_flags & O_NONBLOCK);
+ return ret;
+ }
+ return 0;
+}
+
+static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct viu_fh *fh = file->private_data;
+ struct videobuf_queue *q = &fh->vb_vidq;
+
+ if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
+ return POLLERR;
+
+ return videobuf_poll_stream(file, q, wait);
+}
+
+static int viu_release(struct file *file)
+{
+ struct viu_fh *fh = file->private_data;
+ struct viu_dev *dev = fh->dev;
+ int minor = video_devdata(file)->minor;
+
+ viu_stop_dma(dev);
+ videobuf_stop(&fh->vb_vidq);
+
+ kfree(fh);
+
+ dev->users--;
+ dprintk(1, "close (minor=%d, users=%d)\n",
+ minor, dev->users);
+ return 0;
+}
+
+void viu_reset(struct viu_reg *reg)
+{
+ out_be32(®->status_cfg, 0);
+ out_be32(®->luminance, 0x9512a254);
+ out_be32(®->chroma_r, 0x03310000);
+ out_be32(®->chroma_g, 0x06600f38);
+ out_be32(®->chroma_b, 0x00000409);
+ out_be32(®->field_base_addr, 0);
+ out_be32(®->dma_inc, 0);
+ out_be32(®->picture_count, 0x01e002d0);
+ out_be32(®->req_alarm, 0x00000090);
+ out_be32(®->alpha, 0x000000ff);
+}
+
+static int viu_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct viu_fh *fh = file->private_data;
+ int ret;
+
+ dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
+
+ ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
+
+ dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
+ (unsigned long)vma->vm_start,
+ (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
+ ret);
+
+ return ret;
+}
+
+static struct v4l2_file_operations viu_fops = {
+ .owner = THIS_MODULE,
+ .open = viu_open,
+ .release = viu_release,
+ .read = viu_read,
+ .poll = viu_poll,
+ .ioctl = video_ioctl2, /* V4L2 ioctl handler */
+ .mmap = viu_mmap,
+};
+
+static const struct v4l2_ioctl_ops viu_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+ .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
+ .vidioc_g_fmt_vid_cap = vidioc_g_fmt_cap,
+ .vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap,
+ .vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap,
+ .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
+ .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
+ .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
+ .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
+ .vidioc_g_fbuf = vidioc_g_fbuf,
+ .vidioc_s_fbuf = vidioc_s_fbuf,
+ .vidioc_reqbufs = vidioc_reqbufs,
+ .vidioc_querybuf = vidioc_querybuf,
+ .vidioc_qbuf = vidioc_qbuf,
+ .vidioc_dqbuf = vidioc_dqbuf,
+ .vidioc_s_std = vidioc_s_std,
+ .vidioc_enum_input = vidioc_enum_input,
+ .vidioc_g_input = vidioc_g_input,
+ .vidioc_s_input = vidioc_s_input,
+ .vidioc_queryctrl = vidioc_queryctrl,
+ .vidioc_g_ctrl = vidioc_g_ctrl,
+ .vidioc_s_ctrl = vidioc_s_ctrl,
+ .vidioc_streamon = vidioc_streamon,
+ .vidioc_streamoff = vidioc_streamoff,
+};
+
+static struct video_device viu_template = {
+ .name = "FSL viu",
+ .fops = &viu_fops,
+ .minor = -1,
+ .ioctl_ops = &viu_ioctl_ops,
+ .release = video_device_release,
+
+ .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL,
+ .current_norm = V4L2_STD_NTSC_M,
+};
+
+static int __devinit viu_of_probe(struct of_device *op,
+ const struct of_device_id *match)
+{
+ struct viu_dev *viu_dev;
+ struct video_device *vdev;
+ struct resource r;
+ struct viu_reg __iomem *viu_regs;
+ struct i2c_adapter *ad;
+ int ret, viu_irq;
+
+ ret = of_address_to_resource(op->dev.of_node, 0, &r);
+ if (ret) {
+ dev_err(&op->dev, "Can't parse device node resource\n");
+ return -ENODEV;
+ }
+
+ viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
+ if (viu_irq == NO_IRQ) {
+ dev_err(&op->dev, "Error while mapping the irq\n");
+ return -EINVAL;
+ }
+
+ /* request mem region */
+ if (!devm_request_mem_region(&op->dev, r.start,
+ sizeof(struct viu_reg), DRV_NAME)) {
+ dev_err(&op->dev, "Error while requesting mem region\n");
+ ret = -EBUSY;
+ goto err;
+ }
+
+ /* remap registers */
+ viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
+ if (!viu_regs) {
+ dev_err(&op->dev, "Can't map register set\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* Prepare our private structure */
+ viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
+ if (!viu_dev) {
+ dev_err(&op->dev, "Can't allocate private structure\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ viu_dev->vr = viu_regs;
+ viu_dev->irq = viu_irq;
+ viu_dev->dev = &op->dev;
+
+ /* init video dma queues */
+ INIT_LIST_HEAD(&viu_dev->vidq.active);
+ INIT_LIST_HEAD(&viu_dev->vidq.queued);
+
+ /* initialize locks */
+ mutex_init(&viu_dev->lock);
+
+ snprintf(viu_dev->v4l2_dev.name,
+ sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
+ ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
+ if (ret < 0) {
+ dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
+ goto err;
+ }
+
+ ad = i2c_get_adapter(0);
+ viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
+ "saa7115", "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
+
+ viu_dev->vidq.timeout.function = viu_vid_timeout;
+ viu_dev->vidq.timeout.data = (unsigned long)viu_dev;
+ init_timer(&viu_dev->vidq.timeout);
+ viu_dev->first = 1;
+
+ /* Allocate memory for video device */
+ vdev = video_device_alloc();
+ if (vdev == NULL) {
+ ret = -ENOMEM;
+ goto err_vdev;
+ }
+
+ memcpy(vdev, &viu_template, sizeof(viu_template));
+
+ vdev->v4l2_dev = &viu_dev->v4l2_dev;
+
+ viu_dev->vdev = vdev;
+
+ video_set_drvdata(viu_dev->vdev, viu_dev);
+
+ ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret < 0) {
+ video_device_release(viu_dev->vdev);
+ goto err_vdev;
+ }
+
+ /* enable VIU clock */
+ viu_dev->clk = clk_get(&op->dev, "viu_clk");
+ if (IS_ERR(viu_dev->clk)) {
+ dev_err(&op->dev, "failed to find the clock module!\n");
+ ret = -ENODEV;
+ goto err_clk;
+ } else {
+ clk_enable(viu_dev->clk);
+ }
+
+ /* reset VIU module */
+ viu_reset(viu_dev->vr);
+
+ /* install interrupt handler */
+ if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
+ dev_err(&op->dev, "Request VIU IRQ failed.\n");
+ ret = -ENODEV;
+ goto err_irq;
+ }
+
+ dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
+ return ret;
+
+err_irq:
+ clk_disable(viu_dev->clk);
+ clk_put(viu_dev->clk);
+err_clk:
+ video_unregister_device(viu_dev->vdev);
+err_vdev:
+ i2c_put_adapter(ad);
+ v4l2_device_unregister(&viu_dev->v4l2_dev);
+err:
+ irq_dispose_mapping(viu_irq);
+ return ret;
+}
+
+static int __devexit viu_of_remove(struct of_device *op)
+{
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
+ struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
+ struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
+ struct v4l2_subdev, list);
+ struct i2c_client *client = v4l2_get_subdevdata(sdev);
+
+ free_irq(dev->irq, (void *)dev);
+ irq_dispose_mapping(dev->irq);
+
+ clk_disable(dev->clk);
+ clk_put(dev->clk);
+
+ video_unregister_device(dev->vdev);
+ i2c_put_adapter(client->adapter);
+ v4l2_device_unregister(&dev->v4l2_dev);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int viu_suspend(struct of_device *op, pm_message_t state)
+{
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
+ struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
+
+ clk_disable(dev->clk);
+ return 0;
+}
+
+static int viu_resume(struct of_device *op)
+{
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
+ struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
+
+ clk_enable(dev->clk);
+ return 0;
+}
+#endif
+
+/*
+ * Initialization and module stuff
+ */
+static struct of_device_id mpc512x_viu_of_match[] = {
+ {
+ .compatible = "fsl,mpc5121-viu",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
+
+static struct of_platform_driver viu_of_platform_driver = {
+ .probe = viu_of_probe,
+ .remove = __devexit_p(viu_of_remove),
+#ifdef CONFIG_PM
+ .suspend = viu_suspend,
+ .resume = viu_resume,
+#endif
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = mpc512x_viu_of_match,
+ },
+};
+
+static int __init viu_init(void)
+{
+ return of_register_platform_driver(&viu_of_platform_driver);
+}
+
+static void __exit viu_exit(void)
+{
+ of_unregister_platform_driver(&viu_of_platform_driver);
+}
+
+module_init(viu_init);
+module_exit(viu_exit);
+
+MODULE_DESCRIPTION("Freescale Video-In(VIU)");
+MODULE_AUTHOR("Hongjun Chen");
+MODULE_LICENSE("GPL");
--
1.7.0.4
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