[media] add blackfin capture bridge driver
Scott Jiang [Thu, 8 Mar 2012 20:44:17 +0000 (17:44 -0300)]
This is a v4l2 bridge driver for Blackfin video capture device, support ppi and eppi interface.

Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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

index e618ca6..3cea979 100644 (file)
@@ -871,6 +871,8 @@ source "drivers/media/video/davinci/Kconfig"
 
 source "drivers/media/video/omap/Kconfig"
 
+source "drivers/media/video/blackfin/Kconfig"
+
 config VIDEO_SH_VOU
        tristate "SuperH VOU video output driver"
        depends on VIDEO_DEV && ARCH_SHMOBILE
index ac29ae0..c71c0d1 100644 (file)
@@ -187,6 +187,8 @@ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV)  += s5p-tv/
 
 obj-$(CONFIG_VIDEO_SAMSUNG_S5P_G2D)    += s5p-g2d/
 
+obj-$(CONFIG_BLACKFIN)                  += blackfin/
+
 obj-$(CONFIG_ARCH_DAVINCI)             += davinci/
 
 obj-$(CONFIG_VIDEO_SH_VOU)             += sh_vou.o
diff --git a/drivers/media/video/blackfin/Kconfig b/drivers/media/video/blackfin/Kconfig
new file mode 100644 (file)
index 0000000..ecd5323
--- /dev/null
@@ -0,0 +1,10 @@
+config VIDEO_BLACKFIN_CAPTURE
+       tristate "Blackfin Video Capture Driver"
+       depends on VIDEO_V4L2 && BLACKFIN && I2C
+       select VIDEOBUF2_DMA_CONTIG
+       help
+         V4L2 bridge driver for Blackfin video capture device.
+         Choose PPI or EPPI as its interface.
+
+         To compile this driver as a module, choose M here: the
+         module will be called bfin_video_capture.
diff --git a/drivers/media/video/blackfin/Makefile b/drivers/media/video/blackfin/Makefile
new file mode 100644 (file)
index 0000000..aa3a0a2
--- /dev/null
@@ -0,0 +1,2 @@
+bfin_video_capture-objs := bfin_capture.o ppi.o
+obj-$(CONFIG_VIDEO_BLACKFIN_CAPTURE) += bfin_video_capture.o
diff --git a/drivers/media/video/blackfin/bfin_capture.c b/drivers/media/video/blackfin/bfin_capture.c
new file mode 100644 (file)
index 0000000..514fcf7
--- /dev/null
@@ -0,0 +1,1059 @@
+/*
+ * Analog Devices video capture driver
+ *
+ * Copyright (c) 2011 Analog Devices Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/completion.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/io.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <asm/dma.h>
+
+#include <media/blackfin/bfin_capture.h>
+#include <media/blackfin/ppi.h>
+
+#define CAPTURE_DRV_NAME        "bfin_capture"
+#define BCAP_MIN_NUM_BUF        2
+
+struct bcap_format {
+       char *desc;
+       u32 pixelformat;
+       enum v4l2_mbus_pixelcode mbus_code;
+       int bpp; /* bits per pixel */
+};
+
+struct bcap_buffer {
+       struct vb2_buffer vb;
+       struct list_head list;
+};
+
+struct bcap_device {
+       /* capture device instance */
+       struct v4l2_device v4l2_dev;
+       /* v4l2 control handler */
+       struct v4l2_ctrl_handler ctrl_handler;
+       /* device node data */
+       struct video_device *video_dev;
+       /* sub device instance */
+       struct v4l2_subdev *sd;
+       /* capture config */
+       struct bfin_capture_config *cfg;
+       /* ppi interface */
+       struct ppi_if *ppi;
+       /* current input */
+       unsigned int cur_input;
+       /* current selected standard */
+       v4l2_std_id std;
+       /* used to store pixel format */
+       struct v4l2_pix_format fmt;
+       /* bits per pixel*/
+       int bpp;
+       /* used to store sensor supported format */
+       struct bcap_format *sensor_formats;
+       /* number of sensor formats array */
+       int num_sensor_formats;
+       /* pointing to current video buffer */
+       struct bcap_buffer *cur_frm;
+       /* pointing to next video buffer */
+       struct bcap_buffer *next_frm;
+       /* buffer queue used in videobuf2 */
+       struct vb2_queue buffer_queue;
+       /* allocator-specific contexts for each plane */
+       struct vb2_alloc_ctx *alloc_ctx;
+       /* queue of filled frames */
+       struct list_head dma_queue;
+       /* used in videobuf2 callback */
+       spinlock_t lock;
+       /* used to access capture device */
+       struct mutex mutex;
+       /* used to wait ppi to complete one transfer */
+       struct completion comp;
+       /* prepare to stop */
+       bool stop;
+};
+
+struct bcap_fh {
+       struct v4l2_fh fh;
+       /* indicates whether this file handle is doing IO */
+       bool io_allowed;
+};
+
+static const struct bcap_format bcap_formats[] = {
+       {
+               .desc        = "YCbCr 4:2:2 Interleaved UYVY",
+               .pixelformat = V4L2_PIX_FMT_UYVY,
+               .mbus_code   = V4L2_MBUS_FMT_UYVY8_2X8,
+               .bpp         = 16,
+       },
+       {
+               .desc        = "YCbCr 4:2:2 Interleaved YUYV",
+               .pixelformat = V4L2_PIX_FMT_YUYV,
+               .mbus_code   = V4L2_MBUS_FMT_YUYV8_2X8,
+               .bpp         = 16,
+       },
+       {
+               .desc        = "RGB 565",
+               .pixelformat = V4L2_PIX_FMT_RGB565,
+               .mbus_code   = V4L2_MBUS_FMT_RGB565_2X8_LE,
+               .bpp         = 16,
+       },
+       {
+               .desc        = "RGB 444",
+               .pixelformat = V4L2_PIX_FMT_RGB444,
+               .mbus_code   = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE,
+               .bpp         = 16,
+       },
+
+};
+#define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats)
+
+static irqreturn_t bcap_isr(int irq, void *dev_id);
+
+static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb)
+{
+       return container_of(vb, struct bcap_buffer, vb);
+}
+
+static int bcap_init_sensor_formats(struct bcap_device *bcap_dev)
+{
+       enum v4l2_mbus_pixelcode code;
+       struct bcap_format *sf;
+       unsigned int num_formats = 0;
+       int i, j;
+
+       while (!v4l2_subdev_call(bcap_dev->sd, video,
+                               enum_mbus_fmt, num_formats, &code))
+               num_formats++;
+       if (!num_formats)
+               return -ENXIO;
+
+       sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL);
+       if (!sf)
+               return -ENOMEM;
+
+       for (i = 0; i < num_formats; i++) {
+               v4l2_subdev_call(bcap_dev->sd, video,
+                               enum_mbus_fmt, i, &code);
+               for (j = 0; j < BCAP_MAX_FMTS; j++)
+                       if (code == bcap_formats[j].mbus_code)
+                               break;
+               if (j == BCAP_MAX_FMTS) {
+                       /* we don't allow this sensor working with our bridge */
+                       kfree(sf);
+                       return -EINVAL;
+               }
+               sf[i] = bcap_formats[j];
+       }
+       bcap_dev->sensor_formats = sf;
+       bcap_dev->num_sensor_formats = num_formats;
+       return 0;
+}
+
+static void bcap_free_sensor_formats(struct bcap_device *bcap_dev)
+{
+       bcap_dev->num_sensor_formats = 0;
+       kfree(bcap_dev->sensor_formats);
+       bcap_dev->sensor_formats = NULL;
+}
+
+static int bcap_open(struct file *file)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct video_device *vfd = bcap_dev->video_dev;
+       struct bcap_fh *bcap_fh;
+
+       if (!bcap_dev->sd) {
+               v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n");
+               return -ENODEV;
+       }
+
+       bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL);
+       if (!bcap_fh) {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                        "unable to allocate memory for file handle object\n");
+               return -ENOMEM;
+       }
+
+       v4l2_fh_init(&bcap_fh->fh, vfd);
+
+       /* store pointer to v4l2_fh in private_data member of file */
+       file->private_data = &bcap_fh->fh;
+       v4l2_fh_add(&bcap_fh->fh);
+       bcap_fh->io_allowed = false;
+       return 0;
+}
+
+static int bcap_release(struct file *file)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_fh *fh = file->private_data;
+       struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
+
+       /* if this instance is doing IO */
+       if (bcap_fh->io_allowed)
+               vb2_queue_release(&bcap_dev->buffer_queue);
+
+       file->private_data = NULL;
+       v4l2_fh_del(&bcap_fh->fh);
+       v4l2_fh_exit(&bcap_fh->fh);
+       kfree(bcap_fh);
+       return 0;
+}
+
+static int bcap_mmap(struct file *file, struct vm_area_struct *vma)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       return vb2_mmap(&bcap_dev->buffer_queue, vma);
+}
+
+#ifndef CONFIG_MMU
+static unsigned long bcap_get_unmapped_area(struct file *file,
+                                           unsigned long addr,
+                                           unsigned long len,
+                                           unsigned long pgoff,
+                                           unsigned long flags)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       return vb2_get_unmapped_area(&bcap_dev->buffer_queue,
+                                    addr,
+                                    len,
+                                    pgoff,
+                                    flags);
+}
+#endif
+
+static unsigned int bcap_poll(struct file *file, poll_table *wait)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       return vb2_poll(&bcap_dev->buffer_queue, file, wait);
+}
+
+static int bcap_queue_setup(struct vb2_queue *vq,
+                               const struct v4l2_format *fmt,
+                               unsigned int *nbuffers, unsigned int *nplanes,
+                               unsigned int sizes[], void *alloc_ctxs[])
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+
+       if (*nbuffers < BCAP_MIN_NUM_BUF)
+               *nbuffers = BCAP_MIN_NUM_BUF;
+
+       *nplanes = 1;
+       sizes[0] = bcap_dev->fmt.sizeimage;
+       alloc_ctxs[0] = bcap_dev->alloc_ctx;
+
+       return 0;
+}
+
+static int bcap_buffer_init(struct vb2_buffer *vb)
+{
+       struct bcap_buffer *buf = to_bcap_vb(vb);
+
+       INIT_LIST_HEAD(&buf->list);
+       return 0;
+}
+
+static int bcap_buffer_prepare(struct vb2_buffer *vb)
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
+       struct bcap_buffer *buf = to_bcap_vb(vb);
+       unsigned long size;
+
+       size = bcap_dev->fmt.sizeimage;
+       if (vb2_plane_size(vb, 0) < size) {
+               v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n",
+                               vb2_plane_size(vb, 0), size);
+               return -EINVAL;
+       }
+       vb2_set_plane_payload(&buf->vb, 0, size);
+
+       return 0;
+}
+
+static void bcap_buffer_queue(struct vb2_buffer *vb)
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
+       struct bcap_buffer *buf = to_bcap_vb(vb);
+       unsigned long flags;
+
+       spin_lock_irqsave(&bcap_dev->lock, flags);
+       list_add_tail(&buf->list, &bcap_dev->dma_queue);
+       spin_unlock_irqrestore(&bcap_dev->lock, flags);
+}
+
+static void bcap_buffer_cleanup(struct vb2_buffer *vb)
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue);
+       struct bcap_buffer *buf = to_bcap_vb(vb);
+       unsigned long flags;
+
+       spin_lock_irqsave(&bcap_dev->lock, flags);
+       list_del_init(&buf->list);
+       spin_unlock_irqrestore(&bcap_dev->lock, flags);
+}
+
+static void bcap_lock(struct vb2_queue *vq)
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+       mutex_lock(&bcap_dev->mutex);
+}
+
+static void bcap_unlock(struct vb2_queue *vq)
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+       mutex_unlock(&bcap_dev->mutex);
+}
+
+static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+       struct ppi_if *ppi = bcap_dev->ppi;
+       struct ppi_params params;
+       int ret;
+
+       /* enable streamon on the sub device */
+       ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1);
+       if (ret && (ret != -ENOIOCTLCMD)) {
+               v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n");
+               return ret;
+       }
+
+       /* set ppi params */
+       params.width = bcap_dev->fmt.width;
+       params.height = bcap_dev->fmt.height;
+       params.bpp = bcap_dev->bpp;
+       params.ppi_control = bcap_dev->cfg->ppi_control;
+       params.int_mask = bcap_dev->cfg->int_mask;
+       params.blank_clocks = bcap_dev->cfg->blank_clocks;
+       ret = ppi->ops->set_params(ppi, &params);
+       if (ret < 0) {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "Error in setting ppi params\n");
+               return ret;
+       }
+
+       /* attach ppi DMA irq handler */
+       ret = ppi->ops->attach_irq(ppi, bcap_isr);
+       if (ret < 0) {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "Error in attaching interrupt handler\n");
+               return ret;
+       }
+
+       INIT_COMPLETION(bcap_dev->comp);
+       bcap_dev->stop = false;
+       return 0;
+}
+
+static int bcap_stop_streaming(struct vb2_queue *vq)
+{
+       struct bcap_device *bcap_dev = vb2_get_drv_priv(vq);
+       struct ppi_if *ppi = bcap_dev->ppi;
+       int ret;
+
+       if (!vb2_is_streaming(vq))
+               return 0;
+
+       bcap_dev->stop = true;
+       wait_for_completion(&bcap_dev->comp);
+       ppi->ops->stop(ppi);
+       ppi->ops->detach_irq(ppi);
+       ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0);
+       if (ret && (ret != -ENOIOCTLCMD))
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "stream off failed in subdev\n");
+
+       /* release all active buffers */
+       while (!list_empty(&bcap_dev->dma_queue)) {
+               bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
+                                               struct bcap_buffer, list);
+               list_del(&bcap_dev->next_frm->list);
+               vb2_buffer_done(&bcap_dev->next_frm->vb, VB2_BUF_STATE_ERROR);
+       }
+       return 0;
+}
+
+static struct vb2_ops bcap_video_qops = {
+       .queue_setup            = bcap_queue_setup,
+       .buf_init               = bcap_buffer_init,
+       .buf_prepare            = bcap_buffer_prepare,
+       .buf_cleanup            = bcap_buffer_cleanup,
+       .buf_queue              = bcap_buffer_queue,
+       .wait_prepare           = bcap_unlock,
+       .wait_finish            = bcap_lock,
+       .start_streaming        = bcap_start_streaming,
+       .stop_streaming         = bcap_stop_streaming,
+};
+
+static int bcap_reqbufs(struct file *file, void *priv,
+                       struct v4l2_requestbuffers *req_buf)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct vb2_queue *vq = &bcap_dev->buffer_queue;
+       struct v4l2_fh *fh = file->private_data;
+       struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
+
+       if (vb2_is_busy(vq))
+               return -EBUSY;
+
+       bcap_fh->io_allowed = true;
+
+       return vb2_reqbufs(vq, req_buf);
+}
+
+static int bcap_querybuf(struct file *file, void *priv,
+                               struct v4l2_buffer *buf)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       return vb2_querybuf(&bcap_dev->buffer_queue, buf);
+}
+
+static int bcap_qbuf(struct file *file, void *priv,
+                       struct v4l2_buffer *buf)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_fh *fh = file->private_data;
+       struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
+
+       if (!bcap_fh->io_allowed)
+               return -EBUSY;
+
+       return vb2_qbuf(&bcap_dev->buffer_queue, buf);
+}
+
+static int bcap_dqbuf(struct file *file, void *priv,
+                       struct v4l2_buffer *buf)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_fh *fh = file->private_data;
+       struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh);
+
+       if (!bcap_fh->io_allowed)
+               return -EBUSY;
+
+       return vb2_dqbuf(&bcap_dev->buffer_queue,
+                               buf, file->f_flags & O_NONBLOCK);
+}
+
+static irqreturn_t bcap_isr(int irq, void *dev_id)
+{
+       struct ppi_if *ppi = dev_id;
+       struct bcap_device *bcap_dev = ppi->priv;
+       struct timeval timevalue;
+       struct vb2_buffer *vb = &bcap_dev->cur_frm->vb;
+       dma_addr_t addr;
+
+       spin_lock(&bcap_dev->lock);
+
+       if (bcap_dev->cur_frm != bcap_dev->next_frm) {
+               do_gettimeofday(&timevalue);
+               vb->v4l2_buf.timestamp = timevalue;
+               vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+               bcap_dev->cur_frm = bcap_dev->next_frm;
+       }
+
+       ppi->ops->stop(ppi);
+
+       if (bcap_dev->stop) {
+               complete(&bcap_dev->comp);
+       } else {
+               if (!list_empty(&bcap_dev->dma_queue)) {
+                       bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
+                                               struct bcap_buffer, list);
+                       list_del(&bcap_dev->next_frm->list);
+                       addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->next_frm->vb, 0);
+                       ppi->ops->update_addr(ppi, (unsigned long)addr);
+               }
+               ppi->ops->start(ppi);
+       }
+
+       spin_unlock(&bcap_dev->lock);
+
+       return IRQ_HANDLED;
+}
+
+static int bcap_streamon(struct file *file, void *priv,
+                               enum v4l2_buf_type buf_type)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct bcap_fh *fh = file->private_data;
+       struct ppi_if *ppi = bcap_dev->ppi;
+       dma_addr_t addr;
+       int ret;
+
+       if (!fh->io_allowed)
+               return -EBUSY;
+
+       /* call streamon to start streaming in videobuf */
+       ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type);
+       if (ret)
+               return ret;
+
+       /* if dma queue is empty, return error */
+       if (list_empty(&bcap_dev->dma_queue)) {
+               v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n");
+               ret = -EINVAL;
+               goto err;
+       }
+
+       /* get the next frame from the dma queue */
+       bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next,
+                                       struct bcap_buffer, list);
+       bcap_dev->cur_frm = bcap_dev->next_frm;
+       /* remove buffer from the dma queue */
+       list_del(&bcap_dev->cur_frm->list);
+       addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0);
+       /* update DMA address */
+       ppi->ops->update_addr(ppi, (unsigned long)addr);
+       /* enable ppi */
+       ppi->ops->start(ppi);
+
+       return 0;
+err:
+       vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
+       return ret;
+}
+
+static int bcap_streamoff(struct file *file, void *priv,
+                               enum v4l2_buf_type buf_type)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct bcap_fh *fh = file->private_data;
+
+       if (!fh->io_allowed)
+               return -EBUSY;
+
+       return vb2_streamoff(&bcap_dev->buffer_queue, buf_type);
+}
+
+static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       return v4l2_subdev_call(bcap_dev->sd, video, querystd, std);
+}
+
+static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       *std = bcap_dev->std;
+       return 0;
+}
+
+static int bcap_s_std(struct file *file, void *priv, v4l2_std_id *std)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       int ret;
+
+       if (vb2_is_busy(&bcap_dev->buffer_queue))
+               return -EBUSY;
+
+       ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, *std);
+       if (ret < 0)
+               return ret;
+
+       bcap_dev->std = *std;
+       return 0;
+}
+
+static int bcap_enum_input(struct file *file, void *priv,
+                               struct v4l2_input *input)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct bfin_capture_config *config = bcap_dev->cfg;
+       int ret;
+       u32 status;
+
+       if (input->index >= config->num_inputs)
+               return -EINVAL;
+
+       *input = config->inputs[input->index];
+       /* get input status */
+       ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status);
+       if (!ret)
+               input->status = status;
+       return 0;
+}
+
+static int bcap_g_input(struct file *file, void *priv, unsigned int *index)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       *index = bcap_dev->cur_input;
+       return 0;
+}
+
+static int bcap_s_input(struct file *file, void *priv, unsigned int index)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct bfin_capture_config *config = bcap_dev->cfg;
+       struct bcap_route *route;
+       int ret;
+
+       if (vb2_is_busy(&bcap_dev->buffer_queue))
+               return -EBUSY;
+
+       if (index >= config->num_inputs)
+               return -EINVAL;
+
+       route = &config->routes[index];
+       ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing,
+                               route->input, route->output, 0);
+       if ((ret < 0) && (ret != -ENOIOCTLCMD)) {
+               v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n");
+               return ret;
+       }
+       bcap_dev->cur_input = index;
+       return 0;
+}
+
+static int bcap_try_format(struct bcap_device *bcap,
+                               struct v4l2_pix_format *pixfmt,
+                               enum v4l2_mbus_pixelcode *mbus_code,
+                               int *bpp)
+{
+       struct bcap_format *sf = bcap->sensor_formats;
+       struct bcap_format *fmt = NULL;
+       struct v4l2_mbus_framefmt mbus_fmt;
+       int ret, i;
+
+       for (i = 0; i < bcap->num_sensor_formats; i++) {
+               fmt = &sf[i];
+               if (pixfmt->pixelformat == fmt->pixelformat)
+                       break;
+       }
+       if (i == bcap->num_sensor_formats)
+               fmt = &sf[0];
+
+       if (mbus_code)
+               *mbus_code = fmt->mbus_code;
+       if (bpp)
+               *bpp = fmt->bpp;
+       v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code);
+       ret = v4l2_subdev_call(bcap->sd, video,
+                               try_mbus_fmt, &mbus_fmt);
+       if (ret < 0)
+               return ret;
+       v4l2_fill_pix_format(pixfmt, &mbus_fmt);
+       pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8;
+       pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
+       return 0;
+}
+
+static int bcap_enum_fmt_vid_cap(struct file *file, void  *priv,
+                                       struct v4l2_fmtdesc *fmt)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct bcap_format *sf = bcap_dev->sensor_formats;
+
+       if (fmt->index >= bcap_dev->num_sensor_formats)
+               return -EINVAL;
+
+       fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+       strlcpy(fmt->description,
+               sf[fmt->index].desc,
+               sizeof(fmt->description));
+       fmt->pixelformat = sf[fmt->index].pixelformat;
+       return 0;
+}
+
+static int bcap_try_fmt_vid_cap(struct file *file, void *priv,
+                                       struct v4l2_format *fmt)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
+
+       return bcap_try_format(bcap_dev, pixfmt, NULL, NULL);
+}
+
+static int bcap_g_fmt_vid_cap(struct file *file, void *priv,
+                               struct v4l2_format *fmt)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       fmt->fmt.pix = bcap_dev->fmt;
+       return 0;
+}
+
+static int bcap_s_fmt_vid_cap(struct file *file, void *priv,
+                               struct v4l2_format *fmt)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       struct v4l2_mbus_framefmt mbus_fmt;
+       enum v4l2_mbus_pixelcode mbus_code;
+       struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
+       int ret, bpp;
+
+       if (vb2_is_busy(&bcap_dev->buffer_queue))
+               return -EBUSY;
+
+       /* see if format works */
+       ret = bcap_try_format(bcap_dev, pixfmt, &mbus_code, &bpp);
+       if (ret < 0)
+               return ret;
+
+       v4l2_fill_mbus_format(&mbus_fmt, pixfmt, mbus_code);
+       ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt);
+       if (ret < 0)
+               return ret;
+       bcap_dev->fmt = *pixfmt;
+       bcap_dev->bpp = bpp;
+       return 0;
+}
+
+static int bcap_querycap(struct file *file, void  *priv,
+                               struct v4l2_capability *cap)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+       strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
+       strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info));
+       strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card));
+       return 0;
+}
+
+static int bcap_g_parm(struct file *file, void *fh,
+                               struct v4l2_streamparm *a)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+               return -EINVAL;
+       return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a);
+}
+
+static int bcap_s_parm(struct file *file, void *fh,
+                               struct v4l2_streamparm *a)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+               return -EINVAL;
+       return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a);
+}
+
+static int bcap_g_chip_ident(struct file *file, void *priv,
+               struct v4l2_dbg_chip_ident *chip)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       chip->ident = V4L2_IDENT_NONE;
+       chip->revision = 0;
+       if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
+                       chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
+               return -EINVAL;
+
+       return v4l2_subdev_call(bcap_dev->sd, core,
+                       g_chip_ident, chip);
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int bcap_dbg_g_register(struct file *file, void *priv,
+               struct v4l2_dbg_register *reg)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       return v4l2_subdev_call(bcap_dev->sd, core,
+                       g_register, reg);
+}
+
+static int bcap_dbg_s_register(struct file *file, void *priv,
+               struct v4l2_dbg_register *reg)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+
+       return v4l2_subdev_call(bcap_dev->sd, core,
+                       s_register, reg);
+}
+#endif
+
+static int bcap_log_status(struct file *file, void *priv)
+{
+       struct bcap_device *bcap_dev = video_drvdata(file);
+       /* status for sub devices */
+       v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status);
+       return 0;
+}
+
+static const struct v4l2_ioctl_ops bcap_ioctl_ops = {
+       .vidioc_querycap         = bcap_querycap,
+       .vidioc_g_fmt_vid_cap    = bcap_g_fmt_vid_cap,
+       .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap,
+       .vidioc_s_fmt_vid_cap    = bcap_s_fmt_vid_cap,
+       .vidioc_try_fmt_vid_cap  = bcap_try_fmt_vid_cap,
+       .vidioc_enum_input       = bcap_enum_input,
+       .vidioc_g_input          = bcap_g_input,
+       .vidioc_s_input          = bcap_s_input,
+       .vidioc_querystd         = bcap_querystd,
+       .vidioc_s_std            = bcap_s_std,
+       .vidioc_g_std            = bcap_g_std,
+       .vidioc_reqbufs          = bcap_reqbufs,
+       .vidioc_querybuf         = bcap_querybuf,
+       .vidioc_qbuf             = bcap_qbuf,
+       .vidioc_dqbuf            = bcap_dqbuf,
+       .vidioc_streamon         = bcap_streamon,
+       .vidioc_streamoff        = bcap_streamoff,
+       .vidioc_g_parm           = bcap_g_parm,
+       .vidioc_s_parm           = bcap_s_parm,
+       .vidioc_g_chip_ident     = bcap_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       .vidioc_g_register       = bcap_dbg_g_register,
+       .vidioc_s_register       = bcap_dbg_s_register,
+#endif
+       .vidioc_log_status       = bcap_log_status,
+};
+
+static struct v4l2_file_operations bcap_fops = {
+       .owner = THIS_MODULE,
+       .open = bcap_open,
+       .release = bcap_release,
+       .unlocked_ioctl = video_ioctl2,
+       .mmap = bcap_mmap,
+#ifndef CONFIG_MMU
+       .get_unmapped_area = bcap_get_unmapped_area,
+#endif
+       .poll = bcap_poll
+};
+
+static int __devinit bcap_probe(struct platform_device *pdev)
+{
+       struct bcap_device *bcap_dev;
+       struct video_device *vfd;
+       struct i2c_adapter *i2c_adap;
+       struct bfin_capture_config *config;
+       struct vb2_queue *q;
+       int ret;
+
+       config = pdev->dev.platform_data;
+       if (!config) {
+               v4l2_err(pdev->dev.driver, "Unable to get board config\n");
+               return -ENODEV;
+       }
+
+       bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL);
+       if (!bcap_dev) {
+               v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n");
+               return -ENOMEM;
+       }
+
+       bcap_dev->cfg = config;
+
+       bcap_dev->ppi = ppi_create_instance(config->ppi_info);
+       if (!bcap_dev->ppi) {
+               v4l2_err(pdev->dev.driver, "Unable to create ppi\n");
+               ret = -ENODEV;
+               goto err_free_dev;
+       }
+       bcap_dev->ppi->priv = bcap_dev;
+
+       bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+       if (IS_ERR(bcap_dev->alloc_ctx)) {
+               ret = PTR_ERR(bcap_dev->alloc_ctx);
+               goto err_free_ppi;
+       }
+
+       vfd = video_device_alloc();
+       if (!vfd) {
+               ret = -ENOMEM;
+               v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
+               goto err_cleanup_ctx;
+       }
+
+       /* initialize field of video device */
+       vfd->release            = video_device_release;
+       vfd->fops               = &bcap_fops;
+       vfd->ioctl_ops          = &bcap_ioctl_ops;
+       vfd->tvnorms            = 0;
+       vfd->v4l2_dev           = &bcap_dev->v4l2_dev;
+       set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
+       strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name));
+       bcap_dev->video_dev     = vfd;
+
+       ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev);
+       if (ret) {
+               v4l2_err(pdev->dev.driver,
+                               "Unable to register v4l2 device\n");
+               goto err_release_vdev;
+       }
+       v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n");
+
+       bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler;
+       ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0);
+       if (ret) {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "Unable to init control handler\n");
+               goto err_unreg_v4l2;
+       }
+
+       spin_lock_init(&bcap_dev->lock);
+       /* initialize queue */
+       q = &bcap_dev->buffer_queue;
+       q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+       q->io_modes = VB2_MMAP;
+       q->drv_priv = bcap_dev;
+       q->buf_struct_size = sizeof(struct bcap_buffer);
+       q->ops = &bcap_video_qops;
+       q->mem_ops = &vb2_dma_contig_memops;
+
+       vb2_queue_init(q);
+
+       mutex_init(&bcap_dev->mutex);
+       init_completion(&bcap_dev->comp);
+
+       /* init video dma queues */
+       INIT_LIST_HEAD(&bcap_dev->dma_queue);
+
+       vfd->lock = &bcap_dev->mutex;
+
+       /* register video device */
+       ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1);
+       if (ret) {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "Unable to register video device\n");
+               goto err_free_handler;
+       }
+       video_set_drvdata(bcap_dev->video_dev, bcap_dev);
+       v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n",
+                       video_device_node_name(vfd));
+
+       /* load up the subdevice */
+       i2c_adap = i2c_get_adapter(config->i2c_adapter_id);
+       if (!i2c_adap) {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "Unable to find i2c adapter\n");
+               goto err_unreg_vdev;
+
+       }
+       bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev,
+                                                i2c_adap,
+                                                &config->board_info,
+                                                NULL);
+       if (bcap_dev->sd) {
+               int i;
+               /* update tvnorms from the sub devices */
+               for (i = 0; i < config->num_inputs; i++)
+                       vfd->tvnorms |= config->inputs[i].std;
+       } else {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "Unable to register sub device\n");
+               goto err_unreg_vdev;
+       }
+
+       v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n");
+
+       /* now we can probe the default state */
+       if (vfd->tvnorms) {
+               v4l2_std_id std;
+               ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std);
+               if (ret) {
+                       v4l2_err(&bcap_dev->v4l2_dev,
+                                       "Unable to get std\n");
+                       goto err_unreg_vdev;
+               }
+               bcap_dev->std = std;
+       }
+       ret = bcap_init_sensor_formats(bcap_dev);
+       if (ret) {
+               v4l2_err(&bcap_dev->v4l2_dev,
+                               "Unable to create sensor formats table\n");
+               goto err_unreg_vdev;
+       }
+       return 0;
+err_unreg_vdev:
+       video_unregister_device(bcap_dev->video_dev);
+       bcap_dev->video_dev = NULL;
+err_free_handler:
+       v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
+err_unreg_v4l2:
+       v4l2_device_unregister(&bcap_dev->v4l2_dev);
+err_release_vdev:
+       if (bcap_dev->video_dev)
+               video_device_release(bcap_dev->video_dev);
+err_cleanup_ctx:
+       vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
+err_free_ppi:
+       ppi_delete_instance(bcap_dev->ppi);
+err_free_dev:
+       kfree(bcap_dev);
+       return ret;
+}
+
+static int __devexit bcap_remove(struct platform_device *pdev)
+{
+       struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+       struct bcap_device *bcap_dev = container_of(v4l2_dev,
+                                               struct bcap_device, v4l2_dev);
+
+       bcap_free_sensor_formats(bcap_dev);
+       video_unregister_device(bcap_dev->video_dev);
+       v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler);
+       v4l2_device_unregister(v4l2_dev);
+       vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx);
+       ppi_delete_instance(bcap_dev->ppi);
+       kfree(bcap_dev);
+       return 0;
+}
+
+static struct platform_driver bcap_driver = {
+       .driver = {
+               .name  = CAPTURE_DRV_NAME,
+               .owner = THIS_MODULE,
+       },
+       .probe = bcap_probe,
+       .remove = __devexit_p(bcap_remove),
+};
+
+static __init int bcap_init(void)
+{
+       return platform_driver_register(&bcap_driver);
+}
+
+static __exit void bcap_exit(void)
+{
+       platform_driver_unregister(&bcap_driver);
+}
+
+module_init(bcap_init);
+module_exit(bcap_exit);
+
+MODULE_DESCRIPTION("Analog Devices blackfin video capture driver");
+MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/video/blackfin/ppi.c b/drivers/media/video/blackfin/ppi.c
new file mode 100644 (file)
index 0000000..d295921
--- /dev/null
@@ -0,0 +1,271 @@
+/*
+ * ppi.c Analog Devices Parallel Peripheral Interface driver
+ *
+ * Copyright (c) 2011 Analog Devices Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/slab.h>
+
+#include <asm/bfin_ppi.h>
+#include <asm/blackfin.h>
+#include <asm/cacheflush.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+#include <media/blackfin/ppi.h>
+
+static int ppi_attach_irq(struct ppi_if *ppi, irq_handler_t handler);
+static void ppi_detach_irq(struct ppi_if *ppi);
+static int ppi_start(struct ppi_if *ppi);
+static int ppi_stop(struct ppi_if *ppi);
+static int ppi_set_params(struct ppi_if *ppi, struct ppi_params *params);
+static void ppi_update_addr(struct ppi_if *ppi, unsigned long addr);
+
+static const struct ppi_ops ppi_ops = {
+       .attach_irq = ppi_attach_irq,
+       .detach_irq = ppi_detach_irq,
+       .start = ppi_start,
+       .stop = ppi_stop,
+       .set_params = ppi_set_params,
+       .update_addr = ppi_update_addr,
+};
+
+static irqreturn_t ppi_irq_err(int irq, void *dev_id)
+{
+       struct ppi_if *ppi = dev_id;
+       const struct ppi_info *info = ppi->info;
+
+       switch (info->type) {
+       case PPI_TYPE_PPI:
+       {
+               struct bfin_ppi_regs *reg = info->base;
+               unsigned short status;
+
+               /* register on bf561 is cleared when read 
+                * others are W1C
+                */
+               status = bfin_read16(&reg->status);
+               bfin_write16(&reg->status, 0xff00);
+               break;
+       }
+       case PPI_TYPE_EPPI:
+       {
+               struct bfin_eppi_regs *reg = info->base;
+               bfin_write16(&reg->status, 0xffff);
+               break;
+       }
+       default:
+               break;
+       }
+
+       return IRQ_HANDLED;
+}
+
+static int ppi_attach_irq(struct ppi_if *ppi, irq_handler_t handler)
+{
+       const struct ppi_info *info = ppi->info;
+       int ret;
+
+       ret = request_dma(info->dma_ch, "PPI_DMA");
+
+       if (ret) {
+               pr_err("Unable to allocate DMA channel for PPI\n");
+               return ret;
+       }
+       set_dma_callback(info->dma_ch, handler, ppi);
+
+       if (ppi->err_int) {
+               ret = request_irq(info->irq_err, ppi_irq_err, 0, "PPI ERROR", ppi);
+               if (ret) {
+                       pr_err("Unable to allocate IRQ for PPI\n");
+                       free_dma(info->dma_ch);
+               }
+       }
+       return ret;
+}
+
+static void ppi_detach_irq(struct ppi_if *ppi)
+{
+       const struct ppi_info *info = ppi->info;
+
+       if (ppi->err_int)
+               free_irq(info->irq_err, ppi);
+       free_dma(info->dma_ch);
+}
+
+static int ppi_start(struct ppi_if *ppi)
+{
+       const struct ppi_info *info = ppi->info;
+
+       /* enable DMA */
+       enable_dma(info->dma_ch);
+
+       /* enable PPI */
+       ppi->ppi_control |= PORT_EN;
+       switch (info->type) {
+       case PPI_TYPE_PPI:
+       {
+               struct bfin_ppi_regs *reg = info->base;
+               bfin_write16(&reg->control, ppi->ppi_control);
+               break;
+       }
+       case PPI_TYPE_EPPI:
+       {
+               struct bfin_eppi_regs *reg = info->base;
+               bfin_write32(&reg->control, ppi->ppi_control);
+               break;
+       }
+       default:
+               return -EINVAL;
+       }
+
+       SSYNC();
+       return 0;
+}
+
+static int ppi_stop(struct ppi_if *ppi)
+{
+       const struct ppi_info *info = ppi->info;
+
+       /* disable PPI */
+       ppi->ppi_control &= ~PORT_EN;
+       switch (info->type) {
+       case PPI_TYPE_PPI:
+       {
+               struct bfin_ppi_regs *reg = info->base;
+               bfin_write16(&reg->control, ppi->ppi_control);
+               break;
+       }
+       case PPI_TYPE_EPPI:
+       {
+               struct bfin_eppi_regs *reg = info->base;
+               bfin_write32(&reg->control, ppi->ppi_control);
+               break;
+       }
+       default:
+               return -EINVAL;
+       }
+
+       /* disable DMA */
+       clear_dma_irqstat(info->dma_ch);
+       disable_dma(info->dma_ch);
+
+       SSYNC();
+       return 0;
+}
+
+static int ppi_set_params(struct ppi_if *ppi, struct ppi_params *params)
+{
+       const struct ppi_info *info = ppi->info;
+       int dma32 = 0;
+       int dma_config, bytes_per_line, lines_per_frame;
+
+       bytes_per_line = params->width * params->bpp / 8;
+       lines_per_frame = params->height;
+       if (params->int_mask == 0xFFFFFFFF)
+               ppi->err_int = false;
+       else
+               ppi->err_int = true;
+
+       dma_config = (DMA_FLOW_STOP | WNR | RESTART | DMA2D | DI_EN);
+       ppi->ppi_control = params->ppi_control & ~PORT_EN;
+       switch (info->type) {
+       case PPI_TYPE_PPI:
+       {
+               struct bfin_ppi_regs *reg = info->base;
+
+               if (params->ppi_control & DMA32)
+                       dma32 = 1;
+
+               bfin_write16(&reg->control, ppi->ppi_control);
+               bfin_write16(&reg->count, bytes_per_line - 1);
+               bfin_write16(&reg->frame, lines_per_frame);
+               break;
+       }
+       case PPI_TYPE_EPPI:
+       {
+               struct bfin_eppi_regs *reg = info->base;
+
+               if ((params->ppi_control & PACK_EN)
+                       || (params->ppi_control & 0x38000) > DLEN_16)
+                       dma32 = 1;
+
+               bfin_write32(&reg->control, ppi->ppi_control);
+               bfin_write16(&reg->line, bytes_per_line + params->blank_clocks);
+               bfin_write16(&reg->frame, lines_per_frame);
+               bfin_write16(&reg->hdelay, 0);
+               bfin_write16(&reg->vdelay, 0);
+               bfin_write16(&reg->hcount, bytes_per_line);
+               bfin_write16(&reg->vcount, lines_per_frame);
+               break;
+       }
+       default:
+               return -EINVAL;
+       }
+
+       if (dma32) {
+               dma_config |= WDSIZE_32;
+               set_dma_x_count(info->dma_ch, bytes_per_line >> 2);
+               set_dma_x_modify(info->dma_ch, 4);
+               set_dma_y_modify(info->dma_ch, 4);
+       } else {
+               dma_config |= WDSIZE_16;
+               set_dma_x_count(info->dma_ch, bytes_per_line >> 1);
+               set_dma_x_modify(info->dma_ch, 2);
+               set_dma_y_modify(info->dma_ch, 2);
+       }
+       set_dma_y_count(info->dma_ch, lines_per_frame);
+       set_dma_config(info->dma_ch, dma_config);
+
+       SSYNC();
+       return 0;
+}
+
+static void ppi_update_addr(struct ppi_if *ppi, unsigned long addr)
+{
+       set_dma_start_addr(ppi->info->dma_ch, addr);
+}
+
+struct ppi_if *ppi_create_instance(const struct ppi_info *info)
+{
+       struct ppi_if *ppi;
+
+       if (!info || !info->pin_req)
+               return NULL;
+
+       if (peripheral_request_list(info->pin_req, KBUILD_MODNAME)) {
+               pr_err("request peripheral failed\n");
+               return NULL;
+       }
+
+       ppi = kzalloc(sizeof(*ppi), GFP_KERNEL);
+       if (!ppi) {
+               peripheral_free_list(info->pin_req);
+               pr_err("unable to allocate memory for ppi handle\n");
+               return NULL;
+       }
+       ppi->ops = &ppi_ops;
+       ppi->info = info;
+
+       pr_info("ppi probe success\n");
+       return ppi;
+}
+
+void ppi_delete_instance(struct ppi_if *ppi)
+{
+       peripheral_free_list(ppi->info->pin_req);
+       kfree(ppi);
+}
diff --git a/include/media/blackfin/bfin_capture.h b/include/media/blackfin/bfin_capture.h
new file mode 100644 (file)
index 0000000..2038a8a
--- /dev/null
@@ -0,0 +1,37 @@
+#ifndef _BFIN_CAPTURE_H_
+#define _BFIN_CAPTURE_H_
+
+#include <linux/i2c.h>
+
+struct v4l2_input;
+struct ppi_info;
+
+struct bcap_route {
+       u32 input;
+       u32 output;
+};
+
+struct bfin_capture_config {
+       /* card name */
+       char *card_name;
+       /* inputs available at the sub device */
+       struct v4l2_input *inputs;
+       /* number of inputs supported */
+       int num_inputs;
+       /* routing information for each input */
+       struct bcap_route *routes;
+       /* i2c bus adapter no */
+       int i2c_adapter_id;
+       /* i2c subdevice board info */
+       struct i2c_board_info board_info;
+       /* ppi board info */
+       const struct ppi_info *ppi_info;
+       /* ppi control */
+       unsigned long ppi_control;
+       /* ppi interrupt mask */
+       u32 int_mask;
+       /* horizontal blanking clocks */
+       int blank_clocks;
+};
+
+#endif
diff --git a/include/media/blackfin/ppi.h b/include/media/blackfin/ppi.h
new file mode 100644 (file)
index 0000000..8f72f8a
--- /dev/null
@@ -0,0 +1,74 @@
+/*
+ * Analog Devices PPI header file
+ *
+ * Copyright (c) 2011 Analog Devices Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _PPI_H_
+#define _PPI_H_
+
+#include <linux/interrupt.h>
+
+#ifdef EPPI_EN
+#define PORT_EN EPPI_EN
+#define DMA32 0
+#define PACK_EN PACKEN
+#endif
+
+struct ppi_if;
+
+struct ppi_params {
+       int width;
+       int height;
+       int bpp;
+       unsigned long ppi_control;
+       u32 int_mask;
+       int blank_clocks;
+};
+
+struct ppi_ops {
+       int (*attach_irq)(struct ppi_if *ppi, irq_handler_t handler);
+       void (*detach_irq)(struct ppi_if *ppi);
+       int (*start)(struct ppi_if *ppi);
+       int (*stop)(struct ppi_if *ppi);
+       int (*set_params)(struct ppi_if *ppi, struct ppi_params *params);
+       void (*update_addr)(struct ppi_if *ppi, unsigned long addr);
+};
+
+enum ppi_type {
+       PPI_TYPE_PPI,
+       PPI_TYPE_EPPI,
+};
+
+struct ppi_info {
+       enum ppi_type type;
+       int dma_ch;
+       int irq_err;
+       void __iomem *base;
+       const unsigned short *pin_req;
+};
+
+struct ppi_if {
+       unsigned long ppi_control;
+       const struct ppi_ops *ops;
+       const struct ppi_info *info;
+       bool err_int;
+       void *priv;
+};
+
+struct ppi_if *ppi_create_instance(const struct ppi_info *info);
+void ppi_delete_instance(struct ppi_if *ppi);
+#endif