V4L/DVB (12730): Add conexant cx25821 driver

GIT_BRANCH=devel
GIT_AUTHOR_DATE=1252851239
GIT_AUTHOR_NAME=Palash Bandyopadhyay
GIT_AUTHOR_EMAIL=Palash.Bandyopadhyay@conexant.com
Add conexant cx25821 driver release v106 of the Athena driver.

Signed-off-by: Palash Bandyopadhyay <palash.bandyopadhyay@conexant.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 500 insertions, 0 deletions

diff --git a/drivers/staging/cx25821/cx25821-videoioctl.c b/drivers/staging/cx25821/cx25821-videoioctl.c
new file mode 100644
index 000000000000..a5363e486f7a
--- /dev/null
+++ b/drivers/staging/cx25821/cx25821-videoioctl.c
@@ -0,0 +1,500 @@
+/*
+ *  Driver for the Conexant CX25821 PCIe bridge
+ *
+ *  Copyright (C) 2009 Conexant Systems Inc. 
+ *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
+ *  Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
+ *
+ *  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.
+ *
+ *  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 "cx25821-video.h"
+
+
+static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+    struct cx25821_buffer   *buf = container_of(vb, struct cx25821_buffer, vb);
+    struct cx25821_buffer   *prev;
+    struct cx25821_fh       *fh   = vq->priv_data;
+    struct cx25821_dev      *dev  = fh->dev;
+    struct cx25821_dmaqueue *q    = &dev->vidq[VIDEO_IOCTL_CH];
+
+    /* add jump to stopper */
+    buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
+    buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
+    buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
+
+    dprintk(2, "jmp to stopper (0x%x)\n", buf->risc.jmp[1]);
+
+    if (!list_empty(&q->queued)) {
+        list_add_tail(&buf->vb.queue, &q->queued);
+        buf->vb.state = VIDEOBUF_QUEUED;
+        dprintk(2, "[%p/%d] buffer_queue - append to queued\n", buf, buf->vb.i);
+
+    } else if (list_empty(&q->active)) {
+        list_add_tail(&buf->vb.queue, &q->active);
+        cx25821_start_video_dma(dev, q, buf, &dev->sram_channels[VIDEO_IOCTL_CH]);
+        buf->vb.state = VIDEOBUF_ACTIVE;
+        buf->count    = q->count++;
+        mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
+        dprintk(2, "[%p/%d] buffer_queue - first active, buf cnt = %d, q->count = %d\n",
+                                buf, buf->vb. i, buf->count, q->count);
+    } else {
+        prev = list_entry(q->active.prev, struct cx25821_buffer, 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, &q->active);
+            buf->vb.state = VIDEOBUF_ACTIVE;
+            buf->count    = q->count++;
+            prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
+
+            /* 64 bit bits 63-32 */
+            prev->risc.jmp[2] = cpu_to_le32(0);
+            dprintk(2, "[%p/%d] buffer_queue - append to active, buf->count=%d\n",  buf, buf->vb.i, buf->count);
+
+        } else {
+            list_add_tail(&buf->vb.queue, &q->queued);
+            buf->vb.state = VIDEOBUF_QUEUED;
+            dprintk(2, "[%p/%d] buffer_queue - first queued\n", buf, buf->vb.i);
+        }
+    }
+
+    if (list_empty(&q->active))
+    {
+       dprintk(2, "active queue empty!\n");
+    }
+}
+
+
+static struct videobuf_queue_ops cx25821_video_qops = {
+    .buf_setup    = buffer_setup,
+    .buf_prepare  = buffer_prepare,
+    .buf_queue    = buffer_queue,
+    .buf_release  = buffer_release,
+};
+
+
+static int video_open(struct file *file)
+{
+    int minor = video_devdata(file)->minor;
+    struct cx25821_dev *h, *dev = NULL;
+    struct cx25821_fh *fh;
+    struct list_head *list;
+    enum v4l2_buf_type type = 0;
+    u32 pix_format;
+
+    lock_kernel();
+    list_for_each(list, &cx25821_devlist)
+    {
+        h = list_entry(list, struct cx25821_dev, devlist);
+
+        if (h->ioctl_dev && h->ioctl_dev->minor == minor)
+        {
+            dev  = h;
+            type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+        }
+    }
+
+    if (NULL == dev) {
+        unlock_kernel();
+        return -ENODEV;
+    }
+
+    printk("open minor=%d type=%s\n", minor, v4l2_type_names[type]);
+
+    /* allocate + initialize per filehandle data */
+    fh = kzalloc(sizeof(*fh), GFP_KERNEL);
+    if (NULL == fh) {
+        unlock_kernel();
+        return -ENOMEM;
+    }
+
+    file->private_data = fh;
+    fh->dev      = dev;
+    fh->type     = type;
+    fh->width    = 720;
+
+    if(dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK)
+        fh->height = 576;
+    else
+        fh->height = 480;
+
+    dev->channel_opened = VIDEO_IOCTL_CH;
+    pix_format          = V4L2_PIX_FMT_YUYV;
+    fh->fmt             = format_by_fourcc(pix_format);
+    
+    v4l2_prio_open(&dev->prio,&fh->prio);
+
+    videobuf_queue_sg_init(&fh->vidq, &cx25821_video_qops,
+                &dev->pci->dev, &dev->slock,
+                V4L2_BUF_TYPE_VIDEO_CAPTURE,
+                V4L2_FIELD_INTERLACED,
+                sizeof(struct cx25821_buffer),
+                fh);
+
+    dprintk(1, "post videobuf_queue_init()\n");
+    unlock_kernel();
+
+    return 0;
+}
+
+static ssize_t video_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
+{
+    struct cx25821_fh *fh = file->private_data;
+
+    switch (fh->type)
+    {
+        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+            if (res_locked(fh->dev, RESOURCE_VIDEO_IOCTL))
+                return -EBUSY;
+
+            return videobuf_read_one(&fh->vidq, data, count, ppos, file->f_flags & O_NONBLOCK);
+
+        default:
+            BUG();
+            return 0;
+    }
+}
+
+static unsigned int video_poll(struct file *file, struct poll_table_struct *wait)
+{
+    struct cx25821_fh *fh = file->private_data;
+    struct cx25821_buffer *buf;
+
+    if (res_check(fh, RESOURCE_VIDEO_IOCTL)) {
+        /* streaming capture */
+        if (list_empty(&fh->vidq.stream))
+            return POLLERR;
+        buf = list_entry(fh->vidq.stream.next,
+            struct cx25821_buffer, vb.stream);
+    } else {
+        /* read() capture */
+        buf = (struct cx25821_buffer *)fh->vidq.read_buf;
+        if (NULL == buf)
+            return POLLERR;
+    }
+
+    poll_wait(file, &buf->vb.done, wait);
+    if (buf->vb.state == VIDEOBUF_DONE || buf->vb.state == VIDEOBUF_ERROR)       
+        return POLLIN|POLLRDNORM;
+    
+    return 0;
+}
+
+
+static int video_release(struct file *file)
+{
+    struct cx25821_fh *fh = file->private_data;
+    struct cx25821_dev *dev = fh->dev; 
+
+    /* stop video capture */
+    if (res_check(fh, RESOURCE_VIDEO_IOCTL)) {
+        videobuf_queue_cancel(&fh->vidq);
+        res_free(dev, fh, RESOURCE_VIDEO_IOCTL);
+    }
+
+    if (fh->vidq.read_buf) {
+        buffer_release(&fh->vidq, fh->vidq.read_buf);
+        kfree(fh->vidq.read_buf);
+    }
+
+    videobuf_mmap_free(&fh->vidq);
+
+    v4l2_prio_close(&dev->prio,&fh->prio);
+
+    file->private_data = NULL;
+    kfree(fh);
+
+    return 0;
+}
+
+
+static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+    struct cx25821_fh *fh = priv;
+    struct cx25821_dev *dev = fh->dev;
+
+    if (unlikely(fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE))
+    {
+        return -EINVAL;
+    }
+
+    if (unlikely(i != fh->type))
+    {
+        return -EINVAL;
+    }
+
+    if (unlikely(!res_get(dev, fh, get_resource(fh, RESOURCE_VIDEO_IOCTL))))
+    {
+        return -EBUSY;
+    }
+
+    return videobuf_streamon(get_queue(fh));
+}
+
+static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
+{
+    struct cx25821_fh *fh = priv;
+    struct cx25821_dev *dev = fh->dev;
+    int err, res;
+
+    if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+        return -EINVAL;
+    if (i != fh->type)
+        return -EINVAL;
+
+    res = get_resource(fh, RESOURCE_VIDEO_IOCTL);
+    err = videobuf_streamoff(get_queue(fh));
+    if (err < 0)
+        return err;
+    res_free(dev, fh, res);
+    return 0;
+}
+
+
+static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
+{
+    struct cx25821_fh *fh = priv;
+    struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
+    int err;
+
+    if (fh) 
+    {
+        err = v4l2_prio_check(&dev->prio, &fh->prio);
+        if (0 != err)
+            return err;
+    }
+
+    dprintk(2, "%s()\n", __func__);
+    err = vidioc_try_fmt_vid_cap(file, priv, f);
+
+    if (0 != err)
+        return err;
+    fh->fmt        = format_by_fourcc(f->fmt.pix.pixelformat);
+    fh->width      = f->fmt.pix.width;
+    fh->height     = f->fmt.pix.height;
+    fh->vidq.field = f->fmt.pix.field;
+    dprintk(2, "%s() width=%d height=%d field=%d\n", __func__, fh->width, fh->height, fh->vidq.field);
+    cx25821_call_all(dev, video, s_fmt, f);
+    return 0;
+}
+
+static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
+{
+    struct cx25821_fh *fh = priv;
+    return videobuf_dqbuf(get_queue(fh), p, file->f_flags & O_NONBLOCK);
+}
+
+static long video_ioctl_set(struct file *file, unsigned int cmd, unsigned long arg)   
+{   
+    struct cx25821_fh *fh = file->private_data;
+    struct cx25821_dev *dev = fh->dev;
+    struct downstream_user_struct *data_from_user;
+    int command;
+    int width = 720;
+    int selected_channel = 0, pix_format = 0, i = 0;
+    int cif_enable = 0, cif_width = 0;
+    u32 value = 0;
+
+    
+    data_from_user = (struct downstream_user_struct *)arg;
+    
+    if( !data_from_user )
+    {
+        printk("cx25821 in %s(): User data is INVALID. Returning.\n", __func__);
+        return 0;
+    }
+    
+    command = data_from_user->command;
+    
+    if( command != SET_VIDEO_STD && command != SET_PIXEL_FORMAT && command != ENABLE_CIF_RESOLUTION  && 
+        command != REG_READ && command != REG_WRITE && command != MEDUSA_READ && command != MEDUSA_WRITE)
+    {
+        return 0;
+    }
+                         
+                         
+    switch(command)
+    {             
+        case SET_VIDEO_STD:    
+            dev->tvnorm = !strcmp(data_from_user->vid_stdname,"PAL") ? V4L2_STD_PAL_BG : V4L2_STD_NTSC_M;          
+            medusa_set_videostandard(dev);
+            break; 
+            
+        case SET_PIXEL_FORMAT:       
+            selected_channel    = data_from_user->decoder_select;  
+            pix_format          = data_from_user->pixel_format;
+
+            if( !(selected_channel <= 7 && selected_channel >= 0) )
+            {              
+                selected_channel -= 4;
+                selected_channel = selected_channel % 8;
+            }   
+            
+            if( selected_channel >= 0 )
+                cx25821_set_pixel_format( dev, selected_channel, pix_format ); 
+                           
+            break;
+            
+        case ENABLE_CIF_RESOLUTION:    
+            selected_channel    = data_from_user->decoder_select;
+            cif_enable          = data_from_user->cif_resolution_enable;
+            cif_width           = data_from_user->cif_width;            
+            
+            if( cif_enable )
+            {
+                if( dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK )
+                    width = 352;
+                else
+                    width = (cif_width == 320 || cif_width == 352) ? cif_width : 320;
+            }
+            
+            if( !(selected_channel <= 7 && selected_channel >= 0) )
+            {
+                selected_channel -= 4;
+                selected_channel = selected_channel % 8;   
+            }
+            
+            
+            if( selected_channel <= 7 && selected_channel >= 0 )
+            {
+                dev->use_cif_resolution[selected_channel] = cif_enable;
+                dev->cif_width[selected_channel]          = width;   
+            }        
+            else
+            {
+                for( i=0; i < VID_CHANNEL_NUM; i++ )
+                {
+                    dev->use_cif_resolution[i] = cif_enable;
+                    dev->cif_width[i]          = width;     
+                }
+            }         
+
+            medusa_set_resolution( dev, width, selected_channel );        
+            break;
+        case REG_READ:
+                data_from_user->reg_data = cx_read(data_from_user->reg_address);
+            break;
+        case REG_WRITE:
+                cx_write(data_from_user->reg_address, data_from_user->reg_data);
+            break;
+        case MEDUSA_READ:
+                value = cx25821_i2c_read(&dev->i2c_bus[0], (u16)data_from_user->reg_address, &data_from_user->reg_data);
+            break;
+        case MEDUSA_WRITE:
+                cx25821_i2c_write(&dev->i2c_bus[0], (u16)data_from_user->reg_address, data_from_user->reg_data);
+            break;
+    }
+       
+    return 0;
+}
+
+static int vidioc_log_status (struct file *file, void *priv)
+{
+    struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
+    char name[32 + 2];
+
+    snprintf(name, sizeof(name), "%s/2", dev->name);
+    printk(KERN_INFO "%s/2: ============  START LOG STATUS  ============\n",
+	       dev->name);
+    cx25821_call_all(dev, core, log_status);
+    printk(KERN_INFO "%s/2: =============  END LOG STATUS  =============\n",
+	       dev->name);
+    return 0;
+}
+
+static int vidioc_s_ctrl(struct file *file, void *priv,
+				struct v4l2_control *ctl)
+{
+    struct cx25821_fh *fh = priv;
+    struct cx25821_dev *dev  = ((struct cx25821_fh *)priv)->dev;
+    int err;
+    
+    if (fh) 
+    {
+        err = v4l2_prio_check(&dev->prio, &fh->prio);
+        if (0 != err)
+            return err;
+    }
+
+	return 0;
+}
+// exported stuff
+static const struct v4l2_file_operations video_fops = {
+    .owner         = THIS_MODULE,
+    .open          = video_open,
+    .release       = video_release,
+    .read          = video_read,
+    .poll          = video_poll,
+    .mmap          = video_mmap,
+    .ioctl         = video_ioctl_set,
+};
+
+static const struct v4l2_ioctl_ops video_ioctl_ops = {
+    .vidioc_querycap      = vidioc_querycap,
+    .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt_vid_cap,
+    .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_vid_cap,
+    .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_vid_cap,
+    .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_vid_cap,
+    .vidioc_reqbufs       = vidioc_reqbufs,
+    .vidioc_querybuf      = vidioc_querybuf,
+    .vidioc_qbuf          = vidioc_qbuf,
+    .vidioc_dqbuf         = vidioc_dqbuf,
+#ifdef TUNER_FLAG
+    .vidioc_s_std         = vidioc_s_std,
+    .vidioc_querystd      = vidioc_querystd,
+#endif
+    .vidioc_cropcap       = vidioc_cropcap,
+    .vidioc_s_crop        = vidioc_s_crop,
+    .vidioc_g_crop        = vidioc_g_crop,
+    .vidioc_enum_input    = vidioc_enum_input,
+    .vidioc_g_input       = vidioc_g_input,
+    .vidioc_s_input       = vidioc_s_input,
+    .vidioc_g_ctrl        = vidioc_g_ctrl,
+    .vidioc_s_ctrl        = vidioc_s_ctrl,
+    .vidioc_queryctrl	  = vidioc_queryctrl,
+    .vidioc_streamon      = vidioc_streamon,
+    .vidioc_streamoff     = vidioc_streamoff,
+    .vidioc_log_status    = vidioc_log_status,
+    .vidioc_g_priority	  = vidioc_g_priority,
+    .vidioc_s_priority	  = vidioc_s_priority,
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+    .vidiocgmbuf          = vidiocgmbuf,
+#endif
+#ifdef TUNER_FLAG
+    .vidioc_g_tuner       = vidioc_g_tuner,
+    .vidioc_s_tuner       = vidioc_s_tuner,
+    .vidioc_g_frequency   = vidioc_g_frequency,
+    .vidioc_s_frequency   = vidioc_s_frequency,
+#endif
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+    .vidioc_g_register    = vidioc_g_register,
+    .vidioc_s_register    = vidioc_s_register,
+#endif
+};
+
+struct video_device cx25821_videoioctl_template = {
+    .name                 = "cx25821-videoioctl",
+    .fops                 = &video_fops,
+    .minor                = -1,
+    .ioctl_ops            = &video_ioctl_ops,
+    .tvnorms              = CX25821_NORMS,
+    .current_norm         = V4L2_STD_NTSC_M,
+};
+
+
+