V4L/DVB (11115): cafe_ccic: use v4l2_subdev to talk to the ov7670 sensor.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c
index 600dde3..3363e50 100644 (file)
--- a/drivers/media/video/cafe_ccic.c
+++ b/drivers/media/video/cafe_ccic.c
@@ -148,7 +148,8 @@ struct cafe_camera
        struct pci_dev *pdev;
        struct video_device vdev;
        struct i2c_adapter i2c_adapter;
-       struct i2c_client *sensor;
+       struct v4l2_subdev *sensor;
+       unsigned short sensor_addr;
 
        unsigned char __iomem *regs;
        struct list_head dev_list;      /* link to other devices */
@@ -196,6 +197,8 @@ struct cafe_camera
 #define CF_DMA_ACTIVE   3      /* A frame is incoming */
 #define CF_CONFIG_NEEDED 4     /* Must configure hardware */
 
+#define sensor_call(cam, o, f, args...) \
+       v4l2_subdev_call(cam->sensor, o, f, ##args)
 
 static inline struct cafe_camera *to_cam(struct v4l2_device *dev)
 {
@@ -439,14 +442,6 @@ static int cafe_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
        struct cafe_camera *cam = to_cam(v4l2_dev);
        int ret = -EINVAL;
 
-       /*
-        * Refuse to talk to anything but OV cam chips.  We should
-        * never even see an attempt to do so, but one never knows.
-        */
-       if (cam->sensor && addr != cam->sensor->addr) {
-               cam_err(cam, "funky smbus addr %d\n", addr);
-               return -EINVAL;
-       }
        /*
         * This interface would appear to only do byte data ops.  OK
         * it can do word too, but the cam chip has no use for that.
@@ -485,40 +480,9 @@ static struct i2c_algorithm cafe_smbus_algo = {
 };
 
 /* Somebody is on the bus */
-static int cafe_cam_init(struct cafe_camera *cam);
 static void cafe_ctlr_stop_dma(struct cafe_camera *cam);
 static void cafe_ctlr_power_down(struct cafe_camera *cam);
 
-static int cafe_smbus_attach(struct i2c_client *client)
-{
-       struct v4l2_device *v4l2_dev = i2c_get_adapdata(client->adapter);
-       struct cafe_camera *cam = to_cam(v4l2_dev);
-
-       /*
-        * Don't talk to chips we don't recognize.
-        */
-       if (client->driver->id == I2C_DRIVERID_OV7670) {
-               cam->sensor = client;
-               return cafe_cam_init(cam);
-       }
-       return -EINVAL;
-}
-
-static int cafe_smbus_detach(struct i2c_client *client)
-{
-       struct v4l2_device *v4l2_dev = i2c_get_adapdata(client->adapter);
-       struct cafe_camera *cam = to_cam(v4l2_dev);
-
-       if (cam->sensor == client) {
-               cafe_ctlr_stop_dma(cam);
-               cafe_ctlr_power_down(cam);
-               cam_err(cam, "lost the sensor!\n");
-               cam->sensor = NULL;  /* Bummer, no camera */
-               cam->state = S_NOTREADY;
-       }
-       return 0;
-}
-
 static int cafe_smbus_setup(struct cafe_camera *cam)
 {
        struct i2c_adapter *adap = &cam->i2c_adapter;
@@ -527,8 +491,6 @@ static int cafe_smbus_setup(struct cafe_camera *cam)
        cafe_smbus_enable_irq(cam);
        adap->id = I2C_HW_SMBUS_CAFE;
        adap->owner = THIS_MODULE;
-       adap->client_register = cafe_smbus_attach;
-       adap->client_unregister = cafe_smbus_detach;
        adap->algo = &cafe_smbus_algo;
        strcpy(adap->name, "cafe_ccic");
        adap->dev.parent = &cam->pdev->dev;
@@ -790,23 +752,9 @@ static void cafe_ctlr_power_down(struct cafe_camera *cam)
  * Communications with the sensor.
  */
 
-static int __cafe_cam_cmd(struct cafe_camera *cam, int cmd, void *arg)
-{
-       struct i2c_client *sc = cam->sensor;
-       int ret;
-
-       if (sc == NULL || sc->driver == NULL || sc->driver->command == NULL)
-               return -EINVAL;
-       ret = sc->driver->command(sc, cmd, arg);
-       if (ret == -EPERM) /* Unsupported command */
-               return 0;
-       return ret;
-}
-
 static int __cafe_cam_reset(struct cafe_camera *cam)
 {
-       int zero = 0;
-       return __cafe_cam_cmd(cam, VIDIOC_INT_RESET, &zero);
+       return sensor_call(cam, core, reset, 0);
 }
 
 /*
@@ -826,14 +774,13 @@ static int cafe_cam_init(struct cafe_camera *cam)
        if (ret)
                goto out;
        chip.match.type = V4L2_CHIP_MATCH_I2C_ADDR;
-       chip.match.addr = cam->sensor->addr;
-       ret = __cafe_cam_cmd(cam, VIDIOC_DBG_G_CHIP_IDENT, &chip);
+       chip.match.addr = cam->sensor_addr;
+       ret = sensor_call(cam, core, g_chip_ident, &chip);
        if (ret)
                goto out;
        cam->sensor_type = chip.ident;
-/*     if (cam->sensor->addr != OV7xx0_SID) { */
        if (cam->sensor_type != V4L2_IDENT_OV7670) {
-               cam_err(cam, "Unsupported sensor type %d", cam->sensor->addr);
+               cam_err(cam, "Unsupported sensor type 0x%x", cam->sensor_type);
                ret = -EINVAL;
                goto out;
        }
@@ -857,21 +804,21 @@ static int cafe_cam_set_flip(struct cafe_camera *cam)
        memset(&ctrl, 0, sizeof(ctrl));
        ctrl.id = V4L2_CID_VFLIP;
        ctrl.value = flip;
-       return __cafe_cam_cmd(cam, VIDIOC_S_CTRL, &ctrl);
+       return sensor_call(cam, core, s_ctrl, &ctrl);
 }
 
 
 static int cafe_cam_configure(struct cafe_camera *cam)
 {
        struct v4l2_format fmt;
-       int ret, zero = 0;
+       int ret;
 
        if (cam->state != S_IDLE)
                return -EINVAL;
        fmt.fmt.pix = cam->pix_format;
-       ret = __cafe_cam_cmd(cam, VIDIOC_INT_INIT, &zero);
+       ret = sensor_call(cam, core, init, 0);
        if (ret == 0)
-               ret = __cafe_cam_cmd(cam, VIDIOC_S_FMT, &fmt);
+               ret = sensor_call(cam, video, s_fmt, &fmt);
        /*
         * OV7670 does weird things if flip is set *before* format...
         */
@@ -1490,7 +1437,7 @@ static int cafe_vidioc_queryctrl(struct file *filp, void *priv,
        int ret;
 
        mutex_lock(&cam->s_mutex);
-       ret = __cafe_cam_cmd(cam, VIDIOC_QUERYCTRL, qc);
+       ret = sensor_call(cam, core, queryctrl, qc);
        mutex_unlock(&cam->s_mutex);
        return ret;
 }
@@ -1503,7 +1450,7 @@ static int cafe_vidioc_g_ctrl(struct file *filp, void *priv,
        int ret;
 
        mutex_lock(&cam->s_mutex);
-       ret = __cafe_cam_cmd(cam, VIDIOC_G_CTRL, ctrl);
+       ret = sensor_call(cam, core, g_ctrl, ctrl);
        mutex_unlock(&cam->s_mutex);
        return ret;
 }
@@ -1516,7 +1463,7 @@ static int cafe_vidioc_s_ctrl(struct file *filp, void *priv,
        int ret;
 
        mutex_lock(&cam->s_mutex);
-       ret = __cafe_cam_cmd(cam, VIDIOC_S_CTRL, ctrl);
+       ret = sensor_call(cam, core, s_ctrl, ctrl);
        mutex_unlock(&cam->s_mutex);
        return ret;
 }
@@ -1558,7 +1505,7 @@ static int cafe_vidioc_enum_fmt_vid_cap(struct file *filp,
        if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;
        mutex_lock(&cam->s_mutex);
-       ret = __cafe_cam_cmd(cam, VIDIOC_ENUM_FMT, fmt);
+       ret = sensor_call(cam, video, enum_fmt, fmt);
        mutex_unlock(&cam->s_mutex);
        return ret;
 }
@@ -1571,7 +1518,7 @@ static int cafe_vidioc_try_fmt_vid_cap(struct file *filp, void *priv,
        int ret;
 
        mutex_lock(&cam->s_mutex);
-       ret = __cafe_cam_cmd(cam, VIDIOC_TRY_FMT, fmt);
+       ret = sensor_call(cam, video, try_fmt, fmt);
        mutex_unlock(&cam->s_mutex);
        return ret;
 }
@@ -1680,7 +1627,7 @@ static int cafe_vidioc_g_parm(struct file *filp, void *priv,
        int ret;
 
        mutex_lock(&cam->s_mutex);
-       ret = __cafe_cam_cmd(cam, VIDIOC_G_PARM, parms);
+       ret = sensor_call(cam, video, g_parm, parms);
        mutex_unlock(&cam->s_mutex);
        parms->parm.capture.readbuffers = n_dma_bufs;
        return ret;
@@ -1693,7 +1640,7 @@ static int cafe_vidioc_s_parm(struct file *filp, void *priv,
        int ret;
 
        mutex_lock(&cam->s_mutex);
-       ret = __cafe_cam_cmd(cam, VIDIOC_S_PARM, parms);
+       ret = sensor_call(cam, video, s_parm, parms);
        mutex_unlock(&cam->s_mutex);
        parms->parm.capture.readbuffers = n_dma_bufs;
        return ret;
@@ -1973,7 +1920,7 @@ static ssize_t cafe_dfs_read_cam(struct file *file,
        {
                u8 v;
 
-               cafe_smbus_read_data(cam, cam->sensor->addr, offset, &v);
+               cafe_smbus_read_data(cam, cam->sensor_addr, offset, &v);
                s += sprintf(s, "%02x: %02x\n", offset, v);
        }
        return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf,
@@ -2089,6 +2036,18 @@ static int cafe_pci_probe(struct pci_dev *pdev,
        ret = cafe_smbus_setup(cam);
        if (ret)
                goto out_freeirq;
+
+       cam->sensor_addr = 0x42;
+       cam->sensor = v4l2_i2c_new_subdev(&cam->i2c_adapter,
+                       "ov7670", "ov7670", cam->sensor_addr);
+       if (cam->sensor == NULL) {
+               ret = -ENODEV;
+               goto out_smbus;
+       }
+       ret = cafe_cam_init(cam);
+       if (ret)
+               goto out_smbus;
+
        /*
         * Get the v4l2 setup done.
         */
@@ -2263,7 +2222,6 @@ static int __init cafe_init(void)
                printk(KERN_ERR "Unable to register cafe_ccic driver\n");
                goto out;
        }
-       request_module("ov7670");  /* FIXME want something more general */
        ret = 0;
 
   out: