V4L/DVB (7944): tuner-xc2028: use hybrid_tuner_request_state
Use a standard method to manage multiple instances of a hybrid tuner.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c
index 9e9003c..0cbde17 100644
--- a/drivers/media/common/tuners/tuner-xc2028.c
+++ b/drivers/media/common/tuners/tuner-xc2028.c
@@ -46,7 +46,7 @@
MODULE_PARM_DESC(firmware_name, "Firmware file name. Allows overriding the "
"default firmware name\n");
-static LIST_HEAD(xc2028_list);
+static LIST_HEAD(hybrid_tuner_instance_list);
static DEFINE_MUTEX(xc2028_list_mutex);
/* struct for storing firmware table */
@@ -68,12 +68,11 @@
};
struct xc2028_data {
- struct list_head xc2028_list;
+ struct list_head hybrid_tuner_instance_list;
struct tuner_i2c_props i2c_props;
int (*tuner_callback) (void *dev,
int command, int arg);
void *video_dev;
- int count;
__u32 frequency;
struct firmware_description *firm;
@@ -1072,20 +1071,19 @@
mutex_lock(&xc2028_list_mutex);
- priv->count--;
-
- if (!priv->count) {
- list_del(&priv->xc2028_list);
-
+ /* only perform final cleanup if this is the last instance */
+ if (hybrid_tuner_report_instance_count(priv) == 1) {
kfree(priv->ctrl.fname);
-
free_firmware(priv);
- kfree(priv);
- fe->tuner_priv = NULL;
}
+ if (priv)
+ hybrid_tuner_release_state(priv);
+
mutex_unlock(&xc2028_list_mutex);
+ fe->tuner_priv = NULL;
+
return 0;
}
@@ -1150,7 +1148,7 @@
struct xc2028_config *cfg)
{
struct xc2028_data *priv;
- void *video_dev;
+ int instance;
if (debug)
printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
@@ -1163,49 +1161,41 @@
return NULL;
}
- video_dev = cfg->i2c_adap->algo_data;
-
- if (debug)
- printk(KERN_DEBUG "xc2028: video_dev =%p\n", video_dev);
-
mutex_lock(&xc2028_list_mutex);
- list_for_each_entry(priv, &xc2028_list, xc2028_list) {
- if (&priv->i2c_props.adap->dev == &cfg->i2c_adap->dev) {
- video_dev = NULL;
- if (debug)
- printk(KERN_DEBUG "xc2028: reusing device\n");
-
- break;
- }
- }
-
- if (video_dev) {
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (priv == NULL) {
- mutex_unlock(&xc2028_list_mutex);
- return NULL;
- }
-
- priv->i2c_props.addr = cfg->i2c_addr;
- priv->i2c_props.adap = cfg->i2c_adap;
- priv->i2c_props.name = "xc2028";
-
- priv->video_dev = video_dev;
+ instance = hybrid_tuner_request_state(struct xc2028_data, priv,
+ hybrid_tuner_instance_list,
+ cfg->i2c_adap, cfg->i2c_addr,
+ "xc2028");
+ switch (instance) {
+ case 0:
+ /* memory allocation failure */
+ goto fail;
+ break;
+ case 1:
+ /* new tuner instance */
priv->tuner_callback = cfg->callback;
priv->ctrl.max_len = 13;
mutex_init(&priv->lock);
- list_add_tail(&priv->xc2028_list, &xc2028_list);
+ /* analog side (tuner-core) uses i2c_adap->algo_data.
+ * digital side is not guaranteed to have algo_data defined.
+ *
+ * digital side will always have fe->dvb defined.
+ * analog side (tuner-core) doesn't (yet) define fe->dvb.
+ */
+ priv->video_dev = ((fe->dvb) && (fe->dvb->priv)) ?
+ fe->dvb->priv : cfg->i2c_adap->algo_data;
+
+ fe->tuner_priv = priv;
+ break;
+ case 2:
+ /* existing tuner instance */
+ fe->tuner_priv = priv;
+ break;
}
- fe->tuner_priv = priv;
- priv->count++;
-
- if (debug)
- printk(KERN_DEBUG "xc2028: usage count is %i\n", priv->count);
-
memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
sizeof(xc2028_dvb_tuner_ops));
@@ -1217,6 +1207,11 @@
mutex_unlock(&xc2028_list_mutex);
return fe;
+fail:
+ mutex_unlock(&xc2028_list_mutex);
+
+ xc2028_dvb_release(fe);
+ return NULL;
}
EXPORT_SYMBOL(xc2028_attach);