V4L/DVB (7893): xc5000: bug-fix: allow multiple devices in a single system
The current code passes a context pointer in the xc5000_config struct.
This context pointer is used in the tuner_callback function, used to
reset the device after firmware download.
The xc5000_config struct is a static structure, whose .priv member was
being assigned before calling xc5000_attach(). If there are more than
one of the same device type installed on a single system, the last one
to assign xc5000_config.priv will "win", and all others will cease to
function properly.
This patch passes the context pointer in xc5000_attach() rather that
storing it within the static struct xc5000_config.
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c
index 43d35bd..ceae6db 100644
--- a/drivers/media/common/tuners/xc5000.c
+++ b/drivers/media/common/tuners/xc5000.c
@@ -212,7 +212,7 @@
dprintk(1, "%s()\n", __func__);
if (priv->cfg->tuner_callback) {
- ret = priv->cfg->tuner_callback(priv->cfg->priv,
+ ret = priv->cfg->tuner_callback(priv->devptr,
XC5000_TUNER_RESET, 0);
if (ret)
printk(KERN_ERR "xc5000: reset failed\n");
@@ -900,9 +900,9 @@
.get_status = xc5000_get_status
};
-struct dvb_frontend * xc5000_attach(struct dvb_frontend *fe,
- struct i2c_adapter *i2c,
- struct xc5000_config *cfg)
+struct dvb_frontend *xc5000_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c,
+ struct xc5000_config *cfg, void *devptr)
{
struct xc5000_priv *priv = NULL;
u16 id = 0;
@@ -916,6 +916,7 @@
priv->cfg = cfg;
priv->bandwidth = BANDWIDTH_6_MHZ;
priv->i2c = i2c;
+ priv->devptr = devptr;
/* Check if firmware has been loaded. It is possible that another
instance of the driver has loaded the firmware.
diff --git a/drivers/media/common/tuners/xc5000.h b/drivers/media/common/tuners/xc5000.h
index 0ee80f9..c910715 100644
--- a/drivers/media/common/tuners/xc5000.h
+++ b/drivers/media/common/tuners/xc5000.h
@@ -31,29 +31,31 @@
u8 i2c_address;
u32 if_khz;
- /* For each bridge framework, when it attaches either analog or digital,
- * it has to store a reference back to its _core equivalent structure,
- * so that it can service the hardware by steering gpio's etc.
- * Each bridge implementation is different so cast priv accordingly.
- * The xc5000 driver cares not for this value, other than ensuring
- * it's passed back to a bridge during tuner_callback().
- */
- void *priv;
int (*tuner_callback) (void *priv, int command, int arg);
};
/* xc5000 callback command */
#define XC5000_TUNER_RESET 0
+/* For each bridge framework, when it attaches either analog or digital,
+ * it has to store a reference back to its _core equivalent structure,
+ * so that it can service the hardware by steering gpio's etc.
+ * Each bridge implementation is different so cast devptr accordingly.
+ * The xc5000 driver cares not for this value, other than ensuring
+ * it's passed back to a bridge during tuner_callback().
+ */
+
#if defined(CONFIG_MEDIA_TUNER_XC5000) || \
(defined(CONFIG_MEDIA_TUNER_XC5000_MODULE) && defined(MODULE))
extern struct dvb_frontend* xc5000_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c,
- struct xc5000_config *cfg);
+ struct xc5000_config *cfg,
+ void *devptr);
#else
static inline struct dvb_frontend* xc5000_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c,
- struct xc5000_config *cfg)
+ struct xc5000_config *cfg,
+ void *devptr)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return NULL;
diff --git a/drivers/media/common/tuners/xc5000_priv.h b/drivers/media/common/tuners/xc5000_priv.h
index 13b2d19..ecebfe4 100644
--- a/drivers/media/common/tuners/xc5000_priv.h
+++ b/drivers/media/common/tuners/xc5000_priv.h
@@ -31,6 +31,8 @@
u8 video_standard;
u8 rf_mode;
u8 fwloaded;
+
+ void *devptr;
};
#endif
diff --git a/drivers/media/video/au0828/au0828-dvb.c b/drivers/media/video/au0828/au0828-dvb.c
index 1371b4e..c86a5f17 100644
--- a/drivers/media/video/au0828/au0828-dvb.c
+++ b/drivers/media/video/au0828/au0828-dvb.c
@@ -337,12 +337,10 @@
dvb->frontend = dvb_attach(au8522_attach,
&hauppauge_hvr950q_config,
&dev->i2c_adap);
- if (dvb->frontend != NULL) {
- hauppauge_hvr950q_tunerconfig.priv = dev;
+ if (dvb->frontend != NULL)
dvb_attach(xc5000_attach, dvb->frontend,
&dev->i2c_adap,
- &hauppauge_hvr950q_tunerconfig);
- }
+ &hauppauge_hvr950q_tunerconfig, dev);
break;
default:
printk(KERN_WARNING "The frontend of your DVB/ATSC card "
diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index 47e3f9e..022aa39 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -384,12 +384,10 @@
port->dvb.frontend = dvb_attach(s5h1409_attach,
&hauppauge_hvr1500q_config,
&dev->i2c_bus[0].i2c_adap);
- if (port->dvb.frontend != NULL) {
- hauppauge_hvr1500q_tunerconfig.priv = i2c_bus;
+ if (port->dvb.frontend != NULL)
dvb_attach(xc5000_attach, port->dvb.frontend,
&i2c_bus->i2c_adap,
- &hauppauge_hvr1500q_tunerconfig);
- }
+ &hauppauge_hvr1500q_tunerconfig, i2c_bus);
break;
case CX23885_BOARD_HAUPPAUGE_HVR1500:
i2c_bus = &dev->i2c_bus[1];
diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index 75e2e58..d96173f 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -816,11 +816,10 @@
/* tuner_config.video_dev must point to
* i2c_adap.algo_data
*/
- pinnacle_pctv_hd_800i_tuner_config.priv =
- core->i2c_adap.algo_data;
if (!dvb_attach(xc5000_attach, dev->dvb.frontend,
&core->i2c_adap,
- &pinnacle_pctv_hd_800i_tuner_config))
+ &pinnacle_pctv_hd_800i_tuner_config,
+ core->i2c_adap.algo_data))
goto frontend_detach;
}
break;
@@ -878,11 +877,10 @@
/* tuner_config.video_dev must point to
* i2c_adap.algo_data
*/
- dvico_fusionhdtv7_tuner_config.priv =
- core->i2c_adap.algo_data;
if (!dvb_attach(xc5000_attach, dev->dvb.frontend,
&core->i2c_adap,
- &dvico_fusionhdtv7_tuner_config))
+ &dvico_fusionhdtv7_tuner_config,
+ core->i2c_adap.algo_data))
goto frontend_detach;
}
break;
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index 4ca686f..5a75788 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -448,10 +448,10 @@
xc5000_cfg.i2c_address = t->i2c->addr;
xc5000_cfg.if_khz = 5380;
- xc5000_cfg.priv = c->adapter->algo_data;
xc5000_cfg.tuner_callback = t->tuner_callback;
if (!dvb_attach(xc5000_attach,
- &t->fe, t->i2c->adapter, &xc5000_cfg))
+ &t->fe, t->i2c->adapter, &xc5000_cfg,
+ c->adapter->algo_data))
goto attach_failed;
xc_tuner_ops = &t->fe.ops.tuner_ops;