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authorMichael Krufky <mkrufky@linuxtv.org>2008-05-10 14:34:09 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-05-14 02:56:46 -0300
commit48723543aff1f46091840222490ded5fe09c0e37 (patch)
treece076b78ecae43f7ae22849277db6d496780cc8b /drivers/media/common/tuners
parent07c87a833e9ef92280ed24ab85cd4eb49cbca9c0 (diff)
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>
Diffstat (limited to 'drivers/media/common/tuners')
-rw-r--r--drivers/media/common/tuners/xc5000.c9
-rw-r--r--drivers/media/common/tuners/xc5000.h22
-rw-r--r--drivers/media/common/tuners/xc5000_priv.h2
3 files changed, 19 insertions, 14 deletions
diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c
index 43d35bdb221..ceae6db901e 100644
--- a/drivers/media/common/tuners/xc5000.c
+++ b/drivers/media/common/tuners/xc5000.c
@@ -212,7 +212,7 @@ static void xc5000_TunerReset(struct dvb_frontend *fe)
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 @@ static const struct dvb_tuner_ops xc5000_tuner_ops = {
.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 @@ struct dvb_frontend * xc5000_attach(struct dvb_frontend *fe,
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 0ee80f9d19b..c910715addc 100644
--- a/drivers/media/common/tuners/xc5000.h
+++ b/drivers/media/common/tuners/xc5000.h
@@ -31,29 +31,31 @@ struct xc5000_config {
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 13b2d19341d..ecebfe4745a 100644
--- a/drivers/media/common/tuners/xc5000_priv.h
+++ b/drivers/media/common/tuners/xc5000_priv.h
@@ -31,6 +31,8 @@ struct xc5000_priv {
u8 video_standard;
u8 rf_mode;
u8 fwloaded;
+
+ void *devptr;
};
#endif