diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/tuner-xc2028.c | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/drivers/media/video/tuner-xc2028.c b/drivers/media/video/tuner-xc2028.c index 78e83700a13..0e68002a4a0 100644 --- a/drivers/media/video/tuner-xc2028.c +++ b/drivers/media/video/tuner-xc2028.c @@ -12,6 +12,7 @@ #include <linux/videodev.h> #include <linux/delay.h> #include <media/tuner.h> +#include <linux/mutex.h> #include "tuner-driver.h" #include "tuner-xc2028.h" @@ -47,6 +48,8 @@ struct xc2028_data { were loaded? */ enum tuner_mode mode; struct i2c_client *i2c_client; + + struct mutex lock; }; #define i2c_send(rc,c,buf,size) \ @@ -286,20 +289,28 @@ static int check_firmware(struct i2c_client *c, enum tuner_mode new_mode, static int xc2028_signal(struct i2c_client *c) { - int lock, signal; + struct tuner *t = i2c_get_clientdata(c); + struct xc2028_data *xc2028 = t->priv; + int frq_lock, signal=0; + + mutex_lock(&xc2028->lock); printk(KERN_INFO "xc2028: %s called\n", __FUNCTION__); - lock = xc2028_get_reg(c, 0x2); - if (lock<=0) - return lock; + frq_lock = xc2028_get_reg(c, 0x2); + if (frq_lock<=0) + goto ret; /* Frequency is locked. Return signal quality */ signal = xc2028_get_reg(c, 0x40); - if(signal<=0) - return lock; + if(signal<=0) { + signal=frq_lock; + } + +ret: + mutex_unlock(&xc2028->lock); return signal; } @@ -318,6 +329,8 @@ static void generic_set_tv_freq(struct i2c_client *c, u32 freq /* in Hz */, when freq is changed */ struct xc2028_data *xc2028 = t->priv; + mutex_lock(&xc2028->lock); + xc2028->firm_type=0; /* Reset GPIO 1 */ @@ -325,13 +338,13 @@ static void generic_set_tv_freq(struct i2c_client *c, u32 freq /* in Hz */, rc = t->tuner_callback( c->adapter->algo_data, XC2028_TUNER_RESET, 0); if (rc<0) - return; + goto ret; } msleep(10); printk("xc3028: should set frequency %d kHz)\n", freq / 1000); if (check_firmware(c, new_mode, bandwidth)<0) - return; + goto ret; if(new_mode == T_DIGITAL_TV) offset = 2750000; @@ -344,7 +357,7 @@ static void generic_set_tv_freq(struct i2c_client *c, u32 freq /* in Hz */, rc = t->tuner_callback( c->adapter->algo_data, XC2028_RESET_CLK, 1); if (rc<0) - return; + goto ret; } msleep(10); @@ -357,12 +370,15 @@ static void generic_set_tv_freq(struct i2c_client *c, u32 freq /* in Hz */, i2c_send(rc, c, buf, sizeof(buf)); if (rc<0) - return; + goto ret; msleep(100); printk("divider= %02x %02x %02x %02x (freq=%d.%02d)\n", buf[1],buf[2],buf[3],buf[4], freq / 16, freq % 16 * 100 / 16); + +ret: + mutex_unlock(&xc2028->lock); } @@ -416,6 +432,8 @@ int xc2028_tuner_init(struct i2c_client *c) xc2028->need_load_generic=1; xc2028->mode = T_UNINITIALIZED; + mutex_init(&xc2028->lock); + /* FIXME: Check where t->priv will be freed */ if (version<0) @@ -498,5 +516,7 @@ int xc2028_attach(struct i2c_client *c, struct dvb_frontend *fe) return 0; } + + EXPORT_SYMBOL(xc2028_attach); |