diff options
Diffstat (limited to 'linux/drivers/media/video/bttv-i2c.c')
| -rw-r--r-- | linux/drivers/media/video/bttv-i2c.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/linux/drivers/media/video/bttv-i2c.c b/linux/drivers/media/video/bttv-i2c.c index 8880d872f..7b1d07ef3 100644 --- a/linux/drivers/media/video/bttv-i2c.c +++ b/linux/drivers/media/video/bttv-i2c.c @@ -1,5 +1,5 @@ /* - $Id: bttv-i2c.c,v 1.9 2004/10/05 12:57:08 kraxel Exp $ + $Id: bttv-i2c.c,v 1.10 2004/10/06 17:30:51 kraxel Exp $ bttv-i2c.c -- all the i2c code is here @@ -46,8 +46,11 @@ static int detach_inform(struct i2c_client *client); static int i2c_debug = 0; static int i2c_hw = 0; +static int i2c_scan = 0; MODULE_PARM(i2c_debug,"i"); MODULE_PARM(i2c_hw,"i"); +MODULE_PARM(i2c_scan,"i"); +MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time"); /* ----------------------------------------------------------------------- */ /* I2C functions - bitbanging adapter (software i2c) */ @@ -427,6 +430,30 @@ void __devinit bttv_readee(struct bttv *btv, unsigned char *eedata, int addr) } } +static char *i2c_devs[128] = { + [ 0x30 >> 1 ] = "IR (hauppauge)", + [ 0x80 >> 1 ] = "msp34xx", + [ 0x86 >> 1 ] = "tda9887", + [ 0xa0 >> 1 ] = "eeprom", + [ 0xc0 >> 1 ] = "tuner (analog)", + [ 0xc2 >> 1 ] = "tuner (analog)", +}; + +static void do_i2c_scan(char *name, struct i2c_client *c) +{ + unsigned char buf; + int i,rc; + + for (i = 0; i < 128; i++) { + c->addr = i; + rc = i2c_master_recv(c,&buf,0); + if (rc < 0) + continue; + printk("%s: i2c scan: found device @ 0x%x [%s]\n", + name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); + } +} + /* init + register i2c algo-bit adapter */ int __devinit init_bttv_i2c(struct bttv *btv) { @@ -473,6 +500,8 @@ int __devinit init_bttv_i2c(struct bttv *btv) bttv_bit_setsda(btv,1); btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap); } + if (0 == btv->i2c_rc && i2c_scan) + do_i2c_scan(btv->c.name,&btv->i2c_client); return btv->i2c_rc; } |