diff options
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-i2c-core.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c index afb53b49b31..72d615a87c3 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c +++ b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c @@ -948,22 +948,32 @@ static struct i2c_adapter pvr2_i2c_adap_template = { .client_unregister = pvr2_i2c_detach_inform, }; -static void do_i2c_scan(struct pvr2_hdw *hdw) + +/* Return true if device exists at given address */ +static int do_i2c_probe(struct pvr2_hdw *hdw, int addr) { struct i2c_msg msg[1]; - int i,rc; + int rc; msg[0].addr = 0; msg[0].flags = I2C_M_RD; msg[0].len = 0; msg[0].buf = NULL; - printk("%s: i2c scan beginning\n",hdw->name); + msg[0].addr = addr; + rc = i2c_transfer(&hdw->i2c_adap, msg, ARRAY_SIZE(msg)); + return rc == 1; +} + +static void do_i2c_scan(struct pvr2_hdw *hdw) +{ + int i; + printk(KERN_INFO "%s: i2c scan beginning\n", hdw->name); for (i = 0; i < 128; i++) { - msg[0].addr = i; - rc = i2c_transfer(&hdw->i2c_adap,msg, ARRAY_SIZE(msg)); - if (rc != 1) continue; - printk("%s: i2c scan: found device @ 0x%x\n",hdw->name,i); + if (do_i2c_probe(hdw, i)) { + printk(KERN_INFO "%s: i2c scan: found device @ 0x%x\n", + hdw->name, i); + } } - printk("%s: i2c scan done.\n",hdw->name); + printk(KERN_INFO "%s: i2c scan done.\n", hdw->name); } void pvr2_i2c_core_init(struct pvr2_hdw *hdw) @@ -1008,6 +1018,16 @@ void pvr2_i2c_core_init(struct pvr2_hdw *hdw) mutex_init(&hdw->i2c_list_lock); hdw->i2c_linked = !0; i2c_add_adapter(&hdw->i2c_adap); + if (hdw->i2c_func[0x18] == i2c_24xxx_ir) { + /* Probe for a different type of IR receiver on this + device. If present, disable the emulated IR receiver. */ + if (do_i2c_probe(hdw, 0x71)) { + pvr2_trace(PVR2_TRACE_INFO, + "Device has newer IR hardware;" + " disabling unneeded virtual IR device"); + hdw->i2c_func[0x18] = NULL; + } + } if (i2c_scan) do_i2c_scan(hdw); } |