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-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-i2c-core.c36
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);
}