From 0cc118671282044b2a87621e16d7722d5e60cd08 Mon Sep 17 00:00:00 2001 From: Mike Isely Date: Sun, 31 Aug 2008 21:06:11 -0300 Subject: [PATCH] V4L/DVB (8901): pvrusb2: Disable virtual IR device when not needed. Disable "virtual" IR receiver on for 24xxx devices that have an internal IR blaster. In that case there's another another IR receiver present and to leave the virtual receiver available just causes confusion. This means that 24xxx users will no longer see a phantom IR chip. Signed-off-by: Mike Isely Signed-off-by: Mauro Carvalho Chehab --- .../media/video/pvrusb2/pvrusb2-i2c-core.c | 36 ++++++++++++++----- 1 file 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); } -- 2.41.1