diff options
| author | Mike Isely <isely@pobox.com> | 2009-01-14 04:22:56 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:42:21 -0300 |
| commit | 13a887971b6c97751fce62ab803ee93a42a23c5d (patch) | |
| tree | 53923a8e8a2fba36c519788fbade0322bfbe2b3d /drivers/media/video/pvrusb2/pvrusb2-hdw.c | |
| parent | d166b02ea6b03766f6fd867fb1fef378a57683e5 (diff) | |
V4L/DVB (10237): pvrusb2: Generate a device-unique identifier
Implement a new internal function to create a string device
identifier. This ID stays with the specific device, making it useful
to user space to identify specific devices. We use the serial number
if available; otherwise we give up and just spit out a unit/instance ID.
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-hdw.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-hdw.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c index fa304e5f252..ac5dad0c5fb 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c +++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c @@ -1283,6 +1283,12 @@ const char *pvr2_hdw_get_bus_info(struct pvr2_hdw *hdw) } +const char *pvr2_hdw_get_device_identifier(struct pvr2_hdw *hdw) +{ + return hdw->identifier; +} + + unsigned long pvr2_hdw_get_cur_freq(struct pvr2_hdw *hdw) { return hdw->freqSelector ? hdw->freqValTelevision : hdw->freqValRadio; @@ -2024,6 +2030,19 @@ static void pvr2_hdw_setup_low(struct pvr2_hdw *hdw) hdw->std_mask_eeprom = V4L2_STD_ALL; } + if (hdw->serial_number) { + idx = scnprintf(hdw->identifier, sizeof(hdw->identifier) - 1, + "sn-%lu", hdw->serial_number); + } else if (hdw->unit_number >= 0) { + idx = scnprintf(hdw->identifier, sizeof(hdw->identifier) - 1, + "unit-%c", + hdw->unit_number + 'a'); + } else { + idx = scnprintf(hdw->identifier, sizeof(hdw->identifier) - 1, + "unit-??"); + } + hdw->identifier[idx] = 0; + pvr2_hdw_setup_std(hdw); if (!get_default_tuner_type(hdw)) { |