diff options
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-i2c-core.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-i2c-core.c | 51 |
1 files changed, 49 insertions, 2 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c index 9af282f9e765..610bd848df24 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c +++ b/drivers/media/video/pvrusb2/pvrusb2-i2c-core.c @@ -42,6 +42,18 @@ static int ir_mode[PVR_NUM] = { [0 ... PVR_NUM-1] = 1 }; module_param_array(ir_mode, int, NULL, 0444); MODULE_PARM_DESC(ir_mode,"specify: 0=disable IR reception, 1=normal IR"); +static int pvr2_disable_ir_video; +module_param_named(disable_autoload_ir_video, pvr2_disable_ir_video, + int, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(disable_autoload_ir_video, + "1=do not try to autoload ir_video IR receiver"); + +/* Mapping of IR schemes to known I2C addresses - if any */ +static const unsigned char ir_video_addresses[] = { + [PVR2_IR_SCHEME_29XXX] = 0x18, + [PVR2_IR_SCHEME_24XXX] = 0x18, +}; + static int pvr2_i2c_write(struct pvr2_hdw *hdw, /* Context */ u8 i2c_addr, /* I2C address we're talking to */ u8 *data, /* Data to write */ @@ -559,6 +571,31 @@ static void do_i2c_scan(struct pvr2_hdw *hdw) printk(KERN_INFO "%s: i2c scan done.\n", hdw->name); } +static void pvr2_i2c_register_ir(struct pvr2_hdw *hdw) +{ + struct i2c_board_info info; + unsigned char addr = 0; + if (pvr2_disable_ir_video) { + pvr2_trace(PVR2_TRACE_INFO, + "Automatic binding of ir_video has been disabled."); + return; + } + if (hdw->ir_scheme_active < ARRAY_SIZE(ir_video_addresses)) { + addr = ir_video_addresses[hdw->ir_scheme_active]; + } + if (!addr) { + /* The device either doesn't support I2C-based IR or we + don't know (yet) how to operate IR on the device. */ + return; + } + pvr2_trace(PVR2_TRACE_INFO, + "Binding ir_video to i2c address 0x%02x.", addr); + memset(&info, 0, sizeof(struct i2c_board_info)); + strlcpy(info.type, "ir_video", I2C_NAME_SIZE); + info.addr = addr; + i2c_new_device(&hdw->i2c_adap, &info); +} + void pvr2_i2c_core_init(struct pvr2_hdw *hdw) { unsigned int idx; @@ -574,7 +611,9 @@ void pvr2_i2c_core_init(struct pvr2_hdw *hdw) printk(KERN_INFO "%s: IR disabled\n",hdw->name); hdw->i2c_func[0x18] = i2c_black_hole; } else if (ir_mode[hdw->unit_number] == 1) { - if (hdw->hdw_desc->ir_scheme == PVR2_IR_SCHEME_24XXX) { + if (hdw->ir_scheme_active == PVR2_IR_SCHEME_24XXX) { + /* Set up translation so that our IR looks like a + 29xxx device */ hdw->i2c_func[0x18] = i2c_24xxx_ir; } } @@ -597,15 +636,23 @@ void pvr2_i2c_core_init(struct pvr2_hdw *hdw) 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. */ + device. This is really the only way to differentiate + older 24xxx devices from 24xxx variants that include an + IR blaster. If the IR blaster is present, the IR + receiver is part of that chip and thus we must 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; + /* Remember that this is a different device... */ + hdw->ir_scheme_active = PVR2_IR_SCHEME_24XXX_MCE; } } if (i2c_scan) do_i2c_scan(hdw); + + pvr2_i2c_register_ir(hdw); } void pvr2_i2c_core_done(struct pvr2_hdw *hdw) |