staging: comedi: daqboard2000: support 4 AO channels
The driver supports DaqBoard/2000 and DaqBoard/2001. DaqBoard/2000 has 2 AO channels, but DaqBoard/2001 has 4 AO channels. The driver currently only supports 2 AO channels, but supporting 4 channels is just a case of setting the `n_chan` member of the COMEDI subdevice to 4 instead of 2. Add a new boolean flag member `has_2_ao` to `struct db2k_boardtype` to be set to `true` if the board only has 2 AO channels. Set this to `true` in the element of `db2k_boardtypes[]` that corresponds to the DaqBoard/2000. Use it in `db2k_auto_attach()` to initialize the number of AO channels to 2 or 4, as appropriate. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -114,7 +114,7 @@
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#define DB2K_FIRMWARE "daqboard2000_firmware.bin"
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#define DB2K_SUBSYSTEM_IDS2 0x0002 /* Daqboard/2000 - 2 Dacs */
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#define DB2K_SUBSYSTEM_IDS4 0x0004 /* Daqboard/2000 - 4 Dacs */
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#define DB2K_SUBSYSTEM_IDS4 0x0004 /* Daqboard/2001 - 4 Dacs */
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static const struct comedi_lrange db2k_ai_range = {
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13, {
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@ -248,12 +248,14 @@ static const struct comedi_lrange db2k_ai_range = {
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struct db2k_boardtype {
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const char *name;
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int id;
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bool has_2_ao:1; /* false: 4 AO chans; true: 2 AO chans */
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};
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static const struct db2k_boardtype db2k_boardtypes[] = {
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{
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.name = "ids2",
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.id = DB2K_SUBSYSTEM_IDS2,
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.has_2_ao = true,
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},
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{
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.name = "ids4",
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@ -758,7 +760,7 @@ static int db2k_auto_attach(struct comedi_device *dev,
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/* ao subdevice */
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s->type = COMEDI_SUBD_AO;
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s->subdev_flags = SDF_WRITABLE;
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s->n_chan = 2;
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s->n_chan = board->has_2_ao ? 2 : 4;
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s->maxdata = 0xffff;
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s->insn_write = db2k_ao_insn_write;
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s->range_table = &range_bipolar10;
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