staging: comedi: comedi_test: implement INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS (e0b2ca89) · Commits · 戴 / test

drivers/staging/comedi/drivers/comedi_test.c

+44 −0

Original line number	Diff line number	Diff line
		@@ -626,6 +626,48 @@ static int waveform_ao_insn_write(struct comedi_device *dev,
		return insn->n;
		}

		static int waveform_ai_insn_config(struct comedi_device *dev,
		struct comedi_subdevice *s,
		struct comedi_insn *insn,
		unsigned int *data)
		{
		if (data[0] == INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS) {
		/*
		* input: data[1], data[2] : scan_begin_src, convert_src
		* output: data[1], data[2] : scan_begin_min, convert_min
		*/
		if (data[1] == TRIG_FOLLOW) {
		/* exactly TRIG_FOLLOW case */
		data[1] = 0;
		data[2] = NSEC_PER_USEC;
		} else {
		data[1] = NSEC_PER_USEC;
		if (data[2] & TRIG_TIMER)
		data[2] = NSEC_PER_USEC;
		else
		data[2] = 0;
		}
		return 0;
		}

		return -EINVAL;
		}

		static int waveform_ao_insn_config(struct comedi_device *dev,
		struct comedi_subdevice *s,
		struct comedi_insn *insn,
		unsigned int *data)
		{
		if (data[0] == INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS) {
		/* we don't care about actual channels */
		data[1] = NSEC_PER_USEC; /* scan_begin_min */
		data[2] = 0; /* convert_min */
		return 0;
		}

		return -EINVAL;
		}

		static int waveform_common_attach(struct comedi_device *dev,
		int amplitude, int period)
		{
		@@ -658,6 +700,7 @@ static int waveform_common_attach(struct comedi_device *dev,
		s->do_cmd = waveform_ai_cmd;
		s->do_cmdtest = waveform_ai_cmdtest;
		s->cancel = waveform_ai_cancel;
		s->insn_config = waveform_ai_insn_config;

		s = &dev->subdevices[1];
		dev->write_subdev = s;
		@@ -673,6 +716,7 @@ static int waveform_common_attach(struct comedi_device *dev,
		s->do_cmd = waveform_ao_cmd;
		s->do_cmdtest = waveform_ao_cmdtest;
		s->cancel = waveform_ao_cancel;
		s->insn_config = waveform_ao_insn_config;

		/* Our default loopback value is just a 0V flatline */
		for (i = 0; i < s->n_chan; i++)

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