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staging: comedi: ni_mio_common: implement output selection of GPFO_{0, 1}

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Implement the ability to route various signals to NI_CtrOut(x) pin.  This
pin is also known as GPFO_{0,1} in the DAQ STC.

Signed-off-by: Spencer E. Olson <olsonse@umich.edu>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Spencer E. Olson 2018-10-03 14:56:07 -06:00 committed by Greg Kroah-Hartman
parent d4961bb3d9
commit 02d1c6e827
2 changed files with 111 additions and 1 deletions
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106
drivers/staging/comedi/drivers/ni_mio_common.c
View File

@ -5532,6 +5532,77 @@ static void ni_rtsi_init(struct comedi_device *dev)
set_rgout0_reg(0, dev);
}
/* Get route of GPFO_i/CtrOut pins */
static inline int ni_get_gout_routing(unsigned int dest,
struct comedi_device *dev)
{
struct ni_private *devpriv = dev->private;
unsigned int reg = devpriv->an_trig_etc_reg;
switch (dest) {
case 0:
if (reg & NISTC_ATRIG_ETC_GPFO_0_ENA)
return NISTC_ATRIG_ETC_GPFO_0_SEL_TO_SRC(reg);
break;
case 1:
if (reg & NISTC_ATRIG_ETC_GPFO_1_ENA)
return NISTC_ATRIG_ETC_GPFO_1_SEL_TO_SRC(reg);
break;
}
return -EINVAL;
}
/* Set route of GPFO_i/CtrOut pins */
static inline int ni_disable_gout_routing(unsigned int dest,
struct comedi_device *dev)
{
struct ni_private *devpriv = dev->private;
switch (dest) {
case 0:
devpriv->an_trig_etc_reg &= ~NISTC_ATRIG_ETC_GPFO_0_ENA;
break;
case 1:
devpriv->an_trig_etc_reg &= ~NISTC_ATRIG_ETC_GPFO_1_ENA;
break;
default:
return -EINVAL;
}
ni_stc_writew(dev, devpriv->an_trig_etc_reg, NISTC_ATRIG_ETC_REG);
return 0;
}
/* Set route of GPFO_i/CtrOut pins */
static inline int ni_set_gout_routing(unsigned int src, unsigned int dest,
struct comedi_device *dev)
{
struct ni_private *devpriv = dev->private;
switch (dest) {
case 0:
/* clear reg */
devpriv->an_trig_etc_reg &= ~NISTC_ATRIG_ETC_GPFO_0_SEL(-1);
/* set reg */
devpriv->an_trig_etc_reg |= NISTC_ATRIG_ETC_GPFO_0_ENA
| NISTC_ATRIG_ETC_GPFO_0_SEL(src);
break;
case 1:
/* clear reg */
devpriv->an_trig_etc_reg &= ~NISTC_ATRIG_ETC_GPFO_1_SEL;
src = src ? NISTC_ATRIG_ETC_GPFO_1_SEL : 0;
/* set reg */
devpriv->an_trig_etc_reg |= NISTC_ATRIG_ETC_GPFO_1_ENA | src;
break;
default:
return -EINVAL;
}
ni_stc_writew(dev, devpriv->an_trig_etc_reg, NISTC_ATRIG_ETC_REG);
return 0;
}
/*
* Retrieves the current source of the output selector for the given
* destination. If the terminal for the destination is not already configured
@ -5563,6 +5634,16 @@ static int get_output_select_source(int dest, struct comedi_device *dev)
reg = get_ith_rtsi_brd_reg(i, dev);
}
}
} else if (dest >= NI_CtrOut(0) && dest <= NI_CtrOut(-1)) {
/*
* not handled by ni_tio. Only available for GPFO registers in
* e/m series.
*/
dest -= NI_CtrOut(0);
if (dest > 1)
/* there are only two g_out outputs. */
return -EINVAL;
reg = ni_get_gout_routing(dest, dev);
} else {
dev_dbg(dev->class_dev, "%s: unhandled destination (%d) queried\n",
__func__, dest);
@ -5640,6 +5721,17 @@ static int connect_route(unsigned int src, unsigned int dest,
ni_set_rtsi_direction(dev, dest, COMEDI_OUTPUT);
ni_set_rtsi_routing(dev, dest, reg);
} else if (dest >= NI_CtrOut(0) && dest <= NI_CtrOut(-1)) {
/*
* not handled by ni_tio. Only available for GPFO registers in
* e/m series.
*/
dest -= NI_CtrOut(0);
if (dest > 1)
/* there are only two g_out outputs. */
return -EINVAL;
if (ni_set_gout_routing(src, dest, dev))
return -EINVAL;
} else {
return -EINVAL;
}
@ -5688,6 +5780,16 @@ static int disconnect_route(unsigned int src, unsigned int dest,
reg = default_rtsi_routing[dest - TRIGGER_LINE(0)];
ni_set_rtsi_direction(dev, dest, COMEDI_INPUT);
ni_set_rtsi_routing(dev, dest, reg);
} else if (dest >= NI_CtrOut(0) && dest <= NI_CtrOut(-1)) {
/*
* not handled by ni_tio. Only available for GPFO registers in
* e/m series.
*/
dest -= NI_CtrOut(0);
if (dest > 1)
/* there are only two g_out outputs. */
return -EINVAL;
reg = ni_disable_gout_routing(dest, dev);
} else {
return -EINVAL;
}
@ -6147,6 +6249,10 @@ static int ni_E_init(struct comedi_device *dev,
s->private = gpct;
}
/* Initialize GPFO_{0,1} to produce output of counters */
ni_set_gout_routing(0, 0, dev); /* output of counter 0; DAQ STC, p338 */
ni_set_gout_routing(0, 1, dev); /* output of counter 1; DAQ STC, p338 */
/* Frequency output subdevice */
s = &dev->subdevices[NI_FREQ_OUT_SUBDEV];
s->type = COMEDI_SUBD_COUNTER;

6
drivers/staging/comedi/drivers/ni_stc.h
View File

@ -284,11 +284,15 @@
#define NISTC_ATRIG_ETC_REG 61
#define NISTC_ATRIG_ETC_GPFO_1_ENA BIT(15)
#define NISTC_ATRIG_ETC_GPFO_0_ENA BIT(14)
#define NISTC_ATRIG_ETC_GPFO_0_SEL(x) (((x) & 0x3) << 11)
#define NISTC_ATRIG_ETC_GPFO_0_SEL(x) (((x) & 0x7) << 11)
#define NISTC_ATRIG_ETC_GPFO_0_SEL_TO_SRC(x) (((x) >> 11) & 0x7)
#define NISTC_ATRIG_ETC_GPFO_1_SEL BIT(7)
#define NISTC_ATRIG_ETC_GPFO_1_SEL_TO_SRC(x) (((x) >> 7) & 0x1)
#define NISTC_ATRIG_ETC_DRV BIT(4)
#define NISTC_ATRIG_ETC_ENA BIT(3)
#define NISTC_ATRIG_ETC_MODE(x) (((x) & 0x7) << 0)
#define NISTC_GPFO_0_G_OUT 0 /* input to GPFO_0_SEL for Ctr0Out */
#define NISTC_GPFO_1_G_OUT 0 /* input to GPFO_1_SEL for Ctr1Out */
#define NISTC_AI_START_STOP_REG 62
#define NISTC_AI_START_POLARITY BIT(15)