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@xxxxxxxxx>
---
drivers/staging/comedi/drivers/ni_mio_common.c | 101 +++++++++++++++++++++++++
drivers/staging/comedi/drivers/ni_stc.h | 6 +-
2 files changed, 106 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c
index ea4845d..76e2e77 100644
--- a/drivers/staging/comedi/drivers/ni_mio_common.c
+++ b/drivers/staging/comedi/drivers/ni_mio_common.c
@@ -5511,6 +5511,71 @@ 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);
+ case 1:
+ if (reg & NISTC_ATRIG_ETC_GPFO_1_ENA)
+ return NISTC_ATRIG_ETC_GPFO_1_SEL_TO_SRC(reg);
+ }
+
+ 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;
+ case 1:
+ devpriv->an_trig_etc_reg &= ~NISTC_ATRIG_ETC_GPFO_1_ENA;
+ 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);
+ 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;
+ 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
@@ -5542,6 +5607,16 @@ static inline 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);
@@ -5619,6 +5694,17 @@ static inline 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;
}
@@ -5667,6 +5753,16 @@ static inline 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;
}
@@ -6122,6 +6218,11 @@ 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;
diff --git a/drivers/staging/comedi/drivers/ni_stc.h b/drivers/staging/comedi/drivers/ni_stc.h
index 1e56741..e99790a 100644
--- a/drivers/staging/comedi/drivers/ni_stc.h
+++ b/drivers/staging/comedi/drivers/ni_stc.h
@@ -293,11 +293,15 @@
#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)
--
1.9.1
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