This function calls some helper functions to convert the counter variant
specific gate select bits into the generic enum ni_gpct_clock_source_bits
equivelent. These helper functions currently BUG() if the gate select
bits are invalid.
This should never happen but refactor the code to return -EINVAL instead
and remove the BUG() checks.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/ni_tio.c | 146 +++++++++++++++++++++-----------
1 file changed, 97 insertions(+), 49 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ni_tio.c b/drivers/staging/comedi/drivers/ni_tio.c
index 564ec9b..51dd368 100644
--- a/drivers/staging/comedi/drivers/ni_tio.c
+++ b/drivers/staging/comedi/drivers/ni_tio.c
@@ -1065,114 +1065,157 @@ static int ni_tio_set_other_src(struct ni_gpct *counter, unsigned int index,
return 0;
}
-static unsigned int ni_660x_gate_to_generic_gate(unsigned int gate)
+static int ni_660x_gate_to_generic_gate(unsigned int gate, unsigned int *src)
{
+ unsigned int source;
unsigned int i;
switch (gate) {
case NI_660X_SRC_PIN_I_GATE_SEL:
- return NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
+ source = NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
+ break;
case NI_660X_GATE_PIN_I_GATE_SEL:
- return NI_GPCT_GATE_PIN_i_GATE_SELECT;
+ source = NI_GPCT_GATE_PIN_i_GATE_SELECT;
+ break;
case NI_660X_NEXT_SRC_GATE_SEL:
- return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ source = NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ break;
case NI_660X_NEXT_OUT_GATE_SEL:
- return NI_GPCT_NEXT_OUT_GATE_SELECT;
+ source = NI_GPCT_NEXT_OUT_GATE_SELECT;
+ break;
case NI_660X_LOGIC_LOW_GATE_SEL:
- return NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ source = NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ break;
default:
for (i = 0; i <= NI_660X_MAX_RTSI_CHAN; ++i) {
- if (gate == NI_660X_RTSI_GATE_SEL(i))
- return NI_GPCT_RTSI_GATE_SELECT(i);
+ if (gate == NI_660X_RTSI_GATE_SEL(i)) {
+ source = NI_GPCT_RTSI_GATE_SELECT(i);
+ break;
+ }
}
+ if (i <= NI_660X_MAX_RTSI_CHAN)
+ break;
for (i = 0; i <= NI_660X_MAX_GATE_PIN; ++i) {
- if (gate == NI_660X_PIN_GATE_SEL(i))
- return NI_GPCT_GATE_PIN_GATE_SELECT(i);
+ if (gate == NI_660X_PIN_GATE_SEL(i)) {
+ source = NI_GPCT_GATE_PIN_GATE_SELECT(i);
+ break;
+ }
}
- BUG();
- break;
+ if (i <= NI_660X_MAX_GATE_PIN)
+ break;
+ return -EINVAL;
}
+ *src = source;
return 0;
};
-static unsigned int ni_m_gate_to_generic_gate(unsigned int gate)
+static int ni_m_gate_to_generic_gate(unsigned int gate, unsigned int *src)
{
+ unsigned int source;
unsigned int i;
switch (gate) {
case NI_M_TIMESTAMP_MUX_GATE_SEL:
- return NI_GPCT_TIMESTAMP_MUX_GATE_SELECT;
+ source = NI_GPCT_TIMESTAMP_MUX_GATE_SELECT;
+ break;
case NI_M_AI_START2_GATE_SEL:
- return NI_GPCT_AI_START2_GATE_SELECT;
+ source = NI_GPCT_AI_START2_GATE_SELECT;
+ break;
case NI_M_PXI_STAR_TRIGGER_GATE_SEL:
- return NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT;
+ source = NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT;
+ break;
case NI_M_NEXT_OUT_GATE_SEL:
- return NI_GPCT_NEXT_OUT_GATE_SELECT;
+ source = NI_GPCT_NEXT_OUT_GATE_SELECT;
+ break;
case NI_M_AI_START1_GATE_SEL:
- return NI_GPCT_AI_START1_GATE_SELECT;
+ source = NI_GPCT_AI_START1_GATE_SELECT;
+ break;
case NI_M_NEXT_SRC_GATE_SEL:
- return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ source = NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ break;
case NI_M_ANALOG_TRIG_OUT_GATE_SEL:
- return NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT;
+ source = NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT;
+ break;
case NI_M_LOGIC_LOW_GATE_SEL:
- return NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ source = NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ break;
default:
for (i = 0; i <= NI_M_MAX_RTSI_CHAN; ++i) {
- if (gate == NI_M_RTSI_GATE_SEL(i))
- return NI_GPCT_RTSI_GATE_SELECT(i);
+ if (gate == NI_M_RTSI_GATE_SEL(i)) {
+ source = NI_GPCT_RTSI_GATE_SELECT(i);
+ break;
+ }
}
+ if (i <= NI_M_MAX_RTSI_CHAN)
+ break;
for (i = 0; i <= NI_M_MAX_PFI_CHAN; ++i) {
- if (gate == NI_M_PFI_GATE_SEL(i))
- return NI_GPCT_PFI_GATE_SELECT(i);
+ if (gate == NI_M_PFI_GATE_SEL(i)) {
+ source = NI_GPCT_PFI_GATE_SELECT(i);
+ break;
+ }
}
- BUG();
- break;
+ if (i <= NI_M_MAX_PFI_CHAN)
+ break;
+ return -EINVAL;
}
+ *src = source;
return 0;
};
-static unsigned int ni_660x_gate2_to_generic_gate(unsigned int gate)
+static int ni_660x_gate2_to_generic_gate(unsigned int gate, unsigned int *src)
{
+ unsigned int source;
unsigned int i;
switch (gate) {
case NI_660X_SRC_PIN_I_GATE2_SEL:
- return NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
+ source = NI_GPCT_SOURCE_PIN_i_GATE_SELECT;
+ break;
case NI_660X_UD_PIN_I_GATE2_SEL:
- return NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT;
+ source = NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT;
+ break;
case NI_660X_NEXT_SRC_GATE2_SEL:
- return NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ source = NI_GPCT_NEXT_SOURCE_GATE_SELECT;
+ break;
case NI_660X_NEXT_OUT_GATE2_SEL:
- return NI_GPCT_NEXT_OUT_GATE_SELECT;
+ source = NI_GPCT_NEXT_OUT_GATE_SELECT;
+ break;
case NI_660X_SELECTED_GATE2_SEL:
- return NI_GPCT_SELECTED_GATE_GATE_SELECT;
+ source = NI_GPCT_SELECTED_GATE_GATE_SELECT;
+ break;
case NI_660X_LOGIC_LOW_GATE2_SEL:
- return NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ source = NI_GPCT_LOGIC_LOW_GATE_SELECT;
+ break;
default:
for (i = 0; i <= NI_660X_MAX_RTSI_CHAN; ++i) {
- if (gate == NI_660X_RTSI_GATE2_SEL(i))
- return NI_GPCT_RTSI_GATE_SELECT(i);
+ if (gate == NI_660X_RTSI_GATE2_SEL(i)) {
+ source = NI_GPCT_RTSI_GATE_SELECT(i);
+ break;
+ }
}
+ if (i <= NI_660X_MAX_RTSI_CHAN)
+ break;
for (i = 0; i <= NI_660X_MAX_UP_DOWN_PIN; ++i) {
- if (gate == NI_660X_UD_PIN_GATE2_SEL(i))
- return NI_GPCT_UP_DOWN_PIN_GATE_SELECT(i);
+ if (gate == NI_660X_UD_PIN_GATE2_SEL(i)) {
+ source = NI_GPCT_UP_DOWN_PIN_GATE_SELECT(i);
+ break;
+ }
}
- BUG();
- break;
+ if (i <= NI_660X_MAX_UP_DOWN_PIN)
+ break;
+ return -EINVAL;
}
+ *src = source;
return 0;
};
-static unsigned int ni_m_gate2_to_generic_gate(unsigned int gate)
+static int ni_m_gate2_to_generic_gate(unsigned int gate, unsigned int *src)
{
/*
* FIXME: the second gate sources for the m series are undocumented,
* so we just return the raw bits for now.
*/
- switch (gate) {
- default:
- return gate;
- }
+ *src = gate;
return 0;
};
@@ -1184,6 +1227,7 @@ static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned int gate_index,
unsigned int mode;
unsigned int reg;
unsigned int gate;
+ int ret;
mode = ni_tio_get_soft_copy(counter, NITIO_MODE_REG(cidx));
if (((mode & GI_GATING_MODE_MASK) == GI_GATING_DISABLED) ||
@@ -1202,12 +1246,14 @@ static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned int gate_index,
case ni_gpct_variant_e_series:
case ni_gpct_variant_m_series:
default:
- *gate_source = ni_m_gate_to_generic_gate(gate);
+ ret = ni_m_gate_to_generic_gate(gate, gate_source);
break;
case ni_gpct_variant_660x:
- *gate_source = ni_660x_gate_to_generic_gate(gate);
+ ret = ni_660x_gate_to_generic_gate(gate, gate_source);
break;
}
+ if (ret)
+ return ret;
if (mode & GI_GATE_POL_INVERT)
*gate_source |= CR_INVERT;
if ((mode & GI_GATING_MODE_MASK) != GI_LEVEL_GATING)
@@ -1221,12 +1267,14 @@ static int ni_tio_get_gate_src(struct ni_gpct *counter, unsigned int gate_index,
case ni_gpct_variant_e_series:
case ni_gpct_variant_m_series:
default:
- *gate_source = ni_m_gate2_to_generic_gate(gate);
+ ret = ni_m_gate2_to_generic_gate(gate, gate_source);
break;
case ni_gpct_variant_660x:
- *gate_source = ni_660x_gate2_to_generic_gate(gate);
+ ret = ni_660x_gate2_to_generic_gate(gate, gate_source);
break;
}
+ if (ret)
+ return ret;
if (counter_dev->regs[reg] & GI_GATE2_POL_INVERT)
*gate_source |= CR_INVERT;
/* second gate can't have edge/level mode set independently */
--
2.6.3
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