Provides the device-global routing interface for ni_660x devices. Using
the device-global names in comedi_cmd structures for commands was already
supported through the ni_tio module.
Signed-off-by: Spencer E. Olson <olsonse@xxxxxxxxx>
---
drivers/staging/comedi/drivers/ni_660x.c | 260 +++++++++++++++++++++++++++++++
1 file changed, 260 insertions(+)
diff --git a/drivers/staging/comedi/drivers/ni_660x.c b/drivers/staging/comedi/drivers/ni_660x.c
index 41c4960..bd1c9c1 100644
--- a/drivers/staging/comedi/drivers/ni_660x.c
+++ b/drivers/staging/comedi/drivers/ni_660x.c
@@ -572,6 +572,10 @@ static void ni_660x_select_pfi_output(struct comedi_device *dev,
unsigned int idle_chip = 0;
unsigned int bits;
+ if (chan >= NI_PFI(0))
+ /* allow new and old names of pfi channels to work. */
+ chan -= NI_PFI(0);
+
if (board->n_chips > 1) {
if (out_sel == NI_660X_PFI_OUTPUT_COUNTER &&
chan >= 8 && chan <= 23) {
@@ -607,6 +611,10 @@ static void ni_660x_set_pfi_direction(struct comedi_device *dev,
struct ni_660x_private *devpriv = dev->private;
u64 bit;
+ if (chan >= NI_PFI(0))
+ /* allow new and old names of pfi channels to work. */
+ chan -= NI_PFI(0);
+
bit = 1ULL << chan;
if (direction == COMEDI_OUTPUT) {
@@ -626,6 +634,10 @@ static unsigned int ni_660x_get_pfi_direction(struct comedi_device *dev,
struct ni_660x_private *devpriv = dev->private;
u64 bit;
+ if (chan >= NI_PFI(0))
+ /* allow new and old names of pfi channels to work. */
+ chan -= NI_PFI(0);
+
bit = 1ULL << chan;
return (devpriv->io_dir & bit) ? COMEDI_OUTPUT : COMEDI_INPUT;
@@ -636,6 +648,10 @@ static int ni_660x_set_pfi_routing(struct comedi_device *dev,
{
struct ni_660x_private *devpriv = dev->private;
+ if (chan >= NI_PFI(0))
+ /* allow new and old names of pfi channels to work. */
+ chan -= NI_PFI(0);
+
switch (source) {
case NI_660X_PFI_OUTPUT_COUNTER:
if (chan < 8)
@@ -658,6 +674,10 @@ static int ni_660x_get_pfi_routing(struct comedi_device *dev, unsigned int chan)
{
struct ni_660x_private *devpriv = dev->private;
+ if (chan >= NI_PFI(0))
+ /* allow new and old names of pfi channels to work. */
+ chan -= NI_PFI(0);
+
return devpriv->io_cfg[chan];
}
@@ -666,6 +686,10 @@ static void ni_660x_set_pfi_filter(struct comedi_device *dev,
{
unsigned int val;
+ if (chan >= NI_PFI(0))
+ /* allow new and old names of pfi channels to work. */
+ chan -= NI_PFI(0);
+
val = ni_660x_read(dev, 0, NI660X_IO_CFG(chan));
val &= ~NI660X_IO_CFG_IN_SEL_MASK(chan);
val |= NI660X_IO_CFG_IN_SEL(chan, value);
@@ -714,6 +738,235 @@ static int ni_660x_dio_insn_config(struct comedi_device *dev,
return insn->n;
}
+static unsigned int _ni_get_valid_routes(struct comedi_device *dev,
+ struct comedi_route_pair **pptr) {
+ struct ni_660x_private *devpriv = dev->private;
+
+ return ni_get_valid_routes(&devpriv->routing_tables, pptr);
+}
+
+/*
+ * Retrieves the current source of the output selector for the given
+ * destination. If the terminal for the destination is not already configured
+ * as an output, this function returns -EINVAL as error.
+ *
+ * Return: The register value of the destination output selector;
+ * -EINVAL if terminal is not configured for output.
+ */
+static inline int get_output_select_source(int dest, struct comedi_device *dev)
+{
+ struct ni_660x_private *devpriv = dev->private;
+ int reg = -1;
+
+ if (channel_is_pfi(dest)) {
+ if (ni_660x_get_pfi_direction(dev, dest) == COMEDI_OUTPUT)
+ reg = ni_660x_get_pfi_routing(dev, dest);
+ } else if (channel_is_rtsi(dest)) {
+ dev_dbg(dev->class_dev,
+ "%s: unhandled rtsi destination (%d) queried \n",
+ __func__, dest);
+ /*
+ * The following can be enabled when RTSI routing info is
+ * determined (not currently documented):
+ * if (ni_get_rtsi_direction(dev, dest) == COMEDI_OUTPUT) {
+ * reg = ni_get_rtsi_routing(dev, dest);
+
+ * if (reg == NI_RTSI_OUTPUT_RGOUT0) {
+ * dest = NI_RGOUT0; ** prepare for lookup below **
+ * reg = get_rgout0_reg(dev);
+ * } else if (reg >= NI_RTSI_OUTPUT_RTSI_BRD(0) &&
+ * reg <= NI_RTSI_OUTPUT_RTSI_BRD(3)) {
+ * const int i = reg - NI_RTSI_OUTPUT_RTSI_BRD(0);
+
+ * dest = NI_RTSI_BRD(i); ** prepare for lookup **
+ * reg = get_ith_rtsi_brd_reg(i, dev);
+ * }
+ * }
+ */
+ } else if (channel_is_ctr(dest)) {
+ reg = ni_tio_get_routing(devpriv->counter_dev, dest);
+ } else {
+ dev_dbg(dev->class_dev,
+ "%s: unhandled destination (%d) queried\n",
+ __func__, dest);
+ }
+
+ if (reg >= 0)
+ return ni_find_route_source(CR_CHAN(reg), dest,
+ &devpriv->routing_tables);
+ return -EINVAL;
+}
+
+/*
+ * Test a route:
+ *
+ * Return: -1 if not connectible;
+ * 0 if connectible and not connected;
+ * 1 if connectible and connected.
+ */
+static inline int test_route(unsigned int src, unsigned int dest,
+ struct comedi_device *dev)
+{
+ struct ni_660x_private *devpriv = dev->private;
+ s8 reg = ni_route_to_register(CR_CHAN(src), dest,
+ &devpriv->routing_tables);
+
+ if (reg < 0)
+ return -1;
+ if (get_output_select_source(dest, dev) != CR_CHAN(src))
+ return 0;
+ return 1;
+}
+
+/* Connect the actual route. */
+static inline int connect_route(unsigned int src, unsigned int dest,
+ struct comedi_device *dev)
+{
+ struct ni_660x_private *devpriv = dev->private;
+ s8 reg = ni_route_to_register(CR_CHAN(src), dest,
+ &devpriv->routing_tables);
+ s8 current_src;
+
+ if (reg < 0)
+ /* route is not valid */
+ return -EINVAL;
+
+ current_src = get_output_select_source(dest, dev);
+ if (current_src == CR_CHAN(src))
+ return -EALREADY;
+ if (current_src >= 0)
+ /* destination mux is already busy. complain, don't overwrite */
+ return -EBUSY;
+
+ /* The route is valid and available. Now connect... */
+ if (channel_is_pfi(CR_CHAN(dest))) {
+ /* set routing and then direction so that the output does not
+ * first get generated with the wrong pin */
+ ni_660x_set_pfi_routing(dev, dest, reg);
+ ni_660x_set_pfi_direction(dev, dest, COMEDI_OUTPUT);
+ } else if (channel_is_rtsi(CR_CHAN(dest))) {
+ dev_dbg(dev->class_dev, "%s: unhandled rtsi destination (%d)\n",
+ __func__, dest);
+ return -EINVAL;
+ /*
+ * The following can be enabled when RTSI routing info is
+ * determined (not currently documented):
+ * if (reg == NI_RTSI_OUTPUT_RGOUT0) {
+ * int ret = incr_rgout0_src_use(src, dev);
+
+ * if (ret < 0)
+ * return ret;
+ * } else if (ni_rtsi_route_requires_mux(reg)) {
+ * ** Attempt to allocate and route (src->brd) **
+ * int brd = incr_rtsi_brd_src_use(src, dev);
+
+ * if (brd < 0)
+ * return brd;
+
+ * ** Now lookup the register value for (brd->dest) **
+ * reg = ni_lookup_route_register(brd, CR_CHAN(dest),
+ * &devpriv->routing_tables);
+ * }
+
+ * ni_set_rtsi_direction(dev, dest, COMEDI_OUTPUT);
+ * ni_set_rtsi_routing(dev, dest, reg);
+ */
+ } else if (channel_is_ctr(CR_CHAN(dest))) {
+ /*
+ * we are adding back the channel modifier info to set
+ * invert/edge info passed by the user
+ */
+ ni_tio_set_routing(devpriv->counter_dev, dest,
+ reg | (src & ~CR_CHAN(-1)));
+ } else {
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static inline int disconnect_route(unsigned int src, unsigned int dest,
+ struct comedi_device *dev)
+{
+ struct ni_660x_private *devpriv = dev->private;
+ s8 reg = ni_route_to_register(CR_CHAN(src), CR_CHAN(dest),
+ &devpriv->routing_tables);
+
+ if (reg < 0)
+ /* route is not valid */
+ return -EINVAL;
+ if (get_output_select_source(dest, dev) != CR_CHAN(src))
+ /* cannot disconnect something not connected */
+ return -EINVAL;
+
+ /* The route is valid and is connected. Now disconnect... */
+ if (channel_is_pfi(CR_CHAN(dest))) {
+ unsigned int source = ((CR_CHAN(dest) - NI_PFI(0)) < 8)
+ ? NI_660X_PFI_OUTPUT_DIO
+ : NI_660X_PFI_OUTPUT_COUNTER;
+
+ /* set the pfi to high impedance, and disconnect */
+ ni_660x_set_pfi_direction(dev, dest, COMEDI_INPUT);
+ ni_660x_set_pfi_routing(dev, dest, source);
+ } else if (channel_is_rtsi(CR_CHAN(dest))) {
+ dev_dbg(dev->class_dev, "%s: unhandled rtsi destination (%d)\n",
+ __func__, dest);
+ return -EINVAL;
+ /*
+ * The following can be enabled when RTSI routing info is
+ * determined (not currently documented):
+ * if (reg == NI_RTSI_OUTPUT_RGOUT0) {
+ * int ret = decr_rgout0_src_use(src, dev);
+
+ * if (ret < 0)
+ * return ret;
+ * } else if (ni_rtsi_route_requires_mux(reg)) {
+ * ** find which RTSI_BRD line is source for rtsi pin **
+ * int brd = ni_find_route_source(
+ * ni_get_rtsi_routing(dev, dest), CR_CHAN(dest),
+ * &devpriv->routing_tables);
+
+ * if (brd < 0)
+ * return brd;
+
+ * ** decrement/disconnect RTSI_BRD line from source **
+ * decr_rtsi_brd_src_use(src, brd, dev);
+ * }
+
+ * ** set rtsi output selector to default state **
+ * reg = default_rtsi_routing[CR_CHAN(dest) - TRIGGER_LINE(0)];
+ * ni_set_rtsi_direction(dev, dest, COMEDI_INPUT);
+ * ni_set_rtsi_routing(dev, dest, reg);
+ */
+ } else if (channel_is_ctr(CR_CHAN(dest))) {
+ ni_tio_unset_routing(devpriv->counter_dev, dest);
+ } else {
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int ni_global_insn_config(struct comedi_device *dev,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ switch (data[0]) {
+ case INSN_DEVICE_CONFIG_TEST_ROUTE:
+ data[0] = test_route(data[1], data[2], dev);
+ return 2;
+ case INSN_DEVICE_CONFIG_CONNECT_ROUTE:
+ return connect_route(data[1], data[2], dev);
+ case INSN_DEVICE_CONFIG_DISCONNECT_ROUTE:
+ return disconnect_route(data[1], data[2], dev);
+ /*
+ * This case is already handled one level up.
+ * case INSN_DEVICE_CONFIG_GET_ROUTES:
+ */
+ default:
+ return -EINVAL;
+ }
+ return 1;
+}
+
static void ni_660x_init_tio_chips(struct comedi_device *dev,
unsigned int n_chips)
{
@@ -788,6 +1041,13 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
__func__, board->name);
dev_warn(dev->class_dev, "%s: High level NI signal names will not be available for this %s board.\n",
__func__, board->name);
+ } else {
+ /*
+ * only(?) assign insn_device_config if we have global names for
+ * this device.
+ */
+ dev->insn_device_config = ni_global_insn_config;
+ dev->get_valid_routes = _ni_get_valid_routes;
}
n_counters = board->n_chips * NI660X_COUNTERS_PER_CHIP;
--
1.9.1
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