diff options
author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2014-04-16 14:19:10 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-22 10:18:48 -0700 |
commit | e74592e0c01c6b9dc9c87146b7a894cfcb84d382 (patch) | |
tree | c8f4bdb511e4b5e441c4365a442ff6d0676fbbce | |
parent | e39a9704687efef22810c68defa9a4410dbd74c9 (diff) | |
download | linux-e74592e0c01c6b9dc9c87146b7a894cfcb84d382.tar.bz2 |
staging: comedi: cb_pcidas: factor out chanlist checking from (*do_cmdtest)
Step 5 of the (*do_cmdtest) validates that the cmd->chanlist is compatible
with the hardware.
For aesthetics, factor out the step 5 code for the analog input and analog
output async command support. Tidy up the factored out code.
To minimize the noise, change the comedi_error(), which is a wrapper around
dev_err(), to dev_dbg().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/staging/comedi/drivers/cb_pcidas.c | 80 |
1 files changed, 52 insertions, 28 deletions
diff --git a/drivers/staging/comedi/drivers/cb_pcidas.c b/drivers/staging/comedi/drivers/cb_pcidas.c index 83a265f3408c..70d926707777 100644 --- a/drivers/staging/comedi/drivers/cb_pcidas.c +++ b/drivers/staging/comedi/drivers/cb_pcidas.c @@ -803,6 +803,33 @@ static int trimpot_read_insn(struct comedi_device *dev, return 1; } +static int cb_pcidas_ai_check_chanlist(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + unsigned int chan0 = CR_CHAN(cmd->chanlist[0]); + unsigned int range0 = CR_RANGE(cmd->chanlist[0]); + int i; + + for (i = 1; i < cmd->chanlist_len; i++) { + unsigned int chan = CR_CHAN(cmd->chanlist[i]); + unsigned int range = CR_RANGE(cmd->chanlist[i]); + + if (chan != (chan0 + i) % s->n_chan) { + dev_dbg(dev->class_dev, + "entries in chanlist must be consecutive channels, counting upwards\n"); + return -EINVAL; + } + + if (range != range0) { + dev_dbg(dev->class_dev, + "entries in chanlist must all have the same gain\n"); + return -EINVAL; + } + } + return 0; +} + static int cb_pcidas_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) @@ -811,7 +838,6 @@ static int cb_pcidas_ai_cmdtest(struct comedi_device *dev, struct cb_pcidas_private *devpriv = dev->private; int err = 0; int tmp; - int i, gain, start_chan; /* Step 1 : check if triggers are trivially valid */ @@ -907,24 +933,9 @@ static int cb_pcidas_ai_cmdtest(struct comedi_device *dev, if (err) return 4; - /* check channel/gain list against card's limitations */ - if (cmd->chanlist) { - gain = CR_RANGE(cmd->chanlist[0]); - start_chan = CR_CHAN(cmd->chanlist[0]); - for (i = 1; i < cmd->chanlist_len; i++) { - if (CR_CHAN(cmd->chanlist[i]) != - (start_chan + i) % s->n_chan) { - comedi_error(dev, - "entries in chanlist must be consecutive channels, counting upwards\n"); - err++; - } - if (CR_RANGE(cmd->chanlist[i]) != gain) { - comedi_error(dev, - "entries in chanlist must all have the same gain\n"); - err++; - } - } - } + /* Step 5: check channel list if it exists */ + if (cmd->chanlist && cmd->chanlist_len > 0) + err |= cb_pcidas_ai_check_chanlist(dev, s, cmd); if (err) return 5; @@ -1035,6 +1046,25 @@ static int cb_pcidas_ai_cmd(struct comedi_device *dev, return 0; } +static int cb_pcidas_ao_check_chanlist(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + unsigned int chan0 = CR_CHAN(cmd->chanlist[0]); + + if (cmd->chanlist_len > 1) { + unsigned int chan1 = CR_CHAN(cmd->chanlist[1]); + + if (chan0 != 0 || chan1 != 1) { + dev_dbg(dev->class_dev, + "channels must be ordered channel 0, channel 1 in chanlist\n"); + return -EINVAL; + } + } + + return 0; +} + static int cb_pcidas_ao_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) @@ -1097,15 +1127,9 @@ static int cb_pcidas_ao_cmdtest(struct comedi_device *dev, if (err) return 4; - /* check channel/gain list against card's limitations */ - if (cmd->chanlist && cmd->chanlist_len > 1) { - if (CR_CHAN(cmd->chanlist[0]) != 0 || - CR_CHAN(cmd->chanlist[1]) != 1) { - comedi_error(dev, - "channels must be ordered channel 0, channel 1 in chanlist\n"); - err++; - } - } + /* Step 5: check channel list if it exists */ + if (cmd->chanlist && cmd->chanlist_len > 0) + err |= cb_pcidas_ao_check_chanlist(dev, s, cmd); if (err) return 5; |