The comedi core expects the (*insn_write) functions to write insn->n
values. Fix this function to work like the core expects.
The counters are actually 25-bit (24-bits + 1 sign bit). The comedi core
validates that all the data is in range before calling the (*insn_write),
fix the subdevice maxdata so that the sign bit can actually be changed.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/ke_counter.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ke_counter.c
b/drivers/staging/comedi/drivers/ke_counter.c
index e751482..5dfe2bb 100644
--- a/drivers/staging/comedi/drivers/ke_counter.c
+++ b/drivers/staging/comedi/drivers/ke_counter.c
@@ -54,19 +54,21 @@ static int ke_counter_insn_write(struct comedi_device *dev,
struct comedi_insn *insn,
unsigned int *data)
{
- int chan = CR_CHAN(insn->chanspec);
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int val;
+ int i;
- outb((unsigned char)((data[0] >> 24) & 0xff),
- dev->iobase + KE_SIGN_REG(chan));
- outb((unsigned char)((data[0] >> 16) & 0xff),
- dev->iobase + KE_MSB_REG(chan));
- outb((unsigned char)((data[0] >> 8) & 0xff),
- dev->iobase + KE_MID_REG(chan));
- outb((unsigned char)((data[0] >> 0) & 0xff),
- dev->iobase + KE_LSB_REG(chan));
+ for (i = 0; i < insn->n; i++) {
+ val = data[0];
- /* return the number of samples written */
- return 1;
+ /* Order matters */
+ outb((val >> 24) & 0xff, dev->iobase + KE_SIGN_REG(chan));
+ outb((val >> 16) & 0xff, dev->iobase + KE_MSB_REG(chan));
+ outb((val >> 8) & 0xff, dev->iobase + KE_MID_REG(chan));
+ outb((val >> 0) & 0xff, dev->iobase + KE_LSB_REG(chan));
+ }
+
+ return insn->n;
}
static int ke_counter_insn_read(struct comedi_device *dev,
@@ -114,7 +116,7 @@ static int cnt_auto_attach(struct comedi_device *dev,
s->type = COMEDI_SUBD_COUNTER;
s->subdev_flags = SDF_READABLE;
s->n_chan = 3;
- s->maxdata = 0x00ffffff;
+ s->maxdata = 0x01ffffff;
s->range_table = &range_unknown;
s->insn_read = ke_counter_insn_read;
s->insn_write = ke_counter_insn_write;
--
1.8.5.2
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