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authorIan Abbott <abbotti@mev.co.uk>2009-09-21 15:29:59 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-10-09 13:47:24 -0700
commit10f27014f42f0a4cb32bf45f214fa7ad7c261b1e (patch)
tree66ad044771f15b83058cf8bc1f1cfc506f201ee7 /drivers
parentaa65d22ae6412f474e5ba23fc363137b6c53eef9 (diff)
Staging: comedi: s526: Fix number of channels on DIO subdevice
Correct operation of INSN_CONFIG_DIO_INPUT and INSN_CONFIG_DIO_OUTPUT and support INSN_CONFIG_DIO_QUERY. Thanks to Alessio Margan for some testing. Signed-off-by: Frank Mori Hess <fmhess@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/staging/comedi/drivers/s526.c35
1 files changed, 20 insertions, 15 deletions
diff --git a/drivers/staging/comedi/drivers/s526.c b/drivers/staging/comedi/drivers/s526.c
index b89e1ec267c..736441f3c81 100644
--- a/drivers/staging/comedi/drivers/s526.c
+++ b/drivers/staging/comedi/drivers/s526.c
@@ -375,7 +375,7 @@ static int s526_attach(struct comedi_device *dev, struct comedi_devconfig *it)
if (thisboard->have_dio) {
s->type = COMEDI_SUBD_DIO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
- s->n_chan = 2;
+ s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = s526_dio_insn_bits;
@@ -949,7 +949,7 @@ static int s526_dio_insn_bits(struct comedi_device *dev,
data[1] = inw(ADDR_REG(REG_DIO)) & 0xFF; /* low 8 bits are the data */
/* or we could just return the software copy of the output values if
* it was a purely digital output subdevice */
- /* data[1]=s->state; */
+ /* data[1]=s->state & 0xFF; */
return 2;
}
@@ -959,28 +959,33 @@ static int s526_dio_insn_config(struct comedi_device *dev,
struct comedi_insn *insn, unsigned int *data)
{
int chan = CR_CHAN(insn->chanspec);
- short value;
+ int group, mask;
printk("S526 DIO insn_config\n");
- if (insn->n != 1)
- return -EINVAL;
-
- value = inw(ADDR_REG(REG_DIO));
-
/* The input or output configuration of each digital line is
* configured by a special insn_config instruction. chanspec
* contains the channel to be changed, and data[0] contains the
* value COMEDI_INPUT or COMEDI_OUTPUT. */
- if (data[0] == COMEDI_OUTPUT) {
- value |= 1 << (chan + 10); /* bit 10/11 set the group 1/2's mode */
- s->io_bits |= (0xF << chan);
- } else {
- value &= ~(1 << (chan + 10)); /* 1 is output, 0 is input. */
- s->io_bits &= ~(0xF << chan);
+ group = chan >> 2;
+ mask = 0xF << (group << 2);
+ switch (data[0]) {
+ case INSN_CONFIG_DIO_OUTPUT:
+ s->state |= 1 << (group + 10); // bit 10/11 set the group 1/2's mode
+ s->io_bits |= mask;
+ break;
+ case INSN_CONFIG_DIO_INPUT:
+ s->state &= ~(1 << (group + 10));// 1 is output, 0 is input.
+ s->io_bits &= ~mask;
+ break;
+ case INSN_CONFIG_DIO_QUERY:
+ data[1] = (s->io_bits & mask) ? COMEDI_OUTPUT : COMEDI_INPUT;
+ return insn->n;
+ default:
+ return -EINVAL;
}
- outw(value, ADDR_REG(REG_DIO));
+ outw(s->state, ADDR_REG(REG_DIO));
return 1;
}