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staging: comedi: cb_das16_cs: fix ai mux register programming

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The ai mux register is used program the hi/lo channels in a scan.
According to the user manual, the hi and lo channels should be
the same  to sample one channel.

Introduce some macros to set the appropriate bits in the ai mux
register and fix the ai (*insn_read).

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>
This commit is contained in:
H Hartley Sweeten
2015-10-12 16:07:04 -07:00
committed by Greg Kroah-Hartman
parent 2845efb967
commit 95ea3e760e
1 changed files with 6 additions and 1 deletions
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7
drivers/staging/comedi/drivers/cb_das16_cs.c
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@@ -46,6 +46,10 @@
*/
#define DAS16CS_AI_DATA_REG 0x00
#define DAS16CS_AI_MUX_REG 0x02
#define DAS16CS_AI_MUX_HI_CHAN(x) (((x) & 0xf) << 4)
#define DAS16CS_AI_MUX_LO_CHAN(x) (((x) & 0xf) << 0)
#define DAS16CS_AI_MUX_SINGLE_CHAN(x) (DAS16CS_AI_MUX_HI_CHAN(x) | \
DAS16CS_AI_MUX_LO_CHAN(x))
#define DAS16CS_MISC1_REG 0x04
#define DAS16CS_MISC2_REG 0x06
#define DAS16CS_TIMER_BASE 0x08
@@ -111,7 +115,8 @@ static int das16cs_ai_rinsn(struct comedi_device *dev,
int ret;
int i;
outw(chan, dev->iobase + DAS16CS_AI_MUX_REG);
outw(DAS16CS_AI_MUX_SINGLE_CHAN(chan),
dev->iobase + DAS16CS_AI_MUX_REG);
devpriv->status1 &= ~0xf320;
devpriv->status1 |= (aref == AREF_DIFF) ? 0 : 0x0020;