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staging: comedi: ni_labpc: introduce labpc_range_is_unipolar()

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Introduce a helper function to determine if a range selection is
bipolar or unipolar.

This allows removing the static data 'labpc_range_is_unipolar' and
'labpc_plus_is_unipolar' as well as the boardinfo 'ai_range_is_unipolar'.

For consistency, also use the helper in labpc_ao_winsn() when
checking the range.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-03-22 09:42:48 -07:00 committed by Greg Kroah-Hartman
parent 4d3cc8ab55
commit 43a9411a67
3 changed files with 15 additions and 22 deletions
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34
drivers/staging/comedi/drivers/ni_labpc.c
View File

@ -215,11 +215,6 @@ enum scan_mode {
MODE_MULT_CHAN_DOWN,
};
static const int labpc_plus_is_unipolar[] = {
0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1,
};
static const int labpc_plus_ai_gain_bits[] = {
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
@ -246,12 +241,6 @@ static const struct comedi_lrange range_labpc_plus_ai = {
}
};
const int labpc_1200_is_unipolar[] = {
0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1,
};
EXPORT_SYMBOL_GPL(labpc_1200_is_unipolar);
const int labpc_1200_ai_gain_bits[] = {
0x00, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
0x00, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,
@ -278,7 +267,6 @@ const struct comedi_lrange range_labpc_1200_ai = {
};
EXPORT_SYMBOL_GPL(range_labpc_1200_ai);
#define AO_RANGE_IS_UNIPOLAR 0x1
static const struct comedi_lrange range_labpc_ao = {
2, {
BIP_RANGE(5),
@ -317,7 +305,6 @@ static const struct labpc_boardinfo labpc_boards[] = {
.has_ao = 1,
.ai_range_table = &range_labpc_1200_ai,
.ai_range_code = labpc_1200_ai_gain_bits,
.ai_range_is_unipolar = labpc_1200_is_unipolar,
.ai_scan_up = 1,
}, {
.name = "lab-pc-1200ai",
@ -326,7 +313,6 @@ static const struct labpc_boardinfo labpc_boards[] = {
.register_layout = labpc_1200_layout,
.ai_range_table = &range_labpc_1200_ai,
.ai_range_code = labpc_1200_ai_gain_bits,
.ai_range_is_unipolar = labpc_1200_is_unipolar,
.ai_scan_up = 1,
}, {
.name = "lab-pc+",
@ -336,7 +322,6 @@ static const struct labpc_boardinfo labpc_boards[] = {
.has_ao = 1,
.ai_range_table = &range_labpc_plus_ai,
.ai_range_code = labpc_plus_ai_gain_bits,
.ai_range_is_unipolar = labpc_plus_is_unipolar,
},
#ifdef CONFIG_COMEDI_PCI_DRIVERS
{
@ -348,7 +333,6 @@ static const struct labpc_boardinfo labpc_boards[] = {
.has_ao = 1,
.ai_range_table = &range_labpc_1200_ai,
.ai_range_code = labpc_1200_ai_gain_bits,
.ai_range_is_unipolar = labpc_1200_is_unipolar,
.ai_scan_up = 1,
.has_mmio = 1,
},
@ -360,6 +344,18 @@ static const int dma_buffer_size = 0xff00;
/* 2 bytes per sample */
static const int sample_size = 2;
static bool labpc_range_is_unipolar(struct comedi_subdevice *s,
unsigned int range)
{
const struct comedi_lrange *lrange = s->range_table;
const struct comedi_krange *krange = &lrange->range[range];
if (krange->min < 0)
return false;
else
return true;
}
static void labpc_clear_adc_fifo(const struct comedi_device *dev)
{
struct labpc_private *devpriv = dev->private;
@ -409,7 +405,7 @@ static int labpc_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
else
devpriv->cmd6 &= ~ADC_COMMON_BIT;
/* bipolar or unipolar range? */
if (board->ai_range_is_unipolar[range])
if (labpc_range_is_unipolar(s, range))
devpriv->cmd6 |= ADC_UNIP_BIT;
else
devpriv->cmd6 &= ~ADC_UNIP_BIT;
@ -938,7 +934,7 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
else
devpriv->cmd6 &= ~ADC_COMMON_BIT;
/* bipolar or unipolar range? */
if (board->ai_range_is_unipolar[range])
if (labpc_range_is_unipolar(s, range))
devpriv->cmd6 |= ADC_UNIP_BIT;
else
devpriv->cmd6 &= ~ADC_UNIP_BIT;
@ -1363,7 +1359,7 @@ static int labpc_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
/* set range */
if (board->register_layout == labpc_1200_layout) {
range = CR_RANGE(insn->chanspec);
if (range & AO_RANGE_IS_UNIPOLAR)
if (labpc_range_is_unipolar(s, range))
devpriv->cmd6 |= DAC_UNIP_BIT(channel);
else
devpriv->cmd6 &= ~DAC_UNIP_BIT(channel);

2
drivers/staging/comedi/drivers/ni_labpc.h
View File

@ -44,7 +44,6 @@ struct labpc_boardinfo {
int has_ao; /* has analog output true/false */
const struct comedi_lrange *ai_range_table;
const int *ai_range_code;
const int *ai_range_is_unipolar;
/* board can auto scan up in ai channels, not just down */
unsigned ai_scan_up:1;
@ -105,7 +104,6 @@ int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
unsigned int irq, unsigned int dma);
void labpc_common_detach(struct comedi_device *dev);
extern const int labpc_1200_is_unipolar[];
extern const int labpc_1200_ai_gain_bits[];
extern const struct comedi_lrange range_labpc_1200_ai;

1
drivers/staging/comedi/drivers/ni_labpc_cs.c
View File

@ -83,7 +83,6 @@ static const struct labpc_boardinfo labpc_cs_boards[] = {
.has_ao = 1,
.ai_range_table = &range_labpc_1200_ai,
.ai_range_code = labpc_1200_ai_gain_bits,
.ai_range_is_unipolar = labpc_1200_is_unipolar,
},
};