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staging: comedi: das1800: refactor 'range_ai' boardinfo 

The boards supported by this driver have analog inputs with gains
of 1, 10, 50, and 250 ("01" type) or 1, 2, 4, and 8 ("02" type).
Unfortunately, the "01"/"02" type cannot be determined from the
boards id or by probing.

Replace the 'range_ai' member of the boardinfo with a bit-field flag,
'is_01_series' and only set it for the "01" type boards. Remove the
unnecessary initialization for the "02" type boards.

For aesthetics, rename the comedi_lrange arrays and document the gain.

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 2016-04-08 12:41:44 -07:00 committed by Greg Kroah-Hartman
parent 8114b5ecb8
commit 5068827a78
1 changed files with 28 additions and 39 deletions
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67
drivers/staging/comedi/drivers/das1800.c
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@ -167,30 +167,29 @@ Unipolar and bipolar ranges cannot be mixed in the channel/gain list.
#define IOBASE2 0x400 /* offset of additional ioports used on 'ao' cards */
/* analog input ranges */
static const struct comedi_lrange range_ai_das1801 = {
static const struct comedi_lrange das1801_ai_range = {
8, {
BIP_RANGE(5),
BIP_RANGE(1),
BIP_RANGE(0.1),
BIP_RANGE(0.02),
UNI_RANGE(5),
UNI_RANGE(1),
UNI_RANGE(0.1),
UNI_RANGE(0.02)
BIP_RANGE(5), /* bipolar gain = 1 */
BIP_RANGE(1), /* bipolar gain = 10 */
BIP_RANGE(0.1), /* bipolar gain = 50 */
BIP_RANGE(0.02), /* bipolar gain = 250 */
UNI_RANGE(5), /* unipolar gain = 1 */
UNI_RANGE(1), /* unipolar gain = 10 */
UNI_RANGE(0.1), /* unipolar gain = 50 */
UNI_RANGE(0.02) /* unipolar gain = 250 */
}
};
static const struct comedi_lrange range_ai_das1802 = {
static const struct comedi_lrange das1802_ai_range = {
8, {
BIP_RANGE(10),
BIP_RANGE(5),
BIP_RANGE(2.5),
BIP_RANGE(1.25),
UNI_RANGE(10),
UNI_RANGE(5),
UNI_RANGE(2.5),
UNI_RANGE(1.25)
BIP_RANGE(10), /* bipolar gain = 1 */
BIP_RANGE(5), /* bipolar gain = 2 */
BIP_RANGE(2.5), /* bipolar gain = 4 */
BIP_RANGE(1.25), /* bipolar gain = 8 */
UNI_RANGE(10), /* unipolar gain = 1 */
UNI_RANGE(5), /* unipolar gain = 2 */
UNI_RANGE(2.5), /* unipolar gain = 4 */
UNI_RANGE(1.25) /* unipolar gain = 8 */
}
};
@ -228,7 +227,7 @@ struct das1800_board {
unsigned char id;
int ai_speed; /* max conversion period in nanoseconds */
int qram_len; /* length of card's channel / gain queue */
const struct comedi_lrange *range_ai; /* available input ranges */
unsigned int is_01_series:1;
};
/* Warning: the maximum conversion speeds listed below are
@ -241,126 +240,115 @@ static const struct das1800_board das1800_boards[] = {
.id = DAS1800_ID_ST,
.ai_speed = 6250,
.qram_len = 256,
.range_ai = &range_ai_das1801,
.is_01_series = 1,
},
[BOARD_DAS1701ST_DA] = {
.name = "das-1701st-da",
.id = DAS1800_ID_ST_DA,
.ai_speed = 6250,
.qram_len = 256,
.range_ai = &range_ai_das1801,
.is_01_series = 1,
},
[BOARD_DAS1702ST] = {
.name = "das-1702st",
.id = DAS1800_ID_ST,
.ai_speed = 6250,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1702ST_DA] = {
.name = "das-1702st-da",
.id = DAS1800_ID_ST_DA,
.ai_speed = 6250,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1702HR] = {
.name = "das-1702hr",
.id = DAS1800_ID_HR,
.ai_speed = 20000,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1702HR_DA] = {
.name = "das-1702hr-da",
.id = DAS1800_ID_HR_DA,
.ai_speed = 20000,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1701AO] = {
.name = "das-1701ao",
.id = DAS1800_ID_AO,
.ai_speed = 6250,
.qram_len = 256,
.range_ai = &range_ai_das1801,
.is_01_series = 1,
},
[BOARD_DAS1702AO] = {
.name = "das-1702ao",
.id = DAS1800_ID_AO,
.ai_speed = 6250,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1801ST] = {
.name = "das-1801st",
.id = DAS1800_ID_ST,
.ai_speed = 3000,
.qram_len = 256,
.range_ai = &range_ai_das1801,
.is_01_series = 1,
},
[BOARD_DAS1801ST_DA] = {
.name = "das-1801st-da",
.id = DAS1800_ID_ST_DA,
.ai_speed = 3000,
.qram_len = 256,
.range_ai = &range_ai_das1801,
.is_01_series = 1,
},
[BOARD_DAS1802ST] = {
.name = "das-1802st",
.id = DAS1800_ID_ST,
.ai_speed = 3000,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1802ST_DA] = {
.name = "das-1802st-da",
.id = DAS1800_ID_ST_DA,
.ai_speed = 3000,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1802HR] = {
.name = "das-1802hr",
.id = DAS1800_ID_HR,
.ai_speed = 10000,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1802HR_DA] = {
.name = "das-1802hr-da",
.id = DAS1800_ID_HR_DA,
.ai_speed = 10000,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1801HC] = {
.name = "das-1801hc",
.id = DAS1800_ID_HC,
.ai_speed = 3000,
.qram_len = 64,
.range_ai = &range_ai_das1801,
.is_01_series = 1,
},
[BOARD_DAS1802HC] = {
.name = "das-1802hc",
.id = DAS1800_ID_HC,
.ai_speed = 3000,
.qram_len = 64,
.range_ai = &range_ai_das1802,
},
[BOARD_DAS1801AO] = {
.name = "das-1801ao",
.id = DAS1800_ID_AO,
.ai_speed = 3000,
.qram_len = 256,
.range_ai = &range_ai_das1801,
.is_01_series = 1,
},
[BOARD_DAS1802AO] = {
.name = "das-1802ao",
.id = DAS1800_ID_AO,
.ai_speed = 3000,
.qram_len = 256,
.range_ai = &range_ai_das1802,
},
};
@ -1312,7 +1300,8 @@ static int das1800_attach(struct comedi_device *dev,
s->subdev_flags |= SDF_COMMON;
s->n_chan = board->qram_len;
s->maxdata = is_16bit ? 0xffff : 0x0fff;
s->range_table = board->range_ai;
s->range_table = board->is_01_series ? &das1801_ai_range
: &das1802_ai_range;
s->insn_read = das1800_ai_insn_read;
if (dev->irq) {
dev->read_subdev = s;