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staging: comedi: das16: cleanup analog output subdevice

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All the boards supported by this driver that have analog outputs use
the same function to handle the (*insn_write) for the subdevice. They
all also have 12-bit resolution (maxdata = 0x0fff).

Remove the 'ao' and 'ao_nbits' members from the boardinfo and replace
them with a simple bit-field flag 'has_ao'.

Tidy up the subdevice init a bit as well as the (*insn_write) function.

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 2013-07-29 13:55:00 -07:00 committed by Greg Kroah-Hartman
parent 6050cc918d
commit 6d06385193
1 changed files with 33 additions and 62 deletions
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95
drivers/staging/comedi/drivers/das16.c
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@ -341,8 +341,7 @@ struct das16_board {
unsigned int ai_maxdata;
unsigned int ai_speed; /* max conversion speed in nanosec */
unsigned int ai_pg;
void *ao;
unsigned int ao_nbits;
unsigned int has_ao:1;
unsigned int i8255_offset;
unsigned int i8254_offset;
@ -740,29 +739,24 @@ static int das16_do_insn_bits(struct comedi_device *dev,
return insn->n;
}
static int das16_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
static int das16_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
const struct das16_board *board = comedi_board(dev);
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val;
int i;
int lsb, msb;
int chan;
chan = CR_CHAN(insn->chanspec);
for (i = 0; i < insn->n; i++) {
if (board->ao_nbits == 12) {
lsb = (data[i] << 4) & 0xff;
msb = (data[i] >> 4) & 0xff;
} else {
lsb = data[i] & 0xff;
msb = (data[i] >> 8) & 0xff;
}
outb(lsb, dev->iobase + DAS16_AO_LSB(chan));
outb(msb, dev->iobase + DAS16_AO_MSB(chan));
val = data[i];
val <<= 4;
outb(val & 0xff, dev->iobase + DAS16_AO_LSB(chan));
outb((val >> 8) & 0xff, dev->iobase + DAS16_AO_MSB(chan));
}
return i;
return insn->n;
}
/* the pc104-das16jr (at least) has problems if the dma
@ -1127,22 +1121,21 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
s->munge = das16_ai_munge;
}
/* Analog Output subdevice */
s = &dev->subdevices[1];
/* ao */
if (board->ao) {
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->maxdata = (1 << board->ao_nbits) - 1;
/* user defined ao range */
if (board->has_ao) {
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->maxdata = 0x0fff;
if (devpriv->user_ao_range_table)
s->range_table = devpriv->user_ao_range_table;
s->range_table = devpriv->user_ao_range_table;
else
s->range_table = &range_unknown;
s->range_table = &range_unknown;
s->insn_write = board->ao;
s->insn_write = das16_ao_insn_write;
} else {
s->type = COMEDI_SUBD_UNUSED;
s->type = COMEDI_SUBD_UNUSED;
}
/* Digital Input subdevice */
@ -1221,8 +1214,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 15000,
.ai_pg = das16_pg_none,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x10,
.i8254_offset = 0x0c,
.size = 0x14,
@ -1232,8 +1224,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 15000,
.ai_pg = das16_pg_none,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x10,
.i8254_offset = 0x0c,
.size = 0x14,
@ -1243,8 +1234,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 8500,
.ai_pg = das16_pg_none,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x10,
.i8254_offset = 0x0c,
.size = 0x14,
@ -1254,8 +1244,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 20000,
.ai_pg = das16_pg_none,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x10,
.i8254_offset = 0x0c,
.size = 0x14,
@ -1265,8 +1254,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 10000,
.ai_pg = das16_pg_none,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x10,
.i8254_offset = 0x0c,
.size = 0x14,
@ -1276,7 +1264,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 7692,
.ai_pg = das16_pg_16jr,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x10,
@ -1286,7 +1273,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 3300,
.ai_pg = das16_pg_16jr,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x10,
@ -1296,7 +1282,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0xffff,
.ai_speed = 10000,
.ai_pg = das16_pg_16jr_16,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x10,
@ -1306,7 +1291,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0xffff,
.ai_speed = 10000,
.ai_pg = das16_pg_16jr_16,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x10,
@ -1316,7 +1300,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 20000,
.ai_pg = das16_pg_none,
.ao = NULL,
.i8255_offset = 0x400,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1326,7 +1309,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 10000,
.ai_pg = das16_pg_none,
.ao = NULL,
.i8255_offset = 0x400,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1336,7 +1318,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 10000,
.ai_pg = das16_pg_1601,
.ao = NULL,
.i8255_offset = 0x0,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1346,7 +1327,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 10000,
.ai_pg = das16_pg_1602,
.ao = NULL,
.i8255_offset = 0x0,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1356,8 +1336,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 10000,
.ai_pg = das16_pg_1601,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x400,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1367,8 +1346,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 10000,
.ai_pg = das16_pg_1602,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x400,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1378,7 +1356,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 6250,
.ai_pg = das16_pg_1601,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1388,7 +1365,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 6250,
.ai_pg = das16_pg_1602,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1398,7 +1374,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0xffff,
.ai_speed = 10000,
.ai_pg = das16_pg_1602,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1408,8 +1383,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 6250,
.ai_pg = das16_pg_1601,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x400,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1419,8 +1393,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 10000,
.ai_pg = das16_pg_1602,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x400,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1430,8 +1403,7 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0xffff,
.ai_speed = 10000,
.ai_pg = das16_pg_1602,
.ao = das16_ao_winsn,
.ao_nbits = 12,
.has_ao = 1,
.i8255_offset = 0x400,
.i8254_offset = 0x0c,
.size = 0x408,
@ -1441,7 +1413,6 @@ static const struct das16_board das16_boards[] = {
.ai_maxdata = 0x0fff,
.ai_speed = 3030,
.ai_pg = das16_pg_16jr,
.ao = NULL,
.i8255_offset = 0,
.i8254_offset = 0x0c,
.size = 0x14,