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staging: comedi: adv_pci1710: change boardinfo 'n_aochan' to 'has_ao'

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Some of the boards supported by this driver have analog outputs. The pci1720
board has 4 analog output channels and the others have 2.

For aesthetics, change the 'n_aochan' member to a bit-field flag 'has_ao' and
refactor the board attach accordingly. Remove the unnecessary initialization
of the subdevice 'len_chanlist'. That member is only used by subdevices that
support async commands.

Also, remove the unnecessary 'number of channels' check in pci171x_reset().
The boards that used this function, and have analog outputs, always have 2
channels.

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 2015-01-20 14:53:07 -07:00 committed by Greg Kroah-Hartman
parent 7bd428c434
commit 87abf66091
1 changed files with 12 additions and 14 deletions
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26
drivers/staging/comedi/drivers/adv_pci1710.c
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@ -193,13 +193,13 @@ struct boardtype {
const char *name; /* board name */
char cardtype; /* 0=1710& co. 2=1713, ... */
int n_aichan; /* num of A/D chans */
int n_aochan; /* num of D/A chans */
const struct comedi_lrange *rangelist_ai; /* rangelist for A/D */
const char *rangecode_ai; /* range codes for programming */
const struct comedi_lrange *rangelist_ao; /* rangelist for D/A */
unsigned int has_irq:1;
unsigned int has_large_fifo:1; /* 4K or 1K FIFO */
unsigned int has_diff_ai:1;
unsigned int has_ao:1;
unsigned int has_di_do:1;
unsigned int has_counter:1;
};
@ -209,13 +209,13 @@ static const struct boardtype boardtypes[] = {
.name = "pci1710",
.cardtype = TYPE_PCI171X,
.n_aichan = 16,
.n_aochan = 2,
.rangelist_ai = &range_pci1710_3,
.rangecode_ai = range_codes_pci1710_3,
.rangelist_ao = &range_pci171x_da,
.has_irq = 1,
.has_large_fifo = 1,
.has_diff_ai = 1,
.has_ao = 1,
.has_di_do = 1,
.has_counter = 1,
},
@ -223,13 +223,13 @@ static const struct boardtype boardtypes[] = {
.name = "pci1710hg",
.cardtype = TYPE_PCI171X,
.n_aichan = 16,
.n_aochan = 2,
.rangelist_ai = &range_pci1710hg,
.rangecode_ai = range_codes_pci1710hg,
.rangelist_ao = &range_pci171x_da,
.has_irq = 1,
.has_large_fifo = 1,
.has_diff_ai = 1,
.has_ao = 1,
.has_di_do = 1,
.has_counter = 1,
},
@ -237,11 +237,11 @@ static const struct boardtype boardtypes[] = {
.name = "pci1711",
.cardtype = TYPE_PCI171X,
.n_aichan = 16,
.n_aochan = 2,
.rangelist_ai = &range_pci17x1,
.rangecode_ai = range_codes_pci17x1,
.rangelist_ao = &range_pci171x_da,
.has_irq = 1,
.has_ao = 1,
.has_di_do = 1,
.has_counter = 1,
},
@ -258,8 +258,8 @@ static const struct boardtype boardtypes[] = {
[BOARD_PCI1720] = {
.name = "pci1720",
.cardtype = TYPE_PCI1720,
.n_aochan = 4,
.rangelist_ao = &range_pci1720,
.has_ao = 1,
},
[BOARD_PCI1731] = {
.name = "pci1731",
@ -1008,15 +1008,13 @@ static int pci171x_reset(struct comedi_device *dev)
outb(0, dev->iobase + PCI171x_CLRINT); /* clear INT request */
pci171x_start_pacer(dev, false);
devpriv->da_ranges = 0;
if (this_board->n_aochan) {
if (this_board->has_ao) {
/* set DACs to 0..5V */
outb(devpriv->da_ranges, dev->iobase + PCI171x_DAREF);
outw(0, dev->iobase + PCI171x_DA1); /* set DA outputs to 0V */
devpriv->ao_data[0] = 0x0000;
if (this_board->n_aochan > 1) {
outw(0, dev->iobase + PCI171x_DA2);
devpriv->ao_data[1] = 0x0000;
}
outw(0, dev->iobase + PCI171x_DA2);
devpriv->ao_data[1] = 0x0000;
}
outw(0, dev->iobase + PCI171x_DO); /* digital outputs to 0 */
outb(0, dev->iobase + PCI171x_CLRFIFO); /* clear FIFO */
@ -1091,7 +1089,7 @@ static int pci1710_auto_attach(struct comedi_device *dev,
n_subdevices = 0;
if (this_board->n_aichan)
n_subdevices++;
if (this_board->n_aochan)
if (this_board->has_ao)
n_subdevices++;
if (this_board->has_di_do)
n_subdevices += 2;
@ -1134,19 +1132,19 @@ static int pci1710_auto_attach(struct comedi_device *dev,
subdev++;
}
if (this_board->n_aochan) {
if (this_board->has_ao) {
s = &dev->subdevices[subdev];
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
s->n_chan = this_board->n_aochan;
s->maxdata = 0x0fff;
s->len_chanlist = this_board->n_aochan;
s->range_table = this_board->rangelist_ao;
switch (this_board->cardtype) {
case TYPE_PCI1720:
s->n_chan = 4;
s->insn_write = pci1720_insn_write_ao;
break;
default:
s->n_chan = 2;
s->insn_write = pci171x_insn_write_ao;
break;
}