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Date: Mon, 20 Aug 2012 11:28:28 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
<gregkh@...uxfoundation.org>
Subject: [PATCH 2/4] staging: comedi: aio_aio12_8: add ai and ao only card versions
Add the analog input and analog output only versions of the card
to the boardinfo. These cards all share the same i/o map.
Cleanup the attach so that the unsupported subdevices are not
initialized.
All of these boards also have an 8254 counter/timer. The 8254
device is not currently supported but stub in the subdevice
information so it can easily be added.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/staging/comedi/drivers/aio_aio12_8.c | 90 +++++++++++++++++++---------
1 file changed, 61 insertions(+), 29 deletions(-)
diff --git a/drivers/staging/comedi/drivers/aio_aio12_8.c b/drivers/staging/comedi/drivers/aio_aio12_8.c
index 71364c6..c06f5cb 100644
--- a/drivers/staging/comedi/drivers/aio_aio12_8.c
+++ b/drivers/staging/comedi/drivers/aio_aio12_8.c
@@ -25,8 +25,9 @@
Driver: aio_aio12_8
Description: Access I/O Products PC-104 AIO12-8 Analog I/O Board
Author: Pablo Mejia <pablo.mejia@...echnol.com>
-Devices:
- [Access I/O] PC-104 AIO12-8
+Devices: [Access I/O] PC-104 AIO12-8 (aio_aio12_8)
+ [Access I/O] PC-104 AI12-8 (aio_ai12_8)
+ [Access I/O] PC-104 AO12-8 (aio_ao12_8)
Status: experimental
Configuration Options:
@@ -73,11 +74,22 @@ Notes:
struct aio12_8_boardtype {
const char *name;
+ int ai_nchan;
+ int ao_nchan;
};
static const struct aio12_8_boardtype board_types[] = {
{
- .name = "aio_aio12_8"},
+ .name = "aio_aio12_8",
+ .ai_nchan = 8,
+ .ao_nchan = 4,
+ }, {
+ .name = "aio_ai12_8",
+ .ai_nchan = 8,
+ }, {
+ .name = "aio_ao12_8",
+ .ao_nchan = 4,
+ },
};
struct aio12_8_private {
@@ -167,18 +179,17 @@ static int aio_aio12_8_attach(struct comedi_device *dev,
{
const struct aio12_8_boardtype *board = comedi_board(dev);
struct aio12_8_private *devpriv;
- int iobase;
struct comedi_subdevice *s;
+ int iobase;
int ret;
+ dev->board_name = board->name;
+
iobase = it->options[0];
- if (!request_region(iobase, 24, "aio_aio12_8")) {
+ if (!request_region(iobase, 24, dev->board_name)) {
printk(KERN_ERR "I/O port conflict");
return -EIO;
}
-
- dev->board_name = board->name;
-
dev->iobase = iobase;
ret = alloc_private(dev, sizeof(*devpriv));
@@ -186,36 +197,57 @@ static int aio_aio12_8_attach(struct comedi_device *dev,
return ret;
devpriv = dev->private;
- ret = comedi_alloc_subdevices(dev, 3);
+ ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
- s = &dev->subdevices[0];
- s->type = COMEDI_SUBD_AI;
- s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
- s->n_chan = 8;
- s->maxdata = (1 << 12) - 1;
- s->range_table = &range_aio_aio12_8;
- s->insn_read = aio_aio12_8_ai_read;
-
- s = &dev->subdevices[1];
- s->type = COMEDI_SUBD_AO;
- s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF;
- s->n_chan = 4;
- s->maxdata = (1 << 12) - 1;
- s->range_table = &range_aio_aio12_8;
- s->insn_read = aio_aio12_8_ao_read;
- s->insn_write = aio_aio12_8_ao_write;
-
- s = &dev->subdevices[2];
- subdev_8255_init(dev, s, NULL, dev->iobase + AIO12_8_DIO_0);
+ s = dev->subdevices + 0;
+ if (board->ai_nchan) {
+ /* Analog input subdevice */
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
+ s->n_chan = board->ai_nchan;
+ s->maxdata = 0x0fff;
+ s->range_table = &range_aio_aio12_8;
+ s->insn_read = aio_aio12_8_ai_read;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = dev->subdevices + 1;
+ if (board->ao_nchan) {
+ /* Analog output subdevice */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF;
+ s->n_chan = 4;
+ s->maxdata = 0x0fff;
+ s->range_table = &range_aio_aio12_8;
+ s->insn_read = aio_aio12_8_ao_read;
+ s->insn_write = aio_aio12_8_ao_write;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = dev->subdevices + 2;
+ /* 8255 Digital i/o subdevice */
+ ret = subdev_8255_init(dev, s, NULL, dev->iobase + AIO12_8_DIO_0);
+ if (ret)
+ return ret;
+
+ s = dev->subdevices + 3;
+ /* 8254 counter/timer subdevice */
+ s->type = COMEDI_SUBD_UNUSED;
+
+ dev_info(dev->class_dev, "%s: %s attached\n",
+ dev->driver->driver_name, dev->board_name);
return 0;
}
static void aio_aio12_8_detach(struct comedi_device *dev)
{
- subdev_8255_cleanup(dev, &dev->subdevices[2]);
+ if (dev->subdevices)
+ subdev_8255_cleanup(dev, dev->subdevices + 2);
if (dev->iobase)
release_region(dev->iobase, 24);
}
--
1.7.11
--
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