From 862edd6be5bad0b05f5166ccef38cc2062405cf1 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Mon, 20 Aug 2012 11:28:28 -0700 Subject: [PATCH] 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 Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- 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 -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); } -- 2.7.4