From fc2536fd814ea1e4399ccbfc913b5742e467320a Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 27 Jun 2012 15:00:50 -0700 Subject: [PATCH] staging: comedi: adl_pci6208: fix the digital i/o subdevice The PCI-6208 board has 4 digital outputs and 4 digital inputs. The support for the digital i/o subdevice was commented out and the code was just cut-and-paste from the skel driver. Enable the digital i/o subdevice by uncommenting the code and fixing the insn_bits and insn_config functions. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/adl_pci6208.c | 106 +++++++++++++-------------- 1 file changed, 50 insertions(+), 56 deletions(-) diff --git a/drivers/staging/comedi/drivers/adl_pci6208.c b/drivers/staging/comedi/drivers/adl_pci6208.c index 13cdbcc..e3f459b 100644 --- a/drivers/staging/comedi/drivers/adl_pci6208.c +++ b/drivers/staging/comedi/drivers/adl_pci6208.c @@ -137,54 +137,45 @@ static int pci6208_ao_rinsn(struct comedi_device *dev, return i; } -/* DIO devices are slightly special. Although it is possible to - * implement the insn_read/insn_write interface, it is much more - * useful to applications if you implement the insn_bits interface. - * This allows packed reading/writing of the DIO channels. The - * comedi core can convert between insn_bits and insn_read/write */ -/* static int pci6208_dio_insn_bits(struct comedi_device *dev, - * struct comedi_subdevice *s, */ -/* struct comedi_insn *insn,unsigned int *data) */ -/* { */ - /* The insn data is a mask in data[0] and the new data - * in data[1], each channel cooresponding to a bit. */ -/* if(data[0]){ */ -/* s->state &= ~data[0]; */ -/* s->state |= data[0]&data[1]; */ - /* Write out the new digital output lines */ - /* outw(s->state,dev->iobase + SKEL_DIO); */ -/* } */ - - /* on return, data[1] contains the value of the digital - * input and output lines. */ - /* data[1]=inw(dev->iobase + SKEL_DIO); */ - /* or we could just return the software copy of the output values if - * it was a purely digital output subdevice */ - /* data[1]=s->state; */ - -/* return insn->n; */ -/* } */ - -/* static int pci6208_dio_insn_config(struct comedi_device *dev, - * struct comedi_subdevice *s, */ -/* struct comedi_insn *insn,unsigned int *data) */ -/* { */ -/* int chan=CR_CHAN(insn->chanspec); */ - - /* The input or output configuration of each digital line is - * configured by a special insn_config instruction. chanspec - * contains the channel to be changed, and data[0] contains the - * value COMEDI_INPUT or COMEDI_OUTPUT. */ - -/* if(data[0]==COMEDI_OUTPUT){ */ -/* s->io_bits |= 1<io_bits &= ~(1<io_bits,dev->iobase + SKEL_DIO_CONFIG); */ - -/* return 1; */ -/* } */ +static int pci6208_dio_insn_bits(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + unsigned int mask = data[0] & PCI6208_DIO_DO_MASK; + unsigned int bits = data[1]; + + if (mask) { + s->state &= ~mask; + s->state |= bits & mask; + + outw(s->state, dev->iobase + PCI6208_DIO); + } + + s->state = inw(dev->iobase + PCI6208_DIO); + data[1] = s->state; + + return insn->n; +} + +static int pci6208_dio_insn_config(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + int chan = CR_CHAN(insn->chanspec); + unsigned int mask = 1 << chan; + + switch (data[0]) { + case INSN_CONFIG_DIO_QUERY: + data[1] = (s->io_bits & mask) ? COMEDI_OUTPUT : COMEDI_INPUT; + break; + default: + return -EINVAL; + } + + return insn->n; +} static struct pci_dev *pci6208_find_device(struct comedi_device *dev, struct comedi_devconfig *it) @@ -268,15 +259,18 @@ static int pci6208_attach(struct comedi_device *dev, s->insn_write = pci6208_ao_winsn; s->insn_read = pci6208_ao_rinsn; - /* s=dev->subdevices+1; */ + s = dev->subdevices + 1; /* digital i/o subdevice */ - /* s->type=COMEDI_SUBD_DIO; */ - /* s->subdev_flags=SDF_READABLE|SDF_WRITABLE; */ - /* s->n_chan=16; */ - /* s->maxdata=1; */ - /* s->range_table=&range_digital; */ - /* s->insn_bits = pci6208_dio_insn_bits; */ - /* s->insn_config = pci6208_dio_insn_config; */ + s->type = COMEDI_SUBD_DIO; + s->subdev_flags = SDF_READABLE | SDF_WRITABLE; + s->n_chan = 8; + s->maxdata = 1; + s->range_table = &range_digital; + s->insn_bits = pci6208_dio_insn_bits; + s->insn_config = pci6208_dio_insn_config; + + s->io_bits = 0x0f; + s->state = inw(dev->iobase + PCI6208_DIO); dev_info(dev->class_dev, "%s: %s, I/O base=0x%04lx\n", dev->driver->driver_name, dev->board_name, dev->iobase); -- 2.7.4