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staging: comedi: addi_apci_1500: fix digital input 'insn_bits' function 

This driver does not follow the comedi API. The digital input 'insn_bits'
function is supposed to return the status of all the input channels in
data[1]. Currently this function returns the status in data[0].

Fix the function so it works like the comedi core expects.

The 'insn_read' and 'insn_Write' functions for the digital input subdevice
cannot be removed yet. This driver is again abusing the API and uses these
functions to initialize the board and start/stop "events" generated by the
board. These will be addressed later.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2012-11-06 10:13:06 -07:00 committed by Greg Kroah-Hartman
parent 7cfa1af0de
commit a9c2ba17be
2 changed files with 6 additions and 74 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.c
View File

@ -1042,83 +1042,15 @@ static int i_APCI1500_Initialisation(struct comedi_device *dev,
return insn->n; return insn->n;
} }
/* static int apci1500_di_insn_bits(struct comedi_device *dev,
+----------------------------------------------------------------------------+ struct comedi_subdevice *s,
| Function Name : int i_APCI1500_ReadMoreDigitalInput | struct comedi_insn *insn,
| (struct comedi_device *dev,struct comedi_subdevice *s, | unsigned int *data)
| struct comedi_insn *insn,unsigned int *data) |
+----------------------------------------------------------------------------+
| Task : Return the status of the Requested digital inputs |
+----------------------------------------------------------------------------+
| Input Parameters : struct comedi_device *dev : Driver handle |
| unsigned int ui_NoOfChannels : No Of Channels To be Read |
| unsigned int *data : Data Pointer
| data[0] : 0 Read a single channel
| 1 read a port value
| data[1] : port value
+----------------------------------------------------------------------------+
| Output Parameters : -- data[0] :The read status value
+----------------------------------------------------------------------------+
| Return Value : TRUE : No error occur |
| : FALSE : Error occur. Return the error |
| |
+----------------------------------------------------------------------------+
*/
static int i_APCI1500_ReadMoreDigitalInput(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{ {
struct addi_private *devpriv = dev->private; struct addi_private *devpriv = dev->private;
unsigned int ui_PortValue = data[1];
unsigned int ui_Mask = 0;
unsigned int ui_Channel;
unsigned int ui_TmpValue = 0;
ui_Channel = CR_CHAN(insn->chanspec);
switch (data[0]) { data[1] = inw(devpriv->i_IobaseAddon + APCI1500_DIGITAL_IP);
case 0:
if (ui_Channel <= 15) {
ui_TmpValue =
(unsigned int) inw(devpriv->i_IobaseAddon +
APCI1500_DIGITAL_IP);
*data = (ui_TmpValue >> ui_Channel) & 0x1;
} /* if(ui_Channel >= 0 && ui_Channel <=15) */
else {
printk("\nThe channel specification are in error\n");
return -EINVAL; /* "sorry channel spec wrong " */
} /* else if(ui_Channel >= 0 && ui_Channel <=15) */
break;
case 1:
*data = (unsigned int) inw(devpriv->i_IobaseAddon +
APCI1500_DIGITAL_IP);
switch (ui_Channel) {
case 2:
ui_Mask = 3;
*data = (*data >> (2 * ui_PortValue)) & ui_Mask;
break;
case 4:
ui_Mask = 15;
*data = (*data >> (4 * ui_PortValue)) & ui_Mask;
break;
case 8:
ui_Mask = 255;
*data = (*data >> (8 * ui_PortValue)) & ui_Mask;
break;
case 15:
break;
default:
printk("\nSpecified channel cannot be read \n");
return -EINVAL; /* "sorry channel spec wrong " */
break;
} /* switch(ui_Channel) */
break;
default:
printk("\nThe specified functionality does not exist\n");
return -EINVAL;
} /* switch(data[0]) */
return insn->n; return insn->n;
} }

2
drivers/staging/comedi/drivers/addi_apci_1500.c
View File

@ -26,7 +26,7 @@ static const struct addi_board apci1500_boardtypes[] = {
.di_config = i_APCI1500_ConfigDigitalInputEvent, .di_config = i_APCI1500_ConfigDigitalInputEvent,
.di_read = i_APCI1500_Initialisation, .di_read = i_APCI1500_Initialisation,
.di_write = i_APCI1500_StartStopInputEvent, .di_write = i_APCI1500_StartStopInputEvent,
.di_bits = i_APCI1500_ReadMoreDigitalInput, .di_bits = apci1500_di_insn_bits,
.do_config = i_APCI1500_ConfigDigitalOutputErrorInterrupt, .do_config = i_APCI1500_ConfigDigitalOutputErrorInterrupt,
.do_write = i_APCI1500_WriteDigitalOutput, .do_write = i_APCI1500_WriteDigitalOutput,
.do_bits = i_APCI1500_ConfigureInterrupt, .do_bits = i_APCI1500_ConfigureInterrupt,