Commit a4a25703 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
Browse files

staging: comedi: addi_apci_1564: fix digital output 'insn_bits' function 



This driver does not follow the comedi API. The digital output 'insn_bits'
function is passed a mask value in data[0] indicating which output bits in
data[1] are changing. The function is then supposed to update the outputs
accordingly and then return the current state of the outputs in data[1].

Currently this driver uses the 'insn_write' function to update either a
single or all the output channels. And it uses the 'insn_bits' function
to read either a single or all the output channel states.

Fix the 'insn_bits' function so it works like the comedi core expects. The
core can then use the function to emulate the 'insn_read' and 'insn_write'
functions for individual channels.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6b5d4328

drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c

+16 −239
Original line number Diff line number Diff line
@@ -258,250 +258,27 @@ static int i_APCI1564_ConfigDigitalOutput(struct comedi_device *dev, 
	return insn->n;

}



/*

+----------------------------------------------------------------------------+

| Function   Name   : int i_APCI1564_WriteDigitalOutput                      |

|			  (struct comedi_device *dev,struct comedi_subdevice *s,               |

|                      struct comedi_insn *insn,unsigned int *data)                     |

+----------------------------------------------------------------------------+

| Task              : Writes port value  To the selected port                |

+----------------------------------------------------------------------------+

| Input Parameters  : struct comedi_device *dev      : Driver handle                |

|                     unsigned int ui_NoOfChannels    : No Of Channels To Write      |

|                     unsigned int *data              : Data Pointer to read status  |

+----------------------------------------------------------------------------+

| Output Parameters :	--													 |

+----------------------------------------------------------------------------+

| Return Value      : TRUE  : No error occur                                 |

|		            : FALSE : Error occur. Return the error          |

|			                                                         |

+----------------------------------------------------------------------------+

*/

static int i_APCI1564_WriteDigitalOutput(struct comedi_device *dev,

static int apci1564_do_insn_bits(struct comedi_device *dev,

				 struct comedi_subdevice *s,

				 struct comedi_insn *insn,

				 unsigned int *data)

{

	struct addi_private *devpriv = dev->private;

	unsigned int ui_Temp, ui_Temp1;

	unsigned int ui_NoOfChannel;

	unsigned int mask = data[0];

	unsigned int bits = data[1];



	ui_NoOfChannel = CR_CHAN(insn->chanspec);

	if (devpriv->b_OutputMemoryStatus) {

		ui_Temp =

			inl(devpriv->i_IobaseAmcc + APCI1564_DIGITAL_OP +

			APCI1564_DIGITAL_OP_RW);

	}			/*  if  (devpriv->b_OutputMemoryStatus ) */

	else {

		ui_Temp = 0;

	}			/*  else if  (devpriv->b_OutputMemoryStatus ) */

	if (data[3] == 0) {

		if (data[1] == 0) {

			data[0] = (data[0] << ui_NoOfChannel) | ui_Temp;

			outl(data[0],

				devpriv->i_IobaseAmcc + APCI1564_DIGITAL_OP +

				APCI1564_DIGITAL_OP_RW);

		}		/*  if  (data[1]==0) */

		else {

			if (data[1] == 1) {

				switch (ui_NoOfChannel) {

				case 2:

					data[0] =

						(data[0] << (2 *

							data[2])) | ui_Temp;

					break;

				case 4:

					data[0] =

						(data[0] << (4 *

							data[2])) | ui_Temp;

					break;

				case 8:

					data[0] =

						(data[0] << (8 *

							data[2])) | ui_Temp;

					break;

				case 16:

					data[0] =

						(data[0] << (16 *

							data[2])) | ui_Temp;

					break;

				case 31:

					data[0] = data[0] | ui_Temp;

					break;

				default:

					comedi_error(dev, " chan spec wrong");

					return -EINVAL;	/*  "sorry channel spec wrong " */

				}	/*  switch (ui_NoOfChannels) */

				outl(data[0],

					devpriv->i_IobaseAmcc +

					APCI1564_DIGITAL_OP +

	s->state = inl(devpriv->i_IobaseAmcc + APCI1564_DIGITAL_OP +

			APCI1564_DIGITAL_OP_RW);

			}	/*  if  (data[1]==1) */

			else {

				printk("\nSpecified channel not supported\n");

			}	/*  else if  (data[1]==1) */

		}		/*  else if (data[1]==0) */

	}			/* if(data[3]==0) */

	else {

		if (data[3] == 1) {

			if (data[1] == 0) {

				data[0] = ~data[0] & 0x1;

				ui_Temp1 = 1;

				ui_Temp1 = ui_Temp1 << ui_NoOfChannel;

				ui_Temp = ui_Temp | ui_Temp1;

				data[0] =

					(data[0] << ui_NoOfChannel) ^

					0xffffffff;

				data[0] = data[0] & ui_Temp;

				outl(data[0],

					devpriv->i_IobaseAmcc +

					APCI1564_DIGITAL_OP +

					APCI1564_DIGITAL_OP_RW);

			}	/*  if  (data[1]==0) */

			else {

				if (data[1] == 1) {

					switch (ui_NoOfChannel) {

					case 2:

						data[0] = ~data[0] & 0x3;

						ui_Temp1 = 3;

						ui_Temp1 =

							ui_Temp1 << 2 * data[2];

						ui_Temp = ui_Temp | ui_Temp1;

						data[0] =

							((data[0] << (2 *

									data

									[2])) ^

							0xffffffff) & ui_Temp;

						break;

					case 4:

						data[0] = ~data[0] & 0xf;

						ui_Temp1 = 15;

						ui_Temp1 =

							ui_Temp1 << 4 * data[2];

						ui_Temp = ui_Temp | ui_Temp1;

						data[0] =

							((data[0] << (4 *

									data

									[2])) ^

							0xffffffff) & ui_Temp;

						break;

					case 8:

						data[0] = ~data[0] & 0xff;

						ui_Temp1 = 255;

						ui_Temp1 =

							ui_Temp1 << 8 * data[2];

						ui_Temp = ui_Temp | ui_Temp1;

						data[0] =

							((data[0] << (8 *

									data

									[2])) ^

							0xffffffff) & ui_Temp;

						break;

					case 16:

						data[0] = ~data[0] & 0xffff;

						ui_Temp1 = 65535;

						ui_Temp1 =

							ui_Temp1 << 16 *

							data[2];

						ui_Temp = ui_Temp | ui_Temp1;

						data[0] =

							((data[0] << (16 *

									data

									[2])) ^

							0xffffffff) & ui_Temp;

						break;

					case 31:

						break;

					default:

						comedi_error(dev,

							" chan spec wrong");

						return -EINVAL;	/*  "sorry channel spec wrong " */

					}	/* switch(ui_NoOfChannels) */

					outl(data[0],

						devpriv->i_IobaseAmcc +

						APCI1564_DIGITAL_OP +

						APCI1564_DIGITAL_OP_RW);

				}	/*  if  (data[1]==1) */

				else {

					printk("\nSpecified channel not supported\n");

				}	/*  else if  (data[1]==1) */

			}	/*  else if  (data[1]==0) */

		}		/*  if  (data[3]==1); */

		else {

			printk("\nSpecified functionality does not exist\n");

			return -EINVAL;

		}		/*  else if (data[3]==1) */

	}			/*  else if (data[3]==0) */

	return insn->n;

}

	if (mask) {

		s->state &= ~mask;

		s->state |= (bits & mask);



/*

+----------------------------------------------------------------------------+

| Function   Name   : int i_APCI1564_ReadDigitalOutput                       |

|			  (struct comedi_device *dev,struct comedi_subdevice *s,               |

|                      struct comedi_insn *insn,unsigned int *data)                     |

+----------------------------------------------------------------------------+

| Task              : Read  value  of the selected channel or port           |

+----------------------------------------------------------------------------+

| Input Parameters  : struct comedi_device *dev      : Driver handle                |

|                     unsigned int ui_NoOfChannels    : No Of Channels To read       |

|                     unsigned int *data              : Data Pointer to read status  |

+----------------------------------------------------------------------------+

| Output Parameters :	--													 |

+----------------------------------------------------------------------------+

| Return Value      : TRUE  : No error occur                                 |

|		            : FALSE : Error occur. Return the error          |

|			                                                         |

+----------------------------------------------------------------------------+

*/

static int i_APCI1564_ReadDigitalOutput(struct comedi_device *dev,

					struct comedi_subdevice *s,

					struct comedi_insn *insn,

					unsigned int *data)

{

	struct addi_private *devpriv = dev->private;

	unsigned int ui_Temp;

	unsigned int ui_NoOfChannel;



	ui_NoOfChannel = CR_CHAN(insn->chanspec);

	ui_Temp = data[0];

	*data = inl(devpriv->i_IobaseAmcc + APCI1564_DIGITAL_OP +

		outl(s->state, devpriv->i_IobaseAmcc + APCI1564_DIGITAL_OP +

			APCI1564_DIGITAL_OP_RW);

	if (ui_Temp == 0) {

		*data = (*data >> ui_NoOfChannel) & 0x1;

	}			/*  if  (ui_Temp==0) */

	else {

		if (ui_Temp == 1) {

			switch (ui_NoOfChannel) {

			case 2:

				*data = (*data >> (2 * data[1])) & 3;

				break;



			case 4:

				*data = (*data >> (4 * data[1])) & 15;

				break;



			case 8:

				*data = (*data >> (8 * data[1])) & 255;

				break;



			case 16:

				*data = (*data >> (16 * data[1])) & 65535;

				break;

	}



			case 31:

				break;

	data[1] = s->state;



			default:

				comedi_error(dev, " chan spec wrong");

				return -EINVAL;	/*  "sorry channel spec wrong " */

				break;

			}	/*  switch(ui_NoOfChannels) */

		}		/*  if  (ui_Temp==1) */

		else {

			printk("\nSpecified channel not supported \n");

		}		/*  else if (ui_Temp==1) */

	}			/*  else if  (ui_Temp==0) */

	return insn->n;

}

drivers/staging/comedi/drivers/addi_apci_1564.c

+1 −2
Original line number Diff line number Diff line
@@ -26,8 +26,7 @@ static const struct addi_board apci1564_boardtypes[] = { 
		.di_config		= i_APCI1564_ConfigDigitalInput,

		.di_bits		= apci1564_di_insn_bits,

		.do_config		= i_APCI1564_ConfigDigitalOutput,

		.do_write		= i_APCI1564_WriteDigitalOutput,

		.do_bits		= i_APCI1564_ReadDigitalOutput,

		.do_bits		= apci1564_do_insn_bits,

		.do_read		= i_APCI1564_ReadInterruptStatus,

		.timer_config		= i_APCI1564_ConfigTimerCounterWatchdog,

		.timer_write		= i_APCI1564_StartStopWriteTimerCounterWatchdog,