staging: comedi: addi_apci_3200: 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: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c
index 2f23ec9..1c2f26d 100644 (file)
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c
@@ -648,156 +648,25 @@ static int i_APCI3200_ConfigDigitalOutput(struct comedi_device *dev,
        return insn->n;
 }
 
-/*
- * Writes To the digital Output Subdevice
- *
- * data[0] = Value to output
- * data[1] = 0  o/p single channel
- *        = 1  o/p port
- * data[2] = port no
- * data[3] = 0  set the digital o/p on
- *        = 1  set the digital o/p off
- */
-static int i_APCI3200_WriteDigitalOutput(struct comedi_device *dev,
-                                        struct comedi_subdevice *s,
-                                        struct comedi_insn *insn,
-                                        unsigned int *data)
+static int apci3200_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 = 0, ui_Temp1 = 0;
-       unsigned int ui_NoOfChannel = CR_CHAN(insn->chanspec);  /*  get the channel */
+       unsigned int mask = data[0];
+       unsigned int bits = data[1];
 
-       if (devpriv->b_OutputMemoryStatus) {
-               ui_Temp = inl(devpriv->i_IobaseAddon);
-
-       }                       /* if(devpriv->b_OutputMemoryStatus ) */
-       else {
-               ui_Temp = 0;
-       }                       /* 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_IobaseAddon);
-               }               /* 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 3:
-                                       data[0] = (data[0] | ui_Temp);
-                                       break;
-                               }       /* switch(ui_NoOfChannels) */
-
-                               outl(data[0], devpriv->i_IobaseAddon);
-                       }       /*  if(data[1]==1) */
-                       else {
-                               printk("\nSpecified channel not supported\n");
-                       }       /* else if(data[1]==1) */
-               }               /* elseif(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) ^ 0xf;
-                               data[0] = data[0] & ui_Temp;
-                               outl(data[0], devpriv->i_IobaseAddon);
-                       }       /* 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])) ^
-                                                       0xf) & ui_Temp;
-
-                                               break;
-                                       case 3:
-                                               break;
-
-                                       default:
-                                               comedi_error(dev,
-                                                       " chan spec wrong");
-                                               return -EINVAL; /*  "sorry channel spec wrong " */
-                                       }       /* switch(ui_NoOfChannels) */
-
-                                       outl(data[0], devpriv->i_IobaseAddon);
-                               }       /*  if(data[1]==1) */
-                               else {
-                                       printk("\nSpecified channel not supported\n");
-                               }       /* else if(data[1]==1) */
-                       }       /* elseif(data[1]==0) */
-               }               /* if(data[3]==1); */
-               else {
-                       printk("\nSpecified functionality does not exist\n");
-                       return -EINVAL;
-               }               /* if else data[3]==1) */
-       }                       /* if else data[3]==0) */
-       return insn->n;
-}
+       s->state = inl(devpriv->i_IobaseAddon) & 0xf;
+       if (mask) {
+               s->state &= ~mask;
+               s->state |= (bits & mask)
 
-/*
- * Read  value  of the selected channel or port
- *
- * data[0] = 0  read single channel
- *        = 1  read port value
- * data[1] = port no
- */
-static int i_APCI3200_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_IobaseAddon);
-       if (ui_Temp == 0) {
-               *data = (*data >> ui_NoOfChannel) & 0x1;
-       }                       /*  if  (ui_Temp==0) */
-       else {
-               if (ui_Temp == 1) {
-                       if (data[1] < 0 || data[1] > 1) {
-                               printk("\nThe port selection is in error\n");
-                               return -EINVAL;
-                       }       /* if(data[1] <0 ||data[1] >1) */
-                       switch (ui_NoOfChannel) {
-                       case 2:
-                               *data = (*data >> (2 * data[1])) & 3;
-                               break;
+               outl(s->state, devpriv->i_IobaseAddon);
+       }
 
-                       case 3:
-                               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;
 }
 

diff --git a/drivers/staging/comedi/drivers/addi_apci_3200.c b/drivers/staging/comedi/drivers/addi_apci_3200.c
index 432cacc..890877f 100644 (file)
--- a/drivers/staging/comedi/drivers/addi_apci_3200.c
+++ b/drivers/staging/comedi/drivers/addi_apci_3200.c
@@ -51,8 +51,7 @@ static const struct addi_board apci3200_boardtypes[] = {
                .ai_cancel              = i_APCI3200_StopCyclicAcquisition,
                .di_bits                = apci3200_di_insn_bits,
                .do_config              = i_APCI3200_ConfigDigitalOutput,
-               .do_write               = i_APCI3200_WriteDigitalOutput,
-               .do_bits                = i_APCI3200_ReadDigitalOutput,
+               .do_bits                = apci3200_do_insn_bits,
        }, {
                .pc_DriverName          = "apci3300",
                .i_VendorId             = PCI_VENDOR_ID_ADDIDATA,
@@ -82,8 +81,7 @@ static const struct addi_board apci3200_boardtypes[] = {
                .ai_cancel              = i_APCI3200_StopCyclicAcquisition,
                .di_bits                = apci3200_di_insn_bits,
                .do_config              = i_APCI3200_ConfigDigitalOutput,
-               .do_write               = i_APCI3200_WriteDigitalOutput,
-               .do_bits                = i_APCI3200_ReadDigitalOutput,
+               .do_bits                = apci3200_do_insn_bits,
        },
 };