staging: comedi: addi_apci_1564: remove private data 'mode_select_register'

This driver currently passes the timer channel as the data[5] element to the
timer (*insn_config) function. This is stored in the private data and use in
the timer (*insn_read) and (*insn_write) functions to read/write the timer.

This is just wrong, comedi passes the channel number in the insn->chanspec.
Use that instead and remove the private data member.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: 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_apci1564.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
index 45f9772..ad9949c 100644 (file)
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
@@ -75,6 +75,7 @@ static int apci1564_timer_config(struct comedi_device *dev,
                                 unsigned int *data)
 {
        struct apci1564_private *devpriv = dev->private;
+       unsigned int chan = CR_CHAN(insn->chanspec);
        unsigned int ul_Command1 = 0;
 
        devpriv->tsk_current = current;
@@ -115,19 +116,18 @@ static int apci1564_timer_config(struct comedi_device *dev,
                outl(ul_Command1, devpriv->amcc_iobase + APCI1564_TIMER_CTRL_REG);
        } else if (data[0] == ADDIDATA_COUNTER) {
                devpriv->timer_select_mode = ADDIDATA_COUNTER;
-               devpriv->mode_select_register = data[5];
 
                /* First Stop The Counter */
                ul_Command1 = inl(dev->iobase +
-                                APCI1564_COUNTER_CTRL_REG(data[5] - 1));
+                                APCI1564_COUNTER_CTRL_REG(chan));
                ul_Command1 = ul_Command1 & 0xFFFFF9FEUL;
                /* Stop The Timer */
                outl(ul_Command1, dev->iobase +
-                                       APCI1564_COUNTER_CTRL_REG(data[5] - 1));
+                                       APCI1564_COUNTER_CTRL_REG(chan));
 
                /* Set the reload value */
                outl(data[3], dev->iobase +
-                                       APCI1564_COUNTER_RELOAD_REG(data[5] - 1));
+                                       APCI1564_COUNTER_RELOAD_REG(chan));
 
                /* Set the mode :             */
                /* - Disable the hardware     */
@@ -141,17 +141,17 @@ static int apci1564_timer_config(struct comedi_device *dev,
                        (ul_Command1 & 0xFFFC19E2UL) | 0x80000UL |
                        (unsigned int) ((unsigned int) data[4] << 16UL);
                outl(ul_Command1, dev->iobase +
-                                       APCI1564_COUNTER_CTRL_REG(data[5] - 1));
+                                       APCI1564_COUNTER_CTRL_REG(chan));
 
                /*  Enable or Disable Interrupt */
                ul_Command1 = (ul_Command1 & 0xFFFFF9FD) | (data[1] << 1);
                outl(ul_Command1, dev->iobase +
-                                       APCI1564_COUNTER_CTRL_REG(data[5] - 1));
+                                       APCI1564_COUNTER_CTRL_REG(chan));
 
                /* Set the Up/Down selection */
                ul_Command1 = (ul_Command1 & 0xFFFBF9FFUL) | (data[6] << 18);
                outl(ul_Command1, dev->iobase +
-                                       APCI1564_COUNTER_CTRL_REG(data[5] - 1));
+                                       APCI1564_COUNTER_CTRL_REG(chan));
        } else {
                dev_err(dev->class_dev, "Invalid subdevice.\n");
        }
@@ -170,6 +170,7 @@ static int apci1564_timer_write(struct comedi_device *dev,
                                unsigned int *data)
 {
        struct apci1564_private *devpriv = dev->private;
+       unsigned int chan = CR_CHAN(insn->chanspec);
        unsigned int ul_Command1 = 0;
 
        if (devpriv->timer_select_mode == ADDIDATA_TIMER) {
@@ -189,7 +190,7 @@ static int apci1564_timer_write(struct comedi_device *dev,
        } else if (devpriv->timer_select_mode == ADDIDATA_COUNTER) {
                ul_Command1 =
                        inl(dev->iobase +
-                          APCI1564_COUNTER_CTRL_REG(devpriv->mode_select_register - 1));
+                          APCI1564_COUNTER_CTRL_REG(chan));
                if (data[1] == 1) {
                        /* Start the Counter subdevice */
                        ul_Command1 = (ul_Command1 & 0xFFFFF9FFUL) | 0x1UL;
@@ -202,7 +203,7 @@ static int apci1564_timer_write(struct comedi_device *dev,
                        ul_Command1 = (ul_Command1 & 0xFFFFF9FFUL) | 0x400;
                }
                outl(ul_Command1, dev->iobase +
-                    APCI1564_COUNTER_CTRL_REG(devpriv->mode_select_register - 1));
+                    APCI1564_COUNTER_CTRL_REG(chan));
        } else {
                dev_err(dev->class_dev, "Invalid subdevice.\n");
        }
@@ -218,6 +219,7 @@ static int apci1564_timer_read(struct comedi_device *dev,
                               unsigned int *data)
 {
        struct apci1564_private *devpriv = dev->private;
+       unsigned int chan = CR_CHAN(insn->chanspec);
        unsigned int ul_Command1 = 0;
 
        if (devpriv->timer_select_mode == ADDIDATA_TIMER) {
@@ -230,10 +232,10 @@ static int apci1564_timer_read(struct comedi_device *dev,
                /*  Read the Counter Actual Value. */
                data[0] =
                        inl(dev->iobase +
-                           APCI1564_COUNTER_REG(devpriv->mode_select_register - 1));
+                           APCI1564_COUNTER_REG(chan));
                ul_Command1 =
                        inl(dev->iobase +
-                           APCI1564_COUNTER_STATUS_REG(devpriv->mode_select_register - 1));
+                           APCI1564_COUNTER_STATUS_REG(chan));
 
                /* Get the software trigger status */
                data[1] = (unsigned char) ((ul_Command1 >> 1) & 1);

diff --git a/drivers/staging/comedi/drivers/addi_apci_1564.c b/drivers/staging/comedi/drivers/addi_apci_1564.c
index b95da41..c328230 100644 (file)
--- a/drivers/staging/comedi/drivers/addi_apci_1564.c
+++ b/drivers/staging/comedi/drivers/addi_apci_1564.c
@@ -37,7 +37,6 @@ struct apci1564_private {
        unsigned int mode2;             /* falling-edge/low level channels */
        unsigned int ctrl;              /* interrupt mode OR (edge) . AND (level) */
        unsigned char timer_select_mode;
-       unsigned char mode_select_register;
        struct task_struct *tsk_current;
 };