Staging: comedi: usbdux: remove // comments

This converts all // comments to be /* */

Cc: Bernd Porr <BerndPorr@f2s.com>
Cc: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 364 insertions, 349 deletions

diff --git a/drivers/staging/comedi/drivers/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c
index 3c51607a2e0..ba4e3fdc9bf 100644
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -78,8 +78,8 @@ sampling rate. If you sample two channels you get 4kHz and so on.
  *
  */
 
-// generates loads of debug info
-// #define NOISY_DUX_DEBUGBUG
+/* generates loads of debug info */
+/* #define NOISY_DUX_DEBUGBUG */
 
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -96,111 +96,117 @@ sampling rate. If you sample two channels you get 4kHz and so on.
 
 #define BOARDNAME "usbdux"
 
-// timeout for the USB-transfer
+/* timeout for the USB-transfer */
 #define EZTIMEOUT 30
 
-// constants for "firmware" upload and download
+/* constants for "firmware" upload and download */
 #define USBDUXSUB_FIRMWARE 0xA0
 #define VENDOR_DIR_IN  0xC0
 #define VENDOR_DIR_OUT 0x40
 
-// internal adresses of the 8051 processor
+/* internal adresses of the 8051 processor */
 #define USBDUXSUB_CPUCS 0xE600
 
-// the minor device number, major is 180
-// only for debugging purposes and to
-// upload special firmware (programming the
-// eeprom etc) which is not compatible with
-// the comedi framwork
+/*
+ * the minor device number, major is 180 only for debugging purposes and to
+ * upload special firmware (programming the eeprom etc) which is not compatible
+ * with the comedi framwork
+ */
 #define USBDUXSUB_MINOR 32
 
-// max lenghth of the transfer-buffer for software upload
+/* max lenghth of the transfer-buffer for software upload */
 #define TB_LEN 0x2000
 
-// Input endpoint number: ISO/IRQ
+/* Input endpoint number: ISO/IRQ */
 #define ISOINEP           6
 
-// Output endpoint number: ISO/IRQ
+/* Output endpoint number: ISO/IRQ */
 #define ISOOUTEP          2
 
-// This EP sends DUX commands to USBDUX
+/* This EP sends DUX commands to USBDUX */
 #define COMMAND_OUT_EP     1
 
-// This EP receives the DUX commands from USBDUX
+/* This EP receives the DUX commands from USBDUX */
 #define COMMAND_IN_EP        8
 
-// Output endpoint for PWM
+/* Output endpoint for PWM */
 #define PWM_EP         4
 
-// 300Hz max frequ under PWM
+/* 300Hz max frequ under PWM */
 #define MIN_PWM_PERIOD  ((long)(1E9/300))
 
-// Default PWM frequency
+/* Default PWM frequency */
 #define PWM_DEFAULT_PERIOD ((long)(1E9/100))
 
-// Number of channels
+/* Number of channels */
 #define NUMCHANNELS       8
 
-// Size of one A/D value
+/* Size of one A/D value */
 #define SIZEADIN          ((sizeof(int16_t)))
 
-// Size of the input-buffer IN BYTES
-// Always multiple of 8 for 8 microframes which is needed in the highspeed mode
+/* Size of the input-buffer IN BYTES */
+/* Always multiple of 8 for 8 microframes which is needed in the highspeed mode */
 #define SIZEINBUF         ((8*SIZEADIN))
 
-// 16 bytes.
+/* 16 bytes. */
 #define SIZEINSNBUF       16
 
-// Number of DA channels
+/* Number of DA channels */
 #define NUMOUTCHANNELS    8
 
-// size of one value for the D/A converter: channel and value
+/* size of one value for the D/A converter: channel and value */
 #define SIZEDAOUT          ((sizeof(int8_t)+sizeof(int16_t)))
 
-// Size of the output-buffer in bytes
-// Actually only the first 4 triplets are used but for the
-// high speed mode we need to pad it to 8 (microframes).
+/*
+ * Size of the output-buffer in bytes
+ * Actually only the first 4 triplets are used but for the
+ * high speed mode we need to pad it to 8 (microframes).
+ */
 #define SIZEOUTBUF         ((8*SIZEDAOUT))
 
-// Size of the buffer for the dux commands: just now max size is determined
-// by the analogue out + command byte + panic bytes...
+/*
+ * Size of the buffer for the dux commands: just now max size is determined
+ * by the analogue out + command byte + panic bytes...
+ */
 #define SIZEOFDUXBUFFER    ((8*SIZEDAOUT+2))
 
-// Number of in-URBs which receive the data: min=2
+/* Number of in-URBs which receive the data: min=2 */
 #define NUMOFINBUFFERSFULL     5
 
-// Number of out-URBs which send the data: min=2
+/* Number of out-URBs which send the data: min=2 */
 #define NUMOFOUTBUFFERSFULL    5
 
-// Number of in-URBs which receive the data: min=5
-#define NUMOFINBUFFERSHIGH     10       // must have more buffers due to buggy USB ctr
+/* Number of in-URBs which receive the data: min=5 */
+/* must have more buffers due to buggy USB ctr */
+#define NUMOFINBUFFERSHIGH     10
 
-// Number of out-URBs which send the data: min=5
-#define NUMOFOUTBUFFERSHIGH    10       // must have more buffers due to buggy USB ctr
+/* Number of out-URBs which send the data: min=5 */
+/* must have more buffers due to buggy USB ctr */
+#define NUMOFOUTBUFFERSHIGH    10
 
-// Total number of usbdux devices
+/* Total number of usbdux devices */
 #define NUMUSBDUX             16
 
-// Analogue in subdevice
+/* Analogue in subdevice */
 #define SUBDEV_AD             0
 
-// Analogue out subdevice
+/* Analogue out subdevice */
 #define SUBDEV_DA             1
 
-// Digital I/O
+/* Digital I/O */
 #define SUBDEV_DIO            2
 
-// counter
+/* counter */
 #define SUBDEV_COUNTER        3
 
-// timer aka pwm output
+/* timer aka pwm output */
 #define SUBDEV_PWM            4
 
-// number of retries to get the right dux command
+/* number of retries to get the right dux command */
 #define RETRIES 10
 
-/////////////////////////////////////////////
-// comedi constants
+/**************************************************/
+/* comedi constants */
 static const comedi_lrange range_usbdux_ai_range = { 4, {
                         BIP_RANGE(4.096),
                         BIP_RANGE(4.096 / 2),
@@ -219,83 +225,87 @@ static const comedi_lrange range_usbdux_ao_range = { 2, {
  * private structure of one subdevice
  */
 
-// This is the structure which holds all the data of this driver
-// one sub device just now: A/D
+/*
+ * This is the structure which holds all the data of
+ * this driver one sub device just now: A/D
+ */
 typedef struct {
-        // attached?
+        /* attached? */
         int attached;
-        // is it associated with a subdevice?
+        /* is it associated with a subdevice? */
         int probed;
-        // pointer to the usb-device
+        /* pointer to the usb-device */
         struct usb_device *usbdev;
-        // actual number of in-buffers
+        /* actual number of in-buffers */
         int numOfInBuffers;
-        // actual number of out-buffers
+        /* actual number of out-buffers */
         int numOfOutBuffers;
-        // ISO-transfer handling: buffers
+        /* ISO-transfer handling: buffers */
         struct urb **urbIn;
         struct urb **urbOut;
-        // pwm-transfer handling
+        /* pwm-transfer handling */
         struct urb *urbPwm;
-        // PWM period
+        /* PWM period */
         lsampl_t pwmPeriod;
-        // PWM internal delay for the GPIF in the FX2
+        /* PWM internal delay for the GPIF in the FX2 */
         int8_t pwmDelay;
-        // size of the PWM buffer which holds the bit pattern
+        /* size of the PWM buffer which holds the bit pattern */
         int sizePwmBuf;
-        // input buffer for the ISO-transfer
+        /* input buffer for the ISO-transfer */
         int16_t *inBuffer;
-        // input buffer for single insn
+        /* input buffer for single insn */
         int16_t *insnBuffer;
-        // output buffer for single DA outputs
+        /* output buffer for single DA outputs */
         int16_t *outBuffer;
-        // interface number
+        /* interface number */
         int ifnum;
-        // interface structure in 2.6
+        /* interface structure in 2.6 */
         struct usb_interface *interface;
-        // comedi device for the interrupt context
+        /* comedi device for the interrupt context */
         comedi_device *comedidev;
-        // is it USB_SPEED_HIGH or not?
+        /* is it USB_SPEED_HIGH or not? */
         short int high_speed;
-        // asynchronous command is running
+        /* asynchronous command is running */
         short int ai_cmd_running;
         short int ao_cmd_running;
-        // pwm is running
+        /* pwm is running */
         short int pwm_cmd_running;
-        // continous aquisition
+        /* continous aquisition */
         short int ai_continous;
         short int ao_continous;
-        // number of samples to aquire
+        /* number of samples to aquire */
         int ai_sample_count;
         int ao_sample_count;
-        // time between samples in units of the timer
+        /* time between samples in units of the timer */
         unsigned int ai_timer;
         unsigned int ao_timer;
-        // counter between aquisitions
+        /* counter between aquisitions */
         unsigned int ai_counter;
         unsigned int ao_counter;
-        // interval in frames/uframes
+        /* interval in frames/uframes */
         unsigned int ai_interval;
-        // D/A commands
+        /* D/A commands */
         int8_t *dac_commands;
-        // commands
+        /* commands */
         int8_t *dux_commands;
         struct semaphore sem;
 } usbduxsub_t;
 
-// The pointer to the private usb-data of the driver
-// is also the private data for the comedi-device.
-// This has to be global as the usb subsystem needs
-// global variables. The other reason is that this
-// structure must be there _before_ any comedi
-// command is issued. The usb subsystem must be
-// initialised before comedi can access it.
+/*
+ * The pointer to the private usb-data of the driver is also the private data
+ * for the comedi-device.  This has to be global as the usb subsystem needs
+ * global variables. The other reason is that this structure must be there
+ * _before_ any comedi command is issued. The usb subsystem must be initialised
+ * before comedi can access it.
+ */
 static usbduxsub_t usbduxsub[NUMUSBDUX];
 
 static DECLARE_MUTEX(start_stop_sem);
 
-// Stops the data acquision
-// It should be safe to call this function from any context
+/*
+ * Stops the data acquision
+ * It should be safe to call this function from any context
+ */
 static int usbduxsub_unlink_InURBs(usbduxsub_t *usbduxsub_tmp)
 {
         int i = 0;
@@ -304,8 +314,8 @@ static int usbduxsub_unlink_InURBs(usbduxsub_t *usbduxsub_tmp)
         if (usbduxsub_tmp && usbduxsub_tmp->urbIn) {
                 for (i = 0; i < usbduxsub_tmp->numOfInBuffers; i++) {
                         if (usbduxsub_tmp->urbIn[i]) {
-                                // We wait here until all transfers
-                                // have been cancelled.
+                                /* We wait here until all transfers have been
+                                 * cancelled. */
                                 usb_kill_urb(usbduxsub_tmp->urbIn[i]);
                         }
 #ifdef NOISY_DUX_DEBUGBUG
@@ -335,7 +345,7 @@ static int usbdux_ai_stop(usbduxsub_t *this_usbduxsub, int do_unlink)
 #endif
 
         if (do_unlink) {
-                // stop aquistion
+                /* stop aquistion */
                 ret = usbduxsub_unlink_InURBs(this_usbduxsub);
         }
 
@@ -344,15 +354,16 @@ static int usbdux_ai_stop(usbduxsub_t *this_usbduxsub, int do_unlink)
         return ret;
 }
 
-// This will cancel a running acquisition operation.
-// This is called by comedi but never from inside the
-// driver.
+/*
+ * This will cancel a running acquisition operation.
+ * This is called by comedi but never from inside the driver.
+ */
 static int usbdux_ai_cancel(comedi_device * dev, comedi_subdevice * s)
 {
         usbduxsub_t *this_usbduxsub;
         int res = 0;
 
-        // force unlink of all urbs
+        /* force unlink of all urbs */
 #ifdef NOISY_DUX_DEBUGBUG
         printk("comedi: usbdux_ai_cancel\n");
 #endif
@@ -361,20 +372,19 @@ static int usbdux_ai_cancel(comedi_device * dev, comedi_subdevice * s)
                 printk("comedi: usbdux_ai_cancel: this_usbduxsub=NULL\n");
                 return -EFAULT;
         }
-        // prevent other CPUs from submitting new commands just now
+        /* prevent other CPUs from submitting new commands just now */
         down(&this_usbduxsub->sem);
         if (!(this_usbduxsub->probed)) {
                 up(&this_usbduxsub->sem);
                 return -ENODEV;
         }
-        // unlink only if the urb really has been submitted
+        /* unlink only if the urb really has been submitted */
         res = usbdux_ai_stop(this_usbduxsub, this_usbduxsub->ai_cmd_running);
         up(&this_usbduxsub->sem);
         return res;
 }
 
-// analogue IN
-// interrupt service routine
+/* analogue IN - interrupt service routine */
 static void usbduxsub_ai_IsocIrq(struct urb *urb)
 {
         int i, err, n;
@@ -382,38 +392,38 @@ static void usbduxsub_ai_IsocIrq(struct urb *urb)
         comedi_device *this_comedidev;
         comedi_subdevice *s;
 
-        // sanity checks
-        // is the urb there?
+        /* sanity checks */
+        /* is the urb there? */
         if (!urb) {
                 printk("comedi_: usbdux_: ao int-handler called with urb=NULL!\n");
                 return;
         }
-        // the context variable points to the subdevice
+        /* the context variable points to the subdevice */
         this_comedidev = urb->context;
         if (unlikely(!this_comedidev)) {
                 printk("comedi_: usbdux_: BUG! urb context is a NULL pointer!\n");
                 return;
         }
-        // the private structure of the subdevice is usbduxsub_t
+        /* the private structure of the subdevice is usbduxsub_t */
         this_usbduxsub = this_comedidev->private;
         if (unlikely(!this_usbduxsub)) {
                 printk("comedi_: usbdux_: BUG! private of comedi subdev is a NULL pointer!\n");
                 return;
         }
-        // subdevice which is the AD converter
+        /* subdevice which is the AD converter */
         s = this_comedidev->subdevices + SUBDEV_AD;
 
-        // first we test if something unusual has just happened
+        /* first we test if something unusual has just happened */
         switch (urb->status) {
         case 0:
-                // copy the result in the transfer buffer
+                /* copy the result in the transfer buffer */
                 memcpy(this_usbduxsub->inBuffer,
                         urb->transfer_buffer, SIZEINBUF);
                 break;
         case -EILSEQ:
-                // error in the ISOchronous data
-                // we don't copy the data into the transfer buffer
-                // and recycle the last data byte
+                /* error in the ISOchronous data */
+                /* we don't copy the data into the transfer buffer */
+                /* and recycle the last data byte */
 #ifdef CONFIG_COMEDI_DEBUG
                 printk("comedi%d: usbdux: CRC error in ISO IN stream.\n",
                         this_usbduxsub->comedidev->minor);
@@ -421,42 +431,43 @@ static void usbduxsub_ai_IsocIrq(struct urb *urb)
 
                 break;
 
-                // happens after an unlink command
         case -ECONNRESET:
         case -ENOENT:
         case -ESHUTDOWN:
         case -ECONNABORTED:
+                /* happens after an unlink command */
                 if (this_usbduxsub->ai_cmd_running) {
-                        // we are still running a command
-                        // tell this comedi
+                        /* we are still running a command */
+                        /* tell this comedi */
                         s->async->events |= COMEDI_CB_EOA;
                         s->async->events |= COMEDI_CB_ERROR;
                         comedi_event(this_usbduxsub->comedidev, s);
-                        // stop the transfer w/o unlink
+                        /* stop the transfer w/o unlink */
                         usbdux_ai_stop(this_usbduxsub, 0);
                 }
                 return;
 
-                // a real error on the bus
         default:
-                // pass error to comedi if we are really running a command
+                /* a real error on the bus */
+                /* pass error to comedi if we are really running a command */
                 if (this_usbduxsub->ai_cmd_running) {
                         printk("Non-zero urb status received in ai intr context: %d\n", urb->status);
                         s->async->events |= COMEDI_CB_EOA;
                         s->async->events |= COMEDI_CB_ERROR;
                         comedi_event(this_usbduxsub->comedidev, s);
-                        // don't do an unlink here
+                        /* don't do an unlink here */
                         usbdux_ai_stop(this_usbduxsub, 0);
                 }
                 return;
         }
 
-        // at this point we are reasonably sure that nothing dodgy has happened
-        // are we running a command?
+        /* at this point we are reasonably sure that nothing dodgy has happened */
+        /* are we running a command? */
         if (unlikely((!(this_usbduxsub->ai_cmd_running)))) {
-                // not running a command
-                // do not continue execution if no asynchronous command is running
-                // in particular not resubmit
+                /*
+                 * not running a command, do not continue execution if no
+                 * asynchronous command is running in particular not resubmit
+                 */
                 return;
         }
 
@@ -482,28 +493,27 @@ static void usbduxsub_ai_IsocIrq(struct urb *urb)
         if (likely(this_usbduxsub->ai_counter > 0))
                 return;
 
-        // timer zero, transfer measurements to comedi
+        /* timer zero, transfer measurements to comedi */
         this_usbduxsub->ai_counter = this_usbduxsub->ai_timer;
 
-        // test, if we transmit only a fixed number of samples
+        /* test, if we transmit only a fixed number of samples */
         if (!(this_usbduxsub->ai_continous)) {
-                // not continous, fixed number of samples
+                /* not continous, fixed number of samples */
                 this_usbduxsub->ai_sample_count--;
-                // all samples received?
+                /* all samples received? */
                 if (this_usbduxsub->ai_sample_count < 0) {
-                        // prevent a resubmit next time
+                        /* prevent a resubmit next time */
                         usbdux_ai_stop(this_usbduxsub, 0);
-                        // say comedi that the acquistion is over
+                        /* say comedi that the acquistion is over */
                         s->async->events |= COMEDI_CB_EOA;
                         comedi_event(this_usbduxsub->comedidev, s);
                         return;
                 }
         }
-        // get the data from the USB bus and hand it over
-        // to comedi
+        /* get the data from the USB bus and hand it over to comedi */
         n = s->async->cmd.chanlist_len;
         for (i = 0; i < n; i++) {
-                // transfer data
+                /* transfer data */
                 if (CR_RANGE(s->async->cmd.chanlist[i]) <= 1) {
                         comedi_buf_put
                                 (s->async,
@@ -515,7 +525,7 @@ static void usbduxsub_ai_IsocIrq(struct urb *urb)
                                 le16_to_cpu(this_usbduxsub->inBuffer[i]));
                 }
         }
-        // tell comedi that data is there
+        /* tell comedi that data is there */
         comedi_event(this_usbduxsub->comedidev, s);
 }
 
@@ -572,13 +582,13 @@ static int usbdux_ao_cancel(comedi_device *dev, comedi_subdevice *s)
                 printk("comedi: usbdux_ao_cancel: this_usbduxsub=NULL\n");
                 return -EFAULT;
         }
-        // prevent other CPUs from submitting a command just now
+        /* prevent other CPUs from submitting a command just now */
         down(&this_usbduxsub->sem);
         if (!(this_usbduxsub->probed)) {
                 up(&this_usbduxsub->sem);
                 return -ENODEV;
         }
-        // unlink only if it is really running
+        /* unlink only if it is really running */
         res = usbdux_ao_stop(this_usbduxsub, this_usbduxsub->ao_cmd_running);
         up(&this_usbduxsub->sem);
         return res;
@@ -596,13 +606,13 @@ static void usbduxsub_ao_IsocIrq(struct urb *urb)
                 printk("comedi_: usbdux_: ao urb handler called with NULL ptr.\n");
                 return;
         }
-        // the context variable points to the subdevice
+        /* the context variable points to the subdevice */
         this_comedidev = urb->context;
         if (!this_comedidev) {
                 printk("comedi_: usbdux_: ao urb int-context is a NULL pointer.\n");
                 return;
         }
-        // the private structure of the subdevice is usbduxsub_t
+        /* the private structure of the subdevice is usbduxsub_t */
         this_usbduxsub = this_comedidev->private;
         if (!this_usbduxsub) {
                 printk("comedi_: usbdux_: private data structure of ao subdev is NULL p.\n");
@@ -620,8 +630,8 @@ static void usbduxsub_ao_IsocIrq(struct urb *urb)
         case -ENOENT:
         case -ESHUTDOWN:
         case -ECONNABORTED:
-                // after an unlink command, unplug, ... etc
-                // no unlink needed here. Already shutting down.
+                /* after an unlink command, unplug, ... etc */
+                /* no unlink needed here. Already shutting down. */
                 if (this_usbduxsub->ao_cmd_running) {
                         s->async->events |= COMEDI_CB_EOA;
                         comedi_event(this_usbduxsub->comedidev, s);
@@ -630,42 +640,42 @@ static void usbduxsub_ao_IsocIrq(struct urb *urb)
                 return;
 
         default:
-                // a real error
+                /* a real error */
                 if (this_usbduxsub->ao_cmd_running) {
                         printk("comedi_: usbdux_: Non-zero urb status received in ao intr context: %d\n", urb->status);
                         s->async->events |= COMEDI_CB_ERROR;
                         s->async->events |= COMEDI_CB_EOA;
                         comedi_event(this_usbduxsub->comedidev, s);
-                        // we do an unlink if we are in the high speed mode
+                        /* we do an unlink if we are in the high speed mode */
                         usbdux_ao_stop(this_usbduxsub, 0);
                 }
                 return;
         }
 
-        // are we actually running?
+        /* are we actually running? */
         if (!(this_usbduxsub->ao_cmd_running))
                 return;
 
-        // normal operation: executing a command in this subdevice
+        /* normal operation: executing a command in this subdevice */
         this_usbduxsub->ao_counter--;
         if (this_usbduxsub->ao_counter <= 0) {
-                // timer zero
+                /* timer zero */
                 this_usbduxsub->ao_counter = this_usbduxsub->ao_timer;
 
-                // handle non continous aquisition
+                /* handle non continous aquisition */
                 if (!(this_usbduxsub->ao_continous)) {
-                        // fixed number of samples
+                        /* fixed number of samples */
                         this_usbduxsub->ao_sample_count--;
                         if (this_usbduxsub->ao_sample_count < 0) {
-                                // all samples transmitted
+                                /* all samples transmitted */
                                 usbdux_ao_stop(this_usbduxsub, 0);
                                 s->async->events |= COMEDI_CB_EOA;
                                 comedi_event(this_usbduxsub->comedidev, s);
-                                // no resubmit of the urb
+                                /* no resubmit of the urb */
                                 return;
                         }
                 }
-                // transmit data to the USB bus
+                /* transmit data to the USB bus */
                 ((uint8_t *) (urb->transfer_buffer))[0] =
                         s->async->cmd.chanlist_len;
                 for (i = 0; i < s->async->cmd.chanlist_len; i++) {
@@ -673,21 +683,21 @@ static void usbduxsub_ao_IsocIrq(struct urb *urb)
                         if (i >= NUMOUTCHANNELS)
                                 break;
 
-                        // pointer to the DA
+                        /* pointer to the DA */
                         datap = (&(((int8_t *) urb->transfer_buffer)[i * 3 + 1]));
-                        // get the data from comedi
+                        /* get the data from comedi */
                         ret = comedi_buf_get(s->async, &temp);
                         datap[0] = temp;
                         datap[1] = temp >> 8;
                         datap[2] = this_usbduxsub->dac_commands[i];
-                        // printk("data[0]=%x, data[1]=%x, data[2]=%x\n",
-                        // datap[0],datap[1],datap[2]);
+                        /* printk("data[0]=%x, data[1]=%x, data[2]=%x\n", */
+                        /* datap[0],datap[1],datap[2]); */
                         if (ret < 0) {
                                 printk("comedi: usbdux: buffer underflow\n");
                                 s->async->events |= COMEDI_CB_EOA;
                                 s->async->events |= COMEDI_CB_OVERFLOW;
                         }
-                        // transmit data to comedi
+                        /* transmit data to comedi */
                         s->async->events |= COMEDI_CB_BLOCK;
                         comedi_event(this_usbduxsub->comedidev, s);
                 }
@@ -697,10 +707,10 @@ static void usbduxsub_ao_IsocIrq(struct urb *urb)
         urb->status = 0;
         if (this_usbduxsub->ao_cmd_running) {
                 if (this_usbduxsub->high_speed) {
-                        // uframes
+                        /* uframes */
                         urb->interval = 8;
                 } else {
-                        // frames
+                        /* frames */
                         urb->interval = 1;
                 }
                 urb->number_of_packets = 1;
@@ -718,7 +728,7 @@ static void usbduxsub_ao_IsocIrq(struct urb *urb)
                         s->async->events |= COMEDI_CB_EOA;
                         s->async->events |= COMEDI_CB_ERROR;
                         comedi_event(this_usbduxsub->comedidev, s);
-                        // don't do an unlink here
+                        /* don't do an unlink here */
                         usbdux_ao_stop(this_usbduxsub, 0);
                 }
         }
@@ -730,24 +740,24 @@ static int usbduxsub_start(usbduxsub_t *usbduxsub)
         uint8_t local_transfer_buffer[16];
 
         if (usbduxsub->probed) {
-                // 7f92 to zero
+                /* 7f92 to zero */
                 local_transfer_buffer[0] = 0;
                 errcode = USB_CONTROL_MSG(usbduxsub->usbdev,
-                        // create a pipe for a control transfer
+                        /* create a pipe for a control transfer */
                         usb_sndctrlpipe(usbduxsub->usbdev, 0),
-                        // bRequest, "Firmware"
+                        /* bRequest, "Firmware" */
                         USBDUXSUB_FIRMWARE,
-                        // bmRequestType
+                        /* bmRequestType */
                         VENDOR_DIR_OUT,
-                        // Value
+                        /* Value */
                         USBDUXSUB_CPUCS,
-                        // Index
+                        /* Index */
                         0x0000,
-                        // address of the transfer buffer
+                        /* address of the transfer buffer */
                         local_transfer_buffer,
-                        // Length
+                        /* Length */
                         1,
-                        // Timeout
+                        /* Timeout */
                         EZTIMEOUT);
                 if (errcode < 0) {
                         printk("comedi_: usbdux_: control msg failed (start)\n");
@@ -763,22 +773,22 @@ static int usbduxsub_stop(usbduxsub_t *usbduxsub)
 
         uint8_t local_transfer_buffer[16];
         if (usbduxsub->probed) {
-                // 7f92 to one
+                /* 7f92 to one */
                 local_transfer_buffer[0] = 1;
                 errcode = USB_CONTROL_MSG
                         (usbduxsub->usbdev,
                         usb_sndctrlpipe(usbduxsub->usbdev, 0),
-                        // bRequest, "Firmware"
+                        /* bRequest, "Firmware" */
                         USBDUXSUB_FIRMWARE,
-                        // bmRequestType
+                        /* bmRequestType */
                         VENDOR_DIR_OUT,
-                        // Value
+                        /* Value */
                         USBDUXSUB_CPUCS,
-                        // Index
+                        /* Index */
                         0x0000, local_transfer_buffer,
-                        // Length
+                        /* Length */
                         1,
-                        // Timeout
+                        /* Timeout */
                         EZTIMEOUT);
                 if (errcode < 0) {
                         printk("comedi_: usbdux: control msg failed (stop)\n");
@@ -804,19 +814,19 @@ static int usbduxsub_upload(usbduxsub_t *usbduxsub,
                 errcode = USB_CONTROL_MSG
                         (usbduxsub->usbdev,
                         usb_sndctrlpipe(usbduxsub->usbdev, 0),
-                        // brequest, firmware
+                        /* brequest, firmware */
                         USBDUXSUB_FIRMWARE,
-                        // bmRequestType
+                        /* bmRequestType */
                         VENDOR_DIR_OUT,
-                        // value
+                        /* value */
                         startAddr,
-                        // index
+                        /* index */
                         0x0000,
-                        // our local safe buffer
+                        /* our local safe buffer */
                         local_transfer_buffer,
-                        // length
+                        /* length */
                         len,
-                        // timeout
+                        /* timeout */
                         EZTIMEOUT);
 #ifdef NOISY_DUX_DEBUGBUG
                 printk("comedi_: usbdux: result=%d\n", errcode);
@@ -826,7 +836,7 @@ static int usbduxsub_upload(usbduxsub_t *usbduxsub,
                         return errcode;
                 }
         } else {
-                // no device on the bus for this index
+                /* no device on the bus for this index */
                 return -EFAULT;
         }
         return 0;
@@ -898,7 +908,7 @@ static int usbduxsub_submit_OutURBs(usbduxsub_t *usbduxsub)
 #ifdef NOISY_DUX_DEBUGBUG
                 printk("comedi_: usbdux: submitting out-urb[%d]\n", i);
 #endif
-                // in case of a resubmission after an unlink...
+                /* in case of a resubmission after an unlink... */
                 usbduxsub->urbOut[i]->context = usbduxsub->comedidev;
                 usbduxsub->urbOut[i]->dev = usbduxsub->usbdev;
                 usbduxsub->urbOut[i]->status = 0;
@@ -927,32 +937,32 @@ static int usbdux_ai_cmdtest(comedi_device *dev, comedi_subdevice *s,
         printk("comedi%d: usbdux_ai_cmdtest\n", dev->minor);
 #endif
         /* make sure triggers are valid */
-        // Only immediate triggers are allowed
+        /* Only immediate triggers are allowed */
         tmp = cmd->start_src;
         cmd->start_src &= TRIG_NOW | TRIG_INT;
         if (!cmd->start_src || tmp != cmd->start_src)
                 err++;
 
-        // trigger should happen timed
+        /* trigger should happen timed */
         tmp = cmd->scan_begin_src;
-        // start a new _scan_ with a timer
+        /* start a new _scan_ with a timer */
         cmd->scan_begin_src &= TRIG_TIMER;
         if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
                 err++;
 
-        // scanning is continous
+        /* scanning is continous */
         tmp = cmd->convert_src;
         cmd->convert_src &= TRIG_NOW;
         if (!cmd->convert_src || tmp != cmd->convert_src)
                 err++;
 
-        // issue a trigger when scan is finished and start a new scan
+        /* issue a trigger when scan is finished and start a new scan */
         tmp = cmd->scan_end_src;
         cmd->scan_end_src &= TRIG_COUNT;
         if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
                 err++;
 
-        // trigger at the end of count events or not, stop condition or not
+        /* trigger at the end of count events or not, stop condition or not */
         tmp = cmd->stop_src;
         cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
         if (!cmd->stop_src || tmp != cmd->stop_src)
@@ -990,12 +1000,14 @@ static int usbdux_ai_cmdtest(comedi_device *dev, comedi_subdevice *s,
 
         if (cmd->scan_begin_src == TRIG_TIMER) {
                 if (this_usbduxsub->high_speed) {
-                        // In high speed mode microframes are possible.
-                        // However, during one microframe we can roughly
-                        // sample one channel. Thus, the more channels
-                        // are in the channel list the more time we need.
+                        /*
+                         * In high speed mode microframes are possible.
+                         * However, during one microframe we can roughly
+                         * sample one channel. Thus, the more channels
+                         * are in the channel list the more time we need.
+                         */
                         i = 1;
-                        // find a power of 2 for the number of channels
+                        /* find a power of 2 for the number of channels */
                         while (i < (cmd->chanlist_len)) {
                                 i = i * 2;
                         }
@@ -1003,7 +1015,8 @@ static int usbdux_ai_cmdtest(comedi_device *dev, comedi_subdevice *s,
                                 cmd->scan_begin_arg = 1000000 / 8 * i;
                                 err++;
                         }
-                        // now calc the real sampling rate with all the rounding errors
+                        /* now calc the real sampling rate with all the
+                         * rounding errors */
                         tmpTimer =
                                 ((unsigned int)(cmd->scan_begin_arg / 125000)) *
                                 125000;
@@ -1011,13 +1024,14 @@ static int usbdux_ai_cmdtest(comedi_device *dev, comedi_subdevice *s,
                                 cmd->scan_begin_arg = tmpTimer;
                                 err++;
                         }
-                } else {        // full speed
-                        // 1kHz scans every USB frame
+                } else {
+                        /* full speed */
+                        /* 1kHz scans every USB frame */
                         if (cmd->scan_begin_arg < 1000000) {
                                 cmd->scan_begin_arg = 1000000;
                                 err++;
                         }
-                        // calc the real sampling rate with the rounding errors
+                        /* calc the real sampling rate with the rounding errors */
                         tmpTimer =
                                 ((unsigned int)(cmd->scan_begin_arg /
                                         1000000)) * 1000000;
@@ -1027,7 +1041,7 @@ static int usbdux_ai_cmdtest(comedi_device *dev, comedi_subdevice *s,
                         }
                 }
         }
-        // the same argument
+        /* the same argument */
         if (cmd->scan_end_arg != cmd->chanlist_len) {
                 cmd->scan_end_arg = cmd->chanlist_len;
                 err++;
@@ -1049,8 +1063,10 @@ static int usbdux_ai_cmdtest(comedi_device *dev, comedi_subdevice *s,
         return 0;
 }
 
-// creates the ADC command for the MAX1271
-// range is the range value from comedi
+/*
+ * creates the ADC command for the MAX1271
+ * range is the range value from comedi
+ */
 static int8_t create_adc_command(unsigned int chan, int range)
 {
         int8_t p = (range <= 1);
@@ -1058,7 +1074,7 @@ static int8_t create_adc_command(unsigned int chan, int range)
         return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3);
 }
 
-// bulk transfers to usbdux
+/* bulk transfers to usbdux */
 
 #define SENDADCOMMANDS            0
 #define SENDDACOMMANDS            1
@@ -1112,7 +1128,7 @@ static int receive_dux_commands(usbduxsub_t *this_usbduxsub, int command)
                         return result;
                 }
         }
-        // this is only reached if the data has been requested a couple of times
+        /* this is only reached if the data has been requested a couple of times */
         printk("comedi%d: insn: wrong data returned from firmware: want cmd %d, got cmd %d.\n", this_usbduxsub->comedidev->minor, command, le16_to_cpu(this_usbduxsub->insnBuffer[0]));
         return -EFAULT;
 }
@@ -1235,30 +1251,30 @@ static int usbdux_ai_cmd(comedi_device *dev, comedi_subdevice *s)
         this_usbduxsub->ai_counter = this_usbduxsub->ai_timer;
 
         if (cmd->stop_src == TRIG_COUNT) {
-                // data arrives as one packet
+                /* data arrives as one packet */
                 this_usbduxsub->ai_sample_count = cmd->stop_arg;
                 this_usbduxsub->ai_continous = 0;
         } else {
-                // continous aquisition
+                /* continous aquisition */
                 this_usbduxsub->ai_continous = 1;
                 this_usbduxsub->ai_sample_count = 0;
         }
 
         if (cmd->start_src == TRIG_NOW) {
-                // enable this acquisition operation
+                /* enable this acquisition operation */
                 this_usbduxsub->ai_cmd_running = 1;
                 ret = usbduxsub_submit_InURBs(this_usbduxsub);
                 if (ret < 0) {
                         this_usbduxsub->ai_cmd_running = 0;
-                        // fixme: unlink here??
+                        /* fixme: unlink here?? */
                         up(&this_usbduxsub->sem);
                         return ret;
                 }
                 s->async->inttrig = NULL;
         } else {
                 /* TRIG_INT */
-                // don't enable the acquision operation
-                // wait for an internal signal
+                /* don't enable the acquision operation */
+                /* wait for an internal signal */
                 s->async->inttrig = usbdux_ai_inttrig;
         }
         up(&this_usbduxsub->sem);
@@ -1294,13 +1310,13 @@ static int usbdux_ai_insn_read(comedi_device *dev, comedi_subdevice *s,
                 return 0;
         }
 
-        // sample one channel
+        /* sample one channel */
         chan = CR_CHAN(insn->chanspec);
         range = CR_RANGE(insn->chanspec);
-        // set command for the first channel
+        /* set command for the first channel */
         this_usbduxsub->dux_commands[1] = create_adc_command(chan, range);
 
-        // adc commands
+        /* adc commands */
         if ((err = send_dux_commands(this_usbduxsub, SENDSINGLEAD)) < 0) {
                 up(&this_usbduxsub->sem);
                 return err;
@@ -1322,8 +1338,8 @@ static int usbdux_ai_insn_read(comedi_device *dev, comedi_subdevice *s,
         return i;
 }
 
-//////////////////
-// analog out
+/************************************/
+/* analog out */
 
 static int usbdux_ao_insn_read(comedi_device *dev, comedi_subdevice *s,
                                comedi_insn *insn, lsampl_t *data)
@@ -1376,13 +1392,13 @@ static int usbdux_ao_insn_write(comedi_device *dev, comedi_subdevice *s,
                 printk("comedi%d: ao_insn_write: data[chan=%d,i=%d]=%d\n",
                         dev->minor, chan, i, data[i]);
 #endif
-                // number of channels: 1
+                /* number of channels: 1 */
                 this_usbduxsub->dux_commands[1] = 1;
-                // one 16 bit value
+                /* one 16 bit value */
                 *((int16_t *) (this_usbduxsub->dux_commands + 2)) =
                         cpu_to_le16(data[i]);
                 this_usbduxsub->outBuffer[chan] = data[i];
-                // channel number
+                /* channel number */
                 this_usbduxsub->dux_commands[4] = (chan << 6);
                 if ((err = send_dux_commands(this_usbduxsub,
                                         SENDDACOMMANDS)) < 0) {
@@ -1448,47 +1464,47 @@ static int usbdux_ao_cmdtest(comedi_device *dev, comedi_subdevice *s,
         printk("comedi%d: usbdux_ao_cmdtest\n", dev->minor);
 #endif
         /* make sure triggers are valid */
-        // Only immediate triggers are allowed
+        /* Only immediate triggers are allowed */
         tmp = cmd->start_src;
         cmd->start_src &= TRIG_NOW | TRIG_INT;
         if (!cmd->start_src || tmp != cmd->start_src)
                 err++;
 
-        // trigger should happen timed
+        /* trigger should happen timed */
         tmp = cmd->scan_begin_src;
-        // just now we scan also in the high speed mode every frame
-        // this is due to ehci driver limitations
+        /* just now we scan also in the high speed mode every frame */
+        /* this is due to ehci driver limitations */
         if (0) {                /* (this_usbduxsub->high_speed) */
-                // start immidiately a new scan
-                // the sampling rate is set by the coversion rate
+                /* start immidiately a new scan */
+                /* the sampling rate is set by the coversion rate */
                 cmd->scan_begin_src &= TRIG_FOLLOW;
         } else {
-                // start a new scan (output at once) with a timer
+                /* start a new scan (output at once) with a timer */
                 cmd->scan_begin_src &= TRIG_TIMER;
         }
         if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
                 err++;
 
-        // scanning is continous
+        /* scanning is continous */
         tmp = cmd->convert_src;
-        // we always output at 1kHz just now all channels at once
+        /* we always output at 1kHz just now all channels at once */
         if (0) {                /* (this_usbduxsub->high_speed) */
-                // in usb-2.0 only one conversion it tranmitted but with 8kHz/n
+                /* in usb-2.0 only one conversion it tranmitted but with 8kHz/n */
                 cmd->convert_src &= TRIG_TIMER;
         } else {
-                // all conversion events happen simultaneously with a rate of 1kHz/n
+                /* all conversion events happen simultaneously with a rate of 1kHz/n */
                 cmd->convert_src &= TRIG_NOW;
         }
         if (!cmd->convert_src || tmp != cmd->convert_src)
                 err++;
 
-        // issue a trigger when scan is finished and start a new scan
+        /* issue a trigger when scan is finished and start a new scan */
         tmp = cmd->scan_end_src;
         cmd->scan_end_src &= TRIG_COUNT;
         if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
                 err++;
 
-        // trigger at the end of count events or not, stop condition or not
+        /* trigger at the end of count events or not, stop condition or not */
         tmp = cmd->stop_src;
         cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
         if (!cmd->stop_src || tmp != cmd->stop_src)
@@ -1531,7 +1547,7 @@ static int usbdux_ao_cmdtest(comedi_device *dev, comedi_subdevice *s,
                         err++;
                 }
         }
-        // not used now, is for later use
+        /* not used now, is for later use */
         if (cmd->convert_src == TRIG_TIMER) {
                 if (cmd->convert_arg < 125000) {
                         cmd->convert_arg = 125000;
@@ -1539,7 +1555,7 @@ static int usbdux_ao_cmdtest(comedi_device *dev, comedi_subdevice *s,
                 }
         }
 
-        // the same argument
+        /* the same argument */
         if (cmd->scan_end_arg != cmd->chanlist_len) {
                 cmd->scan_end_arg = cmd->chanlist_len;
                 err++;
@@ -1584,7 +1600,7 @@ static int usbdux_ao_cmd(comedi_device *dev, comedi_subdevice *s)
         printk("comedi%d: usbdux_ao_cmd\n", dev->minor);
 #endif
 
-        // set current channel of the running aquisition to zero
+        /* set current channel of the running aquisition to zero */
         s->async->cur_chan = 0;
         for (i = 0; i < cmd->chanlist_len; ++i) {
                 chan = CR_CHAN(cmd->chanlist[i]);
@@ -1600,15 +1616,15 @@ static int usbdux_ao_cmd(comedi_device *dev, comedi_subdevice *s)
 #endif
         }
 
-        // we count in steps of 1ms (125us)
-        // 125us mode not used yet
+        /* we count in steps of 1ms (125us) */
+        /* 125us mode not used yet */
         if (0) {                /* (this_usbduxsub->high_speed) */
-                // 125us
-                // timing of the conversion itself: every 125 us
+                /* 125us */
+                /* timing of the conversion itself: every 125 us */
                 this_usbduxsub->ao_timer = cmd->convert_arg / 125000;
         } else {
-                // 1ms
-                // timing of the scan: we get all channels at once
+                /* 1ms */
+                /* timing of the scan: we get all channels at once */
                 this_usbduxsub->ao_timer = cmd->scan_begin_arg / 1000000;
 #ifdef NOISY_DUX_DEBUGBUG
                 printk("comedi%d: usbdux: scan_begin_src=%d, scan_begin_arg=%d, convert_src=%d, convert_arg=%d\n", dev->minor, cmd->scan_begin_src, cmd->scan_begin_arg, cmd->convert_src, cmd->convert_arg);
@@ -1624,40 +1640,40 @@ static int usbdux_ao_cmd(comedi_device *dev, comedi_subdevice *s)
         this_usbduxsub->ao_counter = this_usbduxsub->ao_timer;
 
         if (cmd->stop_src == TRIG_COUNT) {
-                // not continous
-                // counter
-                // high speed also scans everything at once
+                /* not continous */
+                /* counter */
+                /* high speed also scans everything at once */
                 if (0) {        /* (this_usbduxsub->high_speed) */
                         this_usbduxsub->ao_sample_count =
                                 (cmd->stop_arg) * (cmd->scan_end_arg);
                 } else {
-                        // there's no scan as the scan has been
-                        // perf inside the FX2
-                        // data arrives as one packet
+                        /* there's no scan as the scan has been */
+                        /* perf inside the FX2 */
+                        /* data arrives as one packet */
                         this_usbduxsub->ao_sample_count = cmd->stop_arg;
                 }
                 this_usbduxsub->ao_continous = 0;
         } else {
-                // continous aquisition
+                /* continous aquisition */
                 this_usbduxsub->ao_continous = 1;
                 this_usbduxsub->ao_sample_count = 0;
         }
 
         if (cmd->start_src == TRIG_NOW) {
-                // enable this acquisition operation
+                /* enable this acquisition operation */
                 this_usbduxsub->ao_cmd_running = 1;
                 ret = usbduxsub_submit_OutURBs(this_usbduxsub);
                 if (ret < 0) {
                         this_usbduxsub->ao_cmd_running = 0;
-                        // fixme: unlink here??
+                        /* fixme: unlink here?? */
                         up(&this_usbduxsub->sem);
                         return ret;
                 }
                 s->async->inttrig = NULL;
         } else {
                 /* TRIG_INT */
-                // submit the urbs later
-                // wait for an internal signal
+                /* submit the urbs later */
+                /* wait for an internal signal */
                 s->async->inttrig = usbdux_ao_inttrig;
         }
 
@@ -1691,8 +1707,8 @@ static int usbdux_dio_insn_config(comedi_device *dev, comedi_subdevice *s,
                 return -EINVAL;
                 break;
         }
-        // we don't tell the firmware here as it would take 8 frames
-        // to submit the information. We do it in the insn_bits.
+        /* we don't tell the firmware here as it would take 8 frames */
+        /* to submit the information. We do it in the insn_bits. */
         return insn->n;
 }
 
@@ -1724,8 +1740,8 @@ static int usbdux_dio_insn_bits(comedi_device *dev, comedi_subdevice *s,
         this_usbduxsub->dux_commands[1] = s->io_bits;
         this_usbduxsub->dux_commands[2] = s->state;
 
-        // This command also tells the firmware to return
-        // the digital input lines
+        /* This command also tells the firmware to return */
+        /* the digital input lines */
         if ((err = send_dux_commands(this_usbduxsub, SENDDIOBITSCOMMAND)) < 0) {
                 up(&this_usbduxsub->sem);
                 return err;
@@ -1807,12 +1823,12 @@ static int usbdux_counter_write(comedi_device *dev, comedi_subdevice *s,
 static int usbdux_counter_config(comedi_device *dev, comedi_subdevice *s,
                                  comedi_insn *insn, lsampl_t *data)
 {
-        // nothing to do so far
+        /* nothing to do so far */
         return 2;
 }
 
-/////////////////////////////
-// PWM
+/***********************************/
+/* PWM */
 
 static int usbduxsub_unlink_PwmURBs(usbduxsub_t *usbduxsub_tmp)
 {
@@ -1879,19 +1895,19 @@ static void usbduxsub_pwm_irq(struct urb *urb)
         comedi_device *this_comedidev;
         comedi_subdevice *s;
 
-        // printk("PWM: IRQ\n");
+        /* printk("PWM: IRQ\n"); */
 
         if (!urb) {
                 printk("comedi_: usbdux_: pwm urb handler called with NULL ptr.\n");
                 return;
         }
-        // the context variable points to the subdevice
+        /* the context variable points to the subdevice */
         this_comedidev = urb->context;
         if (!this_comedidev) {
                 printk("comedi_: usbdux_: pwm urb int-context is a NULL pointer.\n");
                 return;
         }
-        // the private structure of the subdevice is usbduxsub_t
+        /* the private structure of the subdevice is usbduxsub_t */
         this_usbduxsub = this_comedidev->private;
         if (!this_usbduxsub) {
                 printk("comedi_: usbdux_: private data structure of pwm subdev is NULL p.\n");
@@ -1959,7 +1975,7 @@ static int usbduxsub_submit_PwmURBs(usbduxsub_t *usbduxsub)
 #ifdef NOISY_DUX_DEBUGBUG
         printk("comedi_: usbdux: submitting pwm-urb\n");
 #endif
-        // in case of a resubmission after an unlink...
+        /* in case of a resubmission after an unlink... */
 
         usb_fill_bulk_urb(usbduxsub->urbPwm,
                 usbduxsub->usbdev,
@@ -2003,7 +2019,7 @@ static int usbdux_pwm_period(comedi_device *dev, comedi_subdevice *s,
 }
 
 
-// is called from insn so there's no need to do all the sanity checks
+/* is called from insn so there's no need to do all the sanity checks */
 static int usbdux_pwm_start(comedi_device * dev, comedi_subdevice * s)
 {
         int ret, i;
@@ -2013,7 +2029,7 @@ static int usbdux_pwm_start(comedi_device * dev, comedi_subdevice * s)
         printk("comedi%d: usbdux_pwm_start\n", dev->minor);
 #endif
         if (this_usbduxsub->pwm_cmd_running) {
-                // already running
+                /* already running */
                 return 0;
         }
 
@@ -2021,7 +2037,7 @@ static int usbdux_pwm_start(comedi_device * dev, comedi_subdevice * s)
         if ((ret = send_dux_commands(this_usbduxsub, SENDPWMON)) < 0) {
                 return ret;
         }
-        // initalise the buffer
+        /* initalise the buffer */
         for (i = 0; i < this_usbduxsub->sizePwmBuf; i++) {
                 ((char *)(this_usbduxsub->urbPwm->transfer_buffer))[i] = 0;
         }
@@ -2036,7 +2052,7 @@ static int usbdux_pwm_start(comedi_device * dev, comedi_subdevice * s)
 }
 
 
-// generates the bit pattern for PWM with the optional sign bit
+/* generates the bit pattern for PWM with the optional sign bit */
 static int usbdux_pwm_pattern(comedi_device * dev, comedi_subdevice * s,
                               int channel, lsampl_t value, lsampl_t sign)
 {
@@ -2048,27 +2064,27 @@ static int usbdux_pwm_pattern(comedi_device * dev, comedi_subdevice * s,
         if (!this_usbduxsub) {
                 return -EFAULT;
         }
-        // this is the DIO bit which carries the PWM data
+        /* this is the DIO bit which carries the PWM data */
         pwm_mask = (1 << channel);
-        // this is the DIO bit which carries the optional direction bit
+        /* this is the DIO bit which carries the optional direction bit */
         sgn_mask = (16 << channel);
-        // this is the buffer which will be filled with the with bit
-        // pattern for one period
+        /* this is the buffer which will be filled with the with bit */
+        /* pattern for one period */
         szbuf = this_usbduxsub->sizePwmBuf;
         pBuf = (char *)(this_usbduxsub->urbPwm->transfer_buffer);
         for (i = 0; i < szbuf; i++) {
                 c = *pBuf;
-                // reset bits
+                /* reset bits */
                 c = c & (~pwm_mask);
-                // set the bit as long as the index is lower than the value
+                /* set the bit as long as the index is lower than the value */
                 if (i < value)
                         c = c | pwm_mask;
-                // set the optional sign bit for a relay
+                /* set the optional sign bit for a relay */
                 if (!sign) {
-                        // positive value
+                        /* positive value */
                         c = c & (~sgn_mask);
                 } else {
-                        // negative value
+                        /* negative value */
                         c = c | sgn_mask;
                 }
                 *(pBuf++) = c;
@@ -2086,14 +2102,14 @@ static int usbdux_pwm_write(comedi_device * dev, comedi_subdevice * s,
         }
 
         if ((insn->n)!=1) {
-                // doesn't make sense to have more than one value here
-                // because it would just overwrite the PWM buffer a couple of times
+                /* doesn't make sense to have more than one value here */
+                /* because it would just overwrite the PWM buffer a couple of times */
                 return -EINVAL;
         }
 
-        // the sign is set via a special INSN only, this gives us 8 bits for
-        // normal operation
-        // relay sign 0 by default
+        /* the sign is set via a special INSN only, this gives us 8 bits for */
+        /* normal operation */
+        /* relay sign 0 by default */
         return usbdux_pwm_pattern(dev, s, CR_CHAN(insn->chanspec),
                                   data[0], 0);
 }
@@ -2290,7 +2306,7 @@ static int read_firmware(usbduxsub_t *usbduxsub, void *firmwarePtr, long size)
                 int idx, off;
                 int j = 0;
 
-                // get one line
+                /* get one line */
                 while ((i < size) && (fp[i] != 13) && (fp[i] != 10)) {
                         buf[j] = fp[i];
                         i++;
@@ -2300,14 +2316,14 @@ static int read_firmware(usbduxsub_t *usbduxsub, void *firmwarePtr, long size)
                                 return -1;
                         }
                 }
-                // get rid of LF/CR/...
+                /* get rid of LF/CR/... */
                 while ((i < size) && ((fp[i] == 13) || (fp[i] == 10)
                                 || (fp[i] == 0))) {
                         i++;
                 }
 
                 buf[j] = 0;
-                //printk("comedi_: buf=%s\n",buf);
+                /*printk("comedi_: buf=%s\n",buf); */
 
                 /* EXTENSION: "# comment-till-end-of-line", for copyrights etc */
                 if (buf[0] == '#')
@@ -2332,7 +2348,7 @@ static int read_firmware(usbduxsub_t *usbduxsub, void *firmwarePtr, long size)
                         printk("comedi_: usbdux: firmware upload goes beyond FX2 RAM boundaries.");
                         return -EFAULT;
                 }
-                //printk("comedi_: usbdux: off=%x, len=%x:",off,len);
+                /*printk("comedi_: usbdux: off=%x, len=%x:",off,len); */
 
                 /* Read the record type */
                 type = hex2unsigned(buf + 7);
@@ -2350,9 +2366,9 @@ static int read_firmware(usbduxsub_t *usbduxsub, void *firmwarePtr, long size)
 
                 for (idx = 0, cp = buf + 9; idx < len; idx += 1, cp += 2) {
                         firmwareBinary[idx + off] = hex2unsigned(cp);
-                        //printk("%02x ",firmwareBinary[idx+off]);
+                        /*printk("%02x ",firmwareBinary[idx+off]); */
                 }
-                //printk("\n");
+                /*printk("\n"); */
 
                 if (i >= size) {
                         printk("comedi_: usbdux: unexpected end of hex file\n");
@@ -2365,7 +2381,7 @@ static int read_firmware(usbduxsub_t *usbduxsub, void *firmwarePtr, long size)
         return res;
 }
 
-// allocate memory for the urbs and initialise them
+/* allocate memory for the urbs and initialise them */
 static int usbduxsub_probe(struct usb_interface *uinterf,
         const struct usb_device_id *id)
 {
@@ -2377,7 +2393,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
         printk("comedi_: usbdux_: finding a free structure for the usb-device\n");
 #endif
         down(&start_stop_sem);
-        // look for a free place in the usbdux array
+        /* look for a free place in the usbdux array */
         index = -1;
         for (i = 0; i < NUMUSBDUX; i++) {
                 if (!(usbduxsub[i].probed)) {
@@ -2386,7 +2402,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 }
         }
 
-        // no more space
+        /* no more space */
         if (index == -1) {
                 printk("Too many usbdux-devices connected.\n");
                 up(&start_stop_sem);
@@ -2397,25 +2413,25 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
 #endif
 
         init_MUTEX(&(usbduxsub[index].sem));
-        // save a pointer to the usb device
+        /* save a pointer to the usb device */
         usbduxsub[index].usbdev = udev;
 
-        // 2.6: save the interface itself
+        /* 2.6: save the interface itself */
         usbduxsub[index].interface = uinterf;
-        // get the interface number from the interface
+        /* get the interface number from the interface */
         usbduxsub[index].ifnum = uinterf->altsetting->desc.bInterfaceNumber;
-        // hand the private data over to the usb subsystem
-        // will be needed for disconnect
+        /* hand the private data over to the usb subsystem */
+        /* will be needed for disconnect */
         usb_set_intfdata(uinterf, &(usbduxsub[index]));
 
 #ifdef CONFIG_COMEDI_DEBUG
         printk("comedi_: usbdux: ifnum=%d\n", usbduxsub[index].ifnum);
 #endif
-        // test if it is high speed (USB 2.0)
+        /* test if it is high speed (USB 2.0) */
         usbduxsub[index].high_speed =
                 (usbduxsub[index].usbdev->speed == USB_SPEED_HIGH);
 
-        // create space for the commands of the DA converter
+        /* create space for the commands of the DA converter */
         usbduxsub[index].dac_commands = kzalloc(NUMOUTCHANNELS, GFP_KERNEL);
         if (!usbduxsub[index].dac_commands) {
                 printk("comedi_: usbdux: error alloc space for dac commands\n");
@@ -2423,7 +2439,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 up(&start_stop_sem);
                 return PROBE_ERR_RETURN(-ENOMEM);
         }
-        // create space for the commands going to the usb device
+        /* create space for the commands going to the usb device */
         usbduxsub[index].dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
         if (!usbduxsub[index].dux_commands) {
                 printk("comedi_: usbdux: error alloc space for dac commands\n");
@@ -2431,7 +2447,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 up(&start_stop_sem);
                 return PROBE_ERR_RETURN(-ENOMEM);
         }
-        // create space for the in buffer and set it to zero
+        /* create space for the in buffer and set it to zero */
         usbduxsub[index].inBuffer = kzalloc(SIZEINBUF, GFP_KERNEL);
         if (!(usbduxsub[index].inBuffer)) {
                 printk("comedi_: usbdux: could not alloc space for inBuffer\n");
@@ -2439,7 +2455,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 up(&start_stop_sem);
                 return PROBE_ERR_RETURN(-ENOMEM);
         }
-        // create space of the instruction buffer
+        /* create space of the instruction buffer */
         usbduxsub[index].insnBuffer = kzalloc(SIZEINSNBUF, GFP_KERNEL);
         if (!(usbduxsub[index].insnBuffer)) {
                 printk("comedi_: usbdux: could not alloc space for insnBuffer\n");
@@ -2447,7 +2463,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 up(&start_stop_sem);
                 return PROBE_ERR_RETURN(-ENOMEM);
         }
-        // create space for the outbuffer
+        /* create space for the outbuffer */
         usbduxsub[index].outBuffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
         if (!(usbduxsub[index].outBuffer)) {
                 printk("comedi_: usbdux: could not alloc space for outBuffer\n");
@@ -2479,7 +2495,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 return PROBE_ERR_RETURN(-ENOMEM);
         }
         for (i = 0; i < usbduxsub[index].numOfInBuffers; i++) {
-                // one frame: 1ms
+                /* one frame: 1ms */
                 usbduxsub[index].urbIn[i] = USB_ALLOC_URB(1);
                 if (usbduxsub[index].urbIn[i] == NULL) {
                         printk("comedi_: usbdux%d: Could not alloc. urb(%d)\n",
@@ -2489,8 +2505,8 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                         return PROBE_ERR_RETURN(-ENOMEM);
                 }
                 usbduxsub[index].urbIn[i]->dev = usbduxsub[index].usbdev;
-                // will be filled later with a pointer to the comedi-device
-                // and ONLY then the urb should be submitted
+                /* will be filled later with a pointer to the comedi-device */
+                /* and ONLY then the urb should be submitted */
                 usbduxsub[index].urbIn[i]->context = NULL;
                 usbduxsub[index].urbIn[i]->pipe =
                         usb_rcvisocpipe(usbduxsub[index].usbdev, ISOINEP);
@@ -2527,7 +2543,7 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 return PROBE_ERR_RETURN(-ENOMEM);
         }
         for (i = 0; i < usbduxsub[index].numOfOutBuffers; i++) {
-                // one frame: 1ms
+                /* one frame: 1ms */
                 usbduxsub[index].urbOut[i] = USB_ALLOC_URB(1);
                 if (usbduxsub[index].urbOut[i] == NULL) {
                         printk("comedi_: usbdux%d: Could not alloc. urb(%d)\n",
@@ -2537,8 +2553,8 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                         return PROBE_ERR_RETURN(-ENOMEM);
                 }
                 usbduxsub[index].urbOut[i]->dev = usbduxsub[index].usbdev;
-                // will be filled later with a pointer to the comedi-device
-                // and ONLY then the urb should be submitted
+                /* will be filled later with a pointer to the comedi-device */
+                /* and ONLY then the urb should be submitted */
                 usbduxsub[index].urbOut[i]->context = NULL;
                 usbduxsub[index].urbOut[i]->pipe =
                         usb_sndisocpipe(usbduxsub[index].usbdev, ISOOUTEP);
@@ -2559,17 +2575,17 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
                 usbduxsub[index].urbOut[i]->iso_frame_desc[0].length =
                         SIZEOUTBUF;
                 if (usbduxsub[index].high_speed) {
-                        // uframes
+                        /* uframes */
                         usbduxsub[index].urbOut[i]->interval = 8;
                 } else {
-                        // frames
+                        /* frames */
                         usbduxsub[index].urbOut[i]->interval = 1;
                 }
         }
 
-        // pwm
+        /* pwm */
         if (usbduxsub[index].high_speed) {
-                usbduxsub[index].sizePwmBuf = 512;      // max bulk ep size in high speed
+                usbduxsub[index].sizePwmBuf = 512;      /* max bulk ep size in high speed */
                 usbduxsub[index].urbPwm = USB_ALLOC_URB(0);
                 if (usbduxsub[index].urbPwm == NULL) {
                         printk("comedi_: usbdux%d: Could not alloc. pwm urb\n",
@@ -2595,11 +2611,11 @@ static int usbduxsub_probe(struct usb_interface *uinterf,
         usbduxsub[index].ao_cmd_running = 0;
         usbduxsub[index].pwm_cmd_running = 0;
 
-        // we've reached the bottom of the function
+        /* we've reached the bottom of the function */
         usbduxsub[index].probed = 1;
         up(&start_stop_sem);
         printk("comedi_: usbdux%d has been successfully initialised.\n", index);
-        // success
+        /* success */
         return 0;
 }
 
@@ -2636,7 +2652,7 @@ static int usbdux_attach(comedi_device *dev, comedi_devconfig *it)
         dev->private = NULL;
 
         down(&start_stop_sem);
-        // find a valid device which has been detected by the probe function of the usb
+        /* find a valid device which has been detected by the probe function of the usb */
         index = -1;
         for (i = 0; i < NUMUSBDUX; i++) {
                 if ((usbduxsub[i].probed) && (!usbduxsub[i].attached)) {
@@ -2652,10 +2668,10 @@ static int usbdux_attach(comedi_device *dev, comedi_devconfig *it)
         }
 
         down(&(usbduxsub[index].sem));
-        // pointer back to the corresponding comedi device
+        /* pointer back to the corresponding comedi device */
         usbduxsub[index].comedidev = dev;
 
-        // trying to upload the firmware into the chip
+        /* trying to upload the firmware into the chip */
         if (comedi_aux_data(it->options, 0) &&
                 it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) {
                 read_firmware(usbduxsub + index,
@@ -2667,14 +2683,14 @@ static int usbdux_attach(comedi_device *dev, comedi_devconfig *it)
 
         /* set number of subdevices */
         if (usbduxsub[index].high_speed) {
-                // with pwm
+                /* with pwm */
                 dev->n_subdevices = 5;
         } else {
-                // without pwm
+                /* without pwm */
                 dev->n_subdevices = 4;
         }
 
-        // allocate space for the subdevices
+        /* allocate space for the subdevices */
         if ((ret = alloc_subdevices(dev, dev->n_subdevices)) < 0) {
                 printk("comedi%d: usbdux: error alloc space for subdev\n",
                         dev->minor);
@@ -2684,64 +2700,63 @@ static int usbdux_attach(comedi_device *dev, comedi_devconfig *it)
 
         printk("comedi%d: usbdux: usb-device %d is attached to comedi.\n",
                 dev->minor, index);
-        // private structure is also simply the usb-structure
+        /* private structure is also simply the usb-structure */
         dev->private = usbduxsub + index;
 
-        // the first subdevice is the A/D converter
+        /* the first subdevice is the A/D converter */
         s = dev->subdevices + SUBDEV_AD;
-        // the URBs get the comedi subdevice
-        // which is responsible for reading
-        // this is the subdevice which reads data
+        /* the URBs get the comedi subdevice */
+        /* which is responsible for reading */
+        /* this is the subdevice which reads data */
         dev->read_subdev = s;
-        // the subdevice receives as private structure the
-        // usb-structure
+        /* the subdevice receives as private structure the */
+        /* usb-structure */
         s->private = NULL;
-        // analog input
+        /* analog input */
         s->type = COMEDI_SUBD_AI;
-        // readable and ref is to ground
+        /* readable and ref is to ground */
         s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
-        // 8 channels
+        /* 8 channels */
         s->n_chan = 8;
-        // length of the channellist
+        /* length of the channellist */
         s->len_chanlist = 8;
-        // callback functions
+        /* callback functions */
         s->insn_read = usbdux_ai_insn_read;
         s->do_cmdtest = usbdux_ai_cmdtest;
         s->do_cmd = usbdux_ai_cmd;
         s->cancel = usbdux_ai_cancel;
-        // max value from the A/D converter (12bit)
+        /* max value from the A/D converter (12bit) */
         s->maxdata = 0xfff;
-        // range table to convert to physical units
+        /* range table to convert to physical units */
         s->range_table = (&range_usbdux_ai_range);
-        //
 
-        // analog out
+        /* analog out */
         s = dev->subdevices + SUBDEV_DA;
-        // analog out
+        /* analog out */
         s->type = COMEDI_SUBD_AO;
-        // backward pointer
+        /* backward pointer */
         dev->write_subdev = s;
-        // the subdevice receives as private structure the
-        // usb-structure
+        /* the subdevice receives as private structure the */
+        /* usb-structure */
         s->private = NULL;
-        // are writable
+        /* are writable */
         s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
-        // 4 channels
+        /* 4 channels */
         s->n_chan = 4;
-        // length of the channellist
+        /* length of the channellist */
         s->len_chanlist = 4;
-        // 12 bit resolution
+        /* 12 bit resolution */
         s->maxdata = 0x0fff;
-        // bipolar range
+        /* bipolar range */
         s->range_table = (&range_usbdux_ao_range);
-        // callback
+        /* callback */
         s->do_cmdtest = usbdux_ao_cmdtest;
         s->do_cmd = usbdux_ao_cmd;
         s->cancel = usbdux_ao_cancel;
         s->insn_read = usbdux_ao_insn_read;
         s->insn_write = usbdux_ao_insn_write;
 
-        // digital I/O
+        /* digital I/O */
         s = dev->subdevices + SUBDEV_DIO;
         s->type = COMEDI_SUBD_DIO;
         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
@@ -2750,10 +2765,10 @@ static int usbdux_attach(comedi_device *dev, comedi_devconfig *it)
         s->range_table = (&range_digital);
         s->insn_bits = usbdux_dio_insn_bits;
         s->insn_config = usbdux_dio_insn_config;
-        // we don't use it
+        /* we don't use it */
         s->private = NULL;
 
-        //counter
+        /* counter */
         s = dev->subdevices + SUBDEV_COUNTER;
         s->type = COMEDI_SUBD_COUNTER;
         s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
@@ -2764,19 +2779,19 @@ static int usbdux_attach(comedi_device *dev, comedi_devconfig *it)
         s->insn_config = usbdux_counter_config;
 
         if (usbduxsub[index].high_speed) {
-                //timer / pwm
+                /* timer / pwm */
                 s = dev->subdevices + SUBDEV_PWM;
                 s->type = COMEDI_SUBD_PWM;
                 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
                 s->n_chan = 8;
-                // this defines the max duty cycle resolution
+                /* this defines the max duty cycle resolution */
                 s->maxdata = usbduxsub[index].sizePwmBuf;
                 s->insn_write = usbdux_pwm_write;
                 s->insn_read = usbdux_pwm_read;
                 s->insn_config = usbdux_pwm_config;
                 usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
         }
-        // finally decide that it's attached
+        /* finally decide that it's attached */
         usbduxsub[index].attached = 1;
 
         up(&(usbduxsub[index].sem));
@@ -2808,8 +2823,8 @@ static int usbdux_detach(comedi_device *dev)
         }
 
         down(&usbduxsub_tmp->sem);
-        // Don't allow detach to free the private structure
-        // It's one entry of of usbduxsub[]
+        /* Don't allow detach to free the private structure */
+        /* It's one entry of of usbduxsub[] */
         dev->private = NULL;
         usbduxsub_tmp->attached = 0;
         usbduxsub_tmp->comedidev = NULL;
@@ -2834,9 +2849,9 @@ static void init_usb_devices(void)
 #ifdef CONFIG_COMEDI_DEBUG
         printk("comedi_: usbdux: setting all possible devs to invalid\n");
 #endif
-        // all devices entries are invalid to begin with
-        // they will become valid by the probe function
-        // and then finally by the attach-function
+        /* all devices entries are invalid to begin with */
+        /* they will become valid by the probe function */
+        /* and then finally by the attach-function */
         for (index = 0; index < NUMUSBDUX; index++) {
                 memset(&(usbduxsub[index]), 0x00, sizeof(usbduxsub[index]));
                 init_MUTEX(&(usbduxsub[index].sem));
@@ -2860,9 +2875,9 @@ static struct usb_driver usbduxsub_driver = {
       .id_table =       usbduxsub_table,
 };
 
-// Can't use the nice macro as I have also to initialise the USB
-// subsystem:
-// registering the usb-system _and_ the comedi-driver
+/* Can't use the nice macro as I have also to initialise the USB */
+/* subsystem: */
+/* registering the usb-system _and_ the comedi-driver */
 static int init_usbdux(void)
 {
         printk(KERN_INFO KBUILD_MODNAME ": "
@@ -2873,7 +2888,7 @@ static int init_usbdux(void)
         return 0;
 }
 
-// deregistering the comedi driver and the usb-subsystem
+/* deregistering the comedi driver and the usb-subsystem */
 static void exit_usbdux(void)
 {
         comedi_driver_unregister(&driver_usbdux);