*
*/
-// 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>
#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),
* 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;
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
#endif
if (do_unlink) {
- // stop aquistion
+ /* stop aquistion */
ret = usbduxsub_unlink_InURBs(this_usbduxsub);
}
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
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;
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);
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;
}
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,
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);
}
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;
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");
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);
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++) {
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);
}
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;
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);
}
}
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");
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");
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);
return errcode;
}
} else {
- // no device on the bus for this index
+ /* no device on the bus for this index */
return -EFAULT;
}
return 0;
#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;
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)
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;
}
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;
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;
}
}
}
- // the same argument
+ /* the same argument */
if (cmd->scan_end_arg != cmd->chanlist_len) {
cmd->scan_end_arg = cmd->chanlist_len;
err++;
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);
return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3);
}
-// bulk transfers to usbdux
+/* bulk transfers to usbdux */
#define SENDADCOMMANDS 0
#define SENDDACOMMANDS 1
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;
}
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);
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;
return i;
}
-//////////////////
-// analog out
+/************************************/
+/* analog out */
static int usbdux_ao_insn_read(comedi_device *dev, comedi_subdevice *s,
comedi_insn *insn, lsampl_t *data)
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) {
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)
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;
}
}
- // the same argument
+ /* the same argument */
if (cmd->scan_end_arg != cmd->chanlist_len) {
cmd->scan_end_arg = cmd->chanlist_len;
err++;
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]);
#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);
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;
}
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;
}
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;
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)
{
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");
#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,
}
-// 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;
printk("comedi%d: usbdux_pwm_start\n", dev->minor);
#endif
if (this_usbduxsub->pwm_cmd_running) {
- // already running
+ /* already running */
return 0;
}
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;
}
}
-// 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)
{
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;
}
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);
}
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++;
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] == '#')
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);
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");
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)
{
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)) {
}
}
- // no more space
+ /* no more space */
if (index == -1) {
printk("Too many usbdux-devices connected.\n");
up(&start_stop_sem);
#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");
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");
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");
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");
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");
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",
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);
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",
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);
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",
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;
}
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)) {
}
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,
/* 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);
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;
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;
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));
}
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;
#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));
.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 ": "
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);
projects / linux-2.6-omap-h63xx.git / commitdiff