#define DAS16M1_SIZE 16
#define DAS16M1_SIZE2 8
-#define DAS16M1_XTAL 100 //10 MHz master clock
+#define DAS16M1_XTAL 100 /* 10 MHz master clock */
-#define FIFO_SIZE 1024 // 1024 sample fifo
+#define FIFO_SIZE 1024 /* 1024 sample fifo */
/*
CIO-DAS16_M1.pdf
*/
-#define DAS16M1_AI 0 // 16-bit wide register
+#define DAS16M1_AI 0 /* 16-bit wide register */
#define AI_CHAN(x) ((x) & 0xf)
#define DAS16M1_CS 2
#define EXT_TRIG_BIT 0x1
static const struct das16m1_board das16m1_boards[] = {
{
- name: "cio-das16/m1", // CIO-DAS16_M1.pdf
- ai_speed:1000, // 1MHz max speed
+ name: "cio-das16/m1", /* CIO-DAS16_M1.pdf */
+ ai_speed:1000, /* 1MHz max speed */
},
};
struct das16m1_private_struct {
unsigned int control_state;
- volatile unsigned int adc_count; // number of samples completed
+ volatile unsigned int adc_count; /* number of samples completed */
/* initial value in lower half of hardware conversion counter,
* needed to keep track of whether new count has been loaded into
* counter yet (loaded by first sample conversion) */
u16 initial_hw_count;
short ai_buffer[FIFO_SIZE];
- unsigned int do_bits; // saves status of digital output bits
- unsigned int divisor1; // divides master clock to obtain conversion speed
- unsigned int divisor2; // divides master clock to obtain conversion speed
+ unsigned int do_bits; /* saves status of digital output bits */
+ unsigned int divisor1; /* divides master clock to obtain conversion speed */
+ unsigned int divisor2; /* divides master clock to obtain conversion speed */
};
#define devpriv ((struct das16m1_private_struct *)(dev->private))
#define thisboard ((const struct das16m1_board *)(dev->board_ptr))
if (err)
return 4;
- // check chanlist against board's peculiarities
+ /* check chanlist against board's peculiarities */
if (cmd->chanlist && cmd->chanlist_len > 1) {
for (i = 0; i < cmd->chanlist_len; i++) {
- // even/odd channels must go into even/odd queue addresses
+ /* even/odd channels must go into even/odd queue addresses */
if ((i % 2) != (CR_CHAN(cmd->chanlist[i]) % 2)) {
comedi_error(dev, "bad chanlist:\n"
" even/odd channels must go have even/odd chanlist indices");
devpriv->control_state &= ~INTE & ~PACER_MASK;
outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
- // set software count
+ /* set software count */
devpriv->adc_count = 0;
/* Initialize lower half of hardware counter, used to determine how
* many samples are in fifo. Value doesn't actually load into counter
das16m1_set_pacer(dev, cmd->convert_arg,
cmd->flags & TRIG_ROUND_MASK);
- // set control & status register
+ /* set control & status register */
byte = 0;
/* if we are using external start trigger (also board dislikes having
* both start and conversion triggers external simultaneously) */
{
unsigned int wbits;
- // only set bits that have been masked
+ /* only set bits that have been masked */
data[0] &= 0xf;
wbits = devpriv->do_bits;
- // zero bits that have been masked
+ /* zero bits that have been masked */
wbits &= ~data[0];
- // set masked bits
+ /* set masked bits */
wbits |= data[0] & data[1];
devpriv->do_bits = wbits;
data[1] = wbits;
unsigned long flags;
unsigned int status;
- // prevent race with interrupt handler
+ /* prevent race with interrupt handler */
comedi_spin_lock_irqsave(&dev->spinlock, flags);
status = inb(dev->iobase + DAS16M1_CS);
das16m1_handler(dev, status);
comedi_error(dev, "premature interrupt");
return IRQ_HANDLED;
}
- // prevent race with comedi_poll()
+ /* prevent race with comedi_poll() */
spin_lock(&dev->spinlock);
status = inb(dev->iobase + DAS16M1_CS);
async->events = 0;
cmd = &async->cmd;
- // figure out how many samples are in fifo
+ /* figure out how many samples are in fifo */
hw_counter = i8254_read(dev->iobase + DAS16M1_8254_FIRST, 0, 1);
/* make sure hardware counter reading is not bogus due to initial value
* not having been loaded yet */
* hardware counter. Work it out, and this is what you get. */
num_samples = -hw_counter - devpriv->adc_count;
}
- // check if we only need some of the points
+ /* check if we only need some of the points */
if (cmd->stop_src == TRIG_COUNT) {
if (num_samples > cmd->stop_arg * cmd->chanlist_len)
num_samples = cmd->stop_arg * cmd->chanlist_len;
}
- // make sure we dont try to get too many points if fifo has overrun
+ /* make sure we dont try to get too many points if fifo has overrun */
if (num_samples > FIFO_SIZE)
num_samples = FIFO_SIZE;
insw(dev->iobase, devpriv->ai_buffer, num_samples);
/* now for the irq */
irq = it->options[1];
- // make sure it is valid
+ /* make sure it is valid */
if (das16m1_irq_bits(irq) >= 0) {
ret = comedi_request_irq(irq, das16m1_interrupt, 0,
driver_das16m1.driver_name, dev);
/* 8255 */
subdev_8255_init(dev, s, NULL, dev->iobase + DAS16M1_82C55);
- // disable upper half of hardware conversion counter so it doesn't mess with us
+ /* disable upper half of hardware conversion counter so it doesn't mess with us */
outb(TOTAL_CLEAR, dev->iobase + DAS16M1_8254_FIRST_CNTRL);
- // initialize digital output lines
+ /* initialize digital output lines */
outb(devpriv->do_bits, dev->iobase + DAS16M1_DIO);
/* set the interrupt level */
{
printk("comedi%d: das16m1: remove\n", dev->minor);
-// das16m1_reset(dev);
+/* das16m1_reset(dev); */
if (dev->subdevices)
subdev_8255_cleanup(dev, dev->subdevices + 3);
projects / mirror_ubuntu-hirsute-kernel.git / blobdiff