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staging: comedi: pass subdevice to comedi_buf_get() 

Change the parameters of `comedi_buf_get()` to pass a pointer to the
comedi subdevice instead of a pointer to the "async" structure belonging
to the subdevice.

The function gets a sample value from the comedi buffer, but currently
only deals with 16-bit sample types.  A future version could deal with
16 or 32-bit sample types depending on the value of the SDF_LSAMPL
subdevice flag.

The main aim at the moment is to replace all the `struct comedi_async *`
parameters with `struct comedi_subdevice *` parameters in the comedi
driver API.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Ian Abbott 2014-05-06 13:12:00 +01:00 committed by Greg Kroah-Hartman
parent 3672effdea
commit 458c13e935
6 changed files with 9 additions and 8 deletions
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3
drivers/staging/comedi/comedi_buf.c
View File

@ -431,8 +431,9 @@ int comedi_buf_put(struct comedi_subdevice *s, unsigned short x)
}
EXPORT_SYMBOL_GPL(comedi_buf_put);
int comedi_buf_get(struct comedi_async *async, unsigned short *x)
int comedi_buf_get(struct comedi_subdevice *s, unsigned short *x)
{
struct comedi_async *async = s->async;
unsigned int n = comedi_buf_read_n_available(async);
if (n < sizeof(short))

2
drivers/staging/comedi/comedidev.h
View File

@ -344,7 +344,7 @@ unsigned int comedi_buf_read_alloc(struct comedi_async *, unsigned int);
unsigned int comedi_buf_read_free(struct comedi_async *, unsigned int);
int comedi_buf_put(struct comedi_subdevice *s, unsigned short x);
int comedi_buf_get(struct comedi_async *, unsigned short *);
int comedi_buf_get(struct comedi_subdevice *s, unsigned short *x);
void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset,
const void *source, unsigned int num_bytes);

4
drivers/staging/comedi/drivers/amplc_pci230.c
View File

@ -1164,7 +1164,7 @@ static void pci230_handle_ao_nofifo(struct comedi_device *dev,
return;
for (i = 0; i < cmd->chanlist_len; i++) {
/* Read sample from Comedi's circular buffer. */
ret = comedi_buf_get(s->async, &data);
ret = comedi_buf_get(s, &data);
if (ret == 0) {
s->async->events |= COMEDI_CB_OVERFLOW;
pci230_ao_stop(dev, s);
@ -1250,7 +1250,7 @@ static int pci230_handle_ao_fifo(struct comedi_device *dev,
for (i = 0; i < cmd->chanlist_len; i++) {
unsigned short datum;
comedi_buf_get(async, &datum);
comedi_buf_get(s, &datum);
pci230_ao_write_fifo(dev, datum,
CR_CHAN(cmd->chanlist[i]));
}

4
drivers/staging/comedi/drivers/ni_mio_common.c
View File

@ -1149,7 +1149,7 @@ static void ni_ao_fifo_load(struct comedi_device *dev,
chan = async->cur_chan;
for (i = 0; i < n; i++) {
err &= comedi_buf_get(async, &d);
err &= comedi_buf_get(s, &d);
if (err == 0)
break;
@ -1159,7 +1159,7 @@ static void ni_ao_fifo_load(struct comedi_device *dev,
packed_data = d & 0xffff;
/* 6711 only has 16 bit wide ao fifo */
if (board->reg_type != ni_reg_6711) {
err &= comedi_buf_get(async, &d);
err &= comedi_buf_get(s, &d);
if (err == 0)
break;
chan++;

2
drivers/staging/comedi/drivers/usbdux.c
View File

@ -484,7 +484,7 @@ static void usbduxsub_ao_isoc_irq(struct urb *urb)
unsigned int chan = devpriv->ao_chanlist[i];
unsigned short val;
ret = comedi_buf_get(s->async, &val);
ret = comedi_buf_get(s, &val);
if (ret < 0) {
dev_err(dev->class_dev, "buffer underflow\n");
s->async->events |= (COMEDI_CB_EOA |

2
drivers/staging/comedi/drivers/usbduxsigma.c
View File

@ -423,7 +423,7 @@ static void usbduxsigma_ao_urb_complete(struct urb *urb)
unsigned int chan = devpriv->ao_chanlist[i];
unsigned short val;
ret = comedi_buf_get(s->async, &val);
ret = comedi_buf_get(s, &val);
if (ret < 0) {
dev_err(dev->class_dev, "buffer underflow\n");
s->async->events |= (COMEDI_CB_EOA |