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staging: comedi: ni_mio_common: use comedi_buf_write_samples()

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Use comedi_buf_write_samples() to add the samples to the async buffer.
That function will handle single and multi sample writes by determining
the number of bytes to add based on the bytes_per_sample().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2014-10-22 15:36:36 -07:00 committed by Greg Kroah-Hartman
parent 7ba38a0144
commit 9caba32961
1 changed files with 29 additions and 34 deletions
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63
drivers/staging/comedi/drivers/ni_mio_common.c
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@ -1226,44 +1226,42 @@ static void ni_ai_fifo_read(struct comedi_device *dev,
{
struct ni_private *devpriv = dev->private;
struct comedi_async *async = s->async;
u32 dl;
unsigned short data;
int i;
if (devpriv->is_611x) {
unsigned short data[2];
u32 dl;
for (i = 0; i < n / 2; i++) {
dl = ni_readl(dev, ADC_FIFO_Data_611x);
/* This may get the hi/lo data in the wrong order */
data[0] = (dl >> 16) & 0xffff;
data[1] = dl & 0xffff;
cfc_write_array_to_buffer(s, data, sizeof(data));
data = (dl >> 16) & 0xffff;
comedi_buf_write_samples(s, &data, 1);
data = dl & 0xffff;
comedi_buf_write_samples(s, &data, 1);
}
/* Check if there's a single sample stuck in the FIFO */
if (n % 2) {
dl = ni_readl(dev, ADC_FIFO_Data_611x);
data[0] = dl & 0xffff;
cfc_write_to_buffer(s, data[0]);
data = dl & 0xffff;
comedi_buf_write_samples(s, &data, 1);
}
} else if (devpriv->is_6143) {
unsigned short data[2];
u32 dl;
/* This just reads the FIFO assuming the data is present, no checks on the FIFO status are performed */
for (i = 0; i < n / 2; i++) {
dl = ni_readl(dev, AIFIFO_Data_6143);
data[0] = (dl >> 16) & 0xffff;
data[1] = dl & 0xffff;
cfc_write_array_to_buffer(s, data, sizeof(data));
data = (dl >> 16) & 0xffff;
comedi_buf_write_samples(s, &data, 1);
data = dl & 0xffff;
comedi_buf_write_samples(s, &data, 1);
}
if (n % 2) {
/* Assume there is a single sample stuck in the FIFO */
/* Get stranded sample into FIFO */
ni_writel(dev, 0x01, AIFIFO_Control_6143);
dl = ni_readl(dev, AIFIFO_Data_6143);
data[0] = (dl >> 16) & 0xffff;
cfc_write_to_buffer(s, data[0]);
data = (dl >> 16) & 0xffff;
comedi_buf_write_samples(s, &data, 1);
}
} else {
if (n > sizeof(devpriv->ai_fifo_buffer) /
@ -1277,9 +1275,7 @@ static void ni_ai_fifo_read(struct comedi_device *dev,
devpriv->ai_fifo_buffer[i] =
ni_readw(dev, ADC_FIFO_Data_Register);
}
cfc_write_array_to_buffer(s, devpriv->ai_fifo_buffer,
n *
sizeof(devpriv->ai_fifo_buffer[0]));
comedi_buf_write_samples(s, devpriv->ai_fifo_buffer, n);
}
}
@ -1302,8 +1298,8 @@ static void ni_handle_fifo_dregs(struct comedi_device *dev)
{
struct ni_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->read_subdev;
unsigned short data[2];
u32 dl;
unsigned short data;
unsigned short fifo_empty;
int i;
@ -1313,9 +1309,10 @@ static void ni_handle_fifo_dregs(struct comedi_device *dev)
dl = ni_readl(dev, ADC_FIFO_Data_611x);
/* This may get the hi/lo data in the wrong order */
data[0] = (dl >> 16);
data[1] = (dl & 0xffff);
cfc_write_array_to_buffer(s, data, sizeof(data));
data = dl >> 16;
comedi_buf_write_samples(s, &data, 1);
data = dl & 0xffff;
comedi_buf_write_samples(s, &data, 1);
}
} else if (devpriv->is_6143) {
i = 0;
@ -1323,9 +1320,10 @@ static void ni_handle_fifo_dregs(struct comedi_device *dev)
dl = ni_readl(dev, AIFIFO_Data_6143);
/* This may get the hi/lo data in the wrong order */
data[0] = (dl >> 16);
data[1] = (dl & 0xffff);
cfc_write_array_to_buffer(s, data, sizeof(data));
data = dl >> 16;
comedi_buf_write_samples(s, &data, 1);
data = dl & 0xffff;
comedi_buf_write_samples(s, &data, 1);
i += 2;
}
/* Check if stranded sample is present */
@ -1333,8 +1331,8 @@ static void ni_handle_fifo_dregs(struct comedi_device *dev)
/* Get stranded sample into FIFO */
ni_writel(dev, 0x01, AIFIFO_Control_6143);
dl = ni_readl(dev, AIFIFO_Data_6143);
data[0] = (dl >> 16) & 0xffff;
cfc_write_to_buffer(s, data[0]);
data = (dl >> 16) & 0xffff;
comedi_buf_write_samples(s, &data, 1);
}
} else {
@ -1353,10 +1351,7 @@ static void ni_handle_fifo_dregs(struct comedi_device *dev)
devpriv->ai_fifo_buffer[i] =
ni_readw(dev, ADC_FIFO_Data_Register);
}
cfc_write_array_to_buffer(s, devpriv->ai_fifo_buffer,
i *
sizeof(devpriv->
ai_fifo_buffer[0]));
comedi_buf_write_samples(s, devpriv->ai_fifo_buffer, i);
}
}
}
@ -1375,7 +1370,7 @@ static void get_last_sample_611x(struct comedi_device *dev)
if (ni_readb(dev, XXX_Status) & 0x80) {
dl = ni_readl(dev, ADC_FIFO_Data_611x);
data = (dl & 0xffff);
cfc_write_to_buffer(s, data);
comedi_buf_write_samples(s, &data, 1);
}
}
@ -1397,7 +1392,7 @@ static void get_last_sample_6143(struct comedi_device *dev)
/* This may get the hi/lo data in the wrong order */
data = (dl >> 16) & 0xffff;
cfc_write_to_buffer(s, data);
comedi_buf_write_samples(s, &data, 1);
}
}