/**
* buffer_icap_device_write - Transfer bytes from ICAP to the storage buffer.
* @drvdata: a pointer to the drvdata.
* @offset: The storage buffer start address.
* @count: The number of words (32 bit) to read from the
* device (ICAP).
**/
static int buffer_icap_device_write(struct hwicap_drvdata *drvdata,
u32 offset, u32 count)
{
s32 retries = 0;
void __iomem *base_address = drvdata->base_address;
if (buffer_icap_busy(base_address))
return -EBUSY;
if ((offset + count) > XHI_MAX_BUFFER_INTS)
return -EINVAL;
/* setSize count*4 to get bytes. */
buffer_icap_set_size(base_address, count << 2);
buffer_icap_set_offset(base_address, offset);
buffer_icap_set_rnc(base_address, XHI_CONFIGURE);
while (buffer_icap_busy(base_address)) {
retries++;
if (retries > XHI_MAX_RETRIES)
return -EBUSY;
}
return 0;
};
static int buffer_icap_device_read(struct hwicap_drvdata *drvdata,
u32 offset, u32 count)
{
s32 retries = 0;
void __iomem *base_address = drvdata->base_address;
if (buffer_icap_busy(base_address))
return -EBUSY;
if ((offset + count) > XHI_MAX_BUFFER_INTS)
return -EINVAL;
buffer_icap_set_size(base_address, (count << 2));
buffer_icap_set_offset(base_address, offset);
buffer_icap_set_rnc(base_address, XHI_READBACK);
while (buffer_icap_busy(base_address)) {
retries++;
if (retries > XHI_MAX_RETRIES)
return -EBUSY;
}
return 0;
};