#define TAG_NO_CIP_HEADER 0
#define TAG_CIP 1
-/* common isochronous packet header parameters */
+// Common Isochronous Packet (CIP) header parameters. Use two quadlets CIP header when supported.
+#define CIP_HEADER_QUADLETS 2
#define CIP_EOH_SHIFT 31
#define CIP_EOH (1u << CIP_EOH_SHIFT)
#define CIP_EOH_MASK 0x80000000
#define CIP_SYT_MASK 0x0000ffff
#define CIP_SYT_NO_INFO 0xffff
+#define CIP_HEADER_SIZE (sizeof(__be32) * CIP_HEADER_QUADLETS)
+
/* Audio and Music transfer protocol specific parameters */
#define CIP_FMT_AM 0x10
#define AMDTP_FDF_NO_DATA 0xff
-// For iso header, tstamp and 2 CIP header.
-#define IR_CTX_HEADER_SIZE_CIP 16
// For iso header and tstamp.
-#define IR_CTX_HEADER_SIZE_NO_CIP 8
+#define IR_CTX_HEADER_DEFAULT_QUADLETS 2
+// Add nothing.
+#define IR_CTX_HEADER_SIZE_NO_CIP (sizeof(__be32) * IR_CTX_HEADER_DEFAULT_QUADLETS)
+// Add two quadlets CIP header.
+#define IR_CTX_HEADER_SIZE_CIP (IR_CTX_HEADER_SIZE_NO_CIP + CIP_HEADER_SIZE)
#define HEADER_TSTAMP_MASK 0x0000ffff
-#define IT_PKT_HEADER_SIZE_CIP 8 // For 2 CIP header.
+#define IT_PKT_HEADER_SIZE_CIP CIP_HEADER_SIZE
#define IT_PKT_HEADER_SIZE_NO_CIP 0 // Nothing.
// The initial firmware of OXFW970 can postpone transmission of packet during finishing
if (s->flags & CIP_JUMBO_PAYLOAD)
multiplier = IR_JUMBO_PAYLOAD_MAX_SKIP_CYCLES;
if (!(s->flags & CIP_NO_HEADER))
- cip_header_size = sizeof(__be32) * 2;
+ cip_header_size = CIP_HEADER_SIZE;
return cip_header_size +
s->syt_interval * s->data_block_quadlets * sizeof(__be32) * multiplier;
payload_length = be32_to_cpu(ctx_header[0]) >> ISO_DATA_LENGTH_SHIFT;
if (!(s->flags & CIP_NO_HEADER))
- cip_header_size = 8;
+ cip_header_size = CIP_HEADER_SIZE;
else
cip_header_size = 0;
if (cip_header_size > 0) {
if (payload_length >= cip_header_size) {
- cip_header = ctx_header + 2;
+ cip_header = ctx_header + IR_CTX_HEADER_DEFAULT_QUADLETS;
err = check_cip_header(s, cip_header, payload_length - cip_header_size,
data_blocks, data_block_counter, syt);
if (err < 0)
unsigned int syt;
struct {
struct fw_iso_packet params;
- __be32 header[IT_PKT_HEADER_SIZE_CIP / sizeof(__be32)];
+ __be32 header[CIP_HEADER_QUADLETS];
} template = { {0}, {0} };
bool sched_irq = false;
dir = DMA_FROM_DEVICE;
type = FW_ISO_CONTEXT_RECEIVE;
if (!(s->flags & CIP_NO_HEADER)) {
- max_ctx_payload_size -= 8;
+ max_ctx_payload_size -= CIP_HEADER_SIZE;
ctx_header_size = IR_CTX_HEADER_SIZE_CIP;
} else {
ctx_header_size = IR_CTX_HEADER_SIZE_NO_CIP;