@@ -29,6 +29,14 @@
#define PCR_CHANNEL_MASK 0x003f0000
#define PCR_CHANNEL_SHIFT 16
+/* oPCR specific fields */
+#define OPCR_XSPEED_MASK 0x00C00000
+#define OPCR_XSPEED_SHIFT 22
+#define OPCR_SPEED_MASK 0x0000C000
+#define OPCR_SPEED_SHIFT 14
+#define OPCR_OVERHEAD_ID_MASK 0x00003C00
+#define OPCR_OVERHEAD_ID_SHIFT 10
+
enum bus_reset_handling {
ABORT_ON_BUS_RESET,
SUCCEED_ON_BUS_RESET,
@@ -41,10 +49,27 @@ void cmp_error(struct cmp_connection *c, const char *fmt, ...)
va_start(va, fmt);
dev_err(&c->resources.unit->device, "%cPCR%u: %pV",
- 'i', c->pcr_index, &(struct va_format){ fmt, &va });
+ (c->direction == CMP_INPUT) ? 'i' : 'o',
+ c->pcr_index, &(struct va_format){ fmt, &va });
va_end(va);
}
+static u64 mpr_address(struct cmp_connection *c)
+{
+ if (c->direction == CMP_INPUT)
+ return CSR_REGISTER_BASE + CSR_IMPR;
+ else
+ return CSR_REGISTER_BASE + CSR_OMPR;
+}
+
+static u64 pcr_address(struct cmp_connection *c)
+{
+ if (c->direction == CMP_INPUT)
+ return CSR_REGISTER_BASE + CSR_IPCR(c->pcr_index);
+ else
+ return CSR_REGISTER_BASE + CSR_OPCR(c->pcr_index);
+}
+
static int pcr_modify(struct cmp_connection *c,
__be32 (*modify)(struct cmp_connection *c, __be32 old),
int (*check)(struct cmp_connection *c, __be32 pcr),
@@ -60,8 +85,7 @@ static int pcr_modify(struct cmp_connection *c,
err = snd_fw_transaction(
c->resources.unit, TCODE_LOCK_COMPARE_SWAP,
- CSR_REGISTER_BASE + CSR_IPCR(c->pcr_index),
- buffer, 8,
+ pcr_address(c), buffer, 8,
FW_FIXED_GENERATION | c->resources.generation);
if (err < 0) {
@@ -101,9 +125,9 @@ int cmp_connection_init(struct cmp_connection *c,
u32 mpr;
int err;
+ c->direction = direction;
err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST,
- CSR_REGISTER_BASE + CSR_IMPR,
- &mpr_be, 4, 0);
+ mpr_address(c), &mpr_be, 4, 0);
if (err < 0)
return err;
mpr = be32_to_cpu(mpr_be);
@@ -151,6 +175,53 @@ static __be32 ipcr_set_modify(struct cmp_connection *c, __be32 ipcr)
return ipcr;
}
+static int get_overhead_id(struct cmp_connection *c)
+{
+ int id;
+
+ /*
+ * apply "oPCR overhead ID encoding"
+ * the encoding table can convert up to 512.
+ * here the value over 512 is converted as the same way as 512.
+ */
+ for (id = 1; id < 16; id++) {
+ if (c->resources.bandwidth_overhead < (id << 5))
+ break;
+ }
+ if (id == 16)
+ id = 0;
+
+ return id;
+}
+
+static __be32 opcr_set_modify(struct cmp_connection *c, __be32 opcr)
+{
+ unsigned int spd, xspd;
+
+ /* generate speed and extended speed field value */
+ if (c->speed > SCODE_400) {
+ spd = SCODE_800;
+ xspd = c->speed - SCODE_800;
+ } else {
+ spd = c->speed;
+ xspd = 0;
+ }
+
+ opcr &= ~cpu_to_be32(PCR_BCAST_CONN |
+ PCR_P2P_CONN_MASK |
+ OPCR_XSPEED_MASK |
+ PCR_CHANNEL_MASK |
+ OPCR_SPEED_MASK |
+ OPCR_OVERHEAD_ID_MASK);
+ opcr |= cpu_to_be32(1 << PCR_P2P_CONN_SHIFT);
+ opcr |= cpu_to_be32(xspd << OPCR_XSPEED_SHIFT);
+ opcr |= cpu_to_be32(c->resources.channel << PCR_CHANNEL_SHIFT);
+ opcr |= cpu_to_be32(spd << OPCR_SPEED_SHIFT);
+ opcr |= cpu_to_be32(get_overhead_id(c) << OPCR_OVERHEAD_ID_SHIFT);
+
+ return opcr;
+}
+
static int pcr_set_check(struct cmp_connection *c, __be32 pcr)
{
if (pcr & cpu_to_be32(PCR_BCAST_CONN |
@@ -196,8 +267,13 @@ retry_after_bus_reset:
if (err < 0)
goto err_mutex;
- err = pcr_modify(c, ipcr_set_modify, pcr_set_check,
- ABORT_ON_BUS_RESET);
+ if (c->direction == CMP_OUTPUT)
+ err = pcr_modify(c, opcr_set_modify, pcr_set_check,
+ ABORT_ON_BUS_RESET);
+ else
+ err = pcr_modify(c, ipcr_set_modify, pcr_set_check,
+ ABORT_ON_BUS_RESET);
+
if (err == -EAGAIN) {
fw_iso_resources_free(&c->resources);
goto retry_after_bus_reset;
@@ -245,8 +321,13 @@ int cmp_connection_update(struct cmp_connection *c)
if (err < 0)
goto err_unconnect;
- err = pcr_modify(c, ipcr_set_modify, pcr_set_check,
- SUCCEED_ON_BUS_RESET);
+ if (c->direction == CMP_OUTPUT)
+ err = pcr_modify(c, opcr_set_modify, pcr_set_check,
+ SUCCEED_ON_BUS_RESET);
+ else
+ err = pcr_modify(c, ipcr_set_modify, pcr_set_check,
+ SUCCEED_ON_BUS_RESET);
+
if (err < 0)
goto err_resources;
This patch adds some macros, codes with condition of direction and new functions to handle output connection. Once cmp_connection_init() is executed with its direction, CMP input and output connection can be handled by the same way. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> --- sound/firewire/cmp.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 90 insertions(+), 9 deletions(-)