To handle CMP output connection, this patch adds some macros, codes with condition of direction and new functions. 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 | 102 +++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 93 insertions(+), 9 deletions(-)
diff --git a/sound/firewire/cmp.c b/sound/firewire/cmp.c index a8d3d5f..9e70077 100644 --- a/sound/firewire/cmp.c +++ b/sound/firewire/cmp.c @@ -29,6 +29,16 @@ #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 +#define OPCR_PAYLOAD_MASK 0x000003FF +#define OPCR_PAYLOAD_SHIFT 0 + enum bus_reset_handling { ABORT_ON_BUS_RESET, SUCCEED_ON_BUS_RESET, @@ -41,10 +51,30 @@ 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 unsigned long long get_offset(struct cmp_connection *c, bool master) +{ + unsigned long long offset = CSR_REGISTER_BASE; + + if (!master) { + if (c->direction == CMP_INPUT) + offset += CSR_IPCR(c->pcr_index); + else + offset += CSR_OPCR(c->pcr_index); + } else { + if (c->direction == CMP_INPUT) + offset += CSR_IMPR; + else + offset += CSR_OMPR; + } + + return offset; +} + static int pcr_modify(struct cmp_connection *c, __be32 (*modify)(struct cmp_connection *c, __be32 old), int (*check)(struct cmp_connection *c, __be32 pcr), @@ -64,8 +94,7 @@ static int pcr_modify(struct cmp_connection *c, rcode = fw_run_transaction( device->card, TCODE_LOCK_COMPARE_SWAP, device->node_id, generation, device->max_speed, - CSR_REGISTER_BASE + CSR_IPCR(c->pcr_index), - buffer, 8); + get_offset(c, false), buffer, 8);
if (rcode == RCODE_COMPLETE) { if (buffer[0] == old_arg) /* success? */ @@ -110,8 +139,7 @@ int cmp_connection_init(struct cmp_connection *c, int err;
err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST, - CSR_REGISTER_BASE + CSR_IMPR, - &mpr_be, 4); + get_offset(c, true), &mpr_be, 4); if (err < 0) return err; mpr = be32_to_cpu(mpr_be); @@ -130,6 +158,7 @@ int cmp_connection_init(struct cmp_connection *c, c->max_speed = (mpr & MPR_SPEED_MASK) >> MPR_SPEED_SHIFT; if (c->max_speed == SCODE_BETA) c->max_speed += (mpr & MPR_XSPEED_MASK) >> MPR_XSPEED_SHIFT; + c->direction = direction;
return 0; } @@ -159,6 +188,51 @@ 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. + */ + id = DIV_ROUND_UP(c->resources.bandwidth_overhead, 32); + if (id >= 16) + id = 0; + + return id; +} + +static __be32 opcr_set_modify(struct cmp_connection *c, __be32 opcr) +{ + unsigned int spd, xspd; + + 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); + + /* NOTE: payload field is set by target device */ + + return opcr; +} + static int pcr_set_check(struct cmp_connection *c, __be32 pcr) { if (pcr & cpu_to_be32(PCR_BCAST_CONN | @@ -204,8 +278,13 @@ 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; @@ -253,8 +332,13 @@ 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;