This patch adds support to stream support, this involve implementing user specific implementation of Data channel management and channel management SLIMbus messages.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- drivers/slimbus/qcom-ngd-ctrl.c | 149 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 147 insertions(+), 2 deletions(-)
diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c index 8554e3f43522..8be4d6786c61 100644 --- a/drivers/slimbus/qcom-ngd-ctrl.c +++ b/drivers/slimbus/qcom-ngd-ctrl.c @@ -603,7 +603,9 @@ static void qcom_slim_ngd_rx(struct qcom_slim_ngd_ctrl *ctrl, u8 *buf)
if (mc == SLIM_MSG_MC_REPLY_INFORMATION || mc == SLIM_MSG_MC_REPLY_VALUE || (mc == SLIM_USR_MC_ADDR_REPLY && - mt == SLIM_MSG_MT_SRC_REFERRED_USER)) { + mt == SLIM_MSG_MT_SRC_REFERRED_USER) || + (mc == SLIM_USR_MC_GENERIC_ACK && + mt == SLIM_MSG_MT_SRC_REFERRED_USER)) { slim_msg_response(&ctrl->ctrl, &buf[4], buf[3], len - 4); pm_runtime_mark_last_busy(ctrl->dev); } @@ -766,10 +768,14 @@ static int qcom_slim_ngd_xfer_msg(struct slim_controller *sctrl, { struct qcom_slim_ngd_ctrl *ctrl = dev_get_drvdata(sctrl->dev); DECLARE_COMPLETION_ONSTACK(tx_sent); - int ret, timeout; + DECLARE_COMPLETION_ONSTACK(done); + int ret, timeout, i; + u8 wbuf[SLIM_MSGQ_BUF_LEN]; + u8 rbuf[SLIM_MSGQ_BUF_LEN]; u32 *pbuf; u8 *puc; u8 la = txn->la; + bool usr_msg = false;
if (txn->mc & SLIM_MSG_CLK_PAUSE_SEQ_FLG) return -EPROTONOSUPPORT; @@ -794,6 +800,48 @@ static int qcom_slim_ngd_xfer_msg(struct slim_controller *sctrl, return -ENOMEM; }
+ if (txn->mt == SLIM_MSG_MT_CORE && + (txn->mc == SLIM_MSG_MC_CONNECT_SOURCE || + txn->mc == SLIM_MSG_MC_CONNECT_SINK || + txn->mc == SLIM_MSG_MC_DISCONNECT_PORT)) { + txn->mt = SLIM_MSG_MT_DEST_REFERRED_USER; + switch (txn->mc) { + case SLIM_MSG_MC_CONNECT_SOURCE: + txn->mc = SLIM_USR_MC_CONNECT_SRC; + break; + case SLIM_MSG_MC_CONNECT_SINK: + txn->mc = SLIM_USR_MC_CONNECT_SINK; + break; + case SLIM_MSG_MC_DISCONNECT_PORT: + txn->mc = SLIM_USR_MC_DISCONNECT_PORT; + break; + default: + return -EINVAL; + } + + usr_msg = true; + i = 0; + wbuf[i++] = txn->la; + la = SLIM_LA_MGR; + wbuf[i++] = txn->msg->wbuf[0]; + if (txn->mc != SLIM_USR_MC_DISCONNECT_PORT) + wbuf[i++] = txn->msg->wbuf[1]; + + txn->comp = &done; + ret = slim_alloc_txn_tid(sctrl, txn); + if (ret) { + dev_err(ctrl->dev, "Unable to allocate TID\n"); + return ret; + } + + wbuf[i++] = txn->tid; + + txn->msg->num_bytes = i; + txn->msg->wbuf = wbuf; + txn->msg->rbuf = rbuf; + txn->rl = txn->msg->num_bytes + 4; + } + /* HW expects length field to be excluded */ txn->rl--; puc = (u8 *)pbuf; @@ -830,6 +878,15 @@ static int qcom_slim_ngd_xfer_msg(struct slim_controller *sctrl, return -ETIMEDOUT; }
+ if (usr_msg) { + timeout = wait_for_completion_timeout(&done, HZ); + if (!timeout) { + dev_err(sctrl->dev, "TX timed out:MC:0x%x,mt:0x%x", + txn->mc, txn->mt); + return -ETIMEDOUT; + } + } + return 0; }
@@ -856,6 +913,93 @@ static int qcom_slim_ngd_xfer_msg_sync(struct slim_controller *ctrl, return 0; }
+static int qcom_slim_ngd_enable_stream(struct slim_stream_runtime *rt) +{ + struct slim_device *sdev = rt->dev; + struct slim_controller *ctrl = sdev->ctrl; + struct slim_val_inf msg = {0}; + u8 wbuf[SLIM_MSGQ_BUF_LEN]; + u8 rbuf[SLIM_MSGQ_BUF_LEN]; + struct slim_msg_txn txn = {0,}; + int i, ret; + + txn.mt = SLIM_MSG_MT_DEST_REFERRED_USER; + txn.dt = SLIM_MSG_DEST_LOGICALADDR; + txn.la = SLIM_LA_MGR; + txn.ec = 0; + txn.msg = &msg; + txn.msg->num_bytes = 0; + txn.msg->wbuf = wbuf; + txn.msg->rbuf = rbuf; + + for (i = 0; i < rt->num_ports; i++) { + struct slim_port *port = &rt->ports[i]; + + if (txn.msg->num_bytes == 0) { + int seg_interval = SLIM_SLOTS_PER_SUPERFRAME/rt->ratem; + int exp; + + wbuf[txn.msg->num_bytes++] = sdev->laddr; + wbuf[txn.msg->num_bytes] = rt->bps >> 2 | + (port->ch.aux_fmt << 6); + + /* Data channel segment interval not multiple of 3 */ + exp = seg_interval % 3; + if (exp) + wbuf[txn.msg->num_bytes] |= BIT(5); + + txn.msg->num_bytes++; + wbuf[txn.msg->num_bytes++] = exp << 4 | rt->prot; + + if (rt->prot == SLIM_PROTO_ISO) + wbuf[txn.msg->num_bytes++] = + port->ch.prrate | + SLIM_CHANNEL_CONTENT_FL; + else + wbuf[txn.msg->num_bytes++] = port->ch.prrate; + + ret = slim_alloc_txn_tid(ctrl, &txn); + if (ret) { + dev_err(&sdev->dev, "Fail to allocate TID\n"); + return -ENXIO; + } + wbuf[txn.msg->num_bytes++] = txn.tid; + } + wbuf[txn.msg->num_bytes++] = port->ch.id; + } + + txn.mc = SLIM_USR_MC_DEF_ACT_CHAN; + txn.rl = txn.msg->num_bytes + 4; + ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn); + if (ret) { + slim_free_txn_tid(ctrl, &txn); + dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc, + txn.mt); + return ret; + } + + txn.mc = SLIM_USR_MC_RECONFIG_NOW; + txn.msg->num_bytes = 2; + wbuf[1] = sdev->laddr; + txn.rl = txn.msg->num_bytes + 4; + + ret = slim_alloc_txn_tid(ctrl, &txn); + if (ret) { + dev_err(ctrl->dev, "Fail to allocate TID\n"); + return ret; + } + + wbuf[0] = txn.tid; + ret = qcom_slim_ngd_xfer_msg_sync(ctrl, &txn); + if (ret) { + slim_free_txn_tid(ctrl, &txn); + dev_err(&sdev->dev, "TX timed out:MC:0x%x,mt:0x%x", txn.mc, + txn.mt); + } + + return ret; +} + static int qcom_slim_ngd_get_laddr(struct slim_controller *ctrl, struct slim_eaddr *ea, u8 *laddr) { @@ -1288,6 +1432,7 @@ static int qcom_slim_ngd_ctrl_probe(struct platform_device *pdev) ctrl->ctrl.a_framer = &ctrl->framer; ctrl->ctrl.clkgear = SLIM_MAX_CLK_GEAR; ctrl->ctrl.get_laddr = qcom_slim_ngd_get_laddr; + ctrl->ctrl.enable_stream = qcom_slim_ngd_enable_stream; ctrl->ctrl.xfer_msg = qcom_slim_ngd_xfer_msg; ctrl->ctrl.wakeup = NULL; ctrl->state = QCOM_SLIM_NGD_CTRL_DOWN;