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Message-Id: <20180705135426.20748-3-srinivas.kandagatla@linaro.org>
Date: Thu, 5 Jul 2018 14:54:26 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: gregkh@...uxfoundation.org, broonie@...nel.org
Cc: vkoul@...nel.org, ctatlor97@...il.com, alsa-devel@...a-project.org,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
sdharia@...cinc.com,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v2 2/2] slimbus: ngd: add stream support
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@...aro.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;
--
2.16.2
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