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From:   Bjorn Andersson <bjorn.andersson@linaro.org>
To:     Ohad Ben-Cohen <ohad@wizery.com>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Sricharan R <sricharan@codeaurora.org>,
        Sibi Sankar <sibis@codeaurora.org>,
        Rohit kumar <rohitkr@codeaurora.org>
Cc:     Andy Gross <andy.gross@linaro.org>, linux-kernel@vger.kernel.org,
        linux-remoteproc@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: [PATCH 3/4] remoteproc: qcom: adsp: Use common q6v5 helpers
Date:   Mon,  4 Jun 2018 13:30:37 -0700
Message-Id: <20180604203038.14080-4-bjorn.andersson@linaro.org>
In-Reply-To: <20180604203038.14080-1-bjorn.andersson@linaro.org>
References: <20180604203038.14080-1-bjorn.andersson@linaro.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Migrate the Hexagon V5 PAS (ADSP) driver to using the newly extracted
helper functions. The use of the handover callback does introduce latent
disabling of proxy resources. But apart from this there should be no
change in functionality.

Reviewed-by: Rohit kumar <rohitkr@codeaurora.org>
Reviewed-by: Sricharan R <sricharan@codeaurora.org>
Tested-by: Rohit kumar <rohitkr@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

Changes since RFC:
- Picked up reviewed-by from Rohit and Sricharan

 drivers/remoteproc/Kconfig         |   1 +
 drivers/remoteproc/qcom_adsp_pil.c | 156 +++++------------------------
 2 files changed, 28 insertions(+), 129 deletions(-)

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 63b79ea91a21..d51d155cf8bd 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -93,6 +93,7 @@ config QCOM_ADSP_PIL
 	depends on QCOM_SYSMON || QCOM_SYSMON=n
 	select MFD_SYSCON
 	select QCOM_MDT_LOADER
+	select QCOM_Q6V5_COMMON
 	select QCOM_RPROC_COMMON
 	select QCOM_SCM
 	help
diff --git a/drivers/remoteproc/qcom_adsp_pil.c b/drivers/remoteproc/qcom_adsp_pil.c
index 89a86ce07f99..d4339a6da616 100644
--- a/drivers/remoteproc/qcom_adsp_pil.c
+++ b/drivers/remoteproc/qcom_adsp_pil.c
@@ -31,6 +31,7 @@
 #include <linux/soc/qcom/smem_state.h>
 
 #include "qcom_common.h"
+#include "qcom_q6v5.h"
 #include "remoteproc_internal.h"
 
 struct adsp_data {
@@ -48,14 +49,7 @@ struct qcom_adsp {
 	struct device *dev;
 	struct rproc *rproc;
 
-	int wdog_irq;
-	int fatal_irq;
-	int ready_irq;
-	int handover_irq;
-	int stop_ack_irq;
-
-	struct qcom_smem_state *state;
-	unsigned stop_bit;
+	struct qcom_q6v5 q6v5;
 
 	struct clk *xo;
 	struct clk *aggre2_clk;
@@ -96,6 +90,8 @@ static int adsp_start(struct rproc *rproc)
 	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
 	int ret;
 
+	qcom_q6v5_prepare(&adsp->q6v5);
+
 	ret = clk_prepare_enable(adsp->xo);
 	if (ret)
 		return ret;
@@ -119,16 +115,14 @@ static int adsp_start(struct rproc *rproc)
 		goto disable_px_supply;
 	}
 
-	ret = wait_for_completion_timeout(&adsp->start_done,
-					  msecs_to_jiffies(5000));
-	if (!ret) {
+	ret = qcom_q6v5_wait_for_start(&adsp->q6v5, msecs_to_jiffies(5000));
+	if (ret == -ETIMEDOUT) {
 		dev_err(adsp->dev, "start timed out\n");
 		qcom_scm_pas_shutdown(adsp->pas_id);
-		ret = -ETIMEDOUT;
 		goto disable_px_supply;
 	}
 
-	ret = 0;
+	return 0;
 
 disable_px_supply:
 	regulator_disable(adsp->px_supply);
@@ -142,28 +136,34 @@ static int adsp_start(struct rproc *rproc)
 	return ret;
 }
 
+static void qcom_pas_handover(struct qcom_q6v5 *q6v5)
+{
+	struct qcom_adsp *adsp = container_of(q6v5, struct qcom_adsp, q6v5);
+
+	regulator_disable(adsp->px_supply);
+	regulator_disable(adsp->cx_supply);
+	clk_disable_unprepare(adsp->aggre2_clk);
+	clk_disable_unprepare(adsp->xo);
+}
+
 static int adsp_stop(struct rproc *rproc)
 {
 	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+	int handover;
 	int ret;
 
-	qcom_smem_state_update_bits(adsp->state,
-				    BIT(adsp->stop_bit),
-				    BIT(adsp->stop_bit));
-
-	ret = wait_for_completion_timeout(&adsp->stop_done,
-					  msecs_to_jiffies(5000));
-	if (ret == 0)
+	ret = qcom_q6v5_request_stop(&adsp->q6v5);
+	if (ret == -ETIMEDOUT)
 		dev_err(adsp->dev, "timed out on wait\n");
 
-	qcom_smem_state_update_bits(adsp->state,
-				    BIT(adsp->stop_bit),
-				    0);
-
 	ret = qcom_scm_pas_shutdown(adsp->pas_id);
 	if (ret)
 		dev_err(adsp->dev, "failed to shutdown: %d\n", ret);
 
+	handover = qcom_q6v5_unprepare(&adsp->q6v5);
+	if (handover)
+		qcom_pas_handover(&adsp->q6v5);
+
 	return ret;
 }
 
@@ -187,53 +187,6 @@ static const struct rproc_ops adsp_ops = {
 	.load = adsp_load,
 };
 
-static irqreturn_t adsp_wdog_interrupt(int irq, void *dev)
-{
-	struct qcom_adsp *adsp = dev;
-
-	rproc_report_crash(adsp->rproc, RPROC_WATCHDOG);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t adsp_fatal_interrupt(int irq, void *dev)
-{
-	struct qcom_adsp *adsp = dev;
-	size_t len;
-	char *msg;
-
-	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, adsp->crash_reason_smem, &len);
-	if (!IS_ERR(msg) && len > 0 && msg[0])
-		dev_err(adsp->dev, "fatal error received: %s\n", msg);
-
-	rproc_report_crash(adsp->rproc, RPROC_FATAL_ERROR);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t adsp_ready_interrupt(int irq, void *dev)
-{
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t adsp_handover_interrupt(int irq, void *dev)
-{
-	struct qcom_adsp *adsp = dev;
-
-	complete(&adsp->start_done);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t adsp_stop_ack_interrupt(int irq, void *dev)
-{
-	struct qcom_adsp *adsp = dev;
-
-	complete(&adsp->stop_done);
-
-	return IRQ_HANDLED;
-}
-
 static int adsp_init_clock(struct qcom_adsp *adsp)
 {
 	int ret;
@@ -272,29 +225,6 @@ static int adsp_init_regulator(struct qcom_adsp *adsp)
 	return PTR_ERR_OR_ZERO(adsp->px_supply);
 }
 
-static int adsp_request_irq(struct qcom_adsp *adsp,
-			     struct platform_device *pdev,
-			     const char *name,
-			     irq_handler_t thread_fn)
-{
-	int ret;
-
-	ret = platform_get_irq_byname(pdev, name);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "no %s IRQ defined\n", name);
-		return ret;
-	}
-
-	ret = devm_request_threaded_irq(&pdev->dev, ret,
-					NULL, thread_fn,
-					IRQF_ONESHOT,
-					"adsp", adsp);
-	if (ret)
-		dev_err(&pdev->dev, "request %s IRQ failed\n", name);
-
-	return ret;
-}
-
 static int adsp_alloc_memory_region(struct qcom_adsp *adsp)
 {
 	struct device_node *node;
@@ -348,13 +278,9 @@ static int adsp_probe(struct platform_device *pdev)
 	adsp->dev = &pdev->dev;
 	adsp->rproc = rproc;
 	adsp->pas_id = desc->pas_id;
-	adsp->crash_reason_smem = desc->crash_reason_smem;
 	adsp->has_aggre2_clk = desc->has_aggre2_clk;
 	platform_set_drvdata(pdev, adsp);
 
-	init_completion(&adsp->start_done);
-	init_completion(&adsp->stop_done);
-
 	ret = adsp_alloc_memory_region(adsp);
 	if (ret)
 		goto free_rproc;
@@ -367,37 +293,10 @@ static int adsp_probe(struct platform_device *pdev)
 	if (ret)
 		goto free_rproc;
 
-	ret = adsp_request_irq(adsp, pdev, "wdog", adsp_wdog_interrupt);
-	if (ret < 0)
-		goto free_rproc;
-	adsp->wdog_irq = ret;
-
-	ret = adsp_request_irq(adsp, pdev, "fatal", adsp_fatal_interrupt);
-	if (ret < 0)
-		goto free_rproc;
-	adsp->fatal_irq = ret;
-
-	ret = adsp_request_irq(adsp, pdev, "ready", adsp_ready_interrupt);
-	if (ret < 0)
-		goto free_rproc;
-	adsp->ready_irq = ret;
-
-	ret = adsp_request_irq(adsp, pdev, "handover", adsp_handover_interrupt);
-	if (ret < 0)
-		goto free_rproc;
-	adsp->handover_irq = ret;
-
-	ret = adsp_request_irq(adsp, pdev, "stop-ack", adsp_stop_ack_interrupt);
-	if (ret < 0)
-		goto free_rproc;
-	adsp->stop_ack_irq = ret;
-
-	adsp->state = qcom_smem_state_get(&pdev->dev, "stop",
-					  &adsp->stop_bit);
-	if (IS_ERR(adsp->state)) {
-		ret = PTR_ERR(adsp->state);
+	ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, desc->crash_reason_smem,
+			     qcom_pas_handover);
+	if (ret)
 		goto free_rproc;
-	}
 
 	qcom_add_glink_subdev(rproc, &adsp->glink_subdev);
 	qcom_add_smd_subdev(rproc, &adsp->smd_subdev);
@@ -422,7 +321,6 @@ static int adsp_remove(struct platform_device *pdev)
 {
 	struct qcom_adsp *adsp = platform_get_drvdata(pdev);
 
-	qcom_smem_state_put(adsp->state);
 	rproc_del(adsp->rproc);
 
 	qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
-- 
2.17.0