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From: peng.fan@oss.nxp.com
To: ohad@wizery.com, bjorn.andersson@linaro.org,
	mathieu.poirier@linaro.org, o.rempel@pengutronix.de,
	robh+dt@kernel.org, devicetree@vger.kernel.org
Cc: shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com,
	linux-remoteproc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, Peng Fan <peng.fan@nxp.com>
Subject: [PATCH V5 7/8] remoteproc: imx_rproc: support i.MX7ULP
Date: Wed, 21 Apr 2021 10:20:21 +0800
Message-ID: <1618971622-30539-8-git-send-email-peng.fan@oss.nxp.com> (raw)
In-Reply-To: <1618971622-30539-1-git-send-email-peng.fan@oss.nxp.com>

From: Peng Fan <peng.fan@nxp.com>

i.MX7ULP A7 core runs under control of M4 core, M4 core starts by ROM
and powers most serivces used by A7 core, so A7 core has no power to
start and stop M4 core. And the M4 core's state is default RPROC_DETACHED
and remoteproc framework not able to stop the M4 core.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/imx_rproc.c | 49 ++++++++++++++++++++++++++--------
 1 file changed, 38 insertions(+), 11 deletions(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index e9d9860e4fce..d26254609a52 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -136,6 +136,14 @@ static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
 	{ 0x40000000, 0x40000000, 0x80000000, 0 },
 };
 
+static const struct imx_rproc_att imx_rproc_att_imx7ulp[] = {
+	{0x1FFD0000, 0x1FFD0000, 0x30000, ATT_OWN},
+	{0x20000000, 0x20000000, 0x10000, ATT_OWN},
+	{0x2F000000, 0x2F000000, 0x20000, ATT_OWN},
+	{0x2F020000, 0x2F020000, 0x20000, ATT_OWN},
+	{0x60000000, 0x60000000, 0x40000000, 0}
+};
+
 static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
 	/* dev addr , sys addr  , size	    , flags */
 	/* OCRAM_S (M4 Boot code) - alias */
@@ -196,6 +204,12 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
 	.method		= IMX_RPROC_MMIO,
 };
 
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx7ulp = {
+	.att		= imx_rproc_att_imx7ulp,
+	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7ulp),
+	.method		= IMX_RPROC_NONE,
+};
+
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
 	.src_reg	= IMX7D_SRC_SCR,
 	.src_mask	= IMX7D_M4_RST_MASK,
@@ -238,6 +252,9 @@ static int imx_rproc_stop(struct rproc *rproc)
 	struct device *dev = priv->dev;
 	int ret;
 
+	if (dcfg->method == IMX_RPROC_NONE)
+		return -EOPNOTSUPP;
+
 	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
 				 dcfg->src_mask, dcfg->src_stop);
 	if (ret)
@@ -573,12 +590,31 @@ static void imx_rproc_free_mbox(struct rproc *rproc)
 
 static int imx_rproc_detect_mode(struct imx_rproc *priv)
 {
+	struct regmap_config config = { .name = "imx-rproc" };
 	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
 	struct device *dev = priv->dev;
+	struct regmap *regmap;
 	int ret;
 	u32 val;
 
-	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
+	switch (dcfg->method) {
+	case IMX_RPROC_NONE:
+		priv->rproc->state = RPROC_DETACHED;
+		return 0;
+	default:
+		break;
+	}
+
+	regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "failed to find syscon\n");
+		return PTR_ERR(regmap);
+	}
+
+	priv->regmap = regmap;
+	regmap_attach_dev(dev, regmap, &config);
+
+	ret = regmap_read(regmap, dcfg->src_reg, &val);
 	if (ret) {
 		dev_err(dev, "Failed to read src\n");
 		return ret;
@@ -625,18 +661,9 @@ static int imx_rproc_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct imx_rproc *priv;
 	struct rproc *rproc;
-	struct regmap_config config = { .name = "imx-rproc" };
 	const struct imx_rproc_dcfg *dcfg;
-	struct regmap *regmap;
 	int ret;
 
-	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
-	if (IS_ERR(regmap)) {
-		dev_err(dev, "failed to find syscon\n");
-		return PTR_ERR(regmap);
-	}
-	regmap_attach_dev(dev, regmap, &config);
-
 	/* set some other name then imx */
 	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
 			    NULL, sizeof(*priv));
@@ -651,7 +678,6 @@ static int imx_rproc_probe(struct platform_device *pdev)
 
 	priv = rproc->priv;
 	priv->rproc = rproc;
-	priv->regmap = regmap;
 	priv->dcfg = dcfg;
 	priv->dev = dev;
 
@@ -720,6 +746,7 @@ static int imx_rproc_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id imx_rproc_of_match[] = {
+	{ .compatible = "fsl,imx7ulp-cm4", .data = &imx_rproc_cfg_imx7ulp },
 	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
 	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
 	{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
-- 
2.30.0


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Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21  2:20 [PATCH V5 0/8] remoteproc: imx_rproc: support i.MX7ULP/8MN/8MP peng.fan
2021-04-21  2:20 ` [PATCH V5 1/8] dt-bindings: remoteproc: imx_rproc: add fsl, auto-boot property peng.fan
2021-04-21  2:20 ` [PATCH V5 2/8] dt-bindings: remoteproc: imx_rproc: add i.MX7ULP support peng.fan
2021-04-21  2:20 ` [PATCH V5 3/8] dt-bindings: remoteproc: imx_rproc: support i.MX8MN/P peng.fan
2021-04-21  2:20 ` [PATCH V5 4/8] remoteproc: imx_rproc: parse fsl,auto-boot peng.fan
2021-04-21  2:20 ` [PATCH V5 5/8] remoteproc: imx_rproc: initial support for mutilple start/stop method peng.fan
2021-05-03 16:30   ` Mathieu Poirier
2021-04-21  2:20 ` [PATCH V5 6/8] remoteproc: imx_rproc: make clk optional peng.fan
2021-04-21  2:20 ` peng.fan [this message]
2021-05-03 16:29   ` [PATCH V5 7/8] remoteproc: imx_rproc: support i.MX7ULP Mathieu Poirier
2021-05-06  4:11     ` Peng Fan
2021-04-21  2:20 ` [PATCH V5 8/8] remoteproc: imx_rproc: support i.MX8MN/P peng.fan
2021-05-03 16:25   ` Mathieu Poirier
2021-04-22 16:56 ` [PATCH V5 0/8] remoteproc: imx_rproc: support i.MX7ULP/8MN/8MP Mathieu Poirier
2021-04-23  1:01   ` Peng Fan
2021-04-23 14:50     ` Mathieu Poirier
2021-04-23 23:28       ` Peng Fan
2021-04-26 15:46         ` Mathieu Poirier
2021-04-26 23:45           ` Peng Fan

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