linux-kernel - [PATCH v16 09/12] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

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Date:   Wed, 14 Jul 2021 18:20:49 +0800
From:   Robin Gong <yibin.gong@....com>
To:     vkoul@...nel.org, mark.rutland@....com, broonie@...nel.org,
        robh+dt@...nel.org, catalin.marinas@....com, will.deacon@....com,
        shawnguo@...nel.org, festevam@...il.com, s.hauer@...gutronix.de,
        martin.fuzzey@...wbird.group, u.kleine-koenig@...gutronix.de,
        dan.j.williams@...el.com, matthias.schiffer@...tq-group.com,
        frieder.schrempf@...tron.de, m.felsch@...gutronix.de,
        l.stach@...gutronix.de, xiaoning.wang@....com
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org, linux-imx@....com,
        kernel@...gutronix.de, dmaengine@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v16 09/12] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

ECSPI issue fixed from i.mx6ul at hardware level, no need
ERR009165 anymore on those chips such as i.mx8mq.

Signed-off-by: Robin Gong <yibin.gong@....com>
Acked-by: Vinod Koul <vkoul@...nel.org>
---
 drivers/dma/imx-sdma.c | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 5969df8..cfcd413 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -476,6 +476,13 @@ struct sdma_driver_data {
 	int num_events;
 	struct sdma_script_start_addrs	*script_addrs;
 	bool check_ratio;
+	/*
+	 * ecspi ERR009165 fixed should be done in sdma script
+	 * and it has been fixed in soc from i.mx6ul.
+	 * please get more information from the below link:
+	 * https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
+	 */
+	bool ecspi_fixed;
 };
 
 struct sdma_engine {
@@ -596,6 +603,13 @@ static struct sdma_driver_data sdma_imx6q = {
 	.script_addrs = &sdma_script_imx6q,
 };
 
+static struct sdma_driver_data sdma_imx6ul = {
+	.chnenbl0 = SDMA_CHNENBL0_IMX35,
+	.num_events = 48,
+	.script_addrs = &sdma_script_imx6q,
+	.ecspi_fixed = true,
+};
+
 static struct sdma_script_start_addrs sdma_script_imx7d = {
 	.ap_2_ap_addr = 644,
 	.uart_2_mcu_addr = 819,
@@ -629,6 +643,7 @@ static const struct of_device_id sdma_dt_ids[] = {
 	{ .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
 	{ .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, },
 	{ .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, },
+	{ .compatible = "fsl,imx6ul-sdma", .data = &sdma_imx6ul, },
 	{ .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx8mq, },
 	{ /* sentinel */ }
 };
@@ -948,8 +963,15 @@ static void sdma_get_pc(struct sdma_channel *sdmac,
 		break;
 	case IMX_DMATYPE_CSPI:
 		per_2_emi = sdma->script_addrs->app_2_mcu_addr;
-		emi_2_per = sdma->script_addrs->mcu_2_ecspi_addr;
-		sdmac->is_ram_script = true;
+
+		/* Use rom script mcu_2_app if ERR009165 fixed */
+		if (sdmac->sdma->drvdata->ecspi_fixed) {
+			emi_2_per = sdma->script_addrs->mcu_2_app_addr;
+		} else {
+			emi_2_per = sdma->script_addrs->mcu_2_ecspi_addr;
+			sdmac->is_ram_script = true;
+		}
+
 		break;
 	case IMX_DMATYPE_EXT:
 	case IMX_DMATYPE_SSI:
-- 
2.7.4