linux-kernel - [PATCH v6 01/12] dmaengine: qcom: bam_dma: Add bam_sw

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Message-ID: <20250115103004.3350561-2-quic_mdalam@quicinc.com>
Date: Wed, 15 Jan 2025 15:59:53 +0530
From: Md Sadre Alam <quic_mdalam@...cinc.com>
To: <vkoul@...nel.org>, <corbet@....net>, <thara.gopinath@...il.com>,
        <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <martin.petersen@...cle.com>, <enghua.yu@...el.com>,
        <u.kleine-koenig@...libre.com>, <dmaengine@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-crypto@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
CC: <quic_mdalam@...cinc.com>, <quic_utiwari@...cinc.com>,
        <quic_srichara@...cinc.com>, <quic_varada@...cinc.com>
Subject: [PATCH v6 01/12] dmaengine: qcom: bam_dma: Add bam_sw_version register read

Add bam_sw_version register read. This will help to
differentiate b/w some new BAM features across multiple
BAM IP, feature like LOCK/UNLOCK of BAM pipe.

Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
---

change in [v6]

* No change

change in [v5]

* No change

change in [v4]

* Added BAM_SW_VERSION register read

change in [v3]

* This patch was not included in [v3]

change in [v2]

* This patch was not included in [v2]

change in [v1]

* This patch was not included in [v1]

 drivers/dma/qcom/bam_dma.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index c14557efd577..daeacd5cb8e9 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c
@@ -83,6 +83,7 @@ struct bam_async_desc {
 enum bam_reg {
 	BAM_CTRL,
 	BAM_REVISION,
+	BAM_SW_VERSION,
 	BAM_NUM_PIPES,
 	BAM_DESC_CNT_TRSHLD,
 	BAM_IRQ_SRCS,
@@ -117,6 +118,7 @@ struct reg_offset_data {
 static const struct reg_offset_data bam_v1_3_reg_info[] = {
 	[BAM_CTRL]		= { 0x0F80, 0x00, 0x00, 0x00 },
 	[BAM_REVISION]		= { 0x0F84, 0x00, 0x00, 0x00 },
+	[BAM_SW_VERSION]	= { 0x0F88, 0x00, 0x00, 0x00 },
 	[BAM_NUM_PIPES]		= { 0x0FBC, 0x00, 0x00, 0x00 },
 	[BAM_DESC_CNT_TRSHLD]	= { 0x0F88, 0x00, 0x00, 0x00 },
 	[BAM_IRQ_SRCS]		= { 0x0F8C, 0x00, 0x00, 0x00 },
@@ -146,6 +148,7 @@ static const struct reg_offset_data bam_v1_3_reg_info[] = {
 static const struct reg_offset_data bam_v1_4_reg_info[] = {
 	[BAM_CTRL]		= { 0x0000, 0x00, 0x00, 0x00 },
 	[BAM_REVISION]		= { 0x0004, 0x00, 0x00, 0x00 },
+	[BAM_SW_VERSION]	= { 0x0008, 0x00, 0x00, 0x00 },
 	[BAM_NUM_PIPES]		= { 0x003C, 0x00, 0x00, 0x00 },
 	[BAM_DESC_CNT_TRSHLD]	= { 0x0008, 0x00, 0x00, 0x00 },
 	[BAM_IRQ_SRCS]		= { 0x000C, 0x00, 0x00, 0x00 },
@@ -175,6 +178,7 @@ static const struct reg_offset_data bam_v1_4_reg_info[] = {
 static const struct reg_offset_data bam_v1_7_reg_info[] = {
 	[BAM_CTRL]		= { 0x00000, 0x00, 0x00, 0x00 },
 	[BAM_REVISION]		= { 0x01000, 0x00, 0x00, 0x00 },
+	[BAM_SW_VERSION]	= { 0x01004, 0x00, 0x00, 0x00 },
 	[BAM_NUM_PIPES]		= { 0x01008, 0x00, 0x00, 0x00 },
 	[BAM_DESC_CNT_TRSHLD]	= { 0x00008, 0x00, 0x00, 0x00 },
 	[BAM_IRQ_SRCS]		= { 0x03010, 0x00, 0x00, 0x00 },
@@ -393,6 +397,7 @@ struct bam_device {
 	bool controlled_remotely;
 	bool powered_remotely;
 	u32 active_channels;
+	u32 bam_sw_version;
 
 	const struct reg_offset_data *layout;
 
@@ -1306,6 +1311,9 @@ static int bam_dma_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	bdev->bam_sw_version = readl_relaxed(bam_addr(bdev, 0, BAM_SW_VERSION));
+	dev_info(bdev->dev, "BAM software version:0x%08x\n", bdev->bam_sw_version);
+
 	ret = bam_init(bdev);
 	if (ret)
 		goto err_disable_clk;
-- 
2.34.1