[PATCH v5 01/12] dmaengine: qcom: bam_dma: Add bam_sw_version register read

Md Sadre Alam
2024-12-12T04:17:11Z

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@quicinc.com>
---

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 bbc3276992bb..3980c9d501c3 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c
@@ -80,6 +80,7 @@ struct bam_async_desc {
enum bam_reg {
BAM_CTRL,
BAM_REVISION,
+ BAM_SW_VERSION,
BAM_NUM_PIPES,
BAM_DESC_CNT_TRSHLD,
BAM_IRQ_SRCS,
@@ -114,6 +115,7 @@ 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 },
@@ -143,6 +145,7 @@ 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 },
@@ -172,6 +175,7 @@ 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 },
@@ -390,6 +394,7 @@ struct bam_device {
bool controlled_remotely;
bool powered_remotely;
u32 active_channels;
+ u32 bam_sw_version;

const struct reg_offset_data *layout;

@@ -1298,6 +1303,9 @@ 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