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* [v3] dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
@ 2019-12-09  9:02 Peng Ma
  2019-12-09  9:15 ` Robin Gong
  0 siblings, 1 reply; 2+ messages in thread
From: Peng Ma @ 2019-12-09  9:02 UTC (permalink / raw)
  To: vkoul, dan.j.williams, Leo Li, Robin Gong
  Cc: dmaengine, linux-kernel, Peng Ma

Our platforms(such as LS1021A, LS1012A, LS1043A, LS1046A, LS1028A) with
below registers(CHCFG0 - CHCFG15) of eDMA as follows:
*-----------------------------------------------------------*
|     Offset   |	OTHERS      |		LS1028A	    |
|--------------|--------------------|-----------------------|
|     0x0      |        CHCFG0      |           CHCFG3      |
|--------------|--------------------|-----------------------|
|     0x1      |        CHCFG1      |           CHCFG2      |
|--------------|--------------------|-----------------------|
|     0x2      |        CHCFG2      |           CHCFG1      |
|--------------|--------------------|-----------------------|
|     0x3      |        CHCFG3      |           CHCFG0      |
|--------------|--------------------|-----------------------|
|     ...      |        ......      |           ......      |
|--------------|--------------------|-----------------------|
|     0xC      |        CHCFG12     |           CHCFG15     |
|--------------|--------------------|-----------------------|
|     0xD      |        CHCFG13     |           CHCFG14     |
|--------------|--------------------|-----------------------|
|     0xE      |        CHCFG14     |           CHCFG13     |
|--------------|--------------------|-----------------------|
|     0xF      |        CHCFG15     |           CHCFG12     |
*-----------------------------------------------------------*

This patch is to improve edma driver to fit LS1028A platform.

Signed-off-by: Peng Ma <peng.ma@nxp.com>
---
Changed for v3:
	- Rename struct soc_device_attribute

 drivers/dma/fsl-edma-common.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index b1a7ca9..10234e1 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -7,6 +7,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/dma-mapping.h>
+#include <linux/sys_soc.h>
 
 #include "fsl-edma-common.h"
 
@@ -42,6 +43,11 @@
 
 #define EDMA_TCD		0x1000
 
+static struct soc_device_attribute mux_byte_swap_quirk[] = {
+	{ .family = "QorIQ LS1028A"},
+	{ },
+};
+
 static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)
 {
 	struct edma_regs *regs = &fsl_chan->edma->regs;
@@ -109,10 +115,16 @@ void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
 	u32 ch = fsl_chan->vchan.chan.chan_id;
 	void __iomem *muxaddr;
 	unsigned int chans_per_mux, ch_off;
+	int endian_diff[4] = {3, 1, -1, -3};
 	u32 dmamux_nr = fsl_chan->edma->drvdata->dmamuxs;
 
 	chans_per_mux = fsl_chan->edma->n_chans / dmamux_nr;
 	ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux;
+
+	if (!fsl_chan->edma->big_endian &&
+	    soc_device_match(mux_byte_swap_quirk))
+		ch_off += endian_diff[ch_off % 4];
+
 	muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux];
 	slot = EDMAMUX_CHCFG_SOURCE(slot);
 
-- 
2.9.5


^ permalink raw reply related	[flat|nested] 2+ messages in thread
* RE: [v3] dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform
  2019-12-09  9:02 [v3] dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform Peng Ma
@ 2019-12-09  9:15 ` Robin Gong
  0 siblings, 0 replies; 2+ messages in thread
From: Robin Gong @ 2019-12-09  9:15 UTC (permalink / raw)
  To: Peng Ma, vkoul, dan.j.williams, Leo Li; +Cc: dmaengine, linux-kernel

On 2019/12/9 17:03 Peng Ma <peng.ma@nxp.com> wrote:
> Our platforms(such as LS1021A, LS1012A, LS1043A, LS1046A, LS1028A) with
> below registers(CHCFG0 - CHCFG15) of eDMA as follows:
> *-----------------------------------------------------------*
> |     Offset   |	OTHERS      |		LS1028A	    |
> |--------------|--------------------|-----------------------|
> |     0x0      |        CHCFG0      |           CHCFG3      |
> |--------------|--------------------|-----------------------|
> |     0x1      |        CHCFG1      |           CHCFG2      |
> |--------------|--------------------|-----------------------|
> |     0x2      |        CHCFG2      |           CHCFG1      |
> |--------------|--------------------|-----------------------|
> |     0x3      |        CHCFG3      |           CHCFG0      |
> |--------------|--------------------|-----------------------|
> |     ...      |        ......      |           ......      |
> |--------------|--------------------|-----------------------|
> |     0xC      |        CHCFG12     |           CHCFG15     |
> |--------------|--------------------|-----------------------|
> |     0xD      |        CHCFG13     |           CHCFG14     |
> |--------------|--------------------|-----------------------|
> |     0xE      |        CHCFG14     |           CHCFG13     |
> |--------------|--------------------|-----------------------|
> |     0xF      |        CHCFG15     |           CHCFG12     |
> *-----------------------------------------------------------*
> 
> This patch is to improve edma driver to fit LS1028A platform.
> 
> Signed-off-by: Peng Ma <peng.ma@nxp.com>
> ---
> Changed for v3:
> 	- Rename struct soc_device_attribute
> 
>  drivers/dma/fsl-edma-common.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/dma/fsl-edma-common.c
> b/drivers/dma/fsl-edma-common.c index b1a7ca9..10234e1 100644
> --- a/drivers/dma/fsl-edma-common.c
> +++ b/drivers/dma/fsl-edma-common.c
> @@ -7,6 +7,7 @@
>  #include <linux/module.h>
>  #include <linux/slab.h>
>  #include <linux/dma-mapping.h>
> +#include <linux/sys_soc.h>
> 
>  #include "fsl-edma-common.h"
> 
> @@ -42,6 +43,11 @@
> 
>  #define EDMA_TCD		0x1000
> 
> +static struct soc_device_attribute mux_byte_swap_quirk[] = {
> +	{ .family = "QorIQ LS1028A"},
> +	{ },
> +};
> +
How about add 'mux_swap' into 'struct fsl_edma_drvdata' instead
of involving any soc type into the common fsl-edma-common.c? Then
soc type could be added into chip level driver fsl-edma.c like "fsl,vf610-edma"/
"fsl,imx7ulp-edma".

>  static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan)  {
>  	struct edma_regs *regs = &fsl_chan->edma->regs; @@ -109,10 +115,16
> @@ void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan,
>  	u32 ch = fsl_chan->vchan.chan.chan_id;
>  	void __iomem *muxaddr;
>  	unsigned int chans_per_mux, ch_off;
> +	int endian_diff[4] = {3, 1, -1, -3};
>  	u32 dmamux_nr = fsl_chan->edma->drvdata->dmamuxs;
> 
>  	chans_per_mux = fsl_chan->edma->n_chans / dmamux_nr;
>  	ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux;
> +
> +	if (!fsl_chan->edma->big_endian &&
> +	    soc_device_match(mux_byte_swap_quirk))
> +		ch_off += endian_diff[ch_off % 4];
> +
>  	muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux];
>  	slot = EDMAMUX_CHCFG_SOURCE(slot);
> 
> --
> 2.9.5


^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2019-12-09  9:16 UTC | newest]

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2019-12-09  9:02 [v3] dmaengine: fsl-edma: Add eDMA support for QorIQ LS1028A platform Peng Ma
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