diff mbox series

[v2,2/3] dmaengine: dw-axi-dmac: Add support for StarFive JH7110 DMA

Message ID 20230221140424.719-3-walker.chen@starfivetech.com
State New
Headers show
Series [v2,1/3] dt-bindings: dma: snps,dw-axi-dmac: Add reset items | expand

Commit Message

Walker Chen Feb. 21, 2023, 2:04 p.m. UTC
Add DMA reset operation in device probe and use different configuration
on CH_CFG registers according to compatible string.

Signed-off-by: Walker Chen <walker.chen@starfivetech.com>
---
 .../dma/dw-axi-dmac/dw-axi-dmac-platform.c    | 19 +++++++++++++++++--
 drivers/dma/dw-axi-dmac/dw-axi-dmac.h         |  3 +++
 2 files changed, 20 insertions(+), 2 deletions(-)

Comments

Emil Renner Berthing Feb. 26, 2023, 2:25 p.m. UTC | #1
On Tue, 21 Feb 2023 at 15:04, Walker Chen <walker.chen@starfivetech.com> wrote:
>
> Add DMA reset operation in device probe and use different configuration
> on CH_CFG registers according to compatible string.
>
> Signed-off-by: Walker Chen <walker.chen@starfivetech.com>
> ---
>  .../dma/dw-axi-dmac/dw-axi-dmac-platform.c    | 19 +++++++++++++++++--
>  drivers/dma/dw-axi-dmac/dw-axi-dmac.h         |  3 +++
>  2 files changed, 20 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> index bf85aa0979ec..858c4337650f 100644
> --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> @@ -25,6 +25,7 @@
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/property.h>
> +#include <linux/reset.h>
>  #include <linux/slab.h>
>  #include <linux/types.h>
>
> @@ -86,7 +87,8 @@ static inline void axi_chan_config_write(struct axi_dma_chan *chan,
>
>         cfg_lo = (config->dst_multblk_type << CH_CFG_L_DST_MULTBLK_TYPE_POS |
>                   config->src_multblk_type << CH_CFG_L_SRC_MULTBLK_TYPE_POS);
> -       if (chan->chip->dw->hdata->reg_map_8_channels) {
> +       if (chan->chip->dw->hdata->reg_map_8_channels &&
> +           !chan->chip->dw->hdata->use_cfg2) {
>                 cfg_hi = config->tt_fc << CH_CFG_H_TT_FC_POS |
>                          config->hs_sel_src << CH_CFG_H_HS_SEL_SRC_POS |
>                          config->hs_sel_dst << CH_CFG_H_HS_SEL_DST_POS |
> @@ -1142,7 +1144,7 @@ static int dma_chan_terminate_all(struct dma_chan *dchan)
>         axi_chan_disable(chan);
>
>         ret = readl_poll_timeout_atomic(chan->chip->regs + DMAC_CHEN, val,
> -                                       !(val & chan_active), 1000, 10000);
> +                                       !(val & chan_active), 1000, DMAC_TIMEOUT_US);
>         if (ret == -ETIMEDOUT)
>                 dev_warn(dchan2dev(dchan),
>                          "%s failed to stop\n", axi_chan_name(chan));
> @@ -1416,6 +1418,18 @@ static int dw_probe(struct platform_device *pdev)
>         if (IS_ERR(chip->cfgr_clk))
>                 return PTR_ERR(chip->cfgr_clk);
>
> +       if (of_device_is_compatible(node, "starfive,jh7110-axi-dma")) {
> +               chip->resets = devm_reset_control_array_get_exclusive(&pdev->dev);
> +               if (IS_ERR(chip->resets))
> +                       return PTR_ERR(chip->resets);
> +
> +               ret = reset_control_deassert(chip->resets);
> +               if (ret)
> +                       return ret;
> +
> +               chip->dw->hdata->use_cfg2 = true;
> +       }
> +

In the future it would be great to use match data rather than all the
calls to of_device_is_compatible.

>         ret = parse_device_properties(chip);
>         if (ret)
>                 return ret;
> @@ -1560,6 +1574,7 @@ static const struct dev_pm_ops dw_axi_dma_pm_ops = {
>  static const struct of_device_id dw_dma_of_id_table[] = {
>         { .compatible = "snps,axi-dma-1.01a" },
>         { .compatible = "intel,kmb-axi-dma" },
> +       { .compatible = "starfive,jh7110-axi-dma" },
>         {}
>  };
>  MODULE_DEVICE_TABLE(of, dw_dma_of_id_table);
> diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
> index e9d5eb0fd594..761d95691c02 100644
> --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
> +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
> @@ -21,6 +21,7 @@
>  #define DMAC_MAX_CHANNELS      16
>  #define DMAC_MAX_MASTERS       2
>  #define DMAC_MAX_BLK_SIZE      0x200000
> +#define DMAC_TIMEOUT_US                200000
>
>  struct dw_axi_dma_hcfg {
>         u32     nr_channels;
> @@ -33,6 +34,7 @@ struct dw_axi_dma_hcfg {
>         /* Register map for DMAX_NUM_CHANNELS <= 8 */
>         bool    reg_map_8_channels;
>         bool    restrict_axi_burst_len;
> +       bool    use_cfg2;
>  };
>
>  struct axi_dma_chan {
> @@ -70,6 +72,7 @@ struct axi_dma_chip {
>         struct clk              *core_clk;
>         struct clk              *cfgr_clk;
>         struct dw_axi_dma       *dw;
> +       struct reset_control    *resets;

This added field only seems to be written, but not read from anywhere.
With that fixed:

Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>

>  };
>
>  /* LLI == Linked List Item */
> --
> 2.17.1
>
Walker Chen Feb. 27, 2023, 9:27 a.m. UTC | #2
On 2023/2/26 22:25, Emil Renner Berthing wrote:
> On Tue, 21 Feb 2023 at 15:04, Walker Chen <walker.chen@starfivetech.com> wrote:
>>
>> Add DMA reset operation in device probe and use different configuration
>> on CH_CFG registers according to compatible string.
>>
>> Signed-off-by: Walker Chen <walker.chen@starfivetech.com>
>> ---
>>  .../dma/dw-axi-dmac/dw-axi-dmac-platform.c    | 19 +++++++++++++++++--
>>  drivers/dma/dw-axi-dmac/dw-axi-dmac.h         |  3 +++
>>  2 files changed, 20 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
>> index bf85aa0979ec..858c4337650f 100644
>> --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
>> +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
>> @@ -25,6 +25,7 @@
>>  #include <linux/platform_device.h>
>>  #include <linux/pm_runtime.h>
>>  #include <linux/property.h>
>> +#include <linux/reset.h>
>>  #include <linux/slab.h>
>>  #include <linux/types.h>
>>
>> @@ -86,7 +87,8 @@ static inline void axi_chan_config_write(struct axi_dma_chan *chan,
>>
>>         cfg_lo = (config->dst_multblk_type << CH_CFG_L_DST_MULTBLK_TYPE_POS |
>>                   config->src_multblk_type << CH_CFG_L_SRC_MULTBLK_TYPE_POS);
>> -       if (chan->chip->dw->hdata->reg_map_8_channels) {
>> +       if (chan->chip->dw->hdata->reg_map_8_channels &&
>> +           !chan->chip->dw->hdata->use_cfg2) {
>>                 cfg_hi = config->tt_fc << CH_CFG_H_TT_FC_POS |
>>                          config->hs_sel_src << CH_CFG_H_HS_SEL_SRC_POS |
>>                          config->hs_sel_dst << CH_CFG_H_HS_SEL_DST_POS |
>> @@ -1142,7 +1144,7 @@ static int dma_chan_terminate_all(struct dma_chan *dchan)
>>         axi_chan_disable(chan);
>>
>>         ret = readl_poll_timeout_atomic(chan->chip->regs + DMAC_CHEN, val,
>> -                                       !(val & chan_active), 1000, 10000);
>> +                                       !(val & chan_active), 1000, DMAC_TIMEOUT_US);
>>         if (ret == -ETIMEDOUT)
>>                 dev_warn(dchan2dev(dchan),
>>                          "%s failed to stop\n", axi_chan_name(chan));
>> @@ -1416,6 +1418,18 @@ static int dw_probe(struct platform_device *pdev)
>>         if (IS_ERR(chip->cfgr_clk))
>>                 return PTR_ERR(chip->cfgr_clk);
>>
>> +       if (of_device_is_compatible(node, "starfive,jh7110-axi-dma")) {
>> +               chip->resets = devm_reset_control_array_get_exclusive(&pdev->dev);
>> +               if (IS_ERR(chip->resets))
>> +                       return PTR_ERR(chip->resets);
>> +
>> +               ret = reset_control_deassert(chip->resets);
>> +               if (ret)
>> +                       return ret;
>> +
>> +               chip->dw->hdata->use_cfg2 = true;
>> +       }
>> +
> 
> In the future it would be great to use match data rather than all the
> calls to of_device_is_compatible.

Thanks, about this point, I will follow your advice.

> 
>>         ret = parse_device_properties(chip);
>>         if (ret)
>>                 return ret;
>> @@ -1560,6 +1574,7 @@ static const struct dev_pm_ops dw_axi_dma_pm_ops = {
>>  static const struct of_device_id dw_dma_of_id_table[] = {
>>         { .compatible = "snps,axi-dma-1.01a" },
>>         { .compatible = "intel,kmb-axi-dma" },
>> +       { .compatible = "starfive,jh7110-axi-dma" },
>>         {}
>>  };
>>  MODULE_DEVICE_TABLE(of, dw_dma_of_id_table);
>> diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
>> index e9d5eb0fd594..761d95691c02 100644
>> --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
>> +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
>> @@ -21,6 +21,7 @@
>>  #define DMAC_MAX_CHANNELS      16
>>  #define DMAC_MAX_MASTERS       2
>>  #define DMAC_MAX_BLK_SIZE      0x200000
>> +#define DMAC_TIMEOUT_US                200000
>>
>>  struct dw_axi_dma_hcfg {
>>         u32     nr_channels;
>> @@ -33,6 +34,7 @@ struct dw_axi_dma_hcfg {
>>         /* Register map for DMAX_NUM_CHANNELS <= 8 */
>>         bool    reg_map_8_channels;
>>         bool    restrict_axi_burst_len;
>> +       bool    use_cfg2;
>>  };
>>
>>  struct axi_dma_chan {
>> @@ -70,6 +72,7 @@ struct axi_dma_chip {
>>         struct clk              *core_clk;
>>         struct clk              *cfgr_clk;
>>         struct dw_axi_dma       *dw;
>> +       struct reset_control    *resets;
> 
> This added field only seems to be written, but not read from anywhere.

Reset initialization will be encapsulated in match data.

> With that fixed:
> 
> Reviewed-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>

Thanks for your review and comment very much!

Best regards,
Walker
diff mbox series

Patch

diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
index bf85aa0979ec..858c4337650f 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
@@ -25,6 +25,7 @@ 
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/property.h>
+#include <linux/reset.h>
 #include <linux/slab.h>
 #include <linux/types.h>
 
@@ -86,7 +87,8 @@  static inline void axi_chan_config_write(struct axi_dma_chan *chan,
 
 	cfg_lo = (config->dst_multblk_type << CH_CFG_L_DST_MULTBLK_TYPE_POS |
 		  config->src_multblk_type << CH_CFG_L_SRC_MULTBLK_TYPE_POS);
-	if (chan->chip->dw->hdata->reg_map_8_channels) {
+	if (chan->chip->dw->hdata->reg_map_8_channels &&
+	    !chan->chip->dw->hdata->use_cfg2) {
 		cfg_hi = config->tt_fc << CH_CFG_H_TT_FC_POS |
 			 config->hs_sel_src << CH_CFG_H_HS_SEL_SRC_POS |
 			 config->hs_sel_dst << CH_CFG_H_HS_SEL_DST_POS |
@@ -1142,7 +1144,7 @@  static int dma_chan_terminate_all(struct dma_chan *dchan)
 	axi_chan_disable(chan);
 
 	ret = readl_poll_timeout_atomic(chan->chip->regs + DMAC_CHEN, val,
-					!(val & chan_active), 1000, 10000);
+					!(val & chan_active), 1000, DMAC_TIMEOUT_US);
 	if (ret == -ETIMEDOUT)
 		dev_warn(dchan2dev(dchan),
 			 "%s failed to stop\n", axi_chan_name(chan));
@@ -1416,6 +1418,18 @@  static int dw_probe(struct platform_device *pdev)
 	if (IS_ERR(chip->cfgr_clk))
 		return PTR_ERR(chip->cfgr_clk);
 
+	if (of_device_is_compatible(node, "starfive,jh7110-axi-dma")) {
+		chip->resets = devm_reset_control_array_get_exclusive(&pdev->dev);
+		if (IS_ERR(chip->resets))
+			return PTR_ERR(chip->resets);
+
+		ret = reset_control_deassert(chip->resets);
+		if (ret)
+			return ret;
+
+		chip->dw->hdata->use_cfg2 = true;
+	}
+
 	ret = parse_device_properties(chip);
 	if (ret)
 		return ret;
@@ -1560,6 +1574,7 @@  static const struct dev_pm_ops dw_axi_dma_pm_ops = {
 static const struct of_device_id dw_dma_of_id_table[] = {
 	{ .compatible = "snps,axi-dma-1.01a" },
 	{ .compatible = "intel,kmb-axi-dma" },
+	{ .compatible = "starfive,jh7110-axi-dma" },
 	{}
 };
 MODULE_DEVICE_TABLE(of, dw_dma_of_id_table);
diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
index e9d5eb0fd594..761d95691c02 100644
--- a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
+++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h
@@ -21,6 +21,7 @@ 
 #define DMAC_MAX_CHANNELS	16
 #define DMAC_MAX_MASTERS	2
 #define DMAC_MAX_BLK_SIZE	0x200000
+#define DMAC_TIMEOUT_US		200000
 
 struct dw_axi_dma_hcfg {
 	u32	nr_channels;
@@ -33,6 +34,7 @@  struct dw_axi_dma_hcfg {
 	/* Register map for DMAX_NUM_CHANNELS <= 8 */
 	bool	reg_map_8_channels;
 	bool	restrict_axi_burst_len;
+	bool	use_cfg2;
 };
 
 struct axi_dma_chan {
@@ -70,6 +72,7 @@  struct axi_dma_chip {
 	struct clk		*core_clk;
 	struct clk		*cfgr_clk;
 	struct dw_axi_dma	*dw;
+	struct reset_control	*resets;
 };
 
 /* LLI == Linked List Item */