diff mbox series

[net-next,2/3] net: stmmac: dwmac-oxnas: Add support for OX810SE

Message ID 20220103175638.89625-3-narmstrong@baylibre.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series ARM: ox810se: Add Ethernet support | expand

Commit Message

Neil Armstrong Jan. 3, 2022, 5:56 p.m. UTC 
Add support for OX810SE dwmac glue setup, which is a simplified version
of the OX820 introduced later with more control on the PHY interface.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-oxnas.c | 92 ++++++++++++++-----
 1 file changed, 70 insertions(+), 22 deletions(-)

Comments

Neil Armstrong Jan. 4, 2022, 8:42 a.m. UTC | #1 
On 03/01/2022 18:56, Neil Armstrong wrote:
> Add support for OX810SE dwmac glue setup, which is a simplified version
> of the OX820 introduced later with more control on the PHY interface.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  .../net/ethernet/stmicro/stmmac/dwmac-oxnas.c | 92 ++++++++++++++-----
>  1 file changed, 70 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
> index adfeb8d3293d..7ffa4a4eb30f 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
> @@ -12,6 +12,7 @@
>  #include <linux/io.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
>  #include <linux/mfd/syscon.h>
> @@ -48,12 +49,58 @@
>  #define DWMAC_RX_VARDELAY(d)		((d) << DWMAC_RX_VARDELAY_SHIFT)
>  #define DWMAC_RXN_VARDELAY(d)		((d) << DWMAC_RXN_VARDELAY_SHIFT)
>  
> +struct oxnas_dwmac;
> +
> +struct oxnas_dwmac_data {
> +	void (*setup)(struct oxnas_dwmac *dwmac);
> +};
> +
>  struct oxnas_dwmac {
>  	struct device	*dev;
>  	struct clk	*clk;
>  	struct regmap	*regmap;
> +	const struct oxnas_dwmac_data	*data;
>  };
>  
> +static void oxnas_dwmac_setup_ox810se(struct oxnas_dwmac *dwmac)
> +{
> +	unsigned int value;
> +
> +	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
> +	value = BIT(DWMAC_CKEN_GTX)		|
> +		 /* Use simple mux for 25/125 Mhz clock switching */
> +		 BIT(DWMAC_SIMPLE_MUX);
> +
> +	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
> +}
> +
> +static void oxnas_dwmac_setup_ox820(struct oxnas_dwmac *dwmac)
> +{
> +	unsigned int value;
> +
> +	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
> +	value = BIT(DWMAC_CKEN_GTX)		|
> +		 /* Use simple mux for 25/125 Mhz clock switching */
> +		BIT(DWMAC_SIMPLE_MUX)		|
> +		/* set auto switch tx clock source */
> +		BIT(DWMAC_AUTO_TX_SOURCE)	|
> +		/* enable tx & rx vardelay */
> +		BIT(DWMAC_CKEN_TX_OUT)		|
> +		BIT(DWMAC_CKEN_TXN_OUT)	|
> +		BIT(DWMAC_CKEN_TX_IN)		|
> +		BIT(DWMAC_CKEN_RX_OUT)		|
> +		BIT(DWMAC_CKEN_RXN_OUT)	|
> +		BIT(DWMAC_CKEN_RX_IN);
> +	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
> +
> +	/* set tx & rx vardelay */
> +	value = DWMAC_TX_VARDELAY(4)	|
> +		DWMAC_TXN_VARDELAY(2)	|
> +		DWMAC_RX_VARDELAY(10)	|
> +		DWMAC_RXN_VARDELAY(8);
> +	regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
> +}
> +
>  static int oxnas_dwmac_init(struct platform_device *pdev, void *priv)
>  {
>  	struct oxnas_dwmac *dwmac = priv;
> @@ -75,27 +122,7 @@ static int oxnas_dwmac_init(struct platform_device *pdev, void *priv)
>  		return ret;
>  	}

There's an issue with the patch, the value read from register is not used, I'll send a V2 with the fix.

Neil

>  
> -	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
> -	value |= BIT(DWMAC_CKEN_GTX)		|
> -		 /* Use simple mux for 25/125 Mhz clock switching */
> -		 BIT(DWMAC_SIMPLE_MUX)		|
> -		 /* set auto switch tx clock source */
> -		 BIT(DWMAC_AUTO_TX_SOURCE)	|
> -		 /* enable tx & rx vardelay */
> -		 BIT(DWMAC_CKEN_TX_OUT)		|
> -		 BIT(DWMAC_CKEN_TXN_OUT)	|
> -		 BIT(DWMAC_CKEN_TX_IN)		|
> -		 BIT(DWMAC_CKEN_RX_OUT)		|
> -		 BIT(DWMAC_CKEN_RXN_OUT)	|
> -		 BIT(DWMAC_CKEN_RX_IN);
> -	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
> -
> -	/* set tx & rx vardelay */
> -	value = DWMAC_TX_VARDELAY(4)	|
> -		DWMAC_TXN_VARDELAY(2)	|
> -		DWMAC_RX_VARDELAY(10)	|
> -		DWMAC_RXN_VARDELAY(8);
> -	regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
> +	dwmac->data->setup(dwmac);
>  
>  	return 0;
>  }
> @@ -128,6 +155,12 @@ static int oxnas_dwmac_probe(struct platform_device *pdev)
>  		goto err_remove_config_dt;
>  	}
>  
> +	dwmac->data = (const struct oxnas_dwmac_data *)of_device_get_match_data(&pdev->dev);
> +	if (!dwmac->data) {
> +		ret = -EINVAL;
> +		goto err_remove_config_dt;
> +	}
> +
>  	dwmac->dev = &pdev->dev;
>  	plat_dat->bsp_priv = dwmac;
>  	plat_dat->init = oxnas_dwmac_init;
> @@ -166,8 +199,23 @@ static int oxnas_dwmac_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> +static const struct oxnas_dwmac_data ox810se_dwmac_data = {
> +	.setup = oxnas_dwmac_setup_ox810se,
> +};
> +
> +static const struct oxnas_dwmac_data ox820_dwmac_data = {
> +	.setup = oxnas_dwmac_setup_ox820,
> +};
> +
>  static const struct of_device_id oxnas_dwmac_match[] = {
> -	{ .compatible = "oxsemi,ox820-dwmac" },
> +	{
> +		.compatible = "oxsemi,ox810se-dwmac",
> +		.data = &ox810se_dwmac_data,
> +	},
> +	{
> +		.compatible = "oxsemi,ox820-dwmac",
> +		.data = &ox820_dwmac_data,
> +	},
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, oxnas_dwmac_match);
>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
index adfeb8d3293d..7ffa4a4eb30f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
@@ -12,6 +12,7 @@ 
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
@@ -48,12 +49,58 @@ 
 #define DWMAC_RX_VARDELAY(d)		((d) << DWMAC_RX_VARDELAY_SHIFT)
 #define DWMAC_RXN_VARDELAY(d)		((d) << DWMAC_RXN_VARDELAY_SHIFT)
 
+struct oxnas_dwmac;
+
+struct oxnas_dwmac_data {
+	void (*setup)(struct oxnas_dwmac *dwmac);
+};
+
 struct oxnas_dwmac {
 	struct device	*dev;
 	struct clk	*clk;
 	struct regmap	*regmap;
+	const struct oxnas_dwmac_data	*data;
 };
 
+static void oxnas_dwmac_setup_ox810se(struct oxnas_dwmac *dwmac)
+{
+	unsigned int value;
+
+	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
+	value = BIT(DWMAC_CKEN_GTX)		|
+		 /* Use simple mux for 25/125 Mhz clock switching */
+		 BIT(DWMAC_SIMPLE_MUX);
+
+	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
+}
+
+static void oxnas_dwmac_setup_ox820(struct oxnas_dwmac *dwmac)
+{
+	unsigned int value;
+
+	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
+	value = BIT(DWMAC_CKEN_GTX)		|
+		 /* Use simple mux for 25/125 Mhz clock switching */
+		BIT(DWMAC_SIMPLE_MUX)		|
+		/* set auto switch tx clock source */
+		BIT(DWMAC_AUTO_TX_SOURCE)	|
+		/* enable tx & rx vardelay */
+		BIT(DWMAC_CKEN_TX_OUT)		|
+		BIT(DWMAC_CKEN_TXN_OUT)	|
+		BIT(DWMAC_CKEN_TX_IN)		|
+		BIT(DWMAC_CKEN_RX_OUT)		|
+		BIT(DWMAC_CKEN_RXN_OUT)	|
+		BIT(DWMAC_CKEN_RX_IN);
+	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
+
+	/* set tx & rx vardelay */
+	value = DWMAC_TX_VARDELAY(4)	|
+		DWMAC_TXN_VARDELAY(2)	|
+		DWMAC_RX_VARDELAY(10)	|
+		DWMAC_RXN_VARDELAY(8);
+	regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
+}
+
 static int oxnas_dwmac_init(struct platform_device *pdev, void *priv)
 {
 	struct oxnas_dwmac *dwmac = priv;
@@ -75,27 +122,7 @@  static int oxnas_dwmac_init(struct platform_device *pdev, void *priv)
 		return ret;
 	}
 
-	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
-	value |= BIT(DWMAC_CKEN_GTX)		|
-		 /* Use simple mux for 25/125 Mhz clock switching */
-		 BIT(DWMAC_SIMPLE_MUX)		|
-		 /* set auto switch tx clock source */
-		 BIT(DWMAC_AUTO_TX_SOURCE)	|
-		 /* enable tx & rx vardelay */
-		 BIT(DWMAC_CKEN_TX_OUT)		|
-		 BIT(DWMAC_CKEN_TXN_OUT)	|
-		 BIT(DWMAC_CKEN_TX_IN)		|
-		 BIT(DWMAC_CKEN_RX_OUT)		|
-		 BIT(DWMAC_CKEN_RXN_OUT)	|
-		 BIT(DWMAC_CKEN_RX_IN);
-	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
-
-	/* set tx & rx vardelay */
-	value = DWMAC_TX_VARDELAY(4)	|
-		DWMAC_TXN_VARDELAY(2)	|
-		DWMAC_RX_VARDELAY(10)	|
-		DWMAC_RXN_VARDELAY(8);
-	regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
+	dwmac->data->setup(dwmac);
 
 	return 0;
 }
@@ -128,6 +155,12 @@  static int oxnas_dwmac_probe(struct platform_device *pdev)
 		goto err_remove_config_dt;
 	}
 
+	dwmac->data = (const struct oxnas_dwmac_data *)of_device_get_match_data(&pdev->dev);
+	if (!dwmac->data) {
+		ret = -EINVAL;
+		goto err_remove_config_dt;
+	}
+
 	dwmac->dev = &pdev->dev;
 	plat_dat->bsp_priv = dwmac;
 	plat_dat->init = oxnas_dwmac_init;
@@ -166,8 +199,23 @@  static int oxnas_dwmac_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static const struct oxnas_dwmac_data ox810se_dwmac_data = {
+	.setup = oxnas_dwmac_setup_ox810se,
+};
+
+static const struct oxnas_dwmac_data ox820_dwmac_data = {
+	.setup = oxnas_dwmac_setup_ox820,
+};
+
 static const struct of_device_id oxnas_dwmac_match[] = {
-	{ .compatible = "oxsemi,ox820-dwmac" },
+	{
+		.compatible = "oxsemi,ox810se-dwmac",
+		.data = &ox810se_dwmac_data,
+	},
+	{
+		.compatible = "oxsemi,ox820-dwmac",
+		.data = &ox820_dwmac_data,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, oxnas_dwmac_match);