diff mbox

[v4,5/7] net: cpsw: Add am33xx MACID readout

Message ID 1408600314-19824-6-git-send-email-mpa@pengutronix.de (mailing list archive)
State New, archived
Headers show

Commit Message

Markus Pargmann Aug. 21, 2014, 5:51 a.m. UTC 
This patch adds a function to get the MACIDs from the am33xx SoC
control module registers which hold unique vendor MACIDs. This is only
used if of_get_mac_address() fails to get a valid mac address.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
---
 Documentation/devicetree/bindings/net/cpsw.txt |  4 +++
 drivers/net/ethernet/ti/Kconfig                |  2 ++
 drivers/net/ethernet/ti/cpsw.c                 | 46 ++++++++++++++++++++++++--
 3 files changed, 50 insertions(+), 2 deletions(-)

Comments

Mugunthan V N Aug. 21, 2014, 9:21 a.m. UTC | #1 
On Thursday 21 August 2014 11:21 AM, Markus Pargmann wrote:
> This patch adds a function to get the MACIDs from the am33xx SoC
> control module registers which hold unique vendor MACIDs. This is only
> used if of_get_mac_address() fails to get a valid mac address.
>
> Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
> Tested-by: Steven Rostedt <rostedt@goodmis.org>
> ---
>  Documentation/devicetree/bindings/net/cpsw.txt |  4 +++
>  drivers/net/ethernet/ti/Kconfig                |  2 ++
>  drivers/net/ethernet/ti/cpsw.c                 | 46 ++++++++++++++++++++++++--
>  3 files changed, 50 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
> index 107caf174a0e..33fe8462edf4 100644
> --- a/Documentation/devicetree/bindings/net/cpsw.txt
> +++ b/Documentation/devicetree/bindings/net/cpsw.txt
> @@ -24,6 +24,8 @@ Optional properties:
>  - ti,hwmods		: Must be "cpgmac0"
>  - no_bd_ram		: Must be 0 or 1
>  - dual_emac		: Specifies Switch to act as Dual EMAC
> +- syscon		: Phandle to the system control device node, which is
> +			  the control module device of the am33x
>  
>  Slave Properties:
>  Required properties:
> @@ -57,6 +59,7 @@ Examples:
>  		active_slave = <0>;
>  		cpts_clock_mult = <0x80000000>;
>  		cpts_clock_shift = <29>;
> +		syscon = <&cm>;
>  		cpsw_emac0: slave@0 {
>  			phy_id = <&davinci_mdio>, <0>;
>  			phy-mode = "rgmii-txid";
> @@ -85,6 +88,7 @@ Examples:
>  		active_slave = <0>;
>  		cpts_clock_mult = <0x80000000>;
>  		cpts_clock_shift = <29>;
> +		syscon = <&cm>;
>  		cpsw_emac0: slave@0 {
>  			phy_id = <&davinci_mdio>, <0>;
>  			phy-mode = "rgmii-txid";
> diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
> index 1769700a6070..5d8cb7956113 100644
> --- a/drivers/net/ethernet/ti/Kconfig
> +++ b/drivers/net/ethernet/ti/Kconfig
> @@ -62,6 +62,8 @@ config TI_CPSW
>  	select TI_DAVINCI_CPDMA
>  	select TI_DAVINCI_MDIO
>  	select TI_CPSW_PHY_SEL
> +	select MFD_SYSCON
> +	select REGMAP
>  	---help---
>  	  This driver supports TI's CPSW Ethernet Switch.
>  
> diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
> index 0bc2c2a2c236..aaf8a42f9633 100644
> --- a/drivers/net/ethernet/ti/cpsw.c
> +++ b/drivers/net/ethernet/ti/cpsw.c
> @@ -33,6 +33,8 @@
>  #include <linux/of_net.h>
>  #include <linux/of_device.h>
>  #include <linux/if_vlan.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
>  
>  #include <linux/pinctrl/consumer.h>
>  
> @@ -1816,6 +1818,39 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
>  	slave->port_vlan = data->dual_emac_res_vlan;
>  }
>  
> +#define AM33XX_CTRL_MAC_LO_REG(id) (0x630 + 0x8 * id)
> +#define AM33XX_CTRL_MAC_HI_REG(id) (0x630 + 0x8 * id + 0x4)
> +
> +static int cpsw_am33xx_cm_get_macid(struct device *dev, int slave,
> +		u8 *mac_addr)
> +{
> +	u32 macid_lo;
> +	u32 macid_hi;
> +	struct regmap *syscon;
> +
> +	if (!of_machine_is_compatible("ti,am33xx"))
> +		return 0;
> +
> +	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
> +	if (IS_ERR(syscon)) {
> +		if (PTR_ERR(syscon) == -ENODEV)
> +			return 0;
> +		return PTR_ERR(syscon);
> +	}
> +
> +	regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(slave), &macid_lo);
> +	regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(slave), &macid_hi);
> +
> +	mac_addr[5] = (macid_lo >> 8) & 0xff;
> +	mac_addr[4] = macid_lo & 0xff;
> +	mac_addr[3] = (macid_hi >> 24) & 0xff;
> +	mac_addr[2] = (macid_hi >> 16) & 0xff;
> +	mac_addr[1] = (macid_hi >> 8) & 0xff;
> +	mac_addr[0] = macid_hi & 0xff;
> +
> +	return 0;
> +}
> +
>  static int cpsw_probe_dt(struct cpsw_platform_data *data,
>  			 struct platform_device *pdev)
>  {
> @@ -1928,8 +1963,15 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
>  			 PHY_ID_FMT, mdio->name, phyid);
>  
>  		mac_addr = of_get_mac_address(slave_node);
> -		if (mac_addr)
> -			memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
> +		if (mac_addr) {
> +			memcpy(slave_data->mac_addr, mac_addr,
> +					ETH_ALEN);

Alignment should match open parenthesis

> +		} else {
> +			ret = cpsw_am33xx_cm_get_macid(&pdev->dev, i,
> +					slave_data->mac_addr);
> +			if (ret)
> +				return ret;
> +		}
>  
>  		slave_data->phy_if = of_get_phy_mode(slave_node);
>  		if (slave_data->phy_if < 0) {

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Markus Pargmann Aug. 24, 2014, 3:44 p.m. UTC | #2 
On Thu, Aug 21, 2014 at 02:51:53PM +0530, Mugunthan V N wrote:
> On Thursday 21 August 2014 11:21 AM, Markus Pargmann wrote:
> > This patch adds a function to get the MACIDs from the am33xx SoC
> > control module registers which hold unique vendor MACIDs. This is only
> > used if of_get_mac_address() fails to get a valid mac address.
> >
> > Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> > Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
> > Tested-by: Steven Rostedt <rostedt@goodmis.org>
> > ---
> >  Documentation/devicetree/bindings/net/cpsw.txt |  4 +++
> >  drivers/net/ethernet/ti/Kconfig                |  2 ++
> >  drivers/net/ethernet/ti/cpsw.c                 | 46 ++++++++++++++++++++++++--
> >  3 files changed, 50 insertions(+), 2 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
> > index 107caf174a0e..33fe8462edf4 100644
> > --- a/Documentation/devicetree/bindings/net/cpsw.txt
> > +++ b/Documentation/devicetree/bindings/net/cpsw.txt
> > @@ -24,6 +24,8 @@ Optional properties:
> >  - ti,hwmods		: Must be "cpgmac0"
> >  - no_bd_ram		: Must be 0 or 1
> >  - dual_emac		: Specifies Switch to act as Dual EMAC
> > +- syscon		: Phandle to the system control device node, which is
> > +			  the control module device of the am33x
> >  
> >  Slave Properties:
> >  Required properties:
> > @@ -57,6 +59,7 @@ Examples:
> >  		active_slave = <0>;
> >  		cpts_clock_mult = <0x80000000>;
> >  		cpts_clock_shift = <29>;
> > +		syscon = <&cm>;
> >  		cpsw_emac0: slave@0 {
> >  			phy_id = <&davinci_mdio>, <0>;
> >  			phy-mode = "rgmii-txid";
> > @@ -85,6 +88,7 @@ Examples:
> >  		active_slave = <0>;
> >  		cpts_clock_mult = <0x80000000>;
> >  		cpts_clock_shift = <29>;
> > +		syscon = <&cm>;
> >  		cpsw_emac0: slave@0 {
> >  			phy_id = <&davinci_mdio>, <0>;
> >  			phy-mode = "rgmii-txid";
> > diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
> > index 1769700a6070..5d8cb7956113 100644
> > --- a/drivers/net/ethernet/ti/Kconfig
> > +++ b/drivers/net/ethernet/ti/Kconfig
> > @@ -62,6 +62,8 @@ config TI_CPSW
> >  	select TI_DAVINCI_CPDMA
> >  	select TI_DAVINCI_MDIO
> >  	select TI_CPSW_PHY_SEL
> > +	select MFD_SYSCON
> > +	select REGMAP
> >  	---help---
> >  	  This driver supports TI's CPSW Ethernet Switch.
> >  
> > diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
> > index 0bc2c2a2c236..aaf8a42f9633 100644
> > --- a/drivers/net/ethernet/ti/cpsw.c
> > +++ b/drivers/net/ethernet/ti/cpsw.c
> > @@ -33,6 +33,8 @@
> >  #include <linux/of_net.h>
> >  #include <linux/of_device.h>
> >  #include <linux/if_vlan.h>
> > +#include <linux/mfd/syscon.h>
> > +#include <linux/regmap.h>
> >  
> >  #include <linux/pinctrl/consumer.h>
> >  
> > @@ -1816,6 +1818,39 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
> >  	slave->port_vlan = data->dual_emac_res_vlan;
> >  }
> >  
> > +#define AM33XX_CTRL_MAC_LO_REG(id) (0x630 + 0x8 * id)
> > +#define AM33XX_CTRL_MAC_HI_REG(id) (0x630 + 0x8 * id + 0x4)
> > +
> > +static int cpsw_am33xx_cm_get_macid(struct device *dev, int slave,
> > +		u8 *mac_addr)
> > +{
> > +	u32 macid_lo;
> > +	u32 macid_hi;
> > +	struct regmap *syscon;
> > +
> > +	if (!of_machine_is_compatible("ti,am33xx"))
> > +		return 0;
> > +
> > +	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
> > +	if (IS_ERR(syscon)) {
> > +		if (PTR_ERR(syscon) == -ENODEV)
> > +			return 0;
> > +		return PTR_ERR(syscon);
> > +	}
> > +
> > +	regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(slave), &macid_lo);
> > +	regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(slave), &macid_hi);
> > +
> > +	mac_addr[5] = (macid_lo >> 8) & 0xff;
> > +	mac_addr[4] = macid_lo & 0xff;
> > +	mac_addr[3] = (macid_hi >> 24) & 0xff;
> > +	mac_addr[2] = (macid_hi >> 16) & 0xff;
> > +	mac_addr[1] = (macid_hi >> 8) & 0xff;
> > +	mac_addr[0] = macid_hi & 0xff;
> > +
> > +	return 0;
> > +}
> > +
> >  static int cpsw_probe_dt(struct cpsw_platform_data *data,
> >  			 struct platform_device *pdev)
> >  {
> > @@ -1928,8 +1963,15 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
> >  			 PHY_ID_FMT, mdio->name, phyid);
> >  
> >  		mac_addr = of_get_mac_address(slave_node);
> > -		if (mac_addr)
> > -			memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
> > +		if (mac_addr) {
> > +			memcpy(slave_data->mac_addr, mac_addr,
> > +					ETH_ALEN);
> 
> Alignment should match open parenthesis

Thanks, fixed as the rest of the driver is also aligned to the opening
paranthesis.

Best regards,

Markus
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt
index 107caf174a0e..33fe8462edf4 100644
--- a/Documentation/devicetree/bindings/net/cpsw.txt
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -24,6 +24,8 @@  Optional properties:
 - ti,hwmods		: Must be "cpgmac0"
 - no_bd_ram		: Must be 0 or 1
 - dual_emac		: Specifies Switch to act as Dual EMAC
+- syscon		: Phandle to the system control device node, which is
+			  the control module device of the am33x
 
 Slave Properties:
 Required properties:
@@ -57,6 +59,7 @@  Examples:
 		active_slave = <0>;
 		cpts_clock_mult = <0x80000000>;
 		cpts_clock_shift = <29>;
+		syscon = <&cm>;
 		cpsw_emac0: slave@0 {
 			phy_id = <&davinci_mdio>, <0>;
 			phy-mode = "rgmii-txid";
@@ -85,6 +88,7 @@  Examples:
 		active_slave = <0>;
 		cpts_clock_mult = <0x80000000>;
 		cpts_clock_shift = <29>;
+		syscon = <&cm>;
 		cpsw_emac0: slave@0 {
 			phy_id = <&davinci_mdio>, <0>;
 			phy-mode = "rgmii-txid";
diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
index 1769700a6070..5d8cb7956113 100644
--- a/drivers/net/ethernet/ti/Kconfig
+++ b/drivers/net/ethernet/ti/Kconfig
@@ -62,6 +62,8 @@  config TI_CPSW
 	select TI_DAVINCI_CPDMA
 	select TI_DAVINCI_MDIO
 	select TI_CPSW_PHY_SEL
+	select MFD_SYSCON
+	select REGMAP
 	---help---
 	  This driver supports TI's CPSW Ethernet Switch.
 
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 0bc2c2a2c236..aaf8a42f9633 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -33,6 +33,8 @@ 
 #include <linux/of_net.h>
 #include <linux/of_device.h>
 #include <linux/if_vlan.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
 
 #include <linux/pinctrl/consumer.h>
 
@@ -1816,6 +1818,39 @@  static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
 	slave->port_vlan = data->dual_emac_res_vlan;
 }
 
+#define AM33XX_CTRL_MAC_LO_REG(id) (0x630 + 0x8 * id)
+#define AM33XX_CTRL_MAC_HI_REG(id) (0x630 + 0x8 * id + 0x4)
+
+static int cpsw_am33xx_cm_get_macid(struct device *dev, int slave,
+		u8 *mac_addr)
+{
+	u32 macid_lo;
+	u32 macid_hi;
+	struct regmap *syscon;
+
+	if (!of_machine_is_compatible("ti,am33xx"))
+		return 0;
+
+	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+	if (IS_ERR(syscon)) {
+		if (PTR_ERR(syscon) == -ENODEV)
+			return 0;
+		return PTR_ERR(syscon);
+	}
+
+	regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(slave), &macid_lo);
+	regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(slave), &macid_hi);
+
+	mac_addr[5] = (macid_lo >> 8) & 0xff;
+	mac_addr[4] = macid_lo & 0xff;
+	mac_addr[3] = (macid_hi >> 24) & 0xff;
+	mac_addr[2] = (macid_hi >> 16) & 0xff;
+	mac_addr[1] = (macid_hi >> 8) & 0xff;
+	mac_addr[0] = macid_hi & 0xff;
+
+	return 0;
+}
+
 static int cpsw_probe_dt(struct cpsw_platform_data *data,
 			 struct platform_device *pdev)
 {
@@ -1928,8 +1963,15 @@  static int cpsw_probe_dt(struct cpsw_platform_data *data,
 			 PHY_ID_FMT, mdio->name, phyid);
 
 		mac_addr = of_get_mac_address(slave_node);
-		if (mac_addr)
-			memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
+		if (mac_addr) {
+			memcpy(slave_data->mac_addr, mac_addr,
+					ETH_ALEN);
+		} else {
+			ret = cpsw_am33xx_cm_get_macid(&pdev->dev, i,
+					slave_data->mac_addr);
+			if (ret)
+				return ret;
+		}
 
 		slave_data->phy_if = of_get_phy_mode(slave_node);
 		if (slave_data->phy_if < 0) {