[U-Boot] [uboot] [PATCH v5 4/7] net: phy: ti: Allow the driver to be more configurable

[Mugunthan V N]

On Monday 11 April 2016 05:48 PM, Dan Murphy wrote:
> Not all devices use the same internal delay or fifo depth.
> Add the ability to set the internal delay for rx or tx and the
> fifo depth via the devicetree.  If the value is not set in the
> devicetree then set the delay to the default.
> 
> If devicetree is not used then use the default defines within the
> driver.
> 
> Signed-off-by: Dan Murphy <dmurphy at ti.com>
> ---
> 
> v5 - Removed extra space and renamed the bindings per the bindings document - https://patchwork.ozlabs.org/patch/608087/
> 
>  drivers/net/phy/ti.c | 85 +++++++++++++++++++++++++++++++++++++++++++++-------
>  1 file changed, 75 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/net/phy/ti.c b/drivers/net/phy/ti.c
> index 937426b..b8f3ebd 100644
> --- a/drivers/net/phy/ti.c
> +++ b/drivers/net/phy/ti.c
> @@ -6,6 +6,14 @@
>   */
>  #include <common.h>
>  #include <phy.h>
> +#include <linux/compat.h>
> +#include <malloc.h>
> +
> +#include <fdtdec.h>
> +#include <dm.h>
> +#include <dt-bindings/net/ti-dp83867.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;
>  
>  /* TI DP83867 */
>  #define DP83867_DEVADDR		0x1f
> @@ -71,6 +79,17 @@
>  #define MII_MMD_CTRL_INCR_RDWT	0x8000 /* post increment on reads & writes */
>  #define MII_MMD_CTRL_INCR_ON_WT	0xC000 /* post increment on writes only */
>  
> +/* User setting - can be taken from DTS */
> +#define DEFAULT_RX_ID_DELAY	DP83867_RGMIIDCTL_2_25_NS
> +#define DEFAULT_TX_ID_DELAY	DP83867_RGMIIDCTL_2_75_NS
> +#define DEFAULT_FIFO_DEPTH	DP83867_PHYCR_FIFO_DEPTH_4_B_NIB
> +
> +struct dp83867_private {
> +	int rx_id_delay;
> +	int tx_id_delay;
> +	int fifo_depth;
> +};
> +
>  /**
>   * phy_read_mmd_indirect - reads data from the MMD registers
>   * @phydev: The PHY device bus
> @@ -148,16 +167,58 @@ static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
>  		phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
>  }
>  
> -/* User setting - can be taken from DTS */
> -#define RX_ID_DELAY	8
> -#define TX_ID_DELAY	0xa
> -#define FIFO_DEPTH	1
> +#if defined(CONFIG_DM_ETH)
> +/**
> + * dp83867_data_init - Convenience function for setting PHY specific data
> + *
> + * @phydev: the phy_device struct
> + */
> +static int dp83867_of_init(struct phy_device *phydev)
> +{
> +	struct dp83867_private *dp83867 = phydev->priv;
> +	struct udevice *dev = phydev->dev;
> +
> +	dp83867->rx_id_delay = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
> +				 "ti,rx-internal-delay", -1);
> +
> +	dp83867->tx_id_delay = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
> +				 "ti,tx-internal-delay", -1);
> +
> +	dp83867->fifo_depth = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
> +				 "ti,fifo-depth", -1);
> +
> +	return 0;
> +}
> +#else
> +static int dp83867_of_init(struct phy_device *phydev)
> +{
> +	dp83867->rx_id_delay = DEFAULT_RX_ID_DELAY;
> +	dp83867->tx_id_delay = DEFAULT_TX_ID_DELAY;
> +	dp83867->fifo_depth = DEFAULT_FIFO_DEPTH;
> +
> +	return 0;
> +}

Below statement missing:
struct dp83867_private *dp83867 = phydev->priv;

Build error:
~~~~~~~~~~~~
drivers/net/phy/ti.c: In function ‘dp83867_of_init’:
drivers/net/phy/ti.c:184:2: error: ‘dp83867’ undeclared (first use in
this function)
  dp83867->rx_id_delay = DEFAULT_RX_ID_DELAY;
  ^
drivers/net/phy/ti.c:184:2: note: each undeclared identifier is reported
only once for each function it appears in
scripts/Makefile.build:280: recipe for target 'drivers/net/phy/ti.o' failed


> +#endif
>  
>  static int dp83867_config(struct phy_device *phydev)
>  {
> +	struct dp83867_private *dp83867;
>  	unsigned int val, delay, cfg2;
>  	int ret;
>  
> +	if (!phydev->priv) {
> +		dp83867 = kzalloc(sizeof(*dp83867), GFP_KERNEL);
> +		if (!dp83867)
> +			return -ENOMEM;
> +
> +		phydev->priv = dp83867;
> +		ret = dp83867_of_init(phydev);
> +		if (ret)
> +			goto err_out;
> +	} else {
> +		dp83867 = (struct dp83867_private *)phydev->priv;
> +	}
> +
>  	/* Restart the PHY.  */
>  	val = phy_read(phydev, MDIO_DEVAD_NONE, DP83867_CTRL);
>  	phy_write(phydev, MDIO_DEVAD_NONE, DP83867_CTRL,
> @@ -166,9 +227,9 @@ static int dp83867_config(struct phy_device *phydev)
>  	if (phy_interface_is_rgmii(phydev)) {
>  		ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL,
>  			(DP83867_MDI_CROSSOVER_AUTO << DP83867_MDI_CROSSOVER) |
> -			(FIFO_DEPTH << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
> +			(dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
>  		if (ret)
> -			return ret;
> +			goto err_out;
>  	} else {
>  		phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR,
>  			  (BMCR_ANENABLE | BMCR_FULLDPLX | BMCR_SPEED1000));
> @@ -189,8 +250,8 @@ static int dp83867_config(struct phy_device *phydev)
>  			  DP83867_PHYCTRL_SGMIIEN |
>  			  (DP83867_MDI_CROSSOVER_MDIX <<
>  			  DP83867_MDI_CROSSOVER) |
> -			  (FIFO_DEPTH << DP83867_PHYCTRL_RXFIFO_SHIFT) |
> -			  (FIFO_DEPTH  << DP83867_PHYCTRL_TXFIFO_SHIFT));
> +			  (dp83867->fifo_depth << DP83867_PHYCTRL_RXFIFO_SHIFT) |
> +			  (dp83867->fifo_depth << DP83867_PHYCTRL_TXFIFO_SHIFT));
>  		phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_BISCR, 0x0);
>  	}
>  
> @@ -212,8 +273,8 @@ static int dp83867_config(struct phy_device *phydev)
>  		phy_write_mmd_indirect(phydev, DP83867_RGMIICTL,
>  				       DP83867_DEVADDR, phydev->addr, val);
>  
> -		delay = (RX_ID_DELAY |
> -			 (TX_ID_DELAY << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
> +		delay = (dp83867->rx_id_delay |
> +			 (dp83867->tx_id_delay << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
>  
>  		phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,
>  				       DP83867_DEVADDR, phydev->addr, delay);
> @@ -221,6 +282,10 @@ static int dp83867_config(struct phy_device *phydev)
>  
>  	genphy_config_aneg(phydev);
>  	return 0;
> +
> +err_out:
> +	kfree(dp83867);
> +	return ret;
>  }
>  
>  static struct phy_driver DP83867_driver = {
>